Format
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Nikita
parent
428a4b3dd7
commit
4bdaf577c0
9 changed files with 360 additions and 318 deletions
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@ -5,7 +5,23 @@ This program is free software: you can redistribute it and/or modify it under th
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*/
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import * as strudel from '@strudel/core';
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import { superdough, getAudioContext, setLogger, doughTrigger, registerWorklet, setAudioContext, getSampleBufferSource, loadBuffer, getSampleInfo, getSound, initAudio, setSuperdoughAudioController, loadWorklets, setMaxPolyphony, setMultiChannelOrbits } from 'superdough';
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import {
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superdough,
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getAudioContext,
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setLogger,
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doughTrigger,
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registerWorklet,
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setAudioContext,
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getSampleBufferSource,
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loadBuffer,
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getSampleInfo,
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getSound,
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initAudio,
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setSuperdoughAudioController,
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loadWorklets,
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setMaxPolyphony,
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setMultiChannelOrbits,
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} from 'superdough';
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import './supradough.mjs';
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import { workletUrl } from 'supradough';
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import { SuperdoughAudioController } from 'superdough/superdoughoutput.mjs';
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@ -28,59 +44,63 @@ export const webaudioOutput = (hap, _deadline, hapDuration, cps, t) => {
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};
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export async function renderPatternAudio(pattern, cps, begin, end, sampleRate, downloadName = undefined) {
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const oldAudioCtx = getAudioContext()
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await oldAudioCtx.close()
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let audioContext = new OfflineAudioContext(2, (end - begin) / cps * sampleRate, sampleRate);
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setAudioContext(audioContext)
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let context = getAudioContext()
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setSuperdoughAudioController(new SuperdoughAudioController(context))
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setMaxPolyphony(1024)
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setMultiChannelOrbits(true)
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await loadWorklets()
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const oldAudioCtx = getAudioContext();
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await oldAudioCtx.close();
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let audioContext = new OfflineAudioContext(2, ((end - begin) / cps) * sampleRate, sampleRate);
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setAudioContext(audioContext);
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let context = getAudioContext();
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setSuperdoughAudioController(new SuperdoughAudioController(context));
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setMaxPolyphony(1024);
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setMultiChannelOrbits(true);
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await loadWorklets();
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logger('[webaudio] start rendering');
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let haps = pattern.queryArc(begin, end, { _cps: cps })
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Promise.all(haps.map(async h => {
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let s;
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if (h.value.s) {
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if (h.value.bank) {
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s = `${h.value.bank}_${h.value.s}`;
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let haps = pattern.queryArc(begin, end, { _cps: cps });
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Promise.all(
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haps.map(async (h) => {
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let s;
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if (h.value.s) {
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if (h.value.bank) {
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s = `${h.value.bank}_${h.value.s}`;
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} else {
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s = h.value.s;
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}
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let bank = getSound(s).data.samples;
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if (bank) {
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let { url: sampleUrl, label } = getSampleInfo(h.value, bank);
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await loadBuffer(sampleUrl, context, label);
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}
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}
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else {
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s = h.value.s
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}
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let bank = getSound(s).data.samples
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if (bank) {
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let { url: sampleUrl, label } = getSampleInfo(h.value, bank);
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await loadBuffer(sampleUrl, context, label)
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}
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}
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}))
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}),
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);
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haps.forEach(async (hap) => {
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if (hap.hasOnset()) {
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hap.ensureObjectValue();
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await superdough(hap.value, hap.whole.begin.valueOf() / cps, hap.duration, cps, hap.whole?.begin.valueOf());
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}
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})
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return context.startRendering().then((renderedBuffer) => {
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console.log(renderedBuffer)
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const wavBuffer = audioBufferToWav(renderedBuffer);
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const blob = new Blob([wavBuffer], { type: 'audio/wav' });
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const url = URL.createObjectURL(blob);
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const a = document.createElement('a');
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a.href = url;
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downloadName = downloadName ? `${downloadName}.wav` : `${new Date().toISOString()}.wav`;
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a.download = `${downloadName}`;
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document.body.appendChild(a);
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a.click();
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document.body.removeChild(a);
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URL.revokeObjectURL(url);
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}).finally(async () => {
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setAudioContext(null)
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setSuperdoughAudioController(null)
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await initAudio()
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});
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return context
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.startRendering()
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.then((renderedBuffer) => {
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console.log(renderedBuffer);
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const wavBuffer = audioBufferToWav(renderedBuffer);
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const blob = new Blob([wavBuffer], { type: 'audio/wav' });
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const url = URL.createObjectURL(blob);
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const a = document.createElement('a');
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a.href = url;
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downloadName = downloadName ? `${downloadName}.wav` : `${new Date().toISOString()}.wav`;
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a.download = `${downloadName}`;
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document.body.appendChild(a);
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a.click();
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document.body.removeChild(a);
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URL.revokeObjectURL(url);
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})
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.finally(async () => {
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setAudioContext(null);
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setSuperdoughAudioController(null);
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await initAudio();
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});
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}
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export function webaudioRepl(options = {}) {
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@ -96,97 +116,97 @@ Pattern.prototype.dough = function () {
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return this.onTrigger(doughTrigger, 1);
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};
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function audioBufferToWav(buffer, opt) {
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opt = opt || {}
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opt = opt || {};
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var numChannels = buffer.numberOfChannels
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var sampleRate = buffer.sampleRate
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var format = opt.float32 ? 3 : 1
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var bitDepth = format === 3 ? 32 : 16
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var numChannels = buffer.numberOfChannels;
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var sampleRate = buffer.sampleRate;
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var format = opt.float32 ? 3 : 1;
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var bitDepth = format === 3 ? 32 : 16;
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var result
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var result;
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if (numChannels === 2) {
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result = interleave(buffer.getChannelData(0), buffer.getChannelData(1))
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result = interleave(buffer.getChannelData(0), buffer.getChannelData(1));
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} else {
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result = buffer.getChannelData(0)
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result = buffer.getChannelData(0);
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}
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return encodeWAV(result, format, sampleRate, numChannels, bitDepth)
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return encodeWAV(result, format, sampleRate, numChannels, bitDepth);
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}
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function encodeWAV(samples, format, sampleRate, numChannels, bitDepth) {
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var bytesPerSample = bitDepth / 8
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var blockAlign = numChannels * bytesPerSample
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var bytesPerSample = bitDepth / 8;
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var blockAlign = numChannels * bytesPerSample;
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var buffer = new ArrayBuffer(44 + samples.length * bytesPerSample)
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var view = new DataView(buffer)
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var buffer = new ArrayBuffer(44 + samples.length * bytesPerSample);
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var view = new DataView(buffer);
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/* RIFF identifier */
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writeString(view, 0, 'RIFF')
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writeString(view, 0, 'RIFF');
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/* RIFF chunk length */
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view.setUint32(4, 36 + samples.length * bytesPerSample, true)
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view.setUint32(4, 36 + samples.length * bytesPerSample, true);
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/* RIFF type */
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writeString(view, 8, 'WAVE')
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writeString(view, 8, 'WAVE');
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/* format chunk identifier */
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writeString(view, 12, 'fmt ')
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writeString(view, 12, 'fmt ');
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/* format chunk length */
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view.setUint32(16, 16, true)
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view.setUint32(16, 16, true);
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/* sample format (raw) */
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view.setUint16(20, format, true)
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view.setUint16(20, format, true);
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/* channel count */
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view.setUint16(22, numChannels, true)
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view.setUint16(22, numChannels, true);
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/* sample rate */
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view.setUint32(24, sampleRate, true)
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view.setUint32(24, sampleRate, true);
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/* byte rate (sample rate * block align) */
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view.setUint32(28, sampleRate * blockAlign, true)
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view.setUint32(28, sampleRate * blockAlign, true);
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/* block align (channel count * bytes per sample) */
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view.setUint16(32, blockAlign, true)
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view.setUint16(32, blockAlign, true);
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/* bits per sample */
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view.setUint16(34, bitDepth, true)
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view.setUint16(34, bitDepth, true);
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/* data chunk identifier */
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writeString(view, 36, 'data')
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writeString(view, 36, 'data');
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/* data chunk length */
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view.setUint32(40, samples.length * bytesPerSample, true)
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if (format === 1) { // Raw PCM
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floatTo16BitPCM(view, 44, samples)
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view.setUint32(40, samples.length * bytesPerSample, true);
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if (format === 1) {
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// Raw PCM
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floatTo16BitPCM(view, 44, samples);
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} else {
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writeFloat32(view, 44, samples)
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writeFloat32(view, 44, samples);
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}
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return buffer
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return buffer;
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}
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function interleave(inputL, inputR) {
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var length = inputL.length + inputR.length
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var result = new Float32Array(length)
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var length = inputL.length + inputR.length;
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var result = new Float32Array(length);
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var index = 0
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var inputIndex = 0
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var index = 0;
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var inputIndex = 0;
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while (index < length) {
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result[index++] = inputL[inputIndex]
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result[index++] = inputR[inputIndex]
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inputIndex++
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result[index++] = inputL[inputIndex];
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result[index++] = inputR[inputIndex];
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inputIndex++;
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}
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return result
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return result;
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}
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function writeFloat32(output, offset, input) {
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for (var i = 0; i < input.length; i++, offset += 4) {
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output.setFloat32(offset, input[i], true)
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output.setFloat32(offset, input[i], true);
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}
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}
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function floatTo16BitPCM(output, offset, input) {
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for (var i = 0; i < input.length; i++, offset += 2) {
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var s = Math.max(-1, Math.min(1, input[i]))
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output.setInt16(offset, s < 0 ? s * 0x8000 : s * 0x7FFF, true)
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var s = Math.max(-1, Math.min(1, input[i]));
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output.setInt16(offset, s < 0 ? s * 0x8000 : s * 0x7fff, true);
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}
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}
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function writeString(view, offset, string) {
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for (var i = 0; i < string.length; i++) {
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view.setUint8(offset + i, string.charCodeAt(i))
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view.setUint8(offset + i, string.charCodeAt(i));
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}
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}
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}
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