use taglibsharp to read image sizes

3 files changed, 18 insertions, 245 deletions

diff --git a/Emby.Drawing/Common/ImageHeader.cs b/Emby.Drawing/Common/ImageHeader.cs
deleted file mode 100644
index 1c70b3bb6c..0000000000
--- a/Emby.Drawing/Common/ImageHeader.cs
+++ /dev/null
@@ -1,223 +0,0 @@
-using MediaBrowser.Common.IO;
-using MediaBrowser.Model.Drawing;
-using MediaBrowser.Model.Logging;
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-
-namespace Emby.Drawing.Common
-{
-    /// <summary>
-    /// Taken from http://stackoverflow.com/questions/111345/getting-image-dimensions-without-reading-the-entire-file/111349
-    /// http://www.codeproject.com/Articles/35978/Reading-Image-Headers-to-Get-Width-and-Height
-    /// Minor improvements including supporting unsigned 16-bit integers when decoding Jfif and added logic
-    /// to load the image using new Bitmap if reading the headers fails
-    /// </summary>
-    public static class ImageHeader
-    {
-        /// <summary>
-        /// The error message
-        /// </summary>
-        const string ErrorMessage = "Could not recognize image format.";
-
-        /// <summary>
-        /// The image format decoders
-        /// </summary>
-        private static readonly KeyValuePair<byte[], Func<BinaryReader, ImageSize>>[] ImageFormatDecoders = new Dictionary<byte[], Func<BinaryReader, ImageSize>>
-        { 
-            { new byte[] { 0x42, 0x4D }, DecodeBitmap }, 
-            { new byte[] { 0x47, 0x49, 0x46, 0x38, 0x37, 0x61 }, DecodeGif }, 
-            { new byte[] { 0x47, 0x49, 0x46, 0x38, 0x39, 0x61 }, DecodeGif }, 
-            { new byte[] { 0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A }, DecodePng },
-            { new byte[] { 0xff, 0xd8 }, DecodeJfif }
-
-        }.ToArray();
-
-        private static readonly int MaxMagicBytesLength = ImageFormatDecoders.Select(i => i.Key.Length).OrderByDescending(i => i).First();
-
-        /// <summary>
-        /// Gets the dimensions of an image.
-        /// </summary>
-        /// <param name="path">The path of the image to get the dimensions of.</param>
-        /// <param name="logger">The logger.</param>
-        /// <param name="fileSystem">The file system.</param>
-        /// <returns>The dimensions of the specified image.</returns>
-        /// <exception cref="ArgumentException">The image was of an unrecognised format.</exception>
-        public static ImageSize GetDimensions(string path, ILogger logger, IFileSystem fileSystem)
-        {
-			using (var fs = fileSystem.OpenRead(path))
-            {
-                using (var binaryReader = new BinaryReader(fs))
-                {
-                    return GetDimensions(binaryReader);
-                }
-            }
-        }
-
-        /// <summary>
-        /// Gets the dimensions of an image.
-        /// </summary>
-        /// <param name="binaryReader">The binary reader.</param>
-        /// <returns>Size.</returns>
-        /// <exception cref="System.ArgumentException">binaryReader</exception>
-        /// <exception cref="ArgumentException">The image was of an unrecognized format.</exception>
-        private static ImageSize GetDimensions(BinaryReader binaryReader)
-        {
-            var magicBytes = new byte[MaxMagicBytesLength];
-
-            for (var i = 0; i < MaxMagicBytesLength; i += 1)
-            {
-                magicBytes[i] = binaryReader.ReadByte();
-
-                foreach (var kvPair in ImageFormatDecoders)
-                {
-                    if (StartsWith(magicBytes, kvPair.Key))
-                    {
-                        return kvPair.Value(binaryReader);
-                    }
-                }
-            }
-
-            throw new ArgumentException(ErrorMessage, "binaryReader");
-        }
-
-        /// <summary>
-        /// Startses the with.
-        /// </summary>
-        /// <param name="thisBytes">The this bytes.</param>
-        /// <param name="thatBytes">The that bytes.</param>
-        /// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
-        private static bool StartsWith(byte[] thisBytes, byte[] thatBytes)
-        {
-            for (int i = 0; i < thatBytes.Length; i += 1)
-            {
-                if (thisBytes[i] != thatBytes[i])
-                {
-                    return false;
-                }
-            }
-
-            return true;
-        }
-
-        /// <summary>
-        /// Reads the little endian int16.
-        /// </summary>
-        /// <param name="binaryReader">The binary reader.</param>
-        /// <returns>System.Int16.</returns>
-        private static short ReadLittleEndianInt16(BinaryReader binaryReader)
-        {
-            var bytes = new byte[sizeof(short)];
-
-            for (int i = 0; i < sizeof(short); i += 1)
-            {
-                bytes[sizeof(short) - 1 - i] = binaryReader.ReadByte();
-            }
-            return BitConverter.ToInt16(bytes, 0);
-        }
-
-        /// <summary>
-        /// Reads the little endian int32.
-        /// </summary>
-        /// <param name="binaryReader">The binary reader.</param>
-        /// <returns>System.Int32.</returns>
-        private static int ReadLittleEndianInt32(BinaryReader binaryReader)
-        {
-            var bytes = new byte[sizeof(int)];
-            for (int i = 0; i < sizeof(int); i += 1)
-            {
-                bytes[sizeof(int) - 1 - i] = binaryReader.ReadByte();
-            }
-            return BitConverter.ToInt32(bytes, 0);
-        }
-
-        /// <summary>
-        /// Decodes the bitmap.
-        /// </summary>
-        /// <param name="binaryReader">The binary reader.</param>
-        /// <returns>Size.</returns>
-        private static ImageSize DecodeBitmap(BinaryReader binaryReader)
-        {
-            binaryReader.ReadBytes(16);
-            int width = binaryReader.ReadInt32();
-            int height = binaryReader.ReadInt32();
-            return new ImageSize
-            {
-                Width = width,
-                Height = height
-            };
-        }
-
-        /// <summary>
-        /// Decodes the GIF.
-        /// </summary>
-        /// <param name="binaryReader">The binary reader.</param>
-        /// <returns>Size.</returns>
-        private static ImageSize DecodeGif(BinaryReader binaryReader)
-        {
-            int width = binaryReader.ReadInt16();
-            int height = binaryReader.ReadInt16();
-            return new ImageSize
-            {
-                Width = width,
-                Height = height
-            };
-        }
-
-        /// <summary>
-        /// Decodes the PNG.
-        /// </summary>
-        /// <param name="binaryReader">The binary reader.</param>
-        /// <returns>Size.</returns>
-        private static ImageSize DecodePng(BinaryReader binaryReader)
-        {
-            binaryReader.ReadBytes(8);
-            int width = ReadLittleEndianInt32(binaryReader);
-            int height = ReadLittleEndianInt32(binaryReader);
-            return new ImageSize
-            {
-                Width = width,
-                Height = height
-            };
-        }
-
-        /// <summary>
-        /// Decodes the jfif.
-        /// </summary>
-        /// <param name="binaryReader">The binary reader.</param>
-        /// <returns>Size.</returns>
-        /// <exception cref="System.ArgumentException"></exception>
-        private static ImageSize DecodeJfif(BinaryReader binaryReader)
-        {
-            while (binaryReader.ReadByte() == 0xff)
-            {
-                byte marker = binaryReader.ReadByte();
-                short chunkLength = ReadLittleEndianInt16(binaryReader);
-                if (marker == 0xc0)
-                {
-                    binaryReader.ReadByte();
-                    int height = ReadLittleEndianInt16(binaryReader);
-                    int width = ReadLittleEndianInt16(binaryReader);
-                    return new ImageSize
-                    {
-                        Width = width,
-                        Height = height
-                    };
-                }
-
-                if (chunkLength < 0)
-                {
-                    var uchunkLength = (ushort)chunkLength;
-                    binaryReader.ReadBytes(uchunkLength - 2);
-                }
-                else
-                {
-                    binaryReader.ReadBytes(chunkLength - 2);
-                }
-            }
-
-            throw new ArgumentException(ErrorMessage);
-        }
-    }
-}
diff --git a/Emby.Drawing/Emby.Drawing.csproj b/Emby.Drawing/Emby.Drawing.csproj
index ab53f75500..cbc9966597 100644
--- a/Emby.Drawing/Emby.Drawing.csproj
+++ b/Emby.Drawing/Emby.Drawing.csproj
@@ -36,6 +36,9 @@
       <SpecificVersion>False</SpecificVersion>
       <HintPath>..\packages\ImageMagickSharp.1.0.0.16\lib\net45\ImageMagickSharp.dll</HintPath>
     </Reference>
+    <Reference Include="policy.2.0.taglib-sharp">
+      <HintPath>..\packages\taglib.2.1.0.0\lib\policy.2.0.taglib-sharp.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="System.Drawing" />
@@ -44,6 +47,9 @@
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Data" />
     <Reference Include="System.Xml" />
+    <Reference Include="taglib-sharp">
+      <HintPath>..\packages\taglib.2.1.0.0\lib\taglib-sharp.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\SharedVersion.cs">
@@ -56,7 +62,6 @@
     <Compile Include="GDI\PlayedIndicatorDrawer.cs" />
     <Compile Include="GDI\UnplayedCountIndicator.cs" />
     <Compile Include="IImageEncoder.cs" />
-    <Compile Include="Common\ImageHeader.cs" />
     <Compile Include="ImageHelpers.cs" />
     <Compile Include="ImageMagick\ImageMagickEncoder.cs" />
     <Compile Include="ImageMagick\StripCollageBuilder.cs" />
diff --git a/Emby.Drawing/ImageProcessor.cs b/Emby.Drawing/ImageProcessor.cs
index d4fce76d02..3faa3e3e9a 100644
--- a/Emby.Drawing/ImageProcessor.cs
+++ b/Emby.Drawing/ImageProcessor.cs
@@ -1,5 +1,4 @@
-using Emby.Drawing.Common;
-using MediaBrowser.Common.Extensions;
+using MediaBrowser.Common.Extensions;
 using MediaBrowser.Common.IO;
 using MediaBrowser.Controller;
 using MediaBrowser.Controller.Drawing;
@@ -399,6 +398,8 @@ namespace Emby.Drawing
             {
                 size = GetImageSizeInternal(path, allowSlowMethod);
 
+                StartSaveImageSizeTimer();
+                
                 _cachedImagedSizes.AddOrUpdate(cacheHash, size, (keyName, oldValue) => size);
             }
 
@@ -413,28 +414,18 @@ namespace Emby.Drawing
         /// <returns>ImageSize.</returns>
         private ImageSize GetImageSizeInternal(string path, bool allowSlowMethod)
         {
-            ImageSize size;
-
-            try
+            using (var file = TagLib.File.Create(path))
             {
-                size = ImageHeader.GetDimensions(path, _logger, _fileSystem);
-            }
-            catch
-            {
-                if (!allowSlowMethod)
-                {
-                    throw;
-                }
-                //_logger.Info("Failed to read image header for {0}. Doing it the slow way.", path);
-
-                CheckDisposed();
+                var image = file as TagLib.Image.File;
 
-                size = _imageEncoder.GetImageSize(path);
+                var properties = image.Properties;
+                
+                return new ImageSize
+                {
+                    Height = properties.PhotoHeight,
+                    Width = properties.PhotoWidth
+                };
             }
-
-            StartSaveImageSizeTimer();
-
-            return size;
         }
 
         private readonly Timer _saveImageSizeTimer;