Merge branch 'IBCBuf_bug_fixed' into 'master'

Fix #976: IBC virtual buffer reset for large CUs

See merge request jvet/VVCSoftware_VTM!1484

source/Lib/DecoderLib/DecCu.cpp

@@ -122,7 +122,13 @@ void DecCu::decompressCtu( CodingStructure& cs, const UnitArea& ctuArea )
         const int vSize = cs.slice->getSPS()->getMaxCUHeight() > 64 ? 64 : cs.slice->getSPS()->getMaxCUHeight();
         if((currCU.Y().x % vSize) == 0 && (currCU.Y().y % vSize) == 0)
         {
-          m_pcInterPred->resetVPDUforIBC(cs.pcv->chrFormat, cs.slice->getSPS()->getMaxCUHeight(), vSize, currCU.Y().x  + g_IBCBufferSize / cs.slice->getSPS()->getMaxCUHeight() / 2, currCU.Y().y);
+          for(int x = currCU.Y().x; x < currCU.Y().y + currCU.Y().width; x += vSize)
+          {
+            for(int y = currCU.Y().y; y < currCU.Y().y + currCU.Y().height; y += vSize)
+            {
+              m_pcInterPred->resetVPDUforIBC(cs.pcv->chrFormat, cs.slice->getSPS()->getMaxCUHeight(), vSize, x + g_IBCBufferSize / cs.slice->getSPS()->getMaxCUHeight() / 2, y);
+            }
+          }
         }
       }
       if (currCU.predMode != MODE_INTRA && currCU.predMode != MODE_PLT && currCU.Y().valid())