jukebox: speaker sim using convolver

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

@@ -20,8 +20,9 @@ import java.io.File
 import kotlin.math.roundToInt
 
 /**
- * @param ir Binary file containing MONO IR
- * @param crossfeed The amount of channel crossfeeding to simulate the stereo ID
+ * @param ir Binary file containing MONO IR (containing only two channels)
+ * @param crossfeed The amount of channel crossfeeding to simulate the true stereo IR. Fullscale (0.0 - 1.0)
+ * @param gain output gain. Fullscale (0.0 - 1.0)
  */
 class Convolv(ir: File, val crossfeed: Float, gain: Float = 1f / 256f): TerrarumAudioFilter() {
     private val gain: Float = gain / (1f + crossfeed)

src/net/torvald/terrarum/gameactors/Actor.kt

@@ -127,12 +127,13 @@ abstract class Actor : Comparable<Actor>, Runnable {
         return track
     }
 
-    open fun startAudio(music: MusicContainer, volume: TrackVolume = 1.0) {
+    open fun startAudio(music: MusicContainer, volume: TrackVolume = 1.0, doSomethingWithTrack: (TerrarumAudioMixerTrack) -> Unit = {}) {
         getTrackByAudio(music)?.let {
             it.stop()
             it.trackingTarget = this
             it.currentTrack = music
             it.maxVolumeFun = { volume }
+            doSomethingWithTrack(it)
             it.play()
         }
     }
@@ -141,8 +142,11 @@ abstract class Actor : Comparable<Actor>, Runnable {
 
     }*/
 
-    open fun stopAudio(music: MusicContainer) {
-        musicTracks[music]?.stop()
+    open fun stopAudio(music: MusicContainer, doSomethingWithTrack: (TerrarumAudioMixerTrack) -> Unit = {}) {
+        musicTracks[music]?.let {
+            doSomethingWithTrack(it)
+            it.stop()
+        }
     }
 
     /*open fun onAudioInterrupt(sound: Sound) {

src/net/torvald/terrarum/modulebasegame/gameactors/FixtureJukebox.kt

@@ -7,6 +7,8 @@ import net.torvald.terrarum.ModMgr
 import net.torvald.terrarum.TerrarumAppConfiguration.TILE_SIZE
 import net.torvald.terrarum.audio.AudioMixer
 import net.torvald.terrarum.audio.AudioMixer.DEFAULT_FADEOUT_LEN
+import net.torvald.terrarum.audio.dsp.Convolv
+import net.torvald.terrarum.audio.dsp.NullFilter
 import net.torvald.terrarum.gameactors.AVKey
 import net.torvald.terrarum.langpack.Lang
 import net.torvald.terrarum.modulebasegame.MusicContainer
@@ -30,6 +32,7 @@ class FixtureJukebox : Electric {
 
     @Transient private val testMusic = ModMgr.getGdxFile("basegame", "audio/music/discs/01 Thousands of Shards.ogg").let {
         MusicContainer("Thousands of Shards", it.file(), Gdx.audio.newMusic(it)) {
+            unloadConvolver(musicNowPlaying)
             discCurrentlyPlaying = null
             musicNowPlaying = null
             (INGAME.musicGovernor as TerrarumMusicGovernor).stopMusic(pauseLen = Math.random().toFloat() * 30f + 30f)
@@ -79,13 +82,24 @@ class FixtureJukebox : Electric {
         musicNowPlaying = testMusic // todo use index
 
         AudioMixer.requestFadeOut(AudioMixer.musicTrack, DEFAULT_FADEOUT_LEN / 2f) {
-            startAudio(musicNowPlaying!!)
+            startAudio(musicNowPlaying!!) {
+                it.filters[2] = Convolv(ModMgr.getFile("basegame", "audio/convolution/Soundwoofer - large_speaker_Marshall JVM 205C SM57 A 0 0 1.bin"), 0f, 5f / 16f)
+            }
         }
     }
 
     private fun forceStop() {
         musicNowPlaying?.let {
             stopAudio(it)
+            unloadConvolver(it)
+        }
+    }
+
+    private fun unloadConvolver(music: MusicContainer?) {
+        if (music != null) {
+            musicTracks[music]?.let {
+                it.filters[2] = NullFilter
+            }
         }
     }