HIST_C1_BITS      138 jquant2.c      #define HIST_C1_ELEMS  (1<<HIST_C1_BITS)
HIST_C1_BITS      143 jquant2.c      #define C1_SHIFT  (BITS_IN_JSAMPLE-HIST_C1_BITS)
HIST_C1_BITS      625 jquant2.c      #define BOX_C1_LOG  (HIST_C1_BITS-3)