diff --git a/codec/encoder/core/inc/ref_list_mgr_svc.h b/codec/encoder/core/inc/ref_list_mgr_svc.h
index 34f65db7..4d4fd0ea 100644
--- a/codec/encoder/core/inc/ref_list_mgr_svc.h
+++ b/codec/encoder/core/inc/ref_list_mgr_svc.h
@@ -77,11 +77,11 @@ void WelsResetRefList (sWelsEncCtx* pCtx);
 /*
  *	update reference picture list
  */
-bool WelsUpdateRefList (sWelsEncCtx* pCtx);
+bool WelsUpdateRefList (void* pCtx);
 /*
  *	build reference picture list
  */
-bool WelsBuildRefList (sWelsEncCtx* pCtx, const int32_t kiPOC);
+bool WelsBuildRefList (void* pCtx, const int32_t kiPOC,int32_t iBestLtrRefIdx);
 
 /*
  *	update syntax for reference base related
@@ -96,7 +96,9 @@ bool CheckCurMarkFrameNumUsed (sWelsEncCtx* pCtx);
 /*
 *	decide whether current frame include long term reference mark and update long term reference mark syntax
 */
-void WelsMarkPic (sWelsEncCtx* pCtx);
+void WelsMarkPic (void* pCtx);
+
+void InitRefListMgrFunc(SWelsFuncPtrList* pFuncList,EUsageType eUsageType);
 
 #ifdef LONG_TERM_REF_DUMP
 void dump_ref (sWelsEncCtx* ctx);
diff --git a/codec/encoder/core/inc/wels_func_ptr_def.h b/codec/encoder/core/inc/wels_func_ptr_def.h
index 42dfc361..7d36255b 100644
--- a/codec/encoder/core/inc/wels_func_ptr_def.h
+++ b/codec/encoder/core/inc/wels_func_ptr_def.h
@@ -168,6 +168,10 @@ typedef int32_t (*PGetVarianceFromIntraVaaFunc) (uint8_t* pSampelY, const int32_
 typedef uint8_t (*PGetMbSignFromInterVaaFunc) (int32_t* pSad8x8);
 typedef void (*PUpdateMbMvFunc) (SMVUnitXY* pMvUnit, const SMVUnitXY ksMv);
 
+typedef bool (*PBuildRefListFunc)(void* pCtx, const int32_t iPOC,int32_t iBestLtrRefIdx);
+typedef void (*PMarkPicFunc)(void* pCtx);
+typedef bool (*PUpdateRefListFunc) (void* pCtx);
+
 struct TagWelsFuncPointerList {
   PExpandPictureFunc			pfExpandLumaPicture;
   PExpandPictureFunc
@@ -247,6 +251,10 @@ struct TagWelsFuncPointerList {
   PSetMemoryZero				pfSetMemZeroSize8;			// for size is times to 8
   PSetMemoryZero				pfSetMemZeroSize64Aligned16;			// for size is times of 64, and address is align to 16
   PSetMemoryZero				pfSetMemZeroSize64;			// for size is times of 64, and don't know address is align to 16 or not
+
+  PBuildRefListFunc     pBuildRefList;
+  PMarkPicFunc          pMarkPic;
+  PUpdateRefListFunc    pUpdateRefList;
 };
 
 }	//end of namespace WelsSVCEnc {
diff --git a/codec/encoder/core/src/encoder.cpp b/codec/encoder/core/src/encoder.cpp
index c79fb334..48a72515 100644
--- a/codec/encoder/core/src/encoder.cpp
+++ b/codec/encoder/core/src/encoder.cpp
@@ -44,7 +44,7 @@
 #include "get_intra_predictor.h"
 
 #include "deblocking.h"
-
+#include "ref_list_mgr_svc.h"
 #include "mc.h"
 #include "sample.h"
 
@@ -207,7 +207,7 @@ int32_t InitFunctionPointers (SWelsFuncPtrList* pFuncList, SWelsSvcCodingParam*
   WelsBlockFuncInit (&pFuncList->pfSetNZCZero, uiCpuFlag);
 
   InitFillNeighborCacheInterFunc (pFuncList, pParam->bEnableBackgroundDetection);
-
+  InitRefListMgrFunc(pFuncList,pParam->iUsageType);
   return iReturn;
 }
 
diff --git a/codec/encoder/core/src/encoder_ext.cpp b/codec/encoder/core/src/encoder_ext.cpp
index ad9fd8ed..ec60ed03 100644
--- a/codec/encoder/core/src/encoder_ext.cpp
+++ b/codec/encoder/core/src/encoder_ext.cpp
@@ -2886,8 +2886,8 @@ int32_t WelsEncoderEncodeExt (sWelsEncCtx* pCtx, SFrameBSInfo * pFbi, const SSou
 
     WelsInitCurrentLayer (pCtx, iCurWidth, iCurHeight);
 
-    WelsMarkPic (pCtx);
-    if (!WelsBuildRefList (pCtx, pCtx->iPOC)) {
+    pCtx->pFuncList->pMarkPic(pCtx);
+    if (!pCtx->pFuncList->pBuildRefList (pCtx, pCtx->iPOC,0)) {
       // Force coding IDR as followed
       ForceCodingIDR (pCtx);
       WelsLog (pCtx, WELS_LOG_WARNING, "WelsEncoderEncodeExt(), WelsBuildRefList failed for P frames, pCtx->iNumRef0= %d. ForceCodingIDR!\n",
@@ -3139,7 +3139,7 @@ int32_t WelsEncoderEncodeExt (sWelsEncCtx* pCtx, SFrameBSInfo * pFbi, const SSou
 
     // reference picture list update
     if (eNalRefIdc != NRI_PRI_LOWEST) {
-      if (!WelsUpdateRefList (pCtx)) {
+      if (!pCtx->pFuncList->pUpdateRefList (pCtx)) {
         // Force coding IDR as followed
         ForceCodingIDR (pCtx);
         WelsLog (pCtx, WELS_LOG_WARNING, "WelsEncoderEncodeExt(), WelsUpdateRefList failed. ForceCodingIDR!\n");
diff --git a/codec/encoder/core/src/ref_list_mgr_svc.cpp b/codec/encoder/core/src/ref_list_mgr_svc.cpp
index d87fd4d0..5f683af4 100644
--- a/codec/encoder/core/src/ref_list_mgr_svc.cpp
+++ b/codec/encoder/core/src/ref_list_mgr_svc.cpp
@@ -324,7 +324,8 @@ static inline void PrefetchNextBuffer (sWelsEncCtx* pCtx) {
 /*
  *	update reference picture list
  */
-bool WelsUpdateRefList (sWelsEncCtx* pCtx) {
+bool WelsUpdateRefList (void* pEncCtx) {
+  sWelsEncCtx* pCtx     = (sWelsEncCtx*)pEncCtx;
   SRefList* pRefList		= pCtx->ppRefPicListExt[pCtx->uiDependencyId];
   SLTRState* pLtr			= &pCtx->pLtr[pCtx->uiDependencyId];
   SDLayerParam* pParamD	= &pCtx->pSvcParam->sDependencyLayers[pCtx->uiDependencyId];
@@ -423,7 +424,8 @@ bool CheckCurMarkFrameNumUsed (sWelsEncCtx* pCtx) {
 
   return true;
 }
-void WelsMarkPic (sWelsEncCtx* pCtx) {
+void WelsMarkPic (void* pEncCtx) {
+  sWelsEncCtx* pCtx = (sWelsEncCtx* )pEncCtx;
   SLTRState* pLtr = &pCtx->pLtr[pCtx->uiDependencyId];
   const int32_t kiCountSliceNum			= GetCurrentSliceNum (pCtx->pCurDqLayer->pSliceEncCtx);
   int32_t iGoPFrameNumInterval = ((pCtx->pSvcParam->uiGopSize >> 1) > 1) ? (pCtx->pSvcParam->uiGopSize >> 1) : (1);
@@ -536,7 +538,8 @@ void FilterLTRMarkingFeedback (sWelsEncCtx* pCtx, SLTRMarkingFeedback* pLTRMarki
 /*
  *	build reference picture list
  */
-bool WelsBuildRefList (sWelsEncCtx* pCtx, const int32_t iPOC) {
+bool WelsBuildRefList (void* pEncCtx, const int32_t iPOC,int32_t iBestLtrRefIdx) {
+  sWelsEncCtx* pCtx     = (sWelsEncCtx*)pEncCtx;
   SRefList* pRefList		=  pCtx->ppRefPicListExt[pCtx->uiDependencyId];
   SLTRState* pLtr			= &pCtx->pLtr[pCtx->uiDependencyId];
   const int32_t kiNumRef	= pCtx->pSvcParam->iNumRefFrame;
@@ -634,5 +637,32 @@ void WelsUpdateRefSyntax (sWelsEncCtx* pCtx, const int32_t iPOC, const int32_t u
     }
   }
 }
-
+bool WelsUpdateRefListScreen (void* pCtx)
+{
+  return true;
+}
+bool WelsBuildRefListScreen (void* pCtx, const int32_t iPOC,int32_t iBestLtrRefIdx)
+{
+  return true;
+}
+void WelsMarkPicScreen (void* pCtx)
+{
+  return;
+}
+void InitRefListMgrFunc(SWelsFuncPtrList* pFuncList,EUsageType eUsageType)
+{
+   if(eUsageType == SCREEN_CONTENT_REAL_TIME)
+   {
+     pFuncList->pBuildRefList =   WelsBuildRefListScreen;
+     pFuncList->pMarkPic      =   WelsMarkPicScreen;
+     pFuncList->pUpdateRefList=   WelsUpdateRefListScreen;
+   }
+   else
+   {
+     pFuncList->pBuildRefList =   WelsBuildRefList;
+     pFuncList->pMarkPic      =   WelsMarkPic;
+     pFuncList->pUpdateRefList=   WelsUpdateRefList;
+   }
+}
 } // namespace WelsSVCEnc
+