486 lines
18 KiB
C#
486 lines
18 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.IO;
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using System.Linq;
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using System.Threading.Tasks;
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using MediaBrowser.Common.Extensions;
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using MediaBrowser.Controller;
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using MediaBrowser.Controller.Drawing;
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using MediaBrowser.Controller.Entities;
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using MediaBrowser.Controller.MediaEncoding;
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using MediaBrowser.Model.Drawing;
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using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.IO;
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using MediaBrowser.Model.Net;
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using Microsoft.Extensions.Logging;
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namespace Emby.Drawing
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{
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/// <summary>
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/// Class ImageProcessor.
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/// </summary>
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public sealed class ImageProcessor : IImageProcessor, IDisposable
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{
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// Increment this when there's a change requiring caches to be invalidated
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private const string Version = "3";
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private static readonly HashSet<string> _transparentImageTypes
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= new HashSet<string>(StringComparer.OrdinalIgnoreCase) { ".png", ".webp", ".gif" };
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private readonly ILogger<ImageProcessor> _logger;
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private readonly IFileSystem _fileSystem;
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private readonly IServerApplicationPaths _appPaths;
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private readonly IImageEncoder _imageEncoder;
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private readonly IMediaEncoder _mediaEncoder;
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private bool _disposed = false;
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/// <summary>
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/// Initializes a new instance of the <see cref="ImageProcessor"/> class.
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/// </summary>
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/// <param name="logger">The logger.</param>
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/// <param name="appPaths">The server application paths.</param>
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/// <param name="fileSystem">The filesystem.</param>
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/// <param name="imageEncoder">The image encoder.</param>
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/// <param name="mediaEncoder">The media encoder.</param>
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public ImageProcessor(
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ILogger<ImageProcessor> logger,
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IServerApplicationPaths appPaths,
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IFileSystem fileSystem,
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IImageEncoder imageEncoder,
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IMediaEncoder mediaEncoder)
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{
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_logger = logger;
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_fileSystem = fileSystem;
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_imageEncoder = imageEncoder;
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_mediaEncoder = mediaEncoder;
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_appPaths = appPaths;
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}
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private string ResizedImageCachePath => Path.Combine(_appPaths.ImageCachePath, "resized-images");
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/// <inheritdoc />
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public IReadOnlyCollection<string> SupportedInputFormats =>
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new HashSet<string>(StringComparer.OrdinalIgnoreCase)
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{
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"tiff",
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"tif",
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"jpeg",
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"jpg",
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"png",
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"aiff",
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"cr2",
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"crw",
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"nef",
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"orf",
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"pef",
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"arw",
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"webp",
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"gif",
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"bmp",
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"erf",
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"raf",
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"rw2",
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"nrw",
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"dng",
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"ico",
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"astc",
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"ktx",
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"pkm",
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"wbmp"
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};
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/// <inheritdoc />
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public bool SupportsImageCollageCreation => _imageEncoder.SupportsImageCollageCreation;
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/// <inheritdoc />
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public async Task ProcessImage(ImageProcessingOptions options, Stream toStream)
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{
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var file = await ProcessImage(options).ConfigureAwait(false);
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using (var fileStream = new FileStream(file.Item1, FileMode.Open, FileAccess.Read, FileShare.Read, IODefaults.FileStreamBufferSize, true))
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{
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await fileStream.CopyToAsync(toStream).ConfigureAwait(false);
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}
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}
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/// <inheritdoc />
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public IReadOnlyCollection<ImageFormat> GetSupportedImageOutputFormats()
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=> _imageEncoder.SupportedOutputFormats;
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/// <inheritdoc />
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public bool SupportsTransparency(string path)
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=> _transparentImageTypes.Contains(Path.GetExtension(path));
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/// <inheritdoc />
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public async Task<(string path, string? mimeType, DateTime dateModified)> ProcessImage(ImageProcessingOptions options)
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{
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ItemImageInfo originalImage = options.Image;
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BaseItem item = options.Item;
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string originalImagePath = originalImage.Path;
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DateTime dateModified = originalImage.DateModified;
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ImageDimensions? originalImageSize = null;
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if (originalImage.Width > 0 && originalImage.Height > 0)
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{
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originalImageSize = new ImageDimensions(originalImage.Width, originalImage.Height);
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}
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if (!_imageEncoder.SupportsImageEncoding)
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{
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return (originalImagePath, MimeTypes.GetMimeType(originalImagePath), dateModified);
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}
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var supportedImageInfo = await GetSupportedImage(originalImagePath, dateModified).ConfigureAwait(false);
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originalImagePath = supportedImageInfo.path;
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if (!File.Exists(originalImagePath))
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{
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return (originalImagePath, MimeTypes.GetMimeType(originalImagePath), dateModified);
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}
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dateModified = supportedImageInfo.dateModified;
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bool requiresTransparency = _transparentImageTypes.Contains(Path.GetExtension(originalImagePath));
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bool autoOrient = false;
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ImageOrientation? orientation = null;
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if (item is Photo photo)
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{
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if (photo.Orientation.HasValue)
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{
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if (photo.Orientation.Value != ImageOrientation.TopLeft)
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{
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autoOrient = true;
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orientation = photo.Orientation;
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}
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}
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else
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{
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// Orientation unknown, so do it
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autoOrient = true;
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orientation = photo.Orientation;
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}
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}
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if (options.HasDefaultOptions(originalImagePath, originalImageSize) && (!autoOrient || !options.RequiresAutoOrientation))
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{
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// Just spit out the original file if all the options are default
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return (originalImagePath, MimeTypes.GetMimeType(originalImagePath), dateModified);
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}
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ImageDimensions newSize = ImageHelper.GetNewImageSize(options, null);
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int quality = options.Quality;
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ImageFormat outputFormat = GetOutputFormat(options.SupportedOutputFormats, requiresTransparency);
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string cacheFilePath = GetCacheFilePath(originalImagePath, newSize, quality, dateModified, outputFormat, options.AddPlayedIndicator, options.PercentPlayed, options.UnplayedCount, options.Blur, options.BackgroundColor, options.ForegroundLayer);
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try
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{
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if (!File.Exists(cacheFilePath))
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{
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if (options.CropWhiteSpace && !SupportsTransparency(originalImagePath))
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{
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options.CropWhiteSpace = false;
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}
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string resultPath = _imageEncoder.EncodeImage(originalImagePath, dateModified, cacheFilePath, autoOrient, orientation, quality, options, outputFormat);
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if (string.Equals(resultPath, originalImagePath, StringComparison.OrdinalIgnoreCase))
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{
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return (originalImagePath, MimeTypes.GetMimeType(originalImagePath), dateModified);
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}
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}
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return (cacheFilePath, GetMimeType(outputFormat, cacheFilePath), _fileSystem.GetLastWriteTimeUtc(cacheFilePath));
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}
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catch (Exception ex)
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{
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// If it fails for whatever reason, return the original image
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_logger.LogError(ex, "Error encoding image");
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return (originalImagePath, MimeTypes.GetMimeType(originalImagePath), dateModified);
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}
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}
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private ImageFormat GetOutputFormat(IReadOnlyCollection<ImageFormat> clientSupportedFormats, bool requiresTransparency)
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{
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var serverFormats = GetSupportedImageOutputFormats();
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// Client doesn't care about format, so start with webp if supported
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if (serverFormats.Contains(ImageFormat.Webp) && clientSupportedFormats.Contains(ImageFormat.Webp))
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{
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return ImageFormat.Webp;
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}
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// If transparency is needed and webp isn't supported, than png is the only option
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if (requiresTransparency && clientSupportedFormats.Contains(ImageFormat.Png))
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{
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return ImageFormat.Png;
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}
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foreach (var format in clientSupportedFormats)
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{
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if (serverFormats.Contains(format))
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{
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return format;
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}
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}
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// We should never actually get here
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return ImageFormat.Jpg;
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}
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private string? GetMimeType(ImageFormat format, string path)
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=> format switch
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{
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ImageFormat.Bmp => MimeTypes.GetMimeType("i.bmp"),
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ImageFormat.Gif => MimeTypes.GetMimeType("i.gif"),
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ImageFormat.Jpg => MimeTypes.GetMimeType("i.jpg"),
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ImageFormat.Png => MimeTypes.GetMimeType("i.png"),
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ImageFormat.Webp => MimeTypes.GetMimeType("i.webp"),
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_ => MimeTypes.GetMimeType(path)
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};
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/// <summary>
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/// Gets the cache file path based on a set of parameters.
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/// </summary>
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private string GetCacheFilePath(string originalPath, ImageDimensions outputSize, int quality, DateTime dateModified, ImageFormat format, bool addPlayedIndicator, double percentPlayed, int? unwatchedCount, int? blur, string backgroundColor, string foregroundLayer)
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{
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var filename = originalPath
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+ "width=" + outputSize.Width
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+ "height=" + outputSize.Height
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+ "quality=" + quality
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+ "datemodified=" + dateModified.Ticks
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+ "f=" + format;
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if (addPlayedIndicator)
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{
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filename += "pl=true";
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}
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if (percentPlayed > 0)
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{
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filename += "p=" + percentPlayed;
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}
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if (unwatchedCount.HasValue)
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{
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filename += "p=" + unwatchedCount.Value;
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}
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if (blur.HasValue)
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{
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filename += "blur=" + blur.Value;
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}
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if (!string.IsNullOrEmpty(backgroundColor))
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{
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filename += "b=" + backgroundColor;
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}
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if (!string.IsNullOrEmpty(foregroundLayer))
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{
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filename += "fl=" + foregroundLayer;
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}
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filename += "v=" + Version;
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return GetCachePath(ResizedImageCachePath, filename, "." + format.ToString().ToLowerInvariant());
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}
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/// <inheritdoc />
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public ImageDimensions GetImageDimensions(BaseItem item, ItemImageInfo info)
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{
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int width = info.Width;
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int height = info.Height;
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if (height > 0 && width > 0)
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{
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return new ImageDimensions(width, height);
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}
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string path = info.Path;
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_logger.LogDebug("Getting image size for item {ItemType} {Path}", item.GetType().Name, path);
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ImageDimensions size = GetImageDimensions(path);
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info.Width = size.Width;
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info.Height = size.Height;
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return size;
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}
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/// <inheritdoc />
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public ImageDimensions GetImageDimensions(string path)
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=> _imageEncoder.GetImageSize(path);
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/// <inheritdoc />
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public string GetImageBlurHash(string path)
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{
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var size = GetImageDimensions(path);
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if (size.Width <= 0 || size.Height <= 0)
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{
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return string.Empty;
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}
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// We want tiles to be as close to square as possible, and to *mostly* keep under 16 tiles for performance.
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// One tile is (width / xComp) x (height / yComp) pixels, which means that ideally yComp = xComp * height / width.
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// See more at https://github.com/woltapp/blurhash/#how-do-i-pick-the-number-of-x-and-y-components
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float xCompF = MathF.Sqrt(16.0f * size.Width / size.Height);
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float yCompF = xCompF * size.Height / size.Width;
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int xComp = Math.Min((int)xCompF + 1, 9);
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int yComp = Math.Min((int)yCompF + 1, 9);
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return _imageEncoder.GetImageBlurHash(xComp, yComp, path);
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}
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/// <inheritdoc />
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public string GetImageCacheTag(BaseItem item, ItemImageInfo image)
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=> (item.Path + image.DateModified.Ticks).GetMD5().ToString("N", CultureInfo.InvariantCulture);
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/// <inheritdoc />
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public string GetImageCacheTag(BaseItem item, ChapterInfo chapter)
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{
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return GetImageCacheTag(item, new ItemImageInfo
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{
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Path = chapter.ImagePath,
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Type = ImageType.Chapter,
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DateModified = chapter.ImageDateModified
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});
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}
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private async Task<(string path, DateTime dateModified)> GetSupportedImage(string originalImagePath, DateTime dateModified)
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{
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var inputFormat = Path.GetExtension(originalImagePath)
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.TrimStart('.')
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.Replace("jpeg", "jpg", StringComparison.OrdinalIgnoreCase);
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// These are just jpg files renamed as tbn
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if (string.Equals(inputFormat, "tbn", StringComparison.OrdinalIgnoreCase))
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{
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return (originalImagePath, dateModified);
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}
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if (!_imageEncoder.SupportedInputFormats.Contains(inputFormat))
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{
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try
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{
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string filename = (originalImagePath + dateModified.Ticks.ToString(CultureInfo.InvariantCulture)).GetMD5().ToString("N", CultureInfo.InvariantCulture);
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string cacheExtension = _mediaEncoder.SupportsEncoder("libwebp") ? ".webp" : ".png";
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var outputPath = Path.Combine(_appPaths.ImageCachePath, "converted-images", filename + cacheExtension);
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var file = _fileSystem.GetFileInfo(outputPath);
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if (!file.Exists)
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{
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await _mediaEncoder.ConvertImage(originalImagePath, outputPath).ConfigureAwait(false);
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dateModified = _fileSystem.GetLastWriteTimeUtc(outputPath);
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}
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else
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{
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dateModified = file.LastWriteTimeUtc;
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}
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originalImagePath = outputPath;
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Image conversion failed for {Path}", originalImagePath);
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}
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}
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return (originalImagePath, dateModified);
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}
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/// <summary>
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/// Gets the cache path.
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/// </summary>
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/// <param name="path">The path.</param>
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/// <param name="uniqueName">Name of the unique.</param>
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/// <param name="fileExtension">The file extension.</param>
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/// <returns>System.String.</returns>
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/// <exception cref="ArgumentNullException">
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/// path
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/// or
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/// uniqueName
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/// or
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/// fileExtension.
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/// </exception>
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public string GetCachePath(string path, string uniqueName, string fileExtension)
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{
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if (string.IsNullOrEmpty(path))
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{
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throw new ArgumentNullException(nameof(path));
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}
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if (string.IsNullOrEmpty(uniqueName))
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{
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throw new ArgumentNullException(nameof(uniqueName));
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}
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if (string.IsNullOrEmpty(fileExtension))
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{
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throw new ArgumentNullException(nameof(fileExtension));
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}
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var filename = uniqueName.GetMD5() + fileExtension;
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return GetCachePath(path, filename);
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}
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/// <summary>
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/// Gets the cache path.
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/// </summary>
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/// <param name="path">The path.</param>
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/// <param name="filename">The filename.</param>
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/// <returns>System.String.</returns>
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/// <exception cref="ArgumentNullException">
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/// path
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/// or
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/// filename.
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/// </exception>
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public string GetCachePath(string path, string filename)
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{
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if (string.IsNullOrEmpty(path))
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{
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throw new ArgumentNullException(nameof(path));
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}
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if (string.IsNullOrEmpty(filename))
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{
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throw new ArgumentNullException(nameof(filename));
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}
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var prefix = filename.Substring(0, 1);
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return Path.Combine(path, prefix, filename);
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}
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/// <inheritdoc />
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public void CreateImageCollage(ImageCollageOptions options)
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{
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_logger.LogInformation("Creating image collage and saving to {Path}", options.OutputPath);
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_imageEncoder.CreateImageCollage(options);
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_logger.LogInformation("Completed creation of image collage and saved to {Path}", options.OutputPath);
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}
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/// <inheritdoc />
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public void Dispose()
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{
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if (_disposed)
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{
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return;
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}
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if (_imageEncoder is IDisposable disposable)
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{
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disposable.Dispose();
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}
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_disposed = true;
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}
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}
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}
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