Void TComPicYuv::create

Void TComPicYuv::create ( const Int picWidth,                 ///< picture width
                          const Int picHeight,                ///< picture height
                          const ChromaFormat chromaFormatIDC, ///< chroma format
                          const UInt maxCUWidth,              ///< used for generating offsets to CUs.
                          const UInt maxCUHeight,             ///< used for generating offsets to CUs.
                          const UInt maxCUDepth,              ///< used for generating offsets to CUs.
                          const Bool bUseMargin)              ///< if true, then a margin of uiMaxCUWidth+16 and uiMaxCUHeight+16 is created around the image.

{
  createWithoutCUInfo(picWidth, picHeight, chromaFormatIDC, bUseMargin, maxCUWidth, maxCUHeight);


  const Int numCuInWidth  = m_picWidth  / maxCUWidth  + (m_picWidth  % maxCUWidth  != 0);//一幅圖像中，一行分成的塊數
  const Int numCuInHeight = m_picHeight / maxCUHeight + (m_picHeight % maxCUHeight != 0);//一幅圖像中，一列分成的塊數

  for(Int chan=0; chan<MAX_NUM_CHANNEL_TYPE; chan++)
  {
    const ChannelType ch= ChannelType(chan);
    const Int ctuHeight = maxCUHeight>>getChannelTypeScaleY(ch);
    const Int ctuWidth  = maxCUWidth>>getChannelTypeScaleX(ch);
    const Int stride    = getStride(ch);

    m_ctuOffsetInBuffer[chan] = new Int[numCuInWidth * numCuInHeight];

    for (Int cuRow = 0; cuRow < numCuInHeight; cuRow++)
    {
      for (Int cuCol = 0; cuCol < numCuInWidth; cuCol++)
      {
        m_ctuOffsetInBuffer[chan][cuRow * numCuInWidth + cuCol] = stride * cuRow * ctuHeight + cuCol * ctuWidth;//CU按Z形掃描的位置
      }
    }

    m_subCuOffsetInBuffer[chan] = new Int[(size_t)1 << (2 * maxCUDepth)];

    const Int numSubBlockPartitions=(1<<maxCUDepth);
    const Int minSubBlockHeight    =(ctuHeight >> maxCUDepth);
    const Int minSubBlockWidth     =(ctuWidth  >> maxCUDepth);

    for (Int buRow = 0; buRow < numSubBlockPartitions; buRow++)
    {
      for (Int buCol = 0; buCol < numSubBlockPartitions; buCol++)
      {
        m_subCuOffsetInBuffer[chan][(buRow << maxCUDepth) + buCol] = stride  * buRow * minSubBlockHeight + buCol * minSubBlockWidth;
      }
    }
  }
}