803 lines
28 KiB
C#
803 lines
28 KiB
C#
using ImageMagickSharp;
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using MediaBrowser.Common.Extensions;
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using MediaBrowser.Common.IO;
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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.Providers;
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using MediaBrowser.Model.Drawing;
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using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.Logging;
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using MediaBrowser.Model.Serialization;
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using System;
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using System.Collections.Concurrent;
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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;
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using System.Threading.Tasks;
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namespace MediaBrowser.Server.Implementations.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 class ImageProcessor : IImageProcessor, IDisposable
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{
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/// <summary>
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/// The us culture
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/// </summary>
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protected readonly CultureInfo UsCulture = new CultureInfo("en-US");
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/// <summary>
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/// The _cached imaged sizes
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/// </summary>
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private readonly ConcurrentDictionary<Guid, ImageSize> _cachedImagedSizes;
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/// <summary>
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/// Gets the list of currently registered image processors
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/// Image processors are specialized metadata providers that run after the normal ones
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/// </summary>
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/// <value>The image enhancers.</value>
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public IEnumerable<IImageEnhancer> ImageEnhancers { get; private set; }
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/// <summary>
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/// The _logger
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/// </summary>
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private readonly ILogger _logger;
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private readonly IFileSystem _fileSystem;
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private readonly IJsonSerializer _jsonSerializer;
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private readonly IServerApplicationPaths _appPaths;
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public ImageProcessor(ILogger logger, IServerApplicationPaths appPaths, IFileSystem fileSystem, IJsonSerializer jsonSerializer)
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{
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_logger = logger;
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_fileSystem = fileSystem;
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_jsonSerializer = jsonSerializer;
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_appPaths = appPaths;
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_saveImageSizeTimer = new Timer(SaveImageSizeCallback, null, Timeout.Infinite, Timeout.Infinite);
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Dictionary<Guid, ImageSize> sizeDictionary;
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try
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{
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sizeDictionary = jsonSerializer.DeserializeFromFile<Dictionary<Guid, ImageSize>>(ImageSizeFile) ??
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new Dictionary<Guid, ImageSize>();
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}
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catch (FileNotFoundException)
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{
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// No biggie
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sizeDictionary = new Dictionary<Guid, ImageSize>();
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}
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catch (DirectoryNotFoundException)
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{
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// No biggie
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sizeDictionary = new Dictionary<Guid, ImageSize>();
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}
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catch (Exception ex)
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{
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logger.ErrorException("Error parsing image size cache file", ex);
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sizeDictionary = new Dictionary<Guid, ImageSize>();
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}
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_cachedImagedSizes = new ConcurrentDictionary<Guid, ImageSize>(sizeDictionary);
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LogImageMagickVersionVersion();
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}
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private string ResizedImageCachePath
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{
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get
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{
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return Path.Combine(_appPaths.ImageCachePath, "resized-images");
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}
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}
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private string EnhancedImageCachePath
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{
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get
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{
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return Path.Combine(_appPaths.ImageCachePath, "enhanced-images");
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}
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}
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private string CroppedWhitespaceImageCachePath
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{
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get
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{
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return Path.Combine(_appPaths.ImageCachePath, "cropped-images");
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}
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}
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public void AddParts(IEnumerable<IImageEnhancer> enhancers)
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{
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ImageEnhancers = enhancers.ToArray();
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}
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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 = _fileSystem.GetFileStream(file, FileMode.Open, FileAccess.Read, FileShare.Read, 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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public ImageFormat[] GetSupportedImageOutputFormats()
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{
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return new[] { ImageFormat.Webp, ImageFormat.Gif, ImageFormat.Jpg, ImageFormat.Png };
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}
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public async Task<string> ProcessImage(ImageProcessingOptions options)
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{
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if (options == null)
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{
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throw new ArgumentNullException("options");
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}
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var originalImagePath = options.Image.Path;
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if (options.HasDefaultOptions(originalImagePath) && options.Enhancers.Count == 0 && !options.CropWhiteSpace)
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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;
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}
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var dateModified = options.Image.DateModified;
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if (options.CropWhiteSpace)
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{
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var tuple = await GetWhitespaceCroppedImage(originalImagePath, dateModified).ConfigureAwait(false);
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originalImagePath = tuple.Item1;
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dateModified = tuple.Item2;
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}
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if (options.Enhancers.Count > 0)
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{
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var tuple = await GetEnhancedImage(options.Image, options.Item, options.ImageIndex, options.Enhancers).ConfigureAwait(false);
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originalImagePath = tuple.Item1;
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dateModified = tuple.Item2;
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}
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var originalImageSize = GetImageSize(originalImagePath, dateModified);
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// Determine the output size based on incoming parameters
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var newSize = DrawingUtils.Resize(originalImageSize, options.Width, options.Height, options.MaxWidth, options.MaxHeight);
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if (options.HasDefaultOptionsWithoutSize(originalImagePath) && newSize.Equals(originalImageSize) && options.Enhancers.Count == 0)
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{
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// Just spit out the original file if the new size equals the old
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return originalImagePath;
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}
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var quality = options.Quality ?? 90;
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var cacheFilePath = GetCacheFilePath(originalImagePath, newSize, quality, dateModified, options.OutputFormat, options.AddPlayedIndicator, options.PercentPlayed, options.UnplayedCount, options.BackgroundColor);
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var semaphore = GetLock(cacheFilePath);
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await semaphore.WaitAsync().ConfigureAwait(false);
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// Check again in case of lock contention
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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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semaphore.Release();
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return cacheFilePath;
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}
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}
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catch
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{
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semaphore.Release();
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throw;
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}
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try
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{
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var newWidth = Convert.ToInt32(newSize.Width);
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var newHeight = Convert.ToInt32(newSize.Height);
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Directory.CreateDirectory(Path.GetDirectoryName(cacheFilePath));
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if (string.IsNullOrWhiteSpace(options.BackgroundColor))
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{
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using (var originalImage = new MagickWand(originalImagePath))
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{
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originalImage.CurrentImage.ResizeImage(newWidth, newHeight);
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DrawIndicator(originalImage, newWidth, newHeight, options);
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originalImage.CurrentImage.CompressionQuality = quality;
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originalImage.SaveImage(cacheFilePath);
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return cacheFilePath;
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}
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}
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else
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{
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using (var wand = new MagickWand(newWidth, newHeight, options.BackgroundColor))
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{
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using (var originalImage = new MagickWand(originalImagePath))
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{
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originalImage.CurrentImage.ResizeImage(newWidth, newHeight);
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wand.CurrentImage.CompositeImage(originalImage, CompositeOperator.OverCompositeOp, 0, 0);
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DrawIndicator(wand, newWidth, newHeight, options);
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wand.CurrentImage.CompressionQuality = quality;
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wand.SaveImage(cacheFilePath);
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return cacheFilePath;
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}
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}
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}
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}
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finally
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{
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semaphore.Release();
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}
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}
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private void LogImageMagickVersionVersion()
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{
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try
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{
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_logger.Info("ImageMagick version: " + Wand.VersionString);
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}
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catch (Exception ex)
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{
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_logger.ErrorException("Error loading ImageMagick: ", ex);
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}
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}
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/// <summary>
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/// Draws the indicator.
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/// </summary>
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/// <param name="wand">The wand.</param>
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/// <param name="imageWidth">Width of the image.</param>
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/// <param name="imageHeight">Height of the image.</param>
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/// <param name="options">The options.</param>
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private void DrawIndicator(MagickWand wand, int imageWidth, int imageHeight, ImageProcessingOptions options)
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{
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if (!options.AddPlayedIndicator && !options.UnplayedCount.HasValue && options.PercentPlayed.Equals(0))
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{
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return;
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}
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try
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{
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if (options.AddPlayedIndicator)
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{
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var currentImageSize = new ImageSize(imageWidth, imageHeight);
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new PlayedIndicatorDrawer().DrawPlayedIndicator(wand, currentImageSize);
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}
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else if (options.UnplayedCount.HasValue)
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{
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var currentImageSize = new ImageSize(imageWidth, imageHeight);
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new UnplayedCountIndicator().DrawUnplayedCountIndicator(wand, currentImageSize, options.UnplayedCount.Value);
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}
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if (options.PercentPlayed > 0)
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{
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new PercentPlayedDrawer().Process(wand, options.PercentPlayed);
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}
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}
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catch (Exception ex)
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{
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_logger.ErrorException("Error drawing indicator overlay", ex);
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}
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}
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/// <summary>
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/// Crops whitespace from an image, caches the result, and returns the cached path
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/// </summary>
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/// <param name="originalImagePath">The original image path.</param>
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/// <param name="dateModified">The date modified.</param>
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/// <returns>System.String.</returns>
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private async Task<Tuple<string, DateTime>> GetWhitespaceCroppedImage(string originalImagePath, DateTime dateModified)
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{
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var name = originalImagePath;
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name += "datemodified=" + dateModified.Ticks;
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var croppedImagePath = GetCachePath(CroppedWhitespaceImageCachePath, name, Path.GetExtension(originalImagePath));
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var semaphore = GetLock(croppedImagePath);
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await semaphore.WaitAsync().ConfigureAwait(false);
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// Check again in case of contention
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if (File.Exists(croppedImagePath))
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{
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semaphore.Release();
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return new Tuple<string, DateTime>(croppedImagePath, _fileSystem.GetLastWriteTimeUtc(croppedImagePath));
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}
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try
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{
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Directory.CreateDirectory(Path.GetDirectoryName(croppedImagePath));
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using (var wand = new MagickWand(originalImagePath))
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{
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wand.CurrentImage.TrimImage(10);
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wand.SaveImage(croppedImagePath);
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}
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}
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catch (Exception ex)
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{
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// We have to have a catch-all here because some of the .net image methods throw a plain old Exception
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_logger.ErrorException("Error cropping image {0}", ex, originalImagePath);
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return new Tuple<string, DateTime>(originalImagePath, dateModified);
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}
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finally
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{
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semaphore.Release();
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}
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return new Tuple<string, DateTime>(croppedImagePath, _fileSystem.GetLastWriteTimeUtc(croppedImagePath));
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}
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/// <summary>
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/// Increment this when there's a change requiring caches to be invalidated
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/// </summary>
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private const string Version = "3";
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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, ImageSize outputSize, int quality, DateTime dateModified, ImageFormat format, bool addPlayedIndicator, double percentPlayed, int? unwatchedCount, string backgroundColor)
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{
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var filename = originalPath;
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filename += "width=" + outputSize.Width;
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filename += "height=" + outputSize.Height;
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filename += "quality=" + quality;
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filename += "datemodified=" + dateModified.Ticks;
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filename += "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 (!string.IsNullOrEmpty(backgroundColor))
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{
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filename += "b=" + backgroundColor;
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}
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filename += "v=" + Version;
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return GetCachePath(ResizedImageCachePath, filename, "." + format.ToString().ToLower());
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}
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/// <summary>
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/// Gets the size of the image.
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/// </summary>
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/// <param name="path">The path.</param>
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/// <returns>ImageSize.</returns>
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public ImageSize GetImageSize(string path)
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{
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return GetImageSize(path, File.GetLastWriteTimeUtc(path));
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}
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public ImageSize GetImageSize(ItemImageInfo info)
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{
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return GetImageSize(info.Path, info.DateModified);
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}
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/// <summary>
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/// Gets the size of the image.
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/// </summary>
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/// <param name="path">The path.</param>
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/// <param name="imageDateModified">The image date modified.</param>
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/// <returns>ImageSize.</returns>
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/// <exception cref="System.ArgumentNullException">path</exception>
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private ImageSize GetImageSize(string path, DateTime imageDateModified)
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{
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if (string.IsNullOrEmpty(path))
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{
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throw new ArgumentNullException("path");
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}
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var name = path + "datemodified=" + imageDateModified.Ticks;
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ImageSize size;
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var cacheHash = name.GetMD5();
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if (!_cachedImagedSizes.TryGetValue(cacheHash, out size))
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{
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size = GetImageSizeInternal(path);
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_cachedImagedSizes.AddOrUpdate(cacheHash, size, (keyName, oldValue) => size);
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}
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return size;
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}
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/// <summary>
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/// Gets the image size internal.
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/// </summary>
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/// <param name="path">The path.</param>
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/// <returns>ImageSize.</returns>
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private ImageSize GetImageSizeInternal(string path)
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{
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var size = ImageHeader.GetDimensions(path, _logger, _fileSystem);
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StartSaveImageSizeTimer();
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return new ImageSize { Width = size.Width, Height = size.Height };
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}
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private readonly Timer _saveImageSizeTimer;
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private const int SaveImageSizeTimeout = 5000;
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private readonly object _saveImageSizeLock = new object();
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private void StartSaveImageSizeTimer()
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{
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_saveImageSizeTimer.Change(SaveImageSizeTimeout, Timeout.Infinite);
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}
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private void SaveImageSizeCallback(object state)
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{
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lock (_saveImageSizeLock)
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{
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try
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{
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var path = ImageSizeFile;
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Directory.CreateDirectory(Path.GetDirectoryName(path));
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_jsonSerializer.SerializeToFile(_cachedImagedSizes, path);
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}
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catch (Exception ex)
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{
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_logger.ErrorException("Error saving image size file", ex);
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}
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}
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}
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private string ImageSizeFile
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{
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get
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{
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return Path.Combine(_appPaths.DataPath, "imagesizes.json");
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}
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}
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/// <summary>
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/// Gets the image cache tag.
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/// </summary>
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/// <param name="item">The item.</param>
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/// <param name="image">The image.</param>
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/// <returns>Guid.</returns>
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/// <exception cref="System.ArgumentNullException">item</exception>
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public string GetImageCacheTag(IHasImages item, ItemImageInfo image)
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{
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if (item == null)
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{
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throw new ArgumentNullException("item");
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}
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if (image == null)
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{
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throw new ArgumentNullException("image");
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}
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var supportedEnhancers = GetSupportedEnhancers(item, image.Type);
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return GetImageCacheTag(item, image, supportedEnhancers.ToList());
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}
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/// <summary>
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/// Gets the image cache tag.
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/// </summary>
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/// <param name="item">The item.</param>
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/// <param name="image">The image.</param>
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/// <param name="imageEnhancers">The image enhancers.</param>
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/// <returns>Guid.</returns>
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/// <exception cref="System.ArgumentNullException">item</exception>
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public string GetImageCacheTag(IHasImages item, ItemImageInfo image, List<IImageEnhancer> imageEnhancers)
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{
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if (item == null)
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{
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throw new ArgumentNullException("item");
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}
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if (imageEnhancers == null)
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{
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throw new ArgumentNullException("imageEnhancers");
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}
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if (image == null)
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{
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throw new ArgumentNullException("image");
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}
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var originalImagePath = image.Path;
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var dateModified = image.DateModified;
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var imageType = image.Type;
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// Optimization
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if (imageEnhancers.Count == 0)
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{
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return (originalImagePath + dateModified.Ticks).GetMD5().ToString("N");
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}
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// Cache name is created with supported enhancers combined with the last config change so we pick up new config changes
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var cacheKeys = imageEnhancers.Select(i => i.GetConfigurationCacheKey(item, imageType)).ToList();
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cacheKeys.Add(originalImagePath + dateModified.Ticks);
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return string.Join("|", cacheKeys.ToArray()).GetMD5().ToString("N");
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}
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/// <summary>
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/// Gets the enhanced image.
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/// </summary>
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/// <param name="item">The item.</param>
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/// <param name="imageType">Type of the image.</param>
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/// <param name="imageIndex">Index of the image.</param>
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/// <returns>Task{System.String}.</returns>
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public async Task<string> GetEnhancedImage(IHasImages item, ImageType imageType, int imageIndex)
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{
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var enhancers = GetSupportedEnhancers(item, imageType).ToList();
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var imageInfo = item.GetImageInfo(imageType, imageIndex);
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var result = await GetEnhancedImage(imageInfo, item, imageIndex, enhancers);
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return result.Item1;
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}
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private async Task<Tuple<string, DateTime>> GetEnhancedImage(ItemImageInfo image,
|
|
IHasImages item,
|
|
int imageIndex,
|
|
List<IImageEnhancer> enhancers)
|
|
{
|
|
var originalImagePath = image.Path;
|
|
var dateModified = image.DateModified;
|
|
var imageType = image.Type;
|
|
|
|
try
|
|
{
|
|
var cacheGuid = GetImageCacheTag(item, image, enhancers);
|
|
|
|
// Enhance if we have enhancers
|
|
var ehnancedImagePath = await GetEnhancedImageInternal(originalImagePath, item, imageType, imageIndex, enhancers, cacheGuid).ConfigureAwait(false);
|
|
|
|
// If the path changed update dateModified
|
|
if (!ehnancedImagePath.Equals(originalImagePath, StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
dateModified = _fileSystem.GetLastWriteTimeUtc(ehnancedImagePath);
|
|
|
|
return new Tuple<string, DateTime>(ehnancedImagePath, dateModified);
|
|
}
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
_logger.Error("Error enhancing image", ex);
|
|
}
|
|
|
|
return new Tuple<string, DateTime>(originalImagePath, dateModified);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the enhanced image internal.
|
|
/// </summary>
|
|
/// <param name="originalImagePath">The original image path.</param>
|
|
/// <param name="item">The item.</param>
|
|
/// <param name="imageType">Type of the image.</param>
|
|
/// <param name="imageIndex">Index of the image.</param>
|
|
/// <param name="supportedEnhancers">The supported enhancers.</param>
|
|
/// <param name="cacheGuid">The cache unique identifier.</param>
|
|
/// <returns>Task<System.String>.</returns>
|
|
/// <exception cref="ArgumentNullException">
|
|
/// originalImagePath
|
|
/// or
|
|
/// item
|
|
/// </exception>
|
|
private async Task<string> GetEnhancedImageInternal(string originalImagePath,
|
|
IHasImages item,
|
|
ImageType imageType,
|
|
int imageIndex,
|
|
IEnumerable<IImageEnhancer> supportedEnhancers,
|
|
string cacheGuid)
|
|
{
|
|
if (string.IsNullOrEmpty(originalImagePath))
|
|
{
|
|
throw new ArgumentNullException("originalImagePath");
|
|
}
|
|
|
|
if (item == null)
|
|
{
|
|
throw new ArgumentNullException("item");
|
|
}
|
|
|
|
// All enhanced images are saved as png to allow transparency
|
|
var enhancedImagePath = GetCachePath(EnhancedImageCachePath, cacheGuid + ".png");
|
|
|
|
var semaphore = GetLock(enhancedImagePath);
|
|
|
|
await semaphore.WaitAsync().ConfigureAwait(false);
|
|
|
|
// Check again in case of contention
|
|
if (File.Exists(enhancedImagePath))
|
|
{
|
|
semaphore.Release();
|
|
return enhancedImagePath;
|
|
}
|
|
|
|
try
|
|
{
|
|
Directory.CreateDirectory(Path.GetDirectoryName(enhancedImagePath));
|
|
await ExecuteImageEnhancers(supportedEnhancers, originalImagePath, enhancedImagePath, item, imageType, imageIndex).ConfigureAwait(false);
|
|
}
|
|
finally
|
|
{
|
|
semaphore.Release();
|
|
}
|
|
|
|
return enhancedImagePath;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Executes the image enhancers.
|
|
/// </summary>
|
|
/// <param name="imageEnhancers">The image enhancers.</param>
|
|
/// <param name="inputPath">The input path.</param>
|
|
/// <param name="outputPath">The output path.</param>
|
|
/// <param name="item">The item.</param>
|
|
/// <param name="imageType">Type of the image.</param>
|
|
/// <param name="imageIndex">Index of the image.</param>
|
|
/// <returns>Task{EnhancedImage}.</returns>
|
|
private async Task ExecuteImageEnhancers(IEnumerable<IImageEnhancer> imageEnhancers, string inputPath, string outputPath, IHasImages item, ImageType imageType, int imageIndex)
|
|
{
|
|
// Run the enhancers sequentially in order of priority
|
|
foreach (var enhancer in imageEnhancers)
|
|
{
|
|
var typeName = enhancer.GetType().Name;
|
|
|
|
try
|
|
{
|
|
await enhancer.EnhanceImageAsync(item, inputPath, outputPath, imageType, imageIndex).ConfigureAwait(false);
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
_logger.ErrorException("{0} failed enhancing {1}", ex, typeName, item.Name);
|
|
|
|
throw;
|
|
}
|
|
|
|
// Feed the output into the next enhancer as input
|
|
inputPath = outputPath;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// The _semaphoreLocks
|
|
/// </summary>
|
|
private readonly ConcurrentDictionary<string, SemaphoreSlim> _semaphoreLocks = new ConcurrentDictionary<string, SemaphoreSlim>();
|
|
|
|
/// <summary>
|
|
/// Gets the lock.
|
|
/// </summary>
|
|
/// <param name="filename">The filename.</param>
|
|
/// <returns>System.Object.</returns>
|
|
private SemaphoreSlim GetLock(string filename)
|
|
{
|
|
return _semaphoreLocks.GetOrAdd(filename, key => new SemaphoreSlim(1, 1));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the cache path.
|
|
/// </summary>
|
|
/// <param name="path">The path.</param>
|
|
/// <param name="uniqueName">Name of the unique.</param>
|
|
/// <param name="fileExtension">The file extension.</param>
|
|
/// <returns>System.String.</returns>
|
|
/// <exception cref="System.ArgumentNullException">
|
|
/// path
|
|
/// or
|
|
/// uniqueName
|
|
/// or
|
|
/// fileExtension
|
|
/// </exception>
|
|
public string GetCachePath(string path, string uniqueName, string fileExtension)
|
|
{
|
|
if (string.IsNullOrEmpty(path))
|
|
{
|
|
throw new ArgumentNullException("path");
|
|
}
|
|
if (string.IsNullOrEmpty(uniqueName))
|
|
{
|
|
throw new ArgumentNullException("uniqueName");
|
|
}
|
|
|
|
if (string.IsNullOrEmpty(fileExtension))
|
|
{
|
|
throw new ArgumentNullException("fileExtension");
|
|
}
|
|
|
|
var filename = uniqueName.GetMD5() + fileExtension;
|
|
|
|
return GetCachePath(path, filename);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the cache path.
|
|
/// </summary>
|
|
/// <param name="path">The path.</param>
|
|
/// <param name="filename">The filename.</param>
|
|
/// <returns>System.String.</returns>
|
|
/// <exception cref="System.ArgumentNullException">
|
|
/// path
|
|
/// or
|
|
/// filename
|
|
/// </exception>
|
|
public string GetCachePath(string path, string filename)
|
|
{
|
|
if (string.IsNullOrEmpty(path))
|
|
{
|
|
throw new ArgumentNullException("path");
|
|
}
|
|
if (string.IsNullOrEmpty(filename))
|
|
{
|
|
throw new ArgumentNullException("filename");
|
|
}
|
|
|
|
var prefix = filename.Substring(0, 1);
|
|
|
|
path = Path.Combine(path, prefix);
|
|
|
|
return Path.Combine(path, filename);
|
|
}
|
|
|
|
public IEnumerable<IImageEnhancer> GetSupportedEnhancers(IHasImages item, ImageType imageType)
|
|
{
|
|
return ImageEnhancers.Where(i =>
|
|
{
|
|
try
|
|
{
|
|
return i.Supports(item, imageType);
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
_logger.ErrorException("Error in image enhancer: {0}", ex, i.GetType().Name);
|
|
|
|
return false;
|
|
}
|
|
|
|
});
|
|
}
|
|
|
|
public void Dispose()
|
|
{
|
|
Wand.CloseEnvironment();
|
|
_saveImageSizeTimer.Dispose();
|
|
}
|
|
}
|
|
}
|