DecLib.cpp

/* The copyright in this software is being made available under the BSD
 * License, included below. This software may be subject to other third party
 * and contributor rights, including patent rights, and no such rights are
 * granted under this license.
 *
 * Copyright (c) 2010-2019, ITU/ISO/IEC
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *  * Neither the name of the ITU/ISO/IEC nor the names of its contributors may
 *    be used to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

/** \file     DecLib.cpp
    \brief    decoder class
*/

#include "NALread.h"
#include "DecLib.h"

#include "CommonLib/dtrace_next.h"
#include "CommonLib/dtrace_buffer.h"
#include "CommonLib/Buffer.h"
#include "CommonLib/UnitTools.h"

#include <fstream>
#include <stdio.h>
#include <fcntl.h>
#include "AnnexBread.h"
#include "NALread.h"
#if K0149_BLOCK_STATISTICS
#include "CommonLib/dtrace_blockstatistics.h"
#endif

#if RExt__DECODER_DEBUG_TOOL_STATISTICS
#include "CommonLib/CodingStatistics.h"
#endif

bool tryDecodePicture( Picture* pcEncPic, const int expectedPoc, const std::string& bitstreamFileName, bool bDecodeUntilPocFound /* = false */, int debugCTU /* = -1*/, int debugPOC /* = -1*/ )
{
  int      poc;
  PicList* pcListPic = NULL;

  static bool bFirstCall      = true;             /* TODO: MT */
  static bool loopFiltered    = false;            /* TODO: MT */
  static int  iPOCLastDisplay = -MAX_INT;         /* TODO: MT */

  static std::ifstream* bitstreamFile = nullptr;  /* TODO: MT */
  static InputByteStream* bytestream  = nullptr;  /* TODO: MT */
  bool bRet = false;

  // create & initialize internal classes
  static DecLib *pcDecLib = nullptr;              /* TODO: MT */

  if( pcEncPic )
  {
    if( bFirstCall )
    {
      bitstreamFile = new std::ifstream( bitstreamFileName.c_str(), std::ifstream::in | std::ifstream::binary );
      bytestream    = new InputByteStream( *bitstreamFile );

      CHECK( !*bitstreamFile, "failed to open bitstream file " << bitstreamFileName.c_str() << " for reading" ) ;
      // create decoder class
      pcDecLib = new DecLib;
      pcDecLib->create();

      // initialize decoder class
      pcDecLib->init(
#if  JVET_J0090_MEMORY_BANDWITH_MEASURE
        ""
#endif
      );

      pcDecLib->setDebugCTU( debugCTU );
      pcDecLib->setDebugPOC( debugPOC );
      pcDecLib->setDecodedPictureHashSEIEnabled( true );

      bFirstCall = false;
      msg( INFO, "start to decode %s \n", bitstreamFileName.c_str() );
    }

    bool goOn = true;

    // main decoder loop
    while( !!*bitstreamFile && goOn )
    {
      /* location serves to work around a design fault in the decoder, whereby
       * the process of reading a new slice that is the first slice of a new frame
       * requires the DecApp::decode() method to be called again with the same
       * nal unit. */
      std::streampos location = bitstreamFile->tellg();
      AnnexBStats stats       = AnnexBStats();

      InputNALUnit nalu;
      byteStreamNALUnit( *bytestream, nalu.getBitstream().getFifo(), stats );

      // call actual decoding function
      bool bNewPicture = false;
      if( nalu.getBitstream().getFifo().empty() )
      {
        /* this can happen if the following occur:
         *  - empty input file
         *  - two back-to-back start_code_prefixes
         *  - start_code_prefix immediately followed by EOF
         */
        msg( ERROR, "Warning: Attempt to decode an empty NAL unit\n");
      }
      else
      {
        read( nalu );
        int iSkipFrame = 0;
        bNewPicture = pcDecLib->decode( nalu, iSkipFrame, iPOCLastDisplay );
        if( bNewPicture )
        {
          bitstreamFile->clear();
          /* location points to the current nalunit payload[1] due to the
            * need for the annexB parser to read three extra bytes.
            * [1] except for the first NAL unit in the file
            *     (but bNewPicture doesn't happen then) */
          bitstreamFile->seekg( location - std::streamoff( 3 ) );
          bytestream->reset();
        }
      }

      if( ( bNewPicture || !*bitstreamFile || nalu.m_nalUnitType == NAL_UNIT_EOS ) && !pcDecLib->getFirstSliceInSequence() )
      {
        if( !loopFiltered || *bitstreamFile )
        {
          pcDecLib->finishPictureLight( poc, pcListPic );

          if( pcListPic )
          {
            for( auto & pic : *pcListPic )
            {
              if( pic->poc == poc && (!bDecodeUntilPocFound || expectedPoc == poc ) )
              {
                CHECK( pcEncPic->slices.size() == 0, "at least one slice should be available" );

                CHECK( expectedPoc != poc, "mismatch in POC - check encoder configuration" );

                if( debugCTU < 0 || poc != debugPOC )
                {
                for( int i = 0; i < pic->slices.size(); i++ )
                {
                  if( pcEncPic->slices.size() <= i )
                  {
                    pcEncPic->slices.push_back( new Slice );
                    pcEncPic->slices.back()->initSlice();
                    pcEncPic->slices.back()->setPPS( pcEncPic->slices[0]->getPPS() );
                    pcEncPic->slices.back()->setSPS( pcEncPic->slices[0]->getSPS() );
                    pcEncPic->slices.back()->setPic( pcEncPic->slices[0]->getPic() );
                  }
                  pcEncPic->slices[i]->copySliceInfo( pic->slices[i], false );
                }
                }

                pcEncPic->cs->slice = pcEncPic->slices.back();

                if( debugCTU >= 0 && poc == debugPOC )
                {
                  pcEncPic->cs->initStructData();

                  pcEncPic->cs->copyStructure( *pic->cs, CH_L, true, true );

                  if( CS::isDualITree( *pcEncPic->cs ) )
                  {
                    pcEncPic->cs->copyStructure( *pic->cs, CH_C, true, true );
                  }

                  for( auto &cu : pcEncPic->cs->cus )
                  {
                    cu->slice = pcEncPic->cs->slice;
                  }
                }
                else
                {
                if ( pic->cs->sps->getSAOEnabledFlag() )
                {
                  pcEncPic->copySAO( *pic, 0 );
                }

                if( pic->cs->sps->getALFEnabledFlag() )
                {
                  std::copy(pic->getAlfCtbFilterIndexVec().begin(), pic->getAlfCtbFilterIndexVec().end(), pcEncPic->getAlfCtbFilterIndexVec().begin());
                  for( int compIdx = 0; compIdx < MAX_NUM_COMPONENT; compIdx++ )
                  {
                    std::copy( pic->getAlfCtuEnableFlag()[compIdx].begin(), pic->getAlfCtuEnableFlag()[compIdx].end(), pcEncPic->getAlfCtuEnableFlag()[compIdx].begin() );
                  }
                  pcEncPic->resizeAlfCtbFilterIndex(pic->cs->pcv->sizeInCtus);
                  memcpy( pcEncPic->getAlfCtbFilterIndex(), pic->getAlfCtbFilterIndex(), sizeof(short)*pic->cs->pcv->sizeInCtus );

#if JVET_O0090_ALF_CHROMA_FILTER_ALTERNATIVES_CTB
                  std::copy( pic->getAlfCtuAlternative(COMPONENT_Cb).begin(), pic->getAlfCtuAlternative(COMPONENT_Cb).end(), pcEncPic->getAlfCtuAlternative(COMPONENT_Cb).begin() );
                  std::copy( pic->getAlfCtuAlternative(COMPONENT_Cr).begin(), pic->getAlfCtuAlternative(COMPONENT_Cr).end(), pcEncPic->getAlfCtuAlternative(COMPONENT_Cr).begin() );

#endif
                  for( int i = 0; i < pic->slices.size(); i++ )
                  {
                    pcEncPic->slices[i]->setTileGroupNumAps(pic->slices[i]->getTileGroupNumAps());
                    pcEncPic->slices[i]->setAlfAPSs(pic->slices[i]->getTileGroupApsIdLuma());
                    pcEncPic->slices[i]->setAlfAPSs(pic->slices[i]->getAlfAPSs());
                    pcEncPic->slices[i]->setTileGroupApsIdChroma(pic->slices[i]->getTileGroupApsIdChroma());
                    pcEncPic->slices[i]->setTileGroupAlfEnabledFlag(COMPONENT_Y,  pic->slices[i]->getTileGroupAlfEnabledFlag(COMPONENT_Y));
                    pcEncPic->slices[i]->setTileGroupAlfEnabledFlag(COMPONENT_Cb, pic->slices[i]->getTileGroupAlfEnabledFlag(COMPONENT_Cb));
                    pcEncPic->slices[i]->setTileGroupAlfEnabledFlag(COMPONENT_Cr, pic->slices[i]->getTileGroupAlfEnabledFlag(COMPONENT_Cr));
                  }
                }

                pcDecLib->executeLoopFilters();
                if ( pic->cs->sps->getSAOEnabledFlag() )
                {
                  pcEncPic->copySAO( *pic, 1 );
                }

                pcEncPic->cs->copyStructure( *pic->cs, CH_L, true, true );

                if( CS::isDualITree( *pcEncPic->cs ) )
                {
                  pcEncPic->cs->copyStructure( *pic->cs, CH_C, true, true );
                }
                }
                goOn = false; // exit the loop return
                bRet = true;
                break;
              }
            }
          }
          // postpone loop filters
          if (!bRet)
          {
            pcDecLib->executeLoopFilters();
          }

          pcDecLib->finishPicture( poc, pcListPic, DETAILS );

          // write output
          if( ! pcListPic->empty())
          {
            PicList::iterator iterPic   = pcListPic->begin();
            int numPicsNotYetDisplayed = 0;
            int dpbFullness = 0;
            const SPS* activeSPS = (pcListPic->front()->cs->sps);
            uint32_t maxNrSublayers = activeSPS->getMaxTLayers();
            uint32_t numReorderPicsHighestTid = activeSPS->getNumReorderPics(maxNrSublayers-1);
            uint32_t maxDecPicBufferingHighestTid =  activeSPS->getMaxDecPicBuffering(maxNrSublayers-1);

            while (iterPic != pcListPic->end())
            {
              Picture* pcCurPic = *(iterPic);
              if(pcCurPic->neededForOutput && pcCurPic->getPOC() > iPOCLastDisplay)
              {
                numPicsNotYetDisplayed++;
                dpbFullness++;
              }
              else if(pcCurPic->referenced)
              {
                dpbFullness++;
              }
              iterPic++;
            }

            iterPic = pcListPic->begin();

            if (numPicsNotYetDisplayed>2)
            {
              iterPic++;
            }

            Picture* pcCurPic = *(iterPic);
            if( numPicsNotYetDisplayed>2 && pcCurPic->fieldPic ) //Field Decoding
            {
              THROW( "no field coding support ");
            }
            else if( !pcCurPic->fieldPic ) //Frame Decoding
            {
              iterPic = pcListPic->begin();

              while (iterPic != pcListPic->end())
              {
                pcCurPic = *(iterPic);

                if(pcCurPic->neededForOutput && pcCurPic->getPOC() > iPOCLastDisplay &&
                  (numPicsNotYetDisplayed >  numReorderPicsHighestTid || dpbFullness > maxDecPicBufferingHighestTid))
                {
                    numPicsNotYetDisplayed--;
                  if( ! pcCurPic->referenced )
                  {
                    dpbFullness--;
                  }
                  // update POC of display order
                  iPOCLastDisplay = pcCurPic->getPOC();

                  // erase non-referenced picture in the reference picture list after display
                  if( ! pcCurPic->referenced && pcCurPic->reconstructed )
                  {
                    pcCurPic->reconstructed = false;
                  }
                  pcCurPic->neededForOutput = false;
                }

                iterPic++;
              }
            }
          }


        }
        loopFiltered = ( nalu.m_nalUnitType == NAL_UNIT_EOS );
        if( nalu.m_nalUnitType == NAL_UNIT_EOS )
        {
          pcDecLib->setFirstSliceInSequence( true );
        }

      }
      else if( ( bNewPicture || !*bitstreamFile || nalu.m_nalUnitType == NAL_UNIT_EOS ) && pcDecLib->getFirstSliceInSequence() )
      {
        pcDecLib->setFirstSliceInPicture( true );
      }
    }
  }

  if( !bRet )
  {
    CHECK( bDecodeUntilPocFound, " decoding failed - check decodeBitstream2 parameter File: " << bitstreamFileName.c_str() );
    if( pcDecLib )
    {
      pcDecLib->destroy();
      pcDecLib->deletePicBuffer();
      delete pcDecLib;
      pcDecLib = nullptr;
    }
    bFirstCall   = true;
    loopFiltered = false;
    iPOCLastDisplay = -MAX_INT;

    if( bytestream )
    {
      delete bytestream;
      bytestream = nullptr;
    }

    if( bitstreamFile )
    {
      delete bitstreamFile;
      bitstreamFile = nullptr;
    }
  }

  return bRet;
}


//! \ingroup DecoderLib
//! \{

DecLib::DecLib()
  : m_iMaxRefPicNum(0)
  , m_associatedIRAPType(NAL_UNIT_INVALID)
  , m_pocCRA(0)
  , m_pocRandomAccess(MAX_INT)
  , m_lastRasPoc(MAX_INT)
  , m_cListPic()
  , m_parameterSetManager()
  , m_apcSlicePilot(NULL)
  , m_SEIs()
  , m_cIntraPred()
  , m_cInterPred()
  , m_cTrQuant()
  , m_cSliceDecoder()
  , m_cCuDecoder()
  , m_HLSReader()
  , m_seiReader()
  , m_cLoopFilter()
  , m_cSAO()
  , m_cReshaper()
#if JVET_J0090_MEMORY_BANDWITH_MEASURE
  , m_cacheModel()
#endif
  , m_pcPic(NULL)
  , m_prevPOC(MAX_INT)
  , m_prevTid0POC(0)
  , m_bFirstSliceInPicture(true)
  , m_bFirstSliceInSequence(true)
  , m_prevSliceSkipped(false)
  , m_skippedPOC(0)
  , m_bFirstSliceInBitstream(true)
  , m_lastPOCNoOutputPriorPics(-1)
  , m_isNoOutputPriorPics(false)
  , m_craNoRaslOutputFlag(false)
  , m_pDecodedSEIOutputStream(NULL)
  , m_decodedPictureHashSEIEnabled(false)
  , m_numberOfChecksumErrorsDetected(0)
  , m_warningMessageSkipPicture(false)
  , m_prefixSEINALUs()
  , m_debugPOC( -1 )
  , m_debugCTU( -1 )
{
#if ENABLE_SIMD_OPT_BUFFER
  g_pelBufOP.initPelBufOpsX86();
#endif
}

DecLib::~DecLib()
{
  while (!m_prefixSEINALUs.empty())
  {
    delete m_prefixSEINALUs.front();
    m_prefixSEINALUs.pop_front();
  }
}

void DecLib::create()
{
  m_apcSlicePilot = new Slice;
  m_uiSliceSegmentIdx = 0;
}

void DecLib::destroy()
{
  delete m_apcSlicePilot;
  m_apcSlicePilot = NULL;

  m_cSliceDecoder.destroy();
}

void DecLib::init(
#if JVET_J0090_MEMORY_BANDWITH_MEASURE
  const std::string& cacheCfgFileName
#endif
)
{
  m_cSliceDecoder.init( &m_CABACDecoder, &m_cCuDecoder );
#if JVET_J0090_MEMORY_BANDWITH_MEASURE
  m_cacheModel.create( cacheCfgFileName );
  m_cacheModel.clear( );
  m_cInterPred.cacheAssign( &m_cacheModel );
#endif
  DTRACE_UPDATE( g_trace_ctx, std::make_pair( "final", 1 ) );
}

void DecLib::deletePicBuffer ( )
{
  PicList::iterator  iterPic   = m_cListPic.begin();
  int iSize = int( m_cListPic.size() );

  for (int i = 0; i < iSize; i++ )
  {
    Picture* pcPic = *(iterPic++);
    pcPic->destroy();

    delete pcPic;
    pcPic = NULL;
  }
  m_cALF.destroy();
  m_cSAO.destroy();
  m_cLoopFilter.destroy();
#if JVET_J0090_MEMORY_BANDWITH_MEASURE
  m_cacheModel.reportSequence( );
  m_cacheModel.destroy( );
#endif
  m_cCuDecoder.destoryDecCuReshaprBuf();
  m_cReshaper.destroy();
}

Picture* DecLib::xGetNewPicBuffer ( const SPS &sps, const PPS &pps, const uint32_t temporalLayer )
{
  Picture * pcPic = nullptr;
  m_iMaxRefPicNum = sps.getMaxDecPicBuffering(temporalLayer);     // m_uiMaxDecPicBuffering has the space for the picture currently being decoded
  if (m_cListPic.size() < (uint32_t)m_iMaxRefPicNum)
  {
    pcPic = new Picture();

#if JVET_O1164_PS
    pcPic->create( sps.getChromaFormatIdc(), Size( pps.getPicWidthInLumaSamples(), pps.getPicHeightInLumaSamples() ), sps.getMaxCUWidth(), sps.getMaxCUWidth() + 16, true );
#else
    pcPic->create( sps.getChromaFormatIdc(), Size( sps.getPicWidthInLumaSamples(), sps.getPicHeightInLumaSamples() ), sps.getMaxCUWidth(), sps.getMaxCUWidth() + 16, true );
#endif

    m_cListPic.push_back( pcPic );

    return pcPic;
  }

  bool bBufferIsAvailable = false;
  for(auto * p: m_cListPic)
  {
    pcPic = p;  // workaround because range-based for-loops don't work with existing variables
    if ( pcPic->reconstructed == false && ! pcPic->neededForOutput )
    {
      pcPic->neededForOutput = false;
      bBufferIsAvailable = true;
      break;
    }

    if( ! pcPic->referenced  && ! pcPic->neededForOutput )
    {
      pcPic->neededForOutput = false;
      pcPic->reconstructed = false;
      bBufferIsAvailable = true;
      break;
    }
  }

  if( ! bBufferIsAvailable )
  {
    //There is no room for this picture, either because of faulty encoder or dropped NAL. Extend the buffer.
    m_iMaxRefPicNum++;

    pcPic = new Picture();

    m_cListPic.push_back( pcPic );

#if JVET_O1164_PS
    pcPic->create( sps.getChromaFormatIdc(), Size( pps.getPicWidthInLumaSamples(), pps.getPicHeightInLumaSamples() ), sps.getMaxCUWidth(), sps.getMaxCUWidth() + 16, true );
#else
    pcPic->create( sps.getChromaFormatIdc(), Size( sps.getPicWidthInLumaSamples(), sps.getPicHeightInLumaSamples() ), sps.getMaxCUWidth(), sps.getMaxCUWidth() + 16, true );
#endif
  }
  else
  {
#if JVET_O1164_PS
    if( !pcPic->Y().Size::operator==( Size( pps.getPicWidthInLumaSamples(), pps.getPicHeightInLumaSamples() ) ) || pcPic->cs->pcv->maxCUWidth != sps.getMaxCUWidth() || pcPic->cs->pcv->maxCUHeight != sps.getMaxCUHeight() )
    {
      pcPic->destroy();
      pcPic->create( sps.getChromaFormatIdc(), Size( pps.getPicWidthInLumaSamples(), pps.getPicHeightInLumaSamples() ), sps.getMaxCUWidth(), sps.getMaxCUWidth() + 16, true );
    }
#else
    if( !pcPic->Y().Size::operator==( Size( sps.getPicWidthInLumaSamples(), sps.getPicHeightInLumaSamples() ) ) || pcPic->cs->pcv->maxCUWidth != sps.getMaxCUWidth() || pcPic->cs->pcv->maxCUHeight != sps.getMaxCUHeight() )
    {
      pcPic->destroy();
      pcPic->create( sps.getChromaFormatIdc(), Size( sps.getPicWidthInLumaSamples(), sps.getPicHeightInLumaSamples() ), sps.getMaxCUWidth(), sps.getMaxCUWidth() + 16, true );
    }
#endif
  }

  pcPic->setBorderExtension( false );
  pcPic->neededForOutput = false;
  pcPic->reconstructed = false;

  return pcPic;
}


void DecLib::executeLoopFilters()
{
  if( !m_pcPic )
  {
    return; // nothing to deblock
  }

  m_pcPic->cs->slice->startProcessingTimer();

  CodingStructure& cs = *m_pcPic->cs;

  if (cs.sps->getUseReshaper() && m_cReshaper.getSliceReshaperInfo().getUseSliceReshaper())
  {
      CHECK((m_cReshaper.getRecReshaped() == false), "Rec picture is not reshaped!");
      m_pcPic->getRecoBuf(COMPONENT_Y).rspSignal(m_cReshaper.getInvLUT());
      m_cReshaper.setRecReshaped(false);
      m_cSAO.setReshaper(&m_cReshaper);
  }
  // deblocking filter
  m_cLoopFilter.loopFilterPic( cs );
  CS::setRefinedMotionField(cs);
  if( cs.sps->getSAOEnabledFlag() )
  {
    m_cSAO.SAOProcess( cs, cs.picture->getSAO() );
  }

  if( cs.sps->getALFEnabledFlag() )
  {
    if (cs.slice->getTileGroupAlfEnabledFlag(COMPONENT_Y))
    {
      // ALF decodes the differentially coded coefficients and stores them in the parameters structure.
      // Code could be restructured to do directly after parsing. So far we just pass a fresh non-const
      // copy in case the APS gets used more than once.
      m_cALF.ALFProcess(cs);
    }

  }

  m_pcPic->cs->slice->stopProcessingTimer();
}

void DecLib::finishPictureLight(int& poc, PicList*& rpcListPic )
{
  Slice*  pcSlice = m_pcPic->cs->slice;

  m_pcPic->neededForOutput = (pcSlice->getPicOutputFlag() ? true : false);
  m_pcPic->reconstructed = true;

  Slice::sortPicList( m_cListPic ); // sorting for application output
  poc                 = pcSlice->getPOC();
  rpcListPic          = &m_cListPic;
}

void DecLib::finishPicture(int& poc, PicList*& rpcListPic, MsgLevel msgl )
{
#if RExt__DECODER_DEBUG_TOOL_STATISTICS
  CodingStatistics::StatTool& s = CodingStatistics::GetStatisticTool( STATS__TOOL_TOTAL_FRAME );
  s.count++;
  s.pixels = s.count * m_pcPic->Y().width * m_pcPic->Y().height;
#endif

  Slice*  pcSlice = m_pcPic->cs->slice;

  char c = (pcSlice->isIntra() ? 'I' : pcSlice->isInterP() ? 'P' : 'B');
  if (!m_pcPic->referenced)
  {
    c += 32;  // tolower
  }

  //-- For time output for each slice
  msg( msgl, "POC %4d TId: %1d ( %c-SLICE, QP%3d ) ", pcSlice->getPOC(),
         pcSlice->getTLayer(),
         c,
         pcSlice->getSliceQp() );
  msg( msgl, "[DT %6.3f] ", pcSlice->getProcessingTime() );

  for (int iRefList = 0; iRefList < 2; iRefList++)
  {
    msg( msgl, "[L%d ", iRefList);
    for (int iRefIndex = 0; iRefIndex < pcSlice->getNumRefIdx(RefPicList(iRefList)); iRefIndex++)
    {
#if RPR_CTC_PRINT
      const std::pair<int, int>& scaleRatio = pcSlice->getScalingRatio( RefPicList( iRefList ), iRefIndex );

      if( pcSlice->getEnableTMVPFlag() && pcSlice->getColFromL0Flag() == bool(1 - iRefList) && pcSlice->getColRefIdx() == iRefIndex )
      {
        msg( msgl, "%dc(%1.2lfx, %1.2lfx) ", pcSlice->getRefPOC( RefPicList( iRefList ), iRefIndex ), double( scaleRatio.first ) / ( 1 << SCALE_RATIO_BITS ), double( scaleRatio.second ) / ( 1 << SCALE_RATIO_BITS ) );
      }
      else
      {
        msg( msgl, "%d(%1.2lfx, %1.2lfx) ", pcSlice->getRefPOC( RefPicList( iRefList ), iRefIndex ), double( scaleRatio.first ) / ( 1 << SCALE_RATIO_BITS ), double( scaleRatio.second ) / ( 1 << SCALE_RATIO_BITS ) );
      }
#else
      msg( msgl, "%d ", pcSlice->getRefPOC(RefPicList(iRefList), iRefIndex));
#endif
    }
    msg( msgl, "] ");
  }
  if (m_decodedPictureHashSEIEnabled)
  {
    SEIMessages pictureHashes = getSeisByType(m_pcPic->SEIs, SEI::DECODED_PICTURE_HASH );
    const SEIDecodedPictureHash *hash = ( pictureHashes.size() > 0 ) ? (SEIDecodedPictureHash*) *(pictureHashes.begin()) : NULL;
    if (pictureHashes.size() > 1)
    {
      msg( WARNING, "Warning: Got multiple decoded picture hash SEI messages. Using first.");
    }
    m_numberOfChecksumErrorsDetected += calcAndPrintHashStatus(((const Picture*) m_pcPic)->getRecoBuf(), hash, pcSlice->getSPS()->getBitDepths(), msgl);
  }

  msg( msgl, "\n");

  m_pcPic->neededForOutput = (pcSlice->getPicOutputFlag() ? true : false);
  m_pcPic->reconstructed = true;


  Slice::sortPicList( m_cListPic ); // sorting for application output
  poc                 = pcSlice->getPOC();
  rpcListPic          = &m_cListPic;
  m_bFirstSliceInPicture  = true; // TODO: immer true? hier ist irgendwas faul

  m_pcPic->destroyTempBuffers();
  m_pcPic->cs->destroyCoeffs();
  m_pcPic->cs->releaseIntermediateData();
}

void DecLib::checkNoOutputPriorPics (PicList* pcListPic)
{
  if (!pcListPic || !m_isNoOutputPriorPics)
  {
    return;
  }

  PicList::iterator  iterPic   = pcListPic->begin();

  while (iterPic != pcListPic->end())
  {
    Picture* pcPicTmp = *(iterPic++);
    if (m_lastPOCNoOutputPriorPics != pcPicTmp->getPOC())
    {
      pcPicTmp->neededForOutput = false;
    }
  }
}

void DecLib::xUpdateRasInit(Slice* slice)
{
  slice->setPendingRasInit( false );
  if ( slice->getPOC() > m_lastRasPoc )
  {
    m_lastRasPoc = MAX_INT;
    slice->setPendingRasInit( true );
  }
  if ( slice->isIRAP() )
  {
    m_lastRasPoc = slice->getPOC();
  }
}

void DecLib::xCreateLostPicture(int iLostPoc)
{
  msg( INFO, "\ninserting lost poc : %d\n",iLostPoc);
  Picture *cFillPic = xGetNewPicBuffer(*(m_parameterSetManager.getFirstSPS()), *(m_parameterSetManager.getFirstPPS()), 0);

  CHECK( !cFillPic->slices.size(), "No slices in picture" );

  cFillPic->slices[0]->initSlice();

  PicList::iterator iterPic = m_cListPic.begin();
  int closestPoc = 1000000;
  while ( iterPic != m_cListPic.end())
  {
    Picture * rpcPic = *(iterPic++);
    if(abs(rpcPic->getPOC() -iLostPoc)<closestPoc&&abs(rpcPic->getPOC() -iLostPoc)!=0&&rpcPic->getPOC()!=m_apcSlicePilot->getPOC())
    {
      closestPoc=abs(rpcPic->getPOC() -iLostPoc);
    }
  }
  iterPic = m_cListPic.begin();
  while ( iterPic != m_cListPic.end())
  {
    Picture *rpcPic = *(iterPic++);
    if(abs(rpcPic->getPOC() -iLostPoc)==closestPoc&&rpcPic->getPOC()!=m_apcSlicePilot->getPOC())
    {
      msg( INFO, "copying picture %d to %d (%d)\n",rpcPic->getPOC() ,iLostPoc,m_apcSlicePilot->getPOC());
      cFillPic->getRecoBuf().copyFrom( rpcPic->getRecoBuf() );
      break;
    }
  }

//  for(int ctuRsAddr=0; ctuRsAddr<cFillPic->getNumberOfCtusInFrame(); ctuRsAddr++)  { cFillPic->getCtu(ctuRsAddr)->initCtu(cFillPic, ctuRsAddr); }
  cFillPic->referenced = true;
  cFillPic->slices[0]->setPOC(iLostPoc);
  xUpdatePreviousTid0POC(cFillPic->slices[0]);
  cFillPic->reconstructed = true;
  cFillPic->neededForOutput = true;
  if(m_pocRandomAccess == MAX_INT)
  {
    m_pocRandomAccess = iLostPoc;
  }

}


void DecLib::xActivateParameterSets()
{
  if (m_bFirstSliceInPicture)
  {
    APS** apss = m_parameterSetManager.getAPSs();
#if JVET_O_MAX_NUM_ALF_APS_8
    memset(apss, 0, sizeof(*apss) * ALF_CTB_MAX_NUM_APS);
#else
    memset(apss, 0, sizeof(*apss) * MAX_NUM_APS);
#endif
    const PPS *pps = m_parameterSetManager.getPPS(m_apcSlicePilot->getPPSId()); // this is a temporary PPS object. Do not store this value
    CHECK(pps == 0, "No PPS present");

    const SPS *sps = m_parameterSetManager.getSPS(pps->getSPSId());             // this is a temporary SPS object. Do not store this value
    CHECK(sps == 0, "No SPS present");

    if (NULL == pps->pcv)
    {
      m_parameterSetManager.getPPS( m_apcSlicePilot->getPPSId() )->pcv = new PreCalcValues( *sps, *pps, false );
    }
    m_parameterSetManager.clearSPSChangedFlag(sps->getSPSId());
    m_parameterSetManager.clearPPSChangedFlag(pps->getPPSId());

    if (false == m_parameterSetManager.activatePPS(m_apcSlicePilot->getPPSId(),m_apcSlicePilot->isIRAP()))
    {
      THROW("Parameter set activation failed!");
    }
    m_parameterSetManager.getApsMap()->clear();
    //luma APSs
    for (int i = 0; i < m_apcSlicePilot->getTileGroupApsIdLuma().size(); i++)
    {
      int apsId = m_apcSlicePilot->getTileGroupApsIdLuma()[i];
      APS* aps = m_parameterSetManager.getAPS(apsId, ALF_APS);

      if (aps)
      {
        m_parameterSetManager.clearAPSChangedFlag(apsId, ALF_APS);
        apss[apsId] = aps;
        if (false == m_parameterSetManager.activateAPS(apsId, ALF_APS))
        {
          THROW("APS activation failed!");
        }
      }
    }

    //chroma APS
    int apsId = m_apcSlicePilot->getTileGroupApsIdChroma();
    APS* aps = m_parameterSetManager.getAPS(apsId, ALF_APS);
    if (aps)
    {
      m_parameterSetManager.clearAPSChangedFlag(apsId, ALF_APS);
      apss[apsId] = aps;
      if (false == m_parameterSetManager.activateAPS(apsId, ALF_APS))
      {
        THROW("APS activation failed!");
      }
    }

    APS* lmcsAPS = NULL;
    if (m_apcSlicePilot->getLmcsAPSId() != -1)
    {
      lmcsAPS = m_parameterSetManager.getAPS(m_apcSlicePilot->getLmcsAPSId(), LMCS_APS);
      CHECK(lmcsAPS == 0, "No LMCS APS present");
    }

    if (lmcsAPS)
    {
      m_parameterSetManager.clearAPSChangedFlag(m_apcSlicePilot->getLmcsAPSId(), LMCS_APS);
      if (false == m_parameterSetManager.activateAPS(m_apcSlicePilot->getLmcsAPSId(), LMCS_APS))
      {
        THROW("LMCS APS activation failed!");
      }
    }

    xParsePrefixSEImessages();

#if RExt__HIGH_BIT_DEPTH_SUPPORT==0
    if (sps->getSpsRangeExtension().getExtendedPrecisionProcessingFlag() || sps->getBitDepth(CHANNEL_TYPE_LUMA)>12 || sps->getBitDepth(CHANNEL_TYPE_CHROMA)>12 )
    {
      THROW("High bit depth support must be enabled at compile-time in order to decode this bitstream\n");
    }
#endif

    //  Get a new picture buffer. This will also set up m_pcPic, and therefore give us a SPS and PPS pointer that we can use.
    m_pcPic = xGetNewPicBuffer (*sps, *pps, m_apcSlicePilot->getTLayer());

    m_apcSlicePilot->applyReferencePictureListBasedMarking(m_cListPic, m_apcSlicePilot->getRPL0(), m_apcSlicePilot->getRPL1());
    m_pcPic->finalInit(*sps, *pps, apss, *lmcsAPS);
    m_parameterSetManager.getPPS(m_apcSlicePilot->getPPSId())->setNumBricksInPic((int)m_pcPic->brickMap->bricks.size());
    m_pcPic->createTempBuffers( m_pcPic->cs->pps->pcv->maxCUWidth );
    m_pcPic->cs->createCoeffs();

    m_pcPic->allocateNewSlice();
    // make the slice-pilot a real slice, and set up the slice-pilot for the next slice
    CHECK(m_pcPic->slices.size() != (m_uiSliceSegmentIdx + 1), "Invalid number of slices");
    m_apcSlicePilot = m_pcPic->swapSliceObject(m_apcSlicePilot, m_uiSliceSegmentIdx);

    // we now have a real slice:
    Slice *pSlice = m_pcPic->slices[m_uiSliceSegmentIdx];

    // Update the PPS and SPS pointers with the ones of the picture.
    pps=pSlice->getPPS();
    sps=pSlice->getSPS();

    // fix Parameter Sets, now that we have the real slice
    m_pcPic->cs->slice = pSlice;
    m_pcPic->cs->sps   = sps;
    m_pcPic->cs->pps   = pps;
    memcpy(m_pcPic->cs->alfApss, apss, sizeof(m_pcPic->cs->alfApss));
    m_pcPic->cs->lmcsAps = lmcsAPS;

    m_pcPic->cs->pcv   = pps->pcv;

    // Initialise the various objects for the new set of settings
#if JVET_O1164_PS
    m_cSAO.create( pps->getPicWidthInLumaSamples(), pps->getPicHeightInLumaSamples(), sps->getChromaFormatIdc(), sps->getMaxCUWidth(), sps->getMaxCUHeight(), sps->getMaxCodingDepth(), pps->getPpsRangeExtension().getLog2SaoOffsetScale( CHANNEL_TYPE_LUMA ), pps->getPpsRangeExtension().getLog2SaoOffsetScale( CHANNEL_TYPE_CHROMA ) );
#else
    m_cSAO.create( sps->getPicWidthInLumaSamples(), sps->getPicHeightInLumaSamples(), sps->getChromaFormatIdc(), sps->getMaxCUWidth(), sps->getMaxCUHeight(), sps->getMaxCodingDepth(), pps->getPpsRangeExtension().getLog2SaoOffsetScale(CHANNEL_TYPE_LUMA), pps->getPpsRangeExtension().getLog2SaoOffsetScale(CHANNEL_TYPE_CHROMA) );
#endif
    m_cLoopFilter.create( sps->getMaxCodingDepth() );
    m_cIntraPred.init( sps->getChromaFormatIdc(), sps->getBitDepth( CHANNEL_TYPE_LUMA ) );
#if JVET_O1170_IBC_VIRTUAL_BUFFER
    m_cInterPred.init( &m_cRdCost, sps->getChromaFormatIdc(), sps->getMaxCUHeight() );
#else
    m_cInterPred.init( &m_cRdCost, sps->getChromaFormatIdc() );
#endif
    if (sps->getUseReshaper())
    {
      m_cReshaper.createDec(sps->getBitDepth(CHANNEL_TYPE_LUMA));
    }

    bool isField = false;
    bool isTopField = false;

    if(!m_SEIs.empty())
    {
      // Check if any new Picture Timing SEI has arrived
      SEIMessages pictureTimingSEIs = getSeisByType(m_SEIs, SEI::PICTURE_TIMING);
      if (pictureTimingSEIs.size()>0)
      {
        SEIPictureTiming* pictureTiming = (SEIPictureTiming*) *(pictureTimingSEIs.begin());
        isField    = (pictureTiming->m_picStruct == 1) || (pictureTiming->m_picStruct == 2) || (pictureTiming->m_picStruct == 9) || (pictureTiming->m_picStruct == 10) || (pictureTiming->m_picStruct == 11) || (pictureTiming->m_picStruct == 12);
        isTopField = (pictureTiming->m_picStruct == 1) || (pictureTiming->m_picStruct == 9) || (pictureTiming->m_picStruct == 11);
      }
    }

    //Set Field/Frame coding mode
    m_pcPic->fieldPic = isField;
    m_pcPic->topField = isTopField;

    // transfer any SEI messages that have been received to the picture
    m_pcPic->SEIs = m_SEIs;
    m_SEIs.clear();

    // Recursive structure
    m_cCuDecoder.init( &m_cTrQuant, &m_cIntraPred, &m_cInterPred );
    if (sps->getUseReshaper())
    {
      m_cCuDecoder.initDecCuReshaper(&m_cReshaper, sps->getChromaFormatIdc());
    }
#if MAX_TB_SIZE_SIGNALLING
    m_cTrQuant.init( nullptr, sps->getMaxTbSize(), false, false, false, false, false );
#else
    m_cTrQuant.init( nullptr, MAX_TB_SIZEY, false, false, false, false, false );
#endif

    // RdCost
    m_cRdCost.setCostMode ( COST_STANDARD_LOSSY ); // not used in decoder side RdCost stuff -> set to default

    m_cSliceDecoder.create();

    if( sps->getALFEnabledFlag() )
    {
#if JVET_O1164_PS
      m_cALF.create( pps->getPicWidthInLumaSamples(), pps->getPicHeightInLumaSamples(), sps->getChromaFormatIdc(), sps->getMaxCUWidth(), sps->getMaxCUHeight(), sps->getMaxCodingDepth(), sps->getBitDepths().recon );
#else
      m_cALF.create( sps->getPicWidthInLumaSamples(), sps->getPicHeightInLumaSamples(), sps->getChromaFormatIdc(), sps->getMaxCUWidth(), sps->getMaxCUHeight(), sps->getMaxCodingDepth(), sps->getBitDepths().recon );
#endif
    }
  }
  else
  {
    // make the slice-pilot a real slice, and set up the slice-pilot for the next slice
    m_pcPic->allocateNewSlice();
    CHECK(m_pcPic->slices.size() != (size_t)(m_uiSliceSegmentIdx + 1), "Invalid number of slices");
    m_apcSlicePilot = m_pcPic->swapSliceObject(m_apcSlicePilot, m_uiSliceSegmentIdx);

    Slice *pSlice = m_pcPic->slices[m_uiSliceSegmentIdx]; // we now have a real slice.

    const SPS *sps = pSlice->getSPS();
    const PPS *pps = pSlice->getPPS();
    APS** apss = pSlice->getAlfAPSs();
    APS *lmcsAPS = pSlice->getLmcsAPS();

    // fix Parameter Sets, now that we have the real slice
    m_pcPic->cs->slice = pSlice;
    m_pcPic->cs->sps   = sps;
    m_pcPic->cs->pps   = pps;
    memcpy(m_pcPic->cs->alfApss, apss, sizeof(m_pcPic->cs->alfApss));
    m_pcPic->cs->lmcsAps = lmcsAPS;

    m_pcPic->cs->pcv   = pps->pcv;

    // check that the current active PPS has not changed...
    if (m_parameterSetManager.getSPSChangedFlag(sps->getSPSId()) )
    {
      EXIT("Error - a new SPS has been decoded while processing a picture");
    }
    if (m_parameterSetManager.getPPSChangedFlag(pps->getPPSId()) )
    {
      EXIT("Error - a new PPS has been decoded while processing a picture");
    }
#if JVET_O_MAX_NUM_ALF_APS_8
    for (int i = 0; i < ALF_CTB_MAX_NUM_APS; i++)
#else
    for (int i = 0; i < MAX_NUM_APS; i++)
#endif
    {
      APS* aps = m_parameterSetManager.getAPS(i, ALF_APS);
      if (aps && m_parameterSetManager.getAPSChangedFlag(i, ALF_APS))
      {
        EXIT("Error - a new APS has been decoded while processing a picture");
      }
    }

    if (lmcsAPS && m_parameterSetManager.getAPSChangedFlag(lmcsAPS->getAPSId(), LMCS_APS) )
    {
      EXIT("Error - a new LMCS APS has been decoded while processing a picture");
    }

    xParsePrefixSEImessages();

    // Check if any new SEI has arrived
     if(!m_SEIs.empty())