Fraunhofer AAC codec.

License boilerplate update to follow.

Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5

1 files changed, 2109 insertions, 0 deletions

diff --git a/libSBRenc/src/sbr_encoder.cpp b/libSBRenc/src/sbr_encoder.cpp
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+/***************************  Fraunhofer IIS FDK Tools  ***********************
+
+                        (C) Copyright Fraunhofer IIS (2004)
+                               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.
+
+
+   $Id$
+   Author(s): Andreas Ehret
+   Description: SBR encoder top level processing.
+
+   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.
+
+******************************************************************************/
+#include "sbr_encoder.h"
+
+#include "sbr_ram.h"
+#include "sbr_rom.h"
+#include "sbrenc_freq_sca.h"
+#include "env_bit.h"
+#include "cmondata.h"
+#include "sbr_misc.h"
+#include "sbr.h"
+#include "qmf.h"
+
+#include "ps_main.h"
+#include "psenc_hybrid.h"
+
+#define SBRENCODER_LIB_VL0 3
+#define SBRENCODER_LIB_VL1 2
+#define SBRENCODER_LIB_VL2 0
+
+
+
+/***************************************************************************/
+/*
+ * SBR Delay balancing definitions.
+ */
+
+/*
+      input buffer (1ch)
+
+      |------------ 1537   -------------|-----|---------- 2048 -------------|
+           (core2sbr delay     )          ds     (read, core and ds area)
+*/
+
+#define DOWN_SMPL_FAC        (2)
+
+#define SFL(fl)            (fl*DOWN_SMPL_FAC)   /* SBR frame length (hardcoded to downsample factor of 2) */
+#define STS(fl)            (SFL(fl)/64)  /* SBR Time Slots */
+
+#define DELAY_QMF_ANA      (640 - 64)    /* Full bandwidth */
+#define DELAY_QMF_ANAELD   (32)
+#define DELAY_HYB_ANA      (10*64)       /* + 0.5 */
+#define DELAY_HYB_SYN      (6*64 - 32)
+#define DELAY_QMF_SYNELD   (32)
+#define DELAY_DEC_QMF      (6*64)        /* Decoder QMF overlap */
+#define DELAY_QMF_SYN      (2)           /* NO_POLY/2 */
+#define DELAY_QMF_DS       (32)          /* QMF synthesis for downsampled time signal */
+
+/* Delay in QMF paths */
+#define DELAY_SBR(fl)      (DELAY_QMF_ANA + (64*STS(fl)-1) + DELAY_QMF_SYN)
+#define DELAY_PS(fl)       (DELAY_QMF_ANA + DELAY_HYB_ANA + DELAY_DEC_QMF + (64*STS(fl)-1) + DELAY_HYB_SYN + DELAY_QMF_SYN)
+#define DELAY_ELDSBR(fl)   (DELAY_QMF_ANAELD + (((fl)+((fl)/2))*2 - 1) + DELAY_QMF_SYNELD)
+
+/* Delay differences for SBR and SBR+PS */
+    #define MAX_DS_FILTER_DELAY (34)                                      /* the additional max downsampler filter delay (source fs) */
+#define DELAY_AAC2SBR(fl)      ((/*RESAMPLER +*/ /*(DELAY_AAC(fl)*2) + */ DELAY_QMF_ANA + DELAY_DEC_QMF + DELAY_QMF_SYN) - DELAY_SBR(fl)) /* 1537 */
+#define DELAY_ELD2SBR(fl)      ((/*RESAMPLER +*/ /*(DELAY_ELD(fl)*2) + */ DELAY_QMF_ANAELD + DELAY_QMF_SYNELD) - DELAY_ELDSBR(fl))
+
+#define DELAY_AAC2PS(fl)       ((DELAY_QMF_ANA + DELAY_QMF_DS + /*(DELAY_AAC(fl)*2)*/ + DELAY_QMF_ANA + DELAY_DEC_QMF + DELAY_HYB_SYN + DELAY_QMF_SYN) - DELAY_PS(fl)) /* 2048 - 463*2 */
+
+/* Assumption: that the sample delay resulting of of DELAY_AAC2PS is always smaller than the sample delay implied by DELAY_AAC2SBR */
+#define MAX_SAMPLE_DELAY       (DELAY_AAC2SBR(1024) + MAX_DS_FILTER_DELAY)
+
+/***************************************************************************/
+
+
+
+#define INVALID_TABLE_IDX -1
+
+/***************************************************************************/
+/*!
+
+  \brief  Selects the SBR tuning settings to use dependent on number of
+          channels, bitrate, sample rate and core coder
+
+  \return Index to the appropriate table
+
+****************************************************************************/
+static INT
+getSbrTuningTableIndex(UINT bitrate,    /*! the total bitrate in bits/sec */
+                       UINT numChannels,/*! the number of channels for the core coder */
+                       UINT sampleRate,  /*! the sampling rate of the core coder */
+                       AUDIO_OBJECT_TYPE core
+                       )
+{
+  int i, paramSetTop;
+
+  if (core == AOT_ER_AAC_ELD) {
+    paramSetTop = SBRENC_TUNING_SIZE;
+    i = 126;
+  } else {
+    paramSetTop = 126;
+    i = 0;
+  }
+
+  for (; i < paramSetTop ; i++) {
+    if (numChannels == sbrTuningTable [i].numChannels) {
+      if ((sampleRate == sbrTuningTable [i].sampleRate) &&
+          (bitrate >= sbrTuningTable [i].bitrateFrom) &&
+          (bitrate < sbrTuningTable [i].bitrateTo)) {
+        return i ;
+      }
+    }
+  }
+
+  return INVALID_TABLE_IDX;
+}
+
+/***************************************************************************/
+/*!
+
+  \brief  Selects the PS tuning settings to use dependent on bitrate
+  and core coder
+
+  \return Index to the appropriate table
+
+****************************************************************************/
+static INT
+getPsTuningTableIndex(UINT bitrate){
+
+  INT i, paramSets = sizeof (psTuningTable) / sizeof (psTuningTable [0]);
+
+  for (i = 0 ; i < paramSets ; i++)  {
+    if ((bitrate >= psTuningTable [i].bitrateFrom) &&
+        (bitrate < psTuningTable [i].bitrateTo)) {
+      return i ;
+    }
+  }
+
+  return INVALID_TABLE_IDX;
+}
+
+
+/***************************************************************************/
+/*!
+
+  \brief  tells us, if for the given coreCoder, bitrate, number of channels
+          and input sampling rate an SBR setting is available. If yes, it
+          tells us also the core sampling rate we would need to run with
+
+  \return a flag indicating success: yes (1) or no (0)
+
+****************************************************************************/
+static UINT
+FDKsbrEnc_IsSbrSettingAvail (UINT bitrate,          /*! the total bitrate in bits/sec */
+                   UINT vbrMode,          /*! the vbr paramter, 0 means constant bitrate */
+                   UINT numOutputChannels,/*! the number of channels for the core coder */
+                   UINT sampleRateInput,   /*! the input sample rate [in Hz] */
+                   AUDIO_OBJECT_TYPE core
+                   )
+{
+  INT idx = INVALID_TABLE_IDX;
+  UINT sampleRateCore;
+
+  if (sampleRateInput < 16000)
+    return 0;
+
+  if (bitrate==0) {
+    /* map vbr quality to bitrate */
+    if (vbrMode < 30)
+      bitrate = 24000;
+    else if (vbrMode < 40)
+      bitrate = 28000;
+    else if (vbrMode < 60)
+      bitrate = 32000;
+    else if (vbrMode < 75)
+      bitrate = 40000;
+    else
+      bitrate = 48000;
+    bitrate *= numOutputChannels;
+  }
+
+  /* try DOWN_SMPL_FAC of the input sampling rate */
+  sampleRateCore = sampleRateInput/DOWN_SMPL_FAC;
+  idx = getSbrTuningTableIndex(bitrate, numOutputChannels, sampleRateCore, core);
+
+  return (idx == INVALID_TABLE_IDX ? 0 : 1);
+}
+
+
+/***************************************************************************/
+/*!
+
+  \brief  Adjusts the SBR settings according to the chosen core coder
+          settings which are accessible via config->codecSettings
+
+  \return A flag indicating success: yes (1) or no (0)
+
+****************************************************************************/
+static UINT
+FDKsbrEnc_AdjustSbrSettings (const sbrConfigurationPtr config, /*! output, modified */
+                   UINT bitRate,             /*! the total bitrate in bits/sec */
+                   UINT numChannels,         /*! the core coder number of channels */
+                   UINT fsCore,              /*! the core coder sampling rate in Hz */
+                   UINT transFac,            /*! the short block to long block ratio */
+                   UINT standardBitrate,     /*! the standard bitrate per channel in bits/sec */
+                   UINT vbrMode,             /*! the vbr paramter, 0 poor quality .. 100 high quality*/
+                   UINT useSpeechConfig,     /*!< adapt tuning parameters for speech ? */
+                   UINT lcsMode,             /*! the low complexity stereo mode */
+                   UINT bParametricStereo,   /*!< use parametric stereo */
+                   AUDIO_OBJECT_TYPE core)   /* Core audio codec object type */
+{
+  INT idx = INVALID_TABLE_IDX;
+  UINT sampleRate;
+
+  /* set the codec settings */
+  config->codecSettings.bitRate         = bitRate;
+  config->codecSettings.nChannels       = numChannels;
+  config->codecSettings.sampleFreq      = fsCore;
+  config->codecSettings.transFac        = transFac;
+  config->codecSettings.standardBitrate = standardBitrate;
+  sampleRate  = fsCore * DOWN_SMPL_FAC;
+
+  if (bitRate==0) {
+    /* map vbr quality to bitrate */
+    if (vbrMode < 30)
+      bitRate = 24000;
+    else if (vbrMode < 40)
+      bitRate = 28000;
+    else if (vbrMode < 60)
+      bitRate = 32000;
+    else if (vbrMode < 75)
+      bitRate = 40000;
+    else
+      bitRate = 48000;
+    bitRate *= numChannels;
+    /* fix to enable mono vbrMode<40 @ 44.1 of 48kHz */
+    if (numChannels==1) {
+      if (sampleRate==44100 || sampleRate==48000) {
+        if (vbrMode<40) bitRate = 32000;
+      }
+    }
+  }
+
+  idx = getSbrTuningTableIndex(bitRate,numChannels,fsCore, core);
+
+  if (idx != INVALID_TABLE_IDX) {
+    config->startFreq       = sbrTuningTable[idx].startFreq ;
+    config->stopFreq        = sbrTuningTable[idx].stopFreq ;
+    if (useSpeechConfig) {
+      config->startFreq     = sbrTuningTable[idx].startFreqSpeech;
+      config->stopFreq      = sbrTuningTable[idx].stopFreqSpeech;
+    }
+
+    config->sbr_noise_bands = sbrTuningTable[idx].numNoiseBands ;
+    if (core == AOT_ER_AAC_ELD)
+      config->init_amp_res_FF = SBR_AMP_RES_1_5;
+    config->noiseFloorOffset= sbrTuningTable[idx].noiseFloorOffset;
+
+    config->ana_max_level   = sbrTuningTable[idx].noiseMaxLevel ;
+    config->stereoMode      = sbrTuningTable[idx].stereoMode ;
+    config->freqScale       = sbrTuningTable[idx].freqScale ;
+
+    /* adjust usage of parametric coding dependent on bitrate and speech config flag */
+    if (useSpeechConfig)
+      config->parametricCoding  = 0;
+
+    if (core == AOT_ER_AAC_ELD) {
+      if (bitRate < 28000)
+        config->init_amp_res_FF = SBR_AMP_RES_3_0;
+      config->SendHeaderDataTime = -1;
+    }
+
+    if (numChannels == 1) {
+      if (bitRate < 16000) {
+        config->parametricCoding  = 0;
+      }
+    }
+    else {
+      if (bitRate < 20000) {
+        config->parametricCoding  = 0;
+      }
+    }
+
+    config->useSpeechConfig = useSpeechConfig;
+
+    /* PS settings */
+    config->bParametricStereo = bParametricStereo;
+
+    return 1 ;
+  }
+  else {
+    return 0 ;
+  }
+}
+
+/*****************************************************************************
+
+ functionname: FDKsbrEnc_InitializeSbrDefaults
+ description:  initializes the SBR confifuration
+ returns:      error status
+ input:        - core codec type,
+               - fac of SBR to core frame length,
+               - core frame length
+ output:       initialized SBR configuration
+
+*****************************************************************************/
+static UINT
+FDKsbrEnc_InitializeSbrDefaults (sbrConfigurationPtr config,
+                                 INT                 coreSbrFrameLenFac,
+                                 UINT                codecGranuleLen)
+{
+    if ( (coreSbrFrameLenFac != 2) ||
+         (codecGranuleLen*coreSbrFrameLenFac > QMF_CHANNELS*QMF_MAX_TIME_SLOTS) )
+       return(1);
+
+    config->SendHeaderDataTime     = 1000;
+    config->useWaveCoding          = 0;
+    config->crcSbr                 = 0;
+    config->dynBwSupported         = 1;
+    config->tran_thr               = 13000;
+    config->parametricCoding       = 1;
+
+    config->sbrFrameSize  = codecGranuleLen * coreSbrFrameLenFac;
+
+
+    /* sbr default parameters */
+    config->sbr_data_extra         = 0;
+    config->amp_res                = SBR_AMP_RES_3_0 ;
+    config->tran_fc                = 0 ;
+    config->tran_det_mode          = 1 ;
+    config->spread                 = 1 ;
+    config->stat                   = 0 ;
+    config->e                      = 1 ;
+    config->deltaTAcrossFrames     = 1 ;
+    config->dF_edge_1stEnv         = FL2FXCONST_DBL(0.3f) ;
+    config->dF_edge_incr           = FL2FXCONST_DBL(0.3f) ;
+
+    config->sbr_invf_mode   = INVF_SWITCHED;
+    config->sbr_xpos_mode   = XPOS_LC;
+    config->sbr_xpos_ctrl   = SBR_XPOS_CTRL_DEFAULT;
+    config->sbr_xpos_level  = 0;
+    config->useSaPan        = 0;
+    config->dynBwEnabled    = 0;
+    config->bDownSampledSbr = 0;
+
+
+    /* the following parameters are overwritten by the FDKsbrEnc_AdjustSbrSettings() function since
+       they are included in the tuning table */
+    config->stereoMode             = SBR_SWITCH_LRC;
+    config->ana_max_level          = 6;
+    config->noiseFloorOffset       = 0;
+    config->startFreq              = 5; /*  5.9 respectively  6.0 kHz at fs = 44.1/48 kHz */
+    config->stopFreq               = 9; /* 16.2 respectively 16.8 kHz at fs = 44.1/48 kHz */
+
+
+    /* header_extra_1 */
+    config->freqScale       = SBR_FREQ_SCALE_DEFAULT;
+    config->alterScale      = SBR_ALTER_SCALE_DEFAULT;
+    config->sbr_noise_bands = SBR_NOISE_BANDS_DEFAULT;
+
+    /* header_extra_2 */
+    config->sbr_limiter_bands    = SBR_LIMITER_BANDS_DEFAULT;
+    config->sbr_limiter_gains    = SBR_LIMITER_GAINS_DEFAULT;
+    config->sbr_interpol_freq    = SBR_INTERPOL_FREQ_DEFAULT;
+    config->sbr_smoothing_length = SBR_SMOOTHING_LENGTH_DEFAULT;
+
+    return 1;
+}
+
+
+/*****************************************************************************
+
+ functionname: DeleteEnvChannel
+ description:  frees memory of one SBR channel
+ returns:      -
+ input:        handle of channel
+ output:       released handle
+
+*****************************************************************************/
+static void
+deleteEnvChannel (HANDLE_ENV_CHANNEL hEnvCut)
+{
+  if (hEnvCut) {
+
+    /* deleteFrameInfoGenerator (&hEnvCut->SbrEnvFrame); */
+
+
+
+    /* deleteSbrCodeEnvelope (&hEnvCut->sbrCodeEnvelope); */
+
+    /* deleteSbrCodeEnvelope (&hEnvCut->sbrCodeNoiseFloor); */
+
+    FDKsbrEnc_DeleteTonCorrParamExtr(&hEnvCut->TonCorr);
+
+    FDKsbrEnc_deleteExtractSbrEnvelope (&hEnvCut->sbrExtractEnvelope);
+
+    //FreeRam_EnvChannel(phEnvCut);
+  }
+
+}
+
+
+/*****************************************************************************
+
+ functionname: sbrEncoder_ChannelClose
+ description:  close the channel coding handle
+ returns:
+ input:        phSbrChannel
+ output:
+
+*****************************************************************************/
+static void
+sbrEncoder_ChannelClose(HANDLE_SBR_CHANNEL hSbrChannel)
+{
+  if (hSbrChannel != NULL)
+  {
+    deleteEnvChannel (&hSbrChannel->hEnvChannel);
+  }
+}
+
+/*****************************************************************************
+
+ functionname: sbrEncoder_ElementClose
+ description:  close the channel coding handle
+ returns:
+ input:        phSbrChannel
+ output:
+
+*****************************************************************************/
+static void
+sbrEncoder_ElementClose(HANDLE_SBR_ELEMENT *phSbrElement)
+{
+  HANDLE_SBR_ELEMENT hSbrElement = *phSbrElement;
+
+  if (hSbrElement!=NULL) {
+    if (hSbrElement->sbrConfigData.v_k_master)
+      FreeRam_Sbr_v_k_master(&hSbrElement->sbrConfigData.v_k_master);
+    if (hSbrElement->sbrConfigData.freqBandTable[LO])
+      FreeRam_Sbr_freqBandTableLO(&hSbrElement->sbrConfigData.freqBandTable[LO]);
+    if (hSbrElement->sbrConfigData.freqBandTable[HI])
+      FreeRam_Sbr_freqBandTableHI(&hSbrElement->sbrConfigData.freqBandTable[HI]);
+
+    FreeRam_SbrElement(phSbrElement);
+  }
+  return ;
+
+}
+
+
+void sbrEncoder_Close (HANDLE_SBR_ENCODER *phSbrEncoder)
+{
+  HANDLE_SBR_ENCODER hSbrEncoder = *phSbrEncoder;
+
+  if (hSbrEncoder != NULL)
+  {
+    int el, ch;
+
+    for (el=0; el<(6); el++)
+    {
+      if (hSbrEncoder->sbrElement[el]!=NULL) {
+        sbrEncoder_ElementClose(&hSbrEncoder->sbrElement[el]);
+      }
+    }
+
+    /* Close sbr Channels */
+    for (ch=0; ch<(6); ch++)
+    {
+      if (hSbrEncoder->pSbrChannel[ch]) {
+        sbrEncoder_ChannelClose(hSbrEncoder->pSbrChannel[ch]);
+        FreeRam_SbrChannel(&hSbrEncoder->pSbrChannel[ch]);
+      }
+
+      if (hSbrEncoder->QmfAnalysis[ch].FilterStates)
+        FreeRam_Sbr_QmfStatesAnalysis((FIXP_QAS**)&hSbrEncoder->QmfAnalysis[ch].FilterStates);
+
+
+    }
+
+    if (hSbrEncoder->hPsEncConfig)
+      FreeRam_PsEncConf(&hSbrEncoder->hPsEncConfig);
+    if (hSbrEncoder->hParametricStereo)
+      PSEnc_Destroy(&hSbrEncoder->hParametricStereo);
+    if (hSbrEncoder->qmfSynthesisPS.FilterStates)
+      FreeRam_PsQmfStatesSynthesis((FIXP_DBL**)&hSbrEncoder->qmfSynthesisPS.FilterStates);
+
+    /* Release Overlay */
+    FreeRam_SbrDynamic_RAM((FIXP_DBL**)&hSbrEncoder->pSBRdynamic_RAM);
+
+
+    FreeRam_SbrEncoder(phSbrEncoder);
+  }
+
+}
+
+/*****************************************************************************
+
+ functionname: updateFreqBandTable
+ description:  updates vk_master
+ returns:      -
+ input:        config handle
+ output:       error info
+
+*****************************************************************************/
+static INT updateFreqBandTable(HANDLE_SBR_CONFIG_DATA  sbrConfigData,
+                               HANDLE_SBR_HEADER_DATA  sbrHeaderData,
+                               INT noQmfChannels)
+{
+  INT k0, k2;
+
+  if(FDKsbrEnc_FindStartAndStopBand(sbrConfigData->sampleFreq,
+                                    noQmfChannels,
+                                    sbrHeaderData->sbr_start_frequency,
+                                    sbrHeaderData->sbr_stop_frequency,
+                                    sbrHeaderData->sampleRateMode,
+                                    &k0, &k2))
+    return(1);
+
+
+  if(FDKsbrEnc_UpdateFreqScale(sbrConfigData->v_k_master, &sbrConfigData->num_Master,
+                     k0, k2, sbrHeaderData->freqScale,
+                     sbrHeaderData->alterScale))
+    return(1);
+
+
+  sbrHeaderData->sbr_xover_band=0;
+
+
+  if(FDKsbrEnc_UpdateHiRes(sbrConfigData->freqBandTable[HI],
+                           &sbrConfigData->nSfb[HI],
+                           sbrConfigData->v_k_master,
+                           sbrConfigData->num_Master ,
+                           &sbrHeaderData->sbr_xover_band,
+                           sbrHeaderData->sampleRateMode,
+                           noQmfChannels))
+    return(1);
+
+
+  FDKsbrEnc_UpdateLoRes(sbrConfigData->freqBandTable[LO],
+                        &sbrConfigData->nSfb[LO],
+                        sbrConfigData->freqBandTable[HI],
+                        sbrConfigData->nSfb[HI]);
+
+  sbrConfigData->xOverFreq = (sbrConfigData->freqBandTable[LOW_RES][0] * sbrConfigData->sampleFreq / noQmfChannels+1)>>1;
+
+  return (0);
+}
+
+
+/*****************************************************************************
+
+ functionname: resetEnvChannel
+ description:  resets parameters and allocates memory
+ returns:      error status
+ input:
+ output:       hEnv
+
+*****************************************************************************/
+static INT resetEnvChannel (HANDLE_SBR_CONFIG_DATA  sbrConfigData,
+                            HANDLE_SBR_HEADER_DATA  sbrHeaderData,
+                            HANDLE_ENV_CHANNEL      hEnv)
+{
+  /* note !!! hEnv->encEnvData.noOfnoisebands will be updated later in function FDKsbrEnc_extractSbrEnvelope !!!*/
+  hEnv->TonCorr.sbrNoiseFloorEstimate.noiseBands =  sbrHeaderData->sbr_noise_bands;
+
+
+  if(FDKsbrEnc_ResetTonCorrParamExtr(&hEnv->TonCorr,
+                           sbrConfigData->xposCtrlSwitch,
+                           sbrConfigData->freqBandTable[HI][0],
+                           sbrConfigData->v_k_master,
+                           sbrConfigData->num_Master,
+                           sbrConfigData->sampleFreq,
+                           sbrConfigData->freqBandTable,
+                           sbrConfigData->nSfb,
+                           sbrConfigData->noQmfBands))
+    return(1);
+
+  hEnv->sbrCodeNoiseFloor.nSfb[LO] = hEnv->TonCorr.sbrNoiseFloorEstimate.noNoiseBands;
+  hEnv->sbrCodeNoiseFloor.nSfb[HI] = hEnv->TonCorr.sbrNoiseFloorEstimate.noNoiseBands;
+
+  hEnv->sbrCodeEnvelope.nSfb[LO] = sbrConfigData->nSfb[LO];
+  hEnv->sbrCodeEnvelope.nSfb[HI] = sbrConfigData->nSfb[HI];
+
+  hEnv->encEnvData.noHarmonics = sbrConfigData->nSfb[HI];
+
+  hEnv->sbrCodeEnvelope.upDate = 0;
+  hEnv->sbrCodeNoiseFloor.upDate = 0;
+
+  return (0);
+}
+
+/* ****************************** FDKsbrEnc_SbrGetXOverFreq ******************************/
+/**
+ * @fn
+ * @brief       calculates the closest possible crossover frequency
+ * @return      the crossover frequency SBR accepts
+ *
+ */
+static INT
+FDKsbrEnc_SbrGetXOverFreq(HANDLE_SBR_ELEMENT  hEnv,        /*!< handle to SBR encoder instance */
+                          INT                 xoverFreq)   /*!< from core coder suggested crossover frequency */
+{
+  INT band;
+  INT lastDiff, newDiff;
+  INT cutoffSb;
+
+  UCHAR *RESTRICT pVKMaster = hEnv->sbrConfigData.v_k_master;
+
+  /* Check if there is a matching cutoff frequency in the master table */
+  cutoffSb = (4*xoverFreq * hEnv->sbrConfigData.noQmfBands / hEnv->sbrConfigData.sampleFreq + 1)>>1;
+  lastDiff = cutoffSb;
+  for (band = 0; band < hEnv->sbrConfigData.num_Master; band++) {
+
+    newDiff = fixp_abs((INT)pVKMaster[band] - cutoffSb);
+
+    if(newDiff >= lastDiff) {
+      band--;
+      break;
+    }
+
+    lastDiff = newDiff;
+  }
+
+  return ((pVKMaster[band] * hEnv->sbrConfigData.sampleFreq/hEnv->sbrConfigData.noQmfBands+1)>>1);
+}
+
+/*****************************************************************************
+
+ functionname: FDKsbrEnc_EnvEncodeFrame
+ description: performs the sbr envelope calculation for one element
+ returns:
+ input:
+ output:
+
+*****************************************************************************/
+INT
+FDKsbrEnc_EnvEncodeFrame(HANDLE_SBR_ENCODER   hEnvEncoder,
+                         int                  iElement,
+                         INT_PCM             *samples,                 /*!< time samples, always interleaved */
+                         UINT                 timeInStride,            /*!< time buffer channel interleaving stride */
+                         UINT                *sbrDataBits,             /*!< Size of SBR payload  */
+                         UCHAR               *sbrData,                 /*!< SBR payload  */
+                         int                  clearOutput              /*!< Do not consider any input signal */
+                        )
+{
+  HANDLE_SBR_ELEMENT hSbrElement = hEnvEncoder->sbrElement[iElement];
+  FDK_CRCINFO  crcInfo;
+  INT    crcReg;
+  INT    ch;
+  INT    band;
+  INT    cutoffSb;
+  INT    newXOver;
+
+  if (hEnvEncoder == NULL)
+    return -1;
+
+  hSbrElement = hEnvEncoder->sbrElement[iElement];
+
+  if (hSbrElement == NULL)
+    return -1;
+
+
+  /* header bitstream handling */
+  HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData = &hSbrElement->sbrBitstreamData;
+
+  INT psHeaderActive = 0;
+  sbrBitstreamData->HeaderActive = 0;
+
+  /* Anticipate PS header because of internal PS bitstream delay in order to be in sync with SBR header. */
+  if ( sbrBitstreamData->CountSendHeaderData==(sbrBitstreamData->NrSendHeaderData-1) )
+  {
+      psHeaderActive = 1;
+  }
+
+  /* Signal SBR header to be written into bitstream */
+  if ( sbrBitstreamData->CountSendHeaderData==0  )
+  {
+     sbrBitstreamData->HeaderActive = 1;
+  }
+
+  /* Increment header interval counter */
+  if (sbrBitstreamData->NrSendHeaderData == 0) {
+    sbrBitstreamData->CountSendHeaderData = 1;
+  }
+  else {
+    if (sbrBitstreamData->CountSendHeaderData >= 0) {
+      sbrBitstreamData->CountSendHeaderData++;
+      sbrBitstreamData->CountSendHeaderData %= sbrBitstreamData->NrSendHeaderData;
+    }
+  }
+
+  if (hSbrElement->CmonData.dynBwEnabled ) {
+    INT i;
+    for ( i = 4; i > 0; i-- )
+      hSbrElement->dynXOverFreqDelay[i] = hSbrElement->dynXOverFreqDelay[i-1];
+
+    hSbrElement->dynXOverFreqDelay[0] = hSbrElement->CmonData.dynXOverFreqEnc;
+    if (hSbrElement->dynXOverFreqDelay[1] > hSbrElement->dynXOverFreqDelay[2])
+      newXOver = hSbrElement->dynXOverFreqDelay[2];
+    else
+      newXOver = hSbrElement->dynXOverFreqDelay[1];
+
+    /* has the crossover frequency changed? */
+    if ( hSbrElement->sbrConfigData.dynXOverFreq != newXOver ) {
+
+      /* get corresponding master band */
+      cutoffSb = ((4* newXOver * hSbrElement->sbrConfigData.noQmfBands
+                  / hSbrElement->sbrConfigData.sampleFreq)+1)>>1;
+
+      for ( band = 0; band < hSbrElement->sbrConfigData.num_Master; band++ ) {
+        if ( cutoffSb == hSbrElement->sbrConfigData.v_k_master[band] )
+          break;
+      }
+      FDK_ASSERT( band < hSbrElement->sbrConfigData.num_Master );
+
+      hSbrElement->sbrConfigData.dynXOverFreq = newXOver;
+      hSbrElement->sbrHeaderData.sbr_xover_band = band;
+      hSbrElement->sbrBitstreamData.HeaderActive=1;
+      psHeaderActive = 1; /* ps header is one frame delayed */
+
+      /*
+        update vk_master table
+      */
+      if(updateFreqBandTable(&hSbrElement->sbrConfigData,
+                             &hSbrElement->sbrHeaderData,
+                              hSbrElement->sbrConfigData.noQmfBands))
+        return(1);
+
+
+      /* reset SBR channels */
+      INT nEnvCh = hSbrElement->sbrConfigData.nChannels;
+      for ( ch = 0; ch < nEnvCh; ch++ ) {
+        if(resetEnvChannel (&hSbrElement->sbrConfigData,
+                            &hSbrElement->sbrHeaderData,
+                            &hSbrElement->sbrChannel[ch]->hEnvChannel))
+          return(1);
+
+      }
+    }
+  }
+
+  /*
+    allocate space for dummy header and crc
+  */
+  crcReg = FDKsbrEnc_InitSbrBitstream(&hSbrElement->CmonData,
+                                       hSbrElement->payloadDelayLine[hEnvEncoder->nBitstrDelay],
+                                       MAX_PAYLOAD_SIZE*sizeof(UCHAR),
+                                      &crcInfo,
+                                       hSbrElement->sbrConfigData.sbrSyntaxFlags);
+
+  INT error = noError;
+
+  /* Temporal Envelope Data */
+  SBR_FRAME_TEMP_DATA _fData;
+  SBR_FRAME_TEMP_DATA *fData = &_fData;
+  SBR_ENV_TEMP_DATA eData[MAX_NUM_CHANNELS];
+
+  /* Init Temporal Envelope Data */
+  {
+    int i;
+
+    FDKmemclear(&eData[0], sizeof(SBR_ENV_TEMP_DATA));
+    FDKmemclear(&eData[1], sizeof(SBR_ENV_TEMP_DATA));
+    FDKmemclear(fData, sizeof(SBR_FRAME_TEMP_DATA));
+
+    for(i=0; i<MAX_NUM_NOISE_VALUES; i++)
+      fData->res[i] = FREQ_RES_HIGH;
+  }
+
+
+  if (!clearOutput)
+  {
+    /*
+     * Transform audio data into QMF domain
+     */
+    for(ch = 0; ch < hSbrElement->sbrConfigData.nChannels; ch++)
+    {
+      HANDLE_ENV_CHANNEL h_envChan = &hSbrElement->sbrChannel[ch]->hEnvChannel;
+      HANDLE_SBR_EXTRACT_ENVELOPE sbrExtrEnv = &h_envChan->sbrExtractEnvelope;
+
+      if(hSbrElement->elInfo.fParametricStereo == 0)
+      {
+        C_ALLOC_SCRATCH_START(qmfWorkBuffer, FIXP_DBL, QMF_CHANNELS*2);
+        QMF_SCALE_FACTOR tmpScale;
+        FIXP_DBL **pQmfReal, **pQmfImag;
+
+
+        /* Obtain pointers to QMF buffers. */
+        pQmfReal = sbrExtrEnv->rBuffer+sbrExtrEnv->rBufferWriteOffset;
+        pQmfImag = sbrExtrEnv->iBuffer+sbrExtrEnv->rBufferWriteOffset;
+
+        qmfAnalysisFiltering( hSbrElement->hQmfAnalysis[ch],
+                               pQmfReal,
+                               pQmfImag,
+                              &tmpScale,
+                               samples + hSbrElement->elInfo.ChannelIndex[ch],
+                               timeInStride,
+                               qmfWorkBuffer );
+
+        C_ALLOC_SCRATCH_END(qmfWorkBuffer, FIXP_DBL, QMF_CHANNELS*2);
+
+        h_envChan->qmfScale = tmpScale.lb_scale + 7;
+
+      } /* fParametricStereo == 0 */
+
+
+      /*
+        Parametric Stereo processing
+      */
+      if(hSbrElement->elInfo.fParametricStereo)
+      {
+        int psCh;
+
+        /* Parametric Stereo QMF buffer preprocessing: copy previous qmf data down */
+        UpdatePSQmfData_second(hEnvEncoder->hParametricStereo);
+
+        for (psCh = 0; psCh<2; psCh ++)
+        {
+          C_ALLOC_SCRATCH_START(qmfWorkBuffer, FIXP_DBL, QMF_CHANNELS*2);
+          HANDLE_PS_QMF_DATA hPsQmfData =  hEnvEncoder->hParametricStereo->hPsChannelData[psCh]->hPsQmfData;
+          QMF_SCALE_FACTOR tmpScale;
+
+
+          qmfAnalysisFiltering(  hSbrElement->hQmfAnalysis[psCh],
+                                 hPsQmfData->rQmfData + hPsQmfData->bufferWriteOffset,
+                                 hPsQmfData->iQmfData + hPsQmfData->bufferWriteOffset,
+                                &tmpScale,
+                                 samples + hSbrElement->elInfo.ChannelIndex[psCh],
+                                 timeInStride,
+                                qmfWorkBuffer );
+
+          C_ALLOC_SCRATCH_END(qmfWorkBuffer, FIXP_DBL, QMF_CHANNELS*2);
+
+          hEnvEncoder->hParametricStereo->hPsChannelData[psCh]->psQmfScale = -tmpScale.lb_scale;
+        }
+
+
+        /* Limit Parametric Stereo to one instance */
+        FDK_ASSERT(ch == 0);
+
+
+        if(error == noError){
+          /* parametric stereo processing:
+             - input:
+               o left and right time domain samples
+             - processing:
+               o stereo qmf analysis
+               o stereo hybrid analysis
+               o ps parameter extraction
+               o downmix + hybrid synthesis
+             - output:
+               o downmixed qmf data is written to sbrExtrEnv->rBuffer and sbrExtrEnv->iBuffer
+          */
+          SCHAR qmfScale;
+          error = FDKsbrEnc_PSEnc_ParametricStereoProcessing( hEnvEncoder->hParametricStereo,
+                                                              sbrExtrEnv->rBuffer,
+                                                              sbrExtrEnv->iBuffer,
+                                                              sbrExtrEnv->rBufferWriteOffset,
+                                                              samples + hSbrElement->elInfo.ChannelIndex[ch],
+                                                             &hEnvEncoder->qmfSynthesisPS,
+                                                             &qmfScale,
+                                                              psHeaderActive );
+          if (noError != error)
+          {
+            error = handBack(error);
+          }
+          h_envChan->qmfScale = (int)qmfScale;
+        }
+
+
+      } /* if (hEnvEncoder->hParametricStereo) */
+
+      /*
+
+         Extract Envelope relevant things from QMF data
+
+      */
+      FDKsbrEnc_extractSbrEnvelope1(
+                                &hSbrElement->sbrConfigData,
+                                &hSbrElement->sbrHeaderData,
+                                &hSbrElement->sbrBitstreamData,
+                                 h_envChan,
+                                &hSbrElement->CmonData,
+                                &eData[ch],
+                                 fData
+                                 );
+
+    } /* hEnvEncoder->sbrConfigData.nChannels */
+ }
+
+  /*
+     Process Envelope relevant things and calculate envelope data and write payload
+  */
+  FDKsbrEnc_extractSbrEnvelope2(
+                                &hSbrElement->sbrConfigData,
+                                &hSbrElement->sbrHeaderData,
+                                (hSbrElement->elInfo.fParametricStereo) ? hEnvEncoder->hParametricStereo : NULL,
+                                &hSbrElement->sbrBitstreamData,
+                                &hSbrElement->sbrChannel[0]->hEnvChannel,
+                                &hSbrElement->sbrChannel[1]->hEnvChannel,
+                                &hSbrElement->CmonData,
+                                 eData,
+                                 fData,
+                                 clearOutput
+                               );
+
+  /*
+    format payload, calculate crc
+  */
+  FDKsbrEnc_AssembleSbrBitstream(&hSbrElement->CmonData, &crcInfo, crcReg, hSbrElement->sbrConfigData.sbrSyntaxFlags);
+
+  /*
+    save new payload, set to zero length if greater than MAX_PAYLOAD_SIZE
+  */
+  hSbrElement->payloadDelayLineSize[hEnvEncoder->nBitstrDelay] = FDKgetValidBits(&hSbrElement->CmonData.sbrBitbuf);
+
+  if(hSbrElement->payloadDelayLineSize[hEnvEncoder->nBitstrDelay] > (MAX_PAYLOAD_SIZE<<3))
+    hSbrElement->payloadDelayLineSize[hEnvEncoder->nBitstrDelay]=0;
+
+  /* While filling the Delay lines, sbrData is NULL */
+  if (sbrData) {
+    *sbrDataBits = hSbrElement->payloadDelayLineSize[0];
+    FDKmemcpy(sbrData, hSbrElement->payloadDelayLine[0], (hSbrElement->payloadDelayLineSize[0]+7)>>3);
+
+
+  }
+
+
+/*******************************/
+
+  if (hEnvEncoder->fTimeDomainDownsampling)
+  {
+    int ch;
+    int nChannels = hSbrElement->sbrConfigData.nChannels;
+
+    for (ch=0; ch < nChannels; ch++)
+    {
+      INT nOutSamples;
+
+      FDKaacEnc_Downsample(&hSbrElement->sbrChannel[ch]->downSampler,
+                            samples + hSbrElement->elInfo.ChannelIndex[ch] + hEnvEncoder->bufferOffset,
+                            hSbrElement->sbrConfigData.frameSize,
+                            timeInStride,
+                            samples + hSbrElement->elInfo.ChannelIndex[ch],
+                           &nOutSamples,
+                            hEnvEncoder->nChannels);
+    }
+  } /* downsample */
+
+
+  return (0);
+}
+
+/*****************************************************************************
+
+ functionname: createEnvChannel
+ description:  initializes parameters and allocates memory
+ returns:      error status
+ input:
+ output:       hEnv
+
+*****************************************************************************/
+
+static INT
+createEnvChannel (HANDLE_ENV_CHANNEL     hEnv,
+                  INT                    channel
+                 ,UCHAR*                 dynamic_RAM
+                 )
+{
+  FDKmemclear(hEnv,sizeof (struct ENV_CHANNEL));
+
+  if ( FDKsbrEnc_CreateTonCorrParamExtr(&hEnv->TonCorr,
+                                         channel) )
+  {
+    return(1);
+  }
+
+  if ( FDKsbrEnc_CreateExtractSbrEnvelope (&hEnv->sbrExtractEnvelope,
+                               channel
+                              ,/*chan*/0
+                              ,dynamic_RAM
+                              ) )
+  {
+    return(1);
+  }
+
+  return 0;
+}
+
+/*****************************************************************************
+
+ functionname: initEnvChannel
+ description:  initializes parameters
+ returns:      error status
+ input:
+ output:
+
+*****************************************************************************/
+static INT
+initEnvChannel (  HANDLE_SBR_CONFIG_DATA sbrConfigData,
+                  HANDLE_SBR_HEADER_DATA sbrHeaderData,
+                  HANDLE_ENV_CHANNEL     hEnv,
+                  sbrConfigurationPtr    params,
+                  ULONG                  statesInitFlag
+                 ,INT                    chanInEl
+                 ,UCHAR*                 dynamic_RAM
+                 )
+{
+  int frameShift, tran_off=0;
+  INT e;
+  INT tran_fc;
+  INT timeSlots, timeStep, startIndex;
+  INT noiseBands[2] = { 3, 3 };
+
+  e = 1 << params->e;
+
+  FDK_ASSERT(params->e >= 0);
+
+  hEnv->encEnvData.freq_res_fixfix = 1;
+  hEnv->fLevelProtect = 0;
+
+  hEnv->encEnvData.ldGrid = (sbrConfigData->sbrSyntaxFlags & SBR_SYNTAX_LOW_DELAY) ? 1 : 0;
+
+  hEnv->encEnvData.sbr_xpos_mode = (XPOS_MODE)params->sbr_xpos_mode;
+
+  if (hEnv->encEnvData.sbr_xpos_mode == XPOS_SWITCHED) {
+    /*
+       no other type than XPOS_MDCT or XPOS_SPEECH allowed,
+       but enable switching
+    */
+    sbrConfigData->switchTransposers = TRUE;
+    hEnv->encEnvData.sbr_xpos_mode = XPOS_MDCT;
+  }
+  else {
+    sbrConfigData->switchTransposers = FALSE;
+  }
+
+  hEnv->encEnvData.sbr_xpos_ctrl = params->sbr_xpos_ctrl;
+
+
+  /* extended data */
+  if(params->parametricCoding) {
+    hEnv->encEnvData.extended_data = 1;
+  }
+  else {
+    hEnv->encEnvData.extended_data = 0;
+  }
+
+  hEnv->encEnvData.extension_size = 0;
+
+  startIndex = QMF_FILTER_PROTOTYPE_SIZE - sbrConfigData->noQmfBands;
+
+  switch (params->sbrFrameSize) {
+  case 2304:
+    timeSlots = 18;
+    break;
+  case 2048:
+  case 1024:
+    timeSlots = 16;
+    break;
+  case 1920:
+  case 960:
+    timeSlots = 15;
+    break;
+  case 1152:
+    timeSlots = 9;
+    break;
+  default:
+    return (1); /* Illegal frame size */
+  }
+
+  timeStep = sbrConfigData->noQmfSlots / timeSlots;
+
+  if ( FDKsbrEnc_InitTonCorrParamExtr(params->sbrFrameSize,
+                                     &hEnv->TonCorr,
+                                      sbrConfigData,
+                                      timeSlots,
+                                      params->sbr_xpos_ctrl,
+                                      params->ana_max_level,
+                                      sbrHeaderData->sbr_noise_bands,
+                                      params->noiseFloorOffset,
+                                      params->useSpeechConfig) )
+    return(1);
+
+  hEnv->encEnvData.noOfnoisebands = hEnv->TonCorr.sbrNoiseFloorEstimate.noNoiseBands;
+
+  noiseBands[0] = hEnv->encEnvData.noOfnoisebands;
+  noiseBands[1] = hEnv->encEnvData.noOfnoisebands;
+
+  hEnv->encEnvData.sbr_invf_mode = (INVF_MODE)params->sbr_invf_mode;
+
+  if (hEnv->encEnvData.sbr_invf_mode == INVF_SWITCHED) {
+    hEnv->encEnvData.sbr_invf_mode = INVF_MID_LEVEL;
+    hEnv->TonCorr.switchInverseFilt = TRUE;
+  }
+  else {
+    hEnv->TonCorr.switchInverseFilt = FALSE;
+  }
+
+
+  tran_fc  = params->tran_fc;
+
+  if (tran_fc == 0)
+    tran_fc = fixMin (5000, FDKsbrEnc_getSbrStartFreqRAW (sbrHeaderData->sbr_start_frequency,64,sbrConfigData->sampleFreq));
+
+
+  tran_fc = (tran_fc*4*sbrConfigData->noQmfBands/sbrConfigData->sampleFreq + 1)>>1;
+
+  if (sbrConfigData->sbrSyntaxFlags & SBR_SYNTAX_LOW_DELAY) {
+    frameShift = LD_PRETRAN_OFF;
+    tran_off = LD_PRETRAN_OFF + FRAME_MIDDLE_SLOT_512LD*timeStep;
+  } else
+  {
+    frameShift = 0;
+    switch (params->sbrFrameSize) {
+      /* The factor of 2 is by definition. */
+      case 2048: tran_off = 8 + FRAME_MIDDLE_SLOT_2048 * timeStep; break;
+      case 1920: tran_off = 7 + FRAME_MIDDLE_SLOT_1920 * timeStep; break;
+      default: return 1; break;
+    }
+  }
+  if ( FDKsbrEnc_InitExtractSbrEnvelope (&hEnv->sbrExtractEnvelope,
+                               sbrConfigData->noQmfSlots,
+                               sbrConfigData->noQmfBands, startIndex,
+                               timeSlots, timeStep, tran_off,
+                               statesInitFlag
+                              ,chanInEl
+                              ,dynamic_RAM
+                              ,sbrConfigData->sbrSyntaxFlags
+                               ) )
+    return(1);
+
+  if(FDKsbrEnc_InitSbrCodeEnvelope (&hEnv->sbrCodeEnvelope,
+                            sbrConfigData->nSfb,
+                            params->deltaTAcrossFrames,
+                            params->dF_edge_1stEnv,
+                            params->dF_edge_incr))
+    return(1);
+
+  if(FDKsbrEnc_InitSbrCodeEnvelope (&hEnv->sbrCodeNoiseFloor,
+                            noiseBands,
+                            params->deltaTAcrossFrames,
+                            0,0))
+    return(1);
+
+  sbrConfigData->initAmpResFF = params->init_amp_res_FF;
+
+  if(FDKsbrEnc_InitSbrHuffmanTables (&hEnv->encEnvData,
+                           &hEnv->sbrCodeEnvelope,
+                           &hEnv->sbrCodeNoiseFloor,
+                           sbrHeaderData->sbr_amp_res))
+   return(1);
+
+  FDKsbrEnc_initFrameInfoGenerator (&hEnv->SbrEnvFrame,
+                            params->spread,
+                            e,
+                            params->stat,
+                            timeSlots,
+                            hEnv->encEnvData.freq_res_fixfix
+                            ,hEnv->encEnvData.ldGrid
+                            );
+
+  if(FDKsbrEnc_InitSbrTransientDetector (&hEnv->sbrTransientDetector,
+                                          sbrConfigData->frameSize,
+                                          sbrConfigData->sampleFreq,
+                                          params,
+                                          tran_fc,
+                                          sbrConfigData->noQmfSlots,
+                                          sbrConfigData->noQmfBands,
+                                          hEnv->sbrExtractEnvelope.YBufferWriteOffset,
+                                          hEnv->sbrExtractEnvelope.YBufferSzShift,
+                                          frameShift,
+                                          tran_off
+                                          ))
+  return(1);
+
+
+  sbrConfigData->xposCtrlSwitch = params->sbr_xpos_ctrl;
+
+  hEnv->encEnvData.noHarmonics = sbrConfigData->nSfb[HI];
+  hEnv->encEnvData.addHarmonicFlag = 0;
+
+  return (0);
+}
+
+INT sbrEncoder_Open(
+        HANDLE_SBR_ENCODER  *phSbrEncoder,
+        INT                  nElements,
+        INT                  nChannels,
+        INT                  supportPS
+        )
+{
+  INT i;
+  INT errorStatus = 1;
+  HANDLE_SBR_ENCODER hSbrEncoder = NULL;
+
+  if (phSbrEncoder==NULL
+     )
+  {
+    goto bail;
+  }
+
+  hSbrEncoder = GetRam_SbrEncoder();
+  if (hSbrEncoder==NULL) {
+    goto bail;
+  }
+  FDKmemclear(hSbrEncoder, sizeof(SBR_ENCODER));
+
+      hSbrEncoder->pSBRdynamic_RAM = (UCHAR*)GetRam_SbrDynamic_RAM();
+      hSbrEncoder->dynamicRam = hSbrEncoder->pSBRdynamic_RAM;
+
+
+  for (i=0; i<nElements; i++) {
+    hSbrEncoder->sbrElement[i] = GetRam_SbrElement(i);
+    if (hSbrEncoder->sbrElement[i]==NULL) {
+        goto bail;
+    }
+    FDKmemclear(hSbrEncoder->sbrElement[i], sizeof(SBR_ELEMENT));
+    hSbrEncoder->sbrElement[i]->sbrConfigData.freqBandTable[LO] =  GetRam_Sbr_freqBandTableLO(i);
+    hSbrEncoder->sbrElement[i]->sbrConfigData.freqBandTable[HI] =  GetRam_Sbr_freqBandTableHI(i);
+    hSbrEncoder->sbrElement[i]->sbrConfigData.v_k_master        =  GetRam_Sbr_v_k_master(i);
+    if ( (hSbrEncoder->sbrElement[i]->sbrConfigData.freqBandTable[LO]==NULL) ||
+         (hSbrEncoder->sbrElement[i]->sbrConfigData.freqBandTable[HI]==NULL) ||
+         (hSbrEncoder->sbrElement[i]->sbrConfigData.v_k_master==NULL) )
+    {
+        goto bail;
+    }
+  }
+
+  for (i=0; i<nChannels; i++) {
+    hSbrEncoder->pSbrChannel[i] = GetRam_SbrChannel(i);
+    if (hSbrEncoder->pSbrChannel[i]==NULL) {
+        goto bail;
+    }
+
+    if ( createEnvChannel(&hSbrEncoder->pSbrChannel[i]->hEnvChannel,
+                           i
+                          ,hSbrEncoder->dynamicRam
+                           ) )
+    {
+        goto bail;
+    }
+
+  }
+
+  for (i=0; i<fixMax(nChannels,(supportPS)?2:0); i++) {
+    hSbrEncoder->QmfAnalysis[i].FilterStates = GetRam_Sbr_QmfStatesAnalysis(i);
+    if (hSbrEncoder->QmfAnalysis[i].FilterStates==NULL) {
+        goto bail;
+    }
+  }
+
+  if (supportPS) {
+    hSbrEncoder->hPsEncConfig = GetRam_PsEncConf();
+    if (hSbrEncoder->hPsEncConfig==NULL) {
+      goto bail;
+    }
+
+    if (PSEnc_Create(&hSbrEncoder->hParametricStereo))
+    {
+      goto bail;
+    }
+
+    hSbrEncoder->qmfSynthesisPS.FilterStates = GetRam_PsQmfStatesSynthesis();
+    if (hSbrEncoder->qmfSynthesisPS.FilterStates==NULL) {
+      goto bail;
+    }
+  }  /* supportPS */
+
+  *phSbrEncoder = hSbrEncoder;
+
+  errorStatus = 0;
+  return errorStatus;
+
+bail:
+  /* Close SBR encoder instance */
+  sbrEncoder_Close(&hSbrEncoder);
+  return errorStatus;
+}
+
+static
+INT FDKsbrEnc_Reallocate(
+                    HANDLE_SBR_ENCODER   hSbrEncoder,
+                    SBR_ELEMENT_INFO     elInfo[(6)],
+                    const INT            noElements)
+{
+  INT totalCh = 0;
+  INT totalQmf = 0;
+  INT coreEl;
+  INT el=-1;
+
+  hSbrEncoder->lfeChIdx = -1; /* default value, until lfe found */
+
+  for (coreEl=0; coreEl<noElements; coreEl++)
+  {
+    /* SBR only handles SCE and CPE's */
+    if (elInfo[coreEl].elType == ID_SCE || elInfo[coreEl].elType == ID_CPE) {
+      el++;
+    } else {
+      if (elInfo[coreEl].elType == ID_LFE) {
+          hSbrEncoder->lfeChIdx = elInfo[coreEl].ChannelIndex[0];
+      }
+      continue;
+    }
+
+    SBR_ELEMENT_INFO    *pelInfo = &elInfo[coreEl];
+    HANDLE_SBR_ELEMENT  hSbrElement = hSbrEncoder->sbrElement[el];
+
+    int ch;
+    for ( ch = 0; ch < pelInfo->nChannelsInEl; ch++ ) {
+      hSbrElement->sbrChannel[ch] = hSbrEncoder->pSbrChannel[totalCh];
+      totalCh++;
+    }
+    /* analysis QMF */
+    for ( ch = 0; ch < ((pelInfo->fParametricStereo)?2:pelInfo->nChannelsInEl); ch++ ) {
+      hSbrElement->elInfo.ChannelIndex[ch] = pelInfo->ChannelIndex[ch];
+      hSbrElement->hQmfAnalysis[ch] = &hSbrEncoder->QmfAnalysis[totalQmf++];
+    }
+
+    /* Copy Element info */
+    hSbrElement->elInfo.elType            = pelInfo->elType;
+    hSbrElement->elInfo.instanceTag       = pelInfo->instanceTag;
+    hSbrElement->elInfo.nChannelsInEl     = pelInfo->nChannelsInEl;
+    hSbrElement->elInfo.fParametricStereo = pelInfo->fParametricStereo;
+  } /* coreEl */
+
+  return 0;
+}
+
+
+
+/*****************************************************************************
+
+ functionname: FDKsbrEnc_EnvInit
+ description:  initializes parameters
+ returns:      error status
+ input:
+ output:       hEnv
+
+*****************************************************************************/
+static
+INT FDKsbrEnc_EnvInit (
+                       HANDLE_SBR_ELEMENT   hSbrElement,
+                       sbrConfigurationPtr params,
+                       INT      *coreBandWith,
+                       AUDIO_OBJECT_TYPE aot,
+                       int       nBitstrDelay,
+                       int       nElement,
+                       ULONG     statesInitFlag
+                      ,UCHAR    *dynamic_RAM
+                      )
+{
+  UCHAR    *bitstreamBuffer;
+  int ch, i;
+
+  if ((params->codecSettings.nChannels < 1) || (params->codecSettings.nChannels > MAX_NUM_CHANNELS)){
+    return(1);
+  }
+
+  /* initialize the encoder handle  and structs*/
+  bitstreamBuffer = hSbrElement->payloadDelayLine[nBitstrDelay];
+
+  /* init and set syntax flags */
+  hSbrElement->sbrConfigData.sbrSyntaxFlags = 0;
+
+  switch (aot) {
+  case AOT_DRM_MPEG_PS:
+  case AOT_DRM_SBR:
+    hSbrElement->sbrConfigData.sbrSyntaxFlags |= SBR_SYNTAX_SCALABLE;
+    hSbrElement->sbrConfigData.sbrSyntaxFlags |= SBR_SYNTAX_DRM_CRC;
+    hSbrElement->sbrConfigData.sbrSyntaxFlags |= SBR_SYNTAX_CRC;
+    break;
+  case AOT_ER_AAC_ELD:
+    hSbrElement->sbrConfigData.sbrSyntaxFlags |= SBR_SYNTAX_LOW_DELAY;
+    break;
+  default:
+    break;
+  }
+  if (params->crcSbr) {
+    hSbrElement->sbrConfigData.sbrSyntaxFlags |= SBR_SYNTAX_CRC;
+  }
+
+  hSbrElement->sbrConfigData.noQmfBands = QMF_CHANNELS;
+  hSbrElement->sbrConfigData.noQmfSlots = params->sbrFrameSize/hSbrElement->sbrConfigData.noQmfBands;
+
+  FDKinitBitStream(&hSbrElement->CmonData.sbrBitbuf, bitstreamBuffer, MAX_PAYLOAD_SIZE*sizeof(UCHAR), 0, BS_WRITER);
+
+  /*
+    now initialize sbrConfigData, sbrHeaderData and sbrBitstreamData,
+  */
+  hSbrElement->sbrConfigData.nChannels = params->codecSettings.nChannels;
+
+  if(params->codecSettings.nChannels == 2)
+     hSbrElement->sbrConfigData.stereoMode = params->stereoMode;
+  else
+     hSbrElement->sbrConfigData.stereoMode = SBR_MONO;
+
+  hSbrElement->sbrConfigData.frameSize   = params->sbrFrameSize;
+
+  /* implicit rule for sampleRateMode */
+  /* run in "multirate" mode where sbr fs is 2 * codec fs */
+  hSbrElement->sbrHeaderData.sampleRateMode = DUAL_RATE;
+  hSbrElement->sbrConfigData.sampleFreq = 2 * params->codecSettings.sampleFreq;
+
+  hSbrElement->sbrBitstreamData.CountSendHeaderData = 0;
+  if (params->SendHeaderDataTime > 0 ) {
+
+    hSbrElement->sbrBitstreamData.NrSendHeaderData = (INT)(params->SendHeaderDataTime * hSbrElement->sbrConfigData.sampleFreq
+                                               / (1000 * hSbrElement->sbrConfigData.frameSize));
+    hSbrElement->sbrBitstreamData.NrSendHeaderData = fixMax(hSbrElement->sbrBitstreamData.NrSendHeaderData,1);
+  }
+  else {
+   hSbrElement->sbrBitstreamData.NrSendHeaderData = 0;
+  }
+
+  hSbrElement->sbrHeaderData.sbr_data_extra = params->sbr_data_extra;
+  hSbrElement->sbrBitstreamData.HeaderActive = 0;
+  hSbrElement->sbrHeaderData.sbr_start_frequency = params->startFreq;
+  hSbrElement->sbrHeaderData.sbr_stop_frequency  = params->stopFreq;
+  hSbrElement->sbrHeaderData.sbr_xover_band = 0;
+  hSbrElement->sbrHeaderData.sbr_lc_stereo_mode = 0;
+
+  /* data_extra */
+  if (params->sbr_xpos_ctrl!= SBR_XPOS_CTRL_DEFAULT)
+     hSbrElement->sbrHeaderData.sbr_data_extra = 1;
+
+  hSbrElement->sbrHeaderData.sbr_amp_res = (AMP_RES)params->amp_res;
+
+  /* header_extra_1 */
+  hSbrElement->sbrHeaderData.freqScale  = params->freqScale;
+  hSbrElement->sbrHeaderData.alterScale = params->alterScale;
+  hSbrElement->sbrHeaderData.sbr_noise_bands = params->sbr_noise_bands;
+  hSbrElement->sbrHeaderData.header_extra_1 = 0;
+
+  if ((params->freqScale != SBR_FREQ_SCALE_DEFAULT) ||
+      (params->alterScale != SBR_ALTER_SCALE_DEFAULT) ||
+      (params->sbr_noise_bands != SBR_NOISE_BANDS_DEFAULT))
+  {
+   hSbrElement->sbrHeaderData.header_extra_1 = 1;
+  }
+
+  /* header_extra_2 */
+  hSbrElement->sbrHeaderData.sbr_limiter_bands = params->sbr_limiter_bands;
+  hSbrElement->sbrHeaderData.sbr_limiter_gains = params->sbr_limiter_gains;
+
+  if ((hSbrElement->sbrConfigData.sampleFreq > 48000) &&
+      (hSbrElement->sbrHeaderData.sbr_start_frequency >= 9))
+  {
+    hSbrElement->sbrHeaderData.sbr_limiter_gains = SBR_LIMITER_GAINS_INFINITE;
+  }
+
+  hSbrElement->sbrHeaderData.sbr_interpol_freq = params->sbr_interpol_freq;
+  hSbrElement->sbrHeaderData.sbr_smoothing_length = params->sbr_smoothing_length;
+  hSbrElement->sbrHeaderData.header_extra_2 = 0;
+
+  if ((params->sbr_limiter_bands != SBR_LIMITER_BANDS_DEFAULT) ||
+      (params->sbr_limiter_gains != SBR_LIMITER_GAINS_DEFAULT) ||
+      (params->sbr_interpol_freq != SBR_INTERPOL_FREQ_DEFAULT) ||
+      (params->sbr_smoothing_length != SBR_SMOOTHING_LENGTH_DEFAULT))
+  {
+     hSbrElement->sbrHeaderData.header_extra_2 = 1;
+  }
+
+   /* other switches */
+  hSbrElement->sbrConfigData.useWaveCoding             = params->useWaveCoding;
+  hSbrElement->sbrConfigData.useParametricCoding       = params->parametricCoding;
+
+  /* init freq band table */
+  if(updateFreqBandTable(&hSbrElement->sbrConfigData,
+                         &hSbrElement->sbrHeaderData,
+                         hSbrElement->sbrConfigData.noQmfBands))
+  {
+    return(1);
+  }
+
+  /* now create envelope ext and QMF for each available channel */
+  for ( ch = 0; ch < hSbrElement->sbrConfigData.nChannels; ch++ ) {
+
+     if ( initEnvChannel(&hSbrElement->sbrConfigData,
+                         &hSbrElement->sbrHeaderData,
+                         &hSbrElement->sbrChannel[ch]->hEnvChannel,
+                          params,
+                          statesInitFlag
+                        ,ch
+                        ,dynamic_RAM
+                         ) )
+     {
+       return(1);
+     }
+
+
+  } /* nChannels */
+
+  /* reset and intialize analysis qmf */
+  for ( ch = 0; ch < ((hSbrElement->elInfo.fParametricStereo)?2:hSbrElement->sbrConfigData.nChannels); ch++ )
+  {
+    int err;
+    UINT qmfFlags = (hSbrElement->sbrConfigData.sbrSyntaxFlags & SBR_SYNTAX_LOW_DELAY) ? QMF_FLAG_CLDFB : 0;
+    if (statesInitFlag)
+      qmfFlags &= ~QMF_FLAG_KEEP_STATES;
+    else
+      qmfFlags |=  QMF_FLAG_KEEP_STATES;
+
+    err = qmfInitAnalysisFilterBank( hSbrElement->hQmfAnalysis[ch],
+                                     (FIXP_QAS*)hSbrElement->hQmfAnalysis[ch]->FilterStates,
+                                     hSbrElement->sbrConfigData.noQmfSlots,
+                                     hSbrElement->sbrConfigData.noQmfBands,
+                                     hSbrElement->sbrConfigData.noQmfBands,
+                                     hSbrElement->sbrConfigData.noQmfBands,
+                                     qmfFlags );
+  }
+
+  /*  */
+  hSbrElement->CmonData.xOverFreq = hSbrElement->sbrConfigData.xOverFreq;
+  hSbrElement->CmonData.dynBwEnabled = (params->dynBwSupported && params->dynBwEnabled);
+  hSbrElement->CmonData.dynXOverFreqEnc = FDKsbrEnc_SbrGetXOverFreq( hSbrElement, hSbrElement->CmonData.xOverFreq);
+  for ( i = 0; i < 5; i++ )
+      hSbrElement->dynXOverFreqDelay[i] = hSbrElement->CmonData.dynXOverFreqEnc;
+  hSbrElement->CmonData.sbrNumChannels  = hSbrElement->sbrConfigData.nChannels;
+  hSbrElement->sbrConfigData.dynXOverFreq = hSbrElement->CmonData.xOverFreq;
+
+  /* Update Bandwith to be passed to the core encoder */
+  *coreBandWith = hSbrElement->CmonData.xOverFreq;
+
+  return(0);
+ }
+
+INT sbrEncoder_GetInBufferSize(int noChannels)
+{
+  INT temp;
+
+  temp = (1024*DOWN_SMPL_FAC);
+  temp += 1024 + MAX_SAMPLE_DELAY;
+  temp *= noChannels;
+  temp *= sizeof(INT_PCM);
+  return temp;
+}
+
+/*
+ * Encode Dummy SBR payload frames to fill the delay lines.
+ */
+static
+INT FDKsbrEnc_DelayCompensation (
+                                  HANDLE_SBR_ENCODER hEnvEnc,
+                                  INT_PCM *timeBuffer
+                                 )
+{
+    int n, el;
+
+    for (n=hEnvEnc->nBitstrDelay; n>0; n--)
+    {
+      for (el=0; el<hEnvEnc->noElements; el++)
+      {
+        if (FDKsbrEnc_EnvEncodeFrame(
+                                     hEnvEnc,
+                                     el,
+                                     timeBuffer + hEnvEnc->downsampledOffset,
+                                     hEnvEnc->sbrElement[el]->sbrConfigData.nChannels,
+                                     NULL,
+                                     NULL,
+                                     1
+                                    ))
+          return -1;
+          sbrEncoder_UpdateBuffers(hEnvEnc, timeBuffer);
+      }
+    }
+	  return 0;
+}
+
+
+INT sbrEncoder_Init(
+                     HANDLE_SBR_ENCODER hSbrEncoder,
+                     SBR_ELEMENT_INFO elInfo[(6)],
+                     int              noElements,
+                     INT_PCM *inputBuffer,
+                     INT   *coreBandwidth,
+                     INT   *inputBufferOffset,
+                     INT   *numChannels,
+                     INT   *sampleRate,
+                     INT   *frameLength,
+                     AUDIO_OBJECT_TYPE *aot,
+                     int *delay,
+                     int  transformFactor,
+                     ULONG  statesInitFlag
+                    )
+{
+    HANDLE_ERROR_INFO errorInfo = noError;
+    sbrConfiguration sbrConfig[(6)];
+    INT error = 0;
+    INT lowestBandwidth;
+    /* Save input parameters */
+    INT inputSampleRate = *sampleRate;
+    int coreFrameLength = *frameLength;
+    int inputBandWidth = *coreBandwidth;
+    int inputChannels = *numChannels;
+
+    int downsampledOffset = 0;
+    int sbrOffset = 0;
+    int downsamplerDelay = 0;
+    int downsample = 0;
+    int nBitstrDelay = 0;
+    int lowestSbrStartFreq, lowestSbrStopFreq;
+    int lowDelay = 0;
+    int usePs = 0;
+
+    /* check whether SBR setting is available for the current encoder configuration (bitrate, samplerate) */
+    if ( (*aot==AOT_PS) || (*aot==AOT_MP2_PS) || (*aot==AOT_DABPLUS_PS) || (*aot==AOT_DRM_MPEG_PS) ) {
+        usePs = 1;
+    }
+    if ( (*aot==AOT_ER_AAC_ELD) ) {
+        lowDelay = 1;
+    }
+    else if ( (*aot==AOT_ER_AAC_LD) ) {
+        error = 1;
+        goto bail;
+    }
+
+    /* Parametric Stereo */
+    if ( usePs ) {
+      if ( *numChannels == 2 && noElements == 1) {
+        /* Override Element type in case of Parametric stereo */
+        elInfo[0].elType = ID_SCE;
+        elInfo[0].fParametricStereo = 1;
+        elInfo[0].nChannelsInEl = 1;
+        /* core encoder gets downmixed mono signal */
+        *numChannels  = 1;
+      } else {
+        switch (*aot) {
+          case AOT_MP2_PS:
+            *aot = AOT_MP2_SBR;
+            break;
+          case AOT_DABPLUS_PS:
+            *aot = AOT_DABPLUS_SBR;
+            break;
+          case AOT_DRM_MPEG_PS:
+            *aot = AOT_DRM_SBR;
+            break;
+          case AOT_PS:
+          default:
+            *aot = AOT_SBR;
+        }
+        usePs = 0;
+      }
+    } /* usePs */
+
+    /* check whether SBR setting is available for the current encoder configuration (bitrate, samplerate) */
+    {
+      int delayDiff = 0;
+      int el, coreEl;
+
+      /* Check if every element config is feasible */
+      for (coreEl=0; coreEl<noElements; coreEl++)
+      {
+        /* SBR only handles SCE and CPE's */
+        if (elInfo[coreEl].elType != ID_SCE && elInfo[coreEl].elType != ID_CPE) {
+          continue;
+        }
+        /* check if desired configuration is available */
+        if ( !FDKsbrEnc_IsSbrSettingAvail (elInfo[coreEl].bitRate, 0, elInfo[coreEl].nChannelsInEl, inputSampleRate, *aot) )
+        {
+            /* otherwise - change to AAC-LC */
+            switch (*aot) {
+              case AOT_MP2_SBR:
+              case AOT_MP2_PS:
+                *aot = AOT_MP2_AAC_LC;
+                break;
+              case AOT_DABPLUS_SBR:
+              case AOT_DABPLUS_PS:
+                *aot = AOT_DABPLUS_AAC_LC;
+                break;
+              case AOT_DRM_SBR:
+              case AOT_DRM_MPEG_PS:
+                *aot = AOT_DRM_AAC;
+                break;
+              case AOT_ER_AAC_ELD:
+                break;
+              case AOT_SBR:
+              case AOT_PS:
+              default:
+                *aot = AOT_AAC_LC;
+            }
+            error = 1;
+            goto bail;
+        }
+      }
+
+      *sampleRate /= DOWN_SMPL_FAC;
+
+      /* Determine Delay balancing and new encoder delay */
+      if (lowDelay) {
+        downsample = 1;  /* activate downsampler */
+        delayDiff = (*delay*DOWN_SMPL_FAC) + DELAY_ELD2SBR(coreFrameLength);
+        *delay = DELAY_ELDSBR(coreFrameLength);
+      }
+      else if (usePs) {
+        delayDiff = (*delay*DOWN_SMPL_FAC) + DELAY_AAC2PS(coreFrameLength);
+        *delay = DELAY_PS(coreFrameLength);
+      }
+      else {
+        downsample = 1;  /* activate downsampler */
+        delayDiff = (*delay*DOWN_SMPL_FAC) + DELAY_AAC2SBR(coreFrameLength);
+        *delay = DELAY_SBR(coreFrameLength);
+      }
+
+      /* Take care about downsampled data bound to the SBR path */
+      if (!downsample && delayDiff > 0) {
+        /*
+         * We must tweak the balancing into a situation where the downsampled path
+         * is the one to be delayed, because delaying the QMF domain input, also delays
+         * the downsampled audio, counteracting to the purpose of delay balancing.
+         */
+        while ( delayDiff > 0 )
+        {
+          /* Encoder delay increases */
+          *delay += coreFrameLength*DOWN_SMPL_FAC;
+          /* Add one frame delay to SBR path */
+          delayDiff -= coreFrameLength*DOWN_SMPL_FAC;
+          nBitstrDelay += 1;
+        }
+      } else {
+        *delay += fixp_abs(delayDiff);
+      }
+
+      if (delayDiff < 0) {
+        /* Delay AAC data */
+        delayDiff = -delayDiff;
+        /* Multiply downsampled offset by AAC core channels. Divide by 2 because of half samplerate of downsampled data. */
+        downsampledOffset = (delayDiff*(*numChannels))/DOWN_SMPL_FAC;
+        sbrOffset = 0;
+      } else {
+        /* Delay SBR input */
+        if ( delayDiff > (int)coreFrameLength*DOWN_SMPL_FAC )
+        {
+          /* Do bitstream frame-wise delay balancing if we have more than SBR framelength samples delay difference */
+          delayDiff -= coreFrameLength*DOWN_SMPL_FAC;
+          nBitstrDelay = 1;
+        }
+        /* Multiply input offset by input channels */
+        sbrOffset = delayDiff*(*numChannels);
+        downsampledOffset = 0;
+      }
+
+      hSbrEncoder->nBitstrDelay = nBitstrDelay;
+      hSbrEncoder->nChannels = *numChannels;
+      hSbrEncoder->frameSize = *frameLength*DOWN_SMPL_FAC;
+      hSbrEncoder->fTimeDomainDownsampling = downsample;
+      hSbrEncoder->estimateBitrate = 0;
+      hSbrEncoder->inputDataDelay = 0;
+
+
+      /* Open SBR elements */
+      el = -1;
+      lowestSbrStartFreq = lowestSbrStopFreq = 9999;
+      lowestBandwidth = 99999;
+
+      /* Loop through each core encoder element and get a matching SBR element config */
+      for (coreEl=0; coreEl<noElements; coreEl++)
+      {
+        /* SBR only handles SCE and CPE's */
+        if (elInfo[coreEl].elType == ID_SCE || elInfo[coreEl].elType == ID_CPE) {
+          el++;
+        } else {
+          continue;
+        }
+
+        /* Set parametric Stereo Flag. */
+        if (usePs) {
+          elInfo[coreEl].fParametricStereo = 1;
+        } else {
+          elInfo[coreEl].fParametricStereo = 0;
+        }
+
+        /*
+         * Init sbrConfig structure
+         */
+        FDKsbrEnc_InitializeSbrDefaults ( &sbrConfig[el],
+                                           DOWN_SMPL_FAC,
+                                           coreFrameLength);
+        /*
+         * Modify sbrConfig structure according to Element parameters
+         */
+        FDKsbrEnc_AdjustSbrSettings ( &sbrConfig[el],
+                                       elInfo[coreEl].bitRate,
+                                       elInfo[coreEl].nChannelsInEl,
+                                      *sampleRate,
+                                       transformFactor,
+                                       24000,
+                                       0,
+                                       0,                                            /* useSpeechConfig */
+                                       0,                                            /* lcsMode */
+                                       usePs, /* bParametricStereo */
+                                       *aot);
+
+        /* Find common frequency border for all SBR elements */
+        lowestSbrStartFreq = fixMin(lowestSbrStartFreq, sbrConfig[el].startFreq);
+        lowestSbrStopFreq = fixMin(lowestSbrStopFreq, sbrConfig[el].stopFreq);
+
+
+      } /* first element loop */
+
+      /* Set element count (can be less than core encoder element count) */
+      hSbrEncoder->noElements = el+1;
+
+      FDKsbrEnc_Reallocate(hSbrEncoder,
+                           elInfo,
+                           noElements);
+
+      for (el=0; el<hSbrEncoder->noElements; el++) {
+
+        int bandwidth = *coreBandwidth;
+
+        /* Use lowest common bandwidth */
+        sbrConfig[el].startFreq = lowestSbrStartFreq;
+        sbrConfig[el].stopFreq = lowestSbrStopFreq;
+
+        /* initialize SBR element, and get core bandwidth */
+        error = FDKsbrEnc_EnvInit(hSbrEncoder->sbrElement[el],
+                                  &sbrConfig[el],
+                                  &bandwidth,
+                                  *aot,
+                                   nBitstrDelay,
+                                   el,
+                                   statesInitFlag
+                                  ,hSbrEncoder->dynamicRam
+                                  );
+
+        if (error != 0) {
+          goto bail;
+        }
+
+        /* Get lowest core encoder bandwidth to be returned later. */
+        lowestBandwidth = fixMin(lowestBandwidth, bandwidth);
+
+      } /* second element loop */
+
+      /* Initialize a downsampler for each channel in each SBR element */
+      if (hSbrEncoder->fTimeDomainDownsampling)
+      {
+        for (el=0; el<hSbrEncoder->noElements; el++)
+        {
+          HANDLE_SBR_ELEMENT hSbrEl = hSbrEncoder->sbrElement[el];
+          INT Wc, ch;
+
+          /* Calculated required normalized cutoff frequency (Wc = 1.0 -> lowestBandwidth = inputSampleRate/2) */
+          Wc = (2*lowestBandwidth)*1000 / inputSampleRate;
+
+          for (ch=0; ch<hSbrEl->elInfo.nChannelsInEl; ch++)
+          {
+            FDKaacEnc_InitDownsampler (&hSbrEl->sbrChannel[ch]->downSampler, Wc, DOWN_SMPL_FAC);
+          }
+
+          FDK_ASSERT (hSbrEl->sbrChannel[0]->downSampler.delay <=MAX_DS_FILTER_DELAY && hSbrEl->sbrChannel[0]->downSampler.delay <=MAX_DS_FILTER_DELAY);
+          downsamplerDelay = hSbrEl->sbrChannel[0]->downSampler.delay;
+        } /* third element loop */
+
+        /* lfe */
+        FDKaacEnc_InitDownsampler (&hSbrEncoder->lfeDownSampler, 0, DOWN_SMPL_FAC);
+
+        /* Add the resampler additional delay to get the final delay and buffer offset values. */
+        if (sbrOffset > 0 || downsampledOffset <= ((downsamplerDelay * (*numChannels))/DOWN_SMPL_FAC)) {
+          sbrOffset += (downsamplerDelay - downsampledOffset) * (*numChannels) ;
+          *delay += downsamplerDelay - downsampledOffset;
+          downsampledOffset = 0;
+        } else {
+          downsampledOffset -= (downsamplerDelay * (*numChannels))/DOWN_SMPL_FAC;
+          sbrOffset = 0;
+        }
+
+        hSbrEncoder->inputDataDelay = downsamplerDelay;
+      }
+
+
+      /* Assign core encoder Bandwidth */
+      *coreBandwidth = lowestBandwidth;
+
+      /* Estimate sbr bitrate, 2.5 kBit/s per sbr channel */
+      hSbrEncoder->estimateBitrate += 2500 * (*numChannels);
+
+      /* initialize parametric stereo */
+      if (usePs)
+      {
+        FDK_ASSERT(hSbrEncoder->noElements == 1);
+        INT psTuningTableIdx = getPsTuningTableIndex(elInfo[0].bitRate); //sbrConfig.codecSettings.bitRate);
+
+        hSbrEncoder->hPsEncConfig->frameSize           = *frameLength; //sbrConfig.sbrFrameSize;
+        hSbrEncoder->hPsEncConfig->qmfFilterMode       = 0;
+        hSbrEncoder->hPsEncConfig->sbrPsDelay          = 0;
+
+        /* tuning parameters */
+        if (psTuningTableIdx  != INVALID_TABLE_IDX) {
+          hSbrEncoder->hPsEncConfig->nStereoBands           = psTuningTable[psTuningTableIdx].nStereoBands;
+          hSbrEncoder->hPsEncConfig->maxEnvelopes           = psTuningTable[psTuningTableIdx].nEnvelopes;
+          hSbrEncoder->hPsEncConfig->iidQuantErrorThreshold = (FIXP_DBL)psTuningTable[psTuningTableIdx].iidQuantErrorThreshold;
+
+          /* calculation is not quite linear, increased number of envelopes causes more bits */
+          /* assume avg. 50 bits per frame for 10 stereo bands / 1 envelope configuration */
+          hSbrEncoder->estimateBitrate += ( (((*sampleRate) * 5 * hSbrEncoder->hPsEncConfig->nStereoBands * hSbrEncoder->hPsEncConfig->maxEnvelopes) / hSbrEncoder->frameSize));
+
+        } else {
+          error = ERROR(CDI, "Invalid ps tuning table index.");
+          goto bail;
+        }
+
+        qmfInitSynthesisFilterBank(&hSbrEncoder->qmfSynthesisPS,
+                                    (FIXP_DBL*)hSbrEncoder->qmfSynthesisPS.FilterStates,
+                                    hSbrEncoder->sbrElement[0]->sbrConfigData.noQmfSlots,
+                                    hSbrEncoder->sbrElement[0]->sbrConfigData.noQmfBands>>1,
+                                    hSbrEncoder->sbrElement[0]->sbrConfigData.noQmfBands>>1,
+                                    hSbrEncoder->sbrElement[0]->sbrConfigData.noQmfBands>>1,
+                                    (statesInitFlag) ? 0 : QMF_FLAG_KEEP_STATES);
+
+        if(errorInfo == noError){
+          /* update delay */
+          hSbrEncoder->hPsEncConfig->sbrPsDelay = FDKsbrEnc_GetEnvEstDelay(&hSbrEncoder->sbrElement[0]->sbrChannel[0]->hEnvChannel.sbrExtractEnvelope);
+
+          if(noError != (errorInfo = PSEnc_Init( hSbrEncoder->hParametricStereo,
+                                                 hSbrEncoder->hPsEncConfig,
+                                                 hSbrEncoder->sbrElement[0]->sbrConfigData.noQmfSlots,
+                                                 hSbrEncoder->sbrElement[0]->sbrConfigData.noQmfBands
+                                                ,hSbrEncoder->dynamicRam
+                                                 )))
+          {
+            errorInfo = handBack(errorInfo);
+          }
+        }
+      }
+
+      hSbrEncoder->downsampledOffset = downsampledOffset;
+      hSbrEncoder->downmixSize = coreFrameLength*(*numChannels);
+      hSbrEncoder->bufferOffset = sbrOffset;
+      /* Delay Compensation: fill bitstream delay buffer with zero input signal */
+      if ( hSbrEncoder->nBitstrDelay > 0 )
+      {
+        error = FDKsbrEnc_DelayCompensation (hSbrEncoder, inputBuffer);
+        if (error != 0)
+          goto bail;
+      }
+
+      /* Set Output frame length */
+      *frameLength = coreFrameLength*DOWN_SMPL_FAC;
+      /* Input buffer offset */
+      *inputBufferOffset = fixMax(sbrOffset, downsampledOffset);
+
+
+    }
+
+    return error;
+
+bail:
+    /* Restore input settings */
+    *sampleRate = inputSampleRate;
+    *frameLength = coreFrameLength;
+    *numChannels = inputChannels;
+    *coreBandwidth = inputBandWidth;
+
+    return error;
+ }
+
+
+INT
+sbrEncoder_EncodeFrame(  HANDLE_SBR_ENCODER   hSbrEncoder,
+                         INT_PCM             *samples,
+                         UINT                 timeInStride,
+                         UINT                 sbrDataBits[(6)],
+                         UCHAR                sbrData[(6)][MAX_PAYLOAD_SIZE]
+                        )
+{
+  INT error;
+  int el;
+
+  for (el=0; el<hSbrEncoder->noElements; el++)
+  {
+    if (hSbrEncoder->sbrElement[el] != NULL)
+    {
+      error = FDKsbrEnc_EnvEncodeFrame(
+                                        hSbrEncoder,
+                                        el,
+                                        samples + hSbrEncoder->downsampledOffset,
+                                        timeInStride,
+                                       &sbrDataBits[el],
+                                        sbrData[el],
+                                        0
+                                       );
+      if (error)
+        return error;
+    }
+  }
+
+  if ( (hSbrEncoder->lfeChIdx!=-1) && (hSbrEncoder->fTimeDomainDownsampling) )
+  {
+      INT nOutSamples;
+
+      FDKaacEnc_Downsample(&hSbrEncoder->lfeDownSampler,
+                            samples + hSbrEncoder->downsampledOffset + hSbrEncoder->bufferOffset + hSbrEncoder->lfeChIdx,
+                            hSbrEncoder->frameSize,
+                            timeInStride,
+                            samples + hSbrEncoder->downsampledOffset + hSbrEncoder->lfeChIdx,
+                           &nOutSamples,
+                            hSbrEncoder->nChannels);
+  } /* lfe downsampler */
+
+  return 0;
+}
+
+
+INT sbrEncoder_UpdateBuffers(
+                            HANDLE_SBR_ENCODER hSbrEncoder,
+                            INT_PCM *timeBuffer
+                            )
+ {
+    if ( hSbrEncoder->downsampledOffset > 0 ) {
+      /* Move delayed downsampled data */
+      FDKmemcpy ( timeBuffer,
+                  timeBuffer + hSbrEncoder->downmixSize,
+                  sizeof(INT_PCM) * (hSbrEncoder->downsampledOffset) );
+    } else {
+      /* Move delayed input data */
+      FDKmemcpy ( timeBuffer,
+        timeBuffer + hSbrEncoder->nChannels * hSbrEncoder->frameSize,
+                  sizeof(INT_PCM) * hSbrEncoder->bufferOffset );
+    }
+    if ( hSbrEncoder->nBitstrDelay > 0  )
+    {
+      int el;
+
+      for (el=0; el<hSbrEncoder->noElements; el++)
+      {
+        FDKmemmove ( hSbrEncoder->sbrElement[el]->payloadDelayLine[0],
+                     hSbrEncoder->sbrElement[el]->payloadDelayLine[1],
+                     sizeof(UCHAR) * (hSbrEncoder->nBitstrDelay*MAX_PAYLOAD_SIZE) );
+
+        FDKmemmove( &hSbrEncoder->sbrElement[el]->payloadDelayLineSize[0],
+                    &hSbrEncoder->sbrElement[el]->payloadDelayLineSize[1],
+                    sizeof(UINT) * (hSbrEncoder->nBitstrDelay) );
+      }
+    }
+    return 0;
+ }
+
+
+INT sbrEncoder_GetEstimateBitrate(HANDLE_SBR_ENCODER hSbrEncoder)
+{
+  INT estimateBitrate = 0;
+
+  if(hSbrEncoder) {
+    estimateBitrate += hSbrEncoder->estimateBitrate;
+  }
+
+  return estimateBitrate;
+}
+
+INT sbrEncoder_GetInputDataDelay(HANDLE_SBR_ENCODER hSbrEncoder)
+{
+  INT delay = -1;
+
+  if(hSbrEncoder) {
+    delay = hSbrEncoder->inputDataDelay;
+  }
+  return delay;
+}
+
+
+INT sbrEncoder_GetLibInfo( LIB_INFO *info )
+{
+  int i;
+
+  if (info == NULL) {
+    return -1;
+  }
+  /* search for next free tab */
+  for (i = 0; i < FDK_MODULE_LAST; i++) {
+    if (info[i].module_id == FDK_NONE) break;
+  }
+  if (i == FDK_MODULE_LAST) {
+    return -1;
+  }
+  info += i;
+
+  info->module_id = FDK_SBRENC;
+  info->version = LIB_VERSION(SBRENCODER_LIB_VL0, SBRENCODER_LIB_VL1, SBRENCODER_LIB_VL2);
+  LIB_VERSION_STRING(info);
+  info->build_date = __DATE__;
+  info->build_time = __TIME__;
+  info->title = "SBR Encoder";
+
+  /* Set flags */
+  info->flags = 0
+    | CAPF_SBR_HQ
+    | CAPF_SBR_PS_MPEG
+    ;
+  /* End of flags */
+
+  return 0;
+}