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.
54 lines
1.7 KiB
54 lines
1.7 KiB
/* |
|
* AAC definitions and structures |
|
* Copyright (c) 2024 Lynne |
|
* |
|
* 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_AAC_AACDEC_AC_H |
|
#define AVCODEC_AAC_AACDEC_AC_H |
|
|
|
#include "libavcodec/get_bits.h" |
|
|
|
typedef struct AACArithState { |
|
uint8_t last[512 /* 2048 / 4 */ + 1]; |
|
int last_len; |
|
uint8_t cur[4]; |
|
uint16_t state_pre; |
|
} AACArithState; |
|
|
|
typedef struct AACArith { |
|
uint16_t low; |
|
uint16_t high; |
|
uint16_t val; |
|
} AACArith; |
|
|
|
#define FF_AAC_AC_ESCAPE 16 |
|
|
|
uint32_t ff_aac_ac_map_process(AACArithState *state, int reset, int len); |
|
uint32_t ff_aac_ac_get_context(AACArithState *state, uint32_t old_c, int idx, int len); |
|
uint32_t ff_aac_ac_get_pk(uint32_t c); |
|
|
|
void ff_aac_ac_update_context(AACArithState *state, int idx, uint16_t a, uint16_t b); |
|
void ff_aac_ac_init(AACArith *ac, GetBitContext *gb); |
|
|
|
uint16_t ff_aac_ac_decode(AACArith *ac, GetBitContext *gb, |
|
const uint16_t *cdf, uint16_t cdf_len); |
|
|
|
void ff_aac_ac_finish(AACArithState *state, int offset, int nb); |
|
|
|
#endif /* AVCODEC_AACDEC_AC_H */
|
|
|