UJbig2ArithmeticDecoder constructor
Implementation
UJbig2ArithmeticDecoder(this.data, {this.start = 0, int? end}) : _end = end ?? data.length {
_bp = start;
_chigh = _byteAt(_bp);
_byteIn();
_chigh = ((_chigh << 7) & 0xFFFF) | ((_clow >> 9) & 0x7F);
_clow = (_clow << 7) & 0xFFFF;
_ct -= 7;
_a = 0x8000;
}