Fix bandwith vs. bandwiDth typo.
[libav.git] / libavcodec / qcelpdata.h
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 libavcodec/qcelpdata.h
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 */
40 typedef 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 */
74 static const float qcelp_hammsinc_table[4] = { -0.006822, 0.041249, -0.143459, 0.588863};
75
76 typedef 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 */
89 static 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 */
176 static 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 */
218 static 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 */
244 static 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 */
268 static 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
276 static 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
284 typedef 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
292 static 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
310 static 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
344 static 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
378 static 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
396 static 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
414 static 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 * the upper boundary of the clipping, depends on QCELP_SCALE
429 */
430 #define QCELP_CLIP_UPPER_BOUND (8191.75/8192.)
431
432 /**
433 * the lower boundary of the clipping, depends on QCELP_SCALE
434 */
435 #define QCELP_CLIP_LOWER_BOUND -1.
436
437 /**
438 * table for computing Ga (decoded linear codebook gain magnitude)
439 *
440 * @note The table could fit in int16_t in x*8 form, but it seems
441 * to be slower on x86
442 *
443 * TIA/EIA/IS-733 2.4.6.2.1-3
444 */
445
446 static const float qcelp_g12ga[61] = {
447 1.000/QCELP_SCALE, 1.125/QCELP_SCALE, 1.250/QCELP_SCALE, 1.375/QCELP_SCALE,
448 1.625/QCELP_SCALE, 1.750/QCELP_SCALE, 2.000/QCELP_SCALE, 2.250/QCELP_SCALE,
449 2.500/QCELP_SCALE, 2.875/QCELP_SCALE, 3.125/QCELP_SCALE, 3.500/QCELP_SCALE,
450 4.000/QCELP_SCALE, 4.500/QCELP_SCALE, 5.000/QCELP_SCALE, 5.625/QCELP_SCALE,
451 6.250/QCELP_SCALE, 7.125/QCELP_SCALE, 8.000/QCELP_SCALE, 8.875/QCELP_SCALE,
452 10.000/QCELP_SCALE, 11.250/QCELP_SCALE, 12.625/QCELP_SCALE, 14.125/QCELP_SCALE,
453 15.875/QCELP_SCALE, 17.750/QCELP_SCALE, 20.000/QCELP_SCALE, 22.375/QCELP_SCALE,
454 25.125/QCELP_SCALE, 28.125/QCELP_SCALE, 31.625/QCELP_SCALE, 35.500/QCELP_SCALE,
455 39.750/QCELP_SCALE, 44.625/QCELP_SCALE, 50.125/QCELP_SCALE, 56.250/QCELP_SCALE,
456 63.125/QCELP_SCALE, 70.750/QCELP_SCALE, 79.375/QCELP_SCALE, 89.125/QCELP_SCALE,
457 100.000/QCELP_SCALE, 112.250/QCELP_SCALE, 125.875/QCELP_SCALE, 141.250/QCELP_SCALE,
458 158.500/QCELP_SCALE, 177.875/QCELP_SCALE, 199.500/QCELP_SCALE, 223.875/QCELP_SCALE,
459 251.250/QCELP_SCALE, 281.875/QCELP_SCALE, 316.250/QCELP_SCALE, 354.875/QCELP_SCALE,
460 398.125/QCELP_SCALE, 446.625/QCELP_SCALE, 501.125/QCELP_SCALE, 562.375/QCELP_SCALE,
461 631.000/QCELP_SCALE, 708.000/QCELP_SCALE, 794.375/QCELP_SCALE, 891.250/QCELP_SCALE,
462 1000.000/QCELP_SCALE};
463
464 /**
465 * circular codebook for rate 1 frames in x*100 form
466 *
467 * TIA/EIA/IS-733 2.4.6.1-2
468 */
469 static const int16_t qcelp_rate_full_codebook[128] = {
470 10, -65, -59, 12, 110, 34, -134, 157,
471 104, -84, -34, -115, 23, -101, 3, 45,
472 -101, -16, -59, 28, -45, 134, -67, 22,
473 61, -29, 226, -26, -55, -179, 157, -51,
474 -220, -93, -37, 60, 118, 74, -48, -95,
475 -181, 111, 36, -52, -215, 78, -112, 39,
476 -17, -47, -223, 19, 12, -98, -142, 130,
477 54, -127, 21, -12, 39, -48, 12, 128,
478 6, -167, 82, -102, -79, 55, -44, 48,
479 -20, -53, 8, -61, 11, -70, -157, -168,
480 20, -56, -74, 78, 33, -63, -173, -2,
481 -75, -53, -146, 77, 66, -29, 9, -75,
482 65, 119, -43, 76, 233, 98, 125, -156,
483 -27, 78, -9, 170, 176, 143, -148, -7,
484 27, -136, 5, 27, 18, 139, 204, 7,
485 -184, -197, 52, -3, 78, -189, 8, -65
486 };
487 #define QCELP_RATE_FULL_CODEBOOK_RATIO .01
488
489 /**
490 * circular codebook for rate 1/2 frames in x*2 form
491 *
492 * TIA/EIA/IS-733 2.4.6.1-1
493 */
494 static const int8_t qcelp_rate_half_codebook[128] = {
495 0, -4, 0, -3, 0, 0, 0, 0,
496 0, 0, 0, 0, 0, 0, 0, 0,
497 0, -3, -2, 0, 0, 0, 0, 0,
498 0, 0, 0, 0, 0, 0, 0, 5,
499 0, 0, 0, 0, 0, 0, 4, 0,
500 0, 3, 2, 0, 3, 4, 0, 0,
501 0, 0, 0, 0, 0, 0, 0, 0,
502 0, 0, 0, 0, 0, 3, 0, 0,
503 -3, 3, 0, 0, -2, 0, 3, 0,
504 0, 0, 0, 0, 0, 0, -5, 0,
505 0, 0, 0, 3, 0, 0, 0, 3,
506 0, 0, 0, 0, 0, 0, 0, 4,
507 0, 0, 0, 0, 0, 0, 0, 0,
508 0, 3, 6, -3, -4, 0, -3, -3,
509 3, -3, 0, 0, 0, 0, 0, 0,
510 0, 0, 0, 0, 0, 0, 0, 0
511 };
512 #define QCELP_RATE_HALF_CODEBOOK_RATIO 0.5
513
514 /**
515 * sqrt(1.887) is the maximum of the pseudorandom
516 * white sequence used to generate the scaled codebook
517 * vector for bitrate 1/4.
518 *
519 * TIA/EIA/IS-733 2.4.8.1.2
520 */
521 #define QCELP_SQRT1887 1.373681186
522
523 /**
524 * table for impulse response of BPF used to filter
525 * the white excitation for bitrate 1/4 synthesis
526 *
527 * Only half the tables are needed because of symmetry.
528 *
529 * TIA/EIA/IS-733 2.4.8.1.2-1.1
530 */
531 static const double qcelp_rnd_fir_coefs[11] = {
532 -1.344519e-1, 1.735384e-2, -6.905826e-2, 2.434368e-2,
533 -8.210701e-2, 3.041388e-2, -9.251384e-2, 3.501983e-2,
534 -9.918777e-2, 3.749518e-2, 8.985137e-1
535 };
536
537 /**
538 * This spread factor is used, for bitrate 1/8 and I_F_Q,
539 * to force the LSP frequencies to be at least 80 Hz apart.
540 *
541 * TIA/EIA/IS-733 2.4.3.3.2
542 */
543 #define QCELP_LSP_SPREAD_FACTOR 0.02
544
545 /**
546 * predictor coefficient for the conversion of LSP codes
547 * to LSP frequencies for 1/8 and I_F_Q
548 *
549 * TIA/EIA/IS-733 2.4.3.2.7-2
550 */
551 #define QCELP_LSP_OCTAVE_PREDICTOR 29.0/32
552
553 /**
554 * initial coefficient to perform bandwidth expansion on LPC
555 *
556 * @note: 0.9883 looks like an approximation of 253/256.
557 *
558 * TIA/EIA/IS-733 2.4.3.3.6 6
559 */
560 #define QCELP_BANDWIDTH_EXPANSION_COEFF 0.9883
561
562 #endif /* AVCODEC_QCELPDATA_H */