Implement smart B placementfor A-B looping based measure - windows

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

@@ -17,8 +17,8 @@ expect class FMediaPlayer(filename: String, sharedScreenModel: SharedScreenModel
     fun seekTo(position: Long)
     fun seekToGrid(gridIndex: Int)
     fun setVolume(level: Float)
-    fun setPointA()
+    fun setPointA(grid: Int)
-    fun setPointB()
+    fun setPointB(grid: Int)
     fun clearLoop()
     fun setTempo(bpm: Float)
     fun getCurrentBPM(): Float

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

@@ -46,6 +46,7 @@ import androidx.compose.ui.window.Popup
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import cafe.adriel.voyager.core.annotation.InternalVoyagerApi
 import cafe.adriel.voyager.navigator.internal.BackHandler
+import com.russhwolf.settings.Settings
 import feufaro.composeapp.generated.resources.Emmentaler
 import feufaro.composeapp.generated.resources.PTSerif_Bold
 import feufaro.composeapp.generated.resources.PT_Serif_Bold_Italic
@@ -59,6 +60,7 @@ import mg.dot.feufaro.TUODetailDialog
 import mg.dot.feufaro.data.GridTUOData
 import mg.dot.feufaro.getPathValidator
 import mg.dot.feufaro.getPlatform
+import mg.dot.feufaro.provideSettings
 import mg.dot.feufaro.ui.rememberFileSaveLauncher
 import mg.dot.feufaro.viewmodel.MidiMarkers
 import mg.dot.feufaro.viewmodel.SolfaScreenModel
@@ -283,18 +285,19 @@ fun TimeUnitComposable(
     isCurrentBlock: Boolean = false,
     parentFocusRequester: FocusRequester? = null,
     transpositionInterval: Int,
-    hairpinRange: HairpinRange? = null
+    hairpinRange: HairpinRange? = null,
+    isInABrange: Boolean = false
 ) {
     val col = if (tuo.getNum() % 2 == 0) MaterialTheme.colorScheme.tertiary.copy(alpha = 0.05f) else MaterialTheme.colorScheme.error.copy(alpha = 0.05f)
     val currentDensity = LocalDensity.current
     val colorUnderline = MaterialTheme.colorScheme.onSecondary
-    val animatedColor = if (gridActive) {
+    val animatedColor = when {
-        animateColorAsState(
+        gridActive -> animateColorAsState(
             targetValue = MaterialTheme.colorScheme.secondary.copy(alpha = 1f),
             animationSpec = tween(durationMillis = 100)
         ).value
-    } else {
+        isInABrange -> MaterialTheme.colorScheme.tertiary.copy(alpha = 0.25f)
-        col
+        else -> col
     }
 
     val focusRequesters = remember { List(4) { FocusRequester() } }
@@ -636,6 +639,15 @@ fun LazyVerticalGridTUO(
 
     val platform = getPlatform()
     val isAndroid = platform.name.startsWith("Android")
+    val loopingState by sharedScreenModel.loopingState.collectAsState()
+    val activeIndex by sharedScreenModel.activeIndex.collectAsState()
+    val loopState by produceState(Triple(-1L, -1L, false), sharedScreenModel.mediaPlayer) {
+        while (true) {
+            value = sharedScreenModel.mediaPlayer?.getLoopState() ?: Triple(-1L, -1L, false)
+            kotlinx.coroutines.delay(100)
+        }
+    }
+    val prefs: Settings = provideSettings()
     Column(
         modifier = Modifier
             .fillMaxWidth()
@@ -999,6 +1011,17 @@ fun LazyVerticalGridTUO(
                     Row(modifier = Modifier.fillMaxWidth()) {
                         measureTUOs.forEachIndexed { indexInMeasure, oneTUO ->
                             val globalIndex = (measureIndex * gridColumnCount) + indexInMeasure
+                            val pointA =  loopingState.first
+                            val pointB = loopingState.second
+
+                            val isInABrange = if (pointA != -1 && pointB != -1) {
+                                val min = minOf(pointA, pointB)
+                                val max = maxOf(pointA, pointB)
+                                globalIndex in min..max
+                            } else {
+                                false
+                            }
+
                             val isActive = (globalIndex == activeRowIndex)
                             val isSelectedByKeyboard = (globalIndex == selectedGridIndex)
 
@@ -1083,8 +1106,22 @@ fun LazyVerticalGridTUO(
                                                     selectedTUO = oneTUO
                                                     selectedIndex = globalIndex
                                                     showEditDialog = true
+                                                } else {
+                                                    val isAtStart = loopState.first == -1L
+                                                    val isWaitingForB = loopState.first != -1L && !loopState.third
+
+                                                    if (isWaitingForB) {
+                                                        val enableSmartB = prefs.getBoolean("smartBpoint", true)
+                                                        val smartIndex = if (enableSmartB) {
+                                                            sharedScreenModel.calculateSmartPointB(globalIndex, isZeroIndexed = true)
+                                                        } else {
+                                                            globalIndex
+                                                        }
+                                                        sharedScreenModel.mediaPlayer?.setPointB(smartIndex)
                                                     } else {
                                                         sharedScreenModel.seekToGrid(globalIndex)
+                                                        sharedScreenModel.updateActiveIndexByIndex(globalIndex)
+                                                    }
                                                 }
                                             },
                                             onDoubleTap = { offset ->
@@ -1108,7 +1145,8 @@ fun LazyVerticalGridTUO(
                                         isCurrentBlock = isSelectedByKeyboard && editMode,
                                         parentFocusRequester = focusRequester,
                                         transpositionInterval = currentInterval,
-                                        hairpinRange = hairpinByEndBlock[oneTUO.numBlock]
+                                        hairpinRange = hairpinByEndBlock[oneTUO.numBlock],
+                                        isInABrange = isInABrange
                                     )
 
                                     if (showContextualMenu && selectedIndex == globalIndex) {

composeApp/src/commonMain/kotlin/mg/dot/feufaro/ui/MidiControlPanel.kt

@@ -368,8 +368,8 @@ fun MidiControlPanel(
                         OutlinedButton(
                             onClick = {
                                 when {
-                                    isAtStart -> mediaPlayer.setPointA()
+                                    isAtStart -> mediaPlayer.setPointA(sharedScreenModel.activeIndex.value)
-                                    isWaitingForB -> mediaPlayer.setPointB()
+                                    isWaitingForB -> mediaPlayer.setPointB(sharedScreenModel.activeIndex.value)
                                     isLooping -> {
                                         mediaPlayer.clearLoop()
                                     }

composeApp/src/commonMain/kotlin/mg/dot/feufaro/ui/Settings.kt

@@ -51,6 +51,7 @@ fun Settings(
 ) {
     val prefs: Settings = provideSettings()
     var hasCountIn by remember { mutableStateOf(prefs.getBoolean("isCountIn", true)) }
+    var isSmartPointBLoop by remember { mutableStateOf(prefs.getBoolean("smartBpoint", true)) }
     var isDynamicEnabled by remember { mutableStateOf(Dynamic.isGloballyEnabled) }
     var refreshTrigger by remember { mutableStateOf(0) }
     val isFullScreenEnabled by sharedScreenModel.isFullScreen.collectAsState()
@@ -698,6 +699,7 @@ fun Settings(
                             color = MaterialTheme.colorScheme.surfaceContainerLow,
                             modifier = Modifier.fillMaxWidth()
                         ) {
+                            Column {
                                 Row(
                                     modifier = Modifier
                                         .fillMaxWidth()
@@ -716,7 +718,7 @@ fun Settings(
                                         verticalAlignment = Alignment.CenterVertically,
                                         horizontalArrangement = Arrangement.spacedBy(10.dp)
                                     ) {
-                                    if(!isAndroid) {
+                                        if (!isAndroid) {
                                             val countInStat = if (hasCountIn) "Désactiver" else "Activer"
                                             Text(
                                                 text = countInStat,
@@ -740,6 +742,53 @@ fun Settings(
                                         )
                                     }
                                 }
+                                HorizontalDivider(
+                                    color = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.2f),
+                                    modifier = Modifier.padding(vertical = 4.dp)
+                                )
+                                Row(
+                                    modifier = Modifier
+                                        .fillMaxWidth()
+                                        .padding(horizontal = 16.dp, vertical = 8.dp),
+                                    horizontalArrangement = Arrangement.SpaceBetween,
+                                    verticalAlignment = Alignment.CenterVertically
+                                ) {
+                                    Text(
+                                        text = "A-B lopping intelligent",
+                                        style = MaterialTheme.typography.bodyMedium,
+                                        fontWeight = FontWeight.Normal,
+                                        color = MaterialTheme.colorScheme.onSurface,
+                                        modifier = Modifier.padding(bottom = 8.dp)
+                                    )
+                                    Row(
+                                        verticalAlignment = Alignment.CenterVertically,
+                                        horizontalArrangement = Arrangement.spacedBy(10.dp)
+                                    ) {
+                                        if(!isAndroid) {
+                                            val stat = if (isSmartPointBLoop) "Désactiver" else "Activer"
+                                            Text(
+                                                text = stat,
+                                                style = MaterialTheme.typography.bodyMedium
+                                            )
+                                        }
+                                        Switch(
+                                            checked = isSmartPointBLoop,
+                                            onCheckedChange = { enabled ->
+                                                isSmartPointBLoop = enabled
+                                                prefs.putBoolean("smartBpoint", enabled)
+                                            },
+                                            colors = SwitchDefaults.colors(
+                                                checkedThumbColor = MaterialTheme.colorScheme.onPrimary,
+                                                checkedTrackColor = MaterialTheme.colorScheme.primary,
+                                                uncheckedThumbColor = MaterialTheme.colorScheme.outline,
+                                                uncheckedTrackColor = MaterialTheme.colorScheme.surfaceContainerHighest,
+                                                uncheckedBorderColor = MaterialTheme.colorScheme.outline
+                                            ),
+                                            modifier = Modifier.size(45.dp)
+                                        )
+                                    }
+                                }
+                            }
                         }
                     }
                 }

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

@@ -444,6 +444,36 @@ class SharedScreenModel(private val fileRepository: FileRepository) : ScreenMode
             _activeIndex.value = clamped
         }
     }
+
+    private val _loopingState = MutableStateFlow(Pair(-1, -1))
+    val loopingState: StateFlow<Pair<Int, Int>> = _loopingState.asStateFlow()
+
+    fun updateLoopingState(a: Int, b: Int) {
+        _loopingState.value = Pair(a, b)
+    }
+
+    fun calculateSmartPointB(rawPointB: Int, isZeroIndexed: Boolean = false): Int {
+        val currentMeasure = _measure.value
+        val numerator = currentMeasure.substringBefore("/").toIntOrNull() ?: 4
+
+        val multiple = when (numerator) {
+            2, 4, 8, 10 -> 4
+            3, 6, 9, 12 -> 3
+            else -> 2
+        }
+
+        val remainder = rawPointB % multiple
+        var finalPointB = if (remainder == 0) {
+            rawPointB
+        } else {
+            rawPointB + (multiple - remainder)
+        }
+        if (isZeroIndexed) {
+            finalPointB -= 1
+        }
+
+        return finalPointB
+    }
     private val _gridCount = MutableStateFlow(0)
     val gridCount: StateFlow<Int> = _gridCount.asStateFlow()
 
@@ -681,7 +711,7 @@ class SharedScreenModel(private val fileRepository: FileRepository) : ScreenMode
                 _isPos.value = false
                 player.play()
                 player.setVolume(_volumeLevel.value)
-                if(currentPos.value == 0f) {
+                if (currentPos.value == 0f && _loopingState.value.first == -1) {
                     player.seekTo(0)
                 }
             }
@@ -749,6 +779,7 @@ class SharedScreenModel(private val fileRepository: FileRepository) : ScreenMode
         setTranspositionInterval(0)
         setTranspToC(0)
         setSilentDurBefr(0)
+        updateLoopingState(0, 0)
         _midiMarkersList.value = emptyList()
         _tuoTimestamps.value   = emptyList()
         _searchTitle.value = ""

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

@@ -639,7 +639,7 @@ actual class FMediaPlayer actual constructor(
 
                             //Soufflet
                             step.hairPin != null -> {
-                                val resolution = sequencer?.sequence?.resolution?.toLong() ?: 480L
+                                val resolution = sequencer?.sequence?.resolution?.toLong() ?: 60L
                                 val gridDistance = (step.hairPinEndGrid - step.gridIndex).coerceAtLeast(1)
                                 val beatDurationMs = (60_000L / targetBpm).toLong()
                                 val durationMs = (gridDistance * beatDurationMs).coerceIn(200L, 5000L)
@@ -717,8 +717,8 @@ actual class FMediaPlayer actual constructor(
         syncJob = playerScope.launch(Dispatchers.Default) {
             while (isActive) {
                 if (sequencer?.isRunning == true) {
-                    val resolution = sequencer?.sequence?.resolution?.toLong() ?: 480L
+                    val gridStep = 60L
-                    val gridIndex = (sequencer!!.tickPosition / resolution).toInt()
+                    val gridIndex = (sequencer!!.tickPosition / gridStep).toInt()
                     sharedScreenModel.updateActiveIndexByIndex(gridIndex)
                 }
                 delay(20)
@@ -726,8 +726,8 @@ actual class FMediaPlayer actual constructor(
         }
     }
     actual fun seekToGrid(gridIndex: Int) {
-        val resolution = sequencer?.sequence?.resolution?.toDouble() ?: 480.0
+        val gridStep = 60.0
-        val tick = (gridIndex.toDouble() * resolution).toLong()
+        val tick = (gridIndex.toDouble() * gridStep).toLong()
         sequencer?.tickPosition = tick
 
         applyBpm()
@@ -746,7 +746,17 @@ actual class FMediaPlayer actual constructor(
     }
     actual fun play(){
         if (sequencer?.isOpen == true) {
-            val currentTick = sequencer?.tickPosition ?: 0L
+            var currentTick = sequencer?.tickPosition ?: 0L
+
+            if (isLoopingAB && pointA != -1L) {
+                if (currentTick < pointA || currentTick >= pointB) {
+                    val gridStep = 60.0
+                    val gridIndexA = (pointA / gridStep).toInt()
+                    seekToGrid(gridIndexA)
+                    currentTick = sequencer?.tickPosition ?: pointA
+                }
+            }
+
             if (currentTick == 0L) {
                 resetNavigationFlags()
                 /*targetBpm = initialBpm
@@ -754,7 +764,11 @@ actual class FMediaPlayer actual constructor(
                 boundModel?.setBpmFlow(initialBpm)*/
             }
             val countInEnable = prefs.getBoolean("isCountIn", true)
-            if (currentTick == 0L && countInEnable) {
+
+            val isStartingFromBeginning = (currentTick == 0L)
+            val isStartingFromLoopA = (isLoopingAB && currentTick == pointA)
+
+            if ((isStartingFromBeginning || isStartingFromLoopA) && countInEnable) {
                 playCountIn()
             } else {
                 startMidiPlayback()
@@ -928,12 +942,24 @@ actual class FMediaPlayer actual constructor(
 //        println("la volume $level")
     }
 
-    actual fun setPointA() {
+    actual fun setPointA(grid: Int) {
-        pointA = sequencer?.tickPosition ?: 0L
+        val gridStep = 60.0
+        val tick = (grid.toDouble() * gridStep).toLong()
+        pointA = tick
+
+        val currentB = sharedScreenModel.loopingState.value.second
+        sharedScreenModel.updateLoopingState(grid, currentB)
    }
 
-    actual fun setPointB() {
+    actual fun setPointB(grid: Int) {
-        pointB = sequencer?.tickPosition ?: 0L
+        val gridStep = 60.0
+        val tick = (((grid + 1).toDouble() * gridStep) - 1.0).toLong()
+        pointB = tick.coerceAtLeast(0L)
+
+        val currentA = sharedScreenModel.loopingState.value.first
+        sharedScreenModel.updateLoopingState(currentA, grid)
+        seekToGrid(currentA)
+
         if (pointB > pointA && pointA != -1L) {
             isLoopingAB = true
             startABMonitor()
@@ -942,6 +968,8 @@ actual class FMediaPlayer actual constructor(
 
     actual fun clearLoop() {
         isLoopingAB = false
+        abJob?.cancel()
+        sharedScreenModel.updateLoopingState(-1, -1)
         pointA = -1L
         pointB = -1L
     }