mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-22 23:33:07 +00:00
87 lines
2.6 KiB
C
87 lines
2.6 KiB
C
/*
|
|
* Copyright (c) 2000-2002 Fabrice Bellard
|
|
* Copyright (c) 2002-2004 Michael Niedermayer
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file rl.h
|
|
* rl header.
|
|
*/
|
|
|
|
#ifndef FFMPEG_RL_H
|
|
#define FFMPEG_RL_H
|
|
|
|
#include <stdint.h>
|
|
#include "bitstream.h"
|
|
|
|
/* run length table */
|
|
#define MAX_RUN 64
|
|
#define MAX_LEVEL 64
|
|
|
|
/** RLTable. */
|
|
typedef struct RLTable {
|
|
int n; ///< number of entries of table_vlc minus 1
|
|
int last; ///< number of values for last = 0
|
|
const uint16_t (*table_vlc)[2];
|
|
const int8_t *table_run;
|
|
const int8_t *table_level;
|
|
uint8_t *index_run[2]; ///< encoding only
|
|
int8_t *max_level[2]; ///< encoding & decoding
|
|
int8_t *max_run[2]; ///< encoding & decoding
|
|
VLC vlc; ///< decoding only deprecated FIXME remove
|
|
RL_VLC_ELEM *rl_vlc[32]; ///< decoding only
|
|
} RLTable;
|
|
|
|
/**
|
|
*
|
|
* @param static_store static uint8_t array[2][2*MAX_RUN + MAX_LEVEL + 3] which will hold
|
|
* the level and run tables, if this is NULL av_malloc() will be used
|
|
*/
|
|
void init_rl(RLTable *rl, uint8_t static_store[2][2*MAX_RUN + MAX_LEVEL + 3]);
|
|
void init_vlc_rl(RLTable *rl);
|
|
|
|
#define INIT_VLC_RL(rl, static_size)\
|
|
{\
|
|
int q;\
|
|
static RL_VLC_ELEM rl_vlc_table[32][static_size];\
|
|
INIT_VLC_STATIC(&rl.vlc, 9, rl.n + 1,\
|
|
&rl.table_vlc[0][1], 4, 2,\
|
|
&rl.table_vlc[0][0], 4, 2, static_size);\
|
|
\
|
|
if(!rl.rl_vlc[0]){\
|
|
for(q=0; q<32; q++)\
|
|
rl.rl_vlc[q]= rl_vlc_table[q];\
|
|
\
|
|
init_vlc_rl(&rl);\
|
|
}\
|
|
}
|
|
|
|
static inline int get_rl_index(const RLTable *rl, int last, int run, int level)
|
|
{
|
|
int index;
|
|
index = rl->index_run[last][run];
|
|
if (index >= rl->n)
|
|
return rl->n;
|
|
if (level > rl->max_level[last][run])
|
|
return rl->n;
|
|
return index + level - 1;
|
|
}
|
|
|
|
#endif /* FFMPEG_RL_H */
|