554 lines
19 KiB
JavaScript
554 lines
19 KiB
JavaScript
/* global config, require, attachMediaStream, getUserMedia */
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var RTCBrowserType = require("./RTCBrowserType");
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var Resolutions = require("../../service/RTC/Resolutions");
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var AdapterJS = require("./adapter.screenshare");
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var SDPUtil = require("../xmpp/SDPUtil");
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var currentResolution = null;
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function getPreviousResolution(resolution) {
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if(!Resolutions[resolution])
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return null;
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var order = Resolutions[resolution].order;
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var res = null;
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var resName = null;
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for(var i in Resolutions) {
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var tmp = Resolutions[i];
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if(res == null || (res.order < tmp.order && tmp.order < order)) {
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resName = i;
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res = tmp;
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}
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}
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return resName;
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}
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function setResolutionConstraints(constraints, resolution, isAndroid) {
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if (Resolutions[resolution]) {
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constraints.video.mandatory.minWidth = Resolutions[resolution].width;
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constraints.video.mandatory.minHeight = Resolutions[resolution].height;
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}
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else if (isAndroid) {
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// FIXME can't remember if the purpose of this was to always request
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// low resolution on Android ? if yes it should be moved up front
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constraints.video.mandatory.minWidth = 320;
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constraints.video.mandatory.minHeight = 240;
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constraints.video.mandatory.maxFrameRate = 15;
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}
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if (constraints.video.mandatory.minWidth)
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constraints.video.mandatory.maxWidth =
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constraints.video.mandatory.minWidth;
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if (constraints.video.mandatory.minHeight)
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constraints.video.mandatory.maxHeight =
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constraints.video.mandatory.minHeight;
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}
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function getConstraints(um, resolution, bandwidth, fps, desktopStream, isAndroid)
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{
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var constraints = {audio: false, video: false};
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if (um.indexOf('video') >= 0) {
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// same behaviour as true
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constraints.video = { mandatory: {}, optional: [] };
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constraints.video.optional.push({ googLeakyBucket: true });
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setResolutionConstraints(constraints, resolution, isAndroid);
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}
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if (um.indexOf('audio') >= 0) {
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if (!RTCBrowserType.isFirefox()) {
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// same behaviour as true
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constraints.audio = { mandatory: {}, optional: []};
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// if it is good enough for hangouts...
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constraints.audio.optional.push(
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{googEchoCancellation: true},
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{googAutoGainControl: true},
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{googNoiseSupression: true},
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{googHighpassFilter: true},
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{googNoisesuppression2: true},
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{googEchoCancellation2: true},
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{googAutoGainControl2: true}
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);
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} else {
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constraints.audio = true;
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}
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}
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if (um.indexOf('screen') >= 0) {
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if (RTCBrowserType.isChrome()) {
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constraints.video = {
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mandatory: {
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chromeMediaSource: "screen",
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googLeakyBucket: true,
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maxWidth: window.screen.width,
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maxHeight: window.screen.height,
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maxFrameRate: 3
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},
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optional: []
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};
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} else if (RTCBrowserType.isTemasysPluginUsed()) {
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constraints.video = {
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optional: [
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{
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sourceId: AdapterJS.WebRTCPlugin.plugin.screensharingKey
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}
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]
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};
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} else {
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console.error(
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"'screen' WebRTC media source is supported only in Chrome" +
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" and with Temasys plugin");
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}
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}
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if (um.indexOf('desktop') >= 0) {
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constraints.video = {
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mandatory: {
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chromeMediaSource: "desktop",
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chromeMediaSourceId: desktopStream,
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googLeakyBucket: true,
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maxWidth: window.screen.width,
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maxHeight: window.screen.height,
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maxFrameRate: 3
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},
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optional: []
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};
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}
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if (bandwidth) {
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if (!constraints.video) {
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//same behaviour as true
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constraints.video = {mandatory: {}, optional: []};
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}
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constraints.video.optional.push({bandwidth: bandwidth});
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}
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if (fps) {
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// for some cameras it might be necessary to request 30fps
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// so they choose 30fps mjpg over 10fps yuy2
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if (!constraints.video) {
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// same behaviour as true;
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constraints.video = {mandatory: {}, optional: []};
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}
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constraints.video.mandatory.minFrameRate = fps;
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}
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return constraints;
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}
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function RTCUtils(RTCService, onTemasysPluginReady)
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{
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var self = this;
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this.service = RTCService;
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if (RTCBrowserType.isFirefox()) {
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var FFversion = RTCBrowserType.getFirefoxVersion();
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if (FFversion >= 40) {
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this.peerconnection = mozRTCPeerConnection;
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this.getUserMedia = navigator.mozGetUserMedia.bind(navigator);
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this.pc_constraints = {};
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this.attachMediaStream = function (element, stream) {
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// srcObject is being standardized and FF will eventually
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// support that unprefixed. FF also supports the
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// "element.src = URL.createObjectURL(...)" combo, but that
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// will be deprecated in favour of srcObject.
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//
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// https://groups.google.com/forum/#!topic/mozilla.dev.media/pKOiioXonJg
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// https://github.com/webrtc/samples/issues/302
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if(!element[0])
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return;
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element[0].mozSrcObject = stream;
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element[0].play();
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};
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this.getStreamID = function (stream) {
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var id = stream.id;
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if (!id) {
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var tracks = stream.getVideoTracks();
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if (!tracks || tracks.length === 0) {
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tracks = stream.getAudioTracks();
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}
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id = tracks[0].id;
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}
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return SDPUtil.filter_special_chars(id);
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};
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this.getVideoSrc = function (element) {
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if(!element)
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return null;
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return element.mozSrcObject;
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};
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this.setVideoSrc = function (element, src) {
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if(element)
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element.mozSrcObject = src;
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};
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RTCSessionDescription = mozRTCSessionDescription;
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RTCIceCandidate = mozRTCIceCandidate;
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} else {
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console.error(
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"Firefox version too old: " + FFversion + ". Required >= 40.");
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window.location.href = 'unsupported_browser.html';
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return;
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}
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} else if (RTCBrowserType.isChrome() || RTCBrowserType.isOpera()) {
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this.peerconnection = webkitRTCPeerConnection;
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this.getUserMedia = navigator.webkitGetUserMedia.bind(navigator);
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this.attachMediaStream = function (element, stream) {
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element.attr('src', webkitURL.createObjectURL(stream));
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};
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this.getStreamID = function (stream) {
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// streams from FF endpoints have the characters '{' and '}'
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// that make jQuery choke.
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return SDPUtil.filter_special_chars(stream.id);
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};
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this.getVideoSrc = function (element) {
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if(!element)
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return null;
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return element.getAttribute("src");
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};
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this.setVideoSrc = function (element, src) {
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if(element)
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element.setAttribute("src", src);
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};
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// DTLS should now be enabled by default but..
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this.pc_constraints = {'optional': [{'DtlsSrtpKeyAgreement': 'true'}]};
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if (navigator.userAgent.indexOf('Android') != -1) {
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this.pc_constraints = {}; // disable DTLS on Android
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}
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if (!webkitMediaStream.prototype.getVideoTracks) {
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webkitMediaStream.prototype.getVideoTracks = function () {
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return this.videoTracks;
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};
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}
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if (!webkitMediaStream.prototype.getAudioTracks) {
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webkitMediaStream.prototype.getAudioTracks = function () {
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return this.audioTracks;
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};
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}
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}
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// Detect IE/Safari
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else if (RTCBrowserType.isTemasysPluginUsed()) {
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//AdapterJS.WebRTCPlugin.setLogLevel(
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// AdapterJS.WebRTCPlugin.PLUGIN_LOG_LEVELS.VERBOSE);
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AdapterJS.webRTCReady(function (isPlugin) {
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self.peerconnection = RTCPeerConnection;
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self.getUserMedia = getUserMedia;
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self.attachMediaStream = function (elSel, stream) {
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if (stream.id === "dummyAudio" || stream.id === "dummyVideo") {
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return;
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}
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attachMediaStream(elSel[0], stream);
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};
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self.getStreamID = function (stream) {
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var id = SDPUtil.filter_special_chars(stream.label);
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return id;
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};
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self.getVideoSrc = function (element) {
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if (!element) {
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console.warn("Attempt to get video SRC of null element");
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return null;
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}
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var children = element.children;
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for (var i = 0; i !== children.length; ++i) {
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if (children[i].name === 'streamId') {
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return children[i].value;
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}
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}
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//console.info(element.id + " SRC: " + src);
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return null;
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};
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self.setVideoSrc = function (element, src) {
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//console.info("Set video src: ", element, src);
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if (!src) {
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console.warn("Not attaching video stream, 'src' is null");
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return;
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}
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AdapterJS.WebRTCPlugin.WaitForPluginReady();
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var stream = AdapterJS.WebRTCPlugin.plugin
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.getStreamWithId(AdapterJS.WebRTCPlugin.pageId, src);
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attachMediaStream(element, stream);
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};
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onTemasysPluginReady(isPlugin);
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});
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} else {
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try {
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console.log('Browser does not appear to be WebRTC-capable');
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} catch (e) { }
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window.location.href = 'unsupported_browser.html';
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}
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}
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RTCUtils.prototype.getUserMediaWithConstraints = function(
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um, success_callback, failure_callback, resolution,bandwidth, fps,
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desktopStream) {
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currentResolution = resolution;
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// Check if we are running on Android device
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var isAndroid = navigator.userAgent.indexOf('Android') != -1;
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var constraints = getConstraints(
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um, resolution, bandwidth, fps, desktopStream, isAndroid);
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console.info("Get media constraints", constraints);
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var self = this;
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try {
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this.getUserMedia(constraints,
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function (stream) {
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console.log('onUserMediaSuccess');
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self.setAvailableDevices(um, true);
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success_callback(stream);
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},
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function (error) {
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self.setAvailableDevices(um, false);
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console.warn('Failed to get access to local media. Error ',
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error, constraints);
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if (failure_callback) {
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failure_callback(error);
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}
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});
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} catch (e) {
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console.error('GUM failed: ', e);
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if(failure_callback) {
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failure_callback(e);
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}
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}
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};
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RTCUtils.prototype.setAvailableDevices = function (um, available) {
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var devices = {};
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if(um.indexOf("video") != -1) {
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devices.video = available;
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}
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if(um.indexOf("audio") != -1) {
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devices.audio = available;
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}
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this.service.setDeviceAvailability(devices);
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};
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/**
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* We ask for audio and video combined stream in order to get permissions and
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* not to ask twice.
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*/
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RTCUtils.prototype.obtainAudioAndVideoPermissions =
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function(devices, callback, usageOptions)
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{
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var self = this;
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// Get AV
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var successCallback = function (stream) {
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if(callback)
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callback(stream, usageOptions);
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else
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self.successCallback(stream, usageOptions);
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};
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if(!devices)
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devices = ['audio', 'video'];
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var newDevices = [];
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if(usageOptions)
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for(var i = 0; i < devices.length; i++) {
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var device = devices[i];
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if(usageOptions[device] === true)
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newDevices.push(device);
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}
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else
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newDevices = devices;
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if(newDevices.length === 0) {
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successCallback();
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return;
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}
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if (RTCBrowserType.isFirefox() || RTCBrowserType.isTemasysPluginUsed()) {
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// With FF/IE we can't split the stream into audio and video because FF
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// doesn't support media stream constructors. So, we need to get the
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// audio stream separately from the video stream using two distinct GUM
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// calls. Not very user friendly :-( but we don't have many other
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// options neither.
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//
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// Note that we pack those 2 streams in a single object and pass it to
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// the successCallback method.
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var obtainVideo = function (audioStream) {
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self.getUserMediaWithConstraints(
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['video'],
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function (videoStream) {
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return successCallback({
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audioStream: audioStream,
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videoStream: videoStream
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});
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},
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function (error) {
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console.error(
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'failed to obtain video stream - stop', error);
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self.errorCallback(error);
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},
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config.resolution || '360');
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};
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var obtainAudio = function () {
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self.getUserMediaWithConstraints(
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['audio'],
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function (audioStream) {
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if (newDevices.indexOf('video') !== -1)
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obtainVideo(audioStream);
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},
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function (error) {
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console.error(
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'failed to obtain audio stream - stop', error);
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self.errorCallback(error);
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}
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);
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};
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if (newDevices.indexOf('audio') !== -1) {
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obtainAudio();
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} else {
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obtainVideo(null);
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}
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} else {
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this.getUserMediaWithConstraints(
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newDevices,
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function (stream) {
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successCallback(stream);
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},
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function (error) {
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self.errorCallback(error);
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},
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config.resolution || '360');
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}
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};
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RTCUtils.prototype.successCallback = function (stream, usageOptions) {
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// If this is FF or IE, the stream parameter is *not* a MediaStream object,
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// it's an object with two properties: audioStream, videoStream.
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if (stream && stream.getAudioTracks && stream.getVideoTracks)
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console.log('got', stream, stream.getAudioTracks().length,
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stream.getVideoTracks().length);
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this.handleLocalStream(stream, usageOptions);
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};
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RTCUtils.prototype.errorCallback = function (error) {
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var self = this;
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console.error('failed to obtain audio/video stream - trying audio only', error);
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var resolution = getPreviousResolution(currentResolution);
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if(typeof error == "object" && error.constraintName && error.name
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&& (error.name == "ConstraintNotSatisfiedError" ||
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error.name == "OverconstrainedError") &&
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(error.constraintName == "minWidth" || error.constraintName == "maxWidth" ||
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error.constraintName == "minHeight" || error.constraintName == "maxHeight")
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&& resolution != null)
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{
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self.getUserMediaWithConstraints(['audio', 'video'],
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function (stream) {
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return self.successCallback(stream);
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}, function (error) {
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return self.errorCallback(error);
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}, resolution);
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}
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else {
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self.getUserMediaWithConstraints(
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['audio'],
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function (stream) {
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return self.successCallback(stream);
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},
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function (error) {
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console.error('failed to obtain audio/video stream - stop',
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error);
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return self.successCallback(null);
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}
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);
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}
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};
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RTCUtils.prototype.handleLocalStream = function(stream, usageOptions) {
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// If this is FF, the stream parameter is *not* a MediaStream object, it's
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// an object with two properties: audioStream, videoStream.
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var audioStream, videoStream;
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if(window.webkitMediaStream)
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{
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audioStream = new webkitMediaStream();
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videoStream = new webkitMediaStream();
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if(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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audioStream.addTrack(audioTracks[i]);
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}
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var videoTracks = stream.getVideoTracks();
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for (i = 0; i < videoTracks.length; i++) {
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videoStream.addTrack(videoTracks[i]);
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}
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}
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}
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else if (RTCBrowserType.isFirefox() || RTCBrowserType.isTemasysPluginUsed())
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{ // Firefox and Temasys plugin
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if (stream && stream.audioStream)
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audioStream = stream.audioStream;
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else
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audioStream = new DummyMediaStream("dummyAudio");
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if (stream && stream.videoStream)
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videoStream = stream.videoStream;
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else
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videoStream = new DummyMediaStream("dummyVideo");
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}
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var audioMuted = (usageOptions && usageOptions.audio === false),
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videoMuted = (usageOptions && usageOptions.video === false);
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var audioGUM = (!usageOptions || usageOptions.audio !== false),
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videoGUM = (!usageOptions || usageOptions.video !== false);
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this.service.createLocalStream(audioStream, "audio", null, null,
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audioMuted, audioGUM);
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this.service.createLocalStream(videoStream, "video", null, 'camera',
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videoMuted, videoGUM);
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};
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function DummyMediaStream(id) {
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this.id = id;
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this.label = id;
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this.stop = function() { };
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this.getAudioTracks = function() { return []; };
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this.getVideoTracks = function() { return []; };
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}
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RTCUtils.prototype.createStream = function(stream, isVideo) {
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var newStream = null;
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if (window.webkitMediaStream) {
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newStream = new webkitMediaStream();
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if (newStream) {
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var tracks = (isVideo ? stream.getVideoTracks() : stream.getAudioTracks());
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for (var i = 0; i < tracks.length; i++) {
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newStream.addTrack(tracks[i]);
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}
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}
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}
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else {
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// FIXME: this is duplicated with 'handleLocalStream' !!!
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if (stream) {
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newStream = stream;
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} else {
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newStream =
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new DummyMediaStream(isVideo ? "dummyVideo" : "dummyAudio");
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}
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}
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return newStream;
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};
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module.exports = RTCUtils;
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