HIST_SIZE          64 libavfilter/f_ebur128.c #define HIST_SIZE  ((ABS_UP_THRES - ABS_THRES) * HIST_GRAIN + 1)
HIST_SIZE          25 libavfilter/vf_idet.h #define HIST_SIZE 4
HIST_SIZE          59 libavfilter/vf_palettegen.c #define HIST_SIZE (1<<(3*NBITS))
HIST_SIZE          34 libavfilter/vf_thumbnail.c #define HIST_SIZE (3*256)