1 /* Copyright  (C) 2010-2020 The RetroArch team
2  *
3  * ---------------------------------------------------------------------------------------
4  * The following license statement only applies to this file (fft.h).
5  * ---------------------------------------------------------------------------------------
6  *
7  * Permission is hereby granted, free of charge,
8  * to any person obtaining a copy of this software and associated documentation files (the "Software"),
9  * to deal in the Software without restriction, including without limitation the rights to
10  * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
11  * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
16  * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
18  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
19  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
21  */
22 
23 #ifndef RARCH_FFT_H__
24 #define RARCH_FFT_H__
25 
26 #include <retro_inline.h>
27 #include <math/complex.h>
28 
29 typedef struct fft fft_t;
30 
31 fft_t *fft_new(unsigned block_size_log2);
32 
33 void fft_free(fft_t *fft);
34 
35 void fft_process_forward_complex(fft_t *fft,
36       fft_complex_t *out, const fft_complex_t *in, unsigned step);
37 
38 void fft_process_forward(fft_t *fft,
39       fft_complex_t *out, const float *in, unsigned step);
40 
41 void fft_process_inverse(fft_t *fft,
42       float *out, const fft_complex_t *in, unsigned step);
43 
44 #endif
45