FFmpeg
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 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
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++) {
56  continue;
57 #if CONFIG_SMALL
59  continue;
60 #endif
61 
63  continue;
64 
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 */
const uint8_t ff_dv_vlc_len[NB_DV_VLC]
Definition: dvdata.c:132
Macro definitions for various function/variable attributes.
#define av_cold
Definition: attributes.h:82
static av_cold void dv_vlc_map_tableinit(void)
Definition: dv_tablegen.h:51
ptrdiff_t size
Definition: opengl_enc.c:100
#define NB_DV_VLC
Definition: dvdata.h:29
const uint16_t ff_dv_vlc_bits[NB_DV_VLC]
Definition: dvdata.c:77
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
uint32_t vlc
Definition: dv_tablegen.h:41
#define DV_VLC_MAP_RUN_SIZE
Definition: dv_tablegen.h:35
#define DV_VLC_MAP_LEV_SIZE
Definition: dv_tablegen.h:36
uint32_t size
Definition: dv_tablegen.h:42
const uint8_t ff_dv_vlc_run[NB_DV_VLC]
Definition: dvdata.c:187
static struct dv_vlc_pair dv_vlc_map[DV_VLC_MAP_RUN_SIZE][DV_VLC_MAP_LEV_SIZE]
Definition: dv_tablegen.h:49
const uint8_t ff_dv_vlc_level[NB_DV_VLC]
Definition: dvdata.c:242