UnitTools.cpp

  if( pu.refIdx[0] >= 0 )
  {
    int refPicWidth = pu.cu->slice->getRefPic( REF_PIC_LIST_0, pu.refIdx[0] )->getPicWidthInLumaSamples();
    int refPicHeight = pu.cu->slice->getRefPic( REF_PIC_LIST_0, pu.refIdx[0] )->getPicHeightInLumaSamples();

    samePicSize = refPicWidth == curPicWidth && refPicHeight == curPicHeight;
  }

  if( pu.refIdx[1] >= 0 )
  {
    int refPicWidth = pu.cu->slice->getRefPic( REF_PIC_LIST_1, pu.refIdx[1] )->getPicWidthInLumaSamples();
    int refPicHeight = pu.cu->slice->getRefPic( REF_PIC_LIST_1, pu.refIdx[1] )->getPicHeightInLumaSamples();

    samePicSize = samePicSize && ( refPicWidth == curPicWidth && refPicHeight == curPicHeight );
  }

  return samePicSize;
}