FFmpeg
Main Page
Related Pages
Modules
Namespaces
Data Structures
Files
Examples
File List
Globals
All
Data Structures
Namespaces
Files
Functions
Variables
Typedefs
Enumerations
Enumerator
Macros
Groups
Pages
libavcodec
dv_tablegen.h
Go to the documentation of this file.
1
/*
2
* Header file for hardcoded DV tables
3
*
4
* Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
5
*
6
* This file is part of FFmpeg.
7
*
8
* FFmpeg is free software; you can redistribute it and/or
9
* modify it under the terms of the GNU Lesser General Public
10
* License as published by the Free Software Foundation; either
11
* version 2.1 of the License, or (at your option) any later version.
12
*
13
* FFmpeg is distributed in the hope that it will be useful,
14
* but WITHOUT ANY WARRANTY; without even the implied warranty of
15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16
* Lesser General Public License for more details.
17
*
18
* You should have received a copy of the GNU Lesser General Public
19
* License along with FFmpeg; if not, write to the Free Software
20
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21
*/
22
23
#ifndef AVCODEC_DV_TABLEGEN_H
24
#define AVCODEC_DV_TABLEGEN_H
25
26
#include <stdint.h>
27
28
#include "
dvdata.h
"
29
30
#if CONFIG_SMALL
31
#define DV_VLC_MAP_RUN_SIZE 15
32
#define DV_VLC_MAP_LEV_SIZE 23
33
#else
34
#define DV_VLC_MAP_RUN_SIZE 64
35
#define DV_VLC_MAP_LEV_SIZE 512 //FIXME sign was removed so this should be /2 but needs check
36
#endif
37
38
/* VLC encoding lookup table */
39
typedef
struct
dv_vlc_pair
{
40
uint32_t
vlc
;
41
uint32_t
size
;
42
}
dv_vlc_pair
;
43
44
#if CONFIG_HARDCODED_TABLES
45
#define dv_vlc_map_tableinit()
46
#include "libavcodec/dv_tables.h"
47
#else
48
static
struct
dv_vlc_pair
dv_vlc_map
[
DV_VLC_MAP_RUN_SIZE
][
DV_VLC_MAP_LEV_SIZE
];
49
50
static
void
dv_vlc_map_tableinit
(
void
)
51
{
52
int
i, j;
53
for
(i = 0; i <
NB_DV_VLC
- 1; i++) {
54
if
(
ff_dv_vlc_run
[i] >=
DV_VLC_MAP_RUN_SIZE
)
55
continue
;
56
#if CONFIG_SMALL
57
if
(
ff_dv_vlc_level
[i] >=
DV_VLC_MAP_LEV_SIZE
)
58
continue
;
59
#endif
60
61
if
(
dv_vlc_map
[
ff_dv_vlc_run
[i]][
ff_dv_vlc_level
[i]].
size
!= 0)
62
continue
;
63
64
dv_vlc_map
[
ff_dv_vlc_run
[i]][
ff_dv_vlc_level
[i]].
vlc
=
65
ff_dv_vlc_bits
[i] << (!!
ff_dv_vlc_level
[i]);
66
dv_vlc_map
[
ff_dv_vlc_run
[i]][
ff_dv_vlc_level
[i]].
size
=
67
ff_dv_vlc_len
[i] + (!!
ff_dv_vlc_level
[i]);
68
}
69
for
(i = 0; i <
DV_VLC_MAP_RUN_SIZE
; i++) {
70
#if CONFIG_SMALL
71
for
(j = 1; j <
DV_VLC_MAP_LEV_SIZE
; j++) {
72
if
(
dv_vlc_map
[i][j].
size
== 0) {
73
dv_vlc_map
[i][j].
vlc
=
dv_vlc_map
[0][j].
vlc
|
74
(
dv_vlc_map
[i-1][0].
vlc
<< (
dv_vlc_map
[0][j].
size
));
75
dv_vlc_map
[i][j].
size
=
dv_vlc_map
[i-1][0].
size
+
76
dv_vlc_map
[0][j].
size
;
77
}
78
}
79
#else
80
for
(j = 1; j < DV_VLC_MAP_LEV_SIZE/2; j++) {
81
if
(
dv_vlc_map
[i][j].
size
== 0) {
82
dv_vlc_map
[i][j].
vlc
=
dv_vlc_map
[0][j].
vlc
|
83
(
dv_vlc_map
[i-1][0].
vlc
<< (
dv_vlc_map
[0][j].
size
));
84
dv_vlc_map
[i][j].
size
=
dv_vlc_map
[i-1][0].
size
+
85
dv_vlc_map
[0][j].
size
;
86
}
87
dv_vlc_map
[i][((uint16_t)(-j))&0x1ff].
vlc
=
88
dv_vlc_map
[i][j].
vlc
| 1;
89
dv_vlc_map
[i][((uint16_t)(-j))&0x1ff].
size
=
90
dv_vlc_map
[i][j].
size
;
91
}
92
#endif
93
}
94
}
95
#endif
/* CONFIG_HARDCODED_TABLES */
96
97
#endif
/* AVCODEC_DV_TABLEGEN_H */
Generated on Sun Mar 23 2014 23:49:53 for FFmpeg by
1.8.2