jellyfin/Emby.Server.Implementations/MediaEncoder/EncodingManager.cs
2017-08-19 15:43:35 -04:00

230 lines
8.3 KiB
C#

using MediaBrowser.Controller.Chapters;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Entities.Movies;
using MediaBrowser.Controller.Entities.TV;
using MediaBrowser.Controller.MediaEncoding;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.Logging;
using MediaBrowser.Model.MediaInfo;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using MediaBrowser.Controller.IO;
using MediaBrowser.Model.IO;
using MediaBrowser.Controller.Library;
namespace Emby.Server.Implementations.MediaEncoder
{
public class EncodingManager : IEncodingManager
{
private readonly CultureInfo _usCulture = new CultureInfo("en-US");
private readonly IFileSystem _fileSystem;
private readonly ILogger _logger;
private readonly IMediaEncoder _encoder;
private readonly IChapterManager _chapterManager;
private readonly ILibraryManager _libraryManager;
public EncodingManager(IFileSystem fileSystem,
ILogger logger,
IMediaEncoder encoder,
IChapterManager chapterManager, ILibraryManager libraryManager)
{
_fileSystem = fileSystem;
_logger = logger;
_encoder = encoder;
_chapterManager = chapterManager;
_libraryManager = libraryManager;
}
/// <summary>
/// Gets the chapter images data path.
/// </summary>
/// <value>The chapter images data path.</value>
private string GetChapterImagesPath(IHasMetadata item)
{
return Path.Combine(item.GetInternalMetadataPath(), "chapters");
}
/// <summary>
/// Determines whether [is eligible for chapter image extraction] [the specified video].
/// </summary>
/// <param name="video">The video.</param>
/// <returns><c>true</c> if [is eligible for chapter image extraction] [the specified video]; otherwise, <c>false</c>.</returns>
private bool IsEligibleForChapterImageExtraction(Video video)
{
if (video.IsPlaceHolder)
{
return false;
}
var libraryOptions = _libraryManager.GetLibraryOptions(video);
if (libraryOptions != null)
{
if (!libraryOptions.EnableChapterImageExtraction)
{
return false;
}
}
else
{
return false;
}
// Can't extract images if there are no video streams
return video.DefaultVideoStreamIndex.HasValue;
}
/// <summary>
/// The first chapter ticks
/// </summary>
private static readonly long FirstChapterTicks = TimeSpan.FromSeconds(15).Ticks;
public async Task<bool> RefreshChapterImages(Video video, List<ChapterInfo> chapters, bool extractImages, bool saveChapters, CancellationToken cancellationToken)
{
if (!IsEligibleForChapterImageExtraction(video))
{
extractImages = false;
}
var success = true;
var changesMade = false;
var runtimeTicks = video.RunTimeTicks ?? 0;
var currentImages = GetSavedChapterImages(video);
foreach (var chapter in chapters)
{
if (chapter.StartPositionTicks >= runtimeTicks)
{
_logger.Info("Stopping chapter extraction for {0} because a chapter was found with a position greater than the runtime.", video.Name);
break;
}
var path = GetChapterImagePath(video, chapter.StartPositionTicks);
if (!currentImages.Contains(path, StringComparer.OrdinalIgnoreCase))
{
if (extractImages)
{
if (video.VideoType == VideoType.Iso)
{
continue;
}
if (video.VideoType == VideoType.BluRay || video.VideoType == VideoType.Dvd)
{
continue;
}
try
{
// Add some time for the first chapter to make sure we don't end up with a black image
var time = chapter.StartPositionTicks == 0 ? TimeSpan.FromTicks(Math.Min(FirstChapterTicks, video.RunTimeTicks ?? 0)) : TimeSpan.FromTicks(chapter.StartPositionTicks);
var protocol = MediaProtocol.File;
var inputPath = MediaEncoderHelpers.GetInputArgument(_fileSystem, video.Path, protocol, null, new string[] { });
_fileSystem.CreateDirectory(_fileSystem.GetDirectoryName(path));
var container = video.Container;
var tempFile = await _encoder.ExtractVideoImage(inputPath, container, protocol, video.GetDefaultVideoStream(), video.Video3DFormat, time, cancellationToken).ConfigureAwait(false);
_fileSystem.CopyFile(tempFile, path, true);
try
{
_fileSystem.DeleteFile(tempFile);
}
catch
{
}
chapter.ImagePath = path;
chapter.ImageDateModified = _fileSystem.GetLastWriteTimeUtc(path);
changesMade = true;
}
catch (Exception ex)
{
_logger.ErrorException("Error extracting chapter images for {0}", ex, string.Join(",", video.Path));
success = false;
break;
}
}
else if (!string.IsNullOrEmpty(chapter.ImagePath))
{
chapter.ImagePath = null;
changesMade = true;
}
}
else if (!string.Equals(path, chapter.ImagePath, StringComparison.OrdinalIgnoreCase))
{
chapter.ImagePath = path;
chapter.ImageDateModified = _fileSystem.GetLastWriteTimeUtc(path);
changesMade = true;
}
}
if (saveChapters && changesMade)
{
await _chapterManager.SaveChapters(video.Id.ToString(), chapters).ConfigureAwait(false);
}
DeleteDeadImages(currentImages, chapters);
return success;
}
private string GetChapterImagePath(Video video, long chapterPositionTicks)
{
var filename = video.DateModified.Ticks.ToString(_usCulture) + "_" + chapterPositionTicks.ToString(_usCulture) + ".jpg";
return Path.Combine(GetChapterImagesPath(video), filename);
}
private List<string> GetSavedChapterImages(Video video)
{
var path = GetChapterImagesPath(video);
try
{
return _fileSystem.GetFilePaths(path)
.ToList();
}
catch (IOException)
{
return new List<string>();
}
}
private void DeleteDeadImages(IEnumerable<string> images, IEnumerable<ChapterInfo> chapters)
{
var deadImages = images
.Except(chapters.Select(i => i.ImagePath).Where(i => !string.IsNullOrEmpty(i)), StringComparer.OrdinalIgnoreCase)
.Where(i => BaseItem.SupportedImageExtensions.Contains(Path.GetExtension(i), StringComparer.OrdinalIgnoreCase))
.ToList();
foreach (var image in deadImages)
{
_logger.Debug("Deleting dead chapter image {0}", image);
try
{
_fileSystem.DeleteFile(image);
}
catch (IOException ex)
{
_logger.ErrorException("Error deleting {0}.", ex, image);
}
}
}
}
}