Splits Simulcast into NativeSimulcast, GrumpySimulcast and NoSimulcast.

This commit is contained in:
George Politis 2014-10-15 16:11:54 +02:00
parent d20d568c28
commit 12957fecc2
2 changed files with 458 additions and 263 deletions

View File

@ -10,7 +10,8 @@
<meta itemprop="description" content="Join a WebRTC video conference powered by the Jitsi Videobridge"/> <meta itemprop="description" content="Join a WebRTC video conference powered by the Jitsi Videobridge"/>
<meta itemprop="image" content="/images/jitsilogo.png"/> <meta itemprop="image" content="/images/jitsilogo.png"/>
<script src="libs/jquery-2.1.1.min.js"></script> <script src="libs/jquery-2.1.1.min.js"></script>
<script src="simulcast.js?v=1"></script><!-- simulcast handling --> <script src="config.js?v=5"></script><!-- adapt to your needs, i.e. set hosts and bosh path -->
<script src="simulcast.js?v=2"></script><!-- simulcast handling -->
<script src="libs/strophe/strophe.jingle.adapter.js?v=1"></script><!-- strophe.jingle bundles --> <script src="libs/strophe/strophe.jingle.adapter.js?v=1"></script><!-- strophe.jingle bundles -->
<script src="libs/strophe/strophe.min.js?v=1"></script> <script src="libs/strophe/strophe.min.js?v=1"></script>
<script src="libs/strophe/strophe.disco.min.js?v=1"></script> <script src="libs/strophe/strophe.disco.min.js?v=1"></script>
@ -27,7 +28,6 @@
<script src="libs/rayo.js?v=1"></script> <script src="libs/rayo.js?v=1"></script>
<script src="libs/tooltip.js?v=1"></script><!-- bootstrap tooltip lib --> <script src="libs/tooltip.js?v=1"></script><!-- bootstrap tooltip lib -->
<script src="libs/popover.js?v=1"></script><!-- bootstrap tooltip lib --> <script src="libs/popover.js?v=1"></script><!-- bootstrap tooltip lib -->
<script src="config.js?v=5"></script><!-- adapt to your needs, i.e. set hosts and bosh path -->
<script src="interface_config.js?v=2"></script> <script src="interface_config.js?v=2"></script>
<script src="brand.js?v=1"></script> <script src="brand.js?v=1"></script>
<script src="muc.js?v=14"></script><!-- simple MUC library --> <script src="muc.js?v=14"></script><!-- simple MUC library -->

View File

@ -7,12 +7,6 @@
function Simulcast() { function Simulcast() {
"use strict"; "use strict";
// TODO(gp) split the Simulcast class in two classes : NativeSimulcast and ClassicSimulcast.
// Once we properly support native simulcast, enable it automatically in the
// supported browsers (Chrome).
this.useNativeSimulcast = false;
// TODO(gp) we need a logging framework for javascript à la log4j or the // TODO(gp) we need a logging framework for javascript à la log4j or the
// java logging framework that allows for selective log display // java logging framework that allows for selective log display
this.debugLvl = 0; this.debugLvl = 0;
@ -336,7 +330,7 @@ Simulcast.prototype = {
}, },
_appendSimulcastGroup: function (lines) { _appendSimulcastGroup: function (lines) {
var videoSources, ssrcGroup, simSSRC, numOfSubs = 3, i, sb, msid; var videoSources, ssrcGroup, simSSRC, numOfSubs = 2, i, sb, msid;
if (this.debugLvl) { if (this.debugLvl) {
console.info('Appending simulcast group...'); console.info('Appending simulcast group...');
@ -442,40 +436,6 @@ Simulcast.prototype = {
return sb; return sb;
}, },
/**
* Ensures that the simulcast group is present in the answer, _if_ native
* simulcast is enabled,
*
* @param desc
* @returns {*}
*/
transformAnswer: function (desc) {
if (config.enableSimulcast && this.useNativeSimulcast) {
var sb = desc.sdp.split('\r\n');
// Even if we have enabled native simulcasting previously
// (with a call to SLD with an appropriate SDP, for example),
// createAnswer seems to consistently generate incomplete SDP
// with missing SSRCS.
//
// So, subsequent calls to SLD will have missing SSRCS and presence
// won't have the complete list of SRCs.
this._ensureSimulcastGroup(sb);
desc = new RTCSessionDescription({
type: desc.type,
sdp: sb.join('\r\n')
});
if (this.debugLvl && this.debugLvl > 1) {
console.info('Transformed answer');
console.info(desc.sdp);
}
}
return desc;
},
_restoreSimulcastGroups: function (sb) { _restoreSimulcastGroups: function (sb) {
this._restoreRemoteVideoSources(sb); this._restoreRemoteVideoSources(sb);
@ -511,55 +471,6 @@ Simulcast.prototype = {
return desc; return desc;
}, },
/**
* Prepares the local description for public usage (i.e. to be signaled
* through Jingle to the focus).
*
* @param desc
* @returns {RTCSessionDescription}
*/
reverseTransformLocalDescription: function (desc) {
var sb;
if (!desc || desc == null) {
return desc;
}
if (config.enableSimulcast) {
if (this.useNativeSimulcast) {
sb = desc.sdp.split('\r\n');
this._explodeLocalSimulcastSources(sb);
desc = new RTCSessionDescription({
type: desc.type,
sdp: sb.join('\r\n')
});
if (this.debugLvl && this.debugLvl > 1) {
console.info('Exploded local video sources');
console.info(desc.sdp);
}
} else {
sb = desc.sdp.split('\r\n');
this._groupLocalVideoSources(sb);
desc = new RTCSessionDescription({
type: desc.type,
sdp: sb.join('\r\n')
});
if (this.debugLvl && this.debugLvl > 1) {
console.info('Grouped local video sources');
console.info(desc.sdp);
}
}
}
return desc;
},
_ensureOrder: function (lines) { _ensureOrder: function (lines) {
var videoSources, sb; var videoSources, sb;
@ -593,70 +504,6 @@ Simulcast.prototype = {
} }
}, },
/**
*
*
* @param desc
* @returns {*}
*/
transformLocalDescription: function (desc) {
if (config.enableSimulcast && !this.useNativeSimulcast) {
var sb = desc.sdp.split('\r\n');
this._removeSimulcastGroup(sb);
desc = new RTCSessionDescription({
type: desc.type,
sdp: sb.join('\r\n')
});
if (this.debugLvl && this.debugLvl > 1) {
console.info('Transformed local description');
console.info(desc.sdp);
}
}
return desc;
},
/**
* Removes the ssrc-group:SIM from the remote description bacause Chrome
* either gets confused and thinks this is an FID group or, if an FID group
* is already present, it fails to set the remote description.
*
* @param desc
* @returns {*}
*/
transformRemoteDescription: function (desc) {
if (config.enableSimulcast) {
var sb = desc.sdp.split('\r\n');
this._updateRemoteMaps(sb);
this._cacheRemoteVideoSources(sb);
this._removeSimulcastGroup(sb); // NOTE(gp) this needs to be called after updateRemoteMaps because we need the simulcast group in the _updateRemoteMaps() method.
if (this.useNativeSimulcast) {
// We don't need the goog conference flag if we're not doing
// native simulcast.
this._ensureGoogConference(sb);
}
desc = new RTCSessionDescription({
type: desc.type,
sdp: sb.join('\r\n')
});
if (this.debugLvl && this.debugLvl > 1) {
console.info('Transformed remote description');
console.info(desc.sdp);
}
}
return desc;
},
_setReceivingVideoStream: function (endpoint, ssrc) { _setReceivingVideoStream: function (endpoint, ssrc) {
this.remoteMaps.receivingVideoStreams[endpoint] = ssrc; this.remoteMaps.receivingVideoStreams[endpoint] = ssrc;
}, },
@ -708,83 +555,6 @@ Simulcast.prototype = {
localStream: null, displayedLocalVideoStream: null, localStream: null, displayedLocalVideoStream: null,
/**
* GUM for simulcast.
*
* @param constraints
* @param success
* @param err
*/
getUserMedia: function (constraints, success, err) {
// TODO(gp) what if we request a resolution not supported by the hardware?
// TODO(gp) make the lq stream configurable; although this wouldn't work with native simulcast
var lqConstraints = {
audio: false,
video: {
mandatory: {
maxWidth: 320,
maxHeight: 180,
maxFrameRate: 15
}
}
};
console.log('HQ constraints: ', constraints);
console.log('LQ constraints: ', lqConstraints);
if (config.enableSimulcast && !this.useNativeSimulcast) {
// NOTE(gp) if we request the lq stream first webkitGetUserMedia
// fails randomly. Tested with Chrome 37. As fippo suggested, the
// reason appears to be that Chrome only acquires the cam once and
// then downscales the picture (https://code.google.com/p/chromium/issues/detail?id=346616#c11)
var self = this;
navigator.webkitGetUserMedia(constraints, function (hqStream) {
self.localStream = hqStream;
// reset local maps.
self.localMaps.msids = [];
self.localMaps.msid2ssrc = {};
// add hq trackid to local map
self.localMaps.msids.push(hqStream.getVideoTracks()[0].id);
navigator.webkitGetUserMedia(lqConstraints, function (lqStream) {
self.displayedLocalVideoStream = lqStream;
// NOTE(gp) The specification says Array.forEach() will visit
// the array elements in numeric order, and that it doesn't
// visit elements that don't exist.
// add lq trackid to local map
self.localMaps.msids.splice(0, 0, lqStream.getVideoTracks()[0].id);
self.localStream.addTrack(lqStream.getVideoTracks()[0]);
success(self.localStream);
}, err);
}, err);
} else {
// There's nothing special to do for native simulcast, so just do a normal GUM.
navigator.webkitGetUserMedia(constraints, function (hqStream) {
// reset local maps.
self.localMaps.msids = [];
self.localMaps.msid2ssrc = {};
// add hq stream to local map
self.localMaps.msids.push(hqStream.getVideoTracks()[0].id);
self.displayedLocalVideoStream = this.localStream = hqStream;
success(self.localStream);
}, err);
}
},
/** /**
* Gets the fully qualified msid (stream.id + track.id) associated to the * Gets the fully qualified msid (stream.id + track.id) associated to the
* SSRC. * SSRC.
@ -801,40 +571,467 @@ Simulcast.prototype = {
return this._parseMedia(lines, mediatypes); return this._parseMedia(lines, mediatypes);
}, },
_setLocalVideoStreamEnabled: function (ssrc, enabled) {
var trackid;
var self = this;
console.log(['Requested to', enabled ? 'enable' : 'disable', ssrc].join(' '));
if (Object.keys(this.localMaps.msid2ssrc).some(function (tid) {
// Search for the track id that corresponds to the ssrc
if (self.localMaps.msid2ssrc[tid] == ssrc) {
trackid = tid;
return true;
}
}) && self.localStream.getVideoTracks().some(function (track) {
// Start/stop the track that corresponds to the track id
if (track.id === trackid) {
track.enabled = enabled;
return true;
}
})) {
console.log([trackid, enabled ? 'enabled' : 'disabled'].join(' '));
$(document).trigger(enabled
? 'simulcastlayerstarted'
: 'simulcastlayerstopped');
} else {
console.error("I don't have a local stream with SSRC " + ssrc);
}
},
getLocalVideoStream: function () { getLocalVideoStream: function () {
return (this.displayedLocalVideoStream != null) return (this.displayedLocalVideoStream != null)
? this.displayedLocalVideoStream ? this.displayedLocalVideoStream
// in case we have no simulcast at all, i.e. we didn't perform the GUM // in case we have no simulcast at all, i.e. we didn't perform the GUM
: connection.jingle.localVideo; : connection.jingle.localVideo;
} }
};
function NativeSimulcast() {
Simulcast.call(this); // call the super constructor.
} }
NativeSimulcast.prototype = Object.create(Simulcast.prototype);
/**
* GUM for simulcast.
*
* @param constraints
* @param success
* @param err
*/
NativeSimulcast.prototype.getUserMedia = function (constraints, success, err) {
// There's nothing special to do for native simulcast, so just do a normal GUM.
var self = this;
navigator.webkitGetUserMedia(constraints, function (hqStream) {
// reset local maps.
self.localMaps.msids = [];
self.localMaps.msid2ssrc = {};
// add hq stream to local map
self.localMaps.msids.push(hqStream.getVideoTracks()[0].id);
self.displayedLocalVideoStream = self.localStream = hqStream;
success(self.localStream);
}, err);
};
/**
* Prepares the local description for public usage (i.e. to be signaled
* through Jingle to the focus).
*
* @param desc
* @returns {RTCSessionDescription}
*/
NativeSimulcast.prototype.reverseTransformLocalDescription = function (desc) {
var sb;
if (!desc || desc == null) {
return desc;
}
if (config.enableSimulcast) {
sb = desc.sdp.split('\r\n');
this._explodeLocalSimulcastSources(sb);
desc = new RTCSessionDescription({
type: desc.type,
sdp: sb.join('\r\n')
});
if (this.debugLvl && this.debugLvl > 1) {
console.info('Exploded local video sources');
console.info(desc.sdp);
}
}
return desc;
};
/**
* Ensures that the simulcast group is present in the answer, _if_ native
* simulcast is enabled,
*
* @param desc
* @returns {*}
*/
NativeSimulcast.prototype.transformAnswer = function (desc) {
if (config.enableSimulcast) {
var sb = desc.sdp.split('\r\n');
// Even if we have enabled native simulcasting previously
// (with a call to SLD with an appropriate SDP, for example),
// createAnswer seems to consistently generate incomplete SDP
// with missing SSRCS.
//
// So, subsequent calls to SLD will have missing SSRCS and presence
// won't have the complete list of SRCs.
this._ensureSimulcastGroup(sb);
desc = new RTCSessionDescription({
type: desc.type,
sdp: sb.join('\r\n')
});
if (this.debugLvl && this.debugLvl > 1) {
console.info('Transformed answer');
console.info(desc.sdp);
}
}
return desc;
};
/**
*
*
* @param desc
* @returns {*}
*/
NativeSimulcast.prototype.transformLocalDescription = function (desc) {
return desc;
};
/**
* Removes the ssrc-group:SIM from the remote description bacause Chrome
* either gets confused and thinks this is an FID group or, if an FID group
* is already present, it fails to set the remote description.
*
* @param desc
* @returns {*}
*/
NativeSimulcast.prototype.transformRemoteDescription = function (desc) {
if (config.enableSimulcast) {
var sb = desc.sdp.split('\r\n');
this._updateRemoteMaps(sb);
this._cacheRemoteVideoSources(sb);
this._removeSimulcastGroup(sb); // NOTE(gp) this needs to be called after updateRemoteMaps because we need the simulcast group in the _updateRemoteMaps() method.
// We don't need the goog conference flag if we're not doing
// native simulcast.
this._ensureGoogConference(sb);
desc = new RTCSessionDescription({
type: desc.type,
sdp: sb.join('\r\n')
});
if (this.debugLvl && this.debugLvl > 1) {
console.info('Transformed remote description');
console.info(desc.sdp);
}
}
return desc;
};
NativeSimulcast.prototype._setLocalVideoStreamEnabled = function (ssrc, enabled) {
// Nothing to do here, native simulcast does that auto-magically.
};
NativeSimulcast.prototype.constructor = NativeSimulcast;
function GrumpySimulcast() {
Simulcast.call(this);
}
GrumpySimulcast.prototype = Object.create(Simulcast.prototype);
/**
* GUM for simulcast.
*
* @param constraints
* @param success
* @param err
*/
GrumpySimulcast.prototype.getUserMedia = function (constraints, success, err) {
// TODO(gp) what if we request a resolution not supported by the hardware?
// TODO(gp) make the lq stream configurable; although this wouldn't work with native simulcast
var lqConstraints = {
audio: false,
video: {
mandatory: {
maxWidth: 320,
maxHeight: 180,
maxFrameRate: 15
}
}
};
console.log('HQ constraints: ', constraints);
console.log('LQ constraints: ', lqConstraints);
if (config.enableSimulcast) {
// NOTE(gp) if we request the lq stream first webkitGetUserMedia
// fails randomly. Tested with Chrome 37. As fippo suggested, the
// reason appears to be that Chrome only acquires the cam once and
// then downscales the picture (https://code.google.com/p/chromium/issues/detail?id=346616#c11)
var self = this;
navigator.webkitGetUserMedia(constraints, function (hqStream) {
self.localStream = hqStream;
// reset local maps.
self.localMaps.msids = [];
self.localMaps.msid2ssrc = {};
// add hq trackid to local map
self.localMaps.msids.push(hqStream.getVideoTracks()[0].id);
navigator.webkitGetUserMedia(lqConstraints, function (lqStream) {
self.displayedLocalVideoStream = lqStream;
// NOTE(gp) The specification says Array.forEach() will visit
// the array elements in numeric order, and that it doesn't
// visit elements that don't exist.
// add lq trackid to local map
self.localMaps.msids.splice(0, 0, lqStream.getVideoTracks()[0].id);
self.localStream.addTrack(lqStream.getVideoTracks()[0]);
success(self.localStream);
}, err);
}, err);
}
};
/**
* Prepares the local description for public usage (i.e. to be signaled
* through Jingle to the focus).
*
* @param desc
* @returns {RTCSessionDescription}
*/
GrumpySimulcast.prototype.reverseTransformLocalDescription = function (desc) {
var sb;
if (!desc || desc == null) {
return desc;
}
if (config.enableSimulcast) {
sb = desc.sdp.split('\r\n');
this._groupLocalVideoSources(sb);
desc = new RTCSessionDescription({
type: desc.type,
sdp: sb.join('\r\n')
});
if (this.debugLvl && this.debugLvl > 1) {
console.info('Grouped local video sources');
console.info(desc.sdp);
}
}
return desc;
};
/**
* Ensures that the simulcast group is present in the answer, _if_ native
* simulcast is enabled,
*
* @param desc
* @returns {*}
*/
GrumpySimulcast.prototype.transformAnswer = function (desc) {
return desc;
};
/**
*
*
* @param desc
* @returns {*}
*/
GrumpySimulcast.prototype.transformLocalDescription = function (desc) {
if (config.enableSimulcast) {
var sb = desc.sdp.split('\r\n');
this._removeSimulcastGroup(sb);
desc = new RTCSessionDescription({
type: desc.type,
sdp: sb.join('\r\n')
});
if (this.debugLvl && this.debugLvl > 1) {
console.info('Transformed local description');
console.info(desc.sdp);
}
}
return desc;
};
/**
* Removes the ssrc-group:SIM from the remote description bacause Chrome
* either gets confused and thinks this is an FID group or, if an FID group
* is already present, it fails to set the remote description.
*
* @param desc
* @returns {*}
*/
GrumpySimulcast.prototype.transformRemoteDescription = function (desc) {
if (config.enableSimulcast) {
var sb = desc.sdp.split('\r\n');
this._updateRemoteMaps(sb);
this._cacheRemoteVideoSources(sb);
this._removeSimulcastGroup(sb); // NOTE(gp) this needs to be called after updateRemoteMaps because we need the simulcast group in the _updateRemoteMaps() method.
desc = new RTCSessionDescription({
type: desc.type,
sdp: sb.join('\r\n')
});
if (this.debugLvl && this.debugLvl > 1) {
console.info('Transformed remote description');
console.info(desc.sdp);
}
}
return desc;
};
GrumpySimulcast.prototype._setLocalVideoStreamEnabled = function (ssrc, enabled) {
var trackid;
var self = this;
console.log(['Requested to', enabled ? 'enable' : 'disable', ssrc].join(' '));
if (Object.keys(this.localMaps.msid2ssrc).some(function (tid) {
// Search for the track id that corresponds to the ssrc
if (self.localMaps.msid2ssrc[tid] == ssrc) {
trackid = tid;
return true;
}
}) && self.localStream.getVideoTracks().some(function (track) {
// Start/stop the track that corresponds to the track id
if (track.id === trackid) {
track.enabled = enabled;
return true;
}
})) {
console.log([trackid, enabled ? 'enabled' : 'disabled'].join(' '));
$(document).trigger(enabled
? 'simulcastlayerstarted'
: 'simulcastlayerstopped');
} else {
console.error("I don't have a local stream with SSRC " + ssrc);
}
};
GrumpySimulcast.prototype.constructor = GrumpySimulcast;
function NoSimulcast() {
Simulcast.call(this);
}
NoSimulcast.prototype = Object.create(Simulcast.prototype);
/**
* GUM for simulcast.
*
* @param constraints
* @param success
* @param err
*/
NoSimulcast.prototype.getUserMedia = function (constraints, success, err) {
var self = this;
navigator.webkitGetUserMedia(constraints, function (hqStream) {
// reset local maps.
self.localMaps.msids = [];
self.localMaps.msid2ssrc = {};
// add hq stream to local map
self.localMaps.msids.push(hqStream.getVideoTracks()[0].id);
self.displayedLocalVideoStream = self.localStream = hqStream;
success(self.localStream);
}, err);
};
/**
* Prepares the local description for public usage (i.e. to be signaled
* through Jingle to the focus).
*
* @param desc
* @returns {RTCSessionDescription}
*/
NoSimulcast.prototype.reverseTransformLocalDescription = function (desc) {
return desc;
};
/**
* Ensures that the simulcast group is present in the answer, _if_ native
* simulcast is enabled,
*
* @param desc
* @returns {*}
*/
NoSimulcast.prototype.transformAnswer = function (desc) {
return desc;
};
/**
*
*
* @param desc
* @returns {*}
*/
NoSimulcast.prototype.transformLocalDescription = function (desc) {
return desc;
};
/**
* Removes the ssrc-group:SIM from the remote description bacause Chrome
* either gets confused and thinks this is an FID group or, if an FID group
* is already present, it fails to set the remote description.
*
* @param desc
* @returns {*}
*/
NoSimulcast.prototype.transformRemoteDescription = function (desc) {
return desc;
};
NoSimulcast.prototype._setLocalVideoStreamEnabled = function (ssrc, enabled) {
};
NoSimulcast.prototype.constructor = NoSimulcast;
// Initialize simulcast.
var simulcast;
if (!config.enableSimulcast) {
simulcast = new NoSimulcast();
} else {
var isChromium = window.chrome,
vendorName = window.navigator.vendor;
if(isChromium !== null && isChromium !== undefined && vendorName === "Google Inc.") {
var ver = parseInt(window.navigator.appVersion.match(/Chrome\/(\d+)\./)[1], 10);
if (ver > 37) {
simulcast = new NativeSimulcast();
} else {
simulcast = new NoSimulcast();
}
} else {
simulcast = new NoSimulcast();
}
}
$(document).bind('simulcastlayerschanged', function (event, endpointSimulcastLayers) { $(document).bind('simulcastlayerschanged', function (event, endpointSimulcastLayers) {
endpointSimulcastLayers.forEach(function (esl) { endpointSimulcastLayers.forEach(function (esl) {
var ssrc = esl.simulcastLayer.primarySSRC; var ssrc = esl.simulcastLayer.primarySSRC;
@ -850,6 +1047,4 @@ $(document).bind('startsimulcastlayer', function (event, simulcastLayer) {
$(document).bind('stopsimulcastlayer', function (event, simulcastLayer) { $(document).bind('stopsimulcastlayer', function (event, simulcastLayer) {
var ssrc = simulcastLayer.primarySSRC; var ssrc = simulcastLayer.primarySSRC;
simulcast._setLocalVideoStreamEnabled(ssrc, false); simulcast._setLocalVideoStreamEnabled(ssrc, false);
}); });
var simulcast = new Simulcast();