HEVC代码追踪（十一。三）:运动估计/补偿之xMotionEstimation

//!< 运动估计(基本思想就是用TZSearch算法先进行整像素搜索，确定一个局部的最佳值，然后以这个最佳点为中心再进行精度更高的分像素搜索。)
Void TEncSearch::xMotionEstimation( TComDataCU* pcCU, 
	                                TComYuv* pcYuvOrg, 
									Int iPartIdx, 
									RefPicList eRefPicList, 
									TComMv* pcMvPred, 
									Int iRefIdxPred, 
									TComMv& rcMv, 
									UInt& ruiBits, 
									UInt& ruiCost, 
									Bool bBi  )
{
  UInt          uiPartAddr;
  Int           iRoiWidth;
  Int           iRoiHeight;
  
  TComMv        cMvHalf, cMvQter;
  TComMv        cMvSrchRngLT;
  TComMv        cMvSrchRngRB;
  
  TComYuv*      pcYuv = pcYuvOrg;

  m_iSearchRange = m_aaiAdaptSR[eRefPicList][iRefIdxPred];//!< 根据参考帧列表类型、参考帧序号自适应设置搜索范围  
  
  Int           iSrchRng      = ( bBi ? m_bipredSearchRange : m_iSearchRange ); //!< 根据是否是双向预测设置搜索范围  
  TComPattern*  pcPatternKey  = pcCU->getPattern        ();//!< 用于获取neighbor的信息
  
  Double        fWeight       = 1.0;
  
  pcCU->getPartIndexAndSize( iPartIdx, uiPartAddr, iRoiWidth, iRoiHeight );//!< 获取PU的地址，宽度和高度  
  
  if ( bBi )
  {
    TComYuv*  pcYuvOther = &m_acYuvPred[1-(Int)eRefPicList];
    pcYuv                = &m_cYuvPredTemp;
    
    pcYuvOrg->copyPartToPartYuv( pcYuv, uiPartAddr, iRoiWidth, iRoiHeight );
    
    pcYuv->removeHighFreq( pcYuvOther, uiPartAddr, iRoiWidth, iRoiHeight );
    
    fWeight = 0.5;
  }
  
  //  Search key pattern initialization
  pcPatternKey->initPattern( pcYuv->getLumaAddr( uiPartAddr ),
                            pcYuv->getCbAddr  ( uiPartAddr ),
                            pcYuv->getCrAddr  ( uiPartAddr ),
                            iRoiWidth,
                            iRoiHeight,
                            pcYuv->getStride(),
                            0, 0 );//!< 设置待搜索的PU的相关参数，首地址，宽度，高度，跨度等  
 //!< 获取参考图像首地址和跨度（已编码的） 
  Pel*        piRefY      = pcCU->getSlice()->getRefPic( eRefPicList, iRefIdxPred )->getPicYuvRec()->getLumaAddr( pcCU->getAddr(), pcCU->getZorderIdxInCU() + uiPartAddr );
  Int         iRefStride  = pcCU->getSlice()->getRefPic( eRefPicList, iRefIdxPred )->getPicYuvRec()->getStride();
    	
  /***************************************************************
	
	cout<<"iRoiWidth = "<