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fix(playground): FaustEngineBase creates AudioContext if none passed; add stop()/start() methods

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w1n5t0n 2026-04-03 19:08:52 +01:00
parent 3fabc342a0
commit cb3bda034b
1 changed files with 19 additions and 0 deletions
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19
playground/js/synth/faust-engine-base.js
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@ -87,6 +87,9 @@ export class FaustEngineBase extends SynthEngine {
*/ */
async init(audioCtx) { async init(audioCtx) {
if (this._running) return; if (this._running) return;
if (!audioCtx) {
audioCtx = new (window.AudioContext || window.webkitAudioContext)();
}
this._audioCtx = audioCtx; this._audioCtx = audioCtx;
// Step 1: fetch and parse the Faust JSON descriptor → paramMeta // Step 1: fetch and parse the Faust JSON descriptor → paramMeta
@ -137,6 +140,22 @@ export class FaustEngineBase extends SynthEngine {
return this._outputNode; return this._outputNode;
} }
/** Stop audio output (mute, but keep worklet alive for quick restart). */
async stop() {
if (this._masterGain) {
this._masterGain.gain.setTargetAtTime(0, this._audioCtx.currentTime, 0.01);
}
this._running = false;
}
/** Restart audio output after stop(). */
async start() {
if (this._masterGain && this._audioCtx) {
this._masterGain.gain.setTargetAtTime(0.7, this._audioCtx.currentTime, 0.01);
}
this._running = true;
}
/** Release all resources. */ /** Release all resources. */
dispose() { dispose() {
if (this._masterGain) { if (this._masterGain) {