feat(player-options): add PlayerOptionsViewModel and enhance player UI with options menu

.opencode/opencode.jsonc

@@ -3,6 +3,7 @@
   "mcp": {
     "compose-hot-reload": {
       "enabled": true,
+      "disabled": false,
       "type": "local",
       "command": [
         "./gradlew",
@@ -11,6 +12,20 @@
         "--console=plain",
         "hotMcpServer"
       ]
+    },
+    "android-studio-mcp": {
+      "type": "local",
+      "environment": {
+        "IJ_MCP_SERVER_PORT": "64342"
+      },
+      "enabled": true,
+      "disabled": false,
+      "command": [
+        "/opt/android-studio/jbr/bin/java",
+        "-classpath",
+        "/home/krtirtho/.local/share/Google/AndroidStudio2026.1.4/mcpserver/lib/mcpserver.jar:/home/krtirtho/.local/share/Google/AndroidStudio2026.1.4/mcpserver/lib/io.modelcontextprotocol.kotlin.sdk.jar:/home/krtirtho/.local/share/Google/AndroidStudio2026.1.4/mcpserver/lib/io.github.oshai.kotlin.logging.jvm.jar:/opt/android-studio/lib/util-8.jar:/opt/android-studio/lib/intellij.libraries.kotlinx.coroutines.core.jar:/opt/android-studio/lib/intellij.libraries.ktor.client.cio.jar:/opt/android-studio/lib/intellij.libraries.ktor.client.jar:/opt/android-studio/lib/intellij.libraries.ktor.network.tls.jar:/opt/android-studio/lib/intellij.libraries.ktor.io.jar:/opt/android-studio/lib/intellij.libraries.ktor.utils.jar:/opt/android-studio/lib/intellij.libraries.kotlinx.io.jar:/opt/android-studio/lib/intellij.libraries.kotlinx.serialization.core.jar:/opt/android-studio/lib/intellij.libraries.kotlinx.serialization.json.jar",
+        "com.intellij.mcpserver.stdio.McpStdioRunnerKt"
+      ]
     }
   }
 }

.vscode/settings.json

@@ -0,0 +1,4 @@
+{
+    "gradle.autoDetect": "off",
+    "java.gradle.buildServer.enabled": "off"
+}

AGENTS.md

@@ -57,3 +57,18 @@
 - **Nightly**: builds with `-PversionName=nightly`, tag = `nightly` (updates existing), prerelease.
 - **Android signing**: decodes `secrets.KEYSTORE` (base64) → `composeApp/upload-keystore.jks`, writes signing config into `local.properties` from secrets.
 - `create-release` job (depends on all builds) uses `softprops/action-gh-release@v2` to create the GitHub release with all artifacts attached.
+
+## OpenCode Agent MCP Execution Directives
+
+### 1. Code Discovery & Context Search
+- Use `android-studio-mcp` search/symbol tools to locate declarations before making edits across `:composeApp`, `:plugin_interfaces`, or `:js_plugin_example`[cite: 1, 2].
+- Keep `gradle/libs.versions.toml` as the single source of truth for dependencies and version updates.
+
+### 2. UI Architecture Constraints
+- **Strict ViewModel Separation:** UI composables in `commonMain` must only collect `StateFlow<UiState>` and emit event callbacks. Do NOT write business logic, filtering, or `mutableStateListOf` directly inside `@Composable` functions.
+- **Adaptive Components:** Use `AdaptiveDropdownBottomSheet` or `AdaptiveDialogBottomSheet` inside `commonMain` for adaptive layouts[cite: 2]. Do NOT create platform-specific `expect/actual` variants unless platform-native APIs (like windowing or native scrollbars) are explicitly required[cite: 2].
+
+### 3. Verification & Diagnostic Loops
+- **Post-Edit Verification:** After editing Kotlin code, validate compilation by running `./gradlew :composeApp:check` or `./gradlew :composeApp:assembleDebug` via MCP[cite: 2].
+- **Dispatcher Integrity:** Never remove or bypass `SwingMainDispatcherFactory` in `composeApp/src/jvmMain/.../core/coroutines/`[cite: 2]. It is required to prevent `compose-webview` from hijacking `Dispatchers.Main` away from the Swing EDT[cite: 2].
+- **Live Preview Iteration:** Use `compose-hot-reload` to evaluate UI layout changes headlessly without forcing full Gradle rebuilds.

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/core/audioplayer/AudioPlayer.kt

@@ -17,40 +17,10 @@
 
 package dev.krtirtho.spotube.core.audioplayer
 
-import dev.krtirtho.plugin_interfaces.plugin_apis.audio.StreamProtocol
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.StateFlow
 import kotlin.time.Duration
 
-data class MediaItem(
-    val title: String,
-    val artist: String,
-    val album: String,
-    val duration: Duration,
-    val coverURL: String,
-    val url: String,
-    val protocol: StreamProtocol = StreamProtocol.PROGRESSIVE,
-) {
-    fun toDebugString(): String {
-        return "MediaItem(title='$title', artist='$artist', album='$album', duration=$duration, coverURL='$coverURL', url='$url', protocol=$protocol)"
-    }
-}
-
-enum class LoopState {
-    NONE, ONE, ALL;
-
-    fun next(): LoopState {
-        return when (this) {
-            NONE -> ONE
-            ONE -> ALL
-            ALL -> NONE
-        }
-    }
-}
-
-enum class PlayerState {
-    IDLE, BUFFERING, READY, PLAYING, PAUSED, COMPLETED
-}
 
 interface AudioPlayerInterface {
     //    // Playback

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/core/audioplayer/AudioPlayerModels.kt

@@ -21,6 +21,33 @@ import dev.krtirtho.plugin_interfaces.plugin_apis.audio.StreamProtocol
 import dev.krtirtho.plugin_interfaces.plugin_apis.metadata.track.MetadataTrack
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
+import kotlin.time.Duration
+
+data class MediaItem(
+    val title: String,
+    val artist: String,
+    val album: String,
+    val duration: Duration,
+    val coverURL: String,
+    val url: String,
+    val protocol: StreamProtocol = StreamProtocol.PROGRESSIVE,
+)
+
+enum class LoopState {
+    NONE, ONE, ALL;
+
+    fun next(): LoopState {
+        return when (this) {
+            NONE -> ONE
+            ONE -> ALL
+            ALL -> NONE
+        }
+    }
+}
+
+enum class PlayerState {
+    IDLE, BUFFERING, READY, PLAYING, PAUSED, COMPLETED
+}
 
 @Serializable
 sealed interface QueueEntry {

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/core/di/Modules.kt

@@ -75,6 +75,7 @@ import dev.krtirtho.spotube.modules.settings.SettingsProvider
 import dev.krtirtho.spotube.modules.settings.SettingsRepository
 import dev.krtirtho.spotube.modules.settings.SettingsViewModel
 import dev.krtirtho.spotube.modules.shell.AppShellViewModel
+import dev.krtirtho.spotube.modules.shell.PlayerOptionsViewModel
 import dev.krtirtho.spotube.modules.shell.alternative_track.AlternativeTrackContentViewModel
 import dev.krtirtho.spotube.modules.shell.player_queue.PlayerQueueContentViewModel
 import org.koin.core.module.Module
@@ -96,6 +97,7 @@ val sharedModules = module {
 
     // Shell
     viewModelOf(::AppShellViewModel)
+    viewModelOf(::PlayerOptionsViewModel)
     viewModelOf(::PlayerQueueContentViewModel)
     viewModelOf(::AlternativeTrackContentViewModel)
 

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/core/server/StreamProxy.kt

@@ -53,6 +53,7 @@ import okio.SYSTEM
 import okio.buffer
 import okio.use
 import org.koin.core.component.KoinComponent
+import kotlin.time.Duration.Companion.milliseconds
 
 internal class StreamProxy(
     private val httpClient: HttpClient,
@@ -114,7 +115,7 @@ internal class StreamProxy(
                 logger.d { "Track $trackId is being cached, waiting for cache" }
                 var waited = 0
                 while (waited < 30) {
-                    delay(200)
+                    delay(200.milliseconds)
                     waited++
                     val entry = cacheManager.findCachedEntry(trackId)
                     if (entry != null) {
@@ -245,7 +246,7 @@ internal class StreamProxy(
         call.respond(object : OutgoingContent.WriteChannelContent() {
             override val status: HttpStatusCode = HttpStatusCode.OK
             override val contentType: ContentType = contentType
-            override val contentLength: Long? = rewrittenManifest.encodeToByteArray().size.toLong()
+            override val contentLength: Long = rewrittenManifest.encodeToByteArray().size.toLong()
 
             override suspend fun writeTo(channel: io.ktor.utils.io.ByteWriteChannel) {
                 channel.writeFully(rewrittenManifest.encodeToByteArray())
@@ -305,7 +306,7 @@ internal class StreamProxy(
 
         var currentUrl = streamUrl
         var attemptedRefresh = false
-        var upstream: HttpResponse? = null
+        var upstream: HttpResponse?
 
         while (true) {
             val response = runCatching {

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/core/server/StreamingUrlRepository.kt

@@ -18,15 +18,20 @@
 package dev.krtirtho.spotube.core.server
 
 import dev.krtirtho.plugin_interfaces.plugin_apis.audio.AudioSource
+import dev.krtirtho.plugin_interfaces.plugin_apis.audio.AudioFormat
+import dev.krtirtho.plugin_interfaces.plugin_apis.audio.AudioQuality
+import dev.krtirtho.plugin_interfaces.plugin_apis.audio.AudioStream
 import dev.krtirtho.plugin_interfaces.plugin_apis.audio.StreamProtocol
 import dev.krtirtho.plugin_interfaces.plugin_apis.metadata.track.MetadataTrack
 import dev.krtirtho.spotube.core.audioplayer.AudioPlayerQueue
 import dev.krtirtho.spotube.core.audioplayer.QueueEntry
 import dev.krtirtho.spotube.core.di.injectLogger
 import dev.krtirtho.spotube.modules.plugin.PluginManager
+import dev.krtirtho.spotube.modules.settings.SettingsRepository
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
 import org.koin.core.component.KoinComponent
+import kotlin.math.abs
 import kotlin.time.Clock
 import kotlin.time.Duration.Companion.seconds
 
@@ -36,6 +41,10 @@ data class CachedStreamUrl(
     val expiresAtMs: Long,
     val container: String,
     val codec: String,
+    val source: AudioSource.Streamed? = null,
+    val selectedStream: AudioStream? = null,
+    val preferredFormat: AudioFormat,
+    val preferredQuality: AudioQuality,
 )
 
 data class StreamInfo(
@@ -45,11 +54,11 @@ data class StreamInfo(
     val container: String,
 )
 
-
 class StreamingUrlRepository(
     private val pluginManager: PluginManager,
     private val audioPlayerQueue: AudioPlayerQueue,
     private val matchedTracksRepository: MatchedTracksRepository,
+    private val settingsRepository: SettingsRepository,
 ) : KoinComponent {
 
     companion object {
@@ -62,15 +71,6 @@ class StreamingUrlRepository(
     private val alternativesCacheMutex = Mutex()
     private val alternativesCache = mutableMapOf<String, List<AudioSource>>()
 
-    private fun normalizeManifestUrl(url: String, protocol: StreamProtocol): String {
-        if (url.startsWith("http")) return url
-        val base = when (protocol) {
-            StreamProtocol.DASH, StreamProtocol.HLS -> "https://www.youtube.com"
-            StreamProtocol.PROGRESSIVE -> return url
-        }
-        return "$base$url"
-    }
-
     suspend fun resolveStreamInfo(
         trackId: String,
         forceRefresh: Boolean = false
@@ -91,13 +91,16 @@ class StreamingUrlRepository(
         forceRefresh: Boolean = false
     ): StreamInfo? {
         val trackId = track.id
+        val settings = settingsRepository.userSettings.value
+        val preferredFormat = settings.streamingMusicFormat
+        val preferredQuality = settings.streamingMusicQuality
+
         if (!forceRefresh) {
-            getCachedStreamUrl(trackId)?.let { cached ->
+            getCachedStreamUrl(trackId, preferredFormat, preferredQuality)?.let { cached ->
                 logger.v { "Using cached stream URL for track $trackId" }
                 return cached
             }
         }
-
         val audioPlugin = pluginManager.selectedAudioPlugin.value
         if (audioPlugin == null) {
             logger.w { "No audio plugin selected while resolving stream for track $trackId" }
@@ -120,16 +123,14 @@ class StreamingUrlRepository(
 
             if (stream != null) {
                 logger.d { "Resolved stream for track $trackId using cached source" }
-                val resolvedStream = stream.streams.firstOrNull()
+                val resolvedStream = selectPreferredAudioStream(
-                if (resolvedStream != null) {
+                    stream.streams,
-                    val url = normalizeManifestUrl(resolvedStream.url, resolvedStream.protocol)
+                    preferredFormat,
-                    val info = StreamInfo(
+                    preferredQuality,
-                        url,
-                        resolvedStream.protocol,
-                        resolvedStream.codec,
-                        resolvedStream.container
                 )
-                    cacheStreamInfo(trackId, info)
+                if (resolvedStream != null) {
+                    val info = resolvedStream.toStreamInfo()
+                    cacheStreamInfo(trackId, info, preferredFormat, preferredQuality, stream, resolvedStream)
                     return info
                 }
             }
@@ -182,44 +183,65 @@ class StreamingUrlRepository(
         }
 
         logger.d { "Resolved stream for track $trackId via track lookup" }
-        val resolvedStream = stream.streams.firstOrNull()
+        val resolvedStream = selectPreferredAudioStream(
-        if (resolvedStream != null) {
+            stream.streams,
-            val url = normalizeManifestUrl(resolvedStream.url, resolvedStream.protocol)
+            preferredFormat,
-            val info = StreamInfo(
+            preferredQuality,
-                url,
-                resolvedStream.protocol,
-                resolvedStream.codec,
-                resolvedStream.container
         )
-            cacheStreamInfo(trackId, info)
+        if (resolvedStream != null) {
+            val info = resolvedStream.toStreamInfo()
+            cacheStreamInfo(trackId, info, preferredFormat, preferredQuality, stream, resolvedStream)
             return info
         }
         return null
     }
 
-    suspend fun getCachedStreamUrl(trackId: String): StreamInfo? {
+    private fun AudioStream.toStreamInfo() = StreamInfo(
+        url = normalizeManifestUrl(url, protocol),
+        protocol = protocol,
+        codec = codec,
+        container = container,
+    )
+
+    private suspend fun getCachedStreamUrl(
+        trackId: String,
+        preferredFormat: AudioFormat,
+        preferredQuality: AudioQuality,
+    ): StreamInfo? {
         val now = Clock.System.now().toEpochMilliseconds()
         return streamUrlCacheMutex.withLock {
             val cached = streamUrlCache[trackId] ?: return@withLock null
+            if (cached.preferredFormat != preferredFormat || cached.preferredQuality != preferredQuality) {
+                return@withLock null
+            }
             if (cached.expiresAtMs <= now) {
-                streamUrlCache.remove(trackId)
                 logger.v { "Cached stream URL expired for track $trackId" }
                 return@withLock null
             }
-            StreamInfo(cached.url, cached.protocol, cached.container, cached.codec)
+            StreamInfo(cached.url, cached.protocol, cached.codec, cached.container)
         }
     }
 
-    suspend fun cacheStreamInfo(trackId: String, info: StreamInfo) {
+    private suspend fun cacheStreamInfo(
+        trackId: String,
+        info: StreamInfo,
+        preferredFormat: AudioFormat,
+        preferredQuality: AudioQuality,
+        source: AudioSource.Streamed,
+        selectedStream: AudioStream,
+    ) {
         val expiresAtMs = Clock.System.now().toEpochMilliseconds() + STREAM_URL_CACHE_TTL_MS
         streamUrlCacheMutex.withLock {
-            streamUrlCache[trackId] =
+            streamUrlCache[trackId] = CachedStreamUrl(
-                CachedStreamUrl(
                 url = info.url,
                 protocol = info.protocol,
                 expiresAtMs = expiresAtMs,
                 container = info.container,
-                    codec = info.codec
+                codec = info.codec,
+                source = source,
+                selectedStream = selectedStream,
+                preferredFormat = preferredFormat,
+                preferredQuality = preferredQuality,
             )
         }
     }
@@ -232,6 +254,7 @@ class StreamingUrlRepository(
                 logger.v { "Invalidated cached stream URL for track $trackId" }
             }
         }
+        // Stream metadata is part of the same URL-cache entry and is removed with it.
     }
 
     suspend fun getCachedAlternatives(trackId: String): List<AudioSource>? {
@@ -247,9 +270,77 @@ class StreamingUrlRepository(
         }
     }
 
+    /** Returns stream details from the existing playback URL cache; never fetches them. */
+    suspend fun getCachedStreamUrlEntry(trackId: String): CachedStreamUrl? {
+        val now = Clock.System.now().toEpochMilliseconds()
+        return streamUrlCacheMutex.withLock {
+            val entry = streamUrlCache[trackId] ?: return@withLock null
+            if (entry.expiresAtMs <= now) {
+                logger.v { "Returning expired stream details for track $trackId" }
+            }
+            entry
+        }
+    }
+
     suspend fun invalidateCachedAlternatives(trackId: String) {
         alternativesCacheMutex.withLock {
             alternativesCache.remove(trackId)
         }
     }
+
+}
+
+/**
+ * Resolves a stream URL to an absolute URL. Relative manifest paths (DASH/HLS) are
+ * resolved against the YouTube origin; progressive URLs are returned unchanged.
+ */
+internal fun normalizeManifestUrl(url: String, protocol: StreamProtocol): String {
+    if (url.startsWith("http")) return url
+    return when (protocol) {
+        StreamProtocol.DASH, StreamProtocol.HLS -> "https://www.youtube.com$url"
+        StreamProtocol.PROGRESSIVE -> url
+    }
+}
+
+/** Selects the available stream closest to the user's preferred format and quality. */
+internal fun selectPreferredAudioStream(
+    streams: List<AudioStream>,
+    preferredFormat: AudioFormat,
+    preferredQuality: AudioQuality,
+): AudioStream? = streams.minWithOrNull(
+    compareBy<AudioStream> { stream ->
+        formatMismatchCount(stream, preferredFormat)
+    }.thenBy { stream ->
+        if (stream.matchesQualityType(preferredQuality)) 0 else 1
+    }.thenBy { stream ->
+        stream.qualityDistance(preferredQuality)
+    }.thenBy { stream ->
+        stream.channelDistance(preferredQuality)
+    }
+)
+
+private fun formatMismatchCount(stream: AudioStream, preferredFormat: AudioFormat): Int =
+    (if (stream.codec.equals(preferredFormat.codec, ignoreCase = true)) 0 else 1) +
+        (if (stream.container.equals(preferredFormat.container, ignoreCase = true)) 0 else 1)
+
+private fun AudioStream.matchesQualityType(preferredQuality: AudioQuality): Boolean = when (this) {
+    is AudioStream.Lossy -> preferredQuality is AudioQuality.Lossy
+    is AudioStream.Lossless -> preferredQuality is AudioQuality.Lossless
+}
+
+private fun AudioStream.qualityDistance(preferredQuality: AudioQuality): Long = when {
+    this is AudioStream.Lossy && preferredQuality is AudioQuality.Lossy ->
+        abs(bitrate.toLong() - preferredQuality.bitrate.toLong())
+
+    this is AudioStream.Lossless && preferredQuality is AudioQuality.Lossless ->
+        abs(sampleRate.toLong() - preferredQuality.sampleRate.toLong())
+
+    else -> Long.MAX_VALUE
+}
+
+private fun AudioStream.channelDistance(preferredQuality: AudioQuality): Int = when {
+    this is AudioStream.Lossless && preferredQuality is AudioQuality.Lossless ->
+        abs(channels - preferredQuality.channels)
+
+    else -> 0
 }

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/modules/settings/sections/utils.kt

@@ -146,7 +146,7 @@ internal fun availableAudioQualities(format: AudioFormat, current: AudioQuality)
 }
 
 internal fun AudioFormat.displayLabel(): String {
-    return "${codec.uppercase()} in ${container.uppercase()} • ${preferredQuality().displayLabel()}"
+    return "${codec.uppercase()} in ${container.uppercase()}"
 }
 
 internal fun AudioFormat.preferredQuality(): AudioQuality {

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/modules/shell/AppExpandedPlayer.kt

@@ -66,9 +66,6 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
-import androidx.compose.ui.draw.drawWithCache
-import androidx.compose.ui.graphics.Brush
-import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.vector.ImageVector
 import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.text.font.FontWeight
@@ -77,7 +74,6 @@ import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import coil3.compose.AsyncImage
-import dev.krtirtho.spotube.core.audioplayer.AudioPlayer
 import dev.krtirtho.spotube.core.audioplayer.AudioPlayerInterface
 import dev.krtirtho.spotube.core.audioplayer.AudioPlayerQueue
 import dev.krtirtho.spotube.core.audioplayer.LoopState
@@ -86,7 +82,6 @@ import dev.krtirtho.spotube.core.jam.JamRole
 import dev.krtirtho.spotube.core.jam.JamRoomService
 import dev.krtirtho.spotube.core.navigation.NavigationCommands
 import dev.krtirtho.spotube.core.navigation.Routes
-import dev.krtirtho.spotube.core.ui.base.BaseUITheme
 import dev.krtirtho.spotube.core.ui.base.GhostIconButton
 import dev.krtirtho.spotube.core.ui.base.IconButton
 import dev.krtirtho.spotube.core.ui.base.LocalBaseUITheme
@@ -155,6 +150,7 @@ fun AppExpandedPlayer(
     onSleepTimer: () -> Unit = {},
     audioPlayer: AudioPlayerInterface = koinInject(),
     audioPlayerQueue: AudioPlayerQueue = koinInject(),
+    playerOptionsViewModel: PlayerOptionsViewModel = koinViewModel(),
     savedTracksViewModel: SavedTracksViewModel = koinViewModel<SavedTracksViewModel>(
         key = SAVED_TRACKS_COLLECTION_ID,
         parameters = { parametersOf() }
@@ -169,6 +165,7 @@ fun AppExpandedPlayer(
     val downloadsViewModel: DownloadsViewModel = koinViewModel()
     val navigationCommands: NavigationCommands = koinInject()
     val currentEntry by audioPlayerQueue.currentQueueEntryFlow.collectAsStateWithLifecycle()
+    val playerOptionsUiState by playerOptionsViewModel.uiState.collectAsStateWithLifecycle()
     val currentTrack = remember(currentEntry) {
         (currentEntry as? QueueEntry.StreamingTrack)?.track
     }
@@ -184,9 +181,10 @@ fun AppExpandedPlayer(
     val coverModel = playerUiState.coverUrl.takeIf { it.isNotBlank() }
     var isSeeking by remember { mutableStateOf(false) }
     var seekProgress by remember { mutableFloatStateOf(playerUiState.progress) }
-    var showMoreOptionsSheet by remember { mutableStateOf(false) }
     val moreOptionsSheetState = rememberModalBottomSheetState()
 
+    PlayerOptionDialogs(viewModel = playerOptionsViewModel)
+
 
     LaunchedEffect(playerUiState.progress, isSeeking) {
         if (!isSeeking) {
@@ -241,10 +239,10 @@ fun AppExpandedPlayer(
         modifier = modifier.fillMaxSize(),
         snackbarHost = { SnackbarHost(hostState = snackbarHostState) },
     ) { innerPadding ->
-        if (showMoreOptionsSheet) {
+        if (playerOptionsUiState.isMoreOptionsSheetOpen) {
             ModalBottomSheet(
                 onDismissRequest = {
-                    showMoreOptionsSheet = false
+                    playerOptionsViewModel.dismissMoreOptionsSheet()
                 },
                 sheetState = moreOptionsSheetState
             ) {
@@ -261,7 +259,7 @@ fun AppExpandedPlayer(
                             icon = Iconsax.SwapHorizontal2,
                             label = "Alternative Source",
                             onClick = {
-                                showMoreOptionsSheet = false
+                                playerOptionsViewModel.dismissMoreOptionsSheet()
                                 onAlternativeSource()
                             },
                         )
@@ -287,7 +285,7 @@ fun AppExpandedPlayer(
                             modifier = Modifier
                                 .aspectRatio(1f)
                                 .clickable {
-                                    showMoreOptionsSheet = false
+                                    playerOptionsViewModel.dismissMoreOptionsSheet()
                                     when (status) {
                                         is DownloadStatus.Completed -> {
                                             scope.launch {
@@ -375,7 +373,8 @@ fun AppExpandedPlayer(
                             icon = Iconsax.InconsaxClock,
                             label = "Sleep Timer",
                             onClick = {
-                                showMoreOptionsSheet = false
+                                playerOptionsViewModel.dismissMoreOptionsSheet()
+                                playerOptionsViewModel.showSleepTimerDialog()
                                 onSleepTimer()
                             },
                         )
@@ -385,7 +384,7 @@ fun AppExpandedPlayer(
                             icon = Iconsax.IconsaxCd,
                             label = "Go to Album",
                             onClick = {
-                                showMoreOptionsSheet = false
+                                playerOptionsViewModel.dismissMoreOptionsSheet()
                                 val albumId = currentTrack?.album?.id
                                 if (albumId != null) {
                                     navigationCommands.navigateTo(Routes.Album(albumId))
@@ -394,6 +393,16 @@ fun AppExpandedPlayer(
                             },
                         )
                     }
+                    item {
+                        OptionTile(
+                            icon = Iconsax.Iconsax3DotsMore,
+                            label = "Track Details",
+                            onClick = {
+                                playerOptionsViewModel.dismissMoreOptionsSheet()
+                                playerOptionsViewModel.showTrackDetails()
+                            },
+                        )
+                    }
                 }
             }
         }
@@ -422,7 +431,7 @@ fun AppExpandedPlayer(
                     textAlign = TextAlign.Center,
                     maxLines = 1,
                 )
-                GhostIconButton(onClick = { showMoreOptionsSheet = true }) {
+                GhostIconButton(onClick = playerOptionsViewModel::showMoreOptionsSheet) {
                     Icon(Iconsax.Iconsax3DotsMore, contentDescription = "Player options")
                 }
             }

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/modules/shell/AppLargePlayer.kt

@@ -18,7 +18,6 @@
 package dev.krtirtho.spotube.modules.shell
 
 import androidx.compose.foundation.background
-import androidx.compose.foundation.border
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -34,6 +33,8 @@ import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.layout.windowInsetsPadding
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.DropdownMenu
+import androidx.compose.material3.DropdownMenuItem
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
@@ -54,19 +55,20 @@ import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import coil3.compose.AsyncImage
 import dev.chrisbanes.haze.HazeState
 import dev.chrisbanes.haze.blur.HazeColorEffect
 import dev.chrisbanes.haze.blur.blurEffect
 import dev.chrisbanes.haze.hazeEffect
-import androidx.lifecycle.compose.collectAsStateWithLifecycle
-import coil3.compose.AsyncImage
-import dev.krtirtho.spotube.core.audioplayer.AudioPlayer
 import dev.krtirtho.spotube.core.audioplayer.AudioPlayerInterface
 import dev.krtirtho.spotube.core.audioplayer.AudioPlayerQueue
 import dev.krtirtho.spotube.core.audioplayer.LoopState
 import dev.krtirtho.spotube.core.audioplayer.QueueEntry
 import dev.krtirtho.spotube.core.jam.JamRole
 import dev.krtirtho.spotube.core.jam.JamRoomService
+import dev.krtirtho.spotube.core.navigation.NavigationCommands
+import dev.krtirtho.spotube.core.navigation.Routes
 import dev.krtirtho.spotube.core.ui.base.GhostIconButton
 import dev.krtirtho.spotube.core.ui.base.IconButton
 import dev.krtirtho.spotube.core.ui.base.Slider
@@ -122,6 +124,7 @@ fun AppLargePlayer(
     audioPlayer: AudioPlayerInterface = koinInject(),
     audioPlayerQueue: AudioPlayerQueue = koinInject(),
     downloadsViewModel: DownloadsViewModel = koinViewModel(),
+    playerOptionsViewModel: PlayerOptionsViewModel = koinViewModel(),
     savedTracksViewModel: SavedTracksViewModel = koinViewModel<SavedTracksViewModel>(
         key = SAVED_TRACKS_COLLECTION_ID,
         parameters = { parametersOf() }
@@ -134,11 +137,16 @@ fun AppLargePlayer(
         .collectAsStateWithLifecycle(initialValue = false)
     val scope = rememberCoroutineScope()
     val currentEntry by audioPlayerQueue.currentQueueEntryFlow.collectAsStateWithLifecycle()
+    val currentTrack = (currentEntry as? QueueEntry.StreamingTrack)?.track
+    val playerOptionsUiState by playerOptionsViewModel.uiState.collectAsStateWithLifecycle()
+    val navigationCommands: NavigationCommands = koinInject()
     var isSeeking by remember { mutableStateOf(false) }
     var seekProgress by remember { mutableFloatStateOf(playerUiState.progress) }
     var lastNonZeroVolume by remember { mutableFloatStateOf(if (playerUiState.volume > 0f) playerUiState.volume else 0.6f) }
     val coverModel = playerUiState.coverUrl.takeIf { it.isNotBlank() }
 
+    PlayerOptionDialogs(viewModel = playerOptionsViewModel)
+
     LaunchedEffect(playerUiState.progress, isSeeking) {
         if (!isSeeking) {
             seekProgress = playerUiState.progress
@@ -383,9 +391,46 @@ fun AppLargePlayer(
                         GhostIconButton(onClick = onLyrics) {
                             Icon(Iconsax.IconsaxMusic, contentDescription = "Lyrics")
                         }
-                        GhostIconButton(onClick = onMoreOptions) {
+                        Box {
+                            GhostIconButton(
+                                onClick = {
+                                    playerOptionsViewModel.showMoreOptionsMenu()
+                                    onMoreOptions()
+                                }
+                            ) {
                                 Icon(Iconsax.Iconsax3DotsMore, contentDescription = "More options")
                             }
+                            DropdownMenu(
+                                expanded = playerOptionsUiState.isMoreOptionsMenuOpen,
+                                onDismissRequest = playerOptionsViewModel::dismissMoreOptionsMenu,
+                            ) {
+                                DropdownMenuItem(
+                                    text = { Text("Go to album") },
+                                    enabled = currentTrack?.album?.id != null,
+                                    onClick = {
+                                        playerOptionsViewModel.dismissMoreOptionsMenu()
+                                        currentTrack?.album?.id?.let { albumId ->
+                                            navigationCommands.navigateTo(Routes.Album(albumId))
+                                        }
+                                    },
+                                )
+                                DropdownMenuItem(
+                                    text = { Text("Sleep timer") },
+                                    onClick = {
+                                        playerOptionsViewModel.dismissMoreOptionsMenu()
+                                        playerOptionsViewModel.showSleepTimerDialog()
+                                    },
+                                )
+                                DropdownMenuItem(
+                                    text = { Text("Track details") },
+                                    enabled = currentTrack != null,
+                                    onClick = {
+                                        playerOptionsViewModel.dismissMoreOptionsMenu()
+                                        playerOptionsViewModel.showTrackDetails()
+                                    },
+                                )
+                            }
+                        }
                     }
                     Row(verticalAlignment = Alignment.CenterVertically) {
                         GhostIconButton(

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/modules/shell/PlayerOptionDialogs.kt

@@ -0,0 +1,401 @@
+/*
+ * Copyright (C) 2026 Kingkor Roy Tirtho and Spotube Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package dev.krtirtho.spotube.modules.shell
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import dev.krtirtho.plugin_interfaces.plugin_apis.audio.AudioStream
+import dev.krtirtho.plugin_interfaces.plugin_apis.metadata.track.MetadataTrack
+import dev.krtirtho.spotube.core.ui.base.PrimaryButton
+import dev.krtirtho.spotube.core.ui.base.SecondaryButton
+import dev.krtirtho.spotube.core.ui.base.ThemedDialog
+import dev.krtirtho.spotube.resources.iconsax.Iconsax
+import dev.krtirtho.spotube.resources.iconsax.IconsaxCheckCircle
+import dev.krtirtho.spotube.resources.iconsax.IconsaxDirectboxReceive
+import dev.krtirtho.spotube.core.server.CacheEntry
+
+@Composable
+fun PlayerOptionDialogs(viewModel: PlayerOptionsViewModel) {
+    val uiState by viewModel.uiState.collectAsStateWithLifecycle()
+
+    if (uiState.isSleepTimerDialogOpen) {
+        SleepTimerDialog(
+            minutes = uiState.sleepTimerMinutes,
+            remainingMs = uiState.sleepTimerRemainingMs,
+            onMinutesChange = viewModel::updateSleepTimerMinutes,
+            onStart = viewModel::startSleepTimer,
+            onCancelTimer = viewModel::cancelSleepTimer,
+            onDismiss = viewModel::dismissSleepTimerDialog,
+        )
+    }
+
+    uiState.trackDetails?.let { details ->
+        TrackDetailsDialog(
+            details = details,
+            onDismiss = viewModel::dismissTrackDetails,
+        )
+    }
+}
+
+@Composable
+private fun SleepTimerDialog(
+    minutes: String,
+    remainingMs: Long?,
+    onMinutesChange: (String) -> Unit,
+    onStart: () -> Unit,
+    onCancelTimer: () -> Unit,
+    onDismiss: () -> Unit,
+) {
+    ThemedDialog(
+        onDismissRequest = onDismiss,
+        title = {
+            Text("Sleep timer", style = MaterialTheme.typography.titleLarge)
+        },
+        actions = {
+            if (remainingMs != null) {
+                SecondaryButton(onClick = onCancelTimer) { Text("Cancel timer") }
+            }
+            SecondaryButton(onClick = onDismiss) { Text("Close") }
+            PrimaryButton(
+                onClick = onStart,
+                enabled = minutes.toLongOrNull()?.let { it in 1L..600L } == true,
+            ) {
+                Text("Start")
+            }
+        },
+    ) {
+        Column(verticalArrangement = Arrangement.spacedBy(12.dp)) {
+            if (remainingMs != null) {
+                Text(
+                    text = "Playback will pause in ${formatRemainingTime(remainingMs)}.",
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.primary,
+                )
+            } else {
+                Text(
+                    text = "Pause playback after the selected number of minutes.",
+                    style = MaterialTheme.typography.bodyMedium,
+                )
+            }
+            OutlinedTextField(
+                value = minutes,
+                onValueChange = onMinutesChange,
+                modifier = Modifier.fillMaxWidth(),
+                label = { Text("Minutes") },
+                supportingText = { Text("Choose between 1 and 600 minutes") },
+                keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
+                singleLine = true,
+            )
+        }
+    }
+}
+
+@Composable
+private fun TrackDetailsDialog(
+    details: PlayerTrackDetails,
+    onDismiss: () -> Unit,
+) {
+    ThemedDialog(
+        onDismissRequest = onDismiss,
+        title = {
+            Column(verticalArrangement = Arrangement.spacedBy(4.dp)) {
+                Text("Track details", style = MaterialTheme.typography.titleLarge)
+                Text(
+                    details.track.title,
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        },
+        actions = {
+            SecondaryButton(onClick = onDismiss) { Text("Close") }
+        },
+    ) {
+        Column(verticalArrangement = Arrangement.spacedBy(14.dp)) {
+            if (details.isLoading) {
+                Row(
+                    modifier = Modifier.fillMaxWidth().padding(vertical = 20.dp),
+                    horizontalArrangement = Arrangement.Center,
+                ) {
+                    CircularProgressIndicator()
+                }
+            }
+
+            if (details.localCacheEntry != null) {
+                LocalCacheBanner(details.localCacheEntry)
+            }
+            if (details.localCacheEntry == null && details.activeStreamMatchesPreference == false) {
+                Surface(
+                    modifier = Modifier.fillMaxWidth(),
+                    shape = RoundedCornerShape(12.dp),
+                    color = MaterialTheme.colorScheme.tertiaryContainer,
+                ) {
+                    Text(
+                        "The playback URL was resolved with different streaming settings. The highlighted stream matches your current preference; the active URL refreshes on the next stream request.",
+                        modifier = Modifier.padding(12.dp),
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onTertiaryContainer,
+                    )
+                }
+            }
+
+            TrackMetadataSection(details.track)
+
+            Text(
+                "Matched audio source",
+                style = MaterialTheme.typography.titleSmall,
+                fontWeight = FontWeight.SemiBold,
+            )
+            val source = details.matchedSource
+            if (details.isLoading) {
+                Text("Loading matched source…", style = MaterialTheme.typography.bodySmall)
+            } else if (source == null) {
+                Text(
+                    details.error ?: if (details.localCacheEntry != null) {
+                        "A matched remote source is not needed while playing the local cached file."
+                    } else {
+                        "No matched source is available."
+                    },
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            } else {
+                DetailRow("Title", source.title)
+                DetailRow("ID", source.id)
+                DetailRow("Artist", source.artist)
+                DetailRow("Album", source.album)
+                DetailRow("Confidence", "${(source.confidence * 100).toInt()}%")
+                DetailRow("External URI", source.externalUri)
+            }
+
+            Text(
+                "Available streams",
+                style = MaterialTheme.typography.titleSmall,
+                fontWeight = FontWeight.SemiBold,
+            )
+            when {
+                details.localCacheEntry != null && details.streams.isEmpty() -> Text(
+                    "This track is being served from the local cache. Stream variants are not used for this playback.",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+
+                details.isLoading -> Text("Loading streams…", style = MaterialTheme.typography.bodySmall)
+                details.streams.isEmpty() -> Text(
+                    details.error ?: "No streams are available for this source.",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+
+                else -> details.streams.forEach { stream ->
+                    val isSelected = stream == details.preferredStream
+                    Surface(
+                        modifier = Modifier.fillMaxWidth(),
+                        shape = RoundedCornerShape(12.dp),
+                        color = if (isSelected) {
+                            MaterialTheme.colorScheme.primaryContainer
+                        } else {
+                            MaterialTheme.colorScheme.surfaceContainerHigh
+                        },
+                    ) {
+                        Column(
+                            modifier = Modifier.padding(12.dp),
+                            verticalArrangement = Arrangement.spacedBy(4.dp),
+                        ) {
+                            Row(
+                                modifier = Modifier.fillMaxWidth(),
+                                verticalAlignment = Alignment.CenterVertically,
+                                horizontalArrangement = Arrangement.SpaceBetween,
+                            ) {
+                                Text(
+                                    text = streamFormatAndQuality(stream),
+                                    style = MaterialTheme.typography.bodyMedium,
+                                    fontWeight = if (isSelected) FontWeight.Bold else FontWeight.Normal,
+                                    color = if (isSelected) {
+                                        MaterialTheme.colorScheme.onPrimaryContainer
+                                    } else {
+                                        MaterialTheme.colorScheme.onSurface
+                                    },
+                                    modifier = Modifier.weight(1f),
+                                )
+                                if (isSelected) {
+                                    Icon(
+                                        imageVector = Iconsax.IconsaxCheckCircle,
+                                        contentDescription = "Currently selected stream",
+                                        tint = MaterialTheme.colorScheme.primary,
+                                    )
+                                }
+                            }
+                            Text(
+                                "${stream.protocol} • ${stream.codec} • ${stream.container}",
+                                style = MaterialTheme.typography.labelSmall,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            )
+                            Text(
+                                stream.url,
+                                style = MaterialTheme.typography.labelSmall,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            )
+                            if (isSelected) {
+                                Text(
+                                    "Matches your streaming format & quality preference",
+                                    style = MaterialTheme.typography.labelSmall,
+                                    color = MaterialTheme.colorScheme.primary,
+                                )
+                            }
+                        }
+                    }
+                }
+            }
+
+            details.activeStreamUrl?.let { activeUrl ->
+                DetailRow("Active playback URL", activeUrl)
+            }
+        }
+    }
+}
+
+@Composable
+private fun LocalCacheBanner(entry: CacheEntry) {
+    Surface(
+        modifier = Modifier.fillMaxWidth(),
+        shape = RoundedCornerShape(12.dp),
+        color = MaterialTheme.colorScheme.secondaryContainer,
+    ) {
+        Row(
+            modifier = Modifier.padding(12.dp),
+            horizontalArrangement = Arrangement.spacedBy(10.dp),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            Icon(
+                imageVector = Iconsax.IconsaxDirectboxReceive,
+                contentDescription = null,
+                tint = MaterialTheme.colorScheme.onSecondaryContainer,
+            )
+            Column(verticalArrangement = Arrangement.spacedBy(2.dp)) {
+                Text(
+                    "Served from local cache",
+                    style = MaterialTheme.typography.labelLarge,
+                    fontWeight = FontWeight.SemiBold,
+                    color = MaterialTheme.colorScheme.onSecondaryContainer,
+                )
+                Text(
+                    "${entry.filename} • ${formatFileSize(entry.sizeBytes)}",
+                    style = MaterialTheme.typography.labelSmall,
+                    color = MaterialTheme.colorScheme.onSecondaryContainer,
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun TrackMetadataSection(track: MetadataTrack) {
+    Text(
+        "Metadata track",
+        style = MaterialTheme.typography.titleSmall,
+        fontWeight = FontWeight.SemiBold,
+    )
+    DetailRow("ID", track.id)
+    DetailRow("Title", track.title)
+    DetailRow("Artists", track.artists.joinToString { it.name })
+    DetailRow("Album", track.album?.title)
+    DetailRow("Album ID", track.album?.id)
+    DetailRow("Album type", track.album?.albumType?.name)
+    DetailRow("Album release date", track.album?.releaseDate)
+    DetailRow("Album track count", track.album?.trackCount?.toString())
+    DetailRow("Album genres", track.album?.genres?.joinToString())
+    DetailRow("Duration", formatRemainingTime(track.durationMs))
+    DetailRow("Track number", track.trackNumber?.toString())
+    DetailRow("Disc number", track.discNumber?.toString())
+    DetailRow("Explicit", track.explicit?.toString())
+    DetailRow("Popularity", track.popularity?.toString())
+    DetailRow("ISRC", track.isrcCode)
+    DetailRow("External URI", track.externalUri)
+    DetailRow("Thumbnail URLs", track.thumbnails?.joinToString { it.url })
+}
+
+@Composable
+private fun DetailRow(label: String, value: String?) {
+    if (value.isNullOrBlank()) return
+    Row(
+        modifier = Modifier.fillMaxWidth(),
+        horizontalArrangement = Arrangement.spacedBy(8.dp),
+    ) {
+        Text(
+            label,
+            modifier = Modifier.weight(0.38f),
+            style = MaterialTheme.typography.labelMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+        Text(
+            value,
+            modifier = Modifier.weight(0.62f),
+            style = MaterialTheme.typography.bodySmall,
+        )
+    }
+}
+
+private fun streamFormatAndQuality(stream: AudioStream): String = when (stream) {
+    is AudioStream.Lossy -> "${stream.bitrate / 1_000} kbps"
+    is AudioStream.Lossless -> {
+        val rate = if (stream.sampleRate % 1_000 == 0) {
+            "${stream.sampleRate / 1_000}"
+        } else {
+            "${stream.sampleRate / 1_000.0}"
+        }
+        "$rate kHz • ${stream.channels} ch"
+    }
+}
+
+private fun formatRemainingTime(milliseconds: Long): String {
+    val totalSeconds = (milliseconds / 1_000).coerceAtLeast(0)
+    val hours = totalSeconds / 3_600
+    val minutes = (totalSeconds % 3_600) / 60
+    val seconds = totalSeconds % 60
+    return if (hours > 0) {
+        "$hours:${minutes.toString().padStart(2, '0')}:${seconds.toString().padStart(2, '0')}"
+    } else {
+        "$minutes:${seconds.toString().padStart(2, '0')}"
+    }
+}
+
+private fun formatFileSize(sizeBytes: Long): String = when {
+    sizeBytes >= 1024L * 1024L -> "${sizeBytes / (1024L * 1024L)} MB"
+    sizeBytes >= 1024L -> "${sizeBytes / 1024L} KB"
+    else -> "$sizeBytes B"
+}

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/modules/shell/PlayerOptionsViewModel.kt

@@ -0,0 +1,241 @@
+/*
+ * Copyright (C) 2026 Kingkor Roy Tirtho and Spotube Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package dev.krtirtho.spotube.modules.shell
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import dev.krtirtho.plugin_interfaces.plugin_apis.audio.AudioSource
+import dev.krtirtho.plugin_interfaces.plugin_apis.audio.AudioStream
+import dev.krtirtho.plugin_interfaces.plugin_apis.metadata.track.MetadataTrack
+import dev.krtirtho.spotube.core.audioplayer.AudioPlayerInterface
+import dev.krtirtho.spotube.core.audioplayer.AudioPlayerQueue
+import dev.krtirtho.spotube.core.audioplayer.QueueEntry
+import dev.krtirtho.spotube.core.server.CacheEntry
+import dev.krtirtho.spotube.core.server.CacheManager
+import dev.krtirtho.spotube.core.server.MatchedTracksRepository
+import dev.krtirtho.spotube.core.server.StreamingUrlRepository
+import dev.krtirtho.spotube.core.server.normalizeManifestUrl
+import dev.krtirtho.spotube.core.server.selectPreferredAudioStream
+import dev.krtirtho.spotube.modules.settings.SettingsRepository
+import kotlinx.coroutines.CancellationException
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.IO
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import kotlin.time.Duration.Companion.milliseconds
+
+data class PlayerTrackDetails(
+    val track: MetadataTrack,
+    val matchedSource: AudioSource.Basic? = null,
+    val streams: List<AudioStream> = emptyList(),
+    /** Stream picked by the current streaming format/quality preference. */
+    val preferredStream: AudioStream? = null,
+    /** URL currently used for playback, read from the playback URL cache. */
+    val activeStreamUrl: String? = null,
+    /** Whether the active URL matches what the current preferences select. */
+    val activeStreamMatchesPreference: Boolean? = null,
+    val localCacheEntry: CacheEntry? = null,
+    val isLoading: Boolean = false,
+    val error: String? = null,
+)
+
+data class PlayerOptionsUiState(
+    val isMoreOptionsMenuOpen: Boolean = false,
+    val isMoreOptionsSheetOpen: Boolean = false,
+    val isSleepTimerDialogOpen: Boolean = false,
+    val sleepTimerMinutes: String = "30",
+    val sleepTimerRemainingMs: Long? = null,
+    val trackDetails: PlayerTrackDetails? = null,
+)
+
+class PlayerOptionsViewModel(
+    private val audioPlayer: AudioPlayerInterface,
+    private val audioPlayerQueue: AudioPlayerQueue,
+    private val matchedTracksRepository: MatchedTracksRepository,
+    private val streamingUrlRepository: StreamingUrlRepository,
+    private val cacheManager: CacheManager,
+    private val settingsRepository: SettingsRepository,
+) : ViewModel() {
+    private val _uiState = MutableStateFlow(PlayerOptionsUiState())
+    val uiState: StateFlow<PlayerOptionsUiState> = _uiState.asStateFlow()
+
+    private var sleepTimerJob: Job? = null
+    private var trackDetailsJob: Job? = null
+
+    fun showMoreOptionsMenu() {
+        _uiState.update {
+            it.copy(isMoreOptionsMenuOpen = true, isMoreOptionsSheetOpen = false)
+        }
+    }
+
+    fun dismissMoreOptionsMenu() {
+        _uiState.update { it.copy(isMoreOptionsMenuOpen = false) }
+    }
+
+    fun showMoreOptionsSheet() {
+        _uiState.update {
+            it.copy(isMoreOptionsSheetOpen = true, isMoreOptionsMenuOpen = false)
+        }
+    }
+
+    fun dismissMoreOptionsSheet() {
+        _uiState.update { it.copy(isMoreOptionsSheetOpen = false) }
+    }
+
+    fun showSleepTimerDialog() {
+        _uiState.update { it.copy(isSleepTimerDialogOpen = true) }
+    }
+
+    fun dismissSleepTimerDialog() {
+        _uiState.update { it.copy(isSleepTimerDialogOpen = false) }
+    }
+
+    fun updateSleepTimerMinutes(minutes: String) {
+        if (minutes.all(Char::isDigit)) {
+            _uiState.update { it.copy(sleepTimerMinutes = minutes) }
+        }
+    }
+
+    fun startSleepTimer() {
+        val minutes = _uiState.value.sleepTimerMinutes.toLongOrNull()
+            ?.takeIf { it in 1..600 } ?: return
+        val durationMs = minutes * MILLIS_PER_MINUTE
+
+        sleepTimerJob?.cancel()
+        sleepTimerJob = viewModelScope.launch {
+            var remainingMs = durationMs
+            while (remainingMs > 0L) {
+                _uiState.update { it.copy(sleepTimerRemainingMs = remainingMs) }
+                val tickMs = minOf(remainingMs, MILLIS_PER_SECOND)
+                delay(tickMs.milliseconds)
+                remainingMs -= tickMs
+            }
+            runCatching { audioPlayer.pause() }
+            _uiState.update { it.copy(sleepTimerRemainingMs = null, isSleepTimerDialogOpen = false) }
+        }
+    }
+
+    fun cancelSleepTimer() {
+        sleepTimerJob?.cancel()
+        sleepTimerJob = null
+        _uiState.update { it.copy(sleepTimerRemainingMs = null) }
+    }
+
+    fun showTrackDetails() {
+        val track = (audioPlayerQueue.currentQueueEntryFlow.value as? QueueEntry.StreamingTrack)
+            ?.track ?: return
+        trackDetailsJob?.cancel()
+        _uiState.update {
+            it.copy(
+                trackDetails = PlayerTrackDetails(track = track, isLoading = true),
+            )
+        }
+        trackDetailsJob = viewModelScope.launch {
+            runCatching {
+                val settings = settingsRepository.userSettings.value
+                withContext(Dispatchers.IO) {
+                    val matchedSource = matchedTracksRepository.getTrackSource(track)
+                    val cachedStream = streamingUrlRepository.getCachedStreamUrlEntry(track.id)
+                    val localCacheEntry = if (settings.enableMusicCaching) {
+                        cacheManager.findCachedEntry(track.id)?.second
+                    } else {
+                        null
+                    }
+                    val cachedStreamSource = cachedStream?.source?.takeIf {
+                        matchedSource == null || it.id == matchedSource.id
+                    }
+
+                    val source = matchedSource ?: cachedStreamSource?.toBasic()
+                    val streams = cachedStreamSource?.streams.orEmpty()
+                    val preferredStream = selectPreferredAudioStream(
+                        streams = streams,
+                        preferredFormat = settings.streamingMusicFormat,
+                        preferredQuality = settings.streamingMusicQuality,
+                    )
+                    val activeStreamUrl = if (cachedStreamSource != null) cachedStream.url else null
+                    val activeStreamMatchesPreference = when {
+                        activeStreamUrl == null || preferredStream == null -> null
+                        else -> activeStreamUrl == normalizeManifestUrl(
+                            url = preferredStream.url,
+                            protocol = preferredStream.protocol,
+                        )
+                    }
+
+                    PlayerTrackDetails(
+                        track = track,
+                        matchedSource = source,
+                        streams = streams,
+                        preferredStream = preferredStream,
+                        activeStreamUrl = activeStreamUrl,
+                        activeStreamMatchesPreference = activeStreamMatchesPreference,
+                        localCacheEntry = localCacheEntry,
+                        error = when {
+                            source == null && localCacheEntry == null ->
+                                "No matched audio source is cached for this track."
+                            streams.isEmpty() && localCacheEntry == null ->
+                                "Stream details are not cached yet. Play the track first to load them."
+                            else -> null
+                        },
+                    )
+                }
+            }.onSuccess { details ->
+                _uiState.update { current ->
+                    if (current.trackDetails?.track?.id == track.id) {
+                        current.copy(trackDetails = details)
+                    } else current
+                }
+            }.onFailure { error ->
+                if (error is CancellationException) throw error
+                _uiState.update { current ->
+                    if (current.trackDetails?.track?.id == track.id) {
+                        current.copy(
+                            trackDetails = PlayerTrackDetails(
+                                track = track,
+                                isLoading = false,
+                                error = error.message ?: "Failed to load track details.",
+                            ),
+                        )
+                    } else current
+                }
+            }
+        }
+    }
+
+    fun dismissTrackDetails() {
+        trackDetailsJob?.cancel()
+        trackDetailsJob = null
+        _uiState.update { it.copy(trackDetails = null) }
+    }
+
+    override fun onCleared() {
+        sleepTimerJob?.cancel()
+        trackDetailsJob?.cancel()
+        super.onCleared()
+    }
+
+    companion object {
+        private const val MILLIS_PER_SECOND = 1_000L
+        private const val MILLIS_PER_MINUTE = 60_000L
+    }
+}

composeApp/src/commonTest/kotlin/dev/krtirtho/spotube/core/server/StreamingUrlRepositoryTest.kt

@@ -0,0 +1,434 @@
+package dev.krtirtho.spotube.core.server
+
+import dev.krtirtho.plugin_interfaces.plugin_apis.audio.AudioFormat
+import dev.krtirtho.plugin_interfaces.plugin_apis.audio.AudioQuality
+import dev.krtirtho.plugin_interfaces.plugin_apis.audio.AudioStream
+import dev.krtirtho.plugin_interfaces.plugin_apis.audio.StreamProtocol
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertNull
+import kotlin.test.assertSame
+
+/**
+ * Tests for the stream preference selection used by [StreamingUrlRepository].
+ *
+ * Ordering contract (best first):
+ * 1. Fewest codec/container mismatches against the preferred format.
+ * 2. Matching quality family (lossy vs lossless).
+ * 3. Closest bitrate / sample rate.
+ * 4. Closest channel count (lossless only).
+ * 5. First occurrence wins remaining ties.
+ */
+class StreamingUrlRepositoryTest {
+
+    // ---------- helpers ----------
+
+    private fun opusWebm() = AudioFormat(codec = "opus", container = "webm", qualities = emptyList())
+
+    private fun flac() = AudioFormat(codec = "flac", container = "flac", qualities = emptyList())
+
+    private fun lossy(
+        url: String,
+        bitrate: Int,
+        codec: String = "opus",
+        container: String = "webm",
+        protocol: StreamProtocol = StreamProtocol.PROGRESSIVE,
+    ) = AudioStream.Lossy(
+        url = url,
+        codec = codec,
+        container = container,
+        protocol = protocol,
+        bitrate = bitrate,
+    )
+
+    private fun lossless(
+        url: String,
+        sampleRate: Int,
+        channels: Int,
+        codec: String = "flac",
+        container: String = "flac",
+    ) = AudioStream.Lossless(
+        url = url,
+        codec = codec,
+        container = container,
+        sampleRate = sampleRate,
+        channels = channels,
+    )
+
+    private fun select(
+        streams: List<AudioStream>,
+        format: AudioFormat = opusWebm(),
+        quality: AudioQuality = AudioQuality.Lossy(256_000),
+    ) = selectPreferredAudioStream(streams, format, quality)
+
+    // ---------- empty / single ----------
+
+    @Test
+    fun `returns null when no streams are available`() {
+        assertNull(select(emptyList()))
+    }
+
+    @Test
+    fun `returns the only stream when exactly one is available`() {
+        val only = lossy("opus-128", 128_000)
+        assertSame(only, select(listOf(only)))
+    }
+
+    @Test
+    fun `does not mutate the input list`() {
+        val streams = mutableListOf(
+            lossy("opus-44", 44_000),
+            lossy("opus-256", 256_000),
+        )
+        val snapshot = streams.toList()
+
+        select(streams)
+
+        assertEquals(snapshot, streams)
+    }
+
+    // ---------- format priority ----------
+
+    @Test
+    fun `prefers an exact codec and container match over a closer quality in another format`() {
+        val otherFormat = lossy("aac-256", 256_000, codec = "aac", container = "mp4")
+        val preferredFormat = lossy("opus-128", 128_000)
+
+        val result = select(
+            streams = listOf(otherFormat, preferredFormat),
+            quality = AudioQuality.Lossy(256_000),
+        )
+
+        assertSame(preferredFormat, result)
+    }
+
+    @Test
+    fun `format matching ignores codec and container case`() {
+        val exact = lossy("opus-128", 128_000, codec = "OpUs", container = "WeBm")
+        val mismatch = lossy("aac-128", 128_000, codec = "aac", container = "mp4")
+
+        val result = select(
+            streams = listOf(mismatch, exact),
+            format = AudioFormat(codec = "OPUS", container = "WEBM", qualities = emptyList()),
+        )
+
+        assertSame(exact, result)
+    }
+
+    @Test
+    fun `a partial format match beats a full format mismatch regardless of bitrate`() {
+        val partial = lossy("opus-mp4-320", 320_000, container = "mp4")
+        val fullMismatch = lossy("aac-mp4-44", 44_000, codec = "aac", container = "mp4")
+
+        val result = select(
+            streams = listOf(fullMismatch, partial),
+            quality = AudioQuality.Lossy(44_000),
+        )
+
+        assertSame(partial, result)
+    }
+
+    @Test
+    fun `a one-field match beats a two-field mismatch`() {
+        val oneField = lossy("opus-ogg", 128_000, container = "ogg")
+        val twoFields = lossy("aac-mp4", 128_000, codec = "aac", container = "mp4")
+
+        val result = select(streams = listOf(twoFields, oneField))
+
+        assertSame(oneField, result)
+    }
+
+    @Test
+    fun `codec-only and container-only matches tie on format and are resolved by quality`() {
+        val codecOnly = lossy("opus-mp4-320", 320_000, container = "mp4")
+        val containerOnly = lossy("aac-webm-44", 44_000, codec = "aac", container = "webm")
+
+        val result = select(
+            streams = listOf(codecOnly, containerOnly),
+            quality = AudioQuality.Lossy(44_000),
+        )
+
+        assertSame(containerOnly, result)
+    }
+
+    @Test
+    fun `when nothing matches the format the closest quality is chosen`() {
+        val low = lossy("aac-128", 128_000, codec = "aac", container = "mp4")
+        val target = lossy("aac-256", 256_000, codec = "aac", container = "mp4")
+        val high = lossy("aac-320", 320_000, codec = "aac", container = "mp4")
+
+        val result = select(
+            streams = listOf(low, target, high),
+            quality = AudioQuality.Lossy(256_000),
+        )
+
+        assertSame(target, result)
+    }
+
+    @Test
+    fun `format match is prioritized over matching the quality family`() {
+        // Same format but wrong family vs. wrong format but correct family.
+        val sameFormatWrongFamily = lossless("opus-webm-flac", 48_000, 2, codec = "opus", container = "webm")
+        val wrongFormatRightFamily = lossy("aac-44", 44_000, codec = "aac", container = "mp4")
+
+        val result = select(
+            streams = listOf(wrongFormatRightFamily, sameFormatWrongFamily),
+            quality = AudioQuality.Lossy(44_000),
+        )
+
+        assertSame(sameFormatWrongFamily, result)
+    }
+
+    // ---------- lossy quality ----------
+
+    @Test
+    fun `exact lossy bitrate wins`() {
+        val low = lossy("opus-44", 44_000)
+        val exact = lossy("opus-128", 128_000)
+        val high = lossy("opus-256", 256_000)
+
+        val result = select(
+            streams = listOf(low, exact, high),
+            quality = AudioQuality.Lossy(128_000),
+        )
+
+        assertSame(exact, result)
+    }
+
+    @Test
+    fun `closest lower lossy bitrate wins`() {
+        val lower = lossy("opus-128", 128_000)
+        val higher = lossy("opus-320", 320_000)
+
+        val result = select(
+            streams = listOf(higher, lower),
+            quality = AudioQuality.Lossy(200_000),
+        )
+
+        assertSame(lower, result)
+    }
+
+    @Test
+    fun `closest higher lossy bitrate wins`() {
+        val lower = lossy("opus-44", 44_000)
+        val higher = lossy("opus-128", 128_000)
+
+        val result = select(
+            streams = listOf(lower, higher),
+            quality = AudioQuality.Lossy(100_000),
+        )
+
+        assertSame(higher, result)
+    }
+
+    @Test
+    fun `equidistant lossy bitrates pick the first occurrence`() {
+        val below = lossy("opus-96", 96_000)
+        val above = lossy("opus-104", 104_000)
+
+        assertSame(below, select(listOf(below, above), quality = AudioQuality.Lossy(100_000)))
+        assertSame(above, select(listOf(above, below), quality = AudioQuality.Lossy(100_000)))
+    }
+
+    @Test
+    fun `lossy preference prefers a lossy stream over lossless in the same format`() {
+        val losslessStream = lossless("opus-webm-lossless", 48_000, 2, codec = "opus", container = "webm")
+        val lossyStream = lossy("opus-256", 256_000)
+
+        val result = select(
+            streams = listOf(losslessStream, lossyStream),
+            quality = AudioQuality.Lossy(128_000),
+        )
+
+        assertSame(lossyStream, result)
+    }
+
+    @Test
+    fun `lossy distance does not overflow for extreme bitrates`() {
+        val min = lossy("opus-min", Int.MIN_VALUE)
+        val max = lossy("opus-max", Int.MAX_VALUE)
+
+        val result = select(
+            streams = listOf(min, max),
+            quality = AudioQuality.Lossy(Int.MAX_VALUE),
+        )
+
+        assertSame(max, result)
+    }
+
+    // ---------- lossless quality ----------
+
+    @Test
+    fun `exact lossless sample rate and channels wins`() {
+        val otherRate = lossless("flac-44", 44_100, 2)
+        val mono = lossless("flac-48-mono", 48_000, 1)
+        val exact = lossless("flac-48-stereo", 48_000, 2)
+
+        val result = select(
+            streams = listOf(otherRate, mono, exact),
+            format = flac(),
+            quality = AudioQuality.Lossless(sampleRate = 48_000, channels = 2),
+        )
+
+        assertSame(exact, result)
+    }
+
+    @Test
+    fun `closest lossless sample rate wins`() {
+        val near = lossless("flac-44", 44_100, 2)
+        val far = lossless("flac-96", 96_000, 2)
+
+        val result = select(
+            streams = listOf(far, near),
+            format = flac(),
+            quality = AudioQuality.Lossless(sampleRate = 48_000, channels = 2),
+        )
+
+        assertSame(near, result)
+    }
+
+    @Test
+    fun `lossless sample rate tie is broken by channel count`() {
+        val mono = lossless("flac-44-mono", 44_100, 1)
+        val stereo = lossless("flac-44-stereo", 44_100, 2)
+
+        val result = select(
+            streams = listOf(mono, stereo),
+            format = flac(),
+            quality = AudioQuality.Lossless(sampleRate = 48_000, channels = 2),
+        )
+
+        assertSame(stereo, result)
+    }
+
+    @Test
+    fun `lossless preference prefers a lossless stream over lossy in the same format`() {
+        val lossyStream = lossy("flac-flac-lossy", 128_000, codec = "flac", container = "flac")
+        val losslessStream = lossless("flac-44", 44_100, 2)
+
+        val result = select(
+            streams = listOf(lossyStream, losslessStream),
+            format = flac(),
+            quality = AudioQuality.Lossless(sampleRate = 48_000, channels = 2),
+        )
+
+        assertSame(losslessStream, result)
+    }
+
+    // ---------- quality-family fallbacks ----------
+
+    @Test
+    fun `lossy preference with only lossless streams still returns the first stream`() {
+        val first = lossless("flac-44", 44_100, 2)
+        val second = lossless("flac-48", 48_000, 2)
+
+        val result = select(
+            streams = listOf(first, second),
+            format = flac(),
+            quality = AudioQuality.Lossy(256_000),
+        )
+
+        assertSame(first, result)
+    }
+
+    @Test
+    fun `lossless preference with only lossy streams still returns the first stream`() {
+        val first = lossy("opus-128", 128_000)
+        val second = lossy("opus-320", 320_000)
+
+        val result = select(
+            streams = listOf(first, second),
+            quality = AudioQuality.Lossless(sampleRate = 48_000, channels = 2),
+        )
+
+        assertSame(first, result)
+    }
+
+    // ---------- degenerate / orthogonal inputs ----------
+
+    @Test
+    fun `empty preferred codec and container fall back to quality`() {
+        val low = lossy("opus-44", 44_000)
+        val target = lossy("opus-256", 256_000)
+
+        val result = select(
+            streams = listOf(low, target),
+            format = AudioFormat(codec = "", container = "", qualities = emptyList()),
+            quality = AudioQuality.Lossy(256_000),
+        )
+
+        assertSame(target, result)
+    }
+
+    @Test
+    fun `protocol does not influence selection`() {
+        val progressive = lossy("a", 128_000, protocol = StreamProtocol.PROGRESSIVE)
+        val dash = lossy("b", 128_000, protocol = StreamProtocol.DASH)
+        val hls = lossy("c", 128_000, protocol = StreamProtocol.HLS)
+
+        val result = select(streams = listOf(progressive, dash, hls))
+
+        assertSame(progressive, result)
+    }
+
+    @Test
+    fun `selection is stable across repeated calls`() {
+        val streams = listOf(
+            lossy("opus-44", 44_000),
+            lossy("opus-128", 128_000),
+            lossy("opus-256", 256_000),
+        )
+
+        val first = select(streams, quality = AudioQuality.Lossy(100_000))
+        val second = select(streams, quality = AudioQuality.Lossy(100_000))
+
+        assertSame(first, second)
+    }
+
+    // ---------- normalizeManifestUrl ----------
+
+    @Test
+    fun `absolute http urls are returned unchanged`() {
+        val url = "http://example.com/audio.mp3"
+        assertEquals(url, normalizeManifestUrl(url, StreamProtocol.PROGRESSIVE))
+    }
+
+    @Test
+    fun `absolute https urls are returned unchanged for every protocol`() {
+        val url = "https://example.com/manifest.m3u8"
+        assertEquals(url, normalizeManifestUrl(url, StreamProtocol.HLS))
+        assertEquals(url, normalizeManifestUrl(url, StreamProtocol.DASH))
+        assertEquals(url, normalizeManifestUrl(url, StreamProtocol.PROGRESSIVE))
+    }
+
+    @Test
+    fun `relative hls manifest paths are resolved against the youtube origin`() {
+        assertEquals(
+            "https://www.youtube.com/watch?v=abc",
+            normalizeManifestUrl("/watch?v=abc", StreamProtocol.HLS),
+        )
+    }
+
+    @Test
+    fun `relative dash manifest paths are resolved against the youtube origin`() {
+        assertEquals(
+            "https://www.youtube.com/watch?v=abc",
+            normalizeManifestUrl("/watch?v=abc", StreamProtocol.DASH),
+        )
+    }
+
+    @Test
+    fun `relative progressive urls are returned unchanged`() {
+        assertEquals(
+            "/watch?v=abc",
+            normalizeManifestUrl("/watch?v=abc", StreamProtocol.PROGRESSIVE),
+        )
+    }
+
+    @Test
+    fun `empty url is handled without throwing`() {
+        assertEquals("", normalizeManifestUrl("", StreamProtocol.PROGRESSIVE))
+        assertEquals("https://www.youtube.com", normalizeManifestUrl("", StreamProtocol.DASH))
+        assertEquals("https://www.youtube.com", normalizeManifestUrl("", StreamProtocol.HLS))
+    }
+}

plugin_interfaces/src/commonMain/kotlin/dev/krtirtho/plugin_interfaces/plugin_apis/audio/AudioModels.kt

@@ -28,6 +28,7 @@ data class AudioFormat(
     val qualities: List<AudioQuality>
 )
 
+@Serializable
 sealed interface AudioQuality {
     @Serializable
     @SerialName("lossy")

plugin_interfaces/src/commonTest/kotlin/dev/krtirtho/plugin_interfaces/plugin_apis/audio/AudioQualitySerializationTest.kt

@@ -0,0 +1,28 @@
+package dev.krtirtho.plugin_interfaces.plugin_apis.audio
+
+import kotlinx.serialization.json.Json
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class AudioQualitySerializationTest {
+    @Test
+    fun `audio format serializes sealed quality variants`() {
+        val formats = listOf(
+            AudioFormat(
+                codec = "opus",
+                container = "webm",
+                qualities = listOf(AudioQuality.Lossy(bitrate = 256_000)),
+            ),
+            AudioFormat(
+                codec = "flac",
+                container = "flac",
+                qualities = listOf(AudioQuality.Lossless(sampleRate = 48_000, channels = 2)),
+            ),
+        )
+
+        val encoded = Json.encodeToString(formats)
+        val decoded = Json.decodeFromString<List<AudioFormat>>(encoded)
+
+        assertEquals(formats, decoded)
+    }
+}