1 /*
2 * MPEG Audio decoder
3 * copyright (c) 2002 Fabrice Bellard
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 * mpeg audio layer decoder tables.
25 */
26
27 #include <stddef.h>
28 #include <stdint.h>
29
30 #include "libavutil/avassert.h"
31 #include "libavutil/libm.h"
32 #include "libavutil/thread.h"
33
34 #include "mpegaudiodata.h"
35
36 #include "mpegaudiodec_common_tablegen.h"
37
38 uint16_t ff_scale_factor_modshift[64];
39
40 static int16_t division_tab3[1 << 6 ];
41 static int16_t division_tab5[1 << 8 ];
42 static int16_t division_tab9[1 << 11];
43
44 int16_t *const ff_division_tabs[4] = {
45 division_tab3, division_tab5, NULL, division_tab9
46 };
47
48
49 /*******************************************************/
50 /* layer 3 tables */
51
52 const uint8_t ff_slen_table[2][16] = {
53 { 0, 0, 0, 0, 3, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4 },
54 { 0, 1, 2, 3, 0, 1, 2, 3, 1, 2, 3, 1, 2, 3, 2, 3 },
55 };
56
57 const uint8_t ff_lsf_nsf_table[6][3][4] = {
58 { { 6, 5, 5, 5 }, { 9, 9, 9, 9 }, { 6, 9, 9, 9 } },
59 { { 6, 5, 7, 3 }, { 9, 9, 12, 6 }, { 6, 9, 12, 6 } },
60 { { 11, 10, 0, 0 }, { 18, 18, 0, 0 }, { 15, 18, 0, 0 } },
61 { { 7, 7, 7, 0 }, { 12, 12, 12, 0 }, { 6, 15, 12, 0 } },
62 { { 6, 6, 6, 3 }, { 12, 9, 9, 6 }, { 6, 12, 9, 6 } },
63 { { 8, 8, 5, 0 }, { 15, 12, 9, 0 }, { 6, 18, 9, 0 } },
64 };
65
66 /* mpegaudio layer 3 huffman tables */
67 VLC ff_huff_vlc[16];
68 static VLCElem huff_vlc_tables[128 + 128 + 128 + 130 + 128 + 154 + 166 + 142 +
69 204 + 190 + 170 + 542 + 460 + 662 + 414];
70 VLC ff_huff_quad_vlc[2];
71 static VLCElem huff_quad_vlc_tables[64 + 16];
72
73 static const uint8_t mpa_hufflens[] = {
74 /* Huffman table 1 - 4 entries */
75 3, 3, 2, 1,
76 /* Huffman table 2 - 9 entries */
77 6, 6, 5, 5, 5, 3, 3, 3, 1,
78 /* Huffman table 3 - 9 entries */
79 6, 6, 5, 5, 5, 3, 2, 2, 2,
80 /* Huffman table 5 - 16 entries */
81 8, 8, 7, 6, 7, 7, 7, 7, 6, 6, 6, 6, 3, 3, 3, 1,
82 /* Huffman table 6 - 16 entries */
83 7, 7, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 3, 3,
84 /* Huffman table 7 - 36 entries */
85 10, 10, 10, 10, 9, 9, 9, 9, 8, 8, 9, 9, 8, 9, 9, 8, 8, 7, 7,
86 7, 8, 8, 8, 8, 7, 7, 7, 7, 6, 5, 6, 6, 4, 3, 3, 1,
87 /* Huffman table 8 - 36 entries */
88 11, 11, 10, 9, 10, 10, 9, 9, 9, 8, 8, 9, 9, 9, 9, 8, 8, 8, 7,
89 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 3, 3, 2,
90 /* Huffman table 9 - 36 entries */
91 9, 9, 8, 8, 9, 9, 8, 8, 8, 8, 7, 7, 7, 8, 8, 7, 7, 7, 7,
92 6, 6, 6, 6, 5, 5, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3,
93 /* Huffman table 10 - 64 entries */
94 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 11, 11, 10, 9, 9, 10,
95 10, 9, 9, 10, 10, 9, 10, 10, 8, 8, 9, 9, 10, 10, 9, 9, 10, 10, 8,
96 8, 8, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6,
97 6, 6, 6, 4, 3, 3, 1,
98 /* Huffman table 11 - 64 entries */
99 10, 10, 10, 10, 10, 10, 10, 11, 11, 10, 10, 9, 9, 9, 10, 10, 10, 10, 8,
100 8, 9, 9, 7, 8, 8, 8, 8, 8, 9, 9, 9, 9, 8, 7, 8, 8, 7, 7,
101 8, 8, 8, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 7, 7, 6, 5,
102 4, 5, 5, 3, 3, 3, 2,
103 /* Huffman table 12 - 64 entries */
104 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 9, 9, 8, 8, 8, 8, 8, 8,
105 9, 9, 8, 8, 8, 8, 8, 9, 9, 7, 7, 7, 8, 8, 8, 8, 8, 8, 7,
106 7, 7, 7, 8, 8, 7, 7, 7, 6, 6, 6, 6, 7, 7, 6, 5, 5, 5, 4,
107 4, 5, 5, 4, 3, 3, 3,
108 /* Huffman table 13 - 256 entries */
109 19, 19, 18, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 15, 15, 16,
110 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 16, 16, 15, 16, 16, 14, 14, 15,
111 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, 14, 13, 14,
112 14, 13, 13, 14, 14, 13, 14, 14, 13, 14, 14, 13, 14, 14, 13, 13, 14, 14, 12,
113 12, 12, 13, 13, 13, 13, 13, 13, 12, 13, 13, 12, 12, 13, 13, 13, 13, 13, 13,
114 13, 13, 13, 13, 13, 13, 12, 12, 13, 13, 12, 12, 12, 12, 13, 13, 13, 13, 12,
115 13, 13, 12, 11, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 12, 12, 11,
116 11, 12, 12, 11, 12, 12, 12, 12, 11, 11, 12, 12, 11, 12, 12, 11, 12, 12, 11,
117 12, 12, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 11, 11,
118 10, 11, 11, 10, 11, 11, 11, 11, 10, 10, 11, 11, 10, 10, 11, 11, 11, 11, 11,
119 11, 9, 9, 10, 10, 10, 10, 10, 11, 11, 9, 9, 9, 10, 10, 9, 9, 10, 10,
120 10, 10, 10, 10, 10, 10, 10, 10, 8, 9, 9, 9, 9, 9, 9, 10, 10, 9, 9,
121 9, 8, 8, 9, 9, 9, 9, 9, 9, 8, 7, 8, 8, 8, 8, 7, 7, 7, 7,
122 7, 6, 6, 6, 6, 4, 4, 3, 1,
123 /* Huffman table 15 - 256 entries */
124 13, 13, 13, 13, 12, 13, 13, 13, 13, 13, 13, 12, 13, 13, 12, 12, 12, 12, 12,
125 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13,
126 13, 11, 11, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 12, 12, 11, 11, 11, 11,
127 11, 11, 11, 11, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
128 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 11, 11, 11, 11, 11,
129 11, 10, 11, 11, 11, 11, 11, 11, 10, 10, 11, 11, 10, 10, 10, 10, 11, 11, 10,
130 10, 10, 10, 10, 10, 10, 11, 11, 10, 10, 10, 10, 10, 11, 11, 9, 10, 10, 10,
131 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 10, 10, 10, 10, 9, 10, 10, 9, 10,
132 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 10, 10, 9, 9, 9,
133 9, 9, 9, 10, 10, 9, 9, 9, 9, 9, 9, 8, 9, 9, 9, 9, 9, 9, 9,
134 9, 9, 9, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8,
135 8, 8, 9, 9, 8, 8, 8, 8, 8, 8, 8, 9, 9, 8, 7, 8, 8, 7, 7,
136 7, 7, 8, 8, 7, 7, 7, 7, 7, 6, 7, 7, 6, 6, 7, 7, 6, 6, 6,
137 5, 5, 5, 5, 5, 3, 4, 4, 3,
138 /* Huffman table 16 - 256 entries */
139 11, 11, 11, 11, 11, 11, 11, 11, 10, 11, 11, 11, 11, 10, 10, 10, 10, 10, 8,
140 10, 10, 9, 9, 9, 9, 10, 16, 17, 17, 15, 15, 16, 16, 14, 15, 15, 14, 14,
141 15, 15, 14, 14, 15, 15, 15, 15, 14, 15, 15, 14, 13, 8, 9, 9, 8, 8, 13,
142 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 14, 14, 14, 14, 13, 14, 14,
143 13, 13, 13, 14, 14, 14, 14, 13, 13, 14, 14, 13, 14, 14, 12, 13, 13, 13, 13,
144 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 13, 13, 13, 13, 13, 13, 12, 13,
145 13, 12, 12, 13, 13, 11, 12, 12, 12, 12, 12, 12, 12, 13, 13, 11, 12, 12, 12,
146 12, 11, 12, 12, 12, 12, 12, 12, 12, 12, 11, 12, 12, 11, 11, 11, 11, 12, 12,
147 12, 12, 12, 12, 12, 12, 11, 12, 12, 11, 12, 12, 11, 12, 12, 11, 12, 12, 11,
148 10, 10, 11, 11, 11, 11, 11, 11, 10, 10, 11, 11, 10, 10, 11, 11, 11, 11, 11,
149 11, 11, 11, 10, 11, 11, 10, 10, 10, 11, 11, 10, 10, 11, 11, 10, 10, 11, 11,
150 10, 9, 9, 10, 10, 10, 10, 10, 10, 9, 9, 9, 10, 10, 9, 10, 10, 9, 9,
151 8, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 9, 9, 8, 8, 7, 7, 8, 8,
152 7, 6, 6, 6, 6, 4, 4, 3, 1,
153 /* Huffman table 24 - 256 entries */
154 8, 8, 8, 8, 8, 8, 8, 8, 7, 8, 8, 7, 7, 8, 8, 7, 7, 7, 7,
155 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 9, 11, 11, 11, 11, 11, 11, 11, 11,
156 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
157 11, 4, 11, 11, 11, 11, 12, 12, 11, 10, 11, 11, 10, 10, 10, 10, 11, 11, 10,
158 10, 10, 10, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
159 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
160 10, 10, 10, 10, 10, 10, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
161 10, 10, 11, 11, 10, 11, 11, 10, 9, 10, 10, 10, 10, 11, 11, 10, 9, 9, 10,
162 10, 9, 10, 10, 10, 10, 9, 9, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9,
163 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
164 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 9, 9, 9, 10, 10, 8, 9, 9, 8,
165 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 8, 8, 8, 8, 8,
166 8, 9, 9, 7, 8, 8, 7, 7, 7, 7, 7, 8, 8, 7, 7, 6, 6, 7, 7,
167 6, 5, 5, 6, 6, 4, 4, 4, 4,
168 };
169
170 static const uint8_t mpa_huffsymbols[] = {
171 /* Huffman table 1 - 4 entries */
172 0x11, 0x01, 0x10, 0x00,
173 /* Huffman table 2 - 9 entries */
174 0x22, 0x02, 0x12, 0x21, 0x20, 0x11, 0x01, 0x10, 0x00,
175 /* Huffman table 3 - 9 entries */
176 0x22, 0x02, 0x12, 0x21, 0x20, 0x10, 0x11, 0x01, 0x00,
177 /* Huffman table 5 - 16 entries */
178 0x33, 0x23, 0x32, 0x31, 0x13, 0x03, 0x30, 0x22, 0x12, 0x21, 0x02, 0x20,
179 0x11, 0x01, 0x10, 0x00,
180 /* Huffman table 6 - 16 entries */
181 0x33, 0x03, 0x23, 0x32, 0x30, 0x13, 0x31, 0x22, 0x02, 0x12, 0x21, 0x20,
182 0x01, 0x11, 0x10, 0x00,
183 /* Huffman table 7 - 36 entries */
184 0x55, 0x45, 0x54, 0x53, 0x35, 0x44, 0x25, 0x52, 0x15, 0x51, 0x05, 0x34,
185 0x50, 0x43, 0x33, 0x24, 0x42, 0x14, 0x41, 0x40, 0x04, 0x23, 0x32, 0x03,
186 0x13, 0x31, 0x30, 0x22, 0x12, 0x21, 0x02, 0x20, 0x11, 0x01, 0x10, 0x00,
187 /* Huffman table 8 - 36 entries */
188 0x55, 0x54, 0x45, 0x53, 0x35, 0x44, 0x25, 0x52, 0x05, 0x15, 0x51, 0x34,
189 0x43, 0x50, 0x33, 0x24, 0x42, 0x14, 0x41, 0x04, 0x40, 0x23, 0x32, 0x13,
190 0x31, 0x03, 0x30, 0x22, 0x02, 0x20, 0x12, 0x21, 0x11, 0x01, 0x10, 0x00,
191 /* Huffman table 9 - 36 entries */
192 0x55, 0x45, 0x35, 0x53, 0x54, 0x05, 0x44, 0x25, 0x52, 0x15, 0x51, 0x34,
193 0x43, 0x50, 0x04, 0x24, 0x42, 0x33, 0x40, 0x14, 0x41, 0x23, 0x32, 0x13,
194 0x31, 0x03, 0x30, 0x22, 0x02, 0x12, 0x21, 0x20, 0x11, 0x01, 0x10, 0x00,
195 /* Huffman table 10 - 64 entries */
196 0x77, 0x67, 0x76, 0x57, 0x75, 0x66, 0x47, 0x74, 0x56, 0x65, 0x37, 0x73,
197 0x46, 0x55, 0x54, 0x63, 0x27, 0x72, 0x64, 0x07, 0x70, 0x62, 0x45, 0x35,
198 0x06, 0x53, 0x44, 0x17, 0x71, 0x36, 0x26, 0x25, 0x52, 0x15, 0x51, 0x34,
199 0x43, 0x16, 0x61, 0x60, 0x05, 0x50, 0x24, 0x42, 0x33, 0x04, 0x14, 0x41,
200 0x40, 0x23, 0x32, 0x03, 0x13, 0x31, 0x30, 0x22, 0x12, 0x21, 0x02, 0x20,
201 0x11, 0x01, 0x10, 0x00,
202 /* Huffman table 11 - 64 entries */
203 0x77, 0x67, 0x76, 0x75, 0x66, 0x47, 0x74, 0x57, 0x55, 0x56, 0x65, 0x37,
204 0x73, 0x46, 0x45, 0x54, 0x35, 0x53, 0x27, 0x72, 0x64, 0x07, 0x71, 0x17,
205 0x70, 0x36, 0x63, 0x60, 0x44, 0x25, 0x52, 0x05, 0x15, 0x62, 0x26, 0x06,
206 0x16, 0x61, 0x51, 0x34, 0x50, 0x43, 0x33, 0x24, 0x42, 0x14, 0x41, 0x04,
207 0x40, 0x23, 0x32, 0x13, 0x31, 0x03, 0x30, 0x22, 0x21, 0x12, 0x02, 0x20,
208 0x11, 0x01, 0x10, 0x00,
209 /* Huffman table 12 - 64 entries */
210 0x77, 0x67, 0x76, 0x57, 0x75, 0x66, 0x47, 0x74, 0x65, 0x56, 0x37, 0x73,
211 0x55, 0x27, 0x72, 0x46, 0x64, 0x17, 0x71, 0x07, 0x70, 0x36, 0x63, 0x45,
212 0x54, 0x44, 0x06, 0x05, 0x26, 0x62, 0x61, 0x16, 0x60, 0x35, 0x53, 0x25,
213 0x52, 0x15, 0x51, 0x34, 0x43, 0x50, 0x04, 0x24, 0x42, 0x14, 0x33, 0x41,
214 0x23, 0x32, 0x40, 0x03, 0x30, 0x13, 0x31, 0x22, 0x12, 0x21, 0x02, 0x20,
215 0x00, 0x11, 0x01, 0x10,
216 /* Huffman table 13 - 256 entries */
217 0xFE, 0xFC, 0xFD, 0xED, 0xFF, 0xEF, 0xDF, 0xEE, 0xCF, 0xDE, 0xBF, 0xFB,
218 0xCE, 0xDC, 0xAF, 0xE9, 0xEC, 0xDD, 0xFA, 0xCD, 0xBE, 0xEB, 0x9F, 0xF9,
219 0xEA, 0xBD, 0xDB, 0x8F, 0xF8, 0xCC, 0xAE, 0x9E, 0x8E, 0x7F, 0x7E, 0xF7,
220 0xDA, 0xAD, 0xBC, 0xCB, 0xF6, 0x6F, 0xE8, 0x5F, 0x9D, 0xD9, 0xF5, 0xE7,
221 0xAC, 0xBB, 0x4F, 0xF4, 0xCA, 0xE6, 0xF3, 0x3F, 0x8D, 0xD8, 0x2F, 0xF2,
222 0x6E, 0x9C, 0x0F, 0xC9, 0x5E, 0xAB, 0x7D, 0xD7, 0x4E, 0xC8, 0xD6, 0x3E,
223 0xB9, 0x9B, 0xAA, 0x1F, 0xF1, 0xF0, 0xBA, 0xE5, 0xE4, 0x8C, 0x6D, 0xE3,
224 0xE2, 0x2E, 0x0E, 0x1E, 0xE1, 0xE0, 0x5D, 0xD5, 0x7C, 0xC7, 0x4D, 0x8B,
225 0xB8, 0xD4, 0x9A, 0xA9, 0x6C, 0xC6, 0x3D, 0xD3, 0x7B, 0x2D, 0xD2, 0x1D,
226 0xB7, 0x5C, 0xC5, 0x99, 0x7A, 0xC3, 0xA7, 0x97, 0x4B, 0xD1, 0x0D, 0xD0,
227 0x8A, 0xA8, 0x4C, 0xC4, 0x6B, 0xB6, 0x3C, 0x2C, 0xC2, 0x5B, 0xB5, 0x89,
228 0x1C, 0xC1, 0x98, 0x0C, 0xC0, 0xB4, 0x6A, 0xA6, 0x79, 0x3B, 0xB3, 0x88,
229 0x5A, 0x2B, 0xA5, 0x69, 0xA4, 0x78, 0x87, 0x94, 0x77, 0x76, 0xB2, 0x1B,
230 0xB1, 0x0B, 0xB0, 0x96, 0x4A, 0x3A, 0xA3, 0x59, 0x95, 0x2A, 0xA2, 0x1A,
231 0xA1, 0x0A, 0x68, 0xA0, 0x86, 0x49, 0x93, 0x39, 0x58, 0x85, 0x67, 0x29,
232 0x92, 0x57, 0x75, 0x38, 0x83, 0x66, 0x47, 0x74, 0x56, 0x65, 0x73, 0x19,
233 0x91, 0x09, 0x90, 0x48, 0x84, 0x72, 0x46, 0x64, 0x28, 0x82, 0x18, 0x37,
234 0x27, 0x17, 0x71, 0x55, 0x07, 0x70, 0x36, 0x63, 0x45, 0x54, 0x26, 0x62,
235 0x35, 0x81, 0x08, 0x80, 0x16, 0x61, 0x06, 0x60, 0x53, 0x44, 0x25, 0x52,
236 0x05, 0x15, 0x51, 0x34, 0x43, 0x50, 0x24, 0x42, 0x33, 0x14, 0x41, 0x04,
237 0x40, 0x23, 0x32, 0x13, 0x31, 0x03, 0x30, 0x22, 0x12, 0x21, 0x02, 0x20,
238 0x11, 0x01, 0x10, 0x00,
239 /* Huffman table 15 - 256 entries */
240 0xFF, 0xEF, 0xFE, 0xDF, 0xEE, 0xFD, 0xCF, 0xFC, 0xDE, 0xED, 0xBF, 0xFB,
241 0xCE, 0xEC, 0xDD, 0xAF, 0xFA, 0xBE, 0xEB, 0xCD, 0xDC, 0x9F, 0xF9, 0xEA,
242 0xBD, 0xDB, 0x8F, 0xF8, 0xCC, 0x9E, 0xE9, 0x7F, 0xF7, 0xAD, 0xDA, 0xBC,
243 0x6F, 0xAE, 0x0F, 0xCB, 0xF6, 0x8E, 0xE8, 0x5F, 0x9D, 0xF5, 0x7E, 0xE7,
244 0xAC, 0xCA, 0xBB, 0xD9, 0x8D, 0x4F, 0xF4, 0x3F, 0xF3, 0xD8, 0xE6, 0x2F,
245 0xF2, 0x6E, 0xF0, 0x1F, 0xF1, 0x9C, 0xC9, 0x5E, 0xAB, 0xBA, 0xE5, 0x7D,
246 0xD7, 0x4E, 0xE4, 0x8C, 0xC8, 0x3E, 0x6D, 0xD6, 0xE3, 0x9B, 0xB9, 0x2E,
247 0xAA, 0xE2, 0x1E, 0xE1, 0x0E, 0xE0, 0x5D, 0xD5, 0x7C, 0xC7, 0x4D, 0x8B,
248 0xD4, 0xB8, 0x9A, 0xA9, 0x6C, 0xC6, 0x3D, 0xD3, 0xD2, 0x2D, 0x0D, 0x1D,
249 0x7B, 0xB7, 0xD1, 0x5C, 0xD0, 0xC5, 0x8A, 0xA8, 0x4C, 0xC4, 0x6B, 0xB6,
250 0x99, 0x0C, 0x3C, 0xC3, 0x7A, 0xA7, 0xA6, 0xC0, 0x0B, 0xC2, 0x2C, 0x5B,
251 0xB5, 0x1C, 0x89, 0x98, 0xC1, 0x4B, 0xB4, 0x6A, 0x3B, 0x79, 0xB3, 0x97,
252 0x88, 0x2B, 0x5A, 0xB2, 0xA5, 0x1B, 0xB1, 0xB0, 0x69, 0x96, 0x4A, 0xA4,
253 0x78, 0x87, 0x3A, 0xA3, 0x59, 0x95, 0x2A, 0xA2, 0x1A, 0xA1, 0x0A, 0xA0,
254 0x68, 0x86, 0x49, 0x94, 0x39, 0x93, 0x77, 0x09, 0x58, 0x85, 0x29, 0x67,
255 0x76, 0x92, 0x91, 0x19, 0x90, 0x48, 0x84, 0x57, 0x75, 0x38, 0x83, 0x66,
256 0x47, 0x28, 0x82, 0x18, 0x81, 0x74, 0x08, 0x80, 0x56, 0x65, 0x37, 0x73,
257 0x46, 0x27, 0x72, 0x64, 0x17, 0x55, 0x71, 0x07, 0x70, 0x36, 0x63, 0x45,
258 0x54, 0x26, 0x62, 0x16, 0x06, 0x60, 0x35, 0x61, 0x53, 0x44, 0x25, 0x52,
259 0x15, 0x51, 0x05, 0x50, 0x34, 0x43, 0x24, 0x42, 0x33, 0x41, 0x14, 0x04,
260 0x23, 0x32, 0x40, 0x03, 0x13, 0x31, 0x30, 0x22, 0x12, 0x21, 0x02, 0x20,
261 0x11, 0x01, 0x10, 0x00,
262 /* Huffman table 16 - 256 entries */
263 0xEF, 0xFE, 0xDF, 0xFD, 0xCF, 0xFC, 0xBF, 0xFB, 0xAF, 0xFA, 0x9F, 0xF9,
264 0xF8, 0x8F, 0x7F, 0xF7, 0x6F, 0xF6, 0xFF, 0x5F, 0xF5, 0x4F, 0xF4, 0xF3,
265 0xF0, 0x3F, 0xCE, 0xEC, 0xDD, 0xDE, 0xE9, 0xEA, 0xD9, 0xEE, 0xED, 0xEB,
266 0xBE, 0xCD, 0xDC, 0xDB, 0xAE, 0xCC, 0xAD, 0xDA, 0x7E, 0xAC, 0xCA, 0xC9,
267 0x7D, 0x5E, 0xBD, 0xF2, 0x2F, 0x0F, 0x1F, 0xF1, 0x9E, 0xBC, 0xCB, 0x8E,
268 0xE8, 0x9D, 0xE7, 0xBB, 0x8D, 0xD8, 0x6E, 0xE6, 0x9C, 0xAB, 0xBA, 0xE5,
269 0xD7, 0x4E, 0xE4, 0x8C, 0xC8, 0x3E, 0x6D, 0xD6, 0x9B, 0xB9, 0xAA, 0xE1,
270 0xD4, 0xB8, 0xA9, 0x7B, 0xB7, 0xD0, 0xE3, 0x0E, 0xE0, 0x5D, 0xD5, 0x7C,
271 0xC7, 0x4D, 0x8B, 0x9A, 0x6C, 0xC6, 0x3D, 0x5C, 0xC5, 0x0D, 0x8A, 0xA8,
272 0x99, 0x4C, 0xB6, 0x7A, 0x3C, 0x5B, 0x89, 0x1C, 0xC0, 0x98, 0x79, 0xE2,
273 0x2E, 0x1E, 0xD3, 0x2D, 0xD2, 0xD1, 0x3B, 0x97, 0x88, 0x1D, 0xC4, 0x6B,
274 0xC3, 0xA7, 0x2C, 0xC2, 0xB5, 0xC1, 0x0C, 0x4B, 0xB4, 0x6A, 0xA6, 0xB3,
275 0x5A, 0xA5, 0x2B, 0xB2, 0x1B, 0xB1, 0x0B, 0xB0, 0x69, 0x96, 0x4A, 0xA4,
276 0x78, 0x87, 0xA3, 0x3A, 0x59, 0x2A, 0x95, 0x68, 0xA1, 0x86, 0x77, 0x94,
277 0x49, 0x57, 0x67, 0xA2, 0x1A, 0x0A, 0xA0, 0x39, 0x93, 0x58, 0x85, 0x29,
278 0x92, 0x76, 0x09, 0x19, 0x91, 0x90, 0x48, 0x84, 0x75, 0x38, 0x83, 0x66,
279 0x28, 0x82, 0x47, 0x74, 0x18, 0x81, 0x80, 0x08, 0x56, 0x37, 0x73, 0x65,
280 0x46, 0x27, 0x72, 0x64, 0x55, 0x07, 0x17, 0x71, 0x70, 0x36, 0x63, 0x45,
281 0x54, 0x26, 0x62, 0x16, 0x61, 0x06, 0x60, 0x53, 0x35, 0x44, 0x25, 0x52,
282 0x51, 0x15, 0x05, 0x34, 0x43, 0x50, 0x24, 0x42, 0x33, 0x14, 0x41, 0x04,
283 0x40, 0x23, 0x32, 0x13, 0x31, 0x03, 0x30, 0x22, 0x12, 0x21, 0x02, 0x20,
284 0x11, 0x01, 0x10, 0x00,
285 /* Huffman table 24 - 256 entries */
286 0xEF, 0xFE, 0xDF, 0xFD, 0xCF, 0xFC, 0xBF, 0xFB, 0xFA, 0xAF, 0x9F, 0xF9,
287 0xF8, 0x8F, 0x7F, 0xF7, 0x6F, 0xF6, 0x5F, 0xF5, 0x4F, 0xF4, 0x3F, 0xF3,
288 0x2F, 0xF2, 0xF1, 0x1F, 0xF0, 0x0F, 0xEE, 0xDE, 0xED, 0xCE, 0xEC, 0xDD,
289 0xBE, 0xEB, 0xCD, 0xDC, 0xAE, 0xEA, 0xBD, 0xDB, 0xCC, 0x9E, 0xE9, 0xAD,
290 0xDA, 0xBC, 0xCB, 0x8E, 0xE8, 0x9D, 0xD9, 0x7E, 0xE7, 0xAC, 0xFF, 0xCA,
291 0xBB, 0x8D, 0xD8, 0x0E, 0xE0, 0x0D, 0xE6, 0x6E, 0x9C, 0xC9, 0x5E, 0xBA,
292 0xE5, 0xAB, 0x7D, 0xD7, 0xE4, 0x8C, 0xC8, 0x4E, 0x2E, 0x3E, 0x6D, 0xD6,
293 0xE3, 0x9B, 0xB9, 0xAA, 0xE2, 0x1E, 0xE1, 0x5D, 0xD5, 0x7C, 0xC7, 0x4D,
294 0x8B, 0xB8, 0xD4, 0x9A, 0xA9, 0x6C, 0xC6, 0x3D, 0xD3, 0x2D, 0xD2, 0x1D,
295 0x7B, 0xB7, 0xD1, 0x5C, 0xC5, 0x8A, 0xA8, 0x99, 0x4C, 0xC4, 0x6B, 0xB6,
296 0xD0, 0x0C, 0x3C, 0xC3, 0x7A, 0xA7, 0x2C, 0xC2, 0x5B, 0xB5, 0x1C, 0x89,
297 0x98, 0xC1, 0x4B, 0xC0, 0x0B, 0x3B, 0xB0, 0x0A, 0x1A, 0xB4, 0x6A, 0xA6,
298 0x79, 0x97, 0xA0, 0x09, 0x90, 0xB3, 0x88, 0x2B, 0x5A, 0xB2, 0xA5, 0x1B,
299 0xB1, 0x69, 0x96, 0xA4, 0x4A, 0x78, 0x87, 0x3A, 0xA3, 0x59, 0x95, 0x2A,
300 0xA2, 0xA1, 0x68, 0x86, 0x77, 0x49, 0x94, 0x39, 0x93, 0x58, 0x85, 0x29,
301 0x67, 0x76, 0x92, 0x19, 0x91, 0x48, 0x84, 0x57, 0x75, 0x38, 0x83, 0x66,
302 0x28, 0x82, 0x18, 0x47, 0x74, 0x81, 0x08, 0x80, 0x56, 0x65, 0x17, 0x07,
303 0x70, 0x73, 0x37, 0x27, 0x72, 0x46, 0x64, 0x55, 0x71, 0x36, 0x63, 0x45,
304 0x54, 0x26, 0x62, 0x16, 0x61, 0x06, 0x60, 0x35, 0x53, 0x44, 0x25, 0x52,
305 0x15, 0x05, 0x50, 0x51, 0x34, 0x43, 0x24, 0x42, 0x33, 0x14, 0x41, 0x04,
306 0x40, 0x23, 0x32, 0x13, 0x31, 0x03, 0x30, 0x22, 0x12, 0x21, 0x02, 0x20,
307 0x11, 0x01, 0x10, 0x00,
308 };
309
310 static const uint8_t mpa_huff_sizes_minus_one[] =
311 {
312 3, 8, 8, 15, 15, 35, 35, 35, 63, 63, 63, 255, 255, 255, 255
313 };
314
315 const uint8_t ff_mpa_huff_data[32][2] = {
316 { 0, 0 },
317 { 1, 0 },
318 { 2, 0 },
319 { 3, 0 },
320 { 0, 0 },
321 { 4, 0 },
322 { 5, 0 },
323 { 6, 0 },
324 { 7, 0 },
325 { 8, 0 },
326 { 9, 0 },
327 { 10, 0 },
328 { 11, 0 },
329 { 12, 0 },
330 { 0, 0 },
331 { 13, 0 },
332 { 14, 1 },
333 { 14, 2 },
334 { 14, 3 },
335 { 14, 4 },
336 { 14, 6 },
337 { 14, 8 },
338 { 14, 10 },
339 { 14, 13 },
340 { 15, 4 },
341 { 15, 5 },
342 { 15, 6 },
343 { 15, 7 },
344 { 15, 8 },
345 { 15, 9 },
346 { 15, 11 },
347 { 15, 13 },
348 };
349
350
351 /* huffman tables for quadrules */
352 static const uint8_t mpa_quad_codes[2][16] = {
353 { 1, 5, 4, 5, 6, 5, 4, 4, 7, 3, 6, 0, 7, 2, 3, 1, },
354 { 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, },
355 };
356
357 static const uint8_t mpa_quad_bits[2][16] = {
358 { 1, 4, 4, 5, 4, 6, 5, 6, 4, 5, 5, 6, 5, 6, 6, 6, },
359 { 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, },
360 };
361
362 const uint8_t ff_band_size_long[9][22] = {
363 { 4, 4, 4, 4, 4, 4, 6, 6, 8, 8, 10,
364 12, 16, 20, 24, 28, 34, 42, 50, 54, 76, 158, }, /* 44100 */
365 { 4, 4, 4, 4, 4, 4, 6, 6, 6, 8, 10,
366 12, 16, 18, 22, 28, 34, 40, 46, 54, 54, 192, }, /* 48000 */
367 { 4, 4, 4, 4, 4, 4, 6, 6, 8, 10, 12,
368 16, 20, 24, 30, 38, 46, 56, 68, 84, 102, 26, }, /* 32000 */
369 { 6, 6, 6, 6, 6, 6, 8, 10, 12, 14, 16,
370 20, 24, 28, 32, 38, 46, 52, 60, 68, 58, 54, }, /* 22050 */
371 { 6, 6, 6, 6, 6, 6, 8, 10, 12, 14, 16,
372 18, 22, 26, 32, 38, 46, 52, 64, 70, 76, 36, }, /* 24000 */
373 { 6, 6, 6, 6, 6, 6, 8, 10, 12, 14, 16,
374 20, 24, 28, 32, 38, 46, 52, 60, 68, 58, 54, }, /* 16000 */
375 { 6, 6, 6, 6, 6, 6, 8, 10, 12, 14, 16,
376 20, 24, 28, 32, 38, 46, 52, 60, 68, 58, 54, }, /* 11025 */
377 { 6, 6, 6, 6, 6, 6, 8, 10, 12, 14, 16,
378 20, 24, 28, 32, 38, 46, 52, 60, 68, 58, 54, }, /* 12000 */
379 { 12, 12, 12, 12, 12, 12, 16, 20, 24, 28, 32,
380 40, 48, 56, 64, 76, 90, 2, 2, 2, 2, 2, }, /* 8000 */
381 };
382
383 const uint8_t ff_band_size_short[9][13] = {
384 { 4, 4, 4, 4, 6, 8, 10, 12, 14, 18, 22, 30, 56, }, /* 44100 */
385 { 4, 4, 4, 4, 6, 6, 10, 12, 14, 16, 20, 26, 66, }, /* 48000 */
386 { 4, 4, 4, 4, 6, 8, 12, 16, 20, 26, 34, 42, 12, }, /* 32000 */
387 { 4, 4, 4, 6, 6, 8, 10, 14, 18, 26, 32, 42, 18, }, /* 22050 */
388 { 4, 4, 4, 6, 8, 10, 12, 14, 18, 24, 32, 44, 12, }, /* 24000 */
389 { 4, 4, 4, 6, 8, 10, 12, 14, 18, 24, 30, 40, 18, }, /* 16000 */
390 { 4, 4, 4, 6, 8, 10, 12, 14, 18, 24, 30, 40, 18, }, /* 11025 */
391 { 4, 4, 4, 6, 8, 10, 12, 14, 18, 24, 30, 40, 18, }, /* 12000 */
392 { 8, 8, 8, 12, 16, 20, 24, 28, 36, 2, 2, 2, 26, }, /* 8000 */
393 };
394
395 uint16_t ff_band_index_long[9][23];
396
397 const uint8_t ff_mpa_pretab[2][22] = {
398 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
399 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 3, 3, 2, 0 },
400 };
401
mpegaudiodec_common_init_static(void)402 static av_cold void mpegaudiodec_common_init_static(void)
403 {
404 const uint8_t *huff_sym = mpa_huffsymbols, *huff_lens = mpa_hufflens;
405 int offset;
406
407 /* scale factors table for layer 1/2 */
408 for (int i = 0; i < 64; i++) {
409 int shift, mod;
410 /* 1.0 (i = 3) is normalized to 2 ^ FRAC_BITS */
411 shift = i / 3;
412 mod = i % 3;
413 ff_scale_factor_modshift[i] = mod | (shift << 2);
414 }
415
416 /* huffman decode tables */
417 offset = 0;
418 for (int i = 0; i < 15;) {
419 uint16_t tmp_symbols[256];
420 int nb_codes_minus_one = mpa_huff_sizes_minus_one[i];
421 int j;
422
423 for (j = 0; j <= nb_codes_minus_one; j++) {
424 uint8_t high = huff_sym[j] & 0xF0, low = huff_sym[j] & 0xF;
425
426 tmp_symbols[j] = high << 1 | ((high && low) << 4) | low;
427 }
428
429 ff_huff_vlc[++i].table = huff_vlc_tables + offset;
430 ff_huff_vlc[i].table_allocated = FF_ARRAY_ELEMS(huff_vlc_tables) - offset;
431 ff_init_vlc_from_lengths(&ff_huff_vlc[i], 7, j,
432 huff_lens, 1, tmp_symbols, 2, 2,
433 0, INIT_VLC_STATIC_OVERLONG, NULL);
434 offset += ff_huff_vlc[i].table_size;
435 huff_lens += j;
436 huff_sym += j;
437 }
438 av_assert0(offset == FF_ARRAY_ELEMS(huff_vlc_tables));
439
440 offset = 0;
441 for (int i = 0; i < 2; i++) {
442 int bits = i == 0 ? 6 : 4;
443 ff_huff_quad_vlc[i].table = huff_quad_vlc_tables + offset;
444 ff_huff_quad_vlc[i].table_allocated = 1 << bits;
445 offset += 1 << bits;
446 init_vlc(&ff_huff_quad_vlc[i], bits, 16,
447 mpa_quad_bits[i], 1, 1, mpa_quad_codes[i], 1, 1,
448 INIT_VLC_USE_NEW_STATIC);
449 }
450 av_assert0(offset == FF_ARRAY_ELEMS(huff_quad_vlc_tables));
451
452 for (int i = 0; i < 9; i++) {
453 int k = 0;
454 for (int j = 0; j < 22; j++) {
455 ff_band_index_long[i][j] = k;
456 k += ff_band_size_long[i][j] >> 1;
457 }
458 ff_band_index_long[i][22] = k;
459 }
460
461 for (int i = 0; i < 4; i++) {
462 if (ff_mpa_quant_bits[i] < 0) {
463 for (int j = 0; j < (1 << (-ff_mpa_quant_bits[i] + 1)); j++) {
464 int val1, val2, val3, steps;
465 int val = j;
466 steps = ff_mpa_quant_steps[i];
467 val1 = val % steps;
468 val /= steps;
469 val2 = val % steps;
470 val3 = val / steps;
471 ff_division_tabs[i][j] = val1 + (val2 << 4) + (val3 << 8);
472 }
473 }
474 }
475 mpegaudiodec_common_tableinit();
476 }
477
ff_mpegaudiodec_common_init_static(void)478 av_cold void ff_mpegaudiodec_common_init_static(void)
479 {
480 static AVOnce init_static_once = AV_ONCE_INIT;
481
482 ff_thread_once(&init_static_once, mpegaudiodec_common_init_static);
483 }
484