1/*
2 * Header file for hardcoded DV tables
3 *
4 * Copyright (c) 2010 Reimar D��ffinger <Reimar.Doeffinger@gmx.de>
5 *
6 * This file is part of Libav.
7 *
8 * Libav 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 * Libav 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 Libav; 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 "dv_vlc_data.h"
28
29#if CONFIG_SMALL
30#define DV_VLC_MAP_RUN_SIZE 15
31#define DV_VLC_MAP_LEV_SIZE 23
32#else
33#define DV_VLC_MAP_RUN_SIZE  64
34#define DV_VLC_MAP_LEV_SIZE 512 //FIXME sign was removed so this should be /2 but needs check
35#endif
36
37/* VLC encoding lookup table */
38typedef struct dv_vlc_pair {
39   uint32_t vlc;
40   uint32_t size;
41} dv_vlc_pair;
42
43#if CONFIG_HARDCODED_TABLES
44#define dv_vlc_map_tableinit()
45#include "libavcodec/dv_tables.h"
46#else
47static struct dv_vlc_pair dv_vlc_map[DV_VLC_MAP_RUN_SIZE][DV_VLC_MAP_LEV_SIZE];
48
49static void dv_vlc_map_tableinit(void)
50{
51    int i, j;
52    for (i = 0; i < NB_DV_VLC - 1; i++) {
53       if (dv_vlc_run[i] >= DV_VLC_MAP_RUN_SIZE)
54           continue;
55#if CONFIG_SMALL
56       if (dv_vlc_level[i] >= DV_VLC_MAP_LEV_SIZE)
57           continue;
58#endif
59
60       if (dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size != 0)
61           continue;
62
63       dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].vlc  =
64           dv_vlc_bits[i] << (!!dv_vlc_level[i]);
65       dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size =
66           dv_vlc_len[i] + (!!dv_vlc_level[i]);
67    }
68    for (i = 0; i < DV_VLC_MAP_RUN_SIZE; i++) {
69#if CONFIG_SMALL
70       for (j = 1; j < DV_VLC_MAP_LEV_SIZE; j++) {
71          if (dv_vlc_map[i][j].size == 0) {
72              dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc |
73                        (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size));
74              dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size +
75                                      dv_vlc_map[0][j].size;
76          }
77       }
78#else
79       for (j = 1; j < DV_VLC_MAP_LEV_SIZE/2; j++) {
80          if (dv_vlc_map[i][j].size == 0) {
81              dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc |
82                        (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size));
83              dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size +
84                                      dv_vlc_map[0][j].size;
85          }
86          dv_vlc_map[i][((uint16_t)(-j))&0x1ff].vlc =
87                                        dv_vlc_map[i][j].vlc | 1;
88          dv_vlc_map[i][((uint16_t)(-j))&0x1ff].size =
89                                        dv_vlc_map[i][j].size;
90       }
91#endif
92    }
93}
94#endif /* CONFIG_HARDCODED_TABLES */
95
96#endif /* AVCODEC_DV_TABLEGEN_H */
97