/// <summary>Reads metadata from an <see cref="Stream"/>.</summary>
/// <param name="stream">A stream from which the file data may be read. The stream must be positioned at the beginning of the file's data.</param>
/// <returns>A list of <see cref="Directory"/> instances containing the various types of metadata found within the file's data.</returns>
/// <exception cref="ImageProcessingException">The file type is unknown, or processing errors occurred.</exception>
/// <exception cref="System.IO.IOException"/>
public static DirectoryList ReadMetadata(Stream stream)
{
var fileType = FileTypeDetector.DetectFileType(stream);
var directories = new List <Directory>();
directories.AddRange(fileType switch
{
FileType.Arw => TiffMetadataReader.ReadMetadata(stream),
FileType.Avi => AviMetadataReader.ReadMetadata(stream),
FileType.Bmp => BmpMetadataReader.ReadMetadata(stream),
FileType.Crx => QuickTimeMetadataReader.ReadMetadata(stream),
FileType.Cr2 => TiffMetadataReader.ReadMetadata(stream),
FileType.Eps => EpsMetadataReader.ReadMetadata(stream),
FileType.Gif => GifMetadataReader.ReadMetadata(stream),
FileType.Ico => IcoMetadataReader.ReadMetadata(stream),
FileType.Jpeg => JpegMetadataReader.ReadMetadata(stream),
FileType.Mp3 => Mp3MetadataReader.ReadMetadata(stream),
FileType.Nef => TiffMetadataReader.ReadMetadata(stream),
FileType.Netpbm => new Directory[] { NetpbmMetadataReader.ReadMetadata(stream) },
FileType.Orf => TiffMetadataReader.ReadMetadata(stream),
FileType.Pcx => new Directory[] { PcxMetadataReader.ReadMetadata(stream) },
FileType.Png => PngMetadataReader.ReadMetadata(stream),
FileType.Psd => PsdMetadataReader.ReadMetadata(stream),
FileType.QuickTime => QuickTimeMetadataReader.ReadMetadata(stream),
FileType.Raf => RafMetadataReader.ReadMetadata(stream),
FileType.Rw2 => TiffMetadataReader.ReadMetadata(stream),
FileType.Tga => TgaMetadataReader.ReadMetadata(stream),
FileType.Tiff => TiffMetadataReader.ReadMetadata(stream),
FileType.Wav => WavMetadataReader.ReadMetadata(stream),
FileType.WebP => WebPMetadataReader.ReadMetadata(stream),
FileType.Unknown => throw new ImageProcessingException("File format could not be determined"),
_ => Enumerable.Empty <Directory>()
});
public virtual Task <Size> GetImageSize(byte[]?bytes)
{
return(Task.Run(() =>
{
if (bytes == null)
{
return Size.Empty;
}
try
{
using (var stream = new MemoryStream(bytes))
{
var type = FileTypeDetector.DetectFileType(stream);
stream.Seek(0, SeekOrigin.Begin);
switch (type)
{
case FileType.Jpeg:
var jpeg = JpegMetadataReader.ReadMetadata(stream);
var jpegdir = jpeg.OfType <JpegDirectory>().FirstOrDefault();
return new Size(jpegdir.GetImageWidth(), jpegdir.GetImageHeight());
case FileType.Png:
var png = PngMetadataReader.ReadMetadata(stream);
var pngdir = png.OfType <PngDirectory>().FirstOrDefault();
return new Size(pngdir.GetInt32(PngDirectory.TagImageWidth), pngdir.GetInt32(PngDirectory.TagImageHeight));
case FileType.Gif:
var gif = GifMetadataReader.ReadMetadata(stream);
var gifdir = gif.OfType <GifHeaderDirectory>().FirstOrDefault();
return new Size(gifdir.GetInt32(GifHeaderDirectory.TagImageWidth), gifdir.GetInt32(GifHeaderDirectory.TagImageHeight));
case FileType.WebP:
var webp = WebPMetadataReader.ReadMetadata(stream);
var webpdir = webp.OfType <WebPDirectory>().FirstOrDefault();
return new Size(webpdir.GetInt32(WebPDirectory.TagImageWidth), webpdir.GetInt32(WebPDirectory.TagImageHeight));
case FileType.Bmp:
var bmp = BmpMetadataReader.ReadMetadata(stream);
var bmpdir = bmp.OfType <BmpHeaderDirectory>().FirstOrDefault();
return new Size(bmpdir.GetInt32(BmpHeaderDirectory.TagImageWidth), bmpdir.GetInt32(BmpHeaderDirectory.TagImageHeight));
default:
return Size.Empty;
}
}
}
catch (Exception)
{
//Crashes.TrackError(e);
// No need to track this
}
return Size.Empty;
}));
}
ReadMetadata([NotNull] Stream stream)
{
var fileType = FileTypeDetector.DetectFileType(stream);
switch (fileType)
{
case FileType.Jpeg:
return(JpegMetadataReader.ReadMetadata(stream));
case FileType.Tiff:
case FileType.Arw:
case FileType.Cr2:
case FileType.Nef:
case FileType.Orf:
case FileType.Rw2:
return(TiffMetadataReader.ReadMetadata(stream));
case FileType.Psd:
return(PsdMetadataReader.ReadMetadata(stream));
case FileType.Png:
return(PngMetadataReader.ReadMetadata(stream));
case FileType.Bmp:
return(new Directory[] { BmpMetadataReader.ReadMetadata(stream) });
case FileType.Gif:
return(GifMetadataReader.ReadMetadata(stream));
case FileType.Ico:
return(IcoMetadataReader.ReadMetadata(stream));
case FileType.Pcx:
return(new Directory[] { PcxMetadataReader.ReadMetadata(stream) });
case FileType.Riff:
return(WebPMetadataReader.ReadMetadata(stream));
case FileType.Raf:
return(RafMetadataReader.ReadMetadata(stream));
case FileType.QuickTime:
return(QuickTimeMetadataReader.ReadMetadata(stream));
case FileType.Netpbm:
return(new Directory[] { NetpbmMetadataReader.ReadMetadata(stream) });
}
throw new ImageProcessingException("File format is not supported");
}
/// <summary>Reads metadata from an <see cref="Stream"/>.</summary>
/// <param name="stream">A stream from which the file data may be read. The stream must be positioned at the beginning of the file's data.</param>
/// <returns>A list of <see cref="Directory"/> instances containing the various types of metadata found within the file's data.</returns>
/// <exception cref="ImageProcessingException">The file type is unknown, or processing errors occurred.</exception>
/// <exception cref="System.IO.IOException"/>
public static DirectoryList ReadMetadata(Stream stream)
{
var fileType = FileTypeDetector.DetectFileType(stream);
var fileTypeDirectory = new FileTypeDirectory(fileType);
switch (fileType)
{
case FileType.Jpeg:
return(Append(JpegMetadataReader.ReadMetadata(stream), fileTypeDirectory));
case FileType.Tiff:
case FileType.Arw:
case FileType.Cr2:
case FileType.Nef:
case FileType.Orf:
case FileType.Rw2:
return(Append(TiffMetadataReader.ReadMetadata(stream), fileTypeDirectory));
case FileType.Psd:
return(Append(PsdMetadataReader.ReadMetadata(stream), fileTypeDirectory));
case FileType.Png:
return(Append(PngMetadataReader.ReadMetadata(stream), fileTypeDirectory));
case FileType.Bmp:
return(Append(BmpMetadataReader.ReadMetadata(stream), fileTypeDirectory));
case FileType.Gif:
return(Append(GifMetadataReader.ReadMetadata(stream), fileTypeDirectory));
case FileType.Ico:
return(Append(IcoMetadataReader.ReadMetadata(stream), fileTypeDirectory));
case FileType.Pcx:
return(new Directory[] { PcxMetadataReader.ReadMetadata(stream), fileTypeDirectory });
case FileType.WebP:
return(Append(WebPMetadataReader.ReadMetadata(stream), fileTypeDirectory));
case FileType.Avi:
return(Append(AviMetadataReader.ReadMetadata(stream), fileTypeDirectory));
case FileType.Wav:
return(Append(WavMetadataReader.ReadMetadata(stream), fileTypeDirectory));
case FileType.Raf:
return(Append(RafMetadataReader.ReadMetadata(stream), fileTypeDirectory));
case FileType.QuickTime:
case FileType.Crx:
return(Append(QuickTimeMetadataReader.ReadMetadata(stream), fileTypeDirectory));
case FileType.Netpbm:
return(new Directory[] { NetpbmMetadataReader.ReadMetadata(stream), fileTypeDirectory });
case FileType.Unknown:
throw new ImageProcessingException("File format could not be determined");
case FileType.Riff:
case FileType.Crw:
default:
throw new ImageProcessingException("File format is not supported");
}
protected override async Task <Metadata> ReadMetadata(
Metadata metadata,
MetadataReaderFileInfo fileInfo,
MetadataReaderOption option)
{
var directories = await _fileService.ReadFileStream(fileInfo.FileHandle, readStream =>
{
if (fileInfo.MimeType == MimeType.image_png)
{
return(ValueTask.FromResult(PngMetadataReader.ReadMetadata(readStream)));
}
if (fileInfo.MimeType == MimeType.image_jpeg)
{
return(ValueTask.FromResult(JpegMetadataReader.ReadMetadata(readStream)));
}
if (fileInfo.MimeType == MimeType.image_bmp)
{
return(ValueTask.FromResult(BmpMetadataReader.ReadMetadata(readStream)));
}
if (fileInfo.MimeType == MimeType.image_gif)
{
return(ValueTask.FromResult(GifMetadataReader.ReadMetadata(readStream)));
}
if (fileInfo.MimeType == MimeType.image_webp)
{
return(ValueTask.FromResult(WebPMetadataReader.ReadMetadata(readStream)));
}
return(ValueTask.FromResult(MetadataExtractor.ImageMetadataReader.ReadMetadata(readStream)));
});
foreach (var directory in directories)
{
if (directory is JpegDirectory jpegDirectory)
{
ParseJpegDirectory(jpegDirectory, metadata);
}
else if (directory is WebPDirectory webPDirectory)
{
ParseWebPDirectory(webPDirectory, metadata);
}
else if (directory is ExifIfd0Directory exifIfd0Directory)
{
ParseExifDirectory(exifIfd0Directory, metadata);
}
else if (directory is ExifSubIfdDirectory exifSubIfdDirectory)
{
ParseExifDirectory(exifSubIfdDirectory, metadata);
}
else if (directory is PngDirectory pngDirectory)
{
ParsePngDirectory(pngDirectory, metadata);
}
else if (directory is XmpDirectory xmpDirectory)
{
ParseXmpDirectory(xmpDirectory, metadata);
}
else if (directory is CanonMakernoteDirectory canonMakernoteDirectory)
{
ParseCanonMakernoteDirectory(canonMakernoteDirectory, metadata);
}
}
return(metadata);
}