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fix: audio crackles on buffer-edge

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minjaesong
2023-11-20 03:20:45 +09:00
parent 468476f41e
commit 224c0f7863
1 changed files with 3 additions and 4 deletions
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7
src/net/torvald/terrarum/audio/TerrarumAudioFilter.kt
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@@ -50,13 +50,12 @@ class Lowpass(cutoff0: Float, val rate: Int): TerrarumAudioFilter() {
} }
override fun thru(inbuf0: List<FloatArray>, inbuf1: List<FloatArray>, outbuf0: List<FloatArray>, outbuf1: List<FloatArray>) { override fun thru(inbuf0: List<FloatArray>, inbuf1: List<FloatArray>, outbuf0: List<FloatArray>, outbuf1: List<FloatArray>) {
// fixme crackles on buffer-edge
for (ch in outbuf1.indices) { for (ch in outbuf1.indices) {
val out = outbuf1[ch] val out = outbuf1[ch]
val inn = inbuf1[ch] val inn = inbuf1[ch]
out[0] = outbuf0[ch].last() out[0] = outbuf0[ch].last() + alpha * (inn[0] - outbuf0[ch].last())
for (i in 1 until outbuf1[ch].size) { for (i in 1 until outbuf1[ch].size) {
out[i] = out[i-1] + alpha * (inn[i] - out[i-1]) out[i] = out[i-1] + alpha * (inn[i] - out[i-1])
} }
@@ -96,7 +95,7 @@ class Highpass(cutoff0: Float, val rate: Int): TerrarumAudioFilter() {
val out = outbuf1[ch] val out = outbuf1[ch]
val inn = inbuf1[ch] val inn = inbuf1[ch]
out[0] = outbuf0[ch].last() out[0] = alpha * (outbuf0[ch].last() + inn[0] - inbuf0[ch].last())
for (i in 1 until outbuf1[ch].size) { for (i in 1 until outbuf1[ch].size) {
out[i] = alpha * (out[i-1] + inn[i] - inn[i-1]) out[i] = alpha * (out[i-1] + inn[i] - inn[i-1])