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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using MediaBrowser.Common.Extensions;
using MediaBrowser.Controller.Configuration;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Entities.Audio;
using MediaBrowser.Controller.MediaEncoding;
using MediaBrowser.Controller.Providers;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.IO;
namespace MediaBrowser.Providers.MediaInfo
{
/// <summary>
/// Uses ffmpeg to create video images
/// </summary>
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;
}
public IEnumerable<ImageType> GetSupportedImages(BaseItem item)
{
return new List<ImageType> { ImageType.Primary };
}
public Task<DynamicImageResponse> GetImage(BaseItem item, ImageType type, CancellationToken cancellationToken)
{
var audio = (Audio)item;
var imageStreams =
audio.GetMediaStreams(MediaStreamType.EmbeddedImage)
.Where(i => i.Type == MediaStreamType.EmbeddedImage)
.ToList();
// Can't extract if we didn't find a video stream in the file
if (imageStreams.Count == 0)
{
return Task.FromResult(new DynamicImageResponse { HasImage = false });
}
return GetImage((Audio)item, imageStreams, cancellationToken);
}
public async Task<DynamicImageResponse> GetImage(Audio item, List<MediaStream> imageStreams, CancellationToken cancellationToken)
{
var path = GetAudioImagePath(item);
if (!_fileSystem.FileExists(path))
{
_fileSystem.CreateDirectory(_fileSystem.GetDirectoryName(path));
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();
var imageStreamIndex = imageStream == null ? (int?)null : imageStream.Index;
var tempFile = await _mediaEncoder.ExtractAudioImage(item.Path, imageStreamIndex, cancellationToken).ConfigureAwait(false);
_fileSystem.CopyFile(tempFile, path, true);
try
{
_fileSystem.DeleteFile(tempFile);
}
catch
{
}
}
return new DynamicImageResponse
{
HasImage = true,
Path = path
};
}
private string GetAudioImagePath(Audio item)
{
string filename = null;
if (item.GetType() == typeof(Audio))
{
var albumArtist = item.AlbumArtists.FirstOrDefault();
if (!string.IsNullOrWhiteSpace(item.Album) && !string.IsNullOrWhiteSpace(albumArtist))
{
filename = (item.Album + "-" + albumArtist).GetMD5().ToString("N");
}
else
{
filename = item.Id.ToString("N");
}
filename += ".jpg";
}
else
{
// If it's an audio book or audio podcast, allow unique image per item
filename = item.Id.ToString("N") + ".jpg";
}
var prefix = filename.Substring(0, 1);
return Path.Combine(AudioImagesPath, prefix, filename);
}
public string AudioImagesPath => Path.Combine(_config.ApplicationPaths.CachePath, "extracted-audio-images");
public string Name => "Image Extractor";
public bool Supports(BaseItem item)
{
if (item.IsShortcut)
{
return false;
}
if (!item.IsFileProtocol)
{
return false;
}
var audio = item as Audio;
return audio != null;
}
}
}
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