path: root/libAACenc/src/dyn_bits.cpp

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

                     (C) Copyright Fraunhofer IIS (1999)
                               All Rights Reserved

    Please be advised that this software and/or program delivery is
    Confidential Information of Fraunhofer and subject to and covered by the

    Fraunhofer IIS Software Evaluation Agreement
    between Google Inc. and  Fraunhofer
    effective and in full force since March 1, 2012.

    You may use this software and/or program only under the terms and
    conditions described in the above mentioned Fraunhofer IIS Software
    Evaluation Agreement. Any other and/or further use requires a separate agreement.


   This software and/or program is protected by copyright law and international
   treaties. Any reproduction or distribution of this software and/or program,
   or any portion of it, may result in severe civil and criminal penalties, and
   will be prosecuted to the maximum extent possible under law.

   $Id$
   Initial author:       M.Werner
   contents/description: Noiseless coder module

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

#include "dyn_bits.h"
#include "bit_cnt.h"
#include "psy_const.h"
#include "aacenc_pns.h"
#include "aacEnc_ram.h"
#include "aacEnc_rom.h"

typedef INT (*lookUpTable)[CODE_BOOK_ESC_NDX + 1];

static INT FDKaacEnc_getSideInfoBits(
        const SECTION_INFO* const huffsection,
        const SHORT* const        sideInfoTab,
        const INT                 useHCR
        )
{
  INT sideInfoBits;

  if ( useHCR && ((huffsection->codeBook == 11) || (huffsection->codeBook >= 16)) ) {
    sideInfoBits = 5;
  }
  else {
    sideInfoBits = sideInfoTab[huffsection->sfbCnt];
  }

  return (sideInfoBits);
}

/* count bits using all possible tables */
static void FDKaacEnc_buildBitLookUp(
        const SHORT* const        quantSpectrum,
        const INT                 maxSfb,
        const INT* const          sfbOffset,
        const UINT* const         sfbMax,
        INT                       bitLookUp[MAX_SFB_LONG][CODE_BOOK_ESC_NDX + 1],
        SECTION_INFO* const       huffsection
        )
{
  INT i, sfbWidth;

  for (i = 0; i < maxSfb; i++)
  {
    huffsection[i].sfbCnt = 1;
    huffsection[i].sfbStart = i;
    huffsection[i].sectionBits = INVALID_BITCOUNT;
    huffsection[i].codeBook = -1;
    sfbWidth = sfbOffset[i + 1] - sfbOffset[i];
    FDKaacEnc_bitCount(quantSpectrum + sfbOffset[i], sfbWidth, sfbMax[i], bitLookUp[i]);
  }
}

/* essential helper functions */
static INT FDKaacEnc_findBestBook(
        const INT* const          bc,
        INT* const                book,
        const INT                 useVCB11
        )
{
  INT minBits = INVALID_BITCOUNT, j;

  int end = CODE_BOOK_ESC_NDX;


  for (j = 0; j <= end; j++)
  {
    if (bc[j] < minBits)
    {
      minBits = bc[j];
      *book = j;
    }
  }
  return (minBits);
}

static INT FDKaacEnc_findMinMergeBits(
        const INT* const          bc1,
        const INT* const          bc2,
        const INT                 useVCB11
        )
{
  INT minBits = INVALID_BITCOUNT, j;

  int end = CODE_BOOK_ESC_NDX;


  for (j = 0; j <= end; j++)
  {
    if (bc1[j] + bc2[j] < minBits)
    {
      minBits = bc1[j] + bc2[j];
    }
  }
  return (minBits);
}

static void FDKaacEnc_mergeBitLookUp(
        INT* const                bc1,
        const INT* const          bc2
        )
{
  int j;

  for (j = 0; j <= CODE_BOOK_ESC_NDX; j++)
  {
    bc1[j] = fixMin(bc1[j] + bc2[j], INVALID_BITCOUNT);
  }
}

static INT FDKaacEnc_findMaxMerge(
        const INT* const          mergeGainLookUp,
        const SECTION_INFO* const  huffsection,
        const INT maxSfb,
        INT* const                maxNdx
        )
{
  INT i, maxMergeGain = 0;

  for (i = 0; i + huffsection[i].sfbCnt < maxSfb; i += huffsection[i].sfbCnt)
  {
    if (mergeGainLookUp[i] > maxMergeGain)
    {
      maxMergeGain = mergeGainLookUp[i];
      *maxNdx = i;
    }
  }
  return (maxMergeGain);
}

static INT FDKaacEnc_CalcMergeGain(
        const SECTION_INFO* const huffsection,
        const INT                 bitLookUp[MAX_SFB_LONG][CODE_BOOK_ESC_NDX + 1],
        const SHORT* const        sideInfoTab,
        const INT                 ndx1,
        const INT                 ndx2,
        const INT                 useVCB11
        )
{
  INT MergeGain, MergeBits, SplitBits;

  MergeBits = sideInfoTab[huffsection[ndx1].sfbCnt + huffsection[ndx2].sfbCnt] + FDKaacEnc_findMinMergeBits(bitLookUp[ndx1], bitLookUp[ndx2], useVCB11);
  SplitBits = huffsection[ndx1].sectionBits + huffsection[ndx2].sectionBits; /* Bit amount for splitted huffsections */
  MergeGain = SplitBits - MergeBits;

  if ( (huffsection[ndx1].codeBook==CODE_BOOK_PNS_NO)||(huffsection[ndx2].codeBook==CODE_BOOK_PNS_NO)
    || (huffsection[ndx1].codeBook==CODE_BOOK_IS_OUT_OF_PHASE_NO)||(huffsection[ndx2].codeBook==CODE_BOOK_IS_OUT_OF_PHASE_NO)
    || (huffsection[ndx1].codeBook==CODE_BOOK_IS_IN_PHASE_NO)||(huffsection[ndx2].codeBook==CODE_BOOK_IS_IN_PHASE_NO)
    )
  {
    MergeGain = -1;
  }

  return (MergeGain);
}


/* sectioning Stage 0:find minimum codbooks */
static void FDKaacEnc_gmStage0(
        SECTION_INFO* const RESTRICT huffsection,
        const INT                    bitLookUp[MAX_SFB_LONG][CODE_BOOK_ESC_NDX + 1],
        const INT                    maxSfb,
        const INT* const             noiseNrg,
        const INT* const             isBook
        )
{
  INT i;

  for (i = 0; i < maxSfb; i++)
  {
    /* Side-Info bits will be calculated in Stage 1! */
    if (huffsection[i].sectionBits == INVALID_BITCOUNT)
    {
      /* intensity and pns codebooks are already allocated in bitcount.c */
      if(noiseNrg[i] != NO_NOISE_PNS){
        huffsection[i].codeBook=CODE_BOOK_PNS_NO;
        huffsection[i].sectionBits = 0;
      }
      else if( isBook[i] ) {
        huffsection[i].codeBook=isBook[i];
        huffsection[i].sectionBits = 0;
      }
      else {
        huffsection[i].sectionBits = FDKaacEnc_findBestBook(bitLookUp[i], &(huffsection[i].codeBook), 0); /* useVCB11 must be 0!!! */
      }
    }
  }
}

/*
   sectioning Stage 1:merge all connected regions with the same code book and
   calculate side info
 */
static void FDKaacEnc_gmStage1(
        SECTION_INFO* const RESTRICT huffsection,
        INT                          bitLookUp[MAX_SFB_LONG][CODE_BOOK_ESC_NDX + 1],
        const INT                    maxSfb,
        const SHORT* const           sideInfoTab,
        const INT                    useVCB11
        )
{
  INT mergeStart = 0, mergeEnd;

  do
  {
    for (mergeEnd = mergeStart + 1; mergeEnd < maxSfb; mergeEnd++)
    {
      if (huffsection[mergeStart].codeBook != huffsection[mergeEnd].codeBook)
        break;


      /* we can merge. update tables, side info bits will be updated outside of this loop */
      huffsection[mergeStart].sfbCnt++;
      huffsection[mergeStart].sectionBits += huffsection[mergeEnd].sectionBits;

      /* update bit look up for all code books */
      FDKaacEnc_mergeBitLookUp(bitLookUp[mergeStart], bitLookUp[mergeEnd]);
    }

    /* add side info info bits */
    huffsection[mergeStart].sectionBits += FDKaacEnc_getSideInfoBits(&huffsection[mergeStart], sideInfoTab, useVCB11);
    huffsection[mergeEnd - 1].sfbStart = huffsection[mergeStart].sfbStart;      /* speed up prev search */

    mergeStart = mergeEnd;

  } while (mergeStart < maxSfb);
}

/*
   sectioning Stage 2:greedy merge algorithm, merge connected sections with
   maximum bit gain until no more gain is possible
 */
static void
FDKaacEnc_gmStage2(
        SECTION_INFO* const RESTRICT huffsection,
        INT* const RESTRICT          mergeGainLookUp,
        INT                          bitLookUp[MAX_SFB_LONG][CODE_BOOK_ESC_NDX + 1],
        const INT                    maxSfb,
        const SHORT* const           sideInfoTab,
        const INT                    useVCB11
        )
{
  INT i;

  for (i = 0; i + huffsection[i].sfbCnt < maxSfb; i += huffsection[i].sfbCnt)
  {
    mergeGainLookUp[i] = FDKaacEnc_CalcMergeGain(huffsection,
                                       bitLookUp,
                                       sideInfoTab,
                                       i,
                                       i + huffsection[i].sfbCnt,
                                       useVCB11);
  }

  while (TRUE)
  {
    INT maxMergeGain, maxNdx = 0, maxNdxNext, maxNdxLast;

    maxMergeGain = FDKaacEnc_findMaxMerge(mergeGainLookUp, huffsection, maxSfb, &maxNdx);

    /* exit while loop if no more gain is possible */
    if (maxMergeGain <= 0)
      break;

    maxNdxNext = maxNdx + huffsection[maxNdx].sfbCnt;

    /* merge sections with maximum bit gain */
    huffsection[maxNdx].sfbCnt += huffsection[maxNdxNext].sfbCnt;
    huffsection[maxNdx].sectionBits += huffsection[maxNdxNext].sectionBits - maxMergeGain;

    /* update bit look up table for merged huffsection  */
    FDKaacEnc_mergeBitLookUp(bitLookUp[maxNdx], bitLookUp[maxNdxNext]);

    /* update mergeLookUpTable */
    if (maxNdx != 0)
    {
      maxNdxLast = huffsection[maxNdx - 1].sfbStart;
      mergeGainLookUp[maxNdxLast] = FDKaacEnc_CalcMergeGain(huffsection,
                                                  bitLookUp,
                                                  sideInfoTab,
                                                  maxNdxLast,
                                                  maxNdx,
                                                  useVCB11);

    }
    maxNdxNext = maxNdx + huffsection[maxNdx].sfbCnt;

    huffsection[maxNdxNext - 1].sfbStart = huffsection[maxNdx].sfbStart;

    if (maxNdxNext < maxSfb)
      mergeGainLookUp[maxNdx] = FDKaacEnc_CalcMergeGain(huffsection,
                                              bitLookUp,
                                              sideInfoTab,
                                              maxNdx,
                                              maxNdxNext,
                                              useVCB11);

  }
}

/* count bits used by the noiseless coder */
static void FDKaacEnc_noiselessCounter(
        SECTION_DATA* const RESTRICT sectionData,
        INT                          mergeGainLookUp[MAX_SFB_LONG],
        INT                          bitLookUp[MAX_SFB_LONG][CODE_BOOK_ESC_NDX + 1],
        const SHORT* const           quantSpectrum,
        const UINT* const            maxValueInSfb,
        const INT* const             sfbOffset,
        const INT                    blockType,
        const INT* const             noiseNrg,
        const INT* const             isBook,
        const INT                    useVCB11
        )
{
  INT grpNdx, i;
  const SHORT *sideInfoTab = NULL;
  SECTION_INFO *huffsection;

  /* use appropriate side info table */
  switch (blockType)
  {
  case LONG_WINDOW:
  case START_WINDOW:
  case STOP_WINDOW:
    sideInfoTab = FDKaacEnc_sideInfoTabLong;
    break;
  case SHORT_WINDOW:
    sideInfoTab = FDKaacEnc_sideInfoTabShort;
    break;
  }

  sectionData->noOfSections = 0;
  sectionData->huffmanBits = 0;
  sectionData->sideInfoBits = 0;


  if (sectionData->maxSfbPerGroup == 0)
    return;

  /* loop trough groups */
  for (grpNdx = 0; grpNdx < sectionData->sfbCnt; grpNdx += sectionData->sfbPerGroup)
  {
    huffsection = sectionData->huffsection + sectionData->noOfSections;

    /* count bits in this group */
    FDKaacEnc_buildBitLookUp(quantSpectrum,
                   sectionData->maxSfbPerGroup,
                   sfbOffset + grpNdx,
                   maxValueInSfb + grpNdx,
                   bitLookUp,
                   huffsection);

    /* 0.Stage :Find minimum Codebooks */
    FDKaacEnc_gmStage0(huffsection, bitLookUp, sectionData->maxSfbPerGroup, noiseNrg+grpNdx, isBook+grpNdx);

    /* 1.Stage :Merge all connected regions with the same code book */
    FDKaacEnc_gmStage1(huffsection, bitLookUp, sectionData->maxSfbPerGroup, sideInfoTab, useVCB11);


    /*
       2.Stage
       greedy merge algorithm, merge connected huffsections with maximum bit
       gain until no more gain is possible
     */

    FDKaacEnc_gmStage2(huffsection,
             mergeGainLookUp,
             bitLookUp,
             sectionData->maxSfbPerGroup,
             sideInfoTab,
             useVCB11);



    /*
       compress output, calculate total huff and side bits
       since we did not update the actual codebook in stage 2
       to save time, we must set it here for later use in bitenc
     */

    for (i = 0; i < sectionData->maxSfbPerGroup; i += huffsection[i].sfbCnt)
    {
      if ((huffsection[i].codeBook==CODE_BOOK_PNS_NO) ||
          (huffsection[i].codeBook==CODE_BOOK_IS_OUT_OF_PHASE_NO) ||
          (huffsection[i].codeBook==CODE_BOOK_IS_IN_PHASE_NO))
      {
        huffsection[i].sectionBits=0;
      } else {
        /* the sections in the sectionData are now marked with the optimal code book */

          FDKaacEnc_findBestBook(bitLookUp[i], &(huffsection[i].codeBook), useVCB11);

        sectionData->huffmanBits += huffsection[i].sectionBits - FDKaacEnc_getSideInfoBits(&huffsection[i], sideInfoTab, useVCB11);
      }

      huffsection[i].sfbStart += grpNdx;

      /* sum up side info bits (section data bits) */
      sectionData->sideInfoBits += FDKaacEnc_getSideInfoBits(&huffsection[i], sideInfoTab, useVCB11);
      sectionData->huffsection[sectionData->noOfSections++] = huffsection[i];
    }
  }
}


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

     functionname: FDKaacEnc_scfCount
     returns     : ---
     description : count bits used by scalefactors.

                   not in all cases if maxValueInSfb[] == 0 we set deltaScf
                   to zero. only if the difference of the last and future
                   scalefacGain is not greater then CODE_BOOK_SCF_LAV (60).

     example:
                  ^
     scalefacGain |
                  |
                  |       last 75
                  |          |
                  |          |
                  |          |
                  |          |      current 50
                  |          |          |
                  |          |          |
                  |          |          |
                  |          |          |
                  |          |          |      future 5
                  |          |          |          |
                  --- ... ---------------------------- ... --------->
                                                                sfb


                  if maxValueInSfb[] of current is zero because of a
                  notfallstrategie, we do not save bits and transmit a
                  deltaScf of 25. otherwise the deltaScf between the last
                  scalfacGain (75) and the future scalefacGain (5) is 70.

********************************************************************************/
static void FDKaacEnc_scfCount(
        const INT* const             scalefacGain,
        const UINT* const            maxValueInSfb,
        SECTION_DATA* const RESTRICT sectionData,
        const INT* const             isScale
        )
{
  INT i, j, k, m, n;

  INT lastValScf     = 0;
  INT deltaScf       = 0;
  INT found          = 0;
  INT scfSkipCounter = 0;
  INT lastValIs      = 0;

  sectionData->scalefacBits = 0;

  if (scalefacGain == NULL)
    return;

  sectionData->firstScf = 0;

  for (i=0; i<sectionData->noOfSections; i++)
  {
    if (sectionData->huffsection[i].codeBook != CODE_BOOK_ZERO_NO)
    {
      sectionData->firstScf = sectionData->huffsection[i].sfbStart;
      lastValScf = scalefacGain[sectionData->firstScf];
      break;
    }
  }

  for (i=0; i<sectionData->noOfSections; i++)
  {
    if ((sectionData->huffsection[i].codeBook == CODE_BOOK_IS_OUT_OF_PHASE_NO) ||
        (sectionData->huffsection[i].codeBook == CODE_BOOK_IS_IN_PHASE_NO))
    {
      for (j = sectionData->huffsection[i].sfbStart;
           j < sectionData->huffsection[i].sfbStart + sectionData->huffsection[i].sfbCnt;
           j++)
      {
        INT deltaIs = isScale[j]-lastValIs;
        lastValIs   = isScale[j];
        sectionData->scalefacBits+=FDKaacEnc_bitCountScalefactorDelta(deltaIs);
      }
    } /* Intensity */
    else if ((sectionData->huffsection[i].codeBook != CODE_BOOK_ZERO_NO) &&
             (sectionData->huffsection[i].codeBook != CODE_BOOK_PNS_NO))
    {
      INT tmp = sectionData->huffsection[i].sfbStart + sectionData->huffsection[i].sfbCnt;
      for (j = sectionData->huffsection[i].sfbStart; j<tmp; j++)
      {
        /* check if we can repeat the last value to save bits */
        if (maxValueInSfb[j] == 0)
        {
          found = 0;
          /* are scalefactors skipped? */
          if (scfSkipCounter == 0)
          {
            /* end of section */
            if (j == (tmp - 1) )
              found = 0;  /* search in other sections for maxValueInSfb != 0 */
            else
            {
              /* search in this section for the next maxValueInSfb[] != 0 */
              for (k = (j+1); k < tmp; k++)
              {
                if (maxValueInSfb[k] != 0)
                {
                  found = 1;
                  if ( (fixp_abs(scalefacGain[k] - lastValScf)) <= CODE_BOOK_SCF_LAV)
                     deltaScf = 0; /* save bits */
                  else
                  {
                    /* do not save bits */
                    deltaScf = lastValScf - scalefacGain[j];
                    lastValScf = scalefacGain[j];
                    scfSkipCounter = 0;
                  }
                  break;
                }
                /* count scalefactor skip */
                scfSkipCounter++;
              }
            }

            /* search for the next maxValueInSfb[] != 0 in all other sections */
            for (m=(i+1); (m < sectionData->noOfSections) && (found == 0); m++)
            {
              if ((sectionData->huffsection[m].codeBook != CODE_BOOK_ZERO_NO) && (sectionData->huffsection[m].codeBook != CODE_BOOK_PNS_NO))
              {
                INT end = sectionData->huffsection[m].sfbStart + sectionData->huffsection[m].sfbCnt;
                for (n = sectionData->huffsection[m].sfbStart; n<end; n++)
                {
                  if (maxValueInSfb[n] != 0)
                  {
                    found = 1;
                    if (fixp_abs(scalefacGain[n] - lastValScf) <= CODE_BOOK_SCF_LAV)
                      deltaScf = 0;  /* save bits */
                    else
                    {
                      /* do not save bits */
                      deltaScf = lastValScf - scalefacGain[j];
                      lastValScf = scalefacGain[j];
                      scfSkipCounter = 0;
                    }
                    break;
                  }
                  /* count scalefactor skip */
                  scfSkipCounter++;
                }
              }
            }
            /* no maxValueInSfb[] != 0 found */
            if (found == 0)
            {
              deltaScf = 0;
              scfSkipCounter = 0;
            }
          }
          else {
            /* consider skipped scalefactors */
            deltaScf = 0;
            scfSkipCounter--;
          }
        }
        else {
          deltaScf = lastValScf - scalefacGain[j];
          lastValScf = scalefacGain[j];
        }
        sectionData->scalefacBits += FDKaacEnc_bitCountScalefactorDelta(deltaScf);
      }
    }
  } /* for (i=0; i<sectionData->noOfSections; i++) */
}

#ifdef PNS_PRECOUNT_ENABLE
/*
  preCount bits used pns
*/
/* estimate bits used by pns for correction of static bits */
/* no codebook switch estimation, see AAC LD FASTENC */
INT noisePreCount(const INT *noiseNrg, INT maxSfb)
{
  INT   noisePCMFlag = TRUE;
  INT   lastValPns = 0, deltaPns;
  int   i, bits=0;

 for (i = 0; i < maxSfb; i++) {
   if (noiseNrg[i] != NO_NOISE_PNS) {

     if (noisePCMFlag) {
       bits+=PNS_PCM_BITS;
       lastValPns   = noiseNrg[i];
       noisePCMFlag = FALSE;
     }else {
       deltaPns     = noiseNrg[i]-lastValPns;
       lastValPns   = noiseNrg[i];
       bits+=FDKaacEnc_bitCountScalefactorDelta(deltaPns);
     }
   }
 }
 return ( bits );
}
#endif /* PNS_PRECOUNT_ENABLE */

/* count bits used by pns */
static void FDKaacEnc_noiseCount(
        SECTION_DATA* const RESTRICT sectionData,
        const INT* const             noiseNrg
        )
{
  INT noisePCMFlag = TRUE;
  INT lastValPns = 0, deltaPns;
  int i, j;

  sectionData->noiseNrgBits = 0;

  for (i = 0; i < sectionData->noOfSections; i++) {
    if (sectionData->huffsection[i].codeBook == CODE_BOOK_PNS_NO) {
      int sfbStart = sectionData->huffsection[i].sfbStart;
      int sfbEnd = sfbStart + sectionData->huffsection[i].sfbCnt;
      for (j=sfbStart; j<sfbEnd; j++) {

        if (noisePCMFlag) {
          sectionData->noiseNrgBits+=PNS_PCM_BITS;
          lastValPns   = noiseNrg[j];
          noisePCMFlag = FALSE;
        } else {
          deltaPns     = noiseNrg[j]-lastValPns;
          lastValPns   = noiseNrg[j];
          sectionData->noiseNrgBits+=FDKaacEnc_bitCountScalefactorDelta(deltaPns);
        }
      }
    }
  }
}

INT FDKaacEnc_dynBitCount(
        BITCNTR_STATE* const         hBC,
        const SHORT* const           quantSpectrum,
        const UINT* const            maxValueInSfb,
        const INT* const             scalefac,
        const INT                    blockType,
        const INT                    sfbCnt,
        const INT                    maxSfbPerGroup,
        const INT                    sfbPerGroup,
        const INT* const             sfbOffset,
        SECTION_DATA* const RESTRICT sectionData,
        const INT* const             noiseNrg,
        const INT* const             isBook,
        const INT* const             isScale,
        const UINT                   syntaxFlags
        )
{
  sectionData->blockType      = blockType;
  sectionData->sfbCnt         = sfbCnt;
  sectionData->sfbPerGroup    = sfbPerGroup;
  sectionData->noOfGroups     = sfbCnt / sfbPerGroup;
  sectionData->maxSfbPerGroup = maxSfbPerGroup;

  FDKaacEnc_noiselessCounter(
                   sectionData,
                   hBC->mergeGainLookUp,
                   (lookUpTable)hBC->bitLookUp,
                   quantSpectrum,
                   maxValueInSfb,
                   sfbOffset,
                   blockType,
                   noiseNrg,
                   isBook,
                   (syntaxFlags & AC_ER_VCB11)?1:0);

  FDKaacEnc_scfCount(
           scalefac,
           maxValueInSfb,
           sectionData,
           isScale);

  FDKaacEnc_noiseCount(sectionData,
             noiseNrg);

  return (sectionData->huffmanBits +
          sectionData->sideInfoBits +
          sectionData->scalefacBits +
          sectionData->noiseNrgBits);
}

INT FDKaacEnc_BCNew(BITCNTR_STATE **phBC
         ,UCHAR* dynamic_RAM
         )
{
  BITCNTR_STATE *hBC =  GetRam_aacEnc_BitCntrState();

  if (hBC)
  {
    *phBC = hBC;
    hBC->bitLookUp       = GetRam_aacEnc_BitLookUp(0,dynamic_RAM);
    hBC->mergeGainLookUp = GetRam_aacEnc_MergeGainLookUp(0,dynamic_RAM);
    if (hBC->bitLookUp       == 0 ||
        hBC->mergeGainLookUp == 0)
    {
      return 1;
    }
  }
  return (hBC == 0) ? 1 : 0;
}

void FDKaacEnc_BCClose(BITCNTR_STATE **phBC)
{
  if (*phBC!=NULL) {

    FreeRam_aacEnc_BitCntrState(phBC);
  }
}