HEVC代码追踪（二）:encode

// ====================================================================================================================
// Public member functions
// ====================================================================================================================

/**
 - create internal class
 - initialize internal variable
 - until the end of input YUV file, call encoding function in TEncTop class
 - delete allocated buffers
 - destroy internal class
 .
 */
Void TAppEncTop::encode()
{
  fstream bitstreamFile(m_pchBitstreamFile, fstream::binary | fstream::out);
  if (!bitstreamFile)
  {
    fprintf(stderr, "\nfailed to open bitstream file `%s' for writing\n", m_pchBitstreamFile);
    exit(EXIT_FAILURE);
  }

  TComPicYuv*       pcPicYuvOrg = new TComPicYuv;	//使用new在运行阶段分配未命名的内存来存储值
  TComPicYuv*       pcPicYuvRec = NULL;
  // initialize internal class & member variables
  xInitLibCfg();
  xCreateLib();
  xInitLib(m_isField);
  
  // main encoder loop
  Int   iNumEncoded = 0;
  Bool  bEos = false;
  
  list<AccessUnit> outputAccessUnits; ///< list of access units to write out.  is populated by the encoding process

  // allocate original YUV buffer（分配原始YUV缓冲区）
  if( m_isField )
  {
    pcPicYuvOrg->create( m_iSourceWidth, m_iSourceHeightOrg, m_uiMaxCUWidth, m_uiMaxCUHeight, m_uiMaxCUDepth );
  }
  else
  {
    pcPicYuvOrg->create( m_iSourceWidth, m_iSourceHeight, m_uiMaxCUWidth, m_uiMaxCUHeight, m_uiMaxCUDepth );
  }
  
  while ( !bEos )
  {
    // get buffers
    xGetBuffer(pcPicYuvRec);

    // read input YUV file
    m_cTVideoIOYuvInputFile.read( pcPicYuvOrg, m_aiPad );

    // increase number of received frames
    m_iFrameRcvd++;
    
    bEos = (m_isField && (m_iFrameRcvd == (m_framesToBeEncoded >> 1) )) || ( !m_isField && (m_iFrameRcvd == m_framesToBeEncoded) );
    Bool flush = 0;
    // if end of file (which is only detected on a read failure) flush the encoder of any queued pictures
    if (m_cTVideoIOYuvInputFile.isEof())
    {
      flush = true;
      bEos = true;
      m_iFrameRcvd--;
      m_cTEncTop.setFramesToBeEncoded(m_iFrameRcvd);
    }

    // call encoding function for one frame
    if ( m_isField )
    {
      m_cTEncTop.encode( bEos, flush ? 0 : pcPicYuvOrg, m_cListPicYuvRec, outputAccessUnits, iNumEncoded, m_isTopFieldFirst);
    }
    else
    {
      m_cTEncTop.encode( bEos, flush ? 0 : pcPicYuvOrg, m_cListPicYuvRec, outputAccessUnits, iNumEncoded );
    }
    
    // write bistream to file if necessary
    if ( iNumEncoded > 0 )
    {
      xWriteOutput(bitstreamFile, iNumEncoded, outputAccessUnits);
      outputAccessUnits.clear();
    }
  }

  m_cTEncTop.printSummary(m_isField);

  // delete original YUV buffer
  pcPicYuvOrg->destroy();
  delete pcPicYuvOrg;	//使用delete释放内存（只能用delete来释放使用new分配的内存）
  pcPicYuvOrg = NULL;
  
  // delete used buffers in encoder class
  m_cTEncTop.deletePicBuffer();
  
  // delete buffers & classes
  xDeleteBuffer();
  xDestroyLib();
  
  printRateSummary();

  return;
}