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remove unessecary cyclist changes

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Jade (Rose) Rowland 2025-07-08 00:44:57 -04:00
parent 15fe2734e9
commit 6327e17feb
1 changed files with 66 additions and 46 deletions
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112
packages/core/cyclist.mjs
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@ -1,6 +1,6 @@
/*
cyclist.mjs - event scheduler for a single strudel instance. for multi-instance scheduler, see - see <https://github.com/tidalcycles/strudel/blob/main/packages/core/neocyclist.mjs>
Copyright (C) 2022 Strudel contributors - see <https://github.com/tidalcycles/strudel/blob/main/packages/core/cyclist.mjs>
cyclist.mjs - event scheduler for a single strudel instance. for multi-instance scheduler, see - see <https://codeberg.org/uzu/strudel/src/branch/main/packages/core/neocyclist.mjs>
Copyright (C) 2022 Strudel contributors - see <https://codeberg.org/uzu/strudel/src/branch/main/packages/core/cyclist.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/>.
*/
@ -8,47 +8,76 @@ import createClock from './zyklus.mjs';
import { logger } from './logger.mjs';
export class Cyclist {
constructor({ interval = 0.05, onTrigger, onToggle, onError, getTime, latency = 0.1, setInterval, clearInterval }) {
constructor({
interval,
onTrigger,
onToggle,
onError,
getTime,
latency = 0.1,
setInterval,
clearInterval,
beforeStart,
}) {
this.started = false;
this.beforeStart = beforeStart;
this.cps = 0.5;
this.time_at_last_tick_message = 0;
this.cycle = 0;
this.num_ticks_since_cps_change = 0;
this.lastTick = 0; // absolute time when last tick (clock callback) happened
this.lastBegin = 0; // query begin of last tick
this.lastEnd = 0; // query end of last tick
this.getTime = getTime; // get absolute time
this.num_cycles_at_cps_change = 0;
this.seconds_at_cps_change; // clock phase when cps was changed
this.num_ticks_since_cps_change = 0;
this.onToggle = onToggle;
this.latency = latency; // fixed trigger time offset
this.interval = interval;
this.clock = createClock(
getTime,
// called slightly before each cycle
(lastTick, duration, _, time) => {
if (this.started === false) {
return;
(phase, duration, _, t) => {
if (this.num_ticks_since_cps_change === 0) {
this.num_cycles_at_cps_change = this.lastEnd;
this.seconds_at_cps_change = phase;
}
const num_seconds_since_cps_change = this.num_ticks_since_cps_change * duration;
const tickdeadline = lastTick - time;
const num_cycles_since_cps_change = num_seconds_since_cps_change * this.cps;
const begin = this.num_cycles_at_cps_change + num_cycles_since_cps_change;
const secondsSinceLastTick = time - lastTick - duration;
const eventLength = duration * this.cps;
const end = begin + eventLength;
this.cycle = begin + secondsSinceLastTick * this.cps;
const haps = this.pattern.queryArc(begin, end, { _cps: this.cps });
haps.forEach((hap) => {
if (hap.hasOnset()) {
let targetTime = (hap.whole.begin - this.num_cycles_at_cps_change) / this.cps;
targetTime = targetTime + this.latency + tickdeadline + time - num_seconds_since_cps_change;
const duration = hap.duration / this.cps;
onTrigger?.(hap, tickdeadline, duration, this.cps, targetTime);
}
});
this.time_at_last_tick_message = time;
this.num_ticks_since_cps_change++;
const seconds_since_cps_change = this.num_ticks_since_cps_change * duration;
const num_cycles_since_cps_change = seconds_since_cps_change * this.cps;
try {
const begin = this.lastEnd;
this.lastBegin = begin;
const end = this.num_cycles_at_cps_change + num_cycles_since_cps_change;
this.lastEnd = end;
this.lastTick = phase;
if (phase < t) {
// avoid querying haps that are in the past anyway
console.log(`skip query: too late`);
return;
}
// query the pattern for events
const haps = this.pattern.queryArc(begin, end, { _cps: this.cps });
haps.forEach((hap) => {
if (hap.hasOnset()) {
const targetTime =
(hap.whole.begin - this.num_cycles_at_cps_change) / this.cps + this.seconds_at_cps_change + latency;
const duration = hap.duration / this.cps;
// the following line is dumb and only here for backwards compatibility
// see https://codeberg.org/uzu/strudel/pulls/1004
const deadline = targetTime - phase;
onTrigger?.(hap, deadline, duration, this.cps, targetTime);
if (hap.value.cps !== undefined && this.cps != hap.value.cps) {
this.cps = hap.value.cps;
this.num_ticks_since_cps_change = 0;
}
}
});
} catch (e) {
logger(`[cyclist] error: ${e.message}`);
onError?.(e);
}
},
interval, // duration of each cycle
0.1,
@ -61,24 +90,17 @@ export class Cyclist {
if (!this.started) {
return 0;
}
const gap = (this.getTime() - this.time_at_last_tick_message) * this.cps;
return this.cycle + gap;
const secondsSinceLastTick = this.getTime() - this.lastTick - this.clock.duration;
return this.lastBegin + secondsSinceLastTick * this.cps; // + this.clock.minLatency;
}
setCycle = (cycle) => {
this.num_ticks_since_cps_change = 0;
this.num_cycles_at_cps_change = cycle;
};
setStarted(v) {
this.started = v;
this.setCycle(0);
this.onToggle?.(v);
}
start() {
async start() {
await this.beforeStart?.();
this.num_ticks_since_cps_change = 0;
this.num_cycles_at_cps_change = 0;
if (!this.pattern) {
throw new Error('Scheduler: no pattern set! call .setPattern first.');
}
@ -97,18 +119,16 @@ export class Cyclist {
this.lastEnd = 0;
this.setStarted(false);
}
setPattern(pat, autostart = false) {
async setPattern(pat, autostart = false) {
this.pattern = pat;
if (autostart && !this.started) {
this.start();
await this.start();
}
}
setCps(cps = 0.5) {
if (this.cps === cps) {
return;
}
const num_seconds_since_cps_change = this.num_ticks_since_cps_change * this.interval;
this.num_cycles_at_cps_change = this.num_cycles_at_cps_change + num_seconds_since_cps_change * cps;
this.cps = cps;
this.num_ticks_since_cps_change = 0;
}