HIST_POS          573 libavfilter/f_ebur128.c     ipower = av_clip(HIST_POS(loudness), 0, HIST_SIZE - 1);
HIST_POS          583 libavfilter/f_ebur128.c     gate_hist_pos = av_clip(HIST_POS(integ->rel_threshold), 0, HIST_SIZE - 1);