0,0 → 1,86 |
/* |
* 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 header. |
*/ |
|
#ifndef AVCODEC_RL_H |
#define AVCODEC_RL_H |
|
#include <stdint.h> |
#include "get_bits.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 ff_init_rl(RLTable *rl, uint8_t static_store[2][2*MAX_RUN + MAX_LEVEL + 3]); |
void ff_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];\ |
\ |
ff_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 /* AVCODEC_RL_H */ |