xcheckRDcostIntra

最新推荐文章于 2022-06-27 16:55:37 发布

原创最新推荐文章于 2022-06-27 16:55:37 发布 · 1k 阅读

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该段代码详细展示了HEVC编码器中用于进行内部模式（Intra）成本计算的xCheckRDCostIntra函数。函数通过设置CU的大小、预测模式、跳过标志、量化偏移等参数，进行预测、残差、熵编码等步骤，并计算成本。此过程在快速DeltaQP模式下会有所简化。

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Void TEncCu::xCheckRDCostIntra( TComDataCU *&rpcBestCU,
                                TComDataCU *&rpcTempCU,
                                Double      &cost,
                                PartSize     eSize
                                DEBUG_STRING_FN_DECLARE(sDebug) )
{
  DEBUG_STRING_NEW(sTest)

  if(getFastDeltaQp())
  {
    const TComSPS &sps=*(rpcTempCU->getSlice()->getSPS());
    const UInt fastDeltaQPCuMaxSize = Clip3(sps.getMaxCUHeight()>>(sps.getLog2DiffMaxMinCodingBlockSize()), sps.getMaxCUHeight(), 32u);
    if(rpcTempCU->getWidth( 0 ) > fastDeltaQPCuMaxSize)
    {
      return; // only check necessary 2Nx2N Intra in fast deltaqp mode
    }
  }

  UInt uiDepth = rpcTempCU->getDepth( 0 );

  rpcTempCU->setSkipFlagSubParts( false, 0, uiDepth );

  rpcTempCU->setPartSizeSubParts( eSize, 0, uiDepth );
  rpcTempCU->setPredModeSubParts( MODE_INTRA, 0, uiDepth );
  rpcTempCU->setChromaQpAdjSubParts( rpcTempCU->getCUTransquantBypass(0) ? 0 : m_cuChromaQpOffsetIdxPlus1, 0, uiDepth );

  Pel resiLuma[NUMBER_OF_STORED_RESIDUAL_TYPES][MAX_CU_SIZE * MAX_CU_SIZE];

  m_pcPredSearch->estIntraPredLumaQT( rpcTempCU, m_ppcOrigYuv[uiDepth], m_ppcPredYuvTemp[uiDepth], m_ppcResiYuvTemp[uiDepth], m_ppcRecoYuvTemp[uiDepth], resiLuma DEBUG_STRING_PASS_INTO(sTest) );

  m_ppcRecoYuvTemp[uiDepth]->copyToPicComponent(COMPONENT_Y, rpcTempCU->getPic()->getPicYuvRec(), rpcTempCU->getCtuRsAddr(), rpcTempCU->getZorderIdxInCtu() );

  if (rpcBestCU->getPic()->getChromaFormat()!=CHROMA_400)
  {
    m_pcPredSearch->estIntraPredChromaQT( rpcTempCU, m_ppcOrigYuv[uiDepth], m_ppcPredYuvTemp[uiDepth], m_ppcResiYuvTemp[uiDepth], m_ppcRecoYuvTemp[uiDepth], resiLuma DEBUG_STRING_PASS_INTO(sTest) );
  }

  m_pcEntropyCoder->resetBits();

  if ( rpcTempCU->getSlice()->getPPS()->getTransquantBypassEnableFlag())
  {
    m_pcEntropyCoder->encodeCUTransquantBypassFlag( rpcTempCU, 0,          true );
  }

  m_pcEntropyCoder->encodeSkipFlag ( rpcTempCU, 0,          true );
  m_pcEntropyCoder->encodePredMode( rpcTempCU, 0,          true );
  m_pcEntropyCoder->encodePartSize( rpcTempCU, 0, uiDepth, true );
  m_pcEntropyCoder->encodePredInfo( rpcTempCU, 0 );
  m_pcEntropyCoder->encodeIPCMInfo(rpcTempCU, 0, true );

  // Encode Coefficients
  Bool bCodeDQP = getdQPFlag();
  Bool codeChromaQpAdjFlag = getCodeChromaQpAdjFlag();
  m_pcEntropyCoder->encodeCoeff( rpcTempCU, 0, uiDepth, bCodeDQP, codeChromaQpAdjFlag );
  setCodeChromaQpAdjFlag( codeChromaQpAdjFlag );
  setdQPFlag( bCodeDQP );

  m_pcRDGoOnSbacCoder->store(m_pppcRDSbacCoder[uiDepth][CI_TEMP_BEST]);

  rpcTempCU->getTotalBits() = m_pcEntropyCoder->getNumberOfWrittenBits();
  rpcTempCU->getTotalBins() = ((TEncBinCABAC *)((TEncSbac*)m_pcEntropyCoder->m_pcEntropyCoderIf)->getEncBinIf())->getBinsCoded();
  rpcTempCU->getTotalCost() = m_pcRdCost->calcRdCost( rpcTempCU->getTotalBits(), rpcTempCU->getTotalDistortion() );

  xCheckDQP( rpcTempCU );

  cost = rpcTempCU->getTotalCost();

  xCheckBestMode(rpcBestCU, rpcTempCU, uiDepth DEBUG_STRING_PASS_INTO(sDebug) DEBUG_STRING_PASS_INTO(sTest));
}