Implements first version of adaptive simulcast.
This commit is contained in:
George Politis
parent
555bdd7af5
commit
36af4da83d
17
app.js
17
app.js
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@ -279,7 +279,10 @@ function waitForPresence(data, sid) {
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var ssrclines
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= SDPUtil.find_lines(sess.peerconnection.remoteDescription.sdp, 'a=ssrc:');
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ssrclines = ssrclines.filter(function (line) {
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return line.indexOf('mslabel:' + data.stream.label) !== -1;
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// NOTE(gp) previously we filtered on the mslabel, but that property
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// is not always present.
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// return line.indexOf('mslabel:' + data.stream.label) !== -1;
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return line.indexOf('msid:' + data.stream.id) !== -1;
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});
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if (ssrclines.length) {
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thessrc = ssrclines[0].substring(7).split(' ')[0];
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@ -292,6 +295,7 @@ function waitForPresence(data, sid) {
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// presence to arrive.
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if (!ssrc2jid[thessrc]) {
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// TODO(gp) limit wait duration to 1 sec.
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setTimeout(function(d, s) {
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return function() {
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waitForPresence(d, s);
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@ -1418,6 +1422,17 @@ $(document).bind('fatalError.jingle',
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}
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);
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$(document).bind("video.selected", function(event, isPresentation, userJid) {
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if (!isPresentation && _dataChannels && _dataChannels.length != 0) {
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_dataChannels[0].send(JSON.stringify({
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'colibriClass': 'SelectedEndpointChangedEvent',
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'selectedEndpoint': (isPresentation || !userJid)
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// TODO(gp) hmm.. I wonder which one of the Strophe methods to use..
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? null : userJid.split('/')[1]
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}));
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}
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});
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function callSipButtonClicked()
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{
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$.prompt('<h2>Enter SIP number</h2>' +
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@ -23,6 +23,10 @@ function onDataChannel(event)
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//dataChannel.send("Hello bridge!");
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// Sends 12 bytes binary message to the bridge
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//dataChannel.send(new ArrayBuffer(12));
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// TODO(gp) we are supposed to tell the bridge about video selections
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// so that it can do adaptive simulcast, What if a video selection has
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// been made while the data channels are down or broken?
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};
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dataChannel.onerror = function (error)
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@ -89,6 +93,16 @@ function onDataChannel(event)
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var endpointSimulcastLayers = obj.endpointSimulcastLayers;
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$(document).trigger('simulcastlayerschanged', [endpointSimulcastLayers]);
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}
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else if ("StartSimulcastLayerEvent" === colibriClass)
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{
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var simulcastLayer = obj.simulcastLayer;
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$(document).trigger('startsimulcastlayer', simulcastLayer);
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}
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else if ("StopSimulcastLayerEvent" === colibriClass)
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{
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var simulcastLayer = obj.simulcastLayer;
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$(document).trigger('stopsimulcastlayer', simulcastLayer);
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}
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else
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{
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console.debug("Data channel JSON-formatted message: ", obj);
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@ -530,7 +530,7 @@ ColibriFocus.prototype.createdConference = function (result) {
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bridgeSDP.raw = bridgeSDP.session + bridgeSDP.media.join('');
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var bridgeDesc = new RTCSessionDescription({type: 'offer', sdp: bridgeSDP.raw});
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var simulcast = new Simulcast();
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var bridgeDesc = simulcast.transformBridgeDescription(bridgeDesc);
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var bridgeDesc = simulcast.transformRemoteDescription(bridgeDesc);
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this.peerconnection.setRemoteDescription(bridgeDesc,
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function () {
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@ -130,10 +130,14 @@ if (TraceablePeerConnection.prototype.__defineGetter__ !== undefined) {
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TraceablePeerConnection.prototype.__defineGetter__('iceConnectionState', function() { return this.peerconnection.iceConnectionState; });
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TraceablePeerConnection.prototype.__defineGetter__('localDescription', function() {
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var simulcast = new Simulcast();
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var publicLocalDescription = simulcast.makeLocalDescriptionPublic(this.peerconnection.localDescription);
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var publicLocalDescription = simulcast.reverseTransformLocalDescription(this.peerconnection.localDescription);
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return publicLocalDescription;
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});
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TraceablePeerConnection.prototype.__defineGetter__('remoteDescription', function() { return this.peerconnection.remoteDescription; });
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TraceablePeerConnection.prototype.__defineGetter__('remoteDescription', function() {
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var simulcast = new Simulcast();
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var publicRemoteDescription = simulcast.reverseTransformRemoteDescription(this.peerconnection.remoteDescription);
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return publicRemoteDescription;
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});
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}
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TraceablePeerConnection.prototype.addStream = function (stream) {
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@ -120,7 +120,7 @@ JingleSession.prototype.accept = function () {
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pranswer.sdp = pranswer.sdp.replace('a=inactive', 'a=sendrecv');
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}
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var simulcast = new Simulcast();
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pranswer = simulcast.makeLocalDescriptionPublic(pranswer);
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pranswer = simulcast.reverseTransformLocalDescription(pranswer);
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var prsdp = new SDP(pranswer.sdp);
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var accept = $iq({to: this.peerjid,
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type: 'set'})
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@ -568,7 +568,7 @@ JingleSession.prototype.createdAnswer = function (sdp, provisional) {
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responder: this.responder,
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sid: this.sid });
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var simulcast = new Simulcast();
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var publicLocalDesc = simulcast.makeLocalDescriptionPublic(sdp);
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var publicLocalDesc = simulcast.reverseTransformLocalDescription(sdp);
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var publicLocalSDP = new SDP(publicLocalDesc.sdp);
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publicLocalSDP.toJingle(accept, this.initiator == this.me ? 'initiator' : 'responder');
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this.connection.sendIQ(accept,
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246
simulcast.js
246
simulcast.js
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@ -15,7 +15,7 @@ function Simulcast() {
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"use strict";
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// global state for all transformers.
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var localExplosionMap = {}, localVideoSourceCache, emptyCompoundIndex,
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remoteMaps = {
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remoteVideoSourceCache, remoteMaps = {
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msid2Quality: {},
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ssrc2Msid: {},
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receivingVideoStreams: {}
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@ -45,6 +45,14 @@ function Simulcast() {
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this._replaceVideoSources(lines, localVideoSourceCache);
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};
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Simulcast.prototype._cacheRemoteVideoSources = function (lines) {
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remoteVideoSourceCache = this._getVideoSources(lines);
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};
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Simulcast.prototype._restoreRemoteVideoSources = function (lines) {
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this._replaceVideoSources(lines, remoteVideoSourceCache);
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};
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Simulcast.prototype._replaceVideoSources = function (lines, videoSources) {
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var i, inVideo = false, index = -1, howMany = 0;
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@ -216,6 +224,12 @@ function Simulcast() {
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}
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};
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/**
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* Produces a single stream with multiple tracks for local video sources.
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*
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* @param lines
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* @private
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*/
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Simulcast.prototype._explodeLocalSimulcastSources = function (lines) {
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var sb, msid, sid, tid, videoSources, self;
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@ -259,6 +273,12 @@ function Simulcast() {
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this._replaceVideoSources(lines, sb);
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};
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/**
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* Groups local video sources together in the ssrc-group:SIM group.
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*
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* @param lines
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* @private
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*/
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Simulcast.prototype._groupLocalVideoSources = function (lines) {
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var sb, videoSources, ssrcs = [], ssrc;
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@ -401,6 +421,13 @@ function Simulcast() {
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return sb;
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};
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/**
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* Ensures that the simulcast group is present in the answer, _if_ native
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* simulcast is enabled,
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*
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* @param desc
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* @returns {*}
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*/
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Simulcast.prototype.transformAnswer = function (desc) {
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if (config.enableSimulcast && config.useNativeSimulcast) {
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@ -429,11 +456,53 @@ function Simulcast() {
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return desc;
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};
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Simulcast.prototype.makeLocalDescriptionPublic = function (desc) {
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Simulcast.prototype._restoreSimulcastGroups = function (sb) {
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this._restoreRemoteVideoSources(sb);
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};
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/**
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* Restores the simulcast groups of the remote description. In
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* transformRemoteDescription we remove those in order for the set remote
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* description to succeed. The focus needs the signal the groups to new
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* participants.
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*
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* @param desc
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* @returns {*}
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*/
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Simulcast.prototype.reverseTransformRemoteDescription = function (desc) {
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var sb;
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if (!desc || desc == null)
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if (!desc || desc == null) {
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return desc;
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}
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if (config.enableSimulcast) {
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sb = desc.sdp.split('\r\n');
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this._restoreSimulcastGroups(sb);
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desc = new RTCSessionDescription({
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type: desc.type,
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sdp: sb.join('\r\n')
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});
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}
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return desc;
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};
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/**
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* Prepares the local description for public usage (i.e. to be signaled
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* through Jingle to the focus).
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*
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* @param desc
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* @returns {RTCSessionDescription}
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*/
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Simulcast.prototype.reverseTransformLocalDescription = function (desc) {
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var sb;
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if (!desc || desc == null) {
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return desc;
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}
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if (config.enableSimulcast) {
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@ -480,30 +549,16 @@ function Simulcast() {
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this._replaceVideoSources(lines, sb);
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};
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Simulcast.prototype.transformBridgeDescription = function (desc) {
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if (config.enableSimulcast && config.useNativeSimulcast) {
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var sb = desc.sdp.split('\r\n');
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this._ensureGoogConference(sb);
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desc = new RTCSessionDescription({
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type: desc.type,
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sdp: sb.join('\r\n')
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});
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if (this.debugLvl && this.debugLvl > 1) {
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console.info('Transformed bridge description');
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console.info(desc.sdp);
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}
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}
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return desc;
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};
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Simulcast.prototype._updateRemoteMaps = function (lines) {
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var remoteVideoSources = this._parseMedia(lines, ['video'])[0], videoSource, quality;
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// (re) initialize the remote maps.
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remoteMaps = {
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msid2Quality: {},
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ssrc2Msid: {},
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receivingVideoStreams: {}
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};
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if (remoteVideoSources.groups && remoteVideoSources.groups.length !== 0) {
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remoteVideoSources.groups.forEach(function (group) {
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if (group.semantics === 'SIM' && group.ssrcs && group.ssrcs.length !== 0) {
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@ -518,6 +573,12 @@ function Simulcast() {
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}
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};
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/**
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*
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*
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* @param desc
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* @returns {*}
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*/
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Simulcast.prototype.transformLocalDescription = function (desc) {
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if (config.enableSimulcast && !config.useNativeSimulcast) {
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@ -539,14 +600,28 @@ function Simulcast() {
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return desc;
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};
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/**
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* Removes the ssrc-group:SIM from the remote description bacause Chrome
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* either gets confused and thinks this is an FID group or, if an FID group
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* is already present, it fails to set the remote description.
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*
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* @param desc
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* @returns {*}
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*/
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Simulcast.prototype.transformRemoteDescription = function (desc) {
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if (config.enableSimulcast) {
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var sb = desc.sdp.split('\r\n');
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this._updateRemoteMaps(sb);
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this._removeSimulcastGroup(sb); // NOTE(gp) this needs to be called after updateRemoteMaps!
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this._ensureGoogConference(sb);
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this._cacheRemoteVideoSources(sb);
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this._removeSimulcastGroup(sb); // NOTE(gp) this needs to be called after updateRemoteMaps because we need the simulcast group in the _updateRemoteMaps() method.
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if (config.useNativeSimulcast) {
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// We don't need the goog conference flag if we're not doing
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// native simulcast.
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this._ensureGoogConference(sb);
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}
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desc = new RTCSessionDescription({
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type: desc.type,
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@ -562,20 +637,28 @@ function Simulcast() {
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return desc;
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};
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Simulcast.prototype.setReceivingVideoStream = function (ssrc) {
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Simulcast.prototype._setReceivingVideoStream = function (ssrc) {
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var receivingTrack = remoteMaps.ssrc2Msid[ssrc],
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msidParts = receivingTrack.split(' ');
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remoteMaps.receivingVideoStreams[msidParts[0]] = msidParts[1];
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};
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/**
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* Returns a stream with single video track, the one currently being
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* received by this endpoint.
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*
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* @param stream the remote simulcast stream.
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* @returns {webkitMediaStream}
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*/
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Simulcast.prototype.getReceivingVideoStream = function (stream) {
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var tracks, track, i, electedTrack, msid, quality = 1, receivingTrackId;
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var tracks, i, electedTrack, msid, quality = 1, receivingTrackId;
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if (config.enableSimulcast) {
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if (remoteMaps.receivingVideoStreams[stream.id])
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{
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// the bridge has signaled us to receive a specific track.
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receivingTrackId = remoteMaps.receivingVideoStreams[stream.id];
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tracks = stream.getVideoTracks();
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for (i = 0; i < tracks.length; i++) {
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@ -587,15 +670,18 @@ function Simulcast() {
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}
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if (!electedTrack) {
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// we don't have an elected track, choose by initial quality.
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tracks = stream.getVideoTracks();
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for (i = 0; i < tracks.length; i++) {
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track = tracks[i];
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msid = [stream.id, track.id].join(' ');
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msid = [stream.id, tracks[i].id].join(' ');
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if (remoteMaps.msid2Quality[msid] === quality) {
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electedTrack = track;
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electedTrack = tracks[i];
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break;
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}
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}
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// TODO(gp) if the initialQuality could not be satisfied, lower
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// the requirement and try again.
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}
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}
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@ -604,6 +690,15 @@ function Simulcast() {
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: stream;
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};
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var stream;
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/**
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* GUM for simulcast.
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*
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* @param constraints
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* @param success
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* @param err
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*/
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Simulcast.prototype.getUserMedia = function (constraints, success, err) {
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// TODO(gp) what if we request a resolution not supported by the hardware?
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@ -620,7 +715,10 @@ function Simulcast() {
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if (config.enableSimulcast && !config.useNativeSimulcast) {
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// NOTE(gp) if we request the lq stream first webkitGetUserMedia fails randomly. Tested with Chrome 37.
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// NOTE(gp) if we request the lq stream first webkitGetUserMedia
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// fails randomly. Tested with Chrome 37. As fippo suggested, the
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// reason appears to be that Chrome only acquires the cam once and
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// then downscales the picture (https://code.google.com/p/chromium/issues/detail?id=346616#c11)
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navigator.webkitGetUserMedia(constraints, function (hqStream) {
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@ -641,6 +739,7 @@ function Simulcast() {
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localMaps.msids.splice(0, 0, lqStream.getVideoTracks()[0].id);
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hqStream.addTrack(lqStream.getVideoTracks()[0]);
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stream = hqStream;
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success(hqStream);
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}, err);
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}, err);
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@ -656,18 +755,95 @@ function Simulcast() {
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// add hq stream to local map
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localMaps.msids.push(hqStream.getVideoTracks()[0].id);
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stream = hqStream;
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success(hqStream);
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}, err);
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}
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};
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Simulcast.prototype.getRemoteVideoStreamIdBySSRC = function (primarySSRC) {
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return remoteMaps.ssrc2Msid[primarySSRC];
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/**
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* Gets the fully qualified msid (stream.id + track.id) associated to the
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* SSRC.
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*
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* @param ssrc
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* @returns {*}
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*/
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Simulcast.prototype.getRemoteVideoStreamIdBySSRC = function (ssrc) {
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return remoteMaps.ssrc2Msid[ssrc];
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};
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Simulcast.prototype.parseMedia = function (desc, mediatypes) {
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var lines = desc.sdp.split('\r\n');
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return this._parseMedia(lines, mediatypes);
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};
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Simulcast.prototype._startLocalVideoStream = function (ssrc) {
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var trackid;
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Object.keys(localMaps.msid2ssrc).some(function (tid) {
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if (localMaps.msid2ssrc[tid] == ssrc)
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{
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trackid = tid;
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return true;
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}
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});
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stream.getVideoTracks().some(function(track) {
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if (track.id === trackid) {
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track.enabled = true;
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return true;
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}
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});
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};
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Simulcast.prototype._stopLocalVideoStream = function (ssrc) {
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var trackid;
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Object.keys(localMaps.msid2ssrc).some(function (tid) {
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if (localMaps.msid2ssrc[tid] == ssrc)
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{
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trackid = tid;
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return true;
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}
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});
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stream.getVideoTracks().some(function(track) {
|
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if (track.id === trackid) {
|
||||
track.enabled = false;
|
||||
return true;
|
||||
}
|
||||
});
|
||||
};
|
||||
|
||||
Simulcast.prototype.getLocalVideoStream = function() {
|
||||
var track;
|
||||
|
||||
stream.getVideoTracks().some(function(t) {
|
||||
if ((track = t).enabled) {
|
||||
return true;
|
||||
}
|
||||
});
|
||||
|
||||
return new webkitMediaStream([track]);
|
||||
};
|
||||
|
||||
$(document).bind('simulcastlayerschanged', function (event, endpointSimulcastLayers) {
|
||||
endpointSimulcastLayers.forEach(function (esl) {
|
||||
var ssrc = esl.simulcastLayer.primarySSRC;
|
||||
var simulcast = new Simulcast();
|
||||
simulcast._setReceivingVideoStream(ssrc);
|
||||
});
|
||||
});
|
||||
|
||||
$(document).bind('startsimulcastlayer', function(event, simulcastLayer) {
|
||||
var ssrc = simulcastLayer.primarySSRC;
|
||||
var simulcast = new Simulcast();
|
||||
simulcast._startLocalVideoStream(ssrc);
|
||||
});
|
||||
|
||||
$(document).bind('stopsimulcastlayer', function(event, simulcastLayer) {
|
||||
var ssrc = simulcastLayer.primarySSRC;
|
||||
var simulcast = new Simulcast();
|
||||
simulcast._stopLocalVideoStream(ssrc);
|
||||
});
|
||||
}());
|
||||
|
|
|
|||
|
|
@ -116,6 +116,10 @@ var VideoLayout = (function (my) {
|
|||
|
||||
var isVisible = $('#largeVideo').is(':visible');
|
||||
|
||||
// we need this here because after the fade the videoSrc may have
|
||||
// changed.
|
||||
var isDesktop = isVideoSrcDesktop(newSrc);
|
||||
|
||||
$('#largeVideo').fadeOut(300, function () {
|
||||
var oldSrc = $(this).attr('src');
|
||||
|
||||
|
|
@ -137,7 +141,7 @@ var VideoLayout = (function (my) {
|
|||
}
|
||||
|
||||
// Change the way we'll be measuring and positioning large video
|
||||
var isDesktop = isVideoSrcDesktop(newSrc);
|
||||
|
||||
getVideoSize = isDesktop
|
||||
? getDesktopVideoSize
|
||||
: getCameraVideoSize;
|
||||
|
|
@ -209,7 +213,7 @@ var VideoLayout = (function (my) {
|
|||
|
||||
// Triggers a "video.selected" event. The "false" parameter indicates
|
||||
// this isn't a prezi.
|
||||
$(document).trigger("video.selected", [false]);
|
||||
$(document).trigger("video.selected", [false, userJid]);
|
||||
|
||||
VideoLayout.updateLargeVideo(videoSrc, 1);
|
||||
|
||||
|
|
@ -1294,6 +1298,28 @@ var VideoLayout = (function (my) {
|
|||
}
|
||||
});
|
||||
|
||||
$(document).bind('startsimulcastlayer', function(event, simulcastLayer) {
|
||||
var localVideoSelector = $('#' + 'localVideo_' + connection.jingle.localVideo.id);
|
||||
var simulcast = new Simulcast();
|
||||
var stream = simulcast.getLocalVideoStream();
|
||||
|
||||
// Attach WebRTC stream
|
||||
RTC.attachMediaStream(localVideoSelector, stream);
|
||||
|
||||
localVideoSrc = $(localVideoSelector).attr('src');
|
||||
});
|
||||
|
||||
$(document).bind('stopsimulcastlayer', function(event, simulcastLayer) {
|
||||
var localVideoSelector = $('#' + 'localVideo_' + connection.jingle.localVideo.id);
|
||||
var simulcast = new Simulcast();
|
||||
var stream = simulcast.getLocalVideoStream();
|
||||
|
||||
// Attach WebRTC stream
|
||||
RTC.attachMediaStream(localVideoSelector, stream);
|
||||
|
||||
localVideoSrc = $(localVideoSelector).attr('src');
|
||||
});
|
||||
|
||||
/**
|
||||
* On simulcast layers changed event.
|
||||
*/
|
||||
|
|
@ -1302,7 +1328,6 @@ var VideoLayout = (function (my) {
|
|||
endpointSimulcastLayers.forEach(function (esl) {
|
||||
|
||||
var primarySSRC = esl.simulcastLayer.primarySSRC;
|
||||
simulcast.setReceivingVideoStream(primarySSRC);
|
||||
var msid = simulcast.getRemoteVideoStreamIdBySSRC(primarySSRC);
|
||||
|
||||
// Get session and stream from msid.
|
||||
|
|
|
|||
Loading…
Reference in New Issue