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music track resampling

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This commit is contained in:
minjaesong
2023-12-11 03:35:03 +09:00
parent cc7f7b11d8
commit 949376b26a
6 changed files with 133 additions and 7 deletions
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13
src/net/torvald/terrarum/audio/AudioProcessBuf.kt
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@@ -1,6 +1,7 @@
package net.torvald.terrarum.audio
import com.jme3.math.FastMath
import net.torvald.terrarum.App.printdbg
import net.torvald.terrarum.audio.TerrarumAudioMixerTrack.Companion.BUFFER_SIZE
import net.torvald.terrarum.audio.TerrarumAudioMixerTrack.Companion.SAMPLING_RATE
import net.torvald.terrarum.ceilToInt
@@ -40,7 +41,7 @@ class AudioProcessBuf(inputSamplingRate: Int, val audioReadFun: (ByteArray) -> I
private val samplesIn = inputSamplingRate / gcd // 147 for 44100
private val samplesOut = SAMPLING_RATE / gcd // 160 for 48000
private val internalBufferSize = samplesOut * ((BS.toFloat()) / samplesIn).ceilToInt() // (512 / 160) -> 640 for 44100, 48000
private val internalBufferSize = if (doResample) (BS.toFloat() / samplesOut).ceilToInt().plus(1) * samplesOut else BS // (512 / 160) -> 640 for 44100, 48000
private fun resampleBlock(inn: FloatArray, out: FloatArray) {
@@ -75,7 +76,11 @@ class AudioProcessBuf(inputSamplingRate: Int, val audioReadFun: (ByteArray) -> I
try {
val bytesRead = audioReadFun(readBuf)
if (bytesRead == null || bytesRead <= 0) onAudioFinished()
if (bytesRead == null || bytesRead <= 0) {
printdbg(this, "Music finished; bytesRead = $bytesRead")
onAudioFinished()
}
else {
for(c in 0 until readCount) {
val sl = (getFromReadBuf(4 * c + 0, bytesRead) or getFromReadBuf(4 * c + 1, bytesRead).shl(8)).toShort()
@@ -119,6 +124,10 @@ class AudioProcessBuf(inputSamplingRate: Int, val audioReadFun: (ByteArray) -> I
// shift bytes in the fout
System.arraycopy(foutL, BS, foutL, 0, validSamplesInBuf - BS)
System.arraycopy(foutR, BS, foutR, 0, validSamplesInBuf - BS)
for (i in validSamplesInBuf until BS) {
foutL[i] = 0f
foutR[i] = 0f
}
// decrement necessary variables
validSamplesInBuf -= BS