750 lines
20 KiB
JavaScript
750 lines
20 KiB
JavaScript
const isFirefox = typeof window.InstallTrigger !== 'undefined';
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const isOpera = !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0;
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const isChrome = !!window.chrome && !isOpera;
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const isSafari = navigator.userAgent.indexOf('Safari') >= 0 && !isChrome;
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const kurentoHandler = null;
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const SEND_ROLE = "send";
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const RECV_ROLE = "recv";
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const SFU_APP = "screenshare";
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const ON_ICE_CANDIDATE_MSG = "onIceCandidate";
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const START_MSG = "start";
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const START_RESPONSE_MSG = "startResponse";
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const PING_INTERVAL = 15000;
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Kurento = function (
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tag,
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voiceBridge,
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userId,
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internalMeetingId,
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onFail = null,
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chromeExtension = null,
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userName = null,
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caleeName = null,
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onSuccess = null
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) {
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this.ws = null;
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this.video = null;
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this.screen = null;
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this.webRtcPeer = null;
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this.mediaCallback = null;
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this.voiceBridge = voiceBridge;
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this.internalMeetingId = internalMeetingId;
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this.userId = userId;
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this.userName = userName;
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this.caleeName = caleeName;
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// Limiting max resolution to WQXGA
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// In FireFox we force full screen share and in the case
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// of multiple screens the total area shared becomes too large
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this.vid_max_width = 2560;
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this.vid_max_height = 1600;
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this.width = window.screen.width;
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this.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.userId = userId;
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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.pingInterval = 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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const _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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if (onSuccess != null) {
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this.onSuccess = Kurento.normalizeCallback(onSuccess);
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} else {
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var _this = this;
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this.onSuccess = function () {
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_this.logSuccess('Default success 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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this.kurentoAudio = 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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if (this.kurentoScreenshare.pingInterval) {
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clearInterval(this.kurentoScreenshare.pingInterval);
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}
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this.kurentoScreenshare.dispose();
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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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if (this.kurentoVideo.pingInterval) {
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clearInterval(this.kurentoVideo.pingInterval);
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}
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this.kurentoVideo.dispose();
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this.kurentoVideo = null;
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}
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};
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KurentoManager.prototype.exitAudio = function () {
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console.log(' [exitAudio] Exiting listen only audio');
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if (typeof this.kurentoAudio !== 'undefined' && this.kurentoAudio) {
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if (this.kurentoAudio.ws !== null) {
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this.kurentoAudio.ws.onclose = function () {};
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this.kurentoAudio.ws.close();
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}
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this.kurentoAudio.dispose();
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this.kurentoAudio = null;
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}
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if (this.kurentoAudio) {
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this.kurentoAudio = 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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const 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.setScreensharing(tag);
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};
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KurentoManager.prototype.joinWatchVideo = function (tag) {
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this.exitVideo();
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const 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.fetchStunTurnServer = function (callback) {
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let iceServers = [];
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const handleFetchError = function (response) {
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console.error("[screenshare] Could not fetch stun/turn servers, using default");
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callback(iceServers);
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}
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BBB.getSessionToken(function(sessionToken) {
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$.ajax({
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dataType: 'json',
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url: '/bigbluebutton/api/stuns',
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data: {sessionToken:sessionToken}
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}).done(function(data) {
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if (data.response && data.response.returncode === 'FAILED') {
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return handleFetchError(data);
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}
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let stuns = data['stunServers'].map(function (s) {
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return { urls : s.url };
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});
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let turns = data['turnServers'].map(function (t) {
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return { urls: t.url, username: t.username, credential: t.password };
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});
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iceServers = stuns.concat(turns);
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return callback(iceServers);
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}).fail(function(data, textStatus, errorThrown) {
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return handleFetchError(data);
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});
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});
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}
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Kurento.prototype.addIceServers = function (callback) {
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let configuration;
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this.fetchStunTurnServer(function (iceServers) {
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if (iceServers && iceServers.length > 0) {
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configuration = {};
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configuration.iceServers = iceServers;
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}
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return callback(configuration);
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});
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};
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Kurento.prototype.setScreensharing = function (tag) {
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this.mediaCallback = this.startScreensharing.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.init();
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};
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Kurento.prototype.downscaleResolution = function (oldWidth, oldHeight) {
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const factorWidth = this.vid_max_width / oldWidth;
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const factorHeight = this.vid_max_height / oldHeight;
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let width, height;
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if (factorWidth < factorHeight) {
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width = Math.trunc(oldWidth * factorWidth);
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height = Math.trunc(oldHeight * factorWidth);
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}
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else {
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width = Math.trunc(oldWidth * factorHeight);
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height = Math.trunc(oldHeight * factorHeight);
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}
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return { width, height };
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};
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Kurento.prototype.init = function () {
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const 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.pingInterval = setInterval(self.ping.bind(self), PING_INTERVAL);
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self.mediaCallback();
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};
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} else { 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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const parsedMessage = JSON.parse(message.data);
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switch (parsedMessage.id) {
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case 'startResponse':
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this.startResponse(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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case 'webRTCAudioSuccess':
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this.onSuccess(parsedMessage.success);
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break;
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case 'webRTCAudioError':
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this.onFail(parsedMessage.error);
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break;
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case 'pong':
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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.startResponse = function (message) {
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if (message.response !== 'accepted') {
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const 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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switch (message.type) {
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case 'screenshare':
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if (message.role === SEND_ROLE) {
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kurentoManager.exitScreenShare();
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}
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else if (message.role === RECV_ROLE) {
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kurentoManager.exitVideo();
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}
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break;
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case 'audio':
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kurentoManager.exitAudio();
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break;
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}
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} else {
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console.debug(`Procedure for`, message.type, `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.onOfferPresenter = function (error, offerSdp) {
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const 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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const message = {
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id: 'start',
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type: SFU_APP,
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role: SEND_ROLE,
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internalMeetingId: self.internalMeetingId,
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voiceBridge: self.voiceBridge,
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callerName: self.userId,
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sdpOffer: offerSdp,
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vh: this.height,
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vw: this.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.startScreensharing = function () {
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if (window.chrome) {
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if (!this.chromeExtension) {
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this.logError({
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status: 'failed',
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message: 'Missing Chrome Extension key',
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});
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this.onFail();
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return;
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}
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}
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const options = {
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localVideo: document.getElementById(this.renderTag),
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onicecandidate: (candidate) => {
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this.onIceCandidate(candidate, SEND_ROLE);
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},
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sendSource: 'desktop',
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};
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this.addIceServers((configuration) => {
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if (configuration) {
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options.configuration = configuration;
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}
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console.log(` Peer options => ${JSON.stringify(options, null, 2)}`);
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let resolution;
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console.debug("Screenshare screen dimensions are", this.width, "x", this.height);
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if (this.width > this.vid_max_width || this.height > this.vid_max_height) {
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resolution = this.downscaleResolution(this.width, this.height);
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this.width = resolution.width;
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this.height = resolution.height;
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console.debug("Screenshare track dimensions have been resized to", this.width, "x", this.height);
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}
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this.webRtcPeer = kurentoUtils.WebRtcPeer.WebRtcPeerSendonly(options, (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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//this.onFail(error);
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return kurentoManager.exitScreenShare();
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}
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this.webRtcPeer.generateOffer(this.onOfferPresenter.bind(this));
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console.log(`Generated peer offer w/ options ${JSON.stringify(options)}`);
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const localStream = this.webRtcPeer.peerConnection.getLocalStreams()[0];
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localStream.getVideoTracks()[0].onended = function () {
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return kurentoManager.exitScreenShare();
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};
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localStream.getVideoTracks()[0].oninactive = function () {
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return kurentoManager.exitScreenShare();
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};
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});
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});
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};
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Kurento.prototype.onIceCandidate = function (candidate, role) {
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const self = this;
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console.log(`Local candidate${JSON.stringify(candidate)}`);
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const message = {
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id: ON_ICE_CANDIDATE_MSG,
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role: role,
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type: SFU_APP,
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voiceBridge: self.voiceBridge,
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candidate,
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callerName: self.userId,
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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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const self = this;
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if (!this.webRtcPeer) {
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const options = {
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mediaConstraints: {
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audio: false
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},
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remoteVideo: document.getElementById(this.renderTag),
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onicecandidate: (candidate) => {
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this.onIceCandidate(candidate, RECV_ROLE);
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}
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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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const 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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const message = {
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id: 'start',
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type: SFU_APP,
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role: RECV_ROLE,
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internalMeetingId: self.internalMeetingId,
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voiceBridge: self.voiceBridge,
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callerName: self.userId,
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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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KurentoManager.prototype.joinAudio = function (tag) {
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this.exitAudio();
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var obj = Object.create(Kurento.prototype);
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Kurento.apply(obj, arguments);
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this.kurentoAudio= obj;
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this.kurentoAudio.setAudio(tag);
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};
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Kurento.prototype.setAudio = function (tag) {
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this.mediaCallback = this.listenOnly.bind(this);
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this.create(tag);
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};
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Kurento.prototype.listenOnly = function () {
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var self = this;
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if (!this.webRtcPeer) {
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this.addIceServers((configuration) => {
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let options = {
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remoteVideo: document.getElementById(this.renderTag),
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onicecandidate : this.onListenOnlyIceCandidate.bind(this),
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mediaConstraints: {
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audio:true,
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video:false
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}
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}
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if (configuration) {
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options.configuration = configuration;
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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(PEER_ERROR);
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}
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this.generateOffer(self.onOfferListenOnly.bind(self));
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});
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});
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}
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};
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Kurento.prototype.onListenOnlyIceCandidate = function (candidate) {
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let self = this;
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console.debug("[onListenOnlyIceCandidate]", JSON.stringify(candidate));
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var message = {
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id : 'iceCandidate',
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type: 'audio',
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role: 'viewer',
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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.onOfferListenOnly = function (error, offerSdp) {
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let self = this;
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if(error) {
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console.error("[onOfferListenOnly]", error);
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return this.onFail(SDP_ERROR);
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}
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let message = {
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id : 'start',
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type: 'audio',
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role: 'viewer',
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voiceBridge: self.voiceBridge,
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caleeName: self.caleeName,
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sdpOffer : offerSdp,
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userId: self.userId,
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userName: self.userName,
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internalMeetingId: self.internalMeetingId
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};
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console.debug("[onOfferListenOnly]", JSON.stringify(message, null, 2));
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this.sendMessage(message);
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};
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Kurento.prototype.pauseTrack = function (message) {
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const localStream = this.webRtcPeer.peerConnection.getLocalStreams()[0];
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const track = localStream.getVideoTracks()[0];
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if (track) {
|
|
track.enabled = false;
|
|
}
|
|
}
|
|
|
|
Kurento.prototype.resumeTrack = function (message) {
|
|
const localStream = this.webRtcPeer.peerConnection.getLocalStreams()[0];
|
|
const track = localStream.getVideoTracks()[0];
|
|
|
|
if (track) {
|
|
track.enabled = true;
|
|
}
|
|
}
|
|
|
|
Kurento.prototype.stop = function () {
|
|
// if (this.webRtcPeer) {
|
|
// var message = {
|
|
// id : 'stop',
|
|
// type : 'screenshare',
|
|
// voiceBridge: kurentoHandler.voiceBridge
|
|
// }
|
|
// kurentoHandler.sendMessage(message);
|
|
// kurentoHandler.disposeScreenShare();
|
|
// }
|
|
};
|
|
|
|
Kurento.prototype.dispose = function () {
|
|
if (this.webRtcPeer) {
|
|
this.webRtcPeer.dispose();
|
|
this.webRtcPeer = null;
|
|
}
|
|
};
|
|
|
|
Kurento.prototype.ping = function () {
|
|
const message = {
|
|
id: 'ping'
|
|
};
|
|
this.sendMessage(message);
|
|
}
|
|
|
|
Kurento.prototype.sendMessage = function (message) {
|
|
const jsonMessage = JSON.stringify(message);
|
|
console.debug(`Sending message: ${jsonMessage}`);
|
|
this.ws.send(jsonMessage);
|
|
};
|
|
|
|
Kurento.prototype.logger = function (obj) {
|
|
console.log(obj);
|
|
};
|
|
|
|
Kurento.prototype.logError = function (obj) {
|
|
console.error(obj);
|
|
};
|
|
|
|
|
|
Kurento.normalizeCallback = function (callback) {
|
|
if (typeof callback === 'function') {
|
|
return callback;
|
|
}
|
|
console.log(document.getElementById('BigBlueButton')[callback]);
|
|
return function (args) {
|
|
document.getElementById('BigBlueButton')[callback](args);
|
|
};
|
|
};
|
|
|
|
/* Global methods */
|
|
|
|
// this function explains how to use above methods/objects
|
|
window.getScreenConstraints = function (sendSource, callback) {
|
|
const screenConstraints = { video: {}, audio: false };
|
|
|
|
// Limiting FPS to a range of 5-10 (5 ideal)
|
|
screenConstraints.video.frameRate = { ideal: 5, max: 10 };
|
|
|
|
screenConstraints.video.height = { max: kurentoManager.kurentoScreenshare.vid_max_height };
|
|
screenConstraints.video.width = { max: kurentoManager.kurentoScreenshare.vid_max_width };
|
|
|
|
if (isChrome) {
|
|
getChromeScreenConstraints((constraints) => {
|
|
if (!constraints) {
|
|
document.dispatchEvent(new Event('installChromeExtension'));
|
|
return;
|
|
}
|
|
|
|
const sourceId = constraints.streamId;
|
|
|
|
kurentoManager.kurentoScreenshare.extensionInstalled = true;
|
|
|
|
// this statement sets gets 'sourceId" and sets "chromeMediaSourceId"
|
|
screenConstraints.video.chromeMediaSource = { exact: [sendSource] };
|
|
screenConstraints.video.chromeMediaSourceId = sourceId;
|
|
screenConstraints.optional = [
|
|
{ googCpuOveruseDetection: true },
|
|
{ googCpuOveruseEncodeUsage: true },
|
|
{ googCpuUnderuseThreshold: 55 },
|
|
{ googCpuOveruseThreshold: 100},
|
|
{ googPayloadPadding: true },
|
|
{ googScreencastMinBitrate: 600 },
|
|
{ googHighStartBitrate: true },
|
|
{ googHighBitrate: true },
|
|
{ googVeryHighBitrate: true }
|
|
];
|
|
|
|
console.log('getScreenConstraints for Chrome returns => ', screenConstraints);
|
|
// now invoking native getUserMedia API
|
|
callback(null, screenConstraints);
|
|
}, chromeExtension);
|
|
} else if (isFirefox) {
|
|
screenConstraints.video.mediaSource = 'window';
|
|
|
|
console.log('getScreenConstraints for Firefox returns => ', screenConstraints);
|
|
// now invoking native getUserMedia API
|
|
callback(null, screenConstraints);
|
|
} else if (isSafari) {
|
|
screenConstraints.video.mediaSource = 'screen';
|
|
|
|
console.log('getScreenConstraints for Safari returns => ', screenConstraints);
|
|
// now invoking native getUserMedia API
|
|
callback(null, screenConstraints);
|
|
}
|
|
};
|
|
|
|
window.kurentoInitialize = function () {
|
|
if (window.kurentoManager == null || window.KurentoManager === undefined) {
|
|
window.kurentoManager = new KurentoManager();
|
|
}
|
|
};
|
|
|
|
window.kurentoShareScreen = function () {
|
|
window.kurentoInitialize();
|
|
window.kurentoManager.shareScreen.apply(window.kurentoManager, arguments);
|
|
};
|
|
|
|
|
|
window.kurentoExitScreenShare = function () {
|
|
window.kurentoInitialize();
|
|
window.kurentoManager.exitScreenShare();
|
|
};
|
|
|
|
window.kurentoWatchVideo = function () {
|
|
window.kurentoInitialize();
|
|
window.kurentoManager.joinWatchVideo.apply(window.kurentoManager, arguments);
|
|
};
|
|
|
|
window.kurentoExitVideo = function () {
|
|
window.kurentoInitialize();
|
|
window.kurentoManager.exitVideo();
|
|
};
|
|
|
|
window.kurentoJoinAudio = function () {
|
|
window.kurentoInitialize();
|
|
window.kurentoManager.joinAudio.apply(window.kurentoManager, arguments);
|
|
};
|
|
|
|
window.kurentoExitAudio = function () {
|
|
window.kurentoInitialize();
|
|
window.kurentoManager.exitAudio();
|
|
};
|
|
|
|
window.getChromeScreenConstraints = function (callback, extensionId) {
|
|
chrome.runtime.sendMessage(
|
|
extensionId, {
|
|
getStream: true,
|
|
sources: [
|
|
'screen',
|
|
'window',
|
|
],
|
|
},
|
|
(response) => {
|
|
console.log(response);
|
|
callback(response);
|
|
},
|
|
);
|
|
};
|
|
|
|
// a function to check whether the browser (Chrome only) is in an isIncognito
|
|
// session. Requires 1 mandatory callback that only gets called if the browser
|
|
// session is incognito. The callback for not being incognito is optional.
|
|
// Attempts to retrieve the chrome filesystem API.
|
|
window.checkIfIncognito = function(isIncognito, isNotIncognito = function () {}) {
|
|
isIncognito = Kurento.normalizeCallback(isIncognito);
|
|
isNotIncognito = Kurento.normalizeCallback(isNotIncognito);
|
|
|
|
var fs = window.RequestFileSystem || window.webkitRequestFileSystem;
|
|
if (!fs) {
|
|
isNotIncognito();
|
|
return;
|
|
}
|
|
fs(window.TEMPORARY, 100, function(){isNotIncognito()}, function(){isIncognito()});
|
|
};
|
|
|
|
window.checkChromeExtInstalled = function (callback, chromeExtensionId) {
|
|
callback = Kurento.normalizeCallback(callback);
|
|
|
|
if (typeof chrome === "undefined" || !chrome || !chrome.runtime) {
|
|
// No API, so no extension for sure
|
|
callback(false);
|
|
return;
|
|
}
|
|
chrome.runtime.sendMessage(
|
|
chromeExtensionId,
|
|
{ getVersion: true },
|
|
function (response) {
|
|
if (!response || !response.version) {
|
|
// Communication failure - assume that no endpoint exists
|
|
callback(false);
|
|
return;
|
|
}
|
|
callback(true);
|
|
}
|
|
);
|
|
}
|