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| Rev | Author | Line No. | Line |
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| 6148 | serge | 1 | /* |
| 2 | * Copyright (c) 2000-2002 Fabrice Bellard |
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| 3 | * Copyright (c) 2002-2004 Michael Niedermayer |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | /** |
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| 23 | * @file |
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| 24 | * rl header. |
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| 25 | */ |
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| 26 | |||
| 27 | #ifndef AVCODEC_RL_H |
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| 28 | #define AVCODEC_RL_H |
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| 29 | |||
| 30 | #include |
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| 31 | #include "get_bits.h" |
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| 32 | |||
| 33 | /* run length table */ |
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| 34 | #define MAX_RUN 64 |
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| 35 | #define MAX_LEVEL 64 |
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| 36 | |||
| 37 | /** RLTable. */ |
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| 38 | typedef struct RLTable { |
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| 39 | int n; ///< number of entries of table_vlc minus 1 |
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| 40 | int last; ///< number of values for last = 0 |
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| 41 | const uint16_t (*table_vlc)[2]; |
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| 42 | const int8_t *table_run; |
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| 43 | const int8_t *table_level; |
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| 44 | uint8_t *index_run[2]; ///< encoding only |
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| 45 | int8_t *max_level[2]; ///< encoding & decoding |
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| 46 | int8_t *max_run[2]; ///< encoding & decoding |
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| 47 | VLC vlc; ///< decoding only deprecated FIXME remove |
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| 48 | RL_VLC_ELEM *rl_vlc[32]; ///< decoding only |
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| 49 | } RLTable; |
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| 50 | |||
| 51 | /** |
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| 52 | * |
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| 53 | * @param static_store static uint8_t array[2][2*MAX_RUN + MAX_LEVEL + 3] which will hold |
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| 54 | * the level and run tables, if this is NULL av_malloc() will be used |
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| 55 | */ |
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| 56 | void ff_init_rl(RLTable *rl, uint8_t static_store[2][2*MAX_RUN + MAX_LEVEL + 3]); |
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| 57 | void ff_init_vlc_rl(RLTable *rl); |
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| 58 | |||
| 59 | #define INIT_VLC_RL(rl, static_size)\ |
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| 60 | {\ |
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| 61 | int q;\ |
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| 62 | static RL_VLC_ELEM rl_vlc_table[32][static_size];\ |
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| 63 | INIT_VLC_STATIC(&rl.vlc, 9, rl.n + 1,\ |
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| 64 | &rl.table_vlc[0][1], 4, 2,\ |
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| 65 | &rl.table_vlc[0][0], 4, 2, static_size);\ |
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| 66 | \ |
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| 67 | if(!rl.rl_vlc[0]){\ |
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| 68 | for(q=0; q<32; q++)\ |
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| 69 | rl.rl_vlc[q]= rl_vlc_table[q];\ |
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| 70 | \ |
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| 71 | ff_init_vlc_rl(&rl);\ |
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| 72 | }\ |
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| 73 | } |
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| 74 | |||
| 75 | static inline int get_rl_index(const RLTable *rl, int last, int run, int level) |
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| 76 | { |
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| 77 | int index; |
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| 78 | index = rl->index_run[last][run]; |
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| 79 | if (index >= rl->n) |
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| 80 | return rl->n; |
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| 81 | if (level > rl->max_level[last][run]) |
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| 82 | return rl->n; |
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| 83 | return index + level - 1; |
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| 84 | } |
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| 85 | |||
| 86 | #endif /* AVCODEC_RL_H */ |