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webrtc_session.jsx
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webrtc_session.jsx
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// Copyright (c) 2016 Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
import adapter from 'webrtc-adapter';
import WebrtcClient from './webrtc_client.jsx';
const transationLength = 12;
export default class WebrtcSession {
static randomString(len) {
const charSet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
let randomString = '';
for (let i = 0; i < len; i++) {
const randomPoz = Math.floor(Math.random() * charSet.length);
randomString += charSet.substring(randomPoz, randomPoz + 1);
}
return randomString;
}
static getLocalMedia(constraints, element, callback) {
const media = constraints || {audio: true, video: true};
navigator.mediaDevices.getUserMedia(media).
then((stream) => {
if (element) {
element.srcObject = stream;
}
if (callback && typeof callback === 'function') {
callback(null, stream);
}
}).
catch((error) => {
callback(error);
});
}
static stopMediaStream(stream) {
const tracks = stream.getTracks();
tracks.forEach((track) => {
track.stop();
});
}
constructor(opts) {
// super();
const options = opts || {};
this.getServer = this.getServer.bind(this);
this.isConnected = this.isConnected.bind(this);
this.getSessionId = this.getSessionId.bind(this);
this.handleEvent = this.handleEvent.bind(this);
this.keepAlive = this.keepAlive.bind(this);
this.createSession = this.createSession.bind(this);
this.attach = this.attach.bind(this);
this.sendMessage = this.sendMessage.bind(this);
this.sendTrickleCandidate = this.sendTrickleCandidate.bind(this);
this.sendData = this.sendData.bind(this);
this.sendDtmf = this.sendDtmf.bind(this);
this.destroy = this.destroy.bind(this);
this.destroyHandle = this.destroyHandle.bind(this);
this.streamsDone = this.streamsDone.bind(this);
this.prepareWebrtc = this.prepareWebrtc.bind(this);
this.prepareWebrtcPeer = this.prepareWebrtcPeer.bind(this);
this.createOffer = this.createOffer.bind(this);
this.createAnswer = this.createAnswer.bind(this);
this.sendSDP = this.sendSDP.bind(this);
this.getVolume = this.getVolume.bind(this);
this.isMuted = this.isMuted.bind(this);
this.mute = this.mute.bind(this);
this.getBitrate = this.getBitrate.bind(this);
this.webrtcError = this.webrtcError.bind(this);
this.cleanupWebrtc = this.cleanupWebrtc.bind(this);
this.isAudioSendEnabled = this.isAudioSendEnabled.bind(this);
this.isAudioRecvEnabled = this.isAudioRecvEnabled.bind(this);
this.isVideoSendEnabled = this.isVideoSendEnabled.bind(this);
this.isVideoRecvEnabled = this.isVideoRecvEnabled.bind(this);
this.isDataEnabled = this.isDataEnabled.bind(this);
this.isTrickleEnabled = this.isTrickleEnabled.bind(this);
this.unbindWebSocket = this.unbindWebSocket.bind(this);
this.websockets = false;
this.ws = null;
this.wsHandlers = {};
this.wsKeepaliveTimeoutId = null;
this.servers = null;
this.server = null;
this.serversIndex = 0;
this.connected = false;
this.sessionId = null;
this.pluginHandles = {};
this.retries = 0;
this.transactions = {};
this.client = new WebrtcClient();
this.client.init({debug: options.debug});
this.gatewayCallbacks = options || {};
this.gatewayCallbacks.success = (typeof options.success == 'function') ? options.success : this.client.noop;
this.gatewayCallbacks.error = (typeof options.error == 'function') ? options.error : this.client.noop;
this.gatewayCallbacks.destroyed = (typeof options.destroyed == 'function') ? options.destroyed : this.client.noop;
if (!this.client.initDone) {
this.gatewayCallbacks.error('webrtc_client.not_initialize', 'Library not initialized');
return {};
}
if (!this.client.isWebrtcSupported()) {
this.gatewayCallbacks.error('webrtc_client.browser.not_supported', 'WebRTC not supported by this browser');
return {};
}
this.client.log('Library initialized: ' + this.client.initDone);
if (!options.server) {
this.gatewayCallbacks.error('webrtc_client.invalid_gateway', 'Invalid gateway url');
return {};
}
if (Array.isArray(options.server)) {
this.client.log('Multiple servers provided (' + options.server.length + '), will use the first that works');
for (let i = 0; i < options.server; i++) {
const server = options.server[i];
if (server.indexOf('ws') !== 0) {
this.gatewayCallbacks.error('webrtc_client.must_be_websocket', 'every server provided must be a websocket');
return {};
}
}
this.servers = options.server;
this.client.debug(this.servers);
} else if (options.server.indexOf('ws') === 0) {
this.websockets = true;
this.servers = [options.server];
this.client.log('Using WebSockets to contact Janus: ' + options.server);
} else {
this.gatewayCallbacks.error('webrtc_client.invalid_websocket', 'This library must connect to a websocket');
return {};
}
this.iceServers = options.iceServers;
if (!this.iceServers || this.iceServers.length === 0) {
this.iceServers = [{url: 'stun:stun.l.google.com:19302'}];
}
// Optional max events
this.maxev = null;
if (options.max_poll_events) {
this.maxev = options.max_poll_events;
}
if (this.maxev < 1) {
this.maxev = 1;
}
// Token to use (only if the token based authentication mechanism is enabled)
this.token = null;
if (options.token) {
this.token = options.token;
}
// API secret to use (only if the shared API secret is enabled)
this.apisecret = null;
if (options.apisecret) {
this.apisecret = options.apisecret;
}
// Whether we should destroy this session when onbeforeunload is called
this.destroyOnUnload = options.destroyOnUnload !== false;
this.createSession();
return this;
}
getServer() {
return this.server;
}
isConnected() {
return this.connected;
}
getSessionId() {
return this.sessionId;
}
handleEvent(json) {
this.retries = 0;
this.client.debug('Got event on session ' + this.sessionId);
this.client.debug(json);
const transaction = json.transaction;
const sender = json.sender;
const plugindata = json.plugindata;
const jsep = json.jsep;
switch (json.janus) {
case 'keepalive':
// Nothing happened
break;
case 'ack':
case 'success':
// Success or just an ack, we can probably ignore
if (transaction) {
const reportSuccess = this.transactions[transaction];
if (reportSuccess) {
reportSuccess(json);
}
Reflect.deleteProperty(this.transactions, transaction);
}
break;
case 'webrtcup':
// The PeerConnection with the gateway is up! Notify this
if (sender) {
const pluginHandle = this.pluginHandles[sender];
if (pluginHandle) {
pluginHandle.webrtcState(true);
} else {
this.client.warn('This handle is not attached to this session');
}
} else {
this.client.warn('Missing sender...');
}
break;
case 'hangup':
// A plugin asked the core to hangup a PeerConnection on one of our handles
if (sender) {
const pluginHandle = this.pluginHandles[sender];
if (pluginHandle) {
pluginHandle.webrtcState(false);
pluginHandle.hangup();
} else {
this.client.warn('This handle is not attached to this session');
}
} else {
this.client.warn('Missing sender...');
}
break;
case 'detached':
// A plugin asked the core to detach one of our handles
if (sender) {
const pluginHandle = this.pluginHandles[sender];
if (pluginHandle) {
pluginHandle.ondetached();
pluginHandle.detach();
} else {
this.client.warn('This handle is not attached to this session');
}
} else {
this.client.warn('Missing sender...');
}
break;
case 'media':
// Media started/stopped flowing
if (sender) {
const pluginHandle = this.pluginHandles[sender];
if (pluginHandle) {
pluginHandle.mediaState(json.type, json.receiving);
} else {
this.client.warn('This handle is not attached to this session');
}
} else {
this.client.warn('Missing sender...');
}
break;
case 'error':
// Oops, something wrong happened
this.client.error('Ooops: ' + json.error.code + ' ' + json.error.reason);
if (transaction) {
const reportSuccess = this.transactions[transaction];
if (reportSuccess) {
reportSuccess(json);
}
Reflect.deleteProperty(this.transactions, transaction);
}
break;
case 'event':
if (sender) {
if (plugindata) {
this.client.debug(` -- Event is coming from ${sender} ( ${plugindata.plugin} )`);
const data = plugindata.data;
this.client.debug(data);
const pluginHandle = this.pluginHandles[sender];
if (pluginHandle) {
pluginHandle.mediaState(json.type, json.receiving);
if (jsep) {
this.client.debug('Handling SDP as well...');
this.client.debug(jsep);
}
const callback = pluginHandle.onmessage;
if (callback) {
this.client.debug('Notifying application...');
// Send to callback specified when attaching plugin handle
callback(data, jsep);
} else {
// Send to generic callback (?)
this.client.debug('No provided notification callback');
}
} else {
this.client.warn('This handle is not attached to this session');
}
} else {
this.client.warn('Missing plugindata...');
}
} else {
this.client.warn('Missing sender...');
}
break;
default:
this.client.warn(`Unknown message "${json.janus}"`);
break;
}
}
keepAlive() {
if (this.server === null || !this.websockets || !this.connected) {
return;
}
this.wsKeepaliveTimeoutId = setTimeout(this.keepAlive, 30000);
const request = {
janus: 'keepalive',
session_id: this.sessionId,
transaction: WebrtcSession.randomString(transationLength)
};
if (this.token) {
request.token = this.token;
}
if (this.apisecret) {
request.apisecret = this.apisecret;
}
this.ws.send(JSON.stringify(request));
}
createSession() {
const transaction = WebrtcSession.randomString(transationLength);
const request = {
janus: 'create',
transaction
};
if (this.token) {
request.token = this.token;
}
if (this.apisecret) {
request.apisecret = this.apisecret;
}
if (this.server === null && Array.isArray(this.servers)) {
// We still need to find a working server from the list we were given
this.server = this.servers[this.serversIndex];
if (this.server.indexOf('ws') === 0) {
this.websockets = true;
this.client.log('Server #' + (this.serversIndex + 1) + ': trying WebSockets to contact Janus (' + this.server + ')');
}
}
if (this.websockets) {
this.ws = new WebSocket(this.server, 'janus-protocol');
this.wsHandlers = {
error: () => {
this.client.error('Error connecting to the Janus WebSockets server... ' + this.server);
if (Array.isArray(this.servers)) {
this.serversIndex++;
if (this.serversIndex === this.servers.length) {
// We tried all the servers the user gave us and they all failed
this.gatewayCallbacks.error('webrtc_client.cannot_connect_servers', 'Error connecting to any of the provided Janus servers: Is the gateway down?');
return;
}
// Let's try the next server
this.server = null;
setTimeout(() => {
this.createSession();
}, 200);
return;
}
this.gatewayCallbacks.error('webrtc_client.cannot_connect_server', 'Error connecting to the Janus WebSockets server: Is the gateway down?');
},
open: () => {
// We need to be notified about the success
this.transactions[transaction] = (json) => {
this.client.debug(json);
if (json.janus !== 'success') {
this.client.error('Ooops: ' + json.error.code + ' ' + json.error.reason); // FIXME
this.gatewayCallbacks.error(json.error.reason);
return;
}
this.wsKeepaliveTimeoutId = setTimeout(this.keepAlive, 30000);
this.connected = true;
this.sessionId = json.data.id;
this.client.log('Created session: ' + this.sessionId);
this.client.sessions[this.sessionId] = this;
this.gatewayCallbacks.success();
};
this.ws.send(JSON.stringify(request));
},
message: (event) => {
this.handleEvent(JSON.parse(event.data));
},
close: () => {
if (!this.connected) {
return;
}
this.connected = false;
// FIXME What if this is called when the page is closed?
this.gatewayCallbacks.error('Lost connection to the gateway (is it down?)');
}
};
for (var eventName in this.wsHandlers) {
if (this.wsHandlers.hasOwnProperty(eventName)) {
this.ws.addEventListener(eventName, this.wsHandlers[eventName]);
}
}
}
}
attach(cbs) {
const callbacks = cbs || {};
callbacks.success = (typeof cbs.success == 'function') ? cbs.success : this.client.noop;
callbacks.error = (typeof cbs.error == 'function') ? cbs.error : this.client.noop;
callbacks.consentDialog = (typeof cbs.consentDialog == 'function') ? cbs.consentDialog : this.client.noop;
callbacks.mediaState = (typeof cbs.mediaState == 'function') ? cbs.mediaState : this.client.noop;
callbacks.webrtcState = (typeof cbs.webrtcState == 'function') ? cbs.webrtcState : this.client.noop;
callbacks.onmessage = (typeof cbs.onmessage == 'function') ? cbs.onmessage : this.client.noop;
callbacks.onlocalstream = (typeof cbs.onlocalstream == 'function') ? cbs.onlocalstream : this.client.noop;
callbacks.onremotestream = (typeof cbs.onremotestream == 'function') ? cbs.onremotestream : this.client.noop;
callbacks.ondata = (typeof cbs.ondata == 'function') ? cbs.ondata : this.client.noop;
callbacks.ondataopen = (typeof cbs.ondataopen == 'function') ? cbs.ondataopen : this.client.noop;
callbacks.oncleanup = (typeof cbs.oncleanup == 'function') ? cbs.oncleanup : this.client.noop;
callbacks.ondetached = (typeof cbs.ondetached == 'function') ? cbs.ondetached : this.client.noop;
if (!this.connected) {
this.client.warn('Is the gateway down? (connected=false)');
callbacks.error('Is the gateway down? (connected=false)');
return;
}
const plugin = callbacks.plugin;
if (!plugin) {
this.client.error('Invalid plugin');
callbacks.error('Invalid plugin');
return;
}
const transaction = WebrtcSession.randomString(transationLength);
const request = {
janus: 'attach',
plugin,
transaction
};
if (this.token) {
request.token = this.token;
}
if (this.apisecret) {
request.apisecret = this.apisecret;
}
if (this.websockets) {
this.transactions[transaction] = (json) => {
this.client.debug(json);
if (json.janus !== 'success') {
const error = `Ooops: ${json.error.code} ${json.error.reason}`;
this.client.error(error);
callbacks.error(error);
return;
}
const handleId = json.data.id;
this.client.log('Created handle: ' + handleId);
const pluginHandle = {
session: this,
plugin,
id: handleId,
webrtcStuff: {
started: false,
myStream: null,
streamExternal: false,
remoteStream: null,
mySdp: null,
pc: null,
dataChannel: null,
dtmfSender: null,
trickle: true,
iceDone: false,
sdpSent: false,
volume: {
value: null,
timer: null
},
bitrate: {
value: null,
bsnow: null,
bsbefore: null,
tsnow: null,
tsbefore: null,
timer: null
}
},
getId: () => {
return handleId;
},
getPlugin: () => {
return plugin;
},
getVolume: () => {
return this.getVolume(handleId);
},
isAudioMuted: () => {
return this.isMuted(handleId, false);
},
muteAudio: () => {
return this.mute(handleId, false, true);
},
unmuteAudio: () => {
return this.mute(handleId, false, false);
},
isVideoMuted: () => {
return this.isMuted(handleId, true);
},
muteVideo: () => {
return this.mute(handleId, true, true);
},
unmuteVideo: () => {
return this.mute(handleId, true, false);
},
getBitrate: () => {
return this.getBitrate(handleId);
},
send: (cb) => {
this.sendMessage(handleId, cb);
},
data: (cb) => {
this.sendData(handleId, cb);
},
dtmf: (cb) => {
this.sendDtmf(handleId, cb);
},
consentDialog: callbacks.consentDialog,
mediaState: callbacks.mediaState,
webrtcState: callbacks.webrtcState,
onmessage: callbacks.onmessage,
createOffer: (cb) => {
this.prepareWebrtc(handleId, cb);
},
createAnswer: (cb) => {
this.prepareWebrtc(handleId, cb);
},
handleRemoteJsep: (cb) => {
this.prepareWebrtcPeer(handleId, cb);
},
onlocalstream: callbacks.onlocalstream,
onremotestream: callbacks.onremotestream,
ondata: callbacks.ondata,
ondataopen: callbacks.ondataopen,
oncleanup: callbacks.oncleanup,
ondetached: callbacks.ondetached,
hangup: (sendRequest) => {
this.cleanupWebrtc(handleId, sendRequest === true);
},
detach: (cb) => {
this.destroyHandle(handleId, cb);
}
};
this.pluginHandles[handleId] = pluginHandle;
callbacks.success(pluginHandle);
};
request.session_id = this.sessionId;
this.ws.send(JSON.stringify(request));
}
}
sendMessage(handleId, cbs) {
const callbacks = cbs || {};
callbacks.success = (typeof cbs.success == 'function') ? cbs.success : this.client.noop;
callbacks.error = (typeof cbs.error == 'function') ? cbs.error : this.client.noop;
if (!this.connected) {
const error = 'Is the gateway down? (connected=false)';
this.client.warn(error);
callbacks.error(error);
return;
}
const message = callbacks.message;
const jsep = callbacks.jsep;
const transaction = WebrtcSession.randomString(transationLength);
const request = {
janus: 'message',
body: message,
transaction
};
if (this.token) {
request.token = this.token;
}
if (this.apisecret) {
request.apisecret = this.apisecret;
}
if (jsep) {
request.jsep = jsep;
}
this.client.debug('Sending message to plugin (handle=' + handleId + '):');
this.client.debug(request);
if (this.websockets) {
request.session_id = this.sessionId;
request.handle_id = handleId;
this.transactions[transaction] = (json) => {
this.client.debug('Message sent!');
this.client.debug(json);
if (json.janus === 'success') {
// We got a success, must have been a synchronous transaction
const plugindata = json.plugindata;
if (!plugindata) {
this.client.warn('Request succeeded, but missing plugindata...');
callbacks.success();
return;
}
this.client.log('Synchronous transaction successful (' + plugindata.plugin + ')');
const data = plugindata.data;
this.client.debug(data);
callbacks.success(data);
return;
} else if (json.janus !== 'ack') {
// Not a success and not an ack, must be an error
if (json.error) {
this.client.error('Ooops: ' + json.error.code + ' ' + json.error.reason);
callbacks.error(json.error.code + ' ' + json.error.reason);
} else {
this.client.error('Unknown error');
callbacks.error('Unknown error');
}
return;
}
// If we got here, the plugin decided to handle the request asynchronously
callbacks.success();
};
this.ws.send(JSON.stringify(request));
}
}
sendTrickleCandidate(handleId, candidate) {
if (!this.connected) {
this.client.warn('Is the gateway down? (connected=false)');
return;
}
var request = {
janus: 'trickle',
candidate,
transaction: WebrtcSession.randomString(transationLength)
};
if (this.token) {
request.token = this.token;
}
if (this.apisecret) {
request.apisecret = this.apisecret;
}
this.client.debug('Sending trickle candidate (handle=' + handleId + '):');
this.client.debug(request);
if (this.websockets) {
request.session_id = this.sessionId;
request.handle_id = handleId;
this.ws.send(JSON.stringify(request));
}
}
sendData(handleId, cbs) {
const callbacks = cbs || {};
callbacks.success = (typeof cbs.success == 'function') ? cbs.success : this.client.noop;
callbacks.error = (typeof cbs.error == 'function') ? cbs.error : this.client.noop;
const pluginHandle = this.pluginHandles[handleId];
if (!pluginHandle || !pluginHandle.webrtcStuff) {
this.client.warn('Invalid handle');
callbacks.error('Invalid handle');
return;
}
const config = pluginHandle.webrtcStuff;
const text = callbacks.text;
if (!text) {
this.client.warn('Invalid text');
callbacks.error('Invalid text');
return;
}
this.client.log('Sending string on data channel: ' + text);
config.dataChannel.send(text);
callbacks.success();
}
sendDtmf(handleId, cbs) {
const callbacks = cbs || {};
callbacks.success = (typeof cbs.success == 'function') ? cbs.success : this.client.noop;
callbacks.error = (typeof cbs.error == 'function') ? cbs.error : this.client.noop;
const pluginHandle = this.pluginHandles[handleId];
if (!pluginHandle || !pluginHandle.webrtcStuff) {
this.client.warn('Invalid handle');
callbacks.error('Invalid handle');
return;
}
const config = pluginHandle.webrtcStuff;
if (!config.dtmfSender) {
// Create the DTMF sender, if possible
if (config.myStream) {
const tracks = config.myStream.getAudioTracks();
if (tracks && tracks.length > 0) {
const localAudioTrack = tracks[0];
config.dtmfSender = config.pc.createDTMFSender(localAudioTrack);
this.client.log('Created DTMF Sender');
config.dtmfSender.ontonechange = (tone) => {
this.client.debug('Sent DTMF tone: ' + tone.tone);
};
}
}
if (!config.dtmfSender) {
this.client.warn('Invalid DTMF configuration');
callbacks.error('Invalid DTMF configuration');
return;
}
}
const dtmf = callbacks.dtmf;
if (!dtmf) {
this.client.warn('Invalid DTMF parameters');
callbacks.error('Invalid DTMF parameters');
return;
}
const tones = dtmf.tones;
if (!tones) {
this.client.warn('Invalid DTMF string');
callbacks.error('Invalid DTMF string');
return;
}
let duration = dtmf.duration;
if (!duration) {
duration = 500; // We choose 500ms as the default duration for a tone
}
let gap = dtmf.gap;
if (!gap) {
gap = 50; // We choose 50ms as the default gap between tones
}
this.client.debug('Sending DTMF string ' + tones + ' (duration ' + duration + 'ms, gap ' + gap + 'ms');
config.dtmfSender.insertDTMF(tones, duration, gap);
}
destroy(sync) {
const syncRequest = (sync === true);
this.client.log('Destroying session ' + this.sessionId);
if (!this.connected) {
this.client.warn('Is the gateway down? (connected=false)');
return;
}
if (!this.sessionId) {
this.client.warn('No session to destroy');
this.gatewayCallbacks.destroyed();
return;
}
Reflect.deleteProperty(this.client.sessions, this.sessionId);
// Destroy all handles first
for (const ph in this.pluginHandles) {
if (this.pluginHandles.hasOwnProperty(ph)) {
const phv = this.pluginHandles[ph];
this.client.log('Destroying handle ' + phv.id + ' (' + phv.plugin + ')');
this.destroyHandle(phv.id, null, syncRequest);
}
}
// Ok, go on
var request = {janus: 'destroy', transaction: WebrtcSession.randomString(transationLength)};
if (this.token) {
request.token = this.token;
}
if (this.apisecret) {
request.apisecret = this.apisecret;
}
if (this.websockets) {
request.session_id = this.sessionId;
let onUnbindMessage = null;
let onUnbindError = null;
onUnbindMessage = (event) => {
var data = JSON.parse(event.data);
if (data.session_id === request.session_id && data.transaction === request.transaction) {
this.unbindWebSocket(onUnbindMessage, onUnbindError);
this.gatewayCallbacks.destroyed();
}
};
onUnbindError = () => {
this.unbindWebSocket(onUnbindMessage, onUnbindError);
this.gatewayCallbacks.destroyed();
};
this.ws.addEventListener('message', onUnbindMessage);
this.ws.addEventListener('error', onUnbindError);
this.ws.send(JSON.stringify(request));
}
}
disconnect() {
this.connected = false;
this.ws.close();
}
destroyHandle(handleId, cbs, sync) {
const syncRequest = (sync === true);
this.client.log('Destroying handle ' + handleId + ' (sync=' + syncRequest + ')');
const callbacks = cbs || {};
callbacks.success = (typeof callbacks.success == 'function') ? callbacks.success : this.client.noop;
callbacks.error = (typeof callbacks.error == 'function') ? callbacks.error : this.client.noop;
this.cleanupWebrtc(handleId);
if (!this.connected) {
this.client.warn('Is the gateway down? (connected=false)');
return;
}
const request = {
janus: 'detach',
transaction: WebrtcSession.randomString(transationLength)
};
if (this.token) {
request.token = this.token;
}
if (this.apisecret) {
request.apisecret = this.apisecret;
}
if (this.websockets) {
request.session_id = this.sessionId;
request.handle_id = handleId;
this.ws.send(JSON.stringify(request));
Reflect.deleteProperty(this.pluginHandles, handleId);
callbacks.success();
}
}
streamsDone(handleId, jsep, media, callbacks, stream) {
const pluginHandle = this.pluginHandles[handleId];
if (!pluginHandle || !pluginHandle.webrtcStuff) {
this.client.warn('Invalid handle');
callbacks.error('Invalid handle');
return;
}
const config = pluginHandle.webrtcStuff;
this.client.debug('streamsDone:', stream);
config.myStream = stream;
const pcConfig = {iceServers: this.iceServers};
const pcConstraints = {
optional: [{DtlsSrtpKeyAgreement: true}]
};
this.client.log('Creating PeerConnection');
this.client.debug(pcConstraints);
config.pc = new window.RTCPeerConnection(pcConfig, pcConstraints);
this.client.debug(config.pc);
if (config.pc.getStats) { // FIXME
config.volume.value = 0;
config.bitrate.value = '0 kbits/sec';
}
this.client.log('Preparing local SDP and gathering candidates (trickle=' + config.trickle + ')');
config.pc.onicecandidate = (event) => {
if (!event.candidate || (adapter.browserDetails.browser === 'edge' && event.candidate.candidate.indexOf('endOfCandidates') > 0)) {
this.client.log('End of candidates.');
config.iceDone = true;
if (config.trickle === true) {
// Notify end of candidates
this.sendTrickleCandidate(handleId, {completed: true});
} else {
// No trickle, time to send the complete SDP (including all candidates)
this.sendSDP(handleId, callbacks);
}
} else {
// JSON.stringify doesn't work on some WebRTC objects anymore
// See https://code.google.com/p/chromium/issues/detail?id=467366
const candidate = {
candidate: event.candidate.candidate,
sdpMid: event.candidate.sdpMid,
sdpMLineIndex: event.candidate.sdpMLineIndex
};
if (config.trickle === true) {
// Send candidate
this.sendTrickleCandidate(handleId, candidate);
}
}
};
if (stream) {
this.client.log('Adding local stream');
config.pc.addStream(stream);
pluginHandle.onlocalstream(stream);
}
config.pc.onaddstream = (remoteStream) => {
this.client.log('Handling Remote Stream');
this.client.debug(remoteStream);
config.remoteStream = remoteStream;
pluginHandle.onremotestream(remoteStream.stream);
};
// Any data channel to create?
if (this.isDataEnabled(media)) {
this.client.log('Creating data channel');
const onDataChannelMessage = (event) => {
this.client.log('Received message on data channel: ' + event.data);
pluginHandle.ondata(event.data); // FIXME
};
const onDataChannelStateChange = () => {
const dcState = config.dataChannel ? config.dataChannel.readyState : 'null';
this.client.log('State change on data channel: ' + dcState);
if (dcState === 'open') {
pluginHandle.ondataopen(); // FIXME
}
};
const onDataChannelError = (error) => {
this.client.error('Got error on data channel:', error);
// TODO
};
// Until we implement the proxying of open requests within the this.client core, we open a channel ourselves whatever the case
config.dataChannel = config.pc.createDataChannel('this.clientDataChannel', {ordered: false}); // FIXME Add options (ordered, maxRetransmits, etc.)
config.dataChannel.onmessage = onDataChannelMessage;
config.dataChannel.onopen = onDataChannelStateChange;
config.dataChannel.onclose = onDataChannelStateChange;
config.dataChannel.onerror = onDataChannelError;
}
// Create offer/answer now DO I WANT THIS??
if (jsep) {
config.pc.setRemoteDescription(
new RTCSessionDescription(jsep),
() => {
this.client.log('Remote description accepted!');
this.createAnswer(handleId, media, callbacks);
}, callbacks.error);
} else {
this.createOffer(handleId, media, callbacks);
}
}
prepareWebrtc(handleId, cbs) {
const callbacks = cbs || {};
callbacks.success = (typeof cbs.success == 'function') ? cbs.success : this.client.noop;
callbacks.error = (typeof cbs.error == 'function') ? cbs.error : this.webrtcError;
const jsep = callbacks.jsep;
const media = callbacks.media;
const pluginHandle = this.pluginHandles[handleId];
if (!pluginHandle || !pluginHandle.webrtcStuff) {
this.client.warn('Invalid handle');
callbacks.error('Invalid handle');
return;
}
const config = pluginHandle.webrtcStuff;
// Are we updating a session?
if (config.pc) {
this.client.log('Updating existing media session');
// Create offer/answer now
if (jsep) {
config.pc.setRemoteDescription(
new window.RTCSessionDescription(jsep),