a7074eb0c6d77e9aec6d96c9982e5b7a92fe58f7
[libav.git] / libavcodec / h261data.h
1 /*
2 * copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
3 * copyright (c) 2004 Maarten Daniels
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg 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.
11 *
12 * FFmpeg 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.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file h261data.h
24 * H.261 tables.
25 */
26
27 #include <stdint.h>
28 #include "h261.h"
29
30 // H.261 VLC table for macroblock addressing
31 static const uint8_t h261_mba_code[35] = {
32 1, 3, 2, 3,
33 2, 3, 2, 7,
34 6, 11, 10, 9,
35 8, 7, 6, 23,
36 22, 21, 20, 19,
37 18, 35, 34, 33,
38 32, 31, 30, 29,
39 28, 27, 26, 25,
40 24,
41 15, //(MBA stuffing)
42 1 //(start code)
43 };
44
45 static const uint8_t h261_mba_bits[35] = {
46 1, 3, 3, 4,
47 4, 5, 5, 7,
48 7, 8, 8, 8,
49 8, 8, 8, 10,
50 10, 10, 10, 10,
51 10, 11, 11, 11,
52 11, 11, 11, 11,
53 11, 11, 11, 11,
54 11,
55 11, //(MBA stuffing)
56 16 //(start code)
57 };
58
59 //H.261 VLC table for macroblock type
60 static const uint8_t h261_mtype_code[10] = {
61 1, 1, 1, 1,
62 1, 1, 1, 1,
63 1, 1
64 };
65
66 static const uint8_t h261_mtype_bits[10] = {
67 4, 7, 1, 5,
68 9, 8, 10, 3,
69 2, 6
70 };
71
72 static const int h261_mtype_map[10]= {
73 MB_TYPE_INTRA4x4,
74 MB_TYPE_INTRA4x4 | MB_TYPE_QUANT,
75 MB_TYPE_CBP,
76 MB_TYPE_QUANT | MB_TYPE_CBP,
77 MB_TYPE_16x16,
78 MB_TYPE_CBP | MB_TYPE_16x16,
79 MB_TYPE_QUANT | MB_TYPE_CBP | MB_TYPE_16x16,
80 MB_TYPE_16x16 | MB_TYPE_H261_FIL,
81 MB_TYPE_CBP | MB_TYPE_16x16 | MB_TYPE_H261_FIL,
82 MB_TYPE_QUANT | MB_TYPE_CBP | MB_TYPE_16x16 | MB_TYPE_H261_FIL
83 };
84
85 //H.261 VLC table for motion vectors
86 static const uint8_t h261_mv_tab[17][2] = {
87 {1,1}, {1,2}, {1,3}, {1,4}, {3,6}, {5,7}, {4,7}, {3,7},
88 {11,9}, {10,9}, {9,9}, {17,10}, {16,10}, {15,10}, {14,10}, {13,10}, {12,10}
89 };
90
91 static const int mvmap[17] =
92 {
93 0, -1, -2, -3, -4, -5, -6, -7, -8, -9, -10, -11, -12, -13, -14, -15, -16
94 };
95
96 //H.261 VLC table for coded block pattern
97 static const uint8_t h261_cbp_tab[63][2] =
98 {
99 {11,5}, {9,5}, {13,6}, {13,4}, {23,7}, {19,7}, {31,8}, {12,4},
100 {22,7}, {18,7}, {30,8}, {19,5}, {27,8}, {23,8}, {19,8}, {11,4},
101 {21,7}, {17,7}, {29,8}, {17,5}, {25,8}, {21,8}, {17,8}, {15,6},
102 {15,8}, {13,8}, {3,9}, {15,5}, {11,8}, {7,8}, {7,9}, {10,4},
103 {20,7}, {16,7}, {28,8}, {14,6}, {14,8}, {12,8}, {2,9}, {16,5},
104 {24,8}, {20,8}, {16,8}, {14,5}, {10,8}, {6,8}, {6,9}, {18,5},
105 {26,8}, {22,8}, {18,8}, {13,5}, {9,8}, {5,8}, {5,9}, {12,5},
106 {8,8}, {4,8}, {4,9}, {7,3}, {10,5}, {8,5}, {12,6}
107 };
108
109 //H.261 VLC table for transform coefficients
110 static const uint16_t h261_tcoeff_vlc[65][2] = {
111 { 0x2, 2 }, { 0x3, 2 },{ 0x4, 4 },{ 0x5, 5 },
112 { 0x6, 7 },{ 0x26, 8 },{ 0x21, 8 },{ 0xa, 10 },
113 { 0x1d, 12 },{ 0x18, 12 },{ 0x13, 12 },{ 0x10 , 12 },
114 { 0x1a, 13},{ 0x19, 13 }, { 0x18, 13 }, { 0x17, 13 },
115 { 0x3, 3 }, { 0x6, 6 }, { 0x25 , 8 }, { 0xc, 10 },
116 { 0x1b, 12 }, { 0x16, 13 }, { 0x15, 13 }, { 0x5, 4},
117 { 0x4, 7}, { 0xb, 10 }, { 0x14, 12 }, { 0x14, 13 },
118 { 0x7, 5 }, { 0x24, 8 }, { 0x1c, 12 }, { 0x13, 13 },
119 { 0x6, 5 }, { 0xf, 10 }, { 0x12, 12}, { 0x7, 6},
120 { 0x9 , 10 }, { 0x12, 13 }, { 0x5, 6 }, { 0x1e, 12 },
121 { 0x4, 6 }, { 0x15, 12 }, { 0x7, 7 }, { 0x11, 12},
122 { 0x5, 7 }, { 0x11, 13 }, { 0x27, 8 }, { 0x10, 13 },
123 { 0x23, 8 }, { 0x22, 8 }, { 0x20, 8 }, { 0xe , 10 },
124 { 0xd, 10 }, { 0x8, 10 },{ 0x1f, 12 }, { 0x1a, 12 },
125 { 0x19, 12 }, { 0x17, 12 }, { 0x16, 12}, { 0x1f, 13},
126 { 0x1e, 13 }, { 0x1d, 13 }, { 0x1c, 13}, { 0x1b, 13},
127 { 0x1, 6 } //escape
128 };
129
130 static const int8_t h261_tcoeff_level[64] = {
131 0, 1, 2, 3, 4, 5, 6, 7,
132 8, 9, 10, 11, 12, 13, 14, 15,
133 1, 2, 3, 4, 5, 6, 7, 1,
134 2, 3, 4, 5, 1, 2, 3, 4,
135 1, 2, 3, 1, 2, 3, 1, 2,
136 1, 2, 1, 2, 1, 2, 1, 2,
137 1, 1, 1, 1, 1, 1, 1, 1,
138 1, 1, 1, 1, 1, 1, 1, 1
139 };
140
141 static const int8_t h261_tcoeff_run[64] = {
142 0,
143 0, 0, 0, 0, 0, 0, 0, 0,
144 0, 0, 0, 0, 0, 0, 0, 1,
145 1, 1, 1, 1, 1, 1, 2, 2,
146 2, 2, 2, 3, 3, 3, 3, 4,
147 4, 4, 5, 5, 5, 6, 6, 7,
148 7, 8, 8, 9, 9, 10, 10, 11,
149 12, 13, 14, 15, 16, 17, 18, 19,
150 20, 21, 22, 23, 24, 25, 26
151 };
152
153 static RLTable h261_rl_tcoeff = {
154 64,
155 64,
156 h261_tcoeff_vlc,
157 h261_tcoeff_run,
158 h261_tcoeff_level,
159 };