random sound audio bank

src/net/torvald/terrarum/modulebasegame/WorldSimulator.kt

@@ -120,7 +120,7 @@ object WorldSimulator {
 
     fun growOrKillGrass() {
         // season-dependent growth rate
-        // https://www.desmos.com/calculator/ivxyxuj0bm
+        // https://www.desmos.com/calculator/4u5npfxgak
         val baseCount = 2 * world.worldTime.timeDelta
         val season = world.worldTime.ecologicalSeason.coerceIn(0f, 5f) // 1->1.0,  2.5->3.0, 4->1.0
         val seasonalMult = 1f + sech2((season - 2.5f)) * 2f

src/net/torvald/terrarum/modulebasegame/audio/audiobank/AudioBankMusicBox.kt

@@ -19,15 +19,15 @@ class AudioBankMusicBox(override var songFinishedHook: (AudioBank) -> Unit = {})
     }
 
     override val name = "spieluhr"
-    override val samplingRate = 48000f // 122880 // use 122880 to make each tick is 2048 samples
-    override val channels = 1
+    override var samplingRate = 48000f // 122880 // use 122880 to make each tick is 2048 samples
+    override var channels = 1
 
     private val getSample = // usage: getSample(noteNum 0..60)
         InstrumentLoader.load("spieluhr", "basegame", "audio/effects/notes/spieluhr.ogg", 41)
 
     private val SAMPLES_PER_TICK = samplingRate / App.TICK_SPEED // should be 800 on default setting
 
-    override val totalSizeInSamples = getSample(0).first.size.toLong() // length of lowest-pitch note
+    override var totalSizeInSamples = getSample(0).first.size.toLong() // length of lowest-pitch note
 
     private val messageQueue = ArrayList<Msg>()
 

src/net/torvald/terrarum/modulebasegame/audio/audiobank/AudioBankTemplateRandomSound.kt

@@ -0,0 +1,53 @@
+package net.torvald.terrarum.modulebasegame.audio.audiobank
+
+import net.torvald.terrarum.audio.AudioBank
+import net.torvald.terrarum.audio.AudioCodex
+import net.torvald.terrarum.tryDispose
+
+/**
+ * Created by minjaesong on 2024-08-16.
+ */
+open class AudioBankTemplateRandomSound(
+    private val audioCodex: AudioCodex,
+    /** Name must be equal to the name in the AudioCodex identifier */
+    override val name: String,
+
+    override var songFinishedHook: (AudioBank) -> Unit
+) : AudioBank() {
+
+    override var samplingRate: Float = 48000f
+    override var channels: Int = 1
+    override var totalSizeInSamples: Long = 1152L
+
+
+    private var currentSample = audioCodex.getRandomAudio(name)!!.makeCopy()
+        set(value) {
+            field = value
+            samplingRate = value.samplingRate
+            channels = value.channels
+            totalSizeInSamples = value.totalSizeInSamples
+        }
+
+    private fun getNextRandomSample() {
+        currentSample = audioCodex.getRandomAudio(name)!!
+    }
+
+    override fun makeCopy(): AudioBank {
+        return AudioBankTemplateRandomSound(audioCodex, name, songFinishedHook)
+    }
+
+    override fun currentPositionInSamples() = currentSample.currentPositionInSamples()
+
+    override fun readSamples(bufferL: FloatArray, bufferR: FloatArray): Int {
+        return currentSample.readSamples(bufferL, bufferR)
+    }
+
+    override fun reset() {
+        currentSample.tryDispose()
+        getNextRandomSample()
+    }
+
+    override fun dispose() {
+        currentSample.tryDispose()
+    }
+}