mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
63 lines
2.2 KiB
C
63 lines
2.2 KiB
C
/*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef AVCODEC_FFT_INTERNAL_H
|
|
#define AVCODEC_FFT_INTERNAL_H
|
|
|
|
#include "libavutil/mathematics.h"
|
|
#include "fft.h"
|
|
|
|
#if FFT_FLOAT
|
|
|
|
#define FIX15(v) (v)
|
|
#define sqrthalf (float)M_SQRT1_2
|
|
|
|
#define BF(x, y, a, b) do { \
|
|
x = a - b; \
|
|
y = a + b; \
|
|
} while (0)
|
|
|
|
#define CMUL(dre, dim, are, aim, bre, bim) do { \
|
|
(dre) = (are) * (bre) - (aim) * (bim); \
|
|
(dim) = (are) * (bim) + (aim) * (bre); \
|
|
} while (0)
|
|
|
|
#else /* FFT_FLOAT */
|
|
|
|
#define CMUL(dre, dim, are, aim, bre, bim) do { \
|
|
int64_t accu; \
|
|
(accu) = (int64_t)(bre) * (are); \
|
|
(accu) -= (int64_t)(bim) * (aim); \
|
|
(dre) = (int)(((accu) + 0x40000000) >> 31); \
|
|
(accu) = (int64_t)(bre) * (aim); \
|
|
(accu) += (int64_t)(bim) * (are); \
|
|
(dim) = (int)(((accu) + 0x40000000) >> 31); \
|
|
} while (0)
|
|
|
|
#endif /* FFT_FLOAT */
|
|
|
|
#define ff_imdct_calc_c FFT_NAME(ff_imdct_calc_c)
|
|
#define ff_imdct_half_c FFT_NAME(ff_imdct_half_c)
|
|
#define ff_mdct_calc_c FFT_NAME(ff_mdct_calc_c)
|
|
|
|
void ff_imdct_calc_c(FFTContext *s, FFTSample *output, const FFTSample *input);
|
|
void ff_imdct_half_c(FFTContext *s, FFTSample *output, const FFTSample *input);
|
|
void ff_mdct_calc_c(FFTContext *s, FFTSample *output, const FFTSample *input);
|
|
|
|
#endif /* AVCODEC_FFT_INTERNAL_H */
|