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FFmpeg/libavcodec/libac3/tables.h

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  1. /* 

  2.  *    parse.c

  3.  *

  4.  *	Copyright (C) Aaron Holtzman - May 1999

  5.  *

  6.  *  This file is part of ac3dec, a free Dolby AC-3 stream decoder.

  7.  *	

  8.  *  ac3dec is free software; you can redistribute it and/or modify

  9.  *  it under the terms of the GNU General Public License as published by

  10.  *  the Free Software Foundation; either version 2, or (at your option)

  11.  *  any later version.

  12.  *   

  13.  *  ac3dec is distributed in the hope that it will be useful,

  14.  *  but WITHOUT ANY WARRANTY; without even the implied warranty of

  15.  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  16.  *  GNU General Public License for more details.

  17.  *   

  18.  *  You should have received a copy of the GNU General Public License

  19.  *  along with GNU Make; see the file COPYING.  If not, write to

  20.  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 

  21.  *

  22.  *

  23.  */

  24. 

  25. static int8_t exp_1[128] = {

  26.     -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,

  27.     -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  28.      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

  29.      1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,

  30.      2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  31.     25,25,25

  32. };

  33. static int8_t exp_2[128] = {

  34.     -2,-2,-2,-2,-2,-1,-1,-1,-1,-1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2,

  35.     -2,-2,-2,-2,-2,-1,-1,-1,-1,-1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2,

  36.     -2,-2,-2,-2,-2,-1,-1,-1,-1,-1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2,

  37.     -2,-2,-2,-2,-2,-1,-1,-1,-1,-1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2,

  38.     -2,-2,-2,-2,-2,-1,-1,-1,-1,-1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2,

  39.     25,25,25

  40. };

  41. static int8_t exp_3[128] = {

  42.     -2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,

  43.     -2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,

  44.     -2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,

  45.     -2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,

  46.     -2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,-2,-1, 0, 1, 2,

  47.     25,25,25

  48. };

  49. 

  50. #define Q0 ((-2 << 15) / 3.0)

  51. #define Q1 (0)

  52. #define Q2 ((2 << 15) / 3.0)

  53. 

  54. static const float q_1_0[ 32 ] = {

  55.     Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,

  56.     Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,

  57.     Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,

  58.     0,0,0,0,0

  59. };

  60. 

  61. static const float q_1_1[ 32 ] = {

  62.     Q0,Q0,Q0,Q1,Q1,Q1,Q2,Q2,Q2,

  63.     Q0,Q0,Q0,Q1,Q1,Q1,Q2,Q2,Q2,

  64.     Q0,Q0,Q0,Q1,Q1,Q1,Q2,Q2,Q2,

  65.     0,0,0,0,0

  66. };

  67. 

  68. static const float q_1_2[ 32 ] = {

  69.     Q0,Q1,Q2,Q0,Q1,Q2,Q0,Q1,Q2,

  70.     Q0,Q1,Q2,Q0,Q1,Q2,Q0,Q1,Q2,

  71.     Q0,Q1,Q2,Q0,Q1,Q2,Q0,Q1,Q2,

  72.     0,0,0,0,0

  73. };

  74. 

  75. #undef Q0

  76. #undef Q1

  77. #undef Q2

  78. 

  79. #define Q0 ((-4 << 15) / 5.0)

  80. #define Q1 ((-2 << 15) / 5.0)

  81. #define Q2 (0)

  82. #define Q3 ((2 << 15) / 5.0)

  83. #define Q4 ((4 << 15) / 5.0)

  84. 

  85. static const float q_2_0[ 128 ] = {

  86.     Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,Q0,

  87.     Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,Q1,

  88.     Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,Q2,

  89.     Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,Q3,

  90.     Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,Q4,

  91.     0,0,0

  92. };

  93. 

  94. static const float q_2_1[ 128 ] = {

  95.     Q0,Q0,Q0,Q0,Q0,Q1,Q1,Q1,Q1,Q1,Q2,Q2,Q2,Q2,Q2,Q3,Q3,Q3,Q3,Q3,Q4,Q4,Q4,Q4,Q4,

  96.     Q0,Q0,Q0,Q0,Q0,Q1,Q1,Q1,Q1,Q1,Q2,Q2,Q2,Q2,Q2,Q3,Q3,Q3,Q3,Q3,Q4,Q4,Q4,Q4,Q4,

  97.     Q0,Q0,Q0,Q0,Q0,Q1,Q1,Q1,Q1,Q1,Q2,Q2,Q2,Q2,Q2,Q3,Q3,Q3,Q3,Q3,Q4,Q4,Q4,Q4,Q4,

  98.     Q0,Q0,Q0,Q0,Q0,Q1,Q1,Q1,Q1,Q1,Q2,Q2,Q2,Q2,Q2,Q3,Q3,Q3,Q3,Q3,Q4,Q4,Q4,Q4,Q4,

  99.     Q0,Q0,Q0,Q0,Q0,Q1,Q1,Q1,Q1,Q1,Q2,Q2,Q2,Q2,Q2,Q3,Q3,Q3,Q3,Q3,Q4,Q4,Q4,Q4,Q4,

  100.     0,0,0

  101. };

  102. 

  103. static const float q_2_2[ 128 ] = {

  104.     Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,

  105.     Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,

  106.     Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,

  107.     Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,

  108.     Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,Q0,Q1,Q2,Q3,Q4,

  109.     0,0,0

  110. };

  111. 

  112. #undef Q0

  113. #undef Q1

  114. #undef Q2

  115. #undef Q3

  116. #undef Q4

  117. 

  118. static const float q_3[8] = {

  119.     (-6 << 15)/7.0, (-4 << 15)/7.0, (-2 << 15)/7.0, 0,

  120.     ( 2 << 15)/7.0, ( 4 << 15)/7.0, ( 6 << 15)/7.0, 0

  121. };

  122. 

  123. #define Q0 ((-10 << 15) / 11.0)

  124. #define Q1 ((-8 << 15) / 11.0)

  125. #define Q2 ((-6 << 15) / 11.0)

  126. #define Q3 ((-4 << 15) / 11.0)

  127. #define Q4 ((-2 << 15) / 11.0)

  128. #define Q5 (0)

  129. #define Q6 ((2 << 15) / 11.0)

  130. #define Q7 ((4 << 15) / 11.0)

  131. #define Q8 ((6 << 15) / 11.0)

  132. #define Q9 ((8 << 15) / 11.0)

  133. #define QA ((10 << 15) / 11.0)

  134. 

  135. static const float q_4_0[ 128 ] = {

  136.     Q0, Q0, Q0, Q0, Q0, Q0, Q0, Q0, Q0, Q0, Q0,

  137.     Q1, Q1, Q1, Q1, Q1, Q1, Q1, Q1, Q1, Q1, Q1,

  138.     Q2, Q2, Q2, Q2, Q2, Q2, Q2, Q2, Q2, Q2, Q2,

  139.     Q3, Q3, Q3, Q3, Q3, Q3, Q3, Q3, Q3, Q3, Q3,

  140.     Q4, Q4, Q4, Q4, Q4, Q4, Q4, Q4, Q4, Q4, Q4,

  141.     Q5, Q5, Q5, Q5, Q5, Q5, Q5, Q5, Q5, Q5, Q5,

  142.     Q6, Q6, Q6, Q6, Q6, Q6, Q6, Q6, Q6, Q6, Q6,

  143.     Q7, Q7, Q7, Q7, Q7, Q7, Q7, Q7, Q7, Q7, Q7,

  144.     Q8, Q8, Q8, Q8, Q8, Q8, Q8, Q8, Q8, Q8, Q8,

  145.     Q9, Q9, Q9, Q9, Q9, Q9, Q9, Q9, Q9, Q9, Q9,

  146.     QA, QA, QA, QA, QA, QA, QA, QA, QA, QA, QA,

  147.     0,  0,  0,  0,  0,  0,  0

  148. };

  149. 

  150. static const float q_4_1[ 128 ] = {

  151.     Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA,

  152.     Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA,

  153.     Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA,

  154.     Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA,

  155.     Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA,

  156.     Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA,

  157.     Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA,

  158.     Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA,

  159.     Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA,

  160.     Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA,

  161.     Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, QA,

  162.     0,  0,  0,  0,  0,  0,  0

  163. };

  164. 

  165. #undef Q0

  166. #undef Q1

  167. #undef Q2

  168. #undef Q3

  169. #undef Q4

  170. #undef Q5

  171. #undef Q6

  172. #undef Q7

  173. #undef Q8

  174. #undef Q9

  175. #undef QA

  176. 

  177. static const float q_5[16] = {

  178.     (-14 << 15)/15.0,(-12 << 15)/15.0,(-10 << 15)/15.0,

  179.     ( -8 << 15)/15.0,( -6 << 15)/15.0,( -4 << 15)/15.0,

  180.     ( -2 << 15)/15.0,   0            ,(  2 << 15)/15.0,

  181.     (  4 << 15)/15.0,(  6 << 15)/15.0,(  8 << 15)/15.0,

  182.     ( 10 << 15)/15.0,( 12 << 15)/15.0,( 14 << 15)/15.0,

  183.     0

  184. };

  185. 

  186. static const uint32_t u32_scale_factors[25] = 

  187. {

  188. 	0x38000000, //2 ^ -(0 + 15)

  189. 	0x37800000, //2 ^ -(1 + 15)

  190. 	0x37000000, //2 ^ -(2 + 15)

  191. 	0x36800000, //2 ^ -(3 + 15)

  192. 	0x36000000, //2 ^ -(4 + 15)

  193. 	0x35800000, //2 ^ -(5 + 15)

  194. 	0x35000000, //2 ^ -(6 + 15)

  195. 	0x34800000, //2 ^ -(7 + 15)

  196. 	0x34000000, //2 ^ -(8 + 15)

  197. 	0x33800000, //2 ^ -(9 + 15)

  198. 	0x33000000, //2 ^ -(10 + 15)

  199. 	0x32800000, //2 ^ -(11 + 15)

  200. 	0x32000000, //2 ^ -(12 + 15)

  201. 	0x31800000, //2 ^ -(13 + 15)

  202. 	0x31000000, //2 ^ -(14 + 15)

  203. 	0x30800000, //2 ^ -(15 + 15)

  204. 	0x30000000, //2 ^ -(16 + 15)

  205. 	0x2f800000, //2 ^ -(17 + 15)

  206. 	0x2f000000, //2 ^ -(18 + 15)

  207. 	0x2e800000, //2 ^ -(19 + 15)

  208. 	0x2e000000, //2 ^ -(20 + 15)

  209. 	0x2d800000, //2 ^ -(21 + 15)

  210. 	0x2d000000, //2 ^ -(22 + 15)

  211. 	0x2c800000, //2 ^ -(23 + 15)

  212. 	0x2c000000  //2 ^ -(24 + 15)

  213. };

  214. 

  215. static float * scale_factor = (float *) u32_scale_factors;

  216. 

  217. static const uint16_t dither_lut[256] = {

  218.     0x0000, 0xa011, 0xe033, 0x4022, 0x6077, 0xc066, 0x8044, 0x2055,

  219.     0xc0ee, 0x60ff, 0x20dd, 0x80cc, 0xa099, 0x0088, 0x40aa, 0xe0bb,

  220.     0x21cd, 0x81dc, 0xc1fe, 0x61ef, 0x41ba, 0xe1ab, 0xa189, 0x0198,

  221.     0xe123, 0x4132, 0x0110, 0xa101, 0x8154, 0x2145, 0x6167, 0xc176,

  222.     0x439a, 0xe38b, 0xa3a9, 0x03b8, 0x23ed, 0x83fc, 0xc3de, 0x63cf,

  223.     0x8374, 0x2365, 0x6347, 0xc356, 0xe303, 0x4312, 0x0330, 0xa321,

  224.     0x6257, 0xc246, 0x8264, 0x2275, 0x0220, 0xa231, 0xe213, 0x4202,

  225.     0xa2b9, 0x02a8, 0x428a, 0xe29b, 0xc2ce, 0x62df, 0x22fd, 0x82ec,

  226.     0x8734, 0x2725, 0x6707, 0xc716, 0xe743, 0x4752, 0x0770, 0xa761,

  227.     0x47da, 0xe7cb, 0xa7e9, 0x07f8, 0x27ad, 0x87bc, 0xc79e, 0x678f,

  228.     0xa6f9, 0x06e8, 0x46ca, 0xe6db, 0xc68e, 0x669f, 0x26bd, 0x86ac,

  229.     0x6617, 0xc606, 0x8624, 0x2635, 0x0660, 0xa671, 0xe653, 0x4642,

  230.     0xc4ae, 0x64bf, 0x249d, 0x848c, 0xa4d9, 0x04c8, 0x44ea, 0xe4fb,

  231.     0x0440, 0xa451, 0xe473, 0x4462, 0x6437, 0xc426, 0x8404, 0x2415,

  232.     0xe563, 0x4572, 0x0550, 0xa541, 0x8514, 0x2505, 0x6527, 0xc536,

  233.     0x258d, 0x859c, 0xc5be, 0x65af, 0x45fa, 0xe5eb, 0xa5c9, 0x05d8,

  234.     0xae79, 0x0e68, 0x4e4a, 0xee5b, 0xce0e, 0x6e1f, 0x2e3d, 0x8e2c,

  235.     0x6e97, 0xce86, 0x8ea4, 0x2eb5, 0x0ee0, 0xaef1, 0xeed3, 0x4ec2,

  236.     0x8fb4, 0x2fa5, 0x6f87, 0xcf96, 0xefc3, 0x4fd2, 0x0ff0, 0xafe1,

  237.     0x4f5a, 0xef4b, 0xaf69, 0x0f78, 0x2f2d, 0x8f3c, 0xcf1e, 0x6f0f,

  238.     0xede3, 0x4df2, 0x0dd0, 0xadc1, 0x8d94, 0x2d85, 0x6da7, 0xcdb6,

  239.     0x2d0d, 0x8d1c, 0xcd3e, 0x6d2f, 0x4d7a, 0xed6b, 0xad49, 0x0d58,

  240.     0xcc2e, 0x6c3f, 0x2c1d, 0x8c0c, 0xac59, 0x0c48, 0x4c6a, 0xec7b,

  241.     0x0cc0, 0xacd1, 0xecf3, 0x4ce2, 0x6cb7, 0xcca6, 0x8c84, 0x2c95,

  242.     0x294d, 0x895c, 0xc97e, 0x696f, 0x493a, 0xe92b, 0xa909, 0x0918,

  243.     0xe9a3, 0x49b2, 0x0990, 0xa981, 0x89d4, 0x29c5, 0x69e7, 0xc9f6,

  244.     0x0880, 0xa891, 0xe8b3, 0x48a2, 0x68f7, 0xc8e6, 0x88c4, 0x28d5,

  245.     0xc86e, 0x687f, 0x285d, 0x884c, 0xa819, 0x0808, 0x482a, 0xe83b,

  246.     0x6ad7, 0xcac6, 0x8ae4, 0x2af5, 0x0aa0, 0xaab1, 0xea93, 0x4a82,

  247.     0xaa39, 0x0a28, 0x4a0a, 0xea1b, 0xca4e, 0x6a5f, 0x2a7d, 0x8a6c,

  248.     0x4b1a, 0xeb0b, 0xab29, 0x0b38, 0x2b6d, 0x8b7c, 0xcb5e, 0x6b4f,

  249.     0x8bf4, 0x2be5, 0x6bc7, 0xcbd6, 0xeb83, 0x4b92, 0x0bb0, 0xaba1

  250. };