jellyfin-server/MediaBrowser.Server.Implementations/ScheduledTasks/VideoImagesTask.cs

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C#
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using MediaBrowser.Common.IO;
using MediaBrowser.Common.MediaInfo;
using MediaBrowser.Common.ScheduledTasks;
using MediaBrowser.Controller;
using MediaBrowser.Controller.Entities;
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using MediaBrowser.Controller.Entities.Movies;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.Providers.MediaInfo;
using MediaBrowser.Model.Entities;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Server.Implementations.ScheduledTasks
{
/// <summary>
/// Class VideoImagesTask
/// </summary>
public class VideoImagesTask : IScheduledTask
{
/// <summary>
/// Gets or sets the image cache.
/// </summary>
/// <value>The image cache.</value>
public FileSystemRepository ImageCache { get; set; }
/// <summary>
/// The _library manager
/// </summary>
private readonly ILibraryManager _libraryManager;
/// <summary>
/// The _media encoder
/// </summary>
private readonly IMediaEncoder _mediaEncoder;
/// <summary>
/// The _iso manager
/// </summary>
private readonly IIsoManager _isoManager;
/// <summary>
/// The _locks
/// </summary>
private readonly ConcurrentDictionary<string, SemaphoreSlim> _locks = new ConcurrentDictionary<string, SemaphoreSlim>();
/// <summary>
/// Initializes a new instance of the <see cref="AudioImagesTask" /> class.
/// </summary>
/// <param name="libraryManager">The library manager.</param>
/// <param name="mediaEncoder">The media encoder.</param>
/// <param name="isoManager">The iso manager.</param>
public VideoImagesTask(ILibraryManager libraryManager, IMediaEncoder mediaEncoder, IIsoManager isoManager)
{
_libraryManager = libraryManager;
_mediaEncoder = mediaEncoder;
_isoManager = isoManager;
ImageCache = new FileSystemRepository(Kernel.Instance.FFMpegManager.VideoImagesDataPath);
}
/// <summary>
/// Gets the name of the task
/// </summary>
/// <value>The name.</value>
public string Name
{
get { return "Video image extraction"; }
}
/// <summary>
/// Gets the description.
/// </summary>
/// <value>The description.</value>
public string Description
{
get { return "Extracts images from audio files that do not have external images."; }
}
/// <summary>
/// Gets the category.
/// </summary>
/// <value>The category.</value>
public string Category
{
get { return "Library"; }
}
/// <summary>
/// Executes the task
/// </summary>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="progress">The progress.</param>
/// <returns>Task.</returns>
public async Task Execute(CancellationToken cancellationToken, IProgress<double> progress)
{
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var allItems = _libraryManager.RootFolder.RecursiveChildren.ToList();
var localTrailers = allItems.SelectMany(i => i.LocalTrailers);
var videos = allItems.OfType<Video>().ToList();
var items = videos;
items.AddRange(localTrailers);
items.AddRange(videos.OfType<Movie>().SelectMany(i => i.SpecialFeatures).ToList());
items = items.Where(i =>
{
if (!string.IsNullOrEmpty(i.PrimaryImagePath))
{
return false;
}
if (i.LocationType != LocationType.FileSystem)
{
return false;
}
if (i.VideoType == VideoType.HdDvd)
{
return false;
}
if (i.VideoType == VideoType.Iso && !i.IsoType.HasValue)
{
return false;
}
return i.MediaStreams != null && i.MediaStreams.Any(m => m.Type == MediaStreamType.Video);
}).ToList();
progress.Report(0);
var numComplete = 0;
foreach (var item in items)
{
cancellationToken.ThrowIfCancellationRequested();
var filename = item.Id + "_" + item.DateModified.Ticks + "_primary";
var path = ImageCache.GetResourcePath(filename, ".jpg");
var success = true;
if (!ImageCache.ContainsFilePath(path))
{
var semaphore = GetLock(path);
// Acquire a lock
await semaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
// Check again
if (!ImageCache.ContainsFilePath(path))
{
try
{
await ExtractImage(item, path, cancellationToken).ConfigureAwait(false);
}
catch
{
success = false;
}
finally
{
semaphore.Release();
}
}
else
{
semaphore.Release();
}
}
numComplete++;
double percent = numComplete;
percent /= items.Count;
progress.Report(100 * percent);
if (success)
{
// Image is already in the cache
item.PrimaryImagePath = path;
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await _libraryManager.SaveItem(item, cancellationToken).ConfigureAwait(false);
}
}
progress.Report(100);
}
/// <summary>
/// Extracts the image.
/// </summary>
/// <param name="video">The video.</param>
/// <param name="path">The path.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
private async Task ExtractImage(Video video, string path, CancellationToken cancellationToken)
{
var isoMount = await MountIsoIfNeeded(video, cancellationToken).ConfigureAwait(false);
try
{
// If we know the duration, grab it from 10% into the video. Otherwise just 10 seconds in.
// Always use 10 seconds for dvd because our duration could be out of whack
var imageOffset = video.VideoType != VideoType.Dvd && video.RunTimeTicks.HasValue &&
video.RunTimeTicks.Value > 0
? TimeSpan.FromTicks(Convert.ToInt64(video.RunTimeTicks.Value * .1))
: TimeSpan.FromSeconds(10);
InputType type;
var inputPath = MediaEncoderHelpers.GetInputArgument(video, isoMount, out type);
await _mediaEncoder.ExtractImage(inputPath, type, imageOffset, path, cancellationToken).ConfigureAwait(false);
video.PrimaryImagePath = path;
}
finally
{
if (isoMount != null)
{
isoMount.Dispose();
}
}
}
/// <summary>
/// The null mount task result
/// </summary>
protected readonly Task<IIsoMount> NullMountTaskResult = Task.FromResult<IIsoMount>(null);
/// <summary>
/// Mounts the iso if needed.
/// </summary>
/// <param name="item">The item.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task{IIsoMount}.</returns>
protected Task<IIsoMount> MountIsoIfNeeded(Video item, CancellationToken cancellationToken)
{
if (item.VideoType == VideoType.Iso)
{
return _isoManager.Mount(item.Path, cancellationToken);
}
return NullMountTaskResult;
}
/// <summary>
/// Gets the default triggers.
/// </summary>
/// <returns>IEnumerable{BaseTaskTrigger}.</returns>
public IEnumerable<ITaskTrigger> GetDefaultTriggers()
{
return new ITaskTrigger[]
{
new DailyTrigger { TimeOfDay = TimeSpan.FromHours(2) }
};
}
/// <summary>
/// Gets the lock.
/// </summary>
/// <param name="filename">The filename.</param>
/// <returns>System.Object.</returns>
private SemaphoreSlim GetLock(string filename)
{
return _locks.GetOrAdd(filename, key => new SemaphoreSlim(1, 1));
}
}
}