1 2/* ----------------------------------------------------------------------------------------------------------- 3Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5© Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. 6 All rights reserved. 7 8 1. INTRODUCTION 9The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements 10the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. 11This FDK AAC Codec software is intended to be used on a wide variety of Android devices. 12 13AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual 14audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by 15independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part 16of the MPEG specifications. 17 18Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) 19may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners 20individually for the purpose of encoding or decoding bit streams in products that are compliant with 21the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license 22these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec 23software may already be covered under those patent licenses when it is used for those licensed purposes only. 24 25Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, 26are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional 27applications information and documentation. 28 292. COPYRIGHT LICENSE 30 31Redistribution and use in source and binary forms, with or without modification, are permitted without 32payment of copyright license fees provided that you satisfy the following conditions: 33 34You must retain the complete text of this software license in redistributions of the FDK AAC Codec or 35your modifications thereto in source code form. 36 37You must retain the complete text of this software license in the documentation and/or other materials 38provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. 39You must make available free of charge copies of the complete source code of the FDK AAC Codec and your 40modifications thereto to recipients of copies in binary form. 41 42The name of Fraunhofer may not be used to endorse or promote products derived from this library without 43prior written permission. 44 45You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec 46software or your modifications thereto. 47 48Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software 49and 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." 52 533. NO PATENT LICENSE 54 55NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, 56ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with 57respect to this software. 58 59You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized 60by appropriate patent licenses. 61 624. DISCLAIMER 63 64This 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 66of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 67CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, 68including but not limited to procurement of substitute goods or services; loss of use, data, or profits, 69or business interruption, however caused and on any theory of liability, whether in contract, strict 70liability, or tort (including negligence), arising in any way out of the use of this software, even if 71advised of the possibility of such damage. 72 735. CONTACT INFORMATION 74 75Fraunhofer Institute for Integrated Circuits IIS 76Attention: Audio and Multimedia Departments - FDK AAC LL 77Am Wolfsmantel 33 7891058 Erlangen, Germany 79 80www.iis.fraunhofer.de/amm 81amm-info@iis.fraunhofer.de 82----------------------------------------------------------------------------------------------------------- */ 83 84/*************************** Fraunhofer IIS FDK Tools *********************** 85 86 Author(s): M. Lohwasser 87 Description: common bitbuffer read/write routines 88 89******************************************************************************/ 90 91#include "FDK_bitbuffer.h" 92 93 94 95 96#include "genericStds.h" 97#include "common_fix.h" 98#include "fixminmax.h" 99 100const UINT BitMask [32+1] = 101{ 102 0x0, 0x1, 0x3, 0x7, 103 0xf, 0x1f, 0x3f, 0x7f, 104 0xff, 0x1ff, 0x3ff, 0x7ff, 105 0xfff, 0x1fff, 0x3fff, 0x7fff, 106 0xffff, 0x1ffff, 0x3ffff, 0x7ffff, 107 0xfffff, 0x1fffff, 0x3fffff, 0x7fffff, 108 0xffffff, 0x1ffffff, 0x3ffffff, 0x7ffffff, 109 0xfffffff, 0x1fffffff, 0x3fffffff, 0x7fffffff, 110 0xffffffff 111}; 112 113const UINT *const RESTRICT pBitMask = BitMask; 114 115void FDK_CreateBitBuffer (HANDLE_FDK_BITBUF *hBitBuf, UCHAR *pBuffer, 116 UINT bufSize) 117{ 118 FDK_InitBitBuffer (*hBitBuf, pBuffer, bufSize, 0); 119 120 FDKmemclear((*hBitBuf)->Buffer, bufSize*sizeof(UCHAR)); 121} 122 123void FDK_DeleteBitBuffer (HANDLE_FDK_BITBUF hBitBuf) { ; } 124 125void FDK_InitBitBuffer (HANDLE_FDK_BITBUF hBitBuf, UCHAR *pBuffer, 126 UINT bufSize, UINT validBits) 127{ 128 hBitBuf->ValidBits = validBits ; 129 hBitBuf->ReadOffset = 0 ; 130 hBitBuf->WriteOffset = 0 ; 131 hBitBuf->BitCnt = 0 ; 132 hBitBuf->BitNdx = 0 ; 133 134 hBitBuf->Buffer = pBuffer ; 135 hBitBuf->bufSize = bufSize ; 136 hBitBuf->bufBits = (bufSize << 3) ; 137#if defined(FDK_DEBUG) || defined(DEBUG) 138 /*assure bufsize (2^n) */ 139 if (bufSize!=0) { 140 UINT x = 0, n=bufSize; 141 for (x=0; n>0; x++,n>>=1) {} 142 if ( bufSize != (1<<(x-1)) ) { 143 FDKprintfErr("Error: bufSizein FDK_InitBitBuffer() != (2^n), %d\n", bufSize); 144 } 145 } 146#endif 147} 148 149void FDK_ResetBitBuffer ( HANDLE_FDK_BITBUF hBitBuf ) 150{ 151 hBitBuf->ValidBits = 0 ; 152 hBitBuf->ReadOffset = 0 ; 153 hBitBuf->WriteOffset = 0 ; 154 hBitBuf->BitCnt = 0 ; 155 hBitBuf->BitNdx = 0 ; 156} 157 158INT FDK_get (HANDLE_FDK_BITBUF hBitBuf, const UINT numberOfBits) 159{ 160 UINT byteOffset = hBitBuf->BitNdx >> 3 ; 161 UINT bitOffset = hBitBuf->BitNdx & 0x07 ; 162 163 hBitBuf->BitNdx = (hBitBuf->BitNdx + numberOfBits) & (hBitBuf->bufBits - 1) ; 164 hBitBuf->BitCnt += numberOfBits ; 165 hBitBuf->ValidBits -= numberOfBits ; 166 167 UINT byteMask = hBitBuf->bufSize - 1 ; 168 169 UINT tx = (hBitBuf->Buffer [ byteOffset & byteMask] << 24) | 170 (hBitBuf->Buffer [(byteOffset+1) & byteMask] << 16) | 171 (hBitBuf->Buffer [(byteOffset+2) & byteMask] << 8) | 172 hBitBuf->Buffer [(byteOffset+3) & byteMask]; 173 174 if (bitOffset) 175 { 176 tx <<= bitOffset; 177 tx |= hBitBuf->Buffer [(byteOffset+4) & byteMask] >> (8-bitOffset); 178 } 179 180 return (tx >> (32 - numberOfBits)) ; 181} 182 183INT FDK_get32 (HANDLE_FDK_BITBUF hBitBuf) 184{ 185 UINT BitNdx = hBitBuf->BitNdx + 32; 186 if (BitNdx <= hBitBuf->bufBits) 187 { 188 hBitBuf->BitNdx = BitNdx; 189 hBitBuf->BitCnt += 32; 190 hBitBuf->ValidBits -= 32; 191 192 UINT byteOffset = (BitNdx-1) >> 3; 193 UINT cache = (hBitBuf->Buffer[(byteOffset-3)] << 24) | 194 (hBitBuf->Buffer[(byteOffset-2)] << 16) | 195 (hBitBuf->Buffer[(byteOffset-1)] << 8) | 196 hBitBuf->Buffer[(byteOffset-0)]; 197 198 if ( (BitNdx = (BitNdx&7)) != 0 ) { 199 cache = (cache >> (8-BitNdx)) | ((UINT)hBitBuf->Buffer [byteOffset-4] << (24+BitNdx)); 200 } 201 return (cache) ; 202 } 203 else 204 { 205 /* exotic path, used only at the end of the buffer, when wrapping around */ 206 int nBits = (INT)hBitBuf->bufBits-(INT)hBitBuf->BitNdx; 207 208 UINT cache = FDK_get (hBitBuf,nBits)<< (32-nBits); 209 cache |= (FDK_get (hBitBuf,32-nBits)); 210 return (cache); 211 } 212} 213 214INT FDK_getBwd (HANDLE_FDK_BITBUF hBitBuf, const UINT numberOfBits) 215{ 216 UINT byteOffset = hBitBuf->BitNdx >> 3 ; 217 UINT bitOffset = hBitBuf->BitNdx & 0x07 ; 218 UINT byteMask = hBitBuf->bufSize - 1 ; 219 int i; 220 221 hBitBuf->BitNdx = (hBitBuf->BitNdx - numberOfBits) & (hBitBuf->bufBits - 1) ; 222 hBitBuf->BitCnt -= numberOfBits ; 223 hBitBuf->ValidBits += numberOfBits ; 224 225 UINT tx = hBitBuf->Buffer [(byteOffset-3) & byteMask] << 24 | 226 hBitBuf->Buffer [(byteOffset-2) & byteMask] << 16 | 227 hBitBuf->Buffer [(byteOffset-1) & byteMask] << 8 | 228 hBitBuf->Buffer [ byteOffset & byteMask] ; 229 UINT txa = 0x0; 230 231 tx >>= (8 - bitOffset) ; 232 233 if (bitOffset && numberOfBits > 24) 234 { 235 tx |= hBitBuf->Buffer [(byteOffset-4) & byteMask] << (24 + bitOffset) ; 236 } 237 238 /* in place turn around */ 239 for (i = 0; i < 16; i++) { 240 UINT bitMaskR = 0x00000001 << i; 241 UINT bitMaskL = 0x80000000 >> i; 242 243 txa |= (tx & bitMaskR) << (31 - (i<<1)); 244 txa |= (tx & bitMaskL) >> (31 - (i<<1)); 245 } 246 247 return (txa >> (32 - numberOfBits)) ; 248} 249 250void FDK_put (HANDLE_FDK_BITBUF hBitBuf, UINT value, const UINT numberOfBits) 251{ 252 UINT byteOffset = hBitBuf->BitNdx >> 3 ; 253 UINT bitOffset = hBitBuf->BitNdx & 0x07 ; 254 255 hBitBuf->BitNdx = (hBitBuf->BitNdx + numberOfBits) & (hBitBuf->bufBits - 1) ; 256 hBitBuf->BitCnt += numberOfBits ; 257 hBitBuf->ValidBits += numberOfBits ; 258 259 UINT byteMask = hBitBuf->bufSize - 1 ; 260 261 UINT tmp = value<<(32-numberOfBits)>>bitOffset; 262 UINT mask = ~BitMask[(32-bitOffset)] | (BitMask [(32-numberOfBits)] >> bitOffset) ; 263 264 hBitBuf->Buffer [ byteOffset & byteMask] = (hBitBuf->Buffer [ byteOffset & byteMask]&(mask>>24)) | (UCHAR)(tmp>>24); 265 hBitBuf->Buffer [(byteOffset+1) & byteMask] = (hBitBuf->Buffer [(byteOffset+1) & byteMask]&(mask>>16)) | (UCHAR)(tmp>>16); 266 hBitBuf->Buffer [(byteOffset+2) & byteMask] = (hBitBuf->Buffer [(byteOffset+2) & byteMask]&(mask>>8)) | (UCHAR)(tmp>>8); 267 hBitBuf->Buffer [(byteOffset+3) & byteMask] = (hBitBuf->Buffer [(byteOffset+3) & byteMask]&(mask)) | (UCHAR)(tmp); 268 269 if (bitOffset && numberOfBits > 24) 270 { 271 hBitBuf->Buffer [(byteOffset+4) & byteMask] = (UCHAR)(value<<(40-numberOfBits)>>bitOffset) | 272 ( hBitBuf->Buffer [(byteOffset+4) & byteMask] & BitMask[(40-numberOfBits-bitOffset)] ) ; 273 } 274} 275 276void FDK_putBwd (HANDLE_FDK_BITBUF hBitBuf, UINT value, const UINT numberOfBits) 277{ 278 UINT byteOffset = hBitBuf->BitNdx >> 3 ; 279 UINT bitOffset = 7 - (hBitBuf->BitNdx & 0x07) ; 280 UINT byteMask = hBitBuf->bufSize - 1 ; 281 282 UINT mask = ~(BitMask[numberOfBits] << bitOffset) ; 283 UINT tmp = 0x0000; 284 int i; 285 286 hBitBuf->BitNdx = (hBitBuf->BitNdx - numberOfBits) & (hBitBuf->bufBits - 1) ; 287 hBitBuf->BitCnt -= numberOfBits ; 288 hBitBuf->ValidBits -= numberOfBits ; 289 290 /* in place turn around */ 291 for (i = 0; i < 16; i++) { 292 UINT bitMaskR = 0x00000001 << i; 293 UINT bitMaskL = 0x80000000 >> i; 294 295 tmp |= (value & bitMaskR) << (31 - (i<<1)); 296 tmp |= (value & bitMaskL) >> (31 - (i<<1)); 297 } 298 value = tmp; 299 tmp = value>>(32-numberOfBits)<<bitOffset; 300 301 hBitBuf->Buffer [ byteOffset & byteMask] = (hBitBuf->Buffer [ byteOffset & byteMask]&(mask)) | (UCHAR)(tmp); 302 hBitBuf->Buffer [(byteOffset-1) & byteMask] = (hBitBuf->Buffer [(byteOffset-1) & byteMask]&(mask>>8)) | (UCHAR)(tmp>>8); 303 hBitBuf->Buffer [(byteOffset-2) & byteMask] = (hBitBuf->Buffer [(byteOffset-2) & byteMask]&(mask>>16)) | (UCHAR)(tmp>>16); 304 hBitBuf->Buffer [(byteOffset-3) & byteMask] = (hBitBuf->Buffer [(byteOffset-3) & byteMask]&(mask>>24)) | (UCHAR)(tmp>>24); 305 306 if ((bitOffset + numberOfBits) > 32) 307 { 308 hBitBuf->Buffer [(byteOffset-4) & byteMask] = (UCHAR)(value>>(64-numberOfBits-bitOffset)) | 309 ( hBitBuf->Buffer [(byteOffset-4) & byteMask] & ~(BitMask[bitOffset] >> (32-numberOfBits)) ) ; 310 } 311} 312 313 314void FDK_pushBack (HANDLE_FDK_BITBUF hBitBuf, const UINT numberOfBits, UCHAR config) 315{ 316 hBitBuf->BitCnt -= numberOfBits ; 317 hBitBuf->ValidBits += (config==0) ? numberOfBits : (-(INT)numberOfBits) ; 318 hBitBuf->BitNdx = (hBitBuf->BitNdx - numberOfBits) & (hBitBuf->bufBits - 1) ; 319} 320 321void FDK_pushForward (HANDLE_FDK_BITBUF hBitBuf, const UINT numberOfBits, UCHAR config) 322{ 323 hBitBuf->BitCnt += numberOfBits ; 324 hBitBuf->ValidBits -= (config==0) ? numberOfBits : (-(INT)numberOfBits) ; 325 hBitBuf->BitNdx = (hBitBuf->BitNdx + numberOfBits) & (hBitBuf->bufBits - 1) ; 326} 327 328 329void FDK_byteAlign (HANDLE_FDK_BITBUF hBitBuf, UCHAR config) 330{ 331 INT alignment = hBitBuf->BitCnt & 0x07 ; 332 333 if (alignment) 334 { 335 if (config==0) 336 FDK_pushForward (hBitBuf, 8 - alignment, config) ; /* BS_READER */ 337 else 338 FDK_put (hBitBuf,0 , 8 - alignment) ; /* BS_WRITER */ 339 } 340 341 hBitBuf->BitCnt = 0 ; 342} 343 344UINT FDK_getValidBits (HANDLE_FDK_BITBUF hBitBuf) 345{ 346 return hBitBuf->ValidBits; 347} 348 349INT FDK_getFreeBits (HANDLE_FDK_BITBUF hBitBuf) 350{ 351 return (hBitBuf->bufBits - hBitBuf->ValidBits) ; 352} 353 354void FDK_setBitCnt (HANDLE_FDK_BITBUF hBitBuf, const UINT value) 355{ 356 hBitBuf->BitCnt = value ; 357} 358 359INT FDK_getBitCnt (HANDLE_FDK_BITBUF hBitBuf) 360{ 361 return hBitBuf->BitCnt ; 362} 363 364void FDK_Feed(HANDLE_FDK_BITBUF hBitBuf, 365 UCHAR *RESTRICT inputBuffer, 366 const UINT bufferSize, 367 UINT *bytesValid) 368{ 369 inputBuffer = &inputBuffer [bufferSize - *bytesValid] ; 370 371 UINT bTotal = 0 ; 372 373 UINT bToRead = (hBitBuf->bufBits - hBitBuf->ValidBits) >> 3 ; 374 UINT noOfBytes = fMin(bToRead, *bytesValid); //(bToRead < *bytesValid) ? bToRead : *bytesValid ; 375 376 while (noOfBytes > 0) 377 { 378 /* split read to buffer size */ 379 bToRead = hBitBuf->bufSize - hBitBuf->ReadOffset ; 380 bToRead = fMin(bToRead, noOfBytes); //(bToRead < noOfBytes) ? bToRead : noOfBytes ; 381 382 /* copy 'bToRead' bytes from 'ptr' to inputbuffer */ 383 FDKmemcpy(&hBitBuf->Buffer[hBitBuf->ReadOffset], inputBuffer, bToRead*sizeof(UCHAR)); 384 385 /* add noOfBits to number of valid bits in buffer */ 386 hBitBuf->ValidBits += bToRead << 3 ; 387 bTotal += bToRead ; 388 inputBuffer += bToRead ; 389 390 hBitBuf->ReadOffset = (hBitBuf->ReadOffset + bToRead) & (hBitBuf->bufSize - 1) ; 391 noOfBytes -= bToRead ; 392 } 393 394 *bytesValid -= bTotal ; 395} 396 397void CopyAlignedBlock (HANDLE_FDK_BITBUF h_BitBufSrc, UCHAR *RESTRICT dstBuffer, UINT bToRead) 398{ 399 UINT byteOffset = h_BitBufSrc->BitNdx >> 3 ; 400 const UINT byteMask = h_BitBufSrc->bufSize - 1 ; 401 402 UCHAR *RESTRICT pBBB = h_BitBufSrc->Buffer; 403 for (UINT i = 0 ; i < bToRead ; i++) 404 { 405 dstBuffer[i] = pBBB[(byteOffset+i) & byteMask] ; 406 } 407 408 bToRead <<= 3 ; 409 410 h_BitBufSrc->BitNdx = (h_BitBufSrc->BitNdx + bToRead) & (h_BitBufSrc->bufBits - 1) ; 411 h_BitBufSrc->BitCnt += bToRead ; 412 h_BitBufSrc->ValidBits -= bToRead ; 413} 414 415void FDK_Copy (HANDLE_FDK_BITBUF h_BitBufDst, HANDLE_FDK_BITBUF h_BitBufSrc, UINT *bytesValid) 416{ 417 INT bTotal = 0; 418 419 /* limit noOfBytes to valid bytes in src buffer and available bytes in dst buffer */ 420 UINT bToRead = h_BitBufSrc->ValidBits >> 3 ; 421 UINT noOfBytes = fMin(bToRead, *bytesValid); //(*bytesValid < bToRead) ? *bytesValid : bToRead ; 422 bToRead = FDK_getFreeBits(h_BitBufDst); 423 noOfBytes = fMin(bToRead, noOfBytes); //(bToRead < noOfBytes) ? bToRead : noOfBytes; 424 425 while (noOfBytes > 0) 426 { 427 /* Split Read to buffer size */ 428 bToRead = h_BitBufDst->bufSize - h_BitBufDst->ReadOffset ; 429 bToRead = fMin(noOfBytes, bToRead); //(noOfBytes < bToRead) ? noOfBytes : bToRead ; 430 431 /* copy 'bToRead' bytes from buffer to buffer */ 432 if (!(h_BitBufSrc->BitNdx & 0x07)) { 433 CopyAlignedBlock (h_BitBufSrc, h_BitBufDst->Buffer + h_BitBufDst->ReadOffset, bToRead) ; 434 } else { 435 for (UINT i = 0; i < bToRead; i++) 436 { 437 h_BitBufDst->Buffer [h_BitBufDst->ReadOffset + i] = (UCHAR)FDK_get(h_BitBufSrc,8); 438 } 439 } 440 441 /* add noOfBits to number of valid bits in buffer */ 442 h_BitBufDst->ValidBits += bToRead << 3 ; 443 bTotal += bToRead; 444 445 h_BitBufDst->ReadOffset = (h_BitBufDst->ReadOffset + bToRead) & (h_BitBufDst->bufSize-1); 446 noOfBytes -= bToRead; 447 } 448 449 *bytesValid -=bTotal; 450} 451 452void FDK_Fetch (HANDLE_FDK_BITBUF hBitBuf, UCHAR *outBuf, UINT *writeBytes) 453{ 454 UCHAR *RESTRICT outputBuffer = outBuf; 455 UINT bTotal = 0 ; 456 457 UINT bToWrite = (hBitBuf->ValidBits) >> 3 ; 458 UINT noOfBytes = fMin(bToWrite, *writeBytes); //(bToWrite < *writeBytes) ? bToWrite : *writeBytes ; 459 460 while (noOfBytes > 0) 461 { 462 /* split write to buffer size */ 463 bToWrite = hBitBuf->bufSize - hBitBuf->WriteOffset ; 464 bToWrite = fMin(bToWrite, noOfBytes); //(bToWrite < noOfBytes) ? bToWrite : noOfBytes ; 465 466 /* copy 'bToWrite' bytes from bitbuffer to outputbuffer */ 467 FDKmemcpy(outputBuffer, &hBitBuf->Buffer[hBitBuf->WriteOffset], bToWrite*sizeof(UCHAR)); 468 469 /* sub noOfBits from number of valid bits in buffer */ 470 hBitBuf->ValidBits -= bToWrite << 3 ; 471 bTotal += bToWrite ; 472 outputBuffer += bToWrite ; 473 474 hBitBuf->WriteOffset = (hBitBuf->WriteOffset + bToWrite) & (hBitBuf->bufSize - 1) ; 475 noOfBytes -= bToWrite ; 476 } 477 478 *writeBytes = bTotal ; 479} 480 481