Add FFMPEG_ prefix to all multiple inclusion guards.
[libav.git] / libavcodec / rl.h
1 /*
2 * Copyright (c) 2000-2002 Fabrice Bellard
3 * Copyright (c) 2002-2004 Michael Niedermayer
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file rl.h
24 * rl header.
25 */
26
27 #ifndef FFMPEG_RL_H
28 #define FFMPEG_RL_H
29
30 #include <stdint.h>
31 #include "bitstream.h"
32 #include "mpegvideo.h"
33
34 /** RLTable. */
35 typedef struct RLTable {
36 int n; ///< number of entries of table_vlc minus 1
37 int last; ///< number of values for last = 0
38 const uint16_t (*table_vlc)[2];
39 const int8_t *table_run;
40 const int8_t *table_level;
41 uint8_t *index_run[2]; ///< encoding only
42 int8_t *max_level[2]; ///< encoding & decoding
43 int8_t *max_run[2]; ///< encoding & decoding
44 VLC vlc; ///< decoding only deprecated FIXME remove
45 RL_VLC_ELEM *rl_vlc[32]; ///< decoding only
46 } RLTable;
47
48 /**
49 *
50 * @param static_store static uint8_t array[2][2*MAX_RUN + MAX_LEVEL + 3] which will hold
51 * the level and run tables, if this is NULL av_malloc() will be used
52 */
53 void init_rl(RLTable *rl, uint8_t static_store[2][2*MAX_RUN + MAX_LEVEL + 3]);
54 void init_vlc_rl(RLTable *rl, int use_static);
55
56 static inline int get_rl_index(const RLTable *rl, int last, int run, int level)
57 {
58 int index;
59 index = rl->index_run[last][run];
60 if (index >= rl->n)
61 return rl->n;
62 if (level > rl->max_level[last][run])
63 return rl->n;
64 return index + level - 1;
65 }
66
67 #endif /* FFMPEG_RL_H */