Benny Prijono | 7ffd775 | 2008-03-17 14:07:53 +0000 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C)2003-2008 Benny Prijono <benny@prijono.org> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | */ |
| 19 | /* |
| 20 | * Based on implementation found in Carnegie Mellon Speech Group Software |
| 21 | * depository (ftp://ftp.cs.cmu.edu/project/fgdata/index.html). No copyright |
| 22 | * was claimed in the original source codes. |
| 23 | */ |
| 24 | #include <pjmedia/errno.h> |
| 25 | #include <pj/assert.h> |
| 26 | #include <pj/pool.h> |
| 27 | |
| 28 | #include "g722_dec.h" |
| 29 | |
| 30 | #if defined(PJMEDIA_HAS_G722_CODEC) && (PJMEDIA_HAS_G722_CODEC != 0) |
| 31 | |
| 32 | #define MODE 1 |
| 33 | |
| 34 | #define SATURATE(v, max, min) \ |
| 35 | if (v>max) v = max; \ |
| 36 | else if (v<min) v = min |
| 37 | |
| 38 | extern const int g722_qmf_coeff[24]; |
| 39 | |
| 40 | static const int qm4[16] = |
| 41 | { |
| 42 | 0, -20456, -12896, -8968, |
| 43 | -6288, -4240, -2584, -1200, |
| 44 | 20456, 12896, 8968, 6288, |
| 45 | 4240, 2584, 1200, 0 |
| 46 | }; |
| 47 | static const int ilb[32] = { |
| 48 | 2048, 2093, 2139, 2186, 2233, 2282, 2332, |
| 49 | 2383, 2435, 2489, 2543, 2599, 2656, 2714, |
| 50 | 2774, 2834, 2896, 2960, 3025, 3091, 3158, |
| 51 | 3228, 3298, 3371, 3444, 3520, 3597, 3676, |
| 52 | 3756, 3838, 3922, 4008 |
| 53 | }; |
| 54 | |
| 55 | |
| 56 | static int block2l (int il, int detl) |
| 57 | { |
| 58 | int dlt ; |
| 59 | int ril, wd2 ; |
| 60 | |
| 61 | /* INVQAL */ |
| 62 | ril = il >> 2 ; |
| 63 | wd2 = qm4[ril] ; |
| 64 | dlt = (detl * wd2) >> 15 ; |
| 65 | |
| 66 | return (dlt) ; |
| 67 | } |
| 68 | |
| 69 | |
| 70 | static int block3l (g722_dec_t *dec, int il) |
| 71 | { |
| 72 | int detl ; |
| 73 | int ril, il4, wd, wd1, wd2, wd3, nbpl, depl ; |
| 74 | static const int wl[8] = { |
| 75 | -60, -30, 58, 172, 334, 538, 1198, 3042 |
| 76 | }; |
| 77 | static const int rl42[16] = { |
| 78 | 0, 7, 6, 5, 4, 3, 2, 1, 7, 6, 5, 4, 3, 2, 1, 0 |
| 79 | }; |
| 80 | |
| 81 | /* LOGSCL */ |
| 82 | ril = il >> 2 ; |
| 83 | il4 = rl42[ril] ; |
| 84 | wd = (dec->nbl * 32512) >> 15 ; |
| 85 | nbpl = wd + wl[il4] ; |
| 86 | |
| 87 | if (nbpl < 0) nbpl = 0 ; |
| 88 | if (nbpl > 18432) nbpl = 18432 ; |
| 89 | |
| 90 | /* SCALEL */ |
| 91 | wd1 = (nbpl >> 6) & 31 ; |
| 92 | wd2 = nbpl >> 11 ; |
| 93 | if ((8 - wd2) < 0) wd3 = ilb[wd1] << (wd2 - 8) ; |
| 94 | else wd3 = ilb[wd1] >> (8 - wd2) ; |
| 95 | depl = wd3 << 2 ; |
| 96 | |
| 97 | /* DELAYA */ |
| 98 | dec->nbl = nbpl ; |
| 99 | /* DELAYL */ |
| 100 | detl = depl ; |
| 101 | |
| 102 | return (detl) ; |
| 103 | } |
| 104 | |
| 105 | |
| 106 | static int block4l (g722_dec_t *dec, int dl) |
| 107 | { |
| 108 | int sl = dec->slow ; |
| 109 | int i ; |
| 110 | int wd, wd1, wd2, wd3, wd4, wd5/*, wd6 */; |
| 111 | |
| 112 | dec->dlt[0] = dl; |
| 113 | |
| 114 | /* RECONS */ |
| 115 | dec->rlt[0] = sl + dec->dlt[0] ; |
| 116 | SATURATE(dec->rlt[0], 32767, -32768); |
| 117 | |
| 118 | /* PARREC */ |
| 119 | dec->plt[0] = dec->dlt[0] + dec->szl ; |
| 120 | SATURATE(dec->plt[0], 32767, -32768); |
| 121 | |
| 122 | /* UPPOL2 */ |
| 123 | dec->sgl[0] = dec->plt[0] >> 15 ; |
| 124 | dec->sgl[1] = dec->plt[1] >> 15 ; |
| 125 | dec->sgl[2] = dec->plt[2] >> 15 ; |
| 126 | |
| 127 | wd1 = dec->al[1] << 2; |
| 128 | SATURATE(wd1, 32767, -32768); |
| 129 | |
| 130 | if ( dec->sgl[0] == dec->sgl[1] ) wd2 = - wd1 ; |
| 131 | else wd2 = wd1 ; |
| 132 | if (wd2 > 32767) wd2 = 32767; |
| 133 | wd2 = wd2 >> 7 ; |
| 134 | |
| 135 | if ( dec->sgl[0] == dec->sgl[2] ) wd3 = 128 ; |
| 136 | else wd3 = - 128 ; |
| 137 | |
| 138 | wd4 = wd2 + wd3 ; |
| 139 | wd5 = (dec->al[2] * 32512) >> 15 ; |
| 140 | |
| 141 | dec->apl[2] = wd4 + wd5 ; |
| 142 | SATURATE(dec->apl[2], 12288, -12288); |
| 143 | |
| 144 | /* UPPOL1 */ |
| 145 | dec->sgl[0] = dec->plt[0] >> 15 ; |
| 146 | dec->sgl[1] = dec->plt[1] >> 15 ; |
| 147 | |
| 148 | if ( dec->sgl[0] == dec->sgl[1] ) wd1 = 192 ; |
| 149 | else wd1 = - 192 ; |
| 150 | |
| 151 | wd2 = (dec->al[1] * 32640) >> 15 ; |
| 152 | |
| 153 | dec->apl[1] = wd1 + wd2 ; |
| 154 | SATURATE(dec->apl[1], 32767, -32768); |
| 155 | |
| 156 | wd3 = (15360 - dec->apl[2]) ; |
| 157 | SATURATE(wd3, 32767, -32768); |
| 158 | if ( dec->apl[1] > wd3) dec->apl[1] = wd3 ; |
| 159 | if ( dec->apl[1] < -wd3) dec->apl[1] = -wd3 ; |
| 160 | |
| 161 | /* UPZERO */ |
| 162 | if ( dec->dlt[0] == 0 ) wd1 = 0 ; |
| 163 | else wd1 = 128 ; |
| 164 | |
| 165 | dec->sgl[0] = dec->dlt[0] >> 15 ; |
| 166 | |
| 167 | for ( i = 1; i < 7; i++ ) { |
| 168 | dec->sgl[i] = dec->dlt[i] >> 15 ; |
| 169 | if ( dec->sgl[i] == dec->sgl[0] ) wd2 = wd1 ; |
| 170 | else wd2 = - wd1 ; |
| 171 | wd3 = (dec->bl[i] * 32640) >> 15 ; |
| 172 | dec->bpl[i] = wd2 + wd3 ; |
| 173 | SATURATE(dec->bpl[i], 32767, -32768); |
| 174 | } |
| 175 | |
| 176 | /* DELAYA */ |
| 177 | for ( i = 6; i > 0; i-- ) { |
| 178 | dec->dlt[i] = dec->dlt[i-1] ; |
| 179 | dec->bl[i] = dec->bpl[i] ; |
| 180 | } |
| 181 | |
| 182 | for ( i = 2; i > 0; i-- ) { |
| 183 | dec->rlt[i] = dec->rlt[i-1] ; |
| 184 | dec->plt[i] = dec->plt[i-1] ; |
| 185 | dec->al[i] = dec->apl[i] ; |
| 186 | } |
| 187 | |
| 188 | /* FILTEP */ |
| 189 | wd1 = dec->rlt[1] << 1; |
| 190 | SATURATE(wd1, 32767, -32768); |
| 191 | wd1 = ( dec->al[1] * wd1 ) >> 15 ; |
| 192 | |
| 193 | wd2 = dec->rlt[2] << 1; |
| 194 | SATURATE(wd2, 32767, -32768); |
| 195 | wd2 = ( dec->al[2] * wd2 ) >> 15 ; |
| 196 | |
| 197 | dec->spl = wd1 + wd2 ; |
| 198 | SATURATE(dec->spl, 32767, -32768); |
| 199 | |
| 200 | /* FILTEZ */ |
| 201 | dec->szl = 0 ; |
| 202 | for (i=6; i>0; i--) { |
| 203 | wd = dec->dlt[i] << 1; |
| 204 | SATURATE(wd, 32767, -32768); |
| 205 | dec->szl += (dec->bl[i] * wd) >> 15 ; |
| 206 | SATURATE(dec->szl, 32767, -32768); |
| 207 | } |
| 208 | |
| 209 | /* PREDIC */ |
| 210 | sl = dec->spl + dec->szl ; |
| 211 | SATURATE(sl, 32767, -32768); |
| 212 | |
| 213 | return (sl) ; |
| 214 | } |
| 215 | |
| 216 | static int block5l (int ilr, int sl, int detl, int mode) |
| 217 | { |
| 218 | int yl ; |
| 219 | int ril, dl, wd2 = 0; |
| 220 | static const int qm5[32] = { |
| 221 | -280, -280, -23352, -17560, |
| 222 | -14120, -11664, -9752, -8184, |
| 223 | -6864, -5712, -4696, -3784, |
| 224 | -2960, -2208, -1520, -880, |
| 225 | 23352, 17560, 14120, 11664, |
| 226 | 9752, 8184, 6864, 5712, |
| 227 | 4696, 3784, 2960, 2208, |
| 228 | 1520, 880, 280, -280 |
| 229 | }; |
| 230 | static const int qm6[64] = { |
| 231 | -136, -136, -136, -136, |
| 232 | -24808, -21904, -19008, -16704, |
| 233 | -14984, -13512, -12280, -11192, |
| 234 | -10232, -9360, -8576, -7856, |
| 235 | -7192, -6576, -6000, -5456, |
| 236 | -4944, -4464, -4008, -3576, |
| 237 | -3168, -2776, -2400, -2032, |
| 238 | -1688, -1360, -1040, -728, |
| 239 | 24808, 21904, 19008, 16704, |
| 240 | 14984, 13512, 12280, 11192, |
| 241 | 10232, 9360, 8576, 7856, |
| 242 | 7192, 6576, 6000, 5456, |
| 243 | 4944, 4464, 4008, 3576, |
| 244 | 3168, 2776, 2400, 2032, |
| 245 | 1688, 1360, 1040, 728, |
| 246 | 432, 136, -432, -136 |
| 247 | }; |
| 248 | |
| 249 | /* INVQBL */ |
| 250 | if (mode == 1) { |
| 251 | ril = ilr ; |
| 252 | wd2 = qm6[ril] ; |
| 253 | } |
| 254 | |
| 255 | if (mode == 2) { |
| 256 | ril = ilr >> 1 ; |
| 257 | wd2 = qm5[ril] ; |
| 258 | } |
| 259 | |
| 260 | if (mode == 3) { |
| 261 | ril = ilr >> 2 ; |
| 262 | wd2 = qm4[ril] ; |
| 263 | } |
| 264 | |
| 265 | dl = (detl * wd2 ) >> 15 ; |
| 266 | |
| 267 | /* RECONS */ |
| 268 | yl = sl + dl ; |
| 269 | SATURATE(yl, 32767, -32768); |
| 270 | |
| 271 | return (yl) ; |
| 272 | } |
| 273 | |
| 274 | static int block6l (int yl) |
| 275 | { |
| 276 | int rl ; |
| 277 | |
| 278 | rl = yl ; |
| 279 | SATURATE(rl, 16383, -16384); |
| 280 | |
| 281 | return (rl) ; |
| 282 | } |
| 283 | |
| 284 | static int block2h (int ih, int deth) |
| 285 | { |
| 286 | int dh ; |
| 287 | int wd2 ; |
| 288 | static const int qm2[4] = {-7408, -1616, 7408, 1616} ; |
| 289 | |
| 290 | /* INVQAH */ |
| 291 | wd2 = qm2[ih] ; |
| 292 | dh = (deth * wd2) >> 15 ; |
| 293 | |
| 294 | return (dh) ; |
| 295 | } |
| 296 | |
| 297 | static int block3h (g722_dec_t *dec, int ih) |
| 298 | { |
| 299 | int deth ; |
| 300 | int ih2, wd, wd1, wd2, wd3, nbph, deph ; |
| 301 | static const int wh[3] = {0, -214, 798} ; |
| 302 | static const int rh2[4] = {2, 1, 2, 1} ; |
| 303 | |
| 304 | /* LOGSCH */ |
| 305 | ih2 = rh2[ih] ; |
| 306 | wd = (dec->nbh * 32512) >> 15 ; |
| 307 | nbph = wd + wh[ih2] ; |
| 308 | |
| 309 | if (nbph < 0) nbph = 0 ; |
| 310 | if (nbph > 22528) nbph = 22528 ; |
| 311 | |
| 312 | |
| 313 | /* SCALEH */ |
| 314 | wd1 = (nbph >> 6) & 31 ; |
| 315 | wd2 = nbph >> 11 ; |
| 316 | if ((10 - wd2) < 0) wd3 = ilb[wd1] << (wd2 - 10) ; |
| 317 | else wd3 = ilb[wd1] >> (10 - wd2) ; |
| 318 | deph = wd3 << 2 ; |
| 319 | |
| 320 | /* DELAYA */ |
| 321 | dec->nbh = nbph ; |
| 322 | |
| 323 | /* DELAYH */ |
| 324 | deth = deph ; |
| 325 | |
| 326 | return (deth) ; |
| 327 | } |
| 328 | |
| 329 | static int block4h (g722_dec_t *dec, int d) |
| 330 | { |
| 331 | int sh = dec->shigh; |
| 332 | int i ; |
| 333 | int wd, wd1, wd2, wd3, wd4, wd5/*, wd6 */; |
| 334 | |
| 335 | dec->dh[0] = d; |
| 336 | |
| 337 | /* RECONS */ |
| 338 | dec->rh[0] = sh + dec->dh[0] ; |
| 339 | SATURATE(dec->rh[0], 32767, -32768); |
| 340 | |
| 341 | /* PARREC */ |
| 342 | dec->ph[0] = dec->dh[0] + dec->szh ; |
| 343 | SATURATE(dec->ph[0], 32767, -32768); |
| 344 | |
| 345 | /* UPPOL2 */ |
| 346 | dec->sgh[0] = dec->ph[0] >> 15 ; |
| 347 | dec->sgh[1] = dec->ph[1] >> 15 ; |
| 348 | dec->sgh[2] = dec->ph[2] >> 15 ; |
| 349 | |
| 350 | wd1 = dec->ah[1] << 2; |
| 351 | SATURATE(wd1, 32767, -32768); |
| 352 | |
| 353 | if ( dec->sgh[0] == dec->sgh[1] ) wd2 = - wd1 ; |
| 354 | else wd2 = wd1 ; |
| 355 | if (wd2 > 32767) wd2 = 32767; |
| 356 | |
| 357 | wd2 = wd2 >> 7 ; |
| 358 | |
| 359 | if ( dec->sgh[0] == dec->sgh[2] ) wd3 = 128 ; |
| 360 | else wd3 = - 128 ; |
| 361 | |
| 362 | wd4 = wd2 + wd3 ; |
| 363 | wd5 = (dec->ah[2] * 32512) >> 15 ; |
| 364 | |
| 365 | dec->aph[2] = wd4 + wd5 ; |
| 366 | SATURATE(dec->aph[2], 12288, -12288); |
| 367 | |
| 368 | /* UPPOL1 */ |
| 369 | dec->sgh[0] = dec->ph[0] >> 15 ; |
| 370 | dec->sgh[1] = dec->ph[1] >> 15 ; |
| 371 | |
| 372 | if ( dec->sgh[0] == dec->sgh[1] ) wd1 = 192 ; |
| 373 | else wd1 = - 192 ; |
| 374 | |
| 375 | wd2 = (dec->ah[1] * 32640) >> 15 ; |
| 376 | |
| 377 | dec->aph[1] = wd1 + wd2 ; |
| 378 | SATURATE(dec->aph[1], 32767, -32768); |
| 379 | //dec->aph[2]? |
| 380 | //if (aph[2] > 32767) aph[2] = 32767; |
| 381 | //if (aph[2] < -32768) aph[2] = -32768; |
| 382 | |
| 383 | wd3 = (15360 - dec->aph[2]) ; |
| 384 | SATURATE(wd3, 32767, -32768); |
| 385 | if ( dec->aph[1] > wd3) dec->aph[1] = wd3 ; |
| 386 | if ( dec->aph[1] < -wd3) dec->aph[1] = -wd3 ; |
| 387 | |
| 388 | /* UPZERO */ |
| 389 | if ( dec->dh[0] == 0 ) wd1 = 0 ; |
| 390 | if ( dec->dh[0] != 0 ) wd1 = 128 ; |
| 391 | |
| 392 | dec->sgh[0] = dec->dh[0] >> 15 ; |
| 393 | |
| 394 | for ( i = 1; i < 7; i++ ) { |
| 395 | dec->sgh[i] = dec->dh[i] >> 15 ; |
| 396 | if ( dec->sgh[i] == dec->sgh[0] ) wd2 = wd1 ; |
| 397 | else wd2 = - wd1 ; |
| 398 | wd3 = (dec->bh[i] * 32640) >> 15 ; |
| 399 | dec->bph[i] = wd2 + wd3 ; |
| 400 | } |
| 401 | |
| 402 | /* DELAYA */ |
| 403 | for ( i = 6; i > 0; i-- ) { |
| 404 | dec->dh[i] = dec->dh[i-1] ; |
| 405 | dec->bh[i] = dec->bph[i] ; |
| 406 | } |
| 407 | |
| 408 | for ( i = 2; i > 0; i-- ) { |
| 409 | dec->rh[i] = dec->rh[i-1] ; |
| 410 | dec->ph[i] = dec->ph[i-1] ; |
| 411 | dec->ah[i] = dec->aph[i] ; |
| 412 | } |
| 413 | |
| 414 | /* FILTEP */ |
| 415 | wd1 = dec->rh[1] << 1 ; |
| 416 | SATURATE(wd1, 32767, -32768); |
| 417 | wd1 = ( dec->ah[1] * wd1 ) >> 15 ; |
| 418 | |
| 419 | wd2 = dec->rh[2] << 1; |
| 420 | SATURATE(wd2, 32767, -32768); |
| 421 | wd2 = ( dec->ah[2] * wd2 ) >> 15 ; |
| 422 | |
| 423 | dec->sph = wd1 + wd2 ; |
| 424 | SATURATE(dec->sph, 32767, -32768); |
| 425 | |
| 426 | /* FILTEZ */ |
| 427 | dec->szh = 0 ; |
| 428 | for (i=6; i>0; i--) { |
| 429 | wd = dec->dh[i] << 1; |
| 430 | SATURATE(wd, 32767, -32768); |
| 431 | dec->szh += (dec->bh[i] * wd) >> 15 ; |
| 432 | SATURATE(dec->szh, 32767, -32768); |
| 433 | } |
| 434 | |
| 435 | /* PREDIC */ |
| 436 | sh = dec->sph + dec->szh ; |
| 437 | SATURATE(sh, 32767, -32768); |
| 438 | |
| 439 | return (sh) ; |
| 440 | } |
| 441 | |
| 442 | static int block5h (int dh, int sh) |
| 443 | { |
| 444 | int rh ; |
| 445 | |
| 446 | rh = dh + sh; |
| 447 | SATURATE(rh, 16383, -16384); |
| 448 | |
| 449 | return (rh) ; |
| 450 | } |
| 451 | |
| 452 | void rx_qmf(g722_dec_t *dec, int rl, int rh, int *xout1, int *xout2) |
| 453 | { |
| 454 | int i; |
| 455 | |
| 456 | pj_memmove(&dec->xd[1], dec->xd, 11*sizeof(dec->xd[0])); |
| 457 | pj_memmove(&dec->xs[1], dec->xs, 11*sizeof(dec->xs[0])); |
| 458 | |
| 459 | /* RECA */ |
| 460 | dec->xd[0] = rl - rh ; |
| 461 | if (dec->xd[0] > 16383) dec->xd[0] = 16383; |
| 462 | else if (dec->xd[0] < -16384) dec->xd[0] = -16384; |
| 463 | |
| 464 | /* RECB */ |
| 465 | dec->xs[0] = rl + rh ; |
| 466 | if (dec->xs[0] > 16383) dec->xs[0] = 16383; |
| 467 | else if (dec->xs[0] < -16384) dec->xs[0] = -16384; |
| 468 | |
| 469 | /* ACCUMC */ |
| 470 | *xout1 = 0; |
| 471 | for (i=0; i<12; ++i) *xout1 += dec->xd[i] * g722_qmf_coeff[2*i]; |
| 472 | *xout1 = *xout1 >> 12 ; |
| 473 | if (*xout1 > 16383) *xout1 = 16383 ; |
| 474 | else if (*xout1 < -16384) *xout1 = -16384 ; |
| 475 | |
| 476 | /* ACCUMD */ |
| 477 | *xout2 = 0; |
| 478 | for (i=0; i<12; ++i) *xout2 += dec->xs[i] * g722_qmf_coeff[2*i+1]; |
| 479 | *xout2 = *xout2 >> 12 ; |
| 480 | if (*xout2 > 16383) *xout2 = 16383 ; |
| 481 | else if (*xout2 < -16384) *xout2 = -16384 ; |
| 482 | } |
| 483 | |
| 484 | |
| 485 | PJ_DEF(pj_status_t) g722_dec_init(g722_dec_t *dec) |
| 486 | { |
| 487 | PJ_ASSERT_RETURN(dec, PJ_EINVAL); |
| 488 | |
| 489 | pj_bzero(dec, sizeof(g722_dec_t)); |
| 490 | |
| 491 | dec->detlow = 32; |
| 492 | dec->dethigh = 8; |
| 493 | |
| 494 | return PJ_SUCCESS; |
| 495 | } |
| 496 | |
| 497 | PJ_DEF(pj_status_t) g722_dec_decode( g722_dec_t *dec, |
| 498 | void *in, |
| 499 | pj_size_t in_size, |
| 500 | pj_int16_t out[], |
| 501 | pj_size_t *nsamples) |
| 502 | { |
| 503 | unsigned i; |
| 504 | int ilowr, ylow, rlow, dlowt; |
| 505 | int ihigh, rhigh, dhigh; |
| 506 | int pcm1, pcm2; |
| 507 | pj_uint8_t *in_ = (pj_uint8_t*) in; |
| 508 | |
| 509 | PJ_ASSERT_RETURN(dec && in && in_size && out && nsamples, PJ_EINVAL); |
| 510 | PJ_ASSERT_RETURN(*nsamples >= (in_size << 1), PJ_ETOOSMALL); |
| 511 | |
| 512 | for(i = 0; i < in_size; ++i) { |
| 513 | ilowr = in_[i] & 63; |
| 514 | ihigh = (in_[i] >> 6) & 3; |
| 515 | |
| 516 | /* low band decoder */ |
| 517 | ylow = block5l (ilowr, dec->slow, dec->detlow, MODE) ; |
| 518 | rlow = block6l (ylow) ; |
| 519 | dlowt = block2l (ilowr, dec->detlow) ; |
| 520 | dec->detlow = block3l (dec, ilowr) ; |
| 521 | dec->slow = block4l (dec, dlowt) ; |
| 522 | /* rlow <= output low band pcm */ |
| 523 | |
| 524 | /* high band decoder */ |
| 525 | dhigh = block2h (ihigh, dec->dethigh) ; |
| 526 | rhigh = block5h (dhigh, dec->shigh) ; |
| 527 | dec->dethigh = block3h (dec, ihigh) ; |
| 528 | dec->shigh = block4h (dec, dhigh) ; |
| 529 | /* rhigh <= output high band pcm */ |
| 530 | |
| 531 | rx_qmf(dec, rlow, rhigh, &pcm1, &pcm2); |
Nanang Izzuddin | ee340b3 | 2008-10-06 18:42:13 +0000 | [diff] [blame^] | 532 | out[i*2] = (pj_int16_t)(pcm1 << 2); |
| 533 | out[i*2+1] = (pj_int16_t)(pcm2 << 2); |
Benny Prijono | 7ffd775 | 2008-03-17 14:07:53 +0000 | [diff] [blame] | 534 | } |
| 535 | |
| 536 | *nsamples = in_size << 1; |
| 537 | |
| 538 | return PJ_SUCCESS; |
| 539 | } |
| 540 | |
| 541 | PJ_DEF(pj_status_t) g722_dec_deinit(g722_dec_t *dec) |
| 542 | { |
| 543 | pj_bzero(dec, sizeof(g722_dec_t)); |
| 544 | |
| 545 | return PJ_SUCCESS; |
| 546 | } |
| 547 | |
| 548 | #endif |