NB_TYPES          632 libavfilter/af_anequalizer.c         s->filters[s->nb_filters].type = av_clip(s->filters[s->nb_filters].type, 0, NB_TYPES - 1);
NB_TYPES           52 libavfilter/af_asoftclip.c     { "type", "set softclip type", OFFSET(type), AV_OPT_TYPE_INT,    {.i64=0},          0, NB_TYPES-1, A, "types" },