mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-20 22:41:11 +00:00
58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
/*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef AVCODEC_IMDCT15_H
|
|
#define AVCODEC_IMDCT15_H
|
|
|
|
#include <stddef.h>
|
|
|
|
#include "avfft.h"
|
|
|
|
typedef struct IMDCT15Context {
|
|
int fft_n;
|
|
int len2;
|
|
int len4;
|
|
|
|
FFTComplex *tmp;
|
|
|
|
FFTComplex *twiddle_exptab;
|
|
|
|
FFTComplex *exptab[6];
|
|
|
|
/**
|
|
* Calculate the middle half of the iMDCT
|
|
*/
|
|
void (*imdct_half)(struct IMDCT15Context *s, float *dst, const float *src,
|
|
ptrdiff_t src_stride, float scale);
|
|
} IMDCT15Context;
|
|
|
|
/**
|
|
* Init an iMDCT of the length 2 * 15 * (2^N)
|
|
*/
|
|
int ff_imdct15_init(IMDCT15Context **s, int N);
|
|
|
|
/**
|
|
* Free an iMDCT.
|
|
*/
|
|
void ff_imdct15_uninit(IMDCT15Context **s);
|
|
|
|
|
|
void ff_imdct15_init_aarch64(IMDCT15Context *s);
|
|
|
|
#endif /* AVCODEC_IMDCT15_H */
|