FIELD_TYPE_TOP     44 libavfilter/vf_field.c     {"type", "set field type (top or bottom)", OFFSET(type), AV_OPT_TYPE_INT, {.i64=FIELD_TYPE_TOP}, 0, 1, FLAGS, "field_type" },
FIELD_TYPE_TOP     45 libavfilter/vf_field.c     {"top",    "select top field",    0, AV_OPT_TYPE_CONST, {.i64=FIELD_TYPE_TOP},    INT_MIN, INT_MAX, FLAGS, "field_type"},
FIELD_TYPE_TOP     61 libavfilter/vf_field.c     outlink->h = (inlink->h + (field->type == FIELD_TYPE_TOP)) / 2;