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WIP: prevent stream id from changing when upgrading call

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This commit is contained in:
Bruno Windels 2022-07-05 18:22:36 +02:00
parent 5527e2b22c
commit 206ac6e2dd
3 changed files with 53 additions and 34 deletions
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76
src/matrix/calls/PeerCall.ts
View file

@ -999,49 +999,55 @@ export class PeerCall implements IDisposable {
private updateLocalMedia(localMedia: LocalMedia, logItem: ILogItem): Promise<void> {
return logItem.wrap("updateLocalMedia", async log => {
const oldMedia = this.localMedia;
this.localMedia = localMedia;
const senders = this.peerConnection.getSenders();
const applyStream = async (oldStream: Stream | undefined, stream: Stream | undefined, streamPurpose: SDPStreamMetadataPurpose) => {
const applyTrack = async (oldTrack: Track | undefined, newTrack: Track | undefined) => {
if (!oldTrack && newTrack) {
log.wrap(`adding ${streamPurpose} ${newTrack.kind} track`, log => {
const sender = this.peerConnection.addTrack(newTrack, stream!);
this.options.webRTC.prepareSenderForPurpose(this.peerConnection, sender, streamPurpose);
});
} else if (oldTrack) {
const sender = this.peerConnection.getSenders().find(s => s.track && s.track.id === oldTrack.id);
if (sender) {
if (newTrack && oldTrack.id !== newTrack.id) {
const oldSender = senders.find(s => s.track === oldTrack);
const streamToKeep = (oldStream ?? stream)!;
if (streamToKeep !== stream) {
if (oldTrack) {
streamToKeep.removeTrack(oldTrack);
}
if (newTrack) {
streamToKeep.addTrack(newTrack);
}
}
if (newTrack && oldSender) {
try {
await log.wrap(`replacing ${streamPurpose} ${newTrack.kind} track`, log => {
return sender.replaceTrack(newTrack);
await log.wrap(`attempting to replace ${streamPurpose} ${newTrack.kind} track`, log => {
return oldSender.replaceTrack(newTrack);
});
} catch (err) {
// can't replace the track without renegotiating{
log.wrap(`adding and removing ${streamPurpose} ${newTrack.kind} track`, log => {
this.peerConnection.removeTrack(sender);
const newSender = this.peerConnection.addTrack(newTrack);
// replaceTrack succeeded, nothing left to do
return;
} catch (err) {}
}
if(oldSender) {
log.wrap(`removing ${streamPurpose} ${oldSender.track!.kind} track`, log => {
this.peerConnection.removeTrack(oldSender);
});
}
if (newTrack) {
log.wrap(`adding ${streamPurpose} ${newTrack.kind} track`, log => {
const newSender = this.peerConnection.addTrack(newTrack, streamToKeep);
this.options.webRTC.prepareSenderForPurpose(this.peerConnection, newSender, streamPurpose);
});
}
} else if (!newTrack) {
log.wrap(`removing ${streamPurpose} ${sender.track!.kind} track`, log => {
this.peerConnection.removeTrack(sender);
});
} else {
log.log(`${streamPurpose} ${oldTrack.kind} track hasn't changed`);
}
if (!oldStream && !stream) {
return;
}
// TODO: should we do something if we didn't find the sender? e.g. some other code already removed the sender but didn't update localMedia
}
}
await applyTrack(getStreamAudioTrack(oldStream), getStreamAudioTrack(stream));
await applyTrack(getStreamVideoTrack(oldStream), getStreamVideoTrack(stream));
};
await applyStream(oldMedia?.userMedia, localMedia?.userMedia, SDPStreamMetadataPurpose.Usermedia);
await applyStream(oldMedia?.screenShare, localMedia?.screenShare, SDPStreamMetadataPurpose.Screenshare);
await applyStream(this.localMedia?.userMedia, localMedia?.userMedia, SDPStreamMetadataPurpose.Usermedia);
await applyStream(this.localMedia?.screenShare, localMedia?.screenShare, SDPStreamMetadataPurpose.Screenshare);
// we explicitly don't replace this.localMedia if already set
// as we need to keep the old stream so the stream id doesn't change
// instead we add and remove tracks in the stream in applyTrack
if (!this.localMedia) {
this.localMedia = localMedia;
}
// TODO: datachannel, but don't do it here as we don't want to do it from answer, rather in different method
});
}
@ -1158,3 +1164,13 @@ function enableTransceiver(transceiver: Transceiver, enabled: boolean, exclusive
}
}
}
/**
* tests to write:
*
* upgradeCall: adding a track with setMedia calls the correct methods on the peerConnection
* upgradeCall: removing a track with setMedia calls the correct methods on the peerConnection
* upgradeCall: replacing compatible track with setMedia calls the correct methods on the peerConnection
* upgradeCall: replacing incompatible track (sender.replaceTrack throws) with setMedia calls the correct methods on the peerConnection
*
* */

1
src/matrix/calls/group/Member.ts
View file

@ -293,6 +293,7 @@ export class Member {
async setMedia(localMedia: LocalMedia, previousMedia: LocalMedia): Promise<void> {
const {connection} = this;
if (connection) {
// TODO: see if we can simplify this
connection.localMedia = localMedia.replaceClone(connection.localMedia, previousMedia);
await connection.peerCall?.setMedia(connection.localMedia, connection.logItem);
}

2
src/platform/types/MediaDevices.ts
View file

@ -56,6 +56,8 @@ export interface Stream {
clone(): Stream;
addEventListener<K extends keyof StreamEventMap>(type: K, listener: (this: Stream, ev: StreamEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
removeEventListener<K extends keyof StreamEventMap>(type: K, listener: (this: Stream, ev: StreamEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
addTrack(track: Track);
removeTrack(track: Track);
}
export enum TrackKind {