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using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using BDInfo;
using Jellyfin.Extensions;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.MediaInfo;
namespace MediaBrowser.MediaEncoding.BdInfo;
/// <summary>
/// Class BdInfoExaminer.
/// </summary>
public class BdInfoExaminer : IBlurayExaminer
{
private readonly IFileSystem _fileSystem;
/// <summary>
/// Initializes a new instance of the <see cref="BdInfoExaminer" /> class.
/// </summary>
/// <param name="fileSystem">The filesystem.</param>
public BdInfoExaminer(IFileSystem fileSystem)
{
_fileSystem = fileSystem;
}
/// <summary>
/// Gets the disc info.
/// </summary>
/// <param name="path">The path.</param>
/// <returns>BlurayDiscInfo.</returns>
public BlurayDiscInfo GetDiscInfo(string path)
{
if (string.IsNullOrWhiteSpace(path))
{
throw new ArgumentNullException(nameof(path));
}
var bdrom = new BDROM(BdInfoDirectoryInfo.FromFileSystemPath(_fileSystem, path));
bdrom.Scan();
// Get the longest playlist
var playlist = bdrom.PlaylistFiles.Values.OrderByDescending(p => p.TotalLength).FirstOrDefault(p => p.IsValid);
var outputStream = new BlurayDiscInfo
{
MediaStreams = Array.Empty<MediaStream>()
};
if (playlist is null)
{
return outputStream;
}
outputStream.Chapters = playlist.Chapters.ToArray();
outputStream.RunTimeTicks = TimeSpan.FromSeconds(playlist.TotalLength).Ticks;
var sortedStreams = playlist.SortedStreams;
var mediaStreams = new List<MediaStream>(sortedStreams.Count);
for (int i = 0; i < sortedStreams.Count; i++)
{
var stream = sortedStreams[i];
switch (stream)
{
case TSVideoStream videoStream:
AddVideoStream(mediaStreams, i, videoStream);
break;
case TSAudioStream audioStream:
AddAudioStream(mediaStreams, i, audioStream);
break;
case TSTextStream:
case TSGraphicsStream:
AddSubtitleStream(mediaStreams, i, stream);
break;
}
}
outputStream.MediaStreams = mediaStreams.ToArray();
outputStream.PlaylistName = playlist.Name;
if (playlist.StreamClips is not null && playlist.StreamClips.Count > 0)
{
// Get the files in the playlist
outputStream.Files = playlist.StreamClips.Select(i => i.StreamFile.FileInfo.FullName).ToArray();
}
return outputStream;
}
/// <summary>
/// Adds the video stream.
/// </summary>
/// <param name="streams">The streams.</param>
/// <param name="index">The stream index.</param>
/// <param name="videoStream">The video stream.</param>
private void AddVideoStream(List<MediaStream> streams, int index, TSVideoStream videoStream)
{
var mediaStream = new MediaStream
{
BitRate = Convert.ToInt32(videoStream.BitRate),
Width = videoStream.Width,
Height = videoStream.Height,
Codec = GetNormalizedCodec(videoStream),
IsInterlaced = videoStream.IsInterlaced,
Type = MediaStreamType.Video,
Index = index
};
if (videoStream.FrameRateDenominator > 0)
{
float frameRateEnumerator = videoStream.FrameRateEnumerator;
float frameRateDenominator = videoStream.FrameRateDenominator;
mediaStream.AverageFrameRate = mediaStream.RealFrameRate = frameRateEnumerator / frameRateDenominator;
}
streams.Add(mediaStream);
}
/// <summary>
/// Adds the audio stream.
/// </summary>
/// <param name="streams">The streams.</param>
/// <param name="index">The stream index.</param>
/// <param name="audioStream">The audio stream.</param>
private void AddAudioStream(List<MediaStream> streams, int index, TSAudioStream audioStream)
{
var stream = new MediaStream
{
Codec = GetNormalizedCodec(audioStream),
Language = audioStream.LanguageCode,
ChannelLayout = string.Format(CultureInfo.InvariantCulture, "{0:D}.{1:D}", audioStream.ChannelCount, audioStream.LFE),
Channels = audioStream.ChannelCount + audioStream.LFE,
SampleRate = audioStream.SampleRate,
Type = MediaStreamType.Audio,
Index = index
};
var bitrate = Convert.ToInt32(audioStream.BitRate);
if (bitrate > 0)
{
stream.BitRate = bitrate;
}
streams.Add(stream);
}
/// <summary>
/// Adds the subtitle stream.
/// </summary>
/// <param name="streams">The streams.</param>
/// <param name="index">The stream index.</param>
/// <param name="stream">The stream.</param>
private void AddSubtitleStream(List<MediaStream> streams, int index, TSStream stream)
{
streams.Add(new MediaStream
{
Language = stream.LanguageCode,
Codec = GetNormalizedCodec(stream),
Type = MediaStreamType.Subtitle,
Index = index
});
}
private string GetNormalizedCodec(TSStream stream)
=> stream.StreamType switch
{
TSStreamType.MPEG1_VIDEO => "mpeg1video",
TSStreamType.MPEG2_VIDEO => "mpeg2video",
TSStreamType.VC1_VIDEO => "vc1",
TSStreamType.AC3_PLUS_AUDIO or TSStreamType.AC3_PLUS_SECONDARY_AUDIO => "eac3",
TSStreamType.DTS_AUDIO or TSStreamType.DTS_HD_AUDIO or TSStreamType.DTS_HD_MASTER_AUDIO or TSStreamType.DTS_HD_SECONDARY_AUDIO => "dts",
TSStreamType.PRESENTATION_GRAPHICS => "pgssub",
_ => stream.CodecShortName
};
}
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