DESIRED_MODE       72 libavfilter/af_anlms.c     {  "d", "desired",               0,          AV_OPT_TYPE_CONST,    {.i64=DESIRED_MODE}, 0, 0, AT, "mode" },
DESIRED_MODE      158 libavfilter/af_anlms.c     case DESIRED_MODE:  output = desired;       break;