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FFmpeg/libavcodec/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/thread.h"

  32. 

  33. #include "mpegaudiodata.h"

  34. 

  35. uint16_t ff_scale_factor_modshift[64];

  36. 

  37. static int16_t division_tab3[1 << 6 ];

  38. static int16_t division_tab5[1 << 8 ];

  39. static int16_t division_tab9[1 << 11];

  40. 

  41. int16_t *const ff_division_tabs[4] = {

  42.     division_tab3, division_tab5, NULL, division_tab9

  43. };

  44. 

  45. 

  46. /*******************************************************/

  47. /* layer 3 tables */

  48. 

  49. const uint8_t ff_slen_table[2][16] = {

  50.     { 0, 0, 0, 0, 3, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4 },

  51.     { 0, 1, 2, 3, 0, 1, 2, 3, 1, 2, 3, 1, 2, 3, 2, 3 },

  52. };

  53. 

  54. const uint8_t ff_lsf_nsf_table[6][3][4] = {

  55.     { {  6,  5,  5, 5 }, {  9,  9,  9, 9 }, {  6,  9,  9, 9 } },

  56.     { {  6,  5,  7, 3 }, {  9,  9, 12, 6 }, {  6,  9, 12, 6 } },

  57.     { { 11, 10,  0, 0 }, { 18, 18,  0, 0 }, { 15, 18,  0, 0 } },

  58.     { {  7,  7,  7, 0 }, { 12, 12, 12, 0 }, {  6, 15, 12, 0 } },

  59.     { {  6,  6,  6, 3 }, { 12,  9,  9, 6 }, {  6, 12,  9, 6 } },

  60.     { {  8,  8,  5, 0 }, { 15, 12,  9, 0 }, {  6, 18,  9, 0 } },

  61. };

  62. 

  63. /* mpegaudio layer 3 huffman tables */

  64. VLC ff_huff_vlc[16];

  65. static VLC_TYPE huff_vlc_tables[128 + 128 + 128 + 130 + 128 + 154 + 166 + 142 +

  66.                                 204 + 190 + 170 + 542 + 460 + 662 + 414][2];

  67. VLC ff_huff_quad_vlc[2];

  68. static VLC_TYPE  huff_quad_vlc_tables[64 + 16][2];

  69. 

  70. static const uint8_t mpa_hufflens[] = {

  71.     /* Huffman table 1 - 4 entries */

  72.      3,  3,  2,  1,

  73.     /* Huffman table 2 - 9 entries */

  74.      6,  6,  5,  5,  5,  3,  3,  3,  1,

  75.     /* Huffman table 3 - 9 entries */

  76.      6,  6,  5,  5,  5,  3,  2,  2,  2,

  77.     /* Huffman table 5 - 16 entries */

  78.      8,  8,  7,  6,  7,  7,  7,  7,  6,  6,  6,  6,  3,  3,  3,  1,

  79.     /* Huffman table 6 - 16 entries */

  80.      7,  7,  6,  6,  6,  5,  5,  5,  5,  4,  4,  4,  3,  2,  3,  3,

  81.     /* Huffman table 7 - 36 entries */

  82.     10, 10, 10, 10,  9,  9,  9,  9,  8,  8,  9,  9,  8,  9,  9,  8,  8,  7,  7,

  83.      7,  8,  8,  8,  8,  7,  7,  7,  7,  6,  5,  6,  6,  4,  3,  3,  1,

  84.     /* Huffman table 8 - 36 entries */

  85.     11, 11, 10,  9, 10, 10,  9,  9,  9,  8,  8,  9,  9,  9,  9,  8,  8,  8,  7,

  86.      8,  8,  8,  8,  8,  8,  8,  8,  6,  6,  6,  4,  4,  2,  3,  3,  2,

  87.     /* Huffman table 9 - 36 entries */

  88.      9,  9,  8,  8,  9,  9,  8,  8,  8,  8,  7,  7,  7,  8,  8,  7,  7,  7,  7,

  89.      6,  6,  6,  6,  5,  5,  6,  6,  5,  5,  4,  4,  4,  3,  3,  3,  3,

  90.     /* Huffman table 10 - 64 entries */

  91.     11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 11, 11, 10,  9,  9, 10,

  92.     10,  9,  9, 10, 10,  9, 10, 10,  8,  8,  9,  9, 10, 10,  9,  9, 10, 10,  8,

  93.      8,  8,  9,  9,  9,  9,  9,  9,  8,  8,  8,  8,  8,  8,  7,  7,  7,  7,  6,

  94.      6,  6,  6,  4,  3,  3,  1,

  95.     /* Huffman table 11 - 64 entries */

  96.     10, 10, 10, 10, 10, 10, 10, 11, 11, 10, 10,  9,  9,  9, 10, 10, 10, 10,  8,

  97.      8,  9,  9,  7,  8,  8,  8,  8,  8,  9,  9,  9,  9,  8,  7,  8,  8,  7,  7,

  98.      8,  8,  8,  9,  9,  8,  8,  8,  8,  8,  8,  7,  7,  6,  6,  7,  7,  6,  5,

  99.      4,  5,  5,  3,  3,  3,  2,

  100.     /* Huffman table 12 - 64 entries */

  101.     10, 10,  9,  9,  9,  9,  9,  9,  9,  8,  8,  9,  9,  8,  8,  8,  8,  8,  8,

  102.      9,  9,  8,  8,  8,  8,  8,  9,  9,  7,  7,  7,  8,  8,  8,  8,  8,  8,  7,

  103.      7,  7,  7,  8,  8,  7,  7,  7,  6,  6,  6,  6,  7,  7,  6,  5,  5,  5,  4,

  104.      4,  5,  5,  4,  3,  3,  3,

  105.     /* Huffman table 13 - 256 entries */

  106.     19, 19, 18, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 15, 15, 16,

  107.     16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 16, 16, 15, 16, 16, 14, 14, 15,

  108.     15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, 14, 13, 14,

  109.     14, 13, 13, 14, 14, 13, 14, 14, 13, 14, 14, 13, 14, 14, 13, 13, 14, 14, 12,

  110.     12, 12, 13, 13, 13, 13, 13, 13, 12, 13, 13, 12, 12, 13, 13, 13, 13, 13, 13,

  111.     13, 13, 13, 13, 13, 13, 12, 12, 13, 13, 12, 12, 12, 12, 13, 13, 13, 13, 12,

  112.     13, 13, 12, 11, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 12, 12, 11,

  113.     11, 12, 12, 11, 12, 12, 12, 12, 11, 11, 12, 12, 11, 12, 12, 11, 12, 12, 11,

  114.     12, 12, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 11, 11,

  115.     10, 11, 11, 10, 11, 11, 11, 11, 10, 10, 11, 11, 10, 10, 11, 11, 11, 11, 11,

  116.     11,  9,  9, 10, 10, 10, 10, 10, 11, 11,  9,  9,  9, 10, 10,  9,  9, 10, 10,

  117.     10, 10, 10, 10, 10, 10, 10, 10,  8,  9,  9,  9,  9,  9,  9, 10, 10,  9,  9,

  118.      9,  8,  8,  9,  9,  9,  9,  9,  9,  8,  7,  8,  8,  8,  8,  7,  7,  7,  7,

  119.      7,  6,  6,  6,  6,  4,  4,  3,  1,

  120.     /* Huffman table 15 - 256 entries */

  121.     13, 13, 13, 13, 12, 13, 13, 13, 13, 13, 13, 12, 13, 13, 12, 12, 12, 12, 12,

  122.     12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13,

  123.     13, 11, 11, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 12, 12, 11, 11, 11, 11,

  124.     11, 11, 11, 11, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,

  125.     11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 11, 11, 11, 11, 11,

  126.     11, 10, 11, 11, 11, 11, 11, 11, 10, 10, 11, 11, 10, 10, 10, 10, 11, 11, 10,

  127.     10, 10, 10, 10, 10, 10, 11, 11, 10, 10, 10, 10, 10, 11, 11,  9, 10, 10, 10,

  128.     10, 10, 10, 10, 10, 10, 10, 10, 10,  9, 10, 10, 10, 10,  9, 10, 10,  9, 10,

  129.     10, 10, 10, 10, 10, 10, 10,  9,  9,  9,  9,  9,  9,  9, 10, 10,  9,  9,  9,

  130.      9,  9,  9, 10, 10,  9,  9,  9,  9,  9,  9,  8,  9,  9,  9,  9,  9,  9,  9,

  131.      9,  9,  9,  8,  8,  8,  8,  9,  9,  9,  9,  9,  9,  9,  9,  8,  8,  8,  8,

  132.      8,  8,  9,  9,  8,  8,  8,  8,  8,  8,  8,  9,  9,  8,  7,  8,  8,  7,  7,

  133.      7,  7,  8,  8,  7,  7,  7,  7,  7,  6,  7,  7,  6,  6,  7,  7,  6,  6,  6,

  134.      5,  5,  5,  5,  5,  3,  4,  4,  3,

  135.     /* Huffman table 16 - 256 entries */

  136.     11, 11, 11, 11, 11, 11, 11, 11, 10, 11, 11, 11, 11, 10, 10, 10, 10, 10,  8,

  137.     10, 10,  9,  9,  9,  9, 10, 16, 17, 17, 15, 15, 16, 16, 14, 15, 15, 14, 14,

  138.     15, 15, 14, 14, 15, 15, 15, 15, 14, 15, 15, 14, 13,  8,  9,  9,  8,  8, 13,

  139.     14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 14, 14, 14, 14, 13, 14, 14,

  140.     13, 13, 13, 14, 14, 14, 14, 13, 13, 14, 14, 13, 14, 14, 12, 13, 13, 13, 13,

  141.     13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 13, 13, 13, 13, 13, 13, 12, 13,

  142.     13, 12, 12, 13, 13, 11, 12, 12, 12, 12, 12, 12, 12, 13, 13, 11, 12, 12, 12,

  143.     12, 11, 12, 12, 12, 12, 12, 12, 12, 12, 11, 12, 12, 11, 11, 11, 11, 12, 12,

  144.     12, 12, 12, 12, 12, 12, 11, 12, 12, 11, 12, 12, 11, 12, 12, 11, 12, 12, 11,

  145.     10, 10, 11, 11, 11, 11, 11, 11, 10, 10, 11, 11, 10, 10, 11, 11, 11, 11, 11,

  146.     11, 11, 11, 10, 11, 11, 10, 10, 10, 11, 11, 10, 10, 11, 11, 10, 10, 11, 11,

  147.     10,  9,  9, 10, 10, 10, 10, 10, 10,  9,  9,  9, 10, 10,  9, 10, 10,  9,  9,

  148.      8,  9,  9,  9,  9,  9,  9,  9,  9,  8,  8,  9,  9,  8,  8,  7,  7,  8,  8,

  149.      7,  6,  6,  6,  6,  4,  4,  3,  1,

  150.     /* Huffman table 24 - 256 entries */

  151.      8,  8,  8,  8,  8,  8,  8,  8,  7,  8,  8,  7,  7,  8,  8,  7,  7,  7,  7,

  152.      7,  7,  7,  7,  7,  7,  7,  7,  8,  8,  9, 11, 11, 11, 11, 11, 11, 11, 11,

  153.     11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,

  154.     11,  4, 11, 11, 11, 11, 12, 12, 11, 10, 11, 11, 10, 10, 10, 10, 11, 11, 10,

  155.     10, 10, 10, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,

  156.     10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,

  157.     10, 10, 10, 10, 10, 10, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,

  158.     10, 10, 11, 11, 10, 11, 11, 10,  9, 10, 10, 10, 10, 11, 11, 10,  9,  9, 10,

  159.     10,  9, 10, 10, 10, 10,  9,  9, 10, 10,  9,  9,  9,  9,  9,  9,  9,  9,  9,

  160.      9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,

  161.      9,  9,  9,  9,  9,  9,  9,  9, 10, 10,  9,  9,  9, 10, 10,  8,  9,  9,  8,

  162.      8,  8,  8,  8,  8,  8,  8,  8,  8,  8,  8,  8,  9,  9,  8,  8,  8,  8,  8,

  163.      8,  9,  9,  7,  8,  8,  7,  7,  7,  7,  7,  8,  8,  7,  7,  6,  6,  7,  7,

  164.      6,  5,  5,  6,  6,  4,  4,  4,  4,

  165. };

  166. 

  167. static const uint8_t mpa_huffsymbols[] = {

  168.     /* Huffman table 1 - 4 entries */

  169.     0x11, 0x01, 0x10, 0x00,

  170.     /* Huffman table 2 - 9 entries */

  171.     0x22, 0x02, 0x12, 0x21, 0x20, 0x11, 0x01, 0x10, 0x00,

  172.     /* Huffman table 3 - 9 entries */

  173.     0x22, 0x02, 0x12, 0x21, 0x20, 0x10, 0x11, 0x01, 0x00,

  174.     /* Huffman table 5 - 16 entries */

  175.     0x33, 0x23, 0x32, 0x31, 0x13, 0x03, 0x30, 0x22, 0x12, 0x21, 0x02, 0x20,

  176.     0x11, 0x01, 0x10, 0x00,

  177.     /* Huffman table 6 - 16 entries */

  178.     0x33, 0x03, 0x23, 0x32, 0x30, 0x13, 0x31, 0x22, 0x02, 0x12, 0x21, 0x20,

  179.     0x01, 0x11, 0x10, 0x00,

  180.     /* Huffman table 7 - 36 entries */

  181.     0x55, 0x45, 0x54, 0x53, 0x35, 0x44, 0x25, 0x52, 0x15, 0x51, 0x05, 0x34,

  182.     0x50, 0x43, 0x33, 0x24, 0x42, 0x14, 0x41, 0x40, 0x04, 0x23, 0x32, 0x03,

  183.     0x13, 0x31, 0x30, 0x22, 0x12, 0x21, 0x02, 0x20, 0x11, 0x01, 0x10, 0x00,

  184.     /* Huffman table 8 - 36 entries */

  185.     0x55, 0x54, 0x45, 0x53, 0x35, 0x44, 0x25, 0x52, 0x05, 0x15, 0x51, 0x34,

  186.     0x43, 0x50, 0x33, 0x24, 0x42, 0x14, 0x41, 0x04, 0x40, 0x23, 0x32, 0x13,

  187.     0x31, 0x03, 0x30, 0x22, 0x02, 0x20, 0x12, 0x21, 0x11, 0x01, 0x10, 0x00,

  188.     /* Huffman table 9 - 36 entries */

  189.     0x55, 0x45, 0x35, 0x53, 0x54, 0x05, 0x44, 0x25, 0x52, 0x15, 0x51, 0x34,

  190.     0x43, 0x50, 0x04, 0x24, 0x42, 0x33, 0x40, 0x14, 0x41, 0x23, 0x32, 0x13,

  191.     0x31, 0x03, 0x30, 0x22, 0x02, 0x12, 0x21, 0x20, 0x11, 0x01, 0x10, 0x00,

  192.     /* Huffman table 10 - 64 entries */

  193.     0x77, 0x67, 0x76, 0x57, 0x75, 0x66, 0x47, 0x74, 0x56, 0x65, 0x37, 0x73,

  194.     0x46, 0x55, 0x54, 0x63, 0x27, 0x72, 0x64, 0x07, 0x70, 0x62, 0x45, 0x35,

  195.     0x06, 0x53, 0x44, 0x17, 0x71, 0x36, 0x26, 0x25, 0x52, 0x15, 0x51, 0x34,

  196.     0x43, 0x16, 0x61, 0x60, 0x05, 0x50, 0x24, 0x42, 0x33, 0x04, 0x14, 0x41,

  197.     0x40, 0x23, 0x32, 0x03, 0x13, 0x31, 0x30, 0x22, 0x12, 0x21, 0x02, 0x20,

  198.     0x11, 0x01, 0x10, 0x00,

  199.     /* Huffman table 11 - 64 entries */

  200.     0x77, 0x67, 0x76, 0x75, 0x66, 0x47, 0x74, 0x57, 0x55, 0x56, 0x65, 0x37,

  201.     0x73, 0x46, 0x45, 0x54, 0x35, 0x53, 0x27, 0x72, 0x64, 0x07, 0x71, 0x17,

  202.     0x70, 0x36, 0x63, 0x60, 0x44, 0x25, 0x52, 0x05, 0x15, 0x62, 0x26, 0x06,

  203.     0x16, 0x61, 0x51, 0x34, 0x50, 0x43, 0x33, 0x24, 0x42, 0x14, 0x41, 0x04,

  204.     0x40, 0x23, 0x32, 0x13, 0x31, 0x03, 0x30, 0x22, 0x21, 0x12, 0x02, 0x20,

  205.     0x11, 0x01, 0x10, 0x00,

  206.     /* Huffman table 12 - 64 entries */

  207.     0x77, 0x67, 0x76, 0x57, 0x75, 0x66, 0x47, 0x74, 0x65, 0x56, 0x37, 0x73,

  208.     0x55, 0x27, 0x72, 0x46, 0x64, 0x17, 0x71, 0x07, 0x70, 0x36, 0x63, 0x45,

  209.     0x54, 0x44, 0x06, 0x05, 0x26, 0x62, 0x61, 0x16, 0x60, 0x35, 0x53, 0x25,

  210.     0x52, 0x15, 0x51, 0x34, 0x43, 0x50, 0x04, 0x24, 0x42, 0x14, 0x33, 0x41,

  211.     0x23, 0x32, 0x40, 0x03, 0x30, 0x13, 0x31, 0x22, 0x12, 0x21, 0x02, 0x20,

  212.     0x00, 0x11, 0x01, 0x10,

  213.     /* Huffman table 13 - 256 entries */

  214.     0xFE, 0xFC, 0xFD, 0xED, 0xFF, 0xEF, 0xDF, 0xEE, 0xCF, 0xDE, 0xBF, 0xFB,

  215.     0xCE, 0xDC, 0xAF, 0xE9, 0xEC, 0xDD, 0xFA, 0xCD, 0xBE, 0xEB, 0x9F, 0xF9,

  216.     0xEA, 0xBD, 0xDB, 0x8F, 0xF8, 0xCC, 0xAE, 0x9E, 0x8E, 0x7F, 0x7E, 0xF7,

  217.     0xDA, 0xAD, 0xBC, 0xCB, 0xF6, 0x6F, 0xE8, 0x5F, 0x9D, 0xD9, 0xF5, 0xE7,

  218.     0xAC, 0xBB, 0x4F, 0xF4, 0xCA, 0xE6, 0xF3, 0x3F, 0x8D, 0xD8, 0x2F, 0xF2,

  219.     0x6E, 0x9C, 0x0F, 0xC9, 0x5E, 0xAB, 0x7D, 0xD7, 0x4E, 0xC8, 0xD6, 0x3E,

  220.     0xB9, 0x9B, 0xAA, 0x1F, 0xF1, 0xF0, 0xBA, 0xE5, 0xE4, 0x8C, 0x6D, 0xE3,

  221.     0xE2, 0x2E, 0x0E, 0x1E, 0xE1, 0xE0, 0x5D, 0xD5, 0x7C, 0xC7, 0x4D, 0x8B,

  222.     0xB8, 0xD4, 0x9A, 0xA9, 0x6C, 0xC6, 0x3D, 0xD3, 0x7B, 0x2D, 0xD2, 0x1D,

  223.     0xB7, 0x5C, 0xC5, 0x99, 0x7A, 0xC3, 0xA7, 0x97, 0x4B, 0xD1, 0x0D, 0xD0,

  224.     0x8A, 0xA8, 0x4C, 0xC4, 0x6B, 0xB6, 0x3C, 0x2C, 0xC2, 0x5B, 0xB5, 0x89,

  225.     0x1C, 0xC1, 0x98, 0x0C, 0xC0, 0xB4, 0x6A, 0xA6, 0x79, 0x3B, 0xB3, 0x88,

  226.     0x5A, 0x2B, 0xA5, 0x69, 0xA4, 0x78, 0x87, 0x94, 0x77, 0x76, 0xB2, 0x1B,

  227.     0xB1, 0x0B, 0xB0, 0x96, 0x4A, 0x3A, 0xA3, 0x59, 0x95, 0x2A, 0xA2, 0x1A,

  228.     0xA1, 0x0A, 0x68, 0xA0, 0x86, 0x49, 0x93, 0x39, 0x58, 0x85, 0x67, 0x29,

  229.     0x92, 0x57, 0x75, 0x38, 0x83, 0x66, 0x47, 0x74, 0x56, 0x65, 0x73, 0x19,

  230.     0x91, 0x09, 0x90, 0x48, 0x84, 0x72, 0x46, 0x64, 0x28, 0x82, 0x18, 0x37,

  231.     0x27, 0x17, 0x71, 0x55, 0x07, 0x70, 0x36, 0x63, 0x45, 0x54, 0x26, 0x62,

  232.     0x35, 0x81, 0x08, 0x80, 0x16, 0x61, 0x06, 0x60, 0x53, 0x44, 0x25, 0x52,

  233.     0x05, 0x15, 0x51, 0x34, 0x43, 0x50, 0x24, 0x42, 0x33, 0x14, 0x41, 0x04,

  234.     0x40, 0x23, 0x32, 0x13, 0x31, 0x03, 0x30, 0x22, 0x12, 0x21, 0x02, 0x20,

  235.     0x11, 0x01, 0x10, 0x00,

  236.     /* Huffman table 15 - 256 entries */

  237.     0xFF, 0xEF, 0xFE, 0xDF, 0xEE, 0xFD, 0xCF, 0xFC, 0xDE, 0xED, 0xBF, 0xFB,

  238.     0xCE, 0xEC, 0xDD, 0xAF, 0xFA, 0xBE, 0xEB, 0xCD, 0xDC, 0x9F, 0xF9, 0xEA,

  239.     0xBD, 0xDB, 0x8F, 0xF8, 0xCC, 0x9E, 0xE9, 0x7F, 0xF7, 0xAD, 0xDA, 0xBC,

  240.     0x6F, 0xAE, 0x0F, 0xCB, 0xF6, 0x8E, 0xE8, 0x5F, 0x9D, 0xF5, 0x7E, 0xE7,

  241.     0xAC, 0xCA, 0xBB, 0xD9, 0x8D, 0x4F, 0xF4, 0x3F, 0xF3, 0xD8, 0xE6, 0x2F,

  242.     0xF2, 0x6E, 0xF0, 0x1F, 0xF1, 0x9C, 0xC9, 0x5E, 0xAB, 0xBA, 0xE5, 0x7D,

  243.     0xD7, 0x4E, 0xE4, 0x8C, 0xC8, 0x3E, 0x6D, 0xD6, 0xE3, 0x9B, 0xB9, 0x2E,

  244.     0xAA, 0xE2, 0x1E, 0xE1, 0x0E, 0xE0, 0x5D, 0xD5, 0x7C, 0xC7, 0x4D, 0x8B,

  245.     0xD4, 0xB8, 0x9A, 0xA9, 0x6C, 0xC6, 0x3D, 0xD3, 0xD2, 0x2D, 0x0D, 0x1D,

  246.     0x7B, 0xB7, 0xD1, 0x5C, 0xD0, 0xC5, 0x8A, 0xA8, 0x4C, 0xC4, 0x6B, 0xB6,

  247.     0x99, 0x0C, 0x3C, 0xC3, 0x7A, 0xA7, 0xA6, 0xC0, 0x0B, 0xC2, 0x2C, 0x5B,

  248.     0xB5, 0x1C, 0x89, 0x98, 0xC1, 0x4B, 0xB4, 0x6A, 0x3B, 0x79, 0xB3, 0x97,

  249.     0x88, 0x2B, 0x5A, 0xB2, 0xA5, 0x1B, 0xB1, 0xB0, 0x69, 0x96, 0x4A, 0xA4,

  250.     0x78, 0x87, 0x3A, 0xA3, 0x59, 0x95, 0x2A, 0xA2, 0x1A, 0xA1, 0x0A, 0xA0,

  251.     0x68, 0x86, 0x49, 0x94, 0x39, 0x93, 0x77, 0x09, 0x58, 0x85, 0x29, 0x67,

  252.     0x76, 0x92, 0x91, 0x19, 0x90, 0x48, 0x84, 0x57, 0x75, 0x38, 0x83, 0x66,

  253.     0x47, 0x28, 0x82, 0x18, 0x81, 0x74, 0x08, 0x80, 0x56, 0x65, 0x37, 0x73,

  254.     0x46, 0x27, 0x72, 0x64, 0x17, 0x55, 0x71, 0x07, 0x70, 0x36, 0x63, 0x45,

  255.     0x54, 0x26, 0x62, 0x16, 0x06, 0x60, 0x35, 0x61, 0x53, 0x44, 0x25, 0x52,

  256.     0x15, 0x51, 0x05, 0x50, 0x34, 0x43, 0x24, 0x42, 0x33, 0x41, 0x14, 0x04,

  257.     0x23, 0x32, 0x40, 0x03, 0x13, 0x31, 0x30, 0x22, 0x12, 0x21, 0x02, 0x20,

  258.     0x11, 0x01, 0x10, 0x00,

  259.     /* Huffman table 16 - 256 entries */

  260.     0xEF, 0xFE, 0xDF, 0xFD, 0xCF, 0xFC, 0xBF, 0xFB, 0xAF, 0xFA, 0x9F, 0xF9,

  261.     0xF8, 0x8F, 0x7F, 0xF7, 0x6F, 0xF6, 0xFF, 0x5F, 0xF5, 0x4F, 0xF4, 0xF3,

  262.     0xF0, 0x3F, 0xCE, 0xEC, 0xDD, 0xDE, 0xE9, 0xEA, 0xD9, 0xEE, 0xED, 0xEB,

  263.     0xBE, 0xCD, 0xDC, 0xDB, 0xAE, 0xCC, 0xAD, 0xDA, 0x7E, 0xAC, 0xCA, 0xC9,

  264.     0x7D, 0x5E, 0xBD, 0xF2, 0x2F, 0x0F, 0x1F, 0xF1, 0x9E, 0xBC, 0xCB, 0x8E,

  265.     0xE8, 0x9D, 0xE7, 0xBB, 0x8D, 0xD8, 0x6E, 0xE6, 0x9C, 0xAB, 0xBA, 0xE5,

  266.     0xD7, 0x4E, 0xE4, 0x8C, 0xC8, 0x3E, 0x6D, 0xD6, 0x9B, 0xB9, 0xAA, 0xE1,

  267.     0xD4, 0xB8, 0xA9, 0x7B, 0xB7, 0xD0, 0xE3, 0x0E, 0xE0, 0x5D, 0xD5, 0x7C,

  268.     0xC7, 0x4D, 0x8B, 0x9A, 0x6C, 0xC6, 0x3D, 0x5C, 0xC5, 0x0D, 0x8A, 0xA8,

  269.     0x99, 0x4C, 0xB6, 0x7A, 0x3C, 0x5B, 0x89, 0x1C, 0xC0, 0x98, 0x79, 0xE2,

  270.     0x2E, 0x1E, 0xD3, 0x2D, 0xD2, 0xD1, 0x3B, 0x97, 0x88, 0x1D, 0xC4, 0x6B,

  271.     0xC3, 0xA7, 0x2C, 0xC2, 0xB5, 0xC1, 0x0C, 0x4B, 0xB4, 0x6A, 0xA6, 0xB3,

  272.     0x5A, 0xA5, 0x2B, 0xB2, 0x1B, 0xB1, 0x0B, 0xB0, 0x69, 0x96, 0x4A, 0xA4,

  273.     0x78, 0x87, 0xA3, 0x3A, 0x59, 0x2A, 0x95, 0x68, 0xA1, 0x86, 0x77, 0x94,

  274.     0x49, 0x57, 0x67, 0xA2, 0x1A, 0x0A, 0xA0, 0x39, 0x93, 0x58, 0x85, 0x29,

  275.     0x92, 0x76, 0x09, 0x19, 0x91, 0x90, 0x48, 0x84, 0x75, 0x38, 0x83, 0x66,

  276.     0x28, 0x82, 0x47, 0x74, 0x18, 0x81, 0x80, 0x08, 0x56, 0x37, 0x73, 0x65,

  277.     0x46, 0x27, 0x72, 0x64, 0x55, 0x07, 0x17, 0x71, 0x70, 0x36, 0x63, 0x45,

  278.     0x54, 0x26, 0x62, 0x16, 0x61, 0x06, 0x60, 0x53, 0x35, 0x44, 0x25, 0x52,

  279.     0x51, 0x15, 0x05, 0x34, 0x43, 0x50, 0x24, 0x42, 0x33, 0x14, 0x41, 0x04,

  280.     0x40, 0x23, 0x32, 0x13, 0x31, 0x03, 0x30, 0x22, 0x12, 0x21, 0x02, 0x20,

  281.     0x11, 0x01, 0x10, 0x00,

  282.     /* Huffman table 24 - 256 entries */

  283.     0xEF, 0xFE, 0xDF, 0xFD, 0xCF, 0xFC, 0xBF, 0xFB, 0xFA, 0xAF, 0x9F, 0xF9,

  284.     0xF8, 0x8F, 0x7F, 0xF7, 0x6F, 0xF6, 0x5F, 0xF5, 0x4F, 0xF4, 0x3F, 0xF3,

  285.     0x2F, 0xF2, 0xF1, 0x1F, 0xF0, 0x0F, 0xEE, 0xDE, 0xED, 0xCE, 0xEC, 0xDD,

  286.     0xBE, 0xEB, 0xCD, 0xDC, 0xAE, 0xEA, 0xBD, 0xDB, 0xCC, 0x9E, 0xE9, 0xAD,

  287.     0xDA, 0xBC, 0xCB, 0x8E, 0xE8, 0x9D, 0xD9, 0x7E, 0xE7, 0xAC, 0xFF, 0xCA,

  288.     0xBB, 0x8D, 0xD8, 0x0E, 0xE0, 0x0D, 0xE6, 0x6E, 0x9C, 0xC9, 0x5E, 0xBA,

  289.     0xE5, 0xAB, 0x7D, 0xD7, 0xE4, 0x8C, 0xC8, 0x4E, 0x2E, 0x3E, 0x6D, 0xD6,

  290.     0xE3, 0x9B, 0xB9, 0xAA, 0xE2, 0x1E, 0xE1, 0x5D, 0xD5, 0x7C, 0xC7, 0x4D,

  291.     0x8B, 0xB8, 0xD4, 0x9A, 0xA9, 0x6C, 0xC6, 0x3D, 0xD3, 0x2D, 0xD2, 0x1D,

  292.     0x7B, 0xB7, 0xD1, 0x5C, 0xC5, 0x8A, 0xA8, 0x99, 0x4C, 0xC4, 0x6B, 0xB6,

  293.     0xD0, 0x0C, 0x3C, 0xC3, 0x7A, 0xA7, 0x2C, 0xC2, 0x5B, 0xB5, 0x1C, 0x89,

  294.     0x98, 0xC1, 0x4B, 0xC0, 0x0B, 0x3B, 0xB0, 0x0A, 0x1A, 0xB4, 0x6A, 0xA6,

  295.     0x79, 0x97, 0xA0, 0x09, 0x90, 0xB3, 0x88, 0x2B, 0x5A, 0xB2, 0xA5, 0x1B,

  296.     0xB1, 0x69, 0x96, 0xA4, 0x4A, 0x78, 0x87, 0x3A, 0xA3, 0x59, 0x95, 0x2A,

  297.     0xA2, 0xA1, 0x68, 0x86, 0x77, 0x49, 0x94, 0x39, 0x93, 0x58, 0x85, 0x29,

  298.     0x67, 0x76, 0x92, 0x19, 0x91, 0x48, 0x84, 0x57, 0x75, 0x38, 0x83, 0x66,

  299.     0x28, 0x82, 0x18, 0x47, 0x74, 0x81, 0x08, 0x80, 0x56, 0x65, 0x17, 0x07,

  300.     0x70, 0x73, 0x37, 0x27, 0x72, 0x46, 0x64, 0x55, 0x71, 0x36, 0x63, 0x45,

  301.     0x54, 0x26, 0x62, 0x16, 0x61, 0x06, 0x60, 0x35, 0x53, 0x44, 0x25, 0x52,

  302.     0x15, 0x05, 0x50, 0x51, 0x34, 0x43, 0x24, 0x42, 0x33, 0x14, 0x41, 0x04,

  303.     0x40, 0x23, 0x32, 0x13, 0x31, 0x03, 0x30, 0x22, 0x12, 0x21, 0x02, 0x20,

  304.     0x11, 0x01, 0x10, 0x00,

  305. };

  306. 

  307. static const uint8_t mpa_huff_sizes_minus_one[] =

  308. {

  309.     3, 8, 8, 15, 15, 35, 35, 35, 63, 63, 63, 255, 255, 255, 255

  310. };

  311. 

  312. const uint8_t ff_mpa_huff_data[32][2] = {

  313. { 0, 0 },

  314. { 1, 0 },

  315. { 2, 0 },

  316. { 3, 0 },

  317. { 0, 0 },

  318. { 4, 0 },

  319. { 5, 0 },

  320. { 6, 0 },

  321. { 7, 0 },

  322. { 8, 0 },

  323. { 9, 0 },

  324. { 10, 0 },

  325. { 11, 0 },

  326. { 12, 0 },

  327. { 0, 0 },

  328. { 13, 0 },

  329. { 14, 1 },

  330. { 14, 2 },

  331. { 14, 3 },

  332. { 14, 4 },

  333. { 14, 6 },

  334. { 14, 8 },

  335. { 14, 10 },

  336. { 14, 13 },

  337. { 15, 4 },

  338. { 15, 5 },

  339. { 15, 6 },

  340. { 15, 7 },

  341. { 15, 8 },

  342. { 15, 9 },

  343. { 15, 11 },

  344. { 15, 13 },

  345. };

  346. 

  347. 

  348. /* huffman tables for quadrules */

  349. static const uint8_t mpa_quad_codes[2][16] = {

  350.     {  1,  5,  4,  5,  6,  5,  4,  4, 7,  3,  6,  0,  7,  2,  3,  1, },

  351.     { 15, 14, 13, 12, 11, 10,  9,  8, 7,  6,  5,  4,  3,  2,  1,  0, },

  352. };

  353. 

  354. static const uint8_t mpa_quad_bits[2][16] = {

  355.     { 1, 4, 4, 5, 4, 6, 5, 6, 4, 5, 5, 6, 5, 6, 6, 6, },

  356.     { 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, },

  357. };

  358. 

  359. const uint8_t ff_band_size_long[9][22] = {

  360. { 4, 4, 4, 4, 4, 4, 6, 6, 8, 8, 10,

  361.   12, 16, 20, 24, 28, 34, 42, 50, 54, 76, 158, }, /* 44100 */

  362. { 4, 4, 4, 4, 4, 4, 6, 6, 6, 8, 10,

  363.   12, 16, 18, 22, 28, 34, 40, 46, 54, 54, 192, }, /* 48000 */

  364. { 4, 4, 4, 4, 4, 4, 6, 6, 8, 10, 12,

  365.   16, 20, 24, 30, 38, 46, 56, 68, 84, 102, 26, }, /* 32000 */

  366. { 6, 6, 6, 6, 6, 6, 8, 10, 12, 14, 16,

  367.   20, 24, 28, 32, 38, 46, 52, 60, 68, 58, 54, }, /* 22050 */

  368. { 6, 6, 6, 6, 6, 6, 8, 10, 12, 14, 16,

  369.   18, 22, 26, 32, 38, 46, 52, 64, 70, 76, 36, }, /* 24000 */

  370. { 6, 6, 6, 6, 6, 6, 8, 10, 12, 14, 16,

  371.   20, 24, 28, 32, 38, 46, 52, 60, 68, 58, 54, }, /* 16000 */

  372. { 6, 6, 6, 6, 6, 6, 8, 10, 12, 14, 16,

  373.   20, 24, 28, 32, 38, 46, 52, 60, 68, 58, 54, }, /* 11025 */

  374. { 6, 6, 6, 6, 6, 6, 8, 10, 12, 14, 16,

  375.   20, 24, 28, 32, 38, 46, 52, 60, 68, 58, 54, }, /* 12000 */

  376. { 12, 12, 12, 12, 12, 12, 16, 20, 24, 28, 32,

  377.   40, 48, 56, 64, 76, 90, 2, 2, 2, 2, 2, }, /* 8000 */

  378. };

  379. 

  380. const uint8_t ff_band_size_short[9][13] = {

  381. { 4, 4, 4, 4, 6, 8, 10, 12, 14, 18, 22, 30, 56, }, /* 44100 */

  382. { 4, 4, 4, 4, 6, 6, 10, 12, 14, 16, 20, 26, 66, }, /* 48000 */

  383. { 4, 4, 4, 4, 6, 8, 12, 16, 20, 26, 34, 42, 12, }, /* 32000 */

  384. { 4, 4, 4, 6, 6, 8, 10, 14, 18, 26, 32, 42, 18, }, /* 22050 */

  385. { 4, 4, 4, 6, 8, 10, 12, 14, 18, 24, 32, 44, 12, }, /* 24000 */

  386. { 4, 4, 4, 6, 8, 10, 12, 14, 18, 24, 30, 40, 18, }, /* 16000 */

  387. { 4, 4, 4, 6, 8, 10, 12, 14, 18, 24, 30, 40, 18, }, /* 11025 */

  388. { 4, 4, 4, 6, 8, 10, 12, 14, 18, 24, 30, 40, 18, }, /* 12000 */

  389. { 8, 8, 8, 12, 16, 20, 24, 28, 36, 2, 2, 2, 26, }, /* 8000 */

  390. };

  391. 

  392. uint16_t ff_band_index_long[9][23];

  393. 

  394. const uint8_t ff_mpa_pretab[2][22] = {

  395.     { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },

  396.     { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 3, 3, 2, 0 },

  397. };

  398. 

  399. static av_cold void mpegaudiodec_common_init_static(void)

  400. {

  401.     const uint8_t *huff_sym = mpa_huffsymbols, *huff_lens = mpa_hufflens;

  402.     int offset;

  403. 

  404.     /* scale factors table for layer 1/2 */

  405.     for (int i = 0; i < 64; i++) {

  406.         int shift, mod;

  407.         /* 1.0 (i = 3) is normalized to 2 ^ FRAC_BITS */

  408.         shift = i / 3;

  409.         mod   = i % 3;

  410.         ff_scale_factor_modshift[i] = mod | (shift << 2);

  411.     }

  412. 

  413.     /* huffman decode tables */

  414.     offset = 0;

  415.     for (int i = 0; i < 15;) {

  416.         uint16_t tmp_symbols[256];

  417.         int nb_codes_minus_one = mpa_huff_sizes_minus_one[i];

  418.         int j;

  419. 

  420.         for (j = 0; j <= nb_codes_minus_one; j++) {

  421.             uint8_t high = huff_sym[j] & 0xF0, low = huff_sym[j] & 0xF;

  422. 

  423.             tmp_symbols[j] = high << 1 | ((high && low) << 4) | low;

  424.         }

  425. 

  426.         ff_huff_vlc[++i].table         = huff_vlc_tables + offset;

  427.         ff_huff_vlc[i].table_allocated = FF_ARRAY_ELEMS(huff_vlc_tables) - offset;

  428.         ff_init_vlc_from_lengths(&ff_huff_vlc[i], 7, j,

  429.                                  huff_lens, 1, tmp_symbols, 2, 2,

  430.                                  0, INIT_VLC_STATIC_OVERLONG, NULL);

  431.         offset    += ff_huff_vlc[i].table_size;

  432.         huff_lens += j;

  433.         huff_sym  += j;

  434.     }

  435.     av_assert0(offset == FF_ARRAY_ELEMS(huff_vlc_tables));

  436. 

  437.     offset = 0;

  438.     for (int i = 0; i < 2; i++) {

  439.         int bits = i == 0 ? 6 : 4;

  440.         ff_huff_quad_vlc[i].table = huff_quad_vlc_tables + offset;

  441.         ff_huff_quad_vlc[i].table_allocated = 1 << bits;

  442.         offset                             += 1 << bits;

  443.         init_vlc(&ff_huff_quad_vlc[i], bits, 16,

  444.                  mpa_quad_bits[i], 1, 1, mpa_quad_codes[i], 1, 1,

  445.                  INIT_VLC_USE_NEW_STATIC);

  446.     }

  447.     av_assert0(offset == FF_ARRAY_ELEMS(huff_quad_vlc_tables));

  448. 

  449.     for (int i = 0; i < 9; i++) {

  450.         int k = 0;

  451.         for (int j = 0; j < 22; j++) {

  452.             ff_band_index_long[i][j] = k;

  453.             k += ff_band_size_long[i][j] >> 1;

  454.         }

  455.         ff_band_index_long[i][22] = k;

  456.     }

  457. 

  458.     for (int i = 0; i < 4; i++) {

  459.         if (ff_mpa_quant_bits[i] < 0) {

  460.             for (int j = 0; j < (1 << (-ff_mpa_quant_bits[i] + 1)); j++) {

  461.                 int val1, val2, val3, steps;

  462.                 int val = j;

  463.                 steps   = ff_mpa_quant_steps[i];

  464.                 val1    = val % steps;

  465.                 val    /= steps;

  466.                 val2    = val % steps;

  467.                 val3    = val / steps;

  468.                 ff_division_tabs[i][j] = val1 + (val2 << 4) + (val3 << 8);

  469.             }

  470.         }

  471.     }

  472. }

  473. 

  474. av_cold void ff_mpegaudiodec_common_init_static(void)

  475. {

  476.     static AVOnce init_static_once = AV_ONCE_INIT;

  477. 

  478.     ff_thread_once(&init_static_once, mpegaudiodec_common_init_static);

  479. }