_MakeDecoder
_MakeDecoder(source, level + 1);
_MakeDecoder(source, level + 1);
dp = _MakeDecoder(++dp, 0);
_MakeDecoder(kFirstTree[table], 0);
_MakeDecoder(kSecondTree[table], 0);
uchar *_MakeDecoder(const uchar* source, int level);