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simplify modulators

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This commit is contained in:
Jade (Rose) Rowland 2025-09-28 14:57:12 -04:00
parent 23d4bfa9d9
commit c689874bb4
2 changed files with 78 additions and 41 deletions
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35
packages/superdough/helpers.mjs
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@ -153,6 +153,41 @@ export const getADSRValues = (params, curve = 'linear', defaultValues) => {
return [Math.max(a ?? 0, envmin), Math.max(d ?? 0, envmin), Math.min(sustain, envmax), Math.max(r ?? 0, releaseMin)];
};
// helper utility for applying standard modulators to a parameter
export function applyParameterModulators(audioContext, param, start, end, envelopeValues, lfoValues) {
let { amount,offset,defaultAmount = 1, curve = 'linear', values, holdEnd, defaultValues } = envelopeValues;
if (amount == null) {
const hasADSRParams = values.some(p => p != null);
amount = hasADSRParams ? defaultAmount : 0;
}
const min = offset ?? 0;
const max = amount + min
const diff = Math.abs(max - min)
if (diff) {
const [attack, decay, sustain, release] = getADSRValues(values, curve, defaultValues);
getParamADSR(param, attack, decay, sustain, release, min, max, start, holdEnd, curve);
}
let lfo
let {defaultDepth = 1,depth, dcoffset, ...getLfoInputs} = lfoValues
if (depth == null) {
const hasLFOParams = Object.values(getLfoInputs).some(v => v != null)
depth = hasLFOParams ? defaultDepth : 0;
}
if (depth) {
lfo = getLfo(audioContext, start, end, {
depth,
dcoffset,
...getLfoInputs
});
lfo.connect(param);
}
return { lfo, disconnect: () => lfo?.disconnect() }
}
export function createFilter(context, type, frequency, Q, att, dec, sus, rel, fenv, start, end, fanchor, model, drive) {
const curve = 'exponential';
const [attack, decay, sustain, release] = getADSRValues([att, dec, sus, rel], curve, [0.005, 0.14, 0, 0.1]);