https://github.com/bemasher/fftw

A Go wrapper for 1D full and half complex DFT's provided by the FFTW library.
https://github.com/bemasher/fftw

Last synced: about 2 months ago
JSON representation

A Go wrapper for 1D full and half complex DFT's provided by the FFTW library.

• Host: GitHub
• URL: https://github.com/bemasher/fftw
• Owner: bemasher
• Created: 2014-02-03T18:28:37.000Z (almost 11 years ago)
• Default Branch: master
• Last Pushed: 2014-07-30T11:34:14.000Z (over 10 years ago)
• Last Synced: 2024-04-16T00:15:21.053Z (9 months ago)
• Language: C++
• Size: 295 KB
• Stars: 2
• Watchers: 3
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
## FFTW

This package is a wrapper for 1D full and half complex DFT's provided by the FFTW library. Beware, this package is still under some heavy development and interface is subject to change.

[![Build Status](https://travis-ci.org/bemasher/fftw.svg?branch=master)](https://travis-ci.org/bemasher/fftw)

[![GoDoc](https://godoc.org/github.com/bemasher/fftw?status.png)](https://godoc.org/github.com/bemasher/fftw)

## Example

```Go

package main

import (

	"fmt"

	"github.com/bemasher/fftw"

)

func main() {

	dft := fftw.NewDFT1D(8, fftw.Forward, fftw.OutOfPlace, fftw.Measure)

	defer dft.Close()

	// Modifying the location of the input or output arrays will cause FFTW to

	// fail. Instead, copy data into and out of arrays.

	copy(dft.In, []complex128{1, 1, 1, 1, 0, 0, 0, 0})

	dft.Execute()

	fmt.Println(dft)

	fmt.Printf("%+0.3f\n", dft.In)

	fmt.Printf("%+0.3f\n", dft.Out)

}

```

Output:

```

{Kind:C2C Locality:OutOfPlace PlanFlags:NA In:[8]complex128 Out:[8]complex128}

[(+1.000+0.000i) (+1.000+0.000i) (+1.000+0.000i) (+1.000+0.000i) (+0.000+0.000i) (+0.000+0.000i) (+0.000+0.000i) (+0.000+0.000i)]

[(+4.000+0.000i) (+1.000-2.414i) (+0.000+0.000i) (+1.000-0.414i) (+0.000+0.000i) (+1.000+0.414i) (+0.000+0.000i) (+1.000+2.414i)]

```

## Windows

On Windows the library file `libfftw3.a` must be placed in the source directory of the package and can be generated using:

	

	dlltool -d libfftw3-3.def -D libfftw3-3.dll -l libfftw3.a

## Linux

In Debian flavored distributions installing the `libfftw3-dev` package is all that is required:

	sudo apt-get install libfftw3-dev

## Copyright

The FFTW header file `fftw3.h` carries the following copyright notice:

	Copyright (c) 2003, 2007-11 Matteo Frigo

	Copyright (c) 2003, 2007-11 Massachusetts Institute of Technology

	The following statement of license applies *only* to this header file,

	and *not* to the other files distributed with FFTW or derived therefrom:

	Redistribution and use in source and binary forms, with or without

	modification, are permitted provided that the following conditions

	are met:

	1. Redistributions of source code must retain the above copyright

	notice, this list of conditions and the following disclaimer.

	2. 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.

	THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.