diff --git a/src/net/torvald/terrarum/audio/AudioProcessBuf.kt b/src/net/torvald/terrarum/audio/AudioProcessBuf.kt index ee370a989..f808f63e4 100644 --- a/src/net/torvald/terrarum/audio/AudioProcessBuf.kt +++ b/src/net/torvald/terrarum/audio/AudioProcessBuf.kt @@ -1,7 +1,6 @@ package net.torvald.terrarum.audio import com.jme3.math.FastMath -import net.torvald.terrarum.App.printdbg import net.torvald.terrarum.audio.TerrarumAudioMixerTrack.Companion.AUDIO_BUFFER_SIZE import net.torvald.terrarum.audio.TerrarumAudioMixerTrack.Companion.SAMPLING_RATE import net.torvald.terrarum.ceilToInt @@ -10,7 +9,6 @@ import net.torvald.terrarum.serialise.toUint import org.dyn4j.Epsilon import kotlin.math.PI import kotlin.math.absoluteValue -import kotlin.math.roundToInt import kotlin.math.sin private data class Frac(var nom: Int, val denom: Int) { @@ -32,7 +30,7 @@ class AudioProcessBuf(inputSamplingRate: Int, val audioReadFun: (ByteArray) -> I companion object { private val epsilon: Double = Epsilon.E - private val TAPS = 8 // 2*a tap lanczos intp. Lower = greater artefacts + private val TAPS = 4 // 2*a tap lanczos intp. Lower = greater artefacts fun L(x: Double): Double = if (x.absoluteValue < epsilon) 1.0 @@ -49,11 +47,11 @@ class AudioProcessBuf(inputSamplingRate: Int, val audioReadFun: (ByteArray) -> I init { val bl = arrayOf( - 1152,1380,1815,1792,2304,2634,3500,3456,4608,5141,6870,6912, - 1280,1505,1943,1920,2304,2759,3630,3584,4608,5267,7000,6912, - 1536,1756,2198,2176,2560,3010,3886,3840,4608,5518,7260,7168, - 2048,2257,2709,2688,3072,3511,4397,4352,5120,6019,7772,7680, - 4096,4513,5419,5376,6144,7022,8794,8704,10240,12038,15544,15360 + 1152,1380,1814,1792,2304,2634,3502,3456,4608,5141,6874,6912, + 1280,1508,1942,1920,2304,2762,3630,3584,4608,5267,7004,6912, + 1536,1764,2198,2176,2560,3018,3886,3840,4608,5519,7260,7168, + 2048,2276,2710,2688,3072,3530,4398,4352,5120,6023,7772,7680, + 4096,4554,5421,5376,6144,7056,8796,8704,10240,12078,15544,15360 ) arrayOf(48000,44100,32768,32000,24000,22050,16384,16000,12000,11025,8192,8000).forEachIndexed { ri, r -> @@ -75,28 +73,26 @@ class AudioProcessBuf(inputSamplingRate: Int, val audioReadFun: (ByteArray) -> I private val PADSIZE = TAPS + 1 private fun resampleBlock(innL: FloatArray, innR: FloatArray, outL: FloatArray, outR: FloatArray, outSampleCount: Int) { - fun getInnL(i: Int) = innL[i + PADSIZE] - fun getInnR(i: Int) = innR[i + PADSIZE] - for (sampleIdx in 0 until outSampleCount) { - val x = fPhaseL.toDouble() + q * sampleIdx - var sx = 0.0 - for (i in x.floorToInt() - TAPS + 1..x.floorToInt() + TAPS) { - sx += getInnL(i) * L(x - i) - } - outL[sampleIdx] = sx.toFloat() - } - fPhaseL.nom = ((fPhaseL.toDouble() + q * outSampleCount) * denom).roundToInt() % denom + val t = sampleIdx.toDouble() * q + val leftBound = maxOf(0, (t - TAPS + 1).floorToInt()) + val rightBound = minOf(innL.size - 1, (t + TAPS).ceilToInt()) - for (sampleIdx in 0 until outSampleCount) { - val x = fPhaseR.toDouble() + q * sampleIdx - var sx = 0.0 - for (i in x.floorToInt() - TAPS + 1..x.floorToInt() + TAPS) { - sx += getInnR(i) * L(x - i) + + var akkuL = 0.0 + var akkuR = 0.0 + var weightedSum = 0.0 + + for (j in leftBound..rightBound) { + val w = L(t - j.toDouble()) + akkuL += innL[j] * w + akkuR += innR[j] * w + weightedSum += w } - outR[sampleIdx] = sx.toFloat() + + outL[sampleIdx] = (akkuL / weightedSum).toFloat() + outR[sampleIdx] = (akkuR / weightedSum).toFloat() } - fPhaseR.nom = ((fPhaseR.toDouble() + q * outSampleCount) * denom).roundToInt() % denom } var validSamplesInBuf = 0 @@ -110,8 +106,6 @@ class AudioProcessBuf(inputSamplingRate: Int, val audioReadFun: (ByteArray) -> I private val finL = FloatArray(fetchSize + 2 * PADSIZE) private val finR = FloatArray(fetchSize + 2 * PADSIZE) - private var fPhaseL = Frac(preDelay, denom) - private var fPhaseR = Frac(preDelay, denom) private val fmidL = FloatArray((fetchSize / q + 1.0).toInt()) private val fmidR = FloatArray((fetchSize / q + 1.0).toInt()) private val foutL = FloatArray(internalBufferSize) // 640 for (44100, 48000), 512 for (48000, 48000) with BUFFER_SIZE = 512 * 4 @@ -125,7 +119,7 @@ class AudioProcessBuf(inputSamplingRate: Int, val audioReadFun: (ByteArray) -> I fun fetchBytes() { val readCount = if (validSamplesInBuf < BS) fetchSize else 0 - val writeCount = (readCount / q + fPhaseL.toDouble()).toInt() + val writeCount = (readCount / q).toInt() fun getFromReadBuf(i: Int, bytesRead: Int) = if (i < bytesRead) readBuf[i].toUint() else 0