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/**
* Class for unification and work with WebRTC commands
* @param params
* @constructor
*/
;(function (window)
{
if (window.BX.webrtc) return;
var BX = window.BX;
// this is constructor, you must inherit
BX.webrtc = function ()
{
this.debug = false;
this.audioMuted = false;
this.videoMuted = false;
this.enabled = false;
this.detectedBrowser = 'none';
this.pcConfig = {};
this.oneway = false;
this.lastUserMediaParams = {};
this.pcConstraints = {};
this.sdpConstraints = {'mandatory': { 'OfferToReceiveAudio':true, 'OfferToReceiveVideo':true }};
this.defaultMicrophone = null;
this.defaultCamera = null;
this.defaultSpeaker = null;
this.enableMicAutoParameters = true;
this.useFallbackConstraints = false;
this.configVideo = {
aspectRatio: 1.7777777778
};
this.configVideoGroup = this.configVideo;
this.configVideoMobile = this.configVideo;
this.configVideoAfterError = { };
this.callStreamSelf = null;
this.callStreamMain = null;
this.callStreamUsers = {};
this.pc = {};
this.pcStart = {};
this.connected = {};
this.iceCandidates = {};
this.initiator = false;
this.callUserId = 0;
this.callChatId = 0;
this.callToGroup = false;
this.callGroupUsers = [];
this.callInit = false;
this.callInitUserId = 0;
this.callActive = false;
this.callVideo = false;
this.callRequestUserMedia = {};
this.needPeerConnection = true;
this.createAnswerTimeout = {};
this.initPeerConnectionTimeout = {};
this.iceCandidateTimeout = {};
this.pcConnectTimeout = {};
this.init();
this.setTurnServer();
};
// this function needed to execute, after constructor
BX.inheritWebrtc = function(child)
{
child.prototype = Object.create(BX.webrtc.prototype);
child.prototype.constructor = child;
child.prototype.parent = BX.webrtc.prototype;
};
BX.webrtc.prototype.init = function()
{
if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia)
this.enabled = true;
else
return;
if (navigator.userAgent.substr(navigator.userAgent.indexOf('Firefox/')+8, 2) >= 27)
this.detectedBrowser = 'firefox';
else if (navigator.appVersion.substr(navigator.appVersion.indexOf('Chrome/')+7, 2) >= 29)
this.detectedBrowser = 'chrome';
};
BX.webrtc.prototype.attachMediaStream = function(element, stream)
{
element.srcObject = stream;
if(BX.type.isNotEmptyString(this.defaultSpeaker) && element.setSinkId)
{
this.log('Trying to set output device: ' + this.defaultSpeaker);
element.setSinkId(this.defaultSpeaker);
}
};
// this is public function, don't overwrite
BX.webrtc.prototype.ready = function ()
{
return this.enabled;
};
// this is public function, don't overwrite
BX.webrtc.prototype.setTurnServer = function (params)
{
if (!this.ready()) return false;
params = params || {};
this.turnServer = params.turnServer || 'turn.calls.bitrix24.com';
this.turnServerFirefox = params.turnServerFirefox || '54.217.240.163';
this.turnServerLogin = params.turnServerLogin || 'bitrix';
this.turnServerPassword = params.turnServerPassword || 'bitrix';
if (this.detectedBrowser == 'firefox')
{
this.pcConfig = { "iceServers": [ { url:"stun:"+this.turnServerFirefox}, { url:"turn:"+this.turnServerFirefox, credential:this.turnServerPassword, username: this.turnServerLogin} ] };
this.pcConstraints = {"optional": [{"DtlsSrtpKeyAgreement": true}]};
}
else if (this.detectedBrowser == 'chrome')
{
this.pcConfig = { "iceServers": [ { url:"stun:"+this.turnServer}, { url:"turn:"+this.turnServerLogin+"@"+this.turnServer, username: this.turnServerLogin, credential:this.turnServerPassword} ] };
this.pcConstraints = {"optional": [{"DtlsSrtpKeyAgreement": true}]};
}
return true;
};
// this is public function, don't overwrite
BX.webrtc.prototype.toggleAudio = function(changeVariable)
{
if (!this.ready()) return false;
changeVariable = typeof(changeVariable) != 'undefined'? changeVariable: true;
if (changeVariable)
this.audioMuted = this.audioMuted? false: true;
if (this.callStreamSelf && this.callStreamSelf.getAudioTracks() && this.callStreamSelf.getAudioTracks().length>0)
{
for (var i = 0; i < this.callStreamSelf.getAudioTracks().length; i++)
{
this.callStreamSelf.getAudioTracks()[i].enabled = !this.audioMuted;
}
}
return true;
};
// this is public function, don't overwrite
BX.webrtc.prototype.toggleVideo = function(changeVariable)
{
if (!this.ready()) return false;
changeVariable = typeof(changeVariable) != 'undefined'? changeVariable: true;
if (changeVariable)
this.videoMuted = this.videoMuted? false: true;
if (this.callStreamSelf && this.callStreamSelf.getVideoTracks() && this.callStreamSelf.getVideoTracks().length>0)
{
for (var i = 0; i < this.callStreamSelf.getVideoTracks().length; i++)
{
this.callStreamSelf.getVideoTracks()[i].enabled = !this.videoMuted;
}
}
return true;
};
// this is public function, don't overwrite
BX.webrtc.prototype.signalingReady = function()
{
return (this.ready() && BX.PULL && BX.PULL.getPullServerStatus());
};
// this is public function, don't overwrite
BX.webrtc.prototype.log = function()
{
var text = '';
if (BX.desktop && BX.desktop.ready())
{
for (var i = 0; i < arguments.length; i++)
{
try
{
text = text+' | '+(typeof(arguments[i]) == 'object'? JSON.stringify(arguments[i]): arguments[i]);
}
catch (e)
{
text = text+' | (circular structure)';
}
}
BX.desktop.log(BX.message('USER_ID')+'.video.log', text.substr(3));
}
if (this.debug)
{
if (console) console.log('WebRTC Log', arguments);
}
};
/* UserMedia API */
// this is public function, you can inherit
BX.webrtc.prototype.startGetUserMedia = function(video, audio)
{
if (this.oneway && !this.initiator)
{
this.onUserMediaSuccess();
return true;
}
this.lastUserMediaParams = {video: video, audio: audio};
if (this.callRequestUserMedia[this.callVideo? 'video': 'audio'])
return false;
if(typeof(video) != 'undefined' && video !== true)
{
//nop
}
else
{
if(this.useFallbackConstraints)
video = this.configVideoAfterError;
else if(this.callToGroup)
video = this.configVideoGroup;
else
video = this.configVideo;
}
if(video && this.defaultCamera)
{
video.deviceId = {ideal: this.defaultCamera};
}
audio = typeof(audio) != 'undefined' && audio !== true? audio: {};
if(audio && this.defaultMicrophone)
{
audio.deviceId = {ideal: this.defaultMicrophone};
}
/* for unknown reason, these constraints do not work in chrome, when paired with video resolution constraints */
if(false && this.enableMicAutoParameters === false)
{
audio.optional = [
{echoCancellation:false},
{googEchoCancellation:false},
{googEchoCancellation2:false},
{googDAEchoCancellation:false},
{googAutoGainControl: false},
{googAutoGainControl2: false},
{mozAutoGainControl: false},
{googNoiseSuppression: false},
{googNoiseSuppression2: false},
{googHighpassFilter: false},
{googTypingNoiseDetection: false},
{googAudioMirroring: false}
];
}
var constraints = {
"audio": audio,
"video": video
};
this.log("Requested access to local media with constraints: \"" + JSON.stringify(constraints) + "\"");
try {
this.callRequestUserMedia[this.callVideo? 'video': 'audio'] = true;
navigator.mediaDevices.getUserMedia(constraints).then(BX.delegate(this.onUserMediaSuccess, this), BX.delegate(this.onUserMediaError, this));
} catch (e) {
this.debug = true;
this.log("Method getUserMedia failed with exception: " + e.message);
}
return true;
}
// this is protected function, you must inherit
BX.webrtc.prototype.onUserMediaSuccess = function(stream)
{
this.log('Media stream received');
if(stream && stream.getTracks)
{
stream.getTracks().forEach(function(track)
{
this.log(BX.webrtc.mediaStreamTrackToString(track));
}.bind(this));
}
if (!this.oneway || this.initiator)
{
this.callRequestUserMedia[this.callVideo? 'video': 'audio'] = false;
if (this.callStreamSelf)
return false;
if (!this.callActive && stream)
{
BX.webrtc.stopMediaStream(stream);
return false;
}
this.log("User has granted access to local media.");
this.callStreamSelf = stream;
this.toggleAudio(false);
}
if (!this.needPeerConnection)
return true;
if (this.initiator)
{
if (this.callToGroup)
{
for (var i = 0; i < this.callGroupUsers.length; i++)
{
var userId = this.callGroupUsers[i];
if (userId != BX.message('USER_ID'))
{
clearTimeout(this.initPeerConnectionTimeout[userId]);
this.initPeerConnection(userId);
}
}
}
else
{
clearTimeout(this.initPeerConnectionTimeout[this.callUserId]);
this.initPeerConnection(this.callUserId);
}
}
else
{
if (this.callToGroup)
{
for (var i = 0; i < this.callGroupUsers.length; i++)
{
var userId = this.callGroupUsers[i];
if (userId != BX.message('USER_ID') && userId != this.callInitUserId && !this.callStreamUsers[userId])
{
clearTimeout(this.initPeerConnectionTimeout[userId]);
this.initPeerConnection(userId, true);
}
}
}
}
return true;
}
// this is protected function, you can inherit
BX.webrtc.prototype.onUserMediaError = function(error)
{
this.debug = true;
this.callRequestUserMedia[this.callVideo? 'video': 'audio'] = false;
if (!this.callActive)
return false;
this.log("Failed to get access to local media. Error code was " + JSON.stringify(error));
return true;
}
/* PeerConnection API */
// this is public function, don't overwrite or inherit
BX.webrtc.prototype.initPeerConnection = function(userId, initiator)
{
if (!this.callActive)
return false;
initiator = initiator === true;
if (this.debug) console.log(userId, 'wait initPeerConnection')
if (!this.pcStart[userId] && (!this.oneway && this.callStreamSelf || this.oneway && this.initiator && this.callStreamSelf || this.oneway && !this.initiator))
{
if (this.connected[userId])
{
this.log("Creating PeerConnection.", userId);
this.createPeerConnection(userId);
if (!this.pc[userId])
{
clearTimeout(this.initPeerConnectionTimeout[userId]);
this.initPeerConnectionTimeout[userId] = setTimeout(BX.delegate(function(){
this.initPeerConnection(userId, initiator);
}, this), 2000);
return false;
}
this.log("Adding local stream.", userId, this.pc[userId]);
this.pcStart[userId] = true;
if (this.initiator || initiator)
this.sendOfferToPeer(userId);
}
else
{
clearTimeout(this.initPeerConnectionTimeout[userId]);
this.initPeerConnectionTimeout[userId] = setTimeout(BX.delegate(function(){
this.initPeerConnection(userId, initiator);
}, this), 2000);
}
}
else if (!this.connected[userId])
{
clearTimeout(this.initPeerConnectionTimeout[userId]);
this.initPeerConnectionTimeout[userId] = setTimeout(BX.delegate(function(){
this.initPeerConnection(userId, initiator);
}, this), 2000);
}
return true;
}
// this protected function, you must inherit
BX.webrtc.prototype.setLocalAndSend = function(userId, desc)
{
if (this.pc[userId] == null || !this.callActive)
return false;
this.log('set local description and send', userId, JSON.stringify(desc));
this.pc[userId].setLocalDescription(desc, BX.delegate(function(a){this.log('setLocalDescription', a)}, this), BX.delegate(function(a){this.log('setLocalDescription', a)}, this));
// need to send local description to "userId" peer
return true;
}
// this is blank function, you must overwrite
BX.webrtc.prototype.onRemoteStreamAdded = function(userId, event, setMainVideo)
{
}
// this is blank function, you can overwrite
BX.webrtc.prototype.onRemoteStreamRemoved = function(userId, event)
{
}
// this is blank function, you must overwrite
BX.webrtc.prototype.onIceCandidate = function (userId, candidates)
{
// need to send IceCandidate to "userId" peer
}
// this is blank function, you can overwrite
BX.webrtc.prototype.onIceConnectionStateChange = function(userId, event)
{
}
// this is blank function, you can overwrite
BX.webrtc.prototype.onSignalingStateChange = function(userId, event)
{
}
// this is blank function, you can overwrite
BX.webrtc.prototype.peerConnectionError = function (userId, event)
{
}
// this is public function, you must inherit
BX.webrtc.prototype.peerConnectionReconnect = function (userId)
{
if (!this.pc[userId])
return false;
if ((this.pc[userId].iceConnectionState == 'connected' || this.pc[userId].iceConnectionState == 'completed') && this.pc[userId].signalingState == 'stable')
return false;
this.log('peerConnectionReconnect', this.pc[userId].iceConnectionState, this.pc[userId].signalingState)
this.pc[userId].close();
delete this.pc[userId];
delete this.pcStart[userId];
if (this.callStreamMain == this.callStreamUsers[userId])
this.callStreamMain = null;
this.callStreamUsers[userId] = null;
clearTimeout(this.initPeerConnectionTimeout[userId]);
// need to send reconnect command to "userId" peer in your class
return true;
}
// this is public function, you can inherit
BX.webrtc.prototype.deleteEvents = function()
{
this.initiator = false;
this.callUserId = 0;
this.callChatId = 0;
this.callToGroup = false;
this.callGroupUsers = [];
this.callInit = false;
this.callInitUserId = 0;
this.callActive = false;
this.callVideo = false;
this.callRequestUserMedia = {};
this.audioMuted = false;
this.videoMuted = false;
this.needPeerConnection = true;
var i = 0;
for (i in this.pc)
{
if(this.pc.hasOwnProperty(i))
{
this.pc[i].close();
delete this.pc[i];
}
}
this.pc = {};
this.pcStart = {};
this.connected = {};
this.iceCandidates = {};
for (i in this.iceCandidateTimeout)
{
if (this.iceCandidateTimeout.hasOwnProperty(i))
{
clearTimeout(this.iceCandidateTimeout[i]);
}
}
this.iceCandidateTimeout = {};
for (i in this.pcConnectTimeout)
{
if (this.pcConnectTimeout.hasOwnProperty(i))
{
clearTimeout(this.pcConnectTimeout[i]);
}
}
this.pcConnectTimeout = {};
for (i in this.createAnswerTimeout)
{
if (this.createAnswerTimeout.hasOwnProperty(i))
{
clearTimeout(this.createAnswerTimeout[i]);
}
}
this.createAnswerTimeout = {};
for (i in this.initPeerConnectionTimeout)
{
if (this.initPeerConnectionTimeout.hasOwnProperty(i))
{
clearTimeout(this.initPeerConnectionTimeout[i]);
}
}
this.initPeerConnectionTimeout = {};
if (this.callStreamSelf)
{
BX.webrtc.stopMediaStream(this.callStreamSelf);
this.callStreamSelf = null;
}
if (this.callStreamMain)
{
BX.webrtc.stopMediaStream(this.callStreamMain);
this.callStreamMain = null;
}
for (i in this.callStreamUsers)
{
if (this.callStreamUsers.hasOwnProperty(i))
{
if (this.callStreamUsers[i])
BX.webrtc.stopMediaStream(this.callStreamUsers[i]);
delete this.callStreamUsers[i];
}
}
}
/* Private function */
// this is private function, don't use or overwrite or inherit
BX.webrtc.prototype.mergeConstraints = function (cons1, cons2)
{
if (!this.ready()) return false;
var merged = cons1;
for (var name in cons2.mandatory)
{
if (cons2.mandatory.hasOwnProperty(name))
{
merged.mandatory[name] = cons2.mandatory[name];
}
}
merged.optional.concat(cons2.optional);
return merged;
};
// this is private function, don't use or overwrite or inherit
BX.webrtc.prototype.sendOfferToPeer = function(userId)
{
if (!this.pc[userId])
return false;
var constraints = {"optional": [], "mandatory": {"MozDontOfferDataChannel": true}};
if (this.detectedBrowser === "chrome")
{
for (var prop in constraints.mandatory)
{
if (constraints.mandatory.hasOwnProperty(prop))
{
if (prop.indexOf("Moz") != -1)
delete constraints.mandatory[prop];
}
}
}
this.log('Constraints', constraints);
constraints = this.mergeConstraints(constraints, this.sdpConstraints);
this.log("Sending offer to peer, with constraints:", userId, "\"" + JSON.stringify(constraints) + "\".");
this.pc[userId].createOffer(BX.delegate(function(desc){this.setLocalAndSend(userId, desc)}, this), BX.delegate(function(a){this.log('createOffer failure', a)}, this), constraints);
return true;
}
// this is private function, don't use or overwrite or inherit
BX.webrtc.prototype.createPeerConnection = function(userId)
{
try
{
this.pc[userId] = new RTCPeerConnection(this.pcConfig, this.pcConstraints);
this.pc[userId].onicecandidate = BX.delegate(function(event) { this.onIceCandidateEvent(userId, event) }, this);
this.pc[userId].onaddstream = BX.delegate(function(event) { this.onRemoteStreamAddedEvent(userId, event) }, this);
this.pc[userId].onremovestream = BX.delegate(function(event) { this.onRemoteStreamRemovedEvent(userId, event)}, this);
this.pc[userId].oniceconnectionstatechange = BX.delegate(function(event) { this.onIceConnectionStateChangeEvent(userId, event)}, this);
this.pc[userId].onsignalingstatechange = BX.delegate(function(event) { this.onSignalingStateChangeEvent(userId, event)}, this);
if (!this.oneway || this.initiator)
{
this.pc[userId].addStream(this.callStreamSelf);
}
this.log("Created RTCPeerConnnection for "+userId+" with:\n" +
" config: \"" + JSON.stringify(this.pcConfig) + "\";\n" +
" constraints: \"" + JSON.stringify(this.pcConstraints) + "\".");
}
catch (e)
{
if (this.callToGroup && this.callStreamUsers[userId])
return false;
this.log('PeerConnection: ', JSON.stringify(this.pcConfig), JSON.stringify(this.pcConstraints));
this.log("Failed to create PeerConnection, exception: " + e.message);
this.peerConnectionError(userId, e);
}
return true;
}
// this is private function, don't use or overwrite or inherit
BX.webrtc.prototype.signalingPeerData = function(userId, peerData)
{
var signal = JSON.parse(peerData);
if (signal.type === 'offer')
{
if (!this.pcStart[userId])
this.initPeerConnection(userId);
this.createAnswer(userId, signal);
}
else if (signal.type === 'answer' && this.pcStart[userId])
{
if (this.pc[userId] == null)
return false;
this.pc[userId].setRemoteDescription(new RTCSessionDescription(signal), function(){}, function(){});
}
else if (signal.type === 'candidate' && this.pcStart[userId])
{
if (!this.pc[userId] || this.pc[userId] == null)
return false;
for (var i = 0; i < signal.candidates.length; i++)
{
var candidate = new RTCIceCandidate({sdpMLineIndex:signal.candidates[i].label, candidate:signal.candidates[i].candidate});
try{
this.pc[userId].addIceCandidate(candidate);
}
catch(e)
{
this.log('Error addIceCandidate', JSON.stringify(e));
this.peerConnectionReconnect(userId);
return false;
}
}
}
else
{
this.log('Signaling command "'+(signal && signal.type? signal.type: 'undefined')+'" from user "'+userId+'" skip');
}
return true;
}
// this is private function, don't use or overwrite or inherit
BX.webrtc.prototype.onRemoteStreamAddedEvent = function (userId, event)
{
if (!this.pc[userId]) return false;
this.log('Remote stream added', userId, JSON.stringify(event));
var setMainVideo = false;
if (!this.callStreamMain)
{
this.callStreamMain = event.stream;
setMainVideo = true;
}
this.callStreamUsers[userId] = event.stream;
this.onRemoteStreamAdded(userId, event, setMainVideo)
}
// this is private function, don't use or overwrite or inherit
BX.webrtc.prototype.onRemoteStreamRemovedEvent = function(userId, event)
{
if (!this.pc[userId]) return false;
this.callStreamUsers[userId] = null;
this.onRemoteStreamRemoved(userId, event);
}
// this is private function, don't use or overwrite or inherit
BX.webrtc.prototype.onIceCandidateEvent = function (userId, event)
{
if (!this.pc[userId]) return false;
if (!this.iceCandidates[userId])
this.iceCandidates[userId] = [];
if (event.candidate)
{
this.log("New ICE candidate: ", event.candidate);
this.iceCandidates[userId].push({type: 'candidate', label: event.candidate.sdpMLineIndex, id: event.candidate.sdpMid, candidate: event.candidate.candidate});
clearTimeout(this.iceCandidateTimeout[userId]);
this.iceCandidateTimeout[userId] = setTimeout(BX.delegate(function(){
if (this.iceCandidates[userId].length === 0)
return false;
this.onIceCandidate(userId, {'type': 'candidate', 'candidates': this.iceCandidates[userId]});
this.iceCandidates[userId] = [];
}, this), 250);
}
else
{
this.log("End of candidates of "+userId);
}
}
// this is private function, don't use or overwrite or inherit
BX.webrtc.prototype.onIceConnectionStateChangeEvent = function(userId, event)
{
clearTimeout(this.pcConnectTimeout[userId]);
if (!this.pc[userId] || this.pc[userId].iceConnectionState == "close")
return false;
this.log('iceConnectionStateChange', userId, this.pc[userId].iceConnectionState, this.pc[userId].signalingState);
this.pcConnectTimeout[userId] = setTimeout(BX.delegate(function(){
this.peerConnectionReconnect(userId);
}, this), 15000);
this.onIceConnectionStateChange(userId, event);
return true;
}
// this is private function, don't use or overwrite or inherit
BX.webrtc.prototype.onSignalingStateChangeEvent = function(userId, event)
{
clearTimeout(this.pcConnectTimeout[userId]);
if (!this.pc[userId] || this.pc[userId].signalingState == "close")
return false;
this.log('signalingStateChange', userId, this.pc[userId].iceConnectionState, this.pc[userId].signalingState);
this.pcConnectTimeout[userId] = setTimeout(BX.delegate(function(){
this.peerConnectionReconnect(userId);
}, this), 15000);
this.onSignalingStateChange(userId, event)
}
// this is private function, don't use or overwrite or inherit
BX.webrtc.prototype.createAnswer = function(userId, signal)
{
if (!this.callActive)
return false;
if (!this.pcStart[userId])
{
clearTimeout(this.createAnswerTimeout[userId]);
this.createAnswerTimeout[userId] = setTimeout(BX.delegate(function(){
this.createAnswer(userId, signal);
}, this), 2000);
return false;
}
this.pc[userId].setRemoteDescription(new RTCSessionDescription(signal), BX.delegate(function()
{
if (!this.pc[userId]) return false;
this.pc[userId].createAnswer(BX.delegate(function(desc){this.setLocalAndSend(userId, desc)}, this), BX.delegate(function(a){this.log('createAnswer failure', a)}, this), this.sdpConstraints);
}, this), function(){});
return true;
}
BX.webrtc.prototype.setDefaultCamera = function(defaultCamera)
{
this.defaultCamera = defaultCamera;
};
BX.webrtc.prototype.setDefaultMicrophone = function(defaultMicrophone)
{
this.defaultMicrophone = defaultMicrophone;
};
BX.webrtc.prototype.logDevices = function()
{
var self = this;
if(navigator.mediaDevices && navigator.mediaDevices.enumerateDevices)
{
self.log('Enumerating media devices');
navigator.mediaDevices.enumerateDevices().then(function(devices)
{
devices.forEach(function(device)
{
try
{
self.log(JSON.stringify(device));
}
catch (e)
{
self.log(device);
}
});
})
}
else
{
self.log('Could not enumerate devices, api is not supported');
}
};
BX.webrtc.mediaStreamTrackToString = function(track)
{
var result = '';
for(key in track)
{
if(!BX.type.isFunction(track[key]))
{
result = result + ' ' + key + ': ' + track[key] + ';';
}
}
return result;
};
BX.webrtc.stopMediaStream = function(mediaStream)
{
if(!(mediaStream instanceof MediaStream))
return;
if (typeof mediaStream.getTracks === 'undefined')
{
// Support for legacy browsers
mediaStream.stop();
}
else
{
mediaStream.getTracks().forEach(function(track)
{
track.stop();
});
}
};
})(window);