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@ -3,7 +3,9 @@ using System.Text;
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using System.Text.Json; |
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using ExifLibrary; |
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using MetadataExtractor; |
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using MetadataExtractor.Formats.Exif; |
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using MetadataExtractor.Formats.Png; |
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using MetadataExtractor.Formats.WebP; |
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using Microsoft.VisualBasic; |
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using StabilityMatrix.Core.Extensions; |
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using StabilityMatrix.Core.Models; |
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@ -79,6 +81,14 @@ public class ImageMetadata
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string? ComfyNodes |
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) GetAllFileMetadata(FilePath filePath) |
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{ |
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if (filePath.Extension.Equals(".webp", StringComparison.OrdinalIgnoreCase)) |
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{ |
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var paramsJson = ReadTextChunkFromWebp(filePath, ExifDirectoryBase.TagImageDescription); |
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var smProj = ReadTextChunkFromWebp(filePath, ExifDirectoryBase.TagSoftware); |
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return (null, paramsJson, smProj, null); |
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} |
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using var stream = filePath.Info.OpenRead(); |
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using var reader = new BinaryReader(stream); |
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@ -234,32 +244,21 @@ public class ImageMetadata
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return memoryStream; |
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} |
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public static string ReadTextChunkFromWebp(FilePath filePath, ExifTag exifTag) |
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/// <summary> |
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/// Reads an EXIF tag from a webp file and returns the value as string |
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/// </summary> |
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/// <param name="filePath">The webp file to read EXIF data from</param> |
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/// <param name="exifTag">Use <see cref="ExifDirectoryBase"/> constants for the tag you'd like to search for</param> |
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/// <returns></returns> |
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public static string ReadTextChunkFromWebp(FilePath filePath, int exifTag) |
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{ |
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var sw = Stopwatch.StartNew(); |
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try |
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{ |
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var exifChunks = GetExifChunks(filePath); |
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if (exifChunks.Length == 0) |
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return string.Empty; |
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// write exifChunks to new memoryStream but skip first 6 bytes |
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using var newMemoryStream = new MemoryStream(exifChunks[6..]); |
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newMemoryStream.Seek(0, SeekOrigin.Begin); |
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var img = new MyTiffFile(newMemoryStream, Encoding.UTF8); |
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return img.Properties[exifTag]?.Value?.ToString() ?? string.Empty; |
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} |
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finally |
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{ |
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sw.Stop(); |
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Console.WriteLine($"ReadTextChunkFromWebp took {sw.ElapsedMilliseconds}ms"); |
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} |
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var exifDirs = WebPMetadataReader.ReadMetadata(filePath).OfType<ExifIfd0Directory>().FirstOrDefault(); |
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return exifDirs is null ? string.Empty : exifDirs.GetString(exifTag) ?? string.Empty; |
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} |
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public static IEnumerable<byte> AddMetadataToWebp( |
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byte[] inputImage, |
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GenerationParameters generationParameters |
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Dictionary<ExifTag, string> exifTagData |
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) |
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{ |
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using var byteStream = new BinaryReader(new MemoryStream(inputImage)); |
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@ -296,7 +295,11 @@ public class ImageMetadata
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using var stream = new MemoryStream(exifBytes[6..]); |
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var img = new MyTiffFile(stream, Encoding.UTF8); |
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img.Properties.Set(ExifTag.ImageDescription, JsonSerializer.Serialize(generationParameters)); |
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foreach (var (key, value) in exifTagData) |
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{ |
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img.Properties.Set(key, value); |
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} |
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using var newStream = new MemoryStream(); |
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img.Save(newStream); |
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@ -315,6 +318,7 @@ public class ImageMetadata
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newImage = newImage.Concat(new byte[] { 0x00 }).ToArray(); |
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} |
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// no clue why the minus 8 is needed but it is |
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var newImageSize = BitConverter.GetBytes(newImage.Length - 8); |
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newImage[4] = newImageSize[0]; |
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newImage[5] = newImageSize[1]; |
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JT
11 months ago