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+
+/* -----------------------------------------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2012 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
+  All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
+the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
+This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
+audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
+independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
+of the MPEG specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
+may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
+individually for the purpose of encoding or decoding bit streams in products that are compliant with
+the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
+these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
+software may already be covered under those patent licenses when it is used for those licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
+are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
+applications information and documentation.
+
+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.
+
+You must retain the complete text of this software license in the documentation and/or other materials
+provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
+You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived from this library without
+prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
+software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
+and the date of any change. For modified versions of the FDK AAC Codec, the term
+"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
+"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
+ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
+respect to this software.
+
+You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
+by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
+"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
+of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
+including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
+or business interruption, however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of this software, even if
+advised of the possibility of such damage.
+
+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
+----------------------------------------------------------------------------------------------------------- */
+
+#include "code_env.h"
+#include "sbr_rom.h"
+
+/*****************************************************************************
+
+ functionname: FDKsbrEnc_InitSbrHuffmanTables
+ description:  initializes Huffman Tables dependent on chosen amp_res
+ returns:      error handle
+ input:
+ output:
+
+*****************************************************************************/
+INT
+FDKsbrEnc_InitSbrHuffmanTables (HANDLE_SBR_ENV_DATA       sbrEnvData,
+                      HANDLE_SBR_CODE_ENVELOPE  henv,
+                      HANDLE_SBR_CODE_ENVELOPE  hnoise,
+                      AMP_RES                   amp_res)
+{
+  if ( (!henv)  ||  (!hnoise)  || (!sbrEnvData) )
+    return (1); /* not init. */
+
+  sbrEnvData->init_sbr_amp_res = amp_res;
+
+  switch (amp_res) {
+  case  SBR_AMP_RES_3_0:
+    /*envelope data*/
+
+    /*Level/Pan - coding */
+    sbrEnvData->hufftableLevelTimeC   = v_Huff_envelopeLevelC11T;
+    sbrEnvData->hufftableLevelTimeL   = v_Huff_envelopeLevelL11T;
+    sbrEnvData->hufftableBalanceTimeC = bookSbrEnvBalanceC11T;
+    sbrEnvData->hufftableBalanceTimeL = bookSbrEnvBalanceL11T;
+
+    sbrEnvData->hufftableLevelFreqC   = v_Huff_envelopeLevelC11F;
+    sbrEnvData->hufftableLevelFreqL   = v_Huff_envelopeLevelL11F;
+    sbrEnvData->hufftableBalanceFreqC = bookSbrEnvBalanceC11F;
+    sbrEnvData->hufftableBalanceFreqL = bookSbrEnvBalanceL11F;
+
+    /*Right/Left - coding */
+    sbrEnvData->hufftableTimeC        = v_Huff_envelopeLevelC11T;
+    sbrEnvData->hufftableTimeL        = v_Huff_envelopeLevelL11T;
+    sbrEnvData->hufftableFreqC        = v_Huff_envelopeLevelC11F;
+    sbrEnvData->hufftableFreqL        = v_Huff_envelopeLevelL11F;
+
+    sbrEnvData->codeBookScfLavBalance  = CODE_BOOK_SCF_LAV_BALANCE11;
+    sbrEnvData->codeBookScfLav         = CODE_BOOK_SCF_LAV11;
+
+    sbrEnvData->si_sbr_start_env_bits           = SI_SBR_START_ENV_BITS_AMP_RES_3_0;
+    sbrEnvData->si_sbr_start_env_bits_balance   = SI_SBR_START_ENV_BITS_BALANCE_AMP_RES_3_0;
+    break;
+
+  case SBR_AMP_RES_1_5:
+   /*envelope data*/
+
+    /*Level/Pan - coding */
+    sbrEnvData->hufftableLevelTimeC   = v_Huff_envelopeLevelC10T;
+    sbrEnvData->hufftableLevelTimeL   = v_Huff_envelopeLevelL10T;
+    sbrEnvData->hufftableBalanceTimeC = bookSbrEnvBalanceC10T;
+    sbrEnvData->hufftableBalanceTimeL = bookSbrEnvBalanceL10T;
+
+    sbrEnvData->hufftableLevelFreqC   = v_Huff_envelopeLevelC10F;
+    sbrEnvData->hufftableLevelFreqL   = v_Huff_envelopeLevelL10F;
+    sbrEnvData->hufftableBalanceFreqC = bookSbrEnvBalanceC10F;
+    sbrEnvData->hufftableBalanceFreqL = bookSbrEnvBalanceL10F;
+
+    /*Right/Left - coding */
+    sbrEnvData->hufftableTimeC        = v_Huff_envelopeLevelC10T;
+    sbrEnvData->hufftableTimeL        = v_Huff_envelopeLevelL10T;
+    sbrEnvData->hufftableFreqC        = v_Huff_envelopeLevelC10F;
+    sbrEnvData->hufftableFreqL        = v_Huff_envelopeLevelL10F;
+
+    sbrEnvData->codeBookScfLavBalance = CODE_BOOK_SCF_LAV_BALANCE10;
+    sbrEnvData->codeBookScfLav = CODE_BOOK_SCF_LAV10;
+
+    sbrEnvData->si_sbr_start_env_bits           = SI_SBR_START_ENV_BITS_AMP_RES_1_5;
+    sbrEnvData->si_sbr_start_env_bits_balance   = SI_SBR_START_ENV_BITS_BALANCE_AMP_RES_1_5;
+    break;
+
+  default:
+    return (1); /* undefined amp_res mode */
+  }
+
+  /* these are common to both amp_res values */
+  /*Noise data*/
+
+  /*Level/Pan - coding */
+  sbrEnvData->hufftableNoiseLevelTimeC   = v_Huff_NoiseLevelC11T;
+  sbrEnvData->hufftableNoiseLevelTimeL   = v_Huff_NoiseLevelL11T;
+  sbrEnvData->hufftableNoiseBalanceTimeC = bookSbrNoiseBalanceC11T;
+  sbrEnvData->hufftableNoiseBalanceTimeL = bookSbrNoiseBalanceL11T;
+
+  sbrEnvData->hufftableNoiseLevelFreqC   = v_Huff_envelopeLevelC11F;
+  sbrEnvData->hufftableNoiseLevelFreqL   = v_Huff_envelopeLevelL11F;
+  sbrEnvData->hufftableNoiseBalanceFreqC = bookSbrEnvBalanceC11F;
+  sbrEnvData->hufftableNoiseBalanceFreqL = bookSbrEnvBalanceL11F;
+
+
+  /*Right/Left - coding */
+  sbrEnvData->hufftableNoiseTimeC        = v_Huff_NoiseLevelC11T;
+  sbrEnvData->hufftableNoiseTimeL        = v_Huff_NoiseLevelL11T;
+  sbrEnvData->hufftableNoiseFreqC        = v_Huff_envelopeLevelC11F;
+  sbrEnvData->hufftableNoiseFreqL        = v_Huff_envelopeLevelL11F;
+
+  sbrEnvData->si_sbr_start_noise_bits         = SI_SBR_START_NOISE_BITS_AMP_RES_3_0;
+  sbrEnvData->si_sbr_start_noise_bits_balance = SI_SBR_START_NOISE_BITS_BALANCE_AMP_RES_3_0;
+
+
+  /* init envelope tables and codebooks */
+  henv->codeBookScfLavBalanceTime = sbrEnvData->codeBookScfLavBalance;
+  henv->codeBookScfLavBalanceFreq = sbrEnvData->codeBookScfLavBalance;
+  henv->codeBookScfLavLevelTime = sbrEnvData->codeBookScfLav;
+  henv->codeBookScfLavLevelFreq = sbrEnvData->codeBookScfLav;
+  henv->codeBookScfLavTime = sbrEnvData->codeBookScfLav;
+  henv->codeBookScfLavFreq = sbrEnvData->codeBookScfLav;
+
+  henv->hufftableLevelTimeL = sbrEnvData->hufftableLevelTimeL;
+  henv->hufftableBalanceTimeL = sbrEnvData->hufftableBalanceTimeL;
+  henv->hufftableTimeL = sbrEnvData->hufftableTimeL;
+  henv->hufftableLevelFreqL = sbrEnvData->hufftableLevelFreqL;
+  henv->hufftableBalanceFreqL = sbrEnvData->hufftableBalanceFreqL;
+  henv->hufftableFreqL = sbrEnvData->hufftableFreqL;
+
+  henv->codeBookScfLavFreq = sbrEnvData->codeBookScfLav;
+  henv->codeBookScfLavTime = sbrEnvData->codeBookScfLav;
+
+  henv->start_bits = sbrEnvData->si_sbr_start_env_bits;
+  henv->start_bits_balance = sbrEnvData->si_sbr_start_env_bits_balance;
+
+
+  /* init noise tables and codebooks */
+
+  hnoise->codeBookScfLavBalanceTime = CODE_BOOK_SCF_LAV_BALANCE11;
+  hnoise->codeBookScfLavBalanceFreq = CODE_BOOK_SCF_LAV_BALANCE11;
+  hnoise->codeBookScfLavLevelTime = CODE_BOOK_SCF_LAV11;
+  hnoise->codeBookScfLavLevelFreq = CODE_BOOK_SCF_LAV11;
+  hnoise->codeBookScfLavTime = CODE_BOOK_SCF_LAV11;
+  hnoise->codeBookScfLavFreq = CODE_BOOK_SCF_LAV11;
+
+  hnoise->hufftableLevelTimeL = sbrEnvData->hufftableNoiseLevelTimeL;
+  hnoise->hufftableBalanceTimeL = sbrEnvData->hufftableNoiseBalanceTimeL;
+  hnoise->hufftableTimeL = sbrEnvData->hufftableNoiseTimeL;
+  hnoise->hufftableLevelFreqL = sbrEnvData->hufftableNoiseLevelFreqL;
+  hnoise->hufftableBalanceFreqL = sbrEnvData->hufftableNoiseBalanceFreqL;
+  hnoise->hufftableFreqL = sbrEnvData->hufftableNoiseFreqL;
+
+
+  hnoise->start_bits = sbrEnvData->si_sbr_start_noise_bits;
+  hnoise->start_bits_balance = sbrEnvData->si_sbr_start_noise_bits_balance;
+
+  /* No delta coding in time from the previous frame due to 1.5dB FIx-FIX rule */
+  henv->upDate = 0;
+  hnoise->upDate = 0;
+  return  (0);
+}
+
+/*******************************************************************************
+ Functionname:  indexLow2High
+ *******************************************************************************
+
+ Description:   Nice small patch-functions in order to cope with non-factor-2
+                ratios between high-res and low-res
+
+ Arguments:     INT offset, INT index, FREQ_RES res
+
+ Return:        INT
+
+*******************************************************************************/
+static INT indexLow2High(INT offset, INT index, FREQ_RES res)
+{
+
+  if(res == FREQ_RES_LOW)
+  {
+    if (offset >= 0)
+    {
+        if (index < offset)
+          return(index);
+        else
+          return(2*index - offset);
+    }
+    else
+    {
+        offset = -offset;
+        if (index < offset)
+          return(2*index+index);
+        else
+          return(2*index + offset);
+    }
+  }
+  else
+    return(index);
+}
+
+
+
+/*******************************************************************************
+ Functionname:  mapLowResEnergyVal
+ *******************************************************************************
+
+ Description:
+
+ Arguments:     INT currVal,INT* prevData, INT offset, INT index, FREQ_RES res
+
+ Return:        none
+
+*******************************************************************************/
+static void mapLowResEnergyVal(SCHAR currVal, SCHAR* prevData, INT offset, INT index, FREQ_RES res)
+{
+
+  if(res == FREQ_RES_LOW)
+  {
+    if (offset >= 0)
+    {
+        if(index < offset)
+            prevData[index] = currVal;
+        else
+        {
+            prevData[2*index - offset] = currVal;
+            prevData[2*index+1 - offset] = currVal;
+        }
+    }
+    else
+    {
+        offset = -offset;
+        if (index < offset)
+        {
+            prevData[3*index] = currVal;
+            prevData[3*index+1] = currVal;
+            prevData[3*index+2] = currVal;
+        }
+        else
+        {
+            prevData[2*index + offset] = currVal;
+            prevData[2*index + 1 + offset] = currVal;
+        }
+    }
+  }
+  else
+    prevData[index] = currVal;
+}
+
+
+
+/*******************************************************************************
+ Functionname:  computeBits
+ *******************************************************************************
+
+ Description:
+
+ Arguments:     INT delta,
+                INT codeBookScfLavLevel,
+                INT codeBookScfLavBalance,
+                const UCHAR * hufftableLevel,
+                const UCHAR * hufftableBalance, INT coupling, INT channel)
+
+ Return:        INT
+
+*******************************************************************************/
+static INT
+computeBits (SCHAR *delta,
+             INT codeBookScfLavLevel,
+             INT codeBookScfLavBalance,
+             const UCHAR * hufftableLevel,
+             const UCHAR * hufftableBalance, INT coupling, INT channel)
+{
+  INT index;
+  INT delta_bits = 0;
+
+  if (coupling) {
+    if (channel == 1)
+      {
+        if (*delta < 0)
+          index = fixMax(*delta, -codeBookScfLavBalance);
+        else
+          index = fixMin(*delta,  codeBookScfLavBalance);
+
+        if (index != *delta) {
+          *delta = index;
+          return (10000);
+        }
+
+        delta_bits = hufftableBalance[index + codeBookScfLavBalance];
+      }
+    else {
+      if (*delta < 0)
+        index = fixMax(*delta, -codeBookScfLavLevel);
+      else
+        index = fixMin(*delta,  codeBookScfLavLevel);
+
+      if (index != *delta) {
+        *delta = index;
+        return (10000);
+      }
+      delta_bits = hufftableLevel[index + codeBookScfLavLevel];
+    }
+  }
+  else {
+    if (*delta < 0)
+      index = fixMax(*delta, -codeBookScfLavLevel);
+    else
+      index = fixMin(*delta,  codeBookScfLavLevel);
+
+    if (index != *delta) {
+      *delta = index;
+      return (10000);
+    }
+    delta_bits = hufftableLevel[index + codeBookScfLavLevel];
+  }
+
+  return (delta_bits);
+}
+
+
+
+
+/*******************************************************************************
+ Functionname:  FDKsbrEnc_codeEnvelope
+ *******************************************************************************
+
+ Description:
+
+ Arguments:     INT *sfb_nrg,
+                const FREQ_RES *freq_res,
+                SBR_CODE_ENVELOPE * h_sbrCodeEnvelope,
+                INT *directionVec, INT scalable, INT nEnvelopes, INT channel,
+                INT headerActive)
+
+ Return:        none
+                h_sbrCodeEnvelope->sfb_nrg_prev is modified !
+                sfb_nrg is modified
+                h_sbrCodeEnvelope->update is modfied !
+                *directionVec is modified
+
+*******************************************************************************/
+void
+FDKsbrEnc_codeEnvelope(SCHAR             *sfb_nrg,
+                       const FREQ_RES    *freq_res,
+                       SBR_CODE_ENVELOPE *h_sbrCodeEnvelope,
+                       INT               *directionVec,
+                       INT                coupling,
+                       INT                nEnvelopes,
+                       INT                channel,
+                       INT                headerActive)
+{
+  INT i, no_of_bands, band;
+  FIXP_DBL tmp1,tmp2,tmp3,dF_edge_1stEnv;
+  SCHAR *ptr_nrg;
+
+  INT codeBookScfLavLevelTime;
+  INT codeBookScfLavLevelFreq;
+  INT codeBookScfLavBalanceTime;
+  INT codeBookScfLavBalanceFreq;
+  const UCHAR *hufftableLevelTimeL;
+  const UCHAR *hufftableBalanceTimeL;
+  const UCHAR *hufftableLevelFreqL;
+  const UCHAR *hufftableBalanceFreqL;
+
+  INT offset = h_sbrCodeEnvelope->offset;
+  INT envDataTableCompFactor;
+
+  INT delta_F_bits = 0, delta_T_bits = 0;
+  INT use_dT;
+
+  SCHAR delta_F[MAX_FREQ_COEFFS];
+  SCHAR delta_T[MAX_FREQ_COEFFS];
+  SCHAR last_nrg, curr_nrg;
+
+  tmp1 = FL2FXCONST_DBL(0.5f) >> (DFRACT_BITS-16-1);
+  tmp2 = h_sbrCodeEnvelope->dF_edge_1stEnv >> (DFRACT_BITS-16);
+  tmp3 = (FIXP_DBL)(((INT)(LONG)h_sbrCodeEnvelope->dF_edge_incr*h_sbrCodeEnvelope->dF_edge_incr_fac) >> (DFRACT_BITS-16));
+
+  dF_edge_1stEnv = tmp1 + tmp2 + tmp3;
+
+  if (coupling) {
+    codeBookScfLavLevelTime = h_sbrCodeEnvelope->codeBookScfLavLevelTime;
+    codeBookScfLavLevelFreq = h_sbrCodeEnvelope->codeBookScfLavLevelFreq;
+    codeBookScfLavBalanceTime = h_sbrCodeEnvelope->codeBookScfLavBalanceTime;
+    codeBookScfLavBalanceFreq = h_sbrCodeEnvelope->codeBookScfLavBalanceFreq;
+    hufftableLevelTimeL = h_sbrCodeEnvelope->hufftableLevelTimeL;
+    hufftableBalanceTimeL = h_sbrCodeEnvelope->hufftableBalanceTimeL;
+    hufftableLevelFreqL = h_sbrCodeEnvelope->hufftableLevelFreqL;
+    hufftableBalanceFreqL = h_sbrCodeEnvelope->hufftableBalanceFreqL;
+  }
+  else {
+    codeBookScfLavLevelTime = h_sbrCodeEnvelope->codeBookScfLavTime;
+    codeBookScfLavLevelFreq = h_sbrCodeEnvelope->codeBookScfLavFreq;
+    codeBookScfLavBalanceTime = h_sbrCodeEnvelope->codeBookScfLavTime;
+    codeBookScfLavBalanceFreq = h_sbrCodeEnvelope->codeBookScfLavFreq;
+    hufftableLevelTimeL = h_sbrCodeEnvelope->hufftableTimeL;
+    hufftableBalanceTimeL = h_sbrCodeEnvelope->hufftableTimeL;
+    hufftableLevelFreqL = h_sbrCodeEnvelope->hufftableFreqL;
+    hufftableBalanceFreqL = h_sbrCodeEnvelope->hufftableFreqL;
+  }
+
+  if(coupling == 1 && channel == 1)
+    envDataTableCompFactor = 1;       /*should be one when the new huffman-tables are ready*/
+  else
+    envDataTableCompFactor = 0;
+
+
+  if (h_sbrCodeEnvelope->deltaTAcrossFrames == 0)
+    h_sbrCodeEnvelope->upDate = 0;
+
+  /* no delta coding in time in case of a header */
+  if (headerActive)
+    h_sbrCodeEnvelope->upDate = 0;
+
+
+  for (i = 0; i < nEnvelopes; i++)
+  {
+    if (freq_res[i] == FREQ_RES_HIGH)
+      no_of_bands = h_sbrCodeEnvelope->nSfb[FREQ_RES_HIGH];
+    else
+      no_of_bands = h_sbrCodeEnvelope->nSfb[FREQ_RES_LOW];
+
+
+    ptr_nrg = sfb_nrg;
+    curr_nrg = *ptr_nrg;
+
+    delta_F[0] = curr_nrg >> envDataTableCompFactor;
+
+    if (coupling && channel == 1)
+      delta_F_bits = h_sbrCodeEnvelope->start_bits_balance;
+    else
+      delta_F_bits = h_sbrCodeEnvelope->start_bits;
+
+
+    if(h_sbrCodeEnvelope->upDate != 0)
+    {
+      delta_T[0] = (curr_nrg - h_sbrCodeEnvelope->sfb_nrg_prev[0]) >> envDataTableCompFactor;
+
+      delta_T_bits = computeBits (&delta_T[0],
+                                  codeBookScfLavLevelTime,
+                                  codeBookScfLavBalanceTime,
+                                  hufftableLevelTimeL,
+                                  hufftableBalanceTimeL, coupling, channel);
+    }
+
+
+    mapLowResEnergyVal(curr_nrg, h_sbrCodeEnvelope->sfb_nrg_prev, offset, 0, freq_res[i]);
+
+    /* ensure that nrg difference is not higher than codeBookScfLavXXXFreq */
+    if ( coupling && channel == 1 ) {
+      for (band = no_of_bands - 1; band > 0; band--) {
+        if ( ptr_nrg[band] - ptr_nrg[band-1] > codeBookScfLavBalanceFreq ) {
+          ptr_nrg[band-1] = ptr_nrg[band] - codeBookScfLavBalanceFreq;
+        }
+      }
+      for (band = 1; band < no_of_bands; band++) {
+        if ( ptr_nrg[band-1] - ptr_nrg[band] > codeBookScfLavBalanceFreq ) {
+          ptr_nrg[band] = ptr_nrg[band-1] - codeBookScfLavBalanceFreq;
+        }
+      }
+    }
+    else {
+      for (band = no_of_bands - 1; band > 0; band--) {
+        if ( ptr_nrg[band] - ptr_nrg[band-1] > codeBookScfLavLevelFreq ) {
+          ptr_nrg[band-1] = ptr_nrg[band] - codeBookScfLavLevelFreq;
+        }
+      }
+      for (band = 1; band < no_of_bands; band++) {
+        if ( ptr_nrg[band-1] - ptr_nrg[band] > codeBookScfLavLevelFreq ) {
+          ptr_nrg[band] = ptr_nrg[band-1] - codeBookScfLavLevelFreq;
+        }
+      }
+    }
+
+
+    /* Coding loop*/
+    for (band = 1; band < no_of_bands; band++)
+    {
+      last_nrg = (*ptr_nrg);
+      ptr_nrg++;
+      curr_nrg = (*ptr_nrg);
+
+      delta_F[band] = (curr_nrg - last_nrg) >> envDataTableCompFactor;
+
+      delta_F_bits += computeBits (&delta_F[band],
+                                   codeBookScfLavLevelFreq,
+                                   codeBookScfLavBalanceFreq,
+                                   hufftableLevelFreqL,
+                                   hufftableBalanceFreqL, coupling, channel);
+
+      if(h_sbrCodeEnvelope->upDate != 0)
+      {
+        delta_T[band] = curr_nrg - h_sbrCodeEnvelope->sfb_nrg_prev[indexLow2High(offset, band, freq_res[i])];
+        delta_T[band] = delta_T[band] >> envDataTableCompFactor;
+      }
+
+      mapLowResEnergyVal(curr_nrg, h_sbrCodeEnvelope->sfb_nrg_prev, offset, band, freq_res[i]);
+
+      if(h_sbrCodeEnvelope->upDate != 0)
+      {
+        delta_T_bits += computeBits (&delta_T[band],
+                                     codeBookScfLavLevelTime,
+                                     codeBookScfLavBalanceTime,
+                                     hufftableLevelTimeL,
+                                     hufftableBalanceTimeL, coupling, channel);
+      }
+    }
+
+    /* Replace sfb_nrg with deltacoded samples and set flag */
+    if (i == 0) {
+      INT tmp_bits;
+      tmp_bits = (((delta_T_bits * dF_edge_1stEnv) >> (DFRACT_BITS-18)) + (FIXP_DBL)1) >> 1;
+      use_dT = (h_sbrCodeEnvelope->upDate != 0 && (delta_F_bits > tmp_bits));
+    }
+    else
+      use_dT = (delta_T_bits < delta_F_bits && h_sbrCodeEnvelope->upDate != 0);
+
+    if (use_dT)
+    {
+      directionVec[i] = TIME;
+      FDKmemcpy (sfb_nrg, delta_T, no_of_bands * sizeof (SCHAR));
+    }
+    else {
+      h_sbrCodeEnvelope->upDate = 0;
+      directionVec[i] = FREQ;
+      FDKmemcpy (sfb_nrg, delta_F, no_of_bands * sizeof (SCHAR));
+    }
+    sfb_nrg += no_of_bands;
+    h_sbrCodeEnvelope->upDate = 1;
+  }
+
+}
+
+
+/*******************************************************************************
+ Functionname:  FDKsbrEnc_InitSbrCodeEnvelope
+ *******************************************************************************
+
+ Description:
+
+ Arguments:
+
+ Return:
+
+*******************************************************************************/
+INT
+FDKsbrEnc_InitSbrCodeEnvelope (HANDLE_SBR_CODE_ENVELOPE  h_sbrCodeEnvelope,
+                       INT *nSfb,
+                       INT deltaTAcrossFrames,
+                       FIXP_DBL dF_edge_1stEnv,
+                       FIXP_DBL dF_edge_incr)
+{
+
+  FDKmemclear(h_sbrCodeEnvelope,sizeof(SBR_CODE_ENVELOPE));
+
+  h_sbrCodeEnvelope->deltaTAcrossFrames = deltaTAcrossFrames;
+  h_sbrCodeEnvelope->dF_edge_1stEnv = dF_edge_1stEnv;
+  h_sbrCodeEnvelope->dF_edge_incr = dF_edge_incr;
+  h_sbrCodeEnvelope->dF_edge_incr_fac = 0;
+  h_sbrCodeEnvelope->upDate = 0;
+  h_sbrCodeEnvelope->nSfb[FREQ_RES_LOW] = nSfb[FREQ_RES_LOW];
+  h_sbrCodeEnvelope->nSfb[FREQ_RES_HIGH] = nSfb[FREQ_RES_HIGH];
+  h_sbrCodeEnvelope->offset = 2*h_sbrCodeEnvelope->nSfb[FREQ_RES_LOW] - h_sbrCodeEnvelope->nSfb[FREQ_RES_HIGH];
+
+  return (0);
+}