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