608 lines
23 KiB
JavaScript
608 lines
23 KiB
JavaScript
/*
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Copyright 2014 OpenMarket Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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'use strict';
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var forAllVideoTracksOnStream = function(s, f) {
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var tracks = s.getVideoTracks();
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for (var i = 0; i < tracks.length; i++) {
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f(tracks[i]);
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}
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}
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var forAllAudioTracksOnStream = function(s, f) {
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var tracks = s.getAudioTracks();
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for (var i = 0; i < tracks.length; i++) {
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f(tracks[i]);
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}
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}
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var forAllTracksOnStream = function(s, f) {
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forAllVideoTracksOnStream(s, f);
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forAllAudioTracksOnStream(s, f);
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}
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navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia;
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window.RTCPeerConnection = window.RTCPeerConnection || window.webkitRTCPeerConnection; // but not mozRTCPeerConnection because its interface is not compatible
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window.RTCSessionDescription = window.RTCSessionDescription || window.webkitRTCSessionDescription || window.mozRTCSessionDescription;
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window.RTCIceCandidate = window.RTCIceCandidate || window.webkitRTCIceCandidate || window.mozRTCIceCandidate;
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// Returns true if the browser supports all required features to make WebRTC call
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var isWebRTCSupported = function () {
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return !!(navigator.getUserMedia || window.RTCPeerConnection || window.RTCSessionDescription || window.RTCIceCandidate);
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};
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angular.module('MatrixCall', [])
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.factory('MatrixCall', ['matrixService', 'matrixPhoneService', '$rootScope', '$timeout', function MatrixCallFactory(matrixService, matrixPhoneService, $rootScope, $timeout) {
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$rootScope.isWebRTCSupported = isWebRTCSupported();
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var MatrixCall = function(room_id) {
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this.room_id = room_id;
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this.call_id = "c" + new Date().getTime();
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this.state = 'fledgling';
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this.didConnect = false;
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// a queue for candidates waiting to go out. We try to amalgamate candidates into a single candidate message where possible
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this.candidateSendQueue = [];
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this.candidateSendTries = 0;
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var self = this;
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$rootScope.$watch(this.remoteVideoElement, function (oldValue, newValue) {
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self.tryPlayRemoteStream();
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});
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}
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MatrixCall.getTurnServer = function() {
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matrixService.getTurnServer().then(function(response) {
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if (response.data.uris) {
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console.log("Got TURN URIs: "+response.data.uris);
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MatrixCall.turnServer = response.data;
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$rootScope.haveTurn = true;
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// re-fetch when we're about to reach the TTL
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$timeout(MatrixCall.getTurnServer, MatrixCall.turnServer.ttl * 1000 * 0.9);
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} else {
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console.log("Got no TURN URIs from HS");
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$rootScope.haveTurn = false;
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}
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}, function(error) {
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console.log("Failed to get TURN URIs");
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MatrixCall.turnServer = {};
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$timeout(MatrixCall.getTurnServer, 60000);
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});
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}
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// FIXME: we should prevent any class from being placed or accepted before this has finished
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MatrixCall.getTurnServer();
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MatrixCall.CALL_TIMEOUT = 60000;
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MatrixCall.FALLBACK_STUN_SERVER = 'stun:stun.l.google.com:19302';
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MatrixCall.prototype.createPeerConnection = function() {
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var pc;
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if (window.mozRTCPeerConnection) {
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var iceServers = [];
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if (MatrixCall.turnServer) {
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if (MatrixCall.turnServer.uris) {
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for (var i = 0; i < MatrixCall.turnServer.uris.length; i++) {
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iceServers.push({
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'url': MatrixCall.turnServer.uris[i],
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'username': MatrixCall.turnServer.username,
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'credential': MatrixCall.turnServer.password,
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});
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}
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} else {
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console.log("No TURN server: using fallback STUN server");
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iceServers.push({ 'url' : MatrixCall.FALLBACK_STUN_SERVER });
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}
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}
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pc = new window.mozRTCPeerConnection({"iceServers":iceServers});
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} else {
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var iceServers = [];
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if (MatrixCall.turnServer) {
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if (MatrixCall.turnServer.uris) {
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iceServers.push({
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'urls': MatrixCall.turnServer.uris,
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'username': MatrixCall.turnServer.username,
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'credential': MatrixCall.turnServer.password,
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});
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} else {
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console.log("No TURN server: using fallback STUN server");
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iceServers.push({ 'urls' : MatrixCall.FALLBACK_STUN_SERVER });
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}
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}
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pc = new window.RTCPeerConnection({"iceServers":iceServers});
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}
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var self = this;
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pc.oniceconnectionstatechange = function() { self.onIceConnectionStateChanged(); };
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pc.onsignalingstatechange = function() { self.onSignallingStateChanged(); };
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pc.onicecandidate = function(c) { self.gotLocalIceCandidate(c); };
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pc.onaddstream = function(s) { self.onAddStream(s); };
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return pc;
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}
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MatrixCall.prototype.getUserMediaVideoContraints = function(callType) {
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switch (callType) {
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case 'voice':
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return ({audio: true, video: false});
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case 'video':
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return ({audio: true, video: {
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mandatory: {
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minWidth: 640,
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maxWidth: 640,
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minHeight: 360,
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maxHeight: 360,
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}
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}});
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}
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};
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MatrixCall.prototype.placeVoiceCall = function() {
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this.placeCallWithConstraints(this.getUserMediaVideoContraints('voice'));
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this.type = 'voice';
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};
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MatrixCall.prototype.placeVideoCall = function(config) {
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this.placeCallWithConstraints(this.getUserMediaVideoContraints('video'));
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this.type = 'video';
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};
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MatrixCall.prototype.placeCallWithConstraints = function(constraints) {
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var self = this;
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matrixPhoneService.callPlaced(this);
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navigator.getUserMedia(constraints, function(s) { self.gotUserMediaForInvite(s); }, function(e) { self.getUserMediaFailed(e); });
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this.state = 'wait_local_media';
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this.direction = 'outbound';
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this.config = constraints;
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};
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MatrixCall.prototype.initWithInvite = function(event) {
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this.msg = event.content;
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this.peerConn = this.createPeerConnection();
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this.peerConn.setRemoteDescription(new RTCSessionDescription(this.msg.offer), this.onSetRemoteDescriptionSuccess, this.onSetRemoteDescriptionError);
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this.state = 'ringing';
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this.direction = 'inbound';
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if (window.mozRTCPeerConnection) {
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// firefox's RTCPeerConnection doesn't add streams until it starts getting media on them
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// so we need to figure out whether a video channel has been offered by ourselves.
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if (this.msg.offer.sdp.indexOf('m=video') > -1) {
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this.type = 'video';
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} else {
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this.type = 'voice';
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}
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}
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var self = this;
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$timeout(function() {
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if (self.state == 'ringing') {
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self.state = 'ended';
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self.hangupParty = 'remote'; // effectively
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self.stopAllMedia();
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if (self.peerConn.signalingState != 'closed') self.peerConn.close();
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if (self.onHangup) self.onHangup(self);
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}
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}, this.msg.lifetime - event.age);
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};
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// perverse as it may seem, sometimes we want to instantiate a call with a hangup message
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// (because when getting the state of the room on load, events come in reverse order and
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// we want to remember that a call has been hung up)
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MatrixCall.prototype.initWithHangup = function(event) {
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this.msg = event.content;
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this.state = 'ended';
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};
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MatrixCall.prototype.answer = function() {
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console.log("Answering call "+this.call_id);
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var self = this;
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var roomMembers = $rootScope.events.rooms[this.room_id].members;
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if (roomMembers[matrixService.config().user_id].membership != 'join') {
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console.log("We need to join the room before we can accept this call");
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matrixService.join(this.room_id).then(function() {
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self.answer();
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}, function() {
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console.log("Failed to join room: can't answer call!");
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self.onError("Unable to join room to answer call!");
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self.hangup();
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});
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return;
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}
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if (!this.localAVStream && !this.waitForLocalAVStream) {
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navigator.getUserMedia(this.getUserMediaVideoContraints(this.type), function(s) { self.gotUserMediaForAnswer(s); }, function(e) { self.getUserMediaFailed(e); });
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this.state = 'wait_local_media';
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} else if (this.localAVStream) {
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this.gotUserMediaForAnswer(this.localAVStream);
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} else if (this.waitForLocalAVStream) {
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this.state = 'wait_local_media';
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}
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};
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MatrixCall.prototype.stopAllMedia = function() {
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if (this.localAVStream) {
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forAllTracksOnStream(this.localAVStream, function(t) {
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if (t.stop) t.stop();
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});
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}
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if (this.remoteAVStream) {
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forAllTracksOnStream(this.remoteAVStream, function(t) {
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if (t.stop) t.stop();
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});
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}
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};
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MatrixCall.prototype.hangup = function(reason, suppressEvent) {
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console.log("Ending call "+this.call_id);
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// pausing now keeps the last frame (ish) of the video call in the video element
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// rather than it just turning black straight away
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if (this.remoteVideoElement) this.remoteVideoElement.pause();
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if (this.localVideoElement) this.localVideoElement.pause();
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this.stopAllMedia();
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if (this.peerConn) this.peerConn.close();
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this.hangupParty = 'local';
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this.hangupReason = reason;
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var content = {
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version: 0,
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call_id: this.call_id,
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reason: reason
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};
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this.sendEventWithRetry('m.call.hangup', content);
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this.state = 'ended';
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if (this.onHangup && !suppressEvent) this.onHangup(this);
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};
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MatrixCall.prototype.gotUserMediaForInvite = function(stream) {
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if (this.successor) {
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this.successor.gotUserMediaForAnswer(stream);
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return;
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}
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if (this.state == 'ended') return;
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if (this.localVideoElement && this.type == 'video') {
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var vidTrack = stream.getVideoTracks()[0];
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this.localVideoElement.src = URL.createObjectURL(stream);
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this.localVideoElement.muted = true;
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this.localVideoElement.play();
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}
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this.localAVStream = stream;
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var audioTracks = stream.getAudioTracks();
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for (var i = 0; i < audioTracks.length; i++) {
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audioTracks[i].enabled = true;
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}
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this.peerConn = this.createPeerConnection();
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this.peerConn.addStream(stream);
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var self = this;
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this.peerConn.createOffer(function(d) {
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self.gotLocalOffer(d);
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}, function(e) {
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self.getLocalOfferFailed(e);
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});
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$rootScope.$apply(function() {
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self.state = 'create_offer';
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});
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};
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MatrixCall.prototype.gotUserMediaForAnswer = function(stream) {
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if (this.state == 'ended') return;
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if (this.localVideoElement && this.type == 'video') {
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var vidTrack = stream.getVideoTracks()[0];
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this.localVideoElement.src = URL.createObjectURL(stream);
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this.localVideoElement.muted = true;
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this.localVideoElement.play();
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}
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this.localAVStream = stream;
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var audioTracks = stream.getAudioTracks();
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for (var i = 0; i < audioTracks.length; i++) {
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audioTracks[i].enabled = true;
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}
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this.peerConn.addStream(stream);
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var self = this;
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var constraints = {
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'mandatory': {
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'OfferToReceiveAudio': true,
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'OfferToReceiveVideo': this.type == 'video'
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},
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};
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this.peerConn.createAnswer(function(d) { self.createdAnswer(d); }, function(e) {}, constraints);
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// This can't be in an apply() because it's called by a predecessor call under glare conditions :(
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self.state = 'create_answer';
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};
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MatrixCall.prototype.gotLocalIceCandidate = function(event) {
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if (event.candidate) {
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console.log("Got local ICE "+event.candidate.sdpMid+" candidate: "+event.candidate.candidate);
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this.sendCandidate(event.candidate);
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}
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}
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MatrixCall.prototype.gotRemoteIceCandidate = function(cand) {
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console.log("Got remote ICE "+cand.sdpMid+" candidate: "+cand.candidate);
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if (this.state == 'ended') {
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console.log("Ignoring remote ICE candidate because call has ended");
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return;
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}
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this.peerConn.addIceCandidate(new RTCIceCandidate(cand), function() {}, function(e) {});
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};
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MatrixCall.prototype.receivedAnswer = function(msg) {
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if (this.state == 'ended') return;
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this.peerConn.setRemoteDescription(new RTCSessionDescription(msg.answer), this.onSetRemoteDescriptionSuccess, this.onSetRemoteDescriptionError);
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this.state = 'connecting';
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};
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MatrixCall.prototype.gotLocalOffer = function(description) {
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console.log("Created offer: "+description);
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if (this.state == 'ended') {
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console.log("Ignoring newly created offer on call ID "+this.call_id+" because the call has ended");
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return;
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}
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this.peerConn.setLocalDescription(description);
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var content = {
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version: 0,
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call_id: this.call_id,
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offer: description,
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lifetime: MatrixCall.CALL_TIMEOUT
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};
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this.sendEventWithRetry('m.call.invite', content);
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var self = this;
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$timeout(function() {
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if (self.state == 'invite_sent') {
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self.hangup('invite_timeout');
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}
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}, MatrixCall.CALL_TIMEOUT);
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$rootScope.$apply(function() {
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self.state = 'invite_sent';
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});
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};
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MatrixCall.prototype.createdAnswer = function(description) {
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console.log("Created answer: "+description);
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this.peerConn.setLocalDescription(description);
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var content = {
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version: 0,
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call_id: this.call_id,
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answer: description
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};
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this.sendEventWithRetry('m.call.answer', content);
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var self = this;
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$rootScope.$apply(function() {
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self.state = 'connecting';
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});
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};
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MatrixCall.prototype.getLocalOfferFailed = function(error) {
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this.onError("Failed to start audio for call!");
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};
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MatrixCall.prototype.getUserMediaFailed = function() {
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this.onError("Couldn't start capturing! Is your microphone set up?");
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this.hangup();
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};
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MatrixCall.prototype.onIceConnectionStateChanged = function() {
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if (this.state == 'ended') return; // because ICE can still complete as we're ending the call
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console.log("Ice connection state changed to: "+this.peerConn.iceConnectionState);
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// ideally we'd consider the call to be connected when we get media but chrome doesn't implement nay of the 'onstarted' events yet
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if (this.peerConn.iceConnectionState == 'completed' || this.peerConn.iceConnectionState == 'connected') {
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var self = this;
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$rootScope.$apply(function() {
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self.state = 'connected';
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self.didConnect = true;
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});
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} else if (this.peerConn.iceConnectionState == 'failed') {
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this.hangup('ice_failed');
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}
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};
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MatrixCall.prototype.onSignallingStateChanged = function() {
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console.log("call "+this.call_id+": Signalling state changed to: "+this.peerConn.signalingState);
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};
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MatrixCall.prototype.onSetRemoteDescriptionSuccess = function() {
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console.log("Set remote description");
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};
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MatrixCall.prototype.onSetRemoteDescriptionError = function(e) {
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console.log("Failed to set remote description"+e);
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};
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MatrixCall.prototype.onAddStream = function(event) {
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console.log("Stream added"+event);
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var s = event.stream;
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this.remoteAVStream = s;
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if (this.direction == 'inbound') {
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if (s.getVideoTracks().length > 0) {
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this.type = 'video';
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} else {
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this.type = 'voice';
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}
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}
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var self = this;
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forAllTracksOnStream(s, function(t) {
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// not currently implemented in chrome
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t.onstarted = self.onRemoteStreamTrackStarted;
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});
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event.stream.onended = function(e) { self.onRemoteStreamEnded(e); };
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// not currently implemented in chrome
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event.stream.onstarted = function(e) { self.onRemoteStreamStarted(e); };
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this.tryPlayRemoteStream();
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};
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MatrixCall.prototype.tryPlayRemoteStream = function(event) {
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if (this.remoteVideoElement && this.remoteAVStream) {
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var player = this.remoteVideoElement;
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player.src = URL.createObjectURL(this.remoteAVStream);
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player.play();
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}
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};
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MatrixCall.prototype.onRemoteStreamStarted = function(event) {
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var self = this;
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$rootScope.$apply(function() {
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self.state = 'connected';
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});
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};
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MatrixCall.prototype.onRemoteStreamEnded = function(event) {
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console.log("Remote stream ended");
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var self = this;
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$rootScope.$apply(function() {
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self.state = 'ended';
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self.hangupParty = 'remote';
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self.stopAllMedia();
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if (self.peerConn.signalingState != 'closed') self.peerConn.close();
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if (self.onHangup) self.onHangup(self);
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});
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};
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MatrixCall.prototype.onRemoteStreamTrackStarted = function(event) {
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var self = this;
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$rootScope.$apply(function() {
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self.state = 'connected';
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});
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};
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MatrixCall.prototype.onHangupReceived = function(msg) {
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console.log("Hangup received");
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if (this.remoteVideoElement) this.remoteVideoElement.pause();
|
|
if (this.localVideoElement) this.localVideoElement.pause();
|
|
this.state = 'ended';
|
|
this.hangupParty = 'remote';
|
|
this.hangupReason = msg.reason;
|
|
this.stopAllMedia();
|
|
if (this.peerConn && this.peerConn.signalingState != 'closed') this.peerConn.close();
|
|
if (this.onHangup) this.onHangup(this);
|
|
};
|
|
|
|
MatrixCall.prototype.replacedBy = function(newCall) {
|
|
console.log(this.call_id+" being replaced by "+newCall.call_id);
|
|
if (this.state == 'wait_local_media') {
|
|
console.log("Telling new call to wait for local media");
|
|
newCall.waitForLocalAVStream = true;
|
|
} else if (this.state == 'create_offer') {
|
|
console.log("Handing local stream to new call");
|
|
newCall.gotUserMediaForAnswer(this.localAVStream);
|
|
delete(this.localAVStream);
|
|
} else if (this.state == 'invite_sent') {
|
|
console.log("Handing local stream to new call");
|
|
newCall.gotUserMediaForAnswer(this.localAVStream);
|
|
delete(this.localAVStream);
|
|
}
|
|
newCall.localVideoElement = this.localVideoElement;
|
|
newCall.remoteVideoElement = this.remoteVideoElement;
|
|
this.successor = newCall;
|
|
this.hangup(true);
|
|
};
|
|
|
|
MatrixCall.prototype.sendEventWithRetry = function(evType, content) {
|
|
var ev = { type:evType, content:content, tries:1 };
|
|
var self = this;
|
|
matrixService.sendEvent(this.room_id, evType, undefined, content).then(this.eventSent, function(error) { self.eventSendFailed(ev, error); } );
|
|
};
|
|
|
|
MatrixCall.prototype.eventSent = function() {
|
|
};
|
|
|
|
MatrixCall.prototype.eventSendFailed = function(ev, error) {
|
|
if (ev.tries > 5) {
|
|
console.log("Failed to send event of type "+ev.type+" on attempt "+ev.tries+". Giving up.");
|
|
return;
|
|
}
|
|
var delayMs = 500 * Math.pow(2, ev.tries);
|
|
console.log("Failed to send event of type "+ev.type+". Retrying in "+delayMs+"ms");
|
|
++ev.tries;
|
|
var self = this;
|
|
$timeout(function() {
|
|
matrixService.sendEvent(self.room_id, ev.type, undefined, ev.content).then(self.eventSent, function(error) { self.eventSendFailed(ev, error); } );
|
|
}, delayMs);
|
|
};
|
|
|
|
// Sends candidates with are sent in a special way because we try to amalgamate them into one message
|
|
MatrixCall.prototype.sendCandidate = function(content) {
|
|
this.candidateSendQueue.push(content);
|
|
var self = this;
|
|
if (this.candidateSendTries == 0) $timeout(function() { self.sendCandidateQueue(); }, 100);
|
|
};
|
|
|
|
MatrixCall.prototype.sendCandidateQueue = function(content) {
|
|
if (this.candidateSendQueue.length == 0) return;
|
|
|
|
var cands = this.candidateSendQueue;
|
|
this.candidateSendQueue = [];
|
|
++this.candidateSendTries;
|
|
var content = {
|
|
version: 0,
|
|
call_id: this.call_id,
|
|
candidates: cands
|
|
};
|
|
var self = this;
|
|
console.log("Attempting to send "+cands.length+" candidates");
|
|
matrixService.sendEvent(self.room_id, 'm.call.candidates', undefined, content).then(function() { self.candsSent(); }, function(error) { self.candsSendFailed(cands, error); } );
|
|
};
|
|
|
|
MatrixCall.prototype.candsSent = function() {
|
|
this.candidateSendTries = 0;
|
|
this.sendCandidateQueue();
|
|
};
|
|
|
|
MatrixCall.prototype.candsSendFailed = function(cands, error) {
|
|
for (var i = 0; i < cands.length; ++i) {
|
|
this.candidateSendQueue.push(cands[i]);
|
|
}
|
|
|
|
if (this.candidateSendTries > 5) {
|
|
console.log("Failed to send candidates on attempt "+this.candidateSendTries+". Giving up for now.");
|
|
this.candidateSendTries = 0;
|
|
return;
|
|
}
|
|
|
|
var delayMs = 500 * Math.pow(2, this.candidateSendTries);
|
|
++this.candidateSendTries;
|
|
console.log("Failed to send candidates. Retrying in "+delayMs+"ms");
|
|
var self = this;
|
|
$timeout(function() {
|
|
self.sendCandidateQueue();
|
|
}, delayMs);
|
|
};
|
|
|
|
return MatrixCall;
|
|
}]);
|