yading@10: /*
yading@10:  * Copyright (c) 2000-2002 Fabrice Bellard
yading@10:  * Copyright (c) 2002-2004 Michael Niedermayer
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * rl header.
yading@10:  */
yading@10: 
yading@10: #ifndef AVCODEC_RL_H
yading@10: #define AVCODEC_RL_H
yading@10: 
yading@10: #include <stdint.h>
yading@10: #include "get_bits.h"
yading@10: 
yading@10: /* run length table */
yading@10: #define MAX_RUN    64
yading@10: #define MAX_LEVEL  64
yading@10: 
yading@10: /** RLTable. */
yading@10: typedef struct RLTable {
yading@10:     int n;                         ///< number of entries of table_vlc minus 1
yading@10:     int last;                      ///< number of values for last = 0
yading@10:     const uint16_t (*table_vlc)[2];
yading@10:     const int8_t *table_run;
yading@10:     const int8_t *table_level;
yading@10:     uint8_t *index_run[2];         ///< encoding only
yading@10:     int8_t *max_level[2];          ///< encoding & decoding
yading@10:     int8_t *max_run[2];            ///< encoding & decoding
yading@10:     VLC vlc;                       ///< decoding only deprecated FIXME remove
yading@10:     RL_VLC_ELEM *rl_vlc[32];       ///< decoding only
yading@10: } RLTable;
yading@10: 
yading@10: /**
yading@10:  *
yading@10:  * @param static_store static uint8_t array[2][2*MAX_RUN + MAX_LEVEL + 3] which will hold
yading@10:  *                     the level and run tables, if this is NULL av_malloc() will be used
yading@10:  */
yading@10: void ff_init_rl(RLTable *rl, uint8_t static_store[2][2*MAX_RUN + MAX_LEVEL + 3]);
yading@10: void ff_init_vlc_rl(RLTable *rl);
yading@10: 
yading@10: #define INIT_VLC_RL(rl, static_size)\
yading@10: {\
yading@10:     int q;\
yading@10:     static RL_VLC_ELEM rl_vlc_table[32][static_size];\
yading@10:     INIT_VLC_STATIC(&rl.vlc, 9, rl.n + 1,\
yading@10:              &rl.table_vlc[0][1], 4, 2,\
yading@10:              &rl.table_vlc[0][0], 4, 2, static_size);\
yading@10: \
yading@10:     if(!rl.rl_vlc[0]){\
yading@10:         for(q=0; q<32; q++)\
yading@10:             rl.rl_vlc[q]= rl_vlc_table[q];\
yading@10: \
yading@10:         ff_init_vlc_rl(&rl);\
yading@10:     }\
yading@10: }
yading@10: 
yading@10: static inline int get_rl_index(const RLTable *rl, int last, int run, int level)
yading@10: {
yading@10:     int index;
yading@10:     index = rl->index_run[last][run];
yading@10:     if (index >= rl->n)
yading@10:         return rl->n;
yading@10:     if (level > rl->max_level[last][run])
yading@10:         return rl->n;
yading@10:     return index + level - 1;
yading@10: }
yading@10: 
yading@10: #endif /* AVCODEC_RL_H */