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using MediaBrowser.Model.Configuration;
using MediaBrowser.Model.Dto;
using MediaBrowser.Model.Entities;
using System;
using System.Collections.Generic;
using System.Linq;
namespace MediaBrowser.Model.MediaInfo
{
public static class MediaStreamSelector
{
public static int? GetDefaultAudioStreamIndex(MediaSourceInfo mediaSource, IEnumerable<string> preferredLanguages, bool preferDefaultTrack)
{
var streams = GetSortedStreams(mediaSource.MediaStreams, MediaStreamType.Audio, preferredLanguages.FirstOrDefault())
.ToList();
if (preferDefaultTrack)
{
var defaultStream = streams.FirstOrDefault(i => i.IsDefault);
if (defaultStream != null)
{
return defaultStream.Index;
}
}
var stream = streams.FirstOrDefault();
if (stream != null)
{
return stream.Index;
}
return null;
}
public static int? GetDefaultSubtitleStreamIndex(MediaSourceInfo mediaSource,
IEnumerable<string> preferredLanguages,
SubtitlePlaybackMode mode,
string audioTrackLanguage)
{
var streams = GetSortedStreams(mediaSource.MediaStreams, MediaStreamType.Subtitle, preferredLanguages.FirstOrDefault())
.ToList();
MediaStream stream = null;
if (mode == SubtitlePlaybackMode.Default)
{
stream = streams.FirstOrDefault(i => i.IsDefault);
}
else if (mode == SubtitlePlaybackMode.Always)
{
stream = streams.FirstOrDefault(i => i.IsDefault) ??
streams.FirstOrDefault();
}
else if (mode == SubtitlePlaybackMode.OnlyForced)
{
stream = streams.FirstOrDefault(i => i.IsForced);
}
if (stream != null)
{
return stream.Index;
}
return null;
}
private static IEnumerable<MediaStream> GetSortedStreams(IEnumerable<MediaStream> streams, MediaStreamType type, string defaultLanguage)
{
var orderStreams = streams
.Where(i => i.Type == type);
// For subs give a preference to text for performance
if (string.IsNullOrEmpty(defaultLanguage))
{
return orderStreams.OrderBy(i => i.IsDefault)
.ThenBy(i => !i.IsGraphicalSubtitleStream)
.ThenBy(i => i.Index)
.ToList();
}
return orderStreams.OrderBy(i => string.Equals(i.Language, defaultLanguage, StringComparison.OrdinalIgnoreCase))
.ThenBy(i => i.IsDefault)
.ThenBy(i => !i.IsGraphicalSubtitleStream)
.ThenBy(i => i.Index)
.ToList();
}
}
}
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