deriveLeftBottomIdx 1474 source/common/cudata.cpp     uint32_t partIdxLT, partIdxRT, partIdxLB = deriveLeftBottomIdx(puIdx);
deriveLeftBottomIdx 1812 source/common/cudata.cpp     uint32_t partIdxLT, partIdxRT, partIdxLB = deriveLeftBottomIdx(puIdx);
deriveLeftBottomIdx  332 source/common/cudata.h     uint32_t deriveLeftBottomIdx(uint32_t puIdx) const;