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/** \file     Unit.cpp

 *  \brief    defines unit as a set of blocks and basic unit types (coding, prediction, transform)

 */

#include "Unit.h"

#include "Picture.h"

#include "UnitTools.h"

#include "UnitPartitioner.h"

//! \ingroup CommonLib

//! \{

namespace vvenc {

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

 // block method definitions

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

void CompArea::xRecalcLumaToChroma()

{

  const uint32_t csx = getComponentScaleX(compID, chromaFormat);

  const uint32_t csy = getComponentScaleY(compID, chromaFormat);

  x      >>= csx;

  y      >>= csy;

  width  >>= csx;

  height >>= csy;

}

Position CompArea::chromaPos() const

{

  if (isLuma(compID))

  {

    uint32_t scaleX = getComponentScaleX(compID, chromaFormat);

    uint32_t scaleY = getComponentScaleY(compID, chromaFormat);

    return Position(x >> scaleX, y >> scaleY);

  }

  else

  {

    return *this;

  }

}

Size CompArea::lumaSize() const

{

  if( isChroma( compID ) )

  {

    uint32_t scaleX = getComponentScaleX( compID, chromaFormat );

    uint32_t scaleY = getComponentScaleY( compID, chromaFormat );

    return Size( width << scaleX, height << scaleY );

  }

  else

  {

    return *this;

  }

}

Size CompArea::chromaSize() const

{

  if( isLuma( compID ) )

  {

    uint32_t scaleX = getComponentScaleX( compID, chromaFormat );

    uint32_t scaleY = getComponentScaleY( compID, chromaFormat );

    return Size( width >> scaleX, height >> scaleY );

  }

  else

  {

    return *this;

  }

}

Position CompArea::lumaPos() const

{

  if( isChroma( compID ) )

  {

    uint32_t scaleX = getComponentScaleX( compID, chromaFormat );

    uint32_t scaleY = getComponentScaleY( compID, chromaFormat );

    return Position( x << scaleX, y << scaleY );

  }

  else

  {

    return *this;

  }

}

Position CompArea::compPos( const ComponentID compID ) const

{

  return isLuma( compID ) ? lumaPos() : chromaPos();

}

Position CompArea::chanPos( const ChannelType chType ) const

{

  return isLuma( chType ) ? lumaPos() : chromaPos();

}

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

// unit method definitions

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

UnitArea::UnitArea(const ChromaFormat _chromaFormat) : chromaFormat(_chromaFormat) { }

UnitArea::UnitArea(const ChromaFormat _chromaFormat, const Area& _area) : chromaFormat(_chromaFormat), blocks(getNumberValidComponents(_chromaFormat))

{

  const uint32_t numCh = getNumberValidComponents(chromaFormat);

  for (uint32_t i = 0; i < numCh; i++)

  {

    new (&blocks[i]) CompArea(ComponentID(i), chromaFormat, _area, true);

  }

}

UnitArea::UnitArea(const ChromaFormat _chromaFormat, const CompArea&  blkY) : chromaFormat(_chromaFormat), blocks { blkY } {}

UnitArea::UnitArea(const ChromaFormat _chromaFormat,       CompArea&& blkY) : chromaFormat(_chromaFormat), blocks { std::forward<CompArea>(blkY) } {}

UnitArea::UnitArea(const ChromaFormat _chromaFormat, const CompArea&  blkY, const CompArea& blkCb, const CompArea& blkCr)  : chromaFormat(_chromaFormat), blocks { blkY, blkCb, blkCr } {}

UnitArea::UnitArea(const ChromaFormat _chromaFormat,       CompArea&& blkY,      CompArea&& blkCb,      CompArea&& blkCr) : chromaFormat(_chromaFormat), blocks { std::forward<CompArea>(blkY), std::forward<CompArea>(blkCb), std::forward<CompArea>(blkCr) } {}

bool UnitArea::contains(const UnitArea& other) const

{

  bool ret = true;

  bool any = false;

  for( const auto &blk : other.blocks )

  {

    if( blk.valid() && blocks[blk.compID].valid() )

    {

      ret &= blocks[blk.compID].contains( blk );

      any = true;

    }

  }

  return any && ret;

}

bool UnitArea::contains( const UnitArea& other, const ChannelType chType ) const

{

  bool ret = true;

  bool any = false;

  for( const auto &blk : other.blocks )

  {

    if( toChannelType( blk.compID ) == chType && blk.valid() && blocks[blk.compID].valid() )

    {

      ret &= blocks[blk.compID].contains( blk );

      any = true;

    }

  }

  return any && ret;

}

void UnitArea::repositionTo(const UnitArea& unitArea)

{

  for(uint32_t i = 0; i < blocks.size(); i++)

  {

    blocks[i].repositionTo(unitArea.blocks[i]);

  }

}

const UnitArea UnitArea::singleComp(const ComponentID compID) const

{

  UnitArea ret(chromaFormat);

  for (const auto &blk : blocks)

  {

    if (blk.compID == compID)

    {

      ret.blocks.push_back(blk);

    }

    else

    {

      ret.blocks.push_back(CompArea());

    }

  }

  return ret;

}

const UnitArea UnitArea::singleChan(const ChannelType chType) const

{

  UnitArea ret(chromaFormat);

  for (const auto &blk : blocks)

  {

    if (toChannelType(blk.compID) == chType)

    {

      ret.blocks.push_back(blk);

    }

    else

    {

      ret.blocks.push_back(CompArea());

    }

  }

  return ret;

}

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

// coding unit method definitions

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

CodingUnit::CodingUnit(const UnitArea& unit)                                : UnitArea(unit),                 cs(nullptr), slice(nullptr), chType( CH_L ), next(nullptr), firstTU(nullptr), lastTU(nullptr) { initData(); initPuData(); }

CodingUnit::CodingUnit(const ChromaFormat _chromaFormat, const Area& _area) : UnitArea(_chromaFormat, _area), cs(nullptr), slice(nullptr), chType( CH_L ), next(nullptr), firstTU(nullptr), lastTU(nullptr) { initData(); initPuData(); }

CodingUnit& CodingUnit::operator=( const CodingUnit& other )

{

  slice             = other.slice;

  predMode          = other.predMode;

  qtDepth           = other.qtDepth;

  depth             = other.depth;

  btDepth           = other.btDepth;

  mtDepth           = other.mtDepth;

  splitSeries       = other.splitSeries;

  skip              = other.skip;

  mmvdSkip          = other.mmvdSkip;

  affine            = other.affine;

  affineType        = other.affineType;

  colorTransform    = other.colorTransform;

  geo               = other.geo;

  geo               = other.geo;

  bdpcmM[CH_L]      = other.bdpcmM[CH_L];

  bdpcmM[CH_C]      = other.bdpcmM[CH_C];

  qp                = other.qp;

  chromaQpAdj       = other.chromaQpAdj;

  rootCbf           = other.rootCbf;

  sbtInfo           = other.sbtInfo;

  mtsFlag           = other.mtsFlag;

  lfnstIdx          = other.lfnstIdx;

  tileIdx           = other.tileIdx;

  imv               = other.imv;

  imvNumCand        = other.imvNumCand;

  BcwIdx            = other.BcwIdx;

  smvdMode          = other.smvdMode;

  ispMode           = other.ispMode;

  mipFlag           = other.mipFlag;

  treeType          = other.treeType;

  modeType          = other.modeType;

  modeTypeSeries    = other.modeTypeSeries;

  const IntraPredictionData& ipd = other;

  *this = ipd;

  const InterPredictionData& tpd = other;

  *this = tpd;

  return *this;

}

void CodingUnit::initData()

{

  predMode          = NUMBER_OF_PREDICTION_MODES;

  qtDepth           = 0;

  depth             = 0;

  btDepth           = 0;

  mtDepth           = 0;

  splitSeries       = 0;

  skip              = false;

  mmvdSkip          = false;

  affine            = false;

  affineType        = 0;

  colorTransform    = false;

  geo               = false;

  bdpcmM[CH_L]      = 0;

  bdpcmM[CH_C]      = 0;

  qp                = 0;

  chromaQpAdj       = 0;

  rootCbf           = true;

  sbtInfo           = 0;

  mtsFlag           = 0;

  lfnstIdx          = 0;

  tileIdx           = 0;

  imv               = IMV_OFF;

  imvNumCand        = 0;

  BcwIdx            = BCW_DEFAULT;

  smvdMode          = 0;

  ispMode           = 0;

  mipFlag           = false;

  treeType          = TREE_D;

  modeType          = MODE_TYPE_ALL;

  modeTypeSeries    = 0;

  mcControl         = 0;

}

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

// prediction unit method definitions

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

void CodingUnit::initPuData()

{

  // intra data - need this default initialization for PCM

  intraDir[0]       = DC_IDX;

  intraDir[1]       = PLANAR_IDX;

  multiRefIdx       = 0;

  mipTransposedFlag = false;

  // inter data

  mergeFlag         = false;

  ciip              = false;

  mvRefine          = false;

  mmvdMergeFlag     = false;

  mergeIdx          = MAX_UCHAR;

  geoSplitDir       = MAX_UCHAR;

  geoMergeIdx       = { MAX_SCHAR, MAX_SCHAR };

  mcControl         = 0;

  interDir          = MAX_UCHAR;

  mmvdMergeIdx.val  = MmvdIdx::INVALID;

  mergeType         = MRG_TYPE_DEFAULT_N;

  if( mvdL0SubPu )

  {

    int maxDmvrMvds = std::max<int>( 1, lwidth() >> DMVR_SUBCU_SIZE_LOG2 ) * std::max<int>( 1, lheight() >> DMVR_SUBCU_SIZE_LOG2 );

    for (uint32_t i = 0; i < maxDmvrMvds; i++)

    {

      mvdL0SubPu[i].setZero();

    }

  }

  for (uint32_t i = 0; i < NUM_REF_PIC_LIST_01; i++)

  {

    mvpIdx[i] = MAX_UCHAR;

    mvpNum[i] = MAX_UCHAR;

    refIdx[i] = -1;

    for( uint32_t j = 0; j < 3; j++ )

    {

      mvd[i][j].setZero();

      mv [i][j].setZero();

    }

  }

}

CodingUnit& CodingUnit::operator=( const IntraPredictionData& other )

{

  for( uint32_t i = 0; i < MAX_NUM_CH; i++ )

  {

    intraDir[ i ] = other.intraDir[ i ];

  }

  mipTransposedFlag = other.mipTransposedFlag;

  multiRefIdx       = other.multiRefIdx;

  return *this;

}

CodingUnit& CodingUnit::operator=( const InterPredictionData& other )

{

  mergeFlag         = other.mergeFlag;

  mergeIdx          = other.mergeIdx;

  geoSplitDir       = other.geoSplitDir;

  geoMergeIdx       = other.geoMergeIdx;

  mmvdMergeFlag     = other.mmvdMergeFlag;

  mmvdMergeIdx      = other.mmvdMergeIdx;

  interDir          = other.interDir;

  mergeType         = other.mergeType;

  mvRefine          = other.mvRefine;

  if( other.mergeFlag && mvdL0SubPu )

  {

    const int maxDmvrMvds = std::max<int>( 1, lwidth() >> DMVR_SUBCU_SIZE_LOG2 ) * std::max<int>( 1, lheight() >> DMVR_SUBCU_SIZE_LOG2 );

    memcpy( mvdL0SubPu, other.mvdL0SubPu, sizeof( Mv ) * maxDmvrMvds );

  }

  for (uint32_t i = 0; i < NUM_REF_PIC_LIST_01; i++)

  {

    mvpIdx[i]   = other.mvpIdx[i];

    mvpNum[i]   = other.mvpNum[i];

    refIdx[i]   = other.refIdx[i];

    for( uint32_t j = 0; j < 3; j++ )

    {

      mvd[i][j] = other.mvd[i][j];

      mv [i][j] = other.mv [i][j];

    }

  }

  ciip = other.ciip;

  return *this;

}

CodingUnit& CodingUnit::operator=( const MotionInfo& mi )

{

  interDir = mi.interDir();

  for( uint32_t i = 0; i < NUM_REF_PIC_LIST_01; i++ )

  {

    refIdx[i] = mi.miRefIdx[i];

    mv [i][0] = mi.mv[i];

  }

  return *this;

}

const MotionInfo& CodingUnit::getMotionInfo() const

{

  return cs->getMotionInfo( lumaPos() );

}

const MotionInfo& CodingUnit::getMotionInfo( const Position& pos ) const

{

  CHECKD( !Y().contains( pos ), "Trying to access motion info outsied of PU" );

  return cs->getMotionInfo( pos );

}

MotionBuf CodingUnit::getMotionBuf()

{

  return cs->getMotionBuf( *this );

}

CMotionBuf CodingUnit::getMotionBuf() const

{

  return cs->getMotionBuf( *this );

}

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

// transform unit method definitions

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

TransformUnit::TransformUnit(const UnitArea& unit) : UnitArea(unit), cu(nullptr), cs(nullptr), chType( CH_L ), next( nullptr )

{

  for( unsigned i = 0; i < MAX_NUM_TBLOCKS; i++ )

  {

    m_coeffs[i] = nullptr;

  }

  initData();

}

TransformUnit::TransformUnit(const ChromaFormat _chromaFormat, const Area& _area) : UnitArea(_chromaFormat, _area), cu(nullptr), cs(nullptr), chType( CH_L ), next( nullptr )

{

  for( unsigned i = 0; i < MAX_NUM_TBLOCKS; i++ )

  {

    m_coeffs[i] = nullptr;

  }

  initData();

}

void TransformUnit::initData()

{

  for( unsigned i = 0; i < MAX_NUM_TBLOCKS; i++ )

  {

    cbf[i]      = 0;

    mtsIdx[i]   = MTS_DCT2_DCT2;

    lastPos[i]  = 0;

  }

  depth       = 0;

  noResidual  = false;

  jointCbCr   = 0;

  chromaAdj   = 0;

}

void TransformUnit::init(TCoeffSig** coeffs)

{

  uint32_t numBlocks = getNumberValidComponents( chromaFormat );

  for (uint32_t i = 0; i < numBlocks; i++)

  {

    m_coeffs[i] = coeffs[i];

  }

}

TransformUnit& TransformUnit::operator=( const TransformUnit& other )

{

  CHECK( chromaFormat != other.chromaFormat, "Incompatible formats" );

  unsigned numBlocks = getNumberValidTBlocks(*cs->pcv);

  for( unsigned i = 0; i < numBlocks; i++ )

  {

    CHECKD( blocks[i].area() != other.blocks[i].area(), "Transformation units cover different areas" );

    cbf[i]      = other.cbf[i];

    bool cpyRsi = other.cbf[i] || ( i && other.jointCbCr && numBlocks > 1 && ( TU::getCbf( other, COMP_Cb ) || TU::getCbf( other, COMP_Cr ) ) );

    if( m_coeffs[i] && other.m_coeffs[i] && m_coeffs[i] != other.m_coeffs[i] && cpyRsi )

    {

      uint32_t area = blocks[i].area();

      memcpy( m_coeffs[i], other.m_coeffs[i], sizeof( TCoeffSig ) * area );

    }

    mtsIdx[i]   = other.mtsIdx[i];

    lastPos[i]  = other.lastPos[i];

  }

  depth         = other.depth;

  noResidual    = other.noResidual;

  jointCbCr     = other.jointCbCr;

  return *this;

}

void TransformUnit::copyComponentFrom( const TransformUnit& other, const ComponentID i )

{

  CHECK( chromaFormat != other.chromaFormat, "Incompatible formats" );

  CHECKD( blocks[i].area() != other.blocks[i].area(), "Transformation units cover different areas" );

  bool cpyRsi = other.cbf[i] || ( i && other.jointCbCr && blocks.size() > 1 && ( TU::getCbf( other, COMP_Cb ) || TU::getCbf( other, COMP_Cr ) ) );

  if( m_coeffs[i] && other.m_coeffs[i] && m_coeffs[i] != other.m_coeffs[i] && cpyRsi )

  {

    uint32_t area = blocks[i].area();

    memcpy( m_coeffs[i], other.m_coeffs[i], sizeof( TCoeffSig ) * area );

  }

  cbf[i]      = other.cbf[i];

  depth       = other.depth;

  mtsIdx[i]   = other.mtsIdx[i];

  noResidual  = other.noResidual;

  jointCbCr   = isChroma( i ) ? other.jointCbCr : jointCbCr;

  lastPos[i]  = other.lastPos[i];

}

void TransformUnit::checkTuNoResidual( unsigned idx )

{

  if( CU::getSbtIdx( cu->sbtInfo ) == SBT_OFF_DCT )

  {

    return;

  }

  if( ( CU::getSbtPos( cu->sbtInfo ) == SBT_POS0 && idx == 1 ) || ( CU::getSbtPos( cu->sbtInfo ) == SBT_POS1 && idx == 0 ) )

  {

    noResidual = true;

  }

}

int TransformUnit::getTbAreaAfterCoefZeroOut(ComponentID compID) const

{

  int tbArea = blocks[compID].width * blocks[compID].height;

  int tbZeroOutWidth = blocks[compID].width;

  int tbZeroOutHeight = blocks[compID].height;

  if (cs->sps->MTS && cu->sbtInfo != 0 && blocks[compID].width <= 32 && blocks[compID].height <= 32 && compID == COMP_Y)

  {

    tbZeroOutWidth = (blocks[compID].width == 32) ? 16 : tbZeroOutWidth;

    tbZeroOutHeight = (blocks[compID].height == 32) ? 16 : tbZeroOutHeight;

  }

  tbZeroOutWidth = std::min<int>(JVET_C0024_ZERO_OUT_TH, tbZeroOutWidth);

  tbZeroOutHeight = std::min<int>(JVET_C0024_ZERO_OUT_TH, tbZeroOutHeight);

  tbArea = tbZeroOutWidth * tbZeroOutHeight;

  return tbArea;

}

} // namespace vvenc

//! \}