Merge pull request #1317 from daslyfe/jade/voicemax

feat: add max polyphony feature for superdough

packages/superdough/helpers.mjs

@@ -212,6 +212,7 @@ export function webAudioTimeout(audioContext, onComplete, startTime, stopTime) {
   constantNode.onended = () => {
     onComplete();
   };
+  return constantNode;
 }
 const mod = (freq, range = 1, type = 'sine') => {
   const ctx = getAudioContext();

packages/superdough/sampler.mjs

@@ -344,7 +344,9 @@ export async function onTriggerSample(t, value, onended, bank, resolveUrl) {
   };
   let envEnd = holdEnd + release + 0.01;
   bufferSource.stop(envEnd);
-  const stop = (endTime, playWholeBuffer) => {};
+  const stop = (endTime) => {
+    bufferSource.stop(endTime);
+  };
   const handle = { node: out, bufferSource, stop };
 
   // cut groups

packages/superdough/superdough.mjs

@@ -14,6 +14,11 @@ import { map } from 'nanostores';
 import { logger } from './logger.mjs';
 import { loadBuffer } from './sampler.mjs';
 
+export const DEFAULT_MAX_POLYPHONY = 128;
+let maxPolyphony = DEFAULT_MAX_POLYPHONY;
+export function setMaxPolyphony(polyphony) {
+  maxPolyphony = parseInt(polyphony) ?? DEFAULT_MAX_POLYPHONY;
+}
 export const soundMap = map();
 
 export function registerSound(key, onTrigger, data = {}) {
@@ -163,7 +168,8 @@ function loadWorklets() {
 
 // this function should be called on first user interaction (to avoid console warning)
 export async function initAudio(options = {}) {
-  const { disableWorklets = false } = options;
+  const { disableWorklets = false, maxPolyphony } = options;
+  setMaxPolyphony(maxPolyphony);
   if (typeof window === 'undefined') {
     return;
   }
@@ -375,6 +381,8 @@ export function resetGlobalEffects() {
   analysersData = {};
 }
 
+let activeSoundSources = new Map();
+
 export const superdough = async (value, t, hapDuration) => {
   const ac = getAudioContext();
   t = typeof t === 'string' && t.startsWith('=') ? Number(t.slice(1)) : ac.currentTime + t;
@@ -474,14 +482,24 @@ export const superdough = async (value, t, hapDuration) => {
 
   gain = nanFallback(gain, 1);
 
+  const chainID = Math.round(Math.random() * 1000000);
+
+  // oldest audio nodes will be destroyed if maximum polyphony is exceeded
+  for (let i = 0; i <= activeSoundSources.size - maxPolyphony; i++) {
+    const ch = activeSoundSources.entries().next();
+    const source = ch.value[1];
+    const chainID = ch.value[0];
+    const endTime = t + 0.25;
+    source?.node?.gain?.linearRampToValueAtTime(0, endTime);
+    source?.stop?.(endTime);
+    activeSoundSources.delete(chainID);
+  }
+
   //music programs/audio gear usually increments inputs/outputs from 1, so imitate that behavior
   channels = (Array.isArray(channels) ? channels : [channels]).map((ch) => ch - 1);
-
   gain *= velocity; // velocity currently only multiplies with gain. it might do other things in the future
-  let toDisconnect = []; // audio nodes that will be disconnected when the source has ended
-  const onended = () => {
-    toDisconnect.forEach((n) => n?.disconnect());
-  };
+  let audioNodes = [];
+
   if (bank && s) {
     s = `${bank}_${s}`;
     value.s = s;
@@ -493,10 +511,15 @@ export const superdough = async (value, t, hapDuration) => {
     sourceNode = source(t, value, hapDuration);
   } else if (getSound(s)) {
     const { onTrigger } = getSound(s);
-    const soundHandle = await onTrigger(t, value, onended);
+    const onEnded = () => {
+      audioNodes.forEach((n) => n?.disconnect());
+      activeSoundSources.delete(chainID);
+    };
+    const soundHandle = await onTrigger(t, value, onEnded);
+
     if (soundHandle) {
       sourceNode = soundHandle.node;
-      soundHandle.stop(t + hapDuration);
+      activeSoundSources.set(chainID, soundHandle);
     }
   } else {
     throw new Error(`sound ${s} not found! Is it loaded?`);
@@ -626,6 +649,7 @@ export const superdough = async (value, t, hapDuration) => {
   if (delay > 0 && delaytime > 0 && delayfeedback > 0) {
     const delyNode = getDelay(orbit, delaytime, delayfeedback, t);
     delaySend = effectSend(post, delyNode, delay);
+    audioNodes.push(delaySend);
   }
   // reverb
   let reverbSend;
@@ -643,6 +667,7 @@ export const superdough = async (value, t, hapDuration) => {
     }
     const reverbNode = getReverb(orbit, roomsize, roomfade, roomlp, roomdim, roomIR);
     reverbSend = effectSend(post, reverbNode, room);
+    audioNodes.push(reverbSend);
   }
 
   // analyser
@@ -650,14 +675,12 @@ export const superdough = async (value, t, hapDuration) => {
   if (analyze) {
     const analyserNode = getAnalyserById(analyze, 2 ** (fft + 5));
     analyserSend = effectSend(post, analyserNode, 1);
+    audioNodes.push(analyserSend);
   }
 
   // connect chain elements together
   chain.slice(1).reduce((last, current) => last.connect(current), chain[0]);
-
-  // toDisconnect = all the node that should be disconnected in onended callback
-  // this is crucial for performance
-  toDisconnect = chain.concat([delaySend, reverbSend, analyserSend]);
+  audioNodes = audioNodes.concat(chain);
 };
 
 export const superdoughTrigger = (t, hap, ct, cps) => {

packages/superdough/synth.mjs

@@ -25,6 +25,10 @@ const getFrequencyFromValue = (value) => {
 
   return Number(freq);
 };
+function destroyAudioWorkletNode(node) {
+  node.disconnect();
+  node.parameters.get('end')?.setValueAtTime(0, 0);
+}
 
 const waveforms = ['triangle', 'square', 'sawtooth', 'sine'];
 const noises = ['pink', 'white', 'brown', 'crackle'];
@@ -63,7 +67,9 @@ export function registerSynthSounds() {
         stop(envEnd);
         return {
           node,
-          stop: (releaseTime) => {},
+          stop: (endTime) => {
+            stop(endTime);
+          },
         };
       },
       { type: 'synth', prebake: true },
@@ -110,10 +116,12 @@ export function registerSynthSounds() {
       let envGain = gainNode(1);
       envGain = o.connect(envGain);
 
-      webAudioTimeout(
+      getParamADSR(envGain.gain, attack, decay, sustain, release, 0, 0.3 * gainAdjustment, begin, holdend, 'linear');
+
+      let timeoutNode = webAudioTimeout(
         ac,
         () => {
-          o.disconnect();
+          destroyAudioWorkletNode(o);
           envGain.disconnect();
           onended();
           fm?.stop();
@@ -123,11 +131,11 @@ export function registerSynthSounds() {
         end,
       );
 
-      getParamADSR(envGain.gain, attack, decay, sustain, release, 0, 0.3 * gainAdjustment, begin, holdend, 'linear');
-
       return {
         node: envGain,
-        stop: (time) => {},
+        stop: (time) => {
+          timeoutNode.stop(time);
+        },
       };
     },
     { prebake: true, type: 'synth' },
@@ -169,10 +177,12 @@ export function registerSynthSounds() {
       let envGain = gainNode(1);
       envGain = o.connect(envGain);
 
-      webAudioTimeout(
+      getParamADSR(envGain.gain, attack, decay, sustain, release, 0, 1, begin, holdend, 'linear');
+
+      let timeoutNode = webAudioTimeout(
         ac,
         () => {
-          o.disconnect();
+          destroyAudioWorkletNode(o);
           envGain.disconnect();
           onended();
           fm?.stop();
@@ -182,11 +192,11 @@ export function registerSynthSounds() {
         end,
       );
 
-      getParamADSR(envGain.gain, attack, decay, sustain, release, 0, 1, begin, holdend, 'linear');
-
       return {
         node: envGain,
-        stop: (time) => {},
+        stop: (time) => {
+          timeoutNode.stop(time);
+        },
       };
     },
     { prebake: true, type: 'synth' },
@@ -229,7 +239,9 @@ export function registerSynthSounds() {
         stop(envEnd);
         return {
           node,
-          stop: (releaseTime) => {},
+          stop: (endTime) => {
+            stop(endTime);
+          },
         };
       },
       { type: 'synth', prebake: true },

packages/superdough/worklets.mjs

@@ -710,6 +710,9 @@ class PulseOscillatorProcessor extends AudioWorkletProcessor {
   }
 
   process(inputs, outputs, params) {
+    if (this.disconnected) {
+      return false;
+    }
     if (currentTime <= params.begin[0]) {
       return true;
     }