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jellyfin/MediaBrowser.Providers/MediaInfo/MediaInfoResolver.cs

236 lines
9.6 KiB

using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Emby.Naming.Common;
using Emby.Naming.ExternalFiles;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.MediaEncoding;
using MediaBrowser.Controller.Providers;
using MediaBrowser.Model.Dlna;
using MediaBrowser.Model.Dto;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.Globalization;
using MediaBrowser.Model.MediaInfo;
namespace MediaBrowser.Providers.MediaInfo
{
/// <summary>
/// Resolves external files for <see cref="Video"/>.
/// </summary>
public abstract class MediaInfoResolver
{
/// <summary>
/// The <see cref="CompareOptions"/> instance.
/// </summary>
private const CompareOptions CompareOptions = System.Globalization.CompareOptions.IgnoreCase | System.Globalization.CompareOptions.IgnoreNonSpace | System.Globalization.CompareOptions.IgnoreSymbols;
/// <summary>
/// The <see cref="CompareInfo"/> instance.
/// </summary>
private readonly CompareInfo _compareInfo = CultureInfo.InvariantCulture.CompareInfo;
/// <summary>
/// The <see cref="ExternalPathParser"/> instance.
/// </summary>
private readonly ExternalPathParser _externalPathParser;
/// <summary>
/// The <see cref="IMediaEncoder"/> instance.
/// </summary>
private readonly IMediaEncoder _mediaEncoder;
/// <summary>
/// The <see cref="NamingOptions"/> instance.
/// </summary>
private readonly NamingOptions _namingOptions;
/// <summary>
/// The <see cref="DlnaProfileType"/> of the files this resolver should resolve.
/// </summary>
private readonly DlnaProfileType _type;
/// <summary>
/// Initializes a new instance of the <see cref="MediaInfoResolver"/> class.
/// </summary>
/// <param name="localizationManager">The localization manager.</param>
/// <param name="mediaEncoder">The media encoder.</param>
/// <param name="namingOptions">The <see cref="NamingOptions"/> object containing FileExtensions, MediaDefaultFlags, MediaForcedFlags and MediaFlagDelimiters.</param>
/// <param name="type">The <see cref="DlnaProfileType"/> of the parsed file.</param>
protected MediaInfoResolver(
ILocalizationManager localizationManager,
IMediaEncoder mediaEncoder,
NamingOptions namingOptions,
DlnaProfileType type)
{
_mediaEncoder = mediaEncoder;
_namingOptions = namingOptions;
_type = type;
_externalPathParser = new ExternalPathParser(namingOptions, localizationManager, _type);
}
/// <summary>
/// Retrieves the external streams for the provided video.
/// </summary>
/// <param name="video">The <see cref="Video"/> object to search external streams for.</param>
/// <param name="startIndex">The stream index to start adding external streams at.</param>
/// <param name="directoryService">The directory service to search for files.</param>
/// <param name="clearCache">True if the directory service cache should be cleared before searching.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>The external streams located.</returns>
public async Task<IReadOnlyList<MediaStream>> GetExternalStreamsAsync(
Video video,
int startIndex,
IDirectoryService directoryService,
bool clearCache,
CancellationToken cancellationToken)
{
if (!video.IsFileProtocol)
{
return Array.Empty<MediaStream>();
}
var pathInfos = GetExternalFiles(video, directoryService, clearCache);
if (!pathInfos.Any())
{
return Array.Empty<MediaStream>();
}
var mediaStreams = new List<MediaStream>();
foreach (var pathInfo in pathInfos)
{
var mediaInfo = await GetMediaInfo(pathInfo.Path, _type, cancellationToken).ConfigureAwait(false);
if (mediaInfo.MediaStreams.Count == 1)
{
MediaStream mediaStream = mediaInfo.MediaStreams[0];
mediaStream.Index = startIndex++;
mediaStream.IsDefault = pathInfo.IsDefault || mediaStream.IsDefault;
mediaStream.IsForced = pathInfo.IsForced || mediaStream.IsForced;
mediaStreams.Add(MergeMetadata(mediaStream, pathInfo));
}
else
{
foreach (MediaStream mediaStream in mediaInfo.MediaStreams)
{
mediaStream.Index = startIndex++;
mediaStreams.Add(MergeMetadata(mediaStream, pathInfo));
}
}
}
return mediaStreams.AsReadOnly();
}
/// <summary>
/// Returns the external file infos for the given video.
/// </summary>
/// <param name="video">The <see cref="Video"/> object to search external files for.</param>
/// <param name="directoryService">The directory service to search for files.</param>
/// <param name="clearCache">True if the directory service cache should be cleared before searching.</param>
/// <returns>The external file paths located.</returns>
public IReadOnlyList<ExternalPathParserResult> GetExternalFiles(
Video video,
IDirectoryService directoryService,
bool clearCache)
{
if (!video.IsFileProtocol)
{
return Array.Empty<ExternalPathParserResult>();
}
// Check if video folder exists
string folder = video.ContainingFolderPath;
if (!directoryService.PathExists(folder))
{
return Array.Empty<ExternalPathParserResult>();
}
var externalPathInfos = new List<ExternalPathParserResult>();
var files = directoryService.GetFilePaths(folder, clearCache).ToList();
var internalMetadataPath = video.GetInternalMetadataPath();
if (directoryService.PathExists(internalMetadataPath))
{
files.AddRange(directoryService.GetFilePaths(internalMetadataPath, clearCache));
}
if (!files.Any())
{
return Array.Empty<ExternalPathParserResult>();
}
foreach (var file in files)
{
var fileNameWithoutExtension = Path.GetFileNameWithoutExtension(file);
if (_compareInfo.IsPrefix(fileNameWithoutExtension, video.FileNameWithoutExtension, CompareOptions, out int matchLength)
&& (fileNameWithoutExtension.Length == matchLength || _namingOptions.MediaFlagDelimiters.Contains(fileNameWithoutExtension[matchLength].ToString())))
{
var externalPathInfo = _externalPathParser.ParseFile(file, fileNameWithoutExtension[matchLength..]);
if (externalPathInfo != null)
{
externalPathInfos.Add(externalPathInfo);
}
}
}
return externalPathInfos;
}
/// <summary>
/// Returns the media info of the given file.
/// </summary>
/// <param name="path">The path to the file.</param>
/// <param name="type">The <see cref="DlnaProfileType"/>.</param>
/// <param name="cancellationToken">The cancellation token to cancel operation.</param>
/// <returns>The media info for the given file.</returns>
private Task<Model.MediaInfo.MediaInfo> GetMediaInfo(string path, DlnaProfileType type, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
return _mediaEncoder.GetMediaInfo(
new MediaInfoRequest
{
MediaType = type,
MediaSource = new MediaSourceInfo
{
Path = path,
Protocol = MediaProtocol.File
}
},
cancellationToken);
}
/// <summary>
/// Merges path metadata into stream metadata.
/// </summary>
/// <param name="mediaStream">The <see cref="MediaStream"/> object.</param>
/// <param name="pathInfo">The <see cref="ExternalPathParserResult"/> object.</param>
/// <returns>The modified mediaStream.</returns>
private MediaStream MergeMetadata(MediaStream mediaStream, ExternalPathParserResult pathInfo)
{
mediaStream.Path = pathInfo.Path;
mediaStream.IsExternal = true;
mediaStream.Title = string.IsNullOrEmpty(mediaStream.Title) ? (string.IsNullOrEmpty(pathInfo.Title) ? null : pathInfo.Title) : mediaStream.Title;
mediaStream.Language = string.IsNullOrEmpty(mediaStream.Language) ? (string.IsNullOrEmpty(pathInfo.Language) ? null : pathInfo.Language) : mediaStream.Language;
mediaStream.Type = _type switch
{
DlnaProfileType.Audio => MediaStreamType.Audio,
DlnaProfileType.Subtitle => MediaStreamType.Subtitle,
_ => mediaStream.Type
};
return mediaStream;
}
}
}