UnitPartitioner.cpp

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/** \file     UnitPartitioner.h
 *  \brief    Provides a class for partitioning management
 */

#include "UnitPartitioner.h"

#include "CodingStructure.h"
#include "Unit.h"
#include "Slice.h"
#include "UnitTools.h"
#include "Picture.h"


PartLevel::PartLevel()
: split               ( CU_DONT_SPLIT )
, parts               (               )
, idx                 ( 0u            )
, checkdIfImplicit    ( false         )
, isImplicit          ( false         )
, implicitSplit       ( CU_DONT_SPLIT )
, firstSubPartSplit   ( CU_DONT_SPLIT )
, canQtSplit          ( true          )
#if JVET_M0113_M0188_QG_SIZE
, qgEnable            ( true          )
, qgChromaEnable      ( true          )
#endif
{
}

PartLevel::PartLevel( const PartSplit _split, const Partitioning& _parts )
: split               ( _split        )
, parts               ( _parts        )
, idx                 ( 0u            )
, checkdIfImplicit    ( false         )
, isImplicit          ( false         )
, implicitSplit       ( CU_DONT_SPLIT )
, firstSubPartSplit   ( CU_DONT_SPLIT )
, canQtSplit          ( true          )
#if JVET_M0113_M0188_QG_SIZE
, qgEnable            ( true          )
, qgChromaEnable      ( true          )
#endif
{
}

PartLevel::PartLevel( const PartSplit _split, Partitioning&& _parts )
: split               ( _split                               )
, parts               ( std::forward<Partitioning>( _parts ) )
, idx                 ( 0u                                   )
, checkdIfImplicit    ( false                                )
, isImplicit          ( false                                )
, implicitSplit       ( CU_DONT_SPLIT                        )
, firstSubPartSplit   ( CU_DONT_SPLIT                        )
, canQtSplit          ( true                                 )
#if JVET_M0113_M0188_QG_SIZE
, qgEnable            ( true                                 )
, qgChromaEnable      ( true                                 )
#endif
{
}

//////////////////////////////////////////////////////////////////////////
// Partitioner class
//////////////////////////////////////////////////////////////////////////

SplitSeries Partitioner::getSplitSeries() const
{
  SplitSeries splitSeries = 0;
  SplitSeries depth = 0;

  for( const auto &level : m_partStack )
  {
    if( level.split == CTU_LEVEL ) continue;
    else splitSeries += static_cast< SplitSeries >( level.split ) << ( depth * SPLIT_DMULT );

    depth++;
  }

  return splitSeries;
}

void Partitioner::setCUData( CodingUnit& cu )
{
  cu.depth       = currDepth;
  cu.btDepth     = currBtDepth;
  cu.mtDepth     = currMtDepth;
  cu.qtDepth     = currQtDepth;
  cu.splitSeries = getSplitSeries();
}

void Partitioner::copyState( const Partitioner& other )
{
  m_partStack = other.m_partStack;
  currBtDepth = other.currBtDepth;
  currQtDepth = other.currQtDepth;
  currDepth   = other.currDepth;
  currMtDepth = other.currMtDepth;
  currTrDepth = other.currTrDepth;
#if JVET_M0113_M0188_QG_SIZE
  currSubdiv  = other.currSubdiv;
#endif
  currImplicitBtDepth
              = other.currImplicitBtDepth;
  chType      = other.chType;
#ifdef _DEBUG
  m_currArea  = other.m_currArea;
#endif
}

//////////////////////////////////////////////////////////////////////////
// AdaptiveDepthPartitioner class
//////////////////////////////////////////////////////////////////////////

void AdaptiveDepthPartitioner::setMaxMinDepth( unsigned& minDepth, unsigned& maxDepth, const CodingStructure& cs ) const
{
  unsigned          stdMinDepth = 0;
  unsigned          stdMaxDepth = ( g_aucLog2[cs.sps->getCTUSize()] - g_aucLog2[cs.sps->getMinQTSize( cs.slice->getSliceType(), chType )]);
  const Position    pos         = currArea().blocks[chType].pos();
  const unsigned    curSliceIdx = cs.slice->getIndependentSliceIdx();
#if HEVC_TILES_WPP
  const unsigned    curTileIdx  = cs.picture->tileMap->getTileIdxMap( currArea().lumaPos() );

  const CodingUnit* cuLeft        = cs.getCURestricted( pos.offset( -1,                               0 ), curSliceIdx, curTileIdx, chType );
  const CodingUnit* cuBelowLeft   = cs.getCURestricted( pos.offset( -1, currArea().blocks[chType].height), curSliceIdx, curTileIdx, chType );
  const CodingUnit* cuAbove       = cs.getCURestricted( pos.offset(  0,                              -1 ), curSliceIdx, curTileIdx, chType );
  const CodingUnit* cuAboveRight  = cs.getCURestricted( pos.offset( currArea().blocks[chType].width, -1 ), curSliceIdx, curTileIdx, chType );
#else
  const CodingUnit* cuLeft        = cs.getCURestricted( pos.offset( -1,                               0 ), curSliceIdx, chType );
  const CodingUnit* cuBelowLeft   = cs.getCURestricted( pos.offset( -1, currArea().blocks[chType].height), curSliceIdx, chType );
  const CodingUnit* cuAbove       = cs.getCURestricted( pos.offset(  0,                              -1 ), curSliceIdx, chType );
  const CodingUnit* cuAboveRight  = cs.getCURestricted( pos.offset( currArea().blocks[chType].width, -1 ), curSliceIdx, chType );
#endif

  minDepth = stdMaxDepth;
  maxDepth = stdMinDepth;

  if( cuLeft )
  {
    minDepth = std::min<unsigned>( minDepth, cuLeft->qtDepth );
    maxDepth = std::max<unsigned>( maxDepth, cuLeft->qtDepth );
  }
  else
  {
    minDepth = stdMinDepth;
    maxDepth = stdMaxDepth;
  }

  if( cuBelowLeft )
  {
    minDepth = std::min<unsigned>( minDepth, cuBelowLeft->qtDepth );
    maxDepth = std::max<unsigned>( maxDepth, cuBelowLeft->qtDepth );
  }
  else
  {
    minDepth = stdMinDepth;
    maxDepth = stdMaxDepth;
  }

  if( cuAbove )
  {
    minDepth = std::min<unsigned>( minDepth, cuAbove->qtDepth );
    maxDepth = std::max<unsigned>( maxDepth, cuAbove->qtDepth );
  }
  else
  {
    minDepth = stdMinDepth;
    maxDepth = stdMaxDepth;