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import "./external/loglevel.min.js";
import {isAndroid} from "./utility.js";
const Logger = window.log;
/**
* Media management class is responsible to manage audio and video
* sources and tracks management for the local stream.
* Also audio and video properties (like bitrate) are managed by this class .
*/
export class MediaManager {
/**
*
* @param {object} initialValues
*/
constructor(initialValues) {
/**
* the maximum bandwith value that browser can send a stream
* keep in mind that browser may send video less than this value
*/
this.bandwidth = 1200; //kbps
/**
* This flags enables/disables debug logging
*/
this.debug = false;
/**
* The cam_location below is effective when camera and screen is send at the same time.
* possible values are top and bottom. It's on right all the time
*/
this.camera_location = "top"
/**
* The cam_margin below is effective when camera and screen is send at the same time.
* This is the margin value in px from the edges
*/
this.camera_margin = 15;
/**
* this camera_percent is how large the camera view appear on the screen. It's %15 by default.
*/
this.camera_percent = 15;
/**
* initial media constraints provided by the user
* @type {MediaStreamConstraints}
*/
this.mediaConstraints = {
/** @type {MediaTrackConstraints} */
video: true,
/** @type {MediaTrackConstraints} */
audio: true
};
;
/**
* this is the callback function to get video/audio sender from WebRTCAdaptor
*/
this.getSender = initialValues.getSender;
/**
* This is the Stream Id for the publisher.
*/
this.publishStreamId = null;
/**
* this is the object of the local stream to publish
* it is initiated in initLocalStream method
*/
this.localStream = null;
/**
* publish mode is determined by the user and set by @mediaConstraints.video
* It may be camera, screen, screen+camera
*/
this.publishMode = "camera"; //screen, screen+camera
/**
* Default callback. It's overriden below if it exists
*/
this.callback = (info, obj) => {
Logger.debug("Callback info: " + info + " object: " + typeof obj !== undefined ? JSON.stringify(obj) : "");
};
/**
* Default callback error implementation. It's overriden below if it exists
*/
this.callbackError = (err) => {
Logger.error(err)
}
/**
* volume-meter-process.js file to find directly. You can locate the file to your assets
*/
this.volumeMeterUrl = 'volume-meter-processor.js';
/**
* The values of the above fields are provided as user parameters by the constructor.
* TODO: Also some other hidden parameters may be passed here
*/
for (var key in initialValues.userParameters) {
Eif (initialValues.userParameters.hasOwnProperty(key)) {
this[key] = initialValues.userParameters[key];
}
}
//set the callback if it's defined
Eif (initialValues.callback) {
this.callback = initialValues.callback;
}
//set the callbackError if it's defined
Eif (initialValues.callbackError) {
this.callbackError = initialValues.callbackError;
}
/**
* current volume value which is set by the user
*/
this.currentVolume = null;
/**
* Keeps the audio track to be closed in case of audio track change
*/
this.previousAudioTrack = null;
/**
* silent audio track for switching between dummy track to real tracks on the fly
*/
this.silentAudioTrack = null;
/**
* The screen video track in screen+camera mode
*/
this.desktopStream = null;
/**
* The camera (overlay) video track in screen+camera mode
*/
this.smallVideoTrack = null;
/**
* black video track for switching between dummy video track to real tracks on the fly
*/
this.blackVideoTrack = null;
/**
* Audio context to use for meter, mix, gain
*/
this.audioContext = new AudioContext();
/**
* osciallator to generate silent audio
*/
this.oscillator = null;
/**
* the main audio in single audio case
* the primary audio in mixed audio case
*
* its volume can be controled
*/
this.primaryAudioTrackGainNode = null;
/**
* the secondary audio in mixed audio case
*
* its volume can be controled
*/
this.secondaryAudioTrackGainNode = null;
/**
* this is the sound meter object for the local stream
*/
this.localStreamSoundMeter = null;
/**
* this is the level callback for sound meter object
*/
this.levelCallback = null;
/**
* Timer to create black frame to publish when video is muted
*/
this.blackFrameTimer = null;
/**
* Timer to draw camera and desktop to canvas
*/
this.desktopCameraCanvasDrawerTimer = null;
/**
* For audio check when the user is muted itself.
* Check enableAudioLevelWhenMuted
*/
this.mutedAudioStream = null;
/**
* This flag is the status of audio stream
* Checking when the audio stream is updated
*/
this.isMuted = false;
/**
* meter refresh period for "are you talking?" check
*/
this.meterRefresh = null;
/**
* For keeping track of whether user turned off the camera
*/
this.cameraEnabled = true;
/**
* Replacement stream for video track when the camera is turn off
*/
this.replacementStream = null;
/**
* html video element that presents local stream
*/
this.localVideo = this.localVideoElement || document.getElementById(this.localVideoId);
//A dummy stream created to replace the tracks when camera is turned off.
this.dummyCanvas = document.createElement("canvas");
// It should be compatible with previous version
if (this.mediaConstraints) {
Iif (this.mediaConstraints.video == "camera") {
this.publishMode = "camera";
} else Iif (this.mediaConstraints.video == "screen") {
this.publishMode = "screen";
} else Iif (this.mediaConstraints.video == "screen+camera") {
this.publishMode = "screen+camera";
}
} else E{
//just define default values
this.mediaConstraints = {video: true, audio: true};
}
//Check browser support for screen share function
this.checkBrowserScreenShareSupported();
}
/**
* Called by the WebRTCAdaptor at the start if it isn't play mode
*/
initLocalStream() {
this.checkWebRTCPermissions();
if (typeof this.mediaConstraints.video != "undefined" && this.mediaConstraints.video != false)
{
return this.openStream(this.mediaConstraints);
}
else if (typeof this.mediaConstraints.audio != "undefined" && this.mediaConstraints.audio != false)
{
// get only audio
let media_audio_constraint = {audio: this.mediaConstraints.audio};
return this.navigatorUserMedia(media_audio_constraint, stream => {
return this.gotStream(stream);
}, true)
} else {
//neither video nor audio is requested
//just return null stream
Logger.debug("no media requested, just return an empty stream");
return Promise.resolve(null);
}
}
/*
* Called to checks if Websocket and media usage are allowed
*/
checkWebRTCPermissions() {
if (!("WebSocket" in window)) {
Logger.debug("WebSocket not supported.");
this.callbackError("WebSocketNotSupported");
return;
}
if (typeof navigator.mediaDevices == "undefined") {
Logger.debug("Cannot open camera and mic because of unsecure context. Please Install SSL(https)");
this.callbackError("UnsecureContext");
return;
}
if (typeof navigator.mediaDevices == "undefined" || navigator.mediaDevices == undefined || navigator.mediaDevices == null) {
this.callbackError("getUserMediaIsNotAllowed");
}
}
/*
* Called to get the available video and audio devices on the system
*/
getDevices() {
return navigator.mediaDevices.enumerateDevices().then(devices => {
let deviceArray = new Array();
let checkAudio = false
let checkVideo = false
devices.forEach(device => {
if (device.kind == "audioinput" || device.kind == "videoinput") {
deviceArray.push(device);
if (device.kind == "audioinput") {
checkAudio = true;
}
if (device.kind == "videoinput") {
checkVideo = true;
}
}
});
this.callback("available_devices", deviceArray);
//TODO: is the following part necessary. why?
if (checkAudio == false && this.localStream == null) {
Logger.debug("Audio input not found")
Logger.debug("Retrying to get user media without audio")
if (this.inputDeviceNotFoundLimit < 2) {
if (checkVideo != false) {
this.openStream({video: true, audio: false})
this.inputDeviceNotFoundLimit++;
} else {
Logger.debug("Video input not found")
alert("There is no video or audio input")
}
} else {
alert("No input device found, publish is not possible");
}
}
return deviceArray;
}).catch(err => {
Logger.error("Cannot get devices -> error name: " + err.name + ": " + err.message);
throw err;
});
}
/*
* Called to add a device change listener
*/
trackDeviceChange() {
navigator.mediaDevices.ondevicechange = () => {
this.getDevices();
}
}
/**
* This function create a canvas which combines screen video and camera video as an overlay
*
* @param {*} stream : screen share stream
* @param {*} streamId
* @param {*} onEndedCallback : callback when called on screen share stop
*/
setDesktopwithCameraSource(stream, streamId, onEndedCallback) {
this.desktopStream = stream;
return this.navigatorUserMedia({video: true, audio: false}, cameraStream => {
this.smallVideoTrack = cameraStream.getVideoTracks()[0];
//create a canvas element
var canvas = document.createElement("canvas");
var canvasContext = canvas.getContext("2d");
//create video element for screen
//var screenVideo = document.getElementById('sourceVideo');
var screenVideo = document.createElement('video');
screenVideo.srcObject = stream;
screenVideo.play();
//create video element for camera
var cameraVideo = document.createElement('video');
cameraVideo.srcObject = cameraStream;
cameraVideo.play();
var canvasStream = canvas.captureStream(15);
if (onEndedCallback != null) {
stream.getVideoTracks()[0].onended = function (event) {
onEndedCallback(event);
}
}
var promise;
if (this.localStream == null) {
promise = this.gotStream(canvasStream);
} else {
promise = this.updateVideoTrack(canvasStream, streamId, onended, null);
}
promise.then(() => {
//update the canvas
this.desktopCameraCanvasDrawerTimer = setInterval(() => {
//draw screen to canvas
canvas.width = screenVideo.videoWidth;
canvas.height = screenVideo.videoHeight;
canvasContext.drawImage(screenVideo, 0, 0, canvas.width, canvas.height);
var cameraWidth = screenVideo.videoWidth * (this.camera_percent / 100);
var cameraHeight = (cameraVideo.videoHeight / cameraVideo.videoWidth) * cameraWidth
var positionX = (canvas.width - cameraWidth) - this.camera_margin;
var positionY;
if (this.camera_location == "top") {
positionY = this.camera_margin;
} else { //if not top, make it bottom
//draw camera on right bottom corner
positionY = (canvas.height - cameraHeight) - this.camera_margin;
}
canvasContext.drawImage(cameraVideo, positionX, positionY, cameraWidth, cameraHeight);
}, 66);
});
}, true)
}
/**
* This function does these:
* 1. Remove the audio track from the stream provided if it is camera. Other case
* is screen video + system audio track. In this case audio is kept in stream.
* 2. Open audio track again if audio constaint isn't false
* 3. Make audio track Gain Node to be able to volume adjustable
* 4. If screen is shared and system audio is available then the system audio and
* opened audio track are mixed
*
* @param {*} mediaConstraints
* @param {*} audioConstraint
* @param {*} stream
* @param {*} streamId
*/
prepareStreamTracks(mediaConstraints, audioConstraint, stream, streamId) {
//this trick, getting audio and video separately, make us add or remove tracks on the fly
var audioTracks = stream.getAudioTracks()
if (audioTracks.length > 0 && this.publishMode == "camera") {
audioTracks[0].stop();
stream.removeTrack(audioTracks[0]);
}
//now get only audio to add this stream
if (audioConstraint != "undefined" && audioConstraint != false) {
var media_audio_constraint = {audio: audioConstraint};
return this.navigatorUserMedia(media_audio_constraint).then((audioStream) => {
//here audioStream has onr audio track only
audioStream = this.setGainNodeStream(audioStream);
// now audio stream has two audio strams.
// 1. Gain Node : this will be added to local stream to publish
// 2. Original audio track : keep its reference to stop later
//add callback if desktop is sharing
var onended = event => {
this.callback("screen_share_stopped");
this.setVideoCameraSource(streamId, mediaConstraints, null, true);
}
if (this.publishMode == "screen") {
return this.updateVideoTrack(stream, streamId, onended, true).then(() => {
if (audioTracks.length > 0) { //system audio share case, then mix it with device audio
audioStream = this.mixAudioStreams(stream, audioStream);
}
return this.updateAudioTrack(audioStream, streamId, null);
});
} else if (this.publishMode == "screen+camera") {
if (audioTracks.length > 0) { //system audio share case, then mix it with device audio
audioStream = this.mixAudioStreams(stream, audioStream);
}
return this.updateAudioTrack(audioStream, streamId, null).then(() => {
return this.setDesktopwithCameraSource(stream, streamId, onended);
});
} else {
if (audioConstraint != false && audioConstraint != undefined) {
stream.addTrack(audioStream.getAudioTracks()[0]);
}
if (stream.getVideoTracks().length > 0)
{
return this.updateVideoTrack(stream, streamId, null, null).then(() =>
{
return this.updateAudioTrack(stream, streamId, null).then(() => {
return this.gotStream(stream);
});
});
}
else if (stream.getAudioTracks().length > 0)
{
return this.updateAudioTrack(stream, streamId, null).then(() => {
return this.gotStream(stream);
});
}
else
{
return this.gotStream(stream);
}
}
}).catch (error => {
if (error.name == "NotFoundError") {
this.getDevices()
}
else {
this.callbackError(error.name, error.message);
}
//throw error for promise
throw error;
});
} else {
return this.gotStream(stream);
}
}
/**
* Called to get user media (camera and/or mic)
*
* @param {*} mediaConstraints : media constaint
* @param {*} func : callback on success. The stream which is got, is passed as parameter to this function
* @param {*} catch_error : error is checked if catch_error is true
*/
navigatorUserMedia(mediaConstraints, func, catch_error) {
if (mediaConstraints.video == "dummy" || mediaConstraints.audio == "dummy") {
var stream = new MediaStream();
if (mediaConstraints.audio == "dummy")
{
stream.addTrack(this.getSilentAudioTrack());
}
if (mediaConstraints.video == "dummy")
{
stream.addTrack(this.getBlackVideoTrack());
}
return new Promise((resolve, reject) => {
resolve(stream);
})
}
else
{
return navigator.mediaDevices.getUserMedia(mediaConstraints).then((stream) => {
if (typeof func != "undefined" || func != null) {
func(stream);
}
return stream;
}).catch(error => {
if (catch_error == true) {
if (error.name == "NotFoundError") {
this.getDevices()
} else {
this.callbackError(error.name, error.message);
}
} else {
Logger.warn(error);
}
//throw error if there is a promise
throw error;
});
}
}
/**
* Called to get display media (screen share)
*
* @param {*} mediaConstraints : media constaint
* @param {*} func : callback on success. The stream which is got, is passed as parameter to this function
*/
navigatorDisplayMedia(mediaConstraints, func) {
return navigator.mediaDevices.getDisplayMedia(mediaConstraints)
.then((stream) => {
if (typeof func != "undefined") {
func(stream);
}
return stream;
})
.catch(error => {
if (error.name === "NotAllowedError") {
Logger.debug("Permission denied error");
this.callbackError("ScreenSharePermissionDenied");
// If error catched then redirect Default Stream Camera
if (this.localStream == null) {
var mediaConstraints = {
video: true,
audio: true
};
this.openStream(mediaConstraints);
} else {
this.switchVideoCameraCapture(streamId);
}
}
});
}
/**
* Called to get the media (User Media or Display Media)
* @param {*} mediaConstraints, media constraints
* @param {*} streamId, streamId to be used to replace track if there is an active peer connection
*/
getMedia(mediaConstraints, streamId)
{
var audioConstraint = false;
if (typeof mediaConstraints.audio != "undefined" && mediaConstraints.audio != false) {
audioConstraint = mediaConstraints.audio;
}
if (this.desktopCameraCanvasDrawerTimer != null) {
clearInterval(this.desktopCameraCanvasDrawerTimer);
this.desktopCameraCanvasDrawerTimer = null;
}
// Check Media Constraint video value screen or screen + camera
if (this.publishMode == "screen+camera" || this.publishMode == "screen") {
return this.navigatorDisplayMedia(mediaConstraints).then(stream => {
if (this.smallVideoTrack)
this.smallVideoTrack.stop();
return this.prepareStreamTracks(mediaConstraints, audioConstraint, stream, streamId);
});
}
else {
return this.navigatorUserMedia(mediaConstraints).then(stream => {
if (this.smallVideoTrack)
this.smallVideoTrack.stop();
return this.prepareStreamTracks(mediaConstraints, audioConstraint, stream, streamId);
}).catch(error => {
if (error.name == "NotFoundError") {
this.getDevices()
} else {
this.callbackError(error.name, error.message);
}
});
}
}
/**
* Open media stream, it may be screen, camera or audio
*/
openStream(mediaConstraints, streamId) {
this.mediaConstraints = mediaConstraints;
return this.getMedia(mediaConstraints, streamId).then(() => {
if (this.mediaConstraints.video != "dummy" && this.mediaConstraints.video != undefined) {
this.stopBlackVideoTrack();
this.clearBlackVideoTrackTimer();
}
if (this.mediaConstraints.audio != "dummy" && this.mediaConstraints.audio != undefined) {
this.stopSilentAudioTrack();
}
});
}
/**
* Closes stream, if you want to stop peer connection, call stop(streamId)
*/
closeStream() {
if (this.localStream) {
this.localStream.getVideoTracks().forEach(function (track) {
track.onended = null;
track.stop();
});
this.localStream.getAudioTracks().forEach(function (track) {
track.onended = null;
track.stop();
});
}
if (this.videoTrack) {
this.videoTrack.stop();
}
if (this.audioTrack) {
this.audioTrack.stop();
}
if (this.smallVideoTrack) {
this.smallVideoTrack.stop();
}
if (this.previousAudioTrack) {
this.previousAudioTrack.stop();
}
}
/**
* Checks browser supports screen share feature
* if exist it calls callback with "browser_screen_share_supported"
*/
checkBrowserScreenShareSupported() {
Eif ((typeof navigator.mediaDevices != "undefined" && navigator.mediaDevices.getDisplayMedia) || navigator.getDisplayMedia) {
this.callback("browser_screen_share_supported");
}
};
/**
* Changes the secondary stream gain in mixed audio mode
*
* @param {*} enable
*/
enableSecondStreamInMixedAudio(enable) {
if (this.secondaryAudioTrackGainNode != null) {
if (enable) {
this.secondaryAudioTrackGainNode.gain.value = 1;
} else {
this.secondaryAudioTrackGainNode.gain.value = 0;
}
}
}
/**
* Changes local stream when new stream is prepared
*
* @param {*} stream
*/
gotStream(stream) {
this.localStream = stream;
if (this.localVideo) {
this.localVideo.srcObject = stream;
}
this.getDevices();
this.trackDeviceChange();
return new Promise((resolve, reject) => {
resolve();
})
}
/**
* Changes local video and sets localStream as source
*
* @param {*} videoEl
*/
changeLocalVideo(videoEl) {
this.localVideo = videoEl
if (this.localStream) {
this.localVideo.srcObject = this.localStream
}
}
/**
* These methods are initialized when the user is muted himself in a publish scenario
* It will keep track if the user is trying to speak without sending any data to server
* Please don't forget to disable this function with disableAudioLevelWhenMuted if you use it.
*/
enableAudioLevelWhenMuted() {
return new Promise((resolve, reject) => {
navigator.mediaDevices.getUserMedia({video: false, audio: true})
.then((stream) => {
this.mutedAudioStream = stream;
this.mutedSoundMeter = new SoundMeter(this.audioContext, this.volumeMeterUrl);
this.mutedSoundMeter.connectToSource(this.mutedAudioStream, (value) => {
if (value > 0.1) {
this.callback("speaking_but_muted");
}
}, (e) => {
if (e) {
reject(e);
}
this.meterRefresh = setInterval(() => {
if (this.mutedSoundMeter .instant.toFixed(2) > 0.1) {
this.callback("speaking_but_muted");
}
}, 200);
resolve(null);
});
})
.catch(function (err) {
Logger.debug("Can't get the soundlevel on mute")
reject(err);
});
})
}
disableAudioLevelWhenMuted() {
if (this.meterRefresh != null) {
clearInterval(this.meterRefresh);
this.meterRefresh = null;
}
if (this.mutedSoundMeter != null) {
this.mutedSoundMeter.stop();
this.mutedSoundMeter = null;
}
if (this.mutedAudioStream != null) {
this.mutedAudioStream.getTracks().forEach(function (track) {
track.stop();
});
}
}
/**
* @Deprecated. It's not the job of SDK to make these things. It increases the complexity of the code.
* We provide samples for having these function
*
* This method mixed the first stream audio to the second stream audio and
* @param {*} stream : Primary stream that contain video and audio (system audio)
* @param {*} secondStream :stream has device audio
* @returns mixed stream.
*/
mixAudioStreams(stream, secondStream) {
//Logger.debug("audio stream track count: " + audioStream.getAudioTracks().length);
var composedStream = new MediaStream();
//added the video stream from the screen
stream.getVideoTracks().forEach(function (videoTrack) {
composedStream.addTrack(videoTrack);
});
var audioDestionation = this.audioContext.createMediaStreamDestination();
if (stream.getAudioTracks().length > 0) {
this.primaryAudioTrackGainNode = this.audioContext.createGain();
//Adjust the gain for screen sound
this.primaryAudioTrackGainNode.gain.value = 1;
var audioSource = this.audioContext.createMediaStreamSource(stream);
audioSource.connect(this.primaryAudioTrackGainNode).connect(audioDestionation);
} else {
Logger.debug("Origin stream does not have audio track")
}
if (secondStream.getAudioTracks().length > 0) {
this.secondaryAudioTrackGainNode = this.audioContext.createGain();
//Adjust the gain for second sound
this.secondaryAudioTrackGainNode.gain.value = 1;
var audioSource2 = this.audioContext.createMediaStreamSource(secondStream);
audioSource2.connect(this.secondaryAudioTrackGainNode).connect(audioDestionation);
} else {
Logger.debug("Second stream does not have audio track")
}
audioDestionation.stream.getAudioTracks().forEach(function (track) {
composedStream.addTrack(track);
Logger.debug("audio destination add track");
});
return composedStream;
}
/**
* This method creates a Gain Node stream to make the audio track adjustable
*
* @param {*} stream
* @returns
*/
setGainNodeStream(stream) {
if (this.mediaConstraints.audio != false && typeof this.mediaConstraints.audio != "undefined") {
// Get the videoTracks from the stream.
const videoTracks = stream.getVideoTracks();
// Get the audioTracks from the stream.
const audioTracks = stream.getAudioTracks();
/**
* Create a new audio context and build a stream source,
* stream destination and a gain node. Pass the stream into
* the mediaStreamSource so we can use it in the Web Audio API.
*/
this.audioContext = new AudioContext();
let mediaStreamSource = this.audioContext.createMediaStreamSource(stream);
let mediaStreamDestination = this.audioContext.createMediaStreamDestination();
this.primaryAudioTrackGainNode = this.audioContext.createGain();
/**
* Connect the stream to the gainNode so that all audio
* passes through the gain and can be controlled by it.
* Then pass the stream from the gain to the mediaStreamDestination
* which can pass it back to the RTC client.
*/
mediaStreamSource.connect(this.primaryAudioTrackGainNode);
this.primaryAudioTrackGainNode.connect(mediaStreamDestination);
if (this.currentVolume == null) {
this.primaryAudioTrackGainNode.gain.value = 1;
} else {
this.primaryAudioTrackGainNode.gain.value = this.currentVolume;
}
/**
* The mediaStreamDestination.stream outputs a MediaStream object
* containing a single AudioMediaStreamTrack. Add the video track
* to the new stream to rejoin the video with the controlled audio.
*/
const controlledStream = mediaStreamDestination.stream;
for (const videoTrack of videoTracks) {
controlledStream.addTrack(videoTrack);
}
for (const audioTrack of audioTracks) {
controlledStream.addTrack(audioTrack);
}
if (this.previousAudioTrack !== null) {
this.previousAudioTrack.stop();
}
this.previousAudioTrack = controlledStream.getAudioTracks()[1];
/**
* Use the stream that went through the gainNode. This
* is the same stream but with altered input volume levels.
*/
return controlledStream;
}
return stream;
}
/**
* Called by User
* to switch the Screen Share mode
*
* @param {*} streamId
*/
switchDesktopCapture(streamId) {
this.publishMode = "screen";
if (typeof this.mediaConstraints.video != "undefined" && this.mediaConstraints.video != false) {
this.mediaConstraints.video = true
}
//TODO: I don't think we need to get audio again. We just need to switch the video stream
return this.getMedia(this.mediaConstraints, streamId);
}
/**
* Called by User
* to switch the Screen Share with Camera mode
*
* @param {*} streamId
*/
switchDesktopCaptureWithCamera(streamId) {
if (typeof this.mediaConstraints.video != "undefined" && this.mediaConstraints.video != false) {
this.mediaConstraints.video = true
}
this.publishMode = "screen+camera";
//TODO: I don't think we need to get audio again. We just need to switch the video stream
return this.getMedia(this.mediaConstraints, streamId);
}
/**
* This method updates the local stream. It removes existant audio track from the local stream
* and add the audio track in `stream` parameter to the local stream
*/
updateLocalAudioStream(stream, onEndedCallback) {
var newAudioTrack = stream.getAudioTracks()[0];
if (this.localStream != null && this.localStream.getAudioTracks()[0] != null)
{
var audioTrack = this.localStream.getAudioTracks()[0];
if (audioTrack != newAudioTrack)
{
this.localStream.removeTrack(audioTrack);
audioTrack.stop();
this.localStream.addTrack(newAudioTrack);
}
} else if (this.localStream != null) {
this.localStream.addTrack(newAudioTrack);
} else {
this.localStream = stream;
}
if (this.localVideo != null) { //it can be null
this.localVideo.srcObject = this.localStream;
}
if (onEndedCallback != null) {
stream.getAudioTracks()[0].onended = function (event) {
onEndedCallback(event);
}
}
if (this.isMuted) {
this.muteLocalMic();
} else {
this.unmuteLocalMic();
}
if (this.localStreamSoundMeter != null) {
this.enableAudioLevelForLocalStream(this.levelCallback)
}
}
/**
* This method updates the local stream. It removes existant video track from the local stream
* and add the video track in `stream` parameter to the local stream
*/
updateLocalVideoStream(stream, onEndedCallback, stopDesktop) {
if (stopDesktop && this.desktopStream != null) {
this.desktopStream.getVideoTracks()[0].stop();
}
var newVideoTrack = stream.getVideoTracks()[0];
if (this.localStream != null && this.localStream.getVideoTracks()[0] != null )
{
var videoTrack = this.localStream.getVideoTracks()[0];
if (videoTrack != newVideoTrack)
{
this.localStream.removeTrack(videoTrack);
videoTrack.stop();
this.localStream.addTrack(newVideoTrack);
}
} else if (this.localStream != null) {
this.localStream.addTrack(newVideoTrack);
} else {
this.localStream = stream;
}
if (this.localVideo) {
this.localVideo.srcObject = this.localStream;
}
if (onEndedCallback != null) {
stream.getVideoTracks()[0].onended = function (event) {
onEndedCallback(event);
}
}
}
/**
* Called by User
* to change video source
*
* @param {*} streamId
* @param {*} deviceId
*/
switchAudioInputSource(streamId, deviceId) {
//stop the track because in some android devices need to close the current camera stream
var audioTrack = this.localStream.getAudioTracks()[0];
if (audioTrack && isAndroid()) {
audioTrack.stop();
}
if(typeof audioTrack == "undefined") {
Logger.warn("There is no audio track in local stream");
}
if (typeof deviceId != "undefined") {
//Update the media constraints
if (this.mediaConstraints.audio !== true)
this.mediaConstraints.audio.deviceId = deviceId;
else
this.mediaConstraints.audio = {"deviceId": deviceId};
//to change only audio track set video false otherwise issue #3826 occurs on Android
let tempMediaConstraints = {"video": false, "audio": {"deviceId": deviceId}};
return this.setAudioInputSource(streamId, tempMediaConstraints, null, deviceId);
} else {
return new Promise((resolve, reject) => {
reject("There is no device id for audio input source");
});
}
}
/**
* This method sets Audio Input Source and called when you change audio device
* It calls updateAudioTrack function to update local audio stream.
*/
setAudioInputSource(streamId, mediaConstraints, onEndedCallback) {
return this.navigatorUserMedia(mediaConstraints, stream => {
stream = this.setGainNodeStream(stream);
return this.updateAudioTrack(stream, streamId, mediaConstraints, onEndedCallback);
}, true);
}
checkAndStopLocalVideoTrackOnAndroid() {
//stop the track because in some android devices need to close the current camera stream
if (this.localStream && this.localStream.getVideoTracks().length > 0 && isAndroid()) {
let videoTrack = this.localStream.getVideoTracks()[0];
videoTrack.stop();
}
if(this.localStream === null || this.localStream.getVideoTracks().length === 0) {
Logger.warn("There is no video track in local stream");
}
}
/**
* Called by User
* to change video camera capture
*
* @param {*} streamId Id of the stream to be changed.
* @param {*} deviceId Id of the device which will use as a media device
* @param {*} onEndedCallback callback for when the switching video state is completed, can be used to understand if it is loading or not
*
* This method is used to switch to video capture.
*/
switchVideoCameraCapture(streamId, deviceId, onEndedCallback) {
this.checkAndStopLocalVideoTrackOnAndroid();
this.publishMode = "camera";
return navigator.mediaDevices.enumerateDevices().then(devices => {
for (let i = 0; i < devices.length; i++) {
if (devices[i].kind == "videoinput") {
//Adjust video source only if there is a matching device id with the given one.
//It creates problems if we don't check that since video can be just true to select default cam and it is like that in many cases.
if (devices[i].deviceId == deviceId) {
if (this.mediaConstraints.video !== true)
this.mediaConstraints.video.deviceId = {exact: deviceId};
else
this.mediaConstraints.video = {deviceId: {exact: deviceId}};
break;
}
}
}
;
//If no matching device found don't adjust the media constraints let it be true instead of a device ID
Logger.debug("Given deviceId = " + deviceId + " - Media constraints video property = " + this.mediaConstraints.video);
return this.setVideoCameraSource(streamId, this.mediaConstraints, onEndedCallback, true, deviceId);
})
}
/**
* This method sets Video Input Source and called when you change video device
* It calls updateVideoTrack function to update local video stream.
*/
setVideoCameraSource(streamId, mediaConstraints, onEndedCallback, stopDesktop) {
return this.navigatorUserMedia(mediaConstraints, stream => {
if (stopDesktop && this.secondaryAudioTrackGainNode && stream.getAudioTracks().length > 0) {
//This audio track update is necessary for such a case:
//If you enable screen share with browser audio and then
//return back to the camera, the audio should be only from mic.
//If, we don't update audio with the following lines,
//the mixed (mic+browser) audio would be streamed in the camera mode.
this.secondaryAudioTrackGainNode = null;
stream = this.setGainNodeStream(stream);
this.updateAudioTrack(stream, streamId, mediaConstraints, onEndedCallback)
}
if (this.cameraEnabled) {
return this.updateVideoTrack(stream, streamId, onEndedCallback, stopDesktop);
} else {
return this.turnOffLocalCamera();
}
}, true);
}
/**
* Called by User
* to switch between front and back camera on mobile devices
*
* @param {*} streamId Id of the stream to be changed.
* @param {*} facingMode it can be "user" or "environment"
*
* This method is used to switch front and back camera.
*/
switchVideoCameraFacingMode(streamId, facingMode) {
this.checkAndStopLocalVideoTrackOnAndroid();
// When device id set, facing mode is not working
// so, remove device id
if (this.mediaConstraints.video !== undefined && this.mediaConstraints.video.deviceId !== undefined) {
delete this.mediaConstraints.video.deviceId;
}
var videoConstraint = {
'facingMode': facingMode
};
this.mediaConstraints.video = Object.assign({},
this.mediaConstraints.video,
videoConstraint);
this.publishMode = "camera";
Logger.debug("Media constraints video property = " + this.mediaConstraints.video);
return this.setVideoCameraSource(streamId, {video: this.mediaConstraints.video}, null, true);
}
/**
* Updates the audio track in the audio sender
* getSender method is set on MediaManagercreation by WebRTCAdaptor
*
* @param {*} stream
* @param {*} streamId
* @param {*} onEndedCallback
*/
updateAudioTrack(stream, streamId, onEndedCallback) {
var audioTrackSender = this.getSender(streamId, "audio");
if (audioTrackSender) {
return audioTrackSender.replaceTrack(stream.getAudioTracks()[0]).then(result => {
this.updateLocalAudioStream(stream, onEndedCallback);
}).catch(function (error) {
Logger.debug(error.name);
throw error;
});
} else {
this.updateLocalAudioStream(stream, onEndedCallback);
return new Promise((resolve, reject) => {
resolve();
});
}
}
/**
* Updates the video track in the video sender
* getSender method is set on MediaManagercreation by WebRTCAdaptor
*
* @param {*} stream
* @param {*} streamId
* @param {*} onEndedCallback
*/
updateVideoTrack(stream, streamId, onEndedCallback, stopDesktop) {
var videoTrackSender = this.getSender(streamId, "video");
if (videoTrackSender)
{
return videoTrackSender.replaceTrack(stream.getVideoTracks()[0]).then(result => {
this.updateLocalVideoStream(stream, onEndedCallback, stopDesktop);
}).catch(error => {
Logger.debug(error.name);
});
} else {
this.updateLocalVideoStream(stream, onEndedCallback, stopDesktop);
return new Promise((resolve, reject) => {
resolve();
});
}
}
/**
* If you mute turn off the camera still some data should be sent
* Tihs method create a black frame to reduce data transfer
*/
getBlackVideoTrack() {
this.dummyCanvas.getContext('2d').fillRect(0, 0, 320, 240);
//REFACTOR: it's not good to set to a replacement stream
this.replacementStream = this.dummyCanvas.captureStream();
//We need to send black frames within a time interval, because when the user turn off the camera,
//player can't connect to the sender since there is no data flowing. Sending a black frame in each 3 seconds resolves it.
if (this.blackFrameTimer == null) {
this.blackFrameTimer = setInterval(() => {
this.getBlackVideoTrack();
}, 3000);
}
this.blackVideoTrack = this.replacementStream.getVideoTracks()[0];
return this.blackVideoTrack;
}
/**
* Silent audio track
*/
getSilentAudioTrack()
{
this.stopSilentAudioTrack();
this.oscillator = this.audioContext.createOscillator();
let dst = this.oscillator.connect(this.audioContext.createMediaStreamDestination());
this.oscillator.start();
this.silentAudioTrack = dst.stream.getAudioTracks()[0];
return this.silentAudioTrack;
}
stopSilentAudioTrack() {
if (this.oscillator != null) {
this.oscillator.stop();
this.oscillator.disconnect();
this.oscillator = null;
}
if (this.silentAudioTrack != null) {
this.silentAudioTrack.stop();
this.silentAudioTrack = null;
}
}
/**
* Called by User
* turns of the camera stream and starts streaming black dummy frame
*/
turnOffLocalCamera(streamId) {
//Initialize the first dummy frame for switching.
this.getBlackVideoTrack();
if (this.localStream != null)
{
let choosenId;
if (streamId != null || typeof streamId != "undefined") {
choosenId = streamId;
} else {
choosenId = this.publishStreamId;
}
this.cameraEnabled = false;
return this.updateVideoTrack(this.replacementStream, choosenId, null, true);
}
else {
return new Promise((resolve, reject) => {
this.callbackError("NoActiveConnection");
reject("NoActiveStream");
});
}
}
clearBlackVideoTrackTimer()
{
if (this.blackFrameTimer != null) {
clearInterval(this.blackFrameTimer);
this.blackFrameTimer = null;
}
}
stopBlackVideoTrack()
{
if (this.blackVideoTrack != null) {
this.blackVideoTrack.stop();
this.blackVideoTrack = null;
}
}
/**
* Called by User
* turns of the camera stream and starts streaming camera again instead of black dummy frame
*/
turnOnLocalCamera(streamId) {
this.clearBlackVideoTrackTimer();
this.stopBlackVideoTrack();
if (this.localStream == null) {
return this.navigatorUserMedia(this.mediaConstraints, stream => {
this.gotStream(stream);
}, false);
}
//This method will get the camera track and replace it with dummy track
else {
return this.navigatorUserMedia(this.mediaConstraints, stream => {
let choosenId;
if (streamId != null || typeof streamId != "undefined") {
choosenId = streamId;
} else {
choosenId = this.publishStreamId;
}
this.cameraEnabled = true;
this.updateVideoTrack(stream, choosenId, null, true);
}, false);
}
}
/**
* Called by User
* to mute local audio streaming
*/
muteLocalMic() {
this.isMuted = true;
if (this.localStream != null) {
this.localStream.getAudioTracks().forEach(track => track.enabled = false);
} else {
this.callbackError("NoActiveConnection");
}
}
/**
* Called by User
* to unmute local audio streaming
*
* if there is audio it calls callbackError with "AudioAlreadyActive" parameter
*/
unmuteLocalMic() {
this.isMuted = false;
if (this.localStream != null) {
this.localStream.getAudioTracks().forEach(track => track.enabled = true);
} else {
this.callbackError("NoActiveConnection");
}
}
/**
* If we have multiple video tracks in coming versions, this method may cause some issues
*/
getVideoSender(streamId) {
var videoSender = null;
if (typeof adapter !== "undefined" && adapter !== null && ((adapter.browserDetails.browser === 'chrome' ||
(adapter.browserDetails.browser === 'firefox' ||
adapter.browserDetails.browser === 'safari' &&
adapter.browserDetails.version >= 64)) &&
'RTCRtpSender' in window &&
'setParameters' in window.RTCRtpSender.prototype)) {
videoSender = this.getSender(streamId, "video");
}
return videoSender;
}
/**
* Called by User
* to set maximum video bandwidth is in kbps
*/
changeBandwidth(bandwidth, streamId) {
var errorDefinition = "";
var videoSender = this.getVideoSender(streamId);
if (videoSender != null) {
const parameters = videoSender.getParameters();
if (!parameters.encodings) {
parameters.encodings = [{}];
}
if (bandwidth === 'unlimited') {
delete parameters.encodings[0].maxBitrate;
} else {
parameters.encodings[0].maxBitrate = bandwidth * 1000;
}
return videoSender.setParameters(parameters)
} else {
errorDefinition = "Video sender not found to change bandwidth. Streaming may not be active";
}
return Promise.reject(errorDefinition);
};
/**
* Called by user
* sets the volume level
*
* @param {*} volumeLevel : Any number between 0 and 1.
*/
setVolumeLevel(volumeLevel) {
this.currentVolume = volumeLevel;
if (this.primaryAudioTrackGainNode != null) {
this.primaryAudioTrackGainNode.gain.value = volumeLevel;
}
if (this.secondaryAudioTrackGainNode != null) {
this.secondaryAudioTrackGainNode.gain.value = volumeLevel;
}
}
/**
* Called by user
* To create a sound meter for the local stream
*
* @param {Function} levelCallback : callback to provide the audio level to user
* @param {*} period : measurement period
*/
enableAudioLevelForLocalStream(levelCallback) {
this.levelCallback = levelCallback;
this.disableAudioLevelForLocalStream();
this.localStreamSoundMeter = new SoundMeter(this.audioContext, this.volumeMeterUrl);
if (this.audioContext.state !== 'running') {
return this.audioContext.resume().then(() => {
return this.localStreamSoundMeter.connectToSource(this.localStream, levelCallback);
})
}
else {
return this.localStreamSoundMeter.connectToSource(this.localStream, levelCallback);
}
}
disableAudioLevelForLocalStream() {
if (this.localStreamSoundMeter != null) {
this.localStreamSoundMeter.stop();
this.localStreamSoundMeter = null;
}
}
/**
* Called by user
* To change audio/video constraints on the fly
*
*/
applyConstraints(newConstraints) {
var constraints = {};
if (newConstraints.audio === undefined && newConstraints.video === undefined) {
//if audio or video field is not defined, assume that it's a video constraint
constraints.video = newConstraints;
this.mediaConstraints.video = Object.assign({},
this.mediaConstraints.video,
constraints.video);
} else if (newConstraints.video !== undefined) {
constraints.video = newConstraints.video;
this.mediaConstraints.video = Object.assign({},
this.mediaConstraints.video,
constraints.video);
}
if (newConstraints.audio !== undefined) {
constraints.audio = newConstraints.audio;
this.mediaConstraints.audio = Object.assign({},
this.mediaConstraints.audio,
constraints.audio);
}
var promise = null;
if (constraints.video !== undefined)
{
if (this.localStream && this.localStream.getVideoTracks().length > 0) {
var videoTrack = this.localStream.getVideoTracks()[0];
promise = videoTrack.applyConstraints(this.mediaConstraints.video);
} else {
promise = new Promise((resolve, reject) => {
reject("There is no video track to apply constraints");
});
}
}
if (constraints.audio !== undefined) {
//just give the audio constraints not to get video stream
//we dont call applyContrains for audio because it does not work. I think this is due to gainStream things. This is why we call getUserMedia again
//use the publishStreamId because we don't have streamId in the parameter anymore
promise = this.setAudioInputSource(this.publishStreamId, {audio: this.mediaConstraints.audio}, null);
}
if (this.localStreamSoundMeter != null) {
this.enableAudioLevelForLocalStream(this.levelCallback)
}
return promise;
}
}
|