mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
1.5 KiB
53 lines
1.5 KiB
/* |
|
* H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder |
|
* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> |
|
* |
|
* 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 |
|
*/ |
|
|
|
/** |
|
* @file |
|
* Context Adaptive Binary Arithmetic Coder. |
|
*/ |
|
|
|
#ifndef AVCODEC_CABAC_H |
|
#define AVCODEC_CABAC_H |
|
|
|
#include <stdint.h> |
|
|
|
#include "put_bits.h" |
|
|
|
#define H264_NORM_SHIFT_OFFSET 0 |
|
#define H264_LPS_RANGE_OFFSET 512 |
|
#define H264_MLPS_STATE_OFFSET 1024 |
|
#define H264_LAST_COEFF_FLAG_OFFSET_8x8_OFFSET 1280 |
|
|
|
#define CABAC_BITS 16 |
|
#define CABAC_MASK ((1<<CABAC_BITS)-1) |
|
|
|
typedef struct CABACContext{ |
|
int low; |
|
int range; |
|
const uint8_t *bytestream_start; |
|
const uint8_t *bytestream; |
|
const uint8_t *bytestream_end; |
|
}CABACContext; |
|
|
|
void ff_init_cabac_decoder(CABACContext *c, const uint8_t *buf, int buf_size); |
|
void ff_init_cabac_states(void); |
|
|
|
#endif /* AVCODEC_CABAC_H */
|
|
|