Implement Rit. & Rall on playing Midi

composeApp/build.gradle.kts

@@ -2,6 +2,7 @@ import org.jetbrains.compose.desktop.application.dsl.TargetFormat
 import org.jetbrains.kotlin.gradle.ExperimentalKotlinGradlePluginApi
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 import org.jetbrains.kotlin.gradle.plugin.KotlinSourceSet
+import java.util.Properties
 
 plugins {
     alias(libs.plugins.kotlinMultiplatform)
@@ -13,13 +14,13 @@ plugins {
 }
 
 kotlin {
-    linuxX64 {
+    /*linuxX64 {
         binaries {
             executable {
 
             }
         }
-    }
+    }*/
     androidTarget {
         @OptIn(ExperimentalKotlinGradlePluginApi::class)
         compilerOptions {
@@ -51,10 +52,7 @@ kotlin {
             implementation(libs.koin.android) // Koin Android-specific extensions
             implementation(libs.koin.androidx.compose)
             implementation("com.google.zxing:core:3.5.4")
-            implementation("androidx.camera:camera-view:1.5.2")
-            implementation("androidx.camera:camera-core:1.5.2")
-            implementation("androidx.camera:camera-camera2:1.5.2")
-            implementation("androidx.camera:camera-lifecycle:1.5.2")
+            implementation("com.github.billthefarmer:mididriver:1.25")
         }
         commonMain.dependencies {
 //            implementation(compose.components.resources)

composeApp/src/androidMain/kotlin/mg/dot/feufaro/AndroidFileRepository.kt

@@ -1,6 +1,7 @@
 package mg.dot.feufaro
 
 import android.content.Context
+import android.net.Uri
 import feufaro.composeapp.generated.resources.Res
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
@@ -30,6 +31,12 @@ class AndroidFileRepository(private val context: Context) : FileRepository {
     override suspend fun readFileLines(filePath: String): List<String> = withContext(Dispatchers.IO) {
         try {
             when {
+                filePath.startsWith("content://") -> {
+                    val uri = Uri.parse(filePath)
+                    val inputStream = context.contentResolver.openInputStream(uri)
+                        ?: throw IOException("Impossible d'ouvrir : $filePath")
+                    inputStream.bufferedReader(Charsets.UTF_8).readLines()
+                }
                 filePath.startsWith("assets://") -> {
                     readAssetFileLines(filePath)
                 }

composeApp/src/androidMain/kotlin/mg/dot/feufaro/LaunchFilePicker.kt

@@ -36,6 +36,8 @@ actual fun launchFilePicker(
         if (mimeTypes.size > 1) {
             putExtra(Intent.EXTRA_MIME_TYPES, mimeTypes)
         }
+        addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+        addFlags(Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION)
     }
 
     // 3. Lance le sélecteur
@@ -50,6 +52,16 @@ fun setFilePickerActivity(activity: ComponentActivity) {
     ) { result ->
         if (result.resultCode == Activity.RESULT_OK) {
             val uri: Uri? = result.data?.data
+            if (uri != null) {
+                try {
+                    activity.contentResolver.takePersistableUriPermission(
+                        uri,
+                        Intent.FLAG_GRANT_READ_URI_PERMISSION
+                    )
+                } catch (e: Exception) {
+                    println("takePersistableUriPermission failed: ${e.message}")
+                }
+            }
             fileSelectionCallback?.invoke(uri?.toString())
         } else {
             fileSelectionCallback?.invoke(null)

composeApp/src/androidMain/kotlin/mg/dot/feufaro/MainActivity.kt

@@ -10,6 +10,7 @@ import androidx.core.view.WindowCompat
 import android.view.WindowManager
 import androidx.core.view.WindowInsetsCompat
 import androidx.core.view.WindowInsetsControllerCompat
+import org.koin.androidx.compose.KoinAndroidContext
 
 class MainActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -21,9 +22,11 @@ class MainActivity : ComponentActivity() {
 
 
         setContent {
+            KoinAndroidContext {
                 App()
             }
         }
+    }
     private fun hideSystemBar() {
         // Pour les versions d'Android plus récentes (API 30+)
         if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.R) {

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

@@ -1,170 +1,575 @@
 package mg.dot.feufaro.midi
 
-import android.media.MediaPlayer
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.Job
-import kotlinx.coroutines.SupervisorJob
-import kotlinx.coroutines.cancel
-import kotlinx.coroutines.delay
-import kotlinx.coroutines.launch
+import SharedScreenModel
+import kotlinx.coroutines.*
+import org.billthefarmer.mididriver.MidiDriver
 import java.io.File
-import java.io.FileInputStream
+import java.io.RandomAccessFile
 
-private var androidMediaPlayer: MediaPlayer?= null
+actual class FMediaPlayer actual constructor(
+    private val filename: String,
+    private val onFinished: () -> Unit
+) {
+    private data class MidiEvent(
+        val tickAbsolute: Long,
+        val type: Int,
+        val channel: Int,
+        val data1: Int,
+        val data2: Int,
+        val metaType: Int = -1,
+        val metaData: ByteArray = ByteArray(0)
+    )
 
-actual class FMediaPlayer actual constructor(val filename: String, onFinished: () -> Unit) {
-    private var mediaPlayer: android.media.MediaPlayer? = android.media.MediaPlayer()
-//    private val voiceStates = mutableListOf(true, true, true, true)
-    private val midiFileName = filename
-//    private var currentGlobalVolume: Float = 0.8f
+    private data class MidiSequence(
+        val resolution: Int,
+        val events: List<MidiEvent>,
+        val totalTicks: Long
+    )
+
+    private object MidiParser {
+        fun parse(file: File): MidiSequence {
+            val raf = RandomAccessFile(file, "r")
+            val events = mutableListOf<MidiEvent>()
+            val header = ByteArray(4); raf.readFully(header)
+            require(String(header) == "MThd") { "Not a MIDI file" }
+            raf.readInt()
+            val nTracks   = run { raf.readShort(); raf.readShort().toInt() and 0xFFFF }
+            val division  = raf.readShort().toInt() and 0xFFFF
+            val resolution = division and 0x7FFF
+            for (t in 0 until nTracks) {
+                val trkHeader = ByteArray(4); raf.readFully(trkHeader)
+                if (String(trkHeader) != "MTrk") break
+                val trkLen  = raf.readInt()
+                val trkData = ByteArray(trkLen); raf.readFully(trkData)
+                parseTrack(trkData, events)
+            }
+            raf.close()
+            events.sortBy { it.tickAbsolute }
+            val totalTicks = events.maxOfOrNull { it.tickAbsolute } ?: 0L
+            return MidiSequence(resolution, events, totalTicks)
+        }
+
+        private fun parseTrack(data: ByteArray, out: MutableList<MidiEvent>) {
+            var pos = 0; var tick = 0L; var runningStatus = 0
+            fun readByte() = (data[pos++].toInt() and 0xFF)
+            fun readVarLen(): Long {
+                var value = 0L; var b: Int
+                do { b = readByte(); value = (value shl 7) or (b and 0x7F).toLong() } while (b and 0x80 != 0)
+                return value
+            }
+            while (pos < data.size) {
+                tick += readVarLen()
+                var status = readByte()
+                if (status and 0x80 == 0) {
+                    pos--; status = runningStatus
+                }
+                else if (status and 0xF0 != 0xF0) runningStatus = status
+
+                val type = status and 0xF0;
+                val ch = status and 0x0F
+                when {
+                    status == 0xFF -> {
+                        val mt=readByte();
+                        val len=readVarLen().toInt();
+                        val md=ByteArray(len){data[pos++]};
+                        out.add(MidiEvent(tick,0xFF,0,0,0,mt,md))
+                    }
+                    status == 0xF0 || status == 0xF7 -> repeat(readVarLen().toInt()) {
+                        pos++
+                    }
+                    type == 0x80 -> {
+                        val d1=readByte();
+                        val d2=readByte();
+                        out.add(MidiEvent(tick,0x80,ch,d1,d2))
+                    }
+                    type == 0x90 -> {
+                        val d1=readByte();
+                        val d2=readByte();
+                        out.add(MidiEvent(tick,if(d2==0) 0x80 else 0x90,ch,d1,d2))
+                    }
+                    type == 0xA0 -> {
+                        readByte(); readByte()
+                    }
+                    type == 0xB0 -> {
+                        val d1=readByte();
+                        val d2=readByte();
+                        out.add(MidiEvent(tick,0xB0,ch,d1,d2))
+                    }
+                    type == 0xC0 -> {
+                        val d1=readByte();
+                        out.add(MidiEvent(tick,0xC0,ch,d1,0))
+                    }
+                    type == 0xD0 -> readByte()
+                    type == 0xE0 -> {
+                        readByte(); readByte()
+                    }
+                }
+            }
+        }
+    }
+
+    private val midiDriver: MidiDriver = MidiDriver.getInstance()
+    private var sequence: MidiSequence? = null
+    private var resolution: Int = 480
+    private var usPerTick: Double = 500_000.0 / 480.0
+
+    @Volatile private var isRunning = false
+    @Volatile private var isHolding = false
+    private var currentTickPos: Long = 0L
+    private var lastEventNano: Long = System.nanoTime()
+    private var targetBpm: Float = 120f
+
+    private val voiceVolumes = FloatArray(4) { 127f }
+    private var currentGlobalVolume: Float = 0.8f
+    private var currentDynamicFactor: Float = Dynamic.MF.factor
 
     private var pointA: Long = -1L
     private var pointB: Long = -1L
+    private var isLoopingAB = false
 
     private val playerScope = CoroutineScope(Dispatchers.Default + SupervisorJob())
-    private var abJob: Job? = null
+    private var playJob: Job? = null
+    private var navigationJob: Job? = null
+    private var syncJob: Job? = null
+    private var dynamicJob: Job? = null
+    private var boundModel: SharedScreenModel? = null
 
-    private var isLoopingAB: Boolean = false
+    private data class NavigationStep(
+        val marker: String,
+        val gridIndex: Int,
+        val targetGrid: Int = 0,
+        val isHold: Boolean = false,
+        var alreadyDone: Boolean = false,
+        var beatInDC: Int = 1,
+        val dynamic: Dynamic? = null,
+        val hairPin: Char? = null,
+        val hairPinEndGrid: Int = -1,
+        val hairPinFromFactor: Float = 1.0f,
+        val hairPinToFactor: Float = 1.0f,
+        val isFarany: Boolean = false,
+        var faranyActive: Boolean = false,
+    )
+    private val navigationSteps = mutableListOf<NavigationStep>()
 
     init {
-        playerScope.launch {
-            try {
-                val file = File(midiFileName)
+        midiDriver.start()
+        val file = File(filename)
         if (file.exists()) {
-                    val fis = FileInputStream(file)
-                    mediaPlayer?.setDataSource(fis.fd)
+            try {
+                sequence   = MidiParser.parse(file)
+                resolution = sequence!!.resolution
+                usPerTick  = (60_000_000.0 / targetBpm) / resolution
+            } catch (e: Exception) { e.printStackTrace() }
+        }
+    }
 
-                    mediaPlayer?.setOnCompletionListener {
+    private fun send(vararg bytes: Int) {
+        midiDriver.write(ByteArray(bytes.size) { bytes[it].toByte() })
+    }
+    private fun controlChange(ch: Int, cc: Int, v: Int) = send(0xB0 or ch, cc, v)
+    private fun allNotesOff() {
+        for (ch in 0 until 4) { controlChange(ch, 123, 0); controlChange(ch, 64, 0) }
+    }
+
+    private fun applyVoiceStates() {
+        for (i in 0 until 4) {
+            val vol = (127f * (voiceVolumes[i]/127f) * currentGlobalVolume * currentDynamicFactor)
+                .toInt().coerceIn(0, 127)
+            controlChange(i, 7, vol); controlChange(i, 11, vol)
+            if (vol == 0) controlChange(i, 123, 0)
+        }
+    }
+    private fun applyDynamic(dynamic: Dynamic) {
+        applyDynamicSmooth(if (dynamic == Dynamic.MF) 1.0f else dynamic.factor, 300L)
+    }
+    private fun applyDynamicSmooth(targetFactor: Float, durationMs: Long = 300L) {
+        dynamicJob?.cancel()
+        dynamicJob = playerScope.launch {
+            val start = currentDynamicFactor; val steps = 30; val stepMs = durationMs / steps
+            for (i in 1..steps) {
+                val p = i.toFloat()/steps; val s = p*p*(3f-2f*p)
+                currentDynamicFactor = start + (targetFactor - start) * s
+                applyVoiceStates(); delay(stepMs)
+            }
+            currentDynamicFactor = targetFactor; applyVoiceStates()
+        }
+    }
+    private fun applyCrescendo(fromFactor: Float, toFactor: Float, durationMs: Long) {
+        dynamicJob?.cancel()
+        dynamicJob = playerScope.launch {
+            val steps=40; val stepMs=(durationMs/steps).coerceAtLeast(10L)
+            for (i in 1..steps) {
+                val p=i.toFloat()/steps; val s=p*p*(3f-2f*p)
+                currentDynamicFactor = fromFactor + (toFactor-fromFactor)*s
+                applyVoiceStates(); delay(stepMs)
+            }
+            currentDynamicFactor = toFactor; applyVoiceStates()
+        }
+    }
+    private fun extractDynamic(marker: String) = Dynamic.entries.firstOrNull {
+        it.label == marker.trim().removeSuffix("=").trim()
+    }
+    fun factorToDynamic(factor: Float) =
+        Dynamic.entries.minByOrNull { kotlin.math.abs(it.factor - factor) } ?: Dynamic.MF
+    fun nextDynamic(currentFactor: Float, symbol: Char): Float {
+        val idx = Dynamic.entries.indexOf(factorToDynamic(currentFactor))
+        return if (symbol == '<') Dynamic.entries.getOrElse(idx+1){Dynamic.FFF}.factor
+        else               Dynamic.entries.getOrElse(idx-1){Dynamic.PPP}.factor
+    }
+
+    private fun startPlaybackLoop() {
+        val seq = sequence ?: return
+        isRunning = true
+        playJob?.cancel()
+        playJob = playerScope.launch(Dispatchers.Default) {
+            val events = seq.events
+            var idx = events.indexOfFirst { it.tickAbsolute >= currentTickPos }
+                .takeIf { it >= 0 } ?: events.size
+            var clockNano = System.nanoTime()
+            var clockTick = currentTickPos
+
+            while (isActive && isRunning) {
+                if (isHolding) {
+                    delay(10)
+                    clockNano = System.nanoTime()
+                    clockTick = currentTickPos
+                    continue
+                }
+
+                if (idx >= events.size) {
+                    val dc = getPendingDcStep()
+                    if (dc != null) {
+                        dc.alreadyDone = true
+                        allNotesOff()
+                        seekToGrid(dc.targetGrid)
+                        clockNano = System.nanoTime(); clockTick = currentTickPos
+                        idx = events.indexOfFirst { it.tickAbsolute >= currentTickPos }
+                            .takeIf { it >= 0 } ?: events.size
+                        continue
+                    } else {
+                        isRunning = false; allNotesOff(); onFinished(); break
+                    }
+                }
+
+                val ev = events[idx]
+                val waitNano = (clockNano + ((ev.tickAbsolute - clockTick) * usPerTick * 1000)
+                    .toLong()) - System.nanoTime()
+                if (waitNano > 0) delay((waitNano / 1_000_000).coerceAtLeast(0L))
+
+                currentTickPos = ev.tickAbsolute
+                lastEventNano  = System.nanoTime()
+
+                // A-B loop
+                if (isLoopingAB && pointA >= 0 && pointB > pointA &&
+                    ticksToMs(currentTickPos) >= pointB) {
+                    allNotesOff(); currentTickPos = msToTicks(pointA)
+                    clockNano = System.nanoTime(); clockTick = currentTickPos
+                    idx = events.indexOfFirst { it.tickAbsolute >= currentTickPos }
+                        .takeIf { it >= 0 } ?: events.size
+                    continue
+                }
+
+                when (ev.type) {
+                    0x80 -> send(0x80 or ev.channel, ev.data1, ev.data2)
+                    0x90 -> send(0x90 or ev.channel, ev.data1,
+                        (ev.data2 * currentDynamicFactor).toInt().coerceIn(0, 127))
+                    0xB0 -> if (ev.data1 != 7 && ev.data1 != 11)
+                        send(0xB0 or ev.channel, ev.data1, ev.data2)
+                    0xC0 -> send(0xC0 or ev.channel, ev.data1)
+                    0xFF -> { /* tempo ignoré */ }
+                }
+                idx++
+            }
+        }
+    }
+
+    actual fun seekToGrid(gridIndex: Int) {
+        currentTickPos = gridIndex.toLong() * resolution
+        lastEventNano  = System.nanoTime()  // ← recaler l'horloge d'interpolation
+        val lastDyn = navigationSteps
+            .filter { it.dynamic != null && it.gridIndex <= gridIndex }
+            .maxByOrNull { it.gridIndex }?.dynamic ?: Dynamic.MF
+        currentDynamicFactor = if (lastDyn == Dynamic.MF) 1.0f else lastDyn.factor
+        applyVoiceStates()
+    }
+    private fun ticksToMs(ticks: Long) = (ticks * usPerTick / 1000.0).toLong()
+    private fun msToTicks(ms: Long)    = (ms * 1000.0 / usPerTick).toLong()
+
+    private fun getPendingDcStep(): NavigationStep? =
+        navigationSteps.firstOrNull {
+            !it.alreadyDone &&
+                    it.hairPin == null &&
+                    it.dynamic == null &&
+                    !it.isHold &&
+                    !it.isFarany
+        }
+
+    private fun resetNavigationFlags() {
+        navigationSteps.forEach { it.alreadyDone = false }
+    }
+
+    private fun prepareNavigation(sharedScreenModel: SharedScreenModel) {
+        val metadataList = sharedScreenModel.getFullMarkers()
+        navigationSteps.clear()
+        var lastSegno=0; var lastFactor=Dynamic.MF.factor
+
+        metadataList.forEach { (_, gridIndex, _, _, marker, _, _, note) ->
+            val ci        = gridIndex ?: 0
+            val dsR       = Regex("""D\.?S\.?""");  val dcR = Regex("""D\.?C\.?""")
+            val dsG       = Regex("""D\.?S\.?_GROUP_PART"""); val dcG = Regex("""D\.?C\.?_GROUP_PART""")
+            val last_grid = sharedScreenModel.getTotalGridCount()
+            val hairPins  = sharedScreenModel.getHairPins()
+
+            when {
+                marker.contains("$") -> lastSegno = ci
+
+                marker.contains("\uD834\uDD10") -> {
+                    val beat = if(note.contains('•')) 2 else 1
+                    navigationSteps.add(NavigationStep(marker, ci, isHold=true, beatInDC=beat))
+                }
+
+                dsG.matches(marker.trim()) -> {
+                    val target = if(lastSegno>0) lastSegno else 0
+                    val indx   = if((last_grid-ci)<=0) ci-1 else ci
+                    navigationSteps.add(NavigationStep(marker, indx, targetGrid=target))
+                }
+
+                dsR.matches(marker.trim()) || marker == "DSFin" -> {
+                    navigationSteps.add(NavigationStep(marker, ci,
+                        targetGrid = if(lastSegno>0) lastSegno else 0))
+                }
+
+                dcG.matches(marker.trim()) -> {
+                    val indx = if((last_grid-ci)<=0) ci-1 else ci
+                    navigationSteps.add(NavigationStep(marker, indx, targetGrid=0))
+                    println("DC_GROUP créé à $indx → 0")
+                }
+
+                dcR.matches(marker.trim()) && !marker.contains("DC_GROUP_PART") -> {
+                    val indx = if((last_grid-ci)<=0) ci else ci
+                    navigationSteps.add(NavigationStep(marker, indx, targetGrid=0))
+                    println("DC créé à $indx → 0")
+                }
+
+                // ── Farany ────────────────────────────────
+                marker.trim().equals("Farany_GROUP_PART", ignoreCase = true) -> {
+                    val hasDcAfter = metadataList.any { (_, gi, _, _, mk, _, _, _) ->
+                        (gi ?: 0) > ci &&
+                                (mk.contains(Regex("""D\.?C\.?""")) || mk.contains("DC_GROUP_PART"))
+                    }
+                    if (hasDcAfter) {
+                        navigationSteps.add(NavigationStep(
+                            marker       = marker,
+                            gridIndex    = ci,
+                            targetGrid   = last_grid,
+                            isFarany     = true,
+                            faranyActive = false
+                        ))
+                        println("Farany mémorisé à $ci")
+                    } else {
+                        println("Farany ignoré à $ci")
+                    }
+                }
+
+                extractDynamic(marker) != null && marker.trim() != "=" -> {
+                    val dyn = extractDynamic(marker) ?: return@forEach
+                    lastFactor = if(dyn==Dynamic.MF) 1.0f else dyn.factor
+                    navigationSteps.add(NavigationStep(marker=marker, gridIndex=ci, dynamic=dyn))
+                }
+
+                marker.trim()=="<" || marker.trim()==">" ||
+                        marker.trim().contains("cres", ignoreCase=true) ||
+                        marker.trim().contains("dim",  ignoreCase=true) -> {
+                    val sym = when {
+                        marker.trim()=="<" -> '<'; marker.trim()==">" -> '>'
+                        marker.trim().contains("cres",ignoreCase=true) -> '<'; else -> '>'
+                    }
+                    val pair = hairPins.find{it.startGrid==ci} ?: return@forEach
+                    val explicitAfter = metadataList
+                        .filter{(_,gi,_,_,mk,_,_,_)->(gi?:0)>=pair.endGrid && extractDynamic(mk)!=null}
+                        .minByOrNull{it.gridIndex?:0}?.let{m->extractDynamic(m.marker)}
+                    val from = lastFactor
+                    val to = when {
+                        explicitAfter!=null && sym=='<' && explicitAfter.factor>from -> explicitAfter.factor
+                        explicitAfter!=null && sym=='>' && explicitAfter.factor<from -> explicitAfter.factor
+                        else -> nextDynamic(from, sym)
+                    }
+                    lastFactor = to
+                    navigationSteps.add(NavigationStep(
+                        marker=marker.trim(), gridIndex=ci, hairPin=sym,
+                        hairPinEndGrid=pair.endGrid,
+                        hairPinFromFactor=from, hairPinToFactor=to
+                    ))
+                }
+            }
+        }
+    }
+
+    private fun startNavigationMonitor(sharedScreenModel: SharedScreenModel) {
+        navigationJob?.cancel()
+        navigationJob = playerScope.launch(Dispatchers.Default) {
+            sharedScreenModel.activeIndex.collect { currentIndex ->
+                if (!isRunning || currentIndex < 0) return@collect
+
+                val step = navigationSteps.find {
+                    it.gridIndex == currentIndex && !it.alreadyDone
+                } ?: return@collect
+
+                when {
+                    // ── Farany ────────────────────────────
+                    step.isFarany -> {
+                        if (step.faranyActive) {
+                            println("Farany activé → STOP à grille $currentIndex")
+                            step.alreadyDone = true
+                            isHolding = false
+                            isRunning  = false
+                            playJob?.cancel()
+                            allNotesOff()
                             onFinished()
+                        } else {
+                            println("Farany 1er passage — DC pas encore vu → on continue ✅")
                         }
-                    mediaPlayer?.prepareAsync()
-                    fis.close()
                     }
-            } catch (e: Exception) {
-                e.printStackTrace()
+
+                    // ── Point d'orgue ─────────────────────
+                    step.isHold -> {
+                        val beatMs       = (60_000 / targetBpm).toLong()
+                        val holdDuration = if(step.beatInDC==2) beatMs/2 else beatMs*2
+                        println("POINT D'ORGUE grille $currentIndex | ${holdDuration}ms")
+                        for (ch in 0 until 4) controlChange(ch, 64, 127)
+                        isHolding = true
+                        delay(holdDuration)
+                        isHolding = false
+                        for (ch in 0 until 4) controlChange(ch, 64, 0)
+                        step.alreadyDone = true
+                    }
+
+                    // ── Soufflet ──────────────────────────
+                    step.hairPin != null -> {
+                        step.alreadyDone = true
+                        val dist   = (step.hairPinEndGrid - step.gridIndex).coerceAtLeast(1)
+                        val beatMs = (60_000L / targetBpm).toLong()
+                        applyCrescendo(step.hairPinFromFactor, step.hairPinToFactor,
+                            (dist * beatMs).coerceIn(200L, 5000L))
+                    }
+
+                    // ── Dynamique ─────────────────────────
+                    step.dynamic != null -> {
+                        step.alreadyDone = true
+                        applyDynamic(step.dynamic)
+                    }
+
+                    // ── DC / DS ───────────────────────────
+                    else -> {
+                        step.alreadyDone = true
+                        val beatMs = (60_000 / targetBpm).toLong()
+                        println("avant de sauter bpm=$targetBpm")
+
+                        for (ch in 0 until 4) controlChange(ch, 64, 127)
+                        isHolding = true
+                        delay(beatMs)
+                        allNotesOff()
+
+                        seekToGrid(step.targetGrid)
+                        isHolding = false
+                        for (ch in 0 until 4) controlChange(ch, 64, 0)
+
+                        navigationSteps
+                            .filter { it.isFarany && step.gridIndex > it.gridIndex }
+                            .forEach {
+                                it.faranyActive = true
+                                it.alreadyDone  = false
+                                println("DC grille ${step.gridIndex} > Farany grille ${it.gridIndex} → Farany activé 🔴")
+                            }
+
+                        startPlaybackLoop()
+                        println("DC/DS → grille ${step.targetGrid}")
+                    }
+                }
+            }
+        }
+    }
+
+    private fun startSyncLoop(sharedScreenModel: SharedScreenModel) {
+        syncJob?.cancel()
+        syncJob = playerScope.launch(Dispatchers.Default) {
+            while (isActive) {
+                if (isRunning && !isHolding) {
+                    val elapsedNano  = System.nanoTime() - lastEventNano
+                    val extraTicks   = (elapsedNano / (usPerTick * 1000)).toLong().coerceAtLeast(0L)
+                    val interpolated = (currentTickPos + extraTicks) / resolution
+                    val rawGrid      = interpolated.toInt().coerceAtLeast(0)
+                    sharedScreenModel.updateActiveIndexByIndex(rawGrid)
+                }
+                delay(16)
             }
         }
     }
 
     actual fun play() {
-        mediaPlayer?.let { mp ->
-            if (!mp.isPlaying) {
-                // Ici, le player est prêt sans avoir bloqué l'UI
-                if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) {
-                     try {
-                         val params = mp.playbackParams ?: android.media.PlaybackParams()
-                         params.speed = 1.0f
-                         mp.playbackParams = params
-                     } catch (e: Exception) {
-                         e.printStackTrace()
-                     }
-                }
-                mp.start()
-            }
-        }
+        if (sequence == null) return
+        applyVoiceStates()
+        startPlaybackLoop()
+        println("Android MIDI play — tick=$currentTickPos bpm=$targetBpm")
     }
     actual fun pause() {
-        mediaPlayer?.pause()
+        isRunning = false; isHolding = false
+        playJob?.cancel(); allNotesOff()
     }
     actual fun stop() {
-        try {
-            val file = File(midiFileName)
-            if (file.exists() &&
-             (mediaPlayer?.isPlaying == true)) { // Vérifie l'état avant d'agir
-                mediaPlayer?.stop()
-                mediaPlayer?.reset()
-                mediaPlayer?.prepare()
-                mediaPlayer?.seekTo(0)
+        isRunning = false; isHolding = false
+        playJob?.cancel(); navigationJob?.cancel()
+        allNotesOff(); currentTickPos = 0L
+        resetNavigationFlags(); navigationSteps.clear(); clearLoop()
+        currentDynamicFactor = Dynamic.MF.factor
     }
-            clearLoop()
-        } catch(e: IllegalStateException) {
-            //
+    actual fun release() {
+        stop(); midiDriver.stop(); playerScope.cancel()
     }
-    }
-
-    actual fun getDuration(): Long {
-        return mediaPlayer?.duration?.toLong() ?: 0L
-    }
-
-    actual fun getCurrentPosition(): Long {
-        return mediaPlayer?.currentPosition?.toLong() ?: 0L
-    }
-
     actual fun seekTo(position: Long) {
-        mediaPlayer?.seekTo(position.toInt())
+        currentTickPos = msToTicks(position)
+        lastEventNano  = System.nanoTime()
+        applyVoiceStates()
     }
+    actual fun getDuration(): Long = sequence?.let { ticksToMs(it.totalTicks) } ?: 0L
+    actual fun getCurrentPosition(): Long = ticksToMs(currentTickPos)
     actual fun setVolume(level: Float) {
-        mediaPlayer?.setVolume(level, level)
+        currentGlobalVolume = level
+        midiDriver.setVolume((level*100).toInt().coerceIn(0,100))
+        applyVoiceStates()
     }
-
-    actual fun setPointA() {
-        pointA = mediaPlayer?.currentPosition?.toLong() ?: 0L
+    actual fun setTempo(bpm: Float) {
+        targetBpm = bpm; usPerTick = (60_000_000.0/bpm)/resolution
+        boundModel?.let { prepareNavigation(it) }
+        println("Tempo → $bpm BPM")
     }
-
+    actual fun getCurrentBPM(): Float = targetBpm
+    actual fun requestSync(sharedScreenModel: SharedScreenModel) {
+        val seq = sequence ?: return
+        val totalGrids = (seq.totalTicks/resolution).toInt()
+        val timestamps = (0..totalGrids).map { ticksToMs(it.toLong()*resolution)*1000L }
+        sharedScreenModel.updateTimestamps(timestamps)
+        println("requestSync Android — $totalGrids grilles")
+    }
+    actual fun syncNavigationMonitor(sharedScreenModel: SharedScreenModel) {
+        this.boundModel = sharedScreenModel
+        prepareNavigation(sharedScreenModel)
+        startNavigationMonitor(sharedScreenModel)
+        startSyncLoop(sharedScreenModel)
+    }
+    actual fun setPointA() { pointA = getCurrentPosition() }
     actual fun setPointB() {
-        pointB = mediaPlayer?.currentPosition?.toLong() ?: 0L
-        if (pointB > pointA && pointA != -1L) {
-            isLoopingAB = true
-            startABMonitor()
+        pointB = getCurrentPosition()
+        if (pointB > pointA && pointA != -1L) isLoopingAB = true
     }
-    }
-
-    actual fun clearLoop() {
-        isLoopingAB = false
-        pointA = -1L
-        pointB = -1L
-        abJob?.cancel()
-    }
-
-    private fun startABMonitor() {
-        abJob?.cancel()
-        abJob = playerScope.launch {
-            while (isLoopingAB) {
-                val currentPos = mediaPlayer?.currentPosition?.toLong() ?: 0L
-                if (currentPos >= pointB) {
-                    mediaPlayer?.seekTo(pointA.toInt())
-                }
-                delay(50)
-            }
-        }
-    }
-
+    actual fun clearLoop() { isLoopingAB = false; pointA = -1L; pointB = -1L }
     actual fun getLoopState() = Triple(pointA, pointB, isLoopingAB)
-    actual fun toggleVoice(index: Int) {
-//        voiceStates[index] = !voiceStates[index]
-        println("Toggle voice $index (Limitation: Nécessite SoundFont/Fluidsynth sur Android)")
-    }
-
-//    actual fun getVoiceStates(): List<Boolean> = voiceStates
-    actual fun getVoiceVolumes(): List<Float> = MutableList(4) { 127f }
-
-    actual fun changeInstru(noInstru: Int) {
-    }
-
-    actual fun setTempo(factor: Float) {
-        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) {
-            mediaPlayer?.let {
-                val params = it.playbackParams
-                params.speed = factor
-                it.playbackParams = params
-            }
-        }
-    }
-
-    actual fun getCurrentBPM(): Float {
-        return 120f
-    }
-
+    actual fun toggleVoice(index: Int) { applyVoiceStates() }
     actual fun updateVoiceVolume(voiceIndex: Int, newVolume: Float) {
-        if (voiceIndex in 0..3) {
-            //TODO: implements split voices & change volume per voices
-        }
-    }
-
-    fun release() {
-        mediaPlayer?.release()
-        mediaPlayer = null
-        playerScope.coroutineContext.cancel()
+        if (voiceIndex in 0..3) { voiceVolumes[voiceIndex] = newVolume; applyVoiceStates() }
+    }
+    actual fun getVoiceVolumes(): List<Float> = voiceVolumes.toList()
+    actual fun changeInstru(noInstru: Int) {
+        for (ch in 0 until 4) send(0xC0 or ch, noInstru)
     }
 }

composeApp/src/commonMain/kotlin/mg/dot/feufaro/solfa/Solfa.kt

@@ -161,9 +161,9 @@ class Solfa(val sharedScreenModel: SharedScreenModel, private val fileRepository
                 initialDirectory = if (initialPath.isNotBlank()) initialPath else homedir,
                 onFileSelected = { path ->
                     if (path != null) {
+                        screenModelScope.launch(Dispatchers.Default) {
                             sharedScreenModel.reset()
                             parse(path)
-                        screenModelScope.launch {
                             stateSettings.saveLastUsedDir(path)
                         }
                         //loadSolfa()

composeApp/src/commonMain/kotlin/mg/dot/feufaro/viewmodel/SharedScreenModel.kt

@@ -213,6 +213,8 @@ class SharedScreenModel(private val fileRepository: FileRepository) : ScreenMode
             val isDS = markerText.contains(Regex("""D\.?S\.?"""))
             val isFarany = markerText.trim().equals("Farany", ignoreCase = true)
 
+            val isRit = Regex("""rit\.?|ritard\.?|ritenuto\.?|ritardando""", RegexOption.IGNORE_CASE)
+
             var resultMarker: MidiMarkers = marker
             if(isFarany) {
                 var forwardIndex = index
@@ -287,6 +289,24 @@ class SharedScreenModel(private val fileRepository: FileRepository) : ScreenMode
                         forwardIndex++
                     }
                 }
+            } else if(isRit.containsMatchIn(markerText)) {
+                var forwardIndex = index
+                var foundSeparator = false
+
+                while (forwardIndex < tuos.size) {
+                    val sep = tuos.getOrNull(forwardIndex)?.sep0 ?: ""
+                    if (sep == "/") {
+                        resultMarker = marker.copy(
+                            gridIndex = index,
+                            lastCallerMarker = forwardIndex - 1,
+                            marker = "Ritenuto"
+                        )
+                        println("Rit finalisé : grille $index → ${forwardIndex - 1}")
+                        foundSeparator = true
+                        break
+                    }
+                    forwardIndex++
+                }
             } else {
                 marker
             }
@@ -405,6 +425,8 @@ class SharedScreenModel(private val fileRepository: FileRepository) : ScreenMode
         _showMidiCtrl.value = false
         _expandedFAB.value = false
         _showSearchMenu.value = false
+        _midiMarkersList.value = emptyList()
+        _tuoTimestamps.value   = emptyList()
         updateSearchTxt("")
         tempTimeUnitObjectList.clear()
     }

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

@@ -46,6 +46,9 @@ actual class FMediaPlayer actual constructor(
     private var abJob: Job? = null
 
     private var navigationJob: Job? = null
+
+    private var isInTempoChange: Boolean = false
+    private var tempoChangeJob: Job? = null
     private data class NavigationStep(
         val marker: String,
         val gridIndex: Int,          // L'ancre absolue
@@ -61,6 +64,12 @@ actual class FMediaPlayer actual constructor(
         val hairPinToFactor: Float = 1.0f,
         val isFin: Boolean = false,  // Farany D.C.
         var finActive: Boolean =false,
+        // rit & rall
+        val isTempoChange: Boolean = false,
+        val tempoType: String = "",
+        val endGridForTempo: Int = -1,
+        val targetTempoMultiplier: Float = 0.6f
+
     )
     private val navigationSteps = mutableListOf<NavigationStep>()
 
@@ -195,11 +204,54 @@ actual class FMediaPlayer actual constructor(
             println("applyCrescendo terminé → factor=$currentDynamicFactor")
         }
     }
+    private fun applyTempoChange(
+        startBpm: Float,
+        endBpm: Float,
+        durationMs: Long,
+        tempoType: String
+    ) {
+        tempoChangeJob?.cancel()
+        isInTempoChange = true
+        tempoChangeJob = playerScope.launch {
+            val steps = 50
+            val stepMs = (durationMs / steps).coerceAtLeast(20L)
+            val startTime = System.currentTimeMillis()
+
+            for (i in 1..steps) {
+                val elapsed = System.currentTimeMillis() - startTime
+                val progress = (elapsed.toFloat() / durationMs).coerceIn(0f, 1f)
+                val smooth = progress * progress * (3f - 2f * progress)  // ease-in-out
+                val currentBpm = startBpm + (endBpm - startBpm) * smooth
+
+                sequencer?.tempoInBPM = currentBpm
+
+                delay(stepMs)
+                if (!isActive) break
+            }
+
+            sequencer?.tempoInBPM = endBpm
+            isInTempoChange = false
+        }
+    }
+
+    private fun resetTempoToNormal() {
+        if (sequencer?.tempoInBPM != targetBpm) {
+//            println("Retour au tempo normal: ${sequencer?.tempoInBPM} → $targetBpm BPM")
+            applyTempoChange(
+                startBpm = sequencer?.tempoInBPM ?: targetBpm,
+                endBpm = targetBpm,
+                durationMs = 800L,
+                tempoType = "Retour tempo"
+            )
+        }
+    }
     private fun prepareNavigation(sharedScreenModel: SharedScreenModel) {
         val metadataList = sharedScreenModel.getFullMarkers()
         navigationSteps.clear()
         var lastSegno = 0
         var lastFactor = Dynamic.MF.factor
+        val ritRegex = Regex("""rit\.?|ritard\.?|ritenuto\.?|ritardando""", RegexOption.IGNORE_CASE)
+        val rallRegex = Regex("""rall\.?|rallent\.?|rallentando""", RegexOption.IGNORE_CASE)
 
         metadataList.forEach { (timestamp, gridIndex, template, lastCallerMarker, marker, noteBefore, separat, note) ->
             val currentIndex = gridIndex ?: 0
@@ -230,6 +282,37 @@ actual class FMediaPlayer actual constructor(
                     )
                     println("Point d'orgue (\uD834\uDD10) mémorisée au grille n° $gridIndex")
                 }
+                // Rit ...
+                ritRegex.containsMatchIn(marker) -> {
+                    val endGrid = if(lastCallerMarker == 0) last_grid else lastCallerMarker
+
+                    navigationSteps.add(
+                        NavigationStep(
+                            marker = marker,
+                            gridIndex = currentIndex,
+                            isTempoChange = true,
+                            tempoType = "rit",
+                            endGridForTempo = endGrid,
+                            targetTempoMultiplier = 0.55f // 55% du tempo initial
+                        )
+                    )
+                    println("Ritardando mémorisé à grille $currentIndex jusqu'à $endGrid")
+                }
+                rallRegex.containsMatchIn(marker) -> {
+                    val endGrid = last_grid
+
+                    navigationSteps.add(
+                        NavigationStep(
+                            marker = marker,
+                            gridIndex = currentIndex,
+                            isTempoChange = true,
+                            tempoType = "rall",
+                            endGridForTempo = endGrid,
+                            targetTempoMultiplier = 0.50f // 50% du tempo initial
+                        )
+                    )
+                    println("Rallentando mémorisé à grille $currentIndex jusqu'à $endGrid")
+                }
                 // DS
                 dsGPattern.matches(marker.trim())-> {
                     val target = if (lastSegno > 0) lastSegno else 0
@@ -415,6 +498,9 @@ actual class FMediaPlayer actual constructor(
                     }
 
                     if (step != null) {
+                        if (Math.abs(sequencer!!.tempoInBPM - targetBpm) > 0.1 && !isInTempoChange) {
+                            forceTempo(targetBpm.toDouble())
+                        }
                         when {
                             step.isFin -> {
                                 if(step.finActive) {
@@ -463,6 +549,25 @@ actual class FMediaPlayer actual constructor(
                                 )
                             }
 
+                            //Rit | Rall
+                            step.isTempoChange -> {
+                                step.alreadyDone = true
+                                val currentBpm = sequencer?.tempoInBPM ?: targetBpm
+                                val endBpm = targetBpm * step.targetTempoMultiplier
+                                val gridDistance = (step.endGridForTempo - step.gridIndex).coerceAtLeast(1)
+                                val beatDurationMs = (60_000L / targetBpm).toLong()
+                                val durationMs = (gridDistance * beatDurationMs).coerceIn(1000L, 8000L)
+
+//                                println("${step.tempoType.uppercase()} : Grille ${step.gridIndex} → ${step.endGridForTempo}")
+//                                println("  ${currentBpm} BPM → $endBpm BPM sur ${durationMs}ms")
+
+                                applyTempoChange(
+                                    startBpm = currentBpm,
+                                    endBpm = endBpm,
+                                    durationMs = durationMs,
+                                    tempoType = step.tempoType
+                                )
+                            }
                             //velocity
                             step.dynamic != null -> {
                                 applyDynamic(step.dynamic)
@@ -601,6 +706,7 @@ actual class FMediaPlayer actual constructor(
         navigationSteps.clear()
         clearLoop()
         currentDynamicFactor = Dynamic.MF.factor
+        resetTempoToNormal()
 //        release()
     }
     actual fun getDuration(): Long {