jellyfin/Emby.Server.Implementations/MediaEncoder/EncodingManager.cs

273 lines
10 KiB
C#

#nullable disable
#pragma warning disable CS1591
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Jellyfin.Extensions;
using MediaBrowser.Controller.Chapters;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.MediaEncoding;
using MediaBrowser.Controller.Providers;
using MediaBrowser.Model.Configuration;
using MediaBrowser.Model.Dto;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.IO;
using Microsoft.Extensions.Logging;
namespace Emby.Server.Implementations.MediaEncoder
{
public class EncodingManager : IEncodingManager
{
private readonly IFileSystem _fileSystem;
private readonly ILogger<EncodingManager> _logger;
private readonly IMediaEncoder _encoder;
private readonly IChapterManager _chapterManager;
private readonly ILibraryManager _libraryManager;
/// <summary>
/// The first chapter ticks.
/// </summary>
private static readonly long _firstChapterTicks = TimeSpan.FromSeconds(15).Ticks;
public EncodingManager(
ILogger<EncodingManager> logger,
IFileSystem fileSystem,
IMediaEncoder encoder,
IChapterManager chapterManager,
ILibraryManager libraryManager)
{
_logger = logger;
_fileSystem = fileSystem;
_encoder = encoder;
_chapterManager = chapterManager;
_libraryManager = libraryManager;
}
/// <summary>
/// Gets the chapter images data path.
/// </summary>
/// <value>The chapter images data path.</value>
private static string GetChapterImagesPath(BaseItem 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>
/// <param name="libraryOptions">The library options for 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, LibraryOptions libraryOptions)
{
if (video.IsPlaceHolder)
{
return false;
}
if (libraryOptions is null || !libraryOptions.EnableChapterImageExtraction)
{
return false;
}
if (video.IsShortcut)
{
return false;
}
if (!video.IsCompleteMedia)
{
return false;
}
// Can't extract images if there are no video streams
return video.DefaultVideoStreamIndex.HasValue;
}
private long GetAverageDurationBetweenChapters(IReadOnlyList<ChapterInfo> chapters)
{
if (chapters.Count < 2)
{
return 0;
}
long sum = 0;
for (int i = 1; i < chapters.Count; i++)
{
sum += chapters[i].StartPositionTicks - chapters[i - 1].StartPositionTicks;
}
return sum / chapters.Count;
}
public async Task<bool> RefreshChapterImages(Video video, IDirectoryService directoryService, IReadOnlyList<ChapterInfo> chapters, bool extractImages, bool saveChapters, CancellationToken cancellationToken)
{
if (chapters.Count == 0)
{
return true;
}
var libraryOptions = _libraryManager.GetLibraryOptions(video);
if (!IsEligibleForChapterImageExtraction(video, libraryOptions))
{
extractImages = false;
}
var averageChapterDuration = GetAverageDurationBetweenChapters(chapters);
var threshold = TimeSpan.FromSeconds(1).Ticks;
if (averageChapterDuration < threshold)
{
_logger.LogInformation("Skipping chapter image extraction for {Video} as the average chapter duration {AverageDuration} was lower than the minimum threshold {Threshold}", video.Name, averageChapterDuration, threshold);
extractImages = false;
}
var success = true;
var changesMade = false;
var runtimeTicks = video.RunTimeTicks ?? 0;
var currentImages = GetSavedChapterImages(video, directoryService);
foreach (var chapter in chapters)
{
if (chapter.StartPositionTicks >= runtimeTicks)
{
_logger.LogInformation("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, StringComparison.OrdinalIgnoreCase))
{
if (extractImages)
{
cancellationToken.ThrowIfCancellationRequested();
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 inputPath = video.Path;
Directory.CreateDirectory(Path.GetDirectoryName(path));
var container = video.Container;
var mediaSource = new MediaSourceInfo
{
VideoType = video.VideoType,
IsoType = video.IsoType,
Protocol = video.PathProtocol.Value,
};
var tempFile = await _encoder.ExtractVideoImage(inputPath, container, mediaSource, video.GetDefaultVideoStream(), video.Video3DFormat, time, cancellationToken).ConfigureAwait(false);
File.Copy(tempFile, path, true);
try
{
_fileSystem.DeleteFile(tempFile);
}
catch (IOException ex)
{
_logger.LogError(ex, "Error deleting temporary chapter image encoding file {Path}", tempFile);
}
chapter.ImagePath = path;
chapter.ImageDateModified = _fileSystem.GetLastWriteTimeUtc(path);
changesMade = true;
}
catch (Exception ex)
{
_logger.LogError(ex, "Error extracting chapter images for {0}", 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;
}
else if (libraryOptions?.EnableChapterImageExtraction != true)
{
// We have an image for the current chapter but the user has disabled chapter image extraction -> delete this chapter's image
chapter.ImagePath = null;
changesMade = true;
}
}
if (saveChapters && changesMade)
{
_chapterManager.SaveChapters(video.Id, chapters);
}
DeleteDeadImages(currentImages, chapters);
return success;
}
private string GetChapterImagePath(Video video, long chapterPositionTicks)
{
var filename = video.DateModified.Ticks.ToString(CultureInfo.InvariantCulture) + "_" + chapterPositionTicks.ToString(CultureInfo.InvariantCulture) + ".jpg";
return Path.Combine(GetChapterImagesPath(video), filename);
}
private static IReadOnlyList<string> GetSavedChapterImages(Video video, IDirectoryService directoryService)
{
var path = GetChapterImagesPath(video);
if (!Directory.Exists(path))
{
return Array.Empty<string>();
}
try
{
return directoryService.GetFilePaths(path);
}
catch (IOException)
{
return Array.Empty<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.AsSpan()), StringComparison.OrdinalIgnoreCase))
.ToList();
foreach (var image in deadImages)
{
_logger.LogDebug("Deleting dead chapter image {Path}", image);
try
{
_fileSystem.DeleteFile(image);
}
catch (IOException ex)
{
_logger.LogError(ex, "Error deleting {Path}.", image);
}
}
}
}
}