FFTW is a C subroutine library for computing the discrete Fourier transform
(DFT) in one or more dimensions, of arbitrary input size, and of both real
and complex data (as well as of even/odd data, i.e. the discrete cosine/sine
transforms or DCT/DST).

This package contains the quad precision floating point FFTW libraries.

Homepage:
http://www.fftw.org/
