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Merge pull request #217 from tidalcycles/webdirt-feature-parity

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sampler features + fixes
This commit is contained in:
Felix Roos 2022-09-22 00:03:30 +02:00 committed by GitHub
commit 5e76bc3f2f
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1 changed files with 28 additions and 9 deletions
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37
packages/webaudio/webaudio.mjs
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@ -153,6 +153,8 @@ try {
console.warn('could not load AudioWorklet effects coarse, crush and shape', err);
}
const cutGroups = [];
Pattern.prototype.out = function () {
return this.onTrigger(async (t, hap, ct, cps) => {
const hapDuration = hap.duration / cps;
@ -187,6 +189,10 @@ Pattern.prototype.out = function () {
begin = 0,
end = 1,
vowel,
unit,
nudge = 0, // TODO: is this in seconds?
cut,
loop,
} = hap.value;
const { velocity = 1 } = hap.context;
gain *= velocity; // legacy fix for velocity
@ -254,15 +260,28 @@ Pattern.prototype.out = function () {
return;
}
bufferSource.playbackRate.value = Math.abs(speed) * bufferSource.playbackRate.value;
// TODO: nudge, unit, cut, loop
let duration = soundfont || clip ? hapDuration : bufferSource.buffer.duration;
// let duration = bufferSource.buffer.duration;
const offset = begin * duration;
duration = ((end - begin) * duration) / Math.abs(speed);
if (soundfont || clip) {
bufferSource.start(t, offset); // duration does not work here for some reason
} else {
bufferSource.start(t, offset, duration);
if (unit === 'c') {
// are there other units?
bufferSource.playbackRate.value = bufferSource.playbackRate.value * bufferSource.buffer.duration;
}
let duration = soundfont || clip ? hapDuration : bufferSource.buffer.duration / bufferSource.playbackRate.value;
// "The computation of the offset into the sound is performed using the sound buffer's natural sample rate,
// rather than the current playback rate, so even if the sound is playing at twice its normal speed,
// the midway point through a 10-second audio buffer is still 5."
const offset = begin * duration * bufferSource.playbackRate.value;
duration = (end - begin) * duration;
if (loop) {
bufferSource.loop = true;
bufferSource.loopStart = offset;
bufferSource.loopEnd = offset + duration;
duration = loop * duration;
}
t += nudge;
bufferSource.start(t, offset);
if (cut !== undefined) {
cutGroups[cut]?.stop(t); // fade out?
cutGroups[cut] = bufferSource;
}
chain.push(bufferSource);
if (soundfont || clip) {