1 2 /* ----------------------------------------------------------------------------------------------------------- 3 Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5 Copyright 1995 - 2012 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-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 4 113 #define AACDECODER_LIB_VL2 7 114 #define AACDECODER_LIB_TITLE "AAC Decoder Lib" 115 #define AACDECODER_LIB_BUILD_DATE __DATE__ 116 #define AACDECODER_LIB_BUILD_TIME __TIME__ 117 118 static AAC_DECODER_ERROR 119 setConcealMethod ( const HANDLE_AACDECODER self, 120 const INT method ); 121 122 123 LINKSPEC_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 */ 143 static 144 LINKSPEC_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 } 153 154 LINKSPEC_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 } 189 190 191 192 static 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 } 229 230 231 232 LINKSPEC_CPP AAC_DECODER_ERROR 233 aacDecoder_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 } 241 242 243 LINKSPEC_CPP AAC_DECODER_ERROR 244 aacDecoder_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 } 253 254 255 static AAC_DECODER_ERROR 256 setConcealMethod ( 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; 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 } 352 353 354 bail: 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 } 389 390 391 LINKSPEC_CPP AAC_DECODER_ERROR 392 aacDecoder_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; 399 400 /* check decoder handle */ 401 if (self != NULL) { 402 pConcealData = &self->concealCommonData; 403 hDrcInfo = self->hDrcInfo; 404 } 405 406 /* configure the subsystems */ 407 switch (param) 408 { 409 case AAC_PCM_OUTPUT_INTERLEAVED: 410 if (value < 0 || value > 1) { 411 return AAC_DEC_SET_PARAM_FAIL; 412 } 413 if (self == NULL) { 414 return AAC_DEC_INVALID_HANDLE; 415 } 416 self->outputInterleaved = value; 417 break; 418 419 case AAC_PCM_OUTPUT_CHANNELS: 420 { 421 PCMDMX_ERROR err; 422 423 err = pcmDmx_SetParam ( 424 self->hPcmUtils, 425 NUMBER_OF_OUTPUT_CHANNELS, 426 value ); 427 428 switch (err) { 429 case PCMDMX_OK: 430 break; 431 case PCMDMX_INVALID_HANDLE: 432 return AAC_DEC_INVALID_HANDLE; 433 default: 434 return AAC_DEC_SET_PARAM_FAIL; 435 } 436 } 437 break; 438 439 case AAC_PCM_DUAL_CHANNEL_OUTPUT_MODE: 440 { 441 PCMDMX_ERROR err; 442 443 err = pcmDmx_SetParam ( 444 self->hPcmUtils, 445 DUAL_CHANNEL_DOWNMIX_MODE, 446 value ); 447 448 switch (err) { 449 case PCMDMX_OK: 450 break; 451 case PCMDMX_INVALID_HANDLE: 452 return AAC_DEC_INVALID_HANDLE; 453 default: 454 return AAC_DEC_SET_PARAM_FAIL; 455 } 456 } 457 break; 458 459 case AAC_PCM_OUTPUT_CHANNEL_MAPPING: 460 switch (value) { 461 case 0: 462 self->channelOutputMapping = channelMappingTablePassthrough; 463 break; 464 case 1: 465 self->channelOutputMapping = channelMappingTableWAV; 466 break; 467 default: 468 errorStatus = AAC_DEC_SET_PARAM_FAIL; 469 break; 470 } 471 break; 472 473 474 case AAC_QMF_LOWPOWER: 475 if (self == NULL) { 476 return AAC_DEC_INVALID_HANDLE; 477 } 478 479 /** 480 * Set QMF mode (might be overriden) 481 * 0:HQ (complex) 482 * 1:LP (partially complex) 483 */ 484 self->qmfModeUser = (QMF_MODE)value; 485 break; 486 487 488 case AAC_DRC_ATTENUATION_FACTOR: 489 /* DRC compression factor (where 0 is no and 127 is max compression) */ 490 errorStatus = 491 aacDecoder_drcSetParam ( 492 hDrcInfo, 493 DRC_CUT_SCALE, 494 value 495 ); 496 break; 497 498 case AAC_DRC_BOOST_FACTOR: 499 /* DRC boost factor (where 0 is no and 127 is max boost) */ 500 errorStatus = 501 aacDecoder_drcSetParam ( 502 hDrcInfo, 503 DRC_BOOST_SCALE, 504 value 505 ); 506 break; 507 508 case AAC_DRC_REFERENCE_LEVEL: 509 /* DRC reference level quantized in 0.25dB steps using values [0..127] it is '-' for analog scaling */ 510 errorStatus = 511 aacDecoder_drcSetParam ( 512 hDrcInfo, 513 TARGET_REF_LEVEL, 514 value 515 ); 516 break; 517 518 case AAC_DRC_HEAVY_COMPRESSION: 519 /* Don't need to overwrite cut/boost values */ 520 errorStatus = 521 aacDecoder_drcSetParam ( 522 hDrcInfo, 523 APPLY_HEAVY_COMPRESSION, 524 value 525 ); 526 break; 527 528 529 case AAC_TPDEC_CLEAR_BUFFER: 530 transportDec_SetParam(self->hInput, TPDEC_PARAM_RESET, 1); 531 self->streamInfo.numLostAccessUnits = 0; 532 self->streamInfo.numBadBytes = 0; 533 self->streamInfo.numTotalBytes = 0; 534 /* aacDecoder_SignalInterruption(self); */ 535 break; 536 537 case AAC_CONCEAL_METHOD: 538 /* Changing the concealment method can introduce additional bitstream delay. And 539 that in turn affects sub libraries and modules which makes the whole thing quite 540 complex. So the complete changing routine is packed into a helper function which 541 keeps all modules and libs in a consistent state even in the case an error occures. */ 542 errorStatus = setConcealMethod ( self, value ); 543 break; 544 545 default: 546 return AAC_DEC_SET_PARAM_FAIL; 547 } /* switch(param) */ 548 549 return (errorStatus); 550 } 551 552 553 LINKSPEC_CPP HANDLE_AACDECODER aacDecoder_Open(TRANSPORT_TYPE transportFmt, UINT nrOfLayers) 554 { 555 AAC_DECODER_INSTANCE *aacDec = NULL; 556 HANDLE_TRANSPORTDEC pIn; 557 int err = 0; 558 559 /* Allocate transport layer struct. */ 560 pIn = transportDec_Open(transportFmt, TP_FLAG_MPEG4); 561 if (pIn == NULL) { 562 return NULL; 563 } 564 565 transportDec_SetParam(pIn, TPDEC_PARAM_IGNORE_BUFFERFULLNESS, 1); 566 567 /* Allocate AAC decoder core struct. */ 568 aacDec = CAacDecoder_Open(transportFmt); 569 570 if (aacDec == NULL) { 571 transportDec_Close(&pIn); 572 goto bail; 573 } 574 aacDec->hInput = pIn; 575 576 aacDec->nrOfLayers = nrOfLayers; 577 578 aacDec->channelOutputMapping = channelMappingTableWAV; 579 580 /* Register Config Update callback. */ 581 transportDec_RegisterAscCallback(pIn, aacDecoder_ConfigCallback, (void*)aacDec); 582 583 /* open SBR decoder */ 584 if ( SBRDEC_OK != sbrDecoder_Open ( &aacDec->hSbrDecoder )) { 585 err = -1; 586 goto bail; 587 } 588 aacDec->qmfModeUser = NOT_DEFINED; 589 transportDec_RegisterSbrCallback(aacDec->hInput, (cbSbr_t)sbrDecoder_Header, (void*)aacDec->hSbrDecoder); 590 591 592 pcmDmx_Open( &aacDec->hPcmUtils ); 593 if (aacDec->hPcmUtils == NULL) { 594 err = -1; 595 goto bail; 596 } 597 598 599 600 /* Assure that all modules have same delay */ 601 if ( setConcealMethod(aacDec, CConcealment_GetMethod(&aacDec->concealCommonData)) ) { 602 err = -1; 603 goto bail; 604 } 605 606 bail: 607 if (err == -1) { 608 aacDecoder_Close(aacDec); 609 aacDec = NULL; 610 } 611 return aacDec; 612 } 613 614 LINKSPEC_CPP AAC_DECODER_ERROR aacDecoder_Fill( 615 HANDLE_AACDECODER self, 616 UCHAR *pBuffer[], 617 const UINT bufferSize[], 618 UINT *pBytesValid 619 ) 620 { 621 TRANSPORTDEC_ERROR tpErr; 622 /* loop counter for layers; if not TT_MP4_RAWPACKETS used as index for only 623 available layer */ 624 INT layer = 0; 625 INT nrOfLayers = self->nrOfLayers; 626 627 { 628 for (layer = 0; layer < nrOfLayers; layer++){ 629 { 630 tpErr = transportDec_FillData( self->hInput, pBuffer[layer], bufferSize[layer], &pBytesValid[layer], layer ); 631 if (tpErr != TRANSPORTDEC_OK) { 632 return AAC_DEC_UNKNOWN; /* Must be an internal error */ 633 } 634 } 635 } 636 } 637 638 return AAC_DEC_OK; 639 } 640 641 642 static void aacDecoder_SignalInterruption(HANDLE_AACDECODER self) 643 { 644 CAacDecoder_SignalInterruption(self); 645 646 if ( self->hSbrDecoder != NULL ) { 647 sbrDecoder_SetParam(self->hSbrDecoder, SBR_BS_INTERRUPTION, 0); 648 } 649 } 650 651 static void aacDecoder_UpdateBitStreamCounters(CStreamInfo *pSi, HANDLE_FDK_BITSTREAM hBs, int nBits, AAC_DECODER_ERROR ErrorStatus) 652 { 653 /* calculate bit difference (amount of bits moved forward) */ 654 nBits = nBits - FDKgetValidBits(hBs); 655 656 /* Note: The amount of bits consumed might become negative when parsing a 657 bit stream with several sub frames, and we find out at the last sub frame 658 that the total frame length does not match the sum of sub frame length. 659 If this happens, the transport decoder might want to rewind to the supposed 660 ending of the transport frame, and this position might be before the last 661 access unit beginning. */ 662 663 /* Calc bitrate. */ 664 if (pSi->frameSize > 0) { 665 pSi->bitRate = (nBits * pSi->sampleRate)/pSi->frameSize; 666 } 667 668 /* bit/byte counters */ 669 { 670 int nBytes; 671 672 nBytes = nBits>>3; 673 pSi->numTotalBytes += nBytes; 674 if (IS_OUTPUT_VALID(ErrorStatus)) { 675 pSi->numTotalAccessUnits++; 676 } 677 if (IS_DECODE_ERROR(ErrorStatus)) { 678 pSi->numBadBytes += nBytes; 679 pSi->numBadAccessUnits++; 680 } 681 } 682 } 683 684 static INT aacDecoder_EstimateNumberOfLostFrames(HANDLE_AACDECODER self) 685 { 686 INT n; 687 688 transportDec_GetMissingAccessUnitCount( &n, self->hInput); 689 690 return n; 691 } 692 693 LINKSPEC_CPP AAC_DECODER_ERROR aacDecoder_DecodeFrame( 694 HANDLE_AACDECODER self, 695 INT_PCM *pTimeData, 696 const INT timeDataSize, 697 const UINT flags) 698 { 699 AAC_DECODER_ERROR ErrorStatus; 700 INT layer; 701 INT nBits; 702 INT interleaved = self->outputInterleaved; 703 HANDLE_FDK_BITSTREAM hBs; 704 int fTpInterruption = 0; /* Transport originated interruption detection. */ 705 int fTpConceal = 0; /* Transport originated concealment. */ 706 707 708 if (self == NULL) { 709 return AAC_DEC_INVALID_HANDLE; 710 } 711 712 if (flags & AACDEC_INTR) { 713 self->streamInfo.numLostAccessUnits = 0; 714 } 715 716 hBs = transportDec_GetBitstream(self->hInput, 0); 717 718 /* Get current bits position for bitrate calculation. */ 719 nBits = FDKgetValidBits(hBs); 720 if (! (flags & (AACDEC_CONCEAL | AACDEC_FLUSH) ) ) 721 { 722 TRANSPORTDEC_ERROR err; 723 724 for(layer = 0; layer < self->nrOfLayers; layer++) 725 { 726 err = transportDec_ReadAccessUnit(self->hInput, layer); 727 if (err != TRANSPORTDEC_OK) { 728 switch (err) { 729 case TRANSPORTDEC_NOT_ENOUGH_BITS: 730 ErrorStatus = AAC_DEC_NOT_ENOUGH_BITS; 731 goto bail; 732 case TRANSPORTDEC_SYNC_ERROR: 733 self->streamInfo.numLostAccessUnits = aacDecoder_EstimateNumberOfLostFrames(self); 734 fTpInterruption = 1; 735 break; 736 case TRANSPORTDEC_NEED_TO_RESTART: 737 ErrorStatus = AAC_DEC_NEED_TO_RESTART; 738 goto bail; 739 case TRANSPORTDEC_CRC_ERROR: 740 fTpConceal = 1; 741 break; 742 default: 743 ErrorStatus = AAC_DEC_UNKNOWN; 744 goto bail; 745 } 746 } 747 } 748 } else { 749 if (self->streamInfo.numLostAccessUnits > 0) { 750 self->streamInfo.numLostAccessUnits--; 751 } 752 } 753 754 /* Signal bit stream interruption to other modules if required. */ 755 if ( fTpInterruption || (flags & (AACDEC_INTR|AACDEC_CLRHIST)) ) 756 { 757 aacDecoder_SignalInterruption(self); 758 if ( ! (flags & AACDEC_INTR) ) { 759 ErrorStatus = AAC_DEC_TRANSPORT_SYNC_ERROR; 760 goto bail; 761 } 762 } 763 764 /* Empty bit buffer in case of flush request. */ 765 if (flags & AACDEC_FLUSH) 766 { 767 transportDec_SetParam(self->hInput, TPDEC_PARAM_RESET, 1); 768 self->streamInfo.numLostAccessUnits = 0; 769 self->streamInfo.numBadBytes = 0; 770 self->streamInfo.numTotalBytes = 0; 771 } 772 773 774 ErrorStatus = CAacDecoder_DecodeFrame(self, 775 flags | (fTpConceal ? AACDEC_CONCEAL : 0), 776 pTimeData, 777 timeDataSize, 778 interleaved); 779 780 if (!(flags & (AACDEC_CONCEAL|AACDEC_FLUSH))) { 781 TRANSPORTDEC_ERROR tpErr; 782 tpErr = transportDec_EndAccessUnit(self->hInput); 783 if (tpErr != TRANSPORTDEC_OK) { 784 self->frameOK = 0; 785 } 786 } 787 788 /* If the current pTimeData does not contain a valid signal, there nothing else we can do, so bail. */ 789 if ( ! IS_OUTPUT_VALID(ErrorStatus) ) { 790 goto bail; 791 } 792 793 { 794 /* Export data into streaminfo structure */ 795 self->streamInfo.sampleRate = self->streamInfo.aacSampleRate; 796 self->streamInfo.frameSize = self->streamInfo.aacSamplesPerFrame; 797 self->streamInfo.numChannels = self->aacChannels; 798 } 799 800 801 802 CAacDecoder_SyncQmfMode(self); 803 804 /* sbr decoder */ 805 806 if (ErrorStatus || (flags & AACDEC_CONCEAL) || self->pAacDecoderStaticChannelInfo[0]->concealmentInfo.concealState > ConcealState_FadeIn) 807 { 808 self->frameOK = 0; /* if an error has occured do concealment in the SBR decoder too */ 809 } 810 811 if (self->sbrEnabled) 812 { 813 SBR_ERROR sbrError = SBRDEC_OK; 814 815 /* set params */ 816 sbrDecoder_SetParam ( self->hSbrDecoder, 817 SBR_SYSTEM_BITSTREAM_DELAY, 818 self->sbrParams.bsDelay); 819 820 if ( self->streamInfo.aot == AOT_ER_AAC_ELD ) { 821 /* Configure QMF */ 822 sbrDecoder_SetParam ( self->hSbrDecoder, 823 SBR_LD_QMF_TIME_ALIGN, 824 (self->flags & AC_LD_MPS) ? 1 : 0 ); 825 } 826 827 828 829 830 /* apply SBR processing */ 831 sbrError = sbrDecoder_Apply ( self->hSbrDecoder, 832 pTimeData, 833 &self->streamInfo.numChannels, 834 &self->streamInfo.sampleRate, 835 self->channelOutputMapping[self->aacChannels-1], 836 interleaved, 837 self->frameOK, 838 &self->psPossible); 839 840 841 if (sbrError == SBRDEC_OK) { 842 843 /* Update data in streaminfo structure. Assume that the SBR upsampling factor is either 1 or 2 */ 844 self->flags |= AC_SBR_PRESENT; 845 if (self->streamInfo.aacSampleRate != self->streamInfo.sampleRate) { 846 if (self->streamInfo.frameSize == 768) { 847 self->streamInfo.frameSize = (self->streamInfo.aacSamplesPerFrame * 8) / 3; 848 } else { 849 self->streamInfo.frameSize = self->streamInfo.aacSamplesPerFrame << 1; 850 } 851 } 852 853 if (self->psPossible) { 854 self->flags |= AC_PS_PRESENT; 855 self->channelType[0] = ACT_FRONT; 856 self->channelType[1] = ACT_FRONT; 857 self->channelIndices[0] = 0; 858 self->channelIndices[1] = 1; 859 } else { 860 self->flags &= ~AC_PS_PRESENT; 861 } 862 } 863 } 864 865 866 if ( flags & (AACDEC_INTR | AACDEC_CLRHIST) ) { 867 /* delete data from the past (e.g. mixdown coeficients) */ 868 pcmDmx_Reset( self->hPcmUtils, PCMDMX_RESET_BS_DATA ); 869 } 870 /* do PCM post processing */ 871 pcmDmx_ApplyFrame ( 872 self->hPcmUtils, 873 pTimeData, 874 self->streamInfo.frameSize, 875 &self->streamInfo.numChannels, 876 interleaved, 877 self->channelType, 878 self->channelIndices, 879 self->channelOutputMapping 880 ); 881 882 883 884 /* Signal interruption to take effect in next frame. */ 885 if ( flags & AACDEC_FLUSH ) { 886 aacDecoder_SignalInterruption(self); 887 } 888 889 /* Update externally visible copy of flags */ 890 self->streamInfo.flags = self->flags; 891 892 bail: 893 894 /* Update Statistics */ 895 aacDecoder_UpdateBitStreamCounters(&self->streamInfo, hBs, nBits, ErrorStatus); 896 897 return ErrorStatus; 898 } 899 900 LINKSPEC_CPP void aacDecoder_Close ( HANDLE_AACDECODER self ) 901 { 902 if (self == NULL) 903 return; 904 905 906 907 if (self->hPcmUtils != NULL) { 908 pcmDmx_Close( &self->hPcmUtils ); 909 } 910 911 912 913 if (self->hSbrDecoder != NULL) { 914 sbrDecoder_Close(&self->hSbrDecoder); 915 } 916 917 if (self->hInput != NULL) { 918 transportDec_Close(&self->hInput); 919 } 920 921 CAacDecoder_Close(self); 922 } 923 924 925 LINKSPEC_CPP CStreamInfo* aacDecoder_GetStreamInfo ( HANDLE_AACDECODER self ) 926 { 927 return CAacDecoder_GetStreamInfo(self); 928 } 929 930 LINKSPEC_CPP INT aacDecoder_GetLibInfo ( LIB_INFO *info ) 931 { 932 int i; 933 934 if (info == NULL) { 935 return -1; 936 } 937 938 sbrDecoder_GetLibInfo( info ); 939 transportDec_GetLibInfo( info ); 940 FDK_toolsGetLibInfo( info ); 941 pcmDmx_GetLibInfo( info ); 942 943 /* search for next free tab */ 944 for (i = 0; i < FDK_MODULE_LAST; i++) { 945 if (info[i].module_id == FDK_NONE) break; 946 } 947 if (i == FDK_MODULE_LAST) { 948 return -1; 949 } 950 info += i; 951 952 info->module_id = FDK_AACDEC; 953 /* build own library info */ 954 info->version = LIB_VERSION(AACDECODER_LIB_VL0, AACDECODER_LIB_VL1, AACDECODER_LIB_VL2); 955 LIB_VERSION_STRING(info); 956 info->build_date = AACDECODER_LIB_BUILD_DATE; 957 info->build_time = AACDECODER_LIB_BUILD_TIME; 958 info->title = AACDECODER_LIB_TITLE; 959 960 /* Set flags */ 961 info->flags = 0 962 | CAPF_AAC_LC 963 | CAPF_AAC_VCB11 964 | CAPF_AAC_HCR 965 | CAPF_AAC_RVLC 966 | CAPF_ER_AAC_LD 967 | CAPF_ER_AAC_ELD 968 | CAPF_AAC_CONCEALMENT 969 | CAPF_AAC_DRC 970 971 | CAPF_AAC_MPEG4 972 973 974 | CAPF_AAC_1024 975 | CAPF_AAC_960 976 977 | CAPF_AAC_512 978 979 | CAPF_AAC_480 980 981 ; 982 /* End of flags */ 983 984 return 0; 985 } 986 987 988 989 990
