fftw3

library3.3.10vcpkgunverified

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).

other

vcpkg install fftw3

INSTALL

IMPORT

SIG · FFTW3

fftw3

othercppv3.3.10

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

fftw3.h

✓ #include <fftw3.h>

Computes a 1D real-to-complex FFT.

#include <fftw3.h> #include <cmath> #include <iostream> int main() { int n = 8; double *in = (double*) fftw_malloc(sizeof(double) * n); fftw_complex *out = (fftw_complex*) fftw_malloc(sizeof(fftw_complex) * n); fftw_plan p = fftw_plan_dft_r2c_1d(n, in, out, FFTW_ESTIMATE); for (int i = 0; i < n; i++) in[i] = sin(2 * M_PI * i / n); fftw_execute(p); std::cout << "FFT computed." << std::endl; fftw_destroy_plan(p); fftw_free(in); fftw_free(out); return 0; }

Debug

Known issues

gotchaFFTW uses its own memory allocation functions (fftw_malloc) for proper alignment; using standard malloc may cause crashes on SIMD-enabled builds.

fix

Always use fftw_malloc for arrays passed to FFTW plans.

affects: *

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Version history

3.3.10latest on vcpkg

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Dependencies

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Agent activity

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