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 /*! 85 \file 86 \brief SBR bit writing routines 87 */ 88 89 90 #include "bit_sbr.h" 91 92 #include "code_env.h" 93 #include "cmondata.h" 94 #include "sbr.h" 95 96 #include "ps_main.h" 97 98 typedef enum { 99 SBR_ID_SCE = 1, 100 SBR_ID_CPE 101 } SBR_ELEMENT_TYPE; 102 103 104 static INT encodeSbrData (HANDLE_SBR_ENV_DATA sbrEnvDataLeft, 105 HANDLE_SBR_ENV_DATA sbrEnvDataRight, 106 HANDLE_PARAMETRIC_STEREO hParametricStereo, 107 HANDLE_COMMON_DATA cmonData, 108 SBR_ELEMENT_TYPE sbrElem, 109 INT coupling, 110 UINT sbrSyntaxFlags); 111 112 static INT encodeSbrHeader (HANDLE_SBR_HEADER_DATA sbrHeaderData, 113 HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData, 114 HANDLE_COMMON_DATA cmonData); 115 116 117 static INT encodeSbrHeaderData (HANDLE_SBR_HEADER_DATA sbrHeaderData, 118 HANDLE_FDK_BITSTREAM hBitStream); 119 120 static INT encodeSbrSingleChannelElement (HANDLE_SBR_ENV_DATA sbrEnvData, 121 HANDLE_FDK_BITSTREAM hBitStream 122 ,HANDLE_PARAMETRIC_STEREO hParametricStereo 123 ,UINT sbrSyntaxFlags 124 ); 125 126 127 128 static INT encodeSbrChannelPairElement (HANDLE_SBR_ENV_DATA sbrEnvDataLeft, 129 HANDLE_SBR_ENV_DATA sbrEnvDataRight, 130 HANDLE_PARAMETRIC_STEREO hParametricStereo, 131 HANDLE_FDK_BITSTREAM hBitStream, 132 INT coupling); 133 134 135 static INT encodeSbrGrid (HANDLE_SBR_ENV_DATA sbrEnvData, 136 HANDLE_FDK_BITSTREAM hBitStream); 137 138 static int encodeLowDelaySbrGrid ( HANDLE_SBR_ENV_DATA sbrEnvData, 139 HANDLE_FDK_BITSTREAM hBitStream, 140 int transmitFreqs); 141 142 static INT encodeSbrDtdf (HANDLE_SBR_ENV_DATA sbrEnvData, 143 HANDLE_FDK_BITSTREAM hBitStream); 144 145 static INT writeNoiseLevelData (HANDLE_SBR_ENV_DATA sbrEnvData, 146 HANDLE_FDK_BITSTREAM hBitStream, 147 INT coupling); 148 149 static INT writeEnvelopeData (HANDLE_SBR_ENV_DATA sbrEnvData, 150 HANDLE_FDK_BITSTREAM hBitStream, 151 INT coupling); 152 153 static INT writeSyntheticCodingData (HANDLE_SBR_ENV_DATA sbrEnvData, 154 HANDLE_FDK_BITSTREAM hBitStream); 155 156 157 static INT encodeExtendedData (HANDLE_PARAMETRIC_STEREO hParametricStereo, 158 HANDLE_FDK_BITSTREAM hBitStream); 159 160 161 162 static INT getSbrExtendedDataSize (HANDLE_PARAMETRIC_STEREO hParametricStereo); 163 164 /***************************************************************************** 165 166 functionname: FDKsbrEnc_WriteEnvSingleChannelElement 167 description: writes pure SBR single channel data element 168 returns: number of bits written 169 input: 170 output: 171 172 *****************************************************************************/ 173 INT 174 FDKsbrEnc_WriteEnvSingleChannelElement( 175 HANDLE_SBR_HEADER_DATA sbrHeaderData, 176 HANDLE_PARAMETRIC_STEREO hParametricStereo, 177 HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData, 178 HANDLE_SBR_ENV_DATA sbrEnvData, 179 HANDLE_COMMON_DATA cmonData, 180 UINT sbrSyntaxFlags 181 ) 182 183 { 184 INT payloadBits = 0; 185 186 cmonData->sbrHdrBits = 0; 187 cmonData->sbrDataBits = 0; 188 189 /* write pure sbr data */ 190 if (sbrEnvData != NULL) { 191 192 /* write header */ 193 payloadBits += encodeSbrHeader (sbrHeaderData, 194 sbrBitstreamData, 195 cmonData); 196 197 198 /* write data */ 199 payloadBits += encodeSbrData (sbrEnvData, 200 NULL, 201 hParametricStereo, 202 cmonData, 203 SBR_ID_SCE, 204 0, 205 sbrSyntaxFlags); 206 207 } 208 return payloadBits; 209 } 210 211 /***************************************************************************** 212 213 functionname: FDKsbrEnc_WriteEnvChannelPairElement 214 description: writes pure SBR channel pair data element 215 returns: number of bits written 216 input: 217 output: 218 219 *****************************************************************************/ 220 INT 221 FDKsbrEnc_WriteEnvChannelPairElement (HANDLE_SBR_HEADER_DATA sbrHeaderData, 222 HANDLE_PARAMETRIC_STEREO hParametricStereo, 223 HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData, 224 HANDLE_SBR_ENV_DATA sbrEnvDataLeft, 225 HANDLE_SBR_ENV_DATA sbrEnvDataRight, 226 HANDLE_COMMON_DATA cmonData, 227 UINT sbrSyntaxFlags) 228 229 { 230 INT payloadBits = 0; 231 cmonData->sbrHdrBits = 0; 232 cmonData->sbrDataBits = 0; 233 234 /* write pure sbr data */ 235 if ((sbrEnvDataLeft != NULL) && (sbrEnvDataRight != NULL)) { 236 237 /* write header */ 238 payloadBits += encodeSbrHeader (sbrHeaderData, 239 sbrBitstreamData, 240 cmonData); 241 242 /* write data */ 243 payloadBits += encodeSbrData (sbrEnvDataLeft, 244 sbrEnvDataRight, 245 hParametricStereo, 246 cmonData, 247 SBR_ID_CPE, 248 sbrHeaderData->coupling, 249 sbrSyntaxFlags); 250 251 } 252 return payloadBits; 253 } 254 255 INT 256 FDKsbrEnc_CountSbrChannelPairElement (HANDLE_SBR_HEADER_DATA sbrHeaderData, 257 HANDLE_PARAMETRIC_STEREO hParametricStereo, 258 HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData, 259 HANDLE_SBR_ENV_DATA sbrEnvDataLeft, 260 HANDLE_SBR_ENV_DATA sbrEnvDataRight, 261 HANDLE_COMMON_DATA cmonData, 262 UINT sbrSyntaxFlags) 263 { 264 INT payloadBits; 265 INT bitPos = FDKgetValidBits(&cmonData->sbrBitbuf); 266 267 payloadBits = FDKsbrEnc_WriteEnvChannelPairElement(sbrHeaderData, 268 hParametricStereo, 269 sbrBitstreamData, 270 sbrEnvDataLeft, 271 sbrEnvDataRight, 272 cmonData, 273 sbrSyntaxFlags); 274 275 FDKpushBack(&cmonData->sbrBitbuf, (FDKgetValidBits(&cmonData->sbrBitbuf) - bitPos) ); 276 277 return payloadBits; 278 } 279 280 281 void sbrEncoder_GetHeader(SBR_ENCODER *sbrEncoder, 282 HANDLE_FDK_BITSTREAM hBs, 283 INT element_index, 284 int fSendHeaders) 285 { 286 int bits; 287 288 bits = encodeSbrHeaderData (&sbrEncoder->sbrElement[element_index]->sbrHeaderData, hBs); 289 290 if (fSendHeaders == 0) { 291 /* Prevent header being embedded into the SBR payload. */ 292 sbrEncoder->sbrElement[element_index]->sbrBitstreamData.NrSendHeaderData = -1; 293 sbrEncoder->sbrElement[element_index]->sbrBitstreamData.HeaderActive = 0; 294 sbrEncoder->sbrElement[element_index]->sbrBitstreamData.CountSendHeaderData = -1; 295 } 296 } 297 298 299 /***************************************************************************** 300 301 functionname: encodeSbrHeader 302 description: encodes SBR Header information 303 returns: number of bits written 304 input: 305 output: 306 307 *****************************************************************************/ 308 static INT 309 encodeSbrHeader (HANDLE_SBR_HEADER_DATA sbrHeaderData, 310 HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData, 311 HANDLE_COMMON_DATA cmonData) 312 { 313 INT payloadBits = 0; 314 315 if (sbrBitstreamData->HeaderActive) { 316 payloadBits += FDKwriteBits (&cmonData->sbrBitbuf, 1, 1); 317 payloadBits += encodeSbrHeaderData (sbrHeaderData, 318 &cmonData->sbrBitbuf); 319 } 320 else { 321 payloadBits += FDKwriteBits (&cmonData->sbrBitbuf, 0, 1); 322 } 323 324 cmonData->sbrHdrBits = payloadBits; 325 326 return payloadBits; 327 } 328 329 330 331 /***************************************************************************** 332 333 functionname: encodeSbrHeaderData 334 description: writes sbr_header() 335 bs_protocol_version through bs_header_extra_2 336 returns: number of bits written 337 input: 338 output: 339 340 *****************************************************************************/ 341 static INT 342 encodeSbrHeaderData (HANDLE_SBR_HEADER_DATA sbrHeaderData, 343 HANDLE_FDK_BITSTREAM hBitStream) 344 345 { 346 INT payloadBits = 0; 347 if (sbrHeaderData != NULL) { 348 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_amp_res, 349 SI_SBR_AMP_RES_BITS); 350 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_start_frequency, 351 SI_SBR_START_FREQ_BITS); 352 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_stop_frequency, 353 SI_SBR_STOP_FREQ_BITS); 354 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_xover_band, 355 SI_SBR_XOVER_BAND_BITS); 356 357 payloadBits += FDKwriteBits (hBitStream, 0, 358 SI_SBR_RESERVED_BITS); 359 360 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->header_extra_1, 361 SI_SBR_HEADER_EXTRA_1_BITS); 362 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->header_extra_2, 363 SI_SBR_HEADER_EXTRA_2_BITS); 364 365 366 if (sbrHeaderData->header_extra_1) { 367 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->freqScale, 368 SI_SBR_FREQ_SCALE_BITS); 369 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->alterScale, 370 SI_SBR_ALTER_SCALE_BITS); 371 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_noise_bands, 372 SI_SBR_NOISE_BANDS_BITS); 373 } /* sbrHeaderData->header_extra_1 */ 374 375 if (sbrHeaderData->header_extra_2) { 376 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_limiter_bands, 377 SI_SBR_LIMITER_BANDS_BITS); 378 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_limiter_gains, 379 SI_SBR_LIMITER_GAINS_BITS); 380 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_interpol_freq, 381 SI_SBR_INTERPOL_FREQ_BITS); 382 payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_smoothing_length, 383 SI_SBR_SMOOTHING_LENGTH_BITS); 384 385 } /* sbrHeaderData->header_extra_2 */ 386 } /* sbrHeaderData != NULL */ 387 388 return payloadBits; 389 } 390 391 392 /***************************************************************************** 393 394 functionname: encodeSbrData 395 description: encodes sbr Data information 396 returns: number of bits written 397 input: 398 output: 399 400 *****************************************************************************/ 401 static INT 402 encodeSbrData (HANDLE_SBR_ENV_DATA sbrEnvDataLeft, 403 HANDLE_SBR_ENV_DATA sbrEnvDataRight, 404 HANDLE_PARAMETRIC_STEREO hParametricStereo, 405 HANDLE_COMMON_DATA cmonData, 406 SBR_ELEMENT_TYPE sbrElem, 407 INT coupling, 408 UINT sbrSyntaxFlags) 409 { 410 INT payloadBits = 0; 411 412 switch (sbrElem) { 413 case SBR_ID_SCE: 414 payloadBits += encodeSbrSingleChannelElement (sbrEnvDataLeft, &cmonData->sbrBitbuf, hParametricStereo, sbrSyntaxFlags); 415 break; 416 case SBR_ID_CPE: 417 payloadBits += encodeSbrChannelPairElement (sbrEnvDataLeft, sbrEnvDataRight, hParametricStereo, &cmonData->sbrBitbuf, coupling); 418 break; 419 default: 420 /* we never should apply SBR to any other element type */ 421 FDK_ASSERT (0); 422 } 423 424 cmonData->sbrDataBits = payloadBits; 425 426 return payloadBits; 427 } 428 429 #define MODE_FREQ_TANS 1 430 #define MODE_NO_FREQ_TRAN 0 431 #define LD_TRANSMISSION MODE_FREQ_TANS 432 static int encodeFreqs (int mode) { 433 return ((mode & MODE_FREQ_TANS) ? 1 : 0); 434 } 435 436 437 /***************************************************************************** 438 439 functionname: encodeSbrSingleChannelElement 440 description: encodes sbr SCE information 441 returns: number of bits written 442 input: 443 output: 444 445 *****************************************************************************/ 446 static INT 447 encodeSbrSingleChannelElement (HANDLE_SBR_ENV_DATA sbrEnvData, 448 HANDLE_FDK_BITSTREAM hBitStream 449 ,HANDLE_PARAMETRIC_STEREO hParametricStereo 450 ,UINT sbrSyntaxFlags 451 ) 452 { 453 INT i, payloadBits = 0; 454 455 payloadBits += FDKwriteBits (hBitStream, 0, SI_SBR_DATA_EXTRA_BITS); /* no reserved bits */ 456 457 if (sbrEnvData->ldGrid) { 458 if ( sbrEnvData->hSbrBSGrid->frameClass != FIXFIXonly ) { 459 /* encode normal SbrGrid */ 460 payloadBits += encodeSbrGrid (sbrEnvData, hBitStream); 461 } else { 462 /* use FIXFIXonly frame Grid */ 463 payloadBits += encodeLowDelaySbrGrid ( sbrEnvData, hBitStream, encodeFreqs(LD_TRANSMISSION)); 464 } 465 } 466 else 467 { 468 if (sbrSyntaxFlags & SBR_SYNTAX_SCALABLE) { 469 payloadBits += FDKwriteBits (hBitStream, 1, SI_SBR_COUPLING_BITS); 470 } 471 payloadBits += encodeSbrGrid (sbrEnvData, hBitStream); 472 } 473 474 payloadBits += encodeSbrDtdf (sbrEnvData, hBitStream); 475 476 for (i = 0; i < sbrEnvData->noOfnoisebands; i++) { 477 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->sbr_invf_mode_vec[i], SI_SBR_INVF_MODE_BITS); 478 } 479 480 payloadBits += writeEnvelopeData (sbrEnvData, hBitStream, 0); 481 payloadBits += writeNoiseLevelData (sbrEnvData, hBitStream, 0); 482 483 payloadBits += writeSyntheticCodingData (sbrEnvData,hBitStream); 484 485 payloadBits += encodeExtendedData(hParametricStereo, hBitStream); 486 487 return payloadBits; 488 } 489 490 491 /***************************************************************************** 492 493 functionname: encodeSbrChannelPairElement 494 description: encodes sbr CPE information 495 returns: 496 input: 497 output: 498 499 *****************************************************************************/ 500 static INT 501 encodeSbrChannelPairElement (HANDLE_SBR_ENV_DATA sbrEnvDataLeft, 502 HANDLE_SBR_ENV_DATA sbrEnvDataRight, 503 HANDLE_PARAMETRIC_STEREO hParametricStereo, 504 HANDLE_FDK_BITSTREAM hBitStream, 505 INT coupling) 506 { 507 INT payloadBits = 0; 508 INT i = 0; 509 510 payloadBits += FDKwriteBits (hBitStream, 0, SI_SBR_DATA_EXTRA_BITS); /* no reserved bits */ 511 512 payloadBits += FDKwriteBits (hBitStream, coupling, SI_SBR_COUPLING_BITS); 513 514 if (coupling) { 515 if (sbrEnvDataLeft->ldGrid) { 516 if ( sbrEnvDataLeft->hSbrBSGrid->frameClass != FIXFIXonly ) { 517 /* normal SbrGrid */ 518 payloadBits += encodeSbrGrid (sbrEnvDataLeft, hBitStream); 519 520 } else { 521 /* FIXFIXonly frame Grid */ 522 payloadBits += encodeLowDelaySbrGrid ( sbrEnvDataLeft, hBitStream, encodeFreqs(LD_TRANSMISSION)); 523 } 524 } else 525 payloadBits += encodeSbrGrid (sbrEnvDataLeft, hBitStream); 526 527 payloadBits += encodeSbrDtdf (sbrEnvDataLeft, hBitStream); 528 payloadBits += encodeSbrDtdf (sbrEnvDataRight, hBitStream); 529 530 for (i = 0; i < sbrEnvDataLeft->noOfnoisebands; i++) { 531 payloadBits += FDKwriteBits (hBitStream, sbrEnvDataLeft->sbr_invf_mode_vec[i], SI_SBR_INVF_MODE_BITS); 532 } 533 534 payloadBits += writeEnvelopeData (sbrEnvDataLeft, hBitStream,1); 535 payloadBits += writeNoiseLevelData (sbrEnvDataLeft, hBitStream,1); 536 payloadBits += writeEnvelopeData (sbrEnvDataRight, hBitStream,1); 537 payloadBits += writeNoiseLevelData (sbrEnvDataRight, hBitStream,1); 538 539 payloadBits += writeSyntheticCodingData (sbrEnvDataLeft,hBitStream); 540 payloadBits += writeSyntheticCodingData (sbrEnvDataRight,hBitStream); 541 542 } else { /* no coupling */ 543 FDK_ASSERT(sbrEnvDataLeft->ldGrid == sbrEnvDataRight->ldGrid); 544 545 if (sbrEnvDataLeft->ldGrid || sbrEnvDataRight->ldGrid) { 546 /* sbrEnvDataLeft (left channel) */ 547 if ( sbrEnvDataLeft->hSbrBSGrid->frameClass != FIXFIXonly) { 548 /* no FIXFIXonly Frame so we dont need encodeLowDelaySbrGrid */ 549 /* normal SbrGrid */ 550 payloadBits += encodeSbrGrid (sbrEnvDataLeft, hBitStream); 551 552 } else { 553 /* FIXFIXonly frame Grid */ 554 payloadBits += encodeLowDelaySbrGrid ( sbrEnvDataLeft, hBitStream, encodeFreqs(LD_TRANSMISSION)); 555 } 556 557 /* sbrEnvDataRight (right channel) */ 558 if ( sbrEnvDataRight->hSbrBSGrid->frameClass != FIXFIXonly) { 559 /* no FIXFIXonly Frame so we dont need encodeLowDelaySbrGrid */ 560 /* normal SbrGrid */ 561 payloadBits += encodeSbrGrid (sbrEnvDataRight, hBitStream); 562 563 } else { 564 /* FIXFIXonly frame Grid */ 565 payloadBits += encodeLowDelaySbrGrid ( sbrEnvDataRight, hBitStream, encodeFreqs(LD_TRANSMISSION)); 566 } 567 } else 568 { 569 payloadBits += encodeSbrGrid (sbrEnvDataLeft, hBitStream); 570 payloadBits += encodeSbrGrid (sbrEnvDataRight, hBitStream); 571 } 572 payloadBits += encodeSbrDtdf (sbrEnvDataLeft, hBitStream); 573 payloadBits += encodeSbrDtdf (sbrEnvDataRight, hBitStream); 574 575 for (i = 0; i < sbrEnvDataLeft->noOfnoisebands; i++) { 576 payloadBits += FDKwriteBits (hBitStream, sbrEnvDataLeft->sbr_invf_mode_vec[i], 577 SI_SBR_INVF_MODE_BITS); 578 } 579 for (i = 0; i < sbrEnvDataRight->noOfnoisebands; i++) { 580 payloadBits += FDKwriteBits (hBitStream, sbrEnvDataRight->sbr_invf_mode_vec[i], 581 SI_SBR_INVF_MODE_BITS); 582 } 583 584 payloadBits += writeEnvelopeData (sbrEnvDataLeft, hBitStream,0); 585 payloadBits += writeEnvelopeData (sbrEnvDataRight, hBitStream,0); 586 payloadBits += writeNoiseLevelData (sbrEnvDataLeft, hBitStream,0); 587 payloadBits += writeNoiseLevelData (sbrEnvDataRight, hBitStream,0); 588 589 payloadBits += writeSyntheticCodingData (sbrEnvDataLeft,hBitStream); 590 payloadBits += writeSyntheticCodingData (sbrEnvDataRight,hBitStream); 591 592 } /* coupling */ 593 594 payloadBits += encodeExtendedData(hParametricStereo, hBitStream); 595 596 return payloadBits; 597 } 598 599 static INT ceil_ln2(INT x) 600 { 601 INT tmp=-1; 602 while((1<<++tmp) < x); 603 return(tmp); 604 } 605 606 607 /***************************************************************************** 608 609 functionname: encodeSbrGrid 610 description: if hBitStream != NULL writes bits that describes the 611 time/frequency grouping of a frame; else counts them only 612 returns: number of bits written or counted 613 input: 614 output: 615 616 *****************************************************************************/ 617 static INT 618 encodeSbrGrid (HANDLE_SBR_ENV_DATA sbrEnvData, HANDLE_FDK_BITSTREAM hBitStream) 619 { 620 INT payloadBits = 0; 621 INT i, temp; 622 INT bufferFrameStart = sbrEnvData->hSbrBSGrid->bufferFrameStart; 623 INT numberTimeSlots = sbrEnvData->hSbrBSGrid->numberTimeSlots; 624 625 if (sbrEnvData->ldGrid) 626 payloadBits += FDKwriteBits (hBitStream, 627 sbrEnvData->hSbrBSGrid->frameClass, 628 SBR_CLA_BITS_LD); 629 else 630 payloadBits += FDKwriteBits (hBitStream, 631 sbrEnvData->hSbrBSGrid->frameClass, 632 SBR_CLA_BITS); 633 634 switch (sbrEnvData->hSbrBSGrid->frameClass) { 635 case FIXFIXonly: 636 FDK_ASSERT(0 /* Fatal error in encodeSbrGrid! */); 637 break; 638 case FIXFIX: 639 temp = ceil_ln2(sbrEnvData->hSbrBSGrid->bs_num_env); 640 payloadBits += FDKwriteBits (hBitStream, temp, SBR_ENV_BITS); 641 if ((sbrEnvData->ldGrid) && (sbrEnvData->hSbrBSGrid->bs_num_env==1)) 642 payloadBits += FDKwriteBits(hBitStream, sbrEnvData->currentAmpResFF, SI_SBR_AMP_RES_BITS); 643 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->v_f[0], SBR_RES_BITS); 644 645 break; 646 647 case FIXVAR: 648 case VARFIX: 649 if (sbrEnvData->hSbrBSGrid->frameClass == FIXVAR) 650 temp = sbrEnvData->hSbrBSGrid->bs_abs_bord - (bufferFrameStart + numberTimeSlots); 651 else 652 temp = sbrEnvData->hSbrBSGrid->bs_abs_bord - bufferFrameStart; 653 654 payloadBits += FDKwriteBits (hBitStream, temp, SBR_ABS_BITS); 655 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->n, SBR_NUM_BITS); 656 657 for (i = 0; i < sbrEnvData->hSbrBSGrid->n; i++) { 658 temp = (sbrEnvData->hSbrBSGrid->bs_rel_bord[i] - 2) >> 1; 659 payloadBits += FDKwriteBits (hBitStream, temp, SBR_REL_BITS); 660 } 661 662 temp = ceil_ln2(sbrEnvData->hSbrBSGrid->n + 2); 663 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->p, temp); 664 665 for (i = 0; i < sbrEnvData->hSbrBSGrid->n + 1; i++) { 666 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->v_f[i], 667 SBR_RES_BITS); 668 } 669 break; 670 671 case VARVAR: 672 temp = sbrEnvData->hSbrBSGrid->bs_abs_bord_0 - bufferFrameStart; 673 payloadBits += FDKwriteBits (hBitStream, temp, SBR_ABS_BITS); 674 temp = sbrEnvData->hSbrBSGrid->bs_abs_bord_1 - (bufferFrameStart + numberTimeSlots); 675 payloadBits += FDKwriteBits (hBitStream, temp, SBR_ABS_BITS); 676 677 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->bs_num_rel_0, SBR_NUM_BITS); 678 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->bs_num_rel_1, SBR_NUM_BITS); 679 680 for (i = 0; i < sbrEnvData->hSbrBSGrid->bs_num_rel_0; i++) { 681 temp = (sbrEnvData->hSbrBSGrid->bs_rel_bord_0[i] - 2) >> 1; 682 payloadBits += FDKwriteBits (hBitStream, temp, SBR_REL_BITS); 683 } 684 685 for (i = 0; i < sbrEnvData->hSbrBSGrid->bs_num_rel_1; i++) { 686 temp = (sbrEnvData->hSbrBSGrid->bs_rel_bord_1[i] - 2) >> 1; 687 payloadBits += FDKwriteBits (hBitStream, temp, SBR_REL_BITS); 688 } 689 690 temp = ceil_ln2(sbrEnvData->hSbrBSGrid->bs_num_rel_0 + 691 sbrEnvData->hSbrBSGrid->bs_num_rel_1 + 2); 692 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->p, temp); 693 694 temp = sbrEnvData->hSbrBSGrid->bs_num_rel_0 + 695 sbrEnvData->hSbrBSGrid->bs_num_rel_1 + 1; 696 697 for (i = 0; i < temp; i++) { 698 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->v_fLR[i], 699 SBR_RES_BITS); 700 } 701 break; 702 } 703 704 return payloadBits; 705 } 706 707 #define SBR_CLA_BITS_LD 1 708 /***************************************************************************** 709 710 functionname: encodeLowDelaySbrGrid 711 description: if hBitStream != NULL writes bits that describes the 712 time/frequency grouping of a frame; 713 else counts them only 714 (this function only write the FIXFIXonly Bitstream data) 715 returns: number of bits written or counted 716 input: 717 output: 718 719 *****************************************************************************/ 720 static int 721 encodeLowDelaySbrGrid ( HANDLE_SBR_ENV_DATA sbrEnvData, 722 HANDLE_FDK_BITSTREAM hBitStream, 723 int transmitFreqs 724 ) 725 { 726 int payloadBits = 0; 727 int i; 728 729 /* write FIXFIXonly Grid */ 730 /* write frameClass [1 bit] for FIXFIXonly Grid */ 731 payloadBits += FDKwriteBits(hBitStream, 1, SBR_CLA_BITS_LD); 732 733 /* absolute Borders are fix: 0,X,X,X,nTimeSlots; so we dont have to transmit them */ 734 /* only transmit the transient position! */ 735 /* with this info (b1) we can reconstruct the Frame on Decoder side : */ 736 /* border[0] = 0; border[1] = b1; border[2]=b1+2; border[3] = nrTimeSlots */ 737 738 /* use 3 or 4bits for transient border (border) */ 739 if (sbrEnvData->hSbrBSGrid->numberTimeSlots == 8) 740 payloadBits += FDKwriteBits ( hBitStream, sbrEnvData->hSbrBSGrid->bs_abs_bord, 3); 741 else 742 payloadBits += FDKwriteBits ( hBitStream, sbrEnvData->hSbrBSGrid->bs_abs_bord, 4); 743 744 if (transmitFreqs) { 745 /* write FreqRes grid */ 746 for (i = 0; i < sbrEnvData->hSbrBSGrid->bs_num_env; i++) { 747 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->v_f[i], SBR_RES_BITS); 748 } 749 } 750 751 return payloadBits; 752 } 753 754 /***************************************************************************** 755 756 functionname: encodeSbrDtdf 757 description: writes bits that describes the direction of the envelopes of a frame 758 returns: number of bits written 759 input: 760 output: 761 762 *****************************************************************************/ 763 static INT 764 encodeSbrDtdf (HANDLE_SBR_ENV_DATA sbrEnvData, HANDLE_FDK_BITSTREAM hBitStream) 765 { 766 INT i, payloadBits = 0, noOfNoiseEnvelopes; 767 768 noOfNoiseEnvelopes = sbrEnvData->noOfEnvelopes > 1 ? 2 : 1; 769 770 for (i = 0; i < sbrEnvData->noOfEnvelopes; ++i) { 771 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->domain_vec[i], SBR_DIR_BITS); 772 } 773 for (i = 0; i < noOfNoiseEnvelopes; ++i) { 774 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->domain_vec_noise[i], SBR_DIR_BITS); 775 } 776 777 return payloadBits; 778 } 779 780 781 /***************************************************************************** 782 783 functionname: writeNoiseLevelData 784 description: writes bits corresponding to the noise-floor-level 785 returns: number of bits written 786 input: 787 output: 788 789 *****************************************************************************/ 790 static INT 791 writeNoiseLevelData (HANDLE_SBR_ENV_DATA sbrEnvData, HANDLE_FDK_BITSTREAM hBitStream, INT coupling) 792 { 793 INT j, i, payloadBits = 0; 794 INT nNoiseEnvelopes = sbrEnvData->noOfEnvelopes > 1 ? 2 : 1; 795 796 for (i = 0; i < nNoiseEnvelopes; i++) { 797 switch (sbrEnvData->domain_vec_noise[i]) { 798 case FREQ: 799 if (coupling && sbrEnvData->balance) { 800 payloadBits += FDKwriteBits (hBitStream, 801 sbrEnvData->sbr_noise_levels[i * sbrEnvData->noOfnoisebands], 802 sbrEnvData->si_sbr_start_noise_bits_balance); 803 } else { 804 payloadBits += FDKwriteBits (hBitStream, 805 sbrEnvData->sbr_noise_levels[i * sbrEnvData->noOfnoisebands], 806 sbrEnvData->si_sbr_start_noise_bits); 807 } 808 809 for (j = 1 + i * sbrEnvData->noOfnoisebands; j < (sbrEnvData->noOfnoisebands * (1 + i)); j++) { 810 if (coupling) { 811 if (sbrEnvData->balance) { 812 /* coupling && balance */ 813 payloadBits += FDKwriteBits (hBitStream, 814 sbrEnvData->hufftableNoiseBalanceFreqC[sbrEnvData->sbr_noise_levels[j] + 815 CODE_BOOK_SCF_LAV_BALANCE11], 816 sbrEnvData->hufftableNoiseBalanceFreqL[sbrEnvData->sbr_noise_levels[j] + 817 CODE_BOOK_SCF_LAV_BALANCE11]); 818 } else { 819 /* coupling && !balance */ 820 payloadBits += FDKwriteBits (hBitStream, 821 sbrEnvData->hufftableNoiseLevelFreqC[sbrEnvData->sbr_noise_levels[j] + 822 CODE_BOOK_SCF_LAV11], 823 sbrEnvData->hufftableNoiseLevelFreqL[sbrEnvData->sbr_noise_levels[j] + 824 CODE_BOOK_SCF_LAV11]); 825 } 826 } else { 827 /* !coupling */ 828 payloadBits += FDKwriteBits (hBitStream, 829 sbrEnvData->hufftableNoiseFreqC[sbrEnvData->sbr_noise_levels[j] + 830 CODE_BOOK_SCF_LAV11], 831 sbrEnvData->hufftableNoiseFreqL[sbrEnvData->sbr_noise_levels[j] + 832 CODE_BOOK_SCF_LAV11]); 833 } 834 } 835 break; 836 837 case TIME: 838 for (j = i * sbrEnvData->noOfnoisebands; j < (sbrEnvData->noOfnoisebands * (1 + i)); j++) { 839 if (coupling) { 840 if (sbrEnvData->balance) { 841 /* coupling && balance */ 842 payloadBits += FDKwriteBits (hBitStream, 843 sbrEnvData->hufftableNoiseBalanceTimeC[sbrEnvData->sbr_noise_levels[j] + 844 CODE_BOOK_SCF_LAV_BALANCE11], 845 sbrEnvData->hufftableNoiseBalanceTimeL[sbrEnvData->sbr_noise_levels[j] + 846 CODE_BOOK_SCF_LAV_BALANCE11]); 847 } else { 848 /* coupling && !balance */ 849 payloadBits += FDKwriteBits (hBitStream, 850 sbrEnvData->hufftableNoiseLevelTimeC[sbrEnvData->sbr_noise_levels[j] + 851 CODE_BOOK_SCF_LAV11], 852 sbrEnvData->hufftableNoiseLevelTimeL[sbrEnvData->sbr_noise_levels[j] + 853 CODE_BOOK_SCF_LAV11]); 854 } 855 } else { 856 /* !coupling */ 857 payloadBits += FDKwriteBits (hBitStream, 858 sbrEnvData->hufftableNoiseLevelTimeC[sbrEnvData->sbr_noise_levels[j] + 859 CODE_BOOK_SCF_LAV11], 860 sbrEnvData->hufftableNoiseLevelTimeL[sbrEnvData->sbr_noise_levels[j] + 861 CODE_BOOK_SCF_LAV11]); 862 } 863 } 864 break; 865 } 866 } 867 return payloadBits; 868 } 869 870 871 /***************************************************************************** 872 873 functionname: writeEnvelopeData 874 description: writes bits corresponding to the envelope 875 returns: number of bits written 876 input: 877 output: 878 879 *****************************************************************************/ 880 static INT 881 writeEnvelopeData (HANDLE_SBR_ENV_DATA sbrEnvData, HANDLE_FDK_BITSTREAM hBitStream, INT coupling) 882 { 883 INT payloadBits = 0, j, i, delta; 884 885 for (j = 0; j < sbrEnvData->noOfEnvelopes; j++) { /* loop over all envelopes */ 886 if (sbrEnvData->domain_vec[j] == FREQ) { 887 if (coupling && sbrEnvData->balance) { 888 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->ienvelope[j][0], sbrEnvData->si_sbr_start_env_bits_balance); 889 } else { 890 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->ienvelope[j][0], sbrEnvData->si_sbr_start_env_bits); 891 } 892 } 893 894 for (i = 1 - sbrEnvData->domain_vec[j]; i < sbrEnvData->noScfBands[j]; i++) { 895 delta = sbrEnvData->ienvelope[j][i]; 896 if (coupling && sbrEnvData->balance) { 897 FDK_ASSERT (fixp_abs (delta) <= sbrEnvData->codeBookScfLavBalance); 898 } else { 899 FDK_ASSERT (fixp_abs (delta) <= sbrEnvData->codeBookScfLav); 900 } 901 if (coupling) { 902 if (sbrEnvData->balance) { 903 if (sbrEnvData->domain_vec[j]) { 904 /* coupling && balance && TIME */ 905 payloadBits += FDKwriteBits (hBitStream, 906 sbrEnvData->hufftableBalanceTimeC[delta + sbrEnvData->codeBookScfLavBalance], 907 sbrEnvData->hufftableBalanceTimeL[delta + sbrEnvData->codeBookScfLavBalance]); 908 } else { 909 /* coupling && balance && FREQ */ 910 payloadBits += FDKwriteBits (hBitStream, 911 sbrEnvData->hufftableBalanceFreqC[delta + sbrEnvData->codeBookScfLavBalance], 912 sbrEnvData->hufftableBalanceFreqL[delta + sbrEnvData->codeBookScfLavBalance]); 913 } 914 } else { 915 if (sbrEnvData->domain_vec[j]) { 916 /* coupling && !balance && TIME */ 917 payloadBits += FDKwriteBits (hBitStream, 918 sbrEnvData->hufftableLevelTimeC[delta + sbrEnvData->codeBookScfLav], 919 sbrEnvData->hufftableLevelTimeL[delta + sbrEnvData->codeBookScfLav]); 920 } else { 921 /* coupling && !balance && FREQ */ 922 payloadBits += FDKwriteBits (hBitStream, 923 sbrEnvData->hufftableLevelFreqC[delta + sbrEnvData->codeBookScfLav], 924 sbrEnvData->hufftableLevelFreqL[delta + sbrEnvData->codeBookScfLav]); 925 } 926 } 927 } else { 928 if (sbrEnvData->domain_vec[j]) { 929 /* !coupling && TIME */ 930 payloadBits += FDKwriteBits (hBitStream, 931 sbrEnvData->hufftableTimeC[delta + sbrEnvData->codeBookScfLav], 932 sbrEnvData->hufftableTimeL[delta + sbrEnvData->codeBookScfLav]); 933 } else { 934 /* !coupling && FREQ */ 935 payloadBits += FDKwriteBits (hBitStream, 936 sbrEnvData->hufftableFreqC[delta + sbrEnvData->codeBookScfLav], 937 sbrEnvData->hufftableFreqL[delta + sbrEnvData->codeBookScfLav]); 938 } 939 } 940 } 941 } 942 return payloadBits; 943 } 944 945 946 /***************************************************************************** 947 948 functionname: encodeExtendedData 949 description: writes bits corresponding to the extended data 950 returns: number of bits written 951 input: 952 output: 953 954 *****************************************************************************/ 955 static INT encodeExtendedData (HANDLE_PARAMETRIC_STEREO hParametricStereo, 956 HANDLE_FDK_BITSTREAM hBitStream) 957 { 958 INT extDataSize; 959 INT payloadBits = 0; 960 961 extDataSize = getSbrExtendedDataSize(hParametricStereo); 962 963 964 if (extDataSize != 0) { 965 INT maxExtSize = (1<<SI_SBR_EXTENSION_SIZE_BITS) - 1; 966 INT writtenNoBits = 0; /* needed to byte align the extended data */ 967 968 payloadBits += FDKwriteBits (hBitStream, 1, SI_SBR_EXTENDED_DATA_BITS); 969 FDK_ASSERT(extDataSize <= SBR_EXTENDED_DATA_MAX_CNT); 970 971 if (extDataSize < maxExtSize) { 972 payloadBits += FDKwriteBits (hBitStream, extDataSize, SI_SBR_EXTENSION_SIZE_BITS); 973 } else { 974 payloadBits += FDKwriteBits (hBitStream, maxExtSize, SI_SBR_EXTENSION_SIZE_BITS); 975 payloadBits += FDKwriteBits (hBitStream, extDataSize - maxExtSize, SI_SBR_EXTENSION_ESC_COUNT_BITS); 976 } 977 978 /* parametric coding signalled here? */ 979 if(hParametricStereo){ 980 writtenNoBits += FDKwriteBits (hBitStream, EXTENSION_ID_PS_CODING, SI_SBR_EXTENSION_ID_BITS); 981 writtenNoBits += FDKsbrEnc_PSEnc_WritePSData(hParametricStereo, hBitStream); 982 } 983 984 payloadBits += writtenNoBits; 985 986 /* byte alignment */ 987 writtenNoBits = writtenNoBits%8; 988 if(writtenNoBits) 989 payloadBits += FDKwriteBits(hBitStream, 0, (8 - writtenNoBits)); 990 } else { 991 payloadBits += FDKwriteBits (hBitStream, 0, SI_SBR_EXTENDED_DATA_BITS); 992 } 993 994 return payloadBits; 995 } 996 997 998 /***************************************************************************** 999 1000 functionname: writeSyntheticCodingData 1001 description: writes bits corresponding to the "synthetic-coding"-extension 1002 returns: number of bits written 1003 input: 1004 output: 1005 1006 *****************************************************************************/ 1007 static INT writeSyntheticCodingData (HANDLE_SBR_ENV_DATA sbrEnvData, 1008 HANDLE_FDK_BITSTREAM hBitStream) 1009 1010 { 1011 INT i; 1012 INT payloadBits = 0; 1013 1014 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->addHarmonicFlag, 1); 1015 1016 if (sbrEnvData->addHarmonicFlag) { 1017 for (i = 0; i < sbrEnvData->noHarmonics; i++) { 1018 payloadBits += FDKwriteBits (hBitStream, sbrEnvData->addHarmonic[i], 1); 1019 } 1020 } 1021 1022 return payloadBits; 1023 } 1024 1025 /***************************************************************************** 1026 1027 functionname: getSbrExtendedDataSize 1028 description: counts the number of bits needed for encoding the 1029 extended data (including extension id) 1030 1031 returns: number of bits needed for the extended data 1032 input: 1033 output: 1034 1035 *****************************************************************************/ 1036 static INT 1037 getSbrExtendedDataSize (HANDLE_PARAMETRIC_STEREO hParametricStereo) 1038 { 1039 INT extDataBits = 0; 1040 1041 /* add your new extended data counting methods here */ 1042 1043 /* 1044 no extended data 1045 */ 1046 1047 if(hParametricStereo){ 1048 /* PS extended data */ 1049 extDataBits += SI_SBR_EXTENSION_ID_BITS; 1050 extDataBits += FDKsbrEnc_PSEnc_WritePSData(hParametricStereo, NULL); 1051 } 1052 1053 return (extDataBits+7) >> 3; 1054 } 1055 1056 1057 1058 1059 1060
