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 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
28#include "dvdata.h"
29
30#if CONFIG_SMALL
31#define DV_VLC_MAP_RUN_SIZE 15
32#define DV_VLC_MAP_LEV_SIZE 23
33#else
34#define DV_VLC_MAP_RUN_SIZE  64
35#define DV_VLC_MAP_LEV_SIZE 512 //FIXME sign was removed so this should be /2 but needs check
36#endif
37
38/* VLC encoding lookup table */
39typedef struct dv_vlc_pair {
40   uint32_t vlc;
41   uint32_t size;
42} dv_vlc_pair;
43
44#if CONFIG_HARDCODED_TABLES
45#define dv_vlc_map_tableinit()
46#include "libavcodec/dv_tables.h"
47#else
48static struct dv_vlc_pair dv_vlc_map[DV_VLC_MAP_RUN_SIZE][DV_VLC_MAP_LEV_SIZE];
49
50static void dv_vlc_map_tableinit(void)
51{
52    int i, j;
53    for (i = 0; i < NB_DV_VLC - 1; i++) {
54       if (ff_dv_vlc_run[i] >= DV_VLC_MAP_RUN_SIZE)
55           continue;
56#if CONFIG_SMALL
57       if (ff_dv_vlc_level[i] >= DV_VLC_MAP_LEV_SIZE)
58           continue;
59#endif
60
61       if (dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].size != 0)
62           continue;
63
64       dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].vlc  =
65           ff_dv_vlc_bits[i] << (!!ff_dv_vlc_level[i]);
66       dv_vlc_map[ff_dv_vlc_run[i]][ff_dv_vlc_level[i]].size =
67           ff_dv_vlc_len[i] + (!!ff_dv_vlc_level[i]);
68    }
69    for (i = 0; i < DV_VLC_MAP_RUN_SIZE; i++) {
70#if CONFIG_SMALL
71       for (j = 1; j < DV_VLC_MAP_LEV_SIZE; j++) {
72          if (dv_vlc_map[i][j].size == 0) {
73              dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc |
74                        (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size));
75              dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size +
76                                      dv_vlc_map[0][j].size;
77          }
78       }
79#else
80       for (j = 1; j < DV_VLC_MAP_LEV_SIZE/2; j++) {
81          if (dv_vlc_map[i][j].size == 0) {
82              dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc |
83                        (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size));
84              dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size +
85                                      dv_vlc_map[0][j].size;
86          }
87          dv_vlc_map[i][((uint16_t)(-j))&0x1ff].vlc =
88                                        dv_vlc_map[i][j].vlc | 1;
89          dv_vlc_map[i][((uint16_t)(-j))&0x1ff].size =
90                                        dv_vlc_map[i][j].size;
91       }
92#endif
93    }
94}
95#endif /* CONFIG_HARDCODED_TABLES */
96
97#endif /* AVCODEC_DV_TABLEGEN_H */
98