2 * copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
3 * copyright (c) 2004 Maarten Daniels
5 * This file is part of Libav.
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * 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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 #ifndef AVCODEC_H261DATA_H
28 #define AVCODEC_H261DATA_H
33 // H.261 VLC table for macroblock addressing
34 static const uint8_t h261_mba_code[35] = {
48 static const uint8_t h261_mba_bits[35] = {
62 //H.261 VLC table for macroblock type
63 static const uint8_t h261_mtype_code[10] = {
69 static const uint8_t h261_mtype_bits[10] = {
75 static const int h261_mtype_map[10]= {
77 MB_TYPE_INTRA4x4 | MB_TYPE_QUANT,
79 MB_TYPE_QUANT | MB_TYPE_CBP,
81 MB_TYPE_CBP | MB_TYPE_16x16,
82 MB_TYPE_QUANT | MB_TYPE_CBP | MB_TYPE_16x16,
83 MB_TYPE_16x16 | MB_TYPE_H261_FIL,
84 MB_TYPE_CBP | MB_TYPE_16x16 | MB_TYPE_H261_FIL,
85 MB_TYPE_QUANT | MB_TYPE_CBP | MB_TYPE_16x16 | MB_TYPE_H261_FIL
88 //H.261 VLC table for motion vectors
89 static const uint8_t h261_mv_tab[17][2] = {
90 {1,1}, {1,2}, {1,3}, {1,4}, {3,6}, {5,7}, {4,7}, {3,7},
91 {11,9}, {10,9}, {9,9}, {17,10}, {16,10}, {15,10}, {14,10}, {13,10}, {12,10}
94 static const int mvmap[17] =
96 0, -1, -2, -3, -4, -5, -6, -7, -8, -9, -10, -11, -12, -13, -14, -15, -16
99 //H.261 VLC table for coded block pattern
100 static const uint8_t h261_cbp_tab[63][2] =
102 {11,5}, {9,5}, {13,6}, {13,4}, {23,7}, {19,7}, {31,8}, {12,4},
103 {22,7}, {18,7}, {30,8}, {19,5}, {27,8}, {23,8}, {19,8}, {11,4},
104 {21,7}, {17,7}, {29,8}, {17,5}, {25,8}, {21,8}, {17,8}, {15,6},
105 {15,8}, {13,8}, {3,9}, {15,5}, {11,8}, {7,8}, {7,9}, {10,4},
106 {20,7}, {16,7}, {28,8}, {14,6}, {14,8}, {12,8}, {2,9}, {16,5},
107 {24,8}, {20,8}, {16,8}, {14,5}, {10,8}, {6,8}, {6,9}, {18,5},
108 {26,8}, {22,8}, {18,8}, {13,5}, {9,8}, {5,8}, {5,9}, {12,5},
109 {8,8}, {4,8}, {4,9}, {7,3}, {10,5}, {8,5}, {12,6}
112 //H.261 VLC table for transform coefficients
113 static const uint16_t h261_tcoeff_vlc[65][2] = {
114 { 0x2, 2 }, { 0x3, 2 },{ 0x4, 4 },{ 0x5, 5 },
115 { 0x6, 7 },{ 0x26, 8 },{ 0x21, 8 },{ 0xa, 10 },
116 { 0x1d, 12 },{ 0x18, 12 },{ 0x13, 12 },{ 0x10 , 12 },
117 { 0x1a, 13},{ 0x19, 13 }, { 0x18, 13 }, { 0x17, 13 },
118 { 0x3, 3 }, { 0x6, 6 }, { 0x25 , 8 }, { 0xc, 10 },
119 { 0x1b, 12 }, { 0x16, 13 }, { 0x15, 13 }, { 0x5, 4},
120 { 0x4, 7}, { 0xb, 10 }, { 0x14, 12 }, { 0x14, 13 },
121 { 0x7, 5 }, { 0x24, 8 }, { 0x1c, 12 }, { 0x13, 13 },
122 { 0x6, 5 }, { 0xf, 10 }, { 0x12, 12}, { 0x7, 6},
123 { 0x9 , 10 }, { 0x12, 13 }, { 0x5, 6 }, { 0x1e, 12 },
124 { 0x4, 6 }, { 0x15, 12 }, { 0x7, 7 }, { 0x11, 12},
125 { 0x5, 7 }, { 0x11, 13 }, { 0x27, 8 }, { 0x10, 13 },
126 { 0x23, 8 }, { 0x22, 8 }, { 0x20, 8 }, { 0xe , 10 },
127 { 0xd, 10 }, { 0x8, 10 },{ 0x1f, 12 }, { 0x1a, 12 },
128 { 0x19, 12 }, { 0x17, 12 }, { 0x16, 12}, { 0x1f, 13},
129 { 0x1e, 13 }, { 0x1d, 13 }, { 0x1c, 13}, { 0x1b, 13},
133 static const int8_t h261_tcoeff_level[64] = {
134 0, 1, 2, 3, 4, 5, 6, 7,
135 8, 9, 10, 11, 12, 13, 14, 15,
136 1, 2, 3, 4, 5, 6, 7, 1,
137 2, 3, 4, 5, 1, 2, 3, 4,
138 1, 2, 3, 1, 2, 3, 1, 2,
139 1, 2, 1, 2, 1, 2, 1, 2,
140 1, 1, 1, 1, 1, 1, 1, 1,
141 1, 1, 1, 1, 1, 1, 1, 1
144 static const int8_t h261_tcoeff_run[64] = {
146 0, 0, 0, 0, 0, 0, 0, 0,
147 0, 0, 0, 0, 0, 0, 0, 1,
148 1, 1, 1, 1, 1, 1, 2, 2,
149 2, 2, 2, 3, 3, 3, 3, 4,
150 4, 4, 5, 5, 5, 6, 6, 7,
151 7, 8, 8, 9, 9, 10, 10, 11,
152 12, 13, 14, 15, 16, 17, 18, 19,
153 20, 21, 22, 23, 24, 25, 26
156 static RLTable h261_rl_tcoeff = {
164 #endif /* AVCODEC_H261DATA_H */