BLEND_NEGATION    122 libavfilter/vf_blend.c     { "negation",   "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NEGATION},   0, 0, FLAGS, "mode" },\
BLEND_NEGATION    331 libavfilter/vf_blend.c         case BLEND_NEGATION:   param->blend = blend_negation;   break;