1/* 2 * QCELP decoder 3 * Copyright (c) 2007 Reynaldo H. Verdejo Pinochet 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#ifndef AVCODEC_QCELPDATA_H 23#define AVCODEC_QCELPDATA_H 24 25/** 26 * @file 27 * Data tables for the QCELP decoder 28 * @author Reynaldo H. Verdejo Pinochet 29 * @remark FFmpeg merging spearheaded by Kenan Gillet 30 * @remark Development mentored by Benjamin Larson 31 */ 32 33#include <stddef.h> 34#include <stdint.h> 35#include "libavutil/common.h" 36 37/** 38 * QCELP unpacked data frame 39 */ 40typedef struct { 41/// @defgroup qcelp_codebook_parameters QCELP excitation codebook parameters 42/// @{ 43 uint8_t cbsign[16]; ///!< sign of the codebook gain for each codebook subframe 44 uint8_t cbgain[16]; ///!< unsigned codebook gain for each codebook subframe 45 uint8_t cindex[16]; ///!< codebook index for each codebook subframe 46/// @} 47 48/// @defgroup qcelp_pitch_parameters QCELP pitch prediction parameters 49/// @{ 50 uint8_t plag[4]; ///!< pitch lag for each pitch subframe 51 uint8_t pfrac[4]; ///!< fractional pitch lag for each pitch subframe 52 uint8_t pgain[4]; ///!< pitch gain for each pitch subframe 53/// @} 54 55 /** 56 * line spectral pair frequencies (LSP) for RATE_OCTAVE, 57 * line spectral pair frequencies grouped into five vectors 58 * of dimension two (LSPV) for other rates 59 */ 60 uint8_t lspv[10]; 61 62 /** 63 * reserved bits only present in bitrate 1, 1/4 and 1/8 packets 64 */ 65 uint8_t reserved; 66} QCELPFrame; 67 68/** 69 * pre-calculated table for hammsinc function 70 * Only half of the table is needed because of symmetry. 71 * 72 * TIA/EIA/IS-733 2.4.5.2-2/3 73 */ 74static const float qcelp_hammsinc_table[4] = { -0.006822, 0.041249, -0.143459, 0.588863}; 75 76typedef struct { 77 uint8_t index; /*!< index into the QCELPContext structure */ 78 uint8_t bitpos; /*!< position of the lowest bit in the value's byte */ 79 uint8_t bitlen; /*!< number of bits to read */ 80} QCELPBitmap; 81 82#define QCELP_OF(variable, bit, len) {offsetof(QCELPFrame, variable), bit, len} 83 84/** 85 * bitmap unpacking tables for RATE_FULL 86 * 87 * TIA/EIA/IS-733 Table 2.4.7.1-1 88 */ 89static const QCELPBitmap qcelp_rate_full_bitmap[] = { 90 // start on bit 91 QCELP_OF(lspv [ 2], 0, 3), // 265 92 QCELP_OF(lspv [ 1], 0, 7), // 262 93 QCELP_OF(lspv [ 0], 0, 6), // 255 94 QCELP_OF(lspv [ 4], 0, 6), // 249 95 QCELP_OF(lspv [ 3], 0, 6), // 243 96 QCELP_OF(lspv [ 2], 3, 4), // 237 97 QCELP_OF(cbsign[ 0], 0, 1), // 233 98 QCELP_OF(cbgain[ 0], 0, 4), // 232 99 QCELP_OF(pfrac [ 0], 0, 1), // 228 100 QCELP_OF(plag [ 0], 0, 7), // 227 101 QCELP_OF(pgain [ 0], 0, 3), // 220 102 QCELP_OF(cindex[ 1], 0, 4), // 217 103 QCELP_OF(cbsign[ 1], 0, 1), // 213 104 QCELP_OF(cbgain[ 1], 0, 4), // 212 105 QCELP_OF(cindex[ 0], 0, 7), // 208 106 QCELP_OF(cbgain[ 3], 0, 1), // 201 107 QCELP_OF(cindex[ 2], 0, 7), // 200 108 QCELP_OF(cbsign[ 2], 0, 1), // 193 109 QCELP_OF(cbgain[ 2], 0, 4), // 192 110 QCELP_OF(cindex[ 1], 4, 3), // 188 111 QCELP_OF(plag [ 1], 0, 3), // 185 112 QCELP_OF(pgain [ 1], 0, 3), // 182 113 QCELP_OF(cindex[ 3], 0, 7), // 179 114 QCELP_OF(cbsign[ 3], 0, 1), // 172 115 QCELP_OF(cbgain[ 3], 1, 2), // 171 116 QCELP_OF(cindex[ 4], 0, 6), // 169 117 QCELP_OF(cbsign[ 4], 0, 1), // 163 118 QCELP_OF(cbgain[ 4], 0, 4), // 162 119 QCELP_OF(pfrac [ 1], 0, 1), // 158 120 QCELP_OF(plag [ 1], 3, 4), // 157 121 QCELP_OF(cbgain[ 6], 0, 3), // 153 122 QCELP_OF(cindex[ 5], 0, 7), // 150 123 QCELP_OF(cbsign[ 5], 0, 1), // 143 124 QCELP_OF(cbgain[ 5], 0, 4), // 142 125 QCELP_OF(cindex[ 4], 6, 1), // 138 126 QCELP_OF(cindex[ 7], 0, 3), // 137 127 QCELP_OF(cbsign[ 7], 0, 1), // 134 128 QCELP_OF(cbgain[ 7], 0, 3), // 133 129 QCELP_OF(cindex[ 6], 0, 7), // 130 130 QCELP_OF(cbsign[ 6], 0, 1), // 123 131 QCELP_OF(cbgain[ 6], 3, 1), // 122 132 QCELP_OF(cbgain[ 8], 0, 1), // 121 133 QCELP_OF(pfrac [ 2], 0, 1), // 120 134 QCELP_OF(plag [ 2], 0, 7), // 119 135 QCELP_OF(pgain [ 2], 0, 3), // 112 136 QCELP_OF(cindex[ 7], 3, 4), // 109 137 QCELP_OF(cbsign[ 9], 0, 1), // 105 138 QCELP_OF(cbgain[ 9], 0, 4), // 104 139 QCELP_OF(cindex[ 8], 0, 7), // 100 140 QCELP_OF(cbsign[ 8], 0, 1), // 93 141 QCELP_OF(cbgain[ 8], 1, 3), // 92 142 QCELP_OF(cindex[10], 0, 4), // 89 143 QCELP_OF(cbsign[10], 0, 1), // 85 144 QCELP_OF(cbgain[10], 0, 4), // 84 145 QCELP_OF(cindex[ 9], 0, 7), // 80 146 QCELP_OF(pgain [ 3], 0, 2), // 73 147 QCELP_OF(cindex[11], 0, 7), // 71 148 QCELP_OF(cbsign[11], 0, 1), // 64 149 QCELP_OF(cbgain[11], 0, 3), // 63 150 QCELP_OF(cindex[10], 4, 3), // 60 151 QCELP_OF(cindex[12], 0, 2), // 57 152 QCELP_OF(cbsign[12], 0, 1), // 55 153 QCELP_OF(cbgain[12], 0, 4), // 54 154 QCELP_OF(pfrac [ 3], 0, 1), // 50 155 QCELP_OF(plag [ 3], 0, 7), // 49 156 QCELP_OF(pgain [ 3], 2, 1), // 42 157 QCELP_OF(cindex[13], 0, 6), // 41 158 QCELP_OF(cbsign[13], 0, 1), // 35 159 QCELP_OF(cbgain[13], 0, 4), // 34 160 QCELP_OF(cindex[12], 2, 5), // 30 161 QCELP_OF(cbgain[15], 0, 3), // 25 162 QCELP_OF(cindex[14], 0, 7), // 22 163 QCELP_OF(cbsign[14], 0, 1), // 15 164 QCELP_OF(cbgain[14], 0, 4), // 14 165 QCELP_OF(cindex[13], 6, 1), // 10 166 QCELP_OF(reserved, 0, 2), // 9 167 QCELP_OF(cindex[15], 0, 7), // 7 168 QCELP_OF(cbsign[15], 0, 1) // 0 169}; 170 171/** 172 * bitmap unpacking tables for RATE_HALF 173 * 174 * TIA/EIA/IS-733 Table 2.4.7.2-1 175 */ 176static const QCELPBitmap qcelp_rate_half_bitmap[] = { 177 // start on bit 178 QCELP_OF(lspv [2], 0, 3), // 123 179 QCELP_OF(lspv [1], 0, 7), // 120 180 QCELP_OF(lspv [0], 0, 6), // 113 181 QCELP_OF(lspv [4], 0, 6), // 107 182 QCELP_OF(lspv [3], 0, 6), // 101 183 QCELP_OF(lspv [2], 3, 4), // 95 184 QCELP_OF(cbsign[0], 0, 1), // 91 185 QCELP_OF(cbgain[0], 0, 4), // 90 186 QCELP_OF(pfrac [0], 0, 1), // 86 187 QCELP_OF(plag [0], 0, 7), // 85 188 QCELP_OF(pgain [0], 0, 3), // 78 189 QCELP_OF(plag [1], 0, 6), // 75 190 QCELP_OF(pgain [1], 0, 3), // 69 191 QCELP_OF(cindex[0], 0, 7), // 66 192 QCELP_OF(pgain [2], 0, 2), // 59 193 QCELP_OF(cindex[1], 0, 7), // 57 194 QCELP_OF(cbsign[1], 0, 1), // 50 195 QCELP_OF(cbgain[1], 0, 4), // 49 196 QCELP_OF(pfrac [1], 0, 1), // 45 197 QCELP_OF(plag [1], 6, 1), // 44 198 QCELP_OF(cindex[2], 0, 2), // 43 199 QCELP_OF(cbsign[2], 0, 1), // 41 200 QCELP_OF(cbgain[2], 0, 4), // 40 201 QCELP_OF(pfrac [2], 0, 1), // 36 202 QCELP_OF(plag [2], 0, 7), // 35 203 QCELP_OF(pgain [2], 2, 1), // 28 204 QCELP_OF(pfrac [3], 0, 1), // 27 205 QCELP_OF(plag [3], 0, 7), // 26 206 QCELP_OF(pgain [3], 0, 3), // 19 207 QCELP_OF(cindex[2], 2, 5), // 16 208 QCELP_OF(cindex[3], 0, 7), // 11 209 QCELP_OF(cbsign[3], 0, 1), // 4 210 QCELP_OF(cbgain[3], 0, 4) // 3 211}; 212 213/** 214 * bitmap unpacking tables for RATE_QUARTER 215 * 216 * TIA/EIA/IS-733 Table 2.4.7.3-1 217 */ 218static const QCELPBitmap qcelp_rate_quarter_bitmap[] = { 219 // start on bit 220 QCELP_OF(lspv [2], 0, 3), // 53 221 QCELP_OF(lspv [1], 0, 7), // 50 222 QCELP_OF(lspv [0], 0, 6), // 43 223 QCELP_OF(lspv [4], 0, 6), // 37 224 QCELP_OF(lspv [3], 0, 6), // 31 225 QCELP_OF(lspv [2], 3, 4), // 25 226 QCELP_OF(cbgain[3], 0, 4), // 21 227 QCELP_OF(cbgain[2], 0, 4), // 17 228 QCELP_OF(cbgain[1], 0, 4), // 13 229 QCELP_OF(cbgain[0], 0, 4), // 9 230 QCELP_OF(reserved, 0, 2), // 5 231 QCELP_OF(cbgain[4], 0, 4) // 3 232}; 233 234/** 235 * bitmap unpacking tables for RATE_OCTAVE 236 * 237 * trick: CBSEED is written into QCELPContext.cbsign[15], 238 * which is not used for RATE_OCTAVE. 239 * CBSEED is only used to ensure the occurrence of random bit 240 * patterns in the 16 first bits that are used as the seed. 241 * 242 * TIA/EIA/IS-733 Table 2.4.7.4-1 243 */ 244static const QCELPBitmap qcelp_rate_octave_bitmap[] = { 245 // start on bit 246 QCELP_OF(cbsign[15], 3, 1), // 19 247 QCELP_OF(lspv [0], 0, 1), // 18 248 QCELP_OF(lspv [1], 0, 1), // 17 249 QCELP_OF(lspv [2], 0, 1), // 16 250 QCELP_OF(cbsign[15], 2, 1), // 15 251 QCELP_OF(lspv [3], 0, 1), // 14 252 QCELP_OF(lspv [4], 0, 1), // 13 253 QCELP_OF(lspv [5], 0, 1), // 12 254 QCELP_OF(cbsign[15], 1, 1), // 11 255 QCELP_OF(lspv [6], 0, 1), // 10 256 QCELP_OF(lspv [7], 0, 1), // 9 257 QCELP_OF(lspv [8], 0, 1), // 8 258 QCELP_OF(cbsign[15], 0, 1), // 7 259 QCELP_OF(lspv [9], 0, 1), // 6 260 QCELP_OF(cbgain [0], 0, 2), // 7 261 QCELP_OF(reserved, 0, 4) // 3 262}; 263 264/** 265 * position of the bitmapping data for each packet type in 266 * the QCELPContext 267 */ 268static const QCELPBitmap * const qcelp_unpacking_bitmaps_per_rate[5] = { 269 NULL, ///!< for SILENCE rate 270 qcelp_rate_octave_bitmap, 271 qcelp_rate_quarter_bitmap, 272 qcelp_rate_half_bitmap, 273 qcelp_rate_full_bitmap, 274}; 275 276static const uint16_t qcelp_unpacking_bitmaps_lengths[5] = { 277 0, ///!< for SILENCE rate 278 FF_ARRAY_ELEMS(qcelp_rate_octave_bitmap), 279 FF_ARRAY_ELEMS(qcelp_rate_quarter_bitmap), 280 FF_ARRAY_ELEMS(qcelp_rate_half_bitmap), 281 FF_ARRAY_ELEMS(qcelp_rate_full_bitmap), 282}; 283 284typedef uint16_t qcelp_vector[2]; 285 286/** 287 * LSP vector quantization tables in x*10000 form 288 * 289 * TIA/EIA/IS-733 tables 2.4.3.2.6.3-1 through 2.4.3.2.6.3-5 290 */ 291 292static const qcelp_vector qcelp_lspvq1[64]= { 293{ 327, 118},{ 919, 111},{ 427, 440},{1327, 185}, 294{ 469, 50},{1272, 91},{ 892, 59},{1771, 193}, 295{ 222, 158},{1100, 127},{ 827, 55},{ 978, 791}, 296{ 665, 47},{ 700,1401},{ 670, 859},{1913,1048}, 297{ 471, 215},{1046, 125},{ 645, 298},{1599, 160}, 298{ 593, 39},{1187, 462},{ 749, 341},{1520, 511}, 299{ 290, 792},{ 909, 362},{ 753, 81},{1111,1058}, 300{ 519, 253},{ 828, 839},{ 685, 541},{1421,1258}, 301{ 386, 130},{ 962, 119},{ 542, 387},{1431, 185}, 302{ 526, 51},{1175, 260},{ 831, 167},{1728, 510}, 303{ 273, 437},{1172, 113},{ 771, 144},{1122, 751}, 304{ 619, 119},{ 492,1276},{ 658, 695},{1882, 615}, 305{ 415, 200},{1018, 88},{ 681, 339},{1436, 325}, 306{ 555, 122},{1042, 485},{ 826, 345},{1374, 743}, 307{ 383,1018},{1005, 358},{ 704, 86},{1301, 586}, 308{ 597, 241},{ 832, 621},{ 555, 573},{1504, 839}}; 309 310static const qcelp_vector qcelp_lspvq2[128]= { 311{ 255, 293},{ 904, 219},{ 151,1211},{1447, 498}, 312{ 470, 253},{1559, 177},{1547, 994},{2394, 242}, 313{ 91, 813},{ 857, 590},{ 934,1326},{1889, 282}, 314{ 813, 472},{1057,1494},{ 450,3315},{2163,1895}, 315{ 538, 532},{1399, 218},{ 146,1552},{1755, 626}, 316{ 822, 202},{1299, 663},{ 706,1732},{2656, 401}, 317{ 418, 745},{ 762,1038},{ 583,1748},{1746,1285}, 318{ 527,1169},{1314, 830},{ 556,2116},{1073,2321}, 319{ 297, 570},{ 981, 403},{ 468,1103},{1740, 243}, 320{ 725, 179},{1255, 474},{1374,1362},{1922, 912}, 321{ 285, 947},{ 930, 700},{ 593,1372},{1909, 576}, 322{ 588, 916},{1110,1116},{ 224,2719},{1633,2220}, 323{ 402, 520},{1061, 448},{ 402,1352},{1499, 775}, 324{ 664, 589},{1081, 727},{ 801,2206},{2165,1157}, 325{ 566, 802},{ 911,1116},{ 306,1703},{1792, 836}, 326{ 655, 999},{1061,1038},{ 298,2089},{1110,1753}, 327{ 361, 311},{ 970, 239},{ 265,1231},{1495, 573}, 328{ 566, 262},{1569, 293},{1341,1144},{2271, 544}, 329{ 214, 877},{ 847, 719},{ 794,1384},{2067, 274}, 330{ 703, 688},{1099,1306},{ 391,2947},{2024,1670}, 331{ 471, 525},{1245, 290},{ 264,1557},{1568, 807}, 332{ 718, 399},{1193, 685},{ 883,1594},{2729, 764}, 333{ 500, 754},{ 809,1108},{ 541,1648},{1523,1385}, 334{ 614,1196},{1209, 847},{ 345,2242},{1442,1747}, 335{ 199, 560},{1092, 194},{ 349,1253},{1653, 507}, 336{ 625, 354},{1376, 431},{1187,1465},{2164, 872}, 337{ 360, 974},{1008, 698},{ 704,1346},{2114, 452}, 338{ 720, 816},{1240,1089},{ 439,2475},{1498,2040}, 339{ 336, 718},{1213, 187},{ 451,1450},{1368, 885}, 340{ 592, 578},{1131, 531},{ 861,1855},{1764,1500}, 341{ 444, 970},{ 935, 903},{ 424,1687},{1633,1102}, 342{ 793, 897},{1060, 897},{ 185,2011},{1205,1855}}; 343 344static const qcelp_vector qcelp_lspvq3[128]= { 345{ 225, 283},{1296, 355},{ 543, 343},{2073, 274}, 346{ 204,1099},{1562, 523},{1388, 161},{2784, 274}, 347{ 112, 849},{1870, 175},{1189, 160},{1490,1088}, 348{ 969,1115},{ 659,3322},{1158,1073},{3183,1363}, 349{ 517, 223},{1740, 223},{ 704, 387},{2637, 234}, 350{ 692,1005},{1287,1610},{ 952, 532},{2393, 646}, 351{ 490, 552},{1619, 657},{ 845, 670},{1784,2280}, 352{ 191,1775},{ 272,2868},{ 942, 952},{2628,1479}, 353{ 278, 579},{1565, 218},{ 814, 180},{2379, 187}, 354{ 276,1444},{1199,1223},{1200, 349},{3009, 307}, 355{ 312, 844},{1898, 306},{ 863, 470},{1685,1241}, 356{ 513,1727},{ 711,2233},{1085, 864},{3398, 527}, 357{ 414, 440},{1356, 612},{ 964, 147},{2173, 738}, 358{ 465,1292},{ 877,1749},{1104, 689},{2105,1311}, 359{ 580, 864},{1895, 752},{ 652, 609},{1485,1699}, 360{ 514,1400},{ 386,2131},{ 933, 798},{2473, 986}, 361{ 334, 360},{1375, 398},{ 621, 276},{2183, 280}, 362{ 311,1114},{1382, 807},{1284, 175},{2605, 636}, 363{ 230, 816},{1739, 408},{1074, 176},{1619,1120}, 364{ 784,1371},{ 448,3050},{1189, 880},{3039,1165}, 365{ 424, 241},{1672, 186},{ 815, 333},{2432, 324}, 366{ 584,1029},{1137,1546},{1015, 585},{2198, 995}, 367{ 574, 581},{1746, 647},{ 733, 740},{1938,1737}, 368{ 347,1710},{ 373,2429},{ 787,1061},{2439,1438}, 369{ 185, 536},{1489, 178},{ 703, 216},{2178, 487}, 370{ 154,1421},{1414, 994},{1103, 352},{3072, 473}, 371{ 408, 819},{2055, 168},{ 998, 354},{1917,1140}, 372{ 665,1799},{ 993,2213},{1234, 631},{3003, 762}, 373{ 373, 620},{1518, 425},{ 913, 300},{1966, 836}, 374{ 402,1185},{ 948,1385},{1121, 555},{1802,1509}, 375{ 474, 886},{1888, 610},{ 739, 585},{1231,2379}, 376{ 661,1335},{ 205,2211},{ 823, 822},{2480,1179}}; 377 378static const qcelp_vector qcelp_lspvq4[64]= { 379{ 348, 311},{ 812,1145},{ 552, 461},{1826, 263}, 380{ 601, 675},{1730, 172},{1523, 193},{2449, 277}, 381{ 334, 668},{ 805,1441},{1319, 207},{1684, 910}, 382{ 582,1318},{1403,1098},{ 979, 832},{2700,1359}, 383{ 624, 228},{1292, 979},{ 800, 195},{2226, 285}, 384{ 730, 862},{1537, 601},{1115, 509},{2720, 354}, 385{ 218,1167},{1212,1538},{1074, 247},{1674,1710}, 386{ 322,2142},{1263, 777},{ 981, 556},{2119,1710}, 387{ 193, 596},{1035, 957},{ 694, 397},{1997, 253}, 388{ 743, 603},{1584, 321},{1346, 346},{2221, 708}, 389{ 451, 732},{1040,1415},{1184, 230},{1853, 919}, 390{ 310,1661},{1625, 706},{ 856, 843},{2902, 702}, 391{ 467, 348},{1108,1048},{ 859, 306},{1964, 463}, 392{ 560,1013},{1425, 533},{1142, 634},{2391, 879}, 393{ 397,1084},{1345,1700},{ 976, 248},{1887,1189}, 394{ 644,2087},{1262, 603},{ 877, 550},{2203,1307}}; 395 396static const qcelp_vector qcelp_lspvq5[64]= { 397{ 360, 222},{ 820,1097},{ 601, 319},{1656, 198}, 398{ 604, 513},{1552, 141},{1391, 155},{2474, 261}, 399{ 269, 785},{1463, 646},{1123, 191},{2015, 223}, 400{ 785, 844},{1202,1011},{ 980, 807},{3014, 793}, 401{ 570, 180},{1135,1382},{ 778, 256},{1901, 179}, 402{ 807, 622},{1461, 458},{1231, 178},{2028, 821}, 403{ 387, 927},{1496,1004},{ 888, 392},{2246, 341}, 404{ 295,1462},{1156, 694},{1022, 473},{2226,1364}, 405{ 210, 478},{1029,1020},{ 722, 181},{1730, 251}, 406{ 730, 488},{1465, 293},{1303, 326},{2595, 387}, 407{ 458, 584},{1569, 742},{1029, 173},{1910, 495}, 408{ 605,1159},{1268, 719},{ 973, 646},{2872, 428}, 409{ 443, 334},{ 835,1465},{ 912, 138},{1716, 442}, 410{ 620, 778},{1316, 450},{1186, 335},{1446,1665}, 411{ 486,1050},{1675,1019},{ 880, 278},{2214, 202}, 412{ 539,1564},{1142, 533},{ 984, 391},{2130,1089}}; 413 414static const qcelp_vector * const qcelp_lspvq[5] = { 415 qcelp_lspvq1, 416 qcelp_lspvq2, 417 qcelp_lspvq3, 418 qcelp_lspvq4, 419 qcelp_lspvq5 420}; 421 422/** 423 * the final gain scalefactor before clipping into a usable output float 424 */ 425#define QCELP_SCALE 8192. 426 427/** 428 * table for computing Ga (decoded linear codebook gain magnitude) 429 * 430 * @note The table could fit in int16_t in x*8 form, but it seems 431 * to be slower on x86 432 * 433 * TIA/EIA/IS-733 2.4.6.2.1-3 434 */ 435 436static const float qcelp_g12ga[61] = { 437 1.000/QCELP_SCALE, 1.125/QCELP_SCALE, 1.250/QCELP_SCALE, 1.375/QCELP_SCALE, 438 1.625/QCELP_SCALE, 1.750/QCELP_SCALE, 2.000/QCELP_SCALE, 2.250/QCELP_SCALE, 439 2.500/QCELP_SCALE, 2.875/QCELP_SCALE, 3.125/QCELP_SCALE, 3.500/QCELP_SCALE, 440 4.000/QCELP_SCALE, 4.500/QCELP_SCALE, 5.000/QCELP_SCALE, 5.625/QCELP_SCALE, 441 6.250/QCELP_SCALE, 7.125/QCELP_SCALE, 8.000/QCELP_SCALE, 8.875/QCELP_SCALE, 442 10.000/QCELP_SCALE, 11.250/QCELP_SCALE, 12.625/QCELP_SCALE, 14.125/QCELP_SCALE, 443 15.875/QCELP_SCALE, 17.750/QCELP_SCALE, 20.000/QCELP_SCALE, 22.375/QCELP_SCALE, 444 25.125/QCELP_SCALE, 28.125/QCELP_SCALE, 31.625/QCELP_SCALE, 35.500/QCELP_SCALE, 445 39.750/QCELP_SCALE, 44.625/QCELP_SCALE, 50.125/QCELP_SCALE, 56.250/QCELP_SCALE, 446 63.125/QCELP_SCALE, 70.750/QCELP_SCALE, 79.375/QCELP_SCALE, 89.125/QCELP_SCALE, 447 100.000/QCELP_SCALE, 112.250/QCELP_SCALE, 125.875/QCELP_SCALE, 141.250/QCELP_SCALE, 448 158.500/QCELP_SCALE, 177.875/QCELP_SCALE, 199.500/QCELP_SCALE, 223.875/QCELP_SCALE, 449 251.250/QCELP_SCALE, 281.875/QCELP_SCALE, 316.250/QCELP_SCALE, 354.875/QCELP_SCALE, 450 398.125/QCELP_SCALE, 446.625/QCELP_SCALE, 501.125/QCELP_SCALE, 562.375/QCELP_SCALE, 451 631.000/QCELP_SCALE, 708.000/QCELP_SCALE, 794.375/QCELP_SCALE, 891.250/QCELP_SCALE, 452 1000.000/QCELP_SCALE}; 453 454/** 455 * circular codebook for rate 1 frames in x*100 form 456 * 457 * TIA/EIA/IS-733 2.4.6.1-2 458 */ 459static const int16_t qcelp_rate_full_codebook[128] = { 460 10, -65, -59, 12, 110, 34, -134, 157, 461 104, -84, -34, -115, 23, -101, 3, 45, 462 -101, -16, -59, 28, -45, 134, -67, 22, 463 61, -29, 226, -26, -55, -179, 157, -51, 464 -220, -93, -37, 60, 118, 74, -48, -95, 465 -181, 111, 36, -52, -215, 78, -112, 39, 466 -17, -47, -223, 19, 12, -98, -142, 130, 467 54, -127, 21, -12, 39, -48, 12, 128, 468 6, -167, 82, -102, -79, 55, -44, 48, 469 -20, -53, 8, -61, 11, -70, -157, -168, 470 20, -56, -74, 78, 33, -63, -173, -2, 471 -75, -53, -146, 77, 66, -29, 9, -75, 472 65, 119, -43, 76, 233, 98, 125, -156, 473 -27, 78, -9, 170, 176, 143, -148, -7, 474 27, -136, 5, 27, 18, 139, 204, 7, 475 -184, -197, 52, -3, 78, -189, 8, -65 476}; 477#define QCELP_RATE_FULL_CODEBOOK_RATIO .01 478 479/** 480 * circular codebook for rate 1/2 frames in x*2 form 481 * 482 * TIA/EIA/IS-733 2.4.6.1-1 483 */ 484static const int8_t qcelp_rate_half_codebook[128] = { 485 0, -4, 0, -3, 0, 0, 0, 0, 486 0, 0, 0, 0, 0, 0, 0, 0, 487 0, -3, -2, 0, 0, 0, 0, 0, 488 0, 0, 0, 0, 0, 0, 0, 5, 489 0, 0, 0, 0, 0, 0, 4, 0, 490 0, 3, 2, 0, 3, 4, 0, 0, 491 0, 0, 0, 0, 0, 0, 0, 0, 492 0, 0, 0, 0, 0, 3, 0, 0, 493 -3, 3, 0, 0, -2, 0, 3, 0, 494 0, 0, 0, 0, 0, 0, -5, 0, 495 0, 0, 0, 3, 0, 0, 0, 3, 496 0, 0, 0, 0, 0, 0, 0, 4, 497 0, 0, 0, 0, 0, 0, 0, 0, 498 0, 3, 6, -3, -4, 0, -3, -3, 499 3, -3, 0, 0, 0, 0, 0, 0, 500 0, 0, 0, 0, 0, 0, 0, 0 501}; 502#define QCELP_RATE_HALF_CODEBOOK_RATIO 0.5 503 504/** 505 * sqrt(1.887) is the maximum of the pseudorandom 506 * white sequence used to generate the scaled codebook 507 * vector for bitrate 1/4. 508 * 509 * TIA/EIA/IS-733 2.4.8.1.2 510 */ 511#define QCELP_SQRT1887 1.373681186 512 513/** 514 * table for impulse response of BPF used to filter 515 * the white excitation for bitrate 1/4 synthesis 516 * 517 * Only half the tables are needed because of symmetry. 518 * 519 * TIA/EIA/IS-733 2.4.8.1.2-1.1 520 */ 521static const double qcelp_rnd_fir_coefs[11] = { 522 -1.344519e-1, 1.735384e-2, -6.905826e-2, 2.434368e-2, 523 -8.210701e-2, 3.041388e-2, -9.251384e-2, 3.501983e-2, 524 -9.918777e-2, 3.749518e-2, 8.985137e-1 525}; 526 527/** 528 * This spread factor is used, for bitrate 1/8 and I_F_Q, 529 * to force the LSP frequencies to be at least 80 Hz apart. 530 * 531 * TIA/EIA/IS-733 2.4.3.3.2 532 */ 533#define QCELP_LSP_SPREAD_FACTOR 0.02 534 535/** 536 * predictor coefficient for the conversion of LSP codes 537 * to LSP frequencies for 1/8 and I_F_Q 538 * 539 * TIA/EIA/IS-733 2.4.3.2.7-2 540 */ 541#define QCELP_LSP_OCTAVE_PREDICTOR 29.0/32 542 543/** 544 * initial coefficient to perform bandwidth expansion on LPC 545 * 546 * @note: 0.9883 looks like an approximation of 253/256. 547 * 548 * TIA/EIA/IS-733 2.4.3.3.6 6 549 */ 550#define QCELP_BANDWIDTH_EXPANSION_COEFF 0.9883 551 552#endif /* AVCODEC_QCELPDATA_H */ 553