SBR/AAC encoder updates, code clean up am: e1c78ed

am: 65750ea

* commit '65750eae6583754ea9d84fed41dc12d1fc3d73d0':
  SBR/AAC encoder updates, code clean up

Change-Id: Ife18fb3ee2fe76fab1e5ab8256addf5d39834c2f

8 files changed, 151 insertions, 83 deletions

diff --git a/libAACenc/src/aacenc.cpp b/libAACenc/src/aacenc.cpp
index c47e882..5e8c08d 100644
--- a/libAACenc/src/aacenc.cpp
+++ b/libAACenc/src/aacenc.cpp
@@ -107,6 +107,39 @@ amm-info@iis.fraunhofer.de
 
 #define MIN_BUFSIZE_PER_EFF_CHAN 6144
 
+INT FDKaacEnc_CalcBitsPerFrame(
+        const INT bitRate,
+        const INT frameLength,
+        const INT samplingRate
+        )
+{
+    int shift = 0;
+    while ((frameLength & ~((1 << (shift + 1)) - 1)) == frameLength
+        && (samplingRate & ~((1 << (shift + 1)) - 1)) == samplingRate)
+    {
+      shift++;
+    }
+
+    return (bitRate*(frameLength>>shift)) / (samplingRate>>shift);
+}
+
+INT FDKaacEnc_CalcBitrate(
+        const INT bitsPerFrame,
+        const INT frameLength,
+        const INT samplingRate
+        )
+{
+    int shift = 0;
+    while ((frameLength & ~((1 << (shift + 1)) - 1)) == frameLength
+        && (samplingRate & ~((1 << (shift + 1)) - 1)) == samplingRate)
+    {
+      shift++;
+    }
+
+    return (bitsPerFrame * (samplingRate>>shift)) / ( frameLength>>shift) ;
+
+}
+
 static AAC_ENCODER_ERROR FDKaacEnc_InitCheckAncillary(INT bitRate,
                                                       INT framelength,
                                                       INT ancillaryRate,
@@ -220,21 +253,19 @@ INT FDKaacEnc_GetVBRBitrate(INT bitrateMode, CHANNEL_MODE channelMode)
 /**
  * \brief  Convert encoder bitreservoir value for transport library.
  *
- * \param bitrateMode           Bitratemode used in current encoder instance. Se ::AACENC_BITRATE_MODE
- * \param bitresTotal           Encoder bitreservoir level in bits.
+ * \param hAacEnc               Encoder handle
  *
  * \return  Corrected bitreservoir level used in transport library.
  */
 static INT FDKaacEnc_EncBitresToTpBitres(
-        const AACENC_BITRATE_MODE bitrateMode,
-        const INT                 bitresTotal
+        const HANDLE_AAC_ENC      hAacEnc
         )
 {
   INT transporBitreservoir = 0;
 
-  switch (bitrateMode) {
+  switch (hAacEnc->bitrateMode) {
     case AACENC_BR_MODE_CBR:
-      transporBitreservoir = bitresTotal; /* encoder bitreservoir level */
+      transporBitreservoir = hAacEnc->qcKernel->bitResTot; /* encoder bitreservoir level */
       break;
     case AACENC_BR_MODE_VBR_1:
     case AACENC_BR_MODE_VBR_2:
@@ -253,6 +284,10 @@ static INT FDKaacEnc_EncBitresToTpBitres(
       FDK_ASSERT(0);
   }
 
+  if (hAacEnc->config->audioMuxVersion==2) {
+    transporBitreservoir = MIN_BUFSIZE_PER_EFF_CHAN * hAacEnc->channelMapping.nChannelsEff;
+  }
+
   return transporBitreservoir;
 }
 
@@ -289,6 +324,7 @@ void FDKaacEnc_AacInitDefaultConfig(AACENC_CONFIG *config)
     config->minBitsPerFrame = -1;                   /* minum number of bits in each AU */
     config->maxBitsPerFrame = -1;                   /* minum number of bits in each AU */
     config->bitreservoir    = -1;                   /* default, uninitialized value */
+    config->audioMuxVersion = -1;                   /* audio mux version not configured */
 
     /* init tabs in fixpoint_math */
     InitLdInt();
@@ -564,7 +600,10 @@ AAC_ENCODER_ERROR FDKaacEnc_Initialize(HANDLE_AAC_ENC      hAacEnc,
       qcInit.averageBits     = (averageBitsPerFrame+7)&~7;
       qcInit.bitRes          = MIN_BUFSIZE_PER_EFF_CHAN*cm->nChannelsEff;
       qcInit.maxBits         = MIN_BUFSIZE_PER_EFF_CHAN*cm->nChannelsEff;
-      qcInit.minBits         = 0;
+      qcInit.maxBits         = (config->maxBitsPerFrame!=-1) ? fixMin(qcInit.maxBits, config->maxBitsPerFrame) : qcInit.maxBits;
+      qcInit.maxBits         = fixMax(qcInit.maxBits, (averageBitsPerFrame+7)&~7);
+      qcInit.minBits         = (config->minBitsPerFrame!=-1) ? config->minBitsPerFrame : 0;
+      qcInit.minBits         = fixMin(qcInit.minBits, averageBitsPerFrame&~7);
   }
   else
   {
@@ -575,9 +614,11 @@ AAC_ENCODER_ERROR FDKaacEnc_Initialize(HANDLE_AAC_ENC      hAacEnc,
 
       qcInit.maxBits         = fixMin(MIN_BUFSIZE_PER_EFF_CHAN*cm->nChannelsEff, ((averageBitsPerFrame+7)&~7)+qcInit.bitRes);
       qcInit.maxBits         = (config->maxBitsPerFrame!=-1) ? fixMin(qcInit.maxBits, config->maxBitsPerFrame) : qcInit.maxBits;
+      qcInit.maxBits         = fixMin(MIN_BUFSIZE_PER_EFF_CHAN*cm->nChannelsEff, fixMax(qcInit.maxBits, (averageBitsPerFrame+7+8)&~7));
 
       qcInit.minBits         = fixMax(0, ((averageBitsPerFrame-1)&~7)-qcInit.bitRes-transportEnc_GetStaticBits(hTpEnc, ((averageBitsPerFrame+7)&~7)+qcInit.bitRes));
       qcInit.minBits         = (config->minBitsPerFrame!=-1) ? fixMax(qcInit.minBits, config->minBitsPerFrame) : qcInit.minBits;
+      qcInit.minBits         = fixMin(qcInit.minBits, (averageBitsPerFrame - transportEnc_GetStaticBits(hTpEnc, qcInit.maxBits))&~7);
   }
 
   qcInit.sampleRate          = config->sampleRate;
@@ -585,11 +626,9 @@ AAC_ENCODER_ERROR FDKaacEnc_Initialize(HANDLE_AAC_ENC      hAacEnc,
   qcInit.nSubFrames          = config->nSubFrames;
   qcInit.padding.paddingRest = config->sampleRate;
 
-  /* Calc meanPe */
-  bw_ratio = fDivNorm((FIXP_DBL)hAacEnc->bandwidth90dB, (FIXP_DBL)(config->sampleRate>>1), &qbw);
-  qbw = DFRACT_BITS-1-qbw;
-  /* qcInit.meanPe = 10.0f * FRAME_LEN_LONG * hAacEnc->bandwidth90dB/(config->sampleRate/2.0f); */
-  qcInit.meanPe = fMult(bw_ratio, (FIXP_DBL)((10*config->framelength)<<16)) >> (qbw-15);
+  /* Calc meanPe: qcInit.meanPe = 10.0f * FRAME_LEN_LONG * hAacEnc->bandwidth90dB/(config->sampleRate/2.0f); */
+  bw_ratio = fDivNorm((FIXP_DBL)(10*config->framelength*hAacEnc->bandwidth90dB), (FIXP_DBL)(config->sampleRate), &qbw);
+  qcInit.meanPe = FDKmax((INT)scaleValue(bw_ratio, qbw+1-(DFRACT_BITS-1)), 1);
 
   /* Calc maxBitFac */
   mbfac = fDivNorm((MIN_BUFSIZE_PER_EFF_CHAN-744)*cm->nChannelsEff, qcInit.averageBits/qcInit.nSubFrames, &qmbfac);
@@ -651,23 +690,7 @@ AAC_ENCODER_ERROR FDKaacEnc_Initialize(HANDLE_AAC_ENC      hAacEnc,
   if (ErrorStatus != AAC_ENC_OK)
     goto bail;
 
-  /* Map virtual aot's to intern aot used in bitstream writer. */
-  switch (hAacEnc->config->audioObjectType) {
-    case AOT_MP2_AAC_LC:
-    case AOT_DABPLUS_AAC_LC:
-      hAacEnc->aot = AOT_AAC_LC;
-      break;
-    case AOT_MP2_SBR:
-    case AOT_DABPLUS_SBR:
-      hAacEnc->aot = AOT_SBR;
-      break;
-    case AOT_MP2_PS:
-    case AOT_DABPLUS_PS:
-      hAacEnc->aot = AOT_PS;
-      break;
-    default:
-      hAacEnc->aot = hAacEnc->config->audioObjectType;
-  }
+  hAacEnc->aot = hAacEnc->config->audioObjectType;
 
   /* common things */
 
@@ -932,7 +955,7 @@ AAC_ENCODER_ERROR FDKaacEnc_EncodeFrame( HANDLE_AAC_ENC       hAacEnc,
               transportEnc_WriteAccessUnit(
                     hTpEnc,
                     totalBits,
-                    FDKaacEnc_EncBitresToTpBitres(hAacEnc->bitrateMode, hAacEnc->qcKernel->bitResTot),
+                    FDKaacEnc_EncBitresToTpBitres(hAacEnc),
                     cm->nChannelsEff);
 
               /* write bitstream */
diff --git a/libAACenc/src/aacenc.h b/libAACenc/src/aacenc.h
index 87fc3e8..61520de 100644
--- a/libAACenc/src/aacenc.h
+++ b/libAACenc/src/aacenc.h
@@ -2,7 +2,7 @@
 /* -----------------------------------------------------------------------------------------------------------
 Software License for The Fraunhofer FDK AAC Codec Library for Android
 
-© Copyright  1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
+© Copyright  1995 - 2015 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
   All rights reserved.
 
  1.    INTRODUCTION
@@ -204,6 +204,8 @@ struct AACENC_CONFIG {
   INT   maxBitsPerFrame;        /* maximum number of bits in AU */
   INT   bitreservoir;           /* size of bitreservoir */
 
+  INT   audioMuxVersion;        /* audio mux version in loas/latm transport format */
+
   UINT  sbrRatio;               /* sbr sampling rate ratio: dual- or single-rate */
 
   UCHAR useTns;                 /* flag: use temporal noise shaping */
@@ -223,6 +225,36 @@ typedef struct {
 typedef struct AAC_ENC *HANDLE_AAC_ENC;
 
 /**
+ * \brief Calculate framesize in bits for given bit rate, frame length and sampling rate.
+ *
+ * \param bitRate               Ttarget bitrate in bits per second.
+ * \param frameLength           Number of audio samples in one frame.
+ * \param samplingRate          Sampling rate in Hz.
+ *
+ * \return                      Framesize in bits per frame.
+*/
+INT FDKaacEnc_CalcBitsPerFrame(
+        const INT bitRate,
+        const INT frameLength,
+        const INT samplingRate
+        );
+
+/**
+ * \brief Calculate bitrate in bits per second for given framesize, frame length and sampling rate.
+ *
+ * \param bitsPerFrame          Framesize in bits per frame.
+ * \param frameLength           Number of audio samples in one frame.
+ * \param samplingRate          Sampling rate in Hz.
+ *
+ * \return                      Bitrate in bits per second.
+*/
+INT FDKaacEnc_CalcBitrate(
+        const INT bitsPerFrame,
+        const INT frameLength,
+        const INT samplingRate
+        );
+
+/**
  * \brief Limit given bit rate to a valid value
  * \param hTpEnc transport encoder handle
  * \param coreSamplingRate the sample rate to be used for the AAC encoder
diff --git a/libAACenc/src/aacenc_lib.cpp b/libAACenc/src/aacenc_lib.cpp
index 02f83bf..9a3b214 100644
--- a/libAACenc/src/aacenc_lib.cpp
+++ b/libAACenc/src/aacenc_lib.cpp
@@ -98,7 +98,7 @@ amm-info@iis.fraunhofer.de
 /* Encoder library info */
 #define AACENCODER_LIB_VL0 3
 #define AACENCODER_LIB_VL1 4
-#define AACENCODER_LIB_VL2 14
+#define AACENCODER_LIB_VL2 19
 #define AACENCODER_LIB_TITLE "AAC Encoder"
 #ifdef __ANDROID__
 #define AACENCODER_LIB_BUILD_DATE ""
@@ -153,6 +153,7 @@ typedef struct {
     UINT              userAfterburner;
     UINT              userFramelength;
     UINT              userAncDataRate;
+    UINT              userPeakBitrate;
 
     UCHAR             userTns;               /*!< Use TNS coding. */
     UCHAR             userPns;               /*!< Use PNS coding. */
@@ -326,10 +327,7 @@ static inline INT isSbrActive(const HANDLE_AACENC_CONFIG hAacConfig)
 {
     INT sbrUsed = 0;
 
-    if ( (hAacConfig->audioObjectType==AOT_SBR)         || (hAacConfig->audioObjectType==AOT_PS)
-      || (hAacConfig->audioObjectType==AOT_MP2_SBR)     || (hAacConfig->audioObjectType==AOT_MP2_PS)
-      || (hAacConfig->audioObjectType==AOT_DABPLUS_SBR) || (hAacConfig->audioObjectType==AOT_DABPLUS_PS)
-      || (hAacConfig->audioObjectType==AOT_DRM_SBR)     || (hAacConfig->audioObjectType==AOT_DRM_MPEG_PS) )
+    if ( (hAacConfig->audioObjectType==AOT_SBR) || (hAacConfig->audioObjectType==AOT_PS) )
     {
         sbrUsed = 1;
     }
@@ -345,10 +343,7 @@ static inline INT isPsActive(const AUDIO_OBJECT_TYPE audioObjectType)
 {
     INT psUsed = 0;
 
-    if ( (audioObjectType==AOT_PS)
-      || (audioObjectType==AOT_MP2_PS)
-      || (audioObjectType==AOT_DABPLUS_PS)
-      || (audioObjectType==AOT_DRM_MPEG_PS) )
+    if ( (audioObjectType==AOT_PS) )
     {
         psUsed = 1;
     }
@@ -373,8 +368,7 @@ static SBR_PS_SIGNALING getSbrSignalingMode(
     sbrSignaling = SIG_IMPLICIT; /* default: implicit signaling */
   }
 
-  if ((audioObjectType==AOT_AAC_LC)     || (audioObjectType==AOT_SBR)     || (audioObjectType==AOT_PS)    ||
-      (audioObjectType==AOT_MP2_AAC_LC) || (audioObjectType==AOT_MP2_SBR) || (audioObjectType==AOT_MP2_PS) ) {
+  if ( (audioObjectType==AOT_AAC_LC) || (audioObjectType==AOT_SBR) || (audioObjectType==AOT_PS) ) {
     switch (transportType) {
       case TT_MP4_ADIF:
       case TT_MP4_ADTS:
@@ -430,22 +424,7 @@ static void FDKaacEnc_MapConfig(
 
   cc->flags = 0;
 
-  /* Map virtual aot to transport aot. */
-  switch (hAacConfig->audioObjectType) {
-    case AOT_MP2_AAC_LC:
-      transport_AOT = AOT_AAC_LC;
-      break;
-    case AOT_MP2_SBR:
-      transport_AOT = AOT_SBR;
-      cc->flags |= CC_SBR;
-     break;
-    case AOT_MP2_PS:
-      transport_AOT = AOT_PS;
-      cc->flags |= CC_SBR;
-      break;
-    default:
-      transport_AOT = hAacConfig->audioObjectType;
-  }
+  transport_AOT = hAacConfig->audioObjectType;
 
   if (hAacConfig->audioObjectType == AOT_ER_AAC_ELD) {
     cc->flags |= (hAacConfig->syntaxFlags & AC_SBR_PRESENT) ? CC_SBR : 0;
@@ -511,16 +490,7 @@ static void FDKaacEnc_MapConfig(
   cc->samplingRate    = hAacConfig->sampleRate;
 
   /* Mpeg-4 signaling for transport library. */
-  switch ( hAacConfig->audioObjectType ) {
-    case AOT_MP2_AAC_LC:
-    case AOT_MP2_SBR:
-    case AOT_MP2_PS:
-      cc->flags &= ~CC_MPEG_ID; /* Required for ADTS. */
-      cc->extAOT = AOT_NULL_OBJECT;
-      break;
-    default:
-      cc->flags |= CC_MPEG_ID;
-  }
+  cc->flags |= CC_MPEG_ID;
 
   /* ER-tools signaling. */
   cc->flags     |= (hAacConfig->syntaxFlags & AC_ER_VCB11) ? CC_VCB11 : 0;
@@ -585,6 +555,7 @@ AAC_ENCODER_ERROR aacEncDefaultConfig(HANDLE_AACENC_CONFIG hAacConfig,
     config->userChannelMode = hAacConfig->channelMode;
     config->userBitrate     = hAacConfig->bitRate;
     config->userBitrateMode = hAacConfig->bitrateMode;
+    config->userPeakBitrate = (UINT)-1;
     config->userBandwidth   = hAacConfig->bandWidth;
     config->userTns         = hAacConfig->useTns;
     config->userPns         = hAacConfig->usePns;
@@ -792,12 +763,15 @@ AACENC_ERROR FDKaacEnc_AdjustEncSettings(HANDLE_AACENCODER hAacEncoder,
     hAacConfig->syntaxFlags     = 0;
     hAacConfig->epConfig        = -1;
 
+    if (config->userTpType==TT_MP4_LATM_MCP1 || config->userTpType==TT_MP4_LATM_MCP0 || config->userTpType==TT_MP4_LOAS) {
+      hAacConfig->audioMuxVersion = config->userTpAmxv;
+    }
+    else {
+      hAacConfig->audioMuxVersion = -1;
+    }
+
     /* Adapt internal AOT when necessary. */
     switch ( hAacConfig->audioObjectType ) {
-      case AOT_MP2_AAC_LC:
-      case AOT_MP2_SBR:
-      case AOT_MP2_PS:
-          hAacConfig->usePns = 0;
       case AOT_AAC_LC:
       case AOT_SBR:
       case AOT_PS:
@@ -884,6 +858,18 @@ AACENC_ERROR FDKaacEnc_AdjustEncSettings(HANDLE_AACENCODER hAacEncoder,
         }
     }
 
+    if ((hAacConfig->bitrateMode >= 0) && (hAacConfig->bitrateMode <= 5)) {
+      if ((INT)config->userPeakBitrate != -1) {
+        hAacConfig->maxBitsPerFrame = (FDKaacEnc_CalcBitsPerFrame(fMax(hAacConfig->bitRate, (INT)config->userPeakBitrate), hAacConfig->framelength, hAacConfig->sampleRate) + 7)&~7;
+      }
+      else {
+        hAacConfig->maxBitsPerFrame = -1;
+      }
+      if (hAacConfig->audioMuxVersion==2) {
+        hAacConfig->minBitsPerFrame = fMin(32*8, FDKaacEnc_CalcBitsPerFrame(hAacConfig->bitRate, hAacConfig->framelength, hAacConfig->sampleRate))&~7;
+      }
+    }
+
     /* Initialize SBR parameters */
     if ( (hAacConfig->audioObjectType==AOT_ER_AAC_ELD)
       && (config->userSbrEnabled == (UCHAR)-1) && (config->userSbrRatio==0) )
@@ -1139,7 +1125,7 @@ static AACENC_ERROR aacEncInit(HANDLE_AACENCODER  hAacEncoder,
                 hAacConfig);
 
         /* create flags for transport encoder */
-        if (config->userTpAmxv == 1) {
+        if (config->userTpAmxv != 0) {
             flags |= TP_FLAG_LATM_AMV;
         }
         /* Clear output buffer */
@@ -1569,7 +1555,7 @@ AACENC_ERROR aacEncEncode(
           && ((hAacEncoder->extParam.userChannelMode==MODE_1_2_2)||(hAacEncoder->extParam.userChannelMode==MODE_1_2_2_1)) )
         {
           /* Set matrix mixdown coefficient. */
-          UINT pceValue = (UINT)( (1<<3) | ((matrix_mixdown_idx&0x3)<<1) | 1 );
+          UINT pceValue = (UINT)( (0<<3) | ((matrix_mixdown_idx&0x3)<<1) | 1 );
           if (hAacEncoder->extParam.userPceAdditions != pceValue) {
             hAacEncoder->extParam.userPceAdditions = pceValue;
             hAacEncoder->InitFlags |= AACENC_INIT_TRANSPORT;
@@ -1785,19 +1771,16 @@ AACENC_ERROR aacEncoder_SetParam(
             /* check if AOT matches the allocated modules */
             switch ( value ) {
               case AOT_PS:
-              case AOT_MP2_PS:
                 if (!(hAacEncoder->encoder_modis & (ENC_MODE_FLAG_PS))) {
                   err = AACENC_INVALID_CONFIG;
                   goto bail;
                 }
               case AOT_SBR:
-              case AOT_MP2_SBR:
                 if (!(hAacEncoder->encoder_modis & (ENC_MODE_FLAG_SBR))) {
                   err = AACENC_INVALID_CONFIG;
                   goto bail;
                 }
               case AOT_AAC_LC:
-              case AOT_MP2_AAC_LC:
               case AOT_ER_AAC_LD:
               case AOT_ER_AAC_ELD:
                 if (!(hAacEncoder->encoder_modis & (ENC_MODE_FLAG_AAC))) {
@@ -1823,6 +1806,7 @@ AACENC_ERROR aacEncoder_SetParam(
         if (settings->userBitrateMode != value) {
             switch ( value ) {
               case 0:
+              case 1: case 2: case 3: case 4: case 5:
               case 8:
                 settings->userBitrateMode = value;
                 hAacEncoder->InitFlags |= AACENC_INIT_CONFIG | AACENC_INIT_TRANSPORT;
@@ -1973,6 +1957,16 @@ AACENC_ERROR aacEncoder_SetParam(
             hAacEncoder->InitFlags |= AACENC_INIT_TRANSPORT;
         }
         break;
+    case AACENC_AUDIOMUXVER:
+        if (settings->userTpAmxv != value) {
+            if ( !((value==0) || (value==1) || (value==2)) ) {
+                err = AACENC_INVALID_CONFIG;
+                break;
+            }
+            settings->userTpAmxv = value;
+            hAacEncoder->InitFlags |= AACENC_INIT_TRANSPORT;
+        }
+        break;
     case AACENC_TPSUBFRAMES:
         if (settings->userTpNsubFrames != value) {
             if (! ( (value>=1) && (value<=4) ) ) {
@@ -2006,6 +2000,12 @@ AACENC_ERROR aacEncoder_SetParam(
             hAacEncoder->InitFlags |= AACENC_INIT_CONFIG;
         }
         break;
+    case AACENC_PEAK_BITRATE:
+        if (settings->userPeakBitrate != value) {
+            settings->userPeakBitrate = value;
+            hAacEncoder->InitFlags |= AACENC_INIT_CONFIG | AACENC_INIT_TRANSPORT;
+        }
+        break;
     default:
       err = AACENC_UNSUPPORTED_PARAMETER;
       break;
@@ -2076,6 +2076,9 @@ UINT aacEncoder_GetParam(
     case AACENC_HEADER_PERIOD:
         value = (UINT)hAacEncoder->coderConfig.headerPeriod;
         break;
+    case AACENC_AUDIOMUXVER:
+        value = (UINT)hAacEncoder->aacConfig.audioMuxVersion;
+        break;
     case AACENC_TPSUBFRAMES:
         value = (UINT)settings->userTpNsubFrames;
         break;
@@ -2088,6 +2091,12 @@ UINT aacEncoder_GetParam(
     case AACENC_METADATA_MODE:
         value = (hAacEncoder->metaDataAllowed==0) ? 0 : (UINT)settings->userMetaDataMode;
         break;
+    case AACENC_PEAK_BITRATE:
+        value = (UINT)-1; /* peak bitrate parameter is meaningless */
+        if ( ((INT)hAacEncoder->extParam.userPeakBitrate!=-1) ) {
+          value = (UINT)(fMax((INT)hAacEncoder->extParam.userPeakBitrate, hAacEncoder->aacConfig.bitRate)); /* peak bitrate parameter is in use */
+        }
+        break;
     default:
       //err = MPS_INVALID_PARAMETER;
       break;
diff --git a/libAACenc/src/adj_thr.cpp b/libAACenc/src/adj_thr.cpp
index 69a70b4..c318843 100644
--- a/libAACenc/src/adj_thr.cpp
+++ b/libAACenc/src/adj_thr.cpp
@@ -2138,7 +2138,7 @@ static FIXP_DBL FDKaacEnc_bitresCalcBitFac(const INT       bitresBits,
         bresParam->clipSpendLow, bresParam->clipSpendHigh,
         bresParam->minBitSpend, bresParam->maxBitSpend, bitspend_slope);
 
-    pe_pers = fDivNorm(pex - adjThrChan->peMin, adjThrChan->peMax - adjThrChan->peMin);
+    pe_pers = (pex > adjThrChan->peMin) ? fDivNorm(pex - adjThrChan->peMin, adjThrChan->peMax - adjThrChan->peMin) : 0;
     tmp_fix = fMult(((FIXP_DBL)bitSpend + (FIXP_DBL)bitSave), pe_pers);
     bitresFac_fix = (UNITY>>1) - ((FIXP_DBL)bitSave>>1) + (tmp_fix>>1); qbres = (DFRACT_BITS-2);
 
diff --git a/libAACenc/src/intensity.cpp b/libAACenc/src/intensity.cpp
index 6d807f7..b45b27b 100644
--- a/libAACenc/src/intensity.cpp
+++ b/libAACenc/src/intensity.cpp
@@ -2,7 +2,7 @@
 /* -----------------------------------------------------------------------------------------------------------
 Software License for The Fraunhofer FDK AAC Codec Library for Android
 
-© Copyright  1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
+© Copyright  1995 - 2015 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
   All rights reserved.
 
  1.    INTRODUCTION
@@ -325,7 +325,6 @@ FDKaacEnc_prepareIntensityDecision(const FIXP_DBL    *sfbEnergyLeft,
 
       channelCorr[sfb + sfboffs] = FL2FXCONST_DBL(0.0f);
 
-      FDK_ASSERT(50 >= 49);
       /* max width of scalefactorband is 96; width's are always even */
       /* inv_n is scaled with factor 2 to compensate fMultDiv2() in subsequent loops */
       inv_n = GetInvInt((sfbOffset[sfb + sfboffs + 1] - sfbOffset[sfb + sfboffs])>>1);
diff --git a/libAACenc/src/psy_configuration.cpp b/libAACenc/src/psy_configuration.cpp
index 4393fa1..9a72c68 100644
--- a/libAACenc/src/psy_configuration.cpp
+++ b/libAACenc/src/psy_configuration.cpp
@@ -2,7 +2,7 @@
 /* -----------------------------------------------------------------------------------------------------------
 Software License for The Fraunhofer FDK AAC Codec Library for Android
 
-© Copyright  1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
+© Copyright  1995 - 2015 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
   All rights reserved.
 
  1.    INTRODUCTION
@@ -634,13 +634,14 @@ AAC_ENCODER_ERROR FDKaacEnc_InitPsyConfiguration(INT   bitrate,
         if (psyConf->sfbOffset[sfb] >= psyConf->lowpassLine)
             break;
     }
-    psyConf->sfbActive = sfb;
+    psyConf->sfbActive = FDKmax(sfb, 1);
 
     for (sfb = 0; sfb < psyConf->sfbCnt; sfb++){
         if (psyConf->sfbOffset[sfb] >= psyConf->lowpassLineLFE)
             break;
     }
     psyConf->sfbActiveLFE = sfb;
+    psyConf->sfbActive = FDKmax(psyConf->sfbActive, psyConf->sfbActiveLFE);
 
     /* calculate minSnr */
     FDKaacEnc_initMinSnr(bitrate,
diff --git a/libAACenc/src/psy_main.cpp b/libAACenc/src/psy_main.cpp
index 1c593f8..3cc9438 100644
--- a/libAACenc/src/psy_main.cpp
+++ b/libAACenc/src/psy_main.cpp
@@ -621,7 +621,7 @@ AAC_ENCODER_ERROR FDKaacEnc_psyMain(INT                 channels,
           FDKmemclear(&psyData[ch]->mdctSpectrum[psyData[ch]->lowpassLine+wOffset],
                       (windowLength[ch]-psyData[ch]->lowpassLine)*sizeof(FIXP_DBL));
 
-          if (hPsyConfLong->filterbank != FB_LC) {
+          if ( (hPsyConfLong->filterbank != FB_LC) && (psyData[ch]->lowpassLine >= FADE_OUT_LEN) ) {
             /* Do blending to reduce gibbs artifacts */
             for (int i=0; i<FADE_OUT_LEN; i++) {
               psyData[ch]->mdctSpectrum[psyData[ch]->lowpassLine+wOffset - FADE_OUT_LEN + i] = fMult(psyData[ch]->mdctSpectrum[psyData[ch]->lowpassLine+wOffset - FADE_OUT_LEN + i], fadeOutFactor[i]);
diff --git a/libAACenc/src/qc_main.cpp b/libAACenc/src/qc_main.cpp
index 278bcb2..7503309 100644
--- a/libAACenc/src/qc_main.cpp
+++ b/libAACenc/src/qc_main.cpp
@@ -1248,6 +1248,8 @@ AAC_ENCODER_ERROR FDKaacEnc_updateFillBits(CHANNEL_MAPPING*          cm,
     case QCDATA_BR_MODE_VBR_4:
     case QCDATA_BR_MODE_VBR_5:
       qcOut[0]->totFillBits = (qcOut[0]->grantedDynBits - qcOut[0]->usedDynBits)&7; /* precalculate alignment bits */
+      qcOut[0]->totalBits = qcOut[0]->staticBits + qcOut[0]->usedDynBits + qcOut[0]->totFillBits + qcOut[0]->elementExtBits + qcOut[0]->globalExtBits;
+      qcOut[0]->totFillBits += ( fixMax(0, qcKernel->minBitsPerFrame - qcOut[0]->totalBits) + 7) & ~7;
       break;
 
     case QCDATA_BR_MODE_CBR:
@@ -1257,6 +1259,8 @@ AAC_ENCODER_ERROR FDKaacEnc_updateFillBits(CHANNEL_MAPPING*          cm,
       /* processing fill-bits */
       INT deltaBitRes = qcOut[0]->grantedDynBits - qcOut[0]->usedDynBits ;
       qcOut[0]->totFillBits = fixMax((deltaBitRes&7), (deltaBitRes - (fixMax(0,bitResSpace-7)&~7)));
+      qcOut[0]->totalBits = qcOut[0]->staticBits + qcOut[0]->usedDynBits + qcOut[0]->totFillBits + qcOut[0]->elementExtBits + qcOut[0]->globalExtBits;
+      qcOut[0]->totFillBits += ( fixMax(0, qcKernel->minBitsPerFrame - qcOut[0]->totalBits) + 7) & ~7;
       break;
   } /* switch (qcKernel->bitrateMode) */