musicplayer: working prev and stop button

MusicPlayer/src/net/torvald/terrarum/musicplayer/gui/MusicPlayer.kt

@@ -9,7 +9,10 @@ import com.badlogic.gdx.utils.JsonValue
 import com.jme3.math.FastMath
 import net.torvald.reflection.extortField
 import net.torvald.terrarum.*
+import net.torvald.terrarum.App.printdbg
 import net.torvald.terrarum.audio.*
+import net.torvald.terrarum.gameworld.fmod
+import net.torvald.terrarum.modulebasegame.MusicContainer
 import net.torvald.terrarum.modulebasegame.TerrarumIngame
 import net.torvald.terrarum.ui.BasicDebugInfoWindow
 import net.torvald.terrarum.ui.Toolkit
@@ -74,33 +77,38 @@ class MusicPlayer(private val ingame: TerrarumIngame) : UICanvas() {
     private val colourControlButton = Color(0xeeeeee_cc.toInt())
 
     init {
-        setAsAlwaysVisible()
+        if (App.getConfigBoolean("musicplayer:usemusicplayer")) {
+            setAsAlwaysVisible()
 
-        // test code
+            // test code
 //        val albumDir = App.customMusicDir + "/Gapless Test 2"
-        val albumDir = App.customMusicDir + "/FurryJoA 2023 Live"
+            val albumDir = App.customMusicDir + "/FurryJoA 2023 Live"
 //        val albumDir = App.customMusicDir + "/Audio Test"
-        val playlistFile = JsonFetcher.invoke("$albumDir/playlist.json")
+            val playlistFile = JsonFetcher.invoke("$albumDir/playlist.json")
 
-        val diskJockeyingMode = playlistFile.get("diskJockeyingMode").asString()
-        val shuffled = playlistFile.get("shuffled").asBoolean()
-        val fileToName = playlistFile.get("titles")
+            val diskJockeyingMode = playlistFile.get("diskJockeyingMode").asString()
+            val shuffled = playlistFile.get("shuffled").asBoolean()
+            val fileToName = playlistFile.get("titles")
 
 
-        AudioMixer.musicTrack.let { track ->
-            track.doGaplessPlayback = (diskJockeyingMode == "continuous")
-            if (track.doGaplessPlayback) {
-                track.pullNextTrack = {
-                    track.currentTrack = ingame.musicGovernor.pullNextMusicTrack(true)
-                    setMusicName(track.currentTrack?.name ?: "")
+            AudioMixer.musicTrack.let { track ->
+                track.doGaplessPlayback = (diskJockeyingMode == "continuous")
+                if (track.doGaplessPlayback) {
+                    track.pullNextTrack = {
+                        track.currentTrack = ingame.musicGovernor.pullNextMusicTrack(true)
+                        setMusicName(track.currentTrack?.name ?: "")
+                    }
                 }
             }
+
+
+            registerPlaylist(albumDir, fileToName, shuffled, diskJockeyingMode)
         }
-
-
-        registerPlaylist(albumDir, fileToName, shuffled, diskJockeyingMode)
     }
 
+    private val playlist: List<MusicContainer>
+        get() = ingame.musicGovernor.extortField<List<MusicContainer>>("songs")!!
+
     fun registerPlaylist(path: String, fileToName: JsonValue, shuffled: Boolean, diskJockeyingMode: String) {
         ingame.musicGovernor.queueDirectory(path, shuffled, diskJockeyingMode) { filename ->
             fileToName.get(filename).let {
@@ -239,13 +247,16 @@ class MusicPlayer(private val ingame: TerrarumIngame) : UICanvas() {
 
                 }
                 1 -> { // prev
-//                    ingame.musicGovernor.playPrevMusic()
+                    getPrevSongFromPlaylist()?.let { ingame.musicGovernor.unshiftPlaylist(it) }
+                    AudioMixer.requestFadeOut(AudioMixer.musicTrack, AudioMixer.DEFAULT_FADEOUT_LEN / 3f)
                 }
                 2 -> { // stop
                     if (AudioMixer.musicTrack.isPlaying) {
+                        val thisMusic = AudioMixer.musicTrack.currentTrack
                         AudioMixer.requestFadeOut(AudioMixer.musicTrack, AudioMixer.DEFAULT_FADEOUT_LEN / 3f)
                         AudioMixer.musicTrack.nextTrack = null
                         ingame.musicGovernor.stopMusic()
+                        thisMusic?.let { ingame.musicGovernor.queueMusicToPlayNext(it) }
                     }
                     else {
                         ingame.musicGovernor.startMusic()
@@ -271,6 +282,18 @@ class MusicPlayer(private val ingame: TerrarumIngame) : UICanvas() {
 
     private var playControlButtonLatched = false
 
+    private fun getPrevSongFromPlaylist(): MusicContainer? {
+        val list = playlist.slice(playlist.indices) // make copy of the list
+        val nowPlaying = AudioMixer.musicTrack.currentTrack ?: return null
+
+        // find current index
+        val currentIndex = list.indexOfFirst { it == nowPlaying }
+        if (currentIndex < 0) return null
+
+        val prevIndex = (currentIndex - 1).fmod(list.size)
+        return list[prevIndex]
+    }
+
 //    private fun smoothstep(x: Float) = (x*x*(3f-2f*x)).coerceIn(0f, 1f)
 //    private fun smootherstep(x: Float) = (x*x*x*(x*(6f*x-15f)+10f)).coerceIn(0f, 1f)
 

assets/mods/musicplayer/configplan.csv

@@ -0,0 +1 @@
+usemusicplayer->Lang:MENU_OPTIONS_USE_MUSIC_PLAYER->toggle

assets/mods/musicplayer/default.json

@@ -0,0 +1,3 @@
+{
+  "usemusicplayer": true
+}

assets/mods/musicplayer/locales/en/musicplayer.json

@@ -0,0 +1,3 @@
+{
+  "MENU_OPTIONS_USE_MUSIC_PLAYER": "Use Music Player"
+}

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

@@ -16,6 +16,7 @@ import net.torvald.terrarum.*
 import net.torvald.terrarum.App.printdbg
 import net.torvald.terrarum.audio.AudioMixer
 import net.torvald.terrarum.audio.TerrarumAudioMixerTrack.Companion.SAMPLING_RATE
+import net.torvald.terrarum.gameworld.fmod
 import java.io.File
 import java.io.FileInputStream
 import javax.sound.sampled.AudioSystem
@@ -135,6 +136,8 @@ data class MusicContainer(
         samplesRead = 0L
         gdxMusic.forceInvoke<Int>("reset", arrayOf())
     }
+
+    override fun equals(other: Any?) = this.file.path == (other as MusicContainer).file.path
 }
 
 class TerrarumMusicGovernor : MusicGovernor() {
@@ -149,7 +152,7 @@ class TerrarumMusicGovernor : MusicGovernor() {
     }
 
     private var songs: List<MusicContainer> = emptyList()
-    private var musicBin: ArrayList<Int> = ArrayList()
+    private var musicBin: ArrayList<MusicContainer> = ArrayList()
     private var shuffled = true
     private var diskJockeyingMode = "intermittent" // intermittent, continuous
 
@@ -184,8 +187,8 @@ class TerrarumMusicGovernor : MusicGovernor() {
         } ?: emptyList() // TODO test code
     }
 
-    private fun restockMUsicBin() {
-        musicBin = if (shuffled) ArrayList(songs.indices.toList().shuffled()) else  ArrayList(songs.indices.toList())
+    private fun restockMusicBin() {
+        musicBin = ArrayList(if (shuffled) songs.shuffled() else songs.slice(songs.indices))
     }
 
     /**
@@ -205,7 +208,30 @@ class TerrarumMusicGovernor : MusicGovernor() {
         this.shuffled = shuffled
         this.diskJockeyingMode = diskJockeyingMode
 
-        restockMUsicBin()
+        restockMusicBin()
+    }
+
+    /**
+     * Adds a song to the head of the internal playlist (`musicBin`)
+     */
+    fun queueMusicToPlayNext(music: MusicContainer) {
+        musicBin.add(0, music)
+    }
+
+    /**
+     * Unshifts an internal playlist (`musicBin`). The `music` argument must be the song that exists on the `songs`.
+     */
+    fun unshiftPlaylist(music: MusicContainer) {
+        val indexAtMusicBin = songs.indexOf(music)
+        if (indexAtMusicBin < 0) throw IllegalArgumentException("The music does not exist on the interal songs list ($music)")
+
+        // rewrite musicBin
+        val newMusicBin = Array(songs.size - indexAtMusicBin) { offset ->
+            val k = offset + indexAtMusicBin
+            songs[k]
+        }
+
+        musicBin = ArrayList(newMusicBin.toList())
     }
 
     private val ambients: List<MusicContainer> =
@@ -300,9 +326,9 @@ class TerrarumMusicGovernor : MusicGovernor() {
 
         // prevent same song to play twice in row (for the most time)
         if (musicBin.isEmpty()) {
-            restockMUsicBin()
+            restockMusicBin()
         }
-        return songs[musicBin.removeAt(0)].also { mus ->
+        return musicBin.removeAt(0).also { mus ->
             if (callNextMusicHook && musicStartHooks.isNotEmpty()) musicStartHooks.forEach { it(mus) }
         }
     }