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Fix subtitle selection behaviour

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jgriff6 2022-09-28 22:26:42 +01:00
parent a6ebcc8c58
commit b9abc004a7
1 changed files with 14 additions and 16 deletions
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30
Emby.Server.Implementations/Library/MediaStreamSelector.cs
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@ -45,42 +45,40 @@ namespace Emby.Server.Implementations.Library
.ThenByDescending(x => x.IsForced && string.Equals(x.Language, audioTrackLanguage, StringComparison.OrdinalIgnoreCase)) .ThenByDescending(x => x.IsForced && string.Equals(x.Language, audioTrackLanguage, StringComparison.OrdinalIgnoreCase))
.ThenByDescending(x => x.IsForced) .ThenByDescending(x => x.IsForced)
.ThenByDescending(x => x.IsDefault) .ThenByDescending(x => x.IsDefault)
.ThenByDescending(x => preferredLanguages.Contains(x.Language, StringComparison.OrdinalIgnoreCase))
.ToList(); .ToList();
MediaStream? stream = null; MediaStream? stream = null;
if (mode == SubtitlePlaybackMode.Default) if (mode == SubtitlePlaybackMode.Default)
{ {
// Prefer embedded metadata over smart logic // Load subtitles according to external, forced and default flags.
stream = sortedStreams.FirstOrDefault(s => s.IsExternal || s.IsForced || s.IsDefault); stream = sortedStreams.FirstOrDefault(x => x.IsExternal || x.IsForced || x.IsDefault);
// if the audio language is not understood by the user, load their preferred subs, if there are any
if (stream == null && !preferredLanguages.Contains(audioTrackLanguage, StringComparison.OrdinalIgnoreCase))
{
stream = sortedStreams.FirstOrDefault(s => !s.IsForced && preferredLanguages.Contains(s.Language, StringComparison.OrdinalIgnoreCase));
}
} }
else if (mode == SubtitlePlaybackMode.Smart) else if (mode == SubtitlePlaybackMode.Smart)
{ {
// if the audio language is not understood by the user, load their preferred subs, if there are any // Respect forced flag.
stream = sortedStreams.FirstOrDefault(x => x.IsForced);
// Only attempt to load subtitles if the audio language is not one of the user's preferred subtitle languages.
// If no subtitles of preferred language available, use default behaviour.
if (!preferredLanguages.Contains(audioTrackLanguage, StringComparison.OrdinalIgnoreCase)) if (!preferredLanguages.Contains(audioTrackLanguage, StringComparison.OrdinalIgnoreCase))
{ {
stream = streams.FirstOrDefault(s => !s.IsForced && preferredLanguages.Contains(s.Language, StringComparison.OrdinalIgnoreCase)) ?? stream = sortedStreams.FirstOrDefault(x => preferredLanguages.Contains(x.Language, StringComparison.OrdinalIgnoreCase)) ??
streams.FirstOrDefault(s => preferredLanguages.Contains(s.Language, StringComparison.OrdinalIgnoreCase)); sortedStreams.FirstOrDefault(x => x.IsExternal || x.IsForced || x.IsDefault);
} }
} }
else if (mode == SubtitlePlaybackMode.Always) else if (mode == SubtitlePlaybackMode.Always)
{ {
// always load the most suitable full subtitles // Always load subtitles of the user's preferred subtitle language if possible, otherwise default behaviour.
stream = sortedStreams.FirstOrDefault(s => !s.IsForced); stream = sortedStreams.FirstOrDefault(x => preferredLanguages.Contains(x.Language, StringComparison.OrdinalIgnoreCase)) ??
sortedStreams.FirstOrDefault(x => x.IsExternal || x.IsForced || x.IsDefault);
} }
else if (mode == SubtitlePlaybackMode.OnlyForced) else if (mode == SubtitlePlaybackMode.OnlyForced)
{ {
// always load the most suitable full subtitles // Only load subtitles that are flagged forced.
stream = sortedStreams.FirstOrDefault(x => x.IsForced); stream = sortedStreams.FirstOrDefault(x => x.IsForced);
} }
// load forced subs if we have found no suitable full subtitles
stream ??= sortedStreams.FirstOrDefault(s => s.IsForced && string.Equals(s.Language, audioTrackLanguage, StringComparison.OrdinalIgnoreCase));
return stream?.Index; return stream?.Index;
} }