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Merge pull request #6710 from matrix-org/travis/voice-messages/audio-…
…queue Add autoplay for voice messages
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/* | ||
Copyright 2021 The Matrix.org Foundation C.I.C. | ||
Licensed under the Apache License, Version 2.0 (the "License"); | ||
you may not use this file except in compliance with the License. | ||
You may obtain a copy of the License at | ||
http://www.apache.org/licenses/LICENSE-2.0 | ||
Unless required by applicable law or agreed to in writing, software | ||
distributed under the License is distributed on an "AS IS" BASIS, | ||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
See the License for the specific language governing permissions and | ||
limitations under the License. | ||
*/ | ||
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import { MatrixClient, MatrixEvent, Room } from "matrix-js-sdk"; | ||
import { Playback, PlaybackState } from "./Playback"; | ||
import { UPDATE_EVENT } from "../stores/AsyncStore"; | ||
import { MatrixClientPeg } from "../MatrixClientPeg"; | ||
import { arrayFastClone } from "../utils/arrays"; | ||
import { PlaybackManager } from "./PlaybackManager"; | ||
import { isVoiceMessage } from "../utils/EventUtils"; | ||
import RoomViewStore from "../stores/RoomViewStore"; | ||
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/** | ||
* Audio playback queue management for a given room. This keeps track of where the user | ||
* was at for each playback, what order the playbacks were played in, and triggers subsequent | ||
* playbacks. | ||
* | ||
* Currently this is only intended to be used by voice messages. | ||
* | ||
* The primary mechanics are: | ||
* * Persisted clock state for each playback instance (tied to Event ID). | ||
* * Limited memory of playback order (see code; not persisted). | ||
* * Autoplay of next eligible playback instance. | ||
*/ | ||
export class PlaybackQueue { | ||
private static queues = new Map<string, PlaybackQueue>(); // keyed by room ID | ||
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private playbacks = new Map<string, Playback>(); // keyed by event ID | ||
private clockStates = new Map<string, number>(); // keyed by event ID | ||
private playbackIdOrder: string[] = []; // event IDs, last == current | ||
private currentPlaybackId: string; // event ID, broken out from above for ease of use | ||
private recentFullPlays = new Set<string>(); // event IDs | ||
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constructor(private client: MatrixClient, private room: Room) { | ||
this.loadClocks(); | ||
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RoomViewStore.addListener(() => { | ||
if (RoomViewStore.getRoomId() === this.room.roomId) { | ||
// Reset the state of the playbacks before they start mounting and enqueuing updates. | ||
// We reset the entirety of the queue, including order, to ensure the user isn't left | ||
// confused with what order the messages are playing in. | ||
this.currentPlaybackId = null; // this in particular stops autoplay when the room is switched to | ||
this.recentFullPlays = new Set<string>(); | ||
this.playbackIdOrder = []; | ||
} | ||
}); | ||
} | ||
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public static forRoom(roomId: string): PlaybackQueue { | ||
const cli = MatrixClientPeg.get(); | ||
const room = cli.getRoom(roomId); | ||
if (!room) throw new Error("Unknown room"); | ||
if (PlaybackQueue.queues.has(room.roomId)) { | ||
return PlaybackQueue.queues.get(room.roomId); | ||
} | ||
const queue = new PlaybackQueue(cli, room); | ||
PlaybackQueue.queues.set(room.roomId, queue); | ||
return queue; | ||
} | ||
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private persistClocks() { | ||
localStorage.setItem( | ||
`mx_voice_message_clocks_${this.room.roomId}`, | ||
JSON.stringify(Array.from(this.clockStates.entries())), | ||
); | ||
} | ||
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private loadClocks() { | ||
const val = localStorage.getItem(`mx_voice_message_clocks_${this.room.roomId}`); | ||
if (!!val) { | ||
this.clockStates = new Map<string, number>(JSON.parse(val)); | ||
} | ||
} | ||
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public unsortedEnqueue(mxEvent: MatrixEvent, playback: Playback) { | ||
// We don't ever detach our listeners: we expect the Playback to clean up for us | ||
this.playbacks.set(mxEvent.getId(), playback); | ||
playback.on(UPDATE_EVENT, (state) => this.onPlaybackStateChange(playback, mxEvent, state)); | ||
playback.clockInfo.liveData.onUpdate((clock) => this.onPlaybackClock(playback, mxEvent, clock)); | ||
} | ||
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private onPlaybackStateChange(playback: Playback, mxEvent: MatrixEvent, newState: PlaybackState) { | ||
// Remember where the user got to in playback | ||
const wasLastPlaying = this.currentPlaybackId === mxEvent.getId(); | ||
if (newState === PlaybackState.Stopped && this.clockStates.has(mxEvent.getId()) && !wasLastPlaying) { | ||
// noinspection JSIgnoredPromiseFromCall | ||
playback.skipTo(this.clockStates.get(mxEvent.getId())); | ||
} else if (newState === PlaybackState.Stopped) { | ||
// Remove the now-useless clock for some space savings | ||
this.clockStates.delete(mxEvent.getId()); | ||
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if (wasLastPlaying) { | ||
this.recentFullPlays.add(this.currentPlaybackId); | ||
const orderClone = arrayFastClone(this.playbackIdOrder); | ||
const last = orderClone.pop(); | ||
if (last === this.currentPlaybackId) { | ||
const next = orderClone.pop(); | ||
if (next) { | ||
const instance = this.playbacks.get(next); | ||
if (!instance) { | ||
console.warn( | ||
"Voice message queue desync: Missing playback for next message: " | ||
+ `Current=${this.currentPlaybackId} Last=${last} Next=${next}`, | ||
); | ||
} else { | ||
this.playbackIdOrder = orderClone; | ||
PlaybackManager.instance.pauseAllExcept(instance); | ||
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// This should cause a Play event, which will re-populate our playback order | ||
// and update our current playback ID. | ||
// noinspection JSIgnoredPromiseFromCall | ||
instance.play(); | ||
} | ||
} else { | ||
// else no explicit next event, so find an event we haven't played that comes next. The live | ||
// timeline is already most recent last, so we can iterate down that. | ||
const timeline = arrayFastClone(this.room.getLiveTimeline().getEvents()); | ||
let scanForVoiceMessage = false; | ||
let nextEv: MatrixEvent; | ||
for (const event of timeline) { | ||
if (event.getId() === mxEvent.getId()) { | ||
scanForVoiceMessage = true; | ||
continue; | ||
} | ||
if (!scanForVoiceMessage) continue; | ||
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// Dev note: This is where we'd break to cause text/non-voice messages to | ||
// interrupt automatic playback. | ||
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const isRightType = isVoiceMessage(event); | ||
const havePlayback = this.playbacks.has(event.getId()); | ||
const isRecentlyCompleted = this.recentFullPlays.has(event.getId()); | ||
if (isRightType && havePlayback && !isRecentlyCompleted) { | ||
nextEv = event; | ||
break; | ||
} | ||
} | ||
if (!nextEv) { | ||
// if we don't have anywhere to go, reset the recent playback queue so the user | ||
// can start a new chain of playbacks. | ||
this.recentFullPlays = new Set<string>(); | ||
this.playbackIdOrder = []; | ||
} else { | ||
this.playbackIdOrder = orderClone; | ||
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const instance = this.playbacks.get(nextEv.getId()); | ||
PlaybackManager.instance.pauseAllExcept(instance); | ||
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// This should cause a Play event, which will re-populate our playback order | ||
// and update our current playback ID. | ||
// noinspection JSIgnoredPromiseFromCall | ||
instance.play(); | ||
} | ||
} | ||
} else { | ||
console.warn( | ||
"Voice message queue desync: Expected playback stop to be last in order. " | ||
+ `Current=${this.currentPlaybackId} Last=${last} EventID=${mxEvent.getId()}`, | ||
); | ||
} | ||
} | ||
} | ||
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if (newState === PlaybackState.Playing) { | ||
const order = this.playbackIdOrder; | ||
if (this.currentPlaybackId !== mxEvent.getId() && !!this.currentPlaybackId) { | ||
if (order.length === 0 || order[order.length - 1] !== this.currentPlaybackId) { | ||
const lastInstance = this.playbacks.get(this.currentPlaybackId); | ||
if ( | ||
lastInstance.currentState === PlaybackState.Playing | ||
|| lastInstance.currentState === PlaybackState.Paused | ||
) { | ||
order.push(this.currentPlaybackId); | ||
} | ||
} | ||
} | ||
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this.currentPlaybackId = mxEvent.getId(); | ||
if (order.length === 0 || order[order.length - 1] !== this.currentPlaybackId) { | ||
order.push(this.currentPlaybackId); | ||
} | ||
} | ||
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// Only persist clock information on pause/stop (end) to avoid overwhelming the storage. | ||
// This should get triggered from normal voice message component unmount due to the playback | ||
// stopping itself for cleanup. | ||
if (newState === PlaybackState.Paused || newState === PlaybackState.Stopped) { | ||
this.persistClocks(); | ||
} | ||
} | ||
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private onPlaybackClock(playback: Playback, mxEvent: MatrixEvent, clocks: number[]) { | ||
if (playback.currentState === PlaybackState.Decoding) return; // ignore pre-ready values | ||
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if (playback.currentState !== PlaybackState.Stopped) { | ||
this.clockStates.set(mxEvent.getId(), clocks[0]); // [0] is the current seek position | ||
} | ||
} | ||
} |
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