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/** \file     Picture.cpp

 *  \brief    Description of a coded picture

 */

#include "Picture.h"

#include "SEI.h"

#include <algorithm>

#include <math.h>

//! \ingroup CommonLib

//! \{

namespace vvenc {

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

// picture methods

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

// ====================================================================================================================

// AMaxBT block statistics

// ====================================================================================================================

void BlkStat::storeBlkSize( const Picture& pic )

{

  const Slice& slice = *(pic.slices[ 0 ]);

  ::memset( m_uiBlkSize, 0, sizeof( m_uiBlkSize ) );

  ::memset( m_uiNumBlk,  0, sizeof( m_uiNumBlk ) );

  if ( ! slice.isIRAP() )

  {

    const int refLayer = std::min<int>( slice.TLayer, NUM_AMAXBT_LAYER - 1 );

    for ( const CodingUnit *cu : pic.cs->cus )

    {

      m_uiBlkSize[ refLayer ] += cu->Y().area();

      m_uiNumBlk [ refLayer ] += 1;

    }

  }

}

void BlkStat::updateMaxBT( const Slice& slice, const BlkStat& blkStat )

{

  if ( ! slice.isIRAP() )

  {

    const int refLayer = std::min<int>( slice.TLayer, NUM_AMAXBT_LAYER - 1 );

    m_uiBlkSize[ refLayer ] += blkStat.m_uiBlkSize[ refLayer ];

    m_uiNumBlk [ refLayer ] += blkStat.m_uiNumBlk [ refLayer ];

  }

}

void BlkStat::setSliceMaxBT( Slice& slice )

{

  if( ! slice.isIRAP() )

  {

    const int refLayer = std::min<int>( slice.TLayer, NUM_AMAXBT_LAYER - 1 );

    if( m_bResetAMaxBT && slice.poc > m_uiPrevISlicePOC )

    {

      ::memset( m_uiBlkSize, 0, sizeof( m_uiBlkSize ) );

      ::memset( m_uiNumBlk,  0, sizeof( m_uiNumBlk ) );

      m_bResetAMaxBT = false;

    }

    if( refLayer >= 0 && m_uiNumBlk[ refLayer ] != 0 )

    {

      slice.picHeader->splitConsOverride = true;

      double dBlkSize = sqrt( ( double ) m_uiBlkSize[refLayer] / m_uiNumBlk[refLayer] );

      if( dBlkSize < AMAXBT_TH32 || slice.sps->CTUSize == 32 )

      {

        slice.picHeader->maxBTSize[1] = ( 32 > MAX_BT_SIZE_INTER ? MAX_BT_SIZE_INTER : 32 );

      }

      else if( dBlkSize < AMAXBT_TH64 || slice.sps->CTUSize == 64 )

      {

        slice.picHeader->maxBTSize[1] = ( 64 > MAX_BT_SIZE_INTER ? MAX_BT_SIZE_INTER : 64 );

      }

      else

      {

        slice.picHeader->maxBTSize[1] = ( 128 > MAX_BT_SIZE_INTER ? MAX_BT_SIZE_INTER : 128 );

      }

      m_uiBlkSize[ refLayer ] = 0;

      m_uiNumBlk [ refLayer ] = 0;

    }

  }

  else

  {

    if( m_bResetAMaxBT )

    {

      ::memset( m_uiBlkSize, 0, sizeof( m_uiBlkSize ) );

      ::memset( m_uiNumBlk,  0, sizeof( m_uiNumBlk ) );

    }

    m_uiPrevISlicePOC = slice.poc;

    m_bResetAMaxBT    = true;

  }

}

// ====================================================================================================================

// Picture

// ====================================================================================================================

Picture::Picture()

    : cs                  ( nullptr )

    , vps                 ( nullptr )

    , dci                 ( nullptr )

    , picApsMap           ( MAX_NUM_APS * MAX_NUM_APS_TYPE )

    , isInitDone          ( false )

    , isReconstructed     ( false )

    , isBorderExtended    ( false )

    , isReferenced        ( false )

    , isNeededForOutput   ( false )

    , isFinished          ( false )

    , isLongTerm          ( false )

    , isFlush             ( false )

    , isInProcessList     ( false )

    , precedingDRAP       ( false )

    , gopEntry            ( nullptr )

    , refCounter          ( 0 )

    , poc                 ( 0 )

    , TLayer              ( std::numeric_limits<uint32_t>::max() )

    , layerId             ( 0 )

    , isSubPicBorderSaved (false)

    , sliceDataNumBins    ( 0 )

    , cts                 ( 0 )

    , ctsValid            ( false )

    , picsInMissing       ( 0 )

    , picOutOffset        ( 0 )

    , isPreAnalysis       ( false )

    , m_picShared         ( nullptr )

    , gopAdaptedQP        ( 0 )

    , force2ndOrder       ( false )

    , isSceneCutGOP       ( false )

    , isSceneCutCheckAdjQP( false )

    , isMeanQPLimited     ( false )

    , picInitialQP        ( -1 )

    , picInitialLambda    ( -1.0 )

    , picQPFraction       ( 0.0 )

    , picMemorySTA        ( -1 )

    , picVA               ()

    , isSccWeak           ( false )

    , isSccStrong         ( false )

    , useME               ( false )

    , useMCTF             ( false )

    , useTS               ( false )

    , useBDPCM            ( false )

    , useIBC              ( false )

    , useSAO              ( false )

    , useNumRefs          ( false )

    , useFastMrg          ( 0 )

    , useQtbttSpeedUpMode ( 0 )

    , actualHeadBits      ( 0 )

    , actualTotalBits     ( 0 )

    , encRCPic            ( nullptr )

    , picApsGlobal        ( nullptr )

    , refApsGlobal        ( nullptr )

{

  std::fill_n( m_sharedBufs, (int)NUM_PIC_TYPES, nullptr );

  std::fill_n( m_bufsOrigPrev, NUM_QPA_PREV_FRAMES, nullptr );

}

void Picture::create( ChromaFormat _chromaFormat, const Size& size, unsigned _maxCUSize, unsigned _margin, bool _decoder )

{

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

  margin            =  _margin;

  if( _decoder )

  {

    m_picBufs[ PIC_RESIDUAL   ].create( _chromaFormat, Area( 0, 0, _maxCUSize, _maxCUSize ) );

    m_picBufs[ PIC_PREDICTION ].create( _chromaFormat, Area( 0, 0, _maxCUSize, _maxCUSize ) );

  }

}

void Picture::reset()

{

  // reset picture

  isInitDone           = false;

  isReconstructed      = false;

  isBorderExtended     = false;

  isReferenced         = true;

  isNeededForOutput    = true;

  isFinished           = false;

  isLongTerm           = false;

  isFlush              = false;

  isInProcessList      = false;

  isMeanQPLimited      = false;

  precedingDRAP        = false;

  gopEntry             = nullptr;

  refCounter           = 0;

  poc                  = -1;

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

  gopAdaptedQP         = 0;

  force2ndOrder        = false;

  isSceneCutGOP        = false;

  isSceneCutCheckAdjQP = false;

  actualHeadBits       = 0;

  actualTotalBits      = 0;

  encRCPic             = nullptr;

  picApsGlobal         = nullptr;

  refApsGlobal         = nullptr;

  cts                  = 0;

  ctsValid             = false;

  picsInMissing        = 0;

  picOutOffset         = 0;

  picVA.reset();

  std::fill_n( m_sharedBufs, (int)NUM_PIC_TYPES, nullptr );

  std::fill_n( m_bufsOrigPrev, NUM_QPA_PREV_FRAMES, nullptr );

  if( m_tileColsDone )

    std::fill( m_tileColsDone->begin(), m_tileColsDone->end(), 0 );

  encTime.resetTimer();

}

void Picture::destroy( bool bPicHeader )

{

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

  {

    m_picBufs[  t ].destroy();

  }

  if( cs )

  {

    if( bPicHeader && cs->picHeader )

    {

      delete cs->picHeader;

    }

    cs->picHeader = nullptr;

    cs->destroy();

    delete cs;

    cs = nullptr;

  }

  for( auto &ps : slices )

  {

    delete ps;

  }

  slices.clear();

  for( auto &psei : SEIs )

  {

    delete psei;

  }

  delete m_tileColsDone;

  SEIs.clear();

}

void Picture::linkSharedBuffers( PelStorage* origBuf, PelStorage* filteredBuf, PelStorage* prevOrigBufs[ NUM_QPA_PREV_FRAMES ], PicShared* picShared )

{

  m_picShared                      = picShared;

  m_sharedBufs[ PIC_ORIGINAL ]      = origBuf;

  m_sharedBufs[ PIC_FILT_ORIGINAL ] = filteredBuf;

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

    m_bufsOrigPrev[ i ] = prevOrigBufs[ i ];

}

void Picture::releasePrevBuffers()

{

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

    m_bufsOrigPrev[ i ] = nullptr;

}

void Picture::releaseSharedBuffers()

{

  m_picShared                      = nullptr;

  m_sharedBufs[ PIC_ORIGINAL ]     = nullptr;

  m_sharedBufs[ PIC_FILT_ORIGINAL ] = nullptr;

}

void Picture::createEncodingBuffers()

{

  CHECK( !cs, "Coding structure is required at this point!" );

  if( !m_picBufs[PIC_RECONSTRUCTION].valid() )

  {

    m_picBufs[PIC_RECONSTRUCTION].create( chromaFormat, Area( lumaPos(), lumaSize() ), cs->sps->CTUSize, margin, MEMORY_ALIGN_DEF_SIZE );

  }

  cs->createMotionBuf();

  if( cs->sps->temporalMVPEnabled )

  {

    cs->createColocatedMotionBuf();

  }

  cs->rebindPicBufs();

}

void Picture::releaseEncodingBuffers()

{

  m_picBufs[PIC_RECONSTRUCTION].destroy();

  if( cs )

  {

    cs->destroyMotionBuf();

    cs->rebindPicBufs();

  }

}

const CPelBuf     Picture::getOrigBufPrev (const CompArea &blk, const PrevFrameType type) const { return (m_bufsOrigPrev[ type ] && blk.valid() ? m_bufsOrigPrev[ type ]->getBuf (blk) : PelBuf()); }

const CPelUnitBuf Picture::getOrigBufPrev (const PrevFrameType type) const { return (m_bufsOrigPrev[ type ] ? *m_bufsOrigPrev[ type ] : PelUnitBuf()); }

const CPelBuf     Picture::getOrigBufPrev (const ComponentID compID, const PrevFrameType type) const { return (m_bufsOrigPrev[ type ] ? m_bufsOrigPrev[ type ]->getBuf (compID) : PelBuf()); }

void Picture::finalInit( const VPS& _vps, const SPS& sps, const PPS& pps, PicHeader* picHeader, XUCache& unitCache, std::mutex* mutex, APS** alfAps )

{

  for( auto &sei : SEIs )

  {

    delete sei;

  }

  SEIs.clear();

  for( size_t i = 0; i < slices.size(); i++ )

  {

    delete slices[i];

  }

  slices.clear();

  ctuSlice.clear();

  ctuSlice.resize( pps.pcv->sizeInCtus, nullptr );

  const ChromaFormat chromaFormatIDC = sps.chromaFormatIdc;

  const int          iWidth  = pps.picWidthInLumaSamples;

  const int          iHeight = pps.picHeightInLumaSamples;

  if( cs )

  {

    CHECK( cs->sps != &sps,  "picture initialization error: sps changed" );

    CHECK( cs->vps != &_vps, "picture initialization error: vps changed" );

  }

  else

  {

    cs = new CodingStructure( unitCache, mutex );

    cs->pps = &pps;

    cs->sps = &sps;

    cs->vps = &_vps;

    cs->createPicLevel( UnitArea( chromaFormatIDC, Area( 0, 0, iWidth, iHeight )), pps.pcv );

  }

  cs->picture   = this;

  cs->lumaCS    = cs;

  cs->slice     = nullptr;  // the slices for this picture have not been set at this point. update cs->slice after swapSliceObject()

  cs->picHeader = picHeader;

  if( alfAps )

  {

    memcpy( cs->alfAps, alfAps, sizeof( cs->alfAps ) );

  }

  cs->pcv     = pps.pcv;

  vps         = &_vps;

  dci         = nullptr;

  if( !m_tileColsDone )

  {

    m_tileColsDone = new std::vector<std::atomic<int>> ( pps.pcv->heightInCtus );

  }

  std::fill( m_tileColsDone->begin(), m_tileColsDone->end(), 0 );

  sliceDataStreams.clear();

  sliceDataNumBins = 0;

}

void Picture::setSccFlags( const VVEncCfg* encCfg )

{

  useME      = encCfg->m_motionEstimationSearchMethodSCC > 0                          && isSccStrong;

  useTS      = encCfg->m_TS == 1                || ( encCfg->m_TS == 2                && isSccWeak );

  useBDPCM   = encCfg->m_useBDPCM == 1          || ( encCfg->m_useBDPCM == 2          && isSccWeak );

  useMCTF    = encCfg->m_vvencMCTF.MCTF == 1    || ( encCfg->m_vvencMCTF.MCTF == 2    && ! isSccStrong );

  useIBC     = encCfg->m_IBCMode == 1           || ( encCfg->m_IBCMode == 2           && isSccStrong );

  useSAO     = encCfg->m_bUseSAO                && ( !encCfg->m_saoScc                || isSccWeak );

  useSelectiveRdoq = encCfg->m_useSelectiveRDOQ == 2 ? !isSccWeak : !!encCfg->m_useSelectiveRDOQ;

  useNumRefs = isSccStrong;

  useFastMrg = isSccStrong ? 0 : std::max(0, encCfg->m_useFastMrg - 2);

  useQtbttSpeedUpMode = encCfg->m_qtbttSpeedUpMode;

  if( ( encCfg->m_qtbttSpeedUpMode & 2 ) && isSccStrong )

  {

    useQtbttSpeedUpMode &= ~1;

  }

}

Slice* Picture::allocateNewSlice()

{

  slices.push_back( new Slice );

  Slice& slice = *slices.back();

  slice.pic     = this;

  slice.pps     = cs->pps;

  slice.sps     = cs->sps;

  slice.vps     = cs->vps;

  memcpy( slice.alfAps, cs->alfAps, sizeof(cs->alfAps) );

  if( slices.size() >= 2 )

  {

    slice.copySliceInfo( slices[ slices.size() - 2 ] );

  }

  return slices.back();

}

Slice* Picture::swapSliceObject( Slice*  p, uint32_t i )

{

  p->pic     = this;

  p->pps     = cs->pps;

  p->sps     = cs->sps;

  p->vps     = cs->vps;

  memcpy( p->alfAps, cs->alfAps, sizeof(cs->alfAps) );

  Slice*  pTmp = slices[ i ];

  slices[ i ] = p;

  pTmp->pic = ( nullptr );

  pTmp->sps = ( nullptr );

  pTmp->pps = ( nullptr );

  memset( pTmp->alfAps, 0, sizeof( *pTmp->alfAps ) * ALF_CTB_MAX_NUM_APS );

  return pTmp;

}

void Picture::extendPicBorder()

{

  if ( isBorderExtended )

  {

    return;

  }

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

  {

    ComponentID compID = ComponentID( comp );

    PelBuf p = m_picBufs[ PIC_RECONSTRUCTION ].get( compID );

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

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

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

    Pel*  pi = piTxt;

    // do left and right margins

      for (int y = 0; y < p.height; y++)

      {

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

        {

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

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

        }

        pi += p.stride;

      }

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

    pi -= (p.stride + xmargin);

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

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

    {

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

    }

    // pi is still (-marginX, height-1)

    pi -= ((p.height-1) * p.stride);

    // pi is now (-marginX, 0)

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

    {

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

    }

  }

  isBorderExtended = true;

}

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

{

  if( chromaFormat == CHROMA_400 )

  {

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

  }

  else

  {

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

  }

}

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

{

  if( chromaFormat == CHROMA_400 )

  {

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

  }

  else

  {

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

  }

}

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

{

  if( chromaFormat == CHROMA_400 )

  {

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

  }

  else

  {

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

  }

}

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

{

  if( chromaFormat == CHROMA_400 )

  {

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

  }

  else

  {

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

  }

}

void Picture::resizeAlfCtuBuffers( int numEntries )

{

  for( int compIdx = 0; compIdx < MAX_NUM_COMP; compIdx++ )

  {

    m_alfCtuEnabled[compIdx].resize( numEntries );

    std::fill( m_alfCtuEnabled[compIdx].begin(), m_alfCtuEnabled[compIdx].end(), 0 );

  }

  m_alfCtbFilterIndex.resize(numEntries);

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

  {

    m_alfCtbFilterIndex[i] = 0;

  }

  for( int compIdx = 1; compIdx < MAX_NUM_COMP; compIdx++ )

  {

    m_alfCtuAlternative[compIdx].resize( numEntries );

    std::fill( m_alfCtuAlternative[compIdx].begin(), m_alfCtuAlternative[compIdx].end(), 0 );

  }

}

} // namespace vvenc

//! \}