Files
ChatApp/apps/desktop/src/lib/participantVolumes.ts
T
byGalax a5e930ac17 fix(call): volume>100% crash, picker UI freeze, native-path diagnostics
Volume crash:
- setParticipantVolume / setScreenShareVolume propagated values up to 2.0
(200%) to the per-track GainNode, but also called applyToAttachedElements
which set the raw HTMLAudioElement.volume — that property is hard-clamped
to [0, 1] and throws IndexSizeError above 1. Clip the element-path apply
at 1.0. WebAudio GainNode keeps doing the actual amplification.

Picker freeze:
- Firing ~20 captureScreenSourceThumbnail invokes in parallel caused
perceptible input freezes while each ~100KB base64 result arrived and
triggered a setState. Bounded the worker pool to 4 concurrent captures
with a queue — overall wall-clock is nearly identical and the grid stays
scrollable / clickable throughout the load.

Native-path diagnostics:
- Previous logs only fired on non-NativeCaptureUnavailable errors, so
users couldn't tell whether the native path was skipped (audio toggle
on, no sourceId) or attempted-and-failed. Added explicit info logs for
each skip reason plus an always-on warn with the underlying error when
the try block throws. Makes the next debug pass on screenshare much
quicker.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-04-22 21:50:20 +02:00

103 lines
3.2 KiB
TypeScript

// Per-participant output volume overrides. Values are 0..1 (HTMLMediaElement
// scale). Persisted so the user's mixing choices survive reconnects.
//
// The store is intentionally tiny — a flat Record keyed by LiveKit identity
// (our `userId`). `attachTrack` reads from here when a remote audio track
// first lands; live changes are pushed to any already-attached audio
// elements via the `data-participant` attribute selector.
const STORAGE_KEY = 'call.participantVolumes.v1';
const DEFAULT_VOLUME = 1;
type VolumeMap = Record<string, number>;
type Listener = (map: VolumeMap) => void;
function load(): VolumeMap {
try {
const raw = localStorage.getItem(STORAGE_KEY);
if (!raw) return {};
const parsed: unknown = JSON.parse(raw);
if (!parsed || typeof parsed !== 'object') return {};
const out: VolumeMap = {};
for (const [k, v] of Object.entries(parsed as Record<string, unknown>)) {
if (typeof v === 'number' && Number.isFinite(v)) {
out[k] = clamp(v);
}
}
return out;
} catch {
return {};
}
}
// Matches Discord's slider range — up to 200% via a WebAudio GainNode in
// remoteAudioPipelines (HTMLMediaElement.volume caps at 1.0 on its own).
const MAX_VOLUME = 2;
function clamp(v: number): number {
if (!Number.isFinite(v)) return 0;
if (v < 0) return 0;
if (v > MAX_VOLUME) return MAX_VOLUME;
return v;
}
let current: VolumeMap = load();
const listeners = new Set<Listener>();
function persist(): void {
try {
localStorage.setItem(STORAGE_KEY, JSON.stringify(current));
} catch {
/* ignore quota */
}
}
function notify(): void {
for (const fn of listeners) fn(current);
}
export function getParticipantVolume(userId: string): number {
return current[userId] ?? DEFAULT_VOLUME;
}
export function setParticipantVolume(userId: string, volume: number): void {
const next = clamp(volume);
if (next === (current[userId] ?? DEFAULT_VOLUME)) return;
current = { ...current, [userId]: next };
persist();
applyToAttachedElements(userId, next);
notify();
}
export function subscribeParticipantVolumes(fn: Listener): () => void {
listeners.add(fn);
return () => {
listeners.delete(fn);
};
}
// Apply a volume to any audio elements already attached for this user.
// Attached elements are tagged with `data-participant` in attachTrack.
// HTMLMediaElement.volume is hard-clamped to [0, 1] — anything above 1
// throws IndexSizeError. Values above 1 are only meaningful on the
// WebAudio path (remoteAudioPipelines' GainNode handles them); on the
// plain-element fallback path we clip at 1.0 so the user just hears the
// loudest level the element supports rather than an exception.
function applyToAttachedElements(userId: string, volume: number): void {
const elVolume = Math.min(1, Math.max(0, volume));
const nodes = document.querySelectorAll<HTMLAudioElement>(
'audio[data-participant="' + cssEscape(userId) + '"]',
);
nodes.forEach((el) => {
el.volume = elVolume;
});
}
function cssEscape(v: string): string {
if (typeof (globalThis as { CSS?: { escape?: (s: string) => string } }).CSS
?.escape === 'function') {
return (globalThis as { CSS: { escape: (s: string) => string } }).CSS.escape(v);
}
return v.replace(/"/g, '\\"');
}