XCORE SDK
XCORE Software Development Kit
fft.h
1 /*
2  * Free FFT and convolution (C)
3  *
4  * Copyright (c) 2018 Project Nayuki. (MIT License)
5  * https://www.nayuki.io/page/free-small-fft-in-multiple-languages
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining a copy of
8  * this software and associated documentation files (the "Software"), to deal in
9  * the Software without restriction, including without limitation the rights to
10  * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
11  * the Software, and to permit persons to whom the Software is furnished to do so,
12  * subject to the following conditions:
13  * - The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  * - The Software is provided "as is", without warranty of any kind, express or
16  * implied, including but not limited to the warranties of merchantability,
17  * fitness for a particular purpose and noninfringement. In no event shall the
18  * authors or copyright holders be liable for any claim, damages or other
19  * liability, 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
21  * Software.
22  */
23 
24 #include <stdbool.h>
25 #include <stddef.h>
26 
27 
28 /*
29  * Computes the discrete Fourier transform (DFT) of the given complex vector, storing the result back into the vector.
30  * The vector can have any length. This is a wrapper function. Returns true if successful, false otherwise (out of memory).
31  */
32 int Fft_transform(double real[], double imag[], size_t n);
33 
34 
35 /*
36  * Computes the inverse discrete Fourier transform (IDFT) of the given complex vector, storing the result back into the vector.
37  * The vector can have any length. This is a wrapper function.
38  * Returns true if successful, false otherwise (out of memory).
39  */
40 int Fft_inverseTransform(double real[], double imag[], size_t n);
41