VAR_CLIPVAL       178 libavfilter/vf_lut.c     double val    = s->var_values[VAR_CLIPVAL];
VAR_CLIPVAL       191 libavfilter/vf_lut.c     double val    = s->var_values[VAR_CLIPVAL];
VAR_CLIPVAL       320 libavfilter/vf_lut.c             s->var_values[VAR_CLIPVAL] = av_clip(val, min[color], max[color]);