psy_main.cpp - Android社区 - https://www.androidos.net.cn/

/* -----------------------------------------------------------------------------------------------------------
Software License for The Fraunhofer FDK AAC Codec Library for Android

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.

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:

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.

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You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
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This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
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5.    CONTACT INFORMATION

Fraunhofer Institute for Integrated Circuits IIS
Attention: Audio and Multimedia Departments - FDK AAC LL
Am Wolfsmantel 33
91058 Erlangen, Germany

www.iis.fraunhofer.de/amm
amm-info@iis.fraunhofer.de
----------------------------------------------------------------------------------------------------------- */

/******************************** MPEG Audio Encoder **************************

Initial author:       M.Werner
   contents/description: Psychoaccoustic major function block

******************************************************************************/

#include "psy_const.h"

#include "block_switch.h"
#include "transform.h"
#include "spreading.h"
#include "pre_echo_control.h"
#include "band_nrg.h"
#include "psy_configuration.h"
#include "psy_data.h"
#include "ms_stereo.h"
#include "interface.h"
#include "psy_main.h"
#include "grp_data.h"
#include "tns_func.h"
#include "pns_func.h"
#include "tonality.h"
#include "aacEnc_ram.h"
#include "intensity.h"

/* blending to reduce gibbs artifacts */
#define FADE_OUT_LEN 6
static const FIXP_DBL fadeOutFactor[FADE_OUT_LEN] = {1840644096, 1533870080, 1227096064, 920322048, 613548032, 306774016};

/* forward definitions */

static inline int isLowDelay( AUDIO_OBJECT_TYPE aot )
{
  return (aot==AOT_ER_AAC_LD || aot==AOT_ER_AAC_ELD);
}

/*****************************************************************************

functionname: FDKaacEnc_PsyNew
    description:  allocates memory for psychoacoustic
    returns:      an error code
    input:        pointer to a psych handle

*****************************************************************************/
AAC_ENCODER_ERROR FDKaacEnc_PsyNew(PSY_INTERNAL  **phpsy,
                                   const INT       nElements,
                                   const INT       nChannels
                                  ,UCHAR          *dynamic_RAM
                                  )
{
    AAC_ENCODER_ERROR ErrorStatus;
    PSY_INTERNAL *hPsy;
    INT i;

hPsy = GetRam_aacEnc_PsyInternal();
    *phpsy = hPsy;
    if (hPsy == NULL) {
      ErrorStatus = AAC_ENC_NO_MEMORY;
      goto bail;
    }

for (i=0; i<nElements; i++) {
        /* PSY_ELEMENT */
        hPsy->psyElement[i] = GetRam_aacEnc_PsyElement(i);
        if (hPsy->psyElement[i] == NULL) {
          ErrorStatus = AAC_ENC_NO_MEMORY;
          goto bail;
        }
    }

for (i=0; i<nChannels; i++) {
        /* PSY_STATIC */
        hPsy->pStaticChannels[i] = GetRam_aacEnc_PsyStatic(i);
        if (hPsy->pStaticChannels[i]==NULL) {
          ErrorStatus = AAC_ENC_NO_MEMORY;
          goto bail;
        }
        /* AUDIO INPUT BUFFER */
        hPsy->pStaticChannels[i]->psyInputBuffer = GetRam_aacEnc_PsyInputBuffer(i);
        if (hPsy->pStaticChannels[i]->psyInputBuffer==NULL) {
          ErrorStatus = AAC_ENC_NO_MEMORY;
          goto bail;
        }
    }

/* reusable psych memory */
    hPsy->psyDynamic = GetRam_aacEnc_PsyDynamic(0, dynamic_RAM);

return AAC_ENC_OK;

bail:
   FDKaacEnc_PsyClose(phpsy, NULL);

return ErrorStatus;
}

/*****************************************************************************

functionname: FDKaacEnc_PsyOutNew
    description:  allocates memory for psyOut struc
    returns:      an error code
    input:        pointer to a psych handle

*****************************************************************************/
AAC_ENCODER_ERROR FDKaacEnc_PsyOutNew(PSY_OUT   **phpsyOut,
                                      const INT   nElements,
                                      const INT   nChannels,
                                      const INT   nSubFrames
                                     ,UCHAR      *dynamic_RAM
                                     )
{
  AAC_ENCODER_ERROR ErrorStatus;
  int n, i;
  int elInc = 0, chInc = 0;

for (n=0; n<nSubFrames; n++) {
    phpsyOut[n] = GetRam_aacEnc_PsyOut(n);

if (phpsyOut[n] == NULL) {
      ErrorStatus = AAC_ENC_NO_MEMORY;
      goto bail;
    }

for (i=0; i<nChannels; i++) {
      phpsyOut[n]->pPsyOutChannels[i] = GetRam_aacEnc_PsyOutChannel(chInc++);
    }

for (i=0; i<nElements; i++) {
      phpsyOut[n]->psyOutElement[i] = GetRam_aacEnc_PsyOutElements(elInc++);
      if (phpsyOut[n]->psyOutElement[i] == NULL) {
        ErrorStatus = AAC_ENC_NO_MEMORY;
        goto bail;
      }
    }
  } /* nSubFrames */

return AAC_ENC_OK;

bail:
  FDKaacEnc_PsyClose(NULL, phpsyOut);
  return ErrorStatus;
}

AAC_ENCODER_ERROR FDKaacEnc_psyInitStates(PSY_INTERNAL    *hPsy,
                                          PSY_STATIC* psyStatic,
                                          AUDIO_OBJECT_TYPE audioObjectType)
{
  /* init input buffer */
  FDKmemclear(psyStatic->psyInputBuffer, MAX_INPUT_BUFFER_SIZE*sizeof(INT_PCM));

FDKaacEnc_InitBlockSwitching(&psyStatic->blockSwitchingControl,
                                isLowDelay(audioObjectType)
                               );

return AAC_ENC_OK;
}

AAC_ENCODER_ERROR FDKaacEnc_psyInit(PSY_INTERNAL    *hPsy,
                                    PSY_OUT        **phpsyOut,
                                    const INT        nSubFrames,
                                    const INT        nMaxChannels,
                                    const AUDIO_OBJECT_TYPE audioObjectType,
                                    CHANNEL_MAPPING *cm)
{
  AAC_ENCODER_ERROR ErrorStatus = AAC_ENC_OK;
  int i, ch, n, chInc = 0, resetChannels = 3;

if ( (nMaxChannels>2) && (cm->nChannels==2) ) {
    chInc = 1;
    FDKaacEnc_psyInitStates(hPsy, hPsy->pStaticChannels[0], audioObjectType);
  }

if ( (nMaxChannels==2) ) {
    resetChannels = 0;
  }

for (i=0; i<cm->nElements; i++) {
    for (ch=0; ch<cm->elInfo[i].nChannelsInEl; ch++) {
      if (cm->elInfo[i].elType!=ID_LFE) {
        hPsy->psyElement[i]->psyStatic[ch] = hPsy->pStaticChannels[chInc];
        if (chInc>=resetChannels) {
            FDKaacEnc_psyInitStates(hPsy, hPsy->psyElement[i]->psyStatic[ch], audioObjectType);
        }
        hPsy->psyElement[i]->psyStatic[ch]->isLFE = 0;
      }
      else {
        hPsy->psyElement[i]->psyStatic[ch] = hPsy->pStaticChannels[nMaxChannels-1];
        hPsy->psyElement[i]->psyStatic[ch]->isLFE = 1;
      }
      chInc++;
    }
  }

for (n=0; n<nSubFrames; n++) {
    chInc = 0;
    for (i=0; i<cm->nElements; i++) {
      for (ch=0; ch<cm->elInfo[i].nChannelsInEl; ch++) {
        phpsyOut[n]->psyOutElement[i]->psyOutChannel[ch] = phpsyOut[n]->pPsyOutChannels[chInc++];
      }
    }
  }

return ErrorStatus;
}

/*****************************************************************************

functionname: FDKaacEnc_psyMainInit
    description:  initializes psychoacoustic
    returns:      an error code

*****************************************************************************/

AAC_ENCODER_ERROR FDKaacEnc_psyMainInit(PSY_INTERNAL *hPsy,
                                        AUDIO_OBJECT_TYPE audioObjectType,
                                        CHANNEL_MAPPING *cm,
                                        INT sampleRate,
                                        INT granuleLength,
                                        INT bitRate,
                                        INT tnsMask,
                                        INT bandwidth,
                                        INT usePns,
                                        INT useIS,
                                        UINT syntaxFlags,
                                        ULONG initFlags)
{
  AAC_ENCODER_ERROR ErrorStatus;
  int i, ch;
  int channelsEff = cm->nChannelsEff;
  int tnsChannels = 0;
  FB_TYPE filterBank;

switch(FDKaacEnc_GetMonoStereoMode(cm->encMode)) {
    /* ... and map to tnsChannels */
    case EL_MODE_MONO:   tnsChannels = 1; break;
    case EL_MODE_STEREO: tnsChannels = 2; break;
    default:             tnsChannels = 0;
  }

switch (audioObjectType)
  {
    default: filterBank = FB_LC;  break;
    case AOT_ER_AAC_LD:  filterBank = FB_LD;  break;
    case AOT_ER_AAC_ELD: filterBank = FB_ELD; break;
  }

hPsy->granuleLength = granuleLength;

ErrorStatus = FDKaacEnc_InitPsyConfiguration(bitRate/channelsEff, sampleRate, bandwidth, LONG_WINDOW, hPsy->granuleLength, useIS, &(hPsy->psyConf[0]), filterBank);
  if (ErrorStatus != AAC_ENC_OK)
    return ErrorStatus;

ErrorStatus = FDKaacEnc_InitTnsConfiguration(
        (bitRate*tnsChannels)/channelsEff,
        sampleRate,
        tnsChannels,
        LONG_WINDOW,
        hPsy->granuleLength,
        (syntaxFlags&AC_SBR_PRESENT)?1:0,
       &(hPsy->psyConf[0].tnsConf),
       &hPsy->psyConf[0],
        (INT)(tnsMask&2),
        (INT)(tnsMask&8) );

if (ErrorStatus != AAC_ENC_OK)
    return ErrorStatus;

if (granuleLength > 512) {
    ErrorStatus = FDKaacEnc_InitPsyConfiguration(bitRate/channelsEff, sampleRate, bandwidth, SHORT_WINDOW, hPsy->granuleLength, useIS, &hPsy->psyConf[1], filterBank);
    if (ErrorStatus != AAC_ENC_OK)
      return ErrorStatus;

ErrorStatus = FDKaacEnc_InitTnsConfiguration(
            (bitRate*tnsChannels)/channelsEff,
            sampleRate,
            tnsChannels,
            SHORT_WINDOW,
            hPsy->granuleLength,
            (syntaxFlags&AC_SBR_PRESENT)?1:0,
           &hPsy->psyConf[1].tnsConf,
           &hPsy->psyConf[1],
            (INT)(tnsMask&1),
            (INT)(tnsMask&4) );

if (ErrorStatus != AAC_ENC_OK)
    return ErrorStatus;

}

for (i=0; i<cm->nElements; i++) {
    for (ch=0; ch<cm->elInfo[i].nChannelsInEl; ch++) {
      if (initFlags) {
        /* reset states */
        FDKaacEnc_psyInitStates(hPsy, hPsy->psyElement[i]->psyStatic[ch], audioObjectType);
      }

FDKaacEnc_InitPreEchoControl(hPsy->psyElement[i]->psyStatic[ch]->sfbThresholdnm1,
                                  &hPsy->psyElement[i]->psyStatic[ch]->calcPreEcho,
                                   hPsy->psyConf[0].sfbCnt,
                                   hPsy->psyConf[0].sfbPcmQuantThreshold,
                                  &hPsy->psyElement[i]->psyStatic[ch]->mdctScalenm1);
    }
  }

ErrorStatus = FDKaacEnc_InitPnsConfiguration(&hPsy->psyConf[0].pnsConf,
                                               bitRate/channelsEff,
                                               sampleRate,
                                               usePns,
                                               hPsy->psyConf[0].sfbCnt,
                                               hPsy->psyConf[0].sfbOffset,
                                               cm->elInfo[0].nChannelsInEl,
                                               (hPsy->psyConf[0].filterbank == FB_LC));
  if (ErrorStatus != AAC_ENC_OK)
    return ErrorStatus;

ErrorStatus = FDKaacEnc_InitPnsConfiguration(&hPsy->psyConf[1].pnsConf,
                                               bitRate/channelsEff,
                                               sampleRate,
                                               usePns,
                                               hPsy->psyConf[1].sfbCnt,
                                               hPsy->psyConf[1].sfbOffset,
                                               cm->elInfo[1].nChannelsInEl,
                                               (hPsy->psyConf[1].filterbank == FB_LC));
  return ErrorStatus;
}

static
void FDKaacEnc_deinterleaveInputBuffer(INT_PCM *pOutputSamples,
                                       INT_PCM *pInputSamples,
                                       INT nSamples,
                                       INT nChannels)
{
    INT k;
    /* deinterlave input samples and write to output buffer */
    for (k=0; k<nSamples; k++) {
        pOutputSamples[k] = pInputSamples[k*nChannels];
    }
}

/*****************************************************************************

functionname: FDKaacEnc_psyMain
    description:  psychoacoustic
    returns:      an error code

This function assumes that enough input data is in the modulo buffer.

*****************************************************************************/

AAC_ENCODER_ERROR FDKaacEnc_psyMain(INT                 channels,
                                    PSY_ELEMENT        *psyElement,
                                    PSY_DYNAMIC        *psyDynamic,
                                    PSY_CONFIGURATION  *psyConf,
                                    PSY_OUT_ELEMENT    *RESTRICT psyOutElement,
                                    INT_PCM             *pInput,
                                    INT                 *chIdx,
                                    INT                  totalChannels
                                   )
{
    INT commonWindow = 1;
    INT maxSfbPerGroup[(2)];
    INT mdctSpectrum_e;
    INT ch;   /* counts through channels          */
    INT w;    /* counts through windows           */
    INT sfb;  /* counts through scalefactor bands */
    INT line; /* counts through lines             */

PSY_CONFIGURATION *RESTRICT hPsyConfLong  = &psyConf[0];
    PSY_CONFIGURATION *RESTRICT hPsyConfShort = &psyConf[1];
    PSY_OUT_CHANNEL  **RESTRICT psyOutChannel = psyOutElement->psyOutChannel;
    FIXP_SGL sfbTonality[(2)][MAX_SFB_LONG];

PSY_STATIC        **RESTRICT psyStatic = psyElement->psyStatic;

PSY_DATA           *RESTRICT psyData[(2)];
    TNS_DATA           *RESTRICT tnsData[(2)];
    PNS_DATA           *RESTRICT pnsData[(2)];

INT zeroSpec = TRUE; /* means all spectral lines are zero */

INT blockSwitchingOffset;

PSY_CONFIGURATION *RESTRICT hThisPsyConf[(2)];
    INT windowLength[(2)];
    INT nWindows[(2)];
    INT wOffset;

INT       maxSfb[(2)];
    INT      *pSfbMaxScaleSpec[(2)];
    FIXP_DBL *pSfbEnergy[(2)];
    FIXP_DBL *pSfbSpreadEnergy[(2)];
    FIXP_DBL *pSfbEnergyLdData[(2)];
    FIXP_DBL *pSfbEnergyMS[(2)];
    FIXP_DBL *pSfbThreshold[(2)];

INT isShortWindow[(2)];

if (hPsyConfLong->filterbank == FB_LC) {
      blockSwitchingOffset = psyConf->granuleLength + (9*psyConf->granuleLength/(2*TRANS_FAC));
    } else {
      blockSwitchingOffset = psyConf->granuleLength;
    }

for(ch = 0; ch < channels; ch++)
    {
        psyData[ch] = &psyDynamic->psyData[ch];
        tnsData[ch] = &psyDynamic->tnsData[ch];
        pnsData[ch] = &psyDynamic->pnsData[ch];

psyData[ch]->mdctSpectrum = psyOutChannel[ch]->mdctSpectrum;
    }

/* block switching */
    if (hPsyConfLong->filterbank != FB_ELD)
    {
      int err;

for(ch = 0; ch < channels; ch++)
      {
          C_ALLOC_SCRATCH_START(timeSignal, INT_PCM, (1024));
          psyStatic[ch]->blockSwitchingControl.timeSignal = timeSignal;

/* deinterleave input data and use for block switching */
          FDKaacEnc_deinterleaveInputBuffer( psyStatic[ch]->blockSwitchingControl.timeSignal,
                                            &pInput[chIdx[ch]],
                                             psyConf->granuleLength,
                                             totalChannels);

FDKaacEnc_BlockSwitching (&psyStatic[ch]->blockSwitchingControl,
                                     psyConf->granuleLength
                                    ,psyStatic[ch]->isLFE
                                   );

/* fill up internal input buffer, to 2xframelength samples */
            FDKmemcpy(psyStatic[ch]->psyInputBuffer+blockSwitchingOffset,
                      psyStatic[ch]->blockSwitchingControl.timeSignal,
                      (2*psyConf->granuleLength-blockSwitchingOffset)*sizeof(INT_PCM));

C_ALLOC_SCRATCH_END(timeSignal, INT_PCM, (1024));
      }

/* synch left and right block type */
      err = FDKaacEnc_SyncBlockSwitching(&psyStatic[0]->blockSwitchingControl,
                                         &psyStatic[1]->blockSwitchingControl,
                                          channels,
                                          commonWindow);

if (err) {
          return AAC_ENC_UNSUPPORTED_AOT; /* mixed up LC and LD */
      }

}
    else {
      for(ch = 0; ch < channels; ch++)
      {
        /* deinterleave input data and use for block switching */
        FDKaacEnc_deinterleaveInputBuffer( psyStatic[ch]->psyInputBuffer + blockSwitchingOffset,
                                          &pInput[chIdx[ch]],
                                           psyConf->granuleLength,
                                           totalChannels);
      }
    }

for(ch = 0; ch < channels; ch++)
      isShortWindow[ch]=(psyStatic[ch]->blockSwitchingControl.lastWindowSequence == SHORT_WINDOW);

/* set parameters according to window length */
    for(ch = 0; ch < channels; ch++)
    {
        if(isShortWindow[ch]) {
            hThisPsyConf[ch]       = hPsyConfShort;
            windowLength[ch]       = psyConf->granuleLength/TRANS_FAC;
            nWindows[ch]           = TRANS_FAC;
            maxSfb[ch]             = MAX_SFB_SHORT;

pSfbMaxScaleSpec[ch]   = psyData[ch]->sfbMaxScaleSpec.Short[0];
            pSfbEnergy[ch]         = psyData[ch]->sfbEnergy.Short[0];
            pSfbSpreadEnergy[ch]   = psyData[ch]->sfbSpreadEnergy.Short[0];
            pSfbEnergyLdData[ch]   = psyData[ch]->sfbEnergyLdData.Short[0];
            pSfbEnergyMS[ch]       = psyData[ch]->sfbEnergyMS.Short[0];
            pSfbThreshold[ch]      = psyData[ch]->sfbThreshold.Short[0];

} else
        {
            hThisPsyConf[ch]       = hPsyConfLong;
            windowLength[ch]       = psyConf->granuleLength;
            nWindows[ch]           = 1;
            maxSfb[ch]             = MAX_GROUPED_SFB;

pSfbMaxScaleSpec[ch]   = psyData[ch]->sfbMaxScaleSpec.Long;
            pSfbEnergy[ch]         = psyData[ch]->sfbEnergy.Long;
            pSfbSpreadEnergy[ch]   = psyData[ch]->sfbSpreadEnergy.Long;
            pSfbEnergyLdData[ch]   = psyData[ch]->sfbEnergyLdData.Long;
            pSfbEnergyMS[ch]       = psyData[ch]->sfbEnergyMS.Long;
            pSfbThreshold[ch]      = psyData[ch]->sfbThreshold.Long;
        }
    }

/* Transform and get mdctScaling for all channels and windows. */
    for(ch = 0; ch < channels; ch++)
    {
        /* update number of active bands */
        if (psyStatic[ch]->isLFE) {
            psyData[ch]->sfbActive = hThisPsyConf[ch]->sfbActiveLFE;
            psyData[ch]->lowpassLine = hThisPsyConf[ch]->lowpassLineLFE;
        } else
        {
            psyData[ch]->sfbActive = hThisPsyConf[ch]->sfbActive;
            psyData[ch]->lowpassLine = hThisPsyConf[ch]->lowpassLine;
        }

for(w = 0; w < nWindows[ch]; w++) {

wOffset = w*windowLength[ch];

FDKaacEnc_Transform_Real( psyStatic[ch]->psyInputBuffer + wOffset,
                                    psyData[ch]->mdctSpectrum+wOffset,
                                    psyStatic[ch]->blockSwitchingControl.lastWindowSequence,
                                    psyStatic[ch]->blockSwitchingControl.windowShape,
                                   &psyStatic[ch]->blockSwitchingControl.lastWindowShape,
                                    psyConf->granuleLength,
                                   &mdctSpectrum_e,
                                    hThisPsyConf[ch]->filterbank
                                   ,psyStatic[ch]->overlapAddBuffer
                                   );

/* Low pass / highest sfb */
          FDKmemclear(&psyData[ch]->mdctSpectrum[psyData[ch]->lowpassLine+wOffset],
                      (windowLength[ch]-psyData[ch]->lowpassLine)*sizeof(FIXP_DBL));

if (hPsyConfLong->filterbank != FB_LC) {
            /* Do blending to reduce gibbs artifacts */
            for (int i=0; i<FADE_OUT_LEN; i++) {
              psyData[ch]->mdctSpectrum[psyData[ch]->lowpassLine+wOffset - FADE_OUT_LEN + i] = fMult(psyData[ch]->mdctSpectrum[psyData[ch]->lowpassLine+wOffset - FADE_OUT_LEN + i], fadeOutFactor[i]);
            }
          }

/* Check for zero spectrum. These loops will usually terminate very, very early. */
          for(line=0; (line<psyData[ch]->lowpassLine) && (zeroSpec==TRUE); line++) {
              if (psyData[ch]->mdctSpectrum[line+wOffset] != (FIXP_DBL)0) {
                  zeroSpec = FALSE;
                  break;
              }
          }

} /* w loop */

psyData[ch]->mdctScale = mdctSpectrum_e;

/* rotate internal time samples */
        FDKmemmove(psyStatic[ch]->psyInputBuffer,
                   psyStatic[ch]->psyInputBuffer+psyConf->granuleLength,
                   psyConf->granuleLength*sizeof(INT_PCM));

/* ... and get remaining samples from input buffer */
        FDKaacEnc_deinterleaveInputBuffer( psyStatic[ch]->psyInputBuffer+psyConf->granuleLength,
                                          &pInput[ (2*psyConf->granuleLength-blockSwitchingOffset)*totalChannels + chIdx[ch] ],
                                           blockSwitchingOffset-psyConf->granuleLength,
                                           totalChannels);

} /* ch */

/* Do some rescaling to get maximum possible accuracy for energies */
    if ( zeroSpec == FALSE) {

/* Calc possible spectrum leftshift for each sfb (1 means: 1 bit left shift is possible without overflow) */
        INT minSpecShift = MAX_SHIFT_DBL;
        INT nrgShift     = MAX_SHIFT_DBL;
        INT finalShift   = MAX_SHIFT_DBL;
        FIXP_DBL currNrg = 0;
        FIXP_DBL maxNrg  = 0;

for(ch = 0; ch < channels; ch++) {
            for(w = 0; w < nWindows[ch]; w++) {
                wOffset = w*windowLength[ch];
                FDKaacEnc_CalcSfbMaxScaleSpec(psyData[ch]->mdctSpectrum+wOffset,
                                              hThisPsyConf[ch]->sfbOffset,
                                              pSfbMaxScaleSpec[ch]+w*maxSfb[ch],
                                              psyData[ch]->sfbActive);

for (sfb = 0; sfb<psyData[ch]->sfbActive; sfb++)
                    minSpecShift = fixMin(minSpecShift, (pSfbMaxScaleSpec[ch]+w*maxSfb[ch])[sfb]);
            }

}

/* Calc possible energy leftshift for each sfb (1 means: 1 bit left shift is possible without overflow) */
        for(ch = 0; ch < channels; ch++) {
            for(w = 0; w < nWindows[ch]; w++) {
                wOffset = w*windowLength[ch];
                currNrg = FDKaacEnc_CheckBandEnergyOptim(psyData[ch]->mdctSpectrum+wOffset,
                                                        pSfbMaxScaleSpec[ch]+w*maxSfb[ch],
                                                        hThisPsyConf[ch]->sfbOffset,
                                                        psyData[ch]->sfbActive,
                                                        pSfbEnergy[ch]+w*maxSfb[ch],
                                                        pSfbEnergyLdData[ch]+w*maxSfb[ch],
                                                        minSpecShift-4);

maxNrg = fixMax(maxNrg, currNrg);
            }
        }

if ( maxNrg != (FIXP_DBL)0 ) {
            nrgShift = (CountLeadingBits(maxNrg)>>1) + (minSpecShift-4);
        }

/* 2check: Hasn't this decision to be made for both channels? */
        /* For short windows 1 additional bit headroom is necessary to prevent overflows when summing up energies in FDKaacEnc_groupShortData() */
        if(isShortWindow[0]) nrgShift--;

/* both spectrum and energies mustn't overflow */
        finalShift = fixMin(minSpecShift, nrgShift);

/* do not shift more than 3 bits more to the left than signal without blockfloating point
         * would be to avoid overflow of scaled PCM quantization thresholds */
        if (finalShift > psyData[0]->mdctScale + 3 )
            finalShift = psyData[0]->mdctScale + 3;

FDK_ASSERT(finalShift >= 0);    /* right shift is not allowed */

/* correct sfbEnergy and sfbEnergyLdData with new finalShift */
        FIXP_DBL ldShift = finalShift * FL2FXCONST_DBL(2.0/64);
        for(ch = 0; ch < channels; ch++) {
            for(w = 0; w < nWindows[ch]; w++) {
                for(sfb=0; sfb<psyData[ch]->sfbActive; sfb++) {
                    INT scale = fixMax(0, (pSfbMaxScaleSpec[ch]+w*maxSfb[ch])[sfb]-4);
                    scale     = fixMin((scale-finalShift)<<1, DFRACT_BITS-1);
                    if (scale >= 0) (pSfbEnergy[ch]+w*maxSfb[ch])[sfb] >>= (scale);
                    else            (pSfbEnergy[ch]+w*maxSfb[ch])[sfb] <<= (-scale);
                    (pSfbThreshold[ch]+w*maxSfb[ch])[sfb] = fMult((pSfbEnergy[ch]+w*maxSfb[ch])[sfb], C_RATIO);
                    (pSfbEnergyLdData[ch]+w*maxSfb[ch])[sfb] += ldShift;
                }
            }
        }

if ( finalShift != 0 ) {
            for (ch = 0; ch < channels; ch++) {
                for(w = 0; w < nWindows[ch]; w++) {
                    wOffset = w*windowLength[ch];
                    for(line=0; line<psyData[ch]->lowpassLine; line++) {
                        psyData[ch]->mdctSpectrum[line+wOffset] <<= finalShift;
                    }
                    /* update sfbMaxScaleSpec */
                    for (sfb = 0; sfb<psyData[ch]->sfbActive; sfb++)
                        (pSfbMaxScaleSpec[ch]+w*maxSfb[ch])[sfb] -= finalShift;
                }
                /* update mdctScale */
                psyData[ch]->mdctScale -= finalShift;
            }
        }

} else {
        /* all spectral lines are zero */
        for (ch = 0; ch < channels; ch++) {
            psyData[ch]->mdctScale = 0;     /* otherwise mdctScale would be for example 7 and PCM quantization thresholds would be shifted
                                             * 14 bits to the right causing some of them to become 0 (which causes problems later) */
            /* clear sfbMaxScaleSpec */
            for(w = 0; w < nWindows[ch]; w++) {
                for (sfb = 0; sfb<psyData[ch]->sfbActive; sfb++) {
                    (pSfbMaxScaleSpec[ch]+w*maxSfb[ch])[sfb] = 0;
                    (pSfbEnergy[ch]+w*maxSfb[ch])[sfb]       = (FIXP_DBL)0;
                    (pSfbEnergyLdData[ch]+w*maxSfb[ch])[sfb] = FL2FXCONST_DBL(-1.0f);
                    (pSfbThreshold[ch]+w*maxSfb[ch])[sfb]    = (FIXP_DBL)0;
                }
            }
        }
    }

/* Advance psychoacoustics: Tonality and TNS */
    if (psyStatic[0]->isLFE) {
        tnsData[0]->dataRaw.Long.subBlockInfo.tnsActive = 0;
    }
    else
    {

for(ch = 0; ch < channels; ch++) {
            if (!isShortWindow[ch]) {
                /* tonality */
                FDKaacEnc_CalculateFullTonality( psyData[ch]->mdctSpectrum,
                                       pSfbMaxScaleSpec[ch],
                                       pSfbEnergyLdData[ch],
                                       sfbTonality[ch],
                                       psyData[ch]->sfbActive,
                                       hThisPsyConf[ch]->sfbOffset,
                                       hThisPsyConf[ch]->pnsConf.usePns);
            }
        }

if (hPsyConfLong->tnsConf.tnsActive || hPsyConfShort->tnsConf.tnsActive) {
            INT tnsActive[TRANS_FAC];
            INT nrgScaling[2] = {0,0};
            INT tnsSpecShift = 0;

for(ch = 0; ch < channels; ch++) {
                for(w = 0; w < nWindows[ch]; w++) {

wOffset = w*windowLength[ch];
                    /* TNS */
                    FDKaacEnc_TnsDetect(
                                tnsData[ch],
                                &hThisPsyConf[ch]->tnsConf,
                                &psyOutChannel[ch]->tnsInfo,
                                hThisPsyConf[ch]->sfbCnt,
                                psyData[ch]->mdctSpectrum+wOffset,
                                w,
                                psyStatic[ch]->blockSwitchingControl.lastWindowSequence
                                );
                }
            }

if (channels == 2) {
              FDKaacEnc_TnsSync(
                      tnsData[1],
                      tnsData[0],
                      &psyOutChannel[1]->tnsInfo,
                      &psyOutChannel[0]->tnsInfo,

psyStatic[1]->blockSwitchingControl.lastWindowSequence,
                      psyStatic[0]->blockSwitchingControl.lastWindowSequence,
                      &hThisPsyConf[1]->tnsConf);
            }

FDK_ASSERT(commonWindow=1); /* all checks for TNS do only work for common windows (which is always set)*/
            for(w = 0; w < nWindows[0]; w++)
            {
                if (isShortWindow[0])
                    tnsActive[w] = tnsData[0]->dataRaw.Short.subBlockInfo[w].tnsActive ||
                    ((channels == 2) ? tnsData[1]->dataRaw.Short.subBlockInfo[w].tnsActive : 0);
                else
                    tnsActive[w] = tnsData[0]->dataRaw.Long.subBlockInfo.tnsActive ||
                    ((channels == 2) ? tnsData[1]->dataRaw.Long.subBlockInfo.tnsActive : 0);
            }

for(ch = 0; ch < channels; ch++) {
                if (tnsActive[0] && !isShortWindow[ch]) {
                    /* Scale down spectrum if tns is active in one of the two channels with same lastWindowSequence */
                    /* first part of threshold calculation; it's not necessary to update sfbMaxScaleSpec */
                    INT shift = 1;
                    for(sfb=0; sfb<hThisPsyConf[ch]->lowpassLine; sfb++) {
                        psyData[ch]->mdctSpectrum[sfb] = psyData[ch]->mdctSpectrum[sfb] >> shift;
                    }

/* update thresholds */
                    for (sfb=0; sfb<psyData[ch]->sfbActive; sfb++) {
                        pSfbThreshold[ch][sfb] >>= (2*shift);
                    }

psyData[ch]->mdctScale += shift; /* update mdctScale */

/* calc sfbEnergies after tnsEncode again ! */

}
            }

for(ch = 0; ch < channels; ch++) {
              for(w = 0; w < nWindows[ch]; w++)
                {
                    wOffset = w*windowLength[ch];
                    FDKaacEnc_TnsEncode(
                                &psyOutChannel[ch]->tnsInfo,
                                tnsData[ch],
                                hThisPsyConf[ch]->sfbCnt,
                                &hThisPsyConf[ch]->tnsConf,
                                hThisPsyConf[ch]->sfbOffset[psyData[ch]->sfbActive],/*hThisPsyConf[ch]->lowpassLine*/ /* filter stops before that line ! */
                                psyData[ch]->mdctSpectrum+wOffset,
                                w,
                                psyStatic[ch]->blockSwitchingControl.lastWindowSequence);

if(tnsActive[w]) {
                            /* Calc sfb-bandwise mdct-energies for left and right channel again, */
                            /* if tns active in current channel or in one channel with same lastWindowSequence left and right */
                            FDKaacEnc_CalcSfbMaxScaleSpec(psyData[ch]->mdctSpectrum+wOffset,
                                                hThisPsyConf[ch]->sfbOffset,
                                                pSfbMaxScaleSpec[ch]+w*maxSfb[ch],
                                                psyData[ch]->sfbActive);
                    }
                }
            }

for(ch = 0; ch < channels; ch++) {
              for(w = 0; w < nWindows[ch]; w++) {

if (tnsActive[w]) {

if (isShortWindow[ch]) {
                    FDKaacEnc_CalcBandEnergyOptimShort(psyData[ch]->mdctSpectrum+w*windowLength[ch],
                                             pSfbMaxScaleSpec[ch]+w*maxSfb[ch],
                                             hThisPsyConf[ch]->sfbOffset,
                                             psyData[ch]->sfbActive,
                                             pSfbEnergy[ch]+w*maxSfb[ch]);
                  }
                  else {
                    nrgScaling[ch] =        /* with tns, energy calculation can overflow; -> scaling */
                    FDKaacEnc_CalcBandEnergyOptimLong(psyData[ch]->mdctSpectrum,
                                           pSfbMaxScaleSpec[ch],
                                           hThisPsyConf[ch]->sfbOffset,
                                           psyData[ch]->sfbActive,
                                           pSfbEnergy[ch],
                                           pSfbEnergyLdData[ch]);
                    tnsSpecShift = fixMax(tnsSpecShift, nrgScaling[ch]);       /* nrgScaling is set only if nrg would have an overflow */
                  }
                } /* if tnsActive */
              }
            } /* end channel loop */

/* adapt scaling to prevent nrg overflow, only for long blocks */
            for(ch = 0; ch < channels; ch++) {
              if ( (tnsSpecShift!=0) && !isShortWindow[ch] ) {
                /* scale down spectrum, nrg's and thresholds, if there was an overflow in sfbNrg calculation after tns */
                for(line=0; line<hThisPsyConf[ch]->lowpassLine; line++) {
                  psyData[ch]->mdctSpectrum[line] >>= tnsSpecShift;
                }
                INT scale = (tnsSpecShift-nrgScaling[ch])<<1;
                for(sfb=0; sfb<psyData[ch]->sfbActive; sfb++) {
                  pSfbEnergyLdData[ch][sfb]   -= scale*FL2FXCONST_DBL(1.0/LD_DATA_SCALING);
                  pSfbEnergy[ch][sfb]        >>= scale;
                  pSfbThreshold[ch][sfb]     >>= (tnsSpecShift<<1);
                }
                psyData[ch]->mdctScale += tnsSpecShift;  /* update mdctScale; not necessary to update sfbMaxScaleSpec */

}
            } /* end channel loop */

} /* TNS active */
    }  /* !isLFE */

/* Advance thresholds */
    for(ch = 0; ch < channels; ch++) {
        INT headroom;

FIXP_DBL clipEnergy;
        INT energyShift  = psyData[ch]->mdctScale*2 ;
        INT clipNrgShift = energyShift - THR_SHIFTBITS ;

if(isShortWindow[ch])
            headroom = 6;
        else
            headroom = 0;

if (clipNrgShift >= 0)
            clipEnergy = hThisPsyConf[ch]->clipEnergy >>  clipNrgShift ;
        else if (clipNrgShift>=-headroom)
            clipEnergy = hThisPsyConf[ch]->clipEnergy << -clipNrgShift ;
        else
            clipEnergy = (FIXP_DBL)MAXVAL_DBL ;

for(w = 0; w < nWindows[ch]; w++)
        {
            INT i;
            /* limit threshold to avoid clipping */
            for (i=0; i<psyData[ch]->sfbActive; i++) {
                *(pSfbThreshold[ch]+w*maxSfb[ch]+i) = fixMin(*(pSfbThreshold[ch]+w*maxSfb[ch]+i), clipEnergy);
            }

/* spreading */
            FDKaacEnc_SpreadingMax(psyData[ch]->sfbActive,
                            hThisPsyConf[ch]->sfbMaskLowFactor,
                            hThisPsyConf[ch]->sfbMaskHighFactor,
                            pSfbThreshold[ch]+w*maxSfb[ch]);

/* PCM quantization threshold */
            energyShift += PCM_QUANT_THR_SCALE;
            if (energyShift>=0) {
               energyShift = fixMin(DFRACT_BITS-1,energyShift);
               for (i=0; i<psyData[ch]->sfbActive;i++) {
                   *(pSfbThreshold[ch]+w*maxSfb[ch]+i) = fixMax(*(pSfbThreshold[ch]+w*maxSfb[ch]+i) >> THR_SHIFTBITS,
                                                          (hThisPsyConf[ch]->sfbPcmQuantThreshold[i] >> energyShift));
               }
            } else {
               energyShift = fixMin(DFRACT_BITS-1,-energyShift);
               for (i=0; i<psyData[ch]->sfbActive;i++) {
                   *(pSfbThreshold[ch]+w*maxSfb[ch]+i) = fixMax(*(pSfbThreshold[ch]+w*maxSfb[ch]+i) >> THR_SHIFTBITS,
                                                          (hThisPsyConf[ch]->sfbPcmQuantThreshold[i] << energyShift));
               }
            }

if (!psyStatic[ch]->isLFE)
            {
                /* preecho control */
                if(psyStatic[ch]->blockSwitchingControl.lastWindowSequence == STOP_WINDOW) {
                    /* prevent FDKaacEnc_PreEchoControl from comparing stop
                       thresholds with short thresholds */
                    for (i=0; i<psyData[ch]->sfbActive;i++) {
                        psyStatic[ch]->sfbThresholdnm1[i] = (FIXP_DBL)MAXVAL_DBL;
                    }

psyStatic[ch]->mdctScalenm1 = 0;
                    psyStatic[ch]->calcPreEcho  = 0;
                }

FDKaacEnc_PreEchoControl( psyStatic[ch]->sfbThresholdnm1,
                                psyStatic[ch]->calcPreEcho,
                                psyData[ch]->sfbActive,
                                hThisPsyConf[ch]->maxAllowedIncreaseFactor,
                                hThisPsyConf[ch]->minRemainingThresholdFactor,
                                pSfbThreshold[ch]+w*maxSfb[ch],
                                psyData[ch]->mdctScale,
                                &psyStatic[ch]->mdctScalenm1);

psyStatic[ch]->calcPreEcho = 1;

if(psyStatic[ch]->blockSwitchingControl.lastWindowSequence == START_WINDOW)
                {
                    /* prevent FDKaacEnc_PreEchoControl in next frame to compare start
                       thresholds with short thresholds */
                    for (i=0; i<psyData[ch]->sfbActive;i++) {
                        psyStatic[ch]->sfbThresholdnm1[i] = (FIXP_DBL)MAXVAL_DBL;
                    }

psyStatic[ch]->mdctScalenm1 = 0;
                    psyStatic[ch]->calcPreEcho  = 0;
                }

}

/* spread energy to avoid hole detection */
            FDKmemcpy(pSfbSpreadEnergy[ch]+w*maxSfb[ch], pSfbEnergy[ch]+w*maxSfb[ch], psyData[ch]->sfbActive*sizeof(FIXP_DBL));

FDKaacEnc_SpreadingMax(psyData[ch]->sfbActive,
                         hThisPsyConf[ch]->sfbMaskLowFactorSprEn,
                         hThisPsyConf[ch]->sfbMaskHighFactorSprEn,
                         pSfbSpreadEnergy[ch]+w*maxSfb[ch]);
        }
    }

/* Calc bandwise energies for mid and side channel. Do it only if 2 channels exist */
    if (channels==2) {
        for(w = 0; w < nWindows[1]; w++) {
            wOffset = w*windowLength[1];
            FDKaacEnc_CalcBandNrgMSOpt(psyData[0]->mdctSpectrum+wOffset,
                             psyData[1]->mdctSpectrum+wOffset,
                             pSfbMaxScaleSpec[0]+w*maxSfb[0],
                             pSfbMaxScaleSpec[1]+w*maxSfb[1],
                             hThisPsyConf[1]->sfbOffset,
                             psyData[0]->sfbActive,
                             pSfbEnergyMS[0]+w*maxSfb[0],
                             pSfbEnergyMS[1]+w*maxSfb[1],
                             (psyStatic[1]->blockSwitchingControl.lastWindowSequence != SHORT_WINDOW),
                             psyData[0]->sfbEnergyMSLdData,
                             psyData[1]->sfbEnergyMSLdData);
        }
    }

/* group short data (maxSfb[ch] for short blocks is determined here) */
    for(ch=0;ch<channels;ch++)
    {
        INT noSfb, i;
        if(isShortWindow[ch])
        {
            int sfbGrp;
            noSfb = psyStatic[ch]->blockSwitchingControl.noOfGroups * hPsyConfShort->sfbCnt;
            /* At this point, energies and thresholds are copied/regrouped from the ".Short" to the ".Long" arrays */
            FDKaacEnc_groupShortData( psyData[ch]->mdctSpectrum,
                            &psyData[ch]->sfbThreshold,
                            &psyData[ch]->sfbEnergy,
                            &psyData[ch]->sfbEnergyMS,
                            &psyData[ch]->sfbSpreadEnergy,
                            hPsyConfShort->sfbCnt,
                            psyData[ch]->sfbActive,
                            hPsyConfShort->sfbOffset,
                            hPsyConfShort->sfbMinSnrLdData,
                            psyData[ch]->groupedSfbOffset,
                            &maxSfbPerGroup[ch],
                            psyOutChannel[ch]->sfbMinSnrLdData,
                            psyStatic[ch]->blockSwitchingControl.noOfGroups,
                            psyStatic[ch]->blockSwitchingControl.groupLen,
                            psyConf[1].granuleLength);

/* calculate ldData arrays (short values are in .Long-arrays after FDKaacEnc_groupShortData) */
            for (sfbGrp = 0; sfbGrp < noSfb; sfbGrp += hPsyConfShort->sfbCnt) {
              LdDataVector(&psyData[ch]->sfbEnergy.Long[sfbGrp], &psyOutChannel[ch]->sfbEnergyLdData[sfbGrp], psyData[ch]->sfbActive);
            }

/* calc sfbThrld and set Values smaller 2^-31 to 2^-33*/
            for (sfbGrp = 0; sfbGrp < noSfb; sfbGrp += hPsyConfShort->sfbCnt) {
              LdDataVector(&psyData[ch]->sfbThreshold.Long[sfbGrp], &psyOutChannel[ch]->sfbThresholdLdData[sfbGrp], psyData[ch]->sfbActive);
              for (sfb=0;sfb<psyData[ch]->sfbActive;sfb++) {
                psyOutChannel[ch]->sfbThresholdLdData[sfbGrp+sfb] =
                           fixMax(psyOutChannel[ch]->sfbThresholdLdData[sfbGrp+sfb], FL2FXCONST_DBL(-0.515625f));
              }
            }

if ( channels==2 ) {
              for (sfbGrp = 0; sfbGrp < noSfb; sfbGrp += hPsyConfShort->sfbCnt) {
                LdDataVector(&psyData[ch]->sfbEnergyMS.Long[sfbGrp], &psyData[ch]->sfbEnergyMSLdData[sfbGrp], psyData[ch]->sfbActive);
              }
            }

FDKmemcpy(psyOutChannel[ch]->sfbOffsets, psyData[ch]->groupedSfbOffset, (MAX_GROUPED_SFB+1)*sizeof(INT));

} else {
            /* maxSfb[ch] for long blocks */
            for (sfb = psyData[ch]->sfbActive-1; sfb >= 0; sfb--) {
                for (line = hPsyConfLong->sfbOffset[sfb+1]-1; line >= hPsyConfLong->sfbOffset[sfb]; line--) {
                    if (psyData[ch]->mdctSpectrum[line] != FL2FXCONST_SGL(0.0f)) break;
                }
                if (line > hPsyConfLong->sfbOffset[sfb]) break;
            }
            maxSfbPerGroup[ch] = sfb + 1;
            /* ensure at least one section in ICS; workaround for existing decoder crc implementation */
            maxSfbPerGroup[ch] = fixMax(fixMin(5,psyData[ch]->sfbActive),maxSfbPerGroup[ch]);

/* sfbNrgLdData is calculated in FDKaacEnc_advancePsychLong, copy in psyOut structure */
            FDKmemcpy(psyOutChannel[ch]->sfbEnergyLdData, psyData[ch]->sfbEnergyLdData.Long, psyData[ch]->sfbActive*sizeof(FIXP_DBL));

FDKmemcpy(psyOutChannel[ch]->sfbOffsets, hPsyConfLong->sfbOffset, (MAX_GROUPED_SFB+1)*sizeof(INT));

/* sfbMinSnrLdData modified in adjust threshold, copy necessary */
            FDKmemcpy(psyOutChannel[ch]->sfbMinSnrLdData, hPsyConfLong->sfbMinSnrLdData, psyData[ch]->sfbActive*sizeof(FIXP_DBL));

/* sfbEnergyMSLdData ist already calculated in FDKaacEnc_CalcBandNrgMSOpt; only in long case */

/* calc sfbThrld and set Values smaller 2^-31 to 2^-33*/
            LdDataVector(psyData[ch]->sfbThreshold.Long, psyOutChannel[ch]->sfbThresholdLdData, psyData[ch]->sfbActive);
            for (i=0;i<psyData[ch]->sfbActive;i++) {
              psyOutChannel[ch]->sfbThresholdLdData[i] =
                           fixMax(psyOutChannel[ch]->sfbThresholdLdData[i], FL2FXCONST_DBL(-0.515625f));
            }

}

/*
        Intensity parameter intialization.
     */
    for(ch=0;ch<channels;ch++) {
        FDKmemclear(psyOutChannel[ch]->isBook,  MAX_GROUPED_SFB*sizeof(INT));
        FDKmemclear(psyOutChannel[ch]->isScale, MAX_GROUPED_SFB*sizeof(INT));
    }

for(ch=0;ch<channels;ch++) {
        INT win = (isShortWindow[ch]?1:0);
        if (!psyStatic[ch]->isLFE)
        {
            /* PNS Decision */
            FDKaacEnc_PnsDetect( &(psyConf[0].pnsConf),
                       pnsData[ch],
                       psyStatic[ch]->blockSwitchingControl.lastWindowSequence,
                       psyData[ch]->sfbActive,
                       maxSfbPerGroup[ch], /* count of Sfb which are not zero. */
                       psyOutChannel[ch]->sfbThresholdLdData,
                       psyConf[win].sfbOffset,
                       psyData[ch]->mdctSpectrum,
                       psyData[ch]->sfbMaxScaleSpec.Long,
                       sfbTonality[ch],
                       psyOutChannel[ch]->tnsInfo.order[0][0],
                       tnsData[ch]->dataRaw.Long.subBlockInfo.predictionGain,
                       tnsData[ch]->dataRaw.Long.subBlockInfo.tnsActive,
                       psyOutChannel[ch]->sfbEnergyLdData,
                       psyOutChannel[ch]->noiseNrg );
        } /* !isLFE */
    }

/*
        stereo Processing
    */
    if(channels == 2)
    {
        psyOutElement->toolsInfo.msDigest = MS_NONE;
        psyOutElement->commonWindow       = commonWindow;
        if (psyOutElement->commonWindow)
            maxSfbPerGroup[0] = maxSfbPerGroup[1] =
                              fixMax(maxSfbPerGroup[0], maxSfbPerGroup[1]);

if(psyStatic[0]->blockSwitchingControl.lastWindowSequence != SHORT_WINDOW)
        {
            /* PNS preprocessing depending on ms processing: PNS not in Short Window! */
            FDKaacEnc_PreProcessPnsChannelPair(
                                psyData[0]->sfbActive,
                                (&psyData[0]->sfbEnergy)->Long,
                                (&psyData[1]->sfbEnergy)->Long,
                                psyOutChannel[0]->sfbEnergyLdData,
                                psyOutChannel[1]->sfbEnergyLdData,
                                psyData[0]->sfbEnergyMS.Long,
                                &(psyConf[0].pnsConf),
                                pnsData[0],
                                pnsData[1]);

FDKaacEnc_IntensityStereoProcessing(
                                psyData[0]->sfbEnergy.Long,
                                psyData[1]->sfbEnergy.Long,
                                psyData[0]->mdctSpectrum,
                                psyData[1]->mdctSpectrum,
                                psyData[0]->sfbThreshold.Long,
                                psyData[1]->sfbThreshold.Long,
                                psyOutChannel[1]->sfbThresholdLdData,
                                psyData[0]->sfbSpreadEnergy.Long,
                                psyData[1]->sfbSpreadEnergy.Long,
                                psyOutChannel[0]->sfbEnergyLdData,
                                psyOutChannel[1]->sfbEnergyLdData,
                                &psyOutElement->toolsInfo.msDigest,
                                psyOutElement->toolsInfo.msMask,
                                psyConf[0].sfbCnt,
                                psyConf[0].sfbCnt,
                                maxSfbPerGroup[0],
                                psyConf[0].sfbOffset,
                                psyConf[0].allowIS && commonWindow,
                                psyOutChannel[1]->isBook,
                                psyOutChannel[1]->isScale,
                                pnsData);

FDKaacEnc_MsStereoProcessing(
                                psyData,
                                psyOutChannel,
                                psyOutChannel[1]->isBook,
                                &psyOutElement->toolsInfo.msDigest,
                                psyOutElement->toolsInfo.msMask,
                                psyData[0]->sfbActive,
                                psyData[0]->sfbActive,
                                maxSfbPerGroup[0],
                                psyOutChannel[0]->sfbOffsets);

/* PNS postprocessing */
            FDKaacEnc_PostProcessPnsChannelPair(psyData[0]->sfbActive,
                                &(psyConf[0].pnsConf),
                                pnsData[0],
                                pnsData[1],
                                psyOutElement->toolsInfo.msMask,
                                &psyOutElement->toolsInfo.msDigest);

} else {
            FDKaacEnc_IntensityStereoProcessing(
                                psyData[0]->sfbEnergy.Long,
                                psyData[1]->sfbEnergy.Long,
                                psyData[0]->mdctSpectrum,
                                psyData[1]->mdctSpectrum,
                                psyData[0]->sfbThreshold.Long,
                                psyData[1]->sfbThreshold.Long,
                                psyOutChannel[1]->sfbThresholdLdData,
                                psyData[0]->sfbSpreadEnergy.Long,
                                psyData[1]->sfbSpreadEnergy.Long,
                                psyOutChannel[0]->sfbEnergyLdData,
                                psyOutChannel[1]->sfbEnergyLdData,
                                &psyOutElement->toolsInfo.msDigest,
                                psyOutElement->toolsInfo.msMask,
                                psyStatic[0]->blockSwitchingControl.noOfGroups*hPsyConfShort->sfbCnt,
                                psyConf[1].sfbCnt,
                                maxSfbPerGroup[0],
                                psyData[0]->groupedSfbOffset,
                                psyConf[0].allowIS && commonWindow,
                                psyOutChannel[1]->isBook,
                                psyOutChannel[1]->isScale,
                                pnsData);

/* it's OK to pass the ".Long" arrays here. They contain grouped short data since FDKaacEnc_groupShortData() */
            FDKaacEnc_MsStereoProcessing( psyData,
                                psyOutChannel,
                                psyOutChannel[1]->isBook,
                                &psyOutElement->toolsInfo.msDigest,
                                psyOutElement->toolsInfo.msMask,
                                psyStatic[0]->blockSwitchingControl.noOfGroups*hPsyConfShort->sfbCnt,
                                hPsyConfShort->sfbCnt,
                                maxSfbPerGroup[0],
                                psyOutChannel[0]->sfbOffsets);
        }
    }

/*
    PNS Coding
  */
  for(ch=0;ch<channels;ch++) {
      if (psyStatic[ch]->isLFE) {
          /* no PNS coding */
          for(sfb = 0; sfb < psyData[ch]->sfbActive; sfb++) {
            psyOutChannel[ch]->noiseNrg[sfb] = NO_NOISE_PNS;
          }
      } else
      {
          FDKaacEnc_CodePnsChannel(psyData[ch]->sfbActive,
                         &(psyConf[ch].pnsConf),
                         pnsData[ch]->pnsFlag,
                         psyData[ch]->sfbEnergyLdData.Long,
                         psyOutChannel[ch]->noiseNrg, /* this is the energy that will be written to the bitstream */
                         psyOutChannel[ch]->sfbThresholdLdData);
      }
  }

/*
        build output
    */
    for(ch=0;ch<channels;ch++)
    {
        INT j, grp, mask;

psyOutChannel[ch]->maxSfbPerGroup    = maxSfbPerGroup[ch];
        psyOutChannel[ch]->mdctScale         = psyData[ch]->mdctScale;

if(isShortWindow[ch]==0) {

psyOutChannel[ch]->sfbCnt         = hPsyConfLong->sfbActive;
            psyOutChannel[ch]->sfbPerGroup    = hPsyConfLong->sfbActive;
            psyOutChannel[ch]->lastWindowSequence = psyStatic[ch]->blockSwitchingControl.lastWindowSequence;
            psyOutChannel[ch]->windowShape    = psyStatic[ch]->blockSwitchingControl.windowShape;
        }
        else {
            INT sfbCnt = psyStatic[ch]->blockSwitchingControl.noOfGroups*hPsyConfShort->sfbCnt;

psyOutChannel[ch]->sfbCnt         = sfbCnt;
            psyOutChannel[ch]->sfbPerGroup    = hPsyConfShort->sfbCnt;
            psyOutChannel[ch]->lastWindowSequence = SHORT_WINDOW;
            psyOutChannel[ch]->windowShape    = SINE_WINDOW;
        }

/* generate grouping mask */
        mask = 0;
        for (grp = 0; grp < psyStatic[ch]->blockSwitchingControl.noOfGroups; grp++)
        {
          mask <<= 1;
          for (j=1; j<psyStatic[ch]->blockSwitchingControl.groupLen[grp]; j++) {
              mask = (mask<<1) | 1 ;
          }
        }
        psyOutChannel[ch]->groupingMask = mask;

/* build interface */
        FDKmemcpy(psyOutChannel[ch]->groupLen,psyStatic[ch]->blockSwitchingControl.groupLen,MAX_NO_OF_GROUPS*sizeof(INT));
        FDKmemcpy(psyOutChannel[ch]->sfbEnergy,(&psyData[ch]->sfbEnergy)->Long, MAX_GROUPED_SFB*sizeof(FIXP_DBL));
        FDKmemcpy(psyOutChannel[ch]->sfbSpreadEnergy,(&psyData[ch]->sfbSpreadEnergy)->Long, MAX_GROUPED_SFB*sizeof(FIXP_DBL));
//        FDKmemcpy(psyOutChannel[ch]->mdctSpectrum, psyData[ch]->mdctSpectrum, (1024)*sizeof(FIXP_DBL));
    }

return AAC_ENC_OK;
}

void FDKaacEnc_PsyClose(PSY_INTERNAL   **phPsyInternal,
                        PSY_OUT        **phPsyOut)
{
    int n, i;

if(phPsyInternal!=NULL) {
      PSY_INTERNAL *hPsyInternal = *phPsyInternal;

if (hPsyInternal)
      {
        for (i=0; i<(6); i++) {
          if (hPsyInternal->pStaticChannels[i]) {
            if (hPsyInternal->pStaticChannels[i]->psyInputBuffer)
              FreeRam_aacEnc_PsyInputBuffer(&hPsyInternal->pStaticChannels[i]->psyInputBuffer);  /* AUDIO INPUT BUFFER */

FreeRam_aacEnc_PsyStatic(&hPsyInternal->pStaticChannels[i]);                         /* PSY_STATIC */
          }
        }

for (i=0; i<(6); i++) {
          if (hPsyInternal->psyElement[i])
            FreeRam_aacEnc_PsyElement(&hPsyInternal->psyElement[i]);                             /* PSY_ELEMENT */
        }

FreeRam_aacEnc_PsyInternal(phPsyInternal);
      }
    }

if (phPsyOut!=NULL) {
      for (n=0; n<(1); n++) {
        if (phPsyOut[n])
        {
          for (i=0; i<(6); i++) {
            if (phPsyOut[n]->pPsyOutChannels[i])
              FreeRam_aacEnc_PsyOutChannel(&phPsyOut[n]->pPsyOutChannels[i]);                  /* PSY_OUT_CHANNEL */
          }

for (i=0; i<(6); i++) {
            if (phPsyOut[n]->psyOutElement[i])
              FreeRam_aacEnc_PsyOutElements(&phPsyOut[n]->psyOutElement[i]);                   /* PSY_OUT_ELEMENTS */
          }

FreeRam_aacEnc_PsyOut(&phPsyOut[n]);
        }
      }
    }
}

C++程序 | 1386行 | 57.25 KB

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