ReadMetadata([NotNull] Stream stream)
{
// TIFF processing requires random access, as directories can be scattered throughout the byte sequence.
// Stream does not support seeking backwards, so we wrap it with IndexedCapturingReader, which
// buffers data from the stream as we seek forward.
var directories = new List<Directory>();
var handler = new ExifTiffHandler(directories, false);
TiffReader.ProcessTiff(new IndexedCapturingReader(stream), handler);
return directories;
}
ReadMetadata([NotNull] string filePath)
{
var directories = new List<Directory>();
using (var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read, 4096, FileOptions.RandomAccess))
{
var handler = new ExifTiffHandler(directories, storeThumbnailBytes: false);
TiffReader.ProcessTiff(new IndexedSeekingReader(stream), handler);
}
directories.Add(new FileMetadataReader().Read(filePath));
return directories;
}
public DirectoryList Extract([NotNull] IndexedReader reader)
{
var directories = new List <Directory>();
var exifTiffHandler = new ExifTiffHandler(directories);
try
{
// Read the TIFF-formatted Exif data
TiffReader.ProcessTiff(reader, exifTiffHandler);
}
catch (Exception e)
{
exifTiffHandler.Error("Exception processing TIFF data: " + e.Message);
}
return(directories);
}
