1 2 /* ----------------------------------------------------------------------------------------------------------- 3 Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5 Copyright 1995 - 2015 Fraunhofer-Gesellschaft zur Frderung der angewandten Forschung e.V. 6 All rights reserved. 7 8 1. INTRODUCTION 9 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements 10 the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. 11 This FDK AAC Codec software is intended to be used on a wide variety of Android devices. 12 13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual 14 audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by 15 independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part 16 of the MPEG specifications. 17 18 Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) 19 may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners 20 individually for the purpose of encoding or decoding bit streams in products that are compliant with 21 the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license 22 these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec 23 software may already be covered under those patent licenses when it is used for those licensed purposes only. 24 25 Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, 26 are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional 27 applications information and documentation. 28 29 2. COPYRIGHT LICENSE 30 31 Redistribution and use in source and binary forms, with or without modification, are permitted without 32 payment of copyright license fees provided that you satisfy the following conditions: 33 34 You must retain the complete text of this software license in redistributions of the FDK AAC Codec or 35 your modifications thereto in source code form. 36 37 You must retain the complete text of this software license in the documentation and/or other materials 38 provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. 39 You must make available free of charge copies of the complete source code of the FDK AAC Codec and your 40 modifications thereto to recipients of copies in binary form. 41 42 The name of Fraunhofer may not be used to endorse or promote products derived from this library without 43 prior written permission. 44 45 You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec 46 software or your modifications thereto. 47 48 Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software 49 and the date of any change. For modified versions of the FDK AAC Codec, the term 50 "Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term 51 "Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." 52 53 3. NO PATENT LICENSE 54 55 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, 56 ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with 57 respect to this software. 58 59 You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized 60 by appropriate patent licenses. 61 62 4. DISCLAIMER 63 64 This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors 65 "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties 66 of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 67 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, 68 including but not limited to procurement of substitute goods or services; loss of use, data, or profits, 69 or business interruption, however caused and on any theory of liability, whether in contract, strict 70 liability, or tort (including negligence), arising in any way out of the use of this software, even if 71 advised of the possibility of such damage. 72 73 5. CONTACT INFORMATION 74 75 Fraunhofer Institute for Integrated Circuits IIS 76 Attention: Audio and Multimedia Departments - FDK AAC LL 77 Am Wolfsmantel 33 78 91058 Erlangen, Germany 79 80 www.iis.fraunhofer.de/amm 81 amm-info (at) iis.fraunhofer.de 82 ----------------------------------------------------------------------------------------------------------- */ 83 84 /***************************** MPEG Audio Encoder *************************** 85 86 Initial author: N. Rettelbach 87 contents/description: Parametric Stereo bitstream encoder 88 89 ******************************************************************************/ 90 91 #include "ps_main.h" 92 93 94 #include "ps_const.h" 95 #include "ps_bitenc.h" 96 97 static 98 inline UCHAR FDKsbrEnc_WriteBits_ps(HANDLE_FDK_BITSTREAM hBitStream, UINT value, 99 const UINT numberOfBits) 100 { 101 /* hBitStream == NULL happens here intentionally */ 102 if(hBitStream!=NULL){ 103 FDKwriteBits(hBitStream, value, numberOfBits); 104 } 105 return numberOfBits; 106 } 107 108 #define SI_SBR_EXTENSION_SIZE_BITS 4 109 #define SI_SBR_EXTENSION_ESC_COUNT_BITS 8 110 #define SI_SBR_EXTENSION_ID_BITS 2 111 #define EXTENSION_ID_PS_CODING 2 112 #define PS_EXT_ID_V0 0 113 114 static const INT iidDeltaCoarse_Offset = 14; 115 static const INT iidDeltaCoarse_MaxVal = 28; 116 static const INT iidDeltaFine_Offset = 30; 117 static const INT iidDeltaFine_MaxVal = 60; 118 119 /* PS Stereo Huffmantable: iidDeltaFreqCoarse */ 120 static const UINT iidDeltaFreqCoarse_Length[] = 121 { 122 17, 17, 17, 17, 16, 15, 13, 10, 9, 7, 123 6, 5, 4, 3, 1, 3, 4, 5, 6, 6, 124 8, 11, 13, 14, 14, 15, 17, 18, 18 125 }; 126 static const UINT iidDeltaFreqCoarse_Code[] = 127 { 128 0x0001fffb, 0x0001fffc, 0x0001fffd, 0x0001fffa, 0x0000fffc, 0x00007ffc, 0x00001ffd, 0x000003fe, 0x000001fe, 0x0000007e, 129 0x0000003c, 0x0000001d, 0x0000000d, 0x00000005, 0000000000, 0x00000004, 0x0000000c, 0x0000001c, 0x0000003d, 0x0000003e, 130 0x000000fe, 0x000007fe, 0x00001ffc, 0x00003ffc, 0x00003ffd, 0x00007ffd, 0x0001fffe, 0x0003fffe, 0x0003ffff 131 }; 132 133 /* PS Stereo Huffmantable: iidDeltaFreqFine */ 134 static const UINT iidDeltaFreqFine_Length[] = 135 { 136 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 137 18, 17, 17, 16, 16, 15, 14, 14, 13, 12, 138 12, 11, 10, 10, 8, 7, 6, 5, 4, 3, 139 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 140 11, 12, 13, 14, 14, 15, 16, 16, 17, 17, 141 18, 17, 18, 18, 18, 18, 18, 18, 18, 18, 142 18 143 }; 144 static const UINT iidDeltaFreqFine_Code[] = 145 { 146 0x0001feb4, 0x0001feb5, 0x0001fd76, 0x0001fd77, 0x0001fd74, 0x0001fd75, 0x0001fe8a, 0x0001fe8b, 0x0001fe88, 0x0000fe80, 147 0x0001feb6, 0x0000fe82, 0x0000feb8, 0x00007f42, 0x00007fae, 0x00003faf, 0x00001fd1, 0x00001fe9, 0x00000fe9, 0x000007ea, 148 0x000007fb, 0x000003fb, 0x000001fb, 0x000001ff, 0x0000007c, 0x0000003c, 0x0000001c, 0x0000000c, 0000000000, 0x00000001, 149 0x00000001, 0x00000002, 0x00000001, 0x0000000d, 0x0000001d, 0x0000003d, 0x0000007d, 0x000000fc, 0x000001fc, 0x000003fc, 150 0x000003f4, 0x000007eb, 0x00000fea, 0x00001fea, 0x00001fd6, 0x00003fd0, 0x00007faf, 0x00007f43, 0x0000feb9, 0x0000fe83, 151 0x0001feb7, 0x0000fe81, 0x0001fe89, 0x0001fe8e, 0x0001fe8f, 0x0001fe8c, 0x0001fe8d, 0x0001feb2, 0x0001feb3, 0x0001feb0, 152 0x0001feb1 153 }; 154 155 /* PS Stereo Huffmantable: iidDeltaTimeCoarse */ 156 static const UINT iidDeltaTimeCoarse_Length[] = 157 { 158 19, 19, 19, 20, 20, 20, 17, 15, 12, 10, 159 8, 6, 4, 2, 1, 3, 5, 7, 9, 11, 160 13, 14, 17, 19, 20, 20, 20, 20, 20 161 }; 162 static const UINT iidDeltaTimeCoarse_Code[] = 163 { 164 0x0007fff9, 0x0007fffa, 0x0007fffb, 0x000ffff8, 0x000ffff9, 0x000ffffa, 0x0001fffd, 0x00007ffe, 0x00000ffe, 0x000003fe, 165 0x000000fe, 0x0000003e, 0x0000000e, 0x00000002, 0000000000, 0x00000006, 0x0000001e, 0x0000007e, 0x000001fe, 0x000007fe, 166 0x00001ffe, 0x00003ffe, 0x0001fffc, 0x0007fff8, 0x000ffffb, 0x000ffffc, 0x000ffffd, 0x000ffffe, 0x000fffff 167 }; 168 169 /* PS Stereo Huffmantable: iidDeltaTimeFine */ 170 static const UINT iidDeltaTimeFine_Length[] = 171 { 172 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 173 15, 15, 15, 15, 15, 14, 14, 13, 13, 13, 174 12, 12, 11, 10, 9, 9, 7, 6, 5, 3, 175 1, 2, 5, 6, 7, 8, 9, 10, 11, 11, 176 12, 12, 13, 13, 14, 14, 15, 15, 15, 15, 177 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 178 16 179 }; 180 static const UINT iidDeltaTimeFine_Code[] = 181 { 182 0x00004ed4, 0x00004ed5, 0x00004ece, 0x00004ecf, 0x00004ecc, 0x00004ed6, 0x00004ed8, 0x00004f46, 0x00004f60, 0x00002718, 183 0x00002719, 0x00002764, 0x00002765, 0x0000276d, 0x000027b1, 0x000013b7, 0x000013d6, 0x000009c7, 0x000009e9, 0x000009ed, 184 0x000004ee, 0x000004f7, 0x00000278, 0x00000139, 0x0000009a, 0x0000009f, 0x00000020, 0x00000011, 0x0000000a, 0x00000003, 185 0x00000001, 0000000000, 0x0000000b, 0x00000012, 0x00000021, 0x0000004c, 0x0000009b, 0x0000013a, 0x00000279, 0x00000270, 186 0x000004ef, 0x000004e2, 0x000009ea, 0x000009d8, 0x000013d7, 0x000013d0, 0x000027b2, 0x000027a2, 0x0000271a, 0x0000271b, 187 0x00004f66, 0x00004f67, 0x00004f61, 0x00004f47, 0x00004ed9, 0x00004ed7, 0x00004ecd, 0x00004ed2, 0x00004ed3, 0x00004ed0, 188 0x00004ed1 189 }; 190 191 static const INT iccDelta_Offset = 7; 192 static const INT iccDelta_MaxVal = 14; 193 /* PS Stereo Huffmantable: iccDeltaFreq */ 194 static const UINT iccDeltaFreq_Length[] = 195 { 196 14, 14, 12, 10, 7, 5, 3, 1, 2, 4, 197 6, 8, 9, 11, 13 198 }; 199 static const UINT iccDeltaFreq_Code[] = 200 { 201 0x00003fff, 0x00003ffe, 0x00000ffe, 0x000003fe, 0x0000007e, 0x0000001e, 0x00000006, 0000000000, 0x00000002, 0x0000000e, 202 0x0000003e, 0x000000fe, 0x000001fe, 0x000007fe, 0x00001ffe 203 }; 204 205 /* PS Stereo Huffmantable: iccDeltaTime */ 206 static const UINT iccDeltaTime_Length[] = 207 { 208 14, 13, 11, 9, 7, 5, 3, 1, 2, 4, 209 6, 8, 10, 12, 14 210 }; 211 static const UINT iccDeltaTime_Code[] = 212 { 213 0x00003ffe, 0x00001ffe, 0x000007fe, 0x000001fe, 0x0000007e, 0x0000001e, 0x00000006, 0000000000, 0x00000002, 0x0000000e, 214 0x0000003e, 0x000000fe, 0x000003fe, 0x00000ffe, 0x00003fff 215 }; 216 217 218 219 static const INT ipdDelta_Offset = 0; 220 static const INT ipdDelta_MaxVal = 7; 221 /* PS Stereo Huffmantable: ipdDeltaFreq */ 222 static const UINT ipdDeltaFreq_Length[] = 223 { 224 1, 3, 4, 4, 4, 4, 4, 4 225 }; 226 static const UINT ipdDeltaFreq_Code[] = 227 { 228 0x00000001, 0000000000, 0x00000006, 0x00000004, 0x00000002, 0x00000003, 0x00000005, 0x00000007 229 }; 230 231 /* PS Stereo Huffmantable: ipdDeltaTime */ 232 static const UINT ipdDeltaTime_Length[] = 233 { 234 1, 3, 4, 5, 5, 4, 4, 3 235 }; 236 static const UINT ipdDeltaTime_Code[] = 237 { 238 0x00000001, 0x00000002, 0x00000002, 0x00000003, 0x00000002, 0000000000, 0x00000003, 0x00000003 239 }; 240 241 242 static const INT opdDelta_Offset = 0; 243 static const INT opdDelta_MaxVal = 7; 244 /* PS Stereo Huffmantable: opdDeltaFreq */ 245 static const UINT opdDeltaFreq_Length[] = 246 { 247 1, 3, 4, 4, 5, 5, 4, 3 248 }; 249 static const UINT opdDeltaFreq_Code[] = 250 { 251 0x00000001, 0x00000001, 0x00000006, 0x00000004, 0x0000000f, 0x0000000e, 0x00000005, 0000000000, 252 }; 253 254 /* PS Stereo Huffmantable: opdDeltaTime */ 255 static const UINT opdDeltaTime_Length[] = 256 { 257 1, 3, 4, 5, 5, 4, 4, 3 258 }; 259 static const UINT opdDeltaTime_Code[] = 260 { 261 0x00000001, 0x00000002, 0x00000001, 0x00000007, 0x00000006, 0000000000, 0x00000002, 0x00000003 262 }; 263 264 static INT getNoBands(const INT mode) 265 { 266 INT noBands = 0; 267 268 switch (mode) { 269 case 0: case 3: /* coarse */ 270 noBands = PS_BANDS_COARSE; 271 break; 272 case 1: case 4: /* mid */ 273 noBands = PS_BANDS_MID; 274 break; 275 case 2: case 5: /* fine not supported */ 276 default: /* coarse as default */ 277 noBands = PS_BANDS_COARSE; 278 } 279 280 return noBands; 281 } 282 283 static INT getIIDRes(INT iidMode) 284 { 285 if(iidMode<3) 286 return PS_IID_RES_COARSE; 287 else 288 return PS_IID_RES_FINE; 289 } 290 291 static INT 292 encodeDeltaFreq(HANDLE_FDK_BITSTREAM hBitBuf, 293 const INT *val, 294 const INT nBands, 295 const UINT *codeTable, 296 const UINT *lengthTable, 297 const INT tableOffset, 298 const INT maxVal, 299 INT *error) 300 { 301 INT bitCnt = 0; 302 INT lastVal = 0; 303 INT band; 304 305 for(band=0;band<nBands;band++) { 306 INT delta = (val[band] - lastVal) + tableOffset; 307 lastVal = val[band]; 308 if( (delta>maxVal) || (delta<0) ) { 309 *error = 1; 310 delta = delta>0?maxVal:0; 311 } 312 bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, codeTable[delta], lengthTable[delta]); 313 } 314 315 return bitCnt; 316 } 317 318 static INT 319 encodeDeltaTime(HANDLE_FDK_BITSTREAM hBitBuf, 320 const INT *val, 321 const INT *valLast, 322 const INT nBands, 323 const UINT *codeTable, 324 const UINT *lengthTable, 325 const INT tableOffset, 326 const INT maxVal, 327 INT *error) 328 { 329 INT bitCnt = 0; 330 INT band; 331 332 for(band=0;band<nBands;band++) { 333 INT delta = (val[band] - valLast[band]) + tableOffset; 334 if( (delta>maxVal) || (delta<0) ) { 335 *error = 1; 336 delta = delta>0?maxVal:0; 337 } 338 bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, codeTable[delta], lengthTable[delta]); 339 } 340 341 return bitCnt; 342 } 343 344 INT FDKsbrEnc_EncodeIid(HANDLE_FDK_BITSTREAM hBitBuf, 345 const INT *iidVal, 346 const INT *iidValLast, 347 const INT nBands, 348 const PS_IID_RESOLUTION res, 349 const PS_DELTA mode, 350 INT *error) 351 { 352 const UINT *codeTable; 353 const UINT *lengthTable; 354 INT bitCnt = 0; 355 356 bitCnt = 0; 357 358 switch(mode) { 359 case PS_DELTA_FREQ: 360 switch(res) { 361 case PS_IID_RES_COARSE: 362 codeTable = iidDeltaFreqCoarse_Code; 363 lengthTable = iidDeltaFreqCoarse_Length; 364 bitCnt += encodeDeltaFreq(hBitBuf, iidVal, nBands, codeTable, 365 lengthTable, iidDeltaCoarse_Offset, 366 iidDeltaCoarse_MaxVal, error); 367 break; 368 case PS_IID_RES_FINE: 369 codeTable = iidDeltaFreqFine_Code; 370 lengthTable = iidDeltaFreqFine_Length; 371 bitCnt += encodeDeltaFreq(hBitBuf, iidVal, nBands, codeTable, 372 lengthTable, iidDeltaFine_Offset, 373 iidDeltaFine_MaxVal, error); 374 break; 375 default: 376 *error = 1; 377 } 378 break; 379 380 case PS_DELTA_TIME: 381 switch(res) { 382 case PS_IID_RES_COARSE: 383 codeTable = iidDeltaTimeCoarse_Code; 384 lengthTable = iidDeltaTimeCoarse_Length; 385 bitCnt += encodeDeltaTime(hBitBuf, iidVal, iidValLast, nBands, codeTable, 386 lengthTable, iidDeltaCoarse_Offset, 387 iidDeltaCoarse_MaxVal, error); 388 break; 389 case PS_IID_RES_FINE: 390 codeTable = iidDeltaTimeFine_Code; 391 lengthTable = iidDeltaTimeFine_Length; 392 bitCnt += encodeDeltaTime(hBitBuf, iidVal, iidValLast, nBands, codeTable, 393 lengthTable, iidDeltaFine_Offset, 394 iidDeltaFine_MaxVal, error); 395 break; 396 default: 397 *error = 1; 398 } 399 break; 400 401 default: 402 *error = 1; 403 } 404 405 return bitCnt; 406 } 407 408 409 INT FDKsbrEnc_EncodeIcc(HANDLE_FDK_BITSTREAM hBitBuf, 410 const INT *iccVal, 411 const INT *iccValLast, 412 const INT nBands, 413 const PS_DELTA mode, 414 INT *error) 415 { 416 const UINT *codeTable; 417 const UINT *lengthTable; 418 INT bitCnt = 0; 419 420 switch(mode) { 421 case PS_DELTA_FREQ: 422 codeTable = iccDeltaFreq_Code; 423 lengthTable = iccDeltaFreq_Length; 424 bitCnt += encodeDeltaFreq(hBitBuf, iccVal, nBands, codeTable, 425 lengthTable, iccDelta_Offset, iccDelta_MaxVal, error); 426 break; 427 428 case PS_DELTA_TIME: 429 codeTable = iccDeltaTime_Code; 430 lengthTable = iccDeltaTime_Length; 431 432 bitCnt += encodeDeltaTime(hBitBuf, iccVal, iccValLast, nBands, codeTable, 433 lengthTable, iccDelta_Offset, iccDelta_MaxVal, error); 434 break; 435 436 default: 437 *error = 1; 438 } 439 440 return bitCnt; 441 } 442 443 INT FDKsbrEnc_EncodeIpd(HANDLE_FDK_BITSTREAM hBitBuf, 444 const INT *ipdVal, 445 const INT *ipdValLast, 446 const INT nBands, 447 const PS_DELTA mode, 448 INT *error) 449 { 450 const UINT *codeTable; 451 const UINT *lengthTable; 452 INT bitCnt = 0; 453 454 switch(mode) { 455 case PS_DELTA_FREQ: 456 codeTable = ipdDeltaFreq_Code; 457 lengthTable = ipdDeltaFreq_Length; 458 bitCnt += encodeDeltaFreq(hBitBuf, ipdVal, nBands, codeTable, 459 lengthTable, ipdDelta_Offset, ipdDelta_MaxVal, error); 460 break; 461 462 case PS_DELTA_TIME: 463 codeTable = ipdDeltaTime_Code; 464 lengthTable = ipdDeltaTime_Length; 465 466 bitCnt += encodeDeltaTime(hBitBuf, ipdVal, ipdValLast, nBands, codeTable, 467 lengthTable, ipdDelta_Offset, ipdDelta_MaxVal, error); 468 break; 469 470 default: 471 *error = 1; 472 } 473 474 return bitCnt; 475 } 476 477 INT FDKsbrEnc_EncodeOpd(HANDLE_FDK_BITSTREAM hBitBuf, 478 const INT *opdVal, 479 const INT *opdValLast, 480 const INT nBands, 481 const PS_DELTA mode, 482 INT *error) 483 { 484 const UINT *codeTable; 485 const UINT *lengthTable; 486 INT bitCnt = 0; 487 488 switch(mode) { 489 case PS_DELTA_FREQ: 490 codeTable = opdDeltaFreq_Code; 491 lengthTable = opdDeltaFreq_Length; 492 bitCnt += encodeDeltaFreq(hBitBuf, opdVal, nBands, codeTable, 493 lengthTable, opdDelta_Offset, opdDelta_MaxVal, error); 494 break; 495 496 case PS_DELTA_TIME: 497 codeTable = opdDeltaTime_Code; 498 lengthTable = opdDeltaTime_Length; 499 500 bitCnt += encodeDeltaTime(hBitBuf, opdVal, opdValLast, nBands, codeTable, 501 lengthTable, opdDelta_Offset, opdDelta_MaxVal, error); 502 break; 503 504 default: 505 *error = 1; 506 } 507 508 return bitCnt; 509 } 510 511 static INT encodeIpdOpd(HANDLE_PS_OUT psOut, 512 HANDLE_FDK_BITSTREAM hBitBuf ) 513 { 514 INT bitCnt = 0; 515 INT error = 0; 516 INT env; 517 518 FDKsbrEnc_WriteBits_ps(hBitBuf, psOut->enableIpdOpd, 1); 519 520 if(psOut->enableIpdOpd==1) { 521 INT *ipdLast = psOut->ipdLast; 522 INT *opdLast = psOut->opdLast; 523 524 for(env=0; env<psOut->nEnvelopes; env++) { 525 bitCnt += FDKsbrEnc_WriteBits_ps( hBitBuf, psOut->deltaIPD[env], 1); 526 bitCnt += FDKsbrEnc_EncodeIpd( hBitBuf, 527 psOut->ipd[env], 528 ipdLast, 529 getNoBands(psOut->iidMode), 530 psOut->deltaIPD[env], 531 &error); 532 533 bitCnt += FDKsbrEnc_WriteBits_ps( hBitBuf, psOut->deltaOPD[env], 1); 534 bitCnt += FDKsbrEnc_EncodeOpd( hBitBuf, 535 psOut->opd[env], 536 opdLast, 537 getNoBands(psOut->iidMode), 538 psOut->deltaOPD[env], 539 &error ); 540 } 541 /* reserved bit */ 542 bitCnt += FDKsbrEnc_WriteBits_ps( hBitBuf, 0, 1); 543 } 544 545 546 return bitCnt; 547 } 548 549 static INT getEnvIdx(const INT nEnvelopes, const INT frameClass) 550 { 551 INT envIdx = 0; 552 553 switch(nEnvelopes) { 554 case 0: 555 envIdx = 0; 556 break; 557 558 case 1: 559 if (frameClass==0) 560 envIdx = 1; 561 else 562 envIdx = 0; 563 break; 564 565 case 2: 566 if (frameClass==0) 567 envIdx = 2; 568 else 569 envIdx = 1; 570 break; 571 572 case 3: 573 envIdx = 2; 574 break; 575 576 case 4: 577 envIdx = 3; 578 break; 579 580 default: 581 /* unsupported number of envelopes */ 582 envIdx = 0; 583 } 584 585 return envIdx; 586 } 587 588 589 static INT encodePSExtension(const HANDLE_PS_OUT psOut, 590 HANDLE_FDK_BITSTREAM hBitBuf ) 591 { 592 INT bitCnt = 0; 593 594 if(psOut->enableIpdOpd==1) { 595 INT ipdOpdBits = 0; 596 INT extSize = (2 + encodeIpdOpd(psOut,NULL)+7)>>3; 597 598 if(extSize<15) { 599 bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, extSize, 4); 600 } 601 else { 602 bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, 15 , 4); 603 bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, (extSize-15), 8); 604 } 605 606 /* write ipd opd data */ 607 ipdOpdBits += FDKsbrEnc_WriteBits_ps(hBitBuf, PS_EXT_ID_V0, 2); 608 ipdOpdBits += encodeIpdOpd(psOut, hBitBuf ); 609 610 /* byte align the ipd opd data */ 611 if(ipdOpdBits%8) 612 ipdOpdBits += FDKsbrEnc_WriteBits_ps(hBitBuf, 0, (8-(ipdOpdBits%8)) ); 613 614 bitCnt += ipdOpdBits; 615 } 616 617 return (bitCnt); 618 } 619 620 INT FDKsbrEnc_WritePSBitstream(const HANDLE_PS_OUT psOut, 621 HANDLE_FDK_BITSTREAM hBitBuf ) 622 { 623 INT psExtEnable = 0; 624 INT bitCnt = 0; 625 INT error = 0; 626 INT env; 627 628 if(psOut != NULL){ 629 630 /* PS HEADER */ 631 bitCnt += FDKsbrEnc_WriteBits_ps( hBitBuf, psOut->enablePSHeader, 1); 632 633 if(psOut->enablePSHeader) { 634 635 bitCnt += FDKsbrEnc_WriteBits_ps( hBitBuf, psOut->enableIID, 1); 636 if(psOut->enableIID) { 637 bitCnt += FDKsbrEnc_WriteBits_ps( hBitBuf, psOut->iidMode, 3); 638 } 639 bitCnt += FDKsbrEnc_WriteBits_ps( hBitBuf, psOut->enableICC, 1); 640 if(psOut->enableICC) { 641 bitCnt += FDKsbrEnc_WriteBits_ps( hBitBuf, psOut->iccMode, 3); 642 } 643 if(psOut->enableIpdOpd) { 644 psExtEnable = 1; 645 } 646 bitCnt += FDKsbrEnc_WriteBits_ps( hBitBuf, psExtEnable, 1); 647 } 648 649 /* Frame class, number of envelopes */ 650 bitCnt += FDKsbrEnc_WriteBits_ps( hBitBuf, psOut->frameClass, 1); 651 bitCnt += FDKsbrEnc_WriteBits_ps( hBitBuf, getEnvIdx(psOut->nEnvelopes, psOut->frameClass), 2); 652 653 if(psOut->frameClass==1) { 654 for(env=0; env<psOut->nEnvelopes; env++) { 655 bitCnt += FDKsbrEnc_WriteBits_ps( hBitBuf, psOut->frameBorder[env], 5); 656 } 657 } 658 659 if(psOut->enableIID==1) { 660 INT *iidLast = psOut->iidLast; 661 for(env=0; env<psOut->nEnvelopes; env++) { 662 bitCnt += FDKsbrEnc_WriteBits_ps( hBitBuf, psOut->deltaIID[env], 1); 663 bitCnt += FDKsbrEnc_EncodeIid( hBitBuf, 664 psOut->iid[env], 665 iidLast, 666 getNoBands(psOut->iidMode), 667 (PS_IID_RESOLUTION)getIIDRes(psOut->iidMode), 668 psOut->deltaIID[env], 669 &error ); 670 671 iidLast = psOut->iid[env]; 672 } 673 } 674 675 if(psOut->enableICC==1) { 676 INT *iccLast = psOut->iccLast; 677 for(env=0; env<psOut->nEnvelopes; env++) { 678 bitCnt += FDKsbrEnc_WriteBits_ps( hBitBuf, psOut->deltaICC[env], 1); 679 bitCnt += FDKsbrEnc_EncodeIcc( hBitBuf, 680 psOut->icc[env], 681 iccLast, 682 getNoBands(psOut->iccMode), 683 psOut->deltaICC[env], 684 &error); 685 686 iccLast = psOut->icc[env]; 687 } 688 } 689 690 if(psExtEnable!=0) { 691 bitCnt += encodePSExtension(psOut, hBitBuf); 692 } 693 694 } /* if(psOut != NULL) */ 695 696 return bitCnt; 697 } 698 699
