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230 lines
7.5 KiB
C#
230 lines
7.5 KiB
C#
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.Persistence;
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using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.Logging;
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using MediaBrowser.Model.Serialization;
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using MoreLinq;
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using System;
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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.Server.Implementations.ScheduledTasks
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{
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/// <summary>
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/// Class ChapterImagesTask
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/// </summary>
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class ChapterImagesTask : IScheduledTask
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{
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private readonly IJsonSerializer _jsonSerializer;
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/// <summary>
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/// The _kernel
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/// </summary>
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private readonly Kernel _kernel;
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/// <summary>
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/// The _logger
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/// </summary>
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private readonly ILogger _logger;
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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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private readonly List<Video> _newlyAddedItems = new List<Video>();
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private const int NewItemDelay = 60000;
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/// <summary>
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/// The current new item timer
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/// </summary>
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/// <value>The new item timer.</value>
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private Timer NewItemTimer { get; set; }
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private readonly IItemRepository _itemRepo;
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/// <summary>
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/// Initializes a new instance of the <see cref="ChapterImagesTask" /> class.
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/// </summary>
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/// <param name="kernel">The kernel.</param>
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/// <param name="logManager">The log manager.</param>
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/// <param name="libraryManager">The library manager.</param>
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/// <param name="jsonSerializer">The json serializer.</param>
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/// <param name="itemRepo">The item repo.</param>
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public ChapterImagesTask(Kernel kernel, ILogManager logManager, ILibraryManager libraryManager, IJsonSerializer jsonSerializer, IItemRepository itemRepo)
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{
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_kernel = kernel;
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_logger = logManager.GetLogger(GetType().Name);
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_libraryManager = libraryManager;
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_jsonSerializer = jsonSerializer;
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_itemRepo = itemRepo;
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libraryManager.ItemAdded += libraryManager_ItemAdded;
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libraryManager.ItemUpdated += libraryManager_ItemAdded;
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}
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void libraryManager_ItemAdded(object sender, ItemChangeEventArgs e)
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{
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var video = e.Item as Video;
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if (video != null)
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{
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lock (_newlyAddedItems)
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{
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_newlyAddedItems.Add(video);
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if (NewItemTimer == null)
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{
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NewItemTimer = new Timer(NewItemTimerCallback, null, NewItemDelay, Timeout.Infinite);
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}
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else
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{
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NewItemTimer.Change(NewItemDelay, Timeout.Infinite);
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}
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}
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}
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}
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private async void NewItemTimerCallback(object state)
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{
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List<Video> newItems;
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// Lock the list and release all resources
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lock (_newlyAddedItems)
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{
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newItems = _newlyAddedItems.DistinctBy(i => i.Id).ToList();
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_newlyAddedItems.Clear();
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NewItemTimer.Dispose();
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NewItemTimer = null;
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}
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// Limit to video files to reduce changes of ffmpeg crash dialog
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foreach (var item in newItems
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.Where(i => i.LocationType == LocationType.FileSystem && i.VideoType == VideoType.VideoFile && string.IsNullOrEmpty(i.PrimaryImagePath) && i.MediaStreams.Any(m => m.Type == MediaStreamType.Video))
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.Take(1))
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{
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try
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{
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var chapters = _itemRepo.GetChapters(item.Id).ToList();
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await _kernel.FFMpegManager.PopulateChapterImages(item, chapters, true, true, CancellationToken.None);
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}
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catch (Exception ex)
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{
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_logger.ErrorException("Error creating image for {0}", ex, item.Name);
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}
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}
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}
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/// <summary>
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/// Creates the triggers that define when the task will run
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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(4) }
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};
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}
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/// <summary>
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/// Returns the task to be executed
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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 videos = _libraryManager.RootFolder.RecursiveChildren
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.OfType<Video>()
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.ToList();
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var numComplete = 0;
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var failHistoryPath = Path.Combine(_kernel.FFMpegManager.VideoImagesDataPath, "failures.txt");
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List<string> previouslyFailedImages;
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try
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{
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previouslyFailedImages = File.ReadAllText(failHistoryPath)
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.Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries)
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.ToList();
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}
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catch (FileNotFoundException)
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{
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previouslyFailedImages = new List<string>();
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}
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foreach (var video in videos)
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{
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cancellationToken.ThrowIfCancellationRequested();
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var key = video.Path + video.DateModified.Ticks;
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var extract = !previouslyFailedImages.Contains(key, StringComparer.OrdinalIgnoreCase);
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var chapters = _itemRepo.GetChapters(video.Id).ToList();
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var success = await _kernel.FFMpegManager.PopulateChapterImages(video, chapters, extract, true, cancellationToken);
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if (!success)
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{
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previouslyFailedImages.Add(key);
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var parentPath = Path.GetDirectoryName(failHistoryPath);
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if (!Directory.Exists(parentPath))
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{
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Directory.CreateDirectory(parentPath);
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}
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File.WriteAllText(failHistoryPath, string.Join("|", previouslyFailedImages.ToArray()));
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}
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numComplete++;
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double percent = numComplete;
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percent /= videos.Count;
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progress.Report(100 * percent);
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}
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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 "Chapter 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 "Creates thumbnails for videos that have chapters."; }
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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
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{
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return "Library";
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}
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}
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}
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}
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