1 2 /* ----------------------------------------------------------------------------------------------------------- 3 Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5 Copyright 1995 - 2015 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 5 113 #define AACDECODER_LIB_VL2 17 114 #define AACDECODER_LIB_TITLE "AAC Decoder Lib" 115 #ifdef __ANDROID__ 116 #define AACDECODER_LIB_BUILD_DATE "" 117 #define AACDECODER_LIB_BUILD_TIME "" 118 #else 119 #define AACDECODER_LIB_BUILD_DATE __DATE__ 120 #define AACDECODER_LIB_BUILD_TIME __TIME__ 121 #endif 122 123 static AAC_DECODER_ERROR 124 setConcealMethod ( const HANDLE_AACDECODER self, 125 const INT method ); 126 127 128 LINKSPEC_CPP AAC_DECODER_ERROR aacDecoder_GetFreeBytes ( const HANDLE_AACDECODER self, UINT *pFreeBytes){ 129 130 /* reset free bytes */ 131 *pFreeBytes = 0; 132 133 /* check handle */ 134 if(!self) 135 return AAC_DEC_INVALID_HANDLE; 136 137 /* return nr of free bytes */ 138 HANDLE_FDK_BITSTREAM hBs = transportDec_GetBitstream(self->hInput, 0); 139 *pFreeBytes = FDKgetFreeBits(hBs) >> 3; 140 141 /* success */ 142 return AAC_DEC_OK; 143 } 144 145 /** 146 * Config Decoder using a CSAudioSpecificConfig struct. 147 */ 148 static 149 LINKSPEC_CPP AAC_DECODER_ERROR aacDecoder_Config(HANDLE_AACDECODER self, const CSAudioSpecificConfig *pAscStruct) 150 { 151 AAC_DECODER_ERROR err; 152 153 /* Initialize AAC core decoder, and update self->streaminfo */ 154 err = CAacDecoder_Init(self, pAscStruct); 155 156 return err; 157 } 158 159 LINKSPEC_CPP AAC_DECODER_ERROR aacDecoder_ConfigRaw ( 160 HANDLE_AACDECODER self, 161 UCHAR *conf[], 162 const UINT length[] ) 163 { 164 AAC_DECODER_ERROR err = AAC_DEC_OK; 165 TRANSPORTDEC_ERROR errTp; 166 UINT layer, nrOfLayers = self->nrOfLayers; 167 168 for(layer = 0; layer < nrOfLayers; layer++){ 169 if(length[layer] > 0){ 170 errTp = transportDec_OutOfBandConfig(self->hInput, conf[layer], length[layer], layer); 171 if (errTp != TRANSPORTDEC_OK) { 172 switch (errTp) { 173 case TRANSPORTDEC_NEED_TO_RESTART: 174 err = AAC_DEC_NEED_TO_RESTART; 175 break; 176 case TRANSPORTDEC_UNSUPPORTED_FORMAT: 177 err = AAC_DEC_UNSUPPORTED_FORMAT; 178 break; 179 default: 180 err = AAC_DEC_UNKNOWN; 181 break; 182 } 183 /* if baselayer is OK we continue decoding */ 184 if(layer >= 1){ 185 self->nrOfLayers = layer; 186 err = AAC_DEC_OK; 187 } 188 break; 189 } 190 } 191 } 192 193 return err; 194 } 195 196 197 198 static INT aacDecoder_ConfigCallback(void *handle, const CSAudioSpecificConfig *pAscStruct) 199 { 200 HANDLE_AACDECODER self = (HANDLE_AACDECODER)handle; 201 AAC_DECODER_ERROR err = AAC_DEC_OK; 202 TRANSPORTDEC_ERROR errTp; 203 204 { 205 { 206 err = aacDecoder_Config(self, pAscStruct); 207 } 208 } 209 if (err == AAC_DEC_OK) { 210 if ( self->flags & (AC_USAC|AC_RSVD50|AC_LD|AC_ELD) 211 && CConcealment_GetDelay(&self->concealCommonData) > 0 ) 212 { 213 /* Revert to error concealment method Noise Substitution. 214 Because interpolation is not implemented for USAC/RSVD50 or 215 the additional delay is unwanted for low delay codecs. */ 216 setConcealMethod(self, 1); 217 #ifdef DEBUG 218 FDKprintf(" Concealment method was reverted to 1 !\n"); 219 #endif 220 } 221 errTp = TRANSPORTDEC_OK; 222 } else { 223 if (IS_INIT_ERROR(err)) { 224 errTp = TRANSPORTDEC_UNSUPPORTED_FORMAT; 225 } /* Fatal errors */ 226 else if (err == AAC_DEC_NEED_TO_RESTART) { 227 errTp = TRANSPORTDEC_NEED_TO_RESTART; 228 } else { 229 errTp = TRANSPORTDEC_UNKOWN_ERROR; 230 } 231 } 232 233 return errTp; 234 } 235 236 237 238 LINKSPEC_CPP AAC_DECODER_ERROR 239 aacDecoder_AncDataInit ( HANDLE_AACDECODER self, 240 UCHAR *buffer, 241 int size ) 242 { 243 CAncData *ancData = &self->ancData; 244 245 return CAacDecoder_AncDataInit(ancData, buffer, size); 246 } 247 248 249 LINKSPEC_CPP AAC_DECODER_ERROR 250 aacDecoder_AncDataGet ( HANDLE_AACDECODER self, 251 int index, 252 UCHAR **ptr, 253 int *size ) 254 { 255 CAncData *ancData = &self->ancData; 256 257 return CAacDecoder_AncDataGet(ancData, index, ptr, size); 258 } 259 260 261 static AAC_DECODER_ERROR 262 setConcealMethod ( const HANDLE_AACDECODER self, /*!< Handle of the decoder instance */ 263 const INT method ) 264 { 265 AAC_DECODER_ERROR errorStatus = AAC_DEC_OK; 266 CConcealParams *pConcealData = NULL; 267 HANDLE_SBRDECODER hSbrDec = NULL; 268 HANDLE_AAC_DRC hDrcInfo = NULL; 269 HANDLE_PCM_DOWNMIX hPcmDmx = NULL; 270 CConcealmentMethod backupMethod = ConcealMethodNone; 271 int backupDelay = 0; 272 int bsDelay = 0; 273 274 /* check decoder handle */ 275 if (self != NULL) { 276 pConcealData = &self->concealCommonData; 277 hSbrDec = self->hSbrDecoder; 278 hDrcInfo = self->hDrcInfo; 279 hPcmDmx = self->hPcmUtils; 280 } 281 282 283 /* Get current method/delay */ 284 backupMethod = CConcealment_GetMethod(pConcealData); 285 backupDelay = CConcealment_GetDelay(pConcealData); 286 287 /* Be sure to set AAC and SBR concealment method simultaneously! */ 288 errorStatus = 289 CConcealment_SetParams( 290 pConcealData, 291 (int)method, // concealMethod 292 AACDEC_CONCEAL_PARAM_NOT_SPECIFIED, // concealFadeOutSlope 293 AACDEC_CONCEAL_PARAM_NOT_SPECIFIED, // concealFadeInSlope 294 AACDEC_CONCEAL_PARAM_NOT_SPECIFIED, // concealMuteRelease 295 AACDEC_CONCEAL_PARAM_NOT_SPECIFIED // concealComfNoiseLevel 296 ); 297 if ( (errorStatus != AAC_DEC_OK) 298 && (errorStatus != AAC_DEC_INVALID_HANDLE) ) { 299 goto bail; 300 } 301 302 /* Get new delay */ 303 bsDelay = CConcealment_GetDelay(pConcealData); 304 305 { 306 SBR_ERROR sbrErr = SBRDEC_OK; 307 308 /* set SBR bitstream delay */ 309 sbrErr = sbrDecoder_SetParam ( 310 hSbrDec, 311 SBR_SYSTEM_BITSTREAM_DELAY, 312 bsDelay 313 ); 314 315 switch (sbrErr) { 316 case SBRDEC_OK: 317 case SBRDEC_NOT_INITIALIZED: 318 if (self != NULL) { 319 /* save the param value and set later 320 (when SBR has been initialized) */ 321 self->sbrParams.bsDelay = bsDelay; 322 } 323 break; 324 default: 325 errorStatus = AAC_DEC_SET_PARAM_FAIL; 326 goto bail; 327 } 328 } 329 330 errorStatus = 331 aacDecoder_drcSetParam ( 332 hDrcInfo, 333 DRC_BS_DELAY, 334 bsDelay 335 ); 336 if ( (errorStatus != AAC_DEC_OK) 337 && (errorStatus != AAC_DEC_INVALID_HANDLE) ) { 338 goto bail; 339 } 340 341 if (errorStatus == AAC_DEC_OK) { 342 PCMDMX_ERROR err = 343 pcmDmx_SetParam ( 344 hPcmDmx, 345 DMX_BS_DATA_DELAY, 346 bsDelay 347 ); 348 switch (err) { 349 case PCMDMX_INVALID_HANDLE: 350 errorStatus = AAC_DEC_INVALID_HANDLE; 351 case PCMDMX_OK: 352 break; 353 default: 354 errorStatus = AAC_DEC_SET_PARAM_FAIL; 355 goto bail; 356 } 357 } 358 359 360 bail: 361 if ( (errorStatus != AAC_DEC_OK) 362 && (errorStatus != AAC_DEC_INVALID_HANDLE) ) 363 { 364 /* Revert to the initial state */ 365 CConcealment_SetParams ( 366 pConcealData, 367 (int)backupMethod, 368 AACDEC_CONCEAL_PARAM_NOT_SPECIFIED, 369 AACDEC_CONCEAL_PARAM_NOT_SPECIFIED, 370 AACDEC_CONCEAL_PARAM_NOT_SPECIFIED, 371 AACDEC_CONCEAL_PARAM_NOT_SPECIFIED 372 ); 373 /* Revert SBR bitstream delay */ 374 sbrDecoder_SetParam ( 375 hSbrDec, 376 SBR_SYSTEM_BITSTREAM_DELAY, 377 backupDelay 378 ); 379 /* Revert DRC bitstream delay */ 380 aacDecoder_drcSetParam ( 381 hDrcInfo, 382 DRC_BS_DELAY, 383 backupDelay 384 ); 385 /* Revert PCM mixdown bitstream delay */ 386 pcmDmx_SetParam ( 387 hPcmDmx, 388 DMX_BS_DATA_DELAY, 389 backupDelay 390 ); 391 } 392 393 return errorStatus; 394 } 395 396 397 LINKSPEC_CPP AAC_DECODER_ERROR 398 aacDecoder_SetParam ( const HANDLE_AACDECODER self, /*!< Handle of the decoder instance */ 399 const AACDEC_PARAM param, /*!< Parameter to set */ 400 const INT value) /*!< Parameter valued */ 401 { 402 AAC_DECODER_ERROR errorStatus = AAC_DEC_OK; 403 CConcealParams *pConcealData = NULL; 404 HANDLE_AAC_DRC hDrcInfo = NULL; 405 HANDLE_PCM_DOWNMIX hPcmDmx = NULL; 406 TDLimiterPtr hPcmTdl = NULL; 407 408 /* check decoder handle */ 409 if (self != NULL) { 410 pConcealData = &self->concealCommonData; 411 hDrcInfo = self->hDrcInfo; 412 hPcmDmx = self->hPcmUtils; 413 hPcmTdl = self->hLimiter; 414 } else { 415 errorStatus = AAC_DEC_INVALID_HANDLE; 416 } 417 418 /* configure the subsystems */ 419 switch (param) 420 { 421 case AAC_PCM_OUTPUT_INTERLEAVED: 422 if (value < 0 || value > 1) { 423 return AAC_DEC_SET_PARAM_FAIL; 424 } 425 if (self == NULL) { 426 return AAC_DEC_INVALID_HANDLE; 427 } 428 self->outputInterleaved = value; 429 break; 430 431 case AAC_PCM_MIN_OUTPUT_CHANNELS: 432 if (value < -1 || value > (8)) { 433 return AAC_DEC_SET_PARAM_FAIL; 434 } 435 { 436 PCMDMX_ERROR err; 437 438 err = pcmDmx_SetParam ( 439 hPcmDmx, 440 MIN_NUMBER_OF_OUTPUT_CHANNELS, 441 value ); 442 443 switch (err) { 444 case PCMDMX_OK: 445 break; 446 case PCMDMX_INVALID_HANDLE: 447 return AAC_DEC_INVALID_HANDLE; 448 default: 449 return AAC_DEC_SET_PARAM_FAIL; 450 } 451 } 452 break; 453 454 case AAC_PCM_MAX_OUTPUT_CHANNELS: 455 if (value < -1 || value > (8)) { 456 return AAC_DEC_SET_PARAM_FAIL; 457 } 458 { 459 PCMDMX_ERROR err; 460 461 err = pcmDmx_SetParam ( 462 hPcmDmx, 463 MAX_NUMBER_OF_OUTPUT_CHANNELS, 464 value ); 465 466 switch (err) { 467 case PCMDMX_OK: 468 break; 469 case PCMDMX_INVALID_HANDLE: 470 return AAC_DEC_INVALID_HANDLE; 471 default: 472 return AAC_DEC_SET_PARAM_FAIL; 473 } 474 } 475 break; 476 477 case AAC_PCM_DUAL_CHANNEL_OUTPUT_MODE: 478 { 479 PCMDMX_ERROR err; 480 481 err = pcmDmx_SetParam ( 482 hPcmDmx, 483 DMX_DUAL_CHANNEL_MODE, 484 value ); 485 486 switch (err) { 487 case PCMDMX_OK: 488 break; 489 case PCMDMX_INVALID_HANDLE: 490 return AAC_DEC_INVALID_HANDLE; 491 default: 492 return AAC_DEC_SET_PARAM_FAIL; 493 } 494 } 495 break; 496 497 498 case AAC_PCM_LIMITER_ENABLE: 499 if (value < -1 || value > 1) { 500 return AAC_DEC_SET_PARAM_FAIL; 501 } 502 if (self == NULL) { 503 return AAC_DEC_INVALID_HANDLE; 504 } 505 self->limiterEnableUser = value; 506 break; 507 508 case AAC_PCM_LIMITER_ATTACK_TIME: 509 if (value <= 0) { /* module function converts value to unsigned */ 510 return AAC_DEC_SET_PARAM_FAIL; 511 } 512 switch (setLimiterAttack(hPcmTdl, value)) { 513 case TDLIMIT_OK: 514 break; 515 case TDLIMIT_INVALID_HANDLE: 516 return AAC_DEC_INVALID_HANDLE; 517 case TDLIMIT_INVALID_PARAMETER: 518 default: 519 return AAC_DEC_SET_PARAM_FAIL; 520 } 521 break; 522 523 case AAC_PCM_LIMITER_RELEAS_TIME: 524 if (value <= 0) { /* module function converts value to unsigned */ 525 return AAC_DEC_SET_PARAM_FAIL; 526 } 527 switch (setLimiterRelease(hPcmTdl, value)) { 528 case TDLIMIT_OK: 529 break; 530 case TDLIMIT_INVALID_HANDLE: 531 return AAC_DEC_INVALID_HANDLE; 532 case TDLIMIT_INVALID_PARAMETER: 533 default: 534 return AAC_DEC_SET_PARAM_FAIL; 535 } 536 break; 537 538 case AAC_PCM_OUTPUT_CHANNEL_MAPPING: 539 switch (value) { 540 case 0: 541 if (self != NULL) { 542 self->channelOutputMapping = channelMappingTablePassthrough; 543 } 544 break; 545 case 1: 546 if (self != NULL) { 547 self->channelOutputMapping = channelMappingTableWAV; 548 } 549 break; 550 default: 551 errorStatus = AAC_DEC_SET_PARAM_FAIL; 552 break; 553 } 554 break; 555 556 557 case AAC_QMF_LOWPOWER: 558 if (value < -1 || value > 1) { 559 return AAC_DEC_SET_PARAM_FAIL; 560 } 561 if (self == NULL) { 562 return AAC_DEC_INVALID_HANDLE; 563 } 564 565 /** 566 * Set QMF mode (might be overriden) 567 * 0:HQ (complex) 568 * 1:LP (partially complex) 569 */ 570 self->qmfModeUser = (QMF_MODE)value; 571 break; 572 573 574 case AAC_DRC_ATTENUATION_FACTOR: 575 /* DRC compression factor (where 0 is no and 127 is max compression) */ 576 errorStatus = 577 aacDecoder_drcSetParam ( 578 hDrcInfo, 579 DRC_CUT_SCALE, 580 value 581 ); 582 break; 583 584 case AAC_DRC_BOOST_FACTOR: 585 /* DRC boost factor (where 0 is no and 127 is max boost) */ 586 errorStatus = 587 aacDecoder_drcSetParam ( 588 hDrcInfo, 589 DRC_BOOST_SCALE, 590 value 591 ); 592 break; 593 594 case AAC_DRC_REFERENCE_LEVEL: 595 /* DRC reference level quantized in 0.25dB steps using values [0..127] it is '-' for analog scaling */ 596 errorStatus = 597 aacDecoder_drcSetParam ( 598 hDrcInfo, 599 TARGET_REF_LEVEL, 600 value 601 ); 602 break; 603 604 case AAC_DRC_HEAVY_COMPRESSION: 605 /* Don't need to overwrite cut/boost values */ 606 errorStatus = 607 aacDecoder_drcSetParam ( 608 hDrcInfo, 609 APPLY_HEAVY_COMPRESSION, 610 value 611 ); 612 break; 613 614 615 case AAC_TPDEC_CLEAR_BUFFER: 616 transportDec_SetParam(self->hInput, TPDEC_PARAM_RESET, 1); 617 self->streamInfo.numLostAccessUnits = 0; 618 self->streamInfo.numBadBytes = 0; 619 self->streamInfo.numTotalBytes = 0; 620 /* aacDecoder_SignalInterruption(self); */ 621 break; 622 623 case AAC_CONCEAL_METHOD: 624 /* Changing the concealment method can introduce additional bitstream delay. And 625 that in turn affects sub libraries and modules which makes the whole thing quite 626 complex. So the complete changing routine is packed into a helper function which 627 keeps all modules and libs in a consistent state even in the case an error occures. */ 628 errorStatus = setConcealMethod ( self, value ); 629 break; 630 631 default: 632 return AAC_DEC_SET_PARAM_FAIL; 633 } /* switch(param) */ 634 635 return (errorStatus); 636 } 637 638 639 LINKSPEC_CPP HANDLE_AACDECODER aacDecoder_Open(TRANSPORT_TYPE transportFmt, UINT nrOfLayers) 640 { 641 AAC_DECODER_INSTANCE *aacDec = NULL; 642 HANDLE_TRANSPORTDEC pIn; 643 int err = 0; 644 645 /* Allocate transport layer struct. */ 646 pIn = transportDec_Open(transportFmt, TP_FLAG_MPEG4); 647 if (pIn == NULL) { 648 return NULL; 649 } 650 651 transportDec_SetParam(pIn, TPDEC_PARAM_IGNORE_BUFFERFULLNESS, 1); 652 653 /* Allocate AAC decoder core struct. */ 654 aacDec = CAacDecoder_Open(transportFmt); 655 656 if (aacDec == NULL) { 657 transportDec_Close(&pIn); 658 goto bail; 659 } 660 aacDec->hInput = pIn; 661 662 aacDec->nrOfLayers = nrOfLayers; 663 664 aacDec->channelOutputMapping = channelMappingTableWAV; 665 666 /* Register Config Update callback. */ 667 transportDec_RegisterAscCallback(pIn, aacDecoder_ConfigCallback, (void*)aacDec); 668 669 /* open SBR decoder */ 670 if ( SBRDEC_OK != sbrDecoder_Open ( &aacDec->hSbrDecoder )) { 671 err = -1; 672 goto bail; 673 } 674 aacDec->qmfModeUser = NOT_DEFINED; 675 transportDec_RegisterSbrCallback(aacDec->hInput, (cbSbr_t)sbrDecoder_Header, (void*)aacDec->hSbrDecoder); 676 677 678 pcmDmx_Open( &aacDec->hPcmUtils ); 679 if (aacDec->hPcmUtils == NULL) { 680 err = -1; 681 goto bail; 682 } 683 684 aacDec->hLimiter = createLimiter(TDL_ATTACK_DEFAULT_MS, TDL_RELEASE_DEFAULT_MS, SAMPLE_MAX, (8), 96000); 685 if (NULL == aacDec->hLimiter) { 686 err = -1; 687 goto bail; 688 } 689 aacDec->limiterEnableUser = (UCHAR)-1; 690 aacDec->limiterEnableCurr = 0; 691 692 693 694 /* Assure that all modules have same delay */ 695 if ( setConcealMethod(aacDec, CConcealment_GetMethod(&aacDec->concealCommonData)) ) { 696 err = -1; 697 goto bail; 698 } 699 700 bail: 701 if (err == -1) { 702 aacDecoder_Close(aacDec); 703 aacDec = NULL; 704 } 705 return aacDec; 706 } 707 708 LINKSPEC_CPP AAC_DECODER_ERROR aacDecoder_Fill( 709 HANDLE_AACDECODER self, 710 UCHAR *pBuffer[], 711 const UINT bufferSize[], 712 UINT *pBytesValid 713 ) 714 { 715 TRANSPORTDEC_ERROR tpErr; 716 /* loop counter for layers; if not TT_MP4_RAWPACKETS used as index for only 717 available layer */ 718 INT layer = 0; 719 INT nrOfLayers = self->nrOfLayers; 720 721 { 722 for (layer = 0; layer < nrOfLayers; layer++){ 723 { 724 tpErr = transportDec_FillData( self->hInput, pBuffer[layer], bufferSize[layer], &pBytesValid[layer], layer ); 725 if (tpErr != TRANSPORTDEC_OK) { 726 return AAC_DEC_UNKNOWN; /* Must be an internal error */ 727 } 728 } 729 } 730 } 731 732 return AAC_DEC_OK; 733 } 734 735 736 static void aacDecoder_SignalInterruption(HANDLE_AACDECODER self) 737 { 738 CAacDecoder_SignalInterruption(self); 739 740 if ( self->hSbrDecoder != NULL ) { 741 sbrDecoder_SetParam(self->hSbrDecoder, SBR_BS_INTERRUPTION, 0); 742 } 743 } 744 745 static void aacDecoder_UpdateBitStreamCounters(CStreamInfo *pSi, HANDLE_FDK_BITSTREAM hBs, int nBits, AAC_DECODER_ERROR ErrorStatus) 746 { 747 /* calculate bit difference (amount of bits moved forward) */ 748 nBits = nBits - FDKgetValidBits(hBs); 749 750 /* Note: The amount of bits consumed might become negative when parsing a 751 bit stream with several sub frames, and we find out at the last sub frame 752 that the total frame length does not match the sum of sub frame length. 753 If this happens, the transport decoder might want to rewind to the supposed 754 ending of the transport frame, and this position might be before the last 755 access unit beginning. */ 756 757 /* Calc bitrate. */ 758 if (pSi->frameSize > 0) { 759 pSi->bitRate = (nBits * pSi->sampleRate)/pSi->frameSize; 760 } 761 762 /* bit/byte counters */ 763 { 764 int nBytes; 765 766 nBytes = nBits>>3; 767 pSi->numTotalBytes += nBytes; 768 if (IS_OUTPUT_VALID(ErrorStatus)) { 769 pSi->numTotalAccessUnits++; 770 } 771 if (IS_DECODE_ERROR(ErrorStatus)) { 772 pSi->numBadBytes += nBytes; 773 pSi->numBadAccessUnits++; 774 } 775 } 776 } 777 778 static INT aacDecoder_EstimateNumberOfLostFrames(HANDLE_AACDECODER self) 779 { 780 INT n; 781 782 transportDec_GetMissingAccessUnitCount( &n, self->hInput); 783 784 return n; 785 } 786 787 LINKSPEC_CPP AAC_DECODER_ERROR aacDecoder_DecodeFrame( 788 HANDLE_AACDECODER self, 789 INT_PCM *pTimeData_extern, 790 const INT timeDataSize_extern, 791 const UINT flags) 792 { 793 AAC_DECODER_ERROR ErrorStatus; 794 int fTpInterruption = 0; /* Transport originated interruption detection. */ 795 int fTpConceal = 0; /* Transport originated concealment. */ 796 797 if (self == NULL) { 798 return AAC_DEC_INVALID_HANDLE; 799 } 800 INT interleaved = self->outputInterleaved; 801 INT_PCM *pTimeData = self->pcmOutputBuffer; 802 INT timeDataSize = sizeof(self->pcmOutputBuffer)/sizeof(*self->pcmOutputBuffer); 803 804 if (flags & AACDEC_INTR) { 805 self->streamInfo.numLostAccessUnits = 0; 806 } 807 808 HANDLE_FDK_BITSTREAM hBs = transportDec_GetBitstream(self->hInput, 0); 809 810 /* Get current bits position for bitrate calculation. */ 811 INT nBits = FDKgetValidBits(hBs); 812 if (! (flags & (AACDEC_CONCEAL | AACDEC_FLUSH) ) ) 813 { 814 TRANSPORTDEC_ERROR err; 815 816 for(INT layer = 0; layer < self->nrOfLayers; layer++) 817 { 818 err = transportDec_ReadAccessUnit(self->hInput, layer); 819 if (err != TRANSPORTDEC_OK) { 820 switch (err) { 821 case TRANSPORTDEC_NOT_ENOUGH_BITS: 822 ErrorStatus = AAC_DEC_NOT_ENOUGH_BITS; 823 goto bail; 824 case TRANSPORTDEC_SYNC_ERROR: 825 self->streamInfo.numLostAccessUnits = aacDecoder_EstimateNumberOfLostFrames(self); 826 fTpInterruption = 1; 827 break; 828 case TRANSPORTDEC_NEED_TO_RESTART: 829 ErrorStatus = AAC_DEC_NEED_TO_RESTART; 830 goto bail; 831 case TRANSPORTDEC_CRC_ERROR: 832 fTpConceal = 1; 833 break; 834 default: 835 ErrorStatus = AAC_DEC_UNKNOWN; 836 goto bail; 837 } 838 } 839 } 840 } else { 841 if (self->streamInfo.numLostAccessUnits > 0) { 842 self->streamInfo.numLostAccessUnits--; 843 } 844 } 845 846 /* Signal bit stream interruption to other modules if required. */ 847 if ( fTpInterruption || (flags & (AACDEC_INTR|AACDEC_CLRHIST)) ) 848 { 849 sbrDecoder_SetParam(self->hSbrDecoder, SBR_CLEAR_HISTORY, (flags&AACDEC_CLRHIST)); 850 aacDecoder_SignalInterruption(self); 851 if ( ! (flags & AACDEC_INTR) ) { 852 ErrorStatus = AAC_DEC_TRANSPORT_SYNC_ERROR; 853 goto bail; 854 } 855 } 856 857 /* Empty bit buffer in case of flush request. */ 858 if (flags & AACDEC_FLUSH) 859 { 860 transportDec_SetParam(self->hInput, TPDEC_PARAM_RESET, 1); 861 self->streamInfo.numLostAccessUnits = 0; 862 self->streamInfo.numBadBytes = 0; 863 self->streamInfo.numTotalBytes = 0; 864 } 865 /* Reset the output delay field. The modules will add their figures one after another. */ 866 self->streamInfo.outputDelay = 0; 867 868 if (self->limiterEnableUser==(UCHAR)-1) { 869 /* Enbale limiter for all non-lowdelay AOT's. */ 870 self->limiterEnableCurr = ( self->flags & (AC_LD|AC_ELD) ) ? 0 : 1; 871 } 872 else { 873 /* Use limiter configuration as requested. */ 874 self->limiterEnableCurr = self->limiterEnableUser; 875 } 876 /* reset limiter gain on a per frame basis */ 877 self->extGain[0] = FL2FXCONST_DBL(1.0f/(float)(1<<TDL_GAIN_SCALING)); 878 879 880 ErrorStatus = CAacDecoder_DecodeFrame(self, 881 flags | (fTpConceal ? AACDEC_CONCEAL : 0), 882 pTimeData, 883 timeDataSize, 884 interleaved); 885 886 if (!(flags & (AACDEC_CONCEAL|AACDEC_FLUSH))) { 887 TRANSPORTDEC_ERROR tpErr; 888 tpErr = transportDec_EndAccessUnit(self->hInput); 889 if (tpErr != TRANSPORTDEC_OK) { 890 self->frameOK = 0; 891 } 892 } 893 894 /* If the current pTimeData does not contain a valid signal, there nothing else we can do, so bail. */ 895 if ( ! IS_OUTPUT_VALID(ErrorStatus) ) { 896 goto bail; 897 } 898 899 { 900 /* Export data into streaminfo structure */ 901 self->streamInfo.sampleRate = self->streamInfo.aacSampleRate; 902 self->streamInfo.frameSize = self->streamInfo.aacSamplesPerFrame; 903 } 904 self->streamInfo.numChannels = self->streamInfo.aacNumChannels; 905 906 907 908 CAacDecoder_SyncQmfMode(self); 909 910 /* sbr decoder */ 911 912 if (ErrorStatus || (flags & AACDEC_CONCEAL) || self->pAacDecoderStaticChannelInfo[0]->concealmentInfo.concealState > ConcealState_FadeIn) 913 { 914 self->frameOK = 0; /* if an error has occured do concealment in the SBR decoder too */ 915 } 916 917 if (self->sbrEnabled) 918 { 919 SBR_ERROR sbrError = SBRDEC_OK; 920 int chIdx, numCoreChannel = self->streamInfo.numChannels; 921 int chOutMapIdx = ((self->chMapIndex==0) && (numCoreChannel<7)) ? numCoreChannel : self->chMapIndex; 922 923 /* set params */ 924 sbrDecoder_SetParam ( self->hSbrDecoder, 925 SBR_SYSTEM_BITSTREAM_DELAY, 926 self->sbrParams.bsDelay); 927 sbrDecoder_SetParam ( self->hSbrDecoder, 928 SBR_FLUSH_DATA, 929 (flags & AACDEC_FLUSH) ); 930 931 if ( self->streamInfo.aot == AOT_ER_AAC_ELD ) { 932 /* Configure QMF */ 933 sbrDecoder_SetParam ( self->hSbrDecoder, 934 SBR_LD_QMF_TIME_ALIGN, 935 (self->flags & AC_LD_MPS) ? 1 : 0 ); 936 } 937 938 { 939 PCMDMX_ERROR dmxErr; 940 INT maxOutCh = 0; 941 942 dmxErr = pcmDmx_GetParam(self->hPcmUtils, MAX_NUMBER_OF_OUTPUT_CHANNELS, &maxOutCh); 943 if ( (dmxErr == PCMDMX_OK) && (maxOutCh == 1) ) { 944 /* Disable PS processing if we have to create a mono output signal. */ 945 self->psPossible = 0; 946 } 947 } 948 949 950 /* apply SBR processing */ 951 sbrError = sbrDecoder_Apply ( self->hSbrDecoder, 952 pTimeData, 953 &self->streamInfo.numChannels, 954 &self->streamInfo.sampleRate, 955 self->channelOutputMapping[chOutMapIdx], 956 interleaved, 957 self->frameOK, 958 &self->psPossible); 959 960 961 if (sbrError == SBRDEC_OK) { 962 #define UPS_SCALE 2 /* Maximum upsampling factor is 4 (CELP+SBR) */ 963 FIXP_DBL upsampleFactor = FL2FXCONST_DBL(1.0f/(1<<UPS_SCALE)); 964 965 /* Update data in streaminfo structure. Assume that the SBR upsampling factor is either 1 or 2 */ 966 self->flags |= AC_SBR_PRESENT; 967 if (self->streamInfo.aacSampleRate != self->streamInfo.sampleRate) { 968 if (self->streamInfo.frameSize == 768) { 969 upsampleFactor = FL2FXCONST_DBL(8.0f/(3<<UPS_SCALE)); 970 } else { 971 upsampleFactor = FL2FXCONST_DBL(2.0f/(1<<UPS_SCALE)); 972 } 973 } 974 /* Apply upsampling factor to both the core frame length and the core delay */ 975 self->streamInfo.frameSize = (INT)fMult((FIXP_DBL)self->streamInfo.aacSamplesPerFrame<<UPS_SCALE, upsampleFactor); 976 self->streamInfo.outputDelay = (UINT)(INT)fMult((FIXP_DBL)self->streamInfo.outputDelay<<UPS_SCALE, upsampleFactor); 977 self->streamInfo.outputDelay += sbrDecoder_GetDelay( self->hSbrDecoder ); 978 979 if (self->psPossible) { 980 self->flags |= AC_PS_PRESENT; 981 } 982 for (chIdx = numCoreChannel; chIdx < self->streamInfo.numChannels; chIdx+=1) { 983 self->channelType[chIdx] = ACT_FRONT; 984 self->channelIndices[chIdx] = chIdx; 985 } 986 } 987 } 988 989 990 { 991 INT pcmLimiterScale = 0; 992 PCMDMX_ERROR dmxErr = PCMDMX_OK; 993 if ( flags & (AACDEC_INTR | AACDEC_CLRHIST) ) { 994 /* delete data from the past (e.g. mixdown coeficients) */ 995 pcmDmx_Reset( self->hPcmUtils, PCMDMX_RESET_BS_DATA ); 996 } 997 /* do PCM post processing */ 998 dmxErr = pcmDmx_ApplyFrame ( 999 self->hPcmUtils, 1000 pTimeData, 1001 self->streamInfo.frameSize, 1002 &self->streamInfo.numChannels, 1003 interleaved, 1004 self->channelType, 1005 self->channelIndices, 1006 self->channelOutputMapping, 1007 (self->limiterEnableCurr) ? &pcmLimiterScale : NULL 1008 ); 1009 if ( (ErrorStatus == AAC_DEC_OK) 1010 && (dmxErr == PCMDMX_INVALID_MODE) ) { 1011 /* Announce the framework that the current combination of channel configuration and downmix 1012 * settings are not know to produce a predictable behavior and thus maybe produce strange output. */ 1013 ErrorStatus = AAC_DEC_DECODE_FRAME_ERROR; 1014 } 1015 1016 if ( flags & AACDEC_CLRHIST ) { 1017 /* Delete the delayed signal. */ 1018 resetLimiter(self->hLimiter); 1019 } 1020 if (self->limiterEnableCurr) 1021 { 1022 /* Set actual signal parameters */ 1023 setLimiterNChannels(self->hLimiter, self->streamInfo.numChannels); 1024 setLimiterSampleRate(self->hLimiter, self->streamInfo.sampleRate); 1025 1026 applyLimiter( 1027 self->hLimiter, 1028 pTimeData, 1029 self->extGain, 1030 &pcmLimiterScale, 1031 1, 1032 self->extGainDelay, 1033 self->streamInfo.frameSize 1034 ); 1035 1036 /* Announce the additional limiter output delay */ 1037 self->streamInfo.outputDelay += getLimiterDelay(self->hLimiter); 1038 } 1039 } 1040 1041 1042 /* Signal interruption to take effect in next frame. */ 1043 if ( flags & AACDEC_FLUSH ) { 1044 aacDecoder_SignalInterruption(self); 1045 } 1046 1047 /* Update externally visible copy of flags */ 1048 self->streamInfo.flags = self->flags; 1049 1050 bail: 1051 1052 /* Update Statistics */ 1053 aacDecoder_UpdateBitStreamCounters(&self->streamInfo, hBs, nBits, ErrorStatus); 1054 1055 /* Check whether external output buffer is large enough. */ 1056 if (timeDataSize_extern < self->streamInfo.numChannels*self->streamInfo.frameSize) { 1057 ErrorStatus = AAC_DEC_OUTPUT_BUFFER_TOO_SMALL; 1058 } 1059 1060 /* Update external output buffer. */ 1061 if ( IS_OUTPUT_VALID(ErrorStatus) ) { 1062 FDKmemcpy(pTimeData_extern, pTimeData, self->streamInfo.numChannels*self->streamInfo.frameSize*sizeof(*pTimeData)); 1063 } 1064 else { 1065 FDKmemclear(pTimeData_extern, timeDataSize_extern*sizeof(*pTimeData_extern)); 1066 } 1067 1068 return ErrorStatus; 1069 } 1070 1071 LINKSPEC_CPP void aacDecoder_Close ( HANDLE_AACDECODER self ) 1072 { 1073 if (self == NULL) 1074 return; 1075 1076 1077 if (self->hLimiter != NULL) { 1078 destroyLimiter(self->hLimiter); 1079 } 1080 1081 if (self->hPcmUtils != NULL) { 1082 pcmDmx_Close( &self->hPcmUtils ); 1083 } 1084 1085 1086 1087 if (self->hSbrDecoder != NULL) { 1088 sbrDecoder_Close(&self->hSbrDecoder); 1089 } 1090 1091 if (self->hInput != NULL) { 1092 transportDec_Close(&self->hInput); 1093 } 1094 1095 CAacDecoder_Close(self); 1096 } 1097 1098 1099 LINKSPEC_CPP CStreamInfo* aacDecoder_GetStreamInfo ( HANDLE_AACDECODER self ) 1100 { 1101 return CAacDecoder_GetStreamInfo(self); 1102 } 1103 1104 LINKSPEC_CPP INT aacDecoder_GetLibInfo ( LIB_INFO *info ) 1105 { 1106 int i; 1107 1108 if (info == NULL) { 1109 return -1; 1110 } 1111 1112 sbrDecoder_GetLibInfo( info ); 1113 transportDec_GetLibInfo( info ); 1114 FDK_toolsGetLibInfo( info ); 1115 pcmDmx_GetLibInfo( info ); 1116 1117 /* search for next free tab */ 1118 for (i = 0; i < FDK_MODULE_LAST; i++) { 1119 if (info[i].module_id == FDK_NONE) break; 1120 } 1121 if (i == FDK_MODULE_LAST) { 1122 return -1; 1123 } 1124 info += i; 1125 1126 info->module_id = FDK_AACDEC; 1127 /* build own library info */ 1128 info->version = LIB_VERSION(AACDECODER_LIB_VL0, AACDECODER_LIB_VL1, AACDECODER_LIB_VL2); 1129 LIB_VERSION_STRING(info); 1130 info->build_date = AACDECODER_LIB_BUILD_DATE; 1131 info->build_time = AACDECODER_LIB_BUILD_TIME; 1132 info->title = AACDECODER_LIB_TITLE; 1133 1134 /* Set flags */ 1135 info->flags = 0 1136 | CAPF_AAC_LC 1137 | CAPF_ER_AAC_SCAL 1138 | CAPF_AAC_VCB11 1139 | CAPF_AAC_HCR 1140 | CAPF_AAC_RVLC 1141 | CAPF_ER_AAC_LD 1142 | CAPF_ER_AAC_ELD 1143 | CAPF_AAC_CONCEALMENT 1144 | CAPF_AAC_DRC 1145 1146 | CAPF_AAC_MPEG4 1147 1148 | CAPF_AAC_DRM_BSFORMAT 1149 1150 | CAPF_AAC_1024 1151 | CAPF_AAC_960 1152 1153 | CAPF_AAC_512 1154 1155 | CAPF_AAC_480 1156 1157 ; 1158 /* End of flags */ 1159 1160 return 0; 1161 } 1162 1163 1164 1165 1166
