h261data.h 5.23 KB
Newer Older
1 2 3 4
/*
 * copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
 * copyright (c) 2004 Maarten Daniels
 *
5
 * This file is part of Libav.
6
 *
7
 * Libav is free software; you can redistribute it and/or
8 9
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
12
 * Libav is distributed in the hope that it will be useful,
13 14 15 16 17
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
18
 * License along with Libav; if not, write to the Free Software
19 20 21
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

22
/**
23
 * @file
24 25 26
 * H.261 tables.
 */

27 28
#ifndef AVCODEC_H261DATA_H
#define AVCODEC_H261DATA_H
29

30 31 32
#include <stdint.h>
#include "h261.h"

33
// H.261 VLC table for macroblock addressing
34
static const uint8_t h261_mba_code[35] = {
35 36 37 38 39 40 41 42 43
     1,  3,  2,  3,
     2,  3,  2,  7,
     6, 11, 10,  9,
     8,  7,  6, 23,
    22, 21, 20, 19,
    18, 35, 34, 33,
    32, 31, 30, 29,
    28, 27, 26, 25,
    24,
44 45
    15,           //(MBA stuffing)
    1             //(start code)
46 47
};

48
static const uint8_t h261_mba_bits[35] = {
49 50 51 52 53 54 55 56 57
     1,  3,  3,  4,
     4,  5,  5,  7,
     7,  8,  8,  8,
     8,  8,  8, 10,
    10, 10, 10, 10,
    10, 11, 11, 11,
    11, 11, 11, 11,
    11, 11, 11, 11,
    11,
58 59
    11,           //(MBA stuffing)
    16            //(start code)
60 61 62
};

//H.261 VLC table for macroblock type
63
static const uint8_t h261_mtype_code[10] = {
64 65 66 67 68
    1,  1,  1,  1,
    1,  1,  1,  1,
    1,  1
};

69
static const uint8_t h261_mtype_bits[10] = {
70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88
    4,  7,  1,  5,
    9,  8, 10,  3,
    2,  6
};

static const int h261_mtype_map[10]= {
        MB_TYPE_INTRA4x4,
        MB_TYPE_INTRA4x4  |  MB_TYPE_QUANT,
                                               MB_TYPE_CBP,
                             MB_TYPE_QUANT  |  MB_TYPE_CBP,
                                                               MB_TYPE_16x16,
                                               MB_TYPE_CBP  |  MB_TYPE_16x16,
                             MB_TYPE_QUANT  |  MB_TYPE_CBP  |  MB_TYPE_16x16,
                                                               MB_TYPE_16x16  |  MB_TYPE_H261_FIL,
                                               MB_TYPE_CBP  |  MB_TYPE_16x16  |  MB_TYPE_H261_FIL,
                             MB_TYPE_QUANT  |  MB_TYPE_CBP  |  MB_TYPE_16x16  |  MB_TYPE_H261_FIL
};

//H.261 VLC table for motion vectors
89
static const uint8_t h261_mv_tab[17][2] = {
90 91 92 93 94 95
    {1,1}, {1,2}, {1,3}, {1,4}, {3,6}, {5,7}, {4,7}, {3,7},
    {11,9}, {10,9}, {9,9}, {17,10}, {16,10}, {15,10}, {14,10}, {13,10}, {12,10}
};

static const int mvmap[17] =
{
96
    0, -1, -2, -3, -4, -5, -6, -7, -8, -9, -10, -11, -12, -13, -14, -15, -16
97 98 99
};

//H.261 VLC table for coded block pattern
100
static const uint8_t h261_cbp_tab[63][2] =
101 102 103 104 105 106 107 108 109 110 111 112
{
    {11,5}, {9,5}, {13,6}, {13,4}, {23,7}, {19,7}, {31,8}, {12,4},
    {22,7}, {18,7}, {30,8}, {19,5}, {27,8}, {23,8}, {19,8}, {11,4},
    {21,7}, {17,7}, {29,8}, {17,5}, {25,8}, {21,8}, {17,8}, {15,6},
    {15,8}, {13,8}, {3,9}, {15,5}, {11,8}, {7,8}, {7,9}, {10,4},
    {20,7}, {16,7}, {28,8}, {14,6}, {14,8}, {12,8}, {2,9}, {16,5},
    {24,8}, {20,8}, {16,8}, {14,5}, {10,8}, {6,8}, {6,9}, {18,5},
    {26,8}, {22,8}, {18,8}, {13,5}, {9,8}, {5,8}, {5,9}, {12,5},
    {8,8}, {4,8}, {4,9}, {7,3}, {10,5}, {8,5}, {12,6}
};

//H.261 VLC table for transform coefficients
113
static const uint16_t h261_tcoeff_vlc[65][2] = {
114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132
{ 0x2, 2 }, { 0x3, 2 },{ 0x4, 4 },{ 0x5, 5 },
{ 0x6, 7 },{ 0x26, 8 },{ 0x21, 8 },{ 0xa, 10 },
{ 0x1d, 12 },{ 0x18, 12 },{ 0x13, 12 },{ 0x10 , 12 },
{ 0x1a, 13},{ 0x19, 13 }, { 0x18, 13 }, { 0x17, 13 },
{ 0x3, 3 }, { 0x6, 6 }, { 0x25 , 8 }, { 0xc, 10 },
{ 0x1b, 12 }, { 0x16, 13 }, { 0x15, 13 }, { 0x5, 4},
{ 0x4, 7}, { 0xb, 10 }, { 0x14, 12 }, { 0x14, 13 },
{ 0x7, 5 }, { 0x24, 8 }, { 0x1c, 12 }, { 0x13, 13 },
{ 0x6, 5 }, { 0xf, 10 }, { 0x12, 12}, { 0x7, 6},
{ 0x9 , 10 }, { 0x12, 13 }, { 0x5, 6 }, { 0x1e, 12 },
{ 0x4, 6 }, { 0x15, 12 }, { 0x7, 7 }, { 0x11, 12},
{ 0x5, 7 }, { 0x11, 13 }, { 0x27, 8 }, { 0x10, 13 },
{ 0x23, 8 }, { 0x22, 8 }, { 0x20, 8 }, { 0xe , 10 },
{ 0xd, 10 }, { 0x8, 10 },{ 0x1f, 12 }, { 0x1a, 12 },
{ 0x19, 12 }, { 0x17, 12 }, { 0x16, 12}, { 0x1f, 13},
{ 0x1e, 13 }, { 0x1d, 13 }, { 0x1c, 13}, { 0x1b, 13},
{ 0x1, 6 }                                             //escape
};

133
static const int8_t h261_tcoeff_level[64] = {
134 135 136 137 138 139 140 141 142 143
    0,  1,  2,  3,  4,  5,  6,  7,
    8,  9, 10, 11, 12, 13, 14, 15,
    1,  2,  3,  4,  5,  6,  7,  1,
    2,  3,  4,  5,  1,  2,  3,  4,
    1,  2,  3,  1,  2,  3,  1,  2,
    1,  2,  1,  2,  1,  2,  1,  2,
    1,  1,  1,  1,  1,  1,  1,  1,
    1,  1,  1,  1,  1,  1,  1,  1
};

144
static const int8_t h261_tcoeff_run[64] = {
145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162
    0,
    0,  0,  0,  0,  0,  0,  0,  0,
    0,  0,  0,  0,  0,  0,  0,  1,
    1,  1,  1,  1,  1,  1,  2,  2,
    2,  2,  2,  3,  3,  3,  3,  4,
    4,  4,  5,  5,  5,  6,  6,  7,
    7,  8,  8,  9,  9, 10, 10, 11,
   12, 13, 14, 15, 16, 17, 18, 19,
   20, 21, 22, 23, 24, 25, 26
};

static RLTable h261_rl_tcoeff = {
    64,
    64,
    h261_tcoeff_vlc,
    h261_tcoeff_run,
    h261_tcoeff_level,
};
163

164
#endif /* AVCODEC_H261DATA_H */