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/*
***************************************************************************
*
* Author: Teunis van Beelen
*
* Copyright (C) 2018 - 2021 Teunis van Beelen
*
* Email: teuniz@protonmail.com
*
***************************************************************************
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
***************************************************************************
*/
#ifndef fft_wrap_INCLUDED
#define fft_wrap_INCLUDED
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "third_party/kiss_fft/kiss_fftr.h"
#define FFT_WNDW_TYPE_RECT (0)
#define FFT_WNDW_TYPE_HAMMING (1)
#define FFT_WNDW_TYPE_4TERM_BLACKMANHARRIS (2)
#define FFT_WNDW_TYPE_7TERM_BLACKMANHARRIS (3)
#define FFT_WNDW_TYPE_NUTTALL3B (4)
#define FFT_WNDW_TYPE_NUTTALL4C (5)
#define FFT_WNDW_TYPE_HANN (6)
#define FFT_WNDW_TYPE_HFT223D (7)
#define FFT_WNDW_TYPE_HFT95 (8)
#define FFT_WNDW_TYPE_KAISER_A2 (9)
#define FFT_WNDW_TYPE_KAISER_A3 (10)
#define FFT_WNDW_TYPE_KAISER_A4 (11)
#define FFT_WNDW_TYPE_KAISER_A5 (12)
#ifdef __cplusplus
extern "C" {
#endif
struct fft_wrap_settings_struct{
int sz_in;
int dft_sz;
int sz_out;
int blocks;
int smpls_left;
int wndw_type;
int overlap;
int blocks_processed;
double *buf_in;
double *buf_wndw;
double *buf_wndw_coef;
double *buf_out;
kiss_fftr_cfg cfg;
kiss_fft_cpx *kiss_fftbuf;
};
struct fft_wrap_settings_struct * fft_wrap_create(double *, int, int, int, int);
void fft_wrap_run(struct fft_wrap_settings_struct *);
void free_fft_wrap(struct fft_wrap_settings_struct *);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif
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