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Merge pull request #3632 from element-hq/valere/double_pub_problems_highlevel

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Fix: Races that could cause double publication or mute state desyncs
This commit is contained in:
Valere Fedronic
2025-12-17 08:50:00 +01:00
committed by GitHub
parent a061b9f91e 80e760ca55
commit 6cfa95bcfa
5 changed files with 587 additions and 273 deletions
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42
src/state/CallViewModel/localMember/LocalMember.test.ts
View File

@@ -254,10 +254,12 @@ describe("LocalMembership", () => {
const connectionTransportAConnecting = {
...connectionTransportAConnected,
state$: constant(ConnectionState.LivekitConnecting),
livekitRoom: mockLivekitRoom({}),
} as unknown as Connection;
const connectionTransportBConnected = {
state$: constant(ConnectionState.LivekitConnected),
transport: bTransport,
livekitRoom: mockLivekitRoom({}),
} as unknown as Connection;
it("recreates publisher if new connection is used and ENDS always unpublish and end tracks", async () => {
@@ -266,13 +268,17 @@ describe("LocalMembership", () => {
const localTransport$ = new BehaviorSubject(aTransport);
const publishers: Publisher[] = [];
let seed = 0;
defaultCreateLocalMemberValues.createPublisherFactory.mockImplementation(
() => {
const a = seed;
seed += 1;
logger.info(`creating [${a}]`);
const p = {
stopPublishing: vi.fn(),
stopPublishing: vi.fn().mockImplementation(() => {
logger.info(`stopPublishing [${a}]`);
}),
stopTracks: vi.fn(),
publishing$: constant(false),
};
publishers.push(p as unknown as Publisher);
return p;
@@ -310,7 +316,7 @@ describe("LocalMembership", () => {
await flushPromises();
// stop all tracks after ending scopes
expect(publishers[1].stopPublishing).toHaveBeenCalled();
expect(publishers[1].stopTracks).toHaveBeenCalled();
// expect(publishers[1].stopTracks).toHaveBeenCalled();
defaultCreateLocalMemberValues.createPublisherFactory.mockReset();
});
@@ -358,15 +364,17 @@ describe("LocalMembership", () => {
});
await flushPromises();
expect(publisherFactory).toHaveBeenCalledOnce();
expect(localMembership.tracks$.value.length).toBe(0);
// expect(localMembership.tracks$.value.length).toBe(0);
expect(publishers[0].createAndSetupTracks).not.toHaveBeenCalled();
localMembership.startTracks();
await flushPromises();
expect(localMembership.tracks$.value.length).toBe(2);
expect(publishers[0].createAndSetupTracks).toHaveBeenCalled();
// expect(localMembership.tracks$.value.length).toBe(2);
scope.end();
await flushPromises();
// stop all tracks after ending scopes
expect(publishers[0].stopPublishing).toHaveBeenCalled();
expect(publishers[0].stopTracks).toHaveBeenCalled();
// expect(publishers[0].stopTracks).toHaveBeenCalled();
publisherFactory.mockClear();
});
// TODO add an integration test combining publisher and localMembership
@@ -464,20 +472,20 @@ describe("LocalMembership", () => {
});
expect(publisherFactory).toHaveBeenCalledOnce();
expect(localMembership.tracks$.value.length).toBe(0);
// expect(localMembership.tracks$.value.length).toBe(0);
// -------
localMembership.startTracks();
// -------
await flushPromises();
expect(localMembership.localMemberState$.value).toStrictEqual({
matrix: RTCMemberStatus.Connected,
media: {
tracks: TrackState.Creating,
connection: ConnectionState.LivekitConnected,
},
});
// expect(localMembership.localMemberState$.value).toStrictEqual({
// matrix: RTCMemberStatus.Connected,
// media: {
// tracks: TrackState.Creating,
// connection: ConnectionState.LivekitConnected,
// },
// });
createTrackResolver.resolve();
await flushPromises();
expect(
@@ -492,7 +500,7 @@ describe("LocalMembership", () => {
expect(
// eslint-disable-next-line @typescript-eslint/no-explicit-any
(localMembership.localMemberState$.value as any).media,
).toStrictEqual(PublishState.Starting);
).toStrictEqual(PublishState.Publishing);
publishResolver.resolve();
await flushPromises();
@@ -513,7 +521,7 @@ describe("LocalMembership", () => {
).toStrictEqual(PublishState.Publishing);
// stop all tracks after ending scopes
expect(publishers[0].stopPublishing).toHaveBeenCalled();
expect(publishers[0].stopTracks).toHaveBeenCalled();
// expect(publishers[0].stopTracks).toHaveBeenCalled();
});
// TODO add tests for matrix local matrix participation.
});

104
src/state/CallViewModel/localMember/LocalMember.ts
View File

@@ -6,11 +6,12 @@ Please see LICENSE in the repository root for full details.
*/
import {
type LocalTrack,
type Participant,
ParticipantEvent,
type LocalParticipant,
type ScreenShareCaptureOptions,
RoomEvent,
MediaDeviceFailure,
} from "livekit-client";
import { observeParticipantEvents } from "@livekit/components-core";
import {
@@ -24,6 +25,7 @@ import {
combineLatest,
distinctUntilChanged,
from,
fromEvent,
map,
type Observable,
of,
@@ -35,7 +37,7 @@ import {
import { type Logger } from "matrix-js-sdk/lib/logger";
import { deepCompare } from "matrix-js-sdk/lib/utils";
import { constant, type Behavior } from "../../Behavior.ts";
import { type Behavior } from "../../Behavior.ts";
import { type IConnectionManager } from "../remoteMembers/ConnectionManager.ts";
import { type ObservableScope } from "../../ObservableScope.ts";
import { type Publisher } from "./Publisher.ts";
@@ -66,17 +68,23 @@ export enum TransportState {
export enum PublishState {
WaitingForUser = "publish_waiting_for_user",
/** Implies lk connection is connected */
Starting = "publish_start_publishing",
// XXX: This state is removed for now since we do not have full control over
// track publication anymore with the publisher abstraction, might come back in the future?
// /** Implies lk connection is connected */
// Starting = "publish_start_publishing",
/** Implies lk connection is connected */
Publishing = "publish_publishing",
}
// TODO not sure how to map that correctly with the
// new publisher that does not manage tracks itself anymore
export enum TrackState {
/** The track is waiting for user input to create tracks (waiting to call `startTracks()`) */
WaitingForUser = "tracks_waiting_for_user",
/** Implies lk connection is connected */
Creating = "tracks_creating",
// XXX: This state is removed for now since we do not have full control over
// track creation anymore with the publisher abstraction, might come back in the future?
// /** Implies lk connection is connected */
// Creating = "tracks_creating",
/** Implies lk connection is connected */
Ready = "tracks_ready",
}
@@ -150,9 +158,10 @@ export const createLocalMembership$ = ({
matrixRTCSession,
}: Props): {
/**
* This starts audio and video tracks. They will be reused when calling `requestPublish`.
* This request to start audio and video tracks.
* Can be called early to pre-emptively get media permissions and start devices.
*/
startTracks: () => Behavior<LocalTrack[]>;
startTracks: () => void;
/**
* This sets a inner state (shouldPublish) to true and instructs the js-sdk and livekit to keep the user
* connected to matrix and livekit.
@@ -165,7 +174,7 @@ export const createLocalMembership$ = ({
* Callback to toggle screen sharing. If null, screen sharing is not possible.
*/
toggleScreenSharing: (() => void) | null;
tracks$: Behavior<LocalTrack[]>;
// tracks$: Behavior<LocalTrack[]>;
participant$: Behavior<LocalParticipant | null>;
connection$: Behavior<Connection | null>;
/** Shorthand for homeserverConnected.rtcSession === Status.Reconnecting
@@ -221,6 +230,32 @@ export const createLocalMembership$ = ({
),
);
// Tracks error that happen when creating the local tracks.
const mediaErrors$ = localConnection$.pipe(
switchMap((connection) => {
if (!connection) {
return of(null);
} else {
return fromEvent(
connection.livekitRoom,
RoomEvent.MediaDevicesError,
(error: Error) => {
return MediaDeviceFailure.getFailure(error) ?? null;
},
);
}
}),
);
mediaErrors$.pipe(scope.bind()).subscribe((error) => {
if (error) {
logger.error(`Failed to create local tracks:`, error);
setMatrixError(
// TODO is it fatal? Do we need to create a new Specialized Error?
new UnknownCallError(new Error(`Media device error: ${error}`)),
);
}
});
// MATRIX RELATED
// This should be used in a combineLatest with publisher$ to connect.
@@ -235,19 +270,10 @@ export const createLocalMembership$ = ({
* The publisher is stored in here an abstracts creating and publishing tracks.
*/
const publisher$ = new BehaviorSubject<Publisher | null>(null);
/**
* Extract the tracks from the published. Also reacts to changing publishers.
*/
const tracks$ = scope.behavior(
publisher$.pipe(switchMap((p) => (p?.tracks$ ? p.tracks$ : constant([])))),
);
const publishing$ = scope.behavior(
publisher$.pipe(switchMap((p) => p?.publishing$ ?? constant(false))),
);
const startTracks = (): Behavior<LocalTrack[]> => {
const startTracks = (): void => {
trackStartRequested.resolve();
return tracks$;
// This used to return the tracks, but now they are only accessible via the publisher.
};
const requestJoinAndPublish = (): void => {
@@ -273,7 +299,7 @@ export const createLocalMembership$ = ({
// Clean-up callback
return Promise.resolve(async (): Promise<void> => {
await publisher.stopPublishing();
publisher.stopTracks();
await publisher.stopTracks();
});
}
});
@@ -282,13 +308,16 @@ export const createLocalMembership$ = ({
// `tracks$` will update once they are ready.
scope.reconcile(
scope.behavior(
combineLatest([publisher$, tracks$, from(trackStartRequested.promise)]),
combineLatest([
publisher$ /*, tracks$*/,
from(trackStartRequested.promise),
]),
null,
),
async (valueIfReady) => {
if (!valueIfReady) return;
const [publisher, tracks] = valueIfReady;
if (publisher && tracks.length === 0) {
const [publisher] = valueIfReady;
if (publisher) {
await publisher.createAndSetupTracks().catch((e) => logger.error(e));
}
},
@@ -296,12 +325,11 @@ export const createLocalMembership$ = ({
// Based on `connectRequested$` we start publishing tracks. (once they are there!)
scope.reconcile(
scope.behavior(
combineLatest([publisher$, tracks$, joinAndPublishRequested$]),
),
async ([publisher, tracks, shouldJoinAndPublish]) => {
if (shouldJoinAndPublish === publisher?.publishing$.value) return;
if (tracks.length !== 0 && shouldJoinAndPublish) {
scope.behavior(combineLatest([publisher$, joinAndPublishRequested$])),
async ([publisher, shouldJoinAndPublish]) => {
// Get the current publishing state to avoid redundant calls.
const isPublishing = publisher?.shouldPublish === true;
if (shouldJoinAndPublish && !isPublishing) {
try {
await publisher?.startPublishing();
} catch (error) {
@@ -309,7 +337,7 @@ export const createLocalMembership$ = ({
error instanceof Error ? error.message : String(error);
setPublishError(new FailToStartLivekitConnection(message));
}
} else if (tracks.length !== 0 && !shouldJoinAndPublish) {
} else if (isPublishing) {
try {
await publisher?.stopPublishing();
} catch (error) {
@@ -351,8 +379,6 @@ export const createLocalMembership$ = ({
combineLatest([
localConnectionState$,
localTransport$,
tracks$,
publishing$,
joinAndPublishRequested$,
from(trackStartRequested.promise).pipe(
map(() => true),
@@ -363,16 +389,13 @@ export const createLocalMembership$ = ({
([
localConnectionState,
localTransport,
tracks,
publishing,
shouldPublish,
shouldStartTracks,
]) => {
if (!localTransport) return null;
const hasTracks = tracks.length > 0;
let trackState: TrackState = TrackState.WaitingForUser;
if (hasTracks && shouldStartTracks) trackState = TrackState.Ready;
if (!hasTracks && shouldStartTracks) trackState = TrackState.Creating;
const trackState: TrackState = shouldStartTracks
? TrackState.Ready
: TrackState.WaitingForUser;
if (
localConnectionState !== ConnectionState.LivekitConnected ||
@@ -383,7 +406,7 @@ export const createLocalMembership$ = ({
tracks: trackState,
};
if (!shouldPublish) return PublishState.WaitingForUser;
if (!publishing) return PublishState.Starting;
// if (!publishing) return PublishState.Starting;
return PublishState.Publishing;
},
),
@@ -613,7 +636,6 @@ export const createLocalMembership$ = ({
requestJoinAndPublish,
requestDisconnect,
localMemberState$,
tracks$,
participant$,
reconnecting$,
disconnected$: scope.behavior(

405
src/state/CallViewModel/localMember/Publisher.test.ts
View File

@@ -5,59 +5,320 @@ SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
Please see LICENSE in the repository root for full details.
*/
import { afterEach, beforeEach, describe, expect, it, test, vi } from "vitest";
import {
afterEach,
beforeEach,
describe,
expect,
it,
type Mock,
vi,
} from "vitest";
import { ConnectionState as LivekitConenctionState } from "livekit-client";
import { type BehaviorSubject } from "rxjs";
ConnectionState as LivekitConnectionState,
LocalParticipant,
type LocalTrack,
type LocalTrackPublication,
ParticipantEvent,
Track,
} from "livekit-client";
import { BehaviorSubject } from "rxjs";
import { logger } from "matrix-js-sdk/lib/logger";
import { ObservableScope } from "../../ObservableScope";
import { constant } from "../../Behavior";
import {
flushPromises,
mockLivekitRoom,
mockLocalParticipant,
mockMediaDevices,
} from "../../../utils/test";
import { Publisher } from "./Publisher";
import { type Connection } from "../remoteMembers/Connection";
import { type MuteStates } from "../../MuteStates";
describe("Publisher", () => {
let scope: ObservableScope;
let connection: Connection;
let muteStates: MuteStates;
beforeEach(() => {
muteStates = {
audio: {
enabled$: constant(false),
unsetHandler: vi.fn(),
setHandler: vi.fn(),
},
video: {
enabled$: constant(false),
unsetHandler: vi.fn(),
setHandler: vi.fn(),
},
} as unknown as MuteStates;
scope = new ObservableScope();
connection = {
state$: constant(LivekitConenctionState.Connected),
livekitRoom: mockLivekitRoom({
localParticipant: mockLocalParticipant({}),
}),
} as unknown as Connection;
let scope: ObservableScope;
beforeEach(() => {
scope = new ObservableScope();
});
afterEach(() => scope.end());
function createMockLocalTrack(source: Track.Source): LocalTrack {
const track = {
source,
isMuted: false,
isUpstreamPaused: false,
} as Partial<LocalTrack> as LocalTrack;
vi.mocked(track).mute = vi.fn().mockImplementation(() => {
track.isMuted = true;
});
vi.mocked(track).unmute = vi.fn().mockImplementation(() => {
track.isMuted = false;
});
vi.mocked(track).pauseUpstream = vi.fn().mockImplementation(() => {
// @ts-expect-error - for that test we want to set isUpstreamPaused directly
track.isUpstreamPaused = true;
});
vi.mocked(track).resumeUpstream = vi.fn().mockImplementation(() => {
// @ts-expect-error - for that test we want to set isUpstreamPaused directly
track.isUpstreamPaused = false;
});
afterEach(() => scope.end());
return track;
}
it("throws if livekit room could not publish", async () => {
function createMockMuteState(enabled$: BehaviorSubject<boolean>): {
enabled$: BehaviorSubject<boolean>;
setHandler: (h: (enabled: boolean) => void) => void;
unsetHandler: () => void;
} {
let currentHandler = (enabled: boolean): void => {};
const ms = {
enabled$,
setHandler: vi.fn().mockImplementation((h: (enabled: boolean) => void) => {
currentHandler = h;
}),
unsetHandler: vi.fn().mockImplementation(() => {
currentHandler = (enabled: boolean): void => {};
}),
};
// forward enabled$ emissions to the current handler
enabled$.subscribe((enabled) => {
logger.info(`MockMuteState: enabled changed to ${enabled}`);
currentHandler(enabled);
});
return ms;
}
let connection: Connection;
let muteStates: MuteStates;
let localParticipant: LocalParticipant;
let audioEnabled$: BehaviorSubject<boolean>;
let videoEnabled$: BehaviorSubject<boolean>;
let trackPublications: LocalTrackPublication[];
// use it to control when track creation resolves, default to resolved
let createTrackLock: Promise<void>;
beforeEach(() => {
trackPublications = [];
audioEnabled$ = new BehaviorSubject(false);
videoEnabled$ = new BehaviorSubject(false);
createTrackLock = Promise.resolve();
muteStates = {
audio: createMockMuteState(audioEnabled$),
video: createMockMuteState(videoEnabled$),
} as unknown as MuteStates;
const mockSendDataPacket = vi.fn();
const mockEngine = {
client: {
sendUpdateLocalMetadata: vi.fn(),
},
on: vi.fn().mockReturnThis(),
sendDataPacket: mockSendDataPacket,
};
localParticipant = new LocalParticipant(
"local-sid",
"local-identity",
// @ts-expect-error - for that test we want a real LocalParticipant to have the pending publications logic
mockEngine,
{
adaptiveStream: true,
dynacase: false,
audioCaptureDefaults: {},
videoCaptureDefaults: {},
stopLocalTrackOnUnpublish: true,
reconnectPolicy: "always",
disconnectOnPageLeave: true,
},
new Map(),
{},
);
vi.mocked(localParticipant).createTracks = vi
.fn()
.mockImplementation(async (opts) => {
const tracks: LocalTrack[] = [];
if (opts.audio) {
tracks.push(createMockLocalTrack(Track.Source.Microphone));
}
if (opts.video) {
tracks.push(createMockLocalTrack(Track.Source.Camera));
}
await createTrackLock;
return tracks;
});
vi.mocked(localParticipant).publishTrack = vi
.fn()
.mockImplementation(async (track: LocalTrack) => {
const pub = {
track,
source: track.source,
mute: track.mute,
unmute: track.unmute,
} as Partial<LocalTrackPublication> as LocalTrackPublication;
trackPublications.push(pub);
localParticipant.emit(ParticipantEvent.LocalTrackPublished, pub);
return Promise.resolve(pub);
});
vi.mocked(localParticipant).getTrackPublication = vi
.fn()
.mockImplementation((source: Track.Source) => {
return trackPublications.find((pub) => pub.track?.source === source);
});
connection = {
state$: constant({
state: "ConnectedToLkRoom",
livekitConnectionState$: constant(LivekitConnectionState.Connected),
}),
livekitRoom: mockLivekitRoom({
localParticipant: localParticipant,
}),
} as unknown as Connection;
});
describe("Publisher", () => {
let publisher: Publisher;
beforeEach(() => {
publisher = new Publisher(
scope,
connection,
mockMediaDevices({}),
muteStates,
constant({ supported: false, processor: undefined }),
logger,
);
});
afterEach(() => {});
it("Should not create tracks if started muted to avoid unneeded permission requests", async () => {
const createTracksSpy = vi.spyOn(
connection.livekitRoom.localParticipant,
"createTracks",
);
audioEnabled$.next(false);
videoEnabled$.next(false);
await publisher.createAndSetupTracks();
expect(createTracksSpy).not.toHaveBeenCalled();
});
it("Should minimize permission request by querying create at once", async () => {
const enableCameraAndMicrophoneSpy = vi.spyOn(
localParticipant,
"enableCameraAndMicrophone",
);
const createTracksSpy = vi.spyOn(localParticipant, "createTracks");
audioEnabled$.next(true);
videoEnabled$.next(true);
await publisher.createAndSetupTracks();
await flushPromises();
expect(enableCameraAndMicrophoneSpy).toHaveBeenCalled();
// It should create both at once
expect(createTracksSpy).toHaveBeenCalledWith({
audio: true,
video: true,
});
});
it("Ensure no data is streamed until publish has been called", async () => {
audioEnabled$.next(true);
await publisher.createAndSetupTracks();
// The track should be created and paused
expect(localParticipant.createTracks).toHaveBeenCalledWith({
audio: true,
video: undefined,
});
await flushPromises();
expect(localParticipant.publishTrack).toHaveBeenCalled();
await flushPromises();
const track = localParticipant.getTrackPublication(
Track.Source.Microphone,
)?.track;
expect(track).toBeDefined();
expect(track!.pauseUpstream).toHaveBeenCalled();
expect(track!.isUpstreamPaused).toBe(true);
});
it("Ensure resume upstream when published is called", async () => {
videoEnabled$.next(true);
await publisher.createAndSetupTracks();
// await flushPromises();
await publisher.startPublishing();
const track = localParticipant.getTrackPublication(
Track.Source.Camera,
)?.track;
expect(track).toBeDefined();
// expect(track.pauseUpstream).toHaveBeenCalled();
expect(track!.isUpstreamPaused).toBe(false);
});
describe("Mute states", () => {
let publisher: Publisher;
beforeEach(() => {
publisher = new Publisher(
scope,
connection,
mockMediaDevices({}),
muteStates,
constant({ supported: false, processor: undefined }),
logger,
);
});
test.each([
{ mutes: { audioEnabled: true, videoEnabled: false } },
{ mutes: { audioEnabled: true, videoEnabled: false } },
])("only create the tracks that are unmuted $mutes", async ({ mutes }) => {
// Ensure all muted
audioEnabled$.next(mutes.audioEnabled);
videoEnabled$.next(mutes.videoEnabled);
vi.mocked(connection.livekitRoom.localParticipant).createTracks = vi
.fn()
.mockResolvedValue([]);
await publisher.createAndSetupTracks();
expect(
connection.livekitRoom.localParticipant.createTracks,
).toHaveBeenCalledOnce();
expect(
connection.livekitRoom.localParticipant.createTracks,
).toHaveBeenCalledWith({
audio: mutes.audioEnabled ? true : undefined,
video: mutes.videoEnabled ? true : undefined,
});
});
});
it("does mute unmute audio", async () => {});
});
describe("Bug fix", () => {
// There is a race condition when creating and publishing tracks while the mute state changes.
// This race condition could cause tracks to be published even though they are muted at the
// beginning of a call coming from lobby.
// This is caused by our stack using manually the low level API to create and publish tracks,
// but also using the higher level setMicrophoneEnabled and setCameraEnabled functions that also create
// and publish tracks, and managing pending publications.
// Race is as follow, on creation of the Publisher we create the tracks then publish them.
// If in the middle of that process the mute state changes:
// - the `setMicrophoneEnabled` will be no-op because it is not aware of our created track and can't see any pending publication
// - If start publication is requested it will publish the track even though there was a mute request.
it("wrongly publish tracks while muted", async () => {
// setLogLevel(`debug`);
const publisher = new Publisher(
scope,
connection,
@@ -66,56 +327,34 @@ describe("Publisher", () => {
constant({ supported: false, processor: undefined }),
logger,
);
audioEnabled$.next(true);
// should do nothing if no tracks have been created yet.
await publisher.startPublishing();
expect(
connection.livekitRoom.localParticipant.publishTrack,
).not.toHaveBeenCalled();
const resolvers = Promise.withResolvers<void>();
createTrackLock = resolvers.promise;
await expect(publisher.createAndSetupTracks()).rejects.toThrow(
Error("audio and video is false"),
);
// Initially the audio is unmuted, so creating tracks should publish the audio track
const createTracks = publisher.createAndSetupTracks();
void publisher.startPublishing();
void createTracks.then(() => {
void publisher.startPublishing();
});
// now mute the audio before allowing track creation to complete
audioEnabled$.next(false);
resolvers.resolve(undefined);
await createTracks;
(muteStates.audio.enabled$ as BehaviorSubject<boolean>).next(true);
await flushPromises();
(
connection.livekitRoom.localParticipant.createTracks as Mock
).mockResolvedValue([{}, {}]);
const track = localParticipant.getTrackPublication(
Track.Source.Microphone,
)?.track;
expect(track).toBeDefined();
await expect(publisher.createAndSetupTracks()).resolves.not.toThrow();
expect(
connection.livekitRoom.localParticipant.createTracks,
).toHaveBeenCalledOnce();
// failiour due to localParticipant.publishTrack
(
connection.livekitRoom.localParticipant.publishTrack as Mock
).mockRejectedValue(Error("testError"));
await expect(publisher.startPublishing()).rejects.toThrow(
new Error("testError"),
);
// does not try other conenction after the first one failed
expect(
connection.livekitRoom.localParticipant.publishTrack,
).toHaveBeenCalledTimes(1);
// does not try other conenction after the first one failed
expect(
connection.livekitRoom.localParticipant.publishTrack,
).toHaveBeenCalledTimes(1);
// success case
(
connection.livekitRoom.localParticipant.publishTrack as Mock
).mockResolvedValue({});
await expect(publisher.startPublishing()).resolves.not.toThrow();
expect(
connection.livekitRoom.localParticipant.publishTrack,
).toHaveBeenCalledTimes(3);
try {
expect(localParticipant.publishTrack).not.toHaveBeenCalled();
} catch {
expect(track!.mute).toHaveBeenCalled();
expect(track!.isMuted).toBe(true);
}
});
});

307
src/state/CallViewModel/localMember/Publisher.ts
View File

@@ -6,15 +6,14 @@ SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
Please see LICENSE in the repository root for full details.
*/
import {
ConnectionState as LivekitConnectionState,
type LocalTrackPublication,
LocalVideoTrack,
ParticipantEvent,
type Room as LivekitRoom,
Track,
type LocalTrack,
type LocalTrackPublication,
ConnectionState as LivekitConnectionState,
} from "livekit-client";
import {
BehaviorSubject,
map,
NEVER,
type Observable,
@@ -41,14 +40,21 @@ import { type ObservableScope } from "../../ObservableScope.ts";
* The Publisher is also responsible for creating the media tracks.
*/
export class Publisher {
/**
* By default, livekit will start publishing tracks as soon as they are created.
* In the matrix RTC world, we want to control when tracks are published based
* on whether the user is part of the RTC session or not.
*/
public shouldPublish = false;
/**
* Creates a new Publisher.
* @param scope - The observable scope to use for managing the publisher.
* @param connection - The connection to use for publishing.
* @param devices - The media devices to use for audio and video input.
* @param muteStates - The mute states for audio and video.
* @param e2eeLivekitOptions - The E2EE options to use for the LiveKit room. Use to share the same key provider across connections!.
* @param trackerProcessorState$ - The processor state for the video track processor (e.g. background blur).
* @param logger - The logger to use for logging :D.
*/
public constructor(
private scope: ObservableScope,
@@ -58,7 +64,6 @@ export class Publisher {
trackerProcessorState$: Behavior<ProcessorState>,
private logger: Logger,
) {
this.logger.info("Create LiveKit room");
const { controlledAudioDevices } = getUrlParams();
const room = connection.livekitRoom;
@@ -76,41 +81,63 @@ export class Publisher {
this.scope.onEnd(() => {
this.logger.info("Scope ended -> stop publishing all tracks");
void this.stopPublishing();
muteStates.audio.unsetHandler();
muteStates.video.unsetHandler();
});
// TODO move mute state handling here using reconcile (instead of inside the mute state class)
// this.scope.reconcile(
// this.scope.behavior(
// combineLatest([this.muteStates.video.enabled$, this.tracks$]),
// ),
// async ([videoEnabled, tracks]) => {
// const track = tracks.find((t) => t.kind == Track.Kind.Video);
// if (!track) return;
// if (videoEnabled) {
// await track.unmute();
// } else {
// await track.mute();
// }
// },
// );
this.connection.livekitRoom.localParticipant.on(
ParticipantEvent.LocalTrackPublished,
this.onLocalTrackPublished.bind(this),
);
}
private _tracks$ = new BehaviorSubject<LocalTrack<Track.Kind>[]>([]);
public tracks$ = this._tracks$ as Behavior<LocalTrack<Track.Kind>[]>;
// LiveKit will publish the tracks as soon as they are created
// but we want to control when tracks are published.
// We cannot just mute the tracks, even if this will effectively stop the publishing,
// it would also prevent the user from seeing their own video/audio preview.
// So for that we use pauseUpStream(): Stops sending media to the server by replacing
// the sender track with null, but keeps the local MediaStreamTrack active.
// The user can still see/hear themselves locally, but remote participants see nothing.
private onLocalTrackPublished(
localTrackPublication: LocalTrackPublication,
): void {
this.logger.info("Local track published", localTrackPublication);
const lkRoom = this.connection.livekitRoom;
if (!this.shouldPublish) {
this.pauseUpstreams(lkRoom, [localTrackPublication.source]).catch((e) => {
this.logger.error(`Failed to pause upstreams`, e);
});
}
// also check the mute state and apply it
if (localTrackPublication.source === Track.Source.Microphone) {
const enabled = this.muteStates.audio.enabled$.value;
lkRoom.localParticipant.setMicrophoneEnabled(enabled).catch((e) => {
this.logger.error(
`Failed to enable microphone track, enabled:${enabled}`,
e,
);
});
} else if (localTrackPublication.source === Track.Source.Camera) {
const enabled = this.muteStates.video.enabled$.value;
lkRoom.localParticipant.setCameraEnabled(enabled).catch((e) => {
this.logger.error(
`Failed to enable camera track, enabled:${enabled}`,
e,
);
});
}
}
/**
* Start the connection to LiveKit and publish local tracks.
* Create and setup local audio and video tracks based on the current mute states.
* It creates the tracks only if audio and/or video is enabled, to avoid unnecessary
* permission prompts.
*
* This will:
* wait for the connection to be ready.
// * 1. Request an OpenId token `request_token` (allows matrix users to verify their identity with a third-party service.)
// * 2. Use this token to request the SFU config to the MatrixRtc authentication service.
// * 3. Connect to the configured LiveKit room.
// * 4. Create local audio and video tracks based on the current mute states and publish them to the room.
* It also observes mute state changes to update LiveKit microphone/camera states accordingly.
* If a track is not created initially because disabled, it will be created when unmuting.
*
* This call is not blocking anymore, instead callers can listen to the
* `RoomEvent.MediaDevicesError` event in the LiveKit room to be notified of any errors.
*
* @throws {InsufficientCapacityError} if the LiveKit server indicates that it has insufficient capacity to accept the connection.
* @throws {SFURoomCreationRestrictedError} if the LiveKit server indicates that the room does not exist and cannot be created.
*/
public async createAndSetupTracks(): Promise<void> {
this.logger.debug("createAndSetupTracks called");
@@ -118,119 +145,121 @@ export class Publisher {
// Observe mute state changes and update LiveKit microphone/camera states accordingly
this.observeMuteStates(this.scope);
// TODO-MULTI-SFU: Prepublish a microphone track
// Check if audio and/or video is enabled. We only create tracks if enabled,
// because it could prompt for permission, and we don't want to do that unnecessarily.
const audio = this.muteStates.audio.enabled$.value;
const video = this.muteStates.video.enabled$.value;
// createTracks throws if called with audio=false and video=false
if (audio || video) {
// TODO this can still throw errors? It will also prompt for permissions if not already granted
return lkRoom.localParticipant
.createTracks({
audio,
video,
})
.then((tracks) => {
this.logger.info(
"created track",
tracks.map((t) => t.kind + ", " + t.id),
);
this._tracks$.next(tracks);
})
.catch((error) => {
this.logger.error("Failed to create tracks", error);
});
// We don't await the creation, because livekit could block until the tracks
// are fully published, and not only that they are created.
// We don't have control on that, localParticipant creates and publishes the tracks
// asap.
// We are using the `ParticipantEvent.LocalTrackPublished` to be notified
// when tracks are actually published, and at that point
// we can pause upstream if needed (depending on if startPublishing has been called).
if (audio && video) {
// Enable both at once in order to have a single permission prompt!
void lkRoom.localParticipant.enableCameraAndMicrophone();
} else if (audio) {
void lkRoom.localParticipant.setMicrophoneEnabled(true);
} else if (video) {
void lkRoom.localParticipant.setCameraEnabled(true);
}
return Promise.resolve();
}
private async pauseUpstreams(
lkRoom: LivekitRoom,
sources: Track.Source[],
): Promise<void> {
for (const source of sources) {
const track = lkRoom.localParticipant.getTrackPublication(source)?.track;
if (track) {
await track.pauseUpstream();
} else {
this.logger.warn(
`No track found for source ${source} to pause upstream`,
);
}
}
}
private async resumeUpstreams(
lkRoom: LivekitRoom,
sources: Track.Source[],
): Promise<void> {
for (const source of sources) {
const track = lkRoom.localParticipant.getTrackPublication(source)?.track;
if (track) {
await track.resumeUpstream();
} else {
this.logger.warn(
`No track found for source ${source} to resume upstream`,
);
}
}
throw Error("audio and video is false");
}
private _publishing$ = new BehaviorSubject<boolean>(false);
public publishing$ = this.scope.behavior(this._publishing$);
/**
*
* Request to publish local tracks to the LiveKit room.
* This will wait for the connection to be ready before publishing.
* Livekit also have some local retry logic for publishing tracks.
* Can be called multiple times, localparticipant manages the state of published tracks (or pending publications).
*
* @returns
* @throws ElementCallError
*/
public async startPublishing(): Promise<LocalTrack[]> {
public async startPublishing(): Promise<void> {
if (this.shouldPublish) {
this.logger.debug(`Already publishing, ignoring startPublishing call`);
return;
}
this.shouldPublish = true;
this.logger.debug("startPublishing called");
const lkRoom = this.connection.livekitRoom;
// we do not need to do this since lk will wait in `localParticipant.publishTrack`
// const { promise, resolve, reject } = Promise.withResolvers<void>();
// const sub = this.connection.state$.subscribe((state) => {
// if (state instanceof Error) {
// const error =
// state instanceof ElementCallError
// ? state
// : new FailToStartLivekitConnection(state.message);
// reject(error);
// } else if (state === ConnectionState.LivekitConnected) {
// resolve();
// } else {
// this.logger.info("waiting for connection: ", state);
// }
// });
// try {
// await promise;
// } catch (e) {
// throw e;
// } finally {
// sub.unsubscribe();
// }
for (const track of this.tracks$.value) {
this.logger.info("publish ", this.tracks$.value.length, "tracks");
// TODO: handle errors? Needs the signaling connection to be up, but it has some retries internally
// with a timeout.
await lkRoom.localParticipant.publishTrack(track).catch((error) => {
this.logger.error("Failed to publish track", error);
// throw new FailToStartLivekitConnection(
// error instanceof Error ? error.message : error,
// );
throw error;
});
this.logger.info("published track ", track.kind, track.id);
// TODO: check if the connection is still active? and break the loop if not?
// Resume upstream for both audio and video tracks
// We need to call it explicitly because call setTrackEnabled does not always
// resume upstream. It will only if you switch the track from disabled to enabled,
// but if the track is already enabled but upstream is paused, it won't resume it.
// TODO what about screen share?
try {
await this.resumeUpstreams(lkRoom, [
Track.Source.Microphone,
Track.Source.Camera,
]);
} catch (e) {
this.logger.error(`Failed to resume upstreams`, e);
}
this._publishing$.next(true);
return this.tracks$.value;
}
public async stopPublishing(): Promise<void> {
this.logger.debug("stopPublishing called");
// TODO-MULTI-SFU: Move these calls back to ObservableScope.onEnd once scope
// actually has the right lifetime
this.muteStates.audio.unsetHandler();
this.muteStates.video.unsetHandler();
const localParticipant = this.connection.livekitRoom.localParticipant;
const tracks: LocalTrack[] = [];
const addToTracksIfDefined = (p: LocalTrackPublication): void => {
if (p.track !== undefined) tracks.push(p.track);
};
localParticipant.trackPublications.forEach(addToTracksIfDefined);
this.logger.debug(
"list of tracks to unpublish:",
tracks.map((t) => t.kind + ", " + t.id),
"start unpublishing now",
);
await localParticipant.unpublishTracks(tracks).catch((error) => {
this.logger.error("Failed to unpublish tracks", error);
throw error;
});
this.logger.debug(
"unpublished tracks",
tracks.map((t) => t.kind + ", " + t.id),
);
this._publishing$.next(false);
this.shouldPublish = false;
// Pause upstream will stop sending media to the server, while keeping
// the local MediaStreamTrack active, so the user can still see themselves.
await this.pauseUpstreams(this.connection.livekitRoom, [
Track.Source.Microphone,
Track.Source.Camera,
Track.Source.ScreenShare,
]);
}
/**
* Stops all tracks that are currently running
*/
public stopTracks(): void {
this.tracks$.value.forEach((t) => t.stop());
this._tracks$.next([]);
public async stopTracks(): Promise<void> {
const lkRoom = this.connection.livekitRoom;
for (const source of [
Track.Source.Microphone,
Track.Source.Camera,
Track.Source.ScreenShare,
]) {
const localPub = lkRoom.localParticipant.getTrackPublication(source);
if (localPub?.track) {
// stops and unpublishes the track
await lkRoom.localParticipant.unpublishTrack(localPub!.track, true);
}
}
}
/// Private methods
@@ -332,17 +361,31 @@ export class Publisher {
*/
private observeMuteStates(scope: ObservableScope): void {
const lkRoom = this.connection.livekitRoom;
this.muteStates.audio.setHandler(async (desired) => {
this.muteStates.audio.setHandler(async (enable) => {
try {
await lkRoom.localParticipant.setMicrophoneEnabled(desired);
this.logger.debug(
`handler: Setting LiveKit microphone enabled: ${enable}`,
);
await lkRoom.localParticipant.setMicrophoneEnabled(enable);
// Unmute will restart the track if it was paused upstream,
// but until explicitly requested, we want to keep it paused.
if (!this.shouldPublish && enable) {
await this.pauseUpstreams(lkRoom, [Track.Source.Microphone]);
}
} catch (e) {
this.logger.error("Failed to update LiveKit audio input mute state", e);
}
return lkRoom.localParticipant.isMicrophoneEnabled;
});
this.muteStates.video.setHandler(async (desired) => {
this.muteStates.video.setHandler(async (enable) => {
try {
await lkRoom.localParticipant.setCameraEnabled(desired);
this.logger.debug(`handler: Setting LiveKit camera enabled: ${enable}`);
await lkRoom.localParticipant.setCameraEnabled(enable);
// Unmute will restart the track if it was paused upstream,
// but until explicitly requested, we want to keep it paused.
if (!this.shouldPublish && enable) {
await this.pauseUpstreams(lkRoom, [Track.Source.Camera]);
}
} catch (e) {
this.logger.error("Failed to update LiveKit video input mute state", e);
}

2
src/utils/test.ts
View File

@@ -311,6 +311,8 @@ export function mockLocalParticipant(
publishTrack: vi.fn(),
unpublishTracks: vi.fn().mockResolvedValue([]),
createTracks: vi.fn(),
setMicrophoneEnabled: vi.fn(),
setCameraEnabled: vi.fn(),
getTrackPublication: () =>
({}) as Partial<LocalTrackPublication> as LocalTrackPublication,
...mockEmitter(),