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add tests

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This commit is contained in:
Jade (Rose) Rowland 2025-08-17 17:21:36 -04:00
parent e9aef9e4d4
commit e7e636886d
4 changed files with 90 additions and 13 deletions
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8
packages/superdough/reverb.mjs
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@ -1,8 +1,9 @@
import reverbGen from './reverbGen.mjs';
import { clamp } from './util.mjs';
if (typeof AudioContext !== 'undefined') {
AudioContext.prototype.adjustLength = function (duration, buffer, speed = 1, offsetSeconds = 0) {
const offset = offsetSeconds * buffer.sampleRate;
AudioContext.prototype.adjustLength = function (duration, buffer, speed = 1, offsetAmount = 0) {
const sampleOffset = Math.floor(clamp(offsetAmount, 0, 1) * buffer.length);
const newLength = buffer.sampleRate * duration;
const newBuffer = this.createBuffer(buffer.numberOfChannels, buffer.length, buffer.sampleRate);
for (let channel = 0; channel < buffer.numberOfChannels; channel++) {
@ -10,7 +11,8 @@ if (typeof AudioContext !== 'undefined') {
let newData = newBuffer.getChannelData(channel);
for (let i = 0; i < newLength; i++) {
let position = (offset + i * Math.abs(speed)) % oldData.length;
// loop the buffer around to prevent
let position = (sampleOffset + i * Math.abs(speed)) % oldData.length;
if (speed < 1) {
position = position * -1;
}