add prepare() to superdough

packages/superdough/sampler.mjs

@@ -265,19 +265,28 @@ export const samples = async (sampleMap, baseUrl = sampleMap._base || '', option
   processSampleMap(
     sampleMap,
     (key, bank) =>
-      registerSound(key, (t, hapValue, onended) => onTriggerSample(t, hapValue, onended, bank), {
-        type: 'sample',
-        samples: bank,
-        baseUrl,
-        prebake,
-        tag,
-      }),
+      registerSound(
+        key,
+        (t, hapValue, onended) => onTriggerSample(t, hapValue, onended, bank),
+        {
+          type: 'sample',
+          samples: bank,
+          baseUrl,
+          prebake,
+          tag,
+        },
+        (hapValue) => onPrepareSample(hapValue, bank),
+      ),
     baseUrl,
   );
 };
 
 const cutGroups = [];
 
+export async function onPrepareSample(hapValue, bank, resolveUrl) {
+  await getSampleBuffer(hapValue, bank, resolveUrl);
+}
+
 export async function onTriggerSample(t, value, onended, bank, resolveUrl) {
   let {
     s,

packages/superdough/superdough.mjs

@@ -23,9 +23,10 @@ export function setMaxPolyphony(polyphony) {
 }
 export const soundMap = map();
 
-export function registerSound(key, onTrigger, data = {}) {
+export function registerSound(key, onTrigger, data = {}, onPrepare = (() => {})) {
   key = key.toLowerCase().replace(/\s+/g, '_');
-  soundMap.setKey(key, { onTrigger, data });
+  soundMap.setKey(key, { onTrigger, data, onPrepare });
+
 }
 
 function aliasBankMap(aliasMap) {
@@ -721,3 +722,15 @@ export const superdough = async (value, t, hapDuration) => {
 export const superdoughTrigger = (t, hap, ct, cps) => {
   superdough(hap, t - ct, hap.duration / cps, cps);
 };
+
+export const prepare = (value) => {
+  const {
+    onPrepare,
+  } = getSound(value.s);
+  if (onPrepare) {
+    if (value.bank && value.s) {
+      value.s = `${value.bank}_${value.s}`;
+    }
+    onPrepare(value);
+  }
+}