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extract images for small numbers of items on discovery

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Luke Pulverenti
2013-05-03 11:08:02 -04:00
parent ceaae430c6
commit 43845b4052
5 changed files with 350 additions and 178 deletions
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184
MediaBrowser.Server.Implementations/ScheduledTasks/VideoImagesTask.cs
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@@ -13,6 +13,8 @@ using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using MediaBrowser.Model.Logging;
using MoreLinq;
namespace MediaBrowser.Server.Implementations.ScheduledTasks
{
@@ -41,26 +43,96 @@ namespace MediaBrowser.Server.Implementations.ScheduledTasks
/// </summary>
private readonly IIsoManager _isoManager;
private readonly ILogger _logger;
/// <summary>
/// The _locks
/// </summary>
private readonly ConcurrentDictionary<string, SemaphoreSlim> _locks = new ConcurrentDictionary<string, SemaphoreSlim>();
private readonly List<BaseItem> _newlyAddedItems = new List<BaseItem>();
private const int NewItemDelay = 300000;
/// <summary>
/// The current new item timer
/// </summary>
/// <value>The new item timer.</value>
private Timer NewItemTimer { get; set; }
/// <summary>
/// Initializes a new instance of the <see cref="AudioImagesTask" /> class.
/// </summary>
/// <param name="libraryManager">The library manager.</param>
/// <param name="logManager">The log manager.</param>
/// <param name="mediaEncoder">The media encoder.</param>
/// <param name="isoManager">The iso manager.</param>
public VideoImagesTask(ILibraryManager libraryManager, IMediaEncoder mediaEncoder, IIsoManager isoManager)
public VideoImagesTask(ILibraryManager libraryManager, ILogManager logManager, IMediaEncoder mediaEncoder, IIsoManager isoManager)
{
_libraryManager = libraryManager;
_mediaEncoder = mediaEncoder;
_isoManager = isoManager;
_logger = logManager.GetLogger(GetType().Name);
ImageCache = new FileSystemRepository(Kernel.Instance.FFMpegManager.VideoImagesDataPath);
libraryManager.ItemAdded += libraryManager_ItemAdded;
libraryManager.ItemUpdated += libraryManager_ItemAdded;
}
/// <summary>
/// Handles the ItemAdded event of the libraryManager control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="ItemChangeEventArgs"/> instance containing the event data.</param>
void libraryManager_ItemAdded(object sender, ItemChangeEventArgs e)
{
lock (_newlyAddedItems)
{
_newlyAddedItems.Add(e.Item);
if (NewItemTimer == null)
{
NewItemTimer = new Timer(NewItemTimerCallback, null, NewItemDelay, Timeout.Infinite);
}
else
{
NewItemTimer.Change(NewItemDelay, Timeout.Infinite);
}
}
}
/// <summary>
/// News the item timer callback.
/// </summary>
/// <param name="state">The state.</param>
private async void NewItemTimerCallback(object state)
{
List<BaseItem> newItems;
// Lock the list and release all resources
lock (_newlyAddedItems)
{
newItems = _newlyAddedItems.DistinctBy(i => i.Id).ToList();
_newlyAddedItems.Clear();
NewItemTimer.Dispose();
NewItemTimer = null;
}
foreach (var item in GetItemsForExtraction(newItems.Take(5)))
{
try
{
await ExtractImage(item, CancellationToken.None).ConfigureAwait(false);
}
catch (Exception ex)
{
_logger.ErrorException("Error creating image for {0}", ex, item.Name);
}
}
}
/// <summary>
/// Gets the name of the task
/// </summary>
@@ -96,7 +168,42 @@ namespace MediaBrowser.Server.Implementations.ScheduledTasks
/// <returns>Task.</returns>
public async Task Execute(CancellationToken cancellationToken, IProgress<double> progress)
{
var allItems = _libraryManager.RootFolder.RecursiveChildren.ToList();
var items = GetItemsForExtraction(_libraryManager.RootFolder.RecursiveChildren).ToList();
progress.Report(0);
var numComplete = 0;
foreach (var item in items)
{
try
{
await ExtractImage(item, cancellationToken).ConfigureAwait(false);
}
catch
{
// Already logged at lower levels.
// Just don't let the task fail
}
numComplete++;
double percent = numComplete;
percent /= items.Count;
progress.Report(100 * percent);
}
progress.Report(100);
}
/// <summary>
/// Gets the items for extraction.
/// </summary>
/// <param name="sourceItems">The source items.</param>
/// <returns>IEnumerable{BaseItem}.</returns>
private IEnumerable<Video> GetItemsForExtraction(IEnumerable<BaseItem> sourceItems)
{
var allItems = sourceItems.ToList();
var localTrailers = allItems.SelectMany(i => i.LocalTrailers);
var themeVideos = allItems.SelectMany(i => i.ThemeVideos);
@@ -108,7 +215,7 @@ namespace MediaBrowser.Server.Implementations.ScheduledTasks
items.AddRange(themeVideos);
items.AddRange(videos.OfType<Movie>().SelectMany(i => i.SpecialFeatures).ToList());
items = items.Where(i =>
return items.Where(i =>
{
if (!string.IsNullOrEmpty(i.PrimaryImagePath))
{
@@ -131,69 +238,54 @@ namespace MediaBrowser.Server.Implementations.ScheduledTasks
}
return i.MediaStreams != null && i.MediaStreams.Any(m => m.Type == MediaStreamType.Video);
}).ToList();
});
}
progress.Report(0);
/// <summary>
/// Extracts the image.
/// </summary>
/// <param name="item">The item.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
private async Task ExtractImage(Video item, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
var numComplete = 0;
var filename = item.Id + "_" + item.DateModified.Ticks + "_primary";
foreach (var item in items)
var path = ImageCache.GetResourcePath(filename, ".jpg");
if (!ImageCache.ContainsFilePath(path))
{
cancellationToken.ThrowIfCancellationRequested();
var semaphore = GetLock(path);
var filename = item.Id + "_" + item.DateModified.Ticks + "_primary";
var path = ImageCache.GetResourcePath(filename, ".jpg");
var success = true;
// Acquire a lock
await semaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
// Check again
if (!ImageCache.ContainsFilePath(path))
{
var semaphore = GetLock(path);
// Acquire a lock
await semaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
// Check again
if (!ImageCache.ContainsFilePath(path))
try
{
try
{
await ExtractImage(item, path, cancellationToken).ConfigureAwait(false);
}
catch
{
success = false;
}
finally
{
semaphore.Release();
}
await ExtractImageInternal(item, path, cancellationToken).ConfigureAwait(false);
}
else
finally
{
semaphore.Release();
}
}
numComplete++;
double percent = numComplete;
percent /= items.Count;
progress.Report(100 * percent);
if (success)
{
// Image is already in the cache
item.PrimaryImagePath = path;
await _libraryManager.UpdateItem(item, cancellationToken).ConfigureAwait(false);
}
else
{
semaphore.Release();
}
}
progress.Report(100);
}
/// <summary>
/// Extracts the image.
/// </summary>
@@ -201,7 +293,7 @@ namespace MediaBrowser.Server.Implementations.ScheduledTasks
/// <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)
private async Task ExtractImageInternal(Video video, string path, CancellationToken cancellationToken)
{
var isoMount = await MountIsoIfNeeded(video, cancellationToken).ConfigureAwait(false);