Directory: | ../../../ffmpeg/ |
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File: | src/libavcodec/dv_tablegen.h |
Date: | 2022-07-04 19:11:22 |
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Lines: | 20 | 21 | 95.2% |
Branches: | 11 | 12 | 91.7% |
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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 | 22 | static av_cold void dv_vlc_map_tableinit(void) | |
52 | { | ||
53 | int i, j; | ||
54 |
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8998 | for (i = 0; i < NB_DV_VLC - 1; i++) { |
55 |
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8976 | 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 |
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8976 | if (dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].size != 0) |
63 | 638 | continue; | |
64 | |||
65 | 8338 | dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].vlc = | |
66 | 8338 | ff_dv_vlc_bits[i] << (!!ff_dv_vlc_level[i]); | |
67 | 8338 | dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].size = | |
68 | 8338 | ff_dv_vlc_len[i] + (!!ff_dv_vlc_level[i]); | |
69 | } | ||
70 |
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1430 | 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 |
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360448 | for (j = 1; j < DV_VLC_MAP_LEV_SIZE / 2; j++) { |
83 |
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359040 | if (dv_vlc_map[i][j].size == 0) { |
84 | 352110 | dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc | | |
85 | 352110 | (dv_vlc_map[i - 1][0].vlc << | |
86 | 352110 | dv_vlc_map[0][j].size); | |
87 | 352110 | dv_vlc_map[i][j].size = dv_vlc_map[i - 1][0].size + | |
88 | 352110 | dv_vlc_map[0][j].size; | |
89 | } | ||
90 | 359040 | dv_vlc_map[i][((uint16_t) (-j)) & 0x1ff].vlc = dv_vlc_map[i][j].vlc | 1; | |
91 | 359040 | dv_vlc_map[i][((uint16_t) (-j)) & 0x1ff].size = dv_vlc_map[i][j].size; | |
92 | } | ||
93 | #endif | ||
94 | } | ||
95 | 22 | } | |
96 | #endif /* CONFIG_HARDCODED_TABLES */ | ||
97 | |||
98 | #endif /* AVCODEC_DV_TABLEGEN_H */ | ||
99 |