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 52228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project� Copyright 1995 - 2012 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#include "nf_est.h" 852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#include "sbr_misc.h" 872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#include "genericStds.h" 892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* smoothFilter[4] = {0.05857864376269f, 0.2f, 0.34142135623731f, 0.4f}; */ 912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic const FIXP_DBL smoothFilter[4] = { 0x077f813d, 0x19999995, 0x2bb3b1f5, 0x33333335 }; 922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 932228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* static const INT smoothFilterLength = 4; */ 942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic const FIXP_DBL QuantOffset = (INT)0xfc000000; /* ld64(0.25) */ 962228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#ifndef min 982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define min(a,b) ( a < b ? a:b) 992228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#endif 1002228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1012228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#ifndef max 1022228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define max(a,b) ( a > b ? a:b) 1032228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#endif 1042228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1052228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define NOISE_FLOOR_OFFSET_SCALING (3) 1062228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1072228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1082228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1092228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/**************************************************************************/ 1102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/*! 1112228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project \brief The function applies smoothing to the noise levels. 1122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1132228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project \return none 1162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project*/ 1182228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/**************************************************************************/ 1192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic void 1202228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectsmoothingOfNoiseLevels(FIXP_DBL *NoiseLevels, /*!< pointer to noise-floor levels.*/ 1212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT nEnvelopes, /*!< Number of noise floor envelopes.*/ 1222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT noNoiseBands, /*!< Number of noise bands for every noise floor envelope. */ 1232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL prevNoiseLevels[NF_SMOOTHING_LENGTH][MAX_NUM_NOISE_VALUES],/*!< Previous noise floor envelopes. */ 1242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const FIXP_DBL *smoothFilter, /*!< filter used for smoothing the noise floor levels. */ 1252228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT transientFlag) /*!< flag indicating if a transient is present*/ 1262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 1282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT i,band,env; 1292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL accu; 1302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1312228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for(env = 0; env < nEnvelopes; env++){ 1322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if(transientFlag){ 1332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (i = 0; i < NF_SMOOTHING_LENGTH; i++){ 1342228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKmemcpy(prevNoiseLevels[i],NoiseLevels+env*noNoiseBands,noNoiseBands*sizeof(FIXP_DBL)); 1352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 1362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 1372228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else { 1382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (i = 1; i < NF_SMOOTHING_LENGTH; i++){ 1392228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKmemcpy(prevNoiseLevels[i - 1],prevNoiseLevels[i],noNoiseBands*sizeof(FIXP_DBL)); 1402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 1412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKmemcpy(prevNoiseLevels[NF_SMOOTHING_LENGTH - 1],NoiseLevels+env*noNoiseBands,noNoiseBands*sizeof(FIXP_DBL)); 1422228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 1432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (band = 0; band < noNoiseBands; band++){ 1452228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu = FL2FXCONST_DBL(0.0f); 1462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (i = 0; i < NF_SMOOTHING_LENGTH; i++){ 1472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu += fMultDiv2(smoothFilter[i], prevNoiseLevels[i][band]); 1482228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 1492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDK_ASSERT( (band + env*noNoiseBands) < MAX_NUM_NOISE_VALUES); 1502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project NoiseLevels[band+ env*noNoiseBands] = accu<<1; 1512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 1522228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 1532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 1542228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1552228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/**************************************************************************/ 1562228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/*! 1572228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project \brief Does the noise floor level estiamtion. 1582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1592228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project The noiseLevel samples are scaled by the factor 0.25 1602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1612228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project \return none 1622228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project*/ 1642228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/**************************************************************************/ 1652228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic void 1662228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectqmfBasedNoiseFloorDetection(FIXP_DBL *noiseLevel, /*!< Pointer to vector to store the noise levels in.*/ 1672228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL ** quotaMatrixOrig, /*!< Matrix holding the quota values of the original. */ 1682228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project SCHAR *indexVector, /*!< Index vector to obtain the patched data. */ 1692228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT startIndex, /*!< Start index. */ 1702228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT stopIndex, /*!< Stop index. */ 1712228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT startChannel, /*!< Start channel of the current noise floor band.*/ 1722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT stopChannel, /*!< Stop channel of the current noise floor band. */ 1732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL ana_max_level, /*!< Maximum level of the adaptive noise.*/ 1742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL noiseFloorOffset, /*!< Noise floor offset. */ 1752228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT missingHarmonicFlag, /*!< Flag indicating if a strong tonal component is missing.*/ 1762228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL weightFac, /*!< Weightening factor for the difference between orig and sbr. */ 1772228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INVF_MODE diffThres, /*!< Threshold value to control the inverse filtering decision.*/ 1782228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INVF_MODE inverseFilteringLevel) /*!< Inverse filtering level of the current band.*/ 1792228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 1802228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT scale, l, k; 1812228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL meanOrig=FL2FXCONST_DBL(0.0f), meanSbr=FL2FXCONST_DBL(0.0f), diff; 1822228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL invIndex = GetInvInt(stopIndex-startIndex); 1832228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL invChannel = GetInvInt(stopChannel-startChannel); 1842228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL accu; 1852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* 1872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project Calculate the mean value, over the current time segment, for the original, the HFR 1882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project and the difference, over all channels in the current frequency range. 1892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project */ 1902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if(missingHarmonicFlag == 1){ 1922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for(l = startChannel; l < stopChannel;l++){ 1932228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* tonalityOrig */ 1942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu = FL2FXCONST_DBL(0.0f); 1952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for(k = startIndex ; k < stopIndex; k++){ 1962228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu += fMultDiv2(quotaMatrixOrig[k][l], invIndex); 1972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 1982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project meanOrig = fixMax(meanOrig,(accu<<1)); 1992228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2002228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* tonalitySbr */ 2012228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu = FL2FXCONST_DBL(0.0f); 2022228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for(k = startIndex ; k < stopIndex; k++){ 2032228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu += fMultDiv2(quotaMatrixOrig[k][indexVector[l]], invIndex); 2042228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2052228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project meanSbr = fixMax(meanSbr,(accu<<1)); 2062228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2072228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2082228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2092228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else{ 2102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for(l = startChannel; l < stopChannel;l++){ 2112228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* tonalityOrig */ 2122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu = FL2FXCONST_DBL(0.0f); 2132228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for(k = startIndex ; k < stopIndex; k++){ 2142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu += fMultDiv2(quotaMatrixOrig[k][l], invIndex); 2152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project meanOrig += fMult((accu<<1), invChannel); 2172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2182228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* tonalitySbr */ 2192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu = FL2FXCONST_DBL(0.0f); 2202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for(k = startIndex ; k < stopIndex; k++){ 2212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu += fMultDiv2(quotaMatrixOrig[k][indexVector[l]], invIndex); 2222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project meanSbr += fMult((accu<<1), invChannel); 2242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2252228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Small fix to avoid noise during silent passages.*/ 2282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if( meanOrig <= FL2FXCONST_DBL(0.000976562f*RELAXATION_FLOAT) && 2292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project meanSbr <= FL2FXCONST_DBL(0.000976562f*RELAXATION_FLOAT) ) 2302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 2312228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project meanOrig = FL2FXCONST_DBL(101.5936673f*RELAXATION_FLOAT); 2322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project meanSbr = FL2FXCONST_DBL(101.5936673f*RELAXATION_FLOAT); 2332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2342228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project meanOrig = fixMax(meanOrig,RELAXATION); 2362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project meanSbr = fixMax(meanSbr,RELAXATION); 2372228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (missingHarmonicFlag == 1 || 2392228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project inverseFilteringLevel == INVF_MID_LEVEL || 2402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project inverseFilteringLevel == INVF_LOW_LEVEL || 2412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project inverseFilteringLevel == INVF_OFF || 2422228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project inverseFilteringLevel <= diffThres) 2432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 2442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project diff = RELAXATION; 2452228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else { 2472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu = fDivNorm(meanSbr, meanOrig, &scale); 2482228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project diff = fixMax( RELAXATION, 2502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project fMult(RELAXATION_FRACT,fMult(weightFac,accu)) >>( RELAXATION_SHIFT-scale ) ) ; 2512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2522228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* 2542228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * noise Level is now a positive value, i.e. 2552228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * the more harmonic the signal is the higher noise level, 2562228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * this makes no sense so we change the sign. 2572228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project *********************************************************/ 2582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project accu = fDivNorm(diff, meanOrig, &scale); 2592228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project scale -= 2; 2602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2612228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if ( (scale>0) && (accu > ((FIXP_DBL)MAXVAL_DBL)>>scale) ) { 2622228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project *noiseLevel = (FIXP_DBL)MAXVAL_DBL; 2632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2642228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else { 2652228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project *noiseLevel = scaleValue(accu, scale); 2662228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2672228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2682228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* 2692228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * Add a noise floor offset to compensate for bias in the detector 2702228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project *****************************************************************/ 2712228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if(!missingHarmonicFlag) 2722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project *noiseLevel = fMult(*noiseLevel, noiseFloorOffset)<<(NOISE_FLOOR_OFFSET_SCALING); 2732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* 2752228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * check to see that we don't exceed the maximum allowed level 2762228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project **************************************************************/ 2772228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project *noiseLevel = fixMin(*noiseLevel, ana_max_level); /* ana_max_level is scaled with factor 0.25 */ 2782228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 2792228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2802228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/**************************************************************************/ 2812228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/*! 2822228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project \brief Does the noise floor level estiamtion. 2832228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project The function calls the Noisefloor estimation function 2842228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for the time segments decided based upon the transient 2852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project information. The block is always divided into one or two segments. 2862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project \return none 2892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project*/ 2912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/**************************************************************************/ 2922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectvoid 2932228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectFDKsbrEnc_sbrNoiseFloorEstimateQmf(HANDLE_SBR_NOISE_FLOOR_ESTIMATE h_sbrNoiseFloorEstimate, /*!< Handle to SBR_NOISE_FLOOR_ESTIMATE struct */ 2942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const SBR_FRAME_INFO *frame_info, /*!< Time frequency grid of the current frame. */ 2952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL *noiseLevels, /*!< Pointer to vector to store the noise levels in.*/ 2962228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL **quotaMatrixOrig, /*!< Matrix holding the quota values of the original. */ 2972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project SCHAR *indexVector, /*!< Index vector to obtain the patched data. */ 2982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT missingHarmonicsFlag, /*!< Flag indicating if a strong tonal component will be missing. */ 2992228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT startIndex, /*!< Start index. */ 3002228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project int numberOfEstimatesPerFrame, /*!< The number of tonality estimates per frame. */ 3012228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project int transientFrame, /*!< A flag indicating if a transient is present. */ 3022228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INVF_MODE* pInvFiltLevels, /*!< Pointer to the vector holding the inverse filtering levels. */ 3032228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project UINT sbrSyntaxFlags 3042228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project ) 3052228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3062228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 3072228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3082228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT nNoiseEnvelopes, startPos[2], stopPos[2], env, band; 3092228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT noNoiseBands = h_sbrNoiseFloorEstimate->noNoiseBands; 3112228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT *freqBandTable = h_sbrNoiseFloorEstimate->freqBandTableQmf; 3122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3132228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project nNoiseEnvelopes = frame_info->nNoiseEnvelopes; 3142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (sbrSyntaxFlags & SBR_SYNTAX_LOW_DELAY) { 3162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project nNoiseEnvelopes = 1; 3172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project startPos[0] = startIndex; 3182228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project stopPos[0] = startIndex + min(numberOfEstimatesPerFrame,2); 3192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } else 3202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if(nNoiseEnvelopes == 1){ 3212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project startPos[0] = startIndex; 3222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project stopPos[0] = startIndex + 2; 3232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else{ 3252228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project startPos[0] = startIndex; 3262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project stopPos[0] = startIndex + 1; 3272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project startPos[1] = startIndex + 1; 3282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project stopPos[1] = startIndex + 2; 3292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3312228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* 3322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * Estimate the noise floor. 3332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project **************************************/ 3342228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for(env = 0; env < nNoiseEnvelopes; env++){ 3352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for(band = 0; band < noNoiseBands; band++){ 3362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDK_ASSERT( (band + env*noNoiseBands) < MAX_NUM_NOISE_VALUES); 3372228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project qmfBasedNoiseFloorDetection(&noiseLevels[band + env*noNoiseBands], 3382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project quotaMatrixOrig, 3392228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project indexVector, 3402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project startPos[env], 3412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project stopPos[env], 3422228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project freqBandTable[band], 3432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project freqBandTable[band+1], 3442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->ana_max_level, 3452228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->noiseFloorOffset[band], 3462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project missingHarmonicsFlag, 3472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->weightFac, 3482228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->diffThres, 3492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project pInvFiltLevels[band]); 3502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3522228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3542228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* 3552228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * Smoothing of the values. 3562228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project **************************/ 3572228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project smoothingOfNoiseLevels(noiseLevels, 3582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project nNoiseEnvelopes, 3592228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->noNoiseBands, 3602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->prevNoiseLevels, 3612228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->smoothFilter, 3622228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project transientFrame); 3632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3642228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3652228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* quantisation*/ 3662228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for(env = 0; env < nNoiseEnvelopes; env++){ 3672228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for(band = 0; band < noNoiseBands; band++){ 3682228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDK_ASSERT( (band + env*noNoiseBands) < MAX_NUM_NOISE_VALUES); 3692228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project noiseLevels[band + env*noNoiseBands] = 3702228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project (FIXP_DBL)NOISE_FLOOR_OFFSET_64 - (FIXP_DBL)CalcLdData(noiseLevels[band + env*noNoiseBands]+(FIXP_DBL)1) + QuantOffset; 3712228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 3742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3752228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/**************************************************************************/ 3762228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/*! 3772228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project \brief 3782228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3792228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3802228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project \return errorCode, noError if successful 3812228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3822228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project*/ 3832228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/**************************************************************************/ 3842228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic INT 3852228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectdownSampleLoRes(INT *v_result, /*!< */ 3862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT num_result, /*!< */ 3872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const UCHAR *freqBandTableRef,/*!< */ 3882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT num_Ref) /*!< */ 3892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 3902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT step; 3912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT i,j; 3922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT org_length,result_length; 3932228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT v_index[MAX_FREQ_COEFFS/2]; 3942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* init */ 3962228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project org_length=num_Ref; 3972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project result_length=num_result; 3982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3992228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project v_index[0]=0; /* Always use left border */ 4002228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project i=0; 4012228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project while(org_length > 0) /* Create downsample vector */ 4022228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 4032228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project i++; 4042228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project step=org_length/result_length; /* floor; */ 4052228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project org_length=org_length - step; 4062228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project result_length--; 4072228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project v_index[i]=v_index[i-1]+step; 4082228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4092228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if(i != num_result ) /* Should never happen */ 4112228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return (1);/* error downsampling */ 4122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4132228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for(j=0;j<=i;j++) /* Use downsample vector to index LoResolution vector. */ 4142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 4152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project v_result[j]=freqBandTableRef[v_index[j]]; 4162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4182228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return (0); 4192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 4202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/**************************************************************************/ 4222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/*! 4232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project \brief Initialize an instance of the noise floor level estimation module. 4242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4252228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project \return errorCode, noError if successful 4272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project*/ 4292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/**************************************************************************/ 4302228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectINT 4312228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectFDKsbrEnc_InitSbrNoiseFloorEstimate (HANDLE_SBR_NOISE_FLOOR_ESTIMATE h_sbrNoiseFloorEstimate, /*!< Handle to SBR_NOISE_FLOOR_ESTIMATE struct */ 4322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT ana_max_level, /*!< Maximum level of the adaptive noise. */ 4332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const UCHAR *freqBandTable, /*!< Frequany band table. */ 4342228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT nSfb, /*!< Number of frequency bands. */ 4352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT noiseBands, /*!< Number of noise bands per octave. */ 4362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT noiseFloorOffset, /*!< Noise floor offset. */ 4372228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT timeSlots, /*!< Number of time slots in a frame. */ 4382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project UINT useSpeechConfig /*!< Flag: adapt tuning parameters according to speech */ 4392228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project ) 4402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 4412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT i, qexp, qtmp; 4422228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL tmp, exp; 4432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKmemclear(h_sbrNoiseFloorEstimate,sizeof(SBR_NOISE_FLOOR_ESTIMATE)); 4452228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->smoothFilter = smoothFilter; 4472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (useSpeechConfig) { 4482228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->weightFac = (FIXP_DBL)MAXVAL_DBL; 4492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->diffThres = INVF_LOW_LEVEL; 4502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else { 4522228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->weightFac = FL2FXCONST_DBL(0.25f); 4532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->diffThres = INVF_MID_LEVEL; 4542228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4552228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4562228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->timeSlots = timeSlots; 4572228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->noiseBands = noiseBands; 4582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4592228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* h_sbrNoiseFloorEstimate->ana_max_level is scaled by 0.25 */ 4602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project switch(ana_max_level) 4612228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 4622228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project case 6: 4632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->ana_max_level = (FIXP_DBL)MAXVAL_DBL; 4642228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project break; 4652228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project case 3: 4662228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->ana_max_level = FL2FXCONST_DBL(0.5); 4672228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project break; 4682228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project case -3: 4692228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->ana_max_level = FL2FXCONST_DBL(0.125); 4702228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project break; 4712228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project default: 4722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Should not enter here */ 4732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->ana_max_level = (FIXP_DBL)MAXVAL_DBL; 4742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project break; 4752228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4762228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4772228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* 4782228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project calculate number of noise bands and allocate 4792228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project */ 4802228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if(FDKsbrEnc_resetSbrNoiseFloorEstimate(h_sbrNoiseFloorEstimate,freqBandTable,nSfb)) 4812228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return(1); 4822228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4832228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if(noiseFloorOffset == 0) { 4842228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project tmp = ((FIXP_DBL)MAXVAL_DBL)>>NOISE_FLOOR_OFFSET_SCALING; 4852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else { 4872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDK_ASSERT(noiseFloorOffset<=8); /* because of NOISE_FLOOR_OFFSET_SCALING */ 4882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Assumes the noise floor offset in tuning table are in q31 */ 4902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Currently the table contains only 0 for noise floor offset */ 4912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Change the qformat here when non-zero values would be filled */ 4922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project exp = fDivNorm((FIXP_DBL)noiseFloorOffset, 3, &qexp); 4932228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project tmp = fPow(2, DFRACT_BITS-1, exp, qexp, &qtmp); 4942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project tmp = scaleValue(tmp, qtmp-NOISE_FLOOR_OFFSET_SCALING); 4952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4962228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for(i=0;i<h_sbrNoiseFloorEstimate->noNoiseBands;i++) { 4982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->noiseFloorOffset[i] = tmp; 4992228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 5002228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5012228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return (0); 5022228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 5032228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5042228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/**************************************************************************/ 5052228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/*! 5062228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project \brief Resets the current instance of the noise floor estiamtion 5072228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project module. 5082228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5092228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project \return errorCode, noError if successful 5112228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project*/ 5132228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/**************************************************************************/ 5142228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectINT 5152228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectFDKsbrEnc_resetSbrNoiseFloorEstimate (HANDLE_SBR_NOISE_FLOOR_ESTIMATE h_sbrNoiseFloorEstimate, /*!< Handle to SBR_NOISE_FLOOR_ESTIMATE struct */ 5162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const UCHAR *freqBandTable, /*!< Frequany band table. */ 5172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT nSfb) /*!< Number of bands in the frequency band table. */ 5182228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 5192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT k2,kx; 5202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* 5222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * Calculate number of noise bands 5232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project ***********************************/ 5242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project k2=freqBandTable[nSfb]; 5252228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project kx=freqBandTable[0]; 5262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if(h_sbrNoiseFloorEstimate->noiseBands == 0){ 5272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->noNoiseBands = 1; 5282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 5292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else{ 5302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* 5312228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * Calculate number of noise bands 1,2 or 3 bands/octave 5322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project ********************************************************/ 5332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL tmp, ratio, lg2; 5342228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT ratio_e, qlg2; 5352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project ratio = fDivNorm(k2, kx, &ratio_e); 5372228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project lg2 = fLog2(ratio, ratio_e, &qlg2); 5382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project tmp = fMult((FIXP_DBL)(h_sbrNoiseFloorEstimate->noiseBands<<24), lg2); 5392228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project tmp = scaleValue(tmp, qlg2-23); 5402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->noNoiseBands = (INT)((tmp + (FIXP_DBL)1) >> 1); 5422228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (h_sbrNoiseFloorEstimate->noNoiseBands > MAX_NUM_NOISE_COEFFS) 5442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->noNoiseBands = MAX_NUM_NOISE_COEFFS; 5452228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if( h_sbrNoiseFloorEstimate->noNoiseBands==0) 5472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->noNoiseBands=1; 5482228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 5492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return(downSampleLoRes(h_sbrNoiseFloorEstimate->freqBandTableQmf, 5522228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project h_sbrNoiseFloorEstimate->noNoiseBands, 5532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project freqBandTable,nSfb)); 5542228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 5552228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5562228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/**************************************************************************/ 5572228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/*! 5582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project \brief Deletes the current instancce of the noise floor level 5592228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project estimation module. 5602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5612228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5622228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project \return none 5632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5642228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project*/ 5652228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/**************************************************************************/ 5662228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectvoid 5672228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectFDKsbrEnc_deleteSbrNoiseFloorEstimate (HANDLE_SBR_NOISE_FLOOR_ESTIMATE h_sbrNoiseFloorEstimate) /*!< Handle to SBR_NOISE_FLOOR_ESTIMATE struct */ 5682228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 5692228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5702228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (h_sbrNoiseFloorEstimate) { 5712228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* 5722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project nothing to do 5732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project */ 5742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 5752228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 576