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/**
* Description of import/upgrade into Moodle:
*
* 1. Visit https://github.com/webrtc/adapter/releases.
* 2. Check if the version has been updated from what is listed in lib/thirdpartylibs.xml in the Moodle wwwroot.
* 3. If it has -
* 1. Download the source code.
* 2. Copy the content of the file release/adapter.js from the archive (ignore the first line).
* 3. Replace the content below "return (function e(t,n,r) .." in this file with the content you copied.
* 4. Ensure to update lib/thirdpartylibs.xml with any changes.
*/
// ESLint directives.
/* eslint-disable */
// JSHint directives.
/* jshint ignore:start */
define([], function() {
return (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){
/*
* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree.
*/
/* eslint-env node */
'use strict';
var SDPUtils = require('sdp');
function fixStatsType(stat) {
return {
inboundrtp: 'inbound-rtp',
outboundrtp: 'outbound-rtp',
candidatepair: 'candidate-pair',
localcandidate: 'local-candidate',
remotecandidate: 'remote-candidate'
}[stat.type] || stat.type;
}
function writeMediaSection(transceiver, caps, type, stream, dtlsRole) {
var sdp = SDPUtils.writeRtpDescription(transceiver.kind, caps);
// Map ICE parameters (ufrag, pwd) to SDP.
sdp += SDPUtils.writeIceParameters(
transceiver.iceGatherer.getLocalParameters());
// Map DTLS parameters to SDP.
sdp += SDPUtils.writeDtlsParameters(
transceiver.dtlsTransport.getLocalParameters(),
type === 'offer' ? 'actpass' : dtlsRole || 'active');
sdp += 'a=mid:' + transceiver.mid + '\r\n';
if (transceiver.rtpSender && transceiver.rtpReceiver) {
sdp += 'a=sendrecv\r\n';
} else if (transceiver.rtpSender) {
sdp += 'a=sendonly\r\n';
} else if (transceiver.rtpReceiver) {
sdp += 'a=recvonly\r\n';
} else {
sdp += 'a=inactive\r\n';
}
if (transceiver.rtpSender) {
var trackId = transceiver.rtpSender._initialTrackId ||
transceiver.rtpSender.track.id;
transceiver.rtpSender._initialTrackId = trackId;
// spec.
var msid = 'msid:' + (stream ? stream.id : '-') + ' ' +
trackId + '\r\n';
sdp += 'a=' + msid;
// for Chrome. Legacy should no longer be required.
sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc +
' ' + msid;
// RTX
if (transceiver.sendEncodingParameters[0].rtx) {
sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].rtx.ssrc +
' ' + msid;
sdp += 'a=ssrc-group:FID ' +
transceiver.sendEncodingParameters[0].ssrc + ' ' +
transceiver.sendEncodingParameters[0].rtx.ssrc +
'\r\n';
}
}
// FIXME: this should be written by writeRtpDescription.
sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc +
' cname:' + SDPUtils.localCName + '\r\n';
if (transceiver.rtpSender && transceiver.sendEncodingParameters[0].rtx) {
sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].rtx.ssrc +
' cname:' + SDPUtils.localCName + '\r\n';
}
return sdp;
}
// Edge does not like
// 1) stun: filtered after 14393 unless ?transport=udp is present
// 2) turn: that does not have all of turn:host:port?transport=udp
// 3) turn: with ipv6 addresses
// 4) turn: occurring muliple times
function filterIceServers(iceServers, edgeVersion) {
var hasTurn = false;
iceServers = JSON.parse(JSON.stringify(iceServers));
return iceServers.filter(function(server) {
if (server && (server.urls || server.url)) {
var urls = server.urls || server.url;
if (server.url && !server.urls) {
console.warn('RTCIceServer.url is deprecated! Use urls instead.');
}
var isString = typeof urls === 'string';
if (isString) {
urls = [urls];
}
urls = urls.filter(function(url) {
var validTurn = url.indexOf('turn:') === 0 &&
url.indexOf('transport=udp') !== -1 &&
url.indexOf('turn:[') === -1 &&
!hasTurn;
if (validTurn) {
hasTurn = true;
return true;
}
return url.indexOf('stun:') === 0 && edgeVersion >= 14393 &&
url.indexOf('?transport=udp') === -1;
});
delete server.url;
server.urls = isString ? urls[0] : urls;
return !!urls.length;
}
});
}
// Determines the intersection of local and remote capabilities.
function getCommonCapabilities(localCapabilities, remoteCapabilities) {
var commonCapabilities = {
codecs: [],
headerExtensions: [],
fecMechanisms: []
};
var findCodecByPayloadType = function(pt, codecs) {
pt = parseInt(pt, 10);
for (var i = 0; i < codecs.length; i++) {
if (codecs[i].payloadType === pt ||
codecs[i].preferredPayloadType === pt) {
return codecs[i];
}
}
};
var rtxCapabilityMatches = function(lRtx, rRtx, lCodecs, rCodecs) {
var lCodec = findCodecByPayloadType(lRtx.parameters.apt, lCodecs);
var rCodec = findCodecByPayloadType(rRtx.parameters.apt, rCodecs);
return lCodec && rCodec &&
lCodec.name.toLowerCase() === rCodec.name.toLowerCase();
};
localCapabilities.codecs.forEach(function(lCodec) {
for (var i = 0; i < remoteCapabilities.codecs.length; i++) {
var rCodec = remoteCapabilities.codecs[i];
if (lCodec.name.toLowerCase() === rCodec.name.toLowerCase() &&
lCodec.clockRate === rCodec.clockRate) {
if (lCodec.name.toLowerCase() === 'rtx' &&
lCodec.parameters && rCodec.parameters.apt) {
// for RTX we need to find the local rtx that has a apt
// which points to the same local codec as the remote one.
if (!rtxCapabilityMatches(lCodec, rCodec,
localCapabilities.codecs, remoteCapabilities.codecs)) {
continue;
}
}
rCodec = JSON.parse(JSON.stringify(rCodec)); // deepcopy
// number of channels is the highest common number of channels
rCodec.numChannels = Math.min(lCodec.numChannels,
rCodec.numChannels);
// push rCodec so we reply with offerer payload type
commonCapabilities.codecs.push(rCodec);
// determine common feedback mechanisms
rCodec.rtcpFeedback = rCodec.rtcpFeedback.filter(function(fb) {
for (var j = 0; j < lCodec.rtcpFeedback.length; j++) {
if (lCodec.rtcpFeedback[j].type === fb.type &&
lCodec.rtcpFeedback[j].parameter === fb.parameter) {
return true;
}
}
return false;
});
// FIXME: also need to determine .parameters
// see https://github.com/openpeer/ortc/issues/569
break;
}
}
});
localCapabilities.headerExtensions.forEach(function(lHeaderExtension) {
for (var i = 0; i < remoteCapabilities.headerExtensions.length;
i++) {
var rHeaderExtension = remoteCapabilities.headerExtensions[i];
if (lHeaderExtension.uri === rHeaderExtension.uri) {
commonCapabilities.headerExtensions.push(rHeaderExtension);
break;
}
}
});
// FIXME: fecMechanisms
return commonCapabilities;
}
// is action=setLocalDescription with type allowed in signalingState
function isActionAllowedInSignalingState(action, type, signalingState) {
return {
offer: {
setLocalDescription: ['stable', 'have-local-offer'],
setRemoteDescription: ['stable', 'have-remote-offer']
},
answer: {
setLocalDescription: ['have-remote-offer', 'have-local-pranswer'],
setRemoteDescription: ['have-local-offer', 'have-remote-pranswer']
}
}[type][action].indexOf(signalingState) !== -1;
}
function maybeAddCandidate(iceTransport, candidate) {
// Edge's internal representation adds some fields therefore
// not all fieldѕ are taken into account.
var alreadyAdded = iceTransport.getRemoteCandidates()
.find(function(remoteCandidate) {
return candidate.foundation === remoteCandidate.foundation &&
candidate.ip === remoteCandidate.ip &&
candidate.port === remoteCandidate.port &&
candidate.priority === remoteCandidate.priority &&
candidate.protocol === remoteCandidate.protocol &&
candidate.type === remoteCandidate.type;
});
if (!alreadyAdded) {
iceTransport.addRemoteCandidate(candidate);
}
return !alreadyAdded;
}
function makeError(name, description) {
var e = new Error(description);
e.name = name;
// legacy error codes from https://heycam.github.io/webidl/#idl-DOMException-error-names
e.code = {
NotSupportedError: 9,
InvalidStateError: 11,
InvalidAccessError: 15,
TypeError: undefined,
OperationError: undefined
}[name];
return e;
}
module.exports = function(window, edgeVersion) {
// https://w3c.github.io/mediacapture-main/#mediastream
// Helper function to add the track to the stream and
// dispatch the event ourselves.
function addTrackToStreamAndFireEvent(track, stream) {
stream.addTrack(track);
stream.dispatchEvent(new window.MediaStreamTrackEvent('addtrack',
{track: track}));
}
function removeTrackFromStreamAndFireEvent(track, stream) {
stream.removeTrack(track);
stream.dispatchEvent(new window.MediaStreamTrackEvent('removetrack',
{track: track}));
}
function fireAddTrack(pc, track, receiver, streams) {
var trackEvent = new Event('track');
trackEvent.track = track;
trackEvent.receiver = receiver;
trackEvent.transceiver = {receiver: receiver};
trackEvent.streams = streams;
window.setTimeout(function() {
pc._dispatchEvent('track', trackEvent);
});
}
var RTCPeerConnection = function(config) {
var pc = this;
var _eventTarget = document.createDocumentFragment();
['addEventListener', 'removeEventListener', 'dispatchEvent']
.forEach(function(method) {
pc[method] = _eventTarget[method].bind(_eventTarget);
});
this.canTrickleIceCandidates = null;
this.needNegotiation = false;
this.localStreams = [];
this.remoteStreams = [];
this._localDescription = null;
this._remoteDescription = null;
this.signalingState = 'stable';
this.iceConnectionState = 'new';
this.connectionState = 'new';
this.iceGatheringState = 'new';
config = JSON.parse(JSON.stringify(config || {}));
this.usingBundle = config.bundlePolicy === 'max-bundle';
if (config.rtcpMuxPolicy === 'negotiate') {
throw(makeError('NotSupportedError',
'rtcpMuxPolicy \'negotiate\' is not supported'));
} else if (!config.rtcpMuxPolicy) {
config.rtcpMuxPolicy = 'require';
}
switch (config.iceTransportPolicy) {
case 'all':
case 'relay':
break;
default:
config.iceTransportPolicy = 'all';
break;
}
switch (config.bundlePolicy) {
case 'balanced':
case 'max-compat':
case 'max-bundle':
break;
default:
config.bundlePolicy = 'balanced';
break;
}
config.iceServers = filterIceServers(config.iceServers || [], edgeVersion);
this._iceGatherers = [];
if (config.iceCandidatePoolSize) {
for (var i = config.iceCandidatePoolSize; i > 0; i--) {
this._iceGatherers.push(new window.RTCIceGatherer({
iceServers: config.iceServers,
gatherPolicy: config.iceTransportPolicy
}));
}
} else {
config.iceCandidatePoolSize = 0;
}
this._config = config;
// per-track iceGathers, iceTransports, dtlsTransports, rtpSenders, ...
// everything that is needed to describe a SDP m-line.
this.transceivers = [];
this._sdpSessionId = SDPUtils.generateSessionId();
this._sdpSessionVersion = 0;
this._dtlsRole = undefined; // role for a=setup to use in answers.
this._isClosed = false;
};
Object.defineProperty(RTCPeerConnection.prototype, 'localDescription', {
configurable: true,
get: function() {
return this._localDescription;
}
});
Object.defineProperty(RTCPeerConnection.prototype, 'remoteDescription', {
configurable: true,
get: function() {
return this._remoteDescription;
}
});
// set up event handlers on prototype
RTCPeerConnection.prototype.onicecandidate = null;
RTCPeerConnection.prototype.onaddstream = null;
RTCPeerConnection.prototype.ontrack = null;
RTCPeerConnection.prototype.onremovestream = null;
RTCPeerConnection.prototype.onsignalingstatechange = null;
RTCPeerConnection.prototype.oniceconnectionstatechange = null;
RTCPeerConnection.prototype.onconnectionstatechange = null;
RTCPeerConnection.prototype.onicegatheringstatechange = null;
RTCPeerConnection.prototype.onnegotiationneeded = null;
RTCPeerConnection.prototype.ondatachannel = null;
RTCPeerConnection.prototype._dispatchEvent = function(name, event) {
if (this._isClosed) {
return;
}
this.dispatchEvent(event);
if (typeof this['on' + name] === 'function') {
this['on' + name](event);
}
};
RTCPeerConnection.prototype._emitGatheringStateChange = function() {
var event = new Event('icegatheringstatechange');
this._dispatchEvent('icegatheringstatechange', event);
};
RTCPeerConnection.prototype.getConfiguration = function() {
return this._config;
};
RTCPeerConnection.prototype.getLocalStreams = function() {
return this.localStreams;
};
RTCPeerConnection.prototype.getRemoteStreams = function() {
return this.remoteStreams;
};
// internal helper to create a transceiver object.
// (which is not yet the same as the WebRTC 1.0 transceiver)
RTCPeerConnection.prototype._createTransceiver = function(kind, doNotAdd) {
var hasBundleTransport = this.transceivers.length > 0;
var transceiver = {
track: null,
iceGatherer: null,
iceTransport: null,
dtlsTransport: null,
localCapabilities: null,
remoteCapabilities: null,
rtpSender: null,
rtpReceiver: null,
kind: kind,
mid: null,
sendEncodingParameters: null,
recvEncodingParameters: null,
stream: null,
associatedRemoteMediaStreams: [],
wantReceive: true
};
if (this.usingBundle && hasBundleTransport) {
transceiver.iceTransport = this.transceivers[0].iceTransport;
transceiver.dtlsTransport = this.transceivers[0].dtlsTransport;
} else {
var transports = this._createIceAndDtlsTransports();
transceiver.iceTransport = transports.iceTransport;
transceiver.dtlsTransport = transports.dtlsTransport;
}
if (!doNotAdd) {
this.transceivers.push(transceiver);
}
return transceiver;
};
RTCPeerConnection.prototype.addTrack = function(track, stream) {
if (this._isClosed) {
throw makeError('InvalidStateError',
'Attempted to call addTrack on a closed peerconnection.');
}
var alreadyExists = this.transceivers.find(function(s) {
return s.track === track;
});
if (alreadyExists) {
throw makeError('InvalidAccessError', 'Track already exists.');
}
var transceiver;
for (var i = 0; i < this.transceivers.length; i++) {
if (!this.transceivers[i].track &&
this.transceivers[i].kind === track.kind) {
transceiver = this.transceivers[i];
}
}
if (!transceiver) {
transceiver = this._createTransceiver(track.kind);
}
this._maybeFireNegotiationNeeded();
if (this.localStreams.indexOf(stream) === -1) {
this.localStreams.push(stream);
}
transceiver.track = track;
transceiver.stream = stream;
transceiver.rtpSender = new window.RTCRtpSender(track,
transceiver.dtlsTransport);
return transceiver.rtpSender;
};
RTCPeerConnection.prototype.addStream = function(stream) {
var pc = this;
if (edgeVersion >= 15025) {
stream.getTracks().forEach(function(track) {
pc.addTrack(track, stream);
});
} else {
// Clone is necessary for local demos mostly, attaching directly
// to two different senders does not work (build 10547).
// Fixed in 15025 (or earlier)
var clonedStream = stream.clone();
stream.getTracks().forEach(function(track, idx) {
var clonedTrack = clonedStream.getTracks()[idx];
track.addEventListener('enabled', function(event) {
clonedTrack.enabled = event.enabled;
});
});
clonedStream.getTracks().forEach(function(track) {
pc.addTrack(track, clonedStream);
});
}
};
RTCPeerConnection.prototype.removeTrack = function(sender) {
if (this._isClosed) {
throw makeError('InvalidStateError',
'Attempted to call removeTrack on a closed peerconnection.');
}
if (!(sender instanceof window.RTCRtpSender)) {
throw new TypeError('Argument 1 of RTCPeerConnection.removeTrack ' +
'does not implement interface RTCRtpSender.');
}
var transceiver = this.transceivers.find(function(t) {
return t.rtpSender === sender;
});
if (!transceiver) {
throw makeError('InvalidAccessError',
'Sender was not created by this connection.');
}
var stream = transceiver.stream;
transceiver.rtpSender.stop();
transceiver.rtpSender = null;
transceiver.track = null;
transceiver.stream = null;
// remove the stream from the set of local streams
var localStreams = this.transceivers.map(function(t) {
return t.stream;
});
if (localStreams.indexOf(stream) === -1 &&
this.localStreams.indexOf(stream) > -1) {
this.localStreams.splice(this.localStreams.indexOf(stream), 1);
}
this._maybeFireNegotiationNeeded();
};
RTCPeerConnection.prototype.removeStream = function(stream) {
var pc = this;
stream.getTracks().forEach(function(track) {
var sender = pc.getSenders().find(function(s) {
return s.track === track;
});
if (sender) {
pc.removeTrack(sender);
}
});
};
RTCPeerConnection.prototype.getSenders = function() {
return this.transceivers.filter(function(transceiver) {
return !!transceiver.rtpSender;
})
.map(function(transceiver) {
return transceiver.rtpSender;
});
};
RTCPeerConnection.prototype.getReceivers = function() {
return this.transceivers.filter(function(transceiver) {
return !!transceiver.rtpReceiver;
})
.map(function(transceiver) {
return transceiver.rtpReceiver;
});
};
RTCPeerConnection.prototype._createIceGatherer = function(sdpMLineIndex,
usingBundle) {
var pc = this;
if (usingBundle && sdpMLineIndex > 0) {
return this.transceivers[0].iceGatherer;
} else if (this._iceGatherers.length) {
return this._iceGatherers.shift();
}
var iceGatherer = new window.RTCIceGatherer({
iceServers: this._config.iceServers,
gatherPolicy: this._config.iceTransportPolicy
});
Object.defineProperty(iceGatherer, 'state',
{value: 'new', writable: true}
);
this.transceivers[sdpMLineIndex].bufferedCandidateEvents = [];
this.transceivers[sdpMLineIndex].bufferCandidates = function(event) {
var end = !event.candidate || Object.keys(event.candidate).length === 0;
// polyfill since RTCIceGatherer.state is not implemented in
// Edge 10547 yet.
iceGatherer.state = end ? 'completed' : 'gathering';
if (pc.transceivers[sdpMLineIndex].bufferedCandidateEvents !== null) {
pc.transceivers[sdpMLineIndex].bufferedCandidateEvents.push(event);
}
};
iceGatherer.addEventListener('localcandidate',
this.transceivers[sdpMLineIndex].bufferCandidates);
return iceGatherer;
};
// start gathering from an RTCIceGatherer.
RTCPeerConnection.prototype._gather = function(mid, sdpMLineIndex) {
var pc = this;
var iceGatherer = this.transceivers[sdpMLineIndex].iceGatherer;
if (iceGatherer.onlocalcandidate) {
return;
}
var bufferedCandidateEvents =
this.transceivers[sdpMLineIndex].bufferedCandidateEvents;
this.transceivers[sdpMLineIndex].bufferedCandidateEvents = null;
iceGatherer.removeEventListener('localcandidate',
this.transceivers[sdpMLineIndex].bufferCandidates);
iceGatherer.onlocalcandidate = function(evt) {
if (pc.usingBundle && sdpMLineIndex > 0) {
// if we know that we use bundle we can drop candidates with
// ѕdpMLineIndex > 0. If we don't do this then our state gets
// confused since we dispose the extra ice gatherer.
return;
}
var event = new Event('icecandidate');
event.candidate = {sdpMid: mid, sdpMLineIndex: sdpMLineIndex};
var cand = evt.candidate;
// Edge emits an empty object for RTCIceCandidateComplete‥
var end = !cand || Object.keys(cand).length === 0;
if (end) {
// polyfill since RTCIceGatherer.state is not implemented in
// Edge 10547 yet.
if (iceGatherer.state === 'new' || iceGatherer.state === 'gathering') {
iceGatherer.state = 'completed';
}
} else {
if (iceGatherer.state === 'new') {
iceGatherer.state = 'gathering';
}
// RTCIceCandidate doesn't have a component, needs to be added
cand.component = 1;
// also the usernameFragment. TODO: update SDP to take both variants.
cand.ufrag = iceGatherer.getLocalParameters().usernameFragment;
var serializedCandidate = SDPUtils.writeCandidate(cand);
event.candidate = Object.assign(event.candidate,
SDPUtils.parseCandidate(serializedCandidate));
event.candidate.candidate = serializedCandidate;
event.candidate.toJSON = function() {
return {
candidate: event.candidate.candidate,
sdpMid: event.candidate.sdpMid,
sdpMLineIndex: event.candidate.sdpMLineIndex,
usernameFragment: event.candidate.usernameFragment
};
};
}
// update local description.
var sections = SDPUtils.getMediaSections(pc._localDescription.sdp);
if (!end) {
sections[event.candidate.sdpMLineIndex] +=
'a=' + event.candidate.candidate + '\r\n';
} else {
sections[event.candidate.sdpMLineIndex] +=
'a=end-of-candidates\r\n';
}
pc._localDescription.sdp =
SDPUtils.getDescription(pc._localDescription.sdp) +
sections.join('');
var complete = pc.transceivers.every(function(transceiver) {
return transceiver.iceGatherer &&
transceiver.iceGatherer.state === 'completed';
});
if (pc.iceGatheringState !== 'gathering') {
pc.iceGatheringState = 'gathering';
pc._emitGatheringStateChange();
}
// Emit candidate. Also emit null candidate when all gatherers are
// complete.
if (!end) {
pc._dispatchEvent('icecandidate', event);
}
if (complete) {
pc._dispatchEvent('icecandidate', new Event('icecandidate'));
pc.iceGatheringState = 'complete';
pc._emitGatheringStateChange();
}
};
// emit already gathered candidates.
window.setTimeout(function() {
bufferedCandidateEvents.forEach(function(e) {
iceGatherer.onlocalcandidate(e);
});
}, 0);
};
// Create ICE transport and DTLS transport.
RTCPeerConnection.prototype._createIceAndDtlsTransports = function() {
var pc = this;
var iceTransport = new window.RTCIceTransport(null);
iceTransport.onicestatechange = function() {
pc._updateIceConnectionState();
pc._updateConnectionState();
};
var dtlsTransport = new window.RTCDtlsTransport(iceTransport);
dtlsTransport.ondtlsstatechange = function() {
pc._updateConnectionState();
};
dtlsTransport.onerror = function() {
// onerror does not set state to failed by itself.
Object.defineProperty(dtlsTransport, 'state',
{value: 'failed', writable: true});
pc._updateConnectionState();
};
return {
iceTransport: iceTransport,
dtlsTransport: dtlsTransport
};
};
// Destroy ICE gatherer, ICE transport and DTLS transport.
// Without triggering the callbacks.
RTCPeerConnection.prototype._disposeIceAndDtlsTransports = function(
sdpMLineIndex) {
var iceGatherer = this.transceivers[sdpMLineIndex].iceGatherer;
if (iceGatherer) {
delete iceGatherer.onlocalcandidate;
delete this.transceivers[sdpMLineIndex].iceGatherer;
}
var iceTransport = this.transceivers[sdpMLineIndex].iceTransport;
if (iceTransport) {
delete iceTransport.onicestatechange;
delete this.transceivers[sdpMLineIndex].iceTransport;
}
var dtlsTransport = this.transceivers[sdpMLineIndex].dtlsTransport;
if (dtlsTransport) {
delete dtlsTransport.ondtlsstatechange;
delete dtlsTransport.onerror;
delete this.transceivers[sdpMLineIndex].dtlsTransport;
}
};
// Start the RTP Sender and Receiver for a transceiver.
RTCPeerConnection.prototype._transceive = function(transceiver,
send, recv) {
var params = getCommonCapabilities(transceiver.localCapabilities,
transceiver.remoteCapabilities);
if (send && transceiver.rtpSender) {
params.encodings = transceiver.sendEncodingParameters;
params.rtcp = {
cname: SDPUtils.localCName,
compound: transceiver.rtcpParameters.compound
};
if (transceiver.recvEncodingParameters.length) {
params.rtcp.ssrc = transceiver.recvEncodingParameters[0].ssrc;
}
transceiver.rtpSender.send(params);
}
if (recv && transceiver.rtpReceiver && params.codecs.length > 0) {
// remove RTX field in Edge 14942
if (transceiver.kind === 'video'
&& transceiver.recvEncodingParameters
&& edgeVersion < 15019) {
transceiver.recvEncodingParameters.forEach(function(p) {
delete p.rtx;
});
}
if (transceiver.recvEncodingParameters.length) {
params.encodings = transceiver.recvEncodingParameters;
} else {
params.encodings = [{}];
}
params.rtcp = {
compound: transceiver.rtcpParameters.compound
};
if (transceiver.rtcpParameters.cname) {
params.rtcp.cname = transceiver.rtcpParameters.cname;
}
if (transceiver.sendEncodingParameters.length) {
params.rtcp.ssrc = transceiver.sendEncodingParameters[0].ssrc;
}
transceiver.rtpReceiver.receive(params);
}
};
RTCPeerConnection.prototype.setLocalDescription = function(description) {
var pc = this;
// Note: pranswer is not supported.
if (['offer', 'answer'].indexOf(description.type) === -1) {
return Promise.reject(makeError('TypeError',
'Unsupported type "' + description.type + '"'));
}
if (!isActionAllowedInSignalingState('setLocalDescription',
description.type, pc.signalingState) || pc._isClosed) {
return Promise.reject(makeError('InvalidStateError',
'Can not set local ' + description.type +
' in state ' + pc.signalingState));
}
var sections;
var sessionpart;
if (description.type === 'offer') {
// VERY limited support for SDP munging. Limited to:
// * changing the order of codecs
sections = SDPUtils.splitSections(description.sdp);
sessionpart = sections.shift();
sections.forEach(function(mediaSection, sdpMLineIndex) {
var caps = SDPUtils.parseRtpParameters(mediaSection);
pc.transceivers[sdpMLineIndex].localCapabilities = caps;
});
pc.transceivers.forEach(function(transceiver, sdpMLineIndex) {
pc._gather(transceiver.mid, sdpMLineIndex);
});
} else if (description.type === 'answer') {
sections = SDPUtils.splitSections(pc._remoteDescription.sdp);
sessionpart = sections.shift();
var isIceLite = SDPUtils.matchPrefix(sessionpart,
'a=ice-lite').length > 0;
sections.forEach(function(mediaSection, sdpMLineIndex) {
var transceiver = pc.transceivers[sdpMLineIndex];
var iceGatherer = transceiver.iceGatherer;
var iceTransport = transceiver.iceTransport;
var dtlsTransport = transceiver.dtlsTransport;
var localCapabilities = transceiver.localCapabilities;
var remoteCapabilities = transceiver.remoteCapabilities;
// treat bundle-only as not-rejected.
var rejected = SDPUtils.isRejected(mediaSection) &&
SDPUtils.matchPrefix(mediaSection, 'a=bundle-only').length === 0;
if (!rejected && !transceiver.rejected) {
var remoteIceParameters = SDPUtils.getIceParameters(
mediaSection, sessionpart);
var remoteDtlsParameters = SDPUtils.getDtlsParameters(
mediaSection, sessionpart);
if (isIceLite) {
remoteDtlsParameters.role = 'server';
}
if (!pc.usingBundle || sdpMLineIndex === 0) {
pc._gather(transceiver.mid, sdpMLineIndex);
if (iceTransport.state === 'new') {
iceTransport.start(iceGatherer, remoteIceParameters,
isIceLite ? 'controlling' : 'controlled');
}
if (dtlsTransport.state === 'new') {
dtlsTransport.start(remoteDtlsParameters);
}
}
// Calculate intersection of capabilities.
var params = getCommonCapabilities(localCapabilities,
remoteCapabilities);
// Start the RTCRtpSender. The RTCRtpReceiver for this
// transceiver has already been started in setRemoteDescription.
pc._transceive(transceiver,
params.codecs.length > 0,
false);
}
});
}
pc._localDescription = {
type: description.type,
sdp: description.sdp
};
if (description.type === 'offer') {
pc._updateSignalingState('have-local-offer');
} else {
pc._updateSignalingState('stable');
}
return Promise.resolve();
};
RTCPeerConnection.prototype.setRemoteDescription = function(description) {
var pc = this;
// Note: pranswer is not supported.
if (['offer', 'answer'].indexOf(description.type) === -1) {
return Promise.reject(makeError('TypeError',
'Unsupported type "' + description.type + '"'));
}
if (!isActionAllowedInSignalingState('setRemoteDescription',
description.type, pc.signalingState) || pc._isClosed) {
return Promise.reject(makeError('InvalidStateError',
'Can not set remote ' + description.type +
' in state ' + pc.signalingState));
}
var streams = {};
pc.remoteStreams.forEach(function(stream) {
streams[stream.id] = stream;
});
var receiverList = [];
var sections = SDPUtils.splitSections(description.sdp);
var sessionpart = sections.shift();
var isIceLite = SDPUtils.matchPrefix(sessionpart,
'a=ice-lite').length > 0;
var usingBundle = SDPUtils.matchPrefix(sessionpart,
'a=group:BUNDLE ').length > 0;
pc.usingBundle = usingBundle;
var iceOptions = SDPUtils.matchPrefix(sessionpart,
'a=ice-options:')[0];
if (iceOptions) {
pc.canTrickleIceCandidates = iceOptions.substr(14).split(' ')
.indexOf('trickle') >= 0;
} else {
pc.canTrickleIceCandidates = false;
}
sections.forEach(function(mediaSection, sdpMLineIndex) {
var lines = SDPUtils.splitLines(mediaSection);
var kind = SDPUtils.getKind(mediaSection);
// treat bundle-only as not-rejected.
var rejected = SDPUtils.isRejected(mediaSection) &&
SDPUtils.matchPrefix(mediaSection, 'a=bundle-only').length === 0;
var protocol = lines[0].substr(2).split(' ')[2];
var direction = SDPUtils.getDirection(mediaSection, sessionpart);
var remoteMsid = SDPUtils.parseMsid(mediaSection);
var mid = SDPUtils.getMid(mediaSection) || SDPUtils.generateIdentifier();
// Reject datachannels which are not implemented yet.
if (rejected || (kind === 'application' && (protocol === 'DTLS/SCTP' ||
protocol === 'UDP/DTLS/SCTP'))) {
// TODO: this is dangerous in the case where a non-rejected m-line
// becomes rejected.
pc.transceivers[sdpMLineIndex] = {
mid: mid,
kind: kind,
protocol: protocol,
rejected: true
};
return;
}
if (!rejected && pc.transceivers[sdpMLineIndex] &&
pc.transceivers[sdpMLineIndex].rejected) {
// recycle a rejected transceiver.
pc.transceivers[sdpMLineIndex] = pc._createTransceiver(kind, true);
}
var transceiver;
var iceGatherer;
var iceTransport;
var dtlsTransport;
var rtpReceiver;
var sendEncodingParameters;
var recvEncodingParameters;
var localCapabilities;
var track;
// FIXME: ensure the mediaSection has rtcp-mux set.
var remoteCapabilities = SDPUtils.parseRtpParameters(mediaSection);
var remoteIceParameters;
var remoteDtlsParameters;
if (!rejected) {
remoteIceParameters = SDPUtils.getIceParameters(mediaSection,
sessionpart);
remoteDtlsParameters = SDPUtils.getDtlsParameters(mediaSection,
sessionpart);
remoteDtlsParameters.role = 'client';
}
recvEncodingParameters =
SDPUtils.parseRtpEncodingParameters(mediaSection);
var rtcpParameters = SDPUtils.parseRtcpParameters(mediaSection);
var isComplete = SDPUtils.matchPrefix(mediaSection,
'a=end-of-candidates', sessionpart).length > 0;
var cands = SDPUtils.matchPrefix(mediaSection, 'a=candidate:')
.map(function(cand) {
return SDPUtils.parseCandidate(cand);
})
.filter(function(cand) {
return cand.component === 1;
});
// Check if we can use BUNDLE and dispose transports.
if ((description.type === 'offer' || description.type === 'answer') &&
!rejected && usingBundle && sdpMLineIndex > 0 &&
pc.transceivers[sdpMLineIndex]) {
pc._disposeIceAndDtlsTransports(sdpMLineIndex);
pc.transceivers[sdpMLineIndex].iceGatherer =
pc.transceivers[0].iceGatherer;
pc.transceivers[sdpMLineIndex].iceTransport =
pc.transceivers[0].iceTransport;
pc.transceivers[sdpMLineIndex].dtlsTransport =
pc.transceivers[0].dtlsTransport;
if (pc.transceivers[sdpMLineIndex].rtpSender) {
pc.transceivers[sdpMLineIndex].rtpSender.setTransport(
pc.transceivers[0].dtlsTransport);
}
if (pc.transceivers[sdpMLineIndex].rtpReceiver) {
pc.transceivers[sdpMLineIndex].rtpReceiver.setTransport(
pc.transceivers[0].dtlsTransport);
}
}
if (description.type === 'offer' && !rejected) {
transceiver = pc.transceivers[sdpMLineIndex] ||
pc._createTransceiver(kind);
transceiver.mid = mid;
if (!transceiver.iceGatherer) {
transceiver.iceGatherer = pc._createIceGatherer(sdpMLineIndex,
usingBundle);
}
if (cands.length && transceiver.iceTransport.state === 'new') {
if (isComplete && (!usingBundle || sdpMLineIndex === 0)) {
transceiver.iceTransport.setRemoteCandidates(cands);
} else {
cands.forEach(function(candidate) {
maybeAddCandidate(transceiver.iceTransport, candidate);
});
}
}
localCapabilities = window.RTCRtpReceiver.getCapabilities(kind);
// filter RTX until additional stuff needed for RTX is implemented
// in adapter.js
if (edgeVersion < 15019) {
localCapabilities.codecs = localCapabilities.codecs.filter(
function(codec) {
return codec.name !== 'rtx';
});
}
sendEncodingParameters = transceiver.sendEncodingParameters || [{
ssrc: (2 * sdpMLineIndex + 2) * 1001
}];
// TODO: rewrite to use http://w3c.github.io/webrtc-pc/#set-associated-remote-streams
var isNewTrack = false;
if (direction === 'sendrecv' || direction === 'sendonly') {
isNewTrack = !transceiver.rtpReceiver;
rtpReceiver = transceiver.rtpReceiver ||
new window.RTCRtpReceiver(transceiver.dtlsTransport, kind);
if (isNewTrack) {
var stream;
track = rtpReceiver.track;
// FIXME: does not work with Plan B.
if (remoteMsid && remoteMsid.stream === '-') {
// no-op. a stream id of '-' means: no associated stream.
} else if (remoteMsid) {
if (!streams[remoteMsid.stream]) {
streams[remoteMsid.stream] = new window.MediaStream();
Object.defineProperty(streams[remoteMsid.stream], 'id', {
get: function() {
return remoteMsid.stream;
}
});
}
Object.defineProperty(track, 'id', {
get: function() {
return remoteMsid.track;
}
});
stream = streams[remoteMsid.stream];
} else {
if (!streams.default) {
streams.default = new window.MediaStream();
}
stream = streams.default;
}
if (stream) {
addTrackToStreamAndFireEvent(track, stream);
transceiver.associatedRemoteMediaStreams.push(stream);
}
receiverList.push([track, rtpReceiver, stream]);
}
} else if (transceiver.rtpReceiver && transceiver.rtpReceiver.track) {
transceiver.associatedRemoteMediaStreams.forEach(function(s) {
var nativeTrack = s.getTracks().find(function(t) {
return t.id === transceiver.rtpReceiver.track.id;
});
if (nativeTrack) {
removeTrackFromStreamAndFireEvent(nativeTrack, s);
}
});
transceiver.associatedRemoteMediaStreams = [];
}
transceiver.localCapabilities = localCapabilities;
transceiver.remoteCapabilities = remoteCapabilities;
transceiver.rtpReceiver = rtpReceiver;
transceiver.rtcpParameters = rtcpParameters;
transceiver.sendEncodingParameters = sendEncodingParameters;
transceiver.recvEncodingParameters = recvEncodingParameters;
// Start the RTCRtpReceiver now. The RTPSender is started in
// setLocalDescription.
pc._transceive(pc.transceivers[sdpMLineIndex],
false,
isNewTrack);
} else if (description.type === 'answer' && !rejected) {
transceiver = pc.transceivers[sdpMLineIndex];
iceGatherer = transceiver.iceGatherer;
iceTransport = transceiver.iceTransport;
dtlsTransport = transceiver.dtlsTransport;
rtpReceiver = transceiver.rtpReceiver;
sendEncodingParameters = transceiver.sendEncodingParameters;
localCapabilities = transceiver.localCapabilities;
pc.transceivers[sdpMLineIndex].recvEncodingParameters =
recvEncodingParameters;
pc.transceivers[sdpMLineIndex].remoteCapabilities =
remoteCapabilities;
pc.transceivers[sdpMLineIndex].rtcpParameters = rtcpParameters;
if (cands.length && iceTransport.state === 'new') {
if ((isIceLite || isComplete) &&
(!usingBundle || sdpMLineIndex === 0)) {
iceTransport.setRemoteCandidates(cands);
} else {
cands.forEach(function(candidate) {
maybeAddCandidate(transceiver.iceTransport, candidate);
});
}
}
if (!usingBundle || sdpMLineIndex === 0) {
if (iceTransport.state === 'new') {
iceTransport.start(iceGatherer, remoteIceParameters,
'controlling');
}
if (dtlsTransport.state === 'new') {
dtlsTransport.start(remoteDtlsParameters);
}
}
// If the offer contained RTX but the answer did not,
// remove RTX from sendEncodingParameters.
var commonCapabilities = getCommonCapabilities(
transceiver.localCapabilities,
transceiver.remoteCapabilities);
var hasRtx = commonCapabilities.codecs.filter(function(c) {
return c.name.toLowerCase() === 'rtx';
}).length;
if (!hasRtx && transceiver.sendEncodingParameters[0].rtx) {
delete transceiver.sendEncodingParameters[0].rtx;
}
pc._transceive(transceiver,
direction === 'sendrecv' || direction === 'recvonly',
direction === 'sendrecv' || direction === 'sendonly');
// TODO: rewrite to use http://w3c.github.io/webrtc-pc/#set-associated-remote-streams
if (rtpReceiver &&
(direction === 'sendrecv' || direction === 'sendonly')) {
track = rtpReceiver.track;
if (remoteMsid) {
if (!streams[remoteMsid.stream]) {
streams[remoteMsid.stream] = new window.MediaStream();
}
addTrackToStreamAndFireEvent(track, streams[remoteMsid.stream]);
receiverList.push([track, rtpReceiver, streams[remoteMsid.stream]]);
} else {
if (!streams.default) {
streams.default = new window.MediaStream();
}
addTrackToStreamAndFireEvent(track, streams.default);
receiverList.push([track, rtpReceiver, streams.default]);
}
} else {
// FIXME: actually the receiver should be created later.
delete transceiver.rtpReceiver;
}
}
});
if (pc._dtlsRole === undefined) {
pc._dtlsRole = description.type === 'offer' ? 'active' : 'passive';
}
pc._remoteDescription = {
type: description.type,
sdp: description.sdp
};
if (description.type === 'offer') {
pc._updateSignalingState('have-remote-offer');
} else {
pc._updateSignalingState('stable');
}
Object.keys(streams).forEach(function(sid) {
var stream = streams[sid];
if (stream.getTracks().length) {
if (pc.remoteStreams.indexOf(stream) === -1) {
pc.remoteStreams.push(stream);
var event = new Event('addstream');
event.stream = stream;
window.setTimeout(function() {
pc._dispatchEvent('addstream', event);
});
}
receiverList.forEach(function(item) {
var track = item[0];
var receiver = item[1];
if (stream.id !== item[2].id) {
return;
}
fireAddTrack(pc, track, receiver, [stream]);
});
}
});
receiverList.forEach(function(item) {
if (item[2]) {
return;
}
fireAddTrack(pc, item[0], item[1], []);
});
// check whether addIceCandidate({}) was called within four seconds after
// setRemoteDescription.
window.setTimeout(function() {
if (!(pc && pc.transceivers)) {
return;
}
pc.transceivers.forEach(function(transceiver) {
if (transceiver.iceTransport &&
transceiver.iceTransport.state === 'new' &&
transceiver.iceTransport.getRemoteCandidates().length > 0) {
console.warn('Timeout for addRemoteCandidate. Consider sending ' +
'an end-of-candidates notification');
transceiver.iceTransport.addRemoteCandidate({});
}
});
}, 4000);
return Promise.resolve();
};
RTCPeerConnection.prototype.close = function() {
this.transceivers.forEach(function(transceiver) {
/* not yet
if (transceiver.iceGatherer) {
transceiver.iceGatherer.close();
}
*/
if (transceiver.iceTransport) {
transceiver.iceTransport.stop();
}
if (transceiver.dtlsTransport) {
transceiver.dtlsTransport.stop();
}
if (transceiver.rtpSender) {
transceiver.rtpSender.stop();
}
if (transceiver.rtpReceiver) {
transceiver.rtpReceiver.stop();
}
});
// FIXME: clean up tracks, local streams, remote streams, etc
this._isClosed = true;
this._updateSignalingState('closed');
};
// Update the signaling state.
RTCPeerConnection.prototype._updateSignalingState = function(newState) {
this.signalingState = newState;
var event = new Event('signalingstatechange');
this._dispatchEvent('signalingstatechange', event);
};
// Determine whether to fire the negotiationneeded event.
RTCPeerConnection.prototype._maybeFireNegotiationNeeded = function() {
var pc = this;
if (this.signalingState !== 'stable' || this.needNegotiation === true) {
return;
}
this.needNegotiation = true;
window.setTimeout(function() {
if (pc.needNegotiation) {
pc.needNegotiation = false;
var event = new Event('negotiationneeded');
pc._dispatchEvent('negotiationneeded', event);
}
}, 0);
};
// Update the ice connection state.
RTCPeerConnection.prototype._updateIceConnectionState = function() {
var newState;
var states = {
'new': 0,
closed: 0,
checking: 0,
connected: 0,
completed: 0,
disconnected: 0,
failed: 0
};
this.transceivers.forEach(function(transceiver) {
states[transceiver.iceTransport.state]++;
});
newState = 'new';
if (states.failed > 0) {
newState = 'failed';
} else if (states.checking > 0) {
newState = 'checking';
} else if (states.disconnected > 0) {
newState = 'disconnected';
} else if (states.new > 0) {
newState = 'new';
} else if (states.connected > 0) {
newState = 'connected';
} else if (states.completed > 0) {
newState = 'completed';
}
if (newState !== this.iceConnectionState) {
this.iceConnectionState = newState;
var event = new Event('iceconnectionstatechange');
this._dispatchEvent('iceconnectionstatechange', event);
}
};
// Update the connection state.
RTCPeerConnection.prototype._updateConnectionState = function() {
var newState;
var states = {
'new': 0,
closed: 0,
connecting: 0,
connected: 0,
completed: 0,
disconnected: 0,
failed: 0
};
this.transceivers.forEach(function(transceiver) {
states[transceiver.iceTransport.state]++;
states[transceiver.dtlsTransport.state]++;
});
// ICETransport.completed and connected are the same for this purpose.
states.connected += states.completed;
newState = 'new';
if (states.failed > 0) {
newState = 'failed';
} else if (states.connecting > 0) {
newState = 'connecting';
} else if (states.disconnected > 0) {
newState = 'disconnected';
} else if (states.new > 0) {
newState = 'new';
} else if (states.connected > 0) {
newState = 'connected';
}
if (newState !== this.connectionState) {
this.connectionState = newState;
var event = new Event('connectionstatechange');
this._dispatchEvent('connectionstatechange', event);
}
};
RTCPeerConnection.prototype.createOffer = function() {
var pc = this;
if (pc._isClosed) {
return Promise.reject(makeError('InvalidStateError',
'Can not call createOffer after close'));
}
var numAudioTracks = pc.transceivers.filter(function(t) {
return t.kind === 'audio';
}).length;
var numVideoTracks = pc.transceivers.filter(function(t) {
return t.kind === 'video';
}).length;
// Determine number of audio and video tracks we need to send/recv.
var offerOptions = arguments[0];
if (offerOptions) {
// Reject Chrome legacy constraints.
if (offerOptions.mandatory || offerOptions.optional) {
throw new TypeError(
'Legacy mandatory/optional constraints not supported.');
}
if (offerOptions.offerToReceiveAudio !== undefined) {
if (offerOptions.offerToReceiveAudio === true) {
numAudioTracks = 1;
} else if (offerOptions.offerToReceiveAudio === false) {
numAudioTracks = 0;
} else {
numAudioTracks = offerOptions.offerToReceiveAudio;
}
}
if (offerOptions.offerToReceiveVideo !== undefined) {
if (offerOptions.offerToReceiveVideo === true) {
numVideoTracks = 1;
} else if (offerOptions.offerToReceiveVideo === false) {
numVideoTracks = 0;
} else {
numVideoTracks = offerOptions.offerToReceiveVideo;
}
}
}
pc.transceivers.forEach(function(transceiver) {
if (transceiver.kind === 'audio') {
numAudioTracks--;
if (numAudioTracks < 0) {
transceiver.wantReceive = false;
}
} else if (transceiver.kind === 'video') {
numVideoTracks--;
if (numVideoTracks < 0) {
transceiver.wantReceive = false;
}
}
});
// Create M-lines for recvonly streams.
while (numAudioTracks > 0 || numVideoTracks > 0) {
if (numAudioTracks > 0) {
pc._createTransceiver('audio');
numAudioTracks--;
}
if (numVideoTracks > 0) {
pc._createTransceiver('video');
numVideoTracks--;
}
}
var sdp = SDPUtils.writeSessionBoilerplate(pc._sdpSessionId,
pc._sdpSessionVersion++);
pc.transceivers.forEach(function(transceiver, sdpMLineIndex) {
// For each track, create an ice gatherer, ice transport,
// dtls transport, potentially rtpsender and rtpreceiver.
var track = transceiver.track;
var kind = transceiver.kind;
var mid = transceiver.mid || SDPUtils.generateIdentifier();
transceiver.mid = mid;
if (!transceiver.iceGatherer) {
transceiver.iceGatherer = pc._createIceGatherer(sdpMLineIndex,
pc.usingBundle);
}
var localCapabilities = window.RTCRtpSender.getCapabilities(kind);
// filter RTX until additional stuff needed for RTX is implemented
// in adapter.js
if (edgeVersion < 15019) {
localCapabilities.codecs = localCapabilities.codecs.filter(
function(codec) {
return codec.name !== 'rtx';
});
}
localCapabilities.codecs.forEach(function(codec) {
// work around https://bugs.chromium.org/p/webrtc/issues/detail?id=6552
// by adding level-asymmetry-allowed=1
if (codec.name === 'H264' &&
codec.parameters['level-asymmetry-allowed'] === undefined) {
codec.parameters['level-asymmetry-allowed'] = '1';
}
// for subsequent offers, we might have to re-use the payload
// type of the last offer.
if (transceiver.remoteCapabilities &&
transceiver.remoteCapabilities.codecs) {
transceiver.remoteCapabilities.codecs.forEach(function(remoteCodec) {
if (codec.name.toLowerCase() === remoteCodec.name.toLowerCase() &&
codec.clockRate === remoteCodec.clockRate) {
codec.preferredPayloadType = remoteCodec.payloadType;
}
});
}
});
localCapabilities.headerExtensions.forEach(function(hdrExt) {
var remoteExtensions = transceiver.remoteCapabilities &&
transceiver.remoteCapabilities.headerExtensions || [];
remoteExtensions.forEach(function(rHdrExt) {
if (hdrExt.uri === rHdrExt.uri) {
hdrExt.id = rHdrExt.id;
}
});
});
// generate an ssrc now, to be used later in rtpSender.send
var sendEncodingParameters = transceiver.sendEncodingParameters || [{
ssrc: (2 * sdpMLineIndex + 1) * 1001
}];
if (track) {
// add RTX
if (edgeVersion >= 15019 && kind === 'video' &&
!sendEncodingParameters[0].rtx) {
sendEncodingParameters[0].rtx = {
ssrc: sendEncodingParameters[0].ssrc + 1
};
}
}
if (transceiver.wantReceive) {
transceiver.rtpReceiver = new window.RTCRtpReceiver(
transceiver.dtlsTransport, kind);
}
transceiver.localCapabilities = localCapabilities;
transceiver.sendEncodingParameters = sendEncodingParameters;
});
// always offer BUNDLE and dispose on return if not supported.
if (pc._config.bundlePolicy !== 'max-compat') {
sdp += 'a=group:BUNDLE ' + pc.transceivers.map(function(t) {
return t.mid;
}).join(' ') + '\r\n';
}
sdp += 'a=ice-options:trickle\r\n';
pc.transceivers.forEach(function(transceiver, sdpMLineIndex) {
sdp += writeMediaSection(transceiver, transceiver.localCapabilities,
'offer', transceiver.stream, pc._dtlsRole);
sdp += 'a=rtcp-rsize\r\n';
if (transceiver.iceGatherer && pc.iceGatheringState !== 'new' &&
(sdpMLineIndex === 0 || !pc.usingBundle)) {
transceiver.iceGatherer.getLocalCandidates().forEach(function(cand) {
cand.component = 1;
sdp += 'a=' + SDPUtils.writeCandidate(cand) + '\r\n';
});
if (transceiver.iceGatherer.state === 'completed') {
sdp += 'a=end-of-candidates\r\n';
}
}
});
var desc = new window.RTCSessionDescription({
type: 'offer',
sdp: sdp
});
return Promise.resolve(desc);
};
RTCPeerConnection.prototype.createAnswer = function() {
var pc = this;
if (pc._isClosed) {
return Promise.reject(makeError('InvalidStateError',
'Can not call createAnswer after close'));
}
if (!(pc.signalingState === 'have-remote-offer' ||
pc.signalingState === 'have-local-pranswer')) {
return Promise.reject(makeError('InvalidStateError',
'Can not call createAnswer in signalingState ' + pc.signalingState));
}
var sdp = SDPUtils.writeSessionBoilerplate(pc._sdpSessionId,
pc._sdpSessionVersion++);
if (pc.usingBundle) {
sdp += 'a=group:BUNDLE ' + pc.transceivers.map(function(t) {
return t.mid;
}).join(' ') + '\r\n';
}
sdp += 'a=ice-options:trickle\r\n';
var mediaSectionsInOffer = SDPUtils.getMediaSections(
pc._remoteDescription.sdp).length;
pc.transceivers.forEach(function(transceiver, sdpMLineIndex) {
if (sdpMLineIndex + 1 > mediaSectionsInOffer) {
return;
}
if (transceiver.rejected) {
if (transceiver.kind === 'application') {
if (transceiver.protocol === 'DTLS/SCTP') { // legacy fmt
sdp += 'm=application 0 DTLS/SCTP 5000\r\n';
} else {
sdp += 'm=application 0 ' + transceiver.protocol +
' webrtc-datachannel\r\n';
}
} else if (transceiver.kind === 'audio') {
sdp += 'm=audio 0 UDP/TLS/RTP/SAVPF 0\r\n' +
'a=rtpmap:0 PCMU/8000\r\n';
} else if (transceiver.kind === 'video') {
sdp += 'm=video 0 UDP/TLS/RTP/SAVPF 120\r\n' +
'a=rtpmap:120 VP8/90000\r\n';
}
sdp += 'c=IN IP4 0.0.0.0\r\n' +
'a=inactive\r\n' +
'a=mid:' + transceiver.mid + '\r\n';
return;
}
// FIXME: look at direction.
if (transceiver.stream) {
var localTrack;
if (transceiver.kind === 'audio') {
localTrack = transceiver.stream.getAudioTracks()[0];
} else if (transceiver.kind === 'video') {
localTrack = transceiver.stream.getVideoTracks()[0];
}
if (localTrack) {
// add RTX
if (edgeVersion >= 15019 && transceiver.kind === 'video' &&
!transceiver.sendEncodingParameters[0].rtx) {
transceiver.sendEncodingParameters[0].rtx = {
ssrc: transceiver.sendEncodingParameters[0].ssrc + 1
};
}
}
}
// Calculate intersection of capabilities.
var commonCapabilities = getCommonCapabilities(
transceiver.localCapabilities,
transceiver.remoteCapabilities);
var hasRtx = commonCapabilities.codecs.filter(function(c) {
return c.name.toLowerCase() === 'rtx';
}).length;
if (!hasRtx && transceiver.sendEncodingParameters[0].rtx) {
delete transceiver.sendEncodingParameters[0].rtx;
}
sdp += writeMediaSection(transceiver, commonCapabilities,
'answer', transceiver.stream, pc._dtlsRole);
if (transceiver.rtcpParameters &&
transceiver.rtcpParameters.reducedSize) {
sdp += 'a=rtcp-rsize\r\n';
}
});
var desc = new window.RTCSessionDescription({
type: 'answer',
sdp: sdp
});
return Promise.resolve(desc);
};
RTCPeerConnection.prototype.addIceCandidate = function(candidate) {
var pc = this;
var sections;
if (candidate && !(candidate.sdpMLineIndex !== undefined ||
candidate.sdpMid)) {
return Promise.reject(new TypeError('sdpMLineIndex or sdpMid required'));
}
// TODO: needs to go into ops queue.
return new Promise(function(resolve, reject) {
if (!pc._remoteDescription) {
return reject(makeError('InvalidStateError',
'Can not add ICE candidate without a remote description'));
} else if (!candidate || candidate.candidate === '') {
for (var j = 0; j < pc.transceivers.length; j++) {
if (pc.transceivers[j].rejected) {
continue;
}
pc.transceivers[j].iceTransport.addRemoteCandidate({});
sections = SDPUtils.getMediaSections(pc._remoteDescription.sdp);
sections[j] += 'a=end-of-candidates\r\n';
pc._remoteDescription.sdp =
SDPUtils.getDescription(pc._remoteDescription.sdp) +
sections.join('');
if (pc.usingBundle) {
break;
}
}
} else {
var sdpMLineIndex = candidate.sdpMLineIndex;
if (candidate.sdpMid) {
for (var i = 0; i < pc.transceivers.length; i++) {
if (pc.transceivers[i].mid === candidate.sdpMid) {
sdpMLineIndex = i;
break;
}
}
}
var transceiver = pc.transceivers[sdpMLineIndex];
if (transceiver) {
if (transceiver.rejected) {
return resolve();
}
var cand = Object.keys(candidate.candidate).length > 0 ?
SDPUtils.parseCandidate(candidate.candidate) : {};
// Ignore Chrome's invalid candidates since Edge does not like them.
if (cand.protocol === 'tcp' && (cand.port === 0 || cand.port === 9)) {
return resolve();
}
// Ignore RTCP candidates, we assume RTCP-MUX.
if (cand.component && cand.component !== 1) {
return resolve();
}
// when using bundle, avoid adding candidates to the wrong
// ice transport. And avoid adding candidates added in the SDP.
if (sdpMLineIndex === 0 || (sdpMLineIndex > 0 &&
transceiver.iceTransport !== pc.transceivers[0].iceTransport)) {
if (!maybeAddCandidate(transceiver.iceTransport, cand)) {
return reject(makeError('OperationError',
'Can not add ICE candidate'));
}
}
// update the remoteDescription.
var candidateString = candidate.candidate.trim();
if (candidateString.indexOf('a=') === 0) {
candidateString = candidateString.substr(2);
}
sections = SDPUtils.getMediaSections(pc._remoteDescription.sdp);
sections[sdpMLineIndex] += 'a=' +
(cand.type ? candidateString : 'end-of-candidates')
+ '\r\n';
pc._remoteDescription.sdp =
SDPUtils.getDescription(pc._remoteDescription.sdp) +
sections.join('');
} else {
return reject(makeError('OperationError',
'Can not add ICE candidate'));
}
}
resolve();
});
};
RTCPeerConnection.prototype.getStats = function(selector) {
if (selector && selector instanceof window.MediaStreamTrack) {
var senderOrReceiver = null;
this.transceivers.forEach(function(transceiver) {
if (transceiver.rtpSender &&
transceiver.rtpSender.track === selector) {
senderOrReceiver = transceiver.rtpSender;
} else if (transceiver.rtpReceiver &&
transceiver.rtpReceiver.track === selector) {
senderOrReceiver = transceiver.rtpReceiver;
}
});
if (!senderOrReceiver) {
throw makeError('InvalidAccessError', 'Invalid selector.');
}
return senderOrReceiver.getStats();
}
var promises = [];
this.transceivers.forEach(function(transceiver) {
['rtpSender', 'rtpReceiver', 'iceGatherer', 'iceTransport',
'dtlsTransport'].forEach(function(method) {
if (transceiver[method]) {
promises.push(transceiver[method].getStats());
}
});
});
return Promise.all(promises).then(function(allStats) {
var results = new Map();
allStats.forEach(function(stats) {
stats.forEach(function(stat) {
results.set(stat.id, stat);
});
});
return results;
});
};
// fix low-level stat names and return Map instead of object.
var ortcObjects = ['RTCRtpSender', 'RTCRtpReceiver', 'RTCIceGatherer',
'RTCIceTransport', 'RTCDtlsTransport'];
ortcObjects.forEach(function(ortcObjectName) {
var obj = window[ortcObjectName];
if (obj && obj.prototype && obj.prototype.getStats) {
var nativeGetstats = obj.prototype.getStats;
obj.prototype.getStats = function() {
return nativeGetstats.apply(this)
.then(function(nativeStats) {
var mapStats = new Map();
Object.keys(nativeStats).forEach(function(id) {
nativeStats[id].type = fixStatsType(nativeStats[id]);
mapStats.set(id, nativeStats[id]);
});
return mapStats;
});
};
}
});
// legacy callback shims. Should be moved to adapter.js some days.
var methods = ['createOffer', 'createAnswer'];
methods.forEach(function(method) {
var nativeMethod = RTCPeerConnection.prototype[method];
RTCPeerConnection.prototype[method] = function() {
var args = arguments;
if (typeof args[0] === 'function' ||
typeof args[1] === 'function') { // legacy
return nativeMethod.apply(this, [arguments[2]])
.then(function(description) {
if (typeof args[0] === 'function') {
args[0].apply(null, [description]);
}
}, function(error) {
if (typeof args[1] === 'function') {
args[1].apply(null, [error]);
}
});
}
return nativeMethod.apply(this, arguments);
};
});
methods = ['setLocalDescription', 'setRemoteDescription', 'addIceCandidate'];
methods.forEach(function(method) {
var nativeMethod = RTCPeerConnection.prototype[method];
RTCPeerConnection.prototype[method] = function() {
var args = arguments;
if (typeof args[1] === 'function' ||
typeof args[2] === 'function') { // legacy
return nativeMethod.apply(this, arguments)
.then(function() {
if (typeof args[1] === 'function') {
args[1].apply(null);
}
}, function(error) {
if (typeof args[2] === 'function') {
args[2].apply(null, [error]);
}
});
}
return nativeMethod.apply(this, arguments);
};
});
// getStats is special. It doesn't have a spec legacy method yet we support
// getStats(something, cb) without error callbacks.
['getStats'].forEach(function(method) {
var nativeMethod = RTCPeerConnection.prototype[method];
RTCPeerConnection.prototype[method] = function() {
var args = arguments;
if (typeof args[1] === 'function') {
return nativeMethod.apply(this, arguments)
.then(function() {
if (typeof args[1] === 'function') {
args[1].apply(null);
}
});
}
return nativeMethod.apply(this, arguments);
};
});
return RTCPeerConnection;
};
},{"sdp":2}],2:[function(require,module,exports){
/* eslint-env node */
'use strict';
// SDP helpers.
var SDPUtils = {};
// Generate an alphanumeric identifier for cname or mids.
// TODO: use UUIDs instead? https://gist.github.com/jed/982883
SDPUtils.generateIdentifier = function() {
return Math.random().toString(36).substr(2, 10);
};
// The RTCP CNAME used by all peerconnections from the same JS.
SDPUtils.localCName = SDPUtils.generateIdentifier();
// Splits SDP into lines, dealing with both CRLF and LF.
SDPUtils.splitLines = function(blob) {
return blob.trim().split('\n').map(function(line) {
return line.trim();
});
};
// Splits SDP into sessionpart and mediasections. Ensures CRLF.
SDPUtils.splitSections = function(blob) {
var parts = blob.split('\nm=');
return parts.map(function(part, index) {
return (index > 0 ? 'm=' + part : part).trim() + '\r\n';
});
};
// returns the session description.
SDPUtils.getDescription = function(blob) {
var sections = SDPUtils.splitSections(blob);
return sections && sections[0];
};
// returns the individual media sections.
SDPUtils.getMediaSections = function(blob) {
var sections = SDPUtils.splitSections(blob);
sections.shift();
return sections;
};
// Returns lines that start with a certain prefix.
SDPUtils.matchPrefix = function(blob, prefix) {
return SDPUtils.splitLines(blob).filter(function(line) {
return line.indexOf(prefix) === 0;
});
};
// Parses an ICE candidate line. Sample input:
// candidate:702786350 2 udp 41819902 8.8.8.8 60769 typ relay raddr 8.8.8.8
// rport 55996"
SDPUtils.parseCandidate = function(line) {
var parts;
// Parse both variants.
if (line.indexOf('a=candidate:') === 0) {
parts = line.substring(12).split(' ');
} else {
parts = line.substring(10).split(' ');
}
var candidate = {
foundation: parts[0],
component: parseInt(parts[1], 10),
protocol: parts[2].toLowerCase(),
priority: parseInt(parts[3], 10),
ip: parts[4],
address: parts[4], // address is an alias for ip.
port: parseInt(parts[5], 10),
// skip parts[6] == 'typ'
type: parts[7]
};
for (var i = 8; i < parts.length; i += 2) {
switch (parts[i]) {
case 'raddr':
candidate.relatedAddress = parts[i + 1];
break;
case 'rport':
candidate.relatedPort = parseInt(parts[i + 1], 10);
break;
case 'tcptype':
candidate.tcpType = parts[i + 1];
break;
case 'ufrag':
candidate.ufrag = parts[i + 1]; // for backward compability.
candidate.usernameFragment = parts[i + 1];
break;
default: // extension handling, in particular ufrag
candidate[parts[i]] = parts[i + 1];
break;
}
}
return candidate;
};
// Translates a candidate object into SDP candidate attribute.
SDPUtils.writeCandidate = function(candidate) {
var sdp = [];
sdp.push(candidate.foundation);
sdp.push(candidate.component);
sdp.push(candidate.protocol.toUpperCase());
sdp.push(candidate.priority);
sdp.push(candidate.address || candidate.ip);
sdp.push(candidate.port);
var type = candidate.type;
sdp.push('typ');
sdp.push(type);
if (type !== 'host' && candidate.relatedAddress &&
candidate.relatedPort) {
sdp.push('raddr');
sdp.push(candidate.relatedAddress);
sdp.push('rport');
sdp.push(candidate.relatedPort);
}
if (candidate.tcpType && candidate.protocol.toLowerCase() === 'tcp') {
sdp.push('tcptype');
sdp.push(candidate.tcpType);
}
if (candidate.usernameFragment || candidate.ufrag) {
sdp.push('ufrag');
sdp.push(candidate.usernameFragment || candidate.ufrag);
}
return 'candidate:' + sdp.join(' ');
};
// Parses an ice-options line, returns an array of option tags.
// a=ice-options:foo bar
SDPUtils.parseIceOptions = function(line) {
return line.substr(14).split(' ');
};
// Parses an rtpmap line, returns RTCRtpCoddecParameters. Sample input:
// a=rtpmap:111 opus/48000/2
SDPUtils.parseRtpMap = function(line) {
var parts = line.substr(9).split(' ');
var parsed = {
payloadType: parseInt(parts.shift(), 10) // was: id
};
parts = parts[0].split('/');
parsed.name = parts[0];
parsed.clockRate = parseInt(parts[1], 10); // was: clockrate
parsed.channels = parts.length === 3 ? parseInt(parts[2], 10) : 1;
// legacy alias, got renamed back to channels in ORTC.
parsed.numChannels = parsed.channels;
return parsed;
};
// Generate an a=rtpmap line from RTCRtpCodecCapability or
// RTCRtpCodecParameters.
SDPUtils.writeRtpMap = function(codec) {
var pt = codec.payloadType;
if (codec.preferredPayloadType !== undefined) {
pt = codec.preferredPayloadType;
}
var channels = codec.channels || codec.numChannels || 1;
return 'a=rtpmap:' + pt + ' ' + codec.name + '/' + codec.clockRate +
(channels !== 1 ? '/' + channels : '') + '\r\n';
};
// Parses an a=extmap line (headerextension from RFC 5285). Sample input:
// a=extmap:2 urn:ietf:params:rtp-hdrext:toffset
// a=extmap:2/sendonly urn:ietf:params:rtp-hdrext:toffset
SDPUtils.parseExtmap = function(line) {
var parts = line.substr(9).split(' ');
return {
id: parseInt(parts[0], 10),
direction: parts[0].indexOf('/') > 0 ? parts[0].split('/')[1] : 'sendrecv',
uri: parts[1]
};
};
// Generates a=extmap line from RTCRtpHeaderExtensionParameters or
// RTCRtpHeaderExtension.
SDPUtils.writeExtmap = function(headerExtension) {
return 'a=extmap:' + (headerExtension.id || headerExtension.preferredId) +
(headerExtension.direction && headerExtension.direction !== 'sendrecv'
? '/' + headerExtension.direction
: '') +
' ' + headerExtension.uri + '\r\n';
};
// Parses an ftmp line, returns dictionary. Sample input:
// a=fmtp:96 vbr=on;cng=on
// Also deals with vbr=on; cng=on
SDPUtils.parseFmtp = function(line) {
var parsed = {};
var kv;
var parts = line.substr(line.indexOf(' ') + 1).split(';');
for (var j = 0; j < parts.length; j++) {
kv = parts[j].trim().split('=');
parsed[kv[0].trim()] = kv[1];
}
return parsed;
};
// Generates an a=ftmp line from RTCRtpCodecCapability or RTCRtpCodecParameters.
SDPUtils.writeFmtp = function(codec) {
var line = '';
var pt = codec.payloadType;
if (codec.preferredPayloadType !== undefined) {
pt = codec.preferredPayloadType;
}
if (codec.parameters && Object.keys(codec.parameters).length) {
var params = [];
Object.keys(codec.parameters).forEach(function(param) {
if (codec.parameters[param]) {
params.push(param + '=' + codec.parameters[param]);
} else {
params.push(param);
}
});
line += 'a=fmtp:' + pt + ' ' + params.join(';') + '\r\n';
}
return line;
};
// Parses an rtcp-fb line, returns RTCPRtcpFeedback object. Sample input:
// a=rtcp-fb:98 nack rpsi
SDPUtils.parseRtcpFb = function(line) {
var parts = line.substr(line.indexOf(' ') + 1).split(' ');
return {
type: parts.shift(),
parameter: parts.join(' ')
};
};
// Generate a=rtcp-fb lines from RTCRtpCodecCapability or RTCRtpCodecParameters.
SDPUtils.writeRtcpFb = function(codec) {
var lines = '';
var pt = codec.payloadType;
if (codec.preferredPayloadType !== undefined) {
pt = codec.preferredPayloadType;
}
if (codec.rtcpFeedback && codec.rtcpFeedback.length) {
// FIXME: special handling for trr-int?
codec.rtcpFeedback.forEach(function(fb) {
lines += 'a=rtcp-fb:' + pt + ' ' + fb.type +
(fb.parameter && fb.parameter.length ? ' ' + fb.parameter : '') +
'\r\n';
});
}
return lines;
};
// Parses an RFC 5576 ssrc media attribute. Sample input:
// a=ssrc:3735928559 cname:something
SDPUtils.parseSsrcMedia = function(line) {
var sp = line.indexOf(' ');
var parts = {
ssrc: parseInt(line.substr(7, sp - 7), 10)
};
var colon = line.indexOf(':', sp);
if (colon > -1) {
parts.attribute = line.substr(sp + 1, colon - sp - 1);
parts.value = line.substr(colon + 1);
} else {
parts.attribute = line.substr(sp + 1);
}
return parts;
};
SDPUtils.parseSsrcGroup = function(line) {
var parts = line.substr(13).split(' ');
return {
semantics: parts.shift(),
ssrcs: parts.map(function(ssrc) {
return parseInt(ssrc, 10);
})
};
};
// Extracts the MID (RFC 5888) from a media section.
// returns the MID or undefined if no mid line was found.
SDPUtils.getMid = function(mediaSection) {
var mid = SDPUtils.matchPrefix(mediaSection, 'a=mid:')[0];
if (mid) {
return mid.substr(6);
}
};
SDPUtils.parseFingerprint = function(line) {
var parts = line.substr(14).split(' ');
return {
algorithm: parts[0].toLowerCase(), // algorithm is case-sensitive in Edge.
value: parts[1]
};
};
// Extracts DTLS parameters from SDP media section or sessionpart.
// FIXME: for consistency with other functions this should only
// get the fingerprint line as input. See also getIceParameters.
SDPUtils.getDtlsParameters = function(mediaSection, sessionpart) {
var lines = SDPUtils.matchPrefix(mediaSection + sessionpart,
'a=fingerprint:');
// Note: a=setup line is ignored since we use the 'auto' role.
// Note2: 'algorithm' is not case sensitive except in Edge.
return {
role: 'auto',
fingerprints: lines.map(SDPUtils.parseFingerprint)
};
};
// Serializes DTLS parameters to SDP.
SDPUtils.writeDtlsParameters = function(params, setupType) {
var sdp = 'a=setup:' + setupType + '\r\n';
params.fingerprints.forEach(function(fp) {
sdp += 'a=fingerprint:' + fp.algorithm + ' ' + fp.value + '\r\n';
});
return sdp;
};
// Parses ICE information from SDP media section or sessionpart.
// FIXME: for consistency with other functions this should only
// get the ice-ufrag and ice-pwd lines as input.
SDPUtils.getIceParameters = function(mediaSection, sessionpart) {
var lines = SDPUtils.splitLines(mediaSection);
// Search in session part, too.
lines = lines.concat(SDPUtils.splitLines(sessionpart));
var iceParameters = {
usernameFragment: lines.filter(function(line) {
return line.indexOf('a=ice-ufrag:') === 0;
})[0].substr(12),
password: lines.filter(function(line) {
return line.indexOf('a=ice-pwd:') === 0;
})[0].substr(10)
};
return iceParameters;
};
// Serializes ICE parameters to SDP.
SDPUtils.writeIceParameters = function(params) {
return 'a=ice-ufrag:' + params.usernameFragment + '\r\n' +
'a=ice-pwd:' + params.password + '\r\n';
};
// Parses the SDP media section and returns RTCRtpParameters.
SDPUtils.parseRtpParameters = function(mediaSection) {
var description = {
codecs: [],
headerExtensions: [],
fecMechanisms: [],
rtcp: []
};
var lines = SDPUtils.splitLines(mediaSection);
var mline = lines[0].split(' ');
for (var i = 3; i < mline.length; i++) { // find all codecs from mline[3..]
var pt = mline[i];
var rtpmapline = SDPUtils.matchPrefix(
mediaSection, 'a=rtpmap:' + pt + ' ')[0];
if (rtpmapline) {
var codec = SDPUtils.parseRtpMap(rtpmapline);
var fmtps = SDPUtils.matchPrefix(
mediaSection, 'a=fmtp:' + pt + ' ');
// Only the first a=fmtp:<pt> is considered.
codec.parameters = fmtps.length ? SDPUtils.parseFmtp(fmtps[0]) : {};
codec.rtcpFeedback = SDPUtils.matchPrefix(
mediaSection, 'a=rtcp-fb:' + pt + ' ')
.map(SDPUtils.parseRtcpFb);
description.codecs.push(codec);
// parse FEC mechanisms from rtpmap lines.
switch (codec.name.toUpperCase()) {
case 'RED':
case 'ULPFEC':
description.fecMechanisms.push(codec.name.toUpperCase());
break;
default: // only RED and ULPFEC are recognized as FEC mechanisms.
break;
}
}
}
SDPUtils.matchPrefix(mediaSection, 'a=extmap:').forEach(function(line) {
description.headerExtensions.push(SDPUtils.parseExtmap(line));
});
// FIXME: parse rtcp.
return description;
};
// Generates parts of the SDP media section describing the capabilities /
// parameters.
SDPUtils.writeRtpDescription = function(kind, caps) {
var sdp = '';
// Build the mline.
sdp += 'm=' + kind + ' ';
sdp += caps.codecs.length > 0 ? '9' : '0'; // reject if no codecs.
sdp += ' UDP/TLS/RTP/SAVPF ';
sdp += caps.codecs.map(function(codec) {
if (codec.preferredPayloadType !== undefined) {
return codec.preferredPayloadType;
}
return codec.payloadType;
}).join(' ') + '\r\n';
sdp += 'c=IN IP4 0.0.0.0\r\n';
sdp += 'a=rtcp:9 IN IP4 0.0.0.0\r\n';
// Add a=rtpmap lines for each codec. Also fmtp and rtcp-fb.
caps.codecs.forEach(function(codec) {
sdp += SDPUtils.writeRtpMap(codec);
sdp += SDPUtils.writeFmtp(codec);
sdp += SDPUtils.writeRtcpFb(codec);
});
var maxptime = 0;
caps.codecs.forEach(function(codec) {
if (codec.maxptime > maxptime) {
maxptime = codec.maxptime;
}
});
if (maxptime > 0) {
sdp += 'a=maxptime:' + maxptime + '\r\n';
}
sdp += 'a=rtcp-mux\r\n';
if (caps.headerExtensions) {
caps.headerExtensions.forEach(function(extension) {
sdp += SDPUtils.writeExtmap(extension);
});
}
// FIXME: write fecMechanisms.
return sdp;
};
// Parses the SDP media section and returns an array of
// RTCRtpEncodingParameters.
SDPUtils.parseRtpEncodingParameters = function(mediaSection) {
var encodingParameters = [];
var description = SDPUtils.parseRtpParameters(mediaSection);
var hasRed = description.fecMechanisms.indexOf('RED') !== -1;
var hasUlpfec = description.fecMechanisms.indexOf('ULPFEC') !== -1;
// filter a=ssrc:... cname:, ignore PlanB-msid
var ssrcs = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:')
.map(function(line) {
return SDPUtils.parseSsrcMedia(line);
})
.filter(function(parts) {
return parts.attribute === 'cname';
});
var primarySsrc = ssrcs.length > 0 && ssrcs[0].ssrc;
var secondarySsrc;
var flows = SDPUtils.matchPrefix(mediaSection, 'a=ssrc-group:FID')
.map(function(line) {
var parts = line.substr(17).split(' ');
return parts.map(function(part) {
return parseInt(part, 10);
});
});
if (flows.length > 0 && flows[0].length > 1 && flows[0][0] === primarySsrc) {
secondarySsrc = flows[0][1];
}
description.codecs.forEach(function(codec) {
if (codec.name.toUpperCase() === 'RTX' && codec.parameters.apt) {
var encParam = {
ssrc: primarySsrc,
codecPayloadType: parseInt(codec.parameters.apt, 10)
};
if (primarySsrc && secondarySsrc) {
encParam.rtx = {ssrc: secondarySsrc};
}
encodingParameters.push(encParam);
if (hasRed) {
encParam = JSON.parse(JSON.stringify(encParam));
encParam.fec = {
ssrc: primarySsrc,
mechanism: hasUlpfec ? 'red+ulpfec' : 'red'
};
encodingParameters.push(encParam);
}
}
});
if (encodingParameters.length === 0 && primarySsrc) {
encodingParameters.push({
ssrc: primarySsrc
});
}
// we support both b=AS and b=TIAS but interpret AS as TIAS.
var bandwidth = SDPUtils.matchPrefix(mediaSection, 'b=');
if (bandwidth.length) {
if (bandwidth[0].indexOf('b=TIAS:') === 0) {
bandwidth = parseInt(bandwidth[0].substr(7), 10);
} else if (bandwidth[0].indexOf('b=AS:') === 0) {
// use formula from JSEP to convert b=AS to TIAS value.
bandwidth = parseInt(bandwidth[0].substr(5), 10) * 1000 * 0.95
- (50 * 40 * 8);
} else {
bandwidth = undefined;
}
encodingParameters.forEach(function(params) {
params.maxBitrate = bandwidth;
});
}
return encodingParameters;
};
// parses http://draft.ortc.org/#rtcrtcpparameters*
SDPUtils.parseRtcpParameters = function(mediaSection) {
var rtcpParameters = {};
// Gets the first SSRC. Note tha with RTX there might be multiple
// SSRCs.
var remoteSsrc = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:')
.map(function(line) {
return SDPUtils.parseSsrcMedia(line);
})
.filter(function(obj) {
return obj.attribute === 'cname';
})[0];
if (remoteSsrc) {
rtcpParameters.cname = remoteSsrc.value;
rtcpParameters.ssrc = remoteSsrc.ssrc;
}
// Edge uses the compound attribute instead of reducedSize
// compound is !reducedSize
var rsize = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-rsize');
rtcpParameters.reducedSize = rsize.length > 0;
rtcpParameters.compound = rsize.length === 0;
// parses the rtcp-mux attrіbute.
// Note that Edge does not support unmuxed RTCP.
var mux = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-mux');
rtcpParameters.mux = mux.length > 0;
return rtcpParameters;
};
// parses either a=msid: or a=ssrc:... msid lines and returns
// the id of the MediaStream and MediaStreamTrack.
SDPUtils.parseMsid = function(mediaSection) {
var parts;
var spec = SDPUtils.matchPrefix(mediaSection, 'a=msid:');
if (spec.length === 1) {
parts = spec[0].substr(7).split(' ');
return {stream: parts[0], track: parts[1]};
}
var planB = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:')
.map(function(line) {
return SDPUtils.parseSsrcMedia(line);
})
.filter(function(msidParts) {
return msidParts.attribute === 'msid';
});
if (planB.length > 0) {
parts = planB[0].value.split(' ');
return {stream: parts[0], track: parts[1]};
}
};
// Generate a session ID for SDP.
// https://tools.ietf.org/html/draft-ietf-rtcweb-jsep-20#section-5.2.1
// recommends using a cryptographically random +ve 64-bit value
// but right now this should be acceptable and within the right range
SDPUtils.generateSessionId = function() {
return Math.random().toString().substr(2, 21);
};
// Write boilder plate for start of SDP
// sessId argument is optional - if not supplied it will
// be generated randomly
// sessVersion is optional and defaults to 2
// sessUser is optional and defaults to 'thisisadapterortc'
SDPUtils.writeSessionBoilerplate = function(sessId, sessVer, sessUser) {
var sessionId;
var version = sessVer !== undefined ? sessVer : 2;
if (sessId) {
sessionId = sessId;
} else {
sessionId = SDPUtils.generateSessionId();
}
var user = sessUser || 'thisisadapterortc';
// FIXME: sess-id should be an NTP timestamp.
return 'v=0\r\n' +
'o=' + user + ' ' + sessionId + ' ' + version +
' IN IP4 127.0.0.1\r\n' +
's=-\r\n' +
't=0 0\r\n';
};
SDPUtils.writeMediaSection = function(transceiver, caps, type, stream) {
var sdp = SDPUtils.writeRtpDescription(transceiver.kind, caps);
// Map ICE parameters (ufrag, pwd) to SDP.
sdp += SDPUtils.writeIceParameters(
transceiver.iceGatherer.getLocalParameters());
// Map DTLS parameters to SDP.
sdp += SDPUtils.writeDtlsParameters(
transceiver.dtlsTransport.getLocalParameters(),
type === 'offer' ? 'actpass' : 'active');
sdp += 'a=mid:' + transceiver.mid + '\r\n';
if (transceiver.direction) {
sdp += 'a=' + transceiver.direction + '\r\n';
} else if (transceiver.rtpSender && transceiver.rtpReceiver) {
sdp += 'a=sendrecv\r\n';
} else if (transceiver.rtpSender) {
sdp += 'a=sendonly\r\n';
} else if (transceiver.rtpReceiver) {
sdp += 'a=recvonly\r\n';
} else {
sdp += 'a=inactive\r\n';
}
if (transceiver.rtpSender) {
// spec.
var msid = 'msid:' + stream.id + ' ' +
transceiver.rtpSender.track.id + '\r\n';
sdp += 'a=' + msid;
// for Chrome.
sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc +
' ' + msid;
if (transceiver.sendEncodingParameters[0].rtx) {
sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].rtx.ssrc +
' ' + msid;
sdp += 'a=ssrc-group:FID ' +
transceiver.sendEncodingParameters[0].ssrc + ' ' +
transceiver.sendEncodingParameters[0].rtx.ssrc +
'\r\n';
}
}
// FIXME: this should be written by writeRtpDescription.
sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc +
' cname:' + SDPUtils.localCName + '\r\n';
if (transceiver.rtpSender && transceiver.sendEncodingParameters[0].rtx) {
sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].rtx.ssrc +
' cname:' + SDPUtils.localCName + '\r\n';
}
return sdp;
};
// Gets the direction from the mediaSection or the sessionpart.
SDPUtils.getDirection = function(mediaSection, sessionpart) {
// Look for sendrecv, sendonly, recvonly, inactive, default to sendrecv.
var lines = SDPUtils.splitLines(mediaSection);
for (var i = 0; i < lines.length; i++) {
switch (lines[i]) {
case 'a=sendrecv':
case 'a=sendonly':
case 'a=recvonly':
case 'a=inactive':
return lines[i].substr(2);
default:
// FIXME: What should happen here?
}
}
if (sessionpart) {
return SDPUtils.getDirection(sessionpart);
}
return 'sendrecv';
};
SDPUtils.getKind = function(mediaSection) {
var lines = SDPUtils.splitLines(mediaSection);
var mline = lines[0].split(' ');
return mline[0].substr(2);
};
SDPUtils.isRejected = function(mediaSection) {
return mediaSection.split(' ', 2)[1] === '0';
};
SDPUtils.parseMLine = function(mediaSection) {
var lines = SDPUtils.splitLines(mediaSection);
var parts = lines[0].substr(2).split(' ');
return {
kind: parts[0],
port: parseInt(parts[1], 10),
protocol: parts[2],
fmt: parts.slice(3).join(' ')
};
};
SDPUtils.parseOLine = function(mediaSection) {
var line = SDPUtils.matchPrefix(mediaSection, 'o=')[0];
var parts = line.substr(2).split(' ');
return {
username: parts[0],
sessionId: parts[1],
sessionVersion: parseInt(parts[2], 10),
netType: parts[3],
addressType: parts[4],
address: parts[5]
};
};
// a very naive interpretation of a valid SDP.
SDPUtils.isValidSDP = function(blob) {
if (typeof blob !== 'string' || blob.length === 0) {
return false;
}
var lines = SDPUtils.splitLines(blob);
for (var i = 0; i < lines.length; i++) {
if (lines[i].length < 2 || lines[i].charAt(1) !== '=') {
return false;
}
// TODO: check the modifier a bit more.
}
return true;
};
// Expose public methods.
if (typeof module === 'object') {
module.exports = SDPUtils;
}
},{}],3:[function(require,module,exports){
(function (global){
/*
* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree.
*/
/* eslint-env node */
'use strict';
var adapterFactory = require('./adapter_factory.js');
module.exports = adapterFactory({window: global.window});
}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./adapter_factory.js":4}],4:[function(require,module,exports){
/*
* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree.
*/
/* eslint-env node */
'use strict';
var utils = require('./utils');
// Shimming starts here.
module.exports = function(dependencies, opts) {
var window = dependencies && dependencies.window;
var options = {
shimChrome: true,
shimFirefox: true,
shimEdge: true,
shimSafari: true,
};
for (var key in opts) {
if (hasOwnProperty.call(opts, key)) {
options[key] = opts[key];
}
}
// Utils.
var logging = utils.log;
var browserDetails = utils.detectBrowser(window);
// Uncomment the line below if you want logging to occur, including logging
// for the switch statement below. Can also be turned on in the browser via
// adapter.disableLog(false), but then logging from the switch statement below
// will not appear.
// require('./utils').disableLog(false);
// Browser shims.
var chromeShim = require('./chrome/chrome_shim') || null;
var edgeShim = require('./edge/edge_shim') || null;
var firefoxShim = require('./firefox/firefox_shim') || null;
var safariShim = require('./safari/safari_shim') || null;
var commonShim = require('./common_shim') || null;
// Export to the adapter global object visible in the browser.
var adapter = {
browserDetails: browserDetails,
commonShim: commonShim,
extractVersion: utils.extractVersion,
disableLog: utils.disableLog,
disableWarnings: utils.disableWarnings
};
// Shim browser if found.
switch (browserDetails.browser) {
case 'chrome':
if (!chromeShim || !chromeShim.shimPeerConnection ||
!options.shimChrome) {
logging('Chrome shim is not included in this adapter release.');
return adapter;
}
logging('adapter.js shimming chrome.');
// Export to the adapter global object visible in the browser.
adapter.browserShim = chromeShim;
commonShim.shimCreateObjectURL(window);
chromeShim.shimGetUserMedia(window);
chromeShim.shimMediaStream(window);
chromeShim.shimSourceObject(window);
chromeShim.shimPeerConnection(window);
chromeShim.shimOnTrack(window);
chromeShim.shimAddTrackRemoveTrack(window);
chromeShim.shimGetSendersWithDtmf(window);
chromeShim.shimSenderReceiverGetStats(window);
chromeShim.fixNegotiationNeeded(window);
commonShim.shimRTCIceCandidate(window);
commonShim.shimMaxMessageSize(window);
commonShim.shimSendThrowTypeError(window);
break;
case 'firefox':
if (!firefoxShim || !firefoxShim.shimPeerConnection ||
!options.shimFirefox) {
logging('Firefox shim is not included in this adapter release.');
return adapter;
}
logging('adapter.js shimming firefox.');
// Export to the adapter global object visible in the browser.
adapter.browserShim = firefoxShim;
commonShim.shimCreateObjectURL(window);
firefoxShim.shimGetUserMedia(window);
firefoxShim.shimSourceObject(window);
firefoxShim.shimPeerConnection(window);
firefoxShim.shimOnTrack(window);
firefoxShim.shimRemoveStream(window);
firefoxShim.shimSenderGetStats(window);
firefoxShim.shimReceiverGetStats(window);
firefoxShim.shimRTCDataChannel(window);
commonShim.shimRTCIceCandidate(window);
commonShim.shimMaxMessageSize(window);
commonShim.shimSendThrowTypeError(window);
break;
case 'edge':
if (!edgeShim || !edgeShim.shimPeerConnection || !options.shimEdge) {
logging('MS edge shim is not included in this adapter release.');
return adapter;
}
logging('adapter.js shimming edge.');
// Export to the adapter global object visible in the browser.
adapter.browserShim = edgeShim;
commonShim.shimCreateObjectURL(window);
edgeShim.shimGetUserMedia(window);
edgeShim.shimPeerConnection(window);
edgeShim.shimReplaceTrack(window);
// the edge shim implements the full RTCIceCandidate object.
commonShim.shimMaxMessageSize(window);
commonShim.shimSendThrowTypeError(window);
break;
case 'safari':
if (!safariShim || !options.shimSafari) {
logging('Safari shim is not included in this adapter release.');
return adapter;
}
logging('adapter.js shimming safari.');
// Export to the adapter global object visible in the browser.
adapter.browserShim = safariShim;
commonShim.shimCreateObjectURL(window);
safariShim.shimRTCIceServerUrls(window);
safariShim.shimCreateOfferLegacy(window);
safariShim.shimCallbacksAPI(window);
safariShim.shimLocalStreamsAPI(window);
safariShim.shimRemoteStreamsAPI(window);
safariShim.shimTrackEventTransceiver(window);
safariShim.shimGetUserMedia(window);
commonShim.shimRTCIceCandidate(window);
commonShim.shimMaxMessageSize(window);
commonShim.shimSendThrowTypeError(window);
break;
default:
logging('Unsupported browser!');
break;
}
return adapter;
};
},{"./chrome/chrome_shim":5,"./common_shim":7,"./edge/edge_shim":8,"./firefox/firefox_shim":11,"./safari/safari_shim":13,"./utils":14}],5:[function(require,module,exports){
/*
* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree.
*/
/* eslint-env node */
'use strict';
var utils = require('../utils.js');
var logging = utils.log;
/* iterates the stats graph recursively. */
function walkStats(stats, base, resultSet) {
if (!base || resultSet.has(base.id)) {
return;
}
resultSet.set(base.id, base);
Object.keys(base).forEach(function(name) {
if (name.endsWith('Id')) {
walkStats(stats, stats.get(base[name]), resultSet);
} else if (name.endsWith('Ids')) {
base[name].forEach(function(id) {
walkStats(stats, stats.get(id), resultSet);
});
}
});
}
/* filter getStats for a sender/receiver track. */
function filterStats(result, track, outbound) {
var streamStatsType = outbound ? 'outbound-rtp' : 'inbound-rtp';
var filteredResult = new Map();
if (track === null) {
return filteredResult;
}
var trackStats = [];
result.forEach(function(value) {
if (value.type === 'track' &&
value.trackIdentifier === track.id) {
trackStats.push(value);
}
});
trackStats.forEach(function(trackStat) {
result.forEach(function(stats) {
if (stats.type === streamStatsType && stats.trackId === trackStat.id) {
walkStats(result, stats, filteredResult);
}
});
});
return filteredResult;
}
module.exports = {
shimGetUserMedia: require('./getusermedia'),
shimMediaStream: function(window) {
window.MediaStream = window.MediaStream || window.webkitMediaStream;
},
shimOnTrack: function(window) {
if (typeof window === 'object' && window.RTCPeerConnection && !('ontrack' in
window.RTCPeerConnection.prototype)) {
Object.defineProperty(window.RTCPeerConnection.prototype, 'ontrack', {
get: function() {
return this._ontrack;
},
set: function(f) {
if (this._ontrack) {
this.removeEventListener('track', this._ontrack);
}
this.addEventListener('track', this._ontrack = f);
},
enumerable: true,
configurable: true
});
var origSetRemoteDescription =
window.RTCPeerConnection.prototype.setRemoteDescription;
window.RTCPeerConnection.prototype.setRemoteDescription = function() {
var pc = this;
if (!pc._ontrackpoly) {
pc._ontrackpoly = function(e) {
// onaddstream does not fire when a track is added to an existing
// stream. But stream.onaddtrack is implemented so we use that.
e.stream.addEventListener('addtrack', function(te) {
var receiver;
if (window.RTCPeerConnection.prototype.getReceivers) {
receiver = pc.getReceivers().find(function(r) {
return r.track && r.track.id === te.track.id;
});
} else {
receiver = {track: te.track};
}
var event = new Event('track');
event.track = te.track;
event.receiver = receiver;
event.transceiver = {receiver: receiver};
event.streams = [e.stream];
pc.dispatchEvent(event);
});
e.stream.getTracks().forEach(function(track) {
var receiver;
if (window.RTCPeerConnection.prototype.getReceivers) {
receiver = pc.getReceivers().find(function(r) {
return r.track && r.track.id === track.id;
});
} else {
receiver = {track: track};
}
var event = new Event('track');
event.track = track;
event.receiver = receiver;
event.transceiver = {receiver: receiver};
event.streams = [e.stream];
pc.dispatchEvent(event);
});
};
pc.addEventListener('addstream', pc._ontrackpoly);
}
return origSetRemoteDescription.apply(pc, arguments);
};
} else {
// even if RTCRtpTransceiver is in window, it is only used and
// emitted in unified-plan. Unfortunately this means we need
// to unconditionally wrap the event.
utils.wrapPeerConnectionEvent(window, 'track', function(e) {
if (!e.transceiver) {
Object.defineProperty(e, 'transceiver',
{value: {receiver: e.receiver}});
}
return e;
});
}
},
shimGetSendersWithDtmf: function(window) {
// Overrides addTrack/removeTrack, depends on shimAddTrackRemoveTrack.
if (typeof window === 'object' && window.RTCPeerConnection &&
!('getSenders' in window.RTCPeerConnection.prototype) &&
'createDTMFSender' in window.RTCPeerConnection.prototype) {
var shimSenderWithDtmf = function(pc, track) {
return {
track: track,
get dtmf() {
if (this._dtmf === undefined) {
if (track.kind === 'audio') {
this._dtmf = pc.createDTMFSender(track);
} else {
this._dtmf = null;
}
}
return this._dtmf;
},
_pc: pc
};
};
// augment addTrack when getSenders is not available.
if (!window.RTCPeerConnection.prototype.getSenders) {
window.RTCPeerConnection.prototype.getSenders = function() {
this._senders = this._senders || [];
return this._senders.slice(); // return a copy of the internal state.
};
var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
window.RTCPeerConnection.prototype.addTrack = function(track, stream) {
var pc = this;
var sender = origAddTrack.apply(pc, arguments);
if (!sender) {
sender = shimSenderWithDtmf(pc, track);
pc._senders.push(sender);
}
return sender;
};
var origRemoveTrack = window.RTCPeerConnection.prototype.removeTrack;
window.RTCPeerConnection.prototype.removeTrack = function(sender) {
var pc = this;
origRemoveTrack.apply(pc, arguments);
var idx = pc._senders.indexOf(sender);
if (idx !== -1) {
pc._senders.splice(idx, 1);
}
};
}
var origAddStream = window.RTCPeerConnection.prototype.addStream;
window.RTCPeerConnection.prototype.addStream = function(stream) {
var pc = this;
pc._senders = pc._senders || [];
origAddStream.apply(pc, [stream]);
stream.getTracks().forEach(function(track) {
pc._senders.push(shimSenderWithDtmf(pc, track));
});
};
var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;
window.RTCPeerConnection.prototype.removeStream = function(stream) {
var pc = this;
pc._senders = pc._senders || [];
origRemoveStream.apply(pc, [stream]);
stream.getTracks().forEach(function(track) {
var sender = pc._senders.find(function(s) {
return s.track === track;
});
if (sender) {
pc._senders.splice(pc._senders.indexOf(sender), 1); // remove sender
}
});
};
} else if (typeof window === 'object' && window.RTCPeerConnection &&
'getSenders' in window.RTCPeerConnection.prototype &&
'createDTMFSender' in window.RTCPeerConnection.prototype &&
window.RTCRtpSender &&
!('dtmf' in window.RTCRtpSender.prototype)) {
var origGetSenders = window.RTCPeerConnection.prototype.getSenders;
window.RTCPeerConnection.prototype.getSenders = function() {
var pc = this;
var senders = origGetSenders.apply(pc, []);
senders.forEach(function(sender) {
sender._pc = pc;
});
return senders;
};
Object.defineProperty(window.RTCRtpSender.prototype, 'dtmf', {
get: function() {
if (this._dtmf === undefined) {
if (this.track.kind === 'audio') {
this._dtmf = this._pc.createDTMFSender(this.track);
} else {
this._dtmf = null;
}
}
return this._dtmf;
}
});
}
},
shimSenderReceiverGetStats: function(window) {
if (!(typeof window === 'object' && window.RTCPeerConnection &&
window.RTCRtpSender && window.RTCRtpReceiver)) {
return;
}
// shim sender stats.
if (!('getStats' in window.RTCRtpSender.prototype)) {
var origGetSenders = window.RTCPeerConnection.prototype.getSenders;
if (origGetSenders) {
window.RTCPeerConnection.prototype.getSenders = function() {
var pc = this;
var senders = origGetSenders.apply(pc, []);
senders.forEach(function(sender) {
sender._pc = pc;
});
return senders;
};
}
var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
if (origAddTrack) {
window.RTCPeerConnection.prototype.addTrack = function() {
var sender = origAddTrack.apply(this, arguments);
sender._pc = this;
return sender;
};
}
window.RTCRtpSender.prototype.getStats = function() {
var sender = this;
return this._pc.getStats().then(function(result) {
/* Note: this will include stats of all senders that
* send a track with the same id as sender.track as
* it is not possible to identify the RTCRtpSender.
*/
return filterStats(result, sender.track, true);
});
};
}
// shim receiver stats.
if (!('getStats' in window.RTCRtpReceiver.prototype)) {
var origGetReceivers = window.RTCPeerConnection.prototype.getReceivers;
if (origGetReceivers) {
window.RTCPeerConnection.prototype.getReceivers = function() {
var pc = this;
var receivers = origGetReceivers.apply(pc, []);
receivers.forEach(function(receiver) {
receiver._pc = pc;
});
return receivers;
};
}
utils.wrapPeerConnectionEvent(window, 'track', function(e) {
e.receiver._pc = e.srcElement;
return e;
});
window.RTCRtpReceiver.prototype.getStats = function() {
var receiver = this;
return this._pc.getStats().then(function(result) {
return filterStats(result, receiver.track, false);
});
};
}
if (!('getStats' in window.RTCRtpSender.prototype &&
'getStats' in window.RTCRtpReceiver.prototype)) {
return;
}
// shim RTCPeerConnection.getStats(track).
var origGetStats = window.RTCPeerConnection.prototype.getStats;
window.RTCPeerConnection.prototype.getStats = function() {
var pc = this;
if (arguments.length > 0 &&
arguments[0] instanceof window.MediaStreamTrack) {
var track = arguments[0];
var sender;
var receiver;
var err;
pc.getSenders().forEach(function(s) {
if (s.track === track) {
if (sender) {
err = true;
} else {
sender = s;
}
}
});
pc.getReceivers().forEach(function(r) {
if (r.track === track) {
if (receiver) {
err = true;
} else {
receiver = r;
}
}
return r.track === track;
});
if (err || (sender && receiver)) {
return Promise.reject(new DOMException(
'There are more than one sender or receiver for the track.',
'InvalidAccessError'));
} else if (sender) {
return sender.getStats();
} else if (receiver) {
return receiver.getStats();
}
return Promise.reject(new DOMException(
'There is no sender or receiver for the track.',
'InvalidAccessError'));
}
return origGetStats.apply(pc, arguments);
};
},
shimSourceObject: function(window) {
var URL = window && window.URL;
if (typeof window === 'object') {
if (window.HTMLMediaElement &&
!('srcObject' in window.HTMLMediaElement.prototype)) {
// Shim the srcObject property, once, when HTMLMediaElement is found.
Object.defineProperty(window.HTMLMediaElement.prototype, 'srcObject', {
get: function() {
return this._srcObject;
},
set: function(stream) {
var self = this;
// Use _srcObject as a private property for this shim
this._srcObject = stream;
if (this.src) {
URL.revokeObjectURL(this.src);
}
if (!stream) {
this.src = '';
return undefined;
}
this.src = URL.createObjectURL(stream);
// We need to recreate the blob url when a track is added or
// removed. Doing it manually since we want to avoid a recursion.
stream.addEventListener('addtrack', function() {
if (self.src) {
URL.revokeObjectURL(self.src);
}
self.src = URL.createObjectURL(stream);
});
stream.addEventListener('removetrack', function() {
if (self.src) {
URL.revokeObjectURL(self.src);
}
self.src = URL.createObjectURL(stream);
});
}
});
}
}
},
shimAddTrackRemoveTrackWithNative: function(window) {
// shim addTrack/removeTrack with native variants in order to make
// the interactions with legacy getLocalStreams behave as in other browsers.
// Keeps a mapping stream.id => [stream, rtpsenders...]
window.RTCPeerConnection.prototype.getLocalStreams = function() {
var pc = this;
this._shimmedLocalStreams = this._shimmedLocalStreams || {};
return Object.keys(this._shimmedLocalStreams).map(function(streamId) {
return pc._shimmedLocalStreams[streamId][0];
});
};
var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
window.RTCPeerConnection.prototype.addTrack = function(track, stream) {
if (!stream) {
return origAddTrack.apply(this, arguments);
}
this._shimmedLocalStreams = this._shimmedLocalStreams || {};
var sender = origAddTrack.apply(this, arguments);
if (!this._shimmedLocalStreams[stream.id]) {
this._shimmedLocalStreams[stream.id] = [stream, sender];
} else if (this._shimmedLocalStreams[stream.id].indexOf(sender) === -1) {
this._shimmedLocalStreams[stream.id].push(sender);
}
return sender;
};
var origAddStream = window.RTCPeerConnection.prototype.addStream;
window.RTCPeerConnection.prototype.addStream = function(stream) {
var pc = this;
this._shimmedLocalStreams = this._shimmedLocalStreams || {};
stream.getTracks().forEach(function(track) {
var alreadyExists = pc.getSenders().find(function(s) {
return s.track === track;
});
if (alreadyExists) {
throw new DOMException('Track already exists.',
'InvalidAccessError');
}
});
var existingSenders = pc.getSenders();
origAddStream.apply(this, arguments);
var newSenders = pc.getSenders().filter(function(newSender) {
return existingSenders.indexOf(newSender) === -1;
});
this._shimmedLocalStreams[stream.id] = [stream].concat(newSenders);
};
var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;
window.RTCPeerConnection.prototype.removeStream = function(stream) {
this._shimmedLocalStreams = this._shimmedLocalStreams || {};
delete this._shimmedLocalStreams[stream.id];
return origRemoveStream.apply(this, arguments);
};
var origRemoveTrack = window.RTCPeerConnection.prototype.removeTrack;
window.RTCPeerConnection.prototype.removeTrack = function(sender) {
var pc = this;
this._shimmedLocalStreams = this._shimmedLocalStreams || {};
if (sender) {
Object.keys(this._shimmedLocalStreams).forEach(function(streamId) {
var idx = pc._shimmedLocalStreams[streamId].indexOf(sender);
if (idx !== -1) {
pc._shimmedLocalStreams[streamId].splice(idx, 1);
}
if (pc._shimmedLocalStreams[streamId].length === 1) {
delete pc._shimmedLocalStreams[streamId];
}
});
}
return origRemoveTrack.apply(this, arguments);
};
},
shimAddTrackRemoveTrack: function(window) {
var browserDetails = utils.detectBrowser(window);
// shim addTrack and removeTrack.
if (window.RTCPeerConnection.prototype.addTrack &&
browserDetails.version >= 65) {
return this.shimAddTrackRemoveTrackWithNative(window);
}
// also shim pc.getLocalStreams when addTrack is shimmed
// to return the original streams.
var origGetLocalStreams = window.RTCPeerConnection.prototype
.getLocalStreams;
window.RTCPeerConnection.prototype.getLocalStreams = function() {
var pc = this;
var nativeStreams = origGetLocalStreams.apply(this);
pc._reverseStreams = pc._reverseStreams || {};
return nativeStreams.map(function(stream) {
return pc._reverseStreams[stream.id];
});
};
var origAddStream = window.RTCPeerConnection.prototype.addStream;
window.RTCPeerConnection.prototype.addStream = function(stream) {
var pc = this;
pc._streams = pc._streams || {};
pc._reverseStreams = pc._reverseStreams || {};
stream.getTracks().forEach(function(track) {
var alreadyExists = pc.getSenders().find(function(s) {
return s.track === track;
});
if (alreadyExists) {
throw new DOMException('Track already exists.',
'InvalidAccessError');
}
});
// Add identity mapping for consistency with addTrack.
// Unless this is being used with a stream from addTrack.
if (!pc._reverseStreams[stream.id]) {
var newStream = new window.MediaStream(stream.getTracks());
pc._streams[stream.id] = newStream;
pc._reverseStreams[newStream.id] = stream;
stream = newStream;
}
origAddStream.apply(pc, [stream]);
};
var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;
window.RTCPeerConnection.prototype.removeStream = function(stream) {
var pc = this;
pc._streams = pc._streams || {};
pc._reverseStreams = pc._reverseStreams || {};
origRemoveStream.apply(pc, [(pc._streams[stream.id] || stream)]);
delete pc._reverseStreams[(pc._streams[stream.id] ?
pc._streams[stream.id].id : stream.id)];
delete pc._streams[stream.id];
};
window.RTCPeerConnection.prototype.addTrack = function(track, stream) {
var pc = this;
if (pc.signalingState === 'closed') {
throw new DOMException(
'The RTCPeerConnection\'s signalingState is \'closed\'.',
'InvalidStateError');
}
var streams = [].slice.call(arguments, 1);
if (streams.length !== 1 ||
!streams[0].getTracks().find(function(t) {
return t === track;
})) {
// this is not fully correct but all we can manage without
// [[associated MediaStreams]] internal slot.
throw new DOMException(
'The adapter.js addTrack polyfill only supports a single ' +
' stream which is associated with the specified track.',
'NotSupportedError');
}
var alreadyExists = pc.getSenders().find(function(s) {
return s.track === track;
});
if (alreadyExists) {
throw new DOMException('Track already exists.',
'InvalidAccessError');
}
pc._streams = pc._streams || {};
pc._reverseStreams = pc._reverseStreams || {};
var oldStream = pc._streams[stream.id];
if (oldStream) {
// this is using odd Chrome behaviour, use with caution:
// https://bugs.chromium.org/p/webrtc/issues/detail?id=7815
// Note: we rely on the high-level addTrack/dtmf shim to
// create the sender with a dtmf sender.
oldStream.addTrack(track);
// Trigger ONN async.
Promise.resolve().then(function() {
pc.dispatchEvent(new Event('negotiationneeded'));
});
} else {
var newStream = new window.MediaStream([track]);
pc._streams[stream.id] = newStream;
pc._reverseStreams[newStream.id] = stream;
pc.addStream(newStream);
}
return pc.getSenders().find(function(s) {
return s.track === track;
});
};
// replace the internal stream id with the external one and
// vice versa.
function replaceInternalStreamId(pc, description) {
var sdp = description.sdp;
Object.keys(pc._reverseStreams || []).forEach(function(internalId) {
var externalStream = pc._reverseStreams[internalId];
var internalStream = pc._streams[externalStream.id];
sdp = sdp.replace(new RegExp(internalStream.id, 'g'),
externalStream.id);
});
return new RTCSessionDescription({
type: description.type,
sdp: sdp
});
}
function replaceExternalStreamId(pc, description) {
var sdp = description.sdp;
Object.keys(pc._reverseStreams || []).forEach(function(internalId) {
var externalStream = pc._reverseStreams[internalId];
var internalStream = pc._streams[externalStream.id];
sdp = sdp.replace(new RegExp(externalStream.id, 'g'),
internalStream.id);
});
return new RTCSessionDescription({
type: description.type,
sdp: sdp
});
}
['createOffer', 'createAnswer'].forEach(function(method) {
var nativeMethod = window.RTCPeerConnection.prototype[method];
window.RTCPeerConnection.prototype[method] = function() {
var pc = this;
var args = arguments;
var isLegacyCall = arguments.length &&
typeof arguments[0] === 'function';
if (isLegacyCall) {
return nativeMethod.apply(pc, [
function(description) {
var desc = replaceInternalStreamId(pc, description);
args[0].apply(null, [desc]);
},
function(err) {
if (args[1]) {
args[1].apply(null, err);
}
}, arguments[2]
]);
}
return nativeMethod.apply(pc, arguments)
.then(function(description) {
return replaceInternalStreamId(pc, description);
});
};
});
var origSetLocalDescription =
window.RTCPeerConnection.prototype.setLocalDescription;
window.RTCPeerConnection.prototype.setLocalDescription = function() {
var pc = this;
if (!arguments.length || !arguments[0].type) {
return origSetLocalDescription.apply(pc, arguments);
}
arguments[0] = replaceExternalStreamId(pc, arguments[0]);
return origSetLocalDescription.apply(pc, arguments);
};
// TODO: mangle getStats: https://w3c.github.io/webrtc-stats/#dom-rtcmediastreamstats-streamidentifier
var origLocalDescription = Object.getOwnPropertyDescriptor(
window.RTCPeerConnection.prototype, 'localDescription');
Object.defineProperty(window.RTCPeerConnection.prototype,
'localDescription', {
get: function() {
var pc = this;
var description = origLocalDescription.get.apply(this);
if (description.type === '') {
return description;
}
return replaceInternalStreamId(pc, description);
}
});
window.RTCPeerConnection.prototype.removeTrack = function(sender) {
var pc = this;
if (pc.signalingState === 'closed') {
throw new DOMException(
'The RTCPeerConnection\'s signalingState is \'closed\'.',
'InvalidStateError');
}
// We can not yet check for sender instanceof RTCRtpSender
// since we shim RTPSender. So we check if sender._pc is set.
if (!sender._pc) {
throw new DOMException('Argument 1 of RTCPeerConnection.removeTrack ' +
'does not implement interface RTCRtpSender.', 'TypeError');
}
var isLocal = sender._pc === pc;
if (!isLocal) {
throw new DOMException('Sender was not created by this connection.',
'InvalidAccessError');
}
// Search for the native stream the senders track belongs to.
pc._streams = pc._streams || {};
var stream;
Object.keys(pc._streams).forEach(function(streamid) {
var hasTrack = pc._streams[streamid].getTracks().find(function(track) {
return sender.track === track;
});
if (hasTrack) {
stream = pc._streams[streamid];
}
});
if (stream) {
if (stream.getTracks().length === 1) {
// if this is the last track of the stream, remove the stream. This
// takes care of any shimmed _senders.
pc.removeStream(pc._reverseStreams[stream.id]);
} else {
// relying on the same odd chrome behaviour as above.
stream.removeTrack(sender.track);
}
pc.dispatchEvent(new Event('negotiationneeded'));
}
};
},
shimPeerConnection: function(window) {
var browserDetails = utils.detectBrowser(window);
// The RTCPeerConnection object.
if (!window.RTCPeerConnection && window.webkitRTCPeerConnection) {
window.RTCPeerConnection = function(pcConfig, pcConstraints) {
// Translate iceTransportPolicy to iceTransports,
// see https://code.google.com/p/webrtc/issues/detail?id=4869
// this was fixed in M56 along with unprefixing RTCPeerConnection.
logging('PeerConnection');
if (pcConfig && pcConfig.iceTransportPolicy) {
pcConfig.iceTransports = pcConfig.iceTransportPolicy;
}
return new window.webkitRTCPeerConnection(pcConfig, pcConstraints);
};
window.RTCPeerConnection.prototype =
window.webkitRTCPeerConnection.prototype;
// wrap static methods. Currently just generateCertificate.
if (window.webkitRTCPeerConnection.generateCertificate) {
Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {
get: function() {
return window.webkitRTCPeerConnection.generateCertificate;
}
});
}
}
var origGetStats = window.RTCPeerConnection.prototype.getStats;
window.RTCPeerConnection.prototype.getStats = function(selector,
successCallback, errorCallback) {
var pc = this;
var args = arguments;
// If selector is a function then we are in the old style stats so just
// pass back the original getStats format to avoid breaking old users.
if (arguments.length > 0 && typeof selector === 'function') {
return origGetStats.apply(this, arguments);
}
// When spec-style getStats is supported, return those when called with
// either no arguments or the selector argument is null.
if (origGetStats.length === 0 && (arguments.length === 0 ||
typeof arguments[0] !== 'function')) {
return origGetStats.apply(this, []);
}
var fixChromeStats_ = function(response) {
var standardReport = {};
var reports = response.result();
reports.forEach(function(report) {
var standardStats = {
id: report.id,
timestamp: report.timestamp,
type: {
localcandidate: 'local-candidate',
remotecandidate: 'remote-candidate'
}[report.type] || report.type
};
report.names().forEach(function(name) {
standardStats[name] = report.stat(name);
});
standardReport[standardStats.id] = standardStats;
});
return standardReport;
};
// shim getStats with maplike support
var makeMapStats = function(stats) {
return new Map(Object.keys(stats).map(function(key) {
return [key, stats[key]];
}));
};
if (arguments.length >= 2) {
var successCallbackWrapper_ = function(response) {
args[1](makeMapStats(fixChromeStats_(response)));
};
return origGetStats.apply(this, [successCallbackWrapper_,
arguments[0]]);
}
// promise-support
return new Promise(function(resolve, reject) {
origGetStats.apply(pc, [
function(response) {
resolve(makeMapStats(fixChromeStats_(response)));
}, reject]);
}).then(successCallback, errorCallback);
};
// add promise support -- natively available in Chrome 51
if (browserDetails.version < 51) {
['setLocalDescription', 'setRemoteDescription', 'addIceCandidate']
.forEach(function(method) {
var nativeMethod = window.RTCPeerConnection.prototype[method];
window.RTCPeerConnection.prototype[method] = function() {
var args = arguments;
var pc = this;
var promise = new Promise(function(resolve, reject) {
nativeMethod.apply(pc, [args[0], resolve, reject]);
});
if (args.length < 2) {
return promise;
}
return promise.then(function() {
args[1].apply(null, []);
},
function(err) {
if (args.length >= 3) {
args[2].apply(null, [err]);
}
});
};
});
}
// promise support for createOffer and createAnswer. Available (without
// bugs) since M52: crbug/619289
if (browserDetails.version < 52) {
['createOffer', 'createAnswer'].forEach(function(method) {
var nativeMethod = window.RTCPeerConnection.prototype[method];
window.RTCPeerConnection.prototype[method] = function() {
var pc = this;
if (arguments.length < 1 || (arguments.length === 1 &&
typeof arguments[0] === 'object')) {
var opts = arguments.length === 1 ? arguments[0] : undefined;
return new Promise(function(resolve, reject) {
nativeMethod.apply(pc, [resolve, reject, opts]);
});
}
return nativeMethod.apply(this, arguments);
};
});
}
// shim implicit creation of RTCSessionDescription/RTCIceCandidate
['setLocalDescription', 'setRemoteDescription', 'addIceCandidate']
.forEach(function(method) {
var nativeMethod = window.RTCPeerConnection.prototype[method];
window.RTCPeerConnection.prototype[method] = function() {
arguments[0] = new ((method === 'addIceCandidate') ?
window.RTCIceCandidate :
window.RTCSessionDescription)(arguments[0]);
return nativeMethod.apply(this, arguments);
};
});
// support for addIceCandidate(null or undefined)
var nativeAddIceCandidate =
window.RTCPeerConnection.prototype.addIceCandidate;
window.RTCPeerConnection.prototype.addIceCandidate = function() {
if (!arguments[0]) {
if (arguments[1]) {
arguments[1].apply(null);
}
return Promise.resolve();
}
return nativeAddIceCandidate.apply(this, arguments);
};
},
fixNegotiationNeeded: function(window) {
utils.wrapPeerConnectionEvent(window, 'negotiationneeded', function(e) {
var pc = e.target;
if (pc.signalingState !== 'stable') {
return;
}
return e;
});
},
shimGetDisplayMedia: function(window, getSourceId) {
if ('getDisplayMedia' in window.navigator) {
return;
}
// getSourceId is a function that returns a promise resolving with
// the sourceId of the screen/window/tab to be shared.
if (typeof getSourceId !== 'function') {
console.error('shimGetDisplayMedia: getSourceId argument is not ' +
'a function');
return;
}
navigator.getDisplayMedia = function(constraints) {
return getSourceId(constraints)
.then(function(sourceId) {
constraints.video = {
mandatory: {
chromeMediaSource: 'desktop',
chromeMediaSourceId: sourceId,
maxFrameRate: constraints.video.frameRate || 3
}
};
return navigator.mediaDevices.getUserMedia(constraints);
});
};
}
};
},{"../utils.js":14,"./getusermedia":6}],6:[function(require,module,exports){
/*
* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree.
*/
/* eslint-env node */
'use strict';
var utils = require('../utils.js');
var logging = utils.log;
// Expose public methods.
module.exports = function(window) {
var browserDetails = utils.detectBrowser(window);
var navigator = window && window.navigator;
var constraintsToChrome_ = function(c) {
if (typeof c !== 'object' || c.mandatory || c.optional) {
return c;
}
var cc = {};
Object.keys(c).forEach(function(key) {
if (key === 'require' || key === 'advanced' || key === 'mediaSource') {
return;
}
var r = (typeof c[key] === 'object') ? c[key] : {ideal: c[key]};
if (r.exact !== undefined && typeof r.exact === 'number') {
r.min = r.max = r.exact;
}
var oldname_ = function(prefix, name) {
if (prefix) {
return prefix + name.charAt(0).toUpperCase() + name.slice(1);
}
return (name === 'deviceId') ? 'sourceId' : name;
};
if (r.ideal !== undefined) {
cc.optional = cc.optional || [];
var oc = {};
if (typeof r.ideal === 'number') {
oc[oldname_('min', key)] = r.ideal;
cc.optional.push(oc);
oc = {};
oc[oldname_('max', key)] = r.ideal;
cc.optional.push(oc);
} else {
oc[oldname_('', key)] = r.ideal;
cc.optional.push(oc);
}
}
if (r.exact !== undefined && typeof r.exact !== 'number') {
cc.mandatory = cc.mandatory || {};
cc.mandatory[oldname_('', key)] = r.exact;
} else {
['min', 'max'].forEach(function(mix) {
if (r[mix] !== undefined) {
cc.mandatory = cc.mandatory || {};
cc.mandatory[oldname_(mix, key)] = r[mix];
}
});
}
});
if (c.advanced) {
cc.optional = (cc.optional || []).concat(c.advanced);
}
return cc;
};
var shimConstraints_ = function(constraints, func) {
if (browserDetails.version >= 61) {
return func(constraints);
}
constraints = JSON.parse(JSON.stringify(constraints));
if (constraints && typeof constraints.audio === 'object') {
var remap = function(obj, a, b) {
if (a in obj && !(b in obj)) {
obj[b] = obj[a];
delete obj[a];
}
};
constraints = JSON.parse(JSON.stringify(constraints));
remap(constraints.audio, 'autoGainControl', 'googAutoGainControl');
remap(constraints.audio, 'noiseSuppression', 'googNoiseSuppression');
constraints.audio = constraintsToChrome_(constraints.audio);
}
if (constraints && typeof constraints.video === 'object') {
// Shim facingMode for mobile & surface pro.
var face = constraints.video.facingMode;
face = face && ((typeof face === 'object') ? face : {ideal: face});
var getSupportedFacingModeLies = browserDetails.version < 66;
if ((face && (face.exact === 'user' || face.exact === 'environment' ||
face.ideal === 'user' || face.ideal === 'environment')) &&
!(navigator.mediaDevices.getSupportedConstraints &&
navigator.mediaDevices.getSupportedConstraints().facingMode &&
!getSupportedFacingModeLies)) {
delete constraints.video.facingMode;
var matches;
if (face.exact === 'environment' || face.ideal === 'environment') {
matches = ['back', 'rear'];
} else if (face.exact === 'user' || face.ideal === 'user') {
matches = ['front'];
}
if (matches) {
// Look for matches in label, or use last cam for back (typical).
return navigator.mediaDevices.enumerateDevices()
.then(function(devices) {
devices = devices.filter(function(d) {
return d.kind === 'videoinput';
});
var dev = devices.find(function(d) {
return matches.some(function(match) {
return d.label.toLowerCase().indexOf(match) !== -1;
});
});
if (!dev && devices.length && matches.indexOf('back') !== -1) {
dev = devices[devices.length - 1]; // more likely the back cam
}
if (dev) {
constraints.video.deviceId = face.exact ? {exact: dev.deviceId} :
{ideal: dev.deviceId};
}
constraints.video = constraintsToChrome_(constraints.video);
logging('chrome: ' + JSON.stringify(constraints));
return func(constraints);
});
}
}
constraints.video = constraintsToChrome_(constraints.video);
}
logging('chrome: ' + JSON.stringify(constraints));
return func(constraints);
};
var shimError_ = function(e) {
if (browserDetails.version >= 64) {
return e;
}
return {
name: {
PermissionDeniedError: 'NotAllowedError',
PermissionDismissedError: 'NotAllowedError',
InvalidStateError: 'NotAllowedError',
DevicesNotFoundError: 'NotFoundError',
ConstraintNotSatisfiedError: 'OverconstrainedError',
TrackStartError: 'NotReadableError',
MediaDeviceFailedDueToShutdown: 'NotAllowedError',
MediaDeviceKillSwitchOn: 'NotAllowedError',
TabCaptureError: 'AbortError',
ScreenCaptureError: 'AbortError',
DeviceCaptureError: 'AbortError'
}[e.name] || e.name,
message: e.message,
constraint: e.constraint || e.constraintName,
toString: function() {
return this.name + (this.message && ': ') + this.message;
}
};
};
var getUserMedia_ = function(constraints, onSuccess, onError) {
shimConstraints_(constraints, function(c) {
navigator.webkitGetUserMedia(c, onSuccess, function(e) {
if (onError) {
onError(shimError_(e));
}
});
});
};
navigator.getUserMedia = getUserMedia_;
// Returns the result of getUserMedia as a Promise.
var getUserMediaPromise_ = function(constraints) {
return new Promise(function(resolve, reject) {
navigator.getUserMedia(constraints, resolve, reject);
});
};
if (!navigator.mediaDevices) {
navigator.mediaDevices = {
getUserMedia: getUserMediaPromise_,
enumerateDevices: function() {
return new Promise(function(resolve) {
var kinds = {audio: 'audioinput', video: 'videoinput'};
return window.MediaStreamTrack.getSources(function(devices) {
resolve(devices.map(function(device) {
return {label: device.label,
kind: kinds[device.kind],
deviceId: device.id,
groupId: ''};
}));
});
});
},
getSupportedConstraints: function() {
return {
deviceId: true, echoCancellation: true, facingMode: true,
frameRate: true, height: true, width: true
};
}
};
}
// A shim for getUserMedia method on the mediaDevices object.
// TODO(KaptenJansson) remove once implemented in Chrome stable.
if (!navigator.mediaDevices.getUserMedia) {
navigator.mediaDevices.getUserMedia = function(constraints) {
return getUserMediaPromise_(constraints);
};
} else {
// Even though Chrome 45 has navigator.mediaDevices and a getUserMedia
// function which returns a Promise, it does not accept spec-style
// constraints.
var origGetUserMedia = navigator.mediaDevices.getUserMedia.
bind(navigator.mediaDevices);
navigator.mediaDevices.getUserMedia = function(cs) {
return shimConstraints_(cs, function(c) {
return origGetUserMedia(c).then(function(stream) {
if (c.audio && !stream.getAudioTracks().length ||
c.video && !stream.getVideoTracks().length) {
stream.getTracks().forEach(function(track) {
track.stop();
});
throw new DOMException('', 'NotFoundError');
}
return stream;
}, function(e) {
return Promise.reject(shimError_(e));
});
});
};
}
// Dummy devicechange event methods.
// TODO(KaptenJansson) remove once implemented in Chrome stable.
if (typeof navigator.mediaDevices.addEventListener === 'undefined') {
navigator.mediaDevices.addEventListener = function() {
logging('Dummy mediaDevices.addEventListener called.');
};
}
if (typeof navigator.mediaDevices.removeEventListener === 'undefined') {
navigator.mediaDevices.removeEventListener = function() {
logging('Dummy mediaDevices.removeEventListener called.');
};
}
};
},{"../utils.js":14}],7:[function(require,module,exports){
/*
* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree.
*/
/* eslint-env node */
'use strict';
var SDPUtils = require('sdp');
var utils = require('./utils');
module.exports = {
shimRTCIceCandidate: function(window) {
// foundation is arbitrarily chosen as an indicator for full support for
// https://w3c.github.io/webrtc-pc/#rtcicecandidate-interface
if (!window.RTCIceCandidate || (window.RTCIceCandidate && 'foundation' in
window.RTCIceCandidate.prototype)) {
return;
}
var NativeRTCIceCandidate = window.RTCIceCandidate;
window.RTCIceCandidate = function(args) {
// Remove the a= which shouldn't be part of the candidate string.
if (typeof args === 'object' && args.candidate &&
args.candidate.indexOf('a=') === 0) {
args = JSON.parse(JSON.stringify(args));
args.candidate = args.candidate.substr(2);
}
if (args.candidate && args.candidate.length) {
// Augment the native candidate with the parsed fields.
var nativeCandidate = new NativeRTCIceCandidate(args);
var parsedCandidate = SDPUtils.parseCandidate(args.candidate);
var augmentedCandidate = Object.assign(nativeCandidate,
parsedCandidate);
// Add a serializer that does not serialize the extra attributes.
augmentedCandidate.toJSON = function() {
return {
candidate: augmentedCandidate.candidate,
sdpMid: augmentedCandidate.sdpMid,
sdpMLineIndex: augmentedCandidate.sdpMLineIndex,
usernameFragment: augmentedCandidate.usernameFragment,
};
};
return augmentedCandidate;
}
return new NativeRTCIceCandidate(args);
};
window.RTCIceCandidate.prototype = NativeRTCIceCandidate.prototype;
// Hook up the augmented candidate in onicecandidate and
// addEventListener('icecandidate', ...)
utils.wrapPeerConnectionEvent(window, 'icecandidate', function(e) {
if (e.candidate) {
Object.defineProperty(e, 'candidate', {
value: new window.RTCIceCandidate(e.candidate),
writable: 'false'
});
}
return e;
});
},
// shimCreateObjectURL must be called before shimSourceObject to avoid loop.
shimCreateObjectURL: function(window) {
var URL = window && window.URL;
if (!(typeof window === 'object' && window.HTMLMediaElement &&
'srcObject' in window.HTMLMediaElement.prototype &&
URL.createObjectURL && URL.revokeObjectURL)) {
// Only shim CreateObjectURL using srcObject if srcObject exists.
return undefined;
}
var nativeCreateObjectURL = URL.createObjectURL.bind(URL);
var nativeRevokeObjectURL = URL.revokeObjectURL.bind(URL);
var streams = new Map(), newId = 0;
URL.createObjectURL = function(stream) {
if ('getTracks' in stream) {
var url = 'polyblob:' + (++newId);
streams.set(url, stream);
utils.deprecated('URL.createObjectURL(stream)',
'elem.srcObject = stream');
return url;
}
return nativeCreateObjectURL(stream);
};
URL.revokeObjectURL = function(url) {
nativeRevokeObjectURL(url);
streams.delete(url);
};
var dsc = Object.getOwnPropertyDescriptor(window.HTMLMediaElement.prototype,
'src');
Object.defineProperty(window.HTMLMediaElement.prototype, 'src', {
get: function() {
return dsc.get.apply(this);
},
set: function(url) {
this.srcObject = streams.get(url) || null;
return dsc.set.apply(this, [url]);
}
});
var nativeSetAttribute = window.HTMLMediaElement.prototype.setAttribute;
window.HTMLMediaElement.prototype.setAttribute = function() {
if (arguments.length === 2 &&
('' + arguments[0]).toLowerCase() === 'src') {
this.srcObject = streams.get(arguments[1]) || null;
}
return nativeSetAttribute.apply(this, arguments);
};
},
shimMaxMessageSize: function(window) {
if (window.RTCSctpTransport || !window.RTCPeerConnection) {
return;
}
var browserDetails = utils.detectBrowser(window);
if (!('sctp' in window.RTCPeerConnection.prototype)) {
Object.defineProperty(window.RTCPeerConnection.prototype, 'sctp', {
get: function() {
return typeof this._sctp === 'undefined' ? null : this._sctp;
}
});
}
var sctpInDescription = function(description) {
var sections = SDPUtils.splitSections(description.sdp);
sections.shift();
return sections.some(function(mediaSection) {
var mLine = SDPUtils.parseMLine(mediaSection);
return mLine && mLine.kind === 'application'
&& mLine.protocol.indexOf('SCTP') !== -1;
});
};
var getRemoteFirefoxVersion = function(description) {
// TODO: Is there a better solution for detecting Firefox?
var match = description.sdp.match(/mozilla...THIS_IS_SDPARTA-(\d+)/);
if (match === null || match.length < 2) {
return -1;
}
var version = parseInt(match[1], 10);
// Test for NaN (yes, this is ugly)
return version !== version ? -1 : version;
};
var getCanSendMaxMessageSize = function(remoteIsFirefox) {
// Every implementation we know can send at least 64 KiB.
// Note: Although Chrome is technically able to send up to 256 KiB, the
// data does not reach the other peer reliably.
// See: https://bugs.chromium.org/p/webrtc/issues/detail?id=8419
var canSendMaxMessageSize = 65536;
if (browserDetails.browser === 'firefox') {
if (browserDetails.version < 57) {
if (remoteIsFirefox === -1) {
// FF < 57 will send in 16 KiB chunks using the deprecated PPID
// fragmentation.
canSendMaxMessageSize = 16384;
} else {
// However, other FF (and RAWRTC) can reassemble PPID-fragmented
// messages. Thus, supporting ~2 GiB when sending.
canSendMaxMessageSize = 2147483637;
}
} else if (browserDetails.version < 60) {
// Currently, all FF >= 57 will reset the remote maximum message size
// to the default value when a data channel is created at a later
// stage. :(
// See: https://bugzilla.mozilla.org/show_bug.cgi?id=1426831
canSendMaxMessageSize =
browserDetails.version === 57 ? 65535 : 65536;
} else {
// FF >= 60 supports sending ~2 GiB
canSendMaxMessageSize = 2147483637;
}
}
return canSendMaxMessageSize;
};
var getMaxMessageSize = function(description, remoteIsFirefox) {
// Note: 65536 bytes is the default value from the SDP spec. Also,
// every implementation we know supports receiving 65536 bytes.
var maxMessageSize = 65536;
// FF 57 has a slightly incorrect default remote max message size, so
// we need to adjust it here to avoid a failure when sending.
// See: https://bugzilla.mozilla.org/show_bug.cgi?id=1425697
if (browserDetails.browser === 'firefox'
&& browserDetails.version === 57) {
maxMessageSize = 65535;
}
var match = SDPUtils.matchPrefix(description.sdp, 'a=max-message-size:');
if (match.length > 0) {
maxMessageSize = parseInt(match[0].substr(19), 10);
} else if (browserDetails.browser === 'firefox' &&
remoteIsFirefox !== -1) {
// If the maximum message size is not present in the remote SDP and
// both local and remote are Firefox, the remote peer can receive
// ~2 GiB.
maxMessageSize = 2147483637;
}
return maxMessageSize;
};
var origSetRemoteDescription =
window.RTCPeerConnection.prototype.setRemoteDescription;
window.RTCPeerConnection.prototype.setRemoteDescription = function() {
var pc = this;
pc._sctp = null;
if (sctpInDescription(arguments[0])) {
// Check if the remote is FF.
var isFirefox = getRemoteFirefoxVersion(arguments[0]);
// Get the maximum message size the local peer is capable of sending
var canSendMMS = getCanSendMaxMessageSize(isFirefox);
// Get the maximum message size of the remote peer.
var remoteMMS = getMaxMessageSize(arguments[0], isFirefox);
// Determine final maximum message size
var maxMessageSize;
if (canSendMMS === 0 && remoteMMS === 0) {
maxMessageSize = Number.POSITIVE_INFINITY;
} else if (canSendMMS === 0 || remoteMMS === 0) {
maxMessageSize = Math.max(canSendMMS, remoteMMS);
} else {
maxMessageSize = Math.min(canSendMMS, remoteMMS);
}
// Create a dummy RTCSctpTransport object and the 'maxMessageSize'
// attribute.
var sctp = {};
Object.defineProperty(sctp, 'maxMessageSize', {
get: function() {
return maxMessageSize;
}
});
pc._sctp = sctp;
}
return origSetRemoteDescription.apply(pc, arguments);
};
},
shimSendThrowTypeError: function(window) {
if (!(window.RTCPeerConnection &&
'createDataChannel' in window.RTCPeerConnection.prototype)) {
return;
}
// Note: Although Firefox >= 57 has a native implementation, the maximum
// message size can be reset for all data channels at a later stage.
// See: https://bugzilla.mozilla.org/show_bug.cgi?id=1426831
function wrapDcSend(dc, pc) {
var origDataChannelSend = dc.send;
dc.send = function() {
var data = arguments[0];
var length = data.length || data.size || data.byteLength;
if (dc.readyState === 'open' &&
pc.sctp && length > pc.sctp.maxMessageSize) {
throw new TypeError('Message too large (can send a maximum of ' +
pc.sctp.maxMessageSize + ' bytes)');
}
return origDataChannelSend.apply(dc, arguments);
};
}
var origCreateDataChannel =
window.RTCPeerConnection.prototype.createDataChannel;
window.RTCPeerConnection.prototype.createDataChannel = function() {
var pc = this;
var dataChannel = origCreateDataChannel.apply(pc, arguments);
wrapDcSend(dataChannel, pc);
return dataChannel;
};
utils.wrapPeerConnectionEvent(window, 'datachannel', function(e) {
wrapDcSend(e.channel, e.target);
return e;
});
}
};
},{"./utils":14,"sdp":2}],8:[function(require,module,exports){
/*
* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree.
*/
/* eslint-env node */
'use strict';
var utils = require('../utils');
var filterIceServers = require('./filtericeservers');
var shimRTCPeerConnection = require('rtcpeerconnection-shim');
module.exports = {
shimGetUserMedia: require('./getusermedia'),
shimPeerConnection: function(window) {
var browserDetails = utils.detectBrowser(window);
if (window.RTCIceGatherer) {
if (!window.RTCIceCandidate) {
window.RTCIceCandidate = function(args) {
return args;
};
}
if (!window.RTCSessionDescription) {
window.RTCSessionDescription = function(args) {
return args;
};
}
// this adds an additional event listener to MediaStrackTrack that signals
// when a tracks enabled property was changed. Workaround for a bug in
// addStream, see below. No longer required in 15025+
if (browserDetails.version < 15025) {
var origMSTEnabled = Object.getOwnPropertyDescriptor(
window.MediaStreamTrack.prototype, 'enabled');
Object.defineProperty(window.MediaStreamTrack.prototype, 'enabled', {
set: function(value) {
origMSTEnabled.set.call(this, value);
var ev = new Event('enabled');
ev.enabled = value;
this.dispatchEvent(ev);
}
});
}
}
// ORTC defines the DTMF sender a bit different.
// https://github.com/w3c/ortc/issues/714
if (window.RTCRtpSender && !('dtmf' in window.RTCRtpSender.prototype)) {
Object.defineProperty(window.RTCRtpSender.prototype, 'dtmf', {
get: function() {
if (this._dtmf === undefined) {
if (this.track.kind === 'audio') {
this._dtmf = new window.RTCDtmfSender(this);
} else if (this.track.kind === 'video') {
this._dtmf = null;
}
}
return this._dtmf;
}
});
}
// Edge currently only implements the RTCDtmfSender, not the
// RTCDTMFSender alias. See http://draft.ortc.org/#rtcdtmfsender2*
if (window.RTCDtmfSender && !window.RTCDTMFSender) {
window.RTCDTMFSender = window.RTCDtmfSender;
}
var RTCPeerConnectionShim = shimRTCPeerConnection(window,
browserDetails.version);
window.RTCPeerConnection = function(config) {
if (config && config.iceServers) {
config.iceServers = filterIceServers(config.iceServers);
}
return new RTCPeerConnectionShim(config);
};
window.RTCPeerConnection.prototype = RTCPeerConnectionShim.prototype;
},
shimReplaceTrack: function(window) {
// ORTC has replaceTrack -- https://github.com/w3c/ortc/issues/614
if (window.RTCRtpSender &&
!('replaceTrack' in window.RTCRtpSender.prototype)) {
window.RTCRtpSender.prototype.replaceTrack =
window.RTCRtpSender.prototype.setTrack;
}
}
};
},{"../utils":14,"./filtericeservers":9,"./getusermedia":10,"rtcpeerconnection-shim":1}],9:[function(require,module,exports){
/*
* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree.
*/
/* eslint-env node */
'use strict';
var utils = require('../utils');
// Edge does not like
// 1) stun: filtered after 14393 unless ?transport=udp is present
// 2) turn: that does not have all of turn:host:port?transport=udp
// 3) turn: with ipv6 addresses
// 4) turn: occurring muliple times
module.exports = function(iceServers, edgeVersion) {
var hasTurn = false;
iceServers = JSON.parse(JSON.stringify(iceServers));
return iceServers.filter(function(server) {
if (server && (server.urls || server.url)) {
var urls = server.urls || server.url;
if (server.url && !server.urls) {
utils.deprecated('RTCIceServer.url', 'RTCIceServer.urls');
}
var isString = typeof urls === 'string';
if (isString) {
urls = [urls];
}
urls = urls.filter(function(url) {
var validTurn = url.indexOf('turn:') === 0 &&
url.indexOf('transport=udp') !== -1 &&
url.indexOf('turn:[') === -1 &&
!hasTurn;
if (validTurn) {
hasTurn = true;
return true;
}
return url.indexOf('stun:') === 0 && edgeVersion >= 14393 &&
url.indexOf('?transport=udp') === -1;
});
delete server.url;
server.urls = isString ? urls[0] : urls;
return !!urls.length;
}
});
};
},{"../utils":14}],10:[function(require,module,exports){
/*
* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree.
*/
/* eslint-env node */
'use strict';
// Expose public methods.
module.exports = function(window) {
var navigator = window && window.navigator;
var shimError_ = function(e) {
return {
name: {PermissionDeniedError: 'NotAllowedError'}[e.name] || e.name,
message: e.message,
constraint: e.constraint,
toString: function() {
return this.name;
}
};
};
// getUserMedia error shim.
var origGetUserMedia = navigator.mediaDevices.getUserMedia.
bind(navigator.mediaDevices);
navigator.mediaDevices.getUserMedia = function(c) {
return origGetUserMedia(c).catch(function(e) {
return Promise.reject(shimError_(e));
});
};
};
},{}],11:[function(require,module,exports){
/*
* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree.
*/
/* eslint-env node */
'use strict';
var utils = require('../utils');
module.exports = {
shimGetUserMedia: require('./getusermedia'),
shimOnTrack: function(window) {
if (typeof window === 'object' && window.RTCPeerConnection && !('ontrack' in
window.RTCPeerConnection.prototype)) {
Object.defineProperty(window.RTCPeerConnection.prototype, 'ontrack', {
get: function() {
return this._ontrack;
},
set: function(f) {
if (this._ontrack) {
this.removeEventListener('track', this._ontrack);
this.removeEventListener('addstream', this._ontrackpoly);
}
this.addEventListener('track', this._ontrack = f);
this.addEventListener('addstream', this._ontrackpoly = function(e) {
e.stream.getTracks().forEach(function(track) {
var event = new Event('track');
event.track = track;
event.receiver = {track: track};
event.transceiver = {receiver: event.receiver};
event.streams = [e.stream];
this.dispatchEvent(event);
}.bind(this));
}.bind(this));
},
enumerable: true,
configurable: true
});
}
if (typeof window === 'object' && window.RTCTrackEvent &&
('receiver' in window.RTCTrackEvent.prototype) &&
!('transceiver' in window.RTCTrackEvent.prototype)) {
Object.defineProperty(window.RTCTrackEvent.prototype, 'transceiver', {
get: function() {
return {receiver: this.receiver};
}
});
}
},
shimSourceObject: function(window) {
// Firefox has supported mozSrcObject since FF22, unprefixed in 42.
if (typeof window === 'object') {
if (window.HTMLMediaElement &&
!('srcObject' in window.HTMLMediaElement.prototype)) {
// Shim the srcObject property, once, when HTMLMediaElement is found.
Object.defineProperty(window.HTMLMediaElement.prototype, 'srcObject', {
get: function() {
return this.mozSrcObject;
},
set: function(stream) {
this.mozSrcObject = stream;
}
});
}
}
},
shimPeerConnection: function(window) {
var browserDetails = utils.detectBrowser(window);
if (typeof window !== 'object' || !(window.RTCPeerConnection ||
window.mozRTCPeerConnection)) {
return; // probably media.peerconnection.enabled=false in about:config
}
// The RTCPeerConnection object.
if (!window.RTCPeerConnection) {
window.RTCPeerConnection = function(pcConfig, pcConstraints) {
if (browserDetails.version < 38) {
// .urls is not supported in FF < 38.
// create RTCIceServers with a single url.
if (pcConfig && pcConfig.iceServers) {
var newIceServers = [];
for (var i = 0; i < pcConfig.iceServers.length; i++) {
var server = pcConfig.iceServers[i];
if (server.hasOwnProperty('urls')) {
for (var j = 0; j < server.urls.length; j++) {
var newServer = {
url: server.urls[j]
};
if (server.urls[j].indexOf('turn') === 0) {
newServer.username = server.username;
newServer.credential = server.credential;
}
newIceServers.push(newServer);
}
} else {
newIceServers.push(pcConfig.iceServers[i]);
}
}
pcConfig.iceServers = newIceServers;
}
}
return new window.mozRTCPeerConnection(pcConfig, pcConstraints);
};
window.RTCPeerConnection.prototype =
window.mozRTCPeerConnection.prototype;
// wrap static methods. Currently just generateCertificate.
if (window.mozRTCPeerConnection.generateCertificate) {
Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {
get: function() {
return window.mozRTCPeerConnection.generateCertificate;
}
});
}
window.RTCSessionDescription = window.mozRTCSessionDescription;
window.RTCIceCandidate = window.mozRTCIceCandidate;
}
// shim away need for obsolete RTCIceCandidate/RTCSessionDescription.
['setLocalDescription', 'setRemoteDescription', 'addIceCandidate']
.forEach(function(method) {
var nativeMethod = window.RTCPeerConnection.prototype[method];
window.RTCPeerConnection.prototype[method] = function() {
arguments[0] = new ((method === 'addIceCandidate') ?
window.RTCIceCandidate :
window.RTCSessionDescription)(arguments[0]);
return nativeMethod.apply(this, arguments);
};
});
// support for addIceCandidate(null or undefined)
var nativeAddIceCandidate =
window.RTCPeerConnection.prototype.addIceCandidate;
window.RTCPeerConnection.prototype.addIceCandidate = function() {
if (!arguments[0]) {
if (arguments[1]) {
arguments[1].apply(null);
}
return Promise.resolve();
}
return nativeAddIceCandidate.apply(this, arguments);
};
// shim getStats with maplike support
var makeMapStats = function(stats) {
var map = new Map();
Object.keys(stats).forEach(function(key) {
map.set(key, stats[key]);
map[key] = stats[key];
});
return map;
};
var modernStatsTypes = {
inboundrtp: 'inbound-rtp',
outboundrtp: 'outbound-rtp',
candidatepair: 'candidate-pair',
localcandidate: 'local-candidate',
remotecandidate: 'remote-candidate'
};
var nativeGetStats = window.RTCPeerConnection.prototype.getStats;
window.RTCPeerConnection.prototype.getStats = function(
selector,
onSucc,
onErr
) {
return nativeGetStats.apply(this, [selector || null])
.then(function(stats) {
if (browserDetails.version < 48) {
stats = makeMapStats(stats);
}
if (browserDetails.version < 53 && !onSucc) {
// Shim only promise getStats with spec-hyphens in type names
// Leave callback version alone; misc old uses of forEach before Map
try {
stats.forEach(function(stat) {
stat.type = modernStatsTypes[stat.type] || stat.type;
});
} catch (e) {
if (e.name !== 'TypeError') {
throw e;
}
// Avoid TypeError: "type" is read-only, in old versions. 34-43ish
stats.forEach(function(stat, i) {
stats.set(i, Object.assign({}, stat, {
type: modernStatsTypes[stat.type] || stat.type
}));
});
}
}
return stats;
})
.then(onSucc, onErr);
};
},
shimSenderGetStats: function(window) {
if (!(typeof window === 'object' && window.RTCPeerConnection &&
window.RTCRtpSender)) {
return;
}
if (window.RTCRtpSender && 'getStats' in window.RTCRtpSender.prototype) {
return;
}
var origGetSenders = window.RTCPeerConnection.prototype.getSenders;
if (origGetSenders) {
window.RTCPeerConnection.prototype.getSenders = function() {
var pc = this;
var senders = origGetSenders.apply(pc, []);
senders.forEach(function(sender) {
sender._pc = pc;
});
return senders;
};
}
var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
if (origAddTrack) {
window.RTCPeerConnection.prototype.addTrack = function() {
var sender = origAddTrack.apply(this, arguments);
sender._pc = this;
return sender;
};
}
window.RTCRtpSender.prototype.getStats = function() {
return this.track ? this._pc.getStats(this.track) :
Promise.resolve(new Map());
};
},
shimReceiverGetStats: function(window) {
if (!(typeof window === 'object' && window.RTCPeerConnection &&
window.RTCRtpSender)) {
return;
}
if (window.RTCRtpSender && 'getStats' in window.RTCRtpReceiver.prototype) {
return;
}
var origGetReceivers = window.RTCPeerConnection.prototype.getReceivers;
if (origGetReceivers) {
window.RTCPeerConnection.prototype.getReceivers = function() {
var pc = this;
var receivers = origGetReceivers.apply(pc, []);
receivers.forEach(function(receiver) {
receiver._pc = pc;
});
return receivers;
};
}
utils.wrapPeerConnectionEvent(window, 'track', function(e) {
e.receiver._pc = e.srcElement;
return e;
});
window.RTCRtpReceiver.prototype.getStats = function() {
return this._pc.getStats(this.track);
};
},
shimRemoveStream: function(window) {
if (!window.RTCPeerConnection ||
'removeStream' in window.RTCPeerConnection.prototype) {
return;
}
window.RTCPeerConnection.prototype.removeStream = function(stream) {
var pc = this;
utils.deprecated('removeStream', 'removeTrack');
this.getSenders().forEach(function(sender) {
if (sender.track && stream.getTracks().indexOf(sender.track) !== -1) {
pc.removeTrack(sender);
}
});
};
},
shimRTCDataChannel: function(window) {
// rename DataChannel to RTCDataChannel (native fix in FF60):
// https://bugzilla.mozilla.org/show_bug.cgi?id=1173851
if (window.DataChannel && !window.RTCDataChannel) {
window.RTCDataChannel = window.DataChannel;
}
},
shimGetDisplayMedia: function(window, preferredMediaSource) {
if ('getDisplayMedia' in window.navigator) {
return;
}
navigator.getDisplayMedia = function(constraints) {
if (!(constraints && constraints.video)) {
var err = new DOMException('getDisplayMedia without video ' +
'constraints is undefined');
err.name = 'NotFoundError';
// from https://heycam.github.io/webidl/#idl-DOMException-error-names
err.code = 8;
return Promise.reject(err);
}
if (constraints.video === true) {
constraints.video = {mediaSource: preferredMediaSource};
} else {
constraints.video.mediaSource = preferredMediaSource;
}
return navigator.mediaDevices.getUserMedia(constraints);
};
}
};
},{"../utils":14,"./getusermedia":12}],12:[function(require,module,exports){
/*
* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree.
*/
/* eslint-env node */
'use strict';
var utils = require('../utils');
var logging = utils.log;
// Expose public methods.
module.exports = function(window) {
var browserDetails = utils.detectBrowser(window);
var navigator = window && window.navigator;
var MediaStreamTrack = window && window.MediaStreamTrack;
var shimError_ = function(e) {
return {
name: {
InternalError: 'NotReadableError',
NotSupportedError: 'TypeError',
PermissionDeniedError: 'NotAllowedError',
SecurityError: 'NotAllowedError'
}[e.name] || e.name,
message: {
'The operation is insecure.': 'The request is not allowed by the ' +
'user agent or the platform in the current context.'
}[e.message] || e.message,
constraint: e.constraint,
toString: function() {
return this.name + (this.message && ': ') + this.message;
}
};
};
// getUserMedia constraints shim.
var getUserMedia_ = function(constraints, onSuccess, onError) {
var constraintsToFF37_ = function(c) {
if (typeof c !== 'object' || c.require) {
return c;
}
var require = [];
Object.keys(c).forEach(function(key) {
if (key === 'require' || key === 'advanced' || key === 'mediaSource') {
return;
}
var r = c[key] = (typeof c[key] === 'object') ?
c[key] : {ideal: c[key]};
if (r.min !== undefined ||
r.max !== undefined || r.exact !== undefined) {
require.push(key);
}
if (r.exact !== undefined) {
if (typeof r.exact === 'number') {
r. min = r.max = r.exact;
} else {
c[key] = r.exact;
}
delete r.exact;
}
if (r.ideal !== undefined) {
c.advanced = c.advanced || [];
var oc = {};
if (typeof r.ideal === 'number') {
oc[key] = {min: r.ideal, max: r.ideal};
} else {
oc[key] = r.ideal;
}
c.advanced.push(oc);
delete r.ideal;
if (!Object.keys(r).length) {
delete c[key];
}
}
});
if (require.length) {
c.require = require;
}
return c;
};
constraints = JSON.parse(JSON.stringify(constraints));
if (browserDetails.version < 38) {
logging('spec: ' + JSON.stringify(constraints));
if (constraints.audio) {
constraints.audio = constraintsToFF37_(constraints.audio);
}
if (constraints.video) {
constraints.video = constraintsToFF37_(constraints.video);
}
logging('ff37: ' + JSON.stringify(constraints));
}
return navigator.mozGetUserMedia(constraints, onSuccess, function(e) {
onError(shimError_(e));
});
};
// Returns the result of getUserMedia as a Promise.
var getUserMediaPromise_ = function(constraints) {
return new Promise(function(resolve, reject) {
getUserMedia_(constraints, resolve, reject);
});
};
// Shim for mediaDevices on older versions.
if (!navigator.mediaDevices) {
navigator.mediaDevices = {getUserMedia: getUserMediaPromise_,
addEventListener: function() { },
removeEventListener: function() { }
};
}
navigator.mediaDevices.enumerateDevices =
navigator.mediaDevices.enumerateDevices || function() {
return new Promise(function(resolve) {
var infos = [
{kind: 'audioinput', deviceId: 'default', label: '', groupId: ''},
{kind: 'videoinput', deviceId: 'default', label: '', groupId: ''}
];
resolve(infos);
});
};
if (browserDetails.version < 41) {
// Work around http://bugzil.la/1169665
var orgEnumerateDevices =
navigator.mediaDevices.enumerateDevices.bind(navigator.mediaDevices);
navigator.mediaDevices.enumerateDevices = function() {
return orgEnumerateDevices().then(undefined, function(e) {
if (e.name === 'NotFoundError') {
return [];
}
throw e;
});
};
}
if (browserDetails.version < 49) {
var origGetUserMedia = navigator.mediaDevices.getUserMedia.
bind(navigator.mediaDevices);
navigator.mediaDevices.getUserMedia = function(c) {
return origGetUserMedia(c).then(function(stream) {
// Work around https://bugzil.la/802326
if (c.audio && !stream.getAudioTracks().length ||
c.video && !stream.getVideoTracks().length) {
stream.getTracks().forEach(function(track) {
track.stop();
});
throw new DOMException('The object can not be found here.',
'NotFoundError');
}
return stream;
}, function(e) {
return Promise.reject(shimError_(e));
});
};
}
if (!(browserDetails.version > 55 &&
'autoGainControl' in navigator.mediaDevices.getSupportedConstraints())) {
var remap = function(obj, a, b) {
if (a in obj && !(b in obj)) {
obj[b] = obj[a];
delete obj[a];
}
};
var nativeGetUserMedia = navigator.mediaDevices.getUserMedia.
bind(navigator.mediaDevices);
navigator.mediaDevices.getUserMedia = function(c) {
if (typeof c === 'object' && typeof c.audio === 'object') {
c = JSON.parse(JSON.stringify(c));
remap(c.audio, 'autoGainControl', 'mozAutoGainControl');
remap(c.audio, 'noiseSuppression', 'mozNoiseSuppression');
}
return nativeGetUserMedia(c);
};
if (MediaStreamTrack && MediaStreamTrack.prototype.getSettings) {
var nativeGetSettings = MediaStreamTrack.prototype.getSettings;
MediaStreamTrack.prototype.getSettings = function() {
var obj = nativeGetSettings.apply(this, arguments);
remap(obj, 'mozAutoGainControl', 'autoGainControl');
remap(obj, 'mozNoiseSuppression', 'noiseSuppression');
return obj;
};
}
if (MediaStreamTrack && MediaStreamTrack.prototype.applyConstraints) {
var nativeApplyConstraints = MediaStreamTrack.prototype.applyConstraints;
MediaStreamTrack.prototype.applyConstraints = function(c) {
if (this.kind === 'audio' && typeof c === 'object') {
c = JSON.parse(JSON.stringify(c));
remap(c, 'autoGainControl', 'mozAutoGainControl');
remap(c, 'noiseSuppression', 'mozNoiseSuppression');
}
return nativeApplyConstraints.apply(this, [c]);
};
}
}
navigator.getUserMedia = function(constraints, onSuccess, onError) {
if (browserDetails.version < 44) {
return getUserMedia_(constraints, onSuccess, onError);
}
// Replace Firefox 44+'s deprecation warning with unprefixed version.
utils.deprecated('navigator.getUserMedia',
'navigator.mediaDevices.getUserMedia');
navigator.mediaDevices.getUserMedia(constraints).then(onSuccess, onError);
};
};
},{"../utils":14}],13:[function(require,module,exports){
/*
* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree.
*/
'use strict';
var utils = require('../utils');
module.exports = {
shimLocalStreamsAPI: function(window) {
if (typeof window !== 'object' || !window.RTCPeerConnection) {
return;
}
if (!('getLocalStreams' in window.RTCPeerConnection.prototype)) {
window.RTCPeerConnection.prototype.getLocalStreams = function() {
if (!this._localStreams) {
this._localStreams = [];
}
return this._localStreams;
};
}
if (!('getStreamById' in window.RTCPeerConnection.prototype)) {
window.RTCPeerConnection.prototype.getStreamById = function(id) {
var result = null;
if (this._localStreams) {
this._localStreams.forEach(function(stream) {
if (stream.id === id) {
result = stream;
}
});
}
if (this._remoteStreams) {
this._remoteStreams.forEach(function(stream) {
if (stream.id === id) {
result = stream;
}
});
}
return result;
};
}
if (!('addStream' in window.RTCPeerConnection.prototype)) {
var _addTrack = window.RTCPeerConnection.prototype.addTrack;
window.RTCPeerConnection.prototype.addStream = function(stream) {
if (!this._localStreams) {
this._localStreams = [];
}
if (this._localStreams.indexOf(stream) === -1) {
this._localStreams.push(stream);
}
var pc = this;
stream.getTracks().forEach(function(track) {
_addTrack.call(pc, track, stream);
});
};
window.RTCPeerConnection.prototype.addTrack = function(track, stream) {
if (stream) {
if (!this._localStreams) {
this._localStreams = [stream];
} else if (this._localStreams.indexOf(stream) === -1) {
this._localStreams.push(stream);
}
}
return _addTrack.call(this, track, stream);
};
}
if (!('removeStream' in window.RTCPeerConnection.prototype)) {
window.RTCPeerConnection.prototype.removeStream = function(stream) {
if (!this._localStreams) {
this._localStreams = [];
}
var index = this._localStreams.indexOf(stream);
if (index === -1) {
return;
}
this._localStreams.splice(index, 1);
var pc = this;
var tracks = stream.getTracks();
this.getSenders().forEach(function(sender) {
if (tracks.indexOf(sender.track) !== -1) {
pc.removeTrack(sender);
}
});
};
}
},
shimRemoteStreamsAPI: function(window) {
if (typeof window !== 'object' || !window.RTCPeerConnection) {
return;
}
if (!('getRemoteStreams' in window.RTCPeerConnection.prototype)) {
window.RTCPeerConnection.prototype.getRemoteStreams = function() {
return this._remoteStreams ? this._remoteStreams : [];
};
}
if (!('onaddstream' in window.RTCPeerConnection.prototype)) {
Object.defineProperty(window.RTCPeerConnection.prototype, 'onaddstream', {
get: function() {
return this._onaddstream;
},
set: function(f) {
if (this._onaddstream) {
this.removeEventListener('addstream', this._onaddstream);
}
this.addEventListener('addstream', this._onaddstream = f);
}
});
var origSetRemoteDescription =
window.RTCPeerConnection.prototype.setRemoteDescription;
window.RTCPeerConnection.prototype.setRemoteDescription = function() {
var pc = this;
if (!this._onaddstreampoly) {
this.addEventListener('track', this._onaddstreampoly = function(e) {
e.streams.forEach(function(stream) {
if (!pc._remoteStreams) {
pc._remoteStreams = [];
}
if (pc._remoteStreams.indexOf(stream) >= 0) {
return;
}
pc._remoteStreams.push(stream);
var event = new Event('addstream');
event.stream = stream;
pc.dispatchEvent(event);
});
});
}
return origSetRemoteDescription.apply(pc, arguments);
};
}
},
shimCallbacksAPI: function(window) {
if (typeof window !== 'object' || !window.RTCPeerConnection) {
return;
}
var prototype = window.RTCPeerConnection.prototype;
var createOffer = prototype.createOffer;
var createAnswer = prototype.createAnswer;
var setLocalDescription = prototype.setLocalDescription;
var setRemoteDescription = prototype.setRemoteDescription;
var addIceCandidate = prototype.addIceCandidate;
prototype.createOffer = function(successCallback, failureCallback) {
var options = (arguments.length >= 2) ? arguments[2] : arguments[0];
var promise = createOffer.apply(this, [options]);
if (!failureCallback) {
return promise;
}
promise.then(successCallback, failureCallback);
return Promise.resolve();
};
prototype.createAnswer = function(successCallback, failureCallback) {
var options = (arguments.length >= 2) ? arguments[2] : arguments[0];
var promise = createAnswer.apply(this, [options]);
if (!failureCallback) {
return promise;
}
promise.then(successCallback, failureCallback);
return Promise.resolve();
};
var withCallback = function(description, successCallback, failureCallback) {
var promise = setLocalDescription.apply(this, [description]);
if (!failureCallback) {
return promise;
}
promise.then(successCallback, failureCallback);
return Promise.resolve();
};
prototype.setLocalDescription = withCallback;
withCallback = function(description, successCallback, failureCallback) {
var promise = setRemoteDescription.apply(this, [description]);
if (!failureCallback) {
return promise;
}
promise.then(successCallback, failureCallback);
return Promise.resolve();
};
prototype.setRemoteDescription = withCallback;
withCallback = function(candidate, successCallback, failureCallback) {
var promise = addIceCandidate.apply(this, [candidate]);
if (!failureCallback) {
return promise;
}
promise.then(successCallback, failureCallback);
return Promise.resolve();
};
prototype.addIceCandidate = withCallback;
},
shimGetUserMedia: function(window) {
var navigator = window && window.navigator;
if (!navigator.getUserMedia) {
if (navigator.webkitGetUserMedia) {
navigator.getUserMedia = navigator.webkitGetUserMedia.bind(navigator);
} else if (navigator.mediaDevices &&
navigator.mediaDevices.getUserMedia) {
navigator.getUserMedia = function(constraints, cb, errcb) {
navigator.mediaDevices.getUserMedia(constraints)
.then(cb, errcb);
}.bind(navigator);
}
}
},
shimRTCIceServerUrls: function(window) {
// migrate from non-spec RTCIceServer.url to RTCIceServer.urls
var OrigPeerConnection = window.RTCPeerConnection;
window.RTCPeerConnection = function(pcConfig, pcConstraints) {
if (pcConfig && pcConfig.iceServers) {
var newIceServers = [];
for (var i = 0; i < pcConfig.iceServers.length; i++) {
var server = pcConfig.iceServers[i];
if (!server.hasOwnProperty('urls') &&
server.hasOwnProperty('url')) {
utils.deprecated('RTCIceServer.url', 'RTCIceServer.urls');
server = JSON.parse(JSON.stringify(server));
server.urls = server.url;
delete server.url;
newIceServers.push(server);
} else {
newIceServers.push(pcConfig.iceServers[i]);
}
}
pcConfig.iceServers = newIceServers;
}
return new OrigPeerConnection(pcConfig, pcConstraints);
};
window.RTCPeerConnection.prototype = OrigPeerConnection.prototype;
// wrap static methods. Currently just generateCertificate.
if ('generateCertificate' in window.RTCPeerConnection) {
Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {
get: function() {
return OrigPeerConnection.generateCertificate;
}
});
}
},
shimTrackEventTransceiver: function(window) {
// Add event.transceiver member over deprecated event.receiver
if (typeof window === 'object' && window.RTCPeerConnection &&
('receiver' in window.RTCTrackEvent.prototype) &&
// can't check 'transceiver' in window.RTCTrackEvent.prototype, as it is
// defined for some reason even when window.RTCTransceiver is not.
!window.RTCTransceiver) {
Object.defineProperty(window.RTCTrackEvent.prototype, 'transceiver', {
get: function() {
return {receiver: this.receiver};
}
});
}
},
shimCreateOfferLegacy: function(window) {
var origCreateOffer = window.RTCPeerConnection.prototype.createOffer;
window.RTCPeerConnection.prototype.createOffer = function(offerOptions) {
var pc = this;
if (offerOptions) {
if (typeof offerOptions.offerToReceiveAudio !== 'undefined') {
// support bit values
offerOptions.offerToReceiveAudio = !!offerOptions.offerToReceiveAudio;
}
var audioTransceiver = pc.getTransceivers().find(function(transceiver) {
return transceiver.sender.track &&
transceiver.sender.track.kind === 'audio';
});
if (offerOptions.offerToReceiveAudio === false && audioTransceiver) {
if (audioTransceiver.direction === 'sendrecv') {
if (audioTransceiver.setDirection) {
audioTransceiver.setDirection('sendonly');
} else {
audioTransceiver.direction = 'sendonly';
}
} else if (audioTransceiver.direction === 'recvonly') {
if (audioTransceiver.setDirection) {
audioTransceiver.setDirection('inactive');
} else {
audioTransceiver.direction = 'inactive';
}
}
} else if (offerOptions.offerToReceiveAudio === true &&
!audioTransceiver) {
pc.addTransceiver('audio');
}
if (typeof offerOptions.offerToReceiveVideo !== 'undefined') {
// support bit values
offerOptions.offerToReceiveVideo = !!offerOptions.offerToReceiveVideo;
}
var videoTransceiver = pc.getTransceivers().find(function(transceiver) {
return transceiver.sender.track &&
transceiver.sender.track.kind === 'video';
});
if (offerOptions.offerToReceiveVideo === false && videoTransceiver) {
if (videoTransceiver.direction === 'sendrecv') {
videoTransceiver.setDirection('sendonly');
} else if (videoTransceiver.direction === 'recvonly') {
videoTransceiver.setDirection('inactive');
}
} else if (offerOptions.offerToReceiveVideo === true &&
!videoTransceiver) {
pc.addTransceiver('video');
}
}
return origCreateOffer.apply(pc, arguments);
};
}
};
},{"../utils":14}],14:[function(require,module,exports){
/*
* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree.
*/
/* eslint-env node */
'use strict';
var logDisabled_ = true;
var deprecationWarnings_ = true;
/**
* Extract browser version out of the provided user agent string.
*
* @param {!string} uastring userAgent string.
* @param {!string} expr Regular expression used as match criteria.
* @param {!number} pos position in the version string to be returned.
* @return {!number} browser version.
*/
function extractVersion(uastring, expr, pos) {
var match = uastring.match(expr);
return match && match.length >= pos && parseInt(match[pos], 10);
}
// Wraps the peerconnection event eventNameToWrap in a function
// which returns the modified event object (or false to prevent
// the event).
function wrapPeerConnectionEvent(window, eventNameToWrap, wrapper) {
if (!window.RTCPeerConnection) {
return;
}
var proto = window.RTCPeerConnection.prototype;
var nativeAddEventListener = proto.addEventListener;
proto.addEventListener = function(nativeEventName, cb) {
if (nativeEventName !== eventNameToWrap) {
return nativeAddEventListener.apply(this, arguments);
}
var wrappedCallback = function(e) {
var modifiedEvent = wrapper(e);
if (modifiedEvent) {
cb(modifiedEvent);
}
};
this._eventMap = this._eventMap || {};
this._eventMap[cb] = wrappedCallback;
return nativeAddEventListener.apply(this, [nativeEventName,
wrappedCallback]);
};
var nativeRemoveEventListener = proto.removeEventListener;
proto.removeEventListener = function(nativeEventName, cb) {
if (nativeEventName !== eventNameToWrap || !this._eventMap
|| !this._eventMap[cb]) {
return nativeRemoveEventListener.apply(this, arguments);
}
var unwrappedCb = this._eventMap[cb];
delete this._eventMap[cb];
return nativeRemoveEventListener.apply(this, [nativeEventName,
unwrappedCb]);
};
Object.defineProperty(proto, 'on' + eventNameToWrap, {
get: function() {
return this['_on' + eventNameToWrap];
},
set: function(cb) {
if (this['_on' + eventNameToWrap]) {
this.removeEventListener(eventNameToWrap,
this['_on' + eventNameToWrap]);
delete this['_on' + eventNameToWrap];
}
if (cb) {
this.addEventListener(eventNameToWrap,
this['_on' + eventNameToWrap] = cb);
}
},
enumerable: true,
configurable: true
});
}
// Utility methods.
module.exports = {
extractVersion: extractVersion,
wrapPeerConnectionEvent: wrapPeerConnectionEvent,
disableLog: function(bool) {
if (typeof bool !== 'boolean') {
return new Error('Argument type: ' + typeof bool +
'. Please use a boolean.');
}
logDisabled_ = bool;
return (bool) ? 'adapter.js logging disabled' :
'adapter.js logging enabled';
},
/**
* Disable or enable deprecation warnings
* @param {!boolean} bool set to true to disable warnings.
*/
disableWarnings: function(bool) {
if (typeof bool !== 'boolean') {
return new Error('Argument type: ' + typeof bool +
'. Please use a boolean.');
}
deprecationWarnings_ = !bool;
return 'adapter.js deprecation warnings ' + (bool ? 'disabled' : 'enabled');
},
log: function() {
if (typeof window === 'object') {
if (logDisabled_) {
return;
}
if (typeof console !== 'undefined' && typeof console.log === 'function') {
console.log.apply(console, arguments);
}
}
},
/**
* Shows a deprecation warning suggesting the modern and spec-compatible API.
*/
deprecated: function(oldMethod, newMethod) {
if (!deprecationWarnings_) {
return;
}
console.warn(oldMethod + ' is deprecated, please use ' + newMethod +
' instead.');
},
/**
* Browser detector.
*
* @return {object} result containing browser and version
* properties.
*/
detectBrowser: function(window) {
var navigator = window && window.navigator;
// Returned result object.
var result = {};
result.browser = null;
result.version = null;
// Fail early if it's not a browser
if (typeof window === 'undefined' || !window.navigator) {
result.browser = 'Not a browser.';
return result;
}
if (navigator.mozGetUserMedia) { // Firefox.
result.browser = 'firefox';
result.version = extractVersion(navigator.userAgent,
/Firefox\/(\d+)\./, 1);
} else if (navigator.webkitGetUserMedia) {
// Chrome, Chromium, Webview, Opera.
// Version matches Chrome/WebRTC version.
result.browser = 'chrome';
result.version = extractVersion(navigator.userAgent,
/Chrom(e|ium)\/(\d+)\./, 2);
} else if (navigator.mediaDevices &&
navigator.userAgent.match(/Edge\/(\d+).(\d+)$/)) { // Edge.
result.browser = 'edge';
result.version = extractVersion(navigator.userAgent,
/Edge\/(\d+).(\d+)$/, 2);
} else if (window.RTCPeerConnection &&
navigator.userAgent.match(/AppleWebKit\/(\d+)\./)) { // Safari.
result.browser = 'safari';
result.version = extractVersion(navigator.userAgent,
/AppleWebKit\/(\d+)\./, 1);
} else { // Default fallthrough: not supported.
result.browser = 'Not a supported browser.';
return result;
}
return result;
}
};
},{}]},{},[3])(3)
});