num::spectral::fft_plan

Defined in header <spectral/fft.hpp>

class fft_plan;

Precomputed 1D complex FFT execution plan for repeated transforms.

Pre-allocates twiddle factors, trigonometric lookup tables, or FFTW plans to amortize setup costs across multiple transforms of identical length.

Members

member	description
explicit fft_plan(int n, bool forward = true, fft_backend b = default_fft_backend)	Precompute an \(n\)-point forward or inverse complex transform plan.
fft_plan(fft_plan &&) noexcept
fft_plan &operator=(fft_plan &&) noexcept
void execute(const vec<cplx> &in, vec<cplx> &out) const	Execute planned transform on input buffer.
int size() const
fft_backend backend() const