1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
/*
* Copyright (c) 2000-2002 Fabrice Bellard
* Copyright (c) 2002-2004 Michael Niedermayer
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* rl header.
*/
#ifndef AVCODEC_RL_H
#define AVCODEC_RL_H
#include <stdint.h>
#include "vlc.h"
/* run length table */
#define MAX_RUN 64
#define MAX_LEVEL 64
/** RLTable. */
typedef struct RLTable {
int n; ///< number of entries of table_vlc minus 1
int last; ///< number of values for last = 0
const uint16_t (*table_vlc)[2];
const int8_t *table_run;
const int8_t *table_level;
uint8_t *index_run[2]; ///< encoding only
int8_t *max_level[2]; ///< encoding & decoding
int8_t *max_run[2]; ///< encoding & decoding
VLC vlc; ///< decoding only deprecated FIXME remove
RL_VLC_ELEM *rl_vlc[32]; ///< decoding only
} RLTable;
/**
* @param static_store static uint8_t array[2][2*MAX_RUN + MAX_LEVEL + 3] which will hold
* the level and run tables, if this is NULL av_malloc() will be used
*/
int ff_rl_init(RLTable *rl, uint8_t static_store[2][2*MAX_RUN + MAX_LEVEL + 3]);
void ff_rl_init_vlc(RLTable *rl);
/**
* Free the contents of a dynamically allocated table.
*/
void ff_rl_free(RLTable *rl);
#define INIT_VLC_RL(rl, static_size)\
{\
int q;\
static RL_VLC_ELEM rl_vlc_table[32][static_size];\
INIT_VLC_STATIC(&rl.vlc, 9, rl.n + 1,\
&rl.table_vlc[0][1], 4, 2,\
&rl.table_vlc[0][0], 4, 2, static_size);\
\
if(!rl.rl_vlc[0]){\
for(q=0; q<32; q++)\
rl.rl_vlc[q]= rl_vlc_table[q];\
\
ff_rl_init_vlc(&rl);\
}\
}
static inline int get_rl_index(const RLTable *rl, int last, int run, int level)
{
int index;
index = rl->index_run[last][run];
if (index >= rl->n)
return rl->n;
if (level > rl->max_level[last][run])
return rl->n;
return index + level - 1;
}
#endif /* AVCODEC_RL_H */
|
