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more binopanning

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This commit is contained in:
minjaesong
2024-01-12 16:58:48 +09:00
parent 3d71b5c619
commit 236d4e4e53
1 changed files with 11 additions and 3 deletions
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14
src/net/torvald/terrarum/audio/dsp/BinoPan.kt
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@@ -18,6 +18,7 @@ import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.toIntAndFrac
import net.torvald.terrarum.ui.Toolkit
import kotlin.math.absoluteValue
import kotlin.math.roundToInt
import kotlin.math.tanh
/**
* @param pan -1 for far-left, 0 for centre, 1 for far-right
@@ -56,12 +57,19 @@ class BinoPan(var pan: Float, var earDist: Float = EARDIST_DEFAULT): TerrarumAud
private val HALF_PI = (Math.PI / 2.0).toFloat()
}
/**
* @param intensity -2 to 2
*/
private fun panningFieldMap(intensity: Float): Float {
return tanh(intensity)
}
/**
* @param angleOffset must be smaller than ±90 deg
*/
private fun thru(sym: String, angleOffset: Float, inbuf: FloatArray, sumbuf: Array<FloatArray>, delayLine: FloatArray) {
val pan = (pan + angleOffset / (90f - angleOffset.absoluteValue)).coerceIn(-1f, 1f)
val pan = panningFieldMap(pan + angleOffset / 90f)
val timeDiffMax = earDist.coerceAtMost(EARDIST_MAX) / AudioMixer.SPEED_OF_SOUND * SAMPLING_RATEF
val angle = pan * HALF_PI
@@ -97,8 +105,8 @@ class BinoPan(var pan: Float, var earDist: Float = EARDIST_DEFAULT): TerrarumAud
// printdbg(this, "$sym\tpan=$pan, mults=${mults[L]}\t${mults[R]}")
}
override fun thru(inbuf: List<FloatArray>, outbuf: List<FloatArray>) {
thru("L", -30f, inbuf[L], outLs, delayLineL)
thru("R", +30f, inbuf[R], outRs, delayLineR)
thru("L", -60f, inbuf[L], outLs, delayLineL)
thru("R", +60f, inbuf[R], outRs, delayLineR)
for (i in 0 until AUDIO_BUFFER_SIZE) {
val outL = (outLs[L][i] + outRs[L][i]) / 2f