dv_tablegen.h
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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 Libav.
7  *
8  * Libav 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  * Libav 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 Libav; 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 #include "dv_vlc_data.h"
28 
29 #if CONFIG_SMALL
30 #define DV_VLC_MAP_RUN_SIZE 15
31 #define DV_VLC_MAP_LEV_SIZE 23
32 #else
33 #define DV_VLC_MAP_RUN_SIZE 64
34 #define DV_VLC_MAP_LEV_SIZE 512 //FIXME sign was removed so this should be /2 but needs check
35 #endif
36 
37 /* VLC encoding lookup table */
38 typedef struct dv_vlc_pair {
39  uint32_t vlc;
40  uint32_t size;
41 } dv_vlc_pair;
42 
43 #if CONFIG_HARDCODED_TABLES
44 #define dv_vlc_map_tableinit()
45 #include "libavcodec/dv_tables.h"
46 #else
48 
49 static void dv_vlc_map_tableinit(void)
50 {
51  int i, j;
52  for (i = 0; i < NB_DV_VLC - 1; i++) {
54  continue;
55 #if CONFIG_SMALL
57  continue;
58 #endif
59 
60  if (dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size != 0)
61  continue;
62 
64  dv_vlc_bits[i] << (!!dv_vlc_level[i]);
66  dv_vlc_len[i] + (!!dv_vlc_level[i]);
67  }
68  for (i = 0; i < DV_VLC_MAP_RUN_SIZE; i++) {
69 #if CONFIG_SMALL
70  for (j = 1; j < DV_VLC_MAP_LEV_SIZE; j++) {
71  if (dv_vlc_map[i][j].size == 0) {
72  dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc |
73  (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size));
74  dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size +
75  dv_vlc_map[0][j].size;
76  }
77  }
78 #else
79  for (j = 1; j < DV_VLC_MAP_LEV_SIZE/2; j++) {
80  if (dv_vlc_map[i][j].size == 0) {
81  dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc |
82  (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size));
83  dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size +
84  dv_vlc_map[0][j].size;
85  }
86  dv_vlc_map[i][((uint16_t)(-j))&0x1ff].vlc =
87  dv_vlc_map[i][j].vlc | 1;
88  dv_vlc_map[i][((uint16_t)(-j))&0x1ff].size =
89  dv_vlc_map[i][j].size;
90  }
91 #endif
92  }
93 }
94 #endif /* CONFIG_HARDCODED_TABLES */
95 
96 #endif /* AVCODEC_DV_TABLEGEN_H */