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 /*************************** Fraunhofer IIS FDK Tools *********************** 85 86 Author(s): Andreas Ehret 87 Description: SBR encoder top level processing. 88 89 ******************************************************************************/ 90 91 #include "sbr_encoder.h" 92 93 #include "sbr_ram.h" 94 #include "sbr_rom.h" 95 #include "sbrenc_freq_sca.h" 96 #include "env_bit.h" 97 #include "cmondata.h" 98 #include "sbr_misc.h" 99 #include "sbr.h" 100 #include "qmf.h" 101 102 #include "ps_main.h" 103 104 #define SBRENCODER_LIB_VL0 3 105 #define SBRENCODER_LIB_VL1 2 106 #define SBRENCODER_LIB_VL2 1 107 108 109 110 /***************************************************************************/ 111 /* 112 * SBR Delay balancing definitions. 113 */ 114 115 /* 116 input buffer (1ch) 117 118 |------------ 1537 -------------|-----|---------- 2048 -------------| 119 (core2sbr delay ) ds (read, core and ds area) 120 */ 121 122 #define DOWN_SMPL_FAC (2) 123 124 #define SFL(fl) (fl*DOWN_SMPL_FAC) /* SBR frame length (hardcoded to downsample factor of 2) */ 125 #define STS(fl) (SFL(fl)/64) /* SBR Time Slots */ 126 127 #define DELAY_QMF_ANA (640 - 64) /* Full bandwidth */ 128 #define DELAY_QMF_ANAELD (32) 129 #define DELAY_HYB_ANA (10*64) /* + 0.5 */ 130 #define DELAY_HYB_SYN (6*64 - 32) 131 #define DELAY_QMF_SYNELD (32) 132 #define DELAY_DEC_QMF (6*64) /* Decoder QMF overlap */ 133 #define DELAY_QMF_SYN (2) /* NO_POLY/2 */ 134 #define DELAY_QMF_DS (32) /* QMF synthesis for downsampled time signal */ 135 136 /* Delay in QMF paths */ 137 #define DELAY_SBR(fl) (DELAY_QMF_ANA + (64*STS(fl)-1) + DELAY_QMF_SYN) 138 #define DELAY_PS(fl) (DELAY_QMF_ANA + DELAY_HYB_ANA + DELAY_DEC_QMF + (64*STS(fl)-1) + DELAY_HYB_SYN + DELAY_QMF_SYN) 139 #define DELAY_ELDSBR(fl) (DELAY_QMF_ANAELD + (((fl)+((fl)/2))*2 - 1) + DELAY_QMF_SYNELD) 140 141 /* Delay differences for SBR and SBR+PS */ 142 #define MAX_DS_FILTER_DELAY (34) /* the additional max downsampler filter delay (source fs) */ 143 #define DELAY_AAC2SBR(fl) ((/*RESAMPLER +*/ /*(DELAY_AAC(fl)*2) + */ DELAY_QMF_ANA + DELAY_DEC_QMF + DELAY_QMF_SYN) - DELAY_SBR(fl)) /* 1537 */ 144 #define DELAY_ELD2SBR(fl) ((/*RESAMPLER +*/ /*(DELAY_ELD(fl)*2) + */ DELAY_QMF_ANAELD + DELAY_QMF_SYNELD) - DELAY_ELDSBR(fl)) 145 146 #define DELAY_AAC2PS(fl) ((DELAY_QMF_ANA + DELAY_QMF_DS + /*(DELAY_AAC(fl)*2)*/ + DELAY_QMF_ANA + DELAY_DEC_QMF + DELAY_HYB_SYN + DELAY_QMF_SYN) - DELAY_PS(fl)) /* 2048 - 463*2 */ 147 148 /* Assumption: that the sample delay resulting of of DELAY_AAC2PS is always smaller than the sample delay implied by DELAY_AAC2SBR */ 149 #define MAX_SAMPLE_DELAY (DELAY_AAC2SBR(1024) + MAX_DS_FILTER_DELAY) 150 151 /***************************************************************************/ 152 153 154 155 #define INVALID_TABLE_IDX -1 156 157 /***************************************************************************/ 158 /*! 159 160 \brief Selects the SBR tuning settings to use dependent on number of 161 channels, bitrate, sample rate and core coder 162 163 \return Index to the appropriate table 164 165 ****************************************************************************/ 166 #define DISTANCE_CEIL_VALUE 5000000 167 static INT 168 getSbrTuningTableIndex(UINT bitrate, /*! the total bitrate in bits/sec */ 169 UINT numChannels,/*! the number of channels for the core coder */ 170 UINT sampleRate, /*! the sampling rate of the core coder */ 171 AUDIO_OBJECT_TYPE core, 172 UINT *pBitRateClosest 173 ) 174 { 175 int i, paramSetTop, bitRateClosestLowerIndex=-1, bitRateClosestUpperIndex=-1, found = 0; 176 UINT bitRateClosestUpper = 0, bitRateClosestLower=DISTANCE_CEIL_VALUE; 177 178 FDK_ASSERT(SBRENC_TUNING_SIZE == sizeof(sbrTuningTable)/sizeof(sbrTuningTable[0])); 179 180 if (core == AOT_ER_AAC_ELD) { 181 paramSetTop = SBRENC_TUNING_SIZE; 182 i = SBRENC_AACLC_TUNING_SIZE; 183 } else { 184 paramSetTop = SBRENC_AACLC_TUNING_SIZE; 185 i = 0; 186 } 187 188 for (; i < paramSetTop ; i++) { 189 if ( numChannels == sbrTuningTable [i].numChannels 190 && sampleRate == sbrTuningTable [i].sampleRate ) 191 { 192 found = 1; 193 if ((bitrate >= sbrTuningTable [i].bitrateFrom) && 194 (bitrate < sbrTuningTable [i].bitrateTo)) { 195 bitRateClosestLower = bitrate; 196 bitRateClosestUpper = bitrate; 197 //FDKprintf("entry %d\n", i); 198 return i ; 199 } else { 200 if ( sbrTuningTable [i].bitrateFrom > bitrate ) { 201 if (sbrTuningTable [i].bitrateFrom < bitRateClosestLower) { 202 bitRateClosestLower = sbrTuningTable [i].bitrateFrom; 203 bitRateClosestLowerIndex = i; 204 } 205 } 206 if ( sbrTuningTable [i].bitrateTo <= bitrate ) { 207 if (sbrTuningTable [i].bitrateTo > bitRateClosestUpper) { 208 bitRateClosestUpper = sbrTuningTable [i].bitrateTo-1; 209 bitRateClosestUpperIndex = i; 210 } 211 } 212 } 213 } 214 } 215 216 if (pBitRateClosest != NULL) 217 { 218 /* Is there was at least one matching tuning entry found then pick the least distance bit rate */ 219 if (found) 220 { 221 int distanceUpper=DISTANCE_CEIL_VALUE, distanceLower=DISTANCE_CEIL_VALUE; 222 if (bitRateClosestLowerIndex >= 0) { 223 distanceLower = sbrTuningTable [bitRateClosestLowerIndex].bitrateFrom - bitrate; 224 } 225 if (bitRateClosestUpperIndex >= 0) { 226 distanceUpper = bitrate - sbrTuningTable [bitRateClosestUpperIndex].bitrateTo; 227 } 228 if ( distanceUpper < distanceLower ) 229 { 230 *pBitRateClosest = bitRateClosestUpper; 231 } else { 232 *pBitRateClosest = bitRateClosestLower; 233 } 234 } else { 235 *pBitRateClosest = 0; 236 } 237 } 238 239 return INVALID_TABLE_IDX; 240 } 241 242 /***************************************************************************/ 243 /*! 244 245 \brief Selects the PS tuning settings to use dependent on bitrate 246 and core coder 247 248 \return Index to the appropriate table 249 250 ****************************************************************************/ 251 static INT 252 getPsTuningTableIndex(UINT bitrate, UINT *pBitRateClosest){ 253 254 INT i, paramSets = sizeof (psTuningTable) / sizeof (psTuningTable [0]); 255 int bitRateClosestLowerIndex=-1, bitRateClosestUpperIndex=-1; 256 UINT bitRateClosestUpper = 0, bitRateClosestLower=DISTANCE_CEIL_VALUE; 257 258 for (i = 0 ; i < paramSets ; i++) { 259 if ((bitrate >= psTuningTable [i].bitrateFrom) && 260 (bitrate < psTuningTable [i].bitrateTo)) { 261 return i ; 262 } else { 263 if ( psTuningTable [i].bitrateFrom > bitrate ) { 264 if (psTuningTable [i].bitrateFrom < bitRateClosestLower) { 265 bitRateClosestLower = psTuningTable [i].bitrateFrom; 266 bitRateClosestLowerIndex = i; 267 } 268 } 269 if ( psTuningTable [i].bitrateTo <= bitrate ) { 270 if (psTuningTable [i].bitrateTo > bitRateClosestUpper) { 271 bitRateClosestUpper = psTuningTable [i].bitrateTo-1; 272 bitRateClosestUpperIndex = i; 273 } 274 } 275 } 276 } 277 278 if (pBitRateClosest != NULL) 279 { 280 int distanceUpper=DISTANCE_CEIL_VALUE, distanceLower=DISTANCE_CEIL_VALUE; 281 if (bitRateClosestLowerIndex >= 0) { 282 distanceLower = sbrTuningTable [bitRateClosestLowerIndex].bitrateFrom - bitrate; 283 } 284 if (bitRateClosestUpperIndex >= 0) { 285 distanceUpper = bitrate - sbrTuningTable [bitRateClosestUpperIndex].bitrateTo; 286 } 287 if ( distanceUpper < distanceLower ) 288 { 289 *pBitRateClosest = bitRateClosestUpper; 290 } else { 291 *pBitRateClosest = bitRateClosestLower; 292 } 293 } 294 295 return INVALID_TABLE_IDX; 296 } 297 298 299 /***************************************************************************/ 300 /*! 301 302 \brief tells us, if for the given coreCoder, bitrate, number of channels 303 and input sampling rate an SBR setting is available. If yes, it 304 tells us also the core sampling rate we would need to run with 305 306 \return a flag indicating success: yes (1) or no (0) 307 308 ****************************************************************************/ 309 static UINT 310 FDKsbrEnc_IsSbrSettingAvail (UINT bitrate, /*! the total bitrate in bits/sec */ 311 UINT vbrMode, /*! the vbr paramter, 0 means constant bitrate */ 312 UINT numOutputChannels,/*! the number of channels for the core coder */ 313 UINT sampleRateInput, /*! the input sample rate [in Hz] */ 314 AUDIO_OBJECT_TYPE core 315 ) 316 { 317 INT idx = INVALID_TABLE_IDX; 318 UINT sampleRateCore; 319 320 if (sampleRateInput < 16000) 321 return 0; 322 323 if (bitrate==0) { 324 /* map vbr quality to bitrate */ 325 if (vbrMode < 30) 326 bitrate = 24000; 327 else if (vbrMode < 40) 328 bitrate = 28000; 329 else if (vbrMode < 60) 330 bitrate = 32000; 331 else if (vbrMode < 75) 332 bitrate = 40000; 333 else 334 bitrate = 48000; 335 bitrate *= numOutputChannels; 336 } 337 338 /* try DOWN_SMPL_FAC of the input sampling rate */ 339 sampleRateCore = sampleRateInput/DOWN_SMPL_FAC; 340 idx = getSbrTuningTableIndex(bitrate, numOutputChannels, sampleRateCore, core, NULL); 341 342 return (idx == INVALID_TABLE_IDX ? 0 : 1); 343 } 344 345 346 /***************************************************************************/ 347 /*! 348 349 \brief Adjusts the SBR settings according to the chosen core coder 350 settings which are accessible via config->codecSettings 351 352 \return A flag indicating success: yes (1) or no (0) 353 354 ****************************************************************************/ 355 static UINT 356 FDKsbrEnc_AdjustSbrSettings (const sbrConfigurationPtr config, /*! output, modified */ 357 UINT bitRate, /*! the total bitrate in bits/sec */ 358 UINT numChannels, /*! the core coder number of channels */ 359 UINT fsCore, /*! the core coder sampling rate in Hz */ 360 UINT transFac, /*! the short block to long block ratio */ 361 UINT standardBitrate, /*! the standard bitrate per channel in bits/sec */ 362 UINT vbrMode, /*! the vbr paramter, 0 poor quality .. 100 high quality*/ 363 UINT useSpeechConfig, /*!< adapt tuning parameters for speech ? */ 364 UINT lcsMode, /*! the low complexity stereo mode */ 365 UINT bParametricStereo, /*!< use parametric stereo */ 366 AUDIO_OBJECT_TYPE core) /* Core audio codec object type */ 367 { 368 INT idx = INVALID_TABLE_IDX; 369 UINT sampleRate; 370 371 /* set the codec settings */ 372 config->codecSettings.bitRate = bitRate; 373 config->codecSettings.nChannels = numChannels; 374 config->codecSettings.sampleFreq = fsCore; 375 config->codecSettings.transFac = transFac; 376 config->codecSettings.standardBitrate = standardBitrate; 377 sampleRate = fsCore * DOWN_SMPL_FAC; 378 379 if (bitRate==0) { 380 /* map vbr quality to bitrate */ 381 if (vbrMode < 30) 382 bitRate = 24000; 383 else if (vbrMode < 40) 384 bitRate = 28000; 385 else if (vbrMode < 60) 386 bitRate = 32000; 387 else if (vbrMode < 75) 388 bitRate = 40000; 389 else 390 bitRate = 48000; 391 bitRate *= numChannels; 392 /* fix to enable mono vbrMode<40 @ 44.1 of 48kHz */ 393 if (numChannels==1) { 394 if (sampleRate==44100 || sampleRate==48000) { 395 if (vbrMode<40) bitRate = 32000; 396 } 397 } 398 } 399 400 idx = getSbrTuningTableIndex(bitRate,numChannels,fsCore, core, NULL); 401 402 if (idx != INVALID_TABLE_IDX) { 403 config->startFreq = sbrTuningTable[idx].startFreq ; 404 config->stopFreq = sbrTuningTable[idx].stopFreq ; 405 if (useSpeechConfig) { 406 config->startFreq = sbrTuningTable[idx].startFreqSpeech; 407 config->stopFreq = sbrTuningTable[idx].stopFreqSpeech; 408 } 409 410 config->sbr_noise_bands = sbrTuningTable[idx].numNoiseBands ; 411 if (core == AOT_ER_AAC_ELD) 412 config->init_amp_res_FF = SBR_AMP_RES_1_5; 413 config->noiseFloorOffset= sbrTuningTable[idx].noiseFloorOffset; 414 415 config->ana_max_level = sbrTuningTable[idx].noiseMaxLevel ; 416 config->stereoMode = sbrTuningTable[idx].stereoMode ; 417 config->freqScale = sbrTuningTable[idx].freqScale ; 418 419 /* adjust usage of parametric coding dependent on bitrate and speech config flag */ 420 if (useSpeechConfig) 421 config->parametricCoding = 0; 422 423 if (core == AOT_ER_AAC_ELD) { 424 if (bitRate < 28000) 425 config->init_amp_res_FF = SBR_AMP_RES_3_0; 426 config->SendHeaderDataTime = -1; 427 } 428 429 if (numChannels == 1) { 430 if (bitRate < 16000) { 431 config->parametricCoding = 0; 432 } 433 } 434 else { 435 if (bitRate < 20000) { 436 config->parametricCoding = 0; 437 } 438 } 439 440 config->useSpeechConfig = useSpeechConfig; 441 442 /* PS settings */ 443 config->bParametricStereo = bParametricStereo; 444 445 return 1 ; 446 } 447 else { 448 return 0 ; 449 } 450 } 451 452 /***************************************************************************** 453 454 functionname: FDKsbrEnc_InitializeSbrDefaults 455 description: initializes the SBR confifuration 456 returns: error status 457 input: - core codec type, 458 - fac of SBR to core frame length, 459 - core frame length 460 output: initialized SBR configuration 461 462 *****************************************************************************/ 463 static UINT 464 FDKsbrEnc_InitializeSbrDefaults (sbrConfigurationPtr config, 465 INT coreSbrFrameLenFac, 466 UINT codecGranuleLen) 467 { 468 if ( (coreSbrFrameLenFac != 2) || 469 (codecGranuleLen*coreSbrFrameLenFac > QMF_CHANNELS*QMF_MAX_TIME_SLOTS) ) 470 return(1); 471 472 config->SendHeaderDataTime = 1000; 473 config->useWaveCoding = 0; 474 config->crcSbr = 0; 475 config->dynBwSupported = 1; 476 config->tran_thr = 13000; 477 config->parametricCoding = 1; 478 479 config->sbrFrameSize = codecGranuleLen * coreSbrFrameLenFac; 480 481 482 /* sbr default parameters */ 483 config->sbr_data_extra = 0; 484 config->amp_res = SBR_AMP_RES_3_0 ; 485 config->tran_fc = 0 ; 486 config->tran_det_mode = 1 ; 487 config->spread = 1 ; 488 config->stat = 0 ; 489 config->e = 1 ; 490 config->deltaTAcrossFrames = 1 ; 491 config->dF_edge_1stEnv = FL2FXCONST_DBL(0.3f) ; 492 config->dF_edge_incr = FL2FXCONST_DBL(0.3f) ; 493 494 config->sbr_invf_mode = INVF_SWITCHED; 495 config->sbr_xpos_mode = XPOS_LC; 496 config->sbr_xpos_ctrl = SBR_XPOS_CTRL_DEFAULT; 497 config->sbr_xpos_level = 0; 498 config->useSaPan = 0; 499 config->dynBwEnabled = 0; 500 config->bDownSampledSbr = 0; 501 502 503 /* the following parameters are overwritten by the FDKsbrEnc_AdjustSbrSettings() function since 504 they are included in the tuning table */ 505 config->stereoMode = SBR_SWITCH_LRC; 506 config->ana_max_level = 6; 507 config->noiseFloorOffset = 0; 508 config->startFreq = 5; /* 5.9 respectively 6.0 kHz at fs = 44.1/48 kHz */ 509 config->stopFreq = 9; /* 16.2 respectively 16.8 kHz at fs = 44.1/48 kHz */ 510 511 512 /* header_extra_1 */ 513 config->freqScale = SBR_FREQ_SCALE_DEFAULT; 514 config->alterScale = SBR_ALTER_SCALE_DEFAULT; 515 config->sbr_noise_bands = SBR_NOISE_BANDS_DEFAULT; 516 517 /* header_extra_2 */ 518 config->sbr_limiter_bands = SBR_LIMITER_BANDS_DEFAULT; 519 config->sbr_limiter_gains = SBR_LIMITER_GAINS_DEFAULT; 520 config->sbr_interpol_freq = SBR_INTERPOL_FREQ_DEFAULT; 521 config->sbr_smoothing_length = SBR_SMOOTHING_LENGTH_DEFAULT; 522 523 return 1; 524 } 525 526 527 /***************************************************************************** 528 529 functionname: DeleteEnvChannel 530 description: frees memory of one SBR channel 531 returns: - 532 input: handle of channel 533 output: released handle 534 535 *****************************************************************************/ 536 static void 537 deleteEnvChannel (HANDLE_ENV_CHANNEL hEnvCut) 538 { 539 if (hEnvCut) { 540 541 FDKsbrEnc_DeleteTonCorrParamExtr(&hEnvCut->TonCorr); 542 543 FDKsbrEnc_deleteExtractSbrEnvelope (&hEnvCut->sbrExtractEnvelope); 544 } 545 546 } 547 548 549 /***************************************************************************** 550 551 functionname: sbrEncoder_ChannelClose 552 description: close the channel coding handle 553 returns: 554 input: phSbrChannel 555 output: 556 557 *****************************************************************************/ 558 static void 559 sbrEncoder_ChannelClose(HANDLE_SBR_CHANNEL hSbrChannel) 560 { 561 if (hSbrChannel != NULL) 562 { 563 deleteEnvChannel (&hSbrChannel->hEnvChannel); 564 } 565 } 566 567 /***************************************************************************** 568 569 functionname: sbrEncoder_ElementClose 570 description: close the channel coding handle 571 returns: 572 input: phSbrChannel 573 output: 574 575 *****************************************************************************/ 576 static void 577 sbrEncoder_ElementClose(HANDLE_SBR_ELEMENT *phSbrElement) 578 { 579 HANDLE_SBR_ELEMENT hSbrElement = *phSbrElement; 580 581 if (hSbrElement!=NULL) { 582 if (hSbrElement->sbrConfigData.v_k_master) 583 FreeRam_Sbr_v_k_master(&hSbrElement->sbrConfigData.v_k_master); 584 if (hSbrElement->sbrConfigData.freqBandTable[LO]) 585 FreeRam_Sbr_freqBandTableLO(&hSbrElement->sbrConfigData.freqBandTable[LO]); 586 if (hSbrElement->sbrConfigData.freqBandTable[HI]) 587 FreeRam_Sbr_freqBandTableHI(&hSbrElement->sbrConfigData.freqBandTable[HI]); 588 589 FreeRam_SbrElement(phSbrElement); 590 } 591 return ; 592 593 } 594 595 596 void sbrEncoder_Close (HANDLE_SBR_ENCODER *phSbrEncoder) 597 { 598 HANDLE_SBR_ENCODER hSbrEncoder = *phSbrEncoder; 599 600 if (hSbrEncoder != NULL) 601 { 602 int el, ch; 603 604 for (el=0; el<(6); el++) 605 { 606 if (hSbrEncoder->sbrElement[el]!=NULL) { 607 sbrEncoder_ElementClose(&hSbrEncoder->sbrElement[el]); 608 } 609 } 610 611 /* Close sbr Channels */ 612 for (ch=0; ch<(6); ch++) 613 { 614 if (hSbrEncoder->pSbrChannel[ch]) { 615 sbrEncoder_ChannelClose(hSbrEncoder->pSbrChannel[ch]); 616 FreeRam_SbrChannel(&hSbrEncoder->pSbrChannel[ch]); 617 } 618 619 if (hSbrEncoder->QmfAnalysis[ch].FilterStates) 620 FreeRam_Sbr_QmfStatesAnalysis((FIXP_QAS**)&hSbrEncoder->QmfAnalysis[ch].FilterStates); 621 622 623 } 624 625 if (hSbrEncoder->hParametricStereo) 626 PSEnc_Destroy(&hSbrEncoder->hParametricStereo); 627 if (hSbrEncoder->qmfSynthesisPS.FilterStates) 628 FreeRam_PsQmfStatesSynthesis((FIXP_DBL**)&hSbrEncoder->qmfSynthesisPS.FilterStates); 629 630 /* Release Overlay */ 631 FreeRam_SbrDynamic_RAM((FIXP_DBL**)&hSbrEncoder->pSBRdynamic_RAM); 632 633 634 FreeRam_SbrEncoder(phSbrEncoder); 635 } 636 637 } 638 639 /***************************************************************************** 640 641 functionname: updateFreqBandTable 642 description: updates vk_master 643 returns: - 644 input: config handle 645 output: error info 646 647 *****************************************************************************/ 648 static INT updateFreqBandTable(HANDLE_SBR_CONFIG_DATA sbrConfigData, 649 HANDLE_SBR_HEADER_DATA sbrHeaderData, 650 INT noQmfChannels) 651 { 652 INT k0, k2; 653 654 if(FDKsbrEnc_FindStartAndStopBand(sbrConfigData->sampleFreq, 655 noQmfChannels, 656 sbrHeaderData->sbr_start_frequency, 657 sbrHeaderData->sbr_stop_frequency, 658 sbrHeaderData->sampleRateMode, 659 &k0, &k2)) 660 return(1); 661 662 663 if(FDKsbrEnc_UpdateFreqScale(sbrConfigData->v_k_master, &sbrConfigData->num_Master, 664 k0, k2, sbrHeaderData->freqScale, 665 sbrHeaderData->alterScale)) 666 return(1); 667 668 669 sbrHeaderData->sbr_xover_band=0; 670 671 672 if(FDKsbrEnc_UpdateHiRes(sbrConfigData->freqBandTable[HI], 673 &sbrConfigData->nSfb[HI], 674 sbrConfigData->v_k_master, 675 sbrConfigData->num_Master , 676 &sbrHeaderData->sbr_xover_band, 677 sbrHeaderData->sampleRateMode, 678 noQmfChannels)) 679 return(1); 680 681 682 FDKsbrEnc_UpdateLoRes(sbrConfigData->freqBandTable[LO], 683 &sbrConfigData->nSfb[LO], 684 sbrConfigData->freqBandTable[HI], 685 sbrConfigData->nSfb[HI]); 686 687 sbrConfigData->xOverFreq = (sbrConfigData->freqBandTable[LOW_RES][0] * sbrConfigData->sampleFreq / noQmfChannels+1)>>1; 688 689 return (0); 690 } 691 692 693 /***************************************************************************** 694 695 functionname: resetEnvChannel 696 description: resets parameters and allocates memory 697 returns: error status 698 input: 699 output: hEnv 700 701 *****************************************************************************/ 702 static INT resetEnvChannel (HANDLE_SBR_CONFIG_DATA sbrConfigData, 703 HANDLE_SBR_HEADER_DATA sbrHeaderData, 704 HANDLE_ENV_CHANNEL hEnv) 705 { 706 /* note !!! hEnv->encEnvData.noOfnoisebands will be updated later in function FDKsbrEnc_extractSbrEnvelope !!!*/ 707 hEnv->TonCorr.sbrNoiseFloorEstimate.noiseBands = sbrHeaderData->sbr_noise_bands; 708 709 710 if(FDKsbrEnc_ResetTonCorrParamExtr(&hEnv->TonCorr, 711 sbrConfigData->xposCtrlSwitch, 712 sbrConfigData->freqBandTable[HI][0], 713 sbrConfigData->v_k_master, 714 sbrConfigData->num_Master, 715 sbrConfigData->sampleFreq, 716 sbrConfigData->freqBandTable, 717 sbrConfigData->nSfb, 718 sbrConfigData->noQmfBands)) 719 return(1); 720 721 hEnv->sbrCodeNoiseFloor.nSfb[LO] = hEnv->TonCorr.sbrNoiseFloorEstimate.noNoiseBands; 722 hEnv->sbrCodeNoiseFloor.nSfb[HI] = hEnv->TonCorr.sbrNoiseFloorEstimate.noNoiseBands; 723 724 hEnv->sbrCodeEnvelope.nSfb[LO] = sbrConfigData->nSfb[LO]; 725 hEnv->sbrCodeEnvelope.nSfb[HI] = sbrConfigData->nSfb[HI]; 726 727 hEnv->encEnvData.noHarmonics = sbrConfigData->nSfb[HI]; 728 729 hEnv->sbrCodeEnvelope.upDate = 0; 730 hEnv->sbrCodeNoiseFloor.upDate = 0; 731 732 return (0); 733 } 734 735 /* ****************************** FDKsbrEnc_SbrGetXOverFreq ******************************/ 736 /** 737 * @fn 738 * @brief calculates the closest possible crossover frequency 739 * @return the crossover frequency SBR accepts 740 * 741 */ 742 static INT 743 FDKsbrEnc_SbrGetXOverFreq(HANDLE_SBR_ELEMENT hEnv, /*!< handle to SBR encoder instance */ 744 INT xoverFreq) /*!< from core coder suggested crossover frequency */ 745 { 746 INT band; 747 INT lastDiff, newDiff; 748 INT cutoffSb; 749 750 UCHAR *RESTRICT pVKMaster = hEnv->sbrConfigData.v_k_master; 751 752 /* Check if there is a matching cutoff frequency in the master table */ 753 cutoffSb = (4*xoverFreq * hEnv->sbrConfigData.noQmfBands / hEnv->sbrConfigData.sampleFreq + 1)>>1; 754 lastDiff = cutoffSb; 755 for (band = 0; band < hEnv->sbrConfigData.num_Master; band++) { 756 757 newDiff = fixp_abs((INT)pVKMaster[band] - cutoffSb); 758 759 if(newDiff >= lastDiff) { 760 band--; 761 break; 762 } 763 764 lastDiff = newDiff; 765 } 766 767 return ((pVKMaster[band] * hEnv->sbrConfigData.sampleFreq/hEnv->sbrConfigData.noQmfBands+1)>>1); 768 } 769 770 /***************************************************************************** 771 772 functionname: FDKsbrEnc_EnvEncodeFrame 773 description: performs the sbr envelope calculation for one element 774 returns: 775 input: 776 output: 777 778 *****************************************************************************/ 779 INT 780 FDKsbrEnc_EnvEncodeFrame(HANDLE_SBR_ENCODER hEnvEncoder, 781 int iElement, 782 INT_PCM *samples, /*!< time samples, always interleaved */ 783 UINT timeInStride, /*!< time buffer channel interleaving stride */ 784 UINT *sbrDataBits, /*!< Size of SBR payload */ 785 UCHAR *sbrData, /*!< SBR payload */ 786 int clearOutput /*!< Do not consider any input signal */ 787 ) 788 { 789 HANDLE_SBR_ELEMENT hSbrElement = hEnvEncoder->sbrElement[iElement]; 790 FDK_CRCINFO crcInfo; 791 INT crcReg; 792 INT ch; 793 INT band; 794 INT cutoffSb; 795 INT newXOver; 796 797 if (hEnvEncoder == NULL) 798 return -1; 799 800 hSbrElement = hEnvEncoder->sbrElement[iElement]; 801 802 if (hSbrElement == NULL) 803 return -1; 804 805 806 /* header bitstream handling */ 807 HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData = &hSbrElement->sbrBitstreamData; 808 809 INT psHeaderActive = 0; 810 sbrBitstreamData->HeaderActive = 0; 811 812 /* Anticipate PS header because of internal PS bitstream delay in order to be in sync with SBR header. */ 813 if ( sbrBitstreamData->CountSendHeaderData==(sbrBitstreamData->NrSendHeaderData-1) ) 814 { 815 psHeaderActive = 1; 816 } 817 818 /* Signal SBR header to be written into bitstream */ 819 if ( sbrBitstreamData->CountSendHeaderData==0 ) 820 { 821 sbrBitstreamData->HeaderActive = 1; 822 } 823 824 /* Increment header interval counter */ 825 if (sbrBitstreamData->NrSendHeaderData == 0) { 826 sbrBitstreamData->CountSendHeaderData = 1; 827 } 828 else { 829 if (sbrBitstreamData->CountSendHeaderData >= 0) { 830 sbrBitstreamData->CountSendHeaderData++; 831 sbrBitstreamData->CountSendHeaderData %= sbrBitstreamData->NrSendHeaderData; 832 } 833 } 834 835 if (hSbrElement->CmonData.dynBwEnabled ) { 836 INT i; 837 for ( i = 4; i > 0; i-- ) 838 hSbrElement->dynXOverFreqDelay[i] = hSbrElement->dynXOverFreqDelay[i-1]; 839 840 hSbrElement->dynXOverFreqDelay[0] = hSbrElement->CmonData.dynXOverFreqEnc; 841 if (hSbrElement->dynXOverFreqDelay[1] > hSbrElement->dynXOverFreqDelay[2]) 842 newXOver = hSbrElement->dynXOverFreqDelay[2]; 843 else 844 newXOver = hSbrElement->dynXOverFreqDelay[1]; 845 846 /* has the crossover frequency changed? */ 847 if ( hSbrElement->sbrConfigData.dynXOverFreq != newXOver ) { 848 849 /* get corresponding master band */ 850 cutoffSb = ((4* newXOver * hSbrElement->sbrConfigData.noQmfBands 851 / hSbrElement->sbrConfigData.sampleFreq)+1)>>1; 852 853 for ( band = 0; band < hSbrElement->sbrConfigData.num_Master; band++ ) { 854 if ( cutoffSb == hSbrElement->sbrConfigData.v_k_master[band] ) 855 break; 856 } 857 FDK_ASSERT( band < hSbrElement->sbrConfigData.num_Master ); 858 859 hSbrElement->sbrConfigData.dynXOverFreq = newXOver; 860 hSbrElement->sbrHeaderData.sbr_xover_band = band; 861 hSbrElement->sbrBitstreamData.HeaderActive=1; 862 psHeaderActive = 1; /* ps header is one frame delayed */ 863 864 /* 865 update vk_master table 866 */ 867 if(updateFreqBandTable(&hSbrElement->sbrConfigData, 868 &hSbrElement->sbrHeaderData, 869 hSbrElement->sbrConfigData.noQmfBands)) 870 return(1); 871 872 873 /* reset SBR channels */ 874 INT nEnvCh = hSbrElement->sbrConfigData.nChannels; 875 for ( ch = 0; ch < nEnvCh; ch++ ) { 876 if(resetEnvChannel (&hSbrElement->sbrConfigData, 877 &hSbrElement->sbrHeaderData, 878 &hSbrElement->sbrChannel[ch]->hEnvChannel)) 879 return(1); 880 881 } 882 } 883 } 884 885 /* 886 allocate space for dummy header and crc 887 */ 888 crcReg = FDKsbrEnc_InitSbrBitstream(&hSbrElement->CmonData, 889 hSbrElement->payloadDelayLine[hEnvEncoder->nBitstrDelay], 890 MAX_PAYLOAD_SIZE*sizeof(UCHAR), 891 &crcInfo, 892 hSbrElement->sbrConfigData.sbrSyntaxFlags); 893 894 INT error = noError; 895 896 /* Temporal Envelope Data */ 897 SBR_FRAME_TEMP_DATA _fData; 898 SBR_FRAME_TEMP_DATA *fData = &_fData; 899 SBR_ENV_TEMP_DATA eData[MAX_NUM_CHANNELS]; 900 901 /* Init Temporal Envelope Data */ 902 { 903 int i; 904 905 FDKmemclear(&eData[0], sizeof(SBR_ENV_TEMP_DATA)); 906 FDKmemclear(&eData[1], sizeof(SBR_ENV_TEMP_DATA)); 907 FDKmemclear(fData, sizeof(SBR_FRAME_TEMP_DATA)); 908 909 for(i=0; i<MAX_NUM_NOISE_VALUES; i++) 910 fData->res[i] = FREQ_RES_HIGH; 911 } 912 913 914 if (!clearOutput) 915 { 916 /* 917 * Transform audio data into QMF domain 918 */ 919 for(ch = 0; ch < hSbrElement->sbrConfigData.nChannels; ch++) 920 { 921 HANDLE_ENV_CHANNEL h_envChan = &hSbrElement->sbrChannel[ch]->hEnvChannel; 922 HANDLE_SBR_EXTRACT_ENVELOPE sbrExtrEnv = &h_envChan->sbrExtractEnvelope; 923 924 if(hSbrElement->elInfo.fParametricStereo == 0) 925 { 926 C_ALLOC_SCRATCH_START(qmfWorkBuffer, FIXP_DBL, QMF_CHANNELS*2); 927 QMF_SCALE_FACTOR tmpScale; 928 FIXP_DBL **pQmfReal, **pQmfImag; 929 930 931 /* Obtain pointers to QMF buffers. */ 932 pQmfReal = sbrExtrEnv->rBuffer; 933 pQmfImag = sbrExtrEnv->iBuffer; 934 935 qmfAnalysisFiltering( hSbrElement->hQmfAnalysis[ch], 936 pQmfReal, 937 pQmfImag, 938 &tmpScale, 939 samples + hSbrElement->elInfo.ChannelIndex[ch], 940 timeInStride, 941 qmfWorkBuffer ); 942 943 C_ALLOC_SCRATCH_END(qmfWorkBuffer, FIXP_DBL, QMF_CHANNELS*2); 944 945 h_envChan->qmfScale = tmpScale.lb_scale + 7; 946 947 } /* fParametricStereo == 0 */ 948 949 950 /* 951 Parametric Stereo processing 952 */ 953 if (hSbrElement->elInfo.fParametricStereo) 954 { 955 956 /* Limit Parametric Stereo to one instance */ 957 FDK_ASSERT(ch == 0); 958 959 960 if(error == noError){ 961 /* parametric stereo processing: 962 - input: 963 o left and right time domain samples 964 - processing: 965 o stereo qmf analysis 966 o stereo hybrid analysis 967 o ps parameter extraction 968 o downmix + hybrid synthesis 969 - output: 970 o downmixed qmf data is written to sbrExtrEnv->rBuffer and sbrExtrEnv->iBuffer 971 */ 972 SCHAR qmfScale; 973 INT_PCM* pSamples[2] = {samples + hSbrElement->elInfo.ChannelIndex[0],samples + hSbrElement->elInfo.ChannelIndex[1]}; 974 error = FDKsbrEnc_PSEnc_ParametricStereoProcessing( hEnvEncoder->hParametricStereo, 975 pSamples, 976 timeInStride, 977 hSbrElement->hQmfAnalysis, 978 sbrExtrEnv->rBuffer, 979 sbrExtrEnv->iBuffer, 980 samples + hSbrElement->elInfo.ChannelIndex[ch], 981 &hEnvEncoder->qmfSynthesisPS, 982 &qmfScale, 983 psHeaderActive ); 984 if (noError != error) 985 { 986 error = handBack(error); 987 } 988 h_envChan->qmfScale = (int)qmfScale; 989 } 990 991 992 } /* if (hEnvEncoder->hParametricStereo) */ 993 994 /* 995 996 Extract Envelope relevant things from QMF data 997 998 */ 999 FDKsbrEnc_extractSbrEnvelope1( 1000 &hSbrElement->sbrConfigData, 1001 &hSbrElement->sbrHeaderData, 1002 &hSbrElement->sbrBitstreamData, 1003 h_envChan, 1004 &hSbrElement->CmonData, 1005 &eData[ch], 1006 fData 1007 ); 1008 1009 } /* hEnvEncoder->sbrConfigData.nChannels */ 1010 } 1011 1012 /* 1013 Process Envelope relevant things and calculate envelope data and write payload 1014 */ 1015 FDKsbrEnc_extractSbrEnvelope2( 1016 &hSbrElement->sbrConfigData, 1017 &hSbrElement->sbrHeaderData, 1018 (hSbrElement->elInfo.fParametricStereo) ? hEnvEncoder->hParametricStereo : NULL, 1019 &hSbrElement->sbrBitstreamData, 1020 &hSbrElement->sbrChannel[0]->hEnvChannel, 1021 &hSbrElement->sbrChannel[1]->hEnvChannel, 1022 &hSbrElement->CmonData, 1023 eData, 1024 fData, 1025 clearOutput 1026 ); 1027 1028 /* 1029 format payload, calculate crc 1030 */ 1031 FDKsbrEnc_AssembleSbrBitstream(&hSbrElement->CmonData, &crcInfo, crcReg, hSbrElement->sbrConfigData.sbrSyntaxFlags); 1032 1033 /* 1034 save new payload, set to zero length if greater than MAX_PAYLOAD_SIZE 1035 */ 1036 hSbrElement->payloadDelayLineSize[hEnvEncoder->nBitstrDelay] = FDKgetValidBits(&hSbrElement->CmonData.sbrBitbuf); 1037 1038 if(hSbrElement->payloadDelayLineSize[hEnvEncoder->nBitstrDelay] > (MAX_PAYLOAD_SIZE<<3)) 1039 hSbrElement->payloadDelayLineSize[hEnvEncoder->nBitstrDelay]=0; 1040 1041 /* While filling the Delay lines, sbrData is NULL */ 1042 if (sbrData) { 1043 *sbrDataBits = hSbrElement->payloadDelayLineSize[0]; 1044 FDKmemcpy(sbrData, hSbrElement->payloadDelayLine[0], (hSbrElement->payloadDelayLineSize[0]+7)>>3); 1045 1046 1047 } 1048 1049 1050 /*******************************/ 1051 1052 if (hEnvEncoder->fTimeDomainDownsampling) 1053 { 1054 int ch; 1055 int nChannels = hSbrElement->sbrConfigData.nChannels; 1056 1057 for (ch=0; ch < nChannels; ch++) 1058 { 1059 INT nOutSamples; 1060 1061 FDKaacEnc_Downsample(&hSbrElement->sbrChannel[ch]->downSampler, 1062 samples + hSbrElement->elInfo.ChannelIndex[ch] + hEnvEncoder->bufferOffset, 1063 hSbrElement->sbrConfigData.frameSize, 1064 timeInStride, 1065 samples + hSbrElement->elInfo.ChannelIndex[ch], 1066 &nOutSamples, 1067 hEnvEncoder->nChannels); 1068 } 1069 } /* downsample */ 1070 1071 1072 return (0); 1073 } 1074 1075 /***************************************************************************** 1076 1077 functionname: createEnvChannel 1078 description: initializes parameters and allocates memory 1079 returns: error status 1080 input: 1081 output: hEnv 1082 1083 *****************************************************************************/ 1084 1085 static INT 1086 createEnvChannel (HANDLE_ENV_CHANNEL hEnv, 1087 INT channel 1088 ,UCHAR* dynamic_RAM 1089 ) 1090 { 1091 FDKmemclear(hEnv,sizeof (struct ENV_CHANNEL)); 1092 1093 if ( FDKsbrEnc_CreateTonCorrParamExtr(&hEnv->TonCorr, 1094 channel) ) 1095 { 1096 return(1); 1097 } 1098 1099 if ( FDKsbrEnc_CreateExtractSbrEnvelope (&hEnv->sbrExtractEnvelope, 1100 channel 1101 ,/*chan*/0 1102 ,dynamic_RAM 1103 ) ) 1104 { 1105 return(1); 1106 } 1107 1108 return 0; 1109 } 1110 1111 /***************************************************************************** 1112 1113 functionname: initEnvChannel 1114 description: initializes parameters 1115 returns: error status 1116 input: 1117 output: 1118 1119 *****************************************************************************/ 1120 static INT 1121 initEnvChannel ( HANDLE_SBR_CONFIG_DATA sbrConfigData, 1122 HANDLE_SBR_HEADER_DATA sbrHeaderData, 1123 HANDLE_ENV_CHANNEL hEnv, 1124 sbrConfigurationPtr params, 1125 ULONG statesInitFlag 1126 ,INT chanInEl 1127 ,UCHAR* dynamic_RAM 1128 ) 1129 { 1130 int frameShift, tran_off=0; 1131 INT e; 1132 INT tran_fc; 1133 INT timeSlots, timeStep, startIndex; 1134 INT noiseBands[2] = { 3, 3 }; 1135 1136 e = 1 << params->e; 1137 1138 FDK_ASSERT(params->e >= 0); 1139 1140 hEnv->encEnvData.freq_res_fixfix = 1; 1141 hEnv->fLevelProtect = 0; 1142 1143 hEnv->encEnvData.ldGrid = (sbrConfigData->sbrSyntaxFlags & SBR_SYNTAX_LOW_DELAY) ? 1 : 0; 1144 1145 hEnv->encEnvData.sbr_xpos_mode = (XPOS_MODE)params->sbr_xpos_mode; 1146 1147 if (hEnv->encEnvData.sbr_xpos_mode == XPOS_SWITCHED) { 1148 /* 1149 no other type than XPOS_MDCT or XPOS_SPEECH allowed, 1150 but enable switching 1151 */ 1152 sbrConfigData->switchTransposers = TRUE; 1153 hEnv->encEnvData.sbr_xpos_mode = XPOS_MDCT; 1154 } 1155 else { 1156 sbrConfigData->switchTransposers = FALSE; 1157 } 1158 1159 hEnv->encEnvData.sbr_xpos_ctrl = params->sbr_xpos_ctrl; 1160 1161 1162 /* extended data */ 1163 if(params->parametricCoding) { 1164 hEnv->encEnvData.extended_data = 1; 1165 } 1166 else { 1167 hEnv->encEnvData.extended_data = 0; 1168 } 1169 1170 hEnv->encEnvData.extension_size = 0; 1171 1172 startIndex = QMF_FILTER_PROTOTYPE_SIZE - sbrConfigData->noQmfBands; 1173 1174 switch (params->sbrFrameSize) { 1175 case 2304: 1176 timeSlots = 18; 1177 break; 1178 case 2048: 1179 case 1024: 1180 timeSlots = 16; 1181 break; 1182 case 1920: 1183 case 960: 1184 timeSlots = 15; 1185 break; 1186 case 1152: 1187 timeSlots = 9; 1188 break; 1189 default: 1190 return (1); /* Illegal frame size */ 1191 } 1192 1193 timeStep = sbrConfigData->noQmfSlots / timeSlots; 1194 1195 if ( FDKsbrEnc_InitTonCorrParamExtr(params->sbrFrameSize, 1196 &hEnv->TonCorr, 1197 sbrConfigData, 1198 timeSlots, 1199 params->sbr_xpos_ctrl, 1200 params->ana_max_level, 1201 sbrHeaderData->sbr_noise_bands, 1202 params->noiseFloorOffset, 1203 params->useSpeechConfig) ) 1204 return(1); 1205 1206 hEnv->encEnvData.noOfnoisebands = hEnv->TonCorr.sbrNoiseFloorEstimate.noNoiseBands; 1207 1208 noiseBands[0] = hEnv->encEnvData.noOfnoisebands; 1209 noiseBands[1] = hEnv->encEnvData.noOfnoisebands; 1210 1211 hEnv->encEnvData.sbr_invf_mode = (INVF_MODE)params->sbr_invf_mode; 1212 1213 if (hEnv->encEnvData.sbr_invf_mode == INVF_SWITCHED) { 1214 hEnv->encEnvData.sbr_invf_mode = INVF_MID_LEVEL; 1215 hEnv->TonCorr.switchInverseFilt = TRUE; 1216 } 1217 else { 1218 hEnv->TonCorr.switchInverseFilt = FALSE; 1219 } 1220 1221 1222 tran_fc = params->tran_fc; 1223 1224 if (tran_fc == 0) 1225 tran_fc = fixMin (5000, FDKsbrEnc_getSbrStartFreqRAW (sbrHeaderData->sbr_start_frequency,64,sbrConfigData->sampleFreq)); 1226 1227 1228 tran_fc = (tran_fc*4*sbrConfigData->noQmfBands/sbrConfigData->sampleFreq + 1)>>1; 1229 1230 if (sbrConfigData->sbrSyntaxFlags & SBR_SYNTAX_LOW_DELAY) { 1231 frameShift = LD_PRETRAN_OFF; 1232 tran_off = LD_PRETRAN_OFF + FRAME_MIDDLE_SLOT_512LD*timeStep; 1233 } else 1234 { 1235 frameShift = 0; 1236 switch (params->sbrFrameSize) { 1237 /* The factor of 2 is by definition. */ 1238 case 2048: tran_off = 8 + FRAME_MIDDLE_SLOT_2048 * timeStep; break; 1239 case 1920: tran_off = 7 + FRAME_MIDDLE_SLOT_1920 * timeStep; break; 1240 default: return 1; break; 1241 } 1242 } 1243 if ( FDKsbrEnc_InitExtractSbrEnvelope (&hEnv->sbrExtractEnvelope, 1244 sbrConfigData->noQmfSlots, 1245 sbrConfigData->noQmfBands, startIndex, 1246 timeSlots, timeStep, tran_off, 1247 statesInitFlag 1248 ,chanInEl 1249 ,dynamic_RAM 1250 ,sbrConfigData->sbrSyntaxFlags 1251 ) ) 1252 return(1); 1253 1254 if(FDKsbrEnc_InitSbrCodeEnvelope (&hEnv->sbrCodeEnvelope, 1255 sbrConfigData->nSfb, 1256 params->deltaTAcrossFrames, 1257 params->dF_edge_1stEnv, 1258 params->dF_edge_incr)) 1259 return(1); 1260 1261 if(FDKsbrEnc_InitSbrCodeEnvelope (&hEnv->sbrCodeNoiseFloor, 1262 noiseBands, 1263 params->deltaTAcrossFrames, 1264 0,0)) 1265 return(1); 1266 1267 sbrConfigData->initAmpResFF = params->init_amp_res_FF; 1268 1269 if(FDKsbrEnc_InitSbrHuffmanTables (&hEnv->encEnvData, 1270 &hEnv->sbrCodeEnvelope, 1271 &hEnv->sbrCodeNoiseFloor, 1272 sbrHeaderData->sbr_amp_res)) 1273 return(1); 1274 1275 FDKsbrEnc_initFrameInfoGenerator (&hEnv->SbrEnvFrame, 1276 params->spread, 1277 e, 1278 params->stat, 1279 timeSlots, 1280 hEnv->encEnvData.freq_res_fixfix 1281 ,hEnv->encEnvData.ldGrid 1282 ); 1283 1284 if(FDKsbrEnc_InitSbrTransientDetector (&hEnv->sbrTransientDetector, 1285 sbrConfigData->frameSize, 1286 sbrConfigData->sampleFreq, 1287 params, 1288 tran_fc, 1289 sbrConfigData->noQmfSlots, 1290 sbrConfigData->noQmfBands, 1291 hEnv->sbrExtractEnvelope.YBufferWriteOffset, 1292 hEnv->sbrExtractEnvelope.YBufferSzShift, 1293 frameShift, 1294 tran_off 1295 )) 1296 return(1); 1297 1298 1299 sbrConfigData->xposCtrlSwitch = params->sbr_xpos_ctrl; 1300 1301 hEnv->encEnvData.noHarmonics = sbrConfigData->nSfb[HI]; 1302 hEnv->encEnvData.addHarmonicFlag = 0; 1303 1304 return (0); 1305 } 1306 1307 INT sbrEncoder_Open( 1308 HANDLE_SBR_ENCODER *phSbrEncoder, 1309 INT nElements, 1310 INT nChannels, 1311 INT supportPS 1312 ) 1313 { 1314 INT i; 1315 INT errorStatus = 1; 1316 HANDLE_SBR_ENCODER hSbrEncoder = NULL; 1317 1318 if (phSbrEncoder==NULL 1319 ) 1320 { 1321 goto bail; 1322 } 1323 1324 hSbrEncoder = GetRam_SbrEncoder(); 1325 if (hSbrEncoder==NULL) { 1326 goto bail; 1327 } 1328 FDKmemclear(hSbrEncoder, sizeof(SBR_ENCODER)); 1329 1330 hSbrEncoder->pSBRdynamic_RAM = (UCHAR*)GetRam_SbrDynamic_RAM(); 1331 hSbrEncoder->dynamicRam = hSbrEncoder->pSBRdynamic_RAM; 1332 1333 1334 for (i=0; i<nElements; i++) { 1335 hSbrEncoder->sbrElement[i] = GetRam_SbrElement(i); 1336 if (hSbrEncoder->sbrElement[i]==NULL) { 1337 goto bail; 1338 } 1339 FDKmemclear(hSbrEncoder->sbrElement[i], sizeof(SBR_ELEMENT)); 1340 hSbrEncoder->sbrElement[i]->sbrConfigData.freqBandTable[LO] = GetRam_Sbr_freqBandTableLO(i); 1341 hSbrEncoder->sbrElement[i]->sbrConfigData.freqBandTable[HI] = GetRam_Sbr_freqBandTableHI(i); 1342 hSbrEncoder->sbrElement[i]->sbrConfigData.v_k_master = GetRam_Sbr_v_k_master(i); 1343 if ( (hSbrEncoder->sbrElement[i]->sbrConfigData.freqBandTable[LO]==NULL) || 1344 (hSbrEncoder->sbrElement[i]->sbrConfigData.freqBandTable[HI]==NULL) || 1345 (hSbrEncoder->sbrElement[i]->sbrConfigData.v_k_master==NULL) ) 1346 { 1347 goto bail; 1348 } 1349 } 1350 1351 for (i=0; i<nChannels; i++) { 1352 hSbrEncoder->pSbrChannel[i] = GetRam_SbrChannel(i); 1353 if (hSbrEncoder->pSbrChannel[i]==NULL) { 1354 goto bail; 1355 } 1356 1357 if ( createEnvChannel(&hSbrEncoder->pSbrChannel[i]->hEnvChannel, 1358 i 1359 ,hSbrEncoder->dynamicRam 1360 ) ) 1361 { 1362 goto bail; 1363 } 1364 1365 } 1366 1367 for (i=0; i<fixMax(nChannels,(supportPS)?2:0); i++) { 1368 hSbrEncoder->QmfAnalysis[i].FilterStates = GetRam_Sbr_QmfStatesAnalysis(i); 1369 if (hSbrEncoder->QmfAnalysis[i].FilterStates==NULL) { 1370 goto bail; 1371 } 1372 } 1373 1374 if (supportPS) { 1375 if (PSEnc_Create(&hSbrEncoder->hParametricStereo)) 1376 { 1377 goto bail; 1378 } 1379 1380 hSbrEncoder->qmfSynthesisPS.FilterStates = GetRam_PsQmfStatesSynthesis(); 1381 if (hSbrEncoder->qmfSynthesisPS.FilterStates==NULL) { 1382 goto bail; 1383 } 1384 } /* supportPS */ 1385 1386 *phSbrEncoder = hSbrEncoder; 1387 1388 errorStatus = 0; 1389 return errorStatus; 1390 1391 bail: 1392 /* Close SBR encoder instance */ 1393 sbrEncoder_Close(&hSbrEncoder); 1394 return errorStatus; 1395 } 1396 1397 static 1398 INT FDKsbrEnc_Reallocate( 1399 HANDLE_SBR_ENCODER hSbrEncoder, 1400 SBR_ELEMENT_INFO elInfo[(6)], 1401 const INT noElements) 1402 { 1403 INT totalCh = 0; 1404 INT totalQmf = 0; 1405 INT coreEl; 1406 INT el=-1; 1407 1408 hSbrEncoder->lfeChIdx = -1; /* default value, until lfe found */ 1409 1410 for (coreEl=0; coreEl<noElements; coreEl++) 1411 { 1412 /* SBR only handles SCE and CPE's */ 1413 if (elInfo[coreEl].elType == ID_SCE || elInfo[coreEl].elType == ID_CPE) { 1414 el++; 1415 } else { 1416 if (elInfo[coreEl].elType == ID_LFE) { 1417 hSbrEncoder->lfeChIdx = elInfo[coreEl].ChannelIndex[0]; 1418 } 1419 continue; 1420 } 1421 1422 SBR_ELEMENT_INFO *pelInfo = &elInfo[coreEl]; 1423 HANDLE_SBR_ELEMENT hSbrElement = hSbrEncoder->sbrElement[el]; 1424 1425 int ch; 1426 for ( ch = 0; ch < pelInfo->nChannelsInEl; ch++ ) { 1427 hSbrElement->sbrChannel[ch] = hSbrEncoder->pSbrChannel[totalCh]; 1428 totalCh++; 1429 } 1430 /* analysis QMF */ 1431 for ( ch = 0; ch < ((pelInfo->fParametricStereo)?2:pelInfo->nChannelsInEl); ch++ ) { 1432 hSbrElement->elInfo.ChannelIndex[ch] = pelInfo->ChannelIndex[ch]; 1433 hSbrElement->hQmfAnalysis[ch] = &hSbrEncoder->QmfAnalysis[totalQmf++]; 1434 } 1435 1436 /* Copy Element info */ 1437 hSbrElement->elInfo.elType = pelInfo->elType; 1438 hSbrElement->elInfo.instanceTag = pelInfo->instanceTag; 1439 hSbrElement->elInfo.nChannelsInEl = pelInfo->nChannelsInEl; 1440 hSbrElement->elInfo.fParametricStereo = pelInfo->fParametricStereo; 1441 } /* coreEl */ 1442 1443 return 0; 1444 } 1445 1446 1447 1448 /***************************************************************************** 1449 1450 functionname: FDKsbrEnc_EnvInit 1451 description: initializes parameters 1452 returns: error status 1453 input: 1454 output: hEnv 1455 1456 *****************************************************************************/ 1457 static 1458 INT FDKsbrEnc_EnvInit ( 1459 HANDLE_SBR_ELEMENT hSbrElement, 1460 sbrConfigurationPtr params, 1461 INT *coreBandWith, 1462 AUDIO_OBJECT_TYPE aot, 1463 int nBitstrDelay, 1464 int nElement, 1465 ULONG statesInitFlag 1466 ,UCHAR *dynamic_RAM 1467 ) 1468 { 1469 UCHAR *bitstreamBuffer; 1470 int ch, i; 1471 1472 if ((params->codecSettings.nChannels < 1) || (params->codecSettings.nChannels > MAX_NUM_CHANNELS)){ 1473 return(1); 1474 } 1475 1476 /* initialize the encoder handle and structs*/ 1477 bitstreamBuffer = hSbrElement->payloadDelayLine[nBitstrDelay]; 1478 1479 /* init and set syntax flags */ 1480 hSbrElement->sbrConfigData.sbrSyntaxFlags = 0; 1481 1482 switch (aot) { 1483 case AOT_DRM_MPEG_PS: 1484 case AOT_DRM_SBR: 1485 hSbrElement->sbrConfigData.sbrSyntaxFlags |= SBR_SYNTAX_SCALABLE; 1486 hSbrElement->sbrConfigData.sbrSyntaxFlags |= SBR_SYNTAX_DRM_CRC; 1487 hSbrElement->sbrConfigData.sbrSyntaxFlags |= SBR_SYNTAX_CRC; 1488 break; 1489 case AOT_ER_AAC_ELD: 1490 hSbrElement->sbrConfigData.sbrSyntaxFlags |= SBR_SYNTAX_LOW_DELAY; 1491 break; 1492 default: 1493 break; 1494 } 1495 if (params->crcSbr) { 1496 hSbrElement->sbrConfigData.sbrSyntaxFlags |= SBR_SYNTAX_CRC; 1497 } 1498 1499 hSbrElement->sbrConfigData.noQmfBands = QMF_CHANNELS; 1500 hSbrElement->sbrConfigData.noQmfSlots = params->sbrFrameSize/hSbrElement->sbrConfigData.noQmfBands; 1501 1502 FDKinitBitStream(&hSbrElement->CmonData.sbrBitbuf, bitstreamBuffer, MAX_PAYLOAD_SIZE*sizeof(UCHAR), 0, BS_WRITER); 1503 1504 /* 1505 now initialize sbrConfigData, sbrHeaderData and sbrBitstreamData, 1506 */ 1507 hSbrElement->sbrConfigData.nChannels = params->codecSettings.nChannels; 1508 1509 if(params->codecSettings.nChannels == 2) 1510 hSbrElement->sbrConfigData.stereoMode = params->stereoMode; 1511 else 1512 hSbrElement->sbrConfigData.stereoMode = SBR_MONO; 1513 1514 hSbrElement->sbrConfigData.frameSize = params->sbrFrameSize; 1515 1516 /* implicit rule for sampleRateMode */ 1517 /* run in "multirate" mode where sbr fs is 2 * codec fs */ 1518 hSbrElement->sbrHeaderData.sampleRateMode = DUAL_RATE; 1519 hSbrElement->sbrConfigData.sampleFreq = 2 * params->codecSettings.sampleFreq; 1520 1521 hSbrElement->sbrBitstreamData.CountSendHeaderData = 0; 1522 if (params->SendHeaderDataTime > 0 ) { 1523 1524 hSbrElement->sbrBitstreamData.NrSendHeaderData = (INT)(params->SendHeaderDataTime * hSbrElement->sbrConfigData.sampleFreq 1525 / (1000 * hSbrElement->sbrConfigData.frameSize)); 1526 hSbrElement->sbrBitstreamData.NrSendHeaderData = fixMax(hSbrElement->sbrBitstreamData.NrSendHeaderData,1); 1527 } 1528 else { 1529 hSbrElement->sbrBitstreamData.NrSendHeaderData = 0; 1530 } 1531 1532 hSbrElement->sbrHeaderData.sbr_data_extra = params->sbr_data_extra; 1533 hSbrElement->sbrBitstreamData.HeaderActive = 0; 1534 hSbrElement->sbrHeaderData.sbr_start_frequency = params->startFreq; 1535 hSbrElement->sbrHeaderData.sbr_stop_frequency = params->stopFreq; 1536 hSbrElement->sbrHeaderData.sbr_xover_band = 0; 1537 hSbrElement->sbrHeaderData.sbr_lc_stereo_mode = 0; 1538 1539 /* data_extra */ 1540 if (params->sbr_xpos_ctrl!= SBR_XPOS_CTRL_DEFAULT) 1541 hSbrElement->sbrHeaderData.sbr_data_extra = 1; 1542 1543 hSbrElement->sbrHeaderData.sbr_amp_res = (AMP_RES)params->amp_res; 1544 1545 /* header_extra_1 */ 1546 hSbrElement->sbrHeaderData.freqScale = params->freqScale; 1547 hSbrElement->sbrHeaderData.alterScale = params->alterScale; 1548 hSbrElement->sbrHeaderData.sbr_noise_bands = params->sbr_noise_bands; 1549 hSbrElement->sbrHeaderData.header_extra_1 = 0; 1550 1551 if ((params->freqScale != SBR_FREQ_SCALE_DEFAULT) || 1552 (params->alterScale != SBR_ALTER_SCALE_DEFAULT) || 1553 (params->sbr_noise_bands != SBR_NOISE_BANDS_DEFAULT)) 1554 { 1555 hSbrElement->sbrHeaderData.header_extra_1 = 1; 1556 } 1557 1558 /* header_extra_2 */ 1559 hSbrElement->sbrHeaderData.sbr_limiter_bands = params->sbr_limiter_bands; 1560 hSbrElement->sbrHeaderData.sbr_limiter_gains = params->sbr_limiter_gains; 1561 1562 if ((hSbrElement->sbrConfigData.sampleFreq > 48000) && 1563 (hSbrElement->sbrHeaderData.sbr_start_frequency >= 9)) 1564 { 1565 hSbrElement->sbrHeaderData.sbr_limiter_gains = SBR_LIMITER_GAINS_INFINITE; 1566 } 1567 1568 hSbrElement->sbrHeaderData.sbr_interpol_freq = params->sbr_interpol_freq; 1569 hSbrElement->sbrHeaderData.sbr_smoothing_length = params->sbr_smoothing_length; 1570 hSbrElement->sbrHeaderData.header_extra_2 = 0; 1571 1572 if ((params->sbr_limiter_bands != SBR_LIMITER_BANDS_DEFAULT) || 1573 (params->sbr_limiter_gains != SBR_LIMITER_GAINS_DEFAULT) || 1574 (params->sbr_interpol_freq != SBR_INTERPOL_FREQ_DEFAULT) || 1575 (params->sbr_smoothing_length != SBR_SMOOTHING_LENGTH_DEFAULT)) 1576 { 1577 hSbrElement->sbrHeaderData.header_extra_2 = 1; 1578 } 1579 1580 /* other switches */ 1581 hSbrElement->sbrConfigData.useWaveCoding = params->useWaveCoding; 1582 hSbrElement->sbrConfigData.useParametricCoding = params->parametricCoding; 1583 1584 /* init freq band table */ 1585 if(updateFreqBandTable(&hSbrElement->sbrConfigData, 1586 &hSbrElement->sbrHeaderData, 1587 hSbrElement->sbrConfigData.noQmfBands)) 1588 { 1589 return(1); 1590 } 1591 1592 /* now create envelope ext and QMF for each available channel */ 1593 for ( ch = 0; ch < hSbrElement->sbrConfigData.nChannels; ch++ ) { 1594 1595 if ( initEnvChannel(&hSbrElement->sbrConfigData, 1596 &hSbrElement->sbrHeaderData, 1597 &hSbrElement->sbrChannel[ch]->hEnvChannel, 1598 params, 1599 statesInitFlag 1600 ,ch 1601 ,dynamic_RAM 1602 ) ) 1603 { 1604 return(1); 1605 } 1606 1607 1608 } /* nChannels */ 1609 1610 /* reset and intialize analysis qmf */ 1611 for ( ch = 0; ch < ((hSbrElement->elInfo.fParametricStereo)?2:hSbrElement->sbrConfigData.nChannels); ch++ ) 1612 { 1613 int err; 1614 UINT qmfFlags = (hSbrElement->sbrConfigData.sbrSyntaxFlags & SBR_SYNTAX_LOW_DELAY) ? QMF_FLAG_CLDFB : 0; 1615 if (statesInitFlag) 1616 qmfFlags &= ~QMF_FLAG_KEEP_STATES; 1617 else 1618 qmfFlags |= QMF_FLAG_KEEP_STATES; 1619 1620 err = qmfInitAnalysisFilterBank( hSbrElement->hQmfAnalysis[ch], 1621 (FIXP_QAS*)hSbrElement->hQmfAnalysis[ch]->FilterStates, 1622 hSbrElement->sbrConfigData.noQmfSlots, 1623 hSbrElement->sbrConfigData.noQmfBands, 1624 hSbrElement->sbrConfigData.noQmfBands, 1625 hSbrElement->sbrConfigData.noQmfBands, 1626 qmfFlags ); 1627 } 1628 1629 /* */ 1630 hSbrElement->CmonData.xOverFreq = hSbrElement->sbrConfigData.xOverFreq; 1631 hSbrElement->CmonData.dynBwEnabled = (params->dynBwSupported && params->dynBwEnabled); 1632 hSbrElement->CmonData.dynXOverFreqEnc = FDKsbrEnc_SbrGetXOverFreq( hSbrElement, hSbrElement->CmonData.xOverFreq); 1633 for ( i = 0; i < 5; i++ ) 1634 hSbrElement->dynXOverFreqDelay[i] = hSbrElement->CmonData.dynXOverFreqEnc; 1635 hSbrElement->CmonData.sbrNumChannels = hSbrElement->sbrConfigData.nChannels; 1636 hSbrElement->sbrConfigData.dynXOverFreq = hSbrElement->CmonData.xOverFreq; 1637 1638 /* Update Bandwith to be passed to the core encoder */ 1639 *coreBandWith = hSbrElement->CmonData.xOverFreq; 1640 1641 return(0); 1642 } 1643 1644 INT sbrEncoder_GetInBufferSize(int noChannels) 1645 { 1646 INT temp; 1647 1648 temp = (1024*DOWN_SMPL_FAC); 1649 temp += 1024 + MAX_SAMPLE_DELAY; 1650 temp *= noChannels; 1651 temp *= sizeof(INT_PCM); 1652 return temp; 1653 } 1654 1655 /* 1656 * Encode Dummy SBR payload frames to fill the delay lines. 1657 */ 1658 static 1659 INT FDKsbrEnc_DelayCompensation ( 1660 HANDLE_SBR_ENCODER hEnvEnc, 1661 INT_PCM *timeBuffer 1662 ) 1663 { 1664 int n, el; 1665 1666 for (n=hEnvEnc->nBitstrDelay; n>0; n--) 1667 { 1668 for (el=0; el<hEnvEnc->noElements; el++) 1669 { 1670 if (FDKsbrEnc_EnvEncodeFrame( 1671 hEnvEnc, 1672 el, 1673 timeBuffer + hEnvEnc->downsampledOffset, 1674 hEnvEnc->sbrElement[el]->sbrConfigData.nChannels, 1675 NULL, 1676 NULL, 1677 1 1678 )) 1679 return -1; 1680 sbrEncoder_UpdateBuffers(hEnvEnc, timeBuffer); 1681 } 1682 } 1683 return 0; 1684 } 1685 1686 UINT sbrEncoder_LimitBitRate(UINT bitRate, UINT numChannels, UINT coreSampleRate, AUDIO_OBJECT_TYPE aot) 1687 { 1688 UINT newBitRate; 1689 INT index; 1690 1691 FDK_ASSERT(numChannels > 0 && numChannels <= 2); 1692 if (aot == AOT_PS) { 1693 if (numChannels == 2) { 1694 index = getPsTuningTableIndex(bitRate, &newBitRate); 1695 if (index == INVALID_TABLE_IDX) { 1696 bitRate = newBitRate; 1697 } 1698 /* Set numChannels to 1 because for PS we need a SBR SCE (mono) element. */ 1699 numChannels = 1; 1700 } else { 1701 return 0; 1702 } 1703 } 1704 index = getSbrTuningTableIndex(bitRate, numChannels, coreSampleRate, aot, &newBitRate); 1705 if (index != INVALID_TABLE_IDX) { 1706 newBitRate = bitRate; 1707 } 1708 1709 return newBitRate; 1710 } 1711 1712 1713 INT sbrEncoder_Init( 1714 HANDLE_SBR_ENCODER hSbrEncoder, 1715 SBR_ELEMENT_INFO elInfo[(6)], 1716 int noElements, 1717 INT_PCM *inputBuffer, 1718 INT *coreBandwidth, 1719 INT *inputBufferOffset, 1720 INT *numChannels, 1721 INT *sampleRate, 1722 INT *frameLength, 1723 AUDIO_OBJECT_TYPE *aot, 1724 int *delay, 1725 int transformFactor, 1726 ULONG statesInitFlag 1727 ) 1728 { 1729 HANDLE_ERROR_INFO errorInfo = noError; 1730 sbrConfiguration sbrConfig[(6)]; 1731 INT error = 0; 1732 INT lowestBandwidth; 1733 /* Save input parameters */ 1734 INT inputSampleRate = *sampleRate; 1735 int coreFrameLength = *frameLength; 1736 int inputBandWidth = *coreBandwidth; 1737 int inputChannels = *numChannels; 1738 1739 int downsampledOffset = 0; 1740 int sbrOffset = 0; 1741 int downsamplerDelay = 0; 1742 int downsample = 0; 1743 int nBitstrDelay = 0; 1744 int lowestSbrStartFreq, lowestSbrStopFreq; 1745 int lowDelay = 0; 1746 int usePs = 0; 1747 1748 /* check whether SBR setting is available for the current encoder configuration (bitrate, samplerate) */ 1749 if ( (*aot==AOT_PS) || (*aot==AOT_MP2_PS) || (*aot==AOT_DABPLUS_PS) || (*aot==AOT_DRM_MPEG_PS) ) { 1750 usePs = 1; 1751 } 1752 if ( (*aot==AOT_ER_AAC_ELD) ) { 1753 lowDelay = 1; 1754 } 1755 else if ( (*aot==AOT_ER_AAC_LD) ) { 1756 error = 1; 1757 goto bail; 1758 } 1759 1760 /* Parametric Stereo */ 1761 if ( usePs ) { 1762 if ( *numChannels == 2 && noElements == 1) { 1763 /* Override Element type in case of Parametric stereo */ 1764 elInfo[0].elType = ID_SCE; 1765 elInfo[0].fParametricStereo = 1; 1766 elInfo[0].nChannelsInEl = 1; 1767 /* core encoder gets downmixed mono signal */ 1768 *numChannels = 1; 1769 } else { 1770 switch (*aot) { 1771 case AOT_MP2_PS: 1772 *aot = AOT_MP2_SBR; 1773 break; 1774 case AOT_DABPLUS_PS: 1775 *aot = AOT_DABPLUS_SBR; 1776 break; 1777 case AOT_DRM_MPEG_PS: 1778 *aot = AOT_DRM_SBR; 1779 break; 1780 case AOT_PS: 1781 default: 1782 *aot = AOT_SBR; 1783 } 1784 usePs = 0; 1785 } 1786 } /* usePs */ 1787 1788 /* check whether SBR setting is available for the current encoder configuration (bitrate, samplerate) */ 1789 { 1790 int delayDiff = 0; 1791 int el, coreEl; 1792 1793 /* Check if every element config is feasible */ 1794 for (coreEl=0; coreEl<noElements; coreEl++) 1795 { 1796 /* SBR only handles SCE and CPE's */ 1797 if (elInfo[coreEl].elType != ID_SCE && elInfo[coreEl].elType != ID_CPE) { 1798 continue; 1799 } 1800 /* check if desired configuration is available */ 1801 if ( !FDKsbrEnc_IsSbrSettingAvail (elInfo[coreEl].bitRate, 0, elInfo[coreEl].nChannelsInEl, inputSampleRate, *aot) ) 1802 { 1803 /* otherwise - change to AAC-LC */ 1804 switch (*aot) { 1805 case AOT_MP2_SBR: 1806 case AOT_MP2_PS: 1807 *aot = AOT_MP2_AAC_LC; 1808 break; 1809 case AOT_DABPLUS_SBR: 1810 case AOT_DABPLUS_PS: 1811 *aot = AOT_DABPLUS_AAC_LC; 1812 break; 1813 case AOT_DRM_SBR: 1814 case AOT_DRM_MPEG_PS: 1815 *aot = AOT_DRM_AAC; 1816 break; 1817 case AOT_ER_AAC_ELD: 1818 break; 1819 case AOT_SBR: 1820 case AOT_PS: 1821 default: 1822 *aot = AOT_AAC_LC; 1823 } 1824 error = 1; 1825 goto bail; 1826 } 1827 } 1828 1829 *sampleRate /= DOWN_SMPL_FAC; 1830 1831 /* Determine Delay balancing and new encoder delay */ 1832 if (lowDelay) { 1833 downsample = 1; /* activate downsampler */ 1834 delayDiff = (*delay*DOWN_SMPL_FAC) + DELAY_ELD2SBR(coreFrameLength); 1835 *delay = DELAY_ELDSBR(coreFrameLength); 1836 } 1837 else if (usePs) { 1838 delayDiff = (*delay*DOWN_SMPL_FAC) + DELAY_AAC2PS(coreFrameLength); 1839 *delay = DELAY_PS(coreFrameLength); 1840 } 1841 else { 1842 downsample = 1; /* activate downsampler */ 1843 delayDiff = (*delay*DOWN_SMPL_FAC) + DELAY_AAC2SBR(coreFrameLength); 1844 *delay = DELAY_SBR(coreFrameLength); 1845 } 1846 1847 /* Take care about downsampled data bound to the SBR path */ 1848 if (!downsample && delayDiff > 0) { 1849 /* 1850 * We must tweak the balancing into a situation where the downsampled path 1851 * is the one to be delayed, because delaying the QMF domain input, also delays 1852 * the downsampled audio, counteracting to the purpose of delay balancing. 1853 */ 1854 while ( delayDiff > 0 ) 1855 { 1856 /* Encoder delay increases */ 1857 *delay += coreFrameLength*DOWN_SMPL_FAC; 1858 /* Add one frame delay to SBR path */ 1859 delayDiff -= coreFrameLength*DOWN_SMPL_FAC; 1860 nBitstrDelay += 1; 1861 } 1862 } else { 1863 *delay += fixp_abs(delayDiff); 1864 } 1865 1866 if (delayDiff < 0) { 1867 /* Delay AAC data */ 1868 delayDiff = -delayDiff; 1869 /* Multiply downsampled offset by AAC core channels. Divide by 2 because of half samplerate of downsampled data. */ 1870 downsampledOffset = (delayDiff*(*numChannels))/DOWN_SMPL_FAC; 1871 sbrOffset = 0; 1872 } else { 1873 /* Delay SBR input */ 1874 if ( delayDiff > (int)coreFrameLength*DOWN_SMPL_FAC ) 1875 { 1876 /* Do bitstream frame-wise delay balancing if we have more than SBR framelength samples delay difference */ 1877 delayDiff -= coreFrameLength*DOWN_SMPL_FAC; 1878 nBitstrDelay = 1; 1879 } 1880 /* Multiply input offset by input channels */ 1881 sbrOffset = delayDiff*(*numChannels); 1882 downsampledOffset = 0; 1883 } 1884 1885 hSbrEncoder->nBitstrDelay = nBitstrDelay; 1886 hSbrEncoder->nChannels = *numChannels; 1887 hSbrEncoder->frameSize = *frameLength*DOWN_SMPL_FAC; 1888 hSbrEncoder->fTimeDomainDownsampling = downsample; 1889 hSbrEncoder->estimateBitrate = 0; 1890 hSbrEncoder->inputDataDelay = 0; 1891 1892 1893 /* Open SBR elements */ 1894 el = -1; 1895 lowestSbrStartFreq = lowestSbrStopFreq = 9999; 1896 lowestBandwidth = 99999; 1897 1898 /* Loop through each core encoder element and get a matching SBR element config */ 1899 for (coreEl=0; coreEl<noElements; coreEl++) 1900 { 1901 /* SBR only handles SCE and CPE's */ 1902 if (elInfo[coreEl].elType == ID_SCE || elInfo[coreEl].elType == ID_CPE) { 1903 el++; 1904 } else { 1905 continue; 1906 } 1907 1908 /* Set parametric Stereo Flag. */ 1909 if (usePs) { 1910 elInfo[coreEl].fParametricStereo = 1; 1911 } else { 1912 elInfo[coreEl].fParametricStereo = 0; 1913 } 1914 1915 /* 1916 * Init sbrConfig structure 1917 */ 1918 FDKsbrEnc_InitializeSbrDefaults ( &sbrConfig[el], 1919 DOWN_SMPL_FAC, 1920 coreFrameLength); 1921 /* 1922 * Modify sbrConfig structure according to Element parameters 1923 */ 1924 FDKsbrEnc_AdjustSbrSettings ( &sbrConfig[el], 1925 elInfo[coreEl].bitRate, 1926 elInfo[coreEl].nChannelsInEl, 1927 *sampleRate, 1928 transformFactor, 1929 24000, 1930 0, 1931 0, /* useSpeechConfig */ 1932 0, /* lcsMode */ 1933 usePs, /* bParametricStereo */ 1934 *aot); 1935 1936 /* Find common frequency border for all SBR elements */ 1937 lowestSbrStartFreq = fixMin(lowestSbrStartFreq, sbrConfig[el].startFreq); 1938 lowestSbrStopFreq = fixMin(lowestSbrStopFreq, sbrConfig[el].stopFreq); 1939 1940 1941 } /* first element loop */ 1942 1943 /* Set element count (can be less than core encoder element count) */ 1944 hSbrEncoder->noElements = el+1; 1945 1946 FDKsbrEnc_Reallocate(hSbrEncoder, 1947 elInfo, 1948 noElements); 1949 1950 for (el=0; el<hSbrEncoder->noElements; el++) { 1951 1952 int bandwidth = *coreBandwidth; 1953 1954 /* Use lowest common bandwidth */ 1955 sbrConfig[el].startFreq = lowestSbrStartFreq; 1956 sbrConfig[el].stopFreq = lowestSbrStopFreq; 1957 1958 /* initialize SBR element, and get core bandwidth */ 1959 error = FDKsbrEnc_EnvInit(hSbrEncoder->sbrElement[el], 1960 &sbrConfig[el], 1961 &bandwidth, 1962 *aot, 1963 nBitstrDelay, 1964 el, 1965 statesInitFlag 1966 ,hSbrEncoder->dynamicRam 1967 ); 1968 1969 if (error != 0) { 1970 goto bail; 1971 } 1972 1973 /* Get lowest core encoder bandwidth to be returned later. */ 1974 lowestBandwidth = fixMin(lowestBandwidth, bandwidth); 1975 1976 } /* second element loop */ 1977 1978 /* Initialize a downsampler for each channel in each SBR element */ 1979 if (hSbrEncoder->fTimeDomainDownsampling) 1980 { 1981 for (el=0; el<hSbrEncoder->noElements; el++) 1982 { 1983 HANDLE_SBR_ELEMENT hSbrEl = hSbrEncoder->sbrElement[el]; 1984 INT Wc, ch; 1985 1986 /* Calculated required normalized cutoff frequency (Wc = 1.0 -> lowestBandwidth = inputSampleRate/2) */ 1987 Wc = (2*lowestBandwidth)*1000 / inputSampleRate; 1988 1989 for (ch=0; ch<hSbrEl->elInfo.nChannelsInEl; ch++) 1990 { 1991 FDKaacEnc_InitDownsampler (&hSbrEl->sbrChannel[ch]->downSampler, Wc, DOWN_SMPL_FAC); 1992 } 1993 1994 FDK_ASSERT (hSbrEl->sbrChannel[0]->downSampler.delay <=MAX_DS_FILTER_DELAY && hSbrEl->sbrChannel[0]->downSampler.delay <=MAX_DS_FILTER_DELAY); 1995 downsamplerDelay = hSbrEl->sbrChannel[0]->downSampler.delay; 1996 } /* third element loop */ 1997 1998 /* lfe */ 1999 FDKaacEnc_InitDownsampler (&hSbrEncoder->lfeDownSampler, 0, DOWN_SMPL_FAC); 2000 2001 /* Add the resampler additional delay to get the final delay and buffer offset values. */ 2002 if (sbrOffset > 0 || downsampledOffset <= ((downsamplerDelay * (*numChannels))/DOWN_SMPL_FAC)) { 2003 sbrOffset += (downsamplerDelay - downsampledOffset) * (*numChannels) ; 2004 *delay += downsamplerDelay - downsampledOffset; 2005 downsampledOffset = 0; 2006 } else { 2007 downsampledOffset -= (downsamplerDelay * (*numChannels))/DOWN_SMPL_FAC; 2008 sbrOffset = 0; 2009 } 2010 2011 hSbrEncoder->inputDataDelay = downsamplerDelay; 2012 } 2013 2014 2015 /* Assign core encoder Bandwidth */ 2016 *coreBandwidth = lowestBandwidth; 2017 2018 /* Estimate sbr bitrate, 2.5 kBit/s per sbr channel */ 2019 hSbrEncoder->estimateBitrate += 2500 * (*numChannels); 2020 2021 /* initialize parametric stereo */ 2022 if (usePs) 2023 { 2024 PSENC_CONFIG psEncConfig; 2025 FDK_ASSERT(hSbrEncoder->noElements == 1); 2026 INT psTuningTableIdx = getPsTuningTableIndex(elInfo[0].bitRate, NULL); 2027 2028 psEncConfig.frameSize = *frameLength; //sbrConfig.sbrFrameSize; 2029 psEncConfig.qmfFilterMode = 0; 2030 psEncConfig.sbrPsDelay = 0; 2031 2032 /* tuning parameters */ 2033 if (psTuningTableIdx != INVALID_TABLE_IDX) { 2034 psEncConfig.nStereoBands = psTuningTable[psTuningTableIdx].nStereoBands; 2035 psEncConfig.maxEnvelopes = psTuningTable[psTuningTableIdx].nEnvelopes; 2036 psEncConfig.iidQuantErrorThreshold = (FIXP_DBL)psTuningTable[psTuningTableIdx].iidQuantErrorThreshold; 2037 2038 /* calculation is not quite linear, increased number of envelopes causes more bits */ 2039 /* assume avg. 50 bits per frame for 10 stereo bands / 1 envelope configuration */ 2040 hSbrEncoder->estimateBitrate += ( (((*sampleRate) * 5 * psEncConfig.nStereoBands * psEncConfig.maxEnvelopes) / hSbrEncoder->frameSize)); 2041 2042 } else { 2043 error = ERROR(CDI, "Invalid ps tuning table index."); 2044 goto bail; 2045 } 2046 2047 qmfInitSynthesisFilterBank(&hSbrEncoder->qmfSynthesisPS, 2048 (FIXP_DBL*)hSbrEncoder->qmfSynthesisPS.FilterStates, 2049 hSbrEncoder->sbrElement[0]->sbrConfigData.noQmfSlots, 2050 hSbrEncoder->sbrElement[0]->sbrConfigData.noQmfBands>>1, 2051 hSbrEncoder->sbrElement[0]->sbrConfigData.noQmfBands>>1, 2052 hSbrEncoder->sbrElement[0]->sbrConfigData.noQmfBands>>1, 2053 (statesInitFlag) ? 0 : QMF_FLAG_KEEP_STATES); 2054 2055 if(errorInfo == noError){ 2056 /* update delay */ 2057 psEncConfig.sbrPsDelay = FDKsbrEnc_GetEnvEstDelay(&hSbrEncoder->sbrElement[0]->sbrChannel[0]->hEnvChannel.sbrExtractEnvelope); 2058 2059 if(noError != (errorInfo = PSEnc_Init( hSbrEncoder->hParametricStereo, 2060 &psEncConfig, 2061 hSbrEncoder->sbrElement[0]->sbrConfigData.noQmfSlots, 2062 hSbrEncoder->sbrElement[0]->sbrConfigData.noQmfBands 2063 ,hSbrEncoder->dynamicRam 2064 ))) 2065 { 2066 errorInfo = handBack(errorInfo); 2067 } 2068 } 2069 } 2070 2071 hSbrEncoder->downsampledOffset = downsampledOffset; 2072 hSbrEncoder->downmixSize = coreFrameLength*(*numChannels); 2073 hSbrEncoder->bufferOffset = sbrOffset; 2074 /* Delay Compensation: fill bitstream delay buffer with zero input signal */ 2075 if ( hSbrEncoder->nBitstrDelay > 0 ) 2076 { 2077 error = FDKsbrEnc_DelayCompensation (hSbrEncoder, inputBuffer); 2078 if (error != 0) 2079 goto bail; 2080 } 2081 2082 /* Set Output frame length */ 2083 *frameLength = coreFrameLength*DOWN_SMPL_FAC; 2084 /* Input buffer offset */ 2085 *inputBufferOffset = fixMax(sbrOffset, downsampledOffset); 2086 2087 2088 } 2089 2090 return error; 2091 2092 bail: 2093 /* Restore input settings */ 2094 *sampleRate = inputSampleRate; 2095 *frameLength = coreFrameLength; 2096 *numChannels = inputChannels; 2097 *coreBandwidth = inputBandWidth; 2098 2099 return error; 2100 } 2101 2102 2103 INT 2104 sbrEncoder_EncodeFrame( HANDLE_SBR_ENCODER hSbrEncoder, 2105 INT_PCM *samples, 2106 UINT timeInStride, 2107 UINT sbrDataBits[(6)], 2108 UCHAR sbrData[(6)][MAX_PAYLOAD_SIZE] 2109 ) 2110 { 2111 INT error; 2112 int el; 2113 2114 for (el=0; el<hSbrEncoder->noElements; el++) 2115 { 2116 if (hSbrEncoder->sbrElement[el] != NULL) 2117 { 2118 error = FDKsbrEnc_EnvEncodeFrame( 2119 hSbrEncoder, 2120 el, 2121 samples + hSbrEncoder->downsampledOffset, 2122 timeInStride, 2123 &sbrDataBits[el], 2124 sbrData[el], 2125 0 2126 ); 2127 if (error) 2128 return error; 2129 } 2130 } 2131 2132 if ( (hSbrEncoder->lfeChIdx!=-1) && (hSbrEncoder->fTimeDomainDownsampling) ) 2133 { 2134 INT nOutSamples; 2135 2136 FDKaacEnc_Downsample(&hSbrEncoder->lfeDownSampler, 2137 samples + hSbrEncoder->downsampledOffset + hSbrEncoder->bufferOffset + hSbrEncoder->lfeChIdx, 2138 hSbrEncoder->frameSize, 2139 timeInStride, 2140 samples + hSbrEncoder->downsampledOffset + hSbrEncoder->lfeChIdx, 2141 &nOutSamples, 2142 hSbrEncoder->nChannels); 2143 } /* lfe downsampler */ 2144 2145 return 0; 2146 } 2147 2148 2149 INT sbrEncoder_UpdateBuffers( 2150 HANDLE_SBR_ENCODER hSbrEncoder, 2151 INT_PCM *timeBuffer 2152 ) 2153 { 2154 if ( hSbrEncoder->downsampledOffset > 0 ) { 2155 /* Move delayed downsampled data */ 2156 FDKmemcpy ( timeBuffer, 2157 timeBuffer + hSbrEncoder->downmixSize, 2158 sizeof(INT_PCM) * (hSbrEncoder->downsampledOffset) ); 2159 } else { 2160 /* Move delayed input data */ 2161 FDKmemcpy ( timeBuffer, 2162 timeBuffer + hSbrEncoder->nChannels * hSbrEncoder->frameSize, 2163 sizeof(INT_PCM) * hSbrEncoder->bufferOffset ); 2164 } 2165 if ( hSbrEncoder->nBitstrDelay > 0 ) 2166 { 2167 int el; 2168 2169 for (el=0; el<hSbrEncoder->noElements; el++) 2170 { 2171 FDKmemmove ( hSbrEncoder->sbrElement[el]->payloadDelayLine[0], 2172 hSbrEncoder->sbrElement[el]->payloadDelayLine[1], 2173 sizeof(UCHAR) * (hSbrEncoder->nBitstrDelay*MAX_PAYLOAD_SIZE) ); 2174 2175 FDKmemmove( &hSbrEncoder->sbrElement[el]->payloadDelayLineSize[0], 2176 &hSbrEncoder->sbrElement[el]->payloadDelayLineSize[1], 2177 sizeof(UINT) * (hSbrEncoder->nBitstrDelay) ); 2178 } 2179 } 2180 return 0; 2181 } 2182 2183 2184 INT sbrEncoder_GetEstimateBitrate(HANDLE_SBR_ENCODER hSbrEncoder) 2185 { 2186 INT estimateBitrate = 0; 2187 2188 if(hSbrEncoder) { 2189 estimateBitrate += hSbrEncoder->estimateBitrate; 2190 } 2191 2192 return estimateBitrate; 2193 } 2194 2195 INT sbrEncoder_GetInputDataDelay(HANDLE_SBR_ENCODER hSbrEncoder) 2196 { 2197 INT delay = -1; 2198 2199 if(hSbrEncoder) { 2200 delay = hSbrEncoder->inputDataDelay; 2201 } 2202 return delay; 2203 } 2204 2205 2206 INT sbrEncoder_GetLibInfo( LIB_INFO *info ) 2207 { 2208 int i; 2209 2210 if (info == NULL) { 2211 return -1; 2212 } 2213 /* search for next free tab */ 2214 for (i = 0; i < FDK_MODULE_LAST; i++) { 2215 if (info[i].module_id == FDK_NONE) break; 2216 } 2217 if (i == FDK_MODULE_LAST) { 2218 return -1; 2219 } 2220 info += i; 2221 2222 info->module_id = FDK_SBRENC; 2223 info->version = LIB_VERSION(SBRENCODER_LIB_VL0, SBRENCODER_LIB_VL1, SBRENCODER_LIB_VL2); 2224 LIB_VERSION_STRING(info); 2225 info->build_date = __DATE__; 2226 info->build_time = __TIME__; 2227 info->title = "SBR Encoder"; 2228 2229 /* Set flags */ 2230 info->flags = 0 2231 | CAPF_SBR_HQ 2232 | CAPF_SBR_PS_MPEG 2233 ; 2234 /* End of flags */ 2235 2236 return 0; 2237 } 2238
