From fa9b0728839c01e8c10920c25eaffad722325cdd Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Javier=20Cervi=C3=B1o?= Date: Wed, 18 Oct 2017 12:19:05 +0200 Subject: [PATCH] Update AdapterJS to version 5.0.6 (#1057) --- erizo_controller/erizoClient/lib/adapter.js | 5992 +++++++++-------- .../erizoClient/src/Connection.js | 4 +- 2 files changed, 3318 insertions(+), 2678 deletions(-) diff --git a/erizo_controller/erizoClient/lib/adapter.js b/erizo_controller/erizoClient/lib/adapter.js index 5b32e894af..a9dd735455 100644 --- a/erizo_controller/erizoClient/lib/adapter.js +++ b/erizo_controller/erizoClient/lib/adapter.js @@ -1,2949 +1,3573 @@ (function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.adapter = f()}})(function(){var define,module,exports;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 0 ? 'm=' + part : part).trim() + '\r\n'; - }); -}; + // Map DTLS parameters to SDP. + sdp += SDPUtils.writeDtlsParameters( + transceiver.dtlsTransport.getLocalParameters(), + type === 'offer' ? 'actpass' : dtlsRole || 'active'); -// 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; - }); -}; + sdp += 'a=mid:' + transceiver.mid + '\r\n'; -// 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(' '); + 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 { - parts = line.substring(10).split(' '); + sdp += 'a=inactive\r\n'; } - 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), - // skip parts[6] == 'typ' - type: parts[7] - }; + if (transceiver.rtpSender) { + // spec. + var msid = 'msid:' + stream.id + ' ' + + transceiver.rtpSender.track.id + '\r\n'; + sdp += 'a=' + msid; - 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; - default: // extension handling, in particular ufrag - candidate[parts[i]] = parts[i + 1]; - break; + // 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'; } } - 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.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); // was: relAddr - sdp.push('rport'); - sdp.push(candidate.relatedPort); // was: relPort - } - if (candidate.tcpType && candidate.protocol.toLowerCase() === 'tcp') { - sdp.push('tcptype'); - sdp.push(candidate.tcpType); - } - if (candidate.ufrag) { - sdp.push('ufrag'); - sdp.push(candidate.ufrag); + // 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 '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(' '); + return sdp; } -// 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 - }; +// 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; - parts = parts[0].split('/'); + if (validTurn) { + hasTurn = true; + return true; + } + return url.indexOf('stun:') === 0 && edgeVersion >= 14393 && + url.indexOf('?transport=udp') === -1; + }); - parsed.name = parts[0]; - parsed.clockRate = parseInt(parts[1], 10); // was: clockrate - // was: channels - parsed.numChannels = parts.length === 3 ? parseInt(parts[2], 10) : 1; - return parsed; -}; + delete server.url; + server.urls = isString ? urls[0] : urls; + return !!urls.length; + } + return false; + }); +} -// Generate an a=rtpmap line from RTCRtpCodecCapability or -// RTCRtpCodecParameters. -SDPUtils.writeRtpMap = function(codec) { - var pt = codec.payloadType; - if (codec.preferredPayloadType !== undefined) { - pt = codec.preferredPayloadType; - } - return 'a=rtpmap:' + pt + ' ' + codec.name + '/' + codec.clockRate + - (codec.numChannels !== 1 ? '/' + codec.numChannels : '') + '\r\n'; -}; +// Determines the intersection of local and remote capabilities. +function getCommonCapabilities(localCapabilities, remoteCapabilities) { + var commonCapabilities = { + codecs: [], + headerExtensions: [], + fecMechanisms: [] + }; -// 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] + 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]; + } + } }; -}; -// 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'; -}; + 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(); + }; -// 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; -}; + 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); -// 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) { - params.push(param + '=' + codec.parameters[param]); - }); - line += 'a=fmtp:' + pt + ' ' + params.join(';') + '\r\n'; - } - return line; -}; + // 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; + } + } + }); -// 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; -}; + 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; + } + } + }); -// 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; -}; + // FIXME: fecMechanisms + return commonCapabilities; +} -// 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); +// 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; } -SDPUtils.parseFingerprint = function(line) { - var parts = line.substr(14).split(' '); - return { - algorithm: parts[0].toLowerCase(), // algorithm is case-sensitive in Edge. - value: parts[1] +module.exports = function(window, edgeVersion) { + var RTCPeerConnection = function(config) { + var self = this; + + var _eventTarget = document.createDocumentFragment(); + ['addEventListener', 'removeEventListener', 'dispatchEvent'] + .forEach(function(method) { + self[method] = _eventTarget[method].bind(_eventTarget); + }); + + this.onicecandidate = null; + this.onaddstream = null; + this.ontrack = null; + this.onremovestream = null; + this.onsignalingstatechange = null; + this.oniceconnectionstatechange = null; + this.onicegatheringstatechange = null; + this.onnegotiationneeded = null; + this.ondatachannel = null; + this.canTrickleIceCandidates = null; + + this.needNegotiation = false; + + this.localStreams = []; + this.remoteStreams = []; + + this.localDescription = null; + this.remoteDescription = null; + + this.signalingState = 'stable'; + this.iceConnectionState = 'new'; + this.iceGatheringState = 'new'; + + config = JSON.parse(JSON.stringify(config || {})); + + this.usingBundle = config.bundlePolicy === 'max-bundle'; + if (config.rtcpMuxPolicy === 'negotiate') { + var e = new Error('rtcpMuxPolicy \'negotiate\' is not supported'); + e.name = 'NotSupportedError'; + throw(e); + } 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 = 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. }; -}; -// 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) + RTCPeerConnection.prototype._emitGatheringStateChange = function() { + var event = new Event('icegatheringstatechange'); + this.dispatchEvent(event); + if (typeof this.onicegatheringstatechange === 'function') { + this.onicegatheringstatechange(event); + } }; -}; -// 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) + RTCPeerConnection.prototype.getConfiguration = function() { + return this._config; }; - 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'; -}; + RTCPeerConnection.prototype.getLocalStreams = function() { + return this.localStreams; + }; -// Parses the SDP media section and returns RTCRtpParameters. -SDPUtils.parseRtpParameters = function(mediaSection) { - var description = { - codecs: [], - headerExtensions: [], - fecMechanisms: [], - rtcp: [] + RTCPeerConnection.prototype.getRemoteStreams = function() { + return this.remoteStreams; }; - 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: 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 = ''; + // internal helper to create a transceiver object. + // (whih is not yet the same as the WebRTC 1.0 transceiver) + RTCPeerConnection.prototype._createTransceiver = function(kind) { + 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, + 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; + } + this.transceivers.push(transceiver); + return transceiver; + }; - // 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; + RTCPeerConnection.prototype.addTrack = function(track, stream) { + 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); } - 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'; + this._maybeFireNegotiationNeeded(); - // 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 (this.localStreams.indexOf(stream) === -1) { + this.localStreams.push(stream); } - }); - if (maxptime > 0) { - sdp += 'a=maxptime:' + maxptime + '\r\n'; - } - sdp += 'a=rtcp-mux\r\n'; - caps.headerExtensions.forEach(function(extension) { - sdp += SDPUtils.writeExtmap(extension); - }); - // FIXME: write fecMechanisms. - return sdp; -}; + transceiver.track = track; + transceiver.stream = stream; + transceiver.rtpSender = new window.RTCRtpSender(track, + transceiver.dtlsTransport); + return transceiver.rtpSender; + }; -// 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; + RTCPeerConnection.prototype.addStream = function(stream) { + var self = this; + if (edgeVersion >= 15025) { + stream.getTracks().forEach(function(track) { + self.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) { + self.addTrack(track, clonedStream); + }); + } + }; - // 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; + RTCPeerConnection.prototype.removeStream = function(stream) { + var idx = this.localStreams.indexOf(stream); + if (idx > -1) { + this.localStreams.splice(idx, 1); + this._maybeFireNegotiationNeeded(); + } + }; - var flows = SDPUtils.matchPrefix(mediaSection, 'a=ssrc-group:FID') - .map(function(line) { - var parts = line.split(' '); - parts.shift(); - return parts.map(function(part) { - return parseInt(part, 10); + RTCPeerConnection.prototype.getSenders = function() { + return this.transceivers.filter(function(transceiver) { + return !!transceiver.rtpSender; + }) + .map(function(transceiver) { + return transceiver.rtpSender; }); - }); - 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), - 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 + RTCPeerConnection.prototype.getReceivers = function() { + return this.transceivers.filter(function(transceiver) { + return !!transceiver.rtpReceiver; + }) + .map(function(transceiver) { + return transceiver.rtpReceiver; }); - } + }; - // 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; + + RTCPeerConnection.prototype._createIceGatherer = function(sdpMLineIndex, + usingBundle) { + var self = this; + if (usingBundle && sdpMLineIndex > 0) { + return this.transceivers[0].iceGatherer; + } else if (this._iceGatherers.length) { + return this._iceGatherers.shift(); } - encodingParameters.forEach(function(params) { - params.maxBitrate = bandwidth; + var iceGatherer = new window.RTCIceGatherer({ + iceServers: this._config.iceServers, + gatherPolicy: this._config.iceTransportPolicy }); - } - return encodingParameters; -}; + Object.defineProperty(iceGatherer, 'state', + {value: 'new', writable: true} + ); -// parses http://draft.ortc.org/#rtcrtcpparameters* -SDPUtils.parseRtcpParameters = function(mediaSection) { - var rtcpParameters = {}; + this.transceivers[sdpMLineIndex].candidates = []; + 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 (self.transceivers[sdpMLineIndex].candidates !== null) { + self.transceivers[sdpMLineIndex].candidates.push(event.candidate); + } + }; + iceGatherer.addEventListener('localcandidate', + this.transceivers[sdpMLineIndex].bufferCandidates); + return iceGatherer; + }; - var cname; - // Gets the first SSRC. Note that 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; - } + // start gathering from an RTCIceGatherer. + RTCPeerConnection.prototype._gather = function(mid, sdpMLineIndex) { + var self = this; + var iceGatherer = this.transceivers[sdpMLineIndex].iceGatherer; + if (iceGatherer.onlocalcandidate) { + return; + } + var candidates = this.transceivers[sdpMLineIndex].candidates; + this.transceivers[sdpMLineIndex].candidates = null; + iceGatherer.removeEventListener('localcandidate', + this.transceivers[sdpMLineIndex].bufferCandidates); + iceGatherer.onlocalcandidate = function(evt) { + if (self.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}; - // 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(parts) { - return parts.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); -}; + 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; + event.candidate.candidate = SDPUtils.writeCandidate(cand); + } -// Write boilder plate for start of SDP -// sessId argument is optional - if not supplied it will -// be generated randomly -SDPUtils.writeSessionBoilerplate = function(sessId) { - var sessionId; - if (sessId) { - sessionId = sessId; - } else { - sessionId = SDPUtils.generateSessionId(); - } - // FIXME: sess-id should be an NTP timestamp. - return 'v=0\r\n' + - 'o=thisisadapterortc ' + sessionId + ' 2 IN IP4 127.0.0.1\r\n' + - 's=-\r\n' + - 't=0 0\r\n'; -}; + // update local description. + var sections = SDPUtils.splitSections(self.localDescription.sdp); + if (!end) { + sections[event.candidate.sdpMLineIndex + 1] += + 'a=' + event.candidate.candidate + '\r\n'; + } else { + sections[event.candidate.sdpMLineIndex + 1] += + 'a=end-of-candidates\r\n'; + } + self.localDescription.sdp = sections.join(''); + var complete = self.transceivers.every(function(transceiver) { + return transceiver.iceGatherer && + transceiver.iceGatherer.state === 'completed'; + }); -SDPUtils.writeMediaSection = function(transceiver, caps, type, stream) { - var sdp = SDPUtils.writeRtpDescription(transceiver.kind, caps); + if (self.iceGatheringState !== 'gathering') { + self.iceGatheringState = 'gathering'; + self._emitGatheringStateChange(); + } - // Map ICE parameters (ufrag, pwd) to SDP. - sdp += SDPUtils.writeIceParameters( - transceiver.iceGatherer.getLocalParameters()); + // Emit candidate. Also emit null candidate when all gatherers are + // complete. + if (!end) { + self.dispatchEvent(event); + if (typeof self.onicecandidate === 'function') { + self.onicecandidate(event); + } + } + if (complete) { + self.dispatchEvent(new Event('icecandidate')); + if (typeof self.onicecandidate === 'function') { + self.onicecandidate(new Event('icecandidate')); + } + self.iceGatheringState = 'complete'; + self._emitGatheringStateChange(); + } + }; - // Map DTLS parameters to SDP. - sdp += SDPUtils.writeDtlsParameters( - transceiver.dtlsTransport.getLocalParameters(), - type === 'offer' ? 'actpass' : 'active'); + // emit already gathered candidates. + window.setTimeout(function() { + candidates.forEach(function(candidate) { + var e = new Event('RTCIceGatherEvent'); + e.candidate = candidate; + iceGatherer.onlocalcandidate(e); + }); + }, 0); + }; - sdp += 'a=mid:' + transceiver.mid + '\r\n'; + // Create ICE transport and DTLS transport. + RTCPeerConnection.prototype._createIceAndDtlsTransports = function() { + var self = this; + var iceTransport = new window.RTCIceTransport(null); + iceTransport.onicestatechange = function() { + self._updateConnectionState(); + }; - 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'; - } + var dtlsTransport = new window.RTCDtlsTransport(iceTransport); + dtlsTransport.ondtlsstatechange = function() { + self._updateConnectionState(); + }; + dtlsTransport.onerror = function() { + // onerror does not set state to failed by itself. + Object.defineProperty(dtlsTransport, 'state', + {value: 'failed', writable: true}); + self._updateConnectionState(); + }; - if (transceiver.rtpSender) { - // spec. - var msid = 'msid:' + stream.id + ' ' + - transceiver.rtpSender.track.id + '\r\n'; - sdp += 'a=' + msid; + return { + iceTransport: iceTransport, + dtlsTransport: dtlsTransport + }; + }; - // 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'; + // 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; } - } - // 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; -}; + 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; + } + }; -// 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? + // 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 (sessionpart) { - return SDPUtils.getDirection(sessionpart); - } - return 'sendrecv'; -}; + 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; + }); + } + params.encodings = transceiver.recvEncodingParameters; + params.rtcp = { + cname: transceiver.rtcpParameters.cname, + compound: transceiver.rtcpParameters.compound + }; + if (transceiver.sendEncodingParameters.length) { + params.rtcp.ssrc = transceiver.sendEncodingParameters[0].ssrc; + } + transceiver.rtpReceiver.receive(params); + } + }; -SDPUtils.getKind = function(mediaSection) { - var lines = SDPUtils.splitLines(mediaSection); - var mline = lines[0].split(' '); - return mline[0].substr(2); -}; + RTCPeerConnection.prototype.setLocalDescription = function(description) { + var self = this; + var args = arguments; -SDPUtils.isRejected = function(mediaSection) { - return mediaSection.split(' ', 2)[1] === '0'; -}; + if (!isActionAllowedInSignalingState('setLocalDescription', + description.type, this.signalingState)) { + return new Promise(function(resolve, reject) { + var e = new Error('Can not set local ' + description.type + + ' in state ' + self.signalingState); + e.name = 'InvalidStateError'; + if (args.length > 2 && typeof args[2] === 'function') { + args[2].apply(null, [e]); + } + reject(e); + }); + } -// Expose public methods. -module.exports = SDPUtils; + 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); + self.transceivers[sdpMLineIndex].localCapabilities = caps; + }); -},{}],2:[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 */ + this.transceivers.forEach(function(transceiver, sdpMLineIndex) { + self._gather(transceiver.mid, sdpMLineIndex); + }); + } else if (description.type === 'answer') { + sections = SDPUtils.splitSections(self.remoteDescription.sdp); + sessionpart = sections.shift(); + var isIceLite = SDPUtils.matchPrefix(sessionpart, + 'a=ice-lite').length > 0; + sections.forEach(function(mediaSection, sdpMLineIndex) { + var transceiver = self.transceivers[sdpMLineIndex]; + var iceGatherer = transceiver.iceGatherer; + var iceTransport = transceiver.iceTransport; + var dtlsTransport = transceiver.dtlsTransport; + var localCapabilities = transceiver.localCapabilities; + var remoteCapabilities = transceiver.remoteCapabilities; -'use strict'; + // treat bundle-only as not-rejected. + var rejected = SDPUtils.isRejected(mediaSection) && + !SDPUtils.matchPrefix(mediaSection, 'a=bundle-only').length === 1; -var adapterFactory = require('./adapter_factory.js'); -module.exports = adapterFactory({window: global.window}); + if (!rejected && !transceiver.isDatachannel) { + var remoteIceParameters = SDPUtils.getIceParameters( + mediaSection, sessionpart); + var remoteDtlsParameters = SDPUtils.getDtlsParameters( + mediaSection, sessionpart); + if (isIceLite) { + remoteDtlsParameters.role = 'server'; + } -}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) -},{"./adapter_factory.js":3}],3:[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 */ + if (!self.usingBundle || sdpMLineIndex === 0) { + self._gather(transceiver.mid, sdpMLineIndex); + if (iceTransport.state === 'new') { + iceTransport.start(iceGatherer, remoteIceParameters, + isIceLite ? 'controlling' : 'controlled'); + } + if (dtlsTransport.state === 'new') { + dtlsTransport.start(remoteDtlsParameters); + } + } -'use strict'; + // Calculate intersection of capabilities. + var params = getCommonCapabilities(localCapabilities, + remoteCapabilities); -// Shimming starts here. -module.exports = function(dependencies) { - var window = dependencies && dependencies.window; + // Start the RTCRtpSender. The RTCRtpReceiver for this + // transceiver has already been started in setRemoteDescription. + self._transceive(transceiver, + params.codecs.length > 0, + false); + } + }); + } - // Utils. - var utils = require('./utils'); - var logging = utils.log; - var browserDetails = utils.detectBrowser(window); + this.localDescription = { + type: description.type, + sdp: description.sdp + }; + switch (description.type) { + case 'offer': + this._updateSignalingState('have-local-offer'); + break; + case 'answer': + this._updateSignalingState('stable'); + break; + default: + throw new TypeError('unsupported type "' + description.type + + '"'); + } - // Export to the adapter global object visible in the browser. - var adapter = { - browserDetails: browserDetails, - extractVersion: utils.extractVersion, - disableLog: utils.disableLog, - disableWarnings: utils.disableWarnings + // If a success callback was provided, emit ICE candidates after it + // has been executed. Otherwise, emit callback after the Promise is + // resolved. + var cb = arguments.length > 1 && typeof arguments[1] === 'function' && + arguments[1]; + return new Promise(function(resolve) { + if (cb) { + cb.apply(null); + } + resolve(); + }); }; - // 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); + RTCPeerConnection.prototype.setRemoteDescription = function(description) { + var self = this; + var args = arguments; - // 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; + if (!isActionAllowedInSignalingState('setRemoteDescription', + description.type, this.signalingState)) { + return new Promise(function(resolve, reject) { + var e = new Error('Can not set remote ' + description.type + + ' in state ' + self.signalingState); + e.name = 'InvalidStateError'; + if (args.length > 2 && typeof args[2] === 'function') { + args[2].apply(null, [e]); + } + reject(e); + }); + } - // Shim browser if found. - switch (browserDetails.browser) { - case 'chrome': - if (!chromeShim || !chromeShim.shimPeerConnection) { - 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; + var streams = {}; + this.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; + this.usingBundle = usingBundle; + var iceOptions = SDPUtils.matchPrefix(sessionpart, + 'a=ice-options:')[0]; + if (iceOptions) { + this.canTrickleIceCandidates = iceOptions.substr(14).split(' ') + .indexOf('trickle') >= 0; + } else { + this.canTrickleIceCandidates = false; + } - chromeShim.shimGetUserMedia(window); - chromeShim.shimMediaStream(window); - utils.shimCreateObjectURL(window); - chromeShim.shimSourceObject(window); - chromeShim.shimPeerConnection(window); - chromeShim.shimOnTrack(window); - chromeShim.shimGetSendersWithDtmf(window); - break; - case 'firefox': - if (!firefoxShim || !firefoxShim.shimPeerConnection) { - 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; + 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 === 1; + var protocol = lines[0].substr(2).split(' ')[2]; - firefoxShim.shimGetUserMedia(window); - utils.shimCreateObjectURL(window); - firefoxShim.shimSourceObject(window); - firefoxShim.shimPeerConnection(window); - firefoxShim.shimOnTrack(window); - break; - case 'edge': - if (!edgeShim || !edgeShim.shimPeerConnection) { - 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; + var direction = SDPUtils.getDirection(mediaSection, sessionpart); + var remoteMsid = SDPUtils.parseMsid(mediaSection); - edgeShim.shimGetUserMedia(window); - utils.shimCreateObjectURL(window); - edgeShim.shimPeerConnection(window); - edgeShim.shimReplaceTrack(window); - break; - case 'safari': - if (!safariShim) { - logging('Safari shim is not included in this adapter release.'); - return adapter; + var mid = SDPUtils.getMid(mediaSection) || SDPUtils.generateIdentifier(); + + // Reject datachannels which are not implemented yet. + if (kind === 'application' && protocol === 'DTLS/SCTP') { + self.transceivers[sdpMLineIndex] = { + mid: mid, + isDatachannel: true + }; + return; } - logging('adapter.js shimming safari.'); - // Export to the adapter global object visible in the browser. - adapter.browserShim = safariShim; - // shim window.URL.createObjectURL Safari (technical preview) - utils.shimCreateObjectURL(window); - safariShim.shimRTCIceServerUrls(window); - safariShim.shimCallbacksAPI(window); - safariShim.shimLocalStreamsAPI(window); - safariShim.shimRemoteStreamsAPI(window); - safariShim.shimGetUserMedia(window); - break; - default: - logging('Unsupported browser!'); - break; - } - return adapter; -}; + var transceiver; + var iceGatherer; + var iceTransport; + var dtlsTransport; + var rtpReceiver; + var sendEncodingParameters; + var recvEncodingParameters; + var localCapabilities; -},{"./chrome/chrome_shim":4,"./edge/edge_shim":6,"./firefox/firefox_shim":9,"./safari/safari_shim":11,"./utils":12}],4:[function(require,module,exports){ + 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); -/* - * 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; + var rtcpParameters = SDPUtils.parseRtcpParameters(mediaSection); -var chromeShim = { - shimMediaStream: function(window) { - window.MediaStream = window.MediaStream || window.webkitMediaStream; - }, + 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; + }); - 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) { - var self = this; - 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) { - // 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 = self.getReceivers().find(function(r) { - return r.track.id === te.track.id; - }); - } else { - receiver = {track: te.track}; - } - - var event = new Event('track'); - event.track = te.track; - event.receiver = receiver; - event.streams = [e.stream]; - self.dispatchEvent(event); - }); - e.stream.getTracks().forEach(function(track) { - var receiver; - if (window.RTCPeerConnection.prototype.getReceivers) { - receiver = self.getReceivers().find(function(r) { - return r.track.id === track.id; - }); - } else { - receiver = {track: track}; - } - var event = new Event('track'); - event.track = track; - event.receiver = receiver; - event.streams = [e.stream]; - this.dispatchEvent(event); - }.bind(this)); - }.bind(this)); + // Check if we can use BUNDLE and dispose transports. + if ((description.type === 'offer' || description.type === 'answer') && + !rejected && usingBundle && sdpMLineIndex > 0 && + self.transceivers[sdpMLineIndex]) { + self._disposeIceAndDtlsTransports(sdpMLineIndex); + self.transceivers[sdpMLineIndex].iceGatherer = + self.transceivers[0].iceGatherer; + self.transceivers[sdpMLineIndex].iceTransport = + self.transceivers[0].iceTransport; + self.transceivers[sdpMLineIndex].dtlsTransport = + self.transceivers[0].dtlsTransport; + if (self.transceivers[sdpMLineIndex].rtpSender) { + self.transceivers[sdpMLineIndex].rtpSender.setTransport( + self.transceivers[0].dtlsTransport); } - }); - } - }, + if (self.transceivers[sdpMLineIndex].rtpReceiver) { + self.transceivers[sdpMLineIndex].rtpReceiver.setTransport( + self.transceivers[0].dtlsTransport); + } + } + if (description.type === 'offer' && !rejected) { + transceiver = self.transceivers[sdpMLineIndex] || + self._createTransceiver(kind); + transceiver.mid = mid; - shimGetSendersWithDtmf: function(window) { - if (typeof window === 'object' && window.RTCPeerConnection && - !('getSenders' in window.RTCPeerConnection.prototype) && - 'createDTMFSender' in window.RTCPeerConnection.prototype) { - window.RTCPeerConnection.prototype.getSenders = function() { - return this._senders || []; - }; - var origAddStream = window.RTCPeerConnection.prototype.addStream; - var origRemoveStream = window.RTCPeerConnection.prototype.removeStream; + if (!transceiver.iceGatherer) { + transceiver.iceGatherer = self._createIceGatherer(sdpMLineIndex, + usingBundle); + } - if (!window.RTCPeerConnection.prototype.addTrack) { - 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'); + 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); + }); } + } - pc._senders = pc._senders || []; - var alreadyExists = pc._senders.find(function(t) { - return t.track === track; - }); - if (alreadyExists) { - throw new DOMException('Track already exists.', - 'InvalidAccessError'); - } + localCapabilities = window.RTCRtpReceiver.getCapabilities(kind); - pc._streams = pc._streams || {}; - var oldStream = pc._streams[stream.id]; - if (oldStream) { - oldStream.addTrack(track); - pc.removeStream(oldStream); - pc.addStream(oldStream); - } else { - var newStream = new window.MediaStream([track]); - pc._streams[stream.id] = newStream; - pc.addStream(newStream); - } + // 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'; + }); + } - var sender = { - track: track, - get dtmf() { - if (this._dtmf === undefined) { - if (track.kind === 'audio') { - this._dtmf = pc.createDTMFSender(track); - } else { - this._dtmf = null; - } + sendEncodingParameters = transceiver.sendEncodingParameters || [{ + ssrc: (2 * sdpMLineIndex + 2) * 1001 + }]; + + 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) { + if (!streams[remoteMsid.stream]) { + streams[remoteMsid.stream] = new window.MediaStream(); + Object.defineProperty(streams[remoteMsid.stream], 'id', { + get: function() { + return remoteMsid.stream; + } + }); } - return this._dtmf; - } - }; - pc._senders.push(sender); - return sender; - }; - } - 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({ - track: track, - get dtmf() { - if (this._dtmf === undefined) { - if (track.kind === 'audio') { - this._dtmf = pc.createDTMFSender(track); - } else { - this._dtmf = null; + Object.defineProperty(track, 'id', { + get: function() { + return remoteMsid.track; } + }); + stream = streams[remoteMsid.stream]; + } else { + if (!streams.default) { + streams.default = new window.MediaStream(); } - return this._dtmf; + stream = streams.default; } - }); - }); - }; + stream.addTrack(track); + receiverList.push([track, rtpReceiver, stream]); + } + } - 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 + 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. + self._transceive(self.transceivers[sdpMLineIndex], + false, + isNewTrack); + } else if (description.type === 'answer' && !rejected) { + transceiver = self.transceivers[sdpMLineIndex]; + iceGatherer = transceiver.iceGatherer; + iceTransport = transceiver.iceTransport; + dtlsTransport = transceiver.dtlsTransport; + rtpReceiver = transceiver.rtpReceiver; + sendEncodingParameters = transceiver.sendEncodingParameters; + localCapabilities = transceiver.localCapabilities; + + self.transceivers[sdpMLineIndex].recvEncodingParameters = + recvEncodingParameters; + self.transceivers[sdpMLineIndex].remoteCapabilities = + remoteCapabilities; + self.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); + }); } - }); - }; - } 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; - } + if (!usingBundle || sdpMLineIndex === 0) { + if (iceTransport.state === 'new') { + iceTransport.start(iceGatherer, remoteIceParameters, + 'controlling'); } - return this._dtmf; - }, - }); - } - }, + if (dtlsTransport.state === 'new') { + dtlsTransport.start(remoteDtlsParameters); + } + } - shimSourceObject: function(window) { - var URL = window && window.URL; + self._transceive(transceiver, + direction === 'sendrecv' || direction === 'recvonly', + direction === 'sendrecv' || direction === 'sendonly'); - 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 (rtpReceiver && + (direction === 'sendrecv' || direction === 'sendonly')) { + track = rtpReceiver.track; + if (remoteMsid) { + if (!streams[remoteMsid.stream]) { + streams[remoteMsid.stream] = new window.MediaStream(); } - - if (!stream) { - this.src = ''; - return undefined; + streams[remoteMsid.stream].addTrack(track); + receiverList.push([track, rtpReceiver, streams[remoteMsid.stream]]); + } else { + if (!streams.default) { + streams.default = new window.MediaStream(); } - 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); - }); + streams.default.addTrack(track); + receiverList.push([track, rtpReceiver, streams.default]); } - }); + } else { + // FIXME: actually the receiver should be created later. + delete transceiver.rtpReceiver; + } } - } - }, + }); - shimPeerConnection: function(window) { - var browserDetails = utils.detectBrowser(window); + if (this._dtlsRole === undefined) { + this._dtlsRole = description.type === 'offer' ? 'active' : 'passive'; + } - // The RTCPeerConnection object. - if (!window.RTCPeerConnection) { - 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; + this.remoteDescription = { + type: description.type, + sdp: description.sdp + }; + switch (description.type) { + case 'offer': + this._updateSignalingState('have-remote-offer'); + break; + case 'answer': + this._updateSignalingState('stable'); + break; + default: + throw new TypeError('unsupported type "' + description.type + + '"'); + } + Object.keys(streams).forEach(function(sid) { + var stream = streams[sid]; + if (stream.getTracks().length) { + if (self.remoteStreams.indexOf(stream) === -1) { + self.remoteStreams.push(stream); + var event = new Event('addstream'); + event.stream = stream; + window.setTimeout(function() { + self.dispatchEvent(event); + if (typeof self.onaddstream === 'function') { + self.onaddstream(event); + } + }); } - 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; + receiverList.forEach(function(item) { + var track = item[0]; + var receiver = item[1]; + if (stream.id !== item[2].id) { + return; } + var trackEvent = new Event('track'); + trackEvent.track = track; + trackEvent.receiver = receiver; + trackEvent.transceiver = {receiver: receiver}; + trackEvent.streams = [stream]; + window.setTimeout(function() { + self.dispatchEvent(trackEvent); + if (typeof self.ontrack === 'function') { + self.ontrack(trackEvent); + } + }); }); } - } else { - // 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')) { - console.warn('RTCIceServer.url is deprecated! Use urls instead.'); - 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; - // wrap static methods. Currently just generateCertificate. - Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', { - get: function() { - return OrigPeerConnection.generateCertificate; + }); + + // check whether addIceCandidate({}) was called within four seconds after + // setRemoteDescription. + window.setTimeout(function() { + if (!(self && self.transceivers)) { + return; + } + self.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({}); } }); - } - - var origGetStats = window.RTCPeerConnection.prototype.getStats; - window.RTCPeerConnection.prototype.getStats = function(selector, - successCallback, errorCallback) { - var self = this; - var args = arguments; + }, 4000); - // 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); + return new Promise(function(resolve) { + if (args.length > 1 && typeof args[1] === 'function') { + args[1].apply(null); } + resolve(); + }); + }; - // 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, []); + 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._updateSignalingState('closed'); + }; - 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))); - }; + // Update the signaling state. + RTCPeerConnection.prototype._updateSignalingState = function(newState) { + this.signalingState = newState; + var event = new Event('signalingstatechange'); + this.dispatchEvent(event); + if (typeof this.onsignalingstatechange === 'function') { + this.onsignalingstatechange(event); + } + }; - return origGetStats.apply(this, [successCallbackWrapper_, - arguments[0]]); + // Determine whether to fire the negotiationneeded event. + RTCPeerConnection.prototype._maybeFireNegotiationNeeded = function() { + var self = this; + if (this.signalingState !== 'stable' || this.needNegotiation === true) { + return; + } + this.needNegotiation = true; + window.setTimeout(function() { + if (self.needNegotiation === false) { + return; + } + self.needNegotiation = false; + var event = new Event('negotiationneeded'); + self.dispatchEvent(event); + if (typeof self.onnegotiationneeded === 'function') { + self.onnegotiationneeded(event); } + }, 0); + }; - // promise-support - return new Promise(function(resolve, reject) { - origGetStats.apply(self, [ - function(response) { - resolve(makeMapStats(fixChromeStats_(response))); - }, reject]); - }).then(successCallback, errorCallback); + // Update the connection state. + RTCPeerConnection.prototype._updateConnectionState = function() { + var newState; + var states = { + 'new': 0, + closed: 0, + connecting: 0, + checking: 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; - // 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 self = this; - var promise = new Promise(function(resolve, reject) { - nativeMethod.apply(self, [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]); - } - }); - }; - }); + newState = 'new'; + if (states.failed > 0) { + newState = 'failed'; + } else if (states.connecting > 0 || states.checking > 0) { + newState = 'connecting'; + } else if (states.disconnected > 0) { + newState = 'disconnected'; + } else if (states.new > 0) { + newState = 'new'; + } else if (states.connected > 0 || states.completed > 0) { + newState = 'connected'; } - // 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 self = 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(self, [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(); + if (newState !== this.iceConnectionState) { + this.iceConnectionState = newState; + var event = new Event('iceconnectionstatechange'); + this.dispatchEvent(event); + if (typeof this.oniceconnectionstatechange === 'function') { + this.oniceconnectionstatechange(event); } - return nativeAddIceCandidate.apply(this, arguments); - }; - } -}; - + } + }; -// Expose public methods. -module.exports = { - shimMediaStream: chromeShim.shimMediaStream, - shimOnTrack: chromeShim.shimOnTrack, - shimGetSendersWithDtmf: chromeShim.shimGetSendersWithDtmf, - shimSourceObject: chromeShim.shimSourceObject, - shimPeerConnection: chromeShim.shimPeerConnection, - shimGetUserMedia: require('./getusermedia') -}; + RTCPeerConnection.prototype.createOffer = function() { + var self = this; + var args = arguments; -},{"../utils.js":12,"./getusermedia":5}],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; + var offerOptions; + if (arguments.length === 1 && typeof arguments[0] !== 'function') { + offerOptions = arguments[0]; + } else if (arguments.length === 3) { + offerOptions = arguments[2]; + } -// Expose public methods. -module.exports = function(window) { - var browserDetails = utils.detectBrowser(window); - var navigator = window && window.navigator; + var numAudioTracks = this.transceivers.filter(function(t) { + return t.kind === 'audio'; + }).length; + var numVideoTracks = this.transceivers.filter(function(t) { + return t.kind === 'video'; + }).length; - 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; + // Determine number of audio and video tracks we need to send/recv. + if (offerOptions) { + // Reject Chrome legacy constraints. + if (offerOptions.mandatory || offerOptions.optional) { + throw new TypeError( + 'Legacy mandatory/optional constraints not supported.'); } - 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); + if (offerOptions.offerToReceiveAudio !== undefined) { + if (offerOptions.offerToReceiveAudio === true) { + numAudioTracks = 1; + } else if (offerOptions.offerToReceiveAudio === false) { + numAudioTracks = 0; } else { - oc[oldname_('', key)] = r.ideal; - cc.optional.push(oc); + numAudioTracks = offerOptions.offerToReceiveAudio; } } - 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) { - 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]; + if (offerOptions.offerToReceiveVideo !== undefined) { + if (offerOptions.offerToReceiveVideo === true) { + numVideoTracks = 1; + } else if (offerOptions.offerToReceiveVideo === false) { + numVideoTracks = 0; + } else { + numVideoTracks = offerOptions.offerToReceiveVideo; } - }; - 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 < 61; - 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']; + this.transceivers.forEach(function(transceiver) { + if (transceiver.kind === 'audio') { + numAudioTracks--; + if (numAudioTracks < 0) { + transceiver.wantReceive = false; } - 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); - }); + } else if (transceiver.kind === 'video') { + numVideoTracks--; + if (numVideoTracks < 0) { + transceiver.wantReceive = false; } } - constraints.video = constraintsToChrome_(constraints.video); - } - logging('chrome: ' + JSON.stringify(constraints)); - return func(constraints); - }; + }); - var shimError_ = function(e) { - return { - name: { - PermissionDeniedError: 'NotAllowedError', - InvalidStateError: 'NotReadableError', - DevicesNotFoundError: 'NotFoundError', - ConstraintNotSatisfiedError: 'OverconstrainedError', - TrackStartError: 'NotReadableError', - MediaDeviceFailedDueToShutdown: 'NotReadableError', - MediaDeviceKillSwitchOn: 'NotReadableError' - }[e.name] || e.name, - message: e.message, - constraint: e.constraintName, - toString: function() { - return this.name + (this.message && ': ') + this.message; + // Create M-lines for recvonly streams. + while (numAudioTracks > 0 || numVideoTracks > 0) { + if (numAudioTracks > 0) { + this._createTransceiver('audio'); + numAudioTracks--; } - }; - }; + if (numVideoTracks > 0) { + this._createTransceiver('video'); + numVideoTracks--; + } + } - var getUserMedia_ = function(constraints, onSuccess, onError) { - shimConstraints_(constraints, function(c) { - navigator.webkitGetUserMedia(c, onSuccess, function(e) { - onError(shimError_(e)); - }); - }); - }; + var sdp = SDPUtils.writeSessionBoilerplate(this._sdpSessionId, + this._sdpSessionVersion++); + this.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 = SDPUtils.generateIdentifier(); + transceiver.mid = mid; - navigator.getUserMedia = getUserMedia_; + if (!transceiver.iceGatherer) { + transceiver.iceGatherer = self._createIceGatherer(sdpMLineIndex, + self.usingBundle); + } - // 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(); + 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'; }); - throw new DOMException('', 'NotFoundError'); - } - return stream; - }, function(e) { - return Promise.reject(shimError_(e)); - }); + } + 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'; + } }); - }; - } - - // 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":12}],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'; + // 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 + }; + } + } -var utils = require('../utils'); -var shimRTCPeerConnection = require('./rtcpeerconnection_shim'); + if (transceiver.wantReceive) { + transceiver.rtpReceiver = new window.RTCRtpReceiver( + transceiver.dtlsTransport, kind); + } -module.exports = { - shimGetUserMedia: require('./getusermedia'), - shimPeerConnection: function(window) { - var browserDetails = utils.detectBrowser(window); + transceiver.localCapabilities = localCapabilities; + transceiver.sendEncodingParameters = sendEncodingParameters; + }); - if (window.RTCIceGatherer) { - // ORTC defines an RTCIceCandidate object but no constructor. - // Not implemented in Edge. - if (!window.RTCIceCandidate) { - window.RTCIceCandidate = function(args) { - return args; - }; - } - // ORTC does not have a session description object but - // other browsers (i.e. Chrome) that will support both PC and ORTC - // in the future might have this defined already. - 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); - } - }); - } - } - window.RTCPeerConnection = - shimRTCPeerConnection(window, browserDetails.version); - }, - 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; + // always offer BUNDLE and dispose on return if not supported. + if (this._config.bundlePolicy !== 'max-compat') { + sdp += 'a=group:BUNDLE ' + this.transceivers.map(function(t) { + return t.mid; + }).join(' ') + '\r\n'; } - } -}; + sdp += 'a=ice-options:trickle\r\n'; -},{"../utils":12,"./getusermedia":7,"./rtcpeerconnection_shim":8}],7:[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'; + this.transceivers.forEach(function(transceiver, sdpMLineIndex) { + sdp += writeMediaSection(transceiver, transceiver.localCapabilities, + 'offer', transceiver.stream, self._dtlsRole); + sdp += 'a=rtcp-rsize\r\n'; -// Expose public methods. -module.exports = function(window) { - var navigator = window && window.navigator; + if (transceiver.iceGatherer && self.iceGatheringState !== 'new' && + (sdpMLineIndex === 0 || !self.usingBundle)) { + transceiver.iceGatherer.getLocalCandidates().forEach(function(cand) { + cand.component = 1; + sdp += 'a=' + SDPUtils.writeCandidate(cand) + '\r\n'; + }); - var shimError_ = function(e) { - return { - name: {PermissionDeniedError: 'NotAllowedError'}[e.name] || e.name, - message: e.message, - constraint: e.constraint, - toString: function() { - return this.name; + if (transceiver.iceGatherer.state === 'completed') { + sdp += 'a=end-of-candidates\r\n'; + } } - }; - }; + }); - // 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)); + var desc = new window.RTCSessionDescription({ + type: 'offer', + sdp: sdp + }); + return new Promise(function(resolve) { + if (args.length > 0 && typeof args[0] === 'function') { + args[0].apply(null, [desc]); + resolve(); + return; + } + resolve(desc); }); }; -}; - -},{}],8:[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'); + RTCPeerConnection.prototype.createAnswer = function() { + var self = this; + var args = arguments; -// sort tracks such that they follow an a-v-a-v... -// pattern. -function sortTracks(tracks) { - var audioTracks = tracks.filter(function(track) { - return track.kind === 'audio'; - }); - var videoTracks = tracks.filter(function(track) { - return track.kind === 'video'; - }); - tracks = []; - while (audioTracks.length || videoTracks.length) { - if (audioTracks.length) { - tracks.push(audioTracks.shift()); - } - if (videoTracks.length) { - tracks.push(videoTracks.shift()); + var sdp = SDPUtils.writeSessionBoilerplate(this._sdpSessionId, + this._sdpSessionVersion++); + if (this.usingBundle) { + sdp += 'a=group:BUNDLE ' + this.transceivers.map(function(t) { + return t.mid; + }).join(' ') + '\r\n'; } - } - return tracks; -} - -// Edge does not like -// 1) stun: -// 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 mediaSectionsInOffer = SDPUtils.splitSections( + this.remoteDescription.sdp).length - 1; + this.transceivers.forEach(function(transceiver, sdpMLineIndex) { + if (sdpMLineIndex + 1 > mediaSectionsInOffer) { + return; } - var isString = typeof urls === 'string'; - if (isString) { - urls = [urls]; + if (transceiver.isDatachannel) { + sdp += 'm=application 0 DTLS/SCTP 5000\r\n' + + 'c=IN IP4 0.0.0.0\r\n' + + 'a=mid:' + transceiver.mid + '\r\n'; + return; } - 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; + // 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]; } - return url.indexOf('stun:') === 0 && edgeVersion >= 14393; - }); - - delete server.url; - server.urls = isString ? urls[0] : urls; - return !!urls.length; - } - return false; - }); -} - -// 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; + if (localTrack) { + // add RTX + if (edgeVersion >= 15019 && transceiver.kind === 'video' && + !transceiver.sendEncodingParameters[0].rtx) { + transceiver.sendEncodingParameters[0].rtx = { + ssrc: transceiver.sendEncodingParameters[0].ssrc + 1 + }; } } - 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; -} - -module.exports = function(window, edgeVersion) { - var RTCPeerConnection = function(config) { - var self = this; - - var _eventTarget = document.createDocumentFragment(); - ['addEventListener', 'removeEventListener', 'dispatchEvent'] - .forEach(function(method) { - self[method] = _eventTarget[method].bind(_eventTarget); - }); - - this.needNegotiation = false; + // Calculate intersection of capabilities. + var commonCapabilities = getCommonCapabilities( + transceiver.localCapabilities, + transceiver.remoteCapabilities); - this.onicecandidate = null; - this.onaddstream = null; - this.ontrack = null; - this.onremovestream = null; - this.onsignalingstatechange = null; - this.oniceconnectionstatechange = null; - this.onicegatheringstatechange = null; - this.onnegotiationneeded = null; - this.ondatachannel = null; - this.canTrickleIceCandidates = null; + var hasRtx = commonCapabilities.codecs.filter(function(c) { + return c.name.toLowerCase() === 'rtx'; + }).length; + if (!hasRtx && transceiver.sendEncodingParameters[0].rtx) { + delete transceiver.sendEncodingParameters[0].rtx; + } - this.localStreams = []; - this.remoteStreams = []; - this.getLocalStreams = function() { - return self.localStreams; - }; - this.getRemoteStreams = function() { - return self.remoteStreams; - }; + sdp += writeMediaSection(transceiver, commonCapabilities, + 'answer', transceiver.stream, self._dtlsRole); + if (transceiver.rtcpParameters && + transceiver.rtcpParameters.reducedSize) { + sdp += 'a=rtcp-rsize\r\n'; + } + }); - this.localDescription = new window.RTCSessionDescription({ - type: '', - sdp: '' + var desc = new window.RTCSessionDescription({ + type: 'answer', + sdp: sdp }); - this.remoteDescription = new window.RTCSessionDescription({ - type: '', - sdp: '' + return new Promise(function(resolve) { + if (args.length > 0 && typeof args[0] === 'function') { + args[0].apply(null, [desc]); + resolve(); + return; + } + resolve(desc); }); - this.signalingState = 'stable'; - this.iceConnectionState = 'new'; - this.iceGatheringState = 'new'; + }; - this.iceOptions = { - gatherPolicy: 'all', - iceServers: [] - }; - if (config && config.iceTransportPolicy) { - switch (config.iceTransportPolicy) { - case 'all': - case 'relay': - this.iceOptions.gatherPolicy = config.iceTransportPolicy; - break; - default: - // don't set iceTransportPolicy. + RTCPeerConnection.prototype.addIceCandidate = function(candidate) { + var err; + var sections; + if (!candidate || candidate.candidate === '') { + for (var j = 0; j < this.transceivers.length; j++) { + if (this.transceivers[j].isDatachannel) { + continue; + } + this.transceivers[j].iceTransport.addRemoteCandidate({}); + sections = SDPUtils.splitSections(this.remoteDescription.sdp); + sections[j + 1] += 'a=end-of-candidates\r\n'; + this.remoteDescription.sdp = sections.join(''); + if (this.usingBundle) { break; + } } - } - this.usingBundle = config && config.bundlePolicy === 'max-bundle'; - - if (config && config.iceServers) { - this.iceOptions.iceServers = filterIceServers(config.iceServers, - edgeVersion); - } - this._config = config || {}; - - // per-track iceGathers, iceTransports, dtlsTransports, rtpSenders, ... - // everything that is needed to describe a SDP m-line. - this.transceivers = []; - - // since the iceGatherer is currently created in createOffer but we - // must not emit candidates until after setLocalDescription we buffer - // them in this array. - this._localIceCandidatesBuffer = []; - - this._sdpSessionId = SDPUtils.generateSessionId(); - }; - - RTCPeerConnection.prototype._emitGatheringStateChange = function() { - var event = new Event('icegatheringstatechange'); - this.dispatchEvent(event); - if (this.onicegatheringstatechange !== null) { - this.onicegatheringstatechange(event); - } - }; + } else if (!(candidate.sdpMLineIndex !== undefined || candidate.sdpMid)) { + throw new TypeError('sdpMLineIndex or sdpMid required'); + } else if (!this.remoteDescription) { + err = new Error('Can not add ICE candidate without ' + + 'a remote description'); + err.name = 'InvalidStateError'; + } else { + var sdpMLineIndex = candidate.sdpMLineIndex; + if (candidate.sdpMid) { + for (var i = 0; i < this.transceivers.length; i++) { + if (this.transceivers[i].mid === candidate.sdpMid) { + sdpMLineIndex = i; + break; + } + } + } + var transceiver = this.transceivers[sdpMLineIndex]; + if (transceiver) { + if (transceiver.isDatachannel) { + return Promise.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 Promise.resolve(); + } + // Ignore RTCP candidates, we assume RTCP-MUX. + if (cand.component && cand.component !== 1) { + return Promise.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 !== this.transceivers[0].iceTransport)) { + if (!maybeAddCandidate(transceiver.iceTransport, cand)) { + err = new Error('Can not add ICE candidate'); + err.name = 'OperationError'; + } + } - RTCPeerConnection.prototype._emitBufferedCandidates = function() { - var self = this; - var sections = SDPUtils.splitSections(self.localDescription.sdp); - // FIXME: need to apply ice candidates in a way which is async but - // in-order - this._localIceCandidatesBuffer.forEach(function(event) { - var end = !event.candidate || Object.keys(event.candidate).length === 0; - if (end) { - for (var j = 1; j < sections.length; j++) { - if (sections[j].indexOf('\r\na=end-of-candidates\r\n') === -1) { - sections[j] += 'a=end-of-candidates\r\n'; + if (!err) { + // update the remoteDescription. + var candidateString = candidate.candidate.trim(); + if (candidateString.indexOf('a=') === 0) { + candidateString = candidateString.substr(2); } + sections = SDPUtils.splitSections(this.remoteDescription.sdp); + sections[sdpMLineIndex + 1] += 'a=' + + (cand.type ? candidateString : 'end-of-candidates') + + '\r\n'; + this.remoteDescription.sdp = sections.join(''); } } else { - sections[event.candidate.sdpMLineIndex + 1] += - 'a=' + event.candidate.candidate + '\r\n'; - } - self.localDescription.sdp = sections.join(''); - self.dispatchEvent(event); - if (self.onicecandidate !== null) { - self.onicecandidate(event); + err = new Error('Can not add ICE candidate'); + err.name = 'OperationError'; } - if (!event.candidate && self.iceGatheringState !== 'complete') { - var complete = self.transceivers.every(function(transceiver) { - return transceiver.iceGatherer && - transceiver.iceGatherer.state === 'completed'; - }); - if (complete && self.iceGatheringStateChange !== 'complete') { - self.iceGatheringState = 'complete'; - self._emitGatheringStateChange(); + } + var args = arguments; + return new Promise(function(resolve, reject) { + if (err) { + if (args.length > 2 && typeof args[2] === 'function') { + args[2].apply(null, [err]); + } + reject(err); + } else { + if (args.length > 1 && typeof args[1] === 'function') { + args[1].apply(null); } + resolve(); } }); - this._localIceCandidatesBuffer = []; - }; - - RTCPeerConnection.prototype.getConfiguration = function() { - return this._config; }; - // internal helper to create a transceiver object. - // (whih is not yet the same as the WebRTC 1.0 transceiver) - RTCPeerConnection.prototype._createTransceiver = function(kind) { - 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, - 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; - } - this.transceivers.push(transceiver); - return transceiver; - }; - - RTCPeerConnection.prototype.addTrack = function(track, stream) { - 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); - } - - transceiver.track = track; - transceiver.stream = stream; - transceiver.rtpSender = new window.RTCRtpSender(track, - transceiver.dtlsTransport); - - this._maybeFireNegotiationNeeded(); - return transceiver.rtpSender; - }; - - RTCPeerConnection.prototype.addStream = function(stream) { - var self = this; - if (edgeVersion >= 15025) { - this.localStreams.push(stream); - stream.getTracks().forEach(function(track) { - self.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; + RTCPeerConnection.prototype.getStats = function() { + var promises = []; + this.transceivers.forEach(function(transceiver) { + ['rtpSender', 'rtpReceiver', 'iceGatherer', 'iceTransport', + 'dtlsTransport'].forEach(function(method) { + if (transceiver[method]) { + promises.push(transceiver[method].getStats()); + } + }); + }); + var cb = arguments.length > 1 && typeof arguments[1] === 'function' && + arguments[1]; + var fixStatsType = function(stat) { + return { + inboundrtp: 'inbound-rtp', + outboundrtp: 'outbound-rtp', + candidatepair: 'candidate-pair', + localcandidate: 'local-candidate', + remotecandidate: 'remote-candidate' + }[stat.type] || stat.type; + }; + return new Promise(function(resolve) { + // shim getStats with maplike support + var results = new Map(); + Promise.all(promises).then(function(res) { + res.forEach(function(result) { + Object.keys(result).forEach(function(id) { + result[id].type = fixStatsType(result[id]); + results.set(id, result[id]); + }); }); + if (cb) { + cb.apply(null, results); + } + resolve(results); }); - clonedStream.getTracks().forEach(function(track) { - self.addTrack(track, clonedStream); - }); - this.localStreams.push(clonedStream); - } - this._maybeFireNegotiationNeeded(); - }; - - RTCPeerConnection.prototype.removeStream = function(stream) { - var idx = this.localStreams.indexOf(stream); - if (idx > -1) { - this.localStreams.splice(idx, 1); - this._maybeFireNegotiationNeeded(); - } - }; - - RTCPeerConnection.prototype.getSenders = function() { - return this.transceivers.filter(function(transceiver) { - return !!transceiver.rtpSender; - }) - .map(function(transceiver) { - return transceiver.rtpSender; }); }; + return RTCPeerConnection; +}; - RTCPeerConnection.prototype.getReceivers = function() { - return this.transceivers.filter(function(transceiver) { - return !!transceiver.rtpReceiver; - }) - .map(function(transceiver) { - return transceiver.rtpReceiver; - }); - }; +},{"sdp":2}],2:[function(require,module,exports){ + /* eslint-env node */ +'use strict'; - // Create ICE gatherer and hook it up. - RTCPeerConnection.prototype._createIceGatherer = function(mid, - sdpMLineIndex) { - var self = this; - var iceGatherer = new window.RTCIceGatherer(self.iceOptions); - iceGatherer.onlocalcandidate = function(evt) { - var event = new Event('icecandidate'); - event.candidate = {sdpMid: mid, sdpMLineIndex: sdpMLineIndex}; +// SDP helpers. +var SDPUtils = {}; - var cand = evt.candidate; - var end = !cand || Object.keys(cand).length === 0; - // Edge emits an empty object for RTCIceCandidateComplete‥ - if (end) { - // polyfill since RTCIceGatherer.state is not implemented in - // Edge 10547 yet. - if (iceGatherer.state === undefined) { - iceGatherer.state = 'completed'; - } - } else { - // RTCIceCandidate doesn't have a component, needs to be added - cand.component = 1; - event.candidate.candidate = SDPUtils.writeCandidate(cand); - } +// 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); +}; - // update local description. - var sections = SDPUtils.splitSections(self.localDescription.sdp); - if (!end) { - sections[event.candidate.sdpMLineIndex + 1] += - 'a=' + event.candidate.candidate + '\r\n'; - } else { - sections[event.candidate.sdpMLineIndex + 1] += - 'a=end-of-candidates\r\n'; - } - self.localDescription.sdp = sections.join(''); - var transceivers = self._pendingOffer ? self._pendingOffer : - self.transceivers; - var complete = transceivers.every(function(transceiver) { - return transceiver.iceGatherer && - transceiver.iceGatherer.state === 'completed'; - }); +// The RTCP CNAME used by all peerconnections from the same JS. +SDPUtils.localCName = SDPUtils.generateIdentifier(); - // Emit candidate if localDescription is set. - // Also emits null candidate when all gatherers are complete. - switch (self.iceGatheringState) { - case 'new': - if (!end) { - self._localIceCandidatesBuffer.push(event); - } - if (end && complete) { - self._localIceCandidatesBuffer.push( - new Event('icecandidate')); - } - break; - case 'gathering': - self._emitBufferedCandidates(); - if (!end) { - self.dispatchEvent(event); - if (self.onicecandidate !== null) { - self.onicecandidate(event); - } - } - if (complete) { - self.dispatchEvent(new Event('icecandidate')); - if (self.onicecandidate !== null) { - self.onicecandidate(new Event('icecandidate')); - } - self.iceGatheringState = 'complete'; - self._emitGatheringStateChange(); - } - break; - case 'complete': - // should not happen... currently! - break; - default: // no-op. - break; - } - }; - return iceGatherer; - }; +// 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'; + }); +}; - // Create ICE transport and DTLS transport. - RTCPeerConnection.prototype._createIceAndDtlsTransports = function() { - var self = this; - var iceTransport = new window.RTCIceTransport(null); - iceTransport.onicestatechange = function() { - self._updateConnectionState(); - }; +// 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; + }); +}; - var dtlsTransport = new window.RTCDtlsTransport(iceTransport); - dtlsTransport.ondtlsstatechange = function() { - self._updateConnectionState(); - }; - dtlsTransport.onerror = function() { - // onerror does not set state to failed by itself. - Object.defineProperty(dtlsTransport, 'state', - {value: 'failed', writable: true}); - self._updateConnectionState(); - }; +// 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(' '); + } - return { - iceTransport: iceTransport, - dtlsTransport: dtlsTransport - }; + 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), + // skip parts[6] == 'typ' + type: parts[7] }; - // 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.ondtlssttatechange; - delete dtlsTransport.onerror; - delete this.transceivers[sdpMLineIndex].dtlsTransport; + 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; +}; - // 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 +// 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.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); // was: relAddr + sdp.push('rport'); + sdp.push(candidate.relatedPort); // was: relPort + } + if (candidate.tcpType && candidate.protocol.toLowerCase() === 'tcp') { + sdp.push('tcptype'); + sdp.push(candidate.tcpType); + } + if (candidate.ufrag) { + sdp.push('ufrag'); + sdp.push(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 + // was: channels + parsed.numChannels = parts.length === 3 ? parseInt(parts[2], 10) : 1; + 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; + } + return 'a=rtpmap:' + pt + ' ' + codec.name + '/' + codec.clockRate + + (codec.numChannels !== 1 ? '/' + codec.numChannels : '') + '\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) { + params.push(param + '=' + codec.parameters[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; +}; + +// 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: 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'; + + 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.split(' '); + parts.shift(); + 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), + 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 + }); + } + + // 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 = {}; + + var cname; + // Gets the first SSRC. Note that 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(parts) { + return parts.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 +SDPUtils.writeSessionBoilerplate = function(sessId, sessVer) { + var sessionId; + var version = sessVer !== undefined ? sessVer : 2; + if (sessId) { + sessionId = sessId; + } else { + sessionId = SDPUtils.generateSessionId(); + } + // FIXME: sess-id should be an NTP timestamp. + 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); + + // 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 mline = lines[0].split(' '); + return { + kind: mline[0].substr(2), + port: parseInt(mline[1], 10), + protocol: mline[2], + fmt: mline.slice(3).join(' ') + }; +}; + +// 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); + + // Export to the adapter global object visible in the browser. + var adapter = { + browserDetails: browserDetails, + extractVersion: utils.extractVersion, + disableLog: utils.disableLog, + disableWarnings: utils.disableWarnings + }; + + // 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; + + // 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); + + commonShim.shimRTCIceCandidate(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); + + commonShim.shimRTCIceCandidate(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. + 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.shimCallbacksAPI(window); + safariShim.shimLocalStreamsAPI(window); + safariShim.shimRemoteStreamsAPI(window); + safariShim.shimTrackEventTransceiver(window); + safariShim.shimGetUserMedia(window); + safariShim.shimCreateOfferLegacy(window); + + commonShim.shimRTCIceCandidate(window); + break; + default: + logging('Unsupported browser!'); + break; + } + + return adapter; +}; + +},{"./chrome/chrome_shim":5,"./common_shim":7,"./edge/edge_shim":8,"./firefox/firefox_shim":10,"./safari/safari_shim":12,"./utils":13}],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; + +var chromeShim = { + 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); + } + }); + 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); }; - if (transceiver.recvEncodingParameters.length) { - params.rtcp.ssrc = transceiver.recvEncodingParameters[0].ssrc; + } + }, + + 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); + } + }; } - transceiver.rtpSender.send(params); + 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; + } + }); } - if (recv && transceiver.rtpReceiver) { - // remove RTX field in Edge 14942 - if (transceiver.kind === 'video' - && transceiver.recvEncodingParameters - && edgeVersion < 15019) { - transceiver.recvEncodingParameters.forEach(function(p) { - delete p.rtx; + }, + + 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); + }); + } }); } - params.encodings = transceiver.recvEncodingParameters; - params.rtcp = { - cname: transceiver.rtcpParameters.cname, - compound: transceiver.rtcpParameters.compound - }; - if (transceiver.sendEncodingParameters.length) { - params.rtcp.ssrc = transceiver.sendEncodingParameters[0].ssrc; - } - transceiver.rtpReceiver.receive(params); } - }; - - RTCPeerConnection.prototype.setLocalDescription = function(description) { - var self = this; + }, - if (!isActionAllowedInSignalingState('setLocalDescription', - description.type, this.signalingState)) { - var e = new Error('Can not set local ' + description.type + - ' in state ' + this.signalingState); - e.name = 'InvalidStateError'; - if (arguments.length > 2 && typeof arguments[2] === 'function') { - window.setTimeout(arguments[2], 0, e); - } - return Promise.reject(e); + shimAddTrackRemoveTrack: function(window) { + var browserDetails = utils.detectBrowser(window); + // shim addTrack and removeTrack. + if (window.RTCPeerConnection.prototype.addTrack && + browserDetails.version >= 63) { + return; } - var sections; - var sessionpart; - if (description.type === 'offer') { - // FIXME: What was the purpose of this empty if statement? - // if (!this._pendingOffer) { - // } else { - if (this._pendingOffer) { - // 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); - self._pendingOffer[sdpMLineIndex].localCapabilities = caps; - }); - this.transceivers = this._pendingOffer; - delete this._pendingOffer; - } - } else if (description.type === 'answer') { - sections = SDPUtils.splitSections(self.remoteDescription.sdp); - sessionpart = sections.shift(); - var isIceLite = SDPUtils.matchPrefix(sessionpart, - 'a=ice-lite').length > 0; - sections.forEach(function(mediaSection, sdpMLineIndex) { - var transceiver = self.transceivers[sdpMLineIndex]; - var iceGatherer = transceiver.iceGatherer; - var iceTransport = transceiver.iceTransport; - var dtlsTransport = transceiver.dtlsTransport; - var localCapabilities = transceiver.localCapabilities; - var remoteCapabilities = transceiver.remoteCapabilities; - - var rejected = SDPUtils.isRejected(mediaSection); - - if (!rejected && !transceiver.isDatachannel) { - var remoteIceParameters = SDPUtils.getIceParameters( - mediaSection, sessionpart); - var remoteDtlsParameters = SDPUtils.getDtlsParameters( - mediaSection, sessionpart); - if (isIceLite) { - remoteDtlsParameters.role = 'server'; - } - - if (!self.usingBundle || sdpMLineIndex === 0) { - iceTransport.start(iceGatherer, remoteIceParameters, - isIceLite ? 'controlling' : 'controlled'); - dtlsTransport.start(remoteDtlsParameters); - } + // 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 self = this; + var nativeStreams = origGetLocalStreams.apply(this); + self._reverseStreams = self._reverseStreams || {}; + return nativeStreams.map(function(stream) { + return self._reverseStreams[stream.id]; + }); + }; - // Calculate intersection of capabilities. - var params = getCommonCapabilities(localCapabilities, - remoteCapabilities); + var origAddStream = window.RTCPeerConnection.prototype.addStream; + window.RTCPeerConnection.prototype.addStream = function(stream) { + var pc = this; + pc._streams = pc._streams || {}; + pc._reverseStreams = pc._reverseStreams || {}; - // Start the RTCRtpSender. The RTCRtpReceiver for this - // transceiver has already been started in setRemoteDescription. - self._transceive(transceiver, - params.codecs.length > 0, - false); + 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]); + }; - this.localDescription = { - type: description.type, - sdp: description.sdp + 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]; }; - switch (description.type) { - case 'offer': - this._updateSignalingState('have-local-offer'); - break; - case 'answer': - this._updateSignalingState('stable'); - break; - default: - throw new TypeError('unsupported type "' + description.type + - '"'); - } - // If a success callback was provided, emit ICE candidates after it - // has been executed. Otherwise, emit callback after the Promise is - // resolved. - var hasCallback = arguments.length > 1 && - typeof arguments[1] === 'function'; - if (hasCallback) { - var cb = arguments[1]; - window.setTimeout(function() { - cb(); - if (self.iceGatheringState === 'new') { - self.iceGatheringState = 'gathering'; - self._emitGatheringStateChange(); - } - self._emitBufferedCandidates(); - }, 0); - } - var p = Promise.resolve(); - p.then(function() { - if (!hasCallback) { - if (self.iceGatheringState === 'new') { - self.iceGatheringState = 'gathering'; - self._emitGatheringStateChange(); - } - // Usually candidates will be emitted earlier. - window.setTimeout(self._emitBufferedCandidates.bind(self), 500); + 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'); } - }); - return p; - }; - RTCPeerConnection.prototype.setRemoteDescription = function(description) { - var self = this; + var alreadyExists = pc.getSenders().find(function(s) { + return s.track === track; + }); + if (alreadyExists) { + throw new DOMException('Track already exists.', + 'InvalidAccessError'); + } - if (!isActionAllowedInSignalingState('setRemoteDescription', - description.type, this.signalingState)) { - var e = new Error('Can not set remote ' + description.type + - ' in state ' + this.signalingState); - e.name = 'InvalidStateError'; - if (arguments.length > 2 && typeof arguments[2] === 'function') { - window.setTimeout(arguments[2], 0, e); + 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 Promise.reject(e); - } + return pc.getSenders().find(function(s) { + return s.track === track; + }); + }; - var streams = {}; - 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; - this.usingBundle = usingBundle; - var iceOptions = SDPUtils.matchPrefix(sessionpart, - 'a=ice-options:')[0]; - if (iceOptions) { - this.canTrickleIceCandidates = iceOptions.substr(14).split(' ') - .indexOf('trickle') >= 0; - } else { - this.canTrickleIceCandidates = false; + // 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); + }); + }; + }); - sections.forEach(function(mediaSection, sdpMLineIndex) { - var lines = SDPUtils.splitLines(mediaSection); - var kind = SDPUtils.getKind(mediaSection); - var rejected = SDPUtils.isRejected(mediaSection); - var protocol = lines[0].substr(2).split(' ')[2]; + 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 direction = SDPUtils.getDirection(mediaSection, sessionpart); - var remoteMsid = SDPUtils.parseMsid(mediaSection); + // TODO: mangle getStats: https://w3c.github.io/webrtc-stats/#dom-rtcmediastreamstats-streamidentifier - var mid = SDPUtils.getMid(mediaSection) || SDPUtils.generateIdentifier(); + 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); + } + }); - // Reject datachannels which are not implemented yet. - if (kind === 'application' && protocol === 'DTLS/SCTP') { - self.transceivers[sdpMLineIndex] = { - mid: mid, - isDatachannel: true - }; - return; + 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'); } - var transceiver; - var iceGatherer; - var iceTransport; - var dtlsTransport; - var rtpReceiver; - var sendEncodingParameters; - var recvEncodingParameters; - var localCapabilities; + // 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]; + } + }); - 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'; + 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')); } - 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' || cand.component === 1; - }); + shimPeerConnection: function(window) { + var browserDetails = utils.detectBrowser(window); - // Check if we can use BUNDLE and dispose transports. - if ((description.type === 'offer' || description.type === 'answer') && - !rejected && usingBundle && sdpMLineIndex > 0 && - self.transceivers[sdpMLineIndex]) { - self._disposeIceAndDtlsTransports(sdpMLineIndex); - self.transceivers[sdpMLineIndex].iceGatherer = - self.transceivers[0].iceGatherer; - self.transceivers[sdpMLineIndex].iceTransport = - self.transceivers[0].iceTransport; - self.transceivers[sdpMLineIndex].dtlsTransport = - self.transceivers[0].dtlsTransport; - if (self.transceivers[sdpMLineIndex].rtpSender) { - self.transceivers[sdpMLineIndex].rtpSender.setTransport( - self.transceivers[0].dtlsTransport); + // The RTCPeerConnection object. + if (!window.RTCPeerConnection) { + 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; } - if (self.transceivers[sdpMLineIndex].rtpReceiver) { - self.transceivers[sdpMLineIndex].rtpReceiver.setTransport( - self.transceivers[0].dtlsTransport); + + 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; + } + }); + } + } else { + // 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; + 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. + 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 self = 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); } - if (description.type === 'offer' && !rejected) { - transceiver = self.transceivers[sdpMLineIndex] || - self._createTransceiver(kind); - transceiver.mid = mid; - if (!transceiver.iceGatherer) { - transceiver.iceGatherer = usingBundle && sdpMLineIndex > 0 ? - self.transceivers[0].iceGatherer : - self._createIceGatherer(mid, sdpMLineIndex); - } + // 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, []); + } - if (isComplete && (!usingBundle || sdpMLineIndex === 0)) { - transceiver.iceTransport.setRemoteCandidates(cands); - } + 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; + }); - localCapabilities = window.RTCRtpReceiver.getCapabilities(kind); + return standardReport; + }; - // 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'; - }); - } + // shim getStats with maplike support + var makeMapStats = function(stats) { + return new Map(Object.keys(stats).map(function(key) { + return [key, stats[key]]; + })); + }; - sendEncodingParameters = [{ - ssrc: (2 * sdpMLineIndex + 2) * 1001 - }]; + if (arguments.length >= 2) { + var successCallbackWrapper_ = function(response) { + args[1](makeMapStats(fixChromeStats_(response))); + }; - if (direction === 'sendrecv' || direction === 'sendonly') { - rtpReceiver = new window.RTCRtpReceiver(transceiver.dtlsTransport, - kind); + return origGetStats.apply(this, [successCallbackWrapper_, + arguments[0]]); + } - track = rtpReceiver.track; - // FIXME: does not work with Plan B. - if (remoteMsid) { - if (!streams[remoteMsid.stream]) { - streams[remoteMsid.stream] = new window.MediaStream(); - Object.defineProperty(streams[remoteMsid.stream], 'id', { - get: function() { - return remoteMsid.stream; - } + // promise-support + return new Promise(function(resolve, reject) { + origGetStats.apply(self, [ + 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 self = this; + var promise = new Promise(function(resolve, reject) { + nativeMethod.apply(self, [args[0], resolve, reject]); }); - } - Object.defineProperty(track, 'id', { - get: function() { - return remoteMsid.track; + 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 self = 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(self, [resolve, reject, opts]); }); - streams[remoteMsid.stream].addTrack(track); - receiverList.push([track, rtpReceiver, - streams[remoteMsid.stream]]); - } else { - if (!streams.default) { - streams.default = new window.MediaStream(); - } - streams.default.addTrack(track); - receiverList.push([track, rtpReceiver, streams.default]); } - } + return nativeMethod.apply(this, arguments); + }; + }); + } - transceiver.localCapabilities = localCapabilities; - transceiver.remoteCapabilities = remoteCapabilities; - transceiver.rtpReceiver = rtpReceiver; - transceiver.rtcpParameters = rtcpParameters; - transceiver.sendEncodingParameters = sendEncodingParameters; - transceiver.recvEncodingParameters = recvEncodingParameters; + // 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); + }; + }); - // Start the RTCRtpReceiver now. The RTPSender is started in - // setLocalDescription. - self._transceive(self.transceivers[sdpMLineIndex], - false, - direction === 'sendrecv' || direction === 'sendonly'); - } else if (description.type === 'answer' && !rejected) { - transceiver = self.transceivers[sdpMLineIndex]; - iceGatherer = transceiver.iceGatherer; - iceTransport = transceiver.iceTransport; - dtlsTransport = transceiver.dtlsTransport; - rtpReceiver = transceiver.rtpReceiver; - sendEncodingParameters = transceiver.sendEncodingParameters; - localCapabilities = transceiver.localCapabilities; + // 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); + }; + } +}; - self.transceivers[sdpMLineIndex].recvEncodingParameters = - recvEncodingParameters; - self.transceivers[sdpMLineIndex].remoteCapabilities = - remoteCapabilities; - self.transceivers[sdpMLineIndex].rtcpParameters = rtcpParameters; - if ((isIceLite || isComplete) && cands.length) { - iceTransport.setRemoteCandidates(cands); - } - if (!usingBundle || sdpMLineIndex === 0) { - iceTransport.start(iceGatherer, remoteIceParameters, - 'controlling'); - dtlsTransport.start(remoteDtlsParameters); - } +// Expose public methods. +module.exports = { + shimMediaStream: chromeShim.shimMediaStream, + shimOnTrack: chromeShim.shimOnTrack, + shimAddTrackRemoveTrack: chromeShim.shimAddTrackRemoveTrack, + shimGetSendersWithDtmf: chromeShim.shimGetSendersWithDtmf, + shimSourceObject: chromeShim.shimSourceObject, + shimPeerConnection: chromeShim.shimPeerConnection, + shimGetUserMedia: require('./getusermedia') +}; - self._transceive(transceiver, - direction === 'sendrecv' || direction === 'recvonly', - direction === 'sendrecv' || direction === 'sendonly'); +},{"../utils.js":13,"./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; - if (rtpReceiver && - (direction === 'sendrecv' || direction === 'sendonly')) { - track = rtpReceiver.track; - if (remoteMsid) { - if (!streams[remoteMsid.stream]) { - streams[remoteMsid.stream] = new window.MediaStream(); - } - streams[remoteMsid.stream].addTrack(track); - receiverList.push([track, rtpReceiver, streams[remoteMsid.stream]]); - } else { - if (!streams.default) { - streams.default = new window.MediaStream(); - } - streams.default.addTrack(track); - receiverList.push([track, rtpReceiver, streams.default]); - } +// 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 { - // FIXME: actually the receiver should be created later. - delete transceiver.rtpReceiver; + oc[oldname_('', key)] = r.ideal; + cc.optional.push(oc); } } - }); - - this.remoteDescription = { - type: description.type, - sdp: description.sdp - }; - switch (description.type) { - case 'offer': - this._updateSignalingState('have-remote-offer'); - break; - case 'answer': - this._updateSignalingState('stable'); - break; - default: - throw new TypeError('unsupported type "' + description.type + - '"'); - } - Object.keys(streams).forEach(function(sid) { - var stream = streams[sid]; - if (stream.getTracks().length) { - self.remoteStreams.push(stream); - var event = new Event('addstream'); - event.stream = stream; - self.dispatchEvent(event); - if (self.onaddstream !== null) { - window.setTimeout(function() { - self.onaddstream(event); - }, 0); - } - - receiverList.forEach(function(item) { - var track = item[0]; - var receiver = item[1]; - if (stream.id !== item[2].id) { - return; - } - var trackEvent = new Event('track'); - trackEvent.track = track; - trackEvent.receiver = receiver; - trackEvent.streams = [stream]; - self.dispatchEvent(trackEvent); - if (self.ontrack !== null) { - window.setTimeout(function() { - self.ontrack(trackEvent); - }, 0); + 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; + }; - // check whether addIceCandidate({}) was called within four seconds after - // setRemoteDescription. - window.setTimeout(function() { - if (!(self && self.transceivers)) { - return; - } - self.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({}); + var shimConstraints_ = function(constraints, func) { + 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]; } - }); - }, 4000); + }; + 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 (arguments.length > 1 && typeof arguments[1] === 'function') { - window.setTimeout(arguments[1], 0); + 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); } - return Promise.resolve(); + logging('chrome: ' + JSON.stringify(constraints)); + return func(constraints); }; - 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(); + var shimError_ = function(e) { + return { + name: { + PermissionDeniedError: 'NotAllowedError', + InvalidStateError: 'NotReadableError', + DevicesNotFoundError: 'NotFoundError', + ConstraintNotSatisfiedError: 'OverconstrainedError', + TrackStartError: 'NotReadableError', + MediaDeviceFailedDueToShutdown: 'NotReadableError', + MediaDeviceKillSwitchOn: 'NotReadableError' + }[e.name] || e.name, + message: e.message, + 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)); + } + }); }); - // FIXME: clean up tracks, local streams, remote streams, etc - this._updateSignalingState('closed'); }; - // Update the signaling state. - RTCPeerConnection.prototype._updateSignalingState = function(newState) { - this.signalingState = newState; - var event = new Event('signalingstatechange'); - this.dispatchEvent(event); - if (this.onsignalingstatechange !== null) { - this.onsignalingstatechange(event); - } + 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); + }); }; - // Determine whether to fire the negotiationneeded event. - RTCPeerConnection.prototype._maybeFireNegotiationNeeded = function() { - var self = this; - if (this.signalingState !== 'stable' || this.needNegotiation === true) { - return; - } - this.needNegotiation = true; - window.setTimeout(function() { - if (self.needNegotiation === false) { - return; - } - self.needNegotiation = false; - var event = new Event('negotiationneeded'); - self.dispatchEvent(event); - if (self.onnegotiationneeded !== null) { - self.onnegotiationneeded(event); + 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 + }; } - }, 0); - }; + }; + } + + // 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)); + }); + }); + }; + } - // Update the connection state. - RTCPeerConnection.prototype._updateConnectionState = function() { - var self = this; - var newState; - var states = { - 'new': 0, - closed: 0, - connecting: 0, - checking: 0, - connected: 0, - completed: 0, - disconnected: 0, - failed: 0 + // 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.'); }; - 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; + } + if (typeof navigator.mediaDevices.removeEventListener === 'undefined') { + navigator.mediaDevices.removeEventListener = function() { + logging('Dummy mediaDevices.removeEventListener called.'); + }; + } +}; - newState = 'new'; - if (states.failed > 0) { - newState = 'failed'; - } else if (states.connecting > 0 || states.checking > 0) { - newState = 'connecting'; - } else if (states.disconnected > 0) { - newState = 'disconnected'; - } else if (states.new > 0) { - newState = 'new'; - } else if (states.connected > 0 || states.completed > 0) { - newState = 'connected'; - } +},{"../utils.js":13}],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'; - if (newState !== self.iceConnectionState) { - self.iceConnectionState = newState; - var event = new Event('iceconnectionstatechange'); - this.dispatchEvent(event); - if (this.oniceconnectionstatechange !== null) { - this.oniceconnectionstatechange(event); - } +var SDPUtils = require('sdp'); +var utils = require('./utils'); + +// Wraps the peerconnection event eventNameToWrap in a function +// which returns the modified event object. +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) { + cb(wrapper(e)); + }; + this._eventMap = this._eventMap || {}; + this._eventMap[cb] = wrappedCallback; + return nativeAddEventListener.apply(this, [nativeEventName, + wrappedCallback]); }; - RTCPeerConnection.prototype.createOffer = function() { - var self = this; - if (this._pendingOffer) { - throw new Error('createOffer called while there is a pending offer.'); - } - var offerOptions; - if (arguments.length === 1 && typeof arguments[0] !== 'function') { - offerOptions = arguments[0]; - } else if (arguments.length === 3) { - offerOptions = arguments[2]; + 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]); + }; - var numAudioTracks = this.transceivers.filter(function(t) { - return t.kind === 'audio'; - }).length; - var numVideoTracks = this.transceivers.filter(function(t) { - return t.kind === 'video'; - }).length; - - // Determine number of audio and video tracks we need to send/recv. - 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; - } + 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 (offerOptions.offerToReceiveVideo !== undefined) { - if (offerOptions.offerToReceiveVideo === true) { - numVideoTracks = 1; - } else if (offerOptions.offerToReceiveVideo === false) { - numVideoTracks = 0; - } else { - numVideoTracks = offerOptions.offerToReceiveVideo; - } + if (cb) { + this.addEventListener(eventNameToWrap, + this['_on' + eventNameToWrap] = cb); } } + }); +} - this.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) { - this._createTransceiver('audio'); - numAudioTracks--; - } - if (numVideoTracks > 0) { - this._createTransceiver('video'); - numVideoTracks--; - } +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 && 'foundation' in + window.RTCIceCandidate.prototype) { + return; } - // reorder tracks - var transceivers = sortTracks(this.transceivers); - - var sdp = SDPUtils.writeSessionBoilerplate(this._sdpSessionId); - 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 = SDPUtils.generateIdentifier(); - transceiver.mid = mid; - if (!transceiver.iceGatherer) { - transceiver.iceGatherer = self.usingBundle && sdpMLineIndex > 0 ? - transceivers[0].iceGatherer : - self._createIceGatherer(mid, sdpMLineIndex); + 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); } - 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'; - } - }); + // 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); - // generate an ssrc now, to be used later in rtpSender.send - var sendEncodingParameters = [{ - ssrc: (2 * sdpMLineIndex + 1) * 1001 - }]; - if (track) { - // add RTX - if (edgeVersion >= 15019 && kind === 'video') { - sendEncodingParameters[0].rtx = { - ssrc: (2 * sdpMLineIndex + 1) * 1001 + 1 - }; - } - } + // 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; + }; - if (transceiver.wantReceive) { - transceiver.rtpReceiver = new window.RTCRtpReceiver( - transceiver.dtlsTransport, - kind - ); + // Hook up the augmented candidate in onicecandidate and + // addEventListener('icecandidate', ...) + wrapPeerConnectionEvent(window, 'icecandidate', function(e) { + if (e.candidate) { + Object.defineProperty(e, 'candidate', { + value: new window.RTCIceCandidate(e.candidate), + writable: 'false' + }); } - - transceiver.localCapabilities = localCapabilities; - transceiver.sendEncodingParameters = sendEncodingParameters; + return e; }); + }, - // always offer BUNDLE and dispose on return if not supported. - if (this._config.bundlePolicy !== 'max-compat') { - sdp += 'a=group:BUNDLE ' + transceivers.map(function(t) { - return t.mid; - }).join(' ') + '\r\n'; - } - sdp += 'a=ice-options:trickle\r\n'; + // shimCreateObjectURL must be called before shimSourceObject to avoid loop. - transceivers.forEach(function(transceiver, sdpMLineIndex) { - sdp += SDPUtils.writeMediaSection(transceiver, - transceiver.localCapabilities, 'offer', transceiver.stream); - sdp += 'a=rtcp-rsize\r\n'; - }); + shimCreateObjectURL: function(window) { + var URL = window && window.URL; - this._pendingOffer = transceivers; - var desc = new window.RTCSessionDescription({ - type: 'offer', - sdp: sdp - }); - if (arguments.length && typeof arguments[0] === 'function') { - window.setTimeout(arguments[0], 0, desc); + 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; } - return Promise.resolve(desc); - }; - RTCPeerConnection.prototype.createAnswer = function() { - var sdp = SDPUtils.writeSessionBoilerplate(this._sdpSessionId); - if (this.usingBundle) { - sdp += 'a=group:BUNDLE ' + this.transceivers.map(function(t) { - return t.mid; - }).join(' ') + '\r\n'; - } - this.transceivers.forEach(function(transceiver, sdpMLineIndex) { - if (transceiver.isDatachannel) { - sdp += 'm=application 0 DTLS/SCTP 5000\r\n' + - 'c=IN IP4 0.0.0.0\r\n' + - 'a=mid:' + transceiver.mid + '\r\n'; - return; - } + var nativeCreateObjectURL = URL.createObjectURL.bind(URL); + var nativeRevokeObjectURL = URL.revokeObjectURL.bind(URL); + var streams = new Map(), newId = 0; - // 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 = { - ssrc: (2 * sdpMLineIndex + 2) * 1001 + 1 - }; - } - } + 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); + }; - // 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; + 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]); } + }); - sdp += SDPUtils.writeMediaSection(transceiver, commonCapabilities, - 'answer', transceiver.stream); - if (transceiver.rtcpParameters && - transceiver.rtcpParameters.reducedSize) { - sdp += 'a=rtcp-rsize\r\n'; + 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); + }; + } +}; - var desc = new window.RTCSessionDescription({ - type: 'answer', - sdp: sdp - }); - if (arguments.length && typeof arguments[0] === 'function') { - window.setTimeout(arguments[0], 0, desc); - } - return Promise.resolve(desc); - }; +},{"./utils":13,"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'; - RTCPeerConnection.prototype.addIceCandidate = function(candidate) { - if (!candidate) { - for (var j = 0; j < this.transceivers.length; j++) { - this.transceivers[j].iceTransport.addRemoteCandidate({}); - if (this.usingBundle) { - return Promise.resolve(); - } +var utils = require('../utils'); +var shimRTCPeerConnection = require('rtcpeerconnection-shim'); + +module.exports = { + shimGetUserMedia: require('./getusermedia'), + shimPeerConnection: function(window) { + var browserDetails = utils.detectBrowser(window); + + if (window.RTCIceGatherer) { + // ORTC defines an RTCIceCandidate object but no constructor. + // Not implemented in Edge. + if (!window.RTCIceCandidate) { + window.RTCIceCandidate = function(args) { + return args; + }; } - } else { - var mLineIndex = candidate.sdpMLineIndex; - if (candidate.sdpMid) { - for (var i = 0; i < this.transceivers.length; i++) { - if (this.transceivers[i].mid === candidate.sdpMid) { - mLineIndex = i; - break; - } - } + // ORTC does not have a session description object but + // other browsers (i.e. Chrome) that will support both PC and ORTC + // in the future might have this defined already. + if (!window.RTCSessionDescription) { + window.RTCSessionDescription = function(args) { + return args; + }; } - var transceiver = this.transceivers[mLineIndex]; - if (transceiver) { - 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 Promise.resolve(); - } - // Ignore RTCP candidates, we assume RTCP-MUX. - if (cand.component && - !(cand.component === '1' || cand.component === 1)) { - return Promise.resolve(); - } - transceiver.iceTransport.addRemoteCandidate(cand); - - // update the remoteDescription. - var sections = SDPUtils.splitSections(this.remoteDescription.sdp); - sections[mLineIndex + 1] += (cand.type ? candidate.candidate.trim() - : 'a=end-of-candidates') + '\r\n'; - this.remoteDescription.sdp = sections.join(''); + // 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); + } + }); } } - if (arguments.length > 1 && typeof arguments[1] === 'function') { - window.setTimeout(arguments[1], 0); - } - return Promise.resolve(); - }; - RTCPeerConnection.prototype.getStats = function() { - var promises = []; - this.transceivers.forEach(function(transceiver) { - ['rtpSender', 'rtpReceiver', 'iceGatherer', 'iceTransport', - 'dtlsTransport'].forEach(function(method) { - if (transceiver[method]) { - promises.push(transceiver[method].getStats()); + // 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; + } } - }); - }); - var cb = arguments.length > 1 && typeof arguments[1] === 'function' && - arguments[1]; - var fixStatsType = function(stat) { - return { - inboundrtp: 'inbound-rtp', - outboundrtp: 'outbound-rtp', - candidatepair: 'candidate-pair', - localcandidate: 'local-candidate', - remotecandidate: 'remote-candidate' - }[stat.type] || stat.type; - }; - return new Promise(function(resolve) { - // shim getStats with maplike support - var results = new Map(); - Promise.all(promises).then(function(res) { - res.forEach(function(result) { - Object.keys(result).forEach(function(id) { - result[id].type = fixStatsType(result[id]); - results.set(id, result[id]); - }); - }); - if (cb) { - window.setTimeout(cb, 0, results); + return this._dtmf; } - resolve(results); }); + } + + window.RTCPeerConnection = + shimRTCPeerConnection(window, browserDetails.version); + }, + 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":13,"./getusermedia":9,"rtcpeerconnection-shim":1}],9:[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)); }); }; - return RTCPeerConnection; }; -},{"sdp":1}],9:[function(require,module,exports){ +},{}],10:[function(require,module,exports){ /* * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. * @@ -2975,6 +3599,7 @@ var firefoxShim = { 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)); @@ -2982,6 +3607,15 @@ var firefoxShim = { } }); } + 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) { @@ -3143,7 +3777,7 @@ module.exports = { shimGetUserMedia: require('./getusermedia') }; -},{"../utils":12,"./getusermedia":10}],10:[function(require,module,exports){ +},{"../utils":13,"./getusermedia":11}],11:[function(require,module,exports){ /* * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. * @@ -3348,13 +3982,13 @@ module.exports = function(window) { return getUserMedia_(constraints, onSuccess, onError); } // Replace Firefox 44+'s deprecation warning with unprefixed version. - console.warn('navigator.getUserMedia has been replaced by ' + - 'navigator.mediaDevices.getUserMedia'); + utils.deprecated('navigator.getUserMedia', + 'navigator.mediaDevices.getUserMedia'); navigator.mediaDevices.getUserMedia(constraints).then(onSuccess, onError); }; }; -},{"../utils":12}],11:[function(require,module,exports){ +},{"../utils":13}],12:[function(require,module,exports){ /* * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. * @@ -3588,11 +4222,66 @@ var safariShim = { }; window.RTCPeerConnection.prototype = OrigPeerConnection.prototype; // wrap static methods. Currently just generateCertificate. - Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', { - get: function() { - return OrigPeerConnection.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) { + 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') { + audioTransceiver.setDirection('sendonly'); + } else if (audioTransceiver.direction === 'recvonly') { + audioTransceiver.setDirection('inactive'); + } + } else if (offerOptions.offerToReceiveAudio === true && + !audioTransceiver) { + pc.addTransceiver('audio'); + } + + 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); + }; } }; @@ -3602,12 +4291,14 @@ module.exports = { shimLocalStreamsAPI: safariShim.shimLocalStreamsAPI, shimRemoteStreamsAPI: safariShim.shimRemoteStreamsAPI, shimGetUserMedia: safariShim.shimGetUserMedia, - shimRTCIceServerUrls: safariShim.shimRTCIceServerUrls + shimRTCIceServerUrls: safariShim.shimRTCIceServerUrls, + shimTrackEventTransceiver: safariShim.shimTrackEventTransceiver, + shimCreateOfferLegacy: safariShim.shimCreateOfferLegacy // TODO // shimPeerConnection: safariShim.shimPeerConnection }; -},{"../utils":12}],12:[function(require,module,exports){ +},{"../utils":13}],13:[function(require,module,exports){ /* * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. * @@ -3742,57 +4433,6 @@ var utils = { return result; }, - // 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)) { - // 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); - }; - } }; // Export. @@ -3806,5 +4446,5 @@ module.exports = { detectBrowser: utils.detectBrowser.bind(utils) }; -},{}]},{},[2])(2) -}); \ No newline at end of file +},{}]},{},[3])(3) +}); diff --git a/erizo_controller/erizoClient/src/Connection.js b/erizo_controller/erizoClient/src/Connection.js index 90f6372a83..d981f58ca8 100644 --- a/erizo_controller/erizoClient/src/Connection.js +++ b/erizo_controller/erizoClient/src/Connection.js @@ -43,8 +43,8 @@ const buildConnection = (specInput) => { Logger.debug('Firefox Stack'); that = FirefoxStack(spec); } else if (that.browser === 'safari') { - Logger.debug('Safari using Firefox Stack'); - that = FirefoxStack(spec); + Logger.debug('Safari using Chrome Stable Stack'); + that = ChromeStableStack(spec); } else if (that.browser === 'chrome-stable' || that.browser === 'electron') { Logger.debug('Chrome Stable Stack'); that = ChromeStableStack(spec);