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FFmpeg/libavcodec/qcelpdata.h
Reinhard Tartler 21a19b7912 doxygen: Prefer member groups over grouping into modules 
Before this, almost all module groups have been used for grouping functions
and fields in structures semantically. This causes them to not appear
properly in the file documentation and needlessly clutters up the "Modules"
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Additionally, this commit streamlines some spelling and appearances.
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/*
* QCELP decoder
* Copyright (c) 2007 Reynaldo H. Verdejo Pinochet
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; 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 Libav 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 {
/// @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 {
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), // 7
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 */
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