POLAR 84 libavfilter/avf_avectorscope.c { "polar", "", 0, AV_OPT_TYPE_CONST, {.i64=POLAR}, 0, 0, FLAGS, "mode" }, POLAR 229 libavfilter/avf_avectorscope.c s->prev_y = s->hh = s->mode == POLAR ? s->h - 1 : s->h / 2;