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/** \file     Picture.cpp

 *  \brief    Description of a coded picture

 */

#include "Picture.h"

#include "ChromaFormat.h"

// ---------------------------------------------------------------------------

// picture methods

// ---------------------------------------------------------------------------

namespace vvdec

{

static void paddPicBorderTopCore(Pel *pi, ptrdiff_t stride,int width,int xmargin,int ymargin)

{

  for( int x = 0; x < xmargin; x++ )

  {

    pi[-xmargin + x] = pi[0];

    pi[width + x] = pi[width - 1];

  }

  pi -= xmargin;

  // pi is now (-marginX, 0)

  for( int y = 0; y < ymargin; y++ )

  {

    ::memcpy( pi - ( y + 1 )*stride, pi, sizeof( Pel )*( width + ( xmargin << 1 ) ) );

  }

}

static void paddPicBorderBotCore(Pel *pi, ptrdiff_t stride,int width,int xmargin,int ymargin)

{

  for( int x = 0; x < xmargin; x++ )

  {

    pi[-xmargin + x] = pi[0];

    pi[width  + x] = pi[width - 1];

  }

  pi -= xmargin;

  // pi is now the (-marginX, height-1)

  for( int y = 0; y < ymargin; y++ )

  {

    ::memcpy( pi + ( y + 1 )*stride, pi, sizeof( Pel )*( width + ( xmargin << 1 ) ) );

  }

}

static void paddPicBorderLeftRightCore(Pel *pi, ptrdiff_t stride,int width,int xmargin,int height)

{

  for( int y = 1; y < ( height - 1 ); y++ )

   {

     for( int x = 0; x < xmargin; x++ )

     {

       pi[-xmargin + x] = pi[0];

       pi[width + x] = pi[width - 1];

     }

     pi += stride;

   }

}

void Picture::create(const ChromaFormat &_chromaFormat, const Size &size, const unsigned _maxCUSize, const unsigned _margin, const int _layerId, UserAllocator* _userAllocator )

{

  layerId = _layerId;

  UnitArea::operator=( UnitArea( _chromaFormat, Area( Position{ 0, 0 }, size ) ) );

  margin            = _margin;

  m_bufs[PIC_RECONSTRUCTION].create( _chromaFormat, size, _maxCUSize, _margin, MEMORY_ALIGN_DEF_SIZE, true, _userAllocator );

}

void Picture::createWrapAroundBuf( const bool isWrapAround, const unsigned _maxCUSize )

{

  if( isWrapAround && m_bufs[PIC_RECON_WRAP].bufs.empty() )

    m_bufs[PIC_RECON_WRAP].create( chromaFormat, Y().size(), _maxCUSize, margin, MEMORY_ALIGN_DEF_SIZE );

}

void Picture::resetForUse( int _layerId )

{

  CHECK( lockedByApplication == LOCKED, "the picture can not be re-used, because it has not been unlocked by the application." );

  if( cs )

  {

    cs->resetForUse();

  }

  m_subPicRefBufs.clear();

  m_subPicExtTasks.clear();

  m_dProcessingTime       = 0;

  subPicExtStarted        = false;

  borderExtStarted        = false;

  dpbReferenceMark        = unreferenced;

  stillReferenced         = false;

  isReferencePic          = false;

  progress                = Picture::init;

  neededForOutput         = false;

  wasLost                 = false;

  error                   = false;

  exceptionThrownOut      = false;

  topField                = false;

  fieldPic                = false;

  nonReferencePictureFlag = false;

  skippedDecCount         = 0;

  picCheckedDPH = false;

  subpicsCheckedDPH.clear();

  dphMismatch   = false;

  lockedByApplication = UNLOCKED;

  poc                 = 0;

  cts                 = 0;

  dts                 = 0;

  tempLayer           = std::numeric_limits<uint32_t>::max();

  depth               = 0;

  layerId             = _layerId;

  eNalUnitType        = NAL_UNIT_INVALID;

  bits                = 0;

  rap                 = 0;

  userData            = nullptr;

  decodingOrderNumber = 0;

  sliceSubpicIdx.clear();

  subPictures.clear();

  subLayerNonReferencePictureDueToSTSA = 0;

  m_divTasksCounter     .clearException();

  m_ctuTaskCounter      .clearException();

  m_borderExtTaskCounter.clearException();

  m_copyWrapBufDone     .clearException();

  reconDone             .clearException();

  parseDone             .clearException();

#if RECO_WHILE_PARSE

  std::for_each( ctuParsedBarrier.begin(), ctuParsedBarrier.end(), []( auto& b ) { b.clearException(); } );

#endif

  clearSliceBuffer();

  SEI_internal::deleteSEIs( seiMessageList );

  reconDone.lock();

}

void Picture::destroy()

{

  CHECK_WARN( lockedByApplication == LOCKED, "the picture can not be destroyed, because it has not been unlocked by the application." );

  for (uint32_t t = 0; t < NUM_PIC_TYPES; t++)

  {

    m_bufs[t].destroy();

  }

  if( cs )

  {

    cs->destroy();

    cs.reset();

  }

#if  RECO_WHILE_PARSE

  ctuParsedBarrier.clear();

#endif

  clearSliceBuffer();

  SEI_internal::deleteSEIs( seiMessageList );

  subpicsCheckedDPH.clear();

  m_divTasksCounter     .clearException();

  m_ctuTaskCounter      .clearException();

  m_borderExtTaskCounter.clearException();

  m_copyWrapBufDone     .clearException();

  reconDone             .clearException();

  parseDone             .clearException();

#if RECO_WHILE_PARSE

  std::for_each( ctuParsedBarrier.begin(), ctuParsedBarrier.end(), []( auto& b ) { b.clearException(); } );

#endif

}

       PelBuf     Picture::getRecoBuf(const ComponentID compID, bool wrap)       { return getBuf(compID, wrap ? PIC_RECON_WRAP : PIC_RECONSTRUCTION); }

const CPelBuf     Picture::getRecoBuf(const ComponentID compID, bool wrap) const { return getBuf(compID, wrap ? PIC_RECON_WRAP : PIC_RECONSTRUCTION); }

       PelBuf     Picture::getRecoBuf(const CompArea &blk, bool wrap)            { return getBuf(blk,    wrap ? PIC_RECON_WRAP : PIC_RECONSTRUCTION); }

const CPelBuf     Picture::getRecoBuf(const CompArea &blk, bool wrap)      const { return getBuf(blk,    wrap ? PIC_RECON_WRAP : PIC_RECONSTRUCTION); }

       PelUnitBuf Picture::getRecoBuf(const UnitArea &unit, bool wrap)           { return getBuf(unit,   wrap ? PIC_RECON_WRAP : PIC_RECONSTRUCTION); }

const CPelUnitBuf Picture::getRecoBuf(const UnitArea &unit, bool wrap)     const { return getBuf(unit,   wrap ? PIC_RECON_WRAP : PIC_RECONSTRUCTION); }

       PelUnitBuf Picture::getRecoBuf( bool wrap )                               { return wrap ? m_bufs[PIC_RECON_WRAP] : m_bufs[PIC_RECONSTRUCTION]; }

const CPelUnitBuf Picture::getRecoBuf( bool wrap )                         const { return wrap ? m_bufs[PIC_RECON_WRAP] : m_bufs[PIC_RECONSTRUCTION]; }

Picture::Picture( bool enableOpt )

{

  paddPicBorderBot = paddPicBorderBotCore;

  paddPicBorderTop = paddPicBorderTopCore;

  paddPicBorderLeftRight = paddPicBorderLeftRightCore;

  if( enableOpt )

  {

#if ENABLE_SIMD_OPT_PICTURE && defined( TARGET_SIMD_X86 )

    initPictureX86();

#endif

#if ENABLE_SIMD_OPT_PICTURE && defined( TARGET_SIMD_ARM )

    initPictureARM();

#endif

  }

}

void Picture::finalInit( CUChunkCache* cuChunkCache, TUChunkCache* tuChunkCache, CUMapCache* cuMapCache, CUMapCache* chromaCuMapCache, const SPS *sps, const PPS *pps, const std::shared_ptr<PicHeader>& ph, const APS* const alfApss[ALF_CTB_MAX_NUM_APS], const APS* lmcsAps, const APS* scalingListAps, bool phPSupdate )

{

  SEI_internal::deleteSEIs( seiMessageList );

  clearSliceBuffer();

  const ChromaFormat chromaFormatIDC = sps->getChromaFormatIdc();

  const int          iWidth          = pps->getPicWidthInLumaSamples();

  const int          iHeight         = pps->getPicHeightInLumaSamples();

  if( !cs )

  {

    cs = std::make_unique<CodingStructure>( cuChunkCache, tuChunkCache, cuMapCache, chromaCuMapCache );

    cs->create( chromaFormatIDC, Area( 0, 0, iWidth, iHeight ) );

  }

#if RECO_WHILE_PARSE

  if( ctuParsedBarrier.size() != pps->pcv->sizeInCtus )

  {

    ctuParsedBarrier = std::vector<Barrier>( pps->pcv->sizeInCtus );

  }

#endif

  parseDone   . lock();

  cs->picture   = this;

  cs->picHeader = ph;

  cs->pps       = pps->getSharedPtr();

  cs->sps       = sps->getSharedPtr();

  cs->pcv       = pps->pcv.get();

  if( phPSupdate )

  {

    ph->setSPSId         ( sps->getSPSId() );

    ph->setPPSId         ( pps->getPPSId() );

    ph->setLmcsAPS       ( lmcsAps        ? lmcsAps       ->getSharedPtr() : nullptr );

    ph->setScalingListAPS( scalingListAps ? scalingListAps->getSharedPtr() : nullptr );

  }

  nonReferencePictureFlag = ph->getNonReferencePictureFlag();

  for( int i = 0; i < ALF_CTB_MAX_NUM_APS; ++i )

  {

    cs->alfApss[i] = alfApss[i] ? alfApss[i]->getSharedPtr() : nullptr;

  }

  if( lmcsAps )

  {

    cs->lmcsAps = lmcsAps ? lmcsAps->getSharedPtr() : nullptr;

  }

  cs->allocTempInternals();

  cs->rebindPicBufs();

  cs->initStructData();

  if( sps->getIBCFlag() )

  {

    cs->initVIbcBuf( cs->pcv->heightInCtus, sps->getChromaFormatIdc(), sps->getMaxCUHeight() );

  }

  resetProcessingTime();

}

Slice* Picture::allocateNewSlice( Slice** pilot )

{

  if( pilot )

  {

    slices.push_back( *pilot );

    *pilot = new Slice;

    if( slices.size() >= 2 )

    {

      ( *pilot )->copySliceInfo( slices[slices.size() - 2] );

      ( *pilot )->initSlice();

    }

    ( *pilot )->clearSPS();

    ( *pilot )->clearPPS();

    ( *pilot )->clearVPS();

    ( *pilot )->clearAlfAPSs();

  }

  else

  {

    slices.push_back( new Slice );

    if( slices.size() >= 2 )

    {

      slices.back()->copySliceInfo( slices[slices.size() - 2] );

      slices.back()->initSlice();

    }

  }

  Slice* slice = slices.back();

  slice->setPPS( cs->pps );

  slice->setSPS( cs->sps );

  slice->setVPS( cs->vps );

  slice->setAlfApss( cs->alfApss );

  slice->setPic( this );

  return slice;

}

void Picture::clearSliceBuffer()

{

  for( auto &s: slices )

  {

    delete s;

  }

  slices.clear();

}

bool Picture::lastSliceOfPicPresent() const

{

  if( slices.empty() )

  {

    return false;

  }

  const Slice*   lastSlice      = slices.back();

  const unsigned lastCtuInSlice = lastSlice->getCtuAddrInSlice( lastSlice->getNumCtuInSlice() - 1 );

  return lastCtuInSlice == lastSlice->getPPS()->pcv->sizeInCtus - 1;

}

void Picture::setParseError( std::exception_ptr e )

{

  error = true;

  parseDone.setException( e );

#if RECO_WHILE_PARSE

  // reconstruction can already be waiting for CTUs, that will never be parsed

  for( auto& b: ctuParsedBarrier )

  {

    b.setException( e );

  }

#endif

}

void Picture::waitForAllTasks()

{

  m_ctuTaskCounter.wait_nothrow();

  m_borderExtTaskCounter.wait_nothrow();

  m_divTasksCounter.wait_nothrow();   // this waits for the slice parsing and the finishPic Task

}

void Picture::ensureUsableAsRef()

{

#if RECO_WHILE_PARSE

  ctuParsedBarrier.clear();

#endif

  neededForOutput = false;

  // set referenced to true, because we don't know if it has been set correctly, but that way it will be available as a reference pic

  dpbReferenceMark = ShortTerm;

  stillReferenced  = true;

  isReferencePic   = true;

  // ensure cs->m_colMiMap is set to zero

  cs->initStructData();

  CHECK_FATAL( reconDone.hasException(), "to be usable as reference the picture should not have an Exception reconDone barrier" );

}

void Picture::fillGrey( const SPS* fallbackSPS )

{

  CHECK( ( !cs || !cs->sps ) && !fallbackSPS, "No SPS accessible" );

  const int bitDepth = cs && cs->sps ? cs->sps->getBitDepth() : fallbackSPS->getBitDepth();

  // fill in grey buffer for missing reference pictures (GDR or broken bitstream)

  const uint32_t yFill = 1 << ( bitDepth - 1 );

  const uint32_t cFill = 1 << ( bitDepth - 1 );

  getRecoBuf().Y().fill( yFill );

  getRecoBuf().Cb().fill( cFill );

  getRecoBuf().Cr().fill( cFill );

  progress = Picture::reconstructed;

  reconDone.unlock();

}

void Picture::extendPicBorder( bool top, bool bottom, bool leftrightT, bool leftrightB, ChannelType chType )

{

  if( cs->pps->getUseWrapAround() )

  {

    extendPicBorderWrap( top, bottom, leftrightT, leftrightB, chType );

  }

  extendPicBorderBuf( m_bufs[PIC_RECONSTRUCTION], top, bottom, leftrightT, leftrightB, chType );

}

void Picture::extendPicBorderWrap( bool top, bool bottom, bool leftrightT, bool leftrightB, ChannelType chType )

{

  for( int comp = 0; comp < getNumberValidComponents( cs->area.chromaFormat ); comp++ )

  {

    ComponentID compID = ComponentID( comp );

    if( chType != MAX_NUM_CHANNEL_TYPE && toChannelType( compID ) != chType )

      continue;

    PelBuf prw = m_bufs[PIC_RECON_WRAP].get( compID );

    const int xmargin = margin >> getComponentScaleX( compID, cs->area.chromaFormat );

    const int ymargin = margin >> getComponentScaleY( compID, cs->area.chromaFormat );

    int xoffset = cs->pps->getWrapAroundOffset() >> getComponentScaleX( compID, cs->area.chromaFormat );

    if( leftrightT )

    {

      Pel* piprw = prw.bufAt( 0, 1 );

      for( int y = 1; y < prw.height / 2; y++ )

      {

        for( int x = 0; x < xmargin; x++ )

        {

          if( x < xoffset )

          {

            piprw[-x - 1]        = piprw[-x - 1 + xoffset];

            piprw[prw.width + x] = piprw[prw.width + x - xoffset];

          }

          else

          {

            piprw[-x - 1]        = piprw[0];

            piprw[prw.width + x] = piprw[prw.width - 1];

          }

        }

        piprw += prw.stride;

      }

    }

    if( leftrightB )

    {

      Pel* piprw = prw.bufAt( 0, prw.height / 2 );

      for( int y = 1; y < prw.height / 2; y++ )

      {

        for( int x = 0; x < xmargin; x++ )

        {

          if( x < xoffset )

          {

            piprw[-x - 1]        = piprw[-x - 1 + xoffset];

            piprw[prw.width + x] = piprw[prw.width + x - xoffset];

          }

          else

          {

            piprw[-x - 1]        = piprw[0];

            piprw[prw.width + x] = piprw[prw.width - 1];

          }

        }

        piprw += prw.stride;

      }

    }

    if( bottom )

    {

      Pel* piprw = prw.bufAt( 0, prw.height - 1 );

      for( int x = 0; x < xmargin; x++ )

      {

        if( x < xoffset )

        {

          piprw[-x - 1]        = piprw[-x - 1 + xoffset];

          piprw[prw.width + x] = piprw[prw.width + x - xoffset];

        }

        else

        {

          piprw[-x - 1]        = piprw[0];

          piprw[prw.width + x] = piprw[prw.width - 1];

        }

      }

      piprw -= xmargin;

      // pi is now the (-marginX, height-1)

      for( int y = 0; y < ymargin; y++ )

      {

        ::memcpy( piprw + ( y + 1 ) * prw.stride, piprw, sizeof( Pel ) * ( prw.width + ( xmargin << 1 ) ) );

      }

    }

    if( top )

    {

      Pel* piprw = prw.bufAt( 0, 0 );

      for( int x = 0; x < xmargin; x++ )

      {

        if( x < xoffset )

        {

          piprw[-x - 1]        = piprw[-x - 1 + xoffset];

          piprw[prw.width + x] = piprw[prw.width + x - xoffset];

        }

        else

        {

          piprw[-x - 1]        = piprw[0];

          piprw[prw.width + x] = piprw[prw.width - 1];

        }

      }

      piprw -= xmargin;

      // pi is now (-marginX, 0)

      for( int y = 0; y < ymargin; y++ )

      {

        ::memcpy( piprw - ( y + 1 ) * prw.stride, piprw, sizeof( Pel ) * ( prw.width + ( xmargin << 1 ) ) );

      }

    }

  }

}

void Picture::extendPicBorderBuf( PelStorage& storage, bool top, bool bottom, bool leftrightT, bool leftrightB, ChannelType chType )

{

  for( int comp = 0; comp < getNumberValidComponents( cs->area.chromaFormat ); comp++ )

  {

    ComponentID compID = ComponentID( comp );

    if( chType != MAX_NUM_CHANNEL_TYPE && toChannelType( compID ) != chType )

      continue;

    PelBuf p = storage.bufs[compID];

    const int xmargin = margin >> getComponentScaleX( compID, cs->area.chromaFormat );

    const int ymargin = margin >> getComponentScaleY( compID, cs->area.chromaFormat );

    if( leftrightT )

    {

      Pel* pi = p.bufAt( 0, 1 );

      paddPicBorderLeftRight( pi, p.stride, p.width, xmargin, 1 + p.height / 2 );

    }

    if( leftrightB )

    {

      Pel* pi = p.bufAt( 0, p.height / 2 );

      paddPicBorderLeftRight( pi, p.stride, p.width, xmargin, 1 + p.height / 2 );

    }

    if( bottom )

    {

      // pi is now the (0,height) (bottom left of image within bigger picture

      Pel* pi = p.bufAt( 0, p.height - 1 );

      paddPicBorderBot( pi, p.stride, p.width, xmargin, ymargin );

    }

    if( top )

    {

      // pi is now the (0,height) (bottom left of image within bigger picture

      Pel* pi = p.bufAt( 0, 0 );

      paddPicBorderTop( pi, p.stride, p.width, xmargin, ymargin );

    }

  }

}

PelBuf Picture::getBuf( const CompArea &blk, const PictureType &type )

{

  if( !blk.valid() )

  {

    return PelBuf();

  }

  return m_bufs[type].getBuf( blk );

}

const CPelBuf Picture::getBuf( const CompArea &blk, const PictureType &type ) const

{

  if( !blk.valid() )

  {

    return PelBuf();

  }

  return m_bufs[type].getBuf( blk );

}

PelUnitBuf Picture::getBuf( const UnitArea &unit, const PictureType &type )

{

  if( chromaFormat == CHROMA_400 )

  {

    return PelUnitBuf( chromaFormat, getBuf( unit.Y(), type ) );

  }

  else

  {

    return PelUnitBuf( chromaFormat, getBuf( unit.Y(), type ), getBuf( unit.Cb(), type ), getBuf( unit.Cr(), type ) );

  }

}

const CPelUnitBuf Picture::getBuf( const UnitArea &unit, const PictureType &type ) const

{

  if( chromaFormat == CHROMA_400 )

  {

    return CPelUnitBuf( chromaFormat, getBuf( unit.Y(), type ) );

  }

  else

  {

    return CPelUnitBuf( chromaFormat, getBuf( unit.Y(), type ), getBuf( unit.Cb(), type ), getBuf( unit.Cr(), type ) );

  }

}

Pel* Picture::getOrigin( const PictureType &type, const ComponentID compID ) const

{

  return m_bufs[type].getOrigin( compID );

}

PelBuf Picture::getOriginBuf( const PictureType &type, const ComponentID compID )

{

  return m_bufs[type].getOriginBuf( compID );

}

Size Picture::getBufSize( const PictureType &type, const ComponentID compID ) const

{

  return m_bufs[type].getBufSize( compID );

}

void* Picture::getBufAllocator( const ComponentID compID )

{

  return m_bufs[PIC_RECONSTRUCTION].getBufAllocator( compID );

}

bool Picture::isExternAllocator() const

{

  return m_bufs[PIC_RECONSTRUCTION].isExternAllocator();

}

const UserAllocator* Picture::getUserAllocator() const

{

  return m_bufs[PIC_RECONSTRUCTION].getUserAllocator();

}

std::vector<Picture*> Picture::buildAllRefPicsVec()

{

  std::vector<Picture*> refPics;

  for( const Slice* slice : this->slices )

  {

    if( slice->isIntra() )

    {

      continue;

    }

    for( int iDir = REF_PIC_LIST_0; iDir < NUM_REF_PIC_LIST_01; ++iDir )

    {

      for( int iRefIdx = 0; iRefIdx < slice->getNumRefIdx( ( RefPicList ) iDir ); iRefIdx++ )

      {

        Picture* refPic = slice->getNoConstRefPic( ( RefPicList ) iDir, iRefIdx );

        if( std::find( refPics.cbegin(), refPics.cend(), refPic ) == refPics.cend() )

        {

          refPics.push_back( refPic );

        }

      }

    }

  }

  return refPics;

}

void Picture::startProcessingTimer()

{

  std::lock_guard<std::mutex> lock( m_timerMutex );

  m_processingStartTime = std::chrono::steady_clock::now();

}

void Picture::stopProcessingTimer()

{

  std::lock_guard<std::mutex> lock( m_timerMutex );

  auto endTime = std::chrono::steady_clock::now();

  m_dProcessingTime += std::chrono::duration<double>(endTime - m_processingStartTime).count();

}

}   // namespace vvdec