FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/dv_tablegen.h
Date: 2021-09-26 18:22:30
Exec Total Coverage
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