PLANE_A            59 libavfilter/vf_extractplanes.c     {      "a", "set alpha plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_A}, 0, 0, FLAGS, "flags"},
PLANE_A           212 libavfilter/vf_extractplanes.c                   ((desc->flags & AV_PIX_FMT_FLAG_ALPHA) ? PLANE_A : 0);
PLANE_A           389 libavfilter/vf_extractplanes.c     s->requested_planes = PLANE_A;