ointer for both the input and output arguments.  (Previously, the
output <code>ostride</code> and <code>odist</code> parameters were ignored for
in-place transforms; now, if they are specified via the advanced
interface, they are significant even in the in-place case, although they
should normally equal the corresponding input parameters.)
</p>
<p>The <code>FFTW_ESTIMATE</code> and <code>FFTW_MEASURE</code> flags have the same
meaning as before, although the planning time will differ.  You may also
consider