diff --git a/libAACdec/src/aacdecoder.cpp b/libAACdec/src/aacdecoder.cpp
index 8993927..a529389 100644
--- a/libAACdec/src/aacdecoder.cpp
+++ b/libAACdec/src/aacdecoder.cpp
@@ -234,7 +234,8 @@ void CAacDecoder_SyncQmfMode(HANDLE_AACDECODER self) {
               MODE_HQ))) { /* MPS decoder does support the requested mode. */
           break;
         }
-      } /* Fall-through: */
+      }
+        FDK_FALLTHROUGH;
       default:
         if (self->qmfModeUser == NOT_DEFINED) {
           /* Revert in case mpegSurroundDecoder_SetParam() fails. */
@@ -938,6 +939,7 @@ static AAC_DECODER_ERROR CAacDecoder_ExtPayloadParse(
 
     case EXT_SBR_DATA_CRC:
       crcFlag = 1;
+      FDK_FALLTHROUGH;
     case EXT_SBR_DATA:
       if (IS_CHANNEL_ELEMENT(previous_element)) {
         SBR_ERROR sbrError;
@@ -1076,6 +1078,7 @@ static AAC_DECODER_ERROR CAacDecoder_ExtPayloadParse(
          * intentional. */
         break;
       }
+      FDK_FALLTHROUGH;
 
     case EXT_FIL:
 
@@ -1108,12 +1111,13 @@ static AAC_DECODER_ERROR aacDecoder_ParseExplicitMpsAndSbr(
   /* get the remaining bits of this frame */
   bitCnt = transportDec_GetAuBitsRemaining(self->hInput, 0);
 
-  if ((bitCnt > 0) && (self->flags[0] & AC_SBR_PRESENT) &&
+  if ((self->flags[0] & AC_SBR_PRESENT) &&
       (self->flags[0] & (AC_USAC | AC_RSVD50 | AC_ELD | AC_DRM))) {
     SBR_ERROR err = SBRDEC_OK;
     int chElIdx, numChElements = el_cnt[ID_SCE] + el_cnt[ID_CPE] +
                                  el_cnt[ID_LFE] + el_cnt[ID_USAC_SCE] +
                                  el_cnt[ID_USAC_CPE] + el_cnt[ID_USAC_LFE];
+    INT bitCntTmp = bitCnt;
 
     if (self->flags[0] & AC_USAC) {
       chElIdx = numChElements - 1;
@@ -1123,6 +1127,7 @@ static AAC_DECODER_ERROR aacDecoder_ParseExplicitMpsAndSbr(
 
     for (; chElIdx < numChElements; chElIdx += 1) {
       MP4_ELEMENT_ID sbrType;
+      SBR_ERROR errTmp;
       if (self->flags[0] & (AC_USAC)) {
         FDK_ASSERT((self->elements[element_index] == ID_USAC_SCE) ||
                    (self->elements[element_index] == ID_USAC_CPE));
@@ -1132,19 +1137,21 @@ static AAC_DECODER_ERROR aacDecoder_ParseExplicitMpsAndSbr(
                       : ID_SCE;
       } else
         sbrType = self->elements[chElIdx];
-      err = sbrDecoder_Parse(self->hSbrDecoder, bs, self->pDrmBsBuffer,
-                             self->drmBsBufferSize, &bitCnt, -1,
-                             self->flags[0] & AC_SBRCRC, sbrType, chElIdx,
-                             self->flags[0], self->elFlags);
-      if (err != SBRDEC_OK) {
-        break;
+      errTmp = sbrDecoder_Parse(self->hSbrDecoder, bs, self->pDrmBsBuffer,
+                                self->drmBsBufferSize, &bitCnt, -1,
+                                self->flags[0] & AC_SBRCRC, sbrType, chElIdx,
+                                self->flags[0], self->elFlags);
+      if (errTmp != SBRDEC_OK) {
+        err = errTmp;
+        bitCntTmp = bitCnt;
+        bitCnt = 0;
       }
     }
     switch (err) {
       case SBRDEC_PARSE_ERROR:
         /* Can not go on parsing because we do not
             know the length of the SBR extension data. */
-        FDKpushFor(bs, bitCnt);
+        FDKpushFor(bs, bitCntTmp);
         bitCnt = 0;
         break;
       case SBRDEC_OK:
@@ -1495,11 +1502,13 @@ CAacDecoder_Init(HANDLE_AACDECODER self, const CSAudioSpecificConfig *asc,
   switch (asc->m_aot) {
     case AOT_AAC_LC:
       self->streamInfo.profile = 1;
+      FDK_FALLTHROUGH;
     case AOT_ER_AAC_SCAL:
       if (asc->m_sc.m_gaSpecificConfig.m_layer > 0) {
         /* aac_scalable_extension_element() currently not supported. */
         return AAC_DEC_UNSUPPORTED_FORMAT;
       }
+      FDK_FALLTHROUGH;
     case AOT_SBR:
     case AOT_PS:
     case AOT_ER_AAC_LC:
diff --git a/libAACdec/src/aacdecoder_lib.cpp b/libAACdec/src/aacdecoder_lib.cpp
index b528ef1..2860bf6 100644
--- a/libAACdec/src/aacdecoder_lib.cpp
+++ b/libAACdec/src/aacdecoder_lib.cpp
@@ -634,6 +634,7 @@ static AAC_DECODER_ERROR setConcealMethod(
     switch (err) {
       case PCMDMX_INVALID_HANDLE:
         errorStatus = AAC_DEC_INVALID_HANDLE;
+        break;
       case PCMDMX_OK:
         break;
       default:
diff --git a/libAACdec/src/channel.cpp b/libAACdec/src/channel.cpp
index cfffd57..a020034 100644
--- a/libAACdec/src/channel.cpp
+++ b/libAACdec/src/channel.cpp
@@ -592,6 +592,7 @@ AAC_DECODER_ERROR CChannelElement_Read(
                                             line: ~599 */
         /* Note: The missing "break" is intentional here, since we need to call
          * CBlock_ReadScaleFactorData(). */
+        FDK_FALLTHROUGH;
 
       case scale_factor_data:
         if (flags & AC_ER_RVLC) {
diff --git a/libAACdec/src/conceal.cpp b/libAACdec/src/conceal.cpp
index 569d672..5895cb8 100644
--- a/libAACdec/src/conceal.cpp
+++ b/libAACdec/src/conceal.cpp
@@ -1894,6 +1894,7 @@ INT CConcealment_TDFading(
     case ConcealState_FadeIn:
       idx = cntFadeFrames;
       idx -= TDFadeInStopBeforeFullLevel;
+      FDK_FALLTHROUGH;
     case ConcealState_Ok:
       fadeFactor = pConcealParams->fadeInFactor;
       idx = (concealState == ConcealState_Ok) ? -1 : idx;
diff --git a/libAACenc/src/aacenc_lib.cpp b/libAACenc/src/aacenc_lib.cpp
index f92cff4..9e0630c 100644
--- a/libAACenc/src/aacenc_lib.cpp
+++ b/libAACenc/src/aacenc_lib.cpp
@@ -907,6 +907,7 @@ static AACENC_ERROR FDKaacEnc_AdjustEncSettings(HANDLE_AACENCODER hAacEncoder,
     case AOT_MP2_AAC_LC:
     case AOT_MP2_SBR:
       hAacConfig->usePns = 0;
+      FDK_FALLTHROUGH;
     case AOT_AAC_LC:
     case AOT_SBR:
     case AOT_PS:
@@ -2091,12 +2092,14 @@ AACENC_ERROR aacEncoder_SetParam(const HANDLE_AACENCODER hAacEncoder,
               err = AACENC_INVALID_CONFIG;
               goto bail;
             }
+            FDK_FALLTHROUGH;
           case AOT_SBR:
           case AOT_MP2_SBR:
             if (!(hAacEncoder->encoder_modis & (ENC_MODE_FLAG_SBR))) {
               err = AACENC_INVALID_CONFIG;
               goto bail;
             }
+            FDK_FALLTHROUGH;
           case AOT_AAC_LC:
           case AOT_MP2_AAC_LC:
           case AOT_ER_AAC_LD:
diff --git a/libAACenc/src/bitenc.cpp b/libAACenc/src/bitenc.cpp
index 652d1fd..957e821 100644
--- a/libAACenc/src/bitenc.cpp
+++ b/libAACenc/src/bitenc.cpp
@@ -643,6 +643,7 @@ static INT FDKaacEnc_writeExtensionPayload(HANDLE_FDK_BITSTREAM hBitStream,
           FDKwriteBits(hBitStream, *extPayloadData++, 4); /* nibble */
         }
         extBitsUsed += 4;
+        FDK_FALLTHROUGH;
       case EXT_DYNAMIC_RANGE:
       case EXT_SBR_DATA:
       case EXT_SBR_DATA_CRC:
@@ -690,6 +691,7 @@ static INT FDKaacEnc_writeExtensionPayload(HANDLE_FDK_BITSTREAM hBitStream,
 
       case EXT_FILL_DATA:
         fillByte = 0xA5;
+        FDK_FALLTHROUGH;
       case EXT_FIL:
       default:
         if (hBitStream != NULL) {
diff --git a/libMpegTPDec/src/tpdec_asc.cpp b/libMpegTPDec/src/tpdec_asc.cpp
index 8d411e8..6260cad 100644
--- a/libMpegTPDec/src/tpdec_asc.cpp
+++ b/libMpegTPDec/src/tpdec_asc.cpp
@@ -467,6 +467,7 @@ void CProgramConfig_GetDefault(CProgramConfig *pPce, const UINT channelConfig) {
       pPce->BackElementIsCpe[1] = 1;
       pPce->NumChannels += 1;
       pPce->NumEffectiveChannels += 1;
+      FDK_FALLTHROUGH;
     case 11: /* 3/0/3.1ch */
       pPce->NumFrontChannelElements += 2;
       pPce->FrontElementIsCpe[0] = 0;
@@ -482,25 +483,30 @@ void CProgramConfig_GetDefault(CProgramConfig *pPce, const UINT channelConfig) {
     /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
     case 14:                               /* 2/0/0-3/0/2-0.1ch front height */
       pPce->FrontElementHeightInfo[2] = 1; /* Top speaker */
-    case 7:                                /* 5/0/2.1ch front */
+      FDK_FALLTHROUGH;
+    case 7: /* 5/0/2.1ch front */
       pPce->NumFrontChannelElements += 1;
       pPce->FrontElementIsCpe[2] = 1;
       pPce->NumChannels += 2;
       pPce->NumEffectiveChannels += 2;
+      FDK_FALLTHROUGH;
     case 6: /* 3/0/2.1ch */
       pPce->NumLfeChannelElements += 1;
       pPce->NumChannels += 1;
+      FDK_FALLTHROUGH;
     case 5: /* 3/0/2.0ch */
     case 4: /* 3/0/1.0ch */
       pPce->NumBackChannelElements += 1;
       pPce->BackElementIsCpe[0] = (channelConfig > 4) ? 1 : 0;
       pPce->NumChannels += (channelConfig > 4) ? 2 : 1;
       pPce->NumEffectiveChannels += (channelConfig > 4) ? 2 : 1;
+      FDK_FALLTHROUGH;
     case 3: /* 3/0/0.0ch */
       pPce->NumFrontChannelElements += 1;
       pPce->FrontElementIsCpe[1] = 1;
       pPce->NumChannels += 2;
       pPce->NumEffectiveChannels += 2;
+      FDK_FALLTHROUGH;
     case 1: /* 1/0/0.0ch */
       pPce->NumFrontChannelElements += 1;
       pPce->FrontElementIsCpe[0] = 0;
@@ -713,6 +719,7 @@ int CProgramConfig_LookupElement(CProgramConfig *pPce, UINT channelConfig,
       switch (elType) {
         case ID_CPE:
           isCpe = 1;
+          FDK_FALLTHROUGH;
         case ID_SCE:
           /* search in front channels */
           for (i = 0; i < pPce->NumFrontChannelElements; i++) {
@@ -1412,7 +1419,7 @@ static TRANSPORTDEC_ERROR EldSpecificConfig_Parse(CSAudioSpecificConfig *asc,
           break;
         }
 
-      /* fall-through */
+        FDK_FALLTHROUGH;
       default:
         for (cnt = 0; cnt < eldExtLen; cnt++) {
           FDKreadBits(hBs, 8);
@@ -2022,6 +2029,7 @@ static TRANSPORTDEC_ERROR AudioSpecificConfig_ExtensionParse(
         break;
       case ASCEXT_MPS: /* 0x76a */
         if (self->m_extensionAudioObjectType == AOT_MPEGS) break;
+        FDK_FALLTHROUGH;
       case ASCEXT_LDMPS: /* 0x7cc */
         if ((ascExtId == ASCEXT_LDMPS) &&
             (self->m_extensionAudioObjectType == AOT_LD_MPEGS))
@@ -2498,6 +2506,7 @@ TRANSPORTDEC_ERROR DrmRawSdcAudioConfig_Parse(
         switch (audioMode) {
           case 1: /* parametric stereo */
             self->m_psPresentFlag = 1;
+            FDK_FALLTHROUGH;
           case 0: /* mono */
             self->m_channelConfiguration = 1;
             break;
diff --git a/libMpegTPDec/src/tpdec_lib.cpp b/libMpegTPDec/src/tpdec_lib.cpp
index 2a40187..1976cb9 100644
--- a/libMpegTPDec/src/tpdec_lib.cpp
+++ b/libMpegTPDec/src/tpdec_lib.cpp
@@ -956,6 +956,7 @@ static TRANSPORTDEC_ERROR transportDec_readHeader(
         hTp->parser.latm.m_audioMuxLengthBytes = syncLayerFrameBits;
         syncLayerFrameBits <<= 3;
       }
+      FDK_FALLTHROUGH;
     case TT_MP4_LATM_MCP1:
     case TT_MP4_LATM_MCP0:
       if (hTp->numberOfRawDataBlocks <= 0) {
diff --git a/libMpegTPEnc/src/tpenc_lib.cpp b/libMpegTPEnc/src/tpenc_lib.cpp
index a8567b9..14ea5fe 100644
--- a/libMpegTPEnc/src/tpenc_lib.cpp
+++ b/libMpegTPEnc/src/tpenc_lib.cpp
@@ -212,6 +212,7 @@ static INT getPceRepetitionRate(const CHANNEL_MODE channelMode,
                                                  for potential matrix mixdown */
               break;
             }
+            FDK_FALLTHROUGH;
           case TT_MP4_LOAS:      /* PCE in ASC if chChonfig==0 */
           case TT_MP4_LATM_MCP1: /* PCE in ASC if chChonfig==0 */
           default:
diff --git a/libPCMutils/src/pcmdmx_lib.cpp b/libPCMutils/src/pcmdmx_lib.cpp
index b09a848..2070dbc 100644
--- a/libPCMutils/src/pcmdmx_lib.cpp
+++ b/libPCMutils/src/pcmdmx_lib.cpp
@@ -1043,6 +1043,7 @@ static PCMDMX_ERROR getMixFactors(const UCHAR inModeIsCfg,
       case CH_MODE_3_2_1_0:
         isValidCfg = FALSE;
         err = PCMDMX_INVALID_MODE;
+        FDK_FALLTHROUGH;
       case CH_MODE_3_0_3_1: /* chCfg 11 */
         /* 6.1ch:  C' = C;  L' = L;  R' = R;  LFE' = LFE;
                    Ls' = Ls*dmix_a_idx + Cs*dmix_b_idx;
@@ -1080,9 +1081,11 @@ static PCMDMX_ERROR getMixFactors(const UCHAR inModeIsCfg,
                       LEFT_REAR_CHANNEL, FL2FXCONST_DMX(0.5f), 1);
         dmxSetChannel(mixFactors, mixScales, LEFT_REAR_CHANNEL,
                       LEFT_REAR_CHANNEL, FL2FXCONST_DMX(0.5f), 1);
+        FDK_FALLTHROUGH;
       case CH_MODE_5_2_1_0:
         isValidCfg = FALSE;
         err = PCMDMX_INVALID_MODE;
+        FDK_FALLTHROUGH;
       case CH_MODE_5_0_2_1: /* chCfg 7 || 14 */
         if (inChCfg == 14) {
           /* 7.1ch Front Height:  C' = C;  Ls' = Ls;  Rs' = Rs;  LFE' = LFE;
diff --git a/libSACdec/src/sac_dec_lib.cpp b/libSACdec/src/sac_dec_lib.cpp
index 5ae89d1..e881599 100644
--- a/libSACdec/src/sac_dec_lib.cpp
+++ b/libSACdec/src/sac_dec_lib.cpp
@@ -1349,6 +1349,7 @@ int mpegSurroundDecoder_Parse(CMpegSurroundDecoder *pMpegSurroundDecoder,
                 pMpegSurroundDecoder->mpegSurroundSscIsGlobalCfg = 0;
               }
             }
+              FDK_FALLTHROUGH;
             case MPEGS_ANCTYPE_FRAME:
 
               if (pMpegSurroundDecoder
diff --git a/libSBRdec/src/env_extr.cpp b/libSBRdec/src/env_extr.cpp
index e6ae6dc..c72a7b6 100644
--- a/libSBRdec/src/env_extr.cpp
+++ b/libSBRdec/src/env_extr.cpp
@@ -1145,10 +1145,10 @@ static int sbrGetEnvelope(
   \brief    Generates frame info for FIXFIXonly frame class used for low delay
  version
 
-  \return   nothing
+  \return   zero for error, one for correct.
  ****************************************************************************/
-static void generateFixFixOnly(FRAME_INFO *hSbrFrameInfo, int tranPosInternal,
-                               int numberTimeSlots, const UINT flags) {
+static int generateFixFixOnly(FRAME_INFO *hSbrFrameInfo, int tranPosInternal,
+                              int numberTimeSlots, const UINT flags) {
   int nEnv, i, tranIdx;
   const int *pTable;
 
@@ -1159,12 +1159,11 @@ static void generateFixFixOnly(FRAME_INFO *hSbrFrameInfo, int tranPosInternal,
     case 15:
       pTable = FDK_sbrDecoder_envelopeTable_15[tranPosInternal];
       break;
-    default:
-      FDK_ASSERT(0);
-      /* fall through */
     case 16:
       pTable = FDK_sbrDecoder_envelopeTable_16[tranPosInternal];
       break;
+    default:
+      return 0;
   }
 
   /* look number of envelopes in table */
@@ -1187,6 +1186,8 @@ static void generateFixFixOnly(FRAME_INFO *hSbrFrameInfo, int tranPosInternal,
   /* nEnv is always > 1, so nNoiseEnvelopes is always 2 (IEC 14496-3 4.6.19.3.2)
    */
   hSbrFrameInfo->nNoiseEnvelopes = 2;
+
+  return 1;
 }
 
 /*!
@@ -1230,7 +1231,9 @@ static int extractLowDelayGrid(
   }
 
   /* calculate borders according to the transient position */
-  generateFixFixOnly(pFrameInfo, temp, numberTimeSlots, flags);
+  if (!generateFixFixOnly(pFrameInfo, temp, numberTimeSlots, flags)) {
+    return 0;
+  }
 
   /* decode freq res: */
   for (k = 0; k < pFrameInfo->nEnvelopes; k++) {
diff --git a/libSBRdec/src/hbe.cpp b/libSBRdec/src/hbe.cpp
index 53b21c9..1141e9c 100644
--- a/libSBRdec/src/hbe.cpp
+++ b/libSBRdec/src/hbe.cpp
@@ -1056,6 +1056,10 @@ SBR_ERROR QmfTransposerReInit(HANDLE_HBE_TRANSPOSER hQmfTransposer,
     const FIXP_QTW* tmp_t_sin;
 
     hQmfTransposer->startBand = FreqBandTable[0][0];
+    FDK_ASSERT((!hQmfTransposer->bSbr41 && hQmfTransposer->startBand <= 32) ||
+               (hQmfTransposer->bSbr41 &&
+                hQmfTransposer->startBand <=
+                    16)); /* is checked by resetFreqBandTables() */
     hQmfTransposer->stopBand = FreqBandTable[0][NSfb[0]];
 
     hQmfTransposer->synthSize =
diff --git a/libSBRdec/src/sbr_dec.cpp b/libSBRdec/src/sbr_dec.cpp
index 2e18e6c..30611e7 100644
--- a/libSBRdec/src/sbr_dec.cpp
+++ b/libSBRdec/src/sbr_dec.cpp
@@ -1248,7 +1248,7 @@ resetSbrDec(HANDLE_SBR_DEC hSbrDec, HANDLE_SBR_HEADER_DATA hHeaderData,
 
   hSbrDec->savedStates = 0;
 
-  if (flags & SBRDEC_USAC_HARMONICSBR) {
+  if ((flags & SBRDEC_USAC_HARMONICSBR) && applySbrProc) {
     sbrError = QmfTransposerReInit(hSbrDec->hHBE,
                                    hHeaderData->freqBandData.freqBandTable,
                                    hHeaderData->freqBandData.nSfb);
diff --git a/libSBRdec/src/sbrdecoder.cpp b/libSBRdec/src/sbrdecoder.cpp
index e2455da..4bc6f69 100644
--- a/libSBRdec/src/sbrdecoder.cpp
+++ b/libSBRdec/src/sbrdecoder.cpp
@@ -1150,6 +1150,11 @@ SBR_ERROR sbrDecoder_Parse(HANDLE_SBRDECODER self, HANDLE_FDK_BITSTREAM hBs,
 
   int lastSlot, lastHdrSlot = 0, thisHdrSlot = 0;
 
+  if (*count <= 0) {
+    setFrameErrorFlag(self->pSbrElement[elementIndex], FRAME_ERROR);
+    return SBRDEC_OK;
+  }
+
   /* SBR sanity checks */
   if (self == NULL) {
     errorStatus = SBRDEC_NOT_INITIALIZED;
@@ -1677,6 +1682,9 @@ static SBR_ERROR sbrDecoder_DecodeElement(
   /* reset */
   if (hSbrHeader->status & SBRDEC_HDR_STAT_RESET) {
     int ch;
+    int applySbrProc = (hSbrHeader->syncState == SBR_ACTIVE ||
+                        (hSbrHeader->frameErrorFlag == 0 &&
+                         hSbrHeader->syncState == SBR_HEADER));
     for (ch = 0; ch < numElementChannels; ch++) {
       SBR_ERROR errorStatusTmp = SBRDEC_OK;
 
@@ -1688,7 +1696,9 @@ static SBR_ERROR sbrDecoder_DecodeElement(
         hSbrHeader->syncState = UPSAMPLING;
       }
     }
-    hSbrHeader->status &= ~SBRDEC_HDR_STAT_RESET;
+    if (applySbrProc) {
+      hSbrHeader->status &= ~SBRDEC_HDR_STAT_RESET;
+    }
   }
 
   /* decoding */
diff --git a/libSYS/include/machine_type.h b/libSYS/include/machine_type.h
index be8de37..b66d5ad 100644
--- a/libSYS/include/machine_type.h
+++ b/libSYS/include/machine_type.h
@@ -379,6 +379,17 @@ it. Hence, a fully platform-independant way to use alignment is not supported.
 #define LNK_SECTION_L1_DATA_A
 #define LNK_SECTION_L1_DATA_B
 
+/**************************************************
+ * Macros regarding static code analysis
+ **************************************************/
+#if defined(__clang__)
+#define FDK_FALLTHROUGH [[clang::fallthrough]]
+#elif defined(__GNUC__) && (__GNUC__ >= 7)
+#define FDK_FALLTHROUGH __attribute__((fallthrough))
+#else
+#define FDK_FALLTHROUGH
+#endif
+
 #ifdef _MSC_VER
 /*
  * Sometimes certain features are excluded from compilation and therefore the