FFmpeg
mpegaudiodec_common.c
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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, 54, 62, 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 
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 
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 }
libm.h
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