1 2 /* ----------------------------------------------------------------------------------------------------------- 3 Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5 Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Frderung der angewandten Forschung e.V. 6 All rights reserved. 7 8 1. INTRODUCTION 9 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements 10 the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. 11 This FDK AAC Codec software is intended to be used on a wide variety of Android devices. 12 13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual 14 audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by 15 independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part 16 of the MPEG specifications. 17 18 Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) 19 may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners 20 individually for the purpose of encoding or decoding bit streams in products that are compliant with 21 the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license 22 these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec 23 software may already be covered under those patent licenses when it is used for those licensed purposes only. 24 25 Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, 26 are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional 27 applications information and documentation. 28 29 2. COPYRIGHT LICENSE 30 31 Redistribution and use in source and binary forms, with or without modification, are permitted without 32 payment of copyright license fees provided that you satisfy the following conditions: 33 34 You must retain the complete text of this software license in redistributions of the FDK AAC Codec or 35 your modifications thereto in source code form. 36 37 You must retain the complete text of this software license in the documentation and/or other materials 38 provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. 39 You must make available free of charge copies of the complete source code of the FDK AAC Codec and your 40 modifications thereto to recipients of copies in binary form. 41 42 The name of Fraunhofer may not be used to endorse or promote products derived from this library without 43 prior written permission. 44 45 You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec 46 software or your modifications thereto. 47 48 Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software 49 and the date of any change. For modified versions of the FDK AAC Codec, the term 50 "Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term 51 "Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." 52 53 3. NO PATENT LICENSE 54 55 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, 56 ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with 57 respect to this software. 58 59 You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized 60 by appropriate patent licenses. 61 62 4. DISCLAIMER 63 64 This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors 65 "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties 66 of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 67 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, 68 including but not limited to procurement of substitute goods or services; loss of use, data, or profits, 69 or business interruption, however caused and on any theory of liability, whether in contract, strict 70 liability, or tort (including negligence), arising in any way out of the use of this software, even if 71 advised of the possibility of such damage. 72 73 5. CONTACT INFORMATION 74 75 Fraunhofer Institute for Integrated Circuits IIS 76 Attention: Audio and Multimedia Departments - FDK AAC LL 77 Am Wolfsmantel 33 78 91058 Erlangen, Germany 79 80 www.iis.fraunhofer.de/amm 81 amm-info (at) iis.fraunhofer.de 82 ----------------------------------------------------------------------------------------------------------- */ 83 84 /***************************** MPEG Audio Encoder *************************** 85 86 Initial Authors: M. Multrus 87 Contents/Description: PS Wrapper, Downmix 88 89 ******************************************************************************/ 90 91 #include "ps_main.h" 92 93 94 /* Includes ******************************************************************/ 95 96 #include "ps_const.h" 97 #include "ps_bitenc.h" 98 99 #include "sbr_ram.h" 100 101 /*--------------- function declarations --------------------*/ 102 static void psFindBestScaling( 103 HANDLE_PARAMETRIC_STEREO hParametricStereo, 104 FIXP_DBL *hybridData[HYBRID_FRAMESIZE][MAX_PS_CHANNELS][2], 105 UCHAR *dynBandScale, 106 FIXP_QMF *maxBandValue, 107 SCHAR *dmxScale 108 ); 109 110 /*------------- function definitions ----------------*/ 111 FDK_PSENC_ERROR PSEnc_Create( 112 HANDLE_PARAMETRIC_STEREO *phParametricStereo 113 ) 114 { 115 FDK_PSENC_ERROR error = PSENC_OK; 116 117 if (phParametricStereo==NULL) { 118 error = PSENC_INVALID_HANDLE; 119 } 120 else { 121 int i; 122 HANDLE_PARAMETRIC_STEREO hParametricStereo = NULL; 123 124 if (NULL==(hParametricStereo = GetRam_ParamStereo())) { 125 error = PSENC_MEMORY_ERROR; 126 goto bail; 127 } 128 FDKmemclear(hParametricStereo, sizeof(PARAMETRIC_STEREO)); 129 130 if (PSENC_OK != (error = FDKsbrEnc_CreatePSEncode(&hParametricStereo->hPsEncode))) { 131 goto bail; 132 } 133 134 for (i=0; i<MAX_PS_CHANNELS; i++) { 135 if (FDKhybridAnalysisOpen( 136 &hParametricStereo->fdkHybAnaFilter[i], 137 hParametricStereo->__staticHybAnaStatesLF[i], 138 sizeof(hParametricStereo->__staticHybAnaStatesLF[i]), 139 hParametricStereo->__staticHybAnaStatesHF[i], 140 sizeof(hParametricStereo->__staticHybAnaStatesHF[i]) 141 ) !=0 ) 142 { 143 error = PSENC_MEMORY_ERROR; 144 goto bail; 145 } 146 } 147 148 *phParametricStereo = hParametricStereo; /* return allocated handle */ 149 } 150 bail: 151 return error; 152 } 153 154 FDK_PSENC_ERROR PSEnc_Init( 155 HANDLE_PARAMETRIC_STEREO hParametricStereo, 156 const HANDLE_PSENC_CONFIG hPsEncConfig, 157 INT noQmfSlots, 158 INT noQmfBands 159 ,UCHAR *dynamic_RAM 160 ) 161 { 162 FDK_PSENC_ERROR error = PSENC_OK; 163 164 if ( (NULL==hParametricStereo) || (NULL==hPsEncConfig) ) { 165 error = PSENC_INVALID_HANDLE; 166 } 167 else { 168 int ch, i; 169 170 hParametricStereo->initPS = 1; 171 hParametricStereo->noQmfSlots = noQmfSlots; 172 hParametricStereo->noQmfBands = noQmfBands; 173 174 /* clear delay lines */ 175 FDKmemclear(hParametricStereo->qmfDelayLines, sizeof(hParametricStereo->qmfDelayLines)); 176 177 hParametricStereo->qmfDelayScale = FRACT_BITS-1; 178 179 /* create configuration for hybrid filter bank */ 180 for (ch=0; ch<MAX_PS_CHANNELS; ch++) { 181 FDKhybridAnalysisInit( 182 &hParametricStereo->fdkHybAnaFilter[ch], 183 THREE_TO_TEN, 184 QMF_CHANNELS, 185 QMF_CHANNELS, 186 1 187 ); 188 } /* ch */ 189 190 FDKhybridSynthesisInit( 191 &hParametricStereo->fdkHybSynFilter, 192 THREE_TO_TEN, 193 QMF_CHANNELS, 194 QMF_CHANNELS 195 ); 196 197 /* determine average delay */ 198 hParametricStereo->psDelay = (HYBRID_FILTER_DELAY*hParametricStereo->noQmfBands); 199 200 if ( (hPsEncConfig->maxEnvelopes < PSENC_NENV_1) || (hPsEncConfig->maxEnvelopes > PSENC_NENV_MAX) ) { 201 hPsEncConfig->maxEnvelopes = PSENC_NENV_DEFAULT; 202 } 203 hParametricStereo->maxEnvelopes = hPsEncConfig->maxEnvelopes; 204 205 if (PSENC_OK != (error = FDKsbrEnc_InitPSEncode(hParametricStereo->hPsEncode, (PS_BANDS) hPsEncConfig->nStereoBands, hPsEncConfig->iidQuantErrorThreshold))){ 206 goto bail; 207 } 208 209 for (ch = 0; ch<MAX_PS_CHANNELS; ch ++) { 210 FIXP_DBL *pDynReal = GetRam_Sbr_envRBuffer (ch, dynamic_RAM); 211 FIXP_DBL *pDynImag = GetRam_Sbr_envIBuffer (ch, dynamic_RAM); 212 213 for (i=0; i<HYBRID_FRAMESIZE; i++) { 214 hParametricStereo->pHybridData[i+HYBRID_READ_OFFSET][ch][0] = &pDynReal[i*MAX_HYBRID_BANDS]; 215 hParametricStereo->pHybridData[i+HYBRID_READ_OFFSET][ch][1] = &pDynImag[i*MAX_HYBRID_BANDS];; 216 } 217 218 for (i=0; i<HYBRID_READ_OFFSET; i++) { 219 hParametricStereo->pHybridData[i][ch][0] = hParametricStereo->__staticHybridData[i][ch][0]; 220 hParametricStereo->pHybridData[i][ch][1] = hParametricStereo->__staticHybridData[i][ch][1]; 221 } 222 } /* ch */ 223 224 /* clear static hybrid buffer */ 225 FDKmemclear(hParametricStereo->__staticHybridData, sizeof(hParametricStereo->__staticHybridData)); 226 227 /* clear bs buffer */ 228 FDKmemclear(hParametricStereo->psOut, sizeof(hParametricStereo->psOut)); 229 230 hParametricStereo->psOut[0].enablePSHeader = 1; /* write ps header in first frame */ 231 232 /* clear scaling buffer */ 233 FDKmemclear(hParametricStereo->dynBandScale, sizeof(UCHAR)*PS_MAX_BANDS); 234 FDKmemclear(hParametricStereo->maxBandValue, sizeof(FIXP_QMF)*PS_MAX_BANDS); 235 236 } /* valid handle */ 237 bail: 238 return error; 239 } 240 241 242 FDK_PSENC_ERROR PSEnc_Destroy( 243 HANDLE_PARAMETRIC_STEREO *phParametricStereo 244 ) 245 { 246 FDK_PSENC_ERROR error = PSENC_OK; 247 248 if (NULL!=phParametricStereo) { 249 HANDLE_PARAMETRIC_STEREO hParametricStereo = *phParametricStereo; 250 if(hParametricStereo != NULL){ 251 FDKsbrEnc_DestroyPSEncode(&hParametricStereo->hPsEncode); 252 FreeRam_ParamStereo(phParametricStereo); 253 } 254 } 255 256 return error; 257 } 258 259 static FDK_PSENC_ERROR ExtractPSParameters( 260 HANDLE_PARAMETRIC_STEREO hParametricStereo, 261 const int sendHeader, 262 FIXP_DBL *hybridData[HYBRID_FRAMESIZE][MAX_PS_CHANNELS][2] 263 ) 264 { 265 FDK_PSENC_ERROR error = PSENC_OK; 266 267 if (hParametricStereo == NULL) { 268 error = PSENC_INVALID_HANDLE; 269 } 270 else { 271 /* call ps encode function */ 272 if (hParametricStereo->initPS){ 273 hParametricStereo->psOut[1] = hParametricStereo->psOut[0]; 274 } 275 hParametricStereo->psOut[0] = hParametricStereo->psOut[1]; 276 277 if (PSENC_OK != (error = FDKsbrEnc_PSEncode( 278 hParametricStereo->hPsEncode, 279 &hParametricStereo->psOut[1], 280 hParametricStereo->dynBandScale, 281 hParametricStereo->maxEnvelopes, 282 hybridData, 283 hParametricStereo->noQmfSlots, 284 sendHeader))) 285 { 286 goto bail; 287 } 288 289 if (hParametricStereo->initPS) { 290 hParametricStereo->psOut[0] = hParametricStereo->psOut[1]; 291 hParametricStereo->initPS = 0; 292 } 293 } 294 bail: 295 return error; 296 } 297 298 299 static FDK_PSENC_ERROR DownmixPSQmfData( 300 HANDLE_PARAMETRIC_STEREO hParametricStereo, 301 HANDLE_QMF_FILTER_BANK sbrSynthQmf, 302 FIXP_QMF **RESTRICT mixRealQmfData, 303 FIXP_QMF **RESTRICT mixImagQmfData, 304 INT_PCM *downsampledOutSignal, 305 FIXP_DBL *hybridData[HYBRID_FRAMESIZE][MAX_PS_CHANNELS][2], 306 const INT noQmfSlots, 307 const INT psQmfScale[MAX_PS_CHANNELS], 308 SCHAR *qmfScale 309 ) 310 { 311 FDK_PSENC_ERROR error = PSENC_OK; 312 313 if(hParametricStereo == NULL){ 314 error = PSENC_INVALID_HANDLE; 315 } 316 else { 317 int n, k; 318 C_AALLOC_SCRATCH_START(pWorkBuffer, FIXP_QMF, 2*QMF_CHANNELS) 319 320 /* define scalings */ 321 int dynQmfScale = fixMax(0, hParametricStereo->dmxScale-1); /* scale one bit more for addition of left and right */ 322 int downmixScale = psQmfScale[0] - dynQmfScale; 323 const FIXP_DBL maxStereoScaleFactor = MAXVAL_DBL; /* 2.f/2.f */ 324 325 for (n = 0; n<noQmfSlots; n++) { 326 327 FIXP_DBL tmpHybrid[2][MAX_HYBRID_BANDS]; 328 329 for(k = 0; k<71; k++){ 330 int dynScale, sc; /* scaling */ 331 FIXP_QMF tmpLeftReal, tmpRightReal, tmpLeftImag, tmpRightImag; 332 FIXP_DBL tmpScaleFactor, stereoScaleFactor; 333 334 tmpLeftReal = hybridData[n][0][0][k]; 335 tmpLeftImag = hybridData[n][0][1][k]; 336 tmpRightReal = hybridData[n][1][0][k]; 337 tmpRightImag = hybridData[n][1][1][k]; 338 339 sc = fixMax(0,CntLeadingZeros( fixMax(fixMax(fixp_abs(tmpLeftReal),fixp_abs(tmpLeftImag)),fixMax(fixp_abs(tmpRightReal),fixp_abs(tmpRightImag))) )-2); 340 341 tmpLeftReal <<= sc; tmpLeftImag <<= sc; 342 tmpRightReal <<= sc; tmpRightImag <<= sc; 343 dynScale = fixMin(sc-dynQmfScale,DFRACT_BITS-1); 344 345 /* calc stereo scale factor to avoid loss of energy in bands */ 346 /* stereo scale factor = min(2.0f, sqrt( (abs(l(k, n)^2 + abs(r(k, n)^2 )))/(0.5f*abs(l(k, n) + r(k, n))) )) */ 347 stereoScaleFactor = fPow2Div2(tmpLeftReal) + fPow2Div2(tmpLeftImag) 348 + fPow2Div2(tmpRightReal) + fPow2Div2(tmpRightImag) ; 349 350 /* might be that tmpScaleFactor becomes negative, so fabs(.) */ 351 tmpScaleFactor = fixp_abs(stereoScaleFactor + fMult(tmpLeftReal,tmpRightReal) + fMult(tmpLeftImag,tmpRightImag)); 352 353 /* min(2.0f, sqrt(stereoScaleFactor/(0.5f*tmpScaleFactor))) */ 354 if ( (stereoScaleFactor>>1) < fMult(maxStereoScaleFactor,tmpScaleFactor) ) { 355 356 int sc_num = CountLeadingBits(stereoScaleFactor) ; 357 int sc_denum = CountLeadingBits(tmpScaleFactor) ; 358 sc = -(sc_num-sc_denum); 359 360 tmpScaleFactor = schur_div((stereoScaleFactor<<(sc_num))>>1, 361 tmpScaleFactor<<sc_denum, 362 16) ; 363 364 /* prevent odd scaling for next sqrt calculation */ 365 if (sc&0x1) { 366 sc++; 367 tmpScaleFactor>>=1; 368 } 369 stereoScaleFactor = sqrtFixp(tmpScaleFactor); 370 stereoScaleFactor <<= (sc>>1); 371 } 372 else { 373 stereoScaleFactor = maxStereoScaleFactor; 374 } 375 376 /* write data to hybrid output */ 377 tmpHybrid[0][k] = fMultDiv2(stereoScaleFactor, (FIXP_QMF)(tmpLeftReal + tmpRightReal))>>dynScale; 378 tmpHybrid[1][k] = fMultDiv2(stereoScaleFactor, (FIXP_QMF)(tmpLeftImag + tmpRightImag))>>dynScale; 379 380 } /* hybrid bands - k */ 381 382 FDKhybridSynthesisApply( 383 &hParametricStereo->fdkHybSynFilter, 384 tmpHybrid[0], 385 tmpHybrid[1], 386 mixRealQmfData[n], 387 mixImagQmfData[n]); 388 389 qmfSynthesisFilteringSlot( 390 sbrSynthQmf, 391 mixRealQmfData[n], 392 mixImagQmfData[n], 393 downmixScale-7, 394 downmixScale-7, 395 downsampledOutSignal+(n*sbrSynthQmf->no_channels), 396 1, 397 pWorkBuffer); 398 399 } /* slots */ 400 401 *qmfScale = -downmixScale + 7; 402 403 C_AALLOC_SCRATCH_END(pWorkBuffer, FIXP_QMF, 2*QMF_CHANNELS) 404 405 { 406 const INT noQmfSlots2 = hParametricStereo->noQmfSlots>>1; 407 const int noQmfBands = hParametricStereo->noQmfBands; 408 409 INT scale, i, j, slotOffset; 410 411 FIXP_QMF tmp[2][QMF_CHANNELS]; 412 413 for (i=0; i<noQmfSlots2; i++) { 414 FDKmemcpy(tmp[0], hParametricStereo->qmfDelayLines[0][i], noQmfBands*sizeof(FIXP_QMF)); 415 FDKmemcpy(tmp[1], hParametricStereo->qmfDelayLines[1][i], noQmfBands*sizeof(FIXP_QMF)); 416 417 FDKmemcpy(hParametricStereo->qmfDelayLines[0][i], mixRealQmfData[i+noQmfSlots2], noQmfBands*sizeof(FIXP_QMF)); 418 FDKmemcpy(hParametricStereo->qmfDelayLines[1][i], mixImagQmfData[i+noQmfSlots2], noQmfBands*sizeof(FIXP_QMF)); 419 420 FDKmemcpy(mixRealQmfData[i+noQmfSlots2], mixRealQmfData[i], noQmfBands*sizeof(FIXP_QMF)); 421 FDKmemcpy(mixImagQmfData[i+noQmfSlots2], mixImagQmfData[i], noQmfBands*sizeof(FIXP_QMF)); 422 423 FDKmemcpy(mixRealQmfData[i], tmp[0], noQmfBands*sizeof(FIXP_QMF)); 424 FDKmemcpy(mixImagQmfData[i], tmp[1], noQmfBands*sizeof(FIXP_QMF)); 425 } 426 427 if (hParametricStereo->qmfDelayScale > *qmfScale) { 428 scale = hParametricStereo->qmfDelayScale - *qmfScale; 429 slotOffset = 0; 430 } 431 else { 432 scale = *qmfScale - hParametricStereo->qmfDelayScale; 433 slotOffset = noQmfSlots2; 434 } 435 436 for (i=0; i<noQmfSlots2; i++) { 437 for (j=0; j<noQmfBands; j++) { 438 mixRealQmfData[i+slotOffset][j] >>= scale; 439 mixImagQmfData[i+slotOffset][j] >>= scale; 440 } 441 } 442 443 scale = *qmfScale; 444 *qmfScale = FDKmin(*qmfScale, hParametricStereo->qmfDelayScale); 445 hParametricStereo->qmfDelayScale = scale; 446 } 447 448 } /* valid handle */ 449 450 return error; 451 } 452 453 454 INT FDKsbrEnc_PSEnc_WritePSData( 455 HANDLE_PARAMETRIC_STEREO hParametricStereo, 456 HANDLE_FDK_BITSTREAM hBitstream 457 ) 458 { 459 return ( (hParametricStereo!=NULL) ? FDKsbrEnc_WritePSBitstream(&hParametricStereo->psOut[0], hBitstream) : 0 ); 460 } 461 462 463 FDK_PSENC_ERROR FDKsbrEnc_PSEnc_ParametricStereoProcessing( 464 HANDLE_PARAMETRIC_STEREO hParametricStereo, 465 INT_PCM *samples[2], 466 UINT timeInStride, 467 QMF_FILTER_BANK **hQmfAnalysis, 468 FIXP_QMF **RESTRICT downmixedRealQmfData, 469 FIXP_QMF **RESTRICT downmixedImagQmfData, 470 INT_PCM *downsampledOutSignal, 471 HANDLE_QMF_FILTER_BANK sbrSynthQmf, 472 SCHAR *qmfScale, 473 const int sendHeader 474 ) 475 { 476 FDK_PSENC_ERROR error = PSENC_OK; 477 INT psQmfScale[MAX_PS_CHANNELS] = {0}; 478 int psCh, i; 479 C_AALLOC_SCRATCH_START(pWorkBuffer, FIXP_QMF, 4*QMF_CHANNELS) 480 481 for (psCh = 0; psCh<MAX_PS_CHANNELS; psCh ++) { 482 483 for (i = 0; i < hQmfAnalysis[psCh]->no_col; i++) { 484 485 qmfAnalysisFilteringSlot( 486 hQmfAnalysis[psCh], 487 &pWorkBuffer[2*QMF_CHANNELS], /* qmfReal[QMF_CHANNELS] */ 488 &pWorkBuffer[3*QMF_CHANNELS], /* qmfImag[QMF_CHANNELS] */ 489 samples[psCh]+i*(hQmfAnalysis[psCh]->no_channels*timeInStride), 490 timeInStride, 491 &pWorkBuffer[0*QMF_CHANNELS] /* qmf workbuffer 2*QMF_CHANNELS */ 492 ); 493 494 FDKhybridAnalysisApply( 495 &hParametricStereo->fdkHybAnaFilter[psCh], 496 &pWorkBuffer[2*QMF_CHANNELS], /* qmfReal[QMF_CHANNELS] */ 497 &pWorkBuffer[3*QMF_CHANNELS], /* qmfImag[QMF_CHANNELS] */ 498 hParametricStereo->pHybridData[i+HYBRID_READ_OFFSET][psCh][0], 499 hParametricStereo->pHybridData[i+HYBRID_READ_OFFSET][psCh][1] 500 ); 501 502 } /* no_col loop i */ 503 504 psQmfScale[psCh] = hQmfAnalysis[psCh]->outScalefactor; 505 506 } /* for psCh */ 507 508 C_AALLOC_SCRATCH_END(pWorkBuffer, FIXP_QMF, 4*QMF_CHANNELS) 509 510 /* find best scaling in new QMF and Hybrid data */ 511 psFindBestScaling( hParametricStereo, 512 &hParametricStereo->pHybridData[HYBRID_READ_OFFSET], 513 hParametricStereo->dynBandScale, 514 hParametricStereo->maxBandValue, 515 &hParametricStereo->dmxScale ) ; 516 517 518 /* extract the ps parameters */ 519 if(PSENC_OK != (error = ExtractPSParameters(hParametricStereo, sendHeader, &hParametricStereo->pHybridData[0]))){ 520 goto bail; 521 } 522 523 /* save hybrid date for next frame */ 524 for (i=0; i<HYBRID_READ_OFFSET; i++) { 525 FDKmemcpy(hParametricStereo->pHybridData[i][0][0], hParametricStereo->pHybridData[HYBRID_FRAMESIZE+i][0][0], MAX_HYBRID_BANDS*sizeof(FIXP_DBL)); /* left, real */ 526 FDKmemcpy(hParametricStereo->pHybridData[i][0][1], hParametricStereo->pHybridData[HYBRID_FRAMESIZE+i][0][1], MAX_HYBRID_BANDS*sizeof(FIXP_DBL)); /* left, imag */ 527 FDKmemcpy(hParametricStereo->pHybridData[i][1][0], hParametricStereo->pHybridData[HYBRID_FRAMESIZE+i][1][0], MAX_HYBRID_BANDS*sizeof(FIXP_DBL)); /* right, real */ 528 FDKmemcpy(hParametricStereo->pHybridData[i][1][1], hParametricStereo->pHybridData[HYBRID_FRAMESIZE+i][1][1], MAX_HYBRID_BANDS*sizeof(FIXP_DBL)); /* right, imag */ 529 } 530 531 /* downmix and hybrid synthesis */ 532 if (PSENC_OK != (error = DownmixPSQmfData(hParametricStereo, sbrSynthQmf, downmixedRealQmfData, downmixedImagQmfData, downsampledOutSignal, &hParametricStereo->pHybridData[HYBRID_READ_OFFSET], hParametricStereo->noQmfSlots, psQmfScale, qmfScale))) { 533 goto bail; 534 } 535 536 bail: 537 538 return error; 539 } 540 541 static void psFindBestScaling( 542 HANDLE_PARAMETRIC_STEREO hParametricStereo, 543 FIXP_DBL *hybridData[HYBRID_FRAMESIZE][MAX_PS_CHANNELS][2], 544 UCHAR *dynBandScale, 545 FIXP_QMF *maxBandValue, 546 SCHAR *dmxScale 547 ) 548 { 549 HANDLE_PS_ENCODE hPsEncode = hParametricStereo->hPsEncode; 550 551 INT group, bin, col, band; 552 const INT frameSize = hParametricStereo->noQmfSlots; 553 const INT psBands = (INT) hPsEncode->psEncMode; 554 const INT nIidGroups = hPsEncode->nQmfIidGroups + hPsEncode->nSubQmfIidGroups; 555 556 /* group wise scaling */ 557 FIXP_QMF maxVal [2][PS_MAX_BANDS]; 558 FIXP_QMF maxValue = FL2FXCONST_DBL(0.f); 559 560 FDKmemclear(maxVal, sizeof(maxVal)); 561 562 /* start with hybrid data */ 563 for (group=0; group < nIidGroups; group++) { 564 /* Translate group to bin */ 565 bin = hPsEncode->subband2parameterIndex[group]; 566 567 /* Translate from 20 bins to 10 bins */ 568 if (hPsEncode->psEncMode == PS_BANDS_COARSE) { 569 bin >>= 1; 570 } 571 572 /* QMF downmix scaling */ 573 { 574 FIXP_QMF tmp = maxVal[0][bin]; 575 int i; 576 for (col=0; col<frameSize-HYBRID_READ_OFFSET; col++) { 577 for (i = hPsEncode->iidGroupBorders[group]; i < hPsEncode->iidGroupBorders[group+1]; i++) { 578 tmp = fixMax(tmp, (FIXP_QMF)fixp_abs(hybridData[col][0][0][i])); 579 tmp = fixMax(tmp, (FIXP_QMF)fixp_abs(hybridData[col][0][1][i])); 580 tmp = fixMax(tmp, (FIXP_QMF)fixp_abs(hybridData[col][1][0][i])); 581 tmp = fixMax(tmp, (FIXP_QMF)fixp_abs(hybridData[col][1][1][i])); 582 } 583 } 584 maxVal[0][bin] = tmp; 585 586 tmp = maxVal[1][bin]; 587 for (col=frameSize-HYBRID_READ_OFFSET; col<frameSize; col++) { 588 for (i = hPsEncode->iidGroupBorders[group]; i < hPsEncode->iidGroupBorders[group+1]; i++) { 589 tmp = fixMax(tmp, (FIXP_QMF)fixp_abs(hybridData[col][0][0][i])); 590 tmp = fixMax(tmp, (FIXP_QMF)fixp_abs(hybridData[col][0][1][i])); 591 tmp = fixMax(tmp, (FIXP_QMF)fixp_abs(hybridData[col][1][0][i])); 592 tmp = fixMax(tmp, (FIXP_QMF)fixp_abs(hybridData[col][1][1][i])); 593 } 594 } 595 maxVal[1][bin] = tmp; 596 } 597 } /* nIidGroups */ 598 599 /* convert maxSpec to maxScaling, find scaling space */ 600 for (band=0; band<psBands; band++) { 601 #ifndef MULT_16x16 602 dynBandScale[band] = CountLeadingBits(fixMax(maxVal[0][band],maxBandValue[band])); 603 #else 604 dynBandScale[band] = fixMax(0,CountLeadingBits(fixMax(maxVal[0][band],maxBandValue[band]))-FRACT_BITS); 605 #endif 606 maxValue = fixMax(maxValue,fixMax(maxVal[0][band],maxVal[1][band])); 607 maxBandValue[band] = fixMax(maxVal[0][band], maxVal[1][band]); 608 } 609 610 /* calculate maximal scaling for QMF downmix */ 611 #ifndef MULT_16x16 612 *dmxScale = fixMin(DFRACT_BITS, CountLeadingBits(maxValue)); 613 #else 614 *dmxScale = fixMax(0,fixMin(FRACT_BITS, CountLeadingBits(FX_QMF2FX_DBL(maxValue)))); 615 #endif 616 617 } 618 619
