HEVC-初始化估计数据(帧间帧内)

最新推荐文章于 2021-06-29 21:43:52 发布

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/** initialize prediction data with enabling sub-LCU-level delta QP
*\param  uiDepth  depth of the current CU
*\param  qp     qp for the current CU
*- set CU width and CU height according to depth
*- set qp value according to input qp 
*- set last-coded qp value according to input last-coded qp 
*/
Void TComDataCU::initEstData( UInt uiDepth, Int qp )
{
  m_dTotalCost         = MAX_DOUBLE;//double 类型成员函数 总的分割代价sum of partition RD costs
  m_uiTotalDistortion  = 0;         //无符号int 类型变量  总的分割失真sum of partition distortion
  m_uiTotalBits        = 0;         //sum of partition bits  bits是编码后的比特数
  m_uiTotalBins        = 0;         //sum of partition bins  bin是句法元素的二进制位数


  UChar uhWidth  = g_uiMaxCUWidth  >> uiDepth;
  UChar uhHeight = g_uiMaxCUHeight >> uiDepth;

  for (UInt ui = 0; ui < m_uiNumPartition; ui++)//64x64/4x4=256
  {
	  if(getPic()->getPicSym()->getInverseCUOrderMap(getAddr())*m_pcPic->getNumPartInCU()+m_uiAbsIdxInLCU+ui >= getSlice()->getSliceSegmentCurStartCUAddr())
    {
	  //Char*  m_apiMVPIdx[2]; ///< array of motion vector predictor candidates
	  //Char*  m_apiMVPNum[2]; ///< array of number of possible motion vectors predictors单向预测和双向预测  	
	  m_apiMVPIdx[0][ui] = -1;
      m_apiMVPIdx[1][ui] = -1;
      m_apiMVPNum[0][ui] = -1;
      m_apiMVPNum[1][ui] = -1;
      m_puhDepth  [ui] = uiDepth;
      m_puhWidth  [ui] = uhWidth;
      m_puhHeight [ui] = uhHeight;
      m_puhTrIdx  [ui] = 0;
      //UChar* m_puhTransformSkip[3];///< array of transform skipping flags 
	  m_puhTransformSkip[0][ui] = 0;//QP for Y
      m_puhTransformSkip[1][ui] = 0;//QP forCb
      m_puhTransformSkip[2][ui] = 0;//QP forCr from JCTVC-L1003_v34.doc 8.6.2	Scaling and transformation process
      m_skipFlag[ui]   = false;
      m_pePartSize[ui] = SIZE_NONE; // SIZE_NONE=15 不支持帧内帧间分割模式
      m_pePredMode[ui] = MODE_NONE; // MODE_NONE = 15 不是帧内帧间预测模式
      m_CUTransquantBypass[ui] = false;
      m_pbIPCMFlag[ui] = 0;
      m_phQP[ui] = qp;
      m_pbMergeFlag[ui] = 0;
      m_puhMergeIndex[ui] = 0;
      m_puhLumaIntraDir[ui] = DC_IDX;//#define DC_IDX  1  //index for intra DC mode
      m_puhChromaIntraDir[ui] = 0;
      m_puhInterDir[ui] = 0;
      //UChar*   m_puhCbf[3];  ///< array of coded block flags (CBF)
	  m_puhCbf[0][ui] = 0;
      m_puhCbf[1][ui] = 0;
      m_puhCbf[2][ui] = 0;
    }
  }

  UInt uiTmp = uhWidth*uhHeight;

  if(getPic()->getPicSym()->getInverseCUOrderMap(getAddr())*m_pcPic->getNumPartInCU()+m_uiAbsIdxInLCU >= getSlice()->getSliceSegmentCurStartCUAddr())
  {
    m_acCUMvField[0].clearMvField();
    m_acCUMvField[1].clearMvField();
    uiTmp = uhWidth*uhHeight;
    
	//亮度采样系数缓冲器 3种
    memset( m_pcTrCoeffY,    0, uiTmp * sizeof( *m_pcTrCoeffY    ) );
#if ADAPTIVE_QP_SELECTION
    memset( m_pcArlCoeffY ,  0, uiTmp * sizeof( *m_pcArlCoeffY   ) );
#endif
    memset( m_pcIPCMSampleY, 0, uiTmp * sizeof( *m_pcIPCMSampleY ) );

	//色度采样系统缓冲器 3种
    uiTmp>>=2;//除以4，对于色度长宽各减半
	//Tr:transformed变换后的
    memset( m_pcTrCoeffCb,    0, uiTmp * sizeof( *m_pcTrCoeffCb    ) );
    memset( m_pcTrCoeffCr,    0, uiTmp * sizeof( *m_pcTrCoeffCr    ) );
#if ADAPTIVE_QP_SELECTION  
	//采用自适应QP选择 ARL:Adaptive Reconstruction Level
    memset( m_pcArlCoeffCb,   0, uiTmp * sizeof( *m_pcArlCoeffCb   ) );
    memset( m_pcArlCoeffCr,   0, uiTmp * sizeof( *m_pcArlCoeffCr   ) );
#endif                 
	//采用PCM模式进行色度采样
    memset( m_pcIPCMSampleCb, 0, uiTmp * sizeof( *m_pcIPCMSampleCb ) );
    memset( m_pcIPCMSampleCr, 0, uiTmp * sizeof( *m_pcIPCMSampleCr ) );
  }
}