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TrickplayManager.cs
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TrickplayManager.cs
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using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using AsyncKeyedLock;
using Jellyfin.Data.Entities;
using MediaBrowser.Common.Configuration;
using MediaBrowser.Controller.Configuration;
using MediaBrowser.Controller.Drawing;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.MediaEncoding;
using MediaBrowser.Controller.Trickplay;
using MediaBrowser.Model.Configuration;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.IO;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;
namespace Jellyfin.Server.Implementations.Trickplay;
/// <summary>
/// ITrickplayManager implementation.
/// </summary>
public class TrickplayManager : ITrickplayManager
{
private readonly ILogger<TrickplayManager> _logger;
private readonly IMediaEncoder _mediaEncoder;
private readonly IFileSystem _fileSystem;
private readonly EncodingHelper _encodingHelper;
private readonly ILibraryManager _libraryManager;
private readonly IServerConfigurationManager _config;
private readonly IImageEncoder _imageEncoder;
private readonly IDbContextFactory<JellyfinDbContext> _dbProvider;
private readonly IApplicationPaths _appPaths;
private static readonly AsyncNonKeyedLocker _resourcePool = new(1);
private static readonly string[] _trickplayImgExtensions = { ".jpg" };
/// <summary>
/// Initializes a new instance of the <see cref="TrickplayManager"/> class.
/// </summary>
/// <param name="logger">The logger.</param>
/// <param name="mediaEncoder">The media encoder.</param>
/// <param name="fileSystem">The file system.</param>
/// <param name="encodingHelper">The encoding helper.</param>
/// <param name="libraryManager">The library manager.</param>
/// <param name="config">The server configuration manager.</param>
/// <param name="imageEncoder">The image encoder.</param>
/// <param name="dbProvider">The database provider.</param>
/// <param name="appPaths">The application paths.</param>
public TrickplayManager(
ILogger<TrickplayManager> logger,
IMediaEncoder mediaEncoder,
IFileSystem fileSystem,
EncodingHelper encodingHelper,
ILibraryManager libraryManager,
IServerConfigurationManager config,
IImageEncoder imageEncoder,
IDbContextFactory<JellyfinDbContext> dbProvider,
IApplicationPaths appPaths)
{
_logger = logger;
_mediaEncoder = mediaEncoder;
_fileSystem = fileSystem;
_encodingHelper = encodingHelper;
_libraryManager = libraryManager;
_config = config;
_imageEncoder = imageEncoder;
_dbProvider = dbProvider;
_appPaths = appPaths;
}
/// <inheritdoc />
public async Task RefreshTrickplayDataAsync(Video video, bool replace, CancellationToken cancellationToken)
{
_logger.LogDebug("Trickplay refresh for {ItemId} (replace existing: {Replace})", video.Id, replace);
var options = _config.Configuration.TrickplayOptions;
foreach (var width in options.WidthResolutions)
{
cancellationToken.ThrowIfCancellationRequested();
await RefreshTrickplayDataInternal(
video,
replace,
width,
options,
cancellationToken).ConfigureAwait(false);
}
}
private async Task RefreshTrickplayDataInternal(
Video video,
bool replace,
int width,
TrickplayOptions options,
CancellationToken cancellationToken)
{
if (!CanGenerateTrickplay(video, options.Interval))
{
return;
}
var imgTempDir = string.Empty;
var outputDir = GetTrickplayDirectory(video, width);
using (await _resourcePool.LockAsync(cancellationToken).ConfigureAwait(false))
{
try
{
if (!replace && Directory.Exists(outputDir) && (await GetTrickplayResolutions(video.Id).ConfigureAwait(false)).ContainsKey(width))
{
_logger.LogDebug("Found existing trickplay files for {ItemId}. Exiting.", video.Id);
return;
}
// Extract images
// Note: Media sources under parent items exist as their own video/item as well. Only use this video stream for trickplay.
var mediaSource = video.GetMediaSources(false).Find(source => Guid.Parse(source.Id).Equals(video.Id));
if (mediaSource is null)
{
_logger.LogDebug("Found no matching media source for item {ItemId}", video.Id);
return;
}
var mediaPath = mediaSource.Path;
var mediaStream = mediaSource.VideoStream;
var container = mediaSource.Container;
_logger.LogInformation("Creating trickplay files at {Width} width, for {Path} [ID: {ItemId}]", width, mediaPath, video.Id);
imgTempDir = await _mediaEncoder.ExtractVideoImagesOnIntervalAccelerated(
mediaPath,
container,
mediaSource,
mediaStream,
width,
TimeSpan.FromMilliseconds(options.Interval),
options.EnableHwAcceleration,
options.ProcessThreads,
options.Qscale,
options.ProcessPriority,
_encodingHelper,
cancellationToken).ConfigureAwait(false);
if (string.IsNullOrEmpty(imgTempDir) || !Directory.Exists(imgTempDir))
{
throw new InvalidOperationException("Null or invalid directory from media encoder.");
}
var images = _fileSystem.GetFiles(imgTempDir, _trickplayImgExtensions, false, false)
.Select(i => i.FullName)
.OrderBy(i => i)
.ToList();
// Create tiles
var trickplayInfo = CreateTiles(images, width, options, outputDir);
// Save tiles info
try
{
if (trickplayInfo is not null)
{
trickplayInfo.ItemId = video.Id;
await SaveTrickplayInfo(trickplayInfo).ConfigureAwait(false);
_logger.LogInformation("Finished creation of trickplay files for {0}", mediaPath);
}
else
{
throw new InvalidOperationException("Null trickplay tiles info from CreateTiles.");
}
}
catch (Exception ex)
{
_logger.LogError(ex, "Error while saving trickplay tiles info.");
// Make sure no files stay in metadata folders on failure
// if tiles info wasn't saved.
Directory.Delete(outputDir, true);
}
}
catch (Exception ex)
{
_logger.LogError(ex, "Error creating trickplay images.");
}
finally
{
if (!string.IsNullOrEmpty(imgTempDir))
{
Directory.Delete(imgTempDir, true);
}
}
}
}
/// <inheritdoc />
public TrickplayInfo CreateTiles(List<string> images, int width, TrickplayOptions options, string outputDir)
{
if (images.Count == 0)
{
throw new ArgumentException("Can't create trickplay from 0 images.");
}
var workDir = Path.Combine(_appPaths.TempDirectory, Guid.NewGuid().ToString("N"));
Directory.CreateDirectory(workDir);
var trickplayInfo = new TrickplayInfo
{
Width = width,
Interval = options.Interval,
TileWidth = options.TileWidth,
TileHeight = options.TileHeight,
ThumbnailCount = images.Count,
// Set during image generation
Height = 0,
Bandwidth = 0
};
/*
* Generate trickplay tiles from sets of thumbnails
*/
var imageOptions = new ImageCollageOptions
{
Width = trickplayInfo.TileWidth,
Height = trickplayInfo.TileHeight
};
var thumbnailsPerTile = trickplayInfo.TileWidth * trickplayInfo.TileHeight;
var requiredTiles = (int)Math.Ceiling((double)images.Count / thumbnailsPerTile);
for (int i = 0; i < requiredTiles; i++)
{
// Set output/input paths
var tilePath = Path.Combine(workDir, $"{i}.jpg");
imageOptions.OutputPath = tilePath;
imageOptions.InputPaths = images.GetRange(i * thumbnailsPerTile, Math.Min(thumbnailsPerTile, images.Count - (i * thumbnailsPerTile)));
// Generate image and use returned height for tiles info
var height = _imageEncoder.CreateTrickplayTile(imageOptions, options.JpegQuality, trickplayInfo.Width, trickplayInfo.Height != 0 ? trickplayInfo.Height : null);
if (trickplayInfo.Height == 0)
{
trickplayInfo.Height = height;
}
// Update bitrate
var bitrate = (int)Math.Ceiling((decimal)new FileInfo(tilePath).Length * 8 / trickplayInfo.TileWidth / trickplayInfo.TileHeight / (trickplayInfo.Interval / 1000));
trickplayInfo.Bandwidth = Math.Max(trickplayInfo.Bandwidth, bitrate);
}
/*
* Move trickplay tiles to output directory
*/
Directory.CreateDirectory(Directory.GetParent(outputDir)!.FullName);
// Replace existing tiles if they already exist
if (Directory.Exists(outputDir))
{
Directory.Delete(outputDir, true);
}
MoveDirectory(workDir, outputDir);
return trickplayInfo;
}
private bool CanGenerateTrickplay(Video video, int interval)
{
var videoType = video.VideoType;
if (videoType == VideoType.Iso || videoType == VideoType.Dvd || videoType == VideoType.BluRay)
{
return false;
}
if (video.IsPlaceHolder)
{
return false;
}
if (video.IsShortcut)
{
return false;
}
if (!video.IsCompleteMedia)
{
return false;
}
if (!video.RunTimeTicks.HasValue || video.RunTimeTicks.Value < TimeSpan.FromMilliseconds(interval).Ticks)
{
return false;
}
var libraryOptions = _libraryManager.GetLibraryOptions(video);
if (libraryOptions is null || !libraryOptions.EnableTrickplayImageExtraction)
{
return false;
}
// Can't extract images if there are no video streams
return video.GetMediaStreams().Count > 0;
}
/// <inheritdoc />
public async Task<Dictionary<int, TrickplayInfo>> GetTrickplayResolutions(Guid itemId)
{
var trickplayResolutions = new Dictionary<int, TrickplayInfo>();
var dbContext = await _dbProvider.CreateDbContextAsync().ConfigureAwait(false);
await using (dbContext.ConfigureAwait(false))
{
var trickplayInfos = await dbContext.TrickplayInfos
.AsNoTracking()
.Where(i => i.ItemId.Equals(itemId))
.ToListAsync()
.ConfigureAwait(false);
foreach (var info in trickplayInfos)
{
trickplayResolutions[info.Width] = info;
}
}
return trickplayResolutions;
}
/// <inheritdoc />
public async Task SaveTrickplayInfo(TrickplayInfo info)
{
var dbContext = await _dbProvider.CreateDbContextAsync().ConfigureAwait(false);
await using (dbContext.ConfigureAwait(false))
{
var oldInfo = await dbContext.TrickplayInfos.FindAsync(info.ItemId, info.Width).ConfigureAwait(false);
if (oldInfo is not null)
{
dbContext.TrickplayInfos.Remove(oldInfo);
}
dbContext.Add(info);
await dbContext.SaveChangesAsync().ConfigureAwait(false);
}
}
/// <inheritdoc />
public async Task<Dictionary<string, Dictionary<int, TrickplayInfo>>> GetTrickplayManifest(BaseItem item)
{
var trickplayManifest = new Dictionary<string, Dictionary<int, TrickplayInfo>>();
foreach (var mediaSource in item.GetMediaSources(false))
{
var mediaSourceId = Guid.Parse(mediaSource.Id);
var trickplayResolutions = await GetTrickplayResolutions(mediaSourceId).ConfigureAwait(false);
if (trickplayResolutions.Count > 0)
{
trickplayManifest[mediaSource.Id] = trickplayResolutions;
}
}
return trickplayManifest;
}
/// <inheritdoc />
public string GetTrickplayTilePath(BaseItem item, int width, int index)
{
return Path.Combine(GetTrickplayDirectory(item, width), index + ".jpg");
}
/// <inheritdoc />
public async Task<string?> GetHlsPlaylist(Guid itemId, int width, string? apiKey)
{
var trickplayResolutions = await GetTrickplayResolutions(itemId).ConfigureAwait(false);
if (trickplayResolutions is not null && trickplayResolutions.TryGetValue(width, out var trickplayInfo))
{
var builder = new StringBuilder(128);
if (trickplayInfo.ThumbnailCount > 0)
{
const string urlFormat = "{0}.jpg?MediaSourceId={1}&api_key={2}";
const string decimalFormat = "{0:0.###}";
var resolution = $"{trickplayInfo.Width}x{trickplayInfo.Height}";
var layout = $"{trickplayInfo.TileWidth}x{trickplayInfo.TileHeight}";
var thumbnailsPerTile = trickplayInfo.TileWidth * trickplayInfo.TileHeight;
var thumbnailDuration = trickplayInfo.Interval / 1000d;
var infDuration = thumbnailDuration * thumbnailsPerTile;
var tileCount = (int)Math.Ceiling((decimal)trickplayInfo.ThumbnailCount / thumbnailsPerTile);
builder
.AppendLine("#EXTM3U")
.Append("#EXT-X-TARGETDURATION:")
.AppendLine(tileCount.ToString(CultureInfo.InvariantCulture))
.AppendLine("#EXT-X-VERSION:7")
.AppendLine("#EXT-X-MEDIA-SEQUENCE:1")
.AppendLine("#EXT-X-PLAYLIST-TYPE:VOD")
.AppendLine("#EXT-X-IMAGES-ONLY");
for (int i = 0; i < tileCount; i++)
{
// All tiles prior to the last must contain full amount of thumbnails (no black).
if (i == tileCount - 1)
{
thumbnailsPerTile = trickplayInfo.ThumbnailCount - (i * thumbnailsPerTile);
infDuration = thumbnailDuration * thumbnailsPerTile;
}
// EXTINF
builder
.Append("#EXTINF:")
.AppendFormat(CultureInfo.InvariantCulture, decimalFormat, infDuration)
.AppendLine(",");
// EXT-X-TILES
builder
.Append("#EXT-X-TILES:RESOLUTION=")
.Append(resolution)
.Append(",LAYOUT=")
.Append(layout)
.Append(",DURATION=")
.AppendFormat(CultureInfo.InvariantCulture, decimalFormat, thumbnailDuration)
.AppendLine();
// URL
builder
.AppendFormat(
CultureInfo.InvariantCulture,
urlFormat,
i.ToString(CultureInfo.InvariantCulture),
itemId.ToString("N"),
apiKey)
.AppendLine();
}
builder.AppendLine("#EXT-X-ENDLIST");
return builder.ToString();
}
}
return null;
}
private string GetTrickplayDirectory(BaseItem item, int? width = null)
{
var path = Path.Combine(item.GetInternalMetadataPath(), "trickplay");
return width.HasValue ? Path.Combine(path, width.Value.ToString(CultureInfo.InvariantCulture)) : path;
}
private void MoveDirectory(string source, string destination)
{
try
{
Directory.Move(source, destination);
}
catch (IOException)
{
// Cross device move requires a copy
Directory.CreateDirectory(destination);
foreach (string file in Directory.GetFiles(source))
{
File.Copy(file, Path.Join(destination, Path.GetFileName(file)), true);
}
Directory.Delete(source, true);
}
}
}