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 /************************* Fast MPEG AAC Audio Encoder ********************** 85 86 Initial author: A. Groeschel 87 contents/description: channel mapping functionality 88 89 ******************************************************************************/ 90 91 #include "channel_map.h" 92 #include "bitenc.h" 93 #include "psy_const.h" 94 #include "qc_data.h" 95 #include "aacEnc_ram.h" 96 97 98 /* channel_assignment treats the relationship of Input file channels 99 to the encoder channels. 100 This is necessary because the usual order in RIFF files (.wav) 101 is different from the elements order in the coder given 102 by Table 8.1 (implicit speaker mapping) of the AAC standard. 103 104 In mono and stereo case, this is trivial. 105 In mc case, it looks like this: 106 107 Channel Input file coder chan 108 5ch: 109 front center 2 0 (SCE channel) 110 left center 0 1 (1st of 1st CPE) 111 right center 1 2 (2nd of 1st CPE) 112 left surround 3 3 (1st of 2nd CPE) 113 right surround 4 4 (2nd of 2nd CPE) 114 115 5.1ch: 116 front center 2 0 (SCE channel) 117 left center 0 1 (1st of 1st CPE) 118 right center 1 2 (2nd of 1st CPE) 119 left surround 4 3 (1st of 2nd CPE) 120 right surround 5 4 (2nd of 2nd CPE) 121 LFE 3 5 (LFE) 122 */ 123 124 typedef struct { 125 126 CHANNEL_MODE encoderMode; 127 INT channel_assignment[/*(6)*/12]; 128 129 } CHANNEL_ASSIGNMENT_INFO_TAB; 130 131 132 static const CHANNEL_ASSIGNMENT_INFO_TAB assignmentInfoTabMpeg[] = 133 { 134 { MODE_INVALID, {-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* invalid */ 135 { MODE_1, { 0,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* mono */ 136 { MODE_2, { 0, 1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* stereo */ 137 { MODE_1_2, { 0, 1, 2,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* 3ch */ 138 { MODE_1_2_1, { 0, 1, 2, 3,-1,-1,-1,-1,-1,-1,-1,-1} }, /* 4ch */ 139 { MODE_1_2_2, { 0, 1, 2, 3, 4,-1,-1,-1,-1,-1,-1,-1} }, /* 5ch */ 140 { MODE_1_2_2_1, { 0, 1, 2, 3, 4, 5,-1,-1,-1,-1,-1,-1} }, /* 5.1ch */ 141 { MODE_1_2_2_2_1, { 0, 1, 2, 3, 4, 5, 6, 7,-1,-1,-1,-1} }, /* 7.1ch */ 142 }; 143 144 static const CHANNEL_ASSIGNMENT_INFO_TAB assignmentInfoTabWav[] = 145 { 146 { MODE_INVALID, {-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* invalid */ 147 { MODE_1, { 0,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* mono */ 148 { MODE_2, { 0, 1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* stereo */ 149 { MODE_1_2, { 2, 0, 1,-1,-1,-1,-1,-1,-1,-1,-1,-1} }, /* 3ch */ 150 { MODE_1_2_1, { 2, 0, 1, 3,-1,-1,-1,-1,-1,-1,-1,-1} }, /* 4ch */ 151 { MODE_1_2_2, { 2, 0, 1, 3, 4,-1,-1,-1,-1,-1,-1,-1} }, /* 5ch */ 152 { MODE_1_2_2_1, { 2, 0, 1, 4, 5, 3,-1,-1,-1,-1,-1,-1} }, /* 5.1ch */ 153 { MODE_1_2_2_2_1, { 2, 0, 1, 6, 7, 4, 5, 3,-1,-1,-1,-1} }, /* 7.1ch */ 154 }; 155 156 /* Channel mode configuration tab provides, 157 corresponding number of channels and elements 158 */ 159 static const CHANNEL_MODE_CONFIG_TAB channelModeConfig[] = 160 { 161 { MODE_1, 1, 1, 1 }, /* SCE */ 162 { MODE_2, 2, 2, 1 }, /* CPE */ 163 { MODE_1_2, 3, 3, 2 }, /* SCE,CPE */ 164 { MODE_1_2_1, 4, 4, 3 }, /* SCE,CPE,SCE */ 165 { MODE_1_2_2, 5, 5, 3 }, /* SCE,CPE,CPE */ 166 { MODE_1_2_2_1, 6, 5, 4 }, /* SCE,CPE,CPE,LFE */ 167 { MODE_1_2_2_2_1, 8, 7, 5 }, /* SCE,CPE,CPE,CPE,LFE */ 168 }; 169 170 #define MAX_MODES (sizeof(assignmentInfoTabWav)/sizeof(CHANNEL_ASSIGNMENT_INFO_TAB)) 171 172 const INT* FDKaacEnc_getChannelAssignment(CHANNEL_MODE encMode, CHANNEL_ORDER co) 173 { 174 const CHANNEL_ASSIGNMENT_INFO_TAB *pTab; 175 int i; 176 177 if (co == CH_ORDER_MPEG) 178 pTab = assignmentInfoTabMpeg; 179 else 180 pTab = assignmentInfoTabWav; 181 182 for(i=MAX_MODES-1; i>0; i--) { 183 if (encMode== pTab[i].encoderMode) { 184 break; 185 } 186 } 187 return (pTab[i].channel_assignment); 188 } 189 190 AAC_ENCODER_ERROR FDKaacEnc_DetermineEncoderMode(CHANNEL_MODE* mode, INT nChannels) 191 { 192 INT i; 193 CHANNEL_MODE encMode = MODE_INVALID; 194 195 if (*mode==MODE_UNKNOWN) { 196 for (i=0; i<(INT)sizeof(channelModeConfig)/(INT)sizeof(CHANNEL_MODE_CONFIG_TAB); i++) { 197 if (channelModeConfig[i].nChannels==nChannels) { 198 encMode = channelModeConfig[i].encMode; 199 break; 200 } 201 } 202 *mode = encMode; 203 } 204 else { 205 /* check if valid channel configuration */ 206 if (FDKaacEnc_GetChannelModeConfiguration(*mode)->nChannels==nChannels) { 207 encMode = *mode; 208 } 209 } 210 211 if (encMode==MODE_INVALID) { 212 return AAC_ENC_UNSUPPORTED_CHANNELCONFIG; 213 } 214 215 return AAC_ENC_OK; 216 } 217 218 static INT FDKaacEnc_initElement (ELEMENT_INFO* elInfo, MP4_ELEMENT_ID elType, INT* cnt, CHANNEL_MODE mode, CHANNEL_ORDER co, INT* it_cnt, const FIXP_DBL relBits) { 219 220 INT error=0; 221 INT counter =*cnt; 222 223 const INT *assign = FDKaacEnc_getChannelAssignment(mode, co); 224 225 elInfo->elType=elType; 226 elInfo->relativeBits = relBits; 227 228 switch(elInfo->elType) { 229 case ID_SCE: case ID_LFE: case ID_CCE: 230 elInfo->nChannelsInEl=1; 231 elInfo->ChannelIndex[0]=assign[counter++]; 232 elInfo->instanceTag=it_cnt[elType]++; 233 234 break; 235 case ID_CPE: 236 elInfo->nChannelsInEl=2; 237 elInfo->ChannelIndex[0]=assign[counter++]; 238 elInfo->ChannelIndex[1]=assign[counter++]; 239 elInfo->instanceTag=it_cnt[elType]++; 240 break; 241 case ID_DSE: 242 elInfo->nChannelsInEl=0; 243 elInfo->ChannelIndex[0]=0; 244 elInfo->ChannelIndex[1]=0; 245 elInfo->instanceTag=it_cnt[elType]++; 246 break; 247 default: error=1; 248 }; 249 *cnt = counter; 250 return error; 251 252 } 253 254 AAC_ENCODER_ERROR FDKaacEnc_InitChannelMapping(CHANNEL_MODE mode, CHANNEL_ORDER co, CHANNEL_MAPPING* cm) 255 { 256 INT count=0; /* count through coder channels */ 257 INT it_cnt[ID_END+1]; 258 INT i; 259 260 for (i=0; i<ID_END; i++) 261 it_cnt[i]=0; 262 263 FDKmemclear(cm, sizeof(CHANNEL_MAPPING)); 264 265 /* init channel mapping*/ 266 for (i=0; i<(INT)sizeof(channelModeConfig)/(INT)sizeof(CHANNEL_MODE_CONFIG_TAB); i++) { 267 if (channelModeConfig[i].encMode==mode) 268 { 269 cm->encMode = channelModeConfig[i].encMode; 270 cm->nChannels = channelModeConfig[i].nChannels; 271 cm->nChannelsEff = channelModeConfig[i].nChannelsEff; 272 cm->nElements = channelModeConfig[i].nElements; 273 274 break; 275 } 276 } 277 278 /* init element info struct */ 279 switch(mode) { 280 case MODE_1: 281 /* (mono) sce */ 282 FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, mode, co, it_cnt, (FIXP_DBL)MAXVAL_DBL); 283 break; 284 case MODE_2: 285 /* (stereo) cpe */ 286 FDKaacEnc_initElement(&cm->elInfo[0], ID_CPE, &count, mode, co, it_cnt, (FIXP_DBL)MAXVAL_DBL); 287 break; 288 289 case MODE_1_2: 290 /* sce + cpe */ 291 FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.4f)); 292 FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.6f)); 293 break; 294 295 case MODE_1_2_1: 296 /* sce + cpe + sce */ 297 FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.3f)); 298 FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.4f)); 299 FDKaacEnc_initElement(&cm->elInfo[2], ID_SCE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.3f)); 300 break; 301 302 case MODE_1_2_2: 303 /* sce + cpe + cpe */ 304 FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.26f)); 305 FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.37f)); 306 FDKaacEnc_initElement(&cm->elInfo[2], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.37f)); 307 break; 308 309 case MODE_1_2_2_1: 310 /* (5.1) sce + cpe + cpe + lfe */ 311 FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.24f)); 312 FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.35f)); 313 FDKaacEnc_initElement(&cm->elInfo[2], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.35f)); 314 FDKaacEnc_initElement(&cm->elInfo[3], ID_LFE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.06f)); 315 break; 316 317 case MODE_1_2_2_2_1: 318 /* (7.1) sce + cpe + cpe + cpe + lfe */ 319 FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.18f)); 320 FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.26f)); 321 FDKaacEnc_initElement(&cm->elInfo[2], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.26f)); 322 FDKaacEnc_initElement(&cm->elInfo[3], ID_CPE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.26f)); 323 FDKaacEnc_initElement(&cm->elInfo[4], ID_LFE, &count, mode, co, it_cnt, FL2FXCONST_DBL(0.04f)); 324 break; 325 326 default: 327 //*chMap=0; 328 return AAC_ENC_UNSUPPORTED_CHANNELCONFIG; 329 }; 330 331 332 FDK_ASSERT(cm->nElements<=(6)); 333 334 335 return AAC_ENC_OK; 336 } 337 338 AAC_ENCODER_ERROR FDKaacEnc_InitElementBits(QC_STATE *hQC, 339 CHANNEL_MAPPING *cm, 340 INT bitrateTot, 341 INT averageBitsTot, 342 INT maxChannelBits) 343 { 344 int sc_brTot = CountLeadingBits(bitrateTot); 345 346 switch(cm->encMode) { 347 case MODE_1: 348 hQC->elementBits[0]->chBitrateEl = bitrateTot; 349 350 hQC->elementBits[0]->maxBitsEl = maxChannelBits; 351 352 hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits; 353 break; 354 355 case MODE_2: 356 hQC->elementBits[0]->chBitrateEl = bitrateTot>>1; 357 358 hQC->elementBits[0]->maxBitsEl = 2*maxChannelBits; 359 360 hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits; 361 break; 362 case MODE_1_2: { 363 hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits; 364 hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits; 365 FIXP_DBL sceRate = cm->elInfo[0].relativeBits; 366 FIXP_DBL cpeRate = cm->elInfo[1].relativeBits; 367 368 hQC->elementBits[0]->chBitrateEl = fMult(sceRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot; 369 hQC->elementBits[1]->chBitrateEl = fMult(cpeRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1); 370 371 hQC->elementBits[0]->maxBitsEl = maxChannelBits; 372 hQC->elementBits[1]->maxBitsEl = 2*maxChannelBits; 373 break; 374 } 375 case MODE_1_2_1: { 376 /* sce + cpe + sce */ 377 hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits; 378 hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits; 379 hQC->elementBits[2]->relativeBitsEl = cm->elInfo[2].relativeBits; 380 FIXP_DBL sce1Rate = cm->elInfo[0].relativeBits; 381 FIXP_DBL cpeRate = cm->elInfo[1].relativeBits; 382 FIXP_DBL sce2Rate = cm->elInfo[2].relativeBits; 383 384 hQC->elementBits[0]->chBitrateEl = fMult(sce1Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot; 385 hQC->elementBits[1]->chBitrateEl = fMult(cpeRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1); 386 hQC->elementBits[2]->chBitrateEl = fMult(sce2Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot; 387 388 hQC->elementBits[0]->maxBitsEl = maxChannelBits; 389 hQC->elementBits[1]->maxBitsEl = 2*maxChannelBits; 390 hQC->elementBits[2]->maxBitsEl = maxChannelBits; 391 break; 392 } 393 case MODE_1_2_2: { 394 /* sce + cpe + cpe */ 395 hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits; 396 hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits; 397 hQC->elementBits[2]->relativeBitsEl = cm->elInfo[2].relativeBits; 398 FIXP_DBL sceRate = cm->elInfo[0].relativeBits; 399 FIXP_DBL cpe1Rate = cm->elInfo[1].relativeBits; 400 FIXP_DBL cpe2Rate = cm->elInfo[2].relativeBits; 401 402 hQC->elementBits[0]->chBitrateEl = fMult(sceRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot; 403 hQC->elementBits[1]->chBitrateEl = fMult(cpe1Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1); 404 hQC->elementBits[2]->chBitrateEl = fMult(cpe2Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1); 405 406 hQC->elementBits[0]->maxBitsEl = maxChannelBits; 407 hQC->elementBits[1]->maxBitsEl = 2*maxChannelBits; 408 hQC->elementBits[2]->maxBitsEl = 2*maxChannelBits; 409 break; 410 } 411 412 case MODE_1_2_2_1: { 413 /* (5.1) sce + cpe + cpe + lfe */ 414 hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits; 415 hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits; 416 hQC->elementBits[2]->relativeBitsEl = cm->elInfo[2].relativeBits; 417 hQC->elementBits[3]->relativeBitsEl = cm->elInfo[3].relativeBits; 418 FIXP_DBL sceRate = cm->elInfo[0].relativeBits; 419 FIXP_DBL cpe1Rate = cm->elInfo[1].relativeBits; 420 FIXP_DBL cpe2Rate = cm->elInfo[2].relativeBits; 421 FIXP_DBL lfeRate = cm->elInfo[3].relativeBits; 422 423 int maxBitsTot = maxChannelBits * 5; /* LFE does not add to bit reservoir */ 424 int sc = CountLeadingBits(fixMax(maxChannelBits,averageBitsTot)); 425 int maxLfeBits = (int) FDKmax ( (INT)((fMult(lfeRate,(FIXP_DBL)(maxChannelBits<<sc))>>sc)<<1), 426 (INT)((fMult(FL2FXCONST_DBL(1.1f/2.f),fMult(lfeRate,(FIXP_DBL)(averageBitsTot<<sc)))<<1)>>sc) ); 427 428 maxChannelBits = (maxBitsTot - maxLfeBits); 429 sc = CountLeadingBits(maxChannelBits); 430 431 maxChannelBits = fMult((FIXP_DBL)maxChannelBits<<sc,GetInvInt(5))>>sc; 432 433 hQC->elementBits[0]->chBitrateEl = fMult(sceRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot; 434 hQC->elementBits[1]->chBitrateEl = fMult(cpe1Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1); 435 hQC->elementBits[2]->chBitrateEl = fMult(cpe2Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1); 436 hQC->elementBits[3]->chBitrateEl = fMult(lfeRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot; 437 438 hQC->elementBits[0]->maxBitsEl = maxChannelBits; 439 hQC->elementBits[1]->maxBitsEl = 2*maxChannelBits; 440 hQC->elementBits[2]->maxBitsEl = 2*maxChannelBits; 441 hQC->elementBits[3]->maxBitsEl = maxLfeBits; 442 443 break; 444 } 445 446 case MODE_1_2_2_2_1:{ 447 /* (7.1) sce + cpe + cpe + cpe + lfe */ 448 hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits; 449 hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits; 450 hQC->elementBits[2]->relativeBitsEl = cm->elInfo[2].relativeBits; 451 hQC->elementBits[3]->relativeBitsEl = cm->elInfo[3].relativeBits; 452 hQC->elementBits[4]->relativeBitsEl = cm->elInfo[4].relativeBits; 453 FIXP_DBL sceRate = cm->elInfo[0].relativeBits; 454 FIXP_DBL cpe1Rate = cm->elInfo[1].relativeBits; 455 FIXP_DBL cpe2Rate = cm->elInfo[2].relativeBits; 456 FIXP_DBL cpe3Rate = cm->elInfo[3].relativeBits; 457 FIXP_DBL lfeRate = cm->elInfo[4].relativeBits; 458 459 int maxBitsTot = maxChannelBits * 7; /* LFE does not add to bit reservoir */ 460 int sc = CountLeadingBits(fixMax(maxChannelBits,averageBitsTot)); 461 int maxLfeBits = (int) FDKmax ( (INT)((fMult(lfeRate,(FIXP_DBL)(maxChannelBits<<sc))>>sc)<<1), 462 (INT)((fMult(FL2FXCONST_DBL(1.1f/2.f),fMult(lfeRate,(FIXP_DBL)(averageBitsTot<<sc)))<<1)>>sc) ); 463 464 maxChannelBits = (maxBitsTot - maxLfeBits) / 7; 465 466 hQC->elementBits[0]->chBitrateEl = fMult(sceRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot; 467 hQC->elementBits[1]->chBitrateEl = fMult(cpe1Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1); 468 hQC->elementBits[2]->chBitrateEl = fMult(cpe2Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1); 469 hQC->elementBits[3]->chBitrateEl = fMult(cpe3Rate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>(sc_brTot+1); 470 hQC->elementBits[4]->chBitrateEl = fMult(lfeRate, (FIXP_DBL)(bitrateTot<<sc_brTot))>>sc_brTot; 471 472 hQC->elementBits[0]->maxBitsEl = maxChannelBits; 473 hQC->elementBits[1]->maxBitsEl = 2*maxChannelBits; 474 hQC->elementBits[2]->maxBitsEl = 2*maxChannelBits; 475 hQC->elementBits[3]->maxBitsEl = 2*maxChannelBits; 476 hQC->elementBits[4]->maxBitsEl = maxLfeBits; 477 break; 478 } 479 480 default: 481 return AAC_ENC_UNSUPPORTED_CHANNELCONFIG; 482 } 483 484 return AAC_ENC_OK; 485 } 486 487 /********************************************************************************/ 488 /* */ 489 /* function: GetMonoStereoMODE(const CHANNEL_MODE mode) */ 490 /* */ 491 /* description: Determines encoder setting from channel mode. */ 492 /* Multichannel modes are mapped to mono or stereo modes */ 493 /* returns MODE_MONO in case of mono, */ 494 /* MODE_STEREO in case of stereo */ 495 /* MODE_INVALID in case of error */ 496 /* */ 497 /* input: CHANNEL_MODE mode: Encoder mode (see qc_data.h). */ 498 /* output: return: CM_STEREO_MODE monoStereoSetting */ 499 /* (MODE_INVALID: error, */ 500 /* MODE_MONO: mono */ 501 /* MODE_STEREO: stereo). */ 502 /* */ 503 /* misc: No memory is allocated. */ 504 /* */ 505 /********************************************************************************/ 506 507 ELEMENT_MODE FDKaacEnc_GetMonoStereoMode(const CHANNEL_MODE mode){ 508 509 ELEMENT_MODE monoStereoSetting = EL_MODE_INVALID; 510 511 switch(mode){ 512 case MODE_1: /* mono setups */ 513 monoStereoSetting = EL_MODE_MONO; 514 break; 515 case MODE_2: /* stereo setups */ 516 case MODE_1_2: 517 case MODE_1_2_1: 518 case MODE_1_2_2: 519 case MODE_1_2_2_1: 520 case MODE_1_2_2_2_1: 521 monoStereoSetting = EL_MODE_STEREO; 522 break; 523 default: /* error */ 524 monoStereoSetting = EL_MODE_INVALID; 525 break; 526 } 527 528 return monoStereoSetting; 529 } 530 531 const CHANNEL_MODE_CONFIG_TAB* FDKaacEnc_GetChannelModeConfiguration(const CHANNEL_MODE mode) 532 { 533 INT i; 534 const CHANNEL_MODE_CONFIG_TAB *cm_config = NULL; 535 536 /* get channel mode config */ 537 for (i=0; i<(INT)sizeof(channelModeConfig)/(INT)sizeof(CHANNEL_MODE_CONFIG_TAB); i++) { 538 if (channelModeConfig[i].encMode==mode) 539 { 540 cm_config = &channelModeConfig[i]; 541 break; 542 } 543 } 544 return cm_config; 545 } 546
