C++ TComSlice::getSliceSegmentCurStartCtuTsAddr方法代码示例

Void TDecSlice::decompressSlice(TComInputBitstream** ppcSubstreams, TComPic* pcPic, TDecSbac* pcSbacDecoder)
{
  TComSlice* pcSlice                 = pcPic->getSlice(pcPic->getCurrSliceIdx());

  const Int  startCtuTsAddr          = pcSlice->getSliceSegmentCurStartCtuTsAddr();
  const Int  startCtuRsAddr          = pcPic->getPicSym()->getCtuTsToRsAddrMap(startCtuTsAddr);
  const UInt numCtusInFrame          = pcPic->getNumberOfCtusInFrame();

  const UInt frameWidthInCtus        = pcPic->getPicSym()->getFrameWidthInCtus();
  const Bool depSliceSegmentsEnabled = pcSlice->getPPS()->getDependentSliceSegmentsEnabledFlag();
  const Bool wavefrontsEnabled       = pcSlice->getPPS()->getEntropyCodingSyncEnabledFlag();

  m_pcEntropyDecoder->setEntropyDecoder ( pcSbacDecoder  );
  m_pcEntropyDecoder->setBitstream      ( ppcSubstreams[0] );
  m_pcEntropyDecoder->resetEntropy      (pcSlice);

  // decoder doesn't need prediction & residual frame buffer
  pcPic->setPicYuvPred( 0 );
  pcPic->setPicYuvResi( 0 );

#if ENC_DEC_TRACE
  g_bJustDoIt = g_bEncDecTraceEnable;
#endif
  DTRACE_CABAC_VL( g_nSymbolCounter++ );
  DTRACE_CABAC_T( "\tPOC: " );
  DTRACE_CABAC_V( pcPic->getPOC() );
  DTRACE_CABAC_T( "\n" );

#if ENC_DEC_TRACE
  g_bJustDoIt = g_bEncDecTraceDisable;
#endif

  // The first CTU of the slice is the first coded substream, but the global substream number, as calculated by getSubstreamForCtuAddr may be higher.
  // This calculates the common offset for all substreams in this slice.
  const UInt subStreamOffset=pcPic->getSubstreamForCtuAddr(startCtuRsAddr, true, pcSlice);


  if (depSliceSegmentsEnabled)
  {
    // modify initial contexts with previous slice segment if this is a dependent slice.
    const UInt startTileIdx=pcPic->getPicSym()->getTileIdxMap(startCtuRsAddr);
    const TComTile *pCurrentTile=pcPic->getPicSym()->getTComTile(startTileIdx);
    const UInt firstCtuRsAddrOfTile = pCurrentTile->getFirstCtuRsAddr();

    if( pcSlice->getDependentSliceSegmentFlag() && startCtuRsAddr != firstCtuRsAddrOfTile)
    {
      if ( pCurrentTile->getTileWidthInCtus() >= 2 || !wavefrontsEnabled)
      {
        pcSbacDecoder->loadContexts(&m_lastSliceSegmentEndContextState);
      }
    }
  }

  // for every CTU in the slice segment...

  Bool isLastCtuOfSliceSegment = false;
  for( UInt ctuTsAddr = startCtuTsAddr; !isLastCtuOfSliceSegment && ctuTsAddr < numCtusInFrame; ctuTsAddr++)
  {
    const UInt ctuRsAddr = pcPic->getPicSym()->getCtuTsToRsAddrMap(ctuTsAddr);
    const TComTile &currentTile = *(pcPic->getPicSym()->getTComTile(pcPic->getPicSym()->getTileIdxMap(ctuRsAddr)));
    const UInt firstCtuRsAddrOfTile = currentTile.getFirstCtuRsAddr();
    const UInt tileXPosInCtus = firstCtuRsAddrOfTile % frameWidthInCtus;
    const UInt tileYPosInCtus = firstCtuRsAddrOfTile / frameWidthInCtus;
    const UInt ctuXPosInCtus  = ctuRsAddr % frameWidthInCtus;
    const UInt ctuYPosInCtus  = ctuRsAddr / frameWidthInCtus;
    const UInt uiSubStrm=pcPic->getSubstreamForCtuAddr(ctuRsAddr, true, pcSlice)-subStreamOffset;
    TComDataCU* pCtu = pcPic->getCtu( ctuRsAddr );
    pCtu->initCtu( pcPic, ctuRsAddr );

    m_pcEntropyDecoder->setBitstream( ppcSubstreams[uiSubStrm] );

    // set up CABAC contexts' state for this CTU
    if (ctuRsAddr == firstCtuRsAddrOfTile)
    {
      if (ctuTsAddr != startCtuTsAddr) // if it is the first CTU, then the entropy coder has already been reset
      {
        m_pcEntropyDecoder->resetEntropy(pcSlice);
      }
    }
    else if (ctuXPosInCtus == tileXPosInCtus && wavefrontsEnabled)
    {
      // Synchronize cabac probabilities with upper-right CTU if it's available and at the start of a line.
      if (ctuTsAddr != startCtuTsAddr) // if it is the first CTU, then the entropy coder has already been reset
      {
        m_pcEntropyDecoder->resetEntropy(pcSlice);
      }
      TComDataCU *pCtuUp = pCtu->getCtuAbove();
      if ( pCtuUp && ((ctuRsAddr%frameWidthInCtus+1) < frameWidthInCtus)  )
      {
        TComDataCU *pCtuTR = pcPic->getCtu( ctuRsAddr - frameWidthInCtus + 1 );
        if ( pCtu->CUIsFromSameSliceAndTile(pCtuTR) )
        {
          // Top-right is available, so use it.
          pcSbacDecoder->loadContexts( &m_entropyCodingSyncContextState );
        }
      }
    }

#if ENC_DEC_TRACE
    g_bJustDoIt = g_bEncDecTraceEnable;
//.........这里部分代码省略.........

//.........这里部分代码省略.........
            //rewind the trace counter since we didn't actually decode the slice
            g_nSymbolCounter = originalSymbolCount;
#endif
            return true;
        }
        m_prevPOC = m_apcSlicePilot->getPOC();
    }

    //detect lost reference picture and insert copy of earlier frame.
    {
        Int lostPoc;
        while((lostPoc=m_apcSlicePilot->checkThatAllRefPicsAreAvailable(m_cListPic, m_apcSlicePilot->getRPS(), true, m_pocRandomAccess)) > 0)
        {
            xCreateLostPicture(lostPoc-1);
        }
    }

    if (!m_apcSlicePilot->getDependentSliceSegmentFlag())
    {
        m_prevPOC = m_apcSlicePilot->getPOC();
    }

    // actual decoding starts here
    xActivateParameterSets();

    m_bFirstSliceInSequence = false;
    m_bFirstSliceInBitstream  = false;


    TComSlice* pcSlice = m_pcPic->getPicSym()->getSlice(m_uiSliceIdx);

    // When decoding the slice header, the stored start and end addresses were actually RS addresses, not TS addresses.
    // Now, having set up the maps, convert them to the correct form.
    pcSlice->setSliceSegmentCurStartCtuTsAddr( m_pcPic->getPicSym()->getCtuRsToTsAddrMap(pcSlice->getSliceSegmentCurStartCtuTsAddr()) );
    pcSlice->setSliceSegmentCurEndCtuTsAddr( m_pcPic->getPicSym()->getCtuRsToTsAddrMap(pcSlice->getSliceSegmentCurEndCtuTsAddr()) );
    if(!pcSlice->getDependentSliceSegmentFlag())
    {
        pcSlice->setSliceCurStartCtuTsAddr(m_pcPic->getPicSym()->getCtuRsToTsAddrMap(pcSlice->getSliceCurStartCtuTsAddr()));
        pcSlice->setSliceCurEndCtuTsAddr(m_pcPic->getPicSym()->getCtuRsToTsAddrMap(pcSlice->getSliceCurEndCtuTsAddr()));
    }

    m_pcPic->setTLayer(nalu.m_temporalId);

    if (!pcSlice->getDependentSliceSegmentFlag())
    {
        pcSlice->checkCRA(pcSlice->getRPS(), m_pocCRA, m_associatedIRAPType, m_cListPic );
        // Set reference list
        pcSlice->setRefPicList( m_cListPic, true );

        // For generalized B
        // note: maybe not existed case (always L0 is copied to L1 if L1 is empty)
        if (pcSlice->isInterB() && pcSlice->getNumRefIdx(REF_PIC_LIST_1) == 0)
        {
            Int iNumRefIdx = pcSlice->getNumRefIdx(REF_PIC_LIST_0);
            pcSlice->setNumRefIdx        ( REF_PIC_LIST_1, iNumRefIdx );

            for (Int iRefIdx = 0; iRefIdx < iNumRefIdx; iRefIdx++)
            {
                pcSlice->setRefPic(pcSlice->getRefPic(REF_PIC_LIST_0, iRefIdx), REF_PIC_LIST_1, iRefIdx);
            }
        }
        if (!pcSlice->isIntra())
        {
            Bool bLowDelay = true;
            Int  iCurrPOC  = pcSlice->getPOC();
            Int iRefIdx = 0;