Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | /* |
| 21 | * Based on implementation found in Carnegie Mellon Speech Group Software |
| 22 | * depository (ftp://ftp.cs.cmu.edu/project/fgdata/index.html). No copyright |
| 23 | * was claimed in the original source codes. |
| 24 | */ |
| 25 | #include <pjmedia/errno.h> |
| 26 | #include <pj/assert.h> |
| 27 | #include <pj/pool.h> |
| 28 | |
| 29 | #include "g722_enc.h" |
| 30 | |
| 31 | #if defined(PJMEDIA_HAS_G722_CODEC) && (PJMEDIA_HAS_G722_CODEC != 0) |
| 32 | |
| 33 | #define SATURATE(v, max, min) \ |
| 34 | if (v>max) v = max; \ |
| 35 | else if (v<min) v = min |
| 36 | |
| 37 | /* QMF tap coefficients */ |
| 38 | const int g722_qmf_coeff[24] = { |
| 39 | 3, -11, -11, 53, 12, -156, |
| 40 | 32, 362, -210, -805, 951, 3876, |
| 41 | 3876, 951, -805, -210, 362, 32, |
| 42 | -156, 12, 53, -11, -11, 3 |
| 43 | }; |
| 44 | |
| 45 | |
| 46 | static int block1l (int xl, int sl, int detl) |
| 47 | { |
| 48 | int il ; |
| 49 | |
| 50 | int i, el, sil, mil, wd, wd1, hdu ; |
| 51 | |
| 52 | static const int q6[32] = { |
| 53 | 0, 35, 72, 110, 150, 190, 233, 276, 323, |
| 54 | 370, 422, 473, 530, 587, 650, 714, 786, |
| 55 | 858, 940, 1023, 1121, 1219, 1339, 1458, |
| 56 | 1612, 1765, 1980, 2195, 2557, 2919, 0, 0 |
| 57 | }; |
| 58 | |
| 59 | static const int iln[32] = { |
| 60 | 0, 63, 62, 31, 30, 29, 28, 27, 26, 25, |
| 61 | 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, |
| 62 | 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 0 |
| 63 | }; |
| 64 | |
| 65 | static const int ilp[32] = { |
| 66 | 0, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, |
| 67 | 51, 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, |
| 68 | 40, 39, 38, 37, 36, 35, 34, 33, 32, 0 |
| 69 | }; |
| 70 | |
| 71 | /* SUBTRA */ |
| 72 | |
| 73 | el = xl - sl ; |
| 74 | SATURATE(el, 32767, -32768); |
| 75 | |
| 76 | /* QUANTL */ |
| 77 | |
| 78 | sil = el >> 15 ; |
| 79 | if (sil == 0 ) wd = el ; |
| 80 | else wd = (32767 - el) & 32767 ; |
| 81 | |
| 82 | mil = 1 ; |
| 83 | |
| 84 | for (i = 1; i < 30; i++) { |
| 85 | hdu = (q6[i] << 3) * detl; |
| 86 | wd1 = (hdu >> 15) ; |
| 87 | if (wd >= wd1) mil = (i + 1) ; |
| 88 | else break ; |
| 89 | } |
| 90 | |
| 91 | if (sil == -1 ) il = iln[mil] ; |
| 92 | else il = ilp[mil] ; |
| 93 | |
| 94 | return (il) ; |
| 95 | } |
| 96 | |
| 97 | static int block2l (int il, int detl) |
| 98 | { |
| 99 | int dlt; |
| 100 | int ril, wd2 ; |
| 101 | static const int qm4[16] = { |
| 102 | 0, -20456, -12896, -8968, |
| 103 | -6288, -4240, -2584, -1200, |
| 104 | 20456, 12896, 8968, 6288, |
| 105 | 4240, 2584, 1200, 0 |
| 106 | }; |
| 107 | |
| 108 | /* INVQAL */ |
| 109 | ril = il >> 2 ; |
| 110 | wd2 = qm4[ril] ; |
| 111 | dlt = (detl * wd2) >> 15 ; |
| 112 | |
| 113 | return (dlt) ; |
| 114 | } |
| 115 | |
| 116 | static int block3l (g722_enc_t *enc, int il) |
| 117 | { |
| 118 | int detl; |
| 119 | int ril, il4, wd, wd1, wd2, wd3, nbpl, depl ; |
| 120 | static int const wl[8] = { |
| 121 | -60, -30, 58, 172, 334, 538, 1198, 3042 |
| 122 | } ; |
| 123 | static int const rl42[16] = { |
| 124 | 0, 7, 6, 5, 4, 3, 2, 1, 7, 6, 5, 4, 3, 2, 1, 0 |
| 125 | }; |
| 126 | static const int ilb[32] = { |
| 127 | 2048, 2093, 2139, 2186, 2233, 2282, 2332, |
| 128 | 2383, 2435, 2489, 2543, 2599, 2656, 2714, |
| 129 | 2774, 2834, 2896, 2960, 3025, 3091, 3158, |
| 130 | 3228, 3298, 3371, 3444, 3520, 3597, 3676, |
| 131 | 3756, 3838, 3922, 4008 |
| 132 | }; |
| 133 | |
| 134 | /* LOGSCL */ |
| 135 | |
| 136 | ril = il >> 2 ; |
| 137 | il4 = rl42[ril] ; |
| 138 | |
| 139 | wd = (enc->nbl * 32512) >> 15 ; |
| 140 | nbpl = wd + wl[il4] ; |
| 141 | |
| 142 | if (nbpl < 0) nbpl = 0 ; |
| 143 | if (nbpl > 18432) nbpl = 18432 ; |
| 144 | |
| 145 | /* SCALEL */ |
| 146 | |
| 147 | wd1 = (nbpl >> 6) & 31 ; |
| 148 | wd2 = nbpl >> 11 ; |
| 149 | if ((8 - wd2) < 0) wd3 = ilb[wd1] << (wd2 - 8) ; |
| 150 | else wd3 = ilb[wd1] >> (8 - wd2) ; |
| 151 | depl = wd3 << 2 ; |
| 152 | |
| 153 | /* DELAYA */ |
| 154 | enc->nbl = nbpl ; |
| 155 | |
| 156 | /* DELAYL */ |
| 157 | detl = depl ; |
| 158 | |
| 159 | #ifdef DEBUG_VERBOSE |
| 160 | printf ("BLOCK3L il=%4d, ril=%4d, il4=%4d, nbl=%4d, wd=%4d, nbpl=%4d\n", |
| 161 | il, ril, il4, enc->nbl, wd, nbpl) ; |
| 162 | printf ("wd1=%4d, wd2=%4d, wd3=%4d, depl=%4d, detl=%4d\n", |
| 163 | wd1, wd2, wd3, depl, detl) ; |
| 164 | #endif |
| 165 | |
| 166 | return (detl) ; |
| 167 | } |
| 168 | |
| 169 | static int block4l (g722_enc_t *enc, int dl) |
| 170 | { |
| 171 | int sl = enc->slow; |
| 172 | int i ; |
| 173 | int wd, wd1, wd2, wd3, wd4, wd5 /*, wd6 */; |
| 174 | |
| 175 | enc->dlt[0] = dl; |
| 176 | |
| 177 | /* RECONS */ |
| 178 | |
| 179 | enc->rlt[0] = sl + enc->dlt[0] ; |
| 180 | SATURATE(enc->rlt[0], 32767, -32768); |
| 181 | |
| 182 | /* PARREC */ |
| 183 | |
| 184 | enc->plt[0] = enc->dlt[0] + enc->szl ; |
| 185 | SATURATE(enc->plt[0], 32767, -32768); |
| 186 | |
| 187 | /* UPPOL2 */ |
| 188 | |
| 189 | enc->sgl[0] = enc->plt[0] >> 15 ; |
| 190 | enc->sgl[1] = enc->plt[1] >> 15 ; |
| 191 | enc->sgl[2] = enc->plt[2] >> 15 ; |
| 192 | |
| 193 | wd1 = enc->al[1] << 2; |
| 194 | SATURATE(wd1, 32767, -32768); |
| 195 | |
| 196 | if ( enc->sgl[0] == enc->sgl[1] ) wd2 = - wd1 ; |
| 197 | else wd2 = wd1 ; |
| 198 | if ( wd2 > 32767 ) wd2 = 32767; |
| 199 | |
| 200 | wd2 = wd2 >> 7 ; |
| 201 | |
| 202 | if ( enc->sgl[0] == enc->sgl[2] ) wd3 = 128 ; |
| 203 | else wd3 = - 128 ; |
| 204 | |
| 205 | wd4 = wd2 + wd3 ; |
| 206 | wd5 = (enc->al[2] * 32512) >> 15 ; |
| 207 | |
| 208 | enc->apl[2] = wd4 + wd5 ; |
| 209 | SATURATE(enc->apl[2], 12288, -12288); |
| 210 | |
| 211 | /* UPPOL1 */ |
| 212 | |
| 213 | enc->sgl[0] = enc->plt[0] >> 15 ; |
| 214 | enc->sgl[1] = enc->plt[1] >> 15 ; |
| 215 | |
| 216 | if ( enc->sgl[0] == enc->sgl[1] ) wd1 = 192 ; |
| 217 | else wd1 = - 192 ; |
| 218 | |
| 219 | wd2 = (enc->al[1] * 32640) >> 15 ; |
| 220 | |
| 221 | enc->apl[1] = wd1 + wd2 ; |
| 222 | SATURATE(enc->apl[1], 32767, -32768); |
| 223 | |
| 224 | wd3 = (15360 - enc->apl[2]) ; |
| 225 | SATURATE(wd3, 32767, -32768); |
| 226 | |
| 227 | if ( enc->apl[1] > wd3) enc->apl[1] = wd3 ; |
| 228 | if ( enc->apl[1] < -wd3) enc->apl[1] = -wd3 ; |
| 229 | |
| 230 | /* UPZERO */ |
| 231 | |
| 232 | if ( enc->dlt[0] == 0 ) wd1 = 0 ; |
| 233 | else wd1 = 128 ; |
| 234 | |
| 235 | enc->sgl[0] = enc->dlt[0] >> 15 ; |
| 236 | |
| 237 | for ( i = 1; i < 7; i++ ) { |
| 238 | enc->sgl[i] = enc->dlt[i] >> 15 ; |
| 239 | if ( enc->sgl[i] == enc->sgl[0] ) wd2 = wd1 ; |
| 240 | else wd2 = - wd1 ; |
| 241 | wd3 = (enc->bl[i] * 32640) >> 15 ; |
| 242 | enc->bpl[i] = wd2 + wd3 ; |
| 243 | SATURATE(enc->bpl[i], 32767, -32768); |
| 244 | } |
| 245 | |
| 246 | /* DELAYA */ |
| 247 | |
| 248 | for ( i = 6; i > 0; i-- ) { |
| 249 | enc->dlt[i] = enc->dlt[i-1] ; |
| 250 | enc->bl[i] = enc->bpl[i] ; |
| 251 | } |
| 252 | |
| 253 | for ( i = 2; i > 0; i-- ) { |
| 254 | enc->rlt[i] = enc->rlt[i-1] ; |
| 255 | enc->plt[i] = enc->plt[i-1] ; |
| 256 | enc->al[i] = enc->apl[i] ; |
| 257 | } |
| 258 | |
| 259 | /* FILTEP */ |
| 260 | |
| 261 | wd1 = enc->rlt[1] + enc->rlt[1]; |
| 262 | SATURATE(wd1, 32767, -32768); |
| 263 | wd1 = ( enc->al[1] * wd1 ) >> 15 ; |
| 264 | |
| 265 | wd2 = enc->rlt[2] + enc->rlt[2]; |
| 266 | SATURATE(wd2, 32767, -32768); |
| 267 | wd2 = ( enc->al[2] * wd2 ) >> 15 ; |
| 268 | |
| 269 | enc->spl = wd1 + wd2 ; |
| 270 | SATURATE(enc->spl, 32767, -32768); |
| 271 | |
| 272 | /* FILTEZ */ |
| 273 | |
| 274 | enc->szl = 0 ; |
| 275 | for (i=6; i>0; i--) { |
| 276 | wd = enc->dlt[i] + enc->dlt[i]; |
| 277 | SATURATE(wd, 32767, -32768); |
| 278 | enc->szl += (enc->bl[i] * wd) >> 15 ; |
| 279 | SATURATE(enc->szl, 32767, -32768); |
| 280 | } |
| 281 | |
| 282 | /* PREDIC */ |
| 283 | |
| 284 | sl = enc->spl + enc->szl ; |
| 285 | SATURATE(sl, 32767, -32768); |
| 286 | |
| 287 | return (sl) ; |
| 288 | } |
| 289 | |
| 290 | static int block1h (int xh, int sh, int deth) |
| 291 | { |
| 292 | int ih ; |
| 293 | |
| 294 | int eh, sih, mih, wd, wd1, hdu ; |
| 295 | |
| 296 | static const int ihn[3] = { 0, 1, 0 } ; |
| 297 | static const int ihp[3] = { 0, 3, 2 } ; |
| 298 | |
| 299 | /* SUBTRA */ |
| 300 | |
| 301 | eh = xh - sh ; |
| 302 | SATURATE(eh, 32767, -32768); |
| 303 | |
| 304 | /* QUANTH */ |
| 305 | |
| 306 | sih = eh >> 15 ; |
| 307 | if (sih == 0 ) wd = eh ; |
| 308 | else wd = (32767 - eh) & 32767 ; |
| 309 | |
| 310 | hdu = (564 << 3) * deth; |
| 311 | wd1 = (hdu >> 15) ; |
| 312 | if (wd >= wd1) mih = 2 ; |
| 313 | else mih = 1 ; |
| 314 | |
| 315 | if (sih == -1 ) ih = ihn[mih] ; |
| 316 | else ih = ihp[mih] ; |
| 317 | |
| 318 | return (ih) ; |
| 319 | } |
| 320 | |
| 321 | static int block2h (int ih, int deth) |
| 322 | { |
| 323 | int dh ; |
| 324 | int wd2 ; |
| 325 | static const int qm2[4] = {-7408, -1616, 7408, 1616}; |
| 326 | |
| 327 | /* INVQAH */ |
| 328 | |
| 329 | wd2 = qm2[ih] ; |
| 330 | dh = (deth * wd2) >> 15 ; |
| 331 | |
| 332 | return (dh) ; |
| 333 | } |
| 334 | |
| 335 | static int block3h (g722_enc_t *enc, int ih) |
| 336 | { |
| 337 | int deth ; |
| 338 | int ih2, wd, wd1, wd2, wd3, nbph, deph ; |
| 339 | static const int wh[3] = {0, -214, 798} ; |
| 340 | static const int rh2[4] = {2, 1, 2, 1} ; |
| 341 | static const int ilb[32] = { |
| 342 | 2048, 2093, 2139, 2186, 2233, 2282, 2332, |
| 343 | 2383, 2435, 2489, 2543, 2599, 2656, 2714, |
| 344 | 2774, 2834, 2896, 2960, 3025, 3091, 3158, |
| 345 | 3228, 3298, 3371, 3444, 3520, 3597, 3676, |
| 346 | 3756, 3838, 3922, 4008 |
| 347 | }; |
| 348 | |
| 349 | /* LOGSCH */ |
| 350 | |
| 351 | ih2 = rh2[ih] ; |
| 352 | wd = (enc->nbh * 32512) >> 15 ; |
| 353 | nbph = wd + wh[ih2] ; |
| 354 | |
| 355 | if (nbph < 0) nbph = 0 ; |
| 356 | if (nbph > 22528) nbph = 22528 ; |
| 357 | |
| 358 | /* SCALEH */ |
| 359 | |
| 360 | wd1 = (nbph >> 6) & 31 ; |
| 361 | wd2 = nbph >> 11 ; |
| 362 | if ((10-wd2) < 0) wd3 = ilb[wd1] << (wd2-10) ; |
| 363 | else wd3 = ilb[wd1] >> (10-wd2) ; |
| 364 | deph = wd3 << 2 ; |
| 365 | |
| 366 | /* DELAYA */ |
| 367 | enc->nbh = nbph ; |
| 368 | /* DELAYH */ |
| 369 | deth = deph ; |
| 370 | |
| 371 | return (deth) ; |
| 372 | } |
| 373 | |
| 374 | static int block4h (g722_enc_t *enc, int d) |
| 375 | { |
| 376 | int sh = enc->shigh; |
| 377 | int i ; |
| 378 | int wd, wd1, wd2, wd3, wd4, wd5 /*, wd6 */; |
| 379 | |
| 380 | enc->dh[0] = d; |
| 381 | |
| 382 | /* RECONS */ |
| 383 | |
| 384 | enc->rh[0] = sh + enc->dh[0] ; |
| 385 | SATURATE(enc->rh[0], 32767, -32768); |
| 386 | |
| 387 | /* PARREC */ |
| 388 | |
| 389 | enc->ph[0] = enc->dh[0] + enc->szh ; |
| 390 | SATURATE(enc->ph[0], 32767, -32768); |
| 391 | |
| 392 | /* UPPOL2 */ |
| 393 | |
| 394 | enc->sgh[0] = enc->ph[0] >> 15 ; |
| 395 | enc->sgh[1] = enc->ph[1] >> 15 ; |
| 396 | enc->sgh[2] = enc->ph[2] >> 15 ; |
| 397 | |
| 398 | wd1 = enc->ah[1] << 2; |
| 399 | SATURATE(wd1, 32767, -32768); |
| 400 | |
| 401 | if ( enc->sgh[0] == enc->sgh[1] ) wd2 = - wd1 ; |
| 402 | else wd2 = wd1 ; |
| 403 | if ( wd2 > 32767 ) wd2 = 32767; |
| 404 | |
| 405 | wd2 = wd2 >> 7 ; |
| 406 | |
| 407 | if ( enc->sgh[0] == enc->sgh[2] ) wd3 = 128 ; |
| 408 | else wd3 = - 128 ; |
| 409 | |
| 410 | wd4 = wd2 + wd3 ; |
| 411 | wd5 = (enc->ah[2] * 32512) >> 15 ; |
| 412 | |
| 413 | enc->aph[2] = wd4 + wd5 ; |
| 414 | SATURATE(enc->aph[2], 12288, -12288); |
| 415 | |
| 416 | /* UPPOL1 */ |
| 417 | |
| 418 | enc->sgh[0] = enc->ph[0] >> 15 ; |
| 419 | enc->sgh[1] = enc->ph[1] >> 15 ; |
| 420 | |
| 421 | if ( enc->sgh[0] == enc->sgh[1] ) wd1 = 192 ; |
| 422 | else wd1 = - 192 ; |
| 423 | |
| 424 | wd2 = (enc->ah[1] * 32640) >> 15 ; |
| 425 | |
| 426 | enc->aph[1] = wd1 + wd2 ; |
| 427 | SATURATE(enc->aph[1], 32767, -32768); |
| 428 | |
| 429 | wd3 = (15360 - enc->aph[2]) ; |
| 430 | SATURATE(wd3, 32767, -32768); |
| 431 | |
| 432 | if ( enc->aph[1] > wd3) enc->aph[1] = wd3 ; |
| 433 | else if ( enc->aph[1] < -wd3) enc->aph[1] = -wd3 ; |
| 434 | |
| 435 | /* UPZERO */ |
| 436 | |
| 437 | if ( enc->dh[0] == 0 ) wd1 = 0 ; |
| 438 | else wd1 = 128 ; |
| 439 | |
| 440 | enc->sgh[0] = enc->dh[0] >> 15 ; |
| 441 | |
| 442 | for ( i = 1; i < 7; i++ ) { |
| 443 | enc->sgh[i] = enc->dh[i] >> 15 ; |
| 444 | if ( enc->sgh[i] == enc->sgh[0] ) wd2 = wd1 ; |
| 445 | else wd2 = - wd1 ; |
| 446 | wd3 = (enc->bh[i] * 32640) >> 15 ; |
| 447 | enc->bph[i] = wd2 + wd3 ; |
| 448 | SATURATE(enc->bph[i], 32767, -32768); |
| 449 | } |
| 450 | |
| 451 | /* DELAYA */ |
| 452 | for ( i = 6; i > 0; i-- ) { |
| 453 | enc->dh[i] = enc->dh[i-1] ; |
| 454 | enc->bh[i] = enc->bph[i] ; |
| 455 | } |
| 456 | |
| 457 | for ( i = 2; i > 0; i-- ) { |
| 458 | enc->rh[i] = enc->rh[i-1] ; |
| 459 | enc->ph[i] = enc->ph[i-1] ; |
| 460 | enc->ah[i] = enc->aph[i] ; |
| 461 | } |
| 462 | |
| 463 | /* FILTEP */ |
| 464 | |
| 465 | wd1 = enc->rh[1] + enc->rh[1]; |
| 466 | SATURATE(wd1, 32767, -32768); |
| 467 | wd1 = ( enc->ah[1] * wd1 ) >> 15 ; |
| 468 | |
| 469 | wd2 = enc->rh[2] + enc->rh[2]; |
| 470 | SATURATE(wd2, 32767, -32768); |
| 471 | wd2 = ( enc->ah[2] * wd2 ) >> 15 ; |
| 472 | |
| 473 | enc->sph = wd1 + wd2 ; |
| 474 | SATURATE(enc->sph, 32767, -32768); |
| 475 | |
| 476 | /* FILTEZ */ |
| 477 | |
| 478 | enc->szh = 0 ; |
| 479 | for (i=6; i>0; i--) { |
| 480 | wd = enc->dh[i] + enc->dh[i]; |
| 481 | SATURATE(wd, 32767, -32768); |
| 482 | enc->szh += (enc->bh[i] * wd) >> 15 ; |
| 483 | SATURATE(enc->szh, 32767, -32768); |
| 484 | } |
| 485 | |
| 486 | /* PREDIC */ |
| 487 | |
| 488 | sh = enc->sph + enc->szh ; |
| 489 | SATURATE(sh, 32767, -32768); |
| 490 | |
| 491 | return (sh) ; |
| 492 | } |
| 493 | |
| 494 | /* PROCESS PCM THROUGH THE QMF FILTER */ |
| 495 | static void tx_qmf(g722_enc_t *enc, int pcm1, int pcm2, int *lo, int *hi) |
| 496 | { |
| 497 | int sumodd, sumeven; |
| 498 | int i; |
| 499 | |
| 500 | pj_memmove(&enc->x[2], enc->x, 22 * sizeof(enc->x[0])); |
| 501 | enc->x[1] = pcm1; |
| 502 | enc->x[0] = pcm2; |
| 503 | |
| 504 | sumodd = 0; |
| 505 | for (i=1; i<24; i+=2) sumodd += enc->x[i] * g722_qmf_coeff[i]; |
| 506 | |
| 507 | sumeven = 0; |
| 508 | for (i=0; i<24; i+=2) sumeven += enc->x[i] * g722_qmf_coeff[i]; |
| 509 | |
| 510 | *lo = (sumeven + sumodd) >> 13 ; |
| 511 | *hi = (sumeven - sumodd) >> 13 ; |
| 512 | |
| 513 | SATURATE(*lo, 16383, -16384); |
| 514 | SATURATE(*hi, 16383, -16383); |
| 515 | } |
| 516 | |
| 517 | |
| 518 | PJ_DEF(pj_status_t) g722_enc_init(g722_enc_t *enc) |
| 519 | { |
| 520 | PJ_ASSERT_RETURN(enc, PJ_EINVAL); |
| 521 | |
| 522 | pj_bzero(enc, sizeof(g722_enc_t)); |
| 523 | |
| 524 | enc->detlow = 32; |
| 525 | enc->dethigh = 8; |
| 526 | |
| 527 | return PJ_SUCCESS; |
| 528 | } |
| 529 | |
| 530 | PJ_DEF(pj_status_t) g722_enc_encode( g722_enc_t *enc, |
| 531 | pj_int16_t in[], |
| 532 | pj_size_t nsamples, |
| 533 | void *out, |
| 534 | pj_size_t *out_size) |
| 535 | { |
| 536 | unsigned i; |
| 537 | int xlow, ilow, dlowt; |
| 538 | int xhigh, ihigh, dhigh; |
| 539 | pj_uint8_t *out_ = (pj_uint8_t*) out; |
| 540 | |
| 541 | PJ_ASSERT_RETURN(enc && in && nsamples && out && out_size, PJ_EINVAL); |
| 542 | PJ_ASSERT_RETURN(nsamples % 2 == 0, PJ_EINVAL); |
| 543 | PJ_ASSERT_RETURN(*out_size >= (nsamples >> 1), PJ_ETOOSMALL); |
| 544 | |
| 545 | for(i = 0; i < nsamples; i += 2) { |
| 546 | tx_qmf(enc, in[i], in[i+1], &xlow, &xhigh); |
| 547 | |
| 548 | /* low band encoder */ |
| 549 | ilow = block1l (xlow, enc->slow, enc->detlow) ; |
| 550 | dlowt = block2l (ilow, enc->detlow) ; |
| 551 | enc->detlow = block3l (enc, ilow) ; |
| 552 | enc->slow = block4l (enc, dlowt) ; |
| 553 | |
| 554 | /* high band encoder */ |
| 555 | ihigh = block1h (xhigh, enc->shigh, enc->dethigh) ; |
| 556 | dhigh = block2h (ihigh, enc->dethigh) ; |
| 557 | enc->dethigh = block3h (enc, ihigh) ; |
| 558 | enc->shigh = block4h (enc, dhigh) ; |
| 559 | |
| 560 | /* bits mix low & high adpcm */ |
| 561 | out_[i/2] = (pj_uint8_t)((ihigh << 6) | ilow); |
| 562 | } |
| 563 | |
| 564 | *out_size = nsamples >> 1; |
| 565 | |
| 566 | return PJ_SUCCESS; |
| 567 | } |
| 568 | |
| 569 | PJ_DEF(pj_status_t) g722_enc_deinit(g722_enc_t *enc) |
| 570 | { |
| 571 | pj_bzero(enc, sizeof(g722_enc_t)); |
| 572 | |
| 573 | return PJ_SUCCESS; |
| 574 | } |
| 575 | |
| 576 | #endif |