HUFF_EXTEND       573 jdhuff.c       #define HUFF_EXTEND(x,s)  ((x) < (1<<((s)-1)) ? (x) - ((1<<(s))-1) : (x))
HUFF_EXTEND       578 jdhuff.c       #define HUFF_EXTEND(x,s)  ((x) <= bmask[(s) - 1] ? (x) - bmask[s] : (x))