BLEND_SCREEN 129 libavfilter/vf_blend.c { "screen", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SCREEN}, 0, 0, FLAGS, "mode" },\ BLEND_SCREEN 338 libavfilter/vf_blend.c case BLEND_SCREEN: param->blend = blend_screen; break;