517 lines
14 KiB
JavaScript
517 lines
14 KiB
JavaScript
var isFirefox = typeof window.InstallTrigger !== 'undefined';
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var isOpera = !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0;
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var isChrome = !!window.chrome && !isOpera;
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var isSafari = navigator.userAgent.indexOf("Safari") >= 0 && !isChrome;
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var kurentoHandler = null;
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Kurento = function (
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tag,
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voiceBridge,
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conferenceUsername,
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internalMeetingId,
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onFail = null,
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chromeExtension = null
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) {
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this.ws = null;
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this.video;
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this.screen;
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this.webRtcPeer;
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this.extensionInstalled = false;
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this.screenConstraints = {};
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this.mediaCallback = null;
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this.voiceBridge = voiceBridge + '-SCREENSHARE';
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this.internalMeetingId = internalMeetingId;
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this.vid_width = window.screen.width;
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this.vid_height = window.screen.height;
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// TODO properly generate a uuid
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this.sessid = Math.random().toString();
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this.renderTag = 'remote-media';
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this.caller_id_name = conferenceUsername;
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this.caller_id_number = conferenceUsername;
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this.kurentoPort = "bbb-webrtc-sfu";
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this.hostName = window.location.hostname;
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this.socketUrl = 'wss://' + this.hostName + '/' + this.kurentoPort;
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this.iceServers = null;
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if (chromeExtension != null) {
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this.chromeExtension = chromeExtension;
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window.chromeExtension = chromeExtension;
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}
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if (onFail != null) {
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this.onFail = Kurento.normalizeCallback(onFail);
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} else {
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var _this = this;
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this.onFail = function () {
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_this.logError('Default error handler');
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};
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}
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};
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this.KurentoManager= function () {
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this.kurentoVideo = null;
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this.kurentoScreenshare = null;
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};
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KurentoManager.prototype.exitScreenShare = function () {
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console.log(" [exitScreenShare] Exiting screensharing");
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if(typeof this.kurentoScreenshare !== 'undefined' && this.kurentoScreenshare) {
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if(this.kurentoScreenshare.ws !== null) {
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this.kurentoScreenshare.ws.onclose = function(){};
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this.kurentoScreenshare.ws.close();
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}
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this.kurentoScreenshare.disposeScreenShare();
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this.kurentoScreenshare = null;
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}
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if (this.kurentoScreenshare) {
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this.kurentoScreenshare = null;
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}
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if(typeof this.kurentoVideo !== 'undefined' && this.kurentoVideo) {
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this.exitVideo();
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}
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};
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KurentoManager.prototype.exitVideo = function () {
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console.log(" [exitScreenShare] Exiting screensharing viewing");
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if(typeof this.kurentoVideo !== 'undefined' && this.kurentoVideo) {
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if(this.kurentoVideo.ws !== null) {
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this.kurentoVideo.ws.onclose = function(){};
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this.kurentoVideo.ws.close();
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}
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this.kurentoVideo.disposeScreenShare();
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this.kurentoVideo = null;
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}
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if (this.kurentoVideo) {
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this.kurentoVideo = null;
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}
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};
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KurentoManager.prototype.shareScreen = function (tag) {
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this.exitScreenShare();
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var obj = Object.create(Kurento.prototype);
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Kurento.apply(obj, arguments);
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this.kurentoScreenshare = obj;
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this.kurentoScreenshare.setScreenShare(tag);
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};
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KurentoManager.prototype.joinWatchVideo = function (tag) {
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this.exitVideo();
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var obj = Object.create(Kurento.prototype);
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Kurento.apply(obj, arguments);
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this.kurentoVideo = obj;
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this.kurentoVideo.setWatchVideo(tag);
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};
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Kurento.prototype.setScreenShare = function (tag) {
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this.mediaCallback = this.makeShare.bind(this);
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this.create(tag);
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};
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Kurento.prototype.create = function (tag) {
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this.setRenderTag(tag);
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this.iceServers = true;
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this.init();
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};
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Kurento.prototype.init = function () {
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var self = this;
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if("WebSocket" in window) {
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console.log("this browser supports websockets");
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this.ws = new WebSocket(this.socketUrl);
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this.ws.onmessage = this.onWSMessage.bind(this);
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this.ws.onclose = (close) => {
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kurentoManager.exitScreenShare();
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self.onFail("Websocket connection closed");
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};
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this.ws.onerror = (error) => {
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kurentoManager.exitScreenShare();
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self.onFail("Websocket connection error");
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};
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this.ws.onopen = function () {
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self.mediaCallback();
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}.bind(self);
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}
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else
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console.log("this browser does not support websockets");
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};
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Kurento.prototype.onWSMessage = function (message) {
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var parsedMessage = JSON.parse(message.data);
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switch (parsedMessage.id) {
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case 'presenterResponse':
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this.presenterResponse(parsedMessage);
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break;
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case 'viewerResponse':
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this.viewerResponse(parsedMessage);
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break;
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case 'stopSharing':
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kurentoManager.exitScreenShare();
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break;
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case 'iceCandidate':
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this.webRtcPeer.addIceCandidate(parsedMessage.candidate);
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break;
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default:
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console.error('Unrecognized message', parsedMessage);
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}
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};
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Kurento.prototype.setRenderTag = function (tag) {
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this.renderTag = tag;
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};
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Kurento.prototype.presenterResponse = function (message) {
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if (message.response != 'accepted') {
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var errorMsg = message.message ? message.message : 'Unknown error';
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console.warn('Call not accepted for the following reason: ' + JSON.stringify(errorMsg, null, 2));
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kurentoManager.exitScreenShare();
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this.onFail(errorMessage);
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} else {
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console.log("Presenter call was accepted with SDP => " + message.sdpAnswer);
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this.webRtcPeer.processAnswer(message.sdpAnswer);
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}
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}
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Kurento.prototype.viewerResponse = function (message) {
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if (message.response != 'accepted') {
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var errorMsg = message.message ? message.message : 'Unknown error';
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console.warn('Call not accepted for the following reason: ' + errorMsg);
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kurentoManager.exitScreenShare();
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this.onFail(errorMessage);
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} else {
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console.log("Viewer call was accepted with SDP => " + message.sdpAnswer);
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this.webRtcPeer.processAnswer(message.sdpAnswer);
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}
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}
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Kurento.prototype.serverResponse = function (message) {
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if (message.response != 'accepted') {
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var errorMsg = message.message ? message.message : 'Unknow error';
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console.warn('Call not accepted for the following reason: ' + errorMsg);
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kurentoManager.exitScreenShare();
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} else {
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this.webRtcPeer.processAnswer(message.sdpAnswer);
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}
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}
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Kurento.prototype.makeShare = function() {
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var self = this;
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if (!this.webRtcPeer) {
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var options = {
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onicecandidate : self.onIceCandidate.bind(self)
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}
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this.startScreenStreamFrom();
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}
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}
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Kurento.prototype.onOfferPresenter = function (error, offerSdp) {
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let self = this;
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if(error) {
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console.log("Kurento.prototype.onOfferPresenter Error " + error);
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this.onFail(error);
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return;
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}
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var message = {
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id : 'presenter',
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type: 'screenshare',
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role: 'presenter',
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internalMeetingId: self.internalMeetingId,
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voiceBridge: self.voiceBridge,
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callerName : self.caller_id_name,
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sdpOffer : offerSdp,
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vh: self.vid_height,
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vw: self.vid_width
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};
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console.log("onOfferPresenter sending to screenshare server => " + JSON.stringify(message, null, 2));
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this.sendMessage(message);
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}
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Kurento.prototype.startScreenStreamFrom = function () {
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var self = this;
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if (!!window.chrome) {
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if (!self.chromeExtension) {
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self.logError({
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status: 'failed',
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message: 'Missing Chrome Extension key',
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});
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self.onFail();
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return;
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}
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}
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// TODO it would be nice to check those constraints
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if (typeof screenConstraints !== undefined) {
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self.screenConstraints = {};
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}
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self.screenConstraints.video = {};
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console.log(self);
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var options = {
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localVideo: document.getElementById(this.renderTag),
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onicecandidate : self.onIceCandidate.bind(self),
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mediaConstraints : self.screenConstraints,
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sendSource : 'desktop'
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};
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console.log(" Peer options => " + JSON.stringify(options, null, 2));
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self.webRtcPeer = kurentoUtils.WebRtcPeer.WebRtcPeerSendonly(options, function(error) {
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if(error) {
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console.log("WebRtcPeerSendonly constructor error " + JSON.stringify(error, null, 2));
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self.onFail(error);
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return kurentoManager.exitScreenShare();
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}
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self.webRtcPeer.generateOffer(self.onOfferPresenter.bind(self));
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console.log("Generated peer offer w/ options " + JSON.stringify(options));
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const localStream = self.webRtcPeer.peerConnection.getLocalStreams()[0];
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localStream.getVideoTracks()[0].onended = function () {
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return kurentoManager.exitScreenShare();
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};
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localStream.getVideoTracks()[0].oninactive = function () {
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return kurentoManager.exitScreenShare();
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};
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});
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}
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Kurento.prototype.onIceCandidate = function (candidate) {
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let self = this;
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console.log('Local candidate' + JSON.stringify(candidate));
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var message = {
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id : 'onIceCandidate',
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role: 'presenter',
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type: 'screenshare',
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voiceBridge: self.voiceBridge,
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candidate : candidate
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}
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this.sendMessage(message);
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}
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Kurento.prototype.onViewerIceCandidate = function (candidate) {
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let self = this;
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console.log('Viewer local candidate' + JSON.stringify(candidate));
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var message = {
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id : 'viewerIceCandidate',
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role: 'viewer',
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type: 'screenshare',
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voiceBridge: self.voiceBridge,
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candidate : candidate,
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callerName: self.caller_id_name
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}
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this.sendMessage(message);
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}
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Kurento.prototype.setWatchVideo = function (tag) {
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this.useVideo = true;
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this.useCamera = 'none';
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this.useMic = 'none';
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this.mediaCallback = this.viewer;
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this.create(tag);
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};
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Kurento.prototype.viewer = function () {
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var self = this;
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if (!this.webRtcPeer) {
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var options = {
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remoteVideo: document.getElementById(this.renderTag),
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onicecandidate : this.onViewerIceCandidate.bind(this)
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}
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self.webRtcPeer = kurentoUtils.WebRtcPeer.WebRtcPeerRecvonly(options, function(error) {
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if(error) {
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return self.onFail(error);
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}
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this.generateOffer(self.onOfferViewer.bind(self));
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});
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}
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};
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Kurento.prototype.onOfferViewer = function (error, offerSdp) {
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let self = this;
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if(error) {
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console.log("Kurento.prototype.onOfferViewer Error " + error);
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return this.onFail();
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}
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var message = {
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id : 'viewer',
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type: 'screenshare',
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role: 'viewer',
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internalMeetingId: self.internalMeetingId,
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voiceBridge: self.voiceBridge,
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callerName : self.caller_id_name,
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sdpOffer : offerSdp
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};
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console.log("onOfferViewer sending to screenshare server => " + JSON.stringify(message, null, 2));
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this.sendMessage(message);
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};
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Kurento.prototype.stop = function() {
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//if (this.webRtcPeer) {
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// var message = {
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// id : 'stop',
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// type : 'screenshare',
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// voiceBridge: kurentoHandler.voiceBridge
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// }
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// kurentoHandler.sendMessage(message);
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// kurentoHandler.disposeScreenShare();
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//}
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}
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Kurento.prototype.dispose = function() {
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if (this.webRtcPeer) {
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this.webRtcPeer.dispose();
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this.webRtcPeer = null;
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}
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}
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Kurento.prototype.disposeScreenShare = function() {
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if (this.webRtcPeer) {
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this.webRtcPeer.dispose();
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this.webRtcPeer = null;
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}
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}
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Kurento.prototype.sendMessage = function(message) {
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var jsonMessage = JSON.stringify(message);
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console.log('Sending message: ' + jsonMessage);
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this.ws.send(jsonMessage);
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}
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Kurento.prototype.logger = function (obj) {
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console.log(obj);
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};
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Kurento.prototype.logError = function (obj) {
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console.error(obj);
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};
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Kurento.normalizeCallback = function (callback) {
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if (typeof callback == 'function') {
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return callback;
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} else {
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console.log(document.getElementById('BigBlueButton')[callback]);
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return function (args) {
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document.getElementById('BigBlueButton')[callback](args);
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};
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}
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};
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/* Global methods */
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// this function explains how to use above methods/objects
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window.getScreenConstraints = function(sendSource, callback) {
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let chromeMediaSourceId = sendSource;
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let screenConstraints = {video: {}};
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// Limiting FPS to a range of 5-10 (5 ideal)
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screenConstraints.video.frameRate = {ideal: 5, max: 10};
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// Limiting max resolution to screen size
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screenConstraints.video.height = {max: window.screen.height};
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screenConstraints.video.width = {max: window.screen.width};
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if(isChrome) {
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getChromeScreenConstraints ((constraints) => {
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if (!constraints) {
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document.dispatchEvent(new Event("installChromeExtension"));
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return;
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}
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let sourceId = constraints.streamId;
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kurentoManager.kurentoScreenshare.extensionInstalled = true;
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// this statement sets gets 'sourceId" and sets "chromeMediaSourceId"
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screenConstraints.video.chromeMediaSource = { exact: [sendSource]};
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screenConstraints.video.chromeMediaSourceId = sourceId;
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console.log("getScreenConstraints for Chrome returns => ");
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console.log(screenConstraints);
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// now invoking native getUserMedia API
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callback(null, screenConstraints);
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}, chromeExtension);
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}
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else if (isFirefox) {
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screenConstraints.video.mediaSource= "screen";
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console.log("getScreenConstraints for Firefox returns => ");
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console.log(screenConstraints);
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// now invoking native getUserMedia API
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callback(null, screenConstraints);
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}
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else if(isSafari) {
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screenConstraints.video.mediaSource= "screen";
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console.log("getScreenConstraints for Safari returns => ");
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console.log(screenConstraints);
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// now invoking native getUserMedia API
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callback(null, screenConstraints);
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}
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}
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window.kurentoInitialize = function () {
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if (window.kurentoManager == null || window.KurentoManager == undefined) {
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window.kurentoManager = new KurentoManager();
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}
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};
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window.kurentoShareScreen = function() {
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window.kurentoInitialize();
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window.kurentoManager.shareScreen.apply(window.kurentoManager, arguments);
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};
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window.kurentoExitScreenShare = function () {
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window.kurentoInitialize();
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window.kurentoManager.exitScreenShare();
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};
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window.kurentoWatchVideo = function () {
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window.kurentoInitialize();
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window.kurentoManager.joinWatchVideo.apply(window.kurentoManager, arguments);
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};
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window.kurentoExitVideo = function () {
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window.kurentoInitialize();
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window.kurentoManager.exitVideo();
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}
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window.getChromeScreenConstraints = function(callback, extensionId) {
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chrome.runtime.sendMessage(extensionId, {
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getStream: true,
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sources: [
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"window",
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"screen",
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"tab"
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]},
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function(response) {
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console.log(response);
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callback(response);
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});
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};;
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