jellyfin/MediaBrowser.Providers/MediaInfo/AudioImageProvider.cs

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C#
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#pragma warning disable CS1591
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
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using MediaBrowser.Common.Extensions;
using MediaBrowser.Controller.Configuration;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Entities.Audio;
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using MediaBrowser.Controller.MediaEncoding;
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using MediaBrowser.Controller.Providers;
using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.IO;
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namespace MediaBrowser.Providers.MediaInfo
{
/// <summary>
/// Uses ffmpeg to create video images.
/// </summary>
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public class AudioImageProvider : IDynamicImageProvider
{
private readonly IMediaEncoder _mediaEncoder;
private readonly IServerConfigurationManager _config;
private readonly IFileSystem _fileSystem;
public AudioImageProvider(IMediaEncoder mediaEncoder, IServerConfigurationManager config, IFileSystem fileSystem)
{
_mediaEncoder = mediaEncoder;
_config = config;
_fileSystem = fileSystem;
}
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public string AudioImagesPath => Path.Combine(_config.ApplicationPaths.CachePath, "extracted-audio-images");
public string Name => "Image Extractor";
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public IEnumerable<ImageType> GetSupportedImages(BaseItem item)
{
return new List<ImageType> { ImageType.Primary };
}
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public Task<DynamicImageResponse> GetImage(BaseItem item, ImageType type, CancellationToken cancellationToken)
{
var audio = (Audio)item;
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var imageStreams =
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audio.GetMediaStreams(MediaStreamType.EmbeddedImage)
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.Where(i => i.Type == MediaStreamType.EmbeddedImage)
.ToList();
// Can't extract if we didn't find a video stream in the file
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if (imageStreams.Count == 0)
{
return Task.FromResult(new DynamicImageResponse { HasImage = false });
}
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return GetImage((Audio)item, imageStreams, cancellationToken);
}
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public async Task<DynamicImageResponse> GetImage(Audio item, List<MediaStream> imageStreams, CancellationToken cancellationToken)
{
var path = GetAudioImagePath(item);
if (!File.Exists(path))
{
Directory.CreateDirectory(Path.GetDirectoryName(path));
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var imageStream = imageStreams.FirstOrDefault(i => (i.Comment ?? string.Empty).IndexOf("front", StringComparison.OrdinalIgnoreCase) != -1) ??
imageStreams.FirstOrDefault(i => (i.Comment ?? string.Empty).IndexOf("cover", StringComparison.OrdinalIgnoreCase) != -1) ??
imageStreams.FirstOrDefault();
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var imageStreamIndex = imageStream == null ? (int?)null : imageStream.Index;
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var tempFile = await _mediaEncoder.ExtractAudioImage(item.Path, imageStreamIndex, cancellationToken).ConfigureAwait(false);
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File.Copy(tempFile, path, true);
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try
{
_fileSystem.DeleteFile(tempFile);
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}
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catch
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{
}
}
return new DynamicImageResponse
{
HasImage = true,
Path = path
};
}
private string GetAudioImagePath(Audio item)
{
string filename;
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if (item.GetType() == typeof(Audio))
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{
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if (item.AlbumArtists.Count > 0
&& !string.IsNullOrWhiteSpace(item.Album)
&& !string.IsNullOrWhiteSpace(item.AlbumArtists[0]))
{
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filename = (item.Album + "-" + item.AlbumArtists[0]).GetMD5().ToString("N", CultureInfo.InvariantCulture);
}
else
{
filename = item.Id.ToString("N", CultureInfo.InvariantCulture);
}
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filename += ".jpg";
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}
else
{
// If it's an audio book or audio podcast, allow unique image per item
filename = item.Id.ToString("N", CultureInfo.InvariantCulture) + ".jpg";
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}
var prefix = filename.AsSpan().Slice(0, 1);
return Path.Join(AudioImagesPath, prefix, filename);
}
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public bool Supports(BaseItem item)
{
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if (item.IsShortcut)
{
return false;
}
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if (!item.IsFileProtocol)
{
return false;
}
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var audio = item as Audio;
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return audio != null;
}
}
}