mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-30 12:10:37 +00:00
54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
/*
|
|
* 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_FTR_H
|
|
#define KISS_FTR_H
|
|
|
|
#include "kiss_fft_s32.h"
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
/*
|
|
|
|
Real optimized version can save about 45% cpu time vs. complex fft of a real seq.
|
|
|
|
|
|
|
|
*/
|
|
|
|
typedef struct kiss_fftr_s32_state *kiss_fftr_s32_cfg;
|
|
|
|
|
|
kiss_fftr_s32_cfg kiss_fftr_s32_alloc(int nfft,int inverse_fft,void * mem, size_t * lenmem);
|
|
/*
|
|
nfft must be even
|
|
|
|
If you don't care to allocate space, use mem = lenmem = NULL
|
|
*/
|
|
|
|
|
|
void kiss_fftr_s32(kiss_fftr_s32_cfg cfg,const kiss_fft_s32_scalar *timedata,kiss_fft_s32_cpx *freqdata);
|
|
/*
|
|
input timedata has nfft scalar points
|
|
output freqdata has nfft/2+1 complex points
|
|
*/
|
|
|
|
void kiss_fftri_s32(kiss_fftr_s32_cfg cfg,const kiss_fft_s32_cpx *freqdata,kiss_fft_s32_scalar *timedata);
|
|
/*
|
|
input freqdata has nfft/2+1 complex points
|
|
output timedata has nfft scalar points
|
|
*/
|
|
|
|
#define kiss_fftr_s32_free KISS_FFT_S32_FREE
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#endif
|