shithub: openh264

Download patch

ref: 8b8e0d4b3ed27be24708e80b9b25acbffe09d420
parent: 1e549e6f9ac604775d2d55b0939f46c294694f97
parent: 80862eec774e2c5ddc14c4ab085c3bdd18ee6421
author: Ethan Hugg <[email protected]>
date: Mon Feb 10 05:46:12 EST 2014

Merge pull request #274 from mstorsjo/typedef-cleanup

Remove typedefs for standard C++ types

--- a/codec/api/svc/codec_app_def.h
+++ b/codec/api/svc/codec_app_def.h
@@ -211,7 +211,7 @@
   bool    bEnableAdaptiveQuant; // adaptive quantization control
   bool    bEnableFrameSkip; // allow skipping frames to keep the bitrate within limits
   bool	bEnableCropPic;	// enable cropping source picture.  8/25/2010
-  // FALSE: Streaming Video Sharing; TRUE: Video Conferencing Meeting;
+  // false: Streaming Video Sharing; true: Video Conferencing Meeting;
   bool     bEnableLongTermReference; // 0: on, 1: off
   int     iLtrMarkPeriod;
 
--- a/codec/common/WelsThreadLib.cpp
+++ b/codec/common/WelsThreadLib.cpp
@@ -268,7 +268,7 @@
   return sem_destroy (event);	// match with sem_init
 }
 
-WELS_THREAD_ERROR_CODE    WelsEventOpen (WELS_EVENT** p_event, str_t* event_name) {
+WELS_THREAD_ERROR_CODE    WelsEventOpen (WELS_EVENT** p_event, char* event_name) {
   if (p_event == NULL || event_name == NULL)
     return WELS_THREAD_ERROR_GENERAL;
   *p_event = sem_open (event_name, O_CREAT, (S_IRUSR | S_IWUSR)/*0600*/, 0);
@@ -280,7 +280,7 @@
     return WELS_THREAD_ERROR_OK;
   }
 }
-WELS_THREAD_ERROR_CODE    WelsEventClose (WELS_EVENT* event, str_t* event_name) {
+WELS_THREAD_ERROR_CODE    WelsEventClose (WELS_EVENT* event, char* event_name) {
   WELS_THREAD_ERROR_CODE err = sem_close (event);	// match with sem_open
   if (event_name)
     sem_unlink (event_name);
--- a/codec/common/WelsThreadLib.h
+++ b/codec/common/WelsThreadLib.h
@@ -110,8 +110,8 @@
 WELS_THREAD_ERROR_CODE    WelsMutexDestroy (WELS_MUTEX* mutex);
 
 #ifdef __GNUC__
-WELS_THREAD_ERROR_CODE    WelsEventOpen (WELS_EVENT** p_event, str_t* event_name);
-WELS_THREAD_ERROR_CODE    WelsEventClose (WELS_EVENT* event, str_t* event_name);
+WELS_THREAD_ERROR_CODE    WelsEventOpen (WELS_EVENT** p_event, char* event_name);
+WELS_THREAD_ERROR_CODE    WelsEventClose (WELS_EVENT* event, char* event_name);
 #endif//__GNUC__
 WELS_THREAD_ERROR_CODE    WelsEventInit (WELS_EVENT* event);
 WELS_THREAD_ERROR_CODE    WelsEventDestroy (WELS_EVENT* event);
--- a/codec/common/cpu.cpp
+++ b/codec/common/cpu.cpp
@@ -92,8 +92,8 @@
     /* CMOV instruction checking */
     uiCPU |= WELS_CPU_CMOV;
   }
-  if ((!strcmp ((const str_t*)chVendorName, CPU_Vendor_INTEL)) ||
-      (!strcmp((const str_t*)chVendorName, CPU_Vendor_AMD)) ) {	// confirmed_safe_unsafe_usage
+  if ((!strcmp ((const char*)chVendorName, CPU_Vendor_INTEL)) ||
+      (!strcmp((const char*)chVendorName, CPU_Vendor_AMD)) ) {	// confirmed_safe_unsafe_usage
     if (uiFeatureD & 0x10000000) {
       /* Multi-Threading checking: contains of multiple logic processors */
       uiCPU |= WELS_CPU_HTT;
@@ -139,7 +139,7 @@
     } else {
       *pNumberOfLogicProcessors = 1;
     }
-    if( !strcmp((const str_t*)chVendorName, CPU_Vendor_INTEL) ){
+    if( !strcmp((const char*)chVendorName, CPU_Vendor_INTEL) ){
       if( uiMaxCpuidLevel >= 4 ){
         uiFeatureC = 0;
         WelsCPUId(0x4, &uiFeatureA, &uiFeatureB, &uiFeatureC, &uiFeatureD);
@@ -152,7 +152,7 @@
 
   WelsCPUId (0x80000000, &uiFeatureA, &uiFeatureB, &uiFeatureC, &uiFeatureD);
 
-  if ((!strcmp ((const str_t*)chVendorName, CPU_Vendor_AMD))
+  if ((!strcmp ((const char*)chVendorName, CPU_Vendor_AMD))
       && (uiFeatureA >= 0x80000001)) {	// confirmed_safe_unsafe_usage
     WelsCPUId (0x80000001, &uiFeatureA, &uiFeatureB, &uiFeatureC, &uiFeatureD);
     if (uiFeatureD & 0x00400000) {
@@ -163,7 +163,7 @@
     }
   }
 
-  if (!strcmp ((const str_t*)chVendorName, CPU_Vendor_INTEL)) {	// confirmed_safe_unsafe_usage
+  if (!strcmp ((const char*)chVendorName, CPU_Vendor_INTEL)) {	// confirmed_safe_unsafe_usage
     int32_t  family, model;
 
     WelsCPUId (1, &uiFeatureA, &uiFeatureB, &uiFeatureC, &uiFeatureD);
@@ -176,8 +176,8 @@
   }
 
   // get cache line size
-  if ((!strcmp ((const str_t*)chVendorName, CPU_Vendor_INTEL))
-      || ! (strcmp ((const str_t*)chVendorName, CPU_Vendor_CYRIX))) {	// confirmed_safe_unsafe_usage
+  if ((!strcmp ((const char*)chVendorName, CPU_Vendor_INTEL))
+      || ! (strcmp ((const char*)chVendorName, CPU_Vendor_CYRIX))) {	// confirmed_safe_unsafe_usage
     WelsCPUId (1, &uiFeatureA, &uiFeatureB, &uiFeatureC, &uiFeatureD);
 
     CacheLineSize = (uiFeatureB & 0xff00) >>
--- a/codec/common/cpu.h
+++ b/codec/common/cpu.h
@@ -55,12 +55,12 @@
  */
 int32_t  WelsCPUIdVerify();
 
-void_t WelsCPUId (uint32_t uiIndex, uint32_t* pFeatureA, uint32_t* pFeatureB, uint32_t* pFeatureC, uint32_t* pFeatureD);
+void WelsCPUId (uint32_t uiIndex, uint32_t* pFeatureA, uint32_t* pFeatureB, uint32_t* pFeatureC, uint32_t* pFeatureD);
 
 int32_t WelsCPUSupportAVX (uint32_t eax, uint32_t ecx);
 int32_t WelsCPUSupportFMA (uint32_t eax, uint32_t ecx);
 
-void_t WelsEmms();
+void WelsEmms();
 
 uint32_t WelsCPUFeatureDetect (int32_t* pNumberOfLogicProcessors);
 
--- a/codec/common/crt_util_safe_x.cpp
+++ b/codec/common/crt_util_safe_x.cpp
@@ -61,7 +61,7 @@
 
 #if  defined(_MSC_VER) && (_MSC_VER>=1500)
 
-int32_t WelsSnprintf (str_t* pBuffer,  int32_t iSizeOfBuffer, const str_t* kpFormat, ...) {
+int32_t WelsSnprintf (char* pBuffer,  int32_t iSizeOfBuffer, const char* kpFormat, ...) {
   va_list  pArgPtr;
   int32_t  iRc;
 
@@ -74,17 +74,17 @@
   return iRc;
 }
 
-str_t* WelsStrncpy (str_t* pDest, int32_t iSizeInBytes, const str_t* kpSrc) {
+char* WelsStrncpy (char* pDest, int32_t iSizeInBytes, const char* kpSrc) {
   strncpy_s (pDest, iSizeInBytes, kpSrc, _TRUNCATE);
 
   return pDest;
 }
 
-int32_t WelsVsnprintf (str_t* pBuffer, int32_t iSizeOfBuffer, const str_t* kpFormat, va_list pArgPtr) {
+int32_t WelsVsnprintf (char* pBuffer, int32_t iSizeOfBuffer, const char* kpFormat, va_list pArgPtr) {
   return vsnprintf_s (pBuffer, iSizeOfBuffer, _TRUNCATE, kpFormat, pArgPtr);
 }
 
-WelsFileHandle* WelsFopen (const str_t* kpFilename,  const str_t* kpMode) {
+WelsFileHandle* WelsFopen (const char* kpFilename,  const char* kpMode) {
   WelsFileHandle* pFp = NULL;
   if (fopen_s (&pFp, kpFilename, kpMode) != 0) {
     return NULL;
@@ -101,7 +101,7 @@
   return _ftime_s (pTp);
 }
 
-int32_t WelsStrftime (str_t* pBuffer, int32_t iSize, const str_t* kpFormat, const SWelsTime* kpTp) {
+int32_t WelsStrftime (char* pBuffer, int32_t iSize, const char* kpFormat, const SWelsTime* kpTp) {
   struct tm   sTimeNow;
   int32_t iRc;
 
@@ -115,7 +115,7 @@
 
 #else
 
-int32_t WelsSnprintf (str_t* pBuffer,  int32_t iSizeOfBuffer, const str_t* kpFormat, ...) {
+int32_t WelsSnprintf (char* pBuffer,  int32_t iSizeOfBuffer, const char* kpFormat, ...) {
   va_list pArgPtr;
   int32_t iRc;
 
@@ -130,7 +130,7 @@
   return iRc;
 }
 
-str_t* WelsStrncpy (str_t* pDest, int32_t iSizeInBytes, const str_t* kpSrc) {
+char* WelsStrncpy (char* pDest, int32_t iSizeInBytes, const char* kpSrc) {
   strncpy (pDest, kpSrc, iSizeInBytes); //confirmed_safe_unsafe_usage
   pDest[iSizeInBytes - 1] = '\0';
 
@@ -137,7 +137,7 @@
   return pDest;
 }
 
-int32_t WelsVsnprintf (str_t* pBuffer, int32_t iSizeOfBuffer, const str_t* kpFormat, va_list pArgPtr) {
+int32_t WelsVsnprintf (char* pBuffer, int32_t iSizeOfBuffer, const char* kpFormat, va_list pArgPtr) {
   int32_t iRc = vsnprintf (pBuffer, iSizeOfBuffer, kpFormat, pArgPtr); //confirmed_safe_unsafe_usage
   if (iRc < 0)
     pBuffer[iSizeOfBuffer - 1] = '\0';
@@ -145,7 +145,7 @@
 }
 
 
-WelsFileHandle* WelsFopen (const str_t* kpFilename,  const str_t* kpMode) {
+WelsFileHandle* WelsFopen (const char* kpFilename,  const char* kpMode) {
   return fopen (kpFilename, kpMode);
 }
 
@@ -158,7 +158,7 @@
   return 0;
 }
 
-int32_t WelsStrftime (str_t* pBuffer, int32_t iSize, const str_t* kpFormat, const SWelsTime* kpTp) {
+int32_t WelsStrftime (char* pBuffer, int32_t iSize, const char* kpFormat, const SWelsTime* kpTp) {
   struct tm*   pTnow;
   int32_t iRc;
 
@@ -175,7 +175,7 @@
 
 #else  //GCC
 
-int32_t WelsSnprintf (str_t* pBuffer,  int32_t iSizeOfBuffer, const str_t* kpFormat, ...) {
+int32_t WelsSnprintf (char* pBuffer,  int32_t iSizeOfBuffer, const char* kpFormat, ...) {
   va_list pArgPtr;
   int32_t iRc;
 
@@ -188,17 +188,17 @@
   return iRc;
 }
 
-str_t* WelsStrncpy (str_t* pDest, int32_t iSizeInBytes, const str_t* kpSrc) {
+char* WelsStrncpy (char* pDest, int32_t iSizeInBytes, const char* kpSrc) {
   strncpy (pDest, kpSrc, iSizeInBytes); //confirmed_safe_unsafe_usage
   pDest[iSizeInBytes - 1] = '\0';
   return pDest;
 }
 
-int32_t WelsVsnprintf (str_t* pBuffer, int32_t iSizeOfBuffer, const str_t* kpFormat, va_list pArgPtr) {
+int32_t WelsVsnprintf (char* pBuffer, int32_t iSizeOfBuffer, const char* kpFormat, va_list pArgPtr) {
   return vsnprintf (pBuffer, iSizeOfBuffer, kpFormat, pArgPtr); //confirmed_safe_unsafe_usage
 }
 
-WelsFileHandle* WelsFopen (const str_t* kpFilename,  const str_t* kpMode) {
+WelsFileHandle* WelsFopen (const char* kpFilename,  const char* kpMode) {
   return fopen (kpFilename, kpMode);
 }
 
@@ -219,7 +219,7 @@
   return 0;
 }
 
-int32_t WelsStrftime (str_t* pBuffer, int32_t iSize, const str_t* kpFormat, const SWelsTime* kpTp) {
+int32_t WelsStrftime (char* pBuffer, int32_t iSize, const char* kpFormat, const SWelsTime* kpTp) {
   struct tm*   pTnow;
   int32_t iRc;
 
@@ -234,12 +234,12 @@
 #endif
 
 
-str_t* WelsStrcat (str_t* pDest, int32_t iSizeInBytes, const str_t* kpSrc) {
+char* WelsStrcat (char* pDest, int32_t iSizeInBytes, const char* kpSrc) {
     int32_t iCurLen = strlen(pDest);
     return WelsStrncpy(pDest + iCurLen, iSizeInBytes - iCurLen, kpSrc);
 }
 
-int32_t WelsFwrite (const void_t* kpBuffer, int32_t iSize, int32_t iCount, WelsFileHandle* pFp) {
+int32_t WelsFwrite (const void* kpBuffer, int32_t iSize, int32_t iCount, WelsFileHandle* pFp) {
   return fwrite (kpBuffer, iSize, iCount, pFp);
 }
 
--- a/codec/common/crt_util_safe_x.h
+++ b/codec/common/crt_util_safe_x.h
@@ -75,12 +75,12 @@
 typedef      struct timeb      SWelsTime;
 #endif
 
-int32_t   WelsSnprintf (str_t* buffer,  int32_t sizeOfBuffer,  const str_t* format, ...);
-str_t*   WelsStrncpy (str_t* dest, int32_t sizeInBytes, const str_t* src);
-str_t*   WelsStrcat (str_t* dest, int32_t sizeInBytes, const str_t* src);
-int32_t   WelsVsnprintf (str_t* buffer, int32_t sizeOfBuffer, const str_t* format, va_list argptr);
+int32_t   WelsSnprintf (char* buffer,  int32_t sizeOfBuffer,  const char* format, ...);
+char*   WelsStrncpy (char* dest, int32_t sizeInBytes, const char* src);
+char*   WelsStrcat (char* dest, int32_t sizeInBytes, const char* src);
+int32_t   WelsVsnprintf (char* buffer, int32_t sizeOfBuffer, const char* format, va_list argptr);
 
-WelsFileHandle*        WelsFopen (const str_t* filename,  const str_t* mode);
+WelsFileHandle*        WelsFopen (const char* filename,  const char* mode);
 int32_t                WelsFclose (WelsFileHandle*   fp);
 int32_t                WelsFread (void* buffer, int32_t size, int32_t count, WelsFileHandle* fp);
 int32_t                WelsFwrite (const void* buffer, int32_t size, int32_t count, WelsFileHandle* fp);
@@ -88,7 +88,7 @@
 int32_t                WelsFflush (WelsFileHandle* fp);
 
 int32_t                WelsGetTimeOfDay (SWelsTime* tp);
-int32_t                WelsStrftime (str_t* buffer, int32_t size, const str_t* format, const SWelsTime* tp);
+int32_t                WelsStrftime (char* buffer, int32_t size, const char* format, const SWelsTime* tp);
 uint16_t               WelsGetMillisecond (const SWelsTime* tp);
 
 
--- a/codec/common/deblocking_common.cpp
+++ b/codec/common/deblocking_common.cpp
@@ -1,7 +1,7 @@
 #include "deblocking_common.h"
 #include "macros.h"
 //  C code only
-void_t DeblockLumaLt4_c (uint8_t* pPix, int32_t iStrideX, int32_t iStrideY, int32_t iAlpha, int32_t iBeta,
+void DeblockLumaLt4_c (uint8_t* pPix, int32_t iStrideX, int32_t iStrideY, int32_t iAlpha, int32_t iBeta,
                          int8_t* pTc) {
   for (int32_t i = 0; i < 16; i++) {
     int32_t iTc0 = pTc[i >> 2];
@@ -12,13 +12,13 @@
       int32_t q0 = pPix[0];
       int32_t q1 = pPix[iStrideX];
       int32_t q2 = pPix[2 * iStrideX];
-      bool_t bDetaP0Q0 = WELS_ABS (p0 - q0) < iAlpha;
-      bool_t bDetaP1P0 = WELS_ABS (p1 - p0) < iBeta;
-      bool_t bDetaQ1Q0 = WELS_ABS (q1 - q0) < iBeta;
+      bool bDetaP0Q0 = WELS_ABS (p0 - q0) < iAlpha;
+      bool bDetaP1P0 = WELS_ABS (p1 - p0) < iBeta;
+      bool bDetaQ1Q0 = WELS_ABS (q1 - q0) < iBeta;
       int32_t iTc = iTc0;
       if (bDetaP0Q0 && bDetaP1P0 && bDetaQ1Q0) {
-        bool_t bDetaP2P0 =  WELS_ABS (p2 - p0) < iBeta;
-        bool_t bDetaQ2Q0 =  WELS_ABS (q2 - q0) < iBeta;
+        bool bDetaP2P0 =  WELS_ABS (p2 - p0) < iBeta;
+        bool bDetaQ2Q0 =  WELS_ABS (q2 - q0) < iBeta;
         if (bDetaP2P0) {
           pPix[-2 * iStrideX] = p1 + WELS_CLIP3 ((p2 + ((p0 + q0 + 1) >> 1) - (p1 << 1)) >> 1, -iTc0, iTc0);
           iTc++;
@@ -35,10 +35,10 @@
     pPix += iStrideY;
   }
 }
-void_t DeblockLumaEq4_c (uint8_t* pPix, int32_t iStrideX, int32_t iStrideY, int32_t iAlpha, int32_t iBeta) {
+void DeblockLumaEq4_c (uint8_t* pPix, int32_t iStrideX, int32_t iStrideY, int32_t iAlpha, int32_t iBeta) {
   int32_t p0, p1, p2, q0, q1, q2;
   int32_t iDetaP0Q0;
-  bool_t bDetaP1P0, bDetaQ1Q0;
+  bool bDetaP1P0, bDetaQ1Q0;
   for (int32_t i = 0; i < 16; i++) {
     p0 = pPix[-iStrideX];
     p1 = pPix[-2 * iStrideX];
@@ -51,8 +51,8 @@
     bDetaQ1Q0 = WELS_ABS (q1 - q0) < iBeta;
     if ((iDetaP0Q0 < iAlpha) && bDetaP1P0 && bDetaQ1Q0) {
       if (iDetaP0Q0 < ((iAlpha >> 2) + 2)) {
-        bool_t bDetaP2P0 = WELS_ABS (p2 - p0) < iBeta;
-        bool_t bDetaQ2Q0 =  WELS_ABS (q2 - q0) < iBeta;
+        bool bDetaP2P0 = WELS_ABS (p2 - p0) < iBeta;
+        bool bDetaQ2Q0 =  WELS_ABS (q2 - q0) < iBeta;
         if (bDetaP2P0) {
           const int32_t p3 = pPix[-4 * iStrideX];
           pPix[-iStrideX] = (p2 + (p1 << 1) + (p0 << 1) + (q0 << 1) + q1 + 4) >> 3;	   //p0
@@ -77,22 +77,22 @@
     pPix += iStrideY;
   }
 }
-void_t DeblockLumaLt4V_c (uint8_t* pPix, int32_t iStride, int32_t iAlpha, int32_t iBeta, int8_t* tc) {
+void DeblockLumaLt4V_c (uint8_t* pPix, int32_t iStride, int32_t iAlpha, int32_t iBeta, int8_t* tc) {
   DeblockLumaLt4_c (pPix, iStride, 1, iAlpha, iBeta, tc);
 }
-void_t DeblockLumaLt4H_c (uint8_t* pPix, int32_t iStride, int32_t iAlpha, int32_t iBeta, int8_t* tc) {
+void DeblockLumaLt4H_c (uint8_t* pPix, int32_t iStride, int32_t iAlpha, int32_t iBeta, int8_t* tc) {
   DeblockLumaLt4_c (pPix, 1, iStride, iAlpha, iBeta, tc);
 }
-void_t DeblockLumaEq4V_c (uint8_t* pPix, int32_t iStride, int32_t iAlpha, int32_t iBeta) {
+void DeblockLumaEq4V_c (uint8_t* pPix, int32_t iStride, int32_t iAlpha, int32_t iBeta) {
   DeblockLumaEq4_c (pPix, iStride, 1, iAlpha, iBeta);
 }
-void_t DeblockLumaEq4H_c (uint8_t* pPix, int32_t iStride, int32_t iAlpha, int32_t iBeta) {
+void DeblockLumaEq4H_c (uint8_t* pPix, int32_t iStride, int32_t iAlpha, int32_t iBeta) {
   DeblockLumaEq4_c (pPix, 1, iStride, iAlpha, iBeta);
 }
-void_t DeblockChromaLt4_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStrideX, int32_t iStrideY, int32_t iAlpha,
+void DeblockChromaLt4_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStrideX, int32_t iStrideY, int32_t iAlpha,
                            int32_t iBeta, int8_t* pTc) {
   int32_t p0, p1, q0, q1, iDeta;
-  bool_t bDetaP0Q0, bDetaP1P0, bDetaQ1Q0;
+  bool bDetaP0Q0, bDetaP1P0, bDetaQ1Q0;
 
   for (int32_t i = 0; i < 8; i++) {
     int32_t iTc0 = pTc[i >> 1];
@@ -131,10 +131,10 @@
     pPixCr += iStrideY;
   }
 }
-void_t DeblockChromaEq4_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStrideX, int32_t iStrideY, int32_t iAlpha,
+void DeblockChromaEq4_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStrideX, int32_t iStrideY, int32_t iAlpha,
                            int32_t iBeta) {
   int32_t p0, p1, q0, q1;
-  bool_t bDetaP0Q0, bDetaP1P0, bDetaQ1Q0;
+  bool bDetaP0Q0, bDetaP1P0, bDetaQ1Q0;
   for (int32_t i = 0; i < 8; i++) {
     //cb
     p0 = pPixCb[-iStrideX];
@@ -165,18 +165,18 @@
     pPixCb += iStrideY;
   }
 }
-void_t DeblockChromaLt4V_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride, int32_t iAlpha, int32_t iBeta,
+void DeblockChromaLt4V_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride, int32_t iAlpha, int32_t iBeta,
                             int8_t* tc) {
   DeblockChromaLt4_c (pPixCb, pPixCr, iStride, 1, iAlpha, iBeta, tc);
 }
-void_t DeblockChromaLt4H_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride, int32_t iAlpha, int32_t iBeta,
+void DeblockChromaLt4H_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride, int32_t iAlpha, int32_t iBeta,
                             int8_t* tc) {
   DeblockChromaLt4_c (pPixCb, pPixCr, 1, iStride, iAlpha, iBeta, tc);
 }
-void_t DeblockChromaEq4V_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride, int32_t iAlpha, int32_t iBeta) {
+void DeblockChromaEq4V_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride, int32_t iAlpha, int32_t iBeta) {
   DeblockChromaEq4_c (pPixCb, pPixCr, iStride, 1, iAlpha, iBeta);
 }
-void_t DeblockChromaEq4H_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride, int32_t iAlpha, int32_t iBeta) {
+void DeblockChromaEq4H_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride, int32_t iAlpha, int32_t iBeta) {
   DeblockChromaEq4_c (pPixCb, pPixCr, 1, iStride, iAlpha, iBeta);
 }
 
--- a/codec/common/deblocking_common.h
+++ b/codec/common/deblocking_common.h
@@ -1,19 +1,19 @@
 #ifndef WELS_DEBLOCKING_COMMON_H__
 #define WELS_DEBLOCKING_COMMON_H__
 #include "typedefs.h"
-void_t DeblockLumaLt4V_c (uint8_t* pPixY, int32_t iStride, int32_t iAlpha, int32_t iBeta, int8_t* pTc);
-void_t DeblockLumaEq4V_c (uint8_t* pPixY, int32_t iStride, int32_t iAlpha, int32_t iBeta);
+void DeblockLumaLt4V_c (uint8_t* pPixY, int32_t iStride, int32_t iAlpha, int32_t iBeta, int8_t* pTc);
+void DeblockLumaEq4V_c (uint8_t* pPixY, int32_t iStride, int32_t iAlpha, int32_t iBeta);
 
-void_t DeblockLumaLt4H_c (uint8_t* pPixY, int32_t iStride, int32_t iAlpha, int32_t iBeta, int8_t* pTc);
-void_t DeblockLumaEq4H_c (uint8_t* pPixY, int32_t iStride, int32_t iAlpha, int32_t iBeta);
+void DeblockLumaLt4H_c (uint8_t* pPixY, int32_t iStride, int32_t iAlpha, int32_t iBeta, int8_t* pTc);
+void DeblockLumaEq4H_c (uint8_t* pPixY, int32_t iStride, int32_t iAlpha, int32_t iBeta);
 
-void_t DeblockChromaLt4V_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride, int32_t iAlpha, int32_t iBeta,
+void DeblockChromaLt4V_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride, int32_t iAlpha, int32_t iBeta,
                             int8_t* pTc);
-void_t DeblockChromaEq4V_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride, int32_t iAlpha, int32_t iBeta);
+void DeblockChromaEq4V_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride, int32_t iAlpha, int32_t iBeta);
 
-void_t DeblockChromaLt4H_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride, int32_t iAlpha, int32_t iBeta,
+void DeblockChromaLt4H_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride, int32_t iAlpha, int32_t iBeta,
                             int8_t* pTc);
-void_t DeblockChromaEq4H_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride, int32_t iAlpha, int32_t iBeta);
+void DeblockChromaEq4H_c (uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride, int32_t iAlpha, int32_t iBeta);
 
 #if defined(__cplusplus)
 extern "C" {
--- a/codec/common/logging.cpp
+++ b/codec/common/logging.cpp
@@ -41,7 +41,7 @@
   g_TraceLevel = level;
 }
 
-int32_t welsStderrLevelTrace (int32_t level, const str_t* format, va_list ap) {
+int32_t welsStderrLevelTrace (int32_t level, const char* format, va_list ap) {
   if (level < g_TraceLevel) {
     vfprintf (stderr, format, ap);
   }
--- a/codec/common/logging.h
+++ b/codec/common/logging.h
@@ -40,10 +40,10 @@
 
 
 // Internal details.
-int32_t welsStderrLevelTrace (int32_t level, const str_t* format, va_list ap);
+int32_t welsStderrLevelTrace (int32_t level, const char* format, va_list ap);
 
 template<int level> int32_t welsStderrTrace (
-  const str_t* format, ...) {
+  const char* format, ...) {
   va_list ap;
   va_start (ap, format);
   welsStderrLevelTrace (level, format, ap);
--- a/codec/common/ls_defines.h
+++ b/codec/common/ls_defines.h
@@ -57,9 +57,9 @@
 #define ST32(a, b) (((struct tagUnaligned_32 *) (a))->l) = (b)
 #define ST64(a, b) (((struct tagUnaligned_64 *) (a))->l) = (b)
 //	#else
-//		inline void_t __ST16(void_t *dst, uint16_t v) { memcpy(dst, &v, 2); }
-//		inline void_t __ST32(void_t *dst, uint32_t v) { memcpy(dst, &v, 4); }
-//inline void_t __ST64(void_t *dst, uint64_t v) { memcpy(dst, &v, 8); }
+//		inline void __ST16(void *dst, uint16_t v) { memcpy(dst, &v, 2); }
+//		inline void __ST32(void *dst, uint32_t v) { memcpy(dst, &v, 4); }
+//inline void __ST64(void *dst, uint64_t v) { memcpy(dst, &v, 8); }
 //	#endif
 
 #else
--- a/codec/common/macros.h
+++ b/codec/common/macros.h
@@ -248,7 +248,7 @@
 #define BUTTERFLY4x8(dw) (((uint64_t)(dw)<<32) | (dw))
 #endif//BUTTERFLY4x8
 
-static inline BOOL_T WELS_POWER2_IF (uint32_t v) {
+static inline bool WELS_POWER2_IF (uint32_t v) {
 return (v && ! (v & (v - 1)));
 }
 
--- a/codec/common/mb_copy.asm
+++ b/codec/common/mb_copy.asm
@@ -432,7 +432,7 @@
 
 ALIGN 16
 ;*******************************************************************************
-; void_t PixelAvgWidthEq4_mmx( uint8_t *pDst,  int iDstStride,
+; void PixelAvgWidthEq4_mmx( uint8_t *pDst,  int iDstStride,
 ;                           uint8_t *pSrcA, int iSrcAStride,
 ;                           uint8_t *pSrcB, int iSrcBStride,
 ;                           int iHeight );
@@ -468,7 +468,7 @@
 
 ALIGN 16
 ;*******************************************************************************
-; void_t PixelAvgWidthEq8_mmx( uint8_t *pDst,  int iDstStride,
+; void PixelAvgWidthEq8_mmx( uint8_t *pDst,  int iDstStride,
 ;                           uint8_t *pSrcA, int iSrcAStride,
 ;                           uint8_t *pSrcB, int iSrcBStride,
 ;                           int iHeight );
@@ -522,7 +522,7 @@
 
 ALIGN 16
 ;*******************************************************************************
-; void_t PixelAvgWidthEq16_sse2( uint8_t *pDst,  int iDstStride,
+; void PixelAvgWidthEq16_sse2( uint8_t *pDst,  int iDstStride,
 ;                          uint8_t *pSrcA, int iSrcAStride,
 ;                          uint8_t *pSrcB, int iSrcBStride,
 ;                          int iHeight );
@@ -577,7 +577,7 @@
 
 ALIGN 16
 ;*******************************************************************************
-;  void_t McCopyWidthEq4_mmx( uint8_t *pSrc, int iSrcStride,
+;  void McCopyWidthEq4_mmx( uint8_t *pSrc, int iSrcStride,
 ;                          uint8_t *pDst, int iDstStride, int iHeight )
 ;*******************************************************************************
 McCopyWidthEq4_mmx:
@@ -618,7 +618,7 @@
 
 ALIGN 16
 ;*******************************************************************************
-;   void_t McCopyWidthEq8_mmx( uint8_t *pSrc, int iSrcStride,
+;   void McCopyWidthEq8_mmx( uint8_t *pSrc, int iSrcStride,
 ;                           uint8_t *pDst, int iDstStride, int iHeight )
 ;*******************************************************************************
 McCopyWidthEq8_mmx:
@@ -655,7 +655,7 @@
 
 ALIGN 16
 ;*******************************************************************************
-;   void_t McCopyWidthEq16_sse2( uint8_t *pSrc, int iSrcStride, uint8_t *pDst, int iDstStride, int iHeight )
+;   void McCopyWidthEq16_sse2( uint8_t *pSrc, int iSrcStride, uint8_t *pDst, int iDstStride, int iHeight )
 ;*******************************************************************************
 ;read unaligned memory
 %macro SSE_READ_UNA 2
--- a/codec/common/mc_luma.asm
+++ b/codec/common/mc_luma.asm
@@ -76,7 +76,7 @@
 
 ALIGN 16
 ;*******************************************************************************
-; void_t McHorVer20WidthEq4_mmx( uint8_t *pSrc,
+; void McHorVer20WidthEq4_mmx( uint8_t *pSrc,
 ;                       int iSrcStride,
 ;						uint8_t *pDst,
 ;						int iDstStride,
@@ -179,7 +179,7 @@
 
 ALIGN 16
 ;***********************************************************************
-; void_t McHorVer22Width8HorFirst_sse2(int16_t *pSrc,
+; void McHorVer22Width8HorFirst_sse2(int16_t *pSrc,
 ;                       int16_t iSrcStride,
 ;						uint8_t *pDst,
 ;						int32_t iDstStride
@@ -241,7 +241,7 @@
 
 ALIGN 16
 ;*******************************************************************************
-; void_t McHorVer20WidthEq8_sse2(  uint8_t *pSrc,
+; void McHorVer20WidthEq8_sse2(  uint8_t *pSrc,
 ;                       int iSrcStride,
 ;												uint8_t *pDst,
 ;												int iDstStride,
@@ -307,7 +307,7 @@
 
 ALIGN 16
 ;*******************************************************************************
-; void_t McHorVer20WidthEq16_sse2(  uint8_t *pSrc,
+; void McHorVer20WidthEq16_sse2(  uint8_t *pSrc,
 ;                       int iSrcStride,
 ;												uint8_t *pDst,
 ;												int iDstStride,
@@ -398,7 +398,7 @@
 
 
 ;*******************************************************************************
-; void_t McHorVer02WidthEq8_sse2( uint8_t *pSrc,
+; void McHorVer02WidthEq8_sse2( uint8_t *pSrc,
 ;                       int iSrcStride,
 ;                       uint8_t *pDst,
 ;                       int iDstStride,
@@ -1290,4 +1290,4 @@
 	pop r12
 %endif
 	LOAD_6_PARA_POP
-	ret
\ No newline at end of file
+	ret
--- a/codec/common/measure_time.h
+++ b/codec/common/measure_time.h
@@ -57,11 +57,11 @@
 
 /*!
  * \brief	time cost measure utilization
- * \param	void_t
+ * \param	void
  * \return	time elapsed since run (unit: microsecond)
  */
 
-static inline int64_t WelsTime (void_t) {
+static inline int64_t WelsTime (void) {
 #ifndef _WIN32
   struct timeval tv_date;
 
--- a/codec/common/typedefs.h
+++ b/codec/common/typedefs.h
@@ -60,8 +60,6 @@
 
 #endif // _MSC_VER defined
 
-// FIXME:     all string type should be declared explicit as char.
-typedef char      str_t;
 // The 'float' type is portable and usable without any need for any extra typedefs.
 
 #ifdef EPSN
@@ -68,21 +66,6 @@
 #undef EPSN
 #endif//EPSN
 #define EPSN	  (0.000001f) // (1e-6)	// desired float precision
-
-typedef bool bool_t;
-typedef int32_t BOOL_T;
-
-#ifndef FALSE
-#define FALSE   ((int32_t)0)
-#endif//FALSE
-
-#ifndef TRUE
-#define TRUE    ((int32_t)1)
-#endif//TRUE
-
-#ifndef void_t
-#define void_t void
-#endif
 
 #endif //WELS_TYPE_DEFINES_H__
 
--- a/codec/console/dec/src/h264dec.cpp
+++ b/codec/console/dec/src/h264dec.cpp
@@ -57,8 +57,8 @@
 
 //#define STICK_STREAM_SIZE	// For Demo interfaces test with track file of integrated frames
 
-void_t H264DecodeInstance (ISVCDecoder* pDecoder, const char* kpH264FileName, const char* kpOuputFileName,
-                           int32_t& iWidth, int32_t& iHeight, void_t* pOptionFileName) {
+void H264DecodeInstance (ISVCDecoder* pDecoder, const char* kpH264FileName, const char* kpOuputFileName,
+                           int32_t& iWidth, int32_t& iHeight, void* pOptionFileName) {
   FILE* pH264File	  = NULL;
   FILE* pYuvFile	  = NULL;
   FILE* pOptionFile = NULL;
@@ -68,7 +68,7 @@
   uint8_t* pBuf = NULL;
   uint8_t uiStartCode[4] = {0, 0, 0, 1};
 
-  void_t* pData[3] = {NULL};
+  void* pData[3] = {NULL};
   uint8_t* pDst[3] = {NULL};
   SBufferInfo sDstBufInfo;
 
@@ -171,7 +171,7 @@
     if (iBufPos >= iFileSize) {
       iEndOfStreamFlag = true;
       if (iEndOfStreamFlag)
-        pDecoder->SetOption (DECODER_OPTION_END_OF_STREAM, (void_t*)&iEndOfStreamFlag);
+        pDecoder->SetOption (DECODER_OPTION_END_OF_STREAM, (void*)&iEndOfStreamFlag);
       break;
     }
 
@@ -228,7 +228,7 @@
     iTotal	+= iEnd - iStart;
     if (sDstBufInfo.iBufferStatus == 1) {
       iFrameNum++;
-      cOutputModule.Process ((void_t**)pDst, &sDstBufInfo, pYuvFile);
+      cOutputModule.Process ((void**)pDst, &sDstBufInfo, pYuvFile);
       if (sDstBufInfo.eBufferProperty == BUFFER_HOST) {
         iWidth  = sDstBufInfo.UsrData.sSystemBuffer.iWidth;
         iHeight = sDstBufInfo.UsrData.sSystemBuffer.iHeight;
@@ -267,7 +267,7 @@
   }
 
   if (sDstBufInfo.iBufferStatus == 1) {
-    cOutputModule.Process ((void_t**)pDst, &sDstBufInfo, pYuvFile);
+    cOutputModule.Process ((void**)pDst, &sDstBufInfo, pYuvFile);
     if (sDstBufInfo.eBufferProperty == BUFFER_HOST) {
       iWidth  = sDstBufInfo.UsrData.sSystemBuffer.iWidth;
       iHeight = sDstBufInfo.UsrData.sSystemBuffer.iHeight;
@@ -446,7 +446,7 @@
 
 
   H264DecodeInstance (pDecoder, strInputFile.c_str(), strOutputFile.c_str(), iWidth, iHeight,
-                      (!strOptionFile.empty() ? (void_t*) (const_cast<char*> (strOptionFile.c_str())) : NULL));
+                      (!strOptionFile.empty() ? (void*) (const_cast<char*> (strOptionFile.c_str())) : NULL));
 
   if (sDecParam.pFileNameRestructed != NULL) {
     delete []sDecParam.pFileNameRestructed;
--- a/codec/console/enc/src/welsenc.cpp
+++ b/codec/console/enc/src/welsenc.cpp
@@ -255,7 +255,7 @@
 
     while (!cRdLayerCfg.EndOfFile()) {
       long iLayerRd = cRdLayerCfg.ReadLine (&strTag[0]);
-      bool_t bFound = false;
+      bool bFound = false;
       if (iLayerRd > 0) {
         if (strTag[0].empty())
           continue;
@@ -283,7 +283,7 @@
         } else if (strTag[0].compare ("ProfileIdc") == 0) {
           pDLayer->uiProfileIdc	= atoi (strTag[1].c_str());
         } else if (strTag[0].compare ("FRExt") == 0) {
-//					pDLayer->frext_mode	= (bool_t)atoi(strTag[1].c_str());
+//					pDLayer->frext_mode	= (bool)atoi(strTag[1].c_str());
         } else if (strTag[0].compare ("SpatialBitrate") == 0) {
           pDLayer->iSpatialBitrate	= 1000 * atoi (strTag[1].c_str());
           if (pSvcParam.bEnableRc && pDLayer->iSpatialBitrate <= 0) {
@@ -523,7 +523,7 @@
             } else if (strTag[0].compare ("ProfileIdc") == 0) {
               pDLayer->uiProfileIdc	= atoi (strTag[1].c_str());
             } else if (strTag[0].compare ("FRExt") == 0) {
-//							pDLayer->frext_mode	= (bool_t)atoi(strTag[1].c_str());
+//							pDLayer->frext_mode	= (bool)atoi(strTag[1].c_str());
             } else if (strTag[0].compare ("SpatialBitrate") == 0) {
               pDLayer->iSpatialBitrate	= 1000 * atoi (strTag[1].c_str());
             } else if (strTag[0].compare ("InitialQP") == 0) {
@@ -1040,8 +1040,8 @@
   iFrameIdx = 0;
   while (iFrameIdx < iTotalFrameMax && (((int32_t)sSvcParam.uiFrameToBeCoded <= 0)
                                         || (iFrameIdx < (int32_t)sSvcParam.uiFrameToBeCoded))) {
-    bool_t bOnePicAvailableAtLeast = false;
-    bool_t bSomeSpatialUnavailable	  = false;
+    bool bOnePicAvailableAtLeast = false;
+    bool bSomeSpatialUnavailable	  = false;
 
 #ifdef ONLY_ENC_FRAMES_NUM
     // Only encoded some limited frames here
@@ -1057,7 +1057,7 @@
       const int kiPicResSize = ((pDLayer->iActualWidth * pDLayer->iActualHeight) * 3) >> 1;
       uint32_t uiSkipIdx = (1 << pDLayer->iTemporalResolution);
 
-      bool_t bCanBeRead = false;
+      bool bCanBeRead = false;
 
       if (iFrameIdx % uiSkipIdx == 0) {	// such layer is enabled to encode indeed
         bCanBeRead = (fread (pYUV[iDlayerIdx], 1, kiPicResSize, pFileYUV[iDlayerIdx]) == kiPicResSize);
--- a/codec/decoder/core/asm/block_add.asm
+++ b/codec/decoder/core/asm/block_add.asm
@@ -53,7 +53,7 @@
 
 ALIGN    16
 ;*******************************************************************************
-;  void_t WelsResBlockZero16x16_sse2(int16_t* pBlock,int32_t iStride)
+;  void WelsResBlockZero16x16_sse2(int16_t* pBlock,int32_t iStride)
 ;*******************************************************************************
 WelsResBlockZero16x16_sse2:
         ;push     r0
@@ -134,7 +134,7 @@
 
 ALIGN    16
 ;*******************************************************************************
-;  void_t WelsResBlockZero8x8_sse2(int16_t * pBlock, int32_t iStride)
+;  void WelsResBlockZero8x8_sse2(int16_t * pBlock, int32_t iStride)
 ;*******************************************************************************
 WelsResBlockZero8x8_sse2:
 	  ;push      r0
--- a/codec/decoder/core/asm/dct.asm
+++ b/codec/decoder/core/asm/dct.asm
@@ -87,7 +87,7 @@
 
 ALIGN 16
 ;*******************************************************************************
-;   void_t __cdecl IdctResAddPred_mmx( uint8_t *pPred, const int32_t kiStride, int16_t *pRs )
+;   void __cdecl IdctResAddPred_mmx( uint8_t *pPred, const int32_t kiStride, int16_t *pRs )
 ;*******************************************************************************
 
 IdctResAddPred_mmx:
--- a/codec/decoder/core/asm/intra_pred.asm
+++ b/codec/decoder/core/asm/intra_pred.asm
@@ -184,7 +184,7 @@
 
 ALIGN 16
 ;*******************************************************************************
-;   void_t __cdecl WelsDecoderI4x4LumaPredH_sse2(uint8_t *pPred, const int32_t kiStride)
+;   void __cdecl WelsDecoderI4x4LumaPredH_sse2(uint8_t *pPred, const int32_t kiStride)
 ;
 ;	pPred must align to 16
 ;*******************************************************************************
@@ -224,7 +224,7 @@
 	ret
 
 ;*******************************************************************************
-; void_t WelsDecoderI16x16LumaPredPlane_sse2(uint8_t *pPred, const int32_t kiStride);
+; void WelsDecoderI16x16LumaPredPlane_sse2(uint8_t *pPred, const int32_t kiStride);
 ;*******************************************************************************
 WelsDecoderI16x16LumaPredPlane_sse2:
 		;%define pushsize	4
@@ -325,7 +325,7 @@
 
 
 ;*******************************************************************************
-; void_t WelsDecoderI16x16LumaPredH_sse2(uint8_t *pPred, const int32_t kiStride);
+; void WelsDecoderI16x16LumaPredH_sse2(uint8_t *pPred, const int32_t kiStride);
 ;*******************************************************************************
 
 %macro SSE2_PRED_H_16X16_TWO_LINE_DEC 2
@@ -363,7 +363,7 @@
     ret
 
 ;*******************************************************************************
-; void_t WelsDecoderI16x16LumaPredV_sse2(uint8_t *pPred, const int32_t kiStride);
+; void WelsDecoderI16x16LumaPredV_sse2(uint8_t *pPred, const int32_t kiStride);
 ;*******************************************************************************
 WELS_EXTERN WelsDecoderI16x16LumaPredV_sse2
 WelsDecoderI16x16LumaPredV_sse2:
@@ -406,7 +406,7 @@
     ret
 
 ;*******************************************************************************
-; void_t WelsDecoderIChromaPredPlane_sse2(uint8_t *pPred, const int32_t kiStride);
+; void WelsDecoderIChromaPredPlane_sse2(uint8_t *pPred, const int32_t kiStride);
 ;*******************************************************************************
 WELS_EXTERN WelsDecoderIChromaPredPlane_sse2
 WelsDecoderIChromaPredPlane_sse2:
@@ -515,7 +515,7 @@
 ;	7 is the start pixel of current 4x4 block
 ;	pPred[7] = ([6]+[0]*2+[1]+2)/4
 ;
-;   void_t __cdecl WelsDecoderI4x4LumaPredDDR_mmx(uint8_t *pPred, const int32_t kiStride)
+;   void __cdecl WelsDecoderI4x4LumaPredDDR_mmx(uint8_t *pPred, const int32_t kiStride)
 ;
 ;*******************************************************************************
 WelsDecoderI4x4LumaPredDDR_mmx:
@@ -571,7 +571,7 @@
 
 ALIGN 16
 ;*******************************************************************************
-;	void_t __cdecl WelsDecoderIChromaPredH_mmx(uint8_t *pPred, const int32_t kiStride)
+;	void __cdecl WelsDecoderIChromaPredH_mmx(uint8_t *pPred, const int32_t kiStride)
 ;   copy 8 pixel of 8 line from left
 ;*******************************************************************************
 %macro MMX_PRED_H_8X8_ONE_LINE 4
@@ -637,7 +637,7 @@
 
 ALIGN 16
 ;*******************************************************************************
-;	void_t __cdecl WelsDecoderIChromaPredV_mmx(uint8_t *pPred, const int32_t kiStride)
+;	void __cdecl WelsDecoderIChromaPredV_mmx(uint8_t *pPred, const int32_t kiStride)
 ;   copy 8 pixels from top 8 pixels
 ;*******************************************************************************
 WELS_EXTERN WelsDecoderIChromaPredV_mmx
@@ -697,7 +697,7 @@
 ;   j = (2 + l3 + (l2<<1) + l1)>>2
 ;   [b a f e h g j i] + [d c b a] --> mov to memory
 ;
-;   void_t WelsDecoderI4x4LumaPredHD_mmx(uint8_t *pPred, const int32_t kiStride)
+;   void WelsDecoderI4x4LumaPredHD_mmx(uint8_t *pPred, const int32_t kiStride)
 ;*******************************************************************************
 WELS_EXTERN WelsDecoderI4x4LumaPredHD_mmx
 WelsDecoderI4x4LumaPredHD_mmx:
@@ -786,7 +786,7 @@
 
 ;   [g g f e d c b a] + [g g g g] --> mov to memory
 ;
-;   void_t WelsDecoderI4x4LumaPredHU_mmx(uint8_t *pPred, const int32_t kiStride)
+;   void WelsDecoderI4x4LumaPredHU_mmx(uint8_t *pPred, const int32_t kiStride)
 ;*******************************************************************************
 WELS_EXTERN WelsDecoderI4x4LumaPredHU_mmx
 WelsDecoderI4x4LumaPredHU_mmx:
@@ -878,7 +878,7 @@
 ;   i = (2 + lt + (l0<<1) + l1)>>2
 ;   j = (2 + l0 + (l1<<1) + l2)>>2
 ;
-;   void_t WelsDecoderI4x4LumaPredVR_mmx(uint8_t *pPred, const int32_t kiStride)
+;   void WelsDecoderI4x4LumaPredVR_mmx(uint8_t *pPred, const int32_t kiStride)
 ;*******************************************************************************
 WELS_EXTERN WelsDecoderI4x4LumaPredVR_mmx
 WelsDecoderI4x4LumaPredVR_mmx:
@@ -971,7 +971,7 @@
 
 ;   [g f e d c b a] --> mov to memory
 ;
-;   void_t WelsDecoderI4x4LumaPredDDL_mmx(uint8_t *pPred, const int32_t kiStride)
+;   void WelsDecoderI4x4LumaPredDDL_mmx(uint8_t *pPred, const int32_t kiStride)
 ;*******************************************************************************
 WELS_EXTERN WelsDecoderI4x4LumaPredDDL_mmx
 WelsDecoderI4x4LumaPredDDL_mmx:
@@ -1046,7 +1046,7 @@
 
 ;   [i d c b a] + [j h g f e] --> mov to memory
 ;
-;   void_t WelsDecoderI4x4LumaPredVL_mmx(uint8_t *pPred, const int32_t kiStride)
+;   void WelsDecoderI4x4LumaPredVL_mmx(uint8_t *pPred, const int32_t kiStride)
 ;*******************************************************************************
 WELS_EXTERN WelsDecoderI4x4LumaPredVL_mmx
 WelsDecoderI4x4LumaPredVL_mmx:
@@ -1093,7 +1093,7 @@
 ALIGN 16
 ;*******************************************************************************
 ;
-;   void_t WelsDecoderIChromaPredDc_sse2(uint8_t *pPred, const int32_t kiStride)
+;   void WelsDecoderIChromaPredDc_sse2(uint8_t *pPred, const int32_t kiStride)
 ;*******************************************************************************
 WELS_EXTERN WelsDecoderIChromaPredDc_sse2
 WelsDecoderIChromaPredDc_sse2:
@@ -1198,7 +1198,7 @@
 ALIGN 16
 ;*******************************************************************************
 ;
-;   void_t WelsDecoderI16x16LumaPredDc_sse2(uint8_t *pPred, const int32_t kiStride)
+;   void WelsDecoderI16x16LumaPredDc_sse2(uint8_t *pPred, const int32_t kiStride)
 ;*******************************************************************************
 WELS_EXTERN WelsDecoderI16x16LumaPredDc_sse2
 WelsDecoderI16x16LumaPredDc_sse2:
@@ -1286,7 +1286,7 @@
 
 ALIGN 16
 ;*******************************************************************************
-;	void_t WelsDecoderI16x16LumaPredDcTop_sse2(uint8_t *pPred, const int32_t kiStride)
+;	void WelsDecoderI16x16LumaPredDcTop_sse2(uint8_t *pPred, const int32_t kiStride)
 ;*******************************************************************************
 WELS_EXTERN WelsDecoderI16x16LumaPredDcTop_sse2
 WelsDecoderI16x16LumaPredDcTop_sse2:
@@ -1366,7 +1366,7 @@
 
 ALIGN 16
 ;*******************************************************************************
-;	void_t WelsDecoderI16x16LumaPredDcNA_sse2(uint8_t *pPred, const int32_t kiStride)
+;	void WelsDecoderI16x16LumaPredDcNA_sse2(uint8_t *pPred, const int32_t kiStride)
 ;*******************************************************************************
 WELS_EXTERN WelsDecoderI16x16LumaPredDcNA_sse2
 WelsDecoderI16x16LumaPredDcNA_sse2:
@@ -1412,7 +1412,7 @@
 
 ALIGN 16
 ;*******************************************************************************
-;	void_t WelsDecoderIChromaPredDcLeft_mmx(uint8_t *pPred, const int32_t kiStride)
+;	void WelsDecoderIChromaPredDcLeft_mmx(uint8_t *pPred, const int32_t kiStride)
 ;*******************************************************************************
 WELS_EXTERN WelsDecoderIChromaPredDcLeft_mmx
 WelsDecoderIChromaPredDcLeft_mmx:
@@ -1495,7 +1495,7 @@
 
 ALIGN 16
 ;*******************************************************************************
-;	void_t WelsDecoderIChromaPredDcTop_sse2(uint8_t *pPred, const int32_t kiStride)
+;	void WelsDecoderIChromaPredDcTop_sse2(uint8_t *pPred, const int32_t kiStride)
 ;*******************************************************************************
 WELS_EXTERN WelsDecoderIChromaPredDcTop_sse2
 WelsDecoderIChromaPredDcTop_sse2:
@@ -1544,7 +1544,7 @@
 
 ALIGN 16
 ;*******************************************************************************
-;	void_t WelsDecoderIChromaPredDcNA_mmx(uint8_t *pPred, const int32_t kiStride)
+;	void WelsDecoderIChromaPredDcNA_mmx(uint8_t *pPred, const int32_t kiStride)
 ;*******************************************************************************
 WELS_EXTERN WelsDecoderIChromaPredDcNA_mmx
 WelsDecoderIChromaPredDcNA_mmx:
--- a/codec/decoder/core/inc/au_parser.h
+++ b/codec/decoder/core/inc/au_parser.h
@@ -88,12 +88,12 @@
 
 int32_t ParseNonVclNal (PWelsDecoderContext pCtx, uint8_t* pRbsp, const int32_t kiSrcLen);
 
-void_t ParseRefBasePicMarking (PBitStringAux pBs, PRefBasePicMarking pRefBasePicMarking);
+void ParseRefBasePicMarking (PBitStringAux pBs, PRefBasePicMarking pRefBasePicMarking);
 
-void_t ParsePrefixNalUnit (PWelsDecoderContext pCtx, PBitStringAux pBs);
+void ParsePrefixNalUnit (PWelsDecoderContext pCtx, PBitStringAux pBs);
 
-bool_t CheckAccessUnitBoundary (const PNalUnit kpCurNal, const PNalUnit kpLastNal, const PSps kpSps);
-bool_t CheckAccessUnitBoundaryExt (PNalUnitHeaderExt pLastNalHdrExt, PNalUnitHeaderExt pCurNalHeaderExt,
+bool CheckAccessUnitBoundary (const PNalUnit kpCurNal, const PNalUnit kpLastNal, const PSps kpSps);
+bool CheckAccessUnitBoundaryExt (PNalUnitHeaderExt pLastNalHdrExt, PNalUnitHeaderExt pCurNalHeaderExt,
                                    PSliceHeader pLastSliceHeader, PSliceHeader pCurSliceHeader);
 /*!
  *************************************************************************************
@@ -141,7 +141,7 @@
  * \note	Call it in case eNalUnitType is NAL_UNIT_SEI.
  *************************************************************************************
  */
-int32_t ParseSei (void_t* pSei, PBitStringAux pBsAux);	// reserved Sei_Msg type
+int32_t ParseSei (void* pSei, PBitStringAux pBsAux);	// reserved Sei_Msg type
 
 /*!
  *************************************************************************************
--- a/codec/decoder/core/inc/bit_stream.h
+++ b/codec/decoder/core/inc/bit_stream.h
@@ -64,7 +64,7 @@
  */
 int32_t InitBits (PBitStringAux pBitString, const uint8_t* kpBuf, const int32_t kiSize);
 
-void_t InitReadBits (PBitStringAux pBitString);
+void InitReadBits (PBitStringAux pBitString);
 
 
 
--- a/codec/decoder/core/inc/deblocking.h
+++ b/codec/decoder/core/inc/deblocking.h
@@ -54,7 +54,7 @@
  * \return	NONE
  */
 
-void_t  DeblockingInit (PDeblockingFunc pDeblockingFunc,  int32_t iCpu);
+void  DeblockingInit (PDeblockingFunc pDeblockingFunc,  int32_t iCpu);
 
 
 /*!
@@ -64,7 +64,7 @@
  *
  * \return	NONE
  */
-void_t WelsDeblockingFilterSlice (PWelsDecoderContext pCtx, PDeblockingFilterMbFunc pDeblockMb);
+void WelsDeblockingFilterSlice (PWelsDecoderContext pCtx, PDeblockingFilterMbFunc pDeblockMb);
 
 /*!
  * \brief	pixel deblocking filtering
@@ -81,10 +81,10 @@
 
 int32_t DeblockingAvailableNoInterlayer (PDqLayer pCurDqLayer, int32_t iFilterIdc);
 
-void_t DeblockingIntraMb (PDqLayer pCurDqLayer, PDeblockingFilter  pFilter, int32_t iBoundryFlag);
-void_t DeblockingInterMb (PDqLayer pCurDqLayer, PDeblockingFilter  pFilter, uint8_t nBS[2][4][4], int32_t iBoundryFlag);
+void DeblockingIntraMb (PDqLayer pCurDqLayer, PDeblockingFilter  pFilter, int32_t iBoundryFlag);
+void DeblockingInterMb (PDqLayer pCurDqLayer, PDeblockingFilter  pFilter, uint8_t nBS[2][4][4], int32_t iBoundryFlag);
 
-void_t WelsDeblockingMb (PDqLayer pCurDqLayer, PDeblockingFilter  pFilter, int32_t iBoundryFlag);
+void WelsDeblockingMb (PDqLayer pCurDqLayer, PDeblockingFilter  pFilter, int32_t iBoundryFlag);
 
 } // namespace WelsDec
 
--- a/codec/decoder/core/inc/dec_frame.h
+++ b/codec/decoder/core/inc/dec_frame.h
@@ -107,14 +107,14 @@
   PPicture				pRef;			// reference picture pointer
   PPicture				pDec;			// reconstruction picture pointer for layer
 
-  bool_t					bStoreRefBasePicFlag;				// iCurTid == 0 && iCurQid = 0 && bEncodeKeyPic = 1
-  bool_t					bTCoeffLevelPredFlag;
-  bool_t					bConstrainedIntraResamplingFlag;
+  bool					bStoreRefBasePicFlag;				// iCurTid == 0 && iCurQid = 0 && bEncodeKeyPic = 1
+  bool					bTCoeffLevelPredFlag;
+  bool					bConstrainedIntraResamplingFlag;
   uint8_t					uiRefLayerDqId;
   uint8_t					uiRefLayerChromaPhaseXPlus1Flag;
   uint8_t					uiRefLayerChromaPhaseYPlus1;
   uint8_t					uiLayerDqId;			// dq_id of current layer
-  bool_t					bUseRefBasePicFlag;	// whether reference pic or reference base pic is referred?
+  bool					bUseRefBasePicFlag;	// whether reference pic or reference base pic is referred?
 };
 
 typedef struct TagGpuAvcLayer {
--- a/codec/decoder/core/inc/dec_golomb.h
+++ b/codec/decoder/core/inc/dec_golomb.h
@@ -68,7 +68,7 @@
 static inline int32_t ShowBits (PBitStringAux pBs, int32_t iNumBits) {
 return UBITS (pBs->uiCurBits, iNumBits);
 }
-static inline void_t FlushBits (PBitStringAux pBs, int32_t iNumBits) {
+static inline void FlushBits (PBitStringAux pBs, int32_t iNumBits) {
 DUMP_BITS (pBs->uiCurBits, pBs->pCurBuf, pBs->iLeftBits, iNumBits);
 }
 static inline int32_t BsGetBits (PBitStringAux pBs, int32_t iNumBits) {
@@ -133,7 +133,7 @@
   return (g_kuiLeadingZeroTable[iValue] + 8);
 }
 
-//ASSERT(FALSE);  // should not go here
+//ASSERT(false);  // should not go here
 return -1;
 }
 
--- a/codec/decoder/core/inc/decode_mb_aux.h
+++ b/codec/decoder/core/inc/decode_mb_aux.h
@@ -38,9 +38,9 @@
 
 namespace WelsDec {
 
-void_t InitDctClipTable (void_t);
+void InitDctClipTable (void);
 
-void_t IdctResAddPred_c (uint8_t* pPred, const int32_t kiStride, int16_t* pRs);
+void IdctResAddPred_c (uint8_t* pPred, const int32_t kiStride, int16_t* pRs);
 
 #if defined(__cplusplus)
 extern "C" {
@@ -47,7 +47,7 @@
 #endif//__cplusplus
 
 #if defined(X86_ASM)
-void_t IdctResAddPred_mmx (uint8_t* pPred, const int32_t kiStride, int16_t* pRs);
+void IdctResAddPred_mmx (uint8_t* pPred, const int32_t kiStride, int16_t* pRs);
 #endif//X86_ASM
 
 #if defined(__cplusplus)
@@ -54,7 +54,7 @@
 }
 #endif//__cplusplus
 
-void_t GetI4LumaIChromaAddrTable (int32_t* pBlockOffset, const int32_t kiYStride, const int32_t kiUVStride);
+void GetI4LumaIChromaAddrTable (int32_t* pBlockOffset, const int32_t kiYStride, const int32_t kiUVStride);
 
 } // namespace WelsDec
 
--- a/codec/decoder/core/inc/decode_slice.h
+++ b/codec/decoder/core/inc/decode_slice.h
@@ -37,7 +37,7 @@
 
 namespace WelsDec {
 
-void_t WelsBlockInit (int16_t* pBlock, int32_t iWidth, int32_t iHeight, int32_t iStride, uint8_t uiVal);
+void WelsBlockInit (int16_t* pBlock, int32_t iWidth, int32_t iHeight, int32_t iStride, uint8_t uiVal);
 
 int32_t WelsActualDecodeMbCavlcISlice (PWelsDecoderContext pCtx);
 int32_t WelsDecodeMbCavlcISlice (PWelsDecoderContext pCtx, PNalUnit pNalCur);
@@ -48,21 +48,21 @@
 
 int32_t WelsTargetSliceConstruction (PWelsDecoderContext pCtx); //construction based on slice
 
-int32_t WelsDecodeSlice (PWelsDecoderContext pCtx, bool_t bFirstSliceInLayer, PNalUnit pNalCur);
+int32_t WelsDecodeSlice (PWelsDecoderContext pCtx, bool bFirstSliceInLayer, PNalUnit pNalCur);
 
 
 int32_t WelsTargetMbConstruction (PWelsDecoderContext pCtx);
 
-int32_t WelsMbIntraPredictionConstruction (PWelsDecoderContext pCtx, PDqLayer pCurLayer, bool_t bOutput);
+int32_t WelsMbIntraPredictionConstruction (PWelsDecoderContext pCtx, PDqLayer pCurLayer, bool bOutput);
 int32_t WelsMbInterSampleConstruction (PWelsDecoderContext pCtx, PDqLayer pCurLayer,
                                        uint8_t* pDstY, uint8_t* pDstU, uint8_t* pDstV, int32_t iStrideL, int32_t iStrideC);
 int32_t WelsMbInterConstruction (PWelsDecoderContext pCtx, PDqLayer pCurLayer);
-void_t WelsLumaDcDequantIdct (int16_t* pBlock, int32_t iQp);
+void WelsLumaDcDequantIdct (int16_t* pBlock, int32_t iQp);
 int32_t WelsMbInterPrediction (PWelsDecoderContext pCtx, PDqLayer pCurLayer);
-void_t WelsMbCopy (uint8_t* pDst, int32_t iStrideDst, uint8_t* pSrc, int32_t iStrideSrc,
+void WelsMbCopy (uint8_t* pDst, int32_t iStrideDst, uint8_t* pSrc, int32_t iStrideSrc,
                    int32_t iHeight, int32_t iWidth);
 
-void_t WelsChromaDcIdct (int16_t* pBlock);
+void WelsChromaDcIdct (int16_t* pBlock);
 
 #ifdef __cplusplus
 extern "C" {
@@ -69,8 +69,8 @@
 #endif//__cplusplus
 
 #ifdef  X86_ASM
-void_t WelsResBlockZero16x16_sse2 (int16_t* pBlock, int32_t iStride);
-void_t WelsResBlockZero8x8_sse2 (int16_t* pBlock, int32_t iStride);
+void WelsResBlockZero16x16_sse2 (int16_t* pBlock, int32_t iStride);
+void WelsResBlockZero8x8_sse2 (int16_t* pBlock, int32_t iStride);
 #endif
 
 #ifdef __cplusplus
@@ -77,11 +77,11 @@
 }
 #endif//__cplusplus
 
-void_t WelsBlockZero16x16_c (int16_t* pBlock, int32_t iStride);
-void_t WelsBlockZero8x8_c (int16_t* pBlock, int32_t iStride);
-void_t SetNonZeroCount_c (int16_t* pBlock, int8_t* pNonZeroCount);
+void WelsBlockZero16x16_c (int16_t* pBlock, int32_t iStride);
+void WelsBlockZero8x8_c (int16_t* pBlock, int32_t iStride);
+void SetNonZeroCount_c (int16_t* pBlock, int8_t* pNonZeroCount);
 
-void_t WelsBlockFuncInit (SBlockFunc* pFunc,  int32_t iCpu);
+void WelsBlockFuncInit (SBlockFunc* pFunc,  int32_t iCpu);
 
 } // namespace WelsDec
 
--- a/codec/decoder/core/inc/decoder.h
+++ b/codec/decoder/core/inc/decoder.h
@@ -52,7 +52,7 @@
 /*!
  * \brief	configure decoder parameters
  */
-int32_t DecoderConfigParam (PWelsDecoderContext pCtx, const void_t* kpParam);
+int32_t DecoderConfigParam (PWelsDecoderContext pCtx, const void* kpParam);
 
 /*!
  *************************************************************************************
@@ -68,7 +68,7 @@
  * \note	N/A
  *************************************************************************************
  */
-int32_t WelsInitDecoder (PWelsDecoderContext pCtx,  void_t* pTraceHandle, PWelsLogCallbackFunc pLog);
+int32_t WelsInitDecoder (PWelsDecoderContext pCtx,  void* pTraceHandle, PWelsLogCallbackFunc pLog);
 
 /*!
  *************************************************************************************
@@ -81,7 +81,7 @@
  * \note	N/A
  *************************************************************************************
  */
-void_t WelsEndDecoder (PWelsDecoderContext pCtx);
+void WelsEndDecoder (PWelsDecoderContext pCtx);
 
 /*!
  *************************************************************************************
@@ -112,7 +112,7 @@
 /*
  *	free memory blocks in avc
  */
-void_t WelsFreeMem (PWelsDecoderContext pCtx);
+void WelsFreeMem (PWelsDecoderContext pCtx);
 
 /*
  * set colorspace format in decoder
@@ -130,11 +130,11 @@
  */
 int32_t SyncPictureResolutionExt (PWelsDecoderContext pCtx, const int32_t kiMbWidth, const int32_t kiMbHeight);
 
-void_t AssignFuncPointerForRec (PWelsDecoderContext pCtx);
+void AssignFuncPointerForRec (PWelsDecoderContext pCtx);
 
-void_t ResetParameterSetsState (PWelsDecoderContext pCtx);
+void ResetParameterSetsState (PWelsDecoderContext pCtx);
 
-void_t GetVclNalTemporalId (PWelsDecoderContext pCtx); //get the info that whether or not have VCL NAL in current AU,
+void GetVclNalTemporalId (PWelsDecoderContext pCtx); //get the info that whether or not have VCL NAL in current AU,
 //and if YES, get the temporal ID
 
 #ifdef __cplusplus
--- a/codec/decoder/core/inc/decoder_context.h
+++ b/codec/decoder/core/inc/decoder_context.h
@@ -79,9 +79,9 @@
 //typedef int32_t (*rec_mb) (Mb *cur_mb, PWelsDecoderContext pCtx);
 
 /*typedef for get intra predictor func pointer*/
-typedef void_t (*PGetIntraPredFunc) (uint8_t* pPred, const int32_t kiLumaStride);
-typedef void_t (*PIdctResAddPredFunc) (uint8_t* pPred, const int32_t kiStride, int16_t* pRs);
-typedef void_t (*PExpandPictureFunc) (uint8_t* pDst, const int32_t kiStride, const int32_t kiPicWidth,
+typedef void (*PGetIntraPredFunc) (uint8_t* pPred, const int32_t kiLumaStride);
+typedef void (*PIdctResAddPredFunc) (uint8_t* pPred, const int32_t kiStride, int16_t* pRs);
+typedef void (*PExpandPictureFunc) (uint8_t* pDst, const int32_t kiStride, const int32_t kiPicWidth,
                                       const int32_t kiPicHeight);
 
 /**/
@@ -95,7 +95,7 @@
   int32_t				iMaxLongTermFrameIdx;
 } SRefPic, *PRefPic;
 
-typedef void_t (*PWelsMcFunc) (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+typedef void (*PWelsMcFunc) (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                int16_t iMvX, int16_t iMvY, int32_t iWidth, int32_t iHeight);
 typedef struct TagMcFunc {
   PWelsMcFunc pMcLumaFunc;
@@ -116,13 +116,13 @@
   struct TagDeblockingFunc*  pLoopf;
 } SDeblockingFilter, *PDeblockingFilter;
 
-typedef void_t (*PDeblockingFilterMbFunc) (PDqLayer pCurDqLayer, PDeblockingFilter  filter, int32_t boundry_flag);
-typedef void_t (*PLumaDeblockingLT4Func) (uint8_t* iSampleY, int32_t iStride, int32_t iAlpha, int32_t iBeta,
+typedef void (*PDeblockingFilterMbFunc) (PDqLayer pCurDqLayer, PDeblockingFilter  filter, int32_t boundry_flag);
+typedef void (*PLumaDeblockingLT4Func) (uint8_t* iSampleY, int32_t iStride, int32_t iAlpha, int32_t iBeta,
     int8_t* iTc);
-typedef void_t (*PLumaDeblockingEQ4Func) (uint8_t* iSampleY, int32_t iStride, int32_t iAlpha, int32_t iBeta);
-typedef void_t (*PChromaDeblockingLT4Func) (uint8_t* iSampleCb, uint8_t* iSampleCr, int32_t iStride, int32_t iAlpha,
+typedef void (*PLumaDeblockingEQ4Func) (uint8_t* iSampleY, int32_t iStride, int32_t iAlpha, int32_t iBeta);
+typedef void (*PChromaDeblockingLT4Func) (uint8_t* iSampleCb, uint8_t* iSampleCr, int32_t iStride, int32_t iAlpha,
     int32_t iBeta, int8_t* iTc);
-typedef void_t (*PChromaDeblockingEQ4Func) (uint8_t* iSampleCb, uint8_t* iSampleCr, int32_t iStride, int32_t iAlpha,
+typedef void (*PChromaDeblockingEQ4Func) (uint8_t* iSampleCb, uint8_t* iSampleCr, int32_t iStride, int32_t iAlpha,
     int32_t iBeta);
 
 typedef struct TagDeblockingFunc {
@@ -137,11 +137,11 @@
   PChromaDeblockingEQ4Func  pfChromaDeblockinEQ4Hor;
 } SDeblockingFunc, *PDeblockingFunc;
 
-typedef void_t (*PWelsBlockAddStrideFunc) (uint8_t* pDest, uint8_t* pPred, int16_t* pRes, int32_t iPredStride,
+typedef void (*PWelsBlockAddStrideFunc) (uint8_t* pDest, uint8_t* pPred, int16_t* pRes, int32_t iPredStride,
     int32_t iResStride);
-typedef void_t (*PWelsBlockZeroFunc) (int16_t* pBlock, int32_t iStride);
-typedef void_t (*PWelsNonZeroCountFunc) (int16_t* pBlock, int8_t* pNonZeroCount);
-typedef void_t (*PWelsSimpleIdct4x4AddFunc) (int16_t* pDest, int16_t* pSrc, int32_t iStride);
+typedef void (*PWelsBlockZeroFunc) (int16_t* pBlock, int32_t iStride);
+typedef void (*PWelsNonZeroCountFunc) (int16_t* pBlock, int8_t* pNonZeroCount);
+typedef void (*PWelsSimpleIdct4x4AddFunc) (int16_t* pDest, int16_t* pSrc, int32_t iStride);
 
 typedef  struct  TagBlockFunc {
   PWelsBlockZeroFunc			pWelsBlockZero16x16Func;
@@ -149,7 +149,7 @@
   PWelsNonZeroCountFunc		pWelsSetNonZeroCountFunc;
 } SBlockFunc;
 
-typedef void_t (*PWelsFillNeighborMbInfoIntra4x4Func) (PNeighAvail pNeighAvail, uint8_t* pNonZeroCount,
+typedef void (*PWelsFillNeighborMbInfoIntra4x4Func) (PNeighAvail pNeighAvail, uint8_t* pNonZeroCount,
     int8_t* pIntraPredMode, PDqLayer pCurLayer);
 typedef int32_t (*PWelsParseIntra4x4ModeFunc) (PNeighAvail pNeighAvail, int8_t* pIntraPredMode, PBitStringAux pBs,
     PDqLayer pCurDqLayer);
@@ -166,7 +166,7 @@
 
 typedef struct TagWelsDecoderContext {
   // Input
-  void_t*				pArgDec;			// structured arguments for decoder, reserved here for extension in the future
+  void*				pArgDec;			// structured arguments for decoder, reserved here for extension in the future
 
   SDataBuffer       	sRawData;
 
@@ -180,8 +180,8 @@
 
   int32_t				iOutputColorFormat;		// color space format to be outputed
   VIDEO_BITSTREAM_TYPE eVideoType; //indicate the type of video to decide whether or not to do qp_delta error detection.
-  bool_t				bErrorResilienceFlag;		// error resilience flag
-  bool_t				bHaveGotMemory;	// global memory for decoder context related ever requested?
+  bool				bErrorResilienceFlag;		// error resilience flag
+  bool				bHaveGotMemory;	// global memory for decoder context related ever requested?
 
   int32_t				iImgWidthInPixel;	// width of image in pixel reconstruction picture to be output
   int32_t				iImgHeightInPixel;// height of image in pixel reconstruction picture to be output
@@ -191,7 +191,7 @@
   ESliceType			eSliceType;			// Slice type
   int32_t				iFrameNum;
   int32_t				iPrevFrameNum;		// frame number of previous frame well decoded for non-truncated mode yet
-  bool_t              bLastHasMmco5;      //
+  bool              bLastHasMmco5;      //
   int32_t				iErrorCode;			// error code return while decoding in case packets lost
   SFmo				sFmoList[MAX_PPS_COUNT];	// list for FMO storage
   PFmo				pFmo;				// current fmo context after parsed slice_header
@@ -270,25 +270,25 @@
   int32_t             iPicHeightReq;		// picture height have requested the memory
 
   uint8_t				uiTargetDqId;		// maximal DQ ID in current access unit, meaning target layer ID
-  bool_t				bAvcBasedFlag;		// For decoding bitstream:
-  bool_t				bEndOfStreamFlag;	// Flag on end of stream requested by external application layer
-  bool_t				bInitialDqLayersMem;	// dq layers related memory is available?
+  bool				bAvcBasedFlag;		// For decoding bitstream:
+  bool				bEndOfStreamFlag;	// Flag on end of stream requested by external application layer
+  bool				bInitialDqLayersMem;	// dq layers related memory is available?
 
-  bool_t              bOnlyOneLayerInCurAuFlag; //only one layer in current AU: 1
+  bool              bOnlyOneLayerInCurAuFlag; //only one layer in current AU: 1
 
   // for EC parameter sets
-  bool_t				bSpsExistAheadFlag;	// whether does SPS NAL exist ahead of sequence?
-  bool_t				bSubspsExistAheadFlag;// whether does Subset SPS NAL exist ahead of sequence?
-  bool_t				bPpsExistAheadFlag;	// whether does PPS NAL exist ahead of sequence?
+  bool				bSpsExistAheadFlag;	// whether does SPS NAL exist ahead of sequence?
+  bool				bSubspsExistAheadFlag;// whether does Subset SPS NAL exist ahead of sequence?
+  bool				bPpsExistAheadFlag;	// whether does PPS NAL exist ahead of sequence?
 
-  bool_t				bSpsAvailFlags[MAX_SPS_COUNT];
-  bool_t				bSubspsAvailFlags[MAX_SPS_COUNT];
-  bool_t				bPpsAvailFlags[MAX_PPS_COUNT];
-  bool_t				bReferenceLostAtT0Flag;
+  bool				bSpsAvailFlags[MAX_SPS_COUNT];
+  bool				bSubspsAvailFlags[MAX_SPS_COUNT];
+  bool				bPpsAvailFlags[MAX_PPS_COUNT];
+  bool				bReferenceLostAtT0Flag;
 #ifdef LONG_TERM_REF
-  bool_t				bParamSetsLostFlag;	//sps or pps do not exist or not correct
+  bool				bParamSetsLostFlag;	//sps or pps do not exist or not correct
 
-  bool_t
+  bool
   bCurAuContainLtrMarkSeFlag; //current AU has the LTR marking syntax element, mark the previous frame or self
   int32_t             iFrameNumOfAuMarkedLtr; //if bCurAuContainLtrMarkSeFlag==true, SHOULD set this variable
 
@@ -319,10 +319,10 @@
   int32_t iFeedbackVclNalInAu;
   int32_t iFeedbackTidInAu;
 
-  bool_t bAuReadyFlag;   // TRUE: one au is ready for decoding; FALSE: default value
+  bool bAuReadyFlag;   // true: one au is ready for decoding; false: default value
 
   //trace handle
-  void_t*      pTraceHandle;
+  void*      pTraceHandle;
 
 #ifdef NO_WAITING_AU
   //Save the last nal header info
--- a/codec/decoder/core/inc/decoder_core.h
+++ b/codec/decoder/core/inc/decoder_core.h
@@ -64,7 +64,7 @@
  * Free memory introduced in WelsInitMemory at destruction of decoder.
  *
  */
-void_t WelsFreeMemory (PWelsDecoderContext pCtx);
+void WelsFreeMemory (PWelsDecoderContext pCtx);
 
 /*!
  * \brief	request memory when maximal picture width and height are available
@@ -74,7 +74,7 @@
 /*!
  * \brief	free dq layer context memory related
  */
-void_t UninitialDqLayersContext (PWelsDecoderContext pCtx);
+void UninitialDqLayersContext (PWelsDecoderContext pCtx);
 
 /*
  *	DecodeNalHeaderExt
@@ -83,19 +83,19 @@
  *	pNal:	target NALUnit ptr
  *	pSrc:	NAL Unit bitstream
  */
-void_t DecodeNalHeaderExt (PNalUnit pNal, uint8_t* pSrc);
+void DecodeNalHeaderExt (PNalUnit pNal, uint8_t* pSrc);
 
 /*
  *	ParseSliceHeaderSyntaxs
  *	Parse slice header of bitstream
  */
-int32_t ParseSliceHeaderSyntaxs (PWelsDecoderContext pCtx, PBitStringAux pBs, const bool_t kbExtensionFlag);
+int32_t ParseSliceHeaderSyntaxs (PWelsDecoderContext pCtx, PBitStringAux pBs, const bool kbExtensionFlag);
 /*
  *	Copy relative syntax elements of NALUnitHeaderExt, sRefPicBaseMarking and bStoreRefBasePicFlag in prefix nal unit.
  *	pSrc:	mark as decoded prefix NAL
  *	pDst:	succeeded VCL NAL based AVC (I/P Slice)
  */
-bool_t PrefetchNalHeaderExtSyntax (PWelsDecoderContext pCtx, PNalUnit const kpDst, PNalUnit const kpSrc);
+bool PrefetchNalHeaderExtSyntax (PWelsDecoderContext pCtx, PNalUnit const kpDst, PNalUnit const kpSrc);
 
 
 /*
@@ -123,14 +123,14 @@
 /*
  *	Prepare current dq layer context initialization.
  */
-void_t WelsDqLayerDecodeStart (PWelsDecoderContext pCtx, PNalUnit pCurNal, PSps pSps, PPps pPps);
+void WelsDqLayerDecodeStart (PWelsDecoderContext pCtx, PNalUnit pCurNal, PSps pSps, PPps pPps);
 
 
 int32_t WelsDecodeAccessUnitStart (PWelsDecoderContext pCtx);
-void_t WelsDecodeAccessUnitEnd (PWelsDecoderContext pCtx);
+void WelsDecodeAccessUnitEnd (PWelsDecoderContext pCtx);
 
-void_t ForceResetCurrentAccessUnit (PAccessUnit pAu);
-void_t ForceClearCurrentNal (PAccessUnit pAu);
+void ForceResetCurrentAccessUnit (PAccessUnit pAu);
+void ForceClearCurrentNal (PAccessUnit pAu);
 
 } // namespace WelsDec
 
--- a/codec/decoder/core/inc/expand_pic.h
+++ b/codec/decoder/core/inc/expand_pic.h
@@ -47,10 +47,10 @@
 
 namespace WelsDec {
 
-void_t ExpandReferencingPicture (PPicture pPic, PExpandPictureFunc pExpandPictureLuma,
+void ExpandReferencingPicture (PPicture pPic, PExpandPictureFunc pExpandPictureLuma,
                                  PExpandPictureFunc pExpandPictureChroma[2]);
 
-void_t InitExpandPictureFunc (SExpandPicFunc* pExpandPicFunc, const uint32_t kuiCpuFlags);
+void InitExpandPictureFunc (SExpandPicFunc* pExpandPicFunc, const uint32_t kuiCpuFlags);
 
 } // namespace WelsDec
 
--- a/codec/decoder/core/inc/fmo.h
+++ b/codec/decoder/core/inc/fmo.h
@@ -58,7 +58,7 @@
 int32_t		iCountMbNum;
 int32_t		iSliceGroupCount;
 int32_t		iSliceGroupType;
-bool_t		bActiveFlag;
+bool		bActiveFlag;
 uint8_t		uiReserved[3];		// reserved padding bytes
 } SFmo, *PFmo;
 
@@ -84,7 +84,7 @@
  *
  * \return	NONE
  */
-void_t UninitFmoList (PFmo pFmo, const int32_t kiCnt, const int32_t kiAvail);
+void UninitFmoList (PFmo pFmo, const int32_t kiCnt, const int32_t kiAvail);
 
 /*!
  * \brief	update/insert FMO parameter unit
@@ -96,7 +96,7 @@
  *
  * \return	true - update/insert successfully; false - failed;
  */
-bool_t FmoParamUpdate (PFmo pFmo, PSps pSps, PPps pPps, int32_t* pActiveFmoNum);
+bool FmoParamUpdate (PFmo pFmo, PSps pSps, PPps pPps, int32_t* pActiveFmoNum);
 
 /*!
  * \brief	Get successive mb to be processed with given current mb_xy
--- a/codec/decoder/core/inc/get_intra_predictor.h
+++ b/codec/decoder/core/inc/get_intra_predictor.h
@@ -45,36 +45,36 @@
 
 namespace WelsDec {
 
-void_t WelsI4x4LumaPredV_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsI4x4LumaPredH_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsI4x4LumaPredDc_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsI4x4LumaPredDcLeft_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsI4x4LumaPredDcTop_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsI4x4LumaPredDcNA_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsI4x4LumaPredDDL_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsI4x4LumaPredDDLTop_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsI4x4LumaPredDDR_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsI4x4LumaPredVL_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsI4x4LumaPredVLTop_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsI4x4LumaPredVR_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsI4x4LumaPredHU_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsI4x4LumaPredHD_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI4x4LumaPredV_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI4x4LumaPredH_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI4x4LumaPredDc_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI4x4LumaPredDcLeft_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI4x4LumaPredDcTop_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI4x4LumaPredDcNA_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI4x4LumaPredDDL_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI4x4LumaPredDDLTop_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI4x4LumaPredDDR_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI4x4LumaPredVL_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI4x4LumaPredVLTop_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI4x4LumaPredVR_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI4x4LumaPredHU_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI4x4LumaPredHD_c (uint8_t* pPred, const int32_t kiStride);
 
-void_t WelsIChromaPredV_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsIChromaPredH_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsIChromaPredPlane_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsIChromaPredDc_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsIChromaPredDcLeft_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsIChromaPredDcTop_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsIChromaPredDcNA_c (uint8_t* pPred, const int32_t kiStride);
+void WelsIChromaPredV_c (uint8_t* pPred, const int32_t kiStride);
+void WelsIChromaPredH_c (uint8_t* pPred, const int32_t kiStride);
+void WelsIChromaPredPlane_c (uint8_t* pPred, const int32_t kiStride);
+void WelsIChromaPredDc_c (uint8_t* pPred, const int32_t kiStride);
+void WelsIChromaPredDcLeft_c (uint8_t* pPred, const int32_t kiStride);
+void WelsIChromaPredDcTop_c (uint8_t* pPred, const int32_t kiStride);
+void WelsIChromaPredDcNA_c (uint8_t* pPred, const int32_t kiStride);
 
-void_t WelsI16x16LumaPredV_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsI16x16LumaPredH_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsI16x16LumaPredPlane_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsI16x16LumaPredDc_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsI16x16LumaPredDcTop_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsI16x16LumaPredDcLeft_c (uint8_t* pPred, const int32_t kiStride);
-void_t WelsI16x16LumaPredDcNA_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI16x16LumaPredV_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI16x16LumaPredH_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI16x16LumaPredPlane_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI16x16LumaPredDc_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI16x16LumaPredDcTop_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI16x16LumaPredDcLeft_c (uint8_t* pPred, const int32_t kiStride);
+void WelsI16x16LumaPredDcNA_c (uint8_t* pPred, const int32_t kiStride);
 
 #if defined(__cplusplus)
 extern "C" {
@@ -81,30 +81,30 @@
 #endif//__cplusplus
 
 #if defined(X86_ASM)
-void_t WelsDecoderI16x16LumaPredPlane_sse2 (uint8_t* pPred, const int32_t kiStride);
-void_t WelsDecoderI16x16LumaPredH_sse2 (uint8_t* pPred, const int32_t kiStride);
-void_t WelsDecoderI16x16LumaPredV_sse2 (uint8_t* pPred, const int32_t kiStride);
-void_t WelsDecoderI16x16LumaPredDc_sse2 (uint8_t* pPred, const int32_t kiStride);
-void_t WelsDecoderI16x16LumaPredDcTop_sse2 (uint8_t* pPred, const int32_t kiStride);
-void_t WelsDecoderI16x16LumaPredDcNA_sse2 (uint8_t* pPred, const int32_t kiStride);
+void WelsDecoderI16x16LumaPredPlane_sse2 (uint8_t* pPred, const int32_t kiStride);
+void WelsDecoderI16x16LumaPredH_sse2 (uint8_t* pPred, const int32_t kiStride);
+void WelsDecoderI16x16LumaPredV_sse2 (uint8_t* pPred, const int32_t kiStride);
+void WelsDecoderI16x16LumaPredDc_sse2 (uint8_t* pPred, const int32_t kiStride);
+void WelsDecoderI16x16LumaPredDcTop_sse2 (uint8_t* pPred, const int32_t kiStride);
+void WelsDecoderI16x16LumaPredDcNA_sse2 (uint8_t* pPred, const int32_t kiStride);
 
-void_t WelsDecoderIChromaPredDcTop_sse2 (uint8_t* pPred, const int32_t kiStride);
-void_t WelsDecoderIChromaPredPlane_sse2 (uint8_t* pPred, const int32_t kiStride);
-void_t WelsDecoderIChromaPredDc_sse2 (uint8_t* pPred, const int32_t kiStride);
-void_t WelsDecoderIChromaPredH_mmx (uint8_t* pPred, const int32_t kiStride);
-void_t WelsDecoderIChromaPredV_mmx (uint8_t* pPred, const int32_t kiStride);
-void_t WelsDecoderIChromaPredDcLeft_mmx (uint8_t* pPred, const int32_t kiStride);
-void_t WelsDecoderIChromaPredDcNA_mmx (uint8_t* pPred, const int32_t kiStride);
+void WelsDecoderIChromaPredDcTop_sse2 (uint8_t* pPred, const int32_t kiStride);
+void WelsDecoderIChromaPredPlane_sse2 (uint8_t* pPred, const int32_t kiStride);
+void WelsDecoderIChromaPredDc_sse2 (uint8_t* pPred, const int32_t kiStride);
+void WelsDecoderIChromaPredH_mmx (uint8_t* pPred, const int32_t kiStride);
+void WelsDecoderIChromaPredV_mmx (uint8_t* pPred, const int32_t kiStride);
+void WelsDecoderIChromaPredDcLeft_mmx (uint8_t* pPred, const int32_t kiStride);
+void WelsDecoderIChromaPredDcNA_mmx (uint8_t* pPred, const int32_t kiStride);
 
 
 
-void_t WelsDecoderI4x4LumaPredH_sse2(uint8_t *pPred, const int32_t kiStride);
-void_t WelsDecoderI4x4LumaPredDDR_mmx (uint8_t* pPred, const int32_t kiStride);
-void_t WelsDecoderI4x4LumaPredHD_mmx (uint8_t* pPred, const int32_t kiStride);
-void_t WelsDecoderI4x4LumaPredHU_mmx (uint8_t* pPred, const int32_t kiStride);
-void_t WelsDecoderI4x4LumaPredVR_mmx (uint8_t* pPred, const int32_t kiStride);
-void_t WelsDecoderI4x4LumaPredDDL_mmx (uint8_t* pPred, const int32_t kiStride);
-void_t WelsDecoderI4x4LumaPredVL_mmx (uint8_t* pPred, const int32_t kiStride);
+void WelsDecoderI4x4LumaPredH_sse2(uint8_t *pPred, const int32_t kiStride);
+void WelsDecoderI4x4LumaPredDDR_mmx (uint8_t* pPred, const int32_t kiStride);
+void WelsDecoderI4x4LumaPredHD_mmx (uint8_t* pPred, const int32_t kiStride);
+void WelsDecoderI4x4LumaPredHU_mmx (uint8_t* pPred, const int32_t kiStride);
+void WelsDecoderI4x4LumaPredVR_mmx (uint8_t* pPred, const int32_t kiStride);
+void WelsDecoderI4x4LumaPredDDL_mmx (uint8_t* pPred, const int32_t kiStride);
+void WelsDecoderI4x4LumaPredVL_mmx (uint8_t* pPred, const int32_t kiStride);
 #endif//X86_ASM
 
 #if defined(__cplusplus)
--- a/codec/decoder/core/inc/manage_dec_ref.h
+++ b/codec/decoder/core/inc/manage_dec_ref.h
@@ -53,10 +53,10 @@
 REMOVE_BASE_FIRST = 2
 } ERemoveFlag;
 
-void_t  WelsResetRefPic (PWelsDecoderContext pCtx);
+void  WelsResetRefPic (PWelsDecoderContext pCtx);
 int32_t WelsInitRefList (PWelsDecoderContext pCtx, int32_t iPoc);
 int32_t WelsReorderRefList (PWelsDecoderContext pCtx);
-int32_t WelsMarkAsRef (PWelsDecoderContext pCtx, const bool_t kbRefBaseMarkingFlag);
+int32_t WelsMarkAsRef (PWelsDecoderContext pCtx, const bool kbRefBaseMarkingFlag);
 
 static PPicture WelsDelShortFromList (PRefPic pRefPic, int32_t iFrameNum,           ERemoveFlag eRemoveFlag);
 static PPicture WelsDelLongFromList (PRefPic pRefPic, uint32_t uiLongTermFrameIdx, ERemoveFlag eRemoveFlag);
@@ -65,7 +65,7 @@
 
 static int32_t MMCOBase (PWelsDecoderContext pCtx, PRefBasePicMarking pRefPicBaseMarking);
 static int32_t MMCO (PWelsDecoderContext pCtx, PRefPicMarking pRefPicMarking);
-static int32_t MMCOProcess (PWelsDecoderContext pCtx, uint32_t uiMmcoType, bool_t bRefBasePic,
+static int32_t MMCOProcess (PWelsDecoderContext pCtx, uint32_t uiMmcoType, bool bRefBasePic,
                             int32_t iShortFrameNum, uint32_t uiLongTermPicNum, int32_t iLongTermFrameIdx, int32_t iMaxLongTermFrameIdx);
 static int32_t SlidingWindow (PWelsDecoderContext pCtx);
 
--- a/codec/decoder/core/inc/mc.h
+++ b/codec/decoder/core/inc/mc.h
@@ -40,10 +40,10 @@
 
 namespace WelsDec {
 
-typedef void_t (*PMcChromaWidthExtFunc) (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+typedef void (*PMcChromaWidthExtFunc) (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
     const uint8_t* kpABCD, int32_t iHeight);
 
-void_t InitMcFunc (SMcFunc* pMcFunc, int32_t iCpu);
+void InitMcFunc (SMcFunc* pMcFunc, int32_t iCpu);
 
 } // namespace WelsDec
 
--- a/codec/decoder/core/inc/mem_align.h
+++ b/codec/decoder/core/inc/mem_align.h
@@ -59,7 +59,7 @@
 * \note	N/A
 *************************************************************************************
 */
-void_t* WelsMalloc (const uint32_t kuiSize, const str_t* kpTag);
+void* WelsMalloc (const uint32_t kuiSize, const char* kpTag);
 
 /*!
 *************************************************************************************
@@ -73,7 +73,7 @@
 * \note	N/A
 *************************************************************************************
 */
-void_t WelsFree (void_t* pPtr, const str_t* kpTag);
+void WelsFree (void* pPtr, const char* kpTag);
 
 #define WELS_SAFE_FREE(pPtr, pTag)		if (pPtr) { WelsFree(pPtr, pTag); pPtr = NULL; }
 
--- a/codec/decoder/core/inc/mv_pred.h
+++ b/codec/decoder/core/inc/mv_pred.h
@@ -50,7 +50,7 @@
 * \param
 * \param
 */
-void_t UpdateP16x16MotionInfo (PDqLayer pCurDqLayer, int8_t iRef, int16_t iMVs[2]);
+void UpdateP16x16MotionInfo (PDqLayer pCurDqLayer, int8_t iRef, int16_t iMVs[2]);
 
 /*!
 * \brief   update mv and ref_index cache for current MB, only for P_16x8
@@ -57,7 +57,7 @@
 * \param
 * \param
 */
-void_t UpdateP16x8MotionInfo (PDqLayer pCurDqLayer, int16_t iMotionVector[LIST_A][30][MV_A],
+void UpdateP16x8MotionInfo (PDqLayer pCurDqLayer, int16_t iMotionVector[LIST_A][30][MV_A],
                               int8_t iRefIndex[LIST_A][30],
                               int32_t iPartIdx, int8_t iRef, int16_t iMVs[2]);
 
@@ -67,7 +67,7 @@
  * \param
  * \param
  */
-void_t UpdateP8x16MotionInfo (PDqLayer pCurDqLayer, int16_t iMotionVector[LIST_A][30][MV_A],
+void UpdateP8x16MotionInfo (PDqLayer pCurDqLayer, int16_t iMotionVector[LIST_A][30][MV_A],
                               int8_t iRefIndex[LIST_A][30],
                               int32_t iPartIdx, int8_t iRef, int16_t iMVs[2]);
 
@@ -76,7 +76,7 @@
  * \param
  * \param 	output iMvp[]
  */
-void_t PredPSkipMvFromNeighbor (PDqLayer pCurLayer, int16_t iMvp[2]);
+void PredPSkipMvFromNeighbor (PDqLayer pCurLayer, int16_t iMvp[2]);
 
 /*!
  * \brief   get the motion predictor for 4*4 or 8*8 or 16*16 block
@@ -83,7 +83,7 @@
  * \param
  * \param 	output iMvp[]
  */
-void_t PredMv (int16_t iMotionVector[LIST_A][30][MV_A], int8_t iRefIndex[LIST_A][30],
+void PredMv (int16_t iMotionVector[LIST_A][30][MV_A], int8_t iRefIndex[LIST_A][30],
                int32_t iPartIdx, int32_t iPartWidth, int8_t iRef, int16_t iMVP[2]);
 
 /*!
@@ -91,7 +91,7 @@
  * \param
  * \param 	output mvp_x and mvp_y
  */
-void_t PredInter16x8Mv (int16_t iMotionVector[LIST_A][30][MV_A], int8_t iRefIndex[LIST_A][30],
+void PredInter16x8Mv (int16_t iMotionVector[LIST_A][30][MV_A], int8_t iRefIndex[LIST_A][30],
                         int32_t iPartIdx, int8_t iRef, int16_t iMVP[2]);
 
 /*!
@@ -99,7 +99,7 @@
  * \param
  * \param 	output mvp_x and mvp_y
  */
-void_t PredInter8x16Mv (int16_t iMotionVector[LIST_A][30][MV_A], int8_t iRefIndex[LIST_A][30],
+void PredInter8x16Mv (int16_t iMotionVector[LIST_A][30][MV_A], int8_t iRefIndex[LIST_A][30],
                         int32_t iPartIdx, int8_t iRef, int16_t iMVP[2]);
 
 } // namespace WelsDec
--- a/codec/decoder/core/inc/nal_prefix.h
+++ b/codec/decoder/core/inc/nal_prefix.h
@@ -55,7 +55,7 @@
   SNalUnitHeader	sNalUnitHeader;
 
 //	uint8_t		reserved_one_bit;
-  bool_t		bIdrFlag;
+  bool		bIdrFlag;
   uint8_t		uiPriorityId;
   int8_t		iNoInterLayerPredFlag;	// change as int8_t to support 3 values probably in encoder
   uint8_t		uiDependencyId;
@@ -62,22 +62,22 @@
 
   uint8_t		uiQualityId;
   uint8_t		uiTemporalId;
-  bool_t		bUseRefBasePicFlag;
-  bool_t		bDiscardableFlag;
+  bool		bUseRefBasePicFlag;
+  bool		bDiscardableFlag;
 
-  bool_t		bOutputFlag;
+  bool		bOutputFlag;
   uint8_t		uiReservedThree2Bits;
   // Derived variable(s)
   uint8_t		uiLayerDqId;
-  bool_t		bNalExtFlag;
+  bool		bNalExtFlag;
 } SNalUnitHeaderExt, *PNalUnitHeaderExt;
 
 /* Prefix NAL Unix syntax, refer to Page 392 in JVT X201wcm */
 typedef struct TagPrefixNalUnit {
   SRefBasePicMarking	sRefPicBaseMarking;
-  bool_t		bStoreRefBasePicFlag;
-  bool_t		bPrefixNalUnitAdditionalExtFlag;
-  bool_t		bPrefixNalUnitExtFlag;
+  bool		bStoreRefBasePicFlag;
+  bool		bPrefixNalUnitAdditionalExtFlag;
+  bool		bPrefixNalUnitExtFlag;
 } SPrefixNalUnit, *PPrefixNalUnit;
 
 } // namespace WelsDec
--- a/codec/decoder/core/inc/nalu.h
+++ b/codec/decoder/core/inc/nalu.h
@@ -53,7 +53,7 @@
     SBitStringAux	sSliceBitsRead;
     uint8_t*		 pNalPos;	  // save the address of slice nal for GPU function
     int32_t 		iNalLength;   // save the nal length for GPU function
-    bool_t			bSliceHeaderExtFlag;
+    bool			bSliceHeaderExtFlag;
   } sVclNal;
   SPrefixNalUnit	sPrefixNal;
 } sNalData;
@@ -71,7 +71,7 @@
 uint32_t		uiCountUnitsNum;	// Count size number of malloced NAL Units in each AU list
 uint32_t		uiStartPos;
 uint32_t		uiEndPos;
-bool_t			bCompletedAuFlag;	// Indicate whether it is a completed AU
+bool			bCompletedAuFlag;	// Indicate whether it is a completed AU
 } SAccessUnit, *PAccessUnit;
 
 } // namespace WelsDec
--- a/codec/decoder/core/inc/parameter_sets.h
+++ b/codec/decoder/core/inc/parameter_sets.h
@@ -80,25 +80,25 @@
 uint8_t		uiBitDepthLuma;
 uint8_t		uiBitDepthChroma;
 /* TO BE CONTINUE: POC type 1 */
-bool_t		bDeltaPicOrderAlwaysZeroFlag;
-bool_t		bGapsInFrameNumValueAllowedFlag;
+bool		bDeltaPicOrderAlwaysZeroFlag;
+bool		bGapsInFrameNumValueAllowedFlag;
 
-bool_t		bFrameMbsOnlyFlag;
-bool_t		bMbaffFlag;	// MB Adapative Frame Field
-bool_t		bDirect8x8InferenceFlag;
-bool_t		bFrameCroppingFlag;
+bool		bFrameMbsOnlyFlag;
+bool		bMbaffFlag;	// MB Adapative Frame Field
+bool		bDirect8x8InferenceFlag;
+bool		bFrameCroppingFlag;
 
-bool_t		bVuiParamPresentFlag;
-//	bool_t		bTimingInfoPresentFlag;
-//	bool_t		bFixedFrameRateFlag;
-bool_t		bConstraintSet0Flag;
-bool_t		bConstraintSet1Flag;
-bool_t		bConstraintSet2Flag;
-bool_t		bConstraintSet3Flag;
-bool_t		bSeparateColorPlaneFlag;
-bool_t		bQpPrimeYZeroTransfBypassFlag;
-bool_t		bSeqScalingMatrixPresentFlag;
-bool_t		bSeqScalingListPresentFlag[12];
+bool		bVuiParamPresentFlag;
+//	bool		bTimingInfoPresentFlag;
+//	bool		bFixedFrameRateFlag;
+bool		bConstraintSet0Flag;
+bool		bConstraintSet1Flag;
+bool		bConstraintSet2Flag;
+bool		bConstraintSet3Flag;
+bool		bSeparateColorPlaneFlag;
+bool		bQpPrimeYZeroTransfBypassFlag;
+bool		bSeqScalingMatrixPresentFlag;
+bool		bSeqScalingListPresentFlag[12];
 const SLevelLimits *pSLevelLimits;
 } SSps, *PSps;
 
@@ -111,8 +111,8 @@
 //	int32_t		iAlphaTransparentValue;
 
 //	uint8_t		uiBitDepthAux;
-//	bool_t		bAlphaIncrFlag;
-//	bool_t		bAdditionalExtFlag;
+//	bool		bAlphaIncrFlag;
+//	bool		bAdditionalExtFlag;
 //}SSpsExt, *PSpsExt;
 
 /* Sequence Parameter Set extension syntax, refer to Page 391 in JVT X201wcm */
@@ -124,10 +124,10 @@
 uint8_t		uiChromaPhaseYPlus1;
 uint8_t		uiSeqRefLayerChromaPhaseXPlus1Flag;
 uint8_t		uiSeqRefLayerChromaPhaseYPlus1;
-bool_t		bInterLayerDeblockingFilterCtrlPresentFlag;
-bool_t		bSeqTCoeffLevelPredFlag;
-bool_t		bAdaptiveTCoeffLevelPredFlag;
-bool_t		bSliceHeaderRestrictionFlag;
+bool		bInterLayerDeblockingFilterCtrlPresentFlag;
+bool		bSeqTCoeffLevelPredFlag;
+bool		bAdaptiveTCoeffLevelPredFlag;
+bool		bSliceHeaderRestrictionFlag;
 } SSpsSvcExt, *PSpsSvcExt;
 
 /* Subset sequence parameter set syntax, refer to Page 391 in JVT X201wcm */
@@ -134,9 +134,9 @@
 typedef struct TagSubsetSps {
 SSps		sSps;
 SSpsSvcExt	sSpsSvcExt;
-bool_t		bSvcVuiParamPresentFlag;
-bool_t		bAdditionalExtension2Flag;
-bool_t		bAdditionalExtension2DataFlag;
+bool		bSvcVuiParamPresentFlag;
+bool		bAdditionalExtension2Flag;
+bool		bAdditionalExtension2DataFlag;
 } SSubsetSps, *PSubsetSps;
 
 /* Picture parameter set syntax, refer to Page 59 in JVT X201wcm */
@@ -164,15 +164,15 @@
 int32_t		iPicInitQs;
 int32_t		iChromaQpIndexOffset;
 
-bool_t		bEntropyCodingModeFlag;
-bool_t		bPicOrderPresentFlag;
+bool		bEntropyCodingModeFlag;
+bool		bPicOrderPresentFlag;
 /* slice_group_map_type = 3, 4 or 5 */
-bool_t		bSliceGroupChangeDirectionFlag;
-bool_t		bDeblockingFilterControlPresentFlag;
+bool		bSliceGroupChangeDirectionFlag;
+bool		bDeblockingFilterControlPresentFlag;
 
-bool_t		bConstainedIntraPredFlag;
-bool_t		bRedundantPicCntPresentFlag;
-bool_t		bWeightedPredFlag;
+bool		bConstainedIntraPredFlag;
+bool		bRedundantPicCntPresentFlag;
+bool		bWeightedPredFlag;
 uint8_t		uiWeightedBipredIdc;
 
 } SPps, *PPps;
--- a/codec/decoder/core/inc/parse_mb_syn_cavlc.h
+++ b/codec/decoder/core/inc/parse_mb_syn_cavlc.h
@@ -134,13 +134,13 @@
   {SUB_MB_TYPE_4x4, 4, 1},
 };
 
-void_t GetNeighborAvailMbType (PNeighAvail pNeighAvail, PDqLayer pCurLayer);
-void_t WelsFillCacheNonZeroCount (PNeighAvail pNeighAvail, uint8_t* pNonZeroCount, PDqLayer pCurLayer);
-void_t WelsFillCacheConstrain0Intra4x4 (PNeighAvail pNeighAvail, uint8_t* pNonZeroCount, int8_t* pIntraPredMode,
+void GetNeighborAvailMbType (PNeighAvail pNeighAvail, PDqLayer pCurLayer);
+void WelsFillCacheNonZeroCount (PNeighAvail pNeighAvail, uint8_t* pNonZeroCount, PDqLayer pCurLayer);
+void WelsFillCacheConstrain0Intra4x4 (PNeighAvail pNeighAvail, uint8_t* pNonZeroCount, int8_t* pIntraPredMode,
                                         PDqLayer pCurLayer);
-void_t WelsFillCacheConstrain1Intra4x4 (PNeighAvail pNeighAvail, uint8_t* pNonZeroCount, int8_t* pIntraPredMode,
+void WelsFillCacheConstrain1Intra4x4 (PNeighAvail pNeighAvail, uint8_t* pNonZeroCount, int8_t* pIntraPredMode,
                                         PDqLayer pCurLayer);
-void_t WelsFillCacheInter (PNeighAvail pNeighAvail, uint8_t* pNonZeroCount,
+void WelsFillCacheInter (PNeighAvail pNeighAvail, uint8_t* pNonZeroCount,
                            int16_t iMvArray[LIST_A][30][MV_A], int8_t iRefIdxArray[LIST_A][30], PDqLayer pCurLayer);
 
 
@@ -173,8 +173,8 @@
 int32_t PredIntra4x4Mode (int8_t* pIntraPredMode, int32_t iIdx4);
 
 
-void_t BsStartCavlc (PBitStringAux pBs);
-void_t BsEndCavlc (PBitStringAux pBs);
+void BsStartCavlc (PBitStringAux pBs);
+void BsEndCavlc (PBitStringAux pBs);
 
 int32_t WelsResidualBlockCavlc (SVlcTable* pVlcTable,
                                 uint8_t* pNonZeroCountCache,
--- a/codec/decoder/core/inc/picture.h
+++ b/codec/decoder/core/inc/picture.h
@@ -58,16 +58,16 @@
 int32_t		iFramePoc;		// frame POC
 
 /*******************************sef_definition for misc use****************************/
-bool_t		bUsedAsRef;							//for ref pic management
-bool_t		bIsLongRef;	// long term reference frame flag	//for ref pic management
+bool		bUsedAsRef;							//for ref pic management
+bool		bIsLongRef;	// long term reference frame flag	//for ref pic management
 uint8_t		uiRefCount;
-bool_t		bAvailableFlag;	// indicate whether it is available in this picture memory block.
+bool		bAvailableFlag;	// indicate whether it is available in this picture memory block.
 
 /*******************************for future use****************************/
 uint8_t		uiTemporalId;
 uint8_t		uiSpatialId;
 uint8_t		uiQualityId;
-bool_t		bRefBaseFlag;
+bool		bRefBaseFlag;
 
 int32_t		iFrameNum;		// frame number			//for ref pic management
 int32_t		iLongTermFrameIdx;					//id for long term ref pic
--- a/codec/decoder/core/inc/rec_mb.h
+++ b/codec/decoder/core/inc/rec_mb.h
@@ -49,7 +49,7 @@
 
 namespace WelsDec {
 
-void_t WelsFillRecNeededMbInfo (PWelsDecoderContext pCtx, bool_t bOutput, PDqLayer pCurLayer);
+void WelsFillRecNeededMbInfo (PWelsDecoderContext pCtx, bool bOutput, PDqLayer pCurLayer);
 
 int32_t RecI4x4Mb (int32_t iMBXY, PWelsDecoderContext pCtx, int16_t* pScoeffLevel, PDqLayer pDqLayer);
 
@@ -61,9 +61,9 @@
 
 int32_t RecChroma (int32_t iMBXY, PWelsDecoderContext pCtx, int16_t* pScoeffLevel, PDqLayer pDqLayer);
 
-void_t GetInterPred (uint8_t* pPredY, uint8_t* pPredCb, uint8_t* pPredCr, PWelsDecoderContext pCtx);
+void GetInterPred (uint8_t* pPredY, uint8_t* pPredCb, uint8_t* pPredCr, PWelsDecoderContext pCtx);
 
-void_t FillBufForMc (uint8_t* pBuf, int32_t iBufStride, uint8_t* pSrc, int32_t iSrcStride, int32_t iSrcOffset,
+void FillBufForMc (uint8_t* pBuf, int32_t iBufStride, uint8_t* pSrc, int32_t iSrcStride, int32_t iSrcOffset,
                      int32_t iBlockWidth, int32_t iBlockHeight, int32_t iSrcX, int32_t iSrcY, int32_t iPicWidth, int32_t iPicHeight);
 
 } // namespace WelsDec
--- a/codec/decoder/core/inc/slice.h
+++ b/codec/decoder/core/inc/slice.h
@@ -51,7 +51,7 @@
     uint16_t    uiLongTermPicNum;
     uint16_t    uiReorderingOfPicNumsIdc;
   } sReorderingSyn[LIST_A][MAX_REF_PIC_COUNT];
-  bool_t		bRefPicListReorderingFlag[LIST_A];
+  bool		bRefPicListReorderingFlag[LIST_A];
 } SRefPicListReorderSyn, *PRefPicListReorderSyn;
 
 /*
@@ -65,8 +65,8 @@
     int32_t iLumaOffset[MAX_REF_PIC_COUNT];
     int32_t	iChromaWeight[MAX_REF_PIC_COUNT][2];
     int32_t iChromaOffset[MAX_REF_PIC_COUNT][2];
-    bool_t	bLumaWeightFlag;
-    bool_t	bChromaWeightFlag;
+    bool	bLumaWeightFlag;
+    bool	bChromaWeightFlag;
   } sPredList[LIST_A];
 } SPredWeightTabSyn;
 
@@ -81,9 +81,9 @@
     int32_t	    iMaxLongTermFrameIdx;
   } sMmcoRef[MAX_MMCO_COUNT];
 
-  bool_t		bNoOutputOfPriorPicsFlag;
-  bool_t		bLongTermRefFlag;
-  bool_t		bAdaptiveRefPicMarkingModeFlag;
+  bool		bNoOutputOfPriorPicsFlag;
+  bool		bLongTermRefFlag;
+  bool		bAdaptiveRefPicMarkingModeFlag;
 } SRefPicMarking, *PRefPicMarking;
 
 /* Decode reference base picture marking syntax in Page 396 of JVT X201wcm */
@@ -95,7 +95,7 @@
     uint32_t	uiLongTermPicNum; //should uint32_t, cover larger range of iFrameNum.
   } mmco_base[MAX_MMCO_COUNT];	// MAX_REF_PIC for reference picture based on frame
 
-  bool_t		bAdaptiveRefBasePicMarkingModeFlag;
+  bool		bAdaptiveRefBasePicMarkingModeFlag;
 } SRefBasePicMarking, *PRefBasePicMarking;
 
 /* Header of slice syntax elements, refer to Page 63 in JVT X201wcm */
@@ -131,11 +131,11 @@
 
   uint16_t    uiIdrPicId;
   ESliceType	eSliceType;
-  bool_t		bNumRefIdxActiveOverrideFlag;
-  bool_t		bFieldPicFlag;		//not supported in base profile
-  bool_t		bBottomFiledFlag;		//not supported in base profile
+  bool		bNumRefIdxActiveOverrideFlag;
+  bool		bFieldPicFlag;		//not supported in base profile
+  bool		bBottomFiledFlag;		//not supported in base profile
   uint8_t		uiPadding1Byte;
-  bool_t		bSpForSwitchFlag;			// For SP/SI slices
+  bool		bSpForSwitchFlag;			// For SP/SI slices
   int16_t		iPadding2Bytes;
 } SSliceHeader, *PSliceHeader;
 
@@ -155,18 +155,18 @@
   int32_t		iScaledRefLayerPicHeightInSampleLuma;
 
   SRefBasePicMarking	sRefBasePicMarking;
-  bool_t		bBasePredWeightTableFlag;
-  bool_t		bStoreRefBasePicFlag;
-  bool_t		bConstrainedIntraResamplingFlag;
-  bool_t		bSliceSkipFlag;
+  bool		bBasePredWeightTableFlag;
+  bool		bStoreRefBasePicFlag;
+  bool		bConstrainedIntraResamplingFlag;
+  bool		bSliceSkipFlag;
 
-  bool_t		bAdaptiveBaseModeFlag;
-  bool_t		bDefaultBaseModeFlag;
-  bool_t		bAdaptiveMotionPredFlag;
-  bool_t		bDefaultMotionPredFlag;
-  bool_t		bAdaptiveResidualPredFlag;
-  bool_t		bDefaultResidualPredFlag;
-  bool_t		bTCoeffLevelPredFlag;
+  bool		bAdaptiveBaseModeFlag;
+  bool		bDefaultBaseModeFlag;
+  bool		bAdaptiveMotionPredFlag;
+  bool		bDefaultMotionPredFlag;
+  bool		bAdaptiveResidualPredFlag;
+  bool		bDefaultResidualPredFlag;
+  bool		bTCoeffLevelPredFlag;
   uint8_t		uiRefLayerChromaPhaseXPlus1Flag;
 
   uint8_t		uiRefLayerChromaPhaseYPlus1;
@@ -192,7 +192,7 @@
   /*slice_data_ext() generate*/
 
   /*******************************misc use****************************/
-  bool_t		bSliceHeaderExtFlag; // Indicate which slice header is used, avc or ext?
+  bool		bSliceHeaderExtFlag; // Indicate which slice header is used, avc or ext?
   /*************got from other layer for effiency if possible***************/
   /*from lower layer: slice header*/
   uint8_t		eSliceType;
--- a/codec/decoder/core/inc/utils.h
+++ b/codec/decoder/core/inc/utils.h
@@ -53,15 +53,15 @@
  *	Function pointer declaration for various tool sets
  */
 // wels log output
-typedef void_t (*PWelsLogCallbackFunc) (void_t* pPtr, const int32_t kiLevel, const char* kpFmt, va_list pArgv);
+typedef void (*PWelsLogCallbackFunc) (void* pPtr, const int32_t kiLevel, const char* kpFmt, va_list pArgv);
 
 extern PWelsLogCallbackFunc	g_pLog;
 
 #ifdef __GNUC__
-extern void_t WelsLog (void_t* pPtr, int32_t iLevel, const char* kpFmt, ...) __attribute__ ((__format__ (__printf__, 3,
+extern void WelsLog (void* pPtr, int32_t iLevel, const char* kpFmt, ...) __attribute__ ((__format__ (__printf__, 3,
     4)));
 #else
-extern void_t WelsLog (void_t* pPtr, int32_t iLevel, const char* kpFmt, ...);
+extern void WelsLog (void* pPtr, int32_t iLevel, const char* kpFmt, ...);
 #endif
 
 #define DECODER_MODE_NAME(a) ((a == SW_MODE)?"SW_MODE":((a == GPU_MODE)?"GPU_MODE":((a == AUTO_MODE)?"AUTO_MODE":"SWITCH_MODE")))
--- a/codec/decoder/core/inc/vlc_decoder.h
+++ b/codec/decoder/core/inc/vlc_decoder.h
@@ -116,7 +116,7 @@
 #define WELS_GET_PREFIX_BITS(inval, outval) outval = GetPrefixBits(inval)
 #endif
 
-static inline void_t InitVlcTable (SVlcTable* pVlcTable) {
+static inline void InitVlcTable (SVlcTable* pVlcTable) {
 pVlcTable->kpChromaCoeffTokenVlcTable = g_kuiVlcChromaTable;
 
 pVlcTable->kpCoeffTokenVlcTable[0][0] = g_kuiVlcTable_0;
--- a/codec/decoder/core/src/au_parser.cpp
+++ b/codec/decoder/core/src/au_parser.cpp
@@ -108,7 +108,7 @@
   uint8_t* pNal     = pSrcRbsp;
   int32_t iNalSize  = iSrcRbspLen;
   PBitStringAux pBs = NULL;
-  bool_t bExtensionFlag = false;
+  bool bExtensionFlag = false;
   int32_t iErr	= ERR_NONE;
   int32_t iBitSize = 0;
 
@@ -362,66 +362,66 @@
 }
 
 
-bool_t CheckAccessUnitBoundaryExt (PNalUnitHeaderExt pLastNalHdrExt, PNalUnitHeaderExt pCurNalHeaderExt,
+bool CheckAccessUnitBoundaryExt (PNalUnitHeaderExt pLastNalHdrExt, PNalUnitHeaderExt pCurNalHeaderExt,
                                    PSliceHeader pLastSliceHeader, PSliceHeader pCurSliceHeader) {
   const PSps kpSps = pCurSliceHeader->pSps;
 
   //Sub-clause 7.1.4.1.1 temporal_id
   if (pLastNalHdrExt->uiTemporalId != pCurNalHeaderExt->uiTemporalId) {
-    return TRUE;
+    return true;
   }
 
   // Subclause 7.4.1.2.5
   if (pLastSliceHeader->iRedundantPicCnt < pCurSliceHeader->iRedundantPicCnt)
-    return FALSE;
+    return false;
   else if (pLastSliceHeader->iRedundantPicCnt > pCurSliceHeader->iRedundantPicCnt)
-    return TRUE;
+    return true;
 
   // Subclause G7.4.1.2.4
   if (pLastNalHdrExt->uiDependencyId < pCurNalHeaderExt->uiDependencyId)
-    return FALSE;
+    return false;
   else if (pLastNalHdrExt->uiDependencyId > pCurNalHeaderExt->uiDependencyId)
-    return TRUE;
+    return true;
   if (pLastNalHdrExt->uiQualityId < pCurNalHeaderExt->uiQualityId)
-    return FALSE;
+    return false;
   else if (pLastNalHdrExt->uiQualityId > pCurNalHeaderExt->uiQualityId)
-    return TRUE;
+    return true;
 
   // Subclause 7.4.1.2.4
   if (pLastSliceHeader->iFrameNum != pCurSliceHeader->iFrameNum)
-    return TRUE;
+    return true;
   if (pLastSliceHeader->iPpsId != pCurSliceHeader->iPpsId)
-    return TRUE;
+    return true;
   if (pLastSliceHeader->bFieldPicFlag != pCurSliceHeader->bFieldPicFlag)
-    return TRUE;
+    return true;
   if (pLastSliceHeader->bBottomFiledFlag != pCurSliceHeader->bBottomFiledFlag)
-    return TRUE;
+    return true;
   if ((pLastNalHdrExt->sNalUnitHeader.uiNalRefIdc != NRI_PRI_LOWEST) != (pCurNalHeaderExt->sNalUnitHeader.uiNalRefIdc !=
       NRI_PRI_LOWEST))
-    return TRUE;
+    return true;
   if (pLastNalHdrExt->bIdrFlag != pCurNalHeaderExt->bIdrFlag)
-    return TRUE;
+    return true;
   if (pCurNalHeaderExt->bIdrFlag) {
     if (pLastSliceHeader->uiIdrPicId != pCurSliceHeader->uiIdrPicId)
-      return TRUE;
+      return true;
   }
   if (kpSps->uiPocType == 0) {
     if (pLastSliceHeader->iPicOrderCntLsb != pCurSliceHeader->iPicOrderCntLsb)
-      return TRUE;
+      return true;
     if (pLastSliceHeader->iDeltaPicOrderCntBottom != pCurSliceHeader->iDeltaPicOrderCntBottom)
-      return TRUE;
+      return true;
   } else if (kpSps->uiPocType == 1) {
     if (pLastSliceHeader->iDeltaPicOrderCnt[0] != pCurSliceHeader->iDeltaPicOrderCnt[0])
-      return TRUE;
+      return true;
     if (pLastSliceHeader->iDeltaPicOrderCnt[1] != pCurSliceHeader->iDeltaPicOrderCnt[1])
-      return TRUE;
+      return true;
   }
 
-  return FALSE;
+  return false;
 }
 
 
-bool_t CheckAccessUnitBoundary (const PNalUnit kpCurNal, const PNalUnit kpLastNal, const PSps kpSps) {
+bool CheckAccessUnitBoundary (const PNalUnit kpCurNal, const PNalUnit kpLastNal, const PSps kpSps) {
   const PNalUnitHeaderExt kpLastNalHeaderExt = &kpLastNal->sNalHeaderExt;
   const PNalUnitHeaderExt kpCurNalHeaderExt = &kpCurNal->sNalHeaderExt;
   const SSliceHeader* kpLastSliceHeader = &kpLastNal->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader;
@@ -429,56 +429,56 @@
 
   //Sub-clause 7.1.4.1.1 temporal_id
   if (kpLastNalHeaderExt->uiTemporalId != kpCurNalHeaderExt->uiTemporalId) {
-    return TRUE;
+    return true;
   }
 
   // Subclause 7.4.1.2.5
   if (kpLastSliceHeader->iRedundantPicCnt < kpCurSliceHeader->iRedundantPicCnt)
-    return FALSE;
+    return false;
   else if (kpLastSliceHeader->iRedundantPicCnt > kpCurSliceHeader->iRedundantPicCnt)
-    return TRUE;
+    return true;
 
   // Subclause G7.4.1.2.4
   if (kpLastNalHeaderExt->uiDependencyId < kpCurNalHeaderExt->uiDependencyId)
-    return FALSE;
+    return false;
   else if (kpLastNalHeaderExt->uiDependencyId > kpCurNalHeaderExt->uiDependencyId)
-    return TRUE;
+    return true;
   if (kpLastNalHeaderExt->uiQualityId < kpCurNalHeaderExt->uiQualityId)
-    return FALSE;
+    return false;
   else if (kpLastNalHeaderExt->uiQualityId > kpCurNalHeaderExt->uiQualityId)
-    return TRUE;
+    return true;
 
   // Subclause 7.4.1.2.4
   if (kpLastSliceHeader->iFrameNum != kpCurSliceHeader->iFrameNum)
-    return TRUE;
+    return true;
   if (kpLastSliceHeader->iPpsId != kpCurSliceHeader->iPpsId)
-    return TRUE;
+    return true;
   if (kpLastSliceHeader->bFieldPicFlag != kpCurSliceHeader->bFieldPicFlag)
-    return TRUE;
+    return true;
   if (kpLastSliceHeader->bBottomFiledFlag != kpCurSliceHeader->bBottomFiledFlag)
-    return TRUE;
+    return true;
   if ((kpLastNalHeaderExt->sNalUnitHeader.uiNalRefIdc != NRI_PRI_LOWEST) != (kpCurNalHeaderExt->sNalUnitHeader.uiNalRefIdc
       != NRI_PRI_LOWEST))
-    return TRUE;
+    return true;
   if (kpLastNalHeaderExt->bIdrFlag != kpCurNalHeaderExt->bIdrFlag)
-    return TRUE;
+    return true;
   if (kpCurNalHeaderExt->bIdrFlag) {
     if (kpLastSliceHeader->uiIdrPicId != kpCurSliceHeader->uiIdrPicId)
-      return TRUE;
+      return true;
   }
   if (kpSps->uiPocType == 0) {
     if (kpLastSliceHeader->iPicOrderCntLsb != kpCurSliceHeader->iPicOrderCntLsb)
-      return TRUE;
+      return true;
     if (kpLastSliceHeader->iDeltaPicOrderCntBottom != kpCurSliceHeader->iDeltaPicOrderCntBottom)
-      return TRUE;
+      return true;
   } else if (kpSps->uiPocType == 1) {
     if (kpLastSliceHeader->iDeltaPicOrderCnt[0] != kpCurSliceHeader->iDeltaPicOrderCnt[0])
-      return TRUE;
+      return true;
     if (kpLastSliceHeader->iDeltaPicOrderCnt[1] != kpCurSliceHeader->iDeltaPicOrderCnt[1])
-      return TRUE;
+      return true;
   }
 
-  return FALSE;
+  return false;
 }
 
 /*!
@@ -559,8 +559,8 @@
   return iErr;
 }
 
-void_t ParseRefBasePicMarking (PBitStringAux pBs, PRefBasePicMarking pRefBasePicMarking) {
-  const bool_t kbAdaptiveMarkingModeFlag = !!BsGetOneBit (pBs);
+void ParseRefBasePicMarking (PBitStringAux pBs, PRefBasePicMarking pRefBasePicMarking) {
+  const bool kbAdaptiveMarkingModeFlag = !!BsGetOneBit (pBs);
   pRefBasePicMarking->bAdaptiveRefBasePicMarkingModeFlag = kbAdaptiveMarkingModeFlag;
   if (kbAdaptiveMarkingModeFlag) {
     int32_t iIdx = 0;
@@ -583,7 +583,7 @@
   }
 }
 
-void_t ParsePrefixNalUnit (PWelsDecoderContext pCtx, PBitStringAux pBs) {
+void ParsePrefixNalUnit (PWelsDecoderContext pCtx, PBitStringAux pBs) {
   PNalUnit pCurNal = &pCtx->sPrefixNal;
 
   if (pCurNal->sNalHeaderExt.sNalUnitHeader.uiNalRefIdc != 0) {
@@ -670,7 +670,7 @@
   {2073600, 36864, 184320, 240000, 240000, -2048, 2047, 2, 16} /* level 5.2 */
 };
 
-const SLevelLimits *GetLevelLimits(int32_t iLevelIdx, bool_t bConstraint3) {
+const SLevelLimits *GetLevelLimits(int32_t iLevelIdx, bool bConstraint3) {
   switch (iLevelIdx) {
   case 10:
     return &g_kSLevelLimits[0];
@@ -737,8 +737,8 @@
   ProfileIdc	uiProfileIdc;
   uint8_t	uiLevelIdc;
   int32_t iSpsId;
-  bool_t bConstraintSetFlags[6] = { false };
-  const bool_t kbUseSubsetFlag   = IS_SUBSET_SPS_NAL (pNalHead->eNalUnitType);
+  bool bConstraintSetFlags[6] = { false };
+  const bool kbUseSubsetFlag   = IS_SUBSET_SPS_NAL (pNalHead->eNalUnitType);
 
 
   if (kbUseSubsetFlag) {	// SubsetSps
@@ -1030,7 +1030,7 @@
  * \note	Call it in case eNalUnitType is NAL_UNIT_SEI.
  *************************************************************************************
  */
-int32_t ParseSei (void_t* pSei, PBitStringAux pBsAux) {	// reserved Sei_Msg type
+int32_t ParseSei (void* pSei, PBitStringAux pBsAux) {	// reserved Sei_Msg type
 
 
   return ERR_NONE;
--- a/codec/decoder/core/src/bit_stream.cpp
+++ b/codec/decoder/core/src/bit_stream.cpp
@@ -47,7 +47,7 @@
   return uiValue;
 }
 
-void_t InitReadBits (PBitStringAux pBitString) {
+void InitReadBits (PBitStringAux pBitString) {
   pBitString->uiCurBits  = GetValue4Bytes (pBitString->pCurBuf);
   pBitString->pCurBuf  += 4;
   pBitString->iLeftBits = -16;
--- a/codec/decoder/core/src/deblocking.cpp
+++ b/codec/decoder/core/src/deblocking.cpp
@@ -143,7 +143,7 @@
 	tc[3] = g_kiTc0Table(iIndexA)[pBS[3]] + bChroma;\
 }
 
-void_t inline DeblockingBSInsideMBAvsbase (int8_t* pNnzTab, uint8_t nBS[2][4][4], int32_t iLShiftFactor) {
+void inline DeblockingBSInsideMBAvsbase (int8_t* pNnzTab, uint8_t nBS[2][4][4], int32_t iLShiftFactor) {
   uint32_t uiNnz32b0, uiNnz32b1, uiNnz32b2, uiNnz32b3;
 
   uiNnz32b0 = * (uint32_t*) (pNnzTab + 0);
@@ -172,7 +172,7 @@
 
 }
 
-void_t static inline DeblockingBSInsideMBNormal (PDqLayer pCurDqLayer, uint8_t nBS[2][4][4], int8_t* pNnzTab,
+void static inline DeblockingBSInsideMBNormal (PDqLayer pCurDqLayer, uint8_t nBS[2][4][4], int8_t* pNnzTab,
     int32_t iMbXy) {
   uint32_t uiNnz32b0, uiNnz32b1, uiNnz32b2, uiNnz32b3;
   int8_t* iRefIndex = pCurDqLayer->pRefIndex[LIST_0][iMbXy];
@@ -251,8 +251,8 @@
   int32_t iMbY = pCurDqLayer->iMbY;
   int32_t iMbX = pCurDqLayer->iMbX;
   int32_t iMbXy = pCurDqLayer->iMbXyIndex;
-  BOOL_T bLeftFlag = FALSE;
-  BOOL_T bTopFlag  = FALSE;
+  bool bLeftFlag = false;
+  bool bTopFlag  = false;
 
   if (2 == iFilterIdc) {
     bLeftFlag = (iMbX > 0) && (pCurDqLayer->pSliceIdc[iMbXy] == pCurDqLayer->pSliceIdc[iMbXy - 1]);
@@ -264,7 +264,7 @@
   return (bLeftFlag << LEFT_FLAG_BIT) | (bTopFlag << TOP_FLAG_BIT);
 }
 
-void_t FilteringEdgeLumaH (SDeblockingFilter* pFilter, uint8_t* pPix, int32_t iStride, uint8_t* pBS) {
+void FilteringEdgeLumaH (SDeblockingFilter* pFilter, uint8_t* pPix, int32_t iStride, uint8_t* pBS) {
   int32_t iIndexA;
   int32_t iAlpha;
   int32_t iBeta;
@@ -281,7 +281,7 @@
 }
 
 
-void_t FilteringEdgeLumaV (SDeblockingFilter* pFilter, uint8_t* pPix, int32_t iStride, uint8_t* pBS) {
+void FilteringEdgeLumaV (SDeblockingFilter* pFilter, uint8_t* pPix, int32_t iStride, uint8_t* pBS) {
   int32_t  iIndexA;
   int32_t  iAlpha;
   int32_t  iBeta;
@@ -298,7 +298,7 @@
 }
 
 
-void_t FilteringEdgeLumaIntraH (SDeblockingFilter* pFilter, uint8_t* pPix, int32_t iStride, uint8_t* pBS) {
+void FilteringEdgeLumaIntraH (SDeblockingFilter* pFilter, uint8_t* pPix, int32_t iStride, uint8_t* pBS) {
   int32_t iIndexA;
   int32_t iAlpha;
   int32_t iBeta;
@@ -312,7 +312,7 @@
   return;
 }
 
-void_t FilteringEdgeLumaIntraV (SDeblockingFilter* pFilter, uint8_t* pPix, int32_t iStride, uint8_t* pBS) {
+void FilteringEdgeLumaIntraV (SDeblockingFilter* pFilter, uint8_t* pPix, int32_t iStride, uint8_t* pBS) {
   int32_t iIndexA;
   int32_t iAlpha;
   int32_t iBeta;
@@ -325,7 +325,7 @@
   }
   return;
 }
-void_t FilteringEdgeChromaH (SDeblockingFilter* pFilter, uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride,
+void FilteringEdgeChromaH (SDeblockingFilter* pFilter, uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride,
                              uint8_t* pBS) {
   int32_t iIndexA;
   int32_t iAlpha;
@@ -341,7 +341,7 @@
   }
   return;
 }
-void_t FilteringEdgeChromaV (SDeblockingFilter* pFilter, uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride,
+void FilteringEdgeChromaV (SDeblockingFilter* pFilter, uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride,
                              uint8_t* pBS) {
   int32_t iIndexA;
   int32_t iAlpha;
@@ -358,7 +358,7 @@
   return;
 }
 
-void_t FilteringEdgeChromaIntraH (SDeblockingFilter* pFilter, uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride,
+void FilteringEdgeChromaIntraH (SDeblockingFilter* pFilter, uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride,
                                   uint8_t* pBS) {
   int32_t iIndexA;
   int32_t iAlpha;
@@ -373,7 +373,7 @@
   return;
 }
 
-void_t FilteringEdgeChromaIntraV (SDeblockingFilter* pFilter, uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride,
+void FilteringEdgeChromaIntraV (SDeblockingFilter* pFilter, uint8_t* pPixCb, uint8_t* pPixCr, int32_t iStride,
                                   uint8_t* pBS) {
   int32_t iIndexA;
   int32_t iAlpha;
@@ -389,7 +389,7 @@
 }
 
 
-void_t DeblockingInterMb (PDqLayer pCurDqLayer, PDeblockingFilter  pFilter, uint8_t nBS[2][4][4],
+void DeblockingInterMb (PDqLayer pCurDqLayer, PDeblockingFilter  pFilter, uint8_t nBS[2][4][4],
                           int32_t iBoundryFlag) {
   int32_t iMbXyIndex = pCurDqLayer->iMbXyIndex;
   int32_t iMbX = pCurDqLayer->iMbX;
@@ -471,7 +471,7 @@
   }
 }
 
-void_t FilteringEdgeLumaHV (PDqLayer pCurDqLayer, PDeblockingFilter  pFilter, int32_t iBoundryFlag) {
+void FilteringEdgeLumaHV (PDqLayer pCurDqLayer, PDeblockingFilter  pFilter, int32_t iBoundryFlag) {
   int32_t iMbXyIndex = pCurDqLayer->iMbXyIndex;
   int32_t iMbX      = pCurDqLayer->iMbX;
   int32_t iMbY      = pCurDqLayer->iMbY;
@@ -519,7 +519,7 @@
     pFilter->pLoopf->pfLumaDeblockingLT4Ver (&pDestY[ (3 << 2)*iLineSize], iLineSize, iAlpha, iBeta, iTc);
   }
 }
-void_t FilteringEdgeChromaHV (PDqLayer pCurDqLayer, PDeblockingFilter  pFilter, int32_t iBoundryFlag) {
+void FilteringEdgeChromaHV (PDqLayer pCurDqLayer, PDeblockingFilter  pFilter, int32_t iBoundryFlag) {
   int32_t iMbXyIndex     = pCurDqLayer->iMbXyIndex;
   int32_t iMbX      = pCurDqLayer->iMbX;
   int32_t iMbY      = pCurDqLayer->iMbY;
@@ -566,12 +566,12 @@
 }
 
 // merge h&v lookup table operation to save performance
-void_t DeblockingIntraMb (PDqLayer pCurDqLayer, PDeblockingFilter  pFilter, int32_t iBoundryFlag) {
+void DeblockingIntraMb (PDqLayer pCurDqLayer, PDeblockingFilter  pFilter, int32_t iBoundryFlag) {
   FilteringEdgeLumaHV (pCurDqLayer, pFilter, iBoundryFlag);
   FilteringEdgeChromaHV (pCurDqLayer, pFilter, iBoundryFlag);
 }
 
-void_t WelsDeblockingMb (PDqLayer pCurDqLayer, PDeblockingFilter  pFilter, int32_t iBoundryFlag) {
+void WelsDeblockingMb (PDqLayer pCurDqLayer, PDeblockingFilter  pFilter, int32_t iBoundryFlag) {
   uint8_t nBS[2][4][4] = { 0 };
 
   int32_t iMbXyIndex	= pCurDqLayer->iMbXyIndex;
@@ -623,7 +623,7 @@
  *
  * \return	NONE
  */
-void_t WelsDeblockingFilterSlice (PWelsDecoderContext pCtx, PDeblockingFilterMbFunc pDeblockMb) {
+void WelsDeblockingFilterSlice (PWelsDecoderContext pCtx, PDeblockingFilterMbFunc pDeblockMb) {
   PDqLayer pCurDqLayer = pCtx->pCurDqLayer;
   PSliceHeaderExt pSliceHeaderExt = &pCurDqLayer->sLayerInfo.sSliceInLayer.sSliceHeaderExt;
   int32_t iMbWidth  = pCurDqLayer->iMbWidth;
@@ -694,7 +694,7 @@
  * \return	NONE
  */
 
-void_t  DeblockingInit (SDeblockingFunc*  pFunc,  int32_t iCpu) {
+void  DeblockingInit (SDeblockingFunc*  pFunc,  int32_t iCpu) {
   pFunc->pfLumaDeblockingLT4Ver		= DeblockLumaLt4V_c;
   pFunc->pfLumaDeblockingEQ4Ver		= DeblockLumaEq4V_c;
   pFunc->pfLumaDeblockingLT4Hor		= DeblockLumaLt4H_c;
--- a/codec/decoder/core/src/decode_mb_aux.cpp
+++ b/codec/decoder/core/src/decode_mb_aux.cpp
@@ -43,7 +43,7 @@
 
 
 /* init pClip table to pClip the final dct data */
-void_t InitDctClipTable (void_t) {
+void InitDctClipTable (void) {
   uint8_t* p		        = &g_ClipTable[0];
   const int32_t kiLength	= MAX_NEG_CROP * sizeof (uint8_t);
   int32_t i               = 0;
@@ -65,7 +65,7 @@
 
 //NOTE::: p_RS should NOT be modified and it will lead to mismatch with JSVM.
 //        so should allocate kA array to store the temporary value (idct).
-void_t IdctResAddPred_c (uint8_t* pPred, const int32_t kiStride, int16_t* pRs) {
+void IdctResAddPred_c (uint8_t* pPred, const int32_t kiStride, int16_t* pRs) {
   int16_t iSrc[16];
 
   uint8_t* pDst			= pPred;
@@ -103,7 +103,7 @@
   }
 }
 
-void_t GetI4LumaIChromaAddrTable (int32_t* pBlockOffset, const int32_t kiYStride, const int32_t kiUVStride) {
+void GetI4LumaIChromaAddrTable (int32_t* pBlockOffset, const int32_t kiYStride, const int32_t kiUVStride) {
   int32_t* pOffset	   = pBlockOffset;
   int32_t i;
   const uint8_t kuiScan0 = g_kuiScan8[0];
--- a/codec/decoder/core/src/decode_slice.cpp
+++ b/codec/decoder/core/src/decode_slice.cpp
@@ -192,7 +192,7 @@
   return 0;
 }
 
-void_t WelsLumaDcDequantIdct (int16_t* pBlock, int32_t iQp) {
+void WelsLumaDcDequantIdct (int16_t* pBlock, int32_t iQp) {
   const int32_t kiQMul = g_kuiDequantCoeff[iQp][0];
 #define STRIDE 16
   int32_t i;
@@ -234,7 +234,7 @@
 #undef STRIDE
 }
 
-int32_t WelsMbIntraPredictionConstruction (PWelsDecoderContext pCtx, PDqLayer pCurLayer, bool_t bOutput) {
+int32_t WelsMbIntraPredictionConstruction (PWelsDecoderContext pCtx, PDqLayer pCurLayer, bool bOutput) {
 //seems IPCM should not enter this path
   int32_t iMbXy = pCurLayer->iMbXyIndex;
 
@@ -270,7 +270,7 @@
   return 0;
 }
 
-void_t WelsMbCopy (uint8_t* pDst, int32_t iStrideDst, uint8_t* pSrc, int32_t iStrideSrc,
+void WelsMbCopy (uint8_t* pDst, int32_t iStrideDst, uint8_t* pSrc, int32_t iStrideSrc,
                    int32_t iHeight, int32_t iWidth) {
   int32_t i;
   int32_t iOffsetDst = 0, iOffsetSrc = 0;
@@ -328,7 +328,7 @@
   return 0;
 }
 
-void_t WelsChromaDcIdct (int16_t* pBlock) {
+void WelsChromaDcIdct (int16_t* pBlock) {
   int32_t iStride = 32;
   int32_t iXStride = 16;
   int32_t iStride1 = iXStride + iStride;
@@ -351,7 +351,7 @@
   pBlk[iStride1] = (iE - iB) >> 1;
 }
 
-int32_t WelsDecodeSlice (PWelsDecoderContext pCtx, bool_t bFirstSliceInLayer, PNalUnit pNalCur) {
+int32_t WelsDecodeSlice (PWelsDecoderContext pCtx, bool bFirstSliceInLayer, PNalUnit pNalCur) {
   PDqLayer pCurLayer = pCtx->pCurDqLayer;
   PFmo pFmo = pCtx->pFmo;
   int32_t i, iRet;
@@ -1111,7 +1111,7 @@
   return 0;
 }
 
-void_t WelsBlockInit (int16_t* pBlock, int32_t iWidth, int32_t iHeight, int32_t iStride, uint8_t uiVal) {
+void WelsBlockInit (int16_t* pBlock, int32_t iWidth, int32_t iHeight, int32_t iStride, uint8_t uiVal) {
   int32_t i;
   int16_t* pDst = pBlock;
 
@@ -1121,7 +1121,7 @@
   }
 }
 
-void_t WelsBlockFuncInit (SBlockFunc*   pFunc,  int32_t iCpu) {
+void WelsBlockFuncInit (SBlockFunc*   pFunc,  int32_t iCpu) {
   pFunc->pWelsBlockZero16x16Func		= WelsBlockZero16x16_c;
   pFunc->pWelsBlockZero8x8Func	    = WelsBlockZero8x8_c;
   pFunc->pWelsSetNonZeroCountFunc	    = SetNonZeroCount_c;
@@ -1133,15 +1133,15 @@
   }
 #endif
 }
-void_t WelsBlockZero16x16_c (int16_t* pBlock, int32_t iStride) {
+void WelsBlockZero16x16_c (int16_t* pBlock, int32_t iStride) {
   WelsBlockInit (pBlock, 16, 16, iStride, 0);
 }
 
-void_t WelsBlockZero8x8_c (int16_t* pBlock, int32_t iStride) {
+void WelsBlockZero8x8_c (int16_t* pBlock, int32_t iStride) {
   WelsBlockInit (pBlock, 8, 8, iStride, 0);
 }
 
-void_t SetNonZeroCount_c (int16_t* pBlock, int8_t* pNonZeroCount) {
+void SetNonZeroCount_c (int16_t* pBlock, int8_t* pNonZeroCount) {
   int32_t i;
   int32_t iIndex;
 
--- a/codec/decoder/core/src/decoder.cpp
+++ b/codec/decoder/core/src/decoder.cpp
@@ -57,9 +57,9 @@
 
 extern PPicture AllocPicture (PWelsDecoderContext pCtx, const int32_t kiPicWidth, const int32_t kiPicHeight);
 
-extern void_t FreePicture (PPicture pPic);
+extern void FreePicture (PPicture pPic);
 
-inline void_t GetValueOf4Bytes (uint8_t* pDstNal, int32_t iDdstIdx) {
+inline void GetValueOf4Bytes (uint8_t* pDstNal, int32_t iDdstIdx) {
   ST32(pDstNal, iDdstIdx);
 }
 
@@ -98,7 +98,7 @@
   return 0;
 }
 
-static void_t DestroyPicBuff (PPicBuff* ppPicBuf) {
+static void DestroyPicBuff (PPicBuff* ppPicBuf) {
   PPicBuff pPicBuf = NULL;
 
   if (NULL == ppPicBuf || NULL == *ppPicBuf)
@@ -131,7 +131,7 @@
 /*
  * fill data fields in default for decoder context
  */
-void_t WelsDecoderDefaults (PWelsDecoderContext pCtx) {
+void WelsDecoderDefaults (PWelsDecoderContext pCtx) {
   int32_t iCpuCores               = 1;
   memset (pCtx, 0, sizeof (SWelsDecoderContext));	// fill zero first
 
@@ -177,11 +177,11 @@
  *	get size of reference picture list in target layer incoming, = (iNumRefFrames x 2)
  */
 static inline int32_t GetTargetRefListSize (PWelsDecoderContext pCtx) {
-  bool_t*  pSubsetSpsAvail = &pCtx->bSubspsAvailFlags[0];
-  bool_t*  pSpsAvail		= &pCtx->bSpsAvailFlags[0];
+  bool*  pSubsetSpsAvail = &pCtx->bSubspsAvailFlags[0];
+  bool*  pSpsAvail		= &pCtx->bSpsAvailFlags[0];
   int32_t iSubsetIdx		= -1;
   int32_t iSpsIdx			= -1;
-  bool_t  bExistSubsetSps = false;
+  bool  bExistSubsetSps = false;
   int32_t bExistSps		= false;
   int32_t iPos			= MAX_SPS_COUNT - 1;
   int32_t iNumRefFrames	= 0;
@@ -238,7 +238,7 @@
 
   int32_t iListIdx			= 0;	//, mb_blocks	= 0;
   int32_t	iPicQueueSize		= 0;	// adaptive size of picture queue, = (pSps->iNumRefFrames x 2)
-  bool_t  bNeedChangePicQueue	= true;
+  bool  bNeedChangePicQueue	= true;
 
   WELS_VERIFY_RETURN_IF (ERR_INFO_INVALID_PARAM, (NULL == pCtx || kiPicWidth <= 0 || kiPicHeight <= 0))
 
@@ -282,7 +282,7 @@
 /*
  *	free memory blocks in avc
  */
-void_t WelsFreeMem (PWelsDecoderContext pCtx) {
+void WelsFreeMem (PWelsDecoderContext pCtx) {
   int32_t iListIdx = 0;
 
   /* TODO: free memory blocks introduced in avc */
@@ -308,7 +308,7 @@
 /*!
  * \brief	Open decoder
  */
-void_t WelsOpenDecoder (PWelsDecoderContext pCtx) {
+void WelsOpenDecoder (PWelsDecoderContext pCtx) {
   // function pointers
   //initial MC function pointer--
   InitMcFunc (& (pCtx->sMcFunc), pCtx->uiCpuFlag);
@@ -333,7 +333,7 @@
 /*!
  * \brief	Close decoder
  */
-void_t WelsCloseDecoder (PWelsDecoderContext pCtx) {
+void WelsCloseDecoder (PWelsDecoderContext pCtx) {
   WelsFreeMem (pCtx);
 
   WelsFreeMemory (pCtx);
@@ -350,7 +350,7 @@
 /*!
  * \brief	configure decoder parameters
  */
-int32_t DecoderConfigParam (PWelsDecoderContext pCtx, const void_t* kpParam) {
+int32_t DecoderConfigParam (PWelsDecoderContext pCtx, const void* kpParam) {
   if (NULL == pCtx || NULL == kpParam)
     return 1;
 
@@ -387,7 +387,7 @@
  * \note	N/A
  *************************************************************************************
  */
-int32_t WelsInitDecoder (PWelsDecoderContext pCtx, void_t* pTraceHandle, PWelsLogCallbackFunc pLog) {
+int32_t WelsInitDecoder (PWelsDecoderContext pCtx, void* pTraceHandle, PWelsLogCallbackFunc pLog) {
   if (pCtx == NULL) {
     return ERR_INFO_INVALID_PTR;
   }
@@ -423,12 +423,12 @@
  * \note	N/A
  *************************************************************************************
  */
-void_t WelsEndDecoder (PWelsDecoderContext pCtx) {
+void WelsEndDecoder (PWelsDecoderContext pCtx) {
   // close decoder
   WelsCloseDecoder (pCtx);
 }
 
-void_t GetVclNalTemporalId (PWelsDecoderContext pCtx) {
+void GetVclNalTemporalId (PWelsDecoderContext pCtx) {
   PAccessUnit pAccessUnit = pCtx->pAccessUnitList;
   int32_t idx = pAccessUnit->uiStartPos;
 
@@ -661,7 +661,7 @@
   return iErr;
 }
 
-void_t AssignFuncPointerForRec (PWelsDecoderContext pCtx) {
+void AssignFuncPointerForRec (PWelsDecoderContext pCtx) {
   pCtx->pGetI16x16LumaPredFunc[I16_PRED_V     ] = WelsI16x16LumaPredV_c;
   pCtx->pGetI16x16LumaPredFunc[I16_PRED_H     ] = WelsI16x16LumaPredH_c;
   pCtx->pGetI16x16LumaPredFunc[I16_PRED_DC    ] = WelsI16x16LumaPredDc_c;
--- a/codec/decoder/core/src/decoder_core.cpp
+++ b/codec/decoder/core/src/decoder_core.cpp
@@ -105,7 +105,7 @@
   return 0;
 }
 
-inline BOOL_T    CheckSliceNeedReconstruct (int16_t iCurDid, int16_t iCurQid, bool_t bStoreRefBasePicFlag,
+inline bool    CheckSliceNeedReconstruct (int16_t iCurDid, int16_t iCurQid, bool bStoreRefBasePicFlag,
     uint8_t uiDidMax, uint8_t uiLayerDqId, uint8_t uiTargetDqId) {
   return ((iCurDid == uiDidMax) && (iCurQid == BASE_QUALITY_ID) && (bStoreRefBasePicFlag))   // store base
          || (uiLayerDqId == uiTargetDqId); // target layer
@@ -118,7 +118,7 @@
 }
 
 
-inline void_t    HandleReferenceLostL0 (PWelsDecoderContext pCtx, PNalUnit pCurNal) {
+inline void    HandleReferenceLostL0 (PWelsDecoderContext pCtx, PNalUnit pCurNal) {
   if (0 == pCurNal->sNalHeaderExt.uiTemporalId) {
     pCtx->bReferenceLostAtT0Flag = true;
   }
@@ -130,7 +130,7 @@
   pCtx->iErrorCode |= dsBitstreamError;
 }
 
-inline void_t    HandleReferenceLost (PWelsDecoderContext pCtx, PNalUnit pCurNal) {
+inline void    HandleReferenceLost (PWelsDecoderContext pCtx, PNalUnit pCurNal) {
   if ((0 == pCurNal->sNalHeaderExt.uiTemporalId) || (1 == pCurNal->sNalHeaderExt.uiTemporalId)) {
     pCtx->bReferenceLostAtT0Flag = true;
   }
@@ -201,7 +201,7 @@
 }
 
 int32_t ParseDecRefPicMarking (PWelsDecoderContext pCtx, PBitStringAux pBs, PSliceHeader pSh, PSps pSps,
-                               const bool_t kbIdrFlag) {
+                               const bool kbIdrFlag) {
   PRefPicMarking const kpRefMarking = &pSh->sRefMarking;
 
   if (kbIdrFlag) {
@@ -238,7 +238,7 @@
   return ERR_NONE;
 }
 
-bool_t FillDefaultSliceHeaderExt (PSliceHeaderExt pShExt, PNalUnitHeaderExt pNalExt) {
+bool FillDefaultSliceHeaderExt (PSliceHeaderExt pShExt, PNalUnitHeaderExt pNalExt) {
   if (pShExt == NULL || pNalExt == NULL)
     return false;
 
@@ -309,7 +309,7 @@
  * Free memory introduced in WelsInitMemory at destruction of decoder.
  *
  */
-void_t WelsFreeMemory (PWelsDecoderContext pCtx) {
+void WelsFreeMemory (PWelsDecoderContext pCtx) {
   if (pCtx == NULL)
     return;
 
@@ -337,7 +337,7 @@
  *	pNal:	target NALUnit ptr
  *	pSrc:	NAL Unit bitstream
  */
-void_t DecodeNalHeaderExt (PNalUnit pNal, uint8_t* pSrc) {
+void DecodeNalHeaderExt (PNalUnit pNal, uint8_t* pSrc) {
   PNalUnitHeaderExt pHeaderExt = &pNal->sNalHeaderExt;
 
   uint8_t uiCurByte = *pSrc;
@@ -392,7 +392,7 @@
 }
 
 int32_t CheckSpsId (PWelsDecoderContext pCtx, PSubsetSps* ppSubsetSps, PSps* ppSps, int32_t iSpsId,
-                    bool_t bExtensionFlag) {
+                    bool bExtensionFlag) {
   PSps pSpsList = pCtx->sSpsBuffer;
   PSubsetSps pSubspsList = pCtx->sSubsetSpsBuffer;
 
@@ -455,7 +455,7 @@
  *	decode_slice_header_avc
  *	Parse slice header of bitstream in avc for storing data structure
  */
-int32_t ParseSliceHeaderSyntaxs (PWelsDecoderContext pCtx, PBitStringAux pBs, const bool_t kbExtensionFlag) {
+int32_t ParseSliceHeaderSyntaxs (PWelsDecoderContext pCtx, PBitStringAux pBs, const bool kbExtensionFlag) {
   PNalUnit const kpCurNal				= pCtx->pAccessUnitList->pNalUnitsList[pCtx->pAccessUnitList->uiAvailUnitsNum - 1];
 
   PNalUnitHeaderExt pNalHeaderExt	= NULL;
@@ -469,8 +469,8 @@
   int32_t iRet						= ERR_NONE;
   uint8_t uiSliceType				= 0;
   uint8_t uiQualityId					= BASE_QUALITY_ID;
-  bool_t	bIdrFlag					= false;
-  bool_t	bSgChangeCycleInvolved	= false;	// involved slice group change cycle ?
+  bool	bIdrFlag					= false;
+  bool	bSgChangeCycleInvolved	= false;	// involved slice group change cycle ?
 
   if (kpCurNal == NULL) {
     return ERR_INFO_OUT_OF_MEMORY;
@@ -484,7 +484,7 @@
 
   if (pSliceHeadExt) {
     SRefBasePicMarking sBaseMarking;
-    const bool_t kbStoreRefBaseFlag = pSliceHeadExt->bStoreRefBasePicFlag;
+    const bool kbStoreRefBaseFlag = pSliceHeadExt->bStoreRefBasePicFlag;
     memcpy (&sBaseMarking, &pSliceHeadExt->sRefBasePicMarking, sizeof (SRefBasePicMarking)); //confirmed_safe_unsafe_usage
     memset (pSliceHeadExt, 0, sizeof (SSliceHeaderExt));
     pSliceHeadExt->bStoreRefBasePicFlag	= kbStoreRefBaseFlag;
@@ -619,7 +619,7 @@
   if (kbExtensionFlag) {
     uiQualityId = pNalHeaderExt->uiQualityId;
   } else if (uiSliceType == P_SLICE || uiSliceType == SP_SLICE || uiSliceType == B_SLICE) {
-    const bool_t kbBipredFlag = (B_SLICE == uiSliceType);
+    const bool kbBipredFlag = (B_SLICE == uiSliceType);
     if (kbBipredFlag) {
       WelsLog (pCtx, WELS_LOG_WARNING, "ParseSliceHeaderSyntaxs(): kbBipredFlag = 1 not supported.\n");
       return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_UNSUPPORTED_BIPRED);
@@ -820,7 +820,7 @@
  *	pSrc:	mark as decoded prefix NAL
  *	ppDst:	succeeded VCL NAL based AVC (I/P Slice)
  */
-bool_t PrefetchNalHeaderExtSyntax (PWelsDecoderContext pCtx, PNalUnit const kppDst, PNalUnit const kpSrc) {
+bool PrefetchNalHeaderExtSyntax (PWelsDecoderContext pCtx, PNalUnit const kppDst, PNalUnit const kpSrc) {
   PNalUnitHeaderExt pNalHdrExtD	= NULL, pNalHdrExtS = NULL;
   PSliceHeaderExt pShExtD = NULL;
   PPrefixNalUnit pPrefixS = NULL;
@@ -1029,7 +1029,7 @@
   return ERR_NONE;
 }
 
-void_t UninitialDqLayersContext (PWelsDecoderContext pCtx) {
+void UninitialDqLayersContext (PWelsDecoderContext pCtx) {
   int32_t i = 0;
   int32_t j = 0;
 
@@ -1183,7 +1183,7 @@
   pCtx->bInitialDqLayersMem	= false;
 }
 
-void_t ResetCurrentAccessUnit (PWelsDecoderContext pCtx) {
+void ResetCurrentAccessUnit (PWelsDecoderContext pCtx) {
   PAccessUnit pCurAu = pCtx->pAccessUnitList;
 
   pCurAu->uiEndPos		= 0;
@@ -1211,7 +1211,7 @@
  * \author
  * \history	11/16/2009
  */
-void_t ForceResetCurrentAccessUnit (PAccessUnit pAu) {
+void ForceResetCurrentAccessUnit (PAccessUnit pAu) {
   uint32_t uiSucAuIdx	= pAu->uiEndPos + 1;
   uint32_t uiCurAuIdx	= 0;
 
@@ -1235,13 +1235,13 @@
 }
 
 //clear current corrupted NAL from pNalUnitsList
-void_t ForceClearCurrentNal (PAccessUnit pAu) {
+void ForceClearCurrentNal (PAccessUnit pAu) {
   if (pAu->uiAvailUnitsNum > 0)
     -- pAu->uiAvailUnitsNum;
 }
 
 
-void_t CheckAvailNalUnitsListContinuity (PWelsDecoderContext pCtx, int32_t iStartIdx, int32_t iEndIdx) {
+void CheckAvailNalUnitsListContinuity (PWelsDecoderContext pCtx, int32_t iStartIdx, int32_t iEndIdx) {
   PAccessUnit pCurAu = pCtx->pAccessUnitList;
 
   uint8_t uiLastNuDependencyId, uiLastNuLayerDqId;
@@ -1284,7 +1284,7 @@
 
 //main purpose: to support multi-slice and to include all slice which have the same uiDependencyId, uiQualityId and frame_num
 //for single slice, pIdxNoInterLayerPred SHOULD NOT be modified
-void_t RefineIdxNoInterLayerPred (PAccessUnit pCurAu, int32_t* pIdxNoInterLayerPred) {
+void RefineIdxNoInterLayerPred (PAccessUnit pCurAu, int32_t* pIdxNoInterLayerPred) {
   int32_t iLastNalDependId  = pCurAu->pNalUnitsList[*pIdxNoInterLayerPred]->sNalHeaderExt.uiDependencyId;
   int32_t iLastNalQualityId = pCurAu->pNalUnitsList[*pIdxNoInterLayerPred]->sNalHeaderExt.uiQualityId;
   uint8_t uiLastNalTId       = pCurAu->pNalUnitsList[*pIdxNoInterLayerPred]->sNalHeaderExt.uiTemporalId;
@@ -1297,7 +1297,7 @@
   int32_t iCurNalDependId, iCurNalQualityId, iCurNalTId, iCurNalFrameNum, iCurNalPoc, iCurNalFirstMb, iCurIdx,
           iFinalIdxNoInterLayerPred;
 
-  bool_t  bMultiSliceFind = false;
+  bool  bMultiSliceFind = false;
 
   iFinalIdxNoInterLayerPred = 0;
   iCurIdx = *pIdxNoInterLayerPred - 1;
@@ -1332,7 +1332,7 @@
   }
 }
 
-bool_t CheckPocOfCurValidNalUnits (PAccessUnit pCurAu, int32_t pIdxNoInterLayerPred) {
+bool CheckPocOfCurValidNalUnits (PAccessUnit pCurAu, int32_t pIdxNoInterLayerPred) {
   int32_t iEndIdx    = pCurAu->uiEndPos;
   int32_t iCurAuPoc =
     pCurAu->pNalUnitsList[pIdxNoInterLayerPred]->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader.iPicOrderCntLsb;
@@ -1347,7 +1347,7 @@
   return true;
 }
 
-bool_t CheckIntegrityNalUnitsList (PWelsDecoderContext pCtx) {
+bool CheckIntegrityNalUnitsList (PWelsDecoderContext pCtx) {
   PAccessUnit pCurAu = pCtx->pAccessUnitList;
   const int32_t kiEndPos = pCurAu->uiEndPos;
   int32_t iIdxNoInterLayerPred = 0;
@@ -1391,7 +1391,7 @@
       pCurAu->pNalUnitsList[pCurAu->uiEndPos]->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader.iMbHeight << 4;
   } else { //P_SLICE
     //step 1: search uiDependencyId equal to pCtx->cur_seq_interval_target_dependency_id
-    bool_t bGetDependId = false;
+    bool bGetDependId = false;
     int32_t iIdxDependId = 0;
 
     iIdxDependId = kiEndPos;
@@ -1406,7 +1406,7 @@
 
     //step 2: switch according to whether or not find the index of pNalUnit whose uiDependencyId equal to iCurSeqIntervalTargetDependId
     if (bGetDependId) { //get the index of pNalUnit whose uiDependencyId equal to iCurSeqIntervalTargetDependId
-      bool_t bGetNoInterPredFront = false;
+      bool bGetNoInterPredFront = false;
       //step 2a: search iNoInterLayerPredFlag [0....iIdxDependId]
       iIdxNoInterLayerPred = iIdxDependId;
       while (iIdxNoInterLayerPred >= 0) {
@@ -1471,7 +1471,7 @@
   return true;
 }
 
-void_t CheckOnlyOneLayerInAu (PWelsDecoderContext pCtx) {
+void CheckOnlyOneLayerInAu (PWelsDecoderContext pCtx) {
   PAccessUnit pCurAu = pCtx->pAccessUnitList;
 
   int32_t iEndIdx = pCurAu->uiEndPos;
@@ -1524,7 +1524,7 @@
   return ERR_NONE;
 }
 
-void_t WelsDecodeAccessUnitEnd (PWelsDecoderContext pCtx) {
+void WelsDecodeAccessUnitEnd (PWelsDecoderContext pCtx) {
   // uninitialize context of current access unit and rbsp buffer clean
   ResetCurrentAccessUnit (pCtx);
 }
@@ -1596,7 +1596,7 @@
   return 0;
 }
 
-static inline void_t InitDqLayerInfo (PDqLayer pDqLayer, PLayerInfo pLayerInfo, PNalUnit pNalUnit, PPicture pPicDec) {
+static inline void InitDqLayerInfo (PDqLayer pDqLayer, PLayerInfo pLayerInfo, PNalUnit pNalUnit, PPicture pPicDec) {
   PNalUnitHeaderExt pNalHdrExt    = &pNalUnit->sNalHeaderExt;
   PSliceHeaderExt pShExt			= &pNalUnit->sNalData.sVclNal.sSliceHeaderExt;
   PSliceHeader        pSh			= &pShExt->sSliceHeader;
@@ -1634,7 +1634,7 @@
   pDqLayer->bUseRefBasePicFlag	= pNalHdrExt->bUseRefBasePicFlag;
 }
 
-void_t WelsDqLayerDecodeStart (PWelsDecoderContext pCtx, PNalUnit pCurNal, PSps pSps, PPps pPps) {
+void WelsDqLayerDecodeStart (PWelsDecoderContext pCtx, PNalUnit pCurNal, PSps pSps, PPps pPps) {
   SNalUnitHeader* pNalHdr = &pCurNal->sNalHeaderExt.sNalUnitHeader;
   PSliceHeader pSh = &pCurNal->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader;
 
@@ -1650,7 +1650,7 @@
   }
 }
 
-int32_t InitRefPicList (PWelsDecoderContext pCtx, const uint8_t kuiNRi, const bool_t kbFirstSlice, int32_t iPoc) {
+int32_t InitRefPicList (PWelsDecoderContext pCtx, const uint8_t kuiNRi, const bool kbFirstSlice, int32_t iPoc) {
   int32_t iRet = ERR_NONE;
   if (kbFirstSlice)
     iRet = WelsInitRefList (pCtx, iPoc);
@@ -1661,7 +1661,7 @@
   return iRet;
 }
 
-void_t InitCurDqLayerData (PWelsDecoderContext pCtx, PDqLayer pCurDq) {
+void InitCurDqLayerData (PWelsDecoderContext pCtx, PDqLayer pCurDq) {
   if (NULL != pCtx && NULL != pCurDq) {
     pCurDq->pCsData[0]		= pCtx->pCsListXchg[0][0];
     pCurDq->pCsData[1]		= pCtx->pCsListXchg[0][1];
@@ -1691,7 +1691,7 @@
 
 // added to reset state of parameter sets to waiting successive incoming IDR, 6/4/2010
 // It will be called in case packets lost/ broken and decoded failed at temporal level 0
-void_t ResetParameterSetsState (PWelsDecoderContext pCtx) {
+void ResetParameterSetsState (PWelsDecoderContext pCtx) {
   pCtx->bSpsExistAheadFlag	   = false;
   pCtx->bSubspsExistAheadFlag = false;
   pCtx->bPpsExistAheadFlag	   = false;
@@ -1718,7 +1718,7 @@
   int16_t iLastIdD = -1, iLastIdQ = -1;
   int16_t iCurrIdD = 0, iCurrIdQ = 0;
   uint8_t uiNalRefIdc = 0;
-  bool_t	bFreshSliceAvailable =
+  bool	bFreshSliceAvailable =
     true;	// Another fresh slice comingup for given dq layer, for multiple slices in case of header parts of slices sometimes loss over error-prone channels, 8/14/2008
   PPicture  pStoreBasePic = NULL;
 
@@ -1774,7 +1774,7 @@
      *	Loop decoding for slices (even FMO and/ multiple slices) within a dq layer
      */
     while (iIdx <= iEndIdx) {
-      BOOL_T         bReconstructSlice;
+      bool         bReconstructSlice;
       iCurrIdQ	= pNalCur->sNalHeaderExt.uiQualityId;
       iCurrIdD	= pNalCur->sNalHeaderExt.uiDependencyId;
       pSh		= &pNalCur->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader;
@@ -1823,7 +1823,7 @@
         InitDqLayerInfo (dq_cur, &pLayerInfo, pNalCur, pCtx->pDec);
 
         if (!dq_cur->sLayerInfo.pSps->bGapsInFrameNumValueAllowedFlag) {
-          const bool_t kbIdrFlag = dq_cur->sLayerInfo.sNalHeaderExt.bIdrFlag
+          const bool kbIdrFlag = dq_cur->sLayerInfo.sNalHeaderExt.bIdrFlag
                                    || (dq_cur->sLayerInfo.sNalHeaderExt.sNalUnitHeader.eNalUnitType == NAL_UNIT_CODED_SLICE_IDR);
           // Subclause 8.2.5.2 Decoding process for gaps in frame_num
           if (!kbIdrFlag  &&
--- a/codec/decoder/core/src/expand_pic.cpp
+++ b/codec/decoder/core/src/expand_pic.cpp
@@ -37,7 +37,7 @@
 namespace WelsDec {
 
 // rewrite it (split into luma & chroma) that is helpful for mmx/sse2 optimization perform, 9/27/2009
-static inline void_t ExpandPictureLuma_c (uint8_t* pDst, const int32_t kiStride, const int32_t kiPicWidth,
+static inline void ExpandPictureLuma_c (uint8_t* pDst, const int32_t kiStride, const int32_t kiPicWidth,
     const int32_t kiPicHeight) {
   uint8_t* pTmp				= pDst;
   uint8_t* pDstLastLine		= pTmp + (kiPicHeight - 1) * kiStride;
@@ -77,7 +77,7 @@
   } while (i < kiPicHeight);
 }
 
-static inline void_t ExpandPictureChroma_c (uint8_t* pDst, const int32_t kiStride, const int32_t kiPicWidth,
+static inline void ExpandPictureChroma_c (uint8_t* pDst, const int32_t kiStride, const int32_t kiPicWidth,
     const int32_t kiPicHeight) {
   uint8_t* pTmp				= pDst;
   uint8_t* pDstLastLine		= pTmp + (kiPicHeight - 1) * kiStride;
@@ -117,7 +117,7 @@
   } while (i < kiPicHeight);
 }
 
-void_t InitExpandPictureFunc (SExpandPicFunc* pExpandPicFunc, const uint32_t kuiCpuFlags) {
+void InitExpandPictureFunc (SExpandPicFunc* pExpandPicFunc, const uint32_t kuiCpuFlags) {
   pExpandPicFunc->pExpandLumaPicture	= ExpandPictureLuma_c;
   pExpandPicFunc->pExpandChromaPicture[0] = ExpandPictureChroma_c;
   pExpandPicFunc->pExpandChromaPicture[1] = ExpandPictureChroma_c;
@@ -131,7 +131,7 @@
 #endif//X86_ASM
 }
 
-void_t ExpandReferencingPicture (PPicture pPic, PExpandPictureFunc pExpLuma, PExpandPictureFunc pExpChroma[2]) {
+void ExpandReferencingPicture (PPicture pPic, PExpandPictureFunc pExpLuma, PExpandPictureFunc pExpChroma[2]) {
   /*local variable*/
   uint8_t* pPicY = pPic->pData[0];
   uint8_t* pPicCb = pPic->pData[1];
@@ -144,7 +144,7 @@
   pExpLuma (pPicY, pPic->iLinesize[0], kiWidthY, kiHeightY);
   if (kiWidthUV >= 16) {
     // fix coding picture size as 16x16 issues 7/27/2010
-    const bool_t kbChrAligned = /*(kiWidthUV >= 16) && */ ((kiWidthUV & 0x0F) == 0);	// chroma planes: (16+kiWidthUV) & 15
+    const bool kbChrAligned = /*(kiWidthUV >= 16) && */ ((kiWidthUV & 0x0F) == 0);	// chroma planes: (16+kiWidthUV) & 15
     pExpChroma[kbChrAligned] (pPicCb, pPic->iLinesize[1], kiWidthUV, kiHeightUV);
     pExpChroma[kbChrAligned] (pPicCr, pPic->iLinesize[2], kiWidthUV, kiHeightUV);
   } else {
--- a/codec/decoder/core/src/fmo.cpp
+++ b/codec/decoder/core/src/fmo.cpp
@@ -119,7 +119,7 @@
     const int32_t kiMbHeight) {
   int32_t iNumMb	= 0;
   int32_t iErr		= 0;
-  bool_t	bResolutionChanged = false;
+  bool	bResolutionChanged = false;
 
   // the cases we would not like
   WELS_VERIFY_RETURN_IF (1, (NULL == pFmo || NULL == kpPps))
@@ -200,7 +200,7 @@
  *
  * \return	NONE
  */
-void_t UninitFmoList (PFmo pFmo, const int32_t kiCnt, const int32_t kiAvail) {
+void UninitFmoList (PFmo pFmo, const int32_t kiCnt, const int32_t kiAvail) {
   PFmo pIter = pFmo;
   int32_t i = 0;
   int32_t iFreeNodes = 0;
@@ -238,7 +238,7 @@
  *
  * \return	true - changed or not initialized yet; false - not change at all
  */
-bool_t FmoParamSetsChanged (PFmo pFmo, const int32_t kiCountNumMb, const int32_t kiSliceGroupType,
+bool FmoParamSetsChanged (PFmo pFmo, const int32_t kiCountNumMb, const int32_t kiSliceGroupType,
                             const int32_t kiSliceGroupCount) {
   WELS_VERIFY_RETURN_IF (false, (NULL == pFmo))
 
@@ -258,7 +258,7 @@
  *
  * \return	true - update/insert successfully; false - failed;
  */
-bool_t FmoParamUpdate (PFmo pFmo, PSps pSps, PPps pPps, int32_t* pActiveFmoNum) {
+bool FmoParamUpdate (PFmo pFmo, PSps pSps, PPps pPps, int32_t* pActiveFmoNum) {
   const uint32_t kuiMbWidth = pSps->iMbWidth;
   const uint32_t kuiMbHeight = pSps->iMbHeight;
 
@@ -330,4 +330,4 @@
   return iNextMb;
 }
 
-} // namespace WelsDec
\ No newline at end of file
+} // namespace WelsDec
--- a/codec/decoder/core/src/get_intra_predictor.cpp
+++ b/codec/decoder/core/src/get_intra_predictor.cpp
@@ -51,7 +51,7 @@
 #define I8x8_COUNT 8
 #define I16x16_COUNT 16
 
-void_t WelsI4x4LumaPredV_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI4x4LumaPredV_c (uint8_t* pPred, const int32_t kiStride) {
   const uint32_t kuiVal = LD32 (pPred - kiStride);
 
   ST32 (pPred						    , kuiVal);
@@ -60,7 +60,7 @@
   ST32 (pPred + (kiStride << 1) + kiStride	, kuiVal);
 }
 
-void_t WelsI4x4LumaPredH_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI4x4LumaPredH_c (uint8_t* pPred, const int32_t kiStride) {
   const int32_t kiStride2 = kiStride << 1;
   const int32_t kiStride3 = kiStride2 + kiStride;
   const uint32_t kuiL0 = 0x01010101U * pPred[-1          ];
@@ -74,7 +74,7 @@
   ST32 (pPred + kiStride3, kuiL3);
 }
 
-void_t WelsI4x4LumaPredDc_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI4x4LumaPredDc_c (uint8_t* pPred, const int32_t kiStride) {
   const int32_t kiStride2	= kiStride << 1;
   const int32_t kiStride3	= kiStride2 + kiStride;
   const uint8_t kuiMean	= (pPred[-1] + pPred[-1 + kiStride] + pPred[-1 + kiStride2] + pPred[-1 + kiStride3] +
@@ -87,7 +87,7 @@
   ST32 (pPred + kiStride3, kuiMean32);
 }
 
-void_t WelsI4x4LumaPredDcLeft_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI4x4LumaPredDcLeft_c (uint8_t* pPred, const int32_t kiStride) {
   const int32_t kiStride2	= kiStride << 1;
   const int32_t kiStride3	= kiStride2 + kiStride;
   const uint8_t kuiMean	= (pPred[-1] + pPred[-1 + kiStride] + pPred[-1 + kiStride2] + pPred[-1 + kiStride3] + 2) >> 2;
@@ -99,7 +99,7 @@
   ST32 (pPred + kiStride3, kuiMean32);
 }
 
-void_t WelsI4x4LumaPredDcTop_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI4x4LumaPredDcTop_c (uint8_t* pPred, const int32_t kiStride) {
   const int32_t kiStride2	= kiStride << 1;
   const int32_t kiStride3	= kiStride2 + kiStride;
   const uint8_t kuiMean	= (pPred[-kiStride] + pPred[-kiStride + 1] + pPred[-kiStride + 2] + pPred[-kiStride + 3] + 2) >>
@@ -112,7 +112,7 @@
   ST32 (pPred + kiStride3, kuiMean32);
 }
 
-void_t WelsI4x4LumaPredDcNA_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI4x4LumaPredDcNA_c (uint8_t* pPred, const int32_t kiStride) {
   const uint32_t kuiDC32		= 0x80808080U;
 
   ST32 (pPred                       , kuiDC32);
@@ -122,7 +122,7 @@
 }
 
 /*down pLeft*/
-void_t WelsI4x4LumaPredDDL_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI4x4LumaPredDDL_c (uint8_t* pPred, const int32_t kiStride) {
   const int32_t kiStride2	= kiStride << 1;
   const int32_t kiStride3	= kiStride + kiStride2;
   /*get pTop*/
@@ -151,7 +151,7 @@
 }
 
 /*down pLeft*/
-void_t WelsI4x4LumaPredDDLTop_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI4x4LumaPredDDLTop_c (uint8_t* pPred, const int32_t kiStride) {
   const int32_t kiStride2	= kiStride << 1;
   const int32_t kiStride3	= kiStride + kiStride2;
   /*get pTop*/
@@ -178,7 +178,7 @@
 
 
 /*down right*/
-void_t WelsI4x4LumaPredDDR_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI4x4LumaPredDDR_c (uint8_t* pPred, const int32_t kiStride) {
   const int32_t kiStride2	= kiStride << 1;
   const int32_t kiStride3	= kiStride + kiStride2;
   uint8_t* ptopleft		= &pPred[- (kiStride + 1)];
@@ -218,7 +218,7 @@
 
 
 /*vertical pLeft*/
-void_t WelsI4x4LumaPredVL_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI4x4LumaPredVL_c (uint8_t* pPred, const int32_t kiStride) {
   const int32_t kiStride2	= kiStride << 1;
   const int32_t kiStride3	= kiStride + kiStride2;
   uint8_t* ptopleft		= &pPred[- (kiStride + 1)];
@@ -255,7 +255,7 @@
 }
 
 /*vertical pLeft*/
-void_t WelsI4x4LumaPredVLTop_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI4x4LumaPredVLTop_c (uint8_t* pPred, const int32_t kiStride) {
   const int32_t kiStride2	    = kiStride << 1;
   const int32_t kiStride3	    = kiStride + kiStride2;
   uint8_t* ptopleft		    = &pPred[- (kiStride + 1)];
@@ -286,7 +286,7 @@
 
 
 /*vertical right*/
-void_t WelsI4x4LumaPredVR_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI4x4LumaPredVR_c (uint8_t* pPred, const int32_t kiStride) {
   const int32_t kiStride2	    = kiStride << 1;
   const int32_t kiStride3	    = kiStride + kiStride2;
   const uint8_t kuiLT		    = pPred[-kiStride - 1];
@@ -317,7 +317,7 @@
 }
 
 /*horizontal up*/
-void_t WelsI4x4LumaPredHU_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI4x4LumaPredHU_c (uint8_t* pPred, const int32_t kiStride) {
   const int32_t kiStride2	    = kiStride << 1;
   const int32_t kiStride3	    = kiStride + kiStride2;
   /*get pLeft*/
@@ -343,7 +343,7 @@
 }
 
 /*horizontal down*/
-void_t WelsI4x4LumaPredHD_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI4x4LumaPredHD_c (uint8_t* pPred, const int32_t kiStride) {
   const int32_t kiStride2 	= kiStride << 1;
   const int32_t kiStride3	    = kiStride + kiStride2;
   const uint8_t kuiLT		    = pPred[- (kiStride + 1)];
@@ -380,7 +380,7 @@
   ST32 (pPred + kiStride3, LD32 (kuiList));
 }
 
-void_t WelsIChromaPredV_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsIChromaPredV_c (uint8_t* pPred, const int32_t kiStride) {
   const uint64_t kuiVal64	= LD64 (&pPred[-kiStride]);
   const int32_t kiStride2	= kiStride  << 1;
   const int32_t kiStride4 = kiStride2 << 1;
@@ -395,7 +395,7 @@
   ST64 (pPred + (kiStride << 3) - kiStride , kuiVal64);
 }
 
-void_t WelsIChromaPredH_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsIChromaPredH_c (uint8_t* pPred, const int32_t kiStride) {
   int32_t iTmp = (kiStride << 3) - kiStride;
   uint8_t i = 7;
 
@@ -410,7 +410,7 @@
 }
 
 
-void_t WelsIChromaPredPlane_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsIChromaPredPlane_c (uint8_t* pPred, const int32_t kiStride) {
   int32_t a = 0, b = 0, c = 0, H = 0, V = 0;
   int32_t i, j;
   uint8_t* pTop = &pPred[-kiStride];
@@ -436,7 +436,7 @@
 }
 
 
-void_t WelsIChromaPredDc_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsIChromaPredDc_c (uint8_t* pPred, const int32_t kiStride) {
   const int32_t kiL1		= kiStride - 1;
   const int32_t kiL2		= kiL1 + kiStride;
   const int32_t kiL3		= kiL2 + kiStride;
@@ -467,7 +467,7 @@
   ST64 (pPred + kiL7 + 1, kuiDN64);
 }
 
-void_t WelsIChromaPredDcLeft_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsIChromaPredDcLeft_c (uint8_t* pPred, const int32_t kiStride) {
   const int32_t kiL1	=   -1 + kiStride;
   const int32_t kiL2	= kiL1 + kiStride;
   const int32_t kiL3	= kiL2 + kiStride;
@@ -491,7 +491,7 @@
   ST64 (pPred + kiL7 + 1, kuiDN64);
 }
 
-void_t WelsIChromaPredDcTop_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsIChromaPredDcTop_c (uint8_t* pPred, const int32_t kiStride) {
   int32_t iTmp			= (kiStride << 3) - kiStride;
   /*caculate the kMean value*/
   const uint8_t kuiM1	    = (pPred[-kiStride] + pPred[1 - kiStride] + pPred[2 - kiStride] + pPred[3 - kiStride] + 2) >> 2;
@@ -508,7 +508,7 @@
   } while (i-- > 0);
 }
 
-void_t WelsIChromaPredDcNA_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsIChromaPredDcNA_c (uint8_t* pPred, const int32_t kiStride) {
   int32_t iTmp = (kiStride << 3) - kiStride;
   const uint64_t kuiDC64 = 0x8080808080808080ULL;
   uint8_t i = 7;
@@ -520,7 +520,7 @@
   } while (i-- > 0);
 }
 
-void_t WelsI16x16LumaPredV_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI16x16LumaPredV_c (uint8_t* pPred, const int32_t kiStride) {
   int32_t iTmp			= (kiStride << 4) - kiStride;
   const uint64_t kuiTop1	= LD64 (pPred - kiStride);
   const uint64_t kuiTop2  = LD64 (pPred - kiStride + 8);
@@ -534,7 +534,7 @@
   } while (i-- > 0);
 }
 
-void_t WelsI16x16LumaPredH_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI16x16LumaPredH_c (uint8_t* pPred, const int32_t kiStride) {
   int32_t iTmp = (kiStride << 4) - kiStride;
   uint8_t i = 15;
 
@@ -549,7 +549,7 @@
   } while (i-- > 0);
 }
 
-void_t WelsI16x16LumaPredPlane_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI16x16LumaPredPlane_c (uint8_t* pPred, const int32_t kiStride) {
   int32_t a = 0, b = 0, c = 0, H = 0, V = 0;
   int32_t i, j;
   uint8_t* pTop = &pPred[-kiStride];
@@ -574,7 +574,7 @@
   }
 }
 
-void_t WelsI16x16LumaPredDc_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI16x16LumaPredDc_c (uint8_t* pPred, const int32_t kiStride) {
   int32_t iTmp = (kiStride << 4) - kiStride;
   int32_t iSum = 0;
   uint8_t i = 15;
@@ -596,7 +596,7 @@
 }
 
 
-void_t WelsI16x16LumaPredDcTop_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI16x16LumaPredDcTop_c (uint8_t* pPred, const int32_t kiStride) {
   int32_t iTmp = (kiStride << 4) - kiStride;
   int32_t iSum = 0;
   uint8_t i = 15;
@@ -615,7 +615,7 @@
   } while (i-- > 0);
 }
 
-void_t WelsI16x16LumaPredDcLeft_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI16x16LumaPredDcLeft_c (uint8_t* pPred, const int32_t kiStride) {
   int32_t iTmp = (kiStride << 4) - kiStride;
   int32_t iSum = 0;
   uint64_t uiMean64 = 0;
@@ -640,7 +640,7 @@
   } while (i-- > 0);
 }
 
-void_t WelsI16x16LumaPredDcNA_c (uint8_t* pPred, const int32_t kiStride) {
+void WelsI16x16LumaPredDcNA_c (uint8_t* pPred, const int32_t kiStride) {
   const uint64_t kuiDC64 = 0x8080808080808080ULL;
   int32_t iTmp = (kiStride << 4) - kiStride;
   uint8_t i = 15;
@@ -653,4 +653,4 @@
   } while (i-- > 0);
 }
 
-} // namespace WelsDec
\ No newline at end of file
+} // namespace WelsDec
--- a/codec/decoder/core/src/manage_dec_ref.cpp
+++ b/codec/decoder/core/src/manage_dec_ref.cpp
@@ -44,7 +44,7 @@
 
 namespace WelsDec {
 
-static void_t SetUnRef (PPicture pRef) {
+static void SetUnRef (PPicture pRef) {
   if (NULL != pRef) {
     pRef->bUsedAsRef = false;
     pRef->bIsLongRef = false;
@@ -63,7 +63,7 @@
 // 1.sps arrived that is new sequence starting
 // 2.IDR NAL i.e. 1st layer in IDR AU
 
-void_t WelsResetRefPic (PWelsDecoderContext pCtx) {
+void WelsResetRefPic (PWelsDecoderContext pCtx) {
   int32_t i = 0;
   PRefPic pRefPic = &pCtx->sRefPic;
   pCtx->sRefPic.uiLongRefCount[0] = pCtx->sRefPic.uiShortRefCount[0] = 0;
@@ -92,7 +92,7 @@
  */
 int32_t WelsInitRefList (PWelsDecoderContext pCtx, int32_t iPoc) {
   int32_t i, j, iCount = 0;
-  const bool_t kbUseRefBasePicFlag = pCtx->pCurDqLayer->bUseRefBasePicFlag;
+  const bool kbUseRefBasePicFlag = pCtx->pCurDqLayer->bUseRefBasePicFlag;
   PPicture* ppShoreRefList = pCtx->sRefPic.pShortRefList[LIST_0];
   PPicture* ppLongRefList  = pCtx->sRefPic.pLongRefList[LIST_0];
   memset (pCtx->sRefPic.pRefList[LIST_0], 0, MAX_REF_PIC_COUNT * sizeof (PPicture));
@@ -215,12 +215,12 @@
   return ERR_NONE;
 }
 
-int32_t WelsMarkAsRef (PWelsDecoderContext pCtx, const bool_t kbRefBaseMarkingFlag) {
+int32_t WelsMarkAsRef (PWelsDecoderContext pCtx, const bool kbRefBaseMarkingFlag) {
   PRefPic pRefPic = &pCtx->sRefPic;
   PRefPicMarking pRefPicMarking = pCtx->pCurDqLayer->pRefPicMarking;
   PRefBasePicMarking pRefPicBaseMarking = pCtx->pCurDqLayer->pRefPicBaseMarking;
   PAccessUnit pCurAU = pCtx->pAccessUnitList;
-  bool_t bIsIDRAU = FALSE;
+  bool bIsIDRAU = false;
   uint32_t j;
 
   int32_t iRet = ERR_NONE;
@@ -228,7 +228,7 @@
     return ERR_INFO_INVALID_MMCO_REF_NUM_NOT_ENOUGH;
   }
 
-  pCtx->pDec->bUsedAsRef = TRUE;
+  pCtx->pDec->bUsedAsRef = true;
   pCtx->pDec->uiQualityId = pCtx->pCurDqLayer->sLayerInfo.sNalHeaderExt.uiQualityId;
   pCtx->pDec->uiTemporalId = pCtx->pCurDqLayer->sLayerInfo.sNalHeaderExt.uiTemporalId;
   pCtx->pDec->bRefBaseFlag = kbRefBaseMarkingFlag;
@@ -236,7 +236,7 @@
   for (j = pCurAU->uiStartPos; j <= pCurAU->uiEndPos; j++) {
     if (pCurAU->pNalUnitsList[j]->sNalHeaderExt.sNalUnitHeader.eNalUnitType == NAL_UNIT_CODED_SLICE_IDR
         ||	pCurAU->pNalUnitsList[j]->sNalHeaderExt.bIdrFlag) {
-      bIsIDRAU = TRUE;
+      bIsIDRAU = true;
       break;
     }
   }
@@ -290,7 +290,7 @@
     if (uiMmcoType > MMCO_LONG2UNUSED)	{
       return ERR_INFO_INVALID_MMCO_OPCODE_BASE;
     }
-    iRet = MMCOProcess (pCtx, uiMmcoType, TRUE, iShortFrameNum, uiLongTermPicNum, 0, 0);
+    iRet = MMCOProcess (pCtx, uiMmcoType, true, iShortFrameNum, uiLongTermPicNum, 0, 0);
 
     if (iRet != ERR_NONE) {
       return iRet;
@@ -314,7 +314,7 @@
     if (uiMmcoType > MMCO_LONG)	{
       return ERR_INFO_INVALID_MMCO_OPCODE_BASE;
     }
-    iRet = MMCOProcess (pCtx, uiMmcoType, FALSE, iShortFrameNum, uiLongTermPicNum, iLongTermFrameIdx, iMaxLongTermFrameIdx);
+    iRet = MMCOProcess (pCtx, uiMmcoType, false, iShortFrameNum, uiLongTermPicNum, iLongTermFrameIdx, iMaxLongTermFrameIdx);
     if (iRet != ERR_NONE) {
       return iRet;
     }
@@ -322,7 +322,7 @@
 
   return ERR_NONE;
 }
-static int32_t MMCOProcess (PWelsDecoderContext pCtx, uint32_t uiMmcoType, bool_t bRefBasePic,
+static int32_t MMCOProcess (PWelsDecoderContext pCtx, uint32_t uiMmcoType, bool bRefBasePic,
                             int32_t iShortFrameNum, uint32_t uiLongTermPicNum , int32_t iLongTermFrameIdx, int32_t iMaxLongTermFrameIdx) {
   PRefPic pRefPic = &pCtx->sRefPic;
   PPicture pPic = NULL;
@@ -450,8 +450,8 @@
       if (((eRemoveFlag == REMOVE_TARGET) && ! (pPic->bRefBaseFlag)) || ((eRemoveFlag == REMOVE_BASE)
           && pPic->bRefBaseFlag)) {
         int32_t iMoveSize = pRefPic->uiLongRefCount[LIST_0] - i - 1;
-        pPic->bUsedAsRef = FALSE;
-        pPic->bIsLongRef = FALSE;
+        pPic->bUsedAsRef = false;
+        pPic->bIsLongRef = false;
         if (iMoveSize > 0) {
           memmove (&pRefPic->pLongRefList[LIST_0][i], &pRefPic->pLongRefList[LIST_0][i + 1],
                    iMoveSize * sizeof (PPicture)); //confirmed_safe_unsafe_usage
@@ -474,8 +474,8 @@
 }
 
 static int32_t AddShortTermToList (PRefPic pRefPic, PPicture pPic) {
-  pPic->bUsedAsRef = TRUE;
-  pPic->bIsLongRef = FALSE;
+  pPic->bUsedAsRef = true;
+  pPic->bIsLongRef = false;
   pPic->iLongTermFrameIdx = -1;
   if (pRefPic->uiShortRefCount[LIST_0] > 0)	{
     memmove (&pRefPic->pShortRefList[LIST_0][1], &pRefPic->pShortRefList[LIST_0][0],
@@ -489,8 +489,8 @@
 static int32_t AddLongTermToList (PRefPic pRefPic, PPicture pPic, int32_t iLongTermFrameIdx) {
   int32_t i = 0;
 
-  pPic->bUsedAsRef = TRUE;
-  pPic->bIsLongRef = TRUE;
+  pPic->bUsedAsRef = true;
+  pPic->bIsLongRef = true;
   pPic->iLongTermFrameIdx = iLongTermFrameIdx;
   if (pRefPic->uiLongRefCount[LIST_0] == 0) {
     pRefPic->pLongRefList[LIST_0][pRefPic->uiLongRefCount[LIST_0]] = pPic;
@@ -551,4 +551,4 @@
   return iRet;
 }
 
-} // namespace WelsDec
\ No newline at end of file
+} // namespace WelsDec
--- a/codec/decoder/core/src/mc.cpp
+++ b/codec/decoder/core/src/mc.cpp
@@ -84,13 +84,13 @@
   }
 };
 
-typedef void_t (*PWelsMcWidthHeightFunc) (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+typedef void (*PWelsMcWidthHeightFunc) (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
     int32_t iWidth, int32_t iHeight);
 
 //***************************************************************************//
 //                          C code implementation                            //
 //***************************************************************************//
-static inline void_t McCopyWidthEq2_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McCopyWidthEq2_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                        int32_t iHeight) {
   int32_t i;
   for (i = 0; i < iHeight; i++) { // iWidth == 2 only for chroma
@@ -100,7 +100,7 @@
   }
 }
 
-static inline void_t McCopyWidthEq4_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McCopyWidthEq4_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                        int32_t iHeight) {
   int32_t i;
   for (i = 0; i < iHeight; i++) {
@@ -110,7 +110,7 @@
   }
 }
 
-static inline void_t McCopyWidthEq8_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McCopyWidthEq8_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                        int32_t iHeight) {
   int32_t i;
   for (i = 0; i < iHeight; i++) {
@@ -120,7 +120,7 @@
   }
 }
 
-static inline void_t McCopyWidthEq16_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McCopyWidthEq16_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                         int32_t iHeight) {
   int32_t i;
   for (i = 0; i < iHeight; i++) {
@@ -152,7 +152,7 @@
   return (kuiPix05 - ((kuiPix14 << 2) + kuiPix14) + (kuiPix23 << 4) + (kuiPix23 << 2));
 }
 
-static inline void_t PixelAvg_c (uint8_t* pDst, int32_t iDstStride, uint8_t* pSrcA, int32_t iSrcAStride,
+static inline void PixelAvg_c (uint8_t* pDst, int32_t iDstStride, uint8_t* pSrcA, int32_t iSrcAStride,
                                  uint8_t* pSrcB, int32_t iSrcBStride, int32_t iWidth, int32_t iHeight) {
   int32_t i, j;
   for (i = 0; i < iHeight; i++) {
@@ -164,7 +164,7 @@
     pSrcB += iSrcBStride;
   }
 }
-static inline void_t McCopy_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
+static inline void McCopy_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
                                int32_t iHeight) {
   if (iWidth == 16)
     McCopyWidthEq16_c (pSrc, iSrcStride, pDst, iDstStride, iHeight);
@@ -176,7 +176,7 @@
     McCopyWidthEq2_c (pSrc, iSrcStride, pDst, iDstStride, iHeight);
 }
 
-static inline void_t McHorVer20_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
+static inline void McHorVer20_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
                                    int32_t iHeight) {
   int32_t i, j;
   for (i = 0; i < iHeight; i++) {
@@ -188,7 +188,7 @@
   }
 }
 
-static inline void_t McHorVer02_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
+static inline void McHorVer02_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
                                    int32_t iHeight) {
   int32_t i, j;
   for (i = 0; i < iHeight; i++) {
@@ -200,7 +200,7 @@
   }
 }
 
-static inline void_t McHorVer22_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
+static inline void McHorVer22_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
                                    int32_t iHeight) {
   int16_t iTmp[16 + 5] = {0}; //16
   int32_t i, j, k;
@@ -218,25 +218,25 @@
 }
 
 /////////////////////luma MC//////////////////////////
-static inline void_t McHorVer01_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
+static inline void McHorVer01_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
                                    int32_t iHeight) {
   uint8_t uiTmp[256] = { 0 };
   McHorVer02_c (pSrc, iSrcStride, uiTmp, 16, iWidth, iHeight);
   PixelAvg_c (pDst, iDstStride, pSrc, iSrcStride, uiTmp, 16, iWidth, iHeight);
 }
-static inline void_t McHorVer03_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
+static inline void McHorVer03_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
                                    int32_t iHeight) {
   uint8_t uiTmp[256] = { 0 };
   McHorVer02_c (pSrc, iSrcStride, uiTmp, 16, iWidth, iHeight);
   PixelAvg_c (pDst, iDstStride, pSrc + iSrcStride, iSrcStride, uiTmp, 16, iWidth, iHeight);
 }
-static inline void_t McHorVer10_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
+static inline void McHorVer10_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
                                    int32_t iHeight) {
   uint8_t uiTmp[256] = { 0 };
   McHorVer20_c (pSrc, iSrcStride, uiTmp, 16, iWidth, iHeight);
   PixelAvg_c (pDst, iDstStride, pSrc, iSrcStride, uiTmp, 16, iWidth, iHeight);
 }
-static inline void_t McHorVer11_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
+static inline void McHorVer11_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
                                    int32_t iHeight) {
   uint8_t uiHorTmp[256] = { 0 };
   uint8_t uiVerTmp[256] = { 0 };
@@ -244,7 +244,7 @@
   McHorVer02_c (pSrc, iSrcStride, uiVerTmp, 16, iWidth, iHeight);
   PixelAvg_c (pDst, iDstStride, uiHorTmp, 16, uiVerTmp, 16, iWidth, iHeight);
 }
-static inline void_t McHorVer12_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
+static inline void McHorVer12_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
                                    int32_t iHeight) {
   uint8_t uiVerTmp[256] = { 0 };
   uint8_t uiCtrTmp[256] = { 0 };
@@ -252,7 +252,7 @@
   McHorVer22_c (pSrc, iSrcStride, uiCtrTmp, 16, iWidth, iHeight);
   PixelAvg_c (pDst, iDstStride, uiVerTmp, 16, uiCtrTmp, 16, iWidth, iHeight);
 }
-static inline void_t McHorVer13_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
+static inline void McHorVer13_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
                                    int32_t iHeight) {
   uint8_t uiHorTmp[256] = { 0 };
   uint8_t uiVerTmp[256] = { 0 };
@@ -260,7 +260,7 @@
   McHorVer02_c (pSrc, iSrcStride, uiVerTmp, 16, iWidth, iHeight);
   PixelAvg_c (pDst, iDstStride, uiHorTmp, 16, uiVerTmp, 16, iWidth, iHeight);
 }
-static inline void_t McHorVer21_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
+static inline void McHorVer21_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
                                    int32_t iHeight) {
   uint8_t uiHorTmp[256] = { 0 };
   uint8_t uiCtrTmp[256] = { 0 };
@@ -268,7 +268,7 @@
   McHorVer22_c (pSrc, iSrcStride, uiCtrTmp, 16, iWidth, iHeight);
   PixelAvg_c (pDst, iDstStride, uiHorTmp, 16, uiCtrTmp, 16, iWidth, iHeight);
 }
-static inline void_t McHorVer23_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
+static inline void McHorVer23_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
                                    int32_t iHeight) {
   uint8_t uiHorTmp[256] = { 0 };
   uint8_t uiCtrTmp[256] = { 0 };
@@ -276,13 +276,13 @@
   McHorVer22_c (pSrc, iSrcStride, uiCtrTmp, 16, iWidth, iHeight);
   PixelAvg_c (pDst, iDstStride, uiHorTmp, 16, uiCtrTmp, 16, iWidth, iHeight);
 }
-static inline void_t McHorVer30_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
+static inline void McHorVer30_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
                                    int32_t iHeight) {
   uint8_t uiHorTmp[256] = { 0 };
   McHorVer20_c (pSrc, iSrcStride, uiHorTmp, 16, iWidth, iHeight);
   PixelAvg_c (pDst, iDstStride, pSrc + 1, iSrcStride, uiHorTmp, 16, iWidth, iHeight);
 }
-static inline void_t McHorVer31_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
+static inline void McHorVer31_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
                                    int32_t iHeight) {
   uint8_t uiHorTmp[256] = { 0 };
   uint8_t uiVerTmp[256] = { 0 };
@@ -290,7 +290,7 @@
   McHorVer02_c (pSrc + 1, iSrcStride, uiVerTmp, 16, iWidth, iHeight);
   PixelAvg_c (pDst, iDstStride, uiHorTmp, 16, uiVerTmp, 16, iWidth, iHeight);
 }
-static inline void_t McHorVer32_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
+static inline void McHorVer32_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
                                    int32_t iHeight) {
   uint8_t uiVerTmp[256] = { 0 };
   uint8_t uiCtrTmp[256] = { 0 };
@@ -298,7 +298,7 @@
   McHorVer22_c (pSrc, iSrcStride, uiCtrTmp, 16, iWidth, iHeight);
   PixelAvg_c (pDst, iDstStride, uiVerTmp, 16, uiCtrTmp, 16, iWidth, iHeight);
 }
-static inline void_t McHorVer33_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
+static inline void McHorVer33_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
                                    int32_t iHeight) {
   uint8_t uiHorTmp[256] = { 0 };
   uint8_t uiVerTmp[256] = { 0 };
@@ -307,7 +307,7 @@
   PixelAvg_c (pDst, iDstStride, uiHorTmp, 16, uiVerTmp, 16, iWidth, iHeight);
 }
 
-void_t McLuma_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+void McLuma_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                  int16_t iMvX, int16_t iMvY, int32_t iWidth, int32_t iHeight)
 //pSrc has been added the offset of mv
 {
@@ -321,7 +321,7 @@
   pWelsMcFunc[iMvX & 0x03][iMvY & 0x03] (pSrc, iSrcStride, pDst, iDstStride, iWidth, iHeight);
 }
 
-static inline void_t McChromaWithFragMv_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McChromaWithFragMv_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
     int16_t iMvX, int16_t iMvY, int32_t iWidth, int32_t iHeight) {
   int32_t i, j;
   int32_t iA, iB, iC, iD;
@@ -341,7 +341,7 @@
   }
 }
 
-void_t McChroma_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+void McChroma_c (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                    int16_t iMvX, int16_t iMvY, int32_t iWidth, int32_t iHeight)
 //pSrc has been added the offset of mv
 {
@@ -357,7 +357,7 @@
 //***************************************************************************//
 //                       SSE2 implement                          //
 //***************************************************************************//
-static inline void_t McHorVer22WidthEq8_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McHorVer22WidthEq8_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
     int32_t iHeight) {
   ENFORCE_STACK_ALIGN_2D (int16_t, iTap, 21, 8, 16)
   McHorVer22Width8HorFirst_sse2 (pSrc - 2, iSrcStride, (uint8_t*)iTap, 16, iHeight + 5);
@@ -364,19 +364,19 @@
   McHorVer22Width8VerLastAlign_sse2 ((uint8_t*)iTap, 16, pDst, iDstStride, 8, iHeight);
 }
 
-static inline void_t McHorVer02WidthEq16_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McHorVer02WidthEq16_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
     int32_t iHeight) {
   McHorVer02WidthEq8_sse2 (pSrc,     iSrcStride, pDst,     iDstStride, iHeight);
   McHorVer02WidthEq8_sse2 (&pSrc[8], iSrcStride, &pDst[8], iDstStride, iHeight);
 }
 
-static inline void_t McHorVer22WidthEq16_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McHorVer22WidthEq16_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
     int32_t iHeight) {
   McHorVer22WidthEq8_sse2 (pSrc,     iSrcStride, pDst,     iDstStride, iHeight);
   McHorVer22WidthEq8_sse2 (&pSrc[8], iSrcStride, &pDst[8], iDstStride, iHeight);
 }
 
-static inline void_t McCopy_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
+static inline void McCopy_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride, int32_t iWidth,
                                   int32_t iHeight) {
   if (iWidth == 16)
     McCopyWidthEq16_sse2 (pSrc, iSrcStride, pDst, iDstStride, iHeight);
@@ -388,7 +388,7 @@
     McCopyWidthEq2_c (pSrc, iSrcStride, pDst, iDstStride, iHeight);
 }
 
-static inline void_t McHorVer20_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McHorVer20_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                       int32_t iWidth, int32_t iHeight) {
   if (iWidth == 16)
     McHorVer20WidthEq16_sse2 (pSrc, iSrcStride, pDst, iDstStride, iHeight);
@@ -398,7 +398,7 @@
     McHorVer20WidthEq4_mmx (pSrc, iSrcStride, pDst, iDstStride, iHeight);
 }
 
-static inline void_t McHorVer02_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McHorVer02_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                       int32_t iWidth, int32_t iHeight) {
   if (iWidth == 16)
     McHorVer02WidthEq16_sse2 (pSrc, iSrcStride, pDst, iDstStride, iHeight);
@@ -408,7 +408,7 @@
     McHorVer02_c (pSrc, iSrcStride, pDst, iDstStride, 4, iHeight);
 }
 
-static inline void_t McHorVer22_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McHorVer22_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                       int32_t iWidth, int32_t iHeight) {
   if (iWidth == 16)
     McHorVer22WidthEq16_sse2 (pSrc, iSrcStride, pDst, iDstStride, iHeight);
@@ -418,7 +418,7 @@
     McHorVer22_c (pSrc, iSrcStride, pDst, iDstStride, 4, iHeight);
 }
 
-static inline void_t McHorVer01_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McHorVer01_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                       int32_t iWidth, int32_t iHeight) {
   ENFORCE_STACK_ALIGN_1D (uint8_t, pTmp, 256, 16);
   if (iWidth == 16) {
@@ -432,7 +432,7 @@
     PixelAvgWidthEq4_mmx (pDst, iDstStride, pSrc, iSrcStride, pTmp, 16, iHeight);
   }
 }
-static inline void_t McHorVer03_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McHorVer03_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                       int32_t iWidth, int32_t iHeight) {
   ENFORCE_STACK_ALIGN_1D (uint8_t, pTmp, 256, 16);
   if (iWidth == 16) {
@@ -446,7 +446,7 @@
     PixelAvgWidthEq4_mmx (pDst, iDstStride, pSrc + iSrcStride, iSrcStride, pTmp, 16, iHeight);
   }
 }
-static inline void_t McHorVer10_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McHorVer10_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                       int32_t iWidth, int32_t iHeight) {
   ENFORCE_STACK_ALIGN_1D (uint8_t, pTmp, 256, 16);
   if (iWidth == 16) {
@@ -460,7 +460,7 @@
     PixelAvgWidthEq4_mmx (pDst, iDstStride, pSrc, iSrcStride, pTmp, 16, iHeight);
   }
 }
-static inline void_t McHorVer11_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McHorVer11_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                       int32_t iWidth, int32_t iHeight) {
   ENFORCE_STACK_ALIGN_1D (uint8_t, pHorTmp, 256, 16);
   ENFORCE_STACK_ALIGN_1D (uint8_t, pVerTmp, 256, 16);
@@ -478,7 +478,7 @@
     PixelAvgWidthEq4_mmx (pDst, iDstStride, pHorTmp, 16, pVerTmp, 16, iHeight);
   }
 }
-static inline void_t McHorVer12_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McHorVer12_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                       int32_t iWidth, int32_t iHeight) {
   ENFORCE_STACK_ALIGN_1D (uint8_t, pVerTmp, 256, 16);
   ENFORCE_STACK_ALIGN_1D (uint8_t, pCtrTmp, 256, 16);
@@ -496,7 +496,7 @@
     PixelAvgWidthEq4_mmx (pDst, iDstStride, pVerTmp, 16, pCtrTmp, 16, iHeight);
   }
 }
-static inline void_t McHorVer13_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McHorVer13_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                       int32_t iWidth, int32_t iHeight) {
   ENFORCE_STACK_ALIGN_1D (uint8_t, pHorTmp, 256, 16);
   ENFORCE_STACK_ALIGN_1D (uint8_t, pVerTmp, 256, 16);
@@ -514,7 +514,7 @@
     PixelAvgWidthEq4_mmx (pDst, iDstStride, pHorTmp, 16, pVerTmp, 16, iHeight);
   }
 }
-static inline void_t McHorVer21_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McHorVer21_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                       int32_t iWidth, int32_t iHeight) {
   ENFORCE_STACK_ALIGN_1D (uint8_t, pHorTmp, 256, 16);
   ENFORCE_STACK_ALIGN_1D (uint8_t, pCtrTmp, 256, 16);
@@ -532,7 +532,7 @@
     PixelAvgWidthEq4_mmx (pDst, iDstStride, pHorTmp, 16, pCtrTmp, 16, iHeight);
   }
 }
-static inline void_t McHorVer23_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McHorVer23_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                       int32_t iWidth, int32_t iHeight) {
   ENFORCE_STACK_ALIGN_1D (uint8_t, pHorTmp, 256, 16);
   ENFORCE_STACK_ALIGN_1D (uint8_t, pCtrTmp, 256, 16);
@@ -550,7 +550,7 @@
     PixelAvgWidthEq4_mmx (pDst, iDstStride, pHorTmp, 16, pCtrTmp, 16, iHeight);
   }
 }
-static inline void_t McHorVer30_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McHorVer30_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                       int32_t iWidth, int32_t iHeight) {
   ENFORCE_STACK_ALIGN_1D (uint8_t, pHorTmp, 256, 16);
   if (iWidth == 16) {
@@ -564,7 +564,7 @@
     PixelAvgWidthEq4_mmx (pDst, iDstStride, pSrc + 1, iSrcStride, pHorTmp, 16, iHeight);
   }
 }
-static inline void_t McHorVer31_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McHorVer31_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                       int32_t iWidth, int32_t iHeight) {
   ENFORCE_STACK_ALIGN_1D (uint8_t, pHorTmp, 256, 16);
   ENFORCE_STACK_ALIGN_1D (uint8_t, pVerTmp, 256, 16);
@@ -582,7 +582,7 @@
     PixelAvgWidthEq4_mmx (pDst, iDstStride, pHorTmp, 16, pVerTmp, 16, iHeight);
   }
 }
-static inline void_t McHorVer32_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McHorVer32_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                       int32_t iWidth, int32_t iHeight) {
   ENFORCE_STACK_ALIGN_1D (uint8_t, pVerTmp, 256, 16);
   ENFORCE_STACK_ALIGN_1D (uint8_t, pCtrTmp, 256, 16);
@@ -600,7 +600,7 @@
     PixelAvgWidthEq4_mmx (pDst, iDstStride, pVerTmp, 16, pCtrTmp, 16, iHeight);
   }
 }
-static inline void_t McHorVer33_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+static inline void McHorVer33_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                                       int32_t iWidth, int32_t iHeight) {
   ENFORCE_STACK_ALIGN_1D (uint8_t, pHorTmp, 256, 16);
   ENFORCE_STACK_ALIGN_1D (uint8_t, pVerTmp, 256, 16);
@@ -619,7 +619,7 @@
   }
 }
 
-void_t McLuma_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+void McLuma_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                     int16_t iMvX, int16_t iMvY, int32_t iWidth, int32_t iHeight)
 //pSrc has been added the offset of mv
 {
@@ -633,7 +633,7 @@
   pWelsMcFunc[iMvX & 0x03][iMvY & 0x03] (pSrc, iSrcStride, pDst, iDstStride, iWidth, iHeight);
 }
 
-void_t McChroma_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
+void McChroma_sse2 (uint8_t* pSrc, int32_t iSrcStride, uint8_t* pDst, int32_t iDstStride,
                       int16_t iMvX, int16_t iMvY, int32_t iWidth, int32_t iHeight) {
   static const PMcChromaWidthExtFunc kpMcChromaWidthFuncs[2] = {
     McChromaWidthEq4_mmx,
@@ -654,7 +654,7 @@
 
 #endif //X86_ASM
 
-void_t InitMcFunc (SMcFunc* pMcFunc, int32_t iCpu) {
+void InitMcFunc (SMcFunc* pMcFunc, int32_t iCpu) {
   pMcFunc->pMcLumaFunc   = McLuma_c;
   pMcFunc->pMcChromaFunc = McChroma_c;
 
--- a/codec/decoder/core/src/mem_align.cpp
+++ b/codec/decoder/core/src/mem_align.cpp
@@ -44,8 +44,8 @@
 #endif
 //
 
-void_t* WelsMalloc (const uint32_t kuiSize, const str_t* kpTag) {
-  const int32_t kiSizeVoidPtr	= sizeof (void_t**);
+void* WelsMalloc (const uint32_t kuiSize, const char* kpTag) {
+  const int32_t kiSizeVoidPtr	= sizeof (void**);
   const int32_t kiSizeInt		= sizeof (int32_t);
   const int32_t kiAlignBytes	= 15;
   uint8_t* pBuf		= (uint8_t*) malloc (kuiSize + kiAlignBytes + kiSizeVoidPtr + kiSizeInt);
@@ -59,7 +59,7 @@
 
   if (kpTag != NULL) {
     if (pMemCheckMalloc != NULL) {
-      fprintf (pMemCheckMalloc, "0x%x, size: %d       , malloc %s\n", (void_t*)pBuf,
+      fprintf (pMemCheckMalloc, "0x%x, size: %d       , malloc %s\n", (void*)pBuf,
                (kuiSize + kiAlignBytes + kiSizeVoidPtr + kiSizeInt), kpTag);
     }
     if (pMemCheckMalloc != NULL) {
@@ -76,7 +76,7 @@
 
   pAlignBuf = pBuf + kiAlignBytes + kiSizeVoidPtr + kiSizeInt;
   pAlignBuf -= (uintptr_t) pAlignBuf & kiAlignBytes;
-  * ((void_t**) (pAlignBuf - kiSizeVoidPtr)) = pBuf;
+  * ((void**) (pAlignBuf - kiSizeVoidPtr)) = pBuf;
   * ((int32_t*) (pAlignBuf - (kiSizeVoidPtr + kiSizeInt))) = kuiSize;
 
   return (pAlignBuf);
@@ -84,15 +84,15 @@
 
 /////////////////////////////////////////////////////////////////////////////
 
-void_t WelsFree (void_t* pPtr, const str_t* kpTag) {
+void WelsFree (void* pPtr, const char* kpTag) {
   if (pPtr) {
 #ifdef MEMORY_CHECK
     if (NULL != pMemCheckFree && kpTag != NULL) {
-      fprintf (pMemCheckFree, "0x%x, free %s\n", (void_t*) (* (((void_t**) pPtr) - 1)), kpTag);
+      fprintf (pMemCheckFree, "0x%x, free %s\n", (void*) (* (((void**) pPtr) - 1)), kpTag);
       fflush (pMemCheckFree);
     }
 #endif
-    free (* (((void_t**) pPtr) - 1));
+    free (* (((void**) pPtr) - 1));
   }
 }
 
--- a/codec/decoder/core/src/memmgr_nal_unit.cpp
+++ b/codec/decoder/core/src/memmgr_nal_unit.cpp
@@ -143,4 +143,4 @@
   return pNu;
 }
 
-} // namespace WelsDec
\ No newline at end of file
+} // namespace WelsDec
--- a/codec/decoder/core/src/mv_pred.cpp
+++ b/codec/decoder/core/src/mv_pred.cpp
@@ -43,8 +43,8 @@
 #include "mb_cache.h"
 
 namespace WelsDec {
-void_t PredPSkipMvFromNeighbor (PDqLayer pCurLayer, int16_t iMvp[2]) {
-  bool_t bTopAvail, bLeftTopAvail, bRightTopAvail, bLeftAvail;
+void PredPSkipMvFromNeighbor (PDqLayer pCurLayer, int16_t iMvp[2]) {
+  bool bTopAvail, bLeftTopAvail, bRightTopAvail, bLeftAvail;
 
   int32_t iCurSliceIdc, iTopSliceIdc, iLeftTopSliceIdc, iRightTopSliceIdc, iLeftSliceIdc;
   int32_t iLeftTopType, iRightTopType, iTopType, iLeftType;
@@ -194,7 +194,7 @@
 
 
 //basic iMVs prediction unit for iMVs partition width (4, 2, 1)
-void_t PredMv (int16_t iMotionVector[LIST_A][30][MV_A], int8_t iRefIndex[LIST_A][30],
+void PredMv (int16_t iMotionVector[LIST_A][30][MV_A], int8_t iRefIndex[LIST_A][30],
                int32_t iPartIdx, int32_t iPartWidth, int8_t iRef, int16_t iMVP[2]) {
   const uint8_t kuiLeftIdx	= g_kuiCache30ScanIdx[iPartIdx] - 1;
   const uint8_t kuiTopIdx		= g_kuiCache30ScanIdx[iPartIdx] - 6;
@@ -241,7 +241,7 @@
     iMVP[1] = WelsMedian (iAMV[1], iBMV[1], iCMV[1]);
   }
 }
-void_t PredInter8x16Mv (int16_t iMotionVector[LIST_A][30][MV_A], int8_t iRefIndex[LIST_A][30],
+void PredInter8x16Mv (int16_t iMotionVector[LIST_A][30][MV_A], int8_t iRefIndex[LIST_A][30],
                         int32_t iPartIdx, int8_t iRef, int16_t iMVP[2]) {
   if (0 == iPartIdx) {
     const int8_t kiLeftRef = iRefIndex[0][6];
@@ -264,7 +264,7 @@
 
   PredMv (iMotionVector, iRefIndex, iPartIdx, 2, iRef, iMVP);
 }
-void_t PredInter16x8Mv (int16_t iMotionVector[LIST_A][30][MV_A], int8_t iRefIndex[LIST_A][30],
+void PredInter16x8Mv (int16_t iMotionVector[LIST_A][30][MV_A], int8_t iRefIndex[LIST_A][30],
                         int32_t iPartIdx, int8_t iRef, int16_t iMVP[2]) {
   if (0 == iPartIdx) {
     const int8_t kiTopRef = iRefIndex[0][1];
@@ -285,7 +285,7 @@
 
 //update iMVs and iRefIndex cache for current MB, only for P_16*16 (SKIP inclusive)
 /* can be further optimized */
-void_t UpdateP16x16MotionInfo (PDqLayer pCurDqLayer, int8_t iRef, int16_t iMVs[2]) {
+void UpdateP16x16MotionInfo (PDqLayer pCurDqLayer, int8_t iRef, int16_t iMVs[2]) {
   const int16_t kiRef2		= (iRef << 8) | iRef;
   const int32_t kiMV32		= LD32 (iMVs);
   int32_t i;
@@ -308,7 +308,7 @@
 
 //update iRefIndex and iMVs of Mb, only for P16x8
 /*need further optimization, mb_cache not work */
-void_t UpdateP16x8MotionInfo (PDqLayer pCurDqLayer, int16_t iMotionVector[LIST_A][30][MV_A],
+void UpdateP16x8MotionInfo (PDqLayer pCurDqLayer, int16_t iMotionVector[LIST_A][30][MV_A],
                               int8_t iRefIndex[LIST_A][30],
                               int32_t iPartIdx, int8_t iRef, int16_t iMVs[2]) {
   const int16_t kiRef2 = (iRef << 8) | iRef;
@@ -338,7 +338,7 @@
   }
 }
 //update iRefIndex and iMVs of both Mb and Mb_cache, only for P8x16
-void_t UpdateP8x16MotionInfo (PDqLayer pCurDqLayer, int16_t iMotionVector[LIST_A][30][MV_A],
+void UpdateP8x16MotionInfo (PDqLayer pCurDqLayer, int16_t iMotionVector[LIST_A][30][MV_A],
                               int8_t iRefIndex[LIST_A][30],
                               int32_t iPartIdx, int8_t iRef, int16_t iMVs[2]) {
   const int16_t kiRef2 = (iRef << 8) | iRef;
@@ -369,4 +369,4 @@
   }
 }
 
-} // namespace WelsDec
\ No newline at end of file
+} // namespace WelsDec
--- a/codec/decoder/core/src/parse_mb_syn_cavlc.cpp
+++ b/codec/decoder/core/src/parse_mb_syn_cavlc.cpp
@@ -45,7 +45,7 @@
 
 namespace WelsDec {
 
-void_t GetNeighborAvailMbType (PNeighAvail pNeighAvail, PDqLayer pCurLayer) {
+void GetNeighborAvailMbType (PNeighAvail pNeighAvail, PDqLayer pCurLayer) {
   int32_t iCurSliceIdc, iTopSliceIdc, iLeftTopSliceIdc, iRightTopSliceIdc, iLeftSliceIdc;
   int32_t iCurXy, iTopXy, iLeftXy, iLeftTopXy, iRightTopXy;
   int32_t iCurX, iCurY;
@@ -92,7 +92,7 @@
   pNeighAvail->iLeftTopType  = (pNeighAvail->iLeftTopAvail  ? pCurLayer->pMbType[iLeftTopXy]  : 0);
   pNeighAvail->iRightTopType = (pNeighAvail->iRightTopAvail ? pCurLayer->pMbType[iRightTopXy] : 0);
 }
-void_t WelsFillCacheNonZeroCount (PNeighAvail pNeighAvail, uint8_t* pNonZeroCount,
+void WelsFillCacheNonZeroCount (PNeighAvail pNeighAvail, uint8_t* pNonZeroCount,
                                   PDqLayer pCurLayer) { //no matter slice type, intra_pred_constrained_flag
   int32_t iCurXy  = pCurLayer->iMbXyIndex;
   int32_t iTopXy  = 0;
@@ -143,7 +143,7 @@
       pNonZeroCount[5 + 8 * 5] = -1;//unavailable
   }
 }
-void_t WelsFillCacheConstrain1Intra4x4 (PNeighAvail pNeighAvail, uint8_t* pNonZeroCount, int8_t* pIntraPredMode,
+void WelsFillCacheConstrain1Intra4x4 (PNeighAvail pNeighAvail, uint8_t* pNonZeroCount, int8_t* pIntraPredMode,
                                         PDqLayer pCurLayer) { //no matter slice type
   int32_t iCurXy  = pCurLayer->iMbXyIndex;
   int32_t iTopXy  = 0;
@@ -189,7 +189,7 @@
   }
 }
 
-void_t WelsFillCacheConstrain0Intra4x4 (PNeighAvail pNeighAvail, uint8_t* pNonZeroCount, int8_t* pIntraPredMode,
+void WelsFillCacheConstrain0Intra4x4 (PNeighAvail pNeighAvail, uint8_t* pNonZeroCount, int8_t* pIntraPredMode,
                                         PDqLayer pCurLayer) { //no matter slice type
   int32_t iCurXy  = pCurLayer->iMbXyIndex;
   int32_t iTopXy  = 0;
@@ -235,7 +235,7 @@
   }
 }
 
-void_t WelsFillCacheInter (PNeighAvail pNeighAvail, uint8_t* pNonZeroCount,
+void WelsFillCacheInter (PNeighAvail pNeighAvail, uint8_t* pNonZeroCount,
                            int16_t iMvArray[LIST_A][30][MV_A], int8_t iRefIdxArray[LIST_A][30], PDqLayer pCurLayer) {
   int32_t iCurXy      = pCurLayer->iMbXyIndex;
   int32_t iTopXy      = 0;
@@ -398,7 +398,7 @@
       *pMode = I16_PRED_DC_128;
     }
   } else {
-    bool_t bModeAvail = CHECK_I16_MODE (*pMode, iLeftAvail, iTopAvail, bLeftTopAvail);
+    bool bModeAvail = CHECK_I16_MODE (*pMode, iLeftAvail, iTopAvail, bLeftTopAvail);
     if (0 == bModeAvail) {
       return ERR_INFO_INVALID_I16x16_PRED_MODE;
     }
@@ -423,7 +423,7 @@
       *pMode = C_PRED_DC_128;
     }
   } else {
-    bool_t bModeAvail = CHECK_CHROMA_MODE (*pMode, iLeftAvail, iTopAvail, bLeftTopAvail);
+    bool bModeAvail = CHECK_CHROMA_MODE (*pMode, iLeftAvail, iTopAvail, bLeftTopAvail);
     if (0 == bModeAvail) {
       return ERR_INFO_INVALID_I_CHROMA_PRED_MODE;
     }
@@ -455,7 +455,7 @@
       iFinalMode = I4_PRED_DC_128;
     }
   } else {
-    bool_t bModeAvail = CHECK_I4_MODE (*pMode, iLeftAvail, iTopAvail, bLeftTopAvail);
+    bool bModeAvail = CHECK_I4_MODE (*pMode, iLeftAvail, iTopAvail, bLeftTopAvail);
     if (0 == bModeAvail) {
       return ERR_INVALID_INTRA4X4_MODE;
     }
@@ -472,10 +472,10 @@
   return iFinalMode;
 }
 
-void_t BsStartCavlc (PBitStringAux pBs) {
+void BsStartCavlc (PBitStringAux pBs) {
   pBs->iIndex = ((pBs->pCurBuf - pBs->pStartBuf) << 3) - (16 - pBs->iLeftBits);
 }
-void_t BsEndCavlc (PBitStringAux pBs) {
+void BsEndCavlc (PBitStringAux pBs) {
   pBs->pCurBuf   = pBs->pStartBuf + (pBs->iIndex >> 3);
   pBs->uiCurBits = ((((pBs->pCurBuf[0] << 8) | pBs->pCurBuf[1]) << 16) | (pBs->pCurBuf[2] << 8) | pBs->pCurBuf[3]) <<
                    (pBs->iIndex & 0x07);
@@ -486,7 +486,7 @@
 
 // return: used bits
 static int32_t CavlcGetTrailingOnesAndTotalCoeff (uint8_t& uiTotalCoeff, uint8_t& uiTrailingOnes,
-    SReadBitsCache* pBitsCache, SVlcTable* pVlcTable, bool_t bChromaDc, int8_t nC) {
+    SReadBitsCache* pBitsCache, SVlcTable* pVlcTable, bool bChromaDc, int8_t nC) {
   const uint8_t* kpVlcTableMoreBitsCountList[3] = {g_kuiVlcTableMoreBitsCount0, g_kuiVlcTableMoreBitsCount1, g_kuiVlcTableMoreBitsCount2};
   int32_t iUsedBits = 0;
   int32_t iIndexVlc, iIndexValue, iNcMapIdx;
@@ -587,7 +587,7 @@
 }
 
 static int32_t CavlcGetTotalZeros (int32_t& iZerosLeft, SReadBitsCache* pBitsCache, uint8_t uiTotalCoeff,
-                                   SVlcTable* pVlcTable, bool_t bChromaDc) {
+                                   SVlcTable* pVlcTable, bool bChromaDc) {
   int32_t iCount, iUsedBits = 0;
   const uint8_t* kpBitNumMap;
   uint32_t uiValue;
@@ -673,7 +673,7 @@
   int32_t iUsedBits = 0;
   int32_t iCurIdx   = pBs->iIndex;
   uint8_t* pBuf     = ((uint8_t*)pBs->pStartBuf) + (iCurIdx >> 3);
-  bool_t  bChromaDc = (CHROMA_DC == iResidualProperty);
+  bool  bChromaDc = (CHROMA_DC == iResidualProperty);
   uint8_t bChroma   = (bChromaDc || CHROMA_AC == iResidualProperty);
   SReadBitsCache sReadBitsCache;
 
--- a/codec/decoder/core/src/pic_queue.cpp
+++ b/codec/decoder/core/src/pic_queue.cpp
@@ -44,7 +44,7 @@
 
 namespace WelsDec {
 
-void_t FreePicture (PPicture pPic);
+void FreePicture (PPicture pPic);
 
 
 ///////////////////////////////////Recycled queue management for pictures///////////////////////////////////
@@ -106,7 +106,7 @@
   return pPic;
 }
 
-void_t FreePicture (PPicture pPic) {
+void FreePicture (PPicture pPic) {
   if (NULL != pPic) {
 
     if (pPic->pBuffer[0]) {
@@ -149,4 +149,4 @@
   return pPic;
 }
 
-} // namespace WelsDec
\ No newline at end of file
+} // namespace WelsDec
--- a/codec/decoder/core/src/rec_mb.cpp
+++ b/codec/decoder/core/src/rec_mb.cpp
@@ -44,7 +44,7 @@
 
 namespace WelsDec {
 
-void_t WelsFillRecNeededMbInfo (PWelsDecoderContext pCtx, bool_t bOutput, PDqLayer pCurLayer) {
+void WelsFillRecNeededMbInfo (PWelsDecoderContext pCtx, bool bOutput, PDqLayer pCurLayer) {
   PPicture pCurPic = pCtx->pDec;
   int32_t iLumaStride   = pCurPic->iLinesize[0];
   int32_t iChromaStride = pCurPic->iLinesize[1];
@@ -183,7 +183,7 @@
   int32_t iPicHeight;
 } sMCRefMember;
 //according to current 8*8 block ref_index to gain reference picture
-static inline void_t GetRefPic (sMCRefMember* pMCRefMem, PWelsDecoderContext pCtx, int8_t* pRefIdxList,
+static inline void GetRefPic (sMCRefMember* pMCRefMem, PWelsDecoderContext pCtx, int8_t* pRefIdxList,
                                 int32_t iIndex) {
   PPicture pRefPic;
 
@@ -202,7 +202,7 @@
 #ifndef MC_FLOW_SIMPLE_JUDGE
 #define MC_FLOW_SIMPLE_JUDGE 1
 #endif //MC_FLOW_SIMPLE_JUDGE
-static inline void_t BaseMC (sMCRefMember* pMCRefMem, int32_t iXOffset, int32_t iYOffset, SMcFunc* pMCFunc,
+static inline void BaseMC (sMCRefMember* pMCRefMem, int32_t iXOffset, int32_t iYOffset, SMcFunc* pMCFunc,
                              int32_t iBlkWidth, int32_t iBlkHeight, int16_t iMVs[2]) {
   int32_t iExpandWidth = PADDING_LENGTH;
   int32_t	iExpandHeight = PADDING_LENGTH;
@@ -235,7 +235,7 @@
   uint8_t* pDstY = pMCRefMem->pDstY;
   uint8_t* pDstU = pMCRefMem->pDstU;
   uint8_t* pDstV = pMCRefMem->pDstV;
-  bool_t bExpand = false;
+  bool bExpand = false;
 
   ENFORCE_STACK_ALIGN_1D (uint8_t, uiExpandBuf, (PADDING_LENGTH + 6) * (PADDING_LENGTH + 6), 16);
 
@@ -289,7 +289,7 @@
   }
 }
 
-void_t GetInterPred (uint8_t* pPredY, uint8_t* pPredCb, uint8_t* pPredCr, PWelsDecoderContext pCtx) {
+void GetInterPred (uint8_t* pPredY, uint8_t* pPredCb, uint8_t* pPredCr, PWelsDecoderContext pCtx) {
   sMCRefMember pMCRefMem;
   PDqLayer pCurDqLayer = pCtx->pCurDqLayer;
   SMcFunc* pMCFunc = &pCtx->sMcFunc;
@@ -464,7 +464,7 @@
   return ERR_NONE;
 }
 
-void_t FillBufForMc (uint8_t* pBuf, int32_t iBufStride, uint8_t* pSrc, int32_t iSrcStride, int32_t iSrcOffset,
+void FillBufForMc (uint8_t* pBuf, int32_t iBufStride, uint8_t* pSrc, int32_t iSrcStride, int32_t iSrcOffset,
                      int32_t iBlockWidth, int32_t iBlockHeight, int32_t iSrcX, int32_t iSrcY, int32_t iPicWidth, int32_t iPicHeight) {
   int32_t iY;
   int32_t iStartY, iStartX, iEndY, iEndX;
--- a/codec/decoder/core/src/utils.cpp
+++ b/codec/decoder/core/src/utils.cpp
@@ -48,7 +48,7 @@
 
 
 
-void_t WelsLog (void_t* pPtr, int32_t iLevel, const char* kpFmt, ...) {
+void WelsLog (void* pPtr, int32_t iLevel, const char* kpFmt, ...) {
   va_list pVl;
 
   PWelsDecoderContext pCtx  = (PWelsDecoderContext)pPtr;
--- a/codec/decoder/plus/inc/welsCodecTrace.h
+++ b/codec/decoder/plus/inc/welsCodecTrace.h
@@ -66,9 +66,9 @@
 virtual ~IWelsTrace() {};
 
 virtual int32_t  SetTraceLevel (int32_t iLevel) = 0;
-virtual int32_t  Trace (const int32_t kLevel, const str_t* kpFormat,  va_list pVl) = 0;
+virtual int32_t  Trace (const int32_t kLevel, const char* kpFormat,  va_list pVl) = 0;
 
-static void_t  WelsTrace (void_t* pObject, const int32_t kLevel, const str_t* kpFormat, va_list pVl) {
+static void  WelsTrace (void* pObject, const int32_t kLevel, const char* kpFormat, va_list pVl) {
   IWelsTrace*   pThis = (IWelsTrace*) (pObject);
 
   if (pThis) {
@@ -76,7 +76,7 @@
   }
 }
 
-static void_t WelsVTrace (void_t* pObject, const int32_t kLevel, const str_t* kpFormat, ...) {
+static void WelsVTrace (void* pObject, const int32_t kLevel, const char* kpFormat, ...) {
   IWelsTrace* pThis = (IWelsTrace*) (pObject);
 
   va_list  argptr;
@@ -96,9 +96,9 @@
 class CWelsTraceBase : public IWelsTrace {
  public:
 virtual int32_t  SetTraceLevel (int32_t iLevel);
-virtual int32_t  Trace (const int32_t kLevel, const str_t* kpFormat,  va_list pVl);
+virtual int32_t  Trace (const int32_t kLevel, const char* kpFormat,  va_list pVl);
 
-virtual int32_t  WriteString (int32_t iLevel, const str_t* pStr) = 0;
+virtual int32_t  WriteString (int32_t iLevel, const char* pStr) = 0;
  protected:
 CWelsTraceBase() {
   m_iLevel = WELS_LOG_DEFAULT;
@@ -110,11 +110,11 @@
 
 class CWelsTraceFile : public CWelsTraceBase {
  public:
-CWelsTraceFile (const str_t*   filename = (const str_t*)"wels_decoder_trace.txt");
+CWelsTraceFile (const char*   filename = (const char*)"wels_decoder_trace.txt");
 virtual ~CWelsTraceFile();
 
  public:
-virtual int32_t  WriteString (int32_t iLevel, const str_t* pStr);
+virtual int32_t  WriteString (int32_t iLevel, const char* pStr);
 
  private:
 WelsFileHandle* m_pTraceFile;
@@ -127,7 +127,7 @@
 virtual ~CWelsTraceWinDgb() {};
 
  public:
-virtual int32_t  WriteString (int32_t iLevel, const str_t* pStr);
+virtual int32_t  WriteString (int32_t iLevel, const char* pStr);
 };
 #endif
 
@@ -137,7 +137,7 @@
 virtual ~CWelsCodecTrace();
 
  public:
-virtual int32_t  WriteString (int32_t iLevel, const str_t* pStr);
+virtual int32_t  WriteString (int32_t iLevel, const char* pStr);
 
  protected:
 int32_t  LoadWelsTraceModule();
@@ -152,7 +152,7 @@
 };
 
 
-IWelsTrace*   CreateWelsTrace (EWelsTraceType  eType,  void_t* pParam = NULL);
+IWelsTrace*   CreateWelsTrace (EWelsTraceType  eType,  void* pParam = NULL);
 
 } // namespace WelsDec
 
--- a/codec/decoder/plus/inc/welsDecoderExt.h
+++ b/codec/decoder/plus/inc/welsDecoderExt.h
@@ -56,10 +56,10 @@
 
 class CWelsDecoder : public ISVCDecoder {
  public:
-CWelsDecoder (void_t);
+CWelsDecoder (void);
 virtual ~CWelsDecoder();
 
-virtual long EXTAPI Initialize (void_t* pParam, const INIT_TYPE keInitType);
+virtual long EXTAPI Initialize (void* pParam, const INIT_TYPE keInitType);
 virtual long EXTAPI Uninitialize();
 
 /***************************************************************************
@@ -83,7 +83,7 @@
 
 virtual DECODING_STATE EXTAPI DecodeFrame2 (const unsigned char* kpSrc,
                                             const int kiSrcLen,
-                                            void_t** ppDst,
+                                            void** ppDst,
                                             SBufferInfo* pDstInfo);
 virtual DECODING_STATE EXTAPI DecodeFrameEx (const unsigned char* kpSrc,
                                              const int kiSrcLen,
@@ -94,15 +94,15 @@
                                              int& iHeight,
                                              int& color_format);
 
-virtual long EXTAPI SetOption (DECODER_OPTION eOptID, void_t* pOption);
-virtual long EXTAPI GetOption (DECODER_OPTION eOptID, void_t* pOption);
+virtual long EXTAPI SetOption (DECODER_OPTION eOptID, void* pOption);
+virtual long EXTAPI GetOption (DECODER_OPTION eOptID, void* pOption);
 
  private:
 PWelsDecoderContext 				m_pDecContext;
 IWelsTrace*							m_pTrace;
 
-void_t InitDecoder (void_t);
-void_t UninitDecoder (void_t);
+void InitDecoder (void);
+void UninitDecoder (void);
 
 XMMREG_PROTECT_DECLARE(CWelsH264Decoder);
 
--- a/codec/decoder/plus/src/welsCodecTrace.cpp
+++ b/codec/decoder/plus/src/welsCodecTrace.cpp
@@ -57,14 +57,14 @@
   return 0;
 }
 
-int32_t  CWelsTraceBase::Trace (const int kLevel, const str_t* kpFormat, va_list pVl) {
+int32_t  CWelsTraceBase::Trace (const int kLevel, const char* kpFormat, va_list pVl) {
   if (kLevel & m_iLevel) {
-    str_t chBuf[MAX_LOG_SIZE] = {0};
+    char chBuf[MAX_LOG_SIZE] = {0};
     const int32_t kLen	= strlen ("[DECODER]: ");
 
-    WelsStrncpy (chBuf, MAX_LOG_SIZE, (const str_t*)"[DECODER]: ");
+    WelsStrncpy (chBuf, MAX_LOG_SIZE, (const char*)"[DECODER]: ");
 
-    WelsVsnprintf ((chBuf + kLen),  MAX_LOG_SIZE - kLen, (const str_t*)kpFormat, pVl);
+    WelsVsnprintf ((chBuf + kLen),  MAX_LOG_SIZE - kLen, (const char*)kpFormat, pVl);
 
     WriteString (kLevel, chBuf);
   }
@@ -72,8 +72,8 @@
   return 0;
 }
 
-CWelsTraceFile::CWelsTraceFile (const str_t* pFileName) {
-  m_pTraceFile = WelsFopen (pFileName, (const str_t*)"wt");
+CWelsTraceFile::CWelsTraceFile (const char* pFileName) {
+  m_pTraceFile = WelsFopen (pFileName, (const char*)"wt");
 }
 
 CWelsTraceFile::~CWelsTraceFile() {
@@ -83,9 +83,9 @@
   }
 }
 
-int32_t CWelsTraceFile::WriteString (int32_t iLevel, const str_t* pStr) {
+int32_t CWelsTraceFile::WriteString (int32_t iLevel, const char* pStr) {
   int  iRC = 0;
-  const static str_t chEnter[16] = "\n";
+  const static char chEnter[16] = "\n";
   if (m_pTraceFile) {
     iRC += WelsFwrite (pStr, 1, strlen (pStr), m_pTraceFile);
     iRC += WelsFwrite (chEnter, 1, strlen (chEnter), m_pTraceFile);
@@ -97,7 +97,7 @@
 
 #ifdef _WIN32
 
-int32_t CWelsTraceWinDgb::WriteString (int32_t iLevel, const str_t* pStr) {
+int32_t CWelsTraceWinDgb::WriteString (int32_t iLevel, const char* pStr) {
   OutputDebugStringA (pStr);
 
   return strlen (pStr);
@@ -134,7 +134,7 @@
   return 0;
 }
 
-int32_t  CWelsCodecTrace::WriteString (int32_t iLevel, const str_t* pStr) {
+int32_t  CWelsCodecTrace::WriteString (int32_t iLevel, const char* pStr) {
   {
     switch (iLevel) {
     case WELS_LOG_ERROR:
@@ -164,7 +164,7 @@
 }
 
 
-IWelsTrace*   CreateWelsTrace (EWelsTraceType  eType,  void_t* pParam) {
+IWelsTrace*   CreateWelsTrace (EWelsTraceType  eType,  void* pParam) {
   IWelsTrace*   pTrace = NULL;
   switch (eType) {
   case Wels_Trace_Type:
--- a/codec/decoder/plus/src/welsDecoderExt.cpp
+++ b/codec/decoder/plus/src/welsDecoderExt.cpp
@@ -83,16 +83,16 @@
 *
 *	return: none
 ***************************************************************************/
-CWelsDecoder::CWelsDecoder (void_t)
+CWelsDecoder::CWelsDecoder (void)
   :	m_pDecContext (NULL),
     m_pTrace (NULL) {
 #ifdef OUTPUT_BIT_STREAM
-  str_t chFileName[1024] = { 0 };  //for .264
+  char chFileName[1024] = { 0 };  //for .264
   int iBufUsed = 0;
   int iBufLeft = 1023;
   int iCurUsed;
 
-  str_t chFileNameSize[1024] = { 0 }; //for .len
+  char chFileNameSize[1024] = { 0 }; //for .len
   int iBufUsedSize = 0;
   int iBufLeftSize = 1023;
   int iCurUsedSize;
@@ -108,8 +108,8 @@
 
   WelsGetTimeOfDay (&sCurTime);
 
-  iCurUsed     = WelsSnprintf (chFileName,  iBufLeft,  "bs_0x%p_", (void_t*)this);
-  iCurUsedSize = WelsSnprintf (chFileNameSize, iBufLeftSize, "size_0x%p_", (void_t*)this);
+  iCurUsed     = WelsSnprintf (chFileName,  iBufLeft,  "bs_0x%p_", (void*)this);
+  iCurUsedSize = WelsSnprintf (chFileNameSize, iBufLeftSize, "size_0x%p_", (void*)this);
 
   if (iCurUsed > 0) {
     iBufUsed += iCurUsed;
@@ -186,7 +186,7 @@
   }
 }
 
-long CWelsDecoder::Initialize (void_t* pParam, const INIT_TYPE keInitType) {
+long CWelsDecoder::Initialize (void* pParam, const INIT_TYPE keInitType) {
   if (pParam == NULL || keInitType != INIT_TYPE_PARAMETER_BASED) {
     IWelsTrace::WelsVTrace (m_pTrace, IWelsTrace::WELS_LOG_INFO, "CWelsDecoder::Initialize(), invalid input argument.");
     return cmInitParaError;
@@ -206,7 +206,7 @@
   return ERR_NONE;
 }
 
-void_t CWelsDecoder::UninitDecoder (void_t) {
+void CWelsDecoder::UninitDecoder (void) {
   if (NULL == m_pDecContext)
     return;
 
@@ -224,7 +224,7 @@
 }
 
 // the return value of this function is not suitable, it need report failure info to upper layer.
-void_t CWelsDecoder::InitDecoder (void_t) {
+void CWelsDecoder::InitDecoder (void) {
   IWelsTrace::WelsVTrace (m_pTrace, IWelsTrace::WELS_LOG_INFO, "CWelsDecoder::init_decoder()..");
 
   m_pDecContext	= (PWelsDecoderContext)WelsMalloc (sizeof (SWelsDecoderContext), "m_pDecContext");
@@ -237,7 +237,7 @@
 /*
  * Set Option
  */
-long CWelsDecoder::SetOption (DECODER_OPTION eOptID, void_t* pOption) {
+long CWelsDecoder::SetOption (DECODER_OPTION eOptID, void* pOption) {
   int iVal = 0;
 
   if (m_pDecContext == NULL)
@@ -294,7 +294,7 @@
 /*
  *	Get Option
  */
-long CWelsDecoder::GetOption (DECODER_OPTION eOptID, void_t* pOption) {
+long CWelsDecoder::GetOption (DECODER_OPTION eOptID, void* pOption) {
   int iVal = 0;
 
   if (m_pDecContext == NULL)
@@ -359,7 +359,7 @@
 
 DECODING_STATE CWelsDecoder::DecodeFrame2 (const unsigned char* kpSrc,
     const int kiSrcLen,
-    void_t** ppDst,
+    void** ppDst,
     SBufferInfo* pDstInfo) {
   if (kiSrcLen > MAX_ACCESS_UNIT_CAPACITY) {
     m_pDecContext->iErrorCode |= dsOutOfMemory;
@@ -449,7 +449,7 @@
   DstInfo.UsrData.sSystemBuffer.iHeight = iHeight;
   DstInfo.eBufferProperty = BUFFER_HOST;
 
-  eDecState = DecodeFrame2 (kpSrc, kiSrcLen, (void_t**)ppDst, &DstInfo);
+  eDecState = DecodeFrame2 (kpSrc, kiSrcLen, (void**)ppDst, &DstInfo);
   if (eDecState == dsErrorFree) {
     pStride[0] = DstInfo.UsrData.sSystemBuffer.iStride[0];
     pStride[1] = DstInfo.UsrData.sSystemBuffer.iStride[1];
@@ -503,7 +503,7 @@
 /*
 *	DestroyDecoder
 */
-void_t DestroyDecoder (ISVCDecoder* pDecoder) {
+void DestroyDecoder (ISVCDecoder* pDecoder) {
   if (NULL != pDecoder) {
     delete (CWelsDecoder*)pDecoder;
   }
--- a/codec/encoder/core/inc/au_set.h
+++ b/codec/encoder/core/inc/au_set.h
@@ -105,7 +105,7 @@
  */
 int32_t WelsInitSps (SWelsSPS* pSps, SDLayerParam* pLayerParam, const uint32_t kuiIntraPeriod,
                      const int32_t kiNumRefFrame,
-                     const uint32_t kiSpsId, const bool_t kbEnableFrameCropping, bool_t bEnableRc);
+                     const uint32_t kiSpsId, const bool kbEnableFrameCropping, bool bEnableRc);
 
 /*!
  * \brief	initialize subset pSps based on configurable parameters in svc
@@ -117,7 +117,7 @@
  */
 int32_t WelsInitSubsetSps (SSubsetSps* pSubsetSps, SDLayerParam* pLayerParam, const uint32_t kuiIntraPeriod,
                            const int32_t kiNumRefFrame,
-                           const uint32_t kiSpsId, const bool_t kbEnableFrameCropping, bool_t bEnableRc);
+                           const uint32_t kiSpsId, const bool kbEnableFrameCropping, bool bEnableRc);
 
 /*!
  * \brief	initialize pPps based on configurable parameters and pSps(subset pSps) in svc
@@ -124,9 +124,9 @@
  * \param	pPps							SWelsPPS*
  * \param	pSps							SWelsSPS*
  * \param	pSubsetSps					SSubsetSps*
- * \param   kbDeblockingFilterPresentFlag			bool_t
+ * \param   kbDeblockingFilterPresentFlag			bool
  * \param	kiPpsId						PPS Id
- * \param	kbUsingSubsetSps					bool_t
+ * \param	kbUsingSubsetSps					bool
  * \return	0 - successful
  *			1 - failed
  */
@@ -134,8 +134,8 @@
                      SWelsSPS* pSps,
                      SSubsetSps* pSubsetSps,
                      const uint32_t kuiPpsId,
-                     const bool_t kbDeblockingFilterPresentFlag,
-                     const bool_t kbUsingSubsetSps);
+                     const bool kbDeblockingFilterPresentFlag,
+                     const bool kbUsingSubsetSps);
 
 }
 #endif//WELS_ACCESS_UNIT_PARSER_H__
--- a/codec/encoder/core/inc/bundleloader.h
+++ b/codec/encoder/core/inc/bundleloader.h
@@ -134,4 +134,4 @@
 }
 #endif
 
-#endif
\ No newline at end of file
+#endif
--- a/codec/encoder/core/inc/encoder.h
+++ b/codec/encoder/core/inc/encoder.h
@@ -81,12 +81,12 @@
  * \brief	Dump reconstruction for dependency layer
  */
 
-extern "C" void DumpDependencyRec (SPicture* pSrcPic, const str_t* kpFileName, const int8_t kiDid);
+extern "C" void DumpDependencyRec (SPicture* pSrcPic, const char* kpFileName, const int8_t kiDid);
 
 /*!
  * \brief	Dump the reconstruction pictures
  */
-void DumpRecFrame (SPicture* pSrcPic, const str_t* kpFileName);
+void DumpRecFrame (SPicture* pSrcPic, const char* kpFileName);
 
 
 /*!
--- a/codec/encoder/core/inc/encoder_context.h
+++ b/codec/encoder/core/inc/encoder_context.h
@@ -92,9 +92,9 @@
   int32_t						iLastLtrIdx;
   uint32_t					uiLtrMarkInterval;// the interval from the last int32_t term pRef mark
 
-  bool_t						bLTRMarkingFlag;	//decide whether current frame marked as LTR
-  bool_t						bLTRMarkEnable; //when LTR is confirmed and the interval is no smaller than the marking period
-  bool_t						bReceivedT0LostFlag;	// indicate whether a t0 lost feedback is recieved, for LTR recovery
+  bool						bLTRMarkingFlag;	//decide whether current frame marked as LTR
+  bool						bLTRMarkEnable; //when LTR is confirmed and the interval is no smaller than the marking period
+  bool						bReceivedT0LostFlag;	// indicate whether a t0 lost feedback is recieved, for LTR recovery
 } SLTRState;
 
 typedef struct TagSpatialPicIndex {
@@ -162,8 +162,8 @@
 
   uint8_t						uiDependencyId;	// Idc of dependecy layer to be coded
   uint8_t						uiTemporalId;	// Idc of temporal layer to be coded
-  bool_t						bNeedPrefixNalFlag;	// whether add prefix nal
-  bool_t                      bEncCurFrmAsIdrFlag;
+  bool						bNeedPrefixNalFlag;	// whether add prefix nal
+  bool                      bEncCurFrmAsIdrFlag;
 
   // Rate control routine
   SWelsSvcRc*					pWelsSvcRc;
@@ -198,7 +198,7 @@
   uint8_t						uiSpatialLayersInTemporal[MAX_DEPENDENCY_LAYER];
 
   uint8_t                     uiSpatialPicNum[MAX_DEPENDENCY_LAYER];
-  bool_t						bLongTermRefFlag[MAX_DEPENDENCY_LAYER][MAX_TEMPORAL_LEVEL + 1/*+LONG_TERM_REF_NUM*/];
+  bool						bLongTermRefFlag[MAX_DEPENDENCY_LAYER][MAX_TEMPORAL_LEVEL + 1/*+LONG_TERM_REF_NUM*/];
 
   int16_t						iMaxSliceCount;// maximal count number of slices for all layers observation
   int16_t						iActiveThreadsNum;	// number of threads active so far
--- a/codec/encoder/core/inc/mb_cache.h
+++ b/codec/encoder/core/inc/mb_cache.h
@@ -106,14 +106,14 @@
 uint8_t* pBufferInterPredMe;    // [4][400] is enough because only h&v or v&hv or h&hv. but if both h&v&hv is needed when 8 quart pixel, future we have to use [5][400].
 
 //no scan4[] order, just as memory order to store
-//ALIGNED_DECLARE(bool_t, pPrevIntra4x4PredModeFlag[16], 16);//if 1, means no rem_intra4x4_pred_mode; if 0, means rem_intra4x4_pred_mode != 0
-bool_t* pPrevIntra4x4PredModeFlag;
+//ALIGNED_DECLARE(bool, pPrevIntra4x4PredModeFlag[16], 16);//if 1, means no rem_intra4x4_pred_mode; if 0, means rem_intra4x4_pred_mode != 0
+bool* pPrevIntra4x4PredModeFlag;
 //ALIGNED_DECLARE(int8_t, pRemIntra4x4PredModeFlag[16], 16);//-1 as default; if pPrevIntra4x4PredModeFlag==0,
 //pRemIntra4x4PredModeFlag or added by 1 is the best pred_mode
 int8_t* pRemIntra4x4PredModeFlag;
 
 int32_t     iSadCostSkip[4];	     //avail 1; unavail 0
-bool_t      bMbTypeSkip[4];         //1: skip; 0: non-skip
+bool      bMbTypeSkip[4];         //1: skip; 0: non-skip
 int32_t*     pEncSad;
 
 //for residual encoding at the side of Encoder
@@ -123,7 +123,7 @@
 uint8_t uiLumaI16x16Mode;
 uint8_t uiChmaI8x8Mode;
 
-bool_t		bCollocatedPredFlag;//denote if current MB is collocated predicted (MV==0).
+bool		bCollocatedPredFlag;//denote if current MB is collocated predicted (MV==0).
 uint32_t	uiRefMbType;
 
 struct {
--- a/codec/encoder/core/inc/md.h
+++ b/codec/encoder/core/inc/md.h
@@ -83,7 +83,7 @@
 int32_t			iSadPredMb;
 
 uint8_t			uiRef; //uiRefIndex appointed by Encoder, used for MC
-bool_t			bMdUsingSad;
+bool			bMdUsingSad;
 uint16_t		uiReserved;
 
 int32_t			iCostSkipMb;
@@ -114,7 +114,7 @@
 static void md_intra_init (sWelsEncCtx* pEncCtx, SWelsMD* pWelsMd, SMB* pCurMb);
 static void md_inter_init (sWelsEncCtx* pEncCtx, SWelsMD* pWelsMd, SMB* pCurMb);
 
-void FillNeighborCacheIntra (SMbCache* pMbCache, SMB* pCurMb, int32_t iMbWidth/*, bool_t constrained_intra_pred_flag*/);
+void FillNeighborCacheIntra (SMbCache* pMbCache, SMB* pCurMb, int32_t iMbWidth/*, bool constrained_intra_pred_flag*/);
 void FillNeighborCacheInterWithoutBGD (SMbCache* pMbCache, SMB* pCurMb, int32_t iMbWidth,
                                        int8_t* pVaaBgMbFlag); //BGD spatial func
 void FillNeighborCacheInterWithBGD (SMbCache* pMbCache, SMB* pCurMb, int32_t iMbWidth, int8_t* pVaaBgMbFlag);
@@ -125,12 +125,12 @@
 void PredictSad (int8_t* pRefIndexCache, int32_t* pSadCostCache, int32_t uiRef, int32_t* pSadPred);
 
 
-void PredictSadSkip (int8_t* pRefIndexCache, bool_t* pMbSkipCache, int32_t* pSadCostCache, int32_t uiRef,
+void PredictSadSkip (int8_t* pRefIndexCache, bool* pMbSkipCache, int32_t* pSadCostCache, int32_t uiRef,
                      int32_t* iSadPredSkip);
 
 //  for pfGetVarianceFromIntraVaa function ptr adaptive by CPU features, 6/7/2010
 void InitIntraAnalysisVaaInfo (SWelsFuncPtrList* pFuncList, const uint32_t kuiCpuFlag);
-BOOL_T MdIntraAnalysisVaaInfo (sWelsEncCtx* pEncCtx, uint8_t* pEncMb);
+bool MdIntraAnalysisVaaInfo (sWelsEncCtx* pEncCtx, uint8_t* pEncMb);
 
 uint8_t MdInterAnalysisVaaInfo_c (int32_t* pSad8x8);
 
--- a/codec/encoder/core/inc/memory_align.h
+++ b/codec/encoder/core/inc/memory_align.h
@@ -46,9 +46,9 @@
 CMemoryAlign (const uint32_t kuiCacheLineSize);
 virtual ~CMemoryAlign();
 
-void* WelsMallocz (const uint32_t kuiSize, const str_t* kpTag);
-void* WelsMalloc (const uint32_t kuiSize, const str_t* kpTag);
-void WelsFree (void* pPointer, const str_t* kpTag);
+void* WelsMallocz (const uint32_t kuiSize, const char* kpTag);
+void* WelsMalloc (const uint32_t kuiSize, const char* kpTag);
+void WelsFree (void* pPointer, const char* kpTag);
 const uint32_t WelsGetCacheLineSize() const;
 #if defined(MEMORY_MONITOR)
 const uint32_t WelsGetMemoryUsage() const;
--- a/codec/encoder/core/inc/nal_encap.h
+++ b/codec/encoder/core/inc/nal_encap.h
@@ -73,7 +73,7 @@
 // SVC: num_sps (MAX_D) + num_pps (MAX_D) + num_vcl (MAX_D * MAX_Q)
 int32_t				iNalIndex;			// coding NAL currently, 0 based
 
-//	BOOL_T				bAnnexBFlag;		// annexeb flag, to figure it pOut the packetization mode whether need 4 bytes (0 0 0 1) of start code prefix
+//	bool				bAnnexBFlag;		// annexeb flag, to figure it pOut the packetization mode whether need 4 bytes (0 0 0 1) of start code prefix
 } SWelsEncoderOutput;
 
 //#define MT_DEBUG_BS_WR	0	// for MT debugging if needed
@@ -91,9 +91,9 @@
 int32_t				iNalLen[2];
 int32_t				iNalIndex;			// coding NAL currently, 0 based
 
-//	BOOL_T				bAnnexBFlag;		// annexeb flag, to figure it pOut the packetization mode whether need 4 bytes (0 0 0 1) of start code prefix
+//	bool				bAnnexBFlag;		// annexeb flag, to figure it pOut the packetization mode whether need 4 bytes (0 0 0 1) of start code prefix
 #if MT_DEBUG_BS_WR
-BOOL_T				bSliceCodedFlag;
+bool				bSliceCodedFlag;
 #endif//MT_DEBUG_BS_WR
 } SWelsSliceBs;
 
@@ -145,6 +145,6 @@
 /*!
  * \brief	write prefix nal
  */
-int32_t WelsWriteSVCPrefixNal (SBitStringAux* pBitStringAux, const int32_t keNalRefIdc, const bool_t kbIdrFlag);
+int32_t WelsWriteSVCPrefixNal (SBitStringAux* pBitStringAux, const int32_t keNalRefIdc, const bool kbIdrFlag);
 }
 #endif//WELS_NAL_UNIT_ENCAPSULATION_H__
--- a/codec/encoder/core/inc/nal_prefix.h
+++ b/codec/encoder/core/inc/nal_prefix.h
@@ -53,10 +53,10 @@
 typedef struct TagNalUnitHeaderExt {
   SNalUnitHeader	sNalHeader;
 
-  bool_t		bIdrFlag;
+  bool		bIdrFlag;
   uint8_t		uiDependencyId;
   uint8_t		uiTemporalId;
-  bool_t		bDiscardableFlag;
+  bool		bDiscardableFlag;
 
 
 } SNalUnitHeaderExt, *PNalUnitHeaderExt;
--- a/codec/encoder/core/inc/param_svc.h
+++ b/codec/encoder/core/inc/param_svc.h
@@ -102,7 +102,7 @@
 float		fOutputFrameRate;		// output frame rate
 
 #ifdef ENABLE_FRAME_DUMP
-str_t		sRecFileName[MAX_FNAME_LEN];	// file to be constructed
+char		sRecFileName[MAX_FNAME_LEN];	// file to be constructed
 #endif//ENABLE_FRAME_DUMP
 } SDLayerParam;
 
@@ -127,7 +127,7 @@
   int32_t iHeight;
 } SUsedPicRect;	// the rect in input picture that encoder actually used
 
-str_t*       pCurPath; // record current lib path such as:/pData/pData/com.wels.enc/lib/
+char*       pCurPath; // record current lib path such as:/pData/pData/com.wels.enc/lib/
 
 float		fMaxFrameRate;		// maximal frame rate [Hz / fps]
 int32_t		iInputCsp;			// color space of input sequence
@@ -140,13 +140,13 @@
 int32_t		iLTRRefNum;
 uint32_t    uiLtrMarkPeriod;	//the min distance of two int32_t references
 
-bool_t		bDeblockingParallelFlag;	// deblocking filter parallelization control flag
-bool_t		bMgsT0OnlyStrategy; //MGS_T0_only_strategy
-bool_t		bEnableSSEI;
-bool_t		bEnableFrameCroppingFlag;	// enable frame cropping flag: TRUE alwayse in application
+bool		bDeblockingParallelFlag;	// deblocking filter parallelization control flag
+bool		bMgsT0OnlyStrategy; //MGS_T0_only_strategy
+bool		bEnableSSEI;
+bool		bEnableFrameCroppingFlag;	// enable frame cropping flag: true alwayse in application
 
-bool_t		bEnableCropPic;			// enable cropping source picture. , 8/25/2010
-// FALSE: Streaming Video Sharing; TRUE: Video Conferencing Meeting;
+bool		bEnableCropPic;			// enable cropping source picture. , 8/25/2010
+// false: Streaming Video Sharing; true: Video Conferencing Meeting;
 int8_t		iDecompStages;		// GOP size dependency
 
 /* Deblocking loop filter */
@@ -159,27 +159,27 @@
 int8_t		iInterLayerLoopFilterBetaOffset;	// InterLayerLoopFilterBetaOffset
 
 /* Rate Control */
-bool_t		bEnableRc;
+bool		bEnableRc;
 int8_t		iRCMode;
 int8_t		iPaddingFlag;
 /* denoise control */
-bool_t      bEnableDenoise;
+bool      bEnableDenoise;
 
 /* scene change detection control */
-bool_t      bEnableSceneChangeDetect;
+bool      bEnableSceneChangeDetect;
 // background detection control
-bool_t		bEnableBackgroundDetection;
+bool		bEnableBackgroundDetection;
 /* adaptive quantization control */
-bool_t		bEnableAdaptiveQuant;
+bool		bEnableAdaptiveQuant;
 /* frame skipping */
-bool_t		bEnableFrameSkip;
+bool		bEnableFrameSkip;
 /* long term reference control */
-bool_t      bEnableLongTermReference;
+bool      bEnableLongTermReference;
 
 /* pSps pPps id addition control */
-bool_t      bEnableSpsPpsIdAddition;
+bool      bEnableSpsPpsIdAddition;
 /* Layer definition */
-bool_t		bPrefixNalAddingCtrl;
+bool		bPrefixNalAddingCtrl;
 int8_t		iNumDependencyLayer;	// number of dependency(Spatial/CGS) layers used to be encoded
 int8_t		iNumTemporalLayer;		// number of temporal layer specified
 
@@ -186,12 +186,12 @@
 
 
  public:
-TagWelsSvcCodingParam (const bool_t kbEnableRc = true) {
+TagWelsSvcCodingParam (const bool kbEnableRc = true) {
   FillDefault (kbEnableRc);
 }
 ~TagWelsSvcCodingParam()	{}
 
-void FillDefault (const bool_t kbEnableRc) {
+void FillDefault (const bool kbEnableRc) {
   uiGopSize			= 1;			// GOP size (at maximal frame rate: 16)
   uiIntraPeriod		= 0;			// intra period (multiple of GOP size as desired)
   iNumRefFrame		= MIN_REF_PIC_COUNT;	// number of reference frame used
@@ -225,9 +225,9 @@
   bMgsT0OnlyStrategy			=
     true;	// Strategy of have MGS only at T0 frames (0: do not use this strategy; 1: use this strategy)
   bEnableSSEI					= true;
-  bEnableFrameCroppingFlag	= true;	// enable frame cropping flag: TRUE alwayse in application
+  bEnableFrameCroppingFlag	= true;	// enable frame cropping flag: true alwayse in application
   bEnableCropPic				= true;	// enable cropping source picture. , 8/25/2010
-  // FALSE: Streaming Video Sharing; TRUE: Video Conferencing Meeting;
+  // false: Streaming Video Sharing; true: Video Conferencing Meeting;
   iDecompStages				= 0;	// GOP size dependency, unknown here and be revised later
 
   /* Deblocking loop filter */
@@ -257,7 +257,7 @@
   memset(sDependencyLayers,0,sizeof(SDLayerParam)*MAX_DEPENDENCY_LAYER);
 }
 
-int32_t ParamTranscode (SVCEncodingParam& pCodingParam, const bool_t kbEnableRc = true) {
+int32_t ParamTranscode (SVCEncodingParam& pCodingParam, const bool kbEnableRc = true) {
   pCodingParam.fFrameRate		= WELS_CLIP3 (pCodingParam.fFrameRate, MIN_FRAME_RATE, MAX_FRAME_RATE);
   iInputCsp		= pCodingParam.iInputCsp;		// color space of input sequence
   uiFrameToBeCoded	= (uint32_t) -
--- a/codec/encoder/core/inc/parameter_sets.h
+++ b/codec/encoder/core/inc/parameter_sets.h
@@ -67,24 +67,24 @@
 //	uint8_t		uiBitDepthLuma;         //=8, only used in decoder, encoder in general_***; it can be removed when removed general up_sample
 //	uint8_t		uiBitDepthChroma;		//=8
 /* TO BE CONTINUE: POC type 1 */
-//	bool_t		bDeltaPicOrderAlwaysZeroFlag;
-//	bool_t		bGapsInFrameNumValueAllowedFlag;	//=true
+//	bool		bDeltaPicOrderAlwaysZeroFlag;
+//	bool		bGapsInFrameNumValueAllowedFlag;	//=true
 
-//	bool_t		bFrameMbsOnlyFlag;
-//	bool_t		bMbaffFlag;	// MB Adapative Frame Field
-//	bool_t		bDirect8x8InferenceFlag;
-bool_t		bFrameCroppingFlag;
+//	bool		bFrameMbsOnlyFlag;
+//	bool		bMbaffFlag;	// MB Adapative Frame Field
+//	bool		bDirect8x8InferenceFlag;
+bool		bFrameCroppingFlag;
 
-//	bool_t		bVuiParamPresentFlag;
-//	bool_t		bTimingInfoPresentFlag;
-//	bool_t		bFixedFrameRateFlag;
+//	bool		bVuiParamPresentFlag;
+//	bool		bTimingInfoPresentFlag;
+//	bool		bFixedFrameRateFlag;
 
-bool_t		bConstraintSet0Flag;
-bool_t		bConstraintSet1Flag;
-bool_t		bConstraintSet2Flag;
+bool		bConstraintSet0Flag;
+bool		bConstraintSet1Flag;
+bool		bConstraintSet2Flag;
 
-//	bool_t		bConstraintSet3Flag;		// reintroduce constrain_set3_flag instead of reserved filling bytes here
-//	bool_t		bSeparateColorPlaneFlag;  // =false,: only used in decoder, encoder in general_***; it can be removed when removed general up_sample
+//	bool		bConstraintSet3Flag;		// reintroduce constrain_set3_flag instead of reserved filling bytes here
+//	bool		bSeparateColorPlaneFlag;  // =false,: only used in decoder, encoder in general_***; it can be removed when removed general up_sample
 
 } SWelsSPS, *PWelsSPS;
 
@@ -98,10 +98,10 @@
 //	uint8_t		uiChromaPhaseYPlus1;
 //	uint8_t		uiSeqRefLayerChromaPhaseXPlus1Flag;
 //	uint8_t		uiSeqRefLayerChromaPhaseYPlus1;
-//	bool_t		bInterLayerDeblockingFilterCtrlPresentFlag;
-bool_t		bSeqTcoeffLevelPredFlag;
-bool_t		bAdaptiveTcoeffLevelPredFlag;
-bool_t		bSliceHeaderRestrictionFlag;
+//	bool		bInterLayerDeblockingFilterCtrlPresentFlag;
+bool		bSeqTcoeffLevelPredFlag;
+bool		bAdaptiveTcoeffLevelPredFlag;
+bool		bSliceHeaderRestrictionFlag;
 } SSpsSvcExt, *PSpsSvcExt;
 
 /* Subset sequence parameter set syntax, refer to Page 391 in JVT X201wcm */
@@ -109,9 +109,9 @@
 SWelsSPS		pSps;
 SSpsSvcExt	sSpsSvcExt;
 
-//	bool_t		bSvcVuiParamPresentFlag;
-//	bool_t		bAdditionalExtension2Flag;
-//	bool_t		bAdditionalExtension2DataFlag;
+//	bool		bSvcVuiParamPresentFlag;
+//	bool		bAdditionalExtension2Flag;
+//	bool		bAdditionalExtension2DataFlag;
 } SSubsetSps, *PSubsetSps;
 
 /* Picture parameter set syntax, refer to Page 59 in JVT X201wcm */
@@ -129,7 +129,7 @@
 uint32_t	uiBottomRight[MAX_SLICEGROUP_IDS];
 /* uiSliceGroupMapType = 3, 4 or 5 */
 /* uiSliceGroupMapType = 3, 4 or 5 */
-bool_t		bSliceGroupChangeDirectionFlag;
+bool		bSliceGroupChangeDirectionFlag;
 uint32_t	uiSliceGroupChangeRate;
 /* uiSliceGroupMapType = 6 */
 uint32_t	uiPicSizeInMapUnits;
@@ -147,13 +147,13 @@
 //	int32_t		iSecondChromaQpIndexOffset;
 //	/* potential application for High profile */
 
-//	bool_t		bPicOrderPresentFlag;
+//	bool		bPicOrderPresentFlag;
 
-bool_t		bDeblockingFilterControlPresentFlag;
+bool		bDeblockingFilterControlPresentFlag;
 
-//	bool_t		bConstainedIntraPredFlag;
-//	bool_t		bRedundantPicCntPresentFlag;
-//	bool_t		bWeightedPredFlag;
+//	bool		bConstainedIntraPredFlag;
+//	bool		bRedundantPicCntPresentFlag;
+//	bool		bWeightedPredFlag;
 //	uint8_t		uiWeightedBiPredIdc;
 
 } SWelsPPS, *PWelsPPPS;
--- a/codec/encoder/core/inc/picture.h
+++ b/codec/encoder/core/inc/picture.h
@@ -72,8 +72,8 @@
   int32_t		iMarkFrameNum;
   int32_t		iLongTermPicNum;
 
-  bool_t		bUsedAsRef;						//for pRef pic management
-  bool_t		bIsLongRef;	// long term reference frame flag	//for pRef pic management
+  bool		bUsedAsRef;						//for pRef pic management
+  bool		bIsLongRef;	// long term reference frame flag	//for pRef pic management
   uint8_t		uiRecieveConfirmed;
   uint8_t		uiTemporalId;
   uint8_t		uiSpatialId;
--- a/codec/encoder/core/inc/picture_handle.h
+++ b/codec/encoder/core/inc/picture_handle.h
@@ -52,7 +52,7 @@
  * \pram	need_expand		need borders expanding
  * \return	successful if effective picture pointer returned, otherwise failed with NULL
  */
-SPicture* AllocPicture (CMemoryAlign* pMa, const int32_t kiWidth, const int32_t kiHeight, bool_t bNeedMbInfo);
+SPicture* AllocPicture (CMemoryAlign* pMa, const int32_t kiWidth, const int32_t kiHeight, bool bNeedMbInfo);
 
 /*!
  * \brief	free picture pData planes
--- a/codec/encoder/core/inc/property.h
+++ b/codec/encoder/core/inc/property.h
@@ -51,7 +51,7 @@
  * \param	iSize	size of pBuffer overall
  * \return	actual size of pBuffer used; 0 returned in failure
  */
-int32_t GetCodeName (str_t* pBuf, int32_t iSize);
+int32_t GetCodeName (char* pBuf, int32_t iSize);
 
 /*!
  * \brief	get library/module name
@@ -59,7 +59,7 @@
  * \param	iSize	size of pBuffer overall
  * \return	actual size of pBuffer used; 0 returned in failure
  */
-int32_t GetLibName (str_t* pBuf, int32_t iSize);
+int32_t GetLibName (char* pBuf, int32_t iSize);
 
 /*!
  * \brief	get version number
@@ -67,7 +67,7 @@
  * \param	iSize	size of pBuffer overall
  * \return	actual size of pBuffer used; 0 returned in failure
  */
-int32_t GetVerNum (str_t* pBuf, int32_t iSize);
+int32_t GetVerNum (char* pBuf, int32_t iSize);
 
 /*!
  * \brief	get identify information
@@ -75,6 +75,6 @@
  * \param	iSize	size of pBuffer overall
  * \return	actual size of pBuffer used; 0 returned in failure
  */
-int32_t GetIdentInfo (str_t* pBuf, int32_t iSize);
+int32_t GetIdentInfo (char* pBuf, int32_t iSize);
 }
 #endif//WELS_DECODER_PROPERTY_H__
--- a/codec/encoder/core/inc/ref_list_mgr_svc.h
+++ b/codec/encoder/core/inc/ref_list_mgr_svc.h
@@ -77,11 +77,11 @@
 /*
  *	update reference picture list
  */
-BOOL_T WelsUpdateRefList (sWelsEncCtx* pCtx);
+bool WelsUpdateRefList (sWelsEncCtx* pCtx);
 /*
  *	build reference picture list
  */
-BOOL_T WelsBuildRefList (sWelsEncCtx* pCtx, const int32_t kiPOC);
+bool WelsBuildRefList (sWelsEncCtx* pCtx, const int32_t kiPOC);
 
 /*
  *	update syntax for reference base related
@@ -92,7 +92,7 @@
 /*
 * check current mark iFrameNum used in LTR list or not
 */
-bool_t CheckCurMarkFrameNumUsed (sWelsEncCtx* pCtx);
+bool CheckCurMarkFrameNumUsed (sWelsEncCtx* pCtx);
 /*
 *	decide whether current frame include long term reference mark and update long term reference mark syntax
 */
--- a/codec/encoder/core/inc/slice.h
+++ b/codec/encoder/core/inc/slice.h
@@ -75,9 +75,9 @@
 
   //	int32_t		mmco_index;
   uint8_t		uiMmcoCount;
-  bool_t		bNoOutputOfPriorPicsFlag;
-  bool_t		bLongTermRefFlag;
-  bool_t		bAdaptiveRefPicMarkingModeFlag;
+  bool		bNoOutputOfPriorPicsFlag;
+  bool		bLongTermRefFlag;
+  bool		bAdaptiveRefPicMarkingModeFlag;
 } SRefPicMarking;
 
 
@@ -118,9 +118,9 @@
   uint16_t    uiIdrPicId;
 //	uint8_t		color_plane_id;//from?
 
-  bool_t		bNumRefIdxActiveOverrideFlag;
-//	bool_t		field_pic_flag;		//not supported in base profile
-//	bool_t		bottom_field_flag;		//not supported in base profile
+  bool		bNumRefIdxActiveOverrideFlag;
+//	bool		field_pic_flag;		//not supported in base profile
+//	bool		bottom_field_flag;		//not supported in base profile
   uint8_t		uiPadding1Bytes;
 
   SRefPicMarking		sRefMarking;	// Decoded reference picture marking syntaxs
@@ -137,18 +137,18 @@
 
   uint32_t	uiNumMbsInSlice;
 
-  bool_t		bStoreRefBasePicFlag;
-  bool_t		bConstrainedIntraResamplingFlag;
-  bool_t		bSliceSkipFlag;
+  bool		bStoreRefBasePicFlag;
+  bool		bConstrainedIntraResamplingFlag;
+  bool		bSliceSkipFlag;
 
-  bool_t		bAdaptiveBaseModeFlag;
-  bool_t		bDefaultBaseModeFlag;
-  bool_t		bAdaptiveMotionPredFlag;
-  bool_t		bDefaultMotionPredFlag;
+  bool		bAdaptiveBaseModeFlag;
+  bool		bDefaultBaseModeFlag;
+  bool		bAdaptiveMotionPredFlag;
+  bool		bDefaultMotionPredFlag;
 
-  bool_t		bAdaptiveResidualPredFlag;
-  bool_t		bDefaultResidualPredFlag;
-  bool_t		bTcoeffLevelPredFlag;
+  bool		bAdaptiveResidualPredFlag;
+  bool		bDefaultResidualPredFlag;
+  bool		bTcoeffLevelPredFlag;
   uint8_t		uiDisableInterLayerDeblockingFilterIdc;
 
 } SSliceHeaderExt, *PSliceHeaderExt;
@@ -170,10 +170,10 @@
   uint8_t		sScaleShift;
 
   uint8_t		uiSliceIdx;
-  bool_t		bSliceHeaderExtFlag; // Indicate which slice header is used, avc or ext?
+  bool		bSliceHeaderExtFlag; // Indicate which slice header is used, avc or ext?
   uint8_t		uiLastMbQp;		// stored qp for last mb coded, maybe more efficient for mb skip detection etc.
 
-  bool_t		bDynamicSlicingSliceSizeCtrlFlag;
+  bool		bDynamicSlicingSliceSizeCtrlFlag;
   uint8_t		uiAssumeLog2BytePerMb;
   uint8_t		uiReservedFillByte;	// reserved to meet 4 bytes alignment
 } SSlice, *PSlice;
--- a/codec/encoder/core/inc/slice_multi_threading.h
+++ b/codec/encoder/core/inc/slice_multi_threading.h
@@ -98,10 +98,10 @@
 
 #ifdef _WIN32
 int32_t FiredSliceThreads (SSliceThreadPrivateData* pPriData, WELS_EVENT* pEventsList, SLayerBSInfo* pLayerBsInfo,
-                           const uint32_t kuiNumThreads/*, int32_t *iLayerNum*/, SSliceCtx* pSliceCtx, const BOOL_T kbIsDynamicSlicingMode);
+                           const uint32_t kuiNumThreads/*, int32_t *iLayerNum*/, SSliceCtx* pSliceCtx, const bool kbIsDynamicSlicingMode);
 #else
 int32_t FiredSliceThreads (SSliceThreadPrivateData* pPriData, WELS_EVENT** ppEventsList, SLayerBSInfo* pLayerBsInfo,
-                           const uint32_t kuiNumThreads/*, int32_t *iLayerNum*/, SSliceCtx* pSliceCtx, const BOOL_T kbIsDynamicSlicingMode);
+                           const uint32_t kuiNumThreads/*, int32_t *iLayerNum*/, SSliceCtx* pSliceCtx, const bool kbIsDynamicSlicingMode);
 #endif//_WIN32
 
 int32_t DynamicDetectCpuCores();
--- a/codec/encoder/core/inc/svc_base_layer_md.h
+++ b/codec/encoder/core/inc/svc_base_layer_md.h
@@ -56,8 +56,8 @@
 
 void WelsMdIntraMb (sWelsEncCtx* pEncCtx, SWelsMD* pWelsMd, SMB* pCurMb, SMbCache* pMbCache);
 
-void WelsMdBackgroundMbEnc (void* pEnc, void* pMd, SMB* pCurMb, SMbCache* pMbCache, SSlice* pSlice, bool_t bSkipMbFlag);
-BOOL_T WelsMdPSkipEnc (void* pEnc, void* pMd, SMB* pCurMb, SMbCache* pMbCache);
+void WelsMdBackgroundMbEnc (void* pEnc, void* pMd, SMB* pCurMb, SMbCache* pMbCache, SSlice* pSlice, bool bSkipMbFlag);
+bool WelsMdPSkipEnc (void* pEnc, void* pMd, SMB* pCurMb, SMbCache* pMbCache);
 int32_t WelsMdP16x16 (SWelsFuncPtrList* pFunc, SDqLayer* pCurDqLayer, SWelsMD* pWelsMd, SSlice* pSlice, SMB* pCurMb);
 
 int32_t WelsMdP16x8 (SWelsFuncPtrList* pFunc, SDqLayer* pCurDqLayer, SWelsMD* pWelsMd, SSlice* pSlice);
@@ -67,25 +67,25 @@
 /*static*/ void WelsMdInterFinePartition (void* pEnc, void* pMd, SSlice* pSlice, SMB* pCurMb, int32_t bestCost);
 /*static*/ void WelsMdInterFinePartitionVaa (void* pEnc, void* pMd, SSlice* pSlice, SMB* pCurMb, int32_t bestCost);
 void WelsMdInterMbRefinement (sWelsEncCtx* pEncCtx, SWelsMD* pWelsMd, SMB* pCurMb, SMbCache* pMbCache);
-BOOL_T WelsMdFirstIntraMode (void* pEnc, void* pMd, SMB* pCurMb, SMbCache* pMbCache);
-//BOOL_T svc_md_first_intra_mode_constrained(void* pEnc, void* pMd, SMB* pCurMb, SMbCache *pMbCache);
+bool WelsMdFirstIntraMode (void* pEnc, void* pMd, SMB* pCurMb, SMbCache* pMbCache);
+//bool svc_md_first_intra_mode_constrained(void* pEnc, void* pMd, SMB* pCurMb, SMbCache *pMbCache);
 void WelsMdInterMb (void* pEncCtx, void* pWelsMd, SSlice* pSlice, SMB* pCurMb, SMbCache* pUnused);
 
 //both used in BL and EL
-//void wels_md_inter_init ( SWelsMD* pMd, const uint8_t ref_idx, const bool_t is_highest_dlayer_flag );
+//void wels_md_inter_init ( SWelsMD* pMd, const uint8_t ref_idx, const bool is_highest_dlayer_flag );
 
-bool_t WelsMdInterJudgeBGDPskip (void* pEnc, void* pMd, SSlice* pSlice, SMB* pCurMb, SMbCache* pMbCache,
-                                 BOOL_T* bKeepSkip);
-bool_t WelsMdInterJudgeBGDPskipFalse (void* pEnc, void* pMd, SSlice* pSlice, SMB* pCurMb, SMbCache* pMbCache,
-                                      BOOL_T* bKeepSkip);
+bool WelsMdInterJudgeBGDPskip (void* pEnc, void* pMd, SSlice* pSlice, SMB* pCurMb, SMbCache* pMbCache,
+                                 bool* bKeepSkip);
+bool WelsMdInterJudgeBGDPskipFalse (void* pEnc, void* pMd, SSlice* pSlice, SMB* pCurMb, SMbCache* pMbCache,
+                                      bool* bKeepSkip);
 
-void WelsMdInterUpdateBGDInfo (SDqLayer* pCurLayer,  SMB* pCurMb, const bool_t kbCollocatedPredFlag,
+void WelsMdInterUpdateBGDInfo (SDqLayer* pCurLayer,  SMB* pCurMb, const bool kbCollocatedPredFlag,
                                const int32_t kiRefPictureType);
-void WelsMdInterUpdateBGDInfoNULL (SDqLayer* pCurLayer,  SMB* pCurMb, const bool_t kbCollocatedPredFlag,
+void WelsMdInterUpdateBGDInfoNULL (SDqLayer* pCurLayer,  SMB* pCurMb, const bool kbCollocatedPredFlag,
                                    const int32_t kiRefPictureType);
 
-bool_t WelsMdInterJudgePskip (sWelsEncCtx* pEncCtx, SWelsMD* pWelsMd, SSlice* pSlice, SMB* pCurMb, SMbCache* pMbCache,
-                              BOOL_T bTrySkip);
+bool WelsMdInterJudgePskip (sWelsEncCtx* pEncCtx, SWelsMD* pWelsMd, SSlice* pSlice, SMB* pCurMb, SMbCache* pMbCache,
+                              bool bTrySkip);
 void WelsMdInterUpdatePskip (SDqLayer* pCurDqLayer, SSlice* pSlice, SMB* pCurMb, SMbCache* pMbCache);
 void WelsMdInterDecidedPskip (sWelsEncCtx* pEncCtx, SSlice* pSlice, SMB* pCurMb, SMbCache* pMbCache);
 
@@ -96,7 +96,7 @@
                                      const SWelsMD* kpMd);
 
 void WelsMdInterSecondaryModesEnc (sWelsEncCtx* pEncCtx, SWelsMD* pWelsMd, SSlice* pSlice, SMB* pCurMb,
-                                   SMbCache* pMbCache, const BOOL_T kbSkip);
+                                   SMbCache* pMbCache, const bool kbSkip);
 void WelsMdIntraSecondaryModesEnc (sWelsEncCtx* pEncCtx, SWelsMD* pWelsMd, SMB* pCurMb, SMbCache* pMbCache);
 //end of: both used in BL and EL
 
--- a/codec/encoder/core/inc/svc_enc_frame.h
+++ b/codec/encoder/core/inc/svc_enc_frame.h
@@ -84,7 +84,7 @@
   int16_t					iMbWidth;		// MB width of this picture, equal to pSps.iMbWidth
   int16_t					iMbHeight;		// MB height of this picture, equal to pSps.iMbHeight;
 
-  bool_t					bBaseLayerAvailableFlag;	// whether base layer is available for prediction?
+  bool					bBaseLayerAvailableFlag;	// whether base layer is available for prediction?
   uint8_t					iLoopFilterDisableIdc;	// 0: on, 1: off, 2: on except for slice boundaries
   int8_t					iLoopFilterAlphaC0Offset;// AlphaOffset: valid range [-6, 6], default 0
   int8_t					iLoopFilterBetaOffset;	// BetaOffset:	valid range [-6, 6], default 0
@@ -91,7 +91,7 @@
   uint8_t				    uiDisableInterLayerDeblockingFilterIdc;
   int8_t					iInterLayerSliceAlphaC0Offset;
   int8_t					iInterLayerSliceBetaOffset;
-  bool_t					bDeblockingParallelFlag; //parallel_deblocking_flag
+  bool					bDeblockingParallelFlag; //parallel_deblocking_flag
 
   SPicture*				pRefPic;			// reference picture pointer
   SPicture*				pDecPic;			// reconstruction picture pointer for layer
--- a/codec/encoder/core/inc/svc_enc_golomb.h
+++ b/codec/encoder/core/inc/svc_enc_golomb.h
@@ -237,7 +237,7 @@
 }
 
 
-static inline BOOL_T   BsCheckByteAlign (SBitStringAux* pBs) {
+static inline bool   BsCheckByteAlign (SBitStringAux* pBs) {
 return ! (pBs->iLeftBits & 0x7);
 }
 
--- a/codec/encoder/core/inc/svc_enc_slice_segment.h
+++ b/codec/encoder/core/inc/svc_enc_slice_segment.h
@@ -136,7 +136,7 @@
  */
 int32_t InitSlicePEncCtx (SSliceCtx* pSliceCtx,
                           CMemoryAlign* pMa,
-                          bool_t bFmoUseFlag,
+                          bool bFmoUseFlag,
                           int32_t iMbWidth,
                           int32_t iMbHeight,
                           SMulSliceOption* pMulSliceOption,
@@ -212,9 +212,9 @@
 //checking valid para
 int32_t DynamicMaxSliceNumConstraint (uint32_t uiMaximumNum, int32_t uiConsumedNum, uint32_t uiDulplicateTimes);
 
-bool_t CheckFixedSliceNumMultiSliceSetting (const int32_t kiMbNumInFrame,  SSliceArgument* pSliceArg);
-bool_t CheckRasterMultiSliceSetting (const int32_t kiMbNumInFrame, SSliceArgument* pSliceArg);
-bool_t CheckRowMbMultiSliceSetting (const int32_t kiMbWidth,  SSliceArgument* pSliceArg);
+bool CheckFixedSliceNumMultiSliceSetting (const int32_t kiMbNumInFrame,  SSliceArgument* pSliceArg);
+bool CheckRasterMultiSliceSetting (const int32_t kiMbNumInFrame, SSliceArgument* pSliceArg);
+bool CheckRowMbMultiSliceSetting (const int32_t kiMbWidth,  SSliceArgument* pSliceArg);
 
 void GomValidCheckSliceNum (const int32_t kiMbWidth, const int32_t kiMbHeight, int32_t* pSliceNum);
 void GomValidCheckSliceMbNum (const int32_t kiMbWidth, const int32_t kiMbHeight,  SSliceArgument* pSliceArg);
--- a/codec/encoder/core/inc/svc_encode_mb.h
+++ b/codec/encoder/core/inc/svc_encode_mb.h
@@ -57,8 +57,8 @@
 void    WelsEncRecUV (SWelsFuncPtrList* func, SMB* pCurMb, SMbCache* pMbCache, int16_t* pRs, int32_t iUV);
 void    WelsRecPskip (SDqLayer* pCurDq, SWelsFuncPtrList* pFunc, SMB* pCurMb, SMbCache* pMbCache);
 
-BOOL_T	WelsTryPYskip (sWelsEncCtx* pEncCtx, SMB* pCurMb, SMbCache* pMbCache);
-BOOL_T    WelsTryPUVskip (sWelsEncCtx* pEncCtx, SMB* pCurMb, SMbCache* pMbCache, int32_t iUV);
+bool	WelsTryPYskip (sWelsEncCtx* pEncCtx, SMB* pCurMb, SMbCache* pMbCache);
+bool    WelsTryPUVskip (sWelsEncCtx* pEncCtx, SMB* pCurMb, SMbCache* pMbCache, int32_t iUV);
 }
 #endif
 
--- a/codec/encoder/core/inc/svc_encode_slice.h
+++ b/codec/encoder/core/inc/svc_encode_slice.h
@@ -72,8 +72,8 @@
 
 //===================MB-level encode====================//
 //encapsulation func: store base rec, highest Dependency Layer(only one quality) rec, single layer rec
-void WelsPSliceMdEnc (sWelsEncCtx* pEncCtx, SSlice* pSlice,  const bool_t kbIsHighestDlayerFlag);
-void WelsPSliceMdEncDynamic (sWelsEncCtx* pEncCtx, SSlice* pSlice,  const bool_t kbIsHighestDlayerFlag);
+void WelsPSliceMdEnc (sWelsEncCtx* pEncCtx, SSlice* pSlice,  const bool kbIsHighestDlayerFlag);
+void WelsPSliceMdEncDynamic (sWelsEncCtx* pEncCtx, SSlice* pSlice,  const bool kbIsHighestDlayerFlag);
 
 //encapsulation func: store base rec, highest Dependency Layer(only one quality) rec, single layer rec
 void WelsISliceMdEnc (sWelsEncCtx* pEncCtx, SSlice* pSlice);	// for intra non-dynamic slice
@@ -83,7 +83,7 @@
 void WelsCodePOverDynamicSlice (sWelsEncCtx* pEncCtx, SSlice* pSlice);
 
 void WelsCodeOneSlice (sWelsEncCtx* pEncCtx, const int32_t kiSliceIdx,
-                       const int32_t/*EWelsNalUnitType*/ keNalType/*, bool_t bNewLayer*/);
+                       const int32_t/*EWelsNalUnitType*/ keNalType/*, bool bNewLayer*/);
 
 void WelsInitSliceEncodingFuncs (uint32_t uiCpuFlag);
 
@@ -99,7 +99,7 @@
                                         const int32_t kiSliceFirstMbXY);	// for inter dynamic slice
 
 
-BOOL_T DynSlcJudgeSliceBoundaryStepBack (void* pEncCtx, void* pSlice, SSliceCtx* pSliceCtx, SMB* pCurMb,
+bool DynSlcJudgeSliceBoundaryStepBack (void* pEncCtx, void* pSlice, SSliceCtx* pSliceCtx, SMB* pCurMb,
     SDynamicSlicingStack* pDss);
 }
 #endif //SVC_ENCODE_SLICE_H__
--- a/codec/encoder/core/inc/svc_motion_estimate.h
+++ b/codec/encoder/core/inc/svc_motion_estimate.h
@@ -127,7 +127,7 @@
 void WelsMotionEstimateIterativeSearch (SWelsFuncPtrList* pFuncList, SWelsME* pMe, const int32_t kiStrideEnc,
                                         const int32_t kiStrideRef, uint8_t* pRef);
 
-bool_t WelsMeSadCostSelect (int32_t* pSadCost, const uint16_t* kpMvdCost, int32_t* pBestCost, const int32_t kiDx,
+bool WelsMeSadCostSelect (int32_t* pSadCost, const uint16_t* kpMvdCost, int32_t* pBestCost, const int32_t kiDx,
                             const int32_t kiDy, int32_t* pIx, int32_t* pIy);
 
 }
--- a/codec/encoder/core/inc/utils.h
+++ b/codec/encoder/core/inc/utils.h
@@ -65,7 +65,7 @@
  *	Function pointer declaration for various tool sets
  */
 // wels log output
-typedef void (*PWelsLogCallbackFunc) (void* pCtx, const int32_t iLevel, const str_t* kpFmt, va_list argv);
+typedef void (*PWelsLogCallbackFunc) (void* pCtx, const int32_t iLevel, const char* kpFmt, va_list argv);
 
 // wels psnr calc
 typedef float (*PWelsPsnrFunc) (const void* kpTarPic,
@@ -78,13 +78,13 @@
 extern PWelsLogCallbackFunc	wlog;
 
 #ifdef __GNUC__
-extern void WelsLog (void* pCtx, int32_t iLevel, const str_t* kpFmt, ...) __attribute__ ((__format__ (__printf__, 3,
+extern void WelsLog (void* pCtx, int32_t iLevel, const char* kpFmt, ...) __attribute__ ((__format__ (__printf__, 3,
     4)));
 #else
-extern void WelsLog (void* pCtx, int32_t iLevel, const str_t* kpFmt, ...);
+extern void WelsLog (void* pCtx, int32_t iLevel, const char* kpFmt, ...);
 #endif
 
-extern const str_t* g_sWelsLogTags[];
+extern const char* g_sWelsLogTags[];
 
 /*!
  *************************************************************************************
@@ -100,8 +100,8 @@
  * \note	N/A
  *************************************************************************************
  */
-void WelsLogDefault (void* pCtx, const int32_t kiLevel, const str_t* kpFmtStr, va_list argv);
-void WelsLogNil (void* pCtx, const int32_t kiLevel, const str_t* kpFmtStr, va_list argv);
+void WelsLogDefault (void* pCtx, const int32_t kiLevel, const char* kpFmtStr, va_list argv);
+void WelsLogNil (void* pCtx, const int32_t kiLevel, const char* kpFmtStr, va_list argv);
 
 
 /*!
@@ -155,7 +155,7 @@
 * \note	N/A
 *************************************************************************************
 */
-void WelsReopenTraceFile (void* pCtx, str_t* pCurPath);
+void WelsReopenTraceFile (void* pCtx, char* pCurPath);
 
 /*
  *	PSNR calculation routines
--- a/codec/encoder/core/inc/wels_common_basis.h
+++ b/codec/encoder/core/inc/wels_common_basis.h
@@ -199,7 +199,7 @@
 typedef struct TagParaSetOffsetVariable {
 int32_t 	iParaSetIdDelta[MAX_DQ_LAYER_NUM/*+1*/];	//mark delta between SPS_ID_in_bs and sps_id_in_encoder, can be minus, for each dq-layer
 //need not extra +1 due no MGS and FMO case so far
-bool_t		bUsedParaSetIdInBs[MAX_PPS_COUNT];	//mark the used SPS_ID with 1
+bool		bUsedParaSetIdInBs[MAX_PPS_COUNT];	//mark the used SPS_ID with 1
 uint32_t	uiNextParaSetIdToUseInBs;					//mark the next SPS_ID_in_bs, for all layers
 } SParaSetOffsetVariable;
 
@@ -208,12 +208,12 @@
 SParaSetOffsetVariable
 sParaSetOffsetVariable[PARA_SET_TYPE]; //PARA_SET_TYPE=3; paraset_type = 0: AVC_SPS; =1: Subset_SPS; =2: PPS
 //in PSO design, "bPpsIdMappingIntoSubsetsps" uses the current para of current IDR period
-bool_t
+bool
 bPpsIdMappingIntoSubsetsps[MAX_DQ_LAYER_NUM/*+1*/];	// need not extra +1 due no MGS and FMO case so far
 uint16_t
 uiIdrPicId;		// IDR picture id: [0, 65535], this one is used for LTR!! Can we just NOT put this into the SParaSetOffset structure?!!
 #if _DEBUG
-bool_t                  bEnableSpsPpsIdAddition;
+bool                  bEnableSpsPpsIdAddition;
 #endif
 } SParaSetOffset;
 
@@ -311,7 +311,7 @@
 #define MB_TYPE_UNAVAILABLE		0xFF000000
 #define REF_NOT_AVAIL    -2
 #define REF_NOT_IN_LIST -1    //intra
-#define	REF_PIC_REORDER_DEFAULT	TRUE
+#define	REF_PIC_REORDER_DEFAULT	true
 
 #define IS_INTRA4x4(type) ( MB_TYPE_INTRA4x4 == (type) )
 #define IS_INTRA16x16(type) ( MB_TYPE_INTRA16x16 == (type) )
--- a/codec/encoder/core/inc/wels_const.h
+++ b/codec/encoder/core/inc/wels_const.h
@@ -44,7 +44,7 @@
 
 // Miscellaneous sizing infos
 #ifndef MAX_FNAME_LEN
-#define MAX_FNAME_LEN		256	// maximal length of file name in str_t size
+#define MAX_FNAME_LEN		256	// maximal length of file name in char size
 #endif//MAX_FNAME_LEN
 
 #ifndef WELS_LOG_BUF_SIZE
--- a/codec/encoder/core/inc/wels_func_ptr_def.h
+++ b/codec/encoder/core/inc/wels_func_ptr_def.h
@@ -110,7 +110,7 @@
 
 typedef int32_t (*PIntraFineMdFunc) (void* pEncCtx, void* pWelsMd, SMB* pCurMb, SMbCache* pMbCache);
 typedef void (*PInterFineMdFunc) (void* pEncCtx, void* pWelsMd, SSlice* slice, SMB* pCurMb, int32_t bestCost);
-typedef BOOL_T (*PInterMdFirstIntraModeFunc) (void* pEncCtx, void* pWelsMd, SMB* pCurMb, SMbCache* pMbCache);
+typedef bool (*PInterMdFirstIntraModeFunc) (void* pEncCtx, void* pWelsMd, SMB* pCurMb, SMbCache* pMbCache);
 
 typedef void (*PMotionSearchFunc) (SWelsFuncPtrList* pFuncList, void* pCurDqLayer, void* pMe,
                                    void* pSlice);  // here after reset all function pointers, will set as right parameter type
@@ -117,12 +117,12 @@
 typedef void (*PFillInterNeighborCacheFunc) (SMbCache* pMbCache, SMB* pCurMb, int32_t iMbWidth, int8_t* pVaaBgMbFlag);
 typedef void (*PAccumulateSadFunc) (uint32_t* pSumDiff, int32_t* pGomForegroundBlockNum, int32_t* iSad8x8,
                                     int8_t* pVaaBgMbFlag);//for RC
-typedef BOOL_T (*PDynamicSlicingStepBackFunc) (void* pEncCtx, void* pSlice, SSliceCtx* pSliceCtx, SMB* pCurMb,
+typedef bool (*PDynamicSlicingStepBackFunc) (void* pEncCtx, void* pSlice, SSliceCtx* pSliceCtx, SMB* pCurMb,
     SDynamicSlicingStack* pDynamicSlicingStack); // 2010.8.17
 
-typedef bool_t (*PInterMdBackgroundDecisionFunc) (void* pEncCtx, void* pWelsMd, SSlice* slice, SMB* pCurMb,
-    SMbCache* pMbCache, BOOL_T* pKeepPskip);
-typedef void (*PInterMdBackgroundInfoUpdateFunc) (SDqLayer* pCurLayer,  SMB* pCurMb, const bool_t bFlag,
+typedef bool (*PInterMdBackgroundDecisionFunc) (void* pEncCtx, void* pWelsMd, SSlice* slice, SMB* pCurMb,
+    SMbCache* pMbCache, bool* pKeepPskip);
+typedef void (*PInterMdBackgroundInfoUpdateFunc) (SDqLayer* pCurLayer,  SMB* pCurMb, const bool bFlag,
     const int32_t kiRefPictureType);
 
 typedef void (*PInterMdFunc) (void* pEncCtx, void* pWelsMd, SSlice* slice, SMB* pCurMb, SMbCache* pMbCache);
--- a/codec/encoder/core/inc/wels_preprocess.h
+++ b/codec/encoder/core/inc/wels_preprocess.h
@@ -79,8 +79,8 @@
   uint8_t         uiValidLongTermPicIdx;
   uint8_t         uiMarkLongTermPicIdx;
 
-  bool_t          bSceneChangeFlag;
-  bool_t          bIdrPeriodFlag;
+  bool          bSceneChangeFlag;
+  bool          bIdrPeriodFlag;
 } SVAAFrameInfo;
 
 class CWelsLib {
@@ -92,7 +92,7 @@
   int32_t DestroyIface (void* pEncCtx);
 
  protected:
-  void* QueryFunction (const str_t* pName);
+  void* QueryFunction (const char* pName);
 
  private:
   void* m_pVpLib;
@@ -119,16 +119,16 @@
   int32_t MultiLayerPreprocess (void* pEncCtx, const SSourcePicture** kppSrcPicList, const int32_t kiSpatialNum);
 
   void	BilateralDenoising (SPicture* pSrc, const int32_t iWidth, const int32_t iHeight);
-  bool_t  DetectSceneChange (SPicture* pCurPicture, SPicture* pRefPicture);
+  bool  DetectSceneChange (SPicture* pCurPicture, SPicture* pRefPicture);
   int32_t DownsamplePadding (SPicture* pSrc, SPicture* pDstPic,  int32_t iSrcWidth, int32_t iSrcHeight,
                              int32_t iShrinkWidth, int32_t iShrinkHeight, int32_t iTargetWidth, int32_t iTargetHeight);
 
-  void    VaaCalculation (SVAAFrameInfo* pVaaInfo, SPicture* pCurPicture, SPicture* pRefPicture, bool_t bCalculateSQDiff,
-                          bool_t bCalculateVar, bool_t bCalculateBGD);
-  void    BackgroundDetection (SVAAFrameInfo* pVaaInfo, SPicture* pCurPicture, SPicture* pRefPicture, bool_t bDetectFlag);
+  void    VaaCalculation (SVAAFrameInfo* pVaaInfo, SPicture* pCurPicture, SPicture* pRefPicture, bool bCalculateSQDiff,
+                          bool bCalculateVar, bool bCalculateBGD);
+  void    BackgroundDetection (SVAAFrameInfo* pVaaInfo, SPicture* pCurPicture, SPicture* pRefPicture, bool bDetectFlag);
   void    AdaptiveQuantCalculation (SVAAFrameInfo* pVaaInfo, SPicture* pCurPicture, SPicture* pRefPicture);
   void    AnalyzePictureComplexity (void* pCtx, SPicture* pCurPicture, SPicture* pRefPicture,
-                                    const int32_t kiDependencyId, const bool_t kbCalculateBGD);
+                                    const int32_t kiDependencyId, const bool kbCalculateBGD);
   void    Padding (uint8_t* pSrcY, uint8_t* pSrcU, uint8_t* pSrcV, int32_t iStrideY, int32_t iStrideUV,
                    int32_t iActualWidth, int32_t iPaddingWidth, int32_t iActualHeight, int32_t iPaddingHeight);
   void    SetRefMbType (void* pCtx, uint32_t** pRefMbTypeArray, int32_t iRefPicType);
@@ -144,8 +144,8 @@
   IWelsVP*         m_pInterfaceVp;
   CWelsLib*        m_pEncLib;
   void*            m_pEncCtx;
-  bool_t          m_bInitDone;
-  bool_t          m_bOfficialBranch;
+  bool          m_bInitDone;
+  bool          m_bOfficialBranch;
 };
 
 }
--- a/codec/encoder/core/src/au_set.cpp
+++ b/codec/encoder/core/src/au_set.cpp
@@ -262,7 +262,7 @@
 int32_t WelsWritePpsSyntax (SWelsPPS* pPps, SBitStringAux* pBitStringAux, SParaSetOffset* sPSOVector) {
   SBitStringAux* pLocalBitStringAux = pBitStringAux;
 
-  bool_t bUsedSubset    =  sPSOVector->bPpsIdMappingIntoSubsetsps[pPps->iPpsId];
+  bool bUsedSubset    =  sPSOVector->bPpsIdMappingIntoSubsetsps[pPps->iPpsId];
   int32_t iParameterSetType = (bUsedSubset ? PARA_SET_TYPE_SUBSETSPS : PARA_SET_TYPE_AVCSPS);
 
   BsWriteUE (pLocalBitStringAux, pPps->iPpsId +
@@ -348,7 +348,7 @@
   return 0;
 }
 
-static inline bool_t WelsGetPaddingOffset (int32_t iActualWidth, int32_t iActualHeight,  int32_t iWidth,
+static inline bool WelsGetPaddingOffset (int32_t iActualWidth, int32_t iActualHeight,  int32_t iWidth,
     int32_t iHeight, SCropOffset& pOffset) {
   if ((iWidth < iActualWidth) || (iHeight < iActualHeight))
     return false;
@@ -367,7 +367,7 @@
 
 int32_t WelsInitSps (SWelsSPS* pSps, SDLayerParam* pLayerParam, const uint32_t kuiIntraPeriod,
                      const int32_t kiNumRefFrame,
-                     const uint32_t kuiSpsId, const bool_t kbEnableFrameCropping, bool_t bEnableRc) {
+                     const uint32_t kuiSpsId, const bool kbEnableFrameCropping, bool bEnableRc) {
   memset (pSps, 0, sizeof (SWelsSPS));
 
   pSps->uiSpsId		= kuiSpsId;
@@ -409,7 +409,7 @@
 
 int32_t WelsInitSubsetSps (SSubsetSps* pSubsetSps, SDLayerParam* pLayerParam, const uint32_t kuiIntraPeriod,
                            const int32_t kiNumRefFrame,
-                           const uint32_t kuiSpsId, const bool_t kbEnableFrameCropping, bool_t bEnableRc) {
+                           const uint32_t kuiSpsId, const bool kbEnableFrameCropping, bool bEnableRc) {
   SWelsSPS* pSps = &pSubsetSps->pSps;
 
   memset (pSubsetSps, 0, sizeof (SSubsetSps));
@@ -431,8 +431,8 @@
                      SWelsSPS* pSps,
                      SSubsetSps* pSubsetSps,
                      const uint32_t kuiPpsId,
-                     const bool_t kbDeblockingFilterPresentFlag,
-                     const bool_t kbUsingSubsetSps) {
+                     const bool kbDeblockingFilterPresentFlag,
+                     const bool kbUsingSubsetSps) {
   SWelsSPS* pUsedSps = NULL;
   if (pPps == NULL || (pSps == NULL && pSubsetSps == NULL))
     return 1;
--- a/codec/encoder/core/src/deblocking.cpp
+++ b/codec/encoder/core/src/deblocking.cpp
@@ -395,8 +395,8 @@
   int32_t iMbX = pCurMb->iMbX;
   int32_t iMbY = pCurMb->iMbY;
 
-  BOOL_T bLeftBsValid[2] = { (iMbX > 0), ((iMbX > 0) && (pCurMb->uiSliceIdc == (pCurMb - 1)->uiSliceIdc))};
-  BOOL_T bTopBsValid[2]  = { (iMbY > 0), ((iMbY > 0) && (pCurMb->uiSliceIdc == (pCurMb - iMbStride)->uiSliceIdc))};
+  bool bLeftBsValid[2] = { (iMbX > 0), ((iMbX > 0) && (pCurMb->uiSliceIdc == (pCurMb - 1)->uiSliceIdc))};
+  bool bTopBsValid[2]  = { (iMbY > 0), ((iMbY > 0) && (pCurMb->uiSliceIdc == (pCurMb - iMbStride)->uiSliceIdc))};
 
   int32_t iLeftFlag = bLeftBsValid[pFilter->uiFilterIdc];
   int32_t iTopFlag  = bTopBsValid[pFilter->uiFilterIdc];
@@ -481,8 +481,8 @@
   int32_t iMbX = pCurMb->iMbX;
   int32_t iMbY = pCurMb->iMbY;
 
-  BOOL_T bLeftBsValid[2] = { (iMbX > 0), ((iMbX > 0) && (pCurMb->uiSliceIdc == (pCurMb - 1)->uiSliceIdc))};
-  BOOL_T bTopBsValid[2]  = { (iMbY > 0), ((iMbY > 0) && (pCurMb->uiSliceIdc == (pCurMb - iMbStride)->uiSliceIdc))};
+  bool bLeftBsValid[2] = { (iMbX > 0), ((iMbX > 0) && (pCurMb->uiSliceIdc == (pCurMb - 1)->uiSliceIdc))};
+  bool bTopBsValid[2]  = { (iMbY > 0), ((iMbY > 0) && (pCurMb->uiSliceIdc == (pCurMb - iMbStride)->uiSliceIdc))};
 
   int32_t iLeftFlag = bLeftBsValid[pFilter->uiFilterIdc];
   int32_t iTopFlag  = bTopBsValid[pFilter->uiFilterIdc];
@@ -536,8 +536,8 @@
   int32_t iMbX = pCurMb->iMbX;
   int32_t iMbY = pCurMb->iMbY;
 
-  BOOL_T bLeftBsValid[2] = { (iMbX > 0), ((iMbX > 0) && (pCurMb->uiSliceIdc == (pCurMb - 1)->uiSliceIdc))};
-  BOOL_T bTopBsValid[2]  = { (iMbY > 0), ((iMbY > 0) && (pCurMb->uiSliceIdc == (pCurMb - iMbStride)->uiSliceIdc))};
+  bool bLeftBsValid[2] = { (iMbX > 0), ((iMbX > 0) && (pCurMb->uiSliceIdc == (pCurMb - 1)->uiSliceIdc))};
+  bool bTopBsValid[2]  = { (iMbY > 0), ((iMbY > 0) && (pCurMb->uiSliceIdc == (pCurMb - iMbStride)->uiSliceIdc))};
 
   int32_t iLeftFlag = bLeftBsValid[pFilter->uiFilterIdc];
   int32_t iTopFlag  = bTopBsValid[pFilter->uiFilterIdc];
@@ -592,8 +592,8 @@
   int32_t iMbX = pCurMb->iMbX;
   int32_t iMbY = pCurMb->iMbY;
 
-  BOOL_T bLeftBsValid[2] = { (iMbX > 0), ((iMbX > 0) && (pCurMb->uiSliceIdc == (pCurMb - 1)->uiSliceIdc))};
-  BOOL_T bTopBsValid[2]  = { (iMbY > 0), ((iMbY > 0) && (pCurMb->uiSliceIdc == (pCurMb - iMbStride)->uiSliceIdc))};
+  bool bLeftBsValid[2] = { (iMbX > 0), ((iMbX > 0) && (pCurMb->uiSliceIdc == (pCurMb - 1)->uiSliceIdc))};
+  bool bTopBsValid[2]  = { (iMbY > 0), ((iMbY > 0) && (pCurMb->uiSliceIdc == (pCurMb - iMbStride)->uiSliceIdc))};
 
   int32_t iLeftFlag = bLeftBsValid[pFilter->uiFilterIdc];
   int32_t iTopFlag  = bTopBsValid[pFilter->uiFilterIdc];
--- a/codec/encoder/core/src/encoder.cpp
+++ b/codec/encoder/core/src/encoder.cpp
@@ -135,7 +135,7 @@
 }
 
 
-void WelsInitBGDFunc (SWelsFuncPtrList* pFuncList, const bool_t kbEnableBackgroundDetection) {
+void WelsInitBGDFunc (SWelsFuncPtrList* pFuncList, const bool kbEnableBackgroundDetection) {
   if (kbEnableBackgroundDetection) {
     pFuncList->pfInterMdBackgroundDecision = WelsMdInterJudgeBGDPskip;
     pFuncList->pfInterMdBackgroundInfoUpdate = WelsMdInterUpdateBGDInfo;
@@ -283,7 +283,7 @@
 EFrameType DecideFrameType (sWelsEncCtx* pEncCtx, const int8_t kiSpatialNum) {
   SWelsSvcCodingParam* pSvcParam	= pEncCtx->pSvcParam;
   EFrameType iFrameType = WELS_FRAME_TYPE_AUTO;
-  bool_t bSceneChangeFlag = false;
+  bool bSceneChangeFlag = false;
 
   // perform scene change detection
   if ((!pSvcParam->bEnableSceneChangeDetect) || pEncCtx->pVaa->bIdrPeriodFlag ||
@@ -314,9 +314,9 @@
  * \brief	Dump reconstruction for dependency layer
  */
 
-extern "C" void DumpDependencyRec (SPicture* pCurPicture, const str_t* kpFileName, const int8_t kiDid) {
+extern "C" void DumpDependencyRec (SPicture* pCurPicture, const char* kpFileName, const int8_t kiDid) {
   WelsFileHandle* pDumpRecFile = NULL;
-  static bool_t bDependencyRecFlag[MAX_DEPENDENCY_LAYER]	= {0};
+  static bool bDependencyRecFlag[MAX_DEPENDENCY_LAYER]	= {0};
   int32_t iWrittenSize											= 0;
 
   if (NULL == pCurPicture || NULL == kpFileName || kiDid >= MAX_DEPENDENCY_LAYER)
@@ -326,7 +326,7 @@
     if (strlen (kpFileName) > 0)	// confirmed_safe_unsafe_usage
       pDumpRecFile = WelsFopen (kpFileName, "ab");
     else {
-      str_t sDependencyRecFileName[16] = {0};
+      char sDependencyRecFileName[16] = {0};
       WelsSnprintf (sDependencyRecFileName, 16, "rec%d.yuv", kiDid);	// confirmed_safe_unsafe_usage
       pDumpRecFile	= WelsFopen (sDependencyRecFileName, "ab");
     }
@@ -336,7 +336,7 @@
     if (strlen (kpFileName) > 0) {	// confirmed_safe_unsafe_usage
       pDumpRecFile	= WelsFopen (kpFileName, "wb");
     } else {
-      str_t sDependencyRecFileName[16] = {0};
+      char sDependencyRecFileName[16] = {0};
       WelsSnprintf (sDependencyRecFileName, 16, "rec%d.yuv", kiDid);	// confirmed_safe_unsafe_usage
       pDumpRecFile	= WelsFopen (sDependencyRecFileName, "wb");
     }
@@ -382,9 +382,9 @@
  * \brief	Dump the reconstruction pictures
  */
 
-void DumpRecFrame (SPicture* pCurPicture, const str_t* kpFileName) {
+void DumpRecFrame (SPicture* pCurPicture, const char* kpFileName) {
   WelsFileHandle* pDumpRecFile				= NULL;
-  static bool_t bRecFlag	= false;
+  static bool bRecFlag	= false;
   int32_t iWrittenSize			= 0;
 
   if (NULL == pCurPicture || NULL == kpFileName)
--- a/codec/encoder/core/src/encoder_data_tables.cpp
+++ b/codec/encoder/core/src/encoder_data_tables.cpp
@@ -86,7 +86,7 @@
 
 // extern at mb_cache.h
 
-const str_t* g_sWelsLogTags[] = {
+const char* g_sWelsLogTags[] = {
   "ERR",
   "WARN",
   "INFO",
--- a/codec/encoder/core/src/encoder_ext.cpp
+++ b/codec/encoder/core/src/encoder_ext.cpp
@@ -636,10 +636,10 @@
         &pEnc->pRefIndexBlock4x4[MB_BLOCK8x8_NUM * kiOffset]);
 
   for (iIdx = 0; iIdx < iMbNum; iIdx++) {
-    BOOL_T     bLeft;
-    BOOL_T     bTop;
-    BOOL_T     bLeftTop;
-    BOOL_T     bRightTop;
+    bool     bLeft;
+    bool     bTop;
+    bool     bLeftTop;
+    bool     bRightTop;
     int32_t  iLeftXY, iTopXY, iLeftTopXY, iRightTopXY;
     uint8_t  uiSliceIdc;
 
@@ -740,7 +740,7 @@
   WELS_VERIFY_RETURN_IF (1, (NULL == pMbCache->pMemPredBlk4));
   pMbCache->pBufferInterPredMe = (uint8_t*)pMa->WelsMalloc (4 * 640 * sizeof (uint8_t), "pMbCache->pBufferInterPredMe");
   WELS_VERIFY_RETURN_IF (1, (NULL == pMbCache->pBufferInterPredMe));
-  pMbCache->pPrevIntra4x4PredModeFlag = (bool_t*)pMa->WelsMalloc (16 * sizeof (bool_t),
+  pMbCache->pPrevIntra4x4PredModeFlag = (bool*)pMa->WelsMalloc (16 * sizeof (bool),
                                         "pMbCache->pPrevIntra4x4PredModeFlag");
   WELS_VERIFY_RETURN_IF (1, (NULL == pMbCache->pPrevIntra4x4PredModeFlag));
   pMbCache->pRemIntra4x4PredModeFlag	= (int8_t*)pMa->WelsMalloc (16 * sizeof (int8_t),
@@ -1000,7 +1000,7 @@
   iDlayerIndex	= 0;
   while (iDlayerIndex < iDlayerCount) {
     SDqIdc* pDqIdc		= & (*ppCtx)->pDqIdcMap[iDlayerIndex];
-    const bool_t bUseSubsetSps			= (iDlayerIndex > BASE_DEPENDENCY_ID);
+    const bool bUseSubsetSps			= (iDlayerIndex > BASE_DEPENDENCY_ID);
     SDLayerParam* pDlayerParam	= &pParam->sDependencyLayers[iDlayerIndex];
 
     pDqIdc->uiSpatialId	= iDlayerIndex;
@@ -1120,7 +1120,7 @@
   // Adaptive size_cs, size_fdec by implementation dependency
   iTemporalIdx = 0;
   while (iTemporalIdx < iCntTid) {
-    const bool_t kbBaseTemporalFlag	= (iTemporalIdx == 0);
+    const bool kbBaseTemporalFlag	= (iTemporalIdx == 0);
 
     iSpatialIdx = 0;
     while (iSpatialIdx < kiNumSpatialLayers) {
@@ -1153,7 +1153,7 @@
 
   iTemporalIdx = 0;
   while (iTemporalIdx < iCntTid) {
-    const bool_t kbBaseTemporalFlag	= (iTemporalIdx == 0);
+    const bool kbBaseTemporalFlag	= (iTemporalIdx == 0);
 
     iSpatialIdx = 0;
     while (iSpatialIdx < iCountLayersNeedCs[kbBaseTemporalFlag]) {
@@ -1172,13 +1172,13 @@
   }
   iTemporalIdx = 0;
   while (iTemporalIdx < iCntTid) {
-    const bool_t kbBaseTemporalFlag	= (iTemporalIdx == 0);
+    const bool kbBaseTemporalFlag	= (iTemporalIdx == 0);
 
     iSpatialIdx = 0;
     while (iSpatialIdx < kiNumSpatialLayers) {
       int32_t iMatchIndex = 0;
-      bool_t bInMap = false;
-      bool_t bMatchFlag = false;
+      bool bInMap = false;
+      bool bMatchFlag = false;
 
       i = 0;
       while (i < iCountLayersNeedCs[kbBaseTemporalFlag]) {
@@ -1667,7 +1667,7 @@
       while (ilayer < pParam->iNumDependencyLayer) {
         SDqLayer* pDq	= pCtx->ppDqLayerList[ilayer];
         SDLayerParam* pDlp = &pCtx->pSvcParam->sDependencyLayers[ilayer];
-        const BOOL_T kbIsDynamicSlicing = (SM_DYN_SLICE == pDlp->sMso.uiSliceMode);
+        const bool kbIsDynamicSlicing = (SM_DYN_SLICE == pDlp->sMso.uiSliceMode);
 
         // pDq layers
         if (NULL != pDq) {
@@ -2082,7 +2082,7 @@
   // for logs
 #ifdef ENABLE_TRACE_FILE
   if (wlog == WelsLogDefault) {
-    str_t fname[MAX_FNAME_LEN] = {0};
+    char fname[MAX_FNAME_LEN] = {0};
 
     WelsSnprintf (fname, MAX_FNAME_LEN, "wels_svc_encoder_trace.txt");
 
@@ -2312,10 +2312,10 @@
     const int32_t kiMbXY				= pMb->iMbXY;
     const int32_t kiMbX				= pMb->iMbX;
     const int32_t kiMbY				= pMb->iMbY;
-    BOOL_T     bLeft;
-    BOOL_T     bTop;
-    BOOL_T     bLeftTop;
-    BOOL_T     bRightTop;
+    bool     bLeft;
+    bool     bTop;
+    bool     bLeftTop;
+    bool     bRightTop;
     int32_t  uiSliceIdc;
     int32_t   iLeftXY, iTopXY, iLeftTopXY, iRightTopXY;
 
@@ -2550,7 +2550,7 @@
   SSlice* pBaseSlice				= &pCurDq->sLayerInfo.pSliceInLayer[0];
   SSlice* pSlice					= NULL;
   const uint8_t kiCurDid			= pCtx->uiDependencyId;
-  const bool_t kbUseSubsetSpsFlag = (kiCurDid > BASE_DEPENDENCY_ID);
+  const bool kbUseSubsetSpsFlag = (kiCurDid > BASE_DEPENDENCY_ID);
   SDLayerParam* fDlp				= &pParam->sDependencyLayers[kiCurDid];
   SNalUnitHeaderExt* pNalHdExt	= &pCurDq->sLayerInfo.sNalHeaderExt;
   SNalUnitHeader* pNalHd			= &pNalHdExt->sNalHeader;
@@ -2638,7 +2638,7 @@
 
 void PreprocessSliceCoding (sWelsEncCtx* pCtx) {
   SDqLayer* pCurLayer		= pCtx->pCurDqLayer;
-  const bool_t kbBaseAvail	= pCurLayer->bBaseLayerAvailableFlag;
+  const bool kbBaseAvail	= pCurLayer->bBaseLayerAvailableFlag;
 
   /* function pointers conditional assignment under sWelsEncCtx, layer_mb_enc_rec (in stack) is exclusive */
 
@@ -2766,7 +2766,7 @@
 
   const int32_t kiEncId			= kiCurEncoderParaSetId;
   const uint32_t kuiPrevIdInBs	= sParaSetOffsetVariable->iParaSetIdDelta[kiEncId] + kiEncId;//mark current_id
-  const bool_t* kpUsedIdPointer   = &sParaSetOffsetVariable->bUsedParaSetIdInBs[0];
+  const bool* kpUsedIdPointer   = &sParaSetOffsetVariable->bUsedParaSetIdInBs[0];
   uint32_t uiNextIdInBs			= sParaSetOffsetVariable->uiNextParaSetIdToUseInBs;
 
 #if _DEBUG
@@ -2817,7 +2817,7 @@
   while (iIdx < pCtx->iSpsNum) {
     SDqIdc* pDqIdc		= &pCtx->pDqIdcMap[iIdx];
     const int32_t kiDid	= pDqIdc->uiSpatialId;
-    const bool_t kbUsingSubsetSps = (kiDid > BASE_DEPENDENCY_ID);
+    const bool kbUsingSubsetSps = (kiDid > BASE_DEPENDENCY_ID);
 
     iNal	= pCtx->pOut->iNalIndex;
 
@@ -3009,7 +3009,7 @@
   // uiSliceIdx: 0 1 2 3 4 5 6 7 8 9 10
   iCheckingIdx = 0;
   while (true) {
-    bool_t bMatchFlag = false;
+    bool bMatchFlag = false;
     iPartitionIdx = 0;
     while (iPartitionIdx < kiPartitionCnt) {
       const int32_t coded_slice_cnt = pCurDq->pNumSliceCodedOfPartition[iPartitionIdx];
@@ -3124,7 +3124,7 @@
   EWelsNalRefIdc eNalRefIdc			= NRI_PRI_LOWEST;
   int8_t iCurDid						= 0;
   int8_t iCurTid						= 0;
-  bool_t bAvcBased					= false;
+  bool bAvcBased					= false;
 #if defined(ENABLE_PSNR_CALC)
   float snr_y = .0f, snr_u = .0f, snr_v = .0f;
 #endif//ENABLE_PSNR_CALC
@@ -3359,7 +3359,7 @@
           pCtx->iActiveThreadsNum	= iSliceCount;
           // to fire slice coding threads
           err = FiredSliceThreads (&pCtx->pSliceThreading->pThreadPEncCtx[0], &pCtx->pSliceThreading->pReadySliceCodingEvent[0],
-                                   pLayerBsInfo, iSliceCount, pCtx->pCurDqLayer->pSliceEncCtx, FALSE);
+                                   pLayerBsInfo, iSliceCount, pCtx->pCurDqLayer->pSliceEncCtx, false);
           if (err) {
             WelsLog (pCtx, WELS_LOG_ERROR,
                      "[MT] WelsEncoderEncodeExt(), FiredSliceThreads return(%d) failed and exit encoding frame, iCountThreadsNum= %d, iSliceCount= %d, uiSliceMode= %d, iMultipleThreadIdc= %d!!\n",
@@ -3418,7 +3418,7 @@
           iNumThreadsRunning		= iNumThreadsScheduled;
           // to fire slice coding threads
           err = FiredSliceThreads (&pCtx->pSliceThreading->pThreadPEncCtx[0], &pCtx->pSliceThreading->pReadySliceCodingEvent[0],
-                                   pLayerBsInfo, iNumThreadsRunning, pCtx->pCurDqLayer->pSliceEncCtx, FALSE);
+                                   pLayerBsInfo, iNumThreadsRunning, pCtx->pCurDqLayer->pSliceEncCtx, false);
           if (err) {
             WelsLog (pCtx, WELS_LOG_ERROR,
                      "[MT] WelsEncoderEncodeExt(), FiredSliceThreads return(%d) failed and exit encoding frame, iCountThreadsNum= %d, iSliceCount= %d, uiSliceMode= %d, iMultipleThreadIdc= %d!!\n",
@@ -3510,7 +3510,7 @@
 
         // to fire slice coding threads
         err = FiredSliceThreads (&pCtx->pSliceThreading->pThreadPEncCtx[0], &pCtx->pSliceThreading->pReadySliceCodingEvent[0],
-                                 pLayerBsInfo, kiPartitionCnt, pCtx->pCurDqLayer->pSliceEncCtx, TRUE);
+                                 pLayerBsInfo, kiPartitionCnt, pCtx->pCurDqLayer->pSliceEncCtx, true);
         if (err) {
           WelsLog (pCtx, WELS_LOG_ERROR,
                    "[MT] WelsEncoderEncodeExt(), FiredSliceThreads return(%d) failed and exit encoding frame, iCountThreadsNum= %d, iSliceCount= %d, uiSliceMode= %d, iMultipleThreadIdc= %d!!\n",
@@ -3531,7 +3531,7 @@
       } else	// for non-dynamic-slicing mode single threading branch..
 #endif//MT_ENABLED
       {
-        const bool_t bNeedPrefix	= pCtx->bNeedPrefixNalFlag;
+        const bool bNeedPrefix	= pCtx->bNeedPrefixNalFlag;
         int32_t iSliceIdx			= 0;
 
         iSliceCount	= GetCurrentSliceNum (pCtx->pCurDqLayer->pSliceEncCtx);
@@ -3810,7 +3810,7 @@
   SWelsSvcCodingParam* pOldParam		= NULL;
   int32_t iReturn = 0;
   int8_t iIndexD = 0;
-  bool_t bNeedReset = false;
+  bool bNeedReset = false;
 
   if (NULL == ppCtx || NULL == *ppCtx || NULL == pNewParam)	return 1;
 
@@ -4006,7 +4006,7 @@
   int32_t iAnyMbLeftInPartition = iEndMbInPartition - iFirstMbInPartition;
   const EWelsNalUnitType keNalType	= pCtx->eNalType;
   const EWelsNalRefIdc keNalRefIdc	= pCtx->eNalPriority;
-  const bool_t kbNeedPrefix		= pCtx->bNeedPrefixNalFlag;
+  const bool kbNeedPrefix		= pCtx->bNeedPrefixNalFlag;
 
   //init
   {
--- a/codec/encoder/core/src/expand_pic.cpp
+++ b/codec/encoder/core/src/expand_pic.cpp
@@ -147,7 +147,7 @@
   pExpLuma (pPicY, pPic->iLineSize[0], kiWidthY, kiHeightY);
   if (kiWidthUV >= 16) {
     // fix coding picture size as 16x16
-    const bool_t kbChrAligned = /*(iWidthUV >= 16) && */ ((kiWidthUV & 0x0F) == 0);	// chroma planes: (16+iWidthUV) & 15
+    const bool kbChrAligned = /*(iWidthUV >= 16) && */ ((kiWidthUV & 0x0F) == 0);	// chroma planes: (16+iWidthUV) & 15
     pExpChrom[kbChrAligned] (pPicCb, pPic->iLineSize[1], kiWidthUV, kiHeightUV);
     pExpChrom[kbChrAligned] (pPicCr, pPic->iLineSize[2], kiWidthUV, kiHeightUV);
   } else {
--- a/codec/encoder/core/src/md.cpp
+++ b/codec/encoder/core/src/md.cpp
@@ -494,7 +494,7 @@
 #endif//X86_ASM
 }
 
-BOOL_T MdIntraAnalysisVaaInfo (sWelsEncCtx* pEncCtx, uint8_t* pEncMb) {
+bool MdIntraAnalysisVaaInfo (sWelsEncCtx* pEncCtx, uint8_t* pEncMb) {
 
   SDqLayer* pCurDqLayer	= pEncCtx->pCurDqLayer;
   const int32_t kiLineSize  = pCurDqLayer->iEncStride[0];
@@ -878,7 +878,7 @@
 }
 
 
-void PredictSadSkip (int8_t* pRefIndexCache, bool_t* pMbSkipCache, int32_t* pSadCostCache, int32_t uiRef,
+void PredictSadSkip (int8_t* pRefIndexCache, bool* pMbSkipCache, int32_t* pSadCostCache, int32_t uiRef,
                      int32_t* iSadPredSkip) {
   const int32_t kiRefB	= pRefIndexCache[1];//top g_uiCache12_8x8RefIdx[0] - 4
   int32_t iRefC			= pRefIndexCache[5];//top-right g_uiCache12_8x8RefIdx[0] - 2
--- a/codec/encoder/core/src/memory_align.cpp
+++ b/codec/encoder/core/src/memory_align.cpp
@@ -66,7 +66,7 @@
 #endif//MEMORY_CHECK
 }
 
-void* CMemoryAlign::WelsMallocz (const uint32_t kuiSize, const str_t* kpTag) {
+void* CMemoryAlign::WelsMallocz (const uint32_t kuiSize, const char* kpTag) {
   void* pPointer = WelsMalloc (kuiSize, kpTag);
   if (NULL == pPointer) {
     return NULL;
@@ -77,7 +77,7 @@
   return pPointer;
 }
 
-void* CMemoryAlign::WelsMalloc (const uint32_t kuiSize, const str_t* kpTag) {
+void* CMemoryAlign::WelsMalloc (const uint32_t kuiSize, const char* kpTag) {
   const int32_t kiSizeOfVoidPointer	= sizeof (void**);
   const int32_t kiSizeOfInt				= sizeof (int32_t);
   const int32_t kiAlignedBytes		= m_nCacheLineSize - 1;
@@ -114,7 +114,7 @@
   return pAlignedBuffer;
 }
 
-void CMemoryAlign::WelsFree (void* pPointer, const str_t* kpTag) {
+void CMemoryAlign::WelsFree (void* pPointer, const char* kpTag) {
   if (pPointer) {
 #ifdef MEMORY_MONITOR
     const int32_t kiMemoryLength = * ((int32_t*) ((uint8_t*)pPointer - sizeof (void**) - sizeof (
--- a/codec/encoder/core/src/nal_encap.cpp
+++ b/codec/encoder/core/src/nal_encap.cpp
@@ -222,7 +222,7 @@
  * \brief	write prefix nal
  */
 int32_t WelsWriteSVCPrefixNal (SBitStringAux* pBitStringAux, const int32_t kiNalRefIdc,
-                               const bool_t kbIdrFlag) {
+                               const bool kbIdrFlag) {
   if (0 < kiNalRefIdc) {
     BsWriteOneBit (pBitStringAux, false/*bStoreRefBasePicFlag*/);
     BsWriteOneBit (pBitStringAux, false);
--- a/codec/encoder/core/src/picture_handle.cpp
+++ b/codec/encoder/core/src/picture_handle.cpp
@@ -47,7 +47,7 @@
  * \pram	need_expand		need borders expanding
  * \return	successful if effective picture pointer returned, otherwise failed with NULL
  */
-SPicture* AllocPicture (CMemoryAlign* pMa, const int32_t kiWidth , const int32_t kiHeight, bool_t bNeedMbInfo) {
+SPicture* AllocPicture (CMemoryAlign* pMa, const int32_t kiWidth , const int32_t kiHeight, bool bNeedMbInfo) {
   SPicture* pPic = NULL;
   int32_t iPicWidth = 0;
   int32_t iPicHeight = 0;
--- a/codec/encoder/core/src/property.cpp
+++ b/codec/encoder/core/src/property.cpp
@@ -58,7 +58,7 @@
  * \param	iSize	size of pBuffer overall
  * \return	actual size of pBuffer used; 0 returned in failure
  */
-int32_t GetCodeName (str_t* pBuf, int32_t iSize) {
+int32_t GetCodeName (char* pBuf, int32_t iSize) {
   int32_t iLen = 0;
 
   if (NULL == pBuf)
@@ -79,7 +79,7 @@
  * \param	iSize	size of pBuffer overall
  * \return	actual size of pBuffer used; 0 returned in failure
  */
-int32_t GetLibName (str_t* pBuf, int32_t iSize) {
+int32_t GetLibName (char* pBuf, int32_t iSize) {
   int32_t iLen = 0;
 
   if (NULL == pBuf)
@@ -100,7 +100,7 @@
  * \param	iSize	size of pBuffer overall
  * \return	actual size of pBuffer used; 0 returned in failure
  */
-int32_t GetVerNum (str_t* pBuf, int32_t iSize) {
+int32_t GetVerNum (char* pBuf, int32_t iSize) {
   int32_t iLen = 0;
 
   if (NULL == pBuf)
@@ -121,7 +121,7 @@
  * \param	iSize	size of pBuffer overall
  * \return	actual size of pBuffer used; 0 returned in failure
  */
-int32_t GetIdentInfo (str_t* pBuf, int32_t iSize) {
+int32_t GetIdentInfo (char* pBuf, int32_t iSize) {
   int32_t iLen = 0;
 
   if (NULL == pBuf)
--- a/codec/encoder/core/src/ratectl.cpp
+++ b/codec/encoder/core/src/ratectl.cpp
@@ -108,7 +108,7 @@
   int32_t j = 0;
   int32_t iMbWidth = 0;
 
-  BOOL_T bMultiSliceMode = FALSE;
+  bool bMultiSliceMode = false;
   int32_t iGomRowMode0 = 1, iGomRowMode1 = 1;
 #ifdef _TEST_TEMP_RC_
   fp_test_rc = fopen ("testRC.dat", "w");
@@ -293,7 +293,7 @@
   RcInitVGop (pEncCtx);
 }
 
-bool_t RcJudgeBitrateFpsUpdate (sWelsEncCtx* pEncCtx) {
+bool RcJudgeBitrateFpsUpdate (sWelsEncCtx* pEncCtx) {
   int32_t iCurDid = pEncCtx->uiDependencyId;
   SWelsSvcRc* pWelsSvcRc       = &pEncCtx->pWelsSvcRc[iCurDid];
   SDLayerParam* pDLayerParam    = &pEncCtx->pSvcParam->sDependencyLayers[iCurDid];
--- a/codec/encoder/core/src/ref_list_mgr_svc.cpp
+++ b/codec/encoder/core/src/ref_list_mgr_svc.cpp
@@ -55,7 +55,7 @@
 *	reset LTR marking , recovery ,feedback state to default
 */
 void ResetLtrState (SLTRState* pLtr) {
-  pLtr->bReceivedT0LostFlag	= FALSE;
+  pLtr->bReceivedT0LostFlag	= false;
   pLtr->iLastRecoverFrameNum = 0;
   pLtr->iLastCorFrameNumDec = -1;
   pLtr->iCurFrameNumInDec = -1;
@@ -63,8 +63,8 @@
   // LTR mark
   pLtr->iLTRMarkMode = LTR_DIRECT_MARK;
   pLtr->iLTRMarkSuccessNum = 0; //successful marked num
-  pLtr->bLTRMarkingFlag = FALSE;	//decide whether current frame marked as LTR
-  pLtr->bLTRMarkEnable = FALSE; //when LTR is confirmed and the interval is no smaller than the marking period
+  pLtr->bLTRMarkingFlag = false;	//decide whether current frame marked as LTR
+  pLtr->bLTRMarkEnable = false; //when LTR is confirmed and the interval is no smaller than the marking period
   pLtr->iCurLtrIdx = 0;
   pLtr->iLastLtrIdx = 0;
   pLtr->uiLtrMarkInterval = 0;
@@ -165,7 +165,7 @@
                  pLongRefList[i]->iLongTermPicNum, pLongRefList[i]->iFrameNum);
         SetUnref (pLongRefList[i]);
         DeleteLTRFromLongList (pCtx, i);
-        pLtr->bLTRMarkEnable = TRUE;
+        pLtr->bLTRMarkEnable = true;
         if (pRefList->uiLongRefCount == 0) 	{
           pCtx->bEncCurFrmAsIdrFlag = true;
         }
@@ -178,7 +178,7 @@
                  pLongRefList[i]->iLongTermPicNum, pLongRefList[i]->iFrameNum);
         SetUnref (pLongRefList[i]);
         DeleteLTRFromLongList (pCtx, i);
-        pLtr->bLTRMarkEnable = TRUE;
+        pLtr->bLTRMarkEnable = true;
         if (pRefList->uiLongRefCount == 0) 	{
           pCtx->bEncCurFrmAsIdrFlag = true;
         }
@@ -221,7 +221,7 @@
         pLtr->iCurLtrIdx = (pLtr->iCurLtrIdx+1)%LONG_TERM_REF_NUM;
         pLtr->iLTRMarkMode = (pLtr->iLTRMarkSuccessNum >= (LONG_TERM_REF_NUM)) ? (LTR_DELAY_MARK) : (LTR_DIRECT_MARK);
         WelsLog (pCtx, WELS_LOG_WARNING, "LTR mark mode =%d", pLtr->iLTRMarkMode);
-        pLtr->bLTRMarkEnable = TRUE;
+        pLtr->bLTRMarkEnable = true;
         break;
       }
     }
@@ -235,7 +235,7 @@
       }
     }
     pLtr->uiLtrMarkState = NO_LTR_MARKING_FEEDBACK;
-    pLtr->bLTRMarkEnable = TRUE;
+    pLtr->bLTRMarkEnable = true;
 
     if (pLtr->iLTRMarkSuccessNum == 0) {
       pCtx->bEncCurFrmAsIdrFlag = true; // no LTR , means IDR recieve failed, force next frame IDR
@@ -254,7 +254,7 @@
   int32_t iMaxFrameNumPlus1 = (1 << pCtx->pSps->uiLog2MaxFrameNum);
   int32_t i = 0;
   int32_t j = 0;
-  bool_t bMoveLtrFromShortToLong = false;
+  bool bMoveLtrFromShortToLong = false;
 
   if (pCtx->eSliceType == I_SLICE)	{
     i = 0;
@@ -324,7 +324,7 @@
 /*
  *	update reference picture list
  */
-BOOL_T WelsUpdateRefList (sWelsEncCtx* pCtx) {
+bool WelsUpdateRefList (sWelsEncCtx* pCtx) {
   SRefList* pRefList		= pCtx->ppRefPicListExt[pCtx->uiDependencyId];
   SLTRState* pLtr			= &pCtx->pLtr[pCtx->uiDependencyId];
   SDLayerParam* pParamD	= &pCtx->pSvcParam->sDependencyLayers[pCtx->uiDependencyId];
@@ -339,10 +339,10 @@
   uint32_t i = 0;
   // Need update pRef list in case store base layer or target dependency layer construction
   if (NULL == pCtx->pCurDqLayer)
-    return FALSE;
+    return false;
 
   if (NULL == pRefList || NULL == pRefList->pRef[0] || NULL == pRefList->pRef[kiSwapIdx])
-    return FALSE;
+    return false;
 
   if (NULL != pCtx->pDecPic) {
 #if !defined(ENABLE_FRAME_DUMP)	// to save complexity, 1/6/2009
@@ -373,8 +373,8 @@
         DeleteInvalidLTR (pCtx);
         HandleLTRMarkFeedback (pCtx);
 
-        pLtr->bReceivedT0LostFlag = FALSE; // reset to false due to the recovery is finished
-        pLtr->bLTRMarkingFlag = FALSE;
+        pLtr->bReceivedT0LostFlag = false; // reset to false due to the recovery is finished
+        pLtr->bLTRMarkingFlag = false;
         ++pLtr->uiLtrMarkInterval;
       }
 
@@ -394,7 +394,7 @@
 
       pLtr->iCurLtrIdx = (pLtr->iCurLtrIdx+1)%LONG_TERM_REF_NUM;
       pLtr->iLTRMarkSuccessNum = 1; //IDR default suceess
-      pLtr->bLTRMarkEnable =  TRUE;
+      pLtr->bLTRMarkEnable =  true;
       pLtr->uiLtrMarkInterval = 0;
 
       pCtx->pVaa->uiValidLongTermPicIdx = 0;
@@ -402,10 +402,10 @@
     }
   }
   PrefetchNextBuffer (pCtx);
-  return TRUE;
+  return true;
 }
 
-bool_t CheckCurMarkFrameNumUsed (sWelsEncCtx* pCtx) {
+bool CheckCurMarkFrameNumUsed (sWelsEncCtx* pCtx) {
   SLTRState* pLtr = &pCtx->pLtr[pCtx->uiDependencyId];
   SRefList* pRefList	= pCtx->ppRefPicListExt[pCtx->uiDependencyId];
   SPicture** pLongRefList = pRefList->pLongRefList;
@@ -417,11 +417,11 @@
     if ((pCtx->iFrameNum == pLongRefList[i]->iFrameNum && pLtr->iLTRMarkMode == LTR_DIRECT_MARK) ||
         (CompareFrameNum (pCtx->iFrameNum + iGoPFrameNumInterval, pLongRefList[i]->iFrameNum,
                           iMaxFrameNumPlus1) == FRAME_NUM_EQUAL  && pLtr->iLTRMarkMode == LTR_DELAY_MARK)) {
-      return FALSE;
+      return false;
     }
   }
 
-  return TRUE;
+  return true;
 }
 void WelsMarkPic (sWelsEncCtx* pCtx) {
   SLTRState* pLtr = &pCtx->pLtr[pCtx->uiDependencyId];
@@ -432,12 +432,12 @@
   if (pCtx->pSvcParam->bEnableLongTermReference && pLtr->bLTRMarkEnable && pCtx->uiTemporalId == 0) {
     if (!pLtr->bReceivedT0LostFlag && pLtr->uiLtrMarkInterval > pCtx->pSvcParam->uiLtrMarkPeriod
         && CheckCurMarkFrameNumUsed (pCtx)) {
-      pLtr->bLTRMarkingFlag = TRUE;
-      pLtr->bLTRMarkEnable = FALSE;
+      pLtr->bLTRMarkingFlag = true;
+      pLtr->bLTRMarkEnable = false;
       pLtr->uiLtrMarkInterval = 0;
       pLtr->iLastLtrIdx = pLtr->iCurLtrIdx;
     } else {
-      pLtr->bLTRMarkingFlag = FALSE;
+      pLtr->bLTRMarkingFlag = false;
     }
   }
 
@@ -478,10 +478,10 @@
     if (pRequest->uiFeedbackType == LTR_RECOVERY_REQUEST &&  pRequest->uiIDRPicId == pCtx->sPSOVector.uiIdrPicId) {
       if (pRequest->iLastCorrectFrameNum == -1) {
         pCtx->bEncCurFrmAsIdrFlag = true;
-        return TRUE;
+        return true;
       } else if (pRequest->iCurrentFrameNum == -1) {
         pLtr->bReceivedT0LostFlag = true;
-        return TRUE;
+        return true;
       } else if ((CompareFrameNum (pLtr->iLastRecoverFrameNum , pRequest->iLastCorrectFrameNum,
                                    iMaxFrameNumPlus1) & (FRAME_NUM_EQUAL | FRAME_NUM_SMALLER)) // t0 lost
                  || ((CompareFrameNum (pLtr->iLastRecoverFrameNum , pRequest->iCurrentFrameNum,
@@ -502,9 +502,9 @@
                , pRequest->uiFeedbackType, pRequest->uiIDRPicId, pRequest->iCurrentFrameNum, pRequest->iLastCorrectFrameNum);
     }
   } else if (!pCtx->pSvcParam->bEnableLongTermReference) {
-    pCtx->bEncCurFrmAsIdrFlag = TRUE;
+    pCtx->bEncCurFrmAsIdrFlag = true;
   }
-  return TRUE;
+  return true;
 }
 void FilterLTRMarkingFeedback (sWelsEncCtx* pCtx, SLTRMarkingFeedback* pLTRMarkingFeedback) {
   SLTRState* pLtr = &pCtx->pLtr[pCtx->uiDependencyId];
@@ -532,7 +532,7 @@
 /*
  *	build reference picture list
  */
-BOOL_T WelsBuildRefList (sWelsEncCtx* pCtx, const int32_t iPOC) {
+bool WelsBuildRefList (sWelsEncCtx* pCtx, const int32_t iPOC) {
   SRefList* pRefList		=  pCtx->ppRefPicListExt[pCtx->uiDependencyId];
   SLTRState* pLtr			= &pCtx->pLtr[pCtx->uiDependencyId];
   const int32_t kiNumRef	= pCtx->pSvcParam->iNumRefFrame;
@@ -576,7 +576,7 @@
 
   if (pCtx->iNumRef0 > kiNumRef)
     pCtx->iNumRef0 = kiNumRef;
-  return (pCtx->iNumRef0 > 0 || pCtx->eSliceType == I_SLICE) ? (TRUE) : (FALSE);
+  return (pCtx->iNumRef0 > 0 || pCtx->eSliceType == I_SLICE) ? (true) : (false);
 }
 
 /*
--- a/codec/encoder/core/src/slice_multi_threading.cpp
+++ b/codec/encoder/core/src/slice_multi_threading.cpp
@@ -81,10 +81,10 @@
     const int32_t kiMbXY				= pMb->iMbXY;
     const int32_t kiMbX				= pMb->iMbX;
     const int32_t kiMbY				= pMb->iMbY;
-    BOOL_T     bLeft;
-    BOOL_T     bTop;
-    BOOL_T     bLeftTop;
-    BOOL_T     bRightTop;
+    bool     bLeft;
+    bool     bTop;
+    bool     bLeftTop;
+    bool     bRightTop;
     int32_t   iLeftXY, iTopXY, iLeftTopXY, iRightTopXY;
 
     iLeftXY = kiMbXY - 1;
@@ -438,7 +438,7 @@
   iIdx = 0;
   while (iIdx < iThreadNum) {
 #if defined(__GNUC__) && !defined(_WIN32)	// for posix threading
-    str_t name[SEM_NAME_MAX] = {0};
+    char name[SEM_NAME_MAX] = {0};
     WELS_THREAD_ERROR_CODE err = 0;
 #endif//__GNUC__
     pSmt->pThreadPEncCtx[iIdx].pWelsPEncCtx	= (void*) (*ppCtx);
@@ -568,7 +568,7 @@
       WelsEventDestroy (&pSmt->pFinUpdateMbListEvent[iIdx]);
 #endif//DYNAMIC_SLICE_ASSIGN && TRY_SLICING_BALANCE
 #else
-    str_t ename[SEM_NAME_MAX] = {0};
+    char ename[SEM_NAME_MAX] = {0};
     // length of semaphore name should be system constrained at least on mac 10.7
     WelsSnprintf (ename, SEM_NAME_MAX, "sc%d%p", iIdx, (void*) (*ppCtx));
     WelsEventClose (pSmt->pSliceCodedEvent[iIdx], ename);
@@ -688,7 +688,7 @@
   SWelsSvcCodingParam* pCodingParam	= pCtx->pSvcParam;
   SDLayerParam* pDlp				= &pCodingParam->sDependencyLayers[pCtx->uiDependencyId];
   SWelsSliceBs* pSliceBs			= NULL;
-  const BOOL_T kbIsDynamicSlicingMode	= (pDlp->sMso.uiSliceMode == SM_DYN_SLICE);
+  const bool kbIsDynamicSlicingMode	= (pDlp->sMso.uiSliceMode == SM_DYN_SLICE);
   int32_t iLayerSize					= 0;
   int32_t iNalIdxBase				= pLbi->iNalCount;
   int32_t iSliceIdx					= 0;
@@ -897,7 +897,7 @@
   int32_t iSliceIdx							= -1;
   int32_t iThreadIdx							= -1;
   int32_t iEventIdx							= -1;
-  bool_t bNeedPrefix							= false;
+  bool bNeedPrefix							= false;
   EWelsNalUnitType eNalType						= NAL_UNIT_UNSPEC_0;
   EWelsNalRefIdc eNalRefIdc						= NRI_PRI_LOWEST;
 
@@ -946,7 +946,7 @@
 
       if (pParamD->sMso.uiSliceMode != SM_DYN_SLICE) {
         int64_t iSliceStart	= 0;
-        bool_t bDsaFlag = false;
+        bool bDsaFlag = false;
         iSliceIdx		= pPrivateData->iSliceIndex;
         pSlice			= &pCurDq->sLayerInfo.pSliceInLayer[iSliceIdx];
         pSliceBs		= &pEncPEncCtx->pSliceBs[iSliceIdx];
@@ -967,7 +967,7 @@
         InitBits (&pSliceBs->sBsWrite, pSliceBs->pBsBuffer, pSliceBs->uiSize);
 
 #if MT_DEBUG_BS_WR
-        pSliceBs->bSliceCodedFlag	= FALSE;
+        pSliceBs->bSliceCodedFlag	= false;
 #endif//MT_DEBUG_BS_WR
 
         if (bNeedPrefix) {
@@ -1041,7 +1041,7 @@
 #endif//SLICE_INFO_OUTPUT
 
 #if MT_DEBUG_BS_WR
-        pSliceBs->bSliceCodedFlag	= TRUE;
+        pSliceBs->bSliceCodedFlag	= true;
 #endif//MT_DEBUG_BS_WR
 
 #ifdef _WIN32
@@ -1219,7 +1219,7 @@
       if (dwAffinityMask & dwProcessAffinity) { // check if cpu is available
         dw = SetThreadAffinityMask (pCtx->pSliceThreading->pThreadHandles[iIdx], dwAffinityMask);  //1 << iIdx
         if (dw == 0) {
-          str_t str[64] = {0};
+          char str[64] = {0};
           WelsSnprintf (str, 64, "SetThreadAffinityMask iIdx:%d", iIdx);
         }
       }
@@ -1252,10 +1252,10 @@
 
 #ifdef _WIN32
 int32_t FiredSliceThreads (SSliceThreadPrivateData* pPriData, WELS_EVENT* pEventsList, SLayerBSInfo* pLbi,
-                           const uint32_t uiNumThreads, SSliceCtx* pSliceCtx, const BOOL_T bIsDynamicSlicingMode)
+                           const uint32_t uiNumThreads, SSliceCtx* pSliceCtx, const bool bIsDynamicSlicingMode)
 #else
 int32_t FiredSliceThreads (SSliceThreadPrivateData* pPriData, WELS_EVENT** pEventsList, SLayerBSInfo* pLbi,
-                           const uint32_t uiNumThreads, SSliceCtx* pSliceCtx, const BOOL_T bIsDynamicSlicingMode)
+                           const uint32_t uiNumThreads, SSliceCtx* pSliceCtx, const bool bIsDynamicSlicingMode)
 #endif//WIN32
 {
   int32_t iEndMbIdx	= 0;
@@ -1376,7 +1376,7 @@
   int32_t iNeedAdj = 1;
   // uiSliceMode of referencing spatial should be SM_FIXEDSLCNUM_SLICE
   // if using spatial base layer for complexity estimation
-  const BOOL_T kbModelingFromSpatial =	(pCtx->pCurDqLayer->pRefLayer != NULL && iCurDid > 0)
+  const bool kbModelingFromSpatial =	(pCtx->pCurDqLayer->pRefLayer != NULL && iCurDid > 0)
                                         && (pCtx->pSvcParam->sDependencyLayers[iCurDid - 1].sMso.uiSliceMode == SM_FIXEDSLCNUM_SLICE
                                             && pCtx->pSvcParam->iMultipleThreadIdc >= pCtx->pSvcParam->sDependencyLayers[iCurDid -
                                                 1].sMso.sSliceArgument.iSliceNum);
--- a/codec/encoder/core/src/svc_base_layer_md.cpp
+++ b/codec/encoder/core/src/svc_base_layer_md.cpp
@@ -446,7 +446,7 @@
   const uint8_t* kpAvailMode;
   int32_t i, j, iCoordinateX, iCoordinateY, iIdxStrideEnc, iIdxStrideDec;
   int32_t lambda[2]						= {iLambda << 2, iLambda};
-  bool_t* pPrevIntra4x4PredModeFlag	= pMbCache->pPrevIntra4x4PredModeFlag;
+  bool* pPrevIntra4x4PredModeFlag	= pMbCache->pPrevIntra4x4PredModeFlag;
   int8_t* pRemIntra4x4PredModeFlag		= pMbCache->pRemIntra4x4PredModeFlag;
   const uint8_t* kpIntra4x4AvailCount		= &g_kiIntra4AvailCount[0];
   const uint8_t* kpCache48CountScan4		= &g_kuiCache48CountScan4Idx[0];
@@ -578,7 +578,7 @@
   int32_t i, j, iCoordinateX, iCoordinateY, iIdxStrideEnc, iIdxStrideDec;
   int32_t iCostH, iCostV, iCostVR, iCostHD, iCostVL, iCostHU, iBestModeFake;
   int32_t lambda[2]						= {iLambda << 2, iLambda};
-  bool_t* pPrevIntra4x4PredModeFlag	= pMbCache->pPrevIntra4x4PredModeFlag;
+  bool* pPrevIntra4x4PredModeFlag	= pMbCache->pPrevIntra4x4PredModeFlag;
   int8_t* pRemIntra4x4PredModeFlag		= pMbCache->pRemIntra4x4PredModeFlag;
   const uint8_t* kpIntra4x4AvailCount		= &g_kiIntra4AvailCount[0];
   const uint8_t* kpCache48CountScan4		= &g_kuiCache48CountScan4Idx[0];
@@ -1235,7 +1235,7 @@
 }
 
 void WelsMdBackgroundMbEnc (void* pEnc, void* pMd, SMB* pCurMb, SMbCache* pMbCache, SSlice* pSlice,
-                            bool_t bSkipMbFlag) {
+                            bool bSkipMbFlag) {
   sWelsEncCtx* pEncCtx	= (sWelsEncCtx*)pEnc;
   SDqLayer* pCurDqLayer	= pEncCtx->pCurDqLayer;
   SWelsMD* pWelsMd		= (SWelsMD*)pMd;
@@ -1307,7 +1307,7 @@
   pFunc->pfCopy8x8Aligned (pMbCache->SPicData.pCsMb[2], pCurDqLayer->iCsStride[1], pMbCache->pMemPredChroma + 64, 8);
 }
 
-BOOL_T WelsMdPSkipEnc (void* pEnc, void* pMd, SMB* pCurMb, SMbCache* pMbCache) {
+bool WelsMdPSkipEnc (void* pEnc, void* pMd, SMB* pCurMb, SMbCache* pMbCache) {
   sWelsEncCtx* pEncCtx	= (sWelsEncCtx*)pEnc;
   SDqLayer* pCurLayer				= pEncCtx->pCurDqLayer;
   SWelsMD* pWelsMd					= (SWelsMD*)pMd;
@@ -1342,15 +1342,15 @@
   SMVUnitXY sQpelMvp = { sMvp.iMvX >> 2, sMvp.iMvY >> 2 };
   n = (pCurMb->iMbX << 4) + sQpelMvp.iMvX;
   if (n < -29)
-    return FALSE;
+    return false;
   else if (n > (int32_t) ((pCurLayer->iMbWidth << 4) + 12))
-    return FALSE;
+    return false;
 
   n = (pCurMb->iMbY << 4) + sQpelMvp.iMvY;
   if (n < -29)
-    return FALSE;
+    return false;
   else if (n > (int32_t) ((pCurLayer->iMbHeight << 4) + 12))
-    return FALSE;
+    return false;
 
   //luma
   pRefLuma += sQpelMvp.iMvY * iLineSizeY + sQpelMvp.iMvX;
@@ -1395,7 +1395,7 @@
     pCurMb->sP16x16Mv = sMvp;
     pCurLayer->pDecPic->sMvList[pCurMb->iMbXY] = sMvp;
 
-    return TRUE;
+    return true;
   }
 
   WelsDctMb (pMbCache->pCoeffLevel,  pEncMb, iEncStride, pDstLuma, pEncCtx->pFuncList->pfDctFourT4);
@@ -1428,11 +1428,11 @@
         pCurMb->sP16x16Mv = sMvp;
         pCurLayer->pDecPic->sMvList[pCurMb->iMbXY] = sMvp;
 
-        return TRUE;
+        return true;
       }
     }
   }
-  return FALSE;
+  return false;
 }
 
 const int32_t g_kiPixStrideIdx8x8[4] = {  0,                                             ME_REFINE_BUF_WIDTH_BLK8,
@@ -1586,7 +1586,7 @@
     pWelsMd->iCostLuma = iBestSatdCost;
 
 }
-BOOL_T WelsMdFirstIntraMode (void* pEnc, void* pMd, SMB* pCurMb, SMbCache* pMbCache) {
+bool WelsMdFirstIntraMode (void* pEnc, void* pMd, SMB* pCurMb, SMbCache* pMbCache) {
   sWelsEncCtx* pEncCtx	= (sWelsEncCtx*)pEnc;
   SWelsFuncPtrList* pFunc	= pEncCtx->pFuncList;
   SWelsMD* pWelsMd		= (SWelsMD*)pMd;
@@ -1611,10 +1611,10 @@
     WelsIMbChromaEncode (pEncCtx, pCurMb, pMbCache);  //add pEnc&rec to MD--2010.3.15
 
     pCurMb->pSadCost[0] = 0;
-    return TRUE; //intra_mb_type is best
+    return true; //intra_mb_type is best
   }
 
-  return FALSE;
+  return false;
 }
 
 void WelsMdInterMb (void* pEnc, void* pMd, SSlice* pSlice, SMB* pCurMb, SMbCache* pUnused) {
@@ -1625,13 +1625,13 @@
   const uint32_t kuiNeighborAvail	= pCurMb->uiNeighborAvail;
   const int32_t kiMbWidth			= pCurDqLayer->iMbWidth;
   const  SMB* top_mb				= pCurMb - kiMbWidth;
-  const bool_t bMbLeftAvailPskip	= ((kuiNeighborAvail & LEFT_MB_POS) ? IS_SKIP ((pCurMb - 1)->uiMbType) : false);
-  const bool_t bMbTopAvailPskip		= ((kuiNeighborAvail & TOP_MB_POS) ? IS_SKIP (top_mb->uiMbType) : false);
-  const bool_t bMbTopLeftAvailPskip	= ((kuiNeighborAvail & TOPLEFT_MB_POS) ? IS_SKIP ((top_mb - 1)->uiMbType) : false);
-  const bool_t bMbTopRightAvailPskip = ((kuiNeighborAvail & TOPRIGHT_MB_POS) ? IS_SKIP ((top_mb + 1)->uiMbType) : false);
-  BOOL_T bTrySkip = bMbLeftAvailPskip || bMbTopAvailPskip || bMbTopLeftAvailPskip || bMbTopRightAvailPskip;
-  BOOL_T bKeepSkip = bMbLeftAvailPskip && bMbTopAvailPskip && bMbTopRightAvailPskip;
-  BOOL_T bSkip = FALSE;
+  const bool bMbLeftAvailPskip	= ((kuiNeighborAvail & LEFT_MB_POS) ? IS_SKIP ((pCurMb - 1)->uiMbType) : false);
+  const bool bMbTopAvailPskip		= ((kuiNeighborAvail & TOP_MB_POS) ? IS_SKIP (top_mb->uiMbType) : false);
+  const bool bMbTopLeftAvailPskip	= ((kuiNeighborAvail & TOPLEFT_MB_POS) ? IS_SKIP ((top_mb - 1)->uiMbType) : false);
+  const bool bMbTopRightAvailPskip = ((kuiNeighborAvail & TOPRIGHT_MB_POS) ? IS_SKIP ((top_mb + 1)->uiMbType) : false);
+  bool bTrySkip = bMbLeftAvailPskip || bMbTopAvailPskip || bMbTopLeftAvailPskip || bMbTopRightAvailPskip;
+  bool bKeepSkip = bMbLeftAvailPskip && bMbTopAvailPskip && bMbTopRightAvailPskip;
+  bool bSkip = false;
 
   if (pEncCtx->pFuncList->pfInterMdBackgroundDecision (pEncCtx, pWelsMd, pSlice, pCurMb, pMbCache, &bKeepSkip)) {
     return;
@@ -1661,9 +1661,9 @@
 //////
 //  try the ordinary Pskip
 //////
-bool_t WelsMdInterJudgePskip (sWelsEncCtx* pEncCtx, SWelsMD* pWelsMd, SSlice* pSlice, SMB* pCurMb, SMbCache* pMbCache,
-                              BOOL_T bTrySkip) {
-  bool_t bRet = true;
+bool WelsMdInterJudgePskip (sWelsEncCtx* pEncCtx, SWelsMD* pWelsMd, SSlice* pSlice, SMB* pCurMb, SMbCache* pMbCache,
+                              bool bTrySkip) {
+  bool bRet = true;
   if (((pEncCtx->pRefPic->iPictureType == P_SLICE) && (pMbCache->uiRefMbType == MB_TYPE_SKIP
        || pMbCache->uiRefMbType == MB_TYPE_BACKGROUND)) ||
       bTrySkip) {
@@ -1743,8 +1743,8 @@
 //////
 //  try the BGD Pskip
 //////
-bool_t WelsMdInterJudgeBGDPskip (void* pCtx, void* pMd, SSlice* pSlice, SMB* pCurMb, SMbCache* pMbCache,
-                                 BOOL_T* bKeepSkip) {
+bool WelsMdInterJudgeBGDPskip (void* pCtx, void* pMd, SSlice* pSlice, SMB* pCurMb, SMbCache* pMbCache,
+                                 bool* bKeepSkip) {
   sWelsEncCtx* pEncCtx = (sWelsEncCtx*)pCtx;
   SWelsMD* pWelsMd = (SWelsMD*)pMd;
 
@@ -1775,8 +1775,8 @@
   return false;
 }
 
-bool_t WelsMdInterJudgeBGDPskipFalse (void* pCtx, void* pMd, SSlice* pSlice, SMB* pCurMb, SMbCache* pMbCache,
-                                      BOOL_T* bKeepSkip) {
+bool WelsMdInterJudgeBGDPskipFalse (void* pCtx, void* pMd, SSlice* pSlice, SMB* pCurMb, SMbCache* pMbCache,
+                                      bool* bKeepSkip) {
   return false;
 }
 
@@ -1785,7 +1785,7 @@
 //////
 //  update BGD related info
 //////
-void WelsMdInterUpdateBGDInfo (SDqLayer* pCurLayer,  SMB* pCurMb, const bool_t bCollocatedPredFlag,
+void WelsMdInterUpdateBGDInfo (SDqLayer* pCurLayer,  SMB* pCurMb, const bool bCollocatedPredFlag,
                                const int32_t iRefPictureType) {
   uint8_t* pTargetRefMbQpList = (pCurLayer->pDecPic->pRefMbQp);
   const int32_t kiMbXY = pCurMb->iMbXY;
@@ -1802,7 +1802,7 @@
   }
 }
 
-void WelsMdInterUpdateBGDInfoNULL (SDqLayer* pCurLayer, SMB* pCurMb, const bool_t bCollocatedPredFlag,
+void WelsMdInterUpdateBGDInfoNULL (SDqLayer* pCurLayer, SMB* pCurMb, const bool bCollocatedPredFlag,
                                    const int32_t iRefPictureType) {
 }
 
@@ -1820,9 +1820,9 @@
 }
 
 void WelsMdInterSecondaryModesEnc (sWelsEncCtx* pEncCtx, SWelsMD* pWelsMd, SSlice* pSlice, SMB* pCurMb,
-                                   SMbCache* pMbCache, const BOOL_T bSkip) {
+                                   SMbCache* pMbCache, const bool bSkip) {
   //step 2: Intra
-  const BOOL_T kbTrySkip = pEncCtx->pFuncList->pfFirstIntraMode (pEncCtx, pWelsMd, pCurMb, pMbCache);
+  const bool kbTrySkip = pEncCtx->pFuncList->pfFirstIntraMode (pEncCtx, pWelsMd, pCurMb, pMbCache);
   if (kbTrySkip)
     return;
 
--- a/codec/encoder/core/src/svc_enc_slice_segment.cpp
+++ b/codec/encoder/core/src/svc_enc_slice_segment.cpp
@@ -121,7 +121,7 @@
  */
 
 //slice parameter check for SM_FIXEDSLCNUM_SLICE
-bool_t CheckFixedSliceNumMultiSliceSetting (const int32_t kiMbNumInFrame, SSliceArgument* pSliceArg) {
+bool CheckFixedSliceNumMultiSliceSetting (const int32_t kiMbNumInFrame, SSliceArgument* pSliceArg) {
   int32_t* pSlicesAssignList		= (int32_t*) & (pSliceArg->uiSliceMbNum[0]);
   const uint32_t kuiSliceNum			= pSliceArg->iSliceNum;
   uint32_t uiSliceIdx				= 0;
@@ -141,7 +141,7 @@
 }
 
 //slice parameter check for SM_ROWMB_SLICE
-bool_t CheckRowMbMultiSliceSetting (const int32_t kiMbWidth, SSliceArgument* pSliceArg) {
+bool CheckRowMbMultiSliceSetting (const int32_t kiMbWidth, SSliceArgument* pSliceArg) {
   int32_t* pSlicesAssignList = (int32_t*) & (pSliceArg->uiSliceMbNum[0]);
   const uint32_t kuiSliceNum		= pSliceArg->iSliceNum;
   uint32_t uiSliceIdx			= 0;
@@ -157,7 +157,7 @@
 }
 
 //slice parameter check for SM_RASTER_SLICE
-bool_t CheckRasterMultiSliceSetting (const int32_t kiMbNumInFrame, SSliceArgument* pSliceArg) {
+bool CheckRasterMultiSliceSetting (const int32_t kiMbNumInFrame, SSliceArgument* pSliceArg) {
   int32_t*			pSlicesAssignList = (int32_t*) & (pSliceArg->uiSliceMbNum[0]);
   int32_t			iActualSliceCount	= 0;
 
@@ -494,7 +494,7 @@
  */
 int32_t InitSlicePEncCtx (SSliceCtx* pSliceCtx,
                           CMemoryAlign* pMa,
-                          bool_t bFmoUseFlag,
+                          bool bFmoUseFlag,
                           int32_t iMbWidth,
                           int32_t iMbHeight,
                           SMulSliceOption* pMso,
--- a/codec/encoder/core/src/svc_encode_mb.cpp
+++ b/codec/encoder/core/src/svc_encode_mb.cpp
@@ -325,7 +325,7 @@
   pFuncList->pfSetMemZeroSize8 (pCurMb->pNonZeroCount,	24);
 }
 
-BOOL_T WelsTryPYskip (sWelsEncCtx* pEncCtx, SMB* pCurMb, SMbCache* pMbCache) {
+bool WelsTryPYskip (sWelsEncCtx* pEncCtx, SMB* pCurMb, SMbCache* pMbCache) {
   int32_t iSingleCtrMb	= 0;
   int16_t* pRes = pMbCache->pCoeffLevel;
   const uint8_t kuiQp = pCurMb->uiLumaQp;
@@ -339,20 +339,20 @@
     pEncCtx->pFuncList->pfQuantizationFour4x4Max (pRes, pFF,  pMF, (int16_t*)aMax);
 
     for (j = 0; j < 4; j++) {
-      if (aMax[j] > 1) return FALSE;	// iSingleCtrMb += 9, can't be P_SKIP
+      if (aMax[j] > 1) return false;	// iSingleCtrMb += 9, can't be P_SKIP
       else if (aMax[j] == 1) {
         pEncCtx->pFuncList->pfScan4x4 (pBlock, pRes); //
         iSingleCtrMb += pEncCtx->pFuncList->pfCalculateSingleCtr4x4 (pBlock);
       }
-      if (iSingleCtrMb >= 6) 	return FALSE; //from JVT-O079
+      if (iSingleCtrMb >= 6) 	return false; //from JVT-O079
       pRes += 16;
       pBlock += 16;
     }
   }
-  return TRUE;
+  return true;
 }
 
-BOOL_T    WelsTryPUVskip (sWelsEncCtx* pEncCtx, SMB* pCurMb, SMbCache* pMbCache, int32_t iUV) {
+bool    WelsTryPUVskip (sWelsEncCtx* pEncCtx, SMB* pCurMb, SMbCache* pMbCache, int32_t iUV) {
   int16_t* pRes = ((iUV == 1) ? & (pMbCache->pCoeffLevel[256]) : & (pMbCache->pCoeffLevel[256 + 64]));
 
   const uint8_t kuiQp = g_kuiChromaQpTable[CLIP3_QP_0_51 (pCurMb->uiLumaQp +
@@ -362,7 +362,7 @@
   const int16_t* pFF = g_kiQuantInterFF[kuiQp];
 
   if (pEncCtx->pFuncList->pfQuantizationHadamard2x2Skip (pRes, pFF[0] << 1, pMF[0]>>1))
-    return FALSE;
+    return false;
   else {
     uint16_t aMax[4], j;
     int32_t iSingleCtrMb = 0;
@@ -370,16 +370,16 @@
     pEncCtx->pFuncList->pfQuantizationFour4x4Max (pRes, pFF,  pMF, (int16_t*)aMax);
 
     for (j = 0; j < 4; j++) {
-      if (aMax[j] > 1)		return FALSE;	// iSingleCtrMb += 9, can't be P_SKIP
+      if (aMax[j] > 1)		return false;	// iSingleCtrMb += 9, can't be P_SKIP
       else if (aMax[j] == 1) {
         pEncCtx->pFuncList->pfScan4x4Ac (pBlock, pRes);
         iSingleCtrMb += pEncCtx->pFuncList->pfCalculateSingleCtr4x4 (pBlock);
       }
-      if (iSingleCtrMb >= 7) return FALSE; //from JVT-O079
+      if (iSingleCtrMb >= 7) return false; //from JVT-O079
       pRes += 16;
       pBlock += 16;
     }
-    return TRUE;
+    return true;
   }
 }
 
--- a/codec/encoder/core/src/svc_encode_slice.cpp
+++ b/codec/encoder/core/src/svc_encode_slice.cpp
@@ -598,7 +598,7 @@
 //encapsulate two kinds of reconstruction:
 // first. store base or highest Dependency Layer with only one quality (without CS RS reconstruction)
 // second. lower than highest Dependency Layer, and for every Dependency Layer with one quality layer(single layer)
-void WelsPSliceMdEnc (sWelsEncCtx* pEncCtx, SSlice* pSlice,  const bool_t kbIsHighestDlayerFlag) { //pMd + encoding
+void WelsPSliceMdEnc (sWelsEncCtx* pEncCtx, SSlice* pSlice,  const bool kbIsHighestDlayerFlag) { //pMd + encoding
   const SSliceHeaderExt*	kpShExt				= &pSlice->sSliceHeaderExt;
   const SSliceHeader*		kpSh					= &kpShExt->sSliceHeader;
   const int32_t			kiSliceFirstMbXY	= kpSh->iFirstMbInSlice;
@@ -613,7 +613,7 @@
   WelsMdInterMbLoop (pEncCtx, pSlice, &sMd, kiSliceFirstMbXY);
 }
 
-void WelsPSliceMdEncDynamic (sWelsEncCtx* pEncCtx, SSlice* pSlice, const bool_t kbIsHighestDlayerFlag) {
+void WelsPSliceMdEncDynamic (sWelsEncCtx* pEncCtx, SSlice* pSlice, const bool kbIsHighestDlayerFlag) {
   const SSliceHeaderExt*	kpShExt				= &pSlice->sSliceHeaderExt;
   const SSliceHeader*		kpSh					= &kpShExt->sSliceHeader;
   const int32_t			kiSliceFirstMbXY	= kpSh->iFirstMbInSlice;
@@ -631,8 +631,8 @@
 void WelsCodePSlice (sWelsEncCtx* pEncCtx, SSlice* pSlice) {
   //pSlice-level init should be outside and before this function
   SDqLayer* pCurLayer			= pEncCtx->pCurDqLayer;
-  const bool_t kbBaseAvail		= pCurLayer->bBaseLayerAvailableFlag;
-  const bool_t kbHighestSpatial = pEncCtx->pSvcParam->iNumDependencyLayer ==
+  const bool kbBaseAvail		= pCurLayer->bBaseLayerAvailableFlag;
+  const bool kbHighestSpatial = pEncCtx->pSvcParam->iNumDependencyLayer ==
                                   (pCurLayer->sLayerInfo.sNalHeaderExt.uiDependencyId + 1);
 
   //MD switch
@@ -649,8 +649,8 @@
 void WelsCodePOverDynamicSlice (sWelsEncCtx* pEncCtx, SSlice* pSlice) {
   //pSlice-level init should be outside and before this function
   SDqLayer* pCurLayer			= pEncCtx->pCurDqLayer;
-  const bool_t kbBaseAvail		= pCurLayer->bBaseLayerAvailableFlag;
-  const bool_t kbHighestSpatial = pEncCtx->pSvcParam->iNumDependencyLayer ==
+  const bool kbBaseAvail		= pCurLayer->bBaseLayerAvailableFlag;
+  const bool kbHighestSpatial = pEncCtx->pSvcParam->iNumDependencyLayer ==
                                   (pCurLayer->sLayerInfo.sNalHeaderExt.uiDependencyId + 1);
 
   //MD switch
@@ -738,10 +738,10 @@
     const int32_t kiMbXY				= pMb->iMbXY;
     const int32_t kiMbX				= pMb->iMbX;
     const int32_t kiMbY				= pMb->iMbY;
-    BOOL_T     bLeft;
-    BOOL_T     bTop;
-    BOOL_T     bLeftTop;
-    BOOL_T     bRightTop;
+    bool     bLeft;
+    bool     bTop;
+    bool     bLeftTop;
+    bool     bRightTop;
     int32_t   iLeftXY, iTopXY, iLeftTopXY, iRightTopXY;
     const uint8_t  kuiSliceIdc		= WelsMbToSliceIdc (pSliceCtx, kiMbXY);
 
@@ -819,7 +819,7 @@
   UpdateMbNeighbourInfoForNextSlice (pSliceCtx, pMbList, iFirstMbIdxOfNextSlice, kiLastMbIdxInPartition);
 }
 
-BOOL_T DynSlcJudgeSliceBoundaryStepBack (void* pCtx, void* pSlice, SSliceCtx* pSliceCtx, SMB* pCurMb,
+bool DynSlcJudgeSliceBoundaryStepBack (void* pCtx, void* pSlice, SSliceCtx* pSliceCtx, SMB* pCurMb,
     SDynamicSlicingStack* pDss) {
   sWelsEncCtx* pEncCtx = (sWelsEncCtx*)pCtx;
   SSlice* pCurSlice = (SSlice*)pSlice;
@@ -830,12 +830,12 @@
   const int32_t  kiPartitaionId = pCurSlice->uiSliceIdx % kiActiveThreadsNum;
   const int32_t  kiLastMbIdxInPartition	= pEncCtx->pCurDqLayer->pLastMbIdxOfPartition[kiPartitaionId];
 
-  const BOOL_T    kbCurMbNotFirstMbOfCurSlice      = (pSliceCtx->pOverallMbMap[iCurMbIdx] ==
+  const bool    kbCurMbNotFirstMbOfCurSlice      = (pSliceCtx->pOverallMbMap[iCurMbIdx] ==
       pSliceCtx->pOverallMbMap[iCurMbIdx - 1]);
-  const BOOL_T    kbCurMbNotLastMbOfCurPartition = iCurMbIdx < kiLastMbIdxInPartition;
-  const BOOL_T    kbSliceNumNotExceedConstraint       = pSliceCtx->iSliceNumInFrame <
+  const bool    kbCurMbNotLastMbOfCurPartition = iCurMbIdx < kiLastMbIdxInPartition;
+  const bool    kbSliceNumNotExceedConstraint       = pSliceCtx->iSliceNumInFrame <
       pSliceCtx->iMaxSliceNumConstraint; /*tmp choice to avoid complex memory operation, 100520, to be modify*/
-  const BOOL_T    kbSliceNumReachConstraint               = (pSliceCtx->iSliceNumInFrame ==
+  const bool    kbSliceNumReachConstraint               = (pSliceCtx->iSliceNumInFrame ==
       pSliceCtx->iMaxSliceNumConstraint);
 
   if (pCurSlice->bDynamicSlicingSliceSizeCtrlFlag)
@@ -874,7 +874,7 @@
       WelsMutexUnlock (&pEncCtx->pSliceThreading->mutexSliceNumUpdate);
 #endif//MT_ENABLED
 
-    return TRUE;
+    return true;
   }
 
   if (
@@ -896,7 +896,7 @@
     WelsMutexUnlock (&pEncCtx->pSliceThreading->mutexSliceNumUpdate);
 #endif//MT_ENABLED
 
-  return FALSE;
+  return false;
 }
 
 ///////////////
--- a/codec/encoder/core/src/svc_mode_decision.cpp
+++ b/codec/encoder/core/src/svc_mode_decision.cpp
@@ -55,15 +55,15 @@
   const uint32_t kuiNeighborAvail = pCurMb->uiNeighborAvail;
   const int32_t kiMbWidth = pCurDqLayer->iMbWidth;
   const  SMB* kpTopMb = pCurMb - kiMbWidth;
-  const bool_t kbMbLeftAvailPskip	= ((kuiNeighborAvail & LEFT_MB_POS) ? IS_SKIP ((pCurMb - 1)->uiMbType) : false);
-  const bool_t kbMbTopAvailPskip			= ((kuiNeighborAvail & TOP_MB_POS) ? IS_SKIP (kpTopMb->uiMbType) : false);
-  const bool_t kbMbTopLeftAvailPskip		= ((kuiNeighborAvail & TOPLEFT_MB_POS) ? IS_SKIP ((kpTopMb - 1)->uiMbType) : false);
-  const bool_t kbMbTopRightAvailPskip	= ((kuiNeighborAvail & TOPRIGHT_MB_POS) ? IS_SKIP ((
+  const bool kbMbLeftAvailPskip	= ((kuiNeighborAvail & LEFT_MB_POS) ? IS_SKIP ((pCurMb - 1)->uiMbType) : false);
+  const bool kbMbTopAvailPskip			= ((kuiNeighborAvail & TOP_MB_POS) ? IS_SKIP (kpTopMb->uiMbType) : false);
+  const bool kbMbTopLeftAvailPskip		= ((kuiNeighborAvail & TOPLEFT_MB_POS) ? IS_SKIP ((kpTopMb - 1)->uiMbType) : false);
+  const bool kbMbTopRightAvailPskip	= ((kuiNeighborAvail & TOPRIGHT_MB_POS) ? IS_SKIP ((
       kpTopMb + 1)->uiMbType) : false);
 
-  BOOL_T bTrySkip  = kbMbLeftAvailPskip | kbMbTopAvailPskip | kbMbTopLeftAvailPskip | kbMbTopRightAvailPskip;
-  BOOL_T bKeepSkip = kbMbLeftAvailPskip & kbMbTopAvailPskip & kbMbTopRightAvailPskip;
-  BOOL_T bSkip = FALSE;
+  bool bTrySkip  = kbMbLeftAvailPskip | kbMbTopAvailPskip | kbMbTopLeftAvailPskip | kbMbTopRightAvailPskip;
+  bool bKeepSkip = kbMbLeftAvailPskip & kbMbTopAvailPskip & kbMbTopRightAvailPskip;
+  bool bSkip = false;
 
   if (pEncCtx->pFuncList->pfInterMdBackgroundDecision (pEncCtx, pWelsMd, pSlice, pCurMb, pMbCache, &bKeepSkip)) {
     return;
--- a/codec/encoder/core/src/svc_motion_estimate.cpp
+++ b/codec/encoder/core/src/svc_motion_estimate.cpp
@@ -155,7 +155,7 @@
   }
 }
 
-bool_t WelsMeSadCostSelect (int32_t* iSadCost, const uint16_t* kpMvdCost, int32_t* pBestCost, const int32_t kiDx,
+bool WelsMeSadCostSelect (int32_t* iSadCost, const uint16_t* kpMvdCost, int32_t* pBestCost, const int32_t kiDx,
                             const int32_t kiDy, int32_t* pIx, int32_t* pIy) {
   int32_t iTempSadCost[4];
   int32_t iInputSadCost = *pBestCost;
@@ -213,7 +213,7 @@
 
     int32_t iX, iY;
 
-    const bool_t kbIsBestCostWorse = WelsMeSadCostSelect (iSadCosts, kpMvdCost, &iBestCost, iMvDx, iMvDy, &iX, &iY);
+    const bool kbIsBestCostWorse = WelsMeSadCostSelect (iSadCosts, kpMvdCost, &iBestCost, iMvDx, iMvDy, &iX, &iY);
     if (kbIsBestCostWorse)
       break;
 
--- a/codec/encoder/core/src/svc_set_mb_syn_cavlc.cpp
+++ b/codec/encoder/core/src/svc_set_mb_syn_cavlc.cpp
@@ -68,7 +68,7 @@
   int32_t i = 0;
 
   SMVUnitXY sMvd[2];
-  bool_t* pPredFlag;
+  bool* pPredFlag;
   int8_t* pRemMode;
 
   int32_t iMbOffset = 0;
@@ -176,7 +176,7 @@
   int32_t iNumRefIdxl0ActiveMinus1 = pSliceHeadExt->sSliceHeader.uiNumRefIdxL0Active - 1;
   int32_t i;
 
-  bool_t bSubRef0 = false;
+  bool bSubRef0 = false;
   const uint8_t* kpScan4 = & (g_kuiMbCountScan4Idx[0]);
 
   /* mb type */
--- a/codec/encoder/core/src/utils.cpp
+++ b/codec/encoder/core/src/utils.cpp
@@ -57,8 +57,8 @@
 
 namespace WelsSVCEnc {
 
-void WelsLogDefault (void* pCtx, const int32_t kiLevel, const str_t* kpFmtStr, va_list argv);
-void WelsLogNil (void* pCtx, const int32_t kiLevel, const str_t* kpFmtStr, va_list argv);
+void WelsLogDefault (void* pCtx, const int32_t kiLevel, const char* kpFmtStr, va_list argv);
+void WelsLogNil (void* pCtx, const int32_t kiLevel, const char* kpFmtStr, va_list argv);
 
 float WelsCalcPsnr (const void* kpTarPic,
                     const int32_t kiTarStride,
@@ -86,10 +86,10 @@
  * \param	kiLevel		log iLevel
  * \return  tag of log iLevel
  */
-static inline str_t* GetLogTag (const int32_t kiLevel, int32_t* pBit) {
+static inline char* GetLogTag (const int32_t kiLevel, int32_t* pBit) {
   int32_t iShift	= 0;
   int32_t iVal		= 0;
-  bool_t	bFound	= false;
+  bool	bFound	= false;
 
   if (kiLevel <= 0 || kiLevel > (1 << (WELS_LOG_LEVEL_COUNT - 1)) || NULL == pBit)
     return NULL;
@@ -107,7 +107,7 @@
 
   if (bFound) {
     *pBit	= iShift;
-    return (str_t*)g_sWelsLogTags[iShift];
+    return (char*)g_sWelsLogTags[iShift];
   }
   return NULL;
 }
@@ -126,7 +126,7 @@
  * \note	N/A
  *************************************************************************************
  */
-void WelsLogDefault (void* pCtx, const int32_t kiLevel, const str_t* kpFmtStr, va_list argv) {
+void WelsLogDefault (void* pCtx, const int32_t kiLevel, const char* kpFmtStr, va_list argv) {
   sWelsEncCtx* pEncCtx	= (sWelsEncCtx*)pCtx;
   iWelsLogLevel		 iVal	= (kiLevel & g_iLevelLog);
 
@@ -133,7 +133,7 @@
   if (0 == iVal || NULL == pEncCtx) {	// such iLevel not enabled
     return;
   } else {
-    str_t pBuf[WELS_LOG_BUF_SIZE + 1] = {0};
+    char pBuf[WELS_LOG_BUF_SIZE + 1] = {0};
     const int32_t kiBufSize = sizeof (pBuf) / sizeof (pBuf[0]) - 1;
     int32_t iCurUsed = 0;
     int32_t iBufUsed = 0;
@@ -205,7 +205,7 @@
     // fixed stack corruption issue on vs2008
     if (iBufLeft > 0) {
       int32_t i_shift = 0;
-      str_t* pStr = NULL;
+      char* pStr = NULL;
       pStr	= GetLogTag (kiLevel, &i_shift);
       if (NULL != pStr) {
         iCurUsed = WelsSnprintf (&pBuf[iBufUsed], iBufLeft, "%s ", pStr);
@@ -242,7 +242,7 @@
 #endif//ENABLE_TRACE_FILE
   }
 }
-void WelsLogNil (void* pCtx, const int32_t kiLevel, const str_t* kpFmtStr, va_list argv) {
+void WelsLogNil (void* pCtx, const int32_t kiLevel, const char* kpFmtStr, va_list argv) {
   // NULL implementation
 }
 
@@ -258,7 +258,7 @@
 * \note	N/A
 *************************************************************************************
 */
-void WelsReopenTraceFile (void* pCtx, str_t* pCurPath) {
+void WelsReopenTraceFile (void* pCtx, char* pCurPath) {
 #ifdef ENABLE_TRACE_FILE
   sWelsEncCtx* pEncCtx	= (sWelsEncCtx*)pCtx;
   if (wlog == WelsLogDefault) {
@@ -330,11 +330,11 @@
   wlog	= _log;
 }
 
-void WelsLogCall (void* pCtx, int32_t iLevel, const str_t* kpFmt, va_list vl) {
+void WelsLogCall (void* pCtx, int32_t iLevel, const char* kpFmt, va_list vl) {
   wlog (pCtx, iLevel, kpFmt, vl);
 }
 
-void WelsLog (void* pCtx, int32_t iLevel, const str_t* kpFmt, ...) {
+void WelsLog (void* pCtx, int32_t iLevel, const char* kpFmt, ...) {
   va_list vl;
   va_start (vl, kpFmt);
   WelsLogCall (pCtx, iLevel, kpFmt, vl);
--- a/codec/encoder/core/src/wels_preprocess.cpp
+++ b/codec/encoder/core/src/wels_preprocess.cpp
@@ -60,7 +60,7 @@
 typedef EResult (WELSAPI* pfnDestroyVpInterface) (void*, int);
 
 int32_t WelsInitScaledPic (SWelsSvcCodingParam* pParam,  Scaled_Picture*  pScaledPic, CMemoryAlign* pMemoryAlign);
-bool_t  JudgeNeedOfScaling (SWelsSvcCodingParam* pParam, Scaled_Picture* pScaledPic);
+bool  JudgeNeedOfScaling (SWelsSvcCodingParam* pParam, Scaled_Picture* pScaledPic);
 void    FreeScaledPic (Scaled_Picture*  pScaledPic, CMemoryAlign* pMemoryAlign);
 
 //******* table definition ***********************************************************************//
@@ -86,14 +86,14 @@
 
 #ifndef NO_DYNAMIC_VP
 #if defined(_WIN32)
-  const str_t WelsVPLib[] = "welsvp.dll";
+  const char WelsVPLib[] = "welsvp.dll";
   HMODULE shModule = LoadLibrary (WelsVPLib);
   if (!shModule)
     WelsLog (pEncCtx, WELS_LOG_ERROR, "welsvp load lib dynamic failed module=%x\n", shModule);
 
 #elif defined(MACOS)
-  const str_t WelsVPLib[] = "welsvp.bundle";
-  str_t pCurPath[256];
+  const char WelsVPLib[] = "welsvp.bundle";
+  char pCurPath[256];
   GetCurrentModulePath (pCurPath, 256);
   strlcat (pCurPath, WelsVPLib, 256);
   CFBundleRef shModule = LoadBundle (pCurPath);
@@ -101,7 +101,7 @@
     WelsLog (pEncCtx, WELS_LOG_ERROR, "welsvp load lib dynamic failed module=%x\n", shModule);
 
 #elif defined(__GNUC__)
-  const str_t WelsVPLib[] = "./libwelsvp.so";
+  const char WelsVPLib[] = "./libwelsvp.so";
   void* shModule = NULL;
   shModule = dlopen (WelsVPLib, RTLD_LAZY);
   if (shModule == NULL)
@@ -132,7 +132,7 @@
 #endif
 }
 
-void* CWelsLib::QueryFunction (const str_t* pName) {
+void* CWelsLib::QueryFunction (const char* pName) {
   void* pFunc = NULL;
 
 #ifndef NO_DYNAMIC_VP
@@ -208,7 +208,7 @@
   m_pInterfaceVp = NULL;
   m_pEncLib = NULL;
   m_bInitDone = false;
-  m_bOfficialBranch  = FALSE;
+  m_bOfficialBranch  = false;
   m_pEncCtx = pEncCtx;
   memset (&m_sScaledPicture, 0, sizeof (m_sScaledPicture));
 }
@@ -281,12 +281,12 @@
       for (int32_t i = 0; i < iNumDependencyLayer; i++) {
         if (pSvcParam->sDependencyLayers[i].iFrameWidth != pic_queue[i]->iPicWidth ||
             pSvcParam->sDependencyLayers[i].iFrameHeight != pic_queue[i]->iPicHeight) {
-          m_bOfficialBranch = TRUE;
+          m_bOfficialBranch = true;
           break;
         }
       }
     }
-    m_bInitDone = TRUE;
+    m_bInitDone = true;
   }
 
   if (m_pInterfaceVp == NULL)
@@ -313,8 +313,8 @@
 int32_t CWelsPreProcess::WelsPreprocessStep3 (void* pCtx, const int32_t kiDidx) {
   sWelsEncCtx* pEncCtx = (sWelsEncCtx*)pCtx;
   SWelsSvcCodingParam* pSvcParam = pEncCtx->pSvcParam;
-  bool_t bNeededMbAq = (pSvcParam->bEnableAdaptiveQuant && (pEncCtx->eSliceType == P_SLICE));
-  bool_t bCalculateBGD = (pEncCtx->eSliceType == P_SLICE && pSvcParam->bEnableBackgroundDetection);
+  bool bNeededMbAq = (pSvcParam->bEnableAdaptiveQuant && (pEncCtx->eSliceType == P_SLICE));
+  bool bCalculateBGD = (pEncCtx->eSliceType == P_SLICE && pSvcParam->bEnableBackgroundDetection);
 
   int32_t iCurTemporalIdx  = pEncCtx->uiSpatialLayersInTemporal[kiDidx] - 1;
 
@@ -327,8 +327,8 @@
   SPicture* pRefPic = pEncCtx->pSpatialPic[kiDidx][iRefTemporalIdx];
   {
     SPicture* pLastPic = m_pLastSpatialPicture[kiDidx][0];
-    bool_t bCalculateSQDiff = ((pLastPic->pData[0] == pRefPic->pData[0]) && bNeededMbAq);
-    bool_t bCalculateVar = (pSvcParam->iRCMode == RC_MODE1 && pEncCtx->eSliceType == I_SLICE);
+    bool bCalculateSQDiff = ((pLastPic->pData[0] == pRefPic->pData[0]) && bNeededMbAq);
+    bool bCalculateVar = (pSvcParam->iRCMode == RC_MODE1 && pEncCtx->eSliceType == I_SLICE);
 
     VaaCalculation (pEncCtx->pVaa, pCurPic, pRefPic, bCalculateSQDiff, bCalculateVar, bCalculateBGD);
   }
@@ -517,12 +517,12 @@
 /*!
  * \brief	Whether input picture need be scaled?
  */
-bool_t JudgeNeedOfScaling (SWelsSvcCodingParam* pParam, Scaled_Picture* pScaledPicture) {
+bool JudgeNeedOfScaling (SWelsSvcCodingParam* pParam, Scaled_Picture* pScaledPicture) {
   const int32_t kiInputPicWidth	= pParam->SUsedPicRect.iWidth;
   const int32_t kiInputPicHeight = pParam->SUsedPicRect.iHeight;
   const int32_t kiDstPicWidth		= pParam->sDependencyLayers[pParam->iNumDependencyLayer - 1].iActualWidth;
   const int32_t kiDstPicHeight	= pParam->sDependencyLayers[pParam->iNumDependencyLayer - 1].iActualHeight;
-  bool_t bNeedDownsampling = true;
+  bool bNeedDownsampling = true;
 
   int32_t iSpatialIdx = pParam->iNumDependencyLayer - 1;
 
@@ -551,7 +551,7 @@
 }
 
 int32_t  WelsInitScaledPic (SWelsSvcCodingParam* pParam,  Scaled_Picture*  pScaledPicture, CMemoryAlign* pMemoryAlign) {
-  bool_t bInputPicNeedScaling = JudgeNeedOfScaling (pParam, pScaledPicture);
+  bool bInputPicNeedScaling = JudgeNeedOfScaling (pParam, pScaledPicture);
   if (bInputPicNeedScaling) {
     pScaledPicture->pScaledInputPicture = AllocPicture (pMemoryAlign, pParam->SUsedPicRect.iWidth,
                                           pParam->SUsedPicRect.iHeight, false);
@@ -611,8 +611,8 @@
   m_pInterfaceVp->Process (iMethodIdx, &sSrcPixMap, NULL);
 }
 
-bool_t CWelsPreProcess::DetectSceneChange (SPicture* pCurPicture, SPicture* pRefPicture) {
-  bool_t bSceneChangeFlag = false;
+bool CWelsPreProcess::DetectSceneChange (SPicture* pCurPicture, SPicture* pRefPicture) {
+  bool bSceneChangeFlag = false;
   int32_t iMethodIdx = METHOD_SCENE_CHANGE_DETECTION;
   SSceneChangeResult sSceneChangeDetectResult = {0};
   SPixMap sSrcPixMap = {0};
@@ -688,7 +688,7 @@
 
 //*********************************************************************************************************/
 void CWelsPreProcess::VaaCalculation (SVAAFrameInfo* pVaaInfo, SPicture* pCurPicture, SPicture* pRefPicture,
-                                      bool_t bCalculateSQDiff, bool_t bCalculateVar, bool_t bCalculateBGD) {
+                                      bool bCalculateSQDiff, bool bCalculateVar, bool bCalculateBGD) {
   pVaaInfo->sVaaCalcInfo.pCurY = pCurPicture->pData[0];
   pVaaInfo->sVaaCalcInfo.pRefY = pRefPicture->pData[0];
   {
@@ -722,7 +722,7 @@
 }
 
 void CWelsPreProcess::BackgroundDetection (SVAAFrameInfo* pVaaInfo, SPicture* pCurPicture, SPicture* pRefPicture,
-    bool_t bDetectFlag) {
+    bool bDetectFlag) {
   if (bDetectFlag) {
     pVaaInfo->iPicWidth     = pCurPicture->iWidthInPixel;
     pVaaInfo->iPicHeight    = pCurPicture->iHeightInPixel;
@@ -834,7 +834,7 @@
 
 
 void CWelsPreProcess::AnalyzePictureComplexity (void* pCtx, SPicture* pCurPicture, SPicture* pRefPicture,
-    const int32_t kiDependencyId, const bool_t bCalculateBGD) {
+    const int32_t kiDependencyId, const bool bCalculateBGD) {
   sWelsEncCtx* pEncCtx	= (sWelsEncCtx*)pCtx;
   SWelsSvcCodingParam* pSvcParam = pEncCtx->pSvcParam;
   SVAAFrameInfo* pVaaInfo			= pEncCtx->pVaa;
--- a/codec/encoder/plus/inc/welsCodecTrace.h
+++ b/codec/encoder/plus/inc/welsCodecTrace.h
@@ -36,7 +36,7 @@
 #include <stdarg.h>
 #include "typedefs.h"
 
-typedef int32_t (*CM_WELS_TRACE) (const str_t* format, ...);
+typedef int32_t (*CM_WELS_TRACE) (const char* format, ...);
 
 class welsCodecTrace {
  public:
@@ -43,8 +43,8 @@
   welsCodecTrace();
   ~welsCodecTrace();
 
-  static void TraceString (int32_t iLevel, const str_t* kpStrFormat);
-  static void CODEC_TRACE (void* pIgnore, const int32_t kiLevel, const str_t* kpStrFormat, va_list vl);
+  static void TraceString (int32_t iLevel, const char* kpStrFormat);
+  static void CODEC_TRACE (void* pIgnore, const int32_t kiLevel, const char* kpStrFormat, va_list vl);
 
   void SetTraceLevel (const int32_t kiLevel);
   int32_t WelsTraceModuleIsExist();
--- a/codec/encoder/plus/inc/welsEncoderExt.h
+++ b/codec/encoder/plus/inc/welsEncoderExt.h
@@ -114,12 +114,12 @@
   int32_t						m_iMaxPicHeight;
 
   int32_t						m_iCspInternal;
-  BOOL_T					m_bInitialFlag;
+  bool					m_bInitialFlag;
 
 #ifdef OUTPUT_BIT_STREAM
   FILE*				m_pFileBs;
   FILE*               m_pFileBsSize;
-  BOOL_T				m_bSwitch;
+  bool				m_bSwitch;
   int32_t					m_iSwitchTimes;
 #endif//OUTPUT_BIT_STREAM
 
--- a/codec/encoder/plus/src/welsCodecTrace.cpp
+++ b/codec/encoder/plus/src/welsCodecTrace.cpp
@@ -86,7 +86,7 @@
   return m_WelsTraceExistFlag;
 }
 
-void welsCodecTrace::TraceString (int32_t iLevel, const str_t* str) {
+void welsCodecTrace::TraceString (int32_t iLevel, const char* str) {
   switch (iLevel) {
   case WELS_LOG_ERROR:
     if (m_fpErrorTrace)
@@ -113,13 +113,13 @@
 
 #define MAX_LOG_SIZE	1024
 
-void welsCodecTrace::CODEC_TRACE (void* ignore, const int32_t iLevel, const str_t* Str_Format, va_list vl) {
+void welsCodecTrace::CODEC_TRACE (void* ignore, const int32_t iLevel, const char* Str_Format, va_list vl) {
 //		if(g_traceLevel < iLevel)
   if (m_iTraceLevel < iLevel) {
     return;
   }
 
-  str_t pBuf[MAX_LOG_SIZE] = {0};
+  char pBuf[MAX_LOG_SIZE] = {0};
   const int32_t len	= strlen ("[ENCODER]: ");	// confirmed_safe_unsafe_usage
 
 
--- a/codec/encoder/plus/src/welsEncoderExt.cpp
+++ b/codec/encoder/plus/src/welsEncoderExt.cpp
@@ -68,18 +68,18 @@
     m_iMaxPicWidth (0),
     m_iMaxPicHeight (0),
     m_iCspInternal (0),
-    m_bInitialFlag (FALSE) {
+    m_bInitialFlag (false) {
 #ifdef REC_FRAME_COUNT
   int32_t m_uiCountFrameNum = 0;
 #endif//REC_FRAME_COUNT
 
 #ifdef OUTPUT_BIT_STREAM
-  str_t strStreamFileName[1024] = { 0 };  //for .264
+  char strStreamFileName[1024] = { 0 };  //for .264
   int32_t iBufferUsed = 0;
   int32_t iBufferLeft = 1023;
   int32_t iCurUsed;
 
-  str_t strLenFileName[1024] = { 0 }; //for .len
+  char strLenFileName[1024] = { 0 }; //for .len
   int32_t iBufferUsedSize = 0;
   int32_t iBufferLeftSize = 1023;
   int32_t iCurUsedSize;
@@ -135,7 +135,7 @@
   m_pFileBs     = WelsFopen (strStreamFileName, "wb");
   m_pFileBsSize = WelsFopen (strLenFileName, "wb");
 
-  m_bSwitch	= FALSE;
+  m_bSwitch	= false;
   m_iSwitchTimes	= 0;
 #endif//OUTPUT_BIT_STREAM
 
@@ -171,7 +171,7 @@
     WelsFclose (m_pFileBsSize);
     m_pFileBsSize = NULL;
   }
-  m_bSwitch	= FALSE;
+  m_bSwitch	= false;
   m_iSwitchTimes	= 0;
 #endif//OUTPUT_BIT_STREAM
 
@@ -414,7 +414,7 @@
   }
 
   m_iCspInternal	= iColorspace;
-  m_bInitialFlag  = TRUE;
+  m_bInitialFlag  = true;
 
   return cmResultSuccess;
 }
@@ -458,7 +458,7 @@
     m_pEncContext	= NULL;
   }
 
-  m_bInitialFlag = FALSE;
+  m_bInitialFlag = false;
 
   return 0;
 }
@@ -578,7 +578,7 @@
         WelsFclose (m_pFileBsSize);
         m_pFileBsSize = NULL;
       }
-      str_t strStreamFileName[128] = {0};
+      char strStreamFileName[128] = {0};
       int32_t iLen = WelsSnprintf (strStreamFileName, 128, "adj%d_w%d.264", m_iSwitchTimes,
                                    m_pEncContext->pSvcParam->iActualPicWidth);
       m_pFileBs = WelsFopen (strStreamFileName, "wb");
@@ -587,7 +587,7 @@
       m_pFileBsSize = WelsFopen (strStreamFileName, "wb");
 
 
-      m_bSwitch = FALSE;
+      m_bSwitch = false;
     }
 
     for (i = 0; i < pBsInfo->iLayerNum; i++) {
@@ -665,7 +665,7 @@
     return cmInitParaError;
   }
 
-  if (NULL == m_pEncContext || FALSE == m_bInitialFlag) {
+  if (NULL == m_pEncContext || false == m_bInitialFlag) {
     return cmInitExpected;
   }
 
@@ -783,7 +783,7 @@
     if (sEncodingParam.sSpatialLayers[sEncodingParam.iSpatialLayerNum - 1].iVideoWidth !=
         m_pEncContext->pSvcParam->sDependencyLayers[m_pEncContext->pSvcParam->iNumDependencyLayer - 1].iFrameWidth) {
       ++ m_iSwitchTimes;
-      m_bSwitch = TRUE;
+      m_bSwitch = true;
     }
 #endif//OUTPUT_BIT_STREAM
     if (sEncodingParam.iSpatialLayerNum < 1
@@ -887,7 +887,7 @@
   }
   break;
   case ENCODER_OPTION_ENABLE_SSEI: {
-    bool_t iValue = * ((bool_t*)pOption);
+    bool iValue = * ((bool*)pOption);
     m_pEncContext->pSvcParam->bEnableSSEI = iValue;
     WelsLog (m_pEncContext, WELS_LOG_INFO, " CWelsH264SVCEncoder::SetOption enable SSEI = %d \n",
              m_pEncContext->pSvcParam->bEnableSSEI);
@@ -894,7 +894,7 @@
   }
   break;
   case ENCODER_OPTION_ENABLE_PREFIX_NAL_ADDING: {
-    bool_t iValue = * ((bool_t*)pOption);
+    bool iValue = * ((bool*)pOption);
     m_pEncContext->pSvcParam->bPrefixNalAddingCtrl = iValue;
     WelsLog (m_pEncContext, WELS_LOG_INFO, " CWelsH264SVCEncoder::SetOption bPrefixNalAddingCtrl = %d \n",
              m_pEncContext->pSvcParam->bPrefixNalAddingCtrl);
@@ -901,7 +901,7 @@
   }
   break;
   case ENCODER_OPTION_ENABLE_SPS_PPS_ID_ADDITION: {
-    bool_t iValue = * ((bool_t*)pOption);
+    bool iValue = * ((bool*)pOption);
 
     m_pEncContext->pSvcParam->bEnableSpsPpsIdAddition = iValue;
     WelsLog (m_pEncContext, WELS_LOG_INFO, " CWelsH264SVCEncoder::SetOption enable SPS/PPS ID = %d \n",
@@ -910,7 +910,7 @@
   break;
   case ENCODER_OPTION_CURRENT_PATH: {
     if (m_pEncContext->pSvcParam != NULL) {
-      str_t* path = static_cast<str_t*> (pOption);
+      char* path = static_cast<char*> (pOption);
       m_pEncContext->pSvcParam->pCurPath = path;
     }
   }
@@ -926,7 +926,7 @@
   if (NULL == pOption) {
     return cmInitParaError;
   }
-  if (NULL == m_pEncContext || FALSE == m_bInitialFlag) {
+  if (NULL == m_pEncContext || false == m_bInitialFlag) {
     return cmInitExpected;
   }
 
@@ -991,7 +991,7 @@
 void CWelsH264SVCEncoder::DumpSrcPicture (const uint8_t* pSrc) {
 #ifdef DUMP_SRC_PICTURE
   FILE* pFile = NULL;
-  str_t strFileName[256] = {0};
+  char strFileName[256] = {0};
   const int32_t iDataLength = m_iMaxPicWidth * m_iMaxPicHeight;
 
   WelsStrncpy (strFileName, 256, "pic_in_");	// confirmed_safe_unsafe_usage
--- a/codec/processing/src/backgrounddetection/BackgroundDetection.cpp
+++ b/codec/processing/src/backgrounddetection/BackgroundDetection.cpp
@@ -201,7 +201,7 @@
   return WELS_ABS (ASD);
 }
 
-inline bool_t CBackgroundDetection::ForegroundDilation23Luma (SBackgroundOU* pBackgroundOU,
+inline bool CBackgroundDetection::ForegroundDilation23Luma (SBackgroundOU* pBackgroundOU,
     SBackgroundOU* pOUNeighbours[]) {
   SBackgroundOU* pOU_L	= pOUNeighbours[0];
   SBackgroundOU* pOU_R	= pOUNeighbours[1];
@@ -234,7 +234,7 @@
   return 0;
 }
 
-inline bool_t CBackgroundDetection::ForegroundDilation23Chroma (int8_t iNeighbourForegroundFlags,
+inline bool CBackgroundDetection::ForegroundDilation23Chroma (int8_t iNeighbourForegroundFlags,
     int32_t iStartSamplePos, int32_t iPicStrideUV, vBGDParam* pBgdParam) {
   static const int8_t kaOUPos[4]	= {OU_LEFT, OU_RIGHT, OU_TOP, OU_BOTTOM};
   int32_t	aEdgeOffset[4]	= {0, BGD_OU_SIZE_UV - 1, 0, iPicStrideUV* (BGD_OU_SIZE_UV - 1)};
--- a/codec/processing/src/backgrounddetection/BackgroundDetection.h
+++ b/codec/processing/src/backgrounddetection/BackgroundDetection.h
@@ -83,9 +83,9 @@
   inline SBackgroundOU* AllocateOUArrayMemory (int32_t iWidth, int32_t iHeight);
   inline void     FreeOUArrayMemory();
   inline int32_t  CalculateAsdChromaEdge (uint8_t* pOriRef, uint8_t* pOriCur, int32_t iStride);
-  inline bool_t   ForegroundDilation23Luma (SBackgroundOU* pBackgroundOU,
+  inline bool   ForegroundDilation23Luma (SBackgroundOU* pBackgroundOU,
       SBackgroundOU* pOUNeighbours[]); //Foreground_Dilation_2_3_Luma
-  inline bool_t   ForegroundDilation23Chroma (int8_t iNeighbourForegroundFlags, int32_t iStartSamplePos,
+  inline bool   ForegroundDilation23Chroma (int8_t iNeighbourForegroundFlags, int32_t iStartSamplePos,
       int32_t iPicStrideUV, vBGDParam* pBgdParam);//Foreground_Dilation_2_3_Chroma
   inline void     ForegroundDilation (SBackgroundOU* pBackgroundOU, SBackgroundOU* pOUNeighbours[], vBGDParam* pBgdParam,
                                       int32_t	iChromaSampleStartPos);
--- a/codec/processing/src/common/WelsFrameWork.cpp
+++ b/codec/processing/src/common/WelsFrameWork.cpp
@@ -220,8 +220,8 @@
   return eReturn;
 }
 
-bool_t  CVpFrameWork::CheckValid (EMethods eMethod, SPixMap& pSrcPixMap, SPixMap& pDstPixMap) {
-  bool_t eReturn = FALSE;
+bool  CVpFrameWork::CheckValid (EMethods eMethod, SPixMap& pSrcPixMap, SPixMap& pDstPixMap) {
+  bool eReturn = false;
 
   if (eMethod == METHOD_NULL)
     goto exit;
@@ -253,7 +253,7 @@
         || pDstPixMap.sRect.iRectLeft >= pDstPixMap.sRect.iRectWidth || pDstPixMap.sRect.iRectWidth > pDstPixMap.iStride[0])
       goto exit;
   }
-  eReturn = TRUE;
+  eReturn = true;
 
 exit:
   return eReturn;
--- a/codec/processing/src/common/WelsFrameWork.h
+++ b/codec/processing/src/common/WelsFrameWork.h
@@ -62,7 +62,7 @@
     m_eMethod  = METHOD_NULL;
     m_eFormat  = VIDEO_FORMAT_I420;
     m_iIndex   = 0;
-    m_bInit    = FALSE;
+    m_bInit    = false;
   };
 
   virtual ~IStrategy() {}
@@ -92,7 +92,7 @@
   EMethods       m_eMethod;
   EVideoFormat m_eFormat;
   int32_t           m_iIndex;
-  bool_t            m_bInit;
+  bool            m_bInit;
 };
 
 class CVpFrameWork : public IWelsVP {
@@ -116,7 +116,7 @@
   EResult SpecialFeature (int32_t iType, void* pIn, void* pOut);
 
  private:
-  bool_t  CheckValid (EMethods eMethod, SPixMap& sSrc, SPixMap& sDst);
+  bool  CheckValid (EMethods eMethod, SPixMap& sSrc, SPixMap& sDst);
   IStrategy* CreateStrategy (EMethods eMethod, int32_t iCpuFlag);
 
  private:
--- a/codec/processing/src/common/memory.cpp
+++ b/codec/processing/src/common/memory.cpp
@@ -35,7 +35,7 @@
 WELSVP_NAMESPACE_BEGIN
 /////////////////////////////////////////////////////////////////////////////////
 
-void* WelsMalloc (const uint32_t kuiSize, str_t* pTag) {
+void* WelsMalloc (const uint32_t kuiSize, char* pTag) {
   const int32_t kiSizeVoidPointer	= sizeof (void**);
   const int32_t kiSizeInt32		= sizeof (int32_t);
   const int32_t kiAlignedBytes	= ALIGNBYTES - 1;
@@ -59,7 +59,7 @@
 
 /////////////////////////////////////////////////////////////////////////////
 
-void WelsFree (void* pPointer, str_t* pTag) {
+void WelsFree (void* pPointer, char* pTag) {
   if (pPointer) {
     ::free (* (((void**) pPointer) - 1));
   }
@@ -67,7 +67,7 @@
 
 /////////////////////////////////////////////////////////////////////////////
 
-void* InternalReallocate (void* pPointer, const uint32_t kuiSize, str_t* pTag) {
+void* InternalReallocate (void* pPointer, const uint32_t kuiSize, char* pTag) {
   uint32_t iOldSize = 0;
   uint8_t* pNew = NULL;
   if (pPointer != NULL)
@@ -91,7 +91,7 @@
 
 /////////////////////////////////////////////////////////////////////////////
 
-void* WelsRealloc (void* pPointer, uint32_t* pRealSize, const uint32_t kuiSize, str_t* pTag) {
+void* WelsRealloc (void* pPointer, uint32_t* pRealSize, const uint32_t kuiSize, char* pTag) {
   const uint32_t kuiOldSize = *pRealSize;
   uint32_t kuiNewSize = 0;
   void* pLocalPointer = NULL;
--- a/codec/processing/src/common/memory.h
+++ b/codec/processing/src/common/memory.h
@@ -70,7 +70,7 @@
 * \note	N/A
 *************************************************************************************
 */
-void* WelsMalloc (const uint32_t kuiSize, str_t* pTag = NULL);
+void* WelsMalloc (const uint32_t kuiSize, char* pTag = NULL);
 
 /*!
 *************************************************************************************
@@ -84,7 +84,7 @@
 * \note	N/A
 *************************************************************************************
 */
-void WelsFree (void* pPointer, str_t* pTag = NULL);
+void WelsFree (void* pPointer, char* pTag = NULL);
 
 /*!
 *************************************************************************************
@@ -100,7 +100,7 @@
 * \note	N/A
 *************************************************************************************
 */
-void* WelsRealloc (void*  pPointer, uint32_t* pRealSize, const uint32_t kuiSize, str_t* pTag = NULL);
+void* WelsRealloc (void*  pPointer, uint32_t* pRealSize, const uint32_t kuiSize, char* pTag = NULL);
 
 //////////////////////////////////////////////////////////////////////////////////////
 WELSVP_NAMESPACE_END
--- a/codec/processing/src/common/typedef.h
+++ b/codec/processing/src/common/typedef.h
@@ -73,14 +73,6 @@
 
 #endif
 
-typedef char    str_t    ; // [comment]: specific use plain char only for character parameters
-typedef bool    bool_t   ;
-
-enum {
-  FALSE = 0,
-  TRUE  = !FALSE
-};
-
 WELSVP_NAMESPACE_END
 
 #endif