1/*
2 * MPEG1/2 decoder tables
3 * copyright (c) 2000,2001 Fabrice Bellard
4 * copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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/**
24 * @file
25 * MPEG1/2 decoder tables.
26 */
27
28#ifndef AVCODEC_MPEG12DECDATA_H
29#define AVCODEC_MPEG12DECDATA_H
30
31#include <stdint.h>
32#include "mpegvideo.h"
33
34
35#define MB_TYPE_ZERO_MV   0x20000000
36#define IS_ZERO_MV(a)   ((a)&MB_TYPE_ZERO_MV)
37
38static const uint8_t table_mb_ptype[7][2] = {
39    { 3, 5 }, // 0x01 MB_INTRA
40    { 1, 2 }, // 0x02 MB_PAT
41    { 1, 3 }, // 0x08 MB_FOR
42    { 1, 1 }, // 0x0A MB_FOR|MB_PAT
43    { 1, 6 }, // 0x11 MB_QUANT|MB_INTRA
44    { 1, 5 }, // 0x12 MB_QUANT|MB_PAT
45    { 2, 5 }, // 0x1A MB_QUANT|MB_FOR|MB_PAT
46};
47
48static const uint32_t ptype2mb_type[7] = {
49                    MB_TYPE_INTRA,
50                    MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
51                    MB_TYPE_L0,
52                    MB_TYPE_L0 | MB_TYPE_CBP,
53    MB_TYPE_QUANT | MB_TYPE_INTRA,
54    MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
55    MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
56};
57
58static const uint8_t table_mb_btype[11][2] = {
59    { 3, 5 }, // 0x01 MB_INTRA
60    { 2, 3 }, // 0x04 MB_BACK
61    { 3, 3 }, // 0x06 MB_BACK|MB_PAT
62    { 2, 4 }, // 0x08 MB_FOR
63    { 3, 4 }, // 0x0A MB_FOR|MB_PAT
64    { 2, 2 }, // 0x0C MB_FOR|MB_BACK
65    { 3, 2 }, // 0x0E MB_FOR|MB_BACK|MB_PAT
66    { 1, 6 }, // 0x11 MB_QUANT|MB_INTRA
67    { 2, 6 }, // 0x16 MB_QUANT|MB_BACK|MB_PAT
68    { 3, 6 }, // 0x1A MB_QUANT|MB_FOR|MB_PAT
69    { 2, 5 }, // 0x1E MB_QUANT|MB_FOR|MB_BACK|MB_PAT
70};
71
72static const uint32_t btype2mb_type[11] = {
73                    MB_TYPE_INTRA,
74                    MB_TYPE_L1,
75                    MB_TYPE_L1   | MB_TYPE_CBP,
76                    MB_TYPE_L0,
77                    MB_TYPE_L0   | MB_TYPE_CBP,
78                    MB_TYPE_L0L1,
79                    MB_TYPE_L0L1 | MB_TYPE_CBP,
80    MB_TYPE_QUANT | MB_TYPE_INTRA,
81    MB_TYPE_QUANT | MB_TYPE_L1   | MB_TYPE_CBP,
82    MB_TYPE_QUANT | MB_TYPE_L0   | MB_TYPE_CBP,
83    MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
84};
85
86static const uint8_t non_linear_qscale[32] = {
87    0, 1, 2, 3, 4, 5, 6, 7,
88    8,10,12,14,16,18,20,22,
89    24,28,32,36,40,44,48,52,
90    56,64,72,80,88,96,104,112,
91};
92
93#endif /* AVCODEC_MPEG12DECDATA_H */
94