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3719602c PC |
1 | /* Copyright (C) 2010-2020 The RetroArch team |
2 | * | |
3 | * --------------------------------------------------------------------------------------- | |
4 | * The following license statement only applies to this file (complex.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 | #ifndef __LIBRETRO_SDK_MATH_COMPLEX_H__ | |
23 | #define __LIBRETRO_SDK_MATH_COMPLEX_H__ | |
24 | ||
25 | #include <stdint.h> | |
26 | ||
27 | #include <retro_inline.h> | |
28 | ||
29 | typedef struct | |
30 | { | |
31 | float real; | |
32 | float imag; | |
33 | } fft_complex_t; | |
34 | ||
35 | static INLINE fft_complex_t fft_complex_mul(fft_complex_t a, | |
36 | fft_complex_t b) | |
37 | { | |
38 | fft_complex_t out; | |
39 | out.real = a.real * b.real - a.imag * b.imag; | |
40 | out.imag = a.imag * b.real + a.real * b.imag; | |
41 | ||
42 | return out; | |
43 | ||
44 | } | |
45 | ||
46 | static INLINE fft_complex_t fft_complex_add(fft_complex_t a, | |
47 | fft_complex_t b) | |
48 | { | |
49 | fft_complex_t out; | |
50 | out.real = a.real + b.real; | |
51 | out.imag = a.imag + b.imag; | |
52 | ||
53 | return out; | |
54 | ||
55 | } | |
56 | ||
57 | static INLINE fft_complex_t fft_complex_sub(fft_complex_t a, | |
58 | fft_complex_t b) | |
59 | { | |
60 | fft_complex_t out; | |
61 | out.real = a.real - b.real; | |
62 | out.imag = a.imag - b.imag; | |
63 | ||
64 | return out; | |
65 | ||
66 | } | |
67 | ||
68 | static INLINE fft_complex_t fft_complex_conj(fft_complex_t a) | |
69 | { | |
70 | fft_complex_t out; | |
71 | out.real = a.real; | |
72 | out.imag = -a.imag; | |
73 | ||
74 | return out; | |
75 | } | |
76 | ||
77 | #endif |