public RAFDecoder(Stream file) : base(file, true)
{
//alt_layout = false;
// FUJI has pointers to IFD's at fixed byte offsets
// So if camera is FUJI, we cannot use ordinary TIFF parser
//get first 8 char and see if equal fuji
file.Position = 0;
var data = new byte[110];
file.Read(data, 0, 8);
string dataAsString = System.Text.Encoding.UTF8.GetString(data.Take(8).ToArray());
if (dataAsString != "FUJIFILM")
{
throw new RawDecoderException("Header is wrong");
}
//Fuji is indexer reverse endian
reader = new ImageBinaryReaderBigEndian(file);
reader.BaseStream.Position = 8;
//read next 8 byte
dataAsString = System.Text.Encoding.ASCII.GetString(reader.ReadBytes(8).ToArray()).Trim();
//4 byte version
var version = System.Text.Encoding.ASCII.GetString(reader.ReadBytes(4).ToArray());
//8 bytes unknow ??
var unknow = System.Text.Encoding.ASCII.GetString(reader.ReadBytes(8).ToArray()).Trim();
//32 byte a string (camera model)
dataAsString = System.Text.Encoding.ASCII.GetString(reader.ReadBytes(32).ToArray()).Trim();
//Directory
//4 bytes version
version = System.Text.Encoding.ASCII.GetString(reader.ReadBytes(4).ToArray());
//20 bytes unkown ??
dataAsString = System.Text.Encoding.ASCII.GetString(reader.ReadBytes(20).ToArray()).Trim();
//parse the ifd
uint first_ifd = reader.ReadUInt32();
relativeOffset = first_ifd + 12;
reader.ReadInt32();
//raw header
// RAW information IFD on older
uint third_ifd = reader.ReadUInt32();
reader.ReadUInt32();
uint secondIFD = reader.ReadUInt32();
uint count = reader.ReadUInt32();
try
{
Parse(secondIFD);
}
catch (Exception)
{
//old format
ifd = new IFD(Endianness.Big, 0);
//raw image
var entry = new Tag(TagType.FUJI_STRIPOFFSETS, TiffDataType.LONG, 1);
entry.data[0] = secondIFD;
ifd.tags.Add(entry.TagId, entry);
entry = new Tag(TagType.FUJI_STRIPBYTECOUNTS, TiffDataType.LONG, 1);
entry.data[0] = count;
ifd.tags.Add(entry.TagId, entry);
}
Parse(first_ifd + 12);
ParseFuji(third_ifd);
}
