ofxFft is an addon for openFrameworks
ofxFft wraps two libraries with the same interface: FFTW and KISS FFT. KISS FFT is MIT licensed, and enabled by default. FFTW is GPL, and can be enabled using the #define USE_FFTW flag.
To use ofxFft with FFTW make sure you download the precompiled libraries.
Basic usage is demonstrated by example-eq and example-basic.
To install ofxFft, move the ofxFft folder to your of/addons/ folder.
With each project, you need to:
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Add to your compiler search path: of/addons/ofxFftw/src/ of/addons/ofxFftw/libs/kiss
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If you're using FFTW on Windows, you'll also need to add: of/libs/fftw/include/ And link with: of/addons/lib/fftw/lib/win32/libfftw3f-3.dll
If you're not using FFTW on Windows, you'll need to remove the line:
#define USE_FFTW
From ofxFft.h
FFTW was compiled with:
./configure --disable-shared --enable-static --enable-float --enable-threads make sudo make install
which puts the static libraries in .libs