so that af_fmt_to_planar (and hence af_fmt_from_planar) can just
return the input when it is not an interleaved (planar) format.
(cherry picked from commit f2311ff514)
so that af_fmt_to_planar (and hence af_fmt_from_planar) can just
return the input when it is not an interleaved (planar) format.
(cherry picked from commit f2311ff514)