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.
90 lines
3.8 KiB
90 lines
3.8 KiB
/* |
|
* 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_VLC_H |
|
#define AVCODEC_VLC_H |
|
|
|
#include <stdint.h> |
|
|
|
#define VLC_TYPE int16_t |
|
|
|
typedef struct VLC { |
|
int bits; |
|
VLC_TYPE (*table)[2]; ///< code, bits |
|
int table_size, table_allocated; |
|
} VLC; |
|
|
|
typedef struct RL_VLC_ELEM { |
|
int16_t level; |
|
int8_t len; |
|
uint8_t run; |
|
} RL_VLC_ELEM; |
|
|
|
#define init_vlc(vlc, nb_bits, nb_codes, \ |
|
bits, bits_wrap, bits_size, \ |
|
codes, codes_wrap, codes_size, \ |
|
flags) \ |
|
ff_init_vlc_sparse(vlc, nb_bits, nb_codes, \ |
|
bits, bits_wrap, bits_size, \ |
|
codes, codes_wrap, codes_size, \ |
|
NULL, 0, 0, flags) |
|
|
|
int ff_init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes, |
|
const void *bits, int bits_wrap, int bits_size, |
|
const void *codes, int codes_wrap, int codes_size, |
|
const void *symbols, int symbols_wrap, int symbols_size, |
|
int flags); |
|
void ff_free_vlc(VLC *vlc); |
|
|
|
/* If INIT_VLC_INPUT_LE is set, the LSB bit of the codes used to |
|
* initialize the VLC table is the first bit to be read. */ |
|
#define INIT_VLC_INPUT_LE 2 |
|
/* If set the VLC is intended for a little endian bitstream reader. */ |
|
#define INIT_VLC_OUTPUT_LE 8 |
|
#define INIT_VLC_LE (INIT_VLC_INPUT_LE | INIT_VLC_OUTPUT_LE) |
|
#define INIT_VLC_USE_NEW_STATIC 4 |
|
|
|
#define INIT_CUSTOM_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, \ |
|
h, i, j, flags, static_size) \ |
|
do { \ |
|
static VLC_TYPE table[static_size][2]; \ |
|
(vlc)->table = table; \ |
|
(vlc)->table_allocated = static_size; \ |
|
ff_init_vlc_sparse(vlc, bits, a, b, c, d, e, f, g, h, i, j, \ |
|
flags | INIT_VLC_USE_NEW_STATIC); \ |
|
} while (0) |
|
|
|
#define INIT_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, h, i, j, static_size) \ |
|
INIT_CUSTOM_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, \ |
|
h, i, j, 0, static_size) |
|
|
|
#define INIT_LE_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, h, i, j, static_size) \ |
|
INIT_CUSTOM_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, \ |
|
h, i, j, INIT_VLC_LE, static_size) |
|
|
|
#define INIT_CUSTOM_VLC_STATIC(vlc, bits, a, b, c, d, e, f, g, flags, static_size) \ |
|
INIT_CUSTOM_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, \ |
|
NULL, 0, 0, flags, static_size) |
|
|
|
#define INIT_VLC_STATIC(vlc, bits, a, b, c, d, e, f, g, static_size) \ |
|
INIT_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, NULL, 0, 0, static_size) |
|
|
|
#define INIT_LE_VLC_STATIC(vlc, bits, a, b, c, d, e, f, g, static_size) \ |
|
INIT_LE_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, NULL, 0, 0, static_size) |
|
|
|
#endif /* AVCODEC_VLC_H */
|
|
|