feat: port upstream PRs #3132, #3170, #3150, #3092, #3134, #3147

Co-Authored-By: pgwiz <pgwiz@users.noreply.github.com>

CHANGELOG.md

@@ -2,7 +2,17 @@
 
 ## [Unreleased]
 
+### Features
+- **audioplayer/ios**: Implement `IosMediaSession` with `AVAudioSession`, `MPNowPlayingInfoCenter`, and `MPRemoteCommandCenter` for lock-screen / Control Center media controls and background audio playback (PR #3170).
+- **audioplayer/ios**: Enable direct streaming resolution for iOS playback in `DeviceAudioPlayerQueue.toMediaItem` (PR #3170).
+- **audioplayer/DeviceAudioPlayerQueue**: Implement complete 4-tier endless playback recommendation cascade: metadata recommendations, native YouTube radio mix, album tracks, and artist top tracks (PR #3092, PR #3134).
+- **plugin/PluginManager**: Auto-select vacant ability slots on plugin installation and recover fallback providers on plugin removal (PR #3147).
+
 ### Fixes
+- **build/android**: Switch `desugar_jdk_libs` to `com.android.tools:desugar_jdk_libs_nio` to resolve Android 9-12 `NoSuchMethodError: java.net.URLEncoder.encode` (PR #3132).
+- **server/StreamProxy**: Harden YouTube/GoogleVideo proxy streaming against HTTP 403 Forbidden by inspecting client parameter `c` (`ANDROID`, `IOS`, `VISIONOS`), injecting matching mobile User-Agents, and stripping `Origin` and `Referer` on mobile streams (PR #3150).
+- **downloads/DownloadManager**: Prevent HTTP 403 Forbidden on YouTube audio downloads by injecting matching client User-Agents and using `Range: bytes=0-0` byte-range probes instead of bare `HEAD` requests (PR #3150).
+- **server/StreamingUrlRepository**: Evict stale cached track sources from `MatchedTracksRepository` when cached source resolution fails before falling back to fresh track lookups (PR #3092, PR #3134).
 - **server/StreamProxy**: Prevent GoogleVideo CDN HTTP 403 Forbidden by injecting `Referer: https://www.youtube.com/`, `Origin: https://www.youtube.com`, and browser `User-Agent` headers on `googlevideo.com`, `youtube.com`, and `youtu.be` proxy requests, preserving stream range headers (`Range`, `If-Range`) without header duplication, and filtering hop-by-hop headers.
 - **newpipe/RealNewPipeAudioAPI**: Fix YouTube video ID extraction when `track.externalUri` contains YouTube URLs (`v=`, `youtu.be`, `/embed/`, `/shorts/`, with trailing slash/query/fragment support) instead of passing raw Spotify track IDs to video info lookups.
 - **newpipe/RealNewPipeAudioAPI**: Improve track matching and scoring for Topic channels, VEVO uploads, and official variants with relaxed duration bins, and guarantee top relevance search result is prioritized at index 0 when confidence scoring yields no candidates $\ge 0.3$.

composeApp/src/commonMain/kotlin/org/spotube/spotube/core/audioplayer/DeviceAudioPlayerQueue.kt

@@ -42,6 +42,10 @@ import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
 import org.koin.core.component.KoinComponent
+import org.koin.core.component.inject
+import org.spotube.spotube.PlatformType
+import org.spotube.spotube.core.server.StreamingUrlRepository
+import org.spotube.spotube.getPlatform
 import kotlin.random.Random
 import kotlin.time.Duration.Companion.milliseconds
 
@@ -53,6 +57,7 @@ class DeviceAudioPlayerQueue(
     private val blacklistRepository: BlacklistRepository) : AudioPlayerQueue, KoinComponent {
 
     private val logger by injectLogger<DeviceAudioPlayerQueue>()
+    private val streamingUrlRepository by inject<StreamingUrlRepository>()
 
     private val scope = CoroutineScope(Dispatchers.IO + SupervisorJob())
 
@@ -401,9 +406,48 @@ class DeviceAudioPlayerQueue(
             }
         }
 
+        if (recommendations.isEmpty() && metadataService != null) {
+            val albumId = seedTracks.mapNotNull { it.track.album?.id }.firstOrNull { it.isNotBlank() }
+            if (!albumId.isNullOrBlank()) {
+                logger.i { "Endless playback: radio mix unavailable or empty, falling back to album tracks for album $albumId" }
+                val albumTracks = runCatching {
+                    metadataService.use {
+                        metadataAlbumAPI.getAlbumTracks(albumId).items
+                    }
+                }.getOrDefault(emptyList())
+
+                val existingTrackIds = queue.filterIsInstance<QueueEntry.StreamingTrack>().map { it.track.id }.toSet()
+                val newAlbumTracks = albumTracks.filter { it.id !in existingTrackIds }
+                if (newAlbumTracks.isNotEmpty()) {
+                    logger.i { "Endless playback: got ${newAlbumTracks.size} remaining album tracks for album $albumId" }
+                    recommendations = newAlbumTracks
+                }
+            }
+        }
+
+        if (recommendations.isEmpty() && metadataService != null) {
+            logger.i { "Endless playback: album tracks unavailable or empty, falling back to artist top tracks" }
+            val existingTrackIds = queue.filterIsInstance<QueueEntry.StreamingTrack>().map { it.track.id }.toSet()
+            val artistIds = seedTracks.flatMap { it.track.artists }.map { it.id }.filter { it.isNotBlank() }.distinct()
+            for (artistId in artistIds) {
+                val topTracks = runCatching {
+                    metadataService.use {
+                        metadataArtistAPI.getArtistTop10Tracks(artistId)
+                    }
+                }.getOrDefault(emptyList())
+
+                val newTracks = topTracks.filter { it.id !in existingTrackIds }
+                if (newTracks.isNotEmpty()) {
+                    logger.i { "Endless playback: got ${newTracks.size} top tracks for artist $artistId" }
+                    recommendations = newTracks
+                    break
+                }
+            }
+        }
+
         try {
             if (recommendations.isEmpty()) {
-                logger.w { "Endless playback: no recommendations or radio mix tracks found" }
+                logger.w { "Endless playback: no recommendations, radio mix, album tracks, or artist top tracks found" }
                 isFetchingRecommendations = false
                 return
             }
@@ -517,7 +561,25 @@ class DeviceAudioPlayerQueue(
     private suspend fun QueueEntry.toMediaItem(): MediaItem? {
         return when (this) {
             is QueueEntry.StreamingTrack -> {
-                val resolvedUrl = url.ifBlank { buildStreamingUrl(track.id, protocol) }
+                val isIos = getPlatform().type == PlatformType.IOS
+                val requiresIosResolution = isIos && (
+                    url.isBlank() ||
+                        url.startsWith("http://127.0.0.1") ||
+                        url.startsWith("https://127.0.0.1") ||
+                        url.startsWith("http://[::1]") ||
+                        url.startsWith("https://[::1]") ||
+                        url.startsWith("http://localhost") ||
+                        url.startsWith("https://localhost"))
+                val resolvedStream = if (requiresIosResolution) {
+                    streamingUrlRepository.resolveStreamInfo(track)
+                } else {
+                    null
+                }
+                val resolvedUrl = if (requiresIosResolution) {
+                    resolvedStream?.url ?: buildStreamingUrl(track.id, protocol)
+                } else {
+                    url.ifBlank { buildStreamingUrl(track.id, protocol) }
+                }
                 if (resolvedUrl.isBlank()) return null
                 MediaItem(
                     title = track.title,
@@ -526,7 +588,7 @@ class DeviceAudioPlayerQueue(
                     duration = track.durationMs.milliseconds,
                     coverURL = artworkUrl.orEmpty(),
                     url = resolvedUrl,
-                    protocol = protocol)
+                    protocol = resolvedStream?.protocol ?: protocol)
             }
 
             is QueueEntry.LocalTrack -> {

composeApp/src/commonMain/kotlin/org/spotube/spotube/core/server/MatchTracksRepository.kt

@@ -43,6 +43,7 @@ data class PluginTaggedAudioSource(
 interface TrackSourceRepository {
     suspend fun getTrackSource(track: MetadataTrack, pluginId: String): AudioSource.Basic?
     suspend fun saveTrackSource(track: MetadataTrack, source: AudioSource.Basic, pluginId: String)
+    suspend fun deleteTrackSource(track: MetadataTrack, pluginId: String)
 }
 
 class MatchedTracksRepository(private val database: Database) : TrackSourceRepository {
@@ -72,4 +73,19 @@ class MatchedTracksRepository(private val database: Database) : TrackSourceRepos
                 Json.encodeToString(PluginTaggedAudioSource(pluginId, source))
         }
     }
+
+    override suspend fun deleteTrackSource(track: MetadataTrack, pluginId: String) {
+        database.matchedTracksDataStore.edit { prefs ->
+            val key = stringPreferencesKey(track.id)
+            val json = prefs[key] ?: return@edit
+            val tagged = try {
+                Json.decodeFromString<PluginTaggedAudioSource>(json)
+            } catch (_: Exception) {
+                null
+            }
+            if (tagged == null || tagged.pluginId == pluginId) {
+                prefs.remove(key)
+            }
+        }
+    }
 }

composeApp/src/commonMain/kotlin/org/spotube/spotube/core/server/StreamProxy.kt

@@ -76,6 +76,12 @@ internal class StreamProxy(
         private const val YOUTUBE_REFERER = "https://www.youtube.com/"
         private const val BROWSER_USER_AGENT =
             "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36"
+        private const val ANDROID_USER_AGENT =
+            "com.google.android.youtube/20.10.38 (Linux; U; Android 11) gzip"
+        private const val IOS_USER_AGENT =
+            "com.google.ios.youtube/20.10.4 (iPhone16,2; U; CPU iOS 18_3_2 like Mac OS X;)"
+        private const val VISIONOS_USER_AGENT =
+            "com.google.visionos.youtube/1.04(RealityDevice17,1; U; CPU visionOS 26_6_0 like Mac OS X; US)"
     }
 
     private val fileSystem = FileSystem.SYSTEM
@@ -599,9 +605,31 @@ internal class StreamProxy(
         call.forwardRequestHeaderIfPresent(builder.headers, HttpHeaders.Accept)
 
         if (isYouTubeOrGoogleVideo(targetUrl)) {
-            builder.headers[HttpHeaders.Referrer] = YOUTUBE_REFERER
+            val clientParam = runCatching { Url(targetUrl).parameters["c"]?.uppercase() }.getOrNull()
-            builder.headers[HttpHeaders.Origin] = "https://www.youtube.com"
+                ?: Regex("""[?&]c=([^&#]+)""").find(targetUrl)?.groupValues?.get(1)?.uppercase()
-            builder.headers[HttpHeaders.UserAgent] = BROWSER_USER_AGENT
+
+            when (clientParam) {
+                "ANDROID" -> {
+                    builder.headers[HttpHeaders.UserAgent] = ANDROID_USER_AGENT
+                    builder.headers.remove(HttpHeaders.Referrer)
+                    builder.headers.remove(HttpHeaders.Origin)
+                }
+                "IOS" -> {
+                    builder.headers[HttpHeaders.UserAgent] = IOS_USER_AGENT
+                    builder.headers.remove(HttpHeaders.Referrer)
+                    builder.headers.remove(HttpHeaders.Origin)
+                }
+                "VISIONOS" -> {
+                    builder.headers[HttpHeaders.UserAgent] = VISIONOS_USER_AGENT
+                    builder.headers.remove(HttpHeaders.Referrer)
+                    builder.headers.remove(HttpHeaders.Origin)
+                }
+                else -> {
+                    builder.headers[HttpHeaders.Referrer] = YOUTUBE_REFERER
+                    builder.headers[HttpHeaders.Origin] = "https://www.youtube.com"
+                    builder.headers[HttpHeaders.UserAgent] = BROWSER_USER_AGENT
+                }
+            }
         } else {
             call.forwardRequestHeaderIfPresent(builder.headers, HttpHeaders.UserAgent)
             call.forwardRequestHeaderIfPresent(builder.headers, HttpHeaders.Referrer)

composeApp/src/commonMain/kotlin/org/spotube/spotube/core/server/StreamingUrlRepository.kt

@@ -186,6 +186,7 @@ class StreamingUrlRepository(
             }
 
             logger.d { "Cached source did not provide a stream for track $trackId; falling back to track lookup" }
+            matchedTracksRepository.deleteTrackSource(track, audioPlugin.pluginId)
         }
 
         logger.d { "Attempting stream resolution for track $trackId using track lookup" }

composeApp/src/commonMain/kotlin/org/spotube/spotube/modules/downloads/DownloadManager.kt

@@ -34,8 +34,10 @@ import io.ktor.client.request.headers
 import io.ktor.client.statement.bodyAsChannel
 import io.ktor.http.HttpHeaders
 import io.ktor.http.HttpStatusCode
+import io.ktor.http.Url
 import io.ktor.http.contentLength
 import io.ktor.http.isSuccess
+import io.ktor.utils.io.discard
 import io.ktor.utils.io.readRemaining
 import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.CoroutineScope
@@ -95,6 +97,15 @@ class DownloadManager(
         const val MAX_CONCURRENT_DOWNLOADS = 4
         private const val SEGMENT_COUNT = 4
         private const val CHUNK_SIZE = 256 * 1024
+        private const val YOUTUBE_REFERER = "https://www.youtube.com/"
+        private const val BROWSER_USER_AGENT =
+            "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36"
+        private const val ANDROID_USER_AGENT =
+            "com.google.android.youtube/20.10.38 (Linux; U; Android 11) gzip"
+        private const val IOS_USER_AGENT =
+            "com.google.ios.youtube/20.10.4 (iPhone16,2; U; CPU iOS 18_3_2 like Mac OS X;)"
+        private const val VISIONOS_USER_AGENT =
+            "com.google.visionos.youtube/1.04(RealityDevice17,1; U; CPU visionOS 26_6_0 like Mac OS X; US)"
     }
 
     private val logger = Logger.withTag("DownloadManager")
@@ -362,6 +373,7 @@ class DownloadManager(
             headers {
                 append(HttpHeaders.Range, "bytes=${segment.start}-${segment.end}")
             }
+            applyClientHeaders(url)
         }
         logger.d {
             "[Download ${item.id}] segment ${segment.index} bytes=${segment.start}-${segment.end} -> " +
@@ -398,7 +410,9 @@ class DownloadManager(
         downloadDir: Path) {
         val tempFile = tempDir / "${item.id}.tmp"
 
-        val response = httpClient.get(url)
+        val response = httpClient.get(url) {
+            applyClientHeaders(url)
+        }
         val totalSize = response.contentLength() ?: 0L
         logger.i {
             "[Download ${item.id}] GET -> HTTP ${response.status.value} " +
@@ -442,21 +456,30 @@ class DownloadManager(
 
     private suspend fun probeUrl(id: String, url: String): Pair<Long, Boolean> {
         return try {
-            val response = httpClient.head(url)
+            val response = httpClient.get(url) {
-            val contentLength = response.contentLength() ?: 0L
+                headers {
+                    append(HttpHeaders.Range, "bytes=0-0")
+                }
+                applyClientHeaders(url)
+            }
+            val contentRange = response.headers[HttpHeaders.ContentRange]
+            val totalFromContentRange = contentRange?.substringAfterLast('/')?.trim()?.toLongOrNull()
+            val contentLength = totalFromContentRange ?: response.contentLength() ?: 0L
             val acceptRanges = response.headers[HttpHeaders.AcceptRanges]
-            val supportsRanges = acceptRanges?.equals("bytes", ignoreCase = true) == true
+            val supportsRanges = response.status == HttpStatusCode.PartialContent ||
+                acceptRanges?.equals("bytes", ignoreCase = true) == true
             val contentType = response.headers[HttpHeaders.ContentType]
             logger.i {
-                "[Download $id] HEAD -> HTTP ${response.status.value} type=$contentType " +
+                "[Download $id] PROBE (bytes=0-0) -> HTTP ${response.status.value} type=$contentType " +
-                    "length=$contentLength acceptRanges=$acceptRanges"
+                    "length=$contentLength contentRange=$contentRange acceptRanges=$acceptRanges"
             }
+            runCatching { response.bodyAsChannel().discard() }
             rejectVideo(id, contentType)
             Pair(contentLength, supportsRanges)
         } catch (e: DownloadException) {
             throw e
         } catch (e: Exception) {
-            logger.w(e) { "[Download $id] HEAD request failed, falling back to single connection" }
+            logger.w(e) { "[Download $id] PROBE request failed, falling back to single connection" }
             Pair(0L, false)
         }
     }
@@ -472,6 +495,46 @@ class DownloadManager(
         }
     }
 
+    private fun isYouTubeOrGoogleVideo(url: String): Boolean {
+        val host = runCatching { Url(url).host.lowercase() }.getOrNull() ?: ""
+        return host.endsWith("googlevideo.com") ||
+            host.endsWith("youtube.com") ||
+            host.endsWith("youtu.be") ||
+            url.contains("googlevideo.com", ignoreCase = true) ||
+            url.contains("youtube.com", ignoreCase = true) ||
+            url.contains("youtu.be", ignoreCase = true)
+    }
+
+    private fun io.ktor.client.request.HttpRequestBuilder.applyClientHeaders(targetUrl: String) {
+        if (isYouTubeOrGoogleVideo(targetUrl)) {
+            val clientParam = runCatching { Url(targetUrl).parameters["c"]?.uppercase() }.getOrNull()
+                ?: Regex("""[?&]c=([^&#]+)""").find(targetUrl)?.groupValues?.get(1)?.uppercase()
+
+            when (clientParam) {
+                "ANDROID" -> {
+                    headers[HttpHeaders.UserAgent] = ANDROID_USER_AGENT
+                    headers.remove(HttpHeaders.Referrer)
+                    headers.remove(HttpHeaders.Origin)
+                }
+                "IOS" -> {
+                    headers[HttpHeaders.UserAgent] = IOS_USER_AGENT
+                    headers.remove(HttpHeaders.Referrer)
+                    headers.remove(HttpHeaders.Origin)
+                }
+                "VISIONOS" -> {
+                    headers[HttpHeaders.UserAgent] = VISIONOS_USER_AGENT
+                    headers.remove(HttpHeaders.Referrer)
+                    headers.remove(HttpHeaders.Origin)
+                }
+                else -> {
+                    headers[HttpHeaders.Referrer] = YOUTUBE_REFERER
+                    headers[HttpHeaders.Origin] = "https://www.youtube.com"
+                    headers[HttpHeaders.UserAgent] = BROWSER_USER_AGENT
+                }
+            }
+        }
+    }
+
     private fun logResolvedStream(item: DownloadItem, info: StreamInfo) {
         val settings = settingsRepository.userSettings.value
         val wanted = settings.downloadMusicFormat

composeApp/src/commonMain/kotlin/org/spotube/spotube/modules/plugin/PluginManager.kt

@@ -579,7 +579,12 @@ class PluginManager(
             val updatedSelectedPlugins =
                 currentState.selectedPlugins.mapValues { (_, selectedPlugin) ->
                     if (selectedPlugin.id == plugin.id) plugin else selectedPlugin
+                }.toMutableMap()
+            for (ability in plugin.abilities) {
+                if (updatedSelectedPlugins[ability] == null) {
+                    updatedSelectedPlugins[ability] = plugin
                 }
+            }
             val newState = PluginManagerStates.Data(
                 plugins = updatedPlugins,
                 selectedPlugins = updatedSelectedPlugins,
@@ -599,7 +604,15 @@ class PluginManager(
         if (currentState is PluginManagerStates.Data) {
             val updatedPlugins = currentState.plugins.filterNot { it.id == plugin.id }
             val updatedSelectedPlugins =
-                currentState.selectedPlugins.filterValues { it.id != plugin.id }
+                currentState.selectedPlugins.filterValues { it.id != plugin.id }.toMutableMap()
+            for (ability in plugin.abilities) {
+                if (updatedSelectedPlugins[ability] == null) {
+                    val fallback = updatedPlugins.firstOrNull { ability in it.abilities }
+                    if (fallback != null) {
+                        updatedSelectedPlugins[ability] = fallback
+                    }
+                }
+            }
             val newState = PluginManagerStates.Data(
                 plugins = updatedPlugins,
                 selectedPlugins = updatedSelectedPlugins,

composeApp/src/commonTest/kotlin/org/spotube/spotube/core/server/StreamingUrlRepositoryBehaviorTest.kt

@@ -447,6 +447,23 @@ class StreamingUrlRepositoryBehaviorTest {
         assertEquals("https://example.com/fresh.opus", info?.url)
         assertEquals(1, plugin.audioAPI.getStreamsOfAudioSourceCallCount)
         assertEquals(1, plugin.audioAPI.getStreamsByTrackCallCount)
+        assertEquals(1, h.matchedTracksRepository.deleteCallCount)
+    }
+
+    @Test
+    fun `deletes cached track source when cached source fails to provide a stream`() = runTest {
+        val h = Harness()
+        val t = track("t1")
+        val plugin = h.selectPlugin("pluginA")
+        h.matchedTracksRepository.seed(t, basicSource("stale-1"), pluginId = "pluginA")
+        plugin.audioAPI.onGetStreamsOfAudioSource = { emptyList() }
+        plugin.audioAPI.onGetStreamsByTrack = { emptyList() }
+
+        val info = h.repository.resolveStreamInfo(t)
+
+        assertNull(info)
+        assertEquals(1, h.matchedTracksRepository.deleteCallCount)
+        assertNull(h.matchedTracksRepository.rawEntryFor(t.id))
     }
 
     @Test

composeApp/src/commonTest/kotlin/org/spotube/spotube/core/server/StreamingUrlRepositoryFakes.kt

@@ -68,6 +68,7 @@ class FakeTrackSourceRepository : TrackSourceRepository {
     private val store = mutableMapOf<String, PluginTaggedAudioSource>()
     var getCallCount = 0
     var saveCallCount = 0
+    var deleteCallCount = 0
 
     override suspend fun getTrackSource(track: MetadataTrack, pluginId: String): AudioSource.Basic? {
         getCallCount++
@@ -81,6 +82,14 @@ class FakeTrackSourceRepository : TrackSourceRepository {
         store[track.id] = PluginTaggedAudioSource(pluginId, source)
     }
 
+    override suspend fun deleteTrackSource(track: MetadataTrack, pluginId: String) {
+        deleteCallCount++
+        val tagged = store[track.id] ?: return
+        if (tagged.pluginId == pluginId) {
+            store.remove(track.id)
+        }
+    }
+
     fun rawEntryFor(trackId: String): PluginTaggedAudioSource? = store[trackId]
 
     fun seed(track: MetadataTrack, source: AudioSource.Basic, pluginId: String) {

composeApp/src/iosMain/kotlin/org/spotube/spotube/core/audioplayer/AudioPlayer.ios.kt

@@ -62,6 +62,7 @@ actual class AudioPlayer actual constructor(context: Any) : AudioPlayerInterface
 
     private val avPlayer: AVPlayer = AVPlayer()
     private val scope = CoroutineScope(SupervisorJob() + Dispatchers.Default)
+    private val mediaSession = IosMediaSession()
 
     private var disposed = false
 
@@ -97,6 +98,13 @@ actual class AudioPlayer actual constructor(context: Any) : AudioPlayerInterface
     private var lastTimeControlStatus: AVPlayerTimeControlStatus? = null
 
     init {
+        mediaSession.configure(
+            onPlay = { scope.launch { play() } },
+            onPause = { scope.launch { pause() } },
+            onSeek = { seconds -> scope.launch { seekTo(seconds.seconds) } },
+            onNext = { scope.launch { skipToNext() } },
+            onPrevious = { scope.launch { skipToPrevious() } })
+
         avPlayer.addPeriodicTimeObserverForInterval(
             interval = CMTimeMake(1, 4),
             queue = null
@@ -115,6 +123,11 @@ actual class AudioPlayer actual constructor(context: Any) : AudioPlayerInterface
 //                        val range = loadedRanges.objectAtIndex(0u)
 //                    }
                 }
+                mediaSession.update(
+                    item = _currentMediaItem.value,
+                    positionSeconds = seconds,
+                    durationSeconds = _duration.value.inWholeMilliseconds / 1000.0,
+                    isPlaying = avPlayer.timeControlStatus == AVPlayerTimeControlStatusPlaying)
             }
         }
 
@@ -159,6 +172,7 @@ actual class AudioPlayer actual constructor(context: Any) : AudioPlayerInterface
     }
 
     actual override suspend fun play() {
+        mediaSession.activate()
         avPlayer.play()
     }
 
@@ -170,6 +184,12 @@ actual class AudioPlayer actual constructor(context: Any) : AudioPlayerInterface
         avPlayer.pause()
         avPlayer.seekToTime(CMTimeMake(0, 1))
         _playerState.tryEmit(PlayerState.IDLE)
+        mediaSession.deactivate()
+        mediaSession.update(
+            item = _currentMediaItem.value,
+            positionSeconds = 0.0,
+            durationSeconds = _duration.value.inWholeMilliseconds / 1000.0,
+            isPlaying = false)
     }
 
     actual override suspend fun seekTo(position: Duration) {
@@ -220,9 +240,14 @@ actual class AudioPlayer actual constructor(context: Any) : AudioPlayerInterface
 
         avPlayer.replaceCurrentItemWithPlayerItem(avItem)
         _currentMediaItem.tryEmit(item)
+        mediaSession.update(
+            item = item,
+            positionSeconds = 0.0,
+            durationSeconds = item.duration.inWholeMilliseconds / 1000.0,
+            isPlaying = false)
 
         if (autoPlay) {
-            avPlayer.play()
+            play()
         }
     }
 
@@ -277,7 +302,7 @@ actual class AudioPlayer actual constructor(context: Any) : AudioPlayerInterface
             if (avItem != null) {
                 avPlayer.replaceCurrentItemWithPlayerItem(avItem)
                 _currentMediaItem.tryEmit(nextItem)
-                avPlayer.play()
+                play()
             }
         }
     }
@@ -293,7 +318,7 @@ actual class AudioPlayer actual constructor(context: Any) : AudioPlayerInterface
             if (avItem != null) {
                 avPlayer.replaceCurrentItemWithPlayerItem(avItem)
                 _currentMediaItem.tryEmit(prevItem)
-                avPlayer.play()
+                play()
             }
         }
     }
@@ -327,6 +352,8 @@ actual class AudioPlayer actual constructor(context: Any) : AudioPlayerInterface
         disposed = true
         avPlayer.pause()
         avPlayer.replaceCurrentItemWithPlayerItem(null)
+        mediaSession.deactivate()
+        mediaSession.clear()
         currentPlaylist.clear()
         urlIndexMap.clear()
 

composeApp/src/iosMain/kotlin/org/spotube/spotube/core/audioplayer/IosMediaSession.kt

@@ -0,0 +1,184 @@
+/*
+ * 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/>.
+ */
+
+@file:OptIn(ExperimentalForeignApi::class)
+
+package org.spotube.spotube.core.audioplayer
+
+import kotlinx.cinterop.ExperimentalForeignApi
+import platform.AVFAudio.AVAudioSession
+import platform.AVFAudio.AVAudioSessionCategoryPlayback
+import platform.AVFAudio.AVAudioSessionModeDefault
+import platform.Foundation.NSDictionary
+import platform.Foundation.NSMutableDictionary
+import platform.Foundation.NSNotificationCenter
+import platform.Foundation.NSOperationQueue
+import platform.MediaPlayer.MPChangePlaybackPositionCommandEvent
+import platform.MediaPlayer.MPMediaItemPropertyAlbumTitle
+import platform.MediaPlayer.MPMediaItemPropertyArtist
+import platform.MediaPlayer.MPMediaItemPropertyPlaybackDuration
+import platform.MediaPlayer.MPMediaItemPropertyTitle
+import platform.MediaPlayer.MPNowPlayingInfoCenter
+import platform.MediaPlayer.MPNowPlayingInfoPropertyElapsedPlaybackTime
+import platform.MediaPlayer.MPNowPlayingInfoPropertyPlaybackRate
+import platform.MediaPlayer.MPRemoteCommand
+import platform.MediaPlayer.MPRemoteCommandCenter
+import platform.MediaPlayer.MPRemoteCommandHandlerStatusCommandFailed
+import platform.MediaPlayer.MPRemoteCommandHandlerStatusSuccess
+
+internal class IosMediaSession {
+    private val audioSession = AVAudioSession.sharedInstance()
+    private val nowPlayingInfoCenter = MPNowPlayingInfoCenter.defaultCenter()
+    private val remoteCommandCenter = MPRemoteCommandCenter.sharedCommandCenter()
+
+    private var configured = false
+    private val notificationCenter = NSNotificationCenter.defaultCenter()
+    private val notificationTokens = mutableListOf<Any>()
+    private val remoteCommandTokens = mutableListOf<Pair<MPRemoteCommand, Any>>()
+    private var onPlay: (() -> Unit)? = null
+    private var onPause: (() -> Unit)? = null
+    private var onSeek: ((Double) -> Unit)? = null
+    private var onNext: (() -> Unit)? = null
+    private var onPrevious: (() -> Unit)? = null
+
+    fun configure(
+        onPlay: () -> Unit,
+        onPause: () -> Unit,
+        onSeek: (Double) -> Unit,
+        onNext: () -> Unit,
+        onPrevious: () -> Unit
+    ) {
+        this.onPlay = onPlay
+        this.onPause = onPause
+        this.onSeek = onSeek
+        this.onNext = onNext
+        this.onPrevious = onPrevious
+
+        if (configured) return
+        configured = true
+
+        audioSession.setCategory(
+            category = AVAudioSessionCategoryPlayback,
+            mode = AVAudioSessionModeDefault,
+            options = 0u,
+            error = null)
+        registerAudioSessionNotifications()
+        registerRemoteCommands()
+    }
+
+    fun activate() {
+        audioSession.setActive(true, error = null)
+    }
+
+    fun deactivate() {
+        audioSession.setActive(false, error = null)
+    }
+
+    fun update(
+        item: MediaItem?,
+        positionSeconds: Double,
+        durationSeconds: Double,
+        isPlaying: Boolean
+    ) {
+        if (item == null) {
+            nowPlayingInfoCenter.nowPlayingInfo = null
+            return
+        }
+
+        val info = NSMutableDictionary()
+        info.setObject(item.title, forKey = MPMediaItemPropertyTitle)
+        info.setObject(item.artist, forKey = MPMediaItemPropertyArtist)
+        item.album.takeIf { it.isNotBlank() }?.let {
+            info.setObject(it, forKey = MPMediaItemPropertyAlbumTitle)
+        }
+        if (durationSeconds.isFinite() && durationSeconds > 0) {
+            info.setObject(durationSeconds, forKey = MPMediaItemPropertyPlaybackDuration)
+        }
+        if (positionSeconds.isFinite() && positionSeconds >= 0) {
+            info.setObject(positionSeconds, forKey = MPNowPlayingInfoPropertyElapsedPlaybackTime)
+        }
+        info.setObject(if (isPlaying) 1.0 else 0.0, forKey = MPNowPlayingInfoPropertyPlaybackRate)
+        nowPlayingInfoCenter.nowPlayingInfo = info as NSDictionary
+    }
+
+    fun clear() {
+        nowPlayingInfoCenter.nowPlayingInfo = null
+        notificationTokens.forEach { notificationCenter.removeObserver(it) }
+        notificationTokens.clear()
+        remoteCommandTokens.forEach { (command, token) -> command.removeTarget(token) }
+        remoteCommandTokens.clear()
+        configured = false
+        onPlay = null
+        onPause = null
+        onSeek = null
+        onNext = null
+        onPrevious = null
+    }
+
+    private fun registerAudioSessionNotifications() {
+        notificationTokens += notificationCenter.addObserverForName(
+            name = platform.AVFAudio.AVAudioSessionInterruptionNotification,
+            `object` = audioSession,
+            queue = NSOperationQueue.mainQueue()) { notification ->
+            val type = notification?.userInfo?.get(
+                platform.AVFAudio.AVAudioSessionInterruptionTypeKey) as? Number
+            if (type?.intValue == platform.AVFAudio.AVAudioSessionInterruptionTypeBegan) {
+                onPause?.invoke()
+            } else if (type?.intValue == platform.AVFAudio.AVAudioSessionInterruptionTypeEnded) {
+                activate()
+                val options = notification?.userInfo?.get(
+                    platform.AVFAudio.AVAudioSessionInterruptionOptionKey) as? Number
+                val shouldResume = (options?.intValue ?: 0) and
+                    platform.AVFAudio.AVAudioSessionInterruptionOptionShouldResume.toInt() != 0
+                if (shouldResume) onPlay?.invoke()
+            }
+        }
+    }
+
+    private fun registerRemoteCommands() {
+        remoteCommandTokens += remoteCommandCenter.playCommand to
+            remoteCommandCenter.playCommand.addTargetWithHandler {
+            onPlay?.invoke()
+            MPRemoteCommandHandlerStatusSuccess
+        }
+        remoteCommandTokens += remoteCommandCenter.pauseCommand to
+            remoteCommandCenter.pauseCommand.addTargetWithHandler {
+            onPause?.invoke()
+            MPRemoteCommandHandlerStatusSuccess
+        }
+        remoteCommandTokens += remoteCommandCenter.changePlaybackPositionCommand to
+            remoteCommandCenter.changePlaybackPositionCommand.addTargetWithHandler { event ->
+            val position = (event as? MPChangePlaybackPositionCommandEvent)?.positionTime
+            if (position != null && position.isFinite() && position >= 0) {
+                onSeek?.invoke(position)
+                MPRemoteCommandHandlerStatusSuccess
+            } else {
+                MPRemoteCommandHandlerStatusCommandFailed
+            }
+        }
+        remoteCommandTokens += remoteCommandCenter.nextTrackCommand to
+            remoteCommandCenter.nextTrackCommand.addTargetWithHandler {
+            onNext?.invoke()
+            MPRemoteCommandHandlerStatusSuccess
+        }
+        remoteCommandTokens += remoteCommandCenter.previousTrackCommand to
+            remoteCommandCenter.previousTrackCommand.addTargetWithHandler {
+            onPrevious?.invoke()
+            MPRemoteCommandHandlerStatusSuccess
+        }
+    }
+}

gradle/libs.versions.toml

@@ -86,7 +86,7 @@ appdirs = { module = "net.harawata:appdirs", version.ref = "appdirs" }
 cache4k = { module = "io.github.reactivecircus.cache4k:cache4k", version.ref = "cache4k" }
 androidx-car-app = { module = "androidx.car.app:app", version.ref = "carApp" }
 compose-shimmer = { module = "com.valentinilk.shimmer:compose-shimmer", version.ref = "composeShimmer" }
-desugar_jdk_libs = { module = "com.android.tools:desugar_jdk_libs", version.ref = "desugar_jdk_libs" }
+desugar_jdk_libs = { module = "com.android.tools:desugar_jdk_libs_nio", version.ref = "desugar_jdk_libs" }
 dns-sd-kt = { module = "com.appstractive:dns-sd-kt", version.ref = "dnssdkt" }
 haze = { module = "dev.chrisbanes.haze:haze", version.ref = "haze" }
 haze-materials = { module = "dev.chrisbanes.haze:haze-blur-materials", version.ref = "haze" }

iosApp/iosApp/Info.plist

@@ -4,6 +4,10 @@
 <dict>
 	<key>CADisableMinimumFrameDurationOnPhone</key>
 	<true/>
+	<key>UIBackgroundModes</key>
+	<array>
+		<string>audio</string>
+	</array>
 	<key>CFBundleURLTypes</key>
 	<array>
 		<dict>