444 lines
16 KiB
JavaScript
444 lines
16 KiB
JavaScript
/* global $, config, mozRTCPeerConnection, RTCPeerConnection,
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webkitRTCPeerConnection, RTCSessionDescription */
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/* jshint -W101 */
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var RTC = require('../RTC/RTC');
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var RTCBrowserType = require("../RTC/RTCBrowserType.js");
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var XMPPEvents = require("../../service/xmpp/XMPPEvents");
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var SSRCReplacement = require("./LocalSSRCReplacement");
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function TraceablePeerConnection(ice_config, constraints, session) {
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var self = this;
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var RTCPeerConnectionType = null;
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if (RTCBrowserType.isFirefox()) {
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RTCPeerConnectionType = mozRTCPeerConnection;
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} else if (RTCBrowserType.isTemasysPluginUsed()) {
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RTCPeerConnectionType = RTCPeerConnection;
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} else {
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RTCPeerConnectionType = webkitRTCPeerConnection;
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}
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this.peerconnection = new RTCPeerConnectionType(ice_config, constraints);
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this.updateLog = [];
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this.stats = {};
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this.statsinterval = null;
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this.maxstats = 0; // limit to 300 values, i.e. 5 minutes; set to 0 to disable
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var Interop = require('sdp-interop').Interop;
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this.interop = new Interop();
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var Simulcast = require('sdp-simulcast');
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this.simulcast = new Simulcast({numOfLayers: 3, explodeRemoteSimulcast: false});
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// override as desired
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this.trace = function (what, info) {
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/*console.warn('WTRACE', what, info);
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if (info && RTCBrowserType.isIExplorer()) {
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if (info.length > 1024) {
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console.warn('WTRACE', what, info.substr(1024));
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}
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if (info.length > 2048) {
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console.warn('WTRACE', what, info.substr(2048));
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}
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}*/
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self.updateLog.push({
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time: new Date(),
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type: what,
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value: info || ""
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});
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};
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this.onicecandidate = null;
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this.peerconnection.onicecandidate = function (event) {
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// FIXME: this causes stack overflow with Temasys Plugin
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if (!RTCBrowserType.isTemasysPluginUsed())
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self.trace('onicecandidate', JSON.stringify(event.candidate, null, ' '));
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if (self.onicecandidate !== null) {
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self.onicecandidate(event);
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}
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};
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this.onaddstream = null;
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this.peerconnection.onaddstream = function (event) {
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self.trace('onaddstream', event.stream.id);
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if (self.onaddstream !== null) {
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self.onaddstream(event);
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}
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};
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this.onremovestream = null;
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this.peerconnection.onremovestream = function (event) {
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self.trace('onremovestream', event.stream.id);
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if (self.onremovestream !== null) {
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self.onremovestream(event);
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}
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};
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this.onsignalingstatechange = null;
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this.peerconnection.onsignalingstatechange = function (event) {
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self.trace('onsignalingstatechange', self.signalingState);
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if (self.onsignalingstatechange !== null) {
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self.onsignalingstatechange(event);
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}
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};
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this.oniceconnectionstatechange = null;
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this.peerconnection.oniceconnectionstatechange = function (event) {
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self.trace('oniceconnectionstatechange', self.iceConnectionState);
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if (self.oniceconnectionstatechange !== null) {
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self.oniceconnectionstatechange(event);
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}
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};
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this.onnegotiationneeded = null;
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this.peerconnection.onnegotiationneeded = function (event) {
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self.trace('onnegotiationneeded');
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if (self.onnegotiationneeded !== null) {
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self.onnegotiationneeded(event);
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}
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};
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self.ondatachannel = null;
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this.peerconnection.ondatachannel = function (event) {
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self.trace('ondatachannel', event);
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if (self.ondatachannel !== null) {
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self.ondatachannel(event);
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}
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};
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// XXX: do all non-firefox browsers which we support also support this?
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if (!RTCBrowserType.isFirefox() && this.maxstats) {
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this.statsinterval = window.setInterval(function() {
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self.peerconnection.getStats(function(stats) {
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var results = stats.result();
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var now = new Date();
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for (var i = 0; i < results.length; ++i) {
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results[i].names().forEach(function (name) {
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var id = results[i].id + '-' + name;
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if (!self.stats[id]) {
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self.stats[id] = {
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startTime: now,
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endTime: now,
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values: [],
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times: []
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};
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}
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self.stats[id].values.push(results[i].stat(name));
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self.stats[id].times.push(now.getTime());
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if (self.stats[id].values.length > self.maxstats) {
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self.stats[id].values.shift();
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self.stats[id].times.shift();
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}
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self.stats[id].endTime = now;
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});
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}
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});
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}, 1000);
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}
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}
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/**
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* Returns a string representation of a SessionDescription object.
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*/
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var dumpSDP = function(description) {
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if (typeof description === 'undefined' || description === null) {
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return '';
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}
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return 'type: ' + description.type + '\r\n' + description.sdp;
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};
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/**
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* Takes a SessionDescription object and returns a "normalized" version.
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* Currently it only takes care of ordering the a=ssrc lines.
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*/
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var normalizePlanB = function(desc) {
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if (typeof desc !== 'object' || desc === null ||
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typeof desc.sdp !== 'string') {
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console.warn('An empty description was passed as an argument.');
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return desc;
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}
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var transform = require('sdp-transform');
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var session = transform.parse(desc.sdp);
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if (typeof session !== 'undefined' && typeof session.media !== 'undefined' &&
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Array.isArray(session.media)) {
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session.media.forEach(function (mLine) {
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// Chrome appears to be picky about the order in which a=ssrc lines
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// are listed in an m-line when rtx is enabled (and thus there are
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// a=ssrc-group lines with FID semantics). Specifically if we have
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// "a=ssrc-group:FID S1 S2" and the "a=ssrc:S2" lines appear before
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// the "a=ssrc:S1" lines, SRD fails.
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// So, put SSRC which appear as the first SSRC in an FID ssrc-group
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// first.
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var firstSsrcs = [];
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var newSsrcLines = [];
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if (typeof mLine.ssrcGroups !== 'undefined' && Array.isArray(mLine.ssrcGroups)) {
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mLine.ssrcGroups.forEach(function (group) {
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if (typeof group.semantics !== 'undefined' &&
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group.semantics === 'FID') {
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if (typeof group.ssrcs !== 'undefined') {
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firstSsrcs.push(Number(group.ssrcs.split(' ')[0]));
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}
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}
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});
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}
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if (typeof mLine.ssrcs !== 'undefined' && Array.isArray(mLine.ssrcs)) {
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var i;
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for (i = 0; i<mLine.ssrcs.length; i++){
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if (typeof mLine.ssrcs[i] === 'object'
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&& typeof mLine.ssrcs[i].id !== 'undefined'
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&& !$.inArray(mLine.ssrcs[i].id, firstSsrcs)) {
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newSsrcLines.push(mLine.ssrcs[i]);
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delete mLine.ssrcs[i];
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}
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}
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for (i = 0; i<mLine.ssrcs.length; i++){
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if (typeof mLine.ssrcs[i] !== 'undefined') {
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newSsrcLines.push(mLine.ssrcs[i]);
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}
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}
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mLine.ssrcs = newSsrcLines;
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}
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});
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}
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var resStr = transform.write(session);
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return new RTCSessionDescription({
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type: desc.type,
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sdp: resStr
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});
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};
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if (TraceablePeerConnection.prototype.__defineGetter__ !== undefined) {
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TraceablePeerConnection.prototype.__defineGetter__(
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'signalingState',
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function() { return this.peerconnection.signalingState; });
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TraceablePeerConnection.prototype.__defineGetter__(
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'iceConnectionState',
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function() { return this.peerconnection.iceConnectionState; });
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TraceablePeerConnection.prototype.__defineGetter__(
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'localDescription',
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function() {
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var desc = this.peerconnection.localDescription;
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desc = SSRCReplacement.mungeLocalVideoSSRC(desc);
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this.trace('getLocalDescription::preTransform', dumpSDP(desc));
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// if we're running on FF, transform to Plan B first.
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if (RTCBrowserType.usesUnifiedPlan()) {
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desc = this.interop.toPlanB(desc);
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this.trace('getLocalDescription::postTransform (Plan B)', dumpSDP(desc));
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}
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return desc;
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});
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TraceablePeerConnection.prototype.__defineGetter__(
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'remoteDescription',
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function() {
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var desc = this.peerconnection.remoteDescription;
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this.trace('getRemoteDescription::preTransform', dumpSDP(desc));
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// if we're running on FF, transform to Plan B first.
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if (RTCBrowserType.usesUnifiedPlan()) {
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desc = this.interop.toPlanB(desc);
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this.trace('getRemoteDescription::postTransform (Plan B)', dumpSDP(desc));
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}
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return desc;
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});
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}
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TraceablePeerConnection.prototype.addStream = function (stream) {
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this.trace('addStream', stream.id);
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try
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{
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this.peerconnection.addStream(stream);
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}
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catch (e)
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{
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console.error(e);
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}
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};
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TraceablePeerConnection.prototype.removeStream = function (stream, stopStreams) {
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this.trace('removeStream', stream.id);
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if(stopStreams) {
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RTC.stopMediaStream(stream);
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}
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try {
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// FF doesn't support this yet.
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if (this.peerconnection.removeStream)
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this.peerconnection.removeStream(stream);
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} catch (e) {
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console.error(e);
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}
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};
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TraceablePeerConnection.prototype.createDataChannel = function (label, opts) {
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this.trace('createDataChannel', label, opts);
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return this.peerconnection.createDataChannel(label, opts);
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};
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TraceablePeerConnection.prototype.setLocalDescription
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= function (description, successCallback, failureCallback) {
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this.trace('setLocalDescription::preTransform', dumpSDP(description));
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// if we're running on FF, transform to Plan A first.
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if (RTCBrowserType.usesUnifiedPlan()) {
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description = this.interop.toUnifiedPlan(description);
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this.trace('setLocalDescription::postTransform (Plan A)', dumpSDP(description));
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}
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var self = this;
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this.peerconnection.setLocalDescription(description,
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function () {
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self.trace('setLocalDescriptionOnSuccess');
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successCallback();
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},
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function (err) {
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self.trace('setLocalDescriptionOnFailure', err);
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failureCallback(err);
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}
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);
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/*
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if (this.statsinterval === null && this.maxstats > 0) {
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// start gathering stats
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}
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*/
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};
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TraceablePeerConnection.prototype.setRemoteDescription
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= function (description, successCallback, failureCallback) {
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this.trace('setRemoteDescription::preTransform', dumpSDP(description));
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// TODO the focus should squeze or explode the remote simulcast
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description = this.simulcast.mungeRemoteDescription(description);
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this.trace('setRemoteDescription::postTransform (simulcast)', dumpSDP(description));
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// if we're running on FF, transform to Plan A first.
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if (RTCBrowserType.usesUnifiedPlan()) {
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description = this.interop.toUnifiedPlan(description);
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this.trace('setRemoteDescription::postTransform (Plan A)', dumpSDP(description));
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}
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if (RTCBrowserType.usesPlanB()) {
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description = normalizePlanB(description);
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}
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var self = this;
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this.peerconnection.setRemoteDescription(description,
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function () {
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self.trace('setRemoteDescriptionOnSuccess');
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successCallback();
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},
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function (err) {
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self.trace('setRemoteDescriptionOnFailure', err);
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failureCallback(err);
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}
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);
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/*
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if (this.statsinterval === null && this.maxstats > 0) {
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// start gathering stats
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}
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*/
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};
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TraceablePeerConnection.prototype.close = function () {
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this.trace('stop');
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if (this.statsinterval !== null) {
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window.clearInterval(this.statsinterval);
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this.statsinterval = null;
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}
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this.peerconnection.close();
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};
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TraceablePeerConnection.prototype.createOffer
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= function (successCallback, failureCallback, constraints) {
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var self = this;
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this.trace('createOffer', JSON.stringify(constraints, null, ' '));
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this.peerconnection.createOffer(
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function (offer) {
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self.trace('createOfferOnSuccess::preTransform', dumpSDP(offer));
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// NOTE this is not tested because in meet the focus generates the
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// offer.
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// if we're running on FF, transform to Plan B first.
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if (RTCBrowserType.usesUnifiedPlan()) {
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offer = self.interop.toPlanB(offer);
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self.trace('createOfferOnSuccess::postTransform (Plan B)', dumpSDP(offer));
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}
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offer = SSRCReplacement.mungeLocalVideoSSRC(offer);
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if (config.enableSimulcast && self.simulcast.isSupported()) {
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offer = self.simulcast.mungeLocalDescription(offer);
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self.trace('createOfferOnSuccess::postTransform (simulcast)', dumpSDP(offer));
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}
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successCallback(offer);
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},
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function(err) {
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self.trace('createOfferOnFailure', err);
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failureCallback(err);
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},
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constraints
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);
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};
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TraceablePeerConnection.prototype.createAnswer
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= function (successCallback, failureCallback, constraints) {
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var self = this;
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this.trace('createAnswer', JSON.stringify(constraints, null, ' '));
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this.peerconnection.createAnswer(
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function (answer) {
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self.trace('createAnswerOnSuccess::preTransform', dumpSDP(answer));
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// if we're running on FF, transform to Plan A first.
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if (RTCBrowserType.usesUnifiedPlan()) {
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answer = self.interop.toPlanB(answer);
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self.trace('createAnswerOnSuccess::postTransform (Plan B)', dumpSDP(answer));
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}
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// munge local video SSRC
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answer = SSRCReplacement.mungeLocalVideoSSRC(answer);
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if (config.enableSimulcast && self.simulcast.isSupported()) {
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answer = self.simulcast.mungeLocalDescription(answer);
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self.trace('createAnswerOnSuccess::postTransform (simulcast)', dumpSDP(answer));
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}
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successCallback(answer);
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},
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function(err) {
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self.trace('createAnswerOnFailure', err);
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failureCallback(err);
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},
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constraints
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);
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};
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TraceablePeerConnection.prototype.addIceCandidate
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= function (candidate, successCallback, failureCallback) {
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//var self = this;
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this.trace('addIceCandidate', JSON.stringify(candidate, null, ' '));
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this.peerconnection.addIceCandidate(candidate);
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/* maybe later
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this.peerconnection.addIceCandidate(candidate,
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function () {
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self.trace('addIceCandidateOnSuccess');
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successCallback();
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},
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function (err) {
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self.trace('addIceCandidateOnFailure', err);
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failureCallback(err);
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}
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);
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*/
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};
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TraceablePeerConnection.prototype.getStats = function(callback, errback) {
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// TODO: Is this the correct way to handle Opera, Temasys?
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if (RTCBrowserType.isFirefox()) {
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// ignore for now...
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if(!errback)
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errback = function () {};
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this.peerconnection.getStats(null, callback, errback);
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} else {
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this.peerconnection.getStats(callback);
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}
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};
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module.exports = TraceablePeerConnection;
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