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FIX: Piano roll tab không xuất âm thanh qua mastering chain

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3dtours
2026-08-05 12:10:50 +07:00
parent cfc114b9d7
commit 55d3464b1e
5 changed files with 64 additions and 13 deletions
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app/static/js/services/soundfontPlayer.js
+16 -2
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@@ -191,17 +191,31 @@
var spn = _audioCtx.createScriptProcessor(spBufSz, 0, 2);
var lp = _fluidModule._malloc(spBufSz * 4);
var rp = _fluidModule._malloc(spBufSz * 4);
// Heap WASM có thể realloc khi load SoundFont lớn (SGM-V2.01
// ~300MB) → lp/rp DANGLE → đọc vùng nhớ đã free → NaN/garbage
// → master chain "state is bad" → CÂM + stuck. Theo dõi
// buffer + re-malloc khi đổi.
var _heapBufRef = _fluidModule.HEAPU8.buffer;
spn.onaudioprocess = function (e) {
var left = e.outputBuffer.getChannelData(0);
var right = e.outputBuffer.getChannelData(1);
var sz = left.length;
try {
if (_fluidModule.HEAPU8.buffer !== _heapBufRef) {
try { _fluidModule._free(lp); _fluidModule._free(rp); } catch (er2) {}
lp = _fluidModule._malloc(sz * 4);
rp = _fluidModule._malloc(sz * 4);
_heapBufRef = _fluidModule.HEAPU8.buffer;
}
_fluidModule._fluid_synth_write_float(_synthPtr, sz, lp, 0, 1, rp, 0, 1);
var hf = _fluidModule.HEAPF32;
var lpb = lp >> 2, rpb = rp >> 2;
for (var si = 0; si < sz; si++) {
left[si] = hf[lpb + si];
right[si] = hf[rpb + si];
// NaN sweep: mẫu NaN/Inf → 0 (chain biquad
// KHÔNG BAO GIỜ được nhận NaN → không state-bad).
var L = hf[lpb + si], R = hf[rpb + si];
left[si] = isFinite(L) ? L : 0;
right[si] = isFinite(R) ? R : 0;
}
} catch (er) {}
};