1 2/* ----------------------------------------------------------------------------------------------------------- 3Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5� Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur F�rderung der angewandten Forschung e.V. 6 All rights reserved. 7 8 1. INTRODUCTION 9The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements 10the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. 11This FDK AAC Codec software is intended to be used on a wide variety of Android devices. 12 13AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual 14audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by 15independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part 16of the MPEG specifications. 17 18Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) 19may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners 20individually for the purpose of encoding or decoding bit streams in products that are compliant with 21the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license 22these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec 23software may already be covered under those patent licenses when it is used for those licensed purposes only. 24 25Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, 26are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional 27applications information and documentation. 28 292. COPYRIGHT LICENSE 30 31Redistribution and use in source and binary forms, with or without modification, are permitted without 32payment of copyright license fees provided that you satisfy the following conditions: 33 34You must retain the complete text of this software license in redistributions of the FDK AAC Codec or 35your modifications thereto in source code form. 36 37You must retain the complete text of this software license in the documentation and/or other materials 38provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. 39You must make available free of charge copies of the complete source code of the FDK AAC Codec and your 40modifications thereto to recipients of copies in binary form. 41 42The name of Fraunhofer may not be used to endorse or promote products derived from this library without 43prior written permission. 44 45You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec 46software or your modifications thereto. 47 48Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software 49and 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." 52 533. NO PATENT LICENSE 54 55NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, 56ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with 57respect to this software. 58 59You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized 60by appropriate patent licenses. 61 624. DISCLAIMER 63 64This 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 66of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 67CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, 68including but not limited to procurement of substitute goods or services; loss of use, data, or profits, 69or business interruption, however caused and on any theory of liability, whether in contract, strict 70liability, or tort (including negligence), arising in any way out of the use of this software, even if 71advised of the possibility of such damage. 72 735. CONTACT INFORMATION 74 75Fraunhofer Institute for Integrated Circuits IIS 76Attention: Audio and Multimedia Departments - FDK AAC LL 77Am Wolfsmantel 33 7891058 Erlangen, Germany 79 80www.iis.fraunhofer.de/amm 81amm-info@iis.fraunhofer.de 82----------------------------------------------------------------------------------------------------------- */ 83 84/***************************** MPEG-4 AAC Decoder ************************** 85 86 Author(s): Manuel Jander 87 Description: 88 89******************************************************************************/ 90 91#include "aacdecoder_lib.h" 92 93#include "aac_ram.h" 94#include "aacdecoder.h" 95#include "tpdec_lib.h" 96#include "FDK_core.h" /* FDK_tools version info */ 97 98 99 #include "sbrdecoder.h" 100 101 102 103 104#include "conceal.h" 105 106 #include "aacdec_drc.h" 107 108 109 110/* Decoder library info */ 111#define AACDECODER_LIB_VL0 2 112#define AACDECODER_LIB_VL1 5 113#define AACDECODER_LIB_VL2 10 114#define AACDECODER_LIB_TITLE "AAC Decoder Lib" 115#define AACDECODER_LIB_BUILD_DATE __DATE__ 116#define AACDECODER_LIB_BUILD_TIME __TIME__ 117 118static AAC_DECODER_ERROR 119setConcealMethod ( const HANDLE_AACDECODER self, 120 const INT method ); 121 122 123LINKSPEC_CPP AAC_DECODER_ERROR aacDecoder_GetFreeBytes ( const HANDLE_AACDECODER self, UINT *pFreeBytes){ 124 125 /* reset free bytes */ 126 *pFreeBytes = 0; 127 128 /* check handle */ 129 if(!self) 130 return AAC_DEC_INVALID_HANDLE; 131 132 /* return nr of free bytes */ 133 HANDLE_FDK_BITSTREAM hBs = transportDec_GetBitstream(self->hInput, 0); 134 *pFreeBytes = FDKgetFreeBits(hBs) >> 3; 135 136 /* success */ 137 return AAC_DEC_OK; 138} 139 140/** 141 * Config Decoder using a CSAudioSpecificConfig struct. 142 */ 143static 144LINKSPEC_CPP AAC_DECODER_ERROR aacDecoder_Config(HANDLE_AACDECODER self, const CSAudioSpecificConfig *pAscStruct) 145{ 146 AAC_DECODER_ERROR err; 147 148 /* Initialize AAC core decoder, and update self->streaminfo */ 149 err = CAacDecoder_Init(self, pAscStruct); 150 151 return err; 152} 153 154LINKSPEC_CPP AAC_DECODER_ERROR aacDecoder_ConfigRaw ( 155 HANDLE_AACDECODER self, 156 UCHAR *conf[], 157 const UINT length[] ) 158{ 159 AAC_DECODER_ERROR err = AAC_DEC_OK; 160 TRANSPORTDEC_ERROR errTp; 161 UINT layer, nrOfLayers = self->nrOfLayers; 162 163 for(layer = 0; layer < nrOfLayers; layer++){ 164 if(length[layer] > 0){ 165 errTp = transportDec_OutOfBandConfig(self->hInput, conf[layer], length[layer], layer); 166 if (errTp != TRANSPORTDEC_OK) { 167 switch (errTp) { 168 case TRANSPORTDEC_NEED_TO_RESTART: 169 err = AAC_DEC_NEED_TO_RESTART; 170 break; 171 case TRANSPORTDEC_UNSUPPORTED_FORMAT: 172 err = AAC_DEC_UNSUPPORTED_FORMAT; 173 break; 174 default: 175 err = AAC_DEC_UNKNOWN; 176 break; 177 } 178 /* if baselayer is OK we continue decoding */ 179 if(layer >= 1){ 180 self->nrOfLayers = layer; 181 } 182 break; 183 } 184 } 185 } 186 187 return err; 188} 189 190 191 192static INT aacDecoder_ConfigCallback(void *handle, const CSAudioSpecificConfig *pAscStruct) 193{ 194 HANDLE_AACDECODER self = (HANDLE_AACDECODER)handle; 195 AAC_DECODER_ERROR err = AAC_DEC_OK; 196 TRANSPORTDEC_ERROR errTp; 197 198 { 199 { 200 err = aacDecoder_Config(self, pAscStruct); 201 } 202 } 203 if (err == AAC_DEC_OK) { 204 if ( self->flags & (AC_USAC|AC_RSVD50|AC_LD|AC_ELD) 205 && CConcealment_GetDelay(&self->concealCommonData) > 0 ) 206 { 207 /* Revert to error concealment method Noise Substitution. 208 Because interpolation is not implemented for USAC/RSVD50 or 209 the additional delay is unwanted for low delay codecs. */ 210 setConcealMethod(self, 1); 211#ifdef DEBUG 212 FDKprintf(" Concealment method was reverted to 1 !\n"); 213#endif 214 } 215 errTp = TRANSPORTDEC_OK; 216 } else { 217 if (IS_INIT_ERROR(err)) { 218 errTp = TRANSPORTDEC_UNSUPPORTED_FORMAT; 219 } /* Fatal errors */ 220 else if (err == AAC_DEC_NEED_TO_RESTART) { 221 errTp = TRANSPORTDEC_NEED_TO_RESTART; 222 } else { 223 errTp = TRANSPORTDEC_UNKOWN_ERROR; 224 } 225 } 226 227 return errTp; 228} 229 230 231 232LINKSPEC_CPP AAC_DECODER_ERROR 233aacDecoder_AncDataInit ( HANDLE_AACDECODER self, 234 UCHAR *buffer, 235 int size ) 236{ 237 CAncData *ancData = &self->ancData; 238 239 return CAacDecoder_AncDataInit(ancData, buffer, size); 240} 241 242 243LINKSPEC_CPP AAC_DECODER_ERROR 244aacDecoder_AncDataGet ( HANDLE_AACDECODER self, 245 int index, 246 UCHAR **ptr, 247 int *size ) 248{ 249 CAncData *ancData = &self->ancData; 250 251 return CAacDecoder_AncDataGet(ancData, index, ptr, size); 252} 253 254 255static AAC_DECODER_ERROR 256setConcealMethod ( const HANDLE_AACDECODER self, /*!< Handle of the decoder instance */ 257 const INT method ) 258{ 259 AAC_DECODER_ERROR errorStatus = AAC_DEC_OK; 260 CConcealParams *pConcealData = NULL; 261 HANDLE_SBRDECODER hSbrDec = NULL; 262 HANDLE_AAC_DRC hDrcInfo = NULL; 263 HANDLE_PCM_DOWNMIX hPcmDmx = NULL; 264 CConcealmentMethod backupMethod = ConcealMethodNone; 265 int backupDelay = 0; 266 int bsDelay = 0; 267 268 /* check decoder handle */ 269 if (self != NULL) { 270 pConcealData = &self->concealCommonData; 271 hSbrDec = self->hSbrDecoder; 272 hDrcInfo = self->hDrcInfo; 273 hPcmDmx = self->hPcmUtils; 274 } 275 276 277 /* Get current method/delay */ 278 backupMethod = CConcealment_GetMethod(pConcealData); 279 backupDelay = CConcealment_GetDelay(pConcealData); 280 281 /* Be sure to set AAC and SBR concealment method simultaneously! */ 282 errorStatus = 283 CConcealment_SetParams( 284 pConcealData, 285 (int)method, // concealMethod 286 AACDEC_CONCEAL_PARAM_NOT_SPECIFIED, // concealFadeOutSlope 287 AACDEC_CONCEAL_PARAM_NOT_SPECIFIED, // concealFadeInSlope 288 AACDEC_CONCEAL_PARAM_NOT_SPECIFIED, // concealMuteRelease 289 AACDEC_CONCEAL_PARAM_NOT_SPECIFIED // concealComfNoiseLevel 290 ); 291 if ( (errorStatus != AAC_DEC_OK) 292 && (errorStatus != AAC_DEC_INVALID_HANDLE) ) { 293 goto bail; 294 } 295 296 /* Get new delay */ 297 bsDelay = CConcealment_GetDelay(pConcealData); 298 299 { 300 SBR_ERROR sbrErr = SBRDEC_OK; 301 302 /* set SBR bitstream delay */ 303 sbrErr = sbrDecoder_SetParam ( 304 hSbrDec, 305 SBR_SYSTEM_BITSTREAM_DELAY, 306 bsDelay 307 ); 308 309 switch (sbrErr) { 310 case SBRDEC_OK: 311 case SBRDEC_NOT_INITIALIZED: 312 if (self != NULL) { 313 /* save the param value and set later 314 (when SBR has been initialized) */ 315 self->sbrParams.bsDelay = bsDelay; 316 } 317 break; 318 default: 319 errorStatus = AAC_DEC_SET_PARAM_FAIL; 320 goto bail; 321 } 322 } 323 324 errorStatus = 325 aacDecoder_drcSetParam ( 326 hDrcInfo, 327 DRC_BS_DELAY, 328 bsDelay 329 ); 330 if ( (errorStatus != AAC_DEC_OK) 331 && (errorStatus != AAC_DEC_INVALID_HANDLE) ) { 332 goto bail; 333 } 334 335 if (errorStatus == AAC_DEC_OK) { 336 PCMDMX_ERROR err = 337 pcmDmx_SetParam ( 338 hPcmDmx, 339 DMX_BS_DATA_DELAY, 340 bsDelay 341 ); 342 switch (err) { 343 case PCMDMX_INVALID_HANDLE: 344 errorStatus = AAC_DEC_INVALID_HANDLE; 345 case PCMDMX_OK: 346 break; 347 default: 348 errorStatus = AAC_DEC_SET_PARAM_FAIL; 349 goto bail; 350 } 351 } 352 353 354bail: 355 if ( (errorStatus != AAC_DEC_OK) 356 && (errorStatus != AAC_DEC_INVALID_HANDLE) ) 357 { 358 /* Revert to the initial state */ 359 CConcealment_SetParams ( 360 pConcealData, 361 (int)backupMethod, 362 AACDEC_CONCEAL_PARAM_NOT_SPECIFIED, 363 AACDEC_CONCEAL_PARAM_NOT_SPECIFIED, 364 AACDEC_CONCEAL_PARAM_NOT_SPECIFIED, 365 AACDEC_CONCEAL_PARAM_NOT_SPECIFIED 366 ); 367 /* Revert SBR bitstream delay */ 368 sbrDecoder_SetParam ( 369 hSbrDec, 370 SBR_SYSTEM_BITSTREAM_DELAY, 371 backupDelay 372 ); 373 /* Revert DRC bitstream delay */ 374 aacDecoder_drcSetParam ( 375 hDrcInfo, 376 DRC_BS_DELAY, 377 backupDelay 378 ); 379 /* Revert PCM mixdown bitstream delay */ 380 pcmDmx_SetParam ( 381 hPcmDmx, 382 DMX_BS_DATA_DELAY, 383 backupDelay 384 ); 385 } 386 387 return errorStatus; 388} 389 390 391LINKSPEC_CPP AAC_DECODER_ERROR 392aacDecoder_SetParam ( const HANDLE_AACDECODER self, /*!< Handle of the decoder instance */ 393 const AACDEC_PARAM param, /*!< Parameter to set */ 394 const INT value) /*!< Parameter valued */ 395{ 396 AAC_DECODER_ERROR errorStatus = AAC_DEC_OK; 397 CConcealParams *pConcealData = NULL; 398 HANDLE_AAC_DRC hDrcInfo = NULL; 399 HANDLE_PCM_DOWNMIX hPcmDmx = NULL; 400 TDLimiterPtr hPcmTdl = NULL; 401 402 /* check decoder handle */ 403 if (self != NULL) { 404 pConcealData = &self->concealCommonData; 405 hDrcInfo = self->hDrcInfo; 406 hPcmDmx = self->hPcmUtils; 407 hPcmTdl = self->hLimiter; 408 } else { 409 errorStatus = AAC_DEC_INVALID_HANDLE; 410 } 411 412 /* configure the subsystems */ 413 switch (param) 414 { 415 case AAC_PCM_OUTPUT_INTERLEAVED: 416 if (value < 0 || value > 1) { 417 return AAC_DEC_SET_PARAM_FAIL; 418 } 419 if (self == NULL) { 420 return AAC_DEC_INVALID_HANDLE; 421 } 422 self->outputInterleaved = value; 423 break; 424 425 case AAC_PCM_MIN_OUTPUT_CHANNELS: 426 if (value < -1 || value > (8)) { 427 return AAC_DEC_SET_PARAM_FAIL; 428 } 429 { 430 PCMDMX_ERROR err; 431 432 err = pcmDmx_SetParam ( 433 hPcmDmx, 434 MIN_NUMBER_OF_OUTPUT_CHANNELS, 435 value ); 436 437 switch (err) { 438 case PCMDMX_OK: 439 break; 440 case PCMDMX_INVALID_HANDLE: 441 return AAC_DEC_INVALID_HANDLE; 442 default: 443 return AAC_DEC_SET_PARAM_FAIL; 444 } 445 } 446 break; 447 448 case AAC_PCM_MAX_OUTPUT_CHANNELS: 449 if (value < -1 || value > (8)) { 450 return AAC_DEC_SET_PARAM_FAIL; 451 } 452 { 453 PCMDMX_ERROR err; 454 455 err = pcmDmx_SetParam ( 456 hPcmDmx, 457 MAX_NUMBER_OF_OUTPUT_CHANNELS, 458 value ); 459 460 switch (err) { 461 case PCMDMX_OK: 462 break; 463 case PCMDMX_INVALID_HANDLE: 464 return AAC_DEC_INVALID_HANDLE; 465 default: 466 return AAC_DEC_SET_PARAM_FAIL; 467 } 468 } 469 break; 470 471 case AAC_PCM_DUAL_CHANNEL_OUTPUT_MODE: 472 { 473 PCMDMX_ERROR err; 474 475 err = pcmDmx_SetParam ( 476 hPcmDmx, 477 DMX_DUAL_CHANNEL_MODE, 478 value ); 479 480 switch (err) { 481 case PCMDMX_OK: 482 break; 483 case PCMDMX_INVALID_HANDLE: 484 return AAC_DEC_INVALID_HANDLE; 485 default: 486 return AAC_DEC_SET_PARAM_FAIL; 487 } 488 } 489 break; 490 491 492 case AAC_PCM_LIMITER_ENABLE: 493 if (value < -1 || value > 1) { 494 return AAC_DEC_SET_PARAM_FAIL; 495 } 496 if (self == NULL) { 497 return AAC_DEC_INVALID_HANDLE; 498 } 499 self->limiterEnableUser = value; 500 break; 501 502 case AAC_PCM_LIMITER_ATTACK_TIME: 503 if (value <= 0) { /* module function converts value to unsigned */ 504 return AAC_DEC_SET_PARAM_FAIL; 505 } 506 switch (setLimiterAttack(hPcmTdl, value)) { 507 case TDLIMIT_OK: 508 break; 509 case TDLIMIT_INVALID_HANDLE: 510 return AAC_DEC_INVALID_HANDLE; 511 case TDLIMIT_INVALID_PARAMETER: 512 default: 513 return AAC_DEC_SET_PARAM_FAIL; 514 } 515 break; 516 517 case AAC_PCM_LIMITER_RELEAS_TIME: 518 if (value <= 0) { /* module function converts value to unsigned */ 519 return AAC_DEC_SET_PARAM_FAIL; 520 } 521 switch (setLimiterRelease(hPcmTdl, value)) { 522 case TDLIMIT_OK: 523 break; 524 case TDLIMIT_INVALID_HANDLE: 525 return AAC_DEC_INVALID_HANDLE; 526 case TDLIMIT_INVALID_PARAMETER: 527 default: 528 return AAC_DEC_SET_PARAM_FAIL; 529 } 530 break; 531 532 case AAC_PCM_OUTPUT_CHANNEL_MAPPING: 533 switch (value) { 534 case 0: 535 if (self != NULL) { 536 self->channelOutputMapping = channelMappingTablePassthrough; 537 } 538 break; 539 case 1: 540 if (self != NULL) { 541 self->channelOutputMapping = channelMappingTableWAV; 542 } 543 break; 544 default: 545 errorStatus = AAC_DEC_SET_PARAM_FAIL; 546 break; 547 } 548 break; 549 550 551 case AAC_QMF_LOWPOWER: 552 if (value < -1 || value > 1) { 553 return AAC_DEC_SET_PARAM_FAIL; 554 } 555 if (self == NULL) { 556 return AAC_DEC_INVALID_HANDLE; 557 } 558 559 /** 560 * Set QMF mode (might be overriden) 561 * 0:HQ (complex) 562 * 1:LP (partially complex) 563 */ 564 self->qmfModeUser = (QMF_MODE)value; 565 break; 566 567 568 case AAC_DRC_ATTENUATION_FACTOR: 569 /* DRC compression factor (where 0 is no and 127 is max compression) */ 570 errorStatus = 571 aacDecoder_drcSetParam ( 572 hDrcInfo, 573 DRC_CUT_SCALE, 574 value 575 ); 576 break; 577 578 case AAC_DRC_BOOST_FACTOR: 579 /* DRC boost factor (where 0 is no and 127 is max boost) */ 580 errorStatus = 581 aacDecoder_drcSetParam ( 582 hDrcInfo, 583 DRC_BOOST_SCALE, 584 value 585 ); 586 break; 587 588 case AAC_DRC_REFERENCE_LEVEL: 589 /* DRC reference level quantized in 0.25dB steps using values [0..127] it is '-' for analog scaling */ 590 errorStatus = 591 aacDecoder_drcSetParam ( 592 hDrcInfo, 593 TARGET_REF_LEVEL, 594 value 595 ); 596 break; 597 598 case AAC_DRC_HEAVY_COMPRESSION: 599 /* Don't need to overwrite cut/boost values */ 600 errorStatus = 601 aacDecoder_drcSetParam ( 602 hDrcInfo, 603 APPLY_HEAVY_COMPRESSION, 604 value 605 ); 606 break; 607 608 609 case AAC_TPDEC_CLEAR_BUFFER: 610 transportDec_SetParam(self->hInput, TPDEC_PARAM_RESET, 1); 611 self->streamInfo.numLostAccessUnits = 0; 612 self->streamInfo.numBadBytes = 0; 613 self->streamInfo.numTotalBytes = 0; 614 /* aacDecoder_SignalInterruption(self); */ 615 break; 616 617 case AAC_CONCEAL_METHOD: 618 /* Changing the concealment method can introduce additional bitstream delay. And 619 that in turn affects sub libraries and modules which makes the whole thing quite 620 complex. So the complete changing routine is packed into a helper function which 621 keeps all modules and libs in a consistent state even in the case an error occures. */ 622 errorStatus = setConcealMethod ( self, value ); 623 break; 624 625 default: 626 return AAC_DEC_SET_PARAM_FAIL; 627 } /* switch(param) */ 628 629 return (errorStatus); 630} 631 632 633LINKSPEC_CPP HANDLE_AACDECODER aacDecoder_Open(TRANSPORT_TYPE transportFmt, UINT nrOfLayers) 634{ 635 AAC_DECODER_INSTANCE *aacDec = NULL; 636 HANDLE_TRANSPORTDEC pIn; 637 int err = 0; 638 639 /* Allocate transport layer struct. */ 640 pIn = transportDec_Open(transportFmt, TP_FLAG_MPEG4); 641 if (pIn == NULL) { 642 return NULL; 643 } 644 645 transportDec_SetParam(pIn, TPDEC_PARAM_IGNORE_BUFFERFULLNESS, 1); 646 647 /* Allocate AAC decoder core struct. */ 648 aacDec = CAacDecoder_Open(transportFmt); 649 650 if (aacDec == NULL) { 651 transportDec_Close(&pIn); 652 goto bail; 653 } 654 aacDec->hInput = pIn; 655 656 aacDec->nrOfLayers = nrOfLayers; 657 658 aacDec->channelOutputMapping = channelMappingTableWAV; 659 660 /* Register Config Update callback. */ 661 transportDec_RegisterAscCallback(pIn, aacDecoder_ConfigCallback, (void*)aacDec); 662 663 /* open SBR decoder */ 664 if ( SBRDEC_OK != sbrDecoder_Open ( &aacDec->hSbrDecoder )) { 665 err = -1; 666 goto bail; 667 } 668 aacDec->qmfModeUser = NOT_DEFINED; 669 transportDec_RegisterSbrCallback(aacDec->hInput, (cbSbr_t)sbrDecoder_Header, (void*)aacDec->hSbrDecoder); 670 671 672 pcmDmx_Open( &aacDec->hPcmUtils ); 673 if (aacDec->hPcmUtils == NULL) { 674 err = -1; 675 goto bail; 676 } 677 678 aacDec->hLimiter = createLimiter(TDL_ATTACK_DEFAULT_MS, TDL_RELEASE_DEFAULT_MS, SAMPLE_MAX, (8), 96000); 679 if (NULL == aacDec->hLimiter) { 680 err = -1; 681 goto bail; 682 } 683 aacDec->limiterEnableUser = (UCHAR)-1; 684 aacDec->limiterEnableCurr = 0; 685 686 687 688 /* Assure that all modules have same delay */ 689 if ( setConcealMethod(aacDec, CConcealment_GetMethod(&aacDec->concealCommonData)) ) { 690 err = -1; 691 goto bail; 692 } 693 694bail: 695 if (err == -1) { 696 aacDecoder_Close(aacDec); 697 aacDec = NULL; 698 } 699 return aacDec; 700} 701 702LINKSPEC_CPP AAC_DECODER_ERROR aacDecoder_Fill( 703 HANDLE_AACDECODER self, 704 UCHAR *pBuffer[], 705 const UINT bufferSize[], 706 UINT *pBytesValid 707 ) 708{ 709 TRANSPORTDEC_ERROR tpErr; 710 /* loop counter for layers; if not TT_MP4_RAWPACKETS used as index for only 711 available layer */ 712 INT layer = 0; 713 INT nrOfLayers = self->nrOfLayers; 714 715 { 716 for (layer = 0; layer < nrOfLayers; layer++){ 717 { 718 tpErr = transportDec_FillData( self->hInput, pBuffer[layer], bufferSize[layer], &pBytesValid[layer], layer ); 719 if (tpErr != TRANSPORTDEC_OK) { 720 return AAC_DEC_UNKNOWN; /* Must be an internal error */ 721 } 722 } 723 } 724 } 725 726 return AAC_DEC_OK; 727} 728 729 730static void aacDecoder_SignalInterruption(HANDLE_AACDECODER self) 731{ 732 CAacDecoder_SignalInterruption(self); 733 734 if ( self->hSbrDecoder != NULL ) { 735 sbrDecoder_SetParam(self->hSbrDecoder, SBR_BS_INTERRUPTION, 0); 736 } 737} 738 739static void aacDecoder_UpdateBitStreamCounters(CStreamInfo *pSi, HANDLE_FDK_BITSTREAM hBs, int nBits, AAC_DECODER_ERROR ErrorStatus) 740{ 741 /* calculate bit difference (amount of bits moved forward) */ 742 nBits = nBits - FDKgetValidBits(hBs); 743 744 /* Note: The amount of bits consumed might become negative when parsing a 745 bit stream with several sub frames, and we find out at the last sub frame 746 that the total frame length does not match the sum of sub frame length. 747 If this happens, the transport decoder might want to rewind to the supposed 748 ending of the transport frame, and this position might be before the last 749 access unit beginning. */ 750 751 /* Calc bitrate. */ 752 if (pSi->frameSize > 0) { 753 pSi->bitRate = (nBits * pSi->sampleRate)/pSi->frameSize; 754 } 755 756 /* bit/byte counters */ 757 { 758 int nBytes; 759 760 nBytes = nBits>>3; 761 pSi->numTotalBytes += nBytes; 762 if (IS_OUTPUT_VALID(ErrorStatus)) { 763 pSi->numTotalAccessUnits++; 764 } 765 if (IS_DECODE_ERROR(ErrorStatus)) { 766 pSi->numBadBytes += nBytes; 767 pSi->numBadAccessUnits++; 768 } 769 } 770} 771 772static INT aacDecoder_EstimateNumberOfLostFrames(HANDLE_AACDECODER self) 773{ 774 INT n; 775 776 transportDec_GetMissingAccessUnitCount( &n, self->hInput); 777 778 return n; 779} 780 781LINKSPEC_CPP AAC_DECODER_ERROR aacDecoder_DecodeFrame( 782 HANDLE_AACDECODER self, 783 INT_PCM *pTimeData, 784 const INT timeDataSize, 785 const UINT flags) 786{ 787 AAC_DECODER_ERROR ErrorStatus; 788 INT layer; 789 INT nBits; 790 INT interleaved = self->outputInterleaved; 791 HANDLE_FDK_BITSTREAM hBs; 792 int fTpInterruption = 0; /* Transport originated interruption detection. */ 793 int fTpConceal = 0; /* Transport originated concealment. */ 794 795 796 if (self == NULL) { 797 return AAC_DEC_INVALID_HANDLE; 798 } 799 800 if (flags & AACDEC_INTR) { 801 self->streamInfo.numLostAccessUnits = 0; 802 } 803 804 hBs = transportDec_GetBitstream(self->hInput, 0); 805 806 /* Get current bits position for bitrate calculation. */ 807 nBits = FDKgetValidBits(hBs); 808 if (! (flags & (AACDEC_CONCEAL | AACDEC_FLUSH) ) ) 809 { 810 TRANSPORTDEC_ERROR err; 811 812 for(layer = 0; layer < self->nrOfLayers; layer++) 813 { 814 err = transportDec_ReadAccessUnit(self->hInput, layer); 815 if (err != TRANSPORTDEC_OK) { 816 switch (err) { 817 case TRANSPORTDEC_NOT_ENOUGH_BITS: 818 ErrorStatus = AAC_DEC_NOT_ENOUGH_BITS; 819 goto bail; 820 case TRANSPORTDEC_SYNC_ERROR: 821 self->streamInfo.numLostAccessUnits = aacDecoder_EstimateNumberOfLostFrames(self); 822 fTpInterruption = 1; 823 break; 824 case TRANSPORTDEC_NEED_TO_RESTART: 825 ErrorStatus = AAC_DEC_NEED_TO_RESTART; 826 goto bail; 827 case TRANSPORTDEC_CRC_ERROR: 828 fTpConceal = 1; 829 break; 830 default: 831 ErrorStatus = AAC_DEC_UNKNOWN; 832 goto bail; 833 } 834 } 835 } 836 } else { 837 if (self->streamInfo.numLostAccessUnits > 0) { 838 self->streamInfo.numLostAccessUnits--; 839 } 840 } 841 842 /* Signal bit stream interruption to other modules if required. */ 843 if ( fTpInterruption || (flags & (AACDEC_INTR|AACDEC_CLRHIST)) ) 844 { 845 sbrDecoder_SetParam(self->hSbrDecoder, SBR_CLEAR_HISTORY, (flags&AACDEC_CLRHIST)); 846 aacDecoder_SignalInterruption(self); 847 if ( ! (flags & AACDEC_INTR) ) { 848 ErrorStatus = AAC_DEC_TRANSPORT_SYNC_ERROR; 849 goto bail; 850 } 851 } 852 853 /* Empty bit buffer in case of flush request. */ 854 if (flags & AACDEC_FLUSH) 855 { 856 transportDec_SetParam(self->hInput, TPDEC_PARAM_RESET, 1); 857 self->streamInfo.numLostAccessUnits = 0; 858 self->streamInfo.numBadBytes = 0; 859 self->streamInfo.numTotalBytes = 0; 860 } 861 /* Reset the output delay field. The modules will add their figures one after another. */ 862 self->streamInfo.outputDelay = 0; 863 864 if (self->limiterEnableUser==(UCHAR)-1) { 865 /* Enbale limiter for all non-lowdelay AOT's. */ 866 self->limiterEnableCurr = ( self->flags & (AC_LD|AC_ELD) ) ? 0 : 1; 867 } 868 else { 869 /* Use limiter configuration as requested. */ 870 self->limiterEnableCurr = self->limiterEnableUser; 871 } 872 /* reset limiter gain on a per frame basis */ 873 self->extGain[0] = FL2FXCONST_DBL(1.0f/(float)(1<<TDL_GAIN_SCALING)); 874 875 876 ErrorStatus = CAacDecoder_DecodeFrame(self, 877 flags | (fTpConceal ? AACDEC_CONCEAL : 0), 878 pTimeData, 879 timeDataSize, 880 interleaved); 881 882 if (!(flags & (AACDEC_CONCEAL|AACDEC_FLUSH))) { 883 TRANSPORTDEC_ERROR tpErr; 884 tpErr = transportDec_EndAccessUnit(self->hInput); 885 if (tpErr != TRANSPORTDEC_OK) { 886 self->frameOK = 0; 887 } 888 } 889 890 /* If the current pTimeData does not contain a valid signal, there nothing else we can do, so bail. */ 891 if ( ! IS_OUTPUT_VALID(ErrorStatus) ) { 892 goto bail; 893 } 894 895 { 896 /* Export data into streaminfo structure */ 897 self->streamInfo.sampleRate = self->streamInfo.aacSampleRate; 898 self->streamInfo.frameSize = self->streamInfo.aacSamplesPerFrame; 899 } 900 self->streamInfo.numChannels = self->streamInfo.aacNumChannels; 901 902 903 904 CAacDecoder_SyncQmfMode(self); 905 906/* sbr decoder */ 907 908 if (ErrorStatus || (flags & AACDEC_CONCEAL) || self->pAacDecoderStaticChannelInfo[0]->concealmentInfo.concealState > ConcealState_FadeIn) 909 { 910 self->frameOK = 0; /* if an error has occured do concealment in the SBR decoder too */ 911 } 912 913 if (self->sbrEnabled) 914 { 915 SBR_ERROR sbrError = SBRDEC_OK; 916 int chOutMapIdx = ((self->chMapIndex==0) && (self->streamInfo.numChannels<7)) ? self->streamInfo.numChannels : self->chMapIndex; 917 918 /* set params */ 919 sbrDecoder_SetParam ( self->hSbrDecoder, 920 SBR_SYSTEM_BITSTREAM_DELAY, 921 self->sbrParams.bsDelay); 922 sbrDecoder_SetParam ( self->hSbrDecoder, 923 SBR_FLUSH_DATA, 924 (flags & AACDEC_FLUSH) ); 925 926 if ( self->streamInfo.aot == AOT_ER_AAC_ELD ) { 927 /* Configure QMF */ 928 sbrDecoder_SetParam ( self->hSbrDecoder, 929 SBR_LD_QMF_TIME_ALIGN, 930 (self->flags & AC_LD_MPS) ? 1 : 0 ); 931 } 932 933 { 934 PCMDMX_ERROR dmxErr; 935 INT maxOutCh = 0; 936 937 dmxErr = pcmDmx_GetParam(self->hPcmUtils, MAX_NUMBER_OF_OUTPUT_CHANNELS, &maxOutCh); 938 if ( (dmxErr == PCMDMX_OK) && (maxOutCh == 1) ) { 939 /* Disable PS processing if we have to create a mono output signal. */ 940 self->psPossible = 0; 941 } 942 } 943 944 945 /* apply SBR processing */ 946 sbrError = sbrDecoder_Apply ( self->hSbrDecoder, 947 pTimeData, 948 &self->streamInfo.numChannels, 949 &self->streamInfo.sampleRate, 950 self->channelOutputMapping[chOutMapIdx], 951 interleaved, 952 self->frameOK, 953 &self->psPossible); 954 955 956 if (sbrError == SBRDEC_OK) { 957 #define UPS_SCALE 2 /* Maximum upsampling factor is 4 (CELP+SBR) */ 958 FIXP_DBL upsampleFactor = FL2FXCONST_DBL(1.0f/(1<<UPS_SCALE)); 959 960 /* Update data in streaminfo structure. Assume that the SBR upsampling factor is either 1 or 2 */ 961 self->flags |= AC_SBR_PRESENT; 962 if (self->streamInfo.aacSampleRate != self->streamInfo.sampleRate) { 963 if (self->streamInfo.frameSize == 768) { 964 upsampleFactor = FL2FXCONST_DBL(8.0f/(3<<UPS_SCALE)); 965 } else { 966 upsampleFactor = FL2FXCONST_DBL(2.0f/(1<<UPS_SCALE)); 967 } 968 } 969 /* Apply upsampling factor to both the core frame length and the core delay */ 970 self->streamInfo.frameSize = (INT)fMult((FIXP_DBL)self->streamInfo.aacSamplesPerFrame<<UPS_SCALE, upsampleFactor); 971 self->streamInfo.outputDelay = (UINT)(INT)fMult((FIXP_DBL)self->streamInfo.outputDelay<<UPS_SCALE, upsampleFactor); 972 self->streamInfo.outputDelay += sbrDecoder_GetDelay( self->hSbrDecoder ); 973 974 if (self->psPossible) { 975 self->flags |= AC_PS_PRESENT; 976 self->channelType[0] = ACT_FRONT; 977 self->channelType[1] = ACT_FRONT; 978 self->channelIndices[0] = 0; 979 self->channelIndices[1] = 1; 980 } 981 } 982 } 983 984 985 { 986 INT pcmLimiterScale = 0; 987 PCMDMX_ERROR dmxErr = PCMDMX_OK; 988 if ( flags & (AACDEC_INTR | AACDEC_CLRHIST) ) { 989 /* delete data from the past (e.g. mixdown coeficients) */ 990 pcmDmx_Reset( self->hPcmUtils, PCMDMX_RESET_BS_DATA ); 991 } 992 /* do PCM post processing */ 993 dmxErr = pcmDmx_ApplyFrame ( 994 self->hPcmUtils, 995 pTimeData, 996 self->streamInfo.frameSize, 997 &self->streamInfo.numChannels, 998 interleaved, 999 self->channelType, 1000 self->channelIndices, 1001 self->channelOutputMapping, 1002 (self->limiterEnableCurr) ? &pcmLimiterScale : NULL 1003 ); 1004 if (dmxErr == PCMDMX_INVALID_MODE) { 1005 /* Announce the framework that the current combination of channel configuration and downmix 1006 * settings are not know to produce a predictable behavior and thus maybe produce strange output. */ 1007 ErrorStatus = AAC_DEC_DECODE_FRAME_ERROR; 1008 } 1009 1010 if ( flags & AACDEC_CLRHIST ) { 1011 /* Delete the delayed signal. */ 1012 resetLimiter(self->hLimiter); 1013 } 1014 if (self->limiterEnableCurr) 1015 { 1016 /* Set actual signal parameters */ 1017 setLimiterNChannels(self->hLimiter, self->streamInfo.numChannels); 1018 setLimiterSampleRate(self->hLimiter, self->streamInfo.sampleRate); 1019 1020 applyLimiter( 1021 self->hLimiter, 1022 pTimeData, 1023 self->extGain, 1024 &pcmLimiterScale, 1025 1, 1026 self->extGainDelay, 1027 self->streamInfo.frameSize 1028 ); 1029 1030 /* Announce the additional limiter output delay */ 1031 self->streamInfo.outputDelay += getLimiterDelay(self->hLimiter); 1032 } 1033 } 1034 1035 1036 /* Signal interruption to take effect in next frame. */ 1037 if ( flags & AACDEC_FLUSH ) { 1038 aacDecoder_SignalInterruption(self); 1039 } 1040 1041 /* Update externally visible copy of flags */ 1042 self->streamInfo.flags = self->flags; 1043 1044bail: 1045 1046 /* Update Statistics */ 1047 aacDecoder_UpdateBitStreamCounters(&self->streamInfo, hBs, nBits, ErrorStatus); 1048 1049 return ErrorStatus; 1050} 1051 1052LINKSPEC_CPP void aacDecoder_Close ( HANDLE_AACDECODER self ) 1053{ 1054 if (self == NULL) 1055 return; 1056 1057 1058 if (self->hLimiter != NULL) { 1059 destroyLimiter(self->hLimiter); 1060 } 1061 1062 if (self->hPcmUtils != NULL) { 1063 pcmDmx_Close( &self->hPcmUtils ); 1064 } 1065 1066 1067 1068 if (self->hSbrDecoder != NULL) { 1069 sbrDecoder_Close(&self->hSbrDecoder); 1070 } 1071 1072 if (self->hInput != NULL) { 1073 transportDec_Close(&self->hInput); 1074 } 1075 1076 CAacDecoder_Close(self); 1077} 1078 1079 1080LINKSPEC_CPP CStreamInfo* aacDecoder_GetStreamInfo ( HANDLE_AACDECODER self ) 1081{ 1082 return CAacDecoder_GetStreamInfo(self); 1083} 1084 1085LINKSPEC_CPP INT aacDecoder_GetLibInfo ( LIB_INFO *info ) 1086{ 1087 int i; 1088 1089 if (info == NULL) { 1090 return -1; 1091 } 1092 1093 sbrDecoder_GetLibInfo( info ); 1094 transportDec_GetLibInfo( info ); 1095 FDK_toolsGetLibInfo( info ); 1096 pcmDmx_GetLibInfo( info ); 1097 1098 /* search for next free tab */ 1099 for (i = 0; i < FDK_MODULE_LAST; i++) { 1100 if (info[i].module_id == FDK_NONE) break; 1101 } 1102 if (i == FDK_MODULE_LAST) { 1103 return -1; 1104 } 1105 info += i; 1106 1107 info->module_id = FDK_AACDEC; 1108 /* build own library info */ 1109 info->version = LIB_VERSION(AACDECODER_LIB_VL0, AACDECODER_LIB_VL1, AACDECODER_LIB_VL2); 1110 LIB_VERSION_STRING(info); 1111 info->build_date = AACDECODER_LIB_BUILD_DATE; 1112 info->build_time = AACDECODER_LIB_BUILD_TIME; 1113 info->title = AACDECODER_LIB_TITLE; 1114 1115 /* Set flags */ 1116 info->flags = 0 1117 | CAPF_AAC_LC 1118 | CAPF_AAC_VCB11 1119 | CAPF_AAC_HCR 1120 | CAPF_AAC_RVLC 1121 | CAPF_ER_AAC_LD 1122 | CAPF_ER_AAC_ELD 1123 | CAPF_AAC_CONCEALMENT 1124 | CAPF_AAC_DRC 1125 1126 | CAPF_AAC_MPEG4 1127 1128 1129 | CAPF_AAC_1024 1130 | CAPF_AAC_960 1131 1132 | CAPF_AAC_512 1133 1134 | CAPF_AAC_480 1135 1136 ; 1137 /* End of flags */ 1138 1139 return 0; 1140} 1141 1142 1143 1144 1145