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1/*
2** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
3** Copyright (C) 2003 M. Bakker, Ahead Software AG, http://www.nero.com
4**
5** This program is free software; you can redistribute it and/or modify
6** it under the terms of the GNU General Public License as published by
7** the Free Software Foundation; either version 2 of the License, or
8** (at your option) any later version.
9**
10** This program is distributed in the hope that it will be useful,
11** but WITHOUT ANY WARRANTY; without even the implied warranty of
12** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13** GNU General Public License for more details.
14**
15** You should have received a copy of the GNU General Public License
16** along with this program; if not, write to the Free Software
17** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18**
19** Any non-GPL usage of this software or parts of this software is strictly
20** forbidden.
21**
22** Commercial non-GPL licensing of this software is possible.
23** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
24**
25** $Id$
26**/
27
28/* 2-step huffman table HCB_6 */
29
30
31/* 1st step: 5 bits
32 * 2^5 = 32 entries
33 *
34 * Used to find offset into 2nd step table and number of extra bits to get
35 */
36static hcb hcb6_1[] ICONST_ATTR = {
37 /* 4 bit codewords */
38 { /* 00000 */ 0, 0 },
39 { /* */ 0, 0 },
40 { /* 00010 */ 1, 0 },
41 { /* */ 1, 0 },
42 { /* 00100 */ 2, 0 },
43 { /* */ 2, 0 },
44 { /* 00110 */ 3, 0 },
45 { /* */ 3, 0 },
46 { /* 01000 */ 4, 0 },
47 { /* */ 4, 0 },
48 { /* 01010 */ 5, 0 },
49 { /* */ 5, 0 },
50 { /* 01100 */ 6, 0 },
51 { /* */ 6, 0 },
52 { /* 01110 */ 7, 0 },
53 { /* */ 7, 0 },
54 { /* 10000 */ 8, 0 },
55 { /* */ 8, 0 },
56
57 /* 6 bit codewords */
58 { /* 10010 */ 9, 1 },
59 { /* 10011 */ 11, 1 },
60 { /* 10100 */ 13, 1 },
61 { /* 10101 */ 15, 1 },
62 { /* 10110 */ 17, 1 },
63 { /* 10111 */ 19, 1 },
64 { /* 11000 */ 21, 1 },
65 { /* 11001 */ 23, 1 },
66
67 /* 7 bit codewords */
68 { /* 11010 */ 25, 2 },
69 { /* 11011 */ 29, 2 },
70 { /* 11100 */ 33, 2 },
71
72 /* 7/8 bit codewords */
73 { /* 11101 */ 37, 3 },
74
75 /* 8/9 bit codewords */
76 { /* 11110 */ 45, 4 },
77
78 /* 9/10/11 bit codewords */
79 { /* 11111 */ 61, 6 }
80};
81
82/* 2nd step table
83 *
84 * Gives size of codeword and actual data (x,y,v,w)
85 */
86static hcb_2_pair hcb6_2[] ICONST_ATTR = {
87 /* 4 bit codewords */
88 { 4, 0, 0 },
89 { 4, 1, 0 },
90 { 4, 0, -1 },
91 { 4, 0, 1 },
92 { 4, -1, 0 },
93 { 4, 1, 1 },
94 { 4, -1, 1 },
95 { 4, 1, -1 },
96 { 4, -1, -1 },
97
98 /* 6 bit codewords */
99 { 6, 2, -1 },
100 { 6, 2, 1 },
101 { 6, -2, 1 },
102 { 6, -2, -1 },
103 { 6, -2, 0 },
104 { 6, -1, 2 },
105 { 6, 2, 0 },
106 { 6, 1, -2 },
107 { 6, 1, 2 },
108 { 6, 0, -2 },
109 { 6, -1, -2 },
110 { 6, 0, 2 },
111 { 6, 2, -2 },
112 { 6, -2, 2 },
113 { 6, -2, -2 },
114 { 6, 2, 2 },
115
116 /* 7 bit codewords */
117 { 7, -3, 1 },
118 { 7, 3, 1 },
119 { 7, 3, -1 },
120 { 7, -1, 3 },
121 { 7, -3, -1 },
122 { 7, 1, 3 },
123 { 7, 1, -3 },
124 { 7, -1, -3 },
125 { 7, 3, 0 },
126 { 7, -3, 0 },
127 { 7, 0, -3 },
128 { 7, 0, 3 },
129
130 /* 7/8 bit codewords */
131 { 7, 3, 2 }, { 7, 3, 2 },
132 { 8, -3, -2 },
133 { 8, -2, 3 },
134 { 8, 2, 3 },
135 { 8, 3, -2 },
136 { 8, 2, -3 },
137 { 8, -2, -3 },
138
139 /* 8 bit codewords */
140 { 8, -3, 2 }, { 8, -3, 2 },
141 { 8, 3, 3 }, { 8, 3, 3 },
142 { 9, 3, -3 },
143 { 9, -3, -3 },
144 { 9, -3, 3 },
145 { 9, 1, -4 },
146 { 9, -1, -4 },
147 { 9, 4, 1 },
148 { 9, -4, 1 },
149 { 9, -4, -1 },
150 { 9, 1, 4 },
151 { 9, 4, -1 },
152 { 9, -1, 4 },
153 { 9, 0, -4 },
154
155 /* 9/10/11 bit codewords */
156 { 9, -4, 2 }, { 9, -4, 2 }, { 9, -4, 2 }, { 9, -4, 2 },
157 { 9, -4, -2 }, { 9, -4, -2 }, { 9, -4, -2 }, { 9, -4, -2 },
158 { 9, 2, 4 }, { 9, 2, 4 }, { 9, 2, 4 }, { 9, 2, 4 },
159 { 9, -2, -4 }, { 9, -2, -4 }, { 9, -2, -4 }, { 9, -2, -4 },
160 { 9, -4, 0 }, { 9, -4, 0 }, { 9, -4, 0 }, { 9, -4, 0 },
161 { 9, 4, 2 }, { 9, 4, 2 }, { 9, 4, 2 }, { 9, 4, 2 },
162 { 9, 4, -2 }, { 9, 4, -2 }, { 9, 4, -2 }, { 9, 4, -2 },
163 { 9, -2, 4 }, { 9, -2, 4 }, { 9, -2, 4 }, { 9, -2, 4 },
164 { 9, 4, 0 }, { 9, 4, 0 }, { 9, 4, 0 }, { 9, 4, 0 },
165 { 9, 2, -4 }, { 9, 2, -4 }, { 9, 2, -4 }, { 9, 2, -4 },
166 { 9, 0, 4 }, { 9, 0, 4 }, { 9, 0, 4 }, { 9, 0, 4 },
167 { 10, -3, -4 }, { 10, -3, -4 },
168 { 10, -3, 4 }, { 10, -3, 4 },
169 { 10, 3, -4 }, { 10, 3, -4 },
170 { 10, 4, -3 }, { 10, 4, -3 },
171 { 10, 3, 4 }, { 10, 3, 4 },
172 { 10, 4, 3 }, { 10, 4, 3 },
173 { 10, -4, 3 }, { 10, -4, 3 },
174 { 10, -4, -3 }, { 10, -4, -3 },
175 { 11, 4, 4 },
176 { 11, -4, 4 },
177 { 11, -4, -4 },
178 { 11, 4, -4 }
179};
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