netflux
Version:
Peer to peer isomorphic transport API based on WebRTC and WebSocket. Allows to create/join full mesh network
1,408 lines (1,406 loc) • 272 kB
JavaScript
import { merge, Subject, BehaviorSubject, ReplaySubject } from 'rxjs';
import { filter, map } from 'rxjs/operators';
(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){
},{}],2:[function(require,module,exports){
var SDPUtils = {};
SDPUtils.generateIdentifier = function() {
return Math.random().toString(36).substr(2, 10);
};
SDPUtils.localCName = SDPUtils.generateIdentifier();
SDPUtils.splitLines = function(blob) {
return blob.trim().split('\n').map(function(line) {
return line.trim();
});
};
SDPUtils.splitSections = function(blob) {
var parts = blob.split('\nm=');
return parts.map(function(part, index) {
return (index > 0 ? 'm=' + part : part).trim() + '\r\n';
});
};
SDPUtils.getDescription = function(blob) {
var sections = SDPUtils.splitSections(blob);
return sections && sections[0];
};
SDPUtils.getMediaSections = function(blob) {
var sections = SDPUtils.splitSections(blob);
sections.shift();
return sections;
};
SDPUtils.matchPrefix = function(blob, prefix) {
return SDPUtils.splitLines(blob).filter(function(line) {
return line.indexOf(prefix) === 0;
});
};
SDPUtils.parseCandidate = function(line) {
var parts;
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],
port: parseInt(parts[5], 10),
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];
candidate.usernameFragment = parts[i + 1];
break;
default:
candidate[parts[i]] = parts[i + 1];
break;
}
}
return candidate;
};
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.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(' ');
};
SDPUtils.parseIceOptions = function(line) {
return line.substr(14).split(' ');
};
SDPUtils.parseRtpMap = function(line) {
var parts = line.substr(9).split(' ');
var parsed = {
payloadType: parseInt(parts.shift(), 10)
};
parts = parts[0].split('/');
parsed.name = parts[0];
parsed.clockRate = parseInt(parts[1], 10);
parsed.channels = parts.length === 3 ? parseInt(parts[2], 10) : 1;
parsed.numChannels = parsed.channels;
return parsed;
};
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';
};
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]
};
};
SDPUtils.writeExtmap = function(headerExtension) {
return 'a=extmap:' + (headerExtension.id || headerExtension.preferredId) +
(headerExtension.direction && headerExtension.direction !== 'sendrecv'
? '/' + headerExtension.direction
: '') +
' ' + headerExtension.uri + '\r\n';
};
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;
};
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;
};
SDPUtils.parseRtcpFb = function(line) {
var parts = line.substr(line.indexOf(' ') + 1).split(' ');
return {
type: parts.shift(),
parameter: parts.join(' ')
};
};
SDPUtils.writeRtcpFb = function(codec) {
var lines = '';
var pt = codec.payloadType;
if (codec.preferredPayloadType !== undefined) {
pt = codec.preferredPayloadType;
}
if (codec.rtcpFeedback && codec.rtcpFeedback.length) {
codec.rtcpFeedback.forEach(function(fb) {
lines += 'a=rtcp-fb:' + pt + ' ' + fb.type +
(fb.parameter && fb.parameter.length ? ' ' + fb.parameter : '') +
'\r\n';
});
}
return lines;
};
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);
})
};
};
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(),
value: parts[1]
};
};
SDPUtils.getDtlsParameters = function(mediaSection, sessionpart) {
var lines = SDPUtils.matchPrefix(mediaSection + sessionpart,
'a=fingerprint:');
return {
role: 'auto',
fingerprints: lines.map(SDPUtils.parseFingerprint)
};
};
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;
};
SDPUtils.getIceParameters = function(mediaSection, sessionpart) {
var lines = SDPUtils.splitLines(mediaSection);
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;
};
SDPUtils.writeIceParameters = function(params) {
return 'a=ice-ufrag:' + params.usernameFragment + '\r\n' +
'a=ice-pwd:' + params.password + '\r\n';
};
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++) {
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 + ' ');
codec.parameters = fmtps.length ? SDPUtils.parseFmtp(fmtps[0]) : {};
codec.rtcpFeedback = SDPUtils.matchPrefix(
mediaSection, 'a=rtcp-fb:' + pt + ' ')
.map(SDPUtils.parseRtcpFb);
description.codecs.push(codec);
switch (codec.name.toUpperCase()) {
case 'RED':
case 'ULPFEC':
description.fecMechanisms.push(codec.name.toUpperCase());
break;
default:
break;
}
}
}
SDPUtils.matchPrefix(mediaSection, 'a=extmap:').forEach(function(line) {
description.headerExtensions.push(SDPUtils.parseExtmap(line));
});
return description;
};
SDPUtils.writeRtpDescription = function(kind, caps) {
var sdp = '';
sdp += 'm=' + kind + ' ';
sdp += caps.codecs.length > 0 ? '9' : '0';
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';
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);
});
}
return sdp;
};
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;
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: secondarySsrc,
mechanism: hasUlpfec ? 'red+ulpfec' : 'red'
};
encodingParameters.push(encParam);
}
}
});
if (encodingParameters.length === 0 && primarySsrc) {
encodingParameters.push({
ssrc: primarySsrc
});
}
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) {
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;
};
SDPUtils.parseRtcpParameters = function(mediaSection) {
var rtcpParameters = {};
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;
}
var rsize = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-rsize');
rtcpParameters.reducedSize = rsize.length > 0;
rtcpParameters.compound = rsize.length === 0;
var mux = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-mux');
rtcpParameters.mux = mux.length > 0;
return rtcpParameters;
};
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]};
}
};
SDPUtils.generateSessionId = function() {
return Math.random().toString().substr(2, 21);
};
SDPUtils.writeSessionBoilerplate = function(sessId, sessVer) {
var sessionId;
var version = sessVer !== undefined ? sessVer : 2;
if (sessId) {
sessionId = sessId;
} else {
sessionId = SDPUtils.generateSessionId();
}
return 'v=0\r\n' +
'o=thisisadapterortc ' + 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);
sdp += SDPUtils.writeIceParameters(
transceiver.iceGatherer.getLocalParameters());
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) {
var msid = 'msid:' + stream.id + ' ' +
transceiver.rtpSender.track.id + '\r\n';
sdp += 'a=' + msid;
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';
}
}
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;
};
SDPUtils.getDirection = function(mediaSection, sessionpart) {
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:
}
}
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]
};
};
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;
}
}
return true;
};
if (typeof module === 'object') {
module.exports = SDPUtils;
}
},{}],3:[function(require,module,exports){
(function (global){
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){
var utils = require('./utils');
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];
}
}
var logging = utils.log;
var browserDetails = utils.detectBrowser(window);
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;
var adapter = {
browserDetails: browserDetails,
commonShim: commonShim,
extractVersion: utils.extractVersion,
disableLog: utils.disableLog,
disableWarnings: utils.disableWarnings
};
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.');
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.');
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.');
adapter.browserShim = edgeShim;
commonShim.shimCreateObjectURL(window);
edgeShim.shimGetUserMedia(window);
edgeShim.shimPeerConnection(window);
edgeShim.shimReplaceTrack(window);
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.');
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":1,"./firefox/firefox_shim":8,"./safari/safari_shim":10,"./utils":11}],5:[function(require,module,exports){
var utils = require('../utils.js');
var logging = utils.log;
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);
});
}
});
}
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) {
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 if (!('RTCRtpTransceiver' in window)) {
utils.wrapPeerConnectionEvent(window, 'track', function(e) {
if (!e.transceiver) {
e.transceiver = {receiver: e.receiver};
}
return e;
});
}
},
shimGetSendersWithDtmf: function(window) {
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
};
};
if (!window.RTCPeerConnection.prototype.getSenders) {
window.RTCPeerConnection.prototype.getSenders = function() {
this._senders = this._senders || [];
return this._senders.slice();
};
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);
}
});
};
} 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;
}
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) {
return filterStats(result, sender.track, true);
});
};
}
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;
}
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)) {
Object.defineProperty(window.HTMLMediaElement.prototype, 'srcObject', {
get: function() {
return this._srcObject;
},
set: function(stream) {
var self = this;
this._srcObject = stream;
if (this.src) {
URL.revokeObjectURL(this.src);
}
if (!stream) {
this.src = '';
return undefined;
}
this.src = URL.createObjectURL(stream);
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) {
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);
if (window.RTCPeerConnection.prototype.addTrack &&
browserDetails.version >= 65) {
return this.shimAddTrackRemoveTrackWithNative(window);
}
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');
}
});
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;
})) {
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) {
oldStream.addTrack(track);
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;
});
};
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);
};
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');
}
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');
}
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) {
pc.removeStream(pc._reverseStreams[stream.id]);
} else {
stream.removeTrack(sender.track);
}
pc.dispatchEvent(new Event('negotiationneeded'));
}
};
},
shimPeerConnection: function(window) {
var browserDetails = utils.detectBrowser(window);
if (!window.RTCPeerConnection && window.webkitRTCPeerConnection) {
window.RTCPeerConnection = function(pcConfig, pcConstraints) {
logging('PeerConnection');
if (pcConfig && pcConfig.iceTransportPolicy) {
pcConfig.iceTransports = pcConfig.iceTransportPolicy;
}
return new window.webkitRTCPeerConnection(pcConfig, pcConstraints);
};
window.RTCPeerConnection.prototype =
window.webkitRTCPeerConnection.prototype;
if (window.webkitRTCPeerConnection.generateCertificate) {
Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {
get: function() {
return window.webkitRTCPeerConnection.generateCertificate;
}
});
}
} else {
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;
newIceServers.push(server);
} else {
newIceServers.push(pcConfig.iceServers[i]);
}
}
pcConfig.iceServers = newIceServers;
}
return new OrigPeerConnection(pcConfig, pcConstraints);
};
window.RTCPeerConnection.prototype = OrigPeerConnection.prototype;
Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {
get: function() {
return OrigPeerConnection.generateCertificate;
}
});
}
var origGetStats = window.RTCPeerConnection.prototype.getStats;
window.RTCPeerConnection.prototype.getStats = function(selector,
successCallback, errorCallback) {
var pc = this;
var args = arguments;
if (arguments.length > 0 && typeof selector === 'function') {
return origGetStats.apply(this, arguments);
}
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;
};
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]]);
}
return new Promise(function(resolve, reject) {
origGetStats.apply(pc, [
function(response) {
resolve(makeMapStats(fixChromeStats_(response)));
}, reject]);
}).then(successCallback, errorCallback);
};
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]);
}
});