Mercurial > hg > pmhd
diff ffmpeg/libavcodec/qcelpdata.h @ 10:6840f77b83aa
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| author | Yading Song <yading.song@eecs.qmul.ac.uk> |
|---|---|
| date | Sun, 21 Apr 2013 10:55:35 +0200 |
| parents | |
| children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ffmpeg/libavcodec/qcelpdata.h Sun Apr 21 10:55:35 2013 +0200 @@ -0,0 +1,552 @@ +/* + * QCELP decoder + * Copyright (c) 2007 Reynaldo H. Verdejo Pinochet + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVCODEC_QCELPDATA_H +#define AVCODEC_QCELPDATA_H + +/** + * @file + * Data tables for the QCELP decoder + * @author Reynaldo H. Verdejo Pinochet + * @remark FFmpeg merging spearheaded by Kenan Gillet + * @remark Development mentored by Benjamin Larson + */ + +#include <stddef.h> +#include <stdint.h> +#include "libavutil/common.h" + +/** + * QCELP unpacked data frame + */ +typedef struct QCELPFrame { +/// @name QCELP excitation codebook parameters +/// @{ + uint8_t cbsign[16]; ///< sign of the codebook gain for each codebook subframe + uint8_t cbgain[16]; ///< unsigned codebook gain for each codebook subframe + uint8_t cindex[16]; ///< codebook index for each codebook subframe +/// @} + +/// @name QCELP pitch prediction parameters +/// @{ + uint8_t plag[4]; ///< pitch lag for each pitch subframe + uint8_t pfrac[4]; ///< fractional pitch lag for each pitch subframe + uint8_t pgain[4]; ///< pitch gain for each pitch subframe +/// @} + + /** + * line spectral pair frequencies (LSP) for RATE_OCTAVE, + * line spectral pair frequencies grouped into five vectors + * of dimension two (LSPV) for other rates + */ + uint8_t lspv[10]; + + /** + * reserved bits only present in bitrate 1, 1/4 and 1/8 packets + */ + uint8_t reserved; +} QCELPFrame; + +/** + * pre-calculated table for hammsinc function + * Only half of the table is needed because of symmetry. + * + * TIA/EIA/IS-733 2.4.5.2-2/3 + */ +static const float qcelp_hammsinc_table[4] = { -0.006822, 0.041249, -0.143459, 0.588863}; + +typedef struct QCELPBitmap { + uint8_t index; /**< index into the QCELPContext structure */ + uint8_t bitpos; /**< position of the lowest bit in the value's byte */ + uint8_t bitlen; /**< number of bits to read */ +} QCELPBitmap; + +#define QCELP_OF(variable, bit, len) {offsetof(QCELPFrame, variable), bit, len} + +/** + * bitmap unpacking tables for RATE_FULL + * + * TIA/EIA/IS-733 Table 2.4.7.1-1 + */ +static const QCELPBitmap qcelp_rate_full_bitmap[] = { + // start on bit + QCELP_OF(lspv [ 2], 0, 3), // 265 + QCELP_OF(lspv [ 1], 0, 7), // 262 + QCELP_OF(lspv [ 0], 0, 6), // 255 + QCELP_OF(lspv [ 4], 0, 6), // 249 + QCELP_OF(lspv [ 3], 0, 6), // 243 + QCELP_OF(lspv [ 2], 3, 4), // 237 + QCELP_OF(cbsign[ 0], 0, 1), // 233 + QCELP_OF(cbgain[ 0], 0, 4), // 232 + QCELP_OF(pfrac [ 0], 0, 1), // 228 + QCELP_OF(plag [ 0], 0, 7), // 227 + QCELP_OF(pgain [ 0], 0, 3), // 220 + QCELP_OF(cindex[ 1], 0, 4), // 217 + QCELP_OF(cbsign[ 1], 0, 1), // 213 + QCELP_OF(cbgain[ 1], 0, 4), // 212 + QCELP_OF(cindex[ 0], 0, 7), // 208 + QCELP_OF(cbgain[ 3], 0, 1), // 201 + QCELP_OF(cindex[ 2], 0, 7), // 200 + QCELP_OF(cbsign[ 2], 0, 1), // 193 + QCELP_OF(cbgain[ 2], 0, 4), // 192 + QCELP_OF(cindex[ 1], 4, 3), // 188 + QCELP_OF(plag [ 1], 0, 3), // 185 + QCELP_OF(pgain [ 1], 0, 3), // 182 + QCELP_OF(cindex[ 3], 0, 7), // 179 + QCELP_OF(cbsign[ 3], 0, 1), // 172 + QCELP_OF(cbgain[ 3], 1, 2), // 171 + QCELP_OF(cindex[ 4], 0, 6), // 169 + QCELP_OF(cbsign[ 4], 0, 1), // 163 + QCELP_OF(cbgain[ 4], 0, 4), // 162 + QCELP_OF(pfrac [ 1], 0, 1), // 158 + QCELP_OF(plag [ 1], 3, 4), // 157 + QCELP_OF(cbgain[ 6], 0, 3), // 153 + QCELP_OF(cindex[ 5], 0, 7), // 150 + QCELP_OF(cbsign[ 5], 0, 1), // 143 + QCELP_OF(cbgain[ 5], 0, 4), // 142 + QCELP_OF(cindex[ 4], 6, 1), // 138 + QCELP_OF(cindex[ 7], 0, 3), // 137 + QCELP_OF(cbsign[ 7], 0, 1), // 134 + QCELP_OF(cbgain[ 7], 0, 3), // 133 + QCELP_OF(cindex[ 6], 0, 7), // 130 + QCELP_OF(cbsign[ 6], 0, 1), // 123 + QCELP_OF(cbgain[ 6], 3, 1), // 122 + QCELP_OF(cbgain[ 8], 0, 1), // 121 + QCELP_OF(pfrac [ 2], 0, 1), // 120 + QCELP_OF(plag [ 2], 0, 7), // 119 + QCELP_OF(pgain [ 2], 0, 3), // 112 + QCELP_OF(cindex[ 7], 3, 4), // 109 + QCELP_OF(cbsign[ 9], 0, 1), // 105 + QCELP_OF(cbgain[ 9], 0, 4), // 104 + QCELP_OF(cindex[ 8], 0, 7), // 100 + QCELP_OF(cbsign[ 8], 0, 1), // 93 + QCELP_OF(cbgain[ 8], 1, 3), // 92 + QCELP_OF(cindex[10], 0, 4), // 89 + QCELP_OF(cbsign[10], 0, 1), // 85 + QCELP_OF(cbgain[10], 0, 4), // 84 + QCELP_OF(cindex[ 9], 0, 7), // 80 + QCELP_OF(pgain [ 3], 0, 2), // 73 + QCELP_OF(cindex[11], 0, 7), // 71 + QCELP_OF(cbsign[11], 0, 1), // 64 + QCELP_OF(cbgain[11], 0, 3), // 63 + QCELP_OF(cindex[10], 4, 3), // 60 + QCELP_OF(cindex[12], 0, 2), // 57 + QCELP_OF(cbsign[12], 0, 1), // 55 + QCELP_OF(cbgain[12], 0, 4), // 54 + QCELP_OF(pfrac [ 3], 0, 1), // 50 + QCELP_OF(plag [ 3], 0, 7), // 49 + QCELP_OF(pgain [ 3], 2, 1), // 42 + QCELP_OF(cindex[13], 0, 6), // 41 + QCELP_OF(cbsign[13], 0, 1), // 35 + QCELP_OF(cbgain[13], 0, 4), // 34 + QCELP_OF(cindex[12], 2, 5), // 30 + QCELP_OF(cbgain[15], 0, 3), // 25 + QCELP_OF(cindex[14], 0, 7), // 22 + QCELP_OF(cbsign[14], 0, 1), // 15 + QCELP_OF(cbgain[14], 0, 4), // 14 + QCELP_OF(cindex[13], 6, 1), // 10 + QCELP_OF(reserved, 0, 2), // 9 + QCELP_OF(cindex[15], 0, 7), // 7 + QCELP_OF(cbsign[15], 0, 1) // 0 +}; + +/** + * bitmap unpacking tables for RATE_HALF + * + * TIA/EIA/IS-733 Table 2.4.7.2-1 + */ +static const QCELPBitmap qcelp_rate_half_bitmap[] = { + // start on bit + QCELP_OF(lspv [2], 0, 3), // 123 + QCELP_OF(lspv [1], 0, 7), // 120 + QCELP_OF(lspv [0], 0, 6), // 113 + QCELP_OF(lspv [4], 0, 6), // 107 + QCELP_OF(lspv [3], 0, 6), // 101 + QCELP_OF(lspv [2], 3, 4), // 95 + QCELP_OF(cbsign[0], 0, 1), // 91 + QCELP_OF(cbgain[0], 0, 4), // 90 + QCELP_OF(pfrac [0], 0, 1), // 86 + QCELP_OF(plag [0], 0, 7), // 85 + QCELP_OF(pgain [0], 0, 3), // 78 + QCELP_OF(plag [1], 0, 6), // 75 + QCELP_OF(pgain [1], 0, 3), // 69 + QCELP_OF(cindex[0], 0, 7), // 66 + QCELP_OF(pgain [2], 0, 2), // 59 + QCELP_OF(cindex[1], 0, 7), // 57 + QCELP_OF(cbsign[1], 0, 1), // 50 + QCELP_OF(cbgain[1], 0, 4), // 49 + QCELP_OF(pfrac [1], 0, 1), // 45 + QCELP_OF(plag [1], 6, 1), // 44 + QCELP_OF(cindex[2], 0, 2), // 43 + QCELP_OF(cbsign[2], 0, 1), // 41 + QCELP_OF(cbgain[2], 0, 4), // 40 + QCELP_OF(pfrac [2], 0, 1), // 36 + QCELP_OF(plag [2], 0, 7), // 35 + QCELP_OF(pgain [2], 2, 1), // 28 + QCELP_OF(pfrac [3], 0, 1), // 27 + QCELP_OF(plag [3], 0, 7), // 26 + QCELP_OF(pgain [3], 0, 3), // 19 + QCELP_OF(cindex[2], 2, 5), // 16 + QCELP_OF(cindex[3], 0, 7), // 11 + QCELP_OF(cbsign[3], 0, 1), // 4 + QCELP_OF(cbgain[3], 0, 4) // 3 +}; + +/** + * bitmap unpacking tables for RATE_QUARTER + * + * TIA/EIA/IS-733 Table 2.4.7.3-1 + */ +static const QCELPBitmap qcelp_rate_quarter_bitmap[] = { + // start on bit + QCELP_OF(lspv [2], 0, 3), // 53 + QCELP_OF(lspv [1], 0, 7), // 50 + QCELP_OF(lspv [0], 0, 6), // 43 + QCELP_OF(lspv [4], 0, 6), // 37 + QCELP_OF(lspv [3], 0, 6), // 31 + QCELP_OF(lspv [2], 3, 4), // 25 + QCELP_OF(cbgain[3], 0, 4), // 21 + QCELP_OF(cbgain[2], 0, 4), // 17 + QCELP_OF(cbgain[1], 0, 4), // 13 + QCELP_OF(cbgain[0], 0, 4), // 9 + QCELP_OF(reserved, 0, 2), // 5 + QCELP_OF(cbgain[4], 0, 4) // 3 +}; + +/** + * bitmap unpacking tables for RATE_OCTAVE + * + * trick: CBSEED is written into QCELPContext.cbsign[15], + * which is not used for RATE_OCTAVE. + * CBSEED is only used to ensure the occurrence of random bit + * patterns in the 16 first bits that are used as the seed. + * + * TIA/EIA/IS-733 Table 2.4.7.4-1 + */ +static const QCELPBitmap qcelp_rate_octave_bitmap[] = { + // start on bit + QCELP_OF(cbsign[15], 3, 1), // 19 + QCELP_OF(lspv [0], 0, 1), // 18 + QCELP_OF(lspv [1], 0, 1), // 17 + QCELP_OF(lspv [2], 0, 1), // 16 + QCELP_OF(cbsign[15], 2, 1), // 15 + QCELP_OF(lspv [3], 0, 1), // 14 + QCELP_OF(lspv [4], 0, 1), // 13 + QCELP_OF(lspv [5], 0, 1), // 12 + QCELP_OF(cbsign[15], 1, 1), // 11 + QCELP_OF(lspv [6], 0, 1), // 10 + QCELP_OF(lspv [7], 0, 1), // 9 + QCELP_OF(lspv [8], 0, 1), // 8 + QCELP_OF(cbsign[15], 0, 1), // 7 + QCELP_OF(lspv [9], 0, 1), // 6 + QCELP_OF(cbgain [0], 0, 2), // 5 + QCELP_OF(reserved, 0, 4) // 3 +}; + +/** + * position of the bitmapping data for each packet type in + * the QCELPContext + */ +static const QCELPBitmap * const qcelp_unpacking_bitmaps_per_rate[5] = { + NULL, ///< for SILENCE rate + qcelp_rate_octave_bitmap, + qcelp_rate_quarter_bitmap, + qcelp_rate_half_bitmap, + qcelp_rate_full_bitmap, +}; + +static const uint16_t qcelp_unpacking_bitmaps_lengths[5] = { + 0, ///< for SILENCE rate + FF_ARRAY_ELEMS(qcelp_rate_octave_bitmap), + FF_ARRAY_ELEMS(qcelp_rate_quarter_bitmap), + FF_ARRAY_ELEMS(qcelp_rate_half_bitmap), + FF_ARRAY_ELEMS(qcelp_rate_full_bitmap), +}; + +typedef uint16_t qcelp_vector[2]; + +/** + * LSP vector quantization tables in x*10000 form + * + * TIA/EIA/IS-733 tables 2.4.3.2.6.3-1 through 2.4.3.2.6.3-5 + */ + +static const qcelp_vector qcelp_lspvq1[64]= { +{ 327, 118},{ 919, 111},{ 427, 440},{1327, 185}, +{ 469, 50},{1272, 91},{ 892, 59},{1771, 193}, +{ 222, 158},{1100, 127},{ 827, 55},{ 978, 791}, +{ 665, 47},{ 700,1401},{ 670, 859},{1913,1048}, +{ 471, 215},{1046, 125},{ 645, 298},{1599, 160}, +{ 593, 39},{1187, 462},{ 749, 341},{1520, 511}, +{ 290, 792},{ 909, 362},{ 753, 81},{1111,1058}, +{ 519, 253},{ 828, 839},{ 685, 541},{1421,1258}, +{ 386, 130},{ 962, 119},{ 542, 387},{1431, 185}, +{ 526, 51},{1175, 260},{ 831, 167},{1728, 510}, +{ 273, 437},{1172, 113},{ 771, 144},{1122, 751}, +{ 619, 119},{ 492,1276},{ 658, 695},{1882, 615}, +{ 415, 200},{1018, 88},{ 681, 339},{1436, 325}, +{ 555, 122},{1042, 485},{ 826, 345},{1374, 743}, +{ 383,1018},{1005, 358},{ 704, 86},{1301, 586}, +{ 597, 241},{ 832, 621},{ 555, 573},{1504, 839}}; + +static const qcelp_vector qcelp_lspvq2[128]= { +{ 255, 293},{ 904, 219},{ 151,1211},{1447, 498}, +{ 470, 253},{1559, 177},{1547, 994},{2394, 242}, +{ 91, 813},{ 857, 590},{ 934,1326},{1889, 282}, +{ 813, 472},{1057,1494},{ 450,3315},{2163,1895}, +{ 538, 532},{1399, 218},{ 146,1552},{1755, 626}, +{ 822, 202},{1299, 663},{ 706,1732},{2656, 401}, +{ 418, 745},{ 762,1038},{ 583,1748},{1746,1285}, +{ 527,1169},{1314, 830},{ 556,2116},{1073,2321}, +{ 297, 570},{ 981, 403},{ 468,1103},{1740, 243}, +{ 725, 179},{1255, 474},{1374,1362},{1922, 912}, +{ 285, 947},{ 930, 700},{ 593,1372},{1909, 576}, +{ 588, 916},{1110,1116},{ 224,2719},{1633,2220}, +{ 402, 520},{1061, 448},{ 402,1352},{1499, 775}, +{ 664, 589},{1081, 727},{ 801,2206},{2165,1157}, +{ 566, 802},{ 911,1116},{ 306,1703},{1792, 836}, +{ 655, 999},{1061,1038},{ 298,2089},{1110,1753}, +{ 361, 311},{ 970, 239},{ 265,1231},{1495, 573}, +{ 566, 262},{1569, 293},{1341,1144},{2271, 544}, +{ 214, 877},{ 847, 719},{ 794,1384},{2067, 274}, +{ 703, 688},{1099,1306},{ 391,2947},{2024,1670}, +{ 471, 525},{1245, 290},{ 264,1557},{1568, 807}, +{ 718, 399},{1193, 685},{ 883,1594},{2729, 764}, +{ 500, 754},{ 809,1108},{ 541,1648},{1523,1385}, +{ 614,1196},{1209, 847},{ 345,2242},{1442,1747}, +{ 199, 560},{1092, 194},{ 349,1253},{1653, 507}, +{ 625, 354},{1376, 431},{1187,1465},{2164, 872}, +{ 360, 974},{1008, 698},{ 704,1346},{2114, 452}, +{ 720, 816},{1240,1089},{ 439,2475},{1498,2040}, +{ 336, 718},{1213, 187},{ 451,1450},{1368, 885}, +{ 592, 578},{1131, 531},{ 861,1855},{1764,1500}, +{ 444, 970},{ 935, 903},{ 424,1687},{1633,1102}, +{ 793, 897},{1060, 897},{ 185,2011},{1205,1855}}; + +static const qcelp_vector qcelp_lspvq3[128]= { +{ 225, 283},{1296, 355},{ 543, 343},{2073, 274}, +{ 204,1099},{1562, 523},{1388, 161},{2784, 274}, +{ 112, 849},{1870, 175},{1189, 160},{1490,1088}, +{ 969,1115},{ 659,3322},{1158,1073},{3183,1363}, +{ 517, 223},{1740, 223},{ 704, 387},{2637, 234}, +{ 692,1005},{1287,1610},{ 952, 532},{2393, 646}, +{ 490, 552},{1619, 657},{ 845, 670},{1784,2280}, +{ 191,1775},{ 272,2868},{ 942, 952},{2628,1479}, +{ 278, 579},{1565, 218},{ 814, 180},{2379, 187}, +{ 276,1444},{1199,1223},{1200, 349},{3009, 307}, +{ 312, 844},{1898, 306},{ 863, 470},{1685,1241}, +{ 513,1727},{ 711,2233},{1085, 864},{3398, 527}, +{ 414, 440},{1356, 612},{ 964, 147},{2173, 738}, +{ 465,1292},{ 877,1749},{1104, 689},{2105,1311}, +{ 580, 864},{1895, 752},{ 652, 609},{1485,1699}, +{ 514,1400},{ 386,2131},{ 933, 798},{2473, 986}, +{ 334, 360},{1375, 398},{ 621, 276},{2183, 280}, +{ 311,1114},{1382, 807},{1284, 175},{2605, 636}, +{ 230, 816},{1739, 408},{1074, 176},{1619,1120}, +{ 784,1371},{ 448,3050},{1189, 880},{3039,1165}, +{ 424, 241},{1672, 186},{ 815, 333},{2432, 324}, +{ 584,1029},{1137,1546},{1015, 585},{2198, 995}, +{ 574, 581},{1746, 647},{ 733, 740},{1938,1737}, +{ 347,1710},{ 373,2429},{ 787,1061},{2439,1438}, +{ 185, 536},{1489, 178},{ 703, 216},{2178, 487}, +{ 154,1421},{1414, 994},{1103, 352},{3072, 473}, +{ 408, 819},{2055, 168},{ 998, 354},{1917,1140}, +{ 665,1799},{ 993,2213},{1234, 631},{3003, 762}, +{ 373, 620},{1518, 425},{ 913, 300},{1966, 836}, +{ 402,1185},{ 948,1385},{1121, 555},{1802,1509}, +{ 474, 886},{1888, 610},{ 739, 585},{1231,2379}, +{ 661,1335},{ 205,2211},{ 823, 822},{2480,1179}}; + +static const qcelp_vector qcelp_lspvq4[64]= { +{ 348, 311},{ 812,1145},{ 552, 461},{1826, 263}, +{ 601, 675},{1730, 172},{1523, 193},{2449, 277}, +{ 334, 668},{ 805,1441},{1319, 207},{1684, 910}, +{ 582,1318},{1403,1098},{ 979, 832},{2700,1359}, +{ 624, 228},{1292, 979},{ 800, 195},{2226, 285}, +{ 730, 862},{1537, 601},{1115, 509},{2720, 354}, +{ 218,1167},{1212,1538},{1074, 247},{1674,1710}, +{ 322,2142},{1263, 777},{ 981, 556},{2119,1710}, +{ 193, 596},{1035, 957},{ 694, 397},{1997, 253}, +{ 743, 603},{1584, 321},{1346, 346},{2221, 708}, +{ 451, 732},{1040,1415},{1184, 230},{1853, 919}, +{ 310,1661},{1625, 706},{ 856, 843},{2902, 702}, +{ 467, 348},{1108,1048},{ 859, 306},{1964, 463}, +{ 560,1013},{1425, 533},{1142, 634},{2391, 879}, +{ 397,1084},{1345,1700},{ 976, 248},{1887,1189}, +{ 644,2087},{1262, 603},{ 877, 550},{2203,1307}}; + +static const qcelp_vector qcelp_lspvq5[64]= { +{ 360, 222},{ 820,1097},{ 601, 319},{1656, 198}, +{ 604, 513},{1552, 141},{1391, 155},{2474, 261}, +{ 269, 785},{1463, 646},{1123, 191},{2015, 223}, +{ 785, 844},{1202,1011},{ 980, 807},{3014, 793}, +{ 570, 180},{1135,1382},{ 778, 256},{1901, 179}, +{ 807, 622},{1461, 458},{1231, 178},{2028, 821}, +{ 387, 927},{1496,1004},{ 888, 392},{2246, 341}, +{ 295,1462},{1156, 694},{1022, 473},{2226,1364}, +{ 210, 478},{1029,1020},{ 722, 181},{1730, 251}, +{ 730, 488},{1465, 293},{1303, 326},{2595, 387}, +{ 458, 584},{1569, 742},{1029, 173},{1910, 495}, +{ 605,1159},{1268, 719},{ 973, 646},{2872, 428}, +{ 443, 334},{ 835,1465},{ 912, 138},{1716, 442}, +{ 620, 778},{1316, 450},{1186, 335},{1446,1665}, +{ 486,1050},{1675,1019},{ 880, 278},{2214, 202}, +{ 539,1564},{1142, 533},{ 984, 391},{2130,1089}}; + +static const qcelp_vector * const qcelp_lspvq[5] = { + qcelp_lspvq1, + qcelp_lspvq2, + qcelp_lspvq3, + qcelp_lspvq4, + qcelp_lspvq5 +}; + +/** + * the final gain scalefactor before clipping into a usable output float + */ +#define QCELP_SCALE 8192. + +/** + * table for computing Ga (decoded linear codebook gain magnitude) + * + * @note The table could fit in int16_t in x*8 form, but it seems + * to be slower on x86 + * + * TIA/EIA/IS-733 2.4.6.2.1-3 + */ + +static const float qcelp_g12ga[61] = { + 1.000/QCELP_SCALE, 1.125/QCELP_SCALE, 1.250/QCELP_SCALE, 1.375/QCELP_SCALE, + 1.625/QCELP_SCALE, 1.750/QCELP_SCALE, 2.000/QCELP_SCALE, 2.250/QCELP_SCALE, + 2.500/QCELP_SCALE, 2.875/QCELP_SCALE, 3.125/QCELP_SCALE, 3.500/QCELP_SCALE, + 4.000/QCELP_SCALE, 4.500/QCELP_SCALE, 5.000/QCELP_SCALE, 5.625/QCELP_SCALE, + 6.250/QCELP_SCALE, 7.125/QCELP_SCALE, 8.000/QCELP_SCALE, 8.875/QCELP_SCALE, + 10.000/QCELP_SCALE, 11.250/QCELP_SCALE, 12.625/QCELP_SCALE, 14.125/QCELP_SCALE, + 15.875/QCELP_SCALE, 17.750/QCELP_SCALE, 20.000/QCELP_SCALE, 22.375/QCELP_SCALE, + 25.125/QCELP_SCALE, 28.125/QCELP_SCALE, 31.625/QCELP_SCALE, 35.500/QCELP_SCALE, + 39.750/QCELP_SCALE, 44.625/QCELP_SCALE, 50.125/QCELP_SCALE, 56.250/QCELP_SCALE, + 63.125/QCELP_SCALE, 70.750/QCELP_SCALE, 79.375/QCELP_SCALE, 89.125/QCELP_SCALE, + 100.000/QCELP_SCALE, 112.250/QCELP_SCALE, 125.875/QCELP_SCALE, 141.250/QCELP_SCALE, + 158.500/QCELP_SCALE, 177.875/QCELP_SCALE, 199.500/QCELP_SCALE, 223.875/QCELP_SCALE, + 251.250/QCELP_SCALE, 281.875/QCELP_SCALE, 316.250/QCELP_SCALE, 354.875/QCELP_SCALE, + 398.125/QCELP_SCALE, 446.625/QCELP_SCALE, 501.125/QCELP_SCALE, 562.375/QCELP_SCALE, + 631.000/QCELP_SCALE, 708.000/QCELP_SCALE, 794.375/QCELP_SCALE, 891.250/QCELP_SCALE, + 1000.000/QCELP_SCALE}; + +/** + * circular codebook for rate 1 frames in x*100 form + * + * TIA/EIA/IS-733 2.4.6.1-2 + */ +static const int16_t qcelp_rate_full_codebook[128] = { + 10, -65, -59, 12, 110, 34, -134, 157, + 104, -84, -34, -115, 23, -101, 3, 45, + -101, -16, -59, 28, -45, 134, -67, 22, + 61, -29, 226, -26, -55, -179, 157, -51, + -220, -93, -37, 60, 118, 74, -48, -95, + -181, 111, 36, -52, -215, 78, -112, 39, + -17, -47, -223, 19, 12, -98, -142, 130, + 54, -127, 21, -12, 39, -48, 12, 128, + 6, -167, 82, -102, -79, 55, -44, 48, + -20, -53, 8, -61, 11, -70, -157, -168, + 20, -56, -74, 78, 33, -63, -173, -2, + -75, -53, -146, 77, 66, -29, 9, -75, + 65, 119, -43, 76, 233, 98, 125, -156, + -27, 78, -9, 170, 176, 143, -148, -7, + 27, -136, 5, 27, 18, 139, 204, 7, + -184, -197, 52, -3, 78, -189, 8, -65 +}; +#define QCELP_RATE_FULL_CODEBOOK_RATIO .01 + +/** + * circular codebook for rate 1/2 frames in x*2 form + * + * TIA/EIA/IS-733 2.4.6.1-1 + */ +static const int8_t qcelp_rate_half_codebook[128] = { + 0, -4, 0, -3, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, -3, -2, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 5, + 0, 0, 0, 0, 0, 0, 4, 0, + 0, 3, 2, 0, 3, 4, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 3, 0, 0, + -3, 3, 0, 0, -2, 0, 3, 0, + 0, 0, 0, 0, 0, 0, -5, 0, + 0, 0, 0, 3, 0, 0, 0, 3, + 0, 0, 0, 0, 0, 0, 0, 4, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 3, 6, -3, -4, 0, -3, -3, + 3, -3, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0 +}; +#define QCELP_RATE_HALF_CODEBOOK_RATIO 0.5 + +/** + * sqrt(1.887) is the maximum of the pseudorandom + * white sequence used to generate the scaled codebook + * vector for bitrate 1/4. + * + * TIA/EIA/IS-733 2.4.8.1.2 + */ +#define QCELP_SQRT1887 1.373681186 + +/** + * table for impulse response of BPF used to filter + * the white excitation for bitrate 1/4 synthesis + * + * Only half the tables are needed because of symmetry. + * + * TIA/EIA/IS-733 2.4.8.1.2-1.1 + */ +static const double qcelp_rnd_fir_coefs[11] = { + -1.344519e-1, 1.735384e-2, -6.905826e-2, 2.434368e-2, + -8.210701e-2, 3.041388e-2, -9.251384e-2, 3.501983e-2, + -9.918777e-2, 3.749518e-2, 8.985137e-1 +}; + +/** + * This spread factor is used, for bitrate 1/8 and I_F_Q, + * to force the LSP frequencies to be at least 80 Hz apart. + * + * TIA/EIA/IS-733 2.4.3.3.2 + */ +#define QCELP_LSP_SPREAD_FACTOR 0.02 + +/** + * predictor coefficient for the conversion of LSP codes + * to LSP frequencies for 1/8 and I_F_Q + * + * TIA/EIA/IS-733 2.4.3.2.7-2 + */ +#define QCELP_LSP_OCTAVE_PREDICTOR 29.0/32 + +/** + * initial coefficient to perform bandwidth expansion on LPC + * + * @note: 0.9883 looks like an approximation of 253/256. + * + * TIA/EIA/IS-733 2.4.3.3.6 6 + */ +#define QCELP_BANDWIDTH_EXPANSION_COEFF 0.9883 + +#endif /* AVCODEC_QCELPDATA_H */