fix: Force transcoding of subtitles with nativePlayer + external (#592)

Co-authored-by: PartyDonut <PartyDonut@users.noreply.github.com>

android/app/src/main/kotlin/nl/jknaapen/fladder/composables/dialogs/SubtitlePicker.kt

@@ -34,29 +34,21 @@ fun SubtitlePicker(
     val subTitles by VideoPlayerObject.subtitleTracks.collectAsState(emptyList())
     val internalSubTracks by VideoPlayerObject.exoSubTracks.collectAsState(emptyList())
 
-    if (internalSubTracks.isEmpty()) return
+    if (subTitles.isEmpty()) return
 
-    val focusOffTrack = remember { FocusRequester() }
+    val focusRequesters = remember(subTitles) {
-
+        subTitles.associateWith { FocusRequester() }
-    val focusRequesters = remember(internalSubTracks) {
-        internalSubTracks.associateWith { FocusRequester() }
     }
 
     val listState = rememberLazyListState()
 
-    LaunchedEffect(selectedIndex, subTitles, internalSubTracks) {
+    LaunchedEffect(selectedIndex, subTitles) {
-        val serverSubIndex = subTitles.indexOfFirst { it.index == selectedIndex.toLong() }
+        val selectedSubIndex = subTitles.indexOfFirst { it.index == selectedIndex.toLong() }
 
-        if (serverSubIndex <= 0) {
+        if (selectedSubIndex in subTitles.indices) {
-            focusOffTrack.requestFocus()
+            listState.scrollToItem(selectedSubIndex)
-            return@LaunchedEffect
+            focusRequesters[subTitles[selectedSubIndex]]?.requestFocus()
         }
-
-        val internalIndex = serverSubIndex - 1
-        val lazyColumnIndex = internalIndex + 1
-
-        listState.scrollToItem(lazyColumnIndex)
-        focusRequesters[internalSubTracks[internalIndex]]?.requestFocus()
     }
 
     CustomModalBottomSheet(
@@ -69,45 +61,45 @@ fun SubtitlePicker(
                 .wrapContentWidth()
                 .padding(horizontal = 8.dp, vertical = 16.dp),
         ) {
+            subTitles.forEachIndexed { index, serverSub ->
+                val isOffTrack = index == 0
+                val selected = serverSub.index == selectedIndex.toLong()
+
                 item {
-                val selectedOff = -1 == selectedIndex
                     TrackButton(
                         modifier = Modifier
                             .fillMaxWidth()
-                        .focusRequester(focusOffTrack),
+                            .focusRequester(focusRequesters[serverSub]!!),
                         onClick = {
+                            if (isOffTrack) {
                                 VideoPlayerObject.setSubtitleTrackIndex(-1)
                                 player.clearSubtitleTrack()
-                    },
+                            } else {
-                    selected = selectedOff
+                                val internalTrackIndex = index - 1
-                ) {
+
-                    Translate(Localized::off) {
+                                val internalSubTrack =
-                        Text(it)
+                                    internalSubTracks.elementAtOrNull(internalTrackIndex)
+
+                                if (internalSubTrack != null) {
+                                    VideoPlayerObject.setSubtitleTrackIndex(serverSub.index.toInt())
+                                    player.setInternalSubtitleTrack(internalSubTrack)
                                 }
                             }
-            }
-            internalSubTracks.forEachIndexed { index, subtitle ->
-                val serverSub = subTitles.elementAtOrNull(index + 1)
-                val selected = serverSub?.index == selectedIndex.toLong()
-                item {
-                    TrackButton(
-                        modifier = Modifier
-                            .fillMaxWidth()
-                            .focusRequester(focusRequesters[subtitle]!!),
-                        onClick = {
-                            serverSub?.index?.let {
-                                VideoPlayerObject.setSubtitleTrackIndex(it.toInt())
-                            }
-                            player.setInternalSubtitleTrack(subtitle)
                         },
                         selected = selected,
                     ) {
+                        if (isOffTrack) {
+                            Translate(Localized::off) {
+                                Text(it)
+                            }
+                        } else {
                             Text(
-                            text = serverSub?.name ?: "",
+                                text = serverSub.name,
                             )
                         }
                     }
                 }
             }
         }
+    }
 }

lib/models/playback/playback_model.dart

@@ -22,6 +22,7 @@ import 'package:fladder/models/playback/direct_playback_model.dart';
 import 'package:fladder/models/playback/offline_playback_model.dart';
 import 'package:fladder/models/playback/playback_options_dialogue.dart';
 import 'package:fladder/models/playback/transcode_playback_model.dart';
+import 'package:fladder/models/settings/video_player_settings.dart';
 import 'package:fladder/models/syncing/sync_item.dart';
 import 'package:fladder/models/video_stream_model.dart';
 import 'package:fladder/profiles/default_profile.dart';
@@ -277,12 +278,18 @@ class PlaybackModelHelper {
           oldModel?.mediaStreams?.currentAudioStream,
           newStreamModel?.audioStreams,
           newStreamModel?.defaultAudioStreamIndex);
+
       final subStreamIndex = selectSubStream(
           ref.read(userProvider.select((value) => value?.userConfiguration?.rememberSubtitleSelections ?? true)),
           oldModel?.mediaStreams?.currentSubStream,
           newStreamModel?.subStreams,
           newStreamModel?.defaultSubStreamIndex);
 
+      //Native player does not allow for loading external subtitles with transcoding
+      final isNativePlayer =
+          ref.read(videoPlayerSettingsProvider.select((value) => value.wantedPlayer == PlayerOptions.nativePlayer));
+      final isExternalSub = newStreamModel?.currentSubStream?.isExternal == true;
+
       final Response<PlaybackInfoResponse> response = await api.itemsItemIdPlaybackInfoPost(
         itemId: item.id,
         body: PlaybackInfoDto(
@@ -295,6 +302,7 @@ class PlaybackModelHelper {
           userId: userId,
           enableDirectPlay: type != PlaybackType.transcode,
           enableDirectStream: type != PlaybackType.transcode,
+          alwaysBurnInSubtitleWhenTranscoding: isNativePlayer && isExternalSub,
           maxStreamingBitrate: qualityOptions.enabledFirst.keys.firstOrNull?.bitRate,
           mediaSourceId: newStreamModel?.currentVersionStream?.id,
         ),