Precomputed plan for repeated complex transforms of a fixed size. More...

#include <fft.hpp>

Public Member Functions
	FFTPlan (int n, bool forward=true, FFTBackend b=default_fft_backend)

	~FFTPlan ()

	FFTPlan (const FFTPlan &)=delete

FFTPlan &	operator= (const FFTPlan &)=delete

void	execute (const CVector &in, CVector &out) const

int	size () const

FFTBackend	backend () const

Detailed Description

Precomputed plan for repeated complex transforms of a fixed size.

num::spectral::FFTPlan plan(1024);          // forward, default backend
for (auto& frame : frames)
    plan.execute(frame, spectrum);           // O(n log n), no allocation

Definition at line 102 of file fft.hpp.

Constructor & Destructor Documentation

◆ FFTPlan() [1/2]

num::spectral::FFTPlan::FFTPlan	(	int	n,
		bool	forward = `true`,
		FFTBackend	b = `default_fft_backend`
	)

explicit

Parameters

n	Transform size (must be power of two for FFTBackend::seq)
forward	true = forward DFT, false = inverse DFT
b	Backend to use (default: default_fft_backend)

Definition at line 80 of file fft.cpp.

References num::spectral::fftw, num::ipow(), num::spectral::simd, and num::spectral::stdsimd.

◆ ~FFTPlan()

num::spectral::FFTPlan::~FFTPlan ( )

Definition at line 102 of file fft.cpp.

References num::spectral::fftw, num::spectral::simd, and num::spectral::stdsimd.

◆ FFTPlan() [2/2]

num::spectral::FFTPlan::FFTPlan ( const FFTPlan & )

delete

Member Function Documentation

◆ backend()

FFTBackend num::spectral::FFTPlan::backend ( ) const

inline

Definition at line 117 of file fft.hpp.

◆ execute()

void num::spectral::FFTPlan::execute	(	const CVector &	in,
		CVector &	out
	)		const

Definition at line 124 of file fft.cpp.

References execute(), num::spectral::fftw, num::ipow(), num::spectral::simd, and num::spectral::stdsimd.

Referenced by execute().

◆ operator=()

FFTPlan & num::spectral::FFTPlan::operator= ( const FFTPlan & )