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/*
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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 Libav.
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 *
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 * Libav 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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 * Libav 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 Libav; 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
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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 "get_bits.h"
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/* run length table */
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#define MAX_RUN    64
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#define MAX_LEVEL  64
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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);
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#define INIT_VLC_RL(rl, static_size)\
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{\
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    int q;\
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    static RL_VLC_ELEM rl_vlc_table[32][static_size];\
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    INIT_VLC_STATIC(&rl.vlc, 9, rl.n + 1,\
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             &rl.table_vlc[0][1], 4, 2,\
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             &rl.table_vlc[0][0], 4, 2, static_size);\
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\
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    if(!rl.rl_vlc[0]){\
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        for(q=0; q<32; q++)\
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            rl.rl_vlc[q]= rl_vlc_table[q];\
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\
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        init_vlc_rl(&rl);\
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    }\
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}
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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 /* AVCODEC_RL_H */