blob: a9891edd0a68066f9da06198d6a6010db7f1779f
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 |
24 | * H.261 tables. |
25 | */ |
26 | |
27 | #include <stdint.h> |
28 | |
29 | #include "mpegutils.h" |
30 | #include "rl.h" |
31 | #include "h261.h" |
32 | |
33 | // H.261 VLC table for macroblock addressing |
34 | const uint8_t ff_h261_mba_code[35] = { |
35 | 1, 3, 2, 3, |
36 | 2, 3, 2, 7, |
37 | 6, 11, 10, 9, |
38 | 8, 7, 6, 23, |
39 | 22, 21, 20, 19, |
40 | 18, 35, 34, 33, |
41 | 32, 31, 30, 29, |
42 | 28, 27, 26, 25, |
43 | 24, |
44 | 15, // (MBA stuffing) |
45 | 1 // (start code) |
46 | }; |
47 | |
48 | const uint8_t ff_h261_mba_bits[35] = { |
49 | 1, 3, 3, 4, |
50 | 4, 5, 5, 7, |
51 | 7, 8, 8, 8, |
52 | 8, 8, 8, 10, |
53 | 10, 10, 10, 10, |
54 | 10, 11, 11, 11, |
55 | 11, 11, 11, 11, |
56 | 11, 11, 11, 11, |
57 | 11, |
58 | 11, // (MBA stuffing) |
59 | 16 // (start code) |
60 | }; |
61 | |
62 | // H.261 VLC table for macroblock type |
63 | const uint8_t ff_h261_mtype_code[10] = { |
64 | 1, 1, 1, 1, |
65 | 1, 1, 1, 1, |
66 | 1, 1 |
67 | }; |
68 | |
69 | const uint8_t ff_h261_mtype_bits[10] = { |
70 | 4, 7, 1, 5, |
71 | 9, 8, 10, 3, |
72 | 2, 6 |
73 | }; |
74 | |
75 | const int ff_h261_mtype_map[10] = { |
76 | MB_TYPE_INTRA4x4, |
77 | MB_TYPE_INTRA4x4 | MB_TYPE_QUANT, |
78 | MB_TYPE_CBP, |
79 | MB_TYPE_CBP | MB_TYPE_QUANT, |
80 | MB_TYPE_16x16, |
81 | MB_TYPE_16x16 | MB_TYPE_CBP, |
82 | MB_TYPE_16x16 | MB_TYPE_CBP | MB_TYPE_QUANT, |
83 | MB_TYPE_16x16 | MB_TYPE_H261_FIL, |
84 | MB_TYPE_16x16 | MB_TYPE_H261_FIL | MB_TYPE_CBP, |
85 | MB_TYPE_16x16 | MB_TYPE_H261_FIL | MB_TYPE_CBP | MB_TYPE_QUANT |
86 | }; |
87 | |
88 | // H.261 VLC table for motion vectors |
89 | const uint8_t ff_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 } |
92 | }; |
93 | |
94 | // H.261 VLC table for coded block pattern |
95 | const uint8_t ff_h261_cbp_tab[63][2] = { |
96 | { 11, 5 }, { 9, 5 }, { 13, 6 }, { 13, 4 }, { 23, 7 }, { 19, 7 }, { 31, 8 }, { 12, 4 }, |
97 | { 22, 7 }, { 18, 7 }, { 30, 8 }, { 19, 5 }, { 27, 8 }, { 23, 8 }, { 19, 8 }, { 11, 4 }, |
98 | { 21, 7 }, { 17, 7 }, { 29, 8 }, { 17, 5 }, { 25, 8 }, { 21, 8 }, { 17, 8 }, { 15, 6 }, |
99 | { 15, 8 }, { 13, 8 }, { 3, 9 }, { 15, 5 }, { 11, 8 }, { 7, 8 }, { 7, 9 }, { 10, 4 }, |
100 | { 20, 7 }, { 16, 7 }, { 28, 8 }, { 14, 6 }, { 14, 8 }, { 12, 8 }, { 2, 9 }, { 16, 5 }, |
101 | { 24, 8 }, { 20, 8 }, { 16, 8 }, { 14, 5 }, { 10, 8 }, { 6, 8 }, { 6, 9 }, { 18, 5 }, |
102 | { 26, 8 }, { 22, 8 }, { 18, 8 }, { 13, 5 }, { 9, 8 }, { 5, 8 }, { 5, 9 }, { 12, 5 }, |
103 | { 8, 8 }, { 4, 8 }, { 4, 9 }, { 7, 3 }, { 10, 5 }, { 8, 5 }, { 12, 6 } |
104 | }; |
105 | |
106 | // H.261 VLC table for transform coefficients |
107 | static const uint16_t h261_tcoeff_vlc[65][2] = { |
108 | { 0x2, 2 }, { 0x3, 2 }, { 0x4, 4 }, { 0x5, 5 }, |
109 | { 0x6, 7 }, { 0x26, 8 }, { 0x21, 8 }, { 0xa, 10 }, |
110 | { 0x1d, 12 }, { 0x18, 12 }, { 0x13, 12 }, { 0x10, 12 }, |
111 | { 0x1a, 13 }, { 0x19, 13 }, { 0x18, 13 }, { 0x17, 13 }, |
112 | { 0x3, 3 }, { 0x6, 6 }, { 0x25, 8 }, { 0xc, 10 }, |
113 | { 0x1b, 12 }, { 0x16, 13 }, { 0x15, 13 }, { 0x5, 4 }, |
114 | { 0x4, 7 }, { 0xb, 10 }, { 0x14, 12 }, { 0x14, 13 }, |
115 | { 0x7, 5 }, { 0x24, 8 }, { 0x1c, 12 }, { 0x13, 13 }, |
116 | { 0x6, 5 }, { 0xf, 10 }, { 0x12, 12 }, { 0x7, 6 }, |
117 | { 0x9, 10 }, { 0x12, 13 }, { 0x5, 6 }, { 0x1e, 12 }, |
118 | { 0x4, 6 }, { 0x15, 12 }, { 0x7, 7 }, { 0x11, 12 }, |
119 | { 0x5, 7 }, { 0x11, 13 }, { 0x27, 8 }, { 0x10, 13 }, |
120 | { 0x23, 8 }, { 0x22, 8 }, { 0x20, 8 }, { 0xe, 10 }, |
121 | { 0xd, 10 }, { 0x8, 10 }, { 0x1f, 12 }, { 0x1a, 12 }, |
122 | { 0x19, 12 }, { 0x17, 12 }, { 0x16, 12 }, { 0x1f, 13 }, |
123 | { 0x1e, 13 }, { 0x1d, 13 }, { 0x1c, 13 }, { 0x1b, 13 }, |
124 | { 0x1, 6 } // escape |
125 | }; |
126 | |
127 | static const int8_t h261_tcoeff_level[64] = { |
128 | 0, 1, 2, 3, 4, 5, 6, 7, |
129 | 8, 9, 10, 11, 12, 13, 14, 15, |
130 | 1, 2, 3, 4, 5, 6, 7, 1, |
131 | 2, 3, 4, 5, 1, 2, 3, 4, |
132 | 1, 2, 3, 1, 2, 3, 1, 2, |
133 | 1, 2, 1, 2, 1, 2, 1, 2, |
134 | 1, 1, 1, 1, 1, 1, 1, 1, |
135 | 1, 1, 1, 1, 1, 1, 1, 1 |
136 | }; |
137 | |
138 | static const int8_t h261_tcoeff_run[64] = { |
139 | 0, |
140 | 0, 0, 0, 0, 0, 0, 0, 0, |
141 | 0, 0, 0, 0, 0, 0, 0, 1, |
142 | 1, 1, 1, 1, 1, 1, 2, 2, |
143 | 2, 2, 2, 3, 3, 3, 3, 4, |
144 | 4, 4, 5, 5, 5, 6, 6, 7, |
145 | 7, 8, 8, 9, 9, 10, 10, 11, |
146 | 12, 13, 14, 15, 16, 17, 18, 19, |
147 | 20, 21, 22, 23, 24, 25, 26 |
148 | }; |
149 | |
150 | RLTable ff_h261_rl_tcoeff = { |
151 | 64, |
152 | 64, |
153 | h261_tcoeff_vlc, |
154 | h261_tcoeff_run, |
155 | h261_tcoeff_level, |
156 | }; |
157 |