HEVC學習（三十一） —— 去方塊濾波之二

這個是維護去方塊濾波參數的結構體：

/// parameters for deblocking filter
typedef struct _LFCUParam
{
  Bool bInternalEdge;                     ///< indicates internal edge
  Bool bLeftEdge;                         ///< indicates left edge
  Bool bTopEdge;                          ///< indicates top edge
} LFCUParam;

//! 該函數的功能是根據當前PU的位置、當前PU的鄰塊的存在性對其邊界是否進行相應濾波進行判斷
Void TComLoopFilter::xSetLoopfilterParam( TComDataCU* pcCU, UInt uiAbsZorderIdx )
{
  UInt uiX           = pcCU->getCUPelX() + g_auiRasterToPelX[ g_auiZscanToRaster[ uiAbsZorderIdx ] ];
  UInt uiY           = pcCU->getCUPelY() + g_auiRasterToPelY[ g_auiZscanToRaster[ uiAbsZorderIdx ] ];
  
  TComDataCU* pcTempCU;
  UInt        uiTempPartIdx;

  m_stLFCUParam.bInternalEdge = ! pcCU->getSlice()->getDeblockingFilterDisable(); //!< 標記邊界是否進行去方塊濾波
  
  if ( (uiX == 0) || pcCU->getSlice()->getDeblockingFilterDisable() )
  {
    m_stLFCUParam.bLeftEdge = false;
  }
  else
  {
    m_stLFCUParam.bLeftEdge = true;
  }
  if ( m_stLFCUParam.bLeftEdge )
  {
    pcTempCU = pcCU->getPULeft( uiTempPartIdx, uiAbsZorderIdx, !pcCU->getSlice()->getLFCrossSliceBoundaryFlag(), false, !m_bLFCrossTileBoundary);
    if ( pcTempCU ) //!< 只有在左鄰PU存在的情況下才進行垂直邊界的濾波
    {
      m_stLFCUParam.bLeftEdge = true;
    }
    else
    {
      m_stLFCUParam.bLeftEdge = false;
    }
  }
  
  if ( (uiY == 0 ) || pcCU->getSlice()->getDeblockingFilterDisable() )
  {
    m_stLFCUParam.bTopEdge = false;
  }
  else
  {
    m_stLFCUParam.bTopEdge = true;
  }
  if ( m_stLFCUParam.bTopEdge )
  {
#if LINEBUF_CLEANUP
    pcTempCU = pcCU->getPUAbove( uiTempPartIdx, uiAbsZorderIdx, !pcCU->getSlice()->getLFCrossSliceBoundaryFlag(), false , false, !m_bLFCrossTileBoundary);
#else
    pcTempCU = pcCU->getPUAbove( uiTempPartIdx, uiAbsZorderIdx, !pcCU->getSlice()->getLFCrossSliceBoundaryFlag(), false , false, false, !m_bLFCrossTileBoundary);
#endif

    if ( pcTempCU ) //!< 只有在上鄰PU存在的情況下才進行水平邊界的濾波
    {
      m_stLFCUParam.bTopEdge = true;
    }
    else
    {
      m_stLFCUParam.bTopEdge = false;
    }
  }
}