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Change tracks in place

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Damontecres 2025-11-06 12:41:58 -05:00
parent 5f2cf5849c
commit 3a4a22ec94
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1 changed files with 161 additions and 78 deletions
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99
app/src/main/java/com/github/damontecres/wholphin/ui/playback/PlaybackViewModel.kt
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@ -84,6 +84,8 @@ import org.jellyfin.sdk.model.api.BaseItemKind
import org.jellyfin.sdk.model.api.DeviceProfile
import org.jellyfin.sdk.model.api.MediaSegmentDto
import org.jellyfin.sdk.model.api.MediaSegmentType
import org.jellyfin.sdk.model.api.MediaSourceInfo
import org.jellyfin.sdk.model.api.MediaStream
import org.jellyfin.sdk.model.api.MediaStreamType
import org.jellyfin.sdk.model.api.PlayMethod
import org.jellyfin.sdk.model.api.PlaybackInfoDto
@ -423,6 +425,56 @@ class PlaybackViewModel
) = withContext(Dispatchers.IO) {
val itemId = item.id
val currentPlayback = this@PlaybackViewModel.currentPlayback.value
if (currentPlayback != null && currentPlayback.playMethod == PlayMethod.DIRECT_PLAY) {
// If direct playing, can try to switch tracks without playback restarting
// Except for external subtitles
// TODO there's probably no reason why we can't add external subtitles?
val source = currentPlayback.mediaSourceInfo
val externalSubtitleCount = source.externalSubtitlesCount
val externalSubtitle = source.findExternalSubtitle(subtitleIndex)
val result =
withContext(Dispatchers.Main) {
applyTrackSelections(
player,
true,
audioIndex,
subtitleIndex,
externalSubtitleCount,
externalSubtitle != null,
)
}
if (result.bothSelected) {
Timber.d("Changes tracks audio=$audioIndex, subtitle=$subtitleIndex")
val itemPlayback =
currentItemPlayback.copy(
sourceId = source.id?.toUUIDOrNull(),
audioIndex = audioIndex ?: TrackIndex.UNSPECIFIED,
subtitleIndex = subtitleIndex ?: TrackIndex.DISABLED,
)
if (userInitiated) {
viewModelScope.launchIO {
Timber.v("Saving user initiated item playback: %s", itemPlayback)
val updated = itemPlaybackRepository.saveItemPlayback(itemPlayback)
withContext(Dispatchers.Main) {
this@PlaybackViewModel.currentItemPlayback.value = updated
}
}
}
withContext(Dispatchers.Main) {
this@PlaybackViewModel.currentPlayback.value =
currentPlayback.copy(
tracks = checkForSupport(player.currentTracks),
)
this@PlaybackViewModel.currentItemPlayback.value = itemPlayback
}
return@withContext
}
}
// TODO
// if (currentItemPlayback.let {
// it.itemId == itemId &&
@ -505,14 +557,10 @@ class PlaybackViewModel
val decision = StreamDecision(itemId, transcodeType, mediaUrl)
Timber.v("Playback decision: $decision")
val externalSubtitleCount =
source.mediaStreams
?.count { it.type == MediaStreamType.SUBTITLE && it.isExternal } ?: 0
val externalSubtitleCount = source.externalSubtitlesCount
val externalSubtitle =
source.mediaStreams
?.firstOrNull { it.type == MediaStreamType.SUBTITLE && it.isExternal && it.index == subtitleIndex }
?.let {
source.findExternalSubtitle(subtitleIndex)?.let {
it.deliveryUrl?.let { deliveryUrl ->
var flags = 0
if (it.isForced) flags = flags.or(C.SELECTION_FLAG_FORCED)
@ -527,6 +575,7 @@ class PlaybackViewModel
.build()
}
}
Timber.v("externalSubtitleCount=$externalSubtitleCount, externalSubtitle=$externalSubtitle")
val mediaItem =
@ -544,6 +593,7 @@ class PlaybackViewModel
playMethod = transcodeType,
playSessionId = response.playSessionId,
liveStreamId = source.liveStreamId,
mediaSourceInfo = source,
)
val itemPlayback =
currentItemPlayback.copy(
@ -580,7 +630,7 @@ class PlaybackViewModel
duration.value = source.runTimeTicks?.ticks
loading.value = LoadingState.Success
currentPlayback.value = playback
this@PlaybackViewModel.currentPlayback.value = playback
this@PlaybackViewModel.currentItemPlayback.value = itemPlayback
player.setMediaItem(
mediaItem,
@ -1056,6 +1106,7 @@ data class CurrentPlayback(
val playMethod: PlayMethod,
val playSessionId: String?,
val liveStreamId: String?,
val mediaSourceInfo: MediaSourceInfo,
)
sealed interface SubtitleSearch {
@ -1084,8 +1135,32 @@ val Format.idAsInt: Int?
}
}
/**
* Returns the number of external subtitle streams there are
*/
val MediaSourceInfo.externalSubtitlesCount: Int
get() =
mediaStreams
?.count { it.type == MediaStreamType.SUBTITLE && it.isExternal } ?: 0
/**
* Returns the [MediaStream] for the given subtitle index iff it is external
*/
fun MediaSourceInfo.findExternalSubtitle(subtitleIndex: Int?): MediaStream? =
subtitleIndex?.let {
mediaStreams
?.firstOrNull { it.type == MediaStreamType.SUBTITLE && it.isExternal && it.index == subtitleIndex }
}
suspend fun <T> onMain(block: suspend CoroutineScope.() -> T) = withContext(Dispatchers.Main, block)
data class TrackSelectionResult(
val audioSelected: Boolean,
val subtitleSelected: Boolean,
) {
val bothSelected: Boolean = audioSelected && subtitleSelected
}
@OptIn(UnstableApi::class)
private fun applyTrackSelections(
player: Player,
@ -1094,7 +1169,8 @@ private fun applyTrackSelections(
subtitleIndex: Int?,
externalSubtitleCount: Int,
subtitleIsExternal: Boolean,
) {
): TrackSelectionResult {
val subtitleSelected =
if (subtitleIndex != null && subtitleIndex >= 0 && (subtitleIsExternal || supportsDirectPlay)) {
val chosenTrack =
if (subtitleIsExternal) {
@ -1129,13 +1205,16 @@ private fun applyTrackSelections(
),
).build()
}
chosenTrack != null
} else {
player.trackSelectionParameters =
player.trackSelectionParameters
.buildUpon()
.setTrackTypeDisabled(C.TRACK_TYPE_TEXT, true)
.build()
true
}
val audioSelected =
if (audioIndex != null && supportsDirectPlay) {
val indexToFind =
audioIndex - externalSubtitleCount + 1
@ -1160,5 +1239,9 @@ private fun applyTrackSelections(
),
).build()
}
chosenTrack != null
} else {
audioIndex == null
}
return TrackSelectionResult(audioSelected, subtitleSelected)
}