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168 lines
5.6 KiB
168 lines
5.6 KiB
using MediaBrowser.Common.Extensions;
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using MediaBrowser.Common.IO;
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using MediaBrowser.Controller.Configuration;
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using MediaBrowser.Controller.Entities;
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using MediaBrowser.Controller.Entities.Audio;
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using MediaBrowser.Controller.MediaEncoding;
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using MediaBrowser.Controller.Providers;
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using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.IO;
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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namespace MediaBrowser.Providers.MediaInfo
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{
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/// <summary>
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/// Uses ffmpeg to create video images
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/// </summary>
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public class AudioImageProvider : IDynamicImageProvider, IHasChangeMonitor
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{
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private readonly ConcurrentDictionary<string, SemaphoreSlim> _locks = new ConcurrentDictionary<string, SemaphoreSlim>();
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private readonly IIsoManager _isoManager;
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private readonly IMediaEncoder _mediaEncoder;
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private readonly IServerConfigurationManager _config;
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private readonly IFileSystem _fileSystem;
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public AudioImageProvider(IIsoManager isoManager, IMediaEncoder mediaEncoder, IServerConfigurationManager config, IFileSystem fileSystem)
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{
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_isoManager = isoManager;
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_mediaEncoder = mediaEncoder;
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_config = config;
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_fileSystem = fileSystem;
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}
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/// <summary>
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/// The null mount task result
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/// </summary>
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protected readonly Task<IIsoMount> NullMountTaskResult = Task.FromResult<IIsoMount>(null);
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/// <summary>
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/// Mounts the iso if needed.
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/// </summary>
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/// <param name="item">The item.</param>
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/// <param name="cancellationToken">The cancellation token.</param>
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/// <returns>Task{IIsoMount}.</returns>
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protected Task<IIsoMount> MountIsoIfNeeded(Video item, CancellationToken cancellationToken)
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{
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if (item.VideoType == VideoType.Iso)
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{
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return _isoManager.Mount(item.Path, cancellationToken);
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}
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return NullMountTaskResult;
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}
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public IEnumerable<ImageType> GetSupportedImages(IHasImages item)
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{
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return new List<ImageType> { ImageType.Primary };
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}
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public Task<DynamicImageResponse> GetImage(IHasImages item, ImageType type, CancellationToken cancellationToken)
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{
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var audio = (Audio)item;
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// Can't extract if we didn't find a video stream in the file
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if (!audio.HasEmbeddedImage)
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{
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return Task.FromResult(new DynamicImageResponse { HasImage = false });
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}
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return GetImage((Audio)item, cancellationToken);
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}
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public async Task<DynamicImageResponse> GetImage(Audio item, CancellationToken cancellationToken)
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{
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var path = GetAudioImagePath(item);
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if (!File.Exists(path))
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{
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var semaphore = GetLock(path);
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// Acquire a lock
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await semaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
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try
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{
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// Check again in case it was saved while waiting for the lock
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if (!File.Exists(path))
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{
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Directory.CreateDirectory(Path.GetDirectoryName(path));
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using (var stream = await _mediaEncoder.ExtractAudioImage(item.Path, cancellationToken).ConfigureAwait(false))
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{
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using (var fileStream = _fileSystem.GetFileStream(path, FileMode.Create, FileAccess.Write, FileShare.Read, true))
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{
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await stream.CopyToAsync(fileStream).ConfigureAwait(false);
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}
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}
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}
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}
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finally
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{
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semaphore.Release();
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}
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}
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return new DynamicImageResponse
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{
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HasImage = true,
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Path = path
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};
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}
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private string GetAudioImagePath(Audio item)
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{
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var album = item.Parent as MusicAlbum;
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var filename = item.Album ?? string.Empty;
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filename += item.Artists.FirstOrDefault() ?? string.Empty;
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filename += album == null ? item.Id.ToString("N") + "_primary" + item.DateModified.Ticks : album.Id.ToString("N") + album.DateModified.Ticks + "_primary";
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filename = filename.GetMD5() + ".jpg";
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var prefix = filename.Substring(0, 1);
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return Path.Combine(AudioImagesPath, prefix, filename);
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}
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public string AudioImagesPath
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{
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get
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{
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return Path.Combine(_config.ApplicationPaths.CachePath, "extracted-audio-images");
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}
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}
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/// <summary>
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/// Gets the lock.
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/// </summary>
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/// <param name="filename">The filename.</param>
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/// <returns>SemaphoreSlim.</returns>
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private SemaphoreSlim GetLock(string filename)
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{
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return _locks.GetOrAdd(filename, key => new SemaphoreSlim(1, 1));
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}
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public string Name
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{
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get { return "Image Extractor"; }
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}
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public bool Supports(IHasImages item)
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{
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return item.LocationType == LocationType.FileSystem && item is Audio;
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}
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public bool HasChanged(IHasMetadata item, IDirectoryService directoryService, DateTime date)
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{
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return item.DateModified > date;
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}
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}
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}
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