CIRCLEOPEN        169 libavfilter/vf_xfade.c     {   "circleopen", "circleopen transition",  0, AV_OPT_TYPE_CONST, {.i64=CIRCLEOPEN}, 0, 0, FLAGS, "transition" },
CIRCLEOPEN       1412 libavfilter/vf_xfade.c     case CIRCLEOPEN: s->transitionf = s->depth <= 8 ? circleopen8_transition : circleopen16_transition; break;