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Little fix on AudioAnalyzer

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This commit is contained in:
Ralty
2025-07-13 23:58:14 +07:00
parent 17ffdcd6ef
commit a708c204e7
1 changed files with 24 additions and 29 deletions
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source/funkin/backend/utils/AudioAnalyzer.hx
+24 -29
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@@ -43,42 +43,34 @@ class AudioAnalyzer {
}
inline function __analyze(startPos:Float, endPos:Float, ?outSeperate:Array<Float>):Float {
var pos = Math.floor(startPos * __toBits), end = Math.floor(endPos * __toBits), buf = #if js buffer.data #else buffer.data.buffer #end;
var max = 0, b = 0, c = 0, useSeperate = outSeperate != null;
var pos = Math.floor(startPos * __toBits), end = Math.floor(endPos * __toBits), buf = buffer.data #if !js .buffer #end;
var max = 0, b = 0, w = 0, c = 0, useSeperate = outSeperate != null;
if (useSeperate) {
while (c < outSeperate.length) outSeperate[c++] *= __bitSize;
while (c++ < buffer.channels) outSeperate.push(0);
c = Math.floor((pos % (__wordSize * buffer.channels)) / __wordSize);
}
if (__wordSize == 1) { // 8-bit audio data is unsigned (0 is 128, 128 is 256, -128 is 0)
while (pos < end) {
if (max < (b = #if js buf[pos] #else buf.get(pos) #end - __bitSize)) max = b;
if (useSeperate) {
if (outSeperate[c] < b) outSeperate[c] = b;
if (++c > buffer.channels) c = 0;
}
pos++;
}
}
else {
pos -= pos % __wordSize;
end -= end % __wordSize;
var w = 0;
while (pos < end) {
pos -= pos % __wordSize;
end -= end % __wordSize;
while (pos < end) {
// 8-bit audio data is unsigned (0 is 128, 128 is 256, -128 is 0)
if (__wordSize == 1) b = #if js buf[pos] #else buf.get(pos) #end - __bitSize;
else {
while (w < buffer.bitsPerSample) {
b |= #if js buf[pos] #else buf.get(pos) #end << w;
w += 8;
pos++;
}
if (b > __bitSize) b -= __bitUnsignedSize;
if (max < b) max = b;
if (useSeperate) {
if (outSeperate[c] < b) outSeperate[c] = b;
if (++c > buffer.channels) c = 0;
}
w = b = 0;
}
if (max < b) max = b;
if (useSeperate) {
if (outSeperate[c] < b) outSeperate[c] = b;
if (++c > buffer.channels) c = 0;
}
w = b = 0;
}
return max / __bitSize;
@@ -113,7 +105,7 @@ class AudioAnalyzer {
if (useSeperate) {
while (c < outSeperate.length) outSeperate[c++] *= __bitSize;
while (c++ < buffer.channels) outSeperate.push(0);
c = Math.floor((pos % (__wordSize * buffer.channels)) / __wordSize);
c = 0;
}
while (n > 0) {
n -= (result = __vorbis.read(__buffer, 0, n < bufferSize ? n : bufferSize, isBigEndian, __wordSize, true));
@@ -122,12 +114,15 @@ class AudioAnalyzer {
else if (result <= 0) break;
while (pos < result) {
while (w < buffer.bitsPerSample) {
b |= #if js __buffer[pos] #else __buffer.get(pos) #end << w;
w += 8;
pos++;
if (__wordSize == 1) b = __buffer.get(pos) - __bitSize;
else {
while (w < buffer.bitsPerSample) {
b |= __buffer.get(pos) << w;
w += 8;
pos++;
}
if (b > __bitSize) b -= __bitUnsignedSize;
}
if (b > __bitSize) b -= __bitUnsignedSize;
if (max < b) max = b;
if (useSeperate) {
if (outSeperate[c] < b) outSeperate[c] = b;