feat(player): 4 стиля визуализатора + выбор в настройках

Добавлены стили анимации воспроизведения: столбики от центра, столбики
снизу (спектр), плавная волна, радиальный — все от реального спектра звука
(Visualizer.kt). Пользователь выбирает стиль в Настройках → «Анимация
воспроизведения» (живые превью каждого стиля, тап выбирает). Сохраняется
пер-юзер (DataStore visualizer_style). Плеер рисует выбранный стиль
(радиальный — повыше). Превью и пауза — мягкая «дышащая» анимация.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/src/main/java/com/radiola/data/repository/SettingsRepositoryImpl.kt

@@ -31,6 +31,7 @@ class SettingsRepositoryImpl @Inject constructor(
         private val RECORDING_ENABLED = booleanPreferencesKey("recording_enabled")
         private val PREFERRED_BITRATE = intPreferencesKey("preferred_bitrate")
         private val COUNTRY_CODE = stringPreferencesKey("country_code")
+        private val VISUALIZER_STYLE = stringPreferencesKey("visualizer_style")
     }
 
     override fun getLastStationId(): Flow<Int?> = dataStore.data.map { it[LAST_STATION_ID] }
@@ -57,4 +58,7 @@ class SettingsRepositoryImpl @Inject constructor(
 
     override fun getCountryCode(): Flow<String?> = dataStore.data.map { it[COUNTRY_CODE] }
     override suspend fun setCountryCode(code: String) { dataStore.edit { it[COUNTRY_CODE] = code } }
+
+    override fun getVisualizerStyle(): Flow<String> = dataStore.data.map { it[VISUALIZER_STYLE] ?: "bars_center" }
+    override suspend fun setVisualizerStyle(style: String) { dataStore.edit { it[VISUALIZER_STYLE] = style } }
 }

app/src/main/java/com/radiola/domain/repository/SettingsRepository.kt

@@ -20,4 +20,7 @@ interface SettingsRepository {
     // Код страны пользователя (по IP), напр. "RU". null — не определён.
     fun getCountryCode(): Flow<String?>
     suspend fun setCountryCode(code: String)
+    // Стиль визуализатора звука в плеере (ключ VisualizerStyle).
+    fun getVisualizerStyle(): Flow<String>
+    suspend fun setVisualizerStyle(style: String)
 }

app/src/main/java/com/radiola/ui/components/Visualizer.kt

@@ -0,0 +1,150 @@
+package com.radiola.ui.components
+
+import androidx.compose.animation.core.LinearEasing
+import androidx.compose.animation.core.RepeatMode
+import androidx.compose.animation.core.animateFloat
+import androidx.compose.animation.core.infiniteRepeatable
+import androidx.compose.animation.core.rememberInfiniteTransition
+import androidx.compose.animation.core.tween
+import androidx.compose.foundation.Canvas
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.geometry.CornerRadius
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.geometry.Size
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.Path
+import androidx.compose.ui.graphics.StrokeCap
+import androidx.compose.ui.graphics.drawscope.DrawScope
+import androidx.compose.ui.graphics.drawscope.Stroke
+import androidx.compose.ui.unit.dp
+import kotlin.math.abs
+import kotlin.math.cos
+import kotlin.math.sin
+
+/** Стиль анимации воспроизведения (выбирается пользователем в настройках). */
+enum class VisualizerStyle(val key: String, val label: String) {
+    BARS_CENTER("bars_center", "Центр"),
+    BARS_BOTTOM("bars_bottom", "Снизу"),
+    WAVE("wave", "Волна"),
+    RADIAL("radial", "Круг");
+
+    companion object {
+        fun fromKey(k: String?): VisualizerStyle = entries.firstOrNull { it.key == k } ?: BARS_CENTER
+    }
+}
+
+/**
+ * Визуализатор звука выбранного стиля. levels — реальный спектр (0..1 по полосам);
+ * если его нет (пауза/превью) — мягкая «дышащая» анимация.
+ */
+@Composable
+fun Visualizer(
+    style: VisualizerStyle,
+    levels: FloatArray?,
+    playing: Boolean,
+    color: Color,
+    modifier: Modifier = Modifier,
+) {
+    val phase by rememberInfiniteTransition(label = "viz").animateFloat(
+        initialValue = 0f,
+        targetValue = (Math.PI * 2).toFloat(),
+        animationSpec = infiniteRepeatable(tween(1400, easing = LinearEasing), RepeatMode.Restart),
+        label = "vizPhase",
+    )
+    Canvas(modifier = modifier) {
+        when (style) {
+            VisualizerStyle.BARS_CENTER -> drawBars(levels, phase, playing, color, centered = true)
+            VisualizerStyle.BARS_BOTTOM -> drawBars(levels, phase, playing, color, centered = false)
+            VisualizerStyle.WAVE -> drawWave(levels, phase, playing, color)
+            VisualizerStyle.RADIAL -> drawRadial(levels, phase, playing, color)
+        }
+    }
+}
+
+/** Уровень полосы i из n: реальный спектр → иначе «дышащая» синус-волна. */
+private fun levelAt(i: Int, n: Int, levels: FloatArray?, phase: Float, playing: Boolean): Float {
+    if (!playing) return 0.16f
+    if (levels != null && levels.isNotEmpty()) {
+        val idx = (i * levels.size / n).coerceIn(0, levels.size - 1)
+        return (0.06f + 0.94f * levels[idx]).coerceIn(0f, 1f)
+    }
+    return 0.42f + 0.5f * abs(sin(phase + i * 0.7f))
+}
+
+private fun DrawScope.drawBars(
+    levels: FloatArray?,
+    phase: Float,
+    playing: Boolean,
+    color: Color,
+    centered: Boolean,
+) {
+    val barCount = 36
+    val gap = 3.dp.toPx()
+    val barWidth = (size.width - gap * (barCount - 1)) / barCount
+    val maxH = size.height
+    for (i in 0 until barCount) {
+        val h = maxH * levelAt(i, barCount, levels, phase, playing)
+        val x = i * (barWidth + gap)
+        val y = if (centered) (maxH - h) / 2f else (maxH - h)
+        drawRoundRect(
+            color = color,
+            topLeft = Offset(x, y),
+            size = Size(barWidth, h),
+            cornerRadius = CornerRadius(barWidth / 2f, barWidth / 2f),
+        )
+    }
+}
+
+private fun DrawScope.drawWave(levels: FloatArray?, phase: Float, playing: Boolean, color: Color) {
+    val points = 48
+    val maxH = size.height
+    val stepX = size.width / (points - 1)
+    val ys = FloatArray(points) { i -> maxH * (1f - levelAt(i, points, levels, phase, playing)) }
+
+    val line = Path()
+    val fill = Path()
+    line.moveTo(0f, ys[0])
+    fill.moveTo(0f, maxH)
+    fill.lineTo(0f, ys[0])
+    for (i in 1 until points) {
+        val x = i * stepX
+        val px = (i - 1) * stepX
+        val midX = (px + x) / 2f
+        // Сглаживание кубическими кривыми между точками.
+        line.cubicTo(midX, ys[i - 1], midX, ys[i], x, ys[i])
+        fill.cubicTo(midX, ys[i - 1], midX, ys[i], x, ys[i])
+    }
+    fill.lineTo(size.width, maxH)
+    fill.close()
+    drawPath(fill, color = color.copy(alpha = 0.18f))
+    drawPath(line, color = color, style = Stroke(width = 2.5.dp.toPx(), cap = StrokeCap.Round))
+}
+
+private fun DrawScope.drawRadial(levels: FloatArray?, phase: Float, playing: Boolean, color: Color) {
+    val n = 40
+    val cx = size.width / 2f
+    val cy = size.height / 2f
+    val rInner = minOf(cx, cy) * 0.42f
+    val rMax = minOf(cx, cy) * 0.98f
+    val stroke = (2 * Math.PI * rInner / n / 2).toFloat().coerceIn(2f, 6f)
+    // тонкое кольцо-основа
+    drawCircle(color = color.copy(alpha = 0.25f), radius = rInner * 0.9f, center = Offset(cx, cy), style = Stroke(1.5.dp.toPx()))
+    for (i in 0 until n) {
+        val lv = levelAt(i, n, levels, phase, playing)
+        val ang = (i.toFloat() / n) * (2 * Math.PI).toFloat() - (Math.PI / 2).toFloat()
+        val len = rInner + (rMax - rInner) * lv
+        val sx = cx + cos(ang) * rInner
+        val sy = cy + sin(ang) * rInner
+        val ex = cx + cos(ang) * len
+        val ey = cy + sin(ang) * len
+        drawLine(
+            color = color,
+            start = Offset(sx, sy),
+            end = Offset(ex, ey),
+            strokeWidth = stroke,
+            cap = StrokeCap.Round,
+        )
+    }
+}

app/src/main/java/com/radiola/ui/player/PlayerBottomSheet.kt

@@ -84,6 +84,7 @@ fun PlayerBottomSheet(
     var showQuality by remember { mutableStateOf(false) }
     val currentQuality by viewModel.currentQuality.collectAsState()
     val spectrum by viewModel.spectrum.collectAsState()
+    val vizStyle by viewModel.visualizerStyle.collectAsState()
 
     Column(
         modifier = modifier
@@ -185,13 +186,14 @@ fun PlayerBottomSheet(
         Spacer(Modifier.height(20.dp))
 
         // Живой эквалайзер — вместо прогресс-бара (эфир нельзя перематывать)
-        LiveEqualizer(
+        com.radiola.ui.components.Visualizer(
-            modifier = Modifier
+            style = com.radiola.ui.components.VisualizerStyle.fromKey(vizStyle),
-                .fillMaxWidth()
+            levels = spectrum,
-                .height(40.dp),
             playing = isPlaying,
             color = colors.accent,
-            levels = spectrum
+            modifier = Modifier
+                .fillMaxWidth()
+                .height(if (com.radiola.ui.components.VisualizerStyle.fromKey(vizStyle) == com.radiola.ui.components.VisualizerStyle.RADIAL) 120.dp else 40.dp)
         )
         Spacer(Modifier.height(16.dp))
 

app/src/main/java/com/radiola/ui/player/PlayerViewModel.kt

@@ -44,6 +44,9 @@ class PlayerViewModel @Inject constructor(
     val currentStationPrefix: StateFlow<String?> = playerController.currentStationPrefix
     val spectrum: StateFlow<FloatArray> = playerController.spectrum
 
+    val visualizerStyle: StateFlow<String> = settingsRepository.getVisualizerStyle()
+        .stateIn(viewModelScope, kotlinx.coroutines.flow.SharingStarted.WhileSubscribed(5000), "bars_center")
+
     private val _currentStation = MutableStateFlow<Station?>(null)
     val currentStation: StateFlow<Station?> = _currentStation.asStateFlow()
 

app/src/main/java/com/radiola/ui/settings/SettingsScreen.kt

@@ -41,6 +41,7 @@ fun SettingsScreen(
     val sleepTimer by viewModel.sleepTimerMinutes.collectAsState()
     val enabledServices by viewModel.enabledServices.collectAsState()
     val equalizerPreset by viewModel.equalizerPreset.collectAsState()
+    val visualizerStyle by viewModel.visualizerStyle.collectAsState()
     val isRecordingEnabled by viewModel.isRecordingEnabled.collectAsState()
     val isTesting by viewModel.isTesting.collectAsState()
     val testProgress by viewModel.testProgress.collectAsState()
@@ -231,6 +232,52 @@ fun SettingsScreen(
             }
         }
 
+        // --- Стиль визуализации воспроизведения ---
+        item {
+            SectionLabel("АНИМАЦИЯ ВОСПРОИЗВЕДЕНИЯ")
+            Spacer(Modifier.height(8.dp))
+            Column(verticalArrangement = Arrangement.spacedBy(10.dp)) {
+                com.radiola.ui.components.VisualizerStyle.entries.chunked(2).forEach { rowStyles ->
+                    Row(horizontalArrangement = Arrangement.spacedBy(10.dp)) {
+                        rowStyles.forEach { style ->
+                            val selected = visualizerStyle == style.key
+                            Column(
+                                modifier = Modifier
+                                    .weight(1f)
+                                    .clip(RoundedCornerShape(16.dp))
+                                    .background(colors.surface)
+                                    .border(
+                                        width = if (selected) 2.dp else 1.dp,
+                                        color = if (selected) colors.accent else colors.border,
+                                        shape = RoundedCornerShape(16.dp)
+                                    )
+                                    .clickable { viewModel.setVisualizerStyle(style.key) }
+                                    .padding(12.dp),
+                                horizontalAlignment = Alignment.CenterHorizontally,
+                                verticalArrangement = Arrangement.spacedBy(8.dp)
+                            ) {
+                                com.radiola.ui.components.Visualizer(
+                                    style = style,
+                                    levels = null,
+                                    playing = true,
+                                    color = colors.accent,
+                                    modifier = Modifier
+                                        .fillMaxWidth()
+                                        .height(48.dp)
+                                )
+                                Text(
+                                    text = style.label,
+                                    style = MaterialTheme.typography.labelLarge,
+                                    color = if (selected) colors.accent else colors.textSecondary,
+                                    fontWeight = if (selected) FontWeight.SemiBold else FontWeight.Normal
+                                )
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
         // --- Музыкальные сервисы ---
         item {
             SectionLabel("МУЗЫКАЛЬНЫЕ СЕРВИСЫ")

app/src/main/java/com/radiola/ui/settings/SettingsViewModel.kt

@@ -32,6 +32,9 @@ class SettingsViewModel @Inject constructor(
     val equalizerPreset: StateFlow<String> = settingsRepository.getEqualizerPreset()
         .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5000), "Flat")
 
+    val visualizerStyle: StateFlow<String> = settingsRepository.getVisualizerStyle()
+        .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5000), "bars_center")
+
     val isRecordingEnabled: StateFlow<Boolean> = settingsRepository.isRecordingEnabled()
         .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5000), false)
 
@@ -69,6 +72,10 @@ class SettingsViewModel @Inject constructor(
         viewModelScope.launch { settingsRepository.setEqualizerPreset(preset) }
     }
 
+    fun setVisualizerStyle(style: String) {
+        viewModelScope.launch { settingsRepository.setVisualizerStyle(style) }
+    }
+
     fun setRecordingEnabled(enabled: Boolean) {
         viewModelScope.launch { settingsRepository.setRecordingEnabled(enabled) }
     }