Libav 0.7.1
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00001 /* 00002 * Copyright (c) 2000-2002 Fabrice Bellard 00003 * Copyright (c) 2002-2004 Michael Niedermayer 00004 * 00005 * This file is part of Libav. 00006 * 00007 * Libav is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * Libav is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with Libav; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00027 #ifndef AVCODEC_RL_H 00028 #define AVCODEC_RL_H 00029 00030 #include <stdint.h> 00031 #include "get_bits.h" 00032 00033 /* run length table */ 00034 #define MAX_RUN 64 00035 #define MAX_LEVEL 64 00036 00038 typedef struct RLTable { 00039 int n; 00040 int last; 00041 const uint16_t (*table_vlc)[2]; 00042 const int8_t *table_run; 00043 const int8_t *table_level; 00044 uint8_t *index_run[2]; 00045 int8_t *max_level[2]; 00046 int8_t *max_run[2]; 00047 VLC vlc; 00048 RL_VLC_ELEM *rl_vlc[32]; 00049 } RLTable; 00050 00056 void init_rl(RLTable *rl, uint8_t static_store[2][2*MAX_RUN + MAX_LEVEL + 3]); 00057 void init_vlc_rl(RLTable *rl); 00058 00059 #define INIT_VLC_RL(rl, static_size)\ 00060 {\ 00061 int q;\ 00062 static RL_VLC_ELEM rl_vlc_table[32][static_size];\ 00063 INIT_VLC_STATIC(&rl.vlc, 9, rl.n + 1,\ 00064 &rl.table_vlc[0][1], 4, 2,\ 00065 &rl.table_vlc[0][0], 4, 2, static_size);\ 00066 \ 00067 if(!rl.rl_vlc[0]){\ 00068 for(q=0; q<32; q++)\ 00069 rl.rl_vlc[q]= rl_vlc_table[q];\ 00070 \ 00071 init_vlc_rl(&rl);\ 00072 }\ 00073 } 00074 00075 static inline int get_rl_index(const RLTable *rl, int last, int run, int level) 00076 { 00077 int index; 00078 index = rl->index_run[last][run]; 00079 if (index >= rl->n) 00080 return rl->n; 00081 if (level > rl->max_level[last][run]) 00082 return rl->n; 00083 return index + level - 1; 00084 } 00085 00086 #endif /* AVCODEC_RL_H */