public BitPumpJPEG(ImageBinaryReader reader, uint offset, uint count)
{
MIN_GET_BITS = (BITS_PER_LONG - 7);
size = (uint)(reader.RemainingSize + sizeof(uint));
buffer = new byte[size];
reader.BaseStream.Position = offset;
reader.Read(buffer, 0, (int)reader.RemainingSize);
Init();
}