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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 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 */ |