anchor.diff:          DCU = _processDU(fp, UDU, fdtbl_UV, DCU, UVDC_HT, UVAC_HT);
           DCV = _processDU(fp, VDU, fdtbl_UV, DCV, UVDC_HT, UVAC_HT);
   
  -        x += 8;
  +        x += 32;
         }
   
         y += 8;
  
positive.code:       0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
        0xf9, 0xfa ];
  
    static const List<int> std_dc_chrominance_nrcodes = const [
        0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 ];
  
    static const List<int> std_dc_chrominance_values = const [
        0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 ];
  
    static const List<int> std_ac_chrominance_nrcodes = const [
        0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 ];
  
    static const List<int> std_ac_chrominance_values = const [
        0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
        0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
        0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
  
negative.code: 
      // Do the bit alignment of the EOI marker
      if (_bytepos >= 0) {
        final fillbits = [(1 << (_bytepos + 1)) - 1, _bytepos + 1];
        _writeBits(fp, fillbits);
      }
  
  