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Merge pull request #12 from matrix-org/voip

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WebRTC support
This commit is contained in:
David Baker
2015-07-15 10:20:56 +01:00
parent 309b61586f 9f3f33e2cc
commit b2f5d0b40a
9 changed files with 1204 additions and 2 deletions
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177
lib/client.js
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@@ -15,6 +15,7 @@ var EventStatus = require("./models/event").EventStatus;
var StubStore = require("./store/stub");
var Room = require("./models/room");
var User = require("./models/user");
var webRtcCall = require("./webrtc/call");
var utils = require("./utils");
// TODO:
@@ -73,6 +74,17 @@ function MatrixClient(opts) {
this._syncingRooms = {
// room_id: Promise
};
this.callList = {
// callId: MatrixCall
};
// try constructing a MatrixCall to see if we are running in an environment
// which has WebRTC. If we are, listen for and handle m.call.* events.
var call = webRtcCall.createNewMatrixCall(this);
if (call) {
setupCallEventHandler(this);
}
}
utils.inherits(MatrixClient, EventEmitter);
@@ -1358,6 +1370,161 @@ function reEmit(reEmitEntity, emittableEntity, eventNames) {
});
}
function setupCallEventHandler(client) {
var candidatesByCall = {
// callId: [Candidate]
};
client.on("event", function(event) {
if (event.getType().indexOf("m.call.") !== 0) {
return; // not a call event
}
var content = event.getContent();
var call = content.call_id ? client.callList[content.call_id] : undefined;
var i;
if (event.getType() === "m.call.invite") {
if (event.getSender() === client.credentials.userId) {
return; // ignore invites you send
}
if (event.getAge() > content.lifetime) {
return; // expired call
}
if (call && call.state === "ended") {
return; // stale/old invite event
}
if (call) {
console.log(
"WARN: Already have a MatrixCall with id %s but got an " +
"invite. Clobbering.",
content.call_id
);
}
call = webRtcCall.createNewMatrixCall(client, event.getRoomId());
if (!call) {
console.log(
"Incoming call ID " + content.call_id + " but this client " +
"doesn't support WebRTC"
);
// don't hang up the call: there could be other clients
// connected that do support WebRTC and declining the
// the call on their behalf would be really annoying.
return;
}
call.callId = content.call_id;
call._initWithInvite(event);
client.callList[call.callId] = call;
// if we stashed candidate events for that call ID, play them back now
if (candidatesByCall[call.callId]) {
for (i = 0; i < candidatesByCall[call.callId].length; i++) {
call._gotRemoteIceCandidate(
candidatesByCall[call.callId][i]
);
}
}
// Were we trying to call that user (room)?
var existingCall;
var existingCalls = utils.values(client.callList);
for (i = 0; i < existingCalls.length; ++i) {
var thisCall = existingCalls[i];
if (call.room_id === thisCall.room_id &&
thisCall.direction === 'outbound' &&
(["wait_local_media", "create_offer", "invite_sent"].indexOf(
thisCall.state) !== -1)) {
existingCall = thisCall;
break;
}
}
if (existingCall) {
// If we've only got to wait_local_media or create_offer and
// we've got an invite, pick the incoming call because we know
// we haven't sent our invite yet otherwise, pick whichever
// call has the lowest call ID (by string comparison)
if (existingCall.state === 'wait_local_media' ||
existingCall.state === 'create_offer' ||
existingCall.callId > call.callId) {
console.log(
"Glare detected: answering incoming call " + call.callId +
" and canceling outgoing call " + existingCall.callId
);
existingCall._replacedBy(call);
call.answer();
}
else {
console.log(
"Glare detected: rejecting incoming call " + call.callId +
" and keeping outgoing call " + existingCall.callId
);
call.hangup();
}
}
else {
client.emit("Call.incoming", call);
}
}
else if (event.getType() === 'm.call.answer') {
if (!call) {
console.log("Got answer for unknown call ID " + content.call_id);
return;
}
if (event.getSender() === client.credentials.userId) {
if (call.state === 'ringing') {
call._onAnsweredElsewhere(content);
}
}
else {
call._receivedAnswer(content);
}
}
else if (event.getType() === 'm.call.candidates') {
if (event.getSender() === client.credentials.userId) {
return;
}
if (!call) {
// store the candidates; we may get a call eventually.
if (!candidatesByCall[content.call_id]) {
candidatesByCall[content.call_id] = [];
}
candidatesByCall[content.call_id] = candidatesByCall[
content.call_id
].concat(content.candidates);
}
else {
for (i = 0; i < content.candidates.length; i++) {
call._gotRemoteIceCandidate(content.candidates[i]);
}
}
}
else if (event.getType() === 'm.call.hangup') {
// Note that we also observe our own hangups here so we can see
// if we've already rejected a call that would otherwise be valid
if (!call) {
// if not live, store the fact that the call has ended because
// we're probably getting events backwards so
// the hangup will come before the invite
call = webRtcCall.createNewMatrixCall(client, event.getRoomId());
if (call) {
call.callId = content.call_id;
call._initWithHangup(event);
client.callList[content.call_id] = call;
}
}
else {
if (call.state !== 'ended') {
call._onHangupReceived(content);
delete client.callList[content.call_id];
}
}
}
});
}
function createNewUser(client, userId) {
var user = new User(userId);
reEmit(client, user, ["User.avatarUrl", "User.displayName", "User.presence"]);
@@ -1452,6 +1619,16 @@ module.exports.MatrixClient = MatrixClient;
* });
*/
/**
* Fires whenever an incoming call arrives.
* @event module:client~MatrixClient#"Call.incoming"
* @param {MatrixCall} call The incoming call.
* @example
* matrixClient.on("Call.incoming", function(call){
* call.answer(); // auto-answer
* });
*/
// EventEmitter JSDocs
/**