Remember voice states SATB

composeApp/src/desktopMain/kotlin/mg/dot/feufaro/midi/MidiPlayer.kt

@@ -6,15 +6,14 @@ import kotlinx.coroutines.launch
 import mg.dot.feufaro.FileRepository
 import java.io.ByteArrayInputStream
 import java.io.File
+import java.util.prefs.Preferences
 import javax.sound.midi.MidiSystem
 import javax.sound.midi.Sequencer
-import javax.sound.midi.Synthesizer //import javax.sound.midi.ShortMessage
+import javax.sound.midi.Synthesizer
-//import javax.sound.midi.Synthesizer
 import javax.sound.sampled.AudioFormat
 import javax.sound.sampled.AudioSystem
 import javax.sound.sampled.FloatControl
 
-//private var sequencer: javax.sound.midi.Sequencer?= null
 actual class MediaPlayer actual constructor(
     private val filename: String,
     private val onFinished: () -> Unit
@@ -27,6 +26,7 @@ actual class MediaPlayer actual constructor(
         null
     }
 
+    private val prefs = Preferences.userRoot().node("mg.dot.feufaro")
     private var synthetizer = MidiSystem.getSynthesizer() as Synthesizer?
 
     private var pointA: Long = -1L
@@ -53,6 +53,7 @@ actual class MediaPlayer actual constructor(
         val file = File(filename)
         if (file.exists()){
             sequencer?.sequence = MidiSystem.getSequence(file)
+            loadVoiceStates()
             applyVoiceStates()
             sequencer?.addMetaEventListener { meta ->
                 if(meta.type == 47){
@@ -103,16 +104,6 @@ actual class MediaPlayer actual constructor(
                     channel?.controlChange(7, volumeInt)
                 }
             }
-            /*val logVolume = if (level > 0 ){
-                (Math.log10(level.toDouble() * 9 + 1) / Math.log10(10.0)).toFloat()
-            } else {
-                0f
-            }
-            val volumeInt = (logVolume * 127).toInt().coerceIn(0, 127)
-
-            synthetizer?.channels?.forEach { it?.controlChange(7, volumeInt) }
-            synthetizer?.channels?.forEach { it?.controlChange(11, volumeInt) }
-*/
             val mixer = AudioSystem.getMixer(null)
             val lines = mixer.sourceLines
             for (line in lines) {
@@ -124,14 +115,6 @@ actual class MediaPlayer actual constructor(
                 }
             }
 
-//            val msg = ShortMessage()
-//            val receiver = sequencer?.receiver
-//            for (i in 0 until 16) {
-//                val msg = ShortMessage()
-//                msg.setMessage(ShortMessage.CONTROL_CHANGE, i, 7, volumeInt)
-//                receiver?.send(msg, -1)
-//            }
-
         } catch (e: Exception){
             e.printStackTrace()
         }
@@ -170,6 +153,7 @@ actual class MediaPlayer actual constructor(
 
     actual fun toggleVoice(index: Int) {
         voiceStates[index] = !voiceStates[index]
+        saveVoiceStates()
         applyVoiceStates()
     }
 
@@ -204,11 +188,8 @@ actual class MediaPlayer actual constructor(
         }
     }
     actual fun getCurrentBPM(): Float {
-//        return sequencer?.tempoInBPM?.toInt() ?: 0
         val currentFactor = sequencer?.tempoFactor ?: 1.0f
-//        val currentBPM = sequencer?.tempoInBPM ?: 120.0f
         val currentBPM = (120f * currentFactor)
-//        println("202: ${sequencer?.tempoInBPM} ${sequencer?.tempoFactor} ${sequencer?.tempoInMPQ}")
         return currentBPM
     }
 
@@ -231,4 +212,20 @@ actual class MediaPlayer actual constructor(
             e.printStackTrace()
         }
     }
+
+    private fun saveVoiceStates() {
+        val data = voiceStates.joinToString(",")
+        prefs.put("voice_states", data)
+    }
+
+    private fun loadVoiceStates() {
+        val defaultValue = "true,true,true,true"
+        val savedData = prefs.get("voice_states", defaultValue)
+
+        val states = savedData.split(",").map { it.toBoolean() }
+        for (i in 0 until 4) {
+            if (i < states.size) voiceStates[i] = states[i]
+        }
+    }
+
 }