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Add back mipmaps; add caching

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This commit is contained in:
Aria 2025-09-30 23:08:28 -05:00
parent bad498a1e5
commit a2b8407fbb
2 changed files with 56 additions and 22 deletions
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33
packages/superdough/wavetable.mjs
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@ -38,21 +38,25 @@ export const Warpmode = Object.freeze({
FLIP: 21,
});
async function loadWavetableFrames(url, label, frameLen = 2048) {
const buf = await loadBuffer(url, label);
const ch0 = buf.getChannelData(0);
const total = ch0.length;
const numFrames = Math.max(1, Math.floor(total / frameLen));
const frames = new Array(numFrames);
for (let i = 0; i < numFrames; i++) {
const start = i * frameLen;
frames[i] = ch0.subarray(start, start + frameLen);
const seenKeys = new Set();
async function getPayload(url, label, frameLen = 2048) {
const key = `${url},${frameLen}`;
if (!seenKeys.has(key)) {
const buf = await loadBuffer(url, label);
const ch0 = buf.getChannelData(0);
const total = ch0.length;
const numFrames = Math.max(1, Math.floor(total / frameLen));
const frames = new Array(numFrames);
for (let i = 0; i < numFrames; i++) {
const start = i * frameLen;
frames[i] = ch0.subarray(start, start + frameLen);
}
seenKeys.add(key);
return { frames, frameLen, numFrames, key };
}
return { frames, frameLen, numFrames };
return { frameLen, key }; // worklet will use the cached version
}
const loadCache = {};
function humanFileSize(bytes, si) {
var thresh = si ? 1000 : 1024;
if (bytes < thresh) return bytes + ' B';
@ -97,6 +101,7 @@ async function decodeAtNativeRate(arr) {
return await tempAC.decodeAudioData(arr);
}
const loadCache = {};
const loadBuffer = (url, label) => {
url = url.replace('#', '%23');
if (!loadCache[url]) {
@ -211,7 +216,7 @@ export async function onTriggerSynth(t, value, onended, tables, cps, frameLen) {
}
const frequency = getFrequencyFromValue(value);
const { url, label } = getCommonSampleInfo(value, tables);
const payload = await loadWavetableFrames(url, label, frameLen);
const payload = await getPayload(url, label, frameLen);
let holdEnd = t + duration;
if (clip !== undefined) {
holdEnd = Math.min(t + clip * duration, holdEnd);
@ -305,7 +310,7 @@ export async function onTriggerSynth(t, value, onended, tables, cps, frameLen) {
const vibratoOscillator = getVibratoOscillator(source.parameters.get('detune'), value, t);
const envGain = ac.createGain();
const node = source.connect(envGain);
getParamADSR(node.gain, attack, decay, sustain, release, 0, 1, t, holdEnd, 'linear');
getParamADSR(node.gain, attack, decay, sustain, release, 0, 0.3, t, holdEnd, 'linear');
getPitchEnvelope(source.parameters.get('detune'), value, t, holdEnd);
const handle = { node, source };
const timeoutNode = webAudioTimeout(