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