UnitTools.cpp

  return ( isChroma(compID) && tu.cs->pps->getPpsRangeExtension().getCrossComponentPredictionEnabledFlag() && TU::getCbf( tu, COMPONENT_Y ) &&
         ( CU::isInter(*tu.cu) || PU::isChromaIntraModeCrossCheckMode( *tu.cs->getPU( tu.blocks[compID].pos(), toChannelType( compID ) ) ) ) );
}

uint32_t TU::getNumNonZeroCoeffsNonTS( const TransformUnit& tu, const bool bLuma, const bool bChroma )
{
  uint32_t count = 0;
  for( uint32_t i = 0; i < ::getNumberValidTBlocks( *tu.cs->pcv ); i++ )
  {
    if( tu.blocks[i].valid() && !tu.transformSkip[i] && TU::getCbf( tu, ComponentID( i ) ) )
    {
      if( isLuma  ( tu.blocks[i].compID ) && !bLuma   ) continue;
      if( isChroma( tu.blocks[i].compID ) && !bChroma ) continue;

      uint32_t area = tu.blocks[i].area();
      const TCoeff* coeff = tu.getCoeffs( ComponentID( i ) ).buf;
      for( uint32_t j = 0; j < area; j++ )
      {
        count += coeff[j] != 0;
      }
    }
  }
  return count;
}

bool TU::needsSqrt2Scale( const Size& size )
{
  return (((g_aucLog2[size.width] + g_aucLog2[size.height]) & 1) == 1);
}

#if HM_QTBT_AS_IN_JEM_QUANT

bool TU::needsBlockSizeTrafoScale( const Size& size )
{
  return needsSqrt2Scale( size ) || isNonLog2BlockSize( size );
}
#else
bool TU::needsQP3Offset(const TransformUnit &tu, const ComponentID &compID)
{
  if( tu.cs->pcv->rectCUs && !tu.transformSkip[compID] )
  {
    return ( ( ( g_aucLog2[tu.blocks[compID].width] + g_aucLog2[tu.blocks[compID].height] ) & 1 ) == 1 );
  }
  return false;
}
#endif





// other tools

uint32_t getCtuAddr( const Position& pos, const PreCalcValues& pcv )
{
  return ( pos.x >> pcv.maxCUWidthLog2 ) + ( pos.y >> pcv.maxCUHeightLog2 ) * pcv.widthInCtus;
}