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_createClass = function () {\n  function defineProperties(target, props) {\n    for (var i = 0; i < props.length; i++) {\n      var descriptor = props[i];\n      descriptor.enumerable = descriptor.enumerable || false;\n      descriptor.configurable = true;\n      if (\"value\" in descriptor) descriptor.writable = true;\n      Object.defineProperty(target, descriptor.key, descriptor);\n    }\n  }\n\n  return function (Constructor, protoProps, staticProps) {\n    if (protoProps) defineProperties(Constructor.prototype, protoProps);\n    if (staticProps) defineProperties(Constructor, staticProps);\n    return Constructor;\n  };\n}();\n\nfunction _defineProperty(obj, key, value) {\n  if (key in obj) {\n    Object.defineProperty(obj, key, {\n      value: value,\n      enumerable: true,\n      configurable: true,\n      writable: true\n    });\n  } else {\n    obj[key] = value;\n  }\n\n  return obj;\n}\n\nfunction _classCallCheck(instance, Constructor) {\n  if (!(instance instanceof Constructor)) {\n    throw new TypeError(\"Cannot call a class as a function\");\n  }\n}\n\nfunction _possibleConstructorReturn(self, call) {\n  if (!self) {\n    throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n  }\n\n  return call && (typeof call === \"object\" || typeof call === \"function\") ? call : self;\n}\n\nfunction _inherits(subClass, superClass) {\n  if (typeof superClass !== \"function\" && superClass !== null) {\n    throw new TypeError(\"Super expression must either be null or a function, not \" + typeof superClass);\n  }\n\n  subClass.prototype = Object.create(superClass && superClass.prototype, {\n    constructor: {\n      value: subClass,\n      enumerable: false,\n      writable: true,\n      configurable: true\n    }\n  });\n  if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;\n}\n\nimport React, { Component } from 'react';\nimport PropTypes from 'prop-types';\nimport classnames from 'classnames';\n\nvar PanelContent = function (_Component) {\n  _inherits(PanelContent, _Component);\n\n  function PanelContent() {\n    _classCallCheck(this, PanelContent);\n\n    return _possibleConstructorReturn(this, (PanelContent.__proto__ || Object.getPrototypeOf(PanelContent)).apply(this, arguments));\n  }\n\n  _createClass(PanelContent, [{\n    key: 'shouldComponentUpdate',\n    value: function shouldComponentUpdate(nextProps) {\n      return this.props.forceRender || this.props.isActive || nextProps.isActive;\n    }\n  }, {\n    key: 'render',\n    value: function render() {\n      var _classnames;\n\n      this._isActived = this.props.forceRender || this._isActived || this.props.isActive;\n\n      if (!this._isActived) {\n        return null;\n      }\n\n      var _props = this.props,\n          prefixCls = _props.prefixCls,\n          isActive = _props.isActive,\n          children = _props.children,\n          destroyInactivePanel = _props.destroyInactivePanel,\n          forceRender = _props.forceRender,\n          role = _props.role;\n      var contentCls = classnames((_classnames = {}, _defineProperty(_classnames, prefixCls + '-content', true), _defineProperty(_classnames, prefixCls + '-content-active', isActive), _defineProperty(_classnames, prefixCls + '-content-inactive', !isActive), _classnames));\n      var child = !forceRender && !isActive && destroyInactivePanel ? null : React.createElement('div', {\n        className: prefixCls + '-content-box'\n      }, children);\n      return React.createElement('div', {\n        className: contentCls,\n        role: role\n      }, child);\n    }\n  }]);\n\n  return PanelContent;\n}(Component);\n\nPanelContent.propTypes = {\n  prefixCls: PropTypes.string,\n  isActive: PropTypes.bool,\n  children: PropTypes.any,\n  destroyInactivePanel: PropTypes.bool,\n  forceRender: PropTypes.bool,\n  role: PropTypes.string\n};\nexport default PanelContent;","var _createClass = function () {\n  function defineProperties(target, props) {\n    for (var i = 0; i < props.length; i++) {\n      var descriptor = props[i];\n      descriptor.enumerable = descriptor.enumerable || false;\n      descriptor.configurable = true;\n      if (\"value\" in descriptor) descriptor.writable = true;\n      Object.defineProperty(target, descriptor.key, descriptor);\n    }\n  }\n\n  return function (Constructor, protoProps, staticProps) {\n    if (protoProps) defineProperties(Constructor.prototype, protoProps);\n    if (staticProps) defineProperties(Constructor, staticProps);\n    return Constructor;\n  };\n}();\n\nfunction _defineProperty(obj, key, value) {\n  if (key in obj) {\n    Object.defineProperty(obj, key, {\n      value: value,\n      enumerable: true,\n      configurable: true,\n      writable: true\n    });\n  } else {\n    obj[key] = value;\n  }\n\n  return obj;\n}\n\nfunction _classCallCheck(instance, Constructor) {\n  if (!(instance instanceof Constructor)) {\n    throw new TypeError(\"Cannot call a class as a function\");\n  }\n}\n\nfunction _possibleConstructorReturn(self, call) {\n  if (!self) {\n    throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n  }\n\n  return call && (typeof call === \"object\" || typeof call === \"function\") ? call : self;\n}\n\nfunction _inherits(subClass, superClass) {\n  if (typeof superClass !== \"function\" && superClass !== null) {\n    throw new TypeError(\"Super expression must either be null or a function, not \" + typeof superClass);\n  }\n\n  subClass.prototype = Object.create(superClass && superClass.prototype, {\n    constructor: {\n      value: subClass,\n      enumerable: false,\n      writable: true,\n      configurable: true\n    }\n  });\n  if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;\n}\n\nimport React, { Component } from 'react';\nimport PropTypes from 'prop-types';\nimport classNames from 'classnames';\nimport PanelContent from './PanelContent';\nimport Animate from 'rc-animate';\n\nvar CollapsePanel = function (_Component) {\n  _inherits(CollapsePanel, _Component);\n\n  function CollapsePanel() {\n    var _ref;\n\n    var _temp, _this, _ret;\n\n    _classCallCheck(this, CollapsePanel);\n\n    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    return _ret = (_temp = (_this = _possibleConstructorReturn(this, (_ref = CollapsePanel.__proto__ || Object.getPrototypeOf(CollapsePanel)).call.apply(_ref, [this].concat(args))), _this), _this.handleItemClick = function () {\n      if (_this.props.onItemClick) {\n        _this.props.onItemClick();\n      }\n    }, _this.handleKeyPress = function (e) {\n      if (e.key === 'Enter' || e.keyCode === 13 || e.which === 13) {\n        _this.handleItemClick();\n      }\n    }, _temp), _possibleConstructorReturn(_this, _ret);\n  }\n\n  _createClass(CollapsePanel, [{\n    key: 'render',\n    value: function render() {\n      var _classNames2;\n\n      var _props = this.props,\n          className = _props.className,\n          id = _props.id,\n          style = _props.style,\n          prefixCls = _props.prefixCls,\n          header = _props.header,\n          headerClass = _props.headerClass,\n          children = _props.children,\n          isActive = _props.isActive,\n          showArrow = _props.showArrow,\n          destroyInactivePanel = _props.destroyInactivePanel,\n          disabled = _props.disabled,\n          accordion = _props.accordion,\n          forceRender = _props.forceRender;\n      var headerCls = classNames(prefixCls + '-header', _defineProperty({}, headerClass, headerClass));\n      var itemCls = classNames((_classNames2 = {}, _defineProperty(_classNames2, prefixCls + '-item', true), _defineProperty(_classNames2, prefixCls + '-item-active', isActive), _defineProperty(_classNames2, prefixCls + '-item-disabled', disabled), _classNames2), className);\n      return React.createElement('div', {\n        className: itemCls,\n        style: style,\n        id: id\n      }, React.createElement('div', {\n        className: headerCls,\n        onClick: this.handleItemClick,\n        role: accordion ? 'tab' : 'button',\n        tabIndex: disabled ? -1 : 0,\n        'aria-expanded': '' + isActive,\n        onKeyPress: this.handleKeyPress\n      }, showArrow && React.createElement('i', {\n        className: 'arrow'\n      }), header), React.createElement(Animate, {\n        showProp: 'isActive',\n        exclusive: true,\n        component: '',\n        animation: this.props.openAnimation\n      }, React.createElement(PanelContent, {\n        prefixCls: prefixCls,\n        isActive: isActive,\n        destroyInactivePanel: destroyInactivePanel,\n        forceRender: forceRender,\n        role: accordion ? 'tabpanel' : null\n      }, children)));\n    }\n  }]);\n\n  return CollapsePanel;\n}(Component);\n\nCollapsePanel.propTypes = {\n  className: PropTypes.oneOfType([PropTypes.string, PropTypes.object]),\n  id: PropTypes.string,\n  children: PropTypes.any,\n  openAnimation: PropTypes.object,\n  prefixCls: PropTypes.string,\n  header: PropTypes.oneOfType([PropTypes.string, PropTypes.number, PropTypes.node]),\n  headerClass: PropTypes.string,\n  showArrow: PropTypes.bool,\n  isActive: PropTypes.bool,\n  onItemClick: PropTypes.func,\n  style: PropTypes.object,\n  destroyInactivePanel: PropTypes.bool,\n  disabled: PropTypes.bool,\n  accordion: PropTypes.bool,\n  forceRender: PropTypes.bool\n};\nCollapsePanel.defaultProps = {\n  showArrow: true,\n  isActive: false,\n  destroyInactivePanel: false,\n  onItemClick: function onItemClick() {},\n  headerClass: '',\n  forceRender: false\n};\nexport default CollapsePanel;","import cssAnimation from 'css-animation';\n\nfunction animate(node, show, transitionName, done) {\n  var height = void 0;\n  return cssAnimation(node, transitionName, {\n    start: function start() {\n      if (!show) {\n        node.style.height = node.offsetHeight + 'px';\n      } else {\n        height = node.offsetHeight;\n        node.style.height = 0;\n      }\n    },\n    active: function active() {\n      node.style.height = (show ? height : 0) + 'px';\n    },\n    end: function end() {\n      node.style.height = '';\n      done();\n    }\n  });\n}\n\nfunction animation(prefixCls) {\n  return {\n    enter: function enter(node, done) {\n      return animate(node, true, prefixCls + '-anim', done);\n    },\n    leave: function leave(node, done) {\n      return animate(node, false, prefixCls + '-anim', done);\n    }\n  };\n}\n\nexport default animation;","var _createClass = function () {\n  function defineProperties(target, props) {\n    for (var i = 0; i < props.length; i++) {\n      var descriptor = props[i];\n      descriptor.enumerable = descriptor.enumerable || false;\n      descriptor.configurable = true;\n      if (\"value\" in descriptor) descriptor.writable = true;\n      Object.defineProperty(target, descriptor.key, descriptor);\n    }\n  }\n\n  return function (Constructor, protoProps, staticProps) {\n    if (protoProps) defineProperties(Constructor.prototype, protoProps);\n    if (staticProps) defineProperties(Constructor, staticProps);\n    return Constructor;\n  };\n}();\n\nfunction _defineProperty(obj, key, value) {\n  if (key in obj) {\n    Object.defineProperty(obj, key, {\n      value: value,\n      enumerable: true,\n      configurable: true,\n      writable: true\n    });\n  } else {\n    obj[key] = value;\n  }\n\n  return obj;\n}\n\nfunction _toConsumableArray(arr) {\n  if (Array.isArray(arr)) {\n    for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) {\n      arr2[i] = arr[i];\n    }\n\n    return arr2;\n  } else {\n    return Array.from(arr);\n  }\n}\n\nfunction _classCallCheck(instance, Constructor) {\n  if (!(instance instanceof Constructor)) {\n    throw new TypeError(\"Cannot call a class as a function\");\n  }\n}\n\nfunction _possibleConstructorReturn(self, call) {\n  if (!self) {\n    throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n  }\n\n  return call && (typeof call === \"object\" || typeof call === \"function\") ? call : self;\n}\n\nfunction _inherits(subClass, superClass) {\n  if (typeof superClass !== \"function\" && superClass !== null) {\n    throw new TypeError(\"Super expression must either be null or a function, not \" + typeof superClass);\n  }\n\n  subClass.prototype = Object.create(superClass && superClass.prototype, {\n    constructor: {\n      value: subClass,\n      enumerable: false,\n      writable: true,\n      configurable: true\n    }\n  });\n  if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;\n}\n\nimport React, { Component, Children } from 'react';\nimport PropTypes from 'prop-types';\nimport CollapsePanel from './Panel';\nimport openAnimationFactory from './openAnimationFactory';\nimport classNames from 'classnames';\n\nfunction toArray(activeKey) {\n  var currentActiveKey = activeKey;\n\n  if (!Array.isArray(currentActiveKey)) {\n    currentActiveKey = currentActiveKey ? [currentActiveKey] : [];\n  }\n\n  return currentActiveKey;\n}\n\nvar Collapse = function (_Component) {\n  _inherits(Collapse, _Component);\n\n  function Collapse(props) {\n    _classCallCheck(this, Collapse);\n\n    var _this = _possibleConstructorReturn(this, (Collapse.__proto__ || Object.getPrototypeOf(Collapse)).call(this, props));\n\n    var _this$props = _this.props,\n        activeKey = _this$props.activeKey,\n        defaultActiveKey = _this$props.defaultActiveKey;\n    var currentActiveKey = defaultActiveKey;\n\n    if ('activeKey' in _this.props) {\n      currentActiveKey = activeKey;\n    }\n\n    _this.state = {\n      openAnimation: _this.props.openAnimation || openAnimationFactory(_this.props.prefixCls),\n      activeKey: toArray(currentActiveKey)\n    };\n    return _this;\n  }\n\n  _createClass(Collapse, [{\n    key: 'componentWillReceiveProps',\n    value: function componentWillReceiveProps(nextProps) {\n      if ('activeKey' in nextProps) {\n        this.setState({\n          activeKey: toArray(nextProps.activeKey)\n        });\n      }\n\n      if ('openAnimation' in nextProps) {\n        this.setState({\n          openAnimation: nextProps.openAnimation\n        });\n      }\n    }\n  }, {\n    key: 'onClickItem',\n    value: function onClickItem(key) {\n      var activeKey = this.state.activeKey;\n\n      if (this.props.accordion) {\n        activeKey = activeKey[0] === key ? [] : [key];\n      } else {\n        activeKey = [].concat(_toConsumableArray(activeKey));\n        var index = activeKey.indexOf(key);\n        var isActive = index > -1;\n\n        if (isActive) {\n          // remove active state\n          activeKey.splice(index, 1);\n        } else {\n          activeKey.push(key);\n        }\n      }\n\n      this.setActiveKey(activeKey);\n    }\n  }, {\n    key: 'getItems',\n    value: function getItems() {\n      var _this2 = this;\n\n      var activeKey = this.state.activeKey;\n      var _props = this.props,\n          prefixCls = _props.prefixCls,\n          accordion = _props.accordion,\n          destroyInactivePanel = _props.destroyInactivePanel;\n      var newChildren = [];\n      Children.forEach(this.props.children, function (child, index) {\n        if (!child) return; // If there is no key provide, use the panel order as default key\n\n        var key = child.key || String(index);\n        var _child$props = child.props,\n            header = _child$props.header,\n            headerClass = _child$props.headerClass,\n            disabled = _child$props.disabled;\n        var isActive = false;\n\n        if (accordion) {\n          isActive = activeKey[0] === key;\n        } else {\n          isActive = activeKey.indexOf(key) > -1;\n        }\n\n        var props = {\n          key: key,\n          header: header,\n          headerClass: headerClass,\n          isActive: isActive,\n          prefixCls: prefixCls,\n          destroyInactivePanel: destroyInactivePanel,\n          openAnimation: _this2.state.openAnimation,\n          accordion: accordion,\n          children: child.props.children,\n          onItemClick: disabled ? null : function () {\n            return _this2.onClickItem(key);\n          }\n        };\n        newChildren.push(React.cloneElement(child, props));\n      });\n      return newChildren;\n    }\n  }, {\n    key: 'setActiveKey',\n    value: function setActiveKey(activeKey) {\n      if (!('activeKey' in this.props)) {\n        this.setState({\n          activeKey: activeKey\n        });\n      }\n\n      this.props.onChange(this.props.accordion ? activeKey[0] : activeKey);\n    }\n  }, {\n    key: 'render',\n    value: function render() {\n      var _classNames;\n\n      var _props2 = this.props,\n          prefixCls = _props2.prefixCls,\n          className = _props2.className,\n          style = _props2.style,\n          accordion = _props2.accordion;\n      var collapseClassName = classNames((_classNames = {}, _defineProperty(_classNames, prefixCls, true), _defineProperty(_classNames, className, !!className), _classNames));\n      return React.createElement('div', {\n        className: collapseClassName,\n        style: style,\n        role: accordion ? 'tablist' : null\n      }, this.getItems());\n    }\n  }]);\n\n  return Collapse;\n}(Component);\n\nCollapse.propTypes = {\n  children: PropTypes.any,\n  prefixCls: PropTypes.string,\n  activeKey: PropTypes.oneOfType([PropTypes.string, PropTypes.arrayOf(PropTypes.string)]),\n  defaultActiveKey: PropTypes.oneOfType([PropTypes.string, PropTypes.arrayOf(PropTypes.string)]),\n  openAnimation: PropTypes.object,\n  onChange: PropTypes.func,\n  accordion: PropTypes.bool,\n  className: PropTypes.string,\n  style: PropTypes.object,\n  destroyInactivePanel: PropTypes.bool\n};\nCollapse.defaultProps = {\n  prefixCls: 'rc-collapse',\n  onChange: function onChange() {},\n  accordion: false,\n  destroyInactivePanel: false\n};\nCollapse.Panel = CollapsePanel;\nexport default Collapse;","import Collapse from './Collapse';\nexport default Collapse;\nexport var Panel = Collapse.Panel;","import getPrototypeOf from \"./getPrototypeOf\";\nimport superPropBase from \"./superPropBase\";\nexport default function _get(target, property, receiver) {\n  if (typeof Reflect !== \"undefined\" && Reflect.get) {\n    _get = Reflect.get;\n  } else {\n    _get = function _get(target, property, receiver) {\n      var base = superPropBase(target, property);\n      if (!base) return;\n      var desc = Object.getOwnPropertyDescriptor(base, property);\n\n      if (desc.get) {\n        return desc.get.call(receiver);\n      }\n\n      return desc.value;\n    };\n  }\n\n  return _get(target, property, receiver || target);\n}","import getPrototypeOf from \"./getPrototypeOf\";\nexport default function _superPropBase(object, property) {\n  while (!Object.prototype.hasOwnProperty.call(object, property)) {\n    object = getPrototypeOf(object);\n    if (object === null) break;\n  }\n\n  return object;\n}","/**\r\n * Expose `Emitter`.\r\n */\nif (typeof module !== 'undefined') {\n  module.exports = Emitter;\n}\n/**\r\n * Initialize a new `Emitter`.\r\n *\r\n * @api public\r\n */\n\n\nfunction Emitter(obj) {\n  if (obj) return mixin(obj);\n}\n\n;\n/**\r\n * Mixin the emitter properties.\r\n *\r\n * @param {Object} obj\r\n * @return {Object}\r\n * @api private\r\n */\n\nfunction mixin(obj) {\n  for (var key in Emitter.prototype) {\n    obj[key] = Emitter.prototype[key];\n  }\n\n  return obj;\n}\n/**\r\n * Listen on the given `event` with `fn`.\r\n *\r\n * @param {String} event\r\n * @param {Function} fn\r\n * @return {Emitter}\r\n * @api public\r\n */\n\n\nEmitter.prototype.on = Emitter.prototype.addEventListener = function (event, fn) {\n  this._callbacks = this._callbacks || {};\n  (this._callbacks['$' + event] = this._callbacks['$' + event] || []).push(fn);\n  return this;\n};\n/**\r\n * Adds an `event` listener that will be invoked a single\r\n * time then automatically removed.\r\n *\r\n * @param {String} event\r\n * @param {Function} fn\r\n * @return {Emitter}\r\n * @api public\r\n */\n\n\nEmitter.prototype.once = function (event, fn) {\n  function on() {\n    this.off(event, on);\n    fn.apply(this, arguments);\n  }\n\n  on.fn = fn;\n  this.on(event, on);\n  return this;\n};\n/**\r\n * Remove the given callback for `event` or all\r\n * registered callbacks.\r\n *\r\n * @param {String} event\r\n * @param {Function} fn\r\n * @return {Emitter}\r\n * @api public\r\n */\n\n\nEmitter.prototype.off = Emitter.prototype.removeListener = Emitter.prototype.removeAllListeners = Emitter.prototype.removeEventListener = function (event, fn) {\n  this._callbacks = this._callbacks || {}; // all\n\n  if (0 == arguments.length) {\n    this._callbacks = {};\n    return this;\n  } // specific event\n\n\n  var callbacks = this._callbacks['$' + event];\n  if (!callbacks) return this; // remove all handlers\n\n  if (1 == arguments.length) {\n    delete this._callbacks['$' + event];\n    return this;\n  } // remove specific handler\n\n\n  var cb;\n\n  for (var i = 0; i < callbacks.length; i++) {\n    cb = callbacks[i];\n\n    if (cb === fn || cb.fn === fn) {\n      callbacks.splice(i, 1);\n      break;\n    }\n  }\n\n  return this;\n};\n/**\r\n * Emit `event` with the given args.\r\n *\r\n * @param {String} event\r\n * @param {Mixed} ...\r\n * @return {Emitter}\r\n */\n\n\nEmitter.prototype.emit = function (event) {\n  this._callbacks = this._callbacks || {};\n  var args = [].slice.call(arguments, 1),\n      callbacks = this._callbacks['$' + event];\n\n  if (callbacks) {\n    callbacks = callbacks.slice(0);\n\n    for (var i = 0, len = callbacks.length; i < len; ++i) {\n      callbacks[i].apply(this, args);\n    }\n  }\n\n  return this;\n};\n/**\r\n * Return array of callbacks for `event`.\r\n *\r\n * @param {String} event\r\n * @return {Array}\r\n * @api public\r\n */\n\n\nEmitter.prototype.listeners = function (event) {\n  this._callbacks = this._callbacks || {};\n  return this._callbacks['$' + event] || [];\n};\n/**\r\n * Check if this emitter has `event` handlers.\r\n *\r\n * @param {String} event\r\n * @return {Boolean}\r\n * @api public\r\n */\n\n\nEmitter.prototype.hasListeners = function (event) {\n  return !!this.listeners(event).length;\n};","/**\n * Module dependencies.\n */\nvar keys = require('./keys');\n\nvar hasBinary = require('has-binary2');\n\nvar sliceBuffer = require('arraybuffer.slice');\n\nvar after = require('after');\n\nvar utf8 = require('./utf8');\n\nvar base64encoder;\n\nif (typeof ArrayBuffer !== 'undefined') {\n  base64encoder = require('base64-arraybuffer');\n}\n/**\n * Check if we are running an android browser. That requires us to use\n * ArrayBuffer with polling transports...\n *\n * http://ghinda.net/jpeg-blob-ajax-android/\n */\n\n\nvar isAndroid = typeof navigator !== 'undefined' && /Android/i.test(navigator.userAgent);\n/**\n * Check if we are running in PhantomJS.\n * Uploading a Blob with PhantomJS does not work correctly, as reported here:\n * https://github.com/ariya/phantomjs/issues/11395\n * @type boolean\n */\n\nvar isPhantomJS = typeof navigator !== 'undefined' && /PhantomJS/i.test(navigator.userAgent);\n/**\n * When true, avoids using Blobs to encode payloads.\n * @type boolean\n */\n\nvar dontSendBlobs = isAndroid || isPhantomJS;\n/**\n * Current protocol version.\n */\n\nexports.protocol = 3;\n/**\n * Packet types.\n */\n\nvar packets = exports.packets = {\n  open: 0 // non-ws\n  ,\n  close: 1 // non-ws\n  ,\n  ping: 2,\n  pong: 3,\n  message: 4,\n  upgrade: 5,\n  noop: 6\n};\nvar packetslist = keys(packets);\n/**\n * Premade error packet.\n */\n\nvar err = {\n  type: 'error',\n  data: 'parser error'\n};\n/**\n * Create a blob api even for blob builder when vendor prefixes exist\n */\n\nvar Blob = require('blob');\n/**\n * Encodes a packet.\n *\n *     <packet type id> [ <data> ]\n *\n * Example:\n *\n *     5hello world\n *     3\n *     4\n *\n * Binary is encoded in an identical principle\n *\n * @api private\n */\n\n\nexports.encodePacket = function (packet, supportsBinary, utf8encode, callback) {\n  if (typeof supportsBinary === 'function') {\n    callback = supportsBinary;\n    supportsBinary = false;\n  }\n\n  if (typeof utf8encode === 'function') {\n    callback = utf8encode;\n    utf8encode = null;\n  }\n\n  var data = packet.data === undefined ? undefined : packet.data.buffer || packet.data;\n\n  if (typeof ArrayBuffer !== 'undefined' && data instanceof ArrayBuffer) {\n    return encodeArrayBuffer(packet, supportsBinary, callback);\n  } else if (typeof Blob !== 'undefined' && data instanceof Blob) {\n    return encodeBlob(packet, supportsBinary, callback);\n  } // might be an object with { base64: true, data: dataAsBase64String }\n\n\n  if (data && data.base64) {\n    return encodeBase64Object(packet, callback);\n  } // Sending data as a utf-8 string\n\n\n  var encoded = packets[packet.type]; // data fragment is optional\n\n  if (undefined !== packet.data) {\n    encoded += utf8encode ? utf8.encode(String(packet.data), {\n      strict: false\n    }) : String(packet.data);\n  }\n\n  return callback('' + encoded);\n};\n\nfunction encodeBase64Object(packet, callback) {\n  // packet data is an object { base64: true, data: dataAsBase64String }\n  var message = 'b' + exports.packets[packet.type] + packet.data.data;\n  return callback(message);\n}\n/**\n * Encode packet helpers for binary types\n */\n\n\nfunction encodeArrayBuffer(packet, supportsBinary, callback) {\n  if (!supportsBinary) {\n    return exports.encodeBase64Packet(packet, callback);\n  }\n\n  var data = packet.data;\n  var contentArray = new Uint8Array(data);\n  var resultBuffer = new Uint8Array(1 + data.byteLength);\n  resultBuffer[0] = packets[packet.type];\n\n  for (var i = 0; i < contentArray.length; i++) {\n    resultBuffer[i + 1] = contentArray[i];\n  }\n\n  return callback(resultBuffer.buffer);\n}\n\nfunction encodeBlobAsArrayBuffer(packet, supportsBinary, callback) {\n  if (!supportsBinary) {\n    return exports.encodeBase64Packet(packet, callback);\n  }\n\n  var fr = new FileReader();\n\n  fr.onload = function () {\n    exports.encodePacket({\n      type: packet.type,\n      data: fr.result\n    }, supportsBinary, true, callback);\n  };\n\n  return fr.readAsArrayBuffer(packet.data);\n}\n\nfunction encodeBlob(packet, supportsBinary, callback) {\n  if (!supportsBinary) {\n    return exports.encodeBase64Packet(packet, callback);\n  }\n\n  if (dontSendBlobs) {\n    return encodeBlobAsArrayBuffer(packet, supportsBinary, callback);\n  }\n\n  var length = new Uint8Array(1);\n  length[0] = packets[packet.type];\n  var blob = new Blob([length.buffer, packet.data]);\n  return callback(blob);\n}\n/**\n * Encodes a packet with binary data in a base64 string\n *\n * @param {Object} packet, has `type` and `data`\n * @return {String} base64 encoded message\n */\n\n\nexports.encodeBase64Packet = function (packet, callback) {\n  var message = 'b' + exports.packets[packet.type];\n\n  if (typeof Blob !== 'undefined' && packet.data instanceof Blob) {\n    var fr = new FileReader();\n\n    fr.onload = function () {\n      var b64 = fr.result.split(',')[1];\n      callback(message + b64);\n    };\n\n    return fr.readAsDataURL(packet.data);\n  }\n\n  var b64data;\n\n  try {\n    b64data = String.fromCharCode.apply(null, new Uint8Array(packet.data));\n  } catch (e) {\n    // iPhone Safari doesn't let you apply with typed arrays\n    var typed = new Uint8Array(packet.data);\n    var basic = new Array(typed.length);\n\n    for (var i = 0; i < typed.length; i++) {\n      basic[i] = typed[i];\n    }\n\n    b64data = String.fromCharCode.apply(null, basic);\n  }\n\n  message += btoa(b64data);\n  return callback(message);\n};\n/**\n * Decodes a packet. Changes format to Blob if requested.\n *\n * @return {Object} with `type` and `data` (if any)\n * @api private\n */\n\n\nexports.decodePacket = function (data, binaryType, utf8decode) {\n  if (data === undefined) {\n    return err;\n  } // String data\n\n\n  if (typeof data === 'string') {\n    if (data.charAt(0) === 'b') {\n      return exports.decodeBase64Packet(data.substr(1), binaryType);\n    }\n\n    if (utf8decode) {\n      data = tryDecode(data);\n\n      if (data === false) {\n        return err;\n      }\n    }\n\n    var type = data.charAt(0);\n\n    if (Number(type) != type || !packetslist[type]) {\n      return err;\n    }\n\n    if (data.length > 1) {\n      return {\n        type: packetslist[type],\n        data: data.substring(1)\n      };\n    } else {\n      return {\n        type: packetslist[type]\n      };\n    }\n  }\n\n  var asArray = new Uint8Array(data);\n  var type = asArray[0];\n  var rest = sliceBuffer(data, 1);\n\n  if (Blob && binaryType === 'blob') {\n    rest = new Blob([rest]);\n  }\n\n  return {\n    type: packetslist[type],\n    data: rest\n  };\n};\n\nfunction tryDecode(data) {\n  try {\n    data = utf8.decode(data, {\n      strict: false\n    });\n  } catch (e) {\n    return false;\n  }\n\n  return data;\n}\n/**\n * Decodes a packet encoded in a base64 string\n *\n * @param {String} base64 encoded message\n * @return {Object} with `type` and `data` (if any)\n */\n\n\nexports.decodeBase64Packet = function (msg, binaryType) {\n  var type = packetslist[msg.charAt(0)];\n\n  if (!base64encoder) {\n    return {\n      type: type,\n      data: {\n        base64: true,\n        data: msg.substr(1)\n      }\n    };\n  }\n\n  var data = base64encoder.decode(msg.substr(1));\n\n  if (binaryType === 'blob' && Blob) {\n    data = new Blob([data]);\n  }\n\n  return {\n    type: type,\n    data: data\n  };\n};\n/**\n * Encodes multiple messages (payload).\n *\n *     <length>:data\n *\n * Example:\n *\n *     11:hello world2:hi\n *\n * If any contents are binary, they will be encoded as base64 strings. Base64\n * encoded strings are marked with a b before the length specifier\n *\n * @param {Array} packets\n * @api private\n */\n\n\nexports.encodePayload = function (packets, supportsBinary, callback) {\n  if (typeof supportsBinary === 'function') {\n    callback = supportsBinary;\n    supportsBinary = null;\n  }\n\n  var isBinary = hasBinary(packets);\n\n  if (supportsBinary && isBinary) {\n    if (Blob && !dontSendBlobs) {\n      return exports.encodePayloadAsBlob(packets, callback);\n    }\n\n    return exports.encodePayloadAsArrayBuffer(packets, callback);\n  }\n\n  if (!packets.length) {\n    return callback('0:');\n  }\n\n  function setLengthHeader(message) {\n    return message.length + ':' + message;\n  }\n\n  function encodeOne(packet, doneCallback) {\n    exports.encodePacket(packet, !isBinary ? false : supportsBinary, false, function (message) {\n      doneCallback(null, setLengthHeader(message));\n    });\n  }\n\n  map(packets, encodeOne, function (err, results) {\n    return callback(results.join(''));\n  });\n};\n/**\n * Async array map using after\n */\n\n\nfunction map(ary, each, done) {\n  var result = new Array(ary.length);\n  var next = after(ary.length, done);\n\n  var eachWithIndex = function eachWithIndex(i, el, cb) {\n    each(el, function (error, msg) {\n      result[i] = msg;\n      cb(error, result);\n    });\n  };\n\n  for (var i = 0; i < ary.length; i++) {\n    eachWithIndex(i, ary[i], next);\n  }\n}\n/*\n * Decodes data when a payload is maybe expected. Possible binary contents are\n * decoded from their base64 representation\n *\n * @param {String} data, callback method\n * @api public\n */\n\n\nexports.decodePayload = function (data, binaryType, callback) {\n  if (typeof data !== 'string') {\n    return exports.decodePayloadAsBinary(data, binaryType, callback);\n  }\n\n  if (typeof binaryType === 'function') {\n    callback = binaryType;\n    binaryType = null;\n  }\n\n  var packet;\n\n  if (data === '') {\n    // parser error - ignoring payload\n    return callback(err, 0, 1);\n  }\n\n  var length = '',\n      n,\n      msg;\n\n  for (var i = 0, l = data.length; i < l; i++) {\n    var chr = data.charAt(i);\n\n    if (chr !== ':') {\n      length += chr;\n      continue;\n    }\n\n    if (length === '' || length != (n = Number(length))) {\n      // parser error - ignoring payload\n      return callback(err, 0, 1);\n    }\n\n    msg = data.substr(i + 1, n);\n\n    if (length != msg.length) {\n      // parser error - ignoring payload\n      return callback(err, 0, 1);\n    }\n\n    if (msg.length) {\n      packet = exports.decodePacket(msg, binaryType, false);\n\n      if (err.type === packet.type && err.data === packet.data) {\n        // parser error in individual packet - ignoring payload\n        return callback(err, 0, 1);\n      }\n\n      var ret = callback(packet, i + n, l);\n      if (false === ret) return;\n    } // advance cursor\n\n\n    i += n;\n    length = '';\n  }\n\n  if (length !== '') {\n    // parser error - ignoring payload\n    return callback(err, 0, 1);\n  }\n};\n/**\n * Encodes multiple messages (payload) as binary.\n *\n * <1 = binary, 0 = string><number from 0-9><number from 0-9>[...]<number\n * 255><data>\n *\n * Example:\n * 1 3 255 1 2 3, if the binary contents are interpreted as 8 bit integers\n *\n * @param {Array} packets\n * @return {ArrayBuffer} encoded payload\n * @api private\n */\n\n\nexports.encodePayloadAsArrayBuffer = function (packets, callback) {\n  if (!packets.length) {\n    return callback(new ArrayBuffer(0));\n  }\n\n  function encodeOne(packet, doneCallback) {\n    exports.encodePacket(packet, true, true, function (data) {\n      return doneCallback(null, data);\n    });\n  }\n\n  map(packets, encodeOne, function (err, encodedPackets) {\n    var totalLength = encodedPackets.reduce(function (acc, p) {\n      var len;\n\n      if (typeof p === 'string') {\n        len = p.length;\n      } else {\n        len = p.byteLength;\n      }\n\n      return acc + len.toString().length + len + 2; // string/binary identifier + separator = 2\n    }, 0);\n    var resultArray = new Uint8Array(totalLength);\n    var bufferIndex = 0;\n    encodedPackets.forEach(function (p) {\n      var isString = typeof p === 'string';\n      var ab = p;\n\n      if (isString) {\n        var view = new Uint8Array(p.length);\n\n        for (var i = 0; i < p.length; i++) {\n          view[i] = p.charCodeAt(i);\n        }\n\n        ab = view.buffer;\n      }\n\n      if (isString) {\n        // not true binary\n        resultArray[bufferIndex++] = 0;\n      } else {\n        // true binary\n        resultArray[bufferIndex++] = 1;\n      }\n\n      var lenStr = ab.byteLength.toString();\n\n      for (var i = 0; i < lenStr.length; i++) {\n        resultArray[bufferIndex++] = parseInt(lenStr[i]);\n      }\n\n      resultArray[bufferIndex++] = 255;\n      var view = new Uint8Array(ab);\n\n      for (var i = 0; i < view.length; i++) {\n        resultArray[bufferIndex++] = view[i];\n      }\n    });\n    return callback(resultArray.buffer);\n  });\n};\n/**\n * Encode as Blob\n */\n\n\nexports.encodePayloadAsBlob = function (packets, callback) {\n  function encodeOne(packet, doneCallback) {\n    exports.encodePacket(packet, true, true, function (encoded) {\n      var binaryIdentifier = new Uint8Array(1);\n      binaryIdentifier[0] = 1;\n\n      if (typeof encoded === 'string') {\n        var view = new Uint8Array(encoded.length);\n\n        for (var i = 0; i < encoded.length; i++) {\n          view[i] = encoded.charCodeAt(i);\n        }\n\n        encoded = view.buffer;\n        binaryIdentifier[0] = 0;\n      }\n\n      var len = encoded instanceof ArrayBuffer ? encoded.byteLength : encoded.size;\n      var lenStr = len.toString();\n      var lengthAry = new Uint8Array(lenStr.length + 1);\n\n      for (var i = 0; i < lenStr.length; i++) {\n        lengthAry[i] = parseInt(lenStr[i]);\n      }\n\n      lengthAry[lenStr.length] = 255;\n\n      if (Blob) {\n        var blob = new Blob([binaryIdentifier.buffer, lengthAry.buffer, encoded]);\n        doneCallback(null, blob);\n      }\n    });\n  }\n\n  map(packets, encodeOne, function (err, results) {\n    return callback(new Blob(results));\n  });\n};\n/*\n * Decodes data when a payload is maybe expected. Strings are decoded by\n * interpreting each byte as a key code for entries marked to start with 0. See\n * description of encodePayloadAsBinary\n *\n * @param {ArrayBuffer} data, callback method\n * @api public\n */\n\n\nexports.decodePayloadAsBinary = function (data, binaryType, callback) {\n  if (typeof binaryType === 'function') {\n    callback = binaryType;\n    binaryType = null;\n  }\n\n  var bufferTail = data;\n  var buffers = [];\n\n  while (bufferTail.byteLength > 0) {\n    var tailArray = new Uint8Array(bufferTail);\n    var isString = tailArray[0] === 0;\n    var msgLength = '';\n\n    for (var i = 1;; i++) {\n      if (tailArray[i] === 255) break; // 310 = char length of Number.MAX_VALUE\n\n      if (msgLength.length > 310) {\n        return callback(err, 0, 1);\n      }\n\n      msgLength += tailArray[i];\n    }\n\n    bufferTail = sliceBuffer(bufferTail, 2 + msgLength.length);\n    msgLength = parseInt(msgLength);\n    var msg = sliceBuffer(bufferTail, 0, msgLength);\n\n    if (isString) {\n      try {\n        msg = String.fromCharCode.apply(null, new Uint8Array(msg));\n      } catch (e) {\n        // iPhone Safari doesn't let you apply to typed arrays\n        var typed = new Uint8Array(msg);\n        msg = '';\n\n        for (var i = 0; i < typed.length; i++) {\n          msg += String.fromCharCode(typed[i]);\n        }\n      }\n    }\n\n    buffers.push(msg);\n    bufferTail = sliceBuffer(bufferTail, msgLength);\n  }\n\n  var total = buffers.length;\n  buffers.forEach(function (buffer, i) {\n    callback(exports.decodePacket(buffer, binaryType, true), i, total);\n  });\n};","var win;\n\nif (typeof window !== \"undefined\") {\n  win = window;\n} else if (typeof global !== \"undefined\") {\n  win = global;\n} else if (typeof self !== \"undefined\") {\n  win = self;\n} else {\n  win = {};\n}\n\nmodule.exports = win;","/**\n * This is the web browser implementation of `debug()`.\n *\n * Expose `debug()` as the module.\n */\nexports = module.exports = require('./debug');\nexports.log = log;\nexports.formatArgs = formatArgs;\nexports.save = save;\nexports.load = load;\nexports.useColors = useColors;\nexports.storage = 'undefined' != typeof chrome && 'undefined' != typeof chrome.storage ? chrome.storage.local : localstorage();\n/**\n * Colors.\n */\n\nexports.colors = ['#0000CC', '#0000FF', '#0033CC', '#0033FF', '#0066CC', '#0066FF', '#0099CC', '#0099FF', '#00CC00', '#00CC33', '#00CC66', '#00CC99', '#00CCCC', '#00CCFF', '#3300CC', '#3300FF', '#3333CC', '#3333FF', '#3366CC', '#3366FF', '#3399CC', '#3399FF', '#33CC00', '#33CC33', '#33CC66', '#33CC99', '#33CCCC', '#33CCFF', '#6600CC', '#6600FF', '#6633CC', '#6633FF', '#66CC00', '#66CC33', '#9900CC', '#9900FF', '#9933CC', '#9933FF', '#99CC00', '#99CC33', '#CC0000', '#CC0033', '#CC0066', '#CC0099', '#CC00CC', '#CC00FF', '#CC3300', '#CC3333', '#CC3366', '#CC3399', '#CC33CC', '#CC33FF', '#CC6600', '#CC6633', '#CC9900', '#CC9933', '#CCCC00', '#CCCC33', '#FF0000', '#FF0033', '#FF0066', '#FF0099', '#FF00CC', '#FF00FF', '#FF3300', '#FF3333', '#FF3366', '#FF3399', '#FF33CC', '#FF33FF', '#FF6600', '#FF6633', '#FF9900', '#FF9933', '#FFCC00', '#FFCC33'];\n/**\n * Currently only WebKit-based Web Inspectors, Firefox >= v31,\n * and the Firebug extension (any Firefox version) are known\n * to support \"%c\" CSS customizations.\n *\n * TODO: add a `localStorage` variable to explicitly enable/disable colors\n */\n\nfunction useColors() {\n  // NB: In an Electron preload script, document will be defined but not fully\n  // initialized. Since we know we're in Chrome, we'll just detect this case\n  // explicitly\n  if (typeof window !== 'undefined' && window.process && window.process.type === 'renderer') {\n    return true;\n  } // Internet Explorer and Edge do not support colors.\n\n\n  if (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/(edge|trident)\\/(\\d+)/)) {\n    return false;\n  } // is webkit? http://stackoverflow.com/a/16459606/376773\n  // document is undefined in react-native: https://github.com/facebook/react-native/pull/1632\n\n\n  return typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance || // is firebug? http://stackoverflow.com/a/398120/376773\n  typeof window !== 'undefined' && window.console && (window.console.firebug || window.console.exception && window.console.table) || // is firefox >= v31?\n  // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages\n  typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\\/(\\d+)/) && parseInt(RegExp.$1, 10) >= 31 || // double check webkit in userAgent just in case we are in a worker\n  typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\\/(\\d+)/);\n}\n/**\n * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.\n */\n\n\nexports.formatters.j = function (v) {\n  try {\n    return JSON.stringify(v);\n  } catch (err) {\n    return '[UnexpectedJSONParseError]: ' + err.message;\n  }\n};\n/**\n * Colorize log arguments if enabled.\n *\n * @api public\n */\n\n\nfunction formatArgs(args) {\n  var useColors = this.useColors;\n  args[0] = (useColors ? '%c' : '') + this.namespace + (useColors ? ' %c' : ' ') + args[0] + (useColors ? '%c ' : ' ') + '+' + exports.humanize(this.diff);\n  if (!useColors) return;\n  var c = 'color: ' + this.color;\n  args.splice(1, 0, c, 'color: inherit'); // the final \"%c\" is somewhat tricky, because there could be other\n  // arguments passed either before or after the %c, so we need to\n  // figure out the correct index to insert the CSS into\n\n  var index = 0;\n  var lastC = 0;\n  args[0].replace(/%[a-zA-Z%]/g, function (match) {\n    if ('%%' === match) return;\n    index++;\n\n    if ('%c' === match) {\n      // we only are interested in the *last* %c\n      // (the user may have provided their own)\n      lastC = index;\n    }\n  });\n  args.splice(lastC, 0, c);\n}\n/**\n * Invokes `console.log()` when available.\n * No-op when `console.log` is not a \"function\".\n *\n * @api public\n */\n\n\nfunction log() {\n  // this hackery is required for IE8/9, where\n  // the `console.log` function doesn't have 'apply'\n  return 'object' === typeof console && console.log && Function.prototype.apply.call(console.log, console, arguments);\n}\n/**\n * Save `namespaces`.\n *\n * @param {String} namespaces\n * @api private\n */\n\n\nfunction save(namespaces) {\n  try {\n    if (null == namespaces) {\n      exports.storage.removeItem('debug');\n    } else {\n      exports.storage.debug = namespaces;\n    }\n  } catch (e) {}\n}\n/**\n * Load `namespaces`.\n *\n * @return {String} returns the previously persisted debug modes\n * @api private\n */\n\n\nfunction load() {\n  var r;\n\n  try {\n    r = exports.storage.debug;\n  } catch (e) {} // If debug isn't set in LS, and we're in Electron, try to load $DEBUG\n\n\n  if (!r && typeof process !== 'undefined' && 'env' in process) {\n    r = process.env.DEBUG;\n  }\n\n  return r;\n}\n/**\n * Enable namespaces listed in `localStorage.debug` initially.\n */\n\n\nexports.enable(load());\n/**\n * Localstorage attempts to return the localstorage.\n *\n * This is necessary because safari throws\n * when a user disables cookies/localstorage\n * and you attempt to access it.\n *\n * @return {LocalStorage}\n * @api private\n */\n\nfunction localstorage() {\n  try {\n    return window.localStorage;\n  } catch (e) {}\n}","/**\r\n * Compiles a querystring\r\n * Returns string representation of the object\r\n *\r\n * @param {Object}\r\n * @api private\r\n */\nexports.encode = function (obj) {\n  var str = '';\n\n  for (var i in obj) {\n    if (obj.hasOwnProperty(i)) {\n      if (str.length) str += '&';\n      str += encodeURIComponent(i) + '=' + encodeURIComponent(obj[i]);\n    }\n  }\n\n  return str;\n};\n/**\r\n * Parses a simple querystring into an object\r\n *\r\n * @param {String} qs\r\n * @api private\r\n */\n\n\nexports.decode = function (qs) {\n  var qry = {};\n  var pairs = qs.split('&');\n\n  for (var i = 0, l = pairs.length; i < l; i++) {\n    var pair = pairs[i].split('=');\n    qry[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);\n  }\n\n  return qry;\n};","module.exports = function (a, b) {\n  var fn = function fn() {};\n\n  fn.prototype = b.prototype;\n  a.prototype = new fn();\n  a.prototype.constructor = a;\n};","/**\n * This is the web browser implementation of `debug()`.\n *\n * Expose `debug()` as the module.\n */\nexports = module.exports = require('./debug');\nexports.log = log;\nexports.formatArgs = formatArgs;\nexports.save = save;\nexports.load = load;\nexports.useColors = useColors;\nexports.storage = 'undefined' != typeof chrome && 'undefined' != typeof chrome.storage ? chrome.storage.local : localstorage();\n/**\n * Colors.\n */\n\nexports.colors = ['#0000CC', '#0000FF', '#0033CC', '#0033FF', '#0066CC', '#0066FF', '#0099CC', '#0099FF', '#00CC00', '#00CC33', '#00CC66', '#00CC99', '#00CCCC', '#00CCFF', '#3300CC', '#3300FF', '#3333CC', '#3333FF', '#3366CC', '#3366FF', '#3399CC', '#3399FF', '#33CC00', '#33CC33', '#33CC66', '#33CC99', '#33CCCC', '#33CCFF', '#6600CC', '#6600FF', '#6633CC', '#6633FF', '#66CC00', '#66CC33', '#9900CC', '#9900FF', '#9933CC', '#9933FF', '#99CC00', '#99CC33', '#CC0000', '#CC0033', '#CC0066', '#CC0099', '#CC00CC', '#CC00FF', '#CC3300', '#CC3333', '#CC3366', '#CC3399', '#CC33CC', '#CC33FF', '#CC6600', '#CC6633', '#CC9900', '#CC9933', '#CCCC00', '#CCCC33', '#FF0000', '#FF0033', '#FF0066', '#FF0099', '#FF00CC', '#FF00FF', '#FF3300', '#FF3333', '#FF3366', '#FF3399', '#FF33CC', '#FF33FF', '#FF6600', '#FF6633', '#FF9900', '#FF9933', '#FFCC00', '#FFCC33'];\n/**\n * Currently only WebKit-based Web Inspectors, Firefox >= v31,\n * and the Firebug extension (any Firefox version) are known\n * to support \"%c\" CSS customizations.\n *\n * TODO: add a `localStorage` variable to explicitly enable/disable colors\n */\n\nfunction useColors() {\n  // NB: In an Electron preload script, document will be defined but not fully\n  // initialized. Since we know we're in Chrome, we'll just detect this case\n  // explicitly\n  if (typeof window !== 'undefined' && window.process && window.process.type === 'renderer') {\n    return true;\n  } // Internet Explorer and Edge do not support colors.\n\n\n  if (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/(edge|trident)\\/(\\d+)/)) {\n    return false;\n  } // is webkit? http://stackoverflow.com/a/16459606/376773\n  // document is undefined in react-native: https://github.com/facebook/react-native/pull/1632\n\n\n  return typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance || // is firebug? http://stackoverflow.com/a/398120/376773\n  typeof window !== 'undefined' && window.console && (window.console.firebug || window.console.exception && window.console.table) || // is firefox >= v31?\n  // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages\n  typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\\/(\\d+)/) && parseInt(RegExp.$1, 10) >= 31 || // double check webkit in userAgent just in case we are in a worker\n  typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\\/(\\d+)/);\n}\n/**\n * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.\n */\n\n\nexports.formatters.j = function (v) {\n  try {\n    return JSON.stringify(v);\n  } catch (err) {\n    return '[UnexpectedJSONParseError]: ' + err.message;\n  }\n};\n/**\n * Colorize log arguments if enabled.\n *\n * @api public\n */\n\n\nfunction formatArgs(args) {\n  var useColors = this.useColors;\n  args[0] = (useColors ? '%c' : '') + this.namespace + (useColors ? ' %c' : ' ') + args[0] + (useColors ? '%c ' : ' ') + '+' + exports.humanize(this.diff);\n  if (!useColors) return;\n  var c = 'color: ' + this.color;\n  args.splice(1, 0, c, 'color: inherit'); // the final \"%c\" is somewhat tricky, because there could be other\n  // arguments passed either before or after the %c, so we need to\n  // figure out the correct index to insert the CSS into\n\n  var index = 0;\n  var lastC = 0;\n  args[0].replace(/%[a-zA-Z%]/g, function (match) {\n    if ('%%' === match) return;\n    index++;\n\n    if ('%c' === match) {\n      // we only are interested in the *last* %c\n      // (the user may have provided their own)\n      lastC = index;\n    }\n  });\n  args.splice(lastC, 0, c);\n}\n/**\n * Invokes `console.log()` when available.\n * No-op when `console.log` is not a \"function\".\n *\n * @api public\n */\n\n\nfunction log() {\n  // this hackery is required for IE8/9, where\n  // the `console.log` function doesn't have 'apply'\n  return 'object' === typeof console && console.log && Function.prototype.apply.call(console.log, console, arguments);\n}\n/**\n * Save `namespaces`.\n *\n * @param {String} namespaces\n * @api private\n */\n\n\nfunction save(namespaces) {\n  try {\n    if (null == namespaces) {\n      exports.storage.removeItem('debug');\n    } else {\n      exports.storage.debug = namespaces;\n    }\n  } catch (e) {}\n}\n/**\n * Load `namespaces`.\n *\n * @return {String} returns the previously persisted debug modes\n * @api private\n */\n\n\nfunction load() {\n  var r;\n\n  try {\n    r = exports.storage.debug;\n  } catch (e) {} // If debug isn't set in LS, and we're in Electron, try to load $DEBUG\n\n\n  if (!r && typeof process !== 'undefined' && 'env' in process) {\n    r = process.env.DEBUG;\n  }\n\n  return r;\n}\n/**\n * Enable namespaces listed in `localStorage.debug` initially.\n */\n\n\nexports.enable(load());\n/**\n * Localstorage attempts to return the localstorage.\n *\n * This is necessary because safari throws\n * when a user disables cookies/localstorage\n * and you attempt to access it.\n *\n * @return {LocalStorage}\n * @api private\n */\n\nfunction localstorage() {\n  try {\n    return window.localStorage;\n  } catch (e) {}\n}","'use strict';\n\nvar implementation = require('./implementation');\n\nmodule.exports = Function.prototype.bind || implementation;","'use strict';\n\nvar fnToStr = Function.prototype.toString;\nvar constructorRegex = /^\\s*class\\b/;\n\nvar isES6ClassFn = function isES6ClassFunction(value) {\n  try {\n    var fnStr = fnToStr.call(value);\n    return constructorRegex.test(fnStr);\n  } catch (e) {\n    return false; // not a function\n  }\n};\n\nvar tryFunctionObject = function tryFunctionToStr(value) {\n  try {\n    if (isES6ClassFn(value)) {\n      return false;\n    }\n\n    fnToStr.call(value);\n    return true;\n  } catch (e) {\n    return false;\n  }\n};\n\nvar toStr = Object.prototype.toString;\nvar fnClass = '[object Function]';\nvar genClass = '[object GeneratorFunction]';\nvar hasToStringTag = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';\n\nmodule.exports = function isCallable(value) {\n  if (!value) {\n    return false;\n  }\n\n  if (typeof value !== 'function' && typeof value !== 'object') {\n    return false;\n  }\n\n  if (typeof value === 'function' && !value.prototype) {\n    return true;\n  }\n\n  if (hasToStringTag) {\n    return tryFunctionObject(value);\n  }\n\n  if (isES6ClassFn(value)) {\n    return false;\n  }\n\n  var strClass = toStr.call(value);\n  return strClass === fnClass || strClass === genClass;\n};","/**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Utilities to detect basic properties and metadata about MP4s.\n */\n'use strict';\n\nvar toUnsigned = require('../utils/bin').toUnsigned;\n\nvar toHexString = require('../utils/bin').toHexString;\n\nvar _findBox, parseType, timescale, startTime, getVideoTrackIds, getTracks; // Find the data for a box specified by its path\n\n\n_findBox = function findBox(data, path) {\n  var results = [],\n      i,\n      size,\n      type,\n      end,\n      subresults;\n\n  if (!path.length) {\n    // short-circuit the search for empty paths\n    return null;\n  }\n\n  for (i = 0; i < data.byteLength;) {\n    size = toUnsigned(data[i] << 24 | data[i + 1] << 16 | data[i + 2] << 8 | data[i + 3]);\n    type = parseType(data.subarray(i + 4, i + 8));\n    end = size > 1 ? i + size : data.byteLength;\n\n    if (type === path[0]) {\n      if (path.length === 1) {\n        // this is the end of the path and we've found the box we were\n        // looking for\n        results.push(data.subarray(i + 8, end));\n      } else {\n        // recursively search for the next box along the path\n        subresults = _findBox(data.subarray(i + 8, end), path.slice(1));\n\n        if (subresults.length) {\n          results = results.concat(subresults);\n        }\n      }\n    }\n\n    i = end;\n  } // we've finished searching all of data\n\n\n  return results;\n};\n/**\n * Returns the string representation of an ASCII encoded four byte buffer.\n * @param buffer {Uint8Array} a four-byte buffer to translate\n * @return {string} the corresponding string\n */\n\n\nparseType = function parseType(buffer) {\n  var result = '';\n  result += String.fromCharCode(buffer[0]);\n  result += String.fromCharCode(buffer[1]);\n  result += String.fromCharCode(buffer[2]);\n  result += String.fromCharCode(buffer[3]);\n  return result;\n};\n/**\n * Parses an MP4 initialization segment and extracts the timescale\n * values for any declared tracks. Timescale values indicate the\n * number of clock ticks per second to assume for time-based values\n * elsewhere in the MP4.\n *\n * To determine the start time of an MP4, you need two pieces of\n * information: the timescale unit and the earliest base media decode\n * time. Multiple timescales can be specified within an MP4 but the\n * base media decode time is always expressed in the timescale from\n * the media header box for the track:\n * ```\n * moov > trak > mdia > mdhd.timescale\n * ```\n * @param init {Uint8Array} the bytes of the init segment\n * @return {object} a hash of track ids to timescale values or null if\n * the init segment is malformed.\n */\n\n\ntimescale = function timescale(init) {\n  var result = {},\n      traks = _findBox(init, ['moov', 'trak']); // mdhd timescale\n\n\n  return traks.reduce(function (result, trak) {\n    var tkhd, version, index, id, mdhd;\n    tkhd = _findBox(trak, ['tkhd'])[0];\n\n    if (!tkhd) {\n      return null;\n    }\n\n    version = tkhd[0];\n    index = version === 0 ? 12 : 20;\n    id = toUnsigned(tkhd[index] << 24 | tkhd[index + 1] << 16 | tkhd[index + 2] << 8 | tkhd[index + 3]);\n    mdhd = _findBox(trak, ['mdia', 'mdhd'])[0];\n\n    if (!mdhd) {\n      return null;\n    }\n\n    version = mdhd[0];\n    index = version === 0 ? 12 : 20;\n    result[id] = toUnsigned(mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]);\n    return result;\n  }, result);\n};\n/**\n * Determine the base media decode start time, in seconds, for an MP4\n * fragment. If multiple fragments are specified, the earliest time is\n * returned.\n *\n * The base media decode time can be parsed from track fragment\n * metadata:\n * ```\n * moof > traf > tfdt.baseMediaDecodeTime\n * ```\n * It requires the timescale value from the mdhd to interpret.\n *\n * @param timescale {object} a hash of track ids to timescale values.\n * @return {number} the earliest base media decode start time for the\n * fragment, in seconds\n */\n\n\nstartTime = function startTime(timescale, fragment) {\n  var trafs, baseTimes, result; // we need info from two childrend of each track fragment box\n\n  trafs = _findBox(fragment, ['moof', 'traf']); // determine the start times for each track\n\n  baseTimes = [].concat.apply([], trafs.map(function (traf) {\n    return _findBox(traf, ['tfhd']).map(function (tfhd) {\n      var id, scale, baseTime; // get the track id from the tfhd\n\n      id = toUnsigned(tfhd[4] << 24 | tfhd[5] << 16 | tfhd[6] << 8 | tfhd[7]); // assume a 90kHz clock if no timescale was specified\n\n      scale = timescale[id] || 90e3; // get the base media decode time from the tfdt\n\n      baseTime = _findBox(traf, ['tfdt']).map(function (tfdt) {\n        var version, result;\n        version = tfdt[0];\n        result = toUnsigned(tfdt[4] << 24 | tfdt[5] << 16 | tfdt[6] << 8 | tfdt[7]);\n\n        if (version === 1) {\n          result *= Math.pow(2, 32);\n          result += toUnsigned(tfdt[8] << 24 | tfdt[9] << 16 | tfdt[10] << 8 | tfdt[11]);\n        }\n\n        return result;\n      })[0];\n      baseTime = baseTime || Infinity; // convert base time to seconds\n\n      return baseTime / scale;\n    });\n  })); // return the minimum\n\n  result = Math.min.apply(null, baseTimes);\n  return isFinite(result) ? result : 0;\n};\n/**\n  * Find the trackIds of the video tracks in this source.\n  * Found by parsing the Handler Reference and Track Header Boxes:\n  *   moov > trak > mdia > hdlr\n  *   moov > trak > tkhd\n  *\n  * @param {Uint8Array} init - The bytes of the init segment for this source\n  * @return {Number[]} A list of trackIds\n  *\n  * @see ISO-BMFF-12/2015, Section 8.4.3\n **/\n\n\ngetVideoTrackIds = function getVideoTrackIds(init) {\n  var traks = _findBox(init, ['moov', 'trak']);\n\n  var videoTrackIds = [];\n  traks.forEach(function (trak) {\n    var hdlrs = _findBox(trak, ['mdia', 'hdlr']);\n\n    var tkhds = _findBox(trak, ['tkhd']);\n\n    hdlrs.forEach(function (hdlr, index) {\n      var handlerType = parseType(hdlr.subarray(8, 12));\n      var tkhd = tkhds[index];\n      var view;\n      var version;\n      var trackId;\n\n      if (handlerType === 'vide') {\n        view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);\n        version = view.getUint8(0);\n        trackId = version === 0 ? view.getUint32(12) : view.getUint32(20);\n        videoTrackIds.push(trackId);\n      }\n    });\n  });\n  return videoTrackIds;\n};\n/**\n * Get all the video, audio, and hint tracks from a non fragmented\n * mp4 segment\n */\n\n\ngetTracks = function getTracks(init) {\n  var traks = _findBox(init, ['moov', 'trak']);\n\n  var tracks = [];\n  traks.forEach(function (trak) {\n    var track = {};\n\n    var tkhd = _findBox(trak, ['tkhd'])[0];\n\n    var view, version; // id\n\n    if (tkhd) {\n      view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);\n      version = view.getUint8(0);\n      track.id = version === 0 ? view.getUint32(12) : view.getUint32(20);\n    }\n\n    var hdlr = _findBox(trak, ['mdia', 'hdlr'])[0]; // type\n\n\n    if (hdlr) {\n      var type = parseType(hdlr.subarray(8, 12));\n\n      if (type === 'vide') {\n        track.type = 'video';\n      } else if (type === 'soun') {\n        track.type = 'audio';\n      } else {\n        track.type = type;\n      }\n    } // codec\n\n\n    var stsd = _findBox(trak, ['mdia', 'minf', 'stbl', 'stsd'])[0];\n\n    if (stsd) {\n      var sampleDescriptions = stsd.subarray(8); // gives the codec type string\n\n      track.codec = parseType(sampleDescriptions.subarray(4, 8));\n\n      var codecBox = _findBox(sampleDescriptions, [track.codec])[0];\n\n      var codecConfig, codecConfigType;\n\n      if (codecBox) {\n        // https://tools.ietf.org/html/rfc6381#section-3.3\n        if (/^[a-z]vc[1-9]$/i.test(track.codec)) {\n          // we don't need anything but the \"config\" parameter of the\n          // avc1 codecBox\n          codecConfig = codecBox.subarray(78);\n          codecConfigType = parseType(codecConfig.subarray(4, 8));\n\n          if (codecConfigType === 'avcC' && codecConfig.length > 11) {\n            track.codec += '.'; // left padded with zeroes for single digit hex\n            // profile idc\n\n            track.codec += toHexString(codecConfig[9]); // the byte containing the constraint_set flags\n\n            track.codec += toHexString(codecConfig[10]); // level idc\n\n            track.codec += toHexString(codecConfig[11]);\n          } else {\n            // TODO: show a warning that we couldn't parse the codec\n            // and are using the default\n            track.codec = 'avc1.4d400d';\n          }\n        } else if (/^mp4[a,v]$/i.test(track.codec)) {\n          // we do not need anything but the streamDescriptor of the mp4a codecBox\n          codecConfig = codecBox.subarray(28);\n          codecConfigType = parseType(codecConfig.subarray(4, 8));\n\n          if (codecConfigType === 'esds' && codecConfig.length > 20 && codecConfig[19] !== 0) {\n            track.codec += '.' + toHexString(codecConfig[19]); // this value is only a single digit\n\n            track.codec += '.' + toHexString(codecConfig[20] >>> 2 & 0x3f).replace(/^0/, '');\n          } else {\n            // TODO: show a warning that we couldn't parse the codec\n            // and are using the default\n            track.codec = 'mp4a.40.2';\n          }\n        } else {// TODO: show a warning? for unknown codec type\n        }\n      }\n    }\n\n    var mdhd = _findBox(trak, ['mdia', 'mdhd'])[0];\n\n    if (mdhd && tkhd) {\n      var index = version === 0 ? 12 : 20;\n      track.timescale = toUnsigned(mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]);\n    }\n\n    tracks.push(track);\n  });\n  return tracks;\n};\n\nmodule.exports = {\n  findBox: _findBox,\n  parseType: parseType,\n  timescale: timescale,\n  startTime: startTime,\n  videoTrackIds: getVideoTrackIds,\n  tracks: getTracks\n};","/**\n * Helpers.\n */\nvar s = 1000;\nvar m = s * 60;\nvar h = m * 60;\nvar d = h * 24;\nvar y = d * 365.25;\n/**\n * Parse or format the given `val`.\n *\n * Options:\n *\n *  - `long` verbose formatting [false]\n *\n * @param {String|Number} val\n * @param {Object} [options]\n * @throws {Error} throw an error if val is not a non-empty string or a number\n * @return {String|Number}\n * @api public\n */\n\nmodule.exports = function (val, options) {\n  options = options || {};\n  var type = typeof val;\n\n  if (type === 'string' && val.length > 0) {\n    return parse(val);\n  } else if (type === 'number' && isNaN(val) === false) {\n    return options.long ? fmtLong(val) : fmtShort(val);\n  }\n\n  throw new Error('val is not a non-empty string or a valid number. val=' + JSON.stringify(val));\n};\n/**\n * Parse the given `str` and return milliseconds.\n *\n * @param {String} str\n * @return {Number}\n * @api private\n */\n\n\nfunction parse(str) {\n  str = String(str);\n\n  if (str.length > 100) {\n    return;\n  }\n\n  var match = /^((?:\\d+)?\\.?\\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|years?|yrs?|y)?$/i.exec(str);\n\n  if (!match) {\n    return;\n  }\n\n  var n = parseFloat(match[1]);\n  var type = (match[2] || 'ms').toLowerCase();\n\n  switch (type) {\n    case 'years':\n    case 'year':\n    case 'yrs':\n    case 'yr':\n    case 'y':\n      return n * y;\n\n    case 'days':\n    case 'day':\n    case 'd':\n      return n * d;\n\n    case 'hours':\n    case 'hour':\n    case 'hrs':\n    case 'hr':\n    case 'h':\n      return n * h;\n\n    case 'minutes':\n    case 'minute':\n    case 'mins':\n    case 'min':\n    case 'm':\n      return n * m;\n\n    case 'seconds':\n    case 'second':\n    case 'secs':\n    case 'sec':\n    case 's':\n      return n * s;\n\n    case 'milliseconds':\n    case 'millisecond':\n    case 'msecs':\n    case 'msec':\n    case 'ms':\n      return n;\n\n    default:\n      return undefined;\n  }\n}\n/**\n * Short format for `ms`.\n *\n * @param {Number} ms\n * @return {String}\n * @api private\n */\n\n\nfunction fmtShort(ms) {\n  if (ms >= d) {\n    return Math.round(ms / d) + 'd';\n  }\n\n  if (ms >= h) {\n    return Math.round(ms / h) + 'h';\n  }\n\n  if (ms >= m) {\n    return Math.round(ms / m) + 'm';\n  }\n\n  if (ms >= s) {\n    return Math.round(ms / s) + 's';\n  }\n\n  return ms + 'ms';\n}\n/**\n * Long format for `ms`.\n *\n * @param {Number} ms\n * @return {String}\n * @api private\n */\n\n\nfunction fmtLong(ms) {\n  return plural(ms, d, 'day') || plural(ms, h, 'hour') || plural(ms, m, 'minute') || plural(ms, s, 'second') || ms + ' ms';\n}\n/**\n * Pluralization helper.\n */\n\n\nfunction plural(ms, n, name) {\n  if (ms < n) {\n    return;\n  }\n\n  if (ms < n * 1.5) {\n    return Math.floor(ms / n) + ' ' + name;\n  }\n\n  return Math.ceil(ms / n) + ' ' + name + 's';\n}","/**\n * Module dependencies.\n */\nvar debug = require('debug')('socket.io-parser');\n\nvar Emitter = require('component-emitter');\n\nvar binary = require('./binary');\n\nvar isArray = require('isarray');\n\nvar isBuf = require('./is-buffer');\n/**\n * Protocol version.\n *\n * @api public\n */\n\n\nexports.protocol = 4;\n/**\n * Packet types.\n *\n * @api public\n */\n\nexports.types = ['CONNECT', 'DISCONNECT', 'EVENT', 'ACK', 'ERROR', 'BINARY_EVENT', 'BINARY_ACK'];\n/**\n * Packet type `connect`.\n *\n * @api public\n */\n\nexports.CONNECT = 0;\n/**\n * Packet type `disconnect`.\n *\n * @api public\n */\n\nexports.DISCONNECT = 1;\n/**\n * Packet type `event`.\n *\n * @api public\n */\n\nexports.EVENT = 2;\n/**\n * Packet type `ack`.\n *\n * @api public\n */\n\nexports.ACK = 3;\n/**\n * Packet type `error`.\n *\n * @api public\n */\n\nexports.ERROR = 4;\n/**\n * Packet type 'binary event'\n *\n * @api public\n */\n\nexports.BINARY_EVENT = 5;\n/**\n * Packet type `binary ack`. For acks with binary arguments.\n *\n * @api public\n */\n\nexports.BINARY_ACK = 6;\n/**\n * Encoder constructor.\n *\n * @api public\n */\n\nexports.Encoder = Encoder;\n/**\n * Decoder constructor.\n *\n * @api public\n */\n\nexports.Decoder = Decoder;\n/**\n * A socket.io Encoder instance\n *\n * @api public\n */\n\nfunction Encoder() {}\n\nvar ERROR_PACKET = exports.ERROR + '\"encode error\"';\n/**\n * Encode a packet as a single string if non-binary, or as a\n * buffer sequence, depending on packet type.\n *\n * @param {Object} obj - packet object\n * @param {Function} callback - function to handle encodings (likely engine.write)\n * @return Calls callback with Array of encodings\n * @api public\n */\n\nEncoder.prototype.encode = function (obj, callback) {\n  debug('encoding packet %j', obj);\n\n  if (exports.BINARY_EVENT === obj.type || exports.BINARY_ACK === obj.type) {\n    encodeAsBinary(obj, callback);\n  } else {\n    var encoding = encodeAsString(obj);\n    callback([encoding]);\n  }\n};\n/**\n * Encode packet as string.\n *\n * @param {Object} packet\n * @return {String} encoded\n * @api private\n */\n\n\nfunction encodeAsString(obj) {\n  // first is type\n  var str = '' + obj.type; // attachments if we have them\n\n  if (exports.BINARY_EVENT === obj.type || exports.BINARY_ACK === obj.type) {\n    str += obj.attachments + '-';\n  } // if we have a namespace other than `/`\n  // we append it followed by a comma `,`\n\n\n  if (obj.nsp && '/' !== obj.nsp) {\n    str += obj.nsp + ',';\n  } // immediately followed by the id\n\n\n  if (null != obj.id) {\n    str += obj.id;\n  } // json data\n\n\n  if (null != obj.data) {\n    var payload = tryStringify(obj.data);\n\n    if (payload !== false) {\n      str += payload;\n    } else {\n      return ERROR_PACKET;\n    }\n  }\n\n  debug('encoded %j as %s', obj, str);\n  return str;\n}\n\nfunction tryStringify(str) {\n  try {\n    return JSON.stringify(str);\n  } catch (e) {\n    return false;\n  }\n}\n/**\n * Encode packet as 'buffer sequence' by removing blobs, and\n * deconstructing packet into object with placeholders and\n * a list of buffers.\n *\n * @param {Object} packet\n * @return {Buffer} encoded\n * @api private\n */\n\n\nfunction encodeAsBinary(obj, callback) {\n  function writeEncoding(bloblessData) {\n    var deconstruction = binary.deconstructPacket(bloblessData);\n    var pack = encodeAsString(deconstruction.packet);\n    var buffers = deconstruction.buffers;\n    buffers.unshift(pack); // add packet info to beginning of data list\n\n    callback(buffers); // write all the buffers\n  }\n\n  binary.removeBlobs(obj, writeEncoding);\n}\n/**\n * A socket.io Decoder instance\n *\n * @return {Object} decoder\n * @api public\n */\n\n\nfunction Decoder() {\n  this.reconstructor = null;\n}\n/**\n * Mix in `Emitter` with Decoder.\n */\n\n\nEmitter(Decoder.prototype);\n/**\n * Decodes an encoded packet string into packet JSON.\n *\n * @param {String} obj - encoded packet\n * @return {Object} packet\n * @api public\n */\n\nDecoder.prototype.add = function (obj) {\n  var packet;\n\n  if (typeof obj === 'string') {\n    packet = decodeString(obj);\n\n    if (exports.BINARY_EVENT === packet.type || exports.BINARY_ACK === packet.type) {\n      // binary packet's json\n      this.reconstructor = new BinaryReconstructor(packet); // no attachments, labeled binary but no binary data to follow\n\n      if (this.reconstructor.reconPack.attachments === 0) {\n        this.emit('decoded', packet);\n      }\n    } else {\n      // non-binary full packet\n      this.emit('decoded', packet);\n    }\n  } else if (isBuf(obj) || obj.base64) {\n    // raw binary data\n    if (!this.reconstructor) {\n      throw new Error('got binary data when not reconstructing a packet');\n    } else {\n      packet = this.reconstructor.takeBinaryData(obj);\n\n      if (packet) {\n        // received final buffer\n        this.reconstructor = null;\n        this.emit('decoded', packet);\n      }\n    }\n  } else {\n    throw new Error('Unknown type: ' + obj);\n  }\n};\n/**\n * Decode a packet String (JSON data)\n *\n * @param {String} str\n * @return {Object} packet\n * @api private\n */\n\n\nfunction decodeString(str) {\n  var i = 0; // look up type\n\n  var p = {\n    type: Number(str.charAt(0))\n  };\n\n  if (null == exports.types[p.type]) {\n    return error('unknown packet type ' + p.type);\n  } // look up attachments if type binary\n\n\n  if (exports.BINARY_EVENT === p.type || exports.BINARY_ACK === p.type) {\n    var buf = '';\n\n    while (str.charAt(++i) !== '-') {\n      buf += str.charAt(i);\n      if (i == str.length) break;\n    }\n\n    if (buf != Number(buf) || str.charAt(i) !== '-') {\n      throw new Error('Illegal attachments');\n    }\n\n    p.attachments = Number(buf);\n  } // look up namespace (if any)\n\n\n  if ('/' === str.charAt(i + 1)) {\n    p.nsp = '';\n\n    while (++i) {\n      var c = str.charAt(i);\n      if (',' === c) break;\n      p.nsp += c;\n      if (i === str.length) break;\n    }\n  } else {\n    p.nsp = '/';\n  } // look up id\n\n\n  var next = str.charAt(i + 1);\n\n  if ('' !== next && Number(next) == next) {\n    p.id = '';\n\n    while (++i) {\n      var c = str.charAt(i);\n\n      if (null == c || Number(c) != c) {\n        --i;\n        break;\n      }\n\n      p.id += str.charAt(i);\n      if (i === str.length) break;\n    }\n\n    p.id = Number(p.id);\n  } // look up json data\n\n\n  if (str.charAt(++i)) {\n    var payload = tryParse(str.substr(i));\n    var isPayloadValid = payload !== false && (p.type === exports.ERROR || isArray(payload));\n\n    if (isPayloadValid) {\n      p.data = payload;\n    } else {\n      return error('invalid payload');\n    }\n  }\n\n  debug('decoded %s as %j', str, p);\n  return p;\n}\n\nfunction tryParse(str) {\n  try {\n    return JSON.parse(str);\n  } catch (e) {\n    return false;\n  }\n}\n/**\n * Deallocates a parser's resources\n *\n * @api public\n */\n\n\nDecoder.prototype.destroy = function () {\n  if (this.reconstructor) {\n    this.reconstructor.finishedReconstruction();\n  }\n};\n/**\n * A manager of a binary event's 'buffer sequence'. Should\n * be constructed whenever a packet of type BINARY_EVENT is\n * decoded.\n *\n * @param {Object} packet\n * @return {BinaryReconstructor} initialized reconstructor\n * @api private\n */\n\n\nfunction BinaryReconstructor(packet) {\n  this.reconPack = packet;\n  this.buffers = [];\n}\n/**\n * Method to be called when binary data received from connection\n * after a BINARY_EVENT packet.\n *\n * @param {Buffer | ArrayBuffer} binData - the raw binary data received\n * @return {null | Object} returns null if more binary data is expected or\n *   a reconstructed packet object if all buffers have been received.\n * @api private\n */\n\n\nBinaryReconstructor.prototype.takeBinaryData = function (binData) {\n  this.buffers.push(binData);\n\n  if (this.buffers.length === this.reconPack.attachments) {\n    // done with buffer list\n    var packet = binary.reconstructPacket(this.reconPack, this.buffers);\n    this.finishedReconstruction();\n    return packet;\n  }\n\n  return null;\n};\n/**\n * Cleans up binary packet reconstruction variables.\n *\n * @api private\n */\n\n\nBinaryReconstructor.prototype.finishedReconstruction = function () {\n  this.reconPack = null;\n  this.buffers = [];\n};\n\nfunction error(msg) {\n  return {\n    type: exports.ERROR,\n    data: 'parser error: ' + msg\n  };\n}","/*!\n * The buffer module from node.js, for the browser.\n *\n * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>\n * @license  MIT\n */\n\n/* eslint-disable no-proto */\n'use strict';\n\nvar base64 = require('base64-js');\n\nvar ieee754 = require('ieee754');\n\nvar isArray = require('isarray');\n\nexports.Buffer = Buffer;\nexports.SlowBuffer = SlowBuffer;\nexports.INSPECT_MAX_BYTES = 50;\n/**\n * If `Buffer.TYPED_ARRAY_SUPPORT`:\n *   === true    Use Uint8Array implementation (fastest)\n *   === false   Use Object implementation (most compatible, even IE6)\n *\n * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,\n * Opera 11.6+, iOS 4.2+.\n *\n * Due to various browser bugs, sometimes the Object implementation will be used even\n * when the browser supports typed arrays.\n *\n * Note:\n *\n *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,\n *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.\n *\n *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.\n *\n *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of\n *     incorrect length in some situations.\n\n * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they\n * get the Object implementation, which is slower but behaves correctly.\n */\n\nBuffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined ? global.TYPED_ARRAY_SUPPORT : typedArraySupport();\n/*\n * Export kMaxLength after typed array support is determined.\n */\n\nexports.kMaxLength = kMaxLength();\n\nfunction typedArraySupport() {\n  try {\n    var arr = new Uint8Array(1);\n    arr.__proto__ = {\n      __proto__: Uint8Array.prototype,\n      foo: function foo() {\n        return 42;\n      }\n    };\n    return arr.foo() === 42 && // typed array instances can be augmented\n    typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`\n    arr.subarray(1, 1).byteLength === 0; // ie10 has broken `subarray`\n  } catch (e) {\n    return false;\n  }\n}\n\nfunction kMaxLength() {\n  return Buffer.TYPED_ARRAY_SUPPORT ? 0x7fffffff : 0x3fffffff;\n}\n\nfunction createBuffer(that, length) {\n  if (kMaxLength() < length) {\n    throw new RangeError('Invalid typed array length');\n  }\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = new Uint8Array(length);\n    that.__proto__ = Buffer.prototype;\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    if (that === null) {\n      that = new Buffer(length);\n    }\n\n    that.length = length;\n  }\n\n  return that;\n}\n/**\n * The Buffer constructor returns instances of `Uint8Array` that have their\n * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of\n * `Uint8Array`, so the returned instances will have all the node `Buffer` methods\n * and the `Uint8Array` methods. Square bracket notation works as expected -- it\n * returns a single octet.\n *\n * The `Uint8Array` prototype remains unmodified.\n */\n\n\nfunction Buffer(arg, encodingOrOffset, length) {\n  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {\n    return new Buffer(arg, encodingOrOffset, length);\n  } // Common case.\n\n\n  if (typeof arg === 'number') {\n    if (typeof encodingOrOffset === 'string') {\n      throw new Error('If encoding is specified then the first argument must be a string');\n    }\n\n    return allocUnsafe(this, arg);\n  }\n\n  return from(this, arg, encodingOrOffset, length);\n}\n\nBuffer.poolSize = 8192; // not used by this implementation\n// TODO: Legacy, not needed anymore. Remove in next major version.\n\nBuffer._augment = function (arr) {\n  arr.__proto__ = Buffer.prototype;\n  return arr;\n};\n\nfunction from(that, value, encodingOrOffset, length) {\n  if (typeof value === 'number') {\n    throw new TypeError('\"value\" argument must not be a number');\n  }\n\n  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {\n    return fromArrayBuffer(that, value, encodingOrOffset, length);\n  }\n\n  if (typeof value === 'string') {\n    return fromString(that, value, encodingOrOffset);\n  }\n\n  return fromObject(that, value);\n}\n/**\n * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError\n * if value is a number.\n * Buffer.from(str[, encoding])\n * Buffer.from(array)\n * Buffer.from(buffer)\n * Buffer.from(arrayBuffer[, byteOffset[, length]])\n **/\n\n\nBuffer.from = function (value, encodingOrOffset, length) {\n  return from(null, value, encodingOrOffset, length);\n};\n\nif (Buffer.TYPED_ARRAY_SUPPORT) {\n  Buffer.prototype.__proto__ = Uint8Array.prototype;\n  Buffer.__proto__ = Uint8Array;\n\n  if (typeof Symbol !== 'undefined' && Symbol.species && Buffer[Symbol.species] === Buffer) {\n    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97\n    Object.defineProperty(Buffer, Symbol.species, {\n      value: null,\n      configurable: true\n    });\n  }\n}\n\nfunction assertSize(size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('\"size\" argument must be a number');\n  } else if (size < 0) {\n    throw new RangeError('\"size\" argument must not be negative');\n  }\n}\n\nfunction alloc(that, size, fill, encoding) {\n  assertSize(size);\n\n  if (size <= 0) {\n    return createBuffer(that, size);\n  }\n\n  if (fill !== undefined) {\n    // Only pay attention to encoding if it's a string. This\n    // prevents accidentally sending in a number that would\n    // be interpretted as a start offset.\n    return typeof encoding === 'string' ? createBuffer(that, size).fill(fill, encoding) : createBuffer(that, size).fill(fill);\n  }\n\n  return createBuffer(that, size);\n}\n/**\n * Creates a new filled Buffer instance.\n * alloc(size[, fill[, encoding]])\n **/\n\n\nBuffer.alloc = function (size, fill, encoding) {\n  return alloc(null, size, fill, encoding);\n};\n\nfunction allocUnsafe(that, size) {\n  assertSize(size);\n  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0);\n\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    for (var i = 0; i < size; ++i) {\n      that[i] = 0;\n    }\n  }\n\n  return that;\n}\n/**\n * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.\n * */\n\n\nBuffer.allocUnsafe = function (size) {\n  return allocUnsafe(null, size);\n};\n/**\n * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.\n */\n\n\nBuffer.allocUnsafeSlow = function (size) {\n  return allocUnsafe(null, size);\n};\n\nfunction fromString(that, string, encoding) {\n  if (typeof encoding !== 'string' || encoding === '') {\n    encoding = 'utf8';\n  }\n\n  if (!Buffer.isEncoding(encoding)) {\n    throw new TypeError('\"encoding\" must be a valid string encoding');\n  }\n\n  var length = byteLength(string, encoding) | 0;\n  that = createBuffer(that, length);\n  var actual = that.write(string, encoding);\n\n  if (actual !== length) {\n    // Writing a hex string, for example, that contains invalid characters will\n    // cause everything after the first invalid character to be ignored. (e.g.\n    // 'abxxcd' will be treated as 'ab')\n    that = that.slice(0, actual);\n  }\n\n  return that;\n}\n\nfunction fromArrayLike(that, array) {\n  var length = array.length < 0 ? 0 : checked(array.length) | 0;\n  that = createBuffer(that, length);\n\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255;\n  }\n\n  return that;\n}\n\nfunction fromArrayBuffer(that, array, byteOffset, length) {\n  array.byteLength; // this throws if `array` is not a valid ArrayBuffer\n\n  if (byteOffset < 0 || array.byteLength < byteOffset) {\n    throw new RangeError('\\'offset\\' is out of bounds');\n  }\n\n  if (array.byteLength < byteOffset + (length || 0)) {\n    throw new RangeError('\\'length\\' is out of bounds');\n  }\n\n  if (byteOffset === undefined && length === undefined) {\n    array = new Uint8Array(array);\n  } else if (length === undefined) {\n    array = new Uint8Array(array, byteOffset);\n  } else {\n    array = new Uint8Array(array, byteOffset, length);\n  }\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = array;\n    that.__proto__ = Buffer.prototype;\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that = fromArrayLike(that, array);\n  }\n\n  return that;\n}\n\nfunction fromObject(that, obj) {\n  if (Buffer.isBuffer(obj)) {\n    var len = checked(obj.length) | 0;\n    that = createBuffer(that, len);\n\n    if (that.length === 0) {\n      return that;\n    }\n\n    obj.copy(that, 0, 0, len);\n    return that;\n  }\n\n  if (obj) {\n    if (typeof ArrayBuffer !== 'undefined' && obj.buffer instanceof ArrayBuffer || 'length' in obj) {\n      if (typeof obj.length !== 'number' || isnan(obj.length)) {\n        return createBuffer(that, 0);\n      }\n\n      return fromArrayLike(that, obj);\n    }\n\n    if (obj.type === 'Buffer' && isArray(obj.data)) {\n      return fromArrayLike(that, obj.data);\n    }\n  }\n\n  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.');\n}\n\nfunction checked(length) {\n  // Note: cannot use `length < kMaxLength()` here because that fails when\n  // length is NaN (which is otherwise coerced to zero.)\n  if (length >= kMaxLength()) {\n    throw new RangeError('Attempt to allocate Buffer larger than maximum ' + 'size: 0x' + kMaxLength().toString(16) + ' bytes');\n  }\n\n  return length | 0;\n}\n\nfunction SlowBuffer(length) {\n  if (+length != length) {\n    // eslint-disable-line eqeqeq\n    length = 0;\n  }\n\n  return Buffer.alloc(+length);\n}\n\nBuffer.isBuffer = function isBuffer(b) {\n  return !!(b != null && b._isBuffer);\n};\n\nBuffer.compare = function compare(a, b) {\n  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {\n    throw new TypeError('Arguments must be Buffers');\n  }\n\n  if (a === b) return 0;\n  var x = a.length;\n  var y = b.length;\n\n  for (var i = 0, len = Math.min(x, y); i < len; ++i) {\n    if (a[i] !== b[i]) {\n      x = a[i];\n      y = b[i];\n      break;\n    }\n  }\n\n  if (x < y) return -1;\n  if (y < x) return 1;\n  return 0;\n};\n\nBuffer.isEncoding = function isEncoding(encoding) {\n  switch (String(encoding).toLowerCase()) {\n    case 'hex':\n    case 'utf8':\n    case 'utf-8':\n    case 'ascii':\n    case 'latin1':\n    case 'binary':\n    case 'base64':\n    case 'ucs2':\n    case 'ucs-2':\n    case 'utf16le':\n    case 'utf-16le':\n      return true;\n\n    default:\n      return false;\n  }\n};\n\nBuffer.concat = function concat(list, length) {\n  if (!isArray(list)) {\n    throw new TypeError('\"list\" argument must be an Array of Buffers');\n  }\n\n  if (list.length === 0) {\n    return Buffer.alloc(0);\n  }\n\n  var i;\n\n  if (length === undefined) {\n    length = 0;\n\n    for (i = 0; i < list.length; ++i) {\n      length += list[i].length;\n    }\n  }\n\n  var buffer = Buffer.allocUnsafe(length);\n  var pos = 0;\n\n  for (i = 0; i < list.length; ++i) {\n    var buf = list[i];\n\n    if (!Buffer.isBuffer(buf)) {\n      throw new TypeError('\"list\" argument must be an Array of Buffers');\n    }\n\n    buf.copy(buffer, pos);\n    pos += buf.length;\n  }\n\n  return buffer;\n};\n\nfunction byteLength(string, encoding) {\n  if (Buffer.isBuffer(string)) {\n    return string.length;\n  }\n\n  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' && (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {\n    return string.byteLength;\n  }\n\n  if (typeof string !== 'string') {\n    string = '' + string;\n  }\n\n  var len = string.length;\n  if (len === 0) return 0; // Use a for loop to avoid recursion\n\n  var loweredCase = false;\n\n  for (;;) {\n    switch (encoding) {\n      case 'ascii':\n      case 'latin1':\n      case 'binary':\n        return len;\n\n      case 'utf8':\n      case 'utf-8':\n      case undefined:\n        return utf8ToBytes(string).length;\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return len * 2;\n\n      case 'hex':\n        return len >>> 1;\n\n      case 'base64':\n        return base64ToBytes(string).length;\n\n      default:\n        if (loweredCase) return utf8ToBytes(string).length; // assume utf8\n\n        encoding = ('' + encoding).toLowerCase();\n        loweredCase = true;\n    }\n  }\n}\n\nBuffer.byteLength = byteLength;\n\nfunction slowToString(encoding, start, end) {\n  var loweredCase = false; // No need to verify that \"this.length <= MAX_UINT32\" since it's a read-only\n  // property of a typed array.\n  // This behaves neither like String nor Uint8Array in that we set start/end\n  // to their upper/lower bounds if the value passed is out of range.\n  // undefined is handled specially as per ECMA-262 6th Edition,\n  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.\n\n  if (start === undefined || start < 0) {\n    start = 0;\n  } // Return early if start > this.length. Done here to prevent potential uint32\n  // coercion fail below.\n\n\n  if (start > this.length) {\n    return '';\n  }\n\n  if (end === undefined || end > this.length) {\n    end = this.length;\n  }\n\n  if (end <= 0) {\n    return '';\n  } // Force coersion to uint32. This will also coerce falsey/NaN values to 0.\n\n\n  end >>>= 0;\n  start >>>= 0;\n\n  if (end <= start) {\n    return '';\n  }\n\n  if (!encoding) encoding = 'utf8';\n\n  while (true) {\n    switch (encoding) {\n      case 'hex':\n        return hexSlice(this, start, end);\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Slice(this, start, end);\n\n      case 'ascii':\n        return asciiSlice(this, start, end);\n\n      case 'latin1':\n      case 'binary':\n        return latin1Slice(this, start, end);\n\n      case 'base64':\n        return base64Slice(this, start, end);\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return utf16leSlice(this, start, end);\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding);\n        encoding = (encoding + '').toLowerCase();\n        loweredCase = true;\n    }\n  }\n} // The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect\n// Buffer instances.\n\n\nBuffer.prototype._isBuffer = true;\n\nfunction swap(b, n, m) {\n  var i = b[n];\n  b[n] = b[m];\n  b[m] = i;\n}\n\nBuffer.prototype.swap16 = function swap16() {\n  var len = this.length;\n\n  if (len % 2 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 16-bits');\n  }\n\n  for (var i = 0; i < len; i += 2) {\n    swap(this, i, i + 1);\n  }\n\n  return this;\n};\n\nBuffer.prototype.swap32 = function swap32() {\n  var len = this.length;\n\n  if (len % 4 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 32-bits');\n  }\n\n  for (var i = 0; i < len; i += 4) {\n    swap(this, i, i + 3);\n    swap(this, i + 1, i + 2);\n  }\n\n  return this;\n};\n\nBuffer.prototype.swap64 = function swap64() {\n  var len = this.length;\n\n  if (len % 8 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 64-bits');\n  }\n\n  for (var i = 0; i < len; i += 8) {\n    swap(this, i, i + 7);\n    swap(this, i + 1, i + 6);\n    swap(this, i + 2, i + 5);\n    swap(this, i + 3, i + 4);\n  }\n\n  return this;\n};\n\nBuffer.prototype.toString = function toString() {\n  var length = this.length | 0;\n  if (length === 0) return '';\n  if (arguments.length === 0) return utf8Slice(this, 0, length);\n  return slowToString.apply(this, arguments);\n};\n\nBuffer.prototype.equals = function equals(b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer');\n  if (this === b) return true;\n  return Buffer.compare(this, b) === 0;\n};\n\nBuffer.prototype.inspect = function inspect() {\n  var str = '';\n  var max = exports.INSPECT_MAX_BYTES;\n\n  if (this.length > 0) {\n    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ');\n    if (this.length > max) str += ' ... ';\n  }\n\n  return '<Buffer ' + str + '>';\n};\n\nBuffer.prototype.compare = function compare(target, start, end, thisStart, thisEnd) {\n  if (!Buffer.isBuffer(target)) {\n    throw new TypeError('Argument must be a Buffer');\n  }\n\n  if (start === undefined) {\n    start = 0;\n  }\n\n  if (end === undefined) {\n    end = target ? target.length : 0;\n  }\n\n  if (thisStart === undefined) {\n    thisStart = 0;\n  }\n\n  if (thisEnd === undefined) {\n    thisEnd = this.length;\n  }\n\n  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {\n    throw new RangeError('out of range index');\n  }\n\n  if (thisStart >= thisEnd && start >= end) {\n    return 0;\n  }\n\n  if (thisStart >= thisEnd) {\n    return -1;\n  }\n\n  if (start >= end) {\n    return 1;\n  }\n\n  start >>>= 0;\n  end >>>= 0;\n  thisStart >>>= 0;\n  thisEnd >>>= 0;\n  if (this === target) return 0;\n  var x = thisEnd - thisStart;\n  var y = end - start;\n  var len = Math.min(x, y);\n  var thisCopy = this.slice(thisStart, thisEnd);\n  var targetCopy = target.slice(start, end);\n\n  for (var i = 0; i < len; ++i) {\n    if (thisCopy[i] !== targetCopy[i]) {\n      x = thisCopy[i];\n      y = targetCopy[i];\n      break;\n    }\n  }\n\n  if (x < y) return -1;\n  if (y < x) return 1;\n  return 0;\n}; // Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,\n// OR the last index of `val` in `buffer` at offset <= `byteOffset`.\n//\n// Arguments:\n// - buffer - a Buffer to search\n// - val - a string, Buffer, or number\n// - byteOffset - an index into `buffer`; will be clamped to an int32\n// - encoding - an optional encoding, relevant is val is a string\n// - dir - true for indexOf, false for lastIndexOf\n\n\nfunction bidirectionalIndexOf(buffer, val, byteOffset, encoding, dir) {\n  // Empty buffer means no match\n  if (buffer.length === 0) return -1; // Normalize byteOffset\n\n  if (typeof byteOffset === 'string') {\n    encoding = byteOffset;\n    byteOffset = 0;\n  } else if (byteOffset > 0x7fffffff) {\n    byteOffset = 0x7fffffff;\n  } else if (byteOffset < -0x80000000) {\n    byteOffset = -0x80000000;\n  }\n\n  byteOffset = +byteOffset; // Coerce to Number.\n\n  if (isNaN(byteOffset)) {\n    // byteOffset: it it's undefined, null, NaN, \"foo\", etc, search whole buffer\n    byteOffset = dir ? 0 : buffer.length - 1;\n  } // Normalize byteOffset: negative offsets start from the end of the buffer\n\n\n  if (byteOffset < 0) byteOffset = buffer.length + byteOffset;\n\n  if (byteOffset >= buffer.length) {\n    if (dir) return -1;else byteOffset = buffer.length - 1;\n  } else if (byteOffset < 0) {\n    if (dir) byteOffset = 0;else return -1;\n  } // Normalize val\n\n\n  if (typeof val === 'string') {\n    val = Buffer.from(val, encoding);\n  } // Finally, search either indexOf (if dir is true) or lastIndexOf\n\n\n  if (Buffer.isBuffer(val)) {\n    // Special case: looking for empty string/buffer always fails\n    if (val.length === 0) {\n      return -1;\n    }\n\n    return arrayIndexOf(buffer, val, byteOffset, encoding, dir);\n  } else if (typeof val === 'number') {\n    val = val & 0xFF; // Search for a byte value [0-255]\n\n    if (Buffer.TYPED_ARRAY_SUPPORT && typeof Uint8Array.prototype.indexOf === 'function') {\n      if (dir) {\n        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset);\n      } else {\n        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset);\n      }\n    }\n\n    return arrayIndexOf(buffer, [val], byteOffset, encoding, dir);\n  }\n\n  throw new TypeError('val must be string, number or Buffer');\n}\n\nfunction arrayIndexOf(arr, val, byteOffset, encoding, dir) {\n  var indexSize = 1;\n  var arrLength = arr.length;\n  var valLength = val.length;\n\n  if (encoding !== undefined) {\n    encoding = String(encoding).toLowerCase();\n\n    if (encoding === 'ucs2' || encoding === 'ucs-2' || encoding === 'utf16le' || encoding === 'utf-16le') {\n      if (arr.length < 2 || val.length < 2) {\n        return -1;\n      }\n\n      indexSize = 2;\n      arrLength /= 2;\n      valLength /= 2;\n      byteOffset /= 2;\n    }\n  }\n\n  function read(buf, i) {\n    if (indexSize === 1) {\n      return buf[i];\n    } else {\n      return buf.readUInt16BE(i * indexSize);\n    }\n  }\n\n  var i;\n\n  if (dir) {\n    var foundIndex = -1;\n\n    for (i = byteOffset; i < arrLength; i++) {\n      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {\n        if (foundIndex === -1) foundIndex = i;\n        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize;\n      } else {\n        if (foundIndex !== -1) i -= i - foundIndex;\n        foundIndex = -1;\n      }\n    }\n  } else {\n    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength;\n\n    for (i = byteOffset; i >= 0; i--) {\n      var found = true;\n\n      for (var j = 0; j < valLength; j++) {\n        if (read(arr, i + j) !== read(val, j)) {\n          found = false;\n          break;\n        }\n      }\n\n      if (found) return i;\n    }\n  }\n\n  return -1;\n}\n\nBuffer.prototype.includes = function includes(val, byteOffset, encoding) {\n  return this.indexOf(val, byteOffset, encoding) !== -1;\n};\n\nBuffer.prototype.indexOf = function indexOf(val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, true);\n};\n\nBuffer.prototype.lastIndexOf = function lastIndexOf(val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, false);\n};\n\nfunction hexWrite(buf, string, offset, length) {\n  offset = Number(offset) || 0;\n  var remaining = buf.length - offset;\n\n  if (!length) {\n    length = remaining;\n  } else {\n    length = Number(length);\n\n    if (length > remaining) {\n      length = remaining;\n    }\n  } // must be an even number of digits\n\n\n  var strLen = string.length;\n  if (strLen % 2 !== 0) throw new TypeError('Invalid hex string');\n\n  if (length > strLen / 2) {\n    length = strLen / 2;\n  }\n\n  for (var i = 0; i < length; ++i) {\n    var parsed = parseInt(string.substr(i * 2, 2), 16);\n    if (isNaN(parsed)) return i;\n    buf[offset + i] = parsed;\n  }\n\n  return i;\n}\n\nfunction utf8Write(buf, string, offset, length) {\n  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length);\n}\n\nfunction asciiWrite(buf, string, offset, length) {\n  return blitBuffer(asciiToBytes(string), buf, offset, length);\n}\n\nfunction latin1Write(buf, string, offset, length) {\n  return asciiWrite(buf, string, offset, length);\n}\n\nfunction base64Write(buf, string, offset, length) {\n  return blitBuffer(base64ToBytes(string), buf, offset, length);\n}\n\nfunction ucs2Write(buf, string, offset, length) {\n  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length);\n}\n\nBuffer.prototype.write = function write(string, offset, length, encoding) {\n  // Buffer#write(string)\n  if (offset === undefined) {\n    encoding = 'utf8';\n    length = this.length;\n    offset = 0; // Buffer#write(string, encoding)\n  } else if (length === undefined && typeof offset === 'string') {\n    encoding = offset;\n    length = this.length;\n    offset = 0; // Buffer#write(string, offset[, length][, encoding])\n  } else if (isFinite(offset)) {\n    offset = offset | 0;\n\n    if (isFinite(length)) {\n      length = length | 0;\n      if (encoding === undefined) encoding = 'utf8';\n    } else {\n      encoding = length;\n      length = undefined;\n    } // legacy write(string, encoding, offset, length) - remove in v0.13\n\n  } else {\n    throw new Error('Buffer.write(string, encoding, offset[, length]) is no longer supported');\n  }\n\n  var remaining = this.length - offset;\n  if (length === undefined || length > remaining) length = remaining;\n\n  if (string.length > 0 && (length < 0 || offset < 0) || offset > this.length) {\n    throw new RangeError('Attempt to write outside buffer bounds');\n  }\n\n  if (!encoding) encoding = 'utf8';\n  var loweredCase = false;\n\n  for (;;) {\n    switch (encoding) {\n      case 'hex':\n        return hexWrite(this, string, offset, length);\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Write(this, string, offset, length);\n\n      case 'ascii':\n        return asciiWrite(this, string, offset, length);\n\n      case 'latin1':\n      case 'binary':\n        return latin1Write(this, string, offset, length);\n\n      case 'base64':\n        // Warning: maxLength not taken into account in base64Write\n        return base64Write(this, string, offset, length);\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return ucs2Write(this, string, offset, length);\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding);\n        encoding = ('' + encoding).toLowerCase();\n        loweredCase = true;\n    }\n  }\n};\n\nBuffer.prototype.toJSON = function toJSON() {\n  return {\n    type: 'Buffer',\n    data: Array.prototype.slice.call(this._arr || this, 0)\n  };\n};\n\nfunction base64Slice(buf, start, end) {\n  if (start === 0 && end === buf.length) {\n    return base64.fromByteArray(buf);\n  } else {\n    return base64.fromByteArray(buf.slice(start, end));\n  }\n}\n\nfunction utf8Slice(buf, start, end) {\n  end = Math.min(buf.length, end);\n  var res = [];\n  var i = start;\n\n  while (i < end) {\n    var firstByte = buf[i];\n    var codePoint = null;\n    var bytesPerSequence = firstByte > 0xEF ? 4 : firstByte > 0xDF ? 3 : firstByte > 0xBF ? 2 : 1;\n\n    if (i + bytesPerSequence <= end) {\n      var secondByte, thirdByte, fourthByte, tempCodePoint;\n\n      switch (bytesPerSequence) {\n        case 1:\n          if (firstByte < 0x80) {\n            codePoint = firstByte;\n          }\n\n          break;\n\n        case 2:\n          secondByte = buf[i + 1];\n\n          if ((secondByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0x1F) << 0x6 | secondByte & 0x3F;\n\n            if (tempCodePoint > 0x7F) {\n              codePoint = tempCodePoint;\n            }\n          }\n\n          break;\n\n        case 3:\n          secondByte = buf[i + 1];\n          thirdByte = buf[i + 2];\n\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | thirdByte & 0x3F;\n\n            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {\n              codePoint = tempCodePoint;\n            }\n          }\n\n          break;\n\n        case 4:\n          secondByte = buf[i + 1];\n          thirdByte = buf[i + 2];\n          fourthByte = buf[i + 3];\n\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | fourthByte & 0x3F;\n\n            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {\n              codePoint = tempCodePoint;\n            }\n          }\n\n      }\n    }\n\n    if (codePoint === null) {\n      // we did not generate a valid codePoint so insert a\n      // replacement char (U+FFFD) and advance only 1 byte\n      codePoint = 0xFFFD;\n      bytesPerSequence = 1;\n    } else if (codePoint > 0xFFFF) {\n      // encode to utf16 (surrogate pair dance)\n      codePoint -= 0x10000;\n      res.push(codePoint >>> 10 & 0x3FF | 0xD800);\n      codePoint = 0xDC00 | codePoint & 0x3FF;\n    }\n\n    res.push(codePoint);\n    i += bytesPerSequence;\n  }\n\n  return decodeCodePointsArray(res);\n} // Based on http://stackoverflow.com/a/22747272/680742, the browser with\n// the lowest limit is Chrome, with 0x10000 args.\n// We go 1 magnitude less, for safety\n\n\nvar MAX_ARGUMENTS_LENGTH = 0x1000;\n\nfunction decodeCodePointsArray(codePoints) {\n  var len = codePoints.length;\n\n  if (len <= MAX_ARGUMENTS_LENGTH) {\n    return String.fromCharCode.apply(String, codePoints); // avoid extra slice()\n  } // Decode in chunks to avoid \"call stack size exceeded\".\n\n\n  var res = '';\n  var i = 0;\n\n  while (i < len) {\n    res += String.fromCharCode.apply(String, codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH));\n  }\n\n  return res;\n}\n\nfunction asciiSlice(buf, start, end) {\n  var ret = '';\n  end = Math.min(buf.length, end);\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i] & 0x7F);\n  }\n\n  return ret;\n}\n\nfunction latin1Slice(buf, start, end) {\n  var ret = '';\n  end = Math.min(buf.length, end);\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i]);\n  }\n\n  return ret;\n}\n\nfunction hexSlice(buf, start, end) {\n  var len = buf.length;\n  if (!start || start < 0) start = 0;\n  if (!end || end < 0 || end > len) end = len;\n  var out = '';\n\n  for (var i = start; i < end; ++i) {\n    out += toHex(buf[i]);\n  }\n\n  return out;\n}\n\nfunction utf16leSlice(buf, start, end) {\n  var bytes = buf.slice(start, end);\n  var res = '';\n\n  for (var i = 0; i < bytes.length; i += 2) {\n    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256);\n  }\n\n  return res;\n}\n\nBuffer.prototype.slice = function slice(start, end) {\n  var len = this.length;\n  start = ~~start;\n  end = end === undefined ? len : ~~end;\n\n  if (start < 0) {\n    start += len;\n    if (start < 0) start = 0;\n  } else if (start > len) {\n    start = len;\n  }\n\n  if (end < 0) {\n    end += len;\n    if (end < 0) end = 0;\n  } else if (end > len) {\n    end = len;\n  }\n\n  if (end < start) end = start;\n  var newBuf;\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    newBuf = this.subarray(start, end);\n    newBuf.__proto__ = Buffer.prototype;\n  } else {\n    var sliceLen = end - start;\n    newBuf = new Buffer(sliceLen, undefined);\n\n    for (var i = 0; i < sliceLen; ++i) {\n      newBuf[i] = this[i + start];\n    }\n  }\n\n  return newBuf;\n};\n/*\n * Need to make sure that buffer isn't trying to write out of bounds.\n */\n\n\nfunction checkOffset(offset, ext, length) {\n  if (offset % 1 !== 0 || offset < 0) throw new RangeError('offset is not uint');\n  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length');\n}\n\nBuffer.prototype.readUIntLE = function readUIntLE(offset, byteLength, noAssert) {\n  offset = offset | 0;\n  byteLength = byteLength | 0;\n  if (!noAssert) checkOffset(offset, byteLength, this.length);\n  var val = this[offset];\n  var mul = 1;\n  var i = 0;\n\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul;\n  }\n\n  return val;\n};\n\nBuffer.prototype.readUIntBE = function readUIntBE(offset, byteLength, noAssert) {\n  offset = offset | 0;\n  byteLength = byteLength | 0;\n\n  if (!noAssert) {\n    checkOffset(offset, byteLength, this.length);\n  }\n\n  var val = this[offset + --byteLength];\n  var mul = 1;\n\n  while (byteLength > 0 && (mul *= 0x100)) {\n    val += this[offset + --byteLength] * mul;\n  }\n\n  return val;\n};\n\nBuffer.prototype.readUInt8 = function readUInt8(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length);\n  return this[offset];\n};\n\nBuffer.prototype.readUInt16LE = function readUInt16LE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length);\n  return this[offset] | this[offset + 1] << 8;\n};\n\nBuffer.prototype.readUInt16BE = function readUInt16BE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length);\n  return this[offset] << 8 | this[offset + 1];\n};\n\nBuffer.prototype.readUInt32LE = function readUInt32LE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length);\n  return (this[offset] | this[offset + 1] << 8 | this[offset + 2] << 16) + this[offset + 3] * 0x1000000;\n};\n\nBuffer.prototype.readUInt32BE = function readUInt32BE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length);\n  return this[offset] * 0x1000000 + (this[offset + 1] << 16 | this[offset + 2] << 8 | this[offset + 3]);\n};\n\nBuffer.prototype.readIntLE = function readIntLE(offset, byteLength, noAssert) {\n  offset = offset | 0;\n  byteLength = byteLength | 0;\n  if (!noAssert) checkOffset(offset, byteLength, this.length);\n  var val = this[offset];\n  var mul = 1;\n  var i = 0;\n\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul;\n  }\n\n  mul *= 0x80;\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength);\n  return val;\n};\n\nBuffer.prototype.readIntBE = function readIntBE(offset, byteLength, noAssert) {\n  offset = offset | 0;\n  byteLength = byteLength | 0;\n  if (!noAssert) checkOffset(offset, byteLength, this.length);\n  var i = byteLength;\n  var mul = 1;\n  var val = this[offset + --i];\n\n  while (i > 0 && (mul *= 0x100)) {\n    val += this[offset + --i] * mul;\n  }\n\n  mul *= 0x80;\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength);\n  return val;\n};\n\nBuffer.prototype.readInt8 = function readInt8(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length);\n  if (!(this[offset] & 0x80)) return this[offset];\n  return (0xff - this[offset] + 1) * -1;\n};\n\nBuffer.prototype.readInt16LE = function readInt16LE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length);\n  var val = this[offset] | this[offset + 1] << 8;\n  return val & 0x8000 ? val | 0xFFFF0000 : val;\n};\n\nBuffer.prototype.readInt16BE = function readInt16BE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length);\n  var val = this[offset + 1] | this[offset] << 8;\n  return val & 0x8000 ? val | 0xFFFF0000 : val;\n};\n\nBuffer.prototype.readInt32LE = function readInt32LE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length);\n  return this[offset] | this[offset + 1] << 8 | this[offset + 2] << 16 | this[offset + 3] << 24;\n};\n\nBuffer.prototype.readInt32BE = function readInt32BE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length);\n  return this[offset] << 24 | this[offset + 1] << 16 | this[offset + 2] << 8 | this[offset + 3];\n};\n\nBuffer.prototype.readFloatLE = function readFloatLE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length);\n  return ieee754.read(this, offset, true, 23, 4);\n};\n\nBuffer.prototype.readFloatBE = function readFloatBE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length);\n  return ieee754.read(this, offset, false, 23, 4);\n};\n\nBuffer.prototype.readDoubleLE = function readDoubleLE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length);\n  return ieee754.read(this, offset, true, 52, 8);\n};\n\nBuffer.prototype.readDoubleBE = function readDoubleBE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length);\n  return ieee754.read(this, offset, false, 52, 8);\n};\n\nfunction checkInt(buf, value, offset, ext, max, min) {\n  if (!Buffer.isBuffer(buf)) throw new TypeError('\"buffer\" argument must be a Buffer instance');\n  if (value > max || value < min) throw new RangeError('\"value\" argument is out of bounds');\n  if (offset + ext > buf.length) throw new RangeError('Index out of range');\n}\n\nBuffer.prototype.writeUIntLE = function writeUIntLE(value, offset, byteLength, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  byteLength = byteLength | 0;\n\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1;\n    checkInt(this, value, offset, byteLength, maxBytes, 0);\n  }\n\n  var mul = 1;\n  var i = 0;\n  this[offset] = value & 0xFF;\n\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = value / mul & 0xFF;\n  }\n\n  return offset + byteLength;\n};\n\nBuffer.prototype.writeUIntBE = function writeUIntBE(value, offset, byteLength, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  byteLength = byteLength | 0;\n\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1;\n    checkInt(this, value, offset, byteLength, maxBytes, 0);\n  }\n\n  var i = byteLength - 1;\n  var mul = 1;\n  this[offset + i] = value & 0xFF;\n\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = value / mul & 0xFF;\n  }\n\n  return offset + byteLength;\n};\n\nBuffer.prototype.writeUInt8 = function writeUInt8(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0);\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value);\n  this[offset] = value & 0xff;\n  return offset + 1;\n};\n\nfunction objectWriteUInt16(buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffff + value + 1;\n\n  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {\n    buf[offset + i] = (value & 0xff << 8 * (littleEndian ? i : 1 - i)) >>> (littleEndian ? i : 1 - i) * 8;\n  }\n}\n\nBuffer.prototype.writeUInt16LE = function writeUInt16LE(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0);\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = value & 0xff;\n    this[offset + 1] = value >>> 8;\n  } else {\n    objectWriteUInt16(this, value, offset, true);\n  }\n\n  return offset + 2;\n};\n\nBuffer.prototype.writeUInt16BE = function writeUInt16BE(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0);\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = value >>> 8;\n    this[offset + 1] = value & 0xff;\n  } else {\n    objectWriteUInt16(this, value, offset, false);\n  }\n\n  return offset + 2;\n};\n\nfunction objectWriteUInt32(buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffffffff + value + 1;\n\n  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {\n    buf[offset + i] = value >>> (littleEndian ? i : 3 - i) * 8 & 0xff;\n  }\n}\n\nBuffer.prototype.writeUInt32LE = function writeUInt32LE(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0);\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset + 3] = value >>> 24;\n    this[offset + 2] = value >>> 16;\n    this[offset + 1] = value >>> 8;\n    this[offset] = value & 0xff;\n  } else {\n    objectWriteUInt32(this, value, offset, true);\n  }\n\n  return offset + 4;\n};\n\nBuffer.prototype.writeUInt32BE = function writeUInt32BE(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0);\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = value >>> 24;\n    this[offset + 1] = value >>> 16;\n    this[offset + 2] = value >>> 8;\n    this[offset + 3] = value & 0xff;\n  } else {\n    objectWriteUInt32(this, value, offset, false);\n  }\n\n  return offset + 4;\n};\n\nBuffer.prototype.writeIntLE = function writeIntLE(value, offset, byteLength, noAssert) {\n  value = +value;\n  offset = offset | 0;\n\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1);\n    checkInt(this, value, offset, byteLength, limit - 1, -limit);\n  }\n\n  var i = 0;\n  var mul = 1;\n  var sub = 0;\n  this[offset] = value & 0xFF;\n\n  while (++i < byteLength && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {\n      sub = 1;\n    }\n\n    this[offset + i] = (value / mul >> 0) - sub & 0xFF;\n  }\n\n  return offset + byteLength;\n};\n\nBuffer.prototype.writeIntBE = function writeIntBE(value, offset, byteLength, noAssert) {\n  value = +value;\n  offset = offset | 0;\n\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1);\n    checkInt(this, value, offset, byteLength, limit - 1, -limit);\n  }\n\n  var i = byteLength - 1;\n  var mul = 1;\n  var sub = 0;\n  this[offset + i] = value & 0xFF;\n\n  while (--i >= 0 && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {\n      sub = 1;\n    }\n\n    this[offset + i] = (value / mul >> 0) - sub & 0xFF;\n  }\n\n  return offset + byteLength;\n};\n\nBuffer.prototype.writeInt8 = function writeInt8(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80);\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value);\n  if (value < 0) value = 0xff + value + 1;\n  this[offset] = value & 0xff;\n  return offset + 1;\n};\n\nBuffer.prototype.writeInt16LE = function writeInt16LE(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000);\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = value & 0xff;\n    this[offset + 1] = value >>> 8;\n  } else {\n    objectWriteUInt16(this, value, offset, true);\n  }\n\n  return offset + 2;\n};\n\nBuffer.prototype.writeInt16BE = function writeInt16BE(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000);\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = value >>> 8;\n    this[offset + 1] = value & 0xff;\n  } else {\n    objectWriteUInt16(this, value, offset, false);\n  }\n\n  return offset + 2;\n};\n\nBuffer.prototype.writeInt32LE = function writeInt32LE(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000);\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = value & 0xff;\n    this[offset + 1] = value >>> 8;\n    this[offset + 2] = value >>> 16;\n    this[offset + 3] = value >>> 24;\n  } else {\n    objectWriteUInt32(this, value, offset, true);\n  }\n\n  return offset + 4;\n};\n\nBuffer.prototype.writeInt32BE = function writeInt32BE(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000);\n  if (value < 0) value = 0xffffffff + value + 1;\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = value >>> 24;\n    this[offset + 1] = value >>> 16;\n    this[offset + 2] = value >>> 8;\n    this[offset + 3] = value & 0xff;\n  } else {\n    objectWriteUInt32(this, value, offset, false);\n  }\n\n  return offset + 4;\n};\n\nfunction checkIEEE754(buf, value, offset, ext, max, min) {\n  if (offset + ext > buf.length) throw new RangeError('Index out of range');\n  if (offset < 0) throw new RangeError('Index out of range');\n}\n\nfunction writeFloat(buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38);\n  }\n\n  ieee754.write(buf, value, offset, littleEndian, 23, 4);\n  return offset + 4;\n}\n\nBuffer.prototype.writeFloatLE = function writeFloatLE(value, offset, noAssert) {\n  return writeFloat(this, value, offset, true, noAssert);\n};\n\nBuffer.prototype.writeFloatBE = function writeFloatBE(value, offset, noAssert) {\n  return writeFloat(this, value, offset, false, noAssert);\n};\n\nfunction writeDouble(buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308);\n  }\n\n  ieee754.write(buf, value, offset, littleEndian, 52, 8);\n  return offset + 8;\n}\n\nBuffer.prototype.writeDoubleLE = function writeDoubleLE(value, offset, noAssert) {\n  return writeDouble(this, value, offset, true, noAssert);\n};\n\nBuffer.prototype.writeDoubleBE = function writeDoubleBE(value, offset, noAssert) {\n  return writeDouble(this, value, offset, false, noAssert);\n}; // copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)\n\n\nBuffer.prototype.copy = function copy(target, targetStart, start, end) {\n  if (!start) start = 0;\n  if (!end && end !== 0) end = this.length;\n  if (targetStart >= target.length) targetStart = target.length;\n  if (!targetStart) targetStart = 0;\n  if (end > 0 && end < start) end = start; // Copy 0 bytes; we're done\n\n  if (end === start) return 0;\n  if (target.length === 0 || this.length === 0) return 0; // Fatal error conditions\n\n  if (targetStart < 0) {\n    throw new RangeError('targetStart out of bounds');\n  }\n\n  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds');\n  if (end < 0) throw new RangeError('sourceEnd out of bounds'); // Are we oob?\n\n  if (end > this.length) end = this.length;\n\n  if (target.length - targetStart < end - start) {\n    end = target.length - targetStart + start;\n  }\n\n  var len = end - start;\n  var i;\n\n  if (this === target && start < targetStart && targetStart < end) {\n    // descending copy from end\n    for (i = len - 1; i >= 0; --i) {\n      target[i + targetStart] = this[i + start];\n    }\n  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {\n    // ascending copy from start\n    for (i = 0; i < len; ++i) {\n      target[i + targetStart] = this[i + start];\n    }\n  } else {\n    Uint8Array.prototype.set.call(target, this.subarray(start, start + len), targetStart);\n  }\n\n  return len;\n}; // Usage:\n//    buffer.fill(number[, offset[, end]])\n//    buffer.fill(buffer[, offset[, end]])\n//    buffer.fill(string[, offset[, end]][, encoding])\n\n\nBuffer.prototype.fill = function fill(val, start, end, encoding) {\n  // Handle string cases:\n  if (typeof val === 'string') {\n    if (typeof start === 'string') {\n      encoding = start;\n      start = 0;\n      end = this.length;\n    } else if (typeof end === 'string') {\n      encoding = end;\n      end = this.length;\n    }\n\n    if (val.length === 1) {\n      var code = val.charCodeAt(0);\n\n      if (code < 256) {\n        val = code;\n      }\n    }\n\n    if (encoding !== undefined && typeof encoding !== 'string') {\n      throw new TypeError('encoding must be a string');\n    }\n\n    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {\n      throw new TypeError('Unknown encoding: ' + encoding);\n    }\n  } else if (typeof val === 'number') {\n    val = val & 255;\n  } // Invalid ranges are not set to a default, so can range check early.\n\n\n  if (start < 0 || this.length < start || this.length < end) {\n    throw new RangeError('Out of range index');\n  }\n\n  if (end <= start) {\n    return this;\n  }\n\n  start = start >>> 0;\n  end = end === undefined ? this.length : end >>> 0;\n  if (!val) val = 0;\n  var i;\n\n  if (typeof val === 'number') {\n    for (i = start; i < end; ++i) {\n      this[i] = val;\n    }\n  } else {\n    var bytes = Buffer.isBuffer(val) ? val : utf8ToBytes(new Buffer(val, encoding).toString());\n    var len = bytes.length;\n\n    for (i = 0; i < end - start; ++i) {\n      this[i + start] = bytes[i % len];\n    }\n  }\n\n  return this;\n}; // HELPER FUNCTIONS\n// ================\n\n\nvar INVALID_BASE64_RE = /[^+\\/0-9A-Za-z-_]/g;\n\nfunction base64clean(str) {\n  // Node strips out invalid characters like \\n and \\t from the string, base64-js does not\n  str = stringtrim(str).replace(INVALID_BASE64_RE, ''); // Node converts strings with length < 2 to ''\n\n  if (str.length < 2) return ''; // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not\n\n  while (str.length % 4 !== 0) {\n    str = str + '=';\n  }\n\n  return str;\n}\n\nfunction stringtrim(str) {\n  if (str.trim) return str.trim();\n  return str.replace(/^\\s+|\\s+$/g, '');\n}\n\nfunction toHex(n) {\n  if (n < 16) return '0' + n.toString(16);\n  return n.toString(16);\n}\n\nfunction utf8ToBytes(string, units) {\n  units = units || Infinity;\n  var codePoint;\n  var length = string.length;\n  var leadSurrogate = null;\n  var bytes = [];\n\n  for (var i = 0; i < length; ++i) {\n    codePoint = string.charCodeAt(i); // is surrogate component\n\n    if (codePoint > 0xD7FF && codePoint < 0xE000) {\n      // last char was a lead\n      if (!leadSurrogate) {\n        // no lead yet\n        if (codePoint > 0xDBFF) {\n          // unexpected trail\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);\n          continue;\n        } else if (i + 1 === length) {\n          // unpaired lead\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);\n          continue;\n        } // valid lead\n\n\n        leadSurrogate = codePoint;\n        continue;\n      } // 2 leads in a row\n\n\n      if (codePoint < 0xDC00) {\n        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);\n        leadSurrogate = codePoint;\n        continue;\n      } // valid surrogate pair\n\n\n      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000;\n    } else if (leadSurrogate) {\n      // valid bmp char, but last char was a lead\n      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);\n    }\n\n    leadSurrogate = null; // encode utf8\n\n    if (codePoint < 0x80) {\n      if ((units -= 1) < 0) break;\n      bytes.push(codePoint);\n    } else if (codePoint < 0x800) {\n      if ((units -= 2) < 0) break;\n      bytes.push(codePoint >> 0x6 | 0xC0, codePoint & 0x3F | 0x80);\n    } else if (codePoint < 0x10000) {\n      if ((units -= 3) < 0) break;\n      bytes.push(codePoint >> 0xC | 0xE0, codePoint >> 0x6 & 0x3F | 0x80, codePoint & 0x3F | 0x80);\n    } else if (codePoint < 0x110000) {\n      if ((units -= 4) < 0) break;\n      bytes.push(codePoint >> 0x12 | 0xF0, codePoint >> 0xC & 0x3F | 0x80, codePoint >> 0x6 & 0x3F | 0x80, codePoint & 0x3F | 0x80);\n    } else {\n      throw new Error('Invalid code point');\n    }\n  }\n\n  return bytes;\n}\n\nfunction asciiToBytes(str) {\n  var byteArray = [];\n\n  for (var i = 0; i < str.length; ++i) {\n    // Node's code seems to be doing this and not & 0x7F..\n    byteArray.push(str.charCodeAt(i) & 0xFF);\n  }\n\n  return byteArray;\n}\n\nfunction utf16leToBytes(str, units) {\n  var c, hi, lo;\n  var byteArray = [];\n\n  for (var i = 0; i < str.length; ++i) {\n    if ((units -= 2) < 0) break;\n    c = str.charCodeAt(i);\n    hi = c >> 8;\n    lo = c % 256;\n    byteArray.push(lo);\n    byteArray.push(hi);\n  }\n\n  return byteArray;\n}\n\nfunction base64ToBytes(str) {\n  return base64.toByteArray(base64clean(str));\n}\n\nfunction blitBuffer(src, dst, offset, length) {\n  for (var i = 0; i < length; ++i) {\n    if (i + offset >= dst.length || i >= src.length) break;\n    dst[i + offset] = src[i];\n  }\n\n  return i;\n}\n\nfunction isnan(val) {\n  return val !== val; // eslint-disable-line no-self-compare\n}","// browser shim for xmlhttprequest module\nvar hasCORS = require('has-cors');\n\nmodule.exports = function (opts) {\n  var xdomain = opts.xdomain; // scheme must be same when usign XDomainRequest\n  // http://blogs.msdn.com/b/ieinternals/archive/2010/05/13/xdomainrequest-restrictions-limitations-and-workarounds.aspx\n\n  var xscheme = opts.xscheme; // XDomainRequest has a flow of not sending cookie, therefore it should be disabled as a default.\n  // https://github.com/Automattic/engine.io-client/pull/217\n\n  var enablesXDR = opts.enablesXDR; // XMLHttpRequest can be disabled on IE\n\n  try {\n    if ('undefined' !== typeof XMLHttpRequest && (!xdomain || hasCORS)) {\n      return new XMLHttpRequest();\n    }\n  } catch (e) {} // Use XDomainRequest for IE8 if enablesXDR is true\n  // because loading bar keeps flashing when using jsonp-polling\n  // https://github.com/yujiosaka/socke.io-ie8-loading-example\n\n\n  try {\n    if ('undefined' !== typeof XDomainRequest && !xscheme && enablesXDR) {\n      return new XDomainRequest();\n    }\n  } catch (e) {}\n\n  if (!xdomain) {\n    try {\n      return new self[['Active'].concat('Object').join('X')]('Microsoft.XMLHTTP');\n    } catch (e) {}\n  }\n};","/**\n * Module dependencies.\n */\nvar parser = require('engine.io-parser');\n\nvar Emitter = require('component-emitter');\n/**\n * Module exports.\n */\n\n\nmodule.exports = Transport;\n/**\n * Transport abstract constructor.\n *\n * @param {Object} options.\n * @api private\n */\n\nfunction Transport(opts) {\n  this.path = opts.path;\n  this.hostname = opts.hostname;\n  this.port = opts.port;\n  this.secure = opts.secure;\n  this.query = opts.query;\n  this.timestampParam = opts.timestampParam;\n  this.timestampRequests = opts.timestampRequests;\n  this.readyState = '';\n  this.agent = opts.agent || false;\n  this.socket = opts.socket;\n  this.enablesXDR = opts.enablesXDR; // SSL options for Node.js client\n\n  this.pfx = opts.pfx;\n  this.key = opts.key;\n  this.passphrase = opts.passphrase;\n  this.cert = opts.cert;\n  this.ca = opts.ca;\n  this.ciphers = opts.ciphers;\n  this.rejectUnauthorized = opts.rejectUnauthorized;\n  this.forceNode = opts.forceNode; // results of ReactNative environment detection\n\n  this.isReactNative = opts.isReactNative; // other options for Node.js client\n\n  this.extraHeaders = opts.extraHeaders;\n  this.localAddress = opts.localAddress;\n}\n/**\n * Mix in `Emitter`.\n */\n\n\nEmitter(Transport.prototype);\n/**\n * Emits an error.\n *\n * @param {String} str\n * @return {Transport} for chaining\n * @api public\n */\n\nTransport.prototype.onError = function (msg, desc) {\n  var err = new Error(msg);\n  err.type = 'TransportError';\n  err.description = desc;\n  this.emit('error', err);\n  return this;\n};\n/**\n * Opens the transport.\n *\n * @api public\n */\n\n\nTransport.prototype.open = function () {\n  if ('closed' === this.readyState || '' === this.readyState) {\n    this.readyState = 'opening';\n    this.doOpen();\n  }\n\n  return this;\n};\n/**\n * Closes the transport.\n *\n * @api private\n */\n\n\nTransport.prototype.close = function () {\n  if ('opening' === this.readyState || 'open' === this.readyState) {\n    this.doClose();\n    this.onClose();\n  }\n\n  return this;\n};\n/**\n * Sends multiple packets.\n *\n * @param {Array} packets\n * @api private\n */\n\n\nTransport.prototype.send = function (packets) {\n  if ('open' === this.readyState) {\n    this.write(packets);\n  } else {\n    throw new Error('Transport not open');\n  }\n};\n/**\n * Called upon open\n *\n * @api private\n */\n\n\nTransport.prototype.onOpen = function () {\n  this.readyState = 'open';\n  this.writable = true;\n  this.emit('open');\n};\n/**\n * Called with data.\n *\n * @param {String} data\n * @api private\n */\n\n\nTransport.prototype.onData = function (data) {\n  var packet = parser.decodePacket(data, this.socket.binaryType);\n  this.onPacket(packet);\n};\n/**\n * Called with a decoded packet.\n */\n\n\nTransport.prototype.onPacket = function (packet) {\n  this.emit('packet', packet);\n};\n/**\n * Called upon close.\n *\n * @api private\n */\n\n\nTransport.prototype.onClose = function () {\n  this.readyState = 'closed';\n  this.emit('close');\n};","'use strict';\n\nvar keys = require('object-keys');\n\nvar hasSymbols = typeof Symbol === 'function' && typeof Symbol('foo') === 'symbol';\nvar toStr = Object.prototype.toString;\nvar concat = Array.prototype.concat;\nvar origDefineProperty = Object.defineProperty;\n\nvar isFunction = function isFunction(fn) {\n  return typeof fn === 'function' && toStr.call(fn) === '[object Function]';\n};\n\nvar arePropertyDescriptorsSupported = function arePropertyDescriptorsSupported() {\n  var obj = {};\n\n  try {\n    origDefineProperty(obj, 'x', {\n      enumerable: false,\n      value: obj\n    }); // eslint-disable-next-line no-unused-vars, no-restricted-syntax\n\n    for (var _ in obj) {\n      // jscs:ignore disallowUnusedVariables\n      return false;\n    }\n\n    return obj.x === obj;\n  } catch (e) {\n    /* this is IE 8. */\n    return false;\n  }\n};\n\nvar supportsDescriptors = origDefineProperty && arePropertyDescriptorsSupported();\n\nvar defineProperty = function defineProperty(object, name, value, predicate) {\n  if (name in object && (!isFunction(predicate) || !predicate())) {\n    return;\n  }\n\n  if (supportsDescriptors) {\n    origDefineProperty(object, name, {\n      configurable: true,\n      enumerable: false,\n      value: value,\n      writable: true\n    });\n  } else {\n    object[name] = value;\n  }\n};\n\nvar defineProperties = function defineProperties(object, map) {\n  var predicates = arguments.length > 2 ? arguments[2] : {};\n  var props = keys(map);\n\n  if (hasSymbols) {\n    props = concat.call(props, Object.getOwnPropertySymbols(map));\n  }\n\n  for (var i = 0; i < props.length; i += 1) {\n    defineProperty(object, props[i], map[props[i]], predicates[props[i]]);\n  }\n};\n\ndefineProperties.supportsDescriptors = !!supportsDescriptors;\nmodule.exports = defineProperties;","'use strict';\n\nvar toStr = Object.prototype.toString;\n\nmodule.exports = function isArguments(value) {\n  var str = toStr.call(value);\n  var isArgs = str === '[object Arguments]';\n\n  if (!isArgs) {\n    isArgs = str !== '[object Array]' && value !== null && typeof value === 'object' && typeof value.length === 'number' && value.length >= 0 && toStr.call(value.callee) === '[object Function]';\n  }\n\n  return isArgs;\n};","'use strict';\n\nvar bind = require('function-bind');\n\nvar ES = require('es-abstract/es5');\n\nvar replace = bind.call(Function.call, String.prototype.replace);\nvar leftWhitespace = /^[\\x09\\x0A\\x0B\\x0C\\x0D\\x20\\xA0\\u1680\\u180E\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200A\\u202F\\u205F\\u3000\\u2028\\u2029\\uFEFF]+/;\nvar rightWhitespace = /[\\x09\\x0A\\x0B\\x0C\\x0D\\x20\\xA0\\u1680\\u180E\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200A\\u202F\\u205F\\u3000\\u2028\\u2029\\uFEFF]+$/;\n\nmodule.exports = function trim() {\n  var S = ES.ToString(ES.CheckObjectCoercible(this));\n  return replace(replace(S, leftWhitespace, ''), rightWhitespace, '');\n};","'use strict';\n/* globals\n\tSet,\n\tMap,\n\tWeakSet,\n\tWeakMap,\n\n\tPromise,\n\n\tSymbol,\n\tProxy,\n\n\tAtomics,\n\tSharedArrayBuffer,\n\n\tArrayBuffer,\n\tDataView,\n\tUint8Array,\n\tFloat32Array,\n\tFloat64Array,\n\tInt8Array,\n\tInt16Array,\n\tInt32Array,\n\tUint8ClampedArray,\n\tUint16Array,\n\tUint32Array,\n*/\n\nvar undefined; // eslint-disable-line no-shadow-restricted-names\n\nvar ThrowTypeError = Object.getOwnPropertyDescriptor ? function () {\n  return Object.getOwnPropertyDescriptor(arguments, 'callee').get;\n}() : function () {\n  throw new TypeError();\n};\nvar hasSymbols = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol';\n\nvar getProto = Object.getPrototypeOf || function (x) {\n  return x.__proto__;\n}; // eslint-disable-line no-proto\n\n\nvar generator; // = function * () {};\n\nvar generatorFunction = generator ? getProto(generator) : undefined;\nvar asyncFn; // async function() {};\n\nvar asyncFunction = asyncFn ? asyncFn.constructor : undefined;\nvar asyncGen; // async function * () {};\n\nvar asyncGenFunction = asyncGen ? getProto(asyncGen) : undefined;\nvar asyncGenIterator = asyncGen ? asyncGen() : undefined;\nvar TypedArray = typeof Uint8Array === 'undefined' ? undefined : getProto(Uint8Array);\nvar INTRINSICS = {\n  '$ %Array%': Array,\n  '$ %ArrayBuffer%': typeof ArrayBuffer === 'undefined' ? undefined : ArrayBuffer,\n  '$ %ArrayBufferPrototype%': typeof ArrayBuffer === 'undefined' ? undefined : ArrayBuffer.prototype,\n  '$ %ArrayIteratorPrototype%': hasSymbols ? getProto([][Symbol.iterator]()) : undefined,\n  '$ %ArrayPrototype%': Array.prototype,\n  '$ %ArrayProto_entries%': Array.prototype.entries,\n  '$ %ArrayProto_forEach%': Array.prototype.forEach,\n  '$ %ArrayProto_keys%': Array.prototype.keys,\n  '$ %ArrayProto_values%': Array.prototype.values,\n  '$ %AsyncFromSyncIteratorPrototype%': undefined,\n  '$ %AsyncFunction%': asyncFunction,\n  '$ %AsyncFunctionPrototype%': asyncFunction ? asyncFunction.prototype : undefined,\n  '$ %AsyncGenerator%': asyncGen ? getProto(asyncGenIterator) : undefined,\n  '$ %AsyncGeneratorFunction%': asyncGenFunction,\n  '$ %AsyncGeneratorPrototype%': asyncGenFunction ? asyncGenFunction.prototype : undefined,\n  '$ %AsyncIteratorPrototype%': asyncGenIterator && hasSymbols && Symbol.asyncIterator ? asyncGenIterator[Symbol.asyncIterator]() : undefined,\n  '$ %Atomics%': typeof Atomics === 'undefined' ? undefined : Atomics,\n  '$ %Boolean%': Boolean,\n  '$ %BooleanPrototype%': Boolean.prototype,\n  '$ %DataView%': typeof DataView === 'undefined' ? undefined : DataView,\n  '$ %DataViewPrototype%': typeof DataView === 'undefined' ? undefined : DataView.prototype,\n  '$ %Date%': Date,\n  '$ %DatePrototype%': Date.prototype,\n  '$ %decodeURI%': decodeURI,\n  '$ %decodeURIComponent%': decodeURIComponent,\n  '$ %encodeURI%': encodeURI,\n  '$ %encodeURIComponent%': encodeURIComponent,\n  '$ %Error%': Error,\n  '$ %ErrorPrototype%': Error.prototype,\n  '$ %eval%': eval,\n  // eslint-disable-line no-eval\n  '$ %EvalError%': EvalError,\n  '$ %EvalErrorPrototype%': EvalError.prototype,\n  '$ %Float32Array%': typeof Float32Array === 'undefined' ? undefined : Float32Array,\n  '$ %Float32ArrayPrototype%': typeof Float32Array === 'undefined' ? undefined : Float32Array.prototype,\n  '$ %Float64Array%': typeof Float64Array === 'undefined' ? undefined : Float64Array,\n  '$ %Float64ArrayPrototype%': typeof Float64Array === 'undefined' ? undefined : Float64Array.prototype,\n  '$ %Function%': Function,\n  '$ %FunctionPrototype%': Function.prototype,\n  '$ %Generator%': generator ? getProto(generator()) : undefined,\n  '$ %GeneratorFunction%': generatorFunction,\n  '$ %GeneratorPrototype%': generatorFunction ? generatorFunction.prototype : undefined,\n  '$ %Int8Array%': typeof Int8Array === 'undefined' ? undefined : Int8Array,\n  '$ %Int8ArrayPrototype%': typeof Int8Array === 'undefined' ? undefined : Int8Array.prototype,\n  '$ %Int16Array%': typeof Int16Array === 'undefined' ? undefined : Int16Array,\n  '$ %Int16ArrayPrototype%': typeof Int16Array === 'undefined' ? undefined : Int8Array.prototype,\n  '$ %Int32Array%': typeof Int32Array === 'undefined' ? undefined : Int32Array,\n  '$ %Int32ArrayPrototype%': typeof Int32Array === 'undefined' ? undefined : Int32Array.prototype,\n  '$ %isFinite%': isFinite,\n  '$ %isNaN%': isNaN,\n  '$ %IteratorPrototype%': hasSymbols ? getProto(getProto([][Symbol.iterator]())) : undefined,\n  '$ %JSON%': JSON,\n  '$ %JSONParse%': JSON.parse,\n  '$ %Map%': typeof Map === 'undefined' ? undefined : Map,\n  '$ %MapIteratorPrototype%': typeof Map === 'undefined' || !hasSymbols ? undefined : getProto(new Map()[Symbol.iterator]()),\n  '$ %MapPrototype%': typeof Map === 'undefined' ? undefined : Map.prototype,\n  '$ %Math%': Math,\n  '$ %Number%': Number,\n  '$ %NumberPrototype%': Number.prototype,\n  '$ %Object%': Object,\n  '$ %ObjectPrototype%': Object.prototype,\n  '$ %ObjProto_toString%': Object.prototype.toString,\n  '$ %ObjProto_valueOf%': Object.prototype.valueOf,\n  '$ %parseFloat%': parseFloat,\n  '$ %parseInt%': parseInt,\n  '$ %Promise%': typeof Promise === 'undefined' ? undefined : Promise,\n  '$ %PromisePrototype%': typeof Promise === 'undefined' ? undefined : Promise.prototype,\n  '$ %PromiseProto_then%': typeof Promise === 'undefined' ? undefined : Promise.prototype.then,\n  '$ %Promise_all%': typeof Promise === 'undefined' ? undefined : Promise.all,\n  '$ %Promise_reject%': typeof Promise === 'undefined' ? undefined : Promise.reject,\n  '$ %Promise_resolve%': typeof Promise === 'undefined' ? undefined : Promise.resolve,\n  '$ %Proxy%': typeof Proxy === 'undefined' ? undefined : Proxy,\n  '$ %RangeError%': RangeError,\n  '$ %RangeErrorPrototype%': RangeError.prototype,\n  '$ %ReferenceError%': ReferenceError,\n  '$ %ReferenceErrorPrototype%': ReferenceError.prototype,\n  '$ %Reflect%': typeof Reflect === 'undefined' ? undefined : Reflect,\n  '$ %RegExp%': RegExp,\n  '$ %RegExpPrototype%': RegExp.prototype,\n  '$ %Set%': typeof Set === 'undefined' ? undefined : Set,\n  '$ %SetIteratorPrototype%': typeof Set === 'undefined' || !hasSymbols ? undefined : getProto(new Set()[Symbol.iterator]()),\n  '$ %SetPrototype%': typeof Set === 'undefined' ? undefined : Set.prototype,\n  '$ %SharedArrayBuffer%': typeof SharedArrayBuffer === 'undefined' ? undefined : SharedArrayBuffer,\n  '$ %SharedArrayBufferPrototype%': typeof SharedArrayBuffer === 'undefined' ? undefined : SharedArrayBuffer.prototype,\n  '$ %String%': String,\n  '$ %StringIteratorPrototype%': hasSymbols ? getProto(''[Symbol.iterator]()) : undefined,\n  '$ %StringPrototype%': String.prototype,\n  '$ %Symbol%': hasSymbols ? Symbol : undefined,\n  '$ %SymbolPrototype%': hasSymbols ? Symbol.prototype : undefined,\n  '$ %SyntaxError%': SyntaxError,\n  '$ %SyntaxErrorPrototype%': SyntaxError.prototype,\n  '$ %ThrowTypeError%': ThrowTypeError,\n  '$ %TypedArray%': TypedArray,\n  '$ %TypedArrayPrototype%': TypedArray ? TypedArray.prototype : undefined,\n  '$ %TypeError%': TypeError,\n  '$ %TypeErrorPrototype%': TypeError.prototype,\n  '$ %Uint8Array%': typeof Uint8Array === 'undefined' ? undefined : Uint8Array,\n  '$ %Uint8ArrayPrototype%': typeof Uint8Array === 'undefined' ? undefined : Uint8Array.prototype,\n  '$ %Uint8ClampedArray%': typeof Uint8ClampedArray === 'undefined' ? undefined : Uint8ClampedArray,\n  '$ %Uint8ClampedArrayPrototype%': typeof Uint8ClampedArray === 'undefined' ? undefined : Uint8ClampedArray.prototype,\n  '$ %Uint16Array%': typeof Uint16Array === 'undefined' ? undefined : Uint16Array,\n  '$ %Uint16ArrayPrototype%': typeof Uint16Array === 'undefined' ? undefined : Uint16Array.prototype,\n  '$ %Uint32Array%': typeof Uint32Array === 'undefined' ? undefined : Uint32Array,\n  '$ %Uint32ArrayPrototype%': typeof Uint32Array === 'undefined' ? undefined : Uint32Array.prototype,\n  '$ %URIError%': URIError,\n  '$ %URIErrorPrototype%': URIError.prototype,\n  '$ %WeakMap%': typeof WeakMap === 'undefined' ? undefined : WeakMap,\n  '$ %WeakMapPrototype%': typeof WeakMap === 'undefined' ? undefined : WeakMap.prototype,\n  '$ %WeakSet%': typeof WeakSet === 'undefined' ? undefined : WeakSet,\n  '$ %WeakSetPrototype%': typeof WeakSet === 'undefined' ? undefined : WeakSet.prototype\n};\n\nmodule.exports = function GetIntrinsic(name, allowMissing) {\n  if (arguments.length > 1 && typeof allowMissing !== 'boolean') {\n    throw new TypeError('\"allowMissing\" argument must be a boolean');\n  }\n\n  var key = '$ ' + name;\n\n  if (!(key in INTRINSICS)) {\n    throw new SyntaxError('intrinsic ' + name + ' does not exist!');\n  } // istanbul ignore if // hopefully this is impossible to test :-)\n\n\n  if (typeof INTRINSICS[key] === 'undefined' && !allowMissing) {\n    throw new TypeError('intrinsic ' + name + ' exists, but is not available. Please file an issue!');\n  }\n\n  return INTRINSICS[key];\n};","'use strict';\n\nvar bind = require('function-bind');\n\nmodule.exports = bind.call(Function.call, Object.prototype.hasOwnProperty);","'use strict';\n\nvar implementation = require('./implementation');\n\nvar zeroWidthSpace = \"\\u200B\";\n\nmodule.exports = function getPolyfill() {\n  if (String.prototype.trim && zeroWidthSpace.trim() === zeroWidthSpace) {\n    return String.prototype.trim;\n  }\n\n  return implementation;\n};","/**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Parse the internal MP4 structure into an equivalent javascript\n * object.\n */\n'use strict';\n\nvar inspectMp4,\n    _textifyMp,\n    parseType = require('../mp4/probe').parseType,\n    parseMp4Date = function parseMp4Date(seconds) {\n  return new Date(seconds * 1000 - 2082844800000);\n},\n    parseSampleFlags = function parseSampleFlags(flags) {\n  return {\n    isLeading: (flags[0] & 0x0c) >>> 2,\n    dependsOn: flags[0] & 0x03,\n    isDependedOn: (flags[1] & 0xc0) >>> 6,\n    hasRedundancy: (flags[1] & 0x30) >>> 4,\n    paddingValue: (flags[1] & 0x0e) >>> 1,\n    isNonSyncSample: flags[1] & 0x01,\n    degradationPriority: flags[2] << 8 | flags[3]\n  };\n},\n    nalParse = function nalParse(avcStream) {\n  var avcView = new DataView(avcStream.buffer, avcStream.byteOffset, avcStream.byteLength),\n      result = [],\n      i,\n      length;\n\n  for (i = 0; i + 4 < avcStream.length; i += length) {\n    length = avcView.getUint32(i);\n    i += 4; // bail if this doesn't appear to be an H264 stream\n\n    if (length <= 0) {\n      result.push('<span style=\\'color:red;\\'>MALFORMED DATA</span>');\n      continue;\n    }\n\n    switch (avcStream[i] & 0x1F) {\n      case 0x01:\n        result.push('slice_layer_without_partitioning_rbsp');\n        break;\n\n      case 0x05:\n        result.push('slice_layer_without_partitioning_rbsp_idr');\n        break;\n\n      case 0x06:\n        result.push('sei_rbsp');\n        break;\n\n      case 0x07:\n        result.push('seq_parameter_set_rbsp');\n        break;\n\n      case 0x08:\n        result.push('pic_parameter_set_rbsp');\n        break;\n\n      case 0x09:\n        result.push('access_unit_delimiter_rbsp');\n        break;\n\n      default:\n        result.push('UNKNOWN NAL - ' + avcStream[i] & 0x1F);\n        break;\n    }\n  }\n\n  return result;\n},\n    // registry of handlers for individual mp4 box types\nparse = {\n  // codingname, not a first-class box type. stsd entries share the\n  // same format as real boxes so the parsing infrastructure can be\n  // shared\n  avc1: function avc1(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength);\n    return {\n      dataReferenceIndex: view.getUint16(6),\n      width: view.getUint16(24),\n      height: view.getUint16(26),\n      horizresolution: view.getUint16(28) + view.getUint16(30) / 16,\n      vertresolution: view.getUint16(32) + view.getUint16(34) / 16,\n      frameCount: view.getUint16(40),\n      depth: view.getUint16(74),\n      config: inspectMp4(data.subarray(78, data.byteLength))\n    };\n  },\n  avcC: function avcC(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        result = {\n      configurationVersion: data[0],\n      avcProfileIndication: data[1],\n      profileCompatibility: data[2],\n      avcLevelIndication: data[3],\n      lengthSizeMinusOne: data[4] & 0x03,\n      sps: [],\n      pps: []\n    },\n        numOfSequenceParameterSets = data[5] & 0x1f,\n        numOfPictureParameterSets,\n        nalSize,\n        offset,\n        i; // iterate past any SPSs\n\n    offset = 6;\n\n    for (i = 0; i < numOfSequenceParameterSets; i++) {\n      nalSize = view.getUint16(offset);\n      offset += 2;\n      result.sps.push(new Uint8Array(data.subarray(offset, offset + nalSize)));\n      offset += nalSize;\n    } // iterate past any PPSs\n\n\n    numOfPictureParameterSets = data[offset];\n    offset++;\n\n    for (i = 0; i < numOfPictureParameterSets; i++) {\n      nalSize = view.getUint16(offset);\n      offset += 2;\n      result.pps.push(new Uint8Array(data.subarray(offset, offset + nalSize)));\n      offset += nalSize;\n    }\n\n    return result;\n  },\n  btrt: function btrt(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength);\n    return {\n      bufferSizeDB: view.getUint32(0),\n      maxBitrate: view.getUint32(4),\n      avgBitrate: view.getUint32(8)\n    };\n  },\n  esds: function esds(data) {\n    return {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      esId: data[6] << 8 | data[7],\n      streamPriority: data[8] & 0x1f,\n      decoderConfig: {\n        objectProfileIndication: data[11],\n        streamType: data[12] >>> 2 & 0x3f,\n        bufferSize: data[13] << 16 | data[14] << 8 | data[15],\n        maxBitrate: data[16] << 24 | data[17] << 16 | data[18] << 8 | data[19],\n        avgBitrate: data[20] << 24 | data[21] << 16 | data[22] << 8 | data[23],\n        decoderConfigDescriptor: {\n          tag: data[24],\n          length: data[25],\n          audioObjectType: data[26] >>> 3 & 0x1f,\n          samplingFrequencyIndex: (data[26] & 0x07) << 1 | data[27] >>> 7 & 0x01,\n          channelConfiguration: data[27] >>> 3 & 0x0f\n        }\n      }\n    };\n  },\n  ftyp: function ftyp(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        result = {\n      majorBrand: parseType(data.subarray(0, 4)),\n      minorVersion: view.getUint32(4),\n      compatibleBrands: []\n    },\n        i = 8;\n\n    while (i < data.byteLength) {\n      result.compatibleBrands.push(parseType(data.subarray(i, i + 4)));\n      i += 4;\n    }\n\n    return result;\n  },\n  dinf: function dinf(data) {\n    return {\n      boxes: inspectMp4(data)\n    };\n  },\n  dref: function dref(data) {\n    return {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      dataReferences: inspectMp4(data.subarray(8))\n    };\n  },\n  hdlr: function hdlr(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        result = {\n      version: view.getUint8(0),\n      flags: new Uint8Array(data.subarray(1, 4)),\n      handlerType: parseType(data.subarray(8, 12)),\n      name: ''\n    },\n        i = 8; // parse out the name field\n\n    for (i = 24; i < data.byteLength; i++) {\n      if (data[i] === 0x00) {\n        // the name field is null-terminated\n        i++;\n        break;\n      }\n\n      result.name += String.fromCharCode(data[i]);\n    } // decode UTF-8 to javascript's internal representation\n    // see http://ecmanaut.blogspot.com/2006/07/encoding-decoding-utf8-in-javascript.html\n\n\n    result.name = decodeURIComponent(escape(result.name));\n    return result;\n  },\n  mdat: function mdat(data) {\n    return {\n      byteLength: data.byteLength,\n      nals: nalParse(data)\n    };\n  },\n  mdhd: function mdhd(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        i = 4,\n        language,\n        result = {\n      version: view.getUint8(0),\n      flags: new Uint8Array(data.subarray(1, 4)),\n      language: ''\n    };\n\n    if (result.version === 1) {\n      i += 4;\n      result.creationTime = parseMp4Date(view.getUint32(i)); // truncating top 4 bytes\n\n      i += 8;\n      result.modificationTime = parseMp4Date(view.getUint32(i)); // truncating top 4 bytes\n\n      i += 4;\n      result.timescale = view.getUint32(i);\n      i += 8;\n      result.duration = view.getUint32(i); // truncating top 4 bytes\n    } else {\n      result.creationTime = parseMp4Date(view.getUint32(i));\n      i += 4;\n      result.modificationTime = parseMp4Date(view.getUint32(i));\n      i += 4;\n      result.timescale = view.getUint32(i);\n      i += 4;\n      result.duration = view.getUint32(i);\n    }\n\n    i += 4; // language is stored as an ISO-639-2/T code in an array of three 5-bit fields\n    // each field is the packed difference between its ASCII value and 0x60\n\n    language = view.getUint16(i);\n    result.language += String.fromCharCode((language >> 10) + 0x60);\n    result.language += String.fromCharCode(((language & 0x03e0) >> 5) + 0x60);\n    result.language += String.fromCharCode((language & 0x1f) + 0x60);\n    return result;\n  },\n  mdia: function mdia(data) {\n    return {\n      boxes: inspectMp4(data)\n    };\n  },\n  mfhd: function mfhd(data) {\n    return {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      sequenceNumber: data[4] << 24 | data[5] << 16 | data[6] << 8 | data[7]\n    };\n  },\n  minf: function minf(data) {\n    return {\n      boxes: inspectMp4(data)\n    };\n  },\n  // codingname, not a first-class box type. stsd entries share the\n  // same format as real boxes so the parsing infrastructure can be\n  // shared\n  mp4a: function mp4a(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        result = {\n      // 6 bytes reserved\n      dataReferenceIndex: view.getUint16(6),\n      // 4 + 4 bytes reserved\n      channelcount: view.getUint16(16),\n      samplesize: view.getUint16(18),\n      // 2 bytes pre_defined\n      // 2 bytes reserved\n      samplerate: view.getUint16(24) + view.getUint16(26) / 65536\n    }; // if there are more bytes to process, assume this is an ISO/IEC\n    // 14496-14 MP4AudioSampleEntry and parse the ESDBox\n\n    if (data.byteLength > 28) {\n      result.streamDescriptor = inspectMp4(data.subarray(28))[0];\n    }\n\n    return result;\n  },\n  moof: function moof(data) {\n    return {\n      boxes: inspectMp4(data)\n    };\n  },\n  moov: function moov(data) {\n    return {\n      boxes: inspectMp4(data)\n    };\n  },\n  mvex: function mvex(data) {\n    return {\n      boxes: inspectMp4(data)\n    };\n  },\n  mvhd: function mvhd(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        i = 4,\n        result = {\n      version: view.getUint8(0),\n      flags: new Uint8Array(data.subarray(1, 4))\n    };\n\n    if (result.version === 1) {\n      i += 4;\n      result.creationTime = parseMp4Date(view.getUint32(i)); // truncating top 4 bytes\n\n      i += 8;\n      result.modificationTime = parseMp4Date(view.getUint32(i)); // truncating top 4 bytes\n\n      i += 4;\n      result.timescale = view.getUint32(i);\n      i += 8;\n      result.duration = view.getUint32(i); // truncating top 4 bytes\n    } else {\n      result.creationTime = parseMp4Date(view.getUint32(i));\n      i += 4;\n      result.modificationTime = parseMp4Date(view.getUint32(i));\n      i += 4;\n      result.timescale = view.getUint32(i);\n      i += 4;\n      result.duration = view.getUint32(i);\n    }\n\n    i += 4; // convert fixed-point, base 16 back to a number\n\n    result.rate = view.getUint16(i) + view.getUint16(i + 2) / 16;\n    i += 4;\n    result.volume = view.getUint8(i) + view.getUint8(i + 1) / 8;\n    i += 2;\n    i += 2;\n    i += 2 * 4;\n    result.matrix = new Uint32Array(data.subarray(i, i + 9 * 4));\n    i += 9 * 4;\n    i += 6 * 4;\n    result.nextTrackId = view.getUint32(i);\n    return result;\n  },\n  pdin: function pdin(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength);\n    return {\n      version: view.getUint8(0),\n      flags: new Uint8Array(data.subarray(1, 4)),\n      rate: view.getUint32(4),\n      initialDelay: view.getUint32(8)\n    };\n  },\n  sdtp: function sdtp(data) {\n    var result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      samples: []\n    },\n        i;\n\n    for (i = 4; i < data.byteLength; i++) {\n      result.samples.push({\n        dependsOn: (data[i] & 0x30) >> 4,\n        isDependedOn: (data[i] & 0x0c) >> 2,\n        hasRedundancy: data[i] & 0x03\n      });\n    }\n\n    return result;\n  },\n  sidx: function sidx(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      references: [],\n      referenceId: view.getUint32(4),\n      timescale: view.getUint32(8),\n      earliestPresentationTime: view.getUint32(12),\n      firstOffset: view.getUint32(16)\n    },\n        referenceCount = view.getUint16(22),\n        i;\n\n    for (i = 24; referenceCount; i += 12, referenceCount--) {\n      result.references.push({\n        referenceType: (data[i] & 0x80) >>> 7,\n        referencedSize: view.getUint32(i) & 0x7FFFFFFF,\n        subsegmentDuration: view.getUint32(i + 4),\n        startsWithSap: !!(data[i + 8] & 0x80),\n        sapType: (data[i + 8] & 0x70) >>> 4,\n        sapDeltaTime: view.getUint32(i + 8) & 0x0FFFFFFF\n      });\n    }\n\n    return result;\n  },\n  smhd: function smhd(data) {\n    return {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      balance: data[4] + data[5] / 256\n    };\n  },\n  stbl: function stbl(data) {\n    return {\n      boxes: inspectMp4(data)\n    };\n  },\n  stco: function stco(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      chunkOffsets: []\n    },\n        entryCount = view.getUint32(4),\n        i;\n\n    for (i = 8; entryCount; i += 4, entryCount--) {\n      result.chunkOffsets.push(view.getUint32(i));\n    }\n\n    return result;\n  },\n  stsc: function stsc(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        entryCount = view.getUint32(4),\n        result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      sampleToChunks: []\n    },\n        i;\n\n    for (i = 8; entryCount; i += 12, entryCount--) {\n      result.sampleToChunks.push({\n        firstChunk: view.getUint32(i),\n        samplesPerChunk: view.getUint32(i + 4),\n        sampleDescriptionIndex: view.getUint32(i + 8)\n      });\n    }\n\n    return result;\n  },\n  stsd: function stsd(data) {\n    return {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      sampleDescriptions: inspectMp4(data.subarray(8))\n    };\n  },\n  stsz: function stsz(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      sampleSize: view.getUint32(4),\n      entries: []\n    },\n        i;\n\n    for (i = 12; i < data.byteLength; i += 4) {\n      result.entries.push(view.getUint32(i));\n    }\n\n    return result;\n  },\n  stts: function stts(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      timeToSamples: []\n    },\n        entryCount = view.getUint32(4),\n        i;\n\n    for (i = 8; entryCount; i += 8, entryCount--) {\n      result.timeToSamples.push({\n        sampleCount: view.getUint32(i),\n        sampleDelta: view.getUint32(i + 4)\n      });\n    }\n\n    return result;\n  },\n  styp: function styp(data) {\n    return parse.ftyp(data);\n  },\n  tfdt: function tfdt(data) {\n    var result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      baseMediaDecodeTime: data[4] << 24 | data[5] << 16 | data[6] << 8 | data[7]\n    };\n\n    if (result.version === 1) {\n      result.baseMediaDecodeTime *= Math.pow(2, 32);\n      result.baseMediaDecodeTime += data[8] << 24 | data[9] << 16 | data[10] << 8 | data[11];\n    }\n\n    return result;\n  },\n  tfhd: function tfhd(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      trackId: view.getUint32(4)\n    },\n        baseDataOffsetPresent = result.flags[2] & 0x01,\n        sampleDescriptionIndexPresent = result.flags[2] & 0x02,\n        defaultSampleDurationPresent = result.flags[2] & 0x08,\n        defaultSampleSizePresent = result.flags[2] & 0x10,\n        defaultSampleFlagsPresent = result.flags[2] & 0x20,\n        durationIsEmpty = result.flags[0] & 0x010000,\n        defaultBaseIsMoof = result.flags[0] & 0x020000,\n        i;\n    i = 8;\n\n    if (baseDataOffsetPresent) {\n      i += 4; // truncate top 4 bytes\n      // FIXME: should we read the full 64 bits?\n\n      result.baseDataOffset = view.getUint32(12);\n      i += 4;\n    }\n\n    if (sampleDescriptionIndexPresent) {\n      result.sampleDescriptionIndex = view.getUint32(i);\n      i += 4;\n    }\n\n    if (defaultSampleDurationPresent) {\n      result.defaultSampleDuration = view.getUint32(i);\n      i += 4;\n    }\n\n    if (defaultSampleSizePresent) {\n      result.defaultSampleSize = view.getUint32(i);\n      i += 4;\n    }\n\n    if (defaultSampleFlagsPresent) {\n      result.defaultSampleFlags = view.getUint32(i);\n    }\n\n    if (durationIsEmpty) {\n      result.durationIsEmpty = true;\n    }\n\n    if (!baseDataOffsetPresent && defaultBaseIsMoof) {\n      result.baseDataOffsetIsMoof = true;\n    }\n\n    return result;\n  },\n  tkhd: function tkhd(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        i = 4,\n        result = {\n      version: view.getUint8(0),\n      flags: new Uint8Array(data.subarray(1, 4))\n    };\n\n    if (result.version === 1) {\n      i += 4;\n      result.creationTime = parseMp4Date(view.getUint32(i)); // truncating top 4 bytes\n\n      i += 8;\n      result.modificationTime = parseMp4Date(view.getUint32(i)); // truncating top 4 bytes\n\n      i += 4;\n      result.trackId = view.getUint32(i);\n      i += 4;\n      i += 8;\n      result.duration = view.getUint32(i); // truncating top 4 bytes\n    } else {\n      result.creationTime = parseMp4Date(view.getUint32(i));\n      i += 4;\n      result.modificationTime = parseMp4Date(view.getUint32(i));\n      i += 4;\n      result.trackId = view.getUint32(i);\n      i += 4;\n      i += 4;\n      result.duration = view.getUint32(i);\n    }\n\n    i += 4;\n    i += 2 * 4;\n    result.layer = view.getUint16(i);\n    i += 2;\n    result.alternateGroup = view.getUint16(i);\n    i += 2; // convert fixed-point, base 16 back to a number\n\n    result.volume = view.getUint8(i) + view.getUint8(i + 1) / 8;\n    i += 2;\n    i += 2;\n    result.matrix = new Uint32Array(data.subarray(i, i + 9 * 4));\n    i += 9 * 4;\n    result.width = view.getUint16(i) + view.getUint16(i + 2) / 16;\n    i += 4;\n    result.height = view.getUint16(i) + view.getUint16(i + 2) / 16;\n    return result;\n  },\n  traf: function traf(data) {\n    return {\n      boxes: inspectMp4(data)\n    };\n  },\n  trak: function trak(data) {\n    return {\n      boxes: inspectMp4(data)\n    };\n  },\n  trex: function trex(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength);\n    return {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      trackId: view.getUint32(4),\n      defaultSampleDescriptionIndex: view.getUint32(8),\n      defaultSampleDuration: view.getUint32(12),\n      defaultSampleSize: view.getUint32(16),\n      sampleDependsOn: data[20] & 0x03,\n      sampleIsDependedOn: (data[21] & 0xc0) >> 6,\n      sampleHasRedundancy: (data[21] & 0x30) >> 4,\n      samplePaddingValue: (data[21] & 0x0e) >> 1,\n      sampleIsDifferenceSample: !!(data[21] & 0x01),\n      sampleDegradationPriority: view.getUint16(22)\n    };\n  },\n  trun: function trun(data) {\n    var result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      samples: []\n    },\n        view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        // Flag interpretation\n    dataOffsetPresent = result.flags[2] & 0x01,\n        // compare with 2nd byte of 0x1\n    firstSampleFlagsPresent = result.flags[2] & 0x04,\n        // compare with 2nd byte of 0x4\n    sampleDurationPresent = result.flags[1] & 0x01,\n        // compare with 2nd byte of 0x100\n    sampleSizePresent = result.flags[1] & 0x02,\n        // compare with 2nd byte of 0x200\n    sampleFlagsPresent = result.flags[1] & 0x04,\n        // compare with 2nd byte of 0x400\n    sampleCompositionTimeOffsetPresent = result.flags[1] & 0x08,\n        // compare with 2nd byte of 0x800\n    sampleCount = view.getUint32(4),\n        offset = 8,\n        sample;\n\n    if (dataOffsetPresent) {\n      // 32 bit signed integer\n      result.dataOffset = view.getInt32(offset);\n      offset += 4;\n    } // Overrides the flags for the first sample only. The order of\n    // optional values will be: duration, size, compositionTimeOffset\n\n\n    if (firstSampleFlagsPresent && sampleCount) {\n      sample = {\n        flags: parseSampleFlags(data.subarray(offset, offset + 4))\n      };\n      offset += 4;\n\n      if (sampleDurationPresent) {\n        sample.duration = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleSizePresent) {\n        sample.size = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleCompositionTimeOffsetPresent) {\n        // Note: this should be a signed int if version is 1\n        sample.compositionTimeOffset = view.getUint32(offset);\n        offset += 4;\n      }\n\n      result.samples.push(sample);\n      sampleCount--;\n    }\n\n    while (sampleCount--) {\n      sample = {};\n\n      if (sampleDurationPresent) {\n        sample.duration = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleSizePresent) {\n        sample.size = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleFlagsPresent) {\n        sample.flags = parseSampleFlags(data.subarray(offset, offset + 4));\n        offset += 4;\n      }\n\n      if (sampleCompositionTimeOffsetPresent) {\n        // Note: this should be a signed int if version is 1\n        sample.compositionTimeOffset = view.getUint32(offset);\n        offset += 4;\n      }\n\n      result.samples.push(sample);\n    }\n\n    return result;\n  },\n  'url ': function url(data) {\n    return {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4))\n    };\n  },\n  vmhd: function vmhd(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength);\n    return {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      graphicsmode: view.getUint16(4),\n      opcolor: new Uint16Array([view.getUint16(6), view.getUint16(8), view.getUint16(10)])\n    };\n  }\n};\n/**\n * Return a javascript array of box objects parsed from an ISO base\n * media file.\n * @param data {Uint8Array} the binary data of the media to be inspected\n * @return {array} a javascript array of potentially nested box objects\n */\n\n\ninspectMp4 = function inspectMp4(data) {\n  var i = 0,\n      result = [],\n      view,\n      size,\n      type,\n      end,\n      box; // Convert data from Uint8Array to ArrayBuffer, to follow Dataview API\n\n  var ab = new ArrayBuffer(data.length);\n  var v = new Uint8Array(ab);\n\n  for (var z = 0; z < data.length; ++z) {\n    v[z] = data[z];\n  }\n\n  view = new DataView(ab);\n\n  while (i < data.byteLength) {\n    // parse box data\n    size = view.getUint32(i);\n    type = parseType(data.subarray(i + 4, i + 8));\n    end = size > 1 ? i + size : data.byteLength; // parse type-specific data\n\n    box = (parse[type] || function (data) {\n      return {\n        data: data\n      };\n    })(data.subarray(i + 8, end));\n\n    box.size = size;\n    box.type = type; // store this box and move to the next\n\n    result.push(box);\n    i = end;\n  }\n\n  return result;\n};\n/**\n * Returns a textual representation of the javascript represtentation\n * of an MP4 file. You can use it as an alternative to\n * JSON.stringify() to compare inspected MP4s.\n * @param inspectedMp4 {array} the parsed array of boxes in an MP4\n * file\n * @param depth {number} (optional) the number of ancestor boxes of\n * the elements of inspectedMp4. Assumed to be zero if unspecified.\n * @return {string} a text representation of the parsed MP4\n */\n\n\n_textifyMp = function textifyMp4(inspectedMp4, depth) {\n  var indent;\n  depth = depth || 0;\n  indent = new Array(depth * 2 + 1).join(' '); // iterate over all the boxes\n\n  return inspectedMp4.map(function (box, index) {\n    // list the box type first at the current indentation level\n    return indent + box.type + '\\n' + // the type is already included and handle child boxes separately\n    Object.keys(box).filter(function (key) {\n      return key !== 'type' && key !== 'boxes'; // output all the box properties\n    }).map(function (key) {\n      var prefix = indent + '  ' + key + ': ',\n          value = box[key]; // print out raw bytes as hexademical\n\n      if (value instanceof Uint8Array || value instanceof Uint32Array) {\n        var bytes = Array.prototype.slice.call(new Uint8Array(value.buffer, value.byteOffset, value.byteLength)).map(function (byte) {\n          return ' ' + ('00' + byte.toString(16)).slice(-2);\n        }).join('').match(/.{1,24}/g);\n\n        if (!bytes) {\n          return prefix + '<>';\n        }\n\n        if (bytes.length === 1) {\n          return prefix + '<' + bytes.join('').slice(1) + '>';\n        }\n\n        return prefix + '<\\n' + bytes.map(function (line) {\n          return indent + '  ' + line;\n        }).join('\\n') + '\\n' + indent + '  >';\n      } // stringify generic objects\n\n\n      return prefix + JSON.stringify(value, null, 2).split('\\n').map(function (line, index) {\n        if (index === 0) {\n          return line;\n        }\n\n        return indent + '  ' + line;\n      }).join('\\n');\n    }).join('\\n') + ( // recursively textify the child boxes\n    box.boxes ? '\\n' + _textifyMp(box.boxes, depth + 1) : '');\n  }).join('\\n');\n};\n\nmodule.exports = {\n  inspect: inspectMp4,\n  textify: _textifyMp,\n  parseTfdt: parse.tfdt,\n  parseHdlr: parse.hdlr,\n  parseTfhd: parse.tfhd,\n  parseTrun: parse.trun,\n  parseSidx: parse.sidx\n};","/**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n */\nvar toUnsigned = function toUnsigned(value) {\n  return value >>> 0;\n};\n\nvar toHexString = function toHexString(value) {\n  return ('00' + value.toString(16)).slice(-2);\n};\n\nmodule.exports = {\n  toUnsigned: toUnsigned,\n  toHexString: toHexString\n};","/**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Reads in-band caption information from a video elementary\n * stream. Captions must follow the CEA-708 standard for injection\n * into an MPEG-2 transport streams.\n * @see https://en.wikipedia.org/wiki/CEA-708\n * @see https://www.gpo.gov/fdsys/pkg/CFR-2007-title47-vol1/pdf/CFR-2007-title47-vol1-sec15-119.pdf\n */\n'use strict'; // Supplemental enhancement information (SEI) NAL units have a\n// payload type field to indicate how they are to be\n// interpreted. CEAS-708 caption content is always transmitted with\n// payload type 0x04.\n\nvar USER_DATA_REGISTERED_ITU_T_T35 = 4,\n    RBSP_TRAILING_BITS = 128;\n/**\n  * Parse a supplemental enhancement information (SEI) NAL unit.\n  * Stops parsing once a message of type ITU T T35 has been found.\n  *\n  * @param bytes {Uint8Array} the bytes of a SEI NAL unit\n  * @return {object} the parsed SEI payload\n  * @see Rec. ITU-T H.264, 7.3.2.3.1\n  */\n\nvar parseSei = function parseSei(bytes) {\n  var i = 0,\n      result = {\n    payloadType: -1,\n    payloadSize: 0\n  },\n      payloadType = 0,\n      payloadSize = 0; // go through the sei_rbsp parsing each each individual sei_message\n\n  while (i < bytes.byteLength) {\n    // stop once we have hit the end of the sei_rbsp\n    if (bytes[i] === RBSP_TRAILING_BITS) {\n      break;\n    } // Parse payload type\n\n\n    while (bytes[i] === 0xFF) {\n      payloadType += 255;\n      i++;\n    }\n\n    payloadType += bytes[i++]; // Parse payload size\n\n    while (bytes[i] === 0xFF) {\n      payloadSize += 255;\n      i++;\n    }\n\n    payloadSize += bytes[i++]; // this sei_message is a 608/708 caption so save it and break\n    // there can only ever be one caption message in a frame's sei\n\n    if (!result.payload && payloadType === USER_DATA_REGISTERED_ITU_T_T35) {\n      result.payloadType = payloadType;\n      result.payloadSize = payloadSize;\n      result.payload = bytes.subarray(i, i + payloadSize);\n      break;\n    } // skip the payload and parse the next message\n\n\n    i += payloadSize;\n    payloadType = 0;\n    payloadSize = 0;\n  }\n\n  return result;\n}; // see ANSI/SCTE 128-1 (2013), section 8.1\n\n\nvar parseUserData = function parseUserData(sei) {\n  // itu_t_t35_contry_code must be 181 (United States) for\n  // captions\n  if (sei.payload[0] !== 181) {\n    return null;\n  } // itu_t_t35_provider_code should be 49 (ATSC) for captions\n\n\n  if ((sei.payload[1] << 8 | sei.payload[2]) !== 49) {\n    return null;\n  } // the user_identifier should be \"GA94\" to indicate ATSC1 data\n\n\n  if (String.fromCharCode(sei.payload[3], sei.payload[4], sei.payload[5], sei.payload[6]) !== 'GA94') {\n    return null;\n  } // finally, user_data_type_code should be 0x03 for caption data\n\n\n  if (sei.payload[7] !== 0x03) {\n    return null;\n  } // return the user_data_type_structure and strip the trailing\n  // marker bits\n\n\n  return sei.payload.subarray(8, sei.payload.length - 1);\n}; // see CEA-708-D, section 4.4\n\n\nvar parseCaptionPackets = function parseCaptionPackets(pts, userData) {\n  var results = [],\n      i,\n      count,\n      offset,\n      data; // if this is just filler, return immediately\n\n  if (!(userData[0] & 0x40)) {\n    return results;\n  } // parse out the cc_data_1 and cc_data_2 fields\n\n\n  count = userData[0] & 0x1f;\n\n  for (i = 0; i < count; i++) {\n    offset = i * 3;\n    data = {\n      type: userData[offset + 2] & 0x03,\n      pts: pts\n    }; // capture cc data when cc_valid is 1\n\n    if (userData[offset + 2] & 0x04) {\n      data.ccData = userData[offset + 3] << 8 | userData[offset + 4];\n      results.push(data);\n    }\n  }\n\n  return results;\n};\n\nvar discardEmulationPreventionBytes = function discardEmulationPreventionBytes(data) {\n  var length = data.byteLength,\n      emulationPreventionBytesPositions = [],\n      i = 1,\n      newLength,\n      newData; // Find all `Emulation Prevention Bytes`\n\n  while (i < length - 2) {\n    if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {\n      emulationPreventionBytesPositions.push(i + 2);\n      i += 2;\n    } else {\n      i++;\n    }\n  } // If no Emulation Prevention Bytes were found just return the original\n  // array\n\n\n  if (emulationPreventionBytesPositions.length === 0) {\n    return data;\n  } // Create a new array to hold the NAL unit data\n\n\n  newLength = length - emulationPreventionBytesPositions.length;\n  newData = new Uint8Array(newLength);\n  var sourceIndex = 0;\n\n  for (i = 0; i < newLength; sourceIndex++, i++) {\n    if (sourceIndex === emulationPreventionBytesPositions[0]) {\n      // Skip this byte\n      sourceIndex++; // Remove this position index\n\n      emulationPreventionBytesPositions.shift();\n    }\n\n    newData[i] = data[sourceIndex];\n  }\n\n  return newData;\n}; // exports\n\n\nmodule.exports = {\n  parseSei: parseSei,\n  parseUserData: parseUserData,\n  parseCaptionPackets: parseCaptionPackets,\n  discardEmulationPreventionBytes: discardEmulationPreventionBytes,\n  USER_DATA_REGISTERED_ITU_T_T35: USER_DATA_REGISTERED_ITU_T_T35\n};","/**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * A lightweight readable stream implemention that handles event dispatching.\n * Objects that inherit from streams should call init in their constructors.\n */\n'use strict';\n\nvar Stream = function Stream() {\n  this.init = function () {\n    var listeners = {};\n    /**\n     * Add a listener for a specified event type.\n     * @param type {string} the event name\n     * @param listener {function} the callback to be invoked when an event of\n     * the specified type occurs\n     */\n\n    this.on = function (type, listener) {\n      if (!listeners[type]) {\n        listeners[type] = [];\n      }\n\n      listeners[type] = listeners[type].concat(listener);\n    };\n    /**\n     * Remove a listener for a specified event type.\n     * @param type {string} the event name\n     * @param listener {function} a function previously registered for this\n     * type of event through `on`\n     */\n\n\n    this.off = function (type, listener) {\n      var index;\n\n      if (!listeners[type]) {\n        return false;\n      }\n\n      index = listeners[type].indexOf(listener);\n      listeners[type] = listeners[type].slice();\n      listeners[type].splice(index, 1);\n      return index > -1;\n    };\n    /**\n     * Trigger an event of the specified type on this stream. Any additional\n     * arguments to this function are passed as parameters to event listeners.\n     * @param type {string} the event name\n     */\n\n\n    this.trigger = function (type) {\n      var callbacks, i, length, args;\n      callbacks = listeners[type];\n\n      if (!callbacks) {\n        return;\n      } // Slicing the arguments on every invocation of this method\n      // can add a significant amount of overhead. Avoid the\n      // intermediate object creation for the common case of a\n      // single callback argument\n\n\n      if (arguments.length === 2) {\n        length = callbacks.length;\n\n        for (i = 0; i < length; ++i) {\n          callbacks[i].call(this, arguments[1]);\n        }\n      } else {\n        args = [];\n        i = arguments.length;\n\n        for (i = 1; i < arguments.length; ++i) {\n          args.push(arguments[i]);\n        }\n\n        length = callbacks.length;\n\n        for (i = 0; i < length; ++i) {\n          callbacks[i].apply(this, args);\n        }\n      }\n    };\n    /**\n     * Destroys the stream and cleans up.\n     */\n\n\n    this.dispose = function () {\n      listeners = {};\n    };\n  };\n};\n/**\n * Forwards all `data` events on this stream to the destination stream. The\n * destination stream should provide a method `push` to receive the data\n * events as they arrive.\n * @param destination {stream} the stream that will receive all `data` events\n * @param autoFlush {boolean} if false, we will not call `flush` on the destination\n *                            when the current stream emits a 'done' event\n * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n */\n\n\nStream.prototype.pipe = function (destination) {\n  this.on('data', function (data) {\n    destination.push(data);\n  });\n  this.on('done', function (flushSource) {\n    destination.flush(flushSource);\n  });\n  this.on('partialdone', function (flushSource) {\n    destination.partialFlush(flushSource);\n  });\n  this.on('endedtimeline', function (flushSource) {\n    destination.endTimeline(flushSource);\n  });\n  this.on('reset', function (flushSource) {\n    destination.reset(flushSource);\n  });\n  return destination;\n}; // Default stream functions that are expected to be overridden to perform\n// actual work. These are provided by the prototype as a sort of no-op\n// implementation so that we don't have to check for their existence in the\n// `pipe` function above.\n\n\nStream.prototype.push = function (data) {\n  this.trigger('data', data);\n};\n\nStream.prototype.flush = function (flushSource) {\n  this.trigger('done', flushSource);\n};\n\nStream.prototype.partialFlush = function (flushSource) {\n  this.trigger('partialdone', flushSource);\n};\n\nStream.prototype.endTimeline = function (flushSource) {\n  this.trigger('endedtimeline', flushSource);\n};\n\nStream.prototype.reset = function (flushSource) {\n  this.trigger('reset', flushSource);\n};\n\nmodule.exports = Stream;","/**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n */\n'use strict';\n\nmodule.exports = {\n  H264_STREAM_TYPE: 0x1B,\n  ADTS_STREAM_TYPE: 0x0F,\n  METADATA_STREAM_TYPE: 0x15\n};","/**\r\n * Parses an URI\r\n *\r\n * @author Steven Levithan <stevenlevithan.com> (MIT license)\r\n * @api private\r\n */\nvar re = /^(?:(?![^:@]+:[^:@\\/]*@)(http|https|ws|wss):\\/\\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\\/?#]*)(?::(\\d*))?)(((\\/(?:[^?#](?![^?#\\/]*\\.[^?#\\/.]+(?:[?#]|$)))*\\/?)?([^?#\\/]*))(?:\\?([^#]*))?(?:#(.*))?)/;\nvar parts = ['source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host', 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'];\n\nmodule.exports = function parseuri(str) {\n  var src = str,\n      b = str.indexOf('['),\n      e = str.indexOf(']');\n\n  if (b != -1 && e != -1) {\n    str = str.substring(0, b) + str.substring(b, e).replace(/:/g, ';') + str.substring(e, str.length);\n  }\n\n  var m = re.exec(str || ''),\n      uri = {},\n      i = 14;\n\n  while (i--) {\n    uri[parts[i]] = m[i] || '';\n  }\n\n  if (b != -1 && e != -1) {\n    uri.source = src;\n    uri.host = uri.host.substring(1, uri.host.length - 1).replace(/;/g, ':');\n    uri.authority = uri.authority.replace('[', '').replace(']', '').replace(/;/g, ':');\n    uri.ipv6uri = true;\n  }\n\n  return uri;\n};","var toString = {}.toString;\n\nmodule.exports = Array.isArray || function (arr) {\n  return toString.call(arr) == '[object Array]';\n};","module.exports = isBuf;\nvar withNativeBuffer = typeof Buffer === 'function' && typeof Buffer.isBuffer === 'function';\nvar withNativeArrayBuffer = typeof ArrayBuffer === 'function';\n\nvar isView = function isView(obj) {\n  return typeof ArrayBuffer.isView === 'function' ? ArrayBuffer.isView(obj) : obj.buffer instanceof ArrayBuffer;\n};\n/**\n * Returns true if obj is a buffer or an arraybuffer.\n *\n * @api private\n */\n\n\nfunction isBuf(obj) {\n  return withNativeBuffer && Buffer.isBuffer(obj) || withNativeArrayBuffer && (obj instanceof ArrayBuffer || isView(obj));\n}","/**\n * Module dependencies.\n */\nvar eio = require('engine.io-client');\n\nvar Socket = require('./socket');\n\nvar Emitter = require('component-emitter');\n\nvar parser = require('socket.io-parser');\n\nvar on = require('./on');\n\nvar bind = require('component-bind');\n\nvar debug = require('debug')('socket.io-client:manager');\n\nvar indexOf = require('indexof');\n\nvar Backoff = require('backo2');\n/**\n * IE6+ hasOwnProperty\n */\n\n\nvar has = Object.prototype.hasOwnProperty;\n/**\n * Module exports\n */\n\nmodule.exports = Manager;\n/**\n * `Manager` constructor.\n *\n * @param {String} engine instance or engine uri/opts\n * @param {Object} options\n * @api public\n */\n\nfunction Manager(uri, opts) {\n  if (!(this instanceof Manager)) return new Manager(uri, opts);\n\n  if (uri && 'object' === typeof uri) {\n    opts = uri;\n    uri = undefined;\n  }\n\n  opts = opts || {};\n  opts.path = opts.path || '/socket.io';\n  this.nsps = {};\n  this.subs = [];\n  this.opts = opts;\n  this.reconnection(opts.reconnection !== false);\n  this.reconnectionAttempts(opts.reconnectionAttempts || Infinity);\n  this.reconnectionDelay(opts.reconnectionDelay || 1000);\n  this.reconnectionDelayMax(opts.reconnectionDelayMax || 5000);\n  this.randomizationFactor(opts.randomizationFactor || 0.5);\n  this.backoff = new Backoff({\n    min: this.reconnectionDelay(),\n    max: this.reconnectionDelayMax(),\n    jitter: this.randomizationFactor()\n  });\n  this.timeout(null == opts.timeout ? 20000 : opts.timeout);\n  this.readyState = 'closed';\n  this.uri = uri;\n  this.connecting = [];\n  this.lastPing = null;\n  this.encoding = false;\n  this.packetBuffer = [];\n\n  var _parser = opts.parser || parser;\n\n  this.encoder = new _parser.Encoder();\n  this.decoder = new _parser.Decoder();\n  this.autoConnect = opts.autoConnect !== false;\n  if (this.autoConnect) this.open();\n}\n/**\n * Propagate given event to sockets and emit on `this`\n *\n * @api private\n */\n\n\nManager.prototype.emitAll = function () {\n  this.emit.apply(this, arguments);\n\n  for (var nsp in this.nsps) {\n    if (has.call(this.nsps, nsp)) {\n      this.nsps[nsp].emit.apply(this.nsps[nsp], arguments);\n    }\n  }\n};\n/**\n * Update `socket.id` of all sockets\n *\n * @api private\n */\n\n\nManager.prototype.updateSocketIds = function () {\n  for (var nsp in this.nsps) {\n    if (has.call(this.nsps, nsp)) {\n      this.nsps[nsp].id = this.generateId(nsp);\n    }\n  }\n};\n/**\n * generate `socket.id` for the given `nsp`\n *\n * @param {String} nsp\n * @return {String}\n * @api private\n */\n\n\nManager.prototype.generateId = function (nsp) {\n  return (nsp === '/' ? '' : nsp + '#') + this.engine.id;\n};\n/**\n * Mix in `Emitter`.\n */\n\n\nEmitter(Manager.prototype);\n/**\n * Sets the `reconnection` config.\n *\n * @param {Boolean} true/false if it should automatically reconnect\n * @return {Manager} self or value\n * @api public\n */\n\nManager.prototype.reconnection = function (v) {\n  if (!arguments.length) return this._reconnection;\n  this._reconnection = !!v;\n  return this;\n};\n/**\n * Sets the reconnection attempts config.\n *\n * @param {Number} max reconnection attempts before giving up\n * @return {Manager} self or value\n * @api public\n */\n\n\nManager.prototype.reconnectionAttempts = function (v) {\n  if (!arguments.length) return this._reconnectionAttempts;\n  this._reconnectionAttempts = v;\n  return this;\n};\n/**\n * Sets the delay between reconnections.\n *\n * @param {Number} delay\n * @return {Manager} self or value\n * @api public\n */\n\n\nManager.prototype.reconnectionDelay = function (v) {\n  if (!arguments.length) return this._reconnectionDelay;\n  this._reconnectionDelay = v;\n  this.backoff && this.backoff.setMin(v);\n  return this;\n};\n\nManager.prototype.randomizationFactor = function (v) {\n  if (!arguments.length) return this._randomizationFactor;\n  this._randomizationFactor = v;\n  this.backoff && this.backoff.setJitter(v);\n  return this;\n};\n/**\n * Sets the maximum delay between reconnections.\n *\n * @param {Number} delay\n * @return {Manager} self or value\n * @api public\n */\n\n\nManager.prototype.reconnectionDelayMax = function (v) {\n  if (!arguments.length) return this._reconnectionDelayMax;\n  this._reconnectionDelayMax = v;\n  this.backoff && this.backoff.setMax(v);\n  return this;\n};\n/**\n * Sets the connection timeout. `false` to disable\n *\n * @return {Manager} self or value\n * @api public\n */\n\n\nManager.prototype.timeout = function (v) {\n  if (!arguments.length) return this._timeout;\n  this._timeout = v;\n  return this;\n};\n/**\n * Starts trying to reconnect if reconnection is enabled and we have not\n * started reconnecting yet\n *\n * @api private\n */\n\n\nManager.prototype.maybeReconnectOnOpen = function () {\n  // Only try to reconnect if it's the first time we're connecting\n  if (!this.reconnecting && this._reconnection && this.backoff.attempts === 0) {\n    // keeps reconnection from firing twice for the same reconnection loop\n    this.reconnect();\n  }\n};\n/**\n * Sets the current transport `socket`.\n *\n * @param {Function} optional, callback\n * @return {Manager} self\n * @api public\n */\n\n\nManager.prototype.open = Manager.prototype.connect = function (fn, opts) {\n  debug('readyState %s', this.readyState);\n  if (~this.readyState.indexOf('open')) return this;\n  debug('opening %s', this.uri);\n  this.engine = eio(this.uri, this.opts);\n  var socket = this.engine;\n  var self = this;\n  this.readyState = 'opening';\n  this.skipReconnect = false; // emit `open`\n\n  var openSub = on(socket, 'open', function () {\n    self.onopen();\n    fn && fn();\n  }); // emit `connect_error`\n\n  var errorSub = on(socket, 'error', function (data) {\n    debug('connect_error');\n    self.cleanup();\n    self.readyState = 'closed';\n    self.emitAll('connect_error', data);\n\n    if (fn) {\n      var err = new Error('Connection error');\n      err.data = data;\n      fn(err);\n    } else {\n      // Only do this if there is no fn to handle the error\n      self.maybeReconnectOnOpen();\n    }\n  }); // emit `connect_timeout`\n\n  if (false !== this._timeout) {\n    var timeout = this._timeout;\n    debug('connect attempt will timeout after %d', timeout); // set timer\n\n    var timer = setTimeout(function () {\n      debug('connect attempt timed out after %d', timeout);\n      openSub.destroy();\n      socket.close();\n      socket.emit('error', 'timeout');\n      self.emitAll('connect_timeout', timeout);\n    }, timeout);\n    this.subs.push({\n      destroy: function destroy() {\n        clearTimeout(timer);\n      }\n    });\n  }\n\n  this.subs.push(openSub);\n  this.subs.push(errorSub);\n  return this;\n};\n/**\n * Called upon transport open.\n *\n * @api private\n */\n\n\nManager.prototype.onopen = function () {\n  debug('open'); // clear old subs\n\n  this.cleanup(); // mark as open\n\n  this.readyState = 'open';\n  this.emit('open'); // add new subs\n\n  var socket = this.engine;\n  this.subs.push(on(socket, 'data', bind(this, 'ondata')));\n  this.subs.push(on(socket, 'ping', bind(this, 'onping')));\n  this.subs.push(on(socket, 'pong', bind(this, 'onpong')));\n  this.subs.push(on(socket, 'error', bind(this, 'onerror')));\n  this.subs.push(on(socket, 'close', bind(this, 'onclose')));\n  this.subs.push(on(this.decoder, 'decoded', bind(this, 'ondecoded')));\n};\n/**\n * Called upon a ping.\n *\n * @api private\n */\n\n\nManager.prototype.onping = function () {\n  this.lastPing = new Date();\n  this.emitAll('ping');\n};\n/**\n * Called upon a packet.\n *\n * @api private\n */\n\n\nManager.prototype.onpong = function () {\n  this.emitAll('pong', new Date() - this.lastPing);\n};\n/**\n * Called with data.\n *\n * @api private\n */\n\n\nManager.prototype.ondata = function (data) {\n  this.decoder.add(data);\n};\n/**\n * Called when parser fully decodes a packet.\n *\n * @api private\n */\n\n\nManager.prototype.ondecoded = function (packet) {\n  this.emit('packet', packet);\n};\n/**\n * Called upon socket error.\n *\n * @api private\n */\n\n\nManager.prototype.onerror = function (err) {\n  debug('error', err);\n  this.emitAll('error', err);\n};\n/**\n * Creates a new socket for the given `nsp`.\n *\n * @return {Socket}\n * @api public\n */\n\n\nManager.prototype.socket = function (nsp, opts) {\n  var socket = this.nsps[nsp];\n\n  if (!socket) {\n    socket = new Socket(this, nsp, opts);\n    this.nsps[nsp] = socket;\n    var self = this;\n    socket.on('connecting', onConnecting);\n    socket.on('connect', function () {\n      socket.id = self.generateId(nsp);\n    });\n\n    if (this.autoConnect) {\n      // manually call here since connecting event is fired before listening\n      onConnecting();\n    }\n  }\n\n  function onConnecting() {\n    if (!~indexOf(self.connecting, socket)) {\n      self.connecting.push(socket);\n    }\n  }\n\n  return socket;\n};\n/**\n * Called upon a socket close.\n *\n * @param {Socket} socket\n */\n\n\nManager.prototype.destroy = function (socket) {\n  var index = indexOf(this.connecting, socket);\n  if (~index) this.connecting.splice(index, 1);\n  if (this.connecting.length) return;\n  this.close();\n};\n/**\n * Writes a packet.\n *\n * @param {Object} packet\n * @api private\n */\n\n\nManager.prototype.packet = function (packet) {\n  debug('writing packet %j', packet);\n  var self = this;\n  if (packet.query && packet.type === 0) packet.nsp += '?' + packet.query;\n\n  if (!self.encoding) {\n    // encode, then write to engine with result\n    self.encoding = true;\n    this.encoder.encode(packet, function (encodedPackets) {\n      for (var i = 0; i < encodedPackets.length; i++) {\n        self.engine.write(encodedPackets[i], packet.options);\n      }\n\n      self.encoding = false;\n      self.processPacketQueue();\n    });\n  } else {\n    // add packet to the queue\n    self.packetBuffer.push(packet);\n  }\n};\n/**\n * If packet buffer is non-empty, begins encoding the\n * next packet in line.\n *\n * @api private\n */\n\n\nManager.prototype.processPacketQueue = function () {\n  if (this.packetBuffer.length > 0 && !this.encoding) {\n    var pack = this.packetBuffer.shift();\n    this.packet(pack);\n  }\n};\n/**\n * Clean up transport subscriptions and packet buffer.\n *\n * @api private\n */\n\n\nManager.prototype.cleanup = function () {\n  debug('cleanup');\n  var subsLength = this.subs.length;\n\n  for (var i = 0; i < subsLength; i++) {\n    var sub = this.subs.shift();\n    sub.destroy();\n  }\n\n  this.packetBuffer = [];\n  this.encoding = false;\n  this.lastPing = null;\n  this.decoder.destroy();\n};\n/**\n * Close the current socket.\n *\n * @api private\n */\n\n\nManager.prototype.close = Manager.prototype.disconnect = function () {\n  debug('disconnect');\n  this.skipReconnect = true;\n  this.reconnecting = false;\n\n  if ('opening' === this.readyState) {\n    // `onclose` will not fire because\n    // an open event never happened\n    this.cleanup();\n  }\n\n  this.backoff.reset();\n  this.readyState = 'closed';\n  if (this.engine) this.engine.close();\n};\n/**\n * Called upon engine close.\n *\n * @api private\n */\n\n\nManager.prototype.onclose = function (reason) {\n  debug('onclose');\n  this.cleanup();\n  this.backoff.reset();\n  this.readyState = 'closed';\n  this.emit('close', reason);\n\n  if (this._reconnection && !this.skipReconnect) {\n    this.reconnect();\n  }\n};\n/**\n * Attempt a reconnection.\n *\n * @api private\n */\n\n\nManager.prototype.reconnect = function () {\n  if (this.reconnecting || this.skipReconnect) return this;\n  var self = this;\n\n  if (this.backoff.attempts >= this._reconnectionAttempts) {\n    debug('reconnect failed');\n    this.backoff.reset();\n    this.emitAll('reconnect_failed');\n    this.reconnecting = false;\n  } else {\n    var delay = this.backoff.duration();\n    debug('will wait %dms before reconnect attempt', delay);\n    this.reconnecting = true;\n    var timer = setTimeout(function () {\n      if (self.skipReconnect) return;\n      debug('attempting reconnect');\n      self.emitAll('reconnect_attempt', self.backoff.attempts);\n      self.emitAll('reconnecting', self.backoff.attempts); // check again for the case socket closed in above events\n\n      if (self.skipReconnect) return;\n      self.open(function (err) {\n        if (err) {\n          debug('reconnect attempt error');\n          self.reconnecting = false;\n          self.reconnect();\n          self.emitAll('reconnect_error', err.data);\n        } else {\n          debug('reconnect success');\n          self.onreconnect();\n        }\n      });\n    }, delay);\n    this.subs.push({\n      destroy: function destroy() {\n        clearTimeout(timer);\n      }\n    });\n  }\n};\n/**\n * Called upon successful reconnect.\n *\n * @api private\n */\n\n\nManager.prototype.onreconnect = function () {\n  var attempt = this.backoff.attempts;\n  this.reconnecting = false;\n  this.backoff.reset();\n  this.updateSocketIds();\n  this.emitAll('reconnect', attempt);\n};","/**\n * Module dependencies\n */\nvar XMLHttpRequest = require('xmlhttprequest-ssl');\n\nvar XHR = require('./polling-xhr');\n\nvar JSONP = require('./polling-jsonp');\n\nvar websocket = require('./websocket');\n/**\n * Export transports.\n */\n\n\nexports.polling = polling;\nexports.websocket = websocket;\n/**\n * Polling transport polymorphic constructor.\n * Decides on xhr vs jsonp based on feature detection.\n *\n * @api private\n */\n\nfunction polling(opts) {\n  var xhr;\n  var xd = false;\n  var xs = false;\n  var jsonp = false !== opts.jsonp;\n\n  if (typeof location !== 'undefined') {\n    var isSSL = 'https:' === location.protocol;\n    var port = location.port; // some user agents have empty `location.port`\n\n    if (!port) {\n      port = isSSL ? 443 : 80;\n    }\n\n    xd = opts.hostname !== location.hostname || port !== opts.port;\n    xs = opts.secure !== isSSL;\n  }\n\n  opts.xdomain = xd;\n  opts.xscheme = xs;\n  xhr = new XMLHttpRequest(opts);\n\n  if ('open' in xhr && !opts.forceJSONP) {\n    return new XHR(opts);\n  } else {\n    if (!jsonp) throw new Error('JSONP disabled');\n    return new JSONP(opts);\n  }\n}","/**\n * Module dependencies.\n */\nvar Transport = require('../transport');\n\nvar parseqs = require('parseqs');\n\nvar parser = require('engine.io-parser');\n\nvar inherit = require('component-inherit');\n\nvar yeast = require('yeast');\n\nvar debug = require('debug')('engine.io-client:polling');\n/**\n * Module exports.\n */\n\n\nmodule.exports = Polling;\n/**\n * Is XHR2 supported?\n */\n\nvar hasXHR2 = function () {\n  var XMLHttpRequest = require('xmlhttprequest-ssl');\n\n  var xhr = new XMLHttpRequest({\n    xdomain: false\n  });\n  return null != xhr.responseType;\n}();\n/**\n * Polling interface.\n *\n * @param {Object} opts\n * @api private\n */\n\n\nfunction Polling(opts) {\n  var forceBase64 = opts && opts.forceBase64;\n\n  if (!hasXHR2 || forceBase64) {\n    this.supportsBinary = false;\n  }\n\n  Transport.call(this, opts);\n}\n/**\n * Inherits from Transport.\n */\n\n\ninherit(Polling, Transport);\n/**\n * Transport name.\n */\n\nPolling.prototype.name = 'polling';\n/**\n * Opens the socket (triggers polling). We write a PING message to determine\n * when the transport is open.\n *\n * @api private\n */\n\nPolling.prototype.doOpen = function () {\n  this.poll();\n};\n/**\n * Pauses polling.\n *\n * @param {Function} callback upon buffers are flushed and transport is paused\n * @api private\n */\n\n\nPolling.prototype.pause = function (onPause) {\n  var self = this;\n  this.readyState = 'pausing';\n\n  function pause() {\n    debug('paused');\n    self.readyState = 'paused';\n    onPause();\n  }\n\n  if (this.polling || !this.writable) {\n    var total = 0;\n\n    if (this.polling) {\n      debug('we are currently polling - waiting to pause');\n      total++;\n      this.once('pollComplete', function () {\n        debug('pre-pause polling complete');\n        --total || pause();\n      });\n    }\n\n    if (!this.writable) {\n      debug('we are currently writing - waiting to pause');\n      total++;\n      this.once('drain', function () {\n        debug('pre-pause writing complete');\n        --total || pause();\n      });\n    }\n  } else {\n    pause();\n  }\n};\n/**\n * Starts polling cycle.\n *\n * @api public\n */\n\n\nPolling.prototype.poll = function () {\n  debug('polling');\n  this.polling = true;\n  this.doPoll();\n  this.emit('poll');\n};\n/**\n * Overloads onData to detect payloads.\n *\n * @api private\n */\n\n\nPolling.prototype.onData = function (data) {\n  var self = this;\n  debug('polling got data %s', data);\n\n  var callback = function callback(packet, index, total) {\n    // if its the first message we consider the transport open\n    if ('opening' === self.readyState) {\n      self.onOpen();\n    } // if its a close packet, we close the ongoing requests\n\n\n    if ('close' === packet.type) {\n      self.onClose();\n      return false;\n    } // otherwise bypass onData and handle the message\n\n\n    self.onPacket(packet);\n  }; // decode payload\n\n\n  parser.decodePayload(data, this.socket.binaryType, callback); // if an event did not trigger closing\n\n  if ('closed' !== this.readyState) {\n    // if we got data we're not polling\n    this.polling = false;\n    this.emit('pollComplete');\n\n    if ('open' === this.readyState) {\n      this.poll();\n    } else {\n      debug('ignoring poll - transport state \"%s\"', this.readyState);\n    }\n  }\n};\n/**\n * For polling, send a close packet.\n *\n * @api private\n */\n\n\nPolling.prototype.doClose = function () {\n  var self = this;\n\n  function close() {\n    debug('writing close packet');\n    self.write([{\n      type: 'close'\n    }]);\n  }\n\n  if ('open' === this.readyState) {\n    debug('transport open - closing');\n    close();\n  } else {\n    // in case we're trying to close while\n    // handshaking is in progress (GH-164)\n    debug('transport not open - deferring close');\n    this.once('open', close);\n  }\n};\n/**\n * Writes a packets payload.\n *\n * @param {Array} data packets\n * @param {Function} drain callback\n * @api private\n */\n\n\nPolling.prototype.write = function (packets) {\n  var self = this;\n  this.writable = false;\n\n  var callbackfn = function callbackfn() {\n    self.writable = true;\n    self.emit('drain');\n  };\n\n  parser.encodePayload(packets, this.supportsBinary, function (data) {\n    self.doWrite(data, callbackfn);\n  });\n};\n/**\n * Generates uri for connection.\n *\n * @api private\n */\n\n\nPolling.prototype.uri = function () {\n  var query = this.query || {};\n  var schema = this.secure ? 'https' : 'http';\n  var port = ''; // cache busting is forced\n\n  if (false !== this.timestampRequests) {\n    query[this.timestampParam] = yeast();\n  }\n\n  if (!this.supportsBinary && !query.sid) {\n    query.b64 = 1;\n  }\n\n  query = parseqs.encode(query); // avoid port if default for schema\n\n  if (this.port && ('https' === schema && Number(this.port) !== 443 || 'http' === schema && Number(this.port) !== 80)) {\n    port = ':' + this.port;\n  } // prepend ? to query\n\n\n  if (query.length) {\n    query = '?' + query;\n  }\n\n  var ipv6 = this.hostname.indexOf(':') !== -1;\n  return schema + '://' + (ipv6 ? '[' + this.hostname + ']' : this.hostname) + port + this.path + query;\n};","/* global Blob File */\n\n/*\n * Module requirements.\n */\nvar isArray = require('isarray');\n\nvar toString = Object.prototype.toString;\nvar withNativeBlob = typeof Blob === 'function' || typeof Blob !== 'undefined' && toString.call(Blob) === '[object BlobConstructor]';\nvar withNativeFile = typeof File === 'function' || typeof File !== 'undefined' && toString.call(File) === '[object FileConstructor]';\n/**\n * Module exports.\n */\n\nmodule.exports = hasBinary;\n/**\n * Checks for binary data.\n *\n * Supports Buffer, ArrayBuffer, Blob and File.\n *\n * @param {Object} anything\n * @api public\n */\n\nfunction hasBinary(obj) {\n  if (!obj || typeof obj !== 'object') {\n    return false;\n  }\n\n  if (isArray(obj)) {\n    for (var i = 0, l = obj.length; i < l; i++) {\n      if (hasBinary(obj[i])) {\n        return true;\n      }\n    }\n\n    return false;\n  }\n\n  if (typeof Buffer === 'function' && Buffer.isBuffer && Buffer.isBuffer(obj) || typeof ArrayBuffer === 'function' && obj instanceof ArrayBuffer || withNativeBlob && obj instanceof Blob || withNativeFile && obj instanceof File) {\n    return true;\n  } // see: https://github.com/Automattic/has-binary/pull/4\n\n\n  if (obj.toJSON && typeof obj.toJSON === 'function' && arguments.length === 1) {\n    return hasBinary(obj.toJSON(), true);\n  }\n\n  for (var key in obj) {\n    if (Object.prototype.hasOwnProperty.call(obj, key) && hasBinary(obj[key])) {\n      return true;\n    }\n  }\n\n  return false;\n}","'use strict';\n\nvar alphabet = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_'.split(''),\n    length = 64,\n    map = {},\n    seed = 0,\n    i = 0,\n    prev;\n/**\n * Return a string representing the specified number.\n *\n * @param {Number} num The number to convert.\n * @returns {String} The string representation of the number.\n * @api public\n */\n\nfunction encode(num) {\n  var encoded = '';\n\n  do {\n    encoded = alphabet[num % length] + encoded;\n    num = Math.floor(num / length);\n  } while (num > 0);\n\n  return encoded;\n}\n/**\n * Return the integer value specified by the given string.\n *\n * @param {String} str The string to convert.\n * @returns {Number} The integer value represented by the string.\n * @api public\n */\n\n\nfunction decode(str) {\n  var decoded = 0;\n\n  for (i = 0; i < str.length; i++) {\n    decoded = decoded * length + map[str.charAt(i)];\n  }\n\n  return decoded;\n}\n/**\n * Yeast: A tiny growing id generator.\n *\n * @returns {String} A unique id.\n * @api public\n */\n\n\nfunction yeast() {\n  var now = encode(+new Date());\n  if (now !== prev) return seed = 0, prev = now;\n  return now + '.' + encode(seed++);\n} //\n// Map each character to its index.\n//\n\n\nfor (; i < length; i++) {\n  map[alphabet[i]] = i;\n} //\n// Expose the `yeast`, `encode` and `decode` functions.\n//\n\n\nyeast.encode = encode;\nyeast.decode = decode;\nmodule.exports = yeast;","var indexOf = [].indexOf;\n\nmodule.exports = function (arr, obj) {\n  if (indexOf) return arr.indexOf(obj);\n\n  for (var i = 0; i < arr.length; ++i) {\n    if (arr[i] === obj) return i;\n  }\n\n  return -1;\n};","/**\n * Module dependencies.\n */\nvar parser = require('socket.io-parser');\n\nvar Emitter = require('component-emitter');\n\nvar toArray = require('to-array');\n\nvar on = require('./on');\n\nvar bind = require('component-bind');\n\nvar debug = require('debug')('socket.io-client:socket');\n\nvar parseqs = require('parseqs');\n\nvar hasBin = require('has-binary2');\n/**\n * Module exports.\n */\n\n\nmodule.exports = exports = Socket;\n/**\n * Internal events (blacklisted).\n * These events can't be emitted by the user.\n *\n * @api private\n */\n\nvar events = {\n  connect: 1,\n  connect_error: 1,\n  connect_timeout: 1,\n  connecting: 1,\n  disconnect: 1,\n  error: 1,\n  reconnect: 1,\n  reconnect_attempt: 1,\n  reconnect_failed: 1,\n  reconnect_error: 1,\n  reconnecting: 1,\n  ping: 1,\n  pong: 1\n};\n/**\n * Shortcut to `Emitter#emit`.\n */\n\nvar emit = Emitter.prototype.emit;\n/**\n * `Socket` constructor.\n *\n * @api public\n */\n\nfunction Socket(io, nsp, opts) {\n  this.io = io;\n  this.nsp = nsp;\n  this.json = this; // compat\n\n  this.ids = 0;\n  this.acks = {};\n  this.receiveBuffer = [];\n  this.sendBuffer = [];\n  this.connected = false;\n  this.disconnected = true;\n  this.flags = {};\n\n  if (opts && opts.query) {\n    this.query = opts.query;\n  }\n\n  if (this.io.autoConnect) this.open();\n}\n/**\n * Mix in `Emitter`.\n */\n\n\nEmitter(Socket.prototype);\n/**\n * Subscribe to open, close and packet events\n *\n * @api private\n */\n\nSocket.prototype.subEvents = function () {\n  if (this.subs) return;\n  var io = this.io;\n  this.subs = [on(io, 'open', bind(this, 'onopen')), on(io, 'packet', bind(this, 'onpacket')), on(io, 'close', bind(this, 'onclose'))];\n};\n/**\n * \"Opens\" the socket.\n *\n * @api public\n */\n\n\nSocket.prototype.open = Socket.prototype.connect = function () {\n  if (this.connected) return this;\n  this.subEvents();\n  this.io.open(); // ensure open\n\n  if ('open' === this.io.readyState) this.onopen();\n  this.emit('connecting');\n  return this;\n};\n/**\n * Sends a `message` event.\n *\n * @return {Socket} self\n * @api public\n */\n\n\nSocket.prototype.send = function () {\n  var args = toArray(arguments);\n  args.unshift('message');\n  this.emit.apply(this, args);\n  return this;\n};\n/**\n * Override `emit`.\n * If the event is in `events`, it's emitted normally.\n *\n * @param {String} event name\n * @return {Socket} self\n * @api public\n */\n\n\nSocket.prototype.emit = function (ev) {\n  if (events.hasOwnProperty(ev)) {\n    emit.apply(this, arguments);\n    return this;\n  }\n\n  var args = toArray(arguments);\n  var packet = {\n    type: (this.flags.binary !== undefined ? this.flags.binary : hasBin(args)) ? parser.BINARY_EVENT : parser.EVENT,\n    data: args\n  };\n  packet.options = {};\n  packet.options.compress = !this.flags || false !== this.flags.compress; // event ack callback\n\n  if ('function' === typeof args[args.length - 1]) {\n    debug('emitting packet with ack id %d', this.ids);\n    this.acks[this.ids] = args.pop();\n    packet.id = this.ids++;\n  }\n\n  if (this.connected) {\n    this.packet(packet);\n  } else {\n    this.sendBuffer.push(packet);\n  }\n\n  this.flags = {};\n  return this;\n};\n/**\n * Sends a packet.\n *\n * @param {Object} packet\n * @api private\n */\n\n\nSocket.prototype.packet = function (packet) {\n  packet.nsp = this.nsp;\n  this.io.packet(packet);\n};\n/**\n * Called upon engine `open`.\n *\n * @api private\n */\n\n\nSocket.prototype.onopen = function () {\n  debug('transport is open - connecting'); // write connect packet if necessary\n\n  if ('/' !== this.nsp) {\n    if (this.query) {\n      var query = typeof this.query === 'object' ? parseqs.encode(this.query) : this.query;\n      debug('sending connect packet with query %s', query);\n      this.packet({\n        type: parser.CONNECT,\n        query: query\n      });\n    } else {\n      this.packet({\n        type: parser.CONNECT\n      });\n    }\n  }\n};\n/**\n * Called upon engine `close`.\n *\n * @param {String} reason\n * @api private\n */\n\n\nSocket.prototype.onclose = function (reason) {\n  debug('close (%s)', reason);\n  this.connected = false;\n  this.disconnected = true;\n  delete this.id;\n  this.emit('disconnect', reason);\n};\n/**\n * Called with socket packet.\n *\n * @param {Object} packet\n * @api private\n */\n\n\nSocket.prototype.onpacket = function (packet) {\n  var sameNamespace = packet.nsp === this.nsp;\n  var rootNamespaceError = packet.type === parser.ERROR && packet.nsp === '/';\n  if (!sameNamespace && !rootNamespaceError) return;\n\n  switch (packet.type) {\n    case parser.CONNECT:\n      this.onconnect();\n      break;\n\n    case parser.EVENT:\n      this.onevent(packet);\n      break;\n\n    case parser.BINARY_EVENT:\n      this.onevent(packet);\n      break;\n\n    case parser.ACK:\n      this.onack(packet);\n      break;\n\n    case parser.BINARY_ACK:\n      this.onack(packet);\n      break;\n\n    case parser.DISCONNECT:\n      this.ondisconnect();\n      break;\n\n    case parser.ERROR:\n      this.emit('error', packet.data);\n      break;\n  }\n};\n/**\n * Called upon a server event.\n *\n * @param {Object} packet\n * @api private\n */\n\n\nSocket.prototype.onevent = function (packet) {\n  var args = packet.data || [];\n  debug('emitting event %j', args);\n\n  if (null != packet.id) {\n    debug('attaching ack callback to event');\n    args.push(this.ack(packet.id));\n  }\n\n  if (this.connected) {\n    emit.apply(this, args);\n  } else {\n    this.receiveBuffer.push(args);\n  }\n};\n/**\n * Produces an ack callback to emit with an event.\n *\n * @api private\n */\n\n\nSocket.prototype.ack = function (id) {\n  var self = this;\n  var sent = false;\n  return function () {\n    // prevent double callbacks\n    if (sent) return;\n    sent = true;\n    var args = toArray(arguments);\n    debug('sending ack %j', args);\n    self.packet({\n      type: hasBin(args) ? parser.BINARY_ACK : parser.ACK,\n      id: id,\n      data: args\n    });\n  };\n};\n/**\n * Called upon a server acknowlegement.\n *\n * @param {Object} packet\n * @api private\n */\n\n\nSocket.prototype.onack = function (packet) {\n  var ack = this.acks[packet.id];\n\n  if ('function' === typeof ack) {\n    debug('calling ack %s with %j', packet.id, packet.data);\n    ack.apply(this, packet.data);\n    delete this.acks[packet.id];\n  } else {\n    debug('bad ack %s', packet.id);\n  }\n};\n/**\n * Called upon server connect.\n *\n * @api private\n */\n\n\nSocket.prototype.onconnect = function () {\n  this.connected = true;\n  this.disconnected = false;\n  this.emit('connect');\n  this.emitBuffered();\n};\n/**\n * Emit buffered events (received and emitted).\n *\n * @api private\n */\n\n\nSocket.prototype.emitBuffered = function () {\n  var i;\n\n  for (i = 0; i < this.receiveBuffer.length; i++) {\n    emit.apply(this, this.receiveBuffer[i]);\n  }\n\n  this.receiveBuffer = [];\n\n  for (i = 0; i < this.sendBuffer.length; i++) {\n    this.packet(this.sendBuffer[i]);\n  }\n\n  this.sendBuffer = [];\n};\n/**\n * Called upon server disconnect.\n *\n * @api private\n */\n\n\nSocket.prototype.ondisconnect = function () {\n  debug('server disconnect (%s)', this.nsp);\n  this.destroy();\n  this.onclose('io server disconnect');\n};\n/**\n * Called upon forced client/server side disconnections,\n * this method ensures the manager stops tracking us and\n * that reconnections don't get triggered for this.\n *\n * @api private.\n */\n\n\nSocket.prototype.destroy = function () {\n  if (this.subs) {\n    // clean subscriptions to avoid reconnections\n    for (var i = 0; i < this.subs.length; i++) {\n      this.subs[i].destroy();\n    }\n\n    this.subs = null;\n  }\n\n  this.io.destroy(this);\n};\n/**\n * Disconnects the socket manually.\n *\n * @return {Socket} self\n * @api public\n */\n\n\nSocket.prototype.close = Socket.prototype.disconnect = function () {\n  if (this.connected) {\n    debug('performing disconnect (%s)', this.nsp);\n    this.packet({\n      type: parser.DISCONNECT\n    });\n  } // remove socket from pool\n\n\n  this.destroy();\n\n  if (this.connected) {\n    // fire events\n    this.onclose('io client disconnect');\n  }\n\n  return this;\n};\n/**\n * Sets the compress flag.\n *\n * @param {Boolean} if `true`, compresses the sending data\n * @return {Socket} self\n * @api public\n */\n\n\nSocket.prototype.compress = function (compress) {\n  this.flags.compress = compress;\n  return this;\n};\n/**\n * Sets the binary flag\n *\n * @param {Boolean} whether the emitted data contains binary\n * @return {Socket} self\n * @api public\n */\n\n\nSocket.prototype.binary = function (binary) {\n  this.flags.binary = binary;\n  return this;\n};","/**\n * Module exports.\n */\nmodule.exports = on;\n/**\n * Helper for subscriptions.\n *\n * @param {Object|EventEmitter} obj with `Emitter` mixin or `EventEmitter`\n * @param {String} event name\n * @param {Function} callback\n * @api public\n */\n\nfunction on(obj, ev, fn) {\n  obj.on(ev, fn);\n  return {\n    destroy: function destroy() {\n      obj.removeListener(ev, fn);\n    }\n  };\n}","/**\n * Slice reference.\n */\nvar slice = [].slice;\n/**\n * Bind `obj` to `fn`.\n *\n * @param {Object} obj\n * @param {Function|String} fn or string\n * @return {Function}\n * @api public\n */\n\nmodule.exports = function (obj, fn) {\n  if ('string' == typeof fn) fn = obj[fn];\n  if ('function' != typeof fn) throw new Error('bind() requires a function');\n  var args = slice.call(arguments, 2);\n  return function () {\n    return fn.apply(obj, args.concat(slice.call(arguments)));\n  };\n};","/*! @name m3u8-parser @version 4.4.0 @license Apache-2.0 */\nimport window from 'global/window';\n\nfunction _extends() {\n  _extends = Object.assign || function (target) {\n    for (var i = 1; i < arguments.length; i++) {\n      var source = arguments[i];\n\n      for (var key in source) {\n        if (Object.prototype.hasOwnProperty.call(source, key)) {\n          target[key] = source[key];\n        }\n      }\n    }\n\n    return target;\n  };\n\n  return _extends.apply(this, arguments);\n}\n\nfunction _inheritsLoose(subClass, superClass) {\n  subClass.prototype = Object.create(superClass.prototype);\n  subClass.prototype.constructor = subClass;\n  subClass.__proto__ = superClass;\n}\n\nfunction _assertThisInitialized(self) {\n  if (self === void 0) {\n    throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n  }\n\n  return self;\n}\n/**\n * @file stream.js\n */\n\n/**\n * A lightweight readable stream implementation that handles event dispatching.\n *\n * @class Stream\n */\n\n\nvar Stream =\n/*#__PURE__*/\nfunction () {\n  function Stream() {\n    this.listeners = {};\n  }\n  /**\n   * Add a listener for a specified event type.\n   *\n   * @param {string} type the event name\n   * @param {Function} listener the callback to be invoked when an event of\n   * the specified type occurs\n   */\n\n\n  var _proto = Stream.prototype;\n\n  _proto.on = function on(type, listener) {\n    if (!this.listeners[type]) {\n      this.listeners[type] = [];\n    }\n\n    this.listeners[type].push(listener);\n  }\n  /**\n   * Remove a listener for a specified event type.\n   *\n   * @param {string} type the event name\n   * @param {Function} listener  a function previously registered for this\n   * type of event through `on`\n   * @return {boolean} if we could turn it off or not\n   */\n  ;\n\n  _proto.off = function off(type, listener) {\n    if (!this.listeners[type]) {\n      return false;\n    }\n\n    var index = this.listeners[type].indexOf(listener);\n    this.listeners[type].splice(index, 1);\n    return index > -1;\n  }\n  /**\n   * Trigger an event of the specified type on this stream. Any additional\n   * arguments to this function are passed as parameters to event listeners.\n   *\n   * @param {string} type the event name\n   */\n  ;\n\n  _proto.trigger = function trigger(type) {\n    var callbacks = this.listeners[type];\n    var i;\n    var length;\n    var args;\n\n    if (!callbacks) {\n      return;\n    } // Slicing the arguments on every invocation of this method\n    // can add a significant amount of overhead. Avoid the\n    // intermediate object creation for the common case of a\n    // single callback argument\n\n\n    if (arguments.length === 2) {\n      length = callbacks.length;\n\n      for (i = 0; i < length; ++i) {\n        callbacks[i].call(this, arguments[1]);\n      }\n    } else {\n      args = Array.prototype.slice.call(arguments, 1);\n      length = callbacks.length;\n\n      for (i = 0; i < length; ++i) {\n        callbacks[i].apply(this, args);\n      }\n    }\n  }\n  /**\n   * Destroys the stream and cleans up.\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.listeners = {};\n  }\n  /**\n   * Forwards all `data` events on this stream to the destination stream. The\n   * destination stream should provide a method `push` to receive the data\n   * events as they arrive.\n   *\n   * @param {Stream} destination the stream that will receive all `data` events\n   * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n   */\n  ;\n\n  _proto.pipe = function pipe(destination) {\n    this.on('data', function (data) {\n      destination.push(data);\n    });\n  };\n\n  return Stream;\n}();\n/**\n * A stream that buffers string input and generates a `data` event for each\n * line.\n *\n * @class LineStream\n * @extends Stream\n */\n\n\nvar LineStream =\n/*#__PURE__*/\nfunction (_Stream) {\n  _inheritsLoose(LineStream, _Stream);\n\n  function LineStream() {\n    var _this;\n\n    _this = _Stream.call(this) || this;\n    _this.buffer = '';\n    return _this;\n  }\n  /**\n   * Add new data to be parsed.\n   *\n   * @param {string} data the text to process\n   */\n\n\n  var _proto = LineStream.prototype;\n\n  _proto.push = function push(data) {\n    var nextNewline;\n    this.buffer += data;\n    nextNewline = this.buffer.indexOf('\\n');\n\n    for (; nextNewline > -1; nextNewline = this.buffer.indexOf('\\n')) {\n      this.trigger('data', this.buffer.substring(0, nextNewline));\n      this.buffer = this.buffer.substring(nextNewline + 1);\n    }\n  };\n\n  return LineStream;\n}(Stream);\n/**\n * \"forgiving\" attribute list psuedo-grammar:\n * attributes -> keyvalue (',' keyvalue)*\n * keyvalue   -> key '=' value\n * key        -> [^=]*\n * value      -> '\"' [^\"]* '\"' | [^,]*\n */\n\n\nvar attributeSeparator = function attributeSeparator() {\n  var key = '[^=]*';\n  var value = '\"[^\"]*\"|[^,]*';\n  var keyvalue = '(?:' + key + ')=(?:' + value + ')';\n  return new RegExp('(?:^|,)(' + keyvalue + ')');\n};\n/**\n * Parse attributes from a line given the separator\n *\n * @param {string} attributes the attribute line to parse\n */\n\n\nvar parseAttributes = function parseAttributes(attributes) {\n  // split the string using attributes as the separator\n  var attrs = attributes.split(attributeSeparator());\n  var result = {};\n  var i = attrs.length;\n  var attr;\n\n  while (i--) {\n    // filter out unmatched portions of the string\n    if (attrs[i] === '') {\n      continue;\n    } // split the key and value\n\n\n    attr = /([^=]*)=(.*)/.exec(attrs[i]).slice(1); // trim whitespace and remove optional quotes around the value\n\n    attr[0] = attr[0].replace(/^\\s+|\\s+$/g, '');\n    attr[1] = attr[1].replace(/^\\s+|\\s+$/g, '');\n    attr[1] = attr[1].replace(/^['\"](.*)['\"]$/g, '$1');\n    result[attr[0]] = attr[1];\n  }\n\n  return result;\n};\n/**\n * A line-level M3U8 parser event stream. It expects to receive input one\n * line at a time and performs a context-free parse of its contents. A stream\n * interpretation of a manifest can be useful if the manifest is expected to\n * be too large to fit comfortably into memory or the entirety of the input\n * is not immediately available. Otherwise, it's probably much easier to work\n * with a regular `Parser` object.\n *\n * Produces `data` events with an object that captures the parser's\n * interpretation of the input. That object has a property `tag` that is one\n * of `uri`, `comment`, or `tag`. URIs only have a single additional\n * property, `line`, which captures the entirety of the input without\n * interpretation. Comments similarly have a single additional property\n * `text` which is the input without the leading `#`.\n *\n * Tags always have a property `tagType` which is the lower-cased version of\n * the M3U8 directive without the `#EXT` or `#EXT-X-` prefix. For instance,\n * `#EXT-X-MEDIA-SEQUENCE` becomes `media-sequence` when parsed. Unrecognized\n * tags are given the tag type `unknown` and a single additional property\n * `data` with the remainder of the input.\n *\n * @class ParseStream\n * @extends Stream\n */\n\n\nvar ParseStream =\n/*#__PURE__*/\nfunction (_Stream) {\n  _inheritsLoose(ParseStream, _Stream);\n\n  function ParseStream() {\n    var _this;\n\n    _this = _Stream.call(this) || this;\n    _this.customParsers = [];\n    _this.tagMappers = [];\n    return _this;\n  }\n  /**\n   * Parses an additional line of input.\n   *\n   * @param {string} line a single line of an M3U8 file to parse\n   */\n\n\n  var _proto = ParseStream.prototype;\n\n  _proto.push = function push(line) {\n    var _this2 = this;\n\n    var match;\n    var event; // strip whitespace\n\n    line = line.trim();\n\n    if (line.length === 0) {\n      // ignore empty lines\n      return;\n    } // URIs\n\n\n    if (line[0] !== '#') {\n      this.trigger('data', {\n        type: 'uri',\n        uri: line\n      });\n      return;\n    } // map tags\n\n\n    var newLines = this.tagMappers.reduce(function (acc, mapper) {\n      var mappedLine = mapper(line); // skip if unchanged\n\n      if (mappedLine === line) {\n        return acc;\n      }\n\n      return acc.concat([mappedLine]);\n    }, [line]);\n    newLines.forEach(function (newLine) {\n      for (var i = 0; i < _this2.customParsers.length; i++) {\n        if (_this2.customParsers[i].call(_this2, newLine)) {\n          return;\n        }\n      } // Comments\n\n\n      if (newLine.indexOf('#EXT') !== 0) {\n        _this2.trigger('data', {\n          type: 'comment',\n          text: newLine.slice(1)\n        });\n\n        return;\n      } // strip off any carriage returns here so the regex matching\n      // doesn't have to account for them.\n\n\n      newLine = newLine.replace('\\r', ''); // Tags\n\n      match = /^#EXTM3U/.exec(newLine);\n\n      if (match) {\n        _this2.trigger('data', {\n          type: 'tag',\n          tagType: 'm3u'\n        });\n\n        return;\n      }\n\n      match = /^#EXTINF:?([0-9\\.]*)?,?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'inf'\n        };\n\n        if (match[1]) {\n          event.duration = parseFloat(match[1]);\n        }\n\n        if (match[2]) {\n          event.title = match[2];\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-TARGETDURATION:?([0-9.]*)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'targetduration'\n        };\n\n        if (match[1]) {\n          event.duration = parseInt(match[1], 10);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#ZEN-TOTAL-DURATION:?([0-9.]*)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'totalduration'\n        };\n\n        if (match[1]) {\n          event.duration = parseInt(match[1], 10);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-VERSION:?([0-9.]*)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'version'\n        };\n\n        if (match[1]) {\n          event.version = parseInt(match[1], 10);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-MEDIA-SEQUENCE:?(\\-?[0-9.]*)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'media-sequence'\n        };\n\n        if (match[1]) {\n          event.number = parseInt(match[1], 10);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-DISCONTINUITY-SEQUENCE:?(\\-?[0-9.]*)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'discontinuity-sequence'\n        };\n\n        if (match[1]) {\n          event.number = parseInt(match[1], 10);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-PLAYLIST-TYPE:?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'playlist-type'\n        };\n\n        if (match[1]) {\n          event.playlistType = match[1];\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-BYTERANGE:?([0-9.]*)?@?([0-9.]*)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'byterange'\n        };\n\n        if (match[1]) {\n          event.length = parseInt(match[1], 10);\n        }\n\n        if (match[2]) {\n          event.offset = parseInt(match[2], 10);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-ALLOW-CACHE:?(YES|NO)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'allow-cache'\n        };\n\n        if (match[1]) {\n          event.allowed = !/NO/.test(match[1]);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-MAP:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'map'\n        };\n\n        if (match[1]) {\n          var attributes = parseAttributes(match[1]);\n\n          if (attributes.URI) {\n            event.uri = attributes.URI;\n          }\n\n          if (attributes.BYTERANGE) {\n            var _attributes$BYTERANGE = attributes.BYTERANGE.split('@'),\n                length = _attributes$BYTERANGE[0],\n                offset = _attributes$BYTERANGE[1];\n\n            event.byterange = {};\n\n            if (length) {\n              event.byterange.length = parseInt(length, 10);\n            }\n\n            if (offset) {\n              event.byterange.offset = parseInt(offset, 10);\n            }\n          }\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-STREAM-INF:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'stream-inf'\n        };\n\n        if (match[1]) {\n          event.attributes = parseAttributes(match[1]);\n\n          if (event.attributes.RESOLUTION) {\n            var split = event.attributes.RESOLUTION.split('x');\n            var resolution = {};\n\n            if (split[0]) {\n              resolution.width = parseInt(split[0], 10);\n            }\n\n            if (split[1]) {\n              resolution.height = parseInt(split[1], 10);\n            }\n\n            event.attributes.RESOLUTION = resolution;\n          }\n\n          if (event.attributes.BANDWIDTH) {\n            event.attributes.BANDWIDTH = parseInt(event.attributes.BANDWIDTH, 10);\n          }\n\n          if (event.attributes['PROGRAM-ID']) {\n            event.attributes['PROGRAM-ID'] = parseInt(event.attributes['PROGRAM-ID'], 10);\n          }\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-MEDIA:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'media'\n        };\n\n        if (match[1]) {\n          event.attributes = parseAttributes(match[1]);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-ENDLIST/.exec(newLine);\n\n      if (match) {\n        _this2.trigger('data', {\n          type: 'tag',\n          tagType: 'endlist'\n        });\n\n        return;\n      }\n\n      match = /^#EXT-X-DISCONTINUITY/.exec(newLine);\n\n      if (match) {\n        _this2.trigger('data', {\n          type: 'tag',\n          tagType: 'discontinuity'\n        });\n\n        return;\n      }\n\n      match = /^#EXT-X-PROGRAM-DATE-TIME:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'program-date-time'\n        };\n\n        if (match[1]) {\n          event.dateTimeString = match[1];\n          event.dateTimeObject = new Date(match[1]);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-KEY:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'key'\n        };\n\n        if (match[1]) {\n          event.attributes = parseAttributes(match[1]); // parse the IV string into a Uint32Array\n\n          if (event.attributes.IV) {\n            if (event.attributes.IV.substring(0, 2).toLowerCase() === '0x') {\n              event.attributes.IV = event.attributes.IV.substring(2);\n            }\n\n            event.attributes.IV = event.attributes.IV.match(/.{8}/g);\n            event.attributes.IV[0] = parseInt(event.attributes.IV[0], 16);\n            event.attributes.IV[1] = parseInt(event.attributes.IV[1], 16);\n            event.attributes.IV[2] = parseInt(event.attributes.IV[2], 16);\n            event.attributes.IV[3] = parseInt(event.attributes.IV[3], 16);\n            event.attributes.IV = new Uint32Array(event.attributes.IV);\n          }\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-START:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'start'\n        };\n\n        if (match[1]) {\n          event.attributes = parseAttributes(match[1]);\n          event.attributes['TIME-OFFSET'] = parseFloat(event.attributes['TIME-OFFSET']);\n          event.attributes.PRECISE = /YES/.test(event.attributes.PRECISE);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-CUE-OUT-CONT:?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'cue-out-cont'\n        };\n\n        if (match[1]) {\n          event.data = match[1];\n        } else {\n          event.data = '';\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-CUE-OUT:?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'cue-out'\n        };\n\n        if (match[1]) {\n          event.data = match[1];\n        } else {\n          event.data = '';\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-CUE-IN:?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'cue-in'\n        };\n\n        if (match[1]) {\n          event.data = match[1];\n        } else {\n          event.data = '';\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      } // unknown tag type\n\n\n      _this2.trigger('data', {\n        type: 'tag',\n        data: newLine.slice(4)\n      });\n    });\n  }\n  /**\n   * Add a parser for custom headers\n   *\n   * @param {Object}   options              a map of options for the added parser\n   * @param {RegExp}   options.expression   a regular expression to match the custom header\n   * @param {string}   options.customType   the custom type to register to the output\n   * @param {Function} [options.dataParser] function to parse the line into an object\n   * @param {boolean}  [options.segment]    should tag data be attached to the segment object\n   */\n  ;\n\n  _proto.addParser = function addParser(_ref) {\n    var _this3 = this;\n\n    var expression = _ref.expression,\n        customType = _ref.customType,\n        dataParser = _ref.dataParser,\n        segment = _ref.segment;\n\n    if (typeof dataParser !== 'function') {\n      dataParser = function dataParser(line) {\n        return line;\n      };\n    }\n\n    this.customParsers.push(function (line) {\n      var match = expression.exec(line);\n\n      if (match) {\n        _this3.trigger('data', {\n          type: 'custom',\n          data: dataParser(line),\n          customType: customType,\n          segment: segment\n        });\n\n        return true;\n      }\n    });\n  }\n  /**\n   * Add a custom header mapper\n   *\n   * @param {Object}   options\n   * @param {RegExp}   options.expression   a regular expression to match the custom header\n   * @param {Function} options.map          function to translate tag into a different tag\n   */\n  ;\n\n  _proto.addTagMapper = function addTagMapper(_ref2) {\n    var expression = _ref2.expression,\n        map = _ref2.map;\n\n    var mapFn = function mapFn(line) {\n      if (expression.test(line)) {\n        return map(line);\n      }\n\n      return line;\n    };\n\n    this.tagMappers.push(mapFn);\n  };\n\n  return ParseStream;\n}(Stream);\n\nfunction decodeB64ToUint8Array(b64Text) {\n  var decodedString = window.atob(b64Text || '');\n  var array = new Uint8Array(decodedString.length);\n\n  for (var i = 0; i < decodedString.length; i++) {\n    array[i] = decodedString.charCodeAt(i);\n  }\n\n  return array;\n}\n/**\n * A parser for M3U8 files. The current interpretation of the input is\n * exposed as a property `manifest` on parser objects. It's just two lines to\n * create and parse a manifest once you have the contents available as a string:\n *\n * ```js\n * var parser = new m3u8.Parser();\n * parser.push(xhr.responseText);\n * ```\n *\n * New input can later be applied to update the manifest object by calling\n * `push` again.\n *\n * The parser attempts to create a usable manifest object even if the\n * underlying input is somewhat nonsensical. It emits `info` and `warning`\n * events during the parse if it encounters input that seems invalid or\n * requires some property of the manifest object to be defaulted.\n *\n * @class Parser\n * @extends Stream\n */\n\n\nvar Parser =\n/*#__PURE__*/\nfunction (_Stream) {\n  _inheritsLoose(Parser, _Stream);\n\n  function Parser() {\n    var _this;\n\n    _this = _Stream.call(this) || this;\n    _this.lineStream = new LineStream();\n    _this.parseStream = new ParseStream();\n\n    _this.lineStream.pipe(_this.parseStream);\n    /* eslint-disable consistent-this */\n\n\n    var self = _assertThisInitialized(_this);\n    /* eslint-enable consistent-this */\n\n\n    var uris = [];\n    var currentUri = {}; // if specified, the active EXT-X-MAP definition\n\n    var currentMap; // if specified, the active decryption key\n\n    var _key;\n\n    var noop = function noop() {};\n\n    var defaultMediaGroups = {\n      'AUDIO': {},\n      'VIDEO': {},\n      'CLOSED-CAPTIONS': {},\n      'SUBTITLES': {}\n    }; // This is the Widevine UUID from DASH IF IOP. The same exact string is\n    // used in MPDs with Widevine encrypted streams.\n\n    var widevineUuid = 'urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed'; // group segments into numbered timelines delineated by discontinuities\n\n    var currentTimeline = 0; // the manifest is empty until the parse stream begins delivering data\n\n    _this.manifest = {\n      allowCache: true,\n      discontinuityStarts: [],\n      segments: []\n    }; // update the manifest with the m3u8 entry from the parse stream\n\n    _this.parseStream.on('data', function (entry) {\n      var mediaGroup;\n      var rendition;\n      ({\n        tag: function tag() {\n          // switch based on the tag type\n          (({\n            'allow-cache': function allowCache() {\n              this.manifest.allowCache = entry.allowed;\n\n              if (!('allowed' in entry)) {\n                this.trigger('info', {\n                  message: 'defaulting allowCache to YES'\n                });\n                this.manifest.allowCache = true;\n              }\n            },\n            byterange: function byterange() {\n              var byterange = {};\n\n              if ('length' in entry) {\n                currentUri.byterange = byterange;\n                byterange.length = entry.length;\n\n                if (!('offset' in entry)) {\n                  this.trigger('info', {\n                    message: 'defaulting offset to zero'\n                  });\n                  entry.offset = 0;\n                }\n              }\n\n              if ('offset' in entry) {\n                currentUri.byterange = byterange;\n                byterange.offset = entry.offset;\n              }\n            },\n            endlist: function endlist() {\n              this.manifest.endList = true;\n            },\n            inf: function inf() {\n              if (!('mediaSequence' in this.manifest)) {\n                this.manifest.mediaSequence = 0;\n                this.trigger('info', {\n                  message: 'defaulting media sequence to zero'\n                });\n              }\n\n              if (!('discontinuitySequence' in this.manifest)) {\n                this.manifest.discontinuitySequence = 0;\n                this.trigger('info', {\n                  message: 'defaulting discontinuity sequence to zero'\n                });\n              }\n\n              if (entry.duration > 0) {\n                currentUri.duration = entry.duration;\n              }\n\n              if (entry.duration === 0) {\n                currentUri.duration = 0.01;\n                this.trigger('info', {\n                  message: 'updating zero segment duration to a small value'\n                });\n              }\n\n              this.manifest.segments = uris;\n            },\n            key: function key() {\n              if (!entry.attributes) {\n                this.trigger('warn', {\n                  message: 'ignoring key declaration without attribute list'\n                });\n                return;\n              } // clear the active encryption key\n\n\n              if (entry.attributes.METHOD === 'NONE') {\n                _key = null;\n                return;\n              }\n\n              if (!entry.attributes.URI) {\n                this.trigger('warn', {\n                  message: 'ignoring key declaration without URI'\n                });\n                return;\n              } // check if the content is encrypted for Widevine\n              // Widevine/HLS spec: https://storage.googleapis.com/wvdocs/Widevine_DRM_HLS.pdf\n\n\n              if (entry.attributes.KEYFORMAT === widevineUuid) {\n                var VALID_METHODS = ['SAMPLE-AES', 'SAMPLE-AES-CTR', 'SAMPLE-AES-CENC'];\n\n                if (VALID_METHODS.indexOf(entry.attributes.METHOD) === -1) {\n                  this.trigger('warn', {\n                    message: 'invalid key method provided for Widevine'\n                  });\n                  return;\n                }\n\n                if (entry.attributes.METHOD === 'SAMPLE-AES-CENC') {\n                  this.trigger('warn', {\n                    message: 'SAMPLE-AES-CENC is deprecated, please use SAMPLE-AES-CTR instead'\n                  });\n                }\n\n                if (entry.attributes.URI.substring(0, 23) !== 'data:text/plain;base64,') {\n                  this.trigger('warn', {\n                    message: 'invalid key URI provided for Widevine'\n                  });\n                  return;\n                }\n\n                if (!(entry.attributes.KEYID && entry.attributes.KEYID.substring(0, 2) === '0x')) {\n                  this.trigger('warn', {\n                    message: 'invalid key ID provided for Widevine'\n                  });\n                  return;\n                } // if Widevine key attributes are valid, store them as `contentProtection`\n                // on the manifest to emulate Widevine tag structure in a DASH mpd\n\n\n                this.manifest.contentProtection = {\n                  'com.widevine.alpha': {\n                    attributes: {\n                      schemeIdUri: entry.attributes.KEYFORMAT,\n                      // remove '0x' from the key id string\n                      keyId: entry.attributes.KEYID.substring(2)\n                    },\n                    // decode the base64-encoded PSSH box\n                    pssh: decodeB64ToUint8Array(entry.attributes.URI.split(',')[1])\n                  }\n                };\n                return;\n              }\n\n              if (!entry.attributes.METHOD) {\n                this.trigger('warn', {\n                  message: 'defaulting key method to AES-128'\n                });\n              } // setup an encryption key for upcoming segments\n\n\n              _key = {\n                method: entry.attributes.METHOD || 'AES-128',\n                uri: entry.attributes.URI\n              };\n\n              if (typeof entry.attributes.IV !== 'undefined') {\n                _key.iv = entry.attributes.IV;\n              }\n            },\n            'media-sequence': function mediaSequence() {\n              if (!isFinite(entry.number)) {\n                this.trigger('warn', {\n                  message: 'ignoring invalid media sequence: ' + entry.number\n                });\n                return;\n              }\n\n              this.manifest.mediaSequence = entry.number;\n            },\n            'discontinuity-sequence': function discontinuitySequence() {\n              if (!isFinite(entry.number)) {\n                this.trigger('warn', {\n                  message: 'ignoring invalid discontinuity sequence: ' + entry.number\n                });\n                return;\n              }\n\n              this.manifest.discontinuitySequence = entry.number;\n              currentTimeline = entry.number;\n            },\n            'playlist-type': function playlistType() {\n              if (!/VOD|EVENT/.test(entry.playlistType)) {\n                this.trigger('warn', {\n                  message: 'ignoring unknown playlist type: ' + entry.playlist\n                });\n                return;\n              }\n\n              this.manifest.playlistType = entry.playlistType;\n            },\n            map: function map() {\n              currentMap = {};\n\n              if (entry.uri) {\n                currentMap.uri = entry.uri;\n              }\n\n              if (entry.byterange) {\n                currentMap.byterange = entry.byterange;\n              }\n            },\n            'stream-inf': function streamInf() {\n              this.manifest.playlists = uris;\n              this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups;\n\n              if (!entry.attributes) {\n                this.trigger('warn', {\n                  message: 'ignoring empty stream-inf attributes'\n                });\n                return;\n              }\n\n              if (!currentUri.attributes) {\n                currentUri.attributes = {};\n              }\n\n              _extends(currentUri.attributes, entry.attributes);\n            },\n            media: function media() {\n              this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups;\n\n              if (!(entry.attributes && entry.attributes.TYPE && entry.attributes['GROUP-ID'] && entry.attributes.NAME)) {\n                this.trigger('warn', {\n                  message: 'ignoring incomplete or missing media group'\n                });\n                return;\n              } // find the media group, creating defaults as necessary\n\n\n              var mediaGroupType = this.manifest.mediaGroups[entry.attributes.TYPE];\n              mediaGroupType[entry.attributes['GROUP-ID']] = mediaGroupType[entry.attributes['GROUP-ID']] || {};\n              mediaGroup = mediaGroupType[entry.attributes['GROUP-ID']]; // collect the rendition metadata\n\n              rendition = {\n                default: /yes/i.test(entry.attributes.DEFAULT)\n              };\n\n              if (rendition.default) {\n                rendition.autoselect = true;\n              } else {\n                rendition.autoselect = /yes/i.test(entry.attributes.AUTOSELECT);\n              }\n\n              if (entry.attributes.LANGUAGE) {\n                rendition.language = entry.attributes.LANGUAGE;\n              }\n\n              if (entry.attributes.URI) {\n                rendition.uri = entry.attributes.URI;\n              }\n\n              if (entry.attributes['INSTREAM-ID']) {\n                rendition.instreamId = entry.attributes['INSTREAM-ID'];\n              }\n\n              if (entry.attributes.CHARACTERISTICS) {\n                rendition.characteristics = entry.attributes.CHARACTERISTICS;\n              }\n\n              if (entry.attributes.FORCED) {\n                rendition.forced = /yes/i.test(entry.attributes.FORCED);\n              } // insert the new rendition\n\n\n              mediaGroup[entry.attributes.NAME] = rendition;\n            },\n            discontinuity: function discontinuity() {\n              currentTimeline += 1;\n              currentUri.discontinuity = true;\n              this.manifest.discontinuityStarts.push(uris.length);\n            },\n            'program-date-time': function programDateTime() {\n              if (typeof this.manifest.dateTimeString === 'undefined') {\n                // PROGRAM-DATE-TIME is a media-segment tag, but for backwards\n                // compatibility, we add the first occurence of the PROGRAM-DATE-TIME tag\n                // to the manifest object\n                // TODO: Consider removing this in future major version\n                this.manifest.dateTimeString = entry.dateTimeString;\n                this.manifest.dateTimeObject = entry.dateTimeObject;\n              }\n\n              currentUri.dateTimeString = entry.dateTimeString;\n              currentUri.dateTimeObject = entry.dateTimeObject;\n            },\n            targetduration: function targetduration() {\n              if (!isFinite(entry.duration) || entry.duration < 0) {\n                this.trigger('warn', {\n                  message: 'ignoring invalid target duration: ' + entry.duration\n                });\n                return;\n              }\n\n              this.manifest.targetDuration = entry.duration;\n            },\n            totalduration: function totalduration() {\n              if (!isFinite(entry.duration) || entry.duration < 0) {\n                this.trigger('warn', {\n                  message: 'ignoring invalid total duration: ' + entry.duration\n                });\n                return;\n              }\n\n              this.manifest.totalDuration = entry.duration;\n            },\n            start: function start() {\n              if (!entry.attributes || isNaN(entry.attributes['TIME-OFFSET'])) {\n                this.trigger('warn', {\n                  message: 'ignoring start declaration without appropriate attribute list'\n                });\n                return;\n              }\n\n              this.manifest.start = {\n                timeOffset: entry.attributes['TIME-OFFSET'],\n                precise: entry.attributes.PRECISE\n              };\n            },\n            'cue-out': function cueOut() {\n              currentUri.cueOut = entry.data;\n            },\n            'cue-out-cont': function cueOutCont() {\n              currentUri.cueOutCont = entry.data;\n            },\n            'cue-in': function cueIn() {\n              currentUri.cueIn = entry.data;\n            }\n          })[entry.tagType] || noop).call(self);\n        },\n        uri: function uri() {\n          currentUri.uri = entry.uri;\n          uris.push(currentUri); // if no explicit duration was declared, use the target duration\n\n          if (this.manifest.targetDuration && !('duration' in currentUri)) {\n            this.trigger('warn', {\n              message: 'defaulting segment duration to the target duration'\n            });\n            currentUri.duration = this.manifest.targetDuration;\n          } // annotate with encryption information, if necessary\n\n\n          if (_key) {\n            currentUri.key = _key;\n          }\n\n          currentUri.timeline = currentTimeline; // annotate with initialization segment information, if necessary\n\n          if (currentMap) {\n            currentUri.map = currentMap;\n          } // prepare for the next URI\n\n\n          currentUri = {};\n        },\n        comment: function comment() {// comments are not important for playback\n        },\n        custom: function custom() {\n          // if this is segment-level data attach the output to the segment\n          if (entry.segment) {\n            currentUri.custom = currentUri.custom || {};\n            currentUri.custom[entry.customType] = entry.data; // if this is manifest-level data attach to the top level manifest object\n          } else {\n            this.manifest.custom = this.manifest.custom || {};\n            this.manifest.custom[entry.customType] = entry.data;\n          }\n        }\n      })[entry.type].call(self);\n    });\n\n    return _this;\n  }\n  /**\n   * Parse the input string and update the manifest object.\n   *\n   * @param {string} chunk a potentially incomplete portion of the manifest\n   */\n\n\n  var _proto = Parser.prototype;\n\n  _proto.push = function push(chunk) {\n    this.lineStream.push(chunk);\n  }\n  /**\n   * Flush any remaining input. This can be handy if the last line of an M3U8\n   * manifest did not contain a trailing newline but the file has been\n   * completely received.\n   */\n  ;\n\n  _proto.end = function end() {\n    // flush any buffered input\n    this.lineStream.push('\\n');\n  }\n  /**\n   * Add an additional parser for non-standard tags\n   *\n   * @param {Object}   options              a map of options for the added parser\n   * @param {RegExp}   options.expression   a regular expression to match the custom header\n   * @param {string}   options.type         the type to register to the output\n   * @param {Function} [options.dataParser] function to parse the line into an object\n   * @param {boolean}  [options.segment]    should tag data be attached to the segment object\n   */\n  ;\n\n  _proto.addParser = function addParser(options) {\n    this.parseStream.addParser(options);\n  }\n  /**\n   * Add a custom header mapper\n   *\n   * @param {Object}   options\n   * @param {RegExp}   options.expression   a regular expression to match the custom header\n   * @param {Function} options.map          function to translate tag into a different tag\n   */\n  ;\n\n  _proto.addTagMapper = function addTagMapper(options) {\n    this.parseStream.addTagMapper(options);\n  };\n\n  return Parser;\n}(Stream);\n\nexport { LineStream, ParseStream, Parser };","/*\n * pkcs7.pad\n * https://github.com/brightcove/pkcs7\n *\n * Copyright (c) 2014 Brightcove\n * Licensed under the apache2 license.\n */\nvar PADDING = void 0;\n/**\n * Returns a new Uint8Array that is padded with PKCS#7 padding.\n * @param plaintext {Uint8Array} the input bytes before encryption\n * @return {Uint8Array} the padded bytes\n * @see http://tools.ietf.org/html/rfc5652\n */\n\nfunction pad(plaintext) {\n  var padding = PADDING[plaintext.byteLength % 16 || 0];\n  var result = new Uint8Array(plaintext.byteLength + padding.length);\n  result.set(plaintext);\n  result.set(padding, plaintext.byteLength);\n  return result;\n} // pre-define the padding values\n\n\nPADDING = [[16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16], [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15], [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14], [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13], [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12], [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11], [10, 10, 10, 10, 10, 10, 10, 10, 10, 10], [9, 9, 9, 9, 9, 9, 9, 9, 9], [8, 8, 8, 8, 8, 8, 8, 8], [7, 7, 7, 7, 7, 7, 7], [6, 6, 6, 6, 6, 6], [5, 5, 5, 5, 5], [4, 4, 4, 4], [3, 3, 3], [2, 2], [1]];\n/**\n * Returns the subarray of a Uint8Array without PKCS#7 padding.\n * @param padded {Uint8Array} unencrypted bytes that have been padded\n * @return {Uint8Array} the unpadded bytes\n * @see http://tools.ietf.org/html/rfc5652\n */\n\nfunction unpad(padded) {\n  return padded.subarray(0, padded.byteLength - padded[padded.byteLength - 1]);\n}\n\nvar version = \"1.0.2\";\nexport { pad, unpad, version as VERSION };","import { unpad } from 'pkcs7';\n\nvar classCallCheck = function classCallCheck(instance, Constructor) {\n  if (!(instance instanceof Constructor)) {\n    throw new TypeError(\"Cannot call a class as a function\");\n  }\n};\n\nvar createClass = function () {\n  function defineProperties(target, props) {\n    for (var i = 0; i < props.length; i++) {\n      var descriptor = props[i];\n      descriptor.enumerable = descriptor.enumerable || false;\n      descriptor.configurable = true;\n      if (\"value\" in descriptor) descriptor.writable = true;\n      Object.defineProperty(target, descriptor.key, descriptor);\n    }\n  }\n\n  return function (Constructor, protoProps, staticProps) {\n    if (protoProps) defineProperties(Constructor.prototype, protoProps);\n    if (staticProps) defineProperties(Constructor, staticProps);\n    return Constructor;\n  };\n}();\n\nvar inherits = function inherits(subClass, superClass) {\n  if (typeof superClass !== \"function\" && superClass !== null) {\n    throw new TypeError(\"Super expression must either be null or a function, not \" + typeof superClass);\n  }\n\n  subClass.prototype = Object.create(superClass && superClass.prototype, {\n    constructor: {\n      value: subClass,\n      enumerable: false,\n      writable: true,\n      configurable: true\n    }\n  });\n  if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;\n};\n\nvar possibleConstructorReturn = function possibleConstructorReturn(self, call) {\n  if (!self) {\n    throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n  }\n\n  return call && (typeof call === \"object\" || typeof call === \"function\") ? call : self;\n};\n/**\n * @file aes.js\n *\n * This file contains an adaptation of the AES decryption algorithm\n * from the Standford Javascript Cryptography Library. That work is\n * covered by the following copyright and permissions notice:\n *\n * Copyright 2009-2010 Emily Stark, Mike Hamburg, Dan Boneh.\n * All rights reserved.\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * 1. Redistributions of source code must retain the above copyright\n *    notice, this list of conditions and the following disclaimer.\n *\n * 2. Redistributions in binary form must reproduce the above\n *    copyright notice, this list of conditions and the following\n *    disclaimer in the documentation and/or other materials provided\n *    with the distribution.\n *\n * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR\n * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\n * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\n * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR CONTRIBUTORS BE\n * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\n * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\n * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR\n * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,\n * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE\n * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN\n * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n *\n * The views and conclusions contained in the software and documentation\n * are those of the authors and should not be interpreted as representing\n * official policies, either expressed or implied, of the authors.\n */\n\n/**\n * Expand the S-box tables.\n *\n * @private\n */\n\n\nvar precompute = function precompute() {\n  var tables = [[[], [], [], [], []], [[], [], [], [], []]];\n  var encTable = tables[0];\n  var decTable = tables[1];\n  var sbox = encTable[4];\n  var sboxInv = decTable[4];\n  var i = void 0;\n  var x = void 0;\n  var xInv = void 0;\n  var d = [];\n  var th = [];\n  var x2 = void 0;\n  var x4 = void 0;\n  var x8 = void 0;\n  var s = void 0;\n  var tEnc = void 0;\n  var tDec = void 0; // Compute double and third tables\n\n  for (i = 0; i < 256; i++) {\n    th[(d[i] = i << 1 ^ (i >> 7) * 283) ^ i] = i;\n  }\n\n  for (x = xInv = 0; !sbox[x]; x ^= x2 || 1, xInv = th[xInv] || 1) {\n    // Compute sbox\n    s = xInv ^ xInv << 1 ^ xInv << 2 ^ xInv << 3 ^ xInv << 4;\n    s = s >> 8 ^ s & 255 ^ 99;\n    sbox[x] = s;\n    sboxInv[s] = x; // Compute MixColumns\n\n    x8 = d[x4 = d[x2 = d[x]]];\n    tDec = x8 * 0x1010101 ^ x4 * 0x10001 ^ x2 * 0x101 ^ x * 0x1010100;\n    tEnc = d[s] * 0x101 ^ s * 0x1010100;\n\n    for (i = 0; i < 4; i++) {\n      encTable[i][x] = tEnc = tEnc << 24 ^ tEnc >>> 8;\n      decTable[i][s] = tDec = tDec << 24 ^ tDec >>> 8;\n    }\n  } // Compactify. Considerable speedup on Firefox.\n\n\n  for (i = 0; i < 5; i++) {\n    encTable[i] = encTable[i].slice(0);\n    decTable[i] = decTable[i].slice(0);\n  }\n\n  return tables;\n};\n\nvar aesTables = null;\n/**\n * Schedule out an AES key for both encryption and decryption. This\n * is a low-level class. Use a cipher mode to do bulk encryption.\n *\n * @class AES\n * @param key {Array} The key as an array of 4, 6 or 8 words.\n */\n\nvar AES = function () {\n  function AES(key) {\n    classCallCheck(this, AES);\n    /**\n     * The expanded S-box and inverse S-box tables. These will be computed\n     * on the client so that we don't have to send them down the wire.\n     *\n     * There are two tables, _tables[0] is for encryption and\n     * _tables[1] is for decryption.\n     *\n     * The first 4 sub-tables are the expanded S-box with MixColumns. The\n     * last (_tables[01][4]) is the S-box itself.\n     *\n     * @private\n     */\n    // if we have yet to precompute the S-box tables\n    // do so now\n\n    if (!aesTables) {\n      aesTables = precompute();\n    } // then make a copy of that object for use\n\n\n    this._tables = [[aesTables[0][0].slice(), aesTables[0][1].slice(), aesTables[0][2].slice(), aesTables[0][3].slice(), aesTables[0][4].slice()], [aesTables[1][0].slice(), aesTables[1][1].slice(), aesTables[1][2].slice(), aesTables[1][3].slice(), aesTables[1][4].slice()]];\n    var i = void 0;\n    var j = void 0;\n    var tmp = void 0;\n    var encKey = void 0;\n    var decKey = void 0;\n    var sbox = this._tables[0][4];\n    var decTable = this._tables[1];\n    var keyLen = key.length;\n    var rcon = 1;\n\n    if (keyLen !== 4 && keyLen !== 6 && keyLen !== 8) {\n      throw new Error('Invalid aes key size');\n    }\n\n    encKey = key.slice(0);\n    decKey = [];\n    this._key = [encKey, decKey]; // schedule encryption keys\n\n    for (i = keyLen; i < 4 * keyLen + 28; i++) {\n      tmp = encKey[i - 1]; // apply sbox\n\n      if (i % keyLen === 0 || keyLen === 8 && i % keyLen === 4) {\n        tmp = sbox[tmp >>> 24] << 24 ^ sbox[tmp >> 16 & 255] << 16 ^ sbox[tmp >> 8 & 255] << 8 ^ sbox[tmp & 255]; // shift rows and add rcon\n\n        if (i % keyLen === 0) {\n          tmp = tmp << 8 ^ tmp >>> 24 ^ rcon << 24;\n          rcon = rcon << 1 ^ (rcon >> 7) * 283;\n        }\n      }\n\n      encKey[i] = encKey[i - keyLen] ^ tmp;\n    } // schedule decryption keys\n\n\n    for (j = 0; i; j++, i--) {\n      tmp = encKey[j & 3 ? i : i - 4];\n\n      if (i <= 4 || j < 4) {\n        decKey[j] = tmp;\n      } else {\n        decKey[j] = decTable[0][sbox[tmp >>> 24]] ^ decTable[1][sbox[tmp >> 16 & 255]] ^ decTable[2][sbox[tmp >> 8 & 255]] ^ decTable[3][sbox[tmp & 255]];\n      }\n    }\n  }\n  /**\n   * Decrypt 16 bytes, specified as four 32-bit words.\n   *\n   * @param {Number} encrypted0 the first word to decrypt\n   * @param {Number} encrypted1 the second word to decrypt\n   * @param {Number} encrypted2 the third word to decrypt\n   * @param {Number} encrypted3 the fourth word to decrypt\n   * @param {Int32Array} out the array to write the decrypted words\n   * into\n   * @param {Number} offset the offset into the output array to start\n   * writing results\n   * @return {Array} The plaintext.\n   */\n\n\n  AES.prototype.decrypt = function decrypt(encrypted0, encrypted1, encrypted2, encrypted3, out, offset) {\n    var key = this._key[1]; // state variables a,b,c,d are loaded with pre-whitened data\n\n    var a = encrypted0 ^ key[0];\n    var b = encrypted3 ^ key[1];\n    var c = encrypted2 ^ key[2];\n    var d = encrypted1 ^ key[3];\n    var a2 = void 0;\n    var b2 = void 0;\n    var c2 = void 0; // key.length === 2 ?\n\n    var nInnerRounds = key.length / 4 - 2;\n    var i = void 0;\n    var kIndex = 4;\n    var table = this._tables[1]; // load up the tables\n\n    var table0 = table[0];\n    var table1 = table[1];\n    var table2 = table[2];\n    var table3 = table[3];\n    var sbox = table[4]; // Inner rounds. Cribbed from OpenSSL.\n\n    for (i = 0; i < nInnerRounds; i++) {\n      a2 = table0[a >>> 24] ^ table1[b >> 16 & 255] ^ table2[c >> 8 & 255] ^ table3[d & 255] ^ key[kIndex];\n      b2 = table0[b >>> 24] ^ table1[c >> 16 & 255] ^ table2[d >> 8 & 255] ^ table3[a & 255] ^ key[kIndex + 1];\n      c2 = table0[c >>> 24] ^ table1[d >> 16 & 255] ^ table2[a >> 8 & 255] ^ table3[b & 255] ^ key[kIndex + 2];\n      d = table0[d >>> 24] ^ table1[a >> 16 & 255] ^ table2[b >> 8 & 255] ^ table3[c & 255] ^ key[kIndex + 3];\n      kIndex += 4;\n      a = a2;\n      b = b2;\n      c = c2;\n    } // Last round.\n\n\n    for (i = 0; i < 4; i++) {\n      out[(3 & -i) + offset] = sbox[a >>> 24] << 24 ^ sbox[b >> 16 & 255] << 16 ^ sbox[c >> 8 & 255] << 8 ^ sbox[d & 255] ^ key[kIndex++];\n      a2 = a;\n      a = b;\n      b = c;\n      c = d;\n      d = a2;\n    }\n  };\n\n  return AES;\n}();\n/**\n * @file stream.js\n */\n\n/**\n * A lightweight readable stream implemention that handles event dispatching.\n *\n * @class Stream\n */\n\n\nvar Stream = function () {\n  function Stream() {\n    classCallCheck(this, Stream);\n    this.listeners = {};\n  }\n  /**\n   * Add a listener for a specified event type.\n   *\n   * @param {String} type the event name\n   * @param {Function} listener the callback to be invoked when an event of\n   * the specified type occurs\n   */\n\n\n  Stream.prototype.on = function on(type, listener) {\n    if (!this.listeners[type]) {\n      this.listeners[type] = [];\n    }\n\n    this.listeners[type].push(listener);\n  };\n  /**\n   * Remove a listener for a specified event type.\n   *\n   * @param {String} type the event name\n   * @param {Function} listener  a function previously registered for this\n   * type of event through `on`\n   * @return {Boolean} if we could turn it off or not\n   */\n\n\n  Stream.prototype.off = function off(type, listener) {\n    if (!this.listeners[type]) {\n      return false;\n    }\n\n    var index = this.listeners[type].indexOf(listener);\n    this.listeners[type].splice(index, 1);\n    return index > -1;\n  };\n  /**\n   * Trigger an event of the specified type on this stream. Any additional\n   * arguments to this function are passed as parameters to event listeners.\n   *\n   * @param {String} type the event name\n   */\n\n\n  Stream.prototype.trigger = function trigger(type) {\n    var callbacks = this.listeners[type];\n\n    if (!callbacks) {\n      return;\n    } // Slicing the arguments on every invocation of this method\n    // can add a significant amount of overhead. Avoid the\n    // intermediate object creation for the common case of a\n    // single callback argument\n\n\n    if (arguments.length === 2) {\n      var length = callbacks.length;\n\n      for (var i = 0; i < length; ++i) {\n        callbacks[i].call(this, arguments[1]);\n      }\n    } else {\n      var args = Array.prototype.slice.call(arguments, 1);\n      var _length = callbacks.length;\n\n      for (var _i = 0; _i < _length; ++_i) {\n        callbacks[_i].apply(this, args);\n      }\n    }\n  };\n  /**\n   * Destroys the stream and cleans up.\n   */\n\n\n  Stream.prototype.dispose = function dispose() {\n    this.listeners = {};\n  };\n  /**\n   * Forwards all `data` events on this stream to the destination stream. The\n   * destination stream should provide a method `push` to receive the data\n   * events as they arrive.\n   *\n   * @param {Stream} destination the stream that will receive all `data` events\n   * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n   */\n\n\n  Stream.prototype.pipe = function pipe(destination) {\n    this.on('data', function (data) {\n      destination.push(data);\n    });\n  };\n\n  return Stream;\n}();\n/**\n * @file async-stream.js\n */\n\n/**\n * A wrapper around the Stream class to use setTiemout\n * and run stream \"jobs\" Asynchronously\n *\n * @class AsyncStream\n * @extends Stream\n */\n\n\nvar AsyncStream = function (_Stream) {\n  inherits(AsyncStream, _Stream);\n\n  function AsyncStream() {\n    classCallCheck(this, AsyncStream);\n\n    var _this = possibleConstructorReturn(this, _Stream.call(this, Stream));\n\n    _this.jobs = [];\n    _this.delay = 1;\n    _this.timeout_ = null;\n    return _this;\n  }\n  /**\n   * process an async job\n   *\n   * @private\n   */\n\n\n  AsyncStream.prototype.processJob_ = function processJob_() {\n    this.jobs.shift()();\n\n    if (this.jobs.length) {\n      this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);\n    } else {\n      this.timeout_ = null;\n    }\n  };\n  /**\n   * push a job into the stream\n   *\n   * @param {Function} job the job to push into the stream\n   */\n\n\n  AsyncStream.prototype.push = function push(job) {\n    this.jobs.push(job);\n\n    if (!this.timeout_) {\n      this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);\n    }\n  };\n\n  return AsyncStream;\n}(Stream);\n/**\n * @file decrypter.js\n *\n * An asynchronous implementation of AES-128 CBC decryption with\n * PKCS#7 padding.\n */\n\n/**\n * Convert network-order (big-endian) bytes into their little-endian\n * representation.\n */\n\n\nvar ntoh = function ntoh(word) {\n  return word << 24 | (word & 0xff00) << 8 | (word & 0xff0000) >> 8 | word >>> 24;\n};\n/**\n * Decrypt bytes using AES-128 with CBC and PKCS#7 padding.\n *\n * @param {Uint8Array} encrypted the encrypted bytes\n * @param {Uint32Array} key the bytes of the decryption key\n * @param {Uint32Array} initVector the initialization vector (IV) to\n * use for the first round of CBC.\n * @return {Uint8Array} the decrypted bytes\n *\n * @see http://en.wikipedia.org/wiki/Advanced_Encryption_Standard\n * @see http://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Cipher_Block_Chaining_.28CBC.29\n * @see https://tools.ietf.org/html/rfc2315\n */\n\n\nvar decrypt = function decrypt(encrypted, key, initVector) {\n  // word-level access to the encrypted bytes\n  var encrypted32 = new Int32Array(encrypted.buffer, encrypted.byteOffset, encrypted.byteLength >> 2);\n  var decipher = new AES(Array.prototype.slice.call(key)); // byte and word-level access for the decrypted output\n\n  var decrypted = new Uint8Array(encrypted.byteLength);\n  var decrypted32 = new Int32Array(decrypted.buffer); // temporary variables for working with the IV, encrypted, and\n  // decrypted data\n\n  var init0 = void 0;\n  var init1 = void 0;\n  var init2 = void 0;\n  var init3 = void 0;\n  var encrypted0 = void 0;\n  var encrypted1 = void 0;\n  var encrypted2 = void 0;\n  var encrypted3 = void 0; // iteration variable\n\n  var wordIx = void 0; // pull out the words of the IV to ensure we don't modify the\n  // passed-in reference and easier access\n\n  init0 = initVector[0];\n  init1 = initVector[1];\n  init2 = initVector[2];\n  init3 = initVector[3]; // decrypt four word sequences, applying cipher-block chaining (CBC)\n  // to each decrypted block\n\n  for (wordIx = 0; wordIx < encrypted32.length; wordIx += 4) {\n    // convert big-endian (network order) words into little-endian\n    // (javascript order)\n    encrypted0 = ntoh(encrypted32[wordIx]);\n    encrypted1 = ntoh(encrypted32[wordIx + 1]);\n    encrypted2 = ntoh(encrypted32[wordIx + 2]);\n    encrypted3 = ntoh(encrypted32[wordIx + 3]); // decrypt the block\n\n    decipher.decrypt(encrypted0, encrypted1, encrypted2, encrypted3, decrypted32, wordIx); // XOR with the IV, and restore network byte-order to obtain the\n    // plaintext\n\n    decrypted32[wordIx] = ntoh(decrypted32[wordIx] ^ init0);\n    decrypted32[wordIx + 1] = ntoh(decrypted32[wordIx + 1] ^ init1);\n    decrypted32[wordIx + 2] = ntoh(decrypted32[wordIx + 2] ^ init2);\n    decrypted32[wordIx + 3] = ntoh(decrypted32[wordIx + 3] ^ init3); // setup the IV for the next round\n\n    init0 = encrypted0;\n    init1 = encrypted1;\n    init2 = encrypted2;\n    init3 = encrypted3;\n  }\n\n  return decrypted;\n};\n/**\n * The `Decrypter` class that manages decryption of AES\n * data through `AsyncStream` objects and the `decrypt`\n * function\n *\n * @param {Uint8Array} encrypted the encrypted bytes\n * @param {Uint32Array} key the bytes of the decryption key\n * @param {Uint32Array} initVector the initialization vector (IV) to\n * @param {Function} done the function to run when done\n * @class Decrypter\n */\n\n\nvar Decrypter = function () {\n  function Decrypter(encrypted, key, initVector, done) {\n    classCallCheck(this, Decrypter);\n    var step = Decrypter.STEP;\n    var encrypted32 = new Int32Array(encrypted.buffer);\n    var decrypted = new Uint8Array(encrypted.byteLength);\n    var i = 0;\n    this.asyncStream_ = new AsyncStream(); // split up the encryption job and do the individual chunks asynchronously\n\n    this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));\n\n    for (i = step; i < encrypted32.length; i += step) {\n      initVector = new Uint32Array([ntoh(encrypted32[i - 4]), ntoh(encrypted32[i - 3]), ntoh(encrypted32[i - 2]), ntoh(encrypted32[i - 1])]);\n      this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));\n    } // invoke the done() callback when everything is finished\n\n\n    this.asyncStream_.push(function () {\n      // remove pkcs#7 padding from the decrypted bytes\n      done(null, unpad(decrypted));\n    });\n  }\n  /**\n   * a getter for step the maximum number of bytes to process at one time\n   *\n   * @return {Number} the value of step 32000\n   */\n\n  /**\n   * @private\n   */\n\n\n  Decrypter.prototype.decryptChunk_ = function decryptChunk_(encrypted, key, initVector, decrypted) {\n    return function () {\n      var bytes = decrypt(encrypted, key, initVector);\n      decrypted.set(bytes, encrypted.byteOffset);\n    };\n  };\n\n  createClass(Decrypter, null, [{\n    key: 'STEP',\n    get: function get$$1() {\n      // 4 * 8000;\n      return 32000;\n    }\n  }]);\n  return Decrypter;\n}();\n/**\n * @file index.js\n *\n * Index module to easily import the primary components of AES-128\n * decryption. Like this:\n *\n * ```js\n * import {Decrypter, decrypt, AsyncStream} from 'aes-decrypter';\n * ```\n */\n\n\nexport { decrypt, Decrypter, AsyncStream };","/**\n * @license\n * Video.js 7.6.5 <http://videojs.com/>\n * Copyright Brightcove, Inc. <https://www.brightcove.com/>\n * Available under Apache License Version 2.0\n * <https://github.com/videojs/video.js/blob/master/LICENSE>\n *\n * Includes vtt.js <https://github.com/mozilla/vtt.js>\n * Available under Apache License Version 2.0\n * <https://github.com/mozilla/vtt.js/blob/master/LICENSE>\n */\nimport window$1 from 'global/window';\nimport document from 'global/document';\nimport safeParseTuple from 'safe-json-parse/tuple';\nimport keycode from 'keycode';\nimport XHR from 'xhr';\nimport vtt from 'videojs-vtt.js';\nimport URLToolkit from 'url-toolkit';\nimport { Parser } from 'm3u8-parser';\nimport { parse, parseUTCTiming } from 'mpd-parser';\nimport mp4Inspector from 'mux.js/lib/tools/mp4-inspector';\nimport mp4probe from 'mux.js/lib/mp4/probe';\nimport CaptionParser from 'mux.js/lib/mp4/caption-parser';\nimport tsInspector from 'mux.js/lib/tools/ts-inspector.js';\nimport { Decrypter, AsyncStream, decrypt } from 'aes-decrypter';\nvar version = \"7.6.5\";\n/**\n * @file create-logger.js\n * @module create-logger\n */\n\nvar history = [];\n/**\n * Log messages to the console and history based on the type of message\n *\n * @private\n * @param  {string} type\n *         The name of the console method to use.\n *\n * @param  {Array} args\n *         The arguments to be passed to the matching console method.\n */\n\nvar LogByTypeFactory = function LogByTypeFactory(name, log) {\n  return function (type, level, args) {\n    var lvl = log.levels[level];\n    var lvlRegExp = new RegExp(\"^(\" + lvl + \")$\");\n\n    if (type !== 'log') {\n      // Add the type to the front of the message when it's not \"log\".\n      args.unshift(type.toUpperCase() + ':');\n    } // Add console prefix after adding to history.\n\n\n    args.unshift(name + ':'); // Add a clone of the args at this point to history.\n\n    if (history) {\n      history.push([].concat(args));\n    } // If there's no console then don't try to output messages, but they will\n    // still be stored in history.\n\n\n    if (!window$1.console) {\n      return;\n    } // Was setting these once outside of this function, but containing them\n    // in the function makes it easier to test cases where console doesn't exist\n    // when the module is executed.\n\n\n    var fn = window$1.console[type];\n\n    if (!fn && type === 'debug') {\n      // Certain browsers don't have support for console.debug. For those, we\n      // should default to the closest comparable log.\n      fn = window$1.console.info || window$1.console.log;\n    } // Bail out if there's no console or if this type is not allowed by the\n    // current logging level.\n\n\n    if (!fn || !lvl || !lvlRegExp.test(type)) {\n      return;\n    }\n\n    fn[Array.isArray(args) ? 'apply' : 'call'](window$1.console, args);\n  };\n};\n\nfunction createLogger(name) {\n  // This is the private tracking variable for logging level.\n  var level = 'info'; // the curried logByType bound to the specific log and history\n\n  var logByType;\n  /**\n   * Logs plain debug messages. Similar to `console.log`.\n   *\n   * Due to [limitations](https://github.com/jsdoc3/jsdoc/issues/955#issuecomment-313829149)\n   * of our JSDoc template, we cannot properly document this as both a function\n   * and a namespace, so its function signature is documented here.\n   *\n   * #### Arguments\n   * ##### *args\n   * Mixed[]\n   *\n   * Any combination of values that could be passed to `console.log()`.\n   *\n   * #### Return Value\n   *\n   * `undefined`\n   *\n   * @namespace\n   * @param    {Mixed[]} args\n   *           One or more messages or objects that should be logged.\n   */\n\n  var log = function log() {\n    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    logByType('log', level, args);\n  }; // This is the logByType helper that the logging methods below use\n\n\n  logByType = LogByTypeFactory(name, log);\n  /**\n   * Create a new sublogger which chains the old name to the new name.\n   *\n   * For example, doing `videojs.log.createLogger('player')` and then using that logger will log the following:\n   * ```js\n   *  mylogger('foo');\n   *  // > VIDEOJS: player: foo\n   * ```\n   *\n   * @param {string} name\n   *        The name to add call the new logger\n   * @return {Object}\n   */\n\n  log.createLogger = function (subname) {\n    return createLogger(name + ': ' + subname);\n  };\n  /**\n   * Enumeration of available logging levels, where the keys are the level names\n   * and the values are `|`-separated strings containing logging methods allowed\n   * in that logging level. These strings are used to create a regular expression\n   * matching the function name being called.\n   *\n   * Levels provided by Video.js are:\n   *\n   * - `off`: Matches no calls. Any value that can be cast to `false` will have\n   *   this effect. The most restrictive.\n   * - `all`: Matches only Video.js-provided functions (`debug`, `log`,\n   *   `log.warn`, and `log.error`).\n   * - `debug`: Matches `log.debug`, `log`, `log.warn`, and `log.error` calls.\n   * - `info` (default): Matches `log`, `log.warn`, and `log.error` calls.\n   * - `warn`: Matches `log.warn` and `log.error` calls.\n   * - `error`: Matches only `log.error` calls.\n   *\n   * @type {Object}\n   */\n\n\n  log.levels = {\n    all: 'debug|log|warn|error',\n    off: '',\n    debug: 'debug|log|warn|error',\n    info: 'log|warn|error',\n    warn: 'warn|error',\n    error: 'error',\n    DEFAULT: level\n  };\n  /**\n   * Get or set the current logging level.\n   *\n   * If a string matching a key from {@link module:log.levels} is provided, acts\n   * as a setter.\n   *\n   * @param  {string} [lvl]\n   *         Pass a valid level to set a new logging level.\n   *\n   * @return {string}\n   *         The current logging level.\n   */\n\n  log.level = function (lvl) {\n    if (typeof lvl === 'string') {\n      if (!log.levels.hasOwnProperty(lvl)) {\n        throw new Error(\"\\\"\" + lvl + \"\\\" in not a valid log level\");\n      }\n\n      level = lvl;\n    }\n\n    return level;\n  };\n  /**\n   * Returns an array containing everything that has been logged to the history.\n   *\n   * This array is a shallow clone of the internal history record. However, its\n   * contents are _not_ cloned; so, mutating objects inside this array will\n   * mutate them in history.\n   *\n   * @return {Array}\n   */\n\n\n  log.history = function () {\n    return history ? [].concat(history) : [];\n  };\n  /**\n   * Allows you to filter the history by the given logger name\n   *\n   * @param {string} fname\n   *        The name to filter by\n   *\n   * @return {Array}\n   *         The filtered list to return\n   */\n\n\n  log.history.filter = function (fname) {\n    return (history || []).filter(function (historyItem) {\n      // if the first item in each historyItem includes `fname`, then it's a match\n      return new RegExp(\".*\" + fname + \".*\").test(historyItem[0]);\n    });\n  };\n  /**\n   * Clears the internal history tracking, but does not prevent further history\n   * tracking.\n   */\n\n\n  log.history.clear = function () {\n    if (history) {\n      history.length = 0;\n    }\n  };\n  /**\n   * Disable history tracking if it is currently enabled.\n   */\n\n\n  log.history.disable = function () {\n    if (history !== null) {\n      history.length = 0;\n      history = null;\n    }\n  };\n  /**\n   * Enable history tracking if it is currently disabled.\n   */\n\n\n  log.history.enable = function () {\n    if (history === null) {\n      history = [];\n    }\n  };\n  /**\n   * Logs error messages. Similar to `console.error`.\n   *\n   * @param {Mixed[]} args\n   *        One or more messages or objects that should be logged as an error\n   */\n\n\n  log.error = function () {\n    for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n      args[_key2] = arguments[_key2];\n    }\n\n    return logByType('error', level, args);\n  };\n  /**\n   * Logs warning messages. Similar to `console.warn`.\n   *\n   * @param {Mixed[]} args\n   *        One or more messages or objects that should be logged as a warning.\n   */\n\n\n  log.warn = function () {\n    for (var _len3 = arguments.length, args = new Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {\n      args[_key3] = arguments[_key3];\n    }\n\n    return logByType('warn', level, args);\n  };\n  /**\n   * Logs debug messages. Similar to `console.debug`, but may also act as a comparable\n   * log if `console.debug` is not available\n   *\n   * @param {Mixed[]} args\n   *        One or more messages or objects that should be logged as debug.\n   */\n\n\n  log.debug = function () {\n    for (var _len4 = arguments.length, args = new Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {\n      args[_key4] = arguments[_key4];\n    }\n\n    return logByType('debug', level, args);\n  };\n\n  return log;\n}\n/**\n * @file log.js\n * @module log\n */\n\n\nvar log = createLogger('VIDEOJS');\nvar createLogger$1 = log.createLogger;\n/**\n * @file obj.js\n * @module obj\n */\n\n/**\n * @callback obj:EachCallback\n *\n * @param {Mixed} value\n *        The current key for the object that is being iterated over.\n *\n * @param {string} key\n *        The current key-value for object that is being iterated over\n */\n\n/**\n * @callback obj:ReduceCallback\n *\n * @param {Mixed} accum\n *        The value that is accumulating over the reduce loop.\n *\n * @param {Mixed} value\n *        The current key for the object that is being iterated over.\n *\n * @param {string} key\n *        The current key-value for object that is being iterated over\n *\n * @return {Mixed}\n *         The new accumulated value.\n */\n\nvar toString = Object.prototype.toString;\n/**\n * Get the keys of an Object\n *\n * @param {Object}\n *        The Object to get the keys from\n *\n * @return {string[]}\n *         An array of the keys from the object. Returns an empty array if the\n *         object passed in was invalid or had no keys.\n *\n * @private\n */\n\nvar keys = function keys(object) {\n  return isObject(object) ? Object.keys(object) : [];\n};\n/**\n * Array-like iteration for objects.\n *\n * @param {Object} object\n *        The object to iterate over\n *\n * @param {obj:EachCallback} fn\n *        The callback function which is called for each key in the object.\n */\n\n\nfunction each(object, fn) {\n  keys(object).forEach(function (key) {\n    return fn(object[key], key);\n  });\n}\n/**\n * Array-like reduce for objects.\n *\n * @param {Object} object\n *        The Object that you want to reduce.\n *\n * @param {Function} fn\n *         A callback function which is called for each key in the object. It\n *         receives the accumulated value and the per-iteration value and key\n *         as arguments.\n *\n * @param {Mixed} [initial = 0]\n *        Starting value\n *\n * @return {Mixed}\n *         The final accumulated value.\n */\n\n\nfunction reduce(object, fn, initial) {\n  if (initial === void 0) {\n    initial = 0;\n  }\n\n  return keys(object).reduce(function (accum, key) {\n    return fn(accum, object[key], key);\n  }, initial);\n}\n/**\n * Object.assign-style object shallow merge/extend.\n *\n * @param  {Object} target\n * @param  {Object} ...sources\n * @return {Object}\n */\n\n\nfunction assign(target) {\n  for (var _len = arguments.length, sources = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {\n    sources[_key - 1] = arguments[_key];\n  }\n\n  if (Object.assign) {\n    return Object.assign.apply(Object, [target].concat(sources));\n  }\n\n  sources.forEach(function (source) {\n    if (!source) {\n      return;\n    }\n\n    each(source, function (value, key) {\n      target[key] = value;\n    });\n  });\n  return target;\n}\n/**\n * Returns whether a value is an object of any kind - including DOM nodes,\n * arrays, regular expressions, etc. Not functions, though.\n *\n * This avoids the gotcha where using `typeof` on a `null` value\n * results in `'object'`.\n *\n * @param  {Object} value\n * @return {boolean}\n */\n\n\nfunction isObject(value) {\n  return !!value && typeof value === 'object';\n}\n/**\n * Returns whether an object appears to be a \"plain\" object - that is, a\n * direct instance of `Object`.\n *\n * @param  {Object} value\n * @return {boolean}\n */\n\n\nfunction isPlain(value) {\n  return isObject(value) && toString.call(value) === '[object Object]' && value.constructor === Object;\n}\n/**\n * @file computed-style.js\n * @module computed-style\n */\n\n/**\n * A safe getComputedStyle.\n *\n * This is needed because in Firefox, if the player is loaded in an iframe with\n * `display:none`, then `getComputedStyle` returns `null`, so, we do a\n * null-check to make sure that the player doesn't break in these cases.\n *\n * @function\n * @param    {Element} el\n *           The element you want the computed style of\n *\n * @param    {string} prop\n *           The property name you want\n *\n * @see      https://bugzilla.mozilla.org/show_bug.cgi?id=548397\n */\n\n\nfunction computedStyle(el, prop) {\n  if (!el || !prop) {\n    return '';\n  }\n\n  if (typeof window$1.getComputedStyle === 'function') {\n    var computedStyleValue = window$1.getComputedStyle(el);\n    return computedStyleValue ? computedStyleValue.getPropertyValue(prop) || computedStyleValue[prop] : '';\n  }\n\n  return '';\n}\n/**\n * @file dom.js\n * @module dom\n */\n\n/**\n * Detect if a value is a string with any non-whitespace characters.\n *\n * @private\n * @param  {string} str\n *         The string to check\n *\n * @return {boolean}\n *         Will be `true` if the string is non-blank, `false` otherwise.\n *\n */\n\n\nfunction isNonBlankString(str) {\n  return typeof str === 'string' && /\\S/.test(str);\n}\n/**\n * Throws an error if the passed string has whitespace. This is used by\n * class methods to be relatively consistent with the classList API.\n *\n * @private\n * @param  {string} str\n *         The string to check for whitespace.\n *\n * @throws {Error}\n *         Throws an error if there is whitespace in the string.\n */\n\n\nfunction throwIfWhitespace(str) {\n  if (/\\s/.test(str)) {\n    throw new Error('class has illegal whitespace characters');\n  }\n}\n/**\n * Produce a regular expression for matching a className within an elements className.\n *\n * @private\n * @param  {string} className\n *         The className to generate the RegExp for.\n *\n * @return {RegExp}\n *         The RegExp that will check for a specific `className` in an elements\n *         className.\n */\n\n\nfunction classRegExp(className) {\n  return new RegExp('(^|\\\\s)' + className + '($|\\\\s)');\n}\n/**\n * Whether the current DOM interface appears to be real (i.e. not simulated).\n *\n * @return {boolean}\n *         Will be `true` if the DOM appears to be real, `false` otherwise.\n */\n\n\nfunction isReal() {\n  // Both document and window will never be undefined thanks to `global`.\n  return document === window$1.document;\n}\n/**\n * Determines, via duck typing, whether or not a value is a DOM element.\n *\n * @param  {Mixed} value\n *         The value to check.\n *\n * @return {boolean}\n *         Will be `true` if the value is a DOM element, `false` otherwise.\n */\n\n\nfunction isEl(value) {\n  return isObject(value) && value.nodeType === 1;\n}\n/**\n * Determines if the current DOM is embedded in an iframe.\n *\n * @return {boolean}\n *         Will be `true` if the DOM is embedded in an iframe, `false`\n *         otherwise.\n */\n\n\nfunction isInFrame() {\n  // We need a try/catch here because Safari will throw errors when attempting\n  // to get either `parent` or `self`\n  try {\n    return window$1.parent !== window$1.self;\n  } catch (x) {\n    return true;\n  }\n}\n/**\n * Creates functions to query the DOM using a given method.\n *\n * @private\n * @param   {string} method\n *          The method to create the query with.\n *\n * @return  {Function}\n *          The query method\n */\n\n\nfunction createQuerier(method) {\n  return function (selector, context) {\n    if (!isNonBlankString(selector)) {\n      return document[method](null);\n    }\n\n    if (isNonBlankString(context)) {\n      context = document.querySelector(context);\n    }\n\n    var ctx = isEl(context) ? context : document;\n    return ctx[method] && ctx[method](selector);\n  };\n}\n/**\n * Creates an element and applies properties, attributes, and inserts content.\n *\n * @param  {string} [tagName='div']\n *         Name of tag to be created.\n *\n * @param  {Object} [properties={}]\n *         Element properties to be applied.\n *\n * @param  {Object} [attributes={}]\n *         Element attributes to be applied.\n *\n * @param {module:dom~ContentDescriptor} content\n *        A content descriptor object.\n *\n * @return {Element}\n *         The element that was created.\n */\n\n\nfunction createEl(tagName, properties, attributes, content) {\n  if (tagName === void 0) {\n    tagName = 'div';\n  }\n\n  if (properties === void 0) {\n    properties = {};\n  }\n\n  if (attributes === void 0) {\n    attributes = {};\n  }\n\n  var el = document.createElement(tagName);\n  Object.getOwnPropertyNames(properties).forEach(function (propName) {\n    var val = properties[propName]; // See #2176\n    // We originally were accepting both properties and attributes in the\n    // same object, but that doesn't work so well.\n\n    if (propName.indexOf('aria-') !== -1 || propName === 'role' || propName === 'type') {\n      log.warn('Setting attributes in the second argument of createEl()\\n' + 'has been deprecated. Use the third argument instead.\\n' + (\"createEl(type, properties, attributes). Attempting to set \" + propName + \" to \" + val + \".\"));\n      el.setAttribute(propName, val); // Handle textContent since it's not supported everywhere and we have a\n      // method for it.\n    } else if (propName === 'textContent') {\n      textContent(el, val);\n    } else {\n      el[propName] = val;\n    }\n  });\n  Object.getOwnPropertyNames(attributes).forEach(function (attrName) {\n    el.setAttribute(attrName, attributes[attrName]);\n  });\n\n  if (content) {\n    appendContent(el, content);\n  }\n\n  return el;\n}\n/**\n * Injects text into an element, replacing any existing contents entirely.\n *\n * @param  {Element} el\n *         The element to add text content into\n *\n * @param  {string} text\n *         The text content to add.\n *\n * @return {Element}\n *         The element with added text content.\n */\n\n\nfunction textContent(el, text) {\n  if (typeof el.textContent === 'undefined') {\n    el.innerText = text;\n  } else {\n    el.textContent = text;\n  }\n\n  return el;\n}\n/**\n * Insert an element as the first child node of another\n *\n * @param {Element} child\n *        Element to insert\n *\n * @param {Element} parent\n *        Element to insert child into\n */\n\n\nfunction prependTo(child, parent) {\n  if (parent.firstChild) {\n    parent.insertBefore(child, parent.firstChild);\n  } else {\n    parent.appendChild(child);\n  }\n}\n/**\n * Check if an element has a class name.\n *\n * @param  {Element} element\n *         Element to check\n *\n * @param  {string} classToCheck\n *         Class name to check for\n *\n * @return {boolean}\n *         Will be `true` if the element has a class, `false` otherwise.\n *\n * @throws {Error}\n *         Throws an error if `classToCheck` has white space.\n */\n\n\nfunction hasClass(element, classToCheck) {\n  throwIfWhitespace(classToCheck);\n\n  if (element.classList) {\n    return element.classList.contains(classToCheck);\n  }\n\n  return classRegExp(classToCheck).test(element.className);\n}\n/**\n * Add a class name to an element.\n *\n * @param  {Element} element\n *         Element to add class name to.\n *\n * @param  {string} classToAdd\n *         Class name to add.\n *\n * @return {Element}\n *         The DOM element with the added class name.\n */\n\n\nfunction addClass(element, classToAdd) {\n  if (element.classList) {\n    element.classList.add(classToAdd); // Don't need to `throwIfWhitespace` here because `hasElClass` will do it\n    // in the case of classList not being supported.\n  } else if (!hasClass(element, classToAdd)) {\n    element.className = (element.className + ' ' + classToAdd).trim();\n  }\n\n  return element;\n}\n/**\n * Remove a class name from an element.\n *\n * @param  {Element} element\n *         Element to remove a class name from.\n *\n * @param  {string} classToRemove\n *         Class name to remove\n *\n * @return {Element}\n *         The DOM element with class name removed.\n */\n\n\nfunction removeClass(element, classToRemove) {\n  if (element.classList) {\n    element.classList.remove(classToRemove);\n  } else {\n    throwIfWhitespace(classToRemove);\n    element.className = element.className.split(/\\s+/).filter(function (c) {\n      return c !== classToRemove;\n    }).join(' ');\n  }\n\n  return element;\n}\n/**\n * The callback definition for toggleClass.\n *\n * @callback module:dom~PredicateCallback\n * @param    {Element} element\n *           The DOM element of the Component.\n *\n * @param    {string} classToToggle\n *           The `className` that wants to be toggled\n *\n * @return   {boolean|undefined}\n *           If `true` is returned, the `classToToggle` will be added to the\n *           `element`. If `false`, the `classToToggle` will be removed from\n *           the `element`. If `undefined`, the callback will be ignored.\n */\n\n/**\n * Adds or removes a class name to/from an element depending on an optional\n * condition or the presence/absence of the class name.\n *\n * @param  {Element} element\n *         The element to toggle a class name on.\n *\n * @param  {string} classToToggle\n *         The class that should be toggled.\n *\n * @param  {boolean|module:dom~PredicateCallback} [predicate]\n *         See the return value for {@link module:dom~PredicateCallback}\n *\n * @return {Element}\n *         The element with a class that has been toggled.\n */\n\n\nfunction toggleClass(element, classToToggle, predicate) {\n  // This CANNOT use `classList` internally because IE11 does not support the\n  // second parameter to the `classList.toggle()` method! Which is fine because\n  // `classList` will be used by the add/remove functions.\n  var has = hasClass(element, classToToggle);\n\n  if (typeof predicate === 'function') {\n    predicate = predicate(element, classToToggle);\n  }\n\n  if (typeof predicate !== 'boolean') {\n    predicate = !has;\n  } // If the necessary class operation matches the current state of the\n  // element, no action is required.\n\n\n  if (predicate === has) {\n    return;\n  }\n\n  if (predicate) {\n    addClass(element, classToToggle);\n  } else {\n    removeClass(element, classToToggle);\n  }\n\n  return element;\n}\n/**\n * Apply attributes to an HTML element.\n *\n * @param {Element} el\n *        Element to add attributes to.\n *\n * @param {Object} [attributes]\n *        Attributes to be applied.\n */\n\n\nfunction setAttributes(el, attributes) {\n  Object.getOwnPropertyNames(attributes).forEach(function (attrName) {\n    var attrValue = attributes[attrName];\n\n    if (attrValue === null || typeof attrValue === 'undefined' || attrValue === false) {\n      el.removeAttribute(attrName);\n    } else {\n      el.setAttribute(attrName, attrValue === true ? '' : attrValue);\n    }\n  });\n}\n/**\n * Get an element's attribute values, as defined on the HTML tag.\n *\n * Attributes are not the same as properties. They're defined on the tag\n * or with setAttribute.\n *\n * @param  {Element} tag\n *         Element from which to get tag attributes.\n *\n * @return {Object}\n *         All attributes of the element. Boolean attributes will be `true` or\n *         `false`, others will be strings.\n */\n\n\nfunction getAttributes(tag) {\n  var obj = {}; // known boolean attributes\n  // we can check for matching boolean properties, but not all browsers\n  // and not all tags know about these attributes, so, we still want to check them manually\n\n  var knownBooleans = ',' + 'autoplay,controls,playsinline,loop,muted,default,defaultMuted' + ',';\n\n  if (tag && tag.attributes && tag.attributes.length > 0) {\n    var attrs = tag.attributes;\n\n    for (var i = attrs.length - 1; i >= 0; i--) {\n      var attrName = attrs[i].name;\n      var attrVal = attrs[i].value; // check for known booleans\n      // the matching element property will return a value for typeof\n\n      if (typeof tag[attrName] === 'boolean' || knownBooleans.indexOf(',' + attrName + ',') !== -1) {\n        // the value of an included boolean attribute is typically an empty\n        // string ('') which would equal false if we just check for a false value.\n        // we also don't want support bad code like autoplay='false'\n        attrVal = attrVal !== null ? true : false;\n      }\n\n      obj[attrName] = attrVal;\n    }\n  }\n\n  return obj;\n}\n/**\n * Get the value of an element's attribute.\n *\n * @param {Element} el\n *        A DOM element.\n *\n * @param {string} attribute\n *        Attribute to get the value of.\n *\n * @return {string}\n *         The value of the attribute.\n */\n\n\nfunction getAttribute(el, attribute) {\n  return el.getAttribute(attribute);\n}\n/**\n * Set the value of an element's attribute.\n *\n * @param {Element} el\n *        A DOM element.\n *\n * @param {string} attribute\n *        Attribute to set.\n *\n * @param {string} value\n *        Value to set the attribute to.\n */\n\n\nfunction setAttribute(el, attribute, value) {\n  el.setAttribute(attribute, value);\n}\n/**\n * Remove an element's attribute.\n *\n * @param {Element} el\n *        A DOM element.\n *\n * @param {string} attribute\n *        Attribute to remove.\n */\n\n\nfunction removeAttribute(el, attribute) {\n  el.removeAttribute(attribute);\n}\n/**\n * Attempt to block the ability to select text.\n */\n\n\nfunction blockTextSelection() {\n  document.body.focus();\n\n  document.onselectstart = function () {\n    return false;\n  };\n}\n/**\n * Turn off text selection blocking.\n */\n\n\nfunction unblockTextSelection() {\n  document.onselectstart = function () {\n    return true;\n  };\n}\n/**\n * Identical to the native `getBoundingClientRect` function, but ensures that\n * the method is supported at all (it is in all browsers we claim to support)\n * and that the element is in the DOM before continuing.\n *\n * This wrapper function also shims properties which are not provided by some\n * older browsers (namely, IE8).\n *\n * Additionally, some browsers do not support adding properties to a\n * `ClientRect`/`DOMRect` object; so, we shallow-copy it with the standard\n * properties (except `x` and `y` which are not widely supported). This helps\n * avoid implementations where keys are non-enumerable.\n *\n * @param  {Element} el\n *         Element whose `ClientRect` we want to calculate.\n *\n * @return {Object|undefined}\n *         Always returns a plain object - or `undefined` if it cannot.\n */\n\n\nfunction getBoundingClientRect(el) {\n  if (el && el.getBoundingClientRect && el.parentNode) {\n    var rect = el.getBoundingClientRect();\n    var result = {};\n    ['bottom', 'height', 'left', 'right', 'top', 'width'].forEach(function (k) {\n      if (rect[k] !== undefined) {\n        result[k] = rect[k];\n      }\n    });\n\n    if (!result.height) {\n      result.height = parseFloat(computedStyle(el, 'height'));\n    }\n\n    if (!result.width) {\n      result.width = parseFloat(computedStyle(el, 'width'));\n    }\n\n    return result;\n  }\n}\n/**\n * Represents the position of a DOM element on the page.\n *\n * @typedef  {Object} module:dom~Position\n *\n * @property {number} left\n *           Pixels to the left.\n *\n * @property {number} top\n *           Pixels from the top.\n */\n\n/**\n * Get the position of an element in the DOM.\n *\n * Uses `getBoundingClientRect` technique from John Resig.\n *\n * @see http://ejohn.org/blog/getboundingclientrect-is-awesome/\n *\n * @param  {Element} el\n *         Element from which to get offset.\n *\n * @return {module:dom~Position}\n *         The position of the element that was passed in.\n */\n\n\nfunction findPosition(el) {\n  var box;\n\n  if (el.getBoundingClientRect && el.parentNode) {\n    box = el.getBoundingClientRect();\n  }\n\n  if (!box) {\n    return {\n      left: 0,\n      top: 0\n    };\n  }\n\n  var docEl = document.documentElement;\n  var body = document.body;\n  var clientLeft = docEl.clientLeft || body.clientLeft || 0;\n  var scrollLeft = window$1.pageXOffset || body.scrollLeft;\n  var left = box.left + scrollLeft - clientLeft;\n  var clientTop = docEl.clientTop || body.clientTop || 0;\n  var scrollTop = window$1.pageYOffset || body.scrollTop;\n  var top = box.top + scrollTop - clientTop; // Android sometimes returns slightly off decimal values, so need to round\n\n  return {\n    left: Math.round(left),\n    top: Math.round(top)\n  };\n}\n/**\n * Represents x and y coordinates for a DOM element or mouse pointer.\n *\n * @typedef  {Object} module:dom~Coordinates\n *\n * @property {number} x\n *           x coordinate in pixels\n *\n * @property {number} y\n *           y coordinate in pixels\n */\n\n/**\n * Get the pointer position within an element.\n *\n * The base on the coordinates are the bottom left of the element.\n *\n * @param  {Element} el\n *         Element on which to get the pointer position on.\n *\n * @param  {EventTarget~Event} event\n *         Event object.\n *\n * @return {module:dom~Coordinates}\n *         A coordinates object corresponding to the mouse position.\n *\n */\n\n\nfunction getPointerPosition(el, event) {\n  var position = {};\n  var box = findPosition(el);\n  var boxW = el.offsetWidth;\n  var boxH = el.offsetHeight;\n  var boxY = box.top;\n  var boxX = box.left;\n  var pageY = event.pageY;\n  var pageX = event.pageX;\n\n  if (event.changedTouches) {\n    pageX = event.changedTouches[0].pageX;\n    pageY = event.changedTouches[0].pageY;\n  }\n\n  position.y = Math.max(0, Math.min(1, (boxY - pageY + boxH) / boxH));\n  position.x = Math.max(0, Math.min(1, (pageX - boxX) / boxW));\n  return position;\n}\n/**\n * Determines, via duck typing, whether or not a value is a text node.\n *\n * @param  {Mixed} value\n *         Check if this value is a text node.\n *\n * @return {boolean}\n *         Will be `true` if the value is a text node, `false` otherwise.\n */\n\n\nfunction isTextNode(value) {\n  return isObject(value) && value.nodeType === 3;\n}\n/**\n * Empties the contents of an element.\n *\n * @param  {Element} el\n *         The element to empty children from\n *\n * @return {Element}\n *         The element with no children\n */\n\n\nfunction emptyEl(el) {\n  while (el.firstChild) {\n    el.removeChild(el.firstChild);\n  }\n\n  return el;\n}\n/**\n * This is a mixed value that describes content to be injected into the DOM\n * via some method. It can be of the following types:\n *\n * Type       | Description\n * -----------|-------------\n * `string`   | The value will be normalized into a text node.\n * `Element`  | The value will be accepted as-is.\n * `TextNode` | The value will be accepted as-is.\n * `Array`    | A one-dimensional array of strings, elements, text nodes, or functions. These functions should return a string, element, or text node (any other return value, like an array, will be ignored).\n * `Function` | A function, which is expected to return a string, element, text node, or array - any of the other possible values described above. This means that a content descriptor could be a function that returns an array of functions, but those second-level functions must return strings, elements, or text nodes.\n *\n * @typedef {string|Element|TextNode|Array|Function} module:dom~ContentDescriptor\n */\n\n/**\n * Normalizes content for eventual insertion into the DOM.\n *\n * This allows a wide range of content definition methods, but helps protect\n * from falling into the trap of simply writing to `innerHTML`, which could\n * be an XSS concern.\n *\n * The content for an element can be passed in multiple types and\n * combinations, whose behavior is as follows:\n *\n * @param {module:dom~ContentDescriptor} content\n *        A content descriptor value.\n *\n * @return {Array}\n *         All of the content that was passed in, normalized to an array of\n *         elements or text nodes.\n */\n\n\nfunction normalizeContent(content) {\n  // First, invoke content if it is a function. If it produces an array,\n  // that needs to happen before normalization.\n  if (typeof content === 'function') {\n    content = content();\n  } // Next up, normalize to an array, so one or many items can be normalized,\n  // filtered, and returned.\n\n\n  return (Array.isArray(content) ? content : [content]).map(function (value) {\n    // First, invoke value if it is a function to produce a new value,\n    // which will be subsequently normalized to a Node of some kind.\n    if (typeof value === 'function') {\n      value = value();\n    }\n\n    if (isEl(value) || isTextNode(value)) {\n      return value;\n    }\n\n    if (typeof value === 'string' && /\\S/.test(value)) {\n      return document.createTextNode(value);\n    }\n  }).filter(function (value) {\n    return value;\n  });\n}\n/**\n * Normalizes and appends content to an element.\n *\n * @param  {Element} el\n *         Element to append normalized content to.\n *\n * @param {module:dom~ContentDescriptor} content\n *        A content descriptor value.\n *\n * @return {Element}\n *         The element with appended normalized content.\n */\n\n\nfunction appendContent(el, content) {\n  normalizeContent(content).forEach(function (node) {\n    return el.appendChild(node);\n  });\n  return el;\n}\n/**\n * Normalizes and inserts content into an element; this is identical to\n * `appendContent()`, except it empties the element first.\n *\n * @param {Element} el\n *        Element to insert normalized content into.\n *\n * @param {module:dom~ContentDescriptor} content\n *        A content descriptor value.\n *\n * @return {Element}\n *         The element with inserted normalized content.\n */\n\n\nfunction insertContent(el, content) {\n  return appendContent(emptyEl(el), content);\n}\n/**\n * Check if an event was a single left click.\n *\n * @param  {EventTarget~Event} event\n *         Event object.\n *\n * @return {boolean}\n *         Will be `true` if a single left click, `false` otherwise.\n */\n\n\nfunction isSingleLeftClick(event) {\n  // Note: if you create something draggable, be sure to\n  // call it on both `mousedown` and `mousemove` event,\n  // otherwise `mousedown` should be enough for a button\n  if (event.button === undefined && event.buttons === undefined) {\n    // Why do we need `buttons` ?\n    // Because, middle mouse sometimes have this:\n    // e.button === 0 and e.buttons === 4\n    // Furthermore, we want to prevent combination click, something like\n    // HOLD middlemouse then left click, that would be\n    // e.button === 0, e.buttons === 5\n    // just `button` is not gonna work\n    // Alright, then what this block does ?\n    // this is for chrome `simulate mobile devices`\n    // I want to support this as well\n    return true;\n  }\n\n  if (event.button === 0 && event.buttons === undefined) {\n    // Touch screen, sometimes on some specific device, `buttons`\n    // doesn't have anything (safari on ios, blackberry...)\n    return true;\n  } // `mouseup` event on a single left click has\n  // `button` and `buttons` equal to 0\n\n\n  if (event.type === 'mouseup' && event.button === 0 && event.buttons === 0) {\n    return true;\n  }\n\n  if (event.button !== 0 || event.buttons !== 1) {\n    // This is the reason we have those if else block above\n    // if any special case we can catch and let it slide\n    // we do it above, when get to here, this definitely\n    // is-not-left-click\n    return false;\n  }\n\n  return true;\n}\n/**\n * Finds a single DOM element matching `selector` within the optional\n * `context` of another DOM element (defaulting to `document`).\n *\n * @param  {string} selector\n *         A valid CSS selector, which will be passed to `querySelector`.\n *\n * @param  {Element|String} [context=document]\n *         A DOM element within which to query. Can also be a selector\n *         string in which case the first matching element will be used\n *         as context. If missing (or no element matches selector), falls\n *         back to `document`.\n *\n * @return {Element|null}\n *         The element that was found or null.\n */\n\n\nvar $ = createQuerier('querySelector');\n/**\n * Finds a all DOM elements matching `selector` within the optional\n * `context` of another DOM element (defaulting to `document`).\n *\n * @param  {string} selector\n *         A valid CSS selector, which will be passed to `querySelectorAll`.\n *\n * @param  {Element|String} [context=document]\n *         A DOM element within which to query. Can also be a selector\n *         string in which case the first matching element will be used\n *         as context. If missing (or no element matches selector), falls\n *         back to `document`.\n *\n * @return {NodeList}\n *         A element list of elements that were found. Will be empty if none\n *         were found.\n *\n */\n\nvar $$ = createQuerier('querySelectorAll');\nvar Dom =\n/*#__PURE__*/\nObject.freeze({\n  isReal: isReal,\n  isEl: isEl,\n  isInFrame: isInFrame,\n  createEl: createEl,\n  textContent: textContent,\n  prependTo: prependTo,\n  hasClass: hasClass,\n  addClass: addClass,\n  removeClass: removeClass,\n  toggleClass: toggleClass,\n  setAttributes: setAttributes,\n  getAttributes: getAttributes,\n  getAttribute: getAttribute,\n  setAttribute: setAttribute,\n  removeAttribute: removeAttribute,\n  blockTextSelection: blockTextSelection,\n  unblockTextSelection: unblockTextSelection,\n  getBoundingClientRect: getBoundingClientRect,\n  findPosition: findPosition,\n  getPointerPosition: getPointerPosition,\n  isTextNode: isTextNode,\n  emptyEl: emptyEl,\n  normalizeContent: normalizeContent,\n  appendContent: appendContent,\n  insertContent: insertContent,\n  isSingleLeftClick: isSingleLeftClick,\n  $: $,\n  $$: $$\n});\n/**\n * @file setup.js - Functions for setting up a player without\n * user interaction based on the data-setup `attribute` of the video tag.\n *\n * @module setup\n */\n\nvar _windowLoaded = false;\nvar videojs;\n/**\n * Set up any tags that have a data-setup `attribute` when the player is started.\n */\n\nvar autoSetup = function autoSetup() {\n  // Protect against breakage in non-browser environments and check global autoSetup option.\n  if (!isReal() || videojs.options.autoSetup === false) {\n    return;\n  }\n\n  var vids = Array.prototype.slice.call(document.getElementsByTagName('video'));\n  var audios = Array.prototype.slice.call(document.getElementsByTagName('audio'));\n  var divs = Array.prototype.slice.call(document.getElementsByTagName('video-js'));\n  var mediaEls = vids.concat(audios, divs); // Check if any media elements exist\n\n  if (mediaEls && mediaEls.length > 0) {\n    for (var i = 0, e = mediaEls.length; i < e; i++) {\n      var mediaEl = mediaEls[i]; // Check if element exists, has getAttribute func.\n\n      if (mediaEl && mediaEl.getAttribute) {\n        // Make sure this player hasn't already been set up.\n        if (mediaEl.player === undefined) {\n          var options = mediaEl.getAttribute('data-setup'); // Check if data-setup attr exists.\n          // We only auto-setup if they've added the data-setup attr.\n\n          if (options !== null) {\n            // Create new video.js instance.\n            videojs(mediaEl);\n          }\n        } // If getAttribute isn't defined, we need to wait for the DOM.\n\n      } else {\n        autoSetupTimeout(1);\n        break;\n      }\n    } // No videos were found, so keep looping unless page is finished loading.\n\n  } else if (!_windowLoaded) {\n    autoSetupTimeout(1);\n  }\n};\n/**\n * Wait until the page is loaded before running autoSetup. This will be called in\n * autoSetup if `hasLoaded` returns false.\n *\n * @param {number} wait\n *        How long to wait in ms\n *\n * @param {module:videojs} [vjs]\n *        The videojs library function\n */\n\n\nfunction autoSetupTimeout(wait, vjs) {\n  if (vjs) {\n    videojs = vjs;\n  }\n\n  window$1.setTimeout(autoSetup, wait);\n}\n/**\n * Used to set the internal tracking of window loaded state to true.\n *\n * @private\n */\n\n\nfunction setWindowLoaded() {\n  _windowLoaded = true;\n  window$1.removeEventListener('load', setWindowLoaded);\n}\n\nif (isReal()) {\n  if (document.readyState === 'complete') {\n    setWindowLoaded();\n  } else {\n    /**\n     * Listen for the load event on window, and set _windowLoaded to true.\n     *\n     * We use a standard event listener here to avoid incrementing the GUID\n     * before any players are created.\n     *\n     * @listens load\n     */\n    window$1.addEventListener('load', setWindowLoaded);\n  }\n}\n/**\n * @file stylesheet.js\n * @module stylesheet\n */\n\n/**\n * Create a DOM syle element given a className for it.\n *\n * @param {string} className\n *        The className to add to the created style element.\n *\n * @return {Element}\n *         The element that was created.\n */\n\n\nvar createStyleElement = function createStyleElement(className) {\n  var style = document.createElement('style');\n  style.className = className;\n  return style;\n};\n/**\n * Add text to a DOM element.\n *\n * @param {Element} el\n *        The Element to add text content to.\n *\n * @param {string} content\n *        The text to add to the element.\n */\n\n\nvar setTextContent = function setTextContent(el, content) {\n  if (el.styleSheet) {\n    el.styleSheet.cssText = content;\n  } else {\n    el.textContent = content;\n  }\n};\n/**\n * @file dom-data.js\n * @module dom-data\n */\n\n/**\n * Element Data Store.\n *\n * Allows for binding data to an element without putting it directly on the\n * element. Ex. Event listeners are stored here.\n * (also from jsninja.com, slightly modified and updated for closure compiler)\n *\n * @type {Object}\n * @private\n */\n\n\nvar DomData = new WeakMap();\n/**\n * @file guid.js\n * @module guid\n */\n// Default value for GUIDs. This allows us to reset the GUID counter in tests.\n//\n// The initial GUID is 3 because some users have come to rely on the first\n// default player ID ending up as `vjs_video_3`.\n//\n// See: https://github.com/videojs/video.js/pull/6216\n\nvar _initialGuid = 3;\n/**\n * Unique ID for an element or function\n *\n * @type {Number}\n */\n\nvar _guid = _initialGuid;\n/**\n * Get a unique auto-incrementing ID by number that has not been returned before.\n *\n * @return {number}\n *         A new unique ID.\n */\n\nfunction newGUID() {\n  return _guid++;\n}\n/**\n * @file events.js. An Event System (John Resig - Secrets of a JS Ninja http://jsninja.com/)\n * (Original book version wasn't completely usable, so fixed some things and made Closure Compiler compatible)\n * This should work very similarly to jQuery's events, however it's based off the book version which isn't as\n * robust as jquery's, so there's probably some differences.\n *\n * @file events.js\n * @module events\n */\n\n/**\n * Clean up the listener cache and dispatchers\n *\n * @param {Element|Object} elem\n *        Element to clean up\n *\n * @param {string} type\n *        Type of event to clean up\n */\n\n\nfunction _cleanUpEvents(elem, type) {\n  if (!DomData.has(elem)) {\n    return;\n  }\n\n  var data = DomData.get(elem); // Remove the events of a particular type if there are none left\n\n  if (data.handlers[type].length === 0) {\n    delete data.handlers[type]; // data.handlers[type] = null;\n    // Setting to null was causing an error with data.handlers\n    // Remove the meta-handler from the element\n\n    if (elem.removeEventListener) {\n      elem.removeEventListener(type, data.dispatcher, false);\n    } else if (elem.detachEvent) {\n      elem.detachEvent('on' + type, data.dispatcher);\n    }\n  } // Remove the events object if there are no types left\n\n\n  if (Object.getOwnPropertyNames(data.handlers).length <= 0) {\n    delete data.handlers;\n    delete data.dispatcher;\n    delete data.disabled;\n  } // Finally remove the element data if there is no data left\n\n\n  if (Object.getOwnPropertyNames(data).length === 0) {\n    DomData[\"delete\"](elem);\n  }\n}\n/**\n * Loops through an array of event types and calls the requested method for each type.\n *\n * @param {Function} fn\n *        The event method we want to use.\n *\n * @param {Element|Object} elem\n *        Element or object to bind listeners to\n *\n * @param {string} type\n *        Type of event to bind to.\n *\n * @param {EventTarget~EventListener} callback\n *        Event listener.\n */\n\n\nfunction _handleMultipleEvents(fn, elem, types, callback) {\n  types.forEach(function (type) {\n    // Call the event method for each one of the types\n    fn(elem, type, callback);\n  });\n}\n/**\n * Fix a native event to have standard property values\n *\n * @param {Object} event\n *        Event object to fix.\n *\n * @return {Object}\n *         Fixed event object.\n */\n\n\nfunction fixEvent(event) {\n  function returnTrue() {\n    return true;\n  }\n\n  function returnFalse() {\n    return false;\n  } // Test if fixing up is needed\n  // Used to check if !event.stopPropagation instead of isPropagationStopped\n  // But native events return true for stopPropagation, but don't have\n  // other expected methods like isPropagationStopped. Seems to be a problem\n  // with the Javascript Ninja code. So we're just overriding all events now.\n\n\n  if (!event || !event.isPropagationStopped) {\n    var old = event || window$1.event;\n    event = {}; // Clone the old object so that we can modify the values event = {};\n    // IE8 Doesn't like when you mess with native event properties\n    // Firefox returns false for event.hasOwnProperty('type') and other props\n    //  which makes copying more difficult.\n    // TODO: Probably best to create a whitelist of event props\n\n    for (var key in old) {\n      // Safari 6.0.3 warns you if you try to copy deprecated layerX/Y\n      // Chrome warns you if you try to copy deprecated keyboardEvent.keyLocation\n      // and webkitMovementX/Y\n      if (key !== 'layerX' && key !== 'layerY' && key !== 'keyLocation' && key !== 'webkitMovementX' && key !== 'webkitMovementY') {\n        // Chrome 32+ warns if you try to copy deprecated returnValue, but\n        // we still want to if preventDefault isn't supported (IE8).\n        if (!(key === 'returnValue' && old.preventDefault)) {\n          event[key] = old[key];\n        }\n      }\n    } // The event occurred on this element\n\n\n    if (!event.target) {\n      event.target = event.srcElement || document;\n    } // Handle which other element the event is related to\n\n\n    if (!event.relatedTarget) {\n      event.relatedTarget = event.fromElement === event.target ? event.toElement : event.fromElement;\n    } // Stop the default browser action\n\n\n    event.preventDefault = function () {\n      if (old.preventDefault) {\n        old.preventDefault();\n      }\n\n      event.returnValue = false;\n      old.returnValue = false;\n      event.defaultPrevented = true;\n    };\n\n    event.defaultPrevented = false; // Stop the event from bubbling\n\n    event.stopPropagation = function () {\n      if (old.stopPropagation) {\n        old.stopPropagation();\n      }\n\n      event.cancelBubble = true;\n      old.cancelBubble = true;\n      event.isPropagationStopped = returnTrue;\n    };\n\n    event.isPropagationStopped = returnFalse; // Stop the event from bubbling and executing other handlers\n\n    event.stopImmediatePropagation = function () {\n      if (old.stopImmediatePropagation) {\n        old.stopImmediatePropagation();\n      }\n\n      event.isImmediatePropagationStopped = returnTrue;\n      event.stopPropagation();\n    };\n\n    event.isImmediatePropagationStopped = returnFalse; // Handle mouse position\n\n    if (event.clientX !== null && event.clientX !== undefined) {\n      var doc = document.documentElement;\n      var body = document.body;\n      event.pageX = event.clientX + (doc && doc.scrollLeft || body && body.scrollLeft || 0) - (doc && doc.clientLeft || body && body.clientLeft || 0);\n      event.pageY = event.clientY + (doc && doc.scrollTop || body && body.scrollTop || 0) - (doc && doc.clientTop || body && body.clientTop || 0);\n    } // Handle key presses\n\n\n    event.which = event.charCode || event.keyCode; // Fix button for mouse clicks:\n    // 0 == left; 1 == middle; 2 == right\n\n    if (event.button !== null && event.button !== undefined) {\n      // The following is disabled because it does not pass videojs-standard\n      // and... yikes.\n\n      /* eslint-disable */\n      event.button = event.button & 1 ? 0 : event.button & 4 ? 1 : event.button & 2 ? 2 : 0;\n      /* eslint-enable */\n    }\n  } // Returns fixed-up instance\n\n\n  return event;\n}\n/**\n * Whether passive event listeners are supported\n */\n\n\nvar _supportsPassive = false;\n\n(function () {\n  try {\n    var opts = Object.defineProperty({}, 'passive', {\n      get: function get() {\n        _supportsPassive = true;\n      }\n    });\n    window$1.addEventListener('test', null, opts);\n    window$1.removeEventListener('test', null, opts);\n  } catch (e) {// disregard\n  }\n})();\n/**\n * Touch events Chrome expects to be passive\n */\n\n\nvar passiveEvents = ['touchstart', 'touchmove'];\n/**\n * Add an event listener to element\n * It stores the handler function in a separate cache object\n * and adds a generic handler to the element's event,\n * along with a unique id (guid) to the element.\n *\n * @param {Element|Object} elem\n *        Element or object to bind listeners to\n *\n * @param {string|string[]} type\n *        Type of event to bind to.\n *\n * @param {EventTarget~EventListener} fn\n *        Event listener.\n */\n\nfunction on(elem, type, fn) {\n  if (Array.isArray(type)) {\n    return _handleMultipleEvents(on, elem, type, fn);\n  }\n\n  if (!DomData.has(elem)) {\n    DomData.set(elem, {});\n  }\n\n  var data = DomData.get(elem); // We need a place to store all our handler data\n\n  if (!data.handlers) {\n    data.handlers = {};\n  }\n\n  if (!data.handlers[type]) {\n    data.handlers[type] = [];\n  }\n\n  if (!fn.guid) {\n    fn.guid = newGUID();\n  }\n\n  data.handlers[type].push(fn);\n\n  if (!data.dispatcher) {\n    data.disabled = false;\n\n    data.dispatcher = function (event, hash) {\n      if (data.disabled) {\n        return;\n      }\n\n      event = fixEvent(event);\n      var handlers = data.handlers[event.type];\n\n      if (handlers) {\n        // Copy handlers so if handlers are added/removed during the process it doesn't throw everything off.\n        var handlersCopy = handlers.slice(0);\n\n        for (var m = 0, n = handlersCopy.length; m < n; m++) {\n          if (event.isImmediatePropagationStopped()) {\n            break;\n          } else {\n            try {\n              handlersCopy[m].call(elem, event, hash);\n            } catch (e) {\n              log.error(e);\n            }\n          }\n        }\n      }\n    };\n  }\n\n  if (data.handlers[type].length === 1) {\n    if (elem.addEventListener) {\n      var options = false;\n\n      if (_supportsPassive && passiveEvents.indexOf(type) > -1) {\n        options = {\n          passive: true\n        };\n      }\n\n      elem.addEventListener(type, data.dispatcher, options);\n    } else if (elem.attachEvent) {\n      elem.attachEvent('on' + type, data.dispatcher);\n    }\n  }\n}\n/**\n * Removes event listeners from an element\n *\n * @param {Element|Object} elem\n *        Object to remove listeners from.\n *\n * @param {string|string[]} [type]\n *        Type of listener to remove. Don't include to remove all events from element.\n *\n * @param {EventTarget~EventListener} [fn]\n *        Specific listener to remove. Don't include to remove listeners for an event\n *        type.\n */\n\n\nfunction off(elem, type, fn) {\n  // Don't want to add a cache object through getElData if not needed\n  if (!DomData.has(elem)) {\n    return;\n  }\n\n  var data = DomData.get(elem); // If no events exist, nothing to unbind\n\n  if (!data.handlers) {\n    return;\n  }\n\n  if (Array.isArray(type)) {\n    return _handleMultipleEvents(off, elem, type, fn);\n  } // Utility function\n\n\n  var removeType = function removeType(el, t) {\n    data.handlers[t] = [];\n\n    _cleanUpEvents(el, t);\n  }; // Are we removing all bound events?\n\n\n  if (type === undefined) {\n    for (var t in data.handlers) {\n      if (Object.prototype.hasOwnProperty.call(data.handlers || {}, t)) {\n        removeType(elem, t);\n      }\n    }\n\n    return;\n  }\n\n  var handlers = data.handlers[type]; // If no handlers exist, nothing to unbind\n\n  if (!handlers) {\n    return;\n  } // If no listener was provided, remove all listeners for type\n\n\n  if (!fn) {\n    removeType(elem, type);\n    return;\n  } // We're only removing a single handler\n\n\n  if (fn.guid) {\n    for (var n = 0; n < handlers.length; n++) {\n      if (handlers[n].guid === fn.guid) {\n        handlers.splice(n--, 1);\n      }\n    }\n  }\n\n  _cleanUpEvents(elem, type);\n}\n/**\n * Trigger an event for an element\n *\n * @param {Element|Object} elem\n *        Element to trigger an event on\n *\n * @param {EventTarget~Event|string} event\n *        A string (the type) or an event object with a type attribute\n *\n * @param {Object} [hash]\n *        data hash to pass along with the event\n *\n * @return {boolean|undefined}\n *         Returns the opposite of `defaultPrevented` if default was\n *         prevented. Otherwise, returns `undefined`\n */\n\n\nfunction trigger(elem, event, hash) {\n  // Fetches element data and a reference to the parent (for bubbling).\n  // Don't want to add a data object to cache for every parent,\n  // so checking hasElData first.\n  var elemData = DomData.has(elem) ? DomData.get(elem) : {};\n  var parent = elem.parentNode || elem.ownerDocument; // type = event.type || event,\n  // handler;\n  // If an event name was passed as a string, creates an event out of it\n\n  if (typeof event === 'string') {\n    event = {\n      type: event,\n      target: elem\n    };\n  } else if (!event.target) {\n    event.target = elem;\n  } // Normalizes the event properties.\n\n\n  event = fixEvent(event); // If the passed element has a dispatcher, executes the established handlers.\n\n  if (elemData.dispatcher) {\n    elemData.dispatcher.call(elem, event, hash);\n  } // Unless explicitly stopped or the event does not bubble (e.g. media events)\n  // recursively calls this function to bubble the event up the DOM.\n\n\n  if (parent && !event.isPropagationStopped() && event.bubbles === true) {\n    trigger.call(null, parent, event, hash); // If at the top of the DOM, triggers the default action unless disabled.\n  } else if (!parent && !event.defaultPrevented && event.target && event.target[event.type]) {\n    if (!DomData.has(event.target)) {\n      DomData.set(event.target, {});\n    }\n\n    var targetData = DomData.get(event.target); // Checks if the target has a default action for this event.\n\n    if (event.target[event.type]) {\n      // Temporarily disables event dispatching on the target as we have already executed the handler.\n      targetData.disabled = true; // Executes the default action.\n\n      if (typeof event.target[event.type] === 'function') {\n        event.target[event.type]();\n      } // Re-enables event dispatching.\n\n\n      targetData.disabled = false;\n    }\n  } // Inform the triggerer if the default was prevented by returning false\n\n\n  return !event.defaultPrevented;\n}\n/**\n * Trigger a listener only once for an event.\n *\n * @param {Element|Object} elem\n *        Element or object to bind to.\n *\n * @param {string|string[]} type\n *        Name/type of event\n *\n * @param {Event~EventListener} fn\n *        Event listener function\n */\n\n\nfunction one(elem, type, fn) {\n  if (Array.isArray(type)) {\n    return _handleMultipleEvents(one, elem, type, fn);\n  }\n\n  var func = function func() {\n    off(elem, type, func);\n    fn.apply(this, arguments);\n  }; // copy the guid to the new function so it can removed using the original function's ID\n\n\n  func.guid = fn.guid = fn.guid || newGUID();\n  on(elem, type, func);\n}\n/**\n * Trigger a listener only once and then turn if off for all\n * configured events\n *\n * @param {Element|Object} elem\n *        Element or object to bind to.\n *\n * @param {string|string[]} type\n *        Name/type of event\n *\n * @param {Event~EventListener} fn\n *        Event listener function\n */\n\n\nfunction any(elem, type, fn) {\n  var func = function func() {\n    off(elem, type, func);\n    fn.apply(this, arguments);\n  }; // copy the guid to the new function so it can removed using the original function's ID\n\n\n  func.guid = fn.guid = fn.guid || newGUID(); // multiple ons, but one off for everything\n\n  on(elem, type, func);\n}\n\nvar Events =\n/*#__PURE__*/\nObject.freeze({\n  fixEvent: fixEvent,\n  on: on,\n  off: off,\n  trigger: trigger,\n  one: one,\n  any: any\n});\n/**\n * @file fn.js\n * @module fn\n */\n\nvar UPDATE_REFRESH_INTERVAL = 30;\n/**\n * Bind (a.k.a proxy or context). A simple method for changing the context of\n * a function.\n *\n * It also stores a unique id on the function so it can be easily removed from\n * events.\n *\n * @function\n * @param    {Mixed} context\n *           The object to bind as scope.\n *\n * @param    {Function} fn\n *           The function to be bound to a scope.\n *\n * @param    {number} [uid]\n *           An optional unique ID for the function to be set\n *\n * @return   {Function}\n *           The new function that will be bound into the context given\n */\n\nvar bind = function bind(context, fn, uid) {\n  // Make sure the function has a unique ID\n  if (!fn.guid) {\n    fn.guid = newGUID();\n  } // Create the new function that changes the context\n\n\n  var bound = fn.bind(context); // Allow for the ability to individualize this function\n  // Needed in the case where multiple objects might share the same prototype\n  // IF both items add an event listener with the same function, then you try to remove just one\n  // it will remove both because they both have the same guid.\n  // when using this, you need to use the bind method when you remove the listener as well.\n  // currently used in text tracks\n\n  bound.guid = uid ? uid + '_' + fn.guid : fn.guid;\n  return bound;\n};\n/**\n * Wraps the given function, `fn`, with a new function that only invokes `fn`\n * at most once per every `wait` milliseconds.\n *\n * @function\n * @param    {Function} fn\n *           The function to be throttled.\n *\n * @param    {number}   wait\n *           The number of milliseconds by which to throttle.\n *\n * @return   {Function}\n */\n\n\nvar throttle = function throttle(fn, wait) {\n  var last = window$1.performance.now();\n\n  var throttled = function throttled() {\n    var now = window$1.performance.now();\n\n    if (now - last >= wait) {\n      fn.apply(void 0, arguments);\n      last = now;\n    }\n  };\n\n  return throttled;\n};\n/**\n * Creates a debounced function that delays invoking `func` until after `wait`\n * milliseconds have elapsed since the last time the debounced function was\n * invoked.\n *\n * Inspired by lodash and underscore implementations.\n *\n * @function\n * @param    {Function} func\n *           The function to wrap with debounce behavior.\n *\n * @param    {number} wait\n *           The number of milliseconds to wait after the last invocation.\n *\n * @param    {boolean} [immediate]\n *           Whether or not to invoke the function immediately upon creation.\n *\n * @param    {Object} [context=window]\n *           The \"context\" in which the debounced function should debounce. For\n *           example, if this function should be tied to a Video.js player,\n *           the player can be passed here. Alternatively, defaults to the\n *           global `window` object.\n *\n * @return   {Function}\n *           A debounced function.\n */\n\n\nvar debounce = function debounce(func, wait, immediate, context) {\n  if (context === void 0) {\n    context = window$1;\n  }\n\n  var timeout;\n\n  var cancel = function cancel() {\n    context.clearTimeout(timeout);\n    timeout = null;\n  };\n  /* eslint-disable consistent-this */\n\n\n  var debounced = function debounced() {\n    var self = this;\n    var args = arguments;\n\n    var _later = function later() {\n      timeout = null;\n      _later = null;\n\n      if (!immediate) {\n        func.apply(self, args);\n      }\n    };\n\n    if (!timeout && immediate) {\n      func.apply(self, args);\n    }\n\n    context.clearTimeout(timeout);\n    timeout = context.setTimeout(_later, wait);\n  };\n  /* eslint-enable consistent-this */\n\n\n  debounced.cancel = cancel;\n  return debounced;\n};\n/**\n * @file src/js/event-target.js\n */\n\n/**\n * `EventTarget` is a class that can have the same API as the DOM `EventTarget`. It\n * adds shorthand functions that wrap around lengthy functions. For example:\n * the `on` function is a wrapper around `addEventListener`.\n *\n * @see [EventTarget Spec]{@link https://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-EventTarget}\n * @class EventTarget\n */\n\n\nvar EventTarget = function EventTarget() {};\n/**\n * A Custom DOM event.\n *\n * @typedef {Object} EventTarget~Event\n * @see [Properties]{@link https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent}\n */\n\n/**\n * All event listeners should follow the following format.\n *\n * @callback EventTarget~EventListener\n * @this {EventTarget}\n *\n * @param {EventTarget~Event} event\n *        the event that triggered this function\n *\n * @param {Object} [hash]\n *        hash of data sent during the event\n */\n\n/**\n * An object containing event names as keys and booleans as values.\n *\n * > NOTE: If an event name is set to a true value here {@link EventTarget#trigger}\n *         will have extra functionality. See that function for more information.\n *\n * @property EventTarget.prototype.allowedEvents_\n * @private\n */\n\n\nEventTarget.prototype.allowedEvents_ = {};\n/**\n * Adds an `event listener` to an instance of an `EventTarget`. An `event listener` is a\n * function that will get called when an event with a certain name gets triggered.\n *\n * @param {string|string[]} type\n *        An event name or an array of event names.\n *\n * @param {EventTarget~EventListener} fn\n *        The function to call with `EventTarget`s\n */\n\nEventTarget.prototype.on = function (type, fn) {\n  // Remove the addEventListener alias before calling Events.on\n  // so we don't get into an infinite type loop\n  var ael = this.addEventListener;\n\n  this.addEventListener = function () {};\n\n  on(this, type, fn);\n  this.addEventListener = ael;\n};\n/**\n * An alias of {@link EventTarget#on}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#on}\n */\n\n\nEventTarget.prototype.addEventListener = EventTarget.prototype.on;\n/**\n * Removes an `event listener` for a specific event from an instance of `EventTarget`.\n * This makes it so that the `event listener` will no longer get called when the\n * named event happens.\n *\n * @param {string|string[]} type\n *        An event name or an array of event names.\n *\n * @param {EventTarget~EventListener} fn\n *        The function to remove.\n */\n\nEventTarget.prototype.off = function (type, fn) {\n  off(this, type, fn);\n};\n/**\n * An alias of {@link EventTarget#off}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#off}\n */\n\n\nEventTarget.prototype.removeEventListener = EventTarget.prototype.off;\n/**\n * This function will add an `event listener` that gets triggered only once. After the\n * first trigger it will get removed. This is like adding an `event listener`\n * with {@link EventTarget#on} that calls {@link EventTarget#off} on itself.\n *\n * @param {string|string[]} type\n *        An event name or an array of event names.\n *\n * @param {EventTarget~EventListener} fn\n *        The function to be called once for each event name.\n */\n\nEventTarget.prototype.one = function (type, fn) {\n  // Remove the addEventListener aliasing Events.on\n  // so we don't get into an infinite type loop\n  var ael = this.addEventListener;\n\n  this.addEventListener = function () {};\n\n  one(this, type, fn);\n  this.addEventListener = ael;\n};\n\nEventTarget.prototype.any = function (type, fn) {\n  // Remove the addEventListener aliasing Events.on\n  // so we don't get into an infinite type loop\n  var ael = this.addEventListener;\n\n  this.addEventListener = function () {};\n\n  any(this, type, fn);\n  this.addEventListener = ael;\n};\n/**\n * This function causes an event to happen. This will then cause any `event listeners`\n * that are waiting for that event, to get called. If there are no `event listeners`\n * for an event then nothing will happen.\n *\n * If the name of the `Event` that is being triggered is in `EventTarget.allowedEvents_`.\n * Trigger will also call the `on` + `uppercaseEventName` function.\n *\n * Example:\n * 'click' is in `EventTarget.allowedEvents_`, so, trigger will attempt to call\n * `onClick` if it exists.\n *\n * @param {string|EventTarget~Event|Object} event\n *        The name of the event, an `Event`, or an object with a key of type set to\n *        an event name.\n */\n\n\nEventTarget.prototype.trigger = function (event) {\n  var type = event.type || event; // deprecation\n  // In a future version we should default target to `this`\n  // similar to how we default the target to `elem` in\n  // `Events.trigger`. Right now the default `target` will be\n  // `document` due to the `Event.fixEvent` call.\n\n  if (typeof event === 'string') {\n    event = {\n      type: type\n    };\n  }\n\n  event = fixEvent(event);\n\n  if (this.allowedEvents_[type] && this['on' + type]) {\n    this['on' + type](event);\n  }\n\n  trigger(this, event);\n};\n/**\n * An alias of {@link EventTarget#trigger}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#trigger}\n */\n\n\nEventTarget.prototype.dispatchEvent = EventTarget.prototype.trigger;\nvar EVENT_MAP;\n\nEventTarget.prototype.queueTrigger = function (event) {\n  var _this = this; // only set up EVENT_MAP if it'll be used\n\n\n  if (!EVENT_MAP) {\n    EVENT_MAP = new Map();\n  }\n\n  var type = event.type || event;\n  var map = EVENT_MAP.get(this);\n\n  if (!map) {\n    map = new Map();\n    EVENT_MAP.set(this, map);\n  }\n\n  var oldTimeout = map.get(type);\n  map[\"delete\"](type);\n  window$1.clearTimeout(oldTimeout);\n  var timeout = window$1.setTimeout(function () {\n    // if we cleared out all timeouts for the current target, delete its map\n    if (map.size === 0) {\n      map = null;\n      EVENT_MAP[\"delete\"](_this);\n    }\n\n    _this.trigger(event);\n  }, 0);\n  map.set(type, timeout);\n};\n/**\n * @file mixins/evented.js\n * @module evented\n */\n\n/**\n * Returns whether or not an object has had the evented mixin applied.\n *\n * @param  {Object} object\n *         An object to test.\n *\n * @return {boolean}\n *         Whether or not the object appears to be evented.\n */\n\n\nvar isEvented = function isEvented(object) {\n  return object instanceof EventTarget || !!object.eventBusEl_ && ['on', 'one', 'off', 'trigger'].every(function (k) {\n    return typeof object[k] === 'function';\n  });\n};\n/**\n * Adds a callback to run after the evented mixin applied.\n *\n * @param  {Object} object\n *         An object to Add\n * @param  {Function} callback\n *         The callback to run.\n */\n\n\nvar addEventedCallback = function addEventedCallback(target, callback) {\n  if (isEvented(target)) {\n    callback();\n  } else {\n    if (!target.eventedCallbacks) {\n      target.eventedCallbacks = [];\n    }\n\n    target.eventedCallbacks.push(callback);\n  }\n};\n/**\n * Whether a value is a valid event type - non-empty string or array.\n *\n * @private\n * @param  {string|Array} type\n *         The type value to test.\n *\n * @return {boolean}\n *         Whether or not the type is a valid event type.\n */\n\n\nvar isValidEventType = function isValidEventType(type) {\n  return (// The regex here verifies that the `type` contains at least one non-\n    // whitespace character.\n    typeof type === 'string' && /\\S/.test(type) || Array.isArray(type) && !!type.length\n  );\n};\n/**\n * Validates a value to determine if it is a valid event target. Throws if not.\n *\n * @private\n * @throws {Error}\n *         If the target does not appear to be a valid event target.\n *\n * @param  {Object} target\n *         The object to test.\n */\n\n\nvar validateTarget = function validateTarget(target) {\n  if (!target.nodeName && !isEvented(target)) {\n    throw new Error('Invalid target; must be a DOM node or evented object.');\n  }\n};\n/**\n * Validates a value to determine if it is a valid event target. Throws if not.\n *\n * @private\n * @throws {Error}\n *         If the type does not appear to be a valid event type.\n *\n * @param  {string|Array} type\n *         The type to test.\n */\n\n\nvar validateEventType = function validateEventType(type) {\n  if (!isValidEventType(type)) {\n    throw new Error('Invalid event type; must be a non-empty string or array.');\n  }\n};\n/**\n * Validates a value to determine if it is a valid listener. Throws if not.\n *\n * @private\n * @throws {Error}\n *         If the listener is not a function.\n *\n * @param  {Function} listener\n *         The listener to test.\n */\n\n\nvar validateListener = function validateListener(listener) {\n  if (typeof listener !== 'function') {\n    throw new Error('Invalid listener; must be a function.');\n  }\n};\n/**\n * Takes an array of arguments given to `on()` or `one()`, validates them, and\n * normalizes them into an object.\n *\n * @private\n * @param  {Object} self\n *         The evented object on which `on()` or `one()` was called. This\n *         object will be bound as the `this` value for the listener.\n *\n * @param  {Array} args\n *         An array of arguments passed to `on()` or `one()`.\n *\n * @return {Object}\n *         An object containing useful values for `on()` or `one()` calls.\n */\n\n\nvar normalizeListenArgs = function normalizeListenArgs(self, args) {\n  // If the number of arguments is less than 3, the target is always the\n  // evented object itself.\n  var isTargetingSelf = args.length < 3 || args[0] === self || args[0] === self.eventBusEl_;\n  var target;\n  var type;\n  var listener;\n\n  if (isTargetingSelf) {\n    target = self.eventBusEl_; // Deal with cases where we got 3 arguments, but we are still listening to\n    // the evented object itself.\n\n    if (args.length >= 3) {\n      args.shift();\n    }\n\n    type = args[0];\n    listener = args[1];\n  } else {\n    target = args[0];\n    type = args[1];\n    listener = args[2];\n  }\n\n  validateTarget(target);\n  validateEventType(type);\n  validateListener(listener);\n  listener = bind(self, listener);\n  return {\n    isTargetingSelf: isTargetingSelf,\n    target: target,\n    type: type,\n    listener: listener\n  };\n};\n/**\n * Adds the listener to the event type(s) on the target, normalizing for\n * the type of target.\n *\n * @private\n * @param  {Element|Object} target\n *         A DOM node or evented object.\n *\n * @param  {string} method\n *         The event binding method to use (\"on\" or \"one\").\n *\n * @param  {string|Array} type\n *         One or more event type(s).\n *\n * @param  {Function} listener\n *         A listener function.\n */\n\n\nvar listen = function listen(target, method, type, listener) {\n  validateTarget(target);\n\n  if (target.nodeName) {\n    Events[method](target, type, listener);\n  } else {\n    target[method](type, listener);\n  }\n};\n/**\n * Contains methods that provide event capabilities to an object which is passed\n * to {@link module:evented|evented}.\n *\n * @mixin EventedMixin\n */\n\n\nvar EventedMixin = {\n  /**\n   * Add a listener to an event (or events) on this object or another evented\n   * object.\n   *\n   * @param  {string|Array|Element|Object} targetOrType\n   *         If this is a string or array, it represents the event type(s)\n   *         that will trigger the listener.\n   *\n   *         Another evented object can be passed here instead, which will\n   *         cause the listener to listen for events on _that_ object.\n   *\n   *         In either case, the listener's `this` value will be bound to\n   *         this object.\n   *\n   * @param  {string|Array|Function} typeOrListener\n   *         If the first argument was a string or array, this should be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function.\n   */\n  on: function on() {\n    var _this = this;\n\n    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    var _normalizeListenArgs = normalizeListenArgs(this, args),\n        isTargetingSelf = _normalizeListenArgs.isTargetingSelf,\n        target = _normalizeListenArgs.target,\n        type = _normalizeListenArgs.type,\n        listener = _normalizeListenArgs.listener;\n\n    listen(target, 'on', type, listener); // If this object is listening to another evented object.\n\n    if (!isTargetingSelf) {\n      // If this object is disposed, remove the listener.\n      var removeListenerOnDispose = function removeListenerOnDispose() {\n        return _this.off(target, type, listener);\n      }; // Use the same function ID as the listener so we can remove it later it\n      // using the ID of the original listener.\n\n\n      removeListenerOnDispose.guid = listener.guid; // Add a listener to the target's dispose event as well. This ensures\n      // that if the target is disposed BEFORE this object, we remove the\n      // removal listener that was just added. Otherwise, we create a memory leak.\n\n      var removeRemoverOnTargetDispose = function removeRemoverOnTargetDispose() {\n        return _this.off('dispose', removeListenerOnDispose);\n      }; // Use the same function ID as the listener so we can remove it later\n      // it using the ID of the original listener.\n\n\n      removeRemoverOnTargetDispose.guid = listener.guid;\n      listen(this, 'on', 'dispose', removeListenerOnDispose);\n      listen(target, 'on', 'dispose', removeRemoverOnTargetDispose);\n    }\n  },\n\n  /**\n   * Add a listener to an event (or events) on this object or another evented\n   * object. The listener will be called once per event and then removed.\n   *\n   * @param  {string|Array|Element|Object} targetOrType\n   *         If this is a string or array, it represents the event type(s)\n   *         that will trigger the listener.\n   *\n   *         Another evented object can be passed here instead, which will\n   *         cause the listener to listen for events on _that_ object.\n   *\n   *         In either case, the listener's `this` value will be bound to\n   *         this object.\n   *\n   * @param  {string|Array|Function} typeOrListener\n   *         If the first argument was a string or array, this should be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function.\n   */\n  one: function one() {\n    var _this2 = this;\n\n    for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n      args[_key2] = arguments[_key2];\n    }\n\n    var _normalizeListenArgs2 = normalizeListenArgs(this, args),\n        isTargetingSelf = _normalizeListenArgs2.isTargetingSelf,\n        target = _normalizeListenArgs2.target,\n        type = _normalizeListenArgs2.type,\n        listener = _normalizeListenArgs2.listener; // Targeting this evented object.\n\n\n    if (isTargetingSelf) {\n      listen(target, 'one', type, listener); // Targeting another evented object.\n    } else {\n      // TODO: This wrapper is incorrect! It should only\n      //       remove the wrapper for the event type that called it.\n      //       Instead all listners are removed on the first trigger!\n      //       see https://github.com/videojs/video.js/issues/5962\n      var wrapper = function wrapper() {\n        _this2.off(target, type, wrapper);\n\n        for (var _len3 = arguments.length, largs = new Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {\n          largs[_key3] = arguments[_key3];\n        }\n\n        listener.apply(null, largs);\n      }; // Use the same function ID as the listener so we can remove it later\n      // it using the ID of the original listener.\n\n\n      wrapper.guid = listener.guid;\n      listen(target, 'one', type, wrapper);\n    }\n  },\n\n  /**\n   * Add a listener to an event (or events) on this object or another evented\n   * object. The listener will only be called once for the first event that is triggered\n   * then removed.\n   *\n   * @param  {string|Array|Element|Object} targetOrType\n   *         If this is a string or array, it represents the event type(s)\n   *         that will trigger the listener.\n   *\n   *         Another evented object can be passed here instead, which will\n   *         cause the listener to listen for events on _that_ object.\n   *\n   *         In either case, the listener's `this` value will be bound to\n   *         this object.\n   *\n   * @param  {string|Array|Function} typeOrListener\n   *         If the first argument was a string or array, this should be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function.\n   */\n  any: function any() {\n    var _this3 = this;\n\n    for (var _len4 = arguments.length, args = new Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {\n      args[_key4] = arguments[_key4];\n    }\n\n    var _normalizeListenArgs3 = normalizeListenArgs(this, args),\n        isTargetingSelf = _normalizeListenArgs3.isTargetingSelf,\n        target = _normalizeListenArgs3.target,\n        type = _normalizeListenArgs3.type,\n        listener = _normalizeListenArgs3.listener; // Targeting this evented object.\n\n\n    if (isTargetingSelf) {\n      listen(target, 'any', type, listener); // Targeting another evented object.\n    } else {\n      var wrapper = function wrapper() {\n        _this3.off(target, type, wrapper);\n\n        for (var _len5 = arguments.length, largs = new Array(_len5), _key5 = 0; _key5 < _len5; _key5++) {\n          largs[_key5] = arguments[_key5];\n        }\n\n        listener.apply(null, largs);\n      }; // Use the same function ID as the listener so we can remove it later\n      // it using the ID of the original listener.\n\n\n      wrapper.guid = listener.guid;\n      listen(target, 'any', type, wrapper);\n    }\n  },\n\n  /**\n   * Removes listener(s) from event(s) on an evented object.\n   *\n   * @param  {string|Array|Element|Object} [targetOrType]\n   *         If this is a string or array, it represents the event type(s).\n   *\n   *         Another evented object can be passed here instead, in which case\n   *         ALL 3 arguments are _required_.\n   *\n   * @param  {string|Array|Function} [typeOrListener]\n   *         If the first argument was a string or array, this may be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function; otherwise, _all_ listeners bound to the\n   *         event type(s) will be removed.\n   */\n  off: function off$1(targetOrType, typeOrListener, listener) {\n    // Targeting this evented object.\n    if (!targetOrType || isValidEventType(targetOrType)) {\n      off(this.eventBusEl_, targetOrType, typeOrListener); // Targeting another evented object.\n    } else {\n      var target = targetOrType;\n      var type = typeOrListener; // Fail fast and in a meaningful way!\n\n      validateTarget(target);\n      validateEventType(type);\n      validateListener(listener); // Ensure there's at least a guid, even if the function hasn't been used\n\n      listener = bind(this, listener); // Remove the dispose listener on this evented object, which was given\n      // the same guid as the event listener in on().\n\n      this.off('dispose', listener);\n\n      if (target.nodeName) {\n        off(target, type, listener);\n        off(target, 'dispose', listener);\n      } else if (isEvented(target)) {\n        target.off(type, listener);\n        target.off('dispose', listener);\n      }\n    }\n  },\n\n  /**\n   * Fire an event on this evented object, causing its listeners to be called.\n   *\n   * @param   {string|Object} event\n   *          An event type or an object with a type property.\n   *\n   * @param   {Object} [hash]\n   *          An additional object to pass along to listeners.\n   *\n   * @return {boolean}\n   *          Whether or not the default behavior was prevented.\n   */\n  trigger: function trigger$1(event, hash) {\n    return trigger(this.eventBusEl_, event, hash);\n  }\n};\n/**\n * Applies {@link module:evented~EventedMixin|EventedMixin} to a target object.\n *\n * @param  {Object} target\n *         The object to which to add event methods.\n *\n * @param  {Object} [options={}]\n *         Options for customizing the mixin behavior.\n *\n * @param  {string} [options.eventBusKey]\n *         By default, adds a `eventBusEl_` DOM element to the target object,\n *         which is used as an event bus. If the target object already has a\n *         DOM element that should be used, pass its key here.\n *\n * @return {Object}\n *         The target object.\n */\n\nfunction evented(target, options) {\n  if (options === void 0) {\n    options = {};\n  }\n\n  var _options = options,\n      eventBusKey = _options.eventBusKey; // Set or create the eventBusEl_.\n\n  if (eventBusKey) {\n    if (!target[eventBusKey].nodeName) {\n      throw new Error(\"The eventBusKey \\\"\" + eventBusKey + \"\\\" does not refer to an element.\");\n    }\n\n    target.eventBusEl_ = target[eventBusKey];\n  } else {\n    target.eventBusEl_ = createEl('span', {\n      className: 'vjs-event-bus'\n    });\n  }\n\n  assign(target, EventedMixin);\n\n  if (target.eventedCallbacks) {\n    target.eventedCallbacks.forEach(function (callback) {\n      callback();\n    });\n  } // When any evented object is disposed, it removes all its listeners.\n\n\n  target.on('dispose', function () {\n    target.off();\n    window$1.setTimeout(function () {\n      target.eventBusEl_ = null;\n    }, 0);\n  });\n  return target;\n}\n/**\n * @file mixins/stateful.js\n * @module stateful\n */\n\n/**\n * Contains methods that provide statefulness to an object which is passed\n * to {@link module:stateful}.\n *\n * @mixin StatefulMixin\n */\n\n\nvar StatefulMixin = {\n  /**\n   * A hash containing arbitrary keys and values representing the state of\n   * the object.\n   *\n   * @type {Object}\n   */\n  state: {},\n\n  /**\n   * Set the state of an object by mutating its\n   * {@link module:stateful~StatefulMixin.state|state} object in place.\n   *\n   * @fires   module:stateful~StatefulMixin#statechanged\n   * @param   {Object|Function} stateUpdates\n   *          A new set of properties to shallow-merge into the plugin state.\n   *          Can be a plain object or a function returning a plain object.\n   *\n   * @return {Object|undefined}\n   *          An object containing changes that occurred. If no changes\n   *          occurred, returns `undefined`.\n   */\n  setState: function setState(stateUpdates) {\n    var _this = this; // Support providing the `stateUpdates` state as a function.\n\n\n    if (typeof stateUpdates === 'function') {\n      stateUpdates = stateUpdates();\n    }\n\n    var changes;\n    each(stateUpdates, function (value, key) {\n      // Record the change if the value is different from what's in the\n      // current state.\n      if (_this.state[key] !== value) {\n        changes = changes || {};\n        changes[key] = {\n          from: _this.state[key],\n          to: value\n        };\n      }\n\n      _this.state[key] = value;\n    }); // Only trigger \"statechange\" if there were changes AND we have a trigger\n    // function. This allows us to not require that the target object be an\n    // evented object.\n\n    if (changes && isEvented(this)) {\n      /**\n       * An event triggered on an object that is both\n       * {@link module:stateful|stateful} and {@link module:evented|evented}\n       * indicating that its state has changed.\n       *\n       * @event    module:stateful~StatefulMixin#statechanged\n       * @type     {Object}\n       * @property {Object} changes\n       *           A hash containing the properties that were changed and\n       *           the values they were changed `from` and `to`.\n       */\n      this.trigger({\n        changes: changes,\n        type: 'statechanged'\n      });\n    }\n\n    return changes;\n  }\n};\n/**\n * Applies {@link module:stateful~StatefulMixin|StatefulMixin} to a target\n * object.\n *\n * If the target object is {@link module:evented|evented} and has a\n * `handleStateChanged` method, that method will be automatically bound to the\n * `statechanged` event on itself.\n *\n * @param   {Object} target\n *          The object to be made stateful.\n *\n * @param   {Object} [defaultState]\n *          A default set of properties to populate the newly-stateful object's\n *          `state` property.\n *\n * @return {Object}\n *          Returns the `target`.\n */\n\nfunction stateful(target, defaultState) {\n  assign(target, StatefulMixin); // This happens after the mixing-in because we need to replace the `state`\n  // added in that step.\n\n  target.state = assign({}, target.state, defaultState); // Auto-bind the `handleStateChanged` method of the target object if it exists.\n\n  if (typeof target.handleStateChanged === 'function' && isEvented(target)) {\n    target.on('statechanged', target.handleStateChanged);\n  }\n\n  return target;\n}\n/**\n * @file string-cases.js\n * @module to-lower-case\n */\n\n/**\n * Lowercase the first letter of a string.\n *\n * @param {string} string\n *        String to be lowercased\n *\n * @return {string}\n *         The string with a lowercased first letter\n */\n\n\nvar toLowerCase = function toLowerCase(string) {\n  if (typeof string !== 'string') {\n    return string;\n  }\n\n  return string.replace(/./, function (w) {\n    return w.toLowerCase();\n  });\n};\n/**\n * Uppercase the first letter of a string.\n *\n * @param {string} string\n *        String to be uppercased\n *\n * @return {string}\n *         The string with an uppercased first letter\n */\n\n\nvar toTitleCase = function toTitleCase(string) {\n  if (typeof string !== 'string') {\n    return string;\n  }\n\n  return string.replace(/./, function (w) {\n    return w.toUpperCase();\n  });\n};\n/**\n * Compares the TitleCase versions of the two strings for equality.\n *\n * @param {string} str1\n *        The first string to compare\n *\n * @param {string} str2\n *        The second string to compare\n *\n * @return {boolean}\n *         Whether the TitleCase versions of the strings are equal\n */\n\n\nvar titleCaseEquals = function titleCaseEquals(str1, str2) {\n  return toTitleCase(str1) === toTitleCase(str2);\n};\n/**\n * @file merge-options.js\n * @module merge-options\n */\n\n/**\n * Merge two objects recursively.\n *\n * Performs a deep merge like\n * {@link https://lodash.com/docs/4.17.10#merge|lodash.merge}, but only merges\n * plain objects (not arrays, elements, or anything else).\n *\n * Non-plain object values will be copied directly from the right-most\n * argument.\n *\n * @static\n * @param   {Object[]} sources\n *          One or more objects to merge into a new object.\n *\n * @return {Object}\n *          A new object that is the merged result of all sources.\n */\n\n\nfunction mergeOptions() {\n  var result = {};\n\n  for (var _len = arguments.length, sources = new Array(_len), _key = 0; _key < _len; _key++) {\n    sources[_key] = arguments[_key];\n  }\n\n  sources.forEach(function (source) {\n    if (!source) {\n      return;\n    }\n\n    each(source, function (value, key) {\n      if (!isPlain(value)) {\n        result[key] = value;\n        return;\n      }\n\n      if (!isPlain(result[key])) {\n        result[key] = {};\n      }\n\n      result[key] = mergeOptions(result[key], value);\n    });\n  });\n  return result;\n}\n/**\n * Player Component - Base class for all UI objects\n *\n * @file component.js\n */\n\n/**\n * Base class for all UI Components.\n * Components are UI objects which represent both a javascript object and an element\n * in the DOM. They can be children of other components, and can have\n * children themselves.\n *\n * Components can also use methods from {@link EventTarget}\n */\n\n\nvar Component =\n/*#__PURE__*/\nfunction () {\n  /**\n   * A callback that is called when a component is ready. Does not have any\n   * paramters and any callback value will be ignored.\n   *\n   * @callback Component~ReadyCallback\n   * @this Component\n   */\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Object[]} [options.children]\n   *        An array of children objects to intialize this component with. Children objects have\n   *        a name property that will be used if more than one component of the same type needs to be\n   *        added.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        Function that gets called when the `Component` is ready.\n   */\n  function Component(player, options, ready) {\n    // The component might be the player itself and we can't pass `this` to super\n    if (!player && this.play) {\n      this.player_ = player = this; // eslint-disable-line\n    } else {\n      this.player_ = player;\n    } // Hold the reference to the parent component via `addChild` method\n\n\n    this.parentComponent_ = null; // Make a copy of prototype.options_ to protect against overriding defaults\n\n    this.options_ = mergeOptions({}, this.options_); // Updated options with supplied options\n\n    options = this.options_ = mergeOptions(this.options_, options); // Get ID from options or options element if one is supplied\n\n    this.id_ = options.id || options.el && options.el.id; // If there was no ID from the options, generate one\n\n    if (!this.id_) {\n      // Don't require the player ID function in the case of mock players\n      var id = player && player.id && player.id() || 'no_player';\n      this.id_ = id + \"_component_\" + newGUID();\n    }\n\n    this.name_ = options.name || null; // Create element if one wasn't provided in options\n\n    if (options.el) {\n      this.el_ = options.el;\n    } else if (options.createEl !== false) {\n      this.el_ = this.createEl();\n    } // if evented is anything except false, we want to mixin in evented\n\n\n    if (options.evented !== false) {\n      // Make this an evented object and use `el_`, if available, as its event bus\n      evented(this, {\n        eventBusKey: this.el_ ? 'el_' : null\n      });\n    }\n\n    stateful(this, this.constructor.defaultState);\n    this.children_ = [];\n    this.childIndex_ = {};\n    this.childNameIndex_ = {};\n    this.setTimeoutIds_ = new Set();\n    this.setIntervalIds_ = new Set();\n    this.rafIds_ = new Set();\n    this.clearingTimersOnDispose_ = false; // Add any child components in options\n\n    if (options.initChildren !== false) {\n      this.initChildren();\n    }\n\n    this.ready(ready); // Don't want to trigger ready here or it will before init is actually\n    // finished for all children that run this constructor\n\n    if (options.reportTouchActivity !== false) {\n      this.enableTouchActivity();\n    }\n  }\n  /**\n   * Dispose of the `Component` and all child components.\n   *\n   * @fires Component#dispose\n   */\n\n\n  var _proto = Component.prototype;\n\n  _proto.dispose = function dispose() {\n    /**\n     * Triggered when a `Component` is disposed.\n     *\n     * @event Component#dispose\n     * @type {EventTarget~Event}\n     *\n     * @property {boolean} [bubbles=false]\n     *           set to false so that the close event does not\n     *           bubble up\n     */\n    this.trigger({\n      type: 'dispose',\n      bubbles: false\n    }); // Dispose all children.\n\n    if (this.children_) {\n      for (var i = this.children_.length - 1; i >= 0; i--) {\n        if (this.children_[i].dispose) {\n          this.children_[i].dispose();\n        }\n      }\n    } // Delete child references\n\n\n    this.children_ = null;\n    this.childIndex_ = null;\n    this.childNameIndex_ = null;\n    this.parentComponent_ = null;\n\n    if (this.el_) {\n      // Remove element from DOM\n      if (this.el_.parentNode) {\n        this.el_.parentNode.removeChild(this.el_);\n      }\n\n      if (DomData.has(this.el_)) {\n        DomData[\"delete\"](this.el_);\n      }\n\n      this.el_ = null;\n    } // remove reference to the player after disposing of the element\n\n\n    this.player_ = null;\n  }\n  /**\n   * Return the {@link Player} that the `Component` has attached to.\n   *\n   * @return {Player}\n   *         The player that this `Component` has attached to.\n   */\n  ;\n\n  _proto.player = function player() {\n    return this.player_;\n  }\n  /**\n   * Deep merge of options objects with new options.\n   * > Note: When both `obj` and `options` contain properties whose values are objects.\n   *         The two properties get merged using {@link module:mergeOptions}\n   *\n   * @param {Object} obj\n   *        The object that contains new options.\n   *\n   * @return {Object}\n   *         A new object of `this.options_` and `obj` merged together.\n   */\n  ;\n\n  _proto.options = function options(obj) {\n    if (!obj) {\n      return this.options_;\n    }\n\n    this.options_ = mergeOptions(this.options_, obj);\n    return this.options_;\n  }\n  /**\n   * Get the `Component`s DOM element\n   *\n   * @return {Element}\n   *         The DOM element for this `Component`.\n   */\n  ;\n\n  _proto.el = function el() {\n    return this.el_;\n  }\n  /**\n   * Create the `Component`s DOM element.\n   *\n   * @param {string} [tagName]\n   *        Element's DOM node type. e.g. 'div'\n   *\n   * @param {Object} [properties]\n   *        An object of properties that should be set.\n   *\n   * @param {Object} [attributes]\n   *        An object of attributes that should be set.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl$1(tagName, properties, attributes) {\n    return createEl(tagName, properties, attributes);\n  }\n  /**\n   * Localize a string given the string in english.\n   *\n   * If tokens are provided, it'll try and run a simple token replacement on the provided string.\n   * The tokens it looks for look like `{1}` with the index being 1-indexed into the tokens array.\n   *\n   * If a `defaultValue` is provided, it'll use that over `string`,\n   * if a value isn't found in provided language files.\n   * This is useful if you want to have a descriptive key for token replacement\n   * but have a succinct localized string and not require `en.json` to be included.\n   *\n   * Currently, it is used for the progress bar timing.\n   * ```js\n   * {\n   *   \"progress bar timing: currentTime={1} duration={2}\": \"{1} of {2}\"\n   * }\n   * ```\n   * It is then used like so:\n   * ```js\n   * this.localize('progress bar timing: currentTime={1} duration{2}',\n   *               [this.player_.currentTime(), this.player_.duration()],\n   *               '{1} of {2}');\n   * ```\n   *\n   * Which outputs something like: `01:23 of 24:56`.\n   *\n   *\n   * @param {string} string\n   *        The string to localize and the key to lookup in the language files.\n   * @param {string[]} [tokens]\n   *        If the current item has token replacements, provide the tokens here.\n   * @param {string} [defaultValue]\n   *        Defaults to `string`. Can be a default value to use for token replacement\n   *        if the lookup key is needed to be separate.\n   *\n   * @return {string}\n   *         The localized string or if no localization exists the english string.\n   */\n  ;\n\n  _proto.localize = function localize(string, tokens, defaultValue) {\n    if (defaultValue === void 0) {\n      defaultValue = string;\n    }\n\n    var code = this.player_.language && this.player_.language();\n    var languages = this.player_.languages && this.player_.languages();\n    var language = languages && languages[code];\n    var primaryCode = code && code.split('-')[0];\n    var primaryLang = languages && languages[primaryCode];\n    var localizedString = defaultValue;\n\n    if (language && language[string]) {\n      localizedString = language[string];\n    } else if (primaryLang && primaryLang[string]) {\n      localizedString = primaryLang[string];\n    }\n\n    if (tokens) {\n      localizedString = localizedString.replace(/\\{(\\d+)\\}/g, function (match, index) {\n        var value = tokens[index - 1];\n        var ret = value;\n\n        if (typeof value === 'undefined') {\n          ret = match;\n        }\n\n        return ret;\n      });\n    }\n\n    return localizedString;\n  }\n  /**\n   * Return the `Component`s DOM element. This is where children get inserted.\n   * This will usually be the the same as the element returned in {@link Component#el}.\n   *\n   * @return {Element}\n   *         The content element for this `Component`.\n   */\n  ;\n\n  _proto.contentEl = function contentEl() {\n    return this.contentEl_ || this.el_;\n  }\n  /**\n   * Get this `Component`s ID\n   *\n   * @return {string}\n   *         The id of this `Component`\n   */\n  ;\n\n  _proto.id = function id() {\n    return this.id_;\n  }\n  /**\n   * Get the `Component`s name. The name gets used to reference the `Component`\n   * and is set during registration.\n   *\n   * @return {string}\n   *         The name of this `Component`.\n   */\n  ;\n\n  _proto.name = function name() {\n    return this.name_;\n  }\n  /**\n   * Get an array of all child components\n   *\n   * @return {Array}\n   *         The children\n   */\n  ;\n\n  _proto.children = function children() {\n    return this.children_;\n  }\n  /**\n   * Returns the child `Component` with the given `id`.\n   *\n   * @param {string} id\n   *        The id of the child `Component` to get.\n   *\n   * @return {Component|undefined}\n   *         The child `Component` with the given `id` or undefined.\n   */\n  ;\n\n  _proto.getChildById = function getChildById(id) {\n    return this.childIndex_[id];\n  }\n  /**\n   * Returns the child `Component` with the given `name`.\n   *\n   * @param {string} name\n   *        The name of the child `Component` to get.\n   *\n   * @return {Component|undefined}\n   *         The child `Component` with the given `name` or undefined.\n   */\n  ;\n\n  _proto.getChild = function getChild(name) {\n    if (!name) {\n      return;\n    }\n\n    return this.childNameIndex_[name];\n  }\n  /**\n   * Add a child `Component` inside the current `Component`.\n   *\n   *\n   * @param {string|Component} child\n   *        The name or instance of a child to add.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of options that will get passed to children of\n   *        the child.\n   *\n   * @param {number} [index=this.children_.length]\n   *        The index to attempt to add a child into.\n   *\n   * @return {Component}\n   *         The `Component` that gets added as a child. When using a string the\n   *         `Component` will get created by this process.\n   */\n  ;\n\n  _proto.addChild = function addChild(child, options, index) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (index === void 0) {\n      index = this.children_.length;\n    }\n\n    var component;\n    var componentName; // If child is a string, create component with options\n\n    if (typeof child === 'string') {\n      componentName = toTitleCase(child);\n      var componentClassName = options.componentClass || componentName; // Set name through options\n\n      options.name = componentName; // Create a new object & element for this controls set\n      // If there's no .player_, this is a player\n\n      var ComponentClass = Component.getComponent(componentClassName);\n\n      if (!ComponentClass) {\n        throw new Error(\"Component \" + componentClassName + \" does not exist\");\n      } // data stored directly on the videojs object may be\n      // misidentified as a component to retain\n      // backwards-compatibility with 4.x. check to make sure the\n      // component class can be instantiated.\n\n\n      if (typeof ComponentClass !== 'function') {\n        return null;\n      }\n\n      component = new ComponentClass(this.player_ || this, options); // child is a component instance\n    } else {\n      component = child;\n    }\n\n    if (component.parentComponent_) {\n      component.parentComponent_.removeChild(component);\n    }\n\n    this.children_.splice(index, 0, component);\n    component.parentComponent_ = this;\n\n    if (typeof component.id === 'function') {\n      this.childIndex_[component.id()] = component;\n    } // If a name wasn't used to create the component, check if we can use the\n    // name function of the component\n\n\n    componentName = componentName || component.name && toTitleCase(component.name());\n\n    if (componentName) {\n      this.childNameIndex_[componentName] = component;\n      this.childNameIndex_[toLowerCase(componentName)] = component;\n    } // Add the UI object's element to the container div (box)\n    // Having an element is not required\n\n\n    if (typeof component.el === 'function' && component.el()) {\n      var childNodes = this.contentEl().children;\n      var refNode = childNodes[index] || null;\n      this.contentEl().insertBefore(component.el(), refNode);\n    } // Return so it can stored on parent object if desired.\n\n\n    return component;\n  }\n  /**\n   * Remove a child `Component` from this `Component`s list of children. Also removes\n   * the child `Component`s element from this `Component`s element.\n   *\n   * @param {Component} component\n   *        The child `Component` to remove.\n   */\n  ;\n\n  _proto.removeChild = function removeChild(component) {\n    if (typeof component === 'string') {\n      component = this.getChild(component);\n    }\n\n    if (!component || !this.children_) {\n      return;\n    }\n\n    var childFound = false;\n\n    for (var i = this.children_.length - 1; i >= 0; i--) {\n      if (this.children_[i] === component) {\n        childFound = true;\n        this.children_.splice(i, 1);\n        break;\n      }\n    }\n\n    if (!childFound) {\n      return;\n    }\n\n    component.parentComponent_ = null;\n    this.childIndex_[component.id()] = null;\n    this.childNameIndex_[toTitleCase(component.name())] = null;\n    this.childNameIndex_[toLowerCase(component.name())] = null;\n    var compEl = component.el();\n\n    if (compEl && compEl.parentNode === this.contentEl()) {\n      this.contentEl().removeChild(component.el());\n    }\n  }\n  /**\n   * Add and initialize default child `Component`s based upon options.\n   */\n  ;\n\n  _proto.initChildren = function initChildren() {\n    var _this = this;\n\n    var children = this.options_.children;\n\n    if (children) {\n      // `this` is `parent`\n      var parentOptions = this.options_;\n\n      var handleAdd = function handleAdd(child) {\n        var name = child.name;\n        var opts = child.opts; // Allow options for children to be set at the parent options\n        // e.g. videojs(id, { controlBar: false });\n        // instead of videojs(id, { children: { controlBar: false });\n\n        if (parentOptions[name] !== undefined) {\n          opts = parentOptions[name];\n        } // Allow for disabling default components\n        // e.g. options['children']['posterImage'] = false\n\n\n        if (opts === false) {\n          return;\n        } // Allow options to be passed as a simple boolean if no configuration\n        // is necessary.\n\n\n        if (opts === true) {\n          opts = {};\n        } // We also want to pass the original player options\n        // to each component as well so they don't need to\n        // reach back into the player for options later.\n\n\n        opts.playerOptions = _this.options_.playerOptions; // Create and add the child component.\n        // Add a direct reference to the child by name on the parent instance.\n        // If two of the same component are used, different names should be supplied\n        // for each\n\n        var newChild = _this.addChild(name, opts);\n\n        if (newChild) {\n          _this[name] = newChild;\n        }\n      }; // Allow for an array of children details to passed in the options\n\n\n      var workingChildren;\n      var Tech = Component.getComponent('Tech');\n\n      if (Array.isArray(children)) {\n        workingChildren = children;\n      } else {\n        workingChildren = Object.keys(children);\n      }\n\n      workingChildren // children that are in this.options_ but also in workingChildren  would\n      // give us extra children we do not want. So, we want to filter them out.\n      .concat(Object.keys(this.options_).filter(function (child) {\n        return !workingChildren.some(function (wchild) {\n          if (typeof wchild === 'string') {\n            return child === wchild;\n          }\n\n          return child === wchild.name;\n        });\n      })).map(function (child) {\n        var name;\n        var opts;\n\n        if (typeof child === 'string') {\n          name = child;\n          opts = children[name] || _this.options_[name] || {};\n        } else {\n          name = child.name;\n          opts = child;\n        }\n\n        return {\n          name: name,\n          opts: opts\n        };\n      }).filter(function (child) {\n        // we have to make sure that child.name isn't in the techOrder since\n        // techs are registerd as Components but can't aren't compatible\n        // See https://github.com/videojs/video.js/issues/2772\n        var c = Component.getComponent(child.opts.componentClass || toTitleCase(child.name));\n        return c && !Tech.isTech(c);\n      }).forEach(handleAdd);\n    }\n  }\n  /**\n   * Builds the default DOM class name. Should be overriden by sub-components.\n   *\n   * @return {string}\n   *         The DOM class name for this object.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    // Child classes can include a function that does:\n    // return 'CLASS NAME' + this._super();\n    return '';\n  }\n  /**\n   * Bind a listener to the component's ready state.\n   * Different from event listeners in that if the ready event has already happened\n   * it will trigger the function immediately.\n   *\n   * @return {Component}\n   *         Returns itself; method can be chained.\n   */\n  ;\n\n  _proto.ready = function ready(fn, sync) {\n    if (sync === void 0) {\n      sync = false;\n    }\n\n    if (!fn) {\n      return;\n    }\n\n    if (!this.isReady_) {\n      this.readyQueue_ = this.readyQueue_ || [];\n      this.readyQueue_.push(fn);\n      return;\n    }\n\n    if (sync) {\n      fn.call(this);\n    } else {\n      // Call the function asynchronously by default for consistency\n      this.setTimeout(fn, 1);\n    }\n  }\n  /**\n   * Trigger all the ready listeners for this `Component`.\n   *\n   * @fires Component#ready\n   */\n  ;\n\n  _proto.triggerReady = function triggerReady() {\n    this.isReady_ = true; // Ensure ready is triggered asynchronously\n\n    this.setTimeout(function () {\n      var readyQueue = this.readyQueue_; // Reset Ready Queue\n\n      this.readyQueue_ = [];\n\n      if (readyQueue && readyQueue.length > 0) {\n        readyQueue.forEach(function (fn) {\n          fn.call(this);\n        }, this);\n      } // Allow for using event listeners also\n\n      /**\n       * Triggered when a `Component` is ready.\n       *\n       * @event Component#ready\n       * @type {EventTarget~Event}\n       */\n\n\n      this.trigger('ready');\n    }, 1);\n  }\n  /**\n   * Find a single DOM element matching a `selector`. This can be within the `Component`s\n   * `contentEl()` or another custom context.\n   *\n   * @param {string} selector\n   *        A valid CSS selector, which will be passed to `querySelector`.\n   *\n   * @param {Element|string} [context=this.contentEl()]\n   *        A DOM element within which to query. Can also be a selector string in\n   *        which case the first matching element will get used as context. If\n   *        missing `this.contentEl()` gets used. If  `this.contentEl()` returns\n   *        nothing it falls back to `document`.\n   *\n   * @return {Element|null}\n   *         the dom element that was found, or null\n   *\n   * @see [Information on CSS Selectors](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors)\n   */\n  ;\n\n  _proto.$ = function $$1(selector, context) {\n    return $(selector, context || this.contentEl());\n  }\n  /**\n   * Finds all DOM element matching a `selector`. This can be within the `Component`s\n   * `contentEl()` or another custom context.\n   *\n   * @param {string} selector\n   *        A valid CSS selector, which will be passed to `querySelectorAll`.\n   *\n   * @param {Element|string} [context=this.contentEl()]\n   *        A DOM element within which to query. Can also be a selector string in\n   *        which case the first matching element will get used as context. If\n   *        missing `this.contentEl()` gets used. If  `this.contentEl()` returns\n   *        nothing it falls back to `document`.\n   *\n   * @return {NodeList}\n   *         a list of dom elements that were found\n   *\n   * @see [Information on CSS Selectors](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors)\n   */\n  ;\n\n  _proto.$$ = function $$$1(selector, context) {\n    return $$(selector, context || this.contentEl());\n  }\n  /**\n   * Check if a component's element has a CSS class name.\n   *\n   * @param {string} classToCheck\n   *        CSS class name to check.\n   *\n   * @return {boolean}\n   *         - True if the `Component` has the class.\n   *         - False if the `Component` does not have the class`\n   */\n  ;\n\n  _proto.hasClass = function hasClass$1(classToCheck) {\n    return hasClass(this.el_, classToCheck);\n  }\n  /**\n   * Add a CSS class name to the `Component`s element.\n   *\n   * @param {string} classToAdd\n   *        CSS class name to add\n   */\n  ;\n\n  _proto.addClass = function addClass$1(classToAdd) {\n    addClass(this.el_, classToAdd);\n  }\n  /**\n   * Remove a CSS class name from the `Component`s element.\n   *\n   * @param {string} classToRemove\n   *        CSS class name to remove\n   */\n  ;\n\n  _proto.removeClass = function removeClass$1(classToRemove) {\n    removeClass(this.el_, classToRemove);\n  }\n  /**\n   * Add or remove a CSS class name from the component's element.\n   * - `classToToggle` gets added when {@link Component#hasClass} would return false.\n   * - `classToToggle` gets removed when {@link Component#hasClass} would return true.\n   *\n   * @param  {string} classToToggle\n   *         The class to add or remove based on (@link Component#hasClass}\n   *\n   * @param  {boolean|Dom~predicate} [predicate]\n   *         An {@link Dom~predicate} function or a boolean\n   */\n  ;\n\n  _proto.toggleClass = function toggleClass$1(classToToggle, predicate) {\n    toggleClass(this.el_, classToToggle, predicate);\n  }\n  /**\n   * Show the `Component`s element if it is hidden by removing the\n   * 'vjs-hidden' class name from it.\n   */\n  ;\n\n  _proto.show = function show() {\n    this.removeClass('vjs-hidden');\n  }\n  /**\n   * Hide the `Component`s element if it is currently showing by adding the\n   * 'vjs-hidden` class name to it.\n   */\n  ;\n\n  _proto.hide = function hide() {\n    this.addClass('vjs-hidden');\n  }\n  /**\n   * Lock a `Component`s element in its visible state by adding the 'vjs-lock-showing'\n   * class name to it. Used during fadeIn/fadeOut.\n   *\n   * @private\n   */\n  ;\n\n  _proto.lockShowing = function lockShowing() {\n    this.addClass('vjs-lock-showing');\n  }\n  /**\n   * Unlock a `Component`s element from its visible state by removing the 'vjs-lock-showing'\n   * class name from it. Used during fadeIn/fadeOut.\n   *\n   * @private\n   */\n  ;\n\n  _proto.unlockShowing = function unlockShowing() {\n    this.removeClass('vjs-lock-showing');\n  }\n  /**\n   * Get the value of an attribute on the `Component`s element.\n   *\n   * @param {string} attribute\n   *        Name of the attribute to get the value from.\n   *\n   * @return {string|null}\n   *         - The value of the attribute that was asked for.\n   *         - Can be an empty string on some browsers if the attribute does not exist\n   *           or has no value\n   *         - Most browsers will return null if the attibute does not exist or has\n   *           no value.\n   *\n   * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/getAttribute}\n   */\n  ;\n\n  _proto.getAttribute = function getAttribute$1(attribute) {\n    return getAttribute(this.el_, attribute);\n  }\n  /**\n   * Set the value of an attribute on the `Component`'s element\n   *\n   * @param {string} attribute\n   *        Name of the attribute to set.\n   *\n   * @param {string} value\n   *        Value to set the attribute to.\n   *\n   * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/setAttribute}\n   */\n  ;\n\n  _proto.setAttribute = function setAttribute$1(attribute, value) {\n    setAttribute(this.el_, attribute, value);\n  }\n  /**\n   * Remove an attribute from the `Component`s element.\n   *\n   * @param {string} attribute\n   *        Name of the attribute to remove.\n   *\n   * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/removeAttribute}\n   */\n  ;\n\n  _proto.removeAttribute = function removeAttribute$1(attribute) {\n    removeAttribute(this.el_, attribute);\n  }\n  /**\n   * Get or set the width of the component based upon the CSS styles.\n   * See {@link Component#dimension} for more detailed information.\n   *\n   * @param {number|string} [num]\n   *        The width that you want to set postfixed with '%', 'px' or nothing.\n   *\n   * @param {boolean} [skipListeners]\n   *        Skip the componentresize event trigger\n   *\n   * @return {number|string}\n   *         The width when getting, zero if there is no width. Can be a string\n   *           postpixed with '%' or 'px'.\n   */\n  ;\n\n  _proto.width = function width(num, skipListeners) {\n    return this.dimension('width', num, skipListeners);\n  }\n  /**\n   * Get or set the height of the component based upon the CSS styles.\n   * See {@link Component#dimension} for more detailed information.\n   *\n   * @param {number|string} [num]\n   *        The height that you want to set postfixed with '%', 'px' or nothing.\n   *\n   * @param {boolean} [skipListeners]\n   *        Skip the componentresize event trigger\n   *\n   * @return {number|string}\n   *         The width when getting, zero if there is no width. Can be a string\n   *         postpixed with '%' or 'px'.\n   */\n  ;\n\n  _proto.height = function height(num, skipListeners) {\n    return this.dimension('height', num, skipListeners);\n  }\n  /**\n   * Set both the width and height of the `Component` element at the same time.\n   *\n   * @param  {number|string} width\n   *         Width to set the `Component`s element to.\n   *\n   * @param  {number|string} height\n   *         Height to set the `Component`s element to.\n   */\n  ;\n\n  _proto.dimensions = function dimensions(width, height) {\n    // Skip componentresize listeners on width for optimization\n    this.width(width, true);\n    this.height(height);\n  }\n  /**\n   * Get or set width or height of the `Component` element. This is the shared code\n   * for the {@link Component#width} and {@link Component#height}.\n   *\n   * Things to know:\n   * - If the width or height in an number this will return the number postfixed with 'px'.\n   * - If the width/height is a percent this will return the percent postfixed with '%'\n   * - Hidden elements have a width of 0 with `window.getComputedStyle`. This function\n   *   defaults to the `Component`s `style.width` and falls back to `window.getComputedStyle`.\n   *   See [this]{@link http://www.foliotek.com/devblog/getting-the-width-of-a-hidden-element-with-jquery-using-width/}\n   *   for more information\n   * - If you want the computed style of the component, use {@link Component#currentWidth}\n   *   and {@link {Component#currentHeight}\n   *\n   * @fires Component#componentresize\n   *\n   * @param {string} widthOrHeight\n   8        'width' or 'height'\n   *\n   * @param  {number|string} [num]\n   8         New dimension\n   *\n   * @param  {boolean} [skipListeners]\n   *         Skip componentresize event trigger\n   *\n   * @return {number}\n   *         The dimension when getting or 0 if unset\n   */\n  ;\n\n  _proto.dimension = function dimension(widthOrHeight, num, skipListeners) {\n    if (num !== undefined) {\n      // Set to zero if null or literally NaN (NaN !== NaN)\n      if (num === null || num !== num) {\n        num = 0;\n      } // Check if using css width/height (% or px) and adjust\n\n\n      if (('' + num).indexOf('%') !== -1 || ('' + num).indexOf('px') !== -1) {\n        this.el_.style[widthOrHeight] = num;\n      } else if (num === 'auto') {\n        this.el_.style[widthOrHeight] = '';\n      } else {\n        this.el_.style[widthOrHeight] = num + 'px';\n      } // skipListeners allows us to avoid triggering the resize event when setting both width and height\n\n\n      if (!skipListeners) {\n        /**\n         * Triggered when a component is resized.\n         *\n         * @event Component#componentresize\n         * @type {EventTarget~Event}\n         */\n        this.trigger('componentresize');\n      }\n\n      return;\n    } // Not setting a value, so getting it\n    // Make sure element exists\n\n\n    if (!this.el_) {\n      return 0;\n    } // Get dimension value from style\n\n\n    var val = this.el_.style[widthOrHeight];\n    var pxIndex = val.indexOf('px');\n\n    if (pxIndex !== -1) {\n      // Return the pixel value with no 'px'\n      return parseInt(val.slice(0, pxIndex), 10);\n    } // No px so using % or no style was set, so falling back to offsetWidth/height\n    // If component has display:none, offset will return 0\n    // TODO: handle display:none and no dimension style using px\n\n\n    return parseInt(this.el_['offset' + toTitleCase(widthOrHeight)], 10);\n  }\n  /**\n   * Get the computed width or the height of the component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @param {string} widthOrHeight\n   *        A string containing 'width' or 'height'. Whichever one you want to get.\n   *\n   * @return {number}\n   *         The dimension that gets asked for or 0 if nothing was set\n   *         for that dimension.\n   */\n  ;\n\n  _proto.currentDimension = function currentDimension(widthOrHeight) {\n    var computedWidthOrHeight = 0;\n\n    if (widthOrHeight !== 'width' && widthOrHeight !== 'height') {\n      throw new Error('currentDimension only accepts width or height value');\n    }\n\n    computedWidthOrHeight = computedStyle(this.el_, widthOrHeight); // remove 'px' from variable and parse as integer\n\n    computedWidthOrHeight = parseFloat(computedWidthOrHeight); // if the computed value is still 0, it's possible that the browser is lying\n    // and we want to check the offset values.\n    // This code also runs wherever getComputedStyle doesn't exist.\n\n    if (computedWidthOrHeight === 0 || isNaN(computedWidthOrHeight)) {\n      var rule = \"offset\" + toTitleCase(widthOrHeight);\n      computedWidthOrHeight = this.el_[rule];\n    }\n\n    return computedWidthOrHeight;\n  }\n  /**\n   * An object that contains width and height values of the `Component`s\n   * computed style. Uses `window.getComputedStyle`.\n   *\n   * @typedef {Object} Component~DimensionObject\n   *\n   * @property {number} width\n   *           The width of the `Component`s computed style.\n   *\n   * @property {number} height\n   *           The height of the `Component`s computed style.\n   */\n\n  /**\n   * Get an object that contains computed width and height values of the\n   * component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @return {Component~DimensionObject}\n   *         The computed dimensions of the component's element.\n   */\n  ;\n\n  _proto.currentDimensions = function currentDimensions() {\n    return {\n      width: this.currentDimension('width'),\n      height: this.currentDimension('height')\n    };\n  }\n  /**\n   * Get the computed width of the component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @return {number}\n   *         The computed width of the component's element.\n   */\n  ;\n\n  _proto.currentWidth = function currentWidth() {\n    return this.currentDimension('width');\n  }\n  /**\n   * Get the computed height of the component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @return {number}\n   *         The computed height of the component's element.\n   */\n  ;\n\n  _proto.currentHeight = function currentHeight() {\n    return this.currentDimension('height');\n  }\n  /**\n   * Set the focus to this component\n   */\n  ;\n\n  _proto.focus = function focus() {\n    this.el_.focus();\n  }\n  /**\n   * Remove the focus from this component\n   */\n  ;\n\n  _proto.blur = function blur() {\n    this.el_.blur();\n  }\n  /**\n   * When this Component receives a `keydown` event which it does not process,\n   *  it passes the event to the Player for handling.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    if (this.player_) {\n      // We only stop propagation here because we want unhandled events to fall\n      // back to the browser.\n      event.stopPropagation();\n      this.player_.handleKeyDown(event);\n    }\n  }\n  /**\n   * Many components used to have a `handleKeyPress` method, which was poorly\n   * named because it listened to a `keydown` event. This method name now\n   * delegates to `handleKeyDown`. This means anyone calling `handleKeyPress`\n   * will not see their method calls stop working.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleKeyPress = function handleKeyPress(event) {\n    this.handleKeyDown(event);\n  }\n  /**\n   * Emit a 'tap' events when touch event support gets detected. This gets used to\n   * support toggling the controls through a tap on the video. They get enabled\n   * because every sub-component would have extra overhead otherwise.\n   *\n   * @private\n   * @fires Component#tap\n   * @listens Component#touchstart\n   * @listens Component#touchmove\n   * @listens Component#touchleave\n   * @listens Component#touchcancel\n   * @listens Component#touchend\n    */\n  ;\n\n  _proto.emitTapEvents = function emitTapEvents() {\n    // Track the start time so we can determine how long the touch lasted\n    var touchStart = 0;\n    var firstTouch = null; // Maximum movement allowed during a touch event to still be considered a tap\n    // Other popular libs use anywhere from 2 (hammer.js) to 15,\n    // so 10 seems like a nice, round number.\n\n    var tapMovementThreshold = 10; // The maximum length a touch can be while still being considered a tap\n\n    var touchTimeThreshold = 200;\n    var couldBeTap;\n    this.on('touchstart', function (event) {\n      // If more than one finger, don't consider treating this as a click\n      if (event.touches.length === 1) {\n        // Copy pageX/pageY from the object\n        firstTouch = {\n          pageX: event.touches[0].pageX,\n          pageY: event.touches[0].pageY\n        }; // Record start time so we can detect a tap vs. \"touch and hold\"\n\n        touchStart = window$1.performance.now(); // Reset couldBeTap tracking\n\n        couldBeTap = true;\n      }\n    });\n    this.on('touchmove', function (event) {\n      // If more than one finger, don't consider treating this as a click\n      if (event.touches.length > 1) {\n        couldBeTap = false;\n      } else if (firstTouch) {\n        // Some devices will throw touchmoves for all but the slightest of taps.\n        // So, if we moved only a small distance, this could still be a tap\n        var xdiff = event.touches[0].pageX - firstTouch.pageX;\n        var ydiff = event.touches[0].pageY - firstTouch.pageY;\n        var touchDistance = Math.sqrt(xdiff * xdiff + ydiff * ydiff);\n\n        if (touchDistance > tapMovementThreshold) {\n          couldBeTap = false;\n        }\n      }\n    });\n\n    var noTap = function noTap() {\n      couldBeTap = false;\n    }; // TODO: Listen to the original target. http://youtu.be/DujfpXOKUp8?t=13m8s\n\n\n    this.on('touchleave', noTap);\n    this.on('touchcancel', noTap); // When the touch ends, measure how long it took and trigger the appropriate\n    // event\n\n    this.on('touchend', function (event) {\n      firstTouch = null; // Proceed only if the touchmove/leave/cancel event didn't happen\n\n      if (couldBeTap === true) {\n        // Measure how long the touch lasted\n        var touchTime = window$1.performance.now() - touchStart; // Make sure the touch was less than the threshold to be considered a tap\n\n        if (touchTime < touchTimeThreshold) {\n          // Don't let browser turn this into a click\n          event.preventDefault();\n          /**\n           * Triggered when a `Component` is tapped.\n           *\n           * @event Component#tap\n           * @type {EventTarget~Event}\n           */\n\n          this.trigger('tap'); // It may be good to copy the touchend event object and change the\n          // type to tap, if the other event properties aren't exact after\n          // Events.fixEvent runs (e.g. event.target)\n        }\n      }\n    });\n  }\n  /**\n   * This function reports user activity whenever touch events happen. This can get\n   * turned off by any sub-components that wants touch events to act another way.\n   *\n   * Report user touch activity when touch events occur. User activity gets used to\n   * determine when controls should show/hide. It is simple when it comes to mouse\n   * events, because any mouse event should show the controls. So we capture mouse\n   * events that bubble up to the player and report activity when that happens.\n   * With touch events it isn't as easy as `touchstart` and `touchend` toggle player\n   * controls. So touch events can't help us at the player level either.\n   *\n   * User activity gets checked asynchronously. So what could happen is a tap event\n   * on the video turns the controls off. Then the `touchend` event bubbles up to\n   * the player. Which, if it reported user activity, would turn the controls right\n   * back on. We also don't want to completely block touch events from bubbling up.\n   * Furthermore a `touchmove` event and anything other than a tap, should not turn\n   * controls back on.\n   *\n   * @listens Component#touchstart\n   * @listens Component#touchmove\n   * @listens Component#touchend\n   * @listens Component#touchcancel\n   */\n  ;\n\n  _proto.enableTouchActivity = function enableTouchActivity() {\n    // Don't continue if the root player doesn't support reporting user activity\n    if (!this.player() || !this.player().reportUserActivity) {\n      return;\n    } // listener for reporting that the user is active\n\n\n    var report = bind(this.player(), this.player().reportUserActivity);\n    var touchHolding;\n    this.on('touchstart', function () {\n      report(); // For as long as the they are touching the device or have their mouse down,\n      // we consider them active even if they're not moving their finger or mouse.\n      // So we want to continue to update that they are active\n\n      this.clearInterval(touchHolding); // report at the same interval as activityCheck\n\n      touchHolding = this.setInterval(report, 250);\n    });\n\n    var touchEnd = function touchEnd(event) {\n      report(); // stop the interval that maintains activity if the touch is holding\n\n      this.clearInterval(touchHolding);\n    };\n\n    this.on('touchmove', report);\n    this.on('touchend', touchEnd);\n    this.on('touchcancel', touchEnd);\n  }\n  /**\n   * A callback that has no parameters and is bound into `Component`s context.\n   *\n   * @callback Component~GenericCallback\n   * @this Component\n   */\n\n  /**\n   * Creates a function that runs after an `x` millisecond timeout. This function is a\n   * wrapper around `window.setTimeout`. There are a few reasons to use this one\n   * instead though:\n   * 1. It gets cleared via  {@link Component#clearTimeout} when\n   *    {@link Component#dispose} gets called.\n   * 2. The function callback will gets turned into a {@link Component~GenericCallback}\n   *\n   * > Note: You can't use `window.clearTimeout` on the id returned by this function. This\n   *         will cause its dispose listener not to get cleaned up! Please use\n   *         {@link Component#clearTimeout} or {@link Component#dispose} instead.\n   *\n   * @param {Component~GenericCallback} fn\n   *        The function that will be run after `timeout`.\n   *\n   * @param {number} timeout\n   *        Timeout in milliseconds to delay before executing the specified function.\n   *\n   * @return {number}\n   *         Returns a timeout ID that gets used to identify the timeout. It can also\n   *         get used in {@link Component#clearTimeout} to clear the timeout that\n   *         was set.\n   *\n   * @listens Component#dispose\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setTimeout}\n   */\n  ;\n\n  _proto.setTimeout = function setTimeout(fn, timeout) {\n    var _this2 = this; // declare as variables so they are properly available in timeout function\n    // eslint-disable-next-line\n\n\n    var timeoutId;\n    fn = bind(this, fn);\n    this.clearTimersOnDispose_();\n    timeoutId = window$1.setTimeout(function () {\n      if (_this2.setTimeoutIds_.has(timeoutId)) {\n        _this2.setTimeoutIds_[\"delete\"](timeoutId);\n      }\n\n      fn();\n    }, timeout);\n    this.setTimeoutIds_.add(timeoutId);\n    return timeoutId;\n  }\n  /**\n   * Clears a timeout that gets created via `window.setTimeout` or\n   * {@link Component#setTimeout}. If you set a timeout via {@link Component#setTimeout}\n   * use this function instead of `window.clearTimout`. If you don't your dispose\n   * listener will not get cleaned up until {@link Component#dispose}!\n   *\n   * @param {number} timeoutId\n   *        The id of the timeout to clear. The return value of\n   *        {@link Component#setTimeout} or `window.setTimeout`.\n   *\n   * @return {number}\n   *         Returns the timeout id that was cleared.\n   *\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/clearTimeout}\n   */\n  ;\n\n  _proto.clearTimeout = function clearTimeout(timeoutId) {\n    if (this.setTimeoutIds_.has(timeoutId)) {\n      this.setTimeoutIds_[\"delete\"](timeoutId);\n      window$1.clearTimeout(timeoutId);\n    }\n\n    return timeoutId;\n  }\n  /**\n   * Creates a function that gets run every `x` milliseconds. This function is a wrapper\n   * around `window.setInterval`. There are a few reasons to use this one instead though.\n   * 1. It gets cleared via  {@link Component#clearInterval} when\n   *    {@link Component#dispose} gets called.\n   * 2. The function callback will be a {@link Component~GenericCallback}\n   *\n   * @param {Component~GenericCallback} fn\n   *        The function to run every `x` seconds.\n   *\n   * @param {number} interval\n   *        Execute the specified function every `x` milliseconds.\n   *\n   * @return {number}\n   *         Returns an id that can be used to identify the interval. It can also be be used in\n   *         {@link Component#clearInterval} to clear the interval.\n   *\n   * @listens Component#dispose\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setInterval}\n   */\n  ;\n\n  _proto.setInterval = function setInterval(fn, interval) {\n    fn = bind(this, fn);\n    this.clearTimersOnDispose_();\n    var intervalId = window$1.setInterval(fn, interval);\n    this.setIntervalIds_.add(intervalId);\n    return intervalId;\n  }\n  /**\n   * Clears an interval that gets created via `window.setInterval` or\n   * {@link Component#setInterval}. If you set an inteval via {@link Component#setInterval}\n   * use this function instead of `window.clearInterval`. If you don't your dispose\n   * listener will not get cleaned up until {@link Component#dispose}!\n   *\n   * @param {number} intervalId\n   *        The id of the interval to clear. The return value of\n   *        {@link Component#setInterval} or `window.setInterval`.\n   *\n   * @return {number}\n   *         Returns the interval id that was cleared.\n   *\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/clearInterval}\n   */\n  ;\n\n  _proto.clearInterval = function clearInterval(intervalId) {\n    if (this.setIntervalIds_.has(intervalId)) {\n      this.setIntervalIds_[\"delete\"](intervalId);\n      window$1.clearInterval(intervalId);\n    }\n\n    return intervalId;\n  }\n  /**\n   * Queues up a callback to be passed to requestAnimationFrame (rAF), but\n   * with a few extra bonuses:\n   *\n   * - Supports browsers that do not support rAF by falling back to\n   *   {@link Component#setTimeout}.\n   *\n   * - The callback is turned into a {@link Component~GenericCallback} (i.e.\n   *   bound to the component).\n   *\n   * - Automatic cancellation of the rAF callback is handled if the component\n   *   is disposed before it is called.\n   *\n   * @param  {Component~GenericCallback} fn\n   *         A function that will be bound to this component and executed just\n   *         before the browser's next repaint.\n   *\n   * @return {number}\n   *         Returns an rAF ID that gets used to identify the timeout. It can\n   *         also be used in {@link Component#cancelAnimationFrame} to cancel\n   *         the animation frame callback.\n   *\n   * @listens Component#dispose\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/window/requestAnimationFrame}\n   */\n  ;\n\n  _proto.requestAnimationFrame = function requestAnimationFrame(fn) {\n    var _this3 = this; // Fall back to using a timer.\n\n\n    if (!this.supportsRaf_) {\n      return this.setTimeout(fn, 1000 / 60);\n    }\n\n    this.clearTimersOnDispose_(); // declare as variables so they are properly available in rAF function\n    // eslint-disable-next-line\n\n    var id;\n    fn = bind(this, fn);\n    id = window$1.requestAnimationFrame(function () {\n      if (_this3.rafIds_.has(id)) {\n        _this3.rafIds_[\"delete\"](id);\n      }\n\n      fn();\n    });\n    this.rafIds_.add(id);\n    return id;\n  }\n  /**\n   * Cancels a queued callback passed to {@link Component#requestAnimationFrame}\n   * (rAF).\n   *\n   * If you queue an rAF callback via {@link Component#requestAnimationFrame},\n   * use this function instead of `window.cancelAnimationFrame`. If you don't,\n   * your dispose listener will not get cleaned up until {@link Component#dispose}!\n   *\n   * @param {number} id\n   *        The rAF ID to clear. The return value of {@link Component#requestAnimationFrame}.\n   *\n   * @return {number}\n   *         Returns the rAF ID that was cleared.\n   *\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/window/cancelAnimationFrame}\n   */\n  ;\n\n  _proto.cancelAnimationFrame = function cancelAnimationFrame(id) {\n    // Fall back to using a timer.\n    if (!this.supportsRaf_) {\n      return this.clearTimeout(id);\n    }\n\n    if (this.rafIds_.has(id)) {\n      this.rafIds_[\"delete\"](id);\n      window$1.cancelAnimationFrame(id);\n    }\n\n    return id;\n  }\n  /**\n   * A function to setup `requestAnimationFrame`, `setTimeout`,\n   * and `setInterval`, clearing on dispose.\n   *\n   * > Previously each timer added and removed dispose listeners on it's own.\n   * For better performance it was decided to batch them all, and use `Set`s\n   * to track outstanding timer ids.\n   *\n   * @private\n   */\n  ;\n\n  _proto.clearTimersOnDispose_ = function clearTimersOnDispose_() {\n    var _this4 = this;\n\n    if (this.clearingTimersOnDispose_) {\n      return;\n    }\n\n    this.clearingTimersOnDispose_ = true;\n    this.one('dispose', function () {\n      [['rafIds_', 'cancelAnimationFrame'], ['setTimeoutIds_', 'clearTimeout'], ['setIntervalIds_', 'clearInterval']].forEach(function (_ref) {\n        var idName = _ref[0],\n            cancelName = _ref[1];\n\n        _this4[idName].forEach(_this4[cancelName], _this4);\n      });\n      _this4.clearingTimersOnDispose_ = false;\n    });\n  }\n  /**\n   * Register a `Component` with `videojs` given the name and the component.\n   *\n   * > NOTE: {@link Tech}s should not be registered as a `Component`. {@link Tech}s\n   *         should be registered using {@link Tech.registerTech} or\n   *         {@link videojs:videojs.registerTech}.\n   *\n   * > NOTE: This function can also be seen on videojs as\n   *         {@link videojs:videojs.registerComponent}.\n   *\n   * @param {string} name\n   *        The name of the `Component` to register.\n   *\n   * @param {Component} ComponentToRegister\n   *        The `Component` class to register.\n   *\n   * @return {Component}\n   *         The `Component` that was registered.\n   */\n  ;\n\n  Component.registerComponent = function registerComponent(name, ComponentToRegister) {\n    if (typeof name !== 'string' || !name) {\n      throw new Error(\"Illegal component name, \\\"\" + name + \"\\\"; must be a non-empty string.\");\n    }\n\n    var Tech = Component.getComponent('Tech'); // We need to make sure this check is only done if Tech has been registered.\n\n    var isTech = Tech && Tech.isTech(ComponentToRegister);\n    var isComp = Component === ComponentToRegister || Component.prototype.isPrototypeOf(ComponentToRegister.prototype);\n\n    if (isTech || !isComp) {\n      var reason;\n\n      if (isTech) {\n        reason = 'techs must be registered using Tech.registerTech()';\n      } else {\n        reason = 'must be a Component subclass';\n      }\n\n      throw new Error(\"Illegal component, \\\"\" + name + \"\\\"; \" + reason + \".\");\n    }\n\n    name = toTitleCase(name);\n\n    if (!Component.components_) {\n      Component.components_ = {};\n    }\n\n    var Player = Component.getComponent('Player');\n\n    if (name === 'Player' && Player && Player.players) {\n      var players = Player.players;\n      var playerNames = Object.keys(players); // If we have players that were disposed, then their name will still be\n      // in Players.players. So, we must loop through and verify that the value\n      // for each item is not null. This allows registration of the Player component\n      // after all players have been disposed or before any were created.\n\n      if (players && playerNames.length > 0 && playerNames.map(function (pname) {\n        return players[pname];\n      }).every(Boolean)) {\n        throw new Error('Can not register Player component after player has been created.');\n      }\n    }\n\n    Component.components_[name] = ComponentToRegister;\n    Component.components_[toLowerCase(name)] = ComponentToRegister;\n    return ComponentToRegister;\n  }\n  /**\n   * Get a `Component` based on the name it was registered with.\n   *\n   * @param {string} name\n   *        The Name of the component to get.\n   *\n   * @return {Component}\n   *         The `Component` that got registered under the given name.\n   *\n   * @deprecated In `videojs` 6 this will not return `Component`s that were not\n   *             registered using {@link Component.registerComponent}. Currently we\n   *             check the global `videojs` object for a `Component` name and\n   *             return that if it exists.\n   */\n  ;\n\n  Component.getComponent = function getComponent(name) {\n    if (!name || !Component.components_) {\n      return;\n    }\n\n    return Component.components_[name];\n  };\n\n  return Component;\n}();\n/**\n * Whether or not this component supports `requestAnimationFrame`.\n *\n * This is exposed primarily for testing purposes.\n *\n * @private\n * @type {Boolean}\n */\n\n\nComponent.prototype.supportsRaf_ = typeof window$1.requestAnimationFrame === 'function' && typeof window$1.cancelAnimationFrame === 'function';\nComponent.registerComponent('Component', Component);\n\nfunction _inheritsLoose(subClass, superClass) {\n  subClass.prototype = Object.create(superClass.prototype);\n  subClass.prototype.constructor = subClass;\n  subClass.__proto__ = superClass;\n}\n\nfunction _setPrototypeOf(o, p) {\n  _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {\n    o.__proto__ = p;\n    return o;\n  };\n\n  return _setPrototypeOf(o, p);\n}\n\nfunction isNativeReflectConstruct() {\n  if (typeof Reflect === \"undefined\" || !Reflect.construct) return false;\n  if (Reflect.construct.sham) return false;\n  if (typeof Proxy === \"function\") return true;\n\n  try {\n    Date.prototype.toString.call(Reflect.construct(Date, [], function () {}));\n    return true;\n  } catch (e) {\n    return false;\n  }\n}\n\nfunction _construct(Parent, args, Class) {\n  if (isNativeReflectConstruct()) {\n    _construct = Reflect.construct;\n  } else {\n    _construct = function _construct(Parent, args, Class) {\n      var a = [null];\n      a.push.apply(a, args);\n      var Constructor = Function.bind.apply(Parent, a);\n      var instance = new Constructor();\n      if (Class) _setPrototypeOf(instance, Class.prototype);\n      return instance;\n    };\n  }\n\n  return _construct.apply(null, arguments);\n}\n\nfunction _assertThisInitialized(self) {\n  if (self === void 0) {\n    throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n  }\n\n  return self;\n}\n/**\n * @file browser.js\n * @module browser\n */\n\n\nvar USER_AGENT = window$1.navigator && window$1.navigator.userAgent || '';\nvar webkitVersionMap = /AppleWebKit\\/([\\d.]+)/i.exec(USER_AGENT);\nvar appleWebkitVersion = webkitVersionMap ? parseFloat(webkitVersionMap.pop()) : null;\n/**\n * Whether or not this device is an iPad.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_IPAD = /iPad/i.test(USER_AGENT);\n/**\n * Whether or not this device is an iPhone.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n// The Facebook app's UIWebView identifies as both an iPhone and iPad, so\n// to identify iPhones, we need to exclude iPads.\n// http://artsy.github.io/blog/2012/10/18/the-perils-of-ios-user-agent-sniffing/\n\nvar IS_IPHONE = /iPhone/i.test(USER_AGENT) && !IS_IPAD;\n/**\n * Whether or not this device is an iPod.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_IPOD = /iPod/i.test(USER_AGENT);\n/**\n * Whether or not this is an iOS device.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_IOS = IS_IPHONE || IS_IPAD || IS_IPOD;\n/**\n * The detected iOS version - or `null`.\n *\n * @static\n * @const\n * @type {string|null}\n */\n\nvar IOS_VERSION = function () {\n  var match = USER_AGENT.match(/OS (\\d+)_/i);\n\n  if (match && match[1]) {\n    return match[1];\n  }\n\n  return null;\n}();\n/**\n * Whether or not this is an Android device.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\n\nvar IS_ANDROID = /Android/i.test(USER_AGENT);\n/**\n * The detected Android version - or `null`.\n *\n * @static\n * @const\n * @type {number|string|null}\n */\n\nvar ANDROID_VERSION = function () {\n  // This matches Android Major.Minor.Patch versions\n  // ANDROID_VERSION is Major.Minor as a Number, if Minor isn't available, then only Major is returned\n  var match = USER_AGENT.match(/Android (\\d+)(?:\\.(\\d+))?(?:\\.(\\d+))*/i);\n\n  if (!match) {\n    return null;\n  }\n\n  var major = match[1] && parseFloat(match[1]);\n  var minor = match[2] && parseFloat(match[2]);\n\n  if (major && minor) {\n    return parseFloat(match[1] + '.' + match[2]);\n  } else if (major) {\n    return major;\n  }\n\n  return null;\n}();\n/**\n * Whether or not this is a native Android browser.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\n\nvar IS_NATIVE_ANDROID = IS_ANDROID && ANDROID_VERSION < 5 && appleWebkitVersion < 537;\n/**\n * Whether or not this is Mozilla Firefox.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_FIREFOX = /Firefox/i.test(USER_AGENT);\n/**\n * Whether or not this is Microsoft Edge.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_EDGE = /Edge/i.test(USER_AGENT);\n/**\n * Whether or not this is Google Chrome.\n *\n * This will also be `true` for Chrome on iOS, which will have different support\n * as it is actually Safari under the hood.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_CHROME = !IS_EDGE && (/Chrome/i.test(USER_AGENT) || /CriOS/i.test(USER_AGENT));\n/**\n * The detected Google Chrome version - or `null`.\n *\n * @static\n * @const\n * @type {number|null}\n */\n\nvar CHROME_VERSION = function () {\n  var match = USER_AGENT.match(/(Chrome|CriOS)\\/(\\d+)/);\n\n  if (match && match[2]) {\n    return parseFloat(match[2]);\n  }\n\n  return null;\n}();\n/**\n * The detected Internet Explorer version - or `null`.\n *\n * @static\n * @const\n * @type {number|null}\n */\n\n\nvar IE_VERSION = function () {\n  var result = /MSIE\\s(\\d+)\\.\\d/.exec(USER_AGENT);\n  var version = result && parseFloat(result[1]);\n\n  if (!version && /Trident\\/7.0/i.test(USER_AGENT) && /rv:11.0/.test(USER_AGENT)) {\n    // IE 11 has a different user agent string than other IE versions\n    version = 11.0;\n  }\n\n  return version;\n}();\n/**\n * Whether or not this is desktop Safari.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\n\nvar IS_SAFARI = /Safari/i.test(USER_AGENT) && !IS_CHROME && !IS_ANDROID && !IS_EDGE;\n/**\n * Whether or not this is any flavor of Safari - including iOS.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_ANY_SAFARI = (IS_SAFARI || IS_IOS) && !IS_CHROME;\n/**\n * Whether or not this is a Windows machine.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_WINDOWS = /Windows/i.test(USER_AGENT);\n/**\n * Whether or not this device is touch-enabled.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar TOUCH_ENABLED = isReal() && ('ontouchstart' in window$1 || window$1.navigator.maxTouchPoints || window$1.DocumentTouch && window$1.document instanceof window$1.DocumentTouch);\nvar browser =\n/*#__PURE__*/\nObject.freeze({\n  IS_IPAD: IS_IPAD,\n  IS_IPHONE: IS_IPHONE,\n  IS_IPOD: IS_IPOD,\n  IS_IOS: IS_IOS,\n  IOS_VERSION: IOS_VERSION,\n  IS_ANDROID: IS_ANDROID,\n  ANDROID_VERSION: ANDROID_VERSION,\n  IS_NATIVE_ANDROID: IS_NATIVE_ANDROID,\n  IS_FIREFOX: IS_FIREFOX,\n  IS_EDGE: IS_EDGE,\n  IS_CHROME: IS_CHROME,\n  CHROME_VERSION: CHROME_VERSION,\n  IE_VERSION: IE_VERSION,\n  IS_SAFARI: IS_SAFARI,\n  IS_ANY_SAFARI: IS_ANY_SAFARI,\n  IS_WINDOWS: IS_WINDOWS,\n  TOUCH_ENABLED: TOUCH_ENABLED\n});\n/**\n * @file time-ranges.js\n * @module time-ranges\n */\n\n/**\n * Returns the time for the specified index at the start or end\n * of a TimeRange object.\n *\n * @typedef    {Function} TimeRangeIndex\n *\n * @param      {number} [index=0]\n *             The range number to return the time for.\n *\n * @return     {number}\n *             The time offset at the specified index.\n *\n * @deprecated The index argument must be provided.\n *             In the future, leaving it out will throw an error.\n */\n\n/**\n * An object that contains ranges of time.\n *\n * @typedef  {Object} TimeRange\n *\n * @property {number} length\n *           The number of time ranges represented by this object.\n *\n * @property {module:time-ranges~TimeRangeIndex} start\n *           Returns the time offset at which a specified time range begins.\n *\n * @property {module:time-ranges~TimeRangeIndex} end\n *           Returns the time offset at which a specified time range ends.\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/TimeRanges\n */\n\n/**\n * Check if any of the time ranges are over the maximum index.\n *\n * @private\n * @param   {string} fnName\n *          The function name to use for logging\n *\n * @param   {number} index\n *          The index to check\n *\n * @param   {number} maxIndex\n *          The maximum possible index\n *\n * @throws  {Error} if the timeRanges provided are over the maxIndex\n */\n\nfunction rangeCheck(fnName, index, maxIndex) {\n  if (typeof index !== 'number' || index < 0 || index > maxIndex) {\n    throw new Error(\"Failed to execute '\" + fnName + \"' on 'TimeRanges': The index provided (\" + index + \") is non-numeric or out of bounds (0-\" + maxIndex + \").\");\n  }\n}\n/**\n * Get the time for the specified index at the start or end\n * of a TimeRange object.\n *\n * @private\n * @param      {string} fnName\n *             The function name to use for logging\n *\n * @param      {string} valueIndex\n *             The property that should be used to get the time. should be\n *             'start' or 'end'\n *\n * @param      {Array} ranges\n *             An array of time ranges\n *\n * @param      {Array} [rangeIndex=0]\n *             The index to start the search at\n *\n * @return     {number}\n *             The time that offset at the specified index.\n *\n * @deprecated rangeIndex must be set to a value, in the future this will throw an error.\n * @throws     {Error} if rangeIndex is more than the length of ranges\n */\n\n\nfunction getRange(fnName, valueIndex, ranges, rangeIndex) {\n  rangeCheck(fnName, rangeIndex, ranges.length - 1);\n  return ranges[rangeIndex][valueIndex];\n}\n/**\n * Create a time range object given ranges of time.\n *\n * @private\n * @param   {Array} [ranges]\n *          An array of time ranges.\n */\n\n\nfunction createTimeRangesObj(ranges) {\n  if (ranges === undefined || ranges.length === 0) {\n    return {\n      length: 0,\n      start: function start() {\n        throw new Error('This TimeRanges object is empty');\n      },\n      end: function end() {\n        throw new Error('This TimeRanges object is empty');\n      }\n    };\n  }\n\n  return {\n    length: ranges.length,\n    start: getRange.bind(null, 'start', 0, ranges),\n    end: getRange.bind(null, 'end', 1, ranges)\n  };\n}\n/**\n * Create a `TimeRange` object which mimics an\n * {@link https://developer.mozilla.org/en-US/docs/Web/API/TimeRanges|HTML5 TimeRanges instance}.\n *\n * @param {number|Array[]} start\n *        The start of a single range (a number) or an array of ranges (an\n *        array of arrays of two numbers each).\n *\n * @param {number} end\n *        The end of a single range. Cannot be used with the array form of\n *        the `start` argument.\n */\n\n\nfunction createTimeRanges(start, end) {\n  if (Array.isArray(start)) {\n    return createTimeRangesObj(start);\n  } else if (start === undefined || end === undefined) {\n    return createTimeRangesObj();\n  }\n\n  return createTimeRangesObj([[start, end]]);\n}\n/**\n * @file buffer.js\n * @module buffer\n */\n\n/**\n * Compute the percentage of the media that has been buffered.\n *\n * @param {TimeRange} buffered\n *        The current `TimeRange` object representing buffered time ranges\n *\n * @param {number} duration\n *        Total duration of the media\n *\n * @return {number}\n *         Percent buffered of the total duration in decimal form.\n */\n\n\nfunction bufferedPercent(buffered, duration) {\n  var bufferedDuration = 0;\n  var start;\n  var end;\n\n  if (!duration) {\n    return 0;\n  }\n\n  if (!buffered || !buffered.length) {\n    buffered = createTimeRanges(0, 0);\n  }\n\n  for (var i = 0; i < buffered.length; i++) {\n    start = buffered.start(i);\n    end = buffered.end(i); // buffered end can be bigger than duration by a very small fraction\n\n    if (end > duration) {\n      end = duration;\n    }\n\n    bufferedDuration += end - start;\n  }\n\n  return bufferedDuration / duration;\n}\n/**\n * @file fullscreen-api.js\n * @module fullscreen-api\n * @private\n */\n\n/**\n * Store the browser-specific methods for the fullscreen API.\n *\n * @type {Object}\n * @see [Specification]{@link https://fullscreen.spec.whatwg.org}\n * @see [Map Approach From Screenfull.js]{@link https://github.com/sindresorhus/screenfull.js}\n */\n\n\nvar FullscreenApi = {\n  prefixed: true\n}; // browser API methods\n\nvar apiMap = [['requestFullscreen', 'exitFullscreen', 'fullscreenElement', 'fullscreenEnabled', 'fullscreenchange', 'fullscreenerror', 'fullscreen'], // WebKit\n['webkitRequestFullscreen', 'webkitExitFullscreen', 'webkitFullscreenElement', 'webkitFullscreenEnabled', 'webkitfullscreenchange', 'webkitfullscreenerror', '-webkit-full-screen'], // Mozilla\n['mozRequestFullScreen', 'mozCancelFullScreen', 'mozFullScreenElement', 'mozFullScreenEnabled', 'mozfullscreenchange', 'mozfullscreenerror', '-moz-full-screen'], // Microsoft\n['msRequestFullscreen', 'msExitFullscreen', 'msFullscreenElement', 'msFullscreenEnabled', 'MSFullscreenChange', 'MSFullscreenError', '-ms-fullscreen']];\nvar specApi = apiMap[0];\nvar browserApi; // determine the supported set of functions\n\nfor (var i = 0; i < apiMap.length; i++) {\n  // check for exitFullscreen function\n  if (apiMap[i][1] in document) {\n    browserApi = apiMap[i];\n    break;\n  }\n} // map the browser API names to the spec API names\n\n\nif (browserApi) {\n  for (var _i = 0; _i < browserApi.length; _i++) {\n    FullscreenApi[specApi[_i]] = browserApi[_i];\n  }\n\n  FullscreenApi.prefixed = browserApi[0] !== specApi[0];\n}\n/**\n * @file media-error.js\n */\n\n/**\n * A Custom `MediaError` class which mimics the standard HTML5 `MediaError` class.\n *\n * @param {number|string|Object|MediaError} value\n *        This can be of multiple types:\n *        - number: should be a standard error code\n *        - string: an error message (the code will be 0)\n *        - Object: arbitrary properties\n *        - `MediaError` (native): used to populate a video.js `MediaError` object\n *        - `MediaError` (video.js): will return itself if it's already a\n *          video.js `MediaError` object.\n *\n * @see [MediaError Spec]{@link https://dev.w3.org/html5/spec-author-view/video.html#mediaerror}\n * @see [Encrypted MediaError Spec]{@link https://www.w3.org/TR/2013/WD-encrypted-media-20130510/#error-codes}\n *\n * @class MediaError\n */\n\n\nfunction MediaError(value) {\n  // Allow redundant calls to this constructor to avoid having `instanceof`\n  // checks peppered around the code.\n  if (value instanceof MediaError) {\n    return value;\n  }\n\n  if (typeof value === 'number') {\n    this.code = value;\n  } else if (typeof value === 'string') {\n    // default code is zero, so this is a custom error\n    this.message = value;\n  } else if (isObject(value)) {\n    // We assign the `code` property manually because native `MediaError` objects\n    // do not expose it as an own/enumerable property of the object.\n    if (typeof value.code === 'number') {\n      this.code = value.code;\n    }\n\n    assign(this, value);\n  }\n\n  if (!this.message) {\n    this.message = MediaError.defaultMessages[this.code] || '';\n  }\n}\n/**\n * The error code that refers two one of the defined `MediaError` types\n *\n * @type {Number}\n */\n\n\nMediaError.prototype.code = 0;\n/**\n * An optional message that to show with the error. Message is not part of the HTML5\n * video spec but allows for more informative custom errors.\n *\n * @type {String}\n */\n\nMediaError.prototype.message = '';\n/**\n * An optional status code that can be set by plugins to allow even more detail about\n * the error. For example a plugin might provide a specific HTTP status code and an\n * error message for that code. Then when the plugin gets that error this class will\n * know how to display an error message for it. This allows a custom message to show\n * up on the `Player` error overlay.\n *\n * @type {Array}\n */\n\nMediaError.prototype.status = null;\n/**\n * Errors indexed by the W3C standard. The order **CANNOT CHANGE**! See the\n * specification listed under {@link MediaError} for more information.\n *\n * @enum {array}\n * @readonly\n * @property {string} 0 - MEDIA_ERR_CUSTOM\n * @property {string} 1 - MEDIA_ERR_ABORTED\n * @property {string} 2 - MEDIA_ERR_NETWORK\n * @property {string} 3 - MEDIA_ERR_DECODE\n * @property {string} 4 - MEDIA_ERR_SRC_NOT_SUPPORTED\n * @property {string} 5 - MEDIA_ERR_ENCRYPTED\n */\n\nMediaError.errorTypes = ['MEDIA_ERR_CUSTOM', 'MEDIA_ERR_ABORTED', 'MEDIA_ERR_NETWORK', 'MEDIA_ERR_DECODE', 'MEDIA_ERR_SRC_NOT_SUPPORTED', 'MEDIA_ERR_ENCRYPTED'];\n/**\n * The default `MediaError` messages based on the {@link MediaError.errorTypes}.\n *\n * @type {Array}\n * @constant\n */\n\nMediaError.defaultMessages = {\n  1: 'You aborted the media playback',\n  2: 'A network error caused the media download to fail part-way.',\n  3: 'The media playback was aborted due to a corruption problem or because the media used features your browser did not support.',\n  4: 'The media could not be loaded, either because the server or network failed or because the format is not supported.',\n  5: 'The media is encrypted and we do not have the keys to decrypt it.'\n}; // Add types as properties on MediaError\n// e.g. MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED = 4;\n\nfor (var errNum = 0; errNum < MediaError.errorTypes.length; errNum++) {\n  MediaError[MediaError.errorTypes[errNum]] = errNum; // values should be accessible on both the class and instance\n\n  MediaError.prototype[MediaError.errorTypes[errNum]] = errNum;\n} // jsdocs for instance/static members added above\n\n/**\n * Returns whether an object is `Promise`-like (i.e. has a `then` method).\n *\n * @param  {Object}  value\n *         An object that may or may not be `Promise`-like.\n *\n * @return {boolean}\n *         Whether or not the object is `Promise`-like.\n */\n\n\nfunction isPromise(value) {\n  return value !== undefined && value !== null && typeof value.then === 'function';\n}\n/**\n * Silence a Promise-like object.\n *\n * This is useful for avoiding non-harmful, but potentially confusing \"uncaught\n * play promise\" rejection error messages.\n *\n * @param  {Object} value\n *         An object that may or may not be `Promise`-like.\n */\n\n\nfunction silencePromise(value) {\n  if (isPromise(value)) {\n    value.then(null, function (e) {});\n  }\n}\n/**\n * @file text-track-list-converter.js Utilities for capturing text track state and\n * re-creating tracks based on a capture.\n *\n * @module text-track-list-converter\n */\n\n/**\n * Examine a single {@link TextTrack} and return a JSON-compatible javascript object that\n * represents the {@link TextTrack}'s state.\n *\n * @param {TextTrack} track\n *        The text track to query.\n *\n * @return {Object}\n *         A serializable javascript representation of the TextTrack.\n * @private\n */\n\n\nvar trackToJson_ = function trackToJson_(track) {\n  var ret = ['kind', 'label', 'language', 'id', 'inBandMetadataTrackDispatchType', 'mode', 'src'].reduce(function (acc, prop, i) {\n    if (track[prop]) {\n      acc[prop] = track[prop];\n    }\n\n    return acc;\n  }, {\n    cues: track.cues && Array.prototype.map.call(track.cues, function (cue) {\n      return {\n        startTime: cue.startTime,\n        endTime: cue.endTime,\n        text: cue.text,\n        id: cue.id\n      };\n    })\n  });\n  return ret;\n};\n/**\n * Examine a {@link Tech} and return a JSON-compatible javascript array that represents the\n * state of all {@link TextTrack}s currently configured. The return array is compatible with\n * {@link text-track-list-converter:jsonToTextTracks}.\n *\n * @param {Tech} tech\n *        The tech object to query\n *\n * @return {Array}\n *         A serializable javascript representation of the {@link Tech}s\n *         {@link TextTrackList}.\n */\n\n\nvar textTracksToJson = function textTracksToJson(tech) {\n  var trackEls = tech.$$('track');\n  var trackObjs = Array.prototype.map.call(trackEls, function (t) {\n    return t.track;\n  });\n  var tracks = Array.prototype.map.call(trackEls, function (trackEl) {\n    var json = trackToJson_(trackEl.track);\n\n    if (trackEl.src) {\n      json.src = trackEl.src;\n    }\n\n    return json;\n  });\n  return tracks.concat(Array.prototype.filter.call(tech.textTracks(), function (track) {\n    return trackObjs.indexOf(track) === -1;\n  }).map(trackToJson_));\n};\n/**\n * Create a set of remote {@link TextTrack}s on a {@link Tech} based on an array of javascript\n * object {@link TextTrack} representations.\n *\n * @param {Array} json\n *        An array of `TextTrack` representation objects, like those that would be\n *        produced by `textTracksToJson`.\n *\n * @param {Tech} tech\n *        The `Tech` to create the `TextTrack`s on.\n */\n\n\nvar jsonToTextTracks = function jsonToTextTracks(json, tech) {\n  json.forEach(function (track) {\n    var addedTrack = tech.addRemoteTextTrack(track).track;\n\n    if (!track.src && track.cues) {\n      track.cues.forEach(function (cue) {\n        return addedTrack.addCue(cue);\n      });\n    }\n  });\n  return tech.textTracks();\n};\n\nvar textTrackConverter = {\n  textTracksToJson: textTracksToJson,\n  jsonToTextTracks: jsonToTextTracks,\n  trackToJson_: trackToJson_\n};\nvar MODAL_CLASS_NAME = 'vjs-modal-dialog';\n/**\n * The `ModalDialog` displays over the video and its controls, which blocks\n * interaction with the player until it is closed.\n *\n * Modal dialogs include a \"Close\" button and will close when that button\n * is activated - or when ESC is pressed anywhere.\n *\n * @extends Component\n */\n\nvar ModalDialog =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(ModalDialog, _Component);\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Mixed} [options.content=undefined]\n   *        Provide customized content for this modal.\n   *\n   * @param {string} [options.description]\n   *        A text description for the modal, primarily for accessibility.\n   *\n   * @param {boolean} [options.fillAlways=false]\n   *        Normally, modals are automatically filled only the first time\n   *        they open. This tells the modal to refresh its content\n   *        every time it opens.\n   *\n   * @param {string} [options.label]\n   *        A text label for the modal, primarily for accessibility.\n   *\n   * @param {boolean} [options.pauseOnOpen=true]\n   *        If `true`, playback will will be paused if playing when\n   *        the modal opens, and resumed when it closes.\n   *\n   * @param {boolean} [options.temporary=true]\n   *        If `true`, the modal can only be opened once; it will be\n   *        disposed as soon as it's closed.\n   *\n   * @param {boolean} [options.uncloseable=false]\n   *        If `true`, the user will not be able to close the modal\n   *        through the UI in the normal ways. Programmatic closing is\n   *        still possible.\n   */\n\n\n  function ModalDialog(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.opened_ = _this.hasBeenOpened_ = _this.hasBeenFilled_ = false;\n\n    _this.closeable(!_this.options_.uncloseable);\n\n    _this.content(_this.options_.content); // Make sure the contentEl is defined AFTER any children are initialized\n    // because we only want the contents of the modal in the contentEl\n    // (not the UI elements like the close button).\n\n\n    _this.contentEl_ = createEl('div', {\n      className: MODAL_CLASS_NAME + \"-content\"\n    }, {\n      role: 'document'\n    });\n    _this.descEl_ = createEl('p', {\n      className: MODAL_CLASS_NAME + \"-description vjs-control-text\",\n      id: _this.el().getAttribute('aria-describedby')\n    });\n    textContent(_this.descEl_, _this.description());\n\n    _this.el_.appendChild(_this.descEl_);\n\n    _this.el_.appendChild(_this.contentEl_);\n\n    return _this;\n  }\n  /**\n   * Create the `ModalDialog`'s DOM element\n   *\n   * @return {Element}\n   *         The DOM element that gets created.\n   */\n\n\n  var _proto = ModalDialog.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: this.buildCSSClass(),\n      tabIndex: -1\n    }, {\n      'aria-describedby': this.id() + \"_description\",\n      'aria-hidden': 'true',\n      'aria-label': this.label(),\n      'role': 'dialog'\n    });\n  };\n\n  _proto.dispose = function dispose() {\n    this.contentEl_ = null;\n    this.descEl_ = null;\n    this.previouslyActiveEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return MODAL_CLASS_NAME + \" vjs-hidden \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Returns the label string for this modal. Primarily used for accessibility.\n   *\n   * @return {string}\n   *         the localized or raw label of this modal.\n   */\n  ;\n\n  _proto.label = function label() {\n    return this.localize(this.options_.label || 'Modal Window');\n  }\n  /**\n   * Returns the description string for this modal. Primarily used for\n   * accessibility.\n   *\n   * @return {string}\n   *         The localized or raw description of this modal.\n   */\n  ;\n\n  _proto.description = function description() {\n    var desc = this.options_.description || this.localize('This is a modal window.'); // Append a universal closeability message if the modal is closeable.\n\n    if (this.closeable()) {\n      desc += ' ' + this.localize('This modal can be closed by pressing the Escape key or activating the close button.');\n    }\n\n    return desc;\n  }\n  /**\n   * Opens the modal.\n   *\n   * @fires ModalDialog#beforemodalopen\n   * @fires ModalDialog#modalopen\n   */\n  ;\n\n  _proto.open = function open() {\n    if (!this.opened_) {\n      var player = this.player();\n      /**\n        * Fired just before a `ModalDialog` is opened.\n        *\n        * @event ModalDialog#beforemodalopen\n        * @type {EventTarget~Event}\n        */\n\n      this.trigger('beforemodalopen');\n      this.opened_ = true; // Fill content if the modal has never opened before and\n      // never been filled.\n\n      if (this.options_.fillAlways || !this.hasBeenOpened_ && !this.hasBeenFilled_) {\n        this.fill();\n      } // If the player was playing, pause it and take note of its previously\n      // playing state.\n\n\n      this.wasPlaying_ = !player.paused();\n\n      if (this.options_.pauseOnOpen && this.wasPlaying_) {\n        player.pause();\n      }\n\n      this.on('keydown', this.handleKeyDown); // Hide controls and note if they were enabled.\n\n      this.hadControls_ = player.controls();\n      player.controls(false);\n      this.show();\n      this.conditionalFocus_();\n      this.el().setAttribute('aria-hidden', 'false');\n      /**\n        * Fired just after a `ModalDialog` is opened.\n        *\n        * @event ModalDialog#modalopen\n        * @type {EventTarget~Event}\n        */\n\n      this.trigger('modalopen');\n      this.hasBeenOpened_ = true;\n    }\n  }\n  /**\n   * If the `ModalDialog` is currently open or closed.\n   *\n   * @param  {boolean} [value]\n   *         If given, it will open (`true`) or close (`false`) the modal.\n   *\n   * @return {boolean}\n   *         the current open state of the modaldialog\n   */\n  ;\n\n  _proto.opened = function opened(value) {\n    if (typeof value === 'boolean') {\n      this[value ? 'open' : 'close']();\n    }\n\n    return this.opened_;\n  }\n  /**\n   * Closes the modal, does nothing if the `ModalDialog` is\n   * not open.\n   *\n   * @fires ModalDialog#beforemodalclose\n   * @fires ModalDialog#modalclose\n   */\n  ;\n\n  _proto.close = function close() {\n    if (!this.opened_) {\n      return;\n    }\n\n    var player = this.player();\n    /**\n      * Fired just before a `ModalDialog` is closed.\n      *\n      * @event ModalDialog#beforemodalclose\n      * @type {EventTarget~Event}\n      */\n\n    this.trigger('beforemodalclose');\n    this.opened_ = false;\n\n    if (this.wasPlaying_ && this.options_.pauseOnOpen) {\n      player.play();\n    }\n\n    this.off('keydown', this.handleKeyDown);\n\n    if (this.hadControls_) {\n      player.controls(true);\n    }\n\n    this.hide();\n    this.el().setAttribute('aria-hidden', 'true');\n    /**\n      * Fired just after a `ModalDialog` is closed.\n      *\n      * @event ModalDialog#modalclose\n      * @type {EventTarget~Event}\n      */\n\n    this.trigger('modalclose');\n    this.conditionalBlur_();\n\n    if (this.options_.temporary) {\n      this.dispose();\n    }\n  }\n  /**\n   * Check to see if the `ModalDialog` is closeable via the UI.\n   *\n   * @param  {boolean} [value]\n   *         If given as a boolean, it will set the `closeable` option.\n   *\n   * @return {boolean}\n   *         Returns the final value of the closable option.\n   */\n  ;\n\n  _proto.closeable = function closeable(value) {\n    if (typeof value === 'boolean') {\n      var closeable = this.closeable_ = !!value;\n      var close = this.getChild('closeButton'); // If this is being made closeable and has no close button, add one.\n\n      if (closeable && !close) {\n        // The close button should be a child of the modal - not its\n        // content element, so temporarily change the content element.\n        var temp = this.contentEl_;\n        this.contentEl_ = this.el_;\n        close = this.addChild('closeButton', {\n          controlText: 'Close Modal Dialog'\n        });\n        this.contentEl_ = temp;\n        this.on(close, 'close', this.close);\n      } // If this is being made uncloseable and has a close button, remove it.\n\n\n      if (!closeable && close) {\n        this.off(close, 'close', this.close);\n        this.removeChild(close);\n        close.dispose();\n      }\n    }\n\n    return this.closeable_;\n  }\n  /**\n   * Fill the modal's content element with the modal's \"content\" option.\n   * The content element will be emptied before this change takes place.\n   */\n  ;\n\n  _proto.fill = function fill() {\n    this.fillWith(this.content());\n  }\n  /**\n   * Fill the modal's content element with arbitrary content.\n   * The content element will be emptied before this change takes place.\n   *\n   * @fires ModalDialog#beforemodalfill\n   * @fires ModalDialog#modalfill\n   *\n   * @param {Mixed} [content]\n   *        The same rules apply to this as apply to the `content` option.\n   */\n  ;\n\n  _proto.fillWith = function fillWith(content) {\n    var contentEl = this.contentEl();\n    var parentEl = contentEl.parentNode;\n    var nextSiblingEl = contentEl.nextSibling;\n    /**\n      * Fired just before a `ModalDialog` is filled with content.\n      *\n      * @event ModalDialog#beforemodalfill\n      * @type {EventTarget~Event}\n      */\n\n    this.trigger('beforemodalfill');\n    this.hasBeenFilled_ = true; // Detach the content element from the DOM before performing\n    // manipulation to avoid modifying the live DOM multiple times.\n\n    parentEl.removeChild(contentEl);\n    this.empty();\n    insertContent(contentEl, content);\n    /**\n     * Fired just after a `ModalDialog` is filled with content.\n     *\n     * @event ModalDialog#modalfill\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('modalfill'); // Re-inject the re-filled content element.\n\n    if (nextSiblingEl) {\n      parentEl.insertBefore(contentEl, nextSiblingEl);\n    } else {\n      parentEl.appendChild(contentEl);\n    } // make sure that the close button is last in the dialog DOM\n\n\n    var closeButton = this.getChild('closeButton');\n\n    if (closeButton) {\n      parentEl.appendChild(closeButton.el_);\n    }\n  }\n  /**\n   * Empties the content element. This happens anytime the modal is filled.\n   *\n   * @fires ModalDialog#beforemodalempty\n   * @fires ModalDialog#modalempty\n   */\n  ;\n\n  _proto.empty = function empty() {\n    /**\n    * Fired just before a `ModalDialog` is emptied.\n    *\n    * @event ModalDialog#beforemodalempty\n    * @type {EventTarget~Event}\n    */\n    this.trigger('beforemodalempty');\n    emptyEl(this.contentEl());\n    /**\n    * Fired just after a `ModalDialog` is emptied.\n    *\n    * @event ModalDialog#modalempty\n    * @type {EventTarget~Event}\n    */\n\n    this.trigger('modalempty');\n  }\n  /**\n   * Gets or sets the modal content, which gets normalized before being\n   * rendered into the DOM.\n   *\n   * This does not update the DOM or fill the modal, but it is called during\n   * that process.\n   *\n   * @param  {Mixed} [value]\n   *         If defined, sets the internal content value to be used on the\n   *         next call(s) to `fill`. This value is normalized before being\n   *         inserted. To \"clear\" the internal content value, pass `null`.\n   *\n   * @return {Mixed}\n   *         The current content of the modal dialog\n   */\n  ;\n\n  _proto.content = function content(value) {\n    if (typeof value !== 'undefined') {\n      this.content_ = value;\n    }\n\n    return this.content_;\n  }\n  /**\n   * conditionally focus the modal dialog if focus was previously on the player.\n   *\n   * @private\n   */\n  ;\n\n  _proto.conditionalFocus_ = function conditionalFocus_() {\n    var activeEl = document.activeElement;\n    var playerEl = this.player_.el_;\n    this.previouslyActiveEl_ = null;\n\n    if (playerEl.contains(activeEl) || playerEl === activeEl) {\n      this.previouslyActiveEl_ = activeEl;\n      this.focus();\n    }\n  }\n  /**\n   * conditionally blur the element and refocus the last focused element\n   *\n   * @private\n   */\n  ;\n\n  _proto.conditionalBlur_ = function conditionalBlur_() {\n    if (this.previouslyActiveEl_) {\n      this.previouslyActiveEl_.focus();\n      this.previouslyActiveEl_ = null;\n    }\n  }\n  /**\n   * Keydown handler. Attached when modal is focused.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Do not allow keydowns to reach out of the modal dialog.\n    event.stopPropagation();\n\n    if (keycode.isEventKey(event, 'Escape') && this.closeable()) {\n      event.preventDefault();\n      this.close();\n      return;\n    } // exit early if it isn't a tab key\n\n\n    if (!keycode.isEventKey(event, 'Tab')) {\n      return;\n    }\n\n    var focusableEls = this.focusableEls_();\n    var activeEl = this.el_.querySelector(':focus');\n    var focusIndex;\n\n    for (var i = 0; i < focusableEls.length; i++) {\n      if (activeEl === focusableEls[i]) {\n        focusIndex = i;\n        break;\n      }\n    }\n\n    if (document.activeElement === this.el_) {\n      focusIndex = 0;\n    }\n\n    if (event.shiftKey && focusIndex === 0) {\n      focusableEls[focusableEls.length - 1].focus();\n      event.preventDefault();\n    } else if (!event.shiftKey && focusIndex === focusableEls.length - 1) {\n      focusableEls[0].focus();\n      event.preventDefault();\n    }\n  }\n  /**\n   * get all focusable elements\n   *\n   * @private\n   */\n  ;\n\n  _proto.focusableEls_ = function focusableEls_() {\n    var allChildren = this.el_.querySelectorAll('*');\n    return Array.prototype.filter.call(allChildren, function (child) {\n      return (child instanceof window$1.HTMLAnchorElement || child instanceof window$1.HTMLAreaElement) && child.hasAttribute('href') || (child instanceof window$1.HTMLInputElement || child instanceof window$1.HTMLSelectElement || child instanceof window$1.HTMLTextAreaElement || child instanceof window$1.HTMLButtonElement) && !child.hasAttribute('disabled') || child instanceof window$1.HTMLIFrameElement || child instanceof window$1.HTMLObjectElement || child instanceof window$1.HTMLEmbedElement || child.hasAttribute('tabindex') && child.getAttribute('tabindex') !== -1 || child.hasAttribute('contenteditable');\n    });\n  };\n\n  return ModalDialog;\n}(Component);\n/**\n * Default options for `ModalDialog` default options.\n *\n * @type {Object}\n * @private\n */\n\n\nModalDialog.prototype.options_ = {\n  pauseOnOpen: true,\n  temporary: true\n};\nComponent.registerComponent('ModalDialog', ModalDialog);\n/**\n * Common functionaliy between {@link TextTrackList}, {@link AudioTrackList}, and\n * {@link VideoTrackList}\n *\n * @extends EventTarget\n */\n\nvar TrackList =\n/*#__PURE__*/\nfunction (_EventTarget) {\n  _inheritsLoose(TrackList, _EventTarget);\n  /**\n   * Create an instance of this class\n   *\n   * @param {Track[]} tracks\n   *        A list of tracks to initialize the list with.\n   *\n   * @abstract\n   */\n\n\n  function TrackList(tracks) {\n    var _this;\n\n    if (tracks === void 0) {\n      tracks = [];\n    }\n\n    _this = _EventTarget.call(this) || this;\n    _this.tracks_ = [];\n    /**\n     * @memberof TrackList\n     * @member {number} length\n     *         The current number of `Track`s in the this Trackist.\n     * @instance\n     */\n\n    Object.defineProperty(_assertThisInitialized(_this), 'length', {\n      get: function get() {\n        return this.tracks_.length;\n      }\n    });\n\n    for (var i = 0; i < tracks.length; i++) {\n      _this.addTrack(tracks[i]);\n    }\n\n    return _this;\n  }\n  /**\n   * Add a {@link Track} to the `TrackList`\n   *\n   * @param {Track} track\n   *        The audio, video, or text track to add to the list.\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  var _proto = TrackList.prototype;\n\n  _proto.addTrack = function addTrack(track) {\n    var index = this.tracks_.length;\n\n    if (!('' + index in this)) {\n      Object.defineProperty(this, index, {\n        get: function get() {\n          return this.tracks_[index];\n        }\n      });\n    } // Do not add duplicate tracks\n\n\n    if (this.tracks_.indexOf(track) === -1) {\n      this.tracks_.push(track);\n      /**\n       * Triggered when a track is added to a track list.\n       *\n       * @event TrackList#addtrack\n       * @type {EventTarget~Event}\n       * @property {Track} track\n       *           A reference to track that was added.\n       */\n\n      this.trigger({\n        track: track,\n        type: 'addtrack',\n        target: this\n      });\n    }\n  }\n  /**\n   * Remove a {@link Track} from the `TrackList`\n   *\n   * @param {Track} rtrack\n   *        The audio, video, or text track to remove from the list.\n   *\n   * @fires TrackList#removetrack\n   */\n  ;\n\n  _proto.removeTrack = function removeTrack(rtrack) {\n    var track;\n\n    for (var i = 0, l = this.length; i < l; i++) {\n      if (this[i] === rtrack) {\n        track = this[i];\n\n        if (track.off) {\n          track.off();\n        }\n\n        this.tracks_.splice(i, 1);\n        break;\n      }\n    }\n\n    if (!track) {\n      return;\n    }\n    /**\n     * Triggered when a track is removed from track list.\n     *\n     * @event TrackList#removetrack\n     * @type {EventTarget~Event}\n     * @property {Track} track\n     *           A reference to track that was removed.\n     */\n\n\n    this.trigger({\n      track: track,\n      type: 'removetrack',\n      target: this\n    });\n  }\n  /**\n   * Get a Track from the TrackList by a tracks id\n   *\n   * @param {string} id - the id of the track to get\n   * @method getTrackById\n   * @return {Track}\n   * @private\n   */\n  ;\n\n  _proto.getTrackById = function getTrackById(id) {\n    var result = null;\n\n    for (var i = 0, l = this.length; i < l; i++) {\n      var track = this[i];\n\n      if (track.id === id) {\n        result = track;\n        break;\n      }\n    }\n\n    return result;\n  };\n\n  return TrackList;\n}(EventTarget);\n/**\n * Triggered when a different track is selected/enabled.\n *\n * @event TrackList#change\n * @type {EventTarget~Event}\n */\n\n/**\n * Events that can be called with on + eventName. See {@link EventHandler}.\n *\n * @property {Object} TrackList#allowedEvents_\n * @private\n */\n\n\nTrackList.prototype.allowedEvents_ = {\n  change: 'change',\n  addtrack: 'addtrack',\n  removetrack: 'removetrack'\n}; // emulate attribute EventHandler support to allow for feature detection\n\nfor (var event in TrackList.prototype.allowedEvents_) {\n  TrackList.prototype['on' + event] = null;\n}\n/**\n * Anywhere we call this function we diverge from the spec\n * as we only support one enabled audiotrack at a time\n *\n * @param {AudioTrackList} list\n *        list to work on\n *\n * @param {AudioTrack} track\n *        The track to skip\n *\n * @private\n */\n\n\nvar disableOthers = function disableOthers(list, track) {\n  for (var i = 0; i < list.length; i++) {\n    if (!Object.keys(list[i]).length || track.id === list[i].id) {\n      continue;\n    } // another audio track is enabled, disable it\n\n\n    list[i].enabled = false;\n  }\n};\n/**\n * The current list of {@link AudioTrack} for a media file.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist}\n * @extends TrackList\n */\n\n\nvar AudioTrackList =\n/*#__PURE__*/\nfunction (_TrackList) {\n  _inheritsLoose(AudioTrackList, _TrackList);\n  /**\n   * Create an instance of this class.\n   *\n   * @param {AudioTrack[]} [tracks=[]]\n   *        A list of `AudioTrack` to instantiate the list with.\n   */\n\n\n  function AudioTrackList(tracks) {\n    var _this;\n\n    if (tracks === void 0) {\n      tracks = [];\n    } // make sure only 1 track is enabled\n    // sorted from last index to first index\n\n\n    for (var i = tracks.length - 1; i >= 0; i--) {\n      if (tracks[i].enabled) {\n        disableOthers(tracks, tracks[i]);\n        break;\n      }\n    }\n\n    _this = _TrackList.call(this, tracks) || this;\n    _this.changing_ = false;\n    return _this;\n  }\n  /**\n   * Add an {@link AudioTrack} to the `AudioTrackList`.\n   *\n   * @param {AudioTrack} track\n   *        The AudioTrack to add to the list\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  var _proto = AudioTrackList.prototype;\n\n  _proto.addTrack = function addTrack(track) {\n    var _this2 = this;\n\n    if (track.enabled) {\n      disableOthers(this, track);\n    }\n\n    _TrackList.prototype.addTrack.call(this, track); // native tracks don't have this\n\n\n    if (!track.addEventListener) {\n      return;\n    }\n\n    track.enabledChange_ = function () {\n      // when we are disabling other tracks (since we don't support\n      // more than one track at a time) we will set changing_\n      // to true so that we don't trigger additional change events\n      if (_this2.changing_) {\n        return;\n      }\n\n      _this2.changing_ = true;\n      disableOthers(_this2, track);\n      _this2.changing_ = false;\n\n      _this2.trigger('change');\n    };\n    /**\n     * @listens AudioTrack#enabledchange\n     * @fires TrackList#change\n     */\n\n\n    track.addEventListener('enabledchange', track.enabledChange_);\n  };\n\n  _proto.removeTrack = function removeTrack(rtrack) {\n    _TrackList.prototype.removeTrack.call(this, rtrack);\n\n    if (rtrack.removeEventListener && rtrack.enabledChange_) {\n      rtrack.removeEventListener('enabledchange', rtrack.enabledChange_);\n      rtrack.enabledChange_ = null;\n    }\n  };\n\n  return AudioTrackList;\n}(TrackList);\n/**\n * Un-select all other {@link VideoTrack}s that are selected.\n *\n * @param {VideoTrackList} list\n *        list to work on\n *\n * @param {VideoTrack} track\n *        The track to skip\n *\n * @private\n */\n\n\nvar disableOthers$1 = function disableOthers(list, track) {\n  for (var i = 0; i < list.length; i++) {\n    if (!Object.keys(list[i]).length || track.id === list[i].id) {\n      continue;\n    } // another video track is enabled, disable it\n\n\n    list[i].selected = false;\n  }\n};\n/**\n * The current list of {@link VideoTrack} for a video.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#videotracklist}\n * @extends TrackList\n */\n\n\nvar VideoTrackList =\n/*#__PURE__*/\nfunction (_TrackList) {\n  _inheritsLoose(VideoTrackList, _TrackList);\n  /**\n   * Create an instance of this class.\n   *\n   * @param {VideoTrack[]} [tracks=[]]\n   *        A list of `VideoTrack` to instantiate the list with.\n   */\n\n\n  function VideoTrackList(tracks) {\n    var _this;\n\n    if (tracks === void 0) {\n      tracks = [];\n    } // make sure only 1 track is enabled\n    // sorted from last index to first index\n\n\n    for (var i = tracks.length - 1; i >= 0; i--) {\n      if (tracks[i].selected) {\n        disableOthers$1(tracks, tracks[i]);\n        break;\n      }\n    }\n\n    _this = _TrackList.call(this, tracks) || this;\n    _this.changing_ = false;\n    /**\n     * @member {number} VideoTrackList#selectedIndex\n     *         The current index of the selected {@link VideoTrack`}.\n     */\n\n    Object.defineProperty(_assertThisInitialized(_this), 'selectedIndex', {\n      get: function get() {\n        for (var _i = 0; _i < this.length; _i++) {\n          if (this[_i].selected) {\n            return _i;\n          }\n        }\n\n        return -1;\n      },\n      set: function set() {}\n    });\n    return _this;\n  }\n  /**\n   * Add a {@link VideoTrack} to the `VideoTrackList`.\n   *\n   * @param {VideoTrack} track\n   *        The VideoTrack to add to the list\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  var _proto = VideoTrackList.prototype;\n\n  _proto.addTrack = function addTrack(track) {\n    var _this2 = this;\n\n    if (track.selected) {\n      disableOthers$1(this, track);\n    }\n\n    _TrackList.prototype.addTrack.call(this, track); // native tracks don't have this\n\n\n    if (!track.addEventListener) {\n      return;\n    }\n\n    track.selectedChange_ = function () {\n      if (_this2.changing_) {\n        return;\n      }\n\n      _this2.changing_ = true;\n      disableOthers$1(_this2, track);\n      _this2.changing_ = false;\n\n      _this2.trigger('change');\n    };\n    /**\n     * @listens VideoTrack#selectedchange\n     * @fires TrackList#change\n     */\n\n\n    track.addEventListener('selectedchange', track.selectedChange_);\n  };\n\n  _proto.removeTrack = function removeTrack(rtrack) {\n    _TrackList.prototype.removeTrack.call(this, rtrack);\n\n    if (rtrack.removeEventListener && rtrack.selectedChange_) {\n      rtrack.removeEventListener('selectedchange', rtrack.selectedChange_);\n      rtrack.selectedChange_ = null;\n    }\n  };\n\n  return VideoTrackList;\n}(TrackList);\n/**\n * The current list of {@link TextTrack} for a media file.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttracklist}\n * @extends TrackList\n */\n\n\nvar TextTrackList =\n/*#__PURE__*/\nfunction (_TrackList) {\n  _inheritsLoose(TextTrackList, _TrackList);\n\n  function TextTrackList() {\n    return _TrackList.apply(this, arguments) || this;\n  }\n\n  var _proto = TextTrackList.prototype;\n  /**\n   * Add a {@link TextTrack} to the `TextTrackList`\n   *\n   * @param {TextTrack} track\n   *        The text track to add to the list.\n   *\n   * @fires TrackList#addtrack\n   */\n\n  _proto.addTrack = function addTrack(track) {\n    var _this = this;\n\n    _TrackList.prototype.addTrack.call(this, track);\n\n    if (!this.queueChange_) {\n      this.queueChange_ = function () {\n        return _this.queueTrigger('change');\n      };\n    }\n\n    if (!this.triggerSelectedlanguagechange) {\n      this.triggerSelectedlanguagechange_ = function () {\n        return _this.trigger('selectedlanguagechange');\n      };\n    }\n    /**\n     * @listens TextTrack#modechange\n     * @fires TrackList#change\n     */\n\n\n    track.addEventListener('modechange', this.queueChange_);\n    var nonLanguageTextTrackKind = ['metadata', 'chapters'];\n\n    if (nonLanguageTextTrackKind.indexOf(track.kind) === -1) {\n      track.addEventListener('modechange', this.triggerSelectedlanguagechange_);\n    }\n  };\n\n  _proto.removeTrack = function removeTrack(rtrack) {\n    _TrackList.prototype.removeTrack.call(this, rtrack); // manually remove the event handlers we added\n\n\n    if (rtrack.removeEventListener) {\n      if (this.queueChange_) {\n        rtrack.removeEventListener('modechange', this.queueChange_);\n      }\n\n      if (this.selectedlanguagechange_) {\n        rtrack.removeEventListener('modechange', this.triggerSelectedlanguagechange_);\n      }\n    }\n  };\n\n  return TextTrackList;\n}(TrackList);\n/**\n * @file html-track-element-list.js\n */\n\n/**\n * The current list of {@link HtmlTrackElement}s.\n */\n\n\nvar HtmlTrackElementList =\n/*#__PURE__*/\nfunction () {\n  /**\n   * Create an instance of this class.\n   *\n   * @param {HtmlTrackElement[]} [tracks=[]]\n   *        A list of `HtmlTrackElement` to instantiate the list with.\n   */\n  function HtmlTrackElementList(trackElements) {\n    if (trackElements === void 0) {\n      trackElements = [];\n    }\n\n    this.trackElements_ = [];\n    /**\n     * @memberof HtmlTrackElementList\n     * @member {number} length\n     *         The current number of `Track`s in the this Trackist.\n     * @instance\n     */\n\n    Object.defineProperty(this, 'length', {\n      get: function get() {\n        return this.trackElements_.length;\n      }\n    });\n\n    for (var i = 0, length = trackElements.length; i < length; i++) {\n      this.addTrackElement_(trackElements[i]);\n    }\n  }\n  /**\n   * Add an {@link HtmlTrackElement} to the `HtmlTrackElementList`\n   *\n   * @param {HtmlTrackElement} trackElement\n   *        The track element to add to the list.\n   *\n   * @private\n   */\n\n\n  var _proto = HtmlTrackElementList.prototype;\n\n  _proto.addTrackElement_ = function addTrackElement_(trackElement) {\n    var index = this.trackElements_.length;\n\n    if (!('' + index in this)) {\n      Object.defineProperty(this, index, {\n        get: function get() {\n          return this.trackElements_[index];\n        }\n      });\n    } // Do not add duplicate elements\n\n\n    if (this.trackElements_.indexOf(trackElement) === -1) {\n      this.trackElements_.push(trackElement);\n    }\n  }\n  /**\n   * Get an {@link HtmlTrackElement} from the `HtmlTrackElementList` given an\n   * {@link TextTrack}.\n   *\n   * @param {TextTrack} track\n   *        The track associated with a track element.\n   *\n   * @return {HtmlTrackElement|undefined}\n   *         The track element that was found or undefined.\n   *\n   * @private\n   */\n  ;\n\n  _proto.getTrackElementByTrack_ = function getTrackElementByTrack_(track) {\n    var trackElement_;\n\n    for (var i = 0, length = this.trackElements_.length; i < length; i++) {\n      if (track === this.trackElements_[i].track) {\n        trackElement_ = this.trackElements_[i];\n        break;\n      }\n    }\n\n    return trackElement_;\n  }\n  /**\n   * Remove a {@link HtmlTrackElement} from the `HtmlTrackElementList`\n   *\n   * @param {HtmlTrackElement} trackElement\n   *        The track element to remove from the list.\n   *\n   * @private\n   */\n  ;\n\n  _proto.removeTrackElement_ = function removeTrackElement_(trackElement) {\n    for (var i = 0, length = this.trackElements_.length; i < length; i++) {\n      if (trackElement === this.trackElements_[i]) {\n        if (this.trackElements_[i].track && typeof this.trackElements_[i].track.off === 'function') {\n          this.trackElements_[i].track.off();\n        }\n\n        if (typeof this.trackElements_[i].off === 'function') {\n          this.trackElements_[i].off();\n        }\n\n        this.trackElements_.splice(i, 1);\n        break;\n      }\n    }\n  };\n\n  return HtmlTrackElementList;\n}();\n/**\n * @file text-track-cue-list.js\n */\n\n/**\n * @typedef {Object} TextTrackCueList~TextTrackCue\n *\n * @property {string} id\n *           The unique id for this text track cue\n *\n * @property {number} startTime\n *           The start time for this text track cue\n *\n * @property {number} endTime\n *           The end time for this text track cue\n *\n * @property {boolean} pauseOnExit\n *           Pause when the end time is reached if true.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackcue}\n */\n\n/**\n * A List of TextTrackCues.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackcuelist}\n */\n\n\nvar TextTrackCueList =\n/*#__PURE__*/\nfunction () {\n  /**\n   * Create an instance of this class..\n   *\n   * @param {Array} cues\n   *        A list of cues to be initialized with\n   */\n  function TextTrackCueList(cues) {\n    TextTrackCueList.prototype.setCues_.call(this, cues);\n    /**\n     * @memberof TextTrackCueList\n     * @member {number} length\n     *         The current number of `TextTrackCue`s in the TextTrackCueList.\n     * @instance\n     */\n\n    Object.defineProperty(this, 'length', {\n      get: function get() {\n        return this.length_;\n      }\n    });\n  }\n  /**\n   * A setter for cues in this list. Creates getters\n   * an an index for the cues.\n   *\n   * @param {Array} cues\n   *        An array of cues to set\n   *\n   * @private\n   */\n\n\n  var _proto = TextTrackCueList.prototype;\n\n  _proto.setCues_ = function setCues_(cues) {\n    var oldLength = this.length || 0;\n    var i = 0;\n    var l = cues.length;\n    this.cues_ = cues;\n    this.length_ = cues.length;\n\n    var defineProp = function defineProp(index) {\n      if (!('' + index in this)) {\n        Object.defineProperty(this, '' + index, {\n          get: function get() {\n            return this.cues_[index];\n          }\n        });\n      }\n    };\n\n    if (oldLength < l) {\n      i = oldLength;\n\n      for (; i < l; i++) {\n        defineProp.call(this, i);\n      }\n    }\n  }\n  /**\n   * Get a `TextTrackCue` that is currently in the `TextTrackCueList` by id.\n   *\n   * @param {string} id\n   *        The id of the cue that should be searched for.\n   *\n   * @return {TextTrackCueList~TextTrackCue|null}\n   *         A single cue or null if none was found.\n   */\n  ;\n\n  _proto.getCueById = function getCueById(id) {\n    var result = null;\n\n    for (var i = 0, l = this.length; i < l; i++) {\n      var cue = this[i];\n\n      if (cue.id === id) {\n        result = cue;\n        break;\n      }\n    }\n\n    return result;\n  };\n\n  return TextTrackCueList;\n}();\n/**\n * @file track-kinds.js\n */\n\n/**\n * All possible `VideoTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-videotrack-kind\n * @typedef VideoTrack~Kind\n * @enum\n */\n\n\nvar VideoTrackKind = {\n  alternative: 'alternative',\n  captions: 'captions',\n  main: 'main',\n  sign: 'sign',\n  subtitles: 'subtitles',\n  commentary: 'commentary'\n};\n/**\n * All possible `AudioTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-audiotrack-kind\n * @typedef AudioTrack~Kind\n * @enum\n */\n\nvar AudioTrackKind = {\n  'alternative': 'alternative',\n  'descriptions': 'descriptions',\n  'main': 'main',\n  'main-desc': 'main-desc',\n  'translation': 'translation',\n  'commentary': 'commentary'\n};\n/**\n * All possible `TextTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-texttrack-kind\n * @typedef TextTrack~Kind\n * @enum\n */\n\nvar TextTrackKind = {\n  subtitles: 'subtitles',\n  captions: 'captions',\n  descriptions: 'descriptions',\n  chapters: 'chapters',\n  metadata: 'metadata'\n};\n/**\n * All possible `TextTrackMode`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackmode\n * @typedef TextTrack~Mode\n * @enum\n */\n\nvar TextTrackMode = {\n  disabled: 'disabled',\n  hidden: 'hidden',\n  showing: 'showing'\n};\n/**\n * A Track class that contains all of the common functionality for {@link AudioTrack},\n * {@link VideoTrack}, and {@link TextTrack}.\n *\n * > Note: This class should not be used directly\n *\n * @see {@link https://html.spec.whatwg.org/multipage/embedded-content.html}\n * @extends EventTarget\n * @abstract\n */\n\nvar Track =\n/*#__PURE__*/\nfunction (_EventTarget) {\n  _inheritsLoose(Track, _EventTarget);\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} [options={}]\n   *        Object of option names and values\n   *\n   * @param {string} [options.kind='']\n   *        A valid kind for the track type you are creating.\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this AudioTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @abstract\n   */\n\n\n  function Track(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _EventTarget.call(this) || this;\n    var trackProps = {\n      id: options.id || 'vjs_track_' + newGUID(),\n      kind: options.kind || '',\n      label: options.label || '',\n      language: options.language || ''\n    };\n    /**\n     * @memberof Track\n     * @member {string} id\n     *         The id of this track. Cannot be changed after creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    /**\n     * @memberof Track\n     * @member {string} kind\n     *         The kind of track that this is. Cannot be changed after creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    /**\n     * @memberof Track\n     * @member {string} label\n     *         The label of this track. Cannot be changed after creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    /**\n     * @memberof Track\n     * @member {string} language\n     *         The two letter language code for this track. Cannot be changed after\n     *         creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    var _loop = function _loop(key) {\n      Object.defineProperty(_assertThisInitialized(_this), key, {\n        get: function get() {\n          return trackProps[key];\n        },\n        set: function set() {}\n      });\n    };\n\n    for (var key in trackProps) {\n      _loop(key);\n    }\n\n    return _this;\n  }\n\n  return Track;\n}(EventTarget);\n/**\n * @file url.js\n * @module url\n */\n\n/**\n * @typedef {Object} url:URLObject\n *\n * @property {string} protocol\n *           The protocol of the url that was parsed.\n *\n * @property {string} hostname\n *           The hostname of the url that was parsed.\n *\n * @property {string} port\n *           The port of the url that was parsed.\n *\n * @property {string} pathname\n *           The pathname of the url that was parsed.\n *\n * @property {string} search\n *           The search query of the url that was parsed.\n *\n * @property {string} hash\n *           The hash of the url that was parsed.\n *\n * @property {string} host\n *           The host of the url that was parsed.\n */\n\n/**\n * Resolve and parse the elements of a URL.\n *\n * @function\n * @param    {String} url\n *           The url to parse\n *\n * @return   {url:URLObject}\n *           An object of url details\n */\n\n\nvar parseUrl = function parseUrl(url) {\n  var props = ['protocol', 'hostname', 'port', 'pathname', 'search', 'hash', 'host']; // add the url to an anchor and let the browser parse the URL\n\n  var a = document.createElement('a');\n  a.href = url; // IE8 (and 9?) Fix\n  // ie8 doesn't parse the URL correctly until the anchor is actually\n  // added to the body, and an innerHTML is needed to trigger the parsing\n\n  var addToBody = a.host === '' && a.protocol !== 'file:';\n  var div;\n\n  if (addToBody) {\n    div = document.createElement('div');\n    div.innerHTML = \"<a href=\\\"\" + url + \"\\\"></a>\";\n    a = div.firstChild; // prevent the div from affecting layout\n\n    div.setAttribute('style', 'display:none; position:absolute;');\n    document.body.appendChild(div);\n  } // Copy the specific URL properties to a new object\n  // This is also needed for IE8 because the anchor loses its\n  // properties when it's removed from the dom\n\n\n  var details = {};\n\n  for (var i = 0; i < props.length; i++) {\n    details[props[i]] = a[props[i]];\n  } // IE9 adds the port to the host property unlike everyone else. If\n  // a port identifier is added for standard ports, strip it.\n\n\n  if (details.protocol === 'http:') {\n    details.host = details.host.replace(/:80$/, '');\n  }\n\n  if (details.protocol === 'https:') {\n    details.host = details.host.replace(/:443$/, '');\n  }\n\n  if (!details.protocol) {\n    details.protocol = window$1.location.protocol;\n  }\n\n  if (addToBody) {\n    document.body.removeChild(div);\n  }\n\n  return details;\n};\n/**\n * Get absolute version of relative URL. Used to tell Flash the correct URL.\n *\n * @function\n * @param    {string} url\n *           URL to make absolute\n *\n * @return   {string}\n *           Absolute URL\n *\n * @see      http://stackoverflow.com/questions/470832/getting-an-absolute-url-from-a-relative-one-ie6-issue\n */\n\n\nvar getAbsoluteURL = function getAbsoluteURL(url) {\n  // Check if absolute URL\n  if (!url.match(/^https?:\\/\\//)) {\n    // Convert to absolute URL. Flash hosted off-site needs an absolute URL.\n    var div = document.createElement('div');\n    div.innerHTML = \"<a href=\\\"\" + url + \"\\\">x</a>\";\n    url = div.firstChild.href;\n  }\n\n  return url;\n};\n/**\n * Returns the extension of the passed file name. It will return an empty string\n * if passed an invalid path.\n *\n * @function\n * @param    {string} path\n *           The fileName path like '/path/to/file.mp4'\n *\n * @return  {string}\n *           The extension in lower case or an empty string if no\n *           extension could be found.\n */\n\n\nvar getFileExtension = function getFileExtension(path) {\n  if (typeof path === 'string') {\n    var splitPathRe = /^(\\/?)([\\s\\S]*?)((?:\\.{1,2}|[^\\/]+?)(\\.([^\\.\\/\\?]+)))(?:[\\/]*|[\\?].*)$/;\n    var pathParts = splitPathRe.exec(path);\n\n    if (pathParts) {\n      return pathParts.pop().toLowerCase();\n    }\n  }\n\n  return '';\n};\n/**\n * Returns whether the url passed is a cross domain request or not.\n *\n * @function\n * @param    {string} url\n *           The url to check.\n *\n * @return   {boolean}\n *           Whether it is a cross domain request or not.\n */\n\n\nvar isCrossOrigin = function isCrossOrigin(url) {\n  var winLoc = window$1.location;\n  var urlInfo = parseUrl(url); // IE8 protocol relative urls will return ':' for protocol\n\n  var srcProtocol = urlInfo.protocol === ':' ? winLoc.protocol : urlInfo.protocol; // Check if url is for another domain/origin\n  // IE8 doesn't know location.origin, so we won't rely on it here\n\n  var crossOrigin = srcProtocol + urlInfo.host !== winLoc.protocol + winLoc.host;\n  return crossOrigin;\n};\n\nvar Url =\n/*#__PURE__*/\nObject.freeze({\n  parseUrl: parseUrl,\n  getAbsoluteURL: getAbsoluteURL,\n  getFileExtension: getFileExtension,\n  isCrossOrigin: isCrossOrigin\n});\n/**\n * Takes a webvtt file contents and parses it into cues\n *\n * @param {string} srcContent\n *        webVTT file contents\n *\n * @param {TextTrack} track\n *        TextTrack to add cues to. Cues come from the srcContent.\n *\n * @private\n */\n\nvar parseCues = function parseCues(srcContent, track) {\n  var parser = new window$1.WebVTT.Parser(window$1, window$1.vttjs, window$1.WebVTT.StringDecoder());\n  var errors = [];\n\n  parser.oncue = function (cue) {\n    track.addCue(cue);\n  };\n\n  parser.onparsingerror = function (error) {\n    errors.push(error);\n  };\n\n  parser.onflush = function () {\n    track.trigger({\n      type: 'loadeddata',\n      target: track\n    });\n  };\n\n  parser.parse(srcContent);\n\n  if (errors.length > 0) {\n    if (window$1.console && window$1.console.groupCollapsed) {\n      window$1.console.groupCollapsed(\"Text Track parsing errors for \" + track.src);\n    }\n\n    errors.forEach(function (error) {\n      return log.error(error);\n    });\n\n    if (window$1.console && window$1.console.groupEnd) {\n      window$1.console.groupEnd();\n    }\n  }\n\n  parser.flush();\n};\n/**\n * Load a `TextTrack` from a specified url.\n *\n * @param {string} src\n *        Url to load track from.\n *\n * @param {TextTrack} track\n *        Track to add cues to. Comes from the content at the end of `url`.\n *\n * @private\n */\n\n\nvar loadTrack = function loadTrack(src, track) {\n  var opts = {\n    uri: src\n  };\n  var crossOrigin = isCrossOrigin(src);\n\n  if (crossOrigin) {\n    opts.cors = crossOrigin;\n  }\n\n  XHR(opts, bind(this, function (err, response, responseBody) {\n    if (err) {\n      return log.error(err, response);\n    }\n\n    track.loaded_ = true; // Make sure that vttjs has loaded, otherwise, wait till it finished loading\n    // NOTE: this is only used for the alt/video.novtt.js build\n\n    if (typeof window$1.WebVTT !== 'function') {\n      if (track.tech_) {\n        // to prevent use before define eslint error, we define loadHandler\n        // as a let here\n        track.tech_.any(['vttjsloaded', 'vttjserror'], function (event) {\n          if (event.type === 'vttjserror') {\n            log.error(\"vttjs failed to load, stopping trying to process \" + track.src);\n            return;\n          }\n\n          return parseCues(responseBody, track);\n        });\n      }\n    } else {\n      parseCues(responseBody, track);\n    }\n  }));\n};\n/**\n * A representation of a single `TextTrack`.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrack}\n * @extends Track\n */\n\n\nvar TextTrack =\n/*#__PURE__*/\nfunction (_Track) {\n  _inheritsLoose(TextTrack, _Track);\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} options={}\n   *        Object of option names and values\n   *\n   * @param {Tech} options.tech\n   *        A reference to the tech that owns this TextTrack.\n   *\n   * @param {TextTrack~Kind} [options.kind='subtitles']\n   *        A valid text track kind.\n   *\n   * @param {TextTrack~Mode} [options.mode='disabled']\n   *        A valid text track mode.\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this TextTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {string} [options.srclang='']\n   *        A valid two character language code. An alternative, but deprioritized\n   *        version of `options.language`\n   *\n   * @param {string} [options.src]\n   *        A url to TextTrack cues.\n   *\n   * @param {boolean} [options.default]\n   *        If this track should default to on or off.\n   */\n\n\n  function TextTrack(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (!options.tech) {\n      throw new Error('A tech was not provided.');\n    }\n\n    var settings = mergeOptions(options, {\n      kind: TextTrackKind[options.kind] || 'subtitles',\n      language: options.language || options.srclang || ''\n    });\n    var mode = TextTrackMode[settings.mode] || 'disabled';\n    var default_ = settings[\"default\"];\n\n    if (settings.kind === 'metadata' || settings.kind === 'chapters') {\n      mode = 'hidden';\n    }\n\n    _this = _Track.call(this, settings) || this;\n    _this.tech_ = settings.tech;\n    _this.cues_ = [];\n    _this.activeCues_ = [];\n    var cues = new TextTrackCueList(_this.cues_);\n    var activeCues = new TextTrackCueList(_this.activeCues_);\n    var changed = false;\n    var timeupdateHandler = bind(_assertThisInitialized(_this), function () {\n      // Accessing this.activeCues for the side-effects of updating itself\n      // due to its nature as a getter function. Do not remove or cues will\n      // stop updating!\n      // Use the setter to prevent deletion from uglify (pure_getters rule)\n      this.activeCues = this.activeCues;\n\n      if (changed) {\n        this.trigger('cuechange');\n        changed = false;\n      }\n    });\n\n    if (mode !== 'disabled') {\n      _this.tech_.ready(function () {\n        _this.tech_.on('timeupdate', timeupdateHandler);\n      }, true);\n    }\n\n    Object.defineProperties(_assertThisInitialized(_this), {\n      /**\n       * @memberof TextTrack\n       * @member {boolean} default\n       *         If this track was set to be on or off by default. Cannot be changed after\n       *         creation.\n       * @instance\n       *\n       * @readonly\n       */\n      \"default\": {\n        get: function get() {\n          return default_;\n        },\n        set: function set() {}\n      },\n\n      /**\n       * @memberof TextTrack\n       * @member {string} mode\n       *         Set the mode of this TextTrack to a valid {@link TextTrack~Mode}. Will\n       *         not be set if setting to an invalid mode.\n       * @instance\n       *\n       * @fires TextTrack#modechange\n       */\n      mode: {\n        get: function get() {\n          return mode;\n        },\n        set: function set(newMode) {\n          var _this2 = this;\n\n          if (!TextTrackMode[newMode]) {\n            return;\n          }\n\n          mode = newMode;\n\n          if (mode !== 'disabled') {\n            this.tech_.ready(function () {\n              _this2.tech_.on('timeupdate', timeupdateHandler);\n            }, true);\n          } else {\n            this.tech_.off('timeupdate', timeupdateHandler);\n          }\n          /**\n           * An event that fires when mode changes on this track. This allows\n           * the TextTrackList that holds this track to act accordingly.\n           *\n           * > Note: This is not part of the spec!\n           *\n           * @event TextTrack#modechange\n           * @type {EventTarget~Event}\n           */\n\n\n          this.trigger('modechange');\n        }\n      },\n\n      /**\n       * @memberof TextTrack\n       * @member {TextTrackCueList} cues\n       *         The text track cue list for this TextTrack.\n       * @instance\n       */\n      cues: {\n        get: function get() {\n          if (!this.loaded_) {\n            return null;\n          }\n\n          return cues;\n        },\n        set: function set() {}\n      },\n\n      /**\n       * @memberof TextTrack\n       * @member {TextTrackCueList} activeCues\n       *         The list text track cues that are currently active for this TextTrack.\n       * @instance\n       */\n      activeCues: {\n        get: function get() {\n          if (!this.loaded_) {\n            return null;\n          } // nothing to do\n\n\n          if (this.cues.length === 0) {\n            return activeCues;\n          }\n\n          var ct = this.tech_.currentTime();\n          var active = [];\n\n          for (var i = 0, l = this.cues.length; i < l; i++) {\n            var cue = this.cues[i];\n\n            if (cue.startTime <= ct && cue.endTime >= ct) {\n              active.push(cue);\n            } else if (cue.startTime === cue.endTime && cue.startTime <= ct && cue.startTime + 0.5 >= ct) {\n              active.push(cue);\n            }\n          }\n\n          changed = false;\n\n          if (active.length !== this.activeCues_.length) {\n            changed = true;\n          } else {\n            for (var _i = 0; _i < active.length; _i++) {\n              if (this.activeCues_.indexOf(active[_i]) === -1) {\n                changed = true;\n              }\n            }\n          }\n\n          this.activeCues_ = active;\n          activeCues.setCues_(this.activeCues_);\n          return activeCues;\n        },\n        // /!\\ Keep this setter empty (see the timeupdate handler above)\n        set: function set() {}\n      }\n    });\n\n    if (settings.src) {\n      _this.src = settings.src;\n      loadTrack(settings.src, _assertThisInitialized(_this));\n    } else {\n      _this.loaded_ = true;\n    }\n\n    return _this;\n  }\n  /**\n   * Add a cue to the internal list of cues.\n   *\n   * @param {TextTrack~Cue} cue\n   *        The cue to add to our internal list\n   */\n\n\n  var _proto = TextTrack.prototype;\n\n  _proto.addCue = function addCue(originalCue) {\n    var cue = originalCue;\n\n    if (window$1.vttjs && !(originalCue instanceof window$1.vttjs.VTTCue)) {\n      cue = new window$1.vttjs.VTTCue(originalCue.startTime, originalCue.endTime, originalCue.text);\n\n      for (var prop in originalCue) {\n        if (!(prop in cue)) {\n          cue[prop] = originalCue[prop];\n        }\n      } // make sure that `id` is copied over\n\n\n      cue.id = originalCue.id;\n      cue.originalCue_ = originalCue;\n    }\n\n    var tracks = this.tech_.textTracks();\n\n    for (var i = 0; i < tracks.length; i++) {\n      if (tracks[i] !== this) {\n        tracks[i].removeCue(cue);\n      }\n    }\n\n    this.cues_.push(cue);\n    this.cues.setCues_(this.cues_);\n  }\n  /**\n   * Remove a cue from our internal list\n   *\n   * @param {TextTrack~Cue} removeCue\n   *        The cue to remove from our internal list\n   */\n  ;\n\n  _proto.removeCue = function removeCue(_removeCue) {\n    var i = this.cues_.length;\n\n    while (i--) {\n      var cue = this.cues_[i];\n\n      if (cue === _removeCue || cue.originalCue_ && cue.originalCue_ === _removeCue) {\n        this.cues_.splice(i, 1);\n        this.cues.setCues_(this.cues_);\n        break;\n      }\n    }\n  };\n\n  return TextTrack;\n}(Track);\n/**\n * cuechange - One or more cues in the track have become active or stopped being active.\n */\n\n\nTextTrack.prototype.allowedEvents_ = {\n  cuechange: 'cuechange'\n};\n/**\n * A representation of a single `AudioTrack`. If it is part of an {@link AudioTrackList}\n * only one `AudioTrack` in the list will be enabled at a time.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotrack}\n * @extends Track\n */\n\nvar AudioTrack =\n/*#__PURE__*/\nfunction (_Track) {\n  _inheritsLoose(AudioTrack, _Track);\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} [options={}]\n   *        Object of option names and values\n   *\n   * @param {AudioTrack~Kind} [options.kind='']\n   *        A valid audio track kind\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this AudioTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {boolean} [options.enabled]\n   *        If this track is the one that is currently playing. If this track is part of\n   *        an {@link AudioTrackList}, only one {@link AudioTrack} will be enabled.\n   */\n\n\n  function AudioTrack(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    var settings = mergeOptions(options, {\n      kind: AudioTrackKind[options.kind] || ''\n    });\n    _this = _Track.call(this, settings) || this;\n    var enabled = false;\n    /**\n     * @memberof AudioTrack\n     * @member {boolean} enabled\n     *         If this `AudioTrack` is enabled or not. When setting this will\n     *         fire {@link AudioTrack#enabledchange} if the state of enabled is changed.\n     * @instance\n     *\n     * @fires VideoTrack#selectedchange\n     */\n\n    Object.defineProperty(_assertThisInitialized(_this), 'enabled', {\n      get: function get() {\n        return enabled;\n      },\n      set: function set(newEnabled) {\n        // an invalid or unchanged value\n        if (typeof newEnabled !== 'boolean' || newEnabled === enabled) {\n          return;\n        }\n\n        enabled = newEnabled;\n        /**\n         * An event that fires when enabled changes on this track. This allows\n         * the AudioTrackList that holds this track to act accordingly.\n         *\n         * > Note: This is not part of the spec! Native tracks will do\n         *         this internally without an event.\n         *\n         * @event AudioTrack#enabledchange\n         * @type {EventTarget~Event}\n         */\n\n        this.trigger('enabledchange');\n      }\n    }); // if the user sets this track to selected then\n    // set selected to that true value otherwise\n    // we keep it false\n\n    if (settings.enabled) {\n      _this.enabled = settings.enabled;\n    }\n\n    _this.loaded_ = true;\n    return _this;\n  }\n\n  return AudioTrack;\n}(Track);\n/**\n * A representation of a single `VideoTrack`.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#videotrack}\n * @extends Track\n */\n\n\nvar VideoTrack =\n/*#__PURE__*/\nfunction (_Track) {\n  _inheritsLoose(VideoTrack, _Track);\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} [options={}]\n   *        Object of option names and values\n   *\n   * @param {string} [options.kind='']\n   *        A valid {@link VideoTrack~Kind}\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this AudioTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {boolean} [options.selected]\n   *        If this track is the one that is currently playing.\n   */\n\n\n  function VideoTrack(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    var settings = mergeOptions(options, {\n      kind: VideoTrackKind[options.kind] || ''\n    });\n    _this = _Track.call(this, settings) || this;\n    var selected = false;\n    /**\n     * @memberof VideoTrack\n     * @member {boolean} selected\n     *         If this `VideoTrack` is selected or not. When setting this will\n     *         fire {@link VideoTrack#selectedchange} if the state of selected changed.\n     * @instance\n     *\n     * @fires VideoTrack#selectedchange\n     */\n\n    Object.defineProperty(_assertThisInitialized(_this), 'selected', {\n      get: function get() {\n        return selected;\n      },\n      set: function set(newSelected) {\n        // an invalid or unchanged value\n        if (typeof newSelected !== 'boolean' || newSelected === selected) {\n          return;\n        }\n\n        selected = newSelected;\n        /**\n         * An event that fires when selected changes on this track. This allows\n         * the VideoTrackList that holds this track to act accordingly.\n         *\n         * > Note: This is not part of the spec! Native tracks will do\n         *         this internally without an event.\n         *\n         * @event VideoTrack#selectedchange\n         * @type {EventTarget~Event}\n         */\n\n        this.trigger('selectedchange');\n      }\n    }); // if the user sets this track to selected then\n    // set selected to that true value otherwise\n    // we keep it false\n\n    if (settings.selected) {\n      _this.selected = settings.selected;\n    }\n\n    return _this;\n  }\n\n  return VideoTrack;\n}(Track);\n/**\n * @memberof HTMLTrackElement\n * @typedef {HTMLTrackElement~ReadyState}\n * @enum {number}\n */\n\n\nvar NONE = 0;\nvar LOADING = 1;\nvar LOADED = 2;\nvar ERROR = 3;\n/**\n * A single track represented in the DOM.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#htmltrackelement}\n * @extends EventTarget\n */\n\nvar HTMLTrackElement =\n/*#__PURE__*/\nfunction (_EventTarget) {\n  _inheritsLoose(HTMLTrackElement, _EventTarget);\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} options={}\n   *        Object of option names and values\n   *\n   * @param {Tech} options.tech\n   *        A reference to the tech that owns this HTMLTrackElement.\n   *\n   * @param {TextTrack~Kind} [options.kind='subtitles']\n   *        A valid text track kind.\n   *\n   * @param {TextTrack~Mode} [options.mode='disabled']\n   *        A valid text track mode.\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this TextTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {string} [options.srclang='']\n   *        A valid two character language code. An alternative, but deprioritized\n   *        vesion of `options.language`\n   *\n   * @param {string} [options.src]\n   *        A url to TextTrack cues.\n   *\n   * @param {boolean} [options.default]\n   *        If this track should default to on or off.\n   */\n\n\n  function HTMLTrackElement(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _EventTarget.call(this) || this;\n    var readyState;\n    var track = new TextTrack(options);\n    _this.kind = track.kind;\n    _this.src = track.src;\n    _this.srclang = track.language;\n    _this.label = track.label;\n    _this[\"default\"] = track[\"default\"];\n    Object.defineProperties(_assertThisInitialized(_this), {\n      /**\n       * @memberof HTMLTrackElement\n       * @member {HTMLTrackElement~ReadyState} readyState\n       *         The current ready state of the track element.\n       * @instance\n       */\n      readyState: {\n        get: function get() {\n          return readyState;\n        }\n      },\n\n      /**\n       * @memberof HTMLTrackElement\n       * @member {TextTrack} track\n       *         The underlying TextTrack object.\n       * @instance\n       *\n       */\n      track: {\n        get: function get() {\n          return track;\n        }\n      }\n    });\n    readyState = NONE;\n    /**\n     * @listens TextTrack#loadeddata\n     * @fires HTMLTrackElement#load\n     */\n\n    track.addEventListener('loadeddata', function () {\n      readyState = LOADED;\n\n      _this.trigger({\n        type: 'load',\n        target: _assertThisInitialized(_this)\n      });\n    });\n    return _this;\n  }\n\n  return HTMLTrackElement;\n}(EventTarget);\n\nHTMLTrackElement.prototype.allowedEvents_ = {\n  load: 'load'\n};\nHTMLTrackElement.NONE = NONE;\nHTMLTrackElement.LOADING = LOADING;\nHTMLTrackElement.LOADED = LOADED;\nHTMLTrackElement.ERROR = ERROR;\n/*\n * This file contains all track properties that are used in\n * player.js, tech.js, html5.js and possibly other techs in the future.\n */\n\nvar NORMAL = {\n  audio: {\n    ListClass: AudioTrackList,\n    TrackClass: AudioTrack,\n    capitalName: 'Audio'\n  },\n  video: {\n    ListClass: VideoTrackList,\n    TrackClass: VideoTrack,\n    capitalName: 'Video'\n  },\n  text: {\n    ListClass: TextTrackList,\n    TrackClass: TextTrack,\n    capitalName: 'Text'\n  }\n};\nObject.keys(NORMAL).forEach(function (type) {\n  NORMAL[type].getterName = type + \"Tracks\";\n  NORMAL[type].privateName = type + \"Tracks_\";\n});\nvar REMOTE = {\n  remoteText: {\n    ListClass: TextTrackList,\n    TrackClass: TextTrack,\n    capitalName: 'RemoteText',\n    getterName: 'remoteTextTracks',\n    privateName: 'remoteTextTracks_'\n  },\n  remoteTextEl: {\n    ListClass: HtmlTrackElementList,\n    TrackClass: HTMLTrackElement,\n    capitalName: 'RemoteTextTrackEls',\n    getterName: 'remoteTextTrackEls',\n    privateName: 'remoteTextTrackEls_'\n  }\n};\nvar ALL = mergeOptions(NORMAL, REMOTE);\nREMOTE.names = Object.keys(REMOTE);\nNORMAL.names = Object.keys(NORMAL);\nALL.names = [].concat(REMOTE.names).concat(NORMAL.names);\n/**\n * An Object containing a structure like: `{src: 'url', type: 'mimetype'}` or string\n * that just contains the src url alone.\n * * `var SourceObject = {src: 'http://ex.com/video.mp4', type: 'video/mp4'};`\n   * `var SourceString = 'http://example.com/some-video.mp4';`\n *\n * @typedef {Object|string} Tech~SourceObject\n *\n * @property {string} src\n *           The url to the source\n *\n * @property {string} type\n *           The mime type of the source\n */\n\n/**\n * A function used by {@link Tech} to create a new {@link TextTrack}.\n *\n * @private\n *\n * @param {Tech} self\n *        An instance of the Tech class.\n *\n * @param {string} kind\n *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n *\n * @param {string} [label]\n *        Label to identify the text track\n *\n * @param {string} [language]\n *        Two letter language abbreviation\n *\n * @param {Object} [options={}]\n *        An object with additional text track options\n *\n * @return {TextTrack}\n *          The text track that was created.\n */\n\nfunction createTrackHelper(self, kind, label, language, options) {\n  if (options === void 0) {\n    options = {};\n  }\n\n  var tracks = self.textTracks();\n  options.kind = kind;\n\n  if (label) {\n    options.label = label;\n  }\n\n  if (language) {\n    options.language = language;\n  }\n\n  options.tech = self;\n  var track = new ALL.text.TrackClass(options);\n  tracks.addTrack(track);\n  return track;\n}\n/**\n * This is the base class for media playback technology controllers, such as\n * {@link Flash} and {@link HTML5}\n *\n * @extends Component\n */\n\n\nvar Tech =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(Tech, _Component);\n  /**\n  * Create an instance of this Tech.\n  *\n  * @param {Object} [options]\n  *        The key/value store of player options.\n  *\n  * @param {Component~ReadyCallback} ready\n  *        Callback function to call when the `HTML5` Tech is ready.\n  */\n\n\n  function Tech(options, ready) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (ready === void 0) {\n      ready = function ready() {};\n    } // we don't want the tech to report user activity automatically.\n    // This is done manually in addControlsListeners\n\n\n    options.reportTouchActivity = false;\n    _this = _Component.call(this, null, options, ready) || this; // keep track of whether the current source has played at all to\n    // implement a very limited played()\n\n    _this.hasStarted_ = false;\n\n    _this.on('playing', function () {\n      this.hasStarted_ = true;\n    });\n\n    _this.on('loadstart', function () {\n      this.hasStarted_ = false;\n    });\n\n    ALL.names.forEach(function (name) {\n      var props = ALL[name];\n\n      if (options && options[props.getterName]) {\n        _this[props.privateName] = options[props.getterName];\n      }\n    }); // Manually track progress in cases where the browser/flash player doesn't report it.\n\n    if (!_this.featuresProgressEvents) {\n      _this.manualProgressOn();\n    } // Manually track timeupdates in cases where the browser/flash player doesn't report it.\n\n\n    if (!_this.featuresTimeupdateEvents) {\n      _this.manualTimeUpdatesOn();\n    }\n\n    ['Text', 'Audio', 'Video'].forEach(function (track) {\n      if (options[\"native\" + track + \"Tracks\"] === false) {\n        _this[\"featuresNative\" + track + \"Tracks\"] = false;\n      }\n    });\n\n    if (options.nativeCaptions === false || options.nativeTextTracks === false) {\n      _this.featuresNativeTextTracks = false;\n    } else if (options.nativeCaptions === true || options.nativeTextTracks === true) {\n      _this.featuresNativeTextTracks = true;\n    }\n\n    if (!_this.featuresNativeTextTracks) {\n      _this.emulateTextTracks();\n    }\n\n    _this.autoRemoteTextTracks_ = new ALL.text.ListClass();\n\n    _this.initTrackListeners(); // Turn on component tap events only if not using native controls\n\n\n    if (!options.nativeControlsForTouch) {\n      _this.emitTapEvents();\n    }\n\n    if (_this.constructor) {\n      _this.name_ = _this.constructor.name || 'Unknown Tech';\n    }\n\n    return _this;\n  }\n  /**\n   * A special function to trigger source set in a way that will allow player\n   * to re-trigger if the player or tech are not ready yet.\n   *\n   * @fires Tech#sourceset\n   * @param {string} src The source string at the time of the source changing.\n   */\n\n\n  var _proto = Tech.prototype;\n\n  _proto.triggerSourceset = function triggerSourceset(src) {\n    var _this2 = this;\n\n    if (!this.isReady_) {\n      // on initial ready we have to trigger source set\n      // 1ms after ready so that player can watch for it.\n      this.one('ready', function () {\n        return _this2.setTimeout(function () {\n          return _this2.triggerSourceset(src);\n        }, 1);\n      });\n    }\n    /**\n     * Fired when the source is set on the tech causing the media element\n     * to reload.\n     *\n     * @see {@link Player#event:sourceset}\n     * @event Tech#sourceset\n     * @type {EventTarget~Event}\n     */\n\n\n    this.trigger({\n      src: src,\n      type: 'sourceset'\n    });\n  }\n  /* Fallbacks for unsupported event types\n  ================================================================================ */\n\n  /**\n   * Polyfill the `progress` event for browsers that don't support it natively.\n   *\n   * @see {@link Tech#trackProgress}\n   */\n  ;\n\n  _proto.manualProgressOn = function manualProgressOn() {\n    this.on('durationchange', this.onDurationChange);\n    this.manualProgress = true; // Trigger progress watching when a source begins loading\n\n    this.one('ready', this.trackProgress);\n  }\n  /**\n   * Turn off the polyfill for `progress` events that was created in\n   * {@link Tech#manualProgressOn}\n   */\n  ;\n\n  _proto.manualProgressOff = function manualProgressOff() {\n    this.manualProgress = false;\n    this.stopTrackingProgress();\n    this.off('durationchange', this.onDurationChange);\n  }\n  /**\n   * This is used to trigger a `progress` event when the buffered percent changes. It\n   * sets an interval function that will be called every 500 milliseconds to check if the\n   * buffer end percent has changed.\n   *\n   * > This function is called by {@link Tech#manualProgressOn}\n   *\n   * @param {EventTarget~Event} event\n   *        The `ready` event that caused this to run.\n   *\n   * @listens Tech#ready\n   * @fires Tech#progress\n   */\n  ;\n\n  _proto.trackProgress = function trackProgress(event) {\n    this.stopTrackingProgress();\n    this.progressInterval = this.setInterval(bind(this, function () {\n      // Don't trigger unless buffered amount is greater than last time\n      var numBufferedPercent = this.bufferedPercent();\n\n      if (this.bufferedPercent_ !== numBufferedPercent) {\n        /**\n         * See {@link Player#progress}\n         *\n         * @event Tech#progress\n         * @type {EventTarget~Event}\n         */\n        this.trigger('progress');\n      }\n\n      this.bufferedPercent_ = numBufferedPercent;\n\n      if (numBufferedPercent === 1) {\n        this.stopTrackingProgress();\n      }\n    }), 500);\n  }\n  /**\n   * Update our internal duration on a `durationchange` event by calling\n   * {@link Tech#duration}.\n   *\n   * @param {EventTarget~Event} event\n   *        The `durationchange` event that caused this to run.\n   *\n   * @listens Tech#durationchange\n   */\n  ;\n\n  _proto.onDurationChange = function onDurationChange(event) {\n    this.duration_ = this.duration();\n  }\n  /**\n   * Get and create a `TimeRange` object for buffering.\n   *\n   * @return {TimeRange}\n   *         The time range object that was created.\n   */\n  ;\n\n  _proto.buffered = function buffered() {\n    return createTimeRanges(0, 0);\n  }\n  /**\n   * Get the percentage of the current video that is currently buffered.\n   *\n   * @return {number}\n   *         A number from 0 to 1 that represents the decimal percentage of the\n   *         video that is buffered.\n   *\n   */\n  ;\n\n  _proto.bufferedPercent = function bufferedPercent$1() {\n    return bufferedPercent(this.buffered(), this.duration_);\n  }\n  /**\n   * Turn off the polyfill for `progress` events that was created in\n   * {@link Tech#manualProgressOn}\n   * Stop manually tracking progress events by clearing the interval that was set in\n   * {@link Tech#trackProgress}.\n   */\n  ;\n\n  _proto.stopTrackingProgress = function stopTrackingProgress() {\n    this.clearInterval(this.progressInterval);\n  }\n  /**\n   * Polyfill the `timeupdate` event for browsers that don't support it.\n   *\n   * @see {@link Tech#trackCurrentTime}\n   */\n  ;\n\n  _proto.manualTimeUpdatesOn = function manualTimeUpdatesOn() {\n    this.manualTimeUpdates = true;\n    this.on('play', this.trackCurrentTime);\n    this.on('pause', this.stopTrackingCurrentTime);\n  }\n  /**\n   * Turn off the polyfill for `timeupdate` events that was created in\n   * {@link Tech#manualTimeUpdatesOn}\n   */\n  ;\n\n  _proto.manualTimeUpdatesOff = function manualTimeUpdatesOff() {\n    this.manualTimeUpdates = false;\n    this.stopTrackingCurrentTime();\n    this.off('play', this.trackCurrentTime);\n    this.off('pause', this.stopTrackingCurrentTime);\n  }\n  /**\n   * Sets up an interval function to track current time and trigger `timeupdate` every\n   * 250 milliseconds.\n   *\n   * @listens Tech#play\n   * @triggers Tech#timeupdate\n   */\n  ;\n\n  _proto.trackCurrentTime = function trackCurrentTime() {\n    if (this.currentTimeInterval) {\n      this.stopTrackingCurrentTime();\n    }\n\n    this.currentTimeInterval = this.setInterval(function () {\n      /**\n       * Triggered at an interval of 250ms to indicated that time is passing in the video.\n       *\n       * @event Tech#timeupdate\n       * @type {EventTarget~Event}\n       */\n      this.trigger({\n        type: 'timeupdate',\n        target: this,\n        manuallyTriggered: true\n      }); // 42 = 24 fps // 250 is what Webkit uses // FF uses 15\n    }, 250);\n  }\n  /**\n   * Stop the interval function created in {@link Tech#trackCurrentTime} so that the\n   * `timeupdate` event is no longer triggered.\n   *\n   * @listens {Tech#pause}\n   */\n  ;\n\n  _proto.stopTrackingCurrentTime = function stopTrackingCurrentTime() {\n    this.clearInterval(this.currentTimeInterval); // #1002 - if the video ends right before the next timeupdate would happen,\n    // the progress bar won't make it all the way to the end\n\n    this.trigger({\n      type: 'timeupdate',\n      target: this,\n      manuallyTriggered: true\n    });\n  }\n  /**\n   * Turn off all event polyfills, clear the `Tech`s {@link AudioTrackList},\n   * {@link VideoTrackList}, and {@link TextTrackList}, and dispose of this Tech.\n   *\n   * @fires Component#dispose\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    // clear out all tracks because we can't reuse them between techs\n    this.clearTracks(NORMAL.names); // Turn off any manual progress or timeupdate tracking\n\n    if (this.manualProgress) {\n      this.manualProgressOff();\n    }\n\n    if (this.manualTimeUpdates) {\n      this.manualTimeUpdatesOff();\n    }\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Clear out a single `TrackList` or an array of `TrackLists` given their names.\n   *\n   * > Note: Techs without source handlers should call this between sources for `video`\n   *         & `audio` tracks. You don't want to use them between tracks!\n   *\n   * @param {string[]|string} types\n   *        TrackList names to clear, valid names are `video`, `audio`, and\n   *        `text`.\n   */\n  ;\n\n  _proto.clearTracks = function clearTracks(types) {\n    var _this3 = this;\n\n    types = [].concat(types); // clear out all tracks because we can't reuse them between techs\n\n    types.forEach(function (type) {\n      var list = _this3[type + \"Tracks\"]() || [];\n      var i = list.length;\n\n      while (i--) {\n        var track = list[i];\n\n        if (type === 'text') {\n          _this3.removeRemoteTextTrack(track);\n        }\n\n        list.removeTrack(track);\n      }\n    });\n  }\n  /**\n   * Remove any TextTracks added via addRemoteTextTrack that are\n   * flagged for automatic garbage collection\n   */\n  ;\n\n  _proto.cleanupAutoTextTracks = function cleanupAutoTextTracks() {\n    var list = this.autoRemoteTextTracks_ || [];\n    var i = list.length;\n\n    while (i--) {\n      var track = list[i];\n      this.removeRemoteTextTrack(track);\n    }\n  }\n  /**\n   * Reset the tech, which will removes all sources and reset the internal readyState.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.reset = function reset() {}\n  /**\n   * Get or set an error on the Tech.\n   *\n   * @param {MediaError} [err]\n   *        Error to set on the Tech\n   *\n   * @return {MediaError|null}\n   *         The current error object on the tech, or null if there isn't one.\n   */\n  ;\n\n  _proto.error = function error(err) {\n    if (err !== undefined) {\n      this.error_ = new MediaError(err);\n      this.trigger('error');\n    }\n\n    return this.error_;\n  }\n  /**\n   * Returns the `TimeRange`s that have been played through for the current source.\n   *\n   * > NOTE: This implementation is incomplete. It does not track the played `TimeRange`.\n   *         It only checks whether the source has played at all or not.\n   *\n   * @return {TimeRange}\n   *         - A single time range if this video has played\n   *         - An empty set of ranges if not.\n   */\n  ;\n\n  _proto.played = function played() {\n    if (this.hasStarted_) {\n      return createTimeRanges(0, 0);\n    }\n\n    return createTimeRanges();\n  }\n  /**\n   * Causes a manual time update to occur if {@link Tech#manualTimeUpdatesOn} was\n   * previously called.\n   *\n   * @fires Tech#timeupdate\n   */\n  ;\n\n  _proto.setCurrentTime = function setCurrentTime() {\n    // improve the accuracy of manual timeupdates\n    if (this.manualTimeUpdates) {\n      /**\n       * A manual `timeupdate` event.\n       *\n       * @event Tech#timeupdate\n       * @type {EventTarget~Event}\n       */\n      this.trigger({\n        type: 'timeupdate',\n        target: this,\n        manuallyTriggered: true\n      });\n    }\n  }\n  /**\n   * Turn on listeners for {@link VideoTrackList}, {@link {AudioTrackList}, and\n   * {@link TextTrackList} events.\n   *\n   * This adds {@link EventTarget~EventListeners} for `addtrack`, and  `removetrack`.\n   *\n   * @fires Tech#audiotrackchange\n   * @fires Tech#videotrackchange\n   * @fires Tech#texttrackchange\n   */\n  ;\n\n  _proto.initTrackListeners = function initTrackListeners() {\n    var _this4 = this;\n    /**\n      * Triggered when tracks are added or removed on the Tech {@link AudioTrackList}\n      *\n      * @event Tech#audiotrackchange\n      * @type {EventTarget~Event}\n      */\n\n    /**\n      * Triggered when tracks are added or removed on the Tech {@link VideoTrackList}\n      *\n      * @event Tech#videotrackchange\n      * @type {EventTarget~Event}\n      */\n\n    /**\n      * Triggered when tracks are added or removed on the Tech {@link TextTrackList}\n      *\n      * @event Tech#texttrackchange\n      * @type {EventTarget~Event}\n      */\n\n\n    NORMAL.names.forEach(function (name) {\n      var props = NORMAL[name];\n\n      var trackListChanges = function trackListChanges() {\n        _this4.trigger(name + \"trackchange\");\n      };\n\n      var tracks = _this4[props.getterName]();\n\n      tracks.addEventListener('removetrack', trackListChanges);\n      tracks.addEventListener('addtrack', trackListChanges);\n\n      _this4.on('dispose', function () {\n        tracks.removeEventListener('removetrack', trackListChanges);\n        tracks.removeEventListener('addtrack', trackListChanges);\n      });\n    });\n  }\n  /**\n   * Emulate TextTracks using vtt.js if necessary\n   *\n   * @fires Tech#vttjsloaded\n   * @fires Tech#vttjserror\n   */\n  ;\n\n  _proto.addWebVttScript_ = function addWebVttScript_() {\n    var _this5 = this;\n\n    if (window$1.WebVTT) {\n      return;\n    } // Initially, Tech.el_ is a child of a dummy-div wait until the Component system\n    // signals that the Tech is ready at which point Tech.el_ is part of the DOM\n    // before inserting the WebVTT script\n\n\n    if (document.body.contains(this.el())) {\n      // load via require if available and vtt.js script location was not passed in\n      // as an option. novtt builds will turn the above require call into an empty object\n      // which will cause this if check to always fail.\n      if (!this.options_['vtt.js'] && isPlain(vtt) && Object.keys(vtt).length > 0) {\n        this.trigger('vttjsloaded');\n        return;\n      } // load vtt.js via the script location option or the cdn of no location was\n      // passed in\n\n\n      var script = document.createElement('script');\n      script.src = this.options_['vtt.js'] || 'https://vjs.zencdn.net/vttjs/0.14.1/vtt.min.js';\n\n      script.onload = function () {\n        /**\n         * Fired when vtt.js is loaded.\n         *\n         * @event Tech#vttjsloaded\n         * @type {EventTarget~Event}\n         */\n        _this5.trigger('vttjsloaded');\n      };\n\n      script.onerror = function () {\n        /**\n         * Fired when vtt.js was not loaded due to an error\n         *\n         * @event Tech#vttjsloaded\n         * @type {EventTarget~Event}\n         */\n        _this5.trigger('vttjserror');\n      };\n\n      this.on('dispose', function () {\n        script.onload = null;\n        script.onerror = null;\n      }); // but have not loaded yet and we set it to true before the inject so that\n      // we don't overwrite the injected window.WebVTT if it loads right away\n\n      window$1.WebVTT = true;\n      this.el().parentNode.appendChild(script);\n    } else {\n      this.ready(this.addWebVttScript_);\n    }\n  }\n  /**\n   * Emulate texttracks\n   *\n   */\n  ;\n\n  _proto.emulateTextTracks = function emulateTextTracks() {\n    var _this6 = this;\n\n    var tracks = this.textTracks();\n    var remoteTracks = this.remoteTextTracks();\n\n    var handleAddTrack = function handleAddTrack(e) {\n      return tracks.addTrack(e.track);\n    };\n\n    var handleRemoveTrack = function handleRemoveTrack(e) {\n      return tracks.removeTrack(e.track);\n    };\n\n    remoteTracks.on('addtrack', handleAddTrack);\n    remoteTracks.on('removetrack', handleRemoveTrack);\n    this.addWebVttScript_();\n\n    var updateDisplay = function updateDisplay() {\n      return _this6.trigger('texttrackchange');\n    };\n\n    var textTracksChanges = function textTracksChanges() {\n      updateDisplay();\n\n      for (var i = 0; i < tracks.length; i++) {\n        var track = tracks[i];\n        track.removeEventListener('cuechange', updateDisplay);\n\n        if (track.mode === 'showing') {\n          track.addEventListener('cuechange', updateDisplay);\n        }\n      }\n    };\n\n    textTracksChanges();\n    tracks.addEventListener('change', textTracksChanges);\n    tracks.addEventListener('addtrack', textTracksChanges);\n    tracks.addEventListener('removetrack', textTracksChanges);\n    this.on('dispose', function () {\n      remoteTracks.off('addtrack', handleAddTrack);\n      remoteTracks.off('removetrack', handleRemoveTrack);\n      tracks.removeEventListener('change', textTracksChanges);\n      tracks.removeEventListener('addtrack', textTracksChanges);\n      tracks.removeEventListener('removetrack', textTracksChanges);\n\n      for (var i = 0; i < tracks.length; i++) {\n        var track = tracks[i];\n        track.removeEventListener('cuechange', updateDisplay);\n      }\n    });\n  }\n  /**\n   * Create and returns a remote {@link TextTrack} object.\n   *\n   * @param {string} kind\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n   *\n   * @param {string} [label]\n   *        Label to identify the text track\n   *\n   * @param {string} [language]\n   *        Two letter language abbreviation\n   *\n   * @return {TextTrack}\n   *         The TextTrack that gets created.\n   */\n  ;\n\n  _proto.addTextTrack = function addTextTrack(kind, label, language) {\n    if (!kind) {\n      throw new Error('TextTrack kind is required but was not provided');\n    }\n\n    return createTrackHelper(this, kind, label, language);\n  }\n  /**\n   * Create an emulated TextTrack for use by addRemoteTextTrack\n   *\n   * This is intended to be overridden by classes that inherit from\n   * Tech in order to create native or custom TextTracks.\n   *\n   * @param {Object} options\n   *        The object should contain the options to initialize the TextTrack with.\n   *\n   * @param {string} [options.kind]\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata).\n   *\n   * @param {string} [options.label].\n   *        Label to identify the text track\n   *\n   * @param {string} [options.language]\n   *        Two letter language abbreviation.\n   *\n   * @return {HTMLTrackElement}\n   *         The track element that gets created.\n   */\n  ;\n\n  _proto.createRemoteTextTrack = function createRemoteTextTrack(options) {\n    var track = mergeOptions(options, {\n      tech: this\n    });\n    return new REMOTE.remoteTextEl.TrackClass(track);\n  }\n  /**\n   * Creates a remote text track object and returns an html track element.\n   *\n   * > Note: This can be an emulated {@link HTMLTrackElement} or a native one.\n   *\n   * @param {Object} options\n   *        See {@link Tech#createRemoteTextTrack} for more detailed properties.\n   *\n   * @param {boolean} [manualCleanup=true]\n   *        - When false: the TextTrack will be automatically removed from the video\n   *          element whenever the source changes\n   *        - When True: The TextTrack will have to be cleaned up manually\n   *\n   * @return {HTMLTrackElement}\n   *         An Html Track Element.\n   *\n   * @deprecated The default functionality for this function will be equivalent\n   *             to \"manualCleanup=false\" in the future. The manualCleanup parameter will\n   *             also be removed.\n   */\n  ;\n\n  _proto.addRemoteTextTrack = function addRemoteTextTrack(options, manualCleanup) {\n    var _this7 = this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    var htmlTrackElement = this.createRemoteTextTrack(options);\n\n    if (manualCleanup !== true && manualCleanup !== false) {\n      // deprecation warning\n      log.warn('Calling addRemoteTextTrack without explicitly setting the \"manualCleanup\" parameter to `true` is deprecated and default to `false` in future version of video.js');\n      manualCleanup = true;\n    } // store HTMLTrackElement and TextTrack to remote list\n\n\n    this.remoteTextTrackEls().addTrackElement_(htmlTrackElement);\n    this.remoteTextTracks().addTrack(htmlTrackElement.track);\n\n    if (manualCleanup !== true) {\n      // create the TextTrackList if it doesn't exist\n      this.ready(function () {\n        return _this7.autoRemoteTextTracks_.addTrack(htmlTrackElement.track);\n      });\n    }\n\n    return htmlTrackElement;\n  }\n  /**\n   * Remove a remote text track from the remote `TextTrackList`.\n   *\n   * @param {TextTrack} track\n   *        `TextTrack` to remove from the `TextTrackList`\n   */\n  ;\n\n  _proto.removeRemoteTextTrack = function removeRemoteTextTrack(track) {\n    var trackElement = this.remoteTextTrackEls().getTrackElementByTrack_(track); // remove HTMLTrackElement and TextTrack from remote list\n\n    this.remoteTextTrackEls().removeTrackElement_(trackElement);\n    this.remoteTextTracks().removeTrack(track);\n    this.autoRemoteTextTracks_.removeTrack(track);\n  }\n  /**\n   * Gets available media playback quality metrics as specified by the W3C's Media\n   * Playback Quality API.\n   *\n   * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n   *\n   * @return {Object}\n   *         An object with supported media playback quality metrics\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.getVideoPlaybackQuality = function getVideoPlaybackQuality() {\n    return {};\n  }\n  /**\n   * Attempt to create a floating video window always on top of other windows\n   * so that users may continue consuming media while they interact with other\n   * content sites, or applications on their device.\n   *\n   * @see [Spec]{@link https://wicg.github.io/picture-in-picture}\n   *\n   * @return {Promise|undefined}\n   *         A promise with a Picture-in-Picture window if the browser supports\n   *         Promises (or one was passed in as an option). It returns undefined\n   *         otherwise.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.requestPictureInPicture = function requestPictureInPicture() {\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (PromiseClass) {\n      return PromiseClass.reject();\n    }\n  }\n  /**\n   * A method to set a poster from a `Tech`.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.setPoster = function setPoster() {}\n  /**\n   * A method to check for the presence of the 'playsinline' <video> attribute.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.playsinline = function playsinline() {}\n  /**\n   * A method to set or unset the 'playsinline' <video> attribute.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.setPlaysinline = function setPlaysinline() {}\n  /**\n   * Attempt to force override of native audio tracks.\n   *\n   * @param {boolean} override - If set to true native audio will be overridden,\n   * otherwise native audio will potentially be used.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.overrideNativeAudioTracks = function overrideNativeAudioTracks() {}\n  /**\n   * Attempt to force override of native video tracks.\n   *\n   * @param {boolean} override - If set to true native video will be overridden,\n   * otherwise native video will potentially be used.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.overrideNativeVideoTracks = function overrideNativeVideoTracks() {}\n  /*\n   * Check if the tech can support the given mime-type.\n   *\n   * The base tech does not support any type, but source handlers might\n   * overwrite this.\n   *\n   * @param  {string} type\n   *         The mimetype to check for support\n   *\n   * @return {string}\n   *         'probably', 'maybe', or empty string\n   *\n   * @see [Spec]{@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/canPlayType}\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.canPlayType = function canPlayType() {\n    return '';\n  }\n  /**\n   * Check if the type is supported by this tech.\n   *\n   * The base tech does not support any type, but source handlers might\n   * overwrite this.\n   *\n   * @param {string} type\n   *        The media type to check\n   * @return {string} Returns the native video element's response\n   */\n  ;\n\n  Tech.canPlayType = function canPlayType() {\n    return '';\n  }\n  /**\n   * Check if the tech can support the given source\n   *\n   * @param {Object} srcObj\n   *        The source object\n   * @param {Object} options\n   *        The options passed to the tech\n   * @return {string} 'probably', 'maybe', or '' (empty string)\n   */\n  ;\n\n  Tech.canPlaySource = function canPlaySource(srcObj, options) {\n    return Tech.canPlayType(srcObj.type);\n  }\n  /*\n   * Return whether the argument is a Tech or not.\n   * Can be passed either a Class like `Html5` or a instance like `player.tech_`\n   *\n   * @param {Object} component\n   *        The item to check\n   *\n   * @return {boolean}\n   *         Whether it is a tech or not\n   *         - True if it is a tech\n   *         - False if it is not\n   */\n  ;\n\n  Tech.isTech = function isTech(component) {\n    return component.prototype instanceof Tech || component instanceof Tech || component === Tech;\n  }\n  /**\n   * Registers a `Tech` into a shared list for videojs.\n   *\n   * @param {string} name\n   *        Name of the `Tech` to register.\n   *\n   * @param {Object} tech\n   *        The `Tech` class to register.\n   */\n  ;\n\n  Tech.registerTech = function registerTech(name, tech) {\n    if (!Tech.techs_) {\n      Tech.techs_ = {};\n    }\n\n    if (!Tech.isTech(tech)) {\n      throw new Error(\"Tech \" + name + \" must be a Tech\");\n    }\n\n    if (!Tech.canPlayType) {\n      throw new Error('Techs must have a static canPlayType method on them');\n    }\n\n    if (!Tech.canPlaySource) {\n      throw new Error('Techs must have a static canPlaySource method on them');\n    }\n\n    name = toTitleCase(name);\n    Tech.techs_[name] = tech;\n    Tech.techs_[toLowerCase(name)] = tech;\n\n    if (name !== 'Tech') {\n      // camel case the techName for use in techOrder\n      Tech.defaultTechOrder_.push(name);\n    }\n\n    return tech;\n  }\n  /**\n   * Get a `Tech` from the shared list by name.\n   *\n   * @param {string} name\n   *        `camelCase` or `TitleCase` name of the Tech to get\n   *\n   * @return {Tech|undefined}\n   *         The `Tech` or undefined if there was no tech with the name requested.\n   */\n  ;\n\n  Tech.getTech = function getTech(name) {\n    if (!name) {\n      return;\n    }\n\n    if (Tech.techs_ && Tech.techs_[name]) {\n      return Tech.techs_[name];\n    }\n\n    name = toTitleCase(name);\n\n    if (window$1 && window$1.videojs && window$1.videojs[name]) {\n      log.warn(\"The \" + name + \" tech was added to the videojs object when it should be registered using videojs.registerTech(name, tech)\");\n      return window$1.videojs[name];\n    }\n  };\n\n  return Tech;\n}(Component);\n/**\n * Get the {@link VideoTrackList}\n *\n * @returns {VideoTrackList}\n * @method Tech.prototype.videoTracks\n */\n\n/**\n * Get the {@link AudioTrackList}\n *\n * @returns {AudioTrackList}\n * @method Tech.prototype.audioTracks\n */\n\n/**\n * Get the {@link TextTrackList}\n *\n * @returns {TextTrackList}\n * @method Tech.prototype.textTracks\n */\n\n/**\n * Get the remote element {@link TextTrackList}\n *\n * @returns {TextTrackList}\n * @method Tech.prototype.remoteTextTracks\n */\n\n/**\n * Get the remote element {@link HtmlTrackElementList}\n *\n * @returns {HtmlTrackElementList}\n * @method Tech.prototype.remoteTextTrackEls\n */\n\n\nALL.names.forEach(function (name) {\n  var props = ALL[name];\n\n  Tech.prototype[props.getterName] = function () {\n    this[props.privateName] = this[props.privateName] || new props.ListClass();\n    return this[props.privateName];\n  };\n});\n/**\n * List of associated text tracks\n *\n * @type {TextTrackList}\n * @private\n * @property Tech#textTracks_\n */\n\n/**\n * List of associated audio tracks.\n *\n * @type {AudioTrackList}\n * @private\n * @property Tech#audioTracks_\n */\n\n/**\n * List of associated video tracks.\n *\n * @type {VideoTrackList}\n * @private\n * @property Tech#videoTracks_\n */\n\n/**\n * Boolean indicating whether the `Tech` supports volume control.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresVolumeControl = true;\n/**\n * Boolean indicating whether the `Tech` supports muting volume.\n *\n * @type {bolean}\n * @default\n */\n\nTech.prototype.featuresMuteControl = true;\n/**\n * Boolean indicating whether the `Tech` supports fullscreen resize control.\n * Resizing plugins using request fullscreen reloads the plugin\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresFullscreenResize = false;\n/**\n * Boolean indicating whether the `Tech` supports changing the speed at which the video\n * plays. Examples:\n *   - Set player to play 2x (twice) as fast\n *   - Set player to play 0.5x (half) as fast\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresPlaybackRate = false;\n/**\n * Boolean indicating whether the `Tech` supports the `progress` event. This is currently\n * not triggered by video-js-swf. This will be used to determine if\n * {@link Tech#manualProgressOn} should be called.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresProgressEvents = false;\n/**\n * Boolean indicating whether the `Tech` supports the `sourceset` event.\n *\n * A tech should set this to `true` and then use {@link Tech#triggerSourceset}\n * to trigger a {@link Tech#event:sourceset} at the earliest time after getting\n * a new source.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresSourceset = false;\n/**\n * Boolean indicating whether the `Tech` supports the `timeupdate` event. This is currently\n * not triggered by video-js-swf. This will be used to determine if\n * {@link Tech#manualTimeUpdates} should be called.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresTimeupdateEvents = false;\n/**\n * Boolean indicating whether the `Tech` supports the native `TextTrack`s.\n * This will help us integrate with native `TextTrack`s if the browser supports them.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresNativeTextTracks = false;\n/**\n * A functional mixin for techs that want to use the Source Handler pattern.\n * Source handlers are scripts for handling specific formats.\n * The source handler pattern is used for adaptive formats (HLS, DASH) that\n * manually load video data and feed it into a Source Buffer (Media Source Extensions)\n * Example: `Tech.withSourceHandlers.call(MyTech);`\n *\n * @param {Tech} _Tech\n *        The tech to add source handler functions to.\n *\n * @mixes Tech~SourceHandlerAdditions\n */\n\nTech.withSourceHandlers = function (_Tech) {\n  /**\n   * Register a source handler\n   *\n   * @param {Function} handler\n   *        The source handler class\n   *\n   * @param {number} [index]\n   *        Register it at the following index\n   */\n  _Tech.registerSourceHandler = function (handler, index) {\n    var handlers = _Tech.sourceHandlers;\n\n    if (!handlers) {\n      handlers = _Tech.sourceHandlers = [];\n    }\n\n    if (index === undefined) {\n      // add to the end of the list\n      index = handlers.length;\n    }\n\n    handlers.splice(index, 0, handler);\n  };\n  /**\n   * Check if the tech can support the given type. Also checks the\n   * Techs sourceHandlers.\n   *\n   * @param {string} type\n   *         The mimetype to check.\n   *\n   * @return {string}\n   *         'probably', 'maybe', or '' (empty string)\n   */\n\n\n  _Tech.canPlayType = function (type) {\n    var handlers = _Tech.sourceHandlers || [];\n    var can;\n\n    for (var i = 0; i < handlers.length; i++) {\n      can = handlers[i].canPlayType(type);\n\n      if (can) {\n        return can;\n      }\n    }\n\n    return '';\n  };\n  /**\n   * Returns the first source handler that supports the source.\n   *\n   * TODO: Answer question: should 'probably' be prioritized over 'maybe'\n   *\n   * @param {Tech~SourceObject} source\n   *        The source object\n   *\n   * @param {Object} options\n   *        The options passed to the tech\n   *\n   * @return {SourceHandler|null}\n   *          The first source handler that supports the source or null if\n   *          no SourceHandler supports the source\n   */\n\n\n  _Tech.selectSourceHandler = function (source, options) {\n    var handlers = _Tech.sourceHandlers || [];\n    var can;\n\n    for (var i = 0; i < handlers.length; i++) {\n      can = handlers[i].canHandleSource(source, options);\n\n      if (can) {\n        return handlers[i];\n      }\n    }\n\n    return null;\n  };\n  /**\n   * Check if the tech can support the given source.\n   *\n   * @param {Tech~SourceObject} srcObj\n   *        The source object\n   *\n   * @param {Object} options\n   *        The options passed to the tech\n   *\n   * @return {string}\n   *         'probably', 'maybe', or '' (empty string)\n   */\n\n\n  _Tech.canPlaySource = function (srcObj, options) {\n    var sh = _Tech.selectSourceHandler(srcObj, options);\n\n    if (sh) {\n      return sh.canHandleSource(srcObj, options);\n    }\n\n    return '';\n  };\n  /**\n   * When using a source handler, prefer its implementation of\n   * any function normally provided by the tech.\n   */\n\n\n  var deferrable = ['seekable', 'seeking', 'duration'];\n  /**\n   * A wrapper around {@link Tech#seekable} that will call a `SourceHandler`s seekable\n   * function if it exists, with a fallback to the Techs seekable function.\n   *\n   * @method _Tech.seekable\n   */\n\n  /**\n   * A wrapper around {@link Tech#duration} that will call a `SourceHandler`s duration\n   * function if it exists, otherwise it will fallback to the techs duration function.\n   *\n   * @method _Tech.duration\n   */\n\n  deferrable.forEach(function (fnName) {\n    var originalFn = this[fnName];\n\n    if (typeof originalFn !== 'function') {\n      return;\n    }\n\n    this[fnName] = function () {\n      if (this.sourceHandler_ && this.sourceHandler_[fnName]) {\n        return this.sourceHandler_[fnName].apply(this.sourceHandler_, arguments);\n      }\n\n      return originalFn.apply(this, arguments);\n    };\n  }, _Tech.prototype);\n  /**\n   * Create a function for setting the source using a source object\n   * and source handlers.\n   * Should never be called unless a source handler was found.\n   *\n   * @param {Tech~SourceObject} source\n   *        A source object with src and type keys\n   */\n\n  _Tech.prototype.setSource = function (source) {\n    var sh = _Tech.selectSourceHandler(source, this.options_);\n\n    if (!sh) {\n      // Fall back to a native source hander when unsupported sources are\n      // deliberately set\n      if (_Tech.nativeSourceHandler) {\n        sh = _Tech.nativeSourceHandler;\n      } else {\n        log.error('No source handler found for the current source.');\n      }\n    } // Dispose any existing source handler\n\n\n    this.disposeSourceHandler();\n    this.off('dispose', this.disposeSourceHandler);\n\n    if (sh !== _Tech.nativeSourceHandler) {\n      this.currentSource_ = source;\n    }\n\n    this.sourceHandler_ = sh.handleSource(source, this, this.options_);\n    this.one('dispose', this.disposeSourceHandler);\n  };\n  /**\n   * Clean up any existing SourceHandlers and listeners when the Tech is disposed.\n   *\n   * @listens Tech#dispose\n   */\n\n\n  _Tech.prototype.disposeSourceHandler = function () {\n    // if we have a source and get another one\n    // then we are loading something new\n    // than clear all of our current tracks\n    if (this.currentSource_) {\n      this.clearTracks(['audio', 'video']);\n      this.currentSource_ = null;\n    } // always clean up auto-text tracks\n\n\n    this.cleanupAutoTextTracks();\n\n    if (this.sourceHandler_) {\n      if (this.sourceHandler_.dispose) {\n        this.sourceHandler_.dispose();\n      }\n\n      this.sourceHandler_ = null;\n    }\n  };\n}; // The base Tech class needs to be registered as a Component. It is the only\n// Tech that can be registered as a Component.\n\n\nComponent.registerComponent('Tech', Tech);\nTech.registerTech('Tech', Tech);\n/**\n * A list of techs that should be added to techOrder on Players\n *\n * @private\n */\n\nTech.defaultTechOrder_ = [];\n/**\n * @file middleware.js\n * @module middleware\n */\n\nvar middlewares = {};\nvar middlewareInstances = {};\nvar TERMINATOR = {};\n/**\n * A middleware object is a plain JavaScript object that has methods that\n * match the {@link Tech} methods found in the lists of allowed\n * {@link module:middleware.allowedGetters|getters},\n * {@link module:middleware.allowedSetters|setters}, and\n * {@link module:middleware.allowedMediators|mediators}.\n *\n * @typedef {Object} MiddlewareObject\n */\n\n/**\n * A middleware factory function that should return a\n * {@link module:middleware~MiddlewareObject|MiddlewareObject}.\n *\n * This factory will be called for each player when needed, with the player\n * passed in as an argument.\n *\n * @callback MiddlewareFactory\n * @param {Player} player\n *        A Video.js player.\n */\n\n/**\n * Define a middleware that the player should use by way of a factory function\n * that returns a middleware object.\n *\n * @param  {string} type\n *         The MIME type to match or `\"*\"` for all MIME types.\n *\n * @param  {MiddlewareFactory} middleware\n *         A middleware factory function that will be executed for\n *         matching types.\n */\n\nfunction use(type, middleware) {\n  middlewares[type] = middlewares[type] || [];\n  middlewares[type].push(middleware);\n}\n/**\n * Asynchronously sets a source using middleware by recursing through any\n * matching middlewares and calling `setSource` on each, passing along the\n * previous returned value each time.\n *\n * @param  {Player} player\n *         A {@link Player} instance.\n *\n * @param  {Tech~SourceObject} src\n *         A source object.\n *\n * @param  {Function}\n *         The next middleware to run.\n */\n\n\nfunction setSource(player, src, next) {\n  player.setTimeout(function () {\n    return setSourceHelper(src, middlewares[src.type], next, player);\n  }, 1);\n}\n/**\n * When the tech is set, passes the tech to each middleware's `setTech` method.\n *\n * @param {Object[]} middleware\n *        An array of middleware instances.\n *\n * @param {Tech} tech\n *        A Video.js tech.\n */\n\n\nfunction setTech(middleware, tech) {\n  middleware.forEach(function (mw) {\n    return mw.setTech && mw.setTech(tech);\n  });\n}\n/**\n * Calls a getter on the tech first, through each middleware\n * from right to left to the player.\n *\n * @param  {Object[]} middleware\n *         An array of middleware instances.\n *\n * @param  {Tech} tech\n *         The current tech.\n *\n * @param  {string} method\n *         A method name.\n *\n * @return {Mixed}\n *         The final value from the tech after middleware has intercepted it.\n */\n\n\nfunction get(middleware, tech, method) {\n  return middleware.reduceRight(middlewareIterator(method), tech[method]());\n}\n/**\n * Takes the argument given to the player and calls the setter method on each\n * middleware from left to right to the tech.\n *\n * @param  {Object[]} middleware\n *         An array of middleware instances.\n *\n * @param  {Tech} tech\n *         The current tech.\n *\n * @param  {string} method\n *         A method name.\n *\n * @param  {Mixed} arg\n *         The value to set on the tech.\n *\n * @return {Mixed}\n *         The return value of the `method` of the `tech`.\n */\n\n\nfunction set(middleware, tech, method, arg) {\n  return tech[method](middleware.reduce(middlewareIterator(method), arg));\n}\n/**\n * Takes the argument given to the player and calls the `call` version of the\n * method on each middleware from left to right.\n *\n * Then, call the passed in method on the tech and return the result unchanged\n * back to the player, through middleware, this time from right to left.\n *\n * @param  {Object[]} middleware\n *         An array of middleware instances.\n *\n * @param  {Tech} tech\n *         The current tech.\n *\n * @param  {string} method\n *         A method name.\n *\n * @param  {Mixed} arg\n *         The value to set on the tech.\n *\n * @return {Mixed}\n *         The return value of the `method` of the `tech`, regardless of the\n *         return values of middlewares.\n */\n\n\nfunction mediate(middleware, tech, method, arg) {\n  if (arg === void 0) {\n    arg = null;\n  }\n\n  var callMethod = 'call' + toTitleCase(method);\n  var middlewareValue = middleware.reduce(middlewareIterator(callMethod), arg);\n  var terminated = middlewareValue === TERMINATOR; // deprecated. The `null` return value should instead return TERMINATOR to\n  // prevent confusion if a techs method actually returns null.\n\n  var returnValue = terminated ? null : tech[method](middlewareValue);\n  executeRight(middleware, method, returnValue, terminated);\n  return returnValue;\n}\n/**\n * Enumeration of allowed getters where the keys are method names.\n *\n * @type {Object}\n */\n\n\nvar allowedGetters = {\n  buffered: 1,\n  currentTime: 1,\n  duration: 1,\n  seekable: 1,\n  played: 1,\n  paused: 1,\n  volume: 1\n};\n/**\n * Enumeration of allowed setters where the keys are method names.\n *\n * @type {Object}\n */\n\nvar allowedSetters = {\n  setCurrentTime: 1,\n  setVolume: 1\n};\n/**\n * Enumeration of allowed mediators where the keys are method names.\n *\n * @type {Object}\n */\n\nvar allowedMediators = {\n  play: 1,\n  pause: 1\n};\n\nfunction middlewareIterator(method) {\n  return function (value, mw) {\n    // if the previous middleware terminated, pass along the termination\n    if (value === TERMINATOR) {\n      return TERMINATOR;\n    }\n\n    if (mw[method]) {\n      return mw[method](value);\n    }\n\n    return value;\n  };\n}\n\nfunction executeRight(mws, method, value, terminated) {\n  for (var i = mws.length - 1; i >= 0; i--) {\n    var mw = mws[i];\n\n    if (mw[method]) {\n      mw[method](terminated, value);\n    }\n  }\n}\n/**\n * Clear the middleware cache for a player.\n *\n * @param  {Player} player\n *         A {@link Player} instance.\n */\n\n\nfunction clearCacheForPlayer(player) {\n  middlewareInstances[player.id()] = null;\n}\n/**\n * {\n *  [playerId]: [[mwFactory, mwInstance], ...]\n * }\n *\n * @private\n */\n\n\nfunction getOrCreateFactory(player, mwFactory) {\n  var mws = middlewareInstances[player.id()];\n  var mw = null;\n\n  if (mws === undefined || mws === null) {\n    mw = mwFactory(player);\n    middlewareInstances[player.id()] = [[mwFactory, mw]];\n    return mw;\n  }\n\n  for (var i = 0; i < mws.length; i++) {\n    var _mws$i = mws[i],\n        mwf = _mws$i[0],\n        mwi = _mws$i[1];\n\n    if (mwf !== mwFactory) {\n      continue;\n    }\n\n    mw = mwi;\n  }\n\n  if (mw === null) {\n    mw = mwFactory(player);\n    mws.push([mwFactory, mw]);\n  }\n\n  return mw;\n}\n\nfunction setSourceHelper(src, middleware, next, player, acc, lastRun) {\n  if (src === void 0) {\n    src = {};\n  }\n\n  if (middleware === void 0) {\n    middleware = [];\n  }\n\n  if (acc === void 0) {\n    acc = [];\n  }\n\n  if (lastRun === void 0) {\n    lastRun = false;\n  }\n\n  var _middleware = middleware,\n      mwFactory = _middleware[0],\n      mwrest = _middleware.slice(1); // if mwFactory is a string, then we're at a fork in the road\n\n\n  if (typeof mwFactory === 'string') {\n    setSourceHelper(src, middlewares[mwFactory], next, player, acc, lastRun); // if we have an mwFactory, call it with the player to get the mw,\n    // then call the mw's setSource method\n  } else if (mwFactory) {\n    var mw = getOrCreateFactory(player, mwFactory); // if setSource isn't present, implicitly select this middleware\n\n    if (!mw.setSource) {\n      acc.push(mw);\n      return setSourceHelper(src, mwrest, next, player, acc, lastRun);\n    }\n\n    mw.setSource(assign({}, src), function (err, _src) {\n      // something happened, try the next middleware on the current level\n      // make sure to use the old src\n      if (err) {\n        return setSourceHelper(src, mwrest, next, player, acc, lastRun);\n      } // we've succeeded, now we need to go deeper\n\n\n      acc.push(mw); // if it's the same type, continue down the current chain\n      // otherwise, we want to go down the new chain\n\n      setSourceHelper(_src, src.type === _src.type ? mwrest : middlewares[_src.type], next, player, acc, lastRun);\n    });\n  } else if (mwrest.length) {\n    setSourceHelper(src, mwrest, next, player, acc, lastRun);\n  } else if (lastRun) {\n    next(src, acc);\n  } else {\n    setSourceHelper(src, middlewares['*'], next, player, acc, true);\n  }\n}\n/**\n * Mimetypes\n *\n * @see http://hul.harvard.edu/ois/////systems/wax/wax-public-help/mimetypes.htm\n * @typedef Mimetypes~Kind\n * @enum\n */\n\n\nvar MimetypesKind = {\n  opus: 'video/ogg',\n  ogv: 'video/ogg',\n  mp4: 'video/mp4',\n  mov: 'video/mp4',\n  m4v: 'video/mp4',\n  mkv: 'video/x-matroska',\n  m4a: 'audio/mp4',\n  mp3: 'audio/mpeg',\n  aac: 'audio/aac',\n  oga: 'audio/ogg',\n  m3u8: 'application/x-mpegURL',\n  jpg: 'image/jpeg',\n  jpeg: 'image/jpeg',\n  gif: 'image/gif',\n  png: 'image/png',\n  svg: 'image/svg+xml',\n  webp: 'image/webp'\n};\n/**\n * Get the mimetype of a given src url if possible\n *\n * @param {string} src\n *        The url to the src\n *\n * @return {string}\n *         return the mimetype if it was known or empty string otherwise\n */\n\nvar getMimetype = function getMimetype(src) {\n  if (src === void 0) {\n    src = '';\n  }\n\n  var ext = getFileExtension(src);\n  var mimetype = MimetypesKind[ext.toLowerCase()];\n  return mimetype || '';\n};\n/**\n * Find the mime type of a given source string if possible. Uses the player\n * source cache.\n *\n * @param {Player} player\n *        The player object\n *\n * @param {string} src\n *        The source string\n *\n * @return {string}\n *         The type that was found\n */\n\n\nvar findMimetype = function findMimetype(player, src) {\n  if (!src) {\n    return '';\n  } // 1. check for the type in the `source` cache\n\n\n  if (player.cache_.source.src === src && player.cache_.source.type) {\n    return player.cache_.source.type;\n  } // 2. see if we have this source in our `currentSources` cache\n\n\n  var matchingSources = player.cache_.sources.filter(function (s) {\n    return s.src === src;\n  });\n\n  if (matchingSources.length) {\n    return matchingSources[0].type;\n  } // 3. look for the src url in source elements and use the type there\n\n\n  var sources = player.$$('source');\n\n  for (var i = 0; i < sources.length; i++) {\n    var s = sources[i];\n\n    if (s.type && s.src && s.src === src) {\n      return s.type;\n    }\n  } // 4. finally fallback to our list of mime types based on src url extension\n\n\n  return getMimetype(src);\n};\n/**\n * @module filter-source\n */\n\n/**\n * Filter out single bad source objects or multiple source objects in an\n * array. Also flattens nested source object arrays into a 1 dimensional\n * array of source objects.\n *\n * @param {Tech~SourceObject|Tech~SourceObject[]} src\n *        The src object to filter\n *\n * @return {Tech~SourceObject[]}\n *         An array of sourceobjects containing only valid sources\n *\n * @private\n */\n\n\nvar filterSource = function filterSource(src) {\n  // traverse array\n  if (Array.isArray(src)) {\n    var newsrc = [];\n    src.forEach(function (srcobj) {\n      srcobj = filterSource(srcobj);\n\n      if (Array.isArray(srcobj)) {\n        newsrc = newsrc.concat(srcobj);\n      } else if (isObject(srcobj)) {\n        newsrc.push(srcobj);\n      }\n    });\n    src = newsrc;\n  } else if (typeof src === 'string' && src.trim()) {\n    // convert string into object\n    src = [fixSource({\n      src: src\n    })];\n  } else if (isObject(src) && typeof src.src === 'string' && src.src && src.src.trim()) {\n    // src is already valid\n    src = [fixSource(src)];\n  } else {\n    // invalid source, turn it into an empty array\n    src = [];\n  }\n\n  return src;\n};\n/**\n * Checks src mimetype, adding it when possible\n *\n * @param {Tech~SourceObject} src\n *        The src object to check\n * @return {Tech~SourceObject}\n *        src Object with known type\n */\n\n\nfunction fixSource(src) {\n  if (!src.type) {\n    var mimetype = getMimetype(src.src);\n\n    if (mimetype) {\n      src.type = mimetype;\n    }\n  }\n\n  return src;\n}\n/**\n * The `MediaLoader` is the `Component` that decides which playback technology to load\n * when a player is initialized.\n *\n * @extends Component\n */\n\n\nvar MediaLoader =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(MediaLoader, _Component);\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should attach to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function that is run when this component is ready.\n   */\n\n\n  function MediaLoader(player, options, ready) {\n    var _this; // MediaLoader has no element\n\n\n    var options_ = mergeOptions({\n      createEl: false\n    }, options);\n    _this = _Component.call(this, player, options_, ready) || this; // If there are no sources when the player is initialized,\n    // load the first supported playback technology.\n\n    if (!options.playerOptions.sources || options.playerOptions.sources.length === 0) {\n      for (var i = 0, j = options.playerOptions.techOrder; i < j.length; i++) {\n        var techName = toTitleCase(j[i]);\n        var tech = Tech.getTech(techName); // Support old behavior of techs being registered as components.\n        // Remove once that deprecated behavior is removed.\n\n        if (!techName) {\n          tech = Component.getComponent(techName);\n        } // Check if the browser supports this technology\n\n\n        if (tech && tech.isSupported()) {\n          player.loadTech_(techName);\n          break;\n        }\n      }\n    } else {\n      // Loop through playback technologies (HTML5, Flash) and check for support.\n      // Then load the best source.\n      // A few assumptions here:\n      //   All playback technologies respect preload false.\n      player.src(options.playerOptions.sources);\n    }\n\n    return _this;\n  }\n\n  return MediaLoader;\n}(Component);\n\nComponent.registerComponent('MediaLoader', MediaLoader);\n/**\n * Component which is clickable or keyboard actionable, but is not a\n * native HTML button.\n *\n * @extends Component\n */\n\nvar ClickableComponent =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(ClickableComponent, _Component);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param  {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param  {Object} [options]\n   *         The key/value store of player options.\n   */\n\n\n  function ClickableComponent(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    _this.emitTapEvents();\n\n    _this.enable();\n\n    return _this;\n  }\n  /**\n   * Create the `ClickableComponent`s DOM element.\n   *\n   * @param {string} [tag=div]\n   *        The element's node type.\n   *\n   * @param {Object} [props={}]\n   *        An object of properties that should be set on the element.\n   *\n   * @param {Object} [attributes={}]\n   *        An object of attributes that should be set on the element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  var _proto = ClickableComponent.prototype;\n\n  _proto.createEl = function createEl(tag, props, attributes) {\n    if (tag === void 0) {\n      tag = 'div';\n    }\n\n    if (props === void 0) {\n      props = {};\n    }\n\n    if (attributes === void 0) {\n      attributes = {};\n    }\n\n    props = assign({\n      innerHTML: '<span aria-hidden=\"true\" class=\"vjs-icon-placeholder\"></span>',\n      className: this.buildCSSClass(),\n      tabIndex: 0\n    }, props);\n\n    if (tag === 'button') {\n      log.error(\"Creating a ClickableComponent with an HTML element of \" + tag + \" is not supported; use a Button instead.\");\n    } // Add ARIA attributes for clickable element which is not a native HTML button\n\n\n    attributes = assign({\n      role: 'button'\n    }, attributes);\n    this.tabIndex_ = props.tabIndex;\n\n    var el = _Component.prototype.createEl.call(this, tag, props, attributes);\n\n    this.createControlTextEl(el);\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    // remove controlTextEl_ on dispose\n    this.controlTextEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Create a control text element on this `ClickableComponent`\n   *\n   * @param {Element} [el]\n   *        Parent element for the control text.\n   *\n   * @return {Element}\n   *         The control text element that gets created.\n   */\n  ;\n\n  _proto.createControlTextEl = function createControlTextEl(el) {\n    this.controlTextEl_ = createEl('span', {\n      className: 'vjs-control-text'\n    }, {\n      // let the screen reader user know that the text of the element may change\n      'aria-live': 'polite'\n    });\n\n    if (el) {\n      el.appendChild(this.controlTextEl_);\n    }\n\n    this.controlText(this.controlText_, el);\n    return this.controlTextEl_;\n  }\n  /**\n   * Get or set the localize text to use for the controls on the `ClickableComponent`.\n   *\n   * @param {string} [text]\n   *        Control text for element.\n   *\n   * @param {Element} [el=this.el()]\n   *        Element to set the title on.\n   *\n   * @return {string}\n   *         - The control text when getting\n   */\n  ;\n\n  _proto.controlText = function controlText(text, el) {\n    if (el === void 0) {\n      el = this.el();\n    }\n\n    if (text === undefined) {\n      return this.controlText_ || 'Need Text';\n    }\n\n    var localizedText = this.localize(text);\n    this.controlText_ = text;\n    textContent(this.controlTextEl_, localizedText);\n\n    if (!this.nonIconControl) {\n      // Set title attribute if only an icon is shown\n      el.setAttribute('title', localizedText);\n    }\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-control vjs-button \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Enable this `ClickableComponent`\n   */\n  ;\n\n  _proto.enable = function enable() {\n    if (!this.enabled_) {\n      this.enabled_ = true;\n      this.removeClass('vjs-disabled');\n      this.el_.setAttribute('aria-disabled', 'false');\n\n      if (typeof this.tabIndex_ !== 'undefined') {\n        this.el_.setAttribute('tabIndex', this.tabIndex_);\n      }\n\n      this.on(['tap', 'click'], this.handleClick);\n      this.on('keydown', this.handleKeyDown);\n    }\n  }\n  /**\n   * Disable this `ClickableComponent`\n   */\n  ;\n\n  _proto.disable = function disable() {\n    this.enabled_ = false;\n    this.addClass('vjs-disabled');\n    this.el_.setAttribute('aria-disabled', 'true');\n\n    if (typeof this.tabIndex_ !== 'undefined') {\n      this.el_.removeAttribute('tabIndex');\n    }\n\n    this.off('mouseover', this.handleMouseOver);\n    this.off('mouseout', this.handleMouseOut);\n    this.off(['tap', 'click'], this.handleClick);\n    this.off('keydown', this.handleKeyDown);\n  }\n  /**\n   * Event handler that is called when a `ClickableComponent` receives a\n   * `click` or `tap` event.\n   *\n   * @param {EventTarget~Event} event\n   *        The `tap` or `click` event that caused this function to be called.\n   *\n   * @listens tap\n   * @listens click\n   * @abstract\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {}\n  /**\n   * Event handler that is called when a `ClickableComponent` receives a\n   * `keydown` event.\n   *\n   * By default, if the key is Space or Enter, it will trigger a `click` event.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Support Space or Enter key operation to fire a click event. Also,\n    // prevent the event from propagating through the DOM and triggering\n    // Player hotkeys.\n    if (keycode.isEventKey(event, 'Space') || keycode.isEventKey(event, 'Enter')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.trigger('click');\n    } else {\n      // Pass keypress handling up for unsupported keys\n      _Component.prototype.handleKeyDown.call(this, event);\n    }\n  };\n\n  return ClickableComponent;\n}(Component);\n\nComponent.registerComponent('ClickableComponent', ClickableComponent);\n/**\n * A `ClickableComponent` that handles showing the poster image for the player.\n *\n * @extends ClickableComponent\n */\n\nvar PosterImage =\n/*#__PURE__*/\nfunction (_ClickableComponent) {\n  _inheritsLoose(PosterImage, _ClickableComponent);\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should attach to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function PosterImage(player, options) {\n    var _this;\n\n    _this = _ClickableComponent.call(this, player, options) || this;\n\n    _this.update();\n\n    player.on('posterchange', bind(_assertThisInitialized(_this), _this.update));\n    return _this;\n  }\n  /**\n   * Clean up and dispose of the `PosterImage`.\n   */\n\n\n  var _proto = PosterImage.prototype;\n\n  _proto.dispose = function dispose() {\n    this.player().off('posterchange', this.update);\n\n    _ClickableComponent.prototype.dispose.call(this);\n  }\n  /**\n   * Create the `PosterImage`s DOM element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl$1() {\n    var el = createEl('div', {\n      className: 'vjs-poster',\n      // Don't want poster to be tabbable.\n      tabIndex: -1\n    });\n    return el;\n  }\n  /**\n   * An {@link EventTarget~EventListener} for {@link Player#posterchange} events.\n   *\n   * @listens Player#posterchange\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `Player#posterchange` event that triggered this function.\n   */\n  ;\n\n  _proto.update = function update(event) {\n    var url = this.player().poster();\n    this.setSrc(url); // If there's no poster source we should display:none on this component\n    // so it's not still clickable or right-clickable\n\n    if (url) {\n      this.show();\n    } else {\n      this.hide();\n    }\n  }\n  /**\n   * Set the source of the `PosterImage` depending on the display method.\n   *\n   * @param {string} url\n   *        The URL to the source for the `PosterImage`.\n   */\n  ;\n\n  _proto.setSrc = function setSrc(url) {\n    var backgroundImage = ''; // Any falsy value should stay as an empty string, otherwise\n    // this will throw an extra error\n\n    if (url) {\n      backgroundImage = \"url(\\\"\" + url + \"\\\")\";\n    }\n\n    this.el_.style.backgroundImage = backgroundImage;\n  }\n  /**\n   * An {@link EventTarget~EventListener} for clicks on the `PosterImage`. See\n   * {@link ClickableComponent#handleClick} for instances where this will be triggered.\n   *\n   * @listens tap\n   * @listens click\n   * @listens keydown\n   *\n   * @param {EventTarget~Event} event\n   +        The `click`, `tap` or `keydown` event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    // We don't want a click to trigger playback when controls are disabled\n    if (!this.player_.controls()) {\n      return;\n    }\n\n    if (this.player_.tech(true)) {\n      this.player_.tech(true).focus();\n    }\n\n    if (this.player_.paused()) {\n      silencePromise(this.player_.play());\n    } else {\n      this.player_.pause();\n    }\n  };\n\n  return PosterImage;\n}(ClickableComponent);\n\nComponent.registerComponent('PosterImage', PosterImage);\nvar darkGray = '#222';\nvar lightGray = '#ccc';\nvar fontMap = {\n  monospace: 'monospace',\n  sansSerif: 'sans-serif',\n  serif: 'serif',\n  monospaceSansSerif: '\"Andale Mono\", \"Lucida Console\", monospace',\n  monospaceSerif: '\"Courier New\", monospace',\n  proportionalSansSerif: 'sans-serif',\n  proportionalSerif: 'serif',\n  casual: '\"Comic Sans MS\", Impact, fantasy',\n  script: '\"Monotype Corsiva\", cursive',\n  smallcaps: '\"Andale Mono\", \"Lucida Console\", monospace, sans-serif'\n};\n/**\n * Construct an rgba color from a given hex color code.\n *\n * @param {number} color\n *        Hex number for color, like #f0e or #f604e2.\n *\n * @param {number} opacity\n *        Value for opacity, 0.0 - 1.0.\n *\n * @return {string}\n *         The rgba color that was created, like 'rgba(255, 0, 0, 0.3)'.\n */\n\nfunction constructColor(color, opacity) {\n  var hex;\n\n  if (color.length === 4) {\n    // color looks like \"#f0e\"\n    hex = color[1] + color[1] + color[2] + color[2] + color[3] + color[3];\n  } else if (color.length === 7) {\n    // color looks like \"#f604e2\"\n    hex = color.slice(1);\n  } else {\n    throw new Error('Invalid color code provided, ' + color + '; must be formatted as e.g. #f0e or #f604e2.');\n  }\n\n  return 'rgba(' + parseInt(hex.slice(0, 2), 16) + ',' + parseInt(hex.slice(2, 4), 16) + ',' + parseInt(hex.slice(4, 6), 16) + ',' + opacity + ')';\n}\n/**\n * Try to update the style of a DOM element. Some style changes will throw an error,\n * particularly in IE8. Those should be noops.\n *\n * @param {Element} el\n *        The DOM element to be styled.\n *\n * @param {string} style\n *        The CSS property on the element that should be styled.\n *\n * @param {string} rule\n *        The style rule that should be applied to the property.\n *\n * @private\n */\n\n\nfunction tryUpdateStyle(el, style, rule) {\n  try {\n    el.style[style] = rule;\n  } catch (e) {\n    // Satisfies linter.\n    return;\n  }\n}\n/**\n * The component for displaying text track cues.\n *\n * @extends Component\n */\n\n\nvar TextTrackDisplay =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(TextTrackDisplay, _Component);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when `TextTrackDisplay` is ready.\n   */\n\n\n  function TextTrackDisplay(player, options, ready) {\n    var _this;\n\n    _this = _Component.call(this, player, options, ready) || this;\n    var updateDisplayHandler = bind(_assertThisInitialized(_this), _this.updateDisplay);\n    player.on('loadstart', bind(_assertThisInitialized(_this), _this.toggleDisplay));\n    player.on('texttrackchange', updateDisplayHandler);\n    player.on('loadedmetadata', bind(_assertThisInitialized(_this), _this.preselectTrack)); // This used to be called during player init, but was causing an error\n    // if a track should show by default and the display hadn't loaded yet.\n    // Should probably be moved to an external track loader when we support\n    // tracks that don't need a display.\n\n    player.ready(bind(_assertThisInitialized(_this), function () {\n      if (player.tech_ && player.tech_.featuresNativeTextTracks) {\n        this.hide();\n        return;\n      }\n\n      player.on('fullscreenchange', updateDisplayHandler);\n      player.on('playerresize', updateDisplayHandler);\n      window$1.addEventListener('orientationchange', updateDisplayHandler);\n      player.on('dispose', function () {\n        return window$1.removeEventListener('orientationchange', updateDisplayHandler);\n      });\n      var tracks = this.options_.playerOptions.tracks || [];\n\n      for (var i = 0; i < tracks.length; i++) {\n        this.player_.addRemoteTextTrack(tracks[i], true);\n      }\n\n      this.preselectTrack();\n    }));\n    return _this;\n  }\n  /**\n  * Preselect a track following this precedence:\n  * - matches the previously selected {@link TextTrack}'s language and kind\n  * - matches the previously selected {@link TextTrack}'s language only\n  * - is the first default captions track\n  * - is the first default descriptions track\n  *\n  * @listens Player#loadstart\n  */\n\n\n  var _proto = TextTrackDisplay.prototype;\n\n  _proto.preselectTrack = function preselectTrack() {\n    var modes = {\n      captions: 1,\n      subtitles: 1\n    };\n    var trackList = this.player_.textTracks();\n    var userPref = this.player_.cache_.selectedLanguage;\n    var firstDesc;\n    var firstCaptions;\n    var preferredTrack;\n\n    for (var i = 0; i < trackList.length; i++) {\n      var track = trackList[i];\n\n      if (userPref && userPref.enabled && userPref.language && userPref.language === track.language && track.kind in modes) {\n        // Always choose the track that matches both language and kind\n        if (track.kind === userPref.kind) {\n          preferredTrack = track; // or choose the first track that matches language\n        } else if (!preferredTrack) {\n          preferredTrack = track;\n        } // clear everything if offTextTrackMenuItem was clicked\n\n      } else if (userPref && !userPref.enabled) {\n        preferredTrack = null;\n        firstDesc = null;\n        firstCaptions = null;\n      } else if (track[\"default\"]) {\n        if (track.kind === 'descriptions' && !firstDesc) {\n          firstDesc = track;\n        } else if (track.kind in modes && !firstCaptions) {\n          firstCaptions = track;\n        }\n      }\n    } // The preferredTrack matches the user preference and takes\n    // precedence over all the other tracks.\n    // So, display the preferredTrack before the first default track\n    // and the subtitles/captions track before the descriptions track\n\n\n    if (preferredTrack) {\n      preferredTrack.mode = 'showing';\n    } else if (firstCaptions) {\n      firstCaptions.mode = 'showing';\n    } else if (firstDesc) {\n      firstDesc.mode = 'showing';\n    }\n  }\n  /**\n   * Turn display of {@link TextTrack}'s from the current state into the other state.\n   * There are only two states:\n   * - 'shown'\n   * - 'hidden'\n   *\n   * @listens Player#loadstart\n   */\n  ;\n\n  _proto.toggleDisplay = function toggleDisplay() {\n    if (this.player_.tech_ && this.player_.tech_.featuresNativeTextTracks) {\n      this.hide();\n    } else {\n      this.show();\n    }\n  }\n  /**\n   * Create the {@link Component}'s DOM element.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-text-track-display'\n    }, {\n      'aria-live': 'off',\n      'aria-atomic': 'true'\n    });\n  }\n  /**\n   * Clear all displayed {@link TextTrack}s.\n   */\n  ;\n\n  _proto.clearDisplay = function clearDisplay() {\n    if (typeof window$1.WebVTT === 'function') {\n      window$1.WebVTT.processCues(window$1, [], this.el_);\n    }\n  }\n  /**\n   * Update the displayed TextTrack when a either a {@link Player#texttrackchange} or\n   * a {@link Player#fullscreenchange} is fired.\n   *\n   * @listens Player#texttrackchange\n   * @listens Player#fullscreenchange\n   */\n  ;\n\n  _proto.updateDisplay = function updateDisplay() {\n    var tracks = this.player_.textTracks();\n    var allowMultipleShowingTracks = this.options_.allowMultipleShowingTracks;\n    this.clearDisplay();\n\n    if (allowMultipleShowingTracks) {\n      var showingTracks = [];\n\n      for (var _i = 0; _i < tracks.length; ++_i) {\n        var track = tracks[_i];\n\n        if (track.mode !== 'showing') {\n          continue;\n        }\n\n        showingTracks.push(track);\n      }\n\n      this.updateForTrack(showingTracks);\n      return;\n    } //  Track display prioritization model: if multiple tracks are 'showing',\n    //  display the first 'subtitles' or 'captions' track which is 'showing',\n    //  otherwise display the first 'descriptions' track which is 'showing'\n\n\n    var descriptionsTrack = null;\n    var captionsSubtitlesTrack = null;\n    var i = tracks.length;\n\n    while (i--) {\n      var _track = tracks[i];\n\n      if (_track.mode === 'showing') {\n        if (_track.kind === 'descriptions') {\n          descriptionsTrack = _track;\n        } else {\n          captionsSubtitlesTrack = _track;\n        }\n      }\n    }\n\n    if (captionsSubtitlesTrack) {\n      if (this.getAttribute('aria-live') !== 'off') {\n        this.setAttribute('aria-live', 'off');\n      }\n\n      this.updateForTrack(captionsSubtitlesTrack);\n    } else if (descriptionsTrack) {\n      if (this.getAttribute('aria-live') !== 'assertive') {\n        this.setAttribute('aria-live', 'assertive');\n      }\n\n      this.updateForTrack(descriptionsTrack);\n    }\n  }\n  /**\n   * Style {@Link TextTrack} activeCues according to {@Link TextTrackSettings}.\n   *\n   * @param {TextTrack} track\n   *        Text track object containing active cues to style.\n   */\n  ;\n\n  _proto.updateDisplayState = function updateDisplayState(track) {\n    var overrides = this.player_.textTrackSettings.getValues();\n    var cues = track.activeCues;\n    var i = cues.length;\n\n    while (i--) {\n      var cue = cues[i];\n\n      if (!cue) {\n        continue;\n      }\n\n      var cueDiv = cue.displayState;\n\n      if (overrides.color) {\n        cueDiv.firstChild.style.color = overrides.color;\n      }\n\n      if (overrides.textOpacity) {\n        tryUpdateStyle(cueDiv.firstChild, 'color', constructColor(overrides.color || '#fff', overrides.textOpacity));\n      }\n\n      if (overrides.backgroundColor) {\n        cueDiv.firstChild.style.backgroundColor = overrides.backgroundColor;\n      }\n\n      if (overrides.backgroundOpacity) {\n        tryUpdateStyle(cueDiv.firstChild, 'backgroundColor', constructColor(overrides.backgroundColor || '#000', overrides.backgroundOpacity));\n      }\n\n      if (overrides.windowColor) {\n        if (overrides.windowOpacity) {\n          tryUpdateStyle(cueDiv, 'backgroundColor', constructColor(overrides.windowColor, overrides.windowOpacity));\n        } else {\n          cueDiv.style.backgroundColor = overrides.windowColor;\n        }\n      }\n\n      if (overrides.edgeStyle) {\n        if (overrides.edgeStyle === 'dropshadow') {\n          cueDiv.firstChild.style.textShadow = \"2px 2px 3px \" + darkGray + \", 2px 2px 4px \" + darkGray + \", 2px 2px 5px \" + darkGray;\n        } else if (overrides.edgeStyle === 'raised') {\n          cueDiv.firstChild.style.textShadow = \"1px 1px \" + darkGray + \", 2px 2px \" + darkGray + \", 3px 3px \" + darkGray;\n        } else if (overrides.edgeStyle === 'depressed') {\n          cueDiv.firstChild.style.textShadow = \"1px 1px \" + lightGray + \", 0 1px \" + lightGray + \", -1px -1px \" + darkGray + \", 0 -1px \" + darkGray;\n        } else if (overrides.edgeStyle === 'uniform') {\n          cueDiv.firstChild.style.textShadow = \"0 0 4px \" + darkGray + \", 0 0 4px \" + darkGray + \", 0 0 4px \" + darkGray + \", 0 0 4px \" + darkGray;\n        }\n      }\n\n      if (overrides.fontPercent && overrides.fontPercent !== 1) {\n        var fontSize = window$1.parseFloat(cueDiv.style.fontSize);\n        cueDiv.style.fontSize = fontSize * overrides.fontPercent + 'px';\n        cueDiv.style.height = 'auto';\n        cueDiv.style.top = 'auto';\n        cueDiv.style.bottom = '2px';\n      }\n\n      if (overrides.fontFamily && overrides.fontFamily !== 'default') {\n        if (overrides.fontFamily === 'small-caps') {\n          cueDiv.firstChild.style.fontVariant = 'small-caps';\n        } else {\n          cueDiv.firstChild.style.fontFamily = fontMap[overrides.fontFamily];\n        }\n      }\n    }\n  }\n  /**\n   * Add an {@link TextTrack} to to the {@link Tech}s {@link TextTrackList}.\n   *\n   * @param {TextTrack|TextTrack[]} tracks\n   *        Text track object or text track array to be added to the list.\n   */\n  ;\n\n  _proto.updateForTrack = function updateForTrack(tracks) {\n    if (!Array.isArray(tracks)) {\n      tracks = [tracks];\n    }\n\n    if (typeof window$1.WebVTT !== 'function' || tracks.every(function (track) {\n      return !track.activeCues;\n    })) {\n      return;\n    }\n\n    var cues = []; // push all active track cues\n\n    for (var i = 0; i < tracks.length; ++i) {\n      var track = tracks[i];\n\n      for (var j = 0; j < track.activeCues.length; ++j) {\n        cues.push(track.activeCues[j]);\n      }\n    } // removes all cues before it processes new ones\n\n\n    window$1.WebVTT.processCues(window$1, cues, this.el_); // add unique class to each language text track & add settings styling if necessary\n\n    for (var _i2 = 0; _i2 < tracks.length; ++_i2) {\n      var _track2 = tracks[_i2];\n\n      for (var _j = 0; _j < _track2.activeCues.length; ++_j) {\n        var cueEl = _track2.activeCues[_j].displayState;\n        addClass(cueEl, 'vjs-text-track-cue');\n        addClass(cueEl, 'vjs-text-track-cue-' + (_track2.language ? _track2.language : _i2));\n      }\n\n      if (this.player_.textTrackSettings) {\n        this.updateDisplayState(_track2);\n      }\n    }\n  };\n\n  return TextTrackDisplay;\n}(Component);\n\nComponent.registerComponent('TextTrackDisplay', TextTrackDisplay);\n/**\n * A loading spinner for use during waiting/loading events.\n *\n * @extends Component\n */\n\nvar LoadingSpinner =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(LoadingSpinner, _Component);\n\n  function LoadingSpinner() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = LoadingSpinner.prototype;\n  /**\n   * Create the `LoadingSpinner`s DOM element.\n   *\n   * @return {Element}\n   *         The dom element that gets created.\n   */\n\n  _proto.createEl = function createEl$1() {\n    var isAudio = this.player_.isAudio();\n    var playerType = this.localize(isAudio ? 'Audio Player' : 'Video Player');\n    var controlText = createEl('span', {\n      className: 'vjs-control-text',\n      innerHTML: this.localize('{1} is loading.', [playerType])\n    });\n\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-loading-spinner',\n      dir: 'ltr'\n    });\n\n    el.appendChild(controlText);\n    return el;\n  };\n\n  return LoadingSpinner;\n}(Component);\n\nComponent.registerComponent('LoadingSpinner', LoadingSpinner);\n/**\n * Base class for all buttons.\n *\n * @extends ClickableComponent\n */\n\nvar Button =\n/*#__PURE__*/\nfunction (_ClickableComponent) {\n  _inheritsLoose(Button, _ClickableComponent);\n\n  function Button() {\n    return _ClickableComponent.apply(this, arguments) || this;\n  }\n\n  var _proto = Button.prototype;\n  /**\n   * Create the `Button`s DOM element.\n   *\n   * @param {string} [tag=\"button\"]\n   *        The element's node type. This argument is IGNORED: no matter what\n   *        is passed, it will always create a `button` element.\n   *\n   * @param {Object} [props={}]\n   *        An object of properties that should be set on the element.\n   *\n   * @param {Object} [attributes={}]\n   *        An object of attributes that should be set on the element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n  _proto.createEl = function createEl(tag, props, attributes) {\n    if (props === void 0) {\n      props = {};\n    }\n\n    if (attributes === void 0) {\n      attributes = {};\n    }\n\n    tag = 'button';\n    props = assign({\n      innerHTML: '<span aria-hidden=\"true\" class=\"vjs-icon-placeholder\"></span>',\n      className: this.buildCSSClass()\n    }, props); // Add attributes for button element\n\n    attributes = assign({\n      // Necessary since the default button type is \"submit\"\n      type: 'button'\n    }, attributes);\n    var el = Component.prototype.createEl.call(this, tag, props, attributes);\n    this.createControlTextEl(el);\n    return el;\n  }\n  /**\n   * Add a child `Component` inside of this `Button`.\n   *\n   * @param {string|Component} child\n   *        The name or instance of a child to add.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of options that will get passed to children of\n   *        the child.\n   *\n   * @return {Component}\n   *         The `Component` that gets added as a child. When using a string the\n   *         `Component` will get created by this process.\n   *\n   * @deprecated since version 5\n   */\n  ;\n\n  _proto.addChild = function addChild(child, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    var className = this.constructor.name;\n    log.warn(\"Adding an actionable (user controllable) child to a Button (\" + className + \") is not supported; use a ClickableComponent instead.\"); // Avoid the error message generated by ClickableComponent's addChild method\n\n    return Component.prototype.addChild.call(this, child, options);\n  }\n  /**\n   * Enable the `Button` element so that it can be activated or clicked. Use this with\n   * {@link Button#disable}.\n   */\n  ;\n\n  _proto.enable = function enable() {\n    _ClickableComponent.prototype.enable.call(this);\n\n    this.el_.removeAttribute('disabled');\n  }\n  /**\n   * Disable the `Button` element so that it cannot be activated or clicked. Use this with\n   * {@link Button#enable}.\n   */\n  ;\n\n  _proto.disable = function disable() {\n    _ClickableComponent.prototype.disable.call(this);\n\n    this.el_.setAttribute('disabled', 'disabled');\n  }\n  /**\n   * This gets called when a `Button` has focus and `keydown` is triggered via a key\n   * press.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to get called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Ignore Space or Enter key operation, which is handled by the browser for\n    // a button - though not for its super class, ClickableComponent. Also,\n    // prevent the event from propagating through the DOM and triggering Player\n    // hotkeys. We do not preventDefault here because we _want_ the browser to\n    // handle it.\n    if (keycode.isEventKey(event, 'Space') || keycode.isEventKey(event, 'Enter')) {\n      event.stopPropagation();\n      return;\n    } // Pass keypress handling up for unsupported keys\n\n\n    _ClickableComponent.prototype.handleKeyDown.call(this, event);\n  };\n\n  return Button;\n}(ClickableComponent);\n\nComponent.registerComponent('Button', Button);\n/**\n * The initial play button that shows before the video has played. The hiding of the\n * `BigPlayButton` get done via CSS and `Player` states.\n *\n * @extends Button\n */\n\nvar BigPlayButton =\n/*#__PURE__*/\nfunction (_Button) {\n  _inheritsLoose(BigPlayButton, _Button);\n\n  function BigPlayButton(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n    _this.mouseused_ = false;\n\n    _this.on('mousedown', _this.handleMouseDown);\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object. Always returns 'vjs-big-play-button'.\n   */\n\n\n  var _proto = BigPlayButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return 'vjs-big-play-button';\n  }\n  /**\n   * This gets called when a `BigPlayButton` \"clicked\". See {@link ClickableComponent}\n   * for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    var playPromise = this.player_.play(); // exit early if clicked via the mouse\n\n    if (this.mouseused_ && event.clientX && event.clientY) {\n      silencePromise(playPromise);\n\n      if (this.player_.tech(true)) {\n        this.player_.tech(true).focus();\n      }\n\n      return;\n    }\n\n    var cb = this.player_.getChild('controlBar');\n    var playToggle = cb && cb.getChild('playToggle');\n\n    if (!playToggle) {\n      this.player_.tech(true).focus();\n      return;\n    }\n\n    var playFocus = function playFocus() {\n      return playToggle.focus();\n    };\n\n    if (isPromise(playPromise)) {\n      playPromise.then(playFocus, function () {});\n    } else {\n      this.setTimeout(playFocus, 1);\n    }\n  };\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    this.mouseused_ = false;\n\n    _Button.prototype.handleKeyDown.call(this, event);\n  };\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    this.mouseused_ = true;\n  };\n\n  return BigPlayButton;\n}(Button);\n/**\n * The text that should display over the `BigPlayButton`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n */\n\n\nBigPlayButton.prototype.controlText_ = 'Play Video';\nComponent.registerComponent('BigPlayButton', BigPlayButton);\n/**\n * The `CloseButton` is a `{@link Button}` that fires a `close` event when\n * it gets clicked.\n *\n * @extends Button\n */\n\nvar CloseButton =\n/*#__PURE__*/\nfunction (_Button) {\n  _inheritsLoose(CloseButton, _Button);\n  /**\n  * Creates an instance of the this class.\n  *\n  * @param  {Player} player\n  *         The `Player` that this class should be attached to.\n  *\n  * @param  {Object} [options]\n  *         The key/value store of player options.\n  */\n\n\n  function CloseButton(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n\n    _this.controlText(options && options.controlText || _this.localize('Close'));\n\n    return _this;\n  }\n  /**\n  * Builds the default DOM `className`.\n  *\n  * @return {string}\n  *         The DOM `className` for this object.\n  */\n\n\n  var _proto = CloseButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-close-button \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * This gets called when a `CloseButton` gets clicked. See\n   * {@link ClickableComponent#handleClick} for more information on when\n   * this will be triggered\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   * @fires CloseButton#close\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    /**\n     * Triggered when the a `CloseButton` is clicked.\n     *\n     * @event CloseButton#close\n     * @type {EventTarget~Event}\n     *\n     * @property {boolean} [bubbles=false]\n     *           set to false so that the close event does not\n     *           bubble up to parents if there is no listener\n     */\n    this.trigger({\n      type: 'close',\n      bubbles: false\n    });\n  }\n  /**\n   * Event handler that is called when a `CloseButton` receives a\n   * `keydown` event.\n   *\n   * By default, if the key is Esc, it will trigger a `click` event.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Esc button will trigger `click` event\n    if (keycode.isEventKey(event, 'Esc')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.trigger('click');\n    } else {\n      // Pass keypress handling up for unsupported keys\n      _Button.prototype.handleKeyDown.call(this, event);\n    }\n  };\n\n  return CloseButton;\n}(Button);\n\nComponent.registerComponent('CloseButton', CloseButton);\n/**\n * Button to toggle between play and pause.\n *\n * @extends Button\n */\n\nvar PlayToggle =\n/*#__PURE__*/\nfunction (_Button) {\n  _inheritsLoose(PlayToggle, _Button);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n\n\n  function PlayToggle(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _Button.call(this, player, options) || this; // show or hide replay icon\n\n    options.replay = options.replay === undefined || options.replay;\n\n    _this.on(player, 'play', _this.handlePlay);\n\n    _this.on(player, 'pause', _this.handlePause);\n\n    if (options.replay) {\n      _this.on(player, 'ended', _this.handleEnded);\n    }\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = PlayToggle.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-play-control \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * This gets called when an `PlayToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    if (this.player_.paused()) {\n      this.player_.play();\n    } else {\n      this.player_.pause();\n    }\n  }\n  /**\n   * This gets called once after the video has ended and the user seeks so that\n   * we can change the replay button back to a play button.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#seeked\n   */\n  ;\n\n  _proto.handleSeeked = function handleSeeked(event) {\n    this.removeClass('vjs-ended');\n\n    if (this.player_.paused()) {\n      this.handlePause(event);\n    } else {\n      this.handlePlay(event);\n    }\n  }\n  /**\n   * Add the vjs-playing class to the element so it can change appearance.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#play\n   */\n  ;\n\n  _proto.handlePlay = function handlePlay(event) {\n    this.removeClass('vjs-ended');\n    this.removeClass('vjs-paused');\n    this.addClass('vjs-playing'); // change the button text to \"Pause\"\n\n    this.controlText('Pause');\n  }\n  /**\n   * Add the vjs-paused class to the element so it can change appearance.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#pause\n   */\n  ;\n\n  _proto.handlePause = function handlePause(event) {\n    this.removeClass('vjs-playing');\n    this.addClass('vjs-paused'); // change the button text to \"Play\"\n\n    this.controlText('Play');\n  }\n  /**\n   * Add the vjs-ended class to the element so it can change appearance\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#ended\n   */\n  ;\n\n  _proto.handleEnded = function handleEnded(event) {\n    this.removeClass('vjs-playing');\n    this.addClass('vjs-ended'); // change the button text to \"Replay\"\n\n    this.controlText('Replay'); // on the next seek remove the replay button\n\n    this.one(this.player_, 'seeked', this.handleSeeked);\n  };\n\n  return PlayToggle;\n}(Button);\n/**\n * The text that should display over the `PlayToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPlayToggle.prototype.controlText_ = 'Play';\nComponent.registerComponent('PlayToggle', PlayToggle);\n/**\n * @file format-time.js\n * @module format-time\n */\n\n/**\n * Format seconds as a time string, H:MM:SS or M:SS. Supplying a guide (in\n * seconds) will force a number of leading zeros to cover the length of the\n * guide.\n *\n * @private\n * @param  {number} seconds\n *         Number of seconds to be turned into a string\n *\n * @param  {number} guide\n *         Number (in seconds) to model the string after\n *\n * @return {string}\n *         Time formatted as H:MM:SS or M:SS\n */\n\nvar defaultImplementation = function defaultImplementation(seconds, guide) {\n  seconds = seconds < 0 ? 0 : seconds;\n  var s = Math.floor(seconds % 60);\n  var m = Math.floor(seconds / 60 % 60);\n  var h = Math.floor(seconds / 3600);\n  var gm = Math.floor(guide / 60 % 60);\n  var gh = Math.floor(guide / 3600); // handle invalid times\n\n  if (isNaN(seconds) || seconds === Infinity) {\n    // '-' is false for all relational operators (e.g. <, >=) so this setting\n    // will add the minimum number of fields specified by the guide\n    h = m = s = '-';\n  } // Check if we need to show hours\n\n\n  h = h > 0 || gh > 0 ? h + ':' : ''; // If hours are showing, we may need to add a leading zero.\n  // Always show at least one digit of minutes.\n\n  m = ((h || gm >= 10) && m < 10 ? '0' + m : m) + ':'; // Check if leading zero is need for seconds\n\n  s = s < 10 ? '0' + s : s;\n  return h + m + s;\n}; // Internal pointer to the current implementation.\n\n\nvar implementation = defaultImplementation;\n/**\n * Replaces the default formatTime implementation with a custom implementation.\n *\n * @param {Function} customImplementation\n *        A function which will be used in place of the default formatTime\n *        implementation. Will receive the current time in seconds and the\n *        guide (in seconds) as arguments.\n */\n\nfunction setFormatTime(customImplementation) {\n  implementation = customImplementation;\n}\n/**\n * Resets formatTime to the default implementation.\n */\n\n\nfunction resetFormatTime() {\n  implementation = defaultImplementation;\n}\n/**\n * Delegates to either the default time formatting function or a custom\n * function supplied via `setFormatTime`.\n *\n * Formats seconds as a time string (H:MM:SS or M:SS). Supplying a\n * guide (in seconds) will force a number of leading zeros to cover the\n * length of the guide.\n *\n * @static\n * @example  formatTime(125, 600) === \"02:05\"\n * @param    {number} seconds\n *           Number of seconds to be turned into a string\n *\n * @param    {number} guide\n *           Number (in seconds) to model the string after\n *\n * @return   {string}\n *           Time formatted as H:MM:SS or M:SS\n */\n\n\nfunction formatTime(seconds, guide) {\n  if (guide === void 0) {\n    guide = seconds;\n  }\n\n  return implementation(seconds, guide);\n}\n/**\n * Displays time information about the video\n *\n * @extends Component\n */\n\n\nvar TimeDisplay =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(TimeDisplay, _Component);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function TimeDisplay(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.throttledUpdateContent = throttle(bind(_assertThisInitialized(_this), _this.updateContent), UPDATE_REFRESH_INTERVAL);\n\n    _this.on(player, 'timeupdate', _this.throttledUpdateContent);\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = TimeDisplay.prototype;\n\n  _proto.createEl = function createEl$1() {\n    var className = this.buildCSSClass();\n\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: className + \" vjs-time-control vjs-control\",\n      innerHTML: \"<span class=\\\"vjs-control-text\\\" role=\\\"presentation\\\">\" + this.localize(this.labelText_) + \"\\xA0</span>\"\n    });\n\n    this.contentEl_ = createEl('span', {\n      className: className + \"-display\"\n    }, {\n      // tell screen readers not to automatically read the time as it changes\n      'aria-live': 'off',\n      // span elements have no implicit role, but some screen readers (notably VoiceOver)\n      // treat them as a break between items in the DOM when using arrow keys\n      // (or left-to-right swipes on iOS) to read contents of a page. Using\n      // role='presentation' causes VoiceOver to NOT treat this span as a break.\n      'role': 'presentation'\n    });\n    this.updateTextNode_();\n    el.appendChild(this.contentEl_);\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    this.contentEl_ = null;\n    this.textNode_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Updates the \"remaining time\" text node with new content using the\n   * contents of the `formattedTime_` property.\n   *\n   * @private\n   */\n  ;\n\n  _proto.updateTextNode_ = function updateTextNode_() {\n    if (!this.contentEl_) {\n      return;\n    }\n\n    while (this.contentEl_.firstChild) {\n      this.contentEl_.removeChild(this.contentEl_.firstChild);\n    }\n\n    this.textNode_ = document.createTextNode(this.formattedTime_ || this.formatTime_(0));\n    this.contentEl_.appendChild(this.textNode_);\n  }\n  /**\n   * Generates a formatted time for this component to use in display.\n   *\n   * @param  {number} time\n   *         A numeric time, in seconds.\n   *\n   * @return {string}\n   *         A formatted time\n   *\n   * @private\n   */\n  ;\n\n  _proto.formatTime_ = function formatTime_(time) {\n    return formatTime(time);\n  }\n  /**\n   * Updates the time display text node if it has what was passed in changed\n   * the formatted time.\n   *\n   * @param {number} time\n   *        The time to update to\n   *\n   * @private\n   */\n  ;\n\n  _proto.updateFormattedTime_ = function updateFormattedTime_(time) {\n    var formattedTime = this.formatTime_(time);\n\n    if (formattedTime === this.formattedTime_) {\n      return;\n    }\n\n    this.formattedTime_ = formattedTime;\n    this.requestAnimationFrame(this.updateTextNode_);\n  }\n  /**\n   * To be filled out in the child class, should update the displayed time\n   * in accordance with the fact that the current time has changed.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate`  event that caused this to run.\n   *\n   * @listens Player#timeupdate\n   */\n  ;\n\n  _proto.updateContent = function updateContent(event) {};\n\n  return TimeDisplay;\n}(Component);\n/**\n * The text that is added to the `TimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nTimeDisplay.prototype.labelText_ = 'Time';\n/**\n * The text that should display over the `TimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n\nTimeDisplay.prototype.controlText_ = 'Time';\nComponent.registerComponent('TimeDisplay', TimeDisplay);\n/**\n * Displays the current time\n *\n * @extends Component\n */\n\nvar CurrentTimeDisplay =\n/*#__PURE__*/\nfunction (_TimeDisplay) {\n  _inheritsLoose(CurrentTimeDisplay, _TimeDisplay);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function CurrentTimeDisplay(player, options) {\n    var _this;\n\n    _this = _TimeDisplay.call(this, player, options) || this;\n\n    _this.on(player, 'ended', _this.handleEnded);\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = CurrentTimeDisplay.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return 'vjs-current-time';\n  }\n  /**\n   * Update current time display\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` event that caused this function to run.\n   *\n   * @listens Player#timeupdate\n   */\n  ;\n\n  _proto.updateContent = function updateContent(event) {\n    // Allows for smooth scrubbing, when player can't keep up.\n    var time = this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();\n    this.updateFormattedTime_(time);\n  }\n  /**\n   * When the player fires ended there should be no time left. Sadly\n   * this is not always the case, lets make it seem like that is the case\n   * for users.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `ended` event that caused this to run.\n   *\n   * @listens Player#ended\n   */\n  ;\n\n  _proto.handleEnded = function handleEnded(event) {\n    if (!this.player_.duration()) {\n      return;\n    }\n\n    this.updateFormattedTime_(this.player_.duration());\n  };\n\n  return CurrentTimeDisplay;\n}(TimeDisplay);\n/**\n * The text that is added to the `CurrentTimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nCurrentTimeDisplay.prototype.labelText_ = 'Current Time';\n/**\n * The text that should display over the `CurrentTimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n\nCurrentTimeDisplay.prototype.controlText_ = 'Current Time';\nComponent.registerComponent('CurrentTimeDisplay', CurrentTimeDisplay);\n/**\n * Displays the duration\n *\n * @extends Component\n */\n\nvar DurationDisplay =\n/*#__PURE__*/\nfunction (_TimeDisplay) {\n  _inheritsLoose(DurationDisplay, _TimeDisplay);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function DurationDisplay(player, options) {\n    var _this;\n\n    _this = _TimeDisplay.call(this, player, options) || this; // we do not want to/need to throttle duration changes,\n    // as they should always display the changed duration as\n    // it has changed\n\n    _this.on(player, 'durationchange', _this.updateContent); // Listen to loadstart because the player duration is reset when a new media element is loaded,\n    // but the durationchange on the user agent will not fire.\n    // @see [Spec]{@link https://www.w3.org/TR/2011/WD-html5-20110113/video.html#media-element-load-algorithm}\n\n\n    _this.on(player, 'loadstart', _this.updateContent); // Also listen for timeupdate (in the parent) and loadedmetadata because removing those\n    // listeners could have broken dependent applications/libraries. These\n    // can likely be removed for 7.0.\n\n\n    _this.on(player, 'loadedmetadata', _this.throttledUpdateContent);\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = DurationDisplay.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return 'vjs-duration';\n  }\n  /**\n   * Update duration time display.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `durationchange`, `timeupdate`, or `loadedmetadata` event that caused\n   *        this function to be called.\n   *\n   * @listens Player#durationchange\n   * @listens Player#timeupdate\n   * @listens Player#loadedmetadata\n   */\n  ;\n\n  _proto.updateContent = function updateContent(event) {\n    var duration = this.player_.duration();\n\n    if (this.duration_ !== duration) {\n      this.duration_ = duration;\n      this.updateFormattedTime_(duration);\n    }\n  };\n\n  return DurationDisplay;\n}(TimeDisplay);\n/**\n * The text that is added to the `DurationDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nDurationDisplay.prototype.labelText_ = 'Duration';\n/**\n * The text that should display over the `DurationDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n\nDurationDisplay.prototype.controlText_ = 'Duration';\nComponent.registerComponent('DurationDisplay', DurationDisplay);\n/**\n * The separator between the current time and duration.\n * Can be hidden if it's not needed in the design.\n *\n * @extends Component\n */\n\nvar TimeDivider =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(TimeDivider, _Component);\n\n  function TimeDivider() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = TimeDivider.prototype;\n  /**\n   * Create the component's DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-time-control vjs-time-divider',\n      innerHTML: '<div><span>/</span></div>'\n    }, {\n      // this element and its contents can be hidden from assistive techs since\n      // it is made extraneous by the announcement of the control text\n      // for the current time and duration displays\n      'aria-hidden': true\n    });\n  };\n\n  return TimeDivider;\n}(Component);\n\nComponent.registerComponent('TimeDivider', TimeDivider);\n/**\n * Displays the time left in the video\n *\n * @extends Component\n */\n\nvar RemainingTimeDisplay =\n/*#__PURE__*/\nfunction (_TimeDisplay) {\n  _inheritsLoose(RemainingTimeDisplay, _TimeDisplay);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function RemainingTimeDisplay(player, options) {\n    var _this;\n\n    _this = _TimeDisplay.call(this, player, options) || this;\n\n    _this.on(player, 'durationchange', _this.throttledUpdateContent);\n\n    _this.on(player, 'ended', _this.handleEnded);\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = RemainingTimeDisplay.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return 'vjs-remaining-time';\n  }\n  /**\n   * Create the `Component`'s DOM element with the \"minus\" characted prepend to the time\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl$1() {\n    var el = _TimeDisplay.prototype.createEl.call(this);\n\n    el.insertBefore(createEl('span', {}, {\n      'aria-hidden': true\n    }, '-'), this.contentEl_);\n    return el;\n  }\n  /**\n   * Update remaining time display.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` or `durationchange` event that caused this to run.\n   *\n   * @listens Player#timeupdate\n   * @listens Player#durationchange\n   */\n  ;\n\n  _proto.updateContent = function updateContent(event) {\n    if (typeof this.player_.duration() !== 'number') {\n      return;\n    } // @deprecated We should only use remainingTimeDisplay\n    // as of video.js 7\n\n\n    if (this.player_.remainingTimeDisplay) {\n      this.updateFormattedTime_(this.player_.remainingTimeDisplay());\n    } else {\n      this.updateFormattedTime_(this.player_.remainingTime());\n    }\n  }\n  /**\n   * When the player fires ended there should be no time left. Sadly\n   * this is not always the case, lets make it seem like that is the case\n   * for users.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `ended` event that caused this to run.\n   *\n   * @listens Player#ended\n   */\n  ;\n\n  _proto.handleEnded = function handleEnded(event) {\n    if (!this.player_.duration()) {\n      return;\n    }\n\n    this.updateFormattedTime_(0);\n  };\n\n  return RemainingTimeDisplay;\n}(TimeDisplay);\n/**\n * The text that is added to the `RemainingTimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nRemainingTimeDisplay.prototype.labelText_ = 'Remaining Time';\n/**\n * The text that should display over the `RemainingTimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n\nRemainingTimeDisplay.prototype.controlText_ = 'Remaining Time';\nComponent.registerComponent('RemainingTimeDisplay', RemainingTimeDisplay);\n/**\n * Displays the live indicator when duration is Infinity.\n *\n * @extends Component\n */\n\nvar LiveDisplay =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(LiveDisplay, _Component);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function LiveDisplay(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    _this.updateShowing();\n\n    _this.on(_this.player(), 'durationchange', _this.updateShowing);\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = LiveDisplay.prototype;\n\n  _proto.createEl = function createEl$1() {\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-live-control vjs-control'\n    });\n\n    this.contentEl_ = createEl('div', {\n      className: 'vjs-live-display',\n      innerHTML: \"<span class=\\\"vjs-control-text\\\">\" + this.localize('Stream Type') + \"\\xA0</span>\" + this.localize('LIVE')\n    }, {\n      'aria-live': 'off'\n    });\n    el.appendChild(this.contentEl_);\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    this.contentEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Check the duration to see if the LiveDisplay should be showing or not. Then show/hide\n   * it accordingly\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#durationchange} event that caused this function to run.\n   *\n   * @listens Player#durationchange\n   */\n  ;\n\n  _proto.updateShowing = function updateShowing(event) {\n    if (this.player().duration() === Infinity) {\n      this.show();\n    } else {\n      this.hide();\n    }\n  };\n\n  return LiveDisplay;\n}(Component);\n\nComponent.registerComponent('LiveDisplay', LiveDisplay);\n/**\n * Displays the live indicator when duration is Infinity.\n *\n * @extends Component\n */\n\nvar SeekToLive =\n/*#__PURE__*/\nfunction (_Button) {\n  _inheritsLoose(SeekToLive, _Button);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function SeekToLive(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n\n    _this.updateLiveEdgeStatus();\n\n    if (_this.player_.liveTracker) {\n      _this.on(_this.player_.liveTracker, 'liveedgechange', _this.updateLiveEdgeStatus);\n    }\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = SeekToLive.prototype;\n\n  _proto.createEl = function createEl$1() {\n    var el = _Button.prototype.createEl.call(this, 'button', {\n      className: 'vjs-seek-to-live-control vjs-control'\n    });\n\n    this.textEl_ = createEl('span', {\n      className: 'vjs-seek-to-live-text',\n      innerHTML: this.localize('LIVE')\n    }, {\n      'aria-hidden': 'true'\n    });\n    el.appendChild(this.textEl_);\n    return el;\n  }\n  /**\n   * Update the state of this button if we are at the live edge\n   * or not\n   */\n  ;\n\n  _proto.updateLiveEdgeStatus = function updateLiveEdgeStatus(e) {\n    // default to live edge\n    if (!this.player_.liveTracker || this.player_.liveTracker.atLiveEdge()) {\n      this.setAttribute('aria-disabled', true);\n      this.addClass('vjs-at-live-edge');\n      this.controlText('Seek to live, currently playing live');\n    } else {\n      this.setAttribute('aria-disabled', false);\n      this.removeClass('vjs-at-live-edge');\n      this.controlText('Seek to live, currently behind live');\n    }\n  }\n  /**\n   * On click bring us as near to the live point as possible.\n   * This requires that we wait for the next `live-seekable-change`\n   * event which will happen every segment length seconds.\n   */\n  ;\n\n  _proto.handleClick = function handleClick() {\n    this.player_.liveTracker.seekToLiveEdge();\n  }\n  /**\n   * Dispose of the element and stop tracking\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    if (this.player_.liveTracker) {\n      this.off(this.player_.liveTracker, 'liveedgechange', this.updateLiveEdgeStatus);\n    }\n\n    this.textEl_ = null;\n\n    _Button.prototype.dispose.call(this);\n  };\n\n  return SeekToLive;\n}(Button);\n\nSeekToLive.prototype.controlText_ = 'Seek to live, currently playing live';\nComponent.registerComponent('SeekToLive', SeekToLive);\n/**\n * The base functionality for a slider. Can be vertical or horizontal.\n * For instance the volume bar or the seek bar on a video is a slider.\n *\n * @extends Component\n */\n\nvar Slider =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(Slider, _Component);\n  /**\n  * Create an instance of this class\n  *\n  * @param {Player} player\n  *        The `Player` that this class should be attached to.\n  *\n  * @param {Object} [options]\n  *        The key/value store of player options.\n  */\n\n\n  function Slider(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this; // Set property names to bar to match with the child Slider class is looking for\n\n    _this.bar = _this.getChild(_this.options_.barName); // Set a horizontal or vertical class on the slider depending on the slider type\n\n    _this.vertical(!!_this.options_.vertical);\n\n    _this.enable();\n\n    return _this;\n  }\n  /**\n   * Are controls are currently enabled for this slider or not.\n   *\n   * @return {boolean}\n   *         true if controls are enabled, false otherwise\n   */\n\n\n  var _proto = Slider.prototype;\n\n  _proto.enabled = function enabled() {\n    return this.enabled_;\n  }\n  /**\n   * Enable controls for this slider if they are disabled\n   */\n  ;\n\n  _proto.enable = function enable() {\n    if (this.enabled()) {\n      return;\n    }\n\n    this.on('mousedown', this.handleMouseDown);\n    this.on('touchstart', this.handleMouseDown);\n    this.on('keydown', this.handleKeyDown);\n    this.on('click', this.handleClick); // TODO: deprecated, controlsvisible does not seem to be fired\n\n    this.on(this.player_, 'controlsvisible', this.update);\n\n    if (this.playerEvent) {\n      this.on(this.player_, this.playerEvent, this.update);\n    }\n\n    this.removeClass('disabled');\n    this.setAttribute('tabindex', 0);\n    this.enabled_ = true;\n  }\n  /**\n   * Disable controls for this slider if they are enabled\n   */\n  ;\n\n  _proto.disable = function disable() {\n    if (!this.enabled()) {\n      return;\n    }\n\n    var doc = this.bar.el_.ownerDocument;\n    this.off('mousedown', this.handleMouseDown);\n    this.off('touchstart', this.handleMouseDown);\n    this.off('keydown', this.handleKeyDown);\n    this.off('click', this.handleClick);\n    this.off(this.player_, 'controlsvisible', this.update);\n    this.off(doc, 'mousemove', this.handleMouseMove);\n    this.off(doc, 'mouseup', this.handleMouseUp);\n    this.off(doc, 'touchmove', this.handleMouseMove);\n    this.off(doc, 'touchend', this.handleMouseUp);\n    this.removeAttribute('tabindex');\n    this.addClass('disabled');\n\n    if (this.playerEvent) {\n      this.off(this.player_, this.playerEvent, this.update);\n    }\n\n    this.enabled_ = false;\n  }\n  /**\n   * Create the `Slider`s DOM element.\n   *\n   * @param {string} type\n   *        Type of element to create.\n   *\n   * @param {Object} [props={}]\n   *        List of properties in Object form.\n   *\n   * @param {Object} [attributes={}]\n   *        list of attributes in Object form.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl(type, props, attributes) {\n    if (props === void 0) {\n      props = {};\n    }\n\n    if (attributes === void 0) {\n      attributes = {};\n    } // Add the slider element class to all sub classes\n\n\n    props.className = props.className + ' vjs-slider';\n    props = assign({\n      tabIndex: 0\n    }, props);\n    attributes = assign({\n      'role': 'slider',\n      'aria-valuenow': 0,\n      'aria-valuemin': 0,\n      'aria-valuemax': 100,\n      'tabIndex': 0\n    }, attributes);\n    return _Component.prototype.createEl.call(this, type, props, attributes);\n  }\n  /**\n   * Handle `mousedown` or `touchstart` events on the `Slider`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   * @fires Slider#slideractive\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    var doc = this.bar.el_.ownerDocument;\n\n    if (event.type === 'mousedown') {\n      event.preventDefault();\n    } // Do not call preventDefault() on touchstart in Chrome\n    // to avoid console warnings. Use a 'touch-action: none' style\n    // instead to prevent unintented scrolling.\n    // https://developers.google.com/web/updates/2017/01/scrolling-intervention\n\n\n    if (event.type === 'touchstart' && !IS_CHROME) {\n      event.preventDefault();\n    }\n\n    blockTextSelection();\n    this.addClass('vjs-sliding');\n    /**\n     * Triggered when the slider is in an active state\n     *\n     * @event Slider#slideractive\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('slideractive');\n    this.on(doc, 'mousemove', this.handleMouseMove);\n    this.on(doc, 'mouseup', this.handleMouseUp);\n    this.on(doc, 'touchmove', this.handleMouseMove);\n    this.on(doc, 'touchend', this.handleMouseUp);\n    this.handleMouseMove(event);\n  }\n  /**\n   * Handle the `mousemove`, `touchmove`, and `mousedown` events on this `Slider`.\n   * The `mousemove` and `touchmove` events will only only trigger this function during\n   * `mousedown` and `touchstart`. This is due to {@link Slider#handleMouseDown} and\n   * {@link Slider#handleMouseUp}.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown`, `mousemove`, `touchstart`, or `touchmove` event that triggered\n   *        this function\n   *\n   * @listens mousemove\n   * @listens touchmove\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event) {}\n  /**\n   * Handle `mouseup` or `touchend` events on the `Slider`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mouseup` or `touchend` event that triggered this function.\n   *\n   * @listens touchend\n   * @listens mouseup\n   * @fires Slider#sliderinactive\n   */\n  ;\n\n  _proto.handleMouseUp = function handleMouseUp() {\n    var doc = this.bar.el_.ownerDocument;\n    unblockTextSelection();\n    this.removeClass('vjs-sliding');\n    /**\n     * Triggered when the slider is no longer in an active state.\n     *\n     * @event Slider#sliderinactive\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('sliderinactive');\n    this.off(doc, 'mousemove', this.handleMouseMove);\n    this.off(doc, 'mouseup', this.handleMouseUp);\n    this.off(doc, 'touchmove', this.handleMouseMove);\n    this.off(doc, 'touchend', this.handleMouseUp);\n    this.update();\n  }\n  /**\n   * Update the progress bar of the `Slider`.\n   *\n   * @return {number}\n   *          The percentage of progress the progress bar represents as a\n   *          number from 0 to 1.\n   */\n  ;\n\n  _proto.update = function update() {\n    // In VolumeBar init we have a setTimeout for update that pops and update\n    // to the end of the execution stack. The player is destroyed before then\n    // update will cause an error\n    if (!this.el_) {\n      return;\n    } // If scrubbing, we could use a cached value to make the handle keep up\n    // with the user's mouse. On HTML5 browsers scrubbing is really smooth, but\n    // some flash players are slow, so we might want to utilize this later.\n    // var progress =  (this.player_.scrubbing()) ? this.player_.getCache().currentTime / this.player_.duration() : this.player_.currentTime() / this.player_.duration();\n\n\n    var progress = this.getPercent();\n    var bar = this.bar; // If there's no bar...\n\n    if (!bar) {\n      return;\n    } // Protect against no duration and other division issues\n\n\n    if (typeof progress !== 'number' || progress !== progress || progress < 0 || progress === Infinity) {\n      progress = 0;\n    } // Convert to a percentage for setting\n\n\n    var percentage = (progress * 100).toFixed(2) + '%';\n    var style = bar.el().style; // Set the new bar width or height\n\n    var sizeKey = this.vertical() ? 'height' : 'width';\n\n    if (style[sizeKey] !== percentage) {\n      style[sizeKey] = percentage;\n    }\n\n    return progress;\n  }\n  /**\n   * Calculate distance for slider\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run.\n   *\n   * @return {number}\n   *         The current position of the Slider.\n   *         - position.x for vertical `Slider`s\n   *         - position.y for horizontal `Slider`s\n   */\n  ;\n\n  _proto.calculateDistance = function calculateDistance(event) {\n    var position = getPointerPosition(this.el_, event);\n\n    if (this.vertical()) {\n      return position.y;\n    }\n\n    return position.x;\n  }\n  /**\n   * Handle a `keydown` event on the `Slider`. Watches for left, rigth, up, and down\n   * arrow keys. This function will only be called when the slider has focus. See\n   * {@link Slider#handleFocus} and {@link Slider#handleBlur}.\n   *\n   * @param {EventTarget~Event} event\n   *        the `keydown` event that caused this function to run.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Left and Down Arrows\n    if (keycode.isEventKey(event, 'Left') || keycode.isEventKey(event, 'Down')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.stepBack(); // Up and Right Arrows\n    } else if (keycode.isEventKey(event, 'Right') || keycode.isEventKey(event, 'Up')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.stepForward();\n    } else {\n      // Pass keydown handling up for unsupported keys\n      _Component.prototype.handleKeyDown.call(this, event);\n    }\n  }\n  /**\n   * Listener for click events on slider, used to prevent clicks\n   *   from bubbling up to parent elements like button menus.\n   *\n   * @param {Object} event\n   *        Event that caused this object to run\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    event.stopPropagation();\n    event.preventDefault();\n  }\n  /**\n   * Get/set if slider is horizontal for vertical\n   *\n   * @param {boolean} [bool]\n   *        - true if slider is vertical,\n   *        - false is horizontal\n   *\n   * @return {boolean}\n   *         - true if slider is vertical, and getting\n   *         - false if the slider is horizontal, and getting\n   */\n  ;\n\n  _proto.vertical = function vertical(bool) {\n    if (bool === undefined) {\n      return this.vertical_ || false;\n    }\n\n    this.vertical_ = !!bool;\n\n    if (this.vertical_) {\n      this.addClass('vjs-slider-vertical');\n    } else {\n      this.addClass('vjs-slider-horizontal');\n    }\n  };\n\n  return Slider;\n}(Component);\n\nComponent.registerComponent('Slider', Slider);\n/**\n * Shows loading progress\n *\n * @extends Component\n */\n\nvar LoadProgressBar =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(LoadProgressBar, _Component);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function LoadProgressBar(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.partEls_ = [];\n\n    _this.on(player, 'progress', _this.update);\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = LoadProgressBar.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-load-progress',\n      innerHTML: \"<span class=\\\"vjs-control-text\\\"><span>\" + this.localize('Loaded') + \"</span>: <span class=\\\"vjs-control-text-loaded-percentage\\\">0%</span></span>\"\n    });\n  };\n\n  _proto.dispose = function dispose() {\n    this.partEls_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Update progress bar\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `progress` event that caused this function to run.\n   *\n   * @listens Player#progress\n   */\n  ;\n\n  _proto.update = function update(event) {\n    var liveTracker = this.player_.liveTracker;\n    var buffered = this.player_.buffered();\n    var duration = liveTracker && liveTracker.isLive() ? liveTracker.seekableEnd() : this.player_.duration();\n    var bufferedEnd = this.player_.bufferedEnd();\n    var children = this.partEls_;\n    var controlTextPercentage = this.$('.vjs-control-text-loaded-percentage'); // get the percent width of a time compared to the total end\n\n    var percentify = function percentify(time, end, rounded) {\n      // no NaN\n      var percent = time / end || 0;\n      percent = (percent >= 1 ? 1 : percent) * 100;\n\n      if (rounded) {\n        percent = percent.toFixed(2);\n      }\n\n      return percent + '%';\n    }; // update the width of the progress bar\n\n\n    this.el_.style.width = percentify(bufferedEnd, duration); // update the control-text\n\n    textContent(controlTextPercentage, percentify(bufferedEnd, duration, true)); // add child elements to represent the individual buffered time ranges\n\n    for (var i = 0; i < buffered.length; i++) {\n      var start = buffered.start(i);\n      var end = buffered.end(i);\n      var part = children[i];\n\n      if (!part) {\n        part = this.el_.appendChild(createEl());\n        children[i] = part;\n      } // set the percent based on the width of the progress bar (bufferedEnd)\n\n\n      part.style.left = percentify(start, bufferedEnd);\n      part.style.width = percentify(end - start, bufferedEnd);\n    } // remove unused buffered range elements\n\n\n    for (var _i = children.length; _i > buffered.length; _i--) {\n      this.el_.removeChild(children[_i - 1]);\n    }\n\n    children.length = buffered.length;\n  };\n\n  return LoadProgressBar;\n}(Component);\n\nComponent.registerComponent('LoadProgressBar', LoadProgressBar);\n/**\n * Time tooltips display a time above the progress bar.\n *\n * @extends Component\n */\n\nvar TimeTooltip =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(TimeTooltip, _Component);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function TimeTooltip(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.update = throttle(bind(_assertThisInitialized(_this), _this.update), UPDATE_REFRESH_INTERVAL);\n    return _this;\n  }\n  /**\n   * Create the time tooltip DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = TimeTooltip.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-time-tooltip'\n    }, {\n      'aria-hidden': 'true'\n    });\n  }\n  /**\n   * Updates the position of the time tooltip relative to the `SeekBar`.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   */\n  ;\n\n  _proto.update = function update(seekBarRect, seekBarPoint, content) {\n    var tooltipRect = getBoundingClientRect(this.el_);\n    var playerRect = getBoundingClientRect(this.player_.el());\n    var seekBarPointPx = seekBarRect.width * seekBarPoint; // do nothing if either rect isn't available\n    // for example, if the player isn't in the DOM for testing\n\n    if (!playerRect || !tooltipRect) {\n      return;\n    } // This is the space left of the `seekBarPoint` available within the bounds\n    // of the player. We calculate any gap between the left edge of the player\n    // and the left edge of the `SeekBar` and add the number of pixels in the\n    // `SeekBar` before hitting the `seekBarPoint`\n\n\n    var spaceLeftOfPoint = seekBarRect.left - playerRect.left + seekBarPointPx; // This is the space right of the `seekBarPoint` available within the bounds\n    // of the player. We calculate the number of pixels from the `seekBarPoint`\n    // to the right edge of the `SeekBar` and add to that any gap between the\n    // right edge of the `SeekBar` and the player.\n\n    var spaceRightOfPoint = seekBarRect.width - seekBarPointPx + (playerRect.right - seekBarRect.right); // This is the number of pixels by which the tooltip will need to be pulled\n    // further to the right to center it over the `seekBarPoint`.\n\n    var pullTooltipBy = tooltipRect.width / 2; // Adjust the `pullTooltipBy` distance to the left or right depending on\n    // the results of the space calculations above.\n\n    if (spaceLeftOfPoint < pullTooltipBy) {\n      pullTooltipBy += pullTooltipBy - spaceLeftOfPoint;\n    } else if (spaceRightOfPoint < pullTooltipBy) {\n      pullTooltipBy = spaceRightOfPoint;\n    } // Due to the imprecision of decimal/ratio based calculations and varying\n    // rounding behaviors, there are cases where the spacing adjustment is off\n    // by a pixel or two. This adds insurance to these calculations.\n\n\n    if (pullTooltipBy < 0) {\n      pullTooltipBy = 0;\n    } else if (pullTooltipBy > tooltipRect.width) {\n      pullTooltipBy = tooltipRect.width;\n    }\n\n    this.el_.style.right = \"-\" + pullTooltipBy + \"px\";\n    this.write(content);\n  }\n  /**\n   * Write the time to the tooltip DOM element.\n   *\n   * @param {string} content\n   *        The formatted time for the tooltip.\n   */\n  ;\n\n  _proto.write = function write(content) {\n    textContent(this.el_, content);\n  }\n  /**\n   * Updates the position of the time tooltip relative to the `SeekBar`.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   *\n   * @param {number} time\n   *        The time to update the tooltip to, not used during live playback\n   *\n   * @param {Function} cb\n   *        A function that will be called during the request animation frame\n   *        for tooltips that need to do additional animations from the default\n   */\n  ;\n\n  _proto.updateTime = function updateTime(seekBarRect, seekBarPoint, time, cb) {\n    var _this2 = this; // If there is an existing rAF ID, cancel it so we don't over-queue.\n\n\n    if (this.rafId_) {\n      this.cancelAnimationFrame(this.rafId_);\n    }\n\n    this.rafId_ = this.requestAnimationFrame(function () {\n      var content;\n\n      var duration = _this2.player_.duration();\n\n      if (_this2.player_.liveTracker && _this2.player_.liveTracker.isLive()) {\n        var liveWindow = _this2.player_.liveTracker.liveWindow();\n\n        var secondsBehind = liveWindow - seekBarPoint * liveWindow;\n        content = (secondsBehind < 1 ? '' : '-') + formatTime(secondsBehind, liveWindow);\n      } else {\n        content = formatTime(time, duration);\n      }\n\n      _this2.update(seekBarRect, seekBarPoint, content);\n\n      if (cb) {\n        cb();\n      }\n    });\n  };\n\n  return TimeTooltip;\n}(Component);\n\nComponent.registerComponent('TimeTooltip', TimeTooltip);\n/**\n * Used by {@link SeekBar} to display media playback progress as part of the\n * {@link ProgressControl}.\n *\n * @extends Component\n */\n\nvar PlayProgressBar =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(PlayProgressBar, _Component);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function PlayProgressBar(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.update = throttle(bind(_assertThisInitialized(_this), _this.update), UPDATE_REFRESH_INTERVAL);\n    return _this;\n  }\n  /**\n   * Create the the DOM element for this class.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = PlayProgressBar.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-play-progress vjs-slider-bar'\n    }, {\n      'aria-hidden': 'true'\n    });\n  }\n  /**\n   * Enqueues updates to its own DOM as well as the DOM of its\n   * {@link TimeTooltip} child.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   */\n  ;\n\n  _proto.update = function update(seekBarRect, seekBarPoint) {\n    var timeTooltip = this.getChild('timeTooltip');\n\n    if (!timeTooltip) {\n      return;\n    }\n\n    var time = this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();\n    timeTooltip.updateTime(seekBarRect, seekBarPoint, time);\n  };\n\n  return PlayProgressBar;\n}(Component);\n/**\n * Default options for {@link PlayProgressBar}.\n *\n * @type {Object}\n * @private\n */\n\n\nPlayProgressBar.prototype.options_ = {\n  children: []\n}; // Time tooltips should not be added to a player on mobile devices\n\nif (!IS_IOS && !IS_ANDROID) {\n  PlayProgressBar.prototype.options_.children.push('timeTooltip');\n}\n\nComponent.registerComponent('PlayProgressBar', PlayProgressBar);\n/**\n * The {@link MouseTimeDisplay} component tracks mouse movement over the\n * {@link ProgressControl}. It displays an indicator and a {@link TimeTooltip}\n * indicating the time which is represented by a given point in the\n * {@link ProgressControl}.\n *\n * @extends Component\n */\n\nvar MouseTimeDisplay =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(MouseTimeDisplay, _Component);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function MouseTimeDisplay(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.update = throttle(bind(_assertThisInitialized(_this), _this.update), UPDATE_REFRESH_INTERVAL);\n    return _this;\n  }\n  /**\n   * Create the DOM element for this class.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = MouseTimeDisplay.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-mouse-display'\n    });\n  }\n  /**\n   * Enqueues updates to its own DOM as well as the DOM of its\n   * {@link TimeTooltip} child.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   */\n  ;\n\n  _proto.update = function update(seekBarRect, seekBarPoint) {\n    var _this2 = this;\n\n    var time = seekBarPoint * this.player_.duration();\n    this.getChild('timeTooltip').updateTime(seekBarRect, seekBarPoint, time, function () {\n      _this2.el_.style.left = seekBarRect.width * seekBarPoint + \"px\";\n    });\n  };\n\n  return MouseTimeDisplay;\n}(Component);\n/**\n * Default options for `MouseTimeDisplay`\n *\n * @type {Object}\n * @private\n */\n\n\nMouseTimeDisplay.prototype.options_ = {\n  children: ['timeTooltip']\n};\nComponent.registerComponent('MouseTimeDisplay', MouseTimeDisplay);\nvar STEP_SECONDS = 5; // The multiplier of STEP_SECONDS that PgUp/PgDown move the timeline.\n\nvar PAGE_KEY_MULTIPLIER = 12; // The interval at which the bar should update as it progresses.\n\nvar UPDATE_REFRESH_INTERVAL$1 = 30;\n/**\n * Seek bar and container for the progress bars. Uses {@link PlayProgressBar}\n * as its `bar`.\n *\n * @extends Slider\n */\n\nvar SeekBar =\n/*#__PURE__*/\nfunction (_Slider) {\n  _inheritsLoose(SeekBar, _Slider);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function SeekBar(player, options) {\n    var _this;\n\n    _this = _Slider.call(this, player, options) || this;\n\n    _this.setEventHandlers_();\n\n    return _this;\n  }\n  /**\n   * Sets the event handlers\n   *\n   * @private\n   */\n\n\n  var _proto = SeekBar.prototype;\n\n  _proto.setEventHandlers_ = function setEventHandlers_() {\n    this.update = throttle(bind(this, this.update), UPDATE_REFRESH_INTERVAL$1);\n    this.on(this.player_, 'timeupdate', this.update);\n    this.on(this.player_, 'ended', this.handleEnded);\n    this.on(this.player_, 'durationchange', this.update);\n\n    if (this.player_.liveTracker) {\n      this.on(this.player_.liveTracker, 'liveedgechange', this.update);\n    } // when playing, let's ensure we smoothly update the play progress bar\n    // via an interval\n\n\n    this.updateInterval = null;\n    this.on(this.player_, ['playing'], this.enableInterval_);\n    this.on(this.player_, ['ended', 'pause', 'waiting'], this.disableInterval_); // we don't need to update the play progress if the document is hidden,\n    // also, this causes the CPU to spike and eventually crash the page on IE11.\n\n    if ('hidden' in document && 'visibilityState' in document) {\n      this.on(document, 'visibilitychange', this.toggleVisibility_);\n    }\n  };\n\n  _proto.toggleVisibility_ = function toggleVisibility_(e) {\n    if (document.hidden) {\n      this.disableInterval_(e);\n    } else {\n      this.enableInterval_(); // we just switched back to the page and someone may be looking, so, update ASAP\n\n      this.requestAnimationFrame(this.update);\n    }\n  };\n\n  _proto.enableInterval_ = function enableInterval_() {\n    var _this2 = this;\n\n    this.clearInterval(this.updateInterval);\n    this.updateInterval = this.setInterval(function () {\n      _this2.requestAnimationFrame(_this2.update);\n    }, UPDATE_REFRESH_INTERVAL$1);\n  };\n\n  _proto.disableInterval_ = function disableInterval_(e) {\n    if (this.player_.liveTracker && this.player_.liveTracker.isLive() && e.type !== 'ended') {\n      return;\n    }\n\n    this.clearInterval(this.updateInterval);\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    return _Slider.prototype.createEl.call(this, 'div', {\n      className: 'vjs-progress-holder'\n    }, {\n      'aria-label': this.localize('Progress Bar')\n    });\n  }\n  /**\n   * This function updates the play progress bar and accessibility\n   * attributes to whatever is passed in.\n   *\n   * @param {number} currentTime\n   *        The currentTime value that should be used for accessibility\n   *\n   * @param {number} percent\n   *        The percentage as a decimal that the bar should be filled from 0-1.\n   *\n   * @private\n   */\n  ;\n\n  _proto.update_ = function update_(currentTime, percent) {\n    var liveTracker = this.player_.liveTracker;\n    var duration = this.player_.duration();\n\n    if (liveTracker && liveTracker.isLive()) {\n      duration = this.player_.liveTracker.liveCurrentTime();\n    } // machine readable value of progress bar (percentage complete)\n\n\n    this.el_.setAttribute('aria-valuenow', (percent * 100).toFixed(2)); // human readable value of progress bar (time complete)\n\n    this.el_.setAttribute('aria-valuetext', this.localize('progress bar timing: currentTime={1} duration={2}', [formatTime(currentTime, duration), formatTime(duration, duration)], '{1} of {2}')); // Update the `PlayProgressBar`.\n\n    if (this.bar) {\n      this.bar.update(getBoundingClientRect(this.el_), percent);\n    }\n  }\n  /**\n   * Update the seek bar's UI.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` or `ended` event that caused this to run.\n   *\n   * @listens Player#timeupdate\n   *\n   * @return {number}\n   *          The current percent at a number from 0-1\n   */\n  ;\n\n  _proto.update = function update(event) {\n    // if the offsetParent is null, then this element is hidden, in which case\n    // we don't need to update it.\n    if (this.el().offsetParent === null) {\n      return;\n    }\n\n    var percent = _Slider.prototype.update.call(this);\n\n    this.update_(this.getCurrentTime_(), percent);\n    return percent;\n  }\n  /**\n   * Get the value of current time but allows for smooth scrubbing,\n   * when player can't keep up.\n   *\n   * @return {number}\n   *         The current time value to display\n   *\n   * @private\n   */\n  ;\n\n  _proto.getCurrentTime_ = function getCurrentTime_() {\n    return this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();\n  }\n  /**\n   * We want the seek bar to be full on ended\n   * no matter what the actual internal values are. so we force it.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` or `ended` event that caused this to run.\n   *\n   * @listens Player#ended\n   */\n  ;\n\n  _proto.handleEnded = function handleEnded(event) {\n    this.update_(this.player_.duration(), 1);\n  }\n  /**\n   * Get the percentage of media played so far.\n   *\n   * @return {number}\n   *         The percentage of media played so far (0 to 1).\n   */\n  ;\n\n  _proto.getPercent = function getPercent() {\n    var currentTime = this.getCurrentTime_();\n    var percent;\n    var liveTracker = this.player_.liveTracker;\n\n    if (liveTracker && liveTracker.isLive()) {\n      percent = (currentTime - liveTracker.seekableStart()) / liveTracker.liveWindow(); // prevent the percent from changing at the live edge\n\n      if (liveTracker.atLiveEdge()) {\n        percent = 1;\n      }\n    } else {\n      percent = currentTime / this.player_.duration();\n    }\n\n    return percent >= 1 ? 1 : percent || 0;\n  }\n  /**\n   * Handle mouse down on seek bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousedown` event that caused this to run.\n   *\n   * @listens mousedown\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    } // Stop event propagation to prevent double fire in progress-control.js\n\n\n    event.stopPropagation();\n    this.player_.scrubbing(true);\n    this.videoWasPlaying = !this.player_.paused();\n    this.player_.pause();\n\n    _Slider.prototype.handleMouseDown.call(this, event);\n  }\n  /**\n   * Handle mouse move on seek bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousemove` event that caused this to run.\n   *\n   * @listens mousemove\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    var newTime;\n    var distance = this.calculateDistance(event);\n    var liveTracker = this.player_.liveTracker;\n\n    if (!liveTracker || !liveTracker.isLive()) {\n      newTime = distance * this.player_.duration(); // Don't let video end while scrubbing.\n\n      if (newTime === this.player_.duration()) {\n        newTime = newTime - 0.1;\n      }\n    } else {\n      var seekableStart = liveTracker.seekableStart();\n      var seekableEnd = liveTracker.liveCurrentTime();\n      newTime = seekableStart + distance * liveTracker.liveWindow(); // Don't let video end while scrubbing.\n\n      if (newTime >= seekableEnd) {\n        newTime = seekableEnd;\n      } // Compensate for precision differences so that currentTime is not less\n      // than seekable start\n\n\n      if (newTime <= seekableStart) {\n        newTime = seekableStart + 0.1;\n      } // On android seekableEnd can be Infinity sometimes,\n      // this will cause newTime to be Infinity, which is\n      // not a valid currentTime.\n\n\n      if (newTime === Infinity) {\n        return;\n      }\n    } // Set new time (tell player to seek to new time)\n\n\n    this.player_.currentTime(newTime);\n  };\n\n  _proto.enable = function enable() {\n    _Slider.prototype.enable.call(this);\n\n    var mouseTimeDisplay = this.getChild('mouseTimeDisplay');\n\n    if (!mouseTimeDisplay) {\n      return;\n    }\n\n    mouseTimeDisplay.show();\n  };\n\n  _proto.disable = function disable() {\n    _Slider.prototype.disable.call(this);\n\n    var mouseTimeDisplay = this.getChild('mouseTimeDisplay');\n\n    if (!mouseTimeDisplay) {\n      return;\n    }\n\n    mouseTimeDisplay.hide();\n  }\n  /**\n   * Handle mouse up on seek bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mouseup` event that caused this to run.\n   *\n   * @listens mouseup\n   */\n  ;\n\n  _proto.handleMouseUp = function handleMouseUp(event) {\n    _Slider.prototype.handleMouseUp.call(this, event); // Stop event propagation to prevent double fire in progress-control.js\n\n\n    if (event) {\n      event.stopPropagation();\n    }\n\n    this.player_.scrubbing(false);\n    /**\n     * Trigger timeupdate because we're done seeking and the time has changed.\n     * This is particularly useful for if the player is paused to time the time displays.\n     *\n     * @event Tech#timeupdate\n     * @type {EventTarget~Event}\n     */\n\n    this.player_.trigger({\n      type: 'timeupdate',\n      target: this,\n      manuallyTriggered: true\n    });\n\n    if (this.videoWasPlaying) {\n      silencePromise(this.player_.play());\n    }\n  }\n  /**\n   * Move more quickly fast forward for keyboard-only users\n   */\n  ;\n\n  _proto.stepForward = function stepForward() {\n    this.player_.currentTime(this.player_.currentTime() + STEP_SECONDS);\n  }\n  /**\n   * Move more quickly rewind for keyboard-only users\n   */\n  ;\n\n  _proto.stepBack = function stepBack() {\n    this.player_.currentTime(this.player_.currentTime() - STEP_SECONDS);\n  }\n  /**\n   * Toggles the playback state of the player\n   * This gets called when enter or space is used on the seekbar\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called\n   *\n   */\n  ;\n\n  _proto.handleAction = function handleAction(event) {\n    if (this.player_.paused()) {\n      this.player_.play();\n    } else {\n      this.player_.pause();\n    }\n  }\n  /**\n   * Called when this SeekBar has focus and a key gets pressed down.\n   * Supports the following keys:\n   *\n   *   Space or Enter key fire a click event\n   *   Home key moves to start of the timeline\n   *   End key moves to end of the timeline\n   *   Digit \"0\" through \"9\" keys move to 0%, 10% ... 80%, 90% of the timeline\n   *   PageDown key moves back a larger step than ArrowDown\n   *   PageUp key moves forward a large step\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    if (keycode.isEventKey(event, 'Space') || keycode.isEventKey(event, 'Enter')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.handleAction(event);\n    } else if (keycode.isEventKey(event, 'Home')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.player_.currentTime(0);\n    } else if (keycode.isEventKey(event, 'End')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.player_.currentTime(this.player_.duration());\n    } else if (/^[0-9]$/.test(keycode(event))) {\n      event.preventDefault();\n      event.stopPropagation();\n      var gotoFraction = (keycode.codes[keycode(event)] - keycode.codes['0']) * 10.0 / 100.0;\n      this.player_.currentTime(this.player_.duration() * gotoFraction);\n    } else if (keycode.isEventKey(event, 'PgDn')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.player_.currentTime(this.player_.currentTime() - STEP_SECONDS * PAGE_KEY_MULTIPLIER);\n    } else if (keycode.isEventKey(event, 'PgUp')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.player_.currentTime(this.player_.currentTime() + STEP_SECONDS * PAGE_KEY_MULTIPLIER);\n    } else {\n      // Pass keydown handling up for unsupported keys\n      _Slider.prototype.handleKeyDown.call(this, event);\n    }\n  };\n\n  return SeekBar;\n}(Slider);\n/**\n * Default options for the `SeekBar`\n *\n * @type {Object}\n * @private\n */\n\n\nSeekBar.prototype.options_ = {\n  children: ['loadProgressBar', 'playProgressBar'],\n  barName: 'playProgressBar'\n}; // MouseTimeDisplay tooltips should not be added to a player on mobile devices\n\nif (!IS_IOS && !IS_ANDROID) {\n  SeekBar.prototype.options_.children.splice(1, 0, 'mouseTimeDisplay');\n}\n\nComponent.registerComponent('SeekBar', SeekBar);\n/**\n * The Progress Control component contains the seek bar, load progress,\n * and play progress.\n *\n * @extends Component\n */\n\nvar ProgressControl =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(ProgressControl, _Component);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function ProgressControl(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.handleMouseMove = throttle(bind(_assertThisInitialized(_this), _this.handleMouseMove), UPDATE_REFRESH_INTERVAL);\n    _this.throttledHandleMouseSeek = throttle(bind(_assertThisInitialized(_this), _this.handleMouseSeek), UPDATE_REFRESH_INTERVAL);\n\n    _this.enable();\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = ProgressControl.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-progress-control vjs-control'\n    });\n  }\n  /**\n   * When the mouse moves over the `ProgressControl`, the pointer position\n   * gets passed down to the `MouseTimeDisplay` component.\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousemove` event that caused this function to run.\n   *\n   * @listen mousemove\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event) {\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      var mouseTimeDisplay = seekBar.getChild('mouseTimeDisplay');\n      var seekBarEl = seekBar.el();\n      var seekBarRect = getBoundingClientRect(seekBarEl);\n      var seekBarPoint = getPointerPosition(seekBarEl, event).x; // The default skin has a gap on either side of the `SeekBar`. This means\n      // that it's possible to trigger this behavior outside the boundaries of\n      // the `SeekBar`. This ensures we stay within it at all times.\n\n      if (seekBarPoint > 1) {\n        seekBarPoint = 1;\n      } else if (seekBarPoint < 0) {\n        seekBarPoint = 0;\n      }\n\n      if (mouseTimeDisplay) {\n        mouseTimeDisplay.update(seekBarRect, seekBarPoint);\n      }\n    }\n  }\n  /**\n   * A throttled version of the {@link ProgressControl#handleMouseSeek} listener.\n   *\n   * @method ProgressControl#throttledHandleMouseSeek\n   * @param {EventTarget~Event} event\n   *        The `mousemove` event that caused this function to run.\n   *\n   * @listen mousemove\n   * @listen touchmove\n   */\n\n  /**\n   * Handle `mousemove` or `touchmove` events on the `ProgressControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousemove\n   * @listens touchmove\n   */\n  ;\n\n  _proto.handleMouseSeek = function handleMouseSeek(event) {\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      seekBar.handleMouseMove(event);\n    }\n  }\n  /**\n   * Are controls are currently enabled for this progress control.\n   *\n   * @return {boolean}\n   *         true if controls are enabled, false otherwise\n   */\n  ;\n\n  _proto.enabled = function enabled() {\n    return this.enabled_;\n  }\n  /**\n   * Disable all controls on the progress control and its children\n   */\n  ;\n\n  _proto.disable = function disable() {\n    this.children().forEach(function (child) {\n      return child.disable && child.disable();\n    });\n\n    if (!this.enabled()) {\n      return;\n    }\n\n    this.off(['mousedown', 'touchstart'], this.handleMouseDown);\n    this.off(this.el_, 'mousemove', this.handleMouseMove);\n    this.handleMouseUp();\n    this.addClass('disabled');\n    this.enabled_ = false;\n  }\n  /**\n   * Enable all controls on the progress control and its children\n   */\n  ;\n\n  _proto.enable = function enable() {\n    this.children().forEach(function (child) {\n      return child.enable && child.enable();\n    });\n\n    if (this.enabled()) {\n      return;\n    }\n\n    this.on(['mousedown', 'touchstart'], this.handleMouseDown);\n    this.on(this.el_, 'mousemove', this.handleMouseMove);\n    this.removeClass('disabled');\n    this.enabled_ = true;\n  }\n  /**\n   * Handle `mousedown` or `touchstart` events on the `ProgressControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    var doc = this.el_.ownerDocument;\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      seekBar.handleMouseDown(event);\n    }\n\n    this.on(doc, 'mousemove', this.throttledHandleMouseSeek);\n    this.on(doc, 'touchmove', this.throttledHandleMouseSeek);\n    this.on(doc, 'mouseup', this.handleMouseUp);\n    this.on(doc, 'touchend', this.handleMouseUp);\n  }\n  /**\n   * Handle `mouseup` or `touchend` events on the `ProgressControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mouseup` or `touchend` event that triggered this function.\n   *\n   * @listens touchend\n   * @listens mouseup\n   */\n  ;\n\n  _proto.handleMouseUp = function handleMouseUp(event) {\n    var doc = this.el_.ownerDocument;\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      seekBar.handleMouseUp(event);\n    }\n\n    this.off(doc, 'mousemove', this.throttledHandleMouseSeek);\n    this.off(doc, 'touchmove', this.throttledHandleMouseSeek);\n    this.off(doc, 'mouseup', this.handleMouseUp);\n    this.off(doc, 'touchend', this.handleMouseUp);\n  };\n\n  return ProgressControl;\n}(Component);\n/**\n * Default options for `ProgressControl`\n *\n * @type {Object}\n * @private\n */\n\n\nProgressControl.prototype.options_ = {\n  children: ['seekBar']\n};\nComponent.registerComponent('ProgressControl', ProgressControl);\n/**\n * Toggle Picture-in-Picture mode\n *\n * @extends Button\n */\n\nvar PictureInPictureToggle =\n/*#__PURE__*/\nfunction (_Button) {\n  _inheritsLoose(PictureInPictureToggle, _Button);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @listens Player#enterpictureinpicture\n   * @listens Player#leavepictureinpicture\n   */\n\n\n  function PictureInPictureToggle(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n\n    _this.on(player, ['enterpictureinpicture', 'leavepictureinpicture'], _this.handlePictureInPictureChange); // TODO: Activate button on player loadedmetadata event.\n    // TODO: Deactivate button on player emptied event.\n    // TODO: Deactivate button if disablepictureinpicture attribute is present.\n\n\n    if (!document.pictureInPictureEnabled) {\n      _this.disable();\n    }\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = PictureInPictureToggle.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-picture-in-picture-control \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Handles enterpictureinpicture and leavepictureinpicture on the player and change control text accordingly.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#enterpictureinpicture} or {@link Player#leavepictureinpicture} event that caused this function to be\n   *        called.\n   *\n   * @listens Player#enterpictureinpicture\n   * @listens Player#leavepictureinpicture\n   */\n  ;\n\n  _proto.handlePictureInPictureChange = function handlePictureInPictureChange(event) {\n    if (this.player_.isInPictureInPicture()) {\n      this.controlText('Exit Picture-in-Picture');\n    } else {\n      this.controlText('Picture-in-Picture');\n    }\n  }\n  /**\n   * This gets called when an `PictureInPictureToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    if (!this.player_.isInPictureInPicture()) {\n      this.player_.requestPictureInPicture();\n    } else {\n      this.player_.exitPictureInPicture();\n    }\n  };\n\n  return PictureInPictureToggle;\n}(Button);\n/**\n * The text that should display over the `PictureInPictureToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPictureInPictureToggle.prototype.controlText_ = 'Picture-in-Picture';\nComponent.registerComponent('PictureInPictureToggle', PictureInPictureToggle);\n/**\n * Toggle fullscreen video\n *\n * @extends Button\n */\n\nvar FullscreenToggle =\n/*#__PURE__*/\nfunction (_Button) {\n  _inheritsLoose(FullscreenToggle, _Button);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function FullscreenToggle(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n\n    _this.on(player, 'fullscreenchange', _this.handleFullscreenChange);\n\n    if (document[player.fsApi_.fullscreenEnabled] === false) {\n      _this.disable();\n    }\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = FullscreenToggle.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-fullscreen-control \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Handles fullscreenchange on the player and change control text accordingly.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#fullscreenchange} event that caused this function to be\n   *        called.\n   *\n   * @listens Player#fullscreenchange\n   */\n  ;\n\n  _proto.handleFullscreenChange = function handleFullscreenChange(event) {\n    if (this.player_.isFullscreen()) {\n      this.controlText('Non-Fullscreen');\n    } else {\n      this.controlText('Fullscreen');\n    }\n  }\n  /**\n   * This gets called when an `FullscreenToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    if (!this.player_.isFullscreen()) {\n      this.player_.requestFullscreen();\n    } else {\n      this.player_.exitFullscreen();\n    }\n  };\n\n  return FullscreenToggle;\n}(Button);\n/**\n * The text that should display over the `FullscreenToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nFullscreenToggle.prototype.controlText_ = 'Fullscreen';\nComponent.registerComponent('FullscreenToggle', FullscreenToggle);\n/**\n * Check if volume control is supported and if it isn't hide the\n * `Component` that was passed  using the `vjs-hidden` class.\n *\n * @param {Component} self\n *        The component that should be hidden if volume is unsupported\n *\n * @param {Player} player\n *        A reference to the player\n *\n * @private\n */\n\nvar checkVolumeSupport = function checkVolumeSupport(self, player) {\n  // hide volume controls when they're not supported by the current tech\n  if (player.tech_ && !player.tech_.featuresVolumeControl) {\n    self.addClass('vjs-hidden');\n  }\n\n  self.on(player, 'loadstart', function () {\n    if (!player.tech_.featuresVolumeControl) {\n      self.addClass('vjs-hidden');\n    } else {\n      self.removeClass('vjs-hidden');\n    }\n  });\n};\n/**\n * Shows volume level\n *\n * @extends Component\n */\n\n\nvar VolumeLevel =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(VolumeLevel, _Component);\n\n  function VolumeLevel() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = VolumeLevel.prototype;\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-volume-level',\n      innerHTML: '<span class=\"vjs-control-text\"></span>'\n    });\n  };\n\n  return VolumeLevel;\n}(Component);\n\nComponent.registerComponent('VolumeLevel', VolumeLevel);\n/**\n * The bar that contains the volume level and can be clicked on to adjust the level\n *\n * @extends Slider\n */\n\nvar VolumeBar =\n/*#__PURE__*/\nfunction (_Slider) {\n  _inheritsLoose(VolumeBar, _Slider);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function VolumeBar(player, options) {\n    var _this;\n\n    _this = _Slider.call(this, player, options) || this;\n\n    _this.on('slideractive', _this.updateLastVolume_);\n\n    _this.on(player, 'volumechange', _this.updateARIAAttributes);\n\n    player.ready(function () {\n      return _this.updateARIAAttributes();\n    });\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = VolumeBar.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Slider.prototype.createEl.call(this, 'div', {\n      className: 'vjs-volume-bar vjs-slider-bar'\n    }, {\n      'aria-label': this.localize('Volume Level'),\n      'aria-live': 'polite'\n    });\n  }\n  /**\n   * Handle mouse down on volume bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousedown` event that caused this to run.\n   *\n   * @listens mousedown\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    _Slider.prototype.handleMouseDown.call(this, event);\n  }\n  /**\n   * Handle movement events on the {@link VolumeMenuButton}.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run.\n   *\n   * @listens mousemove\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    this.checkMuted();\n    this.player_.volume(this.calculateDistance(event));\n  }\n  /**\n   * If the player is muted unmute it.\n   */\n  ;\n\n  _proto.checkMuted = function checkMuted() {\n    if (this.player_.muted()) {\n      this.player_.muted(false);\n    }\n  }\n  /**\n   * Get percent of volume level\n   *\n   * @return {number}\n   *         Volume level percent as a decimal number.\n   */\n  ;\n\n  _proto.getPercent = function getPercent() {\n    if (this.player_.muted()) {\n      return 0;\n    }\n\n    return this.player_.volume();\n  }\n  /**\n   * Increase volume level for keyboard users\n   */\n  ;\n\n  _proto.stepForward = function stepForward() {\n    this.checkMuted();\n    this.player_.volume(this.player_.volume() + 0.1);\n  }\n  /**\n   * Decrease volume level for keyboard users\n   */\n  ;\n\n  _proto.stepBack = function stepBack() {\n    this.checkMuted();\n    this.player_.volume(this.player_.volume() - 0.1);\n  }\n  /**\n   * Update ARIA accessibility attributes\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `volumechange` event that caused this function to run.\n   *\n   * @listens Player#volumechange\n   */\n  ;\n\n  _proto.updateARIAAttributes = function updateARIAAttributes(event) {\n    var ariaValue = this.player_.muted() ? 0 : this.volumeAsPercentage_();\n    this.el_.setAttribute('aria-valuenow', ariaValue);\n    this.el_.setAttribute('aria-valuetext', ariaValue + '%');\n  }\n  /**\n   * Returns the current value of the player volume as a percentage\n   *\n   * @private\n   */\n  ;\n\n  _proto.volumeAsPercentage_ = function volumeAsPercentage_() {\n    return Math.round(this.player_.volume() * 100);\n  }\n  /**\n   * When user starts dragging the VolumeBar, store the volume and listen for\n   * the end of the drag. When the drag ends, if the volume was set to zero,\n   * set lastVolume to the stored volume.\n   *\n   * @listens slideractive\n   * @private\n   */\n  ;\n\n  _proto.updateLastVolume_ = function updateLastVolume_() {\n    var _this2 = this;\n\n    var volumeBeforeDrag = this.player_.volume();\n    this.one('sliderinactive', function () {\n      if (_this2.player_.volume() === 0) {\n        _this2.player_.lastVolume_(volumeBeforeDrag);\n      }\n    });\n  };\n\n  return VolumeBar;\n}(Slider);\n/**\n * Default options for the `VolumeBar`\n *\n * @type {Object}\n * @private\n */\n\n\nVolumeBar.prototype.options_ = {\n  children: ['volumeLevel'],\n  barName: 'volumeLevel'\n};\n/**\n * Call the update event for this Slider when this event happens on the player.\n *\n * @type {string}\n */\n\nVolumeBar.prototype.playerEvent = 'volumechange';\nComponent.registerComponent('VolumeBar', VolumeBar);\n/**\n * The component for controlling the volume level\n *\n * @extends Component\n */\n\nvar VolumeControl =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(VolumeControl, _Component);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n\n\n  function VolumeControl(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    options.vertical = options.vertical || false; // Pass the vertical option down to the VolumeBar if\n    // the VolumeBar is turned on.\n\n    if (typeof options.volumeBar === 'undefined' || isPlain(options.volumeBar)) {\n      options.volumeBar = options.volumeBar || {};\n      options.volumeBar.vertical = options.vertical;\n    }\n\n    _this = _Component.call(this, player, options) || this; // hide this control if volume support is missing\n\n    checkVolumeSupport(_assertThisInitialized(_this), player);\n    _this.throttledHandleMouseMove = throttle(bind(_assertThisInitialized(_this), _this.handleMouseMove), UPDATE_REFRESH_INTERVAL);\n\n    _this.on('mousedown', _this.handleMouseDown);\n\n    _this.on('touchstart', _this.handleMouseDown); // while the slider is active (the mouse has been pressed down and\n    // is dragging) or in focus we do not want to hide the VolumeBar\n\n\n    _this.on(_this.volumeBar, ['focus', 'slideractive'], function () {\n      _this.volumeBar.addClass('vjs-slider-active');\n\n      _this.addClass('vjs-slider-active');\n\n      _this.trigger('slideractive');\n    });\n\n    _this.on(_this.volumeBar, ['blur', 'sliderinactive'], function () {\n      _this.volumeBar.removeClass('vjs-slider-active');\n\n      _this.removeClass('vjs-slider-active');\n\n      _this.trigger('sliderinactive');\n    });\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = VolumeControl.prototype;\n\n  _proto.createEl = function createEl() {\n    var orientationClass = 'vjs-volume-horizontal';\n\n    if (this.options_.vertical) {\n      orientationClass = 'vjs-volume-vertical';\n    }\n\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: \"vjs-volume-control vjs-control \" + orientationClass\n    });\n  }\n  /**\n   * Handle `mousedown` or `touchstart` events on the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    var doc = this.el_.ownerDocument;\n    this.on(doc, 'mousemove', this.throttledHandleMouseMove);\n    this.on(doc, 'touchmove', this.throttledHandleMouseMove);\n    this.on(doc, 'mouseup', this.handleMouseUp);\n    this.on(doc, 'touchend', this.handleMouseUp);\n  }\n  /**\n   * Handle `mouseup` or `touchend` events on the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mouseup` or `touchend` event that triggered this function.\n   *\n   * @listens touchend\n   * @listens mouseup\n   */\n  ;\n\n  _proto.handleMouseUp = function handleMouseUp(event) {\n    var doc = this.el_.ownerDocument;\n    this.off(doc, 'mousemove', this.throttledHandleMouseMove);\n    this.off(doc, 'touchmove', this.throttledHandleMouseMove);\n    this.off(doc, 'mouseup', this.handleMouseUp);\n    this.off(doc, 'touchend', this.handleMouseUp);\n  }\n  /**\n   * Handle `mousedown` or `touchstart` events on the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event) {\n    this.volumeBar.handleMouseMove(event);\n  };\n\n  return VolumeControl;\n}(Component);\n/**\n * Default options for the `VolumeControl`\n *\n * @type {Object}\n * @private\n */\n\n\nVolumeControl.prototype.options_ = {\n  children: ['volumeBar']\n};\nComponent.registerComponent('VolumeControl', VolumeControl);\n/**\n * Check if muting volume is supported and if it isn't hide the mute toggle\n * button.\n *\n * @param {Component} self\n *        A reference to the mute toggle button\n *\n * @param {Player} player\n *        A reference to the player\n *\n * @private\n */\n\nvar checkMuteSupport = function checkMuteSupport(self, player) {\n  // hide mute toggle button if it's not supported by the current tech\n  if (player.tech_ && !player.tech_.featuresMuteControl) {\n    self.addClass('vjs-hidden');\n  }\n\n  self.on(player, 'loadstart', function () {\n    if (!player.tech_.featuresMuteControl) {\n      self.addClass('vjs-hidden');\n    } else {\n      self.removeClass('vjs-hidden');\n    }\n  });\n};\n/**\n * A button component for muting the audio.\n *\n * @extends Button\n */\n\n\nvar MuteToggle =\n/*#__PURE__*/\nfunction (_Button) {\n  _inheritsLoose(MuteToggle, _Button);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function MuteToggle(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this; // hide this control if volume support is missing\n\n    checkMuteSupport(_assertThisInitialized(_this), player);\n\n    _this.on(player, ['loadstart', 'volumechange'], _this.update);\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = MuteToggle.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-mute-control \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * This gets called when an `MuteToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    var vol = this.player_.volume();\n    var lastVolume = this.player_.lastVolume_();\n\n    if (vol === 0) {\n      var volumeToSet = lastVolume < 0.1 ? 0.1 : lastVolume;\n      this.player_.volume(volumeToSet);\n      this.player_.muted(false);\n    } else {\n      this.player_.muted(this.player_.muted() ? false : true);\n    }\n  }\n  /**\n   * Update the `MuteToggle` button based on the state of `volume` and `muted`\n   * on the player.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#loadstart} event if this function was called\n   *        through an event.\n   *\n   * @listens Player#loadstart\n   * @listens Player#volumechange\n   */\n  ;\n\n  _proto.update = function update(event) {\n    this.updateIcon_();\n    this.updateControlText_();\n  }\n  /**\n   * Update the appearance of the `MuteToggle` icon.\n   *\n   * Possible states (given `level` variable below):\n   * - 0: crossed out\n   * - 1: zero bars of volume\n   * - 2: one bar of volume\n   * - 3: two bars of volume\n   *\n   * @private\n   */\n  ;\n\n  _proto.updateIcon_ = function updateIcon_() {\n    var vol = this.player_.volume();\n    var level = 3; // in iOS when a player is loaded with muted attribute\n    // and volume is changed with a native mute button\n    // we want to make sure muted state is updated\n\n    if (IS_IOS && this.player_.tech_ && this.player_.tech_.el_) {\n      this.player_.muted(this.player_.tech_.el_.muted);\n    }\n\n    if (vol === 0 || this.player_.muted()) {\n      level = 0;\n    } else if (vol < 0.33) {\n      level = 1;\n    } else if (vol < 0.67) {\n      level = 2;\n    } // TODO improve muted icon classes\n\n\n    for (var i = 0; i < 4; i++) {\n      removeClass(this.el_, \"vjs-vol-\" + i);\n    }\n\n    addClass(this.el_, \"vjs-vol-\" + level);\n  }\n  /**\n   * If `muted` has changed on the player, update the control text\n   * (`title` attribute on `vjs-mute-control` element and content of\n   * `vjs-control-text` element).\n   *\n   * @private\n   */\n  ;\n\n  _proto.updateControlText_ = function updateControlText_() {\n    var soundOff = this.player_.muted() || this.player_.volume() === 0;\n    var text = soundOff ? 'Unmute' : 'Mute';\n\n    if (this.controlText() !== text) {\n      this.controlText(text);\n    }\n  };\n\n  return MuteToggle;\n}(Button);\n/**\n * The text that should display over the `MuteToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nMuteToggle.prototype.controlText_ = 'Mute';\nComponent.registerComponent('MuteToggle', MuteToggle);\n/**\n * A Component to contain the MuteToggle and VolumeControl so that\n * they can work together.\n *\n * @extends Component\n */\n\nvar VolumePanel =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(VolumePanel, _Component);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n\n\n  function VolumePanel(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (typeof options.inline !== 'undefined') {\n      options.inline = options.inline;\n    } else {\n      options.inline = true;\n    } // pass the inline option down to the VolumeControl as vertical if\n    // the VolumeControl is on.\n\n\n    if (typeof options.volumeControl === 'undefined' || isPlain(options.volumeControl)) {\n      options.volumeControl = options.volumeControl || {};\n      options.volumeControl.vertical = !options.inline;\n    }\n\n    _this = _Component.call(this, player, options) || this;\n\n    _this.on(player, ['loadstart'], _this.volumePanelState_);\n\n    _this.on(_this.muteToggle, 'keyup', _this.handleKeyPress);\n\n    _this.on(_this.volumeControl, 'keyup', _this.handleVolumeControlKeyUp);\n\n    _this.on('keydown', _this.handleKeyPress);\n\n    _this.on('mouseover', _this.handleMouseOver);\n\n    _this.on('mouseout', _this.handleMouseOut); // while the slider is active (the mouse has been pressed down and\n    // is dragging) we do not want to hide the VolumeBar\n\n\n    _this.on(_this.volumeControl, ['slideractive'], _this.sliderActive_);\n\n    _this.on(_this.volumeControl, ['sliderinactive'], _this.sliderInactive_);\n\n    return _this;\n  }\n  /**\n   * Add vjs-slider-active class to the VolumePanel\n   *\n   * @listens VolumeControl#slideractive\n   * @private\n   */\n\n\n  var _proto = VolumePanel.prototype;\n\n  _proto.sliderActive_ = function sliderActive_() {\n    this.addClass('vjs-slider-active');\n  }\n  /**\n   * Removes vjs-slider-active class to the VolumePanel\n   *\n   * @listens VolumeControl#sliderinactive\n   * @private\n   */\n  ;\n\n  _proto.sliderInactive_ = function sliderInactive_() {\n    this.removeClass('vjs-slider-active');\n  }\n  /**\n   * Adds vjs-hidden or vjs-mute-toggle-only to the VolumePanel\n   * depending on MuteToggle and VolumeControl state\n   *\n   * @listens Player#loadstart\n   * @private\n   */\n  ;\n\n  _proto.volumePanelState_ = function volumePanelState_() {\n    // hide volume panel if neither volume control or mute toggle\n    // are displayed\n    if (this.volumeControl.hasClass('vjs-hidden') && this.muteToggle.hasClass('vjs-hidden')) {\n      this.addClass('vjs-hidden');\n    } // if only mute toggle is visible we don't want\n    // volume panel expanding when hovered or active\n\n\n    if (this.volumeControl.hasClass('vjs-hidden') && !this.muteToggle.hasClass('vjs-hidden')) {\n      this.addClass('vjs-mute-toggle-only');\n    }\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    var orientationClass = 'vjs-volume-panel-horizontal';\n\n    if (!this.options_.inline) {\n      orientationClass = 'vjs-volume-panel-vertical';\n    }\n\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: \"vjs-volume-panel vjs-control \" + orientationClass\n    });\n  }\n  /**\n   * Dispose of the `volume-panel` and all child components.\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.handleMouseOut();\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Handles `keyup` events on the `VolumeControl`, looking for ESC, which closes\n   * the volume panel and sets focus on `MuteToggle`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keyup` event that caused this function to be called.\n   *\n   * @listens keyup\n   */\n  ;\n\n  _proto.handleVolumeControlKeyUp = function handleVolumeControlKeyUp(event) {\n    if (keycode.isEventKey(event, 'Esc')) {\n      this.muteToggle.focus();\n    }\n  }\n  /**\n   * This gets called when a `VolumePanel` gains hover via a `mouseover` event.\n   * Turns on listening for `mouseover` event. When they happen it\n   * calls `this.handleMouseOver`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `mouseover` event that caused this function to be called.\n   *\n   * @listens mouseover\n   */\n  ;\n\n  _proto.handleMouseOver = function handleMouseOver(event) {\n    this.addClass('vjs-hover');\n    on(document, 'keyup', bind(this, this.handleKeyPress));\n  }\n  /**\n   * This gets called when a `VolumePanel` gains hover via a `mouseout` event.\n   * Turns on listening for `mouseout` event. When they happen it\n   * calls `this.handleMouseOut`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `mouseout` event that caused this function to be called.\n   *\n   * @listens mouseout\n   */\n  ;\n\n  _proto.handleMouseOut = function handleMouseOut(event) {\n    this.removeClass('vjs-hover');\n    off(document, 'keyup', bind(this, this.handleKeyPress));\n  }\n  /**\n   * Handles `keyup` event on the document or `keydown` event on the `VolumePanel`,\n   * looking for ESC, which hides the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        The keypress that triggered this event.\n   *\n   * @listens keydown | keyup\n   */\n  ;\n\n  _proto.handleKeyPress = function handleKeyPress(event) {\n    if (keycode.isEventKey(event, 'Esc')) {\n      this.handleMouseOut();\n    }\n  };\n\n  return VolumePanel;\n}(Component);\n/**\n * Default options for the `VolumeControl`\n *\n * @type {Object}\n * @private\n */\n\n\nVolumePanel.prototype.options_ = {\n  children: ['muteToggle', 'volumeControl']\n};\nComponent.registerComponent('VolumePanel', VolumePanel);\n/**\n * The Menu component is used to build popup menus, including subtitle and\n * captions selection menus.\n *\n * @extends Component\n */\n\nvar Menu =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(Menu, _Component);\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        the player that this component should attach to\n   *\n   * @param {Object} [options]\n   *        Object of option names and values\n   *\n   */\n\n\n  function Menu(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    if (options) {\n      _this.menuButton_ = options.menuButton;\n    }\n\n    _this.focusedChild_ = -1;\n\n    _this.on('keydown', _this.handleKeyDown); // All the menu item instances share the same blur handler provided by the menu container.\n\n\n    _this.boundHandleBlur_ = bind(_assertThisInitialized(_this), _this.handleBlur);\n    _this.boundHandleTapClick_ = bind(_assertThisInitialized(_this), _this.handleTapClick);\n    return _this;\n  }\n  /**\n   * Add event listeners to the {@link MenuItem}.\n   *\n   * @param {Object} component\n   *        The instance of the `MenuItem` to add listeners to.\n   *\n   */\n\n\n  var _proto = Menu.prototype;\n\n  _proto.addEventListenerForItem = function addEventListenerForItem(component) {\n    if (!(component instanceof Component)) {\n      return;\n    }\n\n    this.on(component, 'blur', this.boundHandleBlur_);\n    this.on(component, ['tap', 'click'], this.boundHandleTapClick_);\n  }\n  /**\n   * Remove event listeners from the {@link MenuItem}.\n   *\n   * @param {Object} component\n   *        The instance of the `MenuItem` to remove listeners.\n   *\n   */\n  ;\n\n  _proto.removeEventListenerForItem = function removeEventListenerForItem(component) {\n    if (!(component instanceof Component)) {\n      return;\n    }\n\n    this.off(component, 'blur', this.boundHandleBlur_);\n    this.off(component, ['tap', 'click'], this.boundHandleTapClick_);\n  }\n  /**\n   * This method will be called indirectly when the component has been added\n   * before the component adds to the new menu instance by `addItem`.\n   * In this case, the original menu instance will remove the component\n   * by calling `removeChild`.\n   *\n   * @param {Object} component\n   *        The instance of the `MenuItem`\n   */\n  ;\n\n  _proto.removeChild = function removeChild(component) {\n    if (typeof component === 'string') {\n      component = this.getChild(component);\n    }\n\n    this.removeEventListenerForItem(component);\n\n    _Component.prototype.removeChild.call(this, component);\n  }\n  /**\n   * Add a {@link MenuItem} to the menu.\n   *\n   * @param {Object|string} component\n   *        The name or instance of the `MenuItem` to add.\n   *\n   */\n  ;\n\n  _proto.addItem = function addItem(component) {\n    var childComponent = this.addChild(component);\n\n    if (childComponent) {\n      this.addEventListenerForItem(childComponent);\n    }\n  }\n  /**\n   * Create the `Menu`s DOM element.\n   *\n   * @return {Element}\n   *         the element that was created\n   */\n  ;\n\n  _proto.createEl = function createEl$1() {\n    var contentElType = this.options_.contentElType || 'ul';\n    this.contentEl_ = createEl(contentElType, {\n      className: 'vjs-menu-content'\n    });\n    this.contentEl_.setAttribute('role', 'menu');\n\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      append: this.contentEl_,\n      className: 'vjs-menu'\n    });\n\n    el.appendChild(this.contentEl_); // Prevent clicks from bubbling up. Needed for Menu Buttons,\n    // where a click on the parent is significant\n\n    on(el, 'click', function (event) {\n      event.preventDefault();\n      event.stopImmediatePropagation();\n    });\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    this.contentEl_ = null;\n    this.boundHandleBlur_ = null;\n    this.boundHandleTapClick_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Called when a `MenuItem` loses focus.\n   *\n   * @param {EventTarget~Event} event\n   *        The `blur` event that caused this function to be called.\n   *\n   * @listens blur\n   */\n  ;\n\n  _proto.handleBlur = function handleBlur(event) {\n    var relatedTarget = event.relatedTarget || document.activeElement; // Close menu popup when a user clicks outside the menu\n\n    if (!this.children().some(function (element) {\n      return element.el() === relatedTarget;\n    })) {\n      var btn = this.menuButton_;\n\n      if (btn && btn.buttonPressed_ && relatedTarget !== btn.el().firstChild) {\n        btn.unpressButton();\n      }\n    }\n  }\n  /**\n   * Called when a `MenuItem` gets clicked or tapped.\n   *\n   * @param {EventTarget~Event} event\n   *        The `click` or `tap` event that caused this function to be called.\n   *\n   * @listens click,tap\n   */\n  ;\n\n  _proto.handleTapClick = function handleTapClick(event) {\n    // Unpress the associated MenuButton, and move focus back to it\n    if (this.menuButton_) {\n      this.menuButton_.unpressButton();\n      var childComponents = this.children();\n\n      if (!Array.isArray(childComponents)) {\n        return;\n      }\n\n      var foundComponent = childComponents.filter(function (component) {\n        return component.el() === event.target;\n      })[0];\n\n      if (!foundComponent) {\n        return;\n      } // don't focus menu button if item is a caption settings item\n      // because focus will move elsewhere\n\n\n      if (foundComponent.name() !== 'CaptionSettingsMenuItem') {\n        this.menuButton_.focus();\n      }\n    }\n  }\n  /**\n   * Handle a `keydown` event on this menu. This listener is added in the constructor.\n   *\n   * @param {EventTarget~Event} event\n   *        A `keydown` event that happened on the menu.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Left and Down Arrows\n    if (keycode.isEventKey(event, 'Left') || keycode.isEventKey(event, 'Down')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.stepForward(); // Up and Right Arrows\n    } else if (keycode.isEventKey(event, 'Right') || keycode.isEventKey(event, 'Up')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.stepBack();\n    }\n  }\n  /**\n   * Move to next (lower) menu item for keyboard users.\n   */\n  ;\n\n  _proto.stepForward = function stepForward() {\n    var stepChild = 0;\n\n    if (this.focusedChild_ !== undefined) {\n      stepChild = this.focusedChild_ + 1;\n    }\n\n    this.focus(stepChild);\n  }\n  /**\n   * Move to previous (higher) menu item for keyboard users.\n   */\n  ;\n\n  _proto.stepBack = function stepBack() {\n    var stepChild = 0;\n\n    if (this.focusedChild_ !== undefined) {\n      stepChild = this.focusedChild_ - 1;\n    }\n\n    this.focus(stepChild);\n  }\n  /**\n   * Set focus on a {@link MenuItem} in the `Menu`.\n   *\n   * @param {Object|string} [item=0]\n   *        Index of child item set focus on.\n   */\n  ;\n\n  _proto.focus = function focus(item) {\n    if (item === void 0) {\n      item = 0;\n    }\n\n    var children = this.children().slice();\n    var haveTitle = children.length && children[0].className && /vjs-menu-title/.test(children[0].className);\n\n    if (haveTitle) {\n      children.shift();\n    }\n\n    if (children.length > 0) {\n      if (item < 0) {\n        item = 0;\n      } else if (item >= children.length) {\n        item = children.length - 1;\n      }\n\n      this.focusedChild_ = item;\n      children[item].el_.focus();\n    }\n  };\n\n  return Menu;\n}(Component);\n\nComponent.registerComponent('Menu', Menu);\n/**\n * A `MenuButton` class for any popup {@link Menu}.\n *\n * @extends Component\n */\n\nvar MenuButton =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(MenuButton, _Component);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n\n\n  function MenuButton(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _Component.call(this, player, options) || this;\n    _this.menuButton_ = new Button(player, options);\n\n    _this.menuButton_.controlText(_this.controlText_);\n\n    _this.menuButton_.el_.setAttribute('aria-haspopup', 'true'); // Add buildCSSClass values to the button, not the wrapper\n\n\n    var buttonClass = Button.prototype.buildCSSClass();\n    _this.menuButton_.el_.className = _this.buildCSSClass() + ' ' + buttonClass;\n\n    _this.menuButton_.removeClass('vjs-control');\n\n    _this.addChild(_this.menuButton_);\n\n    _this.update();\n\n    _this.enabled_ = true;\n\n    _this.on(_this.menuButton_, 'tap', _this.handleClick);\n\n    _this.on(_this.menuButton_, 'click', _this.handleClick);\n\n    _this.on(_this.menuButton_, 'keydown', _this.handleKeyDown);\n\n    _this.on(_this.menuButton_, 'mouseenter', function () {\n      _this.addClass('vjs-hover');\n\n      _this.menu.show();\n\n      on(document, 'keyup', bind(_assertThisInitialized(_this), _this.handleMenuKeyUp));\n    });\n\n    _this.on('mouseleave', _this.handleMouseLeave);\n\n    _this.on('keydown', _this.handleSubmenuKeyDown);\n\n    return _this;\n  }\n  /**\n   * Update the menu based on the current state of its items.\n   */\n\n\n  var _proto = MenuButton.prototype;\n\n  _proto.update = function update() {\n    var menu = this.createMenu();\n\n    if (this.menu) {\n      this.menu.dispose();\n      this.removeChild(this.menu);\n    }\n\n    this.menu = menu;\n    this.addChild(menu);\n    /**\n     * Track the state of the menu button\n     *\n     * @type {Boolean}\n     * @private\n     */\n\n    this.buttonPressed_ = false;\n    this.menuButton_.el_.setAttribute('aria-expanded', 'false');\n\n    if (this.items && this.items.length <= this.hideThreshold_) {\n      this.hide();\n    } else {\n      this.show();\n    }\n  }\n  /**\n   * Create the menu and add all items to it.\n   *\n   * @return {Menu}\n   *         The constructed menu\n   */\n  ;\n\n  _proto.createMenu = function createMenu() {\n    var menu = new Menu(this.player_, {\n      menuButton: this\n    });\n    /**\n     * Hide the menu if the number of items is less than or equal to this threshold. This defaults\n     * to 0 and whenever we add items which can be hidden to the menu we'll increment it. We list\n     * it here because every time we run `createMenu` we need to reset the value.\n     *\n     * @protected\n     * @type {Number}\n     */\n\n    this.hideThreshold_ = 0; // Add a title list item to the top\n\n    if (this.options_.title) {\n      var titleEl = createEl('li', {\n        className: 'vjs-menu-title',\n        innerHTML: toTitleCase(this.options_.title),\n        tabIndex: -1\n      });\n      this.hideThreshold_ += 1;\n      var titleComponent = new Component(this.player_, {\n        el: titleEl\n      });\n      menu.addItem(titleComponent);\n    }\n\n    this.items = this.createItems();\n\n    if (this.items) {\n      // Add menu items to the menu\n      for (var i = 0; i < this.items.length; i++) {\n        menu.addItem(this.items[i]);\n      }\n    }\n\n    return menu;\n  }\n  /**\n   * Create the list of menu items. Specific to each subclass.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.createItems = function createItems() {}\n  /**\n   * Create the `MenuButtons`s DOM element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: this.buildWrapperCSSClass()\n    }, {});\n  }\n  /**\n   * Allow sub components to stack CSS class names for the wrapper element\n   *\n   * @return {string}\n   *         The constructed wrapper DOM `className`\n   */\n  ;\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    var menuButtonClass = 'vjs-menu-button'; // If the inline option is passed, we want to use different styles altogether.\n\n    if (this.options_.inline === true) {\n      menuButtonClass += '-inline';\n    } else {\n      menuButtonClass += '-popup';\n    } // TODO: Fix the CSS so that this isn't necessary\n\n\n    var buttonClass = Button.prototype.buildCSSClass();\n    return \"vjs-menu-button \" + menuButtonClass + \" \" + buttonClass + \" \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    var menuButtonClass = 'vjs-menu-button'; // If the inline option is passed, we want to use different styles altogether.\n\n    if (this.options_.inline === true) {\n      menuButtonClass += '-inline';\n    } else {\n      menuButtonClass += '-popup';\n    }\n\n    return \"vjs-menu-button \" + menuButtonClass + \" \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Get or set the localized control text that will be used for accessibility.\n   *\n   * > NOTE: This will come from the internal `menuButton_` element.\n   *\n   * @param {string} [text]\n   *        Control text for element.\n   *\n   * @param {Element} [el=this.menuButton_.el()]\n   *        Element to set the title on.\n   *\n   * @return {string}\n   *         - The control text when getting\n   */\n  ;\n\n  _proto.controlText = function controlText(text, el) {\n    if (el === void 0) {\n      el = this.menuButton_.el();\n    }\n\n    return this.menuButton_.controlText(text, el);\n  }\n  /**\n   * Dispose of the `menu-button` and all child components.\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.handleMouseLeave();\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Handle a click on a `MenuButton`.\n   * See {@link ClickableComponent#handleClick} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    if (this.buttonPressed_) {\n      this.unpressButton();\n    } else {\n      this.pressButton();\n    }\n  }\n  /**\n   * Handle `mouseleave` for `MenuButton`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `mouseleave` event that caused this function to be called.\n   *\n   * @listens mouseleave\n   */\n  ;\n\n  _proto.handleMouseLeave = function handleMouseLeave(event) {\n    this.removeClass('vjs-hover');\n    off(document, 'keyup', bind(this, this.handleMenuKeyUp));\n  }\n  /**\n   * Set the focus to the actual button, not to this element\n   */\n  ;\n\n  _proto.focus = function focus() {\n    this.menuButton_.focus();\n  }\n  /**\n   * Remove the focus from the actual button, not this element\n   */\n  ;\n\n  _proto.blur = function blur() {\n    this.menuButton_.blur();\n  }\n  /**\n   * Handle tab, escape, down arrow, and up arrow keys for `MenuButton`. See\n   * {@link ClickableComponent#handleKeyDown} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Escape or Tab unpress the 'button'\n    if (keycode.isEventKey(event, 'Esc') || keycode.isEventKey(event, 'Tab')) {\n      if (this.buttonPressed_) {\n        this.unpressButton();\n      } // Don't preventDefault for Tab key - we still want to lose focus\n\n\n      if (!keycode.isEventKey(event, 'Tab')) {\n        event.preventDefault(); // Set focus back to the menu button's button\n\n        this.menuButton_.focus();\n      } // Up Arrow or Down Arrow also 'press' the button to open the menu\n\n    } else if (keycode.isEventKey(event, 'Up') || keycode.isEventKey(event, 'Down')) {\n      if (!this.buttonPressed_) {\n        event.preventDefault();\n        this.pressButton();\n      }\n    }\n  }\n  /**\n   * Handle a `keyup` event on a `MenuButton`. The listener for this is added in\n   * the constructor.\n   *\n   * @param {EventTarget~Event} event\n   *        Key press event\n   *\n   * @listens keyup\n   */\n  ;\n\n  _proto.handleMenuKeyUp = function handleMenuKeyUp(event) {\n    // Escape hides popup menu\n    if (keycode.isEventKey(event, 'Esc') || keycode.isEventKey(event, 'Tab')) {\n      this.removeClass('vjs-hover');\n    }\n  }\n  /**\n   * This method name now delegates to `handleSubmenuKeyDown`. This means\n   * anyone calling `handleSubmenuKeyPress` will not see their method calls\n   * stop working.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleSubmenuKeyPress = function handleSubmenuKeyPress(event) {\n    this.handleSubmenuKeyDown(event);\n  }\n  /**\n   * Handle a `keydown` event on a sub-menu. The listener for this is added in\n   * the constructor.\n   *\n   * @param {EventTarget~Event} event\n   *        Key press event\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleSubmenuKeyDown = function handleSubmenuKeyDown(event) {\n    // Escape or Tab unpress the 'button'\n    if (keycode.isEventKey(event, 'Esc') || keycode.isEventKey(event, 'Tab')) {\n      if (this.buttonPressed_) {\n        this.unpressButton();\n      } // Don't preventDefault for Tab key - we still want to lose focus\n\n\n      if (!keycode.isEventKey(event, 'Tab')) {\n        event.preventDefault(); // Set focus back to the menu button's button\n\n        this.menuButton_.focus();\n      }\n    }\n  }\n  /**\n   * Put the current `MenuButton` into a pressed state.\n   */\n  ;\n\n  _proto.pressButton = function pressButton() {\n    if (this.enabled_) {\n      this.buttonPressed_ = true;\n      this.menu.show();\n      this.menu.lockShowing();\n      this.menuButton_.el_.setAttribute('aria-expanded', 'true'); // set the focus into the submenu, except on iOS where it is resulting in\n      // undesired scrolling behavior when the player is in an iframe\n\n      if (IS_IOS && isInFrame()) {\n        // Return early so that the menu isn't focused\n        return;\n      }\n\n      this.menu.focus();\n    }\n  }\n  /**\n   * Take the current `MenuButton` out of a pressed state.\n   */\n  ;\n\n  _proto.unpressButton = function unpressButton() {\n    if (this.enabled_) {\n      this.buttonPressed_ = false;\n      this.menu.unlockShowing();\n      this.menu.hide();\n      this.menuButton_.el_.setAttribute('aria-expanded', 'false');\n    }\n  }\n  /**\n   * Disable the `MenuButton`. Don't allow it to be clicked.\n   */\n  ;\n\n  _proto.disable = function disable() {\n    this.unpressButton();\n    this.enabled_ = false;\n    this.addClass('vjs-disabled');\n    this.menuButton_.disable();\n  }\n  /**\n   * Enable the `MenuButton`. Allow it to be clicked.\n   */\n  ;\n\n  _proto.enable = function enable() {\n    this.enabled_ = true;\n    this.removeClass('vjs-disabled');\n    this.menuButton_.enable();\n  };\n\n  return MenuButton;\n}(Component);\n\nComponent.registerComponent('MenuButton', MenuButton);\n/**\n * The base class for buttons that toggle specific  track types (e.g. subtitles).\n *\n * @extends MenuButton\n */\n\nvar TrackButton =\n/*#__PURE__*/\nfunction (_MenuButton) {\n  _inheritsLoose(TrackButton, _MenuButton);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function TrackButton(player, options) {\n    var _this;\n\n    var tracks = options.tracks;\n    _this = _MenuButton.call(this, player, options) || this;\n\n    if (_this.items.length <= 1) {\n      _this.hide();\n    }\n\n    if (!tracks) {\n      return _assertThisInitialized(_this);\n    }\n\n    var updateHandler = bind(_assertThisInitialized(_this), _this.update);\n    tracks.addEventListener('removetrack', updateHandler);\n    tracks.addEventListener('addtrack', updateHandler);\n\n    _this.player_.on('ready', updateHandler);\n\n    _this.player_.on('dispose', function () {\n      tracks.removeEventListener('removetrack', updateHandler);\n      tracks.removeEventListener('addtrack', updateHandler);\n    });\n\n    return _this;\n  }\n\n  return TrackButton;\n}(MenuButton);\n\nComponent.registerComponent('TrackButton', TrackButton);\n/**\n * @file menu-keys.js\n */\n\n/**\n  * All keys used for operation of a menu (`MenuButton`, `Menu`, and `MenuItem`)\n  * Note that 'Enter' and 'Space' are not included here (otherwise they would\n  * prevent the `MenuButton` and `MenuItem` from being keyboard-clickable)\n  * @typedef MenuKeys\n  * @array\n  */\n\nvar MenuKeys = ['Tab', 'Esc', 'Up', 'Down', 'Right', 'Left'];\n/**\n * The component for a menu item. `<li>`\n *\n * @extends ClickableComponent\n */\n\nvar MenuItem =\n/*#__PURE__*/\nfunction (_ClickableComponent) {\n  _inheritsLoose(MenuItem, _ClickableComponent);\n  /**\n   * Creates an instance of the this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   *\n   */\n\n\n  function MenuItem(player, options) {\n    var _this;\n\n    _this = _ClickableComponent.call(this, player, options) || this;\n    _this.selectable = options.selectable;\n    _this.isSelected_ = options.selected || false;\n    _this.multiSelectable = options.multiSelectable;\n\n    _this.selected(_this.isSelected_);\n\n    if (_this.selectable) {\n      if (_this.multiSelectable) {\n        _this.el_.setAttribute('role', 'menuitemcheckbox');\n      } else {\n        _this.el_.setAttribute('role', 'menuitemradio');\n      }\n    } else {\n      _this.el_.setAttribute('role', 'menuitem');\n    }\n\n    return _this;\n  }\n  /**\n   * Create the `MenuItem's DOM element\n   *\n   * @param {string} [type=li]\n   *        Element's node type, not actually used, always set to `li`.\n   *\n   * @param {Object} [props={}]\n   *        An object of properties that should be set on the element\n   *\n   * @param {Object} [attrs={}]\n   *        An object of attributes that should be set on the element\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  var _proto = MenuItem.prototype;\n\n  _proto.createEl = function createEl(type, props, attrs) {\n    // The control is textual, not just an icon\n    this.nonIconControl = true;\n    return _ClickableComponent.prototype.createEl.call(this, 'li', assign({\n      className: 'vjs-menu-item',\n      innerHTML: \"<span class=\\\"vjs-menu-item-text\\\">\" + this.localize(this.options_.label) + \"</span>\",\n      tabIndex: -1\n    }, props), attrs);\n  }\n  /**\n   * Ignore keys which are used by the menu, but pass any other ones up. See\n   * {@link ClickableComponent#handleKeyDown} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    if (!MenuKeys.some(function (key) {\n      return keycode.isEventKey(event, key);\n    })) {\n      // Pass keydown handling up for unused keys\n      _ClickableComponent.prototype.handleKeyDown.call(this, event);\n    }\n  }\n  /**\n   * Any click on a `MenuItem` puts it into the selected state.\n   * See {@link ClickableComponent#handleClick} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    this.selected(true);\n  }\n  /**\n   * Set the state for this menu item as selected or not.\n   *\n   * @param {boolean} selected\n   *        if the menu item is selected or not\n   */\n  ;\n\n  _proto.selected = function selected(_selected) {\n    if (this.selectable) {\n      if (_selected) {\n        this.addClass('vjs-selected');\n        this.el_.setAttribute('aria-checked', 'true'); // aria-checked isn't fully supported by browsers/screen readers,\n        // so indicate selected state to screen reader in the control text.\n\n        this.controlText(', selected');\n        this.isSelected_ = true;\n      } else {\n        this.removeClass('vjs-selected');\n        this.el_.setAttribute('aria-checked', 'false'); // Indicate un-selected state to screen reader\n\n        this.controlText('');\n        this.isSelected_ = false;\n      }\n    }\n  };\n\n  return MenuItem;\n}(ClickableComponent);\n\nComponent.registerComponent('MenuItem', MenuItem);\n/**\n * The specific menu item type for selecting a language within a text track kind\n *\n * @extends MenuItem\n */\n\nvar TextTrackMenuItem =\n/*#__PURE__*/\nfunction (_MenuItem) {\n  _inheritsLoose(TextTrackMenuItem, _MenuItem);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function TextTrackMenuItem(player, options) {\n    var _this;\n\n    var track = options.track;\n    var tracks = player.textTracks(); // Modify options for parent MenuItem class's init.\n\n    options.label = track.label || track.language || 'Unknown';\n    options.selected = track.mode === 'showing';\n    _this = _MenuItem.call(this, player, options) || this;\n    _this.track = track; // Determine the relevant kind(s) of tracks for this component and filter\n    // out empty kinds.\n\n    _this.kinds = (options.kinds || [options.kind || _this.track.kind]).filter(Boolean);\n\n    var changeHandler = function changeHandler() {\n      for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      _this.handleTracksChange.apply(_assertThisInitialized(_this), args);\n    };\n\n    var selectedLanguageChangeHandler = function selectedLanguageChangeHandler() {\n      for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n        args[_key2] = arguments[_key2];\n      }\n\n      _this.handleSelectedLanguageChange.apply(_assertThisInitialized(_this), args);\n    };\n\n    player.on(['loadstart', 'texttrackchange'], changeHandler);\n    tracks.addEventListener('change', changeHandler);\n    tracks.addEventListener('selectedlanguagechange', selectedLanguageChangeHandler);\n\n    _this.on('dispose', function () {\n      player.off(['loadstart', 'texttrackchange'], changeHandler);\n      tracks.removeEventListener('change', changeHandler);\n      tracks.removeEventListener('selectedlanguagechange', selectedLanguageChangeHandler);\n    }); // iOS7 doesn't dispatch change events to TextTrackLists when an\n    // associated track's mode changes. Without something like\n    // Object.observe() (also not present on iOS7), it's not\n    // possible to detect changes to the mode attribute and polyfill\n    // the change event. As a poor substitute, we manually dispatch\n    // change events whenever the controls modify the mode.\n\n\n    if (tracks.onchange === undefined) {\n      var event;\n\n      _this.on(['tap', 'click'], function () {\n        if (typeof window$1.Event !== 'object') {\n          // Android 2.3 throws an Illegal Constructor error for window.Event\n          try {\n            event = new window$1.Event('change');\n          } catch (err) {// continue regardless of error\n          }\n        }\n\n        if (!event) {\n          event = document.createEvent('Event');\n          event.initEvent('change', true, true);\n        }\n\n        tracks.dispatchEvent(event);\n      });\n    } // set the default state based on current tracks\n\n\n    _this.handleTracksChange();\n\n    return _this;\n  }\n  /**\n   * This gets called when an `TextTrackMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  var _proto = TextTrackMenuItem.prototype;\n\n  _proto.handleClick = function handleClick(event) {\n    var referenceTrack = this.track;\n    var tracks = this.player_.textTracks();\n\n    _MenuItem.prototype.handleClick.call(this, event);\n\n    if (!tracks) {\n      return;\n    }\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i]; // If the track from the text tracks list is not of the right kind,\n      // skip it. We do not want to affect tracks of incompatible kind(s).\n\n      if (this.kinds.indexOf(track.kind) === -1) {\n        continue;\n      } // If this text track is the component's track and it is not showing,\n      // set it to showing.\n\n\n      if (track === referenceTrack) {\n        if (track.mode !== 'showing') {\n          track.mode = 'showing';\n        } // If this text track is not the component's track and it is not\n        // disabled, set it to disabled.\n\n      } else if (track.mode !== 'disabled') {\n        track.mode = 'disabled';\n      }\n    }\n  }\n  /**\n   * Handle text track list change\n   *\n   * @param {EventTarget~Event} event\n   *        The `change` event that caused this function to be called.\n   *\n   * @listens TextTrackList#change\n   */\n  ;\n\n  _proto.handleTracksChange = function handleTracksChange(event) {\n    var shouldBeSelected = this.track.mode === 'showing'; // Prevent redundant selected() calls because they may cause\n    // screen readers to read the appended control text unnecessarily\n\n    if (shouldBeSelected !== this.isSelected_) {\n      this.selected(shouldBeSelected);\n    }\n  };\n\n  _proto.handleSelectedLanguageChange = function handleSelectedLanguageChange(event) {\n    if (this.track.mode === 'showing') {\n      var selectedLanguage = this.player_.cache_.selectedLanguage; // Don't replace the kind of track across the same language\n\n      if (selectedLanguage && selectedLanguage.enabled && selectedLanguage.language === this.track.language && selectedLanguage.kind !== this.track.kind) {\n        return;\n      }\n\n      this.player_.cache_.selectedLanguage = {\n        enabled: true,\n        language: this.track.language,\n        kind: this.track.kind\n      };\n    }\n  };\n\n  _proto.dispose = function dispose() {\n    // remove reference to track object on dispose\n    this.track = null;\n\n    _MenuItem.prototype.dispose.call(this);\n  };\n\n  return TextTrackMenuItem;\n}(MenuItem);\n\nComponent.registerComponent('TextTrackMenuItem', TextTrackMenuItem);\n/**\n * A special menu item for turning of a specific type of text track\n *\n * @extends TextTrackMenuItem\n */\n\nvar OffTextTrackMenuItem =\n/*#__PURE__*/\nfunction (_TextTrackMenuItem) {\n  _inheritsLoose(OffTextTrackMenuItem, _TextTrackMenuItem);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function OffTextTrackMenuItem(player, options) {\n    // Create pseudo track info\n    // Requires options['kind']\n    options.track = {\n      player: player,\n      // it is no longer necessary to store `kind` or `kinds` on the track itself\n      // since they are now stored in the `kinds` property of all instances of\n      // TextTrackMenuItem, but this will remain for backwards compatibility\n      kind: options.kind,\n      kinds: options.kinds,\n      \"default\": false,\n      mode: 'disabled'\n    };\n\n    if (!options.kinds) {\n      options.kinds = [options.kind];\n    }\n\n    if (options.label) {\n      options.track.label = options.label;\n    } else {\n      options.track.label = options.kinds.join(' and ') + ' off';\n    } // MenuItem is selectable\n\n\n    options.selectable = true; // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n\n    options.multiSelectable = false;\n    return _TextTrackMenuItem.call(this, player, options) || this;\n  }\n  /**\n   * Handle text track change\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run\n   */\n\n\n  var _proto = OffTextTrackMenuItem.prototype;\n\n  _proto.handleTracksChange = function handleTracksChange(event) {\n    var tracks = this.player().textTracks();\n    var shouldBeSelected = true;\n\n    for (var i = 0, l = tracks.length; i < l; i++) {\n      var track = tracks[i];\n\n      if (this.options_.kinds.indexOf(track.kind) > -1 && track.mode === 'showing') {\n        shouldBeSelected = false;\n        break;\n      }\n    } // Prevent redundant selected() calls because they may cause\n    // screen readers to read the appended control text unnecessarily\n\n\n    if (shouldBeSelected !== this.isSelected_) {\n      this.selected(shouldBeSelected);\n    }\n  };\n\n  _proto.handleSelectedLanguageChange = function handleSelectedLanguageChange(event) {\n    var tracks = this.player().textTracks();\n    var allHidden = true;\n\n    for (var i = 0, l = tracks.length; i < l; i++) {\n      var track = tracks[i];\n\n      if (['captions', 'descriptions', 'subtitles'].indexOf(track.kind) > -1 && track.mode === 'showing') {\n        allHidden = false;\n        break;\n      }\n    }\n\n    if (allHidden) {\n      this.player_.cache_.selectedLanguage = {\n        enabled: false\n      };\n    }\n  };\n\n  return OffTextTrackMenuItem;\n}(TextTrackMenuItem);\n\nComponent.registerComponent('OffTextTrackMenuItem', OffTextTrackMenuItem);\n/**\n * The base class for buttons that toggle specific text track types (e.g. subtitles)\n *\n * @extends MenuButton\n */\n\nvar TextTrackButton =\n/*#__PURE__*/\nfunction (_TrackButton) {\n  _inheritsLoose(TextTrackButton, _TrackButton);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n\n\n  function TextTrackButton(player, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    options.tracks = player.textTracks();\n    return _TrackButton.call(this, player, options) || this;\n  }\n  /**\n   * Create a menu item for each text track\n   *\n   * @param {TextTrackMenuItem[]} [items=[]]\n   *        Existing array of items to use during creation\n   *\n   * @return {TextTrackMenuItem[]}\n   *         Array of menu items that were created\n   */\n\n\n  var _proto = TextTrackButton.prototype;\n\n  _proto.createItems = function createItems(items, TrackMenuItem) {\n    if (items === void 0) {\n      items = [];\n    }\n\n    if (TrackMenuItem === void 0) {\n      TrackMenuItem = TextTrackMenuItem;\n    } // Label is an override for the [track] off label\n    // USed to localise captions/subtitles\n\n\n    var label;\n\n    if (this.label_) {\n      label = this.label_ + \" off\";\n    } // Add an OFF menu item to turn all tracks off\n\n\n    items.push(new OffTextTrackMenuItem(this.player_, {\n      kinds: this.kinds_,\n      kind: this.kind_,\n      label: label\n    }));\n    this.hideThreshold_ += 1;\n    var tracks = this.player_.textTracks();\n\n    if (!Array.isArray(this.kinds_)) {\n      this.kinds_ = [this.kind_];\n    }\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i]; // only add tracks that are of an appropriate kind and have a label\n\n      if (this.kinds_.indexOf(track.kind) > -1) {\n        var item = new TrackMenuItem(this.player_, {\n          track: track,\n          kinds: this.kinds_,\n          kind: this.kind_,\n          // MenuItem is selectable\n          selectable: true,\n          // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n          multiSelectable: false\n        });\n        item.addClass(\"vjs-\" + track.kind + \"-menu-item\");\n        items.push(item);\n      }\n    }\n\n    return items;\n  };\n\n  return TextTrackButton;\n}(TrackButton);\n\nComponent.registerComponent('TextTrackButton', TextTrackButton);\n/**\n * The chapter track menu item\n *\n * @extends MenuItem\n */\n\nvar ChaptersTrackMenuItem =\n/*#__PURE__*/\nfunction (_MenuItem) {\n  _inheritsLoose(ChaptersTrackMenuItem, _MenuItem);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function ChaptersTrackMenuItem(player, options) {\n    var _this;\n\n    var track = options.track;\n    var cue = options.cue;\n    var currentTime = player.currentTime(); // Modify options for parent MenuItem class's init.\n\n    options.selectable = true;\n    options.multiSelectable = false;\n    options.label = cue.text;\n    options.selected = cue.startTime <= currentTime && currentTime < cue.endTime;\n    _this = _MenuItem.call(this, player, options) || this;\n    _this.track = track;\n    _this.cue = cue;\n    track.addEventListener('cuechange', bind(_assertThisInitialized(_this), _this.update));\n    return _this;\n  }\n  /**\n   * This gets called when an `ChaptersTrackMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  var _proto = ChaptersTrackMenuItem.prototype;\n\n  _proto.handleClick = function handleClick(event) {\n    _MenuItem.prototype.handleClick.call(this);\n\n    this.player_.currentTime(this.cue.startTime);\n    this.update(this.cue.startTime);\n  }\n  /**\n   * Update chapter menu item\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `cuechange` event that caused this function to run.\n   *\n   * @listens TextTrack#cuechange\n   */\n  ;\n\n  _proto.update = function update(event) {\n    var cue = this.cue;\n    var currentTime = this.player_.currentTime(); // vjs.log(currentTime, cue.startTime);\n\n    this.selected(cue.startTime <= currentTime && currentTime < cue.endTime);\n  };\n\n  return ChaptersTrackMenuItem;\n}(MenuItem);\n\nComponent.registerComponent('ChaptersTrackMenuItem', ChaptersTrackMenuItem);\n/**\n * The button component for toggling and selecting chapters\n * Chapters act much differently than other text tracks\n * Cues are navigation vs. other tracks of alternative languages\n *\n * @extends TextTrackButton\n */\n\nvar ChaptersButton =\n/*#__PURE__*/\nfunction (_TextTrackButton) {\n  _inheritsLoose(ChaptersButton, _TextTrackButton);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this function is ready.\n   */\n\n\n  function ChaptersButton(player, options, ready) {\n    return _TextTrackButton.call(this, player, options, ready) || this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = ChaptersButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-chapters-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-chapters-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Update the menu based on the current state of its items.\n   *\n   * @param {EventTarget~Event} [event]\n   *        An event that triggered this function to run.\n   *\n   * @listens TextTrackList#addtrack\n   * @listens TextTrackList#removetrack\n   * @listens TextTrackList#change\n   */\n  ;\n\n  _proto.update = function update(event) {\n    if (!this.track_ || event && (event.type === 'addtrack' || event.type === 'removetrack')) {\n      this.setTrack(this.findChaptersTrack());\n    }\n\n    _TextTrackButton.prototype.update.call(this);\n  }\n  /**\n   * Set the currently selected track for the chapters button.\n   *\n   * @param {TextTrack} track\n   *        The new track to select. Nothing will change if this is the currently selected\n   *        track.\n   */\n  ;\n\n  _proto.setTrack = function setTrack(track) {\n    if (this.track_ === track) {\n      return;\n    }\n\n    if (!this.updateHandler_) {\n      this.updateHandler_ = this.update.bind(this);\n    } // here this.track_ refers to the old track instance\n\n\n    if (this.track_) {\n      var remoteTextTrackEl = this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_);\n\n      if (remoteTextTrackEl) {\n        remoteTextTrackEl.removeEventListener('load', this.updateHandler_);\n      }\n\n      this.track_ = null;\n    }\n\n    this.track_ = track; // here this.track_ refers to the new track instance\n\n    if (this.track_) {\n      this.track_.mode = 'hidden';\n\n      var _remoteTextTrackEl = this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_);\n\n      if (_remoteTextTrackEl) {\n        _remoteTextTrackEl.addEventListener('load', this.updateHandler_);\n      }\n    }\n  }\n  /**\n   * Find the track object that is currently in use by this ChaptersButton\n   *\n   * @return {TextTrack|undefined}\n   *         The current track or undefined if none was found.\n   */\n  ;\n\n  _proto.findChaptersTrack = function findChaptersTrack() {\n    var tracks = this.player_.textTracks() || [];\n\n    for (var i = tracks.length - 1; i >= 0; i--) {\n      // We will always choose the last track as our chaptersTrack\n      var track = tracks[i];\n\n      if (track.kind === this.kind_) {\n        return track;\n      }\n    }\n  }\n  /**\n   * Get the caption for the ChaptersButton based on the track label. This will also\n   * use the current tracks localized kind as a fallback if a label does not exist.\n   *\n   * @return {string}\n   *         The tracks current label or the localized track kind.\n   */\n  ;\n\n  _proto.getMenuCaption = function getMenuCaption() {\n    if (this.track_ && this.track_.label) {\n      return this.track_.label;\n    }\n\n    return this.localize(toTitleCase(this.kind_));\n  }\n  /**\n   * Create menu from chapter track\n   *\n   * @return {Menu}\n   *         New menu for the chapter buttons\n   */\n  ;\n\n  _proto.createMenu = function createMenu() {\n    this.options_.title = this.getMenuCaption();\n    return _TextTrackButton.prototype.createMenu.call(this);\n  }\n  /**\n   * Create a menu item for each text track\n   *\n   * @return {TextTrackMenuItem[]}\n   *         Array of menu items\n   */\n  ;\n\n  _proto.createItems = function createItems() {\n    var items = [];\n\n    if (!this.track_) {\n      return items;\n    }\n\n    var cues = this.track_.cues;\n\n    if (!cues) {\n      return items;\n    }\n\n    for (var i = 0, l = cues.length; i < l; i++) {\n      var cue = cues[i];\n      var mi = new ChaptersTrackMenuItem(this.player_, {\n        track: this.track_,\n        cue: cue\n      });\n      items.push(mi);\n    }\n\n    return items;\n  };\n\n  return ChaptersButton;\n}(TextTrackButton);\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nChaptersButton.prototype.kind_ = 'chapters';\n/**\n * The text that should display over the `ChaptersButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\nChaptersButton.prototype.controlText_ = 'Chapters';\nComponent.registerComponent('ChaptersButton', ChaptersButton);\n/**\n * The button component for toggling and selecting descriptions\n *\n * @extends TextTrackButton\n */\n\nvar DescriptionsButton =\n/*#__PURE__*/\nfunction (_TextTrackButton) {\n  _inheritsLoose(DescriptionsButton, _TextTrackButton);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this component is ready.\n   */\n\n\n  function DescriptionsButton(player, options, ready) {\n    var _this;\n\n    _this = _TextTrackButton.call(this, player, options, ready) || this;\n    var tracks = player.textTracks();\n    var changeHandler = bind(_assertThisInitialized(_this), _this.handleTracksChange);\n    tracks.addEventListener('change', changeHandler);\n\n    _this.on('dispose', function () {\n      tracks.removeEventListener('change', changeHandler);\n    });\n\n    return _this;\n  }\n  /**\n   * Handle text track change\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run\n   *\n   * @listens TextTrackList#change\n   */\n\n\n  var _proto = DescriptionsButton.prototype;\n\n  _proto.handleTracksChange = function handleTracksChange(event) {\n    var tracks = this.player().textTracks();\n    var disabled = false; // Check whether a track of a different kind is showing\n\n    for (var i = 0, l = tracks.length; i < l; i++) {\n      var track = tracks[i];\n\n      if (track.kind !== this.kind_ && track.mode === 'showing') {\n        disabled = true;\n        break;\n      }\n    } // If another track is showing, disable this menu button\n\n\n    if (disabled) {\n      this.disable();\n    } else {\n      this.enable();\n    }\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-descriptions-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-descriptions-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  return DescriptionsButton;\n}(TextTrackButton);\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nDescriptionsButton.prototype.kind_ = 'descriptions';\n/**\n * The text that should display over the `DescriptionsButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\nDescriptionsButton.prototype.controlText_ = 'Descriptions';\nComponent.registerComponent('DescriptionsButton', DescriptionsButton);\n/**\n * The button component for toggling and selecting subtitles\n *\n * @extends TextTrackButton\n */\n\nvar SubtitlesButton =\n/*#__PURE__*/\nfunction (_TextTrackButton) {\n  _inheritsLoose(SubtitlesButton, _TextTrackButton);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this component is ready.\n   */\n\n\n  function SubtitlesButton(player, options, ready) {\n    return _TextTrackButton.call(this, player, options, ready) || this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = SubtitlesButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-subtitles-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-subtitles-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  return SubtitlesButton;\n}(TextTrackButton);\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nSubtitlesButton.prototype.kind_ = 'subtitles';\n/**\n * The text that should display over the `SubtitlesButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\nSubtitlesButton.prototype.controlText_ = 'Subtitles';\nComponent.registerComponent('SubtitlesButton', SubtitlesButton);\n/**\n * The menu item for caption track settings menu\n *\n * @extends TextTrackMenuItem\n */\n\nvar CaptionSettingsMenuItem =\n/*#__PURE__*/\nfunction (_TextTrackMenuItem) {\n  _inheritsLoose(CaptionSettingsMenuItem, _TextTrackMenuItem);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function CaptionSettingsMenuItem(player, options) {\n    var _this;\n\n    options.track = {\n      player: player,\n      kind: options.kind,\n      label: options.kind + ' settings',\n      selectable: false,\n      \"default\": false,\n      mode: 'disabled'\n    }; // CaptionSettingsMenuItem has no concept of 'selected'\n\n    options.selectable = false;\n    options.name = 'CaptionSettingsMenuItem';\n    _this = _TextTrackMenuItem.call(this, player, options) || this;\n\n    _this.addClass('vjs-texttrack-settings');\n\n    _this.controlText(', opens ' + options.kind + ' settings dialog');\n\n    return _this;\n  }\n  /**\n   * This gets called when an `CaptionSettingsMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  var _proto = CaptionSettingsMenuItem.prototype;\n\n  _proto.handleClick = function handleClick(event) {\n    this.player().getChild('textTrackSettings').open();\n  };\n\n  return CaptionSettingsMenuItem;\n}(TextTrackMenuItem);\n\nComponent.registerComponent('CaptionSettingsMenuItem', CaptionSettingsMenuItem);\n/**\n * The button component for toggling and selecting captions\n *\n * @extends TextTrackButton\n */\n\nvar CaptionsButton =\n/*#__PURE__*/\nfunction (_TextTrackButton) {\n  _inheritsLoose(CaptionsButton, _TextTrackButton);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this component is ready.\n   */\n\n\n  function CaptionsButton(player, options, ready) {\n    return _TextTrackButton.call(this, player, options, ready) || this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = CaptionsButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-captions-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-captions-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Create caption menu items\n   *\n   * @return {CaptionSettingsMenuItem[]}\n   *         The array of current menu items.\n   */\n  ;\n\n  _proto.createItems = function createItems() {\n    var items = [];\n\n    if (!(this.player().tech_ && this.player().tech_.featuresNativeTextTracks) && this.player().getChild('textTrackSettings')) {\n      items.push(new CaptionSettingsMenuItem(this.player_, {\n        kind: this.kind_\n      }));\n      this.hideThreshold_ += 1;\n    }\n\n    return _TextTrackButton.prototype.createItems.call(this, items);\n  };\n\n  return CaptionsButton;\n}(TextTrackButton);\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nCaptionsButton.prototype.kind_ = 'captions';\n/**\n * The text that should display over the `CaptionsButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\nCaptionsButton.prototype.controlText_ = 'Captions';\nComponent.registerComponent('CaptionsButton', CaptionsButton);\n/**\n * SubsCapsMenuItem has an [cc] icon to distinguish captions from subtitles\n * in the SubsCapsMenu.\n *\n * @extends TextTrackMenuItem\n */\n\nvar SubsCapsMenuItem =\n/*#__PURE__*/\nfunction (_TextTrackMenuItem) {\n  _inheritsLoose(SubsCapsMenuItem, _TextTrackMenuItem);\n\n  function SubsCapsMenuItem() {\n    return _TextTrackMenuItem.apply(this, arguments) || this;\n  }\n\n  var _proto = SubsCapsMenuItem.prototype;\n\n  _proto.createEl = function createEl(type, props, attrs) {\n    var innerHTML = \"<span class=\\\"vjs-menu-item-text\\\">\" + this.localize(this.options_.label);\n\n    if (this.options_.track.kind === 'captions') {\n      innerHTML += \"\\n        <span aria-hidden=\\\"true\\\" class=\\\"vjs-icon-placeholder\\\"></span>\\n        <span class=\\\"vjs-control-text\\\"> \" + this.localize('Captions') + \"</span>\\n      \";\n    }\n\n    innerHTML += '</span>';\n\n    var el = _TextTrackMenuItem.prototype.createEl.call(this, type, assign({\n      innerHTML: innerHTML\n    }, props), attrs);\n\n    return el;\n  };\n\n  return SubsCapsMenuItem;\n}(TextTrackMenuItem);\n\nComponent.registerComponent('SubsCapsMenuItem', SubsCapsMenuItem);\n/**\n * The button component for toggling and selecting captions and/or subtitles\n *\n * @extends TextTrackButton\n */\n\nvar SubsCapsButton =\n/*#__PURE__*/\nfunction (_TextTrackButton) {\n  _inheritsLoose(SubsCapsButton, _TextTrackButton);\n\n  function SubsCapsButton(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _TextTrackButton.call(this, player, options) || this; // Although North America uses \"captions\" in most cases for\n    // \"captions and subtitles\" other locales use \"subtitles\"\n\n    _this.label_ = 'subtitles';\n\n    if (['en', 'en-us', 'en-ca', 'fr-ca'].indexOf(_this.player_.language_) > -1) {\n      _this.label_ = 'captions';\n    }\n\n    _this.menuButton_.controlText(toTitleCase(_this.label_));\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = SubsCapsButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-subs-caps-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-subs-caps-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Create caption/subtitles menu items\n   *\n   * @return {CaptionSettingsMenuItem[]}\n   *         The array of current menu items.\n   */\n  ;\n\n  _proto.createItems = function createItems() {\n    var items = [];\n\n    if (!(this.player().tech_ && this.player().tech_.featuresNativeTextTracks) && this.player().getChild('textTrackSettings')) {\n      items.push(new CaptionSettingsMenuItem(this.player_, {\n        kind: this.label_\n      }));\n      this.hideThreshold_ += 1;\n    }\n\n    items = _TextTrackButton.prototype.createItems.call(this, items, SubsCapsMenuItem);\n    return items;\n  };\n\n  return SubsCapsButton;\n}(TextTrackButton);\n/**\n * `kind`s of TextTrack to look for to associate it with this menu.\n *\n * @type {array}\n * @private\n */\n\n\nSubsCapsButton.prototype.kinds_ = ['captions', 'subtitles'];\n/**\n * The text that should display over the `SubsCapsButton`s controls.\n *\n *\n * @type {string}\n * @private\n */\n\nSubsCapsButton.prototype.controlText_ = 'Subtitles';\nComponent.registerComponent('SubsCapsButton', SubsCapsButton);\n/**\n * An {@link AudioTrack} {@link MenuItem}\n *\n * @extends MenuItem\n */\n\nvar AudioTrackMenuItem =\n/*#__PURE__*/\nfunction (_MenuItem) {\n  _inheritsLoose(AudioTrackMenuItem, _MenuItem);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function AudioTrackMenuItem(player, options) {\n    var _this;\n\n    var track = options.track;\n    var tracks = player.audioTracks(); // Modify options for parent MenuItem class's init.\n\n    options.label = track.label || track.language || 'Unknown';\n    options.selected = track.enabled;\n    _this = _MenuItem.call(this, player, options) || this;\n    _this.track = track;\n\n    _this.addClass(\"vjs-\" + track.kind + \"-menu-item\");\n\n    var changeHandler = function changeHandler() {\n      for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      _this.handleTracksChange.apply(_assertThisInitialized(_this), args);\n    };\n\n    tracks.addEventListener('change', changeHandler);\n\n    _this.on('dispose', function () {\n      tracks.removeEventListener('change', changeHandler);\n    });\n\n    return _this;\n  }\n\n  var _proto = AudioTrackMenuItem.prototype;\n\n  _proto.createEl = function createEl(type, props, attrs) {\n    var innerHTML = \"<span class=\\\"vjs-menu-item-text\\\">\" + this.localize(this.options_.label);\n\n    if (this.options_.track.kind === 'main-desc') {\n      innerHTML += \"\\n        <span aria-hidden=\\\"true\\\" class=\\\"vjs-icon-placeholder\\\"></span>\\n        <span class=\\\"vjs-control-text\\\"> \" + this.localize('Descriptions') + \"</span>\\n      \";\n    }\n\n    innerHTML += '</span>';\n\n    var el = _MenuItem.prototype.createEl.call(this, type, assign({\n      innerHTML: innerHTML\n    }, props), attrs);\n\n    return el;\n  }\n  /**\n   * This gets called when an `AudioTrackMenuItem is \"clicked\". See {@link ClickableComponent}\n   * for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    var tracks = this.player_.audioTracks();\n\n    _MenuItem.prototype.handleClick.call(this, event);\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i];\n      track.enabled = track === this.track;\n    }\n  }\n  /**\n   * Handle any {@link AudioTrack} change.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link AudioTrackList#change} event that caused this to run.\n   *\n   * @listens AudioTrackList#change\n   */\n  ;\n\n  _proto.handleTracksChange = function handleTracksChange(event) {\n    this.selected(this.track.enabled);\n  };\n\n  return AudioTrackMenuItem;\n}(MenuItem);\n\nComponent.registerComponent('AudioTrackMenuItem', AudioTrackMenuItem);\n/**\n * The base class for buttons that toggle specific {@link AudioTrack} types.\n *\n * @extends TrackButton\n */\n\nvar AudioTrackButton =\n/*#__PURE__*/\nfunction (_TrackButton) {\n  _inheritsLoose(AudioTrackButton, _TrackButton);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n\n\n  function AudioTrackButton(player, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    options.tracks = player.audioTracks();\n    return _TrackButton.call(this, player, options) || this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = AudioTrackButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-audio-button \" + _TrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-audio-button \" + _TrackButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Create a menu item for each audio track\n   *\n   * @param {AudioTrackMenuItem[]} [items=[]]\n   *        An array of existing menu items to use.\n   *\n   * @return {AudioTrackMenuItem[]}\n   *         An array of menu items\n   */\n  ;\n\n  _proto.createItems = function createItems(items) {\n    if (items === void 0) {\n      items = [];\n    } // if there's only one audio track, there no point in showing it\n\n\n    this.hideThreshold_ = 1;\n    var tracks = this.player_.audioTracks();\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i];\n      items.push(new AudioTrackMenuItem(this.player_, {\n        track: track,\n        // MenuItem is selectable\n        selectable: true,\n        // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n        multiSelectable: false\n      }));\n    }\n\n    return items;\n  };\n\n  return AudioTrackButton;\n}(TrackButton);\n/**\n * The text that should display over the `AudioTrackButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nAudioTrackButton.prototype.controlText_ = 'Audio Track';\nComponent.registerComponent('AudioTrackButton', AudioTrackButton);\n/**\n * The specific menu item type for selecting a playback rate.\n *\n * @extends MenuItem\n */\n\nvar PlaybackRateMenuItem =\n/*#__PURE__*/\nfunction (_MenuItem) {\n  _inheritsLoose(PlaybackRateMenuItem, _MenuItem);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function PlaybackRateMenuItem(player, options) {\n    var _this;\n\n    var label = options.rate;\n    var rate = parseFloat(label, 10); // Modify options for parent MenuItem class's init.\n\n    options.label = label;\n    options.selected = rate === 1;\n    options.selectable = true;\n    options.multiSelectable = false;\n    _this = _MenuItem.call(this, player, options) || this;\n    _this.label = label;\n    _this.rate = rate;\n\n    _this.on(player, 'ratechange', _this.update);\n\n    return _this;\n  }\n  /**\n   * This gets called when an `PlaybackRateMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  var _proto = PlaybackRateMenuItem.prototype;\n\n  _proto.handleClick = function handleClick(event) {\n    _MenuItem.prototype.handleClick.call(this);\n\n    this.player().playbackRate(this.rate);\n  }\n  /**\n   * Update the PlaybackRateMenuItem when the playbackrate changes.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `ratechange` event that caused this function to run.\n   *\n   * @listens Player#ratechange\n   */\n  ;\n\n  _proto.update = function update(event) {\n    this.selected(this.player().playbackRate() === this.rate);\n  };\n\n  return PlaybackRateMenuItem;\n}(MenuItem);\n/**\n * The text that should display over the `PlaybackRateMenuItem`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPlaybackRateMenuItem.prototype.contentElType = 'button';\nComponent.registerComponent('PlaybackRateMenuItem', PlaybackRateMenuItem);\n/**\n * The component for controlling the playback rate.\n *\n * @extends MenuButton\n */\n\nvar PlaybackRateMenuButton =\n/*#__PURE__*/\nfunction (_MenuButton) {\n  _inheritsLoose(PlaybackRateMenuButton, _MenuButton);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n\n\n  function PlaybackRateMenuButton(player, options) {\n    var _this;\n\n    _this = _MenuButton.call(this, player, options) || this;\n\n    _this.updateVisibility();\n\n    _this.updateLabel();\n\n    _this.on(player, 'loadstart', _this.updateVisibility);\n\n    _this.on(player, 'ratechange', _this.updateLabel);\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = PlaybackRateMenuButton.prototype;\n\n  _proto.createEl = function createEl$1() {\n    var el = _MenuButton.prototype.createEl.call(this);\n\n    this.labelEl_ = createEl('div', {\n      className: 'vjs-playback-rate-value',\n      innerHTML: '1x'\n    });\n    el.appendChild(this.labelEl_);\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    this.labelEl_ = null;\n\n    _MenuButton.prototype.dispose.call(this);\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-playback-rate \" + _MenuButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-playback-rate \" + _MenuButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Create the playback rate menu\n   *\n   * @return {Menu}\n   *         Menu object populated with {@link PlaybackRateMenuItem}s\n   */\n  ;\n\n  _proto.createMenu = function createMenu() {\n    var menu = new Menu(this.player());\n    var rates = this.playbackRates();\n\n    if (rates) {\n      for (var i = rates.length - 1; i >= 0; i--) {\n        menu.addChild(new PlaybackRateMenuItem(this.player(), {\n          rate: rates[i] + 'x'\n        }));\n      }\n    }\n\n    return menu;\n  }\n  /**\n   * Updates ARIA accessibility attributes\n   */\n  ;\n\n  _proto.updateARIAAttributes = function updateARIAAttributes() {\n    // Current playback rate\n    this.el().setAttribute('aria-valuenow', this.player().playbackRate());\n  }\n  /**\n   * This gets called when an `PlaybackRateMenuButton` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    // select next rate option\n    var currentRate = this.player().playbackRate();\n    var rates = this.playbackRates(); // this will select first one if the last one currently selected\n\n    var newRate = rates[0];\n\n    for (var i = 0; i < rates.length; i++) {\n      if (rates[i] > currentRate) {\n        newRate = rates[i];\n        break;\n      }\n    }\n\n    this.player().playbackRate(newRate);\n  }\n  /**\n   * Get possible playback rates\n   *\n   * @return {Array}\n   *         All possible playback rates\n   */\n  ;\n\n  _proto.playbackRates = function playbackRates() {\n    return this.options_.playbackRates || this.options_.playerOptions && this.options_.playerOptions.playbackRates;\n  }\n  /**\n   * Get whether playback rates is supported by the tech\n   * and an array of playback rates exists\n   *\n   * @return {boolean}\n   *         Whether changing playback rate is supported\n   */\n  ;\n\n  _proto.playbackRateSupported = function playbackRateSupported() {\n    return this.player().tech_ && this.player().tech_.featuresPlaybackRate && this.playbackRates() && this.playbackRates().length > 0;\n  }\n  /**\n   * Hide playback rate controls when they're no playback rate options to select\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#loadstart\n   */\n  ;\n\n  _proto.updateVisibility = function updateVisibility(event) {\n    if (this.playbackRateSupported()) {\n      this.removeClass('vjs-hidden');\n    } else {\n      this.addClass('vjs-hidden');\n    }\n  }\n  /**\n   * Update button label when rate changed\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#ratechange\n   */\n  ;\n\n  _proto.updateLabel = function updateLabel(event) {\n    if (this.playbackRateSupported()) {\n      this.labelEl_.innerHTML = this.player().playbackRate() + 'x';\n    }\n  };\n\n  return PlaybackRateMenuButton;\n}(MenuButton);\n/**\n * The text that should display over the `FullscreenToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPlaybackRateMenuButton.prototype.controlText_ = 'Playback Rate';\nComponent.registerComponent('PlaybackRateMenuButton', PlaybackRateMenuButton);\n/**\n * Just an empty spacer element that can be used as an append point for plugins, etc.\n * Also can be used to create space between elements when necessary.\n *\n * @extends Component\n */\n\nvar Spacer =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(Spacer, _Component);\n\n  function Spacer() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = Spacer.prototype;\n  /**\n  * Builds the default DOM `className`.\n  *\n  * @return {string}\n  *         The DOM `className` for this object.\n  */\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-spacer \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: this.buildCSSClass()\n    });\n  };\n\n  return Spacer;\n}(Component);\n\nComponent.registerComponent('Spacer', Spacer);\n/**\n * Spacer specifically meant to be used as an insertion point for new plugins, etc.\n *\n * @extends Spacer\n */\n\nvar CustomControlSpacer =\n/*#__PURE__*/\nfunction (_Spacer) {\n  _inheritsLoose(CustomControlSpacer, _Spacer);\n\n  function CustomControlSpacer() {\n    return _Spacer.apply(this, arguments) || this;\n  }\n\n  var _proto = CustomControlSpacer.prototype;\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-custom-control-spacer \" + _Spacer.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    var el = _Spacer.prototype.createEl.call(this, {\n      className: this.buildCSSClass()\n    }); // No-flex/table-cell mode requires there be some content\n    // in the cell to fill the remaining space of the table.\n\n\n    el.innerHTML = \"\\xA0\";\n    return el;\n  };\n\n  return CustomControlSpacer;\n}(Spacer);\n\nComponent.registerComponent('CustomControlSpacer', CustomControlSpacer);\n/**\n * Container of main controls.\n *\n * @extends Component\n */\n\nvar ControlBar =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(ControlBar, _Component);\n\n  function ControlBar() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = ControlBar.prototype;\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-control-bar',\n      dir: 'ltr'\n    });\n  };\n\n  return ControlBar;\n}(Component);\n/**\n * Default options for `ControlBar`\n *\n * @type {Object}\n * @private\n */\n\n\nControlBar.prototype.options_ = {\n  children: ['playToggle', 'volumePanel', 'currentTimeDisplay', 'timeDivider', 'durationDisplay', 'progressControl', 'liveDisplay', 'seekToLive', 'remainingTimeDisplay', 'customControlSpacer', 'playbackRateMenuButton', 'chaptersButton', 'descriptionsButton', 'subsCapsButton', 'audioTrackButton', 'fullscreenToggle']\n};\n\nif ('exitPictureInPicture' in document) {\n  ControlBar.prototype.options_.children.splice(ControlBar.prototype.options_.children.length - 1, 0, 'pictureInPictureToggle');\n}\n\nComponent.registerComponent('ControlBar', ControlBar);\n/**\n * A display that indicates an error has occurred. This means that the video\n * is unplayable.\n *\n * @extends ModalDialog\n */\n\nvar ErrorDisplay =\n/*#__PURE__*/\nfunction (_ModalDialog) {\n  _inheritsLoose(ErrorDisplay, _ModalDialog);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param  {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param  {Object} [options]\n   *         The key/value store of player options.\n   */\n\n\n  function ErrorDisplay(player, options) {\n    var _this;\n\n    _this = _ModalDialog.call(this, player, options) || this;\n\n    _this.on(player, 'error', _this.open);\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   *\n   * @deprecated Since version 5.\n   */\n\n\n  var _proto = ErrorDisplay.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-error-display \" + _ModalDialog.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Gets the localized error message based on the `Player`s error.\n   *\n   * @return {string}\n   *         The `Player`s error message localized or an empty string.\n   */\n  ;\n\n  _proto.content = function content() {\n    var error = this.player().error();\n    return error ? this.localize(error.message) : '';\n  };\n\n  return ErrorDisplay;\n}(ModalDialog);\n/**\n * The default options for an `ErrorDisplay`.\n *\n * @private\n */\n\n\nErrorDisplay.prototype.options_ = mergeOptions(ModalDialog.prototype.options_, {\n  pauseOnOpen: false,\n  fillAlways: true,\n  temporary: false,\n  uncloseable: true\n});\nComponent.registerComponent('ErrorDisplay', ErrorDisplay);\nvar LOCAL_STORAGE_KEY = 'vjs-text-track-settings';\nvar COLOR_BLACK = ['#000', 'Black'];\nvar COLOR_BLUE = ['#00F', 'Blue'];\nvar COLOR_CYAN = ['#0FF', 'Cyan'];\nvar COLOR_GREEN = ['#0F0', 'Green'];\nvar COLOR_MAGENTA = ['#F0F', 'Magenta'];\nvar COLOR_RED = ['#F00', 'Red'];\nvar COLOR_WHITE = ['#FFF', 'White'];\nvar COLOR_YELLOW = ['#FF0', 'Yellow'];\nvar OPACITY_OPAQUE = ['1', 'Opaque'];\nvar OPACITY_SEMI = ['0.5', 'Semi-Transparent'];\nvar OPACITY_TRANS = ['0', 'Transparent']; // Configuration for the various <select> elements in the DOM of this component.\n//\n// Possible keys include:\n//\n// `default`:\n//   The default option index. Only needs to be provided if not zero.\n// `parser`:\n//   A function which is used to parse the value from the selected option in\n//   a customized way.\n// `selector`:\n//   The selector used to find the associated <select> element.\n\nvar selectConfigs = {\n  backgroundColor: {\n    selector: '.vjs-bg-color > select',\n    id: 'captions-background-color-%s',\n    label: 'Color',\n    options: [COLOR_BLACK, COLOR_WHITE, COLOR_RED, COLOR_GREEN, COLOR_BLUE, COLOR_YELLOW, COLOR_MAGENTA, COLOR_CYAN]\n  },\n  backgroundOpacity: {\n    selector: '.vjs-bg-opacity > select',\n    id: 'captions-background-opacity-%s',\n    label: 'Transparency',\n    options: [OPACITY_OPAQUE, OPACITY_SEMI, OPACITY_TRANS]\n  },\n  color: {\n    selector: '.vjs-fg-color > select',\n    id: 'captions-foreground-color-%s',\n    label: 'Color',\n    options: [COLOR_WHITE, COLOR_BLACK, COLOR_RED, COLOR_GREEN, COLOR_BLUE, COLOR_YELLOW, COLOR_MAGENTA, COLOR_CYAN]\n  },\n  edgeStyle: {\n    selector: '.vjs-edge-style > select',\n    id: '%s',\n    label: 'Text Edge Style',\n    options: [['none', 'None'], ['raised', 'Raised'], ['depressed', 'Depressed'], ['uniform', 'Uniform'], ['dropshadow', 'Dropshadow']]\n  },\n  fontFamily: {\n    selector: '.vjs-font-family > select',\n    id: 'captions-font-family-%s',\n    label: 'Font Family',\n    options: [['proportionalSansSerif', 'Proportional Sans-Serif'], ['monospaceSansSerif', 'Monospace Sans-Serif'], ['proportionalSerif', 'Proportional Serif'], ['monospaceSerif', 'Monospace Serif'], ['casual', 'Casual'], ['script', 'Script'], ['small-caps', 'Small Caps']]\n  },\n  fontPercent: {\n    selector: '.vjs-font-percent > select',\n    id: 'captions-font-size-%s',\n    label: 'Font Size',\n    options: [['0.50', '50%'], ['0.75', '75%'], ['1.00', '100%'], ['1.25', '125%'], ['1.50', '150%'], ['1.75', '175%'], ['2.00', '200%'], ['3.00', '300%'], ['4.00', '400%']],\n    \"default\": 2,\n    parser: function parser(v) {\n      return v === '1.00' ? null : Number(v);\n    }\n  },\n  textOpacity: {\n    selector: '.vjs-text-opacity > select',\n    id: 'captions-foreground-opacity-%s',\n    label: 'Transparency',\n    options: [OPACITY_OPAQUE, OPACITY_SEMI]\n  },\n  // Options for this object are defined below.\n  windowColor: {\n    selector: '.vjs-window-color > select',\n    id: 'captions-window-color-%s',\n    label: 'Color'\n  },\n  // Options for this object are defined below.\n  windowOpacity: {\n    selector: '.vjs-window-opacity > select',\n    id: 'captions-window-opacity-%s',\n    label: 'Transparency',\n    options: [OPACITY_TRANS, OPACITY_SEMI, OPACITY_OPAQUE]\n  }\n};\nselectConfigs.windowColor.options = selectConfigs.backgroundColor.options;\n/**\n * Get the actual value of an option.\n *\n * @param  {string} value\n *         The value to get\n *\n * @param  {Function} [parser]\n *         Optional function to adjust the value.\n *\n * @return {Mixed}\n *         - Will be `undefined` if no value exists\n *         - Will be `undefined` if the given value is \"none\".\n *         - Will be the actual value otherwise.\n *\n * @private\n */\n\nfunction parseOptionValue(value, parser) {\n  if (parser) {\n    value = parser(value);\n  }\n\n  if (value && value !== 'none') {\n    return value;\n  }\n}\n/**\n * Gets the value of the selected <option> element within a <select> element.\n *\n * @param  {Element} el\n *         the element to look in\n *\n * @param  {Function} [parser]\n *         Optional function to adjust the value.\n *\n * @return {Mixed}\n *         - Will be `undefined` if no value exists\n *         - Will be `undefined` if the given value is \"none\".\n *         - Will be the actual value otherwise.\n *\n * @private\n */\n\n\nfunction getSelectedOptionValue(el, parser) {\n  var value = el.options[el.options.selectedIndex].value;\n  return parseOptionValue(value, parser);\n}\n/**\n * Sets the selected <option> element within a <select> element based on a\n * given value.\n *\n * @param {Element} el\n *        The element to look in.\n *\n * @param {string} value\n *        the property to look on.\n *\n * @param {Function} [parser]\n *        Optional function to adjust the value before comparing.\n *\n * @private\n */\n\n\nfunction setSelectedOption(el, value, parser) {\n  if (!value) {\n    return;\n  }\n\n  for (var i = 0; i < el.options.length; i++) {\n    if (parseOptionValue(el.options[i].value, parser) === value) {\n      el.selectedIndex = i;\n      break;\n    }\n  }\n}\n/**\n * Manipulate Text Tracks settings.\n *\n * @extends ModalDialog\n */\n\n\nvar TextTrackSettings =\n/*#__PURE__*/\nfunction (_ModalDialog) {\n  _inheritsLoose(TextTrackSettings, _ModalDialog);\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *         The key/value store of player options.\n   */\n\n\n  function TextTrackSettings(player, options) {\n    var _this;\n\n    options.temporary = false;\n    _this = _ModalDialog.call(this, player, options) || this;\n    _this.updateDisplay = bind(_assertThisInitialized(_this), _this.updateDisplay); // fill the modal and pretend we have opened it\n\n    _this.fill();\n\n    _this.hasBeenOpened_ = _this.hasBeenFilled_ = true;\n    _this.endDialog = createEl('p', {\n      className: 'vjs-control-text',\n      textContent: _this.localize('End of dialog window.')\n    });\n\n    _this.el().appendChild(_this.endDialog);\n\n    _this.setDefaults(); // Grab `persistTextTrackSettings` from the player options if not passed in child options\n\n\n    if (options.persistTextTrackSettings === undefined) {\n      _this.options_.persistTextTrackSettings = _this.options_.playerOptions.persistTextTrackSettings;\n    }\n\n    _this.on(_this.$('.vjs-done-button'), 'click', function () {\n      _this.saveSettings();\n\n      _this.close();\n    });\n\n    _this.on(_this.$('.vjs-default-button'), 'click', function () {\n      _this.setDefaults();\n\n      _this.updateDisplay();\n    });\n\n    each(selectConfigs, function (config) {\n      _this.on(_this.$(config.selector), 'change', _this.updateDisplay);\n    });\n\n    if (_this.options_.persistTextTrackSettings) {\n      _this.restoreSettings();\n    }\n\n    return _this;\n  }\n\n  var _proto = TextTrackSettings.prototype;\n\n  _proto.dispose = function dispose() {\n    this.endDialog = null;\n\n    _ModalDialog.prototype.dispose.call(this);\n  }\n  /**\n   * Create a <select> element with configured options.\n   *\n   * @param {string} key\n   *        Configuration key to use during creation.\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElSelect_ = function createElSelect_(key, legendId, type) {\n    var _this2 = this;\n\n    if (legendId === void 0) {\n      legendId = '';\n    }\n\n    if (type === void 0) {\n      type = 'label';\n    }\n\n    var config = selectConfigs[key];\n    var id = config.id.replace('%s', this.id_);\n    var selectLabelledbyIds = [legendId, id].join(' ').trim();\n    return [\"<\" + type + \" id=\\\"\" + id + \"\\\" class=\\\"\" + (type === 'label' ? 'vjs-label' : '') + \"\\\">\", this.localize(config.label), \"</\" + type + \">\", \"<select aria-labelledby=\\\"\" + selectLabelledbyIds + \"\\\">\"].concat(config.options.map(function (o) {\n      var optionId = id + '-' + o[1].replace(/\\W+/g, '');\n      return [\"<option id=\\\"\" + optionId + \"\\\" value=\\\"\" + o[0] + \"\\\" \", \"aria-labelledby=\\\"\" + selectLabelledbyIds + \" \" + optionId + \"\\\">\", _this2.localize(o[1]), '</option>'].join('');\n    })).concat('</select>').join('');\n  }\n  /**\n   * Create foreground color element for the component\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElFgColor_ = function createElFgColor_() {\n    var legendId = \"captions-text-legend-\" + this.id_;\n    return ['<fieldset class=\"vjs-fg-color vjs-track-setting\">', \"<legend id=\\\"\" + legendId + \"\\\">\", this.localize('Text'), '</legend>', this.createElSelect_('color', legendId), '<span class=\"vjs-text-opacity vjs-opacity\">', this.createElSelect_('textOpacity', legendId), '</span>', '</fieldset>'].join('');\n  }\n  /**\n   * Create background color element for the component\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElBgColor_ = function createElBgColor_() {\n    var legendId = \"captions-background-\" + this.id_;\n    return ['<fieldset class=\"vjs-bg-color vjs-track-setting\">', \"<legend id=\\\"\" + legendId + \"\\\">\", this.localize('Background'), '</legend>', this.createElSelect_('backgroundColor', legendId), '<span class=\"vjs-bg-opacity vjs-opacity\">', this.createElSelect_('backgroundOpacity', legendId), '</span>', '</fieldset>'].join('');\n  }\n  /**\n   * Create window color element for the component\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElWinColor_ = function createElWinColor_() {\n    var legendId = \"captions-window-\" + this.id_;\n    return ['<fieldset class=\"vjs-window-color vjs-track-setting\">', \"<legend id=\\\"\" + legendId + \"\\\">\", this.localize('Window'), '</legend>', this.createElSelect_('windowColor', legendId), '<span class=\"vjs-window-opacity vjs-opacity\">', this.createElSelect_('windowOpacity', legendId), '</span>', '</fieldset>'].join('');\n  }\n  /**\n   * Create color elements for the component\n   *\n   * @return {Element}\n   *         The element that was created\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElColors_ = function createElColors_() {\n    return createEl('div', {\n      className: 'vjs-track-settings-colors',\n      innerHTML: [this.createElFgColor_(), this.createElBgColor_(), this.createElWinColor_()].join('')\n    });\n  }\n  /**\n   * Create font elements for the component\n   *\n   * @return {Element}\n   *         The element that was created.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElFont_ = function createElFont_() {\n    return createEl('div', {\n      className: 'vjs-track-settings-font',\n      innerHTML: ['<fieldset class=\"vjs-font-percent vjs-track-setting\">', this.createElSelect_('fontPercent', '', 'legend'), '</fieldset>', '<fieldset class=\"vjs-edge-style vjs-track-setting\">', this.createElSelect_('edgeStyle', '', 'legend'), '</fieldset>', '<fieldset class=\"vjs-font-family vjs-track-setting\">', this.createElSelect_('fontFamily', '', 'legend'), '</fieldset>'].join('')\n    });\n  }\n  /**\n   * Create controls for the component\n   *\n   * @return {Element}\n   *         The element that was created.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElControls_ = function createElControls_() {\n    var defaultsDescription = this.localize('restore all settings to the default values');\n    return createEl('div', {\n      className: 'vjs-track-settings-controls',\n      innerHTML: [\"<button type=\\\"button\\\" class=\\\"vjs-default-button\\\" title=\\\"\" + defaultsDescription + \"\\\">\", this.localize('Reset'), \"<span class=\\\"vjs-control-text\\\"> \" + defaultsDescription + \"</span>\", '</button>', \"<button type=\\\"button\\\" class=\\\"vjs-done-button\\\">\" + this.localize('Done') + \"</button>\"].join('')\n    });\n  };\n\n  _proto.content = function content() {\n    return [this.createElColors_(), this.createElFont_(), this.createElControls_()];\n  };\n\n  _proto.label = function label() {\n    return this.localize('Caption Settings Dialog');\n  };\n\n  _proto.description = function description() {\n    return this.localize('Beginning of dialog window. Escape will cancel and close the window.');\n  };\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return _ModalDialog.prototype.buildCSSClass.call(this) + ' vjs-text-track-settings';\n  }\n  /**\n   * Gets an object of text track settings (or null).\n   *\n   * @return {Object}\n   *         An object with config values parsed from the DOM or localStorage.\n   */\n  ;\n\n  _proto.getValues = function getValues() {\n    var _this3 = this;\n\n    return reduce(selectConfigs, function (accum, config, key) {\n      var value = getSelectedOptionValue(_this3.$(config.selector), config.parser);\n\n      if (value !== undefined) {\n        accum[key] = value;\n      }\n\n      return accum;\n    }, {});\n  }\n  /**\n   * Sets text track settings from an object of values.\n   *\n   * @param {Object} values\n   *        An object with config values parsed from the DOM or localStorage.\n   */\n  ;\n\n  _proto.setValues = function setValues(values) {\n    var _this4 = this;\n\n    each(selectConfigs, function (config, key) {\n      setSelectedOption(_this4.$(config.selector), values[key], config.parser);\n    });\n  }\n  /**\n   * Sets all `<select>` elements to their default values.\n   */\n  ;\n\n  _proto.setDefaults = function setDefaults() {\n    var _this5 = this;\n\n    each(selectConfigs, function (config) {\n      var index = config.hasOwnProperty('default') ? config[\"default\"] : 0;\n      _this5.$(config.selector).selectedIndex = index;\n    });\n  }\n  /**\n   * Restore texttrack settings from localStorage\n   */\n  ;\n\n  _proto.restoreSettings = function restoreSettings() {\n    var values;\n\n    try {\n      values = JSON.parse(window$1.localStorage.getItem(LOCAL_STORAGE_KEY));\n    } catch (err) {\n      log.warn(err);\n    }\n\n    if (values) {\n      this.setValues(values);\n    }\n  }\n  /**\n   * Save text track settings to localStorage\n   */\n  ;\n\n  _proto.saveSettings = function saveSettings() {\n    if (!this.options_.persistTextTrackSettings) {\n      return;\n    }\n\n    var values = this.getValues();\n\n    try {\n      if (Object.keys(values).length) {\n        window$1.localStorage.setItem(LOCAL_STORAGE_KEY, JSON.stringify(values));\n      } else {\n        window$1.localStorage.removeItem(LOCAL_STORAGE_KEY);\n      }\n    } catch (err) {\n      log.warn(err);\n    }\n  }\n  /**\n   * Update display of text track settings\n   */\n  ;\n\n  _proto.updateDisplay = function updateDisplay() {\n    var ttDisplay = this.player_.getChild('textTrackDisplay');\n\n    if (ttDisplay) {\n      ttDisplay.updateDisplay();\n    }\n  }\n  /**\n   * conditionally blur the element and refocus the captions button\n   *\n   * @private\n   */\n  ;\n\n  _proto.conditionalBlur_ = function conditionalBlur_() {\n    this.previouslyActiveEl_ = null;\n    var cb = this.player_.controlBar;\n    var subsCapsBtn = cb && cb.subsCapsButton;\n    var ccBtn = cb && cb.captionsButton;\n\n    if (subsCapsBtn) {\n      subsCapsBtn.focus();\n    } else if (ccBtn) {\n      ccBtn.focus();\n    }\n  };\n\n  return TextTrackSettings;\n}(ModalDialog);\n\nComponent.registerComponent('TextTrackSettings', TextTrackSettings);\n/**\n * A Resize Manager. It is in charge of triggering `playerresize` on the player in the right conditions.\n *\n * It'll either create an iframe and use a debounced resize handler on it or use the new {@link https://wicg.github.io/ResizeObserver/|ResizeObserver}.\n *\n * If the ResizeObserver is available natively, it will be used. A polyfill can be passed in as an option.\n * If a `playerresize` event is not needed, the ResizeManager component can be removed from the player, see the example below.\n * @example <caption>How to disable the resize manager</caption>\n * const player = videojs('#vid', {\n *   resizeManager: false\n * });\n *\n * @see {@link https://wicg.github.io/ResizeObserver/|ResizeObserver specification}\n *\n * @extends Component\n */\n\nvar ResizeManager =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(ResizeManager, _Component);\n  /**\n   * Create the ResizeManager.\n   *\n   * @param {Object} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of ResizeManager options.\n   *\n   * @param {Object} [options.ResizeObserver]\n   *        A polyfill for ResizeObserver can be passed in here.\n   *        If this is set to null it will ignore the native ResizeObserver and fall back to the iframe fallback.\n   */\n\n\n  function ResizeManager(player, options) {\n    var _this;\n\n    var RESIZE_OBSERVER_AVAILABLE = options.ResizeObserver || window$1.ResizeObserver; // if `null` was passed, we want to disable the ResizeObserver\n\n    if (options.ResizeObserver === null) {\n      RESIZE_OBSERVER_AVAILABLE = false;\n    } // Only create an element when ResizeObserver isn't available\n\n\n    var options_ = mergeOptions({\n      createEl: !RESIZE_OBSERVER_AVAILABLE,\n      reportTouchActivity: false\n    }, options);\n    _this = _Component.call(this, player, options_) || this;\n    _this.ResizeObserver = options.ResizeObserver || window$1.ResizeObserver;\n    _this.loadListener_ = null;\n    _this.resizeObserver_ = null;\n    _this.debouncedHandler_ = debounce(function () {\n      _this.resizeHandler();\n    }, 100, false, _assertThisInitialized(_this));\n\n    if (RESIZE_OBSERVER_AVAILABLE) {\n      _this.resizeObserver_ = new _this.ResizeObserver(_this.debouncedHandler_);\n\n      _this.resizeObserver_.observe(player.el());\n    } else {\n      _this.loadListener_ = function () {\n        if (!_this.el_ || !_this.el_.contentWindow) {\n          return;\n        }\n\n        var debouncedHandler_ = _this.debouncedHandler_;\n\n        var unloadListener_ = _this.unloadListener_ = function () {\n          off(this, 'resize', debouncedHandler_);\n          off(this, 'unload', unloadListener_);\n          unloadListener_ = null;\n        }; // safari and edge can unload the iframe before resizemanager dispose\n        // we have to dispose of event handlers correctly before that happens\n\n\n        on(_this.el_.contentWindow, 'unload', unloadListener_);\n        on(_this.el_.contentWindow, 'resize', debouncedHandler_);\n      };\n\n      _this.one('load', _this.loadListener_);\n    }\n\n    return _this;\n  }\n\n  var _proto = ResizeManager.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'iframe', {\n      className: 'vjs-resize-manager',\n      tabIndex: -1\n    }, {\n      'aria-hidden': 'true'\n    });\n  }\n  /**\n   * Called when a resize is triggered on the iframe or a resize is observed via the ResizeObserver\n   *\n   * @fires Player#playerresize\n   */\n  ;\n\n  _proto.resizeHandler = function resizeHandler() {\n    /**\n     * Called when the player size has changed\n     *\n     * @event Player#playerresize\n     * @type {EventTarget~Event}\n     */\n    // make sure player is still around to trigger\n    // prevents this from causing an error after dispose\n    if (!this.player_ || !this.player_.trigger) {\n      return;\n    }\n\n    this.player_.trigger('playerresize');\n  };\n\n  _proto.dispose = function dispose() {\n    if (this.debouncedHandler_) {\n      this.debouncedHandler_.cancel();\n    }\n\n    if (this.resizeObserver_) {\n      if (this.player_.el()) {\n        this.resizeObserver_.unobserve(this.player_.el());\n      }\n\n      this.resizeObserver_.disconnect();\n    }\n\n    if (this.loadListener_) {\n      this.off('load', this.loadListener_);\n    }\n\n    if (this.el_ && this.el_.contentWindow && this.unloadListener_) {\n      this.unloadListener_.call(this.el_.contentWindow);\n    }\n\n    this.ResizeObserver = null;\n    this.resizeObserver = null;\n    this.debouncedHandler_ = null;\n    this.loadListener_ = null;\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  return ResizeManager;\n}(Component);\n\nComponent.registerComponent('ResizeManager', ResizeManager);\n/**\n * Computes the median of an array.\n *\n * @param {number[]} arr\n *        Input array of numbers.\n *\n * @return {number}\n *        Median value.\n */\n\nvar median = function median(arr) {\n  var mid = Math.floor(arr.length / 2);\n  var sortedList = [].concat(arr).sort(function (a, b) {\n    return a - b;\n  });\n  return arr.length % 2 !== 0 ? sortedList[mid] : (sortedList[mid - 1] + sortedList[mid]) / 2;\n};\n/* track when we are at the live edge, and other helpers for live playback */\n\n\nvar LiveTracker =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(LiveTracker, _Component);\n\n  function LiveTracker(player, options) {\n    var _this; // LiveTracker does not need an element\n\n\n    var options_ = mergeOptions({\n      createEl: false\n    }, options);\n    _this = _Component.call(this, player, options_) || this;\n\n    _this.reset_();\n\n    _this.on(_this.player_, 'durationchange', _this.handleDurationchange); // we don't need to track live playback if the document is hidden,\n    // also, tracking when the document is hidden can\n    // cause the CPU to spike and eventually crash the page on IE11.\n\n\n    if (IE_VERSION && 'hidden' in document && 'visibilityState' in document) {\n      _this.on(document, 'visibilitychange', _this.handleVisibilityChange);\n    }\n\n    return _this;\n  }\n\n  var _proto = LiveTracker.prototype;\n\n  _proto.handleVisibilityChange = function handleVisibilityChange() {\n    if (this.player_.duration() !== Infinity) {\n      return;\n    }\n\n    if (document.hidden) {\n      this.stopTracking();\n    } else {\n      this.startTracking();\n    }\n  };\n\n  _proto.isBehind_ = function isBehind_() {\n    // don't report that we are behind until a timeupdate has been seen\n    if (!this.timeupdateSeen_) {\n      return false;\n    }\n\n    var liveCurrentTime = this.liveCurrentTime();\n    var currentTime = this.player_.currentTime(); // the live edge window is the amount of seconds away from live\n    // that a player can be, but still be considered live.\n    // we add 0.07 because the live tracking happens every 30ms\n    // and we want some wiggle room for short segment live playback\n\n    var liveEdgeWindow = this.seekableIncrement_ * 2 + 0.07; // on Android liveCurrentTime can bee Infinity, because seekableEnd\n    // can be Infinity, so we handle that case.\n\n    return liveCurrentTime !== Infinity && liveCurrentTime - liveEdgeWindow >= currentTime;\n  } // all the functionality for tracking when seek end changes\n  // and for tracking how far past seek end we should be\n  ;\n\n  _proto.trackLive_ = function trackLive_() {\n    this.pastSeekEnd_ = this.pastSeekEnd_;\n    var seekable = this.player_.seekable(); // skip undefined seekable\n\n    if (!seekable || !seekable.length) {\n      return;\n    }\n\n    var newSeekEnd = this.seekableEnd(); // we can only tell if we are behind live, when seekable changes\n    // once we detect that seekable has changed we check the new seek\n    // end against current time, with a fudge value of half a second.\n\n    if (newSeekEnd !== this.lastSeekEnd_) {\n      if (this.lastSeekEnd_) {\n        // we try to get the best fit value for the seeking increment\n        // variable from the last 12 values.\n        this.seekableIncrementList_ = this.seekableIncrementList_.slice(-11);\n        this.seekableIncrementList_.push(Math.abs(newSeekEnd - this.lastSeekEnd_));\n\n        if (this.seekableIncrementList_.length > 3) {\n          this.seekableIncrement_ = median(this.seekableIncrementList_);\n        }\n      }\n\n      this.pastSeekEnd_ = 0;\n      this.lastSeekEnd_ = newSeekEnd;\n      this.trigger('seekableendchange');\n    }\n\n    this.pastSeekEnd_ = this.pastSeekEnd() + 0.03;\n\n    if (this.isBehind_() !== this.behindLiveEdge()) {\n      this.behindLiveEdge_ = this.isBehind_();\n      this.trigger('liveedgechange');\n    }\n  }\n  /**\n   * handle a durationchange event on the player\n   * and start/stop tracking accordingly.\n   */\n  ;\n\n  _proto.handleDurationchange = function handleDurationchange() {\n    if (this.player_.duration() === Infinity) {\n      this.startTracking();\n    } else {\n      this.stopTracking();\n    }\n  }\n  /**\n   * start tracking live playback\n   */\n  ;\n\n  _proto.startTracking = function startTracking() {\n    var _this2 = this;\n\n    if (this.isTracking()) {\n      return;\n    } // If we haven't seen a timeupdate, we need to check whether playback\n    // began before this component started tracking. This can happen commonly\n    // when using autoplay.\n\n\n    if (!this.timeupdateSeen_) {\n      this.timeupdateSeen_ = this.player_.hasStarted();\n    }\n\n    this.trackingInterval_ = this.setInterval(this.trackLive_, 30);\n    this.trackLive_();\n    this.on(this.player_, 'play', this.trackLive_);\n    this.on(this.player_, 'pause', this.trackLive_); // this is to prevent showing that we are not live\n    // before a video starts to play\n\n    if (!this.timeupdateSeen_) {\n      this.one(this.player_, 'play', this.handlePlay);\n\n      this.handleTimeupdate = function () {\n        _this2.timeupdateSeen_ = true;\n        _this2.handleTimeupdate = null;\n      };\n\n      this.one(this.player_, 'timeupdate', this.handleTimeupdate);\n    }\n  };\n\n  _proto.handlePlay = function handlePlay() {\n    this.one(this.player_, 'timeupdate', this.seekToLiveEdge);\n  }\n  /**\n   * Stop tracking, and set all internal variables to\n   * their initial value.\n   */\n  ;\n\n  _proto.reset_ = function reset_() {\n    this.pastSeekEnd_ = 0;\n    this.lastSeekEnd_ = null;\n    this.behindLiveEdge_ = null;\n    this.timeupdateSeen_ = false;\n    this.clearInterval(this.trackingInterval_);\n    this.trackingInterval_ = null;\n    this.seekableIncrement_ = 12;\n    this.seekableIncrementList_ = [];\n    this.off(this.player_, 'play', this.trackLive_);\n    this.off(this.player_, 'pause', this.trackLive_);\n    this.off(this.player_, 'play', this.handlePlay);\n    this.off(this.player_, 'timeupdate', this.seekToLiveEdge);\n\n    if (this.handleTimeupdate) {\n      this.off(this.player_, 'timeupdate', this.handleTimeupdate);\n      this.handleTimeupdate = null;\n    }\n  }\n  /**\n   * stop tracking live playback\n   */\n  ;\n\n  _proto.stopTracking = function stopTracking() {\n    if (!this.isTracking()) {\n      return;\n    }\n\n    this.reset_();\n  }\n  /**\n   * A helper to get the player seekable end\n   * so that we don't have to null check everywhere\n   */\n  ;\n\n  _proto.seekableEnd = function seekableEnd() {\n    var seekable = this.player_.seekable();\n    var seekableEnds = [];\n    var i = seekable ? seekable.length : 0;\n\n    while (i--) {\n      seekableEnds.push(seekable.end(i));\n    } // grab the furthest seekable end after sorting, or if there are none\n    // default to Infinity\n\n\n    return seekableEnds.length ? seekableEnds.sort()[seekableEnds.length - 1] : Infinity;\n  }\n  /**\n   * A helper to get the player seekable start\n   * so that we don't have to null check everywhere\n   */\n  ;\n\n  _proto.seekableStart = function seekableStart() {\n    var seekable = this.player_.seekable();\n    var seekableStarts = [];\n    var i = seekable ? seekable.length : 0;\n\n    while (i--) {\n      seekableStarts.push(seekable.start(i));\n    } // grab the first seekable start after sorting, or if there are none\n    // default to 0\n\n\n    return seekableStarts.length ? seekableStarts.sort()[0] : 0;\n  }\n  /**\n   * Get the live time window\n   */\n  ;\n\n  _proto.liveWindow = function liveWindow() {\n    var liveCurrentTime = this.liveCurrentTime();\n\n    if (liveCurrentTime === Infinity) {\n      return Infinity;\n    }\n\n    return liveCurrentTime - this.seekableStart();\n  }\n  /**\n   * Determines if the player is live, only checks if this component\n   * is tracking live playback or not\n   */\n  ;\n\n  _proto.isLive = function isLive() {\n    return this.isTracking();\n  }\n  /**\n   * Determines if currentTime is at the live edge and won't fall behind\n   * on each seekableendchange\n   */\n  ;\n\n  _proto.atLiveEdge = function atLiveEdge() {\n    return !this.behindLiveEdge();\n  }\n  /**\n   * get what we expect the live current time to be\n   */\n  ;\n\n  _proto.liveCurrentTime = function liveCurrentTime() {\n    return this.pastSeekEnd() + this.seekableEnd();\n  }\n  /**\n   * Returns how far past seek end we expect current time to be\n   */\n  ;\n\n  _proto.pastSeekEnd = function pastSeekEnd() {\n    return this.pastSeekEnd_;\n  }\n  /**\n   * If we are currently behind the live edge, aka currentTime will be\n   * behind on a seekableendchange\n   */\n  ;\n\n  _proto.behindLiveEdge = function behindLiveEdge() {\n    return this.behindLiveEdge_;\n  };\n\n  _proto.isTracking = function isTracking() {\n    return typeof this.trackingInterval_ === 'number';\n  }\n  /**\n   * Seek to the live edge if we are behind the live edge\n   */\n  ;\n\n  _proto.seekToLiveEdge = function seekToLiveEdge() {\n    if (this.atLiveEdge()) {\n      return;\n    }\n\n    this.player_.currentTime(this.liveCurrentTime());\n\n    if (this.player_.paused()) {\n      this.player_.play();\n    }\n  };\n\n  _proto.dispose = function dispose() {\n    this.stopTracking();\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  return LiveTracker;\n}(Component);\n\nComponent.registerComponent('LiveTracker', LiveTracker);\n/**\n * This function is used to fire a sourceset when there is something\n * similar to `mediaEl.load()` being called. It will try to find the source via\n * the `src` attribute and then the `<source>` elements. It will then fire `sourceset`\n * with the source that was found or empty string if we cannot know. If it cannot\n * find a source then `sourceset` will not be fired.\n *\n * @param {Html5} tech\n *        The tech object that sourceset was setup on\n *\n * @return {boolean}\n *         returns false if the sourceset was not fired and true otherwise.\n */\n\nvar sourcesetLoad = function sourcesetLoad(tech) {\n  var el = tech.el(); // if `el.src` is set, that source will be loaded.\n\n  if (el.hasAttribute('src')) {\n    tech.triggerSourceset(el.src);\n    return true;\n  }\n  /**\n   * Since there isn't a src property on the media element, source elements will be used for\n   * implementing the source selection algorithm. This happens asynchronously and\n   * for most cases were there is more than one source we cannot tell what source will\n   * be loaded, without re-implementing the source selection algorithm. At this time we are not\n   * going to do that. There are three special cases that we do handle here though:\n   *\n   * 1. If there are no sources, do not fire `sourceset`.\n   * 2. If there is only one `<source>` with a `src` property/attribute that is our `src`\n   * 3. If there is more than one `<source>` but all of them have the same `src` url.\n   *    That will be our src.\n   */\n\n\n  var sources = tech.$$('source');\n  var srcUrls = [];\n  var src = ''; // if there are no sources, do not fire sourceset\n\n  if (!sources.length) {\n    return false;\n  } // only count valid/non-duplicate source elements\n\n\n  for (var i = 0; i < sources.length; i++) {\n    var url = sources[i].src;\n\n    if (url && srcUrls.indexOf(url) === -1) {\n      srcUrls.push(url);\n    }\n  } // there were no valid sources\n\n\n  if (!srcUrls.length) {\n    return false;\n  } // there is only one valid source element url\n  // use that\n\n\n  if (srcUrls.length === 1) {\n    src = srcUrls[0];\n  }\n\n  tech.triggerSourceset(src);\n  return true;\n};\n/**\n * our implementation of an `innerHTML` descriptor for browsers\n * that do not have one.\n */\n\n\nvar innerHTMLDescriptorPolyfill = Object.defineProperty({}, 'innerHTML', {\n  get: function get() {\n    return this.cloneNode(true).innerHTML;\n  },\n  set: function set(v) {\n    // make a dummy node to use innerHTML on\n    var dummy = document.createElement(this.nodeName.toLowerCase()); // set innerHTML to the value provided\n\n    dummy.innerHTML = v; // make a document fragment to hold the nodes from dummy\n\n    var docFrag = document.createDocumentFragment(); // copy all of the nodes created by the innerHTML on dummy\n    // to the document fragment\n\n    while (dummy.childNodes.length) {\n      docFrag.appendChild(dummy.childNodes[0]);\n    } // remove content\n\n\n    this.innerText = ''; // now we add all of that html in one by appending the\n    // document fragment. This is how innerHTML does it.\n\n    window$1.Element.prototype.appendChild.call(this, docFrag); // then return the result that innerHTML's setter would\n\n    return this.innerHTML;\n  }\n});\n/**\n * Get a property descriptor given a list of priorities and the\n * property to get.\n */\n\nvar getDescriptor = function getDescriptor(priority, prop) {\n  var descriptor = {};\n\n  for (var i = 0; i < priority.length; i++) {\n    descriptor = Object.getOwnPropertyDescriptor(priority[i], prop);\n\n    if (descriptor && descriptor.set && descriptor.get) {\n      break;\n    }\n  }\n\n  descriptor.enumerable = true;\n  descriptor.configurable = true;\n  return descriptor;\n};\n\nvar getInnerHTMLDescriptor = function getInnerHTMLDescriptor(tech) {\n  return getDescriptor([tech.el(), window$1.HTMLMediaElement.prototype, window$1.Element.prototype, innerHTMLDescriptorPolyfill], 'innerHTML');\n};\n/**\n * Patches browser internal functions so that we can tell synchronously\n * if a `<source>` was appended to the media element. For some reason this\n * causes a `sourceset` if the the media element is ready and has no source.\n * This happens when:\n * - The page has just loaded and the media element does not have a source.\n * - The media element was emptied of all sources, then `load()` was called.\n *\n * It does this by patching the following functions/properties when they are supported:\n *\n * - `append()` - can be used to add a `<source>` element to the media element\n * - `appendChild()` - can be used to add a `<source>` element to the media element\n * - `insertAdjacentHTML()` -  can be used to add a `<source>` element to the media element\n * - `innerHTML` -  can be used to add a `<source>` element to the media element\n *\n * @param {Html5} tech\n *        The tech object that sourceset is being setup on.\n */\n\n\nvar firstSourceWatch = function firstSourceWatch(tech) {\n  var el = tech.el(); // make sure firstSourceWatch isn't setup twice.\n\n  if (el.resetSourceWatch_) {\n    return;\n  }\n\n  var old = {};\n  var innerDescriptor = getInnerHTMLDescriptor(tech);\n\n  var appendWrapper = function appendWrapper(appendFn) {\n    return function () {\n      for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      var retval = appendFn.apply(el, args);\n      sourcesetLoad(tech);\n      return retval;\n    };\n  };\n\n  ['append', 'appendChild', 'insertAdjacentHTML'].forEach(function (k) {\n    if (!el[k]) {\n      return;\n    } // store the old function\n\n\n    old[k] = el[k]; // call the old function with a sourceset if a source\n    // was loaded\n\n    el[k] = appendWrapper(old[k]);\n  });\n  Object.defineProperty(el, 'innerHTML', mergeOptions(innerDescriptor, {\n    set: appendWrapper(innerDescriptor.set)\n  }));\n\n  el.resetSourceWatch_ = function () {\n    el.resetSourceWatch_ = null;\n    Object.keys(old).forEach(function (k) {\n      el[k] = old[k];\n    });\n    Object.defineProperty(el, 'innerHTML', innerDescriptor);\n  }; // on the first sourceset, we need to revert our changes\n\n\n  tech.one('sourceset', el.resetSourceWatch_);\n};\n/**\n * our implementation of a `src` descriptor for browsers\n * that do not have one.\n */\n\n\nvar srcDescriptorPolyfill = Object.defineProperty({}, 'src', {\n  get: function get() {\n    if (this.hasAttribute('src')) {\n      return getAbsoluteURL(window$1.Element.prototype.getAttribute.call(this, 'src'));\n    }\n\n    return '';\n  },\n  set: function set(v) {\n    window$1.Element.prototype.setAttribute.call(this, 'src', v);\n    return v;\n  }\n});\n\nvar getSrcDescriptor = function getSrcDescriptor(tech) {\n  return getDescriptor([tech.el(), window$1.HTMLMediaElement.prototype, srcDescriptorPolyfill], 'src');\n};\n/**\n * setup `sourceset` handling on the `Html5` tech. This function\n * patches the following element properties/functions:\n *\n * - `src` - to determine when `src` is set\n * - `setAttribute()` - to determine when `src` is set\n * - `load()` - this re-triggers the source selection algorithm, and can\n *              cause a sourceset.\n *\n * If there is no source when we are adding `sourceset` support or during a `load()`\n * we also patch the functions listed in `firstSourceWatch`.\n *\n * @param {Html5} tech\n *        The tech to patch\n */\n\n\nvar setupSourceset = function setupSourceset(tech) {\n  if (!tech.featuresSourceset) {\n    return;\n  }\n\n  var el = tech.el(); // make sure sourceset isn't setup twice.\n\n  if (el.resetSourceset_) {\n    return;\n  }\n\n  var srcDescriptor = getSrcDescriptor(tech);\n  var oldSetAttribute = el.setAttribute;\n  var oldLoad = el.load;\n  Object.defineProperty(el, 'src', mergeOptions(srcDescriptor, {\n    set: function set(v) {\n      var retval = srcDescriptor.set.call(el, v); // we use the getter here to get the actual value set on src\n\n      tech.triggerSourceset(el.src);\n      return retval;\n    }\n  }));\n\n  el.setAttribute = function (n, v) {\n    var retval = oldSetAttribute.call(el, n, v);\n\n    if (/src/i.test(n)) {\n      tech.triggerSourceset(el.src);\n    }\n\n    return retval;\n  };\n\n  el.load = function () {\n    var retval = oldLoad.call(el); // if load was called, but there was no source to fire\n    // sourceset on. We have to watch for a source append\n    // as that can trigger a `sourceset` when the media element\n    // has no source\n\n    if (!sourcesetLoad(tech)) {\n      tech.triggerSourceset('');\n      firstSourceWatch(tech);\n    }\n\n    return retval;\n  };\n\n  if (el.currentSrc) {\n    tech.triggerSourceset(el.currentSrc);\n  } else if (!sourcesetLoad(tech)) {\n    firstSourceWatch(tech);\n  }\n\n  el.resetSourceset_ = function () {\n    el.resetSourceset_ = null;\n    el.load = oldLoad;\n    el.setAttribute = oldSetAttribute;\n    Object.defineProperty(el, 'src', srcDescriptor);\n\n    if (el.resetSourceWatch_) {\n      el.resetSourceWatch_();\n    }\n  };\n};\n/**\n * HTML5 Media Controller - Wrapper for HTML5 Media API\n *\n * @mixes Tech~SourceHandlerAdditions\n * @extends Tech\n */\n\n\nvar Html5 =\n/*#__PURE__*/\nfunction (_Tech) {\n  _inheritsLoose(Html5, _Tech);\n  /**\n  * Create an instance of this Tech.\n  *\n  * @param {Object} [options]\n  *        The key/value store of player options.\n  *\n  * @param {Component~ReadyCallback} ready\n  *        Callback function to call when the `HTML5` Tech is ready.\n  */\n\n\n  function Html5(options, ready) {\n    var _this;\n\n    _this = _Tech.call(this, options, ready) || this;\n    var source = options.source;\n    var crossoriginTracks = false; // Set the source if one is provided\n    // 1) Check if the source is new (if not, we want to keep the original so playback isn't interrupted)\n    // 2) Check to see if the network state of the tag was failed at init, and if so, reset the source\n    // anyway so the error gets fired.\n\n    if (source && (_this.el_.currentSrc !== source.src || options.tag && options.tag.initNetworkState_ === 3)) {\n      _this.setSource(source);\n    } else {\n      _this.handleLateInit_(_this.el_);\n    } // setup sourceset after late sourceset/init\n\n\n    if (options.enableSourceset) {\n      _this.setupSourcesetHandling_();\n    }\n\n    if (_this.el_.hasChildNodes()) {\n      var nodes = _this.el_.childNodes;\n      var nodesLength = nodes.length;\n      var removeNodes = [];\n\n      while (nodesLength--) {\n        var node = nodes[nodesLength];\n        var nodeName = node.nodeName.toLowerCase();\n\n        if (nodeName === 'track') {\n          if (!_this.featuresNativeTextTracks) {\n            // Empty video tag tracks so the built-in player doesn't use them also.\n            // This may not be fast enough to stop HTML5 browsers from reading the tags\n            // so we'll need to turn off any default tracks if we're manually doing\n            // captions and subtitles. videoElement.textTracks\n            removeNodes.push(node);\n          } else {\n            // store HTMLTrackElement and TextTrack to remote list\n            _this.remoteTextTrackEls().addTrackElement_(node);\n\n            _this.remoteTextTracks().addTrack(node.track);\n\n            _this.textTracks().addTrack(node.track);\n\n            if (!crossoriginTracks && !_this.el_.hasAttribute('crossorigin') && isCrossOrigin(node.src)) {\n              crossoriginTracks = true;\n            }\n          }\n        }\n      }\n\n      for (var i = 0; i < removeNodes.length; i++) {\n        _this.el_.removeChild(removeNodes[i]);\n      }\n    }\n\n    _this.proxyNativeTracks_();\n\n    if (_this.featuresNativeTextTracks && crossoriginTracks) {\n      log.warn('Text Tracks are being loaded from another origin but the crossorigin attribute isn\\'t used.\\n' + 'This may prevent text tracks from loading.');\n    } // prevent iOS Safari from disabling metadata text tracks during native playback\n\n\n    _this.restoreMetadataTracksInIOSNativePlayer_(); // Determine if native controls should be used\n    // Our goal should be to get the custom controls on mobile solid everywhere\n    // so we can remove this all together. Right now this will block custom\n    // controls on touch enabled laptops like the Chrome Pixel\n\n\n    if ((TOUCH_ENABLED || IS_IPHONE || IS_NATIVE_ANDROID) && options.nativeControlsForTouch === true) {\n      _this.setControls(true);\n    } // on iOS, we want to proxy `webkitbeginfullscreen` and `webkitendfullscreen`\n    // into a `fullscreenchange` event\n\n\n    _this.proxyWebkitFullscreen_();\n\n    _this.triggerReady();\n\n    return _this;\n  }\n  /**\n   * Dispose of `HTML5` media element and remove all tracks.\n   */\n\n\n  var _proto = Html5.prototype;\n\n  _proto.dispose = function dispose() {\n    if (this.el_ && this.el_.resetSourceset_) {\n      this.el_.resetSourceset_();\n    }\n\n    Html5.disposeMediaElement(this.el_);\n    this.options_ = null; // tech will handle clearing of the emulated track list\n\n    _Tech.prototype.dispose.call(this);\n  }\n  /**\n   * Modify the media element so that we can detect when\n   * the source is changed. Fires `sourceset` just after the source has changed\n   */\n  ;\n\n  _proto.setupSourcesetHandling_ = function setupSourcesetHandling_() {\n    setupSourceset(this);\n  }\n  /**\n   * When a captions track is enabled in the iOS Safari native player, all other\n   * tracks are disabled (including metadata tracks), which nulls all of their\n   * associated cue points. This will restore metadata tracks to their pre-fullscreen\n   * state in those cases so that cue points are not needlessly lost.\n   *\n   * @private\n   */\n  ;\n\n  _proto.restoreMetadataTracksInIOSNativePlayer_ = function restoreMetadataTracksInIOSNativePlayer_() {\n    var textTracks = this.textTracks();\n    var metadataTracksPreFullscreenState; // captures a snapshot of every metadata track's current state\n\n    var takeMetadataTrackSnapshot = function takeMetadataTrackSnapshot() {\n      metadataTracksPreFullscreenState = [];\n\n      for (var i = 0; i < textTracks.length; i++) {\n        var track = textTracks[i];\n\n        if (track.kind === 'metadata') {\n          metadataTracksPreFullscreenState.push({\n            track: track,\n            storedMode: track.mode\n          });\n        }\n      }\n    }; // snapshot each metadata track's initial state, and update the snapshot\n    // each time there is a track 'change' event\n\n\n    takeMetadataTrackSnapshot();\n    textTracks.addEventListener('change', takeMetadataTrackSnapshot);\n    this.on('dispose', function () {\n      return textTracks.removeEventListener('change', takeMetadataTrackSnapshot);\n    });\n\n    var restoreTrackMode = function restoreTrackMode() {\n      for (var i = 0; i < metadataTracksPreFullscreenState.length; i++) {\n        var storedTrack = metadataTracksPreFullscreenState[i];\n\n        if (storedTrack.track.mode === 'disabled' && storedTrack.track.mode !== storedTrack.storedMode) {\n          storedTrack.track.mode = storedTrack.storedMode;\n        }\n      } // we only want this handler to be executed on the first 'change' event\n\n\n      textTracks.removeEventListener('change', restoreTrackMode);\n    }; // when we enter fullscreen playback, stop updating the snapshot and\n    // restore all track modes to their pre-fullscreen state\n\n\n    this.on('webkitbeginfullscreen', function () {\n      textTracks.removeEventListener('change', takeMetadataTrackSnapshot); // remove the listener before adding it just in case it wasn't previously removed\n\n      textTracks.removeEventListener('change', restoreTrackMode);\n      textTracks.addEventListener('change', restoreTrackMode);\n    }); // start updating the snapshot again after leaving fullscreen\n\n    this.on('webkitendfullscreen', function () {\n      // remove the listener before adding it just in case it wasn't previously removed\n      textTracks.removeEventListener('change', takeMetadataTrackSnapshot);\n      textTracks.addEventListener('change', takeMetadataTrackSnapshot); // remove the restoreTrackMode handler in case it wasn't triggered during fullscreen playback\n\n      textTracks.removeEventListener('change', restoreTrackMode);\n    });\n  }\n  /**\n   * Attempt to force override of tracks for the given type\n   *\n   * @param {string} type - Track type to override, possible values include 'Audio',\n   * 'Video', and 'Text'.\n   * @param {boolean} override - If set to true native audio/video will be overridden,\n   * otherwise native audio/video will potentially be used.\n   * @private\n   */\n  ;\n\n  _proto.overrideNative_ = function overrideNative_(type, override) {\n    var _this2 = this; // If there is no behavioral change don't add/remove listeners\n\n\n    if (override !== this[\"featuresNative\" + type + \"Tracks\"]) {\n      return;\n    }\n\n    var lowerCaseType = type.toLowerCase();\n\n    if (this[lowerCaseType + \"TracksListeners_\"]) {\n      Object.keys(this[lowerCaseType + \"TracksListeners_\"]).forEach(function (eventName) {\n        var elTracks = _this2.el()[lowerCaseType + \"Tracks\"];\n\n        elTracks.removeEventListener(eventName, _this2[lowerCaseType + \"TracksListeners_\"][eventName]);\n      });\n    }\n\n    this[\"featuresNative\" + type + \"Tracks\"] = !override;\n    this[lowerCaseType + \"TracksListeners_\"] = null;\n    this.proxyNativeTracksForType_(lowerCaseType);\n  }\n  /**\n   * Attempt to force override of native audio tracks.\n   *\n   * @param {boolean} override - If set to true native audio will be overridden,\n   * otherwise native audio will potentially be used.\n   */\n  ;\n\n  _proto.overrideNativeAudioTracks = function overrideNativeAudioTracks(override) {\n    this.overrideNative_('Audio', override);\n  }\n  /**\n   * Attempt to force override of native video tracks.\n   *\n   * @param {boolean} override - If set to true native video will be overridden,\n   * otherwise native video will potentially be used.\n   */\n  ;\n\n  _proto.overrideNativeVideoTracks = function overrideNativeVideoTracks(override) {\n    this.overrideNative_('Video', override);\n  }\n  /**\n   * Proxy native track list events for the given type to our track\n   * lists if the browser we are playing in supports that type of track list.\n   *\n   * @param {string} name - Track type; values include 'audio', 'video', and 'text'\n   * @private\n   */\n  ;\n\n  _proto.proxyNativeTracksForType_ = function proxyNativeTracksForType_(name) {\n    var _this3 = this;\n\n    var props = NORMAL[name];\n    var elTracks = this.el()[props.getterName];\n    var techTracks = this[props.getterName]();\n\n    if (!this[\"featuresNative\" + props.capitalName + \"Tracks\"] || !elTracks || !elTracks.addEventListener) {\n      return;\n    }\n\n    var listeners = {\n      change: function change(e) {\n        techTracks.trigger({\n          type: 'change',\n          target: techTracks,\n          currentTarget: techTracks,\n          srcElement: techTracks\n        });\n      },\n      addtrack: function addtrack(e) {\n        techTracks.addTrack(e.track);\n      },\n      removetrack: function removetrack(e) {\n        techTracks.removeTrack(e.track);\n      }\n    };\n\n    var removeOldTracks = function removeOldTracks() {\n      var removeTracks = [];\n\n      for (var i = 0; i < techTracks.length; i++) {\n        var found = false;\n\n        for (var j = 0; j < elTracks.length; j++) {\n          if (elTracks[j] === techTracks[i]) {\n            found = true;\n            break;\n          }\n        }\n\n        if (!found) {\n          removeTracks.push(techTracks[i]);\n        }\n      }\n\n      while (removeTracks.length) {\n        techTracks.removeTrack(removeTracks.shift());\n      }\n    };\n\n    this[props.getterName + 'Listeners_'] = listeners;\n    Object.keys(listeners).forEach(function (eventName) {\n      var listener = listeners[eventName];\n      elTracks.addEventListener(eventName, listener);\n\n      _this3.on('dispose', function (e) {\n        return elTracks.removeEventListener(eventName, listener);\n      });\n    }); // Remove (native) tracks that are not used anymore\n\n    this.on('loadstart', removeOldTracks);\n    this.on('dispose', function (e) {\n      return _this3.off('loadstart', removeOldTracks);\n    });\n  }\n  /**\n   * Proxy all native track list events to our track lists if the browser we are playing\n   * in supports that type of track list.\n   *\n   * @private\n   */\n  ;\n\n  _proto.proxyNativeTracks_ = function proxyNativeTracks_() {\n    var _this4 = this;\n\n    NORMAL.names.forEach(function (name) {\n      _this4.proxyNativeTracksForType_(name);\n    });\n  }\n  /**\n   * Create the `Html5` Tech's DOM element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    var el = this.options_.tag; // Check if this browser supports moving the element into the box.\n    // On the iPhone video will break if you move the element,\n    // So we have to create a brand new element.\n    // If we ingested the player div, we do not need to move the media element.\n\n    if (!el || !(this.options_.playerElIngest || this.movingMediaElementInDOM)) {\n      // If the original tag is still there, clone and remove it.\n      if (el) {\n        var clone = el.cloneNode(true);\n\n        if (el.parentNode) {\n          el.parentNode.insertBefore(clone, el);\n        }\n\n        Html5.disposeMediaElement(el);\n        el = clone;\n      } else {\n        el = document.createElement('video'); // determine if native controls should be used\n\n        var tagAttributes = this.options_.tag && getAttributes(this.options_.tag);\n        var attributes = mergeOptions({}, tagAttributes);\n\n        if (!TOUCH_ENABLED || this.options_.nativeControlsForTouch !== true) {\n          delete attributes.controls;\n        }\n\n        setAttributes(el, assign(attributes, {\n          id: this.options_.techId,\n          \"class\": 'vjs-tech'\n        }));\n      }\n\n      el.playerId = this.options_.playerId;\n    }\n\n    if (typeof this.options_.preload !== 'undefined') {\n      setAttribute(el, 'preload', this.options_.preload);\n    } // Update specific tag settings, in case they were overridden\n    // `autoplay` has to be *last* so that `muted` and `playsinline` are present\n    // when iOS/Safari or other browsers attempt to autoplay.\n\n\n    var settingsAttrs = ['loop', 'muted', 'playsinline', 'autoplay'];\n\n    for (var i = 0; i < settingsAttrs.length; i++) {\n      var attr = settingsAttrs[i];\n      var value = this.options_[attr];\n\n      if (typeof value !== 'undefined') {\n        if (value) {\n          setAttribute(el, attr, attr);\n        } else {\n          removeAttribute(el, attr);\n        }\n\n        el[attr] = value;\n      }\n    }\n\n    return el;\n  }\n  /**\n   * This will be triggered if the loadstart event has already fired, before videojs was\n   * ready. Two known examples of when this can happen are:\n   * 1. If we're loading the playback object after it has started loading\n   * 2. The media is already playing the (often with autoplay on) then\n   *\n   * This function will fire another loadstart so that videojs can catchup.\n   *\n   * @fires Tech#loadstart\n   *\n   * @return {undefined}\n   *         returns nothing.\n   */\n  ;\n\n  _proto.handleLateInit_ = function handleLateInit_(el) {\n    if (el.networkState === 0 || el.networkState === 3) {\n      // The video element hasn't started loading the source yet\n      // or didn't find a source\n      return;\n    }\n\n    if (el.readyState === 0) {\n      // NetworkState is set synchronously BUT loadstart is fired at the\n      // end of the current stack, usually before setInterval(fn, 0).\n      // So at this point we know loadstart may have already fired or is\n      // about to fire, and either way the player hasn't seen it yet.\n      // We don't want to fire loadstart prematurely here and cause a\n      // double loadstart so we'll wait and see if it happens between now\n      // and the next loop, and fire it if not.\n      // HOWEVER, we also want to make sure it fires before loadedmetadata\n      // which could also happen between now and the next loop, so we'll\n      // watch for that also.\n      var loadstartFired = false;\n\n      var setLoadstartFired = function setLoadstartFired() {\n        loadstartFired = true;\n      };\n\n      this.on('loadstart', setLoadstartFired);\n\n      var triggerLoadstart = function triggerLoadstart() {\n        // We did miss the original loadstart. Make sure the player\n        // sees loadstart before loadedmetadata\n        if (!loadstartFired) {\n          this.trigger('loadstart');\n        }\n      };\n\n      this.on('loadedmetadata', triggerLoadstart);\n      this.ready(function () {\n        this.off('loadstart', setLoadstartFired);\n        this.off('loadedmetadata', triggerLoadstart);\n\n        if (!loadstartFired) {\n          // We did miss the original native loadstart. Fire it now.\n          this.trigger('loadstart');\n        }\n      });\n      return;\n    } // From here on we know that loadstart already fired and we missed it.\n    // The other readyState events aren't as much of a problem if we double\n    // them, so not going to go to as much trouble as loadstart to prevent\n    // that unless we find reason to.\n\n\n    var eventsToTrigger = ['loadstart']; // loadedmetadata: newly equal to HAVE_METADATA (1) or greater\n\n    eventsToTrigger.push('loadedmetadata'); // loadeddata: newly increased to HAVE_CURRENT_DATA (2) or greater\n\n    if (el.readyState >= 2) {\n      eventsToTrigger.push('loadeddata');\n    } // canplay: newly increased to HAVE_FUTURE_DATA (3) or greater\n\n\n    if (el.readyState >= 3) {\n      eventsToTrigger.push('canplay');\n    } // canplaythrough: newly equal to HAVE_ENOUGH_DATA (4)\n\n\n    if (el.readyState >= 4) {\n      eventsToTrigger.push('canplaythrough');\n    } // We still need to give the player time to add event listeners\n\n\n    this.ready(function () {\n      eventsToTrigger.forEach(function (type) {\n        this.trigger(type);\n      }, this);\n    });\n  }\n  /**\n   * Set current time for the `HTML5` tech.\n   *\n   * @param {number} seconds\n   *        Set the current time of the media to this.\n   */\n  ;\n\n  _proto.setCurrentTime = function setCurrentTime(seconds) {\n    try {\n      this.el_.currentTime = seconds;\n    } catch (e) {\n      log(e, 'Video is not ready. (Video.js)'); // this.warning(VideoJS.warnings.videoNotReady);\n    }\n  }\n  /**\n   * Get the current duration of the HTML5 media element.\n   *\n   * @return {number}\n   *         The duration of the media or 0 if there is no duration.\n   */\n  ;\n\n  _proto.duration = function duration() {\n    var _this5 = this; // Android Chrome will report duration as Infinity for VOD HLS until after\n    // playback has started, which triggers the live display erroneously.\n    // Return NaN if playback has not started and trigger a durationupdate once\n    // the duration can be reliably known.\n\n\n    if (this.el_.duration === Infinity && IS_ANDROID && IS_CHROME && this.el_.currentTime === 0) {\n      // Wait for the first `timeupdate` with currentTime > 0 - there may be\n      // several with 0\n      var checkProgress = function checkProgress() {\n        if (_this5.el_.currentTime > 0) {\n          // Trigger durationchange for genuinely live video\n          if (_this5.el_.duration === Infinity) {\n            _this5.trigger('durationchange');\n          }\n\n          _this5.off('timeupdate', checkProgress);\n        }\n      };\n\n      this.on('timeupdate', checkProgress);\n      return NaN;\n    }\n\n    return this.el_.duration || NaN;\n  }\n  /**\n   * Get the current width of the HTML5 media element.\n   *\n   * @return {number}\n   *         The width of the HTML5 media element.\n   */\n  ;\n\n  _proto.width = function width() {\n    return this.el_.offsetWidth;\n  }\n  /**\n   * Get the current height of the HTML5 media element.\n   *\n   * @return {number}\n   *         The height of the HTML5 media element.\n   */\n  ;\n\n  _proto.height = function height() {\n    return this.el_.offsetHeight;\n  }\n  /**\n   * Proxy iOS `webkitbeginfullscreen` and `webkitendfullscreen` into\n   * `fullscreenchange` event.\n   *\n   * @private\n   * @fires fullscreenchange\n   * @listens webkitendfullscreen\n   * @listens webkitbeginfullscreen\n   * @listens webkitbeginfullscreen\n   */\n  ;\n\n  _proto.proxyWebkitFullscreen_ = function proxyWebkitFullscreen_() {\n    var _this6 = this;\n\n    if (!('webkitDisplayingFullscreen' in this.el_)) {\n      return;\n    }\n\n    var endFn = function endFn() {\n      this.trigger('fullscreenchange', {\n        isFullscreen: false\n      });\n    };\n\n    var beginFn = function beginFn() {\n      if ('webkitPresentationMode' in this.el_ && this.el_.webkitPresentationMode !== 'picture-in-picture') {\n        this.one('webkitendfullscreen', endFn);\n        this.trigger('fullscreenchange', {\n          isFullscreen: true\n        });\n      }\n    };\n\n    this.on('webkitbeginfullscreen', beginFn);\n    this.on('dispose', function () {\n      _this6.off('webkitbeginfullscreen', beginFn);\n\n      _this6.off('webkitendfullscreen', endFn);\n    });\n  }\n  /**\n   * Check if fullscreen is supported on the current playback device.\n   *\n   * @return {boolean}\n   *         - True if fullscreen is supported.\n   *         - False if fullscreen is not supported.\n   */\n  ;\n\n  _proto.supportsFullScreen = function supportsFullScreen() {\n    if (typeof this.el_.webkitEnterFullScreen === 'function') {\n      var userAgent = window$1.navigator && window$1.navigator.userAgent || ''; // Seems to be broken in Chromium/Chrome && Safari in Leopard\n\n      if (/Android/.test(userAgent) || !/Chrome|Mac OS X 10.5/.test(userAgent)) {\n        return true;\n      }\n    }\n\n    return false;\n  }\n  /**\n   * Request that the `HTML5` Tech enter fullscreen.\n   */\n  ;\n\n  _proto.enterFullScreen = function enterFullScreen() {\n    var video = this.el_;\n\n    if (video.paused && video.networkState <= video.HAVE_METADATA) {\n      // attempt to prime the video element for programmatic access\n      // this isn't necessary on the desktop but shouldn't hurt\n      this.el_.play(); // playing and pausing synchronously during the transition to fullscreen\n      // can get iOS ~6.1 devices into a play/pause loop\n\n      this.setTimeout(function () {\n        video.pause();\n        video.webkitEnterFullScreen();\n      }, 0);\n    } else {\n      video.webkitEnterFullScreen();\n    }\n  }\n  /**\n   * Request that the `HTML5` Tech exit fullscreen.\n   */\n  ;\n\n  _proto.exitFullScreen = function exitFullScreen() {\n    this.el_.webkitExitFullScreen();\n  }\n  /**\n   * Create a floating video window always on top of other windows so that users may\n   * continue consuming media while they interact with other content sites, or\n   * applications on their device.\n   *\n   * @see [Spec]{@link https://wicg.github.io/picture-in-picture}\n   *\n   * @return {Promise}\n   *         A promise with a Picture-in-Picture window.\n   */\n  ;\n\n  _proto.requestPictureInPicture = function requestPictureInPicture() {\n    return this.el_.requestPictureInPicture();\n  }\n  /**\n   * A getter/setter for the `Html5` Tech's source object.\n   * > Note: Please use {@link Html5#setSource}\n   *\n   * @param {Tech~SourceObject} [src]\n   *        The source object you want to set on the `HTML5` techs element.\n   *\n   * @return {Tech~SourceObject|undefined}\n   *         - The current source object when a source is not passed in.\n   *         - undefined when setting\n   *\n   * @deprecated Since version 5.\n   */\n  ;\n\n  _proto.src = function src(_src) {\n    if (_src === undefined) {\n      return this.el_.src;\n    } // Setting src through `src` instead of `setSrc` will be deprecated\n\n\n    this.setSrc(_src);\n  }\n  /**\n   * Reset the tech by removing all sources and then calling\n   * {@link Html5.resetMediaElement}.\n   */\n  ;\n\n  _proto.reset = function reset() {\n    Html5.resetMediaElement(this.el_);\n  }\n  /**\n   * Get the current source on the `HTML5` Tech. Falls back to returning the source from\n   * the HTML5 media element.\n   *\n   * @return {Tech~SourceObject}\n   *         The current source object from the HTML5 tech. With a fallback to the\n   *         elements source.\n   */\n  ;\n\n  _proto.currentSrc = function currentSrc() {\n    if (this.currentSource_) {\n      return this.currentSource_.src;\n    }\n\n    return this.el_.currentSrc;\n  }\n  /**\n   * Set controls attribute for the HTML5 media Element.\n   *\n   * @param {string} val\n   *        Value to set the controls attribute to\n   */\n  ;\n\n  _proto.setControls = function setControls(val) {\n    this.el_.controls = !!val;\n  }\n  /**\n   * Create and returns a remote {@link TextTrack} object.\n   *\n   * @param {string} kind\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n   *\n   * @param {string} [label]\n   *        Label to identify the text track\n   *\n   * @param {string} [language]\n   *        Two letter language abbreviation\n   *\n   * @return {TextTrack}\n   *         The TextTrack that gets created.\n   */\n  ;\n\n  _proto.addTextTrack = function addTextTrack(kind, label, language) {\n    if (!this.featuresNativeTextTracks) {\n      return _Tech.prototype.addTextTrack.call(this, kind, label, language);\n    }\n\n    return this.el_.addTextTrack(kind, label, language);\n  }\n  /**\n   * Creates either native TextTrack or an emulated TextTrack depending\n   * on the value of `featuresNativeTextTracks`\n   *\n   * @param {Object} options\n   *        The object should contain the options to initialize the TextTrack with.\n   *\n   * @param {string} [options.kind]\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata).\n   *\n   * @param {string} [options.label]\n   *        Label to identify the text track\n   *\n   * @param {string} [options.language]\n   *        Two letter language abbreviation.\n   *\n   * @param {boolean} [options.default]\n   *        Default this track to on.\n   *\n   * @param {string} [options.id]\n   *        The internal id to assign this track.\n   *\n   * @param {string} [options.src]\n   *        A source url for the track.\n   *\n   * @return {HTMLTrackElement}\n   *         The track element that gets created.\n   */\n  ;\n\n  _proto.createRemoteTextTrack = function createRemoteTextTrack(options) {\n    if (!this.featuresNativeTextTracks) {\n      return _Tech.prototype.createRemoteTextTrack.call(this, options);\n    }\n\n    var htmlTrackElement = document.createElement('track');\n\n    if (options.kind) {\n      htmlTrackElement.kind = options.kind;\n    }\n\n    if (options.label) {\n      htmlTrackElement.label = options.label;\n    }\n\n    if (options.language || options.srclang) {\n      htmlTrackElement.srclang = options.language || options.srclang;\n    }\n\n    if (options[\"default\"]) {\n      htmlTrackElement[\"default\"] = options[\"default\"];\n    }\n\n    if (options.id) {\n      htmlTrackElement.id = options.id;\n    }\n\n    if (options.src) {\n      htmlTrackElement.src = options.src;\n    }\n\n    return htmlTrackElement;\n  }\n  /**\n   * Creates a remote text track object and returns an html track element.\n   *\n   * @param {Object} options The object should contain values for\n   * kind, language, label, and src (location of the WebVTT file)\n   * @param {boolean} [manualCleanup=true] if set to false, the TextTrack will be\n   * automatically removed from the video element whenever the source changes\n   * @return {HTMLTrackElement} An Html Track Element.\n   * This can be an emulated {@link HTMLTrackElement} or a native one.\n   * @deprecated The default value of the \"manualCleanup\" parameter will default\n   * to \"false\" in upcoming versions of Video.js\n   */\n  ;\n\n  _proto.addRemoteTextTrack = function addRemoteTextTrack(options, manualCleanup) {\n    var htmlTrackElement = _Tech.prototype.addRemoteTextTrack.call(this, options, manualCleanup);\n\n    if (this.featuresNativeTextTracks) {\n      this.el().appendChild(htmlTrackElement);\n    }\n\n    return htmlTrackElement;\n  }\n  /**\n   * Remove remote `TextTrack` from `TextTrackList` object\n   *\n   * @param {TextTrack} track\n   *        `TextTrack` object to remove\n   */\n  ;\n\n  _proto.removeRemoteTextTrack = function removeRemoteTextTrack(track) {\n    _Tech.prototype.removeRemoteTextTrack.call(this, track);\n\n    if (this.featuresNativeTextTracks) {\n      var tracks = this.$$('track');\n      var i = tracks.length;\n\n      while (i--) {\n        if (track === tracks[i] || track === tracks[i].track) {\n          this.el().removeChild(tracks[i]);\n        }\n      }\n    }\n  }\n  /**\n   * Gets available media playback quality metrics as specified by the W3C's Media\n   * Playback Quality API.\n   *\n   * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n   *\n   * @return {Object}\n   *         An object with supported media playback quality metrics\n   */\n  ;\n\n  _proto.getVideoPlaybackQuality = function getVideoPlaybackQuality() {\n    if (typeof this.el().getVideoPlaybackQuality === 'function') {\n      return this.el().getVideoPlaybackQuality();\n    }\n\n    var videoPlaybackQuality = {};\n\n    if (typeof this.el().webkitDroppedFrameCount !== 'undefined' && typeof this.el().webkitDecodedFrameCount !== 'undefined') {\n      videoPlaybackQuality.droppedVideoFrames = this.el().webkitDroppedFrameCount;\n      videoPlaybackQuality.totalVideoFrames = this.el().webkitDecodedFrameCount;\n    }\n\n    if (window$1.performance && typeof window$1.performance.now === 'function') {\n      videoPlaybackQuality.creationTime = window$1.performance.now();\n    } else if (window$1.performance && window$1.performance.timing && typeof window$1.performance.timing.navigationStart === 'number') {\n      videoPlaybackQuality.creationTime = window$1.Date.now() - window$1.performance.timing.navigationStart;\n    }\n\n    return videoPlaybackQuality;\n  };\n\n  return Html5;\n}(Tech);\n/* HTML5 Support Testing ---------------------------------------------------- */\n\n\nif (isReal()) {\n  /**\n   * Element for testing browser HTML5 media capabilities\n   *\n   * @type {Element}\n   * @constant\n   * @private\n   */\n  Html5.TEST_VID = document.createElement('video');\n  var track = document.createElement('track');\n  track.kind = 'captions';\n  track.srclang = 'en';\n  track.label = 'English';\n  Html5.TEST_VID.appendChild(track);\n}\n/**\n * Check if HTML5 media is supported by this browser/device.\n *\n * @return {boolean}\n *         - True if HTML5 media is supported.\n *         - False if HTML5 media is not supported.\n */\n\n\nHtml5.isSupported = function () {\n  // IE with no Media Player is a LIAR! (#984)\n  try {\n    Html5.TEST_VID.volume = 0.5;\n  } catch (e) {\n    return false;\n  }\n\n  return !!(Html5.TEST_VID && Html5.TEST_VID.canPlayType);\n};\n/**\n * Check if the tech can support the given type\n *\n * @param {string} type\n *        The mimetype to check\n * @return {string} 'probably', 'maybe', or '' (empty string)\n */\n\n\nHtml5.canPlayType = function (type) {\n  return Html5.TEST_VID.canPlayType(type);\n};\n/**\n * Check if the tech can support the given source\n *\n * @param {Object} srcObj\n *        The source object\n * @param {Object} options\n *        The options passed to the tech\n * @return {string} 'probably', 'maybe', or '' (empty string)\n */\n\n\nHtml5.canPlaySource = function (srcObj, options) {\n  return Html5.canPlayType(srcObj.type);\n};\n/**\n * Check if the volume can be changed in this browser/device.\n * Volume cannot be changed in a lot of mobile devices.\n * Specifically, it can't be changed from 1 on iOS.\n *\n * @return {boolean}\n *         - True if volume can be controlled\n *         - False otherwise\n */\n\n\nHtml5.canControlVolume = function () {\n  // IE will error if Windows Media Player not installed #3315\n  try {\n    var volume = Html5.TEST_VID.volume;\n    Html5.TEST_VID.volume = volume / 2 + 0.1;\n    return volume !== Html5.TEST_VID.volume;\n  } catch (e) {\n    return false;\n  }\n};\n/**\n * Check if the volume can be muted in this browser/device.\n * Some devices, e.g. iOS, don't allow changing volume\n * but permits muting/unmuting.\n *\n * @return {bolean}\n *      - True if volume can be muted\n *      - False otherwise\n */\n\n\nHtml5.canMuteVolume = function () {\n  try {\n    var muted = Html5.TEST_VID.muted; // in some versions of iOS muted property doesn't always\n    // work, so we want to set both property and attribute\n\n    Html5.TEST_VID.muted = !muted;\n\n    if (Html5.TEST_VID.muted) {\n      setAttribute(Html5.TEST_VID, 'muted', 'muted');\n    } else {\n      removeAttribute(Html5.TEST_VID, 'muted', 'muted');\n    }\n\n    return muted !== Html5.TEST_VID.muted;\n  } catch (e) {\n    return false;\n  }\n};\n/**\n * Check if the playback rate can be changed in this browser/device.\n *\n * @return {boolean}\n *         - True if playback rate can be controlled\n *         - False otherwise\n */\n\n\nHtml5.canControlPlaybackRate = function () {\n  // Playback rate API is implemented in Android Chrome, but doesn't do anything\n  // https://github.com/videojs/video.js/issues/3180\n  if (IS_ANDROID && IS_CHROME && CHROME_VERSION < 58) {\n    return false;\n  } // IE will error if Windows Media Player not installed #3315\n\n\n  try {\n    var playbackRate = Html5.TEST_VID.playbackRate;\n    Html5.TEST_VID.playbackRate = playbackRate / 2 + 0.1;\n    return playbackRate !== Html5.TEST_VID.playbackRate;\n  } catch (e) {\n    return false;\n  }\n};\n/**\n * Check if we can override a video/audio elements attributes, with\n * Object.defineProperty.\n *\n * @return {boolean}\n *         - True if builtin attributes can be overridden\n *         - False otherwise\n */\n\n\nHtml5.canOverrideAttributes = function () {\n  // if we cannot overwrite the src/innerHTML property, there is no support\n  // iOS 7 safari for instance cannot do this.\n  try {\n    var noop = function noop() {};\n\n    Object.defineProperty(document.createElement('video'), 'src', {\n      get: noop,\n      set: noop\n    });\n    Object.defineProperty(document.createElement('audio'), 'src', {\n      get: noop,\n      set: noop\n    });\n    Object.defineProperty(document.createElement('video'), 'innerHTML', {\n      get: noop,\n      set: noop\n    });\n    Object.defineProperty(document.createElement('audio'), 'innerHTML', {\n      get: noop,\n      set: noop\n    });\n  } catch (e) {\n    return false;\n  }\n\n  return true;\n};\n/**\n * Check to see if native `TextTrack`s are supported by this browser/device.\n *\n * @return {boolean}\n *         - True if native `TextTrack`s are supported.\n *         - False otherwise\n */\n\n\nHtml5.supportsNativeTextTracks = function () {\n  return IS_ANY_SAFARI || IS_IOS && IS_CHROME;\n};\n/**\n * Check to see if native `VideoTrack`s are supported by this browser/device\n *\n * @return {boolean}\n *        - True if native `VideoTrack`s are supported.\n *        - False otherwise\n */\n\n\nHtml5.supportsNativeVideoTracks = function () {\n  return !!(Html5.TEST_VID && Html5.TEST_VID.videoTracks);\n};\n/**\n * Check to see if native `AudioTrack`s are supported by this browser/device\n *\n * @return {boolean}\n *        - True if native `AudioTrack`s are supported.\n *        - False otherwise\n */\n\n\nHtml5.supportsNativeAudioTracks = function () {\n  return !!(Html5.TEST_VID && Html5.TEST_VID.audioTracks);\n};\n/**\n * An array of events available on the Html5 tech.\n *\n * @private\n * @type {Array}\n */\n\n\nHtml5.Events = ['loadstart', 'suspend', 'abort', 'error', 'emptied', 'stalled', 'loadedmetadata', 'loadeddata', 'canplay', 'canplaythrough', 'playing', 'waiting', 'seeking', 'seeked', 'ended', 'durationchange', 'timeupdate', 'progress', 'play', 'pause', 'ratechange', 'resize', 'volumechange'];\n/**\n * Boolean indicating whether the `Tech` supports volume control.\n *\n * @type {boolean}\n * @default {@link Html5.canControlVolume}\n */\n\nHtml5.prototype.featuresVolumeControl = Html5.canControlVolume();\n/**\n * Boolean indicating whether the `Tech` supports muting volume.\n *\n * @type {bolean}\n * @default {@link Html5.canMuteVolume}\n */\n\nHtml5.prototype.featuresMuteControl = Html5.canMuteVolume();\n/**\n * Boolean indicating whether the `Tech` supports changing the speed at which the media\n * plays. Examples:\n *   - Set player to play 2x (twice) as fast\n *   - Set player to play 0.5x (half) as fast\n *\n * @type {boolean}\n * @default {@link Html5.canControlPlaybackRate}\n */\n\nHtml5.prototype.featuresPlaybackRate = Html5.canControlPlaybackRate();\n/**\n * Boolean indicating whether the `Tech` supports the `sourceset` event.\n *\n * @type {boolean}\n * @default\n */\n\nHtml5.prototype.featuresSourceset = Html5.canOverrideAttributes();\n/**\n * Boolean indicating whether the `HTML5` tech currently supports the media element\n * moving in the DOM. iOS breaks if you move the media element, so this is set this to\n * false there. Everywhere else this should be true.\n *\n * @type {boolean}\n * @default\n */\n\nHtml5.prototype.movingMediaElementInDOM = !IS_IOS; // TODO: Previous comment: No longer appears to be used. Can probably be removed.\n//       Is this true?\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports automatic media resize\n * when going into fullscreen.\n *\n * @type {boolean}\n * @default\n */\n\nHtml5.prototype.featuresFullscreenResize = true;\n/**\n * Boolean indicating whether the `HTML5` tech currently supports the progress event.\n * If this is false, manual `progress` events will be triggered instead.\n *\n * @type {boolean}\n * @default\n */\n\nHtml5.prototype.featuresProgressEvents = true;\n/**\n * Boolean indicating whether the `HTML5` tech currently supports the timeupdate event.\n * If this is false, manual `timeupdate` events will be triggered instead.\n *\n * @default\n */\n\nHtml5.prototype.featuresTimeupdateEvents = true;\n/**\n * Boolean indicating whether the `HTML5` tech currently supports native `TextTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeTextTracks}\n */\n\nHtml5.prototype.featuresNativeTextTracks = Html5.supportsNativeTextTracks();\n/**\n * Boolean indicating whether the `HTML5` tech currently supports native `VideoTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeVideoTracks}\n */\n\nHtml5.prototype.featuresNativeVideoTracks = Html5.supportsNativeVideoTracks();\n/**\n * Boolean indicating whether the `HTML5` tech currently supports native `AudioTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeAudioTracks}\n */\n\nHtml5.prototype.featuresNativeAudioTracks = Html5.supportsNativeAudioTracks(); // HTML5 Feature detection and Device Fixes --------------------------------- //\n\nvar canPlayType = Html5.TEST_VID && Html5.TEST_VID.constructor.prototype.canPlayType;\nvar mpegurlRE = /^application\\/(?:x-|vnd\\.apple\\.)mpegurl/i;\n\nHtml5.patchCanPlayType = function () {\n  // Android 4.0 and above can play HLS to some extent but it reports being unable to do so\n  // Firefox and Chrome report correctly\n  if (ANDROID_VERSION >= 4.0 && !IS_FIREFOX && !IS_CHROME) {\n    Html5.TEST_VID.constructor.prototype.canPlayType = function (type) {\n      if (type && mpegurlRE.test(type)) {\n        return 'maybe';\n      }\n\n      return canPlayType.call(this, type);\n    };\n  }\n};\n\nHtml5.unpatchCanPlayType = function () {\n  var r = Html5.TEST_VID.constructor.prototype.canPlayType;\n  Html5.TEST_VID.constructor.prototype.canPlayType = canPlayType;\n  return r;\n}; // by default, patch the media element\n\n\nHtml5.patchCanPlayType();\n\nHtml5.disposeMediaElement = function (el) {\n  if (!el) {\n    return;\n  }\n\n  if (el.parentNode) {\n    el.parentNode.removeChild(el);\n  } // remove any child track or source nodes to prevent their loading\n\n\n  while (el.hasChildNodes()) {\n    el.removeChild(el.firstChild);\n  } // remove any src reference. not setting `src=''` because that causes a warning\n  // in firefox\n\n\n  el.removeAttribute('src'); // force the media element to update its loading state by calling load()\n  // however IE on Windows 7N has a bug that throws an error so need a try/catch (#793)\n\n  if (typeof el.load === 'function') {\n    // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)\n    (function () {\n      try {\n        el.load();\n      } catch (e) {// not supported\n      }\n    })();\n  }\n};\n\nHtml5.resetMediaElement = function (el) {\n  if (!el) {\n    return;\n  }\n\n  var sources = el.querySelectorAll('source');\n  var i = sources.length;\n\n  while (i--) {\n    el.removeChild(sources[i]);\n  } // remove any src reference.\n  // not setting `src=''` because that throws an error\n\n\n  el.removeAttribute('src');\n\n  if (typeof el.load === 'function') {\n    // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)\n    (function () {\n      try {\n        el.load();\n      } catch (e) {// satisfy linter\n      }\n    })();\n  }\n};\n/* Native HTML5 element property wrapping ----------------------------------- */\n// Wrap native boolean attributes with getters that check both property and attribute\n// The list is as followed:\n// muted, defaultMuted, autoplay, controls, loop, playsinline\n\n\n[\n/**\n * Get the value of `muted` from the media element. `muted` indicates\n * that the volume for the media should be set to silent. This does not actually change\n * the `volume` attribute.\n *\n * @method Html5#muted\n * @return {boolean}\n *         - True if the value of `volume` should be ignored and the audio set to silent.\n *         - False if the value of `volume` should be used.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-muted}\n */\n'muted',\n/**\n * Get the value of `defaultMuted` from the media element. `defaultMuted` indicates\n * whether the media should start muted or not. Only changes the default state of the\n * media. `muted` and `defaultMuted` can have different values. {@link Html5#muted} indicates the\n * current state.\n *\n * @method Html5#defaultMuted\n * @return {boolean}\n *         - The value of `defaultMuted` from the media element.\n *         - True indicates that the media should start muted.\n *         - False indicates that the media should not start muted\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultmuted}\n */\n'defaultMuted',\n/**\n * Get the value of `autoplay` from the media element. `autoplay` indicates\n * that the media should start to play as soon as the page is ready.\n *\n * @method Html5#autoplay\n * @return {boolean}\n *         - The value of `autoplay` from the media element.\n *         - True indicates that the media should start as soon as the page loads.\n *         - False indicates that the media should not start as soon as the page loads.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-autoplay}\n */\n'autoplay',\n/**\n * Get the value of `controls` from the media element. `controls` indicates\n * whether the native media controls should be shown or hidden.\n *\n * @method Html5#controls\n * @return {boolean}\n *         - The value of `controls` from the media element.\n *         - True indicates that native controls should be showing.\n *         - False indicates that native controls should be hidden.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-controls}\n */\n'controls',\n/**\n * Get the value of `loop` from the media element. `loop` indicates\n * that the media should return to the start of the media and continue playing once\n * it reaches the end.\n *\n * @method Html5#loop\n * @return {boolean}\n *         - The value of `loop` from the media element.\n *         - True indicates that playback should seek back to start once\n *           the end of a media is reached.\n *         - False indicates that playback should not loop back to the start when the\n *           end of the media is reached.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-loop}\n */\n'loop',\n/**\n * Get the value of `playsinline` from the media element. `playsinline` indicates\n * to the browser that non-fullscreen playback is preferred when fullscreen\n * playback is the native default, such as in iOS Safari.\n *\n * @method Html5#playsinline\n * @return {boolean}\n *         - The value of `playsinline` from the media element.\n *         - True indicates that the media should play inline.\n *         - False indicates that the media should not play inline.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n */\n'playsinline'].forEach(function (prop) {\n  Html5.prototype[prop] = function () {\n    return this.el_[prop] || this.el_.hasAttribute(prop);\n  };\n}); // Wrap native boolean attributes with setters that set both property and attribute\n// The list is as followed:\n// setMuted, setDefaultMuted, setAutoplay, setLoop, setPlaysinline\n// setControls is special-cased above\n\n[\n/**\n * Set the value of `muted` on the media element. `muted` indicates that the current\n * audio level should be silent.\n *\n * @method Html5#setMuted\n * @param {boolean} muted\n *        - True if the audio should be set to silent\n *        - False otherwise\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-muted}\n */\n'muted',\n/**\n * Set the value of `defaultMuted` on the media element. `defaultMuted` indicates that the current\n * audio level should be silent, but will only effect the muted level on intial playback..\n *\n * @method Html5.prototype.setDefaultMuted\n * @param {boolean} defaultMuted\n *        - True if the audio should be set to silent\n *        - False otherwise\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultmuted}\n */\n'defaultMuted',\n/**\n * Set the value of `autoplay` on the media element. `autoplay` indicates\n * that the media should start to play as soon as the page is ready.\n *\n * @method Html5#setAutoplay\n * @param {boolean} autoplay\n *         - True indicates that the media should start as soon as the page loads.\n *         - False indicates that the media should not start as soon as the page loads.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-autoplay}\n */\n'autoplay',\n/**\n * Set the value of `loop` on the media element. `loop` indicates\n * that the media should return to the start of the media and continue playing once\n * it reaches the end.\n *\n * @method Html5#setLoop\n * @param {boolean} loop\n *         - True indicates that playback should seek back to start once\n *           the end of a media is reached.\n *         - False indicates that playback should not loop back to the start when the\n *           end of the media is reached.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-loop}\n */\n'loop',\n/**\n * Set the value of `playsinline` from the media element. `playsinline` indicates\n * to the browser that non-fullscreen playback is preferred when fullscreen\n * playback is the native default, such as in iOS Safari.\n *\n * @method Html5#setPlaysinline\n * @param {boolean} playsinline\n *         - True indicates that the media should play inline.\n *         - False indicates that the media should not play inline.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n */\n'playsinline'].forEach(function (prop) {\n  Html5.prototype['set' + toTitleCase(prop)] = function (v) {\n    this.el_[prop] = v;\n\n    if (v) {\n      this.el_.setAttribute(prop, prop);\n    } else {\n      this.el_.removeAttribute(prop);\n    }\n  };\n}); // Wrap native properties with a getter\n// The list is as followed\n// paused, currentTime, buffered, volume, poster, preload, error, seeking\n// seekable, ended, playbackRate, defaultPlaybackRate, played, networkState\n// readyState, videoWidth, videoHeight\n\n[\n/**\n * Get the value of `paused` from the media element. `paused` indicates whether the media element\n * is currently paused or not.\n *\n * @method Html5#paused\n * @return {boolean}\n *         The value of `paused` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-paused}\n */\n'paused',\n/**\n * Get the value of `currentTime` from the media element. `currentTime` indicates\n * the current second that the media is at in playback.\n *\n * @method Html5#currentTime\n * @return {number}\n *         The value of `currentTime` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-currenttime}\n */\n'currentTime',\n/**\n * Get the value of `buffered` from the media element. `buffered` is a `TimeRange`\n * object that represents the parts of the media that are already downloaded and\n * available for playback.\n *\n * @method Html5#buffered\n * @return {TimeRange}\n *         The value of `buffered` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-buffered}\n */\n'buffered',\n/**\n * Get the value of `volume` from the media element. `volume` indicates\n * the current playback volume of audio for a media. `volume` will be a value from 0\n * (silent) to 1 (loudest and default).\n *\n * @method Html5#volume\n * @return {number}\n *         The value of `volume` from the media element. Value will be between 0-1.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-a-volume}\n */\n'volume',\n/**\n * Get the value of `poster` from the media element. `poster` indicates\n * that the url of an image file that can/will be shown when no media data is available.\n *\n * @method Html5#poster\n * @return {string}\n *         The value of `poster` from the media element. Value will be a url to an\n *         image.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-video-poster}\n */\n'poster',\n/**\n * Get the value of `preload` from the media element. `preload` indicates\n * what should download before the media is interacted with. It can have the following\n * values:\n * - none: nothing should be downloaded\n * - metadata: poster and the first few frames of the media may be downloaded to get\n *   media dimensions and other metadata\n * - auto: allow the media and metadata for the media to be downloaded before\n *    interaction\n *\n * @method Html5#preload\n * @return {string}\n *         The value of `preload` from the media element. Will be 'none', 'metadata',\n *         or 'auto'.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-preload}\n */\n'preload',\n/**\n * Get the value of the `error` from the media element. `error` indicates any\n * MediaError that may have occurred during playback. If error returns null there is no\n * current error.\n *\n * @method Html5#error\n * @return {MediaError|null}\n *         The value of `error` from the media element. Will be `MediaError` if there\n *         is a current error and null otherwise.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-error}\n */\n'error',\n/**\n * Get the value of `seeking` from the media element. `seeking` indicates whether the\n * media is currently seeking to a new position or not.\n *\n * @method Html5#seeking\n * @return {boolean}\n *         - The value of `seeking` from the media element.\n *         - True indicates that the media is currently seeking to a new position.\n *         - False indicates that the media is not seeking to a new position at this time.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-seeking}\n */\n'seeking',\n/**\n * Get the value of `seekable` from the media element. `seekable` returns a\n * `TimeRange` object indicating ranges of time that can currently be `seeked` to.\n *\n * @method Html5#seekable\n * @return {TimeRange}\n *         The value of `seekable` from the media element. A `TimeRange` object\n *         indicating the current ranges of time that can be seeked to.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-seekable}\n */\n'seekable',\n/**\n * Get the value of `ended` from the media element. `ended` indicates whether\n * the media has reached the end or not.\n *\n * @method Html5#ended\n * @return {boolean}\n *         - The value of `ended` from the media element.\n *         - True indicates that the media has ended.\n *         - False indicates that the media has not ended.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-ended}\n */\n'ended',\n/**\n * Get the value of `playbackRate` from the media element. `playbackRate` indicates\n * the rate at which the media is currently playing back. Examples:\n *   - if playbackRate is set to 2, media will play twice as fast.\n *   - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5#playbackRate\n * @return {number}\n *         The value of `playbackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n'playbackRate',\n/**\n * Get the value of `defaultPlaybackRate` from the media element. `defaultPlaybackRate` indicates\n * the rate at which the media is currently playing back. This value will not indicate the current\n * `playbackRate` after playback has started, use {@link Html5#playbackRate} for that.\n *\n * Examples:\n *   - if defaultPlaybackRate is set to 2, media will play twice as fast.\n *   - if defaultPlaybackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5.prototype.defaultPlaybackRate\n * @return {number}\n *         The value of `defaultPlaybackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n'defaultPlaybackRate',\n/**\n * Get the value of `played` from the media element. `played` returns a `TimeRange`\n * object representing points in the media timeline that have been played.\n *\n * @method Html5#played\n * @return {TimeRange}\n *         The value of `played` from the media element. A `TimeRange` object indicating\n *         the ranges of time that have been played.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-played}\n */\n'played',\n/**\n * Get the value of `networkState` from the media element. `networkState` indicates\n * the current network state. It returns an enumeration from the following list:\n * - 0: NETWORK_EMPTY\n * - 1: NETWORK_IDLE\n * - 2: NETWORK_LOADING\n * - 3: NETWORK_NO_SOURCE\n *\n * @method Html5#networkState\n * @return {number}\n *         The value of `networkState` from the media element. This will be a number\n *         from the list in the description.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-networkstate}\n */\n'networkState',\n/**\n * Get the value of `readyState` from the media element. `readyState` indicates\n * the current state of the media element. It returns an enumeration from the\n * following list:\n * - 0: HAVE_NOTHING\n * - 1: HAVE_METADATA\n * - 2: HAVE_CURRENT_DATA\n * - 3: HAVE_FUTURE_DATA\n * - 4: HAVE_ENOUGH_DATA\n *\n * @method Html5#readyState\n * @return {number}\n *         The value of `readyState` from the media element. This will be a number\n *         from the list in the description.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#ready-states}\n */\n'readyState',\n/**\n * Get the value of `videoWidth` from the video element. `videoWidth` indicates\n * the current width of the video in css pixels.\n *\n * @method Html5#videoWidth\n * @return {number}\n *         The value of `videoWidth` from the video element. This will be a number\n *         in css pixels.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-video-videowidth}\n */\n'videoWidth',\n/**\n * Get the value of `videoHeight` from the video element. `videoHeight` indicates\n * the current height of the video in css pixels.\n *\n * @method Html5#videoHeight\n * @return {number}\n *         The value of `videoHeight` from the video element. This will be a number\n *         in css pixels.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-video-videowidth}\n */\n'videoHeight'].forEach(function (prop) {\n  Html5.prototype[prop] = function () {\n    return this.el_[prop];\n  };\n}); // Wrap native properties with a setter in this format:\n// set + toTitleCase(name)\n// The list is as follows:\n// setVolume, setSrc, setPoster, setPreload, setPlaybackRate, setDefaultPlaybackRate\n\n[\n/**\n * Set the value of `volume` on the media element. `volume` indicates the current\n * audio level as a percentage in decimal form. This means that 1 is 100%, 0.5 is 50%, and\n * so on.\n *\n * @method Html5#setVolume\n * @param {number} percentAsDecimal\n *        The volume percent as a decimal. Valid range is from 0-1.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-a-volume}\n */\n'volume',\n/**\n * Set the value of `src` on the media element. `src` indicates the current\n * {@link Tech~SourceObject} for the media.\n *\n * @method Html5#setSrc\n * @param {Tech~SourceObject} src\n *        The source object to set as the current source.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-src}\n */\n'src',\n/**\n * Set the value of `poster` on the media element. `poster` is the url to\n * an image file that can/will be shown when no media data is available.\n *\n * @method Html5#setPoster\n * @param {string} poster\n *        The url to an image that should be used as the `poster` for the media\n *        element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-poster}\n */\n'poster',\n/**\n * Set the value of `preload` on the media element. `preload` indicates\n * what should download before the media is interacted with. It can have the following\n * values:\n * - none: nothing should be downloaded\n * - metadata: poster and the first few frames of the media may be downloaded to get\n *   media dimensions and other metadata\n * - auto: allow the media and metadata for the media to be downloaded before\n *    interaction\n *\n * @method Html5#setPreload\n * @param {string} preload\n *         The value of `preload` to set on the media element. Must be 'none', 'metadata',\n *         or 'auto'.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-preload}\n */\n'preload',\n/**\n * Set the value of `playbackRate` on the media element. `playbackRate` indicates\n * the rate at which the media should play back. Examples:\n *   - if playbackRate is set to 2, media will play twice as fast.\n *   - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5#setPlaybackRate\n * @return {number}\n *         The value of `playbackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n'playbackRate',\n/**\n * Set the value of `defaultPlaybackRate` on the media element. `defaultPlaybackRate` indicates\n * the rate at which the media should play back upon initial startup. Changing this value\n * after a video has started will do nothing. Instead you should used {@link Html5#setPlaybackRate}.\n *\n * Example Values:\n *   - if playbackRate is set to 2, media will play twice as fast.\n *   - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5.prototype.setDefaultPlaybackRate\n * @return {number}\n *         The value of `defaultPlaybackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultplaybackrate}\n */\n'defaultPlaybackRate'].forEach(function (prop) {\n  Html5.prototype['set' + toTitleCase(prop)] = function (v) {\n    this.el_[prop] = v;\n  };\n}); // wrap native functions with a function\n// The list is as follows:\n// pause, load, play\n\n[\n/**\n * A wrapper around the media elements `pause` function. This will call the `HTML5`\n * media elements `pause` function.\n *\n * @method Html5#pause\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-pause}\n */\n'pause',\n/**\n * A wrapper around the media elements `load` function. This will call the `HTML5`s\n * media element `load` function.\n *\n * @method Html5#load\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-load}\n */\n'load',\n/**\n * A wrapper around the media elements `play` function. This will call the `HTML5`s\n * media element `play` function.\n *\n * @method Html5#play\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-play}\n */\n'play'].forEach(function (prop) {\n  Html5.prototype[prop] = function () {\n    return this.el_[prop]();\n  };\n});\nTech.withSourceHandlers(Html5);\n/**\n * Native source handler for Html5, simply passes the source to the media element.\n *\n * @property {Tech~SourceObject} source\n *        The source object\n *\n * @property {Html5} tech\n *        The instance of the HTML5 tech.\n */\n\nHtml5.nativeSourceHandler = {};\n/**\n * Check if the media element can play the given mime type.\n *\n * @param {string} type\n *        The mimetype to check\n *\n * @return {string}\n *         'probably', 'maybe', or '' (empty string)\n */\n\nHtml5.nativeSourceHandler.canPlayType = function (type) {\n  // IE without MediaPlayer throws an error (#519)\n  try {\n    return Html5.TEST_VID.canPlayType(type);\n  } catch (e) {\n    return '';\n  }\n};\n/**\n * Check if the media element can handle a source natively.\n *\n * @param {Tech~SourceObject} source\n *         The source object\n *\n * @param {Object} [options]\n *         Options to be passed to the tech.\n *\n * @return {string}\n *         'probably', 'maybe', or '' (empty string).\n */\n\n\nHtml5.nativeSourceHandler.canHandleSource = function (source, options) {\n  // If a type was provided we should rely on that\n  if (source.type) {\n    return Html5.nativeSourceHandler.canPlayType(source.type); // If no type, fall back to checking 'video/[EXTENSION]'\n  } else if (source.src) {\n    var ext = getFileExtension(source.src);\n    return Html5.nativeSourceHandler.canPlayType(\"video/\" + ext);\n  }\n\n  return '';\n};\n/**\n * Pass the source to the native media element.\n *\n * @param {Tech~SourceObject} source\n *        The source object\n *\n * @param {Html5} tech\n *        The instance of the Html5 tech\n *\n * @param {Object} [options]\n *        The options to pass to the source\n */\n\n\nHtml5.nativeSourceHandler.handleSource = function (source, tech, options) {\n  tech.setSrc(source.src);\n};\n/**\n * A noop for the native dispose function, as cleanup is not needed.\n */\n\n\nHtml5.nativeSourceHandler.dispose = function () {}; // Register the native source handler\n\n\nHtml5.registerSourceHandler(Html5.nativeSourceHandler);\nTech.registerTech('Html5', Html5); // on the player when they happen\n\nvar TECH_EVENTS_RETRIGGER = [\n/**\n * Fired while the user agent is downloading media data.\n *\n * @event Player#progress\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `progress` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechProgress_\n * @fires Player#progress\n * @listens Tech#progress\n */\n'progress',\n/**\n * Fires when the loading of an audio/video is aborted.\n *\n * @event Player#abort\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `abort` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechAbort_\n * @fires Player#abort\n * @listens Tech#abort\n */\n'abort',\n/**\n * Fires when the browser is intentionally not getting media data.\n *\n * @event Player#suspend\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `suspend` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechSuspend_\n * @fires Player#suspend\n * @listens Tech#suspend\n */\n'suspend',\n/**\n * Fires when the current playlist is empty.\n *\n * @event Player#emptied\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `emptied` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechEmptied_\n * @fires Player#emptied\n * @listens Tech#emptied\n */\n'emptied',\n/**\n * Fires when the browser is trying to get media data, but data is not available.\n *\n * @event Player#stalled\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `stalled` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechStalled_\n * @fires Player#stalled\n * @listens Tech#stalled\n */\n'stalled',\n/**\n * Fires when the browser has loaded meta data for the audio/video.\n *\n * @event Player#loadedmetadata\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `stalled` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechLoadedmetadata_\n * @fires Player#loadedmetadata\n * @listens Tech#loadedmetadata\n */\n'loadedmetadata',\n/**\n * Fires when the browser has loaded the current frame of the audio/video.\n *\n * @event Player#loadeddata\n * @type {event}\n */\n\n/**\n * Retrigger the `loadeddata` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechLoaddeddata_\n * @fires Player#loadeddata\n * @listens Tech#loadeddata\n */\n'loadeddata',\n/**\n * Fires when the current playback position has changed.\n *\n * @event Player#timeupdate\n * @type {event}\n */\n\n/**\n * Retrigger the `timeupdate` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechTimeUpdate_\n * @fires Player#timeupdate\n * @listens Tech#timeupdate\n */\n'timeupdate',\n/**\n * Fires when the video's intrinsic dimensions change\n *\n * @event Player#resize\n * @type {event}\n */\n\n/**\n * Retrigger the `resize` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechResize_\n * @fires Player#resize\n * @listens Tech#resize\n */\n'resize',\n/**\n * Fires when the volume has been changed\n *\n * @event Player#volumechange\n * @type {event}\n */\n\n/**\n * Retrigger the `volumechange` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechVolumechange_\n * @fires Player#volumechange\n * @listens Tech#volumechange\n */\n'volumechange',\n/**\n * Fires when the text track has been changed\n *\n * @event Player#texttrackchange\n * @type {event}\n */\n\n/**\n * Retrigger the `texttrackchange` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechTexttrackchange_\n * @fires Player#texttrackchange\n * @listens Tech#texttrackchange\n */\n'texttrackchange']; // events to queue when playback rate is zero\n// this is a hash for the sole purpose of mapping non-camel-cased event names\n// to camel-cased function names\n\nvar TECH_EVENTS_QUEUE = {\n  canplay: 'CanPlay',\n  canplaythrough: 'CanPlayThrough',\n  playing: 'Playing',\n  seeked: 'Seeked'\n};\nvar BREAKPOINT_ORDER = ['tiny', 'xsmall', 'small', 'medium', 'large', 'xlarge', 'huge'];\nvar BREAKPOINT_CLASSES = {}; // grep: vjs-layout-tiny\n// grep: vjs-layout-x-small\n// grep: vjs-layout-small\n// grep: vjs-layout-medium\n// grep: vjs-layout-large\n// grep: vjs-layout-x-large\n// grep: vjs-layout-huge\n\nBREAKPOINT_ORDER.forEach(function (k) {\n  var v = k.charAt(0) === 'x' ? \"x-\" + k.substring(1) : k;\n  BREAKPOINT_CLASSES[k] = \"vjs-layout-\" + v;\n});\nvar DEFAULT_BREAKPOINTS = {\n  tiny: 210,\n  xsmall: 320,\n  small: 425,\n  medium: 768,\n  large: 1440,\n  xlarge: 2560,\n  huge: Infinity\n};\n/**\n * An instance of the `Player` class is created when any of the Video.js setup methods\n * are used to initialize a video.\n *\n * After an instance has been created it can be accessed globally in two ways:\n * 1. By calling `videojs('example_video_1');`\n * 2. By using it directly via  `videojs.players.example_video_1;`\n *\n * @extends Component\n */\n\nvar Player =\n/*#__PURE__*/\nfunction (_Component) {\n  _inheritsLoose(Player, _Component);\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Element} tag\n   *        The original video DOM element used for configuring options.\n   *\n   * @param {Object} [options]\n   *        Object of option names and values.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        Ready callback function.\n   */\n\n\n  function Player(tag, options, ready) {\n    var _this; // Make sure tag ID exists\n\n\n    tag.id = tag.id || options.id || \"vjs_video_\" + newGUID(); // Set Options\n    // The options argument overrides options set in the video tag\n    // which overrides globally set options.\n    // This latter part coincides with the load order\n    // (tag must exist before Player)\n\n    options = assign(Player.getTagSettings(tag), options); // Delay the initialization of children because we need to set up\n    // player properties first, and can't use `this` before `super()`\n\n    options.initChildren = false; // Same with creating the element\n\n    options.createEl = false; // don't auto mixin the evented mixin\n\n    options.evented = false; // we don't want the player to report touch activity on itself\n    // see enableTouchActivity in Component\n\n    options.reportTouchActivity = false; // If language is not set, get the closest lang attribute\n\n    if (!options.language) {\n      if (typeof tag.closest === 'function') {\n        var closest = tag.closest('[lang]');\n\n        if (closest && closest.getAttribute) {\n          options.language = closest.getAttribute('lang');\n        }\n      } else {\n        var element = tag;\n\n        while (element && element.nodeType === 1) {\n          if (getAttributes(element).hasOwnProperty('lang')) {\n            options.language = element.getAttribute('lang');\n            break;\n          }\n\n          element = element.parentNode;\n        }\n      }\n    } // Run base component initializing with new options\n\n\n    _this = _Component.call(this, null, options, ready) || this; // Create bound methods for document listeners.\n\n    _this.boundDocumentFullscreenChange_ = bind(_assertThisInitialized(_this), _this.documentFullscreenChange_);\n    _this.boundFullWindowOnEscKey_ = bind(_assertThisInitialized(_this), _this.fullWindowOnEscKey); // create logger\n\n    _this.log = createLogger$1(_this.id_); // Hold our own reference to fullscreen api so it can be mocked in tests\n\n    _this.fsApi_ = FullscreenApi; // Tracks when a tech changes the poster\n\n    _this.isPosterFromTech_ = false; // Holds callback info that gets queued when playback rate is zero\n    // and a seek is happening\n\n    _this.queuedCallbacks_ = []; // Turn off API access because we're loading a new tech that might load asynchronously\n\n    _this.isReady_ = false; // Init state hasStarted_\n\n    _this.hasStarted_ = false; // Init state userActive_\n\n    _this.userActive_ = false; // if the global option object was accidentally blown away by\n    // someone, bail early with an informative error\n\n    if (!_this.options_ || !_this.options_.techOrder || !_this.options_.techOrder.length) {\n      throw new Error('No techOrder specified. Did you overwrite ' + 'videojs.options instead of just changing the ' + 'properties you want to override?');\n    } // Store the original tag used to set options\n\n\n    _this.tag = tag; // Store the tag attributes used to restore html5 element\n\n    _this.tagAttributes = tag && getAttributes(tag); // Update current language\n\n    _this.language(_this.options_.language); // Update Supported Languages\n\n\n    if (options.languages) {\n      // Normalise player option languages to lowercase\n      var languagesToLower = {};\n      Object.getOwnPropertyNames(options.languages).forEach(function (name) {\n        languagesToLower[name.toLowerCase()] = options.languages[name];\n      });\n      _this.languages_ = languagesToLower;\n    } else {\n      _this.languages_ = Player.prototype.options_.languages;\n    }\n\n    _this.resetCache_(); // Set poster\n\n\n    _this.poster_ = options.poster || ''; // Set controls\n\n    _this.controls_ = !!options.controls; // Original tag settings stored in options\n    // now remove immediately so native controls don't flash.\n    // May be turned back on by HTML5 tech if nativeControlsForTouch is true\n\n    tag.controls = false;\n    tag.removeAttribute('controls');\n    _this.changingSrc_ = false;\n    _this.playCallbacks_ = [];\n    _this.playTerminatedQueue_ = []; // the attribute overrides the option\n\n    if (tag.hasAttribute('autoplay')) {\n      _this.autoplay(true);\n    } else {\n      // otherwise use the setter to validate and\n      // set the correct value.\n      _this.autoplay(_this.options_.autoplay);\n    } // check plugins\n\n\n    if (options.plugins) {\n      Object.keys(options.plugins).forEach(function (name) {\n        if (typeof _this[name] !== 'function') {\n          throw new Error(\"plugin \\\"\" + name + \"\\\" does not exist\");\n        }\n      });\n    }\n    /*\n     * Store the internal state of scrubbing\n     *\n     * @private\n     * @return {Boolean} True if the user is scrubbing\n     */\n\n\n    _this.scrubbing_ = false;\n    _this.el_ = _this.createEl(); // Make this an evented object and use `el_` as its event bus.\n\n    evented(_assertThisInitialized(_this), {\n      eventBusKey: 'el_'\n    });\n\n    if (_this.fluid_) {\n      _this.on('playerreset', _this.updateStyleEl_);\n    } // We also want to pass the original player options to each component and plugin\n    // as well so they don't need to reach back into the player for options later.\n    // We also need to do another copy of this.options_ so we don't end up with\n    // an infinite loop.\n\n\n    var playerOptionsCopy = mergeOptions(_this.options_); // Load plugins\n\n    if (options.plugins) {\n      Object.keys(options.plugins).forEach(function (name) {\n        _this[name](options.plugins[name]);\n      });\n    }\n\n    _this.options_.playerOptions = playerOptionsCopy;\n    _this.middleware_ = [];\n\n    _this.initChildren(); // Set isAudio based on whether or not an audio tag was used\n\n\n    _this.isAudio(tag.nodeName.toLowerCase() === 'audio'); // Update controls className. Can't do this when the controls are initially\n    // set because the element doesn't exist yet.\n\n\n    if (_this.controls()) {\n      _this.addClass('vjs-controls-enabled');\n    } else {\n      _this.addClass('vjs-controls-disabled');\n    } // Set ARIA label and region role depending on player type\n\n\n    _this.el_.setAttribute('role', 'region');\n\n    if (_this.isAudio()) {\n      _this.el_.setAttribute('aria-label', _this.localize('Audio Player'));\n    } else {\n      _this.el_.setAttribute('aria-label', _this.localize('Video Player'));\n    }\n\n    if (_this.isAudio()) {\n      _this.addClass('vjs-audio');\n    }\n\n    if (_this.flexNotSupported_()) {\n      _this.addClass('vjs-no-flex');\n    } // TODO: Make this smarter. Toggle user state between touching/mousing\n    // using events, since devices can have both touch and mouse events.\n    // TODO: Make this check be performed again when the window switches between monitors\n    // (See https://github.com/videojs/video.js/issues/5683)\n\n\n    if (TOUCH_ENABLED) {\n      _this.addClass('vjs-touch-enabled');\n    } // iOS Safari has broken hover handling\n\n\n    if (!IS_IOS) {\n      _this.addClass('vjs-workinghover');\n    } // Make player easily findable by ID\n\n\n    Player.players[_this.id_] = _assertThisInitialized(_this); // Add a major version class to aid css in plugins\n\n    var majorVersion = version.split('.')[0];\n\n    _this.addClass(\"vjs-v\" + majorVersion); // When the player is first initialized, trigger activity so components\n    // like the control bar show themselves if needed\n\n\n    _this.userActive(true);\n\n    _this.reportUserActivity();\n\n    _this.one('play', _this.listenForUserActivity_);\n\n    _this.on('stageclick', _this.handleStageClick_);\n\n    _this.on('keydown', _this.handleKeyDown);\n\n    _this.breakpoints(_this.options_.breakpoints);\n\n    _this.responsive(_this.options_.responsive);\n\n    return _this;\n  }\n  /**\n   * Destroys the video player and does any necessary cleanup.\n   *\n   * This is especially helpful if you are dynamically adding and removing videos\n   * to/from the DOM.\n   *\n   * @fires Player#dispose\n   */\n\n\n  var _proto = Player.prototype;\n\n  _proto.dispose = function dispose() {\n    var _this2 = this;\n    /**\n     * Called when the player is being disposed of.\n     *\n     * @event Player#dispose\n     * @type {EventTarget~Event}\n     */\n\n\n    this.trigger('dispose'); // prevent dispose from being called twice\n\n    this.off('dispose'); // Make sure all player-specific document listeners are unbound. This is\n\n    off(document, this.fsApi_.fullscreenchange, this.boundDocumentFullscreenChange_);\n    off(document, 'keydown', this.boundFullWindowOnEscKey_);\n\n    if (this.styleEl_ && this.styleEl_.parentNode) {\n      this.styleEl_.parentNode.removeChild(this.styleEl_);\n      this.styleEl_ = null;\n    } // Kill reference to this player\n\n\n    Player.players[this.id_] = null;\n\n    if (this.tag && this.tag.player) {\n      this.tag.player = null;\n    }\n\n    if (this.el_ && this.el_.player) {\n      this.el_.player = null;\n    }\n\n    if (this.tech_) {\n      this.tech_.dispose();\n      this.isPosterFromTech_ = false;\n      this.poster_ = '';\n    }\n\n    if (this.playerElIngest_) {\n      this.playerElIngest_ = null;\n    }\n\n    if (this.tag) {\n      this.tag = null;\n    }\n\n    clearCacheForPlayer(this); // remove all event handlers for track lists\n    // all tracks and track listeners are removed on\n    // tech dispose\n\n    ALL.names.forEach(function (name) {\n      var props = ALL[name];\n\n      var list = _this2[props.getterName](); // if it is not a native list\n      // we have to manually remove event listeners\n\n\n      if (list && list.off) {\n        list.off();\n      }\n    }); // the actual .el_ is removed here\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Create the `Player`'s DOM element.\n   *\n   * @return {Element}\n   *         The DOM element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    var tag = this.tag;\n    var el;\n    var playerElIngest = this.playerElIngest_ = tag.parentNode && tag.parentNode.hasAttribute && tag.parentNode.hasAttribute('data-vjs-player');\n    var divEmbed = this.tag.tagName.toLowerCase() === 'video-js';\n\n    if (playerElIngest) {\n      el = this.el_ = tag.parentNode;\n    } else if (!divEmbed) {\n      el = this.el_ = _Component.prototype.createEl.call(this, 'div');\n    } // Copy over all the attributes from the tag, including ID and class\n    // ID will now reference player box, not the video tag\n\n\n    var attrs = getAttributes(tag);\n\n    if (divEmbed) {\n      el = this.el_ = tag;\n      tag = this.tag = document.createElement('video');\n\n      while (el.children.length) {\n        tag.appendChild(el.firstChild);\n      }\n\n      if (!hasClass(el, 'video-js')) {\n        addClass(el, 'video-js');\n      }\n\n      el.appendChild(tag);\n      playerElIngest = this.playerElIngest_ = el; // move properties over from our custom `video-js` element\n      // to our new `video` element. This will move things like\n      // `src` or `controls` that were set via js before the player\n      // was initialized.\n\n      Object.keys(el).forEach(function (k) {\n        tag[k] = el[k];\n      });\n    } // set tabindex to -1 to remove the video element from the focus order\n\n\n    tag.setAttribute('tabindex', '-1');\n    attrs.tabindex = '-1'; // Workaround for #4583 (JAWS+IE doesn't announce BPB or play button), and\n    // for the same issue with Chrome (on Windows) with JAWS.\n    // See https://github.com/FreedomScientific/VFO-standards-support/issues/78\n    // Note that we can't detect if JAWS is being used, but this ARIA attribute\n    //  doesn't change behavior of IE11 or Chrome if JAWS is not being used\n\n    if (IE_VERSION || IS_CHROME && IS_WINDOWS) {\n      tag.setAttribute('role', 'application');\n      attrs.role = 'application';\n    } // Remove width/height attrs from tag so CSS can make it 100% width/height\n\n\n    tag.removeAttribute('width');\n    tag.removeAttribute('height');\n\n    if ('width' in attrs) {\n      delete attrs.width;\n    }\n\n    if ('height' in attrs) {\n      delete attrs.height;\n    }\n\n    Object.getOwnPropertyNames(attrs).forEach(function (attr) {\n      // don't copy over the class attribute to the player element when we're in a div embed\n      // the class is already set up properly in the divEmbed case\n      // and we want to make sure that the `video-js` class doesn't get lost\n      if (!(divEmbed && attr === 'class')) {\n        el.setAttribute(attr, attrs[attr]);\n      }\n\n      if (divEmbed) {\n        tag.setAttribute(attr, attrs[attr]);\n      }\n    }); // Update tag id/class for use as HTML5 playback tech\n    // Might think we should do this after embedding in container so .vjs-tech class\n    // doesn't flash 100% width/height, but class only applies with .video-js parent\n\n    tag.playerId = tag.id;\n    tag.id += '_html5_api';\n    tag.className = 'vjs-tech'; // Make player findable on elements\n\n    tag.player = el.player = this; // Default state of video is paused\n\n    this.addClass('vjs-paused'); // Add a style element in the player that we'll use to set the width/height\n    // of the player in a way that's still overrideable by CSS, just like the\n    // video element\n\n    if (window$1.VIDEOJS_NO_DYNAMIC_STYLE !== true) {\n      this.styleEl_ = createStyleElement('vjs-styles-dimensions');\n      var defaultsStyleEl = $('.vjs-styles-defaults');\n      var head = $('head');\n      head.insertBefore(this.styleEl_, defaultsStyleEl ? defaultsStyleEl.nextSibling : head.firstChild);\n    }\n\n    this.fill_ = false;\n    this.fluid_ = false; // Pass in the width/height/aspectRatio options which will update the style el\n\n    this.width(this.options_.width);\n    this.height(this.options_.height);\n    this.fill(this.options_.fill);\n    this.fluid(this.options_.fluid);\n    this.aspectRatio(this.options_.aspectRatio); // Hide any links within the video/audio tag,\n    // because IE doesn't hide them completely from screen readers.\n\n    var links = tag.getElementsByTagName('a');\n\n    for (var i = 0; i < links.length; i++) {\n      var linkEl = links.item(i);\n      addClass(linkEl, 'vjs-hidden');\n      linkEl.setAttribute('hidden', 'hidden');\n    } // insertElFirst seems to cause the networkState to flicker from 3 to 2, so\n    // keep track of the original for later so we can know if the source originally failed\n\n\n    tag.initNetworkState_ = tag.networkState; // Wrap video tag in div (el/box) container\n\n    if (tag.parentNode && !playerElIngest) {\n      tag.parentNode.insertBefore(el, tag);\n    } // insert the tag as the first child of the player element\n    // then manually add it to the children array so that this.addChild\n    // will work properly for other components\n    //\n    // Breaks iPhone, fixed in HTML5 setup.\n\n\n    prependTo(tag, el);\n    this.children_.unshift(tag); // Set lang attr on player to ensure CSS :lang() in consistent with player\n    // if it's been set to something different to the doc\n\n    this.el_.setAttribute('lang', this.language_);\n    this.el_ = el;\n    return el;\n  }\n  /**\n   * A getter/setter for the `Player`'s width. Returns the player's configured value.\n   * To get the current width use `currentWidth()`.\n   *\n   * @param {number} [value]\n   *        The value to set the `Player`'s width to.\n   *\n   * @return {number}\n   *         The current width of the `Player` when getting.\n   */\n  ;\n\n  _proto.width = function width(value) {\n    return this.dimension('width', value);\n  }\n  /**\n   * A getter/setter for the `Player`'s height. Returns the player's configured value.\n   * To get the current height use `currentheight()`.\n   *\n   * @param {number} [value]\n   *        The value to set the `Player`'s heigth to.\n   *\n   * @return {number}\n   *         The current height of the `Player` when getting.\n   */\n  ;\n\n  _proto.height = function height(value) {\n    return this.dimension('height', value);\n  }\n  /**\n   * A getter/setter for the `Player`'s width & height.\n   *\n   * @param {string} dimension\n   *        This string can be:\n   *        - 'width'\n   *        - 'height'\n   *\n   * @param {number} [value]\n   *        Value for dimension specified in the first argument.\n   *\n   * @return {number}\n   *         The dimension arguments value when getting (width/height).\n   */\n  ;\n\n  _proto.dimension = function dimension(_dimension, value) {\n    var privDimension = _dimension + '_';\n\n    if (value === undefined) {\n      return this[privDimension] || 0;\n    }\n\n    if (value === '') {\n      // If an empty string is given, reset the dimension to be automatic\n      this[privDimension] = undefined;\n      this.updateStyleEl_();\n      return;\n    }\n\n    var parsedVal = parseFloat(value);\n\n    if (isNaN(parsedVal)) {\n      log.error(\"Improper value \\\"\" + value + \"\\\" supplied for for \" + _dimension);\n      return;\n    }\n\n    this[privDimension] = parsedVal;\n    this.updateStyleEl_();\n  }\n  /**\n   * A getter/setter/toggler for the vjs-fluid `className` on the `Player`.\n   *\n   * Turning this on will turn off fill mode.\n   *\n   * @param {boolean} [bool]\n   *        - A value of true adds the class.\n   *        - A value of false removes the class.\n   *        - No value will be a getter.\n   *\n   * @return {boolean|undefined}\n   *         - The value of fluid when getting.\n   *         - `undefined` when setting.\n   */\n  ;\n\n  _proto.fluid = function fluid(bool) {\n    if (bool === undefined) {\n      return !!this.fluid_;\n    }\n\n    this.fluid_ = !!bool;\n\n    if (isEvented(this)) {\n      this.off('playerreset', this.updateStyleEl_);\n    }\n\n    if (bool) {\n      this.addClass('vjs-fluid');\n      this.fill(false);\n      addEventedCallback(function () {\n        this.on('playerreset', this.updateStyleEl_);\n      });\n    } else {\n      this.removeClass('vjs-fluid');\n    }\n\n    this.updateStyleEl_();\n  }\n  /**\n   * A getter/setter/toggler for the vjs-fill `className` on the `Player`.\n   *\n   * Turning this on will turn off fluid mode.\n   *\n   * @param {boolean} [bool]\n   *        - A value of true adds the class.\n   *        - A value of false removes the class.\n   *        - No value will be a getter.\n   *\n   * @return {boolean|undefined}\n   *         - The value of fluid when getting.\n   *         - `undefined` when setting.\n   */\n  ;\n\n  _proto.fill = function fill(bool) {\n    if (bool === undefined) {\n      return !!this.fill_;\n    }\n\n    this.fill_ = !!bool;\n\n    if (bool) {\n      this.addClass('vjs-fill');\n      this.fluid(false);\n    } else {\n      this.removeClass('vjs-fill');\n    }\n  }\n  /**\n   * Get/Set the aspect ratio\n   *\n   * @param {string} [ratio]\n   *        Aspect ratio for player\n   *\n   * @return {string|undefined}\n   *         returns the current aspect ratio when getting\n   */\n\n  /**\n   * A getter/setter for the `Player`'s aspect ratio.\n   *\n   * @param {string} [ratio]\n   *        The value to set the `Player's aspect ratio to.\n   *\n   * @return {string|undefined}\n   *         - The current aspect ratio of the `Player` when getting.\n   *         - undefined when setting\n   */\n  ;\n\n  _proto.aspectRatio = function aspectRatio(ratio) {\n    if (ratio === undefined) {\n      return this.aspectRatio_;\n    } // Check for width:height format\n\n\n    if (!/^\\d+\\:\\d+$/.test(ratio)) {\n      throw new Error('Improper value supplied for aspect ratio. The format should be width:height, for example 16:9.');\n    }\n\n    this.aspectRatio_ = ratio; // We're assuming if you set an aspect ratio you want fluid mode,\n    // because in fixed mode you could calculate width and height yourself.\n\n    this.fluid(true);\n    this.updateStyleEl_();\n  }\n  /**\n   * Update styles of the `Player` element (height, width and aspect ratio).\n   *\n   * @private\n   * @listens Tech#loadedmetadata\n   */\n  ;\n\n  _proto.updateStyleEl_ = function updateStyleEl_() {\n    if (window$1.VIDEOJS_NO_DYNAMIC_STYLE === true) {\n      var _width = typeof this.width_ === 'number' ? this.width_ : this.options_.width;\n\n      var _height = typeof this.height_ === 'number' ? this.height_ : this.options_.height;\n\n      var techEl = this.tech_ && this.tech_.el();\n\n      if (techEl) {\n        if (_width >= 0) {\n          techEl.width = _width;\n        }\n\n        if (_height >= 0) {\n          techEl.height = _height;\n        }\n      }\n\n      return;\n    }\n\n    var width;\n    var height;\n    var aspectRatio;\n    var idClass; // The aspect ratio is either used directly or to calculate width and height.\n\n    if (this.aspectRatio_ !== undefined && this.aspectRatio_ !== 'auto') {\n      // Use any aspectRatio that's been specifically set\n      aspectRatio = this.aspectRatio_;\n    } else if (this.videoWidth() > 0) {\n      // Otherwise try to get the aspect ratio from the video metadata\n      aspectRatio = this.videoWidth() + ':' + this.videoHeight();\n    } else {\n      // Or use a default. The video element's is 2:1, but 16:9 is more common.\n      aspectRatio = '16:9';\n    } // Get the ratio as a decimal we can use to calculate dimensions\n\n\n    var ratioParts = aspectRatio.split(':');\n    var ratioMultiplier = ratioParts[1] / ratioParts[0];\n\n    if (this.width_ !== undefined) {\n      // Use any width that's been specifically set\n      width = this.width_;\n    } else if (this.height_ !== undefined) {\n      // Or calulate the width from the aspect ratio if a height has been set\n      width = this.height_ / ratioMultiplier;\n    } else {\n      // Or use the video's metadata, or use the video el's default of 300\n      width = this.videoWidth() || 300;\n    }\n\n    if (this.height_ !== undefined) {\n      // Use any height that's been specifically set\n      height = this.height_;\n    } else {\n      // Otherwise calculate the height from the ratio and the width\n      height = width * ratioMultiplier;\n    } // Ensure the CSS class is valid by starting with an alpha character\n\n\n    if (/^[^a-zA-Z]/.test(this.id())) {\n      idClass = 'dimensions-' + this.id();\n    } else {\n      idClass = this.id() + '-dimensions';\n    } // Ensure the right class is still on the player for the style element\n\n\n    this.addClass(idClass);\n    setTextContent(this.styleEl_, \"\\n      .\" + idClass + \" {\\n        width: \" + width + \"px;\\n        height: \" + height + \"px;\\n      }\\n\\n      .\" + idClass + \".vjs-fluid {\\n        padding-top: \" + ratioMultiplier * 100 + \"%;\\n      }\\n    \");\n  }\n  /**\n   * Load/Create an instance of playback {@link Tech} including element\n   * and API methods. Then append the `Tech` element in `Player` as a child.\n   *\n   * @param {string} techName\n   *        name of the playback technology\n   *\n   * @param {string} source\n   *        video source\n   *\n   * @private\n   */\n  ;\n\n  _proto.loadTech_ = function loadTech_(techName, source) {\n    var _this3 = this; // Pause and remove current playback technology\n\n\n    if (this.tech_) {\n      this.unloadTech_();\n    }\n\n    var titleTechName = toTitleCase(techName);\n    var camelTechName = techName.charAt(0).toLowerCase() + techName.slice(1); // get rid of the HTML5 video tag as soon as we are using another tech\n\n    if (titleTechName !== 'Html5' && this.tag) {\n      Tech.getTech('Html5').disposeMediaElement(this.tag);\n      this.tag.player = null;\n      this.tag = null;\n    }\n\n    this.techName_ = titleTechName; // Turn off API access because we're loading a new tech that might load asynchronously\n\n    this.isReady_ = false; // if autoplay is a string we pass false to the tech\n    // because the player is going to handle autoplay on `loadstart`\n\n    var autoplay = typeof this.autoplay() === 'string' ? false : this.autoplay(); // Grab tech-specific options from player options and add source and parent element to use.\n\n    var techOptions = {\n      source: source,\n      autoplay: autoplay,\n      'nativeControlsForTouch': this.options_.nativeControlsForTouch,\n      'playerId': this.id(),\n      'techId': this.id() + \"_\" + camelTechName + \"_api\",\n      'playsinline': this.options_.playsinline,\n      'preload': this.options_.preload,\n      'loop': this.options_.loop,\n      'muted': this.options_.muted,\n      'poster': this.poster(),\n      'language': this.language(),\n      'playerElIngest': this.playerElIngest_ || false,\n      'vtt.js': this.options_['vtt.js'],\n      'canOverridePoster': !!this.options_.techCanOverridePoster,\n      'enableSourceset': this.options_.enableSourceset,\n      'Promise': this.options_.Promise\n    };\n    ALL.names.forEach(function (name) {\n      var props = ALL[name];\n      techOptions[props.getterName] = _this3[props.privateName];\n    });\n    assign(techOptions, this.options_[titleTechName]);\n    assign(techOptions, this.options_[camelTechName]);\n    assign(techOptions, this.options_[techName.toLowerCase()]);\n\n    if (this.tag) {\n      techOptions.tag = this.tag;\n    }\n\n    if (source && source.src === this.cache_.src && this.cache_.currentTime > 0) {\n      techOptions.startTime = this.cache_.currentTime;\n    } // Initialize tech instance\n\n\n    var TechClass = Tech.getTech(techName);\n\n    if (!TechClass) {\n      throw new Error(\"No Tech named '\" + titleTechName + \"' exists! '\" + titleTechName + \"' should be registered using videojs.registerTech()'\");\n    }\n\n    this.tech_ = new TechClass(techOptions); // player.triggerReady is always async, so don't need this to be async\n\n    this.tech_.ready(bind(this, this.handleTechReady_), true);\n    textTrackConverter.jsonToTextTracks(this.textTracksJson_ || [], this.tech_); // Listen to all HTML5-defined events and trigger them on the player\n\n    TECH_EVENTS_RETRIGGER.forEach(function (event) {\n      _this3.on(_this3.tech_, event, _this3[\"handleTech\" + toTitleCase(event) + \"_\"]);\n    });\n    Object.keys(TECH_EVENTS_QUEUE).forEach(function (event) {\n      _this3.on(_this3.tech_, event, function (eventObj) {\n        if (_this3.tech_.playbackRate() === 0 && _this3.tech_.seeking()) {\n          _this3.queuedCallbacks_.push({\n            callback: _this3[\"handleTech\" + TECH_EVENTS_QUEUE[event] + \"_\"].bind(_this3),\n            event: eventObj\n          });\n\n          return;\n        }\n\n        _this3[\"handleTech\" + TECH_EVENTS_QUEUE[event] + \"_\"](eventObj);\n      });\n    });\n    this.on(this.tech_, 'loadstart', this.handleTechLoadStart_);\n    this.on(this.tech_, 'sourceset', this.handleTechSourceset_);\n    this.on(this.tech_, 'waiting', this.handleTechWaiting_);\n    this.on(this.tech_, 'ended', this.handleTechEnded_);\n    this.on(this.tech_, 'seeking', this.handleTechSeeking_);\n    this.on(this.tech_, 'play', this.handleTechPlay_);\n    this.on(this.tech_, 'firstplay', this.handleTechFirstPlay_);\n    this.on(this.tech_, 'pause', this.handleTechPause_);\n    this.on(this.tech_, 'durationchange', this.handleTechDurationChange_);\n    this.on(this.tech_, 'fullscreenchange', this.handleTechFullscreenChange_);\n    this.on(this.tech_, 'enterpictureinpicture', this.handleTechEnterPictureInPicture_);\n    this.on(this.tech_, 'leavepictureinpicture', this.handleTechLeavePictureInPicture_);\n    this.on(this.tech_, 'error', this.handleTechError_);\n    this.on(this.tech_, 'loadedmetadata', this.updateStyleEl_);\n    this.on(this.tech_, 'posterchange', this.handleTechPosterChange_);\n    this.on(this.tech_, 'textdata', this.handleTechTextData_);\n    this.on(this.tech_, 'ratechange', this.handleTechRateChange_);\n    this.usingNativeControls(this.techGet_('controls'));\n\n    if (this.controls() && !this.usingNativeControls()) {\n      this.addTechControlsListeners_();\n    } // Add the tech element in the DOM if it was not already there\n    // Make sure to not insert the original video element if using Html5\n\n\n    if (this.tech_.el().parentNode !== this.el() && (titleTechName !== 'Html5' || !this.tag)) {\n      prependTo(this.tech_.el(), this.el());\n    } // Get rid of the original video tag reference after the first tech is loaded\n\n\n    if (this.tag) {\n      this.tag.player = null;\n      this.tag = null;\n    }\n  }\n  /**\n   * Unload and dispose of the current playback {@link Tech}.\n   *\n   * @private\n   */\n  ;\n\n  _proto.unloadTech_ = function unloadTech_() {\n    var _this4 = this; // Save the current text tracks so that we can reuse the same text tracks with the next tech\n\n\n    ALL.names.forEach(function (name) {\n      var props = ALL[name];\n      _this4[props.privateName] = _this4[props.getterName]();\n    });\n    this.textTracksJson_ = textTrackConverter.textTracksToJson(this.tech_);\n    this.isReady_ = false;\n    this.tech_.dispose();\n    this.tech_ = false;\n\n    if (this.isPosterFromTech_) {\n      this.poster_ = '';\n      this.trigger('posterchange');\n    }\n\n    this.isPosterFromTech_ = false;\n  }\n  /**\n   * Return a reference to the current {@link Tech}.\n   * It will print a warning by default about the danger of using the tech directly\n   * but any argument that is passed in will silence the warning.\n   *\n   * @param {*} [safety]\n   *        Anything passed in to silence the warning\n   *\n   * @return {Tech}\n   *         The Tech\n   */\n  ;\n\n  _proto.tech = function tech(safety) {\n    if (safety === undefined) {\n      log.warn('Using the tech directly can be dangerous. I hope you know what you\\'re doing.\\n' + 'See https://github.com/videojs/video.js/issues/2617 for more info.\\n');\n    }\n\n    return this.tech_;\n  }\n  /**\n   * Set up click and touch listeners for the playback element\n   *\n   * - On desktops: a click on the video itself will toggle playback\n   * - On mobile devices: a click on the video toggles controls\n   *   which is done by toggling the user state between active and\n   *   inactive\n   * - A tap can signal that a user has become active or has become inactive\n   *   e.g. a quick tap on an iPhone movie should reveal the controls. Another\n   *   quick tap should hide them again (signaling the user is in an inactive\n   *   viewing state)\n   * - In addition to this, we still want the user to be considered inactive after\n   *   a few seconds of inactivity.\n   *\n   * > Note: the only part of iOS interaction we can't mimic with this setup\n   * is a touch and hold on the video element counting as activity in order to\n   * keep the controls showing, but that shouldn't be an issue. A touch and hold\n   * on any controls will still keep the user active\n   *\n   * @private\n   */\n  ;\n\n  _proto.addTechControlsListeners_ = function addTechControlsListeners_() {\n    // Make sure to remove all the previous listeners in case we are called multiple times.\n    this.removeTechControlsListeners_(); // Some browsers (Chrome & IE) don't trigger a click on a flash swf, but do\n    // trigger mousedown/up.\n    // http://stackoverflow.com/questions/1444562/javascript-onclick-event-over-flash-object\n    // Any touch events are set to block the mousedown event from happening\n\n    this.on(this.tech_, 'mouseup', this.handleTechClick_);\n    this.on(this.tech_, 'dblclick', this.handleTechDoubleClick_); // If the controls were hidden we don't want that to change without a tap event\n    // so we'll check if the controls were already showing before reporting user\n    // activity\n\n    this.on(this.tech_, 'touchstart', this.handleTechTouchStart_);\n    this.on(this.tech_, 'touchmove', this.handleTechTouchMove_);\n    this.on(this.tech_, 'touchend', this.handleTechTouchEnd_); // The tap listener needs to come after the touchend listener because the tap\n    // listener cancels out any reportedUserActivity when setting userActive(false)\n\n    this.on(this.tech_, 'tap', this.handleTechTap_);\n  }\n  /**\n   * Remove the listeners used for click and tap controls. This is needed for\n   * toggling to controls disabled, where a tap/touch should do nothing.\n   *\n   * @private\n   */\n  ;\n\n  _proto.removeTechControlsListeners_ = function removeTechControlsListeners_() {\n    // We don't want to just use `this.off()` because there might be other needed\n    // listeners added by techs that extend this.\n    this.off(this.tech_, 'tap', this.handleTechTap_);\n    this.off(this.tech_, 'touchstart', this.handleTechTouchStart_);\n    this.off(this.tech_, 'touchmove', this.handleTechTouchMove_);\n    this.off(this.tech_, 'touchend', this.handleTechTouchEnd_);\n    this.off(this.tech_, 'mouseup', this.handleTechClick_);\n    this.off(this.tech_, 'dblclick', this.handleTechDoubleClick_);\n  }\n  /**\n   * Player waits for the tech to be ready\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleTechReady_ = function handleTechReady_() {\n    this.triggerReady(); // Keep the same volume as before\n\n    if (this.cache_.volume) {\n      this.techCall_('setVolume', this.cache_.volume);\n    } // Look if the tech found a higher resolution poster while loading\n\n\n    this.handleTechPosterChange_(); // Update the duration if available\n\n    this.handleTechDurationChange_();\n  }\n  /**\n   * Retrigger the `loadstart` event that was triggered by the {@link Tech}. This\n   * function will also trigger {@link Player#firstplay} if it is the first loadstart\n   * for a video.\n   *\n   * @fires Player#loadstart\n   * @fires Player#firstplay\n   * @listens Tech#loadstart\n   * @private\n   */\n  ;\n\n  _proto.handleTechLoadStart_ = function handleTechLoadStart_() {\n    // TODO: Update to use `emptied` event instead. See #1277.\n    this.removeClass('vjs-ended');\n    this.removeClass('vjs-seeking'); // reset the error state\n\n    this.error(null); // Update the duration\n\n    this.handleTechDurationChange_(); // If it's already playing we want to trigger a firstplay event now.\n    // The firstplay event relies on both the play and loadstart events\n    // which can happen in any order for a new source\n\n    if (!this.paused()) {\n      /**\n       * Fired when the user agent begins looking for media data\n       *\n       * @event Player#loadstart\n       * @type {EventTarget~Event}\n       */\n      this.trigger('loadstart');\n      this.trigger('firstplay');\n    } else {\n      // reset the hasStarted state\n      this.hasStarted(false);\n      this.trigger('loadstart');\n    } // autoplay happens after loadstart for the browser,\n    // so we mimic that behavior\n\n\n    this.manualAutoplay_(this.autoplay());\n  }\n  /**\n   * Handle autoplay string values, rather than the typical boolean\n   * values that should be handled by the tech. Note that this is not\n   * part of any specification. Valid values and what they do can be\n   * found on the autoplay getter at Player#autoplay()\n   */\n  ;\n\n  _proto.manualAutoplay_ = function manualAutoplay_(type) {\n    var _this5 = this;\n\n    if (!this.tech_ || typeof type !== 'string') {\n      return;\n    }\n\n    var muted = function muted() {\n      var previouslyMuted = _this5.muted();\n\n      _this5.muted(true);\n\n      var restoreMuted = function restoreMuted() {\n        _this5.muted(previouslyMuted);\n      }; // restore muted on play terminatation\n\n\n      _this5.playTerminatedQueue_.push(restoreMuted);\n\n      var mutedPromise = _this5.play();\n\n      if (!isPromise(mutedPromise)) {\n        return;\n      }\n\n      return mutedPromise[\"catch\"](restoreMuted);\n    };\n\n    var promise; // if muted defaults to true\n    // the only thing we can do is call play\n\n    if (type === 'any' && this.muted() !== true) {\n      promise = this.play();\n\n      if (isPromise(promise)) {\n        promise = promise[\"catch\"](muted);\n      }\n    } else if (type === 'muted' && this.muted() !== true) {\n      promise = muted();\n    } else {\n      promise = this.play();\n    }\n\n    if (!isPromise(promise)) {\n      return;\n    }\n\n    return promise.then(function () {\n      _this5.trigger({\n        type: 'autoplay-success',\n        autoplay: type\n      });\n    })[\"catch\"](function (e) {\n      _this5.trigger({\n        type: 'autoplay-failure',\n        autoplay: type\n      });\n    });\n  }\n  /**\n   * Update the internal source caches so that we return the correct source from\n   * `src()`, `currentSource()`, and `currentSources()`.\n   *\n   * > Note: `currentSources` will not be updated if the source that is passed in exists\n   *         in the current `currentSources` cache.\n   *\n   *\n   * @param {Tech~SourceObject} srcObj\n   *        A string or object source to update our caches to.\n   */\n  ;\n\n  _proto.updateSourceCaches_ = function updateSourceCaches_(srcObj) {\n    if (srcObj === void 0) {\n      srcObj = '';\n    }\n\n    var src = srcObj;\n    var type = '';\n\n    if (typeof src !== 'string') {\n      src = srcObj.src;\n      type = srcObj.type;\n    } // make sure all the caches are set to default values\n    // to prevent null checking\n\n\n    this.cache_.source = this.cache_.source || {};\n    this.cache_.sources = this.cache_.sources || []; // try to get the type of the src that was passed in\n\n    if (src && !type) {\n      type = findMimetype(this, src);\n    } // update `currentSource` cache always\n\n\n    this.cache_.source = mergeOptions({}, srcObj, {\n      src: src,\n      type: type\n    });\n    var matchingSources = this.cache_.sources.filter(function (s) {\n      return s.src && s.src === src;\n    });\n    var sourceElSources = [];\n    var sourceEls = this.$$('source');\n    var matchingSourceEls = [];\n\n    for (var i = 0; i < sourceEls.length; i++) {\n      var sourceObj = getAttributes(sourceEls[i]);\n      sourceElSources.push(sourceObj);\n\n      if (sourceObj.src && sourceObj.src === src) {\n        matchingSourceEls.push(sourceObj.src);\n      }\n    } // if we have matching source els but not matching sources\n    // the current source cache is not up to date\n\n\n    if (matchingSourceEls.length && !matchingSources.length) {\n      this.cache_.sources = sourceElSources; // if we don't have matching source or source els set the\n      // sources cache to the `currentSource` cache\n    } else if (!matchingSources.length) {\n      this.cache_.sources = [this.cache_.source];\n    } // update the tech `src` cache\n\n\n    this.cache_.src = src;\n  }\n  /**\n   * *EXPERIMENTAL* Fired when the source is set or changed on the {@link Tech}\n   * causing the media element to reload.\n   *\n   * It will fire for the initial source and each subsequent source.\n   * This event is a custom event from Video.js and is triggered by the {@link Tech}.\n   *\n   * The event object for this event contains a `src` property that will contain the source\n   * that was available when the event was triggered. This is generally only necessary if Video.js\n   * is switching techs while the source was being changed.\n   *\n   * It is also fired when `load` is called on the player (or media element)\n   * because the {@link https://html.spec.whatwg.org/multipage/media.html#dom-media-load|specification for `load`}\n   * says that the resource selection algorithm needs to be aborted and restarted.\n   * In this case, it is very likely that the `src` property will be set to the\n   * empty string `\"\"` to indicate we do not know what the source will be but\n   * that it is changing.\n   *\n   * *This event is currently still experimental and may change in minor releases.*\n   * __To use this, pass `enableSourceset` option to the player.__\n   *\n   * @event Player#sourceset\n   * @type {EventTarget~Event}\n   * @prop {string} src\n   *                The source url available when the `sourceset` was triggered.\n   *                It will be an empty string if we cannot know what the source is\n   *                but know that the source will change.\n   */\n\n  /**\n   * Retrigger the `sourceset` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#sourceset\n   * @listens Tech#sourceset\n   * @private\n   */\n  ;\n\n  _proto.handleTechSourceset_ = function handleTechSourceset_(event) {\n    var _this6 = this; // only update the source cache when the source\n    // was not updated using the player api\n\n\n    if (!this.changingSrc_) {\n      var updateSourceCaches = function updateSourceCaches(src) {\n        return _this6.updateSourceCaches_(src);\n      };\n\n      var playerSrc = this.currentSource().src;\n      var eventSrc = event.src; // if we have a playerSrc that is not a blob, and a tech src that is a blob\n\n      if (playerSrc && !/^blob:/.test(playerSrc) && /^blob:/.test(eventSrc)) {\n        // if both the tech source and the player source were updated we assume\n        // something like @videojs/http-streaming did the sourceset and skip updating the source cache.\n        if (!this.lastSource_ || this.lastSource_.tech !== eventSrc && this.lastSource_.player !== playerSrc) {\n          updateSourceCaches = function updateSourceCaches() {};\n        }\n      } // update the source to the intial source right away\n      // in some cases this will be empty string\n\n\n      updateSourceCaches(eventSrc); // if the `sourceset` `src` was an empty string\n      // wait for a `loadstart` to update the cache to `currentSrc`.\n      // If a sourceset happens before a `loadstart`, we reset the state\n\n      if (!event.src) {\n        this.tech_.any(['sourceset', 'loadstart'], function (e) {\n          // if a sourceset happens before a `loadstart` there\n          // is nothing to do as this `handleTechSourceset_`\n          // will be called again and this will be handled there.\n          if (e.type === 'sourceset') {\n            return;\n          }\n\n          var techSrc = _this6.techGet('currentSrc');\n\n          _this6.lastSource_.tech = techSrc;\n\n          _this6.updateSourceCaches_(techSrc);\n        });\n      }\n    }\n\n    this.lastSource_ = {\n      player: this.currentSource().src,\n      tech: event.src\n    };\n    this.trigger({\n      src: event.src,\n      type: 'sourceset'\n    });\n  }\n  /**\n   * Add/remove the vjs-has-started class\n   *\n   * @fires Player#firstplay\n   *\n   * @param {boolean} request\n   *        - true: adds the class\n   *        - false: remove the class\n   *\n   * @return {boolean}\n   *         the boolean value of hasStarted_\n   */\n  ;\n\n  _proto.hasStarted = function hasStarted(request) {\n    if (request === undefined) {\n      // act as getter, if we have no request to change\n      return this.hasStarted_;\n    }\n\n    if (request === this.hasStarted_) {\n      return;\n    }\n\n    this.hasStarted_ = request;\n\n    if (this.hasStarted_) {\n      this.addClass('vjs-has-started');\n      this.trigger('firstplay');\n    } else {\n      this.removeClass('vjs-has-started');\n    }\n  }\n  /**\n   * Fired whenever the media begins or resumes playback\n   *\n   * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-play}\n   * @fires Player#play\n   * @listens Tech#play\n   * @private\n   */\n  ;\n\n  _proto.handleTechPlay_ = function handleTechPlay_() {\n    this.removeClass('vjs-ended');\n    this.removeClass('vjs-paused');\n    this.addClass('vjs-playing'); // hide the poster when the user hits play\n\n    this.hasStarted(true);\n    /**\n     * Triggered whenever an {@link Tech#play} event happens. Indicates that\n     * playback has started or resumed.\n     *\n     * @event Player#play\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('play');\n  }\n  /**\n   * Retrigger the `ratechange` event that was triggered by the {@link Tech}.\n   *\n   * If there were any events queued while the playback rate was zero, fire\n   * those events now.\n   *\n   * @private\n   * @method Player#handleTechRateChange_\n   * @fires Player#ratechange\n   * @listens Tech#ratechange\n   */\n  ;\n\n  _proto.handleTechRateChange_ = function handleTechRateChange_() {\n    if (this.tech_.playbackRate() > 0 && this.cache_.lastPlaybackRate === 0) {\n      this.queuedCallbacks_.forEach(function (queued) {\n        return queued.callback(queued.event);\n      });\n      this.queuedCallbacks_ = [];\n    }\n\n    this.cache_.lastPlaybackRate = this.tech_.playbackRate();\n    /**\n     * Fires when the playing speed of the audio/video is changed\n     *\n     * @event Player#ratechange\n     * @type {event}\n     */\n\n    this.trigger('ratechange');\n  }\n  /**\n   * Retrigger the `waiting` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#waiting\n   * @listens Tech#waiting\n   * @private\n   */\n  ;\n\n  _proto.handleTechWaiting_ = function handleTechWaiting_() {\n    var _this7 = this;\n\n    this.addClass('vjs-waiting');\n    /**\n     * A readyState change on the DOM element has caused playback to stop.\n     *\n     * @event Player#waiting\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('waiting'); // Browsers may emit a timeupdate event after a waiting event. In order to prevent\n    // premature removal of the waiting class, wait for the time to change.\n\n    var timeWhenWaiting = this.currentTime();\n\n    var timeUpdateListener = function timeUpdateListener() {\n      if (timeWhenWaiting !== _this7.currentTime()) {\n        _this7.removeClass('vjs-waiting');\n\n        _this7.off('timeupdate', timeUpdateListener);\n      }\n    };\n\n    this.on('timeupdate', timeUpdateListener);\n  }\n  /**\n   * Retrigger the `canplay` event that was triggered by the {@link Tech}.\n   * > Note: This is not consistent between browsers. See #1351\n   *\n   * @fires Player#canplay\n   * @listens Tech#canplay\n   * @private\n   */\n  ;\n\n  _proto.handleTechCanPlay_ = function handleTechCanPlay_() {\n    this.removeClass('vjs-waiting');\n    /**\n     * The media has a readyState of HAVE_FUTURE_DATA or greater.\n     *\n     * @event Player#canplay\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('canplay');\n  }\n  /**\n   * Retrigger the `canplaythrough` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#canplaythrough\n   * @listens Tech#canplaythrough\n   * @private\n   */\n  ;\n\n  _proto.handleTechCanPlayThrough_ = function handleTechCanPlayThrough_() {\n    this.removeClass('vjs-waiting');\n    /**\n     * The media has a readyState of HAVE_ENOUGH_DATA or greater. This means that the\n     * entire media file can be played without buffering.\n     *\n     * @event Player#canplaythrough\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('canplaythrough');\n  }\n  /**\n   * Retrigger the `playing` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#playing\n   * @listens Tech#playing\n   * @private\n   */\n  ;\n\n  _proto.handleTechPlaying_ = function handleTechPlaying_() {\n    this.removeClass('vjs-waiting');\n    /**\n     * The media is no longer blocked from playback, and has started playing.\n     *\n     * @event Player#playing\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('playing');\n  }\n  /**\n   * Retrigger the `seeking` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#seeking\n   * @listens Tech#seeking\n   * @private\n   */\n  ;\n\n  _proto.handleTechSeeking_ = function handleTechSeeking_() {\n    this.addClass('vjs-seeking');\n    /**\n     * Fired whenever the player is jumping to a new time\n     *\n     * @event Player#seeking\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('seeking');\n  }\n  /**\n   * Retrigger the `seeked` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#seeked\n   * @listens Tech#seeked\n   * @private\n   */\n  ;\n\n  _proto.handleTechSeeked_ = function handleTechSeeked_() {\n    this.removeClass('vjs-seeking');\n    this.removeClass('vjs-ended');\n    /**\n     * Fired when the player has finished jumping to a new time\n     *\n     * @event Player#seeked\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('seeked');\n  }\n  /**\n   * Retrigger the `firstplay` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#firstplay\n   * @listens Tech#firstplay\n   * @deprecated As of 6.0 firstplay event is deprecated.\n   *             As of 6.0 passing the `starttime` option to the player and the firstplay event are deprecated.\n   * @private\n   */\n  ;\n\n  _proto.handleTechFirstPlay_ = function handleTechFirstPlay_() {\n    // If the first starttime attribute is specified\n    // then we will start at the given offset in seconds\n    if (this.options_.starttime) {\n      log.warn('Passing the `starttime` option to the player will be deprecated in 6.0');\n      this.currentTime(this.options_.starttime);\n    }\n\n    this.addClass('vjs-has-started');\n    /**\n     * Fired the first time a video is played. Not part of the HLS spec, and this is\n     * probably not the best implementation yet, so use sparingly. If you don't have a\n     * reason to prevent playback, use `myPlayer.one('play');` instead.\n     *\n     * @event Player#firstplay\n     * @deprecated As of 6.0 firstplay event is deprecated.\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('firstplay');\n  }\n  /**\n   * Retrigger the `pause` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#pause\n   * @listens Tech#pause\n   * @private\n   */\n  ;\n\n  _proto.handleTechPause_ = function handleTechPause_() {\n    this.removeClass('vjs-playing');\n    this.addClass('vjs-paused');\n    /**\n     * Fired whenever the media has been paused\n     *\n     * @event Player#pause\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('pause');\n  }\n  /**\n   * Retrigger the `ended` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#ended\n   * @listens Tech#ended\n   * @private\n   */\n  ;\n\n  _proto.handleTechEnded_ = function handleTechEnded_() {\n    this.addClass('vjs-ended');\n\n    if (this.options_.loop) {\n      this.currentTime(0);\n      this.play();\n    } else if (!this.paused()) {\n      this.pause();\n    }\n    /**\n     * Fired when the end of the media resource is reached (currentTime == duration)\n     *\n     * @event Player#ended\n     * @type {EventTarget~Event}\n     */\n\n\n    this.trigger('ended');\n  }\n  /**\n   * Fired when the duration of the media resource is first known or changed\n   *\n   * @listens Tech#durationchange\n   * @private\n   */\n  ;\n\n  _proto.handleTechDurationChange_ = function handleTechDurationChange_() {\n    this.duration(this.techGet_('duration'));\n  }\n  /**\n   * Handle a click on the media element to play/pause\n   *\n   * @param {EventTarget~Event} event\n   *        the event that caused this function to trigger\n   *\n   * @listens Tech#mouseup\n   * @private\n   */\n  ;\n\n  _proto.handleTechClick_ = function handleTechClick_(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    } // When controls are disabled a click should not toggle playback because\n    // the click is considered a control\n\n\n    if (!this.controls_) {\n      return;\n    }\n\n    if (this.paused()) {\n      silencePromise(this.play());\n    } else {\n      this.pause();\n    }\n  }\n  /**\n   * Handle a double-click on the media element to enter/exit fullscreen\n   *\n   * @param {EventTarget~Event} event\n   *        the event that caused this function to trigger\n   *\n   * @listens Tech#dblclick\n   * @private\n   */\n  ;\n\n  _proto.handleTechDoubleClick_ = function handleTechDoubleClick_(event) {\n    if (!this.controls_) {\n      return;\n    } // we do not want to toggle fullscreen state\n    // when double-clicking inside a control bar or a modal\n\n\n    var inAllowedEls = Array.prototype.some.call(this.$$('.vjs-control-bar, .vjs-modal-dialog'), function (el) {\n      return el.contains(event.target);\n    });\n\n    if (!inAllowedEls) {\n      /*\n       * options.userActions.doubleClick\n       *\n       * If `undefined` or `true`, double-click toggles fullscreen if controls are present\n       * Set to `false` to disable double-click handling\n       * Set to a function to substitute an external double-click handler\n       */\n      if (this.options_ === undefined || this.options_.userActions === undefined || this.options_.userActions.doubleClick === undefined || this.options_.userActions.doubleClick !== false) {\n        if (this.options_ !== undefined && this.options_.userActions !== undefined && typeof this.options_.userActions.doubleClick === 'function') {\n          this.options_.userActions.doubleClick.call(this, event);\n        } else if (this.isFullscreen()) {\n          this.exitFullscreen();\n        } else {\n          this.requestFullscreen();\n        }\n      }\n    }\n  }\n  /**\n   * Handle a tap on the media element. It will toggle the user\n   * activity state, which hides and shows the controls.\n   *\n   * @listens Tech#tap\n   * @private\n   */\n  ;\n\n  _proto.handleTechTap_ = function handleTechTap_() {\n    this.userActive(!this.userActive());\n  }\n  /**\n   * Handle touch to start\n   *\n   * @listens Tech#touchstart\n   * @private\n   */\n  ;\n\n  _proto.handleTechTouchStart_ = function handleTechTouchStart_() {\n    this.userWasActive = this.userActive();\n  }\n  /**\n   * Handle touch to move\n   *\n   * @listens Tech#touchmove\n   * @private\n   */\n  ;\n\n  _proto.handleTechTouchMove_ = function handleTechTouchMove_() {\n    if (this.userWasActive) {\n      this.reportUserActivity();\n    }\n  }\n  /**\n   * Handle touch to end\n   *\n   * @param {EventTarget~Event} event\n   *        the touchend event that triggered\n   *        this function\n   *\n   * @listens Tech#touchend\n   * @private\n   */\n  ;\n\n  _proto.handleTechTouchEnd_ = function handleTechTouchEnd_(event) {\n    // Stop the mouse events from also happening\n    event.preventDefault();\n  }\n  /**\n   * native click events on the SWF aren't triggered on IE11, Win8.1RT\n   * use stageclick events triggered from inside the SWF instead\n   *\n   * @private\n   * @listens stageclick\n   */\n  ;\n\n  _proto.handleStageClick_ = function handleStageClick_() {\n    this.reportUserActivity();\n  }\n  /**\n   * @private\n   */\n  ;\n\n  _proto.toggleFullscreenClass_ = function toggleFullscreenClass_() {\n    if (this.isFullscreen()) {\n      this.addClass('vjs-fullscreen');\n    } else {\n      this.removeClass('vjs-fullscreen');\n    }\n  }\n  /**\n   * when the document fschange event triggers it calls this\n   */\n  ;\n\n  _proto.documentFullscreenChange_ = function documentFullscreenChange_(e) {\n    var el = this.el();\n    var isFs = document[this.fsApi_.fullscreenElement] === el;\n\n    if (!isFs && el.matches) {\n      isFs = el.matches(':' + this.fsApi_.fullscreen);\n    } else if (!isFs && el.msMatchesSelector) {\n      isFs = el.msMatchesSelector(':' + this.fsApi_.fullscreen);\n    }\n\n    this.isFullscreen(isFs); // If cancelling fullscreen, remove event listener.\n\n    if (this.isFullscreen() === false) {\n      off(document, this.fsApi_.fullscreenchange, this.boundDocumentFullscreenChange_);\n    }\n\n    if (this.fsApi_.prefixed) {\n      /**\n       * @event Player#fullscreenchange\n       * @type {EventTarget~Event}\n       */\n      this.trigger('fullscreenchange');\n    }\n  }\n  /**\n   * Handle Tech Fullscreen Change\n   *\n   * @param {EventTarget~Event} event\n   *        the fullscreenchange event that triggered this function\n   *\n   * @param {Object} data\n   *        the data that was sent with the event\n   *\n   * @private\n   * @listens Tech#fullscreenchange\n   * @fires Player#fullscreenchange\n   */\n  ;\n\n  _proto.handleTechFullscreenChange_ = function handleTechFullscreenChange_(event, data) {\n    if (data) {\n      this.isFullscreen(data.isFullscreen);\n    }\n    /**\n     * Fired when going in and out of fullscreen.\n     *\n     * @event Player#fullscreenchange\n     * @type {EventTarget~Event}\n     */\n\n\n    this.trigger('fullscreenchange');\n  }\n  /**\n   * @private\n   */\n  ;\n\n  _proto.togglePictureInPictureClass_ = function togglePictureInPictureClass_() {\n    if (this.isInPictureInPicture()) {\n      this.addClass('vjs-picture-in-picture');\n    } else {\n      this.removeClass('vjs-picture-in-picture');\n    }\n  }\n  /**\n   * Handle Tech Enter Picture-in-Picture.\n   *\n   * @param {EventTarget~Event} event\n   *        the enterpictureinpicture event that triggered this function\n   *\n   * @private\n   * @listens Tech#enterpictureinpicture\n   */\n  ;\n\n  _proto.handleTechEnterPictureInPicture_ = function handleTechEnterPictureInPicture_(event) {\n    this.isInPictureInPicture(true);\n  }\n  /**\n   * Handle Tech Leave Picture-in-Picture.\n   *\n   * @param {EventTarget~Event} event\n   *        the leavepictureinpicture event that triggered this function\n   *\n   * @private\n   * @listens Tech#leavepictureinpicture\n   */\n  ;\n\n  _proto.handleTechLeavePictureInPicture_ = function handleTechLeavePictureInPicture_(event) {\n    this.isInPictureInPicture(false);\n  }\n  /**\n   * Fires when an error occurred during the loading of an audio/video.\n   *\n   * @private\n   * @listens Tech#error\n   */\n  ;\n\n  _proto.handleTechError_ = function handleTechError_() {\n    var error = this.tech_.error();\n    this.error(error);\n  }\n  /**\n   * Retrigger the `textdata` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#textdata\n   * @listens Tech#textdata\n   * @private\n   */\n  ;\n\n  _proto.handleTechTextData_ = function handleTechTextData_() {\n    var data = null;\n\n    if (arguments.length > 1) {\n      data = arguments[1];\n    }\n    /**\n     * Fires when we get a textdata event from tech\n     *\n     * @event Player#textdata\n     * @type {EventTarget~Event}\n     */\n\n\n    this.trigger('textdata', data);\n  }\n  /**\n   * Get object for cached values.\n   *\n   * @return {Object}\n   *         get the current object cache\n   */\n  ;\n\n  _proto.getCache = function getCache() {\n    return this.cache_;\n  }\n  /**\n   * Resets the internal cache object.\n   *\n   * Using this function outside the player constructor or reset method may\n   * have unintended side-effects.\n   *\n   * @private\n   */\n  ;\n\n  _proto.resetCache_ = function resetCache_() {\n    this.cache_ = {\n      // Right now, the currentTime is not _really_ cached because it is always\n      // retrieved from the tech (see: currentTime). However, for completeness,\n      // we set it to zero here to ensure that if we do start actually caching\n      // it, we reset it along with everything else.\n      currentTime: 0,\n      inactivityTimeout: this.options_.inactivityTimeout,\n      duration: NaN,\n      lastVolume: 1,\n      lastPlaybackRate: this.defaultPlaybackRate(),\n      media: null,\n      src: '',\n      source: {},\n      sources: [],\n      volume: 1\n    };\n  }\n  /**\n   * Pass values to the playback tech\n   *\n   * @param {string} [method]\n   *        the method to call\n   *\n   * @param {Object} arg\n   *        the argument to pass\n   *\n   * @private\n   */\n  ;\n\n  _proto.techCall_ = function techCall_(method, arg) {\n    // If it's not ready yet, call method when it is\n    this.ready(function () {\n      if (method in allowedSetters) {\n        return set(this.middleware_, this.tech_, method, arg);\n      } else if (method in allowedMediators) {\n        return mediate(this.middleware_, this.tech_, method, arg);\n      }\n\n      try {\n        if (this.tech_) {\n          this.tech_[method](arg);\n        }\n      } catch (e) {\n        log(e);\n        throw e;\n      }\n    }, true);\n  }\n  /**\n   * Get calls can't wait for the tech, and sometimes don't need to.\n   *\n   * @param {string} method\n   *        Tech method\n   *\n   * @return {Function|undefined}\n   *         the method or undefined\n   *\n   * @private\n   */\n  ;\n\n  _proto.techGet_ = function techGet_(method) {\n    if (!this.tech_ || !this.tech_.isReady_) {\n      return;\n    }\n\n    if (method in allowedGetters) {\n      return get(this.middleware_, this.tech_, method);\n    } else if (method in allowedMediators) {\n      return mediate(this.middleware_, this.tech_, method);\n    } // Flash likes to die and reload when you hide or reposition it.\n    // In these cases the object methods go away and we get errors.\n    // When that happens we'll catch the errors and inform tech that it's not ready any more.\n\n\n    try {\n      return this.tech_[method]();\n    } catch (e) {\n      // When building additional tech libs, an expected method may not be defined yet\n      if (this.tech_[method] === undefined) {\n        log(\"Video.js: \" + method + \" method not defined for \" + this.techName_ + \" playback technology.\", e);\n        throw e;\n      } // When a method isn't available on the object it throws a TypeError\n\n\n      if (e.name === 'TypeError') {\n        log(\"Video.js: \" + method + \" unavailable on \" + this.techName_ + \" playback technology element.\", e);\n        this.tech_.isReady_ = false;\n        throw e;\n      } // If error unknown, just log and throw\n\n\n      log(e);\n      throw e;\n    }\n  }\n  /**\n   * Attempt to begin playback at the first opportunity.\n   *\n   * @return {Promise|undefined}\n   *         Returns a promise if the browser supports Promises (or one\n   *         was passed in as an option). This promise will be resolved on\n   *         the return value of play. If this is undefined it will fulfill the\n   *         promise chain otherwise the promise chain will be fulfilled when\n   *         the promise from play is fulfilled.\n   */\n  ;\n\n  _proto.play = function play() {\n    var _this8 = this;\n\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (PromiseClass) {\n      return new PromiseClass(function (resolve) {\n        _this8.play_(resolve);\n      });\n    }\n\n    return this.play_();\n  }\n  /**\n   * The actual logic for play, takes a callback that will be resolved on the\n   * return value of play. This allows us to resolve to the play promise if there\n   * is one on modern browsers.\n   *\n   * @private\n   * @param {Function} [callback]\n   *        The callback that should be called when the techs play is actually called\n   */\n  ;\n\n  _proto.play_ = function play_(callback) {\n    var _this9 = this;\n\n    if (callback === void 0) {\n      callback = silencePromise;\n    }\n\n    this.playCallbacks_.push(callback);\n    var isSrcReady = Boolean(!this.changingSrc_ && (this.src() || this.currentSrc())); // treat calls to play_ somewhat like the `one` event function\n\n    if (this.waitToPlay_) {\n      this.off(['ready', 'loadstart'], this.waitToPlay_);\n      this.waitToPlay_ = null;\n    } // if the player/tech is not ready or the src itself is not ready\n    // queue up a call to play on `ready` or `loadstart`\n\n\n    if (!this.isReady_ || !isSrcReady) {\n      this.waitToPlay_ = function (e) {\n        _this9.play_();\n      };\n\n      this.one(['ready', 'loadstart'], this.waitToPlay_); // if we are in Safari, there is a high chance that loadstart will trigger after the gesture timeperiod\n      // in that case, we need to prime the video element by calling load so it'll be ready in time\n\n      if (!isSrcReady && (IS_ANY_SAFARI || IS_IOS)) {\n        this.load();\n      }\n\n      return;\n    } // If the player/tech is ready and we have a source, we can attempt playback.\n\n\n    var val = this.techGet_('play'); // play was terminated if the returned value is null\n\n    if (val === null) {\n      this.runPlayTerminatedQueue_();\n    } else {\n      this.runPlayCallbacks_(val);\n    }\n  }\n  /**\n   * These functions will be run when if play is terminated. If play\n   * runPlayCallbacks_ is run these function will not be run. This allows us\n   * to differenciate between a terminated play and an actual call to play.\n   */\n  ;\n\n  _proto.runPlayTerminatedQueue_ = function runPlayTerminatedQueue_() {\n    var queue = this.playTerminatedQueue_.slice(0);\n    this.playTerminatedQueue_ = [];\n    queue.forEach(function (q) {\n      q();\n    });\n  }\n  /**\n   * When a callback to play is delayed we have to run these\n   * callbacks when play is actually called on the tech. This function\n   * runs the callbacks that were delayed and accepts the return value\n   * from the tech.\n   *\n   * @param {undefined|Promise} val\n   *        The return value from the tech.\n   */\n  ;\n\n  _proto.runPlayCallbacks_ = function runPlayCallbacks_(val) {\n    var callbacks = this.playCallbacks_.slice(0);\n    this.playCallbacks_ = []; // clear play terminatedQueue since we finished a real play\n\n    this.playTerminatedQueue_ = [];\n    callbacks.forEach(function (cb) {\n      cb(val);\n    });\n  }\n  /**\n   * Pause the video playback\n   *\n   * @return {Player}\n   *         A reference to the player object this function was called on\n   */\n  ;\n\n  _proto.pause = function pause() {\n    this.techCall_('pause');\n  }\n  /**\n   * Check if the player is paused or has yet to play\n   *\n   * @return {boolean}\n   *         - false: if the media is currently playing\n   *         - true: if media is not currently playing\n   */\n  ;\n\n  _proto.paused = function paused() {\n    // The initial state of paused should be true (in Safari it's actually false)\n    return this.techGet_('paused') === false ? false : true;\n  }\n  /**\n   * Get a TimeRange object representing the current ranges of time that the user\n   * has played.\n   *\n   * @return {TimeRange}\n   *         A time range object that represents all the increments of time that have\n   *         been played.\n   */\n  ;\n\n  _proto.played = function played() {\n    return this.techGet_('played') || createTimeRanges(0, 0);\n  }\n  /**\n   * Returns whether or not the user is \"scrubbing\". Scrubbing is\n   * when the user has clicked the progress bar handle and is\n   * dragging it along the progress bar.\n   *\n   * @param {boolean} [isScrubbing]\n   *        whether the user is or is not scrubbing\n   *\n   * @return {boolean}\n   *         The value of scrubbing when getting\n   */\n  ;\n\n  _proto.scrubbing = function scrubbing(isScrubbing) {\n    if (typeof isScrubbing === 'undefined') {\n      return this.scrubbing_;\n    }\n\n    this.scrubbing_ = !!isScrubbing;\n\n    if (isScrubbing) {\n      this.addClass('vjs-scrubbing');\n    } else {\n      this.removeClass('vjs-scrubbing');\n    }\n  }\n  /**\n   * Get or set the current time (in seconds)\n   *\n   * @param {number|string} [seconds]\n   *        The time to seek to in seconds\n   *\n   * @return {number}\n   *         - the current time in seconds when getting\n   */\n  ;\n\n  _proto.currentTime = function currentTime(seconds) {\n    if (typeof seconds !== 'undefined') {\n      if (seconds < 0) {\n        seconds = 0;\n      }\n\n      this.techCall_('setCurrentTime', seconds);\n      return;\n    } // cache last currentTime and return. default to 0 seconds\n    //\n    // Caching the currentTime is meant to prevent a massive amount of reads on the tech's\n    // currentTime when scrubbing, but may not provide much performance benefit afterall.\n    // Should be tested. Also something has to read the actual current time or the cache will\n    // never get updated.\n\n\n    this.cache_.currentTime = this.techGet_('currentTime') || 0;\n    return this.cache_.currentTime;\n  }\n  /**\n   * Normally gets the length in time of the video in seconds;\n   * in all but the rarest use cases an argument will NOT be passed to the method\n   *\n   * > **NOTE**: The video must have started loading before the duration can be\n   * known, and in the case of Flash, may not be known until the video starts\n   * playing.\n   *\n   * @fires Player#durationchange\n   *\n   * @param {number} [seconds]\n   *        The duration of the video to set in seconds\n   *\n   * @return {number}\n   *         - The duration of the video in seconds when getting\n   */\n  ;\n\n  _proto.duration = function duration(seconds) {\n    if (seconds === undefined) {\n      // return NaN if the duration is not known\n      return this.cache_.duration !== undefined ? this.cache_.duration : NaN;\n    }\n\n    seconds = parseFloat(seconds); // Standardize on Infinity for signaling video is live\n\n    if (seconds < 0) {\n      seconds = Infinity;\n    }\n\n    if (seconds !== this.cache_.duration) {\n      // Cache the last set value for optimized scrubbing (esp. Flash)\n      this.cache_.duration = seconds;\n\n      if (seconds === Infinity) {\n        this.addClass('vjs-live');\n\n        if (this.options_.liveui && this.player_.liveTracker) {\n          this.addClass('vjs-liveui');\n        }\n      } else {\n        this.removeClass('vjs-live');\n        this.removeClass('vjs-liveui');\n      }\n\n      if (!isNaN(seconds)) {\n        // Do not fire durationchange unless the duration value is known.\n        // @see [Spec]{@link https://www.w3.org/TR/2011/WD-html5-20110113/video.html#media-element-load-algorithm}\n\n        /**\n         * @event Player#durationchange\n         * @type {EventTarget~Event}\n         */\n        this.trigger('durationchange');\n      }\n    }\n  }\n  /**\n   * Calculates how much time is left in the video. Not part\n   * of the native video API.\n   *\n   * @return {number}\n   *         The time remaining in seconds\n   */\n  ;\n\n  _proto.remainingTime = function remainingTime() {\n    return this.duration() - this.currentTime();\n  }\n  /**\n   * A remaining time function that is intented to be used when\n   * the time is to be displayed directly to the user.\n   *\n   * @return {number}\n   *         The rounded time remaining in seconds\n   */\n  ;\n\n  _proto.remainingTimeDisplay = function remainingTimeDisplay() {\n    return Math.floor(this.duration()) - Math.floor(this.currentTime());\n  } //\n  // Kind of like an array of portions of the video that have been downloaded.\n\n  /**\n   * Get a TimeRange object with an array of the times of the video\n   * that have been downloaded. If you just want the percent of the\n   * video that's been downloaded, use bufferedPercent.\n   *\n   * @see [Buffered Spec]{@link http://dev.w3.org/html5/spec/video.html#dom-media-buffered}\n   *\n   * @return {TimeRange}\n   *         A mock TimeRange object (following HTML spec)\n   */\n  ;\n\n  _proto.buffered = function buffered() {\n    var buffered = this.techGet_('buffered');\n\n    if (!buffered || !buffered.length) {\n      buffered = createTimeRanges(0, 0);\n    }\n\n    return buffered;\n  }\n  /**\n   * Get the percent (as a decimal) of the video that's been downloaded.\n   * This method is not a part of the native HTML video API.\n   *\n   * @return {number}\n   *         A decimal between 0 and 1 representing the percent\n   *         that is buffered 0 being 0% and 1 being 100%\n   */\n  ;\n\n  _proto.bufferedPercent = function bufferedPercent$1() {\n    return bufferedPercent(this.buffered(), this.duration());\n  }\n  /**\n   * Get the ending time of the last buffered time range\n   * This is used in the progress bar to encapsulate all time ranges.\n   *\n   * @return {number}\n   *         The end of the last buffered time range\n   */\n  ;\n\n  _proto.bufferedEnd = function bufferedEnd() {\n    var buffered = this.buffered();\n    var duration = this.duration();\n    var end = buffered.end(buffered.length - 1);\n\n    if (end > duration) {\n      end = duration;\n    }\n\n    return end;\n  }\n  /**\n   * Get or set the current volume of the media\n   *\n   * @param  {number} [percentAsDecimal]\n   *         The new volume as a decimal percent:\n   *         - 0 is muted/0%/off\n   *         - 1.0 is 100%/full\n   *         - 0.5 is half volume or 50%\n   *\n   * @return {number}\n   *         The current volume as a percent when getting\n   */\n  ;\n\n  _proto.volume = function volume(percentAsDecimal) {\n    var vol;\n\n    if (percentAsDecimal !== undefined) {\n      // Force value to between 0 and 1\n      vol = Math.max(0, Math.min(1, parseFloat(percentAsDecimal)));\n      this.cache_.volume = vol;\n      this.techCall_('setVolume', vol);\n\n      if (vol > 0) {\n        this.lastVolume_(vol);\n      }\n\n      return;\n    } // Default to 1 when returning current volume.\n\n\n    vol = parseFloat(this.techGet_('volume'));\n    return isNaN(vol) ? 1 : vol;\n  }\n  /**\n   * Get the current muted state, or turn mute on or off\n   *\n   * @param {boolean} [muted]\n   *        - true to mute\n   *        - false to unmute\n   *\n   * @return {boolean}\n   *         - true if mute is on and getting\n   *         - false if mute is off and getting\n   */\n  ;\n\n  _proto.muted = function muted(_muted) {\n    if (_muted !== undefined) {\n      this.techCall_('setMuted', _muted);\n      return;\n    }\n\n    return this.techGet_('muted') || false;\n  }\n  /**\n   * Get the current defaultMuted state, or turn defaultMuted on or off. defaultMuted\n   * indicates the state of muted on initial playback.\n   *\n   * ```js\n   *   var myPlayer = videojs('some-player-id');\n   *\n   *   myPlayer.src(\"http://www.example.com/path/to/video.mp4\");\n   *\n   *   // get, should be false\n   *   console.log(myPlayer.defaultMuted());\n   *   // set to true\n   *   myPlayer.defaultMuted(true);\n   *   // get should be true\n   *   console.log(myPlayer.defaultMuted());\n   * ```\n   *\n   * @param {boolean} [defaultMuted]\n   *        - true to mute\n   *        - false to unmute\n   *\n   * @return {boolean|Player}\n   *         - true if defaultMuted is on and getting\n   *         - false if defaultMuted is off and getting\n   *         - A reference to the current player when setting\n   */\n  ;\n\n  _proto.defaultMuted = function defaultMuted(_defaultMuted) {\n    if (_defaultMuted !== undefined) {\n      return this.techCall_('setDefaultMuted', _defaultMuted);\n    }\n\n    return this.techGet_('defaultMuted') || false;\n  }\n  /**\n   * Get the last volume, or set it\n   *\n   * @param  {number} [percentAsDecimal]\n   *         The new last volume as a decimal percent:\n   *         - 0 is muted/0%/off\n   *         - 1.0 is 100%/full\n   *         - 0.5 is half volume or 50%\n   *\n   * @return {number}\n   *         the current value of lastVolume as a percent when getting\n   *\n   * @private\n   */\n  ;\n\n  _proto.lastVolume_ = function lastVolume_(percentAsDecimal) {\n    if (percentAsDecimal !== undefined && percentAsDecimal !== 0) {\n      this.cache_.lastVolume = percentAsDecimal;\n      return;\n    }\n\n    return this.cache_.lastVolume;\n  }\n  /**\n   * Check if current tech can support native fullscreen\n   * (e.g. with built in controls like iOS, so not our flash swf)\n   *\n   * @return {boolean}\n   *         if native fullscreen is supported\n   */\n  ;\n\n  _proto.supportsFullScreen = function supportsFullScreen() {\n    return this.techGet_('supportsFullScreen') || false;\n  }\n  /**\n   * Check if the player is in fullscreen mode or tell the player that it\n   * is or is not in fullscreen mode.\n   *\n   * > NOTE: As of the latest HTML5 spec, isFullscreen is no longer an official\n   * property and instead document.fullscreenElement is used. But isFullscreen is\n   * still a valuable property for internal player workings.\n   *\n   * @param  {boolean} [isFS]\n   *         Set the players current fullscreen state\n   *\n   * @return {boolean}\n   *         - true if fullscreen is on and getting\n   *         - false if fullscreen is off and getting\n   */\n  ;\n\n  _proto.isFullscreen = function isFullscreen(isFS) {\n    if (isFS !== undefined) {\n      this.isFullscreen_ = !!isFS;\n      this.toggleFullscreenClass_();\n      return;\n    }\n\n    return !!this.isFullscreen_;\n  }\n  /**\n   * Increase the size of the video to full screen\n   * In some browsers, full screen is not supported natively, so it enters\n   * \"full window mode\", where the video fills the browser window.\n   * In browsers and devices that support native full screen, sometimes the\n   * browser's default controls will be shown, and not the Video.js custom skin.\n   * This includes most mobile devices (iOS, Android) and older versions of\n   * Safari.\n   *\n   * @param  {Object} [fullscreenOptions]\n   *         Override the player fullscreen options\n   *\n   * @fires Player#fullscreenchange\n   */\n  ;\n\n  _proto.requestFullscreen = function requestFullscreen(fullscreenOptions) {\n    var fsOptions;\n    this.isFullscreen(true);\n\n    if (this.fsApi_.requestFullscreen) {\n      // the browser supports going fullscreen at the element level so we can\n      // take the controls fullscreen as well as the video\n      // Trigger fullscreenchange event after change\n      // We have to specifically add this each time, and remove\n      // when canceling fullscreen. Otherwise if there's multiple\n      // players on a page, they would all be reacting to the same fullscreen\n      // events\n      on(document, this.fsApi_.fullscreenchange, this.boundDocumentFullscreenChange_); // only pass FullscreenOptions to requestFullscreen if it isn't prefixed\n\n      if (!this.fsApi_.prefixed) {\n        fsOptions = this.options_.fullscreen && this.options_.fullscreen.options || {};\n\n        if (fullscreenOptions !== undefined) {\n          fsOptions = fullscreenOptions;\n        }\n      }\n\n      silencePromise(this.el_[this.fsApi_.requestFullscreen](fsOptions));\n    } else if (this.tech_.supportsFullScreen()) {\n      // we can't take the video.js controls fullscreen but we can go fullscreen\n      // with native controls\n      this.techCall_('enterFullScreen');\n    } else {\n      // fullscreen isn't supported so we'll just stretch the video element to\n      // fill the viewport\n      this.enterFullWindow();\n      /**\n       * @event Player#fullscreenchange\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('fullscreenchange');\n    }\n  }\n  /**\n   * Return the video to its normal size after having been in full screen mode\n   *\n   * @fires Player#fullscreenchange\n   */\n  ;\n\n  _proto.exitFullscreen = function exitFullscreen() {\n    this.isFullscreen(false); // Check for browser element fullscreen support\n\n    if (this.fsApi_.requestFullscreen) {\n      silencePromise(document[this.fsApi_.exitFullscreen]());\n    } else if (this.tech_.supportsFullScreen()) {\n      this.techCall_('exitFullScreen');\n    } else {\n      this.exitFullWindow();\n      /**\n       * @event Player#fullscreenchange\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('fullscreenchange');\n    }\n  }\n  /**\n   * When fullscreen isn't supported we can stretch the\n   * video container to as wide as the browser will let us.\n   *\n   * @fires Player#enterFullWindow\n   */\n  ;\n\n  _proto.enterFullWindow = function enterFullWindow() {\n    this.isFullWindow = true; // Storing original doc overflow value to return to when fullscreen is off\n\n    this.docOrigOverflow = document.documentElement.style.overflow; // Add listener for esc key to exit fullscreen\n\n    on(document, 'keydown', this.boundFullWindowOnEscKey_); // Hide any scroll bars\n\n    document.documentElement.style.overflow = 'hidden'; // Apply fullscreen styles\n\n    addClass(document.body, 'vjs-full-window');\n    /**\n     * @event Player#enterFullWindow\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('enterFullWindow');\n  }\n  /**\n   * Check for call to either exit full window or\n   * full screen on ESC key\n   *\n   * @param {string} event\n   *        Event to check for key press\n   */\n  ;\n\n  _proto.fullWindowOnEscKey = function fullWindowOnEscKey(event) {\n    if (keycode.isEventKey(event, 'Esc')) {\n      if (this.isFullscreen() === true) {\n        this.exitFullscreen();\n      } else {\n        this.exitFullWindow();\n      }\n    }\n  }\n  /**\n   * Exit full window\n   *\n   * @fires Player#exitFullWindow\n   */\n  ;\n\n  _proto.exitFullWindow = function exitFullWindow() {\n    this.isFullWindow = false;\n    off(document, 'keydown', this.boundFullWindowOnEscKey_); // Unhide scroll bars.\n\n    document.documentElement.style.overflow = this.docOrigOverflow; // Remove fullscreen styles\n\n    removeClass(document.body, 'vjs-full-window'); // Resize the box, controller, and poster to original sizes\n    // this.positionAll();\n\n    /**\n     * @event Player#exitFullWindow\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('exitFullWindow');\n  }\n  /**\n   * Check if the player is in Picture-in-Picture mode or tell the player that it\n   * is or is not in Picture-in-Picture mode.\n   *\n   * @param  {boolean} [isPiP]\n   *         Set the players current Picture-in-Picture state\n   *\n   * @return {boolean}\n   *         - true if Picture-in-Picture is on and getting\n   *         - false if Picture-in-Picture is off and getting\n   */\n  ;\n\n  _proto.isInPictureInPicture = function isInPictureInPicture(isPiP) {\n    if (isPiP !== undefined) {\n      this.isInPictureInPicture_ = !!isPiP;\n      this.togglePictureInPictureClass_();\n      return;\n    }\n\n    return !!this.isInPictureInPicture_;\n  }\n  /**\n   * Create a floating video window always on top of other windows so that users may\n   * continue consuming media while they interact with other content sites, or\n   * applications on their device.\n   *\n   * @see [Spec]{@link https://wicg.github.io/picture-in-picture}\n   *\n   * @fires Player#enterpictureinpicture\n   *\n   * @return {Promise}\n   *         A promise with a Picture-in-Picture window.\n   */\n  ;\n\n  _proto.requestPictureInPicture = function requestPictureInPicture() {\n    if ('pictureInPictureEnabled' in document) {\n      /**\n       * This event fires when the player enters picture in picture mode\n       *\n       * @event Player#enterpictureinpicture\n       * @type {EventTarget~Event}\n       */\n      return this.techGet_('requestPictureInPicture');\n    }\n  }\n  /**\n   * Exit Picture-in-Picture mode.\n   *\n   * @see [Spec]{@link https://wicg.github.io/picture-in-picture}\n   *\n   * @fires Player#leavepictureinpicture\n   *\n   * @return {Promise}\n   *         A promise.\n   */\n  ;\n\n  _proto.exitPictureInPicture = function exitPictureInPicture() {\n    if ('pictureInPictureEnabled' in document) {\n      /**\n       * This event fires when the player leaves picture in picture mode\n       *\n       * @event Player#leavepictureinpicture\n       * @type {EventTarget~Event}\n       */\n      return document.exitPictureInPicture();\n    }\n  }\n  /**\n   * Called when this Player has focus and a key gets pressed down, or when\n   * any Component of this player receives a key press that it doesn't handle.\n   * This allows player-wide hotkeys (either as defined below, or optionally\n   * by an external function).\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    var userActions = this.options_.userActions; // Bail out if hotkeys are not configured.\n\n    if (!userActions || !userActions.hotkeys) {\n      return;\n    } // Function that determines whether or not to exclude an element from\n    // hotkeys handling.\n\n\n    var excludeElement = function excludeElement(el) {\n      var tagName = el.tagName.toLowerCase(); // The first and easiest test is for `contenteditable` elements.\n\n      if (el.isContentEditable) {\n        return true;\n      } // Inputs matching these types will still trigger hotkey handling as\n      // they are not text inputs.\n\n\n      var allowedInputTypes = ['button', 'checkbox', 'hidden', 'radio', 'reset', 'submit'];\n\n      if (tagName === 'input') {\n        return allowedInputTypes.indexOf(el.type) === -1;\n      } // The final test is by tag name. These tags will be excluded entirely.\n\n\n      var excludedTags = ['textarea'];\n      return excludedTags.indexOf(tagName) !== -1;\n    }; // Bail out if the user is focused on an interactive form element.\n\n\n    if (excludeElement(this.el_.ownerDocument.activeElement)) {\n      return;\n    }\n\n    if (typeof userActions.hotkeys === 'function') {\n      userActions.hotkeys.call(this, event);\n    } else {\n      this.handleHotkeys(event);\n    }\n  }\n  /**\n   * Called when this Player receives a hotkey keydown event.\n   * Supported player-wide hotkeys are:\n   *\n   *   f          - toggle fullscreen\n   *   m          - toggle mute\n   *   k or Space - toggle play/pause\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleHotkeys = function handleHotkeys(event) {\n    var hotkeys = this.options_.userActions ? this.options_.userActions.hotkeys : {}; // set fullscreenKey, muteKey, playPauseKey from `hotkeys`, use defaults if not set\n\n    var _hotkeys$fullscreenKe = hotkeys.fullscreenKey,\n        fullscreenKey = _hotkeys$fullscreenKe === void 0 ? function (keydownEvent) {\n      return keycode.isEventKey(keydownEvent, 'f');\n    } : _hotkeys$fullscreenKe,\n        _hotkeys$muteKey = hotkeys.muteKey,\n        muteKey = _hotkeys$muteKey === void 0 ? function (keydownEvent) {\n      return keycode.isEventKey(keydownEvent, 'm');\n    } : _hotkeys$muteKey,\n        _hotkeys$playPauseKey = hotkeys.playPauseKey,\n        playPauseKey = _hotkeys$playPauseKey === void 0 ? function (keydownEvent) {\n      return keycode.isEventKey(keydownEvent, 'k') || keycode.isEventKey(keydownEvent, 'Space');\n    } : _hotkeys$playPauseKey;\n\n    if (fullscreenKey.call(this, event)) {\n      event.preventDefault();\n      event.stopPropagation();\n      var FSToggle = Component.getComponent('FullscreenToggle');\n\n      if (document[this.fsApi_.fullscreenEnabled] !== false) {\n        FSToggle.prototype.handleClick.call(this, event);\n      }\n    } else if (muteKey.call(this, event)) {\n      event.preventDefault();\n      event.stopPropagation();\n      var MuteToggle = Component.getComponent('MuteToggle');\n      MuteToggle.prototype.handleClick.call(this, event);\n    } else if (playPauseKey.call(this, event)) {\n      event.preventDefault();\n      event.stopPropagation();\n      var PlayToggle = Component.getComponent('PlayToggle');\n      PlayToggle.prototype.handleClick.call(this, event);\n    }\n  }\n  /**\n   * Check whether the player can play a given mimetype\n   *\n   * @see https://www.w3.org/TR/2011/WD-html5-20110113/video.html#dom-navigator-canplaytype\n   *\n   * @param {string} type\n   *        The mimetype to check\n   *\n   * @return {string}\n   *         'probably', 'maybe', or '' (empty string)\n   */\n  ;\n\n  _proto.canPlayType = function canPlayType(type) {\n    var can; // Loop through each playback technology in the options order\n\n    for (var i = 0, j = this.options_.techOrder; i < j.length; i++) {\n      var techName = j[i];\n      var tech = Tech.getTech(techName); // Support old behavior of techs being registered as components.\n      // Remove once that deprecated behavior is removed.\n\n      if (!tech) {\n        tech = Component.getComponent(techName);\n      } // Check if the current tech is defined before continuing\n\n\n      if (!tech) {\n        log.error(\"The \\\"\" + techName + \"\\\" tech is undefined. Skipped browser support check for that tech.\");\n        continue;\n      } // Check if the browser supports this technology\n\n\n      if (tech.isSupported()) {\n        can = tech.canPlayType(type);\n\n        if (can) {\n          return can;\n        }\n      }\n    }\n\n    return '';\n  }\n  /**\n   * Select source based on tech-order or source-order\n   * Uses source-order selection if `options.sourceOrder` is truthy. Otherwise,\n   * defaults to tech-order selection\n   *\n   * @param {Array} sources\n   *        The sources for a media asset\n   *\n   * @return {Object|boolean}\n   *         Object of source and tech order or false\n   */\n  ;\n\n  _proto.selectSource = function selectSource(sources) {\n    var _this10 = this; // Get only the techs specified in `techOrder` that exist and are supported by the\n    // current platform\n\n\n    var techs = this.options_.techOrder.map(function (techName) {\n      return [techName, Tech.getTech(techName)];\n    }).filter(function (_ref) {\n      var techName = _ref[0],\n          tech = _ref[1]; // Check if the current tech is defined before continuing\n\n      if (tech) {\n        // Check if the browser supports this technology\n        return tech.isSupported();\n      }\n\n      log.error(\"The \\\"\" + techName + \"\\\" tech is undefined. Skipped browser support check for that tech.\");\n      return false;\n    }); // Iterate over each `innerArray` element once per `outerArray` element and execute\n    // `tester` with both. If `tester` returns a non-falsy value, exit early and return\n    // that value.\n\n    var findFirstPassingTechSourcePair = function findFirstPassingTechSourcePair(outerArray, innerArray, tester) {\n      var found;\n      outerArray.some(function (outerChoice) {\n        return innerArray.some(function (innerChoice) {\n          found = tester(outerChoice, innerChoice);\n\n          if (found) {\n            return true;\n          }\n        });\n      });\n      return found;\n    };\n\n    var foundSourceAndTech;\n\n    var flip = function flip(fn) {\n      return function (a, b) {\n        return fn(b, a);\n      };\n    };\n\n    var finder = function finder(_ref2, source) {\n      var techName = _ref2[0],\n          tech = _ref2[1];\n\n      if (tech.canPlaySource(source, _this10.options_[techName.toLowerCase()])) {\n        return {\n          source: source,\n          tech: techName\n        };\n      }\n    }; // Depending on the truthiness of `options.sourceOrder`, we swap the order of techs and sources\n    // to select from them based on their priority.\n\n\n    if (this.options_.sourceOrder) {\n      // Source-first ordering\n      foundSourceAndTech = findFirstPassingTechSourcePair(sources, techs, flip(finder));\n    } else {\n      // Tech-first ordering\n      foundSourceAndTech = findFirstPassingTechSourcePair(techs, sources, finder);\n    }\n\n    return foundSourceAndTech || false;\n  }\n  /**\n   * Get or set the video source.\n   *\n   * @param {Tech~SourceObject|Tech~SourceObject[]|string} [source]\n   *        A SourceObject, an array of SourceObjects, or a string referencing\n   *        a URL to a media source. It is _highly recommended_ that an object\n   *        or array of objects is used here, so that source selection\n   *        algorithms can take the `type` into account.\n   *\n   *        If not provided, this method acts as a getter.\n   *\n   * @return {string|undefined}\n   *         If the `source` argument is missing, returns the current source\n   *         URL. Otherwise, returns nothing/undefined.\n   */\n  ;\n\n  _proto.src = function src(source) {\n    var _this11 = this; // getter usage\n\n\n    if (typeof source === 'undefined') {\n      return this.cache_.src || '';\n    } // filter out invalid sources and turn our source into\n    // an array of source objects\n\n\n    var sources = filterSource(source); // if a source was passed in then it is invalid because\n    // it was filtered to a zero length Array. So we have to\n    // show an error\n\n    if (!sources.length) {\n      this.setTimeout(function () {\n        this.error({\n          code: 4,\n          message: this.localize(this.options_.notSupportedMessage)\n        });\n      }, 0);\n      return;\n    } // intial sources\n\n\n    this.changingSrc_ = true;\n    this.cache_.sources = sources;\n    this.updateSourceCaches_(sources[0]); // middlewareSource is the source after it has been changed by middleware\n\n    setSource(this, sources[0], function (middlewareSource, mws) {\n      _this11.middleware_ = mws; // since sourceSet is async we have to update the cache again after we select a source since\n      // the source that is selected could be out of order from the cache update above this callback.\n\n      _this11.cache_.sources = sources;\n\n      _this11.updateSourceCaches_(middlewareSource);\n\n      var err = _this11.src_(middlewareSource);\n\n      if (err) {\n        if (sources.length > 1) {\n          return _this11.src(sources.slice(1));\n        }\n\n        _this11.changingSrc_ = false; // We need to wrap this in a timeout to give folks a chance to add error event handlers\n\n        _this11.setTimeout(function () {\n          this.error({\n            code: 4,\n            message: this.localize(this.options_.notSupportedMessage)\n          });\n        }, 0); // we could not find an appropriate tech, but let's still notify the delegate that this is it\n        // this needs a better comment about why this is needed\n\n\n        _this11.triggerReady();\n\n        return;\n      }\n\n      setTech(mws, _this11.tech_);\n    });\n  }\n  /**\n   * Set the source object on the tech, returns a boolean that indicates whether\n   * there is a tech that can play the source or not\n   *\n   * @param {Tech~SourceObject} source\n   *        The source object to set on the Tech\n   *\n   * @return {boolean}\n   *         - True if there is no Tech to playback this source\n   *         - False otherwise\n   *\n   * @private\n   */\n  ;\n\n  _proto.src_ = function src_(source) {\n    var _this12 = this;\n\n    var sourceTech = this.selectSource([source]);\n\n    if (!sourceTech) {\n      return true;\n    }\n\n    if (!titleCaseEquals(sourceTech.tech, this.techName_)) {\n      this.changingSrc_ = true; // load this technology with the chosen source\n\n      this.loadTech_(sourceTech.tech, sourceTech.source);\n      this.tech_.ready(function () {\n        _this12.changingSrc_ = false;\n      });\n      return false;\n    } // wait until the tech is ready to set the source\n    // and set it synchronously if possible (#2326)\n\n\n    this.ready(function () {\n      // The setSource tech method was added with source handlers\n      // so older techs won't support it\n      // We need to check the direct prototype for the case where subclasses\n      // of the tech do not support source handlers\n      if (this.tech_.constructor.prototype.hasOwnProperty('setSource')) {\n        this.techCall_('setSource', source);\n      } else {\n        this.techCall_('src', source.src);\n      }\n\n      this.changingSrc_ = false;\n    }, true);\n    return false;\n  }\n  /**\n   * Begin loading the src data.\n   */\n  ;\n\n  _proto.load = function load() {\n    this.techCall_('load');\n  }\n  /**\n   * Reset the player. Loads the first tech in the techOrder,\n   * removes all the text tracks in the existing `tech`,\n   * and calls `reset` on the `tech`.\n   */\n  ;\n\n  _proto.reset = function reset() {\n    var _this13 = this;\n\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (this.paused() || !PromiseClass) {\n      this.doReset_();\n    } else {\n      var playPromise = this.play();\n      silencePromise(playPromise.then(function () {\n        return _this13.doReset_();\n      }));\n    }\n  };\n\n  _proto.doReset_ = function doReset_() {\n    if (this.tech_) {\n      this.tech_.clearTracks('text');\n    }\n\n    this.resetCache_();\n    this.poster('');\n    this.loadTech_(this.options_.techOrder[0], null);\n    this.techCall_('reset');\n    this.resetControlBarUI_();\n\n    if (isEvented(this)) {\n      this.trigger('playerreset');\n    }\n  }\n  /**\n   * Reset Control Bar's UI by calling sub-methods that reset\n   * all of Control Bar's components\n   */\n  ;\n\n  _proto.resetControlBarUI_ = function resetControlBarUI_() {\n    this.resetProgressBar_();\n    this.resetPlaybackRate_();\n    this.resetVolumeBar_();\n  }\n  /**\n   * Reset tech's progress so progress bar is reset in the UI\n   */\n  ;\n\n  _proto.resetProgressBar_ = function resetProgressBar_() {\n    this.currentTime(0);\n    var _this$controlBar = this.controlBar,\n        durationDisplay = _this$controlBar.durationDisplay,\n        remainingTimeDisplay = _this$controlBar.remainingTimeDisplay;\n\n    if (durationDisplay) {\n      durationDisplay.updateContent();\n    }\n\n    if (remainingTimeDisplay) {\n      remainingTimeDisplay.updateContent();\n    }\n  }\n  /**\n   * Reset Playback ratio\n   */\n  ;\n\n  _proto.resetPlaybackRate_ = function resetPlaybackRate_() {\n    this.playbackRate(this.defaultPlaybackRate());\n    this.handleTechRateChange_();\n  }\n  /**\n   * Reset Volume bar\n   */\n  ;\n\n  _proto.resetVolumeBar_ = function resetVolumeBar_() {\n    this.volume(1.0);\n    this.trigger('volumechange');\n  }\n  /**\n   * Returns all of the current source objects.\n   *\n   * @return {Tech~SourceObject[]}\n   *         The current source objects\n   */\n  ;\n\n  _proto.currentSources = function currentSources() {\n    var source = this.currentSource();\n    var sources = []; // assume `{}` or `{ src }`\n\n    if (Object.keys(source).length !== 0) {\n      sources.push(source);\n    }\n\n    return this.cache_.sources || sources;\n  }\n  /**\n   * Returns the current source object.\n   *\n   * @return {Tech~SourceObject}\n   *         The current source object\n   */\n  ;\n\n  _proto.currentSource = function currentSource() {\n    return this.cache_.source || {};\n  }\n  /**\n   * Returns the fully qualified URL of the current source value e.g. http://mysite.com/video.mp4\n   * Can be used in conjunction with `currentType` to assist in rebuilding the current source object.\n   *\n   * @return {string}\n   *         The current source\n   */\n  ;\n\n  _proto.currentSrc = function currentSrc() {\n    return this.currentSource() && this.currentSource().src || '';\n  }\n  /**\n   * Get the current source type e.g. video/mp4\n   * This can allow you rebuild the current source object so that you could load the same\n   * source and tech later\n   *\n   * @return {string}\n   *         The source MIME type\n   */\n  ;\n\n  _proto.currentType = function currentType() {\n    return this.currentSource() && this.currentSource().type || '';\n  }\n  /**\n   * Get or set the preload attribute\n   *\n   * @param {boolean} [value]\n   *        - true means that we should preload\n   *        - false means that we should not preload\n   *\n   * @return {string}\n   *         The preload attribute value when getting\n   */\n  ;\n\n  _proto.preload = function preload(value) {\n    if (value !== undefined) {\n      this.techCall_('setPreload', value);\n      this.options_.preload = value;\n      return;\n    }\n\n    return this.techGet_('preload');\n  }\n  /**\n   * Get or set the autoplay option. When this is a boolean it will\n   * modify the attribute on the tech. When this is a string the attribute on\n   * the tech will be removed and `Player` will handle autoplay on loadstarts.\n   *\n   * @param {boolean|string} [value]\n   *        - true: autoplay using the browser behavior\n   *        - false: do not autoplay\n   *        - 'play': call play() on every loadstart\n   *        - 'muted': call muted() then play() on every loadstart\n   *        - 'any': call play() on every loadstart. if that fails call muted() then play().\n   *        - *: values other than those listed here will be set `autoplay` to true\n   *\n   * @return {boolean|string}\n   *         The current value of autoplay when getting\n   */\n  ;\n\n  _proto.autoplay = function autoplay(value) {\n    // getter usage\n    if (value === undefined) {\n      return this.options_.autoplay || false;\n    }\n\n    var techAutoplay; // if the value is a valid string set it to that\n\n    if (typeof value === 'string' && /(any|play|muted)/.test(value)) {\n      this.options_.autoplay = value;\n      this.manualAutoplay_(value);\n      techAutoplay = false; // any falsy value sets autoplay to false in the browser,\n      // lets do the same\n    } else if (!value) {\n      this.options_.autoplay = false; // any other value (ie truthy) sets autoplay to true\n    } else {\n      this.options_.autoplay = true;\n    }\n\n    techAutoplay = typeof techAutoplay === 'undefined' ? this.options_.autoplay : techAutoplay; // if we don't have a tech then we do not queue up\n    // a setAutoplay call on tech ready. We do this because the\n    // autoplay option will be passed in the constructor and we\n    // do not need to set it twice\n\n    if (this.tech_) {\n      this.techCall_('setAutoplay', techAutoplay);\n    }\n  }\n  /**\n   * Set or unset the playsinline attribute.\n   * Playsinline tells the browser that non-fullscreen playback is preferred.\n   *\n   * @param {boolean} [value]\n   *        - true means that we should try to play inline by default\n   *        - false means that we should use the browser's default playback mode,\n   *          which in most cases is inline. iOS Safari is a notable exception\n   *          and plays fullscreen by default.\n   *\n   * @return {string|Player}\n   *         - the current value of playsinline\n   *         - the player when setting\n   *\n   * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n   */\n  ;\n\n  _proto.playsinline = function playsinline(value) {\n    if (value !== undefined) {\n      this.techCall_('setPlaysinline', value);\n      this.options_.playsinline = value;\n      return this;\n    }\n\n    return this.techGet_('playsinline');\n  }\n  /**\n   * Get or set the loop attribute on the video element.\n   *\n   * @param {boolean} [value]\n   *        - true means that we should loop the video\n   *        - false means that we should not loop the video\n   *\n   * @return {boolean}\n   *         The current value of loop when getting\n   */\n  ;\n\n  _proto.loop = function loop(value) {\n    if (value !== undefined) {\n      this.techCall_('setLoop', value);\n      this.options_.loop = value;\n      return;\n    }\n\n    return this.techGet_('loop');\n  }\n  /**\n   * Get or set the poster image source url\n   *\n   * @fires Player#posterchange\n   *\n   * @param {string} [src]\n   *        Poster image source URL\n   *\n   * @return {string}\n   *         The current value of poster when getting\n   */\n  ;\n\n  _proto.poster = function poster(src) {\n    if (src === undefined) {\n      return this.poster_;\n    } // The correct way to remove a poster is to set as an empty string\n    // other falsey values will throw errors\n\n\n    if (!src) {\n      src = '';\n    }\n\n    if (src === this.poster_) {\n      return;\n    } // update the internal poster variable\n\n\n    this.poster_ = src; // update the tech's poster\n\n    this.techCall_('setPoster', src);\n    this.isPosterFromTech_ = false; // alert components that the poster has been set\n\n    /**\n     * This event fires when the poster image is changed on the player.\n     *\n     * @event Player#posterchange\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('posterchange');\n  }\n  /**\n   * Some techs (e.g. YouTube) can provide a poster source in an\n   * asynchronous way. We want the poster component to use this\n   * poster source so that it covers up the tech's controls.\n   * (YouTube's play button). However we only want to use this\n   * source if the player user hasn't set a poster through\n   * the normal APIs.\n   *\n   * @fires Player#posterchange\n   * @listens Tech#posterchange\n   * @private\n   */\n  ;\n\n  _proto.handleTechPosterChange_ = function handleTechPosterChange_() {\n    if ((!this.poster_ || this.options_.techCanOverridePoster) && this.tech_ && this.tech_.poster) {\n      var newPoster = this.tech_.poster() || '';\n\n      if (newPoster !== this.poster_) {\n        this.poster_ = newPoster;\n        this.isPosterFromTech_ = true; // Let components know the poster has changed\n\n        this.trigger('posterchange');\n      }\n    }\n  }\n  /**\n   * Get or set whether or not the controls are showing.\n   *\n   * @fires Player#controlsenabled\n   *\n   * @param {boolean} [bool]\n   *        - true to turn controls on\n   *        - false to turn controls off\n   *\n   * @return {boolean}\n   *         The current value of controls when getting\n   */\n  ;\n\n  _proto.controls = function controls(bool) {\n    if (bool === undefined) {\n      return !!this.controls_;\n    }\n\n    bool = !!bool; // Don't trigger a change event unless it actually changed\n\n    if (this.controls_ === bool) {\n      return;\n    }\n\n    this.controls_ = bool;\n\n    if (this.usingNativeControls()) {\n      this.techCall_('setControls', bool);\n    }\n\n    if (this.controls_) {\n      this.removeClass('vjs-controls-disabled');\n      this.addClass('vjs-controls-enabled');\n      /**\n       * @event Player#controlsenabled\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('controlsenabled');\n\n      if (!this.usingNativeControls()) {\n        this.addTechControlsListeners_();\n      }\n    } else {\n      this.removeClass('vjs-controls-enabled');\n      this.addClass('vjs-controls-disabled');\n      /**\n       * @event Player#controlsdisabled\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('controlsdisabled');\n\n      if (!this.usingNativeControls()) {\n        this.removeTechControlsListeners_();\n      }\n    }\n  }\n  /**\n   * Toggle native controls on/off. Native controls are the controls built into\n   * devices (e.g. default iPhone controls), Flash, or other techs\n   * (e.g. Vimeo Controls)\n   * **This should only be set by the current tech, because only the tech knows\n   * if it can support native controls**\n   *\n   * @fires Player#usingnativecontrols\n   * @fires Player#usingcustomcontrols\n   *\n   * @param {boolean} [bool]\n   *        - true to turn native controls on\n   *        - false to turn native controls off\n   *\n   * @return {boolean}\n   *         The current value of native controls when getting\n   */\n  ;\n\n  _proto.usingNativeControls = function usingNativeControls(bool) {\n    if (bool === undefined) {\n      return !!this.usingNativeControls_;\n    }\n\n    bool = !!bool; // Don't trigger a change event unless it actually changed\n\n    if (this.usingNativeControls_ === bool) {\n      return;\n    }\n\n    this.usingNativeControls_ = bool;\n\n    if (this.usingNativeControls_) {\n      this.addClass('vjs-using-native-controls');\n      /**\n       * player is using the native device controls\n       *\n       * @event Player#usingnativecontrols\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('usingnativecontrols');\n    } else {\n      this.removeClass('vjs-using-native-controls');\n      /**\n       * player is using the custom HTML controls\n       *\n       * @event Player#usingcustomcontrols\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('usingcustomcontrols');\n    }\n  }\n  /**\n   * Set or get the current MediaError\n   *\n   * @fires Player#error\n   *\n   * @param  {MediaError|string|number} [err]\n   *         A MediaError or a string/number to be turned\n   *         into a MediaError\n   *\n   * @return {MediaError|null}\n   *         The current MediaError when getting (or null)\n   */\n  ;\n\n  _proto.error = function error(err) {\n    if (err === undefined) {\n      return this.error_ || null;\n    } // Suppress the first error message for no compatible source until\n    // user interaction\n\n\n    if (this.options_.suppressNotSupportedError && err && err.message && err.message === this.localize(this.options_.notSupportedMessage)) {\n      var triggerSuppressedError = function triggerSuppressedError() {\n        this.error(err);\n      };\n\n      this.options_.suppressNotSupportedError = false;\n      this.any(['click', 'touchstart'], triggerSuppressedError);\n      this.one('loadstart', function () {\n        this.off(['click', 'touchstart'], triggerSuppressedError);\n      });\n      return;\n    } // restoring to default\n\n\n    if (err === null) {\n      this.error_ = err;\n      this.removeClass('vjs-error');\n\n      if (this.errorDisplay) {\n        this.errorDisplay.close();\n      }\n\n      return;\n    }\n\n    this.error_ = new MediaError(err); // add the vjs-error classname to the player\n\n    this.addClass('vjs-error'); // log the name of the error type and any message\n    // IE11 logs \"[object object]\" and required you to expand message to see error object\n\n    log.error(\"(CODE:\" + this.error_.code + \" \" + MediaError.errorTypes[this.error_.code] + \")\", this.error_.message, this.error_);\n    /**\n     * @event Player#error\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('error');\n    return;\n  }\n  /**\n   * Report user activity\n   *\n   * @param {Object} event\n   *        Event object\n   */\n  ;\n\n  _proto.reportUserActivity = function reportUserActivity(event) {\n    this.userActivity_ = true;\n  }\n  /**\n   * Get/set if user is active\n   *\n   * @fires Player#useractive\n   * @fires Player#userinactive\n   *\n   * @param {boolean} [bool]\n   *        - true if the user is active\n   *        - false if the user is inactive\n   *\n   * @return {boolean}\n   *         The current value of userActive when getting\n   */\n  ;\n\n  _proto.userActive = function userActive(bool) {\n    if (bool === undefined) {\n      return this.userActive_;\n    }\n\n    bool = !!bool;\n\n    if (bool === this.userActive_) {\n      return;\n    }\n\n    this.userActive_ = bool;\n\n    if (this.userActive_) {\n      this.userActivity_ = true;\n      this.removeClass('vjs-user-inactive');\n      this.addClass('vjs-user-active');\n      /**\n       * @event Player#useractive\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('useractive');\n      return;\n    } // Chrome/Safari/IE have bugs where when you change the cursor it can\n    // trigger a mousemove event. This causes an issue when you're hiding\n    // the cursor when the user is inactive, and a mousemove signals user\n    // activity. Making it impossible to go into inactive mode. Specifically\n    // this happens in fullscreen when we really need to hide the cursor.\n    //\n    // When this gets resolved in ALL browsers it can be removed\n    // https://code.google.com/p/chromium/issues/detail?id=103041\n\n\n    if (this.tech_) {\n      this.tech_.one('mousemove', function (e) {\n        e.stopPropagation();\n        e.preventDefault();\n      });\n    }\n\n    this.userActivity_ = false;\n    this.removeClass('vjs-user-active');\n    this.addClass('vjs-user-inactive');\n    /**\n     * @event Player#userinactive\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('userinactive');\n  }\n  /**\n   * Listen for user activity based on timeout value\n   *\n   * @private\n   */\n  ;\n\n  _proto.listenForUserActivity_ = function listenForUserActivity_() {\n    var mouseInProgress;\n    var lastMoveX;\n    var lastMoveY;\n    var handleActivity = bind(this, this.reportUserActivity);\n\n    var handleMouseMove = function handleMouseMove(e) {\n      // #1068 - Prevent mousemove spamming\n      // Chrome Bug: https://code.google.com/p/chromium/issues/detail?id=366970\n      if (e.screenX !== lastMoveX || e.screenY !== lastMoveY) {\n        lastMoveX = e.screenX;\n        lastMoveY = e.screenY;\n        handleActivity();\n      }\n    };\n\n    var handleMouseDown = function handleMouseDown() {\n      handleActivity(); // For as long as the they are touching the device or have their mouse down,\n      // we consider them active even if they're not moving their finger or mouse.\n      // So we want to continue to update that they are active\n\n      this.clearInterval(mouseInProgress); // Setting userActivity=true now and setting the interval to the same time\n      // as the activityCheck interval (250) should ensure we never miss the\n      // next activityCheck\n\n      mouseInProgress = this.setInterval(handleActivity, 250);\n    };\n\n    var handleMouseUp = function handleMouseUp(event) {\n      handleActivity(); // Stop the interval that maintains activity if the mouse/touch is down\n\n      this.clearInterval(mouseInProgress);\n    }; // Any mouse movement will be considered user activity\n\n\n    this.on('mousedown', handleMouseDown);\n    this.on('mousemove', handleMouseMove);\n    this.on('mouseup', handleMouseUp);\n    var controlBar = this.getChild('controlBar'); // Fixes bug on Android & iOS where when tapping progressBar (when control bar is displayed)\n    // controlBar would no longer be hidden by default timeout.\n\n    if (controlBar && !IS_IOS && !IS_ANDROID) {\n      controlBar.on('mouseenter', function (event) {\n        this.player().cache_.inactivityTimeout = this.player().options_.inactivityTimeout;\n        this.player().options_.inactivityTimeout = 0;\n      });\n      controlBar.on('mouseleave', function (event) {\n        this.player().options_.inactivityTimeout = this.player().cache_.inactivityTimeout;\n      });\n    } // Listen for keyboard navigation\n    // Shouldn't need to use inProgress interval because of key repeat\n\n\n    this.on('keydown', handleActivity);\n    this.on('keyup', handleActivity); // Run an interval every 250 milliseconds instead of stuffing everything into\n    // the mousemove/touchmove function itself, to prevent performance degradation.\n    // `this.reportUserActivity` simply sets this.userActivity_ to true, which\n    // then gets picked up by this loop\n    // http://ejohn.org/blog/learning-from-twitter/\n\n    var inactivityTimeout;\n    this.setInterval(function () {\n      // Check to see if mouse/touch activity has happened\n      if (!this.userActivity_) {\n        return;\n      } // Reset the activity tracker\n\n\n      this.userActivity_ = false; // If the user state was inactive, set the state to active\n\n      this.userActive(true); // Clear any existing inactivity timeout to start the timer over\n\n      this.clearTimeout(inactivityTimeout);\n      var timeout = this.options_.inactivityTimeout;\n\n      if (timeout <= 0) {\n        return;\n      } // In <timeout> milliseconds, if no more activity has occurred the\n      // user will be considered inactive\n\n\n      inactivityTimeout = this.setTimeout(function () {\n        // Protect against the case where the inactivityTimeout can trigger just\n        // before the next user activity is picked up by the activity check loop\n        // causing a flicker\n        if (!this.userActivity_) {\n          this.userActive(false);\n        }\n      }, timeout);\n    }, 250);\n  }\n  /**\n   * Gets or sets the current playback rate. A playback rate of\n   * 1.0 represents normal speed and 0.5 would indicate half-speed\n   * playback, for instance.\n   *\n   * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-playbackrate\n   *\n   * @param {number} [rate]\n   *       New playback rate to set.\n   *\n   * @return {number}\n   *         The current playback rate when getting or 1.0\n   */\n  ;\n\n  _proto.playbackRate = function playbackRate(rate) {\n    if (rate !== undefined) {\n      // NOTE: this.cache_.lastPlaybackRate is set from the tech handler\n      // that is registered above\n      this.techCall_('setPlaybackRate', rate);\n      return;\n    }\n\n    if (this.tech_ && this.tech_.featuresPlaybackRate) {\n      return this.cache_.lastPlaybackRate || this.techGet_('playbackRate');\n    }\n\n    return 1.0;\n  }\n  /**\n   * Gets or sets the current default playback rate. A default playback rate of\n   * 1.0 represents normal speed and 0.5 would indicate half-speed playback, for instance.\n   * defaultPlaybackRate will only represent what the initial playbackRate of a video was, not\n   * not the current playbackRate.\n   *\n   * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-defaultplaybackrate\n   *\n   * @param {number} [rate]\n   *       New default playback rate to set.\n   *\n   * @return {number|Player}\n   *         - The default playback rate when getting or 1.0\n   *         - the player when setting\n   */\n  ;\n\n  _proto.defaultPlaybackRate = function defaultPlaybackRate(rate) {\n    if (rate !== undefined) {\n      return this.techCall_('setDefaultPlaybackRate', rate);\n    }\n\n    if (this.tech_ && this.tech_.featuresPlaybackRate) {\n      return this.techGet_('defaultPlaybackRate');\n    }\n\n    return 1.0;\n  }\n  /**\n   * Gets or sets the audio flag\n   *\n   * @param {boolean} bool\n   *        - true signals that this is an audio player\n   *        - false signals that this is not an audio player\n   *\n   * @return {boolean}\n   *         The current value of isAudio when getting\n   */\n  ;\n\n  _proto.isAudio = function isAudio(bool) {\n    if (bool !== undefined) {\n      this.isAudio_ = !!bool;\n      return;\n    }\n\n    return !!this.isAudio_;\n  }\n  /**\n   * A helper method for adding a {@link TextTrack} to our\n   * {@link TextTrackList}.\n   *\n   * In addition to the W3C settings we allow adding additional info through options.\n   *\n   * @see http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-addtexttrack\n   *\n   * @param {string} [kind]\n   *        the kind of TextTrack you are adding\n   *\n   * @param {string} [label]\n   *        the label to give the TextTrack label\n   *\n   * @param {string} [language]\n   *        the language to set on the TextTrack\n   *\n   * @return {TextTrack|undefined}\n   *         the TextTrack that was added or undefined\n   *         if there is no tech\n   */\n  ;\n\n  _proto.addTextTrack = function addTextTrack(kind, label, language) {\n    if (this.tech_) {\n      return this.tech_.addTextTrack(kind, label, language);\n    }\n  }\n  /**\n   * Create a remote {@link TextTrack} and an {@link HTMLTrackElement}. It will\n   * automatically removed from the video element whenever the source changes, unless\n   * manualCleanup is set to false.\n   *\n   * @param {Object} options\n   *        Options to pass to {@link HTMLTrackElement} during creation. See\n   *        {@link HTMLTrackElement} for object properties that you should use.\n   *\n   * @param {boolean} [manualCleanup=true] if set to false, the TextTrack will be\n   *\n   * @return {HtmlTrackElement}\n   *         the HTMLTrackElement that was created and added\n   *         to the HtmlTrackElementList and the remote\n   *         TextTrackList\n   *\n   * @deprecated The default value of the \"manualCleanup\" parameter will default\n   *             to \"false\" in upcoming versions of Video.js\n   */\n  ;\n\n  _proto.addRemoteTextTrack = function addRemoteTextTrack(options, manualCleanup) {\n    if (this.tech_) {\n      return this.tech_.addRemoteTextTrack(options, manualCleanup);\n    }\n  }\n  /**\n   * Remove a remote {@link TextTrack} from the respective\n   * {@link TextTrackList} and {@link HtmlTrackElementList}.\n   *\n   * @param {Object} track\n   *        Remote {@link TextTrack} to remove\n   *\n   * @return {undefined}\n   *         does not return anything\n   */\n  ;\n\n  _proto.removeRemoteTextTrack = function removeRemoteTextTrack(obj) {\n    if (obj === void 0) {\n      obj = {};\n    }\n\n    var _obj = obj,\n        track = _obj.track;\n\n    if (!track) {\n      track = obj;\n    } // destructure the input into an object with a track argument, defaulting to arguments[0]\n    // default the whole argument to an empty object if nothing was passed in\n\n\n    if (this.tech_) {\n      return this.tech_.removeRemoteTextTrack(track);\n    }\n  }\n  /**\n   * Gets available media playback quality metrics as specified by the W3C's Media\n   * Playback Quality API.\n   *\n   * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n   *\n   * @return {Object|undefined}\n   *         An object with supported media playback quality metrics or undefined if there\n   *         is no tech or the tech does not support it.\n   */\n  ;\n\n  _proto.getVideoPlaybackQuality = function getVideoPlaybackQuality() {\n    return this.techGet_('getVideoPlaybackQuality');\n  }\n  /**\n   * Get video width\n   *\n   * @return {number}\n   *         current video width\n   */\n  ;\n\n  _proto.videoWidth = function videoWidth() {\n    return this.tech_ && this.tech_.videoWidth && this.tech_.videoWidth() || 0;\n  }\n  /**\n   * Get video height\n   *\n   * @return {number}\n   *         current video height\n   */\n  ;\n\n  _proto.videoHeight = function videoHeight() {\n    return this.tech_ && this.tech_.videoHeight && this.tech_.videoHeight() || 0;\n  }\n  /**\n   * The player's language code\n   * NOTE: The language should be set in the player options if you want the\n   * the controls to be built with a specific language. Changing the language\n   * later will not update controls text.\n   *\n   * @param {string} [code]\n   *        the language code to set the player to\n   *\n   * @return {string}\n   *         The current language code when getting\n   */\n  ;\n\n  _proto.language = function language(code) {\n    if (code === undefined) {\n      return this.language_;\n    }\n\n    this.language_ = String(code).toLowerCase();\n  }\n  /**\n   * Get the player's language dictionary\n   * Merge every time, because a newly added plugin might call videojs.addLanguage() at any time\n   * Languages specified directly in the player options have precedence\n   *\n   * @return {Array}\n   *         An array of of supported languages\n   */\n  ;\n\n  _proto.languages = function languages() {\n    return mergeOptions(Player.prototype.options_.languages, this.languages_);\n  }\n  /**\n   * returns a JavaScript object reperesenting the current track\n   * information. **DOES not return it as JSON**\n   *\n   * @return {Object}\n   *         Object representing the current of track info\n   */\n  ;\n\n  _proto.toJSON = function toJSON() {\n    var options = mergeOptions(this.options_);\n    var tracks = options.tracks;\n    options.tracks = [];\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i]; // deep merge tracks and null out player so no circular references\n\n      track = mergeOptions(track);\n      track.player = undefined;\n      options.tracks[i] = track;\n    }\n\n    return options;\n  }\n  /**\n   * Creates a simple modal dialog (an instance of the {@link ModalDialog}\n   * component) that immediately overlays the player with arbitrary\n   * content and removes itself when closed.\n   *\n   * @param {string|Function|Element|Array|null} content\n   *        Same as {@link ModalDialog#content}'s param of the same name.\n   *        The most straight-forward usage is to provide a string or DOM\n   *        element.\n   *\n   * @param {Object} [options]\n   *        Extra options which will be passed on to the {@link ModalDialog}.\n   *\n   * @return {ModalDialog}\n   *         the {@link ModalDialog} that was created\n   */\n  ;\n\n  _proto.createModal = function createModal(content, options) {\n    var _this14 = this;\n\n    options = options || {};\n    options.content = content || '';\n    var modal = new ModalDialog(this, options);\n    this.addChild(modal);\n    modal.on('dispose', function () {\n      _this14.removeChild(modal);\n    });\n    modal.open();\n    return modal;\n  }\n  /**\n   * Change breakpoint classes when the player resizes.\n   *\n   * @private\n   */\n  ;\n\n  _proto.updateCurrentBreakpoint_ = function updateCurrentBreakpoint_() {\n    if (!this.responsive()) {\n      return;\n    }\n\n    var currentBreakpoint = this.currentBreakpoint();\n    var currentWidth = this.currentWidth();\n\n    for (var i = 0; i < BREAKPOINT_ORDER.length; i++) {\n      var candidateBreakpoint = BREAKPOINT_ORDER[i];\n      var maxWidth = this.breakpoints_[candidateBreakpoint];\n\n      if (currentWidth <= maxWidth) {\n        // The current breakpoint did not change, nothing to do.\n        if (currentBreakpoint === candidateBreakpoint) {\n          return;\n        } // Only remove a class if there is a current breakpoint.\n\n\n        if (currentBreakpoint) {\n          this.removeClass(BREAKPOINT_CLASSES[currentBreakpoint]);\n        }\n\n        this.addClass(BREAKPOINT_CLASSES[candidateBreakpoint]);\n        this.breakpoint_ = candidateBreakpoint;\n        break;\n      }\n    }\n  }\n  /**\n   * Removes the current breakpoint.\n   *\n   * @private\n   */\n  ;\n\n  _proto.removeCurrentBreakpoint_ = function removeCurrentBreakpoint_() {\n    var className = this.currentBreakpointClass();\n    this.breakpoint_ = '';\n\n    if (className) {\n      this.removeClass(className);\n    }\n  }\n  /**\n   * Get or set breakpoints on the player.\n   *\n   * Calling this method with an object or `true` will remove any previous\n   * custom breakpoints and start from the defaults again.\n   *\n   * @param  {Object|boolean} [breakpoints]\n   *         If an object is given, it can be used to provide custom\n   *         breakpoints. If `true` is given, will set default breakpoints.\n   *         If this argument is not given, will simply return the current\n   *         breakpoints.\n   *\n   * @param  {number} [breakpoints.tiny]\n   *         The maximum width for the \"vjs-layout-tiny\" class.\n   *\n   * @param  {number} [breakpoints.xsmall]\n   *         The maximum width for the \"vjs-layout-x-small\" class.\n   *\n   * @param  {number} [breakpoints.small]\n   *         The maximum width for the \"vjs-layout-small\" class.\n   *\n   * @param  {number} [breakpoints.medium]\n   *         The maximum width for the \"vjs-layout-medium\" class.\n   *\n   * @param  {number} [breakpoints.large]\n   *         The maximum width for the \"vjs-layout-large\" class.\n   *\n   * @param  {number} [breakpoints.xlarge]\n   *         The maximum width for the \"vjs-layout-x-large\" class.\n   *\n   * @param  {number} [breakpoints.huge]\n   *         The maximum width for the \"vjs-layout-huge\" class.\n   *\n   * @return {Object}\n   *         An object mapping breakpoint names to maximum width values.\n   */\n  ;\n\n  _proto.breakpoints = function breakpoints(_breakpoints) {\n    // Used as a getter.\n    if (_breakpoints === undefined) {\n      return assign(this.breakpoints_);\n    }\n\n    this.breakpoint_ = '';\n    this.breakpoints_ = assign({}, DEFAULT_BREAKPOINTS, _breakpoints); // When breakpoint definitions change, we need to update the currently\n    // selected breakpoint.\n\n    this.updateCurrentBreakpoint_(); // Clone the breakpoints before returning.\n\n    return assign(this.breakpoints_);\n  }\n  /**\n   * Get or set a flag indicating whether or not this player should adjust\n   * its UI based on its dimensions.\n   *\n   * @param  {boolean} value\n   *         Should be `true` if the player should adjust its UI based on its\n   *         dimensions; otherwise, should be `false`.\n   *\n   * @return {boolean}\n   *         Will be `true` if this player should adjust its UI based on its\n   *         dimensions; otherwise, will be `false`.\n   */\n  ;\n\n  _proto.responsive = function responsive(value) {\n    // Used as a getter.\n    if (value === undefined) {\n      return this.responsive_;\n    }\n\n    value = Boolean(value);\n    var current = this.responsive_; // Nothing changed.\n\n    if (value === current) {\n      return;\n    } // The value actually changed, set it.\n\n\n    this.responsive_ = value; // Start listening for breakpoints and set the initial breakpoint if the\n    // player is now responsive.\n\n    if (value) {\n      this.on('playerresize', this.updateCurrentBreakpoint_);\n      this.updateCurrentBreakpoint_(); // Stop listening for breakpoints if the player is no longer responsive.\n    } else {\n      this.off('playerresize', this.updateCurrentBreakpoint_);\n      this.removeCurrentBreakpoint_();\n    }\n\n    return value;\n  }\n  /**\n   * Get current breakpoint name, if any.\n   *\n   * @return {string}\n   *         If there is currently a breakpoint set, returns a the key from the\n   *         breakpoints object matching it. Otherwise, returns an empty string.\n   */\n  ;\n\n  _proto.currentBreakpoint = function currentBreakpoint() {\n    return this.breakpoint_;\n  }\n  /**\n   * Get the current breakpoint class name.\n   *\n   * @return {string}\n   *         The matching class name (e.g. `\"vjs-layout-tiny\"` or\n   *         `\"vjs-layout-large\"`) for the current breakpoint. Empty string if\n   *         there is no current breakpoint.\n   */\n  ;\n\n  _proto.currentBreakpointClass = function currentBreakpointClass() {\n    return BREAKPOINT_CLASSES[this.breakpoint_] || '';\n  }\n  /**\n   * An object that describes a single piece of media.\n   *\n   * Properties that are not part of this type description will be retained; so,\n   * this can be viewed as a generic metadata storage mechanism as well.\n   *\n   * @see      {@link https://wicg.github.io/mediasession/#the-mediametadata-interface}\n   * @typedef  {Object} Player~MediaObject\n   *\n   * @property {string} [album]\n   *           Unused, except if this object is passed to the `MediaSession`\n   *           API.\n   *\n   * @property {string} [artist]\n   *           Unused, except if this object is passed to the `MediaSession`\n   *           API.\n   *\n   * @property {Object[]} [artwork]\n   *           Unused, except if this object is passed to the `MediaSession`\n   *           API. If not specified, will be populated via the `poster`, if\n   *           available.\n   *\n   * @property {string} [poster]\n   *           URL to an image that will display before playback.\n   *\n   * @property {Tech~SourceObject|Tech~SourceObject[]|string} [src]\n   *           A single source object, an array of source objects, or a string\n   *           referencing a URL to a media source. It is _highly recommended_\n   *           that an object or array of objects is used here, so that source\n   *           selection algorithms can take the `type` into account.\n   *\n   * @property {string} [title]\n   *           Unused, except if this object is passed to the `MediaSession`\n   *           API.\n   *\n   * @property {Object[]} [textTracks]\n   *           An array of objects to be used to create text tracks, following\n   *           the {@link https://www.w3.org/TR/html50/embedded-content-0.html#the-track-element|native track element format}.\n   *           For ease of removal, these will be created as \"remote\" text\n   *           tracks and set to automatically clean up on source changes.\n   *\n   *           These objects may have properties like `src`, `kind`, `label`,\n   *           and `language`, see {@link Tech#createRemoteTextTrack}.\n   */\n\n  /**\n   * Populate the player using a {@link Player~MediaObject|MediaObject}.\n   *\n   * @param  {Player~MediaObject} media\n   *         A media object.\n   *\n   * @param  {Function} ready\n   *         A callback to be called when the player is ready.\n   */\n  ;\n\n  _proto.loadMedia = function loadMedia(media, ready) {\n    var _this15 = this;\n\n    if (!media || typeof media !== 'object') {\n      return;\n    }\n\n    this.reset(); // Clone the media object so it cannot be mutated from outside.\n\n    this.cache_.media = mergeOptions(media);\n    var _this$cache_$media = this.cache_.media,\n        artwork = _this$cache_$media.artwork,\n        poster = _this$cache_$media.poster,\n        src = _this$cache_$media.src,\n        textTracks = _this$cache_$media.textTracks; // If `artwork` is not given, create it using `poster`.\n\n    if (!artwork && poster) {\n      this.cache_.media.artwork = [{\n        src: poster,\n        type: getMimetype(poster)\n      }];\n    }\n\n    if (src) {\n      this.src(src);\n    }\n\n    if (poster) {\n      this.poster(poster);\n    }\n\n    if (Array.isArray(textTracks)) {\n      textTracks.forEach(function (tt) {\n        return _this15.addRemoteTextTrack(tt, false);\n      });\n    }\n\n    this.ready(ready);\n  }\n  /**\n   * Get a clone of the current {@link Player~MediaObject} for this player.\n   *\n   * If the `loadMedia` method has not been used, will attempt to return a\n   * {@link Player~MediaObject} based on the current state of the player.\n   *\n   * @return {Player~MediaObject}\n   */\n  ;\n\n  _proto.getMedia = function getMedia() {\n    if (!this.cache_.media) {\n      var poster = this.poster();\n      var src = this.currentSources();\n      var textTracks = Array.prototype.map.call(this.remoteTextTracks(), function (tt) {\n        return {\n          kind: tt.kind,\n          label: tt.label,\n          language: tt.language,\n          src: tt.src\n        };\n      });\n      var media = {\n        src: src,\n        textTracks: textTracks\n      };\n\n      if (poster) {\n        media.poster = poster;\n        media.artwork = [{\n          src: media.poster,\n          type: getMimetype(media.poster)\n        }];\n      }\n\n      return media;\n    }\n\n    return mergeOptions(this.cache_.media);\n  }\n  /**\n   * Gets tag settings\n   *\n   * @param {Element} tag\n   *        The player tag\n   *\n   * @return {Object}\n   *         An object containing all of the settings\n   *         for a player tag\n   */\n  ;\n\n  Player.getTagSettings = function getTagSettings(tag) {\n    var baseOptions = {\n      sources: [],\n      tracks: []\n    };\n    var tagOptions = getAttributes(tag);\n    var dataSetup = tagOptions['data-setup'];\n\n    if (hasClass(tag, 'vjs-fill')) {\n      tagOptions.fill = true;\n    }\n\n    if (hasClass(tag, 'vjs-fluid')) {\n      tagOptions.fluid = true;\n    } // Check if data-setup attr exists.\n\n\n    if (dataSetup !== null) {\n      // Parse options JSON\n      // If empty string, make it a parsable json object.\n      var _safeParseTuple = safeParseTuple(dataSetup || '{}'),\n          err = _safeParseTuple[0],\n          data = _safeParseTuple[1];\n\n      if (err) {\n        log.error(err);\n      }\n\n      assign(tagOptions, data);\n    }\n\n    assign(baseOptions, tagOptions); // Get tag children settings\n\n    if (tag.hasChildNodes()) {\n      var children = tag.childNodes;\n\n      for (var i = 0, j = children.length; i < j; i++) {\n        var child = children[i]; // Change case needed: http://ejohn.org/blog/nodename-case-sensitivity/\n\n        var childName = child.nodeName.toLowerCase();\n\n        if (childName === 'source') {\n          baseOptions.sources.push(getAttributes(child));\n        } else if (childName === 'track') {\n          baseOptions.tracks.push(getAttributes(child));\n        }\n      }\n    }\n\n    return baseOptions;\n  }\n  /**\n   * Determine whether or not flexbox is supported\n   *\n   * @return {boolean}\n   *         - true if flexbox is supported\n   *         - false if flexbox is not supported\n   */\n  ;\n\n  _proto.flexNotSupported_ = function flexNotSupported_() {\n    var elem = document.createElement('i'); // Note: We don't actually use flexBasis (or flexOrder), but it's one of the more\n    // common flex features that we can rely on when checking for flex support.\n\n    return !('flexBasis' in elem.style || 'webkitFlexBasis' in elem.style || 'mozFlexBasis' in elem.style || 'msFlexBasis' in elem.style || // IE10-specific (2012 flex spec), available for completeness\n    'msFlexOrder' in elem.style);\n  };\n\n  return Player;\n}(Component);\n/**\n * Get the {@link VideoTrackList}\n * @link https://html.spec.whatwg.org/multipage/embedded-content.html#videotracklist\n *\n * @return {VideoTrackList}\n *         the current video track list\n *\n * @method Player.prototype.videoTracks\n */\n\n/**\n * Get the {@link AudioTrackList}\n * @link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist\n *\n * @return {AudioTrackList}\n *         the current audio track list\n *\n * @method Player.prototype.audioTracks\n */\n\n/**\n * Get the {@link TextTrackList}\n *\n * @link http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-texttracks\n *\n * @return {TextTrackList}\n *         the current text track list\n *\n * @method Player.prototype.textTracks\n */\n\n/**\n * Get the remote {@link TextTrackList}\n *\n * @return {TextTrackList}\n *         The current remote text track list\n *\n * @method Player.prototype.remoteTextTracks\n */\n\n/**\n * Get the remote {@link HtmlTrackElementList} tracks.\n *\n * @return {HtmlTrackElementList}\n *         The current remote text track element list\n *\n * @method Player.prototype.remoteTextTrackEls\n */\n\n\nALL.names.forEach(function (name) {\n  var props = ALL[name];\n\n  Player.prototype[props.getterName] = function () {\n    if (this.tech_) {\n      return this.tech_[props.getterName]();\n    } // if we have not yet loadTech_, we create {video,audio,text}Tracks_\n    // these will be passed to the tech during loading\n\n\n    this[props.privateName] = this[props.privateName] || new props.ListClass();\n    return this[props.privateName];\n  };\n});\n/**\n * Global enumeration of players.\n *\n * The keys are the player IDs and the values are either the {@link Player}\n * instance or `null` for disposed players.\n *\n * @type {Object}\n */\n\nPlayer.players = {};\nvar navigator = window$1.navigator;\n/*\n * Player instance options, surfaced using options\n * options = Player.prototype.options_\n * Make changes in options, not here.\n *\n * @type {Object}\n * @private\n */\n\nPlayer.prototype.options_ = {\n  // Default order of fallback technology\n  techOrder: Tech.defaultTechOrder_,\n  html5: {},\n  flash: {},\n  // default inactivity timeout\n  inactivityTimeout: 2000,\n  // default playback rates\n  playbackRates: [],\n  // Add playback rate selection by adding rates\n  // 'playbackRates': [0.5, 1, 1.5, 2],\n  liveui: false,\n  // Included control sets\n  children: ['mediaLoader', 'posterImage', 'textTrackDisplay', 'loadingSpinner', 'bigPlayButton', 'liveTracker', 'controlBar', 'errorDisplay', 'textTrackSettings', 'resizeManager'],\n  language: navigator && (navigator.languages && navigator.languages[0] || navigator.userLanguage || navigator.language) || 'en',\n  // locales and their language translations\n  languages: {},\n  // Default message to show when a video cannot be played.\n  notSupportedMessage: 'No compatible source was found for this media.',\n  fullscreen: {\n    options: {\n      navigationUI: 'hide'\n    }\n  },\n  breakpoints: {},\n  responsive: false\n};\n[\n/**\n * Returns whether or not the player is in the \"ended\" state.\n *\n * @return {Boolean} True if the player is in the ended state, false if not.\n * @method Player#ended\n */\n'ended',\n/**\n * Returns whether or not the player is in the \"seeking\" state.\n *\n * @return {Boolean} True if the player is in the seeking state, false if not.\n * @method Player#seeking\n */\n'seeking',\n/**\n * Returns the TimeRanges of the media that are currently available\n * for seeking to.\n *\n * @return {TimeRanges} the seekable intervals of the media timeline\n * @method Player#seekable\n */\n'seekable',\n/**\n * Returns the current state of network activity for the element, from\n * the codes in the list below.\n * - NETWORK_EMPTY (numeric value 0)\n *   The element has not yet been initialised. All attributes are in\n *   their initial states.\n * - NETWORK_IDLE (numeric value 1)\n *   The element's resource selection algorithm is active and has\n *   selected a resource, but it is not actually using the network at\n *   this time.\n * - NETWORK_LOADING (numeric value 2)\n *   The user agent is actively trying to download data.\n * - NETWORK_NO_SOURCE (numeric value 3)\n *   The element's resource selection algorithm is active, but it has\n *   not yet found a resource to use.\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#network-states\n * @return {number} the current network activity state\n * @method Player#networkState\n */\n'networkState',\n/**\n * Returns a value that expresses the current state of the element\n * with respect to rendering the current playback position, from the\n * codes in the list below.\n * - HAVE_NOTHING (numeric value 0)\n *   No information regarding the media resource is available.\n * - HAVE_METADATA (numeric value 1)\n *   Enough of the resource has been obtained that the duration of the\n *   resource is available.\n * - HAVE_CURRENT_DATA (numeric value 2)\n *   Data for the immediate current playback position is available.\n * - HAVE_FUTURE_DATA (numeric value 3)\n *   Data for the immediate current playback position is available, as\n *   well as enough data for the user agent to advance the current\n *   playback position in the direction of playback.\n * - HAVE_ENOUGH_DATA (numeric value 4)\n *   The user agent estimates that enough data is available for\n *   playback to proceed uninterrupted.\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-readystate\n * @return {number} the current playback rendering state\n * @method Player#readyState\n */\n'readyState'].forEach(function (fn) {\n  Player.prototype[fn] = function () {\n    return this.techGet_(fn);\n  };\n});\nTECH_EVENTS_RETRIGGER.forEach(function (event) {\n  Player.prototype[\"handleTech\" + toTitleCase(event) + \"_\"] = function () {\n    return this.trigger(event);\n  };\n});\n/**\n * Fired when the player has initial duration and dimension information\n *\n * @event Player#loadedmetadata\n * @type {EventTarget~Event}\n */\n\n/**\n * Fired when the player has downloaded data at the current playback position\n *\n * @event Player#loadeddata\n * @type {EventTarget~Event}\n */\n\n/**\n * Fired when the current playback position has changed *\n * During playback this is fired every 15-250 milliseconds, depending on the\n * playback technology in use.\n *\n * @event Player#timeupdate\n * @type {EventTarget~Event}\n */\n\n/**\n * Fired when the volume changes\n *\n * @event Player#volumechange\n * @type {EventTarget~Event}\n */\n\n/**\n * Reports whether or not a player has a plugin available.\n *\n * This does not report whether or not the plugin has ever been initialized\n * on this player. For that, [usingPlugin]{@link Player#usingPlugin}.\n *\n * @method Player#hasPlugin\n * @param  {string}  name\n *         The name of a plugin.\n *\n * @return {boolean}\n *         Whether or not this player has the requested plugin available.\n */\n\n/**\n * Reports whether or not a player is using a plugin by name.\n *\n * For basic plugins, this only reports whether the plugin has _ever_ been\n * initialized on this player.\n *\n * @method Player#usingPlugin\n * @param  {string} name\n *         The name of a plugin.\n *\n * @return {boolean}\n *         Whether or not this player is using the requested plugin.\n */\n\nComponent.registerComponent('Player', Player);\n/**\n * The base plugin name.\n *\n * @private\n * @constant\n * @type {string}\n */\n\nvar BASE_PLUGIN_NAME = 'plugin';\n/**\n * The key on which a player's active plugins cache is stored.\n *\n * @private\n * @constant\n * @type     {string}\n */\n\nvar PLUGIN_CACHE_KEY = 'activePlugins_';\n/**\n * Stores registered plugins in a private space.\n *\n * @private\n * @type    {Object}\n */\n\nvar pluginStorage = {};\n/**\n * Reports whether or not a plugin has been registered.\n *\n * @private\n * @param   {string} name\n *          The name of a plugin.\n *\n * @return {boolean}\n *          Whether or not the plugin has been registered.\n */\n\nvar pluginExists = function pluginExists(name) {\n  return pluginStorage.hasOwnProperty(name);\n};\n/**\n * Get a single registered plugin by name.\n *\n * @private\n * @param   {string} name\n *          The name of a plugin.\n *\n * @return {Function|undefined}\n *          The plugin (or undefined).\n */\n\n\nvar getPlugin = function getPlugin(name) {\n  return pluginExists(name) ? pluginStorage[name] : undefined;\n};\n/**\n * Marks a plugin as \"active\" on a player.\n *\n * Also, ensures that the player has an object for tracking active plugins.\n *\n * @private\n * @param   {Player} player\n *          A Video.js player instance.\n *\n * @param   {string} name\n *          The name of a plugin.\n */\n\n\nvar markPluginAsActive = function markPluginAsActive(player, name) {\n  player[PLUGIN_CACHE_KEY] = player[PLUGIN_CACHE_KEY] || {};\n  player[PLUGIN_CACHE_KEY][name] = true;\n};\n/**\n * Triggers a pair of plugin setup events.\n *\n * @private\n * @param  {Player} player\n *         A Video.js player instance.\n *\n * @param  {Plugin~PluginEventHash} hash\n *         A plugin event hash.\n *\n * @param  {boolean} [before]\n *         If true, prefixes the event name with \"before\". In other words,\n *         use this to trigger \"beforepluginsetup\" instead of \"pluginsetup\".\n */\n\n\nvar triggerSetupEvent = function triggerSetupEvent(player, hash, before) {\n  var eventName = (before ? 'before' : '') + 'pluginsetup';\n  player.trigger(eventName, hash);\n  player.trigger(eventName + ':' + hash.name, hash);\n};\n/**\n * Takes a basic plugin function and returns a wrapper function which marks\n * on the player that the plugin has been activated.\n *\n * @private\n * @param   {string} name\n *          The name of the plugin.\n *\n * @param   {Function} plugin\n *          The basic plugin.\n *\n * @return {Function}\n *          A wrapper function for the given plugin.\n */\n\n\nvar createBasicPlugin = function createBasicPlugin(name, plugin) {\n  var basicPluginWrapper = function basicPluginWrapper() {\n    // We trigger the \"beforepluginsetup\" and \"pluginsetup\" events on the player\n    // regardless, but we want the hash to be consistent with the hash provided\n    // for advanced plugins.\n    //\n    // The only potentially counter-intuitive thing here is the `instance` in\n    // the \"pluginsetup\" event is the value returned by the `plugin` function.\n    triggerSetupEvent(this, {\n      name: name,\n      plugin: plugin,\n      instance: null\n    }, true);\n    var instance = plugin.apply(this, arguments);\n    markPluginAsActive(this, name);\n    triggerSetupEvent(this, {\n      name: name,\n      plugin: plugin,\n      instance: instance\n    });\n    return instance;\n  };\n\n  Object.keys(plugin).forEach(function (prop) {\n    basicPluginWrapper[prop] = plugin[prop];\n  });\n  return basicPluginWrapper;\n};\n/**\n * Takes a plugin sub-class and returns a factory function for generating\n * instances of it.\n *\n * This factory function will replace itself with an instance of the requested\n * sub-class of Plugin.\n *\n * @private\n * @param   {string} name\n *          The name of the plugin.\n *\n * @param   {Plugin} PluginSubClass\n *          The advanced plugin.\n *\n * @return {Function}\n */\n\n\nvar createPluginFactory = function createPluginFactory(name, PluginSubClass) {\n  // Add a `name` property to the plugin prototype so that each plugin can\n  // refer to itself by name.\n  PluginSubClass.prototype.name = name;\n  return function () {\n    triggerSetupEvent(this, {\n      name: name,\n      plugin: PluginSubClass,\n      instance: null\n    }, true);\n\n    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    var instance = _construct(PluginSubClass, [this].concat(args)); // The plugin is replaced by a function that returns the current instance.\n\n\n    this[name] = function () {\n      return instance;\n    };\n\n    triggerSetupEvent(this, instance.getEventHash());\n    return instance;\n  };\n};\n/**\n * Parent class for all advanced plugins.\n *\n * @mixes   module:evented~EventedMixin\n * @mixes   module:stateful~StatefulMixin\n * @fires   Player#beforepluginsetup\n * @fires   Player#beforepluginsetup:$name\n * @fires   Player#pluginsetup\n * @fires   Player#pluginsetup:$name\n * @listens Player#dispose\n * @throws  {Error}\n *          If attempting to instantiate the base {@link Plugin} class\n *          directly instead of via a sub-class.\n */\n\n\nvar Plugin =\n/*#__PURE__*/\nfunction () {\n  /**\n   * Creates an instance of this class.\n   *\n   * Sub-classes should call `super` to ensure plugins are properly initialized.\n   *\n   * @param {Player} player\n   *        A Video.js player instance.\n   */\n  function Plugin(player) {\n    if (this.constructor === Plugin) {\n      throw new Error('Plugin must be sub-classed; not directly instantiated.');\n    }\n\n    this.player = player; // Make this object evented, but remove the added `trigger` method so we\n    // use the prototype version instead.\n\n    evented(this);\n    delete this.trigger;\n    stateful(this, this.constructor.defaultState);\n    markPluginAsActive(player, this.name); // Auto-bind the dispose method so we can use it as a listener and unbind\n    // it later easily.\n\n    this.dispose = bind(this, this.dispose); // If the player is disposed, dispose the plugin.\n\n    player.on('dispose', this.dispose);\n  }\n  /**\n   * Get the version of the plugin that was set on <pluginName>.VERSION\n   */\n\n\n  var _proto = Plugin.prototype;\n\n  _proto.version = function version() {\n    return this.constructor.VERSION;\n  }\n  /**\n   * Each event triggered by plugins includes a hash of additional data with\n   * conventional properties.\n   *\n   * This returns that object or mutates an existing hash.\n   *\n   * @param   {Object} [hash={}]\n   *          An object to be used as event an event hash.\n   *\n   * @return {Plugin~PluginEventHash}\n   *          An event hash object with provided properties mixed-in.\n   */\n  ;\n\n  _proto.getEventHash = function getEventHash(hash) {\n    if (hash === void 0) {\n      hash = {};\n    }\n\n    hash.name = this.name;\n    hash.plugin = this.constructor;\n    hash.instance = this;\n    return hash;\n  }\n  /**\n   * Triggers an event on the plugin object and overrides\n   * {@link module:evented~EventedMixin.trigger|EventedMixin.trigger}.\n   *\n   * @param   {string|Object} event\n   *          An event type or an object with a type property.\n   *\n   * @param   {Object} [hash={}]\n   *          Additional data hash to merge with a\n   *          {@link Plugin~PluginEventHash|PluginEventHash}.\n   *\n   * @return {boolean}\n   *          Whether or not default was prevented.\n   */\n  ;\n\n  _proto.trigger = function trigger$1(event, hash) {\n    if (hash === void 0) {\n      hash = {};\n    }\n\n    return trigger(this.eventBusEl_, event, this.getEventHash(hash));\n  }\n  /**\n   * Handles \"statechanged\" events on the plugin. No-op by default, override by\n   * subclassing.\n   *\n   * @abstract\n   * @param    {Event} e\n   *           An event object provided by a \"statechanged\" event.\n   *\n   * @param    {Object} e.changes\n   *           An object describing changes that occurred with the \"statechanged\"\n   *           event.\n   */\n  ;\n\n  _proto.handleStateChanged = function handleStateChanged(e) {}\n  /**\n   * Disposes a plugin.\n   *\n   * Subclasses can override this if they want, but for the sake of safety,\n   * it's probably best to subscribe the \"dispose\" event.\n   *\n   * @fires Plugin#dispose\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    var name = this.name,\n        player = this.player;\n    /**\n     * Signals that a advanced plugin is about to be disposed.\n     *\n     * @event Plugin#dispose\n     * @type  {EventTarget~Event}\n     */\n\n    this.trigger('dispose');\n    this.off();\n    player.off('dispose', this.dispose); // Eliminate any possible sources of leaking memory by clearing up\n    // references between the player and the plugin instance and nulling out\n    // the plugin's state and replacing methods with a function that throws.\n\n    player[PLUGIN_CACHE_KEY][name] = false;\n    this.player = this.state = null; // Finally, replace the plugin name on the player with a new factory\n    // function, so that the plugin is ready to be set up again.\n\n    player[name] = createPluginFactory(name, pluginStorage[name]);\n  }\n  /**\n   * Determines if a plugin is a basic plugin (i.e. not a sub-class of `Plugin`).\n   *\n   * @param   {string|Function} plugin\n   *          If a string, matches the name of a plugin. If a function, will be\n   *          tested directly.\n   *\n   * @return {boolean}\n   *          Whether or not a plugin is a basic plugin.\n   */\n  ;\n\n  Plugin.isBasic = function isBasic(plugin) {\n    var p = typeof plugin === 'string' ? getPlugin(plugin) : plugin;\n    return typeof p === 'function' && !Plugin.prototype.isPrototypeOf(p.prototype);\n  }\n  /**\n   * Register a Video.js plugin.\n   *\n   * @param   {string} name\n   *          The name of the plugin to be registered. Must be a string and\n   *          must not match an existing plugin or a method on the `Player`\n   *          prototype.\n   *\n   * @param   {Function} plugin\n   *          A sub-class of `Plugin` or a function for basic plugins.\n   *\n   * @return {Function}\n   *          For advanced plugins, a factory function for that plugin. For\n   *          basic plugins, a wrapper function that initializes the plugin.\n   */\n  ;\n\n  Plugin.registerPlugin = function registerPlugin(name, plugin) {\n    if (typeof name !== 'string') {\n      throw new Error(\"Illegal plugin name, \\\"\" + name + \"\\\", must be a string, was \" + typeof name + \".\");\n    }\n\n    if (pluginExists(name)) {\n      log.warn(\"A plugin named \\\"\" + name + \"\\\" already exists. You may want to avoid re-registering plugins!\");\n    } else if (Player.prototype.hasOwnProperty(name)) {\n      throw new Error(\"Illegal plugin name, \\\"\" + name + \"\\\", cannot share a name with an existing player method!\");\n    }\n\n    if (typeof plugin !== 'function') {\n      throw new Error(\"Illegal plugin for \\\"\" + name + \"\\\", must be a function, was \" + typeof plugin + \".\");\n    }\n\n    pluginStorage[name] = plugin; // Add a player prototype method for all sub-classed plugins (but not for\n    // the base Plugin class).\n\n    if (name !== BASE_PLUGIN_NAME) {\n      if (Plugin.isBasic(plugin)) {\n        Player.prototype[name] = createBasicPlugin(name, plugin);\n      } else {\n        Player.prototype[name] = createPluginFactory(name, plugin);\n      }\n    }\n\n    return plugin;\n  }\n  /**\n   * De-register a Video.js plugin.\n   *\n   * @param  {string} name\n   *         The name of the plugin to be de-registered. Must be a string that\n   *         matches an existing plugin.\n   *\n   * @throws {Error}\n   *         If an attempt is made to de-register the base plugin.\n   */\n  ;\n\n  Plugin.deregisterPlugin = function deregisterPlugin(name) {\n    if (name === BASE_PLUGIN_NAME) {\n      throw new Error('Cannot de-register base plugin.');\n    }\n\n    if (pluginExists(name)) {\n      delete pluginStorage[name];\n      delete Player.prototype[name];\n    }\n  }\n  /**\n   * Gets an object containing multiple Video.js plugins.\n   *\n   * @param   {Array} [names]\n   *          If provided, should be an array of plugin names. Defaults to _all_\n   *          plugin names.\n   *\n   * @return {Object|undefined}\n   *          An object containing plugin(s) associated with their name(s) or\n   *          `undefined` if no matching plugins exist).\n   */\n  ;\n\n  Plugin.getPlugins = function getPlugins(names) {\n    if (names === void 0) {\n      names = Object.keys(pluginStorage);\n    }\n\n    var result;\n    names.forEach(function (name) {\n      var plugin = getPlugin(name);\n\n      if (plugin) {\n        result = result || {};\n        result[name] = plugin;\n      }\n    });\n    return result;\n  }\n  /**\n   * Gets a plugin's version, if available\n   *\n   * @param   {string} name\n   *          The name of a plugin.\n   *\n   * @return {string}\n   *          The plugin's version or an empty string.\n   */\n  ;\n\n  Plugin.getPluginVersion = function getPluginVersion(name) {\n    var plugin = getPlugin(name);\n    return plugin && plugin.VERSION || '';\n  };\n\n  return Plugin;\n}();\n/**\n * Gets a plugin by name if it exists.\n *\n * @static\n * @method   getPlugin\n * @memberOf Plugin\n * @param    {string} name\n *           The name of a plugin.\n *\n * @returns  {Function|undefined}\n *           The plugin (or `undefined`).\n */\n\n\nPlugin.getPlugin = getPlugin;\n/**\n * The name of the base plugin class as it is registered.\n *\n * @type {string}\n */\n\nPlugin.BASE_PLUGIN_NAME = BASE_PLUGIN_NAME;\nPlugin.registerPlugin(BASE_PLUGIN_NAME, Plugin);\n/**\n * Documented in player.js\n *\n * @ignore\n */\n\nPlayer.prototype.usingPlugin = function (name) {\n  return !!this[PLUGIN_CACHE_KEY] && this[PLUGIN_CACHE_KEY][name] === true;\n};\n/**\n * Documented in player.js\n *\n * @ignore\n */\n\n\nPlayer.prototype.hasPlugin = function (name) {\n  return !!pluginExists(name);\n};\n/**\n * Signals that a plugin is about to be set up on a player.\n *\n * @event    Player#beforepluginsetup\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * Signals that a plugin is about to be set up on a player - by name. The name\n * is the name of the plugin.\n *\n * @event    Player#beforepluginsetup:$name\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * Signals that a plugin has just been set up on a player.\n *\n * @event    Player#pluginsetup\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * Signals that a plugin has just been set up on a player - by name. The name\n * is the name of the plugin.\n *\n * @event    Player#pluginsetup:$name\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * @typedef  {Object} Plugin~PluginEventHash\n *\n * @property {string} instance\n *           For basic plugins, the return value of the plugin function. For\n *           advanced plugins, the plugin instance on which the event is fired.\n *\n * @property {string} name\n *           The name of the plugin.\n *\n * @property {string} plugin\n *           For basic plugins, the plugin function. For advanced plugins, the\n *           plugin class/constructor.\n */\n\n/**\n * @file extend.js\n * @module extend\n */\n\n/**\n * A combination of node inherits and babel's inherits (after transpile).\n * Both work the same but node adds `super_` to the subClass\n * and Bable adds the superClass as __proto__. Both seem useful.\n *\n * @param {Object} subClass\n *        The class to inherit to\n *\n * @param {Object} superClass\n *        The class to inherit from\n *\n * @private\n */\n\n\nvar _inherits = function _inherits(subClass, superClass) {\n  if (typeof superClass !== 'function' && superClass !== null) {\n    throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass);\n  }\n\n  subClass.prototype = Object.create(superClass && superClass.prototype, {\n    constructor: {\n      value: subClass,\n      enumerable: false,\n      writable: true,\n      configurable: true\n    }\n  });\n\n  if (superClass) {\n    // node\n    subClass.super_ = superClass;\n  }\n};\n/**\n * Used to subclass an existing class by emulating ES subclassing using the\n * `extends` keyword.\n *\n * @function\n * @example\n * var MyComponent = videojs.extend(videojs.getComponent('Component'), {\n *   myCustomMethod: function() {\n *     // Do things in my method.\n *   }\n * });\n *\n * @param    {Function} superClass\n *           The class to inherit from\n *\n * @param    {Object}   [subClassMethods={}]\n *           Methods of the new class\n *\n * @return   {Function}\n *           The new class with subClassMethods that inherited superClass.\n */\n\n\nvar extend = function extend(superClass, subClassMethods) {\n  if (subClassMethods === void 0) {\n    subClassMethods = {};\n  }\n\n  var subClass = function subClass() {\n    superClass.apply(this, arguments);\n  };\n\n  var methods = {};\n\n  if (typeof subClassMethods === 'object') {\n    if (subClassMethods.constructor !== Object.prototype.constructor) {\n      subClass = subClassMethods.constructor;\n    }\n\n    methods = subClassMethods;\n  } else if (typeof subClassMethods === 'function') {\n    subClass = subClassMethods;\n  }\n\n  _inherits(subClass, superClass); // Extend subObj's prototype with functions and other properties from props\n\n\n  for (var name in methods) {\n    if (methods.hasOwnProperty(name)) {\n      subClass.prototype[name] = methods[name];\n    }\n  }\n\n  return subClass;\n};\n/**\n * @file video.js\n * @module videojs\n */\n\n/**\n * Normalize an `id` value by trimming off a leading `#`\n *\n * @private\n * @param   {string} id\n *          A string, maybe with a leading `#`.\n *\n * @return {string}\n *          The string, without any leading `#`.\n */\n\n\nvar normalizeId = function normalizeId(id) {\n  return id.indexOf('#') === 0 ? id.slice(1) : id;\n};\n/**\n * The `videojs()` function doubles as the main function for users to create a\n * {@link Player} instance as well as the main library namespace.\n *\n * It can also be used as a getter for a pre-existing {@link Player} instance.\n * However, we _strongly_ recommend using `videojs.getPlayer()` for this\n * purpose because it avoids any potential for unintended initialization.\n *\n * Due to [limitations](https://github.com/jsdoc3/jsdoc/issues/955#issuecomment-313829149)\n * of our JSDoc template, we cannot properly document this as both a function\n * and a namespace, so its function signature is documented here.\n *\n * #### Arguments\n * ##### id\n * string|Element, **required**\n *\n * Video element or video element ID.\n *\n * ##### options\n * Object, optional\n *\n * Options object for providing settings.\n * See: [Options Guide](https://docs.videojs.com/tutorial-options.html).\n *\n * ##### ready\n * {@link Component~ReadyCallback}, optional\n *\n * A function to be called when the {@link Player} and {@link Tech} are ready.\n *\n * #### Return Value\n *\n * The `videojs()` function returns a {@link Player} instance.\n *\n * @namespace\n *\n * @borrows AudioTrack as AudioTrack\n * @borrows Component.getComponent as getComponent\n * @borrows module:computed-style~computedStyle as computedStyle\n * @borrows module:events.on as on\n * @borrows module:events.one as one\n * @borrows module:events.off as off\n * @borrows module:events.trigger as trigger\n * @borrows EventTarget as EventTarget\n * @borrows module:extend~extend as extend\n * @borrows module:fn.bind as bind\n * @borrows module:format-time.formatTime as formatTime\n * @borrows module:format-time.resetFormatTime as resetFormatTime\n * @borrows module:format-time.setFormatTime as setFormatTime\n * @borrows module:merge-options.mergeOptions as mergeOptions\n * @borrows module:middleware.use as use\n * @borrows Player.players as players\n * @borrows Plugin.registerPlugin as registerPlugin\n * @borrows Plugin.deregisterPlugin as deregisterPlugin\n * @borrows Plugin.getPlugins as getPlugins\n * @borrows Plugin.getPlugin as getPlugin\n * @borrows Plugin.getPluginVersion as getPluginVersion\n * @borrows Tech.getTech as getTech\n * @borrows Tech.registerTech as registerTech\n * @borrows TextTrack as TextTrack\n * @borrows module:time-ranges.createTimeRanges as createTimeRange\n * @borrows module:time-ranges.createTimeRanges as createTimeRanges\n * @borrows module:url.isCrossOrigin as isCrossOrigin\n * @borrows module:url.parseUrl as parseUrl\n * @borrows VideoTrack as VideoTrack\n *\n * @param  {string|Element} id\n *         Video element or video element ID.\n *\n * @param  {Object} [options]\n *         Options object for providing settings.\n *         See: [Options Guide](https://docs.videojs.com/tutorial-options.html).\n *\n * @param  {Component~ReadyCallback} [ready]\n *         A function to be called when the {@link Player} and {@link Tech} are\n *         ready.\n *\n * @return {Player}\n *         The `videojs()` function returns a {@link Player|Player} instance.\n */\n\n\nfunction videojs$1(id, options, ready) {\n  var player = videojs$1.getPlayer(id);\n\n  if (player) {\n    if (options) {\n      log.warn(\"Player \\\"\" + id + \"\\\" is already initialised. Options will not be applied.\");\n    }\n\n    if (ready) {\n      player.ready(ready);\n    }\n\n    return player;\n  }\n\n  var el = typeof id === 'string' ? $('#' + normalizeId(id)) : id;\n\n  if (!isEl(el)) {\n    throw new TypeError('The element or ID supplied is not valid. (videojs)');\n  } // document.body.contains(el) will only check if el is contained within that one document.\n  // This causes problems for elements in iframes.\n  // Instead, use the element's ownerDocument instead of the global document.\n  // This will make sure that the element is indeed in the dom of that document.\n  // Additionally, check that the document in question has a default view.\n  // If the document is no longer attached to the dom, the defaultView of the document will be null.\n\n\n  if (!el.ownerDocument.defaultView || !el.ownerDocument.body.contains(el)) {\n    log.warn('The element supplied is not included in the DOM');\n  }\n\n  options = options || {};\n  videojs$1.hooks('beforesetup').forEach(function (hookFunction) {\n    var opts = hookFunction(el, mergeOptions(options));\n\n    if (!isObject(opts) || Array.isArray(opts)) {\n      log.error('please return an object in beforesetup hooks');\n      return;\n    }\n\n    options = mergeOptions(options, opts);\n  }); // We get the current \"Player\" component here in case an integration has\n  // replaced it with a custom player.\n\n  var PlayerComponent = Component.getComponent('Player');\n  player = new PlayerComponent(el, options, ready);\n  videojs$1.hooks('setup').forEach(function (hookFunction) {\n    return hookFunction(player);\n  });\n  return player;\n}\n/**\n * An Object that contains lifecycle hooks as keys which point to an array\n * of functions that are run when a lifecycle is triggered\n *\n * @private\n */\n\n\nvideojs$1.hooks_ = {};\n/**\n * Get a list of hooks for a specific lifecycle\n *\n * @param  {string} type\n *         the lifecyle to get hooks from\n *\n * @param  {Function|Function[]} [fn]\n *         Optionally add a hook (or hooks) to the lifecycle that your are getting.\n *\n * @return {Array}\n *         an array of hooks, or an empty array if there are none.\n */\n\nvideojs$1.hooks = function (type, fn) {\n  videojs$1.hooks_[type] = videojs$1.hooks_[type] || [];\n\n  if (fn) {\n    videojs$1.hooks_[type] = videojs$1.hooks_[type].concat(fn);\n  }\n\n  return videojs$1.hooks_[type];\n};\n/**\n * Add a function hook to a specific videojs lifecycle.\n *\n * @param {string} type\n *        the lifecycle to hook the function to.\n *\n * @param {Function|Function[]}\n *        The function or array of functions to attach.\n */\n\n\nvideojs$1.hook = function (type, fn) {\n  videojs$1.hooks(type, fn);\n};\n/**\n * Add a function hook that will only run once to a specific videojs lifecycle.\n *\n * @param {string} type\n *        the lifecycle to hook the function to.\n *\n * @param {Function|Function[]}\n *        The function or array of functions to attach.\n */\n\n\nvideojs$1.hookOnce = function (type, fn) {\n  videojs$1.hooks(type, [].concat(fn).map(function (original) {\n    var wrapper = function wrapper() {\n      videojs$1.removeHook(type, wrapper);\n      return original.apply(void 0, arguments);\n    };\n\n    return wrapper;\n  }));\n};\n/**\n * Remove a hook from a specific videojs lifecycle.\n *\n * @param  {string} type\n *         the lifecycle that the function hooked to\n *\n * @param  {Function} fn\n *         The hooked function to remove\n *\n * @return {boolean}\n *         The function that was removed or undef\n */\n\n\nvideojs$1.removeHook = function (type, fn) {\n  var index = videojs$1.hooks(type).indexOf(fn);\n\n  if (index <= -1) {\n    return false;\n  }\n\n  videojs$1.hooks_[type] = videojs$1.hooks_[type].slice();\n  videojs$1.hooks_[type].splice(index, 1);\n  return true;\n}; // Add default styles\n\n\nif (window$1.VIDEOJS_NO_DYNAMIC_STYLE !== true && isReal()) {\n  var style = $('.vjs-styles-defaults');\n\n  if (!style) {\n    style = createStyleElement('vjs-styles-defaults');\n    var head = $('head');\n\n    if (head) {\n      head.insertBefore(style, head.firstChild);\n    }\n\n    setTextContent(style, \"\\n      .video-js {\\n        width: 300px;\\n        height: 150px;\\n      }\\n\\n      .vjs-fluid {\\n        padding-top: 56.25%\\n      }\\n    \");\n  }\n} // Run Auto-load players\n// You have to wait at least once in case this script is loaded after your\n// video in the DOM (weird behavior only with minified version)\n\n\nautoSetupTimeout(1, videojs$1);\n/**\n * Current Video.js version. Follows [semantic versioning](https://semver.org/).\n *\n * @type {string}\n */\n\nvideojs$1.VERSION = version;\n/**\n * The global options object. These are the settings that take effect\n * if no overrides are specified when the player is created.\n *\n * @type {Object}\n */\n\nvideojs$1.options = Player.prototype.options_;\n/**\n * Get an object with the currently created players, keyed by player ID\n *\n * @return {Object}\n *         The created players\n */\n\nvideojs$1.getPlayers = function () {\n  return Player.players;\n};\n/**\n * Get a single player based on an ID or DOM element.\n *\n * This is useful if you want to check if an element or ID has an associated\n * Video.js player, but not create one if it doesn't.\n *\n * @param   {string|Element} id\n *          An HTML element - `<video>`, `<audio>`, or `<video-js>` -\n *          or a string matching the `id` of such an element.\n *\n * @return {Player|undefined}\n *          A player instance or `undefined` if there is no player instance\n *          matching the argument.\n */\n\n\nvideojs$1.getPlayer = function (id) {\n  var players = Player.players;\n  var tag;\n\n  if (typeof id === 'string') {\n    var nId = normalizeId(id);\n    var player = players[nId];\n\n    if (player) {\n      return player;\n    }\n\n    tag = $('#' + nId);\n  } else {\n    tag = id;\n  }\n\n  if (isEl(tag)) {\n    var _tag = tag,\n        _player = _tag.player,\n        playerId = _tag.playerId; // Element may have a `player` property referring to an already created\n    // player instance. If so, return that.\n\n    if (_player || players[playerId]) {\n      return _player || players[playerId];\n    }\n  }\n};\n/**\n * Returns an array of all current players.\n *\n * @return {Array}\n *         An array of all players. The array will be in the order that\n *         `Object.keys` provides, which could potentially vary between\n *         JavaScript engines.\n *\n */\n\n\nvideojs$1.getAllPlayers = function () {\n  return (// Disposed players leave a key with a `null` value, so we need to make sure\n    // we filter those out.\n    Object.keys(Player.players).map(function (k) {\n      return Player.players[k];\n    }).filter(Boolean)\n  );\n};\n\nvideojs$1.players = Player.players;\nvideojs$1.getComponent = Component.getComponent;\n/**\n * Register a component so it can referred to by name. Used when adding to other\n * components, either through addChild `component.addChild('myComponent')` or through\n * default children options  `{ children: ['myComponent'] }`.\n *\n * > NOTE: You could also just initialize the component before adding.\n * `component.addChild(new MyComponent());`\n *\n * @param {string} name\n *        The class name of the component\n *\n * @param {Component} comp\n *        The component class\n *\n * @return {Component}\n *         The newly registered component\n */\n\nvideojs$1.registerComponent = function (name, comp) {\n  if (Tech.isTech(comp)) {\n    log.warn(\"The \" + name + \" tech was registered as a component. It should instead be registered using videojs.registerTech(name, tech)\");\n  }\n\n  Component.registerComponent.call(Component, name, comp);\n};\n\nvideojs$1.getTech = Tech.getTech;\nvideojs$1.registerTech = Tech.registerTech;\nvideojs$1.use = use;\n/**\n * An object that can be returned by a middleware to signify\n * that the middleware is being terminated.\n *\n * @type {object}\n * @property {object} middleware.TERMINATOR\n */\n\nObject.defineProperty(videojs$1, 'middleware', {\n  value: {},\n  writeable: false,\n  enumerable: true\n});\nObject.defineProperty(videojs$1.middleware, 'TERMINATOR', {\n  value: TERMINATOR,\n  writeable: false,\n  enumerable: true\n});\n/**\n * A reference to the {@link module:browser|browser utility module} as an object.\n *\n * @type {Object}\n * @see  {@link module:browser|browser}\n */\n\nvideojs$1.browser = browser;\n/**\n * Use {@link module:browser.TOUCH_ENABLED|browser.TOUCH_ENABLED} instead; only\n * included for backward-compatibility with 4.x.\n *\n * @deprecated Since version 5.0, use {@link module:browser.TOUCH_ENABLED|browser.TOUCH_ENABLED instead.\n * @type {boolean}\n */\n\nvideojs$1.TOUCH_ENABLED = TOUCH_ENABLED;\nvideojs$1.extend = extend;\nvideojs$1.mergeOptions = mergeOptions;\nvideojs$1.bind = bind;\nvideojs$1.registerPlugin = Plugin.registerPlugin;\nvideojs$1.deregisterPlugin = Plugin.deregisterPlugin;\n/**\n * Deprecated method to register a plugin with Video.js\n *\n * @deprecated videojs.plugin() is deprecated; use videojs.registerPlugin() instead\n *\n * @param {string} name\n *        The plugin name\n *\n * @param {Plugin|Function} plugin\n *         The plugin sub-class or function\n */\n\nvideojs$1.plugin = function (name, plugin) {\n  log.warn('videojs.plugin() is deprecated; use videojs.registerPlugin() instead');\n  return Plugin.registerPlugin(name, plugin);\n};\n\nvideojs$1.getPlugins = Plugin.getPlugins;\nvideojs$1.getPlugin = Plugin.getPlugin;\nvideojs$1.getPluginVersion = Plugin.getPluginVersion;\n/**\n * Adding languages so that they're available to all players.\n * Example: `videojs.addLanguage('es', { 'Hello': 'Hola' });`\n *\n * @param {string} code\n *        The language code or dictionary property\n *\n * @param {Object} data\n *        The data values to be translated\n *\n * @return {Object}\n *         The resulting language dictionary object\n */\n\nvideojs$1.addLanguage = function (code, data) {\n  var _mergeOptions;\n\n  code = ('' + code).toLowerCase();\n  videojs$1.options.languages = mergeOptions(videojs$1.options.languages, (_mergeOptions = {}, _mergeOptions[code] = data, _mergeOptions));\n  return videojs$1.options.languages[code];\n};\n/**\n * A reference to the {@link module:log|log utility module} as an object.\n *\n * @type {Function}\n * @see  {@link module:log|log}\n */\n\n\nvideojs$1.log = log;\nvideojs$1.createLogger = createLogger$1;\nvideojs$1.createTimeRange = videojs$1.createTimeRanges = createTimeRanges;\nvideojs$1.formatTime = formatTime;\nvideojs$1.setFormatTime = setFormatTime;\nvideojs$1.resetFormatTime = resetFormatTime;\nvideojs$1.parseUrl = parseUrl;\nvideojs$1.isCrossOrigin = isCrossOrigin;\nvideojs$1.EventTarget = EventTarget;\nvideojs$1.on = on;\nvideojs$1.one = one;\nvideojs$1.off = off;\nvideojs$1.trigger = trigger;\n/**\n * A cross-browser XMLHttpRequest wrapper.\n *\n * @function\n * @param    {Object} options\n *           Settings for the request.\n *\n * @return   {XMLHttpRequest|XDomainRequest}\n *           The request object.\n *\n * @see      https://github.com/Raynos/xhr\n */\n\nvideojs$1.xhr = XHR;\nvideojs$1.TextTrack = TextTrack;\nvideojs$1.AudioTrack = AudioTrack;\nvideojs$1.VideoTrack = VideoTrack;\n['isEl', 'isTextNode', 'createEl', 'hasClass', 'addClass', 'removeClass', 'toggleClass', 'setAttributes', 'getAttributes', 'emptyEl', 'appendContent', 'insertContent'].forEach(function (k) {\n  videojs$1[k] = function () {\n    log.warn(\"videojs.\" + k + \"() is deprecated; use videojs.dom.\" + k + \"() instead\");\n    return Dom[k].apply(null, arguments);\n  };\n});\nvideojs$1.computedStyle = computedStyle;\n/**\n * A reference to the {@link module:dom|DOM utility module} as an object.\n *\n * @type {Object}\n * @see  {@link module:dom|dom}\n */\n\nvideojs$1.dom = Dom;\n/**\n * A reference to the {@link module:url|URL utility module} as an object.\n *\n * @type {Object}\n * @see  {@link module:url|url}\n */\n\nvideojs$1.url = Url;\n/**\n * @videojs/http-streaming\n * @version 1.10.6\n * @copyright 2019 Brightcove, Inc\n * @license Apache-2.0\n */\n\n/**\n * @file resolve-url.js - Handling how URLs are resolved and manipulated\n */\n\nvar resolveUrl = function resolveUrl(baseURL, relativeURL) {\n  // return early if we don't need to resolve\n  if (/^[a-z]+:/i.test(relativeURL)) {\n    return relativeURL;\n  } // if the base URL is relative then combine with the current location\n\n\n  if (!/\\/\\//i.test(baseURL)) {\n    baseURL = URLToolkit.buildAbsoluteURL(window$1.location.href, baseURL);\n  }\n\n  return URLToolkit.buildAbsoluteURL(baseURL, relativeURL);\n};\n/**\n * Checks whether xhr request was redirected and returns correct url depending\n * on `handleManifestRedirects` option\n *\n * @api private\n *\n * @param  {String} url - an url being requested\n * @param  {XMLHttpRequest} req - xhr request result\n *\n * @return {String}\n */\n\n\nvar resolveManifestRedirect = function resolveManifestRedirect(handleManifestRedirect, url, req) {\n  // To understand how the responseURL below is set and generated:\n  // - https://fetch.spec.whatwg.org/#concept-response-url\n  // - https://fetch.spec.whatwg.org/#atomic-http-redirect-handling\n  if (handleManifestRedirect && req.responseURL && url !== req.responseURL) {\n    return req.responseURL;\n  }\n\n  return url;\n};\n\nvar classCallCheck = function classCallCheck(instance, Constructor) {\n  if (!(instance instanceof Constructor)) {\n    throw new TypeError(\"Cannot call a class as a function\");\n  }\n};\n\nvar createClass = function () {\n  function defineProperties(target, props) {\n    for (var i = 0; i < props.length; i++) {\n      var descriptor = props[i];\n      descriptor.enumerable = descriptor.enumerable || false;\n      descriptor.configurable = true;\n      if (\"value\" in descriptor) descriptor.writable = true;\n      Object.defineProperty(target, descriptor.key, descriptor);\n    }\n  }\n\n  return function (Constructor, protoProps, staticProps) {\n    if (protoProps) defineProperties(Constructor.prototype, protoProps);\n    if (staticProps) defineProperties(Constructor, staticProps);\n    return Constructor;\n  };\n}();\n\nvar get$1 = function get(object, property, receiver) {\n  if (object === null) object = Function.prototype;\n  var desc = Object.getOwnPropertyDescriptor(object, property);\n\n  if (desc === undefined) {\n    var parent = Object.getPrototypeOf(object);\n\n    if (parent === null) {\n      return undefined;\n    } else {\n      return get(parent, property, receiver);\n    }\n  } else if (\"value\" in desc) {\n    return desc.value;\n  } else {\n    var getter = desc.get;\n\n    if (getter === undefined) {\n      return undefined;\n    }\n\n    return getter.call(receiver);\n  }\n};\n\nvar inherits = function inherits(subClass, superClass) {\n  if (typeof superClass !== \"function\" && superClass !== null) {\n    throw new TypeError(\"Super expression must either be null or a function, not \" + typeof superClass);\n  }\n\n  subClass.prototype = Object.create(superClass && superClass.prototype, {\n    constructor: {\n      value: subClass,\n      enumerable: false,\n      writable: true,\n      configurable: true\n    }\n  });\n  if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;\n};\n\nvar possibleConstructorReturn = function possibleConstructorReturn(self, call) {\n  if (!self) {\n    throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n  }\n\n  return call && (typeof call === \"object\" || typeof call === \"function\") ? call : self;\n};\n\nvar slicedToArray = function () {\n  function sliceIterator(arr, i) {\n    var _arr = [];\n    var _n = true;\n    var _d = false;\n    var _e = undefined;\n\n    try {\n      for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {\n        _arr.push(_s.value);\n\n        if (i && _arr.length === i) break;\n      }\n    } catch (err) {\n      _d = true;\n      _e = err;\n    } finally {\n      try {\n        if (!_n && _i[\"return\"]) _i[\"return\"]();\n      } finally {\n        if (_d) throw _e;\n      }\n    }\n\n    return _arr;\n  }\n\n  return function (arr, i) {\n    if (Array.isArray(arr)) {\n      return arr;\n    } else if (Symbol.iterator in Object(arr)) {\n      return sliceIterator(arr, i);\n    } else {\n      throw new TypeError(\"Invalid attempt to destructure non-iterable instance\");\n    }\n  };\n}();\n/**\n * @file playlist-loader.js\n *\n * A state machine that manages the loading, caching, and updating of\n * M3U8 playlists.\n *\n */\n\n\nvar mergeOptions$1 = videojs$1.mergeOptions,\n    EventTarget$1 = videojs$1.EventTarget,\n    log$1 = videojs$1.log;\n/**\n * Loops through all supported media groups in master and calls the provided\n * callback for each group\n *\n * @param {Object} master\n *        The parsed master manifest object\n * @param {Function} callback\n *        Callback to call for each media group\n */\n\nvar forEachMediaGroup = function forEachMediaGroup(master, callback) {\n  ['AUDIO', 'SUBTITLES'].forEach(function (mediaType) {\n    for (var groupKey in master.mediaGroups[mediaType]) {\n      for (var labelKey in master.mediaGroups[mediaType][groupKey]) {\n        var mediaProperties = master.mediaGroups[mediaType][groupKey][labelKey];\n        callback(mediaProperties, mediaType, groupKey, labelKey);\n      }\n    }\n  });\n};\n/**\n  * Returns a new array of segments that is the result of merging\n  * properties from an older list of segments onto an updated\n  * list. No properties on the updated playlist will be overridden.\n  *\n  * @param {Array} original the outdated list of segments\n  * @param {Array} update the updated list of segments\n  * @param {Number=} offset the index of the first update\n  * segment in the original segment list. For non-live playlists,\n  * this should always be zero and does not need to be\n  * specified. For live playlists, it should be the difference\n  * between the media sequence numbers in the original and updated\n  * playlists.\n  * @return a list of merged segment objects\n  */\n\n\nvar updateSegments = function updateSegments(original, update, offset) {\n  var result = update.slice();\n  offset = offset || 0;\n  var length = Math.min(original.length, update.length + offset);\n\n  for (var i = offset; i < length; i++) {\n    result[i - offset] = mergeOptions$1(original[i], result[i - offset]);\n  }\n\n  return result;\n};\n\nvar resolveSegmentUris = function resolveSegmentUris(segment, baseUri) {\n  if (!segment.resolvedUri) {\n    segment.resolvedUri = resolveUrl(baseUri, segment.uri);\n  }\n\n  if (segment.key && !segment.key.resolvedUri) {\n    segment.key.resolvedUri = resolveUrl(baseUri, segment.key.uri);\n  }\n\n  if (segment.map && !segment.map.resolvedUri) {\n    segment.map.resolvedUri = resolveUrl(baseUri, segment.map.uri);\n  }\n};\n/**\n  * Returns a new master playlist that is the result of merging an\n  * updated media playlist into the original version. If the\n  * updated media playlist does not match any of the playlist\n  * entries in the original master playlist, null is returned.\n  *\n  * @param {Object} master a parsed master M3U8 object\n  * @param {Object} media a parsed media M3U8 object\n  * @return {Object} a new object that represents the original\n  * master playlist with the updated media playlist merged in, or\n  * null if the merge produced no change.\n  */\n\n\nvar updateMaster = function updateMaster(master, media) {\n  var result = mergeOptions$1(master, {});\n  var playlist = result.playlists[media.uri];\n\n  if (!playlist) {\n    return null;\n  } // consider the playlist unchanged if the number of segments is equal, the media\n  // sequence number is unchanged, and this playlist hasn't become the end of the playlist\n\n\n  if (playlist.segments && media.segments && playlist.segments.length === media.segments.length && playlist.endList === media.endList && playlist.mediaSequence === media.mediaSequence) {\n    return null;\n  }\n\n  var mergedPlaylist = mergeOptions$1(playlist, media); // if the update could overlap existing segment information, merge the two segment lists\n\n  if (playlist.segments) {\n    mergedPlaylist.segments = updateSegments(playlist.segments, media.segments, media.mediaSequence - playlist.mediaSequence);\n  } // resolve any segment URIs to prevent us from having to do it later\n\n\n  mergedPlaylist.segments.forEach(function (segment) {\n    resolveSegmentUris(segment, mergedPlaylist.resolvedUri);\n  }); // TODO Right now in the playlists array there are two references to each playlist, one\n  // that is referenced by index, and one by URI. The index reference may no longer be\n  // necessary.\n\n  for (var i = 0; i < result.playlists.length; i++) {\n    if (result.playlists[i].uri === media.uri) {\n      result.playlists[i] = mergedPlaylist;\n    }\n  }\n\n  result.playlists[media.uri] = mergedPlaylist;\n  return result;\n};\n\nvar setupMediaPlaylists = function setupMediaPlaylists(master) {\n  // setup by-URI lookups and resolve media playlist URIs\n  var i = master.playlists.length;\n\n  while (i--) {\n    var playlist = master.playlists[i];\n    master.playlists[playlist.uri] = playlist;\n    playlist.resolvedUri = resolveUrl(master.uri, playlist.uri);\n    playlist.id = i;\n\n    if (!playlist.attributes) {\n      // Although the spec states an #EXT-X-STREAM-INF tag MUST have a\n      // BANDWIDTH attribute, we can play the stream without it. This means a poorly\n      // formatted master playlist may not have an attribute list. An attributes\n      // property is added here to prevent undefined references when we encounter\n      // this scenario.\n      playlist.attributes = {};\n      log$1.warn('Invalid playlist STREAM-INF detected. Missing BANDWIDTH attribute.');\n    }\n  }\n};\n\nvar resolveMediaGroupUris = function resolveMediaGroupUris(master) {\n  forEachMediaGroup(master, function (properties) {\n    if (properties.uri) {\n      properties.resolvedUri = resolveUrl(master.uri, properties.uri);\n    }\n  });\n};\n/**\n * Calculates the time to wait before refreshing a live playlist\n *\n * @param {Object} media\n *        The current media\n * @param {Boolean} update\n *        True if there were any updates from the last refresh, false otherwise\n * @return {Number}\n *         The time in ms to wait before refreshing the live playlist\n */\n\n\nvar refreshDelay = function refreshDelay(media, update) {\n  var lastSegment = media.segments[media.segments.length - 1];\n  var delay = void 0;\n\n  if (update && lastSegment && lastSegment.duration) {\n    delay = lastSegment.duration * 1000;\n  } else {\n    // if the playlist is unchanged since the last reload or last segment duration\n    // cannot be determined, try again after half the target duration\n    delay = (media.targetDuration || 10) * 500;\n  }\n\n  return delay;\n};\n/**\n * Load a playlist from a remote location\n *\n * @class PlaylistLoader\n * @extends Stream\n * @param {String} srcUrl the url to start with\n * @param {Boolean} withCredentials the withCredentials xhr option\n * @constructor\n */\n\n\nvar PlaylistLoader = function (_EventTarget) {\n  inherits(PlaylistLoader, _EventTarget);\n\n  function PlaylistLoader(srcUrl, hls) {\n    var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};\n    classCallCheck(this, PlaylistLoader);\n\n    var _this = possibleConstructorReturn(this, (PlaylistLoader.__proto__ || Object.getPrototypeOf(PlaylistLoader)).call(this));\n\n    var _options$withCredenti = options.withCredentials,\n        withCredentials = _options$withCredenti === undefined ? false : _options$withCredenti,\n        _options$handleManife = options.handleManifestRedirects,\n        handleManifestRedirects = _options$handleManife === undefined ? false : _options$handleManife;\n    _this.srcUrl = srcUrl;\n    _this.hls_ = hls;\n    _this.withCredentials = withCredentials;\n    _this.handleManifestRedirects = handleManifestRedirects;\n    var hlsOptions = hls.options_;\n    _this.customTagParsers = hlsOptions && hlsOptions.customTagParsers || [];\n    _this.customTagMappers = hlsOptions && hlsOptions.customTagMappers || [];\n\n    if (!_this.srcUrl) {\n      throw new Error('A non-empty playlist URL is required');\n    } // initialize the loader state\n\n\n    _this.state = 'HAVE_NOTHING'; // live playlist staleness timeout\n\n    _this.on('mediaupdatetimeout', function () {\n      if (_this.state !== 'HAVE_METADATA') {\n        // only refresh the media playlist if no other activity is going on\n        return;\n      }\n\n      _this.state = 'HAVE_CURRENT_METADATA';\n      _this.request = _this.hls_.xhr({\n        uri: resolveUrl(_this.master.uri, _this.media().uri),\n        withCredentials: _this.withCredentials\n      }, function (error, req) {\n        // disposed\n        if (!_this.request) {\n          return;\n        }\n\n        if (error) {\n          return _this.playlistRequestError(_this.request, _this.media().uri, 'HAVE_METADATA');\n        }\n\n        _this.haveMetadata(_this.request, _this.media().uri);\n      });\n    });\n\n    return _this;\n  }\n\n  createClass(PlaylistLoader, [{\n    key: 'playlistRequestError',\n    value: function playlistRequestError(xhr, url, startingState) {\n      // any in-flight request is now finished\n      this.request = null;\n\n      if (startingState) {\n        this.state = startingState;\n      }\n\n      this.error = {\n        playlist: this.master.playlists[url],\n        status: xhr.status,\n        message: 'HLS playlist request error at URL: ' + url + '.',\n        responseText: xhr.responseText,\n        code: xhr.status >= 500 ? 4 : 2\n      };\n      this.trigger('error');\n    } // update the playlist loader's state in response to a new or\n    // updated playlist.\n\n  }, {\n    key: 'haveMetadata',\n    value: function haveMetadata(xhr, url) {\n      var _this2 = this; // any in-flight request is now finished\n\n\n      this.request = null;\n      this.state = 'HAVE_METADATA';\n      var parser = new Parser(); // adding custom tag parsers\n\n      this.customTagParsers.forEach(function (customParser) {\n        return parser.addParser(customParser);\n      }); // adding custom tag mappers\n\n      this.customTagMappers.forEach(function (mapper) {\n        return parser.addTagMapper(mapper);\n      });\n      parser.push(xhr.responseText);\n      parser.end();\n      parser.manifest.uri = url; // m3u8-parser does not attach an attributes property to media playlists so make\n      // sure that the property is attached to avoid undefined reference errors\n\n      parser.manifest.attributes = parser.manifest.attributes || {}; // merge this playlist into the master\n\n      var update = updateMaster(this.master, parser.manifest);\n      this.targetDuration = parser.manifest.targetDuration;\n\n      if (update) {\n        this.master = update;\n        this.media_ = this.master.playlists[parser.manifest.uri];\n      } else {\n        this.trigger('playlistunchanged');\n      } // refresh live playlists after a target duration passes\n\n\n      if (!this.media().endList) {\n        window$1.clearTimeout(this.mediaUpdateTimeout);\n        this.mediaUpdateTimeout = window$1.setTimeout(function () {\n          _this2.trigger('mediaupdatetimeout');\n        }, refreshDelay(this.media(), !!update));\n      }\n\n      this.trigger('loadedplaylist');\n    }\n    /**\n     * Abort any outstanding work and clean up.\n     */\n\n  }, {\n    key: 'dispose',\n    value: function dispose() {\n      this.stopRequest();\n      window$1.clearTimeout(this.mediaUpdateTimeout);\n      window$1.clearTimeout(this.finalRenditionTimeout);\n    }\n  }, {\n    key: 'stopRequest',\n    value: function stopRequest() {\n      if (this.request) {\n        var oldRequest = this.request;\n        this.request = null;\n        oldRequest.onreadystatechange = null;\n        oldRequest.abort();\n      }\n    }\n    /**\n     * When called without any arguments, returns the currently\n     * active media playlist. When called with a single argument,\n     * triggers the playlist loader to asynchronously switch to the\n     * specified media playlist. Calling this method while the\n     * loader is in the HAVE_NOTHING causes an error to be emitted\n     * but otherwise has no effect.\n     *\n     * @param {Object=} playlist the parsed media playlist\n     * object to switch to\n     * @param {Boolean=} is this the last available playlist\n     *\n     * @return {Playlist} the current loaded media\n     */\n\n  }, {\n    key: 'media',\n    value: function media(playlist, isFinalRendition) {\n      var _this3 = this; // getter\n\n\n      if (!playlist) {\n        return this.media_;\n      } // setter\n\n\n      if (this.state === 'HAVE_NOTHING') {\n        throw new Error('Cannot switch media playlist from ' + this.state);\n      } // find the playlist object if the target playlist has been\n      // specified by URI\n\n\n      if (typeof playlist === 'string') {\n        if (!this.master.playlists[playlist]) {\n          throw new Error('Unknown playlist URI: ' + playlist);\n        }\n\n        playlist = this.master.playlists[playlist];\n      }\n\n      window$1.clearTimeout(this.finalRenditionTimeout);\n\n      if (isFinalRendition) {\n        var delay = playlist.targetDuration / 2 * 1000 || 5 * 1000;\n        this.finalRenditionTimeout = window$1.setTimeout(this.media.bind(this, playlist, false), delay);\n        return;\n      }\n\n      var startingState = this.state;\n      var mediaChange = !this.media_ || playlist.uri !== this.media_.uri; // switch to fully loaded playlists immediately\n\n      if (this.master.playlists[playlist.uri].endList) {\n        // abort outstanding playlist requests\n        if (this.request) {\n          this.request.onreadystatechange = null;\n          this.request.abort();\n          this.request = null;\n        }\n\n        this.state = 'HAVE_METADATA';\n        this.media_ = playlist; // trigger media change if the active media has been updated\n\n        if (mediaChange) {\n          this.trigger('mediachanging');\n          this.trigger('mediachange');\n        }\n\n        return;\n      } // switching to the active playlist is a no-op\n\n\n      if (!mediaChange) {\n        return;\n      }\n\n      this.state = 'SWITCHING_MEDIA'; // there is already an outstanding playlist request\n\n      if (this.request) {\n        if (playlist.resolvedUri === this.request.url) {\n          // requesting to switch to the same playlist multiple times\n          // has no effect after the first\n          return;\n        }\n\n        this.request.onreadystatechange = null;\n        this.request.abort();\n        this.request = null;\n      } // request the new playlist\n\n\n      if (this.media_) {\n        this.trigger('mediachanging');\n      }\n\n      this.request = this.hls_.xhr({\n        uri: playlist.resolvedUri,\n        withCredentials: this.withCredentials\n      }, function (error, req) {\n        // disposed\n        if (!_this3.request) {\n          return;\n        }\n\n        playlist.resolvedUri = resolveManifestRedirect(_this3.handleManifestRedirects, playlist.resolvedUri, req);\n\n        if (error) {\n          return _this3.playlistRequestError(_this3.request, playlist.uri, startingState);\n        }\n\n        _this3.haveMetadata(req, playlist.uri); // fire loadedmetadata the first time a media playlist is loaded\n\n\n        if (startingState === 'HAVE_MASTER') {\n          _this3.trigger('loadedmetadata');\n        } else {\n          _this3.trigger('mediachange');\n        }\n      });\n    }\n    /**\n     * pause loading of the playlist\n     */\n\n  }, {\n    key: 'pause',\n    value: function pause() {\n      this.stopRequest();\n      window$1.clearTimeout(this.mediaUpdateTimeout);\n\n      if (this.state === 'HAVE_NOTHING') {\n        // If we pause the loader before any data has been retrieved, its as if we never\n        // started, so reset to an unstarted state.\n        this.started = false;\n      } // Need to restore state now that no activity is happening\n\n\n      if (this.state === 'SWITCHING_MEDIA') {\n        // if the loader was in the process of switching media, it should either return to\n        // HAVE_MASTER or HAVE_METADATA depending on if the loader has loaded a media\n        // playlist yet. This is determined by the existence of loader.media_\n        if (this.media_) {\n          this.state = 'HAVE_METADATA';\n        } else {\n          this.state = 'HAVE_MASTER';\n        }\n      } else if (this.state === 'HAVE_CURRENT_METADATA') {\n        this.state = 'HAVE_METADATA';\n      }\n    }\n    /**\n     * start loading of the playlist\n     */\n\n  }, {\n    key: 'load',\n    value: function load(isFinalRendition) {\n      var _this4 = this;\n\n      window$1.clearTimeout(this.mediaUpdateTimeout);\n      var media = this.media();\n\n      if (isFinalRendition) {\n        var delay = media ? media.targetDuration / 2 * 1000 : 5 * 1000;\n        this.mediaUpdateTimeout = window$1.setTimeout(function () {\n          return _this4.load();\n        }, delay);\n        return;\n      }\n\n      if (!this.started) {\n        this.start();\n        return;\n      }\n\n      if (media && !media.endList) {\n        this.trigger('mediaupdatetimeout');\n      } else {\n        this.trigger('loadedplaylist');\n      }\n    }\n    /**\n     * start loading of the playlist\n     */\n\n  }, {\n    key: 'start',\n    value: function start() {\n      var _this5 = this;\n\n      this.started = true; // request the specified URL\n\n      this.request = this.hls_.xhr({\n        uri: this.srcUrl,\n        withCredentials: this.withCredentials\n      }, function (error, req) {\n        // disposed\n        if (!_this5.request) {\n          return;\n        } // clear the loader's request reference\n\n\n        _this5.request = null;\n\n        if (error) {\n          _this5.error = {\n            status: req.status,\n            message: 'HLS playlist request error at URL: ' + _this5.srcUrl + '.',\n            responseText: req.responseText,\n            // MEDIA_ERR_NETWORK\n            code: 2\n          };\n\n          if (_this5.state === 'HAVE_NOTHING') {\n            _this5.started = false;\n          }\n\n          return _this5.trigger('error');\n        }\n\n        var parser = new Parser(); // adding custom tag parsers\n\n        _this5.customTagParsers.forEach(function (customParser) {\n          return parser.addParser(customParser);\n        }); // adding custom tag mappers\n\n\n        _this5.customTagMappers.forEach(function (mapper) {\n          return parser.addTagMapper(mapper);\n        });\n\n        parser.push(req.responseText);\n        parser.end();\n        _this5.state = 'HAVE_MASTER';\n        _this5.srcUrl = resolveManifestRedirect(_this5.handleManifestRedirects, _this5.srcUrl, req);\n        parser.manifest.uri = _this5.srcUrl; // loaded a master playlist\n\n        if (parser.manifest.playlists) {\n          _this5.master = parser.manifest;\n          setupMediaPlaylists(_this5.master);\n          resolveMediaGroupUris(_this5.master);\n\n          _this5.trigger('loadedplaylist');\n\n          if (!_this5.request) {\n            // no media playlist was specifically selected so start\n            // from the first listed one\n            _this5.media(parser.manifest.playlists[0]);\n          }\n\n          return;\n        } // loaded a media playlist\n        // infer a master playlist if none was previously requested\n\n\n        _this5.master = {\n          mediaGroups: {\n            'AUDIO': {},\n            'VIDEO': {},\n            'CLOSED-CAPTIONS': {},\n            'SUBTITLES': {}\n          },\n          uri: window$1.location.href,\n          playlists: [{\n            uri: _this5.srcUrl,\n            id: 0,\n            resolvedUri: _this5.srcUrl,\n            // m3u8-parser does not attach an attributes property to media playlists so make\n            // sure that the property is attached to avoid undefined reference errors\n            attributes: {}\n          }]\n        };\n        _this5.master.playlists[_this5.srcUrl] = _this5.master.playlists[0];\n\n        _this5.haveMetadata(req, _this5.srcUrl);\n\n        return _this5.trigger('loadedmetadata');\n      });\n    }\n  }]);\n  return PlaylistLoader;\n}(EventTarget$1);\n/**\n * @file playlist.js\n *\n * Playlist related utilities.\n */\n\n\nvar createTimeRange = videojs$1.createTimeRange;\n/**\n * walk backward until we find a duration we can use\n * or return a failure\n *\n * @param {Playlist} playlist the playlist to walk through\n * @param {Number} endSequence the mediaSequence to stop walking on\n */\n\nvar backwardDuration = function backwardDuration(playlist, endSequence) {\n  var result = 0;\n  var i = endSequence - playlist.mediaSequence; // if a start time is available for segment immediately following\n  // the interval, use it\n\n  var segment = playlist.segments[i]; // Walk backward until we find the latest segment with timeline\n  // information that is earlier than endSequence\n\n  if (segment) {\n    if (typeof segment.start !== 'undefined') {\n      return {\n        result: segment.start,\n        precise: true\n      };\n    }\n\n    if (typeof segment.end !== 'undefined') {\n      return {\n        result: segment.end - segment.duration,\n        precise: true\n      };\n    }\n  }\n\n  while (i--) {\n    segment = playlist.segments[i];\n\n    if (typeof segment.end !== 'undefined') {\n      return {\n        result: result + segment.end,\n        precise: true\n      };\n    }\n\n    result += segment.duration;\n\n    if (typeof segment.start !== 'undefined') {\n      return {\n        result: result + segment.start,\n        precise: true\n      };\n    }\n  }\n\n  return {\n    result: result,\n    precise: false\n  };\n};\n/**\n * walk forward until we find a duration we can use\n * or return a failure\n *\n * @param {Playlist} playlist the playlist to walk through\n * @param {Number} endSequence the mediaSequence to stop walking on\n */\n\n\nvar forwardDuration = function forwardDuration(playlist, endSequence) {\n  var result = 0;\n  var segment = void 0;\n  var i = endSequence - playlist.mediaSequence; // Walk forward until we find the earliest segment with timeline\n  // information\n\n  for (; i < playlist.segments.length; i++) {\n    segment = playlist.segments[i];\n\n    if (typeof segment.start !== 'undefined') {\n      return {\n        result: segment.start - result,\n        precise: true\n      };\n    }\n\n    result += segment.duration;\n\n    if (typeof segment.end !== 'undefined') {\n      return {\n        result: segment.end - result,\n        precise: true\n      };\n    }\n  } // indicate we didn't find a useful duration estimate\n\n\n  return {\n    result: -1,\n    precise: false\n  };\n};\n/**\n  * Calculate the media duration from the segments associated with a\n  * playlist. The duration of a subinterval of the available segments\n  * may be calculated by specifying an end index.\n  *\n  * @param {Object} playlist a media playlist object\n  * @param {Number=} endSequence an exclusive upper boundary\n  * for the playlist.  Defaults to playlist length.\n  * @param {Number} expired the amount of time that has dropped\n  * off the front of the playlist in a live scenario\n  * @return {Number} the duration between the first available segment\n  * and end index.\n  */\n\n\nvar intervalDuration = function intervalDuration(playlist, endSequence, expired) {\n  var backward = void 0;\n  var forward = void 0;\n\n  if (typeof endSequence === 'undefined') {\n    endSequence = playlist.mediaSequence + playlist.segments.length;\n  }\n\n  if (endSequence < playlist.mediaSequence) {\n    return 0;\n  } // do a backward walk to estimate the duration\n\n\n  backward = backwardDuration(playlist, endSequence);\n\n  if (backward.precise) {\n    // if we were able to base our duration estimate on timing\n    // information provided directly from the Media Source, return\n    // it\n    return backward.result;\n  } // walk forward to see if a precise duration estimate can be made\n  // that way\n\n\n  forward = forwardDuration(playlist, endSequence);\n\n  if (forward.precise) {\n    // we found a segment that has been buffered and so it's\n    // position is known precisely\n    return forward.result;\n  } // return the less-precise, playlist-based duration estimate\n\n\n  return backward.result + expired;\n};\n/**\n  * Calculates the duration of a playlist. If a start and end index\n  * are specified, the duration will be for the subset of the media\n  * timeline between those two indices. The total duration for live\n  * playlists is always Infinity.\n  *\n  * @param {Object} playlist a media playlist object\n  * @param {Number=} endSequence an exclusive upper\n  * boundary for the playlist. Defaults to the playlist media\n  * sequence number plus its length.\n  * @param {Number=} expired the amount of time that has\n  * dropped off the front of the playlist in a live scenario\n  * @return {Number} the duration between the start index and end\n  * index.\n  */\n\n\nvar duration = function duration(playlist, endSequence, expired) {\n  if (!playlist) {\n    return 0;\n  }\n\n  if (typeof expired !== 'number') {\n    expired = 0;\n  } // if a slice of the total duration is not requested, use\n  // playlist-level duration indicators when they're present\n\n\n  if (typeof endSequence === 'undefined') {\n    // if present, use the duration specified in the playlist\n    if (playlist.totalDuration) {\n      return playlist.totalDuration;\n    } // duration should be Infinity for live playlists\n\n\n    if (!playlist.endList) {\n      return window$1.Infinity;\n    }\n  } // calculate the total duration based on the segment durations\n\n\n  return intervalDuration(playlist, endSequence, expired);\n};\n/**\n  * Calculate the time between two indexes in the current playlist\n  * neight the start- nor the end-index need to be within the current\n  * playlist in which case, the targetDuration of the playlist is used\n  * to approximate the durations of the segments\n  *\n  * @param {Object} playlist a media playlist object\n  * @param {Number} startIndex\n  * @param {Number} endIndex\n  * @return {Number} the number of seconds between startIndex and endIndex\n  */\n\n\nvar sumDurations = function sumDurations(playlist, startIndex, endIndex) {\n  var durations = 0;\n\n  if (startIndex > endIndex) {\n    var _ref = [endIndex, startIndex];\n    startIndex = _ref[0];\n    endIndex = _ref[1];\n  }\n\n  if (startIndex < 0) {\n    for (var i = startIndex; i < Math.min(0, endIndex); i++) {\n      durations += playlist.targetDuration;\n    }\n\n    startIndex = 0;\n  }\n\n  for (var _i = startIndex; _i < endIndex; _i++) {\n    durations += playlist.segments[_i].duration;\n  }\n\n  return durations;\n};\n/**\n * Determines the media index of the segment corresponding to the safe edge of the live\n * window which is the duration of the last segment plus 2 target durations from the end\n * of the playlist.\n *\n * @param {Object} playlist\n *        a media playlist object\n * @return {Number}\n *         The media index of the segment at the safe live point. 0 if there is no \"safe\"\n *         point.\n * @function safeLiveIndex\n */\n\n\nvar safeLiveIndex = function safeLiveIndex(playlist) {\n  if (!playlist.segments.length) {\n    return 0;\n  }\n\n  var i = playlist.segments.length - 1;\n  var distanceFromEnd = playlist.segments[i].duration || playlist.targetDuration;\n  var safeDistance = distanceFromEnd + playlist.targetDuration * 2;\n\n  while (i--) {\n    distanceFromEnd += playlist.segments[i].duration;\n\n    if (distanceFromEnd >= safeDistance) {\n      break;\n    }\n  }\n\n  return Math.max(0, i);\n};\n/**\n * Calculates the playlist end time\n *\n * @param {Object} playlist a media playlist object\n * @param {Number=} expired the amount of time that has\n *                  dropped off the front of the playlist in a live scenario\n * @param {Boolean|false} useSafeLiveEnd a boolean value indicating whether or not the\n *                        playlist end calculation should consider the safe live end\n *                        (truncate the playlist end by three segments). This is normally\n *                        used for calculating the end of the playlist's seekable range.\n * @returns {Number} the end time of playlist\n * @function playlistEnd\n */\n\n\nvar playlistEnd = function playlistEnd(playlist, expired, useSafeLiveEnd) {\n  if (!playlist || !playlist.segments) {\n    return null;\n  }\n\n  if (playlist.endList) {\n    return duration(playlist);\n  }\n\n  if (expired === null) {\n    return null;\n  }\n\n  expired = expired || 0;\n  var endSequence = useSafeLiveEnd ? safeLiveIndex(playlist) : playlist.segments.length;\n  return intervalDuration(playlist, playlist.mediaSequence + endSequence, expired);\n};\n/**\n  * Calculates the interval of time that is currently seekable in a\n  * playlist. The returned time ranges are relative to the earliest\n  * moment in the specified playlist that is still available. A full\n  * seekable implementation for live streams would need to offset\n  * these values by the duration of content that has expired from the\n  * stream.\n  *\n  * @param {Object} playlist a media playlist object\n  * dropped off the front of the playlist in a live scenario\n  * @param {Number=} expired the amount of time that has\n  * dropped off the front of the playlist in a live scenario\n  * @return {TimeRanges} the periods of time that are valid targets\n  * for seeking\n  */\n\n\nvar seekable = function seekable(playlist, expired) {\n  var useSafeLiveEnd = true;\n  var seekableStart = expired || 0;\n  var seekableEnd = playlistEnd(playlist, expired, useSafeLiveEnd);\n\n  if (seekableEnd === null) {\n    return createTimeRange();\n  }\n\n  return createTimeRange(seekableStart, seekableEnd);\n};\n\nvar isWholeNumber = function isWholeNumber(num) {\n  return num - Math.floor(num) === 0;\n};\n\nvar roundSignificantDigit = function roundSignificantDigit(increment, num) {\n  // If we have a whole number, just add 1 to it\n  if (isWholeNumber(num)) {\n    return num + increment * 0.1;\n  }\n\n  var numDecimalDigits = num.toString().split('.')[1].length;\n\n  for (var i = 1; i <= numDecimalDigits; i++) {\n    var scale = Math.pow(10, i);\n    var temp = num * scale;\n\n    if (isWholeNumber(temp) || i === numDecimalDigits) {\n      return (temp + increment) / scale;\n    }\n  }\n};\n\nvar ceilLeastSignificantDigit = roundSignificantDigit.bind(null, 1);\nvar floorLeastSignificantDigit = roundSignificantDigit.bind(null, -1);\n/**\n * Determine the index and estimated starting time of the segment that\n * contains a specified playback position in a media playlist.\n *\n * @param {Object} playlist the media playlist to query\n * @param {Number} currentTime The number of seconds since the earliest\n * possible position to determine the containing segment for\n * @param {Number} startIndex\n * @param {Number} startTime\n * @return {Object}\n */\n\nvar getMediaInfoForTime = function getMediaInfoForTime(playlist, currentTime, startIndex, startTime) {\n  var i = void 0;\n  var segment = void 0;\n  var numSegments = playlist.segments.length;\n  var time = currentTime - startTime;\n\n  if (time < 0) {\n    // Walk backward from startIndex in the playlist, adding durations\n    // until we find a segment that contains `time` and return it\n    if (startIndex > 0) {\n      for (i = startIndex - 1; i >= 0; i--) {\n        segment = playlist.segments[i];\n        time += floorLeastSignificantDigit(segment.duration);\n\n        if (time > 0) {\n          return {\n            mediaIndex: i,\n            startTime: startTime - sumDurations(playlist, startIndex, i)\n          };\n        }\n      }\n    } // We were unable to find a good segment within the playlist\n    // so select the first segment\n\n\n    return {\n      mediaIndex: 0,\n      startTime: currentTime\n    };\n  } // When startIndex is negative, we first walk forward to first segment\n  // adding target durations. If we \"run out of time\" before getting to\n  // the first segment, return the first segment\n\n\n  if (startIndex < 0) {\n    for (i = startIndex; i < 0; i++) {\n      time -= playlist.targetDuration;\n\n      if (time < 0) {\n        return {\n          mediaIndex: 0,\n          startTime: currentTime\n        };\n      }\n    }\n\n    startIndex = 0;\n  } // Walk forward from startIndex in the playlist, subtracting durations\n  // until we find a segment that contains `time` and return it\n\n\n  for (i = startIndex; i < numSegments; i++) {\n    segment = playlist.segments[i];\n    time -= ceilLeastSignificantDigit(segment.duration);\n\n    if (time < 0) {\n      return {\n        mediaIndex: i,\n        startTime: startTime + sumDurations(playlist, startIndex, i)\n      };\n    }\n  } // We are out of possible candidates so load the last one...\n\n\n  return {\n    mediaIndex: numSegments - 1,\n    startTime: currentTime\n  };\n};\n/**\n * Check whether the playlist is blacklisted or not.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is blacklisted or not\n * @function isBlacklisted\n */\n\n\nvar isBlacklisted = function isBlacklisted(playlist) {\n  return playlist.excludeUntil && playlist.excludeUntil > Date.now();\n};\n/**\n * Check whether the playlist is compatible with current playback configuration or has\n * been blacklisted permanently for being incompatible.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is incompatible or not\n * @function isIncompatible\n */\n\n\nvar isIncompatible = function isIncompatible(playlist) {\n  return playlist.excludeUntil && playlist.excludeUntil === Infinity;\n};\n/**\n * Check whether the playlist is enabled or not.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is enabled or not\n * @function isEnabled\n */\n\n\nvar isEnabled = function isEnabled(playlist) {\n  var blacklisted = isBlacklisted(playlist);\n  return !playlist.disabled && !blacklisted;\n};\n/**\n * Check whether the playlist has been manually disabled through the representations api.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is disabled manually or not\n * @function isDisabled\n */\n\n\nvar isDisabled = function isDisabled(playlist) {\n  return playlist.disabled;\n};\n/**\n * Returns whether the current playlist is an AES encrypted HLS stream\n *\n * @return {Boolean} true if it's an AES encrypted HLS stream\n */\n\n\nvar isAes = function isAes(media) {\n  for (var i = 0; i < media.segments.length; i++) {\n    if (media.segments[i].key) {\n      return true;\n    }\n  }\n\n  return false;\n};\n/**\n * Returns whether the current playlist contains fMP4\n *\n * @return {Boolean} true if the playlist contains fMP4\n */\n\n\nvar isFmp4 = function isFmp4(media) {\n  for (var i = 0; i < media.segments.length; i++) {\n    if (media.segments[i].map) {\n      return true;\n    }\n  }\n\n  return false;\n};\n/**\n * Checks if the playlist has a value for the specified attribute\n *\n * @param {String} attr\n *        Attribute to check for\n * @param {Object} playlist\n *        The media playlist object\n * @return {Boolean}\n *         Whether the playlist contains a value for the attribute or not\n * @function hasAttribute\n */\n\n\nvar hasAttribute = function hasAttribute(attr, playlist) {\n  return playlist.attributes && playlist.attributes[attr];\n};\n/**\n * Estimates the time required to complete a segment download from the specified playlist\n *\n * @param {Number} segmentDuration\n *        Duration of requested segment\n * @param {Number} bandwidth\n *        Current measured bandwidth of the player\n * @param {Object} playlist\n *        The media playlist object\n * @param {Number=} bytesReceived\n *        Number of bytes already received for the request. Defaults to 0\n * @return {Number|NaN}\n *         The estimated time to request the segment. NaN if bandwidth information for\n *         the given playlist is unavailable\n * @function estimateSegmentRequestTime\n */\n\n\nvar estimateSegmentRequestTime = function estimateSegmentRequestTime(segmentDuration, bandwidth, playlist) {\n  var bytesReceived = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 0;\n\n  if (!hasAttribute('BANDWIDTH', playlist)) {\n    return NaN;\n  }\n\n  var size = segmentDuration * playlist.attributes.BANDWIDTH;\n  return (size - bytesReceived * 8) / bandwidth;\n};\n/*\n * Returns whether the current playlist is the lowest rendition\n *\n * @return {Boolean} true if on lowest rendition\n */\n\n\nvar isLowestEnabledRendition = function isLowestEnabledRendition(master, media) {\n  if (master.playlists.length === 1) {\n    return true;\n  }\n\n  var currentBandwidth = media.attributes.BANDWIDTH || Number.MAX_VALUE;\n  return master.playlists.filter(function (playlist) {\n    if (!isEnabled(playlist)) {\n      return false;\n    }\n\n    return (playlist.attributes.BANDWIDTH || 0) < currentBandwidth;\n  }).length === 0;\n}; // exports\n\n\nvar Playlist = {\n  duration: duration,\n  seekable: seekable,\n  safeLiveIndex: safeLiveIndex,\n  getMediaInfoForTime: getMediaInfoForTime,\n  isEnabled: isEnabled,\n  isDisabled: isDisabled,\n  isBlacklisted: isBlacklisted,\n  isIncompatible: isIncompatible,\n  playlistEnd: playlistEnd,\n  isAes: isAes,\n  isFmp4: isFmp4,\n  hasAttribute: hasAttribute,\n  estimateSegmentRequestTime: estimateSegmentRequestTime,\n  isLowestEnabledRendition: isLowestEnabledRendition\n};\n/**\n * @file xhr.js\n */\n\nvar videojsXHR = videojs$1.xhr,\n    mergeOptions$1$1 = videojs$1.mergeOptions;\n\nvar xhrFactory = function xhrFactory() {\n  var xhr = function XhrFunction(options, callback) {\n    // Add a default timeout for all hls requests\n    options = mergeOptions$1$1({\n      timeout: 45e3\n    }, options); // Allow an optional user-specified function to modify the option\n    // object before we construct the xhr request\n\n    var beforeRequest = XhrFunction.beforeRequest || videojs$1.Hls.xhr.beforeRequest;\n\n    if (beforeRequest && typeof beforeRequest === 'function') {\n      var newOptions = beforeRequest(options);\n\n      if (newOptions) {\n        options = newOptions;\n      }\n    }\n\n    var request = videojsXHR(options, function (error, response) {\n      var reqResponse = request.response;\n\n      if (!error && reqResponse) {\n        request.responseTime = Date.now();\n        request.roundTripTime = request.responseTime - request.requestTime;\n        request.bytesReceived = reqResponse.byteLength || reqResponse.length;\n\n        if (!request.bandwidth) {\n          request.bandwidth = Math.floor(request.bytesReceived / request.roundTripTime * 8 * 1000);\n        }\n      }\n\n      if (response.headers) {\n        request.responseHeaders = response.headers;\n      } // videojs.xhr now uses a specific code on the error\n      // object to signal that a request has timed out instead\n      // of setting a boolean on the request object\n\n\n      if (error && error.code === 'ETIMEDOUT') {\n        request.timedout = true;\n      } // videojs.xhr no longer considers status codes outside of 200 and 0\n      // (for file uris) to be errors, but the old XHR did, so emulate that\n      // behavior. Status 206 may be used in response to byterange requests.\n\n\n      if (!error && !request.aborted && response.statusCode !== 200 && response.statusCode !== 206 && response.statusCode !== 0) {\n        error = new Error('XHR Failed with a response of: ' + (request && (reqResponse || request.responseText)));\n      }\n\n      callback(error, request);\n    });\n    var originalAbort = request.abort;\n\n    request.abort = function () {\n      request.aborted = true;\n      return originalAbort.apply(request, arguments);\n    };\n\n    request.uri = options.uri;\n    request.requestTime = Date.now();\n    return request;\n  };\n\n  return xhr;\n};\n/**\n * Turns segment byterange into a string suitable for use in\n * HTTP Range requests\n *\n * @param {Object} byterange - an object with two values defining the start and end\n *                             of a byte-range\n */\n\n\nvar byterangeStr = function byterangeStr(byterange) {\n  var byterangeStart = void 0;\n  var byterangeEnd = void 0; // `byterangeEnd` is one less than `offset + length` because the HTTP range\n  // header uses inclusive ranges\n\n  byterangeEnd = byterange.offset + byterange.length - 1;\n  byterangeStart = byterange.offset;\n  return 'bytes=' + byterangeStart + '-' + byterangeEnd;\n};\n/**\n * Defines headers for use in the xhr request for a particular segment.\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n */\n\n\nvar segmentXhrHeaders = function segmentXhrHeaders(segment) {\n  var headers = {};\n\n  if (segment.byterange) {\n    headers.Range = byterangeStr(segment.byterange);\n  }\n\n  return headers;\n};\n/**\n * @file bin-utils.js\n */\n\n/**\n * convert a TimeRange to text\n *\n * @param {TimeRange} range the timerange to use for conversion\n * @param {Number} i the iterator on the range to convert\n */\n\n\nvar textRange = function textRange(range, i) {\n  return range.start(i) + '-' + range.end(i);\n};\n/**\n * format a number as hex string\n *\n * @param {Number} e The number\n * @param {Number} i the iterator\n */\n\n\nvar formatHexString = function formatHexString(e, i) {\n  var value = e.toString(16);\n  return '00'.substring(0, 2 - value.length) + value + (i % 2 ? ' ' : '');\n};\n\nvar formatAsciiString = function formatAsciiString(e) {\n  if (e >= 0x20 && e < 0x7e) {\n    return String.fromCharCode(e);\n  }\n\n  return '.';\n};\n/**\n * Creates an object for sending to a web worker modifying properties that are TypedArrays\n * into a new object with seperated properties for the buffer, byteOffset, and byteLength.\n *\n * @param {Object} message\n *        Object of properties and values to send to the web worker\n * @return {Object}\n *         Modified message with TypedArray values expanded\n * @function createTransferableMessage\n */\n\n\nvar createTransferableMessage = function createTransferableMessage(message) {\n  var transferable = {};\n  Object.keys(message).forEach(function (key) {\n    var value = message[key];\n\n    if (ArrayBuffer.isView(value)) {\n      transferable[key] = {\n        bytes: value.buffer,\n        byteOffset: value.byteOffset,\n        byteLength: value.byteLength\n      };\n    } else {\n      transferable[key] = value;\n    }\n  });\n  return transferable;\n};\n/**\n * Returns a unique string identifier for a media initialization\n * segment.\n */\n\n\nvar initSegmentId = function initSegmentId(initSegment) {\n  var byterange = initSegment.byterange || {\n    length: Infinity,\n    offset: 0\n  };\n  return [byterange.length, byterange.offset, initSegment.resolvedUri].join(',');\n};\n/**\n * Returns a unique string identifier for a media segment key.\n */\n\n\nvar segmentKeyId = function segmentKeyId(key) {\n  return key.resolvedUri;\n};\n/**\n * utils to help dump binary data to the console\n */\n\n\nvar hexDump = function hexDump(data) {\n  var bytes = Array.prototype.slice.call(data);\n  var step = 16;\n  var result = '';\n  var hex = void 0;\n  var ascii = void 0;\n\n  for (var j = 0; j < bytes.length / step; j++) {\n    hex = bytes.slice(j * step, j * step + step).map(formatHexString).join('');\n    ascii = bytes.slice(j * step, j * step + step).map(formatAsciiString).join('');\n    result += hex + ' ' + ascii + '\\n';\n  }\n\n  return result;\n};\n\nvar tagDump = function tagDump(_ref) {\n  var bytes = _ref.bytes;\n  return hexDump(bytes);\n};\n\nvar textRanges = function textRanges(ranges) {\n  var result = '';\n  var i = void 0;\n\n  for (i = 0; i < ranges.length; i++) {\n    result += textRange(ranges, i) + ' ';\n  }\n\n  return result;\n};\n\nvar utils =\n/*#__PURE__*/\nObject.freeze({\n  createTransferableMessage: createTransferableMessage,\n  initSegmentId: initSegmentId,\n  segmentKeyId: segmentKeyId,\n  hexDump: hexDump,\n  tagDump: tagDump,\n  textRanges: textRanges\n}); // TODO handle fmp4 case where the timing info is accurate and doesn't involve transmux\n// Add 25% to the segment duration to account for small discrepencies in segment timing.\n// 25% was arbitrarily chosen, and may need to be refined over time.\n\nvar SEGMENT_END_FUDGE_PERCENT = 0.25;\n/**\n * Converts a player time (any time that can be gotten/set from player.currentTime(),\n * e.g., any time within player.seekable().start(0) to player.seekable().end(0)) to a\n * program time (any time referencing the real world (e.g., EXT-X-PROGRAM-DATE-TIME)).\n *\n * The containing segment is required as the EXT-X-PROGRAM-DATE-TIME serves as an \"anchor\n * point\" (a point where we have a mapping from program time to player time, with player\n * time being the post transmux start of the segment).\n *\n * For more details, see [this doc](../../docs/program-time-from-player-time.md).\n *\n * @param {Number} playerTime the player time\n * @param {Object} segment the segment which contains the player time\n * @return {Date} program time\n */\n\nvar playerTimeToProgramTime = function playerTimeToProgramTime(playerTime, segment) {\n  if (!segment.dateTimeObject) {\n    // Can't convert without an \"anchor point\" for the program time (i.e., a time that can\n    // be used to map the start of a segment with a real world time).\n    return null;\n  }\n\n  var transmuxerPrependedSeconds = segment.videoTimingInfo.transmuxerPrependedSeconds;\n  var transmuxedStart = segment.videoTimingInfo.transmuxedPresentationStart; // get the start of the content from before old content is prepended\n\n  var startOfSegment = transmuxedStart + transmuxerPrependedSeconds;\n  var offsetFromSegmentStart = playerTime - startOfSegment;\n  return new Date(segment.dateTimeObject.getTime() + offsetFromSegmentStart * 1000);\n};\n\nvar originalSegmentVideoDuration = function originalSegmentVideoDuration(videoTimingInfo) {\n  return videoTimingInfo.transmuxedPresentationEnd - videoTimingInfo.transmuxedPresentationStart - videoTimingInfo.transmuxerPrependedSeconds;\n};\n/**\n * Finds a segment that contains the time requested given as an ISO-8601 string. The\n * returned segment might be an estimate or an accurate match.\n *\n * @param {String} programTime The ISO-8601 programTime to find a match for\n * @param {Object} playlist A playlist object to search within\n */\n\n\nvar findSegmentForProgramTime = function findSegmentForProgramTime(programTime, playlist) {\n  // Assumptions:\n  //  - verifyProgramDateTimeTags has already been run\n  //  - live streams have been started\n  var dateTimeObject = void 0;\n\n  try {\n    dateTimeObject = new Date(programTime);\n  } catch (e) {\n    return null;\n  }\n\n  if (!playlist || !playlist.segments || playlist.segments.length === 0) {\n    return null;\n  }\n\n  var segment = playlist.segments[0];\n\n  if (dateTimeObject < segment.dateTimeObject) {\n    // Requested time is before stream start.\n    return null;\n  }\n\n  for (var i = 0; i < playlist.segments.length - 1; i++) {\n    segment = playlist.segments[i];\n    var nextSegmentStart = playlist.segments[i + 1].dateTimeObject;\n\n    if (dateTimeObject < nextSegmentStart) {\n      break;\n    }\n  }\n\n  var lastSegment = playlist.segments[playlist.segments.length - 1];\n  var lastSegmentStart = lastSegment.dateTimeObject;\n  var lastSegmentDuration = lastSegment.videoTimingInfo ? originalSegmentVideoDuration(lastSegment.videoTimingInfo) : lastSegment.duration + lastSegment.duration * SEGMENT_END_FUDGE_PERCENT;\n  var lastSegmentEnd = new Date(lastSegmentStart.getTime() + lastSegmentDuration * 1000);\n\n  if (dateTimeObject > lastSegmentEnd) {\n    // Beyond the end of the stream, or our best guess of the end of the stream.\n    return null;\n  }\n\n  if (dateTimeObject > lastSegmentStart) {\n    segment = lastSegment;\n  }\n\n  return {\n    segment: segment,\n    estimatedStart: segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationStart : Playlist.duration(playlist, playlist.mediaSequence + playlist.segments.indexOf(segment)),\n    // Although, given that all segments have accurate date time objects, the segment\n    // selected should be accurate, unless the video has been transmuxed at some point\n    // (determined by the presence of the videoTimingInfo object), the segment's \"player\n    // time\" (the start time in the player) can't be considered accurate.\n    type: segment.videoTimingInfo ? 'accurate' : 'estimate'\n  };\n};\n/**\n * Finds a segment that contains the given player time(in seconds).\n *\n * @param {Number} time The player time to find a match for\n * @param {Object} playlist A playlist object to search within\n */\n\n\nvar findSegmentForPlayerTime = function findSegmentForPlayerTime(time, playlist) {\n  // Assumptions:\n  // - there will always be a segment.duration\n  // - we can start from zero\n  // - segments are in time order\n  if (!playlist || !playlist.segments || playlist.segments.length === 0) {\n    return null;\n  }\n\n  var segmentEnd = 0;\n  var segment = void 0;\n\n  for (var i = 0; i < playlist.segments.length; i++) {\n    segment = playlist.segments[i]; // videoTimingInfo is set after the segment is downloaded and transmuxed, and\n    // should contain the most accurate values we have for the segment's player times.\n    //\n    // Use the accurate transmuxedPresentationEnd value if it is available, otherwise fall\n    // back to an estimate based on the manifest derived (inaccurate) segment.duration, to\n    // calculate an end value.\n\n    segmentEnd = segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationEnd : segmentEnd + segment.duration;\n\n    if (time <= segmentEnd) {\n      break;\n    }\n  }\n\n  var lastSegment = playlist.segments[playlist.segments.length - 1];\n\n  if (lastSegment.videoTimingInfo && lastSegment.videoTimingInfo.transmuxedPresentationEnd < time) {\n    // The time requested is beyond the stream end.\n    return null;\n  }\n\n  if (time > segmentEnd) {\n    // The time is within or beyond the last segment.\n    //\n    // Check to see if the time is beyond a reasonable guess of the end of the stream.\n    if (time > segmentEnd + lastSegment.duration * SEGMENT_END_FUDGE_PERCENT) {\n      // Technically, because the duration value is only an estimate, the time may still\n      // exist in the last segment, however, there isn't enough information to make even\n      // a reasonable estimate.\n      return null;\n    }\n\n    segment = lastSegment;\n  }\n\n  return {\n    segment: segment,\n    estimatedStart: segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationStart : segmentEnd - segment.duration,\n    // Because videoTimingInfo is only set after transmux, it is the only way to get\n    // accurate timing values.\n    type: segment.videoTimingInfo ? 'accurate' : 'estimate'\n  };\n};\n/**\n * Gives the offset of the comparisonTimestamp from the programTime timestamp in seconds.\n * If the offset returned is positive, the programTime occurs after the\n * comparisonTimestamp.\n * If the offset is negative, the programTime occurs before the comparisonTimestamp.\n *\n * @param {String} comparisonTimeStamp An ISO-8601 timestamp to compare against\n * @param {String} programTime The programTime as an ISO-8601 string\n * @return {Number} offset\n */\n\n\nvar getOffsetFromTimestamp = function getOffsetFromTimestamp(comparisonTimeStamp, programTime) {\n  var segmentDateTime = void 0;\n  var programDateTime = void 0;\n\n  try {\n    segmentDateTime = new Date(comparisonTimeStamp);\n    programDateTime = new Date(programTime);\n  } catch (e) {// TODO handle error\n  }\n\n  var segmentTimeEpoch = segmentDateTime.getTime();\n  var programTimeEpoch = programDateTime.getTime();\n  return (programTimeEpoch - segmentTimeEpoch) / 1000;\n};\n/**\n * Checks that all segments in this playlist have programDateTime tags.\n *\n * @param {Object} playlist A playlist object\n */\n\n\nvar verifyProgramDateTimeTags = function verifyProgramDateTimeTags(playlist) {\n  if (!playlist.segments || playlist.segments.length === 0) {\n    return false;\n  }\n\n  for (var i = 0; i < playlist.segments.length; i++) {\n    var segment = playlist.segments[i];\n\n    if (!segment.dateTimeObject) {\n      return false;\n    }\n  }\n\n  return true;\n};\n/**\n * Returns the programTime of the media given a playlist and a playerTime.\n * The playlist must have programDateTime tags for a programDateTime tag to be returned.\n * If the segments containing the time requested have not been buffered yet, an estimate\n * may be returned to the callback.\n *\n * @param {Object} args\n * @param {Object} args.playlist A playlist object to search within\n * @param {Number} time A playerTime in seconds\n * @param {Function} callback(err, programTime)\n * @returns {String} err.message A detailed error message\n * @returns {Object} programTime\n * @returns {Number} programTime.mediaSeconds The streamTime in seconds\n * @returns {String} programTime.programDateTime The programTime as an ISO-8601 String\n */\n\n\nvar getProgramTime = function getProgramTime(_ref) {\n  var playlist = _ref.playlist,\n      _ref$time = _ref.time,\n      time = _ref$time === undefined ? undefined : _ref$time,\n      callback = _ref.callback;\n\n  if (!callback) {\n    throw new Error('getProgramTime: callback must be provided');\n  }\n\n  if (!playlist || time === undefined) {\n    return callback({\n      message: 'getProgramTime: playlist and time must be provided'\n    });\n  }\n\n  var matchedSegment = findSegmentForPlayerTime(time, playlist);\n\n  if (!matchedSegment) {\n    return callback({\n      message: 'valid programTime was not found'\n    });\n  }\n\n  if (matchedSegment.type === 'estimate') {\n    return callback({\n      message: 'Accurate programTime could not be determined.' + ' Please seek to e.seekTime and try again',\n      seekTime: matchedSegment.estimatedStart\n    });\n  }\n\n  var programTimeObject = {\n    mediaSeconds: time\n  };\n  var programTime = playerTimeToProgramTime(time, matchedSegment.segment);\n\n  if (programTime) {\n    programTimeObject.programDateTime = programTime.toISOString();\n  }\n\n  return callback(null, programTimeObject);\n};\n/**\n * Seeks in the player to a time that matches the given programTime ISO-8601 string.\n *\n * @param {Object} args\n * @param {String} args.programTime A programTime to seek to as an ISO-8601 String\n * @param {Object} args.playlist A playlist to look within\n * @param {Number} args.retryCount The number of times to try for an accurate seek. Default is 2.\n * @param {Function} args.seekTo A method to perform a seek\n * @param {Boolean} args.pauseAfterSeek Whether to end in a paused state after seeking. Default is true.\n * @param {Object} args.tech The tech to seek on\n * @param {Function} args.callback(err, newTime) A callback to return the new time to\n * @returns {String} err.message A detailed error message\n * @returns {Number} newTime The exact time that was seeked to in seconds\n */\n\n\nvar seekToProgramTime = function seekToProgramTime(_ref2) {\n  var programTime = _ref2.programTime,\n      playlist = _ref2.playlist,\n      _ref2$retryCount = _ref2.retryCount,\n      retryCount = _ref2$retryCount === undefined ? 2 : _ref2$retryCount,\n      seekTo = _ref2.seekTo,\n      _ref2$pauseAfterSeek = _ref2.pauseAfterSeek,\n      pauseAfterSeek = _ref2$pauseAfterSeek === undefined ? true : _ref2$pauseAfterSeek,\n      tech = _ref2.tech,\n      callback = _ref2.callback;\n\n  if (!callback) {\n    throw new Error('seekToProgramTime: callback must be provided');\n  }\n\n  if (typeof programTime === 'undefined' || !playlist || !seekTo) {\n    return callback({\n      message: 'seekToProgramTime: programTime, seekTo and playlist must be provided'\n    });\n  }\n\n  if (!playlist.endList && !tech.hasStarted_) {\n    return callback({\n      message: 'player must be playing a live stream to start buffering'\n    });\n  }\n\n  if (!verifyProgramDateTimeTags(playlist)) {\n    return callback({\n      message: 'programDateTime tags must be provided in the manifest ' + playlist.resolvedUri\n    });\n  }\n\n  var matchedSegment = findSegmentForProgramTime(programTime, playlist); // no match\n\n  if (!matchedSegment) {\n    return callback({\n      message: programTime + ' was not found in the stream'\n    });\n  }\n\n  var segment = matchedSegment.segment;\n  var mediaOffset = getOffsetFromTimestamp(segment.dateTimeObject, programTime);\n\n  if (matchedSegment.type === 'estimate') {\n    // we've run out of retries\n    if (retryCount === 0) {\n      return callback({\n        message: programTime + ' is not buffered yet. Try again'\n      });\n    }\n\n    seekTo(matchedSegment.estimatedStart + mediaOffset);\n    tech.one('seeked', function () {\n      seekToProgramTime({\n        programTime: programTime,\n        playlist: playlist,\n        retryCount: retryCount - 1,\n        seekTo: seekTo,\n        pauseAfterSeek: pauseAfterSeek,\n        tech: tech,\n        callback: callback\n      });\n    });\n    return;\n  } // Since the segment.start value is determined from the buffered end or ending time\n  // of the prior segment, the seekToTime doesn't need to account for any transmuxer\n  // modifications.\n\n\n  var seekToTime = segment.start + mediaOffset;\n\n  var seekedCallback = function seekedCallback() {\n    return callback(null, tech.currentTime());\n  }; // listen for seeked event\n\n\n  tech.one('seeked', seekedCallback); // pause before seeking as video.js will restore this state\n\n  if (pauseAfterSeek) {\n    tech.pause();\n  }\n\n  seekTo(seekToTime);\n};\n/**\n * ranges\n *\n * Utilities for working with TimeRanges.\n *\n */\n// Fudge factor to account for TimeRanges rounding\n\n\nvar TIME_FUDGE_FACTOR = 1 / 30; // Comparisons between time values such as current time and the end of the buffered range\n// can be misleading because of precision differences or when the current media has poorly\n// aligned audio and video, which can cause values to be slightly off from what you would\n// expect. This value is what we consider to be safe to use in such comparisons to account\n// for these scenarios.\n\nvar SAFE_TIME_DELTA = TIME_FUDGE_FACTOR * 3;\n\nvar filterRanges = function filterRanges(timeRanges, predicate) {\n  var results = [];\n  var i = void 0;\n\n  if (timeRanges && timeRanges.length) {\n    // Search for ranges that match the predicate\n    for (i = 0; i < timeRanges.length; i++) {\n      if (predicate(timeRanges.start(i), timeRanges.end(i))) {\n        results.push([timeRanges.start(i), timeRanges.end(i)]);\n      }\n    }\n  }\n\n  return videojs$1.createTimeRanges(results);\n};\n/**\n * Attempts to find the buffered TimeRange that contains the specified\n * time.\n * @param {TimeRanges} buffered - the TimeRanges object to query\n * @param {number} time  - the time to filter on.\n * @returns {TimeRanges} a new TimeRanges object\n */\n\n\nvar findRange = function findRange(buffered, time) {\n  return filterRanges(buffered, function (start, end) {\n    return start - SAFE_TIME_DELTA <= time && end + SAFE_TIME_DELTA >= time;\n  });\n};\n/**\n * Returns the TimeRanges that begin later than the specified time.\n * @param {TimeRanges} timeRanges - the TimeRanges object to query\n * @param {number} time - the time to filter on.\n * @returns {TimeRanges} a new TimeRanges object.\n */\n\n\nvar findNextRange = function findNextRange(timeRanges, time) {\n  return filterRanges(timeRanges, function (start) {\n    return start - TIME_FUDGE_FACTOR >= time;\n  });\n};\n/**\n * Returns gaps within a list of TimeRanges\n * @param {TimeRanges} buffered - the TimeRanges object\n * @return {TimeRanges} a TimeRanges object of gaps\n */\n\n\nvar findGaps = function findGaps(buffered) {\n  if (buffered.length < 2) {\n    return videojs$1.createTimeRanges();\n  }\n\n  var ranges = [];\n\n  for (var i = 1; i < buffered.length; i++) {\n    var start = buffered.end(i - 1);\n    var end = buffered.start(i);\n    ranges.push([start, end]);\n  }\n\n  return videojs$1.createTimeRanges(ranges);\n};\n/**\n * Gets a human readable string for a TimeRange\n *\n * @param {TimeRange} range\n * @returns {String} a human readable string\n */\n\n\nvar printableRange = function printableRange(range) {\n  var strArr = [];\n\n  if (!range || !range.length) {\n    return '';\n  }\n\n  for (var i = 0; i < range.length; i++) {\n    strArr.push(range.start(i) + ' => ' + range.end(i));\n  }\n\n  return strArr.join(', ');\n};\n/**\n * Calculates the amount of time left in seconds until the player hits the end of the\n * buffer and causes a rebuffer\n *\n * @param {TimeRange} buffered\n *        The state of the buffer\n * @param {Numnber} currentTime\n *        The current time of the player\n * @param {Number} playbackRate\n *        The current playback rate of the player. Defaults to 1.\n * @return {Number}\n *         Time until the player has to start rebuffering in seconds.\n * @function timeUntilRebuffer\n */\n\n\nvar timeUntilRebuffer = function timeUntilRebuffer(buffered, currentTime) {\n  var playbackRate = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 1;\n  var bufferedEnd = buffered.length ? buffered.end(buffered.length - 1) : 0;\n  return (bufferedEnd - currentTime) / playbackRate;\n};\n/**\n * Converts a TimeRanges object into an array representation\n * @param {TimeRanges} timeRanges\n * @returns {Array}\n */\n\n\nvar timeRangesToArray = function timeRangesToArray(timeRanges) {\n  var timeRangesList = [];\n\n  for (var i = 0; i < timeRanges.length; i++) {\n    timeRangesList.push({\n      start: timeRanges.start(i),\n      end: timeRanges.end(i)\n    });\n  }\n\n  return timeRangesList;\n};\n/**\n * @file create-text-tracks-if-necessary.js\n */\n\n/**\n * Create text tracks on video.js if they exist on a segment.\n *\n * @param {Object} sourceBuffer the VSB or FSB\n * @param {Object} mediaSource the HTML media source\n * @param {Object} segment the segment that may contain the text track\n * @private\n */\n\n\nvar createTextTracksIfNecessary = function createTextTracksIfNecessary(sourceBuffer, mediaSource, segment) {\n  var player = mediaSource.player_; // create an in-band caption track if one is present in the segment\n\n  if (segment.captions && segment.captions.length) {\n    if (!sourceBuffer.inbandTextTracks_) {\n      sourceBuffer.inbandTextTracks_ = {};\n    }\n\n    for (var trackId in segment.captionStreams) {\n      if (!sourceBuffer.inbandTextTracks_[trackId]) {\n        player.tech_.trigger({\n          type: 'usage',\n          name: 'hls-608'\n        });\n        var track = player.textTracks().getTrackById(trackId);\n\n        if (track) {\n          // Resuse an existing track with a CC# id because this was\n          // very likely created by videojs-contrib-hls from information\n          // in the m3u8 for us to use\n          sourceBuffer.inbandTextTracks_[trackId] = track;\n        } else {\n          // Otherwise, create a track with the default `CC#` label and\n          // without a language\n          sourceBuffer.inbandTextTracks_[trackId] = player.addRemoteTextTrack({\n            kind: 'captions',\n            id: trackId,\n            label: trackId\n          }, false).track;\n        }\n      }\n    }\n  }\n\n  if (segment.metadata && segment.metadata.length && !sourceBuffer.metadataTrack_) {\n    sourceBuffer.metadataTrack_ = player.addRemoteTextTrack({\n      kind: 'metadata',\n      label: 'Timed Metadata'\n    }, false).track;\n    sourceBuffer.metadataTrack_.inBandMetadataTrackDispatchType = segment.metadata.dispatchType;\n  }\n};\n/**\n * @file remove-cues-from-track.js\n */\n\n/**\n * Remove cues from a track on video.js.\n *\n * @param {Double} start start of where we should remove the cue\n * @param {Double} end end of where the we should remove the cue\n * @param {Object} track the text track to remove the cues from\n * @private\n */\n\n\nvar removeCuesFromTrack = function removeCuesFromTrack(start, end, track) {\n  var i = void 0;\n  var cue = void 0;\n\n  if (!track) {\n    return;\n  }\n\n  if (!track.cues) {\n    return;\n  }\n\n  i = track.cues.length;\n\n  while (i--) {\n    cue = track.cues[i]; // Remove any overlapping cue\n\n    if (cue.startTime <= end && cue.endTime >= start) {\n      track.removeCue(cue);\n    }\n  }\n};\n/**\n * @file add-text-track-data.js\n */\n\n/**\n * Define properties on a cue for backwards compatability,\n * but warn the user that the way that they are using it\n * is depricated and will be removed at a later date.\n *\n * @param {Cue} cue the cue to add the properties on\n * @private\n */\n\n\nvar deprecateOldCue = function deprecateOldCue(cue) {\n  Object.defineProperties(cue.frame, {\n    id: {\n      get: function get() {\n        videojs$1.log.warn('cue.frame.id is deprecated. Use cue.value.key instead.');\n        return cue.value.key;\n      }\n    },\n    value: {\n      get: function get() {\n        videojs$1.log.warn('cue.frame.value is deprecated. Use cue.value.data instead.');\n        return cue.value.data;\n      }\n    },\n    privateData: {\n      get: function get() {\n        videojs$1.log.warn('cue.frame.privateData is deprecated. Use cue.value.data instead.');\n        return cue.value.data;\n      }\n    }\n  });\n};\n\nvar durationOfVideo = function durationOfVideo(duration) {\n  var dur = void 0;\n\n  if (isNaN(duration) || Math.abs(duration) === Infinity) {\n    dur = Number.MAX_VALUE;\n  } else {\n    dur = duration;\n  }\n\n  return dur;\n};\n/**\n * Add text track data to a source handler given the captions and\n * metadata from the buffer.\n *\n * @param {Object} sourceHandler the virtual source buffer\n * @param {Array} captionArray an array of caption data\n * @param {Array} metadataArray an array of meta data\n * @private\n */\n\n\nvar addTextTrackData = function addTextTrackData(sourceHandler, captionArray, metadataArray) {\n  var Cue = window$1.WebKitDataCue || window$1.VTTCue;\n\n  if (captionArray) {\n    captionArray.forEach(function (caption) {\n      var track = caption.stream;\n      this.inbandTextTracks_[track].addCue(new Cue(caption.startTime + this.timestampOffset, caption.endTime + this.timestampOffset, caption.text));\n    }, sourceHandler);\n  }\n\n  if (metadataArray) {\n    var videoDuration = durationOfVideo(sourceHandler.mediaSource_.duration);\n    metadataArray.forEach(function (metadata) {\n      var time = metadata.cueTime + this.timestampOffset; // if time isn't a finite number between 0 and Infinity, like NaN,\n      // ignore this bit of metadata.\n      // This likely occurs when you have an non-timed ID3 tag like TIT2,\n      // which is the \"Title/Songname/Content description\" frame\n\n      if (typeof time !== 'number' || window$1.isNaN(time) || time < 0 || !(time < Infinity)) {\n        return;\n      }\n\n      metadata.frames.forEach(function (frame) {\n        var cue = new Cue(time, time, frame.value || frame.url || frame.data || '');\n        cue.frame = frame;\n        cue.value = frame;\n        deprecateOldCue(cue);\n        this.metadataTrack_.addCue(cue);\n      }, this);\n    }, sourceHandler); // Updating the metadeta cues so that\n    // the endTime of each cue is the startTime of the next cue\n    // the endTime of last cue is the duration of the video\n\n    if (sourceHandler.metadataTrack_ && sourceHandler.metadataTrack_.cues && sourceHandler.metadataTrack_.cues.length) {\n      var cues = sourceHandler.metadataTrack_.cues;\n      var cuesArray = []; // Create a copy of the TextTrackCueList...\n      // ...disregarding cues with a falsey value\n\n      for (var i = 0; i < cues.length; i++) {\n        if (cues[i]) {\n          cuesArray.push(cues[i]);\n        }\n      } // Group cues by their startTime value\n\n\n      var cuesGroupedByStartTime = cuesArray.reduce(function (obj, cue) {\n        var timeSlot = obj[cue.startTime] || [];\n        timeSlot.push(cue);\n        obj[cue.startTime] = timeSlot;\n        return obj;\n      }, {}); // Sort startTimes by ascending order\n\n      var sortedStartTimes = Object.keys(cuesGroupedByStartTime).sort(function (a, b) {\n        return Number(a) - Number(b);\n      }); // Map each cue group's endTime to the next group's startTime\n\n      sortedStartTimes.forEach(function (startTime, idx) {\n        var cueGroup = cuesGroupedByStartTime[startTime];\n        var nextTime = Number(sortedStartTimes[idx + 1]) || videoDuration; // Map each cue's endTime the next group's startTime\n\n        cueGroup.forEach(function (cue) {\n          cue.endTime = nextTime;\n        });\n      });\n    }\n  }\n};\n\nvar win = typeof window !== 'undefined' ? window : {},\n    TARGET = typeof Symbol === 'undefined' ? '__target' : Symbol(),\n    SCRIPT_TYPE = 'application/javascript',\n    BlobBuilder = win.BlobBuilder || win.WebKitBlobBuilder || win.MozBlobBuilder || win.MSBlobBuilder,\n    URL = win.URL || win.webkitURL || URL && URL.msURL,\n    Worker = win.Worker;\n/**\n * Returns a wrapper around Web Worker code that is constructible.\n *\n * @function shimWorker\n *\n * @param { String }    filename    The name of the file\n * @param { Function }  fn          Function wrapping the code of the worker\n */\n\nfunction shimWorker(filename, fn) {\n  return function ShimWorker(forceFallback) {\n    var o = this;\n\n    if (!fn) {\n      return new Worker(filename);\n    } else if (Worker && !forceFallback) {\n      // Convert the function's inner code to a string to construct the worker\n      var source = fn.toString().replace(/^function.+?{/, '').slice(0, -1),\n          objURL = createSourceObject(source);\n      this[TARGET] = new Worker(objURL);\n      wrapTerminate(this[TARGET], objURL);\n      return this[TARGET];\n    } else {\n      var selfShim = {\n        postMessage: function postMessage(m) {\n          if (o.onmessage) {\n            setTimeout(function () {\n              o.onmessage({\n                data: m,\n                target: selfShim\n              });\n            });\n          }\n        }\n      };\n      fn.call(selfShim);\n\n      this.postMessage = function (m) {\n        setTimeout(function () {\n          selfShim.onmessage({\n            data: m,\n            target: o\n          });\n        });\n      };\n\n      this.isThisThread = true;\n    }\n  };\n} // Test Worker capabilities\n\n\nif (Worker) {\n  var testWorker,\n      objURL = createSourceObject('self.onmessage = function () {}'),\n      testArray = new Uint8Array(1);\n\n  try {\n    testWorker = new Worker(objURL); // Native browser on some Samsung devices throws for transferables, let's detect it\n\n    testWorker.postMessage(testArray, [testArray.buffer]);\n  } catch (e) {\n    Worker = null;\n  } finally {\n    URL.revokeObjectURL(objURL);\n\n    if (testWorker) {\n      testWorker.terminate();\n    }\n  }\n}\n\nfunction createSourceObject(str) {\n  try {\n    return URL.createObjectURL(new Blob([str], {\n      type: SCRIPT_TYPE\n    }));\n  } catch (e) {\n    var blob = new BlobBuilder();\n    blob.append(str);\n    return URL.createObjectURL(blob.getBlob(type));\n  }\n}\n\nfunction wrapTerminate(worker, objURL) {\n  if (!worker || !objURL) return;\n  var term = worker.terminate;\n  worker.objURL = objURL;\n\n  worker.terminate = function () {\n    if (worker.objURL) URL.revokeObjectURL(worker.objURL);\n    term.call(worker);\n  };\n}\n\nvar TransmuxWorker = new shimWorker(\"./transmuxer-worker.worker.js\", function (window, document$$1) {\n  var self = this;\n\n  var transmuxerWorker = function () {\n    /**\n     * mux.js\n     *\n     * Copyright (c) Brightcove\n     * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n     *\n     * A lightweight readable stream implemention that handles event dispatching.\n     * Objects that inherit from streams should call init in their constructors.\n     */\n    var Stream = function Stream() {\n      this.init = function () {\n        var listeners = {};\n        /**\n         * Add a listener for a specified event type.\n         * @param type {string} the event name\n         * @param listener {function} the callback to be invoked when an event of\n         * the specified type occurs\n         */\n\n        this.on = function (type, listener) {\n          if (!listeners[type]) {\n            listeners[type] = [];\n          }\n\n          listeners[type] = listeners[type].concat(listener);\n        };\n        /**\n         * Remove a listener for a specified event type.\n         * @param type {string} the event name\n         * @param listener {function} a function previously registered for this\n         * type of event through `on`\n         */\n\n\n        this.off = function (type, listener) {\n          var index;\n\n          if (!listeners[type]) {\n            return false;\n          }\n\n          index = listeners[type].indexOf(listener);\n          listeners[type] = listeners[type].slice();\n          listeners[type].splice(index, 1);\n          return index > -1;\n        };\n        /**\n         * Trigger an event of the specified type on this stream. Any additional\n         * arguments to this function are passed as parameters to event listeners.\n         * @param type {string} the event name\n         */\n\n\n        this.trigger = function (type) {\n          var callbacks, i, length, args;\n          callbacks = listeners[type];\n\n          if (!callbacks) {\n            return;\n          } // Slicing the arguments on every invocation of this method\n          // can add a significant amount of overhead. Avoid the\n          // intermediate object creation for the common case of a\n          // single callback argument\n\n\n          if (arguments.length === 2) {\n            length = callbacks.length;\n\n            for (i = 0; i < length; ++i) {\n              callbacks[i].call(this, arguments[1]);\n            }\n          } else {\n            args = [];\n            i = arguments.length;\n\n            for (i = 1; i < arguments.length; ++i) {\n              args.push(arguments[i]);\n            }\n\n            length = callbacks.length;\n\n            for (i = 0; i < length; ++i) {\n              callbacks[i].apply(this, args);\n            }\n          }\n        };\n        /**\n         * Destroys the stream and cleans up.\n         */\n\n\n        this.dispose = function () {\n          listeners = {};\n        };\n      };\n    };\n    /**\n     * Forwards all `data` events on this stream to the destination stream. The\n     * destination stream should provide a method `push` to receive the data\n     * events as they arrive.\n     * @param destination {stream} the stream that will receive all `data` events\n     * @param autoFlush {boolean} if false, we will not call `flush` on the destination\n     *                            when the current stream emits a 'done' event\n     * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n     */\n\n\n    Stream.prototype.pipe = function (destination) {\n      this.on('data', function (data) {\n        destination.push(data);\n      });\n      this.on('done', function (flushSource) {\n        destination.flush(flushSource);\n      });\n      this.on('partialdone', function (flushSource) {\n        destination.partialFlush(flushSource);\n      });\n      this.on('endedtimeline', function (flushSource) {\n        destination.endTimeline(flushSource);\n      });\n      this.on('reset', function (flushSource) {\n        destination.reset(flushSource);\n      });\n      return destination;\n    }; // Default stream functions that are expected to be overridden to perform\n    // actual work. These are provided by the prototype as a sort of no-op\n    // implementation so that we don't have to check for their existence in the\n    // `pipe` function above.\n\n\n    Stream.prototype.push = function (data) {\n      this.trigger('data', data);\n    };\n\n    Stream.prototype.flush = function (flushSource) {\n      this.trigger('done', flushSource);\n    };\n\n    Stream.prototype.partialFlush = function (flushSource) {\n      this.trigger('partialdone', flushSource);\n    };\n\n    Stream.prototype.endTimeline = function (flushSource) {\n      this.trigger('endedtimeline', flushSource);\n    };\n\n    Stream.prototype.reset = function (flushSource) {\n      this.trigger('reset', flushSource);\n    };\n\n    var stream = Stream;\n    /**\n     * mux.js\n     *\n     * Copyright (c) Brightcove\n     * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n     *\n     * Functions that generate fragmented MP4s suitable for use with Media\n     * Source Extensions.\n     */\n\n    var UINT32_MAX = Math.pow(2, 32) - 1;\n    var box, dinf, esds, ftyp, mdat, mfhd, minf, moof, moov, mvex, mvhd, trak, tkhd, mdia, mdhd, hdlr, sdtp, stbl, stsd, traf, trex, trun, types, MAJOR_BRAND, MINOR_VERSION, AVC1_BRAND, VIDEO_HDLR, AUDIO_HDLR, HDLR_TYPES, VMHD, SMHD, DREF, STCO, STSC, STSZ, STTS; // pre-calculate constants\n\n    (function () {\n      var i;\n      types = {\n        avc1: [],\n        // codingname\n        avcC: [],\n        btrt: [],\n        dinf: [],\n        dref: [],\n        esds: [],\n        ftyp: [],\n        hdlr: [],\n        mdat: [],\n        mdhd: [],\n        mdia: [],\n        mfhd: [],\n        minf: [],\n        moof: [],\n        moov: [],\n        mp4a: [],\n        // codingname\n        mvex: [],\n        mvhd: [],\n        pasp: [],\n        sdtp: [],\n        smhd: [],\n        stbl: [],\n        stco: [],\n        stsc: [],\n        stsd: [],\n        stsz: [],\n        stts: [],\n        styp: [],\n        tfdt: [],\n        tfhd: [],\n        traf: [],\n        trak: [],\n        trun: [],\n        trex: [],\n        tkhd: [],\n        vmhd: []\n      }; // In environments where Uint8Array is undefined (e.g., IE8), skip set up so that we\n      // don't throw an error\n\n      if (typeof Uint8Array === 'undefined') {\n        return;\n      }\n\n      for (i in types) {\n        if (types.hasOwnProperty(i)) {\n          types[i] = [i.charCodeAt(0), i.charCodeAt(1), i.charCodeAt(2), i.charCodeAt(3)];\n        }\n      }\n\n      MAJOR_BRAND = new Uint8Array(['i'.charCodeAt(0), 's'.charCodeAt(0), 'o'.charCodeAt(0), 'm'.charCodeAt(0)]);\n      AVC1_BRAND = new Uint8Array(['a'.charCodeAt(0), 'v'.charCodeAt(0), 'c'.charCodeAt(0), '1'.charCodeAt(0)]);\n      MINOR_VERSION = new Uint8Array([0, 0, 0, 1]);\n      VIDEO_HDLR = new Uint8Array([0x00, // version 0\n      0x00, 0x00, 0x00, // flags\n      0x00, 0x00, 0x00, 0x00, // pre_defined\n      0x76, 0x69, 0x64, 0x65, // handler_type: 'vide'\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x56, 0x69, 0x64, 0x65, 0x6f, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'VideoHandler'\n      ]);\n      AUDIO_HDLR = new Uint8Array([0x00, // version 0\n      0x00, 0x00, 0x00, // flags\n      0x00, 0x00, 0x00, 0x00, // pre_defined\n      0x73, 0x6f, 0x75, 0x6e, // handler_type: 'soun'\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x53, 0x6f, 0x75, 0x6e, 0x64, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'SoundHandler'\n      ]);\n      HDLR_TYPES = {\n        video: VIDEO_HDLR,\n        audio: AUDIO_HDLR\n      };\n      DREF = new Uint8Array([0x00, // version 0\n      0x00, 0x00, 0x00, // flags\n      0x00, 0x00, 0x00, 0x01, // entry_count\n      0x00, 0x00, 0x00, 0x0c, // entry_size\n      0x75, 0x72, 0x6c, 0x20, // 'url' type\n      0x00, // version 0\n      0x00, 0x00, 0x01 // entry_flags\n      ]);\n      SMHD = new Uint8Array([0x00, // version\n      0x00, 0x00, 0x00, // flags\n      0x00, 0x00, // balance, 0 means centered\n      0x00, 0x00 // reserved\n      ]);\n      STCO = new Uint8Array([0x00, // version\n      0x00, 0x00, 0x00, // flags\n      0x00, 0x00, 0x00, 0x00 // entry_count\n      ]);\n      STSC = STCO;\n      STSZ = new Uint8Array([0x00, // version\n      0x00, 0x00, 0x00, // flags\n      0x00, 0x00, 0x00, 0x00, // sample_size\n      0x00, 0x00, 0x00, 0x00 // sample_count\n      ]);\n      STTS = STCO;\n      VMHD = new Uint8Array([0x00, // version\n      0x00, 0x00, 0x01, // flags\n      0x00, 0x00, // graphicsmode\n      0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // opcolor\n      ]);\n    })();\n\n    box = function box(type) {\n      var payload = [],\n          size = 0,\n          i,\n          result,\n          view;\n\n      for (i = 1; i < arguments.length; i++) {\n        payload.push(arguments[i]);\n      }\n\n      i = payload.length; // calculate the total size we need to allocate\n\n      while (i--) {\n        size += payload[i].byteLength;\n      }\n\n      result = new Uint8Array(size + 8);\n      view = new DataView(result.buffer, result.byteOffset, result.byteLength);\n      view.setUint32(0, result.byteLength);\n      result.set(type, 4); // copy the payload into the result\n\n      for (i = 0, size = 8; i < payload.length; i++) {\n        result.set(payload[i], size);\n        size += payload[i].byteLength;\n      }\n\n      return result;\n    };\n\n    dinf = function dinf() {\n      return box(types.dinf, box(types.dref, DREF));\n    };\n\n    esds = function esds(track) {\n      return box(types.esds, new Uint8Array([0x00, // version\n      0x00, 0x00, 0x00, // flags\n      // ES_Descriptor\n      0x03, // tag, ES_DescrTag\n      0x19, // length\n      0x00, 0x00, // ES_ID\n      0x00, // streamDependenceFlag, URL_flag, reserved, streamPriority\n      // DecoderConfigDescriptor\n      0x04, // tag, DecoderConfigDescrTag\n      0x11, // length\n      0x40, // object type\n      0x15, // streamType\n      0x00, 0x06, 0x00, // bufferSizeDB\n      0x00, 0x00, 0xda, 0xc0, // maxBitrate\n      0x00, 0x00, 0xda, 0xc0, // avgBitrate\n      // DecoderSpecificInfo\n      0x05, // tag, DecoderSpecificInfoTag\n      0x02, // length\n      // ISO/IEC 14496-3, AudioSpecificConfig\n      // for samplingFrequencyIndex see ISO/IEC 13818-7:2006, 8.1.3.2.2, Table 35\n      track.audioobjecttype << 3 | track.samplingfrequencyindex >>> 1, track.samplingfrequencyindex << 7 | track.channelcount << 3, 0x06, 0x01, 0x02 // GASpecificConfig\n      ]));\n    };\n\n    ftyp = function ftyp() {\n      return box(types.ftyp, MAJOR_BRAND, MINOR_VERSION, MAJOR_BRAND, AVC1_BRAND);\n    };\n\n    hdlr = function hdlr(type) {\n      return box(types.hdlr, HDLR_TYPES[type]);\n    };\n\n    mdat = function mdat(data) {\n      return box(types.mdat, data);\n    };\n\n    mdhd = function mdhd(track) {\n      var result = new Uint8Array([0x00, // version 0\n      0x00, 0x00, 0x00, // flags\n      0x00, 0x00, 0x00, 0x02, // creation_time\n      0x00, 0x00, 0x00, 0x03, // modification_time\n      0x00, 0x01, 0x5f, 0x90, // timescale, 90,000 \"ticks\" per second\n      track.duration >>> 24 & 0xFF, track.duration >>> 16 & 0xFF, track.duration >>> 8 & 0xFF, track.duration & 0xFF, // duration\n      0x55, 0xc4, // 'und' language (undetermined)\n      0x00, 0x00]); // Use the sample rate from the track metadata, when it is\n      // defined. The sample rate can be parsed out of an ADTS header, for\n      // instance.\n\n      if (track.samplerate) {\n        result[12] = track.samplerate >>> 24 & 0xFF;\n        result[13] = track.samplerate >>> 16 & 0xFF;\n        result[14] = track.samplerate >>> 8 & 0xFF;\n        result[15] = track.samplerate & 0xFF;\n      }\n\n      return box(types.mdhd, result);\n    };\n\n    mdia = function mdia(track) {\n      return box(types.mdia, mdhd(track), hdlr(track.type), minf(track));\n    };\n\n    mfhd = function mfhd(sequenceNumber) {\n      return box(types.mfhd, new Uint8Array([0x00, 0x00, 0x00, 0x00, // flags\n      (sequenceNumber & 0xFF000000) >> 24, (sequenceNumber & 0xFF0000) >> 16, (sequenceNumber & 0xFF00) >> 8, sequenceNumber & 0xFF // sequence_number\n      ]));\n    };\n\n    minf = function minf(track) {\n      return box(types.minf, track.type === 'video' ? box(types.vmhd, VMHD) : box(types.smhd, SMHD), dinf(), stbl(track));\n    };\n\n    moof = function moof(sequenceNumber, tracks) {\n      var trackFragments = [],\n          i = tracks.length; // build traf boxes for each track fragment\n\n      while (i--) {\n        trackFragments[i] = traf(tracks[i]);\n      }\n\n      return box.apply(null, [types.moof, mfhd(sequenceNumber)].concat(trackFragments));\n    };\n    /**\n     * Returns a movie box.\n     * @param tracks {array} the tracks associated with this movie\n     * @see ISO/IEC 14496-12:2012(E), section 8.2.1\n     */\n\n\n    moov = function moov(tracks) {\n      var i = tracks.length,\n          boxes = [];\n\n      while (i--) {\n        boxes[i] = trak(tracks[i]);\n      }\n\n      return box.apply(null, [types.moov, mvhd(0xffffffff)].concat(boxes).concat(mvex(tracks)));\n    };\n\n    mvex = function mvex(tracks) {\n      var i = tracks.length,\n          boxes = [];\n\n      while (i--) {\n        boxes[i] = trex(tracks[i]);\n      }\n\n      return box.apply(null, [types.mvex].concat(boxes));\n    };\n\n    mvhd = function mvhd(duration) {\n      var bytes = new Uint8Array([0x00, // version 0\n      0x00, 0x00, 0x00, // flags\n      0x00, 0x00, 0x00, 0x01, // creation_time\n      0x00, 0x00, 0x00, 0x02, // modification_time\n      0x00, 0x01, 0x5f, 0x90, // timescale, 90,000 \"ticks\" per second\n      (duration & 0xFF000000) >> 24, (duration & 0xFF0000) >> 16, (duration & 0xFF00) >> 8, duration & 0xFF, // duration\n      0x00, 0x01, 0x00, 0x00, // 1.0 rate\n      0x01, 0x00, // 1.0 volume\n      0x00, 0x00, // reserved\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, // transformation: unity matrix\n      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // pre_defined\n      0xff, 0xff, 0xff, 0xff // next_track_ID\n      ]);\n      return box(types.mvhd, bytes);\n    };\n\n    sdtp = function sdtp(track) {\n      var samples = track.samples || [],\n          bytes = new Uint8Array(4 + samples.length),\n          flags,\n          i; // leave the full box header (4 bytes) all zero\n      // write the sample table\n\n      for (i = 0; i < samples.length; i++) {\n        flags = samples[i].flags;\n        bytes[i + 4] = flags.dependsOn << 4 | flags.isDependedOn << 2 | flags.hasRedundancy;\n      }\n\n      return box(types.sdtp, bytes);\n    };\n\n    stbl = function stbl(track) {\n      return box(types.stbl, stsd(track), box(types.stts, STTS), box(types.stsc, STSC), box(types.stsz, STSZ), box(types.stco, STCO));\n    };\n\n    (function () {\n      var videoSample, audioSample;\n\n      stsd = function stsd(track) {\n        return box(types.stsd, new Uint8Array([0x00, // version 0\n        0x00, 0x00, 0x00, // flags\n        0x00, 0x00, 0x00, 0x01]), track.type === 'video' ? videoSample(track) : audioSample(track));\n      };\n\n      videoSample = function videoSample(track) {\n        var sps = track.sps || [],\n            pps = track.pps || [],\n            sequenceParameterSets = [],\n            pictureParameterSets = [],\n            i,\n            avc1Box; // assemble the SPSs\n\n        for (i = 0; i < sps.length; i++) {\n          sequenceParameterSets.push((sps[i].byteLength & 0xFF00) >>> 8);\n          sequenceParameterSets.push(sps[i].byteLength & 0xFF); // sequenceParameterSetLength\n\n          sequenceParameterSets = sequenceParameterSets.concat(Array.prototype.slice.call(sps[i])); // SPS\n        } // assemble the PPSs\n\n\n        for (i = 0; i < pps.length; i++) {\n          pictureParameterSets.push((pps[i].byteLength & 0xFF00) >>> 8);\n          pictureParameterSets.push(pps[i].byteLength & 0xFF);\n          pictureParameterSets = pictureParameterSets.concat(Array.prototype.slice.call(pps[i]));\n        }\n\n        avc1Box = [types.avc1, new Uint8Array([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved\n        0x00, 0x01, // data_reference_index\n        0x00, 0x00, // pre_defined\n        0x00, 0x00, // reserved\n        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // pre_defined\n        (track.width & 0xff00) >> 8, track.width & 0xff, // width\n        (track.height & 0xff00) >> 8, track.height & 0xff, // height\n        0x00, 0x48, 0x00, 0x00, // horizresolution\n        0x00, 0x48, 0x00, 0x00, // vertresolution\n        0x00, 0x00, 0x00, 0x00, // reserved\n        0x00, 0x01, // frame_count\n        0x13, 0x76, 0x69, 0x64, 0x65, 0x6f, 0x6a, 0x73, 0x2d, 0x63, 0x6f, 0x6e, 0x74, 0x72, 0x69, 0x62, 0x2d, 0x68, 0x6c, 0x73, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // compressorname\n        0x00, 0x18, // depth = 24\n        0x11, 0x11 // pre_defined = -1\n        ]), box(types.avcC, new Uint8Array([0x01, // configurationVersion\n        track.profileIdc, // AVCProfileIndication\n        track.profileCompatibility, // profile_compatibility\n        track.levelIdc, // AVCLevelIndication\n        0xff // lengthSizeMinusOne, hard-coded to 4 bytes\n        ].concat([sps.length], // numOfSequenceParameterSets\n        sequenceParameterSets, // \"SPS\"\n        [pps.length], // numOfPictureParameterSets\n        pictureParameterSets // \"PPS\"\n        ))), box(types.btrt, new Uint8Array([0x00, 0x1c, 0x9c, 0x80, // bufferSizeDB\n        0x00, 0x2d, 0xc6, 0xc0, // maxBitrate\n        0x00, 0x2d, 0xc6, 0xc0 // avgBitrate\n        ]))];\n\n        if (track.sarRatio) {\n          var hSpacing = track.sarRatio[0],\n              vSpacing = track.sarRatio[1];\n          avc1Box.push(box(types.pasp, new Uint8Array([(hSpacing & 0xFF000000) >> 24, (hSpacing & 0xFF0000) >> 16, (hSpacing & 0xFF00) >> 8, hSpacing & 0xFF, (vSpacing & 0xFF000000) >> 24, (vSpacing & 0xFF0000) >> 16, (vSpacing & 0xFF00) >> 8, vSpacing & 0xFF])));\n        }\n\n        return box.apply(null, avc1Box);\n      };\n\n      audioSample = function audioSample(track) {\n        return box(types.mp4a, new Uint8Array([// SampleEntry, ISO/IEC 14496-12\n        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved\n        0x00, 0x01, // data_reference_index\n        // AudioSampleEntry, ISO/IEC 14496-12\n        0x00, 0x00, 0x00, 0x00, // reserved\n        0x00, 0x00, 0x00, 0x00, // reserved\n        (track.channelcount & 0xff00) >> 8, track.channelcount & 0xff, // channelcount\n        (track.samplesize & 0xff00) >> 8, track.samplesize & 0xff, // samplesize\n        0x00, 0x00, // pre_defined\n        0x00, 0x00, // reserved\n        (track.samplerate & 0xff00) >> 8, track.samplerate & 0xff, 0x00, 0x00 // samplerate, 16.16\n        // MP4AudioSampleEntry, ISO/IEC 14496-14\n        ]), esds(track));\n      };\n    })();\n\n    tkhd = function tkhd(track) {\n      var result = new Uint8Array([0x00, // version 0\n      0x00, 0x00, 0x07, // flags\n      0x00, 0x00, 0x00, 0x00, // creation_time\n      0x00, 0x00, 0x00, 0x00, // modification_time\n      (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF, // track_ID\n      0x00, 0x00, 0x00, 0x00, // reserved\n      (track.duration & 0xFF000000) >> 24, (track.duration & 0xFF0000) >> 16, (track.duration & 0xFF00) >> 8, track.duration & 0xFF, // duration\n      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x00, // layer\n      0x00, 0x00, // alternate_group\n      0x01, 0x00, // non-audio track volume\n      0x00, 0x00, // reserved\n      0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, // transformation: unity matrix\n      (track.width & 0xFF00) >> 8, track.width & 0xFF, 0x00, 0x00, // width\n      (track.height & 0xFF00) >> 8, track.height & 0xFF, 0x00, 0x00 // height\n      ]);\n      return box(types.tkhd, result);\n    };\n    /**\n     * Generate a track fragment (traf) box. A traf box collects metadata\n     * about tracks in a movie fragment (moof) box.\n     */\n\n\n    traf = function traf(track) {\n      var trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun, sampleDependencyTable, dataOffset, upperWordBaseMediaDecodeTime, lowerWordBaseMediaDecodeTime;\n      trackFragmentHeader = box(types.tfhd, new Uint8Array([0x00, // version 0\n      0x00, 0x00, 0x3a, // flags\n      (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF, // track_ID\n      0x00, 0x00, 0x00, 0x01, // sample_description_index\n      0x00, 0x00, 0x00, 0x00, // default_sample_duration\n      0x00, 0x00, 0x00, 0x00, // default_sample_size\n      0x00, 0x00, 0x00, 0x00 // default_sample_flags\n      ]));\n      upperWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime / (UINT32_MAX + 1));\n      lowerWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime % (UINT32_MAX + 1));\n      trackFragmentDecodeTime = box(types.tfdt, new Uint8Array([0x01, // version 1\n      0x00, 0x00, 0x00, // flags\n      // baseMediaDecodeTime\n      upperWordBaseMediaDecodeTime >>> 24 & 0xFF, upperWordBaseMediaDecodeTime >>> 16 & 0xFF, upperWordBaseMediaDecodeTime >>> 8 & 0xFF, upperWordBaseMediaDecodeTime & 0xFF, lowerWordBaseMediaDecodeTime >>> 24 & 0xFF, lowerWordBaseMediaDecodeTime >>> 16 & 0xFF, lowerWordBaseMediaDecodeTime >>> 8 & 0xFF, lowerWordBaseMediaDecodeTime & 0xFF])); // the data offset specifies the number of bytes from the start of\n      // the containing moof to the first payload byte of the associated\n      // mdat\n\n      dataOffset = 32 + // tfhd\n      20 + // tfdt\n      8 + // traf header\n      16 + // mfhd\n      8 + // moof header\n      8; // mdat header\n      // audio tracks require less metadata\n\n      if (track.type === 'audio') {\n        trackFragmentRun = trun(track, dataOffset);\n        return box(types.traf, trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun);\n      } // video tracks should contain an independent and disposable samples\n      // box (sdtp)\n      // generate one and adjust offsets to match\n\n\n      sampleDependencyTable = sdtp(track);\n      trackFragmentRun = trun(track, sampleDependencyTable.length + dataOffset);\n      return box(types.traf, trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun, sampleDependencyTable);\n    };\n    /**\n     * Generate a track box.\n     * @param track {object} a track definition\n     * @return {Uint8Array} the track box\n     */\n\n\n    trak = function trak(track) {\n      track.duration = track.duration || 0xffffffff;\n      return box(types.trak, tkhd(track), mdia(track));\n    };\n\n    trex = function trex(track) {\n      var result = new Uint8Array([0x00, // version 0\n      0x00, 0x00, 0x00, // flags\n      (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF, // track_ID\n      0x00, 0x00, 0x00, 0x01, // default_sample_description_index\n      0x00, 0x00, 0x00, 0x00, // default_sample_duration\n      0x00, 0x00, 0x00, 0x00, // default_sample_size\n      0x00, 0x01, 0x00, 0x01 // default_sample_flags\n      ]); // the last two bytes of default_sample_flags is the sample\n      // degradation priority, a hint about the importance of this sample\n      // relative to others. Lower the degradation priority for all sample\n      // types other than video.\n\n      if (track.type !== 'video') {\n        result[result.length - 1] = 0x00;\n      }\n\n      return box(types.trex, result);\n    };\n\n    (function () {\n      var audioTrun, videoTrun, trunHeader; // This method assumes all samples are uniform. That is, if a\n      // duration is present for the first sample, it will be present for\n      // all subsequent samples.\n      // see ISO/IEC 14496-12:2012, Section 8.8.8.1\n\n      trunHeader = function trunHeader(samples, offset) {\n        var durationPresent = 0,\n            sizePresent = 0,\n            flagsPresent = 0,\n            compositionTimeOffset = 0; // trun flag constants\n\n        if (samples.length) {\n          if (samples[0].duration !== undefined) {\n            durationPresent = 0x1;\n          }\n\n          if (samples[0].size !== undefined) {\n            sizePresent = 0x2;\n          }\n\n          if (samples[0].flags !== undefined) {\n            flagsPresent = 0x4;\n          }\n\n          if (samples[0].compositionTimeOffset !== undefined) {\n            compositionTimeOffset = 0x8;\n          }\n        }\n\n        return [0x00, // version 0\n        0x00, durationPresent | sizePresent | flagsPresent | compositionTimeOffset, 0x01, // flags\n        (samples.length & 0xFF000000) >>> 24, (samples.length & 0xFF0000) >>> 16, (samples.length & 0xFF00) >>> 8, samples.length & 0xFF, // sample_count\n        (offset & 0xFF000000) >>> 24, (offset & 0xFF0000) >>> 16, (offset & 0xFF00) >>> 8, offset & 0xFF // data_offset\n        ];\n      };\n\n      videoTrun = function videoTrun(track, offset) {\n        var bytes, samples, sample, i;\n        samples = track.samples || [];\n        offset += 8 + 12 + 16 * samples.length;\n        bytes = trunHeader(samples, offset);\n\n        for (i = 0; i < samples.length; i++) {\n          sample = samples[i];\n          bytes = bytes.concat([(sample.duration & 0xFF000000) >>> 24, (sample.duration & 0xFF0000) >>> 16, (sample.duration & 0xFF00) >>> 8, sample.duration & 0xFF, // sample_duration\n          (sample.size & 0xFF000000) >>> 24, (sample.size & 0xFF0000) >>> 16, (sample.size & 0xFF00) >>> 8, sample.size & 0xFF, // sample_size\n          sample.flags.isLeading << 2 | sample.flags.dependsOn, sample.flags.isDependedOn << 6 | sample.flags.hasRedundancy << 4 | sample.flags.paddingValue << 1 | sample.flags.isNonSyncSample, sample.flags.degradationPriority & 0xF0 << 8, sample.flags.degradationPriority & 0x0F, // sample_flags\n          (sample.compositionTimeOffset & 0xFF000000) >>> 24, (sample.compositionTimeOffset & 0xFF0000) >>> 16, (sample.compositionTimeOffset & 0xFF00) >>> 8, sample.compositionTimeOffset & 0xFF // sample_composition_time_offset\n          ]);\n        }\n\n        return box(types.trun, new Uint8Array(bytes));\n      };\n\n      audioTrun = function audioTrun(track, offset) {\n        var bytes, samples, sample, i;\n        samples = track.samples || [];\n        offset += 8 + 12 + 8 * samples.length;\n        bytes = trunHeader(samples, offset);\n\n        for (i = 0; i < samples.length; i++) {\n          sample = samples[i];\n          bytes = bytes.concat([(sample.duration & 0xFF000000) >>> 24, (sample.duration & 0xFF0000) >>> 16, (sample.duration & 0xFF00) >>> 8, sample.duration & 0xFF, // sample_duration\n          (sample.size & 0xFF000000) >>> 24, (sample.size & 0xFF0000) >>> 16, (sample.size & 0xFF00) >>> 8, sample.size & 0xFF]); // sample_size\n        }\n\n        return box(types.trun, new Uint8Array(bytes));\n      };\n\n      trun = function trun(track, offset) {\n        if (track.type === 'audio') {\n          return audioTrun(track, offset);\n        }\n\n        return videoTrun(track, offset);\n      };\n    })();\n\n    var mp4Generator = {\n      ftyp: ftyp,\n      mdat: mdat,\n      moof: moof,\n      moov: moov,\n      initSegment: function initSegment(tracks) {\n        var fileType = ftyp(),\n            movie = moov(tracks),\n            result;\n        result = new Uint8Array(fileType.byteLength + movie.byteLength);\n        result.set(fileType);\n        result.set(movie, fileType.byteLength);\n        return result;\n      }\n    };\n    /**\n     * mux.js\n     *\n     * Copyright (c) Brightcove\n     * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n     */\n    // Convert an array of nal units into an array of frames with each frame being\n    // composed of the nal units that make up that frame\n    // Also keep track of cummulative data about the frame from the nal units such\n    // as the frame duration, starting pts, etc.\n\n    var groupNalsIntoFrames = function groupNalsIntoFrames(nalUnits) {\n      var i,\n          currentNal,\n          currentFrame = [],\n          frames = []; // TODO added for LHLS, make sure this is OK\n\n      frames.byteLength = 0;\n      frames.nalCount = 0;\n      frames.duration = 0;\n      currentFrame.byteLength = 0;\n\n      for (i = 0; i < nalUnits.length; i++) {\n        currentNal = nalUnits[i]; // Split on 'aud'-type nal units\n\n        if (currentNal.nalUnitType === 'access_unit_delimiter_rbsp') {\n          // Since the very first nal unit is expected to be an AUD\n          // only push to the frames array when currentFrame is not empty\n          if (currentFrame.length) {\n            currentFrame.duration = currentNal.dts - currentFrame.dts; // TODO added for LHLS, make sure this is OK\n\n            frames.byteLength += currentFrame.byteLength;\n            frames.nalCount += currentFrame.length;\n            frames.duration += currentFrame.duration;\n            frames.push(currentFrame);\n          }\n\n          currentFrame = [currentNal];\n          currentFrame.byteLength = currentNal.data.byteLength;\n          currentFrame.pts = currentNal.pts;\n          currentFrame.dts = currentNal.dts;\n        } else {\n          // Specifically flag key frames for ease of use later\n          if (currentNal.nalUnitType === 'slice_layer_without_partitioning_rbsp_idr') {\n            currentFrame.keyFrame = true;\n          }\n\n          currentFrame.duration = currentNal.dts - currentFrame.dts;\n          currentFrame.byteLength += currentNal.data.byteLength;\n          currentFrame.push(currentNal);\n        }\n      } // For the last frame, use the duration of the previous frame if we\n      // have nothing better to go on\n\n\n      if (frames.length && (!currentFrame.duration || currentFrame.duration <= 0)) {\n        currentFrame.duration = frames[frames.length - 1].duration;\n      } // Push the final frame\n      // TODO added for LHLS, make sure this is OK\n\n\n      frames.byteLength += currentFrame.byteLength;\n      frames.nalCount += currentFrame.length;\n      frames.duration += currentFrame.duration;\n      frames.push(currentFrame);\n      return frames;\n    }; // Convert an array of frames into an array of Gop with each Gop being composed\n    // of the frames that make up that Gop\n    // Also keep track of cummulative data about the Gop from the frames such as the\n    // Gop duration, starting pts, etc.\n\n\n    var groupFramesIntoGops = function groupFramesIntoGops(frames) {\n      var i,\n          currentFrame,\n          currentGop = [],\n          gops = []; // We must pre-set some of the values on the Gop since we\n      // keep running totals of these values\n\n      currentGop.byteLength = 0;\n      currentGop.nalCount = 0;\n      currentGop.duration = 0;\n      currentGop.pts = frames[0].pts;\n      currentGop.dts = frames[0].dts; // store some metadata about all the Gops\n\n      gops.byteLength = 0;\n      gops.nalCount = 0;\n      gops.duration = 0;\n      gops.pts = frames[0].pts;\n      gops.dts = frames[0].dts;\n\n      for (i = 0; i < frames.length; i++) {\n        currentFrame = frames[i];\n\n        if (currentFrame.keyFrame) {\n          // Since the very first frame is expected to be an keyframe\n          // only push to the gops array when currentGop is not empty\n          if (currentGop.length) {\n            gops.push(currentGop);\n            gops.byteLength += currentGop.byteLength;\n            gops.nalCount += currentGop.nalCount;\n            gops.duration += currentGop.duration;\n          }\n\n          currentGop = [currentFrame];\n          currentGop.nalCount = currentFrame.length;\n          currentGop.byteLength = currentFrame.byteLength;\n          currentGop.pts = currentFrame.pts;\n          currentGop.dts = currentFrame.dts;\n          currentGop.duration = currentFrame.duration;\n        } else {\n          currentGop.duration += currentFrame.duration;\n          currentGop.nalCount += currentFrame.length;\n          currentGop.byteLength += currentFrame.byteLength;\n          currentGop.push(currentFrame);\n        }\n      }\n\n      if (gops.length && currentGop.duration <= 0) {\n        currentGop.duration = gops[gops.length - 1].duration;\n      }\n\n      gops.byteLength += currentGop.byteLength;\n      gops.nalCount += currentGop.nalCount;\n      gops.duration += currentGop.duration; // push the final Gop\n\n      gops.push(currentGop);\n      return gops;\n    };\n    /*\n     * Search for the first keyframe in the GOPs and throw away all frames\n     * until that keyframe. Then extend the duration of the pulled keyframe\n     * and pull the PTS and DTS of the keyframe so that it covers the time\n     * range of the frames that were disposed.\n     *\n     * @param {Array} gops video GOPs\n     * @returns {Array} modified video GOPs\n     */\n\n\n    var extendFirstKeyFrame = function extendFirstKeyFrame(gops) {\n      var currentGop;\n\n      if (!gops[0][0].keyFrame && gops.length > 1) {\n        // Remove the first GOP\n        currentGop = gops.shift();\n        gops.byteLength -= currentGop.byteLength;\n        gops.nalCount -= currentGop.nalCount; // Extend the first frame of what is now the\n        // first gop to cover the time period of the\n        // frames we just removed\n\n        gops[0][0].dts = currentGop.dts;\n        gops[0][0].pts = currentGop.pts;\n        gops[0][0].duration += currentGop.duration;\n      }\n\n      return gops;\n    };\n    /**\n     * Default sample object\n     * see ISO/IEC 14496-12:2012, section 8.6.4.3\n     */\n\n\n    var createDefaultSample = function createDefaultSample() {\n      return {\n        size: 0,\n        flags: {\n          isLeading: 0,\n          dependsOn: 1,\n          isDependedOn: 0,\n          hasRedundancy: 0,\n          degradationPriority: 0,\n          isNonSyncSample: 1\n        }\n      };\n    };\n    /*\n     * Collates information from a video frame into an object for eventual\n     * entry into an MP4 sample table.\n     *\n     * @param {Object} frame the video frame\n     * @param {Number} dataOffset the byte offset to position the sample\n     * @return {Object} object containing sample table info for a frame\n     */\n\n\n    var sampleForFrame = function sampleForFrame(frame, dataOffset) {\n      var sample = createDefaultSample();\n      sample.dataOffset = dataOffset;\n      sample.compositionTimeOffset = frame.pts - frame.dts;\n      sample.duration = frame.duration;\n      sample.size = 4 * frame.length; // Space for nal unit size\n\n      sample.size += frame.byteLength;\n\n      if (frame.keyFrame) {\n        sample.flags.dependsOn = 2;\n        sample.flags.isNonSyncSample = 0;\n      }\n\n      return sample;\n    }; // generate the track's sample table from an array of gops\n\n\n    var generateSampleTable = function generateSampleTable(gops, baseDataOffset) {\n      var h,\n          i,\n          sample,\n          currentGop,\n          currentFrame,\n          dataOffset = baseDataOffset || 0,\n          samples = [];\n\n      for (h = 0; h < gops.length; h++) {\n        currentGop = gops[h];\n\n        for (i = 0; i < currentGop.length; i++) {\n          currentFrame = currentGop[i];\n          sample = sampleForFrame(currentFrame, dataOffset);\n          dataOffset += sample.size;\n          samples.push(sample);\n        }\n      }\n\n      return samples;\n    }; // generate the track's raw mdat data from an array of gops\n\n\n    var concatenateNalData = function concatenateNalData(gops) {\n      var h,\n          i,\n          j,\n          currentGop,\n          currentFrame,\n          currentNal,\n          dataOffset = 0,\n          nalsByteLength = gops.byteLength,\n          numberOfNals = gops.nalCount,\n          totalByteLength = nalsByteLength + 4 * numberOfNals,\n          data = new Uint8Array(totalByteLength),\n          view = new DataView(data.buffer); // For each Gop..\n\n      for (h = 0; h < gops.length; h++) {\n        currentGop = gops[h]; // For each Frame..\n\n        for (i = 0; i < currentGop.length; i++) {\n          currentFrame = currentGop[i]; // For each NAL..\n\n          for (j = 0; j < currentFrame.length; j++) {\n            currentNal = currentFrame[j];\n            view.setUint32(dataOffset, currentNal.data.byteLength);\n            dataOffset += 4;\n            data.set(currentNal.data, dataOffset);\n            dataOffset += currentNal.data.byteLength;\n          }\n        }\n      }\n\n      return data;\n    }; // generate the track's sample table from a frame\n\n\n    var generateSampleTableForFrame = function generateSampleTableForFrame(frame, baseDataOffset) {\n      var sample,\n          dataOffset = baseDataOffset || 0,\n          samples = [];\n      sample = sampleForFrame(frame, dataOffset);\n      samples.push(sample);\n      return samples;\n    }; // generate the track's raw mdat data from a frame\n\n\n    var concatenateNalDataForFrame = function concatenateNalDataForFrame(frame) {\n      var i,\n          currentNal,\n          dataOffset = 0,\n          nalsByteLength = frame.byteLength,\n          numberOfNals = frame.length,\n          totalByteLength = nalsByteLength + 4 * numberOfNals,\n          data = new Uint8Array(totalByteLength),\n          view = new DataView(data.buffer); // For each NAL..\n\n      for (i = 0; i < frame.length; i++) {\n        currentNal = frame[i];\n        view.setUint32(dataOffset, currentNal.data.byteLength);\n        dataOffset += 4;\n        data.set(currentNal.data, dataOffset);\n        dataOffset += currentNal.data.byteLength;\n      }\n\n      return data;\n    };\n\n    var frameUtils = {\n      groupNalsIntoFrames: groupNalsIntoFrames,\n      groupFramesIntoGops: groupFramesIntoGops,\n      extendFirstKeyFrame: extendFirstKeyFrame,\n      generateSampleTable: generateSampleTable,\n      concatenateNalData: concatenateNalData,\n      generateSampleTableForFrame: generateSampleTableForFrame,\n      concatenateNalDataForFrame: concatenateNalDataForFrame\n    };\n    /**\n     * mux.js\n     *\n     * Copyright (c) Brightcove\n     * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n     */\n\n    var highPrefix = [33, 16, 5, 32, 164, 27];\n    var lowPrefix = [33, 65, 108, 84, 1, 2, 4, 8, 168, 2, 4, 8, 17, 191, 252];\n\n    var zeroFill = function zeroFill(count) {\n      var a = [];\n\n      while (count--) {\n        a.push(0);\n      }\n\n      return a;\n    };\n\n    var makeTable = function makeTable(metaTable) {\n      return Object.keys(metaTable).reduce(function (obj, key) {\n        obj[key] = new Uint8Array(metaTable[key].reduce(function (arr, part) {\n          return arr.concat(part);\n        }, []));\n        return obj;\n      }, {});\n    }; // Frames-of-silence to use for filling in missing AAC frames\n\n\n    var coneOfSilence = {\n      96000: [highPrefix, [227, 64], zeroFill(154), [56]],\n      88200: [highPrefix, [231], zeroFill(170), [56]],\n      64000: [highPrefix, [248, 192], zeroFill(240), [56]],\n      48000: [highPrefix, [255, 192], zeroFill(268), [55, 148, 128], zeroFill(54), [112]],\n      44100: [highPrefix, [255, 192], zeroFill(268), [55, 163, 128], zeroFill(84), [112]],\n      32000: [highPrefix, [255, 192], zeroFill(268), [55, 234], zeroFill(226), [112]],\n      24000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 112], zeroFill(126), [224]],\n      16000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 255], zeroFill(269), [223, 108], zeroFill(195), [1, 192]],\n      12000: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 253, 128], zeroFill(259), [56]],\n      11025: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 255, 192], zeroFill(268), [55, 175, 128], zeroFill(108), [112]],\n      8000: [lowPrefix, zeroFill(268), [3, 121, 16], zeroFill(47), [7]]\n    };\n    var silence = makeTable(coneOfSilence);\n    /**\n     * mux.js\n     *\n     * Copyright (c) Brightcove\n     * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n     */\n\n    var ONE_SECOND_IN_TS = 90000,\n        // 90kHz clock\n    secondsToVideoTs,\n        secondsToAudioTs,\n        videoTsToSeconds,\n        audioTsToSeconds,\n        audioTsToVideoTs,\n        videoTsToAudioTs,\n        metadataTsToSeconds;\n\n    secondsToVideoTs = function secondsToVideoTs(seconds) {\n      return seconds * ONE_SECOND_IN_TS;\n    };\n\n    secondsToAudioTs = function secondsToAudioTs(seconds, sampleRate) {\n      return seconds * sampleRate;\n    };\n\n    videoTsToSeconds = function videoTsToSeconds(timestamp) {\n      return timestamp / ONE_SECOND_IN_TS;\n    };\n\n    audioTsToSeconds = function audioTsToSeconds(timestamp, sampleRate) {\n      return timestamp / sampleRate;\n    };\n\n    audioTsToVideoTs = function audioTsToVideoTs(timestamp, sampleRate) {\n      return secondsToVideoTs(audioTsToSeconds(timestamp, sampleRate));\n    };\n\n    videoTsToAudioTs = function videoTsToAudioTs(timestamp, sampleRate) {\n      return secondsToAudioTs(videoTsToSeconds(timestamp), sampleRate);\n    };\n    /**\n     * Adjust ID3 tag or caption timing information by the timeline pts values\n     * (if keepOriginalTimestamps is false) and convert to seconds\n     */\n\n\n    metadataTsToSeconds = function metadataTsToSeconds(timestamp, timelineStartPts, keepOriginalTimestamps) {\n      return videoTsToSeconds(keepOriginalTimestamps ? timestamp : timestamp - timelineStartPts);\n    };\n\n    var clock = {\n      ONE_SECOND_IN_TS: ONE_SECOND_IN_TS,\n      secondsToVideoTs: secondsToVideoTs,\n      secondsToAudioTs: secondsToAudioTs,\n      videoTsToSeconds: videoTsToSeconds,\n      audioTsToSeconds: audioTsToSeconds,\n      audioTsToVideoTs: audioTsToVideoTs,\n      videoTsToAudioTs: videoTsToAudioTs,\n      metadataTsToSeconds: metadataTsToSeconds\n    };\n    /**\n     * mux.js\n     *\n     * Copyright (c) Brightcove\n     * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n     */\n\n    /**\n     * Sum the `byteLength` properties of the data in each AAC frame\n     */\n\n    var sumFrameByteLengths = function sumFrameByteLengths(array) {\n      var i,\n          currentObj,\n          sum = 0; // sum the byteLength's all each nal unit in the frame\n\n      for (i = 0; i < array.length; i++) {\n        currentObj = array[i];\n        sum += currentObj.data.byteLength;\n      }\n\n      return sum;\n    }; // Possibly pad (prefix) the audio track with silence if appending this track\n    // would lead to the introduction of a gap in the audio buffer\n\n\n    var prefixWithSilence = function prefixWithSilence(track, frames, audioAppendStartTs, videoBaseMediaDecodeTime) {\n      var baseMediaDecodeTimeTs,\n          frameDuration = 0,\n          audioGapDuration = 0,\n          audioFillFrameCount = 0,\n          audioFillDuration = 0,\n          silentFrame,\n          i,\n          firstFrame;\n\n      if (!frames.length) {\n        return;\n      }\n\n      baseMediaDecodeTimeTs = clock.audioTsToVideoTs(track.baseMediaDecodeTime, track.samplerate); // determine frame clock duration based on sample rate, round up to avoid overfills\n\n      frameDuration = Math.ceil(clock.ONE_SECOND_IN_TS / (track.samplerate / 1024));\n\n      if (audioAppendStartTs && videoBaseMediaDecodeTime) {\n        // insert the shortest possible amount (audio gap or audio to video gap)\n        audioGapDuration = baseMediaDecodeTimeTs - Math.max(audioAppendStartTs, videoBaseMediaDecodeTime); // number of full frames in the audio gap\n\n        audioFillFrameCount = Math.floor(audioGapDuration / frameDuration);\n        audioFillDuration = audioFillFrameCount * frameDuration;\n      } // don't attempt to fill gaps smaller than a single frame or larger\n      // than a half second\n\n\n      if (audioFillFrameCount < 1 || audioFillDuration > clock.ONE_SECOND_IN_TS / 2) {\n        return;\n      }\n\n      silentFrame = silence[track.samplerate];\n\n      if (!silentFrame) {\n        // we don't have a silent frame pregenerated for the sample rate, so use a frame\n        // from the content instead\n        silentFrame = frames[0].data;\n      }\n\n      for (i = 0; i < audioFillFrameCount; i++) {\n        firstFrame = frames[0];\n        frames.splice(0, 0, {\n          data: silentFrame,\n          dts: firstFrame.dts - frameDuration,\n          pts: firstFrame.pts - frameDuration\n        });\n      }\n\n      track.baseMediaDecodeTime -= Math.floor(clock.videoTsToAudioTs(audioFillDuration, track.samplerate));\n    }; // If the audio segment extends before the earliest allowed dts\n    // value, remove AAC frames until starts at or after the earliest\n    // allowed DTS so that we don't end up with a negative baseMedia-\n    // DecodeTime for the audio track\n\n\n    var trimAdtsFramesByEarliestDts = function trimAdtsFramesByEarliestDts(adtsFrames, track, earliestAllowedDts) {\n      if (track.minSegmentDts >= earliestAllowedDts) {\n        return adtsFrames;\n      } // We will need to recalculate the earliest segment Dts\n\n\n      track.minSegmentDts = Infinity;\n      return adtsFrames.filter(function (currentFrame) {\n        // If this is an allowed frame, keep it and record it's Dts\n        if (currentFrame.dts >= earliestAllowedDts) {\n          track.minSegmentDts = Math.min(track.minSegmentDts, currentFrame.dts);\n          track.minSegmentPts = track.minSegmentDts;\n          return true;\n        } // Otherwise, discard it\n\n\n        return false;\n      });\n    }; // generate the track's raw mdat data from an array of frames\n\n\n    var generateSampleTable$1 = function generateSampleTable(frames) {\n      var i,\n          currentFrame,\n          samples = [];\n\n      for (i = 0; i < frames.length; i++) {\n        currentFrame = frames[i];\n        samples.push({\n          size: currentFrame.data.byteLength,\n          duration: 1024 // For AAC audio, all samples contain 1024 samples\n\n        });\n      }\n\n      return samples;\n    }; // generate the track's sample table from an array of frames\n\n\n    var concatenateFrameData = function concatenateFrameData(frames) {\n      var i,\n          currentFrame,\n          dataOffset = 0,\n          data = new Uint8Array(sumFrameByteLengths(frames));\n\n      for (i = 0; i < frames.length; i++) {\n        currentFrame = frames[i];\n        data.set(currentFrame.data, dataOffset);\n        dataOffset += currentFrame.data.byteLength;\n      }\n\n      return data;\n    };\n\n    var audioFrameUtils = {\n      prefixWithSilence: prefixWithSilence,\n      trimAdtsFramesByEarliestDts: trimAdtsFramesByEarliestDts,\n      generateSampleTable: generateSampleTable$1,\n      concatenateFrameData: concatenateFrameData\n    };\n    /**\n     * mux.js\n     *\n     * Copyright (c) Brightcove\n     * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n     */\n\n    var ONE_SECOND_IN_TS$1 = clock.ONE_SECOND_IN_TS;\n    /**\n     * Store information about the start and end of the track and the\n     * duration for each frame/sample we process in order to calculate\n     * the baseMediaDecodeTime\n     */\n\n    var collectDtsInfo = function collectDtsInfo(track, data) {\n      if (typeof data.pts === 'number') {\n        if (track.timelineStartInfo.pts === undefined) {\n          track.timelineStartInfo.pts = data.pts;\n        }\n\n        if (track.minSegmentPts === undefined) {\n          track.minSegmentPts = data.pts;\n        } else {\n          track.minSegmentPts = Math.min(track.minSegmentPts, data.pts);\n        }\n\n        if (track.maxSegmentPts === undefined) {\n          track.maxSegmentPts = data.pts;\n        } else {\n          track.maxSegmentPts = Math.max(track.maxSegmentPts, data.pts);\n        }\n      }\n\n      if (typeof data.dts === 'number') {\n        if (track.timelineStartInfo.dts === undefined) {\n          track.timelineStartInfo.dts = data.dts;\n        }\n\n        if (track.minSegmentDts === undefined) {\n          track.minSegmentDts = data.dts;\n        } else {\n          track.minSegmentDts = Math.min(track.minSegmentDts, data.dts);\n        }\n\n        if (track.maxSegmentDts === undefined) {\n          track.maxSegmentDts = data.dts;\n        } else {\n          track.maxSegmentDts = Math.max(track.maxSegmentDts, data.dts);\n        }\n      }\n    };\n    /**\n     * Clear values used to calculate the baseMediaDecodeTime between\n     * tracks\n     */\n\n\n    var clearDtsInfo = function clearDtsInfo(track) {\n      delete track.minSegmentDts;\n      delete track.maxSegmentDts;\n      delete track.minSegmentPts;\n      delete track.maxSegmentPts;\n    };\n    /**\n     * Calculate the track's baseMediaDecodeTime based on the earliest\n     * DTS the transmuxer has ever seen and the minimum DTS for the\n     * current track\n     * @param track {object} track metadata configuration\n     * @param keepOriginalTimestamps {boolean} If true, keep the timestamps\n     *        in the source; false to adjust the first segment to start at 0.\n     */\n\n\n    var calculateTrackBaseMediaDecodeTime = function calculateTrackBaseMediaDecodeTime(track, keepOriginalTimestamps) {\n      var baseMediaDecodeTime,\n          scale,\n          minSegmentDts = track.minSegmentDts; // Optionally adjust the time so the first segment starts at zero.\n\n      if (!keepOriginalTimestamps) {\n        minSegmentDts -= track.timelineStartInfo.dts;\n      } // track.timelineStartInfo.baseMediaDecodeTime is the location, in time, where\n      // we want the start of the first segment to be placed\n\n\n      baseMediaDecodeTime = track.timelineStartInfo.baseMediaDecodeTime; // Add to that the distance this segment is from the very first\n\n      baseMediaDecodeTime += minSegmentDts; // baseMediaDecodeTime must not become negative\n\n      baseMediaDecodeTime = Math.max(0, baseMediaDecodeTime);\n\n      if (track.type === 'audio') {\n        // Audio has a different clock equal to the sampling_rate so we need to\n        // scale the PTS values into the clock rate of the track\n        scale = track.samplerate / ONE_SECOND_IN_TS$1;\n        baseMediaDecodeTime *= scale;\n        baseMediaDecodeTime = Math.floor(baseMediaDecodeTime);\n      }\n\n      return baseMediaDecodeTime;\n    };\n\n    var trackDecodeInfo = {\n      clearDtsInfo: clearDtsInfo,\n      calculateTrackBaseMediaDecodeTime: calculateTrackBaseMediaDecodeTime,\n      collectDtsInfo: collectDtsInfo\n    };\n    /**\n     * mux.js\n     *\n     * Copyright (c) Brightcove\n     * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n     *\n     * Reads in-band caption information from a video elementary\n     * stream. Captions must follow the CEA-708 standard for injection\n     * into an MPEG-2 transport streams.\n     * @see https://en.wikipedia.org/wiki/CEA-708\n     * @see https://www.gpo.gov/fdsys/pkg/CFR-2007-title47-vol1/pdf/CFR-2007-title47-vol1-sec15-119.pdf\n     */\n    // Supplemental enhancement information (SEI) NAL units have a\n    // payload type field to indicate how they are to be\n    // interpreted. CEAS-708 caption content is always transmitted with\n    // payload type 0x04.\n\n    var USER_DATA_REGISTERED_ITU_T_T35 = 4,\n        RBSP_TRAILING_BITS = 128;\n    /**\n      * Parse a supplemental enhancement information (SEI) NAL unit.\n      * Stops parsing once a message of type ITU T T35 has been found.\n      *\n      * @param bytes {Uint8Array} the bytes of a SEI NAL unit\n      * @return {object} the parsed SEI payload\n      * @see Rec. ITU-T H.264, 7.3.2.3.1\n      */\n\n    var parseSei = function parseSei(bytes) {\n      var i = 0,\n          result = {\n        payloadType: -1,\n        payloadSize: 0\n      },\n          payloadType = 0,\n          payloadSize = 0; // go through the sei_rbsp parsing each each individual sei_message\n\n      while (i < bytes.byteLength) {\n        // stop once we have hit the end of the sei_rbsp\n        if (bytes[i] === RBSP_TRAILING_BITS) {\n          break;\n        } // Parse payload type\n\n\n        while (bytes[i] === 0xFF) {\n          payloadType += 255;\n          i++;\n        }\n\n        payloadType += bytes[i++]; // Parse payload size\n\n        while (bytes[i] === 0xFF) {\n          payloadSize += 255;\n          i++;\n        }\n\n        payloadSize += bytes[i++]; // this sei_message is a 608/708 caption so save it and break\n        // there can only ever be one caption message in a frame's sei\n\n        if (!result.payload && payloadType === USER_DATA_REGISTERED_ITU_T_T35) {\n          result.payloadType = payloadType;\n          result.payloadSize = payloadSize;\n          result.payload = bytes.subarray(i, i + payloadSize);\n          break;\n        } // skip the payload and parse the next message\n\n\n        i += payloadSize;\n        payloadType = 0;\n        payloadSize = 0;\n      }\n\n      return result;\n    }; // see ANSI/SCTE 128-1 (2013), section 8.1\n\n\n    var parseUserData = function parseUserData(sei) {\n      // itu_t_t35_contry_code must be 181 (United States) for\n      // captions\n      if (sei.payload[0] !== 181) {\n        return null;\n      } // itu_t_t35_provider_code should be 49 (ATSC) for captions\n\n\n      if ((sei.payload[1] << 8 | sei.payload[2]) !== 49) {\n        return null;\n      } // the user_identifier should be \"GA94\" to indicate ATSC1 data\n\n\n      if (String.fromCharCode(sei.payload[3], sei.payload[4], sei.payload[5], sei.payload[6]) !== 'GA94') {\n        return null;\n      } // finally, user_data_type_code should be 0x03 for caption data\n\n\n      if (sei.payload[7] !== 0x03) {\n        return null;\n      } // return the user_data_type_structure and strip the trailing\n      // marker bits\n\n\n      return sei.payload.subarray(8, sei.payload.length - 1);\n    }; // see CEA-708-D, section 4.4\n\n\n    var parseCaptionPackets = function parseCaptionPackets(pts, userData) {\n      var results = [],\n          i,\n          count,\n          offset,\n          data; // if this is just filler, return immediately\n\n      if (!(userData[0] & 0x40)) {\n        return results;\n      } // parse out the cc_data_1 and cc_data_2 fields\n\n\n      count = userData[0] & 0x1f;\n\n      for (i = 0; i < count; i++) {\n        offset = i * 3;\n        data = {\n          type: userData[offset + 2] & 0x03,\n          pts: pts\n        }; // capture cc data when cc_valid is 1\n\n        if (userData[offset + 2] & 0x04) {\n          data.ccData = userData[offset + 3] << 8 | userData[offset + 4];\n          results.push(data);\n        }\n      }\n\n      return results;\n    };\n\n    var discardEmulationPreventionBytes = function discardEmulationPreventionBytes(data) {\n      var length = data.byteLength,\n          emulationPreventionBytesPositions = [],\n          i = 1,\n          newLength,\n          newData; // Find all `Emulation Prevention Bytes`\n\n      while (i < length - 2) {\n        if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {\n          emulationPreventionBytesPositions.push(i + 2);\n          i += 2;\n        } else {\n          i++;\n        }\n      } // If no Emulation Prevention Bytes were found just return the original\n      // array\n\n\n      if (emulationPreventionBytesPositions.length === 0) {\n        return data;\n      } // Create a new array to hold the NAL unit data\n\n\n      newLength = length - emulationPreventionBytesPositions.length;\n      newData = new Uint8Array(newLength);\n      var sourceIndex = 0;\n\n      for (i = 0; i < newLength; sourceIndex++, i++) {\n        if (sourceIndex === emulationPreventionBytesPositions[0]) {\n          // Skip this byte\n          sourceIndex++; // Remove this position index\n\n          emulationPreventionBytesPositions.shift();\n        }\n\n        newData[i] = data[sourceIndex];\n      }\n\n      return newData;\n    }; // exports\n\n\n    var captionPacketParser = {\n      parseSei: parseSei,\n      parseUserData: parseUserData,\n      parseCaptionPackets: parseCaptionPackets,\n      discardEmulationPreventionBytes: discardEmulationPreventionBytes,\n      USER_DATA_REGISTERED_ITU_T_T35: USER_DATA_REGISTERED_ITU_T_T35\n    }; // -----------------\n    // Link To Transport\n    // -----------------\n\n    var CaptionStream = function CaptionStream() {\n      CaptionStream.prototype.init.call(this);\n      this.captionPackets_ = [];\n      this.ccStreams_ = [new Cea608Stream(0, 0), // eslint-disable-line no-use-before-define\n      new Cea608Stream(0, 1), // eslint-disable-line no-use-before-define\n      new Cea608Stream(1, 0), // eslint-disable-line no-use-before-define\n      new Cea608Stream(1, 1) // eslint-disable-line no-use-before-define\n      ];\n      this.reset(); // forward data and done events from CCs to this CaptionStream\n\n      this.ccStreams_.forEach(function (cc) {\n        cc.on('data', this.trigger.bind(this, 'data'));\n        cc.on('partialdone', this.trigger.bind(this, 'partialdone'));\n        cc.on('done', this.trigger.bind(this, 'done'));\n      }, this);\n    };\n\n    CaptionStream.prototype = new stream();\n\n    CaptionStream.prototype.push = function (event) {\n      var sei, userData, newCaptionPackets; // only examine SEI NALs\n\n      if (event.nalUnitType !== 'sei_rbsp') {\n        return;\n      } // parse the sei\n\n\n      sei = captionPacketParser.parseSei(event.escapedRBSP); // ignore everything but user_data_registered_itu_t_t35\n\n      if (sei.payloadType !== captionPacketParser.USER_DATA_REGISTERED_ITU_T_T35) {\n        return;\n      } // parse out the user data payload\n\n\n      userData = captionPacketParser.parseUserData(sei); // ignore unrecognized userData\n\n      if (!userData) {\n        return;\n      } // Sometimes, the same segment # will be downloaded twice. To stop the\n      // caption data from being processed twice, we track the latest dts we've\n      // received and ignore everything with a dts before that. However, since\n      // data for a specific dts can be split across packets on either side of\n      // a segment boundary, we need to make sure we *don't* ignore the packets\n      // from the *next* segment that have dts === this.latestDts_. By constantly\n      // tracking the number of packets received with dts === this.latestDts_, we\n      // know how many should be ignored once we start receiving duplicates.\n\n\n      if (event.dts < this.latestDts_) {\n        // We've started getting older data, so set the flag.\n        this.ignoreNextEqualDts_ = true;\n        return;\n      } else if (event.dts === this.latestDts_ && this.ignoreNextEqualDts_) {\n        this.numSameDts_--;\n\n        if (!this.numSameDts_) {\n          // We've received the last duplicate packet, time to start processing again\n          this.ignoreNextEqualDts_ = false;\n        }\n\n        return;\n      } // parse out CC data packets and save them for later\n\n\n      newCaptionPackets = captionPacketParser.parseCaptionPackets(event.pts, userData);\n      this.captionPackets_ = this.captionPackets_.concat(newCaptionPackets);\n\n      if (this.latestDts_ !== event.dts) {\n        this.numSameDts_ = 0;\n      }\n\n      this.numSameDts_++;\n      this.latestDts_ = event.dts;\n    };\n\n    CaptionStream.prototype.flushCCStreams = function (flushType) {\n      this.ccStreams_.forEach(function (cc) {\n        return flushType === 'flush' ? cc.flush() : cc.partialFlush();\n      }, this);\n    };\n\n    CaptionStream.prototype.flushStream = function (flushType) {\n      // make sure we actually parsed captions before proceeding\n      if (!this.captionPackets_.length) {\n        this.flushCCStreams(flushType);\n        return;\n      } // In Chrome, the Array#sort function is not stable so add a\n      // presortIndex that we can use to ensure we get a stable-sort\n\n\n      this.captionPackets_.forEach(function (elem, idx) {\n        elem.presortIndex = idx;\n      }); // sort caption byte-pairs based on their PTS values\n\n      this.captionPackets_.sort(function (a, b) {\n        if (a.pts === b.pts) {\n          return a.presortIndex - b.presortIndex;\n        }\n\n        return a.pts - b.pts;\n      });\n      this.captionPackets_.forEach(function (packet) {\n        if (packet.type < 2) {\n          // Dispatch packet to the right Cea608Stream\n          this.dispatchCea608Packet(packet);\n        } // this is where an 'else' would go for a dispatching packets\n        // to a theoretical Cea708Stream that handles SERVICEn data\n\n      }, this);\n      this.captionPackets_.length = 0;\n      this.flushCCStreams(flushType);\n    };\n\n    CaptionStream.prototype.flush = function () {\n      return this.flushStream('flush');\n    }; // Only called if handling partial data\n\n\n    CaptionStream.prototype.partialFlush = function () {\n      return this.flushStream('partialFlush');\n    };\n\n    CaptionStream.prototype.reset = function () {\n      this.latestDts_ = null;\n      this.ignoreNextEqualDts_ = false;\n      this.numSameDts_ = 0;\n      this.activeCea608Channel_ = [null, null];\n      this.ccStreams_.forEach(function (ccStream) {\n        ccStream.reset();\n      });\n    }; // From the CEA-608 spec:\n\n    /*\n     * When XDS sub-packets are interleaved with other services, the end of each sub-packet shall be followed\n     * by a control pair to change to a different service. When any of the control codes from 0x10 to 0x1F is\n     * used to begin a control code pair, it indicates the return to captioning or Text data. The control code pair\n     * and subsequent data should then be processed according to the FCC rules. It may be necessary for the\n     * line 21 data encoder to automatically insert a control code pair (i.e. RCL, RU2, RU3, RU4, RDC, or RTD)\n     * to switch to captioning or Text.\n    */\n    // With that in mind, we ignore any data between an XDS control code and a\n    // subsequent closed-captioning control code.\n\n\n    CaptionStream.prototype.dispatchCea608Packet = function (packet) {\n      // NOTE: packet.type is the CEA608 field\n      if (this.setsTextOrXDSActive(packet)) {\n        this.activeCea608Channel_[packet.type] = null;\n      } else if (this.setsChannel1Active(packet)) {\n        this.activeCea608Channel_[packet.type] = 0;\n      } else if (this.setsChannel2Active(packet)) {\n        this.activeCea608Channel_[packet.type] = 1;\n      }\n\n      if (this.activeCea608Channel_[packet.type] === null) {\n        // If we haven't received anything to set the active channel, or the\n        // packets are Text/XDS data, discard the data; we don't want jumbled\n        // captions\n        return;\n      }\n\n      this.ccStreams_[(packet.type << 1) + this.activeCea608Channel_[packet.type]].push(packet);\n    };\n\n    CaptionStream.prototype.setsChannel1Active = function (packet) {\n      return (packet.ccData & 0x7800) === 0x1000;\n    };\n\n    CaptionStream.prototype.setsChannel2Active = function (packet) {\n      return (packet.ccData & 0x7800) === 0x1800;\n    };\n\n    CaptionStream.prototype.setsTextOrXDSActive = function (packet) {\n      return (packet.ccData & 0x7100) === 0x0100 || (packet.ccData & 0x78fe) === 0x102a || (packet.ccData & 0x78fe) === 0x182a;\n    }; // ----------------------\n    // Session to Application\n    // ----------------------\n    // This hash maps non-ASCII, special, and extended character codes to their\n    // proper Unicode equivalent. The first keys that are only a single byte\n    // are the non-standard ASCII characters, which simply map the CEA608 byte\n    // to the standard ASCII/Unicode. The two-byte keys that follow are the CEA608\n    // character codes, but have their MSB bitmasked with 0x03 so that a lookup\n    // can be performed regardless of the field and data channel on which the\n    // character code was received.\n\n\n    var CHARACTER_TRANSLATION = {\n      0x2a: 0xe1,\n      // á\n      0x5c: 0xe9,\n      // é\n      0x5e: 0xed,\n      // í\n      0x5f: 0xf3,\n      // ó\n      0x60: 0xfa,\n      // ú\n      0x7b: 0xe7,\n      // ç\n      0x7c: 0xf7,\n      // ÷\n      0x7d: 0xd1,\n      // Ñ\n      0x7e: 0xf1,\n      // ñ\n      0x7f: 0x2588,\n      // █\n      0x0130: 0xae,\n      // ®\n      0x0131: 0xb0,\n      // °\n      0x0132: 0xbd,\n      // ½\n      0x0133: 0xbf,\n      // ¿\n      0x0134: 0x2122,\n      // ™\n      0x0135: 0xa2,\n      // ¢\n      0x0136: 0xa3,\n      // £\n      0x0137: 0x266a,\n      // ♪\n      0x0138: 0xe0,\n      // à\n      0x0139: 0xa0,\n      //\n      0x013a: 0xe8,\n      // è\n      0x013b: 0xe2,\n      // â\n      0x013c: 0xea,\n      // ê\n      0x013d: 0xee,\n      // î\n      0x013e: 0xf4,\n      // ô\n      0x013f: 0xfb,\n      // û\n      0x0220: 0xc1,\n      // Á\n      0x0221: 0xc9,\n      // É\n      0x0222: 0xd3,\n      // Ó\n      0x0223: 0xda,\n      // Ú\n      0x0224: 0xdc,\n      // Ü\n      0x0225: 0xfc,\n      // ü\n      0x0226: 0x2018,\n      // ‘\n      0x0227: 0xa1,\n      // ¡\n      0x0228: 0x2a,\n      // *\n      0x0229: 0x27,\n      // '\n      0x022a: 0x2014,\n      // —\n      0x022b: 0xa9,\n      // ©\n      0x022c: 0x2120,\n      // ℠\n      0x022d: 0x2022,\n      // •\n      0x022e: 0x201c,\n      // “\n      0x022f: 0x201d,\n      // ”\n      0x0230: 0xc0,\n      // À\n      0x0231: 0xc2,\n      // Â\n      0x0232: 0xc7,\n      // Ç\n      0x0233: 0xc8,\n      // È\n      0x0234: 0xca,\n      // Ê\n      0x0235: 0xcb,\n      // Ë\n      0x0236: 0xeb,\n      // ë\n      0x0237: 0xce,\n      // Î\n      0x0238: 0xcf,\n      // Ï\n      0x0239: 0xef,\n      // ï\n      0x023a: 0xd4,\n      // Ô\n      0x023b: 0xd9,\n      // Ù\n      0x023c: 0xf9,\n      // ù\n      0x023d: 0xdb,\n      // Û\n      0x023e: 0xab,\n      // «\n      0x023f: 0xbb,\n      // »\n      0x0320: 0xc3,\n      // Ã\n      0x0321: 0xe3,\n      // ã\n      0x0322: 0xcd,\n      // Í\n      0x0323: 0xcc,\n      // Ì\n      0x0324: 0xec,\n      // ì\n      0x0325: 0xd2,\n      // Ò\n      0x0326: 0xf2,\n      // ò\n      0x0327: 0xd5,\n      // Õ\n      0x0328: 0xf5,\n      // õ\n      0x0329: 0x7b,\n      // {\n      0x032a: 0x7d,\n      // }\n      0x032b: 0x5c,\n      // \\\n      0x032c: 0x5e,\n      // ^\n      0x032d: 0x5f,\n      // _\n      0x032e: 0x7c,\n      // |\n      0x032f: 0x7e,\n      // ~\n      0x0330: 0xc4,\n      // Ä\n      0x0331: 0xe4,\n      // ä\n      0x0332: 0xd6,\n      // Ö\n      0x0333: 0xf6,\n      // ö\n      0x0334: 0xdf,\n      // ß\n      0x0335: 0xa5,\n      // ¥\n      0x0336: 0xa4,\n      // ¤\n      0x0337: 0x2502,\n      // │\n      0x0338: 0xc5,\n      // Å\n      0x0339: 0xe5,\n      // å\n      0x033a: 0xd8,\n      // Ø\n      0x033b: 0xf8,\n      // ø\n      0x033c: 0x250c,\n      // ┌\n      0x033d: 0x2510,\n      // ┐\n      0x033e: 0x2514,\n      // └\n      0x033f: 0x2518 // ┘\n\n    };\n\n    var getCharFromCode = function getCharFromCode(code) {\n      if (code === null) {\n        return '';\n      }\n\n      code = CHARACTER_TRANSLATION[code] || code;\n      return String.fromCharCode(code);\n    }; // the index of the last row in a CEA-608 display buffer\n\n\n    var BOTTOM_ROW = 14; // This array is used for mapping PACs -> row #, since there's no way of\n    // getting it through bit logic.\n\n    var ROWS = [0x1100, 0x1120, 0x1200, 0x1220, 0x1500, 0x1520, 0x1600, 0x1620, 0x1700, 0x1720, 0x1000, 0x1300, 0x1320, 0x1400, 0x1420]; // CEA-608 captions are rendered onto a 34x15 matrix of character\n    // cells. The \"bottom\" row is the last element in the outer array.\n\n    var createDisplayBuffer = function createDisplayBuffer() {\n      var result = [],\n          i = BOTTOM_ROW + 1;\n\n      while (i--) {\n        result.push('');\n      }\n\n      return result;\n    };\n\n    var Cea608Stream = function Cea608Stream(field, dataChannel) {\n      Cea608Stream.prototype.init.call(this);\n      this.field_ = field || 0;\n      this.dataChannel_ = dataChannel || 0;\n      this.name_ = 'CC' + ((this.field_ << 1 | this.dataChannel_) + 1);\n      this.setConstants();\n      this.reset();\n\n      this.push = function (packet) {\n        var data, swap, char0, char1, text; // remove the parity bits\n\n        data = packet.ccData & 0x7f7f; // ignore duplicate control codes; the spec demands they're sent twice\n\n        if (data === this.lastControlCode_) {\n          this.lastControlCode_ = null;\n          return;\n        } // Store control codes\n\n\n        if ((data & 0xf000) === 0x1000) {\n          this.lastControlCode_ = data;\n        } else if (data !== this.PADDING_) {\n          this.lastControlCode_ = null;\n        }\n\n        char0 = data >>> 8;\n        char1 = data & 0xff;\n\n        if (data === this.PADDING_) {\n          return;\n        } else if (data === this.RESUME_CAPTION_LOADING_) {\n          this.mode_ = 'popOn';\n        } else if (data === this.END_OF_CAPTION_) {\n          // If an EOC is received while in paint-on mode, the displayed caption\n          // text should be swapped to non-displayed memory as if it was a pop-on\n          // caption. Because of that, we should explicitly switch back to pop-on\n          // mode\n          this.mode_ = 'popOn';\n          this.clearFormatting(packet.pts); // if a caption was being displayed, it's gone now\n\n          this.flushDisplayed(packet.pts); // flip memory\n\n          swap = this.displayed_;\n          this.displayed_ = this.nonDisplayed_;\n          this.nonDisplayed_ = swap; // start measuring the time to display the caption\n\n          this.startPts_ = packet.pts;\n        } else if (data === this.ROLL_UP_2_ROWS_) {\n          this.rollUpRows_ = 2;\n          this.setRollUp(packet.pts);\n        } else if (data === this.ROLL_UP_3_ROWS_) {\n          this.rollUpRows_ = 3;\n          this.setRollUp(packet.pts);\n        } else if (data === this.ROLL_UP_4_ROWS_) {\n          this.rollUpRows_ = 4;\n          this.setRollUp(packet.pts);\n        } else if (data === this.CARRIAGE_RETURN_) {\n          this.clearFormatting(packet.pts);\n          this.flushDisplayed(packet.pts);\n          this.shiftRowsUp_();\n          this.startPts_ = packet.pts;\n        } else if (data === this.BACKSPACE_) {\n          if (this.mode_ === 'popOn') {\n            this.nonDisplayed_[this.row_] = this.nonDisplayed_[this.row_].slice(0, -1);\n          } else {\n            this.displayed_[this.row_] = this.displayed_[this.row_].slice(0, -1);\n          }\n        } else if (data === this.ERASE_DISPLAYED_MEMORY_) {\n          this.flushDisplayed(packet.pts);\n          this.displayed_ = createDisplayBuffer();\n        } else if (data === this.ERASE_NON_DISPLAYED_MEMORY_) {\n          this.nonDisplayed_ = createDisplayBuffer();\n        } else if (data === this.RESUME_DIRECT_CAPTIONING_) {\n          if (this.mode_ !== 'paintOn') {\n            // NOTE: This should be removed when proper caption positioning is\n            // implemented\n            this.flushDisplayed(packet.pts);\n            this.displayed_ = createDisplayBuffer();\n          }\n\n          this.mode_ = 'paintOn';\n          this.startPts_ = packet.pts; // Append special characters to caption text\n        } else if (this.isSpecialCharacter(char0, char1)) {\n          // Bitmask char0 so that we can apply character transformations\n          // regardless of field and data channel.\n          // Then byte-shift to the left and OR with char1 so we can pass the\n          // entire character code to `getCharFromCode`.\n          char0 = (char0 & 0x03) << 8;\n          text = getCharFromCode(char0 | char1);\n          this[this.mode_](packet.pts, text);\n          this.column_++; // Append extended characters to caption text\n        } else if (this.isExtCharacter(char0, char1)) {\n          // Extended characters always follow their \"non-extended\" equivalents.\n          // IE if a \"è\" is desired, you'll always receive \"eè\"; non-compliant\n          // decoders are supposed to drop the \"è\", while compliant decoders\n          // backspace the \"e\" and insert \"è\".\n          // Delete the previous character\n          if (this.mode_ === 'popOn') {\n            this.nonDisplayed_[this.row_] = this.nonDisplayed_[this.row_].slice(0, -1);\n          } else {\n            this.displayed_[this.row_] = this.displayed_[this.row_].slice(0, -1);\n          } // Bitmask char0 so that we can apply character transformations\n          // regardless of field and data channel.\n          // Then byte-shift to the left and OR with char1 so we can pass the\n          // entire character code to `getCharFromCode`.\n\n\n          char0 = (char0 & 0x03) << 8;\n          text = getCharFromCode(char0 | char1);\n          this[this.mode_](packet.pts, text);\n          this.column_++; // Process mid-row codes\n        } else if (this.isMidRowCode(char0, char1)) {\n          // Attributes are not additive, so clear all formatting\n          this.clearFormatting(packet.pts); // According to the standard, mid-row codes\n          // should be replaced with spaces, so add one now\n\n          this[this.mode_](packet.pts, ' ');\n          this.column_++;\n\n          if ((char1 & 0xe) === 0xe) {\n            this.addFormatting(packet.pts, ['i']);\n          }\n\n          if ((char1 & 0x1) === 0x1) {\n            this.addFormatting(packet.pts, ['u']);\n          } // Detect offset control codes and adjust cursor\n\n        } else if (this.isOffsetControlCode(char0, char1)) {\n          // Cursor position is set by indent PAC (see below) in 4-column\n          // increments, with an additional offset code of 1-3 to reach any\n          // of the 32 columns specified by CEA-608. So all we need to do\n          // here is increment the column cursor by the given offset.\n          this.column_ += char1 & 0x03; // Detect PACs (Preamble Address Codes)\n        } else if (this.isPAC(char0, char1)) {\n          // There's no logic for PAC -> row mapping, so we have to just\n          // find the row code in an array and use its index :(\n          var row = ROWS.indexOf(data & 0x1f20); // Configure the caption window if we're in roll-up mode\n\n          if (this.mode_ === 'rollUp') {\n            // This implies that the base row is incorrectly set.\n            // As per the recommendation in CEA-608(Base Row Implementation), defer to the number\n            // of roll-up rows set.\n            if (row - this.rollUpRows_ + 1 < 0) {\n              row = this.rollUpRows_ - 1;\n            }\n\n            this.setRollUp(packet.pts, row);\n          }\n\n          if (row !== this.row_) {\n            // formatting is only persistent for current row\n            this.clearFormatting(packet.pts);\n            this.row_ = row;\n          } // All PACs can apply underline, so detect and apply\n          // (All odd-numbered second bytes set underline)\n\n\n          if (char1 & 0x1 && this.formatting_.indexOf('u') === -1) {\n            this.addFormatting(packet.pts, ['u']);\n          }\n\n          if ((data & 0x10) === 0x10) {\n            // We've got an indent level code. Each successive even number\n            // increments the column cursor by 4, so we can get the desired\n            // column position by bit-shifting to the right (to get n/2)\n            // and multiplying by 4.\n            this.column_ = ((data & 0xe) >> 1) * 4;\n          }\n\n          if (this.isColorPAC(char1)) {\n            // it's a color code, though we only support white, which\n            // can be either normal or italicized. white italics can be\n            // either 0x4e or 0x6e depending on the row, so we just\n            // bitwise-and with 0xe to see if italics should be turned on\n            if ((char1 & 0xe) === 0xe) {\n              this.addFormatting(packet.pts, ['i']);\n            }\n          } // We have a normal character in char0, and possibly one in char1\n\n        } else if (this.isNormalChar(char0)) {\n          if (char1 === 0x00) {\n            char1 = null;\n          }\n\n          text = getCharFromCode(char0);\n          text += getCharFromCode(char1);\n          this[this.mode_](packet.pts, text);\n          this.column_ += text.length;\n        } // finish data processing\n\n      };\n    };\n\n    Cea608Stream.prototype = new stream(); // Trigger a cue point that captures the current state of the\n    // display buffer\n\n    Cea608Stream.prototype.flushDisplayed = function (pts) {\n      var content = this.displayed_ // remove spaces from the start and end of the string\n      .map(function (row) {\n        try {\n          return row.trim();\n        } catch (e) {\n          // Ordinarily, this shouldn't happen. However, caption\n          // parsing errors should not throw exceptions and\n          // break playback.\n          // eslint-disable-next-line no-console\n          console.error('Skipping malformed caption.');\n          return '';\n        }\n      }) // combine all text rows to display in one cue\n      .join('\\n') // and remove blank rows from the start and end, but not the middle\n      .replace(/^\\n+|\\n+$/g, '');\n\n      if (content.length) {\n        this.trigger('data', {\n          startPts: this.startPts_,\n          endPts: pts,\n          text: content,\n          stream: this.name_\n        });\n      }\n    };\n    /**\n     * Zero out the data, used for startup and on seek\n     */\n\n\n    Cea608Stream.prototype.reset = function () {\n      this.mode_ = 'popOn'; // When in roll-up mode, the index of the last row that will\n      // actually display captions. If a caption is shifted to a row\n      // with a lower index than this, it is cleared from the display\n      // buffer\n\n      this.topRow_ = 0;\n      this.startPts_ = 0;\n      this.displayed_ = createDisplayBuffer();\n      this.nonDisplayed_ = createDisplayBuffer();\n      this.lastControlCode_ = null; // Track row and column for proper line-breaking and spacing\n\n      this.column_ = 0;\n      this.row_ = BOTTOM_ROW;\n      this.rollUpRows_ = 2; // This variable holds currently-applied formatting\n\n      this.formatting_ = [];\n    };\n    /**\n     * Sets up control code and related constants for this instance\n     */\n\n\n    Cea608Stream.prototype.setConstants = function () {\n      // The following attributes have these uses:\n      // ext_ :    char0 for mid-row codes, and the base for extended\n      //           chars (ext_+0, ext_+1, and ext_+2 are char0s for\n      //           extended codes)\n      // control_: char0 for control codes, except byte-shifted to the\n      //           left so that we can do this.control_ | CONTROL_CODE\n      // offset_:  char0 for tab offset codes\n      //\n      // It's also worth noting that control codes, and _only_ control codes,\n      // differ between field 1 and field2. Field 2 control codes are always\n      // their field 1 value plus 1. That's why there's the \"| field\" on the\n      // control value.\n      if (this.dataChannel_ === 0) {\n        this.BASE_ = 0x10;\n        this.EXT_ = 0x11;\n        this.CONTROL_ = (0x14 | this.field_) << 8;\n        this.OFFSET_ = 0x17;\n      } else if (this.dataChannel_ === 1) {\n        this.BASE_ = 0x18;\n        this.EXT_ = 0x19;\n        this.CONTROL_ = (0x1c | this.field_) << 8;\n        this.OFFSET_ = 0x1f;\n      } // Constants for the LSByte command codes recognized by Cea608Stream. This\n      // list is not exhaustive. For a more comprehensive listing and semantics see\n      // http://www.gpo.gov/fdsys/pkg/CFR-2010-title47-vol1/pdf/CFR-2010-title47-vol1-sec15-119.pdf\n      // Padding\n\n\n      this.PADDING_ = 0x0000; // Pop-on Mode\n\n      this.RESUME_CAPTION_LOADING_ = this.CONTROL_ | 0x20;\n      this.END_OF_CAPTION_ = this.CONTROL_ | 0x2f; // Roll-up Mode\n\n      this.ROLL_UP_2_ROWS_ = this.CONTROL_ | 0x25;\n      this.ROLL_UP_3_ROWS_ = this.CONTROL_ | 0x26;\n      this.ROLL_UP_4_ROWS_ = this.CONTROL_ | 0x27;\n      this.CARRIAGE_RETURN_ = this.CONTROL_ | 0x2d; // paint-on mode\n\n      this.RESUME_DIRECT_CAPTIONING_ = this.CONTROL_ | 0x29; // Erasure\n\n      this.BACKSPACE_ = this.CONTROL_ | 0x21;\n      this.ERASE_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2c;\n      this.ERASE_NON_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2e;\n    };\n    /**\n     * Detects if the 2-byte packet data is a special character\n     *\n     * Special characters have a second byte in the range 0x30 to 0x3f,\n     * with the first byte being 0x11 (for data channel 1) or 0x19 (for\n     * data channel 2).\n     *\n     * @param  {Integer} char0 The first byte\n     * @param  {Integer} char1 The second byte\n     * @return {Boolean}       Whether the 2 bytes are an special character\n     */\n\n\n    Cea608Stream.prototype.isSpecialCharacter = function (char0, char1) {\n      return char0 === this.EXT_ && char1 >= 0x30 && char1 <= 0x3f;\n    };\n    /**\n     * Detects if the 2-byte packet data is an extended character\n     *\n     * Extended characters have a second byte in the range 0x20 to 0x3f,\n     * with the first byte being 0x12 or 0x13 (for data channel 1) or\n     * 0x1a or 0x1b (for data channel 2).\n     *\n     * @param  {Integer} char0 The first byte\n     * @param  {Integer} char1 The second byte\n     * @return {Boolean}       Whether the 2 bytes are an extended character\n     */\n\n\n    Cea608Stream.prototype.isExtCharacter = function (char0, char1) {\n      return (char0 === this.EXT_ + 1 || char0 === this.EXT_ + 2) && char1 >= 0x20 && char1 <= 0x3f;\n    };\n    /**\n     * Detects if the 2-byte packet is a mid-row code\n     *\n     * Mid-row codes have a second byte in the range 0x20 to 0x2f, with\n     * the first byte being 0x11 (for data channel 1) or 0x19 (for data\n     * channel 2).\n     *\n     * @param  {Integer} char0 The first byte\n     * @param  {Integer} char1 The second byte\n     * @return {Boolean}       Whether the 2 bytes are a mid-row code\n     */\n\n\n    Cea608Stream.prototype.isMidRowCode = function (char0, char1) {\n      return char0 === this.EXT_ && char1 >= 0x20 && char1 <= 0x2f;\n    };\n    /**\n     * Detects if the 2-byte packet is an offset control code\n     *\n     * Offset control codes have a second byte in the range 0x21 to 0x23,\n     * with the first byte being 0x17 (for data channel 1) or 0x1f (for\n     * data channel 2).\n     *\n     * @param  {Integer} char0 The first byte\n     * @param  {Integer} char1 The second byte\n     * @return {Boolean}       Whether the 2 bytes are an offset control code\n     */\n\n\n    Cea608Stream.prototype.isOffsetControlCode = function (char0, char1) {\n      return char0 === this.OFFSET_ && char1 >= 0x21 && char1 <= 0x23;\n    };\n    /**\n     * Detects if the 2-byte packet is a Preamble Address Code\n     *\n     * PACs have a first byte in the range 0x10 to 0x17 (for data channel 1)\n     * or 0x18 to 0x1f (for data channel 2), with the second byte in the\n     * range 0x40 to 0x7f.\n     *\n     * @param  {Integer} char0 The first byte\n     * @param  {Integer} char1 The second byte\n     * @return {Boolean}       Whether the 2 bytes are a PAC\n     */\n\n\n    Cea608Stream.prototype.isPAC = function (char0, char1) {\n      return char0 >= this.BASE_ && char0 < this.BASE_ + 8 && char1 >= 0x40 && char1 <= 0x7f;\n    };\n    /**\n     * Detects if a packet's second byte is in the range of a PAC color code\n     *\n     * PAC color codes have the second byte be in the range 0x40 to 0x4f, or\n     * 0x60 to 0x6f.\n     *\n     * @param  {Integer} char1 The second byte\n     * @return {Boolean}       Whether the byte is a color PAC\n     */\n\n\n    Cea608Stream.prototype.isColorPAC = function (char1) {\n      return char1 >= 0x40 && char1 <= 0x4f || char1 >= 0x60 && char1 <= 0x7f;\n    };\n    /**\n     * Detects if a single byte is in the range of a normal character\n     *\n     * Normal text bytes are in the range 0x20 to 0x7f.\n     *\n     * @param  {Integer} char  The byte\n     * @return {Boolean}       Whether the byte is a normal character\n     */\n\n\n    Cea608Stream.prototype.isNormalChar = function (_char) {\n      return _char >= 0x20 && _char <= 0x7f;\n    };\n    /**\n     * Configures roll-up\n     *\n     * @param  {Integer} pts         Current PTS\n     * @param  {Integer} newBaseRow  Used by PACs to slide the current window to\n     *                               a new position\n     */\n\n\n    Cea608Stream.prototype.setRollUp = function (pts, newBaseRow) {\n      // Reset the base row to the bottom row when switching modes\n      if (this.mode_ !== 'rollUp') {\n        this.row_ = BOTTOM_ROW;\n        this.mode_ = 'rollUp'; // Spec says to wipe memories when switching to roll-up\n\n        this.flushDisplayed(pts);\n        this.nonDisplayed_ = createDisplayBuffer();\n        this.displayed_ = createDisplayBuffer();\n      }\n\n      if (newBaseRow !== undefined && newBaseRow !== this.row_) {\n        // move currently displayed captions (up or down) to the new base row\n        for (var i = 0; i < this.rollUpRows_; i++) {\n          this.displayed_[newBaseRow - i] = this.displayed_[this.row_ - i];\n          this.displayed_[this.row_ - i] = '';\n        }\n      }\n\n      if (newBaseRow === undefined) {\n        newBaseRow = this.row_;\n      }\n\n      this.topRow_ = newBaseRow - this.rollUpRows_ + 1;\n    }; // Adds the opening HTML tag for the passed character to the caption text,\n    // and keeps track of it for later closing\n\n\n    Cea608Stream.prototype.addFormatting = function (pts, format) {\n      this.formatting_ = this.formatting_.concat(format);\n      var text = format.reduce(function (text, format) {\n        return text + '<' + format + '>';\n      }, '');\n      this[this.mode_](pts, text);\n    }; // Adds HTML closing tags for current formatting to caption text and\n    // clears remembered formatting\n\n\n    Cea608Stream.prototype.clearFormatting = function (pts) {\n      if (!this.formatting_.length) {\n        return;\n      }\n\n      var text = this.formatting_.reverse().reduce(function (text, format) {\n        return text + '</' + format + '>';\n      }, '');\n      this.formatting_ = [];\n      this[this.mode_](pts, text);\n    }; // Mode Implementations\n\n\n    Cea608Stream.prototype.popOn = function (pts, text) {\n      var baseRow = this.nonDisplayed_[this.row_]; // buffer characters\n\n      baseRow += text;\n      this.nonDisplayed_[this.row_] = baseRow;\n    };\n\n    Cea608Stream.prototype.rollUp = function (pts, text) {\n      var baseRow = this.displayed_[this.row_];\n      baseRow += text;\n      this.displayed_[this.row_] = baseRow;\n    };\n\n    Cea608Stream.prototype.shiftRowsUp_ = function () {\n      var i; // clear out inactive rows\n\n      for (i = 0; i < this.topRow_; i++) {\n        this.displayed_[i] = '';\n      }\n\n      for (i = this.row_ + 1; i < BOTTOM_ROW + 1; i++) {\n        this.displayed_[i] = '';\n      } // shift displayed rows up\n\n\n      for (i = this.topRow_; i < this.row_; i++) {\n        this.displayed_[i] = this.displayed_[i + 1];\n      } // clear out the bottom row\n\n\n      this.displayed_[this.row_] = '';\n    };\n\n    Cea608Stream.prototype.paintOn = function (pts, text) {\n      var baseRow = this.displayed_[this.row_];\n      baseRow += text;\n      this.displayed_[this.row_] = baseRow;\n    }; // exports\n\n\n    var captionStream = {\n      CaptionStream: CaptionStream,\n      Cea608Stream: Cea608Stream\n    };\n    /**\n     * mux.js\n     *\n     * Copyright (c) Brightcove\n     * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n     */\n\n    var streamTypes = {\n      H264_STREAM_TYPE: 0x1B,\n      ADTS_STREAM_TYPE: 0x0F,\n      METADATA_STREAM_TYPE: 0x15\n    };\n    var MAX_TS = 8589934592;\n    var RO_THRESH = 4294967296;\n    var TYPE_SHARED = 'shared';\n\n    var handleRollover = function handleRollover(value, reference) {\n      var direction = 1;\n\n      if (value > reference) {\n        // If the current timestamp value is greater than our reference timestamp and we detect a\n        // timestamp rollover, this means the roll over is happening in the opposite direction.\n        // Example scenario: Enter a long stream/video just after a rollover occurred. The reference\n        // point will be set to a small number, e.g. 1. The user then seeks backwards over the\n        // rollover point. In loading this segment, the timestamp values will be very large,\n        // e.g. 2^33 - 1. Since this comes before the data we loaded previously, we want to adjust\n        // the time stamp to be `value - 2^33`.\n        direction = -1;\n      } // Note: A seek forwards or back that is greater than the RO_THRESH (2^32, ~13 hours) will\n      // cause an incorrect adjustment.\n\n\n      while (Math.abs(reference - value) > RO_THRESH) {\n        value += direction * MAX_TS;\n      }\n\n      return value;\n    };\n\n    var TimestampRolloverStream = function TimestampRolloverStream(type) {\n      var lastDTS, referenceDTS;\n      TimestampRolloverStream.prototype.init.call(this); // The \"shared\" type is used in cases where a stream will contain muxed\n      // video and audio. We could use `undefined` here, but having a string\n      // makes debugging a little clearer.\n\n      this.type_ = type || TYPE_SHARED;\n\n      this.push = function (data) {\n        // Any \"shared\" rollover streams will accept _all_ data. Otherwise,\n        // streams will only accept data that matches their type.\n        if (this.type_ !== TYPE_SHARED && data.type !== this.type_) {\n          return;\n        }\n\n        if (referenceDTS === undefined) {\n          referenceDTS = data.dts;\n        }\n\n        data.dts = handleRollover(data.dts, referenceDTS);\n        data.pts = handleRollover(data.pts, referenceDTS);\n        lastDTS = data.dts;\n        this.trigger('data', data);\n      };\n\n      this.flush = function () {\n        referenceDTS = lastDTS;\n        this.trigger('done');\n      };\n\n      this.endTimeline = function () {\n        this.flush();\n        this.trigger('endedtimeline');\n      };\n\n      this.discontinuity = function () {\n        referenceDTS = void 0;\n        lastDTS = void 0;\n      };\n\n      this.reset = function () {\n        this.discontinuity();\n        this.trigger('reset');\n      };\n    };\n\n    TimestampRolloverStream.prototype = new stream();\n    var timestampRolloverStream = {\n      TimestampRolloverStream: TimestampRolloverStream,\n      handleRollover: handleRollover\n    };\n\n    var percentEncode = function percentEncode(bytes, start, end) {\n      var i,\n          result = '';\n\n      for (i = start; i < end; i++) {\n        result += '%' + ('00' + bytes[i].toString(16)).slice(-2);\n      }\n\n      return result;\n    },\n        // return the string representation of the specified byte range,\n    // interpreted as UTf-8.\n    parseUtf8 = function parseUtf8(bytes, start, end) {\n      return decodeURIComponent(percentEncode(bytes, start, end));\n    },\n        // return the string representation of the specified byte range,\n    // interpreted as ISO-8859-1.\n    parseIso88591 = function parseIso88591(bytes, start, end) {\n      return unescape(percentEncode(bytes, start, end)); // jshint ignore:line\n    },\n        parseSyncSafeInteger = function parseSyncSafeInteger(data) {\n      return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];\n    },\n        tagParsers = {\n      TXXX: function TXXX(tag) {\n        var i;\n\n        if (tag.data[0] !== 3) {\n          // ignore frames with unrecognized character encodings\n          return;\n        }\n\n        for (i = 1; i < tag.data.length; i++) {\n          if (tag.data[i] === 0) {\n            // parse the text fields\n            tag.description = parseUtf8(tag.data, 1, i); // do not include the null terminator in the tag value\n\n            tag.value = parseUtf8(tag.data, i + 1, tag.data.length).replace(/\\0*$/, '');\n            break;\n          }\n        }\n\n        tag.data = tag.value;\n      },\n      WXXX: function WXXX(tag) {\n        var i;\n\n        if (tag.data[0] !== 3) {\n          // ignore frames with unrecognized character encodings\n          return;\n        }\n\n        for (i = 1; i < tag.data.length; i++) {\n          if (tag.data[i] === 0) {\n            // parse the description and URL fields\n            tag.description = parseUtf8(tag.data, 1, i);\n            tag.url = parseUtf8(tag.data, i + 1, tag.data.length);\n            break;\n          }\n        }\n      },\n      PRIV: function PRIV(tag) {\n        var i;\n\n        for (i = 0; i < tag.data.length; i++) {\n          if (tag.data[i] === 0) {\n            // parse the description and URL fields\n            tag.owner = parseIso88591(tag.data, 0, i);\n            break;\n          }\n        }\n\n        tag.privateData = tag.data.subarray(i + 1);\n        tag.data = tag.privateData;\n      }\n    },\n        _MetadataStream;\n\n    _MetadataStream = function MetadataStream(options) {\n      var settings = {\n        debug: !!(options && options.debug),\n        // the bytes of the program-level descriptor field in MP2T\n        // see ISO/IEC 13818-1:2013 (E), section 2.6 \"Program and\n        // program element descriptors\"\n        descriptor: options && options.descriptor\n      },\n          // the total size in bytes of the ID3 tag being parsed\n      tagSize = 0,\n          // tag data that is not complete enough to be parsed\n      buffer = [],\n          // the total number of bytes currently in the buffer\n      bufferSize = 0,\n          i;\n\n      _MetadataStream.prototype.init.call(this); // calculate the text track in-band metadata track dispatch type\n      // https://html.spec.whatwg.org/multipage/embedded-content.html#steps-to-expose-a-media-resource-specific-text-track\n\n\n      this.dispatchType = streamTypes.METADATA_STREAM_TYPE.toString(16);\n\n      if (settings.descriptor) {\n        for (i = 0; i < settings.descriptor.length; i++) {\n          this.dispatchType += ('00' + settings.descriptor[i].toString(16)).slice(-2);\n        }\n      }\n\n      this.push = function (chunk) {\n        var tag, frameStart, frameSize, frame, i, frameHeader;\n\n        if (chunk.type !== 'timed-metadata') {\n          return;\n        } // if data_alignment_indicator is set in the PES header,\n        // we must have the start of a new ID3 tag. Assume anything\n        // remaining in the buffer was malformed and throw it out\n\n\n        if (chunk.dataAlignmentIndicator) {\n          bufferSize = 0;\n          buffer.length = 0;\n        } // ignore events that don't look like ID3 data\n\n\n        if (buffer.length === 0 && (chunk.data.length < 10 || chunk.data[0] !== 'I'.charCodeAt(0) || chunk.data[1] !== 'D'.charCodeAt(0) || chunk.data[2] !== '3'.charCodeAt(0))) {\n          if (settings.debug) {\n            // eslint-disable-next-line no-console\n            console.log('Skipping unrecognized metadata packet');\n          }\n\n          return;\n        } // add this chunk to the data we've collected so far\n\n\n        buffer.push(chunk);\n        bufferSize += chunk.data.byteLength; // grab the size of the entire frame from the ID3 header\n\n        if (buffer.length === 1) {\n          // the frame size is transmitted as a 28-bit integer in the\n          // last four bytes of the ID3 header.\n          // The most significant bit of each byte is dropped and the\n          // results concatenated to recover the actual value.\n          tagSize = parseSyncSafeInteger(chunk.data.subarray(6, 10)); // ID3 reports the tag size excluding the header but it's more\n          // convenient for our comparisons to include it\n\n          tagSize += 10;\n        } // if the entire frame has not arrived, wait for more data\n\n\n        if (bufferSize < tagSize) {\n          return;\n        } // collect the entire frame so it can be parsed\n\n\n        tag = {\n          data: new Uint8Array(tagSize),\n          frames: [],\n          pts: buffer[0].pts,\n          dts: buffer[0].dts\n        };\n\n        for (i = 0; i < tagSize;) {\n          tag.data.set(buffer[0].data.subarray(0, tagSize - i), i);\n          i += buffer[0].data.byteLength;\n          bufferSize -= buffer[0].data.byteLength;\n          buffer.shift();\n        } // find the start of the first frame and the end of the tag\n\n\n        frameStart = 10;\n\n        if (tag.data[5] & 0x40) {\n          // advance the frame start past the extended header\n          frameStart += 4; // header size field\n\n          frameStart += parseSyncSafeInteger(tag.data.subarray(10, 14)); // clip any padding off the end\n\n          tagSize -= parseSyncSafeInteger(tag.data.subarray(16, 20));\n        } // parse one or more ID3 frames\n        // http://id3.org/id3v2.3.0#ID3v2_frame_overview\n\n\n        do {\n          // determine the number of bytes in this frame\n          frameSize = parseSyncSafeInteger(tag.data.subarray(frameStart + 4, frameStart + 8));\n\n          if (frameSize < 1) {\n            // eslint-disable-next-line no-console\n            return console.log('Malformed ID3 frame encountered. Skipping metadata parsing.');\n          }\n\n          frameHeader = String.fromCharCode(tag.data[frameStart], tag.data[frameStart + 1], tag.data[frameStart + 2], tag.data[frameStart + 3]);\n          frame = {\n            id: frameHeader,\n            data: tag.data.subarray(frameStart + 10, frameStart + frameSize + 10)\n          };\n          frame.key = frame.id;\n\n          if (tagParsers[frame.id]) {\n            tagParsers[frame.id](frame); // handle the special PRIV frame used to indicate the start\n            // time for raw AAC data\n\n            if (frame.owner === 'com.apple.streaming.transportStreamTimestamp') {\n              var d = frame.data,\n                  size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;\n              size *= 4;\n              size += d[7] & 0x03;\n              frame.timeStamp = size; // in raw AAC, all subsequent data will be timestamped based\n              // on the value of this frame\n              // we couldn't have known the appropriate pts and dts before\n              // parsing this ID3 tag so set those values now\n\n              if (tag.pts === undefined && tag.dts === undefined) {\n                tag.pts = frame.timeStamp;\n                tag.dts = frame.timeStamp;\n              }\n\n              this.trigger('timestamp', frame);\n            }\n          }\n\n          tag.frames.push(frame);\n          frameStart += 10; // advance past the frame header\n\n          frameStart += frameSize; // advance past the frame body\n        } while (frameStart < tagSize);\n\n        this.trigger('data', tag);\n      };\n    };\n\n    _MetadataStream.prototype = new stream();\n    var metadataStream = _MetadataStream;\n    var TimestampRolloverStream$1 = timestampRolloverStream.TimestampRolloverStream; // object types\n\n    var _TransportPacketStream, _TransportParseStream, _ElementaryStream; // constants\n\n\n    var MP2T_PACKET_LENGTH = 188,\n        // bytes\n    SYNC_BYTE = 0x47;\n    /**\n     * Splits an incoming stream of binary data into MPEG-2 Transport\n     * Stream packets.\n     */\n\n    _TransportPacketStream = function TransportPacketStream() {\n      var buffer = new Uint8Array(MP2T_PACKET_LENGTH),\n          bytesInBuffer = 0;\n\n      _TransportPacketStream.prototype.init.call(this); // Deliver new bytes to the stream.\n\n      /**\n       * Split a stream of data into M2TS packets\n      **/\n\n\n      this.push = function (bytes) {\n        var startIndex = 0,\n            endIndex = MP2T_PACKET_LENGTH,\n            everything; // If there are bytes remaining from the last segment, prepend them to the\n        // bytes that were pushed in\n\n        if (bytesInBuffer) {\n          everything = new Uint8Array(bytes.byteLength + bytesInBuffer);\n          everything.set(buffer.subarray(0, bytesInBuffer));\n          everything.set(bytes, bytesInBuffer);\n          bytesInBuffer = 0;\n        } else {\n          everything = bytes;\n        } // While we have enough data for a packet\n\n\n        while (endIndex < everything.byteLength) {\n          // Look for a pair of start and end sync bytes in the data..\n          if (everything[startIndex] === SYNC_BYTE && everything[endIndex] === SYNC_BYTE) {\n            // We found a packet so emit it and jump one whole packet forward in\n            // the stream\n            this.trigger('data', everything.subarray(startIndex, endIndex));\n            startIndex += MP2T_PACKET_LENGTH;\n            endIndex += MP2T_PACKET_LENGTH;\n            continue;\n          } // If we get here, we have somehow become de-synchronized and we need to step\n          // forward one byte at a time until we find a pair of sync bytes that denote\n          // a packet\n\n\n          startIndex++;\n          endIndex++;\n        } // If there was some data left over at the end of the segment that couldn't\n        // possibly be a whole packet, keep it because it might be the start of a packet\n        // that continues in the next segment\n\n\n        if (startIndex < everything.byteLength) {\n          buffer.set(everything.subarray(startIndex), 0);\n          bytesInBuffer = everything.byteLength - startIndex;\n        }\n      };\n      /**\n       * Passes identified M2TS packets to the TransportParseStream to be parsed\n      **/\n\n\n      this.flush = function () {\n        // If the buffer contains a whole packet when we are being flushed, emit it\n        // and empty the buffer. Otherwise hold onto the data because it may be\n        // important for decoding the next segment\n        if (bytesInBuffer === MP2T_PACKET_LENGTH && buffer[0] === SYNC_BYTE) {\n          this.trigger('data', buffer);\n          bytesInBuffer = 0;\n        }\n\n        this.trigger('done');\n      };\n\n      this.endTimeline = function () {\n        this.flush();\n        this.trigger('endedtimeline');\n      };\n\n      this.reset = function () {\n        bytesInBuffer = 0;\n        this.trigger('reset');\n      };\n    };\n\n    _TransportPacketStream.prototype = new stream();\n    /**\n     * Accepts an MP2T TransportPacketStream and emits data events with parsed\n     * forms of the individual transport stream packets.\n     */\n\n    _TransportParseStream = function TransportParseStream() {\n      var parsePsi, parsePat, parsePmt, self;\n\n      _TransportParseStream.prototype.init.call(this);\n\n      self = this;\n      this.packetsWaitingForPmt = [];\n      this.programMapTable = undefined;\n\n      parsePsi = function parsePsi(payload, psi) {\n        var offset = 0; // PSI packets may be split into multiple sections and those\n        // sections may be split into multiple packets. If a PSI\n        // section starts in this packet, the payload_unit_start_indicator\n        // will be true and the first byte of the payload will indicate\n        // the offset from the current position to the start of the\n        // section.\n\n        if (psi.payloadUnitStartIndicator) {\n          offset += payload[offset] + 1;\n        }\n\n        if (psi.type === 'pat') {\n          parsePat(payload.subarray(offset), psi);\n        } else {\n          parsePmt(payload.subarray(offset), psi);\n        }\n      };\n\n      parsePat = function parsePat(payload, pat) {\n        pat.section_number = payload[7]; // eslint-disable-line camelcase\n\n        pat.last_section_number = payload[8]; // eslint-disable-line camelcase\n        // skip the PSI header and parse the first PMT entry\n\n        self.pmtPid = (payload[10] & 0x1F) << 8 | payload[11];\n        pat.pmtPid = self.pmtPid;\n      };\n      /**\n       * Parse out the relevant fields of a Program Map Table (PMT).\n       * @param payload {Uint8Array} the PMT-specific portion of an MP2T\n       * packet. The first byte in this array should be the table_id\n       * field.\n       * @param pmt {object} the object that should be decorated with\n       * fields parsed from the PMT.\n       */\n\n\n      parsePmt = function parsePmt(payload, pmt) {\n        var sectionLength, tableEnd, programInfoLength, offset; // PMTs can be sent ahead of the time when they should actually\n        // take effect. We don't believe this should ever be the case\n        // for HLS but we'll ignore \"forward\" PMT declarations if we see\n        // them. Future PMT declarations have the current_next_indicator\n        // set to zero.\n\n        if (!(payload[5] & 0x01)) {\n          return;\n        } // overwrite any existing program map table\n\n\n        self.programMapTable = {\n          video: null,\n          audio: null,\n          'timed-metadata': {}\n        }; // the mapping table ends at the end of the current section\n\n        sectionLength = (payload[1] & 0x0f) << 8 | payload[2];\n        tableEnd = 3 + sectionLength - 4; // to determine where the table is, we have to figure out how\n        // long the program info descriptors are\n\n        programInfoLength = (payload[10] & 0x0f) << 8 | payload[11]; // advance the offset to the first entry in the mapping table\n\n        offset = 12 + programInfoLength;\n\n        while (offset < tableEnd) {\n          var streamType = payload[offset];\n          var pid = (payload[offset + 1] & 0x1F) << 8 | payload[offset + 2]; // only map a single elementary_pid for audio and video stream types\n          // TODO: should this be done for metadata too? for now maintain behavior of\n          //       multiple metadata streams\n\n          if (streamType === streamTypes.H264_STREAM_TYPE && self.programMapTable.video === null) {\n            self.programMapTable.video = pid;\n          } else if (streamType === streamTypes.ADTS_STREAM_TYPE && self.programMapTable.audio === null) {\n            self.programMapTable.audio = pid;\n          } else if (streamType === streamTypes.METADATA_STREAM_TYPE) {\n            // map pid to stream type for metadata streams\n            self.programMapTable['timed-metadata'][pid] = streamType;\n          } // move to the next table entry\n          // skip past the elementary stream descriptors, if present\n\n\n          offset += ((payload[offset + 3] & 0x0F) << 8 | payload[offset + 4]) + 5;\n        } // record the map on the packet as well\n\n\n        pmt.programMapTable = self.programMapTable;\n      };\n      /**\n       * Deliver a new MP2T packet to the next stream in the pipeline.\n       */\n\n\n      this.push = function (packet) {\n        var result = {},\n            offset = 4;\n        result.payloadUnitStartIndicator = !!(packet[1] & 0x40); // pid is a 13-bit field starting at the last bit of packet[1]\n\n        result.pid = packet[1] & 0x1f;\n        result.pid <<= 8;\n        result.pid |= packet[2]; // if an adaption field is present, its length is specified by the\n        // fifth byte of the TS packet header. The adaptation field is\n        // used to add stuffing to PES packets that don't fill a complete\n        // TS packet, and to specify some forms of timing and control data\n        // that we do not currently use.\n\n        if ((packet[3] & 0x30) >>> 4 > 0x01) {\n          offset += packet[offset] + 1;\n        } // parse the rest of the packet based on the type\n\n\n        if (result.pid === 0) {\n          result.type = 'pat';\n          parsePsi(packet.subarray(offset), result);\n          this.trigger('data', result);\n        } else if (result.pid === this.pmtPid) {\n          result.type = 'pmt';\n          parsePsi(packet.subarray(offset), result);\n          this.trigger('data', result); // if there are any packets waiting for a PMT to be found, process them now\n\n          while (this.packetsWaitingForPmt.length) {\n            this.processPes_.apply(this, this.packetsWaitingForPmt.shift());\n          }\n        } else if (this.programMapTable === undefined) {\n          // When we have not seen a PMT yet, defer further processing of\n          // PES packets until one has been parsed\n          this.packetsWaitingForPmt.push([packet, offset, result]);\n        } else {\n          this.processPes_(packet, offset, result);\n        }\n      };\n\n      this.processPes_ = function (packet, offset, result) {\n        // set the appropriate stream type\n        if (result.pid === this.programMapTable.video) {\n          result.streamType = streamTypes.H264_STREAM_TYPE;\n        } else if (result.pid === this.programMapTable.audio) {\n          result.streamType = streamTypes.ADTS_STREAM_TYPE;\n        } else {\n          // if not video or audio, it is timed-metadata or unknown\n          // if unknown, streamType will be undefined\n          result.streamType = this.programMapTable['timed-metadata'][result.pid];\n        }\n\n        result.type = 'pes';\n        result.data = packet.subarray(offset);\n        this.trigger('data', result);\n      };\n    };\n\n    _TransportParseStream.prototype = new stream();\n    _TransportParseStream.STREAM_TYPES = {\n      h264: 0x1b,\n      adts: 0x0f\n    };\n    /**\n     * Reconsistutes program elementary stream (PES) packets from parsed\n     * transport stream packets. That is, if you pipe an\n     * mp2t.TransportParseStream into a mp2t.ElementaryStream, the output\n     * events will be events which capture the bytes for individual PES\n     * packets plus relevant metadata that has been extracted from the\n     * container.\n     */\n\n    _ElementaryStream = function ElementaryStream() {\n      var self = this,\n          // PES packet fragments\n      video = {\n        data: [],\n        size: 0\n      },\n          audio = {\n        data: [],\n        size: 0\n      },\n          timedMetadata = {\n        data: [],\n        size: 0\n      },\n          programMapTable,\n          parsePes = function parsePes(payload, pes) {\n        var ptsDtsFlags; // get the packet length, this will be 0 for video\n\n        pes.packetLength = 6 + (payload[4] << 8 | payload[5]); // find out if this packets starts a new keyframe\n\n        pes.dataAlignmentIndicator = (payload[6] & 0x04) !== 0; // PES packets may be annotated with a PTS value, or a PTS value\n        // and a DTS value. Determine what combination of values is\n        // available to work with.\n\n        ptsDtsFlags = payload[7]; // PTS and DTS are normally stored as a 33-bit number.  Javascript\n        // performs all bitwise operations on 32-bit integers but javascript\n        // supports a much greater range (52-bits) of integer using standard\n        // mathematical operations.\n        // We construct a 31-bit value using bitwise operators over the 31\n        // most significant bits and then multiply by 4 (equal to a left-shift\n        // of 2) before we add the final 2 least significant bits of the\n        // timestamp (equal to an OR.)\n\n        if (ptsDtsFlags & 0xC0) {\n          // the PTS and DTS are not written out directly. For information\n          // on how they are encoded, see\n          // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html\n          pes.pts = (payload[9] & 0x0E) << 27 | (payload[10] & 0xFF) << 20 | (payload[11] & 0xFE) << 12 | (payload[12] & 0xFF) << 5 | (payload[13] & 0xFE) >>> 3;\n          pes.pts *= 4; // Left shift by 2\n\n          pes.pts += (payload[13] & 0x06) >>> 1; // OR by the two LSBs\n\n          pes.dts = pes.pts;\n\n          if (ptsDtsFlags & 0x40) {\n            pes.dts = (payload[14] & 0x0E) << 27 | (payload[15] & 0xFF) << 20 | (payload[16] & 0xFE) << 12 | (payload[17] & 0xFF) << 5 | (payload[18] & 0xFE) >>> 3;\n            pes.dts *= 4; // Left shift by 2\n\n            pes.dts += (payload[18] & 0x06) >>> 1; // OR by the two LSBs\n          }\n        } // the data section starts immediately after the PES header.\n        // pes_header_data_length specifies the number of header bytes\n        // that follow the last byte of the field.\n\n\n        pes.data = payload.subarray(9 + payload[8]);\n      },\n\n      /**\n        * Pass completely parsed PES packets to the next stream in the pipeline\n       **/\n      flushStream = function flushStream(stream$$1, type, forceFlush) {\n        var packetData = new Uint8Array(stream$$1.size),\n            event = {\n          type: type\n        },\n            i = 0,\n            offset = 0,\n            packetFlushable = false,\n            fragment; // do nothing if there is not enough buffered data for a complete\n        // PES header\n\n        if (!stream$$1.data.length || stream$$1.size < 9) {\n          return;\n        }\n\n        event.trackId = stream$$1.data[0].pid; // reassemble the packet\n\n        for (i = 0; i < stream$$1.data.length; i++) {\n          fragment = stream$$1.data[i];\n          packetData.set(fragment.data, offset);\n          offset += fragment.data.byteLength;\n        } // parse assembled packet's PES header\n\n\n        parsePes(packetData, event); // non-video PES packets MUST have a non-zero PES_packet_length\n        // check that there is enough stream data to fill the packet\n\n        packetFlushable = type === 'video' || event.packetLength <= stream$$1.size; // flush pending packets if the conditions are right\n\n        if (forceFlush || packetFlushable) {\n          stream$$1.size = 0;\n          stream$$1.data.length = 0;\n        } // only emit packets that are complete. this is to avoid assembling\n        // incomplete PES packets due to poor segmentation\n\n\n        if (packetFlushable) {\n          self.trigger('data', event);\n        }\n      };\n\n      _ElementaryStream.prototype.init.call(this);\n      /**\n       * Identifies M2TS packet types and parses PES packets using metadata\n       * parsed from the PMT\n       **/\n\n\n      this.push = function (data) {\n        ({\n          pat: function pat() {// we have to wait for the PMT to arrive as well before we\n            // have any meaningful metadata\n          },\n          pes: function pes() {\n            var stream$$1, streamType;\n\n            switch (data.streamType) {\n              case streamTypes.H264_STREAM_TYPE:\n              case streamTypes.H264_STREAM_TYPE:\n                stream$$1 = video;\n                streamType = 'video';\n                break;\n\n              case streamTypes.ADTS_STREAM_TYPE:\n                stream$$1 = audio;\n                streamType = 'audio';\n                break;\n\n              case streamTypes.METADATA_STREAM_TYPE:\n                stream$$1 = timedMetadata;\n                streamType = 'timed-metadata';\n                break;\n\n              default:\n                // ignore unknown stream types\n                return;\n            } // if a new packet is starting, we can flush the completed\n            // packet\n\n\n            if (data.payloadUnitStartIndicator) {\n              flushStream(stream$$1, streamType, true);\n            } // buffer this fragment until we are sure we've received the\n            // complete payload\n\n\n            stream$$1.data.push(data);\n            stream$$1.size += data.data.byteLength;\n          },\n          pmt: function pmt() {\n            var event = {\n              type: 'metadata',\n              tracks: []\n            };\n            programMapTable = data.programMapTable; // translate audio and video streams to tracks\n\n            if (programMapTable.video !== null) {\n              event.tracks.push({\n                timelineStartInfo: {\n                  baseMediaDecodeTime: 0\n                },\n                id: +programMapTable.video,\n                codec: 'avc',\n                type: 'video'\n              });\n            }\n\n            if (programMapTable.audio !== null) {\n              event.tracks.push({\n                timelineStartInfo: {\n                  baseMediaDecodeTime: 0\n                },\n                id: +programMapTable.audio,\n                codec: 'adts',\n                type: 'audio'\n              });\n            }\n\n            self.trigger('data', event);\n          }\n        })[data.type]();\n      };\n\n      this.reset = function () {\n        video.size = 0;\n        video.data.length = 0;\n        audio.size = 0;\n        audio.data.length = 0;\n        this.trigger('reset');\n      };\n      /**\n       * Flush any remaining input. Video PES packets may be of variable\n       * length. Normally, the start of a new video packet can trigger the\n       * finalization of the previous packet. That is not possible if no\n       * more video is forthcoming, however. In that case, some other\n       * mechanism (like the end of the file) has to be employed. When it is\n       * clear that no additional data is forthcoming, calling this method\n       * will flush the buffered packets.\n       */\n\n\n      this.flushStreams_ = function () {\n        // !!THIS ORDER IS IMPORTANT!!\n        // video first then audio\n        flushStream(video, 'video');\n        flushStream(audio, 'audio');\n        flushStream(timedMetadata, 'timed-metadata');\n      };\n\n      this.flush = function () {\n        this.flushStreams_();\n        this.trigger('done');\n      };\n    };\n\n    _ElementaryStream.prototype = new stream();\n    var m2ts = {\n      PAT_PID: 0x0000,\n      MP2T_PACKET_LENGTH: MP2T_PACKET_LENGTH,\n      TransportPacketStream: _TransportPacketStream,\n      TransportParseStream: _TransportParseStream,\n      ElementaryStream: _ElementaryStream,\n      TimestampRolloverStream: TimestampRolloverStream$1,\n      CaptionStream: captionStream.CaptionStream,\n      Cea608Stream: captionStream.Cea608Stream,\n      MetadataStream: metadataStream\n    };\n\n    for (var type in streamTypes) {\n      if (streamTypes.hasOwnProperty(type)) {\n        m2ts[type] = streamTypes[type];\n      }\n    }\n\n    var m2ts_1 = m2ts;\n    var ONE_SECOND_IN_TS$2 = clock.ONE_SECOND_IN_TS;\n\n    var _AdtsStream;\n\n    var ADTS_SAMPLING_FREQUENCIES = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];\n    /*\n     * Accepts a ElementaryStream and emits data events with parsed\n     * AAC Audio Frames of the individual packets. Input audio in ADTS\n     * format is unpacked and re-emitted as AAC frames.\n     *\n     * @see http://wiki.multimedia.cx/index.php?title=ADTS\n     * @see http://wiki.multimedia.cx/?title=Understanding_AAC\n     */\n\n    _AdtsStream = function AdtsStream(handlePartialSegments) {\n      var buffer,\n          frameNum = 0;\n\n      _AdtsStream.prototype.init.call(this);\n\n      this.push = function (packet) {\n        var i = 0,\n            frameLength,\n            protectionSkipBytes,\n            frameEnd,\n            oldBuffer,\n            sampleCount,\n            adtsFrameDuration;\n\n        if (!handlePartialSegments) {\n          frameNum = 0;\n        }\n\n        if (packet.type !== 'audio') {\n          // ignore non-audio data\n          return;\n        } // Prepend any data in the buffer to the input data so that we can parse\n        // aac frames the cross a PES packet boundary\n\n\n        if (buffer) {\n          oldBuffer = buffer;\n          buffer = new Uint8Array(oldBuffer.byteLength + packet.data.byteLength);\n          buffer.set(oldBuffer);\n          buffer.set(packet.data, oldBuffer.byteLength);\n        } else {\n          buffer = packet.data;\n        } // unpack any ADTS frames which have been fully received\n        // for details on the ADTS header, see http://wiki.multimedia.cx/index.php?title=ADTS\n\n\n        while (i + 5 < buffer.length) {\n          // Look for the start of an ADTS header..\n          if (buffer[i] !== 0xFF || (buffer[i + 1] & 0xF6) !== 0xF0) {\n            // If a valid header was not found,  jump one forward and attempt to\n            // find a valid ADTS header starting at the next byte\n            i++;\n            continue;\n          } // The protection skip bit tells us if we have 2 bytes of CRC data at the\n          // end of the ADTS header\n\n\n          protectionSkipBytes = (~buffer[i + 1] & 0x01) * 2; // Frame length is a 13 bit integer starting 16 bits from the\n          // end of the sync sequence\n\n          frameLength = (buffer[i + 3] & 0x03) << 11 | buffer[i + 4] << 3 | (buffer[i + 5] & 0xe0) >> 5;\n          sampleCount = ((buffer[i + 6] & 0x03) + 1) * 1024;\n          adtsFrameDuration = sampleCount * ONE_SECOND_IN_TS$2 / ADTS_SAMPLING_FREQUENCIES[(buffer[i + 2] & 0x3c) >>> 2];\n          frameEnd = i + frameLength; // If we don't have enough data to actually finish this ADTS frame, return\n          // and wait for more data\n\n          if (buffer.byteLength < frameEnd) {\n            return;\n          } // Otherwise, deliver the complete AAC frame\n\n\n          this.trigger('data', {\n            pts: packet.pts + frameNum * adtsFrameDuration,\n            dts: packet.dts + frameNum * adtsFrameDuration,\n            sampleCount: sampleCount,\n            audioobjecttype: (buffer[i + 2] >>> 6 & 0x03) + 1,\n            channelcount: (buffer[i + 2] & 1) << 2 | (buffer[i + 3] & 0xc0) >>> 6,\n            samplerate: ADTS_SAMPLING_FREQUENCIES[(buffer[i + 2] & 0x3c) >>> 2],\n            samplingfrequencyindex: (buffer[i + 2] & 0x3c) >>> 2,\n            // assume ISO/IEC 14496-12 AudioSampleEntry default of 16\n            samplesize: 16,\n            data: buffer.subarray(i + 7 + protectionSkipBytes, frameEnd)\n          });\n          frameNum++; // If the buffer is empty, clear it and return\n\n          if (buffer.byteLength === frameEnd) {\n            buffer = undefined;\n            return;\n          } // Remove the finished frame from the buffer and start the process again\n\n\n          buffer = buffer.subarray(frameEnd);\n        }\n      };\n\n      this.flush = function () {\n        frameNum = 0;\n        this.trigger('done');\n      };\n\n      this.reset = function () {\n        buffer = void 0;\n        this.trigger('reset');\n      };\n\n      this.endTimeline = function () {\n        buffer = void 0;\n        this.trigger('endedtimeline');\n      };\n    };\n\n    _AdtsStream.prototype = new stream();\n    var adts = _AdtsStream;\n    /**\n     * mux.js\n     *\n     * Copyright (c) Brightcove\n     * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n     */\n\n    var ExpGolomb;\n    /**\n     * Parser for exponential Golomb codes, a variable-bitwidth number encoding\n     * scheme used by h264.\n     */\n\n    ExpGolomb = function ExpGolomb(workingData) {\n      var // the number of bytes left to examine in workingData\n      workingBytesAvailable = workingData.byteLength,\n          // the current word being examined\n      workingWord = 0,\n          // :uint\n      // the number of bits left to examine in the current word\n      workingBitsAvailable = 0; // :uint;\n      // ():uint\n\n      this.length = function () {\n        return 8 * workingBytesAvailable;\n      }; // ():uint\n\n\n      this.bitsAvailable = function () {\n        return 8 * workingBytesAvailable + workingBitsAvailable;\n      }; // ():void\n\n\n      this.loadWord = function () {\n        var position = workingData.byteLength - workingBytesAvailable,\n            workingBytes = new Uint8Array(4),\n            availableBytes = Math.min(4, workingBytesAvailable);\n\n        if (availableBytes === 0) {\n          throw new Error('no bytes available');\n        }\n\n        workingBytes.set(workingData.subarray(position, position + availableBytes));\n        workingWord = new DataView(workingBytes.buffer).getUint32(0); // track the amount of workingData that has been processed\n\n        workingBitsAvailable = availableBytes * 8;\n        workingBytesAvailable -= availableBytes;\n      }; // (count:int):void\n\n\n      this.skipBits = function (count) {\n        var skipBytes; // :int\n\n        if (workingBitsAvailable > count) {\n          workingWord <<= count;\n          workingBitsAvailable -= count;\n        } else {\n          count -= workingBitsAvailable;\n          skipBytes = Math.floor(count / 8);\n          count -= skipBytes * 8;\n          workingBytesAvailable -= skipBytes;\n          this.loadWord();\n          workingWord <<= count;\n          workingBitsAvailable -= count;\n        }\n      }; // (size:int):uint\n\n\n      this.readBits = function (size) {\n        var bits = Math.min(workingBitsAvailable, size),\n            // :uint\n        valu = workingWord >>> 32 - bits; // :uint\n        // if size > 31, handle error\n\n        workingBitsAvailable -= bits;\n\n        if (workingBitsAvailable > 0) {\n          workingWord <<= bits;\n        } else if (workingBytesAvailable > 0) {\n          this.loadWord();\n        }\n\n        bits = size - bits;\n\n        if (bits > 0) {\n          return valu << bits | this.readBits(bits);\n        }\n\n        return valu;\n      }; // ():uint\n\n\n      this.skipLeadingZeros = function () {\n        var leadingZeroCount; // :uint\n\n        for (leadingZeroCount = 0; leadingZeroCount < workingBitsAvailable; ++leadingZeroCount) {\n          if ((workingWord & 0x80000000 >>> leadingZeroCount) !== 0) {\n            // the first bit of working word is 1\n            workingWord <<= leadingZeroCount;\n            workingBitsAvailable -= leadingZeroCount;\n            return leadingZeroCount;\n          }\n        } // we exhausted workingWord and still have not found a 1\n\n\n        this.loadWord();\n        return leadingZeroCount + this.skipLeadingZeros();\n      }; // ():void\n\n\n      this.skipUnsignedExpGolomb = function () {\n        this.skipBits(1 + this.skipLeadingZeros());\n      }; // ():void\n\n\n      this.skipExpGolomb = function () {\n        this.skipBits(1 + this.skipLeadingZeros());\n      }; // ():uint\n\n\n      this.readUnsignedExpGolomb = function () {\n        var clz = this.skipLeadingZeros(); // :uint\n\n        return this.readBits(clz + 1) - 1;\n      }; // ():int\n\n\n      this.readExpGolomb = function () {\n        var valu = this.readUnsignedExpGolomb(); // :int\n\n        if (0x01 & valu) {\n          // the number is odd if the low order bit is set\n          return 1 + valu >>> 1; // add 1 to make it even, and divide by 2\n        }\n\n        return -1 * (valu >>> 1); // divide by two then make it negative\n      }; // Some convenience functions\n      // :Boolean\n\n\n      this.readBoolean = function () {\n        return this.readBits(1) === 1;\n      }; // ():int\n\n\n      this.readUnsignedByte = function () {\n        return this.readBits(8);\n      };\n\n      this.loadWord();\n    };\n\n    var expGolomb = ExpGolomb;\n\n    var _H264Stream, _NalByteStream;\n\n    var PROFILES_WITH_OPTIONAL_SPS_DATA;\n    /**\n     * Accepts a NAL unit byte stream and unpacks the embedded NAL units.\n     */\n\n    _NalByteStream = function NalByteStream() {\n      var syncPoint = 0,\n          i,\n          buffer;\n\n      _NalByteStream.prototype.init.call(this);\n      /*\n       * Scans a byte stream and triggers a data event with the NAL units found.\n       * @param {Object} data Event received from H264Stream\n       * @param {Uint8Array} data.data The h264 byte stream to be scanned\n       *\n       * @see H264Stream.push\n       */\n\n\n      this.push = function (data) {\n        var swapBuffer;\n\n        if (!buffer) {\n          buffer = data.data;\n        } else {\n          swapBuffer = new Uint8Array(buffer.byteLength + data.data.byteLength);\n          swapBuffer.set(buffer);\n          swapBuffer.set(data.data, buffer.byteLength);\n          buffer = swapBuffer;\n        }\n\n        var len = buffer.byteLength; // Rec. ITU-T H.264, Annex B\n        // scan for NAL unit boundaries\n        // a match looks like this:\n        // 0 0 1 .. NAL .. 0 0 1\n        // ^ sync point        ^ i\n        // or this:\n        // 0 0 1 .. NAL .. 0 0 0\n        // ^ sync point        ^ i\n        // advance the sync point to a NAL start, if necessary\n\n        for (; syncPoint < len - 3; syncPoint++) {\n          if (buffer[syncPoint + 2] === 1) {\n            // the sync point is properly aligned\n            i = syncPoint + 5;\n            break;\n          }\n        }\n\n        while (i < len) {\n          // look at the current byte to determine if we've hit the end of\n          // a NAL unit boundary\n          switch (buffer[i]) {\n            case 0:\n              // skip past non-sync sequences\n              if (buffer[i - 1] !== 0) {\n                i += 2;\n                break;\n              } else if (buffer[i - 2] !== 0) {\n                i++;\n                break;\n              } // deliver the NAL unit if it isn't empty\n\n\n              if (syncPoint + 3 !== i - 2) {\n                this.trigger('data', buffer.subarray(syncPoint + 3, i - 2));\n              } // drop trailing zeroes\n\n\n              do {\n                i++;\n              } while (buffer[i] !== 1 && i < len);\n\n              syncPoint = i - 2;\n              i += 3;\n              break;\n\n            case 1:\n              // skip past non-sync sequences\n              if (buffer[i - 1] !== 0 || buffer[i - 2] !== 0) {\n                i += 3;\n                break;\n              } // deliver the NAL unit\n\n\n              this.trigger('data', buffer.subarray(syncPoint + 3, i - 2));\n              syncPoint = i - 2;\n              i += 3;\n              break;\n\n            default:\n              // the current byte isn't a one or zero, so it cannot be part\n              // of a sync sequence\n              i += 3;\n              break;\n          }\n        } // filter out the NAL units that were delivered\n\n\n        buffer = buffer.subarray(syncPoint);\n        i -= syncPoint;\n        syncPoint = 0;\n      };\n\n      this.reset = function () {\n        buffer = null;\n        syncPoint = 0;\n        this.trigger('reset');\n      };\n\n      this.flush = function () {\n        // deliver the last buffered NAL unit\n        if (buffer && buffer.byteLength > 3) {\n          this.trigger('data', buffer.subarray(syncPoint + 3));\n        } // reset the stream state\n\n\n        buffer = null;\n        syncPoint = 0;\n        this.trigger('done');\n      };\n\n      this.endTimeline = function () {\n        this.flush();\n        this.trigger('endedtimeline');\n      };\n    };\n\n    _NalByteStream.prototype = new stream(); // values of profile_idc that indicate additional fields are included in the SPS\n    // see Recommendation ITU-T H.264 (4/2013),\n    // 7.3.2.1.1 Sequence parameter set data syntax\n\n    PROFILES_WITH_OPTIONAL_SPS_DATA = {\n      100: true,\n      110: true,\n      122: true,\n      244: true,\n      44: true,\n      83: true,\n      86: true,\n      118: true,\n      128: true,\n      138: true,\n      139: true,\n      134: true\n    };\n    /**\n     * Accepts input from a ElementaryStream and produces H.264 NAL unit data\n     * events.\n     */\n\n    _H264Stream = function H264Stream() {\n      var nalByteStream = new _NalByteStream(),\n          self,\n          trackId,\n          currentPts,\n          currentDts,\n          discardEmulationPreventionBytes,\n          readSequenceParameterSet,\n          skipScalingList;\n\n      _H264Stream.prototype.init.call(this);\n\n      self = this;\n      /*\n       * Pushes a packet from a stream onto the NalByteStream\n       *\n       * @param {Object} packet - A packet received from a stream\n       * @param {Uint8Array} packet.data - The raw bytes of the packet\n       * @param {Number} packet.dts - Decode timestamp of the packet\n       * @param {Number} packet.pts - Presentation timestamp of the packet\n       * @param {Number} packet.trackId - The id of the h264 track this packet came from\n       * @param {('video'|'audio')} packet.type - The type of packet\n       *\n       */\n\n      this.push = function (packet) {\n        if (packet.type !== 'video') {\n          return;\n        }\n\n        trackId = packet.trackId;\n        currentPts = packet.pts;\n        currentDts = packet.dts;\n        nalByteStream.push(packet);\n      };\n      /*\n       * Identify NAL unit types and pass on the NALU, trackId, presentation and decode timestamps\n       * for the NALUs to the next stream component.\n       * Also, preprocess caption and sequence parameter NALUs.\n       *\n       * @param {Uint8Array} data - A NAL unit identified by `NalByteStream.push`\n       * @see NalByteStream.push\n       */\n\n\n      nalByteStream.on('data', function (data) {\n        var event = {\n          trackId: trackId,\n          pts: currentPts,\n          dts: currentDts,\n          data: data\n        };\n\n        switch (data[0] & 0x1f) {\n          case 0x05:\n            event.nalUnitType = 'slice_layer_without_partitioning_rbsp_idr';\n            break;\n\n          case 0x06:\n            event.nalUnitType = 'sei_rbsp';\n            event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1));\n            break;\n\n          case 0x07:\n            event.nalUnitType = 'seq_parameter_set_rbsp';\n            event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1));\n            event.config = readSequenceParameterSet(event.escapedRBSP);\n            break;\n\n          case 0x08:\n            event.nalUnitType = 'pic_parameter_set_rbsp';\n            break;\n\n          case 0x09:\n            event.nalUnitType = 'access_unit_delimiter_rbsp';\n            break;\n\n          default:\n            break;\n        } // This triggers data on the H264Stream\n\n\n        self.trigger('data', event);\n      });\n      nalByteStream.on('done', function () {\n        self.trigger('done');\n      });\n      nalByteStream.on('partialdone', function () {\n        self.trigger('partialdone');\n      });\n      nalByteStream.on('reset', function () {\n        self.trigger('reset');\n      });\n      nalByteStream.on('endedtimeline', function () {\n        self.trigger('endedtimeline');\n      });\n\n      this.flush = function () {\n        nalByteStream.flush();\n      };\n\n      this.partialFlush = function () {\n        nalByteStream.partialFlush();\n      };\n\n      this.reset = function () {\n        nalByteStream.reset();\n      };\n\n      this.endTimeline = function () {\n        nalByteStream.endTimeline();\n      };\n      /**\n       * Advance the ExpGolomb decoder past a scaling list. The scaling\n       * list is optionally transmitted as part of a sequence parameter\n       * set and is not relevant to transmuxing.\n       * @param count {number} the number of entries in this scaling list\n       * @param expGolombDecoder {object} an ExpGolomb pointed to the\n       * start of a scaling list\n       * @see Recommendation ITU-T H.264, Section 7.3.2.1.1.1\n       */\n\n\n      skipScalingList = function skipScalingList(count, expGolombDecoder) {\n        var lastScale = 8,\n            nextScale = 8,\n            j,\n            deltaScale;\n\n        for (j = 0; j < count; j++) {\n          if (nextScale !== 0) {\n            deltaScale = expGolombDecoder.readExpGolomb();\n            nextScale = (lastScale + deltaScale + 256) % 256;\n          }\n\n          lastScale = nextScale === 0 ? lastScale : nextScale;\n        }\n      };\n      /**\n       * Expunge any \"Emulation Prevention\" bytes from a \"Raw Byte\n       * Sequence Payload\"\n       * @param data {Uint8Array} the bytes of a RBSP from a NAL\n       * unit\n       * @return {Uint8Array} the RBSP without any Emulation\n       * Prevention Bytes\n       */\n\n\n      discardEmulationPreventionBytes = function discardEmulationPreventionBytes(data) {\n        var length = data.byteLength,\n            emulationPreventionBytesPositions = [],\n            i = 1,\n            newLength,\n            newData; // Find all `Emulation Prevention Bytes`\n\n        while (i < length - 2) {\n          if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {\n            emulationPreventionBytesPositions.push(i + 2);\n            i += 2;\n          } else {\n            i++;\n          }\n        } // If no Emulation Prevention Bytes were found just return the original\n        // array\n\n\n        if (emulationPreventionBytesPositions.length === 0) {\n          return data;\n        } // Create a new array to hold the NAL unit data\n\n\n        newLength = length - emulationPreventionBytesPositions.length;\n        newData = new Uint8Array(newLength);\n        var sourceIndex = 0;\n\n        for (i = 0; i < newLength; sourceIndex++, i++) {\n          if (sourceIndex === emulationPreventionBytesPositions[0]) {\n            // Skip this byte\n            sourceIndex++; // Remove this position index\n\n            emulationPreventionBytesPositions.shift();\n          }\n\n          newData[i] = data[sourceIndex];\n        }\n\n        return newData;\n      };\n      /**\n       * Read a sequence parameter set and return some interesting video\n       * properties. A sequence parameter set is the H264 metadata that\n       * describes the properties of upcoming video frames.\n       * @param data {Uint8Array} the bytes of a sequence parameter set\n       * @return {object} an object with configuration parsed from the\n       * sequence parameter set, including the dimensions of the\n       * associated video frames.\n       */\n\n\n      readSequenceParameterSet = function readSequenceParameterSet(data) {\n        var frameCropLeftOffset = 0,\n            frameCropRightOffset = 0,\n            frameCropTopOffset = 0,\n            frameCropBottomOffset = 0,\n            sarScale = 1,\n            expGolombDecoder,\n            profileIdc,\n            levelIdc,\n            profileCompatibility,\n            chromaFormatIdc,\n            picOrderCntType,\n            numRefFramesInPicOrderCntCycle,\n            picWidthInMbsMinus1,\n            picHeightInMapUnitsMinus1,\n            frameMbsOnlyFlag,\n            scalingListCount,\n            sarRatio,\n            aspectRatioIdc,\n            i;\n        expGolombDecoder = new expGolomb(data);\n        profileIdc = expGolombDecoder.readUnsignedByte(); // profile_idc\n\n        profileCompatibility = expGolombDecoder.readUnsignedByte(); // constraint_set[0-5]_flag\n\n        levelIdc = expGolombDecoder.readUnsignedByte(); // level_idc u(8)\n\n        expGolombDecoder.skipUnsignedExpGolomb(); // seq_parameter_set_id\n        // some profiles have more optional data we don't need\n\n        if (PROFILES_WITH_OPTIONAL_SPS_DATA[profileIdc]) {\n          chromaFormatIdc = expGolombDecoder.readUnsignedExpGolomb();\n\n          if (chromaFormatIdc === 3) {\n            expGolombDecoder.skipBits(1); // separate_colour_plane_flag\n          }\n\n          expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_luma_minus8\n\n          expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_chroma_minus8\n\n          expGolombDecoder.skipBits(1); // qpprime_y_zero_transform_bypass_flag\n\n          if (expGolombDecoder.readBoolean()) {\n            // seq_scaling_matrix_present_flag\n            scalingListCount = chromaFormatIdc !== 3 ? 8 : 12;\n\n            for (i = 0; i < scalingListCount; i++) {\n              if (expGolombDecoder.readBoolean()) {\n                // seq_scaling_list_present_flag[ i ]\n                if (i < 6) {\n                  skipScalingList(16, expGolombDecoder);\n                } else {\n                  skipScalingList(64, expGolombDecoder);\n                }\n              }\n            }\n          }\n        }\n\n        expGolombDecoder.skipUnsignedExpGolomb(); // log2_max_frame_num_minus4\n\n        picOrderCntType = expGolombDecoder.readUnsignedExpGolomb();\n\n        if (picOrderCntType === 0) {\n          expGolombDecoder.readUnsignedExpGolomb(); // log2_max_pic_order_cnt_lsb_minus4\n        } else if (picOrderCntType === 1) {\n          expGolombDecoder.skipBits(1); // delta_pic_order_always_zero_flag\n\n          expGolombDecoder.skipExpGolomb(); // offset_for_non_ref_pic\n\n          expGolombDecoder.skipExpGolomb(); // offset_for_top_to_bottom_field\n\n          numRefFramesInPicOrderCntCycle = expGolombDecoder.readUnsignedExpGolomb();\n\n          for (i = 0; i < numRefFramesInPicOrderCntCycle; i++) {\n            expGolombDecoder.skipExpGolomb(); // offset_for_ref_frame[ i ]\n          }\n        }\n\n        expGolombDecoder.skipUnsignedExpGolomb(); // max_num_ref_frames\n\n        expGolombDecoder.skipBits(1); // gaps_in_frame_num_value_allowed_flag\n\n        picWidthInMbsMinus1 = expGolombDecoder.readUnsignedExpGolomb();\n        picHeightInMapUnitsMinus1 = expGolombDecoder.readUnsignedExpGolomb();\n        frameMbsOnlyFlag = expGolombDecoder.readBits(1);\n\n        if (frameMbsOnlyFlag === 0) {\n          expGolombDecoder.skipBits(1); // mb_adaptive_frame_field_flag\n        }\n\n        expGolombDecoder.skipBits(1); // direct_8x8_inference_flag\n\n        if (expGolombDecoder.readBoolean()) {\n          // frame_cropping_flag\n          frameCropLeftOffset = expGolombDecoder.readUnsignedExpGolomb();\n          frameCropRightOffset = expGolombDecoder.readUnsignedExpGolomb();\n          frameCropTopOffset = expGolombDecoder.readUnsignedExpGolomb();\n          frameCropBottomOffset = expGolombDecoder.readUnsignedExpGolomb();\n        }\n\n        if (expGolombDecoder.readBoolean()) {\n          // vui_parameters_present_flag\n          if (expGolombDecoder.readBoolean()) {\n            // aspect_ratio_info_present_flag\n            aspectRatioIdc = expGolombDecoder.readUnsignedByte();\n\n            switch (aspectRatioIdc) {\n              case 1:\n                sarRatio = [1, 1];\n                break;\n\n              case 2:\n                sarRatio = [12, 11];\n                break;\n\n              case 3:\n                sarRatio = [10, 11];\n                break;\n\n              case 4:\n                sarRatio = [16, 11];\n                break;\n\n              case 5:\n                sarRatio = [40, 33];\n                break;\n\n              case 6:\n                sarRatio = [24, 11];\n                break;\n\n              case 7:\n                sarRatio = [20, 11];\n                break;\n\n              case 8:\n                sarRatio = [32, 11];\n                break;\n\n              case 9:\n                sarRatio = [80, 33];\n                break;\n\n              case 10:\n                sarRatio = [18, 11];\n                break;\n\n              case 11:\n                sarRatio = [15, 11];\n                break;\n\n              case 12:\n                sarRatio = [64, 33];\n                break;\n\n              case 13:\n                sarRatio = [160, 99];\n                break;\n\n              case 14:\n                sarRatio = [4, 3];\n                break;\n\n              case 15:\n                sarRatio = [3, 2];\n                break;\n\n              case 16:\n                sarRatio = [2, 1];\n                break;\n\n              case 255:\n                {\n                  sarRatio = [expGolombDecoder.readUnsignedByte() << 8 | expGolombDecoder.readUnsignedByte(), expGolombDecoder.readUnsignedByte() << 8 | expGolombDecoder.readUnsignedByte()];\n                  break;\n                }\n            }\n\n            if (sarRatio) {\n              sarScale = sarRatio[0] / sarRatio[1];\n            }\n          }\n        }\n\n        return {\n          profileIdc: profileIdc,\n          levelIdc: levelIdc,\n          profileCompatibility: profileCompatibility,\n          width: Math.ceil(((picWidthInMbsMinus1 + 1) * 16 - frameCropLeftOffset * 2 - frameCropRightOffset * 2) * sarScale),\n          height: (2 - frameMbsOnlyFlag) * (picHeightInMapUnitsMinus1 + 1) * 16 - frameCropTopOffset * 2 - frameCropBottomOffset * 2,\n          sarRatio: sarRatio\n        };\n      };\n    };\n\n    _H264Stream.prototype = new stream();\n    var h264 = {\n      H264Stream: _H264Stream,\n      NalByteStream: _NalByteStream\n    };\n    /**\n     * mux.js\n     *\n     * Copyright (c) Brightcove\n     * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n     *\n     * Utilities to detect basic properties and metadata about Aac data.\n     */\n\n    var ADTS_SAMPLING_FREQUENCIES$1 = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];\n\n    var isLikelyAacData = function isLikelyAacData(data) {\n      if (data[0] === 'I'.charCodeAt(0) && data[1] === 'D'.charCodeAt(0) && data[2] === '3'.charCodeAt(0)) {\n        return true;\n      }\n\n      return false;\n    };\n\n    var parseSyncSafeInteger$1 = function parseSyncSafeInteger(data) {\n      return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];\n    }; // return a percent-encoded representation of the specified byte range\n    // @see http://en.wikipedia.org/wiki/Percent-encoding\n\n\n    var percentEncode$1 = function percentEncode(bytes, start, end) {\n      var i,\n          result = '';\n\n      for (i = start; i < end; i++) {\n        result += '%' + ('00' + bytes[i].toString(16)).slice(-2);\n      }\n\n      return result;\n    }; // return the string representation of the specified byte range,\n    // interpreted as ISO-8859-1.\n\n\n    var parseIso88591$1 = function parseIso88591(bytes, start, end) {\n      return unescape(percentEncode$1(bytes, start, end)); // jshint ignore:line\n    };\n\n    var parseId3TagSize = function parseId3TagSize(header, byteIndex) {\n      var returnSize = header[byteIndex + 6] << 21 | header[byteIndex + 7] << 14 | header[byteIndex + 8] << 7 | header[byteIndex + 9],\n          flags = header[byteIndex + 5],\n          footerPresent = (flags & 16) >> 4;\n\n      if (footerPresent) {\n        return returnSize + 20;\n      }\n\n      return returnSize + 10;\n    };\n\n    var parseAdtsSize = function parseAdtsSize(header, byteIndex) {\n      var lowThree = (header[byteIndex + 5] & 0xE0) >> 5,\n          middle = header[byteIndex + 4] << 3,\n          highTwo = header[byteIndex + 3] & 0x3 << 11;\n      return highTwo | middle | lowThree;\n    };\n\n    var parseType = function parseType(header, byteIndex) {\n      if (header[byteIndex] === 'I'.charCodeAt(0) && header[byteIndex + 1] === 'D'.charCodeAt(0) && header[byteIndex + 2] === '3'.charCodeAt(0)) {\n        return 'timed-metadata';\n      } else if (header[byteIndex] & 0xff === 0xff && (header[byteIndex + 1] & 0xf0) === 0xf0) {\n        return 'audio';\n      }\n\n      return null;\n    };\n\n    var parseSampleRate = function parseSampleRate(packet) {\n      var i = 0;\n\n      while (i + 5 < packet.length) {\n        if (packet[i] !== 0xFF || (packet[i + 1] & 0xF6) !== 0xF0) {\n          // If a valid header was not found,  jump one forward and attempt to\n          // find a valid ADTS header starting at the next byte\n          i++;\n          continue;\n        }\n\n        return ADTS_SAMPLING_FREQUENCIES$1[(packet[i + 2] & 0x3c) >>> 2];\n      }\n\n      return null;\n    };\n\n    var parseAacTimestamp = function parseAacTimestamp(packet) {\n      var frameStart, frameSize, frame, frameHeader; // find the start of the first frame and the end of the tag\n\n      frameStart = 10;\n\n      if (packet[5] & 0x40) {\n        // advance the frame start past the extended header\n        frameStart += 4; // header size field\n\n        frameStart += parseSyncSafeInteger$1(packet.subarray(10, 14));\n      } // parse one or more ID3 frames\n      // http://id3.org/id3v2.3.0#ID3v2_frame_overview\n\n\n      do {\n        // determine the number of bytes in this frame\n        frameSize = parseSyncSafeInteger$1(packet.subarray(frameStart + 4, frameStart + 8));\n\n        if (frameSize < 1) {\n          return null;\n        }\n\n        frameHeader = String.fromCharCode(packet[frameStart], packet[frameStart + 1], packet[frameStart + 2], packet[frameStart + 3]);\n\n        if (frameHeader === 'PRIV') {\n          frame = packet.subarray(frameStart + 10, frameStart + frameSize + 10);\n\n          for (var i = 0; i < frame.byteLength; i++) {\n            if (frame[i] === 0) {\n              var owner = parseIso88591$1(frame, 0, i);\n\n              if (owner === 'com.apple.streaming.transportStreamTimestamp') {\n                var d = frame.subarray(i + 1);\n                var size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;\n                size *= 4;\n                size += d[7] & 0x03;\n                return size;\n              }\n\n              break;\n            }\n          }\n        }\n\n        frameStart += 10; // advance past the frame header\n\n        frameStart += frameSize; // advance past the frame body\n      } while (frameStart < packet.byteLength);\n\n      return null;\n    };\n\n    var utils = {\n      isLikelyAacData: isLikelyAacData,\n      parseId3TagSize: parseId3TagSize,\n      parseAdtsSize: parseAdtsSize,\n      parseType: parseType,\n      parseSampleRate: parseSampleRate,\n      parseAacTimestamp: parseAacTimestamp\n    }; // Constants\n\n    var _AacStream;\n    /**\n     * Splits an incoming stream of binary data into ADTS and ID3 Frames.\n     */\n\n\n    _AacStream = function AacStream() {\n      var everything = new Uint8Array(),\n          timeStamp = 0;\n\n      _AacStream.prototype.init.call(this);\n\n      this.setTimestamp = function (timestamp) {\n        timeStamp = timestamp;\n      };\n\n      this.push = function (bytes) {\n        var frameSize = 0,\n            byteIndex = 0,\n            bytesLeft,\n            chunk,\n            packet,\n            tempLength; // If there are bytes remaining from the last segment, prepend them to the\n        // bytes that were pushed in\n\n        if (everything.length) {\n          tempLength = everything.length;\n          everything = new Uint8Array(bytes.byteLength + tempLength);\n          everything.set(everything.subarray(0, tempLength));\n          everything.set(bytes, tempLength);\n        } else {\n          everything = bytes;\n        }\n\n        while (everything.length - byteIndex >= 3) {\n          if (everything[byteIndex] === 'I'.charCodeAt(0) && everything[byteIndex + 1] === 'D'.charCodeAt(0) && everything[byteIndex + 2] === '3'.charCodeAt(0)) {\n            // Exit early because we don't have enough to parse\n            // the ID3 tag header\n            if (everything.length - byteIndex < 10) {\n              break;\n            } // check framesize\n\n\n            frameSize = utils.parseId3TagSize(everything, byteIndex); // Exit early if we don't have enough in the buffer\n            // to emit a full packet\n            // Add to byteIndex to support multiple ID3 tags in sequence\n\n            if (byteIndex + frameSize > everything.length) {\n              break;\n            }\n\n            chunk = {\n              type: 'timed-metadata',\n              data: everything.subarray(byteIndex, byteIndex + frameSize)\n            };\n            this.trigger('data', chunk);\n            byteIndex += frameSize;\n            continue;\n          } else if ((everything[byteIndex] & 0xff) === 0xff && (everything[byteIndex + 1] & 0xf0) === 0xf0) {\n            // Exit early because we don't have enough to parse\n            // the ADTS frame header\n            if (everything.length - byteIndex < 7) {\n              break;\n            }\n\n            frameSize = utils.parseAdtsSize(everything, byteIndex); // Exit early if we don't have enough in the buffer\n            // to emit a full packet\n\n            if (byteIndex + frameSize > everything.length) {\n              break;\n            }\n\n            packet = {\n              type: 'audio',\n              data: everything.subarray(byteIndex, byteIndex + frameSize),\n              pts: timeStamp,\n              dts: timeStamp\n            };\n            this.trigger('data', packet);\n            byteIndex += frameSize;\n            continue;\n          }\n\n          byteIndex++;\n        }\n\n        bytesLeft = everything.length - byteIndex;\n\n        if (bytesLeft > 0) {\n          everything = everything.subarray(byteIndex);\n        } else {\n          everything = new Uint8Array();\n        }\n      };\n\n      this.reset = function () {\n        everything = new Uint8Array();\n        this.trigger('reset');\n      };\n\n      this.endTimeline = function () {\n        everything = new Uint8Array();\n        this.trigger('endedtimeline');\n      };\n    };\n\n    _AacStream.prototype = new stream();\n    var aac = _AacStream;\n    var H264Stream = h264.H264Stream;\n    var isLikelyAacData$1 = utils.isLikelyAacData;\n    var ONE_SECOND_IN_TS$3 = clock.ONE_SECOND_IN_TS; // constants\n\n    var AUDIO_PROPERTIES = ['audioobjecttype', 'channelcount', 'samplerate', 'samplingfrequencyindex', 'samplesize'];\n    var VIDEO_PROPERTIES = ['width', 'height', 'profileIdc', 'levelIdc', 'profileCompatibility', 'sarRatio']; // object types\n\n    var _VideoSegmentStream, _AudioSegmentStream, _Transmuxer, _CoalesceStream;\n    /**\n     * Compare two arrays (even typed) for same-ness\n     */\n\n\n    var arrayEquals = function arrayEquals(a, b) {\n      var i;\n\n      if (a.length !== b.length) {\n        return false;\n      } // compare the value of each element in the array\n\n\n      for (i = 0; i < a.length; i++) {\n        if (a[i] !== b[i]) {\n          return false;\n        }\n      }\n\n      return true;\n    };\n\n    var generateVideoSegmentTimingInfo = function generateVideoSegmentTimingInfo(baseMediaDecodeTime, startDts, startPts, endDts, endPts, prependedContentDuration) {\n      var ptsOffsetFromDts = startPts - startDts,\n          decodeDuration = endDts - startDts,\n          presentationDuration = endPts - startPts; // The PTS and DTS values are based on the actual stream times from the segment,\n      // however, the player time values will reflect a start from the baseMediaDecodeTime.\n      // In order to provide relevant values for the player times, base timing info on the\n      // baseMediaDecodeTime and the DTS and PTS durations of the segment.\n\n      return {\n        start: {\n          dts: baseMediaDecodeTime,\n          pts: baseMediaDecodeTime + ptsOffsetFromDts\n        },\n        end: {\n          dts: baseMediaDecodeTime + decodeDuration,\n          pts: baseMediaDecodeTime + presentationDuration\n        },\n        prependedContentDuration: prependedContentDuration,\n        baseMediaDecodeTime: baseMediaDecodeTime\n      };\n    };\n    /**\n     * Constructs a single-track, ISO BMFF media segment from AAC data\n     * events. The output of this stream can be fed to a SourceBuffer\n     * configured with a suitable initialization segment.\n     * @param track {object} track metadata configuration\n     * @param options {object} transmuxer options object\n     * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps\n     *        in the source; false to adjust the first segment to start at 0.\n     */\n\n\n    _AudioSegmentStream = function AudioSegmentStream(track, options) {\n      var adtsFrames = [],\n          sequenceNumber = 0,\n          earliestAllowedDts = 0,\n          audioAppendStartTs = 0,\n          videoBaseMediaDecodeTime = Infinity;\n      options = options || {};\n\n      _AudioSegmentStream.prototype.init.call(this);\n\n      this.push = function (data) {\n        trackDecodeInfo.collectDtsInfo(track, data);\n\n        if (track) {\n          AUDIO_PROPERTIES.forEach(function (prop) {\n            track[prop] = data[prop];\n          });\n        } // buffer audio data until end() is called\n\n\n        adtsFrames.push(data);\n      };\n\n      this.setEarliestDts = function (earliestDts) {\n        earliestAllowedDts = earliestDts - track.timelineStartInfo.baseMediaDecodeTime;\n      };\n\n      this.setVideoBaseMediaDecodeTime = function (baseMediaDecodeTime) {\n        videoBaseMediaDecodeTime = baseMediaDecodeTime;\n      };\n\n      this.setAudioAppendStart = function (timestamp) {\n        audioAppendStartTs = timestamp;\n      };\n\n      this.flush = function () {\n        var frames, moof, mdat, boxes, frameDuration; // return early if no audio data has been observed\n\n        if (adtsFrames.length === 0) {\n          this.trigger('done', 'AudioSegmentStream');\n          return;\n        }\n\n        frames = audioFrameUtils.trimAdtsFramesByEarliestDts(adtsFrames, track, earliestAllowedDts);\n        track.baseMediaDecodeTime = trackDecodeInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps);\n        audioFrameUtils.prefixWithSilence(track, frames, audioAppendStartTs, videoBaseMediaDecodeTime); // we have to build the index from byte locations to\n        // samples (that is, adts frames) in the audio data\n\n        track.samples = audioFrameUtils.generateSampleTable(frames); // concatenate the audio data to constuct the mdat\n\n        mdat = mp4Generator.mdat(audioFrameUtils.concatenateFrameData(frames));\n        adtsFrames = [];\n        moof = mp4Generator.moof(sequenceNumber, [track]);\n        boxes = new Uint8Array(moof.byteLength + mdat.byteLength); // bump the sequence number for next time\n\n        sequenceNumber++;\n        boxes.set(moof);\n        boxes.set(mdat, moof.byteLength);\n        trackDecodeInfo.clearDtsInfo(track);\n        frameDuration = Math.ceil(ONE_SECOND_IN_TS$3 * 1024 / track.samplerate); // TODO this check was added to maintain backwards compatibility (particularly with\n        // tests) on adding the timingInfo event. However, it seems unlikely that there's a\n        // valid use-case where an init segment/data should be triggered without associated\n        // frames. Leaving for now, but should be looked into.\n\n        if (frames.length) {\n          this.trigger('timingInfo', {\n            start: frames[0].dts,\n            end: frames[0].dts + frames.length * frameDuration\n          });\n        }\n\n        this.trigger('data', {\n          track: track,\n          boxes: boxes\n        });\n        this.trigger('done', 'AudioSegmentStream');\n      };\n\n      this.reset = function () {\n        trackDecodeInfo.clearDtsInfo(track);\n        adtsFrames = [];\n        this.trigger('reset');\n      };\n    };\n\n    _AudioSegmentStream.prototype = new stream();\n    /**\n     * Constructs a single-track, ISO BMFF media segment from H264 data\n     * events. The output of this stream can be fed to a SourceBuffer\n     * configured with a suitable initialization segment.\n     * @param track {object} track metadata configuration\n     * @param options {object} transmuxer options object\n     * @param options.alignGopsAtEnd {boolean} If true, start from the end of the\n     *        gopsToAlignWith list when attempting to align gop pts\n     * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps\n     *        in the source; false to adjust the first segment to start at 0.\n     */\n\n    _VideoSegmentStream = function VideoSegmentStream(track, options) {\n      var sequenceNumber = 0,\n          nalUnits = [],\n          gopsToAlignWith = [],\n          config,\n          pps;\n      options = options || {};\n\n      _VideoSegmentStream.prototype.init.call(this);\n\n      delete track.minPTS;\n      this.gopCache_ = [];\n      /**\n        * Constructs a ISO BMFF segment given H264 nalUnits\n        * @param {Object} nalUnit A data event representing a nalUnit\n        * @param {String} nalUnit.nalUnitType\n        * @param {Object} nalUnit.config Properties for a mp4 track\n        * @param {Uint8Array} nalUnit.data The nalUnit bytes\n        * @see lib/codecs/h264.js\n       **/\n\n      this.push = function (nalUnit) {\n        trackDecodeInfo.collectDtsInfo(track, nalUnit); // record the track config\n\n        if (nalUnit.nalUnitType === 'seq_parameter_set_rbsp' && !config) {\n          config = nalUnit.config;\n          track.sps = [nalUnit.data];\n          VIDEO_PROPERTIES.forEach(function (prop) {\n            track[prop] = config[prop];\n          }, this);\n        }\n\n        if (nalUnit.nalUnitType === 'pic_parameter_set_rbsp' && !pps) {\n          pps = nalUnit.data;\n          track.pps = [nalUnit.data];\n        } // buffer video until flush() is called\n\n\n        nalUnits.push(nalUnit);\n      };\n      /**\n        * Pass constructed ISO BMFF track and boxes on to the\n        * next stream in the pipeline\n       **/\n\n\n      this.flush = function () {\n        var frames,\n            gopForFusion,\n            gops,\n            moof,\n            mdat,\n            boxes,\n            prependedContentDuration = 0,\n            firstGop,\n            lastGop; // Throw away nalUnits at the start of the byte stream until\n        // we find the first AUD\n\n        while (nalUnits.length) {\n          if (nalUnits[0].nalUnitType === 'access_unit_delimiter_rbsp') {\n            break;\n          }\n\n          nalUnits.shift();\n        } // Return early if no video data has been observed\n\n\n        if (nalUnits.length === 0) {\n          this.resetStream_();\n          this.trigger('done', 'VideoSegmentStream');\n          return;\n        } // Organize the raw nal-units into arrays that represent\n        // higher-level constructs such as frames and gops\n        // (group-of-pictures)\n\n\n        frames = frameUtils.groupNalsIntoFrames(nalUnits);\n        gops = frameUtils.groupFramesIntoGops(frames); // If the first frame of this fragment is not a keyframe we have\n        // a problem since MSE (on Chrome) requires a leading keyframe.\n        //\n        // We have two approaches to repairing this situation:\n        // 1) GOP-FUSION:\n        //    This is where we keep track of the GOPS (group-of-pictures)\n        //    from previous fragments and attempt to find one that we can\n        //    prepend to the current fragment in order to create a valid\n        //    fragment.\n        // 2) KEYFRAME-PULLING:\n        //    Here we search for the first keyframe in the fragment and\n        //    throw away all the frames between the start of the fragment\n        //    and that keyframe. We then extend the duration and pull the\n        //    PTS of the keyframe forward so that it covers the time range\n        //    of the frames that were disposed of.\n        //\n        // #1 is far prefereable over #2 which can cause \"stuttering\" but\n        // requires more things to be just right.\n\n        if (!gops[0][0].keyFrame) {\n          // Search for a gop for fusion from our gopCache\n          gopForFusion = this.getGopForFusion_(nalUnits[0], track);\n\n          if (gopForFusion) {\n            // in order to provide more accurate timing information about the segment, save\n            // the number of seconds prepended to the original segment due to GOP fusion\n            prependedContentDuration = gopForFusion.duration;\n            gops.unshift(gopForFusion); // Adjust Gops' metadata to account for the inclusion of the\n            // new gop at the beginning\n\n            gops.byteLength += gopForFusion.byteLength;\n            gops.nalCount += gopForFusion.nalCount;\n            gops.pts = gopForFusion.pts;\n            gops.dts = gopForFusion.dts;\n            gops.duration += gopForFusion.duration;\n          } else {\n            // If we didn't find a candidate gop fall back to keyframe-pulling\n            gops = frameUtils.extendFirstKeyFrame(gops);\n          }\n        } // Trim gops to align with gopsToAlignWith\n\n\n        if (gopsToAlignWith.length) {\n          var alignedGops;\n\n          if (options.alignGopsAtEnd) {\n            alignedGops = this.alignGopsAtEnd_(gops);\n          } else {\n            alignedGops = this.alignGopsAtStart_(gops);\n          }\n\n          if (!alignedGops) {\n            // save all the nals in the last GOP into the gop cache\n            this.gopCache_.unshift({\n              gop: gops.pop(),\n              pps: track.pps,\n              sps: track.sps\n            }); // Keep a maximum of 6 GOPs in the cache\n\n            this.gopCache_.length = Math.min(6, this.gopCache_.length); // Clear nalUnits\n\n            nalUnits = []; // return early no gops can be aligned with desired gopsToAlignWith\n\n            this.resetStream_();\n            this.trigger('done', 'VideoSegmentStream');\n            return;\n          } // Some gops were trimmed. clear dts info so minSegmentDts and pts are correct\n          // when recalculated before sending off to CoalesceStream\n\n\n          trackDecodeInfo.clearDtsInfo(track);\n          gops = alignedGops;\n        }\n\n        trackDecodeInfo.collectDtsInfo(track, gops); // First, we have to build the index from byte locations to\n        // samples (that is, frames) in the video data\n\n        track.samples = frameUtils.generateSampleTable(gops); // Concatenate the video data and construct the mdat\n\n        mdat = mp4Generator.mdat(frameUtils.concatenateNalData(gops));\n        track.baseMediaDecodeTime = trackDecodeInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps);\n        this.trigger('processedGopsInfo', gops.map(function (gop) {\n          return {\n            pts: gop.pts,\n            dts: gop.dts,\n            byteLength: gop.byteLength\n          };\n        }));\n        firstGop = gops[0];\n        lastGop = gops[gops.length - 1];\n        this.trigger('segmentTimingInfo', generateVideoSegmentTimingInfo(track.baseMediaDecodeTime, firstGop.dts, firstGop.pts, lastGop.dts + lastGop.duration, lastGop.pts + lastGop.duration, prependedContentDuration));\n        this.trigger('timingInfo', {\n          start: gops[0].dts,\n          end: gops[gops.length - 1].dts + gops[gops.length - 1].duration\n        }); // save all the nals in the last GOP into the gop cache\n\n        this.gopCache_.unshift({\n          gop: gops.pop(),\n          pps: track.pps,\n          sps: track.sps\n        }); // Keep a maximum of 6 GOPs in the cache\n\n        this.gopCache_.length = Math.min(6, this.gopCache_.length); // Clear nalUnits\n\n        nalUnits = [];\n        this.trigger('baseMediaDecodeTime', track.baseMediaDecodeTime);\n        this.trigger('timelineStartInfo', track.timelineStartInfo);\n        moof = mp4Generator.moof(sequenceNumber, [track]); // it would be great to allocate this array up front instead of\n        // throwing away hundreds of media segment fragments\n\n        boxes = new Uint8Array(moof.byteLength + mdat.byteLength); // Bump the sequence number for next time\n\n        sequenceNumber++;\n        boxes.set(moof);\n        boxes.set(mdat, moof.byteLength);\n        this.trigger('data', {\n          track: track,\n          boxes: boxes\n        });\n        this.resetStream_(); // Continue with the flush process now\n\n        this.trigger('done', 'VideoSegmentStream');\n      };\n\n      this.reset = function () {\n        this.resetStream_();\n        nalUnits = [];\n        this.gopCache_.length = 0;\n        gopsToAlignWith.length = 0;\n        this.trigger('reset');\n      };\n\n      this.resetStream_ = function () {\n        trackDecodeInfo.clearDtsInfo(track); // reset config and pps because they may differ across segments\n        // for instance, when we are rendition switching\n\n        config = undefined;\n        pps = undefined;\n      }; // Search for a candidate Gop for gop-fusion from the gop cache and\n      // return it or return null if no good candidate was found\n\n\n      this.getGopForFusion_ = function (nalUnit) {\n        var halfSecond = 45000,\n            // Half-a-second in a 90khz clock\n        allowableOverlap = 10000,\n            // About 3 frames @ 30fps\n        nearestDistance = Infinity,\n            dtsDistance,\n            nearestGopObj,\n            currentGop,\n            currentGopObj,\n            i; // Search for the GOP nearest to the beginning of this nal unit\n\n        for (i = 0; i < this.gopCache_.length; i++) {\n          currentGopObj = this.gopCache_[i];\n          currentGop = currentGopObj.gop; // Reject Gops with different SPS or PPS\n\n          if (!(track.pps && arrayEquals(track.pps[0], currentGopObj.pps[0])) || !(track.sps && arrayEquals(track.sps[0], currentGopObj.sps[0]))) {\n            continue;\n          } // Reject Gops that would require a negative baseMediaDecodeTime\n\n\n          if (currentGop.dts < track.timelineStartInfo.dts) {\n            continue;\n          } // The distance between the end of the gop and the start of the nalUnit\n\n\n          dtsDistance = nalUnit.dts - currentGop.dts - currentGop.duration; // Only consider GOPS that start before the nal unit and end within\n          // a half-second of the nal unit\n\n          if (dtsDistance >= -allowableOverlap && dtsDistance <= halfSecond) {\n            // Always use the closest GOP we found if there is more than\n            // one candidate\n            if (!nearestGopObj || nearestDistance > dtsDistance) {\n              nearestGopObj = currentGopObj;\n              nearestDistance = dtsDistance;\n            }\n          }\n        }\n\n        if (nearestGopObj) {\n          return nearestGopObj.gop;\n        }\n\n        return null;\n      }; // trim gop list to the first gop found that has a matching pts with a gop in the list\n      // of gopsToAlignWith starting from the START of the list\n\n\n      this.alignGopsAtStart_ = function (gops) {\n        var alignIndex, gopIndex, align, gop, byteLength, nalCount, duration, alignedGops;\n        byteLength = gops.byteLength;\n        nalCount = gops.nalCount;\n        duration = gops.duration;\n        alignIndex = gopIndex = 0;\n\n        while (alignIndex < gopsToAlignWith.length && gopIndex < gops.length) {\n          align = gopsToAlignWith[alignIndex];\n          gop = gops[gopIndex];\n\n          if (align.pts === gop.pts) {\n            break;\n          }\n\n          if (gop.pts > align.pts) {\n            // this current gop starts after the current gop we want to align on, so increment\n            // align index\n            alignIndex++;\n            continue;\n          } // current gop starts before the current gop we want to align on. so increment gop\n          // index\n\n\n          gopIndex++;\n          byteLength -= gop.byteLength;\n          nalCount -= gop.nalCount;\n          duration -= gop.duration;\n        }\n\n        if (gopIndex === 0) {\n          // no gops to trim\n          return gops;\n        }\n\n        if (gopIndex === gops.length) {\n          // all gops trimmed, skip appending all gops\n          return null;\n        }\n\n        alignedGops = gops.slice(gopIndex);\n        alignedGops.byteLength = byteLength;\n        alignedGops.duration = duration;\n        alignedGops.nalCount = nalCount;\n        alignedGops.pts = alignedGops[0].pts;\n        alignedGops.dts = alignedGops[0].dts;\n        return alignedGops;\n      }; // trim gop list to the first gop found that has a matching pts with a gop in the list\n      // of gopsToAlignWith starting from the END of the list\n\n\n      this.alignGopsAtEnd_ = function (gops) {\n        var alignIndex, gopIndex, align, gop, alignEndIndex, matchFound;\n        alignIndex = gopsToAlignWith.length - 1;\n        gopIndex = gops.length - 1;\n        alignEndIndex = null;\n        matchFound = false;\n\n        while (alignIndex >= 0 && gopIndex >= 0) {\n          align = gopsToAlignWith[alignIndex];\n          gop = gops[gopIndex];\n\n          if (align.pts === gop.pts) {\n            matchFound = true;\n            break;\n          }\n\n          if (align.pts > gop.pts) {\n            alignIndex--;\n            continue;\n          }\n\n          if (alignIndex === gopsToAlignWith.length - 1) {\n            // gop.pts is greater than the last alignment candidate. If no match is found\n            // by the end of this loop, we still want to append gops that come after this\n            // point\n            alignEndIndex = gopIndex;\n          }\n\n          gopIndex--;\n        }\n\n        if (!matchFound && alignEndIndex === null) {\n          return null;\n        }\n\n        var trimIndex;\n\n        if (matchFound) {\n          trimIndex = gopIndex;\n        } else {\n          trimIndex = alignEndIndex;\n        }\n\n        if (trimIndex === 0) {\n          return gops;\n        }\n\n        var alignedGops = gops.slice(trimIndex);\n        var metadata = alignedGops.reduce(function (total, gop) {\n          total.byteLength += gop.byteLength;\n          total.duration += gop.duration;\n          total.nalCount += gop.nalCount;\n          return total;\n        }, {\n          byteLength: 0,\n          duration: 0,\n          nalCount: 0\n        });\n        alignedGops.byteLength = metadata.byteLength;\n        alignedGops.duration = metadata.duration;\n        alignedGops.nalCount = metadata.nalCount;\n        alignedGops.pts = alignedGops[0].pts;\n        alignedGops.dts = alignedGops[0].dts;\n        return alignedGops;\n      };\n\n      this.alignGopsWith = function (newGopsToAlignWith) {\n        gopsToAlignWith = newGopsToAlignWith;\n      };\n    };\n\n    _VideoSegmentStream.prototype = new stream();\n    /**\n     * A Stream that can combine multiple streams (ie. audio & video)\n     * into a single output segment for MSE. Also supports audio-only\n     * and video-only streams.\n     * @param options {object} transmuxer options object\n     * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps\n     *        in the source; false to adjust the first segment to start at media timeline start.\n     */\n\n    _CoalesceStream = function CoalesceStream(options, metadataStream) {\n      // Number of Tracks per output segment\n      // If greater than 1, we combine multiple\n      // tracks into a single segment\n      this.numberOfTracks = 0;\n      this.metadataStream = metadataStream;\n      options = options || {};\n\n      if (typeof options.remux !== 'undefined') {\n        this.remuxTracks = !!options.remux;\n      } else {\n        this.remuxTracks = true;\n      }\n\n      if (typeof options.keepOriginalTimestamps === 'boolean') {\n        this.keepOriginalTimestamps = options.keepOriginalTimestamps;\n      } else {\n        this.keepOriginalTimestamps = false;\n      }\n\n      this.pendingTracks = [];\n      this.videoTrack = null;\n      this.pendingBoxes = [];\n      this.pendingCaptions = [];\n      this.pendingMetadata = [];\n      this.pendingBytes = 0;\n      this.emittedTracks = 0;\n\n      _CoalesceStream.prototype.init.call(this); // Take output from multiple\n\n\n      this.push = function (output) {\n        // buffer incoming captions until the associated video segment\n        // finishes\n        if (output.text) {\n          return this.pendingCaptions.push(output);\n        } // buffer incoming id3 tags until the final flush\n\n\n        if (output.frames) {\n          return this.pendingMetadata.push(output);\n        } // Add this track to the list of pending tracks and store\n        // important information required for the construction of\n        // the final segment\n\n\n        this.pendingTracks.push(output.track);\n        this.pendingBytes += output.boxes.byteLength; // TODO: is there an issue for this against chrome?\n        // We unshift audio and push video because\n        // as of Chrome 75 when switching from\n        // one init segment to another if the video\n        // mdat does not appear after the audio mdat\n        // only audio will play for the duration of our transmux.\n\n        if (output.track.type === 'video') {\n          this.videoTrack = output.track;\n          this.pendingBoxes.push(output.boxes);\n        }\n\n        if (output.track.type === 'audio') {\n          this.audioTrack = output.track;\n          this.pendingBoxes.unshift(output.boxes);\n        }\n      };\n    };\n\n    _CoalesceStream.prototype = new stream();\n\n    _CoalesceStream.prototype.flush = function (flushSource) {\n      var offset = 0,\n          event = {\n        captions: [],\n        captionStreams: {},\n        metadata: [],\n        info: {}\n      },\n          caption,\n          id3,\n          initSegment,\n          timelineStartPts = 0,\n          i;\n\n      if (this.pendingTracks.length < this.numberOfTracks) {\n        if (flushSource !== 'VideoSegmentStream' && flushSource !== 'AudioSegmentStream') {\n          // Return because we haven't received a flush from a data-generating\n          // portion of the segment (meaning that we have only recieved meta-data\n          // or captions.)\n          return;\n        } else if (this.remuxTracks) {\n          // Return until we have enough tracks from the pipeline to remux (if we\n          // are remuxing audio and video into a single MP4)\n          return;\n        } else if (this.pendingTracks.length === 0) {\n          // In the case where we receive a flush without any data having been\n          // received we consider it an emitted track for the purposes of coalescing\n          // `done` events.\n          // We do this for the case where there is an audio and video track in the\n          // segment but no audio data. (seen in several playlists with alternate\n          // audio tracks and no audio present in the main TS segments.)\n          this.emittedTracks++;\n\n          if (this.emittedTracks >= this.numberOfTracks) {\n            this.trigger('done');\n            this.emittedTracks = 0;\n          }\n\n          return;\n        }\n      }\n\n      if (this.videoTrack) {\n        timelineStartPts = this.videoTrack.timelineStartInfo.pts;\n        VIDEO_PROPERTIES.forEach(function (prop) {\n          event.info[prop] = this.videoTrack[prop];\n        }, this);\n      } else if (this.audioTrack) {\n        timelineStartPts = this.audioTrack.timelineStartInfo.pts;\n        AUDIO_PROPERTIES.forEach(function (prop) {\n          event.info[prop] = this.audioTrack[prop];\n        }, this);\n      }\n\n      if (this.videoTrack || this.audioTrack) {\n        if (this.pendingTracks.length === 1) {\n          event.type = this.pendingTracks[0].type;\n        } else {\n          event.type = 'combined';\n        }\n\n        this.emittedTracks += this.pendingTracks.length;\n        initSegment = mp4Generator.initSegment(this.pendingTracks); // Create a new typed array to hold the init segment\n\n        event.initSegment = new Uint8Array(initSegment.byteLength); // Create an init segment containing a moov\n        // and track definitions\n\n        event.initSegment.set(initSegment); // Create a new typed array to hold the moof+mdats\n\n        event.data = new Uint8Array(this.pendingBytes); // Append each moof+mdat (one per track) together\n\n        for (i = 0; i < this.pendingBoxes.length; i++) {\n          event.data.set(this.pendingBoxes[i], offset);\n          offset += this.pendingBoxes[i].byteLength;\n        } // Translate caption PTS times into second offsets to match the\n        // video timeline for the segment, and add track info\n\n\n        for (i = 0; i < this.pendingCaptions.length; i++) {\n          caption = this.pendingCaptions[i];\n          caption.startTime = clock.metadataTsToSeconds(caption.startPts, timelineStartPts, this.keepOriginalTimestamps);\n          caption.endTime = clock.metadataTsToSeconds(caption.endPts, timelineStartPts, this.keepOriginalTimestamps);\n          event.captionStreams[caption.stream] = true;\n          event.captions.push(caption);\n        } // Translate ID3 frame PTS times into second offsets to match the\n        // video timeline for the segment\n\n\n        for (i = 0; i < this.pendingMetadata.length; i++) {\n          id3 = this.pendingMetadata[i];\n          id3.cueTime = clock.metadataTsToSeconds(id3.pts, timelineStartPts, this.keepOriginalTimestamps);\n          event.metadata.push(id3);\n        } // We add this to every single emitted segment even though we only need\n        // it for the first\n\n\n        event.metadata.dispatchType = this.metadataStream.dispatchType; // Reset stream state\n\n        this.pendingTracks.length = 0;\n        this.videoTrack = null;\n        this.pendingBoxes.length = 0;\n        this.pendingCaptions.length = 0;\n        this.pendingBytes = 0;\n        this.pendingMetadata.length = 0; // Emit the built segment\n        // We include captions and ID3 tags for backwards compatibility,\n        // ideally we should send only video and audio in the data event\n\n        this.trigger('data', event); // Emit each caption to the outside world\n        // Ideally, this would happen immediately on parsing captions,\n        // but we need to ensure that video data is sent back first\n        // so that caption timing can be adjusted to match video timing\n\n        for (i = 0; i < event.captions.length; i++) {\n          caption = event.captions[i];\n          this.trigger('caption', caption);\n        } // Emit each id3 tag to the outside world\n        // Ideally, this would happen immediately on parsing the tag,\n        // but we need to ensure that video data is sent back first\n        // so that ID3 frame timing can be adjusted to match video timing\n\n\n        for (i = 0; i < event.metadata.length; i++) {\n          id3 = event.metadata[i];\n          this.trigger('id3Frame', id3);\n        }\n      } // Only emit `done` if all tracks have been flushed and emitted\n\n\n      if (this.emittedTracks >= this.numberOfTracks) {\n        this.trigger('done');\n        this.emittedTracks = 0;\n      }\n    };\n\n    _CoalesceStream.prototype.setRemux = function (val) {\n      this.remuxTracks = val;\n    };\n    /**\n     * A Stream that expects MP2T binary data as input and produces\n     * corresponding media segments, suitable for use with Media Source\n     * Extension (MSE) implementations that support the ISO BMFF byte\n     * stream format, like Chrome.\n     */\n\n\n    _Transmuxer = function Transmuxer(options) {\n      var self = this,\n          hasFlushed = true,\n          videoTrack,\n          audioTrack;\n\n      _Transmuxer.prototype.init.call(this);\n\n      options = options || {};\n      this.baseMediaDecodeTime = options.baseMediaDecodeTime || 0;\n      this.transmuxPipeline_ = {};\n\n      this.setupAacPipeline = function () {\n        var pipeline = {};\n        this.transmuxPipeline_ = pipeline;\n        pipeline.type = 'aac';\n        pipeline.metadataStream = new m2ts_1.MetadataStream(); // set up the parsing pipeline\n\n        pipeline.aacStream = new aac();\n        pipeline.audioTimestampRolloverStream = new m2ts_1.TimestampRolloverStream('audio');\n        pipeline.timedMetadataTimestampRolloverStream = new m2ts_1.TimestampRolloverStream('timed-metadata');\n        pipeline.adtsStream = new adts();\n        pipeline.coalesceStream = new _CoalesceStream(options, pipeline.metadataStream);\n        pipeline.headOfPipeline = pipeline.aacStream;\n        pipeline.aacStream.pipe(pipeline.audioTimestampRolloverStream).pipe(pipeline.adtsStream);\n        pipeline.aacStream.pipe(pipeline.timedMetadataTimestampRolloverStream).pipe(pipeline.metadataStream).pipe(pipeline.coalesceStream);\n        pipeline.metadataStream.on('timestamp', function (frame) {\n          pipeline.aacStream.setTimestamp(frame.timeStamp);\n        });\n        pipeline.aacStream.on('data', function (data) {\n          if (data.type === 'timed-metadata' && !pipeline.audioSegmentStream) {\n            audioTrack = audioTrack || {\n              timelineStartInfo: {\n                baseMediaDecodeTime: self.baseMediaDecodeTime\n              },\n              codec: 'adts',\n              type: 'audio'\n            }; // hook up the audio segment stream to the first track with aac data\n\n            pipeline.coalesceStream.numberOfTracks++;\n            pipeline.audioSegmentStream = new _AudioSegmentStream(audioTrack, options);\n            pipeline.audioSegmentStream.on('timingInfo', self.trigger.bind(self, 'audioTimingInfo')); // Set up the final part of the audio pipeline\n\n            pipeline.adtsStream.pipe(pipeline.audioSegmentStream).pipe(pipeline.coalesceStream);\n          } // emit pmt info\n\n\n          self.trigger('trackinfo', {\n            hasAudio: !!audioTrack,\n            hasVideo: !!videoTrack\n          });\n        }); // Re-emit any data coming from the coalesce stream to the outside world\n\n        pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data')); // Let the consumer know we have finished flushing the entire pipeline\n\n        pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done'));\n      };\n\n      this.setupTsPipeline = function () {\n        var pipeline = {};\n        this.transmuxPipeline_ = pipeline;\n        pipeline.type = 'ts';\n        pipeline.metadataStream = new m2ts_1.MetadataStream(); // set up the parsing pipeline\n\n        pipeline.packetStream = new m2ts_1.TransportPacketStream();\n        pipeline.parseStream = new m2ts_1.TransportParseStream();\n        pipeline.elementaryStream = new m2ts_1.ElementaryStream();\n        pipeline.timestampRolloverStream = new m2ts_1.TimestampRolloverStream();\n        pipeline.adtsStream = new adts();\n        pipeline.h264Stream = new H264Stream();\n        pipeline.captionStream = new m2ts_1.CaptionStream();\n        pipeline.coalesceStream = new _CoalesceStream(options, pipeline.metadataStream);\n        pipeline.headOfPipeline = pipeline.packetStream; // disassemble MPEG2-TS packets into elementary streams\n\n        pipeline.packetStream.pipe(pipeline.parseStream).pipe(pipeline.elementaryStream).pipe(pipeline.timestampRolloverStream); // !!THIS ORDER IS IMPORTANT!!\n        // demux the streams\n\n        pipeline.timestampRolloverStream.pipe(pipeline.h264Stream);\n        pipeline.timestampRolloverStream.pipe(pipeline.adtsStream);\n        pipeline.timestampRolloverStream.pipe(pipeline.metadataStream).pipe(pipeline.coalesceStream); // Hook up CEA-608/708 caption stream\n\n        pipeline.h264Stream.pipe(pipeline.captionStream).pipe(pipeline.coalesceStream);\n        pipeline.elementaryStream.on('data', function (data) {\n          var i;\n\n          if (data.type === 'metadata') {\n            i = data.tracks.length; // scan the tracks listed in the metadata\n\n            while (i--) {\n              if (!videoTrack && data.tracks[i].type === 'video') {\n                videoTrack = data.tracks[i];\n                videoTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime;\n              } else if (!audioTrack && data.tracks[i].type === 'audio') {\n                audioTrack = data.tracks[i];\n                audioTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime;\n              }\n            } // hook up the video segment stream to the first track with h264 data\n\n\n            if (videoTrack && !pipeline.videoSegmentStream) {\n              pipeline.coalesceStream.numberOfTracks++;\n              pipeline.videoSegmentStream = new _VideoSegmentStream(videoTrack, options);\n              pipeline.videoSegmentStream.on('timelineStartInfo', function (timelineStartInfo) {\n                // When video emits timelineStartInfo data after a flush, we forward that\n                // info to the AudioSegmentStream, if it exists, because video timeline\n                // data takes precedence.\n                if (audioTrack) {\n                  audioTrack.timelineStartInfo = timelineStartInfo; // On the first segment we trim AAC frames that exist before the\n                  // very earliest DTS we have seen in video because Chrome will\n                  // interpret any video track with a baseMediaDecodeTime that is\n                  // non-zero as a gap.\n\n                  pipeline.audioSegmentStream.setEarliestDts(timelineStartInfo.dts);\n                }\n              });\n              pipeline.videoSegmentStream.on('processedGopsInfo', self.trigger.bind(self, 'gopInfo'));\n              pipeline.videoSegmentStream.on('segmentTimingInfo', self.trigger.bind(self, 'videoSegmentTimingInfo'));\n              pipeline.videoSegmentStream.on('baseMediaDecodeTime', function (baseMediaDecodeTime) {\n                if (audioTrack) {\n                  pipeline.audioSegmentStream.setVideoBaseMediaDecodeTime(baseMediaDecodeTime);\n                }\n              });\n              pipeline.videoSegmentStream.on('timingInfo', self.trigger.bind(self, 'videoTimingInfo')); // Set up the final part of the video pipeline\n\n              pipeline.h264Stream.pipe(pipeline.videoSegmentStream).pipe(pipeline.coalesceStream);\n            }\n\n            if (audioTrack && !pipeline.audioSegmentStream) {\n              // hook up the audio segment stream to the first track with aac data\n              pipeline.coalesceStream.numberOfTracks++;\n              pipeline.audioSegmentStream = new _AudioSegmentStream(audioTrack, options);\n              pipeline.audioSegmentStream.on('timingInfo', self.trigger.bind(self, 'audioTimingInfo')); // Set up the final part of the audio pipeline\n\n              pipeline.adtsStream.pipe(pipeline.audioSegmentStream).pipe(pipeline.coalesceStream);\n            } // emit pmt info\n\n\n            self.trigger('trackinfo', {\n              hasAudio: !!audioTrack,\n              hasVideo: !!videoTrack\n            });\n          }\n        }); // Re-emit any data coming from the coalesce stream to the outside world\n\n        pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data'));\n        pipeline.coalesceStream.on('id3Frame', function (id3Frame) {\n          id3Frame.dispatchType = pipeline.metadataStream.dispatchType;\n          self.trigger('id3Frame', id3Frame);\n        });\n        pipeline.coalesceStream.on('caption', this.trigger.bind(this, 'caption')); // Let the consumer know we have finished flushing the entire pipeline\n\n        pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done'));\n      }; // hook up the segment streams once track metadata is delivered\n\n\n      this.setBaseMediaDecodeTime = function (baseMediaDecodeTime) {\n        var pipeline = this.transmuxPipeline_;\n\n        if (!options.keepOriginalTimestamps) {\n          this.baseMediaDecodeTime = baseMediaDecodeTime;\n        }\n\n        if (audioTrack) {\n          audioTrack.timelineStartInfo.dts = undefined;\n          audioTrack.timelineStartInfo.pts = undefined;\n          trackDecodeInfo.clearDtsInfo(audioTrack);\n\n          if (!options.keepOriginalTimestamps) {\n            audioTrack.timelineStartInfo.baseMediaDecodeTime = baseMediaDecodeTime;\n          }\n\n          if (pipeline.audioTimestampRolloverStream) {\n            pipeline.audioTimestampRolloverStream.discontinuity();\n          }\n        }\n\n        if (videoTrack) {\n          if (pipeline.videoSegmentStream) {\n            pipeline.videoSegmentStream.gopCache_ = [];\n          }\n\n          videoTrack.timelineStartInfo.dts = undefined;\n          videoTrack.timelineStartInfo.pts = undefined;\n          trackDecodeInfo.clearDtsInfo(videoTrack);\n          pipeline.captionStream.reset();\n\n          if (!options.keepOriginalTimestamps) {\n            videoTrack.timelineStartInfo.baseMediaDecodeTime = baseMediaDecodeTime;\n          }\n        }\n\n        if (pipeline.timestampRolloverStream) {\n          pipeline.timestampRolloverStream.discontinuity();\n        }\n      };\n\n      this.setAudioAppendStart = function (timestamp) {\n        if (audioTrack) {\n          this.transmuxPipeline_.audioSegmentStream.setAudioAppendStart(timestamp);\n        }\n      };\n\n      this.setRemux = function (val) {\n        var pipeline = this.transmuxPipeline_;\n        options.remux = val;\n\n        if (pipeline && pipeline.coalesceStream) {\n          pipeline.coalesceStream.setRemux(val);\n        }\n      };\n\n      this.alignGopsWith = function (gopsToAlignWith) {\n        if (videoTrack && this.transmuxPipeline_.videoSegmentStream) {\n          this.transmuxPipeline_.videoSegmentStream.alignGopsWith(gopsToAlignWith);\n        }\n      }; // feed incoming data to the front of the parsing pipeline\n\n\n      this.push = function (data) {\n        if (hasFlushed) {\n          var isAac = isLikelyAacData$1(data);\n\n          if (isAac && this.transmuxPipeline_.type !== 'aac') {\n            this.setupAacPipeline();\n          } else if (!isAac && this.transmuxPipeline_.type !== 'ts') {\n            this.setupTsPipeline();\n          }\n\n          hasFlushed = false;\n        }\n\n        this.transmuxPipeline_.headOfPipeline.push(data);\n      }; // flush any buffered data\n\n\n      this.flush = function () {\n        hasFlushed = true; // Start at the top of the pipeline and flush all pending work\n\n        this.transmuxPipeline_.headOfPipeline.flush();\n      };\n\n      this.endTimeline = function () {\n        this.transmuxPipeline_.headOfPipeline.endTimeline();\n      };\n\n      this.reset = function () {\n        if (this.transmuxPipeline_.headOfPipeline) {\n          this.transmuxPipeline_.headOfPipeline.reset();\n        }\n      }; // Caption data has to be reset when seeking outside buffered range\n\n\n      this.resetCaptions = function () {\n        if (this.transmuxPipeline_.captionStream) {\n          this.transmuxPipeline_.captionStream.reset();\n        }\n      };\n    };\n\n    _Transmuxer.prototype = new stream();\n    var transmuxer = {\n      Transmuxer: _Transmuxer,\n      VideoSegmentStream: _VideoSegmentStream,\n      AudioSegmentStream: _AudioSegmentStream,\n      AUDIO_PROPERTIES: AUDIO_PROPERTIES,\n      VIDEO_PROPERTIES: VIDEO_PROPERTIES,\n      // exported for testing\n      generateVideoSegmentTimingInfo: generateVideoSegmentTimingInfo\n    };\n\n    var classCallCheck = function classCallCheck(instance, Constructor) {\n      if (!(instance instanceof Constructor)) {\n        throw new TypeError(\"Cannot call a class as a function\");\n      }\n    };\n\n    var createClass = function () {\n      function defineProperties(target, props) {\n        for (var i = 0; i < props.length; i++) {\n          var descriptor = props[i];\n          descriptor.enumerable = descriptor.enumerable || false;\n          descriptor.configurable = true;\n          if (\"value\" in descriptor) descriptor.writable = true;\n          Object.defineProperty(target, descriptor.key, descriptor);\n        }\n      }\n\n      return function (Constructor, protoProps, staticProps) {\n        if (protoProps) defineProperties(Constructor.prototype, protoProps);\n        if (staticProps) defineProperties(Constructor, staticProps);\n        return Constructor;\n      };\n    }();\n    /**\n     * @file transmuxer-worker.js\n     */\n\n    /**\n     * Re-emits transmuxer events by converting them into messages to the\n     * world outside the worker.\n     *\n     * @param {Object} transmuxer the transmuxer to wire events on\n     * @private\n     */\n\n\n    var wireTransmuxerEvents = function wireTransmuxerEvents(self, transmuxer$$1) {\n      transmuxer$$1.on('data', function (segment) {\n        // transfer ownership of the underlying ArrayBuffer\n        // instead of doing a copy to save memory\n        // ArrayBuffers are transferable but generic TypedArrays are not\n        // @link https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers#Passing_data_by_transferring_ownership_(transferable_objects)\n        var initArray = segment.initSegment;\n        segment.initSegment = {\n          data: initArray.buffer,\n          byteOffset: initArray.byteOffset,\n          byteLength: initArray.byteLength\n        };\n        var typedArray = segment.data;\n        segment.data = typedArray.buffer;\n        self.postMessage({\n          action: 'data',\n          segment: segment,\n          byteOffset: typedArray.byteOffset,\n          byteLength: typedArray.byteLength\n        }, [segment.data]);\n      });\n\n      if (transmuxer$$1.captionStream) {\n        transmuxer$$1.captionStream.on('data', function (caption) {\n          self.postMessage({\n            action: 'caption',\n            data: caption\n          });\n        });\n      }\n\n      transmuxer$$1.on('done', function (data) {\n        self.postMessage({\n          action: 'done'\n        });\n      });\n      transmuxer$$1.on('gopInfo', function (gopInfo) {\n        self.postMessage({\n          action: 'gopInfo',\n          gopInfo: gopInfo\n        });\n      });\n      transmuxer$$1.on('videoSegmentTimingInfo', function (videoSegmentTimingInfo) {\n        self.postMessage({\n          action: 'videoSegmentTimingInfo',\n          videoSegmentTimingInfo: videoSegmentTimingInfo\n        });\n      });\n    };\n    /**\n     * All incoming messages route through this hash. If no function exists\n     * to handle an incoming message, then we ignore the message.\n     *\n     * @class MessageHandlers\n     * @param {Object} options the options to initialize with\n     */\n\n\n    var MessageHandlers = function () {\n      function MessageHandlers(self, options) {\n        classCallCheck(this, MessageHandlers);\n        this.options = options || {};\n        this.self = self;\n        this.init();\n      }\n      /**\n       * initialize our web worker and wire all the events.\n       */\n\n\n      createClass(MessageHandlers, [{\n        key: 'init',\n        value: function init() {\n          if (this.transmuxer) {\n            this.transmuxer.dispose();\n          }\n\n          this.transmuxer = new transmuxer.Transmuxer(this.options);\n          wireTransmuxerEvents(this.self, this.transmuxer);\n        }\n        /**\n         * Adds data (a ts segment) to the start of the transmuxer pipeline for\n         * processing.\n         *\n         * @param {ArrayBuffer} data data to push into the muxer\n         */\n\n      }, {\n        key: 'push',\n        value: function push(data) {\n          // Cast array buffer to correct type for transmuxer\n          var segment = new Uint8Array(data.data, data.byteOffset, data.byteLength);\n          this.transmuxer.push(segment);\n        }\n        /**\n         * Recreate the transmuxer so that the next segment added via `push`\n         * start with a fresh transmuxer.\n         */\n\n      }, {\n        key: 'reset',\n        value: function reset() {\n          this.init();\n        }\n        /**\n         * Set the value that will be used as the `baseMediaDecodeTime` time for the\n         * next segment pushed in. Subsequent segments will have their `baseMediaDecodeTime`\n         * set relative to the first based on the PTS values.\n         *\n         * @param {Object} data used to set the timestamp offset in the muxer\n         */\n\n      }, {\n        key: 'setTimestampOffset',\n        value: function setTimestampOffset(data) {\n          var timestampOffset = data.timestampOffset || 0;\n          this.transmuxer.setBaseMediaDecodeTime(Math.round(timestampOffset * 90000));\n        }\n      }, {\n        key: 'setAudioAppendStart',\n        value: function setAudioAppendStart(data) {\n          this.transmuxer.setAudioAppendStart(Math.ceil(data.appendStart * 90000));\n        }\n        /**\n         * Forces the pipeline to finish processing the last segment and emit it's\n         * results.\n         *\n         * @param {Object} data event data, not really used\n         */\n\n      }, {\n        key: 'flush',\n        value: function flush(data) {\n          this.transmuxer.flush();\n        }\n      }, {\n        key: 'resetCaptions',\n        value: function resetCaptions() {\n          this.transmuxer.resetCaptions();\n        }\n      }, {\n        key: 'alignGopsWith',\n        value: function alignGopsWith(data) {\n          this.transmuxer.alignGopsWith(data.gopsToAlignWith.slice());\n        }\n      }]);\n      return MessageHandlers;\n    }();\n    /**\n     * Our web wroker interface so that things can talk to mux.js\n     * that will be running in a web worker. the scope is passed to this by\n     * webworkify.\n     *\n     * @param {Object} self the scope for the web worker\n     */\n\n\n    var TransmuxerWorker = function TransmuxerWorker(self) {\n      self.onmessage = function (event) {\n        if (event.data.action === 'init' && event.data.options) {\n          this.messageHandlers = new MessageHandlers(self, event.data.options);\n          return;\n        }\n\n        if (!this.messageHandlers) {\n          this.messageHandlers = new MessageHandlers(self);\n        }\n\n        if (event.data && event.data.action && event.data.action !== 'init') {\n          if (this.messageHandlers[event.data.action]) {\n            this.messageHandlers[event.data.action](event.data);\n          }\n        }\n      };\n    };\n\n    var transmuxerWorker = new TransmuxerWorker(self);\n    return transmuxerWorker;\n  }();\n});\n/**\n * @file - codecs.js - Handles tasks regarding codec strings such as translating them to\n * codec strings, or translating codec strings into objects that can be examined.\n */\n// Default codec parameters if none were provided for video and/or audio\n\nvar defaultCodecs = {\n  videoCodec: 'avc1',\n  videoObjectTypeIndicator: '.4d400d',\n  // AAC-LC\n  audioProfile: '2'\n};\n/**\n * Replace the old apple-style `avc1.<dd>.<dd>` codec string with the standard\n * `avc1.<hhhhhh>`\n *\n * @param {Array} codecs an array of codec strings to fix\n * @return {Array} the translated codec array\n * @private\n */\n\nvar translateLegacyCodecs = function translateLegacyCodecs(codecs) {\n  return codecs.map(function (codec) {\n    return codec.replace(/avc1\\.(\\d+)\\.(\\d+)/i, function (orig, profile, avcLevel) {\n      var profileHex = ('00' + Number(profile).toString(16)).slice(-2);\n      var avcLevelHex = ('00' + Number(avcLevel).toString(16)).slice(-2);\n      return 'avc1.' + profileHex + '00' + avcLevelHex;\n    });\n  });\n};\n/**\n * Parses a codec string to retrieve the number of codecs specified,\n * the video codec and object type indicator, and the audio profile.\n */\n\n\nvar parseCodecs = function parseCodecs() {\n  var codecs = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : '';\n  var result = {\n    codecCount: 0\n  };\n  var parsed = void 0;\n  result.codecCount = codecs.split(',').length;\n  result.codecCount = result.codecCount || 2; // parse the video codec\n\n  parsed = /(^|\\s|,)+(avc[13])([^ ,]*)/i.exec(codecs);\n\n  if (parsed) {\n    result.videoCodec = parsed[2];\n    result.videoObjectTypeIndicator = parsed[3];\n  } // parse the last field of the audio codec\n\n\n  result.audioProfile = /(^|\\s|,)+mp4a.[0-9A-Fa-f]+\\.([0-9A-Fa-f]+)/i.exec(codecs);\n  result.audioProfile = result.audioProfile && result.audioProfile[2];\n  return result;\n};\n/**\n * Replace codecs in the codec string with the old apple-style `avc1.<dd>.<dd>` to the\n * standard `avc1.<hhhhhh>`.\n *\n * @param codecString {String} the codec string\n * @return {String} the codec string with old apple-style codecs replaced\n *\n * @private\n */\n\n\nvar mapLegacyAvcCodecs = function mapLegacyAvcCodecs(codecString) {\n  return codecString.replace(/avc1\\.(\\d+)\\.(\\d+)/i, function (match) {\n    return translateLegacyCodecs([match])[0];\n  });\n};\n/**\n * Build a media mime-type string from a set of parameters\n * @param {String} type either 'audio' or 'video'\n * @param {String} container either 'mp2t' or 'mp4'\n * @param {Array} codecs an array of codec strings to add\n * @return {String} a valid media mime-type\n */\n\n\nvar makeMimeTypeString = function makeMimeTypeString(type, container, codecs) {\n  // The codecs array is filtered so that falsey values are\n  // dropped and don't cause Array#join to create spurious\n  // commas\n  return type + '/' + container + '; codecs=\"' + codecs.filter(function (c) {\n    return !!c;\n  }).join(', ') + '\"';\n};\n/**\n * Returns the type container based on information in the playlist\n * @param {Playlist} media the current media playlist\n * @return {String} a valid media container type\n */\n\n\nvar getContainerType = function getContainerType(media) {\n  // An initialization segment means the media playlist is an iframe\n  // playlist or is using the mp4 container. We don't currently\n  // support iframe playlists, so assume this is signalling mp4\n  // fragments.\n  if (media.segments && media.segments.length && media.segments[0].map) {\n    return 'mp4';\n  }\n\n  return 'mp2t';\n};\n/**\n * Returns a set of codec strings parsed from the playlist or the default\n * codec strings if no codecs were specified in the playlist\n * @param {Playlist} media the current media playlist\n * @return {Object} an object with the video and audio codecs\n */\n\n\nvar getCodecs = function getCodecs(media) {\n  // if the codecs were explicitly specified, use them instead of the\n  // defaults\n  var mediaAttributes = media.attributes || {};\n\n  if (mediaAttributes.CODECS) {\n    return parseCodecs(mediaAttributes.CODECS);\n  }\n\n  return defaultCodecs;\n};\n\nvar audioProfileFromDefault = function audioProfileFromDefault(master, audioGroupId) {\n  if (!master.mediaGroups.AUDIO || !audioGroupId) {\n    return null;\n  }\n\n  var audioGroup = master.mediaGroups.AUDIO[audioGroupId];\n\n  if (!audioGroup) {\n    return null;\n  }\n\n  for (var name in audioGroup) {\n    var audioType = audioGroup[name];\n\n    if (audioType[\"default\"] && audioType.playlists) {\n      // codec should be the same for all playlists within the audio type\n      return parseCodecs(audioType.playlists[0].attributes.CODECS).audioProfile;\n    }\n  }\n\n  return null;\n};\n/**\n * Calculates the MIME type strings for a working configuration of\n * SourceBuffers to play variant streams in a master playlist. If\n * there is no possible working configuration, an empty array will be\n * returned.\n *\n * @param master {Object} the m3u8 object for the master playlist\n * @param media {Object} the m3u8 object for the variant playlist\n * @return {Array} the MIME type strings. If the array has more than\n * one entry, the first element should be applied to the video\n * SourceBuffer and the second to the audio SourceBuffer.\n *\n * @private\n */\n\n\nvar mimeTypesForPlaylist = function mimeTypesForPlaylist(master, media) {\n  var containerType = getContainerType(media);\n  var codecInfo = getCodecs(media);\n  var mediaAttributes = media.attributes || {}; // Default condition for a traditional HLS (no demuxed audio/video)\n\n  var isMuxed = true;\n  var isMaat = false;\n\n  if (!media) {\n    // Not enough information\n    return [];\n  }\n\n  if (master.mediaGroups.AUDIO && mediaAttributes.AUDIO) {\n    var audioGroup = master.mediaGroups.AUDIO[mediaAttributes.AUDIO]; // Handle the case where we are in a multiple-audio track scenario\n\n    if (audioGroup) {\n      isMaat = true; // Start with the everything demuxed then...\n\n      isMuxed = false; // ...check to see if any audio group tracks are muxed (ie. lacking a uri)\n\n      for (var groupId in audioGroup) {\n        // either a uri is present (if the case of HLS and an external playlist), or\n        // playlists is present (in the case of DASH where we don't have external audio\n        // playlists)\n        if (!audioGroup[groupId].uri && !audioGroup[groupId].playlists) {\n          isMuxed = true;\n          break;\n        }\n      }\n    }\n  } // HLS with multiple-audio tracks must always get an audio codec.\n  // Put another way, there is no way to have a video-only multiple-audio HLS!\n\n\n  if (isMaat && !codecInfo.audioProfile) {\n    if (!isMuxed) {\n      // It is possible for codecs to be specified on the audio media group playlist but\n      // not on the rendition playlist. This is mostly the case for DASH, where audio and\n      // video are always separate (and separately specified).\n      codecInfo.audioProfile = audioProfileFromDefault(master, mediaAttributes.AUDIO);\n    }\n\n    if (!codecInfo.audioProfile) {\n      videojs$1.log.warn('Multiple audio tracks present but no audio codec string is specified. ' + 'Attempting to use the default audio codec (mp4a.40.2)');\n      codecInfo.audioProfile = defaultCodecs.audioProfile;\n    }\n  } // Generate the final codec strings from the codec object generated above\n\n\n  var codecStrings = {};\n\n  if (codecInfo.videoCodec) {\n    codecStrings.video = '' + codecInfo.videoCodec + codecInfo.videoObjectTypeIndicator;\n  }\n\n  if (codecInfo.audioProfile) {\n    codecStrings.audio = 'mp4a.40.' + codecInfo.audioProfile;\n  } // Finally, make and return an array with proper mime-types depending on\n  // the configuration\n\n\n  var justAudio = makeMimeTypeString('audio', containerType, [codecStrings.audio]);\n  var justVideo = makeMimeTypeString('video', containerType, [codecStrings.video]);\n  var bothVideoAudio = makeMimeTypeString('video', containerType, [codecStrings.video, codecStrings.audio]);\n\n  if (isMaat) {\n    if (!isMuxed && codecStrings.video) {\n      return [justVideo, justAudio];\n    }\n\n    if (!isMuxed && !codecStrings.video) {\n      // There is no muxed content and no video codec string, so this is an audio only\n      // stream with alternate audio.\n      return [justAudio, justAudio];\n    } // There exists the possiblity that this will return a `video/container`\n    // mime-type for the first entry in the array even when there is only audio.\n    // This doesn't appear to be a problem and simplifies the code.\n\n\n    return [bothVideoAudio, justAudio];\n  } // If there is no video codec at all, always just return a single\n  // audio/<container> mime-type\n\n\n  if (!codecStrings.video) {\n    return [justAudio];\n  } // When not using separate audio media groups, audio and video is\n  // *always* muxed\n\n\n  return [bothVideoAudio];\n};\n/**\n * Parse a content type header into a type and parameters\n * object\n *\n * @param {String} type the content type header\n * @return {Object} the parsed content-type\n * @private\n */\n\n\nvar parseContentType = function parseContentType(type) {\n  var object = {\n    type: '',\n    parameters: {}\n  };\n  var parameters = type.trim().split(';'); // first parameter should always be content-type\n\n  object.type = parameters.shift().trim();\n  parameters.forEach(function (parameter) {\n    var pair = parameter.trim().split('=');\n\n    if (pair.length > 1) {\n      var name = pair[0].replace(/\"/g, '').trim();\n      var value = pair[1].replace(/\"/g, '').trim();\n      object.parameters[name] = value;\n    }\n  });\n  return object;\n};\n/**\n * Check if a codec string refers to an audio codec.\n *\n * @param {String} codec codec string to check\n * @return {Boolean} if this is an audio codec\n * @private\n */\n\n\nvar isAudioCodec = function isAudioCodec(codec) {\n  return /mp4a\\.\\d+.\\d+/i.test(codec);\n};\n/**\n * Check if a codec string refers to a video codec.\n *\n * @param {String} codec codec string to check\n * @return {Boolean} if this is a video codec\n * @private\n */\n\n\nvar isVideoCodec = function isVideoCodec(codec) {\n  return /avc1\\.[\\da-f]+/i.test(codec);\n};\n/**\n * Returns a list of gops in the buffer that have a pts value of 3 seconds or more in\n * front of current time.\n *\n * @param {Array} buffer\n *        The current buffer of gop information\n * @param {Number} currentTime\n *        The current time\n * @param {Double} mapping\n *        Offset to map display time to stream presentation time\n * @return {Array}\n *         List of gops considered safe to append over\n */\n\n\nvar gopsSafeToAlignWith = function gopsSafeToAlignWith(buffer, currentTime, mapping) {\n  if (typeof currentTime === 'undefined' || currentTime === null || !buffer.length) {\n    return [];\n  } // pts value for current time + 3 seconds to give a bit more wiggle room\n\n\n  var currentTimePts = Math.ceil((currentTime - mapping + 3) * 90000);\n  var i = void 0;\n\n  for (i = 0; i < buffer.length; i++) {\n    if (buffer[i].pts > currentTimePts) {\n      break;\n    }\n  }\n\n  return buffer.slice(i);\n};\n/**\n * Appends gop information (timing and byteLength) received by the transmuxer for the\n * gops appended in the last call to appendBuffer\n *\n * @param {Array} buffer\n *        The current buffer of gop information\n * @param {Array} gops\n *        List of new gop information\n * @param {boolean} replace\n *        If true, replace the buffer with the new gop information. If false, append the\n *        new gop information to the buffer in the right location of time.\n * @return {Array}\n *         Updated list of gop information\n */\n\n\nvar updateGopBuffer = function updateGopBuffer(buffer, gops, replace) {\n  if (!gops.length) {\n    return buffer;\n  }\n\n  if (replace) {\n    // If we are in safe append mode, then completely overwrite the gop buffer\n    // with the most recent appeneded data. This will make sure that when appending\n    // future segments, we only try to align with gops that are both ahead of current\n    // time and in the last segment appended.\n    return gops.slice();\n  }\n\n  var start = gops[0].pts;\n  var i = 0;\n\n  for (i; i < buffer.length; i++) {\n    if (buffer[i].pts >= start) {\n      break;\n    }\n  }\n\n  return buffer.slice(0, i).concat(gops);\n};\n/**\n * Removes gop information in buffer that overlaps with provided start and end\n *\n * @param {Array} buffer\n *        The current buffer of gop information\n * @param {Double} start\n *        position to start the remove at\n * @param {Double} end\n *        position to end the remove at\n * @param {Double} mapping\n *        Offset to map display time to stream presentation time\n */\n\n\nvar removeGopBuffer = function removeGopBuffer(buffer, start, end, mapping) {\n  var startPts = Math.ceil((start - mapping) * 90000);\n  var endPts = Math.ceil((end - mapping) * 90000);\n  var updatedBuffer = buffer.slice();\n  var i = buffer.length;\n\n  while (i--) {\n    if (buffer[i].pts <= endPts) {\n      break;\n    }\n  }\n\n  if (i === -1) {\n    // no removal because end of remove range is before start of buffer\n    return updatedBuffer;\n  }\n\n  var j = i + 1;\n\n  while (j--) {\n    if (buffer[j].pts <= startPts) {\n      break;\n    }\n  } // clamp remove range start to 0 index\n\n\n  j = Math.max(j, 0);\n  updatedBuffer.splice(j, i - j + 1);\n  return updatedBuffer;\n};\n\nvar buffered = function buffered(videoBuffer, audioBuffer, audioDisabled) {\n  var start = null;\n  var end = null;\n  var arity = 0;\n  var extents = [];\n  var ranges = []; // neither buffer has been created yet\n\n  if (!videoBuffer && !audioBuffer) {\n    return videojs$1.createTimeRange();\n  } // only one buffer is configured\n\n\n  if (!videoBuffer) {\n    return audioBuffer.buffered;\n  }\n\n  if (!audioBuffer) {\n    return videoBuffer.buffered;\n  } // both buffers are configured\n\n\n  if (audioDisabled) {\n    return videoBuffer.buffered;\n  } // both buffers are empty\n\n\n  if (videoBuffer.buffered.length === 0 && audioBuffer.buffered.length === 0) {\n    return videojs$1.createTimeRange();\n  } // Handle the case where we have both buffers and create an\n  // intersection of the two\n\n\n  var videoBuffered = videoBuffer.buffered;\n  var audioBuffered = audioBuffer.buffered;\n  var count = videoBuffered.length; // A) Gather up all start and end times\n\n  while (count--) {\n    extents.push({\n      time: videoBuffered.start(count),\n      type: 'start'\n    });\n    extents.push({\n      time: videoBuffered.end(count),\n      type: 'end'\n    });\n  }\n\n  count = audioBuffered.length;\n\n  while (count--) {\n    extents.push({\n      time: audioBuffered.start(count),\n      type: 'start'\n    });\n    extents.push({\n      time: audioBuffered.end(count),\n      type: 'end'\n    });\n  } // B) Sort them by time\n\n\n  extents.sort(function (a, b) {\n    return a.time - b.time;\n  }); // C) Go along one by one incrementing arity for start and decrementing\n  //    arity for ends\n\n  for (count = 0; count < extents.length; count++) {\n    if (extents[count].type === 'start') {\n      arity++; // D) If arity is ever incremented to 2 we are entering an\n      //    overlapping range\n\n      if (arity === 2) {\n        start = extents[count].time;\n      }\n    } else if (extents[count].type === 'end') {\n      arity--; // E) If arity is ever decremented to 1 we leaving an\n      //    overlapping range\n\n      if (arity === 1) {\n        end = extents[count].time;\n      }\n    } // F) Record overlapping ranges\n\n\n    if (start !== null && end !== null) {\n      ranges.push([start, end]);\n      start = null;\n      end = null;\n    }\n  }\n\n  return videojs$1.createTimeRanges(ranges);\n};\n/**\n * @file virtual-source-buffer.js\n */\n\n\nvar ONE_SECOND_IN_TS = 90000; // We create a wrapper around the SourceBuffer so that we can manage the\n// state of the `updating` property manually. We have to do this because\n// Firefox changes `updating` to false long before triggering `updateend`\n// events and that was causing strange problems in videojs-contrib-hls\n\nvar makeWrappedSourceBuffer = function makeWrappedSourceBuffer(mediaSource, mimeType) {\n  var sourceBuffer = mediaSource.addSourceBuffer(mimeType);\n  var wrapper = Object.create(null);\n  wrapper.updating = false;\n  wrapper.realBuffer_ = sourceBuffer;\n\n  var _loop = function _loop(key) {\n    if (typeof sourceBuffer[key] === 'function') {\n      wrapper[key] = function () {\n        return sourceBuffer[key].apply(sourceBuffer, arguments);\n      };\n    } else if (typeof wrapper[key] === 'undefined') {\n      Object.defineProperty(wrapper, key, {\n        get: function get$$1() {\n          return sourceBuffer[key];\n        },\n        set: function set$$1(v) {\n          return sourceBuffer[key] = v;\n        }\n      });\n    }\n  };\n\n  for (var key in sourceBuffer) {\n    _loop(key);\n  }\n\n  return wrapper;\n};\n/**\n * VirtualSourceBuffers exist so that we can transmux non native formats\n * into a native format, but keep the same api as a native source buffer.\n * It creates a transmuxer, that works in its own thread (a web worker) and\n * that transmuxer muxes the data into a native format. VirtualSourceBuffer will\n * then send all of that data to the naive sourcebuffer so that it is\n * indestinguishable from a natively supported format.\n *\n * @param {HtmlMediaSource} mediaSource the parent mediaSource\n * @param {Array} codecs array of codecs that we will be dealing with\n * @class VirtualSourceBuffer\n * @extends video.js.EventTarget\n */\n\n\nvar VirtualSourceBuffer = function (_videojs$EventTarget) {\n  inherits(VirtualSourceBuffer, _videojs$EventTarget);\n\n  function VirtualSourceBuffer(mediaSource, codecs) {\n    classCallCheck(this, VirtualSourceBuffer);\n\n    var _this = possibleConstructorReturn(this, (VirtualSourceBuffer.__proto__ || Object.getPrototypeOf(VirtualSourceBuffer)).call(this, videojs$1.EventTarget));\n\n    _this.timestampOffset_ = 0;\n    _this.pendingBuffers_ = [];\n    _this.bufferUpdating_ = false;\n    _this.mediaSource_ = mediaSource;\n    _this.codecs_ = codecs;\n    _this.audioCodec_ = null;\n    _this.videoCodec_ = null;\n    _this.audioDisabled_ = false;\n    _this.appendAudioInitSegment_ = true;\n    _this.gopBuffer_ = [];\n    _this.timeMapping_ = 0;\n    _this.safeAppend_ = videojs$1.browser.IE_VERSION >= 11;\n    var options = {\n      remux: false,\n      alignGopsAtEnd: _this.safeAppend_\n    };\n\n    _this.codecs_.forEach(function (codec) {\n      if (isAudioCodec(codec)) {\n        _this.audioCodec_ = codec;\n      } else if (isVideoCodec(codec)) {\n        _this.videoCodec_ = codec;\n      }\n    }); // append muxed segments to their respective native buffers as\n    // soon as they are available\n\n\n    _this.transmuxer_ = new TransmuxWorker();\n\n    _this.transmuxer_.postMessage({\n      action: 'init',\n      options: options\n    });\n\n    _this.transmuxer_.onmessage = function (event) {\n      if (event.data.action === 'data') {\n        return _this.data_(event);\n      }\n\n      if (event.data.action === 'done') {\n        return _this.done_(event);\n      }\n\n      if (event.data.action === 'gopInfo') {\n        return _this.appendGopInfo_(event);\n      }\n\n      if (event.data.action === 'videoSegmentTimingInfo') {\n        return _this.videoSegmentTimingInfo_(event.data.videoSegmentTimingInfo);\n      }\n    }; // this timestampOffset is a property with the side-effect of resetting\n    // baseMediaDecodeTime in the transmuxer on the setter\n\n\n    Object.defineProperty(_this, 'timestampOffset', {\n      get: function get$$1() {\n        return this.timestampOffset_;\n      },\n      set: function set$$1(val) {\n        if (typeof val === 'number' && val >= 0) {\n          this.timestampOffset_ = val;\n          this.appendAudioInitSegment_ = true; // reset gop buffer on timestampoffset as this signals a change in timeline\n\n          this.gopBuffer_.length = 0;\n          this.timeMapping_ = 0; // We have to tell the transmuxer to set the baseMediaDecodeTime to\n          // the desired timestampOffset for the next segment\n\n          this.transmuxer_.postMessage({\n            action: 'setTimestampOffset',\n            timestampOffset: val\n          });\n        }\n      }\n    }); // setting the append window affects both source buffers\n\n    Object.defineProperty(_this, 'appendWindowStart', {\n      get: function get$$1() {\n        return (this.videoBuffer_ || this.audioBuffer_).appendWindowStart;\n      },\n      set: function set$$1(start) {\n        if (this.videoBuffer_) {\n          this.videoBuffer_.appendWindowStart = start;\n        }\n\n        if (this.audioBuffer_) {\n          this.audioBuffer_.appendWindowStart = start;\n        }\n      }\n    }); // this buffer is \"updating\" if either of its native buffers are\n\n    Object.defineProperty(_this, 'updating', {\n      get: function get$$1() {\n        return !!(this.bufferUpdating_ || !this.audioDisabled_ && this.audioBuffer_ && this.audioBuffer_.updating || this.videoBuffer_ && this.videoBuffer_.updating);\n      }\n    }); // the buffered property is the intersection of the buffered\n    // ranges of the native source buffers\n\n    Object.defineProperty(_this, 'buffered', {\n      get: function get$$1() {\n        return buffered(this.videoBuffer_, this.audioBuffer_, this.audioDisabled_);\n      }\n    });\n    return _this;\n  }\n  /**\n   * When we get a data event from the transmuxer\n   * we call this function and handle the data that\n   * was sent to us\n   *\n   * @private\n   * @param {Event} event the data event from the transmuxer\n   */\n\n\n  createClass(VirtualSourceBuffer, [{\n    key: 'data_',\n    value: function data_(event) {\n      var segment = event.data.segment; // Cast ArrayBuffer to TypedArray\n\n      segment.data = new Uint8Array(segment.data, event.data.byteOffset, event.data.byteLength);\n      segment.initSegment = new Uint8Array(segment.initSegment.data, segment.initSegment.byteOffset, segment.initSegment.byteLength);\n      createTextTracksIfNecessary(this, this.mediaSource_, segment); // Add the segments to the pendingBuffers array\n\n      this.pendingBuffers_.push(segment);\n      return;\n    }\n    /**\n     * When we get a done event from the transmuxer\n     * we call this function and we process all\n     * of the pending data that we have been saving in the\n     * data_ function\n     *\n     * @private\n     * @param {Event} event the done event from the transmuxer\n     */\n\n  }, {\n    key: 'done_',\n    value: function done_(event) {\n      // Don't process and append data if the mediaSource is closed\n      if (this.mediaSource_.readyState === 'closed') {\n        this.pendingBuffers_.length = 0;\n        return;\n      } // All buffers should have been flushed from the muxer\n      // start processing anything we have received\n\n\n      this.processPendingSegments_();\n      return;\n    }\n  }, {\n    key: 'videoSegmentTimingInfo_',\n    value: function videoSegmentTimingInfo_(timingInfo) {\n      var timingInfoInSeconds = {\n        start: {\n          decode: timingInfo.start.dts / ONE_SECOND_IN_TS,\n          presentation: timingInfo.start.pts / ONE_SECOND_IN_TS\n        },\n        end: {\n          decode: timingInfo.end.dts / ONE_SECOND_IN_TS,\n          presentation: timingInfo.end.pts / ONE_SECOND_IN_TS\n        },\n        baseMediaDecodeTime: timingInfo.baseMediaDecodeTime / ONE_SECOND_IN_TS\n      };\n\n      if (timingInfo.prependedContentDuration) {\n        timingInfoInSeconds.prependedContentDuration = timingInfo.prependedContentDuration / ONE_SECOND_IN_TS;\n      }\n\n      this.trigger({\n        type: 'videoSegmentTimingInfo',\n        videoSegmentTimingInfo: timingInfoInSeconds\n      });\n    }\n    /**\n     * Create our internal native audio/video source buffers and add\n     * event handlers to them with the following conditions:\n     * 1. they do not already exist on the mediaSource\n     * 2. this VSB has a codec for them\n     *\n     * @private\n     */\n\n  }, {\n    key: 'createRealSourceBuffers_',\n    value: function createRealSourceBuffers_() {\n      var _this2 = this;\n\n      var types = ['audio', 'video'];\n      types.forEach(function (type) {\n        // Don't create a SourceBuffer of this type if we don't have a\n        // codec for it\n        if (!_this2[type + 'Codec_']) {\n          return;\n        } // Do nothing if a SourceBuffer of this type already exists\n\n\n        if (_this2[type + 'Buffer_']) {\n          return;\n        }\n\n        var buffer = null; // If the mediasource already has a SourceBuffer for the codec\n        // use that\n\n        if (_this2.mediaSource_[type + 'Buffer_']) {\n          buffer = _this2.mediaSource_[type + 'Buffer_']; // In multiple audio track cases, the audio source buffer is disabled\n          // on the main VirtualSourceBuffer by the HTMLMediaSource much earlier\n          // than createRealSourceBuffers_ is called to create the second\n          // VirtualSourceBuffer because that happens as a side-effect of\n          // videojs-contrib-hls starting the audioSegmentLoader. As a result,\n          // the audioBuffer is essentially \"ownerless\" and no one will toggle\n          // the `updating` state back to false once the `updateend` event is received\n          //\n          // Setting `updating` to false manually will work around this\n          // situation and allow work to continue\n\n          buffer.updating = false;\n        } else {\n          var codecProperty = type + 'Codec_';\n          var mimeType = type + '/mp4;codecs=\"' + _this2[codecProperty] + '\"';\n          buffer = makeWrappedSourceBuffer(_this2.mediaSource_.nativeMediaSource_, mimeType);\n          _this2.mediaSource_[type + 'Buffer_'] = buffer;\n        }\n\n        _this2[type + 'Buffer_'] = buffer; // Wire up the events to the SourceBuffer\n\n        ['update', 'updatestart', 'updateend'].forEach(function (event) {\n          buffer.addEventListener(event, function () {\n            // if audio is disabled\n            if (type === 'audio' && _this2.audioDisabled_) {\n              return;\n            }\n\n            if (event === 'updateend') {\n              _this2[type + 'Buffer_'].updating = false;\n            }\n\n            var shouldTrigger = types.every(function (t) {\n              // skip checking audio's updating status if audio\n              // is not enabled\n              if (t === 'audio' && _this2.audioDisabled_) {\n                return true;\n              } // if the other type is updating we don't trigger\n\n\n              if (type !== t && _this2[t + 'Buffer_'] && _this2[t + 'Buffer_'].updating) {\n                return false;\n              }\n\n              return true;\n            });\n\n            if (shouldTrigger) {\n              return _this2.trigger(event);\n            }\n          });\n        });\n      });\n    }\n    /**\n     * Emulate the native mediasource function, but our function will\n     * send all of the proposed segments to the transmuxer so that we\n     * can transmux them before we append them to our internal\n     * native source buffers in the correct format.\n     *\n     * @link https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/appendBuffer\n     * @param {Uint8Array} segment the segment to append to the buffer\n     */\n\n  }, {\n    key: 'appendBuffer',\n    value: function appendBuffer(segment) {\n      // Start the internal \"updating\" state\n      this.bufferUpdating_ = true;\n\n      if (this.audioBuffer_ && this.audioBuffer_.buffered.length) {\n        var audioBuffered = this.audioBuffer_.buffered;\n        this.transmuxer_.postMessage({\n          action: 'setAudioAppendStart',\n          appendStart: audioBuffered.end(audioBuffered.length - 1)\n        });\n      }\n\n      if (this.videoBuffer_) {\n        this.transmuxer_.postMessage({\n          action: 'alignGopsWith',\n          gopsToAlignWith: gopsSafeToAlignWith(this.gopBuffer_, this.mediaSource_.player_ ? this.mediaSource_.player_.currentTime() : null, this.timeMapping_)\n        });\n      }\n\n      this.transmuxer_.postMessage({\n        action: 'push',\n        // Send the typed-array of data as an ArrayBuffer so that\n        // it can be sent as a \"Transferable\" and avoid the costly\n        // memory copy\n        data: segment.buffer,\n        // To recreate the original typed-array, we need information\n        // about what portion of the ArrayBuffer it was a view into\n        byteOffset: segment.byteOffset,\n        byteLength: segment.byteLength\n      }, [segment.buffer]);\n      this.transmuxer_.postMessage({\n        action: 'flush'\n      });\n    }\n    /**\n     * Appends gop information (timing and byteLength) received by the transmuxer for the\n     * gops appended in the last call to appendBuffer\n     *\n     * @param {Event} event\n     *        The gopInfo event from the transmuxer\n     * @param {Array} event.data.gopInfo\n     *        List of gop info to append\n     */\n\n  }, {\n    key: 'appendGopInfo_',\n    value: function appendGopInfo_(event) {\n      this.gopBuffer_ = updateGopBuffer(this.gopBuffer_, event.data.gopInfo, this.safeAppend_);\n    }\n    /**\n     * Emulate the native mediasource function and remove parts\n     * of the buffer from any of our internal buffers that exist\n     *\n     * @link https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/remove\n     * @param {Double} start position to start the remove at\n     * @param {Double} end position to end the remove at\n     */\n\n  }, {\n    key: 'remove',\n    value: function remove(start, end) {\n      if (this.videoBuffer_) {\n        this.videoBuffer_.updating = true;\n        this.videoBuffer_.remove(start, end);\n        this.gopBuffer_ = removeGopBuffer(this.gopBuffer_, start, end, this.timeMapping_);\n      }\n\n      if (!this.audioDisabled_ && this.audioBuffer_) {\n        this.audioBuffer_.updating = true;\n        this.audioBuffer_.remove(start, end);\n      } // Remove Metadata Cues (id3)\n\n\n      removeCuesFromTrack(start, end, this.metadataTrack_); // Remove Any Captions\n\n      if (this.inbandTextTracks_) {\n        for (var track in this.inbandTextTracks_) {\n          removeCuesFromTrack(start, end, this.inbandTextTracks_[track]);\n        }\n      }\n    }\n    /**\n     * Process any segments that the muxer has output\n     * Concatenate segments together based on type and append them into\n     * their respective sourceBuffers\n     *\n     * @private\n     */\n\n  }, {\n    key: 'processPendingSegments_',\n    value: function processPendingSegments_() {\n      var sortedSegments = {\n        video: {\n          segments: [],\n          bytes: 0\n        },\n        audio: {\n          segments: [],\n          bytes: 0\n        },\n        captions: [],\n        metadata: []\n      };\n\n      if (!this.pendingBuffers_.length) {\n        // We are no longer in the internal \"updating\" state\n        this.trigger('updateend');\n        this.bufferUpdating_ = false;\n        return;\n      } // Sort segments into separate video/audio arrays and\n      // keep track of their total byte lengths\n\n\n      sortedSegments = this.pendingBuffers_.reduce(function (segmentObj, segment) {\n        var type = segment.type;\n        var data = segment.data;\n        var initSegment = segment.initSegment;\n        segmentObj[type].segments.push(data);\n        segmentObj[type].bytes += data.byteLength;\n        segmentObj[type].initSegment = initSegment; // Gather any captions into a single array\n\n        if (segment.captions) {\n          segmentObj.captions = segmentObj.captions.concat(segment.captions);\n        }\n\n        if (segment.info) {\n          segmentObj[type].info = segment.info;\n        } // Gather any metadata into a single array\n\n\n        if (segment.metadata) {\n          segmentObj.metadata = segmentObj.metadata.concat(segment.metadata);\n        }\n\n        return segmentObj;\n      }, sortedSegments); // Create the real source buffers if they don't exist by now since we\n      // finally are sure what tracks are contained in the source\n\n      if (!this.videoBuffer_ && !this.audioBuffer_) {\n        // Remove any codecs that may have been specified by default but\n        // are no longer applicable now\n        if (sortedSegments.video.bytes === 0) {\n          this.videoCodec_ = null;\n        }\n\n        if (sortedSegments.audio.bytes === 0) {\n          this.audioCodec_ = null;\n        }\n\n        this.createRealSourceBuffers_();\n      }\n\n      if (sortedSegments.audio.info) {\n        this.mediaSource_.trigger({\n          type: 'audioinfo',\n          info: sortedSegments.audio.info\n        });\n      }\n\n      if (sortedSegments.video.info) {\n        this.mediaSource_.trigger({\n          type: 'videoinfo',\n          info: sortedSegments.video.info\n        });\n      }\n\n      if (this.appendAudioInitSegment_) {\n        if (!this.audioDisabled_ && this.audioBuffer_) {\n          sortedSegments.audio.segments.unshift(sortedSegments.audio.initSegment);\n          sortedSegments.audio.bytes += sortedSegments.audio.initSegment.byteLength;\n        }\n\n        this.appendAudioInitSegment_ = false;\n      }\n\n      var triggerUpdateend = false; // Merge multiple video and audio segments into one and append\n\n      if (this.videoBuffer_ && sortedSegments.video.bytes) {\n        sortedSegments.video.segments.unshift(sortedSegments.video.initSegment);\n        sortedSegments.video.bytes += sortedSegments.video.initSegment.byteLength;\n        this.concatAndAppendSegments_(sortedSegments.video, this.videoBuffer_);\n      } else if (this.videoBuffer_ && (this.audioDisabled_ || !this.audioBuffer_)) {\n        // The transmuxer did not return any bytes of video, meaning it was all trimmed\n        // for gop alignment. Since we have a video buffer and audio is disabled, updateend\n        // will never be triggered by this source buffer, which will cause contrib-hls\n        // to be stuck forever waiting for updateend. If audio is not disabled, updateend\n        // will be triggered by the audio buffer, which will be sent upwards since the video\n        // buffer will not be in an updating state.\n        triggerUpdateend = true;\n      } // Add text-track data for all\n\n\n      addTextTrackData(this, sortedSegments.captions, sortedSegments.metadata);\n\n      if (!this.audioDisabled_ && this.audioBuffer_) {\n        this.concatAndAppendSegments_(sortedSegments.audio, this.audioBuffer_);\n      }\n\n      this.pendingBuffers_.length = 0;\n\n      if (triggerUpdateend) {\n        this.trigger('updateend');\n      } // We are no longer in the internal \"updating\" state\n\n\n      this.bufferUpdating_ = false;\n    }\n    /**\n     * Combine all segments into a single Uint8Array and then append them\n     * to the destination buffer\n     *\n     * @param {Object} segmentObj\n     * @param {SourceBuffer} destinationBuffer native source buffer to append data to\n     * @private\n     */\n\n  }, {\n    key: 'concatAndAppendSegments_',\n    value: function concatAndAppendSegments_(segmentObj, destinationBuffer) {\n      var offset = 0;\n      var tempBuffer = void 0;\n\n      if (segmentObj.bytes) {\n        tempBuffer = new Uint8Array(segmentObj.bytes); // Combine the individual segments into one large typed-array\n\n        segmentObj.segments.forEach(function (segment) {\n          tempBuffer.set(segment, offset);\n          offset += segment.byteLength;\n        });\n\n        try {\n          destinationBuffer.updating = true;\n          destinationBuffer.appendBuffer(tempBuffer);\n        } catch (error) {\n          if (this.mediaSource_.player_) {\n            this.mediaSource_.player_.error({\n              code: -3,\n              type: 'APPEND_BUFFER_ERR',\n              message: error.message,\n              originalError: error\n            });\n          }\n        }\n      }\n    }\n    /**\n     * Emulate the native mediasource function. abort any soureBuffer\n     * actions and throw out any un-appended data.\n     *\n     * @link https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/abort\n     */\n\n  }, {\n    key: 'abort',\n    value: function abort() {\n      if (this.videoBuffer_) {\n        this.videoBuffer_.abort();\n      }\n\n      if (!this.audioDisabled_ && this.audioBuffer_) {\n        this.audioBuffer_.abort();\n      }\n\n      if (this.transmuxer_) {\n        this.transmuxer_.postMessage({\n          action: 'reset'\n        });\n      }\n\n      this.pendingBuffers_.length = 0;\n      this.bufferUpdating_ = false;\n    }\n  }]);\n  return VirtualSourceBuffer;\n}(videojs$1.EventTarget);\n/**\n * @file html-media-source.js\n */\n\n/**\n * Our MediaSource implementation in HTML, mimics native\n * MediaSource where/if possible.\n *\n * @link https://developer.mozilla.org/en-US/docs/Web/API/MediaSource\n * @class HtmlMediaSource\n * @extends videojs.EventTarget\n */\n\n\nvar HtmlMediaSource = function (_videojs$EventTarget) {\n  inherits(HtmlMediaSource, _videojs$EventTarget);\n\n  function HtmlMediaSource() {\n    classCallCheck(this, HtmlMediaSource);\n\n    var _this = possibleConstructorReturn(this, (HtmlMediaSource.__proto__ || Object.getPrototypeOf(HtmlMediaSource)).call(this));\n\n    var property = void 0;\n    _this.nativeMediaSource_ = new window$1.MediaSource(); // delegate to the native MediaSource's methods by default\n\n    for (property in _this.nativeMediaSource_) {\n      if (!(property in HtmlMediaSource.prototype) && typeof _this.nativeMediaSource_[property] === 'function') {\n        _this[property] = _this.nativeMediaSource_[property].bind(_this.nativeMediaSource_);\n      }\n    } // emulate `duration` and `seekable` until seeking can be\n    // handled uniformly for live streams\n    // see https://github.com/w3c/media-source/issues/5\n\n\n    _this.duration_ = NaN;\n    Object.defineProperty(_this, 'duration', {\n      get: function get$$1() {\n        if (this.duration_ === Infinity) {\n          return this.duration_;\n        }\n\n        return this.nativeMediaSource_.duration;\n      },\n      set: function set$$1(duration) {\n        this.duration_ = duration;\n\n        if (duration !== Infinity) {\n          this.nativeMediaSource_.duration = duration;\n          return;\n        }\n      }\n    });\n    Object.defineProperty(_this, 'seekable', {\n      get: function get$$1() {\n        if (this.duration_ === Infinity) {\n          return videojs$1.createTimeRanges([[0, this.nativeMediaSource_.duration]]);\n        }\n\n        return this.nativeMediaSource_.seekable;\n      }\n    });\n    Object.defineProperty(_this, 'readyState', {\n      get: function get$$1() {\n        return this.nativeMediaSource_.readyState;\n      }\n    });\n    Object.defineProperty(_this, 'activeSourceBuffers', {\n      get: function get$$1() {\n        return this.activeSourceBuffers_;\n      }\n    }); // the list of virtual and native SourceBuffers created by this\n    // MediaSource\n\n    _this.sourceBuffers = [];\n    _this.activeSourceBuffers_ = [];\n    /**\n     * update the list of active source buffers based upon various\n     * imformation from HLS and video.js\n     *\n     * @private\n     */\n\n    _this.updateActiveSourceBuffers_ = function () {\n      // Retain the reference but empty the array\n      _this.activeSourceBuffers_.length = 0; // If there is only one source buffer, then it will always be active and audio will\n      // be disabled based on the codec of the source buffer\n\n      if (_this.sourceBuffers.length === 1) {\n        var sourceBuffer = _this.sourceBuffers[0];\n        sourceBuffer.appendAudioInitSegment_ = true;\n        sourceBuffer.audioDisabled_ = !sourceBuffer.audioCodec_;\n\n        _this.activeSourceBuffers_.push(sourceBuffer);\n\n        return;\n      } // There are 2 source buffers, a combined (possibly video only) source buffer and\n      // and an audio only source buffer.\n      // By default, the audio in the combined virtual source buffer is enabled\n      // and the audio-only source buffer (if it exists) is disabled.\n\n\n      var disableCombined = false;\n      var disableAudioOnly = true; // TODO: maybe we can store the sourcebuffers on the track objects?\n      // safari may do something like this\n\n      for (var i = 0; i < _this.player_.audioTracks().length; i++) {\n        var track = _this.player_.audioTracks()[i];\n\n        if (track.enabled && track.kind !== 'main') {\n          // The enabled track is an alternate audio track so disable the audio in\n          // the combined source buffer and enable the audio-only source buffer.\n          disableCombined = true;\n          disableAudioOnly = false;\n          break;\n        }\n      }\n\n      _this.sourceBuffers.forEach(function (sourceBuffer, index) {\n        /* eslinst-disable */\n        // TODO once codecs are required, we can switch to using the codecs to determine\n        //      what stream is the video stream, rather than relying on videoTracks\n\n        /* eslinst-enable */\n        sourceBuffer.appendAudioInitSegment_ = true;\n\n        if (sourceBuffer.videoCodec_ && sourceBuffer.audioCodec_) {\n          // combined\n          sourceBuffer.audioDisabled_ = disableCombined;\n        } else if (sourceBuffer.videoCodec_ && !sourceBuffer.audioCodec_) {\n          // If the \"combined\" source buffer is video only, then we do not want\n          // disable the audio-only source buffer (this is mostly for demuxed\n          // audio and video hls)\n          sourceBuffer.audioDisabled_ = true;\n          disableAudioOnly = false;\n        } else if (!sourceBuffer.videoCodec_ && sourceBuffer.audioCodec_) {\n          // audio only\n          // In the case of audio only with alternate audio and disableAudioOnly is true\n          // this means we want to disable the audio on the alternate audio sourcebuffer\n          // but not the main \"combined\" source buffer. The \"combined\" source buffer is\n          // always at index 0, so this ensures audio won't be disabled in both source\n          // buffers.\n          sourceBuffer.audioDisabled_ = index ? disableAudioOnly : !disableAudioOnly;\n\n          if (sourceBuffer.audioDisabled_) {\n            return;\n          }\n        }\n\n        _this.activeSourceBuffers_.push(sourceBuffer);\n      });\n    };\n\n    _this.onPlayerMediachange_ = function () {\n      _this.sourceBuffers.forEach(function (sourceBuffer) {\n        sourceBuffer.appendAudioInitSegment_ = true;\n      });\n    };\n\n    _this.onHlsReset_ = function () {\n      _this.sourceBuffers.forEach(function (sourceBuffer) {\n        if (sourceBuffer.transmuxer_) {\n          sourceBuffer.transmuxer_.postMessage({\n            action: 'resetCaptions'\n          });\n        }\n      });\n    };\n\n    _this.onHlsSegmentTimeMapping_ = function (event) {\n      _this.sourceBuffers.forEach(function (buffer) {\n        return buffer.timeMapping_ = event.mapping;\n      });\n    }; // Re-emit MediaSource events on the polyfill\n\n\n    ['sourceopen', 'sourceclose', 'sourceended'].forEach(function (eventName) {\n      this.nativeMediaSource_.addEventListener(eventName, this.trigger.bind(this));\n    }, _this); // capture the associated player when the MediaSource is\n    // successfully attached\n\n    _this.on('sourceopen', function (event) {\n      // Get the player this MediaSource is attached to\n      var video = document.querySelector('[src=\"' + _this.url_ + '\"]');\n\n      if (!video) {\n        return;\n      }\n\n      _this.player_ = videojs$1(video.parentNode);\n\n      if (!_this.player_) {\n        return;\n      } // hls-reset is fired by videojs.Hls on to the tech after the main SegmentLoader\n      // resets its state and flushes the buffer\n\n\n      _this.player_.tech_.on('hls-reset', _this.onHlsReset_); // hls-segment-time-mapping is fired by videojs.Hls on to the tech after the main\n      // SegmentLoader inspects an MTS segment and has an accurate stream to display\n      // time mapping\n\n\n      _this.player_.tech_.on('hls-segment-time-mapping', _this.onHlsSegmentTimeMapping_);\n\n      if (_this.player_.audioTracks && _this.player_.audioTracks()) {\n        _this.player_.audioTracks().on('change', _this.updateActiveSourceBuffers_);\n\n        _this.player_.audioTracks().on('addtrack', _this.updateActiveSourceBuffers_);\n\n        _this.player_.audioTracks().on('removetrack', _this.updateActiveSourceBuffers_);\n      }\n\n      _this.player_.on('mediachange', _this.onPlayerMediachange_);\n    });\n\n    _this.on('sourceended', function (event) {\n      var duration = durationOfVideo(_this.duration);\n\n      for (var i = 0; i < _this.sourceBuffers.length; i++) {\n        var sourcebuffer = _this.sourceBuffers[i];\n        var cues = sourcebuffer.metadataTrack_ && sourcebuffer.metadataTrack_.cues;\n\n        if (cues && cues.length) {\n          cues[cues.length - 1].endTime = duration;\n        }\n      }\n    }); // explicitly terminate any WebWorkers that were created\n    // by SourceHandlers\n\n\n    _this.on('sourceclose', function (event) {\n      this.sourceBuffers.forEach(function (sourceBuffer) {\n        if (sourceBuffer.transmuxer_) {\n          sourceBuffer.transmuxer_.terminate();\n        }\n      });\n      this.sourceBuffers.length = 0;\n\n      if (!this.player_) {\n        return;\n      }\n\n      if (this.player_.audioTracks && this.player_.audioTracks()) {\n        this.player_.audioTracks().off('change', this.updateActiveSourceBuffers_);\n        this.player_.audioTracks().off('addtrack', this.updateActiveSourceBuffers_);\n        this.player_.audioTracks().off('removetrack', this.updateActiveSourceBuffers_);\n      } // We can only change this if the player hasn't been disposed of yet\n      // because `off` eventually tries to use the el_ property. If it has\n      // been disposed of, then don't worry about it because there are no\n      // event handlers left to unbind anyway\n\n\n      if (this.player_.el_) {\n        this.player_.off('mediachange', this.onPlayerMediachange_);\n      }\n\n      if (this.player_.tech_ && this.player_.tech_.el_) {\n        this.player_.tech_.off('hls-reset', this.onHlsReset_);\n        this.player_.tech_.off('hls-segment-time-mapping', this.onHlsSegmentTimeMapping_);\n      }\n    });\n\n    return _this;\n  }\n  /**\n   * Add a range that that can now be seeked to.\n   *\n   * @param {Double} start where to start the addition\n   * @param {Double} end where to end the addition\n   * @private\n   */\n\n\n  createClass(HtmlMediaSource, [{\n    key: 'addSeekableRange_',\n    value: function addSeekableRange_(start, end) {\n      var error = void 0;\n\n      if (this.duration !== Infinity) {\n        error = new Error('MediaSource.addSeekableRange() can only be invoked ' + 'when the duration is Infinity');\n        error.name = 'InvalidStateError';\n        error.code = 11;\n        throw error;\n      }\n\n      if (end > this.nativeMediaSource_.duration || isNaN(this.nativeMediaSource_.duration)) {\n        this.nativeMediaSource_.duration = end;\n      }\n    }\n    /**\n     * Add a source buffer to the media source.\n     *\n     * @link https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/addSourceBuffer\n     * @param {String} type the content-type of the content\n     * @return {Object} the created source buffer\n     */\n\n  }, {\n    key: 'addSourceBuffer',\n    value: function addSourceBuffer(type) {\n      var buffer = void 0;\n      var parsedType = parseContentType(type); // Create a VirtualSourceBuffer to transmux MPEG-2 transport\n      // stream segments into fragmented MP4s\n\n      if (/^(video|audio)\\/mp2t$/i.test(parsedType.type)) {\n        var codecs = [];\n\n        if (parsedType.parameters && parsedType.parameters.codecs) {\n          codecs = parsedType.parameters.codecs.split(',');\n          codecs = translateLegacyCodecs(codecs);\n          codecs = codecs.filter(function (codec) {\n            return isAudioCodec(codec) || isVideoCodec(codec);\n          });\n        }\n\n        if (codecs.length === 0) {\n          codecs = ['avc1.4d400d', 'mp4a.40.2'];\n        }\n\n        buffer = new VirtualSourceBuffer(this, codecs);\n\n        if (this.sourceBuffers.length !== 0) {\n          // If another VirtualSourceBuffer already exists, then we are creating a\n          // SourceBuffer for an alternate audio track and therefore we know that\n          // the source has both an audio and video track.\n          // That means we should trigger the manual creation of the real\n          // SourceBuffers instead of waiting for the transmuxer to return data\n          this.sourceBuffers[0].createRealSourceBuffers_();\n          buffer.createRealSourceBuffers_(); // Automatically disable the audio on the first source buffer if\n          // a second source buffer is ever created\n\n          this.sourceBuffers[0].audioDisabled_ = true;\n        }\n      } else {\n        // delegate to the native implementation\n        buffer = this.nativeMediaSource_.addSourceBuffer(type);\n      }\n\n      this.sourceBuffers.push(buffer);\n      return buffer;\n    }\n  }]);\n  return HtmlMediaSource;\n}(videojs$1.EventTarget);\n/**\n * @file videojs-contrib-media-sources.js\n */\n\n\nvar urlCount = 0; // ------------\n// Media Source\n// ------------\n// store references to the media sources so they can be connected\n// to a video element (a swf object)\n// TODO: can we store this somewhere local to this module?\n\nvideojs$1.mediaSources = {};\n/**\n * Provide a method for a swf object to notify JS that a\n * media source is now open.\n *\n * @param {String} msObjectURL string referencing the MSE Object URL\n * @param {String} swfId the swf id\n */\n\nvar open = function open(msObjectURL, swfId) {\n  var mediaSource = videojs$1.mediaSources[msObjectURL];\n\n  if (mediaSource) {\n    mediaSource.trigger({\n      type: 'sourceopen',\n      swfId: swfId\n    });\n  } else {\n    throw new Error('Media Source not found (Video.js)');\n  }\n};\n/**\n * Check to see if the native MediaSource object exists and supports\n * an MP4 container with both H.264 video and AAC-LC audio.\n *\n * @return {Boolean} if  native media sources are supported\n */\n\n\nvar supportsNativeMediaSources = function supportsNativeMediaSources() {\n  return !!window$1.MediaSource && !!window$1.MediaSource.isTypeSupported && window$1.MediaSource.isTypeSupported('video/mp4;codecs=\"avc1.4d400d,mp4a.40.2\"');\n};\n/**\n * An emulation of the MediaSource API so that we can support\n * native and non-native functionality. returns an instance of\n * HtmlMediaSource.\n *\n * @link https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/MediaSource\n */\n\n\nvar MediaSource = function MediaSource() {\n  this.MediaSource = {\n    open: open,\n    supportsNativeMediaSources: supportsNativeMediaSources\n  };\n\n  if (supportsNativeMediaSources()) {\n    return new HtmlMediaSource();\n  }\n\n  throw new Error('Cannot use create a virtual MediaSource for this video');\n};\n\nMediaSource.open = open;\nMediaSource.supportsNativeMediaSources = supportsNativeMediaSources;\n/**\n * A wrapper around the native URL for our MSE object\n * implementation, this object is exposed under videojs.URL\n *\n * @link https://developer.mozilla.org/en-US/docs/Web/API/URL/URL\n */\n\nvar URL$1 = {\n  /**\n   * A wrapper around the native createObjectURL for our objects.\n   * This function maps a native or emulated mediaSource to a blob\n   * url so that it can be loaded into video.js\n   *\n   * @link https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL\n   * @param {MediaSource} object the object to create a blob url to\n   */\n  createObjectURL: function createObjectURL(object) {\n    var objectUrlPrefix = 'blob:vjs-media-source/';\n    var url = void 0; // use the native MediaSource to generate an object URL\n\n    if (object instanceof HtmlMediaSource) {\n      url = window$1.URL.createObjectURL(object.nativeMediaSource_);\n      object.url_ = url;\n      return url;\n    } // if the object isn't an emulated MediaSource, delegate to the\n    // native implementation\n\n\n    if (!(object instanceof HtmlMediaSource)) {\n      url = window$1.URL.createObjectURL(object);\n      object.url_ = url;\n      return url;\n    } // build a URL that can be used to map back to the emulated\n    // MediaSource\n\n\n    url = objectUrlPrefix + urlCount;\n    urlCount++; // setup the mapping back to object\n\n    videojs$1.mediaSources[url] = object;\n    return url;\n  }\n};\nvideojs$1.MediaSource = MediaSource;\nvideojs$1.URL = URL$1;\nvar EventTarget$1$1 = videojs$1.EventTarget,\n    mergeOptions$2 = videojs$1.mergeOptions;\n/**\n * Returns a new master manifest that is the result of merging an updated master manifest\n * into the original version.\n *\n * @param {Object} oldMaster\n *        The old parsed mpd object\n * @param {Object} newMaster\n *        The updated parsed mpd object\n * @return {Object}\n *         A new object representing the original master manifest with the updated media\n *         playlists merged in\n */\n\nvar updateMaster$1 = function updateMaster$$1(oldMaster, newMaster) {\n  var noChanges = void 0;\n  var update = mergeOptions$2(oldMaster, {\n    // These are top level properties that can be updated\n    duration: newMaster.duration,\n    minimumUpdatePeriod: newMaster.minimumUpdatePeriod\n  }); // First update the playlists in playlist list\n\n  for (var i = 0; i < newMaster.playlists.length; i++) {\n    var playlistUpdate = updateMaster(update, newMaster.playlists[i]);\n\n    if (playlistUpdate) {\n      update = playlistUpdate;\n    } else {\n      noChanges = true;\n    }\n  } // Then update media group playlists\n\n\n  forEachMediaGroup(newMaster, function (properties, type, group, label) {\n    if (properties.playlists && properties.playlists.length) {\n      var uri = properties.playlists[0].uri;\n\n      var _playlistUpdate = updateMaster(update, properties.playlists[0]);\n\n      if (_playlistUpdate) {\n        update = _playlistUpdate; // update the playlist reference within media groups\n\n        update.mediaGroups[type][group][label].playlists[0] = update.playlists[uri];\n        noChanges = false;\n      }\n    }\n  });\n\n  if (noChanges) {\n    return null;\n  }\n\n  return update;\n};\n\nvar generateSidxKey = function generateSidxKey(sidxInfo) {\n  // should be non-inclusive\n  var sidxByteRangeEnd = sidxInfo.byterange.offset + sidxInfo.byterange.length - 1;\n  return sidxInfo.uri + '-' + sidxInfo.byterange.offset + '-' + sidxByteRangeEnd;\n}; // SIDX should be equivalent if the URI and byteranges of the SIDX match.\n// If the SIDXs have maps, the two maps should match,\n// both `a` and `b` missing SIDXs is considered matching.\n// If `a` or `b` but not both have a map, they aren't matching.\n\n\nvar equivalentSidx = function equivalentSidx(a, b) {\n  var neitherMap = Boolean(!a.map && !b.map);\n  var equivalentMap = neitherMap || Boolean(a.map && b.map && a.map.byterange.offset === b.map.byterange.offset && a.map.byterange.length === b.map.byterange.length);\n  return equivalentMap && a.uri === b.uri && a.byterange.offset === b.byterange.offset && a.byterange.length === b.byterange.length;\n}; // exported for testing\n\n\nvar compareSidxEntry = function compareSidxEntry(playlists, oldSidxMapping) {\n  var newSidxMapping = {};\n\n  for (var uri in playlists) {\n    var playlist = playlists[uri];\n    var currentSidxInfo = playlist.sidx;\n\n    if (currentSidxInfo) {\n      var key = generateSidxKey(currentSidxInfo);\n\n      if (!oldSidxMapping[key]) {\n        break;\n      }\n\n      var savedSidxInfo = oldSidxMapping[key].sidxInfo;\n\n      if (equivalentSidx(savedSidxInfo, currentSidxInfo)) {\n        newSidxMapping[key] = oldSidxMapping[key];\n      }\n    }\n  }\n\n  return newSidxMapping;\n};\n/**\n *  A function that filters out changed items as they need to be requested separately.\n *\n *  The method is exported for testing\n *\n *  @param {Object} masterXml the mpd XML\n *  @param {string} srcUrl the mpd url\n *  @param {Date} clientOffset a time difference between server and client (passed through and not used)\n *  @param {Object} oldSidxMapping the SIDX to compare against\n */\n\n\nvar filterChangedSidxMappings = function filterChangedSidxMappings(masterXml, srcUrl, clientOffset, oldSidxMapping) {\n  // Don't pass current sidx mapping\n  var master = parse(masterXml, {\n    manifestUri: srcUrl,\n    clientOffset: clientOffset\n  });\n  var videoSidx = compareSidxEntry(master.playlists, oldSidxMapping);\n  var mediaGroupSidx = videoSidx;\n  forEachMediaGroup(master, function (properties, mediaType, groupKey, labelKey) {\n    if (properties.playlists && properties.playlists.length) {\n      var playlists = properties.playlists;\n      mediaGroupSidx = mergeOptions$2(mediaGroupSidx, compareSidxEntry(playlists, oldSidxMapping));\n    }\n  });\n  return mediaGroupSidx;\n}; // exported for testing\n\n\nvar requestSidx_ = function requestSidx_(sidxRange, playlist, xhr, options, finishProcessingFn) {\n  var sidxInfo = {\n    // resolve the segment URL relative to the playlist\n    uri: resolveManifestRedirect(options.handleManifestRedirects, sidxRange.resolvedUri),\n    // resolvedUri: sidxRange.resolvedUri,\n    byterange: sidxRange.byterange,\n    // the segment's playlist\n    playlist: playlist\n  };\n  var sidxRequestOptions = videojs$1.mergeOptions(sidxInfo, {\n    responseType: 'arraybuffer',\n    headers: segmentXhrHeaders(sidxInfo)\n  });\n  return xhr(sidxRequestOptions, finishProcessingFn);\n};\n\nvar DashPlaylistLoader = function (_EventTarget) {\n  inherits(DashPlaylistLoader, _EventTarget); // DashPlaylistLoader must accept either a src url or a playlist because subsequent\n  // playlist loader setups from media groups will expect to be able to pass a playlist\n  // (since there aren't external URLs to media playlists with DASH)\n\n  function DashPlaylistLoader(srcUrlOrPlaylist, hls) {\n    var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};\n    var masterPlaylistLoader = arguments[3];\n    classCallCheck(this, DashPlaylistLoader);\n\n    var _this = possibleConstructorReturn(this, (DashPlaylistLoader.__proto__ || Object.getPrototypeOf(DashPlaylistLoader)).call(this));\n\n    var _options$withCredenti = options.withCredentials,\n        withCredentials = _options$withCredenti === undefined ? false : _options$withCredenti,\n        _options$handleManife = options.handleManifestRedirects,\n        handleManifestRedirects = _options$handleManife === undefined ? false : _options$handleManife;\n    _this.hls_ = hls;\n    _this.withCredentials = withCredentials;\n    _this.handleManifestRedirects = handleManifestRedirects;\n\n    if (!srcUrlOrPlaylist) {\n      throw new Error('A non-empty playlist URL or playlist is required');\n    } // event naming?\n\n\n    _this.on('minimumUpdatePeriod', function () {\n      _this.refreshXml_();\n    }); // live playlist staleness timeout\n\n\n    _this.on('mediaupdatetimeout', function () {\n      _this.refreshMedia_(_this.media().uri);\n    });\n\n    _this.state = 'HAVE_NOTHING';\n    _this.loadedPlaylists_ = {}; // initialize the loader state\n    // The masterPlaylistLoader will be created with a string\n\n    if (typeof srcUrlOrPlaylist === 'string') {\n      _this.srcUrl = srcUrlOrPlaylist; // TODO: reset sidxMapping between period changes\n      // once multi-period is refactored\n\n      _this.sidxMapping_ = {};\n      return possibleConstructorReturn(_this);\n    }\n\n    _this.setupChildLoader(masterPlaylistLoader, srcUrlOrPlaylist);\n\n    return _this;\n  }\n\n  createClass(DashPlaylistLoader, [{\n    key: 'setupChildLoader',\n    value: function setupChildLoader(masterPlaylistLoader, playlist) {\n      this.masterPlaylistLoader_ = masterPlaylistLoader;\n      this.childPlaylist_ = playlist;\n    }\n  }, {\n    key: 'dispose',\n    value: function dispose() {\n      this.stopRequest();\n      this.loadedPlaylists_ = {};\n      window$1.clearTimeout(this.minimumUpdatePeriodTimeout_);\n      window$1.clearTimeout(this.mediaRequest_);\n      window$1.clearTimeout(this.mediaUpdateTimeout);\n    }\n  }, {\n    key: 'hasPendingRequest',\n    value: function hasPendingRequest() {\n      return this.request || this.mediaRequest_;\n    }\n  }, {\n    key: 'stopRequest',\n    value: function stopRequest() {\n      if (this.request) {\n        var oldRequest = this.request;\n        this.request = null;\n        oldRequest.onreadystatechange = null;\n        oldRequest.abort();\n      }\n    }\n  }, {\n    key: 'sidxRequestFinished_',\n    value: function sidxRequestFinished_(playlist, master, startingState, doneFn) {\n      var _this2 = this;\n\n      return function (err, request) {\n        // disposed\n        if (!_this2.request) {\n          return;\n        } // pending request is cleared\n\n\n        _this2.request = null;\n\n        if (err) {\n          _this2.error = {\n            status: request.status,\n            message: 'DASH playlist request error at URL: ' + playlist.uri,\n            response: request.response,\n            // MEDIA_ERR_NETWORK\n            code: 2\n          };\n\n          if (startingState) {\n            _this2.state = startingState;\n          }\n\n          _this2.trigger('error');\n\n          return doneFn(master, null);\n        }\n\n        var bytes = new Uint8Array(request.response);\n        var sidx = mp4Inspector.parseSidx(bytes.subarray(8));\n        return doneFn(master, sidx);\n      };\n    }\n  }, {\n    key: 'media',\n    value: function media(playlist) {\n      var _this3 = this; // getter\n\n\n      if (!playlist) {\n        return this.media_;\n      } // setter\n\n\n      if (this.state === 'HAVE_NOTHING') {\n        throw new Error('Cannot switch media playlist from ' + this.state);\n      }\n\n      var startingState = this.state; // find the playlist object if the target playlist has been specified by URI\n\n      if (typeof playlist === 'string') {\n        if (!this.master.playlists[playlist]) {\n          throw new Error('Unknown playlist URI: ' + playlist);\n        }\n\n        playlist = this.master.playlists[playlist];\n      }\n\n      var mediaChange = !this.media_ || playlist.uri !== this.media_.uri; // switch to previously loaded playlists immediately\n\n      if (mediaChange && this.loadedPlaylists_[playlist.uri] && this.loadedPlaylists_[playlist.uri].endList) {\n        this.state = 'HAVE_METADATA';\n        this.media_ = playlist; // trigger media change if the active media has been updated\n\n        if (mediaChange) {\n          this.trigger('mediachanging');\n          this.trigger('mediachange');\n        }\n\n        return;\n      } // switching to the active playlist is a no-op\n\n\n      if (!mediaChange) {\n        return;\n      } // switching from an already loaded playlist\n\n\n      if (this.media_) {\n        this.trigger('mediachanging');\n      }\n\n      if (!playlist.sidx) {\n        // Continue asynchronously if there is no sidx\n        // wait one tick to allow haveMaster to run first on a child loader\n        this.mediaRequest_ = window$1.setTimeout(this.haveMetadata.bind(this, {\n          startingState: startingState,\n          playlist: playlist\n        }), 0); // exit early and don't do sidx work\n\n        return;\n      } // we have sidx mappings\n\n\n      var oldMaster = void 0;\n      var sidxMapping = void 0; // sidxMapping is used when parsing the masterXml, so store\n      // it on the masterPlaylistLoader\n\n      if (this.masterPlaylistLoader_) {\n        oldMaster = this.masterPlaylistLoader_.master;\n        sidxMapping = this.masterPlaylistLoader_.sidxMapping_;\n      } else {\n        oldMaster = this.master;\n        sidxMapping = this.sidxMapping_;\n      }\n\n      var sidxKey = generateSidxKey(playlist.sidx);\n      sidxMapping[sidxKey] = {\n        sidxInfo: playlist.sidx\n      };\n      this.request = requestSidx_(playlist.sidx, playlist, this.hls_.xhr, {\n        handleManifestRedirects: this.handleManifestRedirects\n      }, this.sidxRequestFinished_(playlist, oldMaster, startingState, function (newMaster, sidx) {\n        if (!newMaster || !sidx) {\n          throw new Error('failed to request sidx');\n        } // update loader's sidxMapping with parsed sidx box\n\n\n        sidxMapping[sidxKey].sidx = sidx; // everything is ready just continue to haveMetadata\n\n        _this3.haveMetadata({\n          startingState: startingState,\n          playlist: newMaster.playlists[playlist.uri]\n        });\n      }));\n    }\n  }, {\n    key: 'haveMetadata',\n    value: function haveMetadata(_ref) {\n      var startingState = _ref.startingState,\n          playlist = _ref.playlist;\n      this.state = 'HAVE_METADATA';\n      this.loadedPlaylists_[playlist.uri] = playlist;\n      this.mediaRequest_ = null; // This will trigger loadedplaylist\n\n      this.refreshMedia_(playlist.uri); // fire loadedmetadata the first time a media playlist is loaded\n      // to resolve setup of media groups\n\n      if (startingState === 'HAVE_MASTER') {\n        this.trigger('loadedmetadata');\n      } else {\n        // trigger media change if the active media has been updated\n        this.trigger('mediachange');\n      }\n    }\n  }, {\n    key: 'pause',\n    value: function pause() {\n      this.stopRequest();\n      window$1.clearTimeout(this.mediaUpdateTimeout);\n      window$1.clearTimeout(this.minimumUpdatePeriodTimeout_);\n\n      if (this.state === 'HAVE_NOTHING') {\n        // If we pause the loader before any data has been retrieved, its as if we never\n        // started, so reset to an unstarted state.\n        this.started = false;\n      }\n    }\n  }, {\n    key: 'load',\n    value: function load(isFinalRendition) {\n      var _this4 = this;\n\n      window$1.clearTimeout(this.mediaUpdateTimeout);\n      window$1.clearTimeout(this.minimumUpdatePeriodTimeout_);\n      var media = this.media();\n\n      if (isFinalRendition) {\n        var delay = media ? media.targetDuration / 2 * 1000 : 5 * 1000;\n        this.mediaUpdateTimeout = window$1.setTimeout(function () {\n          return _this4.load();\n        }, delay);\n        return;\n      } // because the playlists are internal to the manifest, load should either load the\n      // main manifest, or do nothing but trigger an event\n\n\n      if (!this.started) {\n        this.start();\n        return;\n      }\n\n      this.trigger('loadedplaylist');\n    }\n    /**\n     * Parses the master xml string and updates playlist uri references\n     *\n     * @return {Object}\n     *         The parsed mpd manifest object\n     */\n\n  }, {\n    key: 'parseMasterXml',\n    value: function parseMasterXml() {\n      var master = parse(this.masterXml_, {\n        manifestUri: this.srcUrl,\n        clientOffset: this.clientOffset_,\n        sidxMapping: this.sidxMapping_\n      });\n      master.uri = this.srcUrl; // Set up phony URIs for the playlists since we won't have external URIs for DASH\n      // but reference playlists by their URI throughout the project\n      // TODO: Should we create the dummy uris in mpd-parser as well (leaning towards yes).\n\n      for (var i = 0; i < master.playlists.length; i++) {\n        var phonyUri = 'placeholder-uri-' + i;\n        master.playlists[i].uri = phonyUri; // set up by URI references\n\n        master.playlists[phonyUri] = master.playlists[i];\n      } // set up phony URIs for the media group playlists since we won't have external\n      // URIs for DASH but reference playlists by their URI throughout the project\n\n\n      forEachMediaGroup(master, function (properties, mediaType, groupKey, labelKey) {\n        if (properties.playlists && properties.playlists.length) {\n          var _phonyUri = 'placeholder-uri-' + mediaType + '-' + groupKey + '-' + labelKey;\n\n          properties.playlists[0].uri = _phonyUri; // setup URI references\n\n          master.playlists[_phonyUri] = properties.playlists[0];\n        }\n      });\n      setupMediaPlaylists(master);\n      resolveMediaGroupUris(master);\n      return master;\n    }\n  }, {\n    key: 'start',\n    value: function start() {\n      var _this5 = this;\n\n      this.started = true; // We don't need to request the master manifest again\n      // Call this asynchronously to match the xhr request behavior below\n\n      if (this.masterPlaylistLoader_) {\n        this.mediaRequest_ = window$1.setTimeout(this.haveMaster_.bind(this), 0);\n        return;\n      } // request the specified URL\n\n\n      this.request = this.hls_.xhr({\n        uri: this.srcUrl,\n        withCredentials: this.withCredentials\n      }, function (error, req) {\n        // disposed\n        if (!_this5.request) {\n          return;\n        } // clear the loader's request reference\n\n\n        _this5.request = null;\n\n        if (error) {\n          _this5.error = {\n            status: req.status,\n            message: 'DASH playlist request error at URL: ' + _this5.srcUrl,\n            responseText: req.responseText,\n            // MEDIA_ERR_NETWORK\n            code: 2\n          };\n\n          if (_this5.state === 'HAVE_NOTHING') {\n            _this5.started = false;\n          }\n\n          return _this5.trigger('error');\n        }\n\n        _this5.masterXml_ = req.responseText;\n\n        if (req.responseHeaders && req.responseHeaders.date) {\n          _this5.masterLoaded_ = Date.parse(req.responseHeaders.date);\n        } else {\n          _this5.masterLoaded_ = Date.now();\n        }\n\n        _this5.srcUrl = resolveManifestRedirect(_this5.handleManifestRedirects, _this5.srcUrl, req);\n\n        _this5.syncClientServerClock_(_this5.onClientServerClockSync_.bind(_this5));\n      });\n    }\n    /**\n     * Parses the master xml for UTCTiming node to sync the client clock to the server\n     * clock. If the UTCTiming node requires a HEAD or GET request, that request is made.\n     *\n     * @param {Function} done\n     *        Function to call when clock sync has completed\n     */\n\n  }, {\n    key: 'syncClientServerClock_',\n    value: function syncClientServerClock_(done) {\n      var _this6 = this;\n\n      var utcTiming = parseUTCTiming(this.masterXml_); // No UTCTiming element found in the mpd. Use Date header from mpd request as the\n      // server clock\n\n      if (utcTiming === null) {\n        this.clientOffset_ = this.masterLoaded_ - Date.now();\n        return done();\n      }\n\n      if (utcTiming.method === 'DIRECT') {\n        this.clientOffset_ = utcTiming.value - Date.now();\n        return done();\n      }\n\n      this.request = this.hls_.xhr({\n        uri: resolveUrl(this.srcUrl, utcTiming.value),\n        method: utcTiming.method,\n        withCredentials: this.withCredentials\n      }, function (error, req) {\n        // disposed\n        if (!_this6.request) {\n          return;\n        }\n\n        if (error) {\n          // sync request failed, fall back to using date header from mpd\n          // TODO: log warning\n          _this6.clientOffset_ = _this6.masterLoaded_ - Date.now();\n          return done();\n        }\n\n        var serverTime = void 0;\n\n        if (utcTiming.method === 'HEAD') {\n          if (!req.responseHeaders || !req.responseHeaders.date) {\n            // expected date header not preset, fall back to using date header from mpd\n            // TODO: log warning\n            serverTime = _this6.masterLoaded_;\n          } else {\n            serverTime = Date.parse(req.responseHeaders.date);\n          }\n        } else {\n          serverTime = Date.parse(req.responseText);\n        }\n\n        _this6.clientOffset_ = serverTime - Date.now();\n        done();\n      });\n    }\n  }, {\n    key: 'haveMaster_',\n    value: function haveMaster_() {\n      this.state = 'HAVE_MASTER'; // clear media request\n\n      this.mediaRequest_ = null;\n\n      if (!this.masterPlaylistLoader_) {\n        this.master = this.parseMasterXml(); // We have the master playlist at this point, so\n        // trigger this to allow MasterPlaylistController\n        // to make an initial playlist selection\n\n        this.trigger('loadedplaylist');\n      } else if (!this.media_) {\n        // no media playlist was specifically selected so select\n        // the one the child playlist loader was created with\n        this.media(this.childPlaylist_);\n      }\n    }\n    /**\n     * Handler for after client/server clock synchronization has happened. Sets up\n     * xml refresh timer if specificed by the manifest.\n     */\n\n  }, {\n    key: 'onClientServerClockSync_',\n    value: function onClientServerClockSync_() {\n      var _this7 = this;\n\n      this.haveMaster_();\n\n      if (!this.hasPendingRequest() && !this.media_) {\n        this.media(this.master.playlists[0]);\n      } // TODO: minimumUpdatePeriod can have a value of 0. Currently the manifest will not\n      // be refreshed when this is the case. The inter-op guide says that when the\n      // minimumUpdatePeriod is 0, the manifest should outline all currently available\n      // segments, but future segments may require an update. I think a good solution\n      // would be to update the manifest at the same rate that the media playlists\n      // are \"refreshed\", i.e. every targetDuration.\n\n\n      if (this.master && this.master.minimumUpdatePeriod) {\n        this.minimumUpdatePeriodTimeout_ = window$1.setTimeout(function () {\n          _this7.trigger('minimumUpdatePeriod');\n        }, this.master.minimumUpdatePeriod);\n      }\n    }\n    /**\n     * Sends request to refresh the master xml and updates the parsed master manifest\n     * TODO: Does the client offset need to be recalculated when the xml is refreshed?\n     */\n\n  }, {\n    key: 'refreshXml_',\n    value: function refreshXml_() {\n      var _this8 = this; // The srcUrl here *may* need to pass through handleManifestsRedirects when\n      // sidx is implemented\n\n\n      this.request = this.hls_.xhr({\n        uri: this.srcUrl,\n        withCredentials: this.withCredentials\n      }, function (error, req) {\n        // disposed\n        if (!_this8.request) {\n          return;\n        } // clear the loader's request reference\n\n\n        _this8.request = null;\n\n        if (error) {\n          _this8.error = {\n            status: req.status,\n            message: 'DASH playlist request error at URL: ' + _this8.srcUrl,\n            responseText: req.responseText,\n            // MEDIA_ERR_NETWORK\n            code: 2\n          };\n\n          if (_this8.state === 'HAVE_NOTHING') {\n            _this8.started = false;\n          }\n\n          return _this8.trigger('error');\n        }\n\n        _this8.masterXml_ = req.responseText; // This will filter out updated sidx info from the mapping\n\n        _this8.sidxMapping_ = filterChangedSidxMappings(_this8.masterXml_, _this8.srcUrl, _this8.clientOffset_, _this8.sidxMapping_);\n\n        var master = _this8.parseMasterXml();\n\n        var updatedMaster = updateMaster$1(_this8.master, master);\n\n        var currentSidxInfo = _this8.media().sidx;\n\n        if (updatedMaster) {\n          if (currentSidxInfo) {\n            var sidxKey = generateSidxKey(currentSidxInfo); // the sidx was updated, so the previous mapping was removed\n\n            if (!_this8.sidxMapping_[sidxKey]) {\n              var playlist = _this8.media();\n\n              _this8.request = requestSidx_(playlist.sidx, playlist, _this8.hls_.xhr, {\n                handleManifestRedirects: _this8.handleManifestRedirects\n              }, _this8.sidxRequestFinished_(playlist, master, _this8.state, function (newMaster, sidx) {\n                if (!newMaster || !sidx) {\n                  throw new Error('failed to request sidx on minimumUpdatePeriod');\n                } // update loader's sidxMapping with parsed sidx box\n\n\n                _this8.sidxMapping_[sidxKey].sidx = sidx;\n                _this8.minimumUpdatePeriodTimeout_ = window$1.setTimeout(function () {\n                  _this8.trigger('minimumUpdatePeriod');\n                }, _this8.master.minimumUpdatePeriod); // TODO: do we need to reload the current playlist?\n\n                _this8.refreshMedia_(_this8.media().uri);\n\n                return;\n              }));\n            }\n          } else {\n            _this8.master = updatedMaster;\n          }\n        }\n\n        _this8.minimumUpdatePeriodTimeout_ = window$1.setTimeout(function () {\n          _this8.trigger('minimumUpdatePeriod');\n        }, _this8.master.minimumUpdatePeriod);\n      });\n    }\n    /**\n     * Refreshes the media playlist by re-parsing the master xml and updating playlist\n     * references. If this is an alternate loader, the updated parsed manifest is retrieved\n     * from the master loader.\n     */\n\n  }, {\n    key: 'refreshMedia_',\n    value: function refreshMedia_(mediaUri) {\n      var _this9 = this;\n\n      if (!mediaUri) {\n        throw new Error('refreshMedia_ must take a media uri');\n      }\n\n      var oldMaster = void 0;\n      var newMaster = void 0;\n\n      if (this.masterPlaylistLoader_) {\n        oldMaster = this.masterPlaylistLoader_.master;\n        newMaster = this.masterPlaylistLoader_.parseMasterXml();\n      } else {\n        oldMaster = this.master;\n        newMaster = this.parseMasterXml();\n      }\n\n      var updatedMaster = updateMaster$1(oldMaster, newMaster);\n\n      if (updatedMaster) {\n        if (this.masterPlaylistLoader_) {\n          this.masterPlaylistLoader_.master = updatedMaster;\n        } else {\n          this.master = updatedMaster;\n        }\n\n        this.media_ = updatedMaster.playlists[mediaUri];\n      } else {\n        this.media_ = newMaster.playlists[mediaUri];\n        this.trigger('playlistunchanged');\n      }\n\n      if (!this.media().endList) {\n        this.mediaUpdateTimeout = window$1.setTimeout(function () {\n          _this9.trigger('mediaupdatetimeout');\n        }, refreshDelay(this.media(), !!updatedMaster));\n      }\n\n      this.trigger('loadedplaylist');\n    }\n  }]);\n  return DashPlaylistLoader;\n}(EventTarget$1$1);\n\nvar logger = function logger(source) {\n  if (videojs$1.log.debug) {\n    return videojs$1.log.debug.bind(videojs$1, 'VHS:', source + ' >');\n  }\n\n  return function () {};\n};\n\nfunction noop() {}\n/**\n * @file source-updater.js\n */\n\n/**\n * A queue of callbacks to be serialized and applied when a\n * MediaSource and its associated SourceBuffers are not in the\n * updating state. It is used by the segment loader to update the\n * underlying SourceBuffers when new data is loaded, for instance.\n *\n * @class SourceUpdater\n * @param {MediaSource} mediaSource the MediaSource to create the\n * SourceBuffer from\n * @param {String} mimeType the desired MIME type of the underlying\n * SourceBuffer\n * @param {Object} sourceBufferEmitter an event emitter that fires when a source buffer is\n * added to the media source\n */\n\n\nvar SourceUpdater = function () {\n  function SourceUpdater(mediaSource, mimeType, type, sourceBufferEmitter) {\n    classCallCheck(this, SourceUpdater);\n    this.callbacks_ = [];\n    this.pendingCallback_ = null;\n    this.timestampOffset_ = 0;\n    this.mediaSource = mediaSource;\n    this.processedAppend_ = false;\n    this.type_ = type;\n    this.mimeType_ = mimeType;\n    this.logger_ = logger('SourceUpdater[' + type + '][' + mimeType + ']');\n\n    if (mediaSource.readyState === 'closed') {\n      mediaSource.addEventListener('sourceopen', this.createSourceBuffer_.bind(this, mimeType, sourceBufferEmitter));\n    } else {\n      this.createSourceBuffer_(mimeType, sourceBufferEmitter);\n    }\n  }\n\n  createClass(SourceUpdater, [{\n    key: 'createSourceBuffer_',\n    value: function createSourceBuffer_(mimeType, sourceBufferEmitter) {\n      var _this = this;\n\n      this.sourceBuffer_ = this.mediaSource.addSourceBuffer(mimeType);\n      this.logger_('created SourceBuffer');\n\n      if (sourceBufferEmitter) {\n        sourceBufferEmitter.trigger('sourcebufferadded');\n\n        if (this.mediaSource.sourceBuffers.length < 2) {\n          // There's another source buffer we must wait for before we can start updating\n          // our own (or else we can get into a bad state, i.e., appending video/audio data\n          // before the other video/audio source buffer is available and leading to a video\n          // or audio only buffer).\n          sourceBufferEmitter.on('sourcebufferadded', function () {\n            _this.start_();\n          });\n          return;\n        }\n      }\n\n      this.start_();\n    }\n  }, {\n    key: 'start_',\n    value: function start_() {\n      var _this2 = this;\n\n      this.started_ = true; // run completion handlers and process callbacks as updateend\n      // events fire\n\n      this.onUpdateendCallback_ = function () {\n        var pendingCallback = _this2.pendingCallback_;\n        _this2.pendingCallback_ = null;\n        _this2.sourceBuffer_.removing = false;\n\n        _this2.logger_('buffered [' + printableRange(_this2.buffered()) + ']');\n\n        if (pendingCallback) {\n          pendingCallback();\n        }\n\n        _this2.runCallback_();\n      };\n\n      this.sourceBuffer_.addEventListener('updateend', this.onUpdateendCallback_);\n      this.runCallback_();\n    }\n    /**\n     * Aborts the current segment and resets the segment parser.\n     *\n     * @param {Function} done function to call when done\n     * @see http://w3c.github.io/media-source/#widl-SourceBuffer-abort-void\n     */\n\n  }, {\n    key: 'abort',\n    value: function abort(done) {\n      var _this3 = this;\n\n      if (this.processedAppend_) {\n        this.queueCallback_(function () {\n          _this3.sourceBuffer_.abort();\n        }, done);\n      }\n    }\n    /**\n     * Queue an update to append an ArrayBuffer.\n     *\n     * @param {ArrayBuffer} bytes\n     * @param {Function} done the function to call when done\n     * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-appendBuffer-void-ArrayBuffer-data\n     */\n\n  }, {\n    key: 'appendBuffer',\n    value: function appendBuffer(config, done) {\n      var _this4 = this;\n\n      this.processedAppend_ = true;\n      this.queueCallback_(function () {\n        if (config.videoSegmentTimingInfoCallback) {\n          _this4.sourceBuffer_.addEventListener('videoSegmentTimingInfo', config.videoSegmentTimingInfoCallback);\n        }\n\n        _this4.sourceBuffer_.appendBuffer(config.bytes);\n      }, function () {\n        if (config.videoSegmentTimingInfoCallback) {\n          _this4.sourceBuffer_.removeEventListener('videoSegmentTimingInfo', config.videoSegmentTimingInfoCallback);\n        }\n\n        done();\n      });\n    }\n    /**\n     * Indicates what TimeRanges are buffered in the managed SourceBuffer.\n     *\n     * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-buffered\n     */\n\n  }, {\n    key: 'buffered',\n    value: function buffered() {\n      if (!this.sourceBuffer_) {\n        return videojs$1.createTimeRanges();\n      }\n\n      return this.sourceBuffer_.buffered;\n    }\n    /**\n     * Queue an update to remove a time range from the buffer.\n     *\n     * @param {Number} start where to start the removal\n     * @param {Number} end where to end the removal\n     * @param {Function} [done=noop] optional callback to be executed when the remove\n     * operation is complete\n     * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-remove-void-double-start-unrestricted-double-end\n     */\n\n  }, {\n    key: 'remove',\n    value: function remove(start, end) {\n      var _this5 = this;\n\n      var done = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : noop;\n\n      if (this.processedAppend_) {\n        this.queueCallback_(function () {\n          _this5.logger_('remove [' + start + ' => ' + end + ']');\n\n          _this5.sourceBuffer_.removing = true;\n\n          _this5.sourceBuffer_.remove(start, end);\n        }, done);\n      }\n    }\n    /**\n     * Whether the underlying sourceBuffer is updating or not\n     *\n     * @return {Boolean} the updating status of the SourceBuffer\n     */\n\n  }, {\n    key: 'updating',\n    value: function updating() {\n      // we are updating if the sourcebuffer is updating or\n      return !this.sourceBuffer_ || this.sourceBuffer_.updating || // if we have a pending callback that is not our internal noop\n      !!this.pendingCallback_ && this.pendingCallback_ !== noop;\n    }\n    /**\n     * Set/get the timestampoffset on the SourceBuffer\n     *\n     * @return {Number} the timestamp offset\n     */\n\n  }, {\n    key: 'timestampOffset',\n    value: function timestampOffset(offset) {\n      var _this6 = this;\n\n      if (typeof offset !== 'undefined') {\n        this.queueCallback_(function () {\n          _this6.sourceBuffer_.timestampOffset = offset;\n\n          _this6.runCallback_();\n        });\n        this.timestampOffset_ = offset;\n      }\n\n      return this.timestampOffset_;\n    }\n    /**\n     * Queue a callback to run\n     */\n\n  }, {\n    key: 'queueCallback_',\n    value: function queueCallback_(callback, done) {\n      this.callbacks_.push([callback.bind(this), done]);\n      this.runCallback_();\n    }\n    /**\n     * Run a queued callback\n     */\n\n  }, {\n    key: 'runCallback_',\n    value: function runCallback_() {\n      var callbacks = void 0;\n\n      if (!this.updating() && this.callbacks_.length && this.started_) {\n        callbacks = this.callbacks_.shift();\n        this.pendingCallback_ = callbacks[1];\n        callbacks[0]();\n      }\n    }\n    /**\n     * dispose of the source updater and the underlying sourceBuffer\n     */\n\n  }, {\n    key: 'dispose',\n    value: function dispose() {\n      var _this7 = this;\n\n      var disposeFn = function disposeFn() {\n        if (_this7.sourceBuffer_ && _this7.mediaSource.readyState === 'open') {\n          _this7.sourceBuffer_.abort();\n        }\n\n        _this7.sourceBuffer_.removeEventListener('updateend', disposeFn);\n      };\n\n      this.sourceBuffer_.removeEventListener('updateend', this.onUpdateendCallback_);\n\n      if (this.sourceBuffer_.removing) {\n        this.sourceBuffer_.addEventListener('updateend', disposeFn);\n      } else {\n        disposeFn();\n      }\n    }\n  }]);\n  return SourceUpdater;\n}();\n\nvar Config = {\n  GOAL_BUFFER_LENGTH: 30,\n  MAX_GOAL_BUFFER_LENGTH: 60,\n  GOAL_BUFFER_LENGTH_RATE: 1,\n  // 0.5 MB/s\n  INITIAL_BANDWIDTH: 4194304,\n  // A fudge factor to apply to advertised playlist bitrates to account for\n  // temporary flucations in client bandwidth\n  BANDWIDTH_VARIANCE: 1.2,\n  // How much of the buffer must be filled before we consider upswitching\n  BUFFER_LOW_WATER_LINE: 0,\n  MAX_BUFFER_LOW_WATER_LINE: 30,\n  BUFFER_LOW_WATER_LINE_RATE: 1\n};\nvar REQUEST_ERRORS = {\n  FAILURE: 2,\n  TIMEOUT: -101,\n  ABORTED: -102\n};\n/**\n * Abort all requests\n *\n * @param {Object} activeXhrs - an object that tracks all XHR requests\n */\n\nvar abortAll = function abortAll(activeXhrs) {\n  activeXhrs.forEach(function (xhr) {\n    xhr.abort();\n  });\n};\n/**\n * Gather important bandwidth stats once a request has completed\n *\n * @param {Object} request - the XHR request from which to gather stats\n */\n\n\nvar getRequestStats = function getRequestStats(request) {\n  return {\n    bandwidth: request.bandwidth,\n    bytesReceived: request.bytesReceived || 0,\n    roundTripTime: request.roundTripTime || 0\n  };\n};\n/**\n * If possible gather bandwidth stats as a request is in\n * progress\n *\n * @param {Event} progressEvent - an event object from an XHR's progress event\n */\n\n\nvar getProgressStats = function getProgressStats(progressEvent) {\n  var request = progressEvent.target;\n  var roundTripTime = Date.now() - request.requestTime;\n  var stats = {\n    bandwidth: Infinity,\n    bytesReceived: 0,\n    roundTripTime: roundTripTime || 0\n  };\n  stats.bytesReceived = progressEvent.loaded; // This can result in Infinity if stats.roundTripTime is 0 but that is ok\n  // because we should only use bandwidth stats on progress to determine when\n  // abort a request early due to insufficient bandwidth\n\n  stats.bandwidth = Math.floor(stats.bytesReceived / stats.roundTripTime * 8 * 1000);\n  return stats;\n};\n/**\n * Handle all error conditions in one place and return an object\n * with all the information\n *\n * @param {Error|null} error - if non-null signals an error occured with the XHR\n * @param {Object} request -  the XHR request that possibly generated the error\n */\n\n\nvar handleErrors = function handleErrors(error, request) {\n  if (request.timedout) {\n    return {\n      status: request.status,\n      message: 'HLS request timed-out at URL: ' + request.uri,\n      code: REQUEST_ERRORS.TIMEOUT,\n      xhr: request\n    };\n  }\n\n  if (request.aborted) {\n    return {\n      status: request.status,\n      message: 'HLS request aborted at URL: ' + request.uri,\n      code: REQUEST_ERRORS.ABORTED,\n      xhr: request\n    };\n  }\n\n  if (error) {\n    return {\n      status: request.status,\n      message: 'HLS request errored at URL: ' + request.uri,\n      code: REQUEST_ERRORS.FAILURE,\n      xhr: request\n    };\n  }\n\n  return null;\n};\n/**\n * Handle responses for key data and convert the key data to the correct format\n * for the decryption step later\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n *                                        this request\n */\n\n\nvar handleKeyResponse = function handleKeyResponse(segment, finishProcessingFn) {\n  return function (error, request) {\n    var response = request.response;\n    var errorObj = handleErrors(error, request);\n\n    if (errorObj) {\n      return finishProcessingFn(errorObj, segment);\n    }\n\n    if (response.byteLength !== 16) {\n      return finishProcessingFn({\n        status: request.status,\n        message: 'Invalid HLS key at URL: ' + request.uri,\n        code: REQUEST_ERRORS.FAILURE,\n        xhr: request\n      }, segment);\n    }\n\n    var view = new DataView(response);\n    segment.key.bytes = new Uint32Array([view.getUint32(0), view.getUint32(4), view.getUint32(8), view.getUint32(12)]);\n    return finishProcessingFn(null, segment);\n  };\n};\n/**\n * Handle init-segment responses\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n *                                        this request\n */\n\n\nvar handleInitSegmentResponse = function handleInitSegmentResponse(segment, captionParser, finishProcessingFn) {\n  return function (error, request) {\n    var response = request.response;\n    var errorObj = handleErrors(error, request);\n\n    if (errorObj) {\n      return finishProcessingFn(errorObj, segment);\n    } // stop processing if received empty content\n\n\n    if (response.byteLength === 0) {\n      return finishProcessingFn({\n        status: request.status,\n        message: 'Empty HLS segment content at URL: ' + request.uri,\n        code: REQUEST_ERRORS.FAILURE,\n        xhr: request\n      }, segment);\n    }\n\n    segment.map.bytes = new Uint8Array(request.response); // Initialize CaptionParser if it hasn't been yet\n\n    if (captionParser && !captionParser.isInitialized()) {\n      captionParser.init();\n    }\n\n    segment.map.timescales = mp4probe.timescale(segment.map.bytes);\n    segment.map.videoTrackIds = mp4probe.videoTrackIds(segment.map.bytes);\n    return finishProcessingFn(null, segment);\n  };\n};\n/**\n * Response handler for segment-requests being sure to set the correct\n * property depending on whether the segment is encryped or not\n * Also records and keeps track of stats that are used for ABR purposes\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n *                                        this request\n */\n\n\nvar handleSegmentResponse = function handleSegmentResponse(segment, captionParser, finishProcessingFn) {\n  return function (error, request) {\n    var response = request.response;\n    var errorObj = handleErrors(error, request);\n    var parsed = void 0;\n\n    if (errorObj) {\n      return finishProcessingFn(errorObj, segment);\n    } // stop processing if received empty content\n\n\n    if (response.byteLength === 0) {\n      return finishProcessingFn({\n        status: request.status,\n        message: 'Empty HLS segment content at URL: ' + request.uri,\n        code: REQUEST_ERRORS.FAILURE,\n        xhr: request\n      }, segment);\n    }\n\n    segment.stats = getRequestStats(request);\n\n    if (segment.key) {\n      segment.encryptedBytes = new Uint8Array(request.response);\n    } else {\n      segment.bytes = new Uint8Array(request.response);\n    } // This is likely an FMP4 and has the init segment.\n    // Run through the CaptionParser in case there are captions.\n\n\n    if (captionParser && segment.map && segment.map.bytes) {\n      // Initialize CaptionParser if it hasn't been yet\n      if (!captionParser.isInitialized()) {\n        captionParser.init();\n      }\n\n      parsed = captionParser.parse(segment.bytes, segment.map.videoTrackIds, segment.map.timescales);\n\n      if (parsed && parsed.captions) {\n        segment.captionStreams = parsed.captionStreams;\n        segment.fmp4Captions = parsed.captions;\n      }\n    }\n\n    return finishProcessingFn(null, segment);\n  };\n};\n/**\n * Decrypt the segment via the decryption web worker\n *\n * @param {WebWorker} decrypter - a WebWorker interface to AES-128 decryption routines\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} doneFn - a callback that is executed after decryption has completed\n */\n\n\nvar decryptSegment = function decryptSegment(decrypter, segment, doneFn) {\n  var decryptionHandler = function decryptionHandler(event) {\n    if (event.data.source === segment.requestId) {\n      decrypter.removeEventListener('message', decryptionHandler);\n      var decrypted = event.data.decrypted;\n      segment.bytes = new Uint8Array(decrypted.bytes, decrypted.byteOffset, decrypted.byteLength);\n      return doneFn(null, segment);\n    }\n  };\n\n  decrypter.addEventListener('message', decryptionHandler);\n  var keyBytes = void 0;\n\n  if (segment.key.bytes.slice) {\n    keyBytes = segment.key.bytes.slice();\n  } else {\n    keyBytes = new Uint32Array(Array.prototype.slice.call(segment.key.bytes));\n  } // this is an encrypted segment\n  // incrementally decrypt the segment\n\n\n  decrypter.postMessage(createTransferableMessage({\n    source: segment.requestId,\n    encrypted: segment.encryptedBytes,\n    key: keyBytes,\n    iv: segment.key.iv\n  }), [segment.encryptedBytes.buffer, keyBytes.buffer]);\n};\n/**\n * This function waits for all XHRs to finish (with either success or failure)\n * before continueing processing via it's callback. The function gathers errors\n * from each request into a single errors array so that the error status for\n * each request can be examined later.\n *\n * @param {Object} activeXhrs - an object that tracks all XHR requests\n * @param {WebWorker} decrypter - a WebWorker interface to AES-128 decryption routines\n * @param {Function} doneFn - a callback that is executed after all resources have been\n *                            downloaded and any decryption completed\n */\n\n\nvar waitForCompletion = function waitForCompletion(activeXhrs, decrypter, doneFn) {\n  var count = 0;\n  var didError = false;\n  return function (error, segment) {\n    if (didError) {\n      return;\n    }\n\n    if (error) {\n      didError = true; // If there are errors, we have to abort any outstanding requests\n\n      abortAll(activeXhrs); // Even though the requests above are aborted, and in theory we could wait until we\n      // handle the aborted events from those requests, there are some cases where we may\n      // never get an aborted event. For instance, if the network connection is lost and\n      // there were two requests, the first may have triggered an error immediately, while\n      // the second request remains unsent. In that case, the aborted algorithm will not\n      // trigger an abort: see https://xhr.spec.whatwg.org/#the-abort()-method\n      //\n      // We also can't rely on the ready state of the XHR, since the request that\n      // triggered the connection error may also show as a ready state of 0 (unsent).\n      // Therefore, we have to finish this group of requests immediately after the first\n      // seen error.\n\n      return doneFn(error, segment);\n    }\n\n    count += 1;\n\n    if (count === activeXhrs.length) {\n      // Keep track of when *all* of the requests have completed\n      segment.endOfAllRequests = Date.now();\n\n      if (segment.encryptedBytes) {\n        return decryptSegment(decrypter, segment, doneFn);\n      } // Otherwise, everything is ready just continue\n\n\n      return doneFn(null, segment);\n    }\n  };\n};\n/**\n * Simple progress event callback handler that gathers some stats before\n * executing a provided callback with the `segment` object\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} progressFn - a callback that is executed each time a progress event\n *                                is received\n * @param {Event} event - the progress event object from XMLHttpRequest\n */\n\n\nvar handleProgress = function handleProgress(segment, progressFn) {\n  return function (event) {\n    segment.stats = videojs$1.mergeOptions(segment.stats, getProgressStats(event)); // record the time that we receive the first byte of data\n\n    if (!segment.stats.firstBytesReceivedAt && segment.stats.bytesReceived) {\n      segment.stats.firstBytesReceivedAt = Date.now();\n    }\n\n    return progressFn(event, segment);\n  };\n};\n/**\n * Load all resources and does any processing necessary for a media-segment\n *\n * Features:\n *   decrypts the media-segment if it has a key uri and an iv\n *   aborts *all* requests if *any* one request fails\n *\n * The segment object, at minimum, has the following format:\n * {\n *   resolvedUri: String,\n *   [byterange]: {\n *     offset: Number,\n *     length: Number\n *   },\n *   [key]: {\n *     resolvedUri: String\n *     [byterange]: {\n *       offset: Number,\n *       length: Number\n *     },\n *     iv: {\n *       bytes: Uint32Array\n *     }\n *   },\n *   [map]: {\n *     resolvedUri: String,\n *     [byterange]: {\n *       offset: Number,\n *       length: Number\n *     },\n *     [bytes]: Uint8Array\n *   }\n * }\n * ...where [name] denotes optional properties\n *\n * @param {Function} xhr - an instance of the xhr wrapper in xhr.js\n * @param {Object} xhrOptions - the base options to provide to all xhr requests\n * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128\n *                                       decryption routines\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} progressFn - a callback that receives progress events from the main\n *                                segment's xhr request\n * @param {Function} doneFn - a callback that is executed only once all requests have\n *                            succeeded or failed\n * @returns {Function} a function that, when invoked, immediately aborts all\n *                     outstanding requests\n */\n\n\nvar mediaSegmentRequest = function mediaSegmentRequest(xhr, xhrOptions, decryptionWorker, captionParser, segment, progressFn, doneFn) {\n  var activeXhrs = [];\n  var finishProcessingFn = waitForCompletion(activeXhrs, decryptionWorker, doneFn); // optionally, request the decryption key\n\n  if (segment.key && !segment.key.bytes) {\n    var keyRequestOptions = videojs$1.mergeOptions(xhrOptions, {\n      uri: segment.key.resolvedUri,\n      responseType: 'arraybuffer'\n    });\n    var keyRequestCallback = handleKeyResponse(segment, finishProcessingFn);\n    var keyXhr = xhr(keyRequestOptions, keyRequestCallback);\n    activeXhrs.push(keyXhr);\n  } // optionally, request the associated media init segment\n\n\n  if (segment.map && !segment.map.bytes) {\n    var initSegmentOptions = videojs$1.mergeOptions(xhrOptions, {\n      uri: segment.map.resolvedUri,\n      responseType: 'arraybuffer',\n      headers: segmentXhrHeaders(segment.map)\n    });\n    var initSegmentRequestCallback = handleInitSegmentResponse(segment, captionParser, finishProcessingFn);\n    var initSegmentXhr = xhr(initSegmentOptions, initSegmentRequestCallback);\n    activeXhrs.push(initSegmentXhr);\n  }\n\n  var segmentRequestOptions = videojs$1.mergeOptions(xhrOptions, {\n    uri: segment.resolvedUri,\n    responseType: 'arraybuffer',\n    headers: segmentXhrHeaders(segment)\n  });\n  var segmentRequestCallback = handleSegmentResponse(segment, captionParser, finishProcessingFn);\n  var segmentXhr = xhr(segmentRequestOptions, segmentRequestCallback);\n  segmentXhr.addEventListener('progress', handleProgress(segment, progressFn));\n  activeXhrs.push(segmentXhr);\n  return function () {\n    return abortAll(activeXhrs);\n  };\n}; // Utilities\n\n/**\n * Returns the CSS value for the specified property on an element\n * using `getComputedStyle`. Firefox has a long-standing issue where\n * getComputedStyle() may return null when running in an iframe with\n * `display: none`.\n *\n * @see https://bugzilla.mozilla.org/show_bug.cgi?id=548397\n * @param {HTMLElement} el the htmlelement to work on\n * @param {string} the proprety to get the style for\n */\n\n\nvar safeGetComputedStyle = function safeGetComputedStyle(el, property) {\n  var result = void 0;\n\n  if (!el) {\n    return '';\n  }\n\n  result = window$1.getComputedStyle(el);\n\n  if (!result) {\n    return '';\n  }\n\n  return result[property];\n};\n/**\n * Resuable stable sort function\n *\n * @param {Playlists} array\n * @param {Function} sortFn Different comparators\n * @function stableSort\n */\n\n\nvar stableSort = function stableSort(array, sortFn) {\n  var newArray = array.slice();\n  array.sort(function (left, right) {\n    var cmp = sortFn(left, right);\n\n    if (cmp === 0) {\n      return newArray.indexOf(left) - newArray.indexOf(right);\n    }\n\n    return cmp;\n  });\n};\n/**\n * A comparator function to sort two playlist object by bandwidth.\n *\n * @param {Object} left a media playlist object\n * @param {Object} right a media playlist object\n * @return {Number} Greater than zero if the bandwidth attribute of\n * left is greater than the corresponding attribute of right. Less\n * than zero if the bandwidth of right is greater than left and\n * exactly zero if the two are equal.\n */\n\n\nvar comparePlaylistBandwidth = function comparePlaylistBandwidth(left, right) {\n  var leftBandwidth = void 0;\n  var rightBandwidth = void 0;\n\n  if (left.attributes.BANDWIDTH) {\n    leftBandwidth = left.attributes.BANDWIDTH;\n  }\n\n  leftBandwidth = leftBandwidth || window$1.Number.MAX_VALUE;\n\n  if (right.attributes.BANDWIDTH) {\n    rightBandwidth = right.attributes.BANDWIDTH;\n  }\n\n  rightBandwidth = rightBandwidth || window$1.Number.MAX_VALUE;\n  return leftBandwidth - rightBandwidth;\n};\n/**\n * A comparator function to sort two playlist object by resolution (width).\n * @param {Object} left a media playlist object\n * @param {Object} right a media playlist object\n * @return {Number} Greater than zero if the resolution.width attribute of\n * left is greater than the corresponding attribute of right. Less\n * than zero if the resolution.width of right is greater than left and\n * exactly zero if the two are equal.\n */\n\n\nvar comparePlaylistResolution = function comparePlaylistResolution(left, right) {\n  var leftWidth = void 0;\n  var rightWidth = void 0;\n\n  if (left.attributes.RESOLUTION && left.attributes.RESOLUTION.width) {\n    leftWidth = left.attributes.RESOLUTION.width;\n  }\n\n  leftWidth = leftWidth || window$1.Number.MAX_VALUE;\n\n  if (right.attributes.RESOLUTION && right.attributes.RESOLUTION.width) {\n    rightWidth = right.attributes.RESOLUTION.width;\n  }\n\n  rightWidth = rightWidth || window$1.Number.MAX_VALUE; // NOTE - Fallback to bandwidth sort as appropriate in cases where multiple renditions\n  // have the same media dimensions/ resolution\n\n  if (leftWidth === rightWidth && left.attributes.BANDWIDTH && right.attributes.BANDWIDTH) {\n    return left.attributes.BANDWIDTH - right.attributes.BANDWIDTH;\n  }\n\n  return leftWidth - rightWidth;\n};\n/**\n * Chooses the appropriate media playlist based on bandwidth and player size\n *\n * @param {Object} master\n *        Object representation of the master manifest\n * @param {Number} playerBandwidth\n *        Current calculated bandwidth of the player\n * @param {Number} playerWidth\n *        Current width of the player element\n * @param {Number} playerHeight\n *        Current height of the player element\n * @param {Boolean} limitRenditionByPlayerDimensions\n *        True if the player width and height should be used during the selection, false otherwise\n * @return {Playlist} the highest bitrate playlist less than the\n * currently detected bandwidth, accounting for some amount of\n * bandwidth variance\n */\n\n\nvar simpleSelector = function simpleSelector(master, playerBandwidth, playerWidth, playerHeight, limitRenditionByPlayerDimensions) {\n  // convert the playlists to an intermediary representation to make comparisons easier\n  var sortedPlaylistReps = master.playlists.map(function (playlist) {\n    var width = void 0;\n    var height = void 0;\n    var bandwidth = void 0;\n    width = playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.width;\n    height = playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.height;\n    bandwidth = playlist.attributes.BANDWIDTH;\n    bandwidth = bandwidth || window$1.Number.MAX_VALUE;\n    return {\n      bandwidth: bandwidth,\n      width: width,\n      height: height,\n      playlist: playlist\n    };\n  });\n  stableSort(sortedPlaylistReps, function (left, right) {\n    return left.bandwidth - right.bandwidth;\n  }); // filter out any playlists that have been excluded due to\n  // incompatible configurations\n\n  sortedPlaylistReps = sortedPlaylistReps.filter(function (rep) {\n    return !Playlist.isIncompatible(rep.playlist);\n  }); // filter out any playlists that have been disabled manually through the representations\n  // api or blacklisted temporarily due to playback errors.\n\n  var enabledPlaylistReps = sortedPlaylistReps.filter(function (rep) {\n    return Playlist.isEnabled(rep.playlist);\n  });\n\n  if (!enabledPlaylistReps.length) {\n    // if there are no enabled playlists, then they have all been blacklisted or disabled\n    // by the user through the representations api. In this case, ignore blacklisting and\n    // fallback to what the user wants by using playlists the user has not disabled.\n    enabledPlaylistReps = sortedPlaylistReps.filter(function (rep) {\n      return !Playlist.isDisabled(rep.playlist);\n    });\n  } // filter out any variant that has greater effective bitrate\n  // than the current estimated bandwidth\n\n\n  var bandwidthPlaylistReps = enabledPlaylistReps.filter(function (rep) {\n    return rep.bandwidth * Config.BANDWIDTH_VARIANCE < playerBandwidth;\n  });\n  var highestRemainingBandwidthRep = bandwidthPlaylistReps[bandwidthPlaylistReps.length - 1]; // get all of the renditions with the same (highest) bandwidth\n  // and then taking the very first element\n\n  var bandwidthBestRep = bandwidthPlaylistReps.filter(function (rep) {\n    return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;\n  })[0]; // if we're not going to limit renditions by player size, make an early decision.\n\n  if (limitRenditionByPlayerDimensions === false) {\n    var _chosenRep = bandwidthBestRep || enabledPlaylistReps[0] || sortedPlaylistReps[0];\n\n    return _chosenRep ? _chosenRep.playlist : null;\n  } // filter out playlists without resolution information\n\n\n  var haveResolution = bandwidthPlaylistReps.filter(function (rep) {\n    return rep.width && rep.height;\n  }); // sort variants by resolution\n\n  stableSort(haveResolution, function (left, right) {\n    return left.width - right.width;\n  }); // if we have the exact resolution as the player use it\n\n  var resolutionBestRepList = haveResolution.filter(function (rep) {\n    return rep.width === playerWidth && rep.height === playerHeight;\n  });\n  highestRemainingBandwidthRep = resolutionBestRepList[resolutionBestRepList.length - 1]; // ensure that we pick the highest bandwidth variant that have exact resolution\n\n  var resolutionBestRep = resolutionBestRepList.filter(function (rep) {\n    return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;\n  })[0];\n  var resolutionPlusOneList = void 0;\n  var resolutionPlusOneSmallest = void 0;\n  var resolutionPlusOneRep = void 0; // find the smallest variant that is larger than the player\n  // if there is no match of exact resolution\n\n  if (!resolutionBestRep) {\n    resolutionPlusOneList = haveResolution.filter(function (rep) {\n      return rep.width > playerWidth || rep.height > playerHeight;\n    }); // find all the variants have the same smallest resolution\n\n    resolutionPlusOneSmallest = resolutionPlusOneList.filter(function (rep) {\n      return rep.width === resolutionPlusOneList[0].width && rep.height === resolutionPlusOneList[0].height;\n    }); // ensure that we also pick the highest bandwidth variant that\n    // is just-larger-than the video player\n\n    highestRemainingBandwidthRep = resolutionPlusOneSmallest[resolutionPlusOneSmallest.length - 1];\n    resolutionPlusOneRep = resolutionPlusOneSmallest.filter(function (rep) {\n      return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;\n    })[0];\n  } // fallback chain of variants\n\n\n  var chosenRep = resolutionPlusOneRep || resolutionBestRep || bandwidthBestRep || enabledPlaylistReps[0] || sortedPlaylistReps[0];\n  return chosenRep ? chosenRep.playlist : null;\n}; // Playlist Selectors\n\n/**\n * Chooses the appropriate media playlist based on the most recent\n * bandwidth estimate and the player size.\n *\n * Expects to be called within the context of an instance of HlsHandler\n *\n * @return {Playlist} the highest bitrate playlist less than the\n * currently detected bandwidth, accounting for some amount of\n * bandwidth variance\n */\n\n\nvar lastBandwidthSelector = function lastBandwidthSelector() {\n  return simpleSelector(this.playlists.master, this.systemBandwidth, parseInt(safeGetComputedStyle(this.tech_.el(), 'width'), 10), parseInt(safeGetComputedStyle(this.tech_.el(), 'height'), 10), this.limitRenditionByPlayerDimensions);\n};\n/**\n * Chooses the appropriate media playlist based on the potential to rebuffer\n *\n * @param {Object} settings\n *        Object of information required to use this selector\n * @param {Object} settings.master\n *        Object representation of the master manifest\n * @param {Number} settings.currentTime\n *        The current time of the player\n * @param {Number} settings.bandwidth\n *        Current measured bandwidth\n * @param {Number} settings.duration\n *        Duration of the media\n * @param {Number} settings.segmentDuration\n *        Segment duration to be used in round trip time calculations\n * @param {Number} settings.timeUntilRebuffer\n *        Time left in seconds until the player has to rebuffer\n * @param {Number} settings.currentTimeline\n *        The current timeline segments are being loaded from\n * @param {SyncController} settings.syncController\n *        SyncController for determining if we have a sync point for a given playlist\n * @return {Object|null}\n *         {Object} return.playlist\n *         The highest bandwidth playlist with the least amount of rebuffering\n *         {Number} return.rebufferingImpact\n *         The amount of time in seconds switching to this playlist will rebuffer. A\n *         negative value means that switching will cause zero rebuffering.\n */\n\n\nvar minRebufferMaxBandwidthSelector = function minRebufferMaxBandwidthSelector(settings) {\n  var master = settings.master,\n      currentTime = settings.currentTime,\n      bandwidth = settings.bandwidth,\n      duration$$1 = settings.duration,\n      segmentDuration = settings.segmentDuration,\n      timeUntilRebuffer = settings.timeUntilRebuffer,\n      currentTimeline = settings.currentTimeline,\n      syncController = settings.syncController; // filter out any playlists that have been excluded due to\n  // incompatible configurations\n\n  var compatiblePlaylists = master.playlists.filter(function (playlist) {\n    return !Playlist.isIncompatible(playlist);\n  }); // filter out any playlists that have been disabled manually through the representations\n  // api or blacklisted temporarily due to playback errors.\n\n  var enabledPlaylists = compatiblePlaylists.filter(Playlist.isEnabled);\n\n  if (!enabledPlaylists.length) {\n    // if there are no enabled playlists, then they have all been blacklisted or disabled\n    // by the user through the representations api. In this case, ignore blacklisting and\n    // fallback to what the user wants by using playlists the user has not disabled.\n    enabledPlaylists = compatiblePlaylists.filter(function (playlist) {\n      return !Playlist.isDisabled(playlist);\n    });\n  }\n\n  var bandwidthPlaylists = enabledPlaylists.filter(Playlist.hasAttribute.bind(null, 'BANDWIDTH'));\n  var rebufferingEstimates = bandwidthPlaylists.map(function (playlist) {\n    var syncPoint = syncController.getSyncPoint(playlist, duration$$1, currentTimeline, currentTime); // If there is no sync point for this playlist, switching to it will require a\n    // sync request first. This will double the request time\n\n    var numRequests = syncPoint ? 1 : 2;\n    var requestTimeEstimate = Playlist.estimateSegmentRequestTime(segmentDuration, bandwidth, playlist);\n    var rebufferingImpact = requestTimeEstimate * numRequests - timeUntilRebuffer;\n    return {\n      playlist: playlist,\n      rebufferingImpact: rebufferingImpact\n    };\n  });\n  var noRebufferingPlaylists = rebufferingEstimates.filter(function (estimate) {\n    return estimate.rebufferingImpact <= 0;\n  }); // Sort by bandwidth DESC\n\n  stableSort(noRebufferingPlaylists, function (a, b) {\n    return comparePlaylistBandwidth(b.playlist, a.playlist);\n  });\n\n  if (noRebufferingPlaylists.length) {\n    return noRebufferingPlaylists[0];\n  }\n\n  stableSort(rebufferingEstimates, function (a, b) {\n    return a.rebufferingImpact - b.rebufferingImpact;\n  });\n  return rebufferingEstimates[0] || null;\n};\n/**\n * Chooses the appropriate media playlist, which in this case is the lowest bitrate\n * one with video.  If no renditions with video exist, return the lowest audio rendition.\n *\n * Expects to be called within the context of an instance of HlsHandler\n *\n * @return {Object|null}\n *         {Object} return.playlist\n *         The lowest bitrate playlist that contains a video codec.  If no such rendition\n *         exists pick the lowest audio rendition.\n */\n\n\nvar lowestBitrateCompatibleVariantSelector = function lowestBitrateCompatibleVariantSelector() {\n  // filter out any playlists that have been excluded due to\n  // incompatible configurations or playback errors\n  var playlists = this.playlists.master.playlists.filter(Playlist.isEnabled); // Sort ascending by bitrate\n\n  stableSort(playlists, function (a, b) {\n    return comparePlaylistBandwidth(a, b);\n  }); // Parse and assume that playlists with no video codec have no video\n  // (this is not necessarily true, although it is generally true).\n  //\n  // If an entire manifest has no valid videos everything will get filtered\n  // out.\n\n  var playlistsWithVideo = playlists.filter(function (playlist) {\n    return parseCodecs(playlist.attributes.CODECS).videoCodec;\n  });\n  return playlistsWithVideo[0] || null;\n};\n/**\n * Create captions text tracks on video.js if they do not exist\n *\n * @param {Object} inbandTextTracks a reference to current inbandTextTracks\n * @param {Object} tech the video.js tech\n * @param {Object} captionStreams the caption streams to create\n * @private\n */\n\n\nvar createCaptionsTrackIfNotExists = function createCaptionsTrackIfNotExists(inbandTextTracks, tech, captionStreams) {\n  for (var trackId in captionStreams) {\n    if (!inbandTextTracks[trackId]) {\n      tech.trigger({\n        type: 'usage',\n        name: 'hls-608'\n      });\n      var track = tech.textTracks().getTrackById(trackId);\n\n      if (track) {\n        // Resuse an existing track with a CC# id because this was\n        // very likely created by videojs-contrib-hls from information\n        // in the m3u8 for us to use\n        inbandTextTracks[trackId] = track;\n      } else {\n        // Otherwise, create a track with the default `CC#` label and\n        // without a language\n        inbandTextTracks[trackId] = tech.addRemoteTextTrack({\n          kind: 'captions',\n          id: trackId,\n          label: trackId\n        }, false).track;\n      }\n    }\n  }\n};\n\nvar addCaptionData = function addCaptionData(_ref) {\n  var inbandTextTracks = _ref.inbandTextTracks,\n      captionArray = _ref.captionArray,\n      timestampOffset = _ref.timestampOffset;\n\n  if (!captionArray) {\n    return;\n  }\n\n  var Cue = window.WebKitDataCue || window.VTTCue;\n  captionArray.forEach(function (caption) {\n    var track = caption.stream;\n    var startTime = caption.startTime;\n    var endTime = caption.endTime;\n\n    if (!inbandTextTracks[track]) {\n      return;\n    }\n\n    startTime += timestampOffset;\n    endTime += timestampOffset;\n    inbandTextTracks[track].addCue(new Cue(startTime, endTime, caption.text));\n  });\n};\n/**\n * @file segment-loader.js\n */\n// in ms\n\n\nvar CHECK_BUFFER_DELAY = 500;\n/**\n * Determines if we should call endOfStream on the media source based\n * on the state of the buffer or if appened segment was the final\n * segment in the playlist.\n *\n * @param {Object} playlist a media playlist object\n * @param {Object} mediaSource the MediaSource object\n * @param {Number} segmentIndex the index of segment we last appended\n * @returns {Boolean} do we need to call endOfStream on the MediaSource\n */\n\nvar detectEndOfStream = function detectEndOfStream(playlist, mediaSource, segmentIndex) {\n  if (!playlist || !mediaSource) {\n    return false;\n  }\n\n  var segments = playlist.segments; // determine a few boolean values to help make the branch below easier\n  // to read\n\n  var appendedLastSegment = segmentIndex === segments.length; // if we've buffered to the end of the video, we need to call endOfStream\n  // so that MediaSources can trigger the `ended` event when it runs out of\n  // buffered data instead of waiting for me\n\n  return playlist.endList && mediaSource.readyState === 'open' && appendedLastSegment;\n};\n\nvar finite = function finite(num) {\n  return typeof num === 'number' && isFinite(num);\n};\n\nvar illegalMediaSwitch = function illegalMediaSwitch(loaderType, startingMedia, newSegmentMedia) {\n  // Although these checks should most likely cover non 'main' types, for now it narrows\n  // the scope of our checks.\n  if (loaderType !== 'main' || !startingMedia || !newSegmentMedia) {\n    return null;\n  }\n\n  if (!newSegmentMedia.containsAudio && !newSegmentMedia.containsVideo) {\n    return 'Neither audio nor video found in segment.';\n  }\n\n  if (startingMedia.containsVideo && !newSegmentMedia.containsVideo) {\n    return 'Only audio found in segment when we expected video.' + ' We can\\'t switch to audio only from a stream that had video.' + ' To get rid of this message, please add codec information to the manifest.';\n  }\n\n  if (!startingMedia.containsVideo && newSegmentMedia.containsVideo) {\n    return 'Video found in segment when we expected only audio.' + ' We can\\'t switch to a stream with video from an audio only stream.' + ' To get rid of this message, please add codec information to the manifest.';\n  }\n\n  return null;\n};\n/**\n * Calculates a time value that is safe to remove from the back buffer without interupting\n * playback.\n *\n * @param {TimeRange} seekable\n *        The current seekable range\n * @param {Number} currentTime\n *        The current time of the player\n * @param {Number} targetDuration\n *        The target duration of the current playlist\n * @return {Number}\n *         Time that is safe to remove from the back buffer without interupting playback\n */\n\n\nvar safeBackBufferTrimTime = function safeBackBufferTrimTime(seekable$$1, currentTime, targetDuration) {\n  var removeToTime = void 0;\n\n  if (seekable$$1.length && seekable$$1.start(0) > 0 && seekable$$1.start(0) < currentTime) {\n    // If we have a seekable range use that as the limit for what can be removed safely\n    removeToTime = seekable$$1.start(0);\n  } else {\n    // otherwise remove anything older than 30 seconds before the current play head\n    removeToTime = currentTime - 30;\n  } // Don't allow removing from the buffer within target duration of current time\n  // to avoid the possibility of removing the GOP currently being played which could\n  // cause playback stalls.\n\n\n  return Math.min(removeToTime, currentTime - targetDuration);\n};\n\nvar segmentInfoString = function segmentInfoString(segmentInfo) {\n  var _segmentInfo$segment = segmentInfo.segment,\n      start = _segmentInfo$segment.start,\n      end = _segmentInfo$segment.end,\n      _segmentInfo$playlist = segmentInfo.playlist,\n      seq = _segmentInfo$playlist.mediaSequence,\n      id = _segmentInfo$playlist.id,\n      _segmentInfo$playlist2 = _segmentInfo$playlist.segments,\n      segments = _segmentInfo$playlist2 === undefined ? [] : _segmentInfo$playlist2,\n      index = segmentInfo.mediaIndex,\n      timeline = segmentInfo.timeline;\n  return ['appending [' + index + '] of [' + seq + ', ' + (seq + segments.length) + '] from playlist [' + id + ']', '[' + start + ' => ' + end + '] in timeline [' + timeline + ']'].join(' ');\n};\n/**\n * An object that manages segment loading and appending.\n *\n * @class SegmentLoader\n * @param {Object} options required and optional options\n * @extends videojs.EventTarget\n */\n\n\nvar SegmentLoader = function (_videojs$EventTarget) {\n  inherits(SegmentLoader, _videojs$EventTarget);\n\n  function SegmentLoader(settings) {\n    classCallCheck(this, SegmentLoader); // check pre-conditions\n\n    var _this = possibleConstructorReturn(this, (SegmentLoader.__proto__ || Object.getPrototypeOf(SegmentLoader)).call(this));\n\n    if (!settings) {\n      throw new TypeError('Initialization settings are required');\n    }\n\n    if (typeof settings.currentTime !== 'function') {\n      throw new TypeError('No currentTime getter specified');\n    }\n\n    if (!settings.mediaSource) {\n      throw new TypeError('No MediaSource specified');\n    } // public properties\n\n\n    _this.bandwidth = settings.bandwidth;\n    _this.throughput = {\n      rate: 0,\n      count: 0\n    };\n    _this.roundTrip = NaN;\n\n    _this.resetStats_();\n\n    _this.mediaIndex = null; // private settings\n\n    _this.hasPlayed_ = settings.hasPlayed;\n    _this.currentTime_ = settings.currentTime;\n    _this.seekable_ = settings.seekable;\n    _this.seeking_ = settings.seeking;\n    _this.duration_ = settings.duration;\n    _this.mediaSource_ = settings.mediaSource;\n    _this.hls_ = settings.hls;\n    _this.loaderType_ = settings.loaderType;\n    _this.startingMedia_ = void 0;\n    _this.segmentMetadataTrack_ = settings.segmentMetadataTrack;\n    _this.goalBufferLength_ = settings.goalBufferLength;\n    _this.sourceType_ = settings.sourceType;\n    _this.inbandTextTracks_ = settings.inbandTextTracks;\n    _this.state_ = 'INIT'; // private instance variables\n\n    _this.checkBufferTimeout_ = null;\n    _this.error_ = void 0;\n    _this.currentTimeline_ = -1;\n    _this.pendingSegment_ = null;\n    _this.mimeType_ = null;\n    _this.sourceUpdater_ = null;\n    _this.xhrOptions_ = null; // Fragmented mp4 playback\n\n    _this.activeInitSegmentId_ = null;\n    _this.initSegments_ = {}; // HLSe playback\n\n    _this.cacheEncryptionKeys_ = settings.cacheEncryptionKeys;\n    _this.keyCache_ = {}; // Fmp4 CaptionParser\n\n    if (_this.loaderType_ === 'main') {\n      _this.captionParser_ = new CaptionParser();\n    } else {\n      _this.captionParser_ = null;\n    }\n\n    _this.decrypter_ = settings.decrypter; // Manages the tracking and generation of sync-points, mappings\n    // between a time in the display time and a segment index within\n    // a playlist\n\n    _this.syncController_ = settings.syncController;\n    _this.syncPoint_ = {\n      segmentIndex: 0,\n      time: 0\n    };\n\n    _this.syncController_.on('syncinfoupdate', function () {\n      return _this.trigger('syncinfoupdate');\n    });\n\n    _this.mediaSource_.addEventListener('sourceopen', function () {\n      return _this.ended_ = false;\n    }); // ...for determining the fetch location\n\n\n    _this.fetchAtBuffer_ = false;\n    _this.logger_ = logger('SegmentLoader[' + _this.loaderType_ + ']');\n    Object.defineProperty(_this, 'state', {\n      get: function get$$1() {\n        return this.state_;\n      },\n      set: function set$$1(newState) {\n        if (newState !== this.state_) {\n          this.logger_(this.state_ + ' -> ' + newState);\n          this.state_ = newState;\n        }\n      }\n    });\n    return _this;\n  }\n  /**\n   * reset all of our media stats\n   *\n   * @private\n   */\n\n\n  createClass(SegmentLoader, [{\n    key: 'resetStats_',\n    value: function resetStats_() {\n      this.mediaBytesTransferred = 0;\n      this.mediaRequests = 0;\n      this.mediaRequestsAborted = 0;\n      this.mediaRequestsTimedout = 0;\n      this.mediaRequestsErrored = 0;\n      this.mediaTransferDuration = 0;\n      this.mediaSecondsLoaded = 0;\n    }\n    /**\n     * dispose of the SegmentLoader and reset to the default state\n     */\n\n  }, {\n    key: 'dispose',\n    value: function dispose() {\n      this.state = 'DISPOSED';\n      this.pause();\n      this.abort_();\n\n      if (this.sourceUpdater_) {\n        this.sourceUpdater_.dispose();\n      }\n\n      this.resetStats_();\n\n      if (this.captionParser_) {\n        this.captionParser_.reset();\n      }\n    }\n    /**\n     * abort anything that is currently doing on with the SegmentLoader\n     * and reset to a default state\n     */\n\n  }, {\n    key: 'abort',\n    value: function abort() {\n      if (this.state !== 'WAITING') {\n        if (this.pendingSegment_) {\n          this.pendingSegment_ = null;\n        }\n\n        return;\n      }\n\n      this.abort_(); // We aborted the requests we were waiting on, so reset the loader's state to READY\n      // since we are no longer \"waiting\" on any requests. XHR callback is not always run\n      // when the request is aborted. This will prevent the loader from being stuck in the\n      // WAITING state indefinitely.\n\n      this.state = 'READY'; // don't wait for buffer check timeouts to begin fetching the\n      // next segment\n\n      if (!this.paused()) {\n        this.monitorBuffer_();\n      }\n    }\n    /**\n     * abort all pending xhr requests and null any pending segements\n     *\n     * @private\n     */\n\n  }, {\n    key: 'abort_',\n    value: function abort_() {\n      if (this.pendingSegment_) {\n        this.pendingSegment_.abortRequests();\n      } // clear out the segment being processed\n\n\n      this.pendingSegment_ = null;\n    }\n    /**\n     * set an error on the segment loader and null out any pending segements\n     *\n     * @param {Error} error the error to set on the SegmentLoader\n     * @return {Error} the error that was set or that is currently set\n     */\n\n  }, {\n    key: 'error',\n    value: function error(_error) {\n      if (typeof _error !== 'undefined') {\n        this.error_ = _error;\n      }\n\n      this.pendingSegment_ = null;\n      return this.error_;\n    }\n  }, {\n    key: 'endOfStream',\n    value: function endOfStream() {\n      this.ended_ = true;\n      this.pause();\n      this.trigger('ended');\n    }\n    /**\n     * Indicates which time ranges are buffered\n     *\n     * @return {TimeRange}\n     *         TimeRange object representing the current buffered ranges\n     */\n\n  }, {\n    key: 'buffered_',\n    value: function buffered_() {\n      if (!this.sourceUpdater_) {\n        return videojs$1.createTimeRanges();\n      }\n\n      return this.sourceUpdater_.buffered();\n    }\n    /**\n     * Gets and sets init segment for the provided map\n     *\n     * @param {Object} map\n     *        The map object representing the init segment to get or set\n     * @param {Boolean=} set\n     *        If true, the init segment for the provided map should be saved\n     * @return {Object}\n     *         map object for desired init segment\n     */\n\n  }, {\n    key: 'initSegment',\n    value: function initSegment(map) {\n      var set$$1 = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;\n\n      if (!map) {\n        return null;\n      }\n\n      var id = initSegmentId(map);\n      var storedMap = this.initSegments_[id];\n\n      if (set$$1 && !storedMap && map.bytes) {\n        this.initSegments_[id] = storedMap = {\n          resolvedUri: map.resolvedUri,\n          byterange: map.byterange,\n          bytes: map.bytes,\n          timescales: map.timescales,\n          videoTrackIds: map.videoTrackIds\n        };\n      }\n\n      return storedMap || map;\n    }\n    /**\n     * Gets and sets key for the provided key\n     *\n     * @param {Object} key\n     *        The key object representing the key to get or set\n     * @param {Boolean=} set\n     *        If true, the key for the provided key should be saved\n     * @return {Object}\n     *         Key object for desired key\n     */\n\n  }, {\n    key: 'segmentKey',\n    value: function segmentKey(key) {\n      var set$$1 = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;\n\n      if (!key) {\n        return null;\n      }\n\n      var id = segmentKeyId(key);\n      var storedKey = this.keyCache_[id]; // TODO: We should use the HTTP Expires header to invalidate our cache per\n      // https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-6.2.3\n\n      if (this.cacheEncryptionKeys_ && set$$1 && !storedKey && key.bytes) {\n        this.keyCache_[id] = storedKey = {\n          resolvedUri: key.resolvedUri,\n          bytes: key.bytes\n        };\n      }\n\n      var result = {\n        resolvedUri: (storedKey || key).resolvedUri\n      };\n\n      if (storedKey) {\n        result.bytes = storedKey.bytes;\n      }\n\n      return result;\n    }\n    /**\n     * Returns true if all configuration required for loading is present, otherwise false.\n     *\n     * @return {Boolean} True if the all configuration is ready for loading\n     * @private\n     */\n\n  }, {\n    key: 'couldBeginLoading_',\n    value: function couldBeginLoading_() {\n      return this.playlist_ && ( // the source updater is created when init_ is called, so either having a\n      // source updater or being in the INIT state with a mimeType is enough\n      // to say we have all the needed configuration to start loading.\n      this.sourceUpdater_ || this.mimeType_ && this.state === 'INIT') && !this.paused();\n    }\n    /**\n     * load a playlist and start to fill the buffer\n     */\n\n  }, {\n    key: 'load',\n    value: function load() {\n      // un-pause\n      this.monitorBuffer_(); // if we don't have a playlist yet, keep waiting for one to be\n      // specified\n\n      if (!this.playlist_) {\n        return;\n      } // not sure if this is the best place for this\n\n\n      this.syncController_.setDateTimeMapping(this.playlist_); // if all the configuration is ready, initialize and begin loading\n\n      if (this.state === 'INIT' && this.couldBeginLoading_()) {\n        return this.init_();\n      } // if we're in the middle of processing a segment already, don't\n      // kick off an additional segment request\n\n\n      if (!this.couldBeginLoading_() || this.state !== 'READY' && this.state !== 'INIT') {\n        return;\n      }\n\n      this.state = 'READY';\n    }\n    /**\n     * Once all the starting parameters have been specified, begin\n     * operation. This method should only be invoked from the INIT\n     * state.\n     *\n     * @private\n     */\n\n  }, {\n    key: 'init_',\n    value: function init_() {\n      this.state = 'READY';\n      this.sourceUpdater_ = new SourceUpdater(this.mediaSource_, this.mimeType_, this.loaderType_, this.sourceBufferEmitter_);\n      this.resetEverything();\n      return this.monitorBuffer_();\n    }\n    /**\n     * set a playlist on the segment loader\n     *\n     * @param {PlaylistLoader} media the playlist to set on the segment loader\n     */\n\n  }, {\n    key: 'playlist',\n    value: function playlist(newPlaylist) {\n      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n\n      if (!newPlaylist) {\n        return;\n      }\n\n      var oldPlaylist = this.playlist_;\n      var segmentInfo = this.pendingSegment_;\n      this.playlist_ = newPlaylist;\n      this.xhrOptions_ = options; // when we haven't started playing yet, the start of a live playlist\n      // is always our zero-time so force a sync update each time the playlist\n      // is refreshed from the server\n\n      if (!this.hasPlayed_()) {\n        newPlaylist.syncInfo = {\n          mediaSequence: newPlaylist.mediaSequence,\n          time: 0\n        };\n      }\n\n      var oldId = null;\n\n      if (oldPlaylist) {\n        if (oldPlaylist.id) {\n          oldId = oldPlaylist.id;\n        } else if (oldPlaylist.uri) {\n          oldId = oldPlaylist.uri;\n        }\n      }\n\n      this.logger_('playlist update [' + oldId + ' => ' + (newPlaylist.id || newPlaylist.uri) + ']'); // in VOD, this is always a rendition switch (or we updated our syncInfo above)\n      // in LIVE, we always want to update with new playlists (including refreshes)\n\n      this.trigger('syncinfoupdate'); // if we were unpaused but waiting for a playlist, start\n      // buffering now\n\n      if (this.state === 'INIT' && this.couldBeginLoading_()) {\n        return this.init_();\n      }\n\n      if (!oldPlaylist || oldPlaylist.uri !== newPlaylist.uri) {\n        if (this.mediaIndex !== null) {\n          // we must \"resync\" the segment loader when we switch renditions and\n          // the segment loader is already synced to the previous rendition\n          this.resyncLoader();\n        } // the rest of this function depends on `oldPlaylist` being defined\n\n\n        return;\n      } // we reloaded the same playlist so we are in a live scenario\n      // and we will likely need to adjust the mediaIndex\n\n\n      var mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence;\n      this.logger_('live window shift [' + mediaSequenceDiff + ']'); // update the mediaIndex on the SegmentLoader\n      // this is important because we can abort a request and this value must be\n      // equal to the last appended mediaIndex\n\n      if (this.mediaIndex !== null) {\n        this.mediaIndex -= mediaSequenceDiff;\n      } // update the mediaIndex on the SegmentInfo object\n      // this is important because we will update this.mediaIndex with this value\n      // in `handleUpdateEnd_` after the segment has been successfully appended\n\n\n      if (segmentInfo) {\n        segmentInfo.mediaIndex -= mediaSequenceDiff; // we need to update the referenced segment so that timing information is\n        // saved for the new playlist's segment, however, if the segment fell off the\n        // playlist, we can leave the old reference and just lose the timing info\n\n        if (segmentInfo.mediaIndex >= 0) {\n          segmentInfo.segment = newPlaylist.segments[segmentInfo.mediaIndex];\n        }\n      }\n\n      this.syncController_.saveExpiredSegmentInfo(oldPlaylist, newPlaylist);\n    }\n    /**\n     * Prevent the loader from fetching additional segments. If there\n     * is a segment request outstanding, it will finish processing\n     * before the loader halts. A segment loader can be unpaused by\n     * calling load().\n     */\n\n  }, {\n    key: 'pause',\n    value: function pause() {\n      if (this.checkBufferTimeout_) {\n        window$1.clearTimeout(this.checkBufferTimeout_);\n        this.checkBufferTimeout_ = null;\n      }\n    }\n    /**\n     * Returns whether the segment loader is fetching additional\n     * segments when given the opportunity. This property can be\n     * modified through calls to pause() and load().\n     */\n\n  }, {\n    key: 'paused',\n    value: function paused() {\n      return this.checkBufferTimeout_ === null;\n    }\n    /**\n     * create/set the following mimetype on the SourceBuffer through a\n     * SourceUpdater\n     *\n     * @param {String} mimeType the mime type string to use\n     * @param {Object} sourceBufferEmitter an event emitter that fires when a source buffer\n     * is added to the media source\n     */\n\n  }, {\n    key: 'mimeType',\n    value: function mimeType(_mimeType, sourceBufferEmitter) {\n      if (this.mimeType_) {\n        return;\n      }\n\n      this.mimeType_ = _mimeType;\n      this.sourceBufferEmitter_ = sourceBufferEmitter; // if we were unpaused but waiting for a sourceUpdater, start\n      // buffering now\n\n      if (this.state === 'INIT' && this.couldBeginLoading_()) {\n        this.init_();\n      }\n    }\n    /**\n     * Delete all the buffered data and reset the SegmentLoader\n     * @param {Function} [done] an optional callback to be executed when the remove\n     * operation is complete\n     */\n\n  }, {\n    key: 'resetEverything',\n    value: function resetEverything(done) {\n      this.ended_ = false;\n      this.resetLoader();\n      this.remove(0, this.duration_(), done); // clears fmp4 captions\n\n      if (this.captionParser_) {\n        this.captionParser_.clearAllCaptions();\n      }\n\n      this.trigger('reseteverything');\n    }\n    /**\n     * Force the SegmentLoader to resync and start loading around the currentTime instead\n     * of starting at the end of the buffer\n     *\n     * Useful for fast quality changes\n     */\n\n  }, {\n    key: 'resetLoader',\n    value: function resetLoader() {\n      this.fetchAtBuffer_ = false;\n      this.resyncLoader();\n    }\n    /**\n     * Force the SegmentLoader to restart synchronization and make a conservative guess\n     * before returning to the simple walk-forward method\n     */\n\n  }, {\n    key: 'resyncLoader',\n    value: function resyncLoader() {\n      this.mediaIndex = null;\n      this.syncPoint_ = null;\n      this.abort();\n    }\n    /**\n     * Remove any data in the source buffer between start and end times\n     * @param {Number} start - the start time of the region to remove from the buffer\n     * @param {Number} end - the end time of the region to remove from the buffer\n     * @param {Function} [done] - an optional callback to be executed when the remove\n     * operation is complete\n     */\n\n  }, {\n    key: 'remove',\n    value: function remove(start, end, done) {\n      if (this.sourceUpdater_) {\n        this.sourceUpdater_.remove(start, end, done);\n      }\n\n      removeCuesFromTrack(start, end, this.segmentMetadataTrack_);\n\n      if (this.inbandTextTracks_) {\n        for (var id in this.inbandTextTracks_) {\n          removeCuesFromTrack(start, end, this.inbandTextTracks_[id]);\n        }\n      }\n    }\n    /**\n     * (re-)schedule monitorBufferTick_ to run as soon as possible\n     *\n     * @private\n     */\n\n  }, {\n    key: 'monitorBuffer_',\n    value: function monitorBuffer_() {\n      if (this.checkBufferTimeout_) {\n        window$1.clearTimeout(this.checkBufferTimeout_);\n      }\n\n      this.checkBufferTimeout_ = window$1.setTimeout(this.monitorBufferTick_.bind(this), 1);\n    }\n    /**\n     * As long as the SegmentLoader is in the READY state, periodically\n     * invoke fillBuffer_().\n     *\n     * @private\n     */\n\n  }, {\n    key: 'monitorBufferTick_',\n    value: function monitorBufferTick_() {\n      if (this.state === 'READY') {\n        this.fillBuffer_();\n      }\n\n      if (this.checkBufferTimeout_) {\n        window$1.clearTimeout(this.checkBufferTimeout_);\n      }\n\n      this.checkBufferTimeout_ = window$1.setTimeout(this.monitorBufferTick_.bind(this), CHECK_BUFFER_DELAY);\n    }\n    /**\n     * fill the buffer with segements unless the sourceBuffers are\n     * currently updating\n     *\n     * Note: this function should only ever be called by monitorBuffer_\n     * and never directly\n     *\n     * @private\n     */\n\n  }, {\n    key: 'fillBuffer_',\n    value: function fillBuffer_() {\n      if (this.sourceUpdater_.updating()) {\n        return;\n      }\n\n      if (!this.syncPoint_) {\n        this.syncPoint_ = this.syncController_.getSyncPoint(this.playlist_, this.duration_(), this.currentTimeline_, this.currentTime_());\n      } // see if we need to begin loading immediately\n\n\n      var segmentInfo = this.checkBuffer_(this.buffered_(), this.playlist_, this.mediaIndex, this.hasPlayed_(), this.currentTime_(), this.syncPoint_);\n\n      if (!segmentInfo) {\n        return;\n      }\n\n      if (this.isEndOfStream_(segmentInfo.mediaIndex)) {\n        this.endOfStream();\n        return;\n      }\n\n      if (segmentInfo.mediaIndex === this.playlist_.segments.length - 1 && this.mediaSource_.readyState === 'ended' && !this.seeking_()) {\n        return;\n      } // We will need to change timestampOffset of the sourceBuffer if:\n      // - The segment.timeline !== this.currentTimeline\n      //   (we are crossing a discontinuity somehow)\n      // - The \"timestampOffset\" for the start of this segment is less than\n      //   the currently set timestampOffset\n      // Also, clear captions if we are crossing a discontinuity boundary\n      // Previously, we changed the timestampOffset if the start of this segment\n      // is less than the currently set timestampOffset but this isn't wanted\n      // as it can produce bad behavior, especially around long running\n      // live streams\n\n\n      if (segmentInfo.timeline !== this.currentTimeline_) {\n        this.syncController_.reset();\n        segmentInfo.timestampOffset = segmentInfo.startOfSegment;\n\n        if (this.captionParser_) {\n          this.captionParser_.clearAllCaptions();\n        }\n      }\n\n      this.loadSegment_(segmentInfo);\n    }\n    /**\n     * Determines if this segment loader is at the end of it's stream.\n     *\n     * @param {Number} mediaIndex the index of segment we last appended\n     * @param {Object} [playlist=this.playlist_] a media playlist object\n     * @returns {Boolean} true if at end of stream, false otherwise.\n     */\n\n  }, {\n    key: 'isEndOfStream_',\n    value: function isEndOfStream_(mediaIndex) {\n      var playlist = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : this.playlist_;\n      return detectEndOfStream(playlist, this.mediaSource_, mediaIndex) && !this.sourceUpdater_.updating();\n    }\n    /**\n     * Determines what segment request should be made, given current playback\n     * state.\n     *\n     * @param {TimeRanges} buffered - the state of the buffer\n     * @param {Object} playlist - the playlist object to fetch segments from\n     * @param {Number} mediaIndex - the previous mediaIndex fetched or null\n     * @param {Boolean} hasPlayed - a flag indicating whether we have played or not\n     * @param {Number} currentTime - the playback position in seconds\n     * @param {Object} syncPoint - a segment info object that describes the\n     * @returns {Object} a segment request object that describes the segment to load\n     */\n\n  }, {\n    key: 'checkBuffer_',\n    value: function checkBuffer_(buffered, playlist, mediaIndex, hasPlayed, currentTime, syncPoint) {\n      var lastBufferedEnd = 0;\n      var startOfSegment = void 0;\n\n      if (buffered.length) {\n        lastBufferedEnd = buffered.end(buffered.length - 1);\n      }\n\n      var bufferedTime = Math.max(0, lastBufferedEnd - currentTime);\n\n      if (!playlist.segments.length) {\n        return null;\n      } // if there is plenty of content buffered, and the video has\n      // been played before relax for awhile\n\n\n      if (bufferedTime >= this.goalBufferLength_()) {\n        return null;\n      } // if the video has not yet played once, and we already have\n      // one segment downloaded do nothing\n\n\n      if (!hasPlayed && bufferedTime >= 1) {\n        return null;\n      } // When the syncPoint is null, there is no way of determining a good\n      // conservative segment index to fetch from\n      // The best thing to do here is to get the kind of sync-point data by\n      // making a request\n\n\n      if (syncPoint === null) {\n        mediaIndex = this.getSyncSegmentCandidate_(playlist);\n        return this.generateSegmentInfo_(playlist, mediaIndex, null, true);\n      } // Under normal playback conditions fetching is a simple walk forward\n\n\n      if (mediaIndex !== null) {\n        var segment = playlist.segments[mediaIndex];\n        startOfSegment = lastBufferedEnd;\n        return this.generateSegmentInfo_(playlist, mediaIndex + 1, startOfSegment, false);\n      } // There is a sync-point but the lack of a mediaIndex indicates that\n      // we need to make a good conservative guess about which segment to\n      // fetch\n\n\n      if (this.fetchAtBuffer_) {\n        // Find the segment containing the end of the buffer\n        var mediaSourceInfo = Playlist.getMediaInfoForTime(playlist, lastBufferedEnd, syncPoint.segmentIndex, syncPoint.time);\n        mediaIndex = mediaSourceInfo.mediaIndex;\n        startOfSegment = mediaSourceInfo.startTime;\n      } else {\n        // Find the segment containing currentTime\n        var _mediaSourceInfo = Playlist.getMediaInfoForTime(playlist, currentTime, syncPoint.segmentIndex, syncPoint.time);\n\n        mediaIndex = _mediaSourceInfo.mediaIndex;\n        startOfSegment = _mediaSourceInfo.startTime;\n      }\n\n      return this.generateSegmentInfo_(playlist, mediaIndex, startOfSegment, false);\n    }\n    /**\n     * The segment loader has no recourse except to fetch a segment in the\n     * current playlist and use the internal timestamps in that segment to\n     * generate a syncPoint. This function returns a good candidate index\n     * for that process.\n     *\n     * @param {Object} playlist - the playlist object to look for a\n     * @returns {Number} An index of a segment from the playlist to load\n     */\n\n  }, {\n    key: 'getSyncSegmentCandidate_',\n    value: function getSyncSegmentCandidate_(playlist) {\n      var _this2 = this;\n\n      if (this.currentTimeline_ === -1) {\n        return 0;\n      }\n\n      var segmentIndexArray = playlist.segments.map(function (s, i) {\n        return {\n          timeline: s.timeline,\n          segmentIndex: i\n        };\n      }).filter(function (s) {\n        return s.timeline === _this2.currentTimeline_;\n      });\n\n      if (segmentIndexArray.length) {\n        return segmentIndexArray[Math.min(segmentIndexArray.length - 1, 1)].segmentIndex;\n      }\n\n      return Math.max(playlist.segments.length - 1, 0);\n    }\n  }, {\n    key: 'generateSegmentInfo_',\n    value: function generateSegmentInfo_(playlist, mediaIndex, startOfSegment, isSyncRequest) {\n      if (mediaIndex < 0 || mediaIndex >= playlist.segments.length) {\n        return null;\n      }\n\n      var segment = playlist.segments[mediaIndex];\n      return {\n        requestId: 'segment-loader-' + Math.random(),\n        // resolve the segment URL relative to the playlist\n        uri: segment.resolvedUri,\n        // the segment's mediaIndex at the time it was requested\n        mediaIndex: mediaIndex,\n        // whether or not to update the SegmentLoader's state with this\n        // segment's mediaIndex\n        isSyncRequest: isSyncRequest,\n        startOfSegment: startOfSegment,\n        // the segment's playlist\n        playlist: playlist,\n        // unencrypted bytes of the segment\n        bytes: null,\n        // when a key is defined for this segment, the encrypted bytes\n        encryptedBytes: null,\n        // The target timestampOffset for this segment when we append it\n        // to the source buffer\n        timestampOffset: null,\n        // The timeline that the segment is in\n        timeline: segment.timeline,\n        // The expected duration of the segment in seconds\n        duration: segment.duration,\n        // retain the segment in case the playlist updates while doing an async process\n        segment: segment\n      };\n    }\n    /**\n     * Determines if the network has enough bandwidth to complete the current segment\n     * request in a timely manner. If not, the request will be aborted early and bandwidth\n     * updated to trigger a playlist switch.\n     *\n     * @param {Object} stats\n     *        Object containing stats about the request timing and size\n     * @return {Boolean} True if the request was aborted, false otherwise\n     * @private\n     */\n\n  }, {\n    key: 'abortRequestEarly_',\n    value: function abortRequestEarly_(stats) {\n      if (this.hls_.tech_.paused() || // Don't abort if the current playlist is on the lowestEnabledRendition\n      // TODO: Replace using timeout with a boolean indicating whether this playlist is\n      //       the lowestEnabledRendition.\n      !this.xhrOptions_.timeout || // Don't abort if we have no bandwidth information to estimate segment sizes\n      !this.playlist_.attributes.BANDWIDTH) {\n        return false;\n      } // Wait at least 1 second since the first byte of data has been received before\n      // using the calculated bandwidth from the progress event to allow the bitrate\n      // to stabilize\n\n\n      if (Date.now() - (stats.firstBytesReceivedAt || Date.now()) < 1000) {\n        return false;\n      }\n\n      var currentTime = this.currentTime_();\n      var measuredBandwidth = stats.bandwidth;\n      var segmentDuration = this.pendingSegment_.duration;\n      var requestTimeRemaining = Playlist.estimateSegmentRequestTime(segmentDuration, measuredBandwidth, this.playlist_, stats.bytesReceived); // Subtract 1 from the timeUntilRebuffer so we still consider an early abort\n      // if we are only left with less than 1 second when the request completes.\n      // A negative timeUntilRebuffering indicates we are already rebuffering\n\n      var timeUntilRebuffer$$1 = timeUntilRebuffer(this.buffered_(), currentTime, this.hls_.tech_.playbackRate()) - 1; // Only consider aborting early if the estimated time to finish the download\n      // is larger than the estimated time until the player runs out of forward buffer\n\n      if (requestTimeRemaining <= timeUntilRebuffer$$1) {\n        return false;\n      }\n\n      var switchCandidate = minRebufferMaxBandwidthSelector({\n        master: this.hls_.playlists.master,\n        currentTime: currentTime,\n        bandwidth: measuredBandwidth,\n        duration: this.duration_(),\n        segmentDuration: segmentDuration,\n        timeUntilRebuffer: timeUntilRebuffer$$1,\n        currentTimeline: this.currentTimeline_,\n        syncController: this.syncController_\n      });\n\n      if (!switchCandidate) {\n        return;\n      }\n\n      var rebufferingImpact = requestTimeRemaining - timeUntilRebuffer$$1;\n      var timeSavedBySwitching = rebufferingImpact - switchCandidate.rebufferingImpact;\n      var minimumTimeSaving = 0.5; // If we are already rebuffering, increase the amount of variance we add to the\n      // potential round trip time of the new request so that we are not too aggressive\n      // with switching to a playlist that might save us a fraction of a second.\n\n      if (timeUntilRebuffer$$1 <= TIME_FUDGE_FACTOR) {\n        minimumTimeSaving = 1;\n      }\n\n      if (!switchCandidate.playlist || switchCandidate.playlist.uri === this.playlist_.uri || timeSavedBySwitching < minimumTimeSaving) {\n        return false;\n      } // set the bandwidth to that of the desired playlist being sure to scale by\n      // BANDWIDTH_VARIANCE and add one so the playlist selector does not exclude it\n      // don't trigger a bandwidthupdate as the bandwidth is artifial\n\n\n      this.bandwidth = switchCandidate.playlist.attributes.BANDWIDTH * Config.BANDWIDTH_VARIANCE + 1;\n      this.abort();\n      this.trigger('earlyabort');\n      return true;\n    }\n    /**\n     * XHR `progress` event handler\n     *\n     * @param {Event}\n     *        The XHR `progress` event\n     * @param {Object} simpleSegment\n     *        A simplified segment object copy\n     * @private\n     */\n\n  }, {\n    key: 'handleProgress_',\n    value: function handleProgress_(event, simpleSegment) {\n      if (!this.pendingSegment_ || simpleSegment.requestId !== this.pendingSegment_.requestId || this.abortRequestEarly_(simpleSegment.stats)) {\n        return;\n      }\n\n      this.trigger('progress');\n    }\n    /**\n     * load a specific segment from a request into the buffer\n     *\n     * @private\n     */\n\n  }, {\n    key: 'loadSegment_',\n    value: function loadSegment_(segmentInfo) {\n      this.state = 'WAITING';\n      this.pendingSegment_ = segmentInfo;\n      this.trimBackBuffer_(segmentInfo);\n      segmentInfo.abortRequests = mediaSegmentRequest(this.hls_.xhr, this.xhrOptions_, this.decrypter_, this.captionParser_, this.createSimplifiedSegmentObj_(segmentInfo), // progress callback\n      this.handleProgress_.bind(this), this.segmentRequestFinished_.bind(this));\n    }\n    /**\n     * trim the back buffer so that we don't have too much data\n     * in the source buffer\n     *\n     * @private\n     *\n     * @param {Object} segmentInfo - the current segment\n     */\n\n  }, {\n    key: 'trimBackBuffer_',\n    value: function trimBackBuffer_(segmentInfo) {\n      var removeToTime = safeBackBufferTrimTime(this.seekable_(), this.currentTime_(), this.playlist_.targetDuration || 10); // Chrome has a hard limit of 150MB of\n      // buffer and a very conservative \"garbage collector\"\n      // We manually clear out the old buffer to ensure\n      // we don't trigger the QuotaExceeded error\n      // on the source buffer during subsequent appends\n\n      if (removeToTime > 0) {\n        this.remove(0, removeToTime);\n      }\n    }\n    /**\n     * created a simplified copy of the segment object with just the\n     * information necessary to perform the XHR and decryption\n     *\n     * @private\n     *\n     * @param {Object} segmentInfo - the current segment\n     * @returns {Object} a simplified segment object copy\n     */\n\n  }, {\n    key: 'createSimplifiedSegmentObj_',\n    value: function createSimplifiedSegmentObj_(segmentInfo) {\n      var segment = segmentInfo.segment;\n      var simpleSegment = {\n        resolvedUri: segment.resolvedUri,\n        byterange: segment.byterange,\n        requestId: segmentInfo.requestId\n      };\n\n      if (segment.key) {\n        // if the media sequence is greater than 2^32, the IV will be incorrect\n        // assuming 10s segments, that would be about 1300 years\n        var iv = segment.key.iv || new Uint32Array([0, 0, 0, segmentInfo.mediaIndex + segmentInfo.playlist.mediaSequence]);\n        simpleSegment.key = this.segmentKey(segment.key);\n        simpleSegment.key.iv = iv;\n      }\n\n      if (segment.map) {\n        simpleSegment.map = this.initSegment(segment.map);\n      }\n\n      return simpleSegment;\n    }\n    /**\n     * Handle the callback from the segmentRequest function and set the\n     * associated SegmentLoader state and errors if necessary\n     *\n     * @private\n     */\n\n  }, {\n    key: 'segmentRequestFinished_',\n    value: function segmentRequestFinished_(error, simpleSegment) {\n      // every request counts as a media request even if it has been aborted\n      // or canceled due to a timeout\n      this.mediaRequests += 1;\n\n      if (simpleSegment.stats) {\n        this.mediaBytesTransferred += simpleSegment.stats.bytesReceived;\n        this.mediaTransferDuration += simpleSegment.stats.roundTripTime;\n      } // The request was aborted and the SegmentLoader has already been reset\n\n\n      if (!this.pendingSegment_) {\n        this.mediaRequestsAborted += 1;\n        return;\n      } // the request was aborted and the SegmentLoader has already started\n      // another request. this can happen when the timeout for an aborted\n      // request triggers due to a limitation in the XHR library\n      // do not count this as any sort of request or we risk double-counting\n\n\n      if (simpleSegment.requestId !== this.pendingSegment_.requestId) {\n        return;\n      } // an error occurred from the active pendingSegment_ so reset everything\n\n\n      if (error) {\n        this.pendingSegment_ = null;\n        this.state = 'READY'; // the requests were aborted just record the aborted stat and exit\n        // this is not a true error condition and nothing corrective needs\n        // to be done\n\n        if (error.code === REQUEST_ERRORS.ABORTED) {\n          this.mediaRequestsAborted += 1;\n          return;\n        }\n\n        this.pause(); // the error is really just that at least one of the requests timed-out\n        // set the bandwidth to a very low value and trigger an ABR switch to\n        // take emergency action\n\n        if (error.code === REQUEST_ERRORS.TIMEOUT) {\n          this.mediaRequestsTimedout += 1;\n          this.bandwidth = 1;\n          this.roundTrip = NaN;\n          this.trigger('bandwidthupdate');\n          return;\n        } // if control-flow has arrived here, then the error is real\n        // emit an error event to blacklist the current playlist\n\n\n        this.mediaRequestsErrored += 1;\n        this.error(error);\n        this.trigger('error');\n        return;\n      } // the response was a success so set any bandwidth stats the request\n      // generated for ABR purposes\n\n\n      this.bandwidth = simpleSegment.stats.bandwidth;\n      this.roundTrip = simpleSegment.stats.roundTripTime; // if this request included an initialization segment, save that data\n      // to the initSegment cache\n\n      if (simpleSegment.map) {\n        simpleSegment.map = this.initSegment(simpleSegment.map, true);\n      } // if this request included a segment key, save that data in the cache\n\n\n      if (simpleSegment.key) {\n        this.segmentKey(simpleSegment.key, true);\n      }\n\n      this.processSegmentResponse_(simpleSegment);\n    }\n    /**\n     * Move any important data from the simplified segment object\n     * back to the real segment object for future phases\n     *\n     * @private\n     */\n\n  }, {\n    key: 'processSegmentResponse_',\n    value: function processSegmentResponse_(simpleSegment) {\n      var segmentInfo = this.pendingSegment_;\n      segmentInfo.bytes = simpleSegment.bytes;\n\n      if (simpleSegment.map) {\n        segmentInfo.segment.map.bytes = simpleSegment.map.bytes;\n      }\n\n      segmentInfo.endOfAllRequests = simpleSegment.endOfAllRequests; // This has fmp4 captions, add them to text tracks\n\n      if (simpleSegment.fmp4Captions) {\n        createCaptionsTrackIfNotExists(this.inbandTextTracks_, this.hls_.tech_, simpleSegment.captionStreams);\n        addCaptionData({\n          inbandTextTracks: this.inbandTextTracks_,\n          captionArray: simpleSegment.fmp4Captions,\n          // fmp4s will not have a timestamp offset\n          timestampOffset: 0\n        }); // Reset stored captions since we added parsed\n        // captions to a text track at this point\n\n        if (this.captionParser_) {\n          this.captionParser_.clearParsedCaptions();\n        }\n      }\n\n      this.handleSegment_();\n    }\n    /**\n     * append a decrypted segement to the SourceBuffer through a SourceUpdater\n     *\n     * @private\n     */\n\n  }, {\n    key: 'handleSegment_',\n    value: function handleSegment_() {\n      var _this3 = this;\n\n      if (!this.pendingSegment_) {\n        this.state = 'READY';\n        return;\n      }\n\n      var segmentInfo = this.pendingSegment_;\n      var segment = segmentInfo.segment;\n      var timingInfo = this.syncController_.probeSegmentInfo(segmentInfo); // When we have our first timing info, determine what media types this loader is\n      // dealing with. Although we're maintaining extra state, it helps to preserve the\n      // separation of segment loader from the actual source buffers.\n\n      if (typeof this.startingMedia_ === 'undefined' && timingInfo && ( // Guard against cases where we're not getting timing info at all until we are\n      // certain that all streams will provide it.\n      timingInfo.containsAudio || timingInfo.containsVideo)) {\n        this.startingMedia_ = {\n          containsAudio: timingInfo.containsAudio,\n          containsVideo: timingInfo.containsVideo\n        };\n      }\n\n      var illegalMediaSwitchError = illegalMediaSwitch(this.loaderType_, this.startingMedia_, timingInfo);\n\n      if (illegalMediaSwitchError) {\n        this.error({\n          message: illegalMediaSwitchError,\n          blacklistDuration: Infinity\n        });\n        this.trigger('error');\n        return;\n      }\n\n      if (segmentInfo.isSyncRequest) {\n        this.trigger('syncinfoupdate');\n        this.pendingSegment_ = null;\n        this.state = 'READY';\n        return;\n      }\n\n      if (segmentInfo.timestampOffset !== null && segmentInfo.timestampOffset !== this.sourceUpdater_.timestampOffset()) {\n        // Subtract any difference between the PTS and DTS times of the first frame\n        // from the timeStampOffset (which currently equals the buffered.end) to prevent\n        // creating any gaps in the buffer\n        if (timingInfo && timingInfo.segmentTimestampInfo) {\n          var ptsStartTime = timingInfo.segmentTimestampInfo[0].ptsTime;\n          var dtsStartTime = timingInfo.segmentTimestampInfo[0].dtsTime;\n          segmentInfo.timestampOffset -= ptsStartTime - dtsStartTime;\n        }\n\n        this.sourceUpdater_.timestampOffset(segmentInfo.timestampOffset); // fired when a timestamp offset is set in HLS (can also identify discontinuities)\n\n        this.trigger('timestampoffset');\n      }\n\n      var timelineMapping = this.syncController_.mappingForTimeline(segmentInfo.timeline);\n\n      if (timelineMapping !== null) {\n        this.trigger({\n          type: 'segmenttimemapping',\n          mapping: timelineMapping\n        });\n      }\n\n      this.state = 'APPENDING'; // if the media initialization segment is changing, append it\n      // before the content segment\n\n      if (segment.map) {\n        var initId = initSegmentId(segment.map);\n\n        if (!this.activeInitSegmentId_ || this.activeInitSegmentId_ !== initId) {\n          var initSegment = this.initSegment(segment.map);\n          this.sourceUpdater_.appendBuffer({\n            bytes: initSegment.bytes\n          }, function () {\n            _this3.activeInitSegmentId_ = initId;\n          });\n        }\n      }\n\n      segmentInfo.byteLength = segmentInfo.bytes.byteLength;\n\n      if (typeof segment.start === 'number' && typeof segment.end === 'number') {\n        this.mediaSecondsLoaded += segment.end - segment.start;\n      } else {\n        this.mediaSecondsLoaded += segment.duration;\n      }\n\n      this.logger_(segmentInfoString(segmentInfo));\n      this.sourceUpdater_.appendBuffer({\n        bytes: segmentInfo.bytes,\n        videoSegmentTimingInfoCallback: this.handleVideoSegmentTimingInfo_.bind(this, segmentInfo.requestId)\n      }, this.handleUpdateEnd_.bind(this));\n    }\n  }, {\n    key: 'handleVideoSegmentTimingInfo_',\n    value: function handleVideoSegmentTimingInfo_(requestId, event) {\n      if (!this.pendingSegment_ || requestId !== this.pendingSegment_.requestId) {\n        return;\n      }\n\n      var segment = this.pendingSegment_.segment;\n\n      if (!segment.videoTimingInfo) {\n        segment.videoTimingInfo = {};\n      }\n\n      segment.videoTimingInfo.transmuxerPrependedSeconds = event.videoSegmentTimingInfo.prependedContentDuration || 0;\n      segment.videoTimingInfo.transmuxedPresentationStart = event.videoSegmentTimingInfo.start.presentation;\n      segment.videoTimingInfo.transmuxedPresentationEnd = event.videoSegmentTimingInfo.end.presentation; // mainly used as a reference for debugging\n\n      segment.videoTimingInfo.baseMediaDecodeTime = event.videoSegmentTimingInfo.baseMediaDecodeTime;\n    }\n    /**\n     * callback to run when appendBuffer is finished. detects if we are\n     * in a good state to do things with the data we got, or if we need\n     * to wait for more\n     *\n     * @private\n     */\n\n  }, {\n    key: 'handleUpdateEnd_',\n    value: function handleUpdateEnd_() {\n      if (!this.pendingSegment_) {\n        this.state = 'READY';\n\n        if (!this.paused()) {\n          this.monitorBuffer_();\n        }\n\n        return;\n      }\n\n      var segmentInfo = this.pendingSegment_;\n      var segment = segmentInfo.segment;\n      var isWalkingForward = this.mediaIndex !== null;\n      this.pendingSegment_ = null;\n      this.recordThroughput_(segmentInfo);\n      this.addSegmentMetadataCue_(segmentInfo);\n      this.state = 'READY';\n      this.mediaIndex = segmentInfo.mediaIndex;\n      this.fetchAtBuffer_ = true;\n      this.currentTimeline_ = segmentInfo.timeline; // We must update the syncinfo to recalculate the seekable range before\n      // the following conditional otherwise it may consider this a bad \"guess\"\n      // and attempt to resync when the post-update seekable window and live\n      // point would mean that this was the perfect segment to fetch\n\n      this.trigger('syncinfoupdate'); // If we previously appended a segment that ends more than 3 targetDurations before\n      // the currentTime_ that means that our conservative guess was too conservative.\n      // In that case, reset the loader state so that we try to use any information gained\n      // from the previous request to create a new, more accurate, sync-point.\n\n      if (segment.end && this.currentTime_() - segment.end > segmentInfo.playlist.targetDuration * 3) {\n        this.resetEverything();\n        return;\n      } // Don't do a rendition switch unless we have enough time to get a sync segment\n      // and conservatively guess\n\n\n      if (isWalkingForward) {\n        this.trigger('bandwidthupdate');\n      }\n\n      this.trigger('progress'); // any time an update finishes and the last segment is in the\n      // buffer, end the stream. this ensures the \"ended\" event will\n      // fire if playback reaches that point.\n\n      if (this.isEndOfStream_(segmentInfo.mediaIndex + 1, segmentInfo.playlist)) {\n        this.endOfStream();\n      }\n\n      if (!this.paused()) {\n        this.monitorBuffer_();\n      }\n    }\n    /**\n     * Records the current throughput of the decrypt, transmux, and append\n     * portion of the semgment pipeline. `throughput.rate` is a the cumulative\n     * moving average of the throughput. `throughput.count` is the number of\n     * data points in the average.\n     *\n     * @private\n     * @param {Object} segmentInfo the object returned by loadSegment\n     */\n\n  }, {\n    key: 'recordThroughput_',\n    value: function recordThroughput_(segmentInfo) {\n      var rate = this.throughput.rate; // Add one to the time to ensure that we don't accidentally attempt to divide\n      // by zero in the case where the throughput is ridiculously high\n\n      var segmentProcessingTime = Date.now() - segmentInfo.endOfAllRequests + 1; // Multiply by 8000 to convert from bytes/millisecond to bits/second\n\n      var segmentProcessingThroughput = Math.floor(segmentInfo.byteLength / segmentProcessingTime * 8 * 1000); // This is just a cumulative moving average calculation:\n      //   newAvg = oldAvg + (sample - oldAvg) / (sampleCount + 1)\n\n      this.throughput.rate += (segmentProcessingThroughput - rate) / ++this.throughput.count;\n    }\n    /**\n     * Adds a cue to the segment-metadata track with some metadata information about the\n     * segment\n     *\n     * @private\n     * @param {Object} segmentInfo\n     *        the object returned by loadSegment\n     * @method addSegmentMetadataCue_\n     */\n\n  }, {\n    key: 'addSegmentMetadataCue_',\n    value: function addSegmentMetadataCue_(segmentInfo) {\n      if (!this.segmentMetadataTrack_) {\n        return;\n      }\n\n      var segment = segmentInfo.segment;\n      var start = segment.start;\n      var end = segment.end; // Do not try adding the cue if the start and end times are invalid.\n\n      if (!finite(start) || !finite(end)) {\n        return;\n      }\n\n      removeCuesFromTrack(start, end, this.segmentMetadataTrack_);\n      var Cue = window$1.WebKitDataCue || window$1.VTTCue;\n      var value = {\n        custom: segment.custom,\n        dateTimeObject: segment.dateTimeObject,\n        dateTimeString: segment.dateTimeString,\n        bandwidth: segmentInfo.playlist.attributes.BANDWIDTH,\n        resolution: segmentInfo.playlist.attributes.RESOLUTION,\n        codecs: segmentInfo.playlist.attributes.CODECS,\n        byteLength: segmentInfo.byteLength,\n        uri: segmentInfo.uri,\n        timeline: segmentInfo.timeline,\n        playlist: segmentInfo.playlist.uri,\n        start: start,\n        end: end\n      };\n      var data = JSON.stringify(value);\n      var cue = new Cue(start, end, data); // Attach the metadata to the value property of the cue to keep consistency between\n      // the differences of WebKitDataCue in safari and VTTCue in other browsers\n\n      cue.value = value;\n      this.segmentMetadataTrack_.addCue(cue);\n    }\n  }]);\n  return SegmentLoader;\n}(videojs$1.EventTarget);\n\nvar uint8ToUtf8 = function uint8ToUtf8(uintArray) {\n  return decodeURIComponent(escape(String.fromCharCode.apply(null, uintArray)));\n};\n/**\n * @file vtt-segment-loader.js\n */\n\n\nvar VTT_LINE_TERMINATORS = new Uint8Array('\\n\\n'.split('').map(function (_char2) {\n  return _char2.charCodeAt(0);\n}));\n/**\n * An object that manages segment loading and appending.\n *\n * @class VTTSegmentLoader\n * @param {Object} options required and optional options\n * @extends videojs.EventTarget\n */\n\nvar VTTSegmentLoader = function (_SegmentLoader) {\n  inherits(VTTSegmentLoader, _SegmentLoader);\n\n  function VTTSegmentLoader(settings) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    classCallCheck(this, VTTSegmentLoader); // SegmentLoader requires a MediaSource be specified or it will throw an error;\n    // however, VTTSegmentLoader has no need of a media source, so delete the reference\n\n    var _this = possibleConstructorReturn(this, (VTTSegmentLoader.__proto__ || Object.getPrototypeOf(VTTSegmentLoader)).call(this, settings, options));\n\n    _this.mediaSource_ = null;\n    _this.subtitlesTrack_ = null;\n    return _this;\n  }\n  /**\n   * Indicates which time ranges are buffered\n   *\n   * @return {TimeRange}\n   *         TimeRange object representing the current buffered ranges\n   */\n\n\n  createClass(VTTSegmentLoader, [{\n    key: 'buffered_',\n    value: function buffered_() {\n      if (!this.subtitlesTrack_ || !this.subtitlesTrack_.cues.length) {\n        return videojs$1.createTimeRanges();\n      }\n\n      var cues = this.subtitlesTrack_.cues;\n      var start = cues[0].startTime;\n      var end = cues[cues.length - 1].startTime;\n      return videojs$1.createTimeRanges([[start, end]]);\n    }\n    /**\n     * Gets and sets init segment for the provided map\n     *\n     * @param {Object} map\n     *        The map object representing the init segment to get or set\n     * @param {Boolean=} set\n     *        If true, the init segment for the provided map should be saved\n     * @return {Object}\n     *         map object for desired init segment\n     */\n\n  }, {\n    key: 'initSegment',\n    value: function initSegment(map) {\n      var set$$1 = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;\n\n      if (!map) {\n        return null;\n      }\n\n      var id = initSegmentId(map);\n      var storedMap = this.initSegments_[id];\n\n      if (set$$1 && !storedMap && map.bytes) {\n        // append WebVTT line terminators to the media initialization segment if it exists\n        // to follow the WebVTT spec (https://w3c.github.io/webvtt/#file-structure) that\n        // requires two or more WebVTT line terminators between the WebVTT header and the\n        // rest of the file\n        var combinedByteLength = VTT_LINE_TERMINATORS.byteLength + map.bytes.byteLength;\n        var combinedSegment = new Uint8Array(combinedByteLength);\n        combinedSegment.set(map.bytes);\n        combinedSegment.set(VTT_LINE_TERMINATORS, map.bytes.byteLength);\n        this.initSegments_[id] = storedMap = {\n          resolvedUri: map.resolvedUri,\n          byterange: map.byterange,\n          bytes: combinedSegment\n        };\n      }\n\n      return storedMap || map;\n    }\n    /**\n     * Returns true if all configuration required for loading is present, otherwise false.\n     *\n     * @return {Boolean} True if the all configuration is ready for loading\n     * @private\n     */\n\n  }, {\n    key: 'couldBeginLoading_',\n    value: function couldBeginLoading_() {\n      return this.playlist_ && this.subtitlesTrack_ && !this.paused();\n    }\n    /**\n     * Once all the starting parameters have been specified, begin\n     * operation. This method should only be invoked from the INIT\n     * state.\n     *\n     * @private\n     */\n\n  }, {\n    key: 'init_',\n    value: function init_() {\n      this.state = 'READY';\n      this.resetEverything();\n      return this.monitorBuffer_();\n    }\n    /**\n     * Set a subtitle track on the segment loader to add subtitles to\n     *\n     * @param {TextTrack=} track\n     *        The text track to add loaded subtitles to\n     * @return {TextTrack}\n     *        Returns the subtitles track\n     */\n\n  }, {\n    key: 'track',\n    value: function track(_track) {\n      if (typeof _track === 'undefined') {\n        return this.subtitlesTrack_;\n      }\n\n      this.subtitlesTrack_ = _track; // if we were unpaused but waiting for a sourceUpdater, start\n      // buffering now\n\n      if (this.state === 'INIT' && this.couldBeginLoading_()) {\n        this.init_();\n      }\n\n      return this.subtitlesTrack_;\n    }\n    /**\n     * Remove any data in the source buffer between start and end times\n     * @param {Number} start - the start time of the region to remove from the buffer\n     * @param {Number} end - the end time of the region to remove from the buffer\n     */\n\n  }, {\n    key: 'remove',\n    value: function remove(start, end) {\n      removeCuesFromTrack(start, end, this.subtitlesTrack_);\n    }\n    /**\n     * fill the buffer with segements unless the sourceBuffers are\n     * currently updating\n     *\n     * Note: this function should only ever be called by monitorBuffer_\n     * and never directly\n     *\n     * @private\n     */\n\n  }, {\n    key: 'fillBuffer_',\n    value: function fillBuffer_() {\n      var _this2 = this;\n\n      if (!this.syncPoint_) {\n        this.syncPoint_ = this.syncController_.getSyncPoint(this.playlist_, this.duration_(), this.currentTimeline_, this.currentTime_());\n      } // see if we need to begin loading immediately\n\n\n      var segmentInfo = this.checkBuffer_(this.buffered_(), this.playlist_, this.mediaIndex, this.hasPlayed_(), this.currentTime_(), this.syncPoint_);\n      segmentInfo = this.skipEmptySegments_(segmentInfo);\n\n      if (!segmentInfo) {\n        return;\n      }\n\n      if (this.syncController_.timestampOffsetForTimeline(segmentInfo.timeline) === null) {\n        // We don't have the timestamp offset that we need to sync subtitles.\n        // Rerun on a timestamp offset or user interaction.\n        var checkTimestampOffset = function checkTimestampOffset() {\n          _this2.state = 'READY';\n\n          if (!_this2.paused()) {\n            // if not paused, queue a buffer check as soon as possible\n            _this2.monitorBuffer_();\n          }\n        };\n\n        this.syncController_.one('timestampoffset', checkTimestampOffset);\n        this.state = 'WAITING_ON_TIMELINE';\n        return;\n      }\n\n      this.loadSegment_(segmentInfo);\n    }\n    /**\n     * Prevents the segment loader from requesting segments we know contain no subtitles\n     * by walking forward until we find the next segment that we don't know whether it is\n     * empty or not.\n     *\n     * @param {Object} segmentInfo\n     *        a segment info object that describes the current segment\n     * @return {Object}\n     *         a segment info object that describes the current segment\n     */\n\n  }, {\n    key: 'skipEmptySegments_',\n    value: function skipEmptySegments_(segmentInfo) {\n      while (segmentInfo && segmentInfo.segment.empty) {\n        segmentInfo = this.generateSegmentInfo_(segmentInfo.playlist, segmentInfo.mediaIndex + 1, segmentInfo.startOfSegment + segmentInfo.duration, segmentInfo.isSyncRequest);\n      }\n\n      return segmentInfo;\n    }\n    /**\n     * append a decrypted segement to the SourceBuffer through a SourceUpdater\n     *\n     * @private\n     */\n\n  }, {\n    key: 'handleSegment_',\n    value: function handleSegment_() {\n      var _this3 = this;\n\n      if (!this.pendingSegment_ || !this.subtitlesTrack_) {\n        this.state = 'READY';\n        return;\n      }\n\n      this.state = 'APPENDING';\n      var segmentInfo = this.pendingSegment_;\n      var segment = segmentInfo.segment; // Make sure that vttjs has loaded, otherwise, wait till it finished loading\n\n      if (typeof window$1.WebVTT !== 'function' && this.subtitlesTrack_ && this.subtitlesTrack_.tech_) {\n        var loadHandler = void 0;\n\n        var errorHandler = function errorHandler() {\n          _this3.subtitlesTrack_.tech_.off('vttjsloaded', loadHandler);\n\n          _this3.error({\n            message: 'Error loading vtt.js'\n          });\n\n          _this3.state = 'READY';\n\n          _this3.pause();\n\n          _this3.trigger('error');\n        };\n\n        loadHandler = function loadHandler() {\n          _this3.subtitlesTrack_.tech_.off('vttjserror', errorHandler);\n\n          _this3.handleSegment_();\n        };\n\n        this.state = 'WAITING_ON_VTTJS';\n        this.subtitlesTrack_.tech_.one('vttjsloaded', loadHandler);\n        this.subtitlesTrack_.tech_.one('vttjserror', errorHandler);\n        return;\n      }\n\n      segment.requested = true;\n\n      try {\n        this.parseVTTCues_(segmentInfo);\n      } catch (e) {\n        this.error({\n          message: e.message\n        });\n        this.state = 'READY';\n        this.pause();\n        return this.trigger('error');\n      }\n\n      this.updateTimeMapping_(segmentInfo, this.syncController_.timelines[segmentInfo.timeline], this.playlist_);\n\n      if (segmentInfo.isSyncRequest) {\n        this.trigger('syncinfoupdate');\n        this.pendingSegment_ = null;\n        this.state = 'READY';\n        return;\n      }\n\n      segmentInfo.byteLength = segmentInfo.bytes.byteLength;\n      this.mediaSecondsLoaded += segment.duration;\n\n      if (segmentInfo.cues.length) {\n        // remove any overlapping cues to prevent doubling\n        this.remove(segmentInfo.cues[0].endTime, segmentInfo.cues[segmentInfo.cues.length - 1].endTime);\n      }\n\n      segmentInfo.cues.forEach(function (cue) {\n        _this3.subtitlesTrack_.addCue(cue);\n      });\n      this.handleUpdateEnd_();\n    }\n    /**\n     * Uses the WebVTT parser to parse the segment response\n     *\n     * @param {Object} segmentInfo\n     *        a segment info object that describes the current segment\n     * @private\n     */\n\n  }, {\n    key: 'parseVTTCues_',\n    value: function parseVTTCues_(segmentInfo) {\n      var decoder = void 0;\n      var decodeBytesToString = false;\n\n      if (typeof window$1.TextDecoder === 'function') {\n        decoder = new window$1.TextDecoder('utf8');\n      } else {\n        decoder = window$1.WebVTT.StringDecoder();\n        decodeBytesToString = true;\n      }\n\n      var parser = new window$1.WebVTT.Parser(window$1, window$1.vttjs, decoder);\n      segmentInfo.cues = [];\n      segmentInfo.timestampmap = {\n        MPEGTS: 0,\n        LOCAL: 0\n      };\n      parser.oncue = segmentInfo.cues.push.bind(segmentInfo.cues);\n\n      parser.ontimestampmap = function (map) {\n        return segmentInfo.timestampmap = map;\n      };\n\n      parser.onparsingerror = function (error) {\n        videojs$1.log.warn('Error encountered when parsing cues: ' + error.message);\n      };\n\n      if (segmentInfo.segment.map) {\n        var mapData = segmentInfo.segment.map.bytes;\n\n        if (decodeBytesToString) {\n          mapData = uint8ToUtf8(mapData);\n        }\n\n        parser.parse(mapData);\n      }\n\n      var segmentData = segmentInfo.bytes;\n\n      if (decodeBytesToString) {\n        segmentData = uint8ToUtf8(segmentData);\n      }\n\n      parser.parse(segmentData);\n      parser.flush();\n    }\n    /**\n     * Updates the start and end times of any cues parsed by the WebVTT parser using\n     * the information parsed from the X-TIMESTAMP-MAP header and a TS to media time mapping\n     * from the SyncController\n     *\n     * @param {Object} segmentInfo\n     *        a segment info object that describes the current segment\n     * @param {Object} mappingObj\n     *        object containing a mapping from TS to media time\n     * @param {Object} playlist\n     *        the playlist object containing the segment\n     * @private\n     */\n\n  }, {\n    key: 'updateTimeMapping_',\n    value: function updateTimeMapping_(segmentInfo, mappingObj, playlist) {\n      var segment = segmentInfo.segment;\n\n      if (!mappingObj) {\n        // If the sync controller does not have a mapping of TS to Media Time for the\n        // timeline, then we don't have enough information to update the cue\n        // start/end times\n        return;\n      }\n\n      if (!segmentInfo.cues.length) {\n        // If there are no cues, we also do not have enough information to figure out\n        // segment timing. Mark that the segment contains no cues so we don't re-request\n        // an empty segment.\n        segment.empty = true;\n        return;\n      }\n\n      var timestampmap = segmentInfo.timestampmap;\n      var diff = timestampmap.MPEGTS / 90000 - timestampmap.LOCAL + mappingObj.mapping;\n      segmentInfo.cues.forEach(function (cue) {\n        // First convert cue time to TS time using the timestamp-map provided within the vtt\n        cue.startTime += diff;\n        cue.endTime += diff;\n      });\n\n      if (!playlist.syncInfo) {\n        var firstStart = segmentInfo.cues[0].startTime;\n        var lastStart = segmentInfo.cues[segmentInfo.cues.length - 1].startTime;\n        playlist.syncInfo = {\n          mediaSequence: playlist.mediaSequence + segmentInfo.mediaIndex,\n          time: Math.min(firstStart, lastStart - segment.duration)\n        };\n      }\n    }\n  }]);\n  return VTTSegmentLoader;\n}(SegmentLoader);\n/**\n * @file ad-cue-tags.js\n */\n\n/**\n * Searches for an ad cue that overlaps with the given mediaTime\n */\n\n\nvar findAdCue = function findAdCue(track, mediaTime) {\n  var cues = track.cues;\n\n  for (var i = 0; i < cues.length; i++) {\n    var cue = cues[i];\n\n    if (mediaTime >= cue.adStartTime && mediaTime <= cue.adEndTime) {\n      return cue;\n    }\n  }\n\n  return null;\n};\n\nvar updateAdCues = function updateAdCues(media, track) {\n  var offset = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;\n\n  if (!media.segments) {\n    return;\n  }\n\n  var mediaTime = offset;\n  var cue = void 0;\n\n  for (var i = 0; i < media.segments.length; i++) {\n    var segment = media.segments[i];\n\n    if (!cue) {\n      // Since the cues will span for at least the segment duration, adding a fudge\n      // factor of half segment duration will prevent duplicate cues from being\n      // created when timing info is not exact (e.g. cue start time initialized\n      // at 10.006677, but next call mediaTime is 10.003332 )\n      cue = findAdCue(track, mediaTime + segment.duration / 2);\n    }\n\n    if (cue) {\n      if ('cueIn' in segment) {\n        // Found a CUE-IN so end the cue\n        cue.endTime = mediaTime;\n        cue.adEndTime = mediaTime;\n        mediaTime += segment.duration;\n        cue = null;\n        continue;\n      }\n\n      if (mediaTime < cue.endTime) {\n        // Already processed this mediaTime for this cue\n        mediaTime += segment.duration;\n        continue;\n      } // otherwise extend cue until a CUE-IN is found\n\n\n      cue.endTime += segment.duration;\n    } else {\n      if ('cueOut' in segment) {\n        cue = new window$1.VTTCue(mediaTime, mediaTime + segment.duration, segment.cueOut);\n        cue.adStartTime = mediaTime; // Assumes tag format to be\n        // #EXT-X-CUE-OUT:30\n\n        cue.adEndTime = mediaTime + parseFloat(segment.cueOut);\n        track.addCue(cue);\n      }\n\n      if ('cueOutCont' in segment) {\n        // Entered into the middle of an ad cue\n        var adOffset = void 0;\n        var adTotal = void 0; // Assumes tag formate to be\n        // #EXT-X-CUE-OUT-CONT:10/30\n\n        var _segment$cueOutCont$s = segment.cueOutCont.split('/').map(parseFloat);\n\n        var _segment$cueOutCont$s2 = slicedToArray(_segment$cueOutCont$s, 2);\n\n        adOffset = _segment$cueOutCont$s2[0];\n        adTotal = _segment$cueOutCont$s2[1];\n        cue = new window$1.VTTCue(mediaTime, mediaTime + segment.duration, '');\n        cue.adStartTime = mediaTime - adOffset;\n        cue.adEndTime = cue.adStartTime + adTotal;\n        track.addCue(cue);\n      }\n    }\n\n    mediaTime += segment.duration;\n  }\n};\n/**\n * @file sync-controller.js\n */\n\n\nvar tsprobe = tsInspector.inspect;\nvar syncPointStrategies = [// Stategy \"VOD\": Handle the VOD-case where the sync-point is *always*\n//                the equivalence display-time 0 === segment-index 0\n{\n  name: 'VOD',\n  run: function run(syncController, playlist, duration$$1, currentTimeline, currentTime) {\n    if (duration$$1 !== Infinity) {\n      var syncPoint = {\n        time: 0,\n        segmentIndex: 0\n      };\n      return syncPoint;\n    }\n\n    return null;\n  }\n}, // Stategy \"ProgramDateTime\": We have a program-date-time tag in this playlist\n{\n  name: 'ProgramDateTime',\n  run: function run(syncController, playlist, duration$$1, currentTimeline, currentTime) {\n    if (!syncController.datetimeToDisplayTime) {\n      return null;\n    }\n\n    var segments = playlist.segments || [];\n    var syncPoint = null;\n    var lastDistance = null;\n    currentTime = currentTime || 0;\n\n    for (var i = 0; i < segments.length; i++) {\n      var segment = segments[i];\n\n      if (segment.dateTimeObject) {\n        var segmentTime = segment.dateTimeObject.getTime() / 1000;\n        var segmentStart = segmentTime + syncController.datetimeToDisplayTime;\n        var distance = Math.abs(currentTime - segmentStart); // Once the distance begins to increase, or if distance is 0, we have passed\n        // currentTime and can stop looking for better candidates\n\n        if (lastDistance !== null && (distance === 0 || lastDistance < distance)) {\n          break;\n        }\n\n        lastDistance = distance;\n        syncPoint = {\n          time: segmentStart,\n          segmentIndex: i\n        };\n      }\n    }\n\n    return syncPoint;\n  }\n}, // Stategy \"Segment\": We have a known time mapping for a timeline and a\n//                    segment in the current timeline with timing data\n{\n  name: 'Segment',\n  run: function run(syncController, playlist, duration$$1, currentTimeline, currentTime) {\n    var segments = playlist.segments || [];\n    var syncPoint = null;\n    var lastDistance = null;\n    currentTime = currentTime || 0;\n\n    for (var i = 0; i < segments.length; i++) {\n      var segment = segments[i];\n\n      if (segment.timeline === currentTimeline && typeof segment.start !== 'undefined') {\n        var distance = Math.abs(currentTime - segment.start); // Once the distance begins to increase, we have passed\n        // currentTime and can stop looking for better candidates\n\n        if (lastDistance !== null && lastDistance < distance) {\n          break;\n        }\n\n        if (!syncPoint || lastDistance === null || lastDistance >= distance) {\n          lastDistance = distance;\n          syncPoint = {\n            time: segment.start,\n            segmentIndex: i\n          };\n        }\n      }\n    }\n\n    return syncPoint;\n  }\n}, // Stategy \"Discontinuity\": We have a discontinuity with a known\n//                          display-time\n{\n  name: 'Discontinuity',\n  run: function run(syncController, playlist, duration$$1, currentTimeline, currentTime) {\n    var syncPoint = null;\n    currentTime = currentTime || 0;\n\n    if (playlist.discontinuityStarts && playlist.discontinuityStarts.length) {\n      var lastDistance = null;\n\n      for (var i = 0; i < playlist.discontinuityStarts.length; i++) {\n        var segmentIndex = playlist.discontinuityStarts[i];\n        var discontinuity = playlist.discontinuitySequence + i + 1;\n        var discontinuitySync = syncController.discontinuities[discontinuity];\n\n        if (discontinuitySync) {\n          var distance = Math.abs(currentTime - discontinuitySync.time); // Once the distance begins to increase, we have passed\n          // currentTime and can stop looking for better candidates\n\n          if (lastDistance !== null && lastDistance < distance) {\n            break;\n          }\n\n          if (!syncPoint || lastDistance === null || lastDistance >= distance) {\n            lastDistance = distance;\n            syncPoint = {\n              time: discontinuitySync.time,\n              segmentIndex: segmentIndex\n            };\n          }\n        }\n      }\n    }\n\n    return syncPoint;\n  }\n}, // Stategy \"Playlist\": We have a playlist with a known mapping of\n//                     segment index to display time\n{\n  name: 'Playlist',\n  run: function run(syncController, playlist, duration$$1, currentTimeline, currentTime) {\n    if (playlist.syncInfo) {\n      var syncPoint = {\n        time: playlist.syncInfo.time,\n        segmentIndex: playlist.syncInfo.mediaSequence - playlist.mediaSequence\n      };\n      return syncPoint;\n    }\n\n    return null;\n  }\n}];\n\nvar SyncController = function (_videojs$EventTarget) {\n  inherits(SyncController, _videojs$EventTarget);\n\n  function SyncController() {\n    classCallCheck(this, SyncController); // Segment Loader state variables...\n    // ...for synching across variants\n\n    var _this = possibleConstructorReturn(this, (SyncController.__proto__ || Object.getPrototypeOf(SyncController)).call(this));\n\n    _this.inspectCache_ = undefined; // ...for synching across variants\n\n    _this.timelines = [];\n    _this.discontinuities = [];\n    _this.datetimeToDisplayTime = null;\n    _this.logger_ = logger('SyncController');\n    return _this;\n  }\n  /**\n   * Find a sync-point for the playlist specified\n   *\n   * A sync-point is defined as a known mapping from display-time to\n   * a segment-index in the current playlist.\n   *\n   * @param {Playlist} playlist\n   *        The playlist that needs a sync-point\n   * @param {Number} duration\n   *        Duration of the MediaSource (Infinite if playing a live source)\n   * @param {Number} currentTimeline\n   *        The last timeline from which a segment was loaded\n   * @returns {Object}\n   *          A sync-point object\n   */\n\n\n  createClass(SyncController, [{\n    key: 'getSyncPoint',\n    value: function getSyncPoint(playlist, duration$$1, currentTimeline, currentTime) {\n      var syncPoints = this.runStrategies_(playlist, duration$$1, currentTimeline, currentTime);\n\n      if (!syncPoints.length) {\n        // Signal that we need to attempt to get a sync-point manually\n        // by fetching a segment in the playlist and constructing\n        // a sync-point from that information\n        return null;\n      } // Now find the sync-point that is closest to the currentTime because\n      // that should result in the most accurate guess about which segment\n      // to fetch\n\n\n      return this.selectSyncPoint_(syncPoints, {\n        key: 'time',\n        value: currentTime\n      });\n    }\n    /**\n     * Calculate the amount of time that has expired off the playlist during playback\n     *\n     * @param {Playlist} playlist\n     *        Playlist object to calculate expired from\n     * @param {Number} duration\n     *        Duration of the MediaSource (Infinity if playling a live source)\n     * @returns {Number|null}\n     *          The amount of time that has expired off the playlist during playback. Null\n     *          if no sync-points for the playlist can be found.\n     */\n\n  }, {\n    key: 'getExpiredTime',\n    value: function getExpiredTime(playlist, duration$$1) {\n      if (!playlist || !playlist.segments) {\n        return null;\n      }\n\n      var syncPoints = this.runStrategies_(playlist, duration$$1, playlist.discontinuitySequence, 0); // Without sync-points, there is not enough information to determine the expired time\n\n      if (!syncPoints.length) {\n        return null;\n      }\n\n      var syncPoint = this.selectSyncPoint_(syncPoints, {\n        key: 'segmentIndex',\n        value: 0\n      }); // If the sync-point is beyond the start of the playlist, we want to subtract the\n      // duration from index 0 to syncPoint.segmentIndex instead of adding.\n\n      if (syncPoint.segmentIndex > 0) {\n        syncPoint.time *= -1;\n      }\n\n      return Math.abs(syncPoint.time + sumDurations(playlist, syncPoint.segmentIndex, 0));\n    }\n    /**\n     * Runs each sync-point strategy and returns a list of sync-points returned by the\n     * strategies\n     *\n     * @private\n     * @param {Playlist} playlist\n     *        The playlist that needs a sync-point\n     * @param {Number} duration\n     *        Duration of the MediaSource (Infinity if playing a live source)\n     * @param {Number} currentTimeline\n     *        The last timeline from which a segment was loaded\n     * @returns {Array}\n     *          A list of sync-point objects\n     */\n\n  }, {\n    key: 'runStrategies_',\n    value: function runStrategies_(playlist, duration$$1, currentTimeline, currentTime) {\n      var syncPoints = []; // Try to find a sync-point in by utilizing various strategies...\n\n      for (var i = 0; i < syncPointStrategies.length; i++) {\n        var strategy = syncPointStrategies[i];\n        var syncPoint = strategy.run(this, playlist, duration$$1, currentTimeline, currentTime);\n\n        if (syncPoint) {\n          syncPoint.strategy = strategy.name;\n          syncPoints.push({\n            strategy: strategy.name,\n            syncPoint: syncPoint\n          });\n        }\n      }\n\n      return syncPoints;\n    }\n    /**\n     * Selects the sync-point nearest the specified target\n     *\n     * @private\n     * @param {Array} syncPoints\n     *        List of sync-points to select from\n     * @param {Object} target\n     *        Object specifying the property and value we are targeting\n     * @param {String} target.key\n     *        Specifies the property to target. Must be either 'time' or 'segmentIndex'\n     * @param {Number} target.value\n     *        The value to target for the specified key.\n     * @returns {Object}\n     *          The sync-point nearest the target\n     */\n\n  }, {\n    key: 'selectSyncPoint_',\n    value: function selectSyncPoint_(syncPoints, target) {\n      var bestSyncPoint = syncPoints[0].syncPoint;\n      var bestDistance = Math.abs(syncPoints[0].syncPoint[target.key] - target.value);\n      var bestStrategy = syncPoints[0].strategy;\n\n      for (var i = 1; i < syncPoints.length; i++) {\n        var newDistance = Math.abs(syncPoints[i].syncPoint[target.key] - target.value);\n\n        if (newDistance < bestDistance) {\n          bestDistance = newDistance;\n          bestSyncPoint = syncPoints[i].syncPoint;\n          bestStrategy = syncPoints[i].strategy;\n        }\n      }\n\n      this.logger_('syncPoint for [' + target.key + ': ' + target.value + '] chosen with strategy' + (' [' + bestStrategy + ']: [time:' + bestSyncPoint.time + ',') + (' segmentIndex:' + bestSyncPoint.segmentIndex + ']'));\n      return bestSyncPoint;\n    }\n    /**\n     * Save any meta-data present on the segments when segments leave\n     * the live window to the playlist to allow for synchronization at the\n     * playlist level later.\n     *\n     * @param {Playlist} oldPlaylist - The previous active playlist\n     * @param {Playlist} newPlaylist - The updated and most current playlist\n     */\n\n  }, {\n    key: 'saveExpiredSegmentInfo',\n    value: function saveExpiredSegmentInfo(oldPlaylist, newPlaylist) {\n      var mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence; // When a segment expires from the playlist and it has a start time\n      // save that information as a possible sync-point reference in future\n\n      for (var i = mediaSequenceDiff - 1; i >= 0; i--) {\n        var lastRemovedSegment = oldPlaylist.segments[i];\n\n        if (lastRemovedSegment && typeof lastRemovedSegment.start !== 'undefined') {\n          newPlaylist.syncInfo = {\n            mediaSequence: oldPlaylist.mediaSequence + i,\n            time: lastRemovedSegment.start\n          };\n          this.logger_('playlist refresh sync: [time:' + newPlaylist.syncInfo.time + ',' + (' mediaSequence: ' + newPlaylist.syncInfo.mediaSequence + ']'));\n          this.trigger('syncinfoupdate');\n          break;\n        }\n      }\n    }\n    /**\n     * Save the mapping from playlist's ProgramDateTime to display. This should\n     * only ever happen once at the start of playback.\n     *\n     * @param {Playlist} playlist - The currently active playlist\n     */\n\n  }, {\n    key: 'setDateTimeMapping',\n    value: function setDateTimeMapping(playlist) {\n      if (!this.datetimeToDisplayTime && playlist.segments && playlist.segments.length && playlist.segments[0].dateTimeObject) {\n        var playlistTimestamp = playlist.segments[0].dateTimeObject.getTime() / 1000;\n        this.datetimeToDisplayTime = -playlistTimestamp;\n      }\n    }\n    /**\n     * Reset the state of the inspection cache when we do a rendition\n     * switch\n     */\n\n  }, {\n    key: 'reset',\n    value: function reset() {\n      this.inspectCache_ = undefined;\n    }\n    /**\n     * Probe or inspect a fmp4 or an mpeg2-ts segment to determine the start\n     * and end of the segment in it's internal \"media time\". Used to generate\n     * mappings from that internal \"media time\" to the display time that is\n     * shown on the player.\n     *\n     * @param {SegmentInfo} segmentInfo - The current active request information\n     */\n\n  }, {\n    key: 'probeSegmentInfo',\n    value: function probeSegmentInfo(segmentInfo) {\n      var segment = segmentInfo.segment;\n      var playlist = segmentInfo.playlist;\n      var timingInfo = void 0;\n\n      if (segment.map) {\n        timingInfo = this.probeMp4Segment_(segmentInfo);\n      } else {\n        timingInfo = this.probeTsSegment_(segmentInfo);\n      }\n\n      if (timingInfo) {\n        if (this.calculateSegmentTimeMapping_(segmentInfo, timingInfo)) {\n          this.saveDiscontinuitySyncInfo_(segmentInfo); // If the playlist does not have sync information yet, record that information\n          // now with segment timing information\n\n          if (!playlist.syncInfo) {\n            playlist.syncInfo = {\n              mediaSequence: playlist.mediaSequence + segmentInfo.mediaIndex,\n              time: segment.start\n            };\n          }\n        }\n      }\n\n      return timingInfo;\n    }\n    /**\n     * Probe an fmp4 or an mpeg2-ts segment to determine the start of the segment\n     * in it's internal \"media time\".\n     *\n     * @private\n     * @param {SegmentInfo} segmentInfo - The current active request information\n     * @return {object} The start and end time of the current segment in \"media time\"\n     */\n\n  }, {\n    key: 'probeMp4Segment_',\n    value: function probeMp4Segment_(segmentInfo) {\n      var segment = segmentInfo.segment;\n      var timescales = mp4probe.timescale(segment.map.bytes);\n      var startTime = mp4probe.startTime(timescales, segmentInfo.bytes);\n\n      if (segmentInfo.timestampOffset !== null) {\n        segmentInfo.timestampOffset -= startTime;\n      }\n\n      return {\n        start: startTime,\n        end: startTime + segment.duration\n      };\n    }\n    /**\n     * Probe an mpeg2-ts segment to determine the start and end of the segment\n     * in it's internal \"media time\".\n     *\n     * @private\n     * @param {SegmentInfo} segmentInfo - The current active request information\n     * @return {object} The start and end time of the current segment in \"media time\"\n     */\n\n  }, {\n    key: 'probeTsSegment_',\n    value: function probeTsSegment_(segmentInfo) {\n      var timeInfo = tsprobe(segmentInfo.bytes, this.inspectCache_);\n      var segmentStartTime = void 0;\n      var segmentEndTime = void 0;\n      var segmentTimestampInfo = void 0;\n\n      if (!timeInfo) {\n        return null;\n      }\n\n      if (timeInfo.video && timeInfo.video.length === 2) {\n        this.inspectCache_ = timeInfo.video[1].dts;\n        segmentStartTime = timeInfo.video[0].dtsTime;\n        segmentEndTime = timeInfo.video[1].dtsTime;\n        segmentTimestampInfo = timeInfo.video;\n      } else if (timeInfo.audio && timeInfo.audio.length === 2) {\n        this.inspectCache_ = timeInfo.audio[1].dts;\n        segmentStartTime = timeInfo.audio[0].dtsTime;\n        segmentEndTime = timeInfo.audio[1].dtsTime;\n        segmentTimestampInfo = timeInfo.audio;\n      }\n\n      var probedInfo = {\n        segmentTimestampInfo: segmentTimestampInfo,\n        start: segmentStartTime,\n        end: segmentEndTime,\n        containsVideo: timeInfo.video && timeInfo.video.length === 2,\n        containsAudio: timeInfo.audio && timeInfo.audio.length === 2\n      };\n      return probedInfo;\n    }\n  }, {\n    key: 'timestampOffsetForTimeline',\n    value: function timestampOffsetForTimeline(timeline) {\n      if (typeof this.timelines[timeline] === 'undefined') {\n        return null;\n      }\n\n      return this.timelines[timeline].time;\n    }\n  }, {\n    key: 'mappingForTimeline',\n    value: function mappingForTimeline(timeline) {\n      if (typeof this.timelines[timeline] === 'undefined') {\n        return null;\n      }\n\n      return this.timelines[timeline].mapping;\n    }\n    /**\n     * Use the \"media time\" for a segment to generate a mapping to \"display time\" and\n     * save that display time to the segment.\n     *\n     * @private\n     * @param {SegmentInfo} segmentInfo\n     *        The current active request information\n     * @param {object} timingInfo\n     *        The start and end time of the current segment in \"media time\"\n     * @returns {Boolean}\n     *          Returns false if segment time mapping could not be calculated\n     */\n\n  }, {\n    key: 'calculateSegmentTimeMapping_',\n    value: function calculateSegmentTimeMapping_(segmentInfo, timingInfo) {\n      var segment = segmentInfo.segment;\n      var mappingObj = this.timelines[segmentInfo.timeline];\n\n      if (segmentInfo.timestampOffset !== null) {\n        mappingObj = {\n          time: segmentInfo.startOfSegment,\n          mapping: segmentInfo.startOfSegment - timingInfo.start\n        };\n        this.timelines[segmentInfo.timeline] = mappingObj;\n        this.trigger('timestampoffset');\n        this.logger_('time mapping for timeline ' + segmentInfo.timeline + ': ' + ('[time: ' + mappingObj.time + '] [mapping: ' + mappingObj.mapping + ']'));\n        segment.start = segmentInfo.startOfSegment;\n        segment.end = timingInfo.end + mappingObj.mapping;\n      } else if (mappingObj) {\n        segment.start = timingInfo.start + mappingObj.mapping;\n        segment.end = timingInfo.end + mappingObj.mapping;\n      } else {\n        return false;\n      }\n\n      return true;\n    }\n    /**\n     * Each time we have discontinuity in the playlist, attempt to calculate the location\n     * in display of the start of the discontinuity and save that. We also save an accuracy\n     * value so that we save values with the most accuracy (closest to 0.)\n     *\n     * @private\n     * @param {SegmentInfo} segmentInfo - The current active request information\n     */\n\n  }, {\n    key: 'saveDiscontinuitySyncInfo_',\n    value: function saveDiscontinuitySyncInfo_(segmentInfo) {\n      var playlist = segmentInfo.playlist;\n      var segment = segmentInfo.segment; // If the current segment is a discontinuity then we know exactly where\n      // the start of the range and it's accuracy is 0 (greater accuracy values\n      // mean more approximation)\n\n      if (segment.discontinuity) {\n        this.discontinuities[segment.timeline] = {\n          time: segment.start,\n          accuracy: 0\n        };\n      } else if (playlist.discontinuityStarts && playlist.discontinuityStarts.length) {\n        // Search for future discontinuities that we can provide better timing\n        // information for and save that information for sync purposes\n        for (var i = 0; i < playlist.discontinuityStarts.length; i++) {\n          var segmentIndex = playlist.discontinuityStarts[i];\n          var discontinuity = playlist.discontinuitySequence + i + 1;\n          var mediaIndexDiff = segmentIndex - segmentInfo.mediaIndex;\n          var accuracy = Math.abs(mediaIndexDiff);\n\n          if (!this.discontinuities[discontinuity] || this.discontinuities[discontinuity].accuracy > accuracy) {\n            var time = void 0;\n\n            if (mediaIndexDiff < 0) {\n              time = segment.start - sumDurations(playlist, segmentInfo.mediaIndex, segmentIndex);\n            } else {\n              time = segment.end + sumDurations(playlist, segmentInfo.mediaIndex + 1, segmentIndex);\n            }\n\n            this.discontinuities[discontinuity] = {\n              time: time,\n              accuracy: accuracy\n            };\n          }\n        }\n      }\n    }\n  }]);\n  return SyncController;\n}(videojs$1.EventTarget);\n\nvar Decrypter$1 = new shimWorker(\"./decrypter-worker.worker.js\", function (window, document$$1) {\n  var self = this;\n\n  var decrypterWorker = function () {\n    /*\n     * pkcs7.pad\n     * https://github.com/brightcove/pkcs7\n     *\n     * Copyright (c) 2014 Brightcove\n     * Licensed under the apache2 license.\n     */\n\n    /**\n     * Returns the subarray of a Uint8Array without PKCS#7 padding.\n     * @param padded {Uint8Array} unencrypted bytes that have been padded\n     * @return {Uint8Array} the unpadded bytes\n     * @see http://tools.ietf.org/html/rfc5652\n     */\n    function unpad(padded) {\n      return padded.subarray(0, padded.byteLength - padded[padded.byteLength - 1]);\n    }\n\n    var classCallCheck = function classCallCheck(instance, Constructor) {\n      if (!(instance instanceof Constructor)) {\n        throw new TypeError(\"Cannot call a class as a function\");\n      }\n    };\n\n    var createClass = function () {\n      function defineProperties(target, props) {\n        for (var i = 0; i < props.length; i++) {\n          var descriptor = props[i];\n          descriptor.enumerable = descriptor.enumerable || false;\n          descriptor.configurable = true;\n          if (\"value\" in descriptor) descriptor.writable = true;\n          Object.defineProperty(target, descriptor.key, descriptor);\n        }\n      }\n\n      return function (Constructor, protoProps, staticProps) {\n        if (protoProps) defineProperties(Constructor.prototype, protoProps);\n        if (staticProps) defineProperties(Constructor, staticProps);\n        return Constructor;\n      };\n    }();\n\n    var inherits = function inherits(subClass, superClass) {\n      if (typeof superClass !== \"function\" && superClass !== null) {\n        throw new TypeError(\"Super expression must either be null or a function, not \" + typeof superClass);\n      }\n\n      subClass.prototype = Object.create(superClass && superClass.prototype, {\n        constructor: {\n          value: subClass,\n          enumerable: false,\n          writable: true,\n          configurable: true\n        }\n      });\n      if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;\n    };\n\n    var possibleConstructorReturn = function possibleConstructorReturn(self, call) {\n      if (!self) {\n        throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n      }\n\n      return call && (typeof call === \"object\" || typeof call === \"function\") ? call : self;\n    };\n    /**\n     * @file aes.js\n     *\n     * This file contains an adaptation of the AES decryption algorithm\n     * from the Standford Javascript Cryptography Library. That work is\n     * covered by the following copyright and permissions notice:\n     *\n     * Copyright 2009-2010 Emily Stark, Mike Hamburg, Dan Boneh.\n     * All rights reserved.\n     *\n     * Redistribution and use in source and binary forms, with or without\n     * modification, are permitted provided that the following conditions are\n     * met:\n     *\n     * 1. Redistributions of source code must retain the above copyright\n     *    notice, this list of conditions and the following disclaimer.\n     *\n     * 2. Redistributions in binary form must reproduce the above\n     *    copyright notice, this list of conditions and the following\n     *    disclaimer in the documentation and/or other materials provided\n     *    with the distribution.\n     *\n     * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR\n     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\n     * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\n     * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR CONTRIBUTORS BE\n     * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\n     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\n     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR\n     * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,\n     * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE\n     * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN\n     * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n     *\n     * The views and conclusions contained in the software and documentation\n     * are those of the authors and should not be interpreted as representing\n     * official policies, either expressed or implied, of the authors.\n     */\n\n    /**\n     * Expand the S-box tables.\n     *\n     * @private\n     */\n\n\n    var precompute = function precompute() {\n      var tables = [[[], [], [], [], []], [[], [], [], [], []]];\n      var encTable = tables[0];\n      var decTable = tables[1];\n      var sbox = encTable[4];\n      var sboxInv = decTable[4];\n      var i = void 0;\n      var x = void 0;\n      var xInv = void 0;\n      var d = [];\n      var th = [];\n      var x2 = void 0;\n      var x4 = void 0;\n      var x8 = void 0;\n      var s = void 0;\n      var tEnc = void 0;\n      var tDec = void 0; // Compute double and third tables\n\n      for (i = 0; i < 256; i++) {\n        th[(d[i] = i << 1 ^ (i >> 7) * 283) ^ i] = i;\n      }\n\n      for (x = xInv = 0; !sbox[x]; x ^= x2 || 1, xInv = th[xInv] || 1) {\n        // Compute sbox\n        s = xInv ^ xInv << 1 ^ xInv << 2 ^ xInv << 3 ^ xInv << 4;\n        s = s >> 8 ^ s & 255 ^ 99;\n        sbox[x] = s;\n        sboxInv[s] = x; // Compute MixColumns\n\n        x8 = d[x4 = d[x2 = d[x]]];\n        tDec = x8 * 0x1010101 ^ x4 * 0x10001 ^ x2 * 0x101 ^ x * 0x1010100;\n        tEnc = d[s] * 0x101 ^ s * 0x1010100;\n\n        for (i = 0; i < 4; i++) {\n          encTable[i][x] = tEnc = tEnc << 24 ^ tEnc >>> 8;\n          decTable[i][s] = tDec = tDec << 24 ^ tDec >>> 8;\n        }\n      } // Compactify. Considerable speedup on Firefox.\n\n\n      for (i = 0; i < 5; i++) {\n        encTable[i] = encTable[i].slice(0);\n        decTable[i] = decTable[i].slice(0);\n      }\n\n      return tables;\n    };\n\n    var aesTables = null;\n    /**\n     * Schedule out an AES key for both encryption and decryption. This\n     * is a low-level class. Use a cipher mode to do bulk encryption.\n     *\n     * @class AES\n     * @param key {Array} The key as an array of 4, 6 or 8 words.\n     */\n\n    var AES = function () {\n      function AES(key) {\n        classCallCheck(this, AES);\n        /**\n         * The expanded S-box and inverse S-box tables. These will be computed\n         * on the client so that we don't have to send them down the wire.\n         *\n         * There are two tables, _tables[0] is for encryption and\n         * _tables[1] is for decryption.\n         *\n         * The first 4 sub-tables are the expanded S-box with MixColumns. The\n         * last (_tables[01][4]) is the S-box itself.\n         *\n         * @private\n         */\n        // if we have yet to precompute the S-box tables\n        // do so now\n\n        if (!aesTables) {\n          aesTables = precompute();\n        } // then make a copy of that object for use\n\n\n        this._tables = [[aesTables[0][0].slice(), aesTables[0][1].slice(), aesTables[0][2].slice(), aesTables[0][3].slice(), aesTables[0][4].slice()], [aesTables[1][0].slice(), aesTables[1][1].slice(), aesTables[1][2].slice(), aesTables[1][3].slice(), aesTables[1][4].slice()]];\n        var i = void 0;\n        var j = void 0;\n        var tmp = void 0;\n        var encKey = void 0;\n        var decKey = void 0;\n        var sbox = this._tables[0][4];\n        var decTable = this._tables[1];\n        var keyLen = key.length;\n        var rcon = 1;\n\n        if (keyLen !== 4 && keyLen !== 6 && keyLen !== 8) {\n          throw new Error('Invalid aes key size');\n        }\n\n        encKey = key.slice(0);\n        decKey = [];\n        this._key = [encKey, decKey]; // schedule encryption keys\n\n        for (i = keyLen; i < 4 * keyLen + 28; i++) {\n          tmp = encKey[i - 1]; // apply sbox\n\n          if (i % keyLen === 0 || keyLen === 8 && i % keyLen === 4) {\n            tmp = sbox[tmp >>> 24] << 24 ^ sbox[tmp >> 16 & 255] << 16 ^ sbox[tmp >> 8 & 255] << 8 ^ sbox[tmp & 255]; // shift rows and add rcon\n\n            if (i % keyLen === 0) {\n              tmp = tmp << 8 ^ tmp >>> 24 ^ rcon << 24;\n              rcon = rcon << 1 ^ (rcon >> 7) * 283;\n            }\n          }\n\n          encKey[i] = encKey[i - keyLen] ^ tmp;\n        } // schedule decryption keys\n\n\n        for (j = 0; i; j++, i--) {\n          tmp = encKey[j & 3 ? i : i - 4];\n\n          if (i <= 4 || j < 4) {\n            decKey[j] = tmp;\n          } else {\n            decKey[j] = decTable[0][sbox[tmp >>> 24]] ^ decTable[1][sbox[tmp >> 16 & 255]] ^ decTable[2][sbox[tmp >> 8 & 255]] ^ decTable[3][sbox[tmp & 255]];\n          }\n        }\n      }\n      /**\n       * Decrypt 16 bytes, specified as four 32-bit words.\n       *\n       * @param {Number} encrypted0 the first word to decrypt\n       * @param {Number} encrypted1 the second word to decrypt\n       * @param {Number} encrypted2 the third word to decrypt\n       * @param {Number} encrypted3 the fourth word to decrypt\n       * @param {Int32Array} out the array to write the decrypted words\n       * into\n       * @param {Number} offset the offset into the output array to start\n       * writing results\n       * @return {Array} The plaintext.\n       */\n\n\n      AES.prototype.decrypt = function decrypt$$1(encrypted0, encrypted1, encrypted2, encrypted3, out, offset) {\n        var key = this._key[1]; // state variables a,b,c,d are loaded with pre-whitened data\n\n        var a = encrypted0 ^ key[0];\n        var b = encrypted3 ^ key[1];\n        var c = encrypted2 ^ key[2];\n        var d = encrypted1 ^ key[3];\n        var a2 = void 0;\n        var b2 = void 0;\n        var c2 = void 0; // key.length === 2 ?\n\n        var nInnerRounds = key.length / 4 - 2;\n        var i = void 0;\n        var kIndex = 4;\n        var table = this._tables[1]; // load up the tables\n\n        var table0 = table[0];\n        var table1 = table[1];\n        var table2 = table[2];\n        var table3 = table[3];\n        var sbox = table[4]; // Inner rounds. Cribbed from OpenSSL.\n\n        for (i = 0; i < nInnerRounds; i++) {\n          a2 = table0[a >>> 24] ^ table1[b >> 16 & 255] ^ table2[c >> 8 & 255] ^ table3[d & 255] ^ key[kIndex];\n          b2 = table0[b >>> 24] ^ table1[c >> 16 & 255] ^ table2[d >> 8 & 255] ^ table3[a & 255] ^ key[kIndex + 1];\n          c2 = table0[c >>> 24] ^ table1[d >> 16 & 255] ^ table2[a >> 8 & 255] ^ table3[b & 255] ^ key[kIndex + 2];\n          d = table0[d >>> 24] ^ table1[a >> 16 & 255] ^ table2[b >> 8 & 255] ^ table3[c & 255] ^ key[kIndex + 3];\n          kIndex += 4;\n          a = a2;\n          b = b2;\n          c = c2;\n        } // Last round.\n\n\n        for (i = 0; i < 4; i++) {\n          out[(3 & -i) + offset] = sbox[a >>> 24] << 24 ^ sbox[b >> 16 & 255] << 16 ^ sbox[c >> 8 & 255] << 8 ^ sbox[d & 255] ^ key[kIndex++];\n          a2 = a;\n          a = b;\n          b = c;\n          c = d;\n          d = a2;\n        }\n      };\n\n      return AES;\n    }();\n    /**\n     * @file stream.js\n     */\n\n    /**\n     * A lightweight readable stream implemention that handles event dispatching.\n     *\n     * @class Stream\n     */\n\n\n    var Stream = function () {\n      function Stream() {\n        classCallCheck(this, Stream);\n        this.listeners = {};\n      }\n      /**\n       * Add a listener for a specified event type.\n       *\n       * @param {String} type the event name\n       * @param {Function} listener the callback to be invoked when an event of\n       * the specified type occurs\n       */\n\n\n      Stream.prototype.on = function on(type, listener) {\n        if (!this.listeners[type]) {\n          this.listeners[type] = [];\n        }\n\n        this.listeners[type].push(listener);\n      };\n      /**\n       * Remove a listener for a specified event type.\n       *\n       * @param {String} type the event name\n       * @param {Function} listener  a function previously registered for this\n       * type of event through `on`\n       * @return {Boolean} if we could turn it off or not\n       */\n\n\n      Stream.prototype.off = function off(type, listener) {\n        if (!this.listeners[type]) {\n          return false;\n        }\n\n        var index = this.listeners[type].indexOf(listener);\n        this.listeners[type].splice(index, 1);\n        return index > -1;\n      };\n      /**\n       * Trigger an event of the specified type on this stream. Any additional\n       * arguments to this function are passed as parameters to event listeners.\n       *\n       * @param {String} type the event name\n       */\n\n\n      Stream.prototype.trigger = function trigger(type) {\n        var callbacks = this.listeners[type];\n\n        if (!callbacks) {\n          return;\n        } // Slicing the arguments on every invocation of this method\n        // can add a significant amount of overhead. Avoid the\n        // intermediate object creation for the common case of a\n        // single callback argument\n\n\n        if (arguments.length === 2) {\n          var length = callbacks.length;\n\n          for (var i = 0; i < length; ++i) {\n            callbacks[i].call(this, arguments[1]);\n          }\n        } else {\n          var args = Array.prototype.slice.call(arguments, 1);\n          var _length = callbacks.length;\n\n          for (var _i = 0; _i < _length; ++_i) {\n            callbacks[_i].apply(this, args);\n          }\n        }\n      };\n      /**\n       * Destroys the stream and cleans up.\n       */\n\n\n      Stream.prototype.dispose = function dispose() {\n        this.listeners = {};\n      };\n      /**\n       * Forwards all `data` events on this stream to the destination stream. The\n       * destination stream should provide a method `push` to receive the data\n       * events as they arrive.\n       *\n       * @param {Stream} destination the stream that will receive all `data` events\n       * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n       */\n\n\n      Stream.prototype.pipe = function pipe(destination) {\n        this.on('data', function (data) {\n          destination.push(data);\n        });\n      };\n\n      return Stream;\n    }();\n    /**\n     * @file async-stream.js\n     */\n\n    /**\n     * A wrapper around the Stream class to use setTiemout\n     * and run stream \"jobs\" Asynchronously\n     *\n     * @class AsyncStream\n     * @extends Stream\n     */\n\n\n    var AsyncStream$$1 = function (_Stream) {\n      inherits(AsyncStream$$1, _Stream);\n\n      function AsyncStream$$1() {\n        classCallCheck(this, AsyncStream$$1);\n\n        var _this = possibleConstructorReturn(this, _Stream.call(this, Stream));\n\n        _this.jobs = [];\n        _this.delay = 1;\n        _this.timeout_ = null;\n        return _this;\n      }\n      /**\n       * process an async job\n       *\n       * @private\n       */\n\n\n      AsyncStream$$1.prototype.processJob_ = function processJob_() {\n        this.jobs.shift()();\n\n        if (this.jobs.length) {\n          this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);\n        } else {\n          this.timeout_ = null;\n        }\n      };\n      /**\n       * push a job into the stream\n       *\n       * @param {Function} job the job to push into the stream\n       */\n\n\n      AsyncStream$$1.prototype.push = function push(job) {\n        this.jobs.push(job);\n\n        if (!this.timeout_) {\n          this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);\n        }\n      };\n\n      return AsyncStream$$1;\n    }(Stream);\n    /**\n     * @file decrypter.js\n     *\n     * An asynchronous implementation of AES-128 CBC decryption with\n     * PKCS#7 padding.\n     */\n\n    /**\n     * Convert network-order (big-endian) bytes into their little-endian\n     * representation.\n     */\n\n\n    var ntoh = function ntoh(word) {\n      return word << 24 | (word & 0xff00) << 8 | (word & 0xff0000) >> 8 | word >>> 24;\n    };\n    /**\n     * Decrypt bytes using AES-128 with CBC and PKCS#7 padding.\n     *\n     * @param {Uint8Array} encrypted the encrypted bytes\n     * @param {Uint32Array} key the bytes of the decryption key\n     * @param {Uint32Array} initVector the initialization vector (IV) to\n     * use for the first round of CBC.\n     * @return {Uint8Array} the decrypted bytes\n     *\n     * @see http://en.wikipedia.org/wiki/Advanced_Encryption_Standard\n     * @see http://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Cipher_Block_Chaining_.28CBC.29\n     * @see https://tools.ietf.org/html/rfc2315\n     */\n\n\n    var decrypt$$1 = function decrypt$$1(encrypted, key, initVector) {\n      // word-level access to the encrypted bytes\n      var encrypted32 = new Int32Array(encrypted.buffer, encrypted.byteOffset, encrypted.byteLength >> 2);\n      var decipher = new AES(Array.prototype.slice.call(key)); // byte and word-level access for the decrypted output\n\n      var decrypted = new Uint8Array(encrypted.byteLength);\n      var decrypted32 = new Int32Array(decrypted.buffer); // temporary variables for working with the IV, encrypted, and\n      // decrypted data\n\n      var init0 = void 0;\n      var init1 = void 0;\n      var init2 = void 0;\n      var init3 = void 0;\n      var encrypted0 = void 0;\n      var encrypted1 = void 0;\n      var encrypted2 = void 0;\n      var encrypted3 = void 0; // iteration variable\n\n      var wordIx = void 0; // pull out the words of the IV to ensure we don't modify the\n      // passed-in reference and easier access\n\n      init0 = initVector[0];\n      init1 = initVector[1];\n      init2 = initVector[2];\n      init3 = initVector[3]; // decrypt four word sequences, applying cipher-block chaining (CBC)\n      // to each decrypted block\n\n      for (wordIx = 0; wordIx < encrypted32.length; wordIx += 4) {\n        // convert big-endian (network order) words into little-endian\n        // (javascript order)\n        encrypted0 = ntoh(encrypted32[wordIx]);\n        encrypted1 = ntoh(encrypted32[wordIx + 1]);\n        encrypted2 = ntoh(encrypted32[wordIx + 2]);\n        encrypted3 = ntoh(encrypted32[wordIx + 3]); // decrypt the block\n\n        decipher.decrypt(encrypted0, encrypted1, encrypted2, encrypted3, decrypted32, wordIx); // XOR with the IV, and restore network byte-order to obtain the\n        // plaintext\n\n        decrypted32[wordIx] = ntoh(decrypted32[wordIx] ^ init0);\n        decrypted32[wordIx + 1] = ntoh(decrypted32[wordIx + 1] ^ init1);\n        decrypted32[wordIx + 2] = ntoh(decrypted32[wordIx + 2] ^ init2);\n        decrypted32[wordIx + 3] = ntoh(decrypted32[wordIx + 3] ^ init3); // setup the IV for the next round\n\n        init0 = encrypted0;\n        init1 = encrypted1;\n        init2 = encrypted2;\n        init3 = encrypted3;\n      }\n\n      return decrypted;\n    };\n    /**\n     * The `Decrypter` class that manages decryption of AES\n     * data through `AsyncStream` objects and the `decrypt`\n     * function\n     *\n     * @param {Uint8Array} encrypted the encrypted bytes\n     * @param {Uint32Array} key the bytes of the decryption key\n     * @param {Uint32Array} initVector the initialization vector (IV) to\n     * @param {Function} done the function to run when done\n     * @class Decrypter\n     */\n\n\n    var Decrypter$$1 = function () {\n      function Decrypter$$1(encrypted, key, initVector, done) {\n        classCallCheck(this, Decrypter$$1);\n        var step = Decrypter$$1.STEP;\n        var encrypted32 = new Int32Array(encrypted.buffer);\n        var decrypted = new Uint8Array(encrypted.byteLength);\n        var i = 0;\n        this.asyncStream_ = new AsyncStream$$1(); // split up the encryption job and do the individual chunks asynchronously\n\n        this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));\n\n        for (i = step; i < encrypted32.length; i += step) {\n          initVector = new Uint32Array([ntoh(encrypted32[i - 4]), ntoh(encrypted32[i - 3]), ntoh(encrypted32[i - 2]), ntoh(encrypted32[i - 1])]);\n          this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));\n        } // invoke the done() callback when everything is finished\n\n\n        this.asyncStream_.push(function () {\n          // remove pkcs#7 padding from the decrypted bytes\n          done(null, unpad(decrypted));\n        });\n      }\n      /**\n       * a getter for step the maximum number of bytes to process at one time\n       *\n       * @return {Number} the value of step 32000\n       */\n\n      /**\n       * @private\n       */\n\n\n      Decrypter$$1.prototype.decryptChunk_ = function decryptChunk_(encrypted, key, initVector, decrypted) {\n        return function () {\n          var bytes = decrypt$$1(encrypted, key, initVector);\n          decrypted.set(bytes, encrypted.byteOffset);\n        };\n      };\n\n      createClass(Decrypter$$1, null, [{\n        key: 'STEP',\n        get: function get$$1() {\n          // 4 * 8000;\n          return 32000;\n        }\n      }]);\n      return Decrypter$$1;\n    }();\n    /**\n     * @file bin-utils.js\n     */\n\n    /**\n     * Creates an object for sending to a web worker modifying properties that are TypedArrays\n     * into a new object with seperated properties for the buffer, byteOffset, and byteLength.\n     *\n     * @param {Object} message\n     *        Object of properties and values to send to the web worker\n     * @return {Object}\n     *         Modified message with TypedArray values expanded\n     * @function createTransferableMessage\n     */\n\n\n    var createTransferableMessage = function createTransferableMessage(message) {\n      var transferable = {};\n      Object.keys(message).forEach(function (key) {\n        var value = message[key];\n\n        if (ArrayBuffer.isView(value)) {\n          transferable[key] = {\n            bytes: value.buffer,\n            byteOffset: value.byteOffset,\n            byteLength: value.byteLength\n          };\n        } else {\n          transferable[key] = value;\n        }\n      });\n      return transferable;\n    };\n    /**\n     * Our web worker interface so that things can talk to aes-decrypter\n     * that will be running in a web worker. the scope is passed to this by\n     * webworkify.\n     *\n     * @param {Object} self\n     *        the scope for the web worker\n     */\n\n\n    var DecrypterWorker = function DecrypterWorker(self) {\n      self.onmessage = function (event) {\n        var data = event.data;\n        var encrypted = new Uint8Array(data.encrypted.bytes, data.encrypted.byteOffset, data.encrypted.byteLength);\n        var key = new Uint32Array(data.key.bytes, data.key.byteOffset, data.key.byteLength / 4);\n        var iv = new Uint32Array(data.iv.bytes, data.iv.byteOffset, data.iv.byteLength / 4);\n        /* eslint-disable no-new, handle-callback-err */\n\n        new Decrypter$$1(encrypted, key, iv, function (err, bytes) {\n          self.postMessage(createTransferableMessage({\n            source: data.source,\n            decrypted: bytes\n          }), [bytes.buffer]);\n        });\n        /* eslint-enable */\n      };\n    };\n\n    var decrypterWorker = new DecrypterWorker(self);\n    return decrypterWorker;\n  }();\n});\n/**\n * Convert the properties of an HLS track into an audioTrackKind.\n *\n * @private\n */\n\nvar audioTrackKind_ = function audioTrackKind_(properties) {\n  var kind = properties[\"default\"] ? 'main' : 'alternative';\n\n  if (properties.characteristics && properties.characteristics.indexOf('public.accessibility.describes-video') >= 0) {\n    kind = 'main-desc';\n  }\n\n  return kind;\n};\n/**\n * Pause provided segment loader and playlist loader if active\n *\n * @param {SegmentLoader} segmentLoader\n *        SegmentLoader to pause\n * @param {Object} mediaType\n *        Active media type\n * @function stopLoaders\n */\n\n\nvar stopLoaders = function stopLoaders(segmentLoader, mediaType) {\n  segmentLoader.abort();\n  segmentLoader.pause();\n\n  if (mediaType && mediaType.activePlaylistLoader) {\n    mediaType.activePlaylistLoader.pause();\n    mediaType.activePlaylistLoader = null;\n  }\n};\n/**\n * Start loading provided segment loader and playlist loader\n *\n * @param {PlaylistLoader} playlistLoader\n *        PlaylistLoader to start loading\n * @param {Object} mediaType\n *        Active media type\n * @function startLoaders\n */\n\n\nvar startLoaders = function startLoaders(playlistLoader, mediaType) {\n  // Segment loader will be started after `loadedmetadata` or `loadedplaylist` from the\n  // playlist loader\n  mediaType.activePlaylistLoader = playlistLoader;\n  playlistLoader.load();\n};\n/**\n * Returns a function to be called when the media group changes. It performs a\n * non-destructive (preserve the buffer) resync of the SegmentLoader. This is because a\n * change of group is merely a rendition switch of the same content at another encoding,\n * rather than a change of content, such as switching audio from English to Spanish.\n *\n * @param {String} type\n *        MediaGroup type\n * @param {Object} settings\n *        Object containing required information for media groups\n * @return {Function}\n *         Handler for a non-destructive resync of SegmentLoader when the active media\n *         group changes.\n * @function onGroupChanged\n */\n\n\nvar onGroupChanged = function onGroupChanged(type, settings) {\n  return function () {\n    var _settings$segmentLoad = settings.segmentLoaders,\n        segmentLoader = _settings$segmentLoad[type],\n        mainSegmentLoader = _settings$segmentLoad.main,\n        mediaType = settings.mediaTypes[type];\n    var activeTrack = mediaType.activeTrack();\n    var activeGroup = mediaType.activeGroup(activeTrack);\n    var previousActiveLoader = mediaType.activePlaylistLoader;\n    stopLoaders(segmentLoader, mediaType);\n\n    if (!activeGroup) {\n      // there is no group active\n      return;\n    }\n\n    if (!activeGroup.playlistLoader) {\n      if (previousActiveLoader) {\n        // The previous group had a playlist loader but the new active group does not\n        // this means we are switching from demuxed to muxed audio. In this case we want to\n        // do a destructive reset of the main segment loader and not restart the audio\n        // loaders.\n        mainSegmentLoader.resetEverything();\n      }\n\n      return;\n    } // Non-destructive resync\n\n\n    segmentLoader.resyncLoader();\n    startLoaders(activeGroup.playlistLoader, mediaType);\n  };\n};\n/**\n * Returns a function to be called when the media track changes. It performs a\n * destructive reset of the SegmentLoader to ensure we start loading as close to\n * currentTime as possible.\n *\n * @param {String} type\n *        MediaGroup type\n * @param {Object} settings\n *        Object containing required information for media groups\n * @return {Function}\n *         Handler for a destructive reset of SegmentLoader when the active media\n *         track changes.\n * @function onTrackChanged\n */\n\n\nvar onTrackChanged = function onTrackChanged(type, settings) {\n  return function () {\n    var _settings$segmentLoad2 = settings.segmentLoaders,\n        segmentLoader = _settings$segmentLoad2[type],\n        mainSegmentLoader = _settings$segmentLoad2.main,\n        mediaType = settings.mediaTypes[type];\n    var activeTrack = mediaType.activeTrack();\n    var activeGroup = mediaType.activeGroup(activeTrack);\n    var previousActiveLoader = mediaType.activePlaylistLoader;\n    stopLoaders(segmentLoader, mediaType);\n\n    if (!activeGroup) {\n      // there is no group active so we do not want to restart loaders\n      return;\n    }\n\n    if (!activeGroup.playlistLoader) {\n      // when switching from demuxed audio/video to muxed audio/video (noted by no playlist\n      // loader for the audio group), we want to do a destructive reset of the main segment\n      // loader and not restart the audio loaders\n      mainSegmentLoader.resetEverything();\n      return;\n    }\n\n    if (previousActiveLoader === activeGroup.playlistLoader) {\n      // Nothing has actually changed. This can happen because track change events can fire\n      // multiple times for a \"single\" change. One for enabling the new active track, and\n      // one for disabling the track that was active\n      startLoaders(activeGroup.playlistLoader, mediaType);\n      return;\n    }\n\n    if (segmentLoader.track) {\n      // For WebVTT, set the new text track in the segmentloader\n      segmentLoader.track(activeTrack);\n    } // destructive reset\n\n\n    segmentLoader.resetEverything();\n    startLoaders(activeGroup.playlistLoader, mediaType);\n  };\n};\n\nvar onError = {\n  /**\n   * Returns a function to be called when a SegmentLoader or PlaylistLoader encounters\n   * an error.\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Error handler. Logs warning (or error if the playlist is blacklisted) to\n   *         console and switches back to default audio track.\n   * @function onError.AUDIO\n   */\n  AUDIO: function AUDIO(type, settings) {\n    return function () {\n      var segmentLoader = settings.segmentLoaders[type],\n          mediaType = settings.mediaTypes[type],\n          blacklistCurrentPlaylist = settings.blacklistCurrentPlaylist;\n      stopLoaders(segmentLoader, mediaType); // switch back to default audio track\n\n      var activeTrack = mediaType.activeTrack();\n      var activeGroup = mediaType.activeGroup();\n      var id = (activeGroup.filter(function (group) {\n        return group[\"default\"];\n      })[0] || activeGroup[0]).id;\n      var defaultTrack = mediaType.tracks[id];\n\n      if (activeTrack === defaultTrack) {\n        // Default track encountered an error. All we can do now is blacklist the current\n        // rendition and hope another will switch audio groups\n        blacklistCurrentPlaylist({\n          message: 'Problem encountered loading the default audio track.'\n        });\n        return;\n      }\n\n      videojs$1.log.warn('Problem encountered loading the alternate audio track.' + 'Switching back to default.');\n\n      for (var trackId in mediaType.tracks) {\n        mediaType.tracks[trackId].enabled = mediaType.tracks[trackId] === defaultTrack;\n      }\n\n      mediaType.onTrackChanged();\n    };\n  },\n\n  /**\n   * Returns a function to be called when a SegmentLoader or PlaylistLoader encounters\n   * an error.\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Error handler. Logs warning to console and disables the active subtitle track\n   * @function onError.SUBTITLES\n   */\n  SUBTITLES: function SUBTITLES(type, settings) {\n    return function () {\n      var segmentLoader = settings.segmentLoaders[type],\n          mediaType = settings.mediaTypes[type];\n      videojs$1.log.warn('Problem encountered loading the subtitle track.' + 'Disabling subtitle track.');\n      stopLoaders(segmentLoader, mediaType);\n      var track = mediaType.activeTrack();\n\n      if (track) {\n        track.mode = 'disabled';\n      }\n\n      mediaType.onTrackChanged();\n    };\n  }\n};\nvar setupListeners = {\n  /**\n   * Setup event listeners for audio playlist loader\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {PlaylistLoader|null} playlistLoader\n   *        PlaylistLoader to register listeners on\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function setupListeners.AUDIO\n   */\n  AUDIO: function AUDIO(type, playlistLoader, settings) {\n    if (!playlistLoader) {\n      // no playlist loader means audio will be muxed with the video\n      return;\n    }\n\n    var tech = settings.tech,\n        requestOptions = settings.requestOptions,\n        segmentLoader = settings.segmentLoaders[type];\n    playlistLoader.on('loadedmetadata', function () {\n      var media = playlistLoader.media();\n      segmentLoader.playlist(media, requestOptions); // if the video is already playing, or if this isn't a live video and preload\n      // permits, start downloading segments\n\n      if (!tech.paused() || media.endList && tech.preload() !== 'none') {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('loadedplaylist', function () {\n      segmentLoader.playlist(playlistLoader.media(), requestOptions); // If the player isn't paused, ensure that the segment loader is running\n\n      if (!tech.paused()) {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('error', onError[type](type, settings));\n  },\n\n  /**\n   * Setup event listeners for subtitle playlist loader\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {PlaylistLoader|null} playlistLoader\n   *        PlaylistLoader to register listeners on\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function setupListeners.SUBTITLES\n   */\n  SUBTITLES: function SUBTITLES(type, playlistLoader, settings) {\n    var tech = settings.tech,\n        requestOptions = settings.requestOptions,\n        segmentLoader = settings.segmentLoaders[type],\n        mediaType = settings.mediaTypes[type];\n    playlistLoader.on('loadedmetadata', function () {\n      var media = playlistLoader.media();\n      segmentLoader.playlist(media, requestOptions);\n      segmentLoader.track(mediaType.activeTrack()); // if the video is already playing, or if this isn't a live video and preload\n      // permits, start downloading segments\n\n      if (!tech.paused() || media.endList && tech.preload() !== 'none') {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('loadedplaylist', function () {\n      segmentLoader.playlist(playlistLoader.media(), requestOptions); // If the player isn't paused, ensure that the segment loader is running\n\n      if (!tech.paused()) {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('error', onError[type](type, settings));\n  }\n};\nvar initialize = {\n  /**\n   * Setup PlaylistLoaders and AudioTracks for the audio groups\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function initialize.AUDIO\n   */\n  'AUDIO': function AUDIO(type, settings) {\n    var hls = settings.hls,\n        sourceType = settings.sourceType,\n        segmentLoader = settings.segmentLoaders[type],\n        requestOptions = settings.requestOptions,\n        mediaGroups = settings.master.mediaGroups,\n        _settings$mediaTypes$ = settings.mediaTypes[type],\n        groups = _settings$mediaTypes$.groups,\n        tracks = _settings$mediaTypes$.tracks,\n        masterPlaylistLoader = settings.masterPlaylistLoader; // force a default if we have none\n\n    if (!mediaGroups[type] || Object.keys(mediaGroups[type]).length === 0) {\n      mediaGroups[type] = {\n        main: {\n          \"default\": {\n            \"default\": true\n          }\n        }\n      };\n    }\n\n    for (var groupId in mediaGroups[type]) {\n      if (!groups[groupId]) {\n        groups[groupId] = [];\n      } // List of playlists that have an AUDIO attribute value matching the current\n      // group ID\n\n\n      for (var variantLabel in mediaGroups[type][groupId]) {\n        var properties = mediaGroups[type][groupId][variantLabel];\n        var playlistLoader = void 0;\n\n        if (properties.resolvedUri) {\n          playlistLoader = new PlaylistLoader(properties.resolvedUri, hls, requestOptions);\n        } else if (properties.playlists && sourceType === 'dash') {\n          playlistLoader = new DashPlaylistLoader(properties.playlists[0], hls, requestOptions, masterPlaylistLoader);\n        } else {\n          // no resolvedUri means the audio is muxed with the video when using this\n          // audio track\n          playlistLoader = null;\n        }\n\n        properties = videojs$1.mergeOptions({\n          id: variantLabel,\n          playlistLoader: playlistLoader\n        }, properties);\n        setupListeners[type](type, properties.playlistLoader, settings);\n        groups[groupId].push(properties);\n\n        if (typeof tracks[variantLabel] === 'undefined') {\n          var track = new videojs$1.AudioTrack({\n            id: variantLabel,\n            kind: audioTrackKind_(properties),\n            enabled: false,\n            language: properties.language,\n            \"default\": properties[\"default\"],\n            label: variantLabel\n          });\n          tracks[variantLabel] = track;\n        }\n      }\n    } // setup single error event handler for the segment loader\n\n\n    segmentLoader.on('error', onError[type](type, settings));\n  },\n\n  /**\n   * Setup PlaylistLoaders and TextTracks for the subtitle groups\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function initialize.SUBTITLES\n   */\n  'SUBTITLES': function SUBTITLES(type, settings) {\n    var tech = settings.tech,\n        hls = settings.hls,\n        sourceType = settings.sourceType,\n        segmentLoader = settings.segmentLoaders[type],\n        requestOptions = settings.requestOptions,\n        mediaGroups = settings.master.mediaGroups,\n        _settings$mediaTypes$2 = settings.mediaTypes[type],\n        groups = _settings$mediaTypes$2.groups,\n        tracks = _settings$mediaTypes$2.tracks,\n        masterPlaylistLoader = settings.masterPlaylistLoader;\n\n    for (var groupId in mediaGroups[type]) {\n      if (!groups[groupId]) {\n        groups[groupId] = [];\n      }\n\n      for (var variantLabel in mediaGroups[type][groupId]) {\n        if (mediaGroups[type][groupId][variantLabel].forced) {\n          // Subtitle playlists with the forced attribute are not selectable in Safari.\n          // According to Apple's HLS Authoring Specification:\n          //   If content has forced subtitles and regular subtitles in a given language,\n          //   the regular subtitles track in that language MUST contain both the forced\n          //   subtitles and the regular subtitles for that language.\n          // Because of this requirement and that Safari does not add forced subtitles,\n          // forced subtitles are skipped here to maintain consistent experience across\n          // all platforms\n          continue;\n        }\n\n        var properties = mediaGroups[type][groupId][variantLabel];\n        var playlistLoader = void 0;\n\n        if (sourceType === 'hls') {\n          playlistLoader = new PlaylistLoader(properties.resolvedUri, hls, requestOptions);\n        } else if (sourceType === 'dash') {\n          playlistLoader = new DashPlaylistLoader(properties.playlists[0], hls, requestOptions, masterPlaylistLoader);\n        }\n\n        properties = videojs$1.mergeOptions({\n          id: variantLabel,\n          playlistLoader: playlistLoader\n        }, properties);\n        setupListeners[type](type, properties.playlistLoader, settings);\n        groups[groupId].push(properties);\n\n        if (typeof tracks[variantLabel] === 'undefined') {\n          var track = tech.addRemoteTextTrack({\n            id: variantLabel,\n            kind: 'subtitles',\n            \"default\": properties[\"default\"] && properties.autoselect,\n            language: properties.language,\n            label: variantLabel\n          }, false).track;\n          tracks[variantLabel] = track;\n        }\n      }\n    } // setup single error event handler for the segment loader\n\n\n    segmentLoader.on('error', onError[type](type, settings));\n  },\n\n  /**\n   * Setup TextTracks for the closed-caption groups\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function initialize['CLOSED-CAPTIONS']\n   */\n  'CLOSED-CAPTIONS': function CLOSEDCAPTIONS(type, settings) {\n    var tech = settings.tech,\n        mediaGroups = settings.master.mediaGroups,\n        _settings$mediaTypes$3 = settings.mediaTypes[type],\n        groups = _settings$mediaTypes$3.groups,\n        tracks = _settings$mediaTypes$3.tracks;\n\n    for (var groupId in mediaGroups[type]) {\n      if (!groups[groupId]) {\n        groups[groupId] = [];\n      }\n\n      for (var variantLabel in mediaGroups[type][groupId]) {\n        var properties = mediaGroups[type][groupId][variantLabel]; // We only support CEA608 captions for now, so ignore anything that\n        // doesn't use a CCx INSTREAM-ID\n\n        if (!properties.instreamId.match(/CC\\d/)) {\n          continue;\n        } // No PlaylistLoader is required for Closed-Captions because the captions are\n        // embedded within the video stream\n\n\n        groups[groupId].push(videojs$1.mergeOptions({\n          id: variantLabel\n        }, properties));\n\n        if (typeof tracks[variantLabel] === 'undefined') {\n          var track = tech.addRemoteTextTrack({\n            id: properties.instreamId,\n            kind: 'captions',\n            \"default\": properties[\"default\"] && properties.autoselect,\n            language: properties.language,\n            label: variantLabel\n          }, false).track;\n          tracks[variantLabel] = track;\n        }\n      }\n    }\n  }\n};\n/**\n * Returns a function used to get the active group of the provided type\n *\n * @param {String} type\n *        MediaGroup type\n * @param {Object} settings\n *        Object containing required information for media groups\n * @return {Function}\n *         Function that returns the active media group for the provided type. Takes an\n *         optional parameter {TextTrack} track. If no track is provided, a list of all\n *         variants in the group, otherwise the variant corresponding to the provided\n *         track is returned.\n * @function activeGroup\n */\n\nvar activeGroup = function activeGroup(type, settings) {\n  return function (track) {\n    var masterPlaylistLoader = settings.masterPlaylistLoader,\n        groups = settings.mediaTypes[type].groups;\n    var media = masterPlaylistLoader.media();\n\n    if (!media) {\n      return null;\n    }\n\n    var variants = null;\n\n    if (media.attributes[type]) {\n      variants = groups[media.attributes[type]];\n    }\n\n    variants = variants || groups.main;\n\n    if (typeof track === 'undefined') {\n      return variants;\n    }\n\n    if (track === null) {\n      // An active track was specified so a corresponding group is expected. track === null\n      // means no track is currently active so there is no corresponding group\n      return null;\n    }\n\n    return variants.filter(function (props) {\n      return props.id === track.id;\n    })[0] || null;\n  };\n};\n\nvar activeTrack = {\n  /**\n   * Returns a function used to get the active track of type provided\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Function that returns the active media track for the provided type. Returns\n   *         null if no track is active\n   * @function activeTrack.AUDIO\n   */\n  AUDIO: function AUDIO(type, settings) {\n    return function () {\n      var tracks = settings.mediaTypes[type].tracks;\n\n      for (var id in tracks) {\n        if (tracks[id].enabled) {\n          return tracks[id];\n        }\n      }\n\n      return null;\n    };\n  },\n\n  /**\n   * Returns a function used to get the active track of type provided\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Function that returns the active media track for the provided type. Returns\n   *         null if no track is active\n   * @function activeTrack.SUBTITLES\n   */\n  SUBTITLES: function SUBTITLES(type, settings) {\n    return function () {\n      var tracks = settings.mediaTypes[type].tracks;\n\n      for (var id in tracks) {\n        if (tracks[id].mode === 'showing') {\n          return tracks[id];\n        }\n      }\n\n      return null;\n    };\n  }\n};\n/**\n * Setup PlaylistLoaders and Tracks for media groups (Audio, Subtitles,\n * Closed-Captions) specified in the master manifest.\n *\n * @param {Object} settings\n *        Object containing required information for setting up the media groups\n * @param {SegmentLoader} settings.segmentLoaders.AUDIO\n *        Audio segment loader\n * @param {SegmentLoader} settings.segmentLoaders.SUBTITLES\n *        Subtitle segment loader\n * @param {SegmentLoader} settings.segmentLoaders.main\n *        Main segment loader\n * @param {Tech} settings.tech\n *        The tech of the player\n * @param {Object} settings.requestOptions\n *        XHR request options used by the segment loaders\n * @param {PlaylistLoader} settings.masterPlaylistLoader\n *        PlaylistLoader for the master source\n * @param {HlsHandler} settings.hls\n *        HLS SourceHandler\n * @param {Object} settings.master\n *        The parsed master manifest\n * @param {Object} settings.mediaTypes\n *        Object to store the loaders, tracks, and utility methods for each media type\n * @param {Function} settings.blacklistCurrentPlaylist\n *        Blacklists the current rendition and forces a rendition switch.\n * @function setupMediaGroups\n */\n\nvar setupMediaGroups = function setupMediaGroups(settings) {\n  ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(function (type) {\n    initialize[type](type, settings);\n  });\n  var mediaTypes = settings.mediaTypes,\n      masterPlaylistLoader = settings.masterPlaylistLoader,\n      tech = settings.tech,\n      hls = settings.hls; // setup active group and track getters and change event handlers\n\n  ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n    mediaTypes[type].activeGroup = activeGroup(type, settings);\n    mediaTypes[type].activeTrack = activeTrack[type](type, settings);\n    mediaTypes[type].onGroupChanged = onGroupChanged(type, settings);\n    mediaTypes[type].onTrackChanged = onTrackChanged(type, settings);\n  }); // DO NOT enable the default subtitle or caption track.\n  // DO enable the default audio track\n\n  var audioGroup = mediaTypes.AUDIO.activeGroup();\n  var groupId = (audioGroup.filter(function (group) {\n    return group[\"default\"];\n  })[0] || audioGroup[0]).id;\n  mediaTypes.AUDIO.tracks[groupId].enabled = true;\n  mediaTypes.AUDIO.onTrackChanged();\n  masterPlaylistLoader.on('mediachange', function () {\n    ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n      return mediaTypes[type].onGroupChanged();\n    });\n  }); // custom audio track change event handler for usage event\n\n  var onAudioTrackChanged = function onAudioTrackChanged() {\n    mediaTypes.AUDIO.onTrackChanged();\n    tech.trigger({\n      type: 'usage',\n      name: 'hls-audio-change'\n    });\n  };\n\n  tech.audioTracks().addEventListener('change', onAudioTrackChanged);\n  tech.remoteTextTracks().addEventListener('change', mediaTypes.SUBTITLES.onTrackChanged);\n  hls.on('dispose', function () {\n    tech.audioTracks().removeEventListener('change', onAudioTrackChanged);\n    tech.remoteTextTracks().removeEventListener('change', mediaTypes.SUBTITLES.onTrackChanged);\n  }); // clear existing audio tracks and add the ones we just created\n\n  tech.clearTracks('audio');\n\n  for (var id in mediaTypes.AUDIO.tracks) {\n    tech.audioTracks().addTrack(mediaTypes.AUDIO.tracks[id]);\n  }\n};\n/**\n * Creates skeleton object used to store the loaders, tracks, and utility methods for each\n * media type\n *\n * @return {Object}\n *         Object to store the loaders, tracks, and utility methods for each media type\n * @function createMediaTypes\n */\n\n\nvar createMediaTypes = function createMediaTypes() {\n  var mediaTypes = {};\n  ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(function (type) {\n    mediaTypes[type] = {\n      groups: {},\n      tracks: {},\n      activePlaylistLoader: null,\n      activeGroup: noop,\n      activeTrack: noop,\n      onGroupChanged: noop,\n      onTrackChanged: noop\n    };\n  });\n  return mediaTypes;\n};\n/**\n * @file master-playlist-controller.js\n */\n\n\nvar ABORT_EARLY_BLACKLIST_SECONDS = 60 * 2;\nvar Hls = void 0; // SegmentLoader stats that need to have each loader's\n// values summed to calculate the final value\n\nvar loaderStats = ['mediaRequests', 'mediaRequestsAborted', 'mediaRequestsTimedout', 'mediaRequestsErrored', 'mediaTransferDuration', 'mediaBytesTransferred'];\n\nvar sumLoaderStat = function sumLoaderStat(stat) {\n  return this.audioSegmentLoader_[stat] + this.mainSegmentLoader_[stat];\n};\n/**\n * the master playlist controller controller all interactons\n * between playlists and segmentloaders. At this time this mainly\n * involves a master playlist and a series of audio playlists\n * if they are available\n *\n * @class MasterPlaylistController\n * @extends videojs.EventTarget\n */\n\n\nvar MasterPlaylistController = function (_videojs$EventTarget) {\n  inherits(MasterPlaylistController, _videojs$EventTarget);\n\n  function MasterPlaylistController(options) {\n    classCallCheck(this, MasterPlaylistController);\n\n    var _this = possibleConstructorReturn(this, (MasterPlaylistController.__proto__ || Object.getPrototypeOf(MasterPlaylistController)).call(this));\n\n    var url = options.url,\n        handleManifestRedirects = options.handleManifestRedirects,\n        withCredentials = options.withCredentials,\n        tech = options.tech,\n        bandwidth = options.bandwidth,\n        externHls = options.externHls,\n        useCueTags = options.useCueTags,\n        blacklistDuration = options.blacklistDuration,\n        enableLowInitialPlaylist = options.enableLowInitialPlaylist,\n        sourceType = options.sourceType,\n        seekTo = options.seekTo,\n        cacheEncryptionKeys = options.cacheEncryptionKeys;\n\n    if (!url) {\n      throw new Error('A non-empty playlist URL is required');\n    }\n\n    Hls = externHls;\n    _this.withCredentials = withCredentials;\n    _this.tech_ = tech;\n    _this.hls_ = tech.hls;\n    _this.seekTo_ = seekTo;\n    _this.sourceType_ = sourceType;\n    _this.useCueTags_ = useCueTags;\n    _this.blacklistDuration = blacklistDuration;\n    _this.enableLowInitialPlaylist = enableLowInitialPlaylist;\n\n    if (_this.useCueTags_) {\n      _this.cueTagsTrack_ = _this.tech_.addTextTrack('metadata', 'ad-cues');\n      _this.cueTagsTrack_.inBandMetadataTrackDispatchType = '';\n    }\n\n    _this.requestOptions_ = {\n      withCredentials: withCredentials,\n      handleManifestRedirects: handleManifestRedirects,\n      timeout: null\n    };\n    _this.mediaTypes_ = createMediaTypes();\n    _this.mediaSource = new videojs$1.MediaSource(); // load the media source into the player\n\n    _this.mediaSource.addEventListener('sourceopen', _this.handleSourceOpen_.bind(_this));\n\n    _this.seekable_ = videojs$1.createTimeRanges();\n\n    _this.hasPlayed_ = function () {\n      return false;\n    };\n\n    _this.syncController_ = new SyncController(options);\n    _this.segmentMetadataTrack_ = tech.addRemoteTextTrack({\n      kind: 'metadata',\n      label: 'segment-metadata'\n    }, false).track;\n    _this.decrypter_ = new Decrypter$1();\n    _this.inbandTextTracks_ = {};\n    var segmentLoaderSettings = {\n      hls: _this.hls_,\n      mediaSource: _this.mediaSource,\n      currentTime: _this.tech_.currentTime.bind(_this.tech_),\n      seekable: function seekable$$1() {\n        return _this.seekable();\n      },\n      seeking: function seeking() {\n        return _this.tech_.seeking();\n      },\n      duration: function duration$$1() {\n        return _this.mediaSource.duration;\n      },\n      hasPlayed: function hasPlayed() {\n        return _this.hasPlayed_();\n      },\n      goalBufferLength: function goalBufferLength() {\n        return _this.goalBufferLength();\n      },\n      bandwidth: bandwidth,\n      syncController: _this.syncController_,\n      decrypter: _this.decrypter_,\n      sourceType: _this.sourceType_,\n      inbandTextTracks: _this.inbandTextTracks_,\n      cacheEncryptionKeys: cacheEncryptionKeys\n    };\n    _this.masterPlaylistLoader_ = _this.sourceType_ === 'dash' ? new DashPlaylistLoader(url, _this.hls_, _this.requestOptions_) : new PlaylistLoader(url, _this.hls_, _this.requestOptions_);\n\n    _this.setupMasterPlaylistLoaderListeners_(); // setup segment loaders\n    // combined audio/video or just video when alternate audio track is selected\n\n\n    _this.mainSegmentLoader_ = new SegmentLoader(videojs$1.mergeOptions(segmentLoaderSettings, {\n      segmentMetadataTrack: _this.segmentMetadataTrack_,\n      loaderType: 'main'\n    }), options); // alternate audio track\n\n    _this.audioSegmentLoader_ = new SegmentLoader(videojs$1.mergeOptions(segmentLoaderSettings, {\n      loaderType: 'audio'\n    }), options);\n    _this.subtitleSegmentLoader_ = new VTTSegmentLoader(videojs$1.mergeOptions(segmentLoaderSettings, {\n      loaderType: 'vtt'\n    }), options);\n\n    _this.setupSegmentLoaderListeners_(); // Create SegmentLoader stat-getters\n\n\n    loaderStats.forEach(function (stat) {\n      _this[stat + '_'] = sumLoaderStat.bind(_this, stat);\n    });\n    _this.logger_ = logger('MPC');\n\n    _this.masterPlaylistLoader_.load();\n\n    return _this;\n  }\n  /**\n   * Register event handlers on the master playlist loader. A helper\n   * function for construction time.\n   *\n   * @private\n   */\n\n\n  createClass(MasterPlaylistController, [{\n    key: 'setupMasterPlaylistLoaderListeners_',\n    value: function setupMasterPlaylistLoaderListeners_() {\n      var _this2 = this;\n\n      this.masterPlaylistLoader_.on('loadedmetadata', function () {\n        var media = _this2.masterPlaylistLoader_.media();\n\n        var requestTimeout = media.targetDuration * 1.5 * 1000; // If we don't have any more available playlists, we don't want to\n        // timeout the request.\n\n        if (isLowestEnabledRendition(_this2.masterPlaylistLoader_.master, _this2.masterPlaylistLoader_.media())) {\n          _this2.requestOptions_.timeout = 0;\n        } else {\n          _this2.requestOptions_.timeout = requestTimeout;\n        } // if this isn't a live video and preload permits, start\n        // downloading segments\n\n\n        if (media.endList && _this2.tech_.preload() !== 'none') {\n          _this2.mainSegmentLoader_.playlist(media, _this2.requestOptions_);\n\n          _this2.mainSegmentLoader_.load();\n        }\n\n        setupMediaGroups({\n          sourceType: _this2.sourceType_,\n          segmentLoaders: {\n            AUDIO: _this2.audioSegmentLoader_,\n            SUBTITLES: _this2.subtitleSegmentLoader_,\n            main: _this2.mainSegmentLoader_\n          },\n          tech: _this2.tech_,\n          requestOptions: _this2.requestOptions_,\n          masterPlaylistLoader: _this2.masterPlaylistLoader_,\n          hls: _this2.hls_,\n          master: _this2.master(),\n          mediaTypes: _this2.mediaTypes_,\n          blacklistCurrentPlaylist: _this2.blacklistCurrentPlaylist.bind(_this2)\n        });\n\n        _this2.triggerPresenceUsage_(_this2.master(), media);\n\n        try {\n          _this2.setupSourceBuffers_();\n        } catch (e) {\n          videojs$1.log.warn('Failed to create SourceBuffers', e);\n          return _this2.mediaSource.endOfStream('decode');\n        }\n\n        _this2.setupFirstPlay();\n\n        if (!_this2.mediaTypes_.AUDIO.activePlaylistLoader || _this2.mediaTypes_.AUDIO.activePlaylistLoader.media()) {\n          _this2.trigger('selectedinitialmedia');\n        } else {\n          // We must wait for the active audio playlist loader to\n          // finish setting up before triggering this event so the\n          // representations API and EME setup is correct\n          _this2.mediaTypes_.AUDIO.activePlaylistLoader.one('loadedmetadata', function () {\n            _this2.trigger('selectedinitialmedia');\n          });\n        }\n      });\n      this.masterPlaylistLoader_.on('loadedplaylist', function () {\n        var updatedPlaylist = _this2.masterPlaylistLoader_.media();\n\n        if (!updatedPlaylist) {\n          // blacklist any variants that are not supported by the browser before selecting\n          // an initial media as the playlist selectors do not consider browser support\n          _this2.excludeUnsupportedVariants_();\n\n          var selectedMedia = void 0;\n\n          if (_this2.enableLowInitialPlaylist) {\n            selectedMedia = _this2.selectInitialPlaylist();\n          }\n\n          if (!selectedMedia) {\n            selectedMedia = _this2.selectPlaylist();\n          }\n\n          _this2.initialMedia_ = selectedMedia;\n\n          _this2.masterPlaylistLoader_.media(_this2.initialMedia_);\n\n          return;\n        }\n\n        if (_this2.useCueTags_) {\n          _this2.updateAdCues_(updatedPlaylist);\n        } // TODO: Create a new event on the PlaylistLoader that signals\n        // that the segments have changed in some way and use that to\n        // update the SegmentLoader instead of doing it twice here and\n        // on `mediachange`\n\n\n        _this2.mainSegmentLoader_.playlist(updatedPlaylist, _this2.requestOptions_);\n\n        _this2.updateDuration(); // If the player isn't paused, ensure that the segment loader is running,\n        // as it is possible that it was temporarily stopped while waiting for\n        // a playlist (e.g., in case the playlist errored and we re-requested it).\n\n\n        if (!_this2.tech_.paused()) {\n          _this2.mainSegmentLoader_.load();\n\n          if (_this2.audioSegmentLoader_) {\n            _this2.audioSegmentLoader_.load();\n          }\n        }\n\n        if (!updatedPlaylist.endList) {\n          var addSeekableRange = function addSeekableRange() {\n            var seekable$$1 = _this2.seekable();\n\n            if (seekable$$1.length !== 0) {\n              _this2.mediaSource.addSeekableRange_(seekable$$1.start(0), seekable$$1.end(0));\n            }\n          };\n\n          if (_this2.duration() !== Infinity) {\n            var onDurationchange = function onDurationchange() {\n              if (_this2.duration() === Infinity) {\n                addSeekableRange();\n              } else {\n                _this2.tech_.one('durationchange', onDurationchange);\n              }\n            };\n\n            _this2.tech_.one('durationchange', onDurationchange);\n          } else {\n            addSeekableRange();\n          }\n        }\n      });\n      this.masterPlaylistLoader_.on('error', function () {\n        _this2.blacklistCurrentPlaylist(_this2.masterPlaylistLoader_.error);\n      });\n      this.masterPlaylistLoader_.on('mediachanging', function () {\n        _this2.mainSegmentLoader_.abort();\n\n        _this2.mainSegmentLoader_.pause();\n      });\n      this.masterPlaylistLoader_.on('mediachange', function () {\n        var media = _this2.masterPlaylistLoader_.media();\n\n        var requestTimeout = media.targetDuration * 1.5 * 1000; // If we don't have any more available playlists, we don't want to\n        // timeout the request.\n\n        if (isLowestEnabledRendition(_this2.masterPlaylistLoader_.master, _this2.masterPlaylistLoader_.media())) {\n          _this2.requestOptions_.timeout = 0;\n        } else {\n          _this2.requestOptions_.timeout = requestTimeout;\n        } // TODO: Create a new event on the PlaylistLoader that signals\n        // that the segments have changed in some way and use that to\n        // update the SegmentLoader instead of doing it twice here and\n        // on `loadedplaylist`\n\n\n        _this2.mainSegmentLoader_.playlist(media, _this2.requestOptions_);\n\n        _this2.mainSegmentLoader_.load();\n\n        _this2.tech_.trigger({\n          type: 'mediachange',\n          bubbles: true\n        });\n      });\n      this.masterPlaylistLoader_.on('playlistunchanged', function () {\n        var updatedPlaylist = _this2.masterPlaylistLoader_.media();\n\n        var playlistOutdated = _this2.stuckAtPlaylistEnd_(updatedPlaylist);\n\n        if (playlistOutdated) {\n          // Playlist has stopped updating and we're stuck at its end. Try to\n          // blacklist it and switch to another playlist in the hope that that\n          // one is updating (and give the player a chance to re-adjust to the\n          // safe live point).\n          _this2.blacklistCurrentPlaylist({\n            message: 'Playlist no longer updating.'\n          }); // useful for monitoring QoS\n\n\n          _this2.tech_.trigger('playliststuck');\n        }\n      });\n      this.masterPlaylistLoader_.on('renditiondisabled', function () {\n        _this2.tech_.trigger({\n          type: 'usage',\n          name: 'hls-rendition-disabled'\n        });\n      });\n      this.masterPlaylistLoader_.on('renditionenabled', function () {\n        _this2.tech_.trigger({\n          type: 'usage',\n          name: 'hls-rendition-enabled'\n        });\n      });\n    }\n    /**\n     * A helper function for triggerring presence usage events once per source\n     *\n     * @private\n     */\n\n  }, {\n    key: 'triggerPresenceUsage_',\n    value: function triggerPresenceUsage_(master, media) {\n      var mediaGroups = master.mediaGroups || {};\n      var defaultDemuxed = true;\n      var audioGroupKeys = Object.keys(mediaGroups.AUDIO);\n\n      for (var mediaGroup in mediaGroups.AUDIO) {\n        for (var label in mediaGroups.AUDIO[mediaGroup]) {\n          var properties = mediaGroups.AUDIO[mediaGroup][label];\n\n          if (!properties.uri) {\n            defaultDemuxed = false;\n          }\n        }\n      }\n\n      if (defaultDemuxed) {\n        this.tech_.trigger({\n          type: 'usage',\n          name: 'hls-demuxed'\n        });\n      }\n\n      if (Object.keys(mediaGroups.SUBTITLES).length) {\n        this.tech_.trigger({\n          type: 'usage',\n          name: 'hls-webvtt'\n        });\n      }\n\n      if (Hls.Playlist.isAes(media)) {\n        this.tech_.trigger({\n          type: 'usage',\n          name: 'hls-aes'\n        });\n      }\n\n      if (Hls.Playlist.isFmp4(media)) {\n        this.tech_.trigger({\n          type: 'usage',\n          name: 'hls-fmp4'\n        });\n      }\n\n      if (audioGroupKeys.length && Object.keys(mediaGroups.AUDIO[audioGroupKeys[0]]).length > 1) {\n        this.tech_.trigger({\n          type: 'usage',\n          name: 'hls-alternate-audio'\n        });\n      }\n\n      if (this.useCueTags_) {\n        this.tech_.trigger({\n          type: 'usage',\n          name: 'hls-playlist-cue-tags'\n        });\n      }\n    }\n    /**\n     * Register event handlers on the segment loaders. A helper function\n     * for construction time.\n     *\n     * @private\n     */\n\n  }, {\n    key: 'setupSegmentLoaderListeners_',\n    value: function setupSegmentLoaderListeners_() {\n      var _this3 = this;\n\n      this.mainSegmentLoader_.on('bandwidthupdate', function () {\n        var nextPlaylist = _this3.selectPlaylist();\n\n        var currentPlaylist = _this3.masterPlaylistLoader_.media();\n\n        var buffered = _this3.tech_.buffered();\n\n        var forwardBuffer = buffered.length ? buffered.end(buffered.length - 1) - _this3.tech_.currentTime() : 0;\n\n        var bufferLowWaterLine = _this3.bufferLowWaterLine(); // If the playlist is live, then we want to not take low water line into account.\n        // This is because in LIVE, the player plays 3 segments from the end of the\n        // playlist, and if `BUFFER_LOW_WATER_LINE` is greater than the duration availble\n        // in those segments, a viewer will never experience a rendition upswitch.\n\n\n        if (!currentPlaylist.endList || // For the same reason as LIVE, we ignore the low water line when the VOD\n        // duration is below the max potential low water line\n        _this3.duration() < Config.MAX_BUFFER_LOW_WATER_LINE || // we want to switch down to lower resolutions quickly to continue playback, but\n        nextPlaylist.attributes.BANDWIDTH < currentPlaylist.attributes.BANDWIDTH || // ensure we have some buffer before we switch up to prevent us running out of\n        // buffer while loading a higher rendition.\n        forwardBuffer >= bufferLowWaterLine) {\n          _this3.masterPlaylistLoader_.media(nextPlaylist);\n        }\n\n        _this3.tech_.trigger('bandwidthupdate');\n      });\n      this.mainSegmentLoader_.on('progress', function () {\n        _this3.trigger('progress');\n      });\n      this.mainSegmentLoader_.on('error', function () {\n        _this3.blacklistCurrentPlaylist(_this3.mainSegmentLoader_.error());\n      });\n      this.mainSegmentLoader_.on('syncinfoupdate', function () {\n        _this3.onSyncInfoUpdate_();\n      });\n      this.mainSegmentLoader_.on('timestampoffset', function () {\n        _this3.tech_.trigger({\n          type: 'usage',\n          name: 'hls-timestamp-offset'\n        });\n      });\n      this.audioSegmentLoader_.on('syncinfoupdate', function () {\n        _this3.onSyncInfoUpdate_();\n      });\n      this.mainSegmentLoader_.on('ended', function () {\n        _this3.onEndOfStream();\n      });\n      this.mainSegmentLoader_.on('earlyabort', function () {\n        _this3.blacklistCurrentPlaylist({\n          message: 'Aborted early because there isn\\'t enough bandwidth to complete the ' + 'request without rebuffering.'\n        }, ABORT_EARLY_BLACKLIST_SECONDS);\n      });\n      this.mainSegmentLoader_.on('reseteverything', function () {\n        // If playing an MTS stream, a videojs.MediaSource is listening for\n        // hls-reset to reset caption parsing state in the transmuxer\n        _this3.tech_.trigger('hls-reset');\n      });\n      this.mainSegmentLoader_.on('segmenttimemapping', function (event) {\n        // If playing an MTS stream in html, a videojs.MediaSource is listening for\n        // hls-segment-time-mapping update its internal mapping of stream to display time\n        _this3.tech_.trigger({\n          type: 'hls-segment-time-mapping',\n          mapping: event.mapping\n        });\n      });\n      this.audioSegmentLoader_.on('ended', function () {\n        _this3.onEndOfStream();\n      });\n    }\n  }, {\n    key: 'mediaSecondsLoaded_',\n    value: function mediaSecondsLoaded_() {\n      return Math.max(this.audioSegmentLoader_.mediaSecondsLoaded + this.mainSegmentLoader_.mediaSecondsLoaded);\n    }\n    /**\n     * Call load on our SegmentLoaders\n     */\n\n  }, {\n    key: 'load',\n    value: function load() {\n      this.mainSegmentLoader_.load();\n\n      if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n        this.audioSegmentLoader_.load();\n      }\n\n      if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {\n        this.subtitleSegmentLoader_.load();\n      }\n    }\n    /**\n     * Re-tune playback quality level for the current player\n     * conditions without performing destructive actions, like\n     * removing already buffered content\n     *\n     * @private\n     */\n\n  }, {\n    key: 'smoothQualityChange_',\n    value: function smoothQualityChange_() {\n      var media = this.selectPlaylist();\n\n      if (media !== this.masterPlaylistLoader_.media()) {\n        this.masterPlaylistLoader_.media(media);\n        this.mainSegmentLoader_.resetLoader(); // don't need to reset audio as it is reset when media changes\n      }\n    }\n    /**\n     * Re-tune playback quality level for the current player\n     * conditions. This method will perform destructive actions like removing\n     * already buffered content in order to readjust the currently active\n     * playlist quickly. This is good for manual quality changes\n     *\n     * @private\n     */\n\n  }, {\n    key: 'fastQualityChange_',\n    value: function fastQualityChange_() {\n      var _this4 = this;\n\n      var media = this.selectPlaylist();\n\n      if (media === this.masterPlaylistLoader_.media()) {\n        return;\n      }\n\n      this.masterPlaylistLoader_.media(media); // Delete all buffered data to allow an immediate quality switch, then seek to give\n      // the browser a kick to remove any cached frames from the previous rendtion (.04 seconds\n      // ahead is roughly the minimum that will accomplish this across a variety of content\n      // in IE and Edge, but seeking in place is sufficient on all other browsers)\n      // Edge/IE bug: https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/14600375/\n      // Chrome bug: https://bugs.chromium.org/p/chromium/issues/detail?id=651904\n\n      this.mainSegmentLoader_.resetEverything(function () {\n        // Since this is not a typical seek, we avoid the seekTo method which can cause segments\n        // from the previously enabled rendition to load before the new playlist has finished loading\n        if (videojs$1.browser.IE_VERSION || videojs$1.browser.IS_EDGE) {\n          _this4.tech_.setCurrentTime(_this4.tech_.currentTime() + 0.04);\n        } else {\n          _this4.tech_.setCurrentTime(_this4.tech_.currentTime());\n        }\n      }); // don't need to reset audio as it is reset when media changes\n    }\n    /**\n     * Begin playback.\n     */\n\n  }, {\n    key: 'play',\n    value: function play() {\n      if (this.setupFirstPlay()) {\n        return;\n      }\n\n      if (this.tech_.ended()) {\n        this.seekTo_(0);\n      }\n\n      if (this.hasPlayed_()) {\n        this.load();\n      }\n\n      var seekable$$1 = this.tech_.seekable(); // if the viewer has paused and we fell out of the live window,\n      // seek forward to the live point\n\n      if (this.tech_.duration() === Infinity) {\n        if (this.tech_.currentTime() < seekable$$1.start(0)) {\n          return this.seekTo_(seekable$$1.end(seekable$$1.length - 1));\n        }\n      }\n    }\n    /**\n     * Seek to the latest media position if this is a live video and the\n     * player and video are loaded and initialized.\n     */\n\n  }, {\n    key: 'setupFirstPlay',\n    value: function setupFirstPlay() {\n      var _this5 = this;\n\n      var media = this.masterPlaylistLoader_.media(); // Check that everything is ready to begin buffering for the first call to play\n      //  If 1) there is no active media\n      //     2) the player is paused\n      //     3) the first play has already been setup\n      // then exit early\n\n      if (!media || this.tech_.paused() || this.hasPlayed_()) {\n        return false;\n      } // when the video is a live stream\n\n\n      if (!media.endList) {\n        var seekable$$1 = this.seekable();\n\n        if (!seekable$$1.length) {\n          // without a seekable range, the player cannot seek to begin buffering at the live\n          // point\n          return false;\n        }\n\n        if (videojs$1.browser.IE_VERSION && this.tech_.readyState() === 0) {\n          // IE11 throws an InvalidStateError if you try to set currentTime while the\n          // readyState is 0, so it must be delayed until the tech fires loadedmetadata.\n          this.tech_.one('loadedmetadata', function () {\n            _this5.trigger('firstplay');\n\n            _this5.seekTo_(seekable$$1.end(0));\n\n            _this5.hasPlayed_ = function () {\n              return true;\n            };\n          });\n          return false;\n        } // trigger firstplay to inform the source handler to ignore the next seek event\n\n\n        this.trigger('firstplay'); // seek to the live point\n\n        this.seekTo_(seekable$$1.end(0));\n      }\n\n      this.hasPlayed_ = function () {\n        return true;\n      }; // we can begin loading now that everything is ready\n\n\n      this.load();\n      return true;\n    }\n    /**\n     * handle the sourceopen event on the MediaSource\n     *\n     * @private\n     */\n\n  }, {\n    key: 'handleSourceOpen_',\n    value: function handleSourceOpen_() {\n      // Only attempt to create the source buffer if none already exist.\n      // handleSourceOpen is also called when we are \"re-opening\" a source buffer\n      // after `endOfStream` has been called (in response to a seek for instance)\n      try {\n        this.setupSourceBuffers_();\n      } catch (e) {\n        videojs$1.log.warn('Failed to create Source Buffers', e);\n        return this.mediaSource.endOfStream('decode');\n      } // if autoplay is enabled, begin playback. This is duplicative of\n      // code in video.js but is required because play() must be invoked\n      // *after* the media source has opened.\n\n\n      if (this.tech_.autoplay()) {\n        var playPromise = this.tech_.play(); // Catch/silence error when a pause interrupts a play request\n        // on browsers which return a promise\n\n        if (typeof playPromise !== 'undefined' && typeof playPromise.then === 'function') {\n          playPromise.then(null, function (e) {});\n        }\n      }\n\n      this.trigger('sourceopen');\n    }\n    /**\n     * Calls endOfStream on the media source when all active stream types have called\n     * endOfStream\n     *\n     * @param {string} streamType\n     *        Stream type of the segment loader that called endOfStream\n     * @private\n     */\n\n  }, {\n    key: 'onEndOfStream',\n    value: function onEndOfStream() {\n      var isEndOfStream = this.mainSegmentLoader_.ended_;\n\n      if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n        // if the audio playlist loader exists, then alternate audio is active\n        if (!this.mainSegmentLoader_.startingMedia_ || this.mainSegmentLoader_.startingMedia_.containsVideo) {\n          // if we do not know if the main segment loader contains video yet or if we\n          // definitively know the main segment loader contains video, then we need to wait\n          // for both main and audio segment loaders to call endOfStream\n          isEndOfStream = isEndOfStream && this.audioSegmentLoader_.ended_;\n        } else {\n          // otherwise just rely on the audio loader\n          isEndOfStream = this.audioSegmentLoader_.ended_;\n        }\n      }\n\n      if (!isEndOfStream) {\n        return;\n      }\n\n      this.logger_('calling mediaSource.endOfStream()'); // on chrome calling endOfStream can sometimes cause an exception,\n      // even when the media source is in a valid state.\n\n      try {\n        this.mediaSource.endOfStream();\n      } catch (e) {\n        videojs$1.log.warn('Failed to call media source endOfStream', e);\n      }\n    }\n    /**\n     * Check if a playlist has stopped being updated\n     * @param {Object} playlist the media playlist object\n     * @return {boolean} whether the playlist has stopped being updated or not\n     */\n\n  }, {\n    key: 'stuckAtPlaylistEnd_',\n    value: function stuckAtPlaylistEnd_(playlist) {\n      var seekable$$1 = this.seekable();\n\n      if (!seekable$$1.length) {\n        // playlist doesn't have enough information to determine whether we are stuck\n        return false;\n      }\n\n      var expired = this.syncController_.getExpiredTime(playlist, this.mediaSource.duration);\n\n      if (expired === null) {\n        return false;\n      } // does not use the safe live end to calculate playlist end, since we\n      // don't want to say we are stuck while there is still content\n\n\n      var absolutePlaylistEnd = Hls.Playlist.playlistEnd(playlist, expired);\n      var currentTime = this.tech_.currentTime();\n      var buffered = this.tech_.buffered();\n\n      if (!buffered.length) {\n        // return true if the playhead reached the absolute end of the playlist\n        return absolutePlaylistEnd - currentTime <= SAFE_TIME_DELTA;\n      }\n\n      var bufferedEnd = buffered.end(buffered.length - 1); // return true if there is too little buffer left and buffer has reached absolute\n      // end of playlist\n\n      return bufferedEnd - currentTime <= SAFE_TIME_DELTA && absolutePlaylistEnd - bufferedEnd <= SAFE_TIME_DELTA;\n    }\n    /**\n     * Blacklists a playlist when an error occurs for a set amount of time\n     * making it unavailable for selection by the rendition selection algorithm\n     * and then forces a new playlist (rendition) selection.\n     *\n     * @param {Object=} error an optional error that may include the playlist\n     * to blacklist\n     * @param {Number=} blacklistDuration an optional number of seconds to blacklist the\n     * playlist\n     */\n\n  }, {\n    key: 'blacklistCurrentPlaylist',\n    value: function blacklistCurrentPlaylist() {\n      var error = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n      var blacklistDuration = arguments[1];\n      var currentPlaylist = void 0;\n      var nextPlaylist = void 0; // If the `error` was generated by the playlist loader, it will contain\n      // the playlist we were trying to load (but failed) and that should be\n      // blacklisted instead of the currently selected playlist which is likely\n      // out-of-date in this scenario\n\n      currentPlaylist = error.playlist || this.masterPlaylistLoader_.media();\n      blacklistDuration = blacklistDuration || error.blacklistDuration || this.blacklistDuration; // If there is no current playlist, then an error occurred while we were\n      // trying to load the master OR while we were disposing of the tech\n\n      if (!currentPlaylist) {\n        this.error = error;\n\n        try {\n          return this.mediaSource.endOfStream('network');\n        } catch (e) {\n          return this.trigger('error');\n        }\n      }\n\n      var isFinalRendition = this.masterPlaylistLoader_.master.playlists.filter(isEnabled).length === 1;\n      var playlists = this.masterPlaylistLoader_.master.playlists;\n\n      if (playlists.length === 1) {\n        // Never blacklisting this playlist because it's the only playlist\n        videojs$1.log.warn('Problem encountered with the current ' + 'HLS playlist. Trying again since it is the only playlist.');\n        this.tech_.trigger('retryplaylist');\n        return this.masterPlaylistLoader_.load(isFinalRendition);\n      }\n\n      if (isFinalRendition) {\n        // Since we're on the final non-blacklisted playlist, and we're about to blacklist\n        // it, instead of erring the player or retrying this playlist, clear out the current\n        // blacklist. This allows other playlists to be attempted in case any have been\n        // fixed.\n        videojs$1.log.warn('Removing all playlists from the blacklist because the last ' + 'rendition is about to be blacklisted.');\n        playlists.forEach(function (playlist) {\n          if (playlist.excludeUntil !== Infinity) {\n            delete playlist.excludeUntil;\n          }\n        }); // Technically we are retrying a playlist, in that we are simply retrying a previous\n        // playlist. This is needed for users relying on the retryplaylist event to catch a\n        // case where the player might be stuck and looping through \"dead\" playlists.\n\n        this.tech_.trigger('retryplaylist');\n      } // Blacklist this playlist\n\n\n      currentPlaylist.excludeUntil = Date.now() + blacklistDuration * 1000;\n      this.tech_.trigger('blacklistplaylist');\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-rendition-blacklisted'\n      }); // Select a new playlist\n\n      nextPlaylist = this.selectPlaylist();\n      videojs$1.log.warn('Problem encountered with the current HLS playlist.' + (error.message ? ' ' + error.message : '') + ' Switching to another playlist.');\n      return this.masterPlaylistLoader_.media(nextPlaylist, isFinalRendition);\n    }\n    /**\n     * Pause all segment loaders\n     */\n\n  }, {\n    key: 'pauseLoading',\n    value: function pauseLoading() {\n      this.mainSegmentLoader_.pause();\n\n      if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n        this.audioSegmentLoader_.pause();\n      }\n\n      if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {\n        this.subtitleSegmentLoader_.pause();\n      }\n    }\n    /**\n     * set the current time on all segment loaders\n     *\n     * @param {TimeRange} currentTime the current time to set\n     * @return {TimeRange} the current time\n     */\n\n  }, {\n    key: 'setCurrentTime',\n    value: function setCurrentTime(currentTime) {\n      var buffered = findRange(this.tech_.buffered(), currentTime);\n\n      if (!(this.masterPlaylistLoader_ && this.masterPlaylistLoader_.media())) {\n        // return immediately if the metadata is not ready yet\n        return 0;\n      } // it's clearly an edge-case but don't thrown an error if asked to\n      // seek within an empty playlist\n\n\n      if (!this.masterPlaylistLoader_.media().segments) {\n        return 0;\n      } // In flash playback, the segment loaders should be reset on every seek, even\n      // in buffer seeks. If the seek location is already buffered, continue buffering as\n      // usual\n      // TODO: redo this comment\n\n\n      if (buffered && buffered.length) {\n        return currentTime;\n      } // cancel outstanding requests so we begin buffering at the new\n      // location\n\n\n      this.mainSegmentLoader_.resetEverything();\n      this.mainSegmentLoader_.abort();\n\n      if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n        this.audioSegmentLoader_.resetEverything();\n        this.audioSegmentLoader_.abort();\n      }\n\n      if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {\n        this.subtitleSegmentLoader_.resetEverything();\n        this.subtitleSegmentLoader_.abort();\n      } // start segment loader loading in case they are paused\n\n\n      this.load();\n    }\n    /**\n     * get the current duration\n     *\n     * @return {TimeRange} the duration\n     */\n\n  }, {\n    key: 'duration',\n    value: function duration$$1() {\n      if (!this.masterPlaylistLoader_) {\n        return 0;\n      }\n\n      if (this.mediaSource) {\n        return this.mediaSource.duration;\n      }\n\n      return Hls.Playlist.duration(this.masterPlaylistLoader_.media());\n    }\n    /**\n     * check the seekable range\n     *\n     * @return {TimeRange} the seekable range\n     */\n\n  }, {\n    key: 'seekable',\n    value: function seekable$$1() {\n      return this.seekable_;\n    }\n  }, {\n    key: 'onSyncInfoUpdate_',\n    value: function onSyncInfoUpdate_() {\n      var mainSeekable = void 0;\n      var audioSeekable = void 0;\n\n      if (!this.masterPlaylistLoader_) {\n        return;\n      }\n\n      var media = this.masterPlaylistLoader_.media();\n\n      if (!media) {\n        return;\n      }\n\n      var expired = this.syncController_.getExpiredTime(media, this.mediaSource.duration);\n\n      if (expired === null) {\n        // not enough information to update seekable\n        return;\n      }\n\n      mainSeekable = Hls.Playlist.seekable(media, expired);\n\n      if (mainSeekable.length === 0) {\n        return;\n      }\n\n      if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n        media = this.mediaTypes_.AUDIO.activePlaylistLoader.media();\n        expired = this.syncController_.getExpiredTime(media, this.mediaSource.duration);\n\n        if (expired === null) {\n          return;\n        }\n\n        audioSeekable = Hls.Playlist.seekable(media, expired);\n\n        if (audioSeekable.length === 0) {\n          return;\n        }\n      }\n\n      var oldEnd = void 0;\n      var oldStart = void 0;\n\n      if (this.seekable_ && this.seekable_.length) {\n        oldEnd = this.seekable_.end(0);\n        oldStart = this.seekable_.start(0);\n      }\n\n      if (!audioSeekable) {\n        // seekable has been calculated based on buffering video data so it\n        // can be returned directly\n        this.seekable_ = mainSeekable;\n      } else if (audioSeekable.start(0) > mainSeekable.end(0) || mainSeekable.start(0) > audioSeekable.end(0)) {\n        // seekables are pretty far off, rely on main\n        this.seekable_ = mainSeekable;\n      } else {\n        this.seekable_ = videojs$1.createTimeRanges([[audioSeekable.start(0) > mainSeekable.start(0) ? audioSeekable.start(0) : mainSeekable.start(0), audioSeekable.end(0) < mainSeekable.end(0) ? audioSeekable.end(0) : mainSeekable.end(0)]]);\n      } // seekable is the same as last time\n\n\n      if (this.seekable_ && this.seekable_.length) {\n        if (this.seekable_.end(0) === oldEnd && this.seekable_.start(0) === oldStart) {\n          return;\n        }\n      }\n\n      this.logger_('seekable updated [' + printableRange(this.seekable_) + ']');\n      this.tech_.trigger('seekablechanged');\n    }\n    /**\n     * Update the player duration\n     */\n\n  }, {\n    key: 'updateDuration',\n    value: function updateDuration() {\n      var _this6 = this;\n\n      var oldDuration = this.mediaSource.duration;\n      var newDuration = Hls.Playlist.duration(this.masterPlaylistLoader_.media());\n      var buffered = this.tech_.buffered();\n\n      var setDuration = function setDuration() {\n        // on firefox setting the duration may sometimes cause an exception\n        // even if the media source is open and source buffers are not\n        // updating, something about the media source being in an invalid state.\n        _this6.logger_('Setting duration from ' + _this6.mediaSource.duration + ' => ' + newDuration);\n\n        try {\n          _this6.mediaSource.duration = newDuration;\n        } catch (e) {\n          videojs$1.log.warn('Failed to set media source duration', e);\n        }\n\n        _this6.tech_.trigger('durationchange');\n\n        _this6.mediaSource.removeEventListener('sourceopen', setDuration);\n      };\n\n      if (buffered.length > 0) {\n        newDuration = Math.max(newDuration, buffered.end(buffered.length - 1));\n      } // if the duration has changed, invalidate the cached value\n\n\n      if (oldDuration !== newDuration) {\n        // update the duration\n        if (this.mediaSource.readyState !== 'open') {\n          this.mediaSource.addEventListener('sourceopen', setDuration);\n        } else {\n          setDuration();\n        }\n      }\n    }\n    /**\n     * dispose of the MasterPlaylistController and everything\n     * that it controls\n     */\n\n  }, {\n    key: 'dispose',\n    value: function dispose() {\n      var _this7 = this;\n\n      this.decrypter_.terminate();\n      this.masterPlaylistLoader_.dispose();\n      this.mainSegmentLoader_.dispose();\n      ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n        var groups = _this7.mediaTypes_[type].groups;\n\n        for (var id in groups) {\n          groups[id].forEach(function (group) {\n            if (group.playlistLoader) {\n              group.playlistLoader.dispose();\n            }\n          });\n        }\n      });\n      this.audioSegmentLoader_.dispose();\n      this.subtitleSegmentLoader_.dispose();\n    }\n    /**\n     * return the master playlist object if we have one\n     *\n     * @return {Object} the master playlist object that we parsed\n     */\n\n  }, {\n    key: 'master',\n    value: function master() {\n      return this.masterPlaylistLoader_.master;\n    }\n    /**\n     * return the currently selected playlist\n     *\n     * @return {Object} the currently selected playlist object that we parsed\n     */\n\n  }, {\n    key: 'media',\n    value: function media() {\n      // playlist loader will not return media if it has not been fully loaded\n      return this.masterPlaylistLoader_.media() || this.initialMedia_;\n    }\n    /**\n     * setup our internal source buffers on our segment Loaders\n     *\n     * @private\n     */\n\n  }, {\n    key: 'setupSourceBuffers_',\n    value: function setupSourceBuffers_() {\n      var media = this.masterPlaylistLoader_.media();\n      var mimeTypes = void 0; // wait until a media playlist is available and the Media Source is\n      // attached\n\n      if (!media || this.mediaSource.readyState !== 'open') {\n        return;\n      }\n\n      mimeTypes = mimeTypesForPlaylist(this.masterPlaylistLoader_.master, media);\n\n      if (mimeTypes.length < 1) {\n        this.error = 'No compatible SourceBuffer configuration for the variant stream:' + media.resolvedUri;\n        return this.mediaSource.endOfStream('decode');\n      }\n\n      this.configureLoaderMimeTypes_(mimeTypes); // exclude any incompatible variant streams from future playlist\n      // selection\n\n      this.excludeIncompatibleVariants_(media);\n    }\n  }, {\n    key: 'configureLoaderMimeTypes_',\n    value: function configureLoaderMimeTypes_(mimeTypes) {\n      // If the content is demuxed, we can't start appending segments to a source buffer\n      // until both source buffers are set up, or else the browser may not let us add the\n      // second source buffer (it will assume we are playing either audio only or video\n      // only).\n      var sourceBufferEmitter = // If there is more than one mime type\n      mimeTypes.length > 1 && // and the first mime type does not have muxed video and audio\n      mimeTypes[0].indexOf(',') === -1 && // and the two mime types are different (they can be the same in the case of audio\n      // only with alternate audio)\n      mimeTypes[0] !== mimeTypes[1] ? // then we want to wait on the second source buffer\n      new videojs$1.EventTarget() : // otherwise there is no need to wait as the content is either audio only,\n      // video only, or muxed content.\n      null;\n      this.mainSegmentLoader_.mimeType(mimeTypes[0], sourceBufferEmitter);\n\n      if (mimeTypes[1]) {\n        this.audioSegmentLoader_.mimeType(mimeTypes[1], sourceBufferEmitter);\n      }\n    }\n    /**\n     * Blacklists playlists with codecs that are unsupported by the browser.\n     */\n\n  }, {\n    key: 'excludeUnsupportedVariants_',\n    value: function excludeUnsupportedVariants_() {\n      this.master().playlists.forEach(function (variant) {\n        if (variant.attributes.CODECS && window$1.MediaSource && window$1.MediaSource.isTypeSupported && !window$1.MediaSource.isTypeSupported('video/mp4; codecs=\"' + mapLegacyAvcCodecs(variant.attributes.CODECS) + '\"')) {\n          variant.excludeUntil = Infinity;\n        }\n      });\n    }\n    /**\n     * Blacklist playlists that are known to be codec or\n     * stream-incompatible with the SourceBuffer configuration. For\n     * instance, Media Source Extensions would cause the video element to\n     * stall waiting for video data if you switched from a variant with\n     * video and audio to an audio-only one.\n     *\n     * @param {Object} media a media playlist compatible with the current\n     * set of SourceBuffers. Variants in the current master playlist that\n     * do not appear to have compatible codec or stream configurations\n     * will be excluded from the default playlist selection algorithm\n     * indefinitely.\n     * @private\n     */\n\n  }, {\n    key: 'excludeIncompatibleVariants_',\n    value: function excludeIncompatibleVariants_(media) {\n      var codecCount = 2;\n      var videoCodec = null;\n      var codecs = void 0;\n\n      if (media.attributes.CODECS) {\n        codecs = parseCodecs(media.attributes.CODECS);\n        videoCodec = codecs.videoCodec;\n        codecCount = codecs.codecCount;\n      }\n\n      this.master().playlists.forEach(function (variant) {\n        var variantCodecs = {\n          codecCount: 2,\n          videoCodec: null\n        };\n\n        if (variant.attributes.CODECS) {\n          variantCodecs = parseCodecs(variant.attributes.CODECS);\n        } // if the streams differ in the presence or absence of audio or\n        // video, they are incompatible\n\n\n        if (variantCodecs.codecCount !== codecCount) {\n          variant.excludeUntil = Infinity;\n        } // if h.264 is specified on the current playlist, some flavor of\n        // it must be specified on all compatible variants\n\n\n        if (variantCodecs.videoCodec !== videoCodec) {\n          variant.excludeUntil = Infinity;\n        }\n      });\n    }\n  }, {\n    key: 'updateAdCues_',\n    value: function updateAdCues_(media) {\n      var offset = 0;\n      var seekable$$1 = this.seekable();\n\n      if (seekable$$1.length) {\n        offset = seekable$$1.start(0);\n      }\n\n      updateAdCues(media, this.cueTagsTrack_, offset);\n    }\n    /**\n     * Calculates the desired forward buffer length based on current time\n     *\n     * @return {Number} Desired forward buffer length in seconds\n     */\n\n  }, {\n    key: 'goalBufferLength',\n    value: function goalBufferLength() {\n      var currentTime = this.tech_.currentTime();\n      var initial = Config.GOAL_BUFFER_LENGTH;\n      var rate = Config.GOAL_BUFFER_LENGTH_RATE;\n      var max = Math.max(initial, Config.MAX_GOAL_BUFFER_LENGTH);\n      return Math.min(initial + currentTime * rate, max);\n    }\n    /**\n     * Calculates the desired buffer low water line based on current time\n     *\n     * @return {Number} Desired buffer low water line in seconds\n     */\n\n  }, {\n    key: 'bufferLowWaterLine',\n    value: function bufferLowWaterLine() {\n      var currentTime = this.tech_.currentTime();\n      var initial = Config.BUFFER_LOW_WATER_LINE;\n      var rate = Config.BUFFER_LOW_WATER_LINE_RATE;\n      var max = Math.max(initial, Config.MAX_BUFFER_LOW_WATER_LINE);\n      return Math.min(initial + currentTime * rate, max);\n    }\n  }]);\n  return MasterPlaylistController;\n}(videojs$1.EventTarget);\n/**\n * Returns a function that acts as the Enable/disable playlist function.\n *\n * @param {PlaylistLoader} loader - The master playlist loader\n * @param {String} playlistUri - uri of the playlist\n * @param {Function} changePlaylistFn - A function to be called after a\n * playlist's enabled-state has been changed. Will NOT be called if a\n * playlist's enabled-state is unchanged\n * @param {Boolean=} enable - Value to set the playlist enabled-state to\n * or if undefined returns the current enabled-state for the playlist\n * @return {Function} Function for setting/getting enabled\n */\n\n\nvar enableFunction = function enableFunction(loader, playlistUri, changePlaylistFn) {\n  return function (enable) {\n    var playlist = loader.master.playlists[playlistUri];\n    var incompatible = isIncompatible(playlist);\n    var currentlyEnabled = isEnabled(playlist);\n\n    if (typeof enable === 'undefined') {\n      return currentlyEnabled;\n    }\n\n    if (enable) {\n      delete playlist.disabled;\n    } else {\n      playlist.disabled = true;\n    }\n\n    if (enable !== currentlyEnabled && !incompatible) {\n      // Ensure the outside world knows about our changes\n      changePlaylistFn();\n\n      if (enable) {\n        loader.trigger('renditionenabled');\n      } else {\n        loader.trigger('renditiondisabled');\n      }\n    }\n\n    return enable;\n  };\n};\n/**\n * The representation object encapsulates the publicly visible information\n * in a media playlist along with a setter/getter-type function (enabled)\n * for changing the enabled-state of a particular playlist entry\n *\n * @class Representation\n */\n\n\nvar Representation = function Representation(hlsHandler, playlist, id) {\n  classCallCheck(this, Representation);\n  var mpc = hlsHandler.masterPlaylistController_,\n      smoothQualityChange = hlsHandler.options_.smoothQualityChange; // Get a reference to a bound version of the quality change function\n\n  var changeType = smoothQualityChange ? 'smooth' : 'fast';\n  var qualityChangeFunction = mpc[changeType + 'QualityChange_'].bind(mpc); // some playlist attributes are optional\n\n  if (playlist.attributes.RESOLUTION) {\n    var resolution = playlist.attributes.RESOLUTION;\n    this.width = resolution.width;\n    this.height = resolution.height;\n  }\n\n  this.bandwidth = playlist.attributes.BANDWIDTH; // The id is simply the ordinality of the media playlist\n  // within the master playlist\n\n  this.id = id; // Partially-apply the enableFunction to create a playlist-\n  // specific variant\n\n  this.enabled = enableFunction(hlsHandler.playlists, playlist.uri, qualityChangeFunction);\n};\n/**\n * A mixin function that adds the `representations` api to an instance\n * of the HlsHandler class\n * @param {HlsHandler} hlsHandler - An instance of HlsHandler to add the\n * representation API into\n */\n\n\nvar renditionSelectionMixin = function renditionSelectionMixin(hlsHandler) {\n  var playlists = hlsHandler.playlists; // Add a single API-specific function to the HlsHandler instance\n\n  hlsHandler.representations = function () {\n    return playlists.master.playlists.filter(function (media) {\n      return !isIncompatible(media);\n    }).map(function (e, i) {\n      return new Representation(hlsHandler, e, e.uri);\n    });\n  };\n};\n/**\n * @file playback-watcher.js\n *\n * Playback starts, and now my watch begins. It shall not end until my death. I shall\n * take no wait, hold no uncleared timeouts, father no bad seeks. I shall wear no crowns\n * and win no glory. I shall live and die at my post. I am the corrector of the underflow.\n * I am the watcher of gaps. I am the shield that guards the realms of seekable. I pledge\n * my life and honor to the Playback Watch, for this Player and all the Players to come.\n */\n// Set of events that reset the playback-watcher time check logic and clear the timeout\n\n\nvar timerCancelEvents = ['seeking', 'seeked', 'pause', 'playing', 'error'];\n/**\n * @class PlaybackWatcher\n */\n\nvar PlaybackWatcher = function () {\n  /**\n   * Represents an PlaybackWatcher object.\n   * @constructor\n   * @param {object} options an object that includes the tech and settings\n   */\n  function PlaybackWatcher(options) {\n    var _this = this;\n\n    classCallCheck(this, PlaybackWatcher);\n    this.tech_ = options.tech;\n    this.seekable = options.seekable;\n    this.seekTo = options.seekTo;\n    this.allowSeeksWithinUnsafeLiveWindow = options.allowSeeksWithinUnsafeLiveWindow;\n    this.media = options.media;\n    this.consecutiveUpdates = 0;\n    this.lastRecordedTime = null;\n    this.timer_ = null;\n    this.checkCurrentTimeTimeout_ = null;\n    this.logger_ = logger('PlaybackWatcher');\n    this.logger_('initialize');\n\n    var canPlayHandler = function canPlayHandler() {\n      return _this.monitorCurrentTime_();\n    };\n\n    var waitingHandler = function waitingHandler() {\n      return _this.techWaiting_();\n    };\n\n    var cancelTimerHandler = function cancelTimerHandler() {\n      return _this.cancelTimer_();\n    };\n\n    var fixesBadSeeksHandler = function fixesBadSeeksHandler() {\n      return _this.fixesBadSeeks_();\n    };\n\n    this.tech_.on('seekablechanged', fixesBadSeeksHandler);\n    this.tech_.on('waiting', waitingHandler);\n    this.tech_.on(timerCancelEvents, cancelTimerHandler);\n    this.tech_.on('canplay', canPlayHandler); // Define the dispose function to clean up our events\n\n    this.dispose = function () {\n      _this.logger_('dispose');\n\n      _this.tech_.off('seekablechanged', fixesBadSeeksHandler);\n\n      _this.tech_.off('waiting', waitingHandler);\n\n      _this.tech_.off(timerCancelEvents, cancelTimerHandler);\n\n      _this.tech_.off('canplay', canPlayHandler);\n\n      if (_this.checkCurrentTimeTimeout_) {\n        window$1.clearTimeout(_this.checkCurrentTimeTimeout_);\n      }\n\n      _this.cancelTimer_();\n    };\n  }\n  /**\n   * Periodically check current time to see if playback stopped\n   *\n   * @private\n   */\n\n\n  createClass(PlaybackWatcher, [{\n    key: 'monitorCurrentTime_',\n    value: function monitorCurrentTime_() {\n      this.checkCurrentTime_();\n\n      if (this.checkCurrentTimeTimeout_) {\n        window$1.clearTimeout(this.checkCurrentTimeTimeout_);\n      } // 42 = 24 fps // 250 is what Webkit uses // FF uses 15\n\n\n      this.checkCurrentTimeTimeout_ = window$1.setTimeout(this.monitorCurrentTime_.bind(this), 250);\n    }\n    /**\n     * The purpose of this function is to emulate the \"waiting\" event on\n     * browsers that do not emit it when they are waiting for more\n     * data to continue playback\n     *\n     * @private\n     */\n\n  }, {\n    key: 'checkCurrentTime_',\n    value: function checkCurrentTime_() {\n      if (this.tech_.seeking() && this.fixesBadSeeks_()) {\n        this.consecutiveUpdates = 0;\n        this.lastRecordedTime = this.tech_.currentTime();\n        return;\n      }\n\n      if (this.tech_.paused() || this.tech_.seeking()) {\n        return;\n      }\n\n      var currentTime = this.tech_.currentTime();\n      var buffered = this.tech_.buffered();\n\n      if (this.lastRecordedTime === currentTime && (!buffered.length || currentTime + SAFE_TIME_DELTA >= buffered.end(buffered.length - 1))) {\n        // If current time is at the end of the final buffered region, then any playback\n        // stall is most likely caused by buffering in a low bandwidth environment. The tech\n        // should fire a `waiting` event in this scenario, but due to browser and tech\n        // inconsistencies. Calling `techWaiting_` here allows us to simulate\n        // responding to a native `waiting` event when the tech fails to emit one.\n        return this.techWaiting_();\n      }\n\n      if (this.consecutiveUpdates >= 5 && currentTime === this.lastRecordedTime) {\n        this.consecutiveUpdates++;\n        this.waiting_();\n      } else if (currentTime === this.lastRecordedTime) {\n        this.consecutiveUpdates++;\n      } else {\n        this.consecutiveUpdates = 0;\n        this.lastRecordedTime = currentTime;\n      }\n    }\n    /**\n     * Cancels any pending timers and resets the 'timeupdate' mechanism\n     * designed to detect that we are stalled\n     *\n     * @private\n     */\n\n  }, {\n    key: 'cancelTimer_',\n    value: function cancelTimer_() {\n      this.consecutiveUpdates = 0;\n\n      if (this.timer_) {\n        this.logger_('cancelTimer_');\n        clearTimeout(this.timer_);\n      }\n\n      this.timer_ = null;\n    }\n    /**\n     * Fixes situations where there's a bad seek\n     *\n     * @return {Boolean} whether an action was taken to fix the seek\n     * @private\n     */\n\n  }, {\n    key: 'fixesBadSeeks_',\n    value: function fixesBadSeeks_() {\n      var seeking = this.tech_.seeking();\n\n      if (!seeking) {\n        return false;\n      }\n\n      var seekable = this.seekable();\n      var currentTime = this.tech_.currentTime();\n      var isAfterSeekableRange = this.afterSeekableWindow_(seekable, currentTime, this.media(), this.allowSeeksWithinUnsafeLiveWindow);\n      var seekTo = void 0;\n\n      if (isAfterSeekableRange) {\n        var seekableEnd = seekable.end(seekable.length - 1); // sync to live point (if VOD, our seekable was updated and we're simply adjusting)\n\n        seekTo = seekableEnd;\n      }\n\n      if (this.beforeSeekableWindow_(seekable, currentTime)) {\n        var seekableStart = seekable.start(0); // sync to the beginning of the live window\n        // provide a buffer of .1 seconds to handle rounding/imprecise numbers\n\n        seekTo = seekableStart + SAFE_TIME_DELTA;\n      }\n\n      if (typeof seekTo !== 'undefined') {\n        this.logger_('Trying to seek outside of seekable at time ' + currentTime + ' with ' + ('seekable range ' + printableRange(seekable) + '. Seeking to ') + (seekTo + '.'));\n        this.seekTo(seekTo);\n        return true;\n      }\n\n      return false;\n    }\n    /**\n     * Handler for situations when we determine the player is waiting.\n     *\n     * @private\n     */\n\n  }, {\n    key: 'waiting_',\n    value: function waiting_() {\n      if (this.techWaiting_()) {\n        return;\n      } // All tech waiting checks failed. Use last resort correction\n\n\n      var currentTime = this.tech_.currentTime();\n      var buffered = this.tech_.buffered();\n      var currentRange = findRange(buffered, currentTime); // Sometimes the player can stall for unknown reasons within a contiguous buffered\n      // region with no indication that anything is amiss (seen in Firefox). Seeking to\n      // currentTime is usually enough to kickstart the player. This checks that the player\n      // is currently within a buffered region before attempting a corrective seek.\n      // Chrome does not appear to continue `timeupdate` events after a `waiting` event\n      // until there is ~ 3 seconds of forward buffer available. PlaybackWatcher should also\n      // make sure there is ~3 seconds of forward buffer before taking any corrective action\n      // to avoid triggering an `unknownwaiting` event when the network is slow.\n\n      if (currentRange.length && currentTime + 3 <= currentRange.end(0)) {\n        this.cancelTimer_();\n        this.seekTo(currentTime);\n        this.logger_('Stopped at ' + currentTime + ' while inside a buffered region ' + ('[' + currentRange.start(0) + ' -> ' + currentRange.end(0) + ']. Attempting to resume ') + 'playback by seeking to the current time.'); // unknown waiting corrections may be useful for monitoring QoS\n\n        this.tech_.trigger({\n          type: 'usage',\n          name: 'hls-unknown-waiting'\n        });\n        return;\n      }\n    }\n    /**\n     * Handler for situations when the tech fires a `waiting` event\n     *\n     * @return {Boolean}\n     *         True if an action (or none) was needed to correct the waiting. False if no\n     *         checks passed\n     * @private\n     */\n\n  }, {\n    key: 'techWaiting_',\n    value: function techWaiting_() {\n      var seekable = this.seekable();\n      var currentTime = this.tech_.currentTime();\n\n      if (this.tech_.seeking() && this.fixesBadSeeks_()) {\n        // Tech is seeking or bad seek fixed, no action needed\n        return true;\n      }\n\n      if (this.tech_.seeking() || this.timer_ !== null) {\n        // Tech is seeking or already waiting on another action, no action needed\n        return true;\n      }\n\n      if (this.beforeSeekableWindow_(seekable, currentTime)) {\n        var livePoint = seekable.end(seekable.length - 1);\n        this.logger_('Fell out of live window at time ' + currentTime + '. Seeking to ' + ('live point (seekable end) ' + livePoint));\n        this.cancelTimer_();\n        this.seekTo(livePoint); // live window resyncs may be useful for monitoring QoS\n\n        this.tech_.trigger({\n          type: 'usage',\n          name: 'hls-live-resync'\n        });\n        return true;\n      }\n\n      var buffered = this.tech_.buffered();\n      var nextRange = findNextRange(buffered, currentTime);\n\n      if (this.videoUnderflow_(nextRange, buffered, currentTime)) {\n        // Even though the video underflowed and was stuck in a gap, the audio overplayed\n        // the gap, leading currentTime into a buffered range. Seeking to currentTime\n        // allows the video to catch up to the audio position without losing any audio\n        // (only suffering ~3 seconds of frozen video and a pause in audio playback).\n        this.cancelTimer_();\n        this.seekTo(currentTime); // video underflow may be useful for monitoring QoS\n\n        this.tech_.trigger({\n          type: 'usage',\n          name: 'hls-video-underflow'\n        });\n        return true;\n      } // check for gap\n\n\n      if (nextRange.length > 0) {\n        var difference = nextRange.start(0) - currentTime;\n        this.logger_('Stopped at ' + currentTime + ', setting timer for ' + difference + ', seeking ' + ('to ' + nextRange.start(0)));\n        this.timer_ = setTimeout(this.skipTheGap_.bind(this), difference * 1000, currentTime);\n        return true;\n      } // All checks failed. Returning false to indicate failure to correct waiting\n\n\n      return false;\n    }\n  }, {\n    key: 'afterSeekableWindow_',\n    value: function afterSeekableWindow_(seekable, currentTime, playlist) {\n      var allowSeeksWithinUnsafeLiveWindow = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : false;\n\n      if (!seekable.length) {\n        // we can't make a solid case if there's no seekable, default to false\n        return false;\n      }\n\n      var allowedEnd = seekable.end(seekable.length - 1) + SAFE_TIME_DELTA;\n      var isLive = !playlist.endList;\n\n      if (isLive && allowSeeksWithinUnsafeLiveWindow) {\n        allowedEnd = seekable.end(seekable.length - 1) + playlist.targetDuration * 3;\n      }\n\n      if (currentTime > allowedEnd) {\n        return true;\n      }\n\n      return false;\n    }\n  }, {\n    key: 'beforeSeekableWindow_',\n    value: function beforeSeekableWindow_(seekable, currentTime) {\n      if (seekable.length && // can't fall before 0 and 0 seekable start identifies VOD stream\n      seekable.start(0) > 0 && currentTime < seekable.start(0) - SAFE_TIME_DELTA) {\n        return true;\n      }\n\n      return false;\n    }\n  }, {\n    key: 'videoUnderflow_',\n    value: function videoUnderflow_(nextRange, buffered, currentTime) {\n      if (nextRange.length === 0) {\n        // Even if there is no available next range, there is still a possibility we are\n        // stuck in a gap due to video underflow.\n        var gap = this.gapFromVideoUnderflow_(buffered, currentTime);\n\n        if (gap) {\n          this.logger_('Encountered a gap in video from ' + gap.start + ' to ' + gap.end + '. ' + ('Seeking to current time ' + currentTime));\n          return true;\n        }\n      }\n\n      return false;\n    }\n    /**\n     * Timer callback. If playback still has not proceeded, then we seek\n     * to the start of the next buffered region.\n     *\n     * @private\n     */\n\n  }, {\n    key: 'skipTheGap_',\n    value: function skipTheGap_(scheduledCurrentTime) {\n      var buffered = this.tech_.buffered();\n      var currentTime = this.tech_.currentTime();\n      var nextRange = findNextRange(buffered, currentTime);\n      this.cancelTimer_();\n\n      if (nextRange.length === 0 || currentTime !== scheduledCurrentTime) {\n        return;\n      }\n\n      this.logger_('skipTheGap_:', 'currentTime:', currentTime, 'scheduled currentTime:', scheduledCurrentTime, 'nextRange start:', nextRange.start(0)); // only seek if we still have not played\n\n      this.seekTo(nextRange.start(0) + TIME_FUDGE_FACTOR);\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-gap-skip'\n      });\n    }\n  }, {\n    key: 'gapFromVideoUnderflow_',\n    value: function gapFromVideoUnderflow_(buffered, currentTime) {\n      // At least in Chrome, if there is a gap in the video buffer, the audio will continue\n      // playing for ~3 seconds after the video gap starts. This is done to account for\n      // video buffer underflow/underrun (note that this is not done when there is audio\n      // buffer underflow/underrun -- in that case the video will stop as soon as it\n      // encounters the gap, as audio stalls are more noticeable/jarring to a user than\n      // video stalls). The player's time will reflect the playthrough of audio, so the\n      // time will appear as if we are in a buffered region, even if we are stuck in a\n      // \"gap.\"\n      //\n      // Example:\n      // video buffer:   0 => 10.1, 10.2 => 20\n      // audio buffer:   0 => 20\n      // overall buffer: 0 => 10.1, 10.2 => 20\n      // current time: 13\n      //\n      // Chrome's video froze at 10 seconds, where the video buffer encountered the gap,\n      // however, the audio continued playing until it reached ~3 seconds past the gap\n      // (13 seconds), at which point it stops as well. Since current time is past the\n      // gap, findNextRange will return no ranges.\n      //\n      // To check for this issue, we see if there is a gap that starts somewhere within\n      // a 3 second range (3 seconds +/- 1 second) back from our current time.\n      var gaps = findGaps(buffered);\n\n      for (var i = 0; i < gaps.length; i++) {\n        var start = gaps.start(i);\n        var end = gaps.end(i); // gap is starts no more than 4 seconds back\n\n        if (currentTime - start < 4 && currentTime - start > 2) {\n          return {\n            start: start,\n            end: end\n          };\n        }\n      }\n\n      return null;\n    }\n  }]);\n  return PlaybackWatcher;\n}();\n\nvar defaultOptions = {\n  errorInterval: 30,\n  getSource: function getSource(next) {\n    var tech = this.tech({\n      IWillNotUseThisInPlugins: true\n    });\n    var sourceObj = tech.currentSource_;\n    return next(sourceObj);\n  }\n};\n/**\n * Main entry point for the plugin\n *\n * @param {Player} player a reference to a videojs Player instance\n * @param {Object} [options] an object with plugin options\n * @private\n */\n\nvar initPlugin = function initPlugin(player, options) {\n  var lastCalled = 0;\n  var seekTo = 0;\n  var localOptions = videojs$1.mergeOptions(defaultOptions, options);\n  player.ready(function () {\n    player.trigger({\n      type: 'usage',\n      name: 'hls-error-reload-initialized'\n    });\n  });\n  /**\n   * Player modifications to perform that must wait until `loadedmetadata`\n   * has been triggered\n   *\n   * @private\n   */\n\n  var loadedMetadataHandler = function loadedMetadataHandler() {\n    if (seekTo) {\n      player.currentTime(seekTo);\n    }\n  };\n  /**\n   * Set the source on the player element, play, and seek if necessary\n   *\n   * @param {Object} sourceObj An object specifying the source url and mime-type to play\n   * @private\n   */\n\n\n  var setSource = function setSource(sourceObj) {\n    if (sourceObj === null || sourceObj === undefined) {\n      return;\n    }\n\n    seekTo = player.duration() !== Infinity && player.currentTime() || 0;\n    player.one('loadedmetadata', loadedMetadataHandler);\n    player.src(sourceObj);\n    player.trigger({\n      type: 'usage',\n      name: 'hls-error-reload'\n    });\n    player.play();\n  };\n  /**\n   * Attempt to get a source from either the built-in getSource function\n   * or a custom function provided via the options\n   *\n   * @private\n   */\n\n\n  var errorHandler = function errorHandler() {\n    // Do not attempt to reload the source if a source-reload occurred before\n    // 'errorInterval' time has elapsed since the last source-reload\n    if (Date.now() - lastCalled < localOptions.errorInterval * 1000) {\n      player.trigger({\n        type: 'usage',\n        name: 'hls-error-reload-canceled'\n      });\n      return;\n    }\n\n    if (!localOptions.getSource || typeof localOptions.getSource !== 'function') {\n      videojs$1.log.error('ERROR: reloadSourceOnError - The option getSource must be a function!');\n      return;\n    }\n\n    lastCalled = Date.now();\n    return localOptions.getSource.call(player, setSource);\n  };\n  /**\n   * Unbind any event handlers that were bound by the plugin\n   *\n   * @private\n   */\n\n\n  var cleanupEvents = function cleanupEvents() {\n    player.off('loadedmetadata', loadedMetadataHandler);\n    player.off('error', errorHandler);\n    player.off('dispose', cleanupEvents);\n  };\n  /**\n   * Cleanup before re-initializing the plugin\n   *\n   * @param {Object} [newOptions] an object with plugin options\n   * @private\n   */\n\n\n  var reinitPlugin = function reinitPlugin(newOptions) {\n    cleanupEvents();\n    initPlugin(player, newOptions);\n  };\n\n  player.on('error', errorHandler);\n  player.on('dispose', cleanupEvents); // Overwrite the plugin function so that we can correctly cleanup before\n  // initializing the plugin\n\n  player.reloadSourceOnError = reinitPlugin;\n};\n/**\n * Reload the source when an error is detected as long as there\n * wasn't an error previously within the last 30 seconds\n *\n * @param {Object} [options] an object with plugin options\n */\n\n\nvar reloadSourceOnError = function reloadSourceOnError(options) {\n  initPlugin(this, options);\n};\n\nvar version$1 = \"1.10.6\"; // since VHS handles HLS and DASH (and in the future, more types), use * to capture all\n\nvideojs$1.use('*', function (player) {\n  return {\n    setSource: function setSource(srcObj, next) {\n      // pass null as the first argument to indicate that the source is not rejected\n      next(null, srcObj);\n    },\n    // VHS needs to know when seeks happen. For external seeks (generated at the player\n    // level), this middleware will capture the action. For internal seeks (generated at\n    // the tech level), we use a wrapped function so that we can handle it on our own\n    // (specified elsewhere).\n    setCurrentTime: function setCurrentTime(time) {\n      if (player.vhs && player.currentSource().src === player.vhs.source_.src) {\n        player.vhs.setCurrentTime(time);\n      }\n\n      return time;\n    },\n    // Sync VHS after play requests.\n    // This specifically handles replay where the order of actions is\n    // play, video element will seek to 0 (skipping the setCurrentTime middleware)\n    // then triggers a play event.\n    play: function play() {\n      if (player.vhs && player.currentSource().src === player.vhs.source_.src) {\n        player.vhs.setCurrentTime(player.tech_.currentTime());\n      }\n    }\n  };\n});\n/**\n * @file videojs-http-streaming.js\n *\n * The main file for the HLS project.\n * License: https://github.com/videojs/videojs-http-streaming/blob/master/LICENSE\n */\n\nvar Hls$1 = {\n  PlaylistLoader: PlaylistLoader,\n  Playlist: Playlist,\n  Decrypter: Decrypter,\n  AsyncStream: AsyncStream,\n  decrypt: decrypt,\n  utils: utils,\n  STANDARD_PLAYLIST_SELECTOR: lastBandwidthSelector,\n  INITIAL_PLAYLIST_SELECTOR: lowestBitrateCompatibleVariantSelector,\n  comparePlaylistBandwidth: comparePlaylistBandwidth,\n  comparePlaylistResolution: comparePlaylistResolution,\n  xhr: xhrFactory()\n}; // Define getter/setters for config properites\n\n['GOAL_BUFFER_LENGTH', 'MAX_GOAL_BUFFER_LENGTH', 'GOAL_BUFFER_LENGTH_RATE', 'BUFFER_LOW_WATER_LINE', 'MAX_BUFFER_LOW_WATER_LINE', 'BUFFER_LOW_WATER_LINE_RATE', 'BANDWIDTH_VARIANCE'].forEach(function (prop) {\n  Object.defineProperty(Hls$1, prop, {\n    get: function get$$1() {\n      videojs$1.log.warn('using Hls.' + prop + ' is UNSAFE be sure you know what you are doing');\n      return Config[prop];\n    },\n    set: function set$$1(value) {\n      videojs$1.log.warn('using Hls.' + prop + ' is UNSAFE be sure you know what you are doing');\n\n      if (typeof value !== 'number' || value < 0) {\n        videojs$1.log.warn('value of Hls.' + prop + ' must be greater than or equal to 0');\n        return;\n      }\n\n      Config[prop] = value;\n    }\n  });\n});\nvar LOCAL_STORAGE_KEY$1 = 'videojs-vhs';\n\nvar simpleTypeFromSourceType = function simpleTypeFromSourceType(type) {\n  var mpegurlRE = /^(audio|video|application)\\/(x-|vnd\\.apple\\.)?mpegurl/i;\n\n  if (mpegurlRE.test(type)) {\n    return 'hls';\n  }\n\n  var dashRE = /^application\\/dash\\+xml/i;\n\n  if (dashRE.test(type)) {\n    return 'dash';\n  }\n\n  return null;\n};\n/**\n * Updates the selectedIndex of the QualityLevelList when a mediachange happens in hls.\n *\n * @param {QualityLevelList} qualityLevels The QualityLevelList to update.\n * @param {PlaylistLoader} playlistLoader PlaylistLoader containing the new media info.\n * @function handleHlsMediaChange\n */\n\n\nvar handleHlsMediaChange = function handleHlsMediaChange(qualityLevels, playlistLoader) {\n  var newPlaylist = playlistLoader.media();\n  var selectedIndex = -1;\n\n  for (var i = 0; i < qualityLevels.length; i++) {\n    if (qualityLevels[i].id === newPlaylist.uri) {\n      selectedIndex = i;\n      break;\n    }\n  }\n\n  qualityLevels.selectedIndex_ = selectedIndex;\n  qualityLevels.trigger({\n    selectedIndex: selectedIndex,\n    type: 'change'\n  });\n};\n/**\n * Adds quality levels to list once playlist metadata is available\n *\n * @param {QualityLevelList} qualityLevels The QualityLevelList to attach events to.\n * @param {Object} hls Hls object to listen to for media events.\n * @function handleHlsLoadedMetadata\n */\n\n\nvar handleHlsLoadedMetadata = function handleHlsLoadedMetadata(qualityLevels, hls) {\n  hls.representations().forEach(function (rep) {\n    qualityLevels.addQualityLevel(rep);\n  });\n  handleHlsMediaChange(qualityLevels, hls.playlists);\n}; // HLS is a source handler, not a tech. Make sure attempts to use it\n// as one do not cause exceptions.\n\n\nHls$1.canPlaySource = function () {\n  return videojs$1.log.warn('HLS is no longer a tech. Please remove it from ' + 'your player\\'s techOrder.');\n};\n\nvar emeKeySystems = function emeKeySystems(keySystemOptions, videoPlaylist, audioPlaylist) {\n  if (!keySystemOptions) {\n    return keySystemOptions;\n  } // upsert the content types based on the selected playlist\n\n\n  var keySystemContentTypes = {};\n\n  for (var keySystem in keySystemOptions) {\n    keySystemContentTypes[keySystem] = {\n      audioContentType: 'audio/mp4; codecs=\"' + audioPlaylist.attributes.CODECS + '\"',\n      videoContentType: 'video/mp4; codecs=\"' + videoPlaylist.attributes.CODECS + '\"'\n    };\n\n    if (videoPlaylist.contentProtection && videoPlaylist.contentProtection[keySystem] && videoPlaylist.contentProtection[keySystem].pssh) {\n      keySystemContentTypes[keySystem].pssh = videoPlaylist.contentProtection[keySystem].pssh;\n    } // videojs-contrib-eme accepts the option of specifying: 'com.some.cdm': 'url'\n    // so we need to prevent overwriting the URL entirely\n\n\n    if (typeof keySystemOptions[keySystem] === 'string') {\n      keySystemContentTypes[keySystem].url = keySystemOptions[keySystem];\n    }\n  }\n\n  return videojs$1.mergeOptions(keySystemOptions, keySystemContentTypes);\n};\n\nvar setupEmeOptions = function setupEmeOptions(hlsHandler) {\n  if (hlsHandler.options_.sourceType !== 'dash') {\n    return;\n  }\n\n  var player = videojs$1.players[hlsHandler.tech_.options_.playerId];\n\n  if (player.eme) {\n    var sourceOptions = emeKeySystems(hlsHandler.source_.keySystems, hlsHandler.playlists.media(), hlsHandler.masterPlaylistController_.mediaTypes_.AUDIO.activePlaylistLoader.media());\n\n    if (sourceOptions) {\n      player.currentSource().keySystems = sourceOptions; // works around https://bugs.chromium.org/p/chromium/issues/detail?id=895449\n\n      if (player.eme.initializeMediaKeys) {\n        player.eme.initializeMediaKeys();\n      }\n    }\n  }\n};\n\nvar getVhsLocalStorage = function getVhsLocalStorage() {\n  if (!window.localStorage) {\n    return null;\n  }\n\n  var storedObject = window.localStorage.getItem(LOCAL_STORAGE_KEY$1);\n\n  if (!storedObject) {\n    return null;\n  }\n\n  try {\n    return JSON.parse(storedObject);\n  } catch (e) {\n    // someone may have tampered with the value\n    return null;\n  }\n};\n\nvar updateVhsLocalStorage = function updateVhsLocalStorage(options) {\n  if (!window.localStorage) {\n    return false;\n  }\n\n  var objectToStore = getVhsLocalStorage();\n  objectToStore = objectToStore ? videojs$1.mergeOptions(objectToStore, options) : options;\n\n  try {\n    window.localStorage.setItem(LOCAL_STORAGE_KEY$1, JSON.stringify(objectToStore));\n  } catch (e) {\n    // Throws if storage is full (e.g., always on iOS 5+ Safari private mode, where\n    // storage is set to 0).\n    // https://developer.mozilla.org/en-US/docs/Web/API/Storage/setItem#Exceptions\n    // No need to perform any operation.\n    return false;\n  }\n\n  return objectToStore;\n};\n/**\n * Whether the browser has built-in HLS support.\n */\n\n\nHls$1.supportsNativeHls = function () {\n  var video = document.createElement('video'); // native HLS is definitely not supported if HTML5 video isn't\n\n  if (!videojs$1.getTech('Html5').isSupported()) {\n    return false;\n  } // HLS manifests can go by many mime-types\n\n\n  var canPlay = [// Apple santioned\n  'application/vnd.apple.mpegurl', // Apple sanctioned for backwards compatibility\n  'audio/mpegurl', // Very common\n  'audio/x-mpegurl', // Very common\n  'application/x-mpegurl', // Included for completeness\n  'video/x-mpegurl', 'video/mpegurl', 'application/mpegurl'];\n  return canPlay.some(function (canItPlay) {\n    return /maybe|probably/i.test(video.canPlayType(canItPlay));\n  });\n}();\n\nHls$1.supportsNativeDash = function () {\n  if (!videojs$1.getTech('Html5').isSupported()) {\n    return false;\n  }\n\n  return /maybe|probably/i.test(document.createElement('video').canPlayType('application/dash+xml'));\n}();\n\nHls$1.supportsTypeNatively = function (type) {\n  if (type === 'hls') {\n    return Hls$1.supportsNativeHls;\n  }\n\n  if (type === 'dash') {\n    return Hls$1.supportsNativeDash;\n  }\n\n  return false;\n};\n/**\n * HLS is a source handler, not a tech. Make sure attempts to use it\n * as one do not cause exceptions.\n */\n\n\nHls$1.isSupported = function () {\n  return videojs$1.log.warn('HLS is no longer a tech. Please remove it from ' + 'your player\\'s techOrder.');\n};\n\nvar Component$1 = videojs$1.getComponent('Component');\n/**\n * The Hls Handler object, where we orchestrate all of the parts\n * of HLS to interact with video.js\n *\n * @class HlsHandler\n * @extends videojs.Component\n * @param {Object} source the soruce object\n * @param {Tech} tech the parent tech object\n * @param {Object} options optional and required options\n */\n\nvar HlsHandler = function (_Component) {\n  inherits(HlsHandler, _Component);\n\n  function HlsHandler(source, tech, options) {\n    classCallCheck(this, HlsHandler); // tech.player() is deprecated but setup a reference to HLS for\n    // backwards-compatibility\n\n    var _this = possibleConstructorReturn(this, (HlsHandler.__proto__ || Object.getPrototypeOf(HlsHandler)).call(this, tech, options.hls));\n\n    if (tech.options_ && tech.options_.playerId) {\n      var _player = videojs$1(tech.options_.playerId);\n\n      if (!_player.hasOwnProperty('hls')) {\n        Object.defineProperty(_player, 'hls', {\n          get: function get$$1() {\n            videojs$1.log.warn('player.hls is deprecated. Use player.tech().hls instead.');\n            tech.trigger({\n              type: 'usage',\n              name: 'hls-player-access'\n            });\n            return _this;\n          },\n          configurable: true\n        });\n      } // Set up a reference to the HlsHandler from player.vhs. This allows users to start\n      // migrating from player.tech_.hls... to player.vhs... for API access. Although this\n      // isn't the most appropriate form of reference for video.js (since all APIs should\n      // be provided through core video.js), it is a common pattern for plugins, and vhs\n      // will act accordingly.\n\n\n      _player.vhs = _this; // deprecated, for backwards compatibility\n\n      _player.dash = _this;\n      _this.player_ = _player;\n    }\n\n    _this.tech_ = tech;\n    _this.source_ = source;\n    _this.stats = {};\n\n    _this.setOptions_();\n\n    if (_this.options_.overrideNative && tech.overrideNativeAudioTracks && tech.overrideNativeVideoTracks) {\n      tech.overrideNativeAudioTracks(true);\n      tech.overrideNativeVideoTracks(true);\n    } else if (_this.options_.overrideNative && (tech.featuresNativeVideoTracks || tech.featuresNativeAudioTracks)) {\n      // overriding native HLS only works if audio tracks have been emulated\n      // error early if we're misconfigured\n      throw new Error('Overriding native HLS requires emulated tracks. ' + 'See https://git.io/vMpjB');\n    } // listen for fullscreenchange events for this player so that we\n    // can adjust our quality selection quickly\n\n\n    _this.on(document, ['fullscreenchange', 'webkitfullscreenchange', 'mozfullscreenchange', 'MSFullscreenChange'], function (event) {\n      var fullscreenElement = document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement;\n\n      if (fullscreenElement && fullscreenElement.contains(_this.tech_.el())) {\n        _this.masterPlaylistController_.smoothQualityChange_();\n      }\n    }); // Handle seeking when looping - middleware doesn't handle this seek event from the tech\n\n\n    _this.on(_this.tech_, 'seeking', function () {\n      if (this.tech_.currentTime() === 0 && this.tech_.player_.loop()) {\n        this.setCurrentTime(0);\n      }\n    });\n\n    _this.on(_this.tech_, 'error', function () {\n      if (this.masterPlaylistController_) {\n        this.masterPlaylistController_.pauseLoading();\n      }\n    });\n\n    _this.on(_this.tech_, 'play', _this.play);\n\n    return _this;\n  }\n\n  createClass(HlsHandler, [{\n    key: 'setOptions_',\n    value: function setOptions_() {\n      var _this2 = this; // defaults\n\n\n      this.options_.withCredentials = this.options_.withCredentials || false;\n      this.options_.handleManifestRedirects = this.options_.handleManifestRedirects || false;\n      this.options_.limitRenditionByPlayerDimensions = this.options_.limitRenditionByPlayerDimensions === false ? false : true;\n      this.options_.smoothQualityChange = this.options_.smoothQualityChange || false;\n      this.options_.useBandwidthFromLocalStorage = typeof this.source_.useBandwidthFromLocalStorage !== 'undefined' ? this.source_.useBandwidthFromLocalStorage : this.options_.useBandwidthFromLocalStorage || false;\n      this.options_.customTagParsers = this.options_.customTagParsers || [];\n      this.options_.customTagMappers = this.options_.customTagMappers || [];\n      this.options_.cacheEncryptionKeys = this.options_.cacheEncryptionKeys || false;\n\n      if (typeof this.options_.blacklistDuration !== 'number') {\n        this.options_.blacklistDuration = 5 * 60;\n      }\n\n      if (typeof this.options_.bandwidth !== 'number') {\n        if (this.options_.useBandwidthFromLocalStorage) {\n          var storedObject = getVhsLocalStorage();\n\n          if (storedObject && storedObject.bandwidth) {\n            this.options_.bandwidth = storedObject.bandwidth;\n            this.tech_.trigger({\n              type: 'usage',\n              name: 'hls-bandwidth-from-local-storage'\n            });\n          }\n\n          if (storedObject && storedObject.throughput) {\n            this.options_.throughput = storedObject.throughput;\n            this.tech_.trigger({\n              type: 'usage',\n              name: 'hls-throughput-from-local-storage'\n            });\n          }\n        }\n      } // if bandwidth was not set by options or pulled from local storage, start playlist\n      // selection at a reasonable bandwidth\n\n\n      if (typeof this.options_.bandwidth !== 'number') {\n        this.options_.bandwidth = Config.INITIAL_BANDWIDTH;\n      } // If the bandwidth number is unchanged from the initial setting\n      // then this takes precedence over the enableLowInitialPlaylist option\n\n\n      this.options_.enableLowInitialPlaylist = this.options_.enableLowInitialPlaylist && this.options_.bandwidth === Config.INITIAL_BANDWIDTH; // grab options passed to player.src\n\n      ['withCredentials', 'limitRenditionByPlayerDimensions', 'bandwidth', 'smoothQualityChange', 'customTagParsers', 'customTagMappers', 'handleManifestRedirects', 'cacheEncryptionKeys'].forEach(function (option) {\n        if (typeof _this2.source_[option] !== 'undefined') {\n          _this2.options_[option] = _this2.source_[option];\n        }\n      });\n      this.limitRenditionByPlayerDimensions = this.options_.limitRenditionByPlayerDimensions;\n    }\n    /**\n     * called when player.src gets called, handle a new source\n     *\n     * @param {Object} src the source object to handle\n     */\n\n  }, {\n    key: 'src',\n    value: function src(_src, type) {\n      var _this3 = this; // do nothing if the src is falsey\n\n\n      if (!_src) {\n        return;\n      }\n\n      this.setOptions_(); // add master playlist controller options\n\n      this.options_.url = this.source_.src;\n      this.options_.tech = this.tech_;\n      this.options_.externHls = Hls$1;\n      this.options_.sourceType = simpleTypeFromSourceType(type); // Whenever we seek internally, we should update both the tech and call our own\n      // setCurrentTime function. This is needed because \"seeking\" events aren't always\n      // reliable. External seeks (via the player object) are handled via middleware.\n\n      this.options_.seekTo = function (time) {\n        _this3.tech_.setCurrentTime(time);\n\n        _this3.setCurrentTime(time);\n      };\n\n      this.masterPlaylistController_ = new MasterPlaylistController(this.options_);\n      this.playbackWatcher_ = new PlaybackWatcher(videojs$1.mergeOptions(this.options_, {\n        seekable: function seekable$$1() {\n          return _this3.seekable();\n        },\n        media: function media() {\n          return _this3.masterPlaylistController_.media();\n        }\n      }));\n      this.masterPlaylistController_.on('error', function () {\n        var player = videojs$1.players[_this3.tech_.options_.playerId];\n        player.error(_this3.masterPlaylistController_.error);\n      }); // `this` in selectPlaylist should be the HlsHandler for backwards\n      // compatibility with < v2\n\n      this.masterPlaylistController_.selectPlaylist = this.selectPlaylist ? this.selectPlaylist.bind(this) : Hls$1.STANDARD_PLAYLIST_SELECTOR.bind(this);\n      this.masterPlaylistController_.selectInitialPlaylist = Hls$1.INITIAL_PLAYLIST_SELECTOR.bind(this); // re-expose some internal objects for backwards compatibility with < v2\n\n      this.playlists = this.masterPlaylistController_.masterPlaylistLoader_;\n      this.mediaSource = this.masterPlaylistController_.mediaSource; // Proxy assignment of some properties to the master playlist\n      // controller. Using a custom property for backwards compatibility\n      // with < v2\n\n      Object.defineProperties(this, {\n        selectPlaylist: {\n          get: function get$$1() {\n            return this.masterPlaylistController_.selectPlaylist;\n          },\n          set: function set$$1(selectPlaylist) {\n            this.masterPlaylistController_.selectPlaylist = selectPlaylist.bind(this);\n          }\n        },\n        throughput: {\n          get: function get$$1() {\n            return this.masterPlaylistController_.mainSegmentLoader_.throughput.rate;\n          },\n          set: function set$$1(throughput) {\n            this.masterPlaylistController_.mainSegmentLoader_.throughput.rate = throughput; // By setting `count` to 1 the throughput value becomes the starting value\n            // for the cumulative average\n\n            this.masterPlaylistController_.mainSegmentLoader_.throughput.count = 1;\n          }\n        },\n        bandwidth: {\n          get: function get$$1() {\n            return this.masterPlaylistController_.mainSegmentLoader_.bandwidth;\n          },\n          set: function set$$1(bandwidth) {\n            this.masterPlaylistController_.mainSegmentLoader_.bandwidth = bandwidth; // setting the bandwidth manually resets the throughput counter\n            // `count` is set to zero that current value of `rate` isn't included\n            // in the cumulative average\n\n            this.masterPlaylistController_.mainSegmentLoader_.throughput = {\n              rate: 0,\n              count: 0\n            };\n          }\n        },\n\n        /**\n         * `systemBandwidth` is a combination of two serial processes bit-rates. The first\n         * is the network bitrate provided by `bandwidth` and the second is the bitrate of\n         * the entire process after that - decryption, transmuxing, and appending - provided\n         * by `throughput`.\n         *\n         * Since the two process are serial, the overall system bandwidth is given by:\n         *   sysBandwidth = 1 / (1 / bandwidth + 1 / throughput)\n         */\n        systemBandwidth: {\n          get: function get$$1() {\n            var invBandwidth = 1 / (this.bandwidth || 1);\n            var invThroughput = void 0;\n\n            if (this.throughput > 0) {\n              invThroughput = 1 / this.throughput;\n            } else {\n              invThroughput = 0;\n            }\n\n            var systemBitrate = Math.floor(1 / (invBandwidth + invThroughput));\n            return systemBitrate;\n          },\n          set: function set$$1() {\n            videojs$1.log.error('The \"systemBandwidth\" property is read-only');\n          }\n        }\n      });\n\n      if (this.options_.bandwidth) {\n        this.bandwidth = this.options_.bandwidth;\n      }\n\n      if (this.options_.throughput) {\n        this.throughput = this.options_.throughput;\n      }\n\n      Object.defineProperties(this.stats, {\n        bandwidth: {\n          get: function get$$1() {\n            return _this3.bandwidth || 0;\n          },\n          enumerable: true\n        },\n        mediaRequests: {\n          get: function get$$1() {\n            return _this3.masterPlaylistController_.mediaRequests_() || 0;\n          },\n          enumerable: true\n        },\n        mediaRequestsAborted: {\n          get: function get$$1() {\n            return _this3.masterPlaylistController_.mediaRequestsAborted_() || 0;\n          },\n          enumerable: true\n        },\n        mediaRequestsTimedout: {\n          get: function get$$1() {\n            return _this3.masterPlaylistController_.mediaRequestsTimedout_() || 0;\n          },\n          enumerable: true\n        },\n        mediaRequestsErrored: {\n          get: function get$$1() {\n            return _this3.masterPlaylistController_.mediaRequestsErrored_() || 0;\n          },\n          enumerable: true\n        },\n        mediaTransferDuration: {\n          get: function get$$1() {\n            return _this3.masterPlaylistController_.mediaTransferDuration_() || 0;\n          },\n          enumerable: true\n        },\n        mediaBytesTransferred: {\n          get: function get$$1() {\n            return _this3.masterPlaylistController_.mediaBytesTransferred_() || 0;\n          },\n          enumerable: true\n        },\n        mediaSecondsLoaded: {\n          get: function get$$1() {\n            return _this3.masterPlaylistController_.mediaSecondsLoaded_() || 0;\n          },\n          enumerable: true\n        },\n        buffered: {\n          get: function get$$1() {\n            return timeRangesToArray(_this3.tech_.buffered());\n          },\n          enumerable: true\n        },\n        currentTime: {\n          get: function get$$1() {\n            return _this3.tech_.currentTime();\n          },\n          enumerable: true\n        },\n        currentSource: {\n          get: function get$$1() {\n            return _this3.tech_.currentSource_;\n          },\n          enumerable: true\n        },\n        currentTech: {\n          get: function get$$1() {\n            return _this3.tech_.name_;\n          },\n          enumerable: true\n        },\n        duration: {\n          get: function get$$1() {\n            return _this3.tech_.duration();\n          },\n          enumerable: true\n        },\n        master: {\n          get: function get$$1() {\n            return _this3.playlists.master;\n          },\n          enumerable: true\n        },\n        playerDimensions: {\n          get: function get$$1() {\n            return _this3.tech_.currentDimensions();\n          },\n          enumerable: true\n        },\n        seekable: {\n          get: function get$$1() {\n            return timeRangesToArray(_this3.tech_.seekable());\n          },\n          enumerable: true\n        },\n        timestamp: {\n          get: function get$$1() {\n            return Date.now();\n          },\n          enumerable: true\n        },\n        videoPlaybackQuality: {\n          get: function get$$1() {\n            return _this3.tech_.getVideoPlaybackQuality();\n          },\n          enumerable: true\n        }\n      });\n      this.tech_.one('canplay', this.masterPlaylistController_.setupFirstPlay.bind(this.masterPlaylistController_));\n      this.tech_.on('bandwidthupdate', function () {\n        if (_this3.options_.useBandwidthFromLocalStorage) {\n          updateVhsLocalStorage({\n            bandwidth: _this3.bandwidth,\n            throughput: Math.round(_this3.throughput)\n          });\n        }\n      });\n      this.masterPlaylistController_.on('selectedinitialmedia', function () {\n        // Add the manual rendition mix-in to HlsHandler\n        renditionSelectionMixin(_this3);\n        setupEmeOptions(_this3);\n      }); // the bandwidth of the primary segment loader is our best\n      // estimate of overall bandwidth\n\n      this.on(this.masterPlaylistController_, 'progress', function () {\n        this.tech_.trigger('progress');\n      });\n      this.tech_.ready(function () {\n        return _this3.setupQualityLevels_();\n      }); // do nothing if the tech has been disposed already\n      // this can occur if someone sets the src in player.ready(), for instance\n\n      if (!this.tech_.el()) {\n        return;\n      }\n\n      this.tech_.src(videojs$1.URL.createObjectURL(this.masterPlaylistController_.mediaSource));\n    }\n    /**\n     * Initializes the quality levels and sets listeners to update them.\n     *\n     * @method setupQualityLevels_\n     * @private\n     */\n\n  }, {\n    key: 'setupQualityLevels_',\n    value: function setupQualityLevels_() {\n      var _this4 = this;\n\n      var player = videojs$1.players[this.tech_.options_.playerId];\n\n      if (player && player.qualityLevels) {\n        this.qualityLevels_ = player.qualityLevels();\n        this.masterPlaylistController_.on('selectedinitialmedia', function () {\n          handleHlsLoadedMetadata(_this4.qualityLevels_, _this4);\n        });\n        this.playlists.on('mediachange', function () {\n          handleHlsMediaChange(_this4.qualityLevels_, _this4.playlists);\n        });\n      }\n    }\n    /**\n     * Begin playing the video.\n     */\n\n  }, {\n    key: 'play',\n    value: function play() {\n      this.masterPlaylistController_.play();\n    }\n    /**\n     * a wrapper around the function in MasterPlaylistController\n     */\n\n  }, {\n    key: 'setCurrentTime',\n    value: function setCurrentTime(currentTime) {\n      this.masterPlaylistController_.setCurrentTime(currentTime);\n    }\n    /**\n     * a wrapper around the function in MasterPlaylistController\n     */\n\n  }, {\n    key: 'duration',\n    value: function duration$$1() {\n      return this.masterPlaylistController_.duration();\n    }\n    /**\n     * a wrapper around the function in MasterPlaylistController\n     */\n\n  }, {\n    key: 'seekable',\n    value: function seekable$$1() {\n      return this.masterPlaylistController_.seekable();\n    }\n    /**\n     * Abort all outstanding work and cleanup.\n     */\n\n  }, {\n    key: 'dispose',\n    value: function dispose() {\n      if (this.playbackWatcher_) {\n        this.playbackWatcher_.dispose();\n      }\n\n      if (this.masterPlaylistController_) {\n        this.masterPlaylistController_.dispose();\n      }\n\n      if (this.qualityLevels_) {\n        this.qualityLevels_.dispose();\n      }\n\n      if (this.player_) {\n        delete this.player_.vhs;\n        delete this.player_.dash;\n        delete this.player_.hls;\n      }\n\n      if (this.tech_ && this.tech_.hls) {\n        delete this.tech_.hls;\n      }\n\n      get$1(HlsHandler.prototype.__proto__ || Object.getPrototypeOf(HlsHandler.prototype), 'dispose', this).call(this);\n    }\n  }, {\n    key: 'convertToProgramTime',\n    value: function convertToProgramTime(time, callback) {\n      return getProgramTime({\n        playlist: this.masterPlaylistController_.media(),\n        time: time,\n        callback: callback\n      });\n    } // the player must be playing before calling this\n\n  }, {\n    key: 'seekToProgramTime',\n    value: function seekToProgramTime$$1(programTime, callback) {\n      var pauseAfterSeek = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : true;\n      var retryCount = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 2;\n      return seekToProgramTime({\n        programTime: programTime,\n        playlist: this.masterPlaylistController_.media(),\n        retryCount: retryCount,\n        pauseAfterSeek: pauseAfterSeek,\n        seekTo: this.options_.seekTo,\n        tech: this.options_.tech,\n        callback: callback\n      });\n    }\n  }]);\n  return HlsHandler;\n}(Component$1);\n/**\n * The Source Handler object, which informs video.js what additional\n * MIME types are supported and sets up playback. It is registered\n * automatically to the appropriate tech based on the capabilities of\n * the browser it is running in. It is not necessary to use or modify\n * this object in normal usage.\n */\n\n\nvar HlsSourceHandler = {\n  name: 'videojs-http-streaming',\n  VERSION: version$1,\n  canHandleSource: function canHandleSource(srcObj) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    var localOptions = videojs$1.mergeOptions(videojs$1.options, options);\n    return HlsSourceHandler.canPlayType(srcObj.type, localOptions);\n  },\n  handleSource: function handleSource(source, tech) {\n    var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};\n    var localOptions = videojs$1.mergeOptions(videojs$1.options, options);\n    tech.hls = new HlsHandler(source, tech, localOptions);\n    tech.hls.xhr = xhrFactory();\n    tech.hls.src(source.src, source.type);\n    return tech.hls;\n  },\n  canPlayType: function canPlayType(type) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n\n    var _videojs$mergeOptions = videojs$1.mergeOptions(videojs$1.options, options),\n        overrideNative = _videojs$mergeOptions.hls.overrideNative;\n\n    var supportedType = simpleTypeFromSourceType(type);\n    var canUseMsePlayback = supportedType && (!Hls$1.supportsTypeNatively(supportedType) || overrideNative);\n    return canUseMsePlayback ? 'maybe' : '';\n  }\n};\n\nif (typeof videojs$1.MediaSource === 'undefined' || typeof videojs$1.URL === 'undefined') {\n  videojs$1.MediaSource = MediaSource;\n  videojs$1.URL = URL$1;\n} // register source handlers with the appropriate techs\n\n\nif (MediaSource.supportsNativeMediaSources()) {\n  videojs$1.getTech('Html5').registerSourceHandler(HlsSourceHandler, 0);\n}\n\nvideojs$1.HlsHandler = HlsHandler;\nvideojs$1.HlsSourceHandler = HlsSourceHandler;\nvideojs$1.Hls = Hls$1;\n\nif (!videojs$1.use) {\n  videojs$1.registerComponent('Hls', Hls$1);\n}\n\nvideojs$1.options.hls = videojs$1.options.hls || {};\n\nif (videojs$1.registerPlugin) {\n  videojs$1.registerPlugin('reloadSourceOnError', reloadSourceOnError);\n} else {\n  videojs$1.plugin('reloadSourceOnError', reloadSourceOnError);\n}\n\nexport default videojs$1;","'use strict';\n\nrequire('../../style/css');\n\nrequire('./index.css');","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _classCallCheck2 = require('babel-runtime/helpers/classCallCheck');\n\nvar _classCallCheck3 = _interopRequireDefault(_classCallCheck2);\n\nvar _createClass2 = require('babel-runtime/helpers/createClass');\n\nvar _createClass3 = _interopRequireDefault(_createClass2);\n\nvar _possibleConstructorReturn2 = require('babel-runtime/helpers/possibleConstructorReturn');\n\nvar _possibleConstructorReturn3 = _interopRequireDefault(_possibleConstructorReturn2);\n\nvar _inherits2 = require('babel-runtime/helpers/inherits');\n\nvar _inherits3 = _interopRequireDefault(_inherits2);\n\nvar _rcCollapse = require('rc-collapse');\n\nvar _rcCollapse2 = _interopRequireDefault(_rcCollapse);\n\nvar _react = require('react');\n\nvar React = _interopRequireWildcard(_react);\n\nfunction _interopRequireWildcard(obj) {\n  if (obj && obj.__esModule) {\n    return obj;\n  } else {\n    var newObj = {};\n\n    if (obj != null) {\n      for (var key in obj) {\n        if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key];\n      }\n    }\n\n    newObj['default'] = obj;\n    return newObj;\n  }\n}\n\nfunction _interopRequireDefault(obj) {\n  return obj && obj.__esModule ? obj : {\n    'default': obj\n  };\n}\n\nvar Accordion = function (_React$Component) {\n  (0, _inherits3['default'])(Accordion, _React$Component);\n\n  function Accordion() {\n    (0, _classCallCheck3['default'])(this, Accordion);\n    return (0, _possibleConstructorReturn3['default'])(this, (Accordion.__proto__ || Object.getPrototypeOf(Accordion)).apply(this, arguments));\n  }\n\n  (0, _createClass3['default'])(Accordion, [{\n    key: 'render',\n    value: function render() {\n      return React.createElement(_rcCollapse2['default'], this.props);\n    }\n  }]);\n  return Accordion;\n}(React.Component);\n\nexports['default'] = Accordion;\nAccordion.Panel = _rcCollapse.Panel;\nAccordion.defaultProps = {\n  prefixCls: 'am-accordion'\n};\nmodule.exports = exports['default'];","var topLevel = typeof global !== 'undefined' ? global : typeof window !== 'undefined' ? window : {};\n\nvar minDoc = require('min-document');\n\nvar doccy;\n\nif (typeof document !== 'undefined') {\n  doccy = document;\n} else {\n  doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'];\n\n  if (!doccy) {\n    doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'] = minDoc;\n  }\n}\n\nmodule.exports = doccy;","module.exports = SafeParseTuple;\n\nfunction SafeParseTuple(obj, reviver) {\n  var json;\n  var error = null;\n\n  try {\n    json = JSON.parse(obj, reviver);\n  } catch (err) {\n    error = err;\n  }\n\n  return [error, json];\n}","// Source: http://jsfiddle.net/vWx8V/\n// http://stackoverflow.com/questions/5603195/full-list-of-javascript-keycodes\n\n/**\n * Conenience method returns corresponding value for given keyName or keyCode.\n *\n * @param {Mixed} keyCode {Number} or keyName {String}\n * @return {Mixed}\n * @api public\n */\nfunction keyCode(searchInput) {\n  // Keyboard Events\n  if (searchInput && 'object' === typeof searchInput) {\n    var hasKeyCode = searchInput.which || searchInput.keyCode || searchInput.charCode;\n    if (hasKeyCode) searchInput = hasKeyCode;\n  } // Numbers\n\n\n  if ('number' === typeof searchInput) return names[searchInput]; // Everything else (cast to string)\n\n  var search = String(searchInput); // check codes\n\n  var foundNamedKey = codes[search.toLowerCase()];\n  if (foundNamedKey) return foundNamedKey; // check aliases\n\n  var foundNamedKey = aliases[search.toLowerCase()];\n  if (foundNamedKey) return foundNamedKey; // weird character?\n\n  if (search.length === 1) return search.charCodeAt(0);\n  return undefined;\n}\n/**\n * Compares a keyboard event with a given keyCode or keyName.\n *\n * @param {Event} event Keyboard event that should be tested\n * @param {Mixed} keyCode {Number} or keyName {String}\n * @return {Boolean}\n * @api public\n */\n\n\nkeyCode.isEventKey = function isEventKey(event, nameOrCode) {\n  if (event && 'object' === typeof event) {\n    var keyCode = event.which || event.keyCode || event.charCode;\n\n    if (keyCode === null || keyCode === undefined) {\n      return false;\n    }\n\n    if (typeof nameOrCode === 'string') {\n      // check codes\n      var foundNamedKey = codes[nameOrCode.toLowerCase()];\n\n      if (foundNamedKey) {\n        return foundNamedKey === keyCode;\n      } // check aliases\n\n\n      var foundNamedKey = aliases[nameOrCode.toLowerCase()];\n\n      if (foundNamedKey) {\n        return foundNamedKey === keyCode;\n      }\n    } else if (typeof nameOrCode === 'number') {\n      return nameOrCode === keyCode;\n    }\n\n    return false;\n  }\n};\n\nexports = module.exports = keyCode;\n/**\n * Get by name\n *\n *   exports.code['enter'] // => 13\n */\n\nvar codes = exports.code = exports.codes = {\n  'backspace': 8,\n  'tab': 9,\n  'enter': 13,\n  'shift': 16,\n  'ctrl': 17,\n  'alt': 18,\n  'pause/break': 19,\n  'caps lock': 20,\n  'esc': 27,\n  'space': 32,\n  'page up': 33,\n  'page down': 34,\n  'end': 35,\n  'home': 36,\n  'left': 37,\n  'up': 38,\n  'right': 39,\n  'down': 40,\n  'insert': 45,\n  'delete': 46,\n  'command': 91,\n  'left command': 91,\n  'right command': 93,\n  'numpad *': 106,\n  'numpad +': 107,\n  'numpad -': 109,\n  'numpad .': 110,\n  'numpad /': 111,\n  'num lock': 144,\n  'scroll lock': 145,\n  'my computer': 182,\n  'my calculator': 183,\n  ';': 186,\n  '=': 187,\n  ',': 188,\n  '-': 189,\n  '.': 190,\n  '/': 191,\n  '`': 192,\n  '[': 219,\n  '\\\\': 220,\n  ']': 221,\n  \"'\": 222 // Helper aliases\n\n};\nvar aliases = exports.aliases = {\n  'windows': 91,\n  '⇧': 16,\n  '⌥': 18,\n  '⌃': 17,\n  '⌘': 91,\n  'ctl': 17,\n  'control': 17,\n  'option': 18,\n  'pause': 19,\n  'break': 19,\n  'caps': 20,\n  'return': 13,\n  'escape': 27,\n  'spc': 32,\n  'spacebar': 32,\n  'pgup': 33,\n  'pgdn': 34,\n  'ins': 45,\n  'del': 46,\n  'cmd': 91\n  /*!\n   * Programatically add the following\n   */\n  // lower case chars\n\n};\n\nfor (i = 97; i < 123; i++) {\n  codes[String.fromCharCode(i)] = i - 32;\n} // numbers\n\n\nfor (var i = 48; i < 58; i++) {\n  codes[i - 48] = i;\n} // function keys\n\n\nfor (i = 1; i < 13; i++) {\n  codes['f' + i] = i + 111;\n} // numpad keys\n\n\nfor (i = 0; i < 10; i++) {\n  codes['numpad ' + i] = i + 96;\n}\n/**\n * Get by code\n *\n *   exports.name[13] // => 'Enter'\n */\n\n\nvar names = exports.names = exports.title = {}; // title for backward compat\n// Create reverse mapping\n\nfor (i in codes) {\n  names[codes[i]] = i;\n} // Add aliases\n\n\nfor (var alias in aliases) {\n  codes[alias] = aliases[alias];\n}","\"use strict\";\n\nvar window = require(\"global/window\");\n\nvar isFunction = require(\"is-function\");\n\nvar parseHeaders = require(\"parse-headers\");\n\nvar xtend = require(\"xtend\");\n\nmodule.exports = createXHR;\ncreateXHR.XMLHttpRequest = window.XMLHttpRequest || noop;\ncreateXHR.XDomainRequest = \"withCredentials\" in new createXHR.XMLHttpRequest() ? createXHR.XMLHttpRequest : window.XDomainRequest;\nforEachArray([\"get\", \"put\", \"post\", \"patch\", \"head\", \"delete\"], function (method) {\n  createXHR[method === \"delete\" ? \"del\" : method] = function (uri, options, callback) {\n    options = initParams(uri, options, callback);\n    options.method = method.toUpperCase();\n    return _createXHR(options);\n  };\n});\n\nfunction forEachArray(array, iterator) {\n  for (var i = 0; i < array.length; i++) {\n    iterator(array[i]);\n  }\n}\n\nfunction isEmpty(obj) {\n  for (var i in obj) {\n    if (obj.hasOwnProperty(i)) return false;\n  }\n\n  return true;\n}\n\nfunction initParams(uri, options, callback) {\n  var params = uri;\n\n  if (isFunction(options)) {\n    callback = options;\n\n    if (typeof uri === \"string\") {\n      params = {\n        uri: uri\n      };\n    }\n  } else {\n    params = xtend(options, {\n      uri: uri\n    });\n  }\n\n  params.callback = callback;\n  return params;\n}\n\nfunction createXHR(uri, options, callback) {\n  options = initParams(uri, options, callback);\n  return _createXHR(options);\n}\n\nfunction _createXHR(options) {\n  if (typeof options.callback === \"undefined\") {\n    throw new Error(\"callback argument missing\");\n  }\n\n  var called = false;\n\n  var callback = function cbOnce(err, response, body) {\n    if (!called) {\n      called = true;\n      options.callback(err, response, body);\n    }\n  };\n\n  function readystatechange() {\n    if (xhr.readyState === 4) {\n      setTimeout(loadFunc, 0);\n    }\n  }\n\n  function getBody() {\n    // Chrome with requestType=blob throws errors arround when even testing access to responseText\n    var body = undefined;\n\n    if (xhr.response) {\n      body = xhr.response;\n    } else {\n      body = xhr.responseText || getXml(xhr);\n    }\n\n    if (isJson) {\n      try {\n        body = JSON.parse(body);\n      } catch (e) {}\n    }\n\n    return body;\n  }\n\n  function errorFunc(evt) {\n    clearTimeout(timeoutTimer);\n\n    if (!(evt instanceof Error)) {\n      evt = new Error(\"\" + (evt || \"Unknown XMLHttpRequest Error\"));\n    }\n\n    evt.statusCode = 0;\n    return callback(evt, failureResponse);\n  } // will load the data & process the response in a special response object\n\n\n  function loadFunc() {\n    if (aborted) return;\n    var status;\n    clearTimeout(timeoutTimer);\n\n    if (options.useXDR && xhr.status === undefined) {\n      //IE8 CORS GET successful response doesn't have a status field, but body is fine\n      status = 200;\n    } else {\n      status = xhr.status === 1223 ? 204 : xhr.status;\n    }\n\n    var response = failureResponse;\n    var err = null;\n\n    if (status !== 0) {\n      response = {\n        body: getBody(),\n        statusCode: status,\n        method: method,\n        headers: {},\n        url: uri,\n        rawRequest: xhr\n      };\n\n      if (xhr.getAllResponseHeaders) {\n        //remember xhr can in fact be XDR for CORS in IE\n        response.headers = parseHeaders(xhr.getAllResponseHeaders());\n      }\n    } else {\n      err = new Error(\"Internal XMLHttpRequest Error\");\n    }\n\n    return callback(err, response, response.body);\n  }\n\n  var xhr = options.xhr || null;\n\n  if (!xhr) {\n    if (options.cors || options.useXDR) {\n      xhr = new createXHR.XDomainRequest();\n    } else {\n      xhr = new createXHR.XMLHttpRequest();\n    }\n  }\n\n  var key;\n  var aborted;\n  var uri = xhr.url = options.uri || options.url;\n  var method = xhr.method = options.method || \"GET\";\n  var body = options.body || options.data;\n  var headers = xhr.headers = options.headers || {};\n  var sync = !!options.sync;\n  var isJson = false;\n  var timeoutTimer;\n  var failureResponse = {\n    body: undefined,\n    headers: {},\n    statusCode: 0,\n    method: method,\n    url: uri,\n    rawRequest: xhr\n  };\n\n  if (\"json\" in options && options.json !== false) {\n    isJson = true;\n    headers[\"accept\"] || headers[\"Accept\"] || (headers[\"Accept\"] = \"application/json\"); //Don't override existing accept header declared by user\n\n    if (method !== \"GET\" && method !== \"HEAD\") {\n      headers[\"content-type\"] || headers[\"Content-Type\"] || (headers[\"Content-Type\"] = \"application/json\"); //Don't override existing accept header declared by user\n\n      body = JSON.stringify(options.json === true ? body : options.json);\n    }\n  }\n\n  xhr.onreadystatechange = readystatechange;\n  xhr.onload = loadFunc;\n  xhr.onerror = errorFunc; // IE9 must have onprogress be set to a unique function.\n\n  xhr.onprogress = function () {// IE must die\n  };\n\n  xhr.onabort = function () {\n    aborted = true;\n  };\n\n  xhr.ontimeout = errorFunc;\n  xhr.open(method, uri, !sync, options.username, options.password); //has to be after open\n\n  if (!sync) {\n    xhr.withCredentials = !!options.withCredentials;\n  } // Cannot set timeout with sync request\n  // not setting timeout on the xhr object, because of old webkits etc. not handling that correctly\n  // both npm's request and jquery 1.x use this kind of timeout, so this is being consistent\n\n\n  if (!sync && options.timeout > 0) {\n    timeoutTimer = setTimeout(function () {\n      if (aborted) return;\n      aborted = true; //IE9 may still call readystatechange\n\n      xhr.abort(\"timeout\");\n      var e = new Error(\"XMLHttpRequest timeout\");\n      e.code = \"ETIMEDOUT\";\n      errorFunc(e);\n    }, options.timeout);\n  }\n\n  if (xhr.setRequestHeader) {\n    for (key in headers) {\n      if (headers.hasOwnProperty(key)) {\n        xhr.setRequestHeader(key, headers[key]);\n      }\n    }\n  } else if (options.headers && !isEmpty(options.headers)) {\n    throw new Error(\"Headers cannot be set on an XDomainRequest object\");\n  }\n\n  if (\"responseType\" in options) {\n    xhr.responseType = options.responseType;\n  }\n\n  if (\"beforeSend\" in options && typeof options.beforeSend === \"function\") {\n    options.beforeSend(xhr);\n  } // Microsoft Edge browser sends \"undefined\" when send is called with undefined value.\n  // XMLHttpRequest spec says to pass null as body to indicate no body\n  // See https://github.com/naugtur/xhr/issues/100.\n\n\n  xhr.send(body || null);\n  return xhr;\n}\n\nfunction getXml(xhr) {\n  if (xhr.responseType === \"document\") {\n    return xhr.responseXML;\n  }\n\n  var firefoxBugTakenEffect = xhr.responseXML && xhr.responseXML.documentElement.nodeName === \"parsererror\";\n\n  if (xhr.responseType === \"\" && !firefoxBugTakenEffect) {\n    return xhr.responseXML;\n  }\n\n  return null;\n}\n\nfunction noop() {}","module.exports = isFunction;\nvar toString = Object.prototype.toString;\n\nfunction isFunction(fn) {\n  var string = toString.call(fn);\n  return string === '[object Function]' || typeof fn === 'function' && string !== '[object RegExp]' || typeof window !== 'undefined' && ( // IE8 and below\n  fn === window.setTimeout || fn === window.alert || fn === window.confirm || fn === window.prompt);\n}\n\n;","var trim = require('string.prototype.trim'),\n    forEach = require('for-each'),\n    isArray = function isArray(arg) {\n  return Object.prototype.toString.call(arg) === '[object Array]';\n};\n\nmodule.exports = function (headers) {\n  if (!headers) return {};\n  var result = {};\n  forEach(trim(headers).split('\\n'), function (row) {\n    var index = row.indexOf(':'),\n        key = trim(row.slice(0, index)).toLowerCase(),\n        value = trim(row.slice(index + 1));\n\n    if (typeof result[key] === 'undefined') {\n      result[key] = value;\n    } else if (isArray(result[key])) {\n      result[key].push(value);\n    } else {\n      result[key] = [result[key], value];\n    }\n  });\n  return result;\n};","'use strict';\n\nvar bind = require('function-bind');\n\nvar define = require('define-properties');\n\nvar implementation = require('./implementation');\n\nvar getPolyfill = require('./polyfill');\n\nvar shim = require('./shim');\n\nvar boundTrim = bind.call(Function.call, getPolyfill());\ndefine(boundTrim, {\n  getPolyfill: getPolyfill,\n  implementation: implementation,\n  shim: shim\n});\nmodule.exports = boundTrim;","'use strict';\n/* eslint no-invalid-this: 1 */\n\nvar ERROR_MESSAGE = 'Function.prototype.bind called on incompatible ';\nvar slice = Array.prototype.slice;\nvar toStr = Object.prototype.toString;\nvar funcType = '[object Function]';\n\nmodule.exports = function bind(that) {\n  var target = this;\n\n  if (typeof target !== 'function' || toStr.call(target) !== funcType) {\n    throw new TypeError(ERROR_MESSAGE + target);\n  }\n\n  var args = slice.call(arguments, 1);\n  var bound;\n\n  var binder = function binder() {\n    if (this instanceof bound) {\n      var result = target.apply(this, args.concat(slice.call(arguments)));\n\n      if (Object(result) === result) {\n        return result;\n      }\n\n      return this;\n    } else {\n      return target.apply(that, args.concat(slice.call(arguments)));\n    }\n  };\n\n  var boundLength = Math.max(0, target.length - args.length);\n  var boundArgs = [];\n\n  for (var i = 0; i < boundLength; i++) {\n    boundArgs.push('$' + i);\n  }\n\n  bound = Function('binder', 'return function (' + boundArgs.join(',') + '){ return binder.apply(this,arguments); }')(binder);\n\n  if (target.prototype) {\n    var Empty = function Empty() {};\n\n    Empty.prototype = target.prototype;\n    bound.prototype = new Empty();\n    Empty.prototype = null;\n  }\n\n  return bound;\n};","'use strict';\n\nvar slice = Array.prototype.slice;\n\nvar isArgs = require('./isArguments');\n\nvar origKeys = Object.keys;\nvar keysShim = origKeys ? function keys(o) {\n  return origKeys(o);\n} : require('./implementation');\nvar originalKeys = Object.keys;\n\nkeysShim.shim = function shimObjectKeys() {\n  if (Object.keys) {\n    var keysWorksWithArguments = function () {\n      // Safari 5.0 bug\n      var args = Object.keys(arguments);\n      return args && args.length === arguments.length;\n    }(1, 2);\n\n    if (!keysWorksWithArguments) {\n      Object.keys = function keys(object) {\n        // eslint-disable-line func-name-matching\n        if (isArgs(object)) {\n          return originalKeys(slice.call(object));\n        }\n\n        return originalKeys(object);\n      };\n    }\n  } else {\n    Object.keys = keysShim;\n  }\n\n  return Object.keys || keysShim;\n};\n\nmodule.exports = keysShim;","'use strict';\n\nvar keysShim;\n\nif (!Object.keys) {\n  // modified from https://github.com/es-shims/es5-shim\n  var has = Object.prototype.hasOwnProperty;\n  var toStr = Object.prototype.toString;\n\n  var isArgs = require('./isArguments'); // eslint-disable-line global-require\n\n\n  var isEnumerable = Object.prototype.propertyIsEnumerable;\n  var hasDontEnumBug = !isEnumerable.call({\n    toString: null\n  }, 'toString');\n  var hasProtoEnumBug = isEnumerable.call(function () {}, 'prototype');\n  var dontEnums = ['toString', 'toLocaleString', 'valueOf', 'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable', 'constructor'];\n\n  var equalsConstructorPrototype = function equalsConstructorPrototype(o) {\n    var ctor = o.constructor;\n    return ctor && ctor.prototype === o;\n  };\n\n  var excludedKeys = {\n    $applicationCache: true,\n    $console: true,\n    $external: true,\n    $frame: true,\n    $frameElement: true,\n    $frames: true,\n    $innerHeight: true,\n    $innerWidth: true,\n    $onmozfullscreenchange: true,\n    $onmozfullscreenerror: true,\n    $outerHeight: true,\n    $outerWidth: true,\n    $pageXOffset: true,\n    $pageYOffset: true,\n    $parent: true,\n    $scrollLeft: true,\n    $scrollTop: true,\n    $scrollX: true,\n    $scrollY: true,\n    $self: true,\n    $webkitIndexedDB: true,\n    $webkitStorageInfo: true,\n    $window: true\n  };\n\n  var hasAutomationEqualityBug = function () {\n    /* global window */\n    if (typeof window === 'undefined') {\n      return false;\n    }\n\n    for (var k in window) {\n      try {\n        if (!excludedKeys['$' + k] && has.call(window, k) && window[k] !== null && typeof window[k] === 'object') {\n          try {\n            equalsConstructorPrototype(window[k]);\n          } catch (e) {\n            return true;\n          }\n        }\n      } catch (e) {\n        return true;\n      }\n    }\n\n    return false;\n  }();\n\n  var equalsConstructorPrototypeIfNotBuggy = function equalsConstructorPrototypeIfNotBuggy(o) {\n    /* global window */\n    if (typeof window === 'undefined' || !hasAutomationEqualityBug) {\n      return equalsConstructorPrototype(o);\n    }\n\n    try {\n      return equalsConstructorPrototype(o);\n    } catch (e) {\n      return false;\n    }\n  };\n\n  keysShim = function keys(object) {\n    var isObject = object !== null && typeof object === 'object';\n    var isFunction = toStr.call(object) === '[object Function]';\n    var isArguments = isArgs(object);\n    var isString = isObject && toStr.call(object) === '[object String]';\n    var theKeys = [];\n\n    if (!isObject && !isFunction && !isArguments) {\n      throw new TypeError('Object.keys called on a non-object');\n    }\n\n    var skipProto = hasProtoEnumBug && isFunction;\n\n    if (isString && object.length > 0 && !has.call(object, 0)) {\n      for (var i = 0; i < object.length; ++i) {\n        theKeys.push(String(i));\n      }\n    }\n\n    if (isArguments && object.length > 0) {\n      for (var j = 0; j < object.length; ++j) {\n        theKeys.push(String(j));\n      }\n    } else {\n      for (var name in object) {\n        if (!(skipProto && name === 'prototype') && has.call(object, name)) {\n          theKeys.push(String(name));\n        }\n      }\n    }\n\n    if (hasDontEnumBug) {\n      var skipConstructor = equalsConstructorPrototypeIfNotBuggy(object);\n\n      for (var k = 0; k < dontEnums.length; ++k) {\n        if (!(skipConstructor && dontEnums[k] === 'constructor') && has.call(object, dontEnums[k])) {\n          theKeys.push(dontEnums[k]);\n        }\n      }\n    }\n\n    return theKeys;\n  };\n}\n\nmodule.exports = keysShim;","'use strict';\n\nvar GetIntrinsic = require('./GetIntrinsic');\n\nvar $Object = GetIntrinsic('%Object%');\nvar $TypeError = GetIntrinsic('%TypeError%');\nvar $String = GetIntrinsic('%String%');\n\nvar assertRecord = require('./helpers/assertRecord');\n\nvar $isNaN = require('./helpers/isNaN');\n\nvar $isFinite = require('./helpers/isFinite');\n\nvar sign = require('./helpers/sign');\n\nvar mod = require('./helpers/mod');\n\nvar IsCallable = require('is-callable');\n\nvar toPrimitive = require('es-to-primitive/es5');\n\nvar has = require('has'); // https://es5.github.io/#x9\n\n\nvar ES5 = {\n  ToPrimitive: toPrimitive,\n  ToBoolean: function ToBoolean(value) {\n    return !!value;\n  },\n  ToNumber: function ToNumber(value) {\n    return +value; // eslint-disable-line no-implicit-coercion\n  },\n  ToInteger: function ToInteger(value) {\n    var number = this.ToNumber(value);\n\n    if ($isNaN(number)) {\n      return 0;\n    }\n\n    if (number === 0 || !$isFinite(number)) {\n      return number;\n    }\n\n    return sign(number) * Math.floor(Math.abs(number));\n  },\n  ToInt32: function ToInt32(x) {\n    return this.ToNumber(x) >> 0;\n  },\n  ToUint32: function ToUint32(x) {\n    return this.ToNumber(x) >>> 0;\n  },\n  ToUint16: function ToUint16(value) {\n    var number = this.ToNumber(value);\n\n    if ($isNaN(number) || number === 0 || !$isFinite(number)) {\n      return 0;\n    }\n\n    var posInt = sign(number) * Math.floor(Math.abs(number));\n    return mod(posInt, 0x10000);\n  },\n  ToString: function ToString(value) {\n    return $String(value);\n  },\n  ToObject: function ToObject(value) {\n    this.CheckObjectCoercible(value);\n    return $Object(value);\n  },\n  CheckObjectCoercible: function CheckObjectCoercible(value, optMessage) {\n    /* jshint eqnull:true */\n    if (value == null) {\n      throw new $TypeError(optMessage || 'Cannot call method on ' + value);\n    }\n\n    return value;\n  },\n  IsCallable: IsCallable,\n  SameValue: function SameValue(x, y) {\n    if (x === y) {\n      // 0 === -0, but they are not identical.\n      if (x === 0) {\n        return 1 / x === 1 / y;\n      }\n\n      return true;\n    }\n\n    return $isNaN(x) && $isNaN(y);\n  },\n  // https://www.ecma-international.org/ecma-262/5.1/#sec-8\n  Type: function Type(x) {\n    if (x === null) {\n      return 'Null';\n    }\n\n    if (typeof x === 'undefined') {\n      return 'Undefined';\n    }\n\n    if (typeof x === 'function' || typeof x === 'object') {\n      return 'Object';\n    }\n\n    if (typeof x === 'number') {\n      return 'Number';\n    }\n\n    if (typeof x === 'boolean') {\n      return 'Boolean';\n    }\n\n    if (typeof x === 'string') {\n      return 'String';\n    }\n  },\n  // https://ecma-international.org/ecma-262/6.0/#sec-property-descriptor-specification-type\n  IsPropertyDescriptor: function IsPropertyDescriptor(Desc) {\n    if (this.Type(Desc) !== 'Object') {\n      return false;\n    }\n\n    var allowed = {\n      '[[Configurable]]': true,\n      '[[Enumerable]]': true,\n      '[[Get]]': true,\n      '[[Set]]': true,\n      '[[Value]]': true,\n      '[[Writable]]': true\n    };\n\n    for (var key in Desc) {\n      // eslint-disable-line\n      if (has(Desc, key) && !allowed[key]) {\n        return false;\n      }\n    }\n\n    var isData = has(Desc, '[[Value]]');\n    var IsAccessor = has(Desc, '[[Get]]') || has(Desc, '[[Set]]');\n\n    if (isData && IsAccessor) {\n      throw new $TypeError('Property Descriptors may not be both accessor and data descriptors');\n    }\n\n    return true;\n  },\n  // https://ecma-international.org/ecma-262/5.1/#sec-8.10.1\n  IsAccessorDescriptor: function IsAccessorDescriptor(Desc) {\n    if (typeof Desc === 'undefined') {\n      return false;\n    }\n\n    assertRecord(this, 'Property Descriptor', 'Desc', Desc);\n\n    if (!has(Desc, '[[Get]]') && !has(Desc, '[[Set]]')) {\n      return false;\n    }\n\n    return true;\n  },\n  // https://ecma-international.org/ecma-262/5.1/#sec-8.10.2\n  IsDataDescriptor: function IsDataDescriptor(Desc) {\n    if (typeof Desc === 'undefined') {\n      return false;\n    }\n\n    assertRecord(this, 'Property Descriptor', 'Desc', Desc);\n\n    if (!has(Desc, '[[Value]]') && !has(Desc, '[[Writable]]')) {\n      return false;\n    }\n\n    return true;\n  },\n  // https://ecma-international.org/ecma-262/5.1/#sec-8.10.3\n  IsGenericDescriptor: function IsGenericDescriptor(Desc) {\n    if (typeof Desc === 'undefined') {\n      return false;\n    }\n\n    assertRecord(this, 'Property Descriptor', 'Desc', Desc);\n\n    if (!this.IsAccessorDescriptor(Desc) && !this.IsDataDescriptor(Desc)) {\n      return true;\n    }\n\n    return false;\n  },\n  // https://ecma-international.org/ecma-262/5.1/#sec-8.10.4\n  FromPropertyDescriptor: function FromPropertyDescriptor(Desc) {\n    if (typeof Desc === 'undefined') {\n      return Desc;\n    }\n\n    assertRecord(this, 'Property Descriptor', 'Desc', Desc);\n\n    if (this.IsDataDescriptor(Desc)) {\n      return {\n        value: Desc['[[Value]]'],\n        writable: !!Desc['[[Writable]]'],\n        enumerable: !!Desc['[[Enumerable]]'],\n        configurable: !!Desc['[[Configurable]]']\n      };\n    } else if (this.IsAccessorDescriptor(Desc)) {\n      return {\n        get: Desc['[[Get]]'],\n        set: Desc['[[Set]]'],\n        enumerable: !!Desc['[[Enumerable]]'],\n        configurable: !!Desc['[[Configurable]]']\n      };\n    } else {\n      throw new $TypeError('FromPropertyDescriptor must be called with a fully populated Property Descriptor');\n    }\n  },\n  // https://ecma-international.org/ecma-262/5.1/#sec-8.10.5\n  ToPropertyDescriptor: function ToPropertyDescriptor(Obj) {\n    if (this.Type(Obj) !== 'Object') {\n      throw new $TypeError('ToPropertyDescriptor requires an object');\n    }\n\n    var desc = {};\n\n    if (has(Obj, 'enumerable')) {\n      desc['[[Enumerable]]'] = this.ToBoolean(Obj.enumerable);\n    }\n\n    if (has(Obj, 'configurable')) {\n      desc['[[Configurable]]'] = this.ToBoolean(Obj.configurable);\n    }\n\n    if (has(Obj, 'value')) {\n      desc['[[Value]]'] = Obj.value;\n    }\n\n    if (has(Obj, 'writable')) {\n      desc['[[Writable]]'] = this.ToBoolean(Obj.writable);\n    }\n\n    if (has(Obj, 'get')) {\n      var getter = Obj.get;\n\n      if (typeof getter !== 'undefined' && !this.IsCallable(getter)) {\n        throw new TypeError('getter must be a function');\n      }\n\n      desc['[[Get]]'] = getter;\n    }\n\n    if (has(Obj, 'set')) {\n      var setter = Obj.set;\n\n      if (typeof setter !== 'undefined' && !this.IsCallable(setter)) {\n        throw new $TypeError('setter must be a function');\n      }\n\n      desc['[[Set]]'] = setter;\n    }\n\n    if ((has(desc, '[[Get]]') || has(desc, '[[Set]]')) && (has(desc, '[[Value]]') || has(desc, '[[Writable]]'))) {\n      throw new $TypeError('Invalid property descriptor. Cannot both specify accessors and a value or writable attribute');\n    }\n\n    return desc;\n  }\n};\nmodule.exports = ES5;","'use strict';\n\nvar GetIntrinsic = require('../GetIntrinsic');\n\nvar $TypeError = GetIntrinsic('%TypeError%');\nvar $SyntaxError = GetIntrinsic('%SyntaxError%');\n\nvar has = require('has');\n\nvar predicates = {\n  // https://ecma-international.org/ecma-262/6.0/#sec-property-descriptor-specification-type\n  'Property Descriptor': function isPropertyDescriptor(ES, Desc) {\n    if (ES.Type(Desc) !== 'Object') {\n      return false;\n    }\n\n    var allowed = {\n      '[[Configurable]]': true,\n      '[[Enumerable]]': true,\n      '[[Get]]': true,\n      '[[Set]]': true,\n      '[[Value]]': true,\n      '[[Writable]]': true\n    };\n\n    for (var key in Desc) {\n      // eslint-disable-line\n      if (has(Desc, key) && !allowed[key]) {\n        return false;\n      }\n    }\n\n    var isData = has(Desc, '[[Value]]');\n    var IsAccessor = has(Desc, '[[Get]]') || has(Desc, '[[Set]]');\n\n    if (isData && IsAccessor) {\n      throw new $TypeError('Property Descriptors may not be both accessor and data descriptors');\n    }\n\n    return true;\n  }\n};\n\nmodule.exports = function assertRecord(ES, recordType, argumentName, value) {\n  var predicate = predicates[recordType];\n\n  if (typeof predicate !== 'function') {\n    throw new $SyntaxError('unknown record type: ' + recordType);\n  }\n\n  if (!predicate(ES, value)) {\n    throw new $TypeError(argumentName + ' must be a ' + recordType);\n  }\n\n  console.log(predicate(ES, value), value);\n};","module.exports = Number.isNaN || function isNaN(a) {\n  return a !== a;\n};","var $isNaN = Number.isNaN || function (a) {\n  return a !== a;\n};\n\nmodule.exports = Number.isFinite || function (x) {\n  return typeof x === 'number' && !$isNaN(x) && x !== Infinity && x !== -Infinity;\n};","module.exports = function sign(number) {\n  return number >= 0 ? 1 : -1;\n};","module.exports = function mod(number, modulo) {\n  var remain = number % modulo;\n  return Math.floor(remain >= 0 ? remain : remain + modulo);\n};","'use strict';\n\nvar toStr = Object.prototype.toString;\n\nvar isPrimitive = require('./helpers/isPrimitive');\n\nvar isCallable = require('is-callable'); // http://ecma-international.org/ecma-262/5.1/#sec-8.12.8\n\n\nvar ES5internalSlots = {\n  '[[DefaultValue]]': function DefaultValue(O) {\n    var actualHint;\n\n    if (arguments.length > 1) {\n      actualHint = arguments[1];\n    } else {\n      actualHint = toStr.call(O) === '[object Date]' ? String : Number;\n    }\n\n    if (actualHint === String || actualHint === Number) {\n      var methods = actualHint === String ? ['toString', 'valueOf'] : ['valueOf', 'toString'];\n      var value, i;\n\n      for (i = 0; i < methods.length; ++i) {\n        if (isCallable(O[methods[i]])) {\n          value = O[methods[i]]();\n\n          if (isPrimitive(value)) {\n            return value;\n          }\n        }\n      }\n\n      throw new TypeError('No default value');\n    }\n\n    throw new TypeError('invalid [[DefaultValue]] hint supplied');\n  }\n}; // http://ecma-international.org/ecma-262/5.1/#sec-9.1\n\nmodule.exports = function ToPrimitive(input) {\n  if (isPrimitive(input)) {\n    return input;\n  }\n\n  if (arguments.length > 1) {\n    return ES5internalSlots['[[DefaultValue]]'](input, arguments[1]);\n  }\n\n  return ES5internalSlots['[[DefaultValue]]'](input);\n};","module.exports = function isPrimitive(value) {\n  return value === null || typeof value !== 'function' && typeof value !== 'object';\n};","'use strict';\n\nvar define = require('define-properties');\n\nvar getPolyfill = require('./polyfill');\n\nmodule.exports = function shimStringTrim() {\n  var polyfill = getPolyfill();\n  define(String.prototype, {\n    trim: polyfill\n  }, {\n    trim: function trim() {\n      return String.prototype.trim !== polyfill;\n    }\n  });\n  return polyfill;\n};","'use strict';\n\nvar isCallable = require('is-callable');\n\nvar toStr = Object.prototype.toString;\nvar hasOwnProperty = Object.prototype.hasOwnProperty;\n\nvar forEachArray = function forEachArray(array, iterator, receiver) {\n  for (var i = 0, len = array.length; i < len; i++) {\n    if (hasOwnProperty.call(array, i)) {\n      if (receiver == null) {\n        iterator(array[i], i, array);\n      } else {\n        iterator.call(receiver, array[i], i, array);\n      }\n    }\n  }\n};\n\nvar forEachString = function forEachString(string, iterator, receiver) {\n  for (var i = 0, len = string.length; i < len; i++) {\n    // no such thing as a sparse string.\n    if (receiver == null) {\n      iterator(string.charAt(i), i, string);\n    } else {\n      iterator.call(receiver, string.charAt(i), i, string);\n    }\n  }\n};\n\nvar forEachObject = function forEachObject(object, iterator, receiver) {\n  for (var k in object) {\n    if (hasOwnProperty.call(object, k)) {\n      if (receiver == null) {\n        iterator(object[k], k, object);\n      } else {\n        iterator.call(receiver, object[k], k, object);\n      }\n    }\n  }\n};\n\nvar forEach = function forEach(list, iterator, thisArg) {\n  if (!isCallable(iterator)) {\n    throw new TypeError('iterator must be a function');\n  }\n\n  var receiver;\n\n  if (arguments.length >= 3) {\n    receiver = thisArg;\n  }\n\n  if (toStr.call(list) === '[object Array]') {\n    forEachArray(list, iterator, receiver);\n  } else if (typeof list === 'string') {\n    forEachString(list, iterator, receiver);\n  } else {\n    forEachObject(list, iterator, receiver);\n  }\n};\n\nmodule.exports = forEach;","module.exports = extend;\nvar hasOwnProperty = Object.prototype.hasOwnProperty;\n\nfunction extend() {\n  var target = {};\n\n  for (var i = 0; i < arguments.length; i++) {\n    var source = arguments[i];\n\n    for (var key in source) {\n      if (hasOwnProperty.call(source, key)) {\n        target[key] = source[key];\n      }\n    }\n  }\n\n  return target;\n}","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n// Default exports for Node. Export the extended versions of VTTCue and\n// VTTRegion in Node since we likely want the capability to convert back and\n// forth between JSON. If we don't then it's not that big of a deal since we're\n// off browser.\nvar window = require('global/window');\n\nvar vttjs = module.exports = {\n  WebVTT: require(\"./vtt.js\"),\n  VTTCue: require(\"./vttcue.js\"),\n  VTTRegion: require(\"./vttregion.js\")\n};\nwindow.vttjs = vttjs;\nwindow.WebVTT = vttjs.WebVTT;\nvar cueShim = vttjs.VTTCue;\nvar regionShim = vttjs.VTTRegion;\nvar nativeVTTCue = window.VTTCue;\nvar nativeVTTRegion = window.VTTRegion;\n\nvttjs.shim = function () {\n  window.VTTCue = cueShim;\n  window.VTTRegion = regionShim;\n};\n\nvttjs.restore = function () {\n  window.VTTCue = nativeVTTCue;\n  window.VTTRegion = nativeVTTRegion;\n};\n\nif (!window.VTTCue) {\n  vttjs.shim();\n}","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */\n\n/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */\nvar _objCreate = Object.create || function () {\n  function F() {}\n\n  return function (o) {\n    if (arguments.length !== 1) {\n      throw new Error('Object.create shim only accepts one parameter.');\n    }\n\n    F.prototype = o;\n    return new F();\n  };\n}(); // Creates a new ParserError object from an errorData object. The errorData\n// object should have default code and message properties. The default message\n// property can be overriden by passing in a message parameter.\n// See ParsingError.Errors below for acceptable errors.\n\n\nfunction ParsingError(errorData, message) {\n  this.name = \"ParsingError\";\n  this.code = errorData.code;\n  this.message = message || errorData.message;\n}\n\nParsingError.prototype = _objCreate(Error.prototype);\nParsingError.prototype.constructor = ParsingError; // ParsingError metadata for acceptable ParsingErrors.\n\nParsingError.Errors = {\n  BadSignature: {\n    code: 0,\n    message: \"Malformed WebVTT signature.\"\n  },\n  BadTimeStamp: {\n    code: 1,\n    message: \"Malformed time stamp.\"\n  }\n}; // Try to parse input as a time stamp.\n\nfunction parseTimeStamp(input) {\n  function computeSeconds(h, m, s, f) {\n    return (h | 0) * 3600 + (m | 0) * 60 + (s | 0) + (f | 0) / 1000;\n  }\n\n  var m = input.match(/^(\\d+):(\\d{2})(:\\d{2})?\\.(\\d{3})/);\n\n  if (!m) {\n    return null;\n  }\n\n  if (m[3]) {\n    // Timestamp takes the form of [hours]:[minutes]:[seconds].[milliseconds]\n    return computeSeconds(m[1], m[2], m[3].replace(\":\", \"\"), m[4]);\n  } else if (m[1] > 59) {\n    // Timestamp takes the form of [hours]:[minutes].[milliseconds]\n    // First position is hours as it's over 59.\n    return computeSeconds(m[1], m[2], 0, m[4]);\n  } else {\n    // Timestamp takes the form of [minutes]:[seconds].[milliseconds]\n    return computeSeconds(0, m[1], m[2], m[4]);\n  }\n} // A settings object holds key/value pairs and will ignore anything but the first\n// assignment to a specific key.\n\n\nfunction Settings() {\n  this.values = _objCreate(null);\n}\n\nSettings.prototype = {\n  // Only accept the first assignment to any key.\n  set: function set(k, v) {\n    if (!this.get(k) && v !== \"\") {\n      this.values[k] = v;\n    }\n  },\n  // Return the value for a key, or a default value.\n  // If 'defaultKey' is passed then 'dflt' is assumed to be an object with\n  // a number of possible default values as properties where 'defaultKey' is\n  // the key of the property that will be chosen; otherwise it's assumed to be\n  // a single value.\n  get: function get(k, dflt, defaultKey) {\n    if (defaultKey) {\n      return this.has(k) ? this.values[k] : dflt[defaultKey];\n    }\n\n    return this.has(k) ? this.values[k] : dflt;\n  },\n  // Check whether we have a value for a key.\n  has: function has(k) {\n    return k in this.values;\n  },\n  // Accept a setting if its one of the given alternatives.\n  alt: function alt(k, v, a) {\n    for (var n = 0; n < a.length; ++n) {\n      if (v === a[n]) {\n        this.set(k, v);\n        break;\n      }\n    }\n  },\n  // Accept a setting if its a valid (signed) integer.\n  integer: function integer(k, v) {\n    if (/^-?\\d+$/.test(v)) {\n      // integer\n      this.set(k, parseInt(v, 10));\n    }\n  },\n  // Accept a setting if its a valid percentage.\n  percent: function percent(k, v) {\n    var m;\n\n    if (m = v.match(/^([\\d]{1,3})(\\.[\\d]*)?%$/)) {\n      v = parseFloat(v);\n\n      if (v >= 0 && v <= 100) {\n        this.set(k, v);\n        return true;\n      }\n    }\n\n    return false;\n  }\n}; // Helper function to parse input into groups separated by 'groupDelim', and\n// interprete each group as a key/value pair separated by 'keyValueDelim'.\n\nfunction parseOptions(input, callback, keyValueDelim, groupDelim) {\n  var groups = groupDelim ? input.split(groupDelim) : [input];\n\n  for (var i in groups) {\n    if (typeof groups[i] !== \"string\") {\n      continue;\n    }\n\n    var kv = groups[i].split(keyValueDelim);\n\n    if (kv.length !== 2) {\n      continue;\n    }\n\n    var k = kv[0];\n    var v = kv[1];\n    callback(k, v);\n  }\n}\n\nfunction parseCue(input, cue, regionList) {\n  // Remember the original input if we need to throw an error.\n  var oInput = input; // 4.1 WebVTT timestamp\n\n  function consumeTimeStamp() {\n    var ts = parseTimeStamp(input);\n\n    if (ts === null) {\n      throw new ParsingError(ParsingError.Errors.BadTimeStamp, \"Malformed timestamp: \" + oInput);\n    } // Remove time stamp from input.\n\n\n    input = input.replace(/^[^\\sa-zA-Z-]+/, \"\");\n    return ts;\n  } // 4.4.2 WebVTT cue settings\n\n\n  function consumeCueSettings(input, cue) {\n    var settings = new Settings();\n    parseOptions(input, function (k, v) {\n      switch (k) {\n        case \"region\":\n          // Find the last region we parsed with the same region id.\n          for (var i = regionList.length - 1; i >= 0; i--) {\n            if (regionList[i].id === v) {\n              settings.set(k, regionList[i].region);\n              break;\n            }\n          }\n\n          break;\n\n        case \"vertical\":\n          settings.alt(k, v, [\"rl\", \"lr\"]);\n          break;\n\n        case \"line\":\n          var vals = v.split(\",\"),\n              vals0 = vals[0];\n          settings.integer(k, vals0);\n          settings.percent(k, vals0) ? settings.set(\"snapToLines\", false) : null;\n          settings.alt(k, vals0, [\"auto\"]);\n\n          if (vals.length === 2) {\n            settings.alt(\"lineAlign\", vals[1], [\"start\", \"middle\", \"end\"]);\n          }\n\n          break;\n\n        case \"position\":\n          vals = v.split(\",\");\n          settings.percent(k, vals[0]);\n\n          if (vals.length === 2) {\n            settings.alt(\"positionAlign\", vals[1], [\"start\", \"middle\", \"end\"]);\n          }\n\n          break;\n\n        case \"size\":\n          settings.percent(k, v);\n          break;\n\n        case \"align\":\n          settings.alt(k, v, [\"start\", \"middle\", \"end\", \"left\", \"right\"]);\n          break;\n      }\n    }, /:/, /\\s/); // Apply default values for any missing fields.\n\n    cue.region = settings.get(\"region\", null);\n    cue.vertical = settings.get(\"vertical\", \"\");\n    cue.line = settings.get(\"line\", \"auto\");\n    cue.lineAlign = settings.get(\"lineAlign\", \"start\");\n    cue.snapToLines = settings.get(\"snapToLines\", true);\n    cue.size = settings.get(\"size\", 100);\n    cue.align = settings.get(\"align\", \"middle\");\n    cue.position = settings.get(\"position\", {\n      start: 0,\n      left: 0,\n      middle: 50,\n      end: 100,\n      right: 100\n    }, cue.align);\n    cue.positionAlign = settings.get(\"positionAlign\", {\n      start: \"start\",\n      left: \"start\",\n      middle: \"middle\",\n      end: \"end\",\n      right: \"end\"\n    }, cue.align);\n  }\n\n  function skipWhitespace() {\n    input = input.replace(/^\\s+/, \"\");\n  } // 4.1 WebVTT cue timings.\n\n\n  skipWhitespace();\n  cue.startTime = consumeTimeStamp(); // (1) collect cue start time\n\n  skipWhitespace();\n\n  if (input.substr(0, 3) !== \"-->\") {\n    // (3) next characters must match \"-->\"\n    throw new ParsingError(ParsingError.Errors.BadTimeStamp, \"Malformed time stamp (time stamps must be separated by '-->'): \" + oInput);\n  }\n\n  input = input.substr(3);\n  skipWhitespace();\n  cue.endTime = consumeTimeStamp(); // (5) collect cue end time\n  // 4.1 WebVTT cue settings list.\n\n  skipWhitespace();\n  consumeCueSettings(input, cue);\n}\n\nvar ESCAPE = {\n  \"&amp;\": \"&\",\n  \"&lt;\": \"<\",\n  \"&gt;\": \">\",\n  \"&lrm;\": \"\\u200E\",\n  \"&rlm;\": \"\\u200F\",\n  \"&nbsp;\": \"\\xA0\"\n};\nvar TAG_NAME = {\n  c: \"span\",\n  i: \"i\",\n  b: \"b\",\n  u: \"u\",\n  ruby: \"ruby\",\n  rt: \"rt\",\n  v: \"span\",\n  lang: \"span\"\n};\nvar TAG_ANNOTATION = {\n  v: \"title\",\n  lang: \"lang\"\n};\nvar NEEDS_PARENT = {\n  rt: \"ruby\"\n}; // Parse content into a document fragment.\n\nfunction parseContent(window, input) {\n  function nextToken() {\n    // Check for end-of-string.\n    if (!input) {\n      return null;\n    } // Consume 'n' characters from the input.\n\n\n    function consume(result) {\n      input = input.substr(result.length);\n      return result;\n    }\n\n    var m = input.match(/^([^<]*)(<[^>]*>?)?/); // If there is some text before the next tag, return it, otherwise return\n    // the tag.\n\n    return consume(m[1] ? m[1] : m[2]);\n  } // Unescape a string 's'.\n\n\n  function unescape1(e) {\n    return ESCAPE[e];\n  }\n\n  function unescape(s) {\n    while (m = s.match(/&(amp|lt|gt|lrm|rlm|nbsp);/)) {\n      s = s.replace(m[0], unescape1);\n    }\n\n    return s;\n  }\n\n  function shouldAdd(current, element) {\n    return !NEEDS_PARENT[element.localName] || NEEDS_PARENT[element.localName] === current.localName;\n  } // Create an element for this tag.\n\n\n  function createElement(type, annotation) {\n    var tagName = TAG_NAME[type];\n\n    if (!tagName) {\n      return null;\n    }\n\n    var element = window.document.createElement(tagName);\n    element.localName = tagName;\n    var name = TAG_ANNOTATION[type];\n\n    if (name && annotation) {\n      element[name] = annotation.trim();\n    }\n\n    return element;\n  }\n\n  var rootDiv = window.document.createElement(\"div\"),\n      current = rootDiv,\n      t,\n      tagStack = [];\n\n  while ((t = nextToken()) !== null) {\n    if (t[0] === '<') {\n      if (t[1] === \"/\") {\n        // If the closing tag matches, move back up to the parent node.\n        if (tagStack.length && tagStack[tagStack.length - 1] === t.substr(2).replace(\">\", \"\")) {\n          tagStack.pop();\n          current = current.parentNode;\n        } // Otherwise just ignore the end tag.\n\n\n        continue;\n      }\n\n      var ts = parseTimeStamp(t.substr(1, t.length - 2));\n      var node;\n\n      if (ts) {\n        // Timestamps are lead nodes as well.\n        node = window.document.createProcessingInstruction(\"timestamp\", ts);\n        current.appendChild(node);\n        continue;\n      }\n\n      var m = t.match(/^<([^.\\s/0-9>]+)(\\.[^\\s\\\\>]+)?([^>\\\\]+)?(\\\\?)>?$/); // If we can't parse the tag, skip to the next tag.\n\n      if (!m) {\n        continue;\n      } // Try to construct an element, and ignore the tag if we couldn't.\n\n\n      node = createElement(m[1], m[3]);\n\n      if (!node) {\n        continue;\n      } // Determine if the tag should be added based on the context of where it\n      // is placed in the cuetext.\n\n\n      if (!shouldAdd(current, node)) {\n        continue;\n      } // Set the class list (as a list of classes, separated by space).\n\n\n      if (m[2]) {\n        node.className = m[2].substr(1).replace('.', ' ');\n      } // Append the node to the current node, and enter the scope of the new\n      // node.\n\n\n      tagStack.push(m[1]);\n      current.appendChild(node);\n      current = node;\n      continue;\n    } // Text nodes are leaf nodes.\n\n\n    current.appendChild(window.document.createTextNode(unescape(t)));\n  }\n\n  return rootDiv;\n} // This is a list of all the Unicode characters that have a strong\n// right-to-left category. What this means is that these characters are\n// written right-to-left for sure. It was generated by pulling all the strong\n// right-to-left characters out of the Unicode data table. That table can\n// found at: http://www.unicode.org/Public/UNIDATA/UnicodeData.txt\n\n\nvar strongRTLRanges = [[0x5be, 0x5be], [0x5c0, 0x5c0], [0x5c3, 0x5c3], [0x5c6, 0x5c6], [0x5d0, 0x5ea], [0x5f0, 0x5f4], [0x608, 0x608], [0x60b, 0x60b], [0x60d, 0x60d], [0x61b, 0x61b], [0x61e, 0x64a], [0x66d, 0x66f], [0x671, 0x6d5], [0x6e5, 0x6e6], [0x6ee, 0x6ef], [0x6fa, 0x70d], [0x70f, 0x710], [0x712, 0x72f], [0x74d, 0x7a5], [0x7b1, 0x7b1], [0x7c0, 0x7ea], [0x7f4, 0x7f5], [0x7fa, 0x7fa], [0x800, 0x815], [0x81a, 0x81a], [0x824, 0x824], [0x828, 0x828], [0x830, 0x83e], [0x840, 0x858], [0x85e, 0x85e], [0x8a0, 0x8a0], [0x8a2, 0x8ac], [0x200f, 0x200f], [0xfb1d, 0xfb1d], [0xfb1f, 0xfb28], [0xfb2a, 0xfb36], [0xfb38, 0xfb3c], [0xfb3e, 0xfb3e], [0xfb40, 0xfb41], [0xfb43, 0xfb44], [0xfb46, 0xfbc1], [0xfbd3, 0xfd3d], [0xfd50, 0xfd8f], [0xfd92, 0xfdc7], [0xfdf0, 0xfdfc], [0xfe70, 0xfe74], [0xfe76, 0xfefc], [0x10800, 0x10805], [0x10808, 0x10808], [0x1080a, 0x10835], [0x10837, 0x10838], [0x1083c, 0x1083c], [0x1083f, 0x10855], [0x10857, 0x1085f], [0x10900, 0x1091b], [0x10920, 0x10939], [0x1093f, 0x1093f], [0x10980, 0x109b7], [0x109be, 0x109bf], [0x10a00, 0x10a00], [0x10a10, 0x10a13], [0x10a15, 0x10a17], [0x10a19, 0x10a33], [0x10a40, 0x10a47], [0x10a50, 0x10a58], [0x10a60, 0x10a7f], [0x10b00, 0x10b35], [0x10b40, 0x10b55], [0x10b58, 0x10b72], [0x10b78, 0x10b7f], [0x10c00, 0x10c48], [0x1ee00, 0x1ee03], [0x1ee05, 0x1ee1f], [0x1ee21, 0x1ee22], [0x1ee24, 0x1ee24], [0x1ee27, 0x1ee27], [0x1ee29, 0x1ee32], [0x1ee34, 0x1ee37], [0x1ee39, 0x1ee39], [0x1ee3b, 0x1ee3b], [0x1ee42, 0x1ee42], [0x1ee47, 0x1ee47], [0x1ee49, 0x1ee49], [0x1ee4b, 0x1ee4b], [0x1ee4d, 0x1ee4f], [0x1ee51, 0x1ee52], [0x1ee54, 0x1ee54], [0x1ee57, 0x1ee57], [0x1ee59, 0x1ee59], [0x1ee5b, 0x1ee5b], [0x1ee5d, 0x1ee5d], [0x1ee5f, 0x1ee5f], [0x1ee61, 0x1ee62], [0x1ee64, 0x1ee64], [0x1ee67, 0x1ee6a], [0x1ee6c, 0x1ee72], [0x1ee74, 0x1ee77], [0x1ee79, 0x1ee7c], [0x1ee7e, 0x1ee7e], [0x1ee80, 0x1ee89], [0x1ee8b, 0x1ee9b], [0x1eea1, 0x1eea3], [0x1eea5, 0x1eea9], [0x1eeab, 0x1eebb], [0x10fffd, 0x10fffd]];\n\nfunction isStrongRTLChar(charCode) {\n  for (var i = 0; i < strongRTLRanges.length; i++) {\n    var currentRange = strongRTLRanges[i];\n\n    if (charCode >= currentRange[0] && charCode <= currentRange[1]) {\n      return true;\n    }\n  }\n\n  return false;\n}\n\nfunction determineBidi(cueDiv) {\n  var nodeStack = [],\n      text = \"\",\n      charCode;\n\n  if (!cueDiv || !cueDiv.childNodes) {\n    return \"ltr\";\n  }\n\n  function pushNodes(nodeStack, node) {\n    for (var i = node.childNodes.length - 1; i >= 0; i--) {\n      nodeStack.push(node.childNodes[i]);\n    }\n  }\n\n  function nextTextNode(nodeStack) {\n    if (!nodeStack || !nodeStack.length) {\n      return null;\n    }\n\n    var node = nodeStack.pop(),\n        text = node.textContent || node.innerText;\n\n    if (text) {\n      // TODO: This should match all unicode type B characters (paragraph\n      // separator characters). See issue #115.\n      var m = text.match(/^.*(\\n|\\r)/);\n\n      if (m) {\n        nodeStack.length = 0;\n        return m[0];\n      }\n\n      return text;\n    }\n\n    if (node.tagName === \"ruby\") {\n      return nextTextNode(nodeStack);\n    }\n\n    if (node.childNodes) {\n      pushNodes(nodeStack, node);\n      return nextTextNode(nodeStack);\n    }\n  }\n\n  pushNodes(nodeStack, cueDiv);\n\n  while (text = nextTextNode(nodeStack)) {\n    for (var i = 0; i < text.length; i++) {\n      charCode = text.charCodeAt(i);\n\n      if (isStrongRTLChar(charCode)) {\n        return \"rtl\";\n      }\n    }\n  }\n\n  return \"ltr\";\n}\n\nfunction computeLinePos(cue) {\n  if (typeof cue.line === \"number\" && (cue.snapToLines || cue.line >= 0 && cue.line <= 100)) {\n    return cue.line;\n  }\n\n  if (!cue.track || !cue.track.textTrackList || !cue.track.textTrackList.mediaElement) {\n    return -1;\n  }\n\n  var track = cue.track,\n      trackList = track.textTrackList,\n      count = 0;\n\n  for (var i = 0; i < trackList.length && trackList[i] !== track; i++) {\n    if (trackList[i].mode === \"showing\") {\n      count++;\n    }\n  }\n\n  return ++count * -1;\n}\n\nfunction StyleBox() {} // Apply styles to a div. If there is no div passed then it defaults to the\n// div on 'this'.\n\n\nStyleBox.prototype.applyStyles = function (styles, div) {\n  div = div || this.div;\n\n  for (var prop in styles) {\n    if (styles.hasOwnProperty(prop)) {\n      div.style[prop] = styles[prop];\n    }\n  }\n};\n\nStyleBox.prototype.formatStyle = function (val, unit) {\n  return val === 0 ? 0 : val + unit;\n}; // Constructs the computed display state of the cue (a div). Places the div\n// into the overlay which should be a block level element (usually a div).\n\n\nfunction CueStyleBox(window, cue, styleOptions) {\n  StyleBox.call(this);\n  this.cue = cue; // Parse our cue's text into a DOM tree rooted at 'cueDiv'. This div will\n  // have inline positioning and will function as the cue background box.\n\n  this.cueDiv = parseContent(window, cue.text);\n  var styles = {\n    color: \"rgba(255, 255, 255, 1)\",\n    backgroundColor: \"rgba(0, 0, 0, 0.8)\",\n    position: \"relative\",\n    left: 0,\n    right: 0,\n    top: 0,\n    bottom: 0,\n    display: \"inline\",\n    writingMode: cue.vertical === \"\" ? \"horizontal-tb\" : cue.vertical === \"lr\" ? \"vertical-lr\" : \"vertical-rl\",\n    unicodeBidi: \"plaintext\"\n  };\n  this.applyStyles(styles, this.cueDiv); // Create an absolutely positioned div that will be used to position the cue\n  // div. Note, all WebVTT cue-setting alignments are equivalent to the CSS\n  // mirrors of them except \"middle\" which is \"center\" in CSS.\n\n  this.div = window.document.createElement(\"div\");\n  styles = {\n    direction: determineBidi(this.cueDiv),\n    writingMode: cue.vertical === \"\" ? \"horizontal-tb\" : cue.vertical === \"lr\" ? \"vertical-lr\" : \"vertical-rl\",\n    unicodeBidi: \"plaintext\",\n    textAlign: cue.align === \"middle\" ? \"center\" : cue.align,\n    font: styleOptions.font,\n    whiteSpace: \"pre-line\",\n    position: \"absolute\"\n  };\n  this.applyStyles(styles);\n  this.div.appendChild(this.cueDiv); // Calculate the distance from the reference edge of the viewport to the text\n  // position of the cue box. The reference edge will be resolved later when\n  // the box orientation styles are applied.\n\n  var textPos = 0;\n\n  switch (cue.positionAlign) {\n    case \"start\":\n      textPos = cue.position;\n      break;\n\n    case \"middle\":\n      textPos = cue.position - cue.size / 2;\n      break;\n\n    case \"end\":\n      textPos = cue.position - cue.size;\n      break;\n  } // Horizontal box orientation; textPos is the distance from the left edge of the\n  // area to the left edge of the box and cue.size is the distance extending to\n  // the right from there.\n\n\n  if (cue.vertical === \"\") {\n    this.applyStyles({\n      left: this.formatStyle(textPos, \"%\"),\n      width: this.formatStyle(cue.size, \"%\")\n    }); // Vertical box orientation; textPos is the distance from the top edge of the\n    // area to the top edge of the box and cue.size is the height extending\n    // downwards from there.\n  } else {\n    this.applyStyles({\n      top: this.formatStyle(textPos, \"%\"),\n      height: this.formatStyle(cue.size, \"%\")\n    });\n  }\n\n  this.move = function (box) {\n    this.applyStyles({\n      top: this.formatStyle(box.top, \"px\"),\n      bottom: this.formatStyle(box.bottom, \"px\"),\n      left: this.formatStyle(box.left, \"px\"),\n      right: this.formatStyle(box.right, \"px\"),\n      height: this.formatStyle(box.height, \"px\"),\n      width: this.formatStyle(box.width, \"px\")\n    });\n  };\n}\n\nCueStyleBox.prototype = _objCreate(StyleBox.prototype);\nCueStyleBox.prototype.constructor = CueStyleBox; // Represents the co-ordinates of an Element in a way that we can easily\n// compute things with such as if it overlaps or intersects with another Element.\n// Can initialize it with either a StyleBox or another BoxPosition.\n\nfunction BoxPosition(obj) {\n  // Either a BoxPosition was passed in and we need to copy it, or a StyleBox\n  // was passed in and we need to copy the results of 'getBoundingClientRect'\n  // as the object returned is readonly. All co-ordinate values are in reference\n  // to the viewport origin (top left).\n  var lh, height, width, top;\n\n  if (obj.div) {\n    height = obj.div.offsetHeight;\n    width = obj.div.offsetWidth;\n    top = obj.div.offsetTop;\n    var rects = (rects = obj.div.childNodes) && (rects = rects[0]) && rects.getClientRects && rects.getClientRects();\n    obj = obj.div.getBoundingClientRect(); // In certain cases the outter div will be slightly larger then the sum of\n    // the inner div's lines. This could be due to bold text, etc, on some platforms.\n    // In this case we should get the average line height and use that. This will\n    // result in the desired behaviour.\n\n    lh = rects ? Math.max(rects[0] && rects[0].height || 0, obj.height / rects.length) : 0;\n  }\n\n  this.left = obj.left;\n  this.right = obj.right;\n  this.top = obj.top || top;\n  this.height = obj.height || height;\n  this.bottom = obj.bottom || top + (obj.height || height);\n  this.width = obj.width || width;\n  this.lineHeight = lh !== undefined ? lh : obj.lineHeight;\n} // Move the box along a particular axis. Optionally pass in an amount to move\n// the box. If no amount is passed then the default is the line height of the\n// box.\n\n\nBoxPosition.prototype.move = function (axis, toMove) {\n  toMove = toMove !== undefined ? toMove : this.lineHeight;\n\n  switch (axis) {\n    case \"+x\":\n      this.left += toMove;\n      this.right += toMove;\n      break;\n\n    case \"-x\":\n      this.left -= toMove;\n      this.right -= toMove;\n      break;\n\n    case \"+y\":\n      this.top += toMove;\n      this.bottom += toMove;\n      break;\n\n    case \"-y\":\n      this.top -= toMove;\n      this.bottom -= toMove;\n      break;\n  }\n}; // Check if this box overlaps another box, b2.\n\n\nBoxPosition.prototype.overlaps = function (b2) {\n  return this.left < b2.right && this.right > b2.left && this.top < b2.bottom && this.bottom > b2.top;\n}; // Check if this box overlaps any other boxes in boxes.\n\n\nBoxPosition.prototype.overlapsAny = function (boxes) {\n  for (var i = 0; i < boxes.length; i++) {\n    if (this.overlaps(boxes[i])) {\n      return true;\n    }\n  }\n\n  return false;\n}; // Check if this box is within another box.\n\n\nBoxPosition.prototype.within = function (container) {\n  return this.top >= container.top && this.bottom <= container.bottom && this.left >= container.left && this.right <= container.right;\n}; // Check if this box is entirely within the container or it is overlapping\n// on the edge opposite of the axis direction passed. For example, if \"+x\" is\n// passed and the box is overlapping on the left edge of the container, then\n// return true.\n\n\nBoxPosition.prototype.overlapsOppositeAxis = function (container, axis) {\n  switch (axis) {\n    case \"+x\":\n      return this.left < container.left;\n\n    case \"-x\":\n      return this.right > container.right;\n\n    case \"+y\":\n      return this.top < container.top;\n\n    case \"-y\":\n      return this.bottom > container.bottom;\n  }\n}; // Find the percentage of the area that this box is overlapping with another\n// box.\n\n\nBoxPosition.prototype.intersectPercentage = function (b2) {\n  var x = Math.max(0, Math.min(this.right, b2.right) - Math.max(this.left, b2.left)),\n      y = Math.max(0, Math.min(this.bottom, b2.bottom) - Math.max(this.top, b2.top)),\n      intersectArea = x * y;\n  return intersectArea / (this.height * this.width);\n}; // Convert the positions from this box to CSS compatible positions using\n// the reference container's positions. This has to be done because this\n// box's positions are in reference to the viewport origin, whereas, CSS\n// values are in referecne to their respective edges.\n\n\nBoxPosition.prototype.toCSSCompatValues = function (reference) {\n  return {\n    top: this.top - reference.top,\n    bottom: reference.bottom - this.bottom,\n    left: this.left - reference.left,\n    right: reference.right - this.right,\n    height: this.height,\n    width: this.width\n  };\n}; // Get an object that represents the box's position without anything extra.\n// Can pass a StyleBox, HTMLElement, or another BoxPositon.\n\n\nBoxPosition.getSimpleBoxPosition = function (obj) {\n  var height = obj.div ? obj.div.offsetHeight : obj.tagName ? obj.offsetHeight : 0;\n  var width = obj.div ? obj.div.offsetWidth : obj.tagName ? obj.offsetWidth : 0;\n  var top = obj.div ? obj.div.offsetTop : obj.tagName ? obj.offsetTop : 0;\n  obj = obj.div ? obj.div.getBoundingClientRect() : obj.tagName ? obj.getBoundingClientRect() : obj;\n  var ret = {\n    left: obj.left,\n    right: obj.right,\n    top: obj.top || top,\n    height: obj.height || height,\n    bottom: obj.bottom || top + (obj.height || height),\n    width: obj.width || width\n  };\n  return ret;\n}; // Move a StyleBox to its specified, or next best, position. The containerBox\n// is the box that contains the StyleBox, such as a div. boxPositions are\n// a list of other boxes that the styleBox can't overlap with.\n\n\nfunction moveBoxToLinePosition(window, styleBox, containerBox, boxPositions) {\n  // Find the best position for a cue box, b, on the video. The axis parameter\n  // is a list of axis, the order of which, it will move the box along. For example:\n  // Passing [\"+x\", \"-x\"] will move the box first along the x axis in the positive\n  // direction. If it doesn't find a good position for it there it will then move\n  // it along the x axis in the negative direction.\n  function findBestPosition(b, axis) {\n    var bestPosition,\n        specifiedPosition = new BoxPosition(b),\n        percentage = 1; // Highest possible so the first thing we get is better.\n\n    for (var i = 0; i < axis.length; i++) {\n      while (b.overlapsOppositeAxis(containerBox, axis[i]) || b.within(containerBox) && b.overlapsAny(boxPositions)) {\n        b.move(axis[i]);\n      } // We found a spot where we aren't overlapping anything. This is our\n      // best position.\n\n\n      if (b.within(containerBox)) {\n        return b;\n      }\n\n      var p = b.intersectPercentage(containerBox); // If we're outside the container box less then we were on our last try\n      // then remember this position as the best position.\n\n      if (percentage > p) {\n        bestPosition = new BoxPosition(b);\n        percentage = p;\n      } // Reset the box position to the specified position.\n\n\n      b = new BoxPosition(specifiedPosition);\n    }\n\n    return bestPosition || specifiedPosition;\n  }\n\n  var boxPosition = new BoxPosition(styleBox),\n      cue = styleBox.cue,\n      linePos = computeLinePos(cue),\n      axis = []; // If we have a line number to align the cue to.\n\n  if (cue.snapToLines) {\n    var size;\n\n    switch (cue.vertical) {\n      case \"\":\n        axis = [\"+y\", \"-y\"];\n        size = \"height\";\n        break;\n\n      case \"rl\":\n        axis = [\"+x\", \"-x\"];\n        size = \"width\";\n        break;\n\n      case \"lr\":\n        axis = [\"-x\", \"+x\"];\n        size = \"width\";\n        break;\n    }\n\n    var step = boxPosition.lineHeight,\n        position = step * Math.round(linePos),\n        maxPosition = containerBox[size] + step,\n        initialAxis = axis[0]; // If the specified intial position is greater then the max position then\n    // clamp the box to the amount of steps it would take for the box to\n    // reach the max position.\n\n    if (Math.abs(position) > maxPosition) {\n      position = position < 0 ? -1 : 1;\n      position *= Math.ceil(maxPosition / step) * step;\n    } // If computed line position returns negative then line numbers are\n    // relative to the bottom of the video instead of the top. Therefore, we\n    // need to increase our initial position by the length or width of the\n    // video, depending on the writing direction, and reverse our axis directions.\n\n\n    if (linePos < 0) {\n      position += cue.vertical === \"\" ? containerBox.height : containerBox.width;\n      axis = axis.reverse();\n    } // Move the box to the specified position. This may not be its best\n    // position.\n\n\n    boxPosition.move(initialAxis, position);\n  } else {\n    // If we have a percentage line value for the cue.\n    var calculatedPercentage = boxPosition.lineHeight / containerBox.height * 100;\n\n    switch (cue.lineAlign) {\n      case \"middle\":\n        linePos -= calculatedPercentage / 2;\n        break;\n\n      case \"end\":\n        linePos -= calculatedPercentage;\n        break;\n    } // Apply initial line position to the cue box.\n\n\n    switch (cue.vertical) {\n      case \"\":\n        styleBox.applyStyles({\n          top: styleBox.formatStyle(linePos, \"%\")\n        });\n        break;\n\n      case \"rl\":\n        styleBox.applyStyles({\n          left: styleBox.formatStyle(linePos, \"%\")\n        });\n        break;\n\n      case \"lr\":\n        styleBox.applyStyles({\n          right: styleBox.formatStyle(linePos, \"%\")\n        });\n        break;\n    }\n\n    axis = [\"+y\", \"-x\", \"+x\", \"-y\"]; // Get the box position again after we've applied the specified positioning\n    // to it.\n\n    boxPosition = new BoxPosition(styleBox);\n  }\n\n  var bestPosition = findBestPosition(boxPosition, axis);\n  styleBox.move(bestPosition.toCSSCompatValues(containerBox));\n}\n\nfunction WebVTT() {} // Nothing\n// Helper to allow strings to be decoded instead of the default binary utf8 data.\n\n\nWebVTT.StringDecoder = function () {\n  return {\n    decode: function decode(data) {\n      if (!data) {\n        return \"\";\n      }\n\n      if (typeof data !== \"string\") {\n        throw new Error(\"Error - expected string data.\");\n      }\n\n      return decodeURIComponent(encodeURIComponent(data));\n    }\n  };\n};\n\nWebVTT.convertCueToDOMTree = function (window, cuetext) {\n  if (!window || !cuetext) {\n    return null;\n  }\n\n  return parseContent(window, cuetext);\n};\n\nvar FONT_SIZE_PERCENT = 0.05;\nvar FONT_STYLE = \"sans-serif\";\nvar CUE_BACKGROUND_PADDING = \"1.5%\"; // Runs the processing model over the cues and regions passed to it.\n// @param overlay A block level element (usually a div) that the computed cues\n//                and regions will be placed into.\n\nWebVTT.processCues = function (window, cues, overlay) {\n  if (!window || !cues || !overlay) {\n    return null;\n  } // Remove all previous children.\n\n\n  while (overlay.firstChild) {\n    overlay.removeChild(overlay.firstChild);\n  }\n\n  var paddedOverlay = window.document.createElement(\"div\");\n  paddedOverlay.style.position = \"absolute\";\n  paddedOverlay.style.left = \"0\";\n  paddedOverlay.style.right = \"0\";\n  paddedOverlay.style.top = \"0\";\n  paddedOverlay.style.bottom = \"0\";\n  paddedOverlay.style.margin = CUE_BACKGROUND_PADDING;\n  overlay.appendChild(paddedOverlay); // Determine if we need to compute the display states of the cues. This could\n  // be the case if a cue's state has been changed since the last computation or\n  // if it has not been computed yet.\n\n  function shouldCompute(cues) {\n    for (var i = 0; i < cues.length; i++) {\n      if (cues[i].hasBeenReset || !cues[i].displayState) {\n        return true;\n      }\n    }\n\n    return false;\n  } // We don't need to recompute the cues' display states. Just reuse them.\n\n\n  if (!shouldCompute(cues)) {\n    for (var i = 0; i < cues.length; i++) {\n      paddedOverlay.appendChild(cues[i].displayState);\n    }\n\n    return;\n  }\n\n  var boxPositions = [],\n      containerBox = BoxPosition.getSimpleBoxPosition(paddedOverlay),\n      fontSize = Math.round(containerBox.height * FONT_SIZE_PERCENT * 100) / 100;\n  var styleOptions = {\n    font: fontSize + \"px \" + FONT_STYLE\n  };\n\n  (function () {\n    var styleBox, cue;\n\n    for (var i = 0; i < cues.length; i++) {\n      cue = cues[i]; // Compute the intial position and styles of the cue div.\n\n      styleBox = new CueStyleBox(window, cue, styleOptions);\n      paddedOverlay.appendChild(styleBox.div); // Move the cue div to it's correct line position.\n\n      moveBoxToLinePosition(window, styleBox, containerBox, boxPositions); // Remember the computed div so that we don't have to recompute it later\n      // if we don't have too.\n\n      cue.displayState = styleBox.div;\n      boxPositions.push(BoxPosition.getSimpleBoxPosition(styleBox));\n    }\n  })();\n};\n\nWebVTT.Parser = function (window, vttjs, decoder) {\n  if (!decoder) {\n    decoder = vttjs;\n    vttjs = {};\n  }\n\n  if (!vttjs) {\n    vttjs = {};\n  }\n\n  this.window = window;\n  this.vttjs = vttjs;\n  this.state = \"INITIAL\";\n  this.buffer = \"\";\n  this.decoder = decoder || new TextDecoder(\"utf8\");\n  this.regionList = [];\n};\n\nWebVTT.Parser.prototype = {\n  // If the error is a ParsingError then report it to the consumer if\n  // possible. If it's not a ParsingError then throw it like normal.\n  reportOrThrowError: function reportOrThrowError(e) {\n    if (e instanceof ParsingError) {\n      this.onparsingerror && this.onparsingerror(e);\n    } else {\n      throw e;\n    }\n  },\n  parse: function parse(data) {\n    var self = this; // If there is no data then we won't decode it, but will just try to parse\n    // whatever is in buffer already. This may occur in circumstances, for\n    // example when flush() is called.\n\n    if (data) {\n      // Try to decode the data that we received.\n      self.buffer += self.decoder.decode(data, {\n        stream: true\n      });\n    }\n\n    function collectNextLine() {\n      var buffer = self.buffer;\n      var pos = 0;\n\n      while (pos < buffer.length && buffer[pos] !== '\\r' && buffer[pos] !== '\\n') {\n        ++pos;\n      }\n\n      var line = buffer.substr(0, pos); // Advance the buffer early in case we fail below.\n\n      if (buffer[pos] === '\\r') {\n        ++pos;\n      }\n\n      if (buffer[pos] === '\\n') {\n        ++pos;\n      }\n\n      self.buffer = buffer.substr(pos);\n      return line;\n    } // 3.4 WebVTT region and WebVTT region settings syntax\n\n\n    function parseRegion(input) {\n      var settings = new Settings();\n      parseOptions(input, function (k, v) {\n        switch (k) {\n          case \"id\":\n            settings.set(k, v);\n            break;\n\n          case \"width\":\n            settings.percent(k, v);\n            break;\n\n          case \"lines\":\n            settings.integer(k, v);\n            break;\n\n          case \"regionanchor\":\n          case \"viewportanchor\":\n            var xy = v.split(',');\n\n            if (xy.length !== 2) {\n              break;\n            } // We have to make sure both x and y parse, so use a temporary\n            // settings object here.\n\n\n            var anchor = new Settings();\n            anchor.percent(\"x\", xy[0]);\n            anchor.percent(\"y\", xy[1]);\n\n            if (!anchor.has(\"x\") || !anchor.has(\"y\")) {\n              break;\n            }\n\n            settings.set(k + \"X\", anchor.get(\"x\"));\n            settings.set(k + \"Y\", anchor.get(\"y\"));\n            break;\n\n          case \"scroll\":\n            settings.alt(k, v, [\"up\"]);\n            break;\n        }\n      }, /=/, /\\s/); // Create the region, using default values for any values that were not\n      // specified.\n\n      if (settings.has(\"id\")) {\n        var region = new (self.vttjs.VTTRegion || self.window.VTTRegion)();\n        region.width = settings.get(\"width\", 100);\n        region.lines = settings.get(\"lines\", 3);\n        region.regionAnchorX = settings.get(\"regionanchorX\", 0);\n        region.regionAnchorY = settings.get(\"regionanchorY\", 100);\n        region.viewportAnchorX = settings.get(\"viewportanchorX\", 0);\n        region.viewportAnchorY = settings.get(\"viewportanchorY\", 100);\n        region.scroll = settings.get(\"scroll\", \"\"); // Register the region.\n\n        self.onregion && self.onregion(region); // Remember the VTTRegion for later in case we parse any VTTCues that\n        // reference it.\n\n        self.regionList.push({\n          id: settings.get(\"id\"),\n          region: region\n        });\n      }\n    } // draft-pantos-http-live-streaming-20\n    // https://tools.ietf.org/html/draft-pantos-http-live-streaming-20#section-3.5\n    // 3.5 WebVTT\n\n\n    function parseTimestampMap(input) {\n      var settings = new Settings();\n      parseOptions(input, function (k, v) {\n        switch (k) {\n          case \"MPEGT\":\n            settings.integer(k + 'S', v);\n            break;\n\n          case \"LOCA\":\n            settings.set(k + 'L', parseTimeStamp(v));\n            break;\n        }\n      }, /[^\\d]:/, /,/);\n      self.ontimestampmap && self.ontimestampmap({\n        \"MPEGTS\": settings.get(\"MPEGTS\"),\n        \"LOCAL\": settings.get(\"LOCAL\")\n      });\n    } // 3.2 WebVTT metadata header syntax\n\n\n    function parseHeader(input) {\n      if (input.match(/X-TIMESTAMP-MAP/)) {\n        // This line contains HLS X-TIMESTAMP-MAP metadata\n        parseOptions(input, function (k, v) {\n          switch (k) {\n            case \"X-TIMESTAMP-MAP\":\n              parseTimestampMap(v);\n              break;\n          }\n        }, /=/);\n      } else {\n        parseOptions(input, function (k, v) {\n          switch (k) {\n            case \"Region\":\n              // 3.3 WebVTT region metadata header syntax\n              parseRegion(v);\n              break;\n          }\n        }, /:/);\n      }\n    } // 5.1 WebVTT file parsing.\n\n\n    try {\n      var line;\n\n      if (self.state === \"INITIAL\") {\n        // We can't start parsing until we have the first line.\n        if (!/\\r\\n|\\n/.test(self.buffer)) {\n          return this;\n        }\n\n        line = collectNextLine();\n        var m = line.match(/^WEBVTT([ \\t].*)?$/);\n\n        if (!m || !m[0]) {\n          throw new ParsingError(ParsingError.Errors.BadSignature);\n        }\n\n        self.state = \"HEADER\";\n      }\n\n      var alreadyCollectedLine = false;\n\n      while (self.buffer) {\n        // We can't parse a line until we have the full line.\n        if (!/\\r\\n|\\n/.test(self.buffer)) {\n          return this;\n        }\n\n        if (!alreadyCollectedLine) {\n          line = collectNextLine();\n        } else {\n          alreadyCollectedLine = false;\n        }\n\n        switch (self.state) {\n          case \"HEADER\":\n            // 13-18 - Allow a header (metadata) under the WEBVTT line.\n            if (/:/.test(line)) {\n              parseHeader(line);\n            } else if (!line) {\n              // An empty line terminates the header and starts the body (cues).\n              self.state = \"ID\";\n            }\n\n            continue;\n\n          case \"NOTE\":\n            // Ignore NOTE blocks.\n            if (!line) {\n              self.state = \"ID\";\n            }\n\n            continue;\n\n          case \"ID\":\n            // Check for the start of NOTE blocks.\n            if (/^NOTE($|[ \\t])/.test(line)) {\n              self.state = \"NOTE\";\n              break;\n            } // 19-29 - Allow any number of line terminators, then initialize new cue values.\n\n\n            if (!line) {\n              continue;\n            }\n\n            self.cue = new (self.vttjs.VTTCue || self.window.VTTCue)(0, 0, \"\");\n            self.state = \"CUE\"; // 30-39 - Check if self line contains an optional identifier or timing data.\n\n            if (line.indexOf(\"-->\") === -1) {\n              self.cue.id = line;\n              continue;\n            }\n\n          // Process line as start of a cue.\n\n          /*falls through*/\n\n          case \"CUE\":\n            // 40 - Collect cue timings and settings.\n            try {\n              parseCue(line, self.cue, self.regionList);\n            } catch (e) {\n              self.reportOrThrowError(e); // In case of an error ignore rest of the cue.\n\n              self.cue = null;\n              self.state = \"BADCUE\";\n              continue;\n            }\n\n            self.state = \"CUETEXT\";\n            continue;\n\n          case \"CUETEXT\":\n            var hasSubstring = line.indexOf(\"-->\") !== -1; // 34 - If we have an empty line then report the cue.\n            // 35 - If we have the special substring '-->' then report the cue,\n            // but do not collect the line as we need to process the current\n            // one as a new cue.\n\n            if (!line || hasSubstring && (alreadyCollectedLine = true)) {\n              // We are done parsing self cue.\n              self.oncue && self.oncue(self.cue);\n              self.cue = null;\n              self.state = \"ID\";\n              continue;\n            }\n\n            if (self.cue.text) {\n              self.cue.text += \"\\n\";\n            }\n\n            self.cue.text += line;\n            continue;\n\n          case \"BADCUE\":\n            // BADCUE\n            // 54-62 - Collect and discard the remaining cue.\n            if (!line) {\n              self.state = \"ID\";\n            }\n\n            continue;\n        }\n      }\n    } catch (e) {\n      self.reportOrThrowError(e); // If we are currently parsing a cue, report what we have.\n\n      if (self.state === \"CUETEXT\" && self.cue && self.oncue) {\n        self.oncue(self.cue);\n      }\n\n      self.cue = null; // Enter BADWEBVTT state if header was not parsed correctly otherwise\n      // another exception occurred so enter BADCUE state.\n\n      self.state = self.state === \"INITIAL\" ? \"BADWEBVTT\" : \"BADCUE\";\n    }\n\n    return this;\n  },\n  flush: function flush() {\n    var self = this;\n\n    try {\n      // Finish decoding the stream.\n      self.buffer += self.decoder.decode(); // Synthesize the end of the current cue or region.\n\n      if (self.cue || self.state === \"HEADER\") {\n        self.buffer += \"\\n\\n\";\n        self.parse();\n      } // If we've flushed, parsed, and we're still on the INITIAL state then\n      // that means we don't have enough of the stream to parse the first\n      // line.\n\n\n      if (self.state === \"INITIAL\") {\n        throw new ParsingError(ParsingError.Errors.BadSignature);\n      }\n    } catch (e) {\n      self.reportOrThrowError(e);\n    }\n\n    self.onflush && self.onflush();\n    return this;\n  }\n};\nmodule.exports = WebVTT;","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\nvar autoKeyword = \"auto\";\nvar directionSetting = {\n  \"\": 1,\n  \"lr\": 1,\n  \"rl\": 1\n};\nvar alignSetting = {\n  \"start\": 1,\n  \"middle\": 1,\n  \"end\": 1,\n  \"left\": 1,\n  \"right\": 1\n};\n\nfunction findDirectionSetting(value) {\n  if (typeof value !== \"string\") {\n    return false;\n  }\n\n  var dir = directionSetting[value.toLowerCase()];\n  return dir ? value.toLowerCase() : false;\n}\n\nfunction findAlignSetting(value) {\n  if (typeof value !== \"string\") {\n    return false;\n  }\n\n  var align = alignSetting[value.toLowerCase()];\n  return align ? value.toLowerCase() : false;\n}\n\nfunction VTTCue(startTime, endTime, text) {\n  /**\n   * Shim implementation specific properties. These properties are not in\n   * the spec.\n   */\n  // Lets us know when the VTTCue's data has changed in such a way that we need\n  // to recompute its display state. This lets us compute its display state\n  // lazily.\n  this.hasBeenReset = false;\n  /**\n   * VTTCue and TextTrackCue properties\n   * http://dev.w3.org/html5/webvtt/#vttcue-interface\n   */\n\n  var _id = \"\";\n  var _pauseOnExit = false;\n  var _startTime = startTime;\n  var _endTime = endTime;\n  var _text = text;\n  var _region = null;\n  var _vertical = \"\";\n  var _snapToLines = true;\n  var _line = \"auto\";\n  var _lineAlign = \"start\";\n  var _position = 50;\n  var _positionAlign = \"middle\";\n  var _size = 50;\n  var _align = \"middle\";\n  Object.defineProperties(this, {\n    \"id\": {\n      enumerable: true,\n      get: function get() {\n        return _id;\n      },\n      set: function set(value) {\n        _id = \"\" + value;\n      }\n    },\n    \"pauseOnExit\": {\n      enumerable: true,\n      get: function get() {\n        return _pauseOnExit;\n      },\n      set: function set(value) {\n        _pauseOnExit = !!value;\n      }\n    },\n    \"startTime\": {\n      enumerable: true,\n      get: function get() {\n        return _startTime;\n      },\n      set: function set(value) {\n        if (typeof value !== \"number\") {\n          throw new TypeError(\"Start time must be set to a number.\");\n        }\n\n        _startTime = value;\n        this.hasBeenReset = true;\n      }\n    },\n    \"endTime\": {\n      enumerable: true,\n      get: function get() {\n        return _endTime;\n      },\n      set: function set(value) {\n        if (typeof value !== \"number\") {\n          throw new TypeError(\"End time must be set to a number.\");\n        }\n\n        _endTime = value;\n        this.hasBeenReset = true;\n      }\n    },\n    \"text\": {\n      enumerable: true,\n      get: function get() {\n        return _text;\n      },\n      set: function set(value) {\n        _text = \"\" + value;\n        this.hasBeenReset = true;\n      }\n    },\n    \"region\": {\n      enumerable: true,\n      get: function get() {\n        return _region;\n      },\n      set: function set(value) {\n        _region = value;\n        this.hasBeenReset = true;\n      }\n    },\n    \"vertical\": {\n      enumerable: true,\n      get: function get() {\n        return _vertical;\n      },\n      set: function set(value) {\n        var setting = findDirectionSetting(value); // Have to check for false because the setting an be an empty string.\n\n        if (setting === false) {\n          throw new SyntaxError(\"An invalid or illegal string was specified.\");\n        }\n\n        _vertical = setting;\n        this.hasBeenReset = true;\n      }\n    },\n    \"snapToLines\": {\n      enumerable: true,\n      get: function get() {\n        return _snapToLines;\n      },\n      set: function set(value) {\n        _snapToLines = !!value;\n        this.hasBeenReset = true;\n      }\n    },\n    \"line\": {\n      enumerable: true,\n      get: function get() {\n        return _line;\n      },\n      set: function set(value) {\n        if (typeof value !== \"number\" && value !== autoKeyword) {\n          throw new SyntaxError(\"An invalid number or illegal string was specified.\");\n        }\n\n        _line = value;\n        this.hasBeenReset = true;\n      }\n    },\n    \"lineAlign\": {\n      enumerable: true,\n      get: function get() {\n        return _lineAlign;\n      },\n      set: function set(value) {\n        var setting = findAlignSetting(value);\n\n        if (!setting) {\n          throw new SyntaxError(\"An invalid or illegal string was specified.\");\n        }\n\n        _lineAlign = setting;\n        this.hasBeenReset = true;\n      }\n    },\n    \"position\": {\n      enumerable: true,\n      get: function get() {\n        return _position;\n      },\n      set: function set(value) {\n        if (value < 0 || value > 100) {\n          throw new Error(\"Position must be between 0 and 100.\");\n        }\n\n        _position = value;\n        this.hasBeenReset = true;\n      }\n    },\n    \"positionAlign\": {\n      enumerable: true,\n      get: function get() {\n        return _positionAlign;\n      },\n      set: function set(value) {\n        var setting = findAlignSetting(value);\n\n        if (!setting) {\n          throw new SyntaxError(\"An invalid or illegal string was specified.\");\n        }\n\n        _positionAlign = setting;\n        this.hasBeenReset = true;\n      }\n    },\n    \"size\": {\n      enumerable: true,\n      get: function get() {\n        return _size;\n      },\n      set: function set(value) {\n        if (value < 0 || value > 100) {\n          throw new Error(\"Size must be between 0 and 100.\");\n        }\n\n        _size = value;\n        this.hasBeenReset = true;\n      }\n    },\n    \"align\": {\n      enumerable: true,\n      get: function get() {\n        return _align;\n      },\n      set: function set(value) {\n        var setting = findAlignSetting(value);\n\n        if (!setting) {\n          throw new SyntaxError(\"An invalid or illegal string was specified.\");\n        }\n\n        _align = setting;\n        this.hasBeenReset = true;\n      }\n    }\n  });\n  /**\n   * Other <track> spec defined properties\n   */\n  // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#text-track-cue-display-state\n\n  this.displayState = undefined;\n}\n/**\n * VTTCue methods\n */\n\n\nVTTCue.prototype.getCueAsHTML = function () {\n  // Assume WebVTT.convertCueToDOMTree is on the global.\n  return WebVTT.convertCueToDOMTree(window, this.text);\n};\n\nmodule.exports = VTTCue;","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\nvar scrollSetting = {\n  \"\": true,\n  \"up\": true\n};\n\nfunction findScrollSetting(value) {\n  if (typeof value !== \"string\") {\n    return false;\n  }\n\n  var scroll = scrollSetting[value.toLowerCase()];\n  return scroll ? value.toLowerCase() : false;\n}\n\nfunction isValidPercentValue(value) {\n  return typeof value === \"number\" && value >= 0 && value <= 100;\n} // VTTRegion shim http://dev.w3.org/html5/webvtt/#vttregion-interface\n\n\nfunction VTTRegion() {\n  var _width = 100;\n  var _lines = 3;\n  var _regionAnchorX = 0;\n  var _regionAnchorY = 100;\n  var _viewportAnchorX = 0;\n  var _viewportAnchorY = 100;\n  var _scroll = \"\";\n  Object.defineProperties(this, {\n    \"width\": {\n      enumerable: true,\n      get: function get() {\n        return _width;\n      },\n      set: function set(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"Width must be between 0 and 100.\");\n        }\n\n        _width = value;\n      }\n    },\n    \"lines\": {\n      enumerable: true,\n      get: function get() {\n        return _lines;\n      },\n      set: function set(value) {\n        if (typeof value !== \"number\") {\n          throw new TypeError(\"Lines must be set to a number.\");\n        }\n\n        _lines = value;\n      }\n    },\n    \"regionAnchorY\": {\n      enumerable: true,\n      get: function get() {\n        return _regionAnchorY;\n      },\n      set: function set(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"RegionAnchorX must be between 0 and 100.\");\n        }\n\n        _regionAnchorY = value;\n      }\n    },\n    \"regionAnchorX\": {\n      enumerable: true,\n      get: function get() {\n        return _regionAnchorX;\n      },\n      set: function set(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"RegionAnchorY must be between 0 and 100.\");\n        }\n\n        _regionAnchorX = value;\n      }\n    },\n    \"viewportAnchorY\": {\n      enumerable: true,\n      get: function get() {\n        return _viewportAnchorY;\n      },\n      set: function set(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"ViewportAnchorY must be between 0 and 100.\");\n        }\n\n        _viewportAnchorY = value;\n      }\n    },\n    \"viewportAnchorX\": {\n      enumerable: true,\n      get: function get() {\n        return _viewportAnchorX;\n      },\n      set: function set(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"ViewportAnchorX must be between 0 and 100.\");\n        }\n\n        _viewportAnchorX = value;\n      }\n    },\n    \"scroll\": {\n      enumerable: true,\n      get: function get() {\n        return _scroll;\n      },\n      set: function set(value) {\n        var setting = findScrollSetting(value); // Have to check for false as an empty string is a legal value.\n\n        if (setting === false) {\n          throw new SyntaxError(\"An invalid or illegal string was specified.\");\n        }\n\n        _scroll = setting;\n      }\n    }\n  });\n}\n\nmodule.exports = VTTRegion;","// see https://tools.ietf.org/html/rfc1808\n\n/* jshint ignore:start */\n(function (root) {\n  /* jshint ignore:end */\n  var URL_REGEX = /^((?:[a-zA-Z0-9+\\-.]+:)?)(\\/\\/[^\\/?#]*)?((?:[^\\/\\?#]*\\/)*.*?)??(;.*?)?(\\?.*?)?(#.*?)?$/;\n  var FIRST_SEGMENT_REGEX = /^([^\\/?#]*)(.*)$/;\n  var SLASH_DOT_REGEX = /(?:\\/|^)\\.(?=\\/)/g;\n  var SLASH_DOT_DOT_REGEX = /(?:\\/|^)\\.\\.\\/(?!\\.\\.\\/).*?(?=\\/)/g;\n  var URLToolkit = {\n    // jshint ignore:line\n    // If opts.alwaysNormalize is true then the path will always be normalized even when it starts with / or //\n    // E.g\n    // With opts.alwaysNormalize = false (default, spec compliant)\n    // http://a.com/b/cd + /e/f/../g => http://a.com/e/f/../g\n    // With opts.alwaysNormalize = true (not spec compliant)\n    // http://a.com/b/cd + /e/f/../g => http://a.com/e/g\n    buildAbsoluteURL: function buildAbsoluteURL(baseURL, relativeURL, opts) {\n      opts = opts || {}; // remove any remaining space and CRLF\n\n      baseURL = baseURL.trim();\n      relativeURL = relativeURL.trim();\n\n      if (!relativeURL) {\n        // 2a) If the embedded URL is entirely empty, it inherits the\n        // entire base URL (i.e., is set equal to the base URL)\n        // and we are done.\n        if (!opts.alwaysNormalize) {\n          return baseURL;\n        }\n\n        var basePartsForNormalise = URLToolkit.parseURL(baseURL);\n\n        if (!basePartsForNormalise) {\n          throw new Error('Error trying to parse base URL.');\n        }\n\n        basePartsForNormalise.path = URLToolkit.normalizePath(basePartsForNormalise.path);\n        return URLToolkit.buildURLFromParts(basePartsForNormalise);\n      }\n\n      var relativeParts = URLToolkit.parseURL(relativeURL);\n\n      if (!relativeParts) {\n        throw new Error('Error trying to parse relative URL.');\n      }\n\n      if (relativeParts.scheme) {\n        // 2b) If the embedded URL starts with a scheme name, it is\n        // interpreted as an absolute URL and we are done.\n        if (!opts.alwaysNormalize) {\n          return relativeURL;\n        }\n\n        relativeParts.path = URLToolkit.normalizePath(relativeParts.path);\n        return URLToolkit.buildURLFromParts(relativeParts);\n      }\n\n      var baseParts = URLToolkit.parseURL(baseURL);\n\n      if (!baseParts) {\n        throw new Error('Error trying to parse base URL.');\n      }\n\n      if (!baseParts.netLoc && baseParts.path && baseParts.path[0] !== '/') {\n        // If netLoc missing and path doesn't start with '/', assume everthing before the first '/' is the netLoc\n        // This causes 'example.com/a' to be handled as '//example.com/a' instead of '/example.com/a'\n        var pathParts = FIRST_SEGMENT_REGEX.exec(baseParts.path);\n        baseParts.netLoc = pathParts[1];\n        baseParts.path = pathParts[2];\n      }\n\n      if (baseParts.netLoc && !baseParts.path) {\n        baseParts.path = '/';\n      }\n\n      var builtParts = {\n        // 2c) Otherwise, the embedded URL inherits the scheme of\n        // the base URL.\n        scheme: baseParts.scheme,\n        netLoc: relativeParts.netLoc,\n        path: null,\n        params: relativeParts.params,\n        query: relativeParts.query,\n        fragment: relativeParts.fragment\n      };\n\n      if (!relativeParts.netLoc) {\n        // 3) If the embedded URL's <net_loc> is non-empty, we skip to\n        // Step 7.  Otherwise, the embedded URL inherits the <net_loc>\n        // (if any) of the base URL.\n        builtParts.netLoc = baseParts.netLoc; // 4) If the embedded URL path is preceded by a slash \"/\", the\n        // path is not relative and we skip to Step 7.\n\n        if (relativeParts.path[0] !== '/') {\n          if (!relativeParts.path) {\n            // 5) If the embedded URL path is empty (and not preceded by a\n            // slash), then the embedded URL inherits the base URL path\n            builtParts.path = baseParts.path; // 5a) if the embedded URL's <params> is non-empty, we skip to\n            // step 7; otherwise, it inherits the <params> of the base\n            // URL (if any) and\n\n            if (!relativeParts.params) {\n              builtParts.params = baseParts.params; // 5b) if the embedded URL's <query> is non-empty, we skip to\n              // step 7; otherwise, it inherits the <query> of the base\n              // URL (if any) and we skip to step 7.\n\n              if (!relativeParts.query) {\n                builtParts.query = baseParts.query;\n              }\n            }\n          } else {\n            // 6) The last segment of the base URL's path (anything\n            // following the rightmost slash \"/\", or the entire path if no\n            // slash is present) is removed and the embedded URL's path is\n            // appended in its place.\n            var baseURLPath = baseParts.path;\n            var newPath = baseURLPath.substring(0, baseURLPath.lastIndexOf('/') + 1) + relativeParts.path;\n            builtParts.path = URLToolkit.normalizePath(newPath);\n          }\n        }\n      }\n\n      if (builtParts.path === null) {\n        builtParts.path = opts.alwaysNormalize ? URLToolkit.normalizePath(relativeParts.path) : relativeParts.path;\n      }\n\n      return URLToolkit.buildURLFromParts(builtParts);\n    },\n    parseURL: function parseURL(url) {\n      var parts = URL_REGEX.exec(url);\n\n      if (!parts) {\n        return null;\n      }\n\n      return {\n        scheme: parts[1] || '',\n        netLoc: parts[2] || '',\n        path: parts[3] || '',\n        params: parts[4] || '',\n        query: parts[5] || '',\n        fragment: parts[6] || ''\n      };\n    },\n    normalizePath: function normalizePath(path) {\n      // The following operations are\n      // then applied, in order, to the new path:\n      // 6a) All occurrences of \"./\", where \".\" is a complete path\n      // segment, are removed.\n      // 6b) If the path ends with \".\" as a complete path segment,\n      // that \".\" is removed.\n      path = path.split('').reverse().join('').replace(SLASH_DOT_REGEX, ''); // 6c) All occurrences of \"<segment>/../\", where <segment> is a\n      // complete path segment not equal to \"..\", are removed.\n      // Removal of these path segments is performed iteratively,\n      // removing the leftmost matching pattern on each iteration,\n      // until no matching pattern remains.\n      // 6d) If the path ends with \"<segment>/..\", where <segment> is a\n      // complete path segment not equal to \"..\", that\n      // \"<segment>/..\" is removed.\n\n      while (path.length !== (path = path.replace(SLASH_DOT_DOT_REGEX, '')).length) {} // jshint ignore:line\n\n\n      return path.split('').reverse().join('');\n    },\n    buildURLFromParts: function buildURLFromParts(parts) {\n      return parts.scheme + parts.netLoc + parts.path + parts.params + parts.query + parts.fragment;\n    }\n  };\n  /* jshint ignore:start */\n\n  if (typeof exports === 'object' && typeof module === 'object') module.exports = URLToolkit;else if (typeof define === 'function' && define.amd) define([], function () {\n    return URLToolkit;\n  });else if (typeof exports === 'object') exports[\"URLToolkit\"] = URLToolkit;else root[\"URLToolkit\"] = URLToolkit;\n})(this);\n/* jshint ignore:end */","/*! @name mpd-parser @version 0.8.1 @license Apache-2.0 */\nimport window$1 from 'global/window';\nvar version = \"0.8.1\";\n\nvar isObject = function isObject(obj) {\n  return !!obj && typeof obj === 'object';\n};\n\nvar merge = function merge() {\n  for (var _len = arguments.length, objects = new Array(_len), _key = 0; _key < _len; _key++) {\n    objects[_key] = arguments[_key];\n  }\n\n  return objects.reduce(function (result, source) {\n    Object.keys(source).forEach(function (key) {\n      if (Array.isArray(result[key]) && Array.isArray(source[key])) {\n        result[key] = result[key].concat(source[key]);\n      } else if (isObject(result[key]) && isObject(source[key])) {\n        result[key] = merge(result[key], source[key]);\n      } else {\n        result[key] = source[key];\n      }\n    });\n    return result;\n  }, {});\n};\n\nvar values = function values(o) {\n  return Object.keys(o).map(function (k) {\n    return o[k];\n  });\n};\n\nvar range = function range(start, end) {\n  var result = [];\n\n  for (var i = start; i < end; i++) {\n    result.push(i);\n  }\n\n  return result;\n};\n\nvar flatten = function flatten(lists) {\n  return lists.reduce(function (x, y) {\n    return x.concat(y);\n  }, []);\n};\n\nvar from = function from(list) {\n  if (!list.length) {\n    return [];\n  }\n\n  var result = [];\n\n  for (var i = 0; i < list.length; i++) {\n    result.push(list[i]);\n  }\n\n  return result;\n};\n\nvar findIndexes = function findIndexes(l, key) {\n  return l.reduce(function (a, e, i) {\n    if (e[key]) {\n      a.push(i);\n    }\n\n    return a;\n  }, []);\n};\n\nvar errors = {\n  INVALID_NUMBER_OF_PERIOD: 'INVALID_NUMBER_OF_PERIOD',\n  DASH_EMPTY_MANIFEST: 'DASH_EMPTY_MANIFEST',\n  DASH_INVALID_XML: 'DASH_INVALID_XML',\n  NO_BASE_URL: 'NO_BASE_URL',\n  MISSING_SEGMENT_INFORMATION: 'MISSING_SEGMENT_INFORMATION',\n  SEGMENT_TIME_UNSPECIFIED: 'SEGMENT_TIME_UNSPECIFIED',\n  UNSUPPORTED_UTC_TIMING_SCHEME: 'UNSUPPORTED_UTC_TIMING_SCHEME'\n};\nvar commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};\n\nfunction createCommonjsModule(fn, module) {\n  return module = {\n    exports: {}\n  }, fn(module, module.exports), module.exports;\n}\n\nvar urlToolkit = createCommonjsModule(function (module, exports) {\n  // see https://tools.ietf.org/html/rfc1808\n\n  /* jshint ignore:start */\n  (function (root) {\n    /* jshint ignore:end */\n    var URL_REGEX = /^((?:[a-zA-Z0-9+\\-.]+:)?)(\\/\\/[^\\/?#]*)?((?:[^\\/\\?#]*\\/)*.*?)??(;.*?)?(\\?.*?)?(#.*?)?$/;\n    var FIRST_SEGMENT_REGEX = /^([^\\/?#]*)(.*)$/;\n    var SLASH_DOT_REGEX = /(?:\\/|^)\\.(?=\\/)/g;\n    var SLASH_DOT_DOT_REGEX = /(?:\\/|^)\\.\\.\\/(?!\\.\\.\\/).*?(?=\\/)/g;\n    var URLToolkit = {\n      // jshint ignore:line\n      // If opts.alwaysNormalize is true then the path will always be normalized even when it starts with / or //\n      // E.g\n      // With opts.alwaysNormalize = false (default, spec compliant)\n      // http://a.com/b/cd + /e/f/../g => http://a.com/e/f/../g\n      // With opts.alwaysNormalize = true (not spec compliant)\n      // http://a.com/b/cd + /e/f/../g => http://a.com/e/g\n      buildAbsoluteURL: function buildAbsoluteURL(baseURL, relativeURL, opts) {\n        opts = opts || {}; // remove any remaining space and CRLF\n\n        baseURL = baseURL.trim();\n        relativeURL = relativeURL.trim();\n\n        if (!relativeURL) {\n          // 2a) If the embedded URL is entirely empty, it inherits the\n          // entire base URL (i.e., is set equal to the base URL)\n          // and we are done.\n          if (!opts.alwaysNormalize) {\n            return baseURL;\n          }\n\n          var basePartsForNormalise = URLToolkit.parseURL(baseURL);\n\n          if (!basePartsForNormalise) {\n            throw new Error('Error trying to parse base URL.');\n          }\n\n          basePartsForNormalise.path = URLToolkit.normalizePath(basePartsForNormalise.path);\n          return URLToolkit.buildURLFromParts(basePartsForNormalise);\n        }\n\n        var relativeParts = URLToolkit.parseURL(relativeURL);\n\n        if (!relativeParts) {\n          throw new Error('Error trying to parse relative URL.');\n        }\n\n        if (relativeParts.scheme) {\n          // 2b) If the embedded URL starts with a scheme name, it is\n          // interpreted as an absolute URL and we are done.\n          if (!opts.alwaysNormalize) {\n            return relativeURL;\n          }\n\n          relativeParts.path = URLToolkit.normalizePath(relativeParts.path);\n          return URLToolkit.buildURLFromParts(relativeParts);\n        }\n\n        var baseParts = URLToolkit.parseURL(baseURL);\n\n        if (!baseParts) {\n          throw new Error('Error trying to parse base URL.');\n        }\n\n        if (!baseParts.netLoc && baseParts.path && baseParts.path[0] !== '/') {\n          // If netLoc missing and path doesn't start with '/', assume everthing before the first '/' is the netLoc\n          // This causes 'example.com/a' to be handled as '//example.com/a' instead of '/example.com/a'\n          var pathParts = FIRST_SEGMENT_REGEX.exec(baseParts.path);\n          baseParts.netLoc = pathParts[1];\n          baseParts.path = pathParts[2];\n        }\n\n        if (baseParts.netLoc && !baseParts.path) {\n          baseParts.path = '/';\n        }\n\n        var builtParts = {\n          // 2c) Otherwise, the embedded URL inherits the scheme of\n          // the base URL.\n          scheme: baseParts.scheme,\n          netLoc: relativeParts.netLoc,\n          path: null,\n          params: relativeParts.params,\n          query: relativeParts.query,\n          fragment: relativeParts.fragment\n        };\n\n        if (!relativeParts.netLoc) {\n          // 3) If the embedded URL's <net_loc> is non-empty, we skip to\n          // Step 7.  Otherwise, the embedded URL inherits the <net_loc>\n          // (if any) of the base URL.\n          builtParts.netLoc = baseParts.netLoc; // 4) If the embedded URL path is preceded by a slash \"/\", the\n          // path is not relative and we skip to Step 7.\n\n          if (relativeParts.path[0] !== '/') {\n            if (!relativeParts.path) {\n              // 5) If the embedded URL path is empty (and not preceded by a\n              // slash), then the embedded URL inherits the base URL path\n              builtParts.path = baseParts.path; // 5a) if the embedded URL's <params> is non-empty, we skip to\n              // step 7; otherwise, it inherits the <params> of the base\n              // URL (if any) and\n\n              if (!relativeParts.params) {\n                builtParts.params = baseParts.params; // 5b) if the embedded URL's <query> is non-empty, we skip to\n                // step 7; otherwise, it inherits the <query> of the base\n                // URL (if any) and we skip to step 7.\n\n                if (!relativeParts.query) {\n                  builtParts.query = baseParts.query;\n                }\n              }\n            } else {\n              // 6) The last segment of the base URL's path (anything\n              // following the rightmost slash \"/\", or the entire path if no\n              // slash is present) is removed and the embedded URL's path is\n              // appended in its place.\n              var baseURLPath = baseParts.path;\n              var newPath = baseURLPath.substring(0, baseURLPath.lastIndexOf('/') + 1) + relativeParts.path;\n              builtParts.path = URLToolkit.normalizePath(newPath);\n            }\n          }\n        }\n\n        if (builtParts.path === null) {\n          builtParts.path = opts.alwaysNormalize ? URLToolkit.normalizePath(relativeParts.path) : relativeParts.path;\n        }\n\n        return URLToolkit.buildURLFromParts(builtParts);\n      },\n      parseURL: function parseURL(url) {\n        var parts = URL_REGEX.exec(url);\n\n        if (!parts) {\n          return null;\n        }\n\n        return {\n          scheme: parts[1] || '',\n          netLoc: parts[2] || '',\n          path: parts[3] || '',\n          params: parts[4] || '',\n          query: parts[5] || '',\n          fragment: parts[6] || ''\n        };\n      },\n      normalizePath: function normalizePath(path) {\n        // The following operations are\n        // then applied, in order, to the new path:\n        // 6a) All occurrences of \"./\", where \".\" is a complete path\n        // segment, are removed.\n        // 6b) If the path ends with \".\" as a complete path segment,\n        // that \".\" is removed.\n        path = path.split('').reverse().join('').replace(SLASH_DOT_REGEX, ''); // 6c) All occurrences of \"<segment>/../\", where <segment> is a\n        // complete path segment not equal to \"..\", are removed.\n        // Removal of these path segments is performed iteratively,\n        // removing the leftmost matching pattern on each iteration,\n        // until no matching pattern remains.\n        // 6d) If the path ends with \"<segment>/..\", where <segment> is a\n        // complete path segment not equal to \"..\", that\n        // \"<segment>/..\" is removed.\n\n        while (path.length !== (path = path.replace(SLASH_DOT_DOT_REGEX, '')).length) {} // jshint ignore:line\n\n\n        return path.split('').reverse().join('');\n      },\n      buildURLFromParts: function buildURLFromParts(parts) {\n        return parts.scheme + parts.netLoc + parts.path + parts.params + parts.query + parts.fragment;\n      }\n    };\n    /* jshint ignore:start */\n\n    module.exports = URLToolkit;\n  })(commonjsGlobal);\n  /* jshint ignore:end */\n\n});\n\nvar resolveUrl = function resolveUrl(baseUrl, relativeUrl) {\n  // return early if we don't need to resolve\n  if (/^[a-z]+:/i.test(relativeUrl)) {\n    return relativeUrl;\n  } // if the base URL is relative then combine with the current location\n\n\n  if (!/\\/\\//i.test(baseUrl)) {\n    baseUrl = urlToolkit.buildAbsoluteURL(window$1.location.href, baseUrl);\n  }\n\n  return urlToolkit.buildAbsoluteURL(baseUrl, relativeUrl);\n};\n/**\n * @typedef {Object} SingleUri\n * @property {string} uri - relative location of segment\n * @property {string} resolvedUri - resolved location of segment\n * @property {Object} byterange - Object containing information on how to make byte range\n *   requests following byte-range-spec per RFC2616.\n * @property {String} byterange.length - length of range request\n * @property {String} byterange.offset - byte offset of range request\n *\n * @see https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.1\n */\n\n/**\n * Converts a URLType node (5.3.9.2.3 Table 13) to a segment object\n * that conforms to how m3u8-parser is structured\n *\n * @see https://github.com/videojs/m3u8-parser\n *\n * @param {string} baseUrl - baseUrl provided by <BaseUrl> nodes\n * @param {string} source - source url for segment\n * @param {string} range - optional range used for range calls,\n *   follows  RFC 2616, Clause 14.35.1\n * @return {SingleUri} full segment information transformed into a format similar\n *   to m3u8-parser\n */\n\n\nvar urlTypeToSegment = function urlTypeToSegment(_ref) {\n  var _ref$baseUrl = _ref.baseUrl,\n      baseUrl = _ref$baseUrl === void 0 ? '' : _ref$baseUrl,\n      _ref$source = _ref.source,\n      source = _ref$source === void 0 ? '' : _ref$source,\n      _ref$range = _ref.range,\n      range = _ref$range === void 0 ? '' : _ref$range,\n      _ref$indexRange = _ref.indexRange,\n      indexRange = _ref$indexRange === void 0 ? '' : _ref$indexRange;\n  var segment = {\n    uri: source,\n    resolvedUri: resolveUrl(baseUrl || '', source)\n  };\n\n  if (range || indexRange) {\n    var rangeStr = range ? range : indexRange;\n    var ranges = rangeStr.split('-');\n    var startRange = parseInt(ranges[0], 10);\n    var endRange = parseInt(ranges[1], 10); // byterange should be inclusive according to\n    // RFC 2616, Clause 14.35.1\n\n    segment.byterange = {\n      length: endRange - startRange + 1,\n      offset: startRange\n    };\n  }\n\n  return segment;\n};\n\nvar byteRangeToString = function byteRangeToString(byterange) {\n  // `endRange` is one less than `offset + length` because the HTTP range\n  // header uses inclusive ranges\n  var endRange = byterange.offset + byterange.length - 1;\n  return byterange.offset + \"-\" + endRange;\n};\n/**\n * Functions for calculating the range of available segments in static and dynamic\n * manifests.\n */\n\n\nvar segmentRange = {\n  /**\n   * Returns the entire range of available segments for a static MPD\n   *\n   * @param {Object} attributes\n   *        Inheritied MPD attributes\n   * @return {{ start: number, end: number }}\n   *         The start and end numbers for available segments\n   */\n  static: function _static(attributes) {\n    var duration = attributes.duration,\n        _attributes$timescale = attributes.timescale,\n        timescale = _attributes$timescale === void 0 ? 1 : _attributes$timescale,\n        sourceDuration = attributes.sourceDuration;\n    return {\n      start: 0,\n      end: Math.ceil(sourceDuration / (duration / timescale))\n    };\n  },\n\n  /**\n   * Returns the current live window range of available segments for a dynamic MPD\n   *\n   * @param {Object} attributes\n   *        Inheritied MPD attributes\n   * @return {{ start: number, end: number }}\n   *         The start and end numbers for available segments\n   */\n  dynamic: function dynamic(attributes) {\n    var NOW = attributes.NOW,\n        clientOffset = attributes.clientOffset,\n        availabilityStartTime = attributes.availabilityStartTime,\n        _attributes$timescale2 = attributes.timescale,\n        timescale = _attributes$timescale2 === void 0 ? 1 : _attributes$timescale2,\n        duration = attributes.duration,\n        _attributes$start = attributes.start,\n        start = _attributes$start === void 0 ? 0 : _attributes$start,\n        _attributes$minimumUp = attributes.minimumUpdatePeriod,\n        minimumUpdatePeriod = _attributes$minimumUp === void 0 ? 0 : _attributes$minimumUp,\n        _attributes$timeShift = attributes.timeShiftBufferDepth,\n        timeShiftBufferDepth = _attributes$timeShift === void 0 ? Infinity : _attributes$timeShift;\n    var now = (NOW + clientOffset) / 1000;\n    var periodStartWC = availabilityStartTime + start;\n    var periodEndWC = now + minimumUpdatePeriod;\n    var periodDuration = periodEndWC - periodStartWC;\n    var segmentCount = Math.ceil(periodDuration * timescale / duration);\n    var availableStart = Math.floor((now - periodStartWC - timeShiftBufferDepth) * timescale / duration);\n    var availableEnd = Math.floor((now - periodStartWC) * timescale / duration);\n    return {\n      start: Math.max(0, availableStart),\n      end: Math.min(segmentCount, availableEnd)\n    };\n  }\n};\n/**\n * Maps a range of numbers to objects with information needed to build the corresponding\n * segment list\n *\n * @name toSegmentsCallback\n * @function\n * @param {number} number\n *        Number of the segment\n * @param {number} index\n *        Index of the number in the range list\n * @return {{ number: Number, duration: Number, timeline: Number, time: Number }}\n *         Object with segment timing and duration info\n */\n\n/**\n * Returns a callback for Array.prototype.map for mapping a range of numbers to\n * information needed to build the segment list.\n *\n * @param {Object} attributes\n *        Inherited MPD attributes\n * @return {toSegmentsCallback}\n *         Callback map function\n */\n\nvar toSegments = function toSegments(attributes) {\n  return function (number, index) {\n    var duration = attributes.duration,\n        _attributes$timescale3 = attributes.timescale,\n        timescale = _attributes$timescale3 === void 0 ? 1 : _attributes$timescale3,\n        periodIndex = attributes.periodIndex,\n        _attributes$startNumb = attributes.startNumber,\n        startNumber = _attributes$startNumb === void 0 ? 1 : _attributes$startNumb;\n    return {\n      number: startNumber + number,\n      duration: duration / timescale,\n      timeline: periodIndex,\n      time: index * duration\n    };\n  };\n};\n/**\n * Returns a list of objects containing segment timing and duration info used for\n * building the list of segments. This uses the @duration attribute specified\n * in the MPD manifest to derive the range of segments.\n *\n * @param {Object} attributes\n *        Inherited MPD attributes\n * @return {{number: number, duration: number, time: number, timeline: number}[]}\n *         List of Objects with segment timing and duration info\n */\n\n\nvar parseByDuration = function parseByDuration(attributes) {\n  var _attributes$type = attributes.type,\n      type = _attributes$type === void 0 ? 'static' : _attributes$type,\n      duration = attributes.duration,\n      _attributes$timescale4 = attributes.timescale,\n      timescale = _attributes$timescale4 === void 0 ? 1 : _attributes$timescale4,\n      sourceDuration = attributes.sourceDuration;\n\n  var _segmentRange$type = segmentRange[type](attributes),\n      start = _segmentRange$type.start,\n      end = _segmentRange$type.end;\n\n  var segments = range(start, end).map(toSegments(attributes));\n\n  if (type === 'static') {\n    var index = segments.length - 1; // final segment may be less than full segment duration\n\n    segments[index].duration = sourceDuration - duration / timescale * index;\n  }\n\n  return segments;\n};\n/**\n * Translates SegmentBase into a set of segments.\n * (DASH SPEC Section 5.3.9.3.2) contains a set of <SegmentURL> nodes.  Each\n * node should be translated into segment.\n *\n * @param {Object} attributes\n *   Object containing all inherited attributes from parent elements with attribute\n *   names as keys\n * @return {Object.<Array>} list of segments\n */\n\n\nvar segmentsFromBase = function segmentsFromBase(attributes) {\n  var baseUrl = attributes.baseUrl,\n      _attributes$initializ = attributes.initialization,\n      initialization = _attributes$initializ === void 0 ? {} : _attributes$initializ,\n      sourceDuration = attributes.sourceDuration,\n      _attributes$timescale = attributes.timescale,\n      timescale = _attributes$timescale === void 0 ? 1 : _attributes$timescale,\n      _attributes$indexRang = attributes.indexRange,\n      indexRange = _attributes$indexRang === void 0 ? '' : _attributes$indexRang,\n      duration = attributes.duration; // base url is required for SegmentBase to work, per spec (Section 5.3.9.2.1)\n\n  if (!baseUrl) {\n    throw new Error(errors.NO_BASE_URL);\n  }\n\n  var initSegment = urlTypeToSegment({\n    baseUrl: baseUrl,\n    source: initialization.sourceURL,\n    range: initialization.range\n  });\n  var segment = urlTypeToSegment({\n    baseUrl: baseUrl,\n    source: baseUrl,\n    indexRange: indexRange\n  });\n  segment.map = initSegment; // If there is a duration, use it, otherwise use the given duration of the source\n  // (since SegmentBase is only for one total segment)\n\n  if (duration) {\n    var segmentTimeInfo = parseByDuration(attributes);\n\n    if (segmentTimeInfo.length) {\n      segment.duration = segmentTimeInfo[0].duration;\n      segment.timeline = segmentTimeInfo[0].timeline;\n    }\n  } else if (sourceDuration) {\n    segment.duration = sourceDuration / timescale;\n    segment.timeline = 0;\n  } // This is used for mediaSequence\n\n\n  segment.number = 0;\n  return [segment];\n};\n/**\n * Given a playlist, a sidx box, and a baseUrl, update the segment list of the playlist\n * according to the sidx information given.\n *\n * playlist.sidx has metadadata about the sidx where-as the sidx param\n * is the parsed sidx box itself.\n *\n * @param {Object} playlist the playlist to update the sidx information for\n * @param {Object} sidx the parsed sidx box\n * @return {Object} the playlist object with the updated sidx information\n */\n\n\nvar addSegmentsToPlaylist = function addSegmentsToPlaylist(playlist, sidx, baseUrl) {\n  // Retain init segment information\n  var initSegment = playlist.sidx.map ? playlist.sidx.map : null; // Retain source duration from initial master manifest parsing\n\n  var sourceDuration = playlist.sidx.duration; // Retain source timeline\n\n  var timeline = playlist.timeline || 0;\n  var sidxByteRange = playlist.sidx.byterange;\n  var sidxEnd = sidxByteRange.offset + sidxByteRange.length; // Retain timescale of the parsed sidx\n\n  var timescale = sidx.timescale; // referenceType 1 refers to other sidx boxes\n\n  var mediaReferences = sidx.references.filter(function (r) {\n    return r.referenceType !== 1;\n  });\n  var segments = []; // firstOffset is the offset from the end of the sidx box\n\n  var startIndex = sidxEnd + sidx.firstOffset;\n\n  for (var i = 0; i < mediaReferences.length; i++) {\n    var reference = sidx.references[i]; // size of the referenced (sub)segment\n\n    var size = reference.referencedSize; // duration of the referenced (sub)segment, in  the  timescale\n    // this will be converted to seconds when generating segments\n\n    var duration = reference.subsegmentDuration; // should be an inclusive range\n\n    var endIndex = startIndex + size - 1;\n    var indexRange = startIndex + \"-\" + endIndex;\n    var attributes = {\n      baseUrl: baseUrl,\n      timescale: timescale,\n      timeline: timeline,\n      // this is used in parseByDuration\n      periodIndex: timeline,\n      duration: duration,\n      sourceDuration: sourceDuration,\n      indexRange: indexRange\n    };\n    var segment = segmentsFromBase(attributes)[0];\n\n    if (initSegment) {\n      segment.map = initSegment;\n    }\n\n    segments.push(segment);\n    startIndex += size;\n  }\n\n  playlist.segments = segments;\n  return playlist;\n};\n\nvar mergeDiscontiguousPlaylists = function mergeDiscontiguousPlaylists(playlists) {\n  var mergedPlaylists = values(playlists.reduce(function (acc, playlist) {\n    // assuming playlist IDs are the same across periods\n    // TODO: handle multiperiod where representation sets are not the same\n    // across periods\n    var name = playlist.attributes.id + (playlist.attributes.lang || ''); // Periods after first\n\n    if (acc[name]) {\n      var _acc$name$segments; // first segment of subsequent periods signal a discontinuity\n\n\n      if (playlist.segments[0]) {\n        playlist.segments[0].discontinuity = true;\n      }\n\n      (_acc$name$segments = acc[name].segments).push.apply(_acc$name$segments, playlist.segments); // bubble up contentProtection, this assumes all DRM content\n      // has the same contentProtection\n\n\n      if (playlist.attributes.contentProtection) {\n        acc[name].attributes.contentProtection = playlist.attributes.contentProtection;\n      }\n    } else {\n      // first Period\n      acc[name] = playlist;\n    }\n\n    return acc;\n  }, {}));\n  return mergedPlaylists.map(function (playlist) {\n    playlist.discontinuityStarts = findIndexes(playlist.segments, 'discontinuity');\n    return playlist;\n  });\n};\n\nvar addSegmentInfoFromSidx = function addSegmentInfoFromSidx(playlists, sidxMapping) {\n  if (sidxMapping === void 0) {\n    sidxMapping = {};\n  }\n\n  if (!Object.keys(sidxMapping).length) {\n    return playlists;\n  }\n\n  for (var i in playlists) {\n    var playlist = playlists[i];\n\n    if (!playlist.sidx) {\n      continue;\n    }\n\n    var sidxKey = playlist.sidx.uri + '-' + byteRangeToString(playlist.sidx.byterange);\n    var sidxMatch = sidxMapping[sidxKey] && sidxMapping[sidxKey].sidx;\n\n    if (playlist.sidx && sidxMatch) {\n      addSegmentsToPlaylist(playlist, sidxMatch, playlist.sidx.resolvedUri);\n    }\n  }\n\n  return playlists;\n};\n\nvar formatAudioPlaylist = function formatAudioPlaylist(_ref) {\n  var _attributes;\n\n  var attributes = _ref.attributes,\n      segments = _ref.segments,\n      sidx = _ref.sidx;\n  var playlist = {\n    attributes: (_attributes = {\n      NAME: attributes.id,\n      BANDWIDTH: attributes.bandwidth,\n      CODECS: attributes.codecs\n    }, _attributes['PROGRAM-ID'] = 1, _attributes),\n    uri: '',\n    endList: (attributes.type || 'static') === 'static',\n    timeline: attributes.periodIndex,\n    resolvedUri: '',\n    targetDuration: attributes.duration,\n    segments: segments,\n    mediaSequence: segments.length ? segments[0].number : 1\n  };\n\n  if (attributes.contentProtection) {\n    playlist.contentProtection = attributes.contentProtection;\n  }\n\n  if (sidx) {\n    playlist.sidx = sidx;\n  }\n\n  return playlist;\n};\n\nvar formatVttPlaylist = function formatVttPlaylist(_ref2) {\n  var _attributes2;\n\n  var attributes = _ref2.attributes,\n      segments = _ref2.segments;\n\n  if (typeof segments === 'undefined') {\n    // vtt tracks may use single file in BaseURL\n    segments = [{\n      uri: attributes.baseUrl,\n      timeline: attributes.periodIndex,\n      resolvedUri: attributes.baseUrl || '',\n      duration: attributes.sourceDuration,\n      number: 0\n    }]; // targetDuration should be the same duration as the only segment\n\n    attributes.duration = attributes.sourceDuration;\n  }\n\n  return {\n    attributes: (_attributes2 = {\n      NAME: attributes.id,\n      BANDWIDTH: attributes.bandwidth\n    }, _attributes2['PROGRAM-ID'] = 1, _attributes2),\n    uri: '',\n    endList: (attributes.type || 'static') === 'static',\n    timeline: attributes.periodIndex,\n    resolvedUri: attributes.baseUrl || '',\n    targetDuration: attributes.duration,\n    segments: segments,\n    mediaSequence: segments.length ? segments[0].number : 1\n  };\n};\n\nvar organizeAudioPlaylists = function organizeAudioPlaylists(playlists, sidxMapping) {\n  if (sidxMapping === void 0) {\n    sidxMapping = {};\n  }\n\n  var mainPlaylist;\n  var formattedPlaylists = playlists.reduce(function (a, playlist) {\n    var role = playlist.attributes.role && playlist.attributes.role.value || '';\n    var language = playlist.attributes.lang || '';\n    var label = 'main';\n\n    if (language) {\n      var roleLabel = role ? \" (\" + role + \")\" : '';\n      label = \"\" + playlist.attributes.lang + roleLabel;\n    } // skip if we already have the highest quality audio for a language\n\n\n    if (a[label] && a[label].playlists[0].attributes.BANDWIDTH > playlist.attributes.bandwidth) {\n      return a;\n    }\n\n    a[label] = {\n      language: language,\n      autoselect: true,\n      default: role === 'main',\n      playlists: addSegmentInfoFromSidx([formatAudioPlaylist(playlist)], sidxMapping),\n      uri: ''\n    };\n\n    if (typeof mainPlaylist === 'undefined' && role === 'main') {\n      mainPlaylist = playlist;\n      mainPlaylist.default = true;\n    }\n\n    return a;\n  }, {}); // if no playlists have role \"main\", mark the first as main\n\n  if (!mainPlaylist) {\n    var firstLabel = Object.keys(formattedPlaylists)[0];\n    formattedPlaylists[firstLabel].default = true;\n  }\n\n  return formattedPlaylists;\n};\n\nvar organizeVttPlaylists = function organizeVttPlaylists(playlists, sidxMapping) {\n  if (sidxMapping === void 0) {\n    sidxMapping = {};\n  }\n\n  return playlists.reduce(function (a, playlist) {\n    var label = playlist.attributes.lang || 'text'; // skip if we already have subtitles\n\n    if (a[label]) {\n      return a;\n    }\n\n    a[label] = {\n      language: label,\n      default: false,\n      autoselect: false,\n      playlists: addSegmentInfoFromSidx([formatVttPlaylist(playlist)], sidxMapping),\n      uri: ''\n    };\n    return a;\n  }, {});\n};\n\nvar formatVideoPlaylist = function formatVideoPlaylist(_ref3) {\n  var _attributes3;\n\n  var attributes = _ref3.attributes,\n      segments = _ref3.segments,\n      sidx = _ref3.sidx;\n  var playlist = {\n    attributes: (_attributes3 = {\n      NAME: attributes.id,\n      AUDIO: 'audio',\n      SUBTITLES: 'subs',\n      RESOLUTION: {\n        width: attributes.width,\n        height: attributes.height\n      },\n      CODECS: attributes.codecs,\n      BANDWIDTH: attributes.bandwidth\n    }, _attributes3['PROGRAM-ID'] = 1, _attributes3),\n    uri: '',\n    endList: (attributes.type || 'static') === 'static',\n    timeline: attributes.periodIndex,\n    resolvedUri: '',\n    targetDuration: attributes.duration,\n    segments: segments,\n    mediaSequence: segments.length ? segments[0].number : 1\n  };\n\n  if (attributes.contentProtection) {\n    playlist.contentProtection = attributes.contentProtection;\n  }\n\n  if (sidx) {\n    playlist.sidx = sidx;\n  }\n\n  return playlist;\n};\n\nvar toM3u8 = function toM3u8(dashPlaylists, sidxMapping) {\n  var _mediaGroups;\n\n  if (sidxMapping === void 0) {\n    sidxMapping = {};\n  }\n\n  if (!dashPlaylists.length) {\n    return {};\n  } // grab all master attributes\n\n\n  var _dashPlaylists$0$attr = dashPlaylists[0].attributes,\n      duration = _dashPlaylists$0$attr.sourceDuration,\n      _dashPlaylists$0$attr2 = _dashPlaylists$0$attr.minimumUpdatePeriod,\n      minimumUpdatePeriod = _dashPlaylists$0$attr2 === void 0 ? 0 : _dashPlaylists$0$attr2;\n\n  var videoOnly = function videoOnly(_ref4) {\n    var attributes = _ref4.attributes;\n    return attributes.mimeType === 'video/mp4' || attributes.contentType === 'video';\n  };\n\n  var audioOnly = function audioOnly(_ref5) {\n    var attributes = _ref5.attributes;\n    return attributes.mimeType === 'audio/mp4' || attributes.contentType === 'audio';\n  };\n\n  var vttOnly = function vttOnly(_ref6) {\n    var attributes = _ref6.attributes;\n    return attributes.mimeType === 'text/vtt' || attributes.contentType === 'text';\n  };\n\n  var videoPlaylists = mergeDiscontiguousPlaylists(dashPlaylists.filter(videoOnly)).map(formatVideoPlaylist);\n  var audioPlaylists = mergeDiscontiguousPlaylists(dashPlaylists.filter(audioOnly));\n  var vttPlaylists = dashPlaylists.filter(vttOnly);\n  var master = {\n    allowCache: true,\n    discontinuityStarts: [],\n    segments: [],\n    endList: true,\n    mediaGroups: (_mediaGroups = {\n      AUDIO: {},\n      VIDEO: {}\n    }, _mediaGroups['CLOSED-CAPTIONS'] = {}, _mediaGroups.SUBTITLES = {}, _mediaGroups),\n    uri: '',\n    duration: duration,\n    playlists: addSegmentInfoFromSidx(videoPlaylists, sidxMapping),\n    minimumUpdatePeriod: minimumUpdatePeriod * 1000\n  };\n\n  if (audioPlaylists.length) {\n    master.mediaGroups.AUDIO.audio = organizeAudioPlaylists(audioPlaylists, sidxMapping);\n  }\n\n  if (vttPlaylists.length) {\n    master.mediaGroups.SUBTITLES.subs = organizeVttPlaylists(vttPlaylists, sidxMapping);\n  }\n\n  return master;\n};\n/**\n * Calculates the R (repetition) value for a live stream (for the final segment\n * in a manifest where the r value is negative 1)\n *\n * @param {Object} attributes\n *        Object containing all inherited attributes from parent elements with attribute\n *        names as keys\n * @param {number} time\n *        current time (typically the total time up until the final segment)\n * @param {number} duration\n *        duration property for the given <S />\n *\n * @return {number}\n *        R value to reach the end of the given period\n */\n\n\nvar getLiveRValue = function getLiveRValue(attributes, time, duration) {\n  var NOW = attributes.NOW,\n      clientOffset = attributes.clientOffset,\n      availabilityStartTime = attributes.availabilityStartTime,\n      _attributes$timescale = attributes.timescale,\n      timescale = _attributes$timescale === void 0 ? 1 : _attributes$timescale,\n      _attributes$start = attributes.start,\n      start = _attributes$start === void 0 ? 0 : _attributes$start,\n      _attributes$minimumUp = attributes.minimumUpdatePeriod,\n      minimumUpdatePeriod = _attributes$minimumUp === void 0 ? 0 : _attributes$minimumUp;\n  var now = (NOW + clientOffset) / 1000;\n  var periodStartWC = availabilityStartTime + start;\n  var periodEndWC = now + minimumUpdatePeriod;\n  var periodDuration = periodEndWC - periodStartWC;\n  return Math.ceil((periodDuration * timescale - time) / duration);\n};\n/**\n * Uses information provided by SegmentTemplate.SegmentTimeline to determine segment\n * timing and duration\n *\n * @param {Object} attributes\n *        Object containing all inherited attributes from parent elements with attribute\n *        names as keys\n * @param {Object[]} segmentTimeline\n *        List of objects representing the attributes of each S element contained within\n *\n * @return {{number: number, duration: number, time: number, timeline: number}[]}\n *         List of Objects with segment timing and duration info\n */\n\n\nvar parseByTimeline = function parseByTimeline(attributes, segmentTimeline) {\n  var _attributes$type = attributes.type,\n      type = _attributes$type === void 0 ? 'static' : _attributes$type,\n      _attributes$minimumUp2 = attributes.minimumUpdatePeriod,\n      minimumUpdatePeriod = _attributes$minimumUp2 === void 0 ? 0 : _attributes$minimumUp2,\n      _attributes$media = attributes.media,\n      media = _attributes$media === void 0 ? '' : _attributes$media,\n      sourceDuration = attributes.sourceDuration,\n      _attributes$timescale2 = attributes.timescale,\n      timescale = _attributes$timescale2 === void 0 ? 1 : _attributes$timescale2,\n      _attributes$startNumb = attributes.startNumber,\n      startNumber = _attributes$startNumb === void 0 ? 1 : _attributes$startNumb,\n      timeline = attributes.periodIndex;\n  var segments = [];\n  var time = -1;\n\n  for (var sIndex = 0; sIndex < segmentTimeline.length; sIndex++) {\n    var S = segmentTimeline[sIndex];\n    var duration = S.d;\n    var repeat = S.r || 0;\n    var segmentTime = S.t || 0;\n\n    if (time < 0) {\n      // first segment\n      time = segmentTime;\n    }\n\n    if (segmentTime && segmentTime > time) {\n      // discontinuity\n      // TODO: How to handle this type of discontinuity\n      // timeline++ here would treat it like HLS discontuity and content would\n      // get appended without gap\n      // E.G.\n      //  <S t=\"0\" d=\"1\" />\n      //  <S d=\"1\" />\n      //  <S d=\"1\" />\n      //  <S t=\"5\" d=\"1\" />\n      // would have $Time$ values of [0, 1, 2, 5]\n      // should this be appened at time positions [0, 1, 2, 3],(#EXT-X-DISCONTINUITY)\n      // or [0, 1, 2, gap, gap, 5]? (#EXT-X-GAP)\n      // does the value of sourceDuration consider this when calculating arbitrary\n      // negative @r repeat value?\n      // E.G. Same elements as above with this added at the end\n      //  <S d=\"1\" r=\"-1\" />\n      //  with a sourceDuration of 10\n      // Would the 2 gaps be included in the time duration calculations resulting in\n      // 8 segments with $Time$ values of [0, 1, 2, 5, 6, 7, 8, 9] or 10 segments\n      // with $Time$ values of [0, 1, 2, 5, 6, 7, 8, 9, 10, 11] ?\n      time = segmentTime;\n    }\n\n    var count = void 0;\n\n    if (repeat < 0) {\n      var nextS = sIndex + 1;\n\n      if (nextS === segmentTimeline.length) {\n        // last segment\n        if (type === 'dynamic' && minimumUpdatePeriod > 0 && media.indexOf('$Number$') > 0) {\n          count = getLiveRValue(attributes, time, duration);\n        } else {\n          // TODO: This may be incorrect depending on conclusion of TODO above\n          count = (sourceDuration * timescale - time) / duration;\n        }\n      } else {\n        count = (segmentTimeline[nextS].t - time) / duration;\n      }\n    } else {\n      count = repeat + 1;\n    }\n\n    var end = startNumber + segments.length + count;\n    var number = startNumber + segments.length;\n\n    while (number < end) {\n      segments.push({\n        number: number,\n        duration: duration / timescale,\n        time: time,\n        timeline: timeline\n      });\n      time += duration;\n      number++;\n    }\n  }\n\n  return segments;\n};\n\nvar identifierPattern = /\\$([A-z]*)(?:(%0)([0-9]+)d)?\\$/g;\n/**\n * Replaces template identifiers with corresponding values. To be used as the callback\n * for String.prototype.replace\n *\n * @name replaceCallback\n * @function\n * @param {string} match\n *        Entire match of identifier\n * @param {string} identifier\n *        Name of matched identifier\n * @param {string} format\n *        Format tag string. Its presence indicates that padding is expected\n * @param {string} width\n *        Desired length of the replaced value. Values less than this width shall be left\n *        zero padded\n * @return {string}\n *         Replacement for the matched identifier\n */\n\n/**\n * Returns a function to be used as a callback for String.prototype.replace to replace\n * template identifiers\n *\n * @param {Obect} values\n *        Object containing values that shall be used to replace known identifiers\n * @param {number} values.RepresentationID\n *        Value of the Representation@id attribute\n * @param {number} values.Number\n *        Number of the corresponding segment\n * @param {number} values.Bandwidth\n *        Value of the Representation@bandwidth attribute.\n * @param {number} values.Time\n *        Timestamp value of the corresponding segment\n * @return {replaceCallback}\n *         Callback to be used with String.prototype.replace to replace identifiers\n */\n\nvar identifierReplacement = function identifierReplacement(values) {\n  return function (match, identifier, format, width) {\n    if (match === '$$') {\n      // escape sequence\n      return '$';\n    }\n\n    if (typeof values[identifier] === 'undefined') {\n      return match;\n    }\n\n    var value = '' + values[identifier];\n\n    if (identifier === 'RepresentationID') {\n      // Format tag shall not be present with RepresentationID\n      return value;\n    }\n\n    if (!format) {\n      width = 1;\n    } else {\n      width = parseInt(width, 10);\n    }\n\n    if (value.length >= width) {\n      return value;\n    }\n\n    return \"\" + new Array(width - value.length + 1).join('0') + value;\n  };\n};\n/**\n * Constructs a segment url from a template string\n *\n * @param {string} url\n *        Template string to construct url from\n * @param {Obect} values\n *        Object containing values that shall be used to replace known identifiers\n * @param {number} values.RepresentationID\n *        Value of the Representation@id attribute\n * @param {number} values.Number\n *        Number of the corresponding segment\n * @param {number} values.Bandwidth\n *        Value of the Representation@bandwidth attribute.\n * @param {number} values.Time\n *        Timestamp value of the corresponding segment\n * @return {string}\n *         Segment url with identifiers replaced\n */\n\n\nvar constructTemplateUrl = function constructTemplateUrl(url, values) {\n  return url.replace(identifierPattern, identifierReplacement(values));\n};\n/**\n * Generates a list of objects containing timing and duration information about each\n * segment needed to generate segment uris and the complete segment object\n *\n * @param {Object} attributes\n *        Object containing all inherited attributes from parent elements with attribute\n *        names as keys\n * @param {Object[]|undefined} segmentTimeline\n *        List of objects representing the attributes of each S element contained within\n *        the SegmentTimeline element\n * @return {{number: number, duration: number, time: number, timeline: number}[]}\n *         List of Objects with segment timing and duration info\n */\n\n\nvar parseTemplateInfo = function parseTemplateInfo(attributes, segmentTimeline) {\n  if (!attributes.duration && !segmentTimeline) {\n    // if neither @duration or SegmentTimeline are present, then there shall be exactly\n    // one media segment\n    return [{\n      number: attributes.startNumber || 1,\n      duration: attributes.sourceDuration,\n      time: 0,\n      timeline: attributes.periodIndex\n    }];\n  }\n\n  if (attributes.duration) {\n    return parseByDuration(attributes);\n  }\n\n  return parseByTimeline(attributes, segmentTimeline);\n};\n/**\n * Generates a list of segments using information provided by the SegmentTemplate element\n *\n * @param {Object} attributes\n *        Object containing all inherited attributes from parent elements with attribute\n *        names as keys\n * @param {Object[]|undefined} segmentTimeline\n *        List of objects representing the attributes of each S element contained within\n *        the SegmentTimeline element\n * @return {Object[]}\n *         List of segment objects\n */\n\n\nvar segmentsFromTemplate = function segmentsFromTemplate(attributes, segmentTimeline) {\n  var templateValues = {\n    RepresentationID: attributes.id,\n    Bandwidth: attributes.bandwidth || 0\n  };\n  var _attributes$initializ = attributes.initialization,\n      initialization = _attributes$initializ === void 0 ? {\n    sourceURL: '',\n    range: ''\n  } : _attributes$initializ;\n  var mapSegment = urlTypeToSegment({\n    baseUrl: attributes.baseUrl,\n    source: constructTemplateUrl(initialization.sourceURL, templateValues),\n    range: initialization.range\n  });\n  var segments = parseTemplateInfo(attributes, segmentTimeline);\n  return segments.map(function (segment) {\n    templateValues.Number = segment.number;\n    templateValues.Time = segment.time;\n    var uri = constructTemplateUrl(attributes.media || '', templateValues);\n    return {\n      uri: uri,\n      timeline: segment.timeline,\n      duration: segment.duration,\n      resolvedUri: resolveUrl(attributes.baseUrl || '', uri),\n      map: mapSegment,\n      number: segment.number\n    };\n  });\n};\n/**\n * Converts a <SegmentUrl> (of type URLType from the DASH spec 5.3.9.2 Table 14)\n * to an object that matches the output of a segment in videojs/mpd-parser\n *\n * @param {Object} attributes\n *   Object containing all inherited attributes from parent elements with attribute\n *   names as keys\n * @param {Object} segmentUrl\n *   <SegmentURL> node to translate into a segment object\n * @return {Object} translated segment object\n */\n\n\nvar SegmentURLToSegmentObject = function SegmentURLToSegmentObject(attributes, segmentUrl) {\n  var baseUrl = attributes.baseUrl,\n      _attributes$initializ = attributes.initialization,\n      initialization = _attributes$initializ === void 0 ? {} : _attributes$initializ;\n  var initSegment = urlTypeToSegment({\n    baseUrl: baseUrl,\n    source: initialization.sourceURL,\n    range: initialization.range\n  });\n  var segment = urlTypeToSegment({\n    baseUrl: baseUrl,\n    source: segmentUrl.media,\n    range: segmentUrl.mediaRange\n  });\n  segment.map = initSegment;\n  return segment;\n};\n/**\n * Generates a list of segments using information provided by the SegmentList element\n * SegmentList (DASH SPEC Section 5.3.9.3.2) contains a set of <SegmentURL> nodes.  Each\n * node should be translated into segment.\n *\n * @param {Object} attributes\n *   Object containing all inherited attributes from parent elements with attribute\n *   names as keys\n * @param {Object[]|undefined} segmentTimeline\n *        List of objects representing the attributes of each S element contained within\n *        the SegmentTimeline element\n * @return {Object.<Array>} list of segments\n */\n\n\nvar segmentsFromList = function segmentsFromList(attributes, segmentTimeline) {\n  var duration = attributes.duration,\n      _attributes$segmentUr = attributes.segmentUrls,\n      segmentUrls = _attributes$segmentUr === void 0 ? [] : _attributes$segmentUr; // Per spec (5.3.9.2.1) no way to determine segment duration OR\n  // if both SegmentTimeline and @duration are defined, it is outside of spec.\n\n  if (!duration && !segmentTimeline || duration && segmentTimeline) {\n    throw new Error(errors.SEGMENT_TIME_UNSPECIFIED);\n  }\n\n  var segmentUrlMap = segmentUrls.map(function (segmentUrlObject) {\n    return SegmentURLToSegmentObject(attributes, segmentUrlObject);\n  });\n  var segmentTimeInfo;\n\n  if (duration) {\n    segmentTimeInfo = parseByDuration(attributes);\n  }\n\n  if (segmentTimeline) {\n    segmentTimeInfo = parseByTimeline(attributes, segmentTimeline);\n  }\n\n  var segments = segmentTimeInfo.map(function (segmentTime, index) {\n    if (segmentUrlMap[index]) {\n      var segment = segmentUrlMap[index];\n      segment.timeline = segmentTime.timeline;\n      segment.duration = segmentTime.duration;\n      segment.number = segmentTime.number;\n      return segment;\n    } // Since we're mapping we should get rid of any blank segments (in case\n    // the given SegmentTimeline is handling for more elements than we have\n    // SegmentURLs for).\n\n  }).filter(function (segment) {\n    return segment;\n  });\n  return segments;\n};\n\nvar generateSegments = function generateSegments(_ref) {\n  var attributes = _ref.attributes,\n      segmentInfo = _ref.segmentInfo;\n  var segmentAttributes;\n  var segmentsFn;\n\n  if (segmentInfo.template) {\n    segmentsFn = segmentsFromTemplate;\n    segmentAttributes = merge(attributes, segmentInfo.template);\n  } else if (segmentInfo.base) {\n    segmentsFn = segmentsFromBase;\n    segmentAttributes = merge(attributes, segmentInfo.base);\n  } else if (segmentInfo.list) {\n    segmentsFn = segmentsFromList;\n    segmentAttributes = merge(attributes, segmentInfo.list);\n  }\n\n  var segmentsInfo = {\n    attributes: attributes\n  };\n\n  if (!segmentsFn) {\n    return segmentsInfo;\n  }\n\n  var segments = segmentsFn(segmentAttributes, segmentInfo.timeline); // The @duration attribute will be used to determin the playlist's targetDuration which\n  // must be in seconds. Since we've generated the segment list, we no longer need\n  // @duration to be in @timescale units, so we can convert it here.\n\n  if (segmentAttributes.duration) {\n    var _segmentAttributes = segmentAttributes,\n        duration = _segmentAttributes.duration,\n        _segmentAttributes$ti = _segmentAttributes.timescale,\n        timescale = _segmentAttributes$ti === void 0 ? 1 : _segmentAttributes$ti;\n    segmentAttributes.duration = duration / timescale;\n  } else if (segments.length) {\n    // if there is no @duration attribute, use the largest segment duration as\n    // as target duration\n    segmentAttributes.duration = segments.reduce(function (max, segment) {\n      return Math.max(max, Math.ceil(segment.duration));\n    }, 0);\n  } else {\n    segmentAttributes.duration = 0;\n  }\n\n  segmentsInfo.attributes = segmentAttributes;\n  segmentsInfo.segments = segments; // This is a sidx box without actual segment information\n\n  if (segmentInfo.base && segmentAttributes.indexRange) {\n    segmentsInfo.sidx = segments[0];\n    segmentsInfo.segments = [];\n  }\n\n  return segmentsInfo;\n};\n\nvar toPlaylists = function toPlaylists(representations) {\n  return representations.map(generateSegments);\n};\n\nvar findChildren = function findChildren(element, name) {\n  return from(element.childNodes).filter(function (_ref) {\n    var tagName = _ref.tagName;\n    return tagName === name;\n  });\n};\n\nvar getContent = function getContent(element) {\n  return element.textContent.trim();\n};\n\nvar parseDuration = function parseDuration(str) {\n  var SECONDS_IN_YEAR = 365 * 24 * 60 * 60;\n  var SECONDS_IN_MONTH = 30 * 24 * 60 * 60;\n  var SECONDS_IN_DAY = 24 * 60 * 60;\n  var SECONDS_IN_HOUR = 60 * 60;\n  var SECONDS_IN_MIN = 60; // P10Y10M10DT10H10M10.1S\n\n  var durationRegex = /P(?:(\\d*)Y)?(?:(\\d*)M)?(?:(\\d*)D)?(?:T(?:(\\d*)H)?(?:(\\d*)M)?(?:([\\d.]*)S)?)?/;\n  var match = durationRegex.exec(str);\n\n  if (!match) {\n    return 0;\n  }\n\n  var _match$slice = match.slice(1),\n      year = _match$slice[0],\n      month = _match$slice[1],\n      day = _match$slice[2],\n      hour = _match$slice[3],\n      minute = _match$slice[4],\n      second = _match$slice[5];\n\n  return parseFloat(year || 0) * SECONDS_IN_YEAR + parseFloat(month || 0) * SECONDS_IN_MONTH + parseFloat(day || 0) * SECONDS_IN_DAY + parseFloat(hour || 0) * SECONDS_IN_HOUR + parseFloat(minute || 0) * SECONDS_IN_MIN + parseFloat(second || 0);\n};\n\nvar parseDate = function parseDate(str) {\n  // Date format without timezone according to ISO 8601\n  // YYY-MM-DDThh:mm:ss.ssssss\n  var dateRegex = /^\\d+-\\d+-\\d+T\\d+:\\d+:\\d+(\\.\\d+)?$/; // If the date string does not specifiy a timezone, we must specifiy UTC. This is\n  // expressed by ending with 'Z'\n\n  if (dateRegex.test(str)) {\n    str += 'Z';\n  }\n\n  return Date.parse(str);\n};\n\nvar parsers = {\n  /**\n   * Specifies the duration of the entire Media Presentation. Format is a duration string\n   * as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The duration in seconds\n   */\n  mediaPresentationDuration: function mediaPresentationDuration(value) {\n    return parseDuration(value);\n  },\n\n  /**\n   * Specifies the Segment availability start time for all Segments referred to in this\n   * MPD. For a dynamic manifest, it specifies the anchor for the earliest availability\n   * time. Format is a date string as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The date as seconds from unix epoch\n   */\n  availabilityStartTime: function availabilityStartTime(value) {\n    return parseDate(value) / 1000;\n  },\n\n  /**\n   * Specifies the smallest period between potential changes to the MPD. Format is a\n   * duration string as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The duration in seconds\n   */\n  minimumUpdatePeriod: function minimumUpdatePeriod(value) {\n    return parseDuration(value);\n  },\n\n  /**\n   * Specifies the duration of the smallest time shifting buffer for any Representation\n   * in the MPD. Format is a duration string as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The duration in seconds\n   */\n  timeShiftBufferDepth: function timeShiftBufferDepth(value) {\n    return parseDuration(value);\n  },\n\n  /**\n   * Specifies the PeriodStart time of the Period relative to the availabilityStarttime.\n   * Format is a duration string as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The duration in seconds\n   */\n  start: function start(value) {\n    return parseDuration(value);\n  },\n\n  /**\n   * Specifies the width of the visual presentation\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed width\n   */\n  width: function width(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the height of the visual presentation\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed height\n   */\n  height: function height(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the bitrate of the representation\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed bandwidth\n   */\n  bandwidth: function bandwidth(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the number of the first Media Segment in this Representation in the Period\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed number\n   */\n  startNumber: function startNumber(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the timescale in units per seconds\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The aprsed timescale\n   */\n  timescale: function timescale(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the constant approximate Segment duration\n   * NOTE: The <Period> element also contains an @duration attribute. This duration\n   *       specifies the duration of the Period. This attribute is currently not\n   *       supported by the rest of the parser, however we still check for it to prevent\n   *       errors.\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed duration\n   */\n  duration: function duration(value) {\n    var parsedValue = parseInt(value, 10);\n\n    if (isNaN(parsedValue)) {\n      return parseDuration(value);\n    }\n\n    return parsedValue;\n  },\n\n  /**\n   * Specifies the Segment duration, in units of the value of the @timescale.\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed duration\n   */\n  d: function d(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the MPD start time, in @timescale units, the first Segment in the series\n   * starts relative to the beginning of the Period\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed time\n   */\n  t: function t(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the repeat count of the number of following contiguous Segments with the\n   * same duration expressed by the value of @d\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed number\n   */\n  r: function r(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Default parser for all other attributes. Acts as a no-op and just returns the value\n   * as a string\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {string}\n   *         Unparsed value\n   */\n  DEFAULT: function DEFAULT(value) {\n    return value;\n  }\n};\n/**\n * Gets all the attributes and values of the provided node, parses attributes with known\n * types, and returns an object with attribute names mapped to values.\n *\n * @param {Node} el\n *        The node to parse attributes from\n * @return {Object}\n *         Object with all attributes of el parsed\n */\n\nvar parseAttributes = function parseAttributes(el) {\n  if (!(el && el.attributes)) {\n    return {};\n  }\n\n  return from(el.attributes).reduce(function (a, e) {\n    var parseFn = parsers[e.name] || parsers.DEFAULT;\n    a[e.name] = parseFn(e.value);\n    return a;\n  }, {});\n};\n\nfunction decodeB64ToUint8Array(b64Text) {\n  var decodedString = window$1.atob(b64Text);\n  var array = new Uint8Array(decodedString.length);\n\n  for (var i = 0; i < decodedString.length; i++) {\n    array[i] = decodedString.charCodeAt(i);\n  }\n\n  return array;\n}\n\nvar keySystemsMap = {\n  'urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b': 'org.w3.clearkey',\n  'urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed': 'com.widevine.alpha',\n  'urn:uuid:9a04f079-9840-4286-ab92-e65be0885f95': 'com.microsoft.playready',\n  'urn:uuid:f239e769-efa3-4850-9c16-a903c6932efb': 'com.adobe.primetime'\n};\n/**\n * Builds a list of urls that is the product of the reference urls and BaseURL values\n *\n * @param {string[]} referenceUrls\n *        List of reference urls to resolve to\n * @param {Node[]} baseUrlElements\n *        List of BaseURL nodes from the mpd\n * @return {string[]}\n *         List of resolved urls\n */\n\nvar buildBaseUrls = function buildBaseUrls(referenceUrls, baseUrlElements) {\n  if (!baseUrlElements.length) {\n    return referenceUrls;\n  }\n\n  return flatten(referenceUrls.map(function (reference) {\n    return baseUrlElements.map(function (baseUrlElement) {\n      return resolveUrl(reference, getContent(baseUrlElement));\n    });\n  }));\n};\n/**\n * Contains all Segment information for its containing AdaptationSet\n *\n * @typedef {Object} SegmentInformation\n * @property {Object|undefined} template\n *           Contains the attributes for the SegmentTemplate node\n * @property {Object[]|undefined} timeline\n *           Contains a list of atrributes for each S node within the SegmentTimeline node\n * @property {Object|undefined} list\n *           Contains the attributes for the SegmentList node\n * @property {Object|undefined} base\n *           Contains the attributes for the SegmentBase node\n */\n\n/**\n * Returns all available Segment information contained within the AdaptationSet node\n *\n * @param {Node} adaptationSet\n *        The AdaptationSet node to get Segment information from\n * @return {SegmentInformation}\n *         The Segment information contained within the provided AdaptationSet\n */\n\n\nvar getSegmentInformation = function getSegmentInformation(adaptationSet) {\n  var segmentTemplate = findChildren(adaptationSet, 'SegmentTemplate')[0];\n  var segmentList = findChildren(adaptationSet, 'SegmentList')[0];\n  var segmentUrls = segmentList && findChildren(segmentList, 'SegmentURL').map(function (s) {\n    return merge({\n      tag: 'SegmentURL'\n    }, parseAttributes(s));\n  });\n  var segmentBase = findChildren(adaptationSet, 'SegmentBase')[0];\n  var segmentTimelineParentNode = segmentList || segmentTemplate;\n  var segmentTimeline = segmentTimelineParentNode && findChildren(segmentTimelineParentNode, 'SegmentTimeline')[0];\n  var segmentInitializationParentNode = segmentList || segmentBase || segmentTemplate;\n  var segmentInitialization = segmentInitializationParentNode && findChildren(segmentInitializationParentNode, 'Initialization')[0]; // SegmentTemplate is handled slightly differently, since it can have both\n  // @initialization and an <Initialization> node.  @initialization can be templated,\n  // while the node can have a url and range specified.  If the <SegmentTemplate> has\n  // both @initialization and an <Initialization> subelement we opt to override with\n  // the node, as this interaction is not defined in the spec.\n\n  var template = segmentTemplate && parseAttributes(segmentTemplate);\n\n  if (template && segmentInitialization) {\n    template.initialization = segmentInitialization && parseAttributes(segmentInitialization);\n  } else if (template && template.initialization) {\n    // If it is @initialization we convert it to an object since this is the format that\n    // later functions will rely on for the initialization segment.  This is only valid\n    // for <SegmentTemplate>\n    template.initialization = {\n      sourceURL: template.initialization\n    };\n  }\n\n  var segmentInfo = {\n    template: template,\n    timeline: segmentTimeline && findChildren(segmentTimeline, 'S').map(function (s) {\n      return parseAttributes(s);\n    }),\n    list: segmentList && merge(parseAttributes(segmentList), {\n      segmentUrls: segmentUrls,\n      initialization: parseAttributes(segmentInitialization)\n    }),\n    base: segmentBase && merge(parseAttributes(segmentBase), {\n      initialization: parseAttributes(segmentInitialization)\n    })\n  };\n  Object.keys(segmentInfo).forEach(function (key) {\n    if (!segmentInfo[key]) {\n      delete segmentInfo[key];\n    }\n  });\n  return segmentInfo;\n};\n/**\n * Contains Segment information and attributes needed to construct a Playlist object\n * from a Representation\n *\n * @typedef {Object} RepresentationInformation\n * @property {SegmentInformation} segmentInfo\n *           Segment information for this Representation\n * @property {Object} attributes\n *           Inherited attributes for this Representation\n */\n\n/**\n * Maps a Representation node to an object containing Segment information and attributes\n *\n * @name inheritBaseUrlsCallback\n * @function\n * @param {Node} representation\n *        Representation node from the mpd\n * @return {RepresentationInformation}\n *         Representation information needed to construct a Playlist object\n */\n\n/**\n * Returns a callback for Array.prototype.map for mapping Representation nodes to\n * Segment information and attributes using inherited BaseURL nodes.\n *\n * @param {Object} adaptationSetAttributes\n *        Contains attributes inherited by the AdaptationSet\n * @param {string[]} adaptationSetBaseUrls\n *        Contains list of resolved base urls inherited by the AdaptationSet\n * @param {SegmentInformation} adaptationSetSegmentInfo\n *        Contains Segment information for the AdaptationSet\n * @return {inheritBaseUrlsCallback}\n *         Callback map function\n */\n\n\nvar inheritBaseUrls = function inheritBaseUrls(adaptationSetAttributes, adaptationSetBaseUrls, adaptationSetSegmentInfo) {\n  return function (representation) {\n    var repBaseUrlElements = findChildren(representation, 'BaseURL');\n    var repBaseUrls = buildBaseUrls(adaptationSetBaseUrls, repBaseUrlElements);\n    var attributes = merge(adaptationSetAttributes, parseAttributes(representation));\n    var representationSegmentInfo = getSegmentInformation(representation);\n    return repBaseUrls.map(function (baseUrl) {\n      return {\n        segmentInfo: merge(adaptationSetSegmentInfo, representationSegmentInfo),\n        attributes: merge(attributes, {\n          baseUrl: baseUrl\n        })\n      };\n    });\n  };\n};\n/**\n * Tranforms a series of content protection nodes to\n * an object containing pssh data by key system\n *\n * @param {Node[]} contentProtectionNodes\n *        Content protection nodes\n * @return {Object}\n *        Object containing pssh data by key system\n */\n\n\nvar generateKeySystemInformation = function generateKeySystemInformation(contentProtectionNodes) {\n  return contentProtectionNodes.reduce(function (acc, node) {\n    var attributes = parseAttributes(node);\n    var keySystem = keySystemsMap[attributes.schemeIdUri];\n\n    if (keySystem) {\n      acc[keySystem] = {\n        attributes: attributes\n      };\n      var psshNode = findChildren(node, 'cenc:pssh')[0];\n\n      if (psshNode) {\n        var pssh = getContent(psshNode);\n        var psshBuffer = pssh && decodeB64ToUint8Array(pssh);\n        acc[keySystem].pssh = psshBuffer;\n      }\n    }\n\n    return acc;\n  }, {});\n};\n/**\n * Maps an AdaptationSet node to a list of Representation information objects\n *\n * @name toRepresentationsCallback\n * @function\n * @param {Node} adaptationSet\n *        AdaptationSet node from the mpd\n * @return {RepresentationInformation[]}\n *         List of objects containing Representaion information\n */\n\n/**\n * Returns a callback for Array.prototype.map for mapping AdaptationSet nodes to a list of\n * Representation information objects\n *\n * @param {Object} periodAttributes\n *        Contains attributes inherited by the Period\n * @param {string[]} periodBaseUrls\n *        Contains list of resolved base urls inherited by the Period\n * @param {string[]} periodSegmentInfo\n *        Contains Segment Information at the period level\n * @return {toRepresentationsCallback}\n *         Callback map function\n */\n\n\nvar toRepresentations = function toRepresentations(periodAttributes, periodBaseUrls, periodSegmentInfo) {\n  return function (adaptationSet) {\n    var adaptationSetAttributes = parseAttributes(adaptationSet);\n    var adaptationSetBaseUrls = buildBaseUrls(periodBaseUrls, findChildren(adaptationSet, 'BaseURL'));\n    var role = findChildren(adaptationSet, 'Role')[0];\n    var roleAttributes = {\n      role: parseAttributes(role)\n    };\n    var attrs = merge(periodAttributes, adaptationSetAttributes, roleAttributes);\n    var contentProtection = generateKeySystemInformation(findChildren(adaptationSet, 'ContentProtection'));\n\n    if (Object.keys(contentProtection).length) {\n      attrs = merge(attrs, {\n        contentProtection: contentProtection\n      });\n    }\n\n    var segmentInfo = getSegmentInformation(adaptationSet);\n    var representations = findChildren(adaptationSet, 'Representation');\n    var adaptationSetSegmentInfo = merge(periodSegmentInfo, segmentInfo);\n    return flatten(representations.map(inheritBaseUrls(attrs, adaptationSetBaseUrls, adaptationSetSegmentInfo)));\n  };\n};\n/**\n * Maps an Period node to a list of Representation inforamtion objects for all\n * AdaptationSet nodes contained within the Period\n *\n * @name toAdaptationSetsCallback\n * @function\n * @param {Node} period\n *        Period node from the mpd\n * @param {number} periodIndex\n *        Index of the Period within the mpd\n * @return {RepresentationInformation[]}\n *         List of objects containing Representaion information\n */\n\n/**\n * Returns a callback for Array.prototype.map for mapping Period nodes to a list of\n * Representation information objects\n *\n * @param {Object} mpdAttributes\n *        Contains attributes inherited by the mpd\n * @param {string[]} mpdBaseUrls\n *        Contains list of resolved base urls inherited by the mpd\n * @return {toAdaptationSetsCallback}\n *         Callback map function\n */\n\n\nvar toAdaptationSets = function toAdaptationSets(mpdAttributes, mpdBaseUrls) {\n  return function (period, index) {\n    var periodBaseUrls = buildBaseUrls(mpdBaseUrls, findChildren(period, 'BaseURL'));\n    var periodAtt = parseAttributes(period);\n    var parsedPeriodId = parseInt(periodAtt.id, 10); // fallback to mapping index if Period@id is not a number\n\n    var periodIndex = window$1.isNaN(parsedPeriodId) ? index : parsedPeriodId;\n    var periodAttributes = merge(mpdAttributes, {\n      periodIndex: periodIndex\n    });\n    var adaptationSets = findChildren(period, 'AdaptationSet');\n    var periodSegmentInfo = getSegmentInformation(period);\n    return flatten(adaptationSets.map(toRepresentations(periodAttributes, periodBaseUrls, periodSegmentInfo)));\n  };\n};\n/**\n * Traverses the mpd xml tree to generate a list of Representation information objects\n * that have inherited attributes from parent nodes\n *\n * @param {Node} mpd\n *        The root node of the mpd\n * @param {Object} options\n *        Available options for inheritAttributes\n * @param {string} options.manifestUri\n *        The uri source of the mpd\n * @param {number} options.NOW\n *        Current time per DASH IOP.  Default is current time in ms since epoch\n * @param {number} options.clientOffset\n *        Client time difference from NOW (in milliseconds)\n * @return {RepresentationInformation[]}\n *         List of objects containing Representation information\n */\n\n\nvar inheritAttributes = function inheritAttributes(mpd, options) {\n  if (options === void 0) {\n    options = {};\n  }\n\n  var _options = options,\n      _options$manifestUri = _options.manifestUri,\n      manifestUri = _options$manifestUri === void 0 ? '' : _options$manifestUri,\n      _options$NOW = _options.NOW,\n      NOW = _options$NOW === void 0 ? Date.now() : _options$NOW,\n      _options$clientOffset = _options.clientOffset,\n      clientOffset = _options$clientOffset === void 0 ? 0 : _options$clientOffset;\n  var periods = findChildren(mpd, 'Period');\n\n  if (!periods.length) {\n    throw new Error(errors.INVALID_NUMBER_OF_PERIOD);\n  }\n\n  var mpdAttributes = parseAttributes(mpd);\n  var mpdBaseUrls = buildBaseUrls([manifestUri], findChildren(mpd, 'BaseURL'));\n  mpdAttributes.sourceDuration = mpdAttributes.mediaPresentationDuration || 0;\n  mpdAttributes.NOW = NOW;\n  mpdAttributes.clientOffset = clientOffset;\n  return flatten(periods.map(toAdaptationSets(mpdAttributes, mpdBaseUrls)));\n};\n\nvar stringToMpdXml = function stringToMpdXml(manifestString) {\n  if (manifestString === '') {\n    throw new Error(errors.DASH_EMPTY_MANIFEST);\n  }\n\n  var parser = new window$1.DOMParser();\n  var xml = parser.parseFromString(manifestString, 'application/xml');\n  var mpd = xml && xml.documentElement.tagName === 'MPD' ? xml.documentElement : null;\n\n  if (!mpd || mpd && mpd.getElementsByTagName('parsererror').length > 0) {\n    throw new Error(errors.DASH_INVALID_XML);\n  }\n\n  return mpd;\n};\n/**\n * Parses the manifest for a UTCTiming node, returning the nodes attributes if found\n *\n * @param {string} mpd\n *        XML string of the MPD manifest\n * @return {Object|null}\n *         Attributes of UTCTiming node specified in the manifest. Null if none found\n */\n\n\nvar parseUTCTimingScheme = function parseUTCTimingScheme(mpd) {\n  var UTCTimingNode = findChildren(mpd, 'UTCTiming')[0];\n\n  if (!UTCTimingNode) {\n    return null;\n  }\n\n  var attributes = parseAttributes(UTCTimingNode);\n\n  switch (attributes.schemeIdUri) {\n    case 'urn:mpeg:dash:utc:http-head:2014':\n    case 'urn:mpeg:dash:utc:http-head:2012':\n      attributes.method = 'HEAD';\n      break;\n\n    case 'urn:mpeg:dash:utc:http-xsdate:2014':\n    case 'urn:mpeg:dash:utc:http-iso:2014':\n    case 'urn:mpeg:dash:utc:http-xsdate:2012':\n    case 'urn:mpeg:dash:utc:http-iso:2012':\n      attributes.method = 'GET';\n      break;\n\n    case 'urn:mpeg:dash:utc:direct:2014':\n    case 'urn:mpeg:dash:utc:direct:2012':\n      attributes.method = 'DIRECT';\n      attributes.value = Date.parse(attributes.value);\n      break;\n\n    case 'urn:mpeg:dash:utc:http-ntp:2014':\n    case 'urn:mpeg:dash:utc:ntp:2014':\n    case 'urn:mpeg:dash:utc:sntp:2014':\n    default:\n      throw new Error(errors.UNSUPPORTED_UTC_TIMING_SCHEME);\n  }\n\n  return attributes;\n};\n\nvar VERSION = version;\n\nvar parse = function parse(manifestString, options) {\n  if (options === void 0) {\n    options = {};\n  }\n\n  return toM3u8(toPlaylists(inheritAttributes(stringToMpdXml(manifestString), options)), options.sidxMapping);\n};\n/**\n * Parses the manifest for a UTCTiming node, returning the nodes attributes if found\n *\n * @param {string} manifestString\n *        XML string of the MPD manifest\n * @return {Object|null}\n *         Attributes of UTCTiming node specified in the manifest. Null if none found\n */\n\n\nvar parseUTCTiming = function parseUTCTiming(manifestString) {\n  return parseUTCTimingScheme(stringToMpdXml(manifestString));\n};\n\nexport { VERSION, parse, parseUTCTiming };","/**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Reads in-band CEA-708 captions out of FMP4 segments.\n * @see https://en.wikipedia.org/wiki/CEA-708\n */\n'use strict';\n\nvar discardEmulationPreventionBytes = require('../tools/caption-packet-parser').discardEmulationPreventionBytes;\n\nvar CaptionStream = require('../m2ts/caption-stream').CaptionStream;\n\nvar probe = require('./probe');\n\nvar inspect = require('../tools/mp4-inspector');\n/**\n  * Maps an offset in the mdat to a sample based on the the size of the samples.\n  * Assumes that `parseSamples` has been called first.\n  *\n  * @param {Number} offset - The offset into the mdat\n  * @param {Object[]} samples - An array of samples, parsed using `parseSamples`\n  * @return {?Object} The matching sample, or null if no match was found.\n  *\n  * @see ISO-BMFF-12/2015, Section 8.8.8\n **/\n\n\nvar mapToSample = function mapToSample(offset, samples) {\n  var approximateOffset = offset;\n\n  for (var i = 0; i < samples.length; i++) {\n    var sample = samples[i];\n\n    if (approximateOffset < sample.size) {\n      return sample;\n    }\n\n    approximateOffset -= sample.size;\n  }\n\n  return null;\n};\n/**\n  * Finds SEI nal units contained in a Media Data Box.\n  * Assumes that `parseSamples` has been called first.\n  *\n  * @param {Uint8Array} avcStream - The bytes of the mdat\n  * @param {Object[]} samples - The samples parsed out by `parseSamples`\n  * @param {Number} trackId - The trackId of this video track\n  * @return {Object[]} seiNals - the parsed SEI NALUs found.\n  *   The contents of the seiNal should match what is expected by\n  *   CaptionStream.push (nalUnitType, size, data, escapedRBSP, pts, dts)\n  *\n  * @see ISO-BMFF-12/2015, Section 8.1.1\n  * @see Rec. ITU-T H.264, 7.3.2.3.1\n **/\n\n\nvar findSeiNals = function findSeiNals(avcStream, samples, trackId) {\n  var avcView = new DataView(avcStream.buffer, avcStream.byteOffset, avcStream.byteLength),\n      result = [],\n      seiNal,\n      i,\n      length,\n      lastMatchedSample;\n\n  for (i = 0; i + 4 < avcStream.length; i += length) {\n    length = avcView.getUint32(i);\n    i += 4; // Bail if this doesn't appear to be an H264 stream\n\n    if (length <= 0) {\n      continue;\n    }\n\n    switch (avcStream[i] & 0x1F) {\n      case 0x06:\n        var data = avcStream.subarray(i + 1, i + 1 + length);\n        var matchingSample = mapToSample(i, samples);\n        seiNal = {\n          nalUnitType: 'sei_rbsp',\n          size: length,\n          data: data,\n          escapedRBSP: discardEmulationPreventionBytes(data),\n          trackId: trackId\n        };\n\n        if (matchingSample) {\n          seiNal.pts = matchingSample.pts;\n          seiNal.dts = matchingSample.dts;\n          lastMatchedSample = matchingSample;\n        } else {\n          // If a matching sample cannot be found, use the last\n          // sample's values as they should be as close as possible\n          seiNal.pts = lastMatchedSample.pts;\n          seiNal.dts = lastMatchedSample.dts;\n        }\n\n        result.push(seiNal);\n        break;\n\n      default:\n        break;\n    }\n  }\n\n  return result;\n};\n/**\n  * Parses sample information out of Track Run Boxes and calculates\n  * the absolute presentation and decode timestamps of each sample.\n  *\n  * @param {Array<Uint8Array>} truns - The Trun Run boxes to be parsed\n  * @param {Number} baseMediaDecodeTime - base media decode time from tfdt\n      @see ISO-BMFF-12/2015, Section 8.8.12\n  * @param {Object} tfhd - The parsed Track Fragment Header\n  *   @see inspect.parseTfhd\n  * @return {Object[]} the parsed samples\n  *\n  * @see ISO-BMFF-12/2015, Section 8.8.8\n **/\n\n\nvar parseSamples = function parseSamples(truns, baseMediaDecodeTime, tfhd) {\n  var currentDts = baseMediaDecodeTime;\n  var defaultSampleDuration = tfhd.defaultSampleDuration || 0;\n  var defaultSampleSize = tfhd.defaultSampleSize || 0;\n  var trackId = tfhd.trackId;\n  var allSamples = [];\n  truns.forEach(function (trun) {\n    // Note: We currently do not parse the sample table as well\n    // as the trun. It's possible some sources will require this.\n    // moov > trak > mdia > minf > stbl\n    var trackRun = inspect.parseTrun(trun);\n    var samples = trackRun.samples;\n    samples.forEach(function (sample) {\n      if (sample.duration === undefined) {\n        sample.duration = defaultSampleDuration;\n      }\n\n      if (sample.size === undefined) {\n        sample.size = defaultSampleSize;\n      }\n\n      sample.trackId = trackId;\n      sample.dts = currentDts;\n\n      if (sample.compositionTimeOffset === undefined) {\n        sample.compositionTimeOffset = 0;\n      }\n\n      sample.pts = currentDts + sample.compositionTimeOffset;\n      currentDts += sample.duration;\n    });\n    allSamples = allSamples.concat(samples);\n  });\n  return allSamples;\n};\n/**\n  * Parses out caption nals from an FMP4 segment's video tracks.\n  *\n  * @param {Uint8Array} segment - The bytes of a single segment\n  * @param {Number} videoTrackId - The trackId of a video track in the segment\n  * @return {Object.<Number, Object[]>} A mapping of video trackId to\n  *   a list of seiNals found in that track\n **/\n\n\nvar parseCaptionNals = function parseCaptionNals(segment, videoTrackId) {\n  // To get the samples\n  var trafs = probe.findBox(segment, ['moof', 'traf']); // To get SEI NAL units\n\n  var mdats = probe.findBox(segment, ['mdat']);\n  var captionNals = {};\n  var mdatTrafPairs = []; // Pair up each traf with a mdat as moofs and mdats are in pairs\n\n  mdats.forEach(function (mdat, index) {\n    var matchingTraf = trafs[index];\n    mdatTrafPairs.push({\n      mdat: mdat,\n      traf: matchingTraf\n    });\n  });\n  mdatTrafPairs.forEach(function (pair) {\n    var mdat = pair.mdat;\n    var traf = pair.traf;\n    var tfhd = probe.findBox(traf, ['tfhd']); // Exactly 1 tfhd per traf\n\n    var headerInfo = inspect.parseTfhd(tfhd[0]);\n    var trackId = headerInfo.trackId;\n    var tfdt = probe.findBox(traf, ['tfdt']); // Either 0 or 1 tfdt per traf\n\n    var baseMediaDecodeTime = tfdt.length > 0 ? inspect.parseTfdt(tfdt[0]).baseMediaDecodeTime : 0;\n    var truns = probe.findBox(traf, ['trun']);\n    var samples;\n    var seiNals; // Only parse video data for the chosen video track\n\n    if (videoTrackId === trackId && truns.length > 0) {\n      samples = parseSamples(truns, baseMediaDecodeTime, headerInfo);\n      seiNals = findSeiNals(mdat, samples, trackId);\n\n      if (!captionNals[trackId]) {\n        captionNals[trackId] = [];\n      }\n\n      captionNals[trackId] = captionNals[trackId].concat(seiNals);\n    }\n  });\n  return captionNals;\n};\n/**\n  * Parses out inband captions from an MP4 container and returns\n  * caption objects that can be used by WebVTT and the TextTrack API.\n  * @see https://developer.mozilla.org/en-US/docs/Web/API/VTTCue\n  * @see https://developer.mozilla.org/en-US/docs/Web/API/TextTrack\n  * Assumes that `probe.getVideoTrackIds` and `probe.timescale` have been called first\n  *\n  * @param {Uint8Array} segment - The fmp4 segment containing embedded captions\n  * @param {Number} trackId - The id of the video track to parse\n  * @param {Number} timescale - The timescale for the video track from the init segment\n  *\n  * @return {?Object[]} parsedCaptions - A list of captions or null if no video tracks\n  * @return {Number} parsedCaptions[].startTime - The time to show the caption in seconds\n  * @return {Number} parsedCaptions[].endTime - The time to stop showing the caption in seconds\n  * @return {String} parsedCaptions[].text - The visible content of the caption\n **/\n\n\nvar parseEmbeddedCaptions = function parseEmbeddedCaptions(segment, trackId, timescale) {\n  var seiNals; // the ISO-BMFF spec says that trackId can't be zero, but there's some broken content out there\n\n  if (trackId === null) {\n    return null;\n  }\n\n  seiNals = parseCaptionNals(segment, trackId);\n  return {\n    seiNals: seiNals[trackId],\n    timescale: timescale\n  };\n};\n/**\n  * Converts SEI NALUs into captions that can be used by video.js\n **/\n\n\nvar CaptionParser = function CaptionParser() {\n  var isInitialized = false;\n  var captionStream; // Stores segments seen before trackId and timescale are set\n\n  var segmentCache; // Stores video track ID of the track being parsed\n\n  var trackId; // Stores the timescale of the track being parsed\n\n  var timescale; // Stores captions parsed so far\n\n  var parsedCaptions; // Stores whether we are receiving partial data or not\n\n  var parsingPartial;\n  /**\n    * A method to indicate whether a CaptionParser has been initalized\n    * @returns {Boolean}\n   **/\n\n  this.isInitialized = function () {\n    return isInitialized;\n  };\n  /**\n    * Initializes the underlying CaptionStream, SEI NAL parsing\n    * and management, and caption collection\n   **/\n\n\n  this.init = function (options) {\n    captionStream = new CaptionStream();\n    isInitialized = true;\n    parsingPartial = options ? options.isPartial : false; // Collect dispatched captions\n\n    captionStream.on('data', function (event) {\n      // Convert to seconds in the source's timescale\n      event.startTime = event.startPts / timescale;\n      event.endTime = event.endPts / timescale;\n      parsedCaptions.captions.push(event);\n      parsedCaptions.captionStreams[event.stream] = true;\n    });\n  };\n  /**\n    * Determines if a new video track will be selected\n    * or if the timescale changed\n    * @return {Boolean}\n   **/\n\n\n  this.isNewInit = function (videoTrackIds, timescales) {\n    if (videoTrackIds && videoTrackIds.length === 0 || timescales && typeof timescales === 'object' && Object.keys(timescales).length === 0) {\n      return false;\n    }\n\n    return trackId !== videoTrackIds[0] || timescale !== timescales[trackId];\n  };\n  /**\n    * Parses out SEI captions and interacts with underlying\n    * CaptionStream to return dispatched captions\n    *\n    * @param {Uint8Array} segment - The fmp4 segment containing embedded captions\n    * @param {Number[]} videoTrackIds - A list of video tracks found in the init segment\n    * @param {Object.<Number, Number>} timescales - The timescales found in the init segment\n    * @see parseEmbeddedCaptions\n    * @see m2ts/caption-stream.js\n   **/\n\n\n  this.parse = function (segment, videoTrackIds, timescales) {\n    var parsedData;\n\n    if (!this.isInitialized()) {\n      return null; // This is not likely to be a video segment\n    } else if (!videoTrackIds || !timescales) {\n      return null;\n    } else if (this.isNewInit(videoTrackIds, timescales)) {\n      // Use the first video track only as there is no\n      // mechanism to switch to other video tracks\n      trackId = videoTrackIds[0];\n      timescale = timescales[trackId]; // If an init segment has not been seen yet, hold onto segment\n      // data until we have one.\n      // the ISO-BMFF spec says that trackId can't be zero, but there's some broken content out there\n    } else if (trackId === null || !timescale) {\n      segmentCache.push(segment);\n      return null;\n    } // Now that a timescale and trackId is set, parse cached segments\n\n\n    while (segmentCache.length > 0) {\n      var cachedSegment = segmentCache.shift();\n      this.parse(cachedSegment, videoTrackIds, timescales);\n    }\n\n    parsedData = parseEmbeddedCaptions(segment, trackId, timescale);\n\n    if (parsedData === null || !parsedData.seiNals) {\n      return null;\n    }\n\n    this.pushNals(parsedData.seiNals); // Force the parsed captions to be dispatched\n\n    this.flushStream();\n    return parsedCaptions;\n  };\n  /**\n    * Pushes SEI NALUs onto CaptionStream\n    * @param {Object[]} nals - A list of SEI nals parsed using `parseCaptionNals`\n    * Assumes that `parseCaptionNals` has been called first\n    * @see m2ts/caption-stream.js\n    **/\n\n\n  this.pushNals = function (nals) {\n    if (!this.isInitialized() || !nals || nals.length === 0) {\n      return null;\n    }\n\n    nals.forEach(function (nal) {\n      captionStream.push(nal);\n    });\n  };\n  /**\n    * Flushes underlying CaptionStream to dispatch processed, displayable captions\n    * @see m2ts/caption-stream.js\n   **/\n\n\n  this.flushStream = function () {\n    if (!this.isInitialized()) {\n      return null;\n    }\n\n    if (!parsingPartial) {\n      captionStream.flush();\n    } else {\n      captionStream.partialFlush();\n    }\n  };\n  /**\n    * Reset caption buckets for new data\n   **/\n\n\n  this.clearParsedCaptions = function () {\n    parsedCaptions.captions = [];\n    parsedCaptions.captionStreams = {};\n  };\n  /**\n    * Resets underlying CaptionStream\n    * @see m2ts/caption-stream.js\n   **/\n\n\n  this.resetCaptionStream = function () {\n    if (!this.isInitialized()) {\n      return null;\n    }\n\n    captionStream.reset();\n  };\n  /**\n    * Convenience method to clear all captions flushed from the\n    * CaptionStream and still being parsed\n    * @see m2ts/caption-stream.js\n   **/\n\n\n  this.clearAllCaptions = function () {\n    this.clearParsedCaptions();\n    this.resetCaptionStream();\n  };\n  /**\n    * Reset caption parser\n   **/\n\n\n  this.reset = function () {\n    segmentCache = [];\n    trackId = null;\n    timescale = null;\n\n    if (!parsedCaptions) {\n      parsedCaptions = {\n        captions: [],\n        // CC1, CC2, CC3, CC4\n        captionStreams: {}\n      };\n    } else {\n      this.clearParsedCaptions();\n    }\n\n    this.resetCaptionStream();\n  };\n\n  this.reset();\n};\n\nmodule.exports = CaptionParser;","/**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Reads in-band caption information from a video elementary\n * stream. Captions must follow the CEA-708 standard for injection\n * into an MPEG-2 transport streams.\n * @see https://en.wikipedia.org/wiki/CEA-708\n * @see https://www.gpo.gov/fdsys/pkg/CFR-2007-title47-vol1/pdf/CFR-2007-title47-vol1-sec15-119.pdf\n */\n'use strict'; // -----------------\n// Link To Transport\n// -----------------\n\nvar Stream = require('../utils/stream');\n\nvar cea708Parser = require('../tools/caption-packet-parser');\n\nvar CaptionStream = function CaptionStream() {\n  CaptionStream.prototype.init.call(this);\n  this.captionPackets_ = [];\n  this.ccStreams_ = [new Cea608Stream(0, 0), // eslint-disable-line no-use-before-define\n  new Cea608Stream(0, 1), // eslint-disable-line no-use-before-define\n  new Cea608Stream(1, 0), // eslint-disable-line no-use-before-define\n  new Cea608Stream(1, 1) // eslint-disable-line no-use-before-define\n  ];\n  this.reset(); // forward data and done events from CCs to this CaptionStream\n\n  this.ccStreams_.forEach(function (cc) {\n    cc.on('data', this.trigger.bind(this, 'data'));\n    cc.on('partialdone', this.trigger.bind(this, 'partialdone'));\n    cc.on('done', this.trigger.bind(this, 'done'));\n  }, this);\n};\n\nCaptionStream.prototype = new Stream();\n\nCaptionStream.prototype.push = function (event) {\n  var sei, userData, newCaptionPackets; // only examine SEI NALs\n\n  if (event.nalUnitType !== 'sei_rbsp') {\n    return;\n  } // parse the sei\n\n\n  sei = cea708Parser.parseSei(event.escapedRBSP); // ignore everything but user_data_registered_itu_t_t35\n\n  if (sei.payloadType !== cea708Parser.USER_DATA_REGISTERED_ITU_T_T35) {\n    return;\n  } // parse out the user data payload\n\n\n  userData = cea708Parser.parseUserData(sei); // ignore unrecognized userData\n\n  if (!userData) {\n    return;\n  } // Sometimes, the same segment # will be downloaded twice. To stop the\n  // caption data from being processed twice, we track the latest dts we've\n  // received and ignore everything with a dts before that. However, since\n  // data for a specific dts can be split across packets on either side of\n  // a segment boundary, we need to make sure we *don't* ignore the packets\n  // from the *next* segment that have dts === this.latestDts_. By constantly\n  // tracking the number of packets received with dts === this.latestDts_, we\n  // know how many should be ignored once we start receiving duplicates.\n\n\n  if (event.dts < this.latestDts_) {\n    // We've started getting older data, so set the flag.\n    this.ignoreNextEqualDts_ = true;\n    return;\n  } else if (event.dts === this.latestDts_ && this.ignoreNextEqualDts_) {\n    this.numSameDts_--;\n\n    if (!this.numSameDts_) {\n      // We've received the last duplicate packet, time to start processing again\n      this.ignoreNextEqualDts_ = false;\n    }\n\n    return;\n  } // parse out CC data packets and save them for later\n\n\n  newCaptionPackets = cea708Parser.parseCaptionPackets(event.pts, userData);\n  this.captionPackets_ = this.captionPackets_.concat(newCaptionPackets);\n\n  if (this.latestDts_ !== event.dts) {\n    this.numSameDts_ = 0;\n  }\n\n  this.numSameDts_++;\n  this.latestDts_ = event.dts;\n};\n\nCaptionStream.prototype.flushCCStreams = function (flushType) {\n  this.ccStreams_.forEach(function (cc) {\n    return flushType === 'flush' ? cc.flush() : cc.partialFlush();\n  }, this);\n};\n\nCaptionStream.prototype.flushStream = function (flushType) {\n  // make sure we actually parsed captions before proceeding\n  if (!this.captionPackets_.length) {\n    this.flushCCStreams(flushType);\n    return;\n  } // In Chrome, the Array#sort function is not stable so add a\n  // presortIndex that we can use to ensure we get a stable-sort\n\n\n  this.captionPackets_.forEach(function (elem, idx) {\n    elem.presortIndex = idx;\n  }); // sort caption byte-pairs based on their PTS values\n\n  this.captionPackets_.sort(function (a, b) {\n    if (a.pts === b.pts) {\n      return a.presortIndex - b.presortIndex;\n    }\n\n    return a.pts - b.pts;\n  });\n  this.captionPackets_.forEach(function (packet) {\n    if (packet.type < 2) {\n      // Dispatch packet to the right Cea608Stream\n      this.dispatchCea608Packet(packet);\n    } // this is where an 'else' would go for a dispatching packets\n    // to a theoretical Cea708Stream that handles SERVICEn data\n\n  }, this);\n  this.captionPackets_.length = 0;\n  this.flushCCStreams(flushType);\n};\n\nCaptionStream.prototype.flush = function () {\n  return this.flushStream('flush');\n}; // Only called if handling partial data\n\n\nCaptionStream.prototype.partialFlush = function () {\n  return this.flushStream('partialFlush');\n};\n\nCaptionStream.prototype.reset = function () {\n  this.latestDts_ = null;\n  this.ignoreNextEqualDts_ = false;\n  this.numSameDts_ = 0;\n  this.activeCea608Channel_ = [null, null];\n  this.ccStreams_.forEach(function (ccStream) {\n    ccStream.reset();\n  });\n}; // From the CEA-608 spec:\n\n/*\n * When XDS sub-packets are interleaved with other services, the end of each sub-packet shall be followed\n * by a control pair to change to a different service. When any of the control codes from 0x10 to 0x1F is\n * used to begin a control code pair, it indicates the return to captioning or Text data. The control code pair\n * and subsequent data should then be processed according to the FCC rules. It may be necessary for the\n * line 21 data encoder to automatically insert a control code pair (i.e. RCL, RU2, RU3, RU4, RDC, or RTD)\n * to switch to captioning or Text.\n*/\n// With that in mind, we ignore any data between an XDS control code and a\n// subsequent closed-captioning control code.\n\n\nCaptionStream.prototype.dispatchCea608Packet = function (packet) {\n  // NOTE: packet.type is the CEA608 field\n  if (this.setsTextOrXDSActive(packet)) {\n    this.activeCea608Channel_[packet.type] = null;\n  } else if (this.setsChannel1Active(packet)) {\n    this.activeCea608Channel_[packet.type] = 0;\n  } else if (this.setsChannel2Active(packet)) {\n    this.activeCea608Channel_[packet.type] = 1;\n  }\n\n  if (this.activeCea608Channel_[packet.type] === null) {\n    // If we haven't received anything to set the active channel, or the\n    // packets are Text/XDS data, discard the data; we don't want jumbled\n    // captions\n    return;\n  }\n\n  this.ccStreams_[(packet.type << 1) + this.activeCea608Channel_[packet.type]].push(packet);\n};\n\nCaptionStream.prototype.setsChannel1Active = function (packet) {\n  return (packet.ccData & 0x7800) === 0x1000;\n};\n\nCaptionStream.prototype.setsChannel2Active = function (packet) {\n  return (packet.ccData & 0x7800) === 0x1800;\n};\n\nCaptionStream.prototype.setsTextOrXDSActive = function (packet) {\n  return (packet.ccData & 0x7100) === 0x0100 || (packet.ccData & 0x78fe) === 0x102a || (packet.ccData & 0x78fe) === 0x182a;\n}; // ----------------------\n// Session to Application\n// ----------------------\n// This hash maps non-ASCII, special, and extended character codes to their\n// proper Unicode equivalent. The first keys that are only a single byte\n// are the non-standard ASCII characters, which simply map the CEA608 byte\n// to the standard ASCII/Unicode. The two-byte keys that follow are the CEA608\n// character codes, but have their MSB bitmasked with 0x03 so that a lookup\n// can be performed regardless of the field and data channel on which the\n// character code was received.\n\n\nvar CHARACTER_TRANSLATION = {\n  0x2a: 0xe1,\n  // á\n  0x5c: 0xe9,\n  // é\n  0x5e: 0xed,\n  // í\n  0x5f: 0xf3,\n  // ó\n  0x60: 0xfa,\n  // ú\n  0x7b: 0xe7,\n  // ç\n  0x7c: 0xf7,\n  // ÷\n  0x7d: 0xd1,\n  // Ñ\n  0x7e: 0xf1,\n  // ñ\n  0x7f: 0x2588,\n  // █\n  0x0130: 0xae,\n  // ®\n  0x0131: 0xb0,\n  // °\n  0x0132: 0xbd,\n  // ½\n  0x0133: 0xbf,\n  // ¿\n  0x0134: 0x2122,\n  // ™\n  0x0135: 0xa2,\n  // ¢\n  0x0136: 0xa3,\n  // £\n  0x0137: 0x266a,\n  // ♪\n  0x0138: 0xe0,\n  // à\n  0x0139: 0xa0,\n  //\n  0x013a: 0xe8,\n  // è\n  0x013b: 0xe2,\n  // â\n  0x013c: 0xea,\n  // ê\n  0x013d: 0xee,\n  // î\n  0x013e: 0xf4,\n  // ô\n  0x013f: 0xfb,\n  // û\n  0x0220: 0xc1,\n  // Á\n  0x0221: 0xc9,\n  // É\n  0x0222: 0xd3,\n  // Ó\n  0x0223: 0xda,\n  // Ú\n  0x0224: 0xdc,\n  // Ü\n  0x0225: 0xfc,\n  // ü\n  0x0226: 0x2018,\n  // ‘\n  0x0227: 0xa1,\n  // ¡\n  0x0228: 0x2a,\n  // *\n  0x0229: 0x27,\n  // '\n  0x022a: 0x2014,\n  // —\n  0x022b: 0xa9,\n  // ©\n  0x022c: 0x2120,\n  // ℠\n  0x022d: 0x2022,\n  // •\n  0x022e: 0x201c,\n  // “\n  0x022f: 0x201d,\n  // ”\n  0x0230: 0xc0,\n  // À\n  0x0231: 0xc2,\n  // Â\n  0x0232: 0xc7,\n  // Ç\n  0x0233: 0xc8,\n  // È\n  0x0234: 0xca,\n  // Ê\n  0x0235: 0xcb,\n  // Ë\n  0x0236: 0xeb,\n  // ë\n  0x0237: 0xce,\n  // Î\n  0x0238: 0xcf,\n  // Ï\n  0x0239: 0xef,\n  // ï\n  0x023a: 0xd4,\n  // Ô\n  0x023b: 0xd9,\n  // Ù\n  0x023c: 0xf9,\n  // ù\n  0x023d: 0xdb,\n  // Û\n  0x023e: 0xab,\n  // «\n  0x023f: 0xbb,\n  // »\n  0x0320: 0xc3,\n  // Ã\n  0x0321: 0xe3,\n  // ã\n  0x0322: 0xcd,\n  // Í\n  0x0323: 0xcc,\n  // Ì\n  0x0324: 0xec,\n  // ì\n  0x0325: 0xd2,\n  // Ò\n  0x0326: 0xf2,\n  // ò\n  0x0327: 0xd5,\n  // Õ\n  0x0328: 0xf5,\n  // õ\n  0x0329: 0x7b,\n  // {\n  0x032a: 0x7d,\n  // }\n  0x032b: 0x5c,\n  // \\\n  0x032c: 0x5e,\n  // ^\n  0x032d: 0x5f,\n  // _\n  0x032e: 0x7c,\n  // |\n  0x032f: 0x7e,\n  // ~\n  0x0330: 0xc4,\n  // Ä\n  0x0331: 0xe4,\n  // ä\n  0x0332: 0xd6,\n  // Ö\n  0x0333: 0xf6,\n  // ö\n  0x0334: 0xdf,\n  // ß\n  0x0335: 0xa5,\n  // ¥\n  0x0336: 0xa4,\n  // ¤\n  0x0337: 0x2502,\n  // │\n  0x0338: 0xc5,\n  // Å\n  0x0339: 0xe5,\n  // å\n  0x033a: 0xd8,\n  // Ø\n  0x033b: 0xf8,\n  // ø\n  0x033c: 0x250c,\n  // ┌\n  0x033d: 0x2510,\n  // ┐\n  0x033e: 0x2514,\n  // └\n  0x033f: 0x2518 // ┘\n\n};\n\nvar getCharFromCode = function getCharFromCode(code) {\n  if (code === null) {\n    return '';\n  }\n\n  code = CHARACTER_TRANSLATION[code] || code;\n  return String.fromCharCode(code);\n}; // the index of the last row in a CEA-608 display buffer\n\n\nvar BOTTOM_ROW = 14; // This array is used for mapping PACs -> row #, since there's no way of\n// getting it through bit logic.\n\nvar ROWS = [0x1100, 0x1120, 0x1200, 0x1220, 0x1500, 0x1520, 0x1600, 0x1620, 0x1700, 0x1720, 0x1000, 0x1300, 0x1320, 0x1400, 0x1420]; // CEA-608 captions are rendered onto a 34x15 matrix of character\n// cells. The \"bottom\" row is the last element in the outer array.\n\nvar createDisplayBuffer = function createDisplayBuffer() {\n  var result = [],\n      i = BOTTOM_ROW + 1;\n\n  while (i--) {\n    result.push('');\n  }\n\n  return result;\n};\n\nvar Cea608Stream = function Cea608Stream(field, dataChannel) {\n  Cea608Stream.prototype.init.call(this);\n  this.field_ = field || 0;\n  this.dataChannel_ = dataChannel || 0;\n  this.name_ = 'CC' + ((this.field_ << 1 | this.dataChannel_) + 1);\n  this.setConstants();\n  this.reset();\n\n  this.push = function (packet) {\n    var data, swap, char0, char1, text; // remove the parity bits\n\n    data = packet.ccData & 0x7f7f; // ignore duplicate control codes; the spec demands they're sent twice\n\n    if (data === this.lastControlCode_) {\n      this.lastControlCode_ = null;\n      return;\n    } // Store control codes\n\n\n    if ((data & 0xf000) === 0x1000) {\n      this.lastControlCode_ = data;\n    } else if (data !== this.PADDING_) {\n      this.lastControlCode_ = null;\n    }\n\n    char0 = data >>> 8;\n    char1 = data & 0xff;\n\n    if (data === this.PADDING_) {\n      return;\n    } else if (data === this.RESUME_CAPTION_LOADING_) {\n      this.mode_ = 'popOn';\n    } else if (data === this.END_OF_CAPTION_) {\n      // If an EOC is received while in paint-on mode, the displayed caption\n      // text should be swapped to non-displayed memory as if it was a pop-on\n      // caption. Because of that, we should explicitly switch back to pop-on\n      // mode\n      this.mode_ = 'popOn';\n      this.clearFormatting(packet.pts); // if a caption was being displayed, it's gone now\n\n      this.flushDisplayed(packet.pts); // flip memory\n\n      swap = this.displayed_;\n      this.displayed_ = this.nonDisplayed_;\n      this.nonDisplayed_ = swap; // start measuring the time to display the caption\n\n      this.startPts_ = packet.pts;\n    } else if (data === this.ROLL_UP_2_ROWS_) {\n      this.rollUpRows_ = 2;\n      this.setRollUp(packet.pts);\n    } else if (data === this.ROLL_UP_3_ROWS_) {\n      this.rollUpRows_ = 3;\n      this.setRollUp(packet.pts);\n    } else if (data === this.ROLL_UP_4_ROWS_) {\n      this.rollUpRows_ = 4;\n      this.setRollUp(packet.pts);\n    } else if (data === this.CARRIAGE_RETURN_) {\n      this.clearFormatting(packet.pts);\n      this.flushDisplayed(packet.pts);\n      this.shiftRowsUp_();\n      this.startPts_ = packet.pts;\n    } else if (data === this.BACKSPACE_) {\n      if (this.mode_ === 'popOn') {\n        this.nonDisplayed_[this.row_] = this.nonDisplayed_[this.row_].slice(0, -1);\n      } else {\n        this.displayed_[this.row_] = this.displayed_[this.row_].slice(0, -1);\n      }\n    } else if (data === this.ERASE_DISPLAYED_MEMORY_) {\n      this.flushDisplayed(packet.pts);\n      this.displayed_ = createDisplayBuffer();\n    } else if (data === this.ERASE_NON_DISPLAYED_MEMORY_) {\n      this.nonDisplayed_ = createDisplayBuffer();\n    } else if (data === this.RESUME_DIRECT_CAPTIONING_) {\n      if (this.mode_ !== 'paintOn') {\n        // NOTE: This should be removed when proper caption positioning is\n        // implemented\n        this.flushDisplayed(packet.pts);\n        this.displayed_ = createDisplayBuffer();\n      }\n\n      this.mode_ = 'paintOn';\n      this.startPts_ = packet.pts; // Append special characters to caption text\n    } else if (this.isSpecialCharacter(char0, char1)) {\n      // Bitmask char0 so that we can apply character transformations\n      // regardless of field and data channel.\n      // Then byte-shift to the left and OR with char1 so we can pass the\n      // entire character code to `getCharFromCode`.\n      char0 = (char0 & 0x03) << 8;\n      text = getCharFromCode(char0 | char1);\n      this[this.mode_](packet.pts, text);\n      this.column_++; // Append extended characters to caption text\n    } else if (this.isExtCharacter(char0, char1)) {\n      // Extended characters always follow their \"non-extended\" equivalents.\n      // IE if a \"è\" is desired, you'll always receive \"eè\"; non-compliant\n      // decoders are supposed to drop the \"è\", while compliant decoders\n      // backspace the \"e\" and insert \"è\".\n      // Delete the previous character\n      if (this.mode_ === 'popOn') {\n        this.nonDisplayed_[this.row_] = this.nonDisplayed_[this.row_].slice(0, -1);\n      } else {\n        this.displayed_[this.row_] = this.displayed_[this.row_].slice(0, -1);\n      } // Bitmask char0 so that we can apply character transformations\n      // regardless of field and data channel.\n      // Then byte-shift to the left and OR with char1 so we can pass the\n      // entire character code to `getCharFromCode`.\n\n\n      char0 = (char0 & 0x03) << 8;\n      text = getCharFromCode(char0 | char1);\n      this[this.mode_](packet.pts, text);\n      this.column_++; // Process mid-row codes\n    } else if (this.isMidRowCode(char0, char1)) {\n      // Attributes are not additive, so clear all formatting\n      this.clearFormatting(packet.pts); // According to the standard, mid-row codes\n      // should be replaced with spaces, so add one now\n\n      this[this.mode_](packet.pts, ' ');\n      this.column_++;\n\n      if ((char1 & 0xe) === 0xe) {\n        this.addFormatting(packet.pts, ['i']);\n      }\n\n      if ((char1 & 0x1) === 0x1) {\n        this.addFormatting(packet.pts, ['u']);\n      } // Detect offset control codes and adjust cursor\n\n    } else if (this.isOffsetControlCode(char0, char1)) {\n      // Cursor position is set by indent PAC (see below) in 4-column\n      // increments, with an additional offset code of 1-3 to reach any\n      // of the 32 columns specified by CEA-608. So all we need to do\n      // here is increment the column cursor by the given offset.\n      this.column_ += char1 & 0x03; // Detect PACs (Preamble Address Codes)\n    } else if (this.isPAC(char0, char1)) {\n      // There's no logic for PAC -> row mapping, so we have to just\n      // find the row code in an array and use its index :(\n      var row = ROWS.indexOf(data & 0x1f20); // Configure the caption window if we're in roll-up mode\n\n      if (this.mode_ === 'rollUp') {\n        // This implies that the base row is incorrectly set.\n        // As per the recommendation in CEA-608(Base Row Implementation), defer to the number\n        // of roll-up rows set.\n        if (row - this.rollUpRows_ + 1 < 0) {\n          row = this.rollUpRows_ - 1;\n        }\n\n        this.setRollUp(packet.pts, row);\n      }\n\n      if (row !== this.row_) {\n        // formatting is only persistent for current row\n        this.clearFormatting(packet.pts);\n        this.row_ = row;\n      } // All PACs can apply underline, so detect and apply\n      // (All odd-numbered second bytes set underline)\n\n\n      if (char1 & 0x1 && this.formatting_.indexOf('u') === -1) {\n        this.addFormatting(packet.pts, ['u']);\n      }\n\n      if ((data & 0x10) === 0x10) {\n        // We've got an indent level code. Each successive even number\n        // increments the column cursor by 4, so we can get the desired\n        // column position by bit-shifting to the right (to get n/2)\n        // and multiplying by 4.\n        this.column_ = ((data & 0xe) >> 1) * 4;\n      }\n\n      if (this.isColorPAC(char1)) {\n        // it's a color code, though we only support white, which\n        // can be either normal or italicized. white italics can be\n        // either 0x4e or 0x6e depending on the row, so we just\n        // bitwise-and with 0xe to see if italics should be turned on\n        if ((char1 & 0xe) === 0xe) {\n          this.addFormatting(packet.pts, ['i']);\n        }\n      } // We have a normal character in char0, and possibly one in char1\n\n    } else if (this.isNormalChar(char0)) {\n      if (char1 === 0x00) {\n        char1 = null;\n      }\n\n      text = getCharFromCode(char0);\n      text += getCharFromCode(char1);\n      this[this.mode_](packet.pts, text);\n      this.column_ += text.length;\n    } // finish data processing\n\n  };\n};\n\nCea608Stream.prototype = new Stream(); // Trigger a cue point that captures the current state of the\n// display buffer\n\nCea608Stream.prototype.flushDisplayed = function (pts) {\n  var content = this.displayed_ // remove spaces from the start and end of the string\n  .map(function (row) {\n    try {\n      return row.trim();\n    } catch (e) {\n      // Ordinarily, this shouldn't happen. However, caption\n      // parsing errors should not throw exceptions and\n      // break playback.\n      // eslint-disable-next-line no-console\n      console.error('Skipping malformed caption.');\n      return '';\n    }\n  }) // combine all text rows to display in one cue\n  .join('\\n') // and remove blank rows from the start and end, but not the middle\n  .replace(/^\\n+|\\n+$/g, '');\n\n  if (content.length) {\n    this.trigger('data', {\n      startPts: this.startPts_,\n      endPts: pts,\n      text: content,\n      stream: this.name_\n    });\n  }\n};\n/**\n * Zero out the data, used for startup and on seek\n */\n\n\nCea608Stream.prototype.reset = function () {\n  this.mode_ = 'popOn'; // When in roll-up mode, the index of the last row that will\n  // actually display captions. If a caption is shifted to a row\n  // with a lower index than this, it is cleared from the display\n  // buffer\n\n  this.topRow_ = 0;\n  this.startPts_ = 0;\n  this.displayed_ = createDisplayBuffer();\n  this.nonDisplayed_ = createDisplayBuffer();\n  this.lastControlCode_ = null; // Track row and column for proper line-breaking and spacing\n\n  this.column_ = 0;\n  this.row_ = BOTTOM_ROW;\n  this.rollUpRows_ = 2; // This variable holds currently-applied formatting\n\n  this.formatting_ = [];\n};\n/**\n * Sets up control code and related constants for this instance\n */\n\n\nCea608Stream.prototype.setConstants = function () {\n  // The following attributes have these uses:\n  // ext_ :    char0 for mid-row codes, and the base for extended\n  //           chars (ext_+0, ext_+1, and ext_+2 are char0s for\n  //           extended codes)\n  // control_: char0 for control codes, except byte-shifted to the\n  //           left so that we can do this.control_ | CONTROL_CODE\n  // offset_:  char0 for tab offset codes\n  //\n  // It's also worth noting that control codes, and _only_ control codes,\n  // differ between field 1 and field2. Field 2 control codes are always\n  // their field 1 value plus 1. That's why there's the \"| field\" on the\n  // control value.\n  if (this.dataChannel_ === 0) {\n    this.BASE_ = 0x10;\n    this.EXT_ = 0x11;\n    this.CONTROL_ = (0x14 | this.field_) << 8;\n    this.OFFSET_ = 0x17;\n  } else if (this.dataChannel_ === 1) {\n    this.BASE_ = 0x18;\n    this.EXT_ = 0x19;\n    this.CONTROL_ = (0x1c | this.field_) << 8;\n    this.OFFSET_ = 0x1f;\n  } // Constants for the LSByte command codes recognized by Cea608Stream. This\n  // list is not exhaustive. For a more comprehensive listing and semantics see\n  // http://www.gpo.gov/fdsys/pkg/CFR-2010-title47-vol1/pdf/CFR-2010-title47-vol1-sec15-119.pdf\n  // Padding\n\n\n  this.PADDING_ = 0x0000; // Pop-on Mode\n\n  this.RESUME_CAPTION_LOADING_ = this.CONTROL_ | 0x20;\n  this.END_OF_CAPTION_ = this.CONTROL_ | 0x2f; // Roll-up Mode\n\n  this.ROLL_UP_2_ROWS_ = this.CONTROL_ | 0x25;\n  this.ROLL_UP_3_ROWS_ = this.CONTROL_ | 0x26;\n  this.ROLL_UP_4_ROWS_ = this.CONTROL_ | 0x27;\n  this.CARRIAGE_RETURN_ = this.CONTROL_ | 0x2d; // paint-on mode\n\n  this.RESUME_DIRECT_CAPTIONING_ = this.CONTROL_ | 0x29; // Erasure\n\n  this.BACKSPACE_ = this.CONTROL_ | 0x21;\n  this.ERASE_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2c;\n  this.ERASE_NON_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2e;\n};\n/**\n * Detects if the 2-byte packet data is a special character\n *\n * Special characters have a second byte in the range 0x30 to 0x3f,\n * with the first byte being 0x11 (for data channel 1) or 0x19 (for\n * data channel 2).\n *\n * @param  {Integer} char0 The first byte\n * @param  {Integer} char1 The second byte\n * @return {Boolean}       Whether the 2 bytes are an special character\n */\n\n\nCea608Stream.prototype.isSpecialCharacter = function (char0, char1) {\n  return char0 === this.EXT_ && char1 >= 0x30 && char1 <= 0x3f;\n};\n/**\n * Detects if the 2-byte packet data is an extended character\n *\n * Extended characters have a second byte in the range 0x20 to 0x3f,\n * with the first byte being 0x12 or 0x13 (for data channel 1) or\n * 0x1a or 0x1b (for data channel 2).\n *\n * @param  {Integer} char0 The first byte\n * @param  {Integer} char1 The second byte\n * @return {Boolean}       Whether the 2 bytes are an extended character\n */\n\n\nCea608Stream.prototype.isExtCharacter = function (char0, char1) {\n  return (char0 === this.EXT_ + 1 || char0 === this.EXT_ + 2) && char1 >= 0x20 && char1 <= 0x3f;\n};\n/**\n * Detects if the 2-byte packet is a mid-row code\n *\n * Mid-row codes have a second byte in the range 0x20 to 0x2f, with\n * the first byte being 0x11 (for data channel 1) or 0x19 (for data\n * channel 2).\n *\n * @param  {Integer} char0 The first byte\n * @param  {Integer} char1 The second byte\n * @return {Boolean}       Whether the 2 bytes are a mid-row code\n */\n\n\nCea608Stream.prototype.isMidRowCode = function (char0, char1) {\n  return char0 === this.EXT_ && char1 >= 0x20 && char1 <= 0x2f;\n};\n/**\n * Detects if the 2-byte packet is an offset control code\n *\n * Offset control codes have a second byte in the range 0x21 to 0x23,\n * with the first byte being 0x17 (for data channel 1) or 0x1f (for\n * data channel 2).\n *\n * @param  {Integer} char0 The first byte\n * @param  {Integer} char1 The second byte\n * @return {Boolean}       Whether the 2 bytes are an offset control code\n */\n\n\nCea608Stream.prototype.isOffsetControlCode = function (char0, char1) {\n  return char0 === this.OFFSET_ && char1 >= 0x21 && char1 <= 0x23;\n};\n/**\n * Detects if the 2-byte packet is a Preamble Address Code\n *\n * PACs have a first byte in the range 0x10 to 0x17 (for data channel 1)\n * or 0x18 to 0x1f (for data channel 2), with the second byte in the\n * range 0x40 to 0x7f.\n *\n * @param  {Integer} char0 The first byte\n * @param  {Integer} char1 The second byte\n * @return {Boolean}       Whether the 2 bytes are a PAC\n */\n\n\nCea608Stream.prototype.isPAC = function (char0, char1) {\n  return char0 >= this.BASE_ && char0 < this.BASE_ + 8 && char1 >= 0x40 && char1 <= 0x7f;\n};\n/**\n * Detects if a packet's second byte is in the range of a PAC color code\n *\n * PAC color codes have the second byte be in the range 0x40 to 0x4f, or\n * 0x60 to 0x6f.\n *\n * @param  {Integer} char1 The second byte\n * @return {Boolean}       Whether the byte is a color PAC\n */\n\n\nCea608Stream.prototype.isColorPAC = function (char1) {\n  return char1 >= 0x40 && char1 <= 0x4f || char1 >= 0x60 && char1 <= 0x7f;\n};\n/**\n * Detects if a single byte is in the range of a normal character\n *\n * Normal text bytes are in the range 0x20 to 0x7f.\n *\n * @param  {Integer} char  The byte\n * @return {Boolean}       Whether the byte is a normal character\n */\n\n\nCea608Stream.prototype.isNormalChar = function (char) {\n  return char >= 0x20 && char <= 0x7f;\n};\n/**\n * Configures roll-up\n *\n * @param  {Integer} pts         Current PTS\n * @param  {Integer} newBaseRow  Used by PACs to slide the current window to\n *                               a new position\n */\n\n\nCea608Stream.prototype.setRollUp = function (pts, newBaseRow) {\n  // Reset the base row to the bottom row when switching modes\n  if (this.mode_ !== 'rollUp') {\n    this.row_ = BOTTOM_ROW;\n    this.mode_ = 'rollUp'; // Spec says to wipe memories when switching to roll-up\n\n    this.flushDisplayed(pts);\n    this.nonDisplayed_ = createDisplayBuffer();\n    this.displayed_ = createDisplayBuffer();\n  }\n\n  if (newBaseRow !== undefined && newBaseRow !== this.row_) {\n    // move currently displayed captions (up or down) to the new base row\n    for (var i = 0; i < this.rollUpRows_; i++) {\n      this.displayed_[newBaseRow - i] = this.displayed_[this.row_ - i];\n      this.displayed_[this.row_ - i] = '';\n    }\n  }\n\n  if (newBaseRow === undefined) {\n    newBaseRow = this.row_;\n  }\n\n  this.topRow_ = newBaseRow - this.rollUpRows_ + 1;\n}; // Adds the opening HTML tag for the passed character to the caption text,\n// and keeps track of it for later closing\n\n\nCea608Stream.prototype.addFormatting = function (pts, format) {\n  this.formatting_ = this.formatting_.concat(format);\n  var text = format.reduce(function (text, format) {\n    return text + '<' + format + '>';\n  }, '');\n  this[this.mode_](pts, text);\n}; // Adds HTML closing tags for current formatting to caption text and\n// clears remembered formatting\n\n\nCea608Stream.prototype.clearFormatting = function (pts) {\n  if (!this.formatting_.length) {\n    return;\n  }\n\n  var text = this.formatting_.reverse().reduce(function (text, format) {\n    return text + '</' + format + '>';\n  }, '');\n  this.formatting_ = [];\n  this[this.mode_](pts, text);\n}; // Mode Implementations\n\n\nCea608Stream.prototype.popOn = function (pts, text) {\n  var baseRow = this.nonDisplayed_[this.row_]; // buffer characters\n\n  baseRow += text;\n  this.nonDisplayed_[this.row_] = baseRow;\n};\n\nCea608Stream.prototype.rollUp = function (pts, text) {\n  var baseRow = this.displayed_[this.row_];\n  baseRow += text;\n  this.displayed_[this.row_] = baseRow;\n};\n\nCea608Stream.prototype.shiftRowsUp_ = function () {\n  var i; // clear out inactive rows\n\n  for (i = 0; i < this.topRow_; i++) {\n    this.displayed_[i] = '';\n  }\n\n  for (i = this.row_ + 1; i < BOTTOM_ROW + 1; i++) {\n    this.displayed_[i] = '';\n  } // shift displayed rows up\n\n\n  for (i = this.topRow_; i < this.row_; i++) {\n    this.displayed_[i] = this.displayed_[i + 1];\n  } // clear out the bottom row\n\n\n  this.displayed_[this.row_] = '';\n};\n\nCea608Stream.prototype.paintOn = function (pts, text) {\n  var baseRow = this.displayed_[this.row_];\n  baseRow += text;\n  this.displayed_[this.row_] = baseRow;\n}; // exports\n\n\nmodule.exports = {\n  CaptionStream: CaptionStream,\n  Cea608Stream: Cea608Stream\n};","/**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Parse mpeg2 transport stream packets to extract basic timing information\n */\n'use strict';\n\nvar StreamTypes = require('../m2ts/stream-types.js');\n\nvar handleRollover = require('../m2ts/timestamp-rollover-stream.js').handleRollover;\n\nvar probe = {};\nprobe.ts = require('../m2ts/probe.js');\nprobe.aac = require('../aac/utils.js');\n\nvar ONE_SECOND_IN_TS = require('../utils/clock').ONE_SECOND_IN_TS;\n\nvar MP2T_PACKET_LENGTH = 188,\n    // bytes\nSYNC_BYTE = 0x47;\n/**\n * walks through segment data looking for pat and pmt packets to parse out\n * program map table information\n */\n\nvar parsePsi_ = function parsePsi_(bytes, pmt) {\n  var startIndex = 0,\n      endIndex = MP2T_PACKET_LENGTH,\n      packet,\n      type;\n\n  while (endIndex < bytes.byteLength) {\n    // Look for a pair of start and end sync bytes in the data..\n    if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n      // We found a packet\n      packet = bytes.subarray(startIndex, endIndex);\n      type = probe.ts.parseType(packet, pmt.pid);\n\n      switch (type) {\n        case 'pat':\n          if (!pmt.pid) {\n            pmt.pid = probe.ts.parsePat(packet);\n          }\n\n          break;\n\n        case 'pmt':\n          if (!pmt.table) {\n            pmt.table = probe.ts.parsePmt(packet);\n          }\n\n          break;\n\n        default:\n          break;\n      } // Found the pat and pmt, we can stop walking the segment\n\n\n      if (pmt.pid && pmt.table) {\n        return;\n      }\n\n      startIndex += MP2T_PACKET_LENGTH;\n      endIndex += MP2T_PACKET_LENGTH;\n      continue;\n    } // If we get here, we have somehow become de-synchronized and we need to step\n    // forward one byte at a time until we find a pair of sync bytes that denote\n    // a packet\n\n\n    startIndex++;\n    endIndex++;\n  }\n};\n/**\n * walks through the segment data from the start and end to get timing information\n * for the first and last audio pes packets\n */\n\n\nvar parseAudioPes_ = function parseAudioPes_(bytes, pmt, result) {\n  var startIndex = 0,\n      endIndex = MP2T_PACKET_LENGTH,\n      packet,\n      type,\n      pesType,\n      pusi,\n      parsed;\n  var endLoop = false; // Start walking from start of segment to get first audio packet\n\n  while (endIndex <= bytes.byteLength) {\n    // Look for a pair of start and end sync bytes in the data..\n    if (bytes[startIndex] === SYNC_BYTE && (bytes[endIndex] === SYNC_BYTE || endIndex === bytes.byteLength)) {\n      // We found a packet\n      packet = bytes.subarray(startIndex, endIndex);\n      type = probe.ts.parseType(packet, pmt.pid);\n\n      switch (type) {\n        case 'pes':\n          pesType = probe.ts.parsePesType(packet, pmt.table);\n          pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n          if (pesType === 'audio' && pusi) {\n            parsed = probe.ts.parsePesTime(packet);\n\n            if (parsed) {\n              parsed.type = 'audio';\n              result.audio.push(parsed);\n              endLoop = true;\n            }\n          }\n\n          break;\n\n        default:\n          break;\n      }\n\n      if (endLoop) {\n        break;\n      }\n\n      startIndex += MP2T_PACKET_LENGTH;\n      endIndex += MP2T_PACKET_LENGTH;\n      continue;\n    } // If we get here, we have somehow become de-synchronized and we need to step\n    // forward one byte at a time until we find a pair of sync bytes that denote\n    // a packet\n\n\n    startIndex++;\n    endIndex++;\n  } // Start walking from end of segment to get last audio packet\n\n\n  endIndex = bytes.byteLength;\n  startIndex = endIndex - MP2T_PACKET_LENGTH;\n  endLoop = false;\n\n  while (startIndex >= 0) {\n    // Look for a pair of start and end sync bytes in the data..\n    if (bytes[startIndex] === SYNC_BYTE && (bytes[endIndex] === SYNC_BYTE || endIndex === bytes.byteLength)) {\n      // We found a packet\n      packet = bytes.subarray(startIndex, endIndex);\n      type = probe.ts.parseType(packet, pmt.pid);\n\n      switch (type) {\n        case 'pes':\n          pesType = probe.ts.parsePesType(packet, pmt.table);\n          pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n          if (pesType === 'audio' && pusi) {\n            parsed = probe.ts.parsePesTime(packet);\n\n            if (parsed) {\n              parsed.type = 'audio';\n              result.audio.push(parsed);\n              endLoop = true;\n            }\n          }\n\n          break;\n\n        default:\n          break;\n      }\n\n      if (endLoop) {\n        break;\n      }\n\n      startIndex -= MP2T_PACKET_LENGTH;\n      endIndex -= MP2T_PACKET_LENGTH;\n      continue;\n    } // If we get here, we have somehow become de-synchronized and we need to step\n    // forward one byte at a time until we find a pair of sync bytes that denote\n    // a packet\n\n\n    startIndex--;\n    endIndex--;\n  }\n};\n/**\n * walks through the segment data from the start and end to get timing information\n * for the first and last video pes packets as well as timing information for the first\n * key frame.\n */\n\n\nvar parseVideoPes_ = function parseVideoPes_(bytes, pmt, result) {\n  var startIndex = 0,\n      endIndex = MP2T_PACKET_LENGTH,\n      packet,\n      type,\n      pesType,\n      pusi,\n      parsed,\n      frame,\n      i,\n      pes;\n  var endLoop = false;\n  var currentFrame = {\n    data: [],\n    size: 0\n  }; // Start walking from start of segment to get first video packet\n\n  while (endIndex < bytes.byteLength) {\n    // Look for a pair of start and end sync bytes in the data..\n    if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n      // We found a packet\n      packet = bytes.subarray(startIndex, endIndex);\n      type = probe.ts.parseType(packet, pmt.pid);\n\n      switch (type) {\n        case 'pes':\n          pesType = probe.ts.parsePesType(packet, pmt.table);\n          pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n          if (pesType === 'video') {\n            if (pusi && !endLoop) {\n              parsed = probe.ts.parsePesTime(packet);\n\n              if (parsed) {\n                parsed.type = 'video';\n                result.video.push(parsed);\n                endLoop = true;\n              }\n            }\n\n            if (!result.firstKeyFrame) {\n              if (pusi) {\n                if (currentFrame.size !== 0) {\n                  frame = new Uint8Array(currentFrame.size);\n                  i = 0;\n\n                  while (currentFrame.data.length) {\n                    pes = currentFrame.data.shift();\n                    frame.set(pes, i);\n                    i += pes.byteLength;\n                  }\n\n                  if (probe.ts.videoPacketContainsKeyFrame(frame)) {\n                    var firstKeyFrame = probe.ts.parsePesTime(frame); // PTS/DTS may not be available. Simply *not* setting\n                    // the keyframe seems to work fine with HLS playback\n                    // and definitely preferable to a crash with TypeError...\n\n                    if (firstKeyFrame) {\n                      result.firstKeyFrame = firstKeyFrame;\n                      result.firstKeyFrame.type = 'video';\n                    } else {\n                      // eslint-disable-next-line\n                      console.warn('Failed to extract PTS/DTS from PES at first keyframe. ' + 'This could be an unusual TS segment, or else mux.js did not ' + 'parse your TS segment correctly. If you know your TS ' + 'segments do contain PTS/DTS on keyframes please file a bug ' + 'report! You can try ffprobe to double check for yourself.');\n                    }\n                  }\n\n                  currentFrame.size = 0;\n                }\n              }\n\n              currentFrame.data.push(packet);\n              currentFrame.size += packet.byteLength;\n            }\n          }\n\n          break;\n\n        default:\n          break;\n      }\n\n      if (endLoop && result.firstKeyFrame) {\n        break;\n      }\n\n      startIndex += MP2T_PACKET_LENGTH;\n      endIndex += MP2T_PACKET_LENGTH;\n      continue;\n    } // If we get here, we have somehow become de-synchronized and we need to step\n    // forward one byte at a time until we find a pair of sync bytes that denote\n    // a packet\n\n\n    startIndex++;\n    endIndex++;\n  } // Start walking from end of segment to get last video packet\n\n\n  endIndex = bytes.byteLength;\n  startIndex = endIndex - MP2T_PACKET_LENGTH;\n  endLoop = false;\n\n  while (startIndex >= 0) {\n    // Look for a pair of start and end sync bytes in the data..\n    if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n      // We found a packet\n      packet = bytes.subarray(startIndex, endIndex);\n      type = probe.ts.parseType(packet, pmt.pid);\n\n      switch (type) {\n        case 'pes':\n          pesType = probe.ts.parsePesType(packet, pmt.table);\n          pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n          if (pesType === 'video' && pusi) {\n            parsed = probe.ts.parsePesTime(packet);\n\n            if (parsed) {\n              parsed.type = 'video';\n              result.video.push(parsed);\n              endLoop = true;\n            }\n          }\n\n          break;\n\n        default:\n          break;\n      }\n\n      if (endLoop) {\n        break;\n      }\n\n      startIndex -= MP2T_PACKET_LENGTH;\n      endIndex -= MP2T_PACKET_LENGTH;\n      continue;\n    } // If we get here, we have somehow become de-synchronized and we need to step\n    // forward one byte at a time until we find a pair of sync bytes that denote\n    // a packet\n\n\n    startIndex--;\n    endIndex--;\n  }\n};\n/**\n * Adjusts the timestamp information for the segment to account for\n * rollover and convert to seconds based on pes packet timescale (90khz clock)\n */\n\n\nvar adjustTimestamp_ = function adjustTimestamp_(segmentInfo, baseTimestamp) {\n  if (segmentInfo.audio && segmentInfo.audio.length) {\n    var audioBaseTimestamp = baseTimestamp;\n\n    if (typeof audioBaseTimestamp === 'undefined') {\n      audioBaseTimestamp = segmentInfo.audio[0].dts;\n    }\n\n    segmentInfo.audio.forEach(function (info) {\n      info.dts = handleRollover(info.dts, audioBaseTimestamp);\n      info.pts = handleRollover(info.pts, audioBaseTimestamp); // time in seconds\n\n      info.dtsTime = info.dts / ONE_SECOND_IN_TS;\n      info.ptsTime = info.pts / ONE_SECOND_IN_TS;\n    });\n  }\n\n  if (segmentInfo.video && segmentInfo.video.length) {\n    var videoBaseTimestamp = baseTimestamp;\n\n    if (typeof videoBaseTimestamp === 'undefined') {\n      videoBaseTimestamp = segmentInfo.video[0].dts;\n    }\n\n    segmentInfo.video.forEach(function (info) {\n      info.dts = handleRollover(info.dts, videoBaseTimestamp);\n      info.pts = handleRollover(info.pts, videoBaseTimestamp); // time in seconds\n\n      info.dtsTime = info.dts / ONE_SECOND_IN_TS;\n      info.ptsTime = info.pts / ONE_SECOND_IN_TS;\n    });\n\n    if (segmentInfo.firstKeyFrame) {\n      var frame = segmentInfo.firstKeyFrame;\n      frame.dts = handleRollover(frame.dts, videoBaseTimestamp);\n      frame.pts = handleRollover(frame.pts, videoBaseTimestamp); // time in seconds\n\n      frame.dtsTime = frame.dts / ONE_SECOND_IN_TS;\n      frame.ptsTime = frame.dts / ONE_SECOND_IN_TS;\n    }\n  }\n};\n/**\n * inspects the aac data stream for start and end time information\n */\n\n\nvar inspectAac_ = function inspectAac_(bytes) {\n  var endLoop = false,\n      audioCount = 0,\n      sampleRate = null,\n      timestamp = null,\n      frameSize = 0,\n      byteIndex = 0,\n      packet;\n\n  while (bytes.length - byteIndex >= 3) {\n    var type = probe.aac.parseType(bytes, byteIndex);\n\n    switch (type) {\n      case 'timed-metadata':\n        // Exit early because we don't have enough to parse\n        // the ID3 tag header\n        if (bytes.length - byteIndex < 10) {\n          endLoop = true;\n          break;\n        }\n\n        frameSize = probe.aac.parseId3TagSize(bytes, byteIndex); // Exit early if we don't have enough in the buffer\n        // to emit a full packet\n\n        if (frameSize > bytes.length) {\n          endLoop = true;\n          break;\n        }\n\n        if (timestamp === null) {\n          packet = bytes.subarray(byteIndex, byteIndex + frameSize);\n          timestamp = probe.aac.parseAacTimestamp(packet);\n        }\n\n        byteIndex += frameSize;\n        break;\n\n      case 'audio':\n        // Exit early because we don't have enough to parse\n        // the ADTS frame header\n        if (bytes.length - byteIndex < 7) {\n          endLoop = true;\n          break;\n        }\n\n        frameSize = probe.aac.parseAdtsSize(bytes, byteIndex); // Exit early if we don't have enough in the buffer\n        // to emit a full packet\n\n        if (frameSize > bytes.length) {\n          endLoop = true;\n          break;\n        }\n\n        if (sampleRate === null) {\n          packet = bytes.subarray(byteIndex, byteIndex + frameSize);\n          sampleRate = probe.aac.parseSampleRate(packet);\n        }\n\n        audioCount++;\n        byteIndex += frameSize;\n        break;\n\n      default:\n        byteIndex++;\n        break;\n    }\n\n    if (endLoop) {\n      return null;\n    }\n  }\n\n  if (sampleRate === null || timestamp === null) {\n    return null;\n  }\n\n  var audioTimescale = ONE_SECOND_IN_TS / sampleRate;\n  var result = {\n    audio: [{\n      type: 'audio',\n      dts: timestamp,\n      pts: timestamp\n    }, {\n      type: 'audio',\n      dts: timestamp + audioCount * 1024 * audioTimescale,\n      pts: timestamp + audioCount * 1024 * audioTimescale\n    }]\n  };\n  return result;\n};\n/**\n * inspects the transport stream segment data for start and end time information\n * of the audio and video tracks (when present) as well as the first key frame's\n * start time.\n */\n\n\nvar inspectTs_ = function inspectTs_(bytes) {\n  var pmt = {\n    pid: null,\n    table: null\n  };\n  var result = {};\n  parsePsi_(bytes, pmt);\n\n  for (var pid in pmt.table) {\n    if (pmt.table.hasOwnProperty(pid)) {\n      var type = pmt.table[pid];\n\n      switch (type) {\n        case StreamTypes.H264_STREAM_TYPE:\n          result.video = [];\n          parseVideoPes_(bytes, pmt, result);\n\n          if (result.video.length === 0) {\n            delete result.video;\n          }\n\n          break;\n\n        case StreamTypes.ADTS_STREAM_TYPE:\n          result.audio = [];\n          parseAudioPes_(bytes, pmt, result);\n\n          if (result.audio.length === 0) {\n            delete result.audio;\n          }\n\n          break;\n\n        default:\n          break;\n      }\n    }\n  }\n\n  return result;\n};\n/**\n * Inspects segment byte data and returns an object with start and end timing information\n *\n * @param {Uint8Array} bytes The segment byte data\n * @param {Number} baseTimestamp Relative reference timestamp used when adjusting frame\n *  timestamps for rollover. This value must be in 90khz clock.\n * @return {Object} Object containing start and end frame timing info of segment.\n */\n\n\nvar inspect = function inspect(bytes, baseTimestamp) {\n  var isAacData = probe.aac.isLikelyAacData(bytes);\n  var result;\n\n  if (isAacData) {\n    result = inspectAac_(bytes);\n  } else {\n    result = inspectTs_(bytes);\n  }\n\n  if (!result || !result.audio && !result.video) {\n    return null;\n  }\n\n  adjustTimestamp_(result, baseTimestamp);\n  return result;\n};\n\nmodule.exports = {\n  inspect: inspect,\n  parseAudioPes_: parseAudioPes_\n};","/**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Accepts program elementary stream (PES) data events and corrects\n * decode and presentation time stamps to account for a rollover\n * of the 33 bit value.\n */\n'use strict';\n\nvar Stream = require('../utils/stream');\n\nvar MAX_TS = 8589934592;\nvar RO_THRESH = 4294967296;\nvar TYPE_SHARED = 'shared';\n\nvar handleRollover = function handleRollover(value, reference) {\n  var direction = 1;\n\n  if (value > reference) {\n    // If the current timestamp value is greater than our reference timestamp and we detect a\n    // timestamp rollover, this means the roll over is happening in the opposite direction.\n    // Example scenario: Enter a long stream/video just after a rollover occurred. The reference\n    // point will be set to a small number, e.g. 1. The user then seeks backwards over the\n    // rollover point. In loading this segment, the timestamp values will be very large,\n    // e.g. 2^33 - 1. Since this comes before the data we loaded previously, we want to adjust\n    // the time stamp to be `value - 2^33`.\n    direction = -1;\n  } // Note: A seek forwards or back that is greater than the RO_THRESH (2^32, ~13 hours) will\n  // cause an incorrect adjustment.\n\n\n  while (Math.abs(reference - value) > RO_THRESH) {\n    value += direction * MAX_TS;\n  }\n\n  return value;\n};\n\nvar TimestampRolloverStream = function TimestampRolloverStream(type) {\n  var lastDTS, referenceDTS;\n  TimestampRolloverStream.prototype.init.call(this); // The \"shared\" type is used in cases where a stream will contain muxed\n  // video and audio. We could use `undefined` here, but having a string\n  // makes debugging a little clearer.\n\n  this.type_ = type || TYPE_SHARED;\n\n  this.push = function (data) {\n    // Any \"shared\" rollover streams will accept _all_ data. Otherwise,\n    // streams will only accept data that matches their type.\n    if (this.type_ !== TYPE_SHARED && data.type !== this.type_) {\n      return;\n    }\n\n    if (referenceDTS === undefined) {\n      referenceDTS = data.dts;\n    }\n\n    data.dts = handleRollover(data.dts, referenceDTS);\n    data.pts = handleRollover(data.pts, referenceDTS);\n    lastDTS = data.dts;\n    this.trigger('data', data);\n  };\n\n  this.flush = function () {\n    referenceDTS = lastDTS;\n    this.trigger('done');\n  };\n\n  this.endTimeline = function () {\n    this.flush();\n    this.trigger('endedtimeline');\n  };\n\n  this.discontinuity = function () {\n    referenceDTS = void 0;\n    lastDTS = void 0;\n  };\n\n  this.reset = function () {\n    this.discontinuity();\n    this.trigger('reset');\n  };\n};\n\nTimestampRolloverStream.prototype = new Stream();\nmodule.exports = {\n  TimestampRolloverStream: TimestampRolloverStream,\n  handleRollover: handleRollover\n};","/**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Utilities to detect basic properties and metadata about TS Segments.\n */\n'use strict';\n\nvar StreamTypes = require('./stream-types.js');\n\nvar parsePid = function parsePid(packet) {\n  var pid = packet[1] & 0x1f;\n  pid <<= 8;\n  pid |= packet[2];\n  return pid;\n};\n\nvar parsePayloadUnitStartIndicator = function parsePayloadUnitStartIndicator(packet) {\n  return !!(packet[1] & 0x40);\n};\n\nvar parseAdaptionField = function parseAdaptionField(packet) {\n  var offset = 0; // if an adaption field is present, its length is specified by the\n  // fifth byte of the TS packet header. The adaptation field is\n  // used to add stuffing to PES packets that don't fill a complete\n  // TS packet, and to specify some forms of timing and control data\n  // that we do not currently use.\n\n  if ((packet[3] & 0x30) >>> 4 > 0x01) {\n    offset += packet[4] + 1;\n  }\n\n  return offset;\n};\n\nvar parseType = function parseType(packet, pmtPid) {\n  var pid = parsePid(packet);\n\n  if (pid === 0) {\n    return 'pat';\n  } else if (pid === pmtPid) {\n    return 'pmt';\n  } else if (pmtPid) {\n    return 'pes';\n  }\n\n  return null;\n};\n\nvar parsePat = function parsePat(packet) {\n  var pusi = parsePayloadUnitStartIndicator(packet);\n  var offset = 4 + parseAdaptionField(packet);\n\n  if (pusi) {\n    offset += packet[offset] + 1;\n  }\n\n  return (packet[offset + 10] & 0x1f) << 8 | packet[offset + 11];\n};\n\nvar parsePmt = function parsePmt(packet) {\n  var programMapTable = {};\n  var pusi = parsePayloadUnitStartIndicator(packet);\n  var payloadOffset = 4 + parseAdaptionField(packet);\n\n  if (pusi) {\n    payloadOffset += packet[payloadOffset] + 1;\n  } // PMTs can be sent ahead of the time when they should actually\n  // take effect. We don't believe this should ever be the case\n  // for HLS but we'll ignore \"forward\" PMT declarations if we see\n  // them. Future PMT declarations have the current_next_indicator\n  // set to zero.\n\n\n  if (!(packet[payloadOffset + 5] & 0x01)) {\n    return;\n  }\n\n  var sectionLength, tableEnd, programInfoLength; // the mapping table ends at the end of the current section\n\n  sectionLength = (packet[payloadOffset + 1] & 0x0f) << 8 | packet[payloadOffset + 2];\n  tableEnd = 3 + sectionLength - 4; // to determine where the table is, we have to figure out how\n  // long the program info descriptors are\n\n  programInfoLength = (packet[payloadOffset + 10] & 0x0f) << 8 | packet[payloadOffset + 11]; // advance the offset to the first entry in the mapping table\n\n  var offset = 12 + programInfoLength;\n\n  while (offset < tableEnd) {\n    var i = payloadOffset + offset; // add an entry that maps the elementary_pid to the stream_type\n\n    programMapTable[(packet[i + 1] & 0x1F) << 8 | packet[i + 2]] = packet[i]; // move to the next table entry\n    // skip past the elementary stream descriptors, if present\n\n    offset += ((packet[i + 3] & 0x0F) << 8 | packet[i + 4]) + 5;\n  }\n\n  return programMapTable;\n};\n\nvar parsePesType = function parsePesType(packet, programMapTable) {\n  var pid = parsePid(packet);\n  var type = programMapTable[pid];\n\n  switch (type) {\n    case StreamTypes.H264_STREAM_TYPE:\n      return 'video';\n\n    case StreamTypes.ADTS_STREAM_TYPE:\n      return 'audio';\n\n    case StreamTypes.METADATA_STREAM_TYPE:\n      return 'timed-metadata';\n\n    default:\n      return null;\n  }\n};\n\nvar parsePesTime = function parsePesTime(packet) {\n  var pusi = parsePayloadUnitStartIndicator(packet);\n\n  if (!pusi) {\n    return null;\n  }\n\n  var offset = 4 + parseAdaptionField(packet);\n\n  if (offset >= packet.byteLength) {\n    // From the H 222.0 MPEG-TS spec\n    // \"For transport stream packets carrying PES packets, stuffing is needed when there\n    //  is insufficient PES packet data to completely fill the transport stream packet\n    //  payload bytes. Stuffing is accomplished by defining an adaptation field longer than\n    //  the sum of the lengths of the data elements in it, so that the payload bytes\n    //  remaining after the adaptation field exactly accommodates the available PES packet\n    //  data.\"\n    //\n    // If the offset is >= the length of the packet, then the packet contains no data\n    // and instead is just adaption field stuffing bytes\n    return null;\n  }\n\n  var pes = null;\n  var ptsDtsFlags; // PES packets may be annotated with a PTS value, or a PTS value\n  // and a DTS value. Determine what combination of values is\n  // available to work with.\n\n  ptsDtsFlags = packet[offset + 7]; // PTS and DTS are normally stored as a 33-bit number.  Javascript\n  // performs all bitwise operations on 32-bit integers but javascript\n  // supports a much greater range (52-bits) of integer using standard\n  // mathematical operations.\n  // We construct a 31-bit value using bitwise operators over the 31\n  // most significant bits and then multiply by 4 (equal to a left-shift\n  // of 2) before we add the final 2 least significant bits of the\n  // timestamp (equal to an OR.)\n\n  if (ptsDtsFlags & 0xC0) {\n    pes = {}; // the PTS and DTS are not written out directly. For information\n    // on how they are encoded, see\n    // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html\n\n    pes.pts = (packet[offset + 9] & 0x0E) << 27 | (packet[offset + 10] & 0xFF) << 20 | (packet[offset + 11] & 0xFE) << 12 | (packet[offset + 12] & 0xFF) << 5 | (packet[offset + 13] & 0xFE) >>> 3;\n    pes.pts *= 4; // Left shift by 2\n\n    pes.pts += (packet[offset + 13] & 0x06) >>> 1; // OR by the two LSBs\n\n    pes.dts = pes.pts;\n\n    if (ptsDtsFlags & 0x40) {\n      pes.dts = (packet[offset + 14] & 0x0E) << 27 | (packet[offset + 15] & 0xFF) << 20 | (packet[offset + 16] & 0xFE) << 12 | (packet[offset + 17] & 0xFF) << 5 | (packet[offset + 18] & 0xFE) >>> 3;\n      pes.dts *= 4; // Left shift by 2\n\n      pes.dts += (packet[offset + 18] & 0x06) >>> 1; // OR by the two LSBs\n    }\n  }\n\n  return pes;\n};\n\nvar parseNalUnitType = function parseNalUnitType(type) {\n  switch (type) {\n    case 0x05:\n      return 'slice_layer_without_partitioning_rbsp_idr';\n\n    case 0x06:\n      return 'sei_rbsp';\n\n    case 0x07:\n      return 'seq_parameter_set_rbsp';\n\n    case 0x08:\n      return 'pic_parameter_set_rbsp';\n\n    case 0x09:\n      return 'access_unit_delimiter_rbsp';\n\n    default:\n      return null;\n  }\n};\n\nvar videoPacketContainsKeyFrame = function videoPacketContainsKeyFrame(packet) {\n  var offset = 4 + parseAdaptionField(packet);\n  var frameBuffer = packet.subarray(offset);\n  var frameI = 0;\n  var frameSyncPoint = 0;\n  var foundKeyFrame = false;\n  var nalType; // advance the sync point to a NAL start, if necessary\n\n  for (; frameSyncPoint < frameBuffer.byteLength - 3; frameSyncPoint++) {\n    if (frameBuffer[frameSyncPoint + 2] === 1) {\n      // the sync point is properly aligned\n      frameI = frameSyncPoint + 5;\n      break;\n    }\n  }\n\n  while (frameI < frameBuffer.byteLength) {\n    // look at the current byte to determine if we've hit the end of\n    // a NAL unit boundary\n    switch (frameBuffer[frameI]) {\n      case 0:\n        // skip past non-sync sequences\n        if (frameBuffer[frameI - 1] !== 0) {\n          frameI += 2;\n          break;\n        } else if (frameBuffer[frameI - 2] !== 0) {\n          frameI++;\n          break;\n        }\n\n        if (frameSyncPoint + 3 !== frameI - 2) {\n          nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n\n          if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n            foundKeyFrame = true;\n          }\n        } // drop trailing zeroes\n\n\n        do {\n          frameI++;\n        } while (frameBuffer[frameI] !== 1 && frameI < frameBuffer.length);\n\n        frameSyncPoint = frameI - 2;\n        frameI += 3;\n        break;\n\n      case 1:\n        // skip past non-sync sequences\n        if (frameBuffer[frameI - 1] !== 0 || frameBuffer[frameI - 2] !== 0) {\n          frameI += 3;\n          break;\n        }\n\n        nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n\n        if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n          foundKeyFrame = true;\n        }\n\n        frameSyncPoint = frameI - 2;\n        frameI += 3;\n        break;\n\n      default:\n        // the current byte isn't a one or zero, so it cannot be part\n        // of a sync sequence\n        frameI += 3;\n        break;\n    }\n  }\n\n  frameBuffer = frameBuffer.subarray(frameSyncPoint);\n  frameI -= frameSyncPoint;\n  frameSyncPoint = 0; // parse the final nal\n\n  if (frameBuffer && frameBuffer.byteLength > 3) {\n    nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n\n    if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n      foundKeyFrame = true;\n    }\n  }\n\n  return foundKeyFrame;\n};\n\nmodule.exports = {\n  parseType: parseType,\n  parsePat: parsePat,\n  parsePmt: parsePmt,\n  parsePayloadUnitStartIndicator: parsePayloadUnitStartIndicator,\n  parsePesType: parsePesType,\n  parsePesTime: parsePesTime,\n  videoPacketContainsKeyFrame: videoPacketContainsKeyFrame\n};","/**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n *\n * Utilities to detect basic properties and metadata about Aac data.\n */\n'use strict';\n\nvar ADTS_SAMPLING_FREQUENCIES = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];\n\nvar isLikelyAacData = function isLikelyAacData(data) {\n  if (data[0] === 'I'.charCodeAt(0) && data[1] === 'D'.charCodeAt(0) && data[2] === '3'.charCodeAt(0)) {\n    return true;\n  }\n\n  return false;\n};\n\nvar parseSyncSafeInteger = function parseSyncSafeInteger(data) {\n  return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];\n}; // return a percent-encoded representation of the specified byte range\n// @see http://en.wikipedia.org/wiki/Percent-encoding\n\n\nvar percentEncode = function percentEncode(bytes, start, end) {\n  var i,\n      result = '';\n\n  for (i = start; i < end; i++) {\n    result += '%' + ('00' + bytes[i].toString(16)).slice(-2);\n  }\n\n  return result;\n}; // return the string representation of the specified byte range,\n// interpreted as ISO-8859-1.\n\n\nvar parseIso88591 = function parseIso88591(bytes, start, end) {\n  return unescape(percentEncode(bytes, start, end)); // jshint ignore:line\n};\n\nvar parseId3TagSize = function parseId3TagSize(header, byteIndex) {\n  var returnSize = header[byteIndex + 6] << 21 | header[byteIndex + 7] << 14 | header[byteIndex + 8] << 7 | header[byteIndex + 9],\n      flags = header[byteIndex + 5],\n      footerPresent = (flags & 16) >> 4;\n\n  if (footerPresent) {\n    return returnSize + 20;\n  }\n\n  return returnSize + 10;\n};\n\nvar parseAdtsSize = function parseAdtsSize(header, byteIndex) {\n  var lowThree = (header[byteIndex + 5] & 0xE0) >> 5,\n      middle = header[byteIndex + 4] << 3,\n      highTwo = header[byteIndex + 3] & 0x3 << 11;\n  return highTwo | middle | lowThree;\n};\n\nvar parseType = function parseType(header, byteIndex) {\n  if (header[byteIndex] === 'I'.charCodeAt(0) && header[byteIndex + 1] === 'D'.charCodeAt(0) && header[byteIndex + 2] === '3'.charCodeAt(0)) {\n    return 'timed-metadata';\n  } else if (header[byteIndex] & 0xff === 0xff && (header[byteIndex + 1] & 0xf0) === 0xf0) {\n    return 'audio';\n  }\n\n  return null;\n};\n\nvar parseSampleRate = function parseSampleRate(packet) {\n  var i = 0;\n\n  while (i + 5 < packet.length) {\n    if (packet[i] !== 0xFF || (packet[i + 1] & 0xF6) !== 0xF0) {\n      // If a valid header was not found,  jump one forward and attempt to\n      // find a valid ADTS header starting at the next byte\n      i++;\n      continue;\n    }\n\n    return ADTS_SAMPLING_FREQUENCIES[(packet[i + 2] & 0x3c) >>> 2];\n  }\n\n  return null;\n};\n\nvar parseAacTimestamp = function parseAacTimestamp(packet) {\n  var frameStart, frameSize, frame, frameHeader; // find the start of the first frame and the end of the tag\n\n  frameStart = 10;\n\n  if (packet[5] & 0x40) {\n    // advance the frame start past the extended header\n    frameStart += 4; // header size field\n\n    frameStart += parseSyncSafeInteger(packet.subarray(10, 14));\n  } // parse one or more ID3 frames\n  // http://id3.org/id3v2.3.0#ID3v2_frame_overview\n\n\n  do {\n    // determine the number of bytes in this frame\n    frameSize = parseSyncSafeInteger(packet.subarray(frameStart + 4, frameStart + 8));\n\n    if (frameSize < 1) {\n      return null;\n    }\n\n    frameHeader = String.fromCharCode(packet[frameStart], packet[frameStart + 1], packet[frameStart + 2], packet[frameStart + 3]);\n\n    if (frameHeader === 'PRIV') {\n      frame = packet.subarray(frameStart + 10, frameStart + frameSize + 10);\n\n      for (var i = 0; i < frame.byteLength; i++) {\n        if (frame[i] === 0) {\n          var owner = parseIso88591(frame, 0, i);\n\n          if (owner === 'com.apple.streaming.transportStreamTimestamp') {\n            var d = frame.subarray(i + 1);\n            var size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;\n            size *= 4;\n            size += d[7] & 0x03;\n            return size;\n          }\n\n          break;\n        }\n      }\n    }\n\n    frameStart += 10; // advance past the frame header\n\n    frameStart += frameSize; // advance past the frame body\n  } while (frameStart < packet.byteLength);\n\n  return null;\n};\n\nmodule.exports = {\n  isLikelyAacData: isLikelyAacData,\n  parseId3TagSize: parseId3TagSize,\n  parseAdtsSize: parseAdtsSize,\n  parseType: parseType,\n  parseSampleRate: parseSampleRate,\n  parseAacTimestamp: parseAacTimestamp\n};","/**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n */\nvar ONE_SECOND_IN_TS = 90000,\n    // 90kHz clock\nsecondsToVideoTs,\n    secondsToAudioTs,\n    videoTsToSeconds,\n    audioTsToSeconds,\n    audioTsToVideoTs,\n    videoTsToAudioTs,\n    metadataTsToSeconds;\n\nsecondsToVideoTs = function secondsToVideoTs(seconds) {\n  return seconds * ONE_SECOND_IN_TS;\n};\n\nsecondsToAudioTs = function secondsToAudioTs(seconds, sampleRate) {\n  return seconds * sampleRate;\n};\n\nvideoTsToSeconds = function videoTsToSeconds(timestamp) {\n  return timestamp / ONE_SECOND_IN_TS;\n};\n\naudioTsToSeconds = function audioTsToSeconds(timestamp, sampleRate) {\n  return timestamp / sampleRate;\n};\n\naudioTsToVideoTs = function audioTsToVideoTs(timestamp, sampleRate) {\n  return secondsToVideoTs(audioTsToSeconds(timestamp, sampleRate));\n};\n\nvideoTsToAudioTs = function videoTsToAudioTs(timestamp, sampleRate) {\n  return secondsToAudioTs(videoTsToSeconds(timestamp), sampleRate);\n};\n/**\n * Adjust ID3 tag or caption timing information by the timeline pts values\n * (if keepOriginalTimestamps is false) and convert to seconds\n */\n\n\nmetadataTsToSeconds = function metadataTsToSeconds(timestamp, timelineStartPts, keepOriginalTimestamps) {\n  return videoTsToSeconds(keepOriginalTimestamps ? timestamp : timestamp - timelineStartPts);\n};\n\nmodule.exports = {\n  ONE_SECOND_IN_TS: ONE_SECOND_IN_TS,\n  secondsToVideoTs: secondsToVideoTs,\n  secondsToAudioTs: secondsToAudioTs,\n  videoTsToSeconds: videoTsToSeconds,\n  audioTsToSeconds: audioTsToSeconds,\n  audioTsToVideoTs: audioTsToVideoTs,\n  videoTsToAudioTs: videoTsToAudioTs,\n  metadataTsToSeconds: metadataTsToSeconds\n};","/**\n * Module dependencies.\n */\nvar url = require('./url');\n\nvar parser = require('socket.io-parser');\n\nvar Manager = require('./manager');\n\nvar debug = require('debug')('socket.io-client');\n/**\n * Module exports.\n */\n\n\nmodule.exports = exports = lookup;\n/**\n * Managers cache.\n */\n\nvar cache = exports.managers = {};\n/**\n * Looks up an existing `Manager` for multiplexing.\n * If the user summons:\n *\n *   `io('http://localhost/a');`\n *   `io('http://localhost/b');`\n *\n * We reuse the existing instance based on same scheme/port/host,\n * and we initialize sockets for each namespace.\n *\n * @api public\n */\n\nfunction lookup(uri, opts) {\n  if (typeof uri === 'object') {\n    opts = uri;\n    uri = undefined;\n  }\n\n  opts = opts || {};\n  var parsed = url(uri);\n  var source = parsed.source;\n  var id = parsed.id;\n  var path = parsed.path;\n  var sameNamespace = cache[id] && path in cache[id].nsps;\n  var newConnection = opts.forceNew || opts['force new connection'] || false === opts.multiplex || sameNamespace;\n  var io;\n\n  if (newConnection) {\n    debug('ignoring socket cache for %s', source);\n    io = Manager(source, opts);\n  } else {\n    if (!cache[id]) {\n      debug('new io instance for %s', source);\n      cache[id] = Manager(source, opts);\n    }\n\n    io = cache[id];\n  }\n\n  if (parsed.query && !opts.query) {\n    opts.query = parsed.query;\n  }\n\n  return io.socket(parsed.path, opts);\n}\n/**\n * Protocol version.\n *\n * @api public\n */\n\n\nexports.protocol = parser.protocol;\n/**\n * `connect`.\n *\n * @param {String} uri\n * @api public\n */\n\nexports.connect = lookup;\n/**\n * Expose constructors for standalone build.\n *\n * @api public\n */\n\nexports.Manager = require('./manager');\nexports.Socket = require('./socket');","/**\n * Module dependencies.\n */\nvar parseuri = require('parseuri');\n\nvar debug = require('debug')('socket.io-client:url');\n/**\n * Module exports.\n */\n\n\nmodule.exports = url;\n/**\n * URL parser.\n *\n * @param {String} url\n * @param {Object} An object meant to mimic window.location.\n *                 Defaults to window.location.\n * @api public\n */\n\nfunction url(uri, loc) {\n  var obj = uri; // default to window.location\n\n  loc = loc || typeof location !== 'undefined' && location;\n  if (null == uri) uri = loc.protocol + '//' + loc.host; // relative path support\n\n  if ('string' === typeof uri) {\n    if ('/' === uri.charAt(0)) {\n      if ('/' === uri.charAt(1)) {\n        uri = loc.protocol + uri;\n      } else {\n        uri = loc.host + uri;\n      }\n    }\n\n    if (!/^(https?|wss?):\\/\\//.test(uri)) {\n      debug('protocol-less url %s', uri);\n\n      if ('undefined' !== typeof loc) {\n        uri = loc.protocol + '//' + uri;\n      } else {\n        uri = 'https://' + uri;\n      }\n    } // parse\n\n\n    debug('parse %s', uri);\n    obj = parseuri(uri);\n  } // make sure we treat `localhost:80` and `localhost` equally\n\n\n  if (!obj.port) {\n    if (/^(http|ws)$/.test(obj.protocol)) {\n      obj.port = '80';\n    } else if (/^(http|ws)s$/.test(obj.protocol)) {\n      obj.port = '443';\n    }\n  }\n\n  obj.path = obj.path || '/';\n  var ipv6 = obj.host.indexOf(':') !== -1;\n  var host = ipv6 ? '[' + obj.host + ']' : obj.host; // define unique id\n\n  obj.id = obj.protocol + '://' + host + ':' + obj.port; // define href\n\n  obj.href = obj.protocol + '://' + host + (loc && loc.port === obj.port ? '' : ':' + obj.port);\n  return obj;\n}","/**\n * This is the common logic for both the Node.js and web browser\n * implementations of `debug()`.\n *\n * Expose `debug()` as the module.\n */\nexports = module.exports = createDebug.debug = createDebug['default'] = createDebug;\nexports.coerce = coerce;\nexports.disable = disable;\nexports.enable = enable;\nexports.enabled = enabled;\nexports.humanize = require('ms');\n/**\n * Active `debug` instances.\n */\n\nexports.instances = [];\n/**\n * The currently active debug mode names, and names to skip.\n */\n\nexports.names = [];\nexports.skips = [];\n/**\n * Map of special \"%n\" handling functions, for the debug \"format\" argument.\n *\n * Valid key names are a single, lower or upper-case letter, i.e. \"n\" and \"N\".\n */\n\nexports.formatters = {};\n/**\n * Select a color.\n * @param {String} namespace\n * @return {Number}\n * @api private\n */\n\nfunction selectColor(namespace) {\n  var hash = 0,\n      i;\n\n  for (i in namespace) {\n    hash = (hash << 5) - hash + namespace.charCodeAt(i);\n    hash |= 0; // Convert to 32bit integer\n  }\n\n  return exports.colors[Math.abs(hash) % exports.colors.length];\n}\n/**\n * Create a debugger with the given `namespace`.\n *\n * @param {String} namespace\n * @return {Function}\n * @api public\n */\n\n\nfunction createDebug(namespace) {\n  var prevTime;\n\n  function debug() {\n    // disabled?\n    if (!debug.enabled) return;\n    var self = debug; // set `diff` timestamp\n\n    var curr = +new Date();\n    var ms = curr - (prevTime || curr);\n    self.diff = ms;\n    self.prev = prevTime;\n    self.curr = curr;\n    prevTime = curr; // turn the `arguments` into a proper Array\n\n    var args = new Array(arguments.length);\n\n    for (var i = 0; i < args.length; i++) {\n      args[i] = arguments[i];\n    }\n\n    args[0] = exports.coerce(args[0]);\n\n    if ('string' !== typeof args[0]) {\n      // anything else let's inspect with %O\n      args.unshift('%O');\n    } // apply any `formatters` transformations\n\n\n    var index = 0;\n    args[0] = args[0].replace(/%([a-zA-Z%])/g, function (match, format) {\n      // if we encounter an escaped % then don't increase the array index\n      if (match === '%%') return match;\n      index++;\n      var formatter = exports.formatters[format];\n\n      if ('function' === typeof formatter) {\n        var val = args[index];\n        match = formatter.call(self, val); // now we need to remove `args[index]` since it's inlined in the `format`\n\n        args.splice(index, 1);\n        index--;\n      }\n\n      return match;\n    }); // apply env-specific formatting (colors, etc.)\n\n    exports.formatArgs.call(self, args);\n    var logFn = debug.log || exports.log || console.log.bind(console);\n    logFn.apply(self, args);\n  }\n\n  debug.namespace = namespace;\n  debug.enabled = exports.enabled(namespace);\n  debug.useColors = exports.useColors();\n  debug.color = selectColor(namespace);\n  debug.destroy = destroy; // env-specific initialization logic for debug instances\n\n  if ('function' === typeof exports.init) {\n    exports.init(debug);\n  }\n\n  exports.instances.push(debug);\n  return debug;\n}\n\nfunction destroy() {\n  var index = exports.instances.indexOf(this);\n\n  if (index !== -1) {\n    exports.instances.splice(index, 1);\n    return true;\n  } else {\n    return false;\n  }\n}\n/**\n * Enables a debug mode by namespaces. This can include modes\n * separated by a colon and wildcards.\n *\n * @param {String} namespaces\n * @api public\n */\n\n\nfunction enable(namespaces) {\n  exports.save(namespaces);\n  exports.names = [];\n  exports.skips = [];\n  var i;\n  var split = (typeof namespaces === 'string' ? namespaces : '').split(/[\\s,]+/);\n  var len = split.length;\n\n  for (i = 0; i < len; i++) {\n    if (!split[i]) continue; // ignore empty strings\n\n    namespaces = split[i].replace(/\\*/g, '.*?');\n\n    if (namespaces[0] === '-') {\n      exports.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));\n    } else {\n      exports.names.push(new RegExp('^' + namespaces + '$'));\n    }\n  }\n\n  for (i = 0; i < exports.instances.length; i++) {\n    var instance = exports.instances[i];\n    instance.enabled = exports.enabled(instance.namespace);\n  }\n}\n/**\n * Disable debug output.\n *\n * @api public\n */\n\n\nfunction disable() {\n  exports.enable('');\n}\n/**\n * Returns true if the given mode name is enabled, false otherwise.\n *\n * @param {String} name\n * @return {Boolean}\n * @api public\n */\n\n\nfunction enabled(name) {\n  if (name[name.length - 1] === '*') {\n    return true;\n  }\n\n  var i, len;\n\n  for (i = 0, len = exports.skips.length; i < len; i++) {\n    if (exports.skips[i].test(name)) {\n      return false;\n    }\n  }\n\n  for (i = 0, len = exports.names.length; i < len; i++) {\n    if (exports.names[i].test(name)) {\n      return true;\n    }\n  }\n\n  return false;\n}\n/**\n * Coerce `val`.\n *\n * @param {Mixed} val\n * @return {Mixed}\n * @api private\n */\n\n\nfunction coerce(val) {\n  if (val instanceof Error) return val.stack || val.message;\n  return val;\n}","/**\n * This is the web browser implementation of `debug()`.\n *\n * Expose `debug()` as the module.\n */\nexports = module.exports = require('./debug');\nexports.log = log;\nexports.formatArgs = formatArgs;\nexports.save = save;\nexports.load = load;\nexports.useColors = useColors;\nexports.storage = 'undefined' != typeof chrome && 'undefined' != typeof chrome.storage ? chrome.storage.local : localstorage();\n/**\n * Colors.\n */\n\nexports.colors = ['#0000CC', '#0000FF', '#0033CC', '#0033FF', '#0066CC', '#0066FF', '#0099CC', '#0099FF', '#00CC00', '#00CC33', '#00CC66', '#00CC99', '#00CCCC', '#00CCFF', '#3300CC', '#3300FF', '#3333CC', '#3333FF', '#3366CC', '#3366FF', '#3399CC', '#3399FF', '#33CC00', '#33CC33', '#33CC66', '#33CC99', '#33CCCC', '#33CCFF', '#6600CC', '#6600FF', '#6633CC', '#6633FF', '#66CC00', '#66CC33', '#9900CC', '#9900FF', '#9933CC', '#9933FF', '#99CC00', '#99CC33', '#CC0000', '#CC0033', '#CC0066', '#CC0099', '#CC00CC', '#CC00FF', '#CC3300', '#CC3333', '#CC3366', '#CC3399', '#CC33CC', '#CC33FF', '#CC6600', '#CC6633', '#CC9900', '#CC9933', '#CCCC00', '#CCCC33', '#FF0000', '#FF0033', '#FF0066', '#FF0099', '#FF00CC', '#FF00FF', '#FF3300', '#FF3333', '#FF3366', '#FF3399', '#FF33CC', '#FF33FF', '#FF6600', '#FF6633', '#FF9900', '#FF9933', '#FFCC00', '#FFCC33'];\n/**\n * Currently only WebKit-based Web Inspectors, Firefox >= v31,\n * and the Firebug extension (any Firefox version) are known\n * to support \"%c\" CSS customizations.\n *\n * TODO: add a `localStorage` variable to explicitly enable/disable colors\n */\n\nfunction useColors() {\n  // NB: In an Electron preload script, document will be defined but not fully\n  // initialized. Since we know we're in Chrome, we'll just detect this case\n  // explicitly\n  if (typeof window !== 'undefined' && window.process && window.process.type === 'renderer') {\n    return true;\n  } // Internet Explorer and Edge do not support colors.\n\n\n  if (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/(edge|trident)\\/(\\d+)/)) {\n    return false;\n  } // is webkit? http://stackoverflow.com/a/16459606/376773\n  // document is undefined in react-native: https://github.com/facebook/react-native/pull/1632\n\n\n  return typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance || // is firebug? http://stackoverflow.com/a/398120/376773\n  typeof window !== 'undefined' && window.console && (window.console.firebug || window.console.exception && window.console.table) || // is firefox >= v31?\n  // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages\n  typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\\/(\\d+)/) && parseInt(RegExp.$1, 10) >= 31 || // double check webkit in userAgent just in case we are in a worker\n  typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\\/(\\d+)/);\n}\n/**\n * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.\n */\n\n\nexports.formatters.j = function (v) {\n  try {\n    return JSON.stringify(v);\n  } catch (err) {\n    return '[UnexpectedJSONParseError]: ' + err.message;\n  }\n};\n/**\n * Colorize log arguments if enabled.\n *\n * @api public\n */\n\n\nfunction formatArgs(args) {\n  var useColors = this.useColors;\n  args[0] = (useColors ? '%c' : '') + this.namespace + (useColors ? ' %c' : ' ') + args[0] + (useColors ? '%c ' : ' ') + '+' + exports.humanize(this.diff);\n  if (!useColors) return;\n  var c = 'color: ' + this.color;\n  args.splice(1, 0, c, 'color: inherit'); // the final \"%c\" is somewhat tricky, because there could be other\n  // arguments passed either before or after the %c, so we need to\n  // figure out the correct index to insert the CSS into\n\n  var index = 0;\n  var lastC = 0;\n  args[0].replace(/%[a-zA-Z%]/g, function (match) {\n    if ('%%' === match) return;\n    index++;\n\n    if ('%c' === match) {\n      // we only are interested in the *last* %c\n      // (the user may have provided their own)\n      lastC = index;\n    }\n  });\n  args.splice(lastC, 0, c);\n}\n/**\n * Invokes `console.log()` when available.\n * No-op when `console.log` is not a \"function\".\n *\n * @api public\n */\n\n\nfunction log() {\n  // this hackery is required for IE8/9, where\n  // the `console.log` function doesn't have 'apply'\n  return 'object' === typeof console && console.log && Function.prototype.apply.call(console.log, console, arguments);\n}\n/**\n * Save `namespaces`.\n *\n * @param {String} namespaces\n * @api private\n */\n\n\nfunction save(namespaces) {\n  try {\n    if (null == namespaces) {\n      exports.storage.removeItem('debug');\n    } else {\n      exports.storage.debug = namespaces;\n    }\n  } catch (e) {}\n}\n/**\n * Load `namespaces`.\n *\n * @return {String} returns the previously persisted debug modes\n * @api private\n */\n\n\nfunction load() {\n  var r;\n\n  try {\n    r = exports.storage.debug;\n  } catch (e) {} // If debug isn't set in LS, and we're in Electron, try to load $DEBUG\n\n\n  if (!r && typeof process !== 'undefined' && 'env' in process) {\n    r = process.env.DEBUG;\n  }\n\n  return r;\n}\n/**\n * Enable namespaces listed in `localStorage.debug` initially.\n */\n\n\nexports.enable(load());\n/**\n * Localstorage attempts to return the localstorage.\n *\n * This is necessary because safari throws\n * when a user disables cookies/localstorage\n * and you attempt to access it.\n *\n * @return {LocalStorage}\n * @api private\n */\n\nfunction localstorage() {\n  try {\n    return window.localStorage;\n  } catch (e) {}\n}","/**\n * This is the common logic for both the Node.js and web browser\n * implementations of `debug()`.\n *\n * Expose `debug()` as the module.\n */\nexports = module.exports = createDebug.debug = createDebug['default'] = createDebug;\nexports.coerce = coerce;\nexports.disable = disable;\nexports.enable = enable;\nexports.enabled = enabled;\nexports.humanize = require('ms');\n/**\n * Active `debug` instances.\n */\n\nexports.instances = [];\n/**\n * The currently active debug mode names, and names to skip.\n */\n\nexports.names = [];\nexports.skips = [];\n/**\n * Map of special \"%n\" handling functions, for the debug \"format\" argument.\n *\n * Valid key names are a single, lower or upper-case letter, i.e. \"n\" and \"N\".\n */\n\nexports.formatters = {};\n/**\n * Select a color.\n * @param {String} namespace\n * @return {Number}\n * @api private\n */\n\nfunction selectColor(namespace) {\n  var hash = 0,\n      i;\n\n  for (i in namespace) {\n    hash = (hash << 5) - hash + namespace.charCodeAt(i);\n    hash |= 0; // Convert to 32bit integer\n  }\n\n  return exports.colors[Math.abs(hash) % exports.colors.length];\n}\n/**\n * Create a debugger with the given `namespace`.\n *\n * @param {String} namespace\n * @return {Function}\n * @api public\n */\n\n\nfunction createDebug(namespace) {\n  var prevTime;\n\n  function debug() {\n    // disabled?\n    if (!debug.enabled) return;\n    var self = debug; // set `diff` timestamp\n\n    var curr = +new Date();\n    var ms = curr - (prevTime || curr);\n    self.diff = ms;\n    self.prev = prevTime;\n    self.curr = curr;\n    prevTime = curr; // turn the `arguments` into a proper Array\n\n    var args = new Array(arguments.length);\n\n    for (var i = 0; i < args.length; i++) {\n      args[i] = arguments[i];\n    }\n\n    args[0] = exports.coerce(args[0]);\n\n    if ('string' !== typeof args[0]) {\n      // anything else let's inspect with %O\n      args.unshift('%O');\n    } // apply any `formatters` transformations\n\n\n    var index = 0;\n    args[0] = args[0].replace(/%([a-zA-Z%])/g, function (match, format) {\n      // if we encounter an escaped % then don't increase the array index\n      if (match === '%%') return match;\n      index++;\n      var formatter = exports.formatters[format];\n\n      if ('function' === typeof formatter) {\n        var val = args[index];\n        match = formatter.call(self, val); // now we need to remove `args[index]` since it's inlined in the `format`\n\n        args.splice(index, 1);\n        index--;\n      }\n\n      return match;\n    }); // apply env-specific formatting (colors, etc.)\n\n    exports.formatArgs.call(self, args);\n    var logFn = debug.log || exports.log || console.log.bind(console);\n    logFn.apply(self, args);\n  }\n\n  debug.namespace = namespace;\n  debug.enabled = exports.enabled(namespace);\n  debug.useColors = exports.useColors();\n  debug.color = selectColor(namespace);\n  debug.destroy = destroy; // env-specific initialization logic for debug instances\n\n  if ('function' === typeof exports.init) {\n    exports.init(debug);\n  }\n\n  exports.instances.push(debug);\n  return debug;\n}\n\nfunction destroy() {\n  var index = exports.instances.indexOf(this);\n\n  if (index !== -1) {\n    exports.instances.splice(index, 1);\n    return true;\n  } else {\n    return false;\n  }\n}\n/**\n * Enables a debug mode by namespaces. This can include modes\n * separated by a colon and wildcards.\n *\n * @param {String} namespaces\n * @api public\n */\n\n\nfunction enable(namespaces) {\n  exports.save(namespaces);\n  exports.names = [];\n  exports.skips = [];\n  var i;\n  var split = (typeof namespaces === 'string' ? namespaces : '').split(/[\\s,]+/);\n  var len = split.length;\n\n  for (i = 0; i < len; i++) {\n    if (!split[i]) continue; // ignore empty strings\n\n    namespaces = split[i].replace(/\\*/g, '.*?');\n\n    if (namespaces[0] === '-') {\n      exports.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));\n    } else {\n      exports.names.push(new RegExp('^' + namespaces + '$'));\n    }\n  }\n\n  for (i = 0; i < exports.instances.length; i++) {\n    var instance = exports.instances[i];\n    instance.enabled = exports.enabled(instance.namespace);\n  }\n}\n/**\n * Disable debug output.\n *\n * @api public\n */\n\n\nfunction disable() {\n  exports.enable('');\n}\n/**\n * Returns true if the given mode name is enabled, false otherwise.\n *\n * @param {String} name\n * @return {Boolean}\n * @api public\n */\n\n\nfunction enabled(name) {\n  if (name[name.length - 1] === '*') {\n    return true;\n  }\n\n  var i, len;\n\n  for (i = 0, len = exports.skips.length; i < len; i++) {\n    if (exports.skips[i].test(name)) {\n      return false;\n    }\n  }\n\n  for (i = 0, len = exports.names.length; i < len; i++) {\n    if (exports.names[i].test(name)) {\n      return true;\n    }\n  }\n\n  return false;\n}\n/**\n * Coerce `val`.\n *\n * @param {Mixed} val\n * @return {Mixed}\n * @api private\n */\n\n\nfunction coerce(val) {\n  if (val instanceof Error) return val.stack || val.message;\n  return val;\n}","/*global Blob,File*/\n\n/**\n * Module requirements\n */\nvar isArray = require('isarray');\n\nvar isBuf = require('./is-buffer');\n\nvar toString = Object.prototype.toString;\nvar withNativeBlob = typeof Blob === 'function' || typeof Blob !== 'undefined' && toString.call(Blob) === '[object BlobConstructor]';\nvar withNativeFile = typeof File === 'function' || typeof File !== 'undefined' && toString.call(File) === '[object FileConstructor]';\n/**\n * Replaces every Buffer | ArrayBuffer in packet with a numbered placeholder.\n * Anything with blobs or files should be fed through removeBlobs before coming\n * here.\n *\n * @param {Object} packet - socket.io event packet\n * @return {Object} with deconstructed packet and list of buffers\n * @api public\n */\n\nexports.deconstructPacket = function (packet) {\n  var buffers = [];\n  var packetData = packet.data;\n  var pack = packet;\n  pack.data = _deconstructPacket(packetData, buffers);\n  pack.attachments = buffers.length; // number of binary 'attachments'\n\n  return {\n    packet: pack,\n    buffers: buffers\n  };\n};\n\nfunction _deconstructPacket(data, buffers) {\n  if (!data) return data;\n\n  if (isBuf(data)) {\n    var placeholder = {\n      _placeholder: true,\n      num: buffers.length\n    };\n    buffers.push(data);\n    return placeholder;\n  } else if (isArray(data)) {\n    var newData = new Array(data.length);\n\n    for (var i = 0; i < data.length; i++) {\n      newData[i] = _deconstructPacket(data[i], buffers);\n    }\n\n    return newData;\n  } else if (typeof data === 'object' && !(data instanceof Date)) {\n    var newData = {};\n\n    for (var key in data) {\n      newData[key] = _deconstructPacket(data[key], buffers);\n    }\n\n    return newData;\n  }\n\n  return data;\n}\n/**\n * Reconstructs a binary packet from its placeholder packet and buffers\n *\n * @param {Object} packet - event packet with placeholders\n * @param {Array} buffers - binary buffers to put in placeholder positions\n * @return {Object} reconstructed packet\n * @api public\n */\n\n\nexports.reconstructPacket = function (packet, buffers) {\n  packet.data = _reconstructPacket(packet.data, buffers);\n  packet.attachments = undefined; // no longer useful\n\n  return packet;\n};\n\nfunction _reconstructPacket(data, buffers) {\n  if (!data) return data;\n\n  if (data && data._placeholder) {\n    return buffers[data.num]; // appropriate buffer (should be natural order anyway)\n  } else if (isArray(data)) {\n    for (var i = 0; i < data.length; i++) {\n      data[i] = _reconstructPacket(data[i], buffers);\n    }\n  } else if (typeof data === 'object') {\n    for (var key in data) {\n      data[key] = _reconstructPacket(data[key], buffers);\n    }\n  }\n\n  return data;\n}\n/**\n * Asynchronously removes Blobs or Files from data via\n * FileReader's readAsArrayBuffer method. Used before encoding\n * data as msgpack. Calls callback with the blobless data.\n *\n * @param {Object} data\n * @param {Function} callback\n * @api private\n */\n\n\nexports.removeBlobs = function (data, callback) {\n  function _removeBlobs(obj, curKey, containingObject) {\n    if (!obj) return obj; // convert any blob\n\n    if (withNativeBlob && obj instanceof Blob || withNativeFile && obj instanceof File) {\n      pendingBlobs++; // async filereader\n\n      var fileReader = new FileReader();\n\n      fileReader.onload = function () {\n        // this.result == arraybuffer\n        if (containingObject) {\n          containingObject[curKey] = this.result;\n        } else {\n          bloblessData = this.result;\n        } // if nothing pending its callback time\n\n\n        if (! --pendingBlobs) {\n          callback(bloblessData);\n        }\n      };\n\n      fileReader.readAsArrayBuffer(obj); // blob -> arraybuffer\n    } else if (isArray(obj)) {\n      // handle array\n      for (var i = 0; i < obj.length; i++) {\n        _removeBlobs(obj[i], i, obj);\n      }\n    } else if (typeof obj === 'object' && !isBuf(obj)) {\n      // and object\n      for (var key in obj) {\n        _removeBlobs(obj[key], key, obj);\n      }\n    }\n  }\n\n  var pendingBlobs = 0;\n  var bloblessData = data;\n\n  _removeBlobs(bloblessData);\n\n  if (!pendingBlobs) {\n    callback(bloblessData);\n  }\n};","'use strict';\n\nexports.byteLength = byteLength;\nexports.toByteArray = toByteArray;\nexports.fromByteArray = fromByteArray;\nvar lookup = [];\nvar revLookup = [];\nvar Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array;\nvar code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';\n\nfor (var i = 0, len = code.length; i < len; ++i) {\n  lookup[i] = code[i];\n  revLookup[code.charCodeAt(i)] = i;\n} // Support decoding URL-safe base64 strings, as Node.js does.\n// See: https://en.wikipedia.org/wiki/Base64#URL_applications\n\n\nrevLookup['-'.charCodeAt(0)] = 62;\nrevLookup['_'.charCodeAt(0)] = 63;\n\nfunction getLens(b64) {\n  var len = b64.length;\n\n  if (len % 4 > 0) {\n    throw new Error('Invalid string. Length must be a multiple of 4');\n  } // Trim off extra bytes after placeholder bytes are found\n  // See: https://github.com/beatgammit/base64-js/issues/42\n\n\n  var validLen = b64.indexOf('=');\n  if (validLen === -1) validLen = len;\n  var placeHoldersLen = validLen === len ? 0 : 4 - validLen % 4;\n  return [validLen, placeHoldersLen];\n} // base64 is 4/3 + up to two characters of the original data\n\n\nfunction byteLength(b64) {\n  var lens = getLens(b64);\n  var validLen = lens[0];\n  var placeHoldersLen = lens[1];\n  return (validLen + placeHoldersLen) * 3 / 4 - placeHoldersLen;\n}\n\nfunction _byteLength(b64, validLen, placeHoldersLen) {\n  return (validLen + placeHoldersLen) * 3 / 4 - placeHoldersLen;\n}\n\nfunction toByteArray(b64) {\n  var tmp;\n  var lens = getLens(b64);\n  var validLen = lens[0];\n  var placeHoldersLen = lens[1];\n  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen));\n  var curByte = 0; // if there are placeholders, only get up to the last complete 4 chars\n\n  var len = placeHoldersLen > 0 ? validLen - 4 : validLen;\n\n  for (var i = 0; i < len; i += 4) {\n    tmp = revLookup[b64.charCodeAt(i)] << 18 | revLookup[b64.charCodeAt(i + 1)] << 12 | revLookup[b64.charCodeAt(i + 2)] << 6 | revLookup[b64.charCodeAt(i + 3)];\n    arr[curByte++] = tmp >> 16 & 0xFF;\n    arr[curByte++] = tmp >> 8 & 0xFF;\n    arr[curByte++] = tmp & 0xFF;\n  }\n\n  if (placeHoldersLen === 2) {\n    tmp = revLookup[b64.charCodeAt(i)] << 2 | revLookup[b64.charCodeAt(i + 1)] >> 4;\n    arr[curByte++] = tmp & 0xFF;\n  }\n\n  if (placeHoldersLen === 1) {\n    tmp = revLookup[b64.charCodeAt(i)] << 10 | revLookup[b64.charCodeAt(i + 1)] << 4 | revLookup[b64.charCodeAt(i + 2)] >> 2;\n    arr[curByte++] = tmp >> 8 & 0xFF;\n    arr[curByte++] = tmp & 0xFF;\n  }\n\n  return arr;\n}\n\nfunction tripletToBase64(num) {\n  return lookup[num >> 18 & 0x3F] + lookup[num >> 12 & 0x3F] + lookup[num >> 6 & 0x3F] + lookup[num & 0x3F];\n}\n\nfunction encodeChunk(uint8, start, end) {\n  var tmp;\n  var output = [];\n\n  for (var i = start; i < end; i += 3) {\n    tmp = (uint8[i] << 16 & 0xFF0000) + (uint8[i + 1] << 8 & 0xFF00) + (uint8[i + 2] & 0xFF);\n    output.push(tripletToBase64(tmp));\n  }\n\n  return output.join('');\n}\n\nfunction fromByteArray(uint8) {\n  var tmp;\n  var len = uint8.length;\n  var extraBytes = len % 3; // if we have 1 byte left, pad 2 bytes\n\n  var parts = [];\n  var maxChunkLength = 16383; // must be multiple of 3\n  // go through the array every three bytes, we'll deal with trailing stuff later\n\n  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {\n    parts.push(encodeChunk(uint8, i, i + maxChunkLength > len2 ? len2 : i + maxChunkLength));\n  } // pad the end with zeros, but make sure to not forget the extra bytes\n\n\n  if (extraBytes === 1) {\n    tmp = uint8[len - 1];\n    parts.push(lookup[tmp >> 2] + lookup[tmp << 4 & 0x3F] + '==');\n  } else if (extraBytes === 2) {\n    tmp = (uint8[len - 2] << 8) + uint8[len - 1];\n    parts.push(lookup[tmp >> 10] + lookup[tmp >> 4 & 0x3F] + lookup[tmp << 2 & 0x3F] + '=');\n  }\n\n  return parts.join('');\n}","exports.read = function (buffer, offset, isLE, mLen, nBytes) {\n  var e, m;\n  var eLen = nBytes * 8 - mLen - 1;\n  var eMax = (1 << eLen) - 1;\n  var eBias = eMax >> 1;\n  var nBits = -7;\n  var i = isLE ? nBytes - 1 : 0;\n  var d = isLE ? -1 : 1;\n  var s = buffer[offset + i];\n  i += d;\n  e = s & (1 << -nBits) - 1;\n  s >>= -nBits;\n  nBits += eLen;\n\n  for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}\n\n  m = e & (1 << -nBits) - 1;\n  e >>= -nBits;\n  nBits += mLen;\n\n  for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}\n\n  if (e === 0) {\n    e = 1 - eBias;\n  } else if (e === eMax) {\n    return m ? NaN : (s ? -1 : 1) * Infinity;\n  } else {\n    m = m + Math.pow(2, mLen);\n    e = e - eBias;\n  }\n\n  return (s ? -1 : 1) * m * Math.pow(2, e - mLen);\n};\n\nexports.write = function (buffer, value, offset, isLE, mLen, nBytes) {\n  var e, m, c;\n  var eLen = nBytes * 8 - mLen - 1;\n  var eMax = (1 << eLen) - 1;\n  var eBias = eMax >> 1;\n  var rt = mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0;\n  var i = isLE ? 0 : nBytes - 1;\n  var d = isLE ? 1 : -1;\n  var s = value < 0 || value === 0 && 1 / value < 0 ? 1 : 0;\n  value = Math.abs(value);\n\n  if (isNaN(value) || value === Infinity) {\n    m = isNaN(value) ? 1 : 0;\n    e = eMax;\n  } else {\n    e = Math.floor(Math.log(value) / Math.LN2);\n\n    if (value * (c = Math.pow(2, -e)) < 1) {\n      e--;\n      c *= 2;\n    }\n\n    if (e + eBias >= 1) {\n      value += rt / c;\n    } else {\n      value += rt * Math.pow(2, 1 - eBias);\n    }\n\n    if (value * c >= 2) {\n      e++;\n      c /= 2;\n    }\n\n    if (e + eBias >= eMax) {\n      m = 0;\n      e = eMax;\n    } else if (e + eBias >= 1) {\n      m = (value * c - 1) * Math.pow(2, mLen);\n      e = e + eBias;\n    } else {\n      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);\n      e = 0;\n    }\n  }\n\n  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}\n\n  e = e << mLen | m;\n  eLen += mLen;\n\n  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}\n\n  buffer[offset + i - d] |= s * 128;\n};","var toString = {}.toString;\n\nmodule.exports = Array.isArray || function (arr) {\n  return toString.call(arr) == '[object Array]';\n};","module.exports = require('./socket');\n/**\n * Exports parser\n *\n * @api public\n *\n */\n\nmodule.exports.parser = require('engine.io-parser');","/**\n * Module dependencies.\n */\nvar transports = require('./transports/index');\n\nvar Emitter = require('component-emitter');\n\nvar debug = require('debug')('engine.io-client:socket');\n\nvar index = require('indexof');\n\nvar parser = require('engine.io-parser');\n\nvar parseuri = require('parseuri');\n\nvar parseqs = require('parseqs');\n/**\n * Module exports.\n */\n\n\nmodule.exports = Socket;\n/**\n * Socket constructor.\n *\n * @param {String|Object} uri or options\n * @param {Object} options\n * @api public\n */\n\nfunction Socket(uri, opts) {\n  if (!(this instanceof Socket)) return new Socket(uri, opts);\n  opts = opts || {};\n\n  if (uri && 'object' === typeof uri) {\n    opts = uri;\n    uri = null;\n  }\n\n  if (uri) {\n    uri = parseuri(uri);\n    opts.hostname = uri.host;\n    opts.secure = uri.protocol === 'https' || uri.protocol === 'wss';\n    opts.port = uri.port;\n    if (uri.query) opts.query = uri.query;\n  } else if (opts.host) {\n    opts.hostname = parseuri(opts.host).host;\n  }\n\n  this.secure = null != opts.secure ? opts.secure : typeof location !== 'undefined' && 'https:' === location.protocol;\n\n  if (opts.hostname && !opts.port) {\n    // if no port is specified manually, use the protocol default\n    opts.port = this.secure ? '443' : '80';\n  }\n\n  this.agent = opts.agent || false;\n  this.hostname = opts.hostname || (typeof location !== 'undefined' ? location.hostname : 'localhost');\n  this.port = opts.port || (typeof location !== 'undefined' && location.port ? location.port : this.secure ? 443 : 80);\n  this.query = opts.query || {};\n  if ('string' === typeof this.query) this.query = parseqs.decode(this.query);\n  this.upgrade = false !== opts.upgrade;\n  this.path = (opts.path || '/engine.io').replace(/\\/$/, '') + '/';\n  this.forceJSONP = !!opts.forceJSONP;\n  this.jsonp = false !== opts.jsonp;\n  this.forceBase64 = !!opts.forceBase64;\n  this.enablesXDR = !!opts.enablesXDR;\n  this.timestampParam = opts.timestampParam || 't';\n  this.timestampRequests = opts.timestampRequests;\n  this.transports = opts.transports || ['polling', 'websocket'];\n  this.transportOptions = opts.transportOptions || {};\n  this.readyState = '';\n  this.writeBuffer = [];\n  this.prevBufferLen = 0;\n  this.policyPort = opts.policyPort || 843;\n  this.rememberUpgrade = opts.rememberUpgrade || false;\n  this.binaryType = null;\n  this.onlyBinaryUpgrades = opts.onlyBinaryUpgrades;\n  this.perMessageDeflate = false !== opts.perMessageDeflate ? opts.perMessageDeflate || {} : false;\n  if (true === this.perMessageDeflate) this.perMessageDeflate = {};\n\n  if (this.perMessageDeflate && null == this.perMessageDeflate.threshold) {\n    this.perMessageDeflate.threshold = 1024;\n  } // SSL options for Node.js client\n\n\n  this.pfx = opts.pfx || null;\n  this.key = opts.key || null;\n  this.passphrase = opts.passphrase || null;\n  this.cert = opts.cert || null;\n  this.ca = opts.ca || null;\n  this.ciphers = opts.ciphers || null;\n  this.rejectUnauthorized = opts.rejectUnauthorized === undefined ? true : opts.rejectUnauthorized;\n  this.forceNode = !!opts.forceNode; // detect ReactNative environment\n\n  this.isReactNative = typeof navigator !== 'undefined' && typeof navigator.product === 'string' && navigator.product.toLowerCase() === 'reactnative'; // other options for Node.js or ReactNative client\n\n  if (typeof self === 'undefined' || this.isReactNative) {\n    if (opts.extraHeaders && Object.keys(opts.extraHeaders).length > 0) {\n      this.extraHeaders = opts.extraHeaders;\n    }\n\n    if (opts.localAddress) {\n      this.localAddress = opts.localAddress;\n    }\n  } // set on handshake\n\n\n  this.id = null;\n  this.upgrades = null;\n  this.pingInterval = null;\n  this.pingTimeout = null; // set on heartbeat\n\n  this.pingIntervalTimer = null;\n  this.pingTimeoutTimer = null;\n  this.open();\n}\n\nSocket.priorWebsocketSuccess = false;\n/**\n * Mix in `Emitter`.\n */\n\nEmitter(Socket.prototype);\n/**\n * Protocol version.\n *\n * @api public\n */\n\nSocket.protocol = parser.protocol; // this is an int\n\n/**\n * Expose deps for legacy compatibility\n * and standalone browser access.\n */\n\nSocket.Socket = Socket;\nSocket.Transport = require('./transport');\nSocket.transports = require('./transports/index');\nSocket.parser = require('engine.io-parser');\n/**\n * Creates transport of the given type.\n *\n * @param {String} transport name\n * @return {Transport}\n * @api private\n */\n\nSocket.prototype.createTransport = function (name) {\n  debug('creating transport \"%s\"', name);\n  var query = clone(this.query); // append engine.io protocol identifier\n\n  query.EIO = parser.protocol; // transport name\n\n  query.transport = name; // per-transport options\n\n  var options = this.transportOptions[name] || {}; // session id if we already have one\n\n  if (this.id) query.sid = this.id;\n  var transport = new transports[name]({\n    query: query,\n    socket: this,\n    agent: options.agent || this.agent,\n    hostname: options.hostname || this.hostname,\n    port: options.port || this.port,\n    secure: options.secure || this.secure,\n    path: options.path || this.path,\n    forceJSONP: options.forceJSONP || this.forceJSONP,\n    jsonp: options.jsonp || this.jsonp,\n    forceBase64: options.forceBase64 || this.forceBase64,\n    enablesXDR: options.enablesXDR || this.enablesXDR,\n    timestampRequests: options.timestampRequests || this.timestampRequests,\n    timestampParam: options.timestampParam || this.timestampParam,\n    policyPort: options.policyPort || this.policyPort,\n    pfx: options.pfx || this.pfx,\n    key: options.key || this.key,\n    passphrase: options.passphrase || this.passphrase,\n    cert: options.cert || this.cert,\n    ca: options.ca || this.ca,\n    ciphers: options.ciphers || this.ciphers,\n    rejectUnauthorized: options.rejectUnauthorized || this.rejectUnauthorized,\n    perMessageDeflate: options.perMessageDeflate || this.perMessageDeflate,\n    extraHeaders: options.extraHeaders || this.extraHeaders,\n    forceNode: options.forceNode || this.forceNode,\n    localAddress: options.localAddress || this.localAddress,\n    requestTimeout: options.requestTimeout || this.requestTimeout,\n    protocols: options.protocols || void 0,\n    isReactNative: this.isReactNative\n  });\n  return transport;\n};\n\nfunction clone(obj) {\n  var o = {};\n\n  for (var i in obj) {\n    if (obj.hasOwnProperty(i)) {\n      o[i] = obj[i];\n    }\n  }\n\n  return o;\n}\n/**\n * Initializes transport to use and starts probe.\n *\n * @api private\n */\n\n\nSocket.prototype.open = function () {\n  var transport;\n\n  if (this.rememberUpgrade && Socket.priorWebsocketSuccess && this.transports.indexOf('websocket') !== -1) {\n    transport = 'websocket';\n  } else if (0 === this.transports.length) {\n    // Emit error on next tick so it can be listened to\n    var self = this;\n    setTimeout(function () {\n      self.emit('error', 'No transports available');\n    }, 0);\n    return;\n  } else {\n    transport = this.transports[0];\n  }\n\n  this.readyState = 'opening'; // Retry with the next transport if the transport is disabled (jsonp: false)\n\n  try {\n    transport = this.createTransport(transport);\n  } catch (e) {\n    this.transports.shift();\n    this.open();\n    return;\n  }\n\n  transport.open();\n  this.setTransport(transport);\n};\n/**\n * Sets the current transport. Disables the existing one (if any).\n *\n * @api private\n */\n\n\nSocket.prototype.setTransport = function (transport) {\n  debug('setting transport %s', transport.name);\n  var self = this;\n\n  if (this.transport) {\n    debug('clearing existing transport %s', this.transport.name);\n    this.transport.removeAllListeners();\n  } // set up transport\n\n\n  this.transport = transport; // set up transport listeners\n\n  transport.on('drain', function () {\n    self.onDrain();\n  }).on('packet', function (packet) {\n    self.onPacket(packet);\n  }).on('error', function (e) {\n    self.onError(e);\n  }).on('close', function () {\n    self.onClose('transport close');\n  });\n};\n/**\n * Probes a transport.\n *\n * @param {String} transport name\n * @api private\n */\n\n\nSocket.prototype.probe = function (name) {\n  debug('probing transport \"%s\"', name);\n  var transport = this.createTransport(name, {\n    probe: 1\n  });\n  var failed = false;\n  var self = this;\n  Socket.priorWebsocketSuccess = false;\n\n  function onTransportOpen() {\n    if (self.onlyBinaryUpgrades) {\n      var upgradeLosesBinary = !this.supportsBinary && self.transport.supportsBinary;\n      failed = failed || upgradeLosesBinary;\n    }\n\n    if (failed) return;\n    debug('probe transport \"%s\" opened', name);\n    transport.send([{\n      type: 'ping',\n      data: 'probe'\n    }]);\n    transport.once('packet', function (msg) {\n      if (failed) return;\n\n      if ('pong' === msg.type && 'probe' === msg.data) {\n        debug('probe transport \"%s\" pong', name);\n        self.upgrading = true;\n        self.emit('upgrading', transport);\n        if (!transport) return;\n        Socket.priorWebsocketSuccess = 'websocket' === transport.name;\n        debug('pausing current transport \"%s\"', self.transport.name);\n        self.transport.pause(function () {\n          if (failed) return;\n          if ('closed' === self.readyState) return;\n          debug('changing transport and sending upgrade packet');\n          cleanup();\n          self.setTransport(transport);\n          transport.send([{\n            type: 'upgrade'\n          }]);\n          self.emit('upgrade', transport);\n          transport = null;\n          self.upgrading = false;\n          self.flush();\n        });\n      } else {\n        debug('probe transport \"%s\" failed', name);\n        var err = new Error('probe error');\n        err.transport = transport.name;\n        self.emit('upgradeError', err);\n      }\n    });\n  }\n\n  function freezeTransport() {\n    if (failed) return; // Any callback called by transport should be ignored since now\n\n    failed = true;\n    cleanup();\n    transport.close();\n    transport = null;\n  } // Handle any error that happens while probing\n\n\n  function onerror(err) {\n    var error = new Error('probe error: ' + err);\n    error.transport = transport.name;\n    freezeTransport();\n    debug('probe transport \"%s\" failed because of error: %s', name, err);\n    self.emit('upgradeError', error);\n  }\n\n  function onTransportClose() {\n    onerror('transport closed');\n  } // When the socket is closed while we're probing\n\n\n  function onclose() {\n    onerror('socket closed');\n  } // When the socket is upgraded while we're probing\n\n\n  function onupgrade(to) {\n    if (transport && to.name !== transport.name) {\n      debug('\"%s\" works - aborting \"%s\"', to.name, transport.name);\n      freezeTransport();\n    }\n  } // Remove all listeners on the transport and on self\n\n\n  function cleanup() {\n    transport.removeListener('open', onTransportOpen);\n    transport.removeListener('error', onerror);\n    transport.removeListener('close', onTransportClose);\n    self.removeListener('close', onclose);\n    self.removeListener('upgrading', onupgrade);\n  }\n\n  transport.once('open', onTransportOpen);\n  transport.once('error', onerror);\n  transport.once('close', onTransportClose);\n  this.once('close', onclose);\n  this.once('upgrading', onupgrade);\n  transport.open();\n};\n/**\n * Called when connection is deemed open.\n *\n * @api public\n */\n\n\nSocket.prototype.onOpen = function () {\n  debug('socket open');\n  this.readyState = 'open';\n  Socket.priorWebsocketSuccess = 'websocket' === this.transport.name;\n  this.emit('open');\n  this.flush(); // we check for `readyState` in case an `open`\n  // listener already closed the socket\n\n  if ('open' === this.readyState && this.upgrade && this.transport.pause) {\n    debug('starting upgrade probes');\n\n    for (var i = 0, l = this.upgrades.length; i < l; i++) {\n      this.probe(this.upgrades[i]);\n    }\n  }\n};\n/**\n * Handles a packet.\n *\n * @api private\n */\n\n\nSocket.prototype.onPacket = function (packet) {\n  if ('opening' === this.readyState || 'open' === this.readyState || 'closing' === this.readyState) {\n    debug('socket receive: type \"%s\", data \"%s\"', packet.type, packet.data);\n    this.emit('packet', packet); // Socket is live - any packet counts\n\n    this.emit('heartbeat');\n\n    switch (packet.type) {\n      case 'open':\n        this.onHandshake(JSON.parse(packet.data));\n        break;\n\n      case 'pong':\n        this.setPing();\n        this.emit('pong');\n        break;\n\n      case 'error':\n        var err = new Error('server error');\n        err.code = packet.data;\n        this.onError(err);\n        break;\n\n      case 'message':\n        this.emit('data', packet.data);\n        this.emit('message', packet.data);\n        break;\n    }\n  } else {\n    debug('packet received with socket readyState \"%s\"', this.readyState);\n  }\n};\n/**\n * Called upon handshake completion.\n *\n * @param {Object} handshake obj\n * @api private\n */\n\n\nSocket.prototype.onHandshake = function (data) {\n  this.emit('handshake', data);\n  this.id = data.sid;\n  this.transport.query.sid = data.sid;\n  this.upgrades = this.filterUpgrades(data.upgrades);\n  this.pingInterval = data.pingInterval;\n  this.pingTimeout = data.pingTimeout;\n  this.onOpen(); // In case open handler closes socket\n\n  if ('closed' === this.readyState) return;\n  this.setPing(); // Prolong liveness of socket on heartbeat\n\n  this.removeListener('heartbeat', this.onHeartbeat);\n  this.on('heartbeat', this.onHeartbeat);\n};\n/**\n * Resets ping timeout.\n *\n * @api private\n */\n\n\nSocket.prototype.onHeartbeat = function (timeout) {\n  clearTimeout(this.pingTimeoutTimer);\n  var self = this;\n  self.pingTimeoutTimer = setTimeout(function () {\n    if ('closed' === self.readyState) return;\n    self.onClose('ping timeout');\n  }, timeout || self.pingInterval + self.pingTimeout);\n};\n/**\n * Pings server every `this.pingInterval` and expects response\n * within `this.pingTimeout` or closes connection.\n *\n * @api private\n */\n\n\nSocket.prototype.setPing = function () {\n  var self = this;\n  clearTimeout(self.pingIntervalTimer);\n  self.pingIntervalTimer = setTimeout(function () {\n    debug('writing ping packet - expecting pong within %sms', self.pingTimeout);\n    self.ping();\n    self.onHeartbeat(self.pingTimeout);\n  }, self.pingInterval);\n};\n/**\n* Sends a ping packet.\n*\n* @api private\n*/\n\n\nSocket.prototype.ping = function () {\n  var self = this;\n  this.sendPacket('ping', function () {\n    self.emit('ping');\n  });\n};\n/**\n * Called on `drain` event\n *\n * @api private\n */\n\n\nSocket.prototype.onDrain = function () {\n  this.writeBuffer.splice(0, this.prevBufferLen); // setting prevBufferLen = 0 is very important\n  // for example, when upgrading, upgrade packet is sent over,\n  // and a nonzero prevBufferLen could cause problems on `drain`\n\n  this.prevBufferLen = 0;\n\n  if (0 === this.writeBuffer.length) {\n    this.emit('drain');\n  } else {\n    this.flush();\n  }\n};\n/**\n * Flush write buffers.\n *\n * @api private\n */\n\n\nSocket.prototype.flush = function () {\n  if ('closed' !== this.readyState && this.transport.writable && !this.upgrading && this.writeBuffer.length) {\n    debug('flushing %d packets in socket', this.writeBuffer.length);\n    this.transport.send(this.writeBuffer); // keep track of current length of writeBuffer\n    // splice writeBuffer and callbackBuffer on `drain`\n\n    this.prevBufferLen = this.writeBuffer.length;\n    this.emit('flush');\n  }\n};\n/**\n * Sends a message.\n *\n * @param {String} message.\n * @param {Function} callback function.\n * @param {Object} options.\n * @return {Socket} for chaining.\n * @api public\n */\n\n\nSocket.prototype.write = Socket.prototype.send = function (msg, options, fn) {\n  this.sendPacket('message', msg, options, fn);\n  return this;\n};\n/**\n * Sends a packet.\n *\n * @param {String} packet type.\n * @param {String} data.\n * @param {Object} options.\n * @param {Function} callback function.\n * @api private\n */\n\n\nSocket.prototype.sendPacket = function (type, data, options, fn) {\n  if ('function' === typeof data) {\n    fn = data;\n    data = undefined;\n  }\n\n  if ('function' === typeof options) {\n    fn = options;\n    options = null;\n  }\n\n  if ('closing' === this.readyState || 'closed' === this.readyState) {\n    return;\n  }\n\n  options = options || {};\n  options.compress = false !== options.compress;\n  var packet = {\n    type: type,\n    data: data,\n    options: options\n  };\n  this.emit('packetCreate', packet);\n  this.writeBuffer.push(packet);\n  if (fn) this.once('flush', fn);\n  this.flush();\n};\n/**\n * Closes the connection.\n *\n * @api private\n */\n\n\nSocket.prototype.close = function () {\n  if ('opening' === this.readyState || 'open' === this.readyState) {\n    this.readyState = 'closing';\n    var self = this;\n\n    if (this.writeBuffer.length) {\n      this.once('drain', function () {\n        if (this.upgrading) {\n          waitForUpgrade();\n        } else {\n          close();\n        }\n      });\n    } else if (this.upgrading) {\n      waitForUpgrade();\n    } else {\n      close();\n    }\n  }\n\n  function close() {\n    self.onClose('forced close');\n    debug('socket closing - telling transport to close');\n    self.transport.close();\n  }\n\n  function cleanupAndClose() {\n    self.removeListener('upgrade', cleanupAndClose);\n    self.removeListener('upgradeError', cleanupAndClose);\n    close();\n  }\n\n  function waitForUpgrade() {\n    // wait for upgrade to finish since we can't send packets while pausing a transport\n    self.once('upgrade', cleanupAndClose);\n    self.once('upgradeError', cleanupAndClose);\n  }\n\n  return this;\n};\n/**\n * Called upon transport error\n *\n * @api private\n */\n\n\nSocket.prototype.onError = function (err) {\n  debug('socket error %j', err);\n  Socket.priorWebsocketSuccess = false;\n  this.emit('error', err);\n  this.onClose('transport error', err);\n};\n/**\n * Called upon transport close.\n *\n * @api private\n */\n\n\nSocket.prototype.onClose = function (reason, desc) {\n  if ('opening' === this.readyState || 'open' === this.readyState || 'closing' === this.readyState) {\n    debug('socket close with reason: \"%s\"', reason);\n    var self = this; // clear timers\n\n    clearTimeout(this.pingIntervalTimer);\n    clearTimeout(this.pingTimeoutTimer); // stop event from firing again for transport\n\n    this.transport.removeAllListeners('close'); // ensure transport won't stay open\n\n    this.transport.close(); // ignore further transport communication\n\n    this.transport.removeAllListeners(); // set ready state\n\n    this.readyState = 'closed'; // clear session id\n\n    this.id = null; // emit close event\n\n    this.emit('close', reason, desc); // clean buffers after, so users can still\n    // grab the buffers on `close` event\n\n    self.writeBuffer = [];\n    self.prevBufferLen = 0;\n  }\n};\n/**\n * Filters upgrades, returning only those matching client transports.\n *\n * @param {Array} server upgrades\n * @api private\n *\n */\n\n\nSocket.prototype.filterUpgrades = function (upgrades) {\n  var filteredUpgrades = [];\n\n  for (var i = 0, j = upgrades.length; i < j; i++) {\n    if (~index(this.transports, upgrades[i])) filteredUpgrades.push(upgrades[i]);\n  }\n\n  return filteredUpgrades;\n};","/**\n * Module exports.\n *\n * Logic borrowed from Modernizr:\n *\n *   - https://github.com/Modernizr/Modernizr/blob/master/feature-detects/cors.js\n */\ntry {\n  module.exports = typeof XMLHttpRequest !== 'undefined' && 'withCredentials' in new XMLHttpRequest();\n} catch (err) {\n  // if XMLHttp support is disabled in IE then it will throw\n  // when trying to create\n  module.exports = false;\n}","/* global attachEvent */\n\n/**\n * Module requirements.\n */\nvar XMLHttpRequest = require('xmlhttprequest-ssl');\n\nvar Polling = require('./polling');\n\nvar Emitter = require('component-emitter');\n\nvar inherit = require('component-inherit');\n\nvar debug = require('debug')('engine.io-client:polling-xhr');\n/**\n * Module exports.\n */\n\n\nmodule.exports = XHR;\nmodule.exports.Request = Request;\n/**\n * Empty function\n */\n\nfunction empty() {}\n/**\n * XHR Polling constructor.\n *\n * @param {Object} opts\n * @api public\n */\n\n\nfunction XHR(opts) {\n  Polling.call(this, opts);\n  this.requestTimeout = opts.requestTimeout;\n  this.extraHeaders = opts.extraHeaders;\n\n  if (typeof location !== 'undefined') {\n    var isSSL = 'https:' === location.protocol;\n    var port = location.port; // some user agents have empty `location.port`\n\n    if (!port) {\n      port = isSSL ? 443 : 80;\n    }\n\n    this.xd = typeof location !== 'undefined' && opts.hostname !== location.hostname || port !== opts.port;\n    this.xs = opts.secure !== isSSL;\n  }\n}\n/**\n * Inherits from Polling.\n */\n\n\ninherit(XHR, Polling);\n/**\n * XHR supports binary\n */\n\nXHR.prototype.supportsBinary = true;\n/**\n * Creates a request.\n *\n * @param {String} method\n * @api private\n */\n\nXHR.prototype.request = function (opts) {\n  opts = opts || {};\n  opts.uri = this.uri();\n  opts.xd = this.xd;\n  opts.xs = this.xs;\n  opts.agent = this.agent || false;\n  opts.supportsBinary = this.supportsBinary;\n  opts.enablesXDR = this.enablesXDR; // SSL options for Node.js client\n\n  opts.pfx = this.pfx;\n  opts.key = this.key;\n  opts.passphrase = this.passphrase;\n  opts.cert = this.cert;\n  opts.ca = this.ca;\n  opts.ciphers = this.ciphers;\n  opts.rejectUnauthorized = this.rejectUnauthorized;\n  opts.requestTimeout = this.requestTimeout; // other options for Node.js client\n\n  opts.extraHeaders = this.extraHeaders;\n  return new Request(opts);\n};\n/**\n * Sends data.\n *\n * @param {String} data to send.\n * @param {Function} called upon flush.\n * @api private\n */\n\n\nXHR.prototype.doWrite = function (data, fn) {\n  var isBinary = typeof data !== 'string' && data !== undefined;\n  var req = this.request({\n    method: 'POST',\n    data: data,\n    isBinary: isBinary\n  });\n  var self = this;\n  req.on('success', fn);\n  req.on('error', function (err) {\n    self.onError('xhr post error', err);\n  });\n  this.sendXhr = req;\n};\n/**\n * Starts a poll cycle.\n *\n * @api private\n */\n\n\nXHR.prototype.doPoll = function () {\n  debug('xhr poll');\n  var req = this.request();\n  var self = this;\n  req.on('data', function (data) {\n    self.onData(data);\n  });\n  req.on('error', function (err) {\n    self.onError('xhr poll error', err);\n  });\n  this.pollXhr = req;\n};\n/**\n * Request constructor\n *\n * @param {Object} options\n * @api public\n */\n\n\nfunction Request(opts) {\n  this.method = opts.method || 'GET';\n  this.uri = opts.uri;\n  this.xd = !!opts.xd;\n  this.xs = !!opts.xs;\n  this.async = false !== opts.async;\n  this.data = undefined !== opts.data ? opts.data : null;\n  this.agent = opts.agent;\n  this.isBinary = opts.isBinary;\n  this.supportsBinary = opts.supportsBinary;\n  this.enablesXDR = opts.enablesXDR;\n  this.requestTimeout = opts.requestTimeout; // SSL options for Node.js client\n\n  this.pfx = opts.pfx;\n  this.key = opts.key;\n  this.passphrase = opts.passphrase;\n  this.cert = opts.cert;\n  this.ca = opts.ca;\n  this.ciphers = opts.ciphers;\n  this.rejectUnauthorized = opts.rejectUnauthorized; // other options for Node.js client\n\n  this.extraHeaders = opts.extraHeaders;\n  this.create();\n}\n/**\n * Mix in `Emitter`.\n */\n\n\nEmitter(Request.prototype);\n/**\n * Creates the XHR object and sends the request.\n *\n * @api private\n */\n\nRequest.prototype.create = function () {\n  var opts = {\n    agent: this.agent,\n    xdomain: this.xd,\n    xscheme: this.xs,\n    enablesXDR: this.enablesXDR\n  }; // SSL options for Node.js client\n\n  opts.pfx = this.pfx;\n  opts.key = this.key;\n  opts.passphrase = this.passphrase;\n  opts.cert = this.cert;\n  opts.ca = this.ca;\n  opts.ciphers = this.ciphers;\n  opts.rejectUnauthorized = this.rejectUnauthorized;\n  var xhr = this.xhr = new XMLHttpRequest(opts);\n  var self = this;\n\n  try {\n    debug('xhr open %s: %s', this.method, this.uri);\n    xhr.open(this.method, this.uri, this.async);\n\n    try {\n      if (this.extraHeaders) {\n        xhr.setDisableHeaderCheck && xhr.setDisableHeaderCheck(true);\n\n        for (var i in this.extraHeaders) {\n          if (this.extraHeaders.hasOwnProperty(i)) {\n            xhr.setRequestHeader(i, this.extraHeaders[i]);\n          }\n        }\n      }\n    } catch (e) {}\n\n    if ('POST' === this.method) {\n      try {\n        if (this.isBinary) {\n          xhr.setRequestHeader('Content-type', 'application/octet-stream');\n        } else {\n          xhr.setRequestHeader('Content-type', 'text/plain;charset=UTF-8');\n        }\n      } catch (e) {}\n    }\n\n    try {\n      xhr.setRequestHeader('Accept', '*/*');\n    } catch (e) {} // ie6 check\n\n\n    if ('withCredentials' in xhr) {\n      xhr.withCredentials = true;\n    }\n\n    if (this.requestTimeout) {\n      xhr.timeout = this.requestTimeout;\n    }\n\n    if (this.hasXDR()) {\n      xhr.onload = function () {\n        self.onLoad();\n      };\n\n      xhr.onerror = function () {\n        self.onError(xhr.responseText);\n      };\n    } else {\n      xhr.onreadystatechange = function () {\n        if (xhr.readyState === 2) {\n          try {\n            var contentType = xhr.getResponseHeader('Content-Type');\n\n            if (self.supportsBinary && contentType === 'application/octet-stream') {\n              xhr.responseType = 'arraybuffer';\n            }\n          } catch (e) {}\n        }\n\n        if (4 !== xhr.readyState) return;\n\n        if (200 === xhr.status || 1223 === xhr.status) {\n          self.onLoad();\n        } else {\n          // make sure the `error` event handler that's user-set\n          // does not throw in the same tick and gets caught here\n          setTimeout(function () {\n            self.onError(xhr.status);\n          }, 0);\n        }\n      };\n    }\n\n    debug('xhr data %s', this.data);\n    xhr.send(this.data);\n  } catch (e) {\n    // Need to defer since .create() is called directly fhrom the constructor\n    // and thus the 'error' event can only be only bound *after* this exception\n    // occurs.  Therefore, also, we cannot throw here at all.\n    setTimeout(function () {\n      self.onError(e);\n    }, 0);\n    return;\n  }\n\n  if (typeof document !== 'undefined') {\n    this.index = Request.requestsCount++;\n    Request.requests[this.index] = this;\n  }\n};\n/**\n * Called upon successful response.\n *\n * @api private\n */\n\n\nRequest.prototype.onSuccess = function () {\n  this.emit('success');\n  this.cleanup();\n};\n/**\n * Called if we have data.\n *\n * @api private\n */\n\n\nRequest.prototype.onData = function (data) {\n  this.emit('data', data);\n  this.onSuccess();\n};\n/**\n * Called upon error.\n *\n * @api private\n */\n\n\nRequest.prototype.onError = function (err) {\n  this.emit('error', err);\n  this.cleanup(true);\n};\n/**\n * Cleans up house.\n *\n * @api private\n */\n\n\nRequest.prototype.cleanup = function (fromError) {\n  if ('undefined' === typeof this.xhr || null === this.xhr) {\n    return;\n  } // xmlhttprequest\n\n\n  if (this.hasXDR()) {\n    this.xhr.onload = this.xhr.onerror = empty;\n  } else {\n    this.xhr.onreadystatechange = empty;\n  }\n\n  if (fromError) {\n    try {\n      this.xhr.abort();\n    } catch (e) {}\n  }\n\n  if (typeof document !== 'undefined') {\n    delete Request.requests[this.index];\n  }\n\n  this.xhr = null;\n};\n/**\n * Called upon load.\n *\n * @api private\n */\n\n\nRequest.prototype.onLoad = function () {\n  var data;\n\n  try {\n    var contentType;\n\n    try {\n      contentType = this.xhr.getResponseHeader('Content-Type');\n    } catch (e) {}\n\n    if (contentType === 'application/octet-stream') {\n      data = this.xhr.response || this.xhr.responseText;\n    } else {\n      data = this.xhr.responseText;\n    }\n  } catch (e) {\n    this.onError(e);\n  }\n\n  if (null != data) {\n    this.onData(data);\n  }\n};\n/**\n * Check if it has XDomainRequest.\n *\n * @api private\n */\n\n\nRequest.prototype.hasXDR = function () {\n  return typeof XDomainRequest !== 'undefined' && !this.xs && this.enablesXDR;\n};\n/**\n * Aborts the request.\n *\n * @api public\n */\n\n\nRequest.prototype.abort = function () {\n  this.cleanup();\n};\n/**\n * Aborts pending requests when unloading the window. This is needed to prevent\n * memory leaks (e.g. when using IE) and to ensure that no spurious error is\n * emitted.\n */\n\n\nRequest.requestsCount = 0;\nRequest.requests = {};\n\nif (typeof document !== 'undefined') {\n  if (typeof attachEvent === 'function') {\n    attachEvent('onunload', unloadHandler);\n  } else if (typeof addEventListener === 'function') {\n    var terminationEvent = 'onpagehide' in self ? 'pagehide' : 'unload';\n    addEventListener(terminationEvent, unloadHandler, false);\n  }\n}\n\nfunction unloadHandler() {\n  for (var i in Request.requests) {\n    if (Request.requests.hasOwnProperty(i)) {\n      Request.requests[i].abort();\n    }\n  }\n}","/**\n * Gets the keys for an object.\n *\n * @return {Array} keys\n * @api private\n */\nmodule.exports = Object.keys || function keys(obj) {\n  var arr = [];\n  var has = Object.prototype.hasOwnProperty;\n\n  for (var i in obj) {\n    if (has.call(obj, i)) {\n      arr.push(i);\n    }\n  }\n\n  return arr;\n};","var toString = {}.toString;\n\nmodule.exports = Array.isArray || function (arr) {\n  return toString.call(arr) == '[object Array]';\n};","/**\n * An abstraction for slicing an arraybuffer even when\n * ArrayBuffer.prototype.slice is not supported\n *\n * @api public\n */\nmodule.exports = function (arraybuffer, start, end) {\n  var bytes = arraybuffer.byteLength;\n  start = start || 0;\n  end = end || bytes;\n\n  if (arraybuffer.slice) {\n    return arraybuffer.slice(start, end);\n  }\n\n  if (start < 0) {\n    start += bytes;\n  }\n\n  if (end < 0) {\n    end += bytes;\n  }\n\n  if (end > bytes) {\n    end = bytes;\n  }\n\n  if (start >= bytes || start >= end || bytes === 0) {\n    return new ArrayBuffer(0);\n  }\n\n  var abv = new Uint8Array(arraybuffer);\n  var result = new Uint8Array(end - start);\n\n  for (var i = start, ii = 0; i < end; i++, ii++) {\n    result[ii] = abv[i];\n  }\n\n  return result.buffer;\n};","module.exports = after;\n\nfunction after(count, callback, err_cb) {\n  var bail = false;\n  err_cb = err_cb || noop;\n  proxy.count = count;\n  return count === 0 ? callback() : proxy;\n\n  function proxy(err, result) {\n    if (proxy.count <= 0) {\n      throw new Error('after called too many times');\n    }\n\n    --proxy.count; // after first error, rest are passed to err_cb\n\n    if (err) {\n      bail = true;\n      callback(err); // future error callbacks will go to error handler\n\n      callback = err_cb;\n    } else if (proxy.count === 0 && !bail) {\n      callback(null, result);\n    }\n  }\n}\n\nfunction noop() {}","/*! https://mths.be/utf8js v2.1.2 by @mathias */\nvar stringFromCharCode = String.fromCharCode; // Taken from https://mths.be/punycode\n\nfunction ucs2decode(string) {\n  var output = [];\n  var counter = 0;\n  var length = string.length;\n  var value;\n  var extra;\n\n  while (counter < length) {\n    value = string.charCodeAt(counter++);\n\n    if (value >= 0xD800 && value <= 0xDBFF && counter < length) {\n      // high surrogate, and there is a next character\n      extra = string.charCodeAt(counter++);\n\n      if ((extra & 0xFC00) == 0xDC00) {\n        // low surrogate\n        output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);\n      } else {\n        // unmatched surrogate; only append this code unit, in case the next\n        // code unit is the high surrogate of a surrogate pair\n        output.push(value);\n        counter--;\n      }\n    } else {\n      output.push(value);\n    }\n  }\n\n  return output;\n} // Taken from https://mths.be/punycode\n\n\nfunction ucs2encode(array) {\n  var length = array.length;\n  var index = -1;\n  var value;\n  var output = '';\n\n  while (++index < length) {\n    value = array[index];\n\n    if (value > 0xFFFF) {\n      value -= 0x10000;\n      output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);\n      value = 0xDC00 | value & 0x3FF;\n    }\n\n    output += stringFromCharCode(value);\n  }\n\n  return output;\n}\n\nfunction checkScalarValue(codePoint, strict) {\n  if (codePoint >= 0xD800 && codePoint <= 0xDFFF) {\n    if (strict) {\n      throw Error('Lone surrogate U+' + codePoint.toString(16).toUpperCase() + ' is not a scalar value');\n    }\n\n    return false;\n  }\n\n  return true;\n}\n/*--------------------------------------------------------------------------*/\n\n\nfunction createByte(codePoint, shift) {\n  return stringFromCharCode(codePoint >> shift & 0x3F | 0x80);\n}\n\nfunction encodeCodePoint(codePoint, strict) {\n  if ((codePoint & 0xFFFFFF80) == 0) {\n    // 1-byte sequence\n    return stringFromCharCode(codePoint);\n  }\n\n  var symbol = '';\n\n  if ((codePoint & 0xFFFFF800) == 0) {\n    // 2-byte sequence\n    symbol = stringFromCharCode(codePoint >> 6 & 0x1F | 0xC0);\n  } else if ((codePoint & 0xFFFF0000) == 0) {\n    // 3-byte sequence\n    if (!checkScalarValue(codePoint, strict)) {\n      codePoint = 0xFFFD;\n    }\n\n    symbol = stringFromCharCode(codePoint >> 12 & 0x0F | 0xE0);\n    symbol += createByte(codePoint, 6);\n  } else if ((codePoint & 0xFFE00000) == 0) {\n    // 4-byte sequence\n    symbol = stringFromCharCode(codePoint >> 18 & 0x07 | 0xF0);\n    symbol += createByte(codePoint, 12);\n    symbol += createByte(codePoint, 6);\n  }\n\n  symbol += stringFromCharCode(codePoint & 0x3F | 0x80);\n  return symbol;\n}\n\nfunction utf8encode(string, opts) {\n  opts = opts || {};\n  var strict = false !== opts.strict;\n  var codePoints = ucs2decode(string);\n  var length = codePoints.length;\n  var index = -1;\n  var codePoint;\n  var byteString = '';\n\n  while (++index < length) {\n    codePoint = codePoints[index];\n    byteString += encodeCodePoint(codePoint, strict);\n  }\n\n  return byteString;\n}\n/*--------------------------------------------------------------------------*/\n\n\nfunction readContinuationByte() {\n  if (byteIndex >= byteCount) {\n    throw Error('Invalid byte index');\n  }\n\n  var continuationByte = byteArray[byteIndex] & 0xFF;\n  byteIndex++;\n\n  if ((continuationByte & 0xC0) == 0x80) {\n    return continuationByte & 0x3F;\n  } // If we end up here, it’s not a continuation byte\n\n\n  throw Error('Invalid continuation byte');\n}\n\nfunction decodeSymbol(strict) {\n  var byte1;\n  var byte2;\n  var byte3;\n  var byte4;\n  var codePoint;\n\n  if (byteIndex > byteCount) {\n    throw Error('Invalid byte index');\n  }\n\n  if (byteIndex == byteCount) {\n    return false;\n  } // Read first byte\n\n\n  byte1 = byteArray[byteIndex] & 0xFF;\n  byteIndex++; // 1-byte sequence (no continuation bytes)\n\n  if ((byte1 & 0x80) == 0) {\n    return byte1;\n  } // 2-byte sequence\n\n\n  if ((byte1 & 0xE0) == 0xC0) {\n    byte2 = readContinuationByte();\n    codePoint = (byte1 & 0x1F) << 6 | byte2;\n\n    if (codePoint >= 0x80) {\n      return codePoint;\n    } else {\n      throw Error('Invalid continuation byte');\n    }\n  } // 3-byte sequence (may include unpaired surrogates)\n\n\n  if ((byte1 & 0xF0) == 0xE0) {\n    byte2 = readContinuationByte();\n    byte3 = readContinuationByte();\n    codePoint = (byte1 & 0x0F) << 12 | byte2 << 6 | byte3;\n\n    if (codePoint >= 0x0800) {\n      return checkScalarValue(codePoint, strict) ? codePoint : 0xFFFD;\n    } else {\n      throw Error('Invalid continuation byte');\n    }\n  } // 4-byte sequence\n\n\n  if ((byte1 & 0xF8) == 0xF0) {\n    byte2 = readContinuationByte();\n    byte3 = readContinuationByte();\n    byte4 = readContinuationByte();\n    codePoint = (byte1 & 0x07) << 0x12 | byte2 << 0x0C | byte3 << 0x06 | byte4;\n\n    if (codePoint >= 0x010000 && codePoint <= 0x10FFFF) {\n      return codePoint;\n    }\n  }\n\n  throw Error('Invalid UTF-8 detected');\n}\n\nvar byteArray;\nvar byteCount;\nvar byteIndex;\n\nfunction utf8decode(byteString, opts) {\n  opts = opts || {};\n  var strict = false !== opts.strict;\n  byteArray = ucs2decode(byteString);\n  byteCount = byteArray.length;\n  byteIndex = 0;\n  var codePoints = [];\n  var tmp;\n\n  while ((tmp = decodeSymbol(strict)) !== false) {\n    codePoints.push(tmp);\n  }\n\n  return ucs2encode(codePoints);\n}\n\nmodule.exports = {\n  version: '2.1.2',\n  encode: utf8encode,\n  decode: utf8decode\n};","/*\n * base64-arraybuffer\n * https://github.com/niklasvh/base64-arraybuffer\n *\n * Copyright (c) 2012 Niklas von Hertzen\n * Licensed under the MIT license.\n */\n(function () {\n  \"use strict\";\n\n  var chars = \"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/\"; // Use a lookup table to find the index.\n\n  var lookup = new Uint8Array(256);\n\n  for (var i = 0; i < chars.length; i++) {\n    lookup[chars.charCodeAt(i)] = i;\n  }\n\n  exports.encode = function (arraybuffer) {\n    var bytes = new Uint8Array(arraybuffer),\n        i,\n        len = bytes.length,\n        base64 = \"\";\n\n    for (i = 0; i < len; i += 3) {\n      base64 += chars[bytes[i] >> 2];\n      base64 += chars[(bytes[i] & 3) << 4 | bytes[i + 1] >> 4];\n      base64 += chars[(bytes[i + 1] & 15) << 2 | bytes[i + 2] >> 6];\n      base64 += chars[bytes[i + 2] & 63];\n    }\n\n    if (len % 3 === 2) {\n      base64 = base64.substring(0, base64.length - 1) + \"=\";\n    } else if (len % 3 === 1) {\n      base64 = base64.substring(0, base64.length - 2) + \"==\";\n    }\n\n    return base64;\n  };\n\n  exports.decode = function (base64) {\n    var bufferLength = base64.length * 0.75,\n        len = base64.length,\n        i,\n        p = 0,\n        encoded1,\n        encoded2,\n        encoded3,\n        encoded4;\n\n    if (base64[base64.length - 1] === \"=\") {\n      bufferLength--;\n\n      if (base64[base64.length - 2] === \"=\") {\n        bufferLength--;\n      }\n    }\n\n    var arraybuffer = new ArrayBuffer(bufferLength),\n        bytes = new Uint8Array(arraybuffer);\n\n    for (i = 0; i < len; i += 4) {\n      encoded1 = lookup[base64.charCodeAt(i)];\n      encoded2 = lookup[base64.charCodeAt(i + 1)];\n      encoded3 = lookup[base64.charCodeAt(i + 2)];\n      encoded4 = lookup[base64.charCodeAt(i + 3)];\n      bytes[p++] = encoded1 << 2 | encoded2 >> 4;\n      bytes[p++] = (encoded2 & 15) << 4 | encoded3 >> 2;\n      bytes[p++] = (encoded3 & 3) << 6 | encoded4 & 63;\n    }\n\n    return arraybuffer;\n  };\n})();","/**\r\n * Create a blob builder even when vendor prefixes exist\r\n */\nvar BlobBuilder = typeof BlobBuilder !== 'undefined' ? BlobBuilder : typeof WebKitBlobBuilder !== 'undefined' ? WebKitBlobBuilder : typeof MSBlobBuilder !== 'undefined' ? MSBlobBuilder : typeof MozBlobBuilder !== 'undefined' ? MozBlobBuilder : false;\n/**\r\n * Check if Blob constructor is supported\r\n */\n\nvar blobSupported = function () {\n  try {\n    var a = new Blob(['hi']);\n    return a.size === 2;\n  } catch (e) {\n    return false;\n  }\n}();\n/**\r\n * Check if Blob constructor supports ArrayBufferViews\r\n * Fails in Safari 6, so we need to map to ArrayBuffers there.\r\n */\n\n\nvar blobSupportsArrayBufferView = blobSupported && function () {\n  try {\n    var b = new Blob([new Uint8Array([1, 2])]);\n    return b.size === 2;\n  } catch (e) {\n    return false;\n  }\n}();\n/**\r\n * Check if BlobBuilder is supported\r\n */\n\n\nvar blobBuilderSupported = BlobBuilder && BlobBuilder.prototype.append && BlobBuilder.prototype.getBlob;\n/**\r\n * Helper function that maps ArrayBufferViews to ArrayBuffers\r\n * Used by BlobBuilder constructor and old browsers that didn't\r\n * support it in the Blob constructor.\r\n */\n\nfunction mapArrayBufferViews(ary) {\n  return ary.map(function (chunk) {\n    if (chunk.buffer instanceof ArrayBuffer) {\n      var buf = chunk.buffer; // if this is a subarray, make a copy so we only\n      // include the subarray region from the underlying buffer\n\n      if (chunk.byteLength !== buf.byteLength) {\n        var copy = new Uint8Array(chunk.byteLength);\n        copy.set(new Uint8Array(buf, chunk.byteOffset, chunk.byteLength));\n        buf = copy.buffer;\n      }\n\n      return buf;\n    }\n\n    return chunk;\n  });\n}\n\nfunction BlobBuilderConstructor(ary, options) {\n  options = options || {};\n  var bb = new BlobBuilder();\n  mapArrayBufferViews(ary).forEach(function (part) {\n    bb.append(part);\n  });\n  return options.type ? bb.getBlob(options.type) : bb.getBlob();\n}\n\n;\n\nfunction BlobConstructor(ary, options) {\n  return new Blob(mapArrayBufferViews(ary), options || {});\n}\n\n;\n\nif (typeof Blob !== 'undefined') {\n  BlobBuilderConstructor.prototype = Blob.prototype;\n  BlobConstructor.prototype = Blob.prototype;\n}\n\nmodule.exports = function () {\n  if (blobSupported) {\n    return blobSupportsArrayBufferView ? Blob : BlobConstructor;\n  } else if (blobBuilderSupported) {\n    return BlobBuilderConstructor;\n  } else {\n    return undefined;\n  }\n}();","/**\n * This is the common logic for both the Node.js and web browser\n * implementations of `debug()`.\n *\n * Expose `debug()` as the module.\n */\nexports = module.exports = createDebug.debug = createDebug['default'] = createDebug;\nexports.coerce = coerce;\nexports.disable = disable;\nexports.enable = enable;\nexports.enabled = enabled;\nexports.humanize = require('ms');\n/**\n * Active `debug` instances.\n */\n\nexports.instances = [];\n/**\n * The currently active debug mode names, and names to skip.\n */\n\nexports.names = [];\nexports.skips = [];\n/**\n * Map of special \"%n\" handling functions, for the debug \"format\" argument.\n *\n * Valid key names are a single, lower or upper-case letter, i.e. \"n\" and \"N\".\n */\n\nexports.formatters = {};\n/**\n * Select a color.\n * @param {String} namespace\n * @return {Number}\n * @api private\n */\n\nfunction selectColor(namespace) {\n  var hash = 0,\n      i;\n\n  for (i in namespace) {\n    hash = (hash << 5) - hash + namespace.charCodeAt(i);\n    hash |= 0; // Convert to 32bit integer\n  }\n\n  return exports.colors[Math.abs(hash) % exports.colors.length];\n}\n/**\n * Create a debugger with the given `namespace`.\n *\n * @param {String} namespace\n * @return {Function}\n * @api public\n */\n\n\nfunction createDebug(namespace) {\n  var prevTime;\n\n  function debug() {\n    // disabled?\n    if (!debug.enabled) return;\n    var self = debug; // set `diff` timestamp\n\n    var curr = +new Date();\n    var ms = curr - (prevTime || curr);\n    self.diff = ms;\n    self.prev = prevTime;\n    self.curr = curr;\n    prevTime = curr; // turn the `arguments` into a proper Array\n\n    var args = new Array(arguments.length);\n\n    for (var i = 0; i < args.length; i++) {\n      args[i] = arguments[i];\n    }\n\n    args[0] = exports.coerce(args[0]);\n\n    if ('string' !== typeof args[0]) {\n      // anything else let's inspect with %O\n      args.unshift('%O');\n    } // apply any `formatters` transformations\n\n\n    var index = 0;\n    args[0] = args[0].replace(/%([a-zA-Z%])/g, function (match, format) {\n      // if we encounter an escaped % then don't increase the array index\n      if (match === '%%') return match;\n      index++;\n      var formatter = exports.formatters[format];\n\n      if ('function' === typeof formatter) {\n        var val = args[index];\n        match = formatter.call(self, val); // now we need to remove `args[index]` since it's inlined in the `format`\n\n        args.splice(index, 1);\n        index--;\n      }\n\n      return match;\n    }); // apply env-specific formatting (colors, etc.)\n\n    exports.formatArgs.call(self, args);\n    var logFn = debug.log || exports.log || console.log.bind(console);\n    logFn.apply(self, args);\n  }\n\n  debug.namespace = namespace;\n  debug.enabled = exports.enabled(namespace);\n  debug.useColors = exports.useColors();\n  debug.color = selectColor(namespace);\n  debug.destroy = destroy; // env-specific initialization logic for debug instances\n\n  if ('function' === typeof exports.init) {\n    exports.init(debug);\n  }\n\n  exports.instances.push(debug);\n  return debug;\n}\n\nfunction destroy() {\n  var index = exports.instances.indexOf(this);\n\n  if (index !== -1) {\n    exports.instances.splice(index, 1);\n    return true;\n  } else {\n    return false;\n  }\n}\n/**\n * Enables a debug mode by namespaces. This can include modes\n * separated by a colon and wildcards.\n *\n * @param {String} namespaces\n * @api public\n */\n\n\nfunction enable(namespaces) {\n  exports.save(namespaces);\n  exports.names = [];\n  exports.skips = [];\n  var i;\n  var split = (typeof namespaces === 'string' ? namespaces : '').split(/[\\s,]+/);\n  var len = split.length;\n\n  for (i = 0; i < len; i++) {\n    if (!split[i]) continue; // ignore empty strings\n\n    namespaces = split[i].replace(/\\*/g, '.*?');\n\n    if (namespaces[0] === '-') {\n      exports.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));\n    } else {\n      exports.names.push(new RegExp('^' + namespaces + '$'));\n    }\n  }\n\n  for (i = 0; i < exports.instances.length; i++) {\n    var instance = exports.instances[i];\n    instance.enabled = exports.enabled(instance.namespace);\n  }\n}\n/**\n * Disable debug output.\n *\n * @api public\n */\n\n\nfunction disable() {\n  exports.enable('');\n}\n/**\n * Returns true if the given mode name is enabled, false otherwise.\n *\n * @param {String} name\n * @return {Boolean}\n * @api public\n */\n\n\nfunction enabled(name) {\n  if (name[name.length - 1] === '*') {\n    return true;\n  }\n\n  var i, len;\n\n  for (i = 0, len = exports.skips.length; i < len; i++) {\n    if (exports.skips[i].test(name)) {\n      return false;\n    }\n  }\n\n  for (i = 0, len = exports.names.length; i < len; i++) {\n    if (exports.names[i].test(name)) {\n      return true;\n    }\n  }\n\n  return false;\n}\n/**\n * Coerce `val`.\n *\n * @param {Mixed} val\n * @return {Mixed}\n * @api private\n */\n\n\nfunction coerce(val) {\n  if (val instanceof Error) return val.stack || val.message;\n  return val;\n}","/**\n * Module requirements.\n */\nvar Polling = require('./polling');\n\nvar inherit = require('component-inherit');\n/**\n * Module exports.\n */\n\n\nmodule.exports = JSONPPolling;\n/**\n * Cached regular expressions.\n */\n\nvar rNewline = /\\n/g;\nvar rEscapedNewline = /\\\\n/g;\n/**\n * Global JSONP callbacks.\n */\n\nvar callbacks;\n/**\n * Noop.\n */\n\nfunction empty() {}\n/**\n * Until https://github.com/tc39/proposal-global is shipped.\n */\n\n\nfunction glob() {\n  return typeof self !== 'undefined' ? self : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : {};\n}\n/**\n * JSONP Polling constructor.\n *\n * @param {Object} opts.\n * @api public\n */\n\n\nfunction JSONPPolling(opts) {\n  Polling.call(this, opts);\n  this.query = this.query || {}; // define global callbacks array if not present\n  // we do this here (lazily) to avoid unneeded global pollution\n\n  if (!callbacks) {\n    // we need to consider multiple engines in the same page\n    var global = glob();\n    callbacks = global.___eio = global.___eio || [];\n  } // callback identifier\n\n\n  this.index = callbacks.length; // add callback to jsonp global\n\n  var self = this;\n  callbacks.push(function (msg) {\n    self.onData(msg);\n  }); // append to query string\n\n  this.query.j = this.index; // prevent spurious errors from being emitted when the window is unloaded\n\n  if (typeof addEventListener === 'function') {\n    addEventListener('beforeunload', function () {\n      if (self.script) self.script.onerror = empty;\n    }, false);\n  }\n}\n/**\n * Inherits from Polling.\n */\n\n\ninherit(JSONPPolling, Polling);\n/*\n * JSONP only supports binary as base64 encoded strings\n */\n\nJSONPPolling.prototype.supportsBinary = false;\n/**\n * Closes the socket.\n *\n * @api private\n */\n\nJSONPPolling.prototype.doClose = function () {\n  if (this.script) {\n    this.script.parentNode.removeChild(this.script);\n    this.script = null;\n  }\n\n  if (this.form) {\n    this.form.parentNode.removeChild(this.form);\n    this.form = null;\n    this.iframe = null;\n  }\n\n  Polling.prototype.doClose.call(this);\n};\n/**\n * Starts a poll cycle.\n *\n * @api private\n */\n\n\nJSONPPolling.prototype.doPoll = function () {\n  var self = this;\n  var script = document.createElement('script');\n\n  if (this.script) {\n    this.script.parentNode.removeChild(this.script);\n    this.script = null;\n  }\n\n  script.async = true;\n  script.src = this.uri();\n\n  script.onerror = function (e) {\n    self.onError('jsonp poll error', e);\n  };\n\n  var insertAt = document.getElementsByTagName('script')[0];\n\n  if (insertAt) {\n    insertAt.parentNode.insertBefore(script, insertAt);\n  } else {\n    (document.head || document.body).appendChild(script);\n  }\n\n  this.script = script;\n  var isUAgecko = 'undefined' !== typeof navigator && /gecko/i.test(navigator.userAgent);\n\n  if (isUAgecko) {\n    setTimeout(function () {\n      var iframe = document.createElement('iframe');\n      document.body.appendChild(iframe);\n      document.body.removeChild(iframe);\n    }, 100);\n  }\n};\n/**\n * Writes with a hidden iframe.\n *\n * @param {String} data to send\n * @param {Function} called upon flush.\n * @api private\n */\n\n\nJSONPPolling.prototype.doWrite = function (data, fn) {\n  var self = this;\n\n  if (!this.form) {\n    var form = document.createElement('form');\n    var area = document.createElement('textarea');\n    var id = this.iframeId = 'eio_iframe_' + this.index;\n    var iframe;\n    form.className = 'socketio';\n    form.style.position = 'absolute';\n    form.style.top = '-1000px';\n    form.style.left = '-1000px';\n    form.target = id;\n    form.method = 'POST';\n    form.setAttribute('accept-charset', 'utf-8');\n    area.name = 'd';\n    form.appendChild(area);\n    document.body.appendChild(form);\n    this.form = form;\n    this.area = area;\n  }\n\n  this.form.action = this.uri();\n\n  function complete() {\n    initIframe();\n    fn();\n  }\n\n  function initIframe() {\n    if (self.iframe) {\n      try {\n        self.form.removeChild(self.iframe);\n      } catch (e) {\n        self.onError('jsonp polling iframe removal error', e);\n      }\n    }\n\n    try {\n      // ie6 dynamic iframes with target=\"\" support (thanks Chris Lambacher)\n      var html = '<iframe src=\"javascript:0\" name=\"' + self.iframeId + '\">';\n      iframe = document.createElement(html);\n    } catch (e) {\n      iframe = document.createElement('iframe');\n      iframe.name = self.iframeId;\n      iframe.src = 'javascript:0';\n    }\n\n    iframe.id = self.iframeId;\n    self.form.appendChild(iframe);\n    self.iframe = iframe;\n  }\n\n  initIframe(); // escape \\n to prevent it from being converted into \\r\\n by some UAs\n  // double escaping is required for escaped new lines because unescaping of new lines can be done safely on server-side\n\n  data = data.replace(rEscapedNewline, '\\\\\\n');\n  this.area.value = data.replace(rNewline, '\\\\n');\n\n  try {\n    this.form.submit();\n  } catch (e) {}\n\n  if (this.iframe.attachEvent) {\n    this.iframe.onreadystatechange = function () {\n      if (self.iframe.readyState === 'complete') {\n        complete();\n      }\n    };\n  } else {\n    this.iframe.onload = complete;\n  }\n};","/**\n * Module dependencies.\n */\nvar Transport = require('../transport');\n\nvar parser = require('engine.io-parser');\n\nvar parseqs = require('parseqs');\n\nvar inherit = require('component-inherit');\n\nvar yeast = require('yeast');\n\nvar debug = require('debug')('engine.io-client:websocket');\n\nvar BrowserWebSocket, NodeWebSocket;\n\nif (typeof WebSocket !== 'undefined') {\n  BrowserWebSocket = WebSocket;\n} else if (typeof self !== 'undefined') {\n  BrowserWebSocket = self.WebSocket || self.MozWebSocket;\n} else {\n  try {\n    NodeWebSocket = require('ws');\n  } catch (e) {}\n}\n/**\n * Get either the `WebSocket` or `MozWebSocket` globals\n * in the browser or try to resolve WebSocket-compatible\n * interface exposed by `ws` for Node-like environment.\n */\n\n\nvar WebSocketImpl = BrowserWebSocket || NodeWebSocket;\n/**\n * Module exports.\n */\n\nmodule.exports = WS;\n/**\n * WebSocket transport constructor.\n *\n * @api {Object} connection options\n * @api public\n */\n\nfunction WS(opts) {\n  var forceBase64 = opts && opts.forceBase64;\n\n  if (forceBase64) {\n    this.supportsBinary = false;\n  }\n\n  this.perMessageDeflate = opts.perMessageDeflate;\n  this.usingBrowserWebSocket = BrowserWebSocket && !opts.forceNode;\n  this.protocols = opts.protocols;\n\n  if (!this.usingBrowserWebSocket) {\n    WebSocketImpl = NodeWebSocket;\n  }\n\n  Transport.call(this, opts);\n}\n/**\n * Inherits from Transport.\n */\n\n\ninherit(WS, Transport);\n/**\n * Transport name.\n *\n * @api public\n */\n\nWS.prototype.name = 'websocket';\n/*\n * WebSockets support binary\n */\n\nWS.prototype.supportsBinary = true;\n/**\n * Opens socket.\n *\n * @api private\n */\n\nWS.prototype.doOpen = function () {\n  if (!this.check()) {\n    // let probe timeout\n    return;\n  }\n\n  var uri = this.uri();\n  var protocols = this.protocols;\n  var opts = {\n    agent: this.agent,\n    perMessageDeflate: this.perMessageDeflate\n  }; // SSL options for Node.js client\n\n  opts.pfx = this.pfx;\n  opts.key = this.key;\n  opts.passphrase = this.passphrase;\n  opts.cert = this.cert;\n  opts.ca = this.ca;\n  opts.ciphers = this.ciphers;\n  opts.rejectUnauthorized = this.rejectUnauthorized;\n\n  if (this.extraHeaders) {\n    opts.headers = this.extraHeaders;\n  }\n\n  if (this.localAddress) {\n    opts.localAddress = this.localAddress;\n  }\n\n  try {\n    this.ws = this.usingBrowserWebSocket && !this.isReactNative ? protocols ? new WebSocketImpl(uri, protocols) : new WebSocketImpl(uri) : new WebSocketImpl(uri, protocols, opts);\n  } catch (err) {\n    return this.emit('error', err);\n  }\n\n  if (this.ws.binaryType === undefined) {\n    this.supportsBinary = false;\n  }\n\n  if (this.ws.supports && this.ws.supports.binary) {\n    this.supportsBinary = true;\n    this.ws.binaryType = 'nodebuffer';\n  } else {\n    this.ws.binaryType = 'arraybuffer';\n  }\n\n  this.addEventListeners();\n};\n/**\n * Adds event listeners to the socket\n *\n * @api private\n */\n\n\nWS.prototype.addEventListeners = function () {\n  var self = this;\n\n  this.ws.onopen = function () {\n    self.onOpen();\n  };\n\n  this.ws.onclose = function () {\n    self.onClose();\n  };\n\n  this.ws.onmessage = function (ev) {\n    self.onData(ev.data);\n  };\n\n  this.ws.onerror = function (e) {\n    self.onError('websocket error', e);\n  };\n};\n/**\n * Writes data to socket.\n *\n * @param {Array} array of packets.\n * @api private\n */\n\n\nWS.prototype.write = function (packets) {\n  var self = this;\n  this.writable = false; // encodePacket efficient as it uses WS framing\n  // no need for encodePayload\n\n  var total = packets.length;\n\n  for (var i = 0, l = total; i < l; i++) {\n    (function (packet) {\n      parser.encodePacket(packet, self.supportsBinary, function (data) {\n        if (!self.usingBrowserWebSocket) {\n          // always create a new object (GH-437)\n          var opts = {};\n\n          if (packet.options) {\n            opts.compress = packet.options.compress;\n          }\n\n          if (self.perMessageDeflate) {\n            var len = 'string' === typeof data ? Buffer.byteLength(data) : data.length;\n\n            if (len < self.perMessageDeflate.threshold) {\n              opts.compress = false;\n            }\n          }\n        } // Sometimes the websocket has already been closed but the browser didn't\n        // have a chance of informing us about it yet, in that case send will\n        // throw an error\n\n\n        try {\n          if (self.usingBrowserWebSocket) {\n            // TypeError is thrown when passing the second argument on Safari\n            self.ws.send(data);\n          } else {\n            self.ws.send(data, opts);\n          }\n        } catch (e) {\n          debug('websocket closed before onclose event');\n        }\n\n        --total || done();\n      });\n    })(packets[i]);\n  }\n\n  function done() {\n    self.emit('flush'); // fake drain\n    // defer to next tick to allow Socket to clear writeBuffer\n\n    setTimeout(function () {\n      self.writable = true;\n      self.emit('drain');\n    }, 0);\n  }\n};\n/**\n * Called upon close\n *\n * @api private\n */\n\n\nWS.prototype.onClose = function () {\n  Transport.prototype.onClose.call(this);\n};\n/**\n * Closes socket.\n *\n * @api private\n */\n\n\nWS.prototype.doClose = function () {\n  if (typeof this.ws !== 'undefined') {\n    this.ws.close();\n  }\n};\n/**\n * Generates uri for connection.\n *\n * @api private\n */\n\n\nWS.prototype.uri = function () {\n  var query = this.query || {};\n  var schema = this.secure ? 'wss' : 'ws';\n  var port = ''; // avoid port if default for schema\n\n  if (this.port && ('wss' === schema && Number(this.port) !== 443 || 'ws' === schema && Number(this.port) !== 80)) {\n    port = ':' + this.port;\n  } // append timestamp to URI\n\n\n  if (this.timestampRequests) {\n    query[this.timestampParam] = yeast();\n  } // communicate binary support capabilities\n\n\n  if (!this.supportsBinary) {\n    query.b64 = 1;\n  }\n\n  query = parseqs.encode(query); // prepend ? to query\n\n  if (query.length) {\n    query = '?' + query;\n  }\n\n  var ipv6 = this.hostname.indexOf(':') !== -1;\n  return schema + '://' + (ipv6 ? '[' + this.hostname + ']' : this.hostname) + port + this.path + query;\n};\n/**\n * Feature detection for WebSocket.\n *\n * @return {Boolean} whether this transport is available.\n * @api public\n */\n\n\nWS.prototype.check = function () {\n  return !!WebSocketImpl && !('__initialize' in WebSocketImpl && this.name === WS.prototype.name);\n};","module.exports = toArray;\n\nfunction toArray(list, index) {\n  var array = [];\n  index = index || 0;\n\n  for (var i = index || 0; i < list.length; i++) {\n    array[i - index] = list[i];\n  }\n\n  return array;\n}","/**\n * Expose `Backoff`.\n */\nmodule.exports = Backoff;\n/**\n * Initialize backoff timer with `opts`.\n *\n * - `min` initial timeout in milliseconds [100]\n * - `max` max timeout [10000]\n * - `jitter` [0]\n * - `factor` [2]\n *\n * @param {Object} opts\n * @api public\n */\n\nfunction Backoff(opts) {\n  opts = opts || {};\n  this.ms = opts.min || 100;\n  this.max = opts.max || 10000;\n  this.factor = opts.factor || 2;\n  this.jitter = opts.jitter > 0 && opts.jitter <= 1 ? opts.jitter : 0;\n  this.attempts = 0;\n}\n/**\n * Return the backoff duration.\n *\n * @return {Number}\n * @api public\n */\n\n\nBackoff.prototype.duration = function () {\n  var ms = this.ms * Math.pow(this.factor, this.attempts++);\n\n  if (this.jitter) {\n    var rand = Math.random();\n    var deviation = Math.floor(rand * this.jitter * ms);\n    ms = (Math.floor(rand * 10) & 1) == 0 ? ms - deviation : ms + deviation;\n  }\n\n  return Math.min(ms, this.max) | 0;\n};\n/**\n * Reset the number of attempts.\n *\n * @api public\n */\n\n\nBackoff.prototype.reset = function () {\n  this.attempts = 0;\n};\n/**\n * Set the minimum duration\n *\n * @api public\n */\n\n\nBackoff.prototype.setMin = function (min) {\n  this.ms = min;\n};\n/**\n * Set the maximum duration\n *\n * @api public\n */\n\n\nBackoff.prototype.setMax = function (max) {\n  this.max = max;\n};\n/**\n * Set the jitter\n *\n * @api public\n */\n\n\nBackoff.prototype.setJitter = function (jitter) {\n  this.jitter = jitter;\n};"],"sourceRoot":""}