2013-09-14 17:19:32 -04:00
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using MediaBrowser.Common.IO;
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using MediaBrowser.Common.MediaInfo;
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using MediaBrowser.Controller;
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using MediaBrowser.Controller.Configuration;
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using MediaBrowser.Controller.Entities;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Controller.MediaInfo;
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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 MediaBrowser.Model.Logging;
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using System;
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using System.Collections.Concurrent;
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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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class VideoImageProvider : BaseMetadataProvider
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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 _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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/// The _media encoder
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/// </summary>
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private readonly IMediaEncoder _mediaEncoder;
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private readonly IIsoManager _isoManager;
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public VideoImageProvider(ILogManager logManager, IServerConfigurationManager configurationManager, IMediaEncoder mediaEncoder, IIsoManager isoManager)
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: base(logManager, configurationManager)
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{
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_mediaEncoder = mediaEncoder;
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_isoManager = isoManager;
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2013-10-01 16:47:33 -04:00
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ImageCache = new FileSystemRepository(Kernel.Instance.FFMpegManager.VideoImagesDataPath);
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2013-09-14 17:19:32 -04:00
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}
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/// <summary>
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/// Gets a value indicating whether [refresh on version change].
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/// </summary>
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/// <value><c>true</c> if [refresh on version change]; otherwise, <c>false</c>.</value>
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protected override bool RefreshOnVersionChange
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{
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get
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{
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return true;
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}
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}
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/// <summary>
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/// Gets the provider version.
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/// </summary>
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/// <value>The provider version.</value>
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protected override string ProviderVersion
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{
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get
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{
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return "1";
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}
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}
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/// <summary>
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/// Supportses the specified item.
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/// </summary>
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/// <param name="item">The item.</param>
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/// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
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public override bool Supports(BaseItem item)
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{
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return item.LocationType == LocationType.FileSystem && item is Video;
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}
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/// <summary>
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/// Needses the refresh internal.
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/// </summary>
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/// <param name="item">The item.</param>
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/// <param name="providerInfo">The provider info.</param>
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/// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
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protected override bool NeedsRefreshInternal(BaseItem item, BaseProviderInfo providerInfo)
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{
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var video = (Video)item;
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if (!QualifiesForExtraction(video))
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{
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return false;
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}
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return base.NeedsRefreshInternal(item, providerInfo);
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}
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/// <summary>
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/// Qualifieses for extraction.
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/// </summary>
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/// <param name="item">The item.</param>
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/// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
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private bool QualifiesForExtraction(Video item)
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{
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if (!ConfigurationManager.Configuration.EnableVideoImageExtraction)
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{
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return false;
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}
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if (!string.IsNullOrEmpty(item.PrimaryImagePath))
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{
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return false;
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}
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// No support for this
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if (item.VideoType == VideoType.HdDvd)
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{
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return false;
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}
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// Can't extract from iso's if we weren't unable to determine iso type
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if (item.VideoType == VideoType.Iso && !item.IsoType.HasValue)
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{
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return false;
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}
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// Can't extract if we didn't find a video stream in the file
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2013-12-05 22:39:44 -05:00
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if (!item.DefaultVideoStreamIndex.HasValue)
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2013-09-14 17:19:32 -04:00
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{
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return false;
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}
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return true;
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}
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/// <summary>
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/// Override this to return the date that should be compared to the last refresh date
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/// to determine if this provider should be re-fetched.
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/// </summary>
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/// <param name="item">The item.</param>
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/// <returns>DateTime.</returns>
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protected override DateTime CompareDate(BaseItem item)
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{
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return item.DateModified;
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}
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/// <summary>
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/// Gets the priority.
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/// </summary>
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/// <value>The priority.</value>
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public override MetadataProviderPriority Priority
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{
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get { return MetadataProviderPriority.Last; }
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}
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public override ItemUpdateType ItemUpdateType
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{
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get
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{
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return ItemUpdateType.ImageUpdate;
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}
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}
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/// <summary>
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/// Fetches metadata and returns true or false indicating if any work that requires persistence was done
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/// </summary>
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/// <param name="item">The item.</param>
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/// <param name="force">if set to <c>true</c> [force].</param>
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/// <param name="cancellationToken">The cancellation token.</param>
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/// <returns>Task{System.Boolean}.</returns>
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2013-12-06 15:07:34 -05:00
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public override async Task<bool> FetchAsync(BaseItem item, bool force, BaseProviderInfo providerInfo, CancellationToken cancellationToken)
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2013-09-14 17:19:32 -04:00
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{
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2013-11-30 01:08:14 -05:00
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item.ValidateImages();
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2013-09-14 17:19:32 -04:00
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var video = (Video)item;
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// Double check this here in case force was used
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if (QualifiesForExtraction(video))
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{
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try
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{
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await ExtractImage(video, cancellationToken).ConfigureAwait(false);
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}
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catch (Exception ex)
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{
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// Swallow this so that we don't keep on trying over and over again
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Logger.ErrorException("Error extracting image for {0}", ex, item.Name);
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}
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}
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2013-12-06 15:07:34 -05:00
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SetLastRefreshed(item, DateTime.UtcNow, providerInfo);
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2013-09-14 17:19:32 -04:00
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return true;
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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="item">The item.</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 item, CancellationToken cancellationToken)
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{
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cancellationToken.ThrowIfCancellationRequested();
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var filename = item.Path + "_" + item.DateModified.Ticks + "_primary";
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var path = ImageCache.GetResourcePath(filename, ".jpg");
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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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// Check again
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if (!File.Exists(path))
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{
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try
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{
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var parentPath = Path.GetDirectoryName(path);
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2013-10-01 14:24:27 -04:00
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Directory.CreateDirectory(parentPath);
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2013-09-14 17:19:32 -04:00
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await ExtractImageInternal(item, path, cancellationToken).ConfigureAwait(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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// Image is already in the cache
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item.PrimaryImagePath = path;
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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 ExtractImageInternal(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, video.Video3DFormat, 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 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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}
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}
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