mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-26 01:02:33 +00:00
65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
/*
|
|
* Copyright (c) 2017 Rostislav Pehlivanov <atomnuker@gmail.com>
|
|
*
|
|
* 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_MDCT15_H
|
|
#define AVCODEC_MDCT15_H
|
|
|
|
#include <stddef.h>
|
|
|
|
#include "libavutil/mem_internal.h"
|
|
|
|
#include "fft.h"
|
|
|
|
typedef struct MDCT15Context {
|
|
int fft_n;
|
|
int len2;
|
|
int len4;
|
|
int inverse;
|
|
int *pfa_prereindex;
|
|
int *pfa_postreindex;
|
|
|
|
FFTContext ptwo_fft;
|
|
FFTComplex *tmp;
|
|
FFTComplex *twiddle_exptab;
|
|
|
|
DECLARE_ALIGNED(32, FFTComplex, exptab)[64];
|
|
|
|
/* 15-point FFT */
|
|
void (*fft15)(FFTComplex *out, FFTComplex *in, FFTComplex *exptab, ptrdiff_t stride);
|
|
|
|
/* PFA postrotate and exptab */
|
|
void (*postreindex)(FFTComplex *out, FFTComplex *in, FFTComplex *exp, int *lut, ptrdiff_t len8);
|
|
|
|
/* Calculate a full 2N -> N MDCT */
|
|
void (*mdct)(struct MDCT15Context *s, float *dst, const float *src, ptrdiff_t stride);
|
|
|
|
/* Calculate the middle half of the iMDCT */
|
|
void (*imdct_half)(struct MDCT15Context *s, float *dst, const float *src,
|
|
ptrdiff_t stride);
|
|
} MDCT15Context;
|
|
|
|
/* Init an (i)MDCT of the length 2 * 15 * (2^N) */
|
|
int ff_mdct15_init(MDCT15Context **ps, int inverse, int N, double scale);
|
|
void ff_mdct15_uninit(MDCT15Context **ps);
|
|
|
|
void ff_mdct15_init_x86(MDCT15Context *s);
|
|
|
|
#endif /* AVCODEC_MDCT15_H */
|