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