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move scheduler to core + move audioctx to userland

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This commit is contained in:
Felix Roos 2022-08-17 21:26:00 +02:00
parent 1cd31cfce9
commit 7af6188a8a
5 changed files with 55 additions and 43 deletions
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56
packages/webaudio/scheduler.mjs
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@ -1,56 +0,0 @@
/*
scheduler.mjs - <short description TODO>
Copyright (C) 2022 Strudel contributors - see <https://github.com/tidalcycles/strudel/blob/main/packages/webaudio/scheduler.mjs>
This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import { ClockWorker } from './clockworker.mjs';
export class Scheduler {
worker;
pattern;
phase;
audioContext;
cps = 1;
constructor({ audioContext, interval = 0.1, onEvent, latency = 0.1 }) {
this.audioContext = audioContext;
this.worker = new ClockWorker((tick, interval) => {
const begin = this.phase;
const end = this.phase + interval * this.cps;
this.phase = end;
const haps = this.pattern.queryArc(begin, end);
haps.forEach((e) => {
if (typeof e.value?.cps === 'number') {
this.setCps(e.value?.cps);
}
if (!e.part.begin.equals(e.whole.begin)) {
return;
}
if (e.context.onTrigger) {
const ctxTime = (e.whole.begin - begin) / this.cps + this.audioContext.currentTime + latency;
e.context.onTrigger(ctxTime, e, this.audioContext.currentTime, this.cps);
}
if (onEvent) {
onEvent?.(e);
}
});
}, interval);
}
start() {
if (!this.pattern) {
throw new Error('Scheduler: no pattern set! call .setPattern first.');
}
this.audioContext.resume();
this.phase = 0;
this.worker.start();
}
stop() {
this.worker.stop();
}
setPattern(pat) {
this.pattern = pat;
}
setCps(cps = 1) {
this.cps = cps;
}
}