Fraunhofer AAC codec.

License boilerplate update to follow.

Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5

1 files changed, 743 insertions, 0 deletions

diff --git a/libAACenc/src/dyn_bits.cpp b/libAACenc/src/dyn_bits.cpp
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+/******************************** 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);
+  }
+}
+
+
+