blob: 941b5572beddd8c4ebe2b3cfe080d914174fc891
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 | #include "libavutil/attributes.h" |
28 | |
29 | #include "dvdata.h" |
30 | |
31 | #if CONFIG_SMALL |
32 | #define DV_VLC_MAP_RUN_SIZE 15 |
33 | #define DV_VLC_MAP_LEV_SIZE 23 |
34 | #else |
35 | #define DV_VLC_MAP_RUN_SIZE 64 |
36 | #define DV_VLC_MAP_LEV_SIZE 512 // FIXME sign was removed so this should be /2 but needs check |
37 | #endif |
38 | |
39 | /* VLC encoding lookup table */ |
40 | typedef struct dv_vlc_pair { |
41 | uint32_t vlc; |
42 | uint32_t size; |
43 | } dv_vlc_pair; |
44 | |
45 | #if CONFIG_HARDCODED_TABLES |
46 | #define dv_vlc_map_tableinit() |
47 | #include "libavcodec/dv_tables.h" |
48 | #else |
49 | static struct dv_vlc_pair dv_vlc_map[DV_VLC_MAP_RUN_SIZE][DV_VLC_MAP_LEV_SIZE]; |
50 | |
51 | static av_cold void dv_vlc_map_tableinit(void) |
52 | { |
53 | int i, j; |
54 | for (i = 0; i < NB_DV_VLC - 1; i++) { |
55 | if (ff_dv_vlc_run[i] >= DV_VLC_MAP_RUN_SIZE) |
56 | continue; |
57 | #if CONFIG_SMALL |
58 | if (ff_dv_vlc_level[i] >= DV_VLC_MAP_LEV_SIZE) |
59 | continue; |
60 | #endif |
61 | |
62 | if (dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].size != 0) |
63 | continue; |
64 | |
65 | dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].vlc = |
66 | ff_dv_vlc_bits[i] << (!!ff_dv_vlc_level[i]); |
67 | dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].size = |
68 | ff_dv_vlc_len[i] + (!!ff_dv_vlc_level[i]); |
69 | } |
70 | for (i = 0; i < DV_VLC_MAP_RUN_SIZE; i++) { |
71 | #if CONFIG_SMALL |
72 | for (j = 1; j < DV_VLC_MAP_LEV_SIZE; j++) { |
73 | if (dv_vlc_map[i][j].size == 0) { |
74 | dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc | |
75 | (dv_vlc_map[i - 1][0].vlc << |
76 | dv_vlc_map[0][j].size); |
77 | dv_vlc_map[i][j].size = dv_vlc_map[i - 1][0].size + |
78 | dv_vlc_map[0][j].size; |
79 | } |
80 | } |
81 | #else |
82 | for (j = 1; j < DV_VLC_MAP_LEV_SIZE / 2; j++) { |
83 | if (dv_vlc_map[i][j].size == 0) { |
84 | dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc | |
85 | (dv_vlc_map[i - 1][0].vlc << |
86 | dv_vlc_map[0][j].size); |
87 | dv_vlc_map[i][j].size = dv_vlc_map[i - 1][0].size + |
88 | dv_vlc_map[0][j].size; |
89 | } |
90 | dv_vlc_map[i][((uint16_t) (-j)) & 0x1ff].vlc = dv_vlc_map[i][j].vlc | 1; |
91 | dv_vlc_map[i][((uint16_t) (-j)) & 0x1ff].size = dv_vlc_map[i][j].size; |
92 | } |
93 | #endif |
94 | } |
95 | } |
96 | #endif /* CONFIG_HARDCODED_TABLES */ |
97 | |
98 | #endif /* AVCODEC_DV_TABLEGEN_H */ |
99 |