feat(playback): add uncompressed flac playback support

cli/commands/install-dependencies.dart

@@ -39,6 +39,11 @@ class InstallDependenciesCommand extends Command {
 
     switch (argResults!.option("platform")) {
       case "windows":
+        await shell.run(
+          """
+          choco install innosetup -y
+          """,
+        );
         break;
       case "linux":
         await shell.run(

lib/l10n/app_en.arb

@@ -462,5 +462,6 @@
   "configure_your_own_metadata_plugin": "Configure your own playlist/album/artist/feed metadata provider",
   "audio_scrobblers": "Audio Scrobblers",
   "scrobbling": "Scrobbling",
-  "source": "Source: "
+  "source": "Source: ",
+  "uncompressed": "Uncompressed"
 }

lib/l10n/generated/app_localizations.dart

@@ -2936,6 +2936,12 @@ abstract class AppLocalizations {
   /// In en, this message translates to:
   /// **'Source: '**
   String get source;
+
+  /// No description provided for @uncompressed.
+  ///
+  /// In en, this message translates to:
+  /// **'Uncompressed'**
+  String get uncompressed;
 }
 
 class _AppLocalizationsDelegate

lib/l10n/generated/app_localizations_ar.dart

@@ -1540,4 +1540,7 @@ class AppLocalizationsAr extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_bn.dart

@@ -1541,4 +1541,7 @@ class AppLocalizationsBn extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_ca.dart

@@ -1551,4 +1551,7 @@ class AppLocalizationsCa extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_cs.dart

@@ -1541,4 +1541,7 @@ class AppLocalizationsCs extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_de.dart

@@ -1553,4 +1553,7 @@ class AppLocalizationsDe extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_en.dart

@@ -1539,4 +1539,7 @@ class AppLocalizationsEn extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_es.dart

@@ -1554,4 +1554,7 @@ class AppLocalizationsEs extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_eu.dart

@@ -1551,4 +1551,7 @@ class AppLocalizationsEu extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_fa.dart

@@ -1539,4 +1539,7 @@ class AppLocalizationsFa extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_fi.dart

@@ -1539,4 +1539,7 @@ class AppLocalizationsFi extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_fr.dart

@@ -1559,4 +1559,7 @@ class AppLocalizationsFr extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_hi.dart

@@ -1545,4 +1545,7 @@ class AppLocalizationsHi extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_id.dart

@@ -1547,4 +1547,7 @@ class AppLocalizationsId extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_it.dart

@@ -1546,4 +1546,7 @@ class AppLocalizationsIt extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_ja.dart

@@ -1510,4 +1510,7 @@ class AppLocalizationsJa extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_ka.dart

@@ -1548,4 +1548,7 @@ class AppLocalizationsKa extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_ko.dart

@@ -1514,4 +1514,7 @@ class AppLocalizationsKo extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_ne.dart

@@ -1551,4 +1551,7 @@ class AppLocalizationsNe extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_nl.dart

@@ -1545,4 +1545,7 @@ class AppLocalizationsNl extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_pl.dart

@@ -1547,4 +1547,7 @@ class AppLocalizationsPl extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_pt.dart

@@ -1544,4 +1544,7 @@ class AppLocalizationsPt extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_ru.dart

@@ -1547,4 +1547,7 @@ class AppLocalizationsRu extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_ta.dart

@@ -1553,4 +1553,7 @@ class AppLocalizationsTa extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_th.dart

@@ -1536,4 +1536,7 @@ class AppLocalizationsTh extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_tl.dart

@@ -1554,4 +1554,7 @@ class AppLocalizationsTl extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_tr.dart

@@ -1547,4 +1547,7 @@ class AppLocalizationsTr extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_uk.dart

@@ -1543,4 +1543,7 @@ class AppLocalizationsUk extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_vi.dart

@@ -1549,4 +1549,7 @@ class AppLocalizationsVi extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }

lib/l10n/generated/app_localizations_zh.dart

@@ -1503,6 +1503,9 @@ class AppLocalizationsZh extends AppLocalizations {
 
   @override
   String get source => 'Source: ';
+
+  @override
+  String get uncompressed => 'Uncompressed';
 }
 
 /// The translations for Chinese, as used in Taiwan (`zh_TW`).

lib/models/database/tables/preferences.dart

@@ -41,14 +41,6 @@ enum YoutubeClientEngine {
   }
 }
 
-enum MusicCodec {
-  m4a._("M4a (Best for downloaded music)"),
-  weba._("WebA (Best for streamed music)\nDoesn't support audio metadata");
-
-  final String label;
-  const MusicCodec._(this.label);
-}
-
 enum SearchMode {
   youtube._("YouTube"),
   youtubeMusic._("YouTube Music");

lib/pages/settings/sections/playback.dart

@@ -44,6 +44,11 @@ class SettingsPlaybackSection extends HookConsumerWidget {
           title: Text(context.l10n.audio_quality),
           value: preferences.audioQuality,
           options: [
+            if (preferences.audioSource == AudioSource.dabMusic)
+              SelectItemButton(
+                value: SourceQualities.uncompressed,
+                child: Text(context.l10n.uncompressed),
+              ),
             SelectItemButton(
               value: SourceQualities.high,
               child: Text(context.l10n.high),

lib/provider/server/routes/playback.dart

@@ -101,10 +101,7 @@ class ServerPlaybackRoutes {
     );
 
     final contentLengthRes = await Future<dio_lib.Response?>.value(
-      dio.head(
-        url,
-        options: options,
-      ),
+      dio.head(url, options: options),
     ).catchError((e, stack) async {
       AppLogger.reportError(e, stack);
 
@@ -135,6 +132,21 @@ class ServerPlaybackRoutes {
       );
     }
 
+    if (headers["range"] == "bytes=0-") {
+      final bufferSize =
+          userPreferences.audioQuality == SourceQualities.uncompressed
+              ? 6 * 1024 * 1024
+              : 4 * 1024 * 1024;
+      final endRange = min(bufferSize,
+          int.parse(contentLengthRes?.headers.value("content-length") ?? "0"));
+      options = options.copyWith(
+        headers: {
+          ...options.headers ?? {},
+          "range": "bytes=0-$endRange",
+        },
+      );
+    }
+
     final res = await dio.get<Uint8List>(url, options: options);
 
     final bytes = res.data;
@@ -166,7 +178,7 @@ class ServerPlaybackRoutes {
       await trackPartialCacheFile.rename(trackCacheFile.path);
     }
 
-    if (contentRange.total == fileLength && track.codec == SourceCodecs.m4a) {
+    if (contentRange.total == fileLength && track.codec != SourceCodecs.weba) {
       final playlistTrack = playlist.tracks.firstWhereOrNull(
         (element) => element.id == track.query.id,
       );

lib/provider/user_preferences/user_preferences_provider.dart

@@ -54,6 +54,7 @@ class UserPreferencesNotifier extends Notifier<PreferencesTableData> {
           }
 
           await audioPlayer.setAudioNormalization(state.normalizeAudio);
+          await _updatePlayerBufferSize(event.audioQuality, state.audioQuality);
         } catch (e, stack) {
           AppLogger.reportError(e, stack);
         }
@@ -79,6 +80,24 @@ class UserPreferencesNotifier extends Notifier<PreferencesTableData> {
     });
   }
 
+  /// Sets audio player's buffer size based on the selected audio quality
+  /// Uncompressed quality gets a larger buffer size for smoother playback
+  /// while other qualities use a standard buffer size.
+  Future<void> _updatePlayerBufferSize(
+    SourceQualities newQuality,
+    SourceQualities oldQuality,
+  ) async {
+    if (newQuality == SourceQualities.uncompressed) {
+      audioPlayer.setDemuxerBufferSize(6 * 1024 * 1024); // 6MB
+      return;
+    }
+
+    if (oldQuality == SourceQualities.uncompressed &&
+        newQuality != SourceQualities.uncompressed) {
+      audioPlayer.setDemuxerBufferSize(4 * 1024 * 1024); // 4MB
+    }
+  }
+
   Future<void> setData(PreferencesTableCompanion data) async {
     final db = ref.read(databaseProvider);
 
@@ -155,6 +174,7 @@ class UserPreferencesNotifier extends Notifier<PreferencesTableData> {
 
   void setAudioQuality(SourceQualities quality) {
     setData(PreferencesTableCompanion(audioQuality: Value(quality)));
+    _updatePlayerBufferSize(quality, state.audioQuality);
   }
 
   void setDownloadLocation(String downloadDir) {
@@ -204,6 +224,11 @@ class UserPreferencesNotifier extends Notifier<PreferencesTableData> {
   }
 
   void setAudioSource(AudioSource type) {
+    // Only allow uncompressed quality for DAB Music
+    if (type != AudioSource.dabMusic &&
+        state.audioQuality == SourceQualities.uncompressed) {
+      setAudioQuality(SourceQualities.high);
+    }
     setData(PreferencesTableCompanion(audioSource: Value(type)));
   }
 

lib/services/audio_player/audio_player_impl.dart

@@ -131,4 +131,8 @@ class SpotubeAudioPlayer extends AudioPlayerInterface
   Future<void> setAudioNormalization(bool normalize) async {
     await _mkPlayer.setAudioNormalization(normalize);
   }
+
+  Future<void> setDemuxerBufferSize(int sizeInBytes) async {
+    await _mkPlayer.setDemuxerBufferSize(sizeInBytes);
+  }
 }

lib/services/audio_player/custom_player.dart

@@ -133,4 +133,12 @@ class CustomPlayer extends Player {
       await nativePlayer.setProperty('af', '');
     }
   }
+
+  Future<void> setDemuxerBufferSize(int sizeInBytes) async {
+    await nativePlayer.setProperty('demuxer-max-bytes', sizeInBytes.toString());
+    await nativePlayer.setProperty(
+      'demuxer-max-back-bytes',
+      sizeInBytes.toString(),
+    );
+  }
 }

lib/services/sourced_track/enums.dart

@@ -3,13 +3,15 @@ import 'package:spotube/models/playback/track_sources.dart';
 enum SourceCodecs {
   m4a._("M4a (Best for downloaded music)"),
   weba._("WebA (Best for streamed music)\nDoesn't support audio metadata"),
-  mp3._("MP3 (Widely supported audio format)");
+  mp3._("MP3 (Widely supported audio format)"),
+  flac._("FLAC (Lossless, best quality)\nLarge file size");
 
   final String label;
   const SourceCodecs._(this.label);
 }
 
 enum SourceQualities {
+  uncompressed(3),
   high(2),
   medium(1),
   low(0);

lib/services/sourced_track/sourced_track.dart

@@ -212,7 +212,10 @@ abstract class SourcedTrack extends BasicSourcedTrack {
     final preferences = ref.read(userPreferencesProvider);
 
     return switch (preferences.audioSource) {
-      AudioSource.dabMusic => SourceCodecs.mp3,
+      AudioSource.dabMusic =>
+        preferences.audioQuality == SourceQualities.uncompressed
+            ? SourceCodecs.flac
+            : SourceCodecs.mp3,
       AudioSource.jiosaavn => SourceCodecs.m4a,
       _ => preferences.streamMusicCodec
     };

lib/services/sourced_track/sources/dab_music.dart

@@ -56,9 +56,10 @@ class DABMusicSourcedTrack extends SourcedTrack {
     SourceQualities quality,
   ) async {
     try {
+      final isUncompressed = quality == SourceQualities.uncompressed;
       final streamResponse = await dabMusicApiClient.music.getStream(
         trackId: id,
-        quality: "5", // mp3 320kbps (best available)
+        quality: isUncompressed ? "27" : "5",
       );
       if (streamResponse.url == null) {
         throw Exception("No stream URL found for track ID: $id");
@@ -66,9 +67,11 @@ class DABMusicSourcedTrack extends SourcedTrack {
       return [
         TrackSource(
           url: streamResponse.url!,
-          quality: SourceQualities.high,
-          bitrate: "320kbps",
-          codec: SourceCodecs.mp3,
+          quality: isUncompressed
+              ? SourceQualities.uncompressed
+              : SourceQualities.high,
+          bitrate: isUncompressed ? "2998kbps" : "320kbps",
+          codec: isUncompressed ? SourceCodecs.flac : SourceCodecs.mp3,
         ),
       ];
     } catch (e, stackTrace) {
@@ -126,7 +129,7 @@ class DABMusicSourcedTrack extends SourcedTrack {
       if (results.isEmpty) {
         final res = await dabMusicApiClient.music.getSearch(
           q: SourcedTrack.getSearchTerm(query),
-          limit: 20,
+          limit: 5,
         );
         results = res.tracks ?? <Track>[];
       }

untranslated_messages.json

@@ -1,118 +1,147 @@
 {
   "ar": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "bn": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "ca": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "cs": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "de": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "es": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "eu": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "fa": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "fi": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "fr": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "hi": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "id": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "it": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "ja": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "ka": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "ko": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "ne": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "nl": [
     "audio_source",
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "pl": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "pt": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "ru": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "ta": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "th": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "tl": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "tr": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "uk": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "vi": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "zh": [
-    "source"
+    "source",
+    "uncompressed"
   ],
 
   "zh_TW": [
-    "source"
+    "source",
+    "uncompressed"
   ]
 }