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695 lines
28 KiB
C#
695 lines
28 KiB
C#
using MediaBrowser.Common.Extensions;
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using MediaBrowser.Common.IO;
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using MediaBrowser.Controller.Entities;
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using MediaBrowser.Controller.Entities.TV;
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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 System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Drawing.Imaging;
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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.Controller.Drawing
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{
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/// <summary>
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/// Class ImageManager
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/// </summary>
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public class ImageManager
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{
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/// <summary>
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/// Gets the image size cache.
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/// </summary>
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/// <value>The image size cache.</value>
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private FileSystemRepository ImageSizeCache { get; set; }
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/// <summary>
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/// Gets or sets the resized image cache.
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/// </summary>
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/// <value>The resized image cache.</value>
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private FileSystemRepository ResizedImageCache { get; set; }
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/// <summary>
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/// Gets the cropped image cache.
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/// </summary>
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/// <value>The cropped image cache.</value>
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private FileSystemRepository CroppedImageCache { get; set; }
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/// <summary>
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/// Gets the cropped image cache.
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/// </summary>
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/// <value>The cropped image cache.</value>
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private FileSystemRepository EnhancedImageCache { get; set; }
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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<string, ImageSize> _cachedImagedSizes = new ConcurrentDictionary<string, ImageSize>();
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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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/// <summary>
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/// The _kernel
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/// </summary>
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private readonly Kernel _kernel;
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/// <summary>
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/// The _locks
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/// </summary>
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private readonly ConcurrentDictionary<string, SemaphoreSlim> _locks = new ConcurrentDictionary<string, SemaphoreSlim>();
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/// <summary>
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/// Initializes a new instance of the <see cref="ImageManager" /> class.
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/// </summary>
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/// <param name="kernel">The kernel.</param>
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/// <param name="logger">The logger.</param>
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/// <param name="appPaths">The app paths.</param>
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public ImageManager(Kernel kernel, ILogger logger, IServerApplicationPaths appPaths)
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{
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_logger = logger;
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_kernel = kernel;
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ImageSizeCache = new FileSystemRepository(Path.Combine(appPaths.ImageCachePath, "image-sizes"));
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ResizedImageCache = new FileSystemRepository(Path.Combine(appPaths.ImageCachePath, "resized-images"));
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CroppedImageCache = new FileSystemRepository(Path.Combine(appPaths.ImageCachePath, "cropped-images"));
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EnhancedImageCache = new FileSystemRepository(Path.Combine(appPaths.ImageCachePath, "enhanced-images"));
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}
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/// <summary>
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/// Processes an image by resizing to target dimensions
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/// </summary>
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/// <param name="entity">The entity that owns the image</param>
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/// <param name="imageType">The image type</param>
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/// <param name="imageIndex">The image index (currently only used with backdrops)</param>
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/// <param name="cropWhitespace">if set to <c>true</c> [crop whitespace].</param>
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/// <param name="dateModified">The last date modified of the original image file</param>
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/// <param name="toStream">The stream to save the new image to</param>
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/// <param name="width">Use if a fixed width is required. Aspect ratio will be preserved.</param>
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/// <param name="height">Use if a fixed height is required. Aspect ratio will be preserved.</param>
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/// <param name="maxWidth">Use if a max width is required. Aspect ratio will be preserved.</param>
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/// <param name="maxHeight">Use if a max height is required. Aspect ratio will be preserved.</param>
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/// <param name="quality">Quality level, from 0-100. Currently only applies to JPG. The default value should suffice.</param>
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/// <returns>Task.</returns>
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/// <exception cref="System.ArgumentNullException">entity</exception>
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public async Task ProcessImage(BaseItem entity, ImageType imageType, int imageIndex, bool cropWhitespace, DateTime dateModified, Stream toStream, int? width, int? height, int? maxWidth, int? maxHeight, int? quality)
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{
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if (entity == null)
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{
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throw new ArgumentNullException("entity");
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}
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if (toStream == null)
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{
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throw new ArgumentNullException("toStream");
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}
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var originalImagePath = GetImagePath(entity, imageType, imageIndex);
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if (cropWhitespace)
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{
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originalImagePath = await GetCroppedImage(originalImagePath, dateModified).ConfigureAwait(false);
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}
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try
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{
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// Enhance if we have enhancers
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var ehnancedImagePath = await GetEnhancedImage(originalImagePath, dateModified, entity, imageType, imageIndex).ConfigureAwait(false);
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// If the path changed update dateModified
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if (!ehnancedImagePath.Equals(originalImagePath, StringComparison.OrdinalIgnoreCase))
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{
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dateModified = File.GetLastWriteTimeUtc(ehnancedImagePath);
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originalImagePath = ehnancedImagePath;
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}
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}
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catch (Exception ex)
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{
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_logger.Error("Error enhancing image", ex);
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}
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var originalImageSize = await GetImageSize(originalImagePath, dateModified).ConfigureAwait(false);
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// Determine the output size based on incoming parameters
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var newSize = DrawingUtils.Resize(originalImageSize, width, height, maxWidth, maxHeight);
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if (!quality.HasValue)
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{
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quality = 90;
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}
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var cacheFilePath = GetCacheFilePath(originalImagePath, newSize, quality.Value, dateModified);
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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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if (File.Exists(cacheFilePath))
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{
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try
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{
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using (var fileStream = new FileStream(cacheFilePath, FileMode.Open, FileAccess.Read, FileShare.Read, StreamDefaults.DefaultFileStreamBufferSize, FileOptions.Asynchronous))
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{
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await fileStream.CopyToAsync(toStream).ConfigureAwait(false);
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return;
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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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try
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{
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using (var fileStream = new FileStream(originalImagePath, FileMode.Open, FileAccess.Read, FileShare.Read, StreamDefaults.DefaultFileStreamBufferSize, true))
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{
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// Copy to memory stream to avoid Image locking file
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using (var memoryStream = new MemoryStream())
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{
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await fileStream.CopyToAsync(memoryStream).ConfigureAwait(false);
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using (var originalImage = Image.FromStream(fileStream, true, false))
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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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// Graphics.FromImage will throw an exception if the PixelFormat is Indexed, so we need to handle that here
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using (var thumbnail = !ImageExtensions.IsPixelFormatSupportedByGraphicsObject(originalImage.PixelFormat) ? new Bitmap(originalImage, newWidth, newHeight) : new Bitmap(newWidth, newHeight, originalImage.PixelFormat))
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{
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// Preserve the original resolution
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thumbnail.SetResolution(originalImage.HorizontalResolution, originalImage.VerticalResolution);
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using (var thumbnailGraph = Graphics.FromImage(thumbnail))
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{
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thumbnailGraph.CompositingQuality = CompositingQuality.HighQuality;
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thumbnailGraph.SmoothingMode = SmoothingMode.HighQuality;
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thumbnailGraph.InterpolationMode = InterpolationMode.HighQualityBicubic;
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thumbnailGraph.PixelOffsetMode = PixelOffsetMode.HighQuality;
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thumbnailGraph.CompositingMode = CompositingMode.SourceOver;
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thumbnailGraph.DrawImage(originalImage, 0, 0, newWidth, newHeight);
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var outputFormat = originalImage.RawFormat;
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using (var outputMemoryStream = new MemoryStream())
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{
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// Save to the memory stream
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thumbnail.Save(outputFormat, outputMemoryStream, quality.Value);
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var bytes = outputMemoryStream.ToArray();
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var outputTask = toStream.WriteAsync(bytes, 0, bytes.Length);
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// kick off a task to cache the result
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await CacheResizedImage(cacheFilePath, bytes).ConfigureAwait(false);
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await outputTask.ConfigureAwait(false);
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}
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}
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}
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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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/// <summary>
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/// Caches the resized image.
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/// </summary>
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/// <param name="cacheFilePath">The cache file path.</param>
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/// <param name="bytes">The bytes.</param>
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private async Task CacheResizedImage(string cacheFilePath, byte[] bytes)
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{
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// Save to the cache location
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using (var cacheFileStream = new FileStream(cacheFilePath, FileMode.Create, FileAccess.Write, FileShare.Read, StreamDefaults.DefaultFileStreamBufferSize, FileOptions.Asynchronous))
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{
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// Save to the filestream
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await cacheFileStream.WriteAsync(bytes, 0, bytes.Length).ConfigureAwait(false);
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}
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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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/// <param name="originalPath">The path to the original image file</param>
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/// <param name="outputSize">The size to output the image in</param>
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/// <param name="quality">Quality level, from 0-100. Currently only applies to JPG. The default value should suffice.</param>
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/// <param name="dateModified">The last modified date of the image</param>
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/// <returns>System.String.</returns>
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private string GetCacheFilePath(string originalPath, ImageSize outputSize, int quality, DateTime dateModified)
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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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return ResizedImageCache.GetResourcePath(filename, Path.GetExtension(originalPath));
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}
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/// <summary>
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/// Gets image dimensions
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/// </summary>
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/// <param name="imagePath">The image path.</param>
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/// <param name="dateModified">The date modified.</param>
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/// <returns>Task{ImageSize}.</returns>
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/// <exception cref="System.ArgumentNullException">imagePath</exception>
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public async Task<ImageSize> GetImageSize(string imagePath, DateTime dateModified)
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{
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if (string.IsNullOrEmpty(imagePath))
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{
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throw new ArgumentNullException("imagePath");
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}
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var name = imagePath + "datemodified=" + dateModified.Ticks;
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ImageSize size;
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if (!_cachedImagedSizes.TryGetValue(name, out size))
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{
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size = await GetImageSize(name, imagePath).ConfigureAwait(false);
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_cachedImagedSizes.AddOrUpdate(name, size, (keyName, oldValue) => size);
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}
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return size;
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}
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protected readonly CultureInfo UsCulture = new CultureInfo("en-US");
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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="keyName">Name of the key.</param>
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/// <param name="imagePath">The image path.</param>
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/// <returns>ImageSize.</returns>
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private async Task<ImageSize> GetImageSize(string keyName, string imagePath)
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{
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// Now check the file system cache
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var fullCachePath = ImageSizeCache.GetResourcePath(keyName, ".txt");
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var semaphore = GetLock(fullCachePath);
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await semaphore.WaitAsync().ConfigureAwait(false);
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try
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{
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try
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{
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var result = File.ReadAllText(fullCachePath).Split('|').Select(i => double.Parse(i, UsCulture)).ToArray();
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return new ImageSize { Width = result[0], Height = result[1] };
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}
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catch (FileNotFoundException)
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{
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// Cache file doesn't exist no biggie
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}
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var size = await ImageHeader.GetDimensions(imagePath, _logger).ConfigureAwait(false);
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// Update the file system cache
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File.WriteAllText(fullCachePath, size.Width.ToString(UsCulture) + @"|" + size.Height.ToString(UsCulture));
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return new ImageSize { Width = size.Width, Height = size.Height };
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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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/// <summary>
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/// Gets the image path.
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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>System.String.</returns>
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/// <exception cref="System.ArgumentNullException">item</exception>
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/// <exception cref="System.InvalidOperationException"></exception>
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public string GetImagePath(BaseItem item, ImageType imageType, int imageIndex)
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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 (imageType == ImageType.Backdrop)
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{
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if (item.BackdropImagePaths == null)
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{
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throw new InvalidOperationException(string.Format("Item {0} does not have any Backdrops.", item.Name));
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}
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return item.BackdropImagePaths[imageIndex];
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}
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if (imageType == ImageType.Screenshot)
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{
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if (item.ScreenshotImagePaths == null)
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{
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throw new InvalidOperationException(string.Format("Item {0} does not have any Screenshots.", item.Name));
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}
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return item.ScreenshotImagePaths[imageIndex];
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}
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if (imageType == ImageType.Chapter)
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{
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var video = (Video)item;
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if (video.Chapters == null)
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{
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throw new InvalidOperationException(string.Format("Item {0} does not have any Chapters.", item.Name));
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}
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return video.Chapters[imageIndex].ImagePath;
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}
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return item.GetImage(imageType);
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}
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/// <summary>
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/// Gets the image date modified.
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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>DateTime.</returns>
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/// <exception cref="System.ArgumentNullException">item</exception>
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public DateTime GetImageDateModified(BaseItem item, ImageType imageType, int imageIndex)
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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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var imagePath = GetImagePath(item, imageType, imageIndex);
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return GetImageDateModified(item, imagePath);
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}
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/// <summary>
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/// Gets the image date modified.
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/// </summary>
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/// <param name="item">The item.</param>
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/// <param name="imagePath">The image path.</param>
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/// <returns>DateTime.</returns>
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/// <exception cref="System.ArgumentNullException">item</exception>
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public DateTime GetImageDateModified(BaseItem item, string imagePath)
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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 (string.IsNullOrEmpty(imagePath))
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{
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throw new ArgumentNullException("imagePath");
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}
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var metaFileEntry = item.ResolveArgs.GetMetaFileByPath(imagePath);
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// If we didn't the metafile entry, check the Season
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if (metaFileEntry == null)
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{
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var episode = item as Episode;
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if (episode != null && episode.Season != null)
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{
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episode.Season.ResolveArgs.GetMetaFileByPath(imagePath);
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}
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}
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// See if we can avoid a file system lookup by looking for the file in ResolveArgs
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return metaFileEntry == null ? File.GetLastWriteTimeUtc(imagePath) : metaFileEntry.LastWriteTimeUtc;
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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<string> GetCroppedImage(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 = CroppedImageCache.GetResourcePath(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 (CroppedImageCache.ContainsFilePath(croppedImagePath))
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{
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semaphore.Release();
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return croppedImagePath;
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}
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try
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{
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using (var fileStream = new FileStream(originalImagePath, FileMode.Open, FileAccess.Read, FileShare.Read, StreamDefaults.DefaultFileStreamBufferSize, true))
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{
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// Copy to memory stream to avoid Image locking file
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using (var memoryStream = new MemoryStream())
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{
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await fileStream.CopyToAsync(memoryStream).ConfigureAwait(false);
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using (var originalImage = (Bitmap)Image.FromStream(memoryStream, true, false))
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{
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var outputFormat = originalImage.RawFormat;
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using (var croppedImage = originalImage.CropWhitespace())
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{
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using (var outputStream = new FileStream(croppedImagePath, FileMode.Create, FileAccess.Write, FileShare.Read))
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{
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croppedImage.Save(outputFormat, outputStream, 100);
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}
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}
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}
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}
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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 originalImagePath;
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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 croppedImagePath;
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}
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/// <summary>
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/// Runs an image through the image enhancers, 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 of the original image file.</param>
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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>System.String.</returns>
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/// <exception cref="System.ArgumentNullException">originalImagePath</exception>
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public async Task<string> GetEnhancedImage(string originalImagePath, DateTime dateModified, BaseItem item, ImageType imageType, int imageIndex)
|
|
{
|
|
if (string.IsNullOrEmpty(originalImagePath))
|
|
{
|
|
throw new ArgumentNullException("originalImagePath");
|
|
}
|
|
|
|
if (item == null)
|
|
{
|
|
throw new ArgumentNullException("item");
|
|
}
|
|
|
|
var supportedEnhancers = _kernel.ImageEnhancers.Where(i => i.Supports(item, imageType)).ToList();
|
|
|
|
// No enhancement - don't cache
|
|
if (supportedEnhancers.Count == 0)
|
|
{
|
|
return originalImagePath;
|
|
}
|
|
|
|
var cacheGuid = GetImageCacheTag(originalImagePath, dateModified, supportedEnhancers, item, imageType);
|
|
|
|
// All enhanced images are saved as png to allow transparency
|
|
var enhancedImagePath = EnhancedImageCache.GetResourcePath(cacheGuid + ".png");
|
|
|
|
var semaphore = GetLock(enhancedImagePath);
|
|
|
|
await semaphore.WaitAsync().ConfigureAwait(false);
|
|
|
|
// Check again in case of contention
|
|
if (EnhancedImageCache.ContainsFilePath(enhancedImagePath))
|
|
{
|
|
semaphore.Release();
|
|
return enhancedImagePath;
|
|
}
|
|
|
|
try
|
|
{
|
|
using (var fileStream = new FileStream(originalImagePath, FileMode.Open, FileAccess.Read, FileShare.Read, StreamDefaults.DefaultFileStreamBufferSize, true))
|
|
{
|
|
// Copy to memory stream to avoid Image locking file
|
|
using (var memoryStream = new MemoryStream())
|
|
{
|
|
await fileStream.CopyToAsync(memoryStream).ConfigureAwait(false);
|
|
|
|
using (var originalImage = Image.FromStream(memoryStream, true, false))
|
|
{
|
|
//Pass the image through registered enhancers
|
|
using (var newImage = await ExecuteImageEnhancers(supportedEnhancers, originalImage, item, imageType, imageIndex).ConfigureAwait(false))
|
|
{
|
|
//And then save it in the cache
|
|
using (var outputStream = new FileStream(enhancedImagePath, FileMode.Create, FileAccess.Write, FileShare.Read))
|
|
{
|
|
newImage.Save(ImageFormat.Png, outputStream, 100);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
semaphore.Release();
|
|
}
|
|
|
|
return enhancedImagePath;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the image cache tag.
|
|
/// </summary>
|
|
/// <param name="item">The item.</param>
|
|
/// <param name="imageType">Type of the image.</param>
|
|
/// <param name="imagePath">The image path.</param>
|
|
/// <returns>Guid.</returns>
|
|
/// <exception cref="System.ArgumentNullException">item</exception>
|
|
public Guid GetImageCacheTag(BaseItem item, ImageType imageType, string imagePath)
|
|
{
|
|
if (item == null)
|
|
{
|
|
throw new ArgumentNullException("item");
|
|
}
|
|
|
|
if (string.IsNullOrEmpty(imagePath))
|
|
{
|
|
throw new ArgumentNullException("imagePath");
|
|
}
|
|
|
|
var dateModified = GetImageDateModified(item, imagePath);
|
|
|
|
var supportedEnhancers = _kernel.ImageEnhancers.Where(i => i.Supports(item, imageType));
|
|
|
|
return GetImageCacheTag(imagePath, dateModified, supportedEnhancers, item, imageType);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the image cache tag.
|
|
/// </summary>
|
|
/// <param name="originalImagePath">The original image path.</param>
|
|
/// <param name="dateModified">The date modified of the original image file.</param>
|
|
/// <param name="imageEnhancers">The image enhancers.</param>
|
|
/// <param name="item">The item.</param>
|
|
/// <param name="imageType">Type of the image.</param>
|
|
/// <returns>Guid.</returns>
|
|
/// <exception cref="System.ArgumentNullException">item</exception>
|
|
public Guid GetImageCacheTag(string originalImagePath, DateTime dateModified, IEnumerable<IImageEnhancer> imageEnhancers, BaseItem item, ImageType imageType)
|
|
{
|
|
if (item == null)
|
|
{
|
|
throw new ArgumentNullException("item");
|
|
}
|
|
|
|
if (imageEnhancers == null)
|
|
{
|
|
throw new ArgumentNullException("imageEnhancers");
|
|
}
|
|
|
|
if (string.IsNullOrEmpty(originalImagePath))
|
|
{
|
|
throw new ArgumentNullException("originalImagePath");
|
|
}
|
|
|
|
// Cache name is created with supported enhancers combined with the last config change so we pick up new config changes
|
|
var cacheKeys = imageEnhancers.Select(i => i.GetType().Name + i.LastConfigurationChange(item, imageType).Ticks).ToList();
|
|
cacheKeys.Add(originalImagePath + dateModified.Ticks);
|
|
|
|
return string.Join("|", cacheKeys.ToArray()).GetMD5();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Executes the image enhancers.
|
|
/// </summary>
|
|
/// <param name="imageEnhancers">The image enhancers.</param>
|
|
/// <param name="originalImage">The original image.</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<Image> ExecuteImageEnhancers(IEnumerable<IImageEnhancer> imageEnhancers, Image originalImage, BaseItem item, ImageType imageType, int imageIndex)
|
|
{
|
|
var result = originalImage;
|
|
|
|
// Run the enhancers sequentially in order of priority
|
|
foreach (var enhancer in imageEnhancers)
|
|
{
|
|
var typeName = enhancer.GetType().Name;
|
|
|
|
try
|
|
{
|
|
result = await enhancer.EnhanceImageAsync(item, result, imageType, imageIndex).ConfigureAwait(false);
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
_logger.ErrorException("{0} failed enhancing {1}", ex, typeName, item.Name);
|
|
|
|
throw;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the lock.
|
|
/// </summary>
|
|
/// <param name="filename">The filename.</param>
|
|
/// <returns>System.Object.</returns>
|
|
private SemaphoreSlim GetLock(string filename)
|
|
{
|
|
return _locks.GetOrAdd(filename, key => new SemaphoreSlim(1, 1));
|
|
}
|
|
}
|
|
}
|