diff options
Diffstat (limited to 'libAACenc/src/aacenc_pns.cpp')
| -rw-r--r-- | libAACenc/src/aacenc_pns.cpp | 508 |
1 files changed, 229 insertions, 279 deletions
diff --git a/libAACenc/src/aacenc_pns.cpp b/libAACenc/src/aacenc_pns.cpp index b9640d9..f0571d6 100644 --- a/libAACenc/src/aacenc_pns.cpp +++ b/libAACenc/src/aacenc_pns.cpp @@ -1,74 +1,85 @@ - -/* ----------------------------------------------------------------------------------------------------------- +/* ----------------------------------------------------------------------------- Software License for The Fraunhofer FDK AAC Codec Library for Android -© Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. - All rights reserved. +© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten +Forschung e.V. All rights reserved. 1. INTRODUCTION -The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements -the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. -This FDK AAC Codec software is intended to be used on a wide variety of Android devices. - -AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual -audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by -independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part -of the MPEG specifications. - -Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) -may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners -individually for the purpose of encoding or decoding bit streams in products that are compliant with -the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license -these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec -software may already be covered under those patent licenses when it is used for those licensed purposes only. - -Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, -are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional -applications information and documentation. +The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software +that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding +scheme for digital audio. This FDK AAC Codec software is intended to be used on +a wide variety of Android devices. + +AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient +general perceptual audio codecs. AAC-ELD is considered the best-performing +full-bandwidth communications codec by independent studies and is widely +deployed. AAC has been standardized by ISO and IEC as part of the MPEG +specifications. + +Patent licenses for necessary patent claims for the FDK AAC Codec (including +those of Fraunhofer) may be obtained through Via Licensing +(www.vialicensing.com) or through the respective patent owners individually for +the purpose of encoding or decoding bit streams in products that are compliant +with the ISO/IEC MPEG audio standards. Please note that most manufacturers of +Android devices already license these patent claims through Via Licensing or +directly from the patent owners, and therefore FDK AAC Codec software may +already be covered under those patent licenses when it is used for those +licensed purposes only. + +Commercially-licensed AAC software libraries, including floating-point versions +with enhanced sound quality, are also available from Fraunhofer. Users are +encouraged to check the Fraunhofer website for additional applications +information and documentation. 2. COPYRIGHT LICENSE -Redistribution and use in source and binary forms, with or without modification, are permitted without -payment of copyright license fees provided that you satisfy the following conditions: +Redistribution and use in source and binary forms, with or without modification, +are permitted without payment of copyright license fees provided that you +satisfy the following conditions: -You must retain the complete text of this software license in redistributions of the FDK AAC Codec or -your modifications thereto in source code form. +You must retain the complete text of this software license in redistributions of +the FDK AAC Codec or your modifications thereto in source code form. -You must retain the complete text of this software license in the documentation and/or other materials -provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. -You must make available free of charge copies of the complete source code of the FDK AAC Codec and your +You must retain the complete text of this software license in the documentation +and/or other materials provided with redistributions of the FDK AAC Codec or +your modifications thereto in binary form. You must make available free of +charge copies of the complete source code of the FDK AAC Codec and your modifications thereto to recipients of copies in binary form. -The name of Fraunhofer may not be used to endorse or promote products derived from this library without -prior written permission. +The name of Fraunhofer may not be used to endorse or promote products derived +from this library without prior written permission. -You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec -software or your modifications thereto. +You may not charge copyright license fees for anyone to use, copy or distribute +the FDK AAC Codec software or your modifications thereto. -Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software -and the date of any change. For modified versions of the FDK AAC Codec, the term -"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term -"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." +Your modified versions of the FDK AAC Codec must carry prominent notices stating +that you changed the software and the date of any change. For modified versions +of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android" +must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK +AAC Codec Library for Android." 3. NO PATENT LICENSE -NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, -ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with -respect to this software. +NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without +limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE. +Fraunhofer provides no warranty of patent non-infringement with respect to this +software. -You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized -by appropriate patent licenses. +You may use this FDK AAC Codec software or modifications thereto only for +purposes that are authorized by appropriate patent licenses. 4. DISCLAIMER -This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors -"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties -of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR -CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, -including but not limited to procurement of substitute goods or services; loss of use, data, or profits, -or business interruption, however caused and on any theory of liability, whether in contract, strict -liability, or tort (including negligence), arising in any way out of the use of this software, even if -advised of the possibility of such damage. +This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright +holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, +including but not limited to the implied warranties of merchantability and +fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR +CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, +or consequential damages, including but not limited to procurement of substitute +goods or services; loss of use, data, or profits, or business interruption, +however caused and on any theory of liability, whether in contract, strict +liability, or tort (including negligence), arising in any way out of the use of +this software, even if advised of the possibility of such damage. 5. CONTACT INFORMATION @@ -79,43 +90,37 @@ Am Wolfsmantel 33 www.iis.fraunhofer.de/amm amm-info@iis.fraunhofer.de ------------------------------------------------------------------------------------------------------------ */ +----------------------------------------------------------------------------- */ + +/**************************** AAC encoder library ****************************** -/******************************** MPEG Audio Encoder ************************** + Author(s): M. Lohwasser - Initial author: M. Lohwasser - contents/description: pns.c + Description: pns.c -******************************************************************************/ +*******************************************************************************/ #include "aacenc_pns.h" + #include "psy_data.h" #include "pnsparam.h" #include "noisedet.h" #include "bit_cnt.h" #include "interface.h" - /* minCorrelationEnergy = (1.0e-10f)^2 ~ 2^-67 = 2^-47 * 2^-20 */ -static const FIXP_DBL minCorrelationEnergy = FL2FXCONST_DBL(0.0); /* FL2FXCONST_DBL((float)FDKpow(2.0,-47)); */ +static const FIXP_DBL minCorrelationEnergy = + FL2FXCONST_DBL(0.0); /* FL2FXCONST_DBL((float)FDKpow(2.0,-47)); */ /* noiseCorrelationThresh = 0.6^2 */ static const FIXP_DBL noiseCorrelationThresh = FL2FXCONST_DBL(0.36); -static void FDKaacEnc_FDKaacEnc_noiseDetection( PNS_CONFIG *pnsConf, - PNS_DATA *pnsData, - const INT sfbActive, - const INT *sfbOffset, - INT tnsOrder, - INT tnsPredictionGain, - INT tnsActive, - FIXP_DBL *mdctSpectrum, - INT *sfbMaxScaleSpec, - FIXP_SGL *sfbtonality ); - -static void FDKaacEnc_CalcNoiseNrgs( const INT sfbActive, - INT *pnsFlag, - FIXP_DBL *sfbEnergyLdData, - INT *noiseNrg ); +static void FDKaacEnc_FDKaacEnc_noiseDetection( + PNS_CONFIG *pnsConf, PNS_DATA *pnsData, const INT sfbActive, + const INT *sfbOffset, INT tnsOrder, INT tnsPredictionGain, INT tnsActive, + FIXP_DBL *mdctSpectrum, INT *sfbMaxScaleSpec, FIXP_SGL *sfbtonality); + +static void FDKaacEnc_CalcNoiseNrgs(const INT sfbActive, INT *pnsFlag, + FIXP_DBL *sfbEnergyLdData, INT *noiseNrg); /***************************************************************************** @@ -129,28 +134,15 @@ static void FDKaacEnc_CalcNoiseNrgs( const INT sfbActive, *****************************************************************************/ -AAC_ENCODER_ERROR FDKaacEnc_InitPnsConfiguration(PNS_CONFIG *pnsConf, - INT bitRate, - INT sampleRate, - INT usePns, - INT sfbCnt, - const INT *sfbOffset, - const INT numChan, - const INT isLC) -{ +AAC_ENCODER_ERROR FDKaacEnc_InitPnsConfiguration( + PNS_CONFIG *pnsConf, INT bitRate, INT sampleRate, INT usePns, INT sfbCnt, + const INT *sfbOffset, const INT numChan, const INT isLC) { AAC_ENCODER_ERROR ErrorStatus; /* init noise detection */ - ErrorStatus = FDKaacEnc_GetPnsParam(&pnsConf->np, - bitRate, - sampleRate, - sfbCnt, - sfbOffset, - &usePns, - numChan, - isLC); - if (ErrorStatus != AAC_ENC_OK) - return ErrorStatus; + ErrorStatus = FDKaacEnc_GetPnsParam(&pnsConf->np, bitRate, sampleRate, sfbCnt, + sfbOffset, &usePns, numChan, isLC); + if (ErrorStatus != AAC_ENC_OK) return ErrorStatus; pnsConf->minCorrelationEnergy = minCorrelationEnergy; pnsConf->noiseCorrelationThresh = noiseCorrelationThresh; @@ -160,8 +152,6 @@ AAC_ENCODER_ERROR FDKaacEnc_InitPnsConfiguration(PNS_CONFIG *pnsConf, return AAC_ENC_OK; } - - /***************************************************************************** functionname: FDKaacEnc_PnsDetect @@ -180,73 +170,55 @@ AAC_ENCODER_ERROR FDKaacEnc_InitPnsConfiguration(PNS_CONFIG *pnsConf, output: pnsFlag in pns data structure *****************************************************************************/ -void FDKaacEnc_PnsDetect(PNS_CONFIG *pnsConf, - PNS_DATA *pnsData, - const INT lastWindowSequence, - const INT sfbActive, - const INT maxSfbPerGroup, - FIXP_DBL *sfbThresholdLdData, - const INT *sfbOffset, - FIXP_DBL *mdctSpectrum, - INT *sfbMaxScaleSpec, - FIXP_SGL *sfbtonality, - INT tnsOrder, - INT tnsPredictionGain, - INT tnsActive, - FIXP_DBL *sfbEnergyLdData, - INT *noiseNrg ) +void FDKaacEnc_PnsDetect(PNS_CONFIG *pnsConf, PNS_DATA *pnsData, + const INT lastWindowSequence, const INT sfbActive, + const INT maxSfbPerGroup, FIXP_DBL *sfbThresholdLdData, + const INT *sfbOffset, FIXP_DBL *mdctSpectrum, + INT *sfbMaxScaleSpec, FIXP_SGL *sfbtonality, + INT tnsOrder, INT tnsPredictionGain, INT tnsActive, + FIXP_DBL *sfbEnergyLdData, INT *noiseNrg) { int sfb; int startNoiseSfb; - if (pnsConf->np.detectionAlgorithmFlags & IS_LOW_COMLEXITY) { - if ( (!pnsConf->usePns) || /* pns enabled? */ - (lastWindowSequence == SHORT_WINDOW) ) /* currently only long blocks */ - { - FDKmemclear(pnsData->pnsFlag, MAX_GROUPED_SFB*sizeof(INT)); /* clear all pnsFlags */ - for (sfb=0; sfb<MAX_GROUPED_SFB; sfb++) { - noiseNrg[sfb] = NO_NOISE_PNS; /* clear nrg's of previous frame */ - } + /* Reset pns info. */ + FDKmemclear(pnsData->pnsFlag, sizeof(pnsData->pnsFlag)); + for (sfb = 0; sfb < MAX_GROUPED_SFB; sfb++) { + noiseNrg[sfb] = NO_NOISE_PNS; + } + + /* Disable PNS and skip detection in certain cases. */ + if (pnsConf->usePns == 0) { + return; + } else { + /* AAC - LC core encoder */ + if ((pnsConf->np.detectionAlgorithmFlags & IS_LOW_COMPLEXITY) && + (lastWindowSequence == SHORT_WINDOW)) { return; } - } - else { - if(!pnsConf->usePns) + /* AAC - (E)LD core encoder */ + if (!(pnsConf->np.detectionAlgorithmFlags & IS_LOW_COMPLEXITY) && + (pnsConf->np.detectionAlgorithmFlags & JUST_LONG_WINDOW) && + (lastWindowSequence != LONG_WINDOW)) { return; - - /* PNS only for long Windows */ - if (pnsConf->np.detectionAlgorithmFlags & JUST_LONG_WINDOW) { - if(lastWindowSequence != LONG_WINDOW) { - for (sfb = 0; sfb < sfbActive; sfb++) { - pnsData->pnsFlag[sfb] = 0; /* clear all pnsFlags */ - } - return; - } } } + /* call noise detection */ - FDKaacEnc_FDKaacEnc_noiseDetection( pnsConf, - pnsData, - sfbActive, - sfbOffset, - tnsOrder, - tnsPredictionGain, - tnsActive, - mdctSpectrum, - sfbMaxScaleSpec, - sfbtonality ); + FDKaacEnc_FDKaacEnc_noiseDetection( + pnsConf, pnsData, sfbActive, sfbOffset, tnsOrder, tnsPredictionGain, + tnsActive, mdctSpectrum, sfbMaxScaleSpec, sfbtonality); /* set startNoiseSfb (long) */ startNoiseSfb = pnsConf->np.startSfb; /* Set noise substitution status */ - for(sfb = 0; sfb < sfbActive; sfb++) { - + for (sfb = 0; sfb < sfbActive; sfb++) { /* No PNS below startNoiseSfb */ - if(sfb < startNoiseSfb){ + if (sfb < startNoiseSfb) { pnsData->pnsFlag[sfb] = 0; continue; } @@ -258,17 +230,17 @@ void FDKaacEnc_PnsDetect(PNS_CONFIG *pnsConf, signal in coder band is not masked */ - if((pnsData->noiseFuzzyMeasure[sfb] > FL2FXCONST_SGL(0.5)) && - ( (sfbThresholdLdData[sfb] + FL2FXCONST_DBL(0.5849625f/64.0f)) /* thr * 1.5 = thrLd +ld(1.5)/64 */ - < sfbEnergyLdData[sfb] ) ) - { + if ((pnsData->noiseFuzzyMeasure[sfb] > FL2FXCONST_SGL(0.5)) && + ((sfbThresholdLdData[sfb] + + FL2FXCONST_DBL(0.5849625f / + 64.0f)) /* thr * 1.5 = thrLd +ld(1.5)/64 */ + < sfbEnergyLdData[sfb])) { /* mark in psyout flag array that we will code this band with PNS */ pnsData->pnsFlag[sfb] = 1; /* PNS_ON */ - } - else{ + } else { pnsData->pnsFlag[sfb] = 0; /* PNS_OFF */ } @@ -276,50 +248,49 @@ void FDKaacEnc_PnsDetect(PNS_CONFIG *pnsConf, } /* avoid PNS holes */ - if((pnsData->noiseFuzzyMeasure[0]>FL2FXCONST_SGL(0.5f)) && (pnsData->pnsFlag[1])) { + if ((pnsData->noiseFuzzyMeasure[0] > FL2FXCONST_SGL(0.5f)) && + (pnsData->pnsFlag[1])) { pnsData->pnsFlag[0] = 1; } - for(sfb=1; sfb<maxSfbPerGroup-1; sfb++) { - if((pnsData->noiseFuzzyMeasure[sfb]>pnsConf->np.gapFillThr) && - (pnsData->pnsFlag[sfb-1]) && (pnsData->pnsFlag[sfb+1])) { + for (sfb = 1; sfb < maxSfbPerGroup - 1; sfb++) { + if ((pnsData->noiseFuzzyMeasure[sfb] > pnsConf->np.gapFillThr) && + (pnsData->pnsFlag[sfb - 1]) && (pnsData->pnsFlag[sfb + 1])) { pnsData->pnsFlag[sfb] = 1; } } - if(maxSfbPerGroup>0) { + if (maxSfbPerGroup > 0) { /* avoid PNS hole */ - if((pnsData->noiseFuzzyMeasure[maxSfbPerGroup-1]>pnsConf->np.gapFillThr) && (pnsData->pnsFlag[maxSfbPerGroup-2])) { - pnsData->pnsFlag[maxSfbPerGroup-1] = 1; + if ((pnsData->noiseFuzzyMeasure[maxSfbPerGroup - 1] > + pnsConf->np.gapFillThr) && + (pnsData->pnsFlag[maxSfbPerGroup - 2])) { + pnsData->pnsFlag[maxSfbPerGroup - 1] = 1; } /* avoid single PNS band */ - if(pnsData->pnsFlag[maxSfbPerGroup-2]==0) { - pnsData->pnsFlag[maxSfbPerGroup-1] = 0; + if (pnsData->pnsFlag[maxSfbPerGroup - 2] == 0) { + pnsData->pnsFlag[maxSfbPerGroup - 1] = 0; } } /* avoid single PNS bands */ - if(pnsData->pnsFlag[1]==0) { + if (pnsData->pnsFlag[1] == 0) { pnsData->pnsFlag[0] = 0; } - for(sfb=1; sfb<maxSfbPerGroup-1; sfb++) { - if((pnsData->pnsFlag[sfb-1]==0)&&(pnsData->pnsFlag[sfb+1]==0)) { + for (sfb = 1; sfb < maxSfbPerGroup - 1; sfb++) { + if ((pnsData->pnsFlag[sfb - 1] == 0) && (pnsData->pnsFlag[sfb + 1] == 0)) { pnsData->pnsFlag[sfb] = 0; } } - /* calculate noiseNrg's */ - FDKaacEnc_CalcNoiseNrgs( sfbActive, - pnsData->pnsFlag, - sfbEnergyLdData, - noiseNrg ); + FDKaacEnc_CalcNoiseNrgs(sfbActive, pnsData->pnsFlag, sfbEnergyLdData, + noiseNrg); } - /***************************************************************************** functionname:FDKaacEnc_FDKaacEnc_noiseDetection @@ -335,49 +306,36 @@ void FDKaacEnc_PnsDetect(PNS_CONFIG *pnsConf, flags tonal / nontonal *****************************************************************************/ -static void FDKaacEnc_FDKaacEnc_noiseDetection( PNS_CONFIG *pnsConf, - PNS_DATA *pnsData, - const INT sfbActive, - const INT *sfbOffset, - int tnsOrder, - INT tnsPredictionGain, - INT tnsActive, - FIXP_DBL *mdctSpectrum, - INT *sfbMaxScaleSpec, - FIXP_SGL *sfbtonality ) -{ - INT condition = TRUE; - if ( !(pnsConf->np.detectionAlgorithmFlags & IS_LOW_COMLEXITY) ) { - condition = (tnsOrder > 3); - } +static void FDKaacEnc_FDKaacEnc_noiseDetection( + PNS_CONFIG *pnsConf, PNS_DATA *pnsData, const INT sfbActive, + const INT *sfbOffset, int tnsOrder, INT tnsPredictionGain, INT tnsActive, + FIXP_DBL *mdctSpectrum, INT *sfbMaxScaleSpec, FIXP_SGL *sfbtonality) { + INT condition = TRUE; + if (!(pnsConf->np.detectionAlgorithmFlags & IS_LOW_COMPLEXITY)) { + condition = (tnsOrder > 3); + } + /* + no PNS if heavy TNS activity + clear pnsData->noiseFuzzyMeasure + */ + if ((pnsConf->np.detectionAlgorithmFlags & USE_TNS_GAIN_THR) && + (tnsPredictionGain >= pnsConf->np.tnsGainThreshold) && condition && + !((pnsConf->np.detectionAlgorithmFlags & USE_TNS_PNS) && + (tnsPredictionGain >= pnsConf->np.tnsPNSGainThreshold) && + (tnsActive))) { + /* clear all noiseFuzzyMeasure */ + FDKmemclear(pnsData->noiseFuzzyMeasure, sfbActive * sizeof(FIXP_SGL)); + } else { /* - no PNS if heavy TNS activity - clear pnsData->noiseFuzzyMeasure + call noise detection, output in pnsData->noiseFuzzyMeasure, + use real mdct spectral data */ - if((pnsConf->np.detectionAlgorithmFlags & USE_TNS_GAIN_THR) && - (tnsPredictionGain >= pnsConf->np.tnsGainThreshold) && condition && - !((pnsConf->np.detectionAlgorithmFlags & USE_TNS_PNS) && (tnsPredictionGain >= pnsConf->np.tnsPNSGainThreshold) && (tnsActive)) ) - { - /* clear all noiseFuzzyMeasure */ - FDKmemclear(pnsData->noiseFuzzyMeasure, sfbActive*sizeof(FIXP_SGL)); - } - else - { - /* - call noise detection, output in pnsData->noiseFuzzyMeasure, - use real mdct spectral data - */ - FDKaacEnc_noiseDetect( mdctSpectrum, - sfbMaxScaleSpec, - sfbActive, - sfbOffset, - pnsData->noiseFuzzyMeasure, - &pnsConf->np, - sfbtonality); - } + FDKaacEnc_noiseDetect(mdctSpectrum, sfbMaxScaleSpec, sfbActive, sfbOffset, + pnsData->noiseFuzzyMeasure, &pnsConf->np, + sfbtonality); + } } - /***************************************************************************** functionname:FDKaacEnc_CalcNoiseNrgs @@ -391,23 +349,21 @@ static void FDKaacEnc_FDKaacEnc_noiseDetection( PNS_CONFIG *pnsConf, *****************************************************************************/ -static void FDKaacEnc_CalcNoiseNrgs( const INT sfbActive, - INT *RESTRICT pnsFlag, - FIXP_DBL *RESTRICT sfbEnergyLdData, - INT *RESTRICT noiseNrg ) -{ +static void FDKaacEnc_CalcNoiseNrgs(const INT sfbActive, INT *RESTRICT pnsFlag, + FIXP_DBL *RESTRICT sfbEnergyLdData, + INT *RESTRICT noiseNrg) { int sfb; - INT tmp = (-LOG_NORM_PCM)<<2; + INT tmp = (-LOG_NORM_PCM) << 2; - for(sfb = 0; sfb < sfbActive; sfb++) { - if(pnsFlag[sfb]) { - INT nrg = (-sfbEnergyLdData[sfb]+FL2FXCONST_DBL(0.5f/64.0f))>>(DFRACT_BITS-1-7); + for (sfb = 0; sfb < sfbActive; sfb++) { + if (pnsFlag[sfb]) { + INT nrg = (-sfbEnergyLdData[sfb] + FL2FXCONST_DBL(0.5f / 64.0f)) >> + (DFRACT_BITS - 1 - 7); noiseNrg[sfb] = tmp - nrg; } } } - /***************************************************************************** functionname:FDKaacEnc_CodePnsChannel @@ -422,20 +378,18 @@ static void FDKaacEnc_CalcNoiseNrgs( const INT sfbActive, *****************************************************************************/ -void FDKaacEnc_CodePnsChannel(const INT sfbActive, - PNS_CONFIG *pnsConf, - INT *RESTRICT pnsFlag, - FIXP_DBL *RESTRICT sfbEnergyLdData, - INT *RESTRICT noiseNrg, - FIXP_DBL *RESTRICT sfbThresholdLdData) -{ +void FDKaacEnc_CodePnsChannel(const INT sfbActive, PNS_CONFIG *pnsConf, + INT *RESTRICT pnsFlag, + FIXP_DBL *RESTRICT sfbEnergyLdData, + INT *RESTRICT noiseNrg, + FIXP_DBL *RESTRICT sfbThresholdLdData) { INT sfb; INT lastiNoiseEnergy = 0; INT firstPNSband = 1; /* TRUE for first PNS-coded band */ /* no PNS */ - if(!pnsConf->usePns) { - for(sfb = 0; sfb < sfbActive; sfb++) { + if (!pnsConf->usePns) { + for (sfb = 0; sfb < sfbActive; sfb++) { /* no PNS coding */ noiseNrg[sfb] = NO_NOISE_PNS; } @@ -443,34 +397,32 @@ void FDKaacEnc_CodePnsChannel(const INT sfbActive, } /* code PNS */ - for(sfb = 0; sfb < sfbActive; sfb++) { - if(pnsFlag[sfb]) { + for (sfb = 0; sfb < sfbActive; sfb++) { + if (pnsFlag[sfb]) { /* high sfbThreshold causes pe = 0 */ - if(noiseNrg[sfb] != NO_NOISE_PNS) - sfbThresholdLdData[sfb] = sfbEnergyLdData[sfb] + FL2FXCONST_DBL(1.0f/LD_DATA_SCALING); + if (noiseNrg[sfb] != NO_NOISE_PNS) + sfbThresholdLdData[sfb] = + sfbEnergyLdData[sfb] + FL2FXCONST_DBL(1.0f / LD_DATA_SCALING); /* set noiseNrg in valid region */ - if(!firstPNSband) { + if (!firstPNSband) { INT deltaiNoiseEnergy = noiseNrg[sfb] - lastiNoiseEnergy; - if(deltaiNoiseEnergy > CODE_BOOK_PNS_LAV) - noiseNrg[sfb] -= deltaiNoiseEnergy - CODE_BOOK_PNS_LAV; - else if(deltaiNoiseEnergy < -CODE_BOOK_PNS_LAV) - noiseNrg[sfb] -= deltaiNoiseEnergy + CODE_BOOK_PNS_LAV; - } - else { + if (deltaiNoiseEnergy > CODE_BOOK_PNS_LAV) + noiseNrg[sfb] -= deltaiNoiseEnergy - CODE_BOOK_PNS_LAV; + else if (deltaiNoiseEnergy < -CODE_BOOK_PNS_LAV) + noiseNrg[sfb] -= deltaiNoiseEnergy + CODE_BOOK_PNS_LAV; + } else { firstPNSband = 0; } lastiNoiseEnergy = noiseNrg[sfb]; - } - else { + } else { /* no PNS coding */ noiseNrg[sfb] = NO_NOISE_PNS; } } } - /***************************************************************************** functionname:FDKaacEnc_PreProcessPnsChannelPair @@ -486,37 +438,40 @@ void FDKaacEnc_CodePnsChannel(const INT sfbActive, *****************************************************************************/ -void FDKaacEnc_PreProcessPnsChannelPair(const INT sfbActive, - FIXP_DBL *RESTRICT sfbEnergyLeft, - FIXP_DBL *RESTRICT sfbEnergyRight, - FIXP_DBL *RESTRICT sfbEnergyLeftLD, - FIXP_DBL *RESTRICT sfbEnergyRightLD, - FIXP_DBL *RESTRICT sfbEnergyMid, - PNS_CONFIG *RESTRICT pnsConf, - PNS_DATA *pnsDataLeft, - PNS_DATA *pnsDataRight) -{ +void FDKaacEnc_PreProcessPnsChannelPair( + const INT sfbActive, FIXP_DBL *RESTRICT sfbEnergyLeft, + FIXP_DBL *RESTRICT sfbEnergyRight, FIXP_DBL *RESTRICT sfbEnergyLeftLD, + FIXP_DBL *RESTRICT sfbEnergyRightLD, FIXP_DBL *RESTRICT sfbEnergyMid, + PNS_CONFIG *RESTRICT pnsConf, PNS_DATA *pnsDataLeft, + PNS_DATA *pnsDataRight) { INT sfb; FIXP_DBL ccf; - if(!pnsConf->usePns) - return; + if (!pnsConf->usePns) return; - FIXP_DBL *RESTRICT pNoiseEnergyCorrelationL = pnsDataLeft->noiseEnergyCorrelation; - FIXP_DBL *RESTRICT pNoiseEnergyCorrelationR = pnsDataRight->noiseEnergyCorrelation; + FIXP_DBL *RESTRICT pNoiseEnergyCorrelationL = + pnsDataLeft->noiseEnergyCorrelation; + FIXP_DBL *RESTRICT pNoiseEnergyCorrelationR = + pnsDataRight->noiseEnergyCorrelation; - for(sfb=0;sfb< sfbActive;sfb++) { - FIXP_DBL quot = (sfbEnergyLeftLD[sfb]>>1) + (sfbEnergyRightLD[sfb]>>1); + for (sfb = 0; sfb < sfbActive; sfb++) { + FIXP_DBL quot = (sfbEnergyLeftLD[sfb] >> 1) + (sfbEnergyRightLD[sfb] >> 1); - if(quot < FL2FXCONST_DBL(-32.0f/(float)LD_DATA_SCALING)) + if (quot < FL2FXCONST_DBL(-32.0f / (float)LD_DATA_SCALING)) ccf = FL2FXCONST_DBL(0.0f); else { - FIXP_DBL accu = sfbEnergyMid[sfb]- (((sfbEnergyLeft[sfb]>>1)+(sfbEnergyRight[sfb]>>1))>>1); - INT sign = (accu < FL2FXCONST_DBL(0.0f)) ? 1 : 0 ; + FIXP_DBL accu = + sfbEnergyMid[sfb] - + (((sfbEnergyLeft[sfb] >> 1) + (sfbEnergyRight[sfb] >> 1)) >> 1); + INT sign = (accu < FL2FXCONST_DBL(0.0f)) ? 1 : 0; accu = fixp_abs(accu); - ccf = CalcLdData(accu) + FL2FXCONST_DBL((float)1.0f/(float)LD_DATA_SCALING) - quot; /* ld(accu*2) = ld(accu) + 1 */ - ccf = (ccf>=FL2FXCONST_DBL(0.0)) ? ((FIXP_DBL)MAXVAL_DBL) : (sign) ? -CalcInvLdData(ccf) : CalcInvLdData(ccf); + ccf = CalcLdData(accu) + + FL2FXCONST_DBL((float)1.0f / (float)LD_DATA_SCALING) - + quot; /* ld(accu*2) = ld(accu) + 1 */ + ccf = (ccf >= FL2FXCONST_DBL(0.0)) + ? ((FIXP_DBL)MAXVAL_DBL) + : (sign) ? -CalcInvLdData(ccf) : CalcInvLdData(ccf); } pNoiseEnergyCorrelationL[sfb] = ccf; @@ -524,8 +479,6 @@ void FDKaacEnc_PreProcessPnsChannelPair(const INT sfbActive, } } - - /***************************************************************************** functionname:FDKaacEnc_PostProcessPnsChannelPair @@ -542,33 +495,29 @@ void FDKaacEnc_PreProcessPnsChannelPair(const INT sfbActive, *****************************************************************************/ -void FDKaacEnc_PostProcessPnsChannelPair(const INT sfbActive, - PNS_CONFIG *pnsConf, - PNS_DATA *pnsDataLeft, - PNS_DATA *pnsDataRight, - INT *RESTRICT msMask, - INT *msDigest ) -{ +void FDKaacEnc_PostProcessPnsChannelPair(const INT sfbActive, + PNS_CONFIG *pnsConf, + PNS_DATA *pnsDataLeft, + PNS_DATA *pnsDataRight, + INT *RESTRICT msMask, INT *msDigest) { INT sfb; - if(!pnsConf->usePns) - return; + if (!pnsConf->usePns) return; - for(sfb=0;sfb<sfbActive;sfb++) { + for (sfb = 0; sfb < sfbActive; sfb++) { /* MS post processing */ - if( msMask[sfb] ) { - if( (pnsDataLeft->pnsFlag[sfb]) && - (pnsDataRight->pnsFlag[sfb]) ) { + if (msMask[sfb]) { + if ((pnsDataLeft->pnsFlag[sfb]) && (pnsDataRight->pnsFlag[sfb])) { /* AAC only: Standard */ /* do this to avoid ms flags in layers that should not have it */ - if(pnsDataLeft->noiseEnergyCorrelation[sfb] <= pnsConf->noiseCorrelationThresh){ + if (pnsDataLeft->noiseEnergyCorrelation[sfb] <= + pnsConf->noiseCorrelationThresh) { msMask[sfb] = 0; *msDigest = MS_SOME; } - } - else { + } else { /* No PNS coding */ @@ -581,8 +530,9 @@ void FDKaacEnc_PostProcessPnsChannelPair(const INT sfbActive, Use MS flag to signal noise correlation if pns is active in both channels */ - if( (pnsDataLeft->pnsFlag[sfb]) && (pnsDataRight->pnsFlag[sfb]) ) { - if(pnsDataLeft->noiseEnergyCorrelation[sfb] > pnsConf->noiseCorrelationThresh) { + if ((pnsDataLeft->pnsFlag[sfb]) && (pnsDataRight->pnsFlag[sfb])) { + if (pnsDataLeft->noiseEnergyCorrelation[sfb] > + pnsConf->noiseCorrelationThresh) { msMask[sfb] = 1; *msDigest = MS_SOME; } |