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why the hell I thought circular buffering would be better, when it makes FOUR memcpy insead of TWO

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This commit is contained in:
minjaesong
2025-07-04 06:13:04 +09:00
parent f11ea557be
commit c803ddfae8
2 changed files with 0 additions and 21 deletions
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9
src/net/torvald/terrarum/audio/FFT.kt
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@@ -96,20 +96,11 @@ object FFT: Disposable {
return ComplexArray(signal) return ComplexArray(signal)
} }
fun fft(signal0: ComplexArray) {
ffts[signal0.size]!!.complexForward(signal0.reim)
}
fun fftInto(signal0: ComplexArray, out: ComplexArray) { fun fftInto(signal0: ComplexArray, out: ComplexArray) {
System.arraycopy(signal0.reim, 0, out.reim, 0, signal0.reim.size) System.arraycopy(signal0.reim, 0, out.reim, 0, signal0.reim.size)
ffts[signal0.size]!!.complexForward(out.reim) ffts[signal0.size]!!.complexForward(out.reim)
} }
fun ifftAndGetReal(signal0: ComplexArray): FloatArray {
ffts[signal0.size]!!.complexInverse(signal0.reim, true)
return signal0.getReal()
}
fun ifftAndGetReal(signal0: ComplexArray, output: FloatArray) { fun ifftAndGetReal(signal0: ComplexArray, output: FloatArray) {
ffts[signal0.size]!!.complexInverse(signal0.reim, true) ffts[signal0.size]!!.complexInverse(signal0.reim, true)
for (i in 0 until signal0.size) { for (i in 0 until signal0.size) {

12
src/net/torvald/terrarum/audio/dsp/Convolv.kt
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@@ -93,18 +93,6 @@ class Convolv(irModule: String, irPath: String, val crossfeed: Float, gain: Floa
} }
} }
private var bufferIndex = 0
private fun pushSumCircular(gain: Float, sampleL: FloatArray, sampleR: FloatArray, sumbuf: Array<ComplexArray>) {
val baseIdx = bufferIndex * 2
for (i in sampleL.indices) {
sumbuf[0].reim[baseIdx + i * 2] = (sampleL[i] + sampleR[i] * crossfeed) * gain
sumbuf[0].reim[baseIdx + i * 2 + 1] = 0f
sumbuf[1].reim[baseIdx + i * 2] = (sampleL[i] * crossfeed + sampleR[i]) * gain
sumbuf[1].reim[baseIdx + i * 2 + 1] = 0f
}
bufferIndex = (bufferIndex + sampleL.size) % (fftLen - sampleL.size)
}
override fun drawDebugView(batch: SpriteBatch, x: Int, y: Int) { override fun drawDebugView(batch: SpriteBatch, x: Int, y: Int) {
// processing speed bar // processing speed bar
val w = processingSpeed val w = processingSpeed