mirror of
https://github.com/libretro/libretro-common.git
synced 2024-06-16 03:08:13 -04:00
78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
/* Copyright (C) 2010-2020 The RetroArch team
|
|
*
|
|
* ---------------------------------------------------------------------------------------
|
|
* The following license statement only applies to this file (complex.h).
|
|
* ---------------------------------------------------------------------------------------
|
|
*
|
|
* Permission is hereby granted, free of charge,
|
|
* to any person obtaining a copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation the rights to
|
|
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
|
|
* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
|
|
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
|
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
|
|
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
#ifndef __LIBRETRO_SDK_MATH_COMPLEX_H__
|
|
#define __LIBRETRO_SDK_MATH_COMPLEX_H__
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <retro_inline.h>
|
|
|
|
typedef struct
|
|
{
|
|
float real;
|
|
float imag;
|
|
} fft_complex_t;
|
|
|
|
static INLINE fft_complex_t fft_complex_mul(fft_complex_t a,
|
|
fft_complex_t b)
|
|
{
|
|
fft_complex_t out;
|
|
out.real = a.real * b.real - a.imag * b.imag;
|
|
out.imag = a.imag * b.real + a.real * b.imag;
|
|
|
|
return out;
|
|
|
|
}
|
|
|
|
static INLINE fft_complex_t fft_complex_add(fft_complex_t a,
|
|
fft_complex_t b)
|
|
{
|
|
fft_complex_t out;
|
|
out.real = a.real + b.real;
|
|
out.imag = a.imag + b.imag;
|
|
|
|
return out;
|
|
|
|
}
|
|
|
|
static INLINE fft_complex_t fft_complex_sub(fft_complex_t a,
|
|
fft_complex_t b)
|
|
{
|
|
fft_complex_t out;
|
|
out.real = a.real - b.real;
|
|
out.imag = a.imag - b.imag;
|
|
|
|
return out;
|
|
|
|
}
|
|
|
|
static INLINE fft_complex_t fft_complex_conj(fft_complex_t a)
|
|
{
|
|
fft_complex_t out;
|
|
out.real = a.real;
|
|
out.imag = -a.imag;
|
|
|
|
return out;
|
|
}
|
|
|
|
#endif
|