FFTPACK4 is a C library which computes Fast Fourier Transforms, by Paul Swarztrauber;
Special features include:
Routines in the library come in groups of three:
The following table groups the routines:
Initialization | Forward | Backward | Purpose |
---|---|---|---|
CFFTI | CFFTF | CFFTB | FFT for complex data |
COSQI | COSQF | COSQB | Even function 1D quarter-cosine FFT for real data |
COSTI | COST | COST | Even function 1D cosine FFT for real data |
EZFFTI | EZFFTF | EZFFTB | FFT for real data |
RFFTI | RFFTF | RFFTB | FFT for real data |
SINQI | SINQF | SINQB | Even function 1D quarter-sine FFT for real data |
SINTI | SINT | SINT | Even function 1D sine FFT for real data |
All the changes made by Andrew Fernandes from the original FFTPACK fall under the following BSD-style open-source license:
Copyright (c) 2005, Andrew Fernandes (andrew@fernandes.org); All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. - Neither the name of the North Carolina State University nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
FFTPACK4 is available in a C version.
FFT_OPENMP, a C program which demonstrates the computation of a Fast Fourier Transform (FFT) in parallel, using OpenMP.
FFT_SERIAL, a C program which demonstrates the computation of a Fast Fourier Transform (FFT), and is intended as a starting point for implementing a parallel version.
FFTPACK5, a FORTRAN90 library which implements the Fast Fourier Transform (FFT) by Paul Swarztrauber and Dick Valent;
FFTW3, C programs which illustrate the use of the FFTW3 library for Fast Fourier Transforms (FFT), by Matteo Frigo and Steven Johnson.
SFTPACK, a C library which implements the slow Fourier transform, intended as a teaching tool and comparison with the Fast Fourier Transform (FFT).
The original Fortran77 version of this code was written by Dick Valent and Paul Swarztrauber, of the National Center for Atmospheric Research (NCAR).
The translation to C was done by Andrew Fernandes.
You can go up one level to the C source codes.