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Small optimization

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This commit is contained in:
Ne_Eo
2024-10-16 01:00:17 +02:00
parent 72fcf18a59
commit 6696fd9755
1 changed files with 12 additions and 7 deletions
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source/funkin/backend/utils/AudioAnalyzer.hx
+12 -7
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@@ -21,16 +21,21 @@ class AudioAnalyzer {
}
public function analyze(startPos:Float, endPos:Float):Float {
var bytesStartPos:Int = Math.floor(startPos * __timeMulti / 4000 / buffer.bitsPerSample) * buffer.bitsPerSample;
var bytesEndPos:Int = Math.floor(endPos * __timeMulti / 4000 / buffer.bitsPerSample) * buffer.bitsPerSample;
var bitsPerSample = buffer.bitsPerSample;
var multi = __timeMulti / 4000 / bitsPerSample;
var bytesStartPos:Int = Math.floor(startPos * multi) * bitsPerSample;
var bytesEndPos:Int = Math.floor(endPos * multi) * bitsPerSample;
bytesStartPos -= bytesStartPos % buffer.bitsPerSample;
bytesEndPos -= bytesEndPos % buffer.bitsPerSample;
bytesStartPos -= bytesStartPos % bitsPerSample;
bytesEndPos -= bytesEndPos % bitsPerSample;
var dataBuffer = buffer.data.buffer;
var maxByte:Int = 0;
for(i in 0...Math.floor((bytesEndPos - bytesStartPos) / buffer.bitsPerSample)) {
var byte:Int = buffer.data.buffer.get(bytesStartPos + (i * buffer.bitsPerSample))
| (buffer.data.buffer.get(bytesStartPos + (i * buffer.bitsPerSample) + 1) << 8);
for(i in 0...Math.floor((bytesEndPos - bytesStartPos) / bitsPerSample)) {
var bytePos = bytesStartPos + (i * bitsPerSample);
// What if bitsPerSample is 8? or 32? or 64? -Ne_Eo
var byte:Int = dataBuffer.get(bytePos) | (dataBuffer.get(bytePos + 1) << 8);
if (byte > 256 * 128) byte -= 256 * 256;
if (maxByte < byte) maxByte = byte;
}