METADATAF_EXPR    112 libavfilter/f_metadata.c     {   "expr",        NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_EXPR    },     0, 3, FLAGS, "function" }, \
METADATAF_EXPR    240 libavfilter/f_metadata.c     case METADATAF_EXPR:
METADATAF_EXPR    247 libavfilter/f_metadata.c     if (s->function == METADATAF_EXPR) {