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 AAC Encoder lib ****************** 85 86 Author(s): V. Bacigalupo 87 Description: Metadata Encoder library interface functions 88 89 ******************************************************************************/ 90 91 92 #include "metadata_main.h" 93 #include "metadata_compressor.h" 94 #include "FDK_bitstream.h" 95 #include "FDK_audio.h" 96 #include "genericStds.h" 97 98 /*----------------- defines ----------------------*/ 99 #define MAX_DRC_BANDS (1<<4) 100 #define MAX_DRC_CHANNELS (8) 101 #define MAX_DRC_FRAMELEN (2*1024) 102 103 /*--------------- structure definitions --------------------*/ 104 105 typedef struct AAC_METADATA 106 { 107 /* MPEG: Dynamic Range Control */ 108 struct { 109 UCHAR prog_ref_level_present; 110 SCHAR prog_ref_level; 111 112 UCHAR dyn_rng_sgn[MAX_DRC_BANDS]; 113 UCHAR dyn_rng_ctl[MAX_DRC_BANDS]; 114 115 UCHAR drc_bands_present; 116 UCHAR drc_band_incr; 117 UCHAR drc_band_top[MAX_DRC_BANDS]; 118 UCHAR drc_interpolation_scheme; 119 AACENC_METADATA_DRC_PROFILE drc_profile; 120 INT drc_TargetRefLevel; /* used for Limiter */ 121 122 /* excluded channels */ 123 UCHAR excluded_chns_present; 124 UCHAR exclude_mask[2]; /* MAX_NUMBER_CHANNELS/8 */ 125 } mpegDrc; 126 127 /* ETSI: addtl ancillary data */ 128 struct { 129 /* Heavy Compression */ 130 UCHAR compression_on; /* flag, if compression value should be written */ 131 UCHAR compression_value; /* compression value */ 132 AACENC_METADATA_DRC_PROFILE comp_profile; 133 INT comp_TargetRefLevel; /* used for Limiter */ 134 INT timecode_coarse_status; 135 INT timecode_fine_status; 136 } etsiAncData; 137 138 SCHAR centerMixLevel; /* center downmix level (0...7, according to table) */ 139 SCHAR surroundMixLevel; /* surround downmix level (0...7, according to table) */ 140 UCHAR WritePCEMixDwnIdx; /* flag */ 141 UCHAR DmxLvl_On; /* flag */ 142 143 UCHAR dolbySurroundMode; 144 145 UCHAR metadataMode; /* indicate meta data mode in current frame (delay line) */ 146 147 } AAC_METADATA; 148 149 struct FDK_METADATA_ENCODER 150 { 151 INT metadataMode; 152 HDRC_COMP hDrcComp; 153 AACENC_MetaData submittedMetaData; 154 155 INT nAudioDataDelay; 156 INT nMetaDataDelay; 157 INT nChannels; 158 159 INT_PCM audioDelayBuffer[MAX_DRC_CHANNELS*MAX_DRC_FRAMELEN]; 160 int audioDelayIdx; 161 162 AAC_METADATA metaDataBuffer[3]; 163 int metaDataDelayIdx; 164 165 UCHAR drcInfoPayload[12]; 166 UCHAR drcDsePayload[8]; 167 168 INT matrix_mixdown_idx; 169 AACENC_EXT_PAYLOAD exPayload[2]; 170 INT nExtensions; 171 172 INT finalizeMetaData; /* Delay switch off by one frame and write default configuration to 173 finalize the metadata setup. */ 174 }; 175 176 177 /*---------------- constants -----------------------*/ 178 static const AACENC_MetaData defaultMetaDataSetup = { 179 AACENC_METADATA_DRC_NONE, 180 AACENC_METADATA_DRC_NONE, 181 -(31<<16), 182 -(31<<16), 183 0, 184 -(31<<16), 185 0, 186 0, 187 0, 188 0, 189 0 190 }; 191 192 static const FIXP_DBL dmxTable[8] = { 193 ((FIXP_DBL)MAXVAL_DBL), FL2FXCONST_DBL(0.841f), FL2FXCONST_DBL(0.707f), FL2FXCONST_DBL(0.596f), 194 FL2FXCONST_DBL(0.500f), FL2FXCONST_DBL(0.422f), FL2FXCONST_DBL(0.355f), FL2FXCONST_DBL(0.000f) 195 }; 196 197 static const UCHAR surmix2matrix_mixdown_idx[8] = { 198 0, 0, 0, 1, 1, 2, 2, 3 199 }; 200 201 202 /*--------------- function declarations --------------------*/ 203 static FDK_METADATA_ERROR WriteMetadataPayload( 204 const HANDLE_FDK_METADATA_ENCODER hMetaData, 205 const AAC_METADATA * const pMetadata 206 ); 207 208 static INT WriteDynamicRangeInfoPayload( 209 const AAC_METADATA* const pMetadata, 210 UCHAR* const pExtensionPayload 211 ); 212 213 static INT WriteEtsiAncillaryDataPayload( 214 const AAC_METADATA* const pMetadata, 215 UCHAR* const pExtensionPayload 216 ); 217 218 static FDK_METADATA_ERROR CompensateAudioDelay( 219 HANDLE_FDK_METADATA_ENCODER hMetaDataEnc, 220 INT_PCM * const pAudioSamples, 221 const INT nAudioSamples 222 ); 223 224 static FDK_METADATA_ERROR LoadSubmittedMetadata( 225 const AACENC_MetaData * const hMetadata, 226 const INT nChannels, 227 const INT metadataMode, 228 AAC_METADATA * const pAacMetaData 229 ); 230 231 static FDK_METADATA_ERROR ProcessCompressor( 232 AAC_METADATA *pMetadata, 233 HDRC_COMP hDrcComp, 234 const INT_PCM * const pSamples, 235 const INT nSamples 236 ); 237 238 /*------------- function definitions ----------------*/ 239 240 static DRC_PROFILE convertProfile(AACENC_METADATA_DRC_PROFILE aacProfile) 241 { 242 DRC_PROFILE drcProfile = DRC_NONE; 243 244 switch(aacProfile) { 245 case AACENC_METADATA_DRC_NONE: drcProfile = DRC_NONE; break; 246 case AACENC_METADATA_DRC_FILMSTANDARD: drcProfile = DRC_FILMSTANDARD; break; 247 case AACENC_METADATA_DRC_FILMLIGHT: drcProfile = DRC_FILMLIGHT; break; 248 case AACENC_METADATA_DRC_MUSICSTANDARD: drcProfile = DRC_MUSICSTANDARD; break; 249 case AACENC_METADATA_DRC_MUSICLIGHT: drcProfile = DRC_MUSICLIGHT; break; 250 case AACENC_METADATA_DRC_SPEECH: drcProfile = DRC_SPEECH; break; 251 default: drcProfile = DRC_NONE; break; 252 } 253 return drcProfile; 254 } 255 256 257 /* convert dialog normalization to program reference level */ 258 /* NOTE: this only is correct, if the decoder target level is set to -31dB for line mode / -20dB for RF mode */ 259 static UCHAR dialnorm2progreflvl(const INT d) 260 { 261 return ((UCHAR)FDKmax(0, FDKmin((-d + (1<<13)) >> 14, 127))); 262 } 263 264 /* convert program reference level to dialog normalization */ 265 static INT progreflvl2dialnorm(const UCHAR p) 266 { 267 return -((INT)(p<<(16-2))); 268 } 269 270 /* encode downmix levels to Downmixing_levels_MPEG4 */ 271 static SCHAR encodeDmxLvls(const SCHAR cmixlev, const SCHAR surmixlev) 272 { 273 SCHAR dmxLvls = 0; 274 dmxLvls |= 0x80 | (cmixlev << 4); /* center_mix_level_on */ 275 dmxLvls |= 0x08 | surmixlev; /* surround_mix_level_on */ 276 277 return dmxLvls; 278 } 279 280 /* encode AAC DRC gain (ISO/IEC 14496-3:2005 4.5.2.7) */ 281 static void encodeDynrng(INT gain, UCHAR* const dyn_rng_ctl, UCHAR* const dyn_rng_sgn ) 282 { 283 if(gain < 0) 284 { 285 *dyn_rng_sgn = 1; 286 gain = -gain; 287 } 288 else 289 { 290 *dyn_rng_sgn = 0; 291 } 292 gain = FDKmin(gain,(127<<14)); 293 294 *dyn_rng_ctl = (UCHAR)((gain + (1<<13)) >> 14); 295 } 296 297 /* decode AAC DRC gain (ISO/IEC 14496-3:2005 4.5.2.7) */ 298 static INT decodeDynrng(const UCHAR dyn_rng_ctl, const UCHAR dyn_rng_sgn) 299 { 300 INT tmp = ((INT)dyn_rng_ctl << (16-2)); 301 if (dyn_rng_sgn) tmp = -tmp; 302 303 return tmp; 304 } 305 306 /* encode AAC compression value (ETSI TS 101 154 page 99) */ 307 static UCHAR encodeCompr(INT gain) 308 { 309 UCHAR x, y; 310 INT tmp; 311 312 /* tmp = (int)((48.164f - gain) / 6.0206f * 15 + 0.5f); */ 313 tmp = ((3156476 - gain) * 15 + 197283) / 394566; 314 315 if (tmp >= 240) { 316 return 0xFF; 317 } 318 else if (tmp < 0) { 319 return 0; 320 } 321 else { 322 x = tmp / 15; 323 y = tmp % 15; 324 } 325 326 return (x << 4) | y; 327 } 328 329 /* decode AAC compression value (ETSI TS 101 154 page 99) */ 330 static INT decodeCompr(const UCHAR compr) 331 { 332 INT gain; 333 SCHAR x = compr >> 4; /* 4 MSB of compr */ 334 UCHAR y = (compr & 0x0F); /* 4 LSB of compr */ 335 336 /* gain = (INT)((48.164f - 6.0206f * x - 0.4014f * y) ); */ 337 gain = (INT)( scaleValue(((LONG)FL2FXCONST_DBL(6.0206f/128.f)*(8-x) - (LONG)FL2FXCONST_DBL(0.4014f/128.f)*y), -(DFRACT_BITS-1-7-16)) ); 338 339 return gain; 340 } 341 342 343 FDK_METADATA_ERROR FDK_MetadataEnc_Open( 344 HANDLE_FDK_METADATA_ENCODER *phMetaData 345 ) 346 { 347 FDK_METADATA_ERROR err = METADATA_OK; 348 HANDLE_FDK_METADATA_ENCODER hMetaData = NULL; 349 350 if (phMetaData == NULL) { 351 err = METADATA_INVALID_HANDLE; 352 goto bail; 353 } 354 355 /* allocate memory */ 356 hMetaData = (HANDLE_FDK_METADATA_ENCODER) FDKcalloc(1, sizeof(FDK_METADATA_ENCODER) ); 357 358 if (hMetaData == NULL) { 359 err = METADATA_MEMORY_ERROR; 360 goto bail; 361 } 362 363 FDKmemclear(hMetaData, sizeof(FDK_METADATA_ENCODER)); 364 365 /* Allocate DRC Compressor. */ 366 if (FDK_DRC_Generator_Open(&hMetaData->hDrcComp)!=0) { 367 err = METADATA_MEMORY_ERROR; 368 goto bail; 369 } 370 371 /* Return metadata instance */ 372 *phMetaData = hMetaData; 373 374 return err; 375 376 bail: 377 FDK_MetadataEnc_Close(&hMetaData); 378 return err; 379 } 380 381 FDK_METADATA_ERROR FDK_MetadataEnc_Close( 382 HANDLE_FDK_METADATA_ENCODER *phMetaData 383 ) 384 { 385 FDK_METADATA_ERROR err = METADATA_OK; 386 387 if (phMetaData == NULL) { 388 err = METADATA_INVALID_HANDLE; 389 goto bail; 390 } 391 392 if (*phMetaData != NULL) { 393 FDK_DRC_Generator_Close(&(*phMetaData)->hDrcComp); 394 FDKfree(*phMetaData); 395 *phMetaData = NULL; 396 } 397 bail: 398 return err; 399 } 400 401 FDK_METADATA_ERROR FDK_MetadataEnc_Init( 402 HANDLE_FDK_METADATA_ENCODER hMetaData, 403 const INT resetStates, 404 const INT metadataMode, 405 const INT audioDelay, 406 const UINT frameLength, 407 const UINT sampleRate, 408 const UINT nChannels, 409 const CHANNEL_MODE channelMode, 410 const CHANNEL_ORDER channelOrder 411 ) 412 { 413 FDK_METADATA_ERROR err = METADATA_OK; 414 int i, nFrames, delay; 415 416 if (hMetaData==NULL) { 417 err = METADATA_INVALID_HANDLE; 418 goto bail; 419 } 420 421 /* Determine values for delay compensation. */ 422 for (nFrames=0, delay=audioDelay-frameLength; delay>0; delay-=frameLength, nFrames++); 423 424 if ( (hMetaData->nChannels>MAX_DRC_CHANNELS) || ((-delay)>MAX_DRC_FRAMELEN) ) { 425 err = METADATA_INIT_ERROR; 426 goto bail; 427 } 428 429 /* Initialize with default setup. */ 430 FDKmemcpy(&hMetaData->submittedMetaData, &defaultMetaDataSetup, sizeof(AACENC_MetaData)); 431 432 hMetaData->finalizeMetaData = 0; /* finalize meta data only while on/off switching, else disabled */ 433 434 /* Reset delay lines. */ 435 if ( resetStates || (hMetaData->nAudioDataDelay!=-delay) || (hMetaData->nChannels!=(INT)nChannels) ) 436 { 437 FDKmemclear(hMetaData->audioDelayBuffer, sizeof(hMetaData->audioDelayBuffer)); 438 FDKmemclear(hMetaData->metaDataBuffer, sizeof(hMetaData->metaDataBuffer)); 439 hMetaData->audioDelayIdx = 0; 440 hMetaData->metaDataDelayIdx = 0; 441 } 442 else { 443 /* Enable meta data. */ 444 if ( (hMetaData->metadataMode==0) && (metadataMode!=0) ) { 445 /* disable meta data in all delay lines */ 446 for (i=0; i<(int)(sizeof(hMetaData->metaDataBuffer)/sizeof(AAC_METADATA)); i++) { 447 LoadSubmittedMetadata(&hMetaData->submittedMetaData, nChannels, 0, &hMetaData->metaDataBuffer[i]); 448 } 449 } 450 451 /* Disable meta data.*/ 452 if ( (hMetaData->metadataMode!=0) && (metadataMode==0) ) { 453 hMetaData->finalizeMetaData = hMetaData->metadataMode; 454 } 455 } 456 457 /* Initialize delay. */ 458 hMetaData->nAudioDataDelay = -delay; 459 hMetaData->nMetaDataDelay = nFrames; 460 hMetaData->nChannels = nChannels; 461 hMetaData->metadataMode = metadataMode; 462 463 /* Initialize compressor. */ 464 if (metadataMode != 0) { 465 if ( FDK_DRC_Generator_Initialize( 466 hMetaData->hDrcComp, 467 DRC_NONE, 468 DRC_NONE, 469 frameLength, 470 sampleRate, 471 channelMode, 472 channelOrder, 473 1) != 0) 474 { 475 err = METADATA_INIT_ERROR; 476 } 477 } 478 bail: 479 return err; 480 } 481 482 static FDK_METADATA_ERROR ProcessCompressor( 483 AAC_METADATA *pMetadata, 484 HDRC_COMP hDrcComp, 485 const INT_PCM * const pSamples, 486 const INT nSamples 487 ) 488 { 489 FDK_METADATA_ERROR err = METADATA_OK; 490 491 INT dynrng, compr; 492 DRC_PROFILE profileDrc = convertProfile(pMetadata->mpegDrc.drc_profile); 493 DRC_PROFILE profileComp = convertProfile(pMetadata->etsiAncData.comp_profile); 494 495 if ( (pMetadata==NULL) || (hDrcComp==NULL) ) { 496 err = METADATA_INVALID_HANDLE; 497 return err; 498 } 499 500 /* first, check if profile is same as last frame 501 * otherwise, update setup */ 502 if ( (profileDrc != FDK_DRC_Generator_getDrcProfile(hDrcComp)) 503 || (profileComp != FDK_DRC_Generator_getCompProfile(hDrcComp)) ) 504 { 505 FDK_DRC_Generator_setDrcProfile(hDrcComp, profileDrc, profileComp); 506 } 507 508 /* Sanity check */ 509 if (profileComp == DRC_NONE) { 510 pMetadata->etsiAncData.compression_value = 0x80; /* to ensure no external values will be written if not configured */ 511 } 512 513 /* in case of embedding external values, copy this now (limiter may overwrite them) */ 514 dynrng = decodeDynrng(pMetadata->mpegDrc.dyn_rng_ctl[0], pMetadata->mpegDrc.dyn_rng_sgn[0]); 515 compr = decodeCompr(pMetadata->etsiAncData.compression_value); 516 517 /* Call compressor */ 518 if (FDK_DRC_Generator_Calc(hDrcComp, 519 pSamples, 520 progreflvl2dialnorm(pMetadata->mpegDrc.prog_ref_level), 521 pMetadata->mpegDrc.drc_TargetRefLevel, 522 pMetadata->etsiAncData.comp_TargetRefLevel, 523 dmxTable[pMetadata->centerMixLevel], 524 dmxTable[pMetadata->surroundMixLevel], 525 &dynrng, 526 &compr) != 0) 527 { 528 err = METADATA_ENCODE_ERROR; 529 goto bail; 530 } 531 532 /* Write DRC values */ 533 pMetadata->mpegDrc.drc_band_incr = 0; 534 encodeDynrng(dynrng, pMetadata->mpegDrc.dyn_rng_ctl, pMetadata->mpegDrc.dyn_rng_sgn); 535 pMetadata->etsiAncData.compression_value = encodeCompr(compr); 536 537 bail: 538 return err; 539 } 540 541 FDK_METADATA_ERROR FDK_MetadataEnc_Process( 542 HANDLE_FDK_METADATA_ENCODER hMetaDataEnc, 543 INT_PCM * const pAudioSamples, 544 const INT nAudioSamples, 545 const AACENC_MetaData * const pMetadata, 546 AACENC_EXT_PAYLOAD ** ppMetaDataExtPayload, 547 UINT * nMetaDataExtensions, 548 INT * matrix_mixdown_idx 549 ) 550 { 551 FDK_METADATA_ERROR err = METADATA_OK; 552 int metaDataDelayWriteIdx, metaDataDelayReadIdx, metadataMode; 553 554 /* Where to write new meta data info */ 555 metaDataDelayWriteIdx = hMetaDataEnc->metaDataDelayIdx; 556 557 /* How to write the data */ 558 metadataMode = hMetaDataEnc->metadataMode; 559 560 /* Compensate meta data delay. */ 561 hMetaDataEnc->metaDataDelayIdx++; 562 if (hMetaDataEnc->metaDataDelayIdx > hMetaDataEnc->nMetaDataDelay) hMetaDataEnc->metaDataDelayIdx = 0; 563 564 /* Where to read pending meta data info from. */ 565 metaDataDelayReadIdx = hMetaDataEnc->metaDataDelayIdx; 566 567 /* Submit new data if available. */ 568 if (pMetadata!=NULL) { 569 FDKmemcpy(&hMetaDataEnc->submittedMetaData, pMetadata, sizeof(AACENC_MetaData)); 570 } 571 572 /* Write one additional frame with default configuration of meta data. Ensure defined behaviour on decoder side. */ 573 if ( (hMetaDataEnc->finalizeMetaData!=0) && (hMetaDataEnc->metadataMode==0)) { 574 FDKmemcpy(&hMetaDataEnc->submittedMetaData, &defaultMetaDataSetup, sizeof(AACENC_MetaData)); 575 metadataMode = hMetaDataEnc->finalizeMetaData; 576 hMetaDataEnc->finalizeMetaData = 0; 577 } 578 579 /* Get last submitted data. */ 580 if ( (err = LoadSubmittedMetadata( 581 &hMetaDataEnc->submittedMetaData, 582 hMetaDataEnc->nChannels, 583 metadataMode, 584 &hMetaDataEnc->metaDataBuffer[metaDataDelayWriteIdx])) != METADATA_OK ) 585 { 586 goto bail; 587 } 588 589 /* Calculate compressor if necessary and updata meta data info */ 590 if (hMetaDataEnc->metaDataBuffer[metaDataDelayWriteIdx].metadataMode != 0) { 591 if ( (err = ProcessCompressor( 592 &hMetaDataEnc->metaDataBuffer[metaDataDelayWriteIdx], 593 hMetaDataEnc->hDrcComp, 594 pAudioSamples, 595 nAudioSamples)) != METADATA_OK) 596 { 597 /* Get last submitted data again. */ 598 LoadSubmittedMetadata( 599 &hMetaDataEnc->submittedMetaData, 600 hMetaDataEnc->nChannels, 601 metadataMode, 602 &hMetaDataEnc->metaDataBuffer[metaDataDelayWriteIdx]); 603 } 604 } 605 606 /* Convert Meta Data side info to bitstream data. */ 607 if ( (err = WriteMetadataPayload(hMetaDataEnc, &hMetaDataEnc->metaDataBuffer[metaDataDelayReadIdx])) != METADATA_OK ) { 608 goto bail; 609 } 610 611 /* Assign meta data to output */ 612 *ppMetaDataExtPayload = hMetaDataEnc->exPayload; 613 *nMetaDataExtensions = hMetaDataEnc->nExtensions; 614 *matrix_mixdown_idx = hMetaDataEnc->matrix_mixdown_idx; 615 616 bail: 617 /* Compensate audio delay, reset err status. */ 618 err = CompensateAudioDelay(hMetaDataEnc, pAudioSamples, nAudioSamples); 619 620 return err; 621 } 622 623 624 static FDK_METADATA_ERROR CompensateAudioDelay( 625 HANDLE_FDK_METADATA_ENCODER hMetaDataEnc, 626 INT_PCM * const pAudioSamples, 627 const INT nAudioSamples 628 ) 629 { 630 FDK_METADATA_ERROR err = METADATA_OK; 631 632 if (hMetaDataEnc->nAudioDataDelay) { 633 int i, delaySamples = hMetaDataEnc->nAudioDataDelay*hMetaDataEnc->nChannels; 634 635 for (i = 0; i < nAudioSamples; i++) { 636 INT_PCM tmp = pAudioSamples[i]; 637 pAudioSamples[i] = hMetaDataEnc->audioDelayBuffer[hMetaDataEnc->audioDelayIdx]; 638 hMetaDataEnc->audioDelayBuffer[hMetaDataEnc->audioDelayIdx] = tmp; 639 640 hMetaDataEnc->audioDelayIdx++; 641 if (hMetaDataEnc->audioDelayIdx >= delaySamples) hMetaDataEnc->audioDelayIdx = 0; 642 } 643 } 644 645 return err; 646 } 647 648 /*----------------------------------------------------------------------------- 649 650 functionname: WriteMetadataPayload 651 description: fills anc data and extension payload 652 returns: Error status 653 654 ------------------------------------------------------------------------------*/ 655 static FDK_METADATA_ERROR WriteMetadataPayload( 656 const HANDLE_FDK_METADATA_ENCODER hMetaData, 657 const AAC_METADATA * const pMetadata 658 ) 659 { 660 FDK_METADATA_ERROR err = METADATA_OK; 661 662 if ( (hMetaData==NULL) || (pMetadata==NULL) ) { 663 err = METADATA_INVALID_HANDLE; 664 goto bail; 665 } 666 667 hMetaData->nExtensions = 0; 668 hMetaData->matrix_mixdown_idx = -1; 669 670 /* AAC-DRC */ 671 if (pMetadata->metadataMode != 0) 672 { 673 hMetaData->exPayload[hMetaData->nExtensions].pData = hMetaData->drcInfoPayload; 674 hMetaData->exPayload[hMetaData->nExtensions].dataType = EXT_DYNAMIC_RANGE; 675 hMetaData->exPayload[hMetaData->nExtensions].associatedChElement = -1; 676 677 hMetaData->exPayload[hMetaData->nExtensions].dataSize = 678 WriteDynamicRangeInfoPayload(pMetadata, hMetaData->exPayload[hMetaData->nExtensions].pData); 679 680 hMetaData->nExtensions++; 681 682 /* Matrix Mixdown Coefficient in PCE */ 683 if (pMetadata->WritePCEMixDwnIdx) { 684 hMetaData->matrix_mixdown_idx = surmix2matrix_mixdown_idx[pMetadata->surroundMixLevel]; 685 } 686 687 /* ETSI TS 101 154 (DVB) - MPEG4 ancillary_data() */ 688 if (pMetadata->metadataMode == 2) /* MP4_METADATA_MPEG_ETSI */ 689 { 690 hMetaData->exPayload[hMetaData->nExtensions].pData = hMetaData->drcDsePayload; 691 hMetaData->exPayload[hMetaData->nExtensions].dataType = EXT_DATA_ELEMENT; 692 hMetaData->exPayload[hMetaData->nExtensions].associatedChElement = -1; 693 694 hMetaData->exPayload[hMetaData->nExtensions].dataSize = 695 WriteEtsiAncillaryDataPayload(pMetadata,hMetaData->exPayload[hMetaData->nExtensions].pData); 696 697 hMetaData->nExtensions++; 698 } /* metadataMode == 2 */ 699 700 } /* metadataMode != 0 */ 701 702 bail: 703 return err; 704 } 705 706 static INT WriteDynamicRangeInfoPayload( 707 const AAC_METADATA* const pMetadata, 708 UCHAR* const pExtensionPayload 709 ) 710 { 711 const INT pce_tag_present = 0; /* yet fixed setting! */ 712 const INT prog_ref_lev_res_bits = 0; 713 INT i, drc_num_bands = 1; 714 715 FDK_BITSTREAM bsWriter; 716 FDKinitBitStream(&bsWriter, pExtensionPayload, 16, 0, BS_WRITER); 717 718 /* dynamic_range_info() */ 719 FDKwriteBits(&bsWriter, pce_tag_present, 1); /* pce_tag_present */ 720 if (pce_tag_present) { 721 FDKwriteBits(&bsWriter, 0x0, 4); /* pce_instance_tag */ 722 FDKwriteBits(&bsWriter, 0x0, 4); /* drc_tag_reserved_bits */ 723 } 724 725 /* Exclude channels */ 726 FDKwriteBits(&bsWriter, (pMetadata->mpegDrc.excluded_chns_present) ? 1 : 0, 1); /* excluded_chns_present*/ 727 728 /* Multiband DRC */ 729 FDKwriteBits(&bsWriter, (pMetadata->mpegDrc.drc_bands_present) ? 1 : 0, 1); /* drc_bands_present */ 730 if (pMetadata->mpegDrc.drc_bands_present) 731 { 732 FDKwriteBits(&bsWriter, pMetadata->mpegDrc.drc_band_incr, 4); /* drc_band_incr */ 733 FDKwriteBits(&bsWriter, pMetadata->mpegDrc.drc_interpolation_scheme, 4); /* drc_interpolation_scheme */ 734 drc_num_bands += pMetadata->mpegDrc.drc_band_incr; 735 for (i=0; i<drc_num_bands; i++) { 736 FDKwriteBits(&bsWriter, pMetadata->mpegDrc.drc_band_top[i], 8); /* drc_band_top */ 737 } 738 } 739 740 /* Program Reference Level */ 741 FDKwriteBits(&bsWriter, pMetadata->mpegDrc.prog_ref_level_present, 1); /* prog_ref_level_present */ 742 if (pMetadata->mpegDrc.prog_ref_level_present) 743 { 744 FDKwriteBits(&bsWriter, pMetadata->mpegDrc.prog_ref_level, 7); /* prog_ref_level */ 745 FDKwriteBits(&bsWriter, prog_ref_lev_res_bits, 1); /* prog_ref_level_reserved_bits */ 746 } 747 748 /* DRC Values */ 749 for (i=0; i<drc_num_bands; i++) { 750 FDKwriteBits(&bsWriter, (pMetadata->mpegDrc.dyn_rng_sgn[i]) ? 1 : 0, 1); /* dyn_rng_sgn[ */ 751 FDKwriteBits(&bsWriter, pMetadata->mpegDrc.dyn_rng_ctl[i], 7); /* dyn_rng_ctl */ 752 } 753 754 /* return number of valid bits in extension payload. */ 755 return FDKgetValidBits(&bsWriter); 756 } 757 758 static INT WriteEtsiAncillaryDataPayload( 759 const AAC_METADATA* const pMetadata, 760 UCHAR* const pExtensionPayload 761 ) 762 { 763 FDK_BITSTREAM bsWriter; 764 FDKinitBitStream(&bsWriter, pExtensionPayload, 16, 0, BS_WRITER); 765 766 /* ancillary_data_sync */ 767 FDKwriteBits(&bsWriter, 0xBC, 8); 768 769 /* bs_info */ 770 FDKwriteBits(&bsWriter, 0x3, 2); /* mpeg_audio_type */ 771 FDKwriteBits(&bsWriter, pMetadata->dolbySurroundMode, 2); /* dolby_surround_mode */ 772 FDKwriteBits(&bsWriter, 0x0, 4); /* reserved */ 773 774 /* ancillary_data_status */ 775 FDKwriteBits(&bsWriter, 0, 3); /* 3 bit Reserved, set to "0" */ 776 FDKwriteBits(&bsWriter, (pMetadata->DmxLvl_On) ? 1 : 0, 1); /* downmixing_levels_MPEG4_status */ 777 FDKwriteBits(&bsWriter, 0, 1); /* Reserved, set to "0" */ 778 FDKwriteBits(&bsWriter, (pMetadata->etsiAncData.compression_on) ? 1 : 0, 1); /* audio_coding_mode_and_compression status */ 779 FDKwriteBits(&bsWriter, (pMetadata->etsiAncData.timecode_coarse_status) ? 1 : 0, 1); /* coarse_grain_timecode_status */ 780 FDKwriteBits(&bsWriter, (pMetadata->etsiAncData.timecode_fine_status) ? 1 : 0, 1); /* fine_grain_timecode_status */ 781 782 /* downmixing_levels_MPEG4_status */ 783 if (pMetadata->DmxLvl_On) { 784 FDKwriteBits(&bsWriter, encodeDmxLvls(pMetadata->centerMixLevel, pMetadata->surroundMixLevel), 8); 785 } 786 787 /* audio_coding_mode_and_compression_status */ 788 if (pMetadata->etsiAncData.compression_on) { 789 FDKwriteBits(&bsWriter, 0x01, 8); /* audio coding mode */ 790 FDKwriteBits(&bsWriter, pMetadata->etsiAncData.compression_value, 8); /* compression value */ 791 } 792 793 /* grain-timecode coarse/fine */ 794 if (pMetadata->etsiAncData.timecode_coarse_status) { 795 FDKwriteBits(&bsWriter, 0x0, 16); /* not yet supported */ 796 } 797 798 if (pMetadata->etsiAncData.timecode_fine_status) { 799 FDKwriteBits(&bsWriter, 0x0, 16); /* not yet supported */ 800 } 801 802 return FDKgetValidBits(&bsWriter); 803 } 804 805 806 static FDK_METADATA_ERROR LoadSubmittedMetadata( 807 const AACENC_MetaData * const hMetadata, 808 const INT nChannels, 809 const INT metadataMode, 810 AAC_METADATA * const pAacMetaData 811 ) 812 { 813 FDK_METADATA_ERROR err = METADATA_OK; 814 815 if (pAacMetaData==NULL) { 816 err = METADATA_INVALID_HANDLE; 817 } 818 else { 819 /* init struct */ 820 FDKmemclear(pAacMetaData, sizeof(AAC_METADATA)); 821 822 if (hMetadata!=NULL) { 823 /* convert data */ 824 pAacMetaData->mpegDrc.drc_profile = hMetadata->drc_profile; 825 pAacMetaData->etsiAncData.comp_profile = hMetadata->comp_profile; 826 pAacMetaData->mpegDrc.drc_TargetRefLevel = hMetadata->drc_TargetRefLevel; 827 pAacMetaData->etsiAncData.comp_TargetRefLevel= hMetadata->comp_TargetRefLevel; 828 pAacMetaData->mpegDrc.prog_ref_level_present = hMetadata->prog_ref_level_present; 829 pAacMetaData->mpegDrc.prog_ref_level = dialnorm2progreflvl(hMetadata->prog_ref_level); 830 831 pAacMetaData->centerMixLevel = hMetadata->centerMixLevel; 832 pAacMetaData->surroundMixLevel = hMetadata->surroundMixLevel; 833 pAacMetaData->WritePCEMixDwnIdx = hMetadata->PCE_mixdown_idx_present; 834 pAacMetaData->DmxLvl_On = hMetadata->ETSI_DmxLvl_present; 835 836 pAacMetaData->etsiAncData.compression_on = 1; 837 838 839 if (nChannels == 2) { 840 pAacMetaData->dolbySurroundMode = hMetadata->dolbySurroundMode; /* dolby_surround_mode */ 841 } else { 842 pAacMetaData->dolbySurroundMode = 0; 843 } 844 845 pAacMetaData->etsiAncData.timecode_coarse_status = 0; /* not yet supported - attention: Update GetEstMetadataBytesPerFrame() if enable this! */ 846 pAacMetaData->etsiAncData.timecode_fine_status = 0; /* not yet supported - attention: Update GetEstMetadataBytesPerFrame() if enable this! */ 847 848 pAacMetaData->metadataMode = metadataMode; 849 } 850 else { 851 pAacMetaData->metadataMode = 0; /* there is no configuration available */ 852 } 853 } 854 855 return err; 856 } 857 858 INT FDK_MetadataEnc_GetDelay( 859 HANDLE_FDK_METADATA_ENCODER hMetadataEnc 860 ) 861 { 862 INT delay = 0; 863 864 if (hMetadataEnc!=NULL) { 865 delay = hMetadataEnc->nAudioDataDelay; 866 } 867 868 return delay; 869 } 870 871 872
