kiss_fftndr.h

Go to the documentation of this file.

/*
 *  Copyright (c) 2003-2004, Mark Borgerding. All rights reserved.
 *  This file is part of KISS FFT - https://github.com/mborgerding/kissfft
 *
 *  SPDX-License-Identifier: BSD-3-Clause
 *  See COPYING file for more information.
 */
 
#ifndef KISS_NDR_H
#define KISS_NDR_H
 
#include "kiss_fft.h"
#include "kiss_fftr.h"
#include "kiss_fftnd.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef struct kiss_fftndr_state* kiss_fftndr_cfg;
 
kiss_fftndr_cfg KISS_FFT_API kiss_fftndr_alloc(const int* dims, int ndims,
                                               int inverse_fft, void* mem,
                                               size_t* lenmem);
/*
 dims[0] must be even
 
 If you don't care to allocate space, use mem = lenmem = NULL
*/
 
void KISS_FFT_API kiss_fftndr(kiss_fftndr_cfg cfg, const kiss_fft_scalar* timedata,
                              kiss_fft_cpx* freqdata);
/*
 input timedata has dims[0] X dims[1] X ... X  dims[ndims-1] scalar points
 output freqdata has dims[0] X dims[1] X ... X  dims[ndims-1]/2+1 complex points
*/
 
void KISS_FFT_API kiss_fftndri(kiss_fftndr_cfg cfg, const kiss_fft_cpx* freqdata,
                               kiss_fft_scalar* timedata);
/*
 input and output dimensions are the exact opposite of kiss_fftndr
*/
 
#define kiss_fftndr_free free
 
#ifdef __cplusplus
}
#endif
 
#endif