Function fftwf_plan_r2r_2d

pub unsafe extern "C" fn fftwf_plan_r2r_2d(
    n0: c_int,
    n1: c_int,
    in_: *mut f32,
    out: *mut f32,
    kind0: fftwf_r2r_kind,
    kind1: fftwf_r2r_kind,
    flags: c_uint,
) -> fftwf_plan