implement JVET-P0571 : CE5/CE8: Deblocking Filter for BDPCM coded block.

Detail
- Align SW with specification.
- Boundary strength for BDPCM is independently derived for each component.

source/Lib/CommonLib/LoopFilter.cpp

@@ -689,15 +689,23 @@ unsigned LoopFilter::xGetBoundaryStrengthSingle ( const CodingUnit& cu, const De
   const CodingUnit& cuQ = cu;
   const CodingUnit& cuP = *cu.cs->getCU( posP, cu.chType );
 
+#if !JVET_P0571_FIX_BS_BDPCM_CHROMA
   if( ( MODE_INTRA == cuP.predMode && cuP.bdpcmMode ) && ( MODE_INTRA == cuQ.predMode && cuQ.bdpcmMode ) )
   {
     return 0;
   }
+#endif
 
   //-- Set BS for Intra MB : BS = 4 or 3
   if( ( MODE_INTRA == cuP.predMode ) || ( MODE_INTRA == cuQ.predMode ) )
   {
+#if JVET_P0571_FIX_BS_BDPCM_CHROMA
+    int bsY = (MODE_INTRA == cuP.predMode && cuP.bdpcmMode) && (MODE_INTRA == cuQ.predMode && cuQ.bdpcmMode) ? 0 : 2;
+    int bsC = 2;
+    return (BsSet(bsY, COMPONENT_Y) + BsSet(bsC, COMPONENT_Cb) + BsSet(bsC, COMPONENT_Cr));
+#else
     return (BsSet(2, COMPONENT_Y) + BsSet(2, COMPONENT_Cb) + BsSet(2, COMPONENT_Cr));
+#endif
   }
 
   const TransformUnit& tuQ = *cuQ.cs->getTU(posQ, cuQ.chType);

source/Lib/CommonLib/TypeDef.h

@@ -49,6 +49,8 @@
 #include <cstring>
 #include <assert.h>
 #include <cassert>
+#define JVET_P0571_FIX_BS_BDPCM_CHROMA                    1 // JVET-P0571: align boundary strength for Chroma BDPCM
+
 #define JVET_P0983_REMOVE_SPS_SBT_MAX_SIZE_FLAG           1 // JVET-P0983/JVET-P0391: Remove sps_sbt_max_size_64_flag
 
 #define JVET_P0530_TPM_WEIGHT_ALIGN                       1 // JVET-P0530: align chroma weights with luma weights for TPM blending