JVET-R0130: Bugfix for tC derivation used in chroma deblocking filter.

source/Lib/CommonLib/LoopFilter.cpp

@@ -1305,7 +1305,12 @@ void LoopFilter::xEdgeFilterChroma(const CodingUnit& cu, const DeblockEdgeDir ed
 
 
         const int iIndexTC = Clip3<int>(0, MAX_QP + DEFAULT_INTRA_TC_OFFSET, iQP + DEFAULT_INTRA_TC_OFFSET * (bS[chromaIdx] - 1) + (tcOffsetDiv2[chromaIdx] << 1));
+#if JVET_R0130_TC_DERIVATION_BUGFIX
+        const int roundOffset = 1 << (sps.getBitDepth(CHANNEL_TYPE_CHROMA) - 1);
+        const int iTc = sps.getBitDepth(CHANNEL_TYPE_CHROMA) < 10 ? ((sm_tcTable[iIndexTC] + roundOffset) >> (10 - sps.getBitDepth(CHANNEL_TYPE_CHROMA))) : ((sm_tcTable[iIndexTC]) << (sps.getBitDepth(CHANNEL_TYPE_CHROMA) - 10));
+#else
         const int iTc = sps.getBitDepth(CHANNEL_TYPE_CHROMA) < 10 ? ((sm_tcTable[iIndexTC] + 2) >> (10 - sps.getBitDepth(CHANNEL_TYPE_CHROMA))) : ((sm_tcTable[iIndexTC]) << (sps.getBitDepth(CHANNEL_TYPE_CHROMA) - 10));
+#endif
         bool useLongFilter = false;
         if (largeBoundary)
         {