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Fixes for call state machine

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* Set 'connecting' state before sending answer, otherwise it can
   race with ICE connecting
 * Ignore completed ice connection state: connected is what we care about
 * Null-check remotestream when stopping media
 * Comments
This commit is contained in:
David Baker
2020-10-09 18:45:45 +01:00
parent 65b24f595c
commit 7f21c591ae
1 changed files with 8 additions and 6 deletions
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14
src/webrtc/call.ts
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@@ -645,8 +645,8 @@ export class MatrixCall extends EventEmitter {
};
private sendAnswer() {
this.setState(CallState.Connecting);
this.sendEvent('m.call.answer', this.answerContent).then(() => {
this.setState(CallState.Connecting);
// If this isn't the first time we've tried to send the answer,
// we may have candidates queued up, so send them now.
this.sendCandidateQueue();
@@ -896,12 +896,11 @@ export class MatrixCall extends EventEmitter {
return; // because ICE can still complete as we're ending the call
}
logger.debug(
"Ice connection state changed to: " + this.peerConn.iceConnectionState,
"ICE connection state changed to: " + this.peerConn.iceConnectionState,
);
// ideally we'd consider the call to be connected when we get media but
// chrome doesn't implement any of the 'onstarted' events yet
if (this.peerConn.iceConnectionState == 'completed' ||
this.peerConn.iceConnectionState == 'connected') {
if (this.peerConn.iceConnectionState == 'connected') {
this.setState(CallState.Connected);
} else if (this.peerConn.iceConnectionState == 'failed') {
this.hangup(CallErrorCode.IceFailed, false);
@@ -1099,8 +1098,10 @@ export class MatrixCall extends EventEmitter {
}
}
for (const track of this.remoteStream.getTracks()) {
track.stop();
if (this.remoteStream) {
for (const track of this.remoteStream.getTracks()) {
track.stop();
}
}
}
@@ -1174,6 +1175,7 @@ export class MatrixCall extends EventEmitter {
iceServers: this.turnServers,
});
// 'connectionstatechange' would be better, but firefox doesn't implement that.
pc.addEventListener('iceconnectionstatechange', this.onIceConnectionStateChanged);
pc.addEventListener('signalingstatechange', this.onSignallingStateChanged);
pc.addEventListener('icecandidate', this.gotLocalIceCandidate);