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{"version":3,"file":"adapter.min.js","sources":["../src/adapter.js"],"sourcesContent":["/**\n * Description of import/upgrade into Moodle:\n *\n * 1. Visit https://github.com/webrtc/adapter/releases.\n * 2. Check if the version has been updated from what is listed in lib/thirdpartylibs.xml in the Moodle wwwroot.\n * 3. If it has -\n * 1. Download the source code.\n * 2. Copy the content of the file release/adapter.js from the archive (ignore the first line).\n * 3. Replace the content below \"return (function e(t,n,r) ..\" in this file with the content you copied.\n * 4. Ensure to update lib/thirdpartylibs.xml with any changes.\n */\n\n// ESLint directives.\n/* eslint-disable */\n\n// JSHint directives.\n/* jshint ignore:start */\n\ndefine([], function() {\nreturn (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require==\"function\"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error(\"Cannot find module '\"+o+\"'\");throw f.code=\"MODULE_NOT_FOUND\",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require==\"function\"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){\n/*\n * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n/* eslint-env node */\n\n'use strict';\n\nvar _adapter_factory = require('./adapter_factory.js');\n\nvar adapter = (0, _adapter_factory.adapterFactory)({ window: typeof window === 'undefined' ? undefined : window });\nmodule.exports = adapter; // this is the difference from adapter_core.\n\n},{\"./adapter_factory.js\":2}],2:[function(require,module,exports){\n'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n value: true\n});\nexports.adapterFactory = adapterFactory;\n\nvar _utils = require('./utils');\n\nvar utils = _interopRequireWildcard(_utils);\n\nvar _chrome_shim = require('./chrome/chrome_shim');\n\nvar chromeShim = _interopRequireWildcard(_chrome_shim);\n\nvar _firefox_shim = require('./firefox/firefox_shim');\n\nvar firefoxShim = _interopRequireWildcard(_firefox_shim);\n\nvar _safari_shim = require('./safari/safari_shim');\n\nvar safariShim = _interopRequireWildcard(_safari_shim);\n\nvar _common_shim = require('./common_shim');\n\nvar commonShim = _interopRequireWildcard(_common_shim);\n\nvar _sdp = require('sdp');\n\nvar sdp = _interopRequireWildcard(_sdp);\n\nfunction _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }\n\n// Shimming starts here.\n/*\n * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\nfunction adapterFactory() {\n var _ref = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},\n window = _ref.window;\n\n var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {\n shimChrome: true,\n shimFirefox: true,\n shimSafari: true\n };\n\n // Utils.\n var logging = utils.log;\n var browserDetails = utils.detectBrowser(window);\n\n var adapter = {\n browserDetails: browserDetails,\n commonShim: commonShim,\n extractVersion: utils.extractVersion,\n disableLog: utils.disableLog,\n disableWarnings: utils.disableWarnings,\n // Expose sdp as a convenience. For production apps include directly.\n sdp: sdp\n };\n\n // Shim browser if found.\n switch (browserDetails.browser) {\n case 'chrome':\n if (!chromeShim || !chromeShim.shimPeerConnection || !options.shimChrome) {\n logging('Chrome shim is not included in this adapter release.');\n return adapter;\n }\n if (browserDetails.version === null) {\n logging('Chrome shim can not determine version, not shimming.');\n return adapter;\n }\n logging('adapter.js shimming chrome.');\n // Export to the adapter global object visible in the browser.\n adapter.browserShim = chromeShim;\n\n // Must be called before shimPeerConnection.\n commonShim.shimAddIceCandidateNullOrEmpty(window, browserDetails);\n\n chromeShim.shimGetUserMedia(window, browserDetails);\n chromeShim.shimMediaStream(window, browserDetails);\n chromeShim.shimPeerConnection(window, browserDetails);\n chromeShim.shimOnTrack(window, browserDetails);\n chromeShim.shimAddTrackRemoveTrack(window, browserDetails);\n chromeShim.shimGetSendersWithDtmf(window, browserDetails);\n chromeShim.shimGetStats(window, browserDetails);\n chromeShim.shimSenderReceiverGetStats(window, browserDetails);\n chromeShim.fixNegotiationNeeded(window, browserDetails);\n\n commonShim.shimRTCIceCandidate(window, browserDetails);\n commonShim.shimConnectionState(window, browserDetails);\n commonShim.shimMaxMessageSize(window, browserDetails);\n commonShim.shimSendThrowTypeError(window, browserDetails);\n commonShim.removeExtmapAllowMixed(window, browserDetails);\n break;\n case 'firefox':\n if (!firefoxShim || !firefoxShim.shimPeerConnection || !options.shimFirefox) {\n logging('Firefox shim is not included in this adapter release.');\n return adapter;\n }\n logging('adapter.js shimming firefox.');\n // Export to the adapter global object visible in the browser.\n adapter.browserShim = firefoxShim;\n\n // Must be called before shimPeerConnection.\n commonShim.shimAddIceCandidateNullOrEmpty(window, browserDetails);\n\n firefoxShim.shimGetUserMedia(window, browserDetails);\n firefoxShim.shimPeerConnection(window, browserDetails);\n firefoxShim.shimOnTrack(window, browserDetails);\n firefoxShim.shimRemoveStream(window, browserDetails);\n firefoxShim.shimSenderGetStats(window, browserDetails);\n firefoxShim.shimReceiverGetStats(window, browserDetails);\n firefoxShim.shimRTCDataChannel(window, browserDetails);\n firefoxShim.shimAddTransceiver(window, browserDetails);\n firefoxShim.shimGetParameters(window, browserDetails);\n firefoxShim.shimCreateOffer(window, browserDetails);\n firefoxShim.shimCreateAnswer(window, browserDetails);\n\n commonShim.shimRTCIceCandidate(window, browserDetails);\n commonShim.shimConnectionState(window, browserDetails);\n commonShim.shimMaxMessageSize(window, browserDetails);\n commonShim.shimSendThrowTypeError(window, browserDetails);\n break;\n case 'safari':\n if (!safariShim || !options.shimSafari) {\n logging('Safari shim is not included in this adapter release.');\n return adapter;\n }\n logging('adapter.js shimming safari.');\n // Exportto the adapter global object visible in the browser.\n adapter.browserShim = safariShim;\n\n // Must be called before shimCallbackAPI.\n commonShim.shimAddIceCandidateNullOrEmpty(window, browserDetails);\n\n safariShim.shimRTCIceServerUrls(window, browserDetails);\n safariShim.shimCreateOfferLegacy(window, browserDetails);\n safariShim.shimCallbacksAPI(window, browserDetails);\n safariShim.shimLocalStreamsAPI(window, browserDetails);\n safariShim.shimRemoteStreamsAPI(window, browserDetails);\n safariShim.shimTrackEventTransceiver(window, browserDetails);\n safariShim.shimGetUserMedia(window, browserDetails);\n safariShim.shimAudioContext(window, browserDetails);\n\n commonShim.shimRTCIceCandidate(window, browserDetails);\n commonShim.shimMaxMessageSize(window, browserDetails);\n commonShim.shimSendThrowTypeError(window, browserDetails);\n commonShim.removeExtmapAllowMixed(window, browserDetails);\n break;\n default:\n logging('Unsupported browser!');\n break;\n }\n\n return adapter;\n}\n\n// Browser shims.\n\n},{\"./chrome/chrome_shim\":3,\"./common_shim\":6,\"./firefox/firefox_shim\":7,\"./safari/safari_shim\":10,\"./utils\":11,\"sdp\":12}],3:[function(require,module,exports){\n/*\n * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n/* eslint-env node */\n'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n value: true\n});\nexports.shimGetDisplayMedia = exports.shimGetUserMedia = undefined;\n\nvar _typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; };\n\nvar _getusermedia = require('./getusermedia');\n\nObject.defineProperty(exports, 'shimGetUserMedia', {\n enumerable: true,\n get: function get() {\n return _getusermedia.shimGetUserMedia;\n }\n});\n\nvar _getdisplaymedia = require('./getdisplaymedia');\n\nObject.defineProperty(exports, 'shimGetDisplayMedia', {\n enumerable: true,\n get: function get() {\n return _getdisplaymedia.shimGetDisplayMedia;\n }\n});\nexports.shimMediaStream = shimMediaStream;\nexports.shimOnTrack = shimOnTrack;\nexports.shimGetSendersWithDtmf = shimGetSendersWithDtmf;\nexports.shimGetStats = shimGetStats;\nexports.shimSenderReceiverGetStats = shimSenderReceiverGetStats;\nexports.shimAddTrackRemoveTrackWithNative = shimAddTrackRemoveTrackWithNative;\nexports.shimAddTrackRemoveTrack = shimAddTrackRemoveTrack;\nexports.shimPeerConnection = shimPeerConnection;\nexports.fixNegotiationNeeded = fixNegotiationNeeded;\n\nvar _utils = require('../utils.js');\n\nvar utils = _interopRequireWildcard(_utils);\n\nfunction _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; }else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }\n\nfunction _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }\n\nfunction shimMediaStream(window) {\n window.MediaStream = window.MediaStream || window.webkitMediaStream;\n}\n\nfunction shimOnTrack(window) {\n if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && !('ontrack' in window.RTCPeerConnection.prototype)) {\n Object.defineProperty(window.RTCPeerConnection.prototype, 'ontrack', {\n get: function get() {\n return this._ontrack;\n },\n set: function set(f) {\n if (this._ontrack) {\n this.removeEventListener('track', this._ontrack);\n }\n this.addEventListener('track', this._ontrack = f);\n },\n\n enumerable: true,\n configurable: true\n });\n var origSetRemoteDescription = window.RTCPeerConnection.prototype.setRemoteDescription;\n window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription() {\n var _this = this;\n\n if (!this._ontrackpoly) {\n this._ontrackpoly = function (e) {\n // onaddstream does not fire when a track is added to an existing\n // stream. But stream.onaddtrack is implemented so we use that.\n e.stream.addEventListener('addtrack', function (te) {\n var receiver = void 0;\n if (window.RTCPeerConnection.prototype.getReceivers) {\n receiver = _this.getReceivers().find(function (r) {\n return r.track && r.track.id === te.track.id;\n });\n } else {\n receiver = { track: te.track };\n }\n\n var event = new Event('track');\n event.track= te.track;\n event.receiver = receiver;\n event.transceiver = { receiver: receiver };\n event.streams = [e.stream];\n _this.dispatchEvent(event);\n });\n e.stream.getTracks().forEach(function (track) {\n var receiver = void 0;\n if (window.RTCPeerConnection.prototype.getReceivers) {\n receiver = _this.getReceivers().find(function (r) {\n return r.track && r.track.id === track.id;\n });\n } else {\n receiver = { track: track };\n }\n var event = new Event('track');\n event.track = track;\n event.receiver = receiver;\n event.transceiver = { receiver: receiver };\n event.streams = [e.stream];\n _this.dispatchEvent(event);\n });\n };\n this.addEventListener('addstream', this._ontrackpoly);\n }\n return origSetRemoteDescription.apply(this, arguments);\n};\n } else {\n // even if RTCRtpTransceiver is in window, it is only used and\n // emitted in unified-plan. Unfortunately this means we need\n // to unconditionally wrap the event.\n utils.wrapPeerConnectionEvent(window, 'track', function (e) {\n if (!e.transceiver) {\n Object.defineProperty(e, 'transceiver', { value: { receiver: e.receiver } });\n }\n return e;\n });\n }\n}\n\nfunction shimGetSendersWithDtmf(window) {\n // Overrides addTrack/removeTrack, depends on shimAddTrackRemoveTrack.\n if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && !('getSenders' in window.RTCPeerConnection.prototype) && 'createDTMFSender' in window.RTCPeerConnection.prototype) {\n var shimSenderWithDtmf = function shimSenderWithDtmf(pc, track) {\n return {\n track: track,\n get dtmf() {\n if (this._dtmf === undefined) {\n if (track.kind === 'audio') {\n this._dtmf = pc.createDTMFSender(track);\n } else {\n this._dtmf = null;\n }\n }\n return this._dtmf;\n },\n _pc: pc\n };\n };\n\n // augment addTrack when getSenders is not available.\n if (!window.RTCPeerConnection.prototype.getSenders) {\n window.RTCPeerConnection.prototype.getSenders = function getSenders() {\n this._senders = this._senders || [];\n return this._senders.slice(); // return a copy of the internal state.\n };\n var origAddTrack = window.RTCPeerConnection.prototype.addTrack;\n window.RTCPeerConnection.prototype.addTrack = function addTrack(track, stream) {\n var sender = origAddTrack.apply(this, arguments);\n if (!sender) {\n sender = shimSenderWithDtmf(this, track);\n this._senders.push(sender);\n }\n return sender;\n };\n\n var origRemoveTrack = window.RTCPeerConnection.prototype.removeTrack;\n window.RTCPeerConnection.prototype.removeTrack = function removeTrack(sender) {\n origRemoveTrack.apply(this, arguments);\n var idx = this._senders.indexOf(sender);\n if (idx !== -1) {\n this._senders.splice(idx, 1);\n }\n };\n }\n var origAddStream = window.RTCPeerConnection.prototype.addStream;\n window.RTCPeerConnection.prototype.addStream = function addStream(stream) {\n var _this2 = this;\n\n this._senders = this._senders || [];\n origAddStream.apply(this, [stream]);\n stream.getTracks().forEach(function (track) {\n _this2._senders.push(shimSenderWithDtmf(_this2, track));\n });\n };\n\n var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;\n window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {\n var _this3 = this;\n\n this._senders = this._senders || [];\n origRemoveStream.apply(this, [stream]);\n\n stream.getTracks().forEach(function (track) {\n var sender = _this3._senders.find(function (s) {\n return s.track === track;\n });\n if (sender) {\n // remove sender\n _this3._senders.splice(_this3._senders.indexOf(sender), 1);\n }\n });\n };\n } else if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && 'getSenders' in window.RTCPeerConnection.prototype && 'createDTMFSender' in window.RTCPeerConnection.prototype && window.RTCRtpSender && !('dtmf' in window.RTCRtpSender.prototype)) {\n var origGetSenders = window.RTCPeerConnection.prototype.getSenders;\n window.RTCPeerConnection.prototype.getSenders = function getSenders() {\n var _this4 = this;\n\n var senders = origGetSenders.apply(this, []);\n senders.forEach(function (sender) {\n return sender._pc = _this4;\n });\n return senders;\n };\n\n Object.defineProperty(window.RTCRtpSender.prototype, 'dtmf', {\n get: function get() {\n if (this._dtmf === undefined) {\nif (this.track.kind === 'audio') {\n this._dtmf = this._pc.createDTMFSender(this.track);\n } else {\n this._dtmf = null;\n }\n }\n return this._dtmf;\n }\n });\n }\n}\n\nfunction shimGetStats(window) {\n if (!window.RTCPeerConnection) {\n return;\n }\n\n var origGetStats = window.RTCPeerConnection.prototype.getStats;\n window.RTCPeerConnection.prototype.getStats = function getStats() {\n var _this5 = this;\n\n var _arguments = Array.prototype.slice.call(arguments),\n selector = _arguments[0],\n onSucc = _arguments[1],\n onErr = _arguments[2];\n\n // If selector is a function then we are in the old style stats so just\n // pass back the original getStats format to avoid breaking old users.\n\n\n if (arguments.length > 0 && typeof selector === 'function') {\n return origGetStats.apply(this, arguments);\n }\n\n // When spec-style getStats is supported, return those when called with\n // either no arguments or the selector argument is null.\n if (origGetStats.length === 0 && (arguments.length === 0 || typeof selector !== 'function')) {\n return origGetStats.apply(this, []);\n }\n\n var fixChromeStats_ = function fixChromeStats_(response) {\n var standardReport = {};\n var reports = response.result();\n reports.forEach(function (report) {\n var standardStats = {\n id: report.id,\n timestamp: report.timestamp,\n type: {\n localcandidate: 'local-candidate',\n remotecandidate: 'remote-candidate'\n }[report.type] || report.type\n };\n report.names().forEach(function (name) {\n standardStats[name] = report.stat(name);\n });\n standardReport[standardStats.id] = standardStats;\n });\n\n return standardReport;\n };\n\n // shim getStats with maplike support\n var makeMapStats = function makeMapStats(stats) {\n return new Map(Object.keys(stats).map(function (key) {\n return [key, stats[key]];\n }));\n };\n\n if (arguments.length >= 2) {\n var successCallbackWrapper_ = function successCallbackWrapper_(response) {\n onSucc(makeMapStats(fixChromeStats_(response)));\n };\n\n return origGetStats.apply(this, [successCallbackWrapper_, selector]);\n }\n\n // promise-support\n return new Promise(function (resolve, reject) {\n origGetStats.apply(_this5, [function (response) {\n resolve(makeMapStats(fixChromeStats_(response)));\n }, reject]);\n }).then(onSucc, onErr);\n };\n}\n\nfunction shimSenderReceiverGetStats(window) {\n if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && window.RTCRtpSender && window.RTCRtpReceiver)) {\n return;\n }\n\n // shim sender stats.\n if (!('getStats' in window.RTCRtpSender.prototype)) {\n var origGetSenders = window.RTCPeerConnection.prototype.getSenders;\n if (origGetSenders) {\n window.RTCPeerConnection.prototype.getSenders = function getSenders() {\n var _this6 = this;\n\n var senders = origGetSenders.apply(this, []);\n senders.forEach(function (sender) {\n return sender._pc = _this6;\n });\n return senders;\n };\n }\n\n var origAddTrack = window.RTCPeerConnection.prototype.addTrack;\n if (origAddTrack) {\n window.RTCPeerConnection.prototype.addTrack = function addTrack() {\n var sender = origAddTrack.apply(this, arguments);\n sender._pc = this;\n return sender;\n };\n }\n window.RTCRtpSender.prototype.getStats = function getStats() {\n var sender = this;\n return this._pc.getStats().then(function (result) {\n return (\n /* Note: this will include stats of all senders that\n * send a track with the same id as sender.track as\n * it is not possible to identify the RTCRtpSender.\n */\n utils.filterStats(result, sender.track, true)\n );\n });\n };\n }\n\n // shim receiver stats.\n if (!('getStats' in window.RTCRtpReceiver.prototype)) {\n var origGetReceivers = window.RTCPeerConnection.prototype.getReceivers;\n if (origGetReceivers) {\n window.RTCPeerConnection.prototype.getReceivers = function getReceivers() {\n var _this7 = this;\n\n var receivers = origGetReceivers.apply(this, []);\n receivers.forEach(function (receiver) {\n return receiver._pc = _this7;\n });\n return receivers;\n };\n }\n utils.wrapPeerConnectionEvent(window, 'track', function (e) {\n e.receiver._pc = e.srcElement;\n return e;\n });\n window.RTCRtpReceiver.prototype.getStats = function getStats() {\n var receiver = this;\n return this._pc.getStats().then(function (result) {\n return utils.filterStats(result, receiver.track, false);\n });\n };\n }\n\n if (!('getStats' in window.RTCRtpSender.prototype && 'getStats' in window.RTCRtpReceiver.prototype)) {\n return;\n }\n\n // shim RTCPeerConnection.getStats(track).\n var origGetStats = window.RTCPeerConnection.prototype.getStats;\n window.RTCPeerConnection.prototype.getStats = function getStats() {\n if (arguments.length > 0 && arguments[0] instanceof window.MediaStreamTrack) {\n var track = arguments[0];\n var sender = void 0;\n var receiver = void 0;\n var err = void 0;\n this.getSenders().forEach(function (s) {\n if (s.track === track) {\n if (sender) {\n err = true;\n } else {\n sender = s;\n }\n }\n });\n this.getReceivers().forEach(function (r) {\n if (r.track === track) {\n if (receiver) {\n err = true;\n } else {\n receiver = r;\n }\n }\n return r.track === track;\n });\n if (err || sender && receiver) {\n return Promise.reject(new DOMException('There are more than one sender or receiver for the track.', 'InvalidAccessError'));\n } else if (sender) {\n return sender.getStats();\n } else if (receiver) {\n return receiver.getStats();\n }\n return Promise.reject(new DOMException('There is no sender or receiver for the track.', 'InvalidAccessError'));\n }\n return origGetStats.apply(this, arguments);\n };\n}\n\nfunction shimAddTrackRemoveTrackWithNative(window) {\n // shim addTrack/removeTrack with native variants in order to make\n // the interactions with legacy getLocalStreams behave as in other browsers.\n // Keeps a mapping stream.id => [stream, rtpsenders...]\n window.RTCPeerConnection.prototype.getLocalStreams = function getLocalStreams() {\n var _this8 = this;\n\n this._shimmedLocalStreams = this._shimmedLocalStreams || {};\n return Object.keys(this._shimmedLocalStreams).map(function (streamId) {\n return _this8._shimmedLocalStreams[streamId][0];\n });\n };\n\n var origAddTrack = window.RTCPeerConnection.prototype.addTrack;\n window.RTCPeerConnection.prototype.addTrack = function addTrack(track, stream) {\n if (!stream) {\n return origAddTrack.apply(this, arguments);\n }\n this._shimmedLocalStreams = this._shimmedLocalStreams || {};\n\n var sender = origAddTrack.apply(this, arguments);\n if (!this._shimmedLocalStreams[stream.id]) {\n this._shimmedLocalStreams[stream.id] = [stream, sender];\n } else if (this._shimmedLocalStreams[stream.id].indexOf(sender) === -1) {\n this._shimmedLocalStreams[stream.id].push(sender);\n }\n return sender;\n };\n\n var origAddStream = window.RTCPeerConnection.prototype.addStream;\n window.RTCPeerConnection.prototype.addStream = function addStream(stream) {\n var _this9 = this;\n\n this._shimmedLocalStreams = this._shimmedLocalStreams || {};\n\n stream.getTracks().forEach(function (track) {\n var alreadyExists = _this9.getSenders().find(function (s) {\n return s.track === track;\n });\n if (alreadyExists) {\n throw new DOMException('Track already exists.', 'InvalidAccessError');\n }\n });\n var existingSenders = this.getSenders();\n origAddStream.apply(this, arguments);\n var newSenders = this.getSenders().filter(function (newSender) {\n return existingSenders.indexOf(newSender) === -1;\n });\n this._shimmedLocalStreams[stream.id] = [stream].concat(newSenders);\n };\n\n var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;\n window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {\n this._shimmedLocalStreams = this._shimmedLocalStreams || {};\n delete this._shimmedLocalStreams[stream.id];\n return origRemoveStream.apply(this, arguments);\n };\n\n var origRemoveTrack = window.RTCPeerConnection.prototype.removeTrack;\n window.RTCPeerConnection.prototype.removeTrack = function removeTrack(sender) {\n var _this10 = this;\n\n this._shimmedLocalStreams = this._shimmedLocalStreams || {};\n if (sender) {\n Object.keys(this._shimmedLocalStreams).forEach(function (streamId) {\n var idx = _this10._shimmedLocalStreams[streamId].indexOf(sender);\n if (idx !== -1) {\n _this10._shimmedLocalStreams[streamId].splice(idx, 1);\n }\n if (_this10._shimmedLocalStreams[streamId].length === 1) {\n delete _this10._shimmedLocalStreams[streamId];\n }\n });\n }\n return origRemoveTrack.apply(this, arguments);\n };\n}\n\nfunction shimAddTrackRemoveTrack(window, browserDetails) {\n if (!window.RTCPeerConnection) {\n return;\n }\n // shim addTrack and removeTrack.\n if (window.RTCPeerConnection.prototype.addTrack && browserDetails.version >= 65) {\n return shimAddTrackRemoveTrackWithNative(window);\n }\n\n // also shim pc.getLocalStreams when addTrack is shimmed\n // to return the original streams.\n var origGetLocalStreams = window.RTCPeerConnection.prototype.getLocalStreams;\n window.RTCPeerConnection.prototype.getLocalStreams = function getLocalStreams() {\n var _this11 = this;\n\nvar nativeStreams = origGetLocalStreams.apply(this);\n this._reverseStreams = this._reverseStreams || {};\n return nativeStreams.map(function (stream) {\n return _this11._reverseStreams[stream.id];\n });\n };\n\n var origAddStream = window.RTCPeerConnection.prototype.addStream;\n window.RTCPeerConnection.prototype.addStream = function addStream(stream) {\n var _this12 = this;\n\n this._streams = this._streams || {};\n this._reverseStreams = this._reverseStreams || {};\n\n stream.getTracks().forEach(function (track) {\n var alreadyExists = _this12.getSenders().find(function (s) {\n return s.track === track;\n });\n if (alreadyExists) {\n throw new DOMException('Track already exists.', 'InvalidAccessError');\n }\n });\n // Add identity mapping for consistency with addTrack.\n // Unless this is being used with a stream from addTrack.\n if (!this._reverseStreams[stream.id]) {\n var newStream = new window.MediaStream(stream.getTracks());\n this._streams[stream.id] = newStream;\n this._reverseStreams[newStream.id] = stream;\n stream = newStream;\n }\n origAddStream.apply(this, [stream]);\n };\n\n var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;\n window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {\n this._streams = this._streams || {};\n this._reverseStreams = this._reverseStreams || {};\n\n origRemoveStream.apply(this, [this._streams[stream.id] || stream]);\n delete this._reverseStreams[this._streams[stream.id] ? this._streams[stream.id].id : stream.id];\n delete this._streams[stream.id];\n };\n\n window.RTCPeerConnection.prototype.addTrack = function addTrack(track, stream) {\n var _this13 = this;\n\n if (this.signalingState === 'closed') {\n throw new DOMException('The RTCPeerConnection\\'s signalingState is \\'closed\\'.', 'InvalidStateError');\n }\n var streams = [].slice.call(arguments, 1);\n if (streams.length !== 1|| !streams[0].getTracks().find(function (t) {\n return t === track;\n })) {\n // this is not fully correct but all we can manage without\n // [[associated MediaStreams]] internal slot.\n throw new DOMException('The adapter.js addTrack polyfill only supports a single ' + ' stream which is associated with the specified track.', 'NotSupportedError');\n }\n\n var alreadyExists = this.getSenders().find(function (s) {\n return s.track === track;\n });\n if (alreadyExists) {\n throw new DOMException('Track already exists.', 'InvalidAccessError');\n }\n\n this._streams = this._streams || {};\n this._reverseStreams = this._reverseStreams || {};\n var oldStream = this._streams[stream.id];\n if (oldStream) {\n // this is using odd Chrome behaviour, use with caution:\n // https://bugs.chromium.org/p/webrtc/issues/detail?id=7815\n // Note: we rely on the high-level addTrack/dtmf shim to\n // create the sender with a dtmf sender.\n oldStream.addTrack(track);\n\n // Trigger ONN async.\n Promise.resolve().then(function () {\n _this13.dispatchEvent(new Event('negotiationneeded'));\n });\n } else {\n var newStream = new window.MediaStream([track]);\n this._streams[stream.id] = newStream;\n this._reverseStreams[newStream.id] = stream;\n this.addStream(newStream);\n }\n return this.getSenders().find(function (s) {\n return s.track === track;\n });\n };\n\n // replace the internal stream id with the external one and\n // vice versa.\n function replaceInternalStreamId(pc, description) {\n var sdp = description.sdp;\n Object.keys(pc._reverseStreams || []).forEach(function (internalId) {\n var externalStream = pc._reverseStreams[internalId];\n var internalStream = pc._streams[externalStream.id];\n sdp = sdp.replace(new RegExp(internalStream.id, 'g'), externalStream.id);\n });\n return new RTCSessionDescription({\n type: description.type,\n sdp: sdp\n});\n }\n function replaceExternalStreamId(pc, description) {\n var sdp = description.sdp;\n Object.keys(pc._reverseStreams || []).forEach(function (internalId) {\n var externalStream = pc._reverseStreams[internalId];\n var internalStream = pc._streams[externalStream.id];\n sdp = sdp.replace(new RegExp(externalStream.id, 'g'), internalStream.id);\n });\n return new RTCSessionDescription({\n type: description.type,\n sdp: sdp\n });\n }\n ['createOffer', 'createAnswer'].forEach(function (method) {\n var nativeMethod = window.RTCPeerConnection.prototype[method];\n var methodObj = _defineProperty({}, method, function () {\n var _this14 = this;\n\n var args = arguments;\n var isLegacyCall = arguments.length && typeof arguments[0] === 'function';\n if (isLegacyCall) {\n return nativeMethod.apply(this, [function (description) {\n var desc = replaceInternalStreamId(_this14, description);\n args[0].apply(null, [desc]);\n}, function (err) {\n if (args[1]) {\n args[1].apply(null, err);\n }\n }, arguments[2]]);\n }\n return nativeMethod.apply(this, arguments).then(function (description) {\n return replaceInternalStreamId(_this14, description);\n });\n });\n window.RTCPeerConnection.prototype[method] = methodObj[method];\n });\n\n var origSetLocalDescription = window.RTCPeerConnection.prototype.setLocalDescription;\n window.RTCPeerConnection.prototype.setLocalDescription = function setLocalDescription() {\n if (!arguments.length || !arguments[0].type) {\n return origSetLocalDescription.apply(this, arguments);\n }\n arguments[0] = replaceExternalStreamId(this, arguments[0]);\n return origSetLocalDescription.apply(this, arguments);\n };\n\n // TODO: mangle getStats: https://w3c.github.io/webrtc-stats/#dom-rtcmediastreamstats-streamidentifier\n\n var origLocalDescription = Object.getOwnPropertyDescriptor(window.RTCPeerConnection.prototype, 'localDescription');\n Object.defineProperty(window.RTCPeerConnection.prototype, 'localDescription', {\n get: function get() {\n var description = origLocalDescription.get.apply(this);\n if (description.type === '') {\n return description;\n }\n return replaceInternalStreamId(this, description);\n }\n });\n\n window.RTCPeerConnection.prototype.removeTrack = function removeTrack(sender) {\n var _this15 = this;\n\n if (this.signalingState === 'closed') {\n throw new DOMException('The RTCPeerConnection\\'s signalingState is \\'closed\\'.', 'InvalidStateError');\n }\n // We can not yet check for sender instanceof RTCRtpSender\n // since we shim RTPSender. So we check if sender._pc is set.\n if (!sender._pc) {\n throw new DOMException('Argument 1 of RTCPeerConnection.removeTrack ' + 'does not implement interface RTCRtpSender.', 'TypeError');\n }\n var isLocal = sender._pc === this;\n if (!isLocal) {\n throw new DOMException('Sender was not created by this connection.', 'InvalidAccessError');\n }\n\n // Search for the native stream the senders track belongs to.\n this._streams = this._streams || {};\n var stream = void 0;\n Object.keys(this._streams).forEach(function (streamid) {\n var hasTrack = _this15._streams[streamid].getTracks().find(function (track) {\n return sender.track === track;\n });\n if (hasTrack) {\n stream = _this15._streams[streamid];\n }\n });\n\n if (stream) {\n if (stream.getTracks().length === 1) {\n // if this is the last track of the stream, remove the stream. This\n // takes care of any shimmed _senders.\n this.removeStream(this._reverseStreams[stream.id]);\n } else {\n // relying on the same odd chrome behaviour as above.\n stream.removeTrack(sender.track);\n }\n this.dispatchEvent(new Event('negotiationneeded'));\n }\n };\n}\n\nfunction shimPeerConnection(window, browserDetails) {\n if (!window.RTCPeerConnection && window.webkitRTCPeerConnection) {\n // very basic support for old versions.\n window.RTCPeerConnection = window.webkitRTCPeerConnection;\n }\n if (!window.RTCPeerConnection) {\n return;\n }\n\n // shim implicit creation of RTCSessionDescription/RTCIceCandidate\n if (browserDetails.version < 53) {\n ['setLocalDescription', 'setRemoteDescription', 'addIceCandidate'].forEach(function (method) {\n var nativeMethod = window.RTCPeerConnection.prototype[method];\n var methodObj = _defineProperty({}, method, function () {\n arguments[0] = new (method === 'addIceCandidate' ? window.RTCIceCandidate : window.RTCSessionDescription)(arguments[0]);\n return nativeMethod.apply(this, arguments);\n });\n window.RTCPeerConnection.prototype[method] = methodObj[method];\n });\n }\n}\n\n// Attempt to fix ONN in plan-b mode.\nfunction fixNegotiationNeeded(window, browserDetails) {\n utils.wrapPeerConnectionEvent(window, 'negotiationneeded', function (e) {\nvar pc = e.target;\n if (browserDetails.version < 72 || pc.getConfiguration && pc.getConfiguration().sdpSemantics === 'plan-b') {\n if (pc.signalingState !== 'stable') {\n return;\n }\n }\n return e;\n });\n}\n\n},{\"../utils.js\":11,\"./getdisplaymedia\":4,\"./getusermedia\":5}],4:[function(require,module,exports){\n/*\n * Copyright (c) 2018 The adapter.js project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n/* eslint-env node */\n'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n value: true\n});\nexports.shimGetDisplayMedia = shimGetDisplayMedia;\nfunction shimGetDisplayMedia(window, getSourceId) {\n if (window.navigator.mediaDevices && 'getDisplayMedia' in window.navigator.mediaDevices) {\n return;\n }\n if (!window.navigator.mediaDevices) {\n return;\n }\n // getSourceId is a function that returns a promiseresolving with\n // the sourceId of the screen/window/tab to be shared.\n if (typeof getSourceId !== 'function') {\n console.error('shimGetDisplayMedia: getSourceId argument is not ' + 'a function');\n return;\n }\n window.navigator.mediaDevices.getDisplayMedia = function getDisplayMedia(constraints) {\n return getSourceId(constraints).then(function (sourceId) {\n var widthSpecified = constraints.video && constraints.video.width;\n var heightSpecified = constraints.video && constraints.video.height;\n var frameRateSpecified = constraints.video && constraints.video.frameRate;\n constraints.video = {\n mandatory: {\n chromeMediaSource: 'desktop',\n chromeMediaSourceId: sourceId,\n maxFrameRate: frameRateSpecified || 3\n }\n };\n if (widthSpecified) {\n constraints.video.mandatory.maxWidth = widthSpecified;\n }\n if (heightSpecified) {\n constraints.video.mandatory.maxHeight = heightSpecified;\n }\nreturn window.navigator.mediaDevices.getUserMedia(constraints);\n });\n };\n}\n\n},{}],5:[function(require,module,exports){\n/*\n * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n/* eslint-env node */\n'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n value: true\n});\n\nvar _typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; };\n\nexports.shimGetUserMedia = shimGetUserMedia;\n\nvar _utils = require('../utils.js');\n\nvar utils = _interopRequireWildcard(_utils);\n\nfunction _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for(var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }\n\nvar logging = utils.log;\n\nfunction shimGetUserMedia(window, browserDetails) {\n var navigator = window && window.navigator;\n\n if (!navigator.mediaDevices) {\n return;\n }\n\n var constraintsToChrome_ = function constraintsToChrome_(c) {\n if ((typeof c === 'undefined' ? 'undefined' : _typeof(c)) !== 'object' || c.mandatory || c.optional) {\n return c;\n }\n var cc = {};\n Object.keys(c).forEach(function (key) {\n if (key === 'require' || key === 'advanced' || key === 'mediaSource') {\n return;\n }\n var r = _typeof(c[key]) === 'object' ? c[key] : { ideal: c[key] };\n if (r.exact !== undefined && typeof r.exact === 'number') {\n r.min = r.max = r.exact;\n }\n var oldname_ = function oldname_(prefix, name) {\n if (prefix) {\n return prefix + name.charAt(0).toUpperCase() + name.slice(1);\n }\n return name === 'deviceId' ? 'sourceId' : name;\n };\n if (r.ideal !== undefined) {\n cc.optional = cc.optional || [];\n var oc = {};\n if (typeof r.ideal === 'number') {\n oc[oldname_('min', key)] = r.ideal;\n cc.optional.push(oc);\n oc = {};\n oc[oldname_('max', key)] = r.ideal;\n cc.optional.push(oc);\n } else {\n oc[oldname_('', key)] = r.ideal;\n cc.optional.push(oc);\n }\n }\n if (r.exact !== undefined && typeof r.exact !== 'number') {\n cc.mandatory = cc.mandatory || {};\n cc.mandatory[oldname_('', key)] = r.exact;\n } else {\n ['min', 'max'].forEach(function (mix) {\n if (r[mix] !== undefined) {\n cc.mandatory = cc.mandatory || {};\n cc.mandatory[oldname_(mix, key)] = r[mix];\n }\n });\n }\n });\n if (c.advanced) {\n cc.optional = (cc.optional || []).concat(c.advanced);\n}\n return cc;\n };\n\n var shimConstraints_ = function shimConstraints_(constraints, func) {\n if (browserDetails.version >= 61) {\n return func(constraints);\n }\n constraints = JSON.parse(JSON.stringify(constraints));\n if (constraints && _typeof(constraints.audio) === 'object') {\n var remap = function remap(obj, a, b) {\n if (a in obj && !(b in obj)) {\n obj[b] = obj[a];\n delete obj[a];\n }\n };\n constraints = JSON.parse(JSON.stringify(constraints));\n remap(constraints.audio, 'autoGainControl', 'googAutoGainControl');\n remap(constraints.audio, 'noiseSuppression', 'googNoiseSuppression');\n constraints.audio = constraintsToChrome_(constraints.audio);\n }\n if (constraints && _typeof(constraints.video) === 'object') {\n // Shim facingMode for mobile & surface pro.\n var face = constraints.video.facingMode;\n face = face && ((typeof face === 'undefined' ? 'undefined' : _typeof(face)) === 'object'? face : { ideal: face });\n var getSupportedFacingModeLies = browserDetails.version < 66;\n\n if (face && (face.exact === 'user' || face.exact === 'environment' || face.ideal === 'user' || face.ideal === 'environment') && !(navigator.mediaDevices.getSupportedConstraints && navigator.mediaDevices.getSupportedConstraints().facingMode && !getSupportedFacingModeLies)) {\n delete constraints.video.facingMode;\n var matches = void 0;\n if (face.exact === 'environment' || face.ideal === 'environment') {\n matches = ['back', 'rear'];\n } else if (face.exact === 'user' || face.ideal === 'user') {\n matches = ['front'];\n }\n if (matches) {\n // Look for matches in label, or use last cam for back (typical).\n return navigator.mediaDevices.enumerateDevices().then(function (devices) {\n devices = devices.filter(function (d) {\n return d.kind === 'videoinput';\n });\n var dev = devices.find(function (d) {\n return matches.some(function (match) {\n return d.label.toLowerCase().includes(match);\n });\n });\n if (!dev && devices.length && matches.includes('back')) {\n dev = devices[devices.length - 1]; // more likely the back cam\n }\n if (dev) {\n constraints.video.deviceId = face.exact ? { exact: dev.deviceId } : { ideal: dev.deviceId };\n }\n constraints.video = constraintsToChrome_(constraints.video);\n logging('chrome: ' + JSON.stringify(constraints));\n return func(constraints);\n });\n }\n }\n constraints.video = constraintsToChrome_(constraints.video);\n }\n logging('chrome: ' + JSON.stringify(constraints));\n return func(constraints);\n };\n\n var shimError_ = function shimError_(e) {\n if (browserDetails.version >= 64) {\n return e;\n }\n return {\n name: {\n PermissionDeniedError: 'NotAllowedError',\n PermissionDismissedError: 'NotAllowedError',\n InvalidStateError: 'NotAllowedError',\n DevicesNotFoundError: 'NotFoundError',\n ConstraintNotSatisfiedError: 'OverconstrainedError',\n TrackStartError: 'NotReadableError',\n MediaDeviceFailedDueToShutdown: 'NotAllowedError',\n MediaDeviceKillSwitchOn: 'NotAllowedError',\n TabCaptureError: 'AbortError',\n ScreenCaptureError: 'AbortError',\n DeviceCaptureError: 'AbortError'\n }[e.name] || e.name,\n message: e.message,\n constraint: e.constraint || e.constraintName,\n toString: function toString() {\n return this.name + (this.message && ': ') + this.message;\n }\n };\n };\n\n var getUserMedia_ = function getUserMedia_(constraints, onSuccess, onError) {\n shimConstraints_(constraints, function (c) {\n navigator.webkitGetUserMedia(c, onSuccess, function (e) {\n if (onError) {\n onError(shimError_(e));\n}\n });\n });\n };\n navigator.getUserMedia = getUserMedia_.bind(navigator);\n\n // Even though Chrome 45 has navigator.mediaDevices and a getUserMedia\n // function which returns a Promise, it does not accept spec-style\n // constraints.\n if (navigator.mediaDevices.getUserMedia) {\n var origGetUserMedia = navigator.mediaDevices.getUserMedia.bind(navigator.mediaDevices);\n navigator.mediaDevices.getUserMedia = function (cs) {\n return shimConstraints_(cs, function (c) {\n return origGetUserMedia(c).then(function (stream) {\n if (c.audio && !stream.getAudioTracks().length || c.video && !stream.getVideoTracks().length) {\n stream.getTracks().forEach(function (track) {\n track.stop();\n });\n throw new DOMException('', 'NotFoundError');\n }\n return stream;\n }, function (e) {\n return Promise.reject(shimError_(e));\n });\n });\n };\n }\n}\n\n},{\"../utils.js\":11}],6:[function(require,module,exports){\n/*\n * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n/* eslint-env node */\n'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n value: true\n});\n\nvar _typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; };\n\nexports.shimRTCIceCandidate = shimRTCIceCandidate;\nexports.shimMaxMessageSize = shimMaxMessageSize;\nexports.shimSendThrowTypeError = shimSendThrowTypeError;\nexports.shimConnectionState = shimConnectionState;\nexports.removeExtmapAllowMixed = removeExtmapAllowMixed;\nexports.shimAddIceCandidateNullOrEmpty = shimAddIceCandidateNullOrEmpty;\n\nvar _sdp = require('sdp');\n\nvar _sdp2 = _interopRequireDefault(_sdp);\n\nvar _utils = require('./utils');\n\nvar utils = _interopRequireWildcard(_utils);\n\nfunction _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction shimRTCIceCandidate(window) {\n // foundation is arbitrarily chosen as an indicator for full support for\n // https://w3c.github.io/webrtc-pc/#rtcicecandidate-interface\n if (!window.RTCIceCandidate || window.RTCIceCandidate && 'foundation' in window.RTCIceCandidate.prototype) {\n return;\n }\n\n var NativeRTCIceCandidate = window.RTCIceCandidate;\n window.RTCIceCandidate = function RTCIceCandidate(args) {\n // Remove the a= which shouldn't be part of the candidate string.\n if ((typeof args === 'undefined' ? 'undefined' : _typeof(args)) === 'object' && args.candidate && args.candidate.indexOf('a=') === 0) {\n args = JSON.parse(JSON.stringify(args));\n args.candidate = args.candidate.substr(2);\n }\n\n if (args.candidate && args.candidate.length) {\n // Augment the native candidate with the parsed fields.\n var nativeCandidate = new NativeRTCIceCandidate(args);\n var parsedCandidate = _sdp2.default.parseCandidate(args.candidate);\n var augmentedCandidate = Object.assign(nativeCandidate, parsedCandidate);\n\n // Add a serializer that does not serialize the extra attributes.\n augmentedCandidate.toJSON = function toJSON() {\n return {\n candidate: augmentedCandidate.candidate,\n sdpMid: augmentedCandidate.sdpMid,\n sdpMLineIndex: augmentedCandidate.sdpMLineIndex,\n usernameFragment: augmentedCandidate.usernameFragment\n };\n };\n return augmentedCandidate;\n }\n return new NativeRTCIceCandidate(args);\n };\n window.RTCIceCandidate.prototype = NativeRTCIceCandidate.prototype;\n\n // Hook up the augmented candidate in onicecandidate and\n // addEventListener('icecandidate', ...)\n utils.wrapPeerConnectionEvent(window, 'icecandidate', function (e) {\n if (e.candidate) {\n Object.defineProperty(e, 'candidate', {\n value: new window.RTCIceCandidate(e.candidate),\n writable: 'false'\n });\n }\n return e;\n });\n}\n\nfunction shimMaxMessageSize(window, browserDetails) {\n if (!window.RTCPeerConnection) {\n return;\n }\n\n if (!('sctp' in window.RTCPeerConnection.prototype)) {\n Object.defineProperty(window.RTCPeerConnection.prototype, 'sctp', {\n get: function get() {\n return typeof this._sctp === 'undefined' ? null : this._sctp;\n }\n });\n }\n\n var sctpInDescription = function sctpInDescription(description) {\n if (!description || !description.sdp) {\n return false;\n }\n var sections = _sdp2.default.splitSections(description.sdp);\n sections.shift();\n return sections.some(function (mediaSection) {\n var mLine = _sdp2.default.parseMLine(mediaSection);\n return mLine && mLine.kind === 'application' && mLine.protocol.indexOf('SCTP') !== -1;\n });\n };\n\n var getRemoteFirefoxVersion = function getRemoteFirefoxVersion(description) {\n // TODO: Is there a better solution for detecting Firefox?\n var match = description.sdp.match(/mozilla...THIS_IS_SDPARTA-(\\d+)/);\n if (match === null || match.length < 2) {\n return -1;\n }\n var version = parseInt(match[1], 10);\n // Test for NaN (yes, this is ugly)\n return version !== version ? -1 : version;\n };\n\n var getCanSendMaxMessageSize = function getCanSendMaxMessageSize(remoteIsFirefox) {\n // Every implementation we know can send at least 64 KiB.\n // Note: Although Chrome is technically able to send up to 256 KiB, the\n // data does not reach the other peer reliably.\n // See: https://bugs.chromium.org/p/webrtc/issues/detail?id=8419\n var canSendMaxMessageSize = 65536;\n if (browserDetails.browser === 'firefox') {\n if (browserDetails.version < 57) {\n if (remoteIsFirefox === -1) {\n // FF < 57 will send in 16 KiB chunks using the deprecated PPID\n // fragmentation.\n canSendMaxMessageSize = 16384;\n } else {\n // However, other FF (and RAWRTC) can reassemble PPID-fragmented\n // messages. Thus, supporting ~2 GiB when sending.\n canSendMaxMessageSize = 2147483637;\n }\n } else if (browserDetails.version < 60) {\n // Currently, all FF >= 57 will reset the remote maximum message size\n // to the default value when a data channel is created at a later\n // stage. :(\n // See: https://bugzilla.mozilla.org/show_bug.cgi?id=1426831\n canSendMaxMessageSize = browserDetails.version === 57 ? 65535 : 65536;\n } else {\n // FF >= 60 supports sending ~2 GiB\ncanSendMaxMessageSize = 2147483637;\n }\n }\n return canSendMaxMessageSize;\n };\n\n var getMaxMessageSize = function getMaxMessageSize(description, remoteIsFirefox) {\n // Note: 65536 bytes is the default value from the SDP spec. Also,\n // every implementation we know supports receiving 65536 bytes.\n var maxMessageSize = 65536;\n\n // FF 57 has a slightly incorrect default remote max message size, so\n // we need to adjust it here to avoid a failure when sending.\n // See: https://bugzilla.mozilla.org/show_bug.cgi?id=1425697\n if (browserDetails.browser === 'firefox' && browserDetails.version === 57) {\n maxMessageSize = 65535;\n }\n\n var match = _sdp2.default.matchPrefix(description.sdp, 'a=max-message-size:');\n if (match.length > 0) {\n maxMessageSize = parseInt(match[0].substr(19), 10);\n } else if (browserDetails.browser === 'firefox' && remoteIsFirefox !== -1) {\n // If the maximum message size is not present in the remote SDP and\n // both local and remote are Firefox, the remote peer can receive\n // ~2 GiB.\n maxMessageSize = 2147483637;\n }\n return maxMessageSize;\n };\n\n var origSetRemoteDescription = window.RTCPeerConnection.prototype.setRemoteDescription;\n window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription() {\n this._sctp = null;\n // Chrome decided to not expose .sctp in plan-b mode.\n // As usual, adapter.js has to do an 'ugly worakaround'\n // to cover up the mess.\n if (browserDetails.browser === 'chrome' && browserDetails.version >= 76) {\n var _getConfiguration = this.getConfiguration(),\n sdpSemantics = _getConfiguration.sdpSemantics;\n\n if (sdpSemantics === 'plan-b') {\n Object.defineProperty(this, 'sctp', {\n get: function get() {\n return typeof this._sctp === 'undefined' ? null : this._sctp;\n },\n\n enumerable: true,\n configurable: true\n });\n }\n}\n\n if (sctpInDescription(arguments[0])) {\n // Check if the remote is FF.\n var isFirefox = getRemoteFirefoxVersion(arguments[0]);\n\n // Get the maximum message size the local peer is capable of sending\n var canSendMMS = getCanSendMaxMessageSize(isFirefox);\n\n // Get the maximum message size of the remote peer.\n var remoteMMS = getMaxMessageSize(arguments[0], isFirefox);\n\n // Determine final maximum message size\n var maxMessageSize = void 0;\n if (canSendMMS === 0 && remoteMMS === 0) {\n maxMessageSize = Number.POSITIVE_INFINITY;\n } else if (canSendMMS === 0 || remoteMMS === 0) {\n maxMessageSize = Math.max(canSendMMS, remoteMMS);\n } else {\n maxMessageSize = Math.min(canSendMMS, remoteMMS);\n }\n\n // Create a dummy RTCSctpTransport object and the 'maxMessageSize'\n // attribute.\n var sctp = {};\n Object.defineProperty(sctp, 'maxMessageSize', {\n get: function get() {\n return maxMessageSize;\n }\n });\n this._sctp = sctp;\n }\n\n return origSetRemoteDescription.apply(this, arguments);\n };\n}\n\nfunction shimSendThrowTypeError(window) {\n if (!(window.RTCPeerConnection && 'createDataChannel' in window.RTCPeerConnection.prototype)) {\n return;\n }\n\n // Note: Although Firefox >= 57 has a native implementation, the maximum\n // message size can be reset for all data channels at a later stage.\n // See: https://bugzilla.mozilla.org/show_bug.cgi?id=1426831\n\n function wrapDcSend(dc, pc) {\n var origDataChannelSend = dc.send;\n dc.send = function send() {\n var data = arguments[0];\n var length = data.length || data.size || data.byteLength;\n if (dc.readyState === 'open' && pc.sctp && length > pc.sctp.maxMessageSize) {\n throw new TypeError('Message too large (can send a maximum of ' + pc.sctp.maxMessageSize + ' bytes)');\n }\n return origDataChannelSend.apply(dc, arguments);\n };\n }\n var origCreateDataChannel = window.RTCPeerConnection.prototype.createDataChannel;\n window.RTCPeerConnection.prototype.createDataChannel = function createDataChannel() {\n var dataChannel = origCreateDataChannel.apply(this, arguments);\n wrapDcSend(dataChannel, this);\n return dataChannel;\n };\n utils.wrapPeerConnectionEvent(window, 'datachannel', function (e) {\n wrapDcSend(e.channel, e.target);\n return e;\n });\n}\n\n/* shims RTCConnectionState by pretending it is the same as iceConnectionState.\n * See https://bugs.chromium.org/p/webrtc/issues/detail?id=6145#c12\n * for why this is a valid hack in Chrome. In Firefox it is slightly incorrect\n * since DTLS failures would be hidden. See\n * https://bugzilla.mozilla.org/show_bug.cgi?id=1265827\n * for the Firefox tracking bug.\n */\nfunction shimConnectionState(window) {\n if (!window.RTCPeerConnection || 'connectionState' in window.RTCPeerConnection.prototype) {\n return;\n }\n var proto = window.RTCPeerConnection.prototype;\n Object.defineProperty(proto, 'connectionState', {\n get: function get() {\n return {\n completed: 'connected',\n checking: 'connecting'\n }[this.iceConnectionState] || this.iceConnectionState;\n },\n\n enumerable: true,\n configurable: true\n });\n Object.defineProperty(proto, 'onconnectionstatechange', {\n get: function get() {\n return this._onconnectionstatechange || null;\n },\n set: function set(cb) {\n if (this._onconnectionstatechange) {\n this.removeEventListener('connectionstatechange', this._onconnectionstatechange);\n delete this._onconnectionstatechange;\n }\n if (cb) {\n this.addEventListener('connectionstatechange', this._onconnectionstatechange = cb);\n }\n },\n\n enumerable: true,\n configurable: true\n });\n\n ['setLocalDescription', 'setRemoteDescription'].forEach(function (method) {\n var origMethod = proto[method];\n proto[method] = function () {\n if (!this._connectionstatechangepoly) {\n this._connectionstatechangepoly = function (e) {\n var pc = e.target;\n if (pc._lastConnectionState !== pc.connectionState) {\n pc._lastConnectionState = pc.connectionState;\n var newEvent = new Event('connectionstatechange', e);\n pc.dispatchEvent(newEvent);\n }\n return e;\n };\n this.addEventListener('iceconnectionstatechange', this._connectionstatechangepoly);\n }\n return origMethod.apply(this, arguments);\n };\n });\n}\n\nfunction removeExtmapAllowMixed(window, browserDetails) {\n /* remove a=extmap-allow-mixed for webrtc.org < M71 */\n if (!window.RTCPeerConnection) {\n return;\n }\n if (browserDetails.browser === 'chrome' && browserDetails.version >= 71) {\n return;\n }\n if (browserDetails.browser === 'safari' && browserDetails.version >= 605) {\n return;\n }\n var nativeSRD = window.RTCPeerConnection.prototype.setRemoteDescription;\n window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription(desc) {\n if (desc && desc.sdp && desc.sdp.indexOf('\\na=extmap-allow-mixed') !== -1) {\n var sdp = desc.sdp.split('\\n').filter(function (line) {\n return line.trim() !== 'a=extmap-allow-mixed';\n }).join('\\n');\n // Safari enforces read-only-ness of RTCSessionDescription fields.\n if (window.RTCSessionDescription && desc instanceof window.RTCSessionDescription) {\n arguments[0] = new window.RTCSessionDescription({\n type: desc.type,\n sdp: sdp\n });\n } else {\n desc.sdp = sdp;\n }\n }\n return nativeSRD.apply(this, arguments);\n };\n}\n\nfunction shimAddIceCandidateNullOrEmpty(window, browserDetails) {\n // Support for addIceCandidate(null or undefined)\n // as well as addIceCandidate({candidate: \"\", ...})\n // https://bugs.chromium.org/p/chromium/issues/detail?id=978582\n // Note: must be called before other polyfills which change the signature.\n if (!(window.RTCPeerConnection && window.RTCPeerConnection.prototype)) {\n return;\n }\n var nativeAddIceCandidate = window.RTCPeerConnection.prototype.addIceCandidate;\n if (!nativeAddIceCandidate || nativeAddIceCandidate.length === 0) {\n return;\n }\n window.RTCPeerConnection.prototype.addIceCandidate = function addIceCandidate() {\n if (!arguments[0]) {\n if (arguments[1]) {\n arguments[1].apply(null);\n }\n return Promise.resolve();\n }\n // Firefox 68+ emits and processes {candidate: \"\", ...}, ignore\n // in older versions.\n // Native support for ignoring exists for Chrome M77+.\n // Safari ignores as well, exact version unknown but works in the same\n // version that also ignores addIceCandidate(null).\n if ((browserDetails.browser === 'chrome' && browserDetails.version < 78 || browserDetails.browser === 'firefox' && browserDetails.version < 68 || browserDetails.browser === 'safari') && arguments[0] && arguments[0].candidate === '') {\n return Promise.resolve();\n }\n return nativeAddIceCandidate.apply(this, arguments);\n };\n}\n\n},{\"./utils\":11,\"sdp\":12}],7:[function(require,module,exports){\n/*\n * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n/* eslint-env node */\n'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n value: true\n});\nexports.shimGetDisplayMedia = exports.shimGetUserMedia = undefined;\n\nvar _typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; };\n\nvar _getusermedia = require('./getusermedia');\n\nObject.defineProperty(exports, 'shimGetUserMedia', {\n enumerable: true,\n get: function get() {\n return _getusermedia.shimGetUserMedia;\n }\n});\n\nvar _getdisplaymedia = require('./getdisplaymedia');\n\nObject.defineProperty(exports, 'shimGetDisplayMedia', {\n enumerable: true,\n get: function get() {\n return _getdisplaymedia.shimGetDisplayMedia;\n }\n});\nexports.shimOnTrack = shimOnTrack;\nexports.shimPeerConnection = shimPeerConnection;\nexports.shimSenderGetStats = shimSenderGetStats;\nexports.shimReceiverGetStats = shimReceiverGetStats;\nexports.shimRemoveStream = shimRemoveStream;\nexports.shimRTCDataChannel = shimRTCDataChannel;\nexports.shimAddTransceiver = shimAddTransceiver;\nexports.shimGetParameters = shimGetParameters;\nexports.shimCreateOffer = shimCreateOffer;\nexports.shimCreateAnswer = shimCreateAnswer;\n\nvar _utils = require('../utils');\n\nvar utils = _interopRequireWildcard(_utils);\n\nfunction _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key]= obj[key]; } } newObj.default = obj; return newObj; } }\n\nfunction _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }\n\nfunction shimOnTrack(window) {\n if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCTrackEvent && 'receiver' in window.RTCTrackEvent.prototype && !('transceiver' in window.RTCTrackEvent.prototype)) {\n Object.defineProperty(window.RTCTrackEvent.prototype, 'transceiver', {\n get: function get() {\n return { receiver: this.receiver };\n }\n });\n }\n}\n\nfunction shimPeerConnection(window, browserDetails) {\n if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || !(window.RTCPeerConnection || window.mozRTCPeerConnection)) {\n return; // probably media.peerconnection.enabled=false in about:config\n }\n if (!window.RTCPeerConnection && window.mozRTCPeerConnection) {\n // very basic support for old versions.\n window.RTCPeerConnection = window.mozRTCPeerConnection;\n }\n\n if (browserDetails.version < 53) {\n // shim away need for obsolete RTCIceCandidate/RTCSessionDescription.\n ['setLocalDescription', 'setRemoteDescription', 'addIceCandidate'].forEach(function (method) {\n var nativeMethod = window.RTCPeerConnection.prototype[method];\n var methodObj = _defineProperty({}, method, function () {\n arguments[0] = new (method === 'addIceCandidate' ? window.RTCIceCandidate : window.RTCSessionDescription)(arguments[0]);\n return nativeMethod.apply(this, arguments);\n });\n window.RTCPeerConnection.prototype[method] = methodObj[method];\n });\n }\n\n var modernStatsTypes = {\n inboundrtp: 'inbound-rtp',\n outboundrtp: 'outbound-rtp',\n candidatepair: 'candidate-pair',\n localcandidate: 'local-candidate',\n remotecandidate: 'remote-candidate'\n };\n\n var nativeGetStats = window.RTCPeerConnection.prototype.getStats;\n window.RTCPeerConnection.prototype.getStats = function getStats() {\n var _arguments = Array.prototype.slice.call(arguments),\n selector = _arguments[0],\n onSucc = _arguments[1],\n onErr = _arguments[2];\n\n return nativeGetStats.apply(this, [selector || null]).then(function (stats) {\n if (browserDetails.version < 53 && !onSucc) {\n // Shim only promise getStats with spec-hyphens in type names\n // Leave callback version alone; misc old uses of forEach before Map\n try {\n stats.forEach(function (stat) {\n stat.type = modernStatsTypes[stat.type] || stat.type;\n });\n } catch (e) {\n if (e.name !== 'TypeError') {\n throw e;\n }\n // Avoid TypeError: \"type\" is read-only, in old versions. 34-43ish\n stats.forEach(function (stat, i) {\n stats.set(i, Object.assign({}, stat, {\n type: modernStatsTypes[stat.type] || stat.type\n }));\n });\n }\n }\n return stats;\n }).then(onSucc, onErr);\n };\n}\n\nfunction shimSenderGetStats(window) {\n if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && window.RTCRtpSender)) {\n return;\n }\n if (window.RTCRtpSender && 'getStats' in window.RTCRtpSender.prototype) {\n return;\n }\n var origGetSenders = window.RTCPeerConnection.prototype.getSenders;\n if (origGetSenders) {\n window.RTCPeerConnection.prototype.getSenders = function getSenders() {\n var _this = this;\n\n var senders = origGetSenders.apply(this, []);\n senders.forEach(function (sender) {\n return sender._pc = _this;\n });\n return senders;\n };\n }\n\n var origAddTrack = window.RTCPeerConnection.prototype.addTrack;\n if (origAddTrack) {\n window.RTCPeerConnection.prototype.addTrack = function addTrack() {\n var sender = origAddTrack.apply(this, arguments);\nsender._pc = this;\n return sender;\n };\n }\n window.RTCRtpSender.prototype.getStats = function getStats() {\n return this.track ? this._pc.getStats(this.track) : Promise.resolve(new Map());\n };\n}\n\nfunction shimReceiverGetStats(window) {\n if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && window.RTCRtpSender)) {\n return;\n }\n if (window.RTCRtpSender && 'getStats' in window.RTCRtpReceiver.prototype) {\n return;\n }\n var origGetReceivers = window.RTCPeerConnection.prototype.getReceivers;\n if (origGetReceivers) {\n window.RTCPeerConnection.prototype.getReceivers = function getReceivers() {\n var _this2 = this;\n\n var receivers = origGetReceivers.apply(this, []);\n receivers.forEach(function (receiver) {\n return receiver._pc = _this2;\n });\n return receivers;\n };\n }\n utils.wrapPeerConnectionEvent(window, 'track', function (e) {\n e.receiver._pc = e.srcElement;\nreturn e;\n });\n window.RTCRtpReceiver.prototype.getStats = function getStats() {\n return this._pc.getStats(this.track);\n };\n}\n\nfunction shimRemoveStream(window) {\n if (!window.RTCPeerConnection || 'removeStream' in window.RTCPeerConnection.prototype) {\n return;\n }\n window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {\n var _this3 = this;\n\n utils.deprecated('removeStream', 'removeTrack');\n this.getSenders().forEach(function (sender) {\n if (sender.track && stream.getTracks().includes(sender.track)) {\n _this3.removeTrack(sender);\n }\n });\n };\n}\n\nfunction shimRTCDataChannel(window) {\n // rename DataChannel to RTCDataChannel (native fix in FF60):\n // https://bugzilla.mozilla.org/show_bug.cgi?id=1173851\n if (window.DataChannel && !window.RTCDataChannel) {\n window.RTCDataChannel = window.DataChannel;\n }\n}\n\nfunction shimAddTransceiver(window) {\n // https://github.com/webrtcHacks/adapter/issues/998#issuecomment-516921647\n // Firefox ignores the init sendEncodings options passed to addTransceiver\n // https://bugzilla.mozilla.org/show_bug.cgi?id=1396918\n if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection)) {\n return;\n }\n var origAddTransceiver = window.RTCPeerConnection.prototype.addTransceiver;\n if (origAddTransceiver) {\n window.RTCPeerConnection.prototype.addTransceiver = function addTransceiver() {\n this.setParametersPromises = [];\n var initParameters = arguments[1];\n var shouldPerformCheck = initParameters && 'sendEncodings' in initParameters;\n if (shouldPerformCheck) {\n // If sendEncodings params are provided, validate grammar\n initParameters.sendEncodings.forEach(function (encodingParam) {\n if ('rid' in encodingParam) {\n var ridRegex = /^[a-z0-9]{0,16}$/i;\n if (!ridRegex.test(encodingParam.rid)) {\n throw new TypeError('Invalid RID value provided.');\n }\n }\n if ('scaleResolutionDownBy' in encodingParam) {\n if (!(parseFloat(encodingParam.scaleResolutionDownBy) >= 1.0)) {\n throw new RangeError('scale_resolution_down_by must be >= 1.0');\n }\n }\n if ('maxFramerate' in encodingParam) {\n if (!(parseFloat(encodingParam.maxFramerate) >= 0)) {\n throw new RangeError('max_framerate must be >= 0.0');\n }\n }\n });\n }\n var transceiver = origAddTransceiver.apply(this, arguments);\n if (shouldPerformCheck) {\n // Check if the init options were applied. If not we do this in an\n // asynchronous way and save the promise reference in a global object.\n // This is an ugly hack, but at the same time is way more robust than\n // checking the sender parameters before and after the createOffer\n // Also note that after the createoffer we are not 100% sure that\n // the params were asynchronously applied so we might miss the\n // opportunity to recreate offer.\n var sender = transceiver.sender;\n\n var params = sender.getParameters();\n if (!('encodings' in params) ||\n // Avoid being fooled by patched getParameters() below.\n params.encodings.length === 1 && Object.keys(params.encodings[0]).length === 0) {\n params.encodings = initParameters.sendEncodings;\n sender.sendEncodings = initParameters.sendEncodings;\n this.setParametersPromises.push(sender.setParameters(params).then(function () {\n delete sender.sendEncodings;\n }).catch(function () {\n delete sender.sendEncodings;\n }));\n }\n }\n return transceiver;\n };\n }\n}\n\nfunction shimGetParameters(window) {\n if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCRtpSender)) {\n return;\n }\n var origGetParameters = window.RTCRtpSender.prototype.getParameters;\n if (origGetParameters) {\n window.RTCRtpSender.prototype.getParameters = function getParameters() {\n var params = origGetParameters.apply(this, arguments);\n if (!('encodings' in params)) {\n params.encodings = [].concat(this.sendEncodings || [{}]);\n }\n return params;\n };\n }\n}\n\nfunction shimCreateOffer(window) {\n // https://github.com/webrtcHacks/adapter/issues/998#issuecomment-516921647\n // Firefox ignores the init sendEncodings options passed to addTransceiver\n // https://bugzilla.mozilla.org/show_bug.cgi?id=1396918\n if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection)) {\n return;\n }\n var origCreateOffer = window.RTCPeerConnection.prototype.createOffer;\n window.RTCPeerConnection.prototype.createOffer = function createOffer() {\n var _this4 = this,\n _arguments2 = arguments;\n\n if (this.setParametersPromises && this.setParametersPromises.length) {\n returnPromise.all(this.setParametersPromises).then(function () {\n return origCreateOffer.apply(_this4, _arguments2);\n }).finally(function () {\n _this4.setParametersPromises = [];\n });\n }\n return origCreateOffer.apply(this, arguments);\n };\n}\n\nfunction shimCreateAnswer(window) {\n // https://github.com/webrtcHacks/adapter/issues/998#issuecomment-516921647\n // Firefox ignores the init sendEncodings options passed to addTransceiver\n // https://bugzilla.mozilla.org/show_bug.cgi?id=1396918\n if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection)) {\n return;\n }\n var origCreateAnswer = window.RTCPeerConnection.prototype.createAnswer;\n window.RTCPeerConnection.prototype.createAnswer = function createAnswer() {\n var _this5 = this,\n _arguments3 = arguments;\n\n if (this.setParametersPromises && this.setParametersPromises.length) {\n return Promise.all(this.setParametersPromises).then(function() {\n return origCreateAnswer.apply(_this5, _arguments3);\n }).finally(function () {\n _this5.setParametersPromises = [];\n });\n }\n return origCreateAnswer.apply(this, arguments);\n };\n}\n\n},{\"../utils\":11,\"./getdisplaymedia\":8,\"./getusermedia\":9}],8:[function(require,module,exports){\n/*\n * Copyright (c) 2018 The adapter.js project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n/* eslint-env node */\n'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n value: true\n});\nexports.shimGetDisplayMedia = shimGetDisplayMedia;\nfunction shimGetDisplayMedia(window, preferredMediaSource) {\n if (window.navigator.mediaDevices && 'getDisplayMedia' in window.navigator.mediaDevices) {\n return;\n }\n if (!window.navigator.mediaDevices) {\n return;\n }\n window.navigator.mediaDevices.getDisplayMedia = function getDisplayMedia(constraints) {\n if (!(constraints && constraints.video)) {\n var err = new DOMException('getDisplayMedia without video ' + 'constraints is undefined');\n err.name = 'NotFoundError';\n // from https://heycam.github.io/webidl/#idl-DOMException-error-names\n err.code = 8;\n return Promise.reject(err);\n }\n if (constraints.video === true) {\n constraints.video = { mediaSource: preferredMediaSource };\n } else {\n constraints.video.mediaSource = preferredMediaSource;\n }\n return window.navigator.mediaDevices.getUserMedia(constraints);\n };\n}\n\n},{}],9:[function(require,module,exports){\n/*\n * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n/* eslint-env node */\n'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n value: true\n});\n\nvar _typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; };\n\nexports.shimGetUserMedia = shimGetUserMedia;\n\nvar _utils = require('../utils');\n\nvar utils = _interopRequireWildcard(_utils);\n\nfunction _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }\n\nfunction shimGetUserMedia(window, browserDetails) {\n var navigator = window && window.navigator;\n var MediaStreamTrack = window && window.MediaStreamTrack;\n\n navigator.getUserMedia = function (constraints, onSuccess, onError) {\n // Replace Firefox 44+'s deprecation warning with unprefixed version.\n utils.deprecated('navigator.getUserMedia','navigator.mediaDevices.getUserMedia');\n navigator.mediaDevices.getUserMedia(constraints).then(onSuccess, onError);\n };\n\n if (!(browserDetails.version > 55 && 'autoGainControl' in navigator.mediaDevices.getSupportedConstraints())) {\n var remap = function remap(obj, a, b) {\n if (a in obj && !(b in obj)) {\n obj[b] = obj[a];\n delete obj[a];\n }\n };\n\n var nativeGetUserMedia = navigator.mediaDevices.getUserMedia.bind(navigator.mediaDevices);\n navigator.mediaDevices.getUserMedia = function (c) {\n if ((typeof c === 'undefined' ? 'undefined' : _typeof(c)) === 'object' && _typeof(c.audio) === 'object') {\n c = JSON.parse(JSON.stringify(c));\n remap(c.audio, 'autoGainControl', 'mozAutoGainControl');\n remap(c.audio, 'noiseSuppression', 'mozNoiseSuppression');\n }\n return nativeGetUserMedia(c);\n };\n\n if (MediaStreamTrack && MediaStreamTrack.prototype.getSettings) {\n var nativeGetSettings = MediaStreamTrack.prototype.getSettings;\n MediaStreamTrack.prototype.getSettings = function () {\n var obj = nativeGetSettings.apply(this, arguments);\n remap(obj, 'mozAutoGainControl', 'autoGainControl');\n remap(obj, 'mozNoiseSuppression', 'noiseSuppression');\n return obj;\n };\n }\n\n if (MediaStreamTrack && MediaStreamTrack.prototype.applyConstraints) {\n var nativeApplyConstraints = MediaStreamTrack.prototype.applyConstraints;\n MediaStreamTrack.prototype.applyConstraints = function (c) {\n if (this.kind === 'audio' && (typeof c === 'undefined' ? 'undefined' : _typeof(c)) === 'object') {\n c = JSON.parse(JSON.stringify(c));\n remap(c, 'autoGainControl', 'mozAutoGainControl');\n remap(c, 'noiseSuppression', 'mozNoiseSuppression');\n }\n return nativeApplyConstraints.apply(this, [c]);\n };\n }\n }\n}\n\n},{\"../utils\":11}],10:[function(require,module,exports){\n/*\n * Copyright (c) 2016 The WebRTC project authors. AllRights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n value: true\n});\n\nvar _typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; };\n\nexports.shimLocalStreamsAPI = shimLocalStreamsAPI;\nexports.shimRemoteStreamsAPI = shimRemoteStreamsAPI;\nexports.shimCallbacksAPI = shimCallbacksAPI;\nexports.shimGetUserMedia = shimGetUserMedia;\nexports.shimConstraints = shimConstraints;\nexports.shimRTCIceServerUrls = shimRTCIceServerUrls;\nexports.shimTrackEventTransceiver = shimTrackEventTransceiver;\nexports.shimCreateOfferLegacy = shimCreateOfferLegacy;\nexports.shimAudioContext = shimAudioContext;\n\nvar _utils = require('../utils');\n\nvar utils = _interopRequireWildcard(_utils);\n\nfunction _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }\n\nfunction shimLocalStreamsAPI(window) {\n if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || !window.RTCPeerConnection) {\n return;\n }\n if (!('getLocalStreams' in window.RTCPeerConnection.prototype)) {\n window.RTCPeerConnection.prototype.getLocalStreams = function getLocalStreams() {\n if (!this._localStreams) {\n this._localStreams = [];\n }\n return this._localStreams;\n };\n }\n if (!('addStream' in window.RTCPeerConnection.prototype)) {\n var _addTrack = window.RTCPeerConnection.prototype.addTrack;\n window.RTCPeerConnection.prototype.addStream = function addStream(stream) {\n var _this =this;\n\n if (!this._localStreams) {\n this._localStreams = [];\n }\n if (!this._localStreams.includes(stream)) {\n this._localStreams.push(stream);\n }\n // Try to emulate Chrome's behaviour of adding in audio-video order.\n // Safari orders by track id.\n stream.getAudioTracks().forEach(function (track) {\n return _addTrack.call(_this, track, stream);\n });\n stream.getVideoTracks().forEach(function (track) {\n return _addTrack.call(_this, track, stream);\n });\n };\n\n window.RTCPeerConnection.prototype.addTrack = function addTrack(track) {\n var _this2 = this;\n\n for (var _len = arguments.length, streams = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {\n streams[_key - 1] = arguments[_key];\n }\n\n if (streams) {\n streams.forEach(function (stream) {\n if (!_this2._localStreams) {\n _this2._localStreams = [stream];\n } else if (!_this2._localStreams.includes(stream)) {\n _this2._localStreams.push(stream);\n }\n });\n }\n return _addTrack.apply(this, arguments);\n };\n }\n if (!('removeStream' in window.RTCPeerConnection.prototype)) {\n window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {\n var _this3 = this;\n\n if (!this._localStreams) {\n this._localStreams = [];\n }\n var index = this._localStreams.indexOf(stream);\n if (index === -1) {\n return;\n }\n this._localStreams.splice(index, 1);\n var tracks = stream.getTracks();\n this.getSenders().forEach(function (sender) {\n if (tracks.includes(sender.track)) {\n _this3.removeTrack(sender);\n }\n });\n };\n }\n}\n\nfunction shimRemoteStreamsAPI(window) {\n if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || !window.RTCPeerConnection) {\n return;\n }\n if (!('getRemoteStreams' in window.RTCPeerConnection.prototype)) {\n window.RTCPeerConnection.prototype.getRemoteStreams = function getRemoteStreams() {\n return this._remoteStreams ? this._remoteStreams : [];\n };\n }\n if (!('onaddstream' in window.RTCPeerConnection.prototype)) {\n Object.defineProperty(window.RTCPeerConnection.prototype, 'onaddstream', {\n get: function get() {\n return this._onaddstream;\n },\n set: function set(f) {\n var _this4 = this;\n\n if (this._onaddstream) {\n this.removeEventListener('addstream', this._onaddstream);\n this.removeEventListener('track', this._onaddstreampoly);\n }\n this.addEventListener('addstream', this._onaddstream = f);\n this.addEventListener('track', this._onaddstreampoly = function (e) {\n e.streams.forEach(function (stream) {\n if (!_this4._remoteStreams) {\n _this4._remoteStreams = [];\n }\n if (_this4._remoteStreams.includes(stream)) {\n return;\n }\n _this4._remoteStreams.push(stream);\n var event = new Event('addstream');\n event.stream = stream;\n _this4.dispatchEvent(event);\n });\n });\n }\n });\n var origSetRemoteDescription = window.RTCPeerConnection.prototype.setRemoteDescription;\n window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription() {\n var pc = this;\n if (!this._onaddstreampoly) {\n this.addEventListener('track', this._onaddstreampoly = function (e) {\n e.streams.forEach(function (stream) {\n if (!pc._remoteStreams) {\n pc._remoteStreams = [];\n }\n if (pc._remoteStreams.indexOf(stream) >= 0) {\n return;\n }\n pc._remoteStreams.push(stream);\n var event = new Event('addstream');\n event.stream = stream;\n pc.dispatchEvent(event);\n });\n });\n }\n return origSetRemoteDescription.apply(pc, arguments);\n };\n }\n}\n\nfunction shimCallbacksAPI(window) {\n if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || !window.RTCPeerConnection) {\n return;\n }\n var prototype = window.RTCPeerConnection.prototype;\n var origCreateOffer = prototype.createOffer;\n var origCreateAnswer = prototype.createAnswer;\n var setLocalDescription = prototype.setLocalDescription;\n var setRemoteDescription = prototype.setRemoteDescription;\n var addIceCandidate = prototype.addIceCandidate;\n\n prototype.createOffer = function createOffer(successCallback, failureCallback) {\n var options = arguments.length >= 2 ? arguments[2] : arguments[0];\n var promise = origCreateOffer.apply(this, [options]);\n if (!failureCallback) {\n return promise;\n }\n promise.then(successCallback, failureCallback);\n return Promise.resolve();\n };\n\n prototype.createAnswer = function createAnswer(successCallback, failureCallback) {\nvar options = arguments.length >= 2 ? arguments[2] : arguments[0];\n var promise = origCreateAnswer.apply(this, [options]);\n if (!failureCallback) {\n return promise;\n }\n promise.then(successCallback, failureCallback);\n return Promise.resolve();\n };\n\n var withCallback = function withCallback(description, successCallback, failureCallback) {\n var promise = setLocalDescription.apply(this, [description]);\n if (!failureCallback) {\n return promise;\n }\n promise.then(successCallback, failureCallback);\n return Promise.resolve();\n };\n prototype.setLocalDescription = withCallback;\n\n withCallback = function withCallback(description, successCallback, failureCallback) {\n var promise = setRemoteDescription.apply(this, [description]);\n if (!failureCallback) {\n return promise;\n }\n promise.then(successCallback, failureCallback);\n return Promise.resolve();\n };\n prototype.setRemoteDescription = withCallback;\n\n withCallback = function withCallback(candidate, successCallback, failureCallback) {\n var promise = addIceCandidate.apply(this, [candidate]);\n if (!failureCallback) {\n return promise;\n }\n promise.then(successCallback, failureCallback);\n return Promise.resolve();\n };\n prototype.addIceCandidate = withCallback;\n}\n\nfunction shimGetUserMedia(window) {\n var navigator = window && window.navigator;\n\n if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {\n // shim not needed in Safari 12.1\n var mediaDevices = navigator.mediaDevices;\n var _getUserMedia = mediaDevices.getUserMedia.bind(mediaDevices);\n navigator.mediaDevices.getUserMedia = function (constraints) {\n return _getUserMedia(shimConstraints(constraints));\n };\n }\n\n if (!navigator.getUserMedia && navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {\n navigator.getUserMedia = function getUserMedia(constraints, cb, errcb) {\n navigator.mediaDevices.getUserMedia(constraints).then(cb,errcb);\n }.bind(navigator);\n }\n}\n\nfunction shimConstraints(constraints) {\n if (constraints && constraints.video !== undefined) {\n return Object.assign({}, constraints, { video: utils.compactObject(constraints.video) });\n }\n\n return constraints;\n}\n\nfunction shimRTCIceServerUrls(window) {\n if (!window.RTCPeerConnection) {\n return;\n }\n // migrate from non-spec RTCIceServer.url to RTCIceServer.urls\n var OrigPeerConnection = window.RTCPeerConnection;\n window.RTCPeerConnection = function RTCPeerConnection(pcConfig, pcConstraints) {\n if (pcConfig && pcConfig.iceServers) {\n var newIceServers = [];\n for (var i = 0; i < pcConfig.iceServers.length; i++) {\n var server = pcConfig.iceServers[i];\n if (!server.hasOwnProperty('urls') && server.hasOwnProperty('url')) {\n utils.deprecated('RTCIceServer.url', 'RTCIceServer.urls');\n server = JSON.parse(JSON.stringify(server));\n server.urls = server.url;\n delete server.url;\n newIceServers.push(server);\n } else {\n newIceServers.push(pcConfig.iceServers[i]);\n }\n }\n pcConfig.iceServers = newIceServers;\n }\n return new OrigPeerConnection(pcConfig, pcConstraints);\n };\n window.RTCPeerConnection.prototype = OrigPeerConnection.prototype;\n // wrap static methods. Currently just generateCertificate.\n if ('generateCertificate' in OrigPeerConnection) {\n Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {\n get: function get() {\n return OrigPeerConnection.generateCertificate;\n }\n });\n }\n}\n\nfunction shimTrackEventTransceiver(window) {\n // Add event.transceiver member over deprecated event.receiver\n if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCTrackEvent && 'receiver' in window.RTCTrackEvent.prototype && !('transceiver' in window.RTCTrackEvent.prototype)) {\n Object.defineProperty(window.RTCTrackEvent.prototype, 'transceiver', {\n get: function get() {\n return { receiver: this.receiver };\n }\n });\n }\n}\n\nfunction shimCreateOfferLegacy(window) {\n var origCreateOffer = window.RTCPeerConnection.prototype.createOffer;\n window.RTCPeerConnection.prototype.createOffer = function createOffer(offerOptions) {\n if (offerOptions) {\n if (typeof offerOptions.offerToReceiveAudio !== 'undefined') {\n // support bit values\n offerOptions.offerToReceiveAudio = !!offerOptions.offerToReceiveAudio;\n }\n var audioTransceiver = this.getTransceivers().find(function (transceiver) {\n return transceiver.receiver.track.kind === 'audio';\n });\n if (offerOptions.offerToReceiveAudio === false && audioTransceiver) {\n if (audioTransceiver.direction === 'sendrecv') {\n if (audioTransceiver.setDirection) {\n audioTransceiver.setDirection('sendonly');\n } else {\n audioTransceiver.direction = 'sendonly';\n }\n } else if (audioTransceiver.direction === 'recvonly') {\n if (audioTransceiver.setDirection) {\n audioTransceiver.setDirection('inactive');\n } else {\n audioTransceiver.direction = 'inactive';\n }\n }\n } else if (offerOptions.offerToReceiveAudio === true && !audioTransceiver) {\n this.addTransceiver('audio');\n }\n\n if (typeof offerOptions.offerToReceiveVideo !== 'undefined') {\n // support bit values\n offerOptions.offerToReceiveVideo = !!offerOptions.offerToReceiveVideo;\n }\n var videoTransceiver = this.getTransceivers().find(function (transceiver) {\n return transceiver.receiver.track.kind === 'video';\n });\n if (offerOptions.offerToReceiveVideo === false && videoTransceiver) {\n if (videoTransceiver.direction === 'sendrecv') {\n if (videoTransceiver.setDirection) {\n videoTransceiver.setDirection('sendonly');\n } else {\n videoTransceiver.direction = 'sendonly';\n }\n } else if (videoTransceiver.direction === 'recvonly') {\n if (videoTransceiver.setDirection) {\n videoTransceiver.setDirection('inactive');\n } else {\n videoTransceiver.direction = 'inactive';\n }\n }\n } else if (offerOptions.offerToReceiveVideo === true && !videoTransceiver) {\n this.addTransceiver('video');\n }\n }\n return origCreateOffer.apply(this, arguments);\n };\n}\n\nfunction shimAudioContext(window) {\n if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || window.AudioContext) {\n return;\n }\n window.AudioContext = window.webkitAudioContext;\n}\n\n},{\"../utils\":11}],11:[function(require,module,exports){\n/*\n * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n/* eslint-env node */\n'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n value: true\n});\n\nvar _typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; };\n\nexports.extractVersion = extractVersion;\nexports.wrapPeerConnectionEvent = wrapPeerConnectionEvent;\nexports.disableLog = disableLog;\nexports.disableWarnings = disableWarnings;\nexports.log = log;\nexports.deprecated = deprecated;\nexports.detectBrowser = detectBrowser;\nexports.compactObject = compactObject;\nexports.walkStats = walkStats;\nexports.filterStats = filterStats;\n\nfunction _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }\n\nvar logDisabled_ = true;\nvar deprecationWarnings_ = true;\n\n/**\n * Extract browser version out of the provided user agent string.\n *\n * @param {!string} uastring userAgent string.\n * @param {!string} expr Regular expression used as match criteria.\n * @param {!number} pos position in the version string to be returned.\n * @return {!number} browser version.\n */\nfunction extractVersion(uastring, expr, pos) {\n var match = uastring.match(expr);\n return match && match.length >= pos && parseInt(match[pos], 10);\n}\n\n// Wraps the peerconnection event eventNameToWrap in a function\n// which returns the modified event object (or false to prevent\n// the event).\nfunction wrapPeerConnectionEvent(window, eventNameToWrap, wrapper) {\n if (!window.RTCPeerConnection) {\n return;\n }\n var proto = window.RTCPeerConnection.prototype;\n var nativeAddEventListener = proto.addEventListener;\n proto.addEventListener = function (nativeEventName, cb) {\n if (nativeEventName !== eventNameToWrap) {\n return nativeAddEventListener.apply(this, arguments);\n }\n var wrappedCallback = function wrappedCallback(e) {\n var modifiedEvent = wrapper(e);\n if (modifiedEvent) {\n if (cb.handleEvent) {\n cb.handleEvent(modifiedEvent);\n } else {\n cb(modifiedEvent);\n }\n }\n };\n this._eventMap = this._eventMap || {};\n if (!this._eventMap[eventNameToWrap]) {\n this._eventMap[eventNameToWrap] = new Map();\n }\n this._eventMap[eventNameToWrap].set(cb, wrappedCallback);\n return nativeAddEventListener.apply(this, [nativeEventName, wrappedCallback]);\n };\n\n var nativeRemoveEventListener = proto.removeEventListener;\n proto.removeEventListener = function (nativeEventName, cb) {\n if (nativeEventName !== eventNameToWrap || !this._eventMap || !this._eventMap[eventNameToWrap]) {\n return nativeRemoveEventListener.apply(this, arguments);\n }\n if (!this._eventMap[eventNameToWrap].has(cb)) {\n return nativeRemoveEventListener.apply(this, arguments);\n }\nvar unwrappedCb = this._eventMap[eventNameToWrap].get(cb);\n this._eventMap[eventNameToWrap].delete(cb);\n if (this._eventMap[eventNameToWrap].size === 0) {\n delete this._eventMap[eventNameToWrap];\n }\n if (Object.keys(this._eventMap).length === 0) {\n delete this._eventMap;\n }\n return nativeRemoveEventListener.apply(this, [nativeEventName, unwrappedCb]);\n };\n\n Object.defineProperty(proto, 'on' + eventNameToWrap, {\n get: function get() {\n return this['_on' + eventNameToWrap];\n },\n set: function set(cb) {\n if (this['_on' + eventNameToWrap]) {\n this.removeEventListener(eventNameToWrap, this['_on' + eventNameToWrap]);\n delete this['_on' + eventNameToWrap];\n }\n if (cb) {\n this.addEventListener(eventNameToWrap, this['_on' + eventNameToWrap] = cb);\n }\n },\n\n enumerable: true,\n configurable: true\n });\n}\n\nfunction disableLog(bool) {\n if (typeof bool !== 'boolean') {\n return new Error('Argument type: ' + (typeof bool === 'undefined' ? 'undefined' : _typeof(bool)) + '. Please use a boolean.');\n }\n logDisabled_ = bool;\n return bool ? 'adapter.js logging disabled' : 'adapter.js logging enabled';\n}\n\n/**\n * Disable or enable deprecation warnings\n * @param {!boolean} bool set to true to disable warnings.\n */\nfunction disableWarnings(bool) {\n if (typeof bool !== 'boolean') {\n return new Error('Argument type: ' + (typeof bool === 'undefined' ? 'undefined' : _typeof(bool)) + '. Please use a boolean.');\n }\n deprecationWarnings_ = !bool;\n return 'adapter.js deprecation warnings ' + (bool ? 'disabled' : 'enabled');\n}\n\nfunction log() {\n if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object') {\n if (logDisabled_) {\n return;\n }\n if (typeof console !== 'undefined' && typeof console.log === 'function') {\n console.log.apply(console, arguments);\n }\n }\n}\n\n/**\n * Shows a deprecation warning suggesting the modern and spec-compatible API.\n */\nfunction deprecated(oldMethod, newMethod) {\n if (!deprecationWarnings_) {\n return;\n }\n console.warn(oldMethod + ' is deprecated, please use ' + newMethod + ' instead.');\n}\n\n/**\n * Browser detector.\n *\n * @return {object} result containing browser and version\n * properties.\n */\nfunction detectBrowser(window) {\n // Returned result object.\n var result = { browser: null, version: null };\n\n // Fail early if it's not a browser\n if (typeof window === 'undefined' || !window.navigator) {\n result.browser = 'Not a browser.';\n return result;\n }\n\n var navigator = window.navigator;\n\n\n if (navigator.mozGetUserMedia) {\n // Firefox.\n result.browser = 'firefox';\n result.version = extractVersion(navigator.userAgent, /Firefox\\/(\\d+)\\./, 1);\n } else if (navigator.webkitGetUserMedia || window.isSecureContext === false && window.webkitRTCPeerConnection && !window.RTCIceGatherer) {\n // Chrome, Chromium, Webview, Opera.\n // Version matches Chrome/WebRTC version.\n // Chrome 74 removed webkitGetUserMedia on http as well so we need the\n // more complicated fallback to webkitRTCPeerConnection.\n result.browser = 'chrome';\n result.version = extractVersion(navigator.userAgent, /Chrom(e|ium)\\/(\\d+)\\./, 2);\n } else if (window.RTCPeerConnection && navigator.userAgent.match(/AppleWebKit\\/(\\d+)\\./)) {\n // Safari.\n result.browser = 'safari';\n result.version = extractVersion(navigator.userAgent, /AppleWebKit\\/(\\d+)\\./, 1);\n result.supportsUnifiedPlan = window.RTCRtpTransceiver && 'currentDirection' in window.RTCRtpTransceiver.prototype;\n } else {\n // Default fallthrough: not supported.\n result.browser = 'Not a supported browser.';\n return result;\n }\n\n return result;\n}\n\n/**\n * Checks if something is an object.\n *\n * @param {*} val The something you want to check.\n * @return true if val is an object, false otherwise.\n */\nfunction isObject(val) {\n return Object.prototype.toString.call(val)=== '[object Object]';\n}\n\n/**\n * Remove all empty objects and undefined values\n * from a nested object -- an enhanced and vanilla version\n * of Lodash's `compact`.\n */\nfunction compactObject(data) {\n if (!isObject(data)) {\n return data;\n }\n\n return Object.keys(data).reduce(function (accumulator, key) {\n var isObj = isObject(data[key]);\n var value = isObj ? compactObject(data[key]) : data[key];\n var isEmptyObject = isObj && !Object.keys(value).length;\n if (value === undefined || isEmptyObject) {\n return accumulator;\n }\n return Object.assign(accumulator, _defineProperty({}, key, value));\n }, {});\n}\n\n/* iterates the stats graph recursively. */\nfunction walkStats(stats, base, resultSet) {\n if (!base || resultSet.has(base.id)) {\n return;\n }\n resultSet.set(base.id, base);\n Object.keys(base).forEach(function (name) {\n if (name.endsWith('Id')) {\n walkStats(stats, stats.get(base[name]), resultSet);\n } else if (name.endsWith('Ids')) {\nbase[name].forEach(function (id) {\n walkStats(stats, stats.get(id), resultSet);\n });\n }\n });\n}\n\n/* filter getStats for a sender/receiver track. */\nfunction filterStats(result, track, outbound) {\n var streamStatsType = outbound ? 'outbound-rtp' : 'inbound-rtp';\n var filteredResult = new Map();\n if (track === null) {\n return filteredResult;\n }\n var trackStats = [];\n result.forEach(function (value) {\n if (value.type === 'track' && value.trackIdentifier === track.id) {\n trackStats.push(value);\n }\n });\n trackStats.forEach(function (trackStat) {\n result.forEach(function (stats) {\n if (stats.type === streamStatsType && stats.trackId === trackStat.id) {\n walkStats(result, stats, filteredResult);\n }\n });\n });\n return filteredResult;\n}\n\n},{}],12:[function(require,module,exports){\n/* eslint-env node */\n'use strict';\n\n// SDP helpers.\n\nvar _typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\"? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; };\n\nvar SDPUtils = {};\n\n// Generate an alphanumeric identifier for cname or mids.\n// TODO: use UUIDs instead? https://gist.github.com/jed/982883\nSDPUtils.generateIdentifier = function () {\n return Math.random().toString(36).substr(2, 10);\n};\n\n// The RTCP CNAME used by all peerconnections from the same JS.\nSDPUtils.localCName = SDPUtils.generateIdentifier();\n\n// Splits SDP into lines, dealing with both CRLF and LF.\nSDPUtils.splitLines = function (blob) {\n return blob.trim().split('\\n').map(function (line) {\n return line.trim();\n });\n};\n// Splits SDP into sessionpart and mediasections. Ensures CRLF.\nSDPUtils.splitSections = function (blob) {\n var parts = blob.split('\\nm=');\n return parts.map(function (part, index) {\n return (index > 0 ? 'm=' + part : part).trim() + '\\r\\n';\n });\n};\n\n// returns the session description.\nSDPUtils.getDescription = function (blob) {\n var sections = SDPUtils.splitSections(blob);\n return sections && sections[0];\n};\n\n// returns the individual media sections.\nSDPUtils.getMediaSections = function (blob) {\n var sections = SDPUtils.splitSections(blob);\n sections.shift();\n return sections;\n};\n\n// Returns lines that start with a certain prefix.\nSDPUtils.matchPrefix = function (blob, prefix) {\n return SDPUtils.splitLines(blob).filter(function (line) {\n return line.indexOf(prefix) === 0;\n });\n};\n\n// Parses an ICE candidate line. Sample input:\n// candidate:702786350 2 udp 41819902 8.8.8.8 60769 typ relay raddr 8.8.8.8\n// rport 55996\"\nSDPUtils.parseCandidate = function (line) {\n var parts = void 0;\n // Parse both variants.\n if (line.indexOf('a=candidate:') === 0) {\n parts = line.substring(12).split(' ');\n } else {\n parts = line.substring(10).split(' ');\n }\n\n var candidate = {\n foundation: parts[0],\n component: { 1: 'rtp', 2: 'rtcp' }[parts[1]],\n protocol: parts[2].toLowerCase(),\n priority: parseInt(parts[3], 10),\n ip: parts[4],\n address: parts[4], // address is an alias for ip.\n port: parseInt(parts[5], 10),\n // skip parts[6] == 'typ'\n type: parts[7]\n };\n\n for (var i = 8; i < parts.length; i += 2) {\n switch (parts[i]) {\n case 'raddr':\n candidate.relatedAddress = parts[i + 1];\n break;\n case 'rport':\n candidate.relatedPort = parseInt(parts[i + 1], 10);\n break;\n case 'tcptype':\n candidate.tcpType = parts[i + 1];\n break;\n case 'ufrag':\n candidate.ufrag = parts[i + 1]; // for backward compatibility.\n candidate.usernameFragment = parts[i + 1];\n break;\n default:\n // extension handling, in particular ufrag. Don't overwrite.\n if (candidate[parts[i]] === undefined) {\n candidate[parts[i]] = parts[i + 1];\n }\n break;\n }\n }\n return candidate;\n};\n\n// Translates a candidate object into SDP candidate attribute.\nSDPUtils.writeCandidate = function (candidate) {\n var sdp = [];\n sdp.push(candidate.foundation);\n\n var component = candidate.component;\n if (component === 'rtp') {\n sdp.push(1);\n } else if (component === 'rtcp') {\n sdp.push(2);\n } else {\n sdp.push(component);\n }\n sdp.push(candidate.protocol.toUpperCase());\n sdp.push(candidate.priority);\n sdp.push(candidate.address || candidate.ip);\n sdp.push(candidate.port);\n\n var type = candidate.type;\n sdp.push('typ');\n sdp.push(type);\n if (type !== 'host' && candidate.relatedAddress && candidate.relatedPort) {\n sdp.push('raddr');\n sdp.push(candidate.relatedAddress);\n sdp.push('rport');\n sdp.push(candidate.relatedPort);\n }\n if (candidate.tcpType && candidate.protocol.toLowerCase() === 'tcp') {\n sdp.push('tcptype');\n sdp.push(candidate.tcpType);\n }\n if (candidate.usernameFragment || candidate.ufrag) {\n sdp.push('ufrag');\n sdp.push(candidate.usernameFragment || candidate.ufrag);\n }\n return 'candidate:' + sdp.join(' ');\n};\n\n// Parses an ice-options line, returns an array of option tags.\n// a=ice-options:foo bar\nSDPUtils.parseIceOptions = function (line) {\n return line.substr(14).split(' ');\n};\n\n// Parses an rtpmap line, returns RTCRtpCoddecParameters. Sample input:\n// a=rtpmap:111 opus/48000/2\nSDPUtils.parseRtpMap = function (line) {\n var parts = line.substr(9).split(' ');\n var parsed = {\n payloadType: parseInt(parts.shift(), 10) // was: id\n };\n\n parts = parts[0].split('/');\n\n parsed.name = parts[0];\n parsed.clockRate = parseInt(parts[1], 10); // was: clockrate\n parsed.channels = parts.length === 3 ? parseInt(parts[2], 10) : 1;\n // legacy alias, got renamed back to channels in ORTC.\n parsed.numChannels = parsed.channels;\n return parsed;\n};\n\n// Generate an a=rtpmap line from RTCRtpCodecCapability or\n// RTCRtpCodecParameters.\nSDPUtils.writeRtpMap = function (codec) {\n var pt =codec.payloadType;\n if (codec.preferredPayloadType !== undefined) {\n pt = codec.preferredPayloadType;\n }\n var channels = codec.channels || codec.numChannels || 1;\n return 'a=rtpmap:' + pt + ' ' + codec.name + '/' + codec.clockRate + (channels !== 1 ? '/' + channels : '') + '\\r\\n';\n};\n\n// Parses an a=extmap line (headerextension from RFC 5285). Sample input:\n// a=extmap:2 urn:ietf:params:rtp-hdrext:toffset\n// a=extmap:2/sendonly urn:ietf:params:rtp-hdrext:toffset\nSDPUtils.parseExtmap = function (line) {\n var parts = line.substr(9).split(' ');\n return {\n id: parseInt(parts[0], 10),\n direction: parts[0].indexOf('/') > 0 ? parts[0].split('/')[1] : 'sendrecv',\n uri: parts[1]\n };\n};\n\n// Generates a=extmap line from RTCRtpHeaderExtensionParameters or\n// RTCRtpHeaderExtension.\nSDPUtils.writeExtmap = function (headerExtension) {\n return 'a=extmap:' + (headerExtension.id || headerExtension.preferredId) + (headerExtension.direction && headerExtension.direction !== 'sendrecv' ? '/' + headerExtension.direction : '') + ' ' + headerExtension.uri + '\\r\\n';\n};\n\n// Parses an ftmp line, returns dictionary. Sample input:\n// a=fmtp:96 vbr=on;cng=on\n// Also deals with vbr=on; cng=on\nSDPUtils.parseFmtp = function (line) {\n var parsed = {};\n var kv = void 0;\n var parts = line.substr(line.indexOf(' ') + 1).split(';');\n for (var j = 0; j < parts.length; j++) {\n kv = parts[j].trim().split('=');\n parsed[kv[0].trim()] = kv[1];\n }\n return parsed;\n};\n\n// Generates an a=ftmp line from RTCRtpCodecCapability or RTCRtpCodecParameters.\nSDPUtils.writeFmtp = function (codec) {\n var line = '';\n var pt = codec.payloadType;\n if (codec.preferredPayloadType !== undefined) {\n pt = codec.preferredPayloadType;\n }\n if (codec.parameters && Object.keys(codec.parameters).length) {\n var params = [];\n Object.keys(codec.parameters).forEach(function (param) {\n if (codec.parameters[param]) {\n params.push(param + '=' + codec.parameters[param]);\n }else {\n params.push(param);\n }\n });\n line += 'a=fmtp:' + pt + ' ' + params.join(';') + '\\r\\n';\n }\n return line;\n};\n\n// Parses an rtcp-fb line, returns RTCPRtcpFeedback object. Sample input:\n// a=rtcp-fb:98 nack rpsi\nSDPUtils.parseRtcpFb = function (line) {\n var parts = line.substr(line.indexOf(' ') + 1).split(' ');\n return {\n type: parts.shift(),\n parameter: parts.join(' ')\n };\n};\n// Generate a=rtcp-fb lines from RTCRtpCodecCapability or RTCRtpCodecParameters.\nSDPUtils.writeRtcpFb = function (codec) {\n var lines = '';\n var pt = codec.payloadType;\n if (codec.preferredPayloadType !== undefined) {\n pt = codec.preferredPayloadType;\n }\n if (codec.rtcpFeedback && codec.rtcpFeedback.length) {\n // FIXME: special handling for trr-int?\n codec.rtcpFeedback.forEach(function (fb) {\n lines += 'a=rtcp-fb:' + pt + ' ' + fb.type + (fb.parameter && fb.parameter.length ? ' ' + fb.parameter : '') + '\\r\\n';\n });\n }\n return lines;\n};\n\n// Parses an RFC 5576 ssrc media attribute. Sample input:\n// a=ssrc:3735928559 cname:something\nSDPUtils.parseSsrcMedia = function (line) {\n var sp = line.indexOf(' ');\n var parts = {\n ssrc: parseInt(line.substr(7, sp - 7), 10)\n };\n var colon = line.indexOf(':', sp);\n if (colon > -1) {\n parts.attribute = line.substr(sp + 1, colon - sp - 1);\n parts.value = line.substr(colon + 1);\n } else {\n parts.attribute = line.substr(sp + 1);\n }\n return parts;\n};\n\nSDPUtils.parseSsrcGroup = function (line) {\n var parts = line.substr(13).split(' ');\n return {\n semantics: parts.shift(),\n ssrcs: parts.map(function (ssrc) {\n return parseInt(ssrc, 10);\n })\n };\n};\n\n// Extracts the MID (RFC 5888) from a media section.\n// returns the MID or undefined if no mid line was found.\nSDPUtils.getMid = function (mediaSection) {\n var mid = SDPUtils.matchPrefix(mediaSection, 'a=mid:')[0];\n if (mid) {\n return mid.substr(6);\n }\n};\n\nSDPUtils.parseFingerprint = function (line) {\n var parts = line.substr(14).split(' ');\n return {\n algorithm: parts[0].toLowerCase(), // algorithm is case-sensitive in Edge.\n value: parts[1]\n };\n};\n\n// Extracts DTLS parameters from SDP media section or sessionpart.\n// FIXME: for consistency with other functions this should only\n// get the fingerprint line as input. See also getIceParameters.\nSDPUtils.getDtlsParameters = function (mediaSection, sessionpart) {\n var lines = SDPUtils.matchPrefix(mediaSection + sessionpart, 'a=fingerprint:');\n // Note: a=setup line is ignored since we use the 'auto' role.\n // Note2: 'algorithm' is not case sensitive except in Edge.\n return {\n role: 'auto',\n fingerprints: lines.map(SDPUtils.parseFingerprint)\n };\n};\n\n// Serializes DTLS parameters to SDP.\nSDPUtils.writeDtlsParameters = function (params, setupType) {\n var sdp = 'a=setup:' + setupType + '\\r\\n';\n params.fingerprints.forEach(function (fp) {\n sdp += 'a=fingerprint:' + fp.algorithm + ' ' + fp.value + '\\r\\n';\n });\n return sdp;\n};\n\n// Parses a=crypto lines into\n// https://rawgit.com/aboba/edgertc/master/msortc-rs4.html#dictionary-rtcsrtpsdesparameters-members\nSDPUtils.parseCryptoLine = function (line) {\n var parts = line.substr(9).split(' ');\n return {\n tag: parseInt(parts[0], 10),\n cryptoSuite: parts[1],\n keyParams: parts[2],\n sessionParams: parts.slice(3)\n };\n};\n\nSDPUtils.writeCryptoLine = function (parameters) {\n return 'a=crypto:' + parameters.tag + ' ' + parameters.cryptoSuite + ' ' + (_typeof(parameters.keyParams) === 'object' ? SDPUtils.writeCryptoKeyParams(parameters.keyParams) : parameters.keyParams) + (parameters.sessionParams ? ' ' + parameters.sessionParams.join(' ') : '') + '\\r\\n';\n};\n\n// Parses the crypto key parameters into\n// https://rawgit.com/aboba/edgertc/master/msortc-rs4.html#rtcsrtpkeyparam*\nSDPUtils.parseCryptoKeyParams = function (keyParams) {\n if (keyParams.indexOf('inline:') !== 0) {\n return null;\n }\n var parts = keyParams.substr(7).split('|');\n return {\n keyMethod: 'inline',\n keySalt: parts[0],\n lifeTime: parts[1],\n mkiValue: parts[2] ? parts[2].split(':')[0] : undefined,\n mkiLength: parts[2] ? parts[2].split(':')[1] : undefined\n };\n};\n\nSDPUtils.writeCryptoKeyParams = function (keyParams) {\n return keyParams.keyMethod + ':' + keyParams.keySalt + (keyParams.lifeTime ? '|' + keyParams.lifeTime : '') + (keyParams.mkiValue && keyParams.mkiLength ? '|' + keyParams.mkiValue + ':' + keyParams.mkiLength : '');\n};\n\n// Extracts all SDES parameters.\nSDPUtils.getCryptoParameters = function (mediaSection, sessionpart) {\n var lines = SDPUtils.matchPrefix(mediaSection + sessionpart, 'a=crypto:');\n return lines.map(SDPUtils.parseCryptoLine);\n};\n\n// Parses ICE information from SDP media section or sessionpart.\n// FIXME: for consistency with other functions this should only\n// get the ice-ufrag and ice-pwd lines as input.\nSDPUtils.getIceParameters = function (mediaSection, sessionpart) {\n var ufrag = SDPUtils.matchPrefix(mediaSection + sessionpart, 'a=ice-ufrag:')[0];\n var pwd = SDPUtils.matchPrefix(mediaSection + sessionpart, 'a=ice-pwd:')[0];\n if (!(ufrag && pwd)) {\n return null;\n }\n return {\n usernameFragment: ufrag.substr(12),\n password: pwd.substr(10)\n };\n};\n\n// Serializes ICE parameters to SDP.\nSDPUtils.writeIceParameters = function (params) {\n var sdp = 'a=ice-ufrag:' + params.usernameFragment + '\\r\\n' + 'a=ice-pwd:' + params.password + '\\r\\n';\n if (params.iceLite) {\n sdp += 'a=ice-lite\\r\\n';\n }\n return sdp;\n};\n\n// Parses the SDP media section and returns RTCRtpParameters.\nSDPUtils.parseRtpParameters = function (mediaSection) {\n var description = {\n codecs: [],\n headerExtensions: [],\n fecMechanisms: [],\n rtcp: []\n };\n var lines = SDPUtils.splitLines(mediaSection);\n var mline = lines[0].split(' ');\n for (var i = 3; i < mline.length; i++) {\n // find all codecs from mline[3..]\n var pt = mline[i];\n var rtpmapline = SDPUtils.matchPrefix(mediaSection, 'a=rtpmap:' + pt + ' ')[0];\n if (rtpmapline) {\n var codec = SDPUtils.parseRtpMap(rtpmapline);\n var fmtps = SDPUtils.matchPrefix(mediaSection, 'a=fmtp:' + pt + ' ');\n // Only the first a=fmtp:<pt> is considered.\n codec.parameters = fmtps.length ? SDPUtils.parseFmtp(fmtps[0]) : {};\n codec.rtcpFeedback = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-fb:' + pt + ' ').map(SDPUtils.parseRtcpFb);\n description.codecs.push(codec);\n // parse FEC mechanisms from rtpmap lines.\n switch (codec.name.toUpperCase()) {\n case 'RED':\n case 'ULPFEC':\n description.fecMechanisms.push(codec.name.toUpperCase());\n break;\n default:\n // only RED and ULPFEC are recognized as FEC mechanisms.\n break;\n }\n }\n }\n SDPUtils.matchPrefix(mediaSection, 'a=extmap:').forEach(function (line) {\n description.headerExtensions.push(SDPUtils.parseExtmap(line));\n });\n // FIXME: parse rtcp.\nreturn description;\n};\n\n// Generates parts of the SDP media section describing the capabilities /\n// parameters.\nSDPUtils.writeRtpDescription = function (kind, caps) {\n var sdp = '';\n\n // Build the mline.\n sdp += 'm=' + kind + ' ';\n sdp += caps.codecs.length > 0 ? '9' : '0'; // reject if no codecs.\n sdp += ' UDP/TLS/RTP/SAVPF ';\n sdp += caps.codecs.map(function (codec) {\n if (codec.preferredPayloadType !== undefined) {\n return codec.preferredPayloadType;\n }\n return codec.payloadType;\n }).join(' ') + '\\r\\n';\n\n sdp += 'c=IN IP4 0.0.0.0\\r\\n';\n sdp += 'a=rtcp:9 IN IP4 0.0.0.0\\r\\n';\n\n // Add a=rtpmap lines for each codec. Also fmtp and rtcp-fb.\n caps.codecs.forEach(function (codec) {\n sdp += SDPUtils.writeRtpMap(codec);\n sdp += SDPUtils.writeFmtp(codec);\n sdp += SDPUtils.writeRtcpFb(codec);\n });\n var maxptime = 0;\n caps.codecs.forEach(function (codec) {\n if (codec.maxptime > maxptime) {\n maxptime = codec.maxptime;\n }\n });\n if (maxptime > 0) {\n sdp += 'a=maxptime:' + maxptime + '\\r\\n';\n }\n\n if (caps.headerExtensions) {\n caps.headerExtensions.forEach(function (extension) {\n sdp += SDPUtils.writeExtmap(extension);\n });\n }\n // FIXME: write fecMechanisms.\n return sdp;\n};\n\n// Parses the SDP media section and returns an array of\n// RTCRtpEncodingParameters.\nSDPUtils.parseRtpEncodingParameters = function (mediaSection) {\n var encodingParameters = [];\n var description = SDPUtils.parseRtpParameters(mediaSection);\n var hasRed = description.fecMechanisms.indexOf('RED') !== -1;\n var hasUlpfec = description.fecMechanisms.indexOf('ULPFEC') !== -1;\n\n // filter a=ssrc:... cname:, ignore PlanB-msid\n var ssrcs = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:').map(function (line) {\n return SDPUtils.parseSsrcMedia(line);\n }).filter(function (parts) {\n return parts.attribute === 'cname';\n });\n var primarySsrc = ssrcs.length > 0 && ssrcs[0].ssrc;\n var secondarySsrc = void 0;\n\n var flows = SDPUtils.matchPrefix(mediaSection, 'a=ssrc-group:FID').map(function (line) {\n var parts = line.substr(17).split(' ');\n return parts.map(function (part) {\n return parseInt(part, 10);\n });\n });\n if (flows.length > 0 && flows[0].length > 1 && flows[0][0] === primarySsrc) {\n secondarySsrc = flows[0][1];\n }\n\n description.codecs.forEach(function (codec) {\n if (codec.name.toUpperCase() === 'RTX' && codec.parameters.apt) {\n var encParam = {\n ssrc: primarySsrc,\n codecPayloadType: parseInt(codec.parameters.apt, 10)\n };\n if (primarySsrc && secondarySsrc) {\n encParam.rtx = { ssrc: secondarySsrc };\n }\n encodingParameters.push(encParam);\n if (hasRed) {\n encParam = JSON.parse(JSON.stringify(encParam));\n encParam.fec = {\n ssrc: primarySsrc,\n mechanism: hasUlpfec ? 'red+ulpfec' : 'red'\n };\n encodingParameters.push(encParam);\n }\n }\n });\n if (encodingParameters.length === 0 && primarySsrc) {\n encodingParameters.push({\n ssrc: primarySsrc\n });\n }\n\n // we support both b=AS and b=TIAS but interpret AS as TIAS.\n var bandwidth = SDPUtils.matchPrefix(mediaSection, 'b=');\n if (bandwidth.length) {\n if (bandwidth[0].indexOf('b=TIAS:') === 0) {\n bandwidth = parseInt(bandwidth[0].substr(7), 10);\n } else if (bandwidth[0].indexOf('b=AS:') === 0) {\n // use formula from JSEP to convert b=AS to TIAS value.\n bandwidth = parseInt(bandwidth[0].substr(5), 10) * 1000 * 0.95 - 50 * 40 * 8;\n } else {\n bandwidth = undefined;\n }\n encodingParameters.forEach(function (params) {\n params.maxBitrate = bandwidth;\n });\n }\n return encodingParameters;\n};\n\n// parses http://draft.ortc.org/#rtcrtcpparameters*\nSDPUtils.parseRtcpParameters = function (mediaSection) {\n var rtcpParameters = {};\n\n // Gets the first SSRC. 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