12228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 22228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* ----------------------------------------------------------------------------------------------------------- 32228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectSoftware License for The Fraunhofer FDK AAC Codec Library for Android 42228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 54f0d97057c5c640b25518358886f8c47da9fc052Jean-Michel Trivi� Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur F�rderung der angewandten Forschung e.V. 62228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project All rights reserved. 72228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 82228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1. INTRODUCTION 92228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectThe Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements 102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectthe MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. 112228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectThis FDK AAC Codec software is intended to be used on a wide variety of Android devices. 122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 132228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectAAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual 142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectaudio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by 152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectindependent studies and is widely deployed. AAC has been standardized by ISO and IEC as part 162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectof the MPEG specifications. 172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 182228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectPatent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) 192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectmay be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners 202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectindividually for the purpose of encoding or decoding bit streams in products that are compliant with 212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectthe ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license 222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectthese patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec 232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectsoftware may already be covered under those patent licenses when it is used for those licensed purposes only. 242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 252228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectCommercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, 262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectare also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional 272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectapplications information and documentation. 282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project2. COPYRIGHT LICENSE 302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 312228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectRedistribution and use in source and binary forms, with or without modification, are permitted without 322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectpayment of copyright license fees provided that you satisfy the following conditions: 332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 342228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectYou must retain the complete text of this software license in redistributions of the FDK AAC Codec or 352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectyour modifications thereto in source code form. 362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 372228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectYou must retain the complete text of this software license in the documentation and/or other materials 382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectprovided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. 392228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectYou must make available free of charge copies of the complete source code of the FDK AAC Codec and your 402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectmodifications thereto to recipients of copies in binary form. 412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 422228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectThe name of Fraunhofer may not be used to endorse or promote products derived from this library without 432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectprior written permission. 442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 452228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectYou may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec 462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectsoftware or your modifications thereto. 472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 482228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectYour modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software 492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectand the date of any change. For modified versions of the FDK AAC Codec, the term 502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term 512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." 522228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project3. NO PATENT LICENSE 542228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 552228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectNO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, 562228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with 572228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectrespect to this software. 582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 592228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectYou may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized 602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectby appropriate patent licenses. 612228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 622228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project4. DISCLAIMER 632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 642228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectThis FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors 652228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties 662228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectof merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 672228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectCONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, 682228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectincluding but not limited to procurement of substitute goods or services; loss of use, data, or profits, 692228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projector business interruption, however caused and on any theory of liability, whether in contract, strict 702228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectliability, or tort (including negligence), arising in any way out of the use of this software, even if 712228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectadvised of the possibility of such damage. 722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project5. CONTACT INFORMATION 742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 752228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectFraunhofer Institute for Integrated Circuits IIS 762228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectAttention: Audio and Multimedia Departments - FDK AAC LL 772228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectAm Wolfsmantel 33 782228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project91058 Erlangen, Germany 792228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 802228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectwww.iis.fraunhofer.de/amm 812228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectamm-info@iis.fraunhofer.de 822228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project----------------------------------------------------------------------------------------------------------- */ 832228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 842228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/******************************** MPEG Audio Encoder ************************** 852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project Initial author: M.Werner 872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project contents/description: Quantization 882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project******************************************************************************/ 902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#include "quantize.h" 922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 932228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#include "aacEnc_rom.h" 942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/***************************************************************************** 962228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project functionname: FDKaacEnc_quantizeLines 982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project description: quantizes spectrum lines 992228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project returns: 1002228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project input: global gain, number of lines to process, spectral data 1012228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project output: quantized spectrum 1022228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1032228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project*****************************************************************************/ 1042228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic void FDKaacEnc_quantizeLines(INT gain, 1052228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT noOfLines, 1062228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL *mdctSpectrum, 1072228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project SHORT *quaSpectrum) 1082228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 1092228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project int line; 1102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL k = FL2FXCONST_DBL(-0.0946f + 0.5f)>>16; 1112228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_QTD quantizer = FDKaacEnc_quantTableQ[(-gain)&3]; 1122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT quantizershift = ((-gain)>>2)+1; 1132228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (line = 0; line < noOfLines; line++) 1162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 1172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL accu = fMultDiv2(mdctSpectrum[line],quantizer); 1182228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (accu < FL2FXCONST_DBL(0.0f)) 1202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 1212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu=-accu; 1222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* normalize */ 1232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT accuShift = CntLeadingZeros(accu) - 1; /* CountLeadingBits() is not necessary here since test value is always > 0 */ 1242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu <<= accuShift; 1252228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT tabIndex = (INT)(accu>>(DFRACT_BITS-2-MANT_DIGITS))&(~MANT_SIZE); 1262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT totalShift = quantizershift-accuShift+1; 1272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu = fMultDiv2(FDKaacEnc_mTab_3_4[tabIndex],FDKaacEnc_quantTableE[totalShift&3]); 1282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project totalShift = (16-4)-(3*(totalShift>>2)); 1292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDK_ASSERT(totalShift >=0); /* MAX_QUANT_VIOLATION */ 130ed247dfa54234c1115c35a05327955b29b161e8aJean-Michel Trivi accu >>= fixMin(totalShift,DFRACT_BITS-1); 1312228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project quaSpectrum[line] = (SHORT)(-((LONG)(k + accu) >> (DFRACT_BITS-1-16))); 1322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 1332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else if(accu > FL2FXCONST_DBL(0.0f)) 1342228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 1352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* normalize */ 1362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT accuShift = CntLeadingZeros(accu) - 1; /* CountLeadingBits() is not necessary here since test value is always > 0 */ 1372228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu <<= accuShift; 1382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT tabIndex = (INT)(accu>>(DFRACT_BITS-2-MANT_DIGITS))&(~MANT_SIZE); 1392228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT totalShift = quantizershift-accuShift+1; 1402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu = fMultDiv2(FDKaacEnc_mTab_3_4[tabIndex],FDKaacEnc_quantTableE[totalShift&3]); 1412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project totalShift = (16-4)-(3*(totalShift>>2)); 1422228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDK_ASSERT(totalShift >=0); /* MAX_QUANT_VIOLATION */ 143ed247dfa54234c1115c35a05327955b29b161e8aJean-Michel Trivi accu >>= fixMin(totalShift,DFRACT_BITS-1); 1442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project quaSpectrum[line] = (SHORT)((LONG)(k + accu) >> (DFRACT_BITS-1-16)); 1452228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 1462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else 1472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project quaSpectrum[line]=0; 1482228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 1492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 1502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1522228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/***************************************************************************** 1532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1542228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project functionname:iFDKaacEnc_quantizeLines 1552228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project description: iquantizes spectrum lines 1562228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project mdctSpectrum = iquaSpectrum^4/3 *2^(0.25*gain) 1572228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project input: global gain, number of lines to process,quantized spectrum 1582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project output: spectral data 1592228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project*****************************************************************************/ 1612228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic void FDKaacEnc_invQuantizeLines(INT gain, 1622228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT noOfLines, 1632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project SHORT *quantSpectrum, 1642228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL *mdctSpectrum) 1652228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1662228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 1672228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT iquantizermod; 1682228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT iquantizershift; 1692228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT line; 1702228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1712228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project iquantizermod = gain&3; 1722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project iquantizershift = gain>>2; 1732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (line = 0; line < noOfLines; line++) { 1752228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1762228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if(quantSpectrum[line] < 0) { 1772228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL accu; 1782228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT ex,specExp,tabIndex; 1792228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL s,t; 1802228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1812228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu = (FIXP_DBL) -quantSpectrum[line]; 1822228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1832228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project ex = CountLeadingBits(accu); 1842228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu <<= ex; 1852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project specExp = (DFRACT_BITS-1) - ex; 1862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDK_ASSERT(specExp < 14); /* this fails if abs(value) > 8191 */ 1882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project tabIndex = (INT)(accu>>(DFRACT_BITS-2-MANT_DIGITS))&(~MANT_SIZE); 1902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* calculate "mantissa" ^4/3 */ 1922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project s = FDKaacEnc_mTab_4_3Elc[tabIndex]; 1932228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* get approperiate exponent multiplier for specExp^3/4 combined with scfMod */ 1952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project t = FDKaacEnc_specExpMantTableCombElc[iquantizermod][specExp]; 1962228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* multiply "mantissa" ^4/3 with exponent multiplier */ 1982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu = fMult(s,t); 1992228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2002228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* get approperiate exponent shifter */ 2012228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project specExp = FDKaacEnc_specExpTableComb[iquantizermod][specExp]-1; /* -1 to avoid overflows in accu */ 2022228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2032228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if ((-iquantizershift-specExp) < 0) 2042228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu <<= -(-iquantizershift-specExp); 2052228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else 2062228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu >>= -iquantizershift-specExp; 2072228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2082228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project mdctSpectrum[line] = -accu; 2092228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else if (quantSpectrum[line] > 0) { 2112228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL accu; 2122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT ex,specExp,tabIndex; 2132228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL s,t; 2142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu = (FIXP_DBL)(INT)quantSpectrum[line]; 2162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project ex = CountLeadingBits(accu); 2182228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu <<= ex; 2192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project specExp = (DFRACT_BITS-1) - ex; 2202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDK_ASSERT(specExp < 14); /* this fails if abs(value) > 8191 */ 2222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project tabIndex = (INT)(accu>>(DFRACT_BITS-2-MANT_DIGITS))&(~MANT_SIZE); 2242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2252228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* calculate "mantissa" ^4/3 */ 2262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project s = FDKaacEnc_mTab_4_3Elc[tabIndex]; 2272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* get approperiate exponent multiplier for specExp^3/4 combined with scfMod */ 2292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project t = FDKaacEnc_specExpMantTableCombElc[iquantizermod][specExp]; 2302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2312228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* multiply "mantissa" ^4/3 with exponent multiplier */ 2322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu = fMult(s,t); 2332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2342228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* get approperiate exponent shifter */ 2352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project specExp = FDKaacEnc_specExpTableComb[iquantizermod][specExp]-1; /* -1 to avoid overflows in accu */ 2362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2372228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (( -iquantizershift-specExp) < 0) 2382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu <<= -(-iquantizershift-specExp); 2392228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else 2402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu >>= -iquantizershift-specExp; 2412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2422228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project mdctSpectrum[line] = accu; 2432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else { 2452228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project mdctSpectrum[line] = FL2FXCONST_DBL(0.0f); 2462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2482228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 2492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/***************************************************************************** 2512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2522228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project functionname: FDKaacEnc_QuantizeSpectrum 2532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project description: quantizes the entire spectrum 2542228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project returns: 2552228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project input: number of scalefactor bands to be quantized, ... 2562228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project output: quantized spectrum 2572228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project*****************************************************************************/ 2592228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectvoid FDKaacEnc_QuantizeSpectrum(INT sfbCnt, 2602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT maxSfbPerGroup, 2612228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT sfbPerGroup, 2622228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT *sfbOffset, 2632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL *mdctSpectrum, 2642228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT globalGain, 2652228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT *scalefactors, 2662228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project SHORT *quantizedSpectrum) 2672228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 2682228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT sfbOffs,sfb; 2692228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2702228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* in FDKaacEnc_quantizeLines quaSpectrum is calculated with: 2712228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project spec^(3/4) * 2^(-3/16*QSS) * 2^(3/4*scale) + k 2722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project simplify scaling calculation and reduce QSS before: 2732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project spec^(3/4) * 2^(-3/16*(QSS - 4*scale)) */ 2742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2752228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for(sfbOffs=0;sfbOffs<sfbCnt;sfbOffs+=sfbPerGroup) 2762228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (sfb = 0; sfb < maxSfbPerGroup; sfb++) 2772228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 2782228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT scalefactor = scalefactors[sfbOffs+sfb] ; 2792228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2802228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKaacEnc_quantizeLines(globalGain - scalefactor, /* QSS */ 2812228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project sfbOffset[sfbOffs+sfb+1] - sfbOffset[sfbOffs+sfb], 2822228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project mdctSpectrum + sfbOffset[sfbOffs+sfb], 2832228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project quantizedSpectrum + sfbOffset[sfbOffs+sfb]); 2842228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 2862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/***************************************************************************** 2882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project functionname: FDKaacEnc_calcSfbDist 2902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project description: calculates distortion of quantized values 2912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project returns: distortion 2922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project input: gain, number of lines to process, spectral data 2932228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project output: 2942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project*****************************************************************************/ 2962228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectFIXP_DBL FDKaacEnc_calcSfbDist(FIXP_DBL *mdctSpectrum, 2972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project SHORT *quantSpectrum, 2982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT noOfLines, 2992228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT gain 3002228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project ) 3012228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 3022228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT i,scale; 3032228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL xfsf; 3042228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL diff; 3052228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL invQuantSpec; 3062228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3072228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project xfsf = FL2FXCONST_DBL(0.0f); 3082228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3092228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (i=0; i<noOfLines; i++) { 3102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* quantization */ 3112228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKaacEnc_quantizeLines(gain, 3122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1, 3132228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project &mdctSpectrum[i], 3142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project &quantSpectrum[i]); 3152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 316381d69840ad3af2259f0b7ef49236f9ee9c76b76Jean-Michel Trivi if (fAbs(quantSpectrum[i])>MAX_QUANT) { 317381d69840ad3af2259f0b7ef49236f9ee9c76b76Jean-Michel Trivi return FL2FXCONST_DBL(0.0f); 318381d69840ad3af2259f0b7ef49236f9ee9c76b76Jean-Michel Trivi } 3192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* inverse quantization */ 3202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKaacEnc_invQuantizeLines(gain,1,&quantSpectrum[i],&invQuantSpec); 3212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* dist */ 3232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project diff = fixp_abs(fixp_abs(invQuantSpec) - fixp_abs(mdctSpectrum[i]>>1)); 3242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3252228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project scale = CountLeadingBits(diff); 3262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project diff = scaleValue(diff, scale); 3272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project diff = fPow2(diff); 3282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project scale = fixMin(2*(scale-1), DFRACT_BITS-1); 3292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project diff = scaleValue(diff, -scale); 3312228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project xfsf = xfsf + diff; 3332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3342228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project xfsf = CalcLdData(xfsf); 3362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3372228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return xfsf; 3382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 3392228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/***************************************************************************** 3412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3422228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project functionname: FDKaacEnc_calcSfbQuantEnergyAndDist 3432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project description: calculates energy and distortion of quantized values 3442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project returns: 3452228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project input: gain, number of lines to process, quantized spectral data, 3462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project spectral data 3472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project output: energy, distortion 3482228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project*****************************************************************************/ 3502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectvoid FDKaacEnc_calcSfbQuantEnergyAndDist(FIXP_DBL *mdctSpectrum, 3512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project SHORT *quantSpectrum, 3522228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT noOfLines, 3532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT gain, 3542228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL *en, 3552228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL *dist) 3562228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 3572228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT i,scale; 3582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL invQuantSpec; 3592228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL diff; 3602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 361381d69840ad3af2259f0b7ef49236f9ee9c76b76Jean-Michel Trivi FIXP_DBL energy = FL2FXCONST_DBL(0.0f); 362381d69840ad3af2259f0b7ef49236f9ee9c76b76Jean-Michel Trivi FIXP_DBL distortion = FL2FXCONST_DBL(0.0f); 3632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3642228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (i=0; i<noOfLines; i++) { 365381d69840ad3af2259f0b7ef49236f9ee9c76b76Jean-Michel Trivi 366381d69840ad3af2259f0b7ef49236f9ee9c76b76Jean-Michel Trivi if (fAbs(quantSpectrum[i])>MAX_QUANT) { 367381d69840ad3af2259f0b7ef49236f9ee9c76b76Jean-Michel Trivi *en = FL2FXCONST_DBL(0.0f); 368381d69840ad3af2259f0b7ef49236f9ee9c76b76Jean-Michel Trivi *dist = FL2FXCONST_DBL(0.0f); 369381d69840ad3af2259f0b7ef49236f9ee9c76b76Jean-Michel Trivi return; 370381d69840ad3af2259f0b7ef49236f9ee9c76b76Jean-Michel Trivi } 371381d69840ad3af2259f0b7ef49236f9ee9c76b76Jean-Michel Trivi 3722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* inverse quantization */ 3732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKaacEnc_invQuantizeLines(gain,1,&quantSpectrum[i],&invQuantSpec); 3742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3752228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* energy */ 376381d69840ad3af2259f0b7ef49236f9ee9c76b76Jean-Michel Trivi energy += fPow2(invQuantSpec); 3772228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3782228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* dist */ 3792228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project diff = fixp_abs(fixp_abs(invQuantSpec) - fixp_abs(mdctSpectrum[i]>>1)); 3802228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3812228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project scale = CountLeadingBits(diff); 3822228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project diff = scaleValue(diff, scale); 3832228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project diff = fPow2(diff); 3842228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project scale = fixMin(2*(scale-1), DFRACT_BITS-1); 3862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project diff = scaleValue(diff, -scale); 3882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 389381d69840ad3af2259f0b7ef49236f9ee9c76b76Jean-Michel Trivi distortion += diff; 3902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 392381d69840ad3af2259f0b7ef49236f9ee9c76b76Jean-Michel Trivi *en = CalcLdData(energy)+FL2FXCONST_DBL(0.03125f); 393381d69840ad3af2259f0b7ef49236f9ee9c76b76Jean-Michel Trivi *dist = CalcLdData(distortion); 3942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 3952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 396