reloading the engine will copy track states from the old instance, obsoleting audioMixerRenewHooks

src/net/torvald/terrarum/audio/dsp/BinoPan.kt

@@ -140,4 +140,11 @@ class BinoPan(var pan: Float, var earDist: Float = EARDIST_DEFAULT): TerrarumAud
     }
 
     override val debugViewHeight = 32
+
+    override fun copyParamsFrom(other: TerrarumAudioFilter) {
+        if (other is BinoPan) {
+            this.pan = other.pan
+            this.earDist = other.earDist
+        }
+    }
 }

src/net/torvald/terrarum/audio/dsp/Bitcrush.kt

@@ -35,4 +35,11 @@ class Bitcrush(var steps: Int, var inputGain: Float = 1f): TerrarumAudioFilter()
     }
 
     override val debugViewHeight = 16
+
+    override fun copyParamsFrom(other: TerrarumAudioFilter) {
+        if (other is Bitcrush) {
+            this.steps = other.steps
+            this.inputGain = other.inputGain
+        }
+    }
 }

src/net/torvald/terrarum/audio/dsp/Buffer.kt

@@ -19,4 +19,7 @@ object Buffer : TerrarumAudioFilter() {
     }
 
     override val debugViewHeight = 16
+
+    override fun copyParamsFrom(other: TerrarumAudioFilter) {
+    }
 }

src/net/torvald/terrarum/audio/dsp/Convolv.kt

@@ -155,4 +155,7 @@ class Convolv(ir: File, val crossfeed: Float, gain: Float = 1f / 256f): Terrarum
     }
 
     override val debugViewHeight = 32
+
+    override fun copyParamsFrom(other: TerrarumAudioFilter) {
+    }
 }

src/net/torvald/terrarum/audio/dsp/Gain.kt

@@ -20,4 +20,10 @@ class Gain(var gain: Float): TerrarumAudioFilter() {
     }
 
     override val debugViewHeight = 16
+
+    override fun copyParamsFrom(other: TerrarumAudioFilter) {
+        if (other is Gain) {
+            this.gain = other.gain
+        }
+    }
 }

src/net/torvald/terrarum/audio/dsp/Highpass.kt

@@ -67,4 +67,10 @@ class Highpass(cutoff0: Float): TerrarumAudioFilter() {
     }
 
     override val debugViewHeight = 16
+
+    override fun copyParamsFrom(other: TerrarumAudioFilter) {
+        if (other is Highpass) {
+            setCutoff(other.cutoff)
+        }
+    }
 }

src/net/torvald/terrarum/audio/dsp/Lowpass.kt

@@ -67,4 +67,10 @@ class Lowpass(cutoff0: Float): TerrarumAudioFilter() {
     }
 
     override val debugViewHeight = 16
+
+    override fun copyParamsFrom(other: TerrarumAudioFilter) {
+        if (other is Lowpass) {
+            setCutoff(other.cutoff)
+        }
+    }
 }

src/net/torvald/terrarum/audio/dsp/NullFilter.kt

@@ -13,4 +13,7 @@ object NullFilter : TerrarumAudioFilter() {
     }
 
     override val debugViewHeight = 0
+
+    override fun copyParamsFrom(other: TerrarumAudioFilter) {
+    }
 }

src/net/torvald/terrarum/audio/dsp/Reverb.kt

@@ -53,4 +53,7 @@ class Reverb(val delayMS: Float = 36f, var feedback: Float = 0.92f, var lowpass:
     }
 
     override val debugViewHeight = 0
+
+    override fun copyParamsFrom(other: TerrarumAudioFilter) {
+    }
 }

src/net/torvald/terrarum/audio/dsp/SoftClp.kt

@@ -56,4 +56,7 @@ object SoftClp : TerrarumAudioFilter() {
     }
 
     override val debugViewHeight = 0
+
+    override fun copyParamsFrom(other: TerrarumAudioFilter) {
+    }
 }

src/net/torvald/terrarum/audio/dsp/Spectro.kt

@@ -11,7 +11,7 @@ import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.STRIP_W
 import net.torvald.terrarum.ui.Toolkit
 import kotlin.math.*
 
-class Spectro(val gain: Float = 1f) : TerrarumAudioFilter() {
+class Spectro(var gain: Float = 1f) : TerrarumAudioFilter() {
     private val FFTSIZE = 1024
     private val inBuf = Array(2) { FloatArray(FFTSIZE) }
 
@@ -91,10 +91,16 @@ class Spectro(val gain: Float = 1f) : TerrarumAudioFilter() {
     }
 
     override val debugViewHeight = STRIP_W
+
+    override fun copyParamsFrom(other: TerrarumAudioFilter) {
+        if (other is Spectro) {
+            this.gain = other.gain
+        }
+    }
 }
 
 
-class Vecto(val gain: Float = 1f) : TerrarumAudioFilter() {
+class Vecto(var gain: Float = 1f) : TerrarumAudioFilter() {
     var backbufL = Array((6144f / App.audioBufferSize).roundToInt().coerceAtLeast(1)) {
         FloatArray(App.audioBufferSize)
     }
@@ -154,4 +160,10 @@ class Vecto(val gain: Float = 1f) : TerrarumAudioFilter() {
     }
 
     override val debugViewHeight = STRIP_W
+
+    override fun copyParamsFrom(other: TerrarumAudioFilter) {
+        if (other is Vecto) {
+            this.gain = other.gain
+        }
+    }
 }

src/net/torvald/terrarum/audio/dsp/TerrarumAudioFilter.kt

@@ -15,6 +15,7 @@ abstract class TerrarumAudioFilter {
     }
     abstract fun drawDebugView(batch: SpriteBatch, x: Int, y: Int)
     abstract val debugViewHeight: Int
+    abstract fun copyParamsFrom(other: TerrarumAudioFilter)
 }
 
 fun FloatArray.applyGain(gain: Float = 1f) = this.map { it * gain }.toFloatArray()

src/net/torvald/terrarum/audio/dsp/XYtoMS.kt

@@ -19,6 +19,9 @@ object XYtoMS: TerrarumAudioFilter() {
     }
 
     override val debugViewHeight = 0
+
+    override fun copyParamsFrom(other: TerrarumAudioFilter) {
+    }
 }
 
 object MStoXY: TerrarumAudioFilter() {
@@ -37,4 +40,7 @@ object MStoXY: TerrarumAudioFilter() {
     }
 
     override val debugViewHeight = 0
+
+    override fun copyParamsFrom(other: TerrarumAudioFilter) {
+    }
 }