source: SHVCSoftware/branches/SHM-dev/source/Lib/TLibCommon/TComMv.h

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/** \file     TComMv.h
    \brief    motion vector class (header)
*/

#ifndef __TCOMMV__
#define __TCOMMV__

#include "CommonDef.h"

//! \ingroup TLibCommon
//! \{

// ====================================================================================================================
// Class definition
// ====================================================================================================================

/// basic motion vector class
class TComMv
{
private:
  Short m_iHor;     ///< horizontal component of motion vector
  Short m_iVer;     ///< vertical component of motion vector

public:

  // ------------------------------------------------------------------------------------------------------------------
  // constructors
  // ------------------------------------------------------------------------------------------------------------------

  TComMv() :
  m_iHor(0),
  m_iVer(0)
  {
  }

  TComMv( Short iHor, Short iVer ) :
  m_iHor(iHor),
  m_iVer(iVer)
  {
  }

  // ------------------------------------------------------------------------------------------------------------------
  // set
  // ------------------------------------------------------------------------------------------------------------------

  Void  set       ( Short iHor, Short iVer)     { m_iHor = iHor;  m_iVer = iVer;            }
  Void  setHor    ( Short i )                   { m_iHor = i;                               }
  Void  setVer    ( Short i )                   { m_iVer = i;                               }
  Void  setZero   ()                            { m_iHor = m_iVer = 0;  }

  // ------------------------------------------------------------------------------------------------------------------
  // get
  // ------------------------------------------------------------------------------------------------------------------

  Int   getHor    () const { return m_iHor;          }
  Int   getVer    () const { return m_iVer;          }
  Int   getAbsHor () const { return abs( m_iHor );   }
  Int   getAbsVer () const { return abs( m_iVer );   }

  // ------------------------------------------------------------------------------------------------------------------
  // operations
  // ------------------------------------------------------------------------------------------------------------------

  const TComMv& operator += (const TComMv& rcMv)
  {
    m_iHor += rcMv.m_iHor;
    m_iVer += rcMv.m_iVer;
    return  *this;
  }

  const TComMv& operator-= (const TComMv& rcMv)
  {
    m_iHor -= rcMv.m_iHor;
    m_iVer -= rcMv.m_iVer;
    return  *this;
  }

#if !ME_ENABLE_ROUNDING_OF_MVS
  const TComMv& operator>>= (const Int i)
  {
    m_iHor >>= i;
    m_iVer >>= i;
    return  *this;
  }
#endif

#if ME_ENABLE_ROUNDING_OF_MVS
  //! shift right with rounding
  Void divideByPowerOf2 (const Int i)
  {
    Int offset = (i == 0) ? 0 : 1 << (i - 1);
    m_iHor += offset;
    m_iVer += offset;

    m_iHor >>= i;
    m_iVer >>= i;
  }
#endif

  const TComMv& operator<<= (const Int i)
  {
    m_iHor <<= i;
    m_iVer <<= i;
    return  *this;
  }

  const TComMv operator - ( const TComMv& rcMv ) const
  {
    return TComMv( m_iHor - rcMv.m_iHor, m_iVer - rcMv.m_iVer );
  }

  const TComMv operator + ( const TComMv& rcMv ) const
  {
    return TComMv( m_iHor + rcMv.m_iHor, m_iVer + rcMv.m_iVer );
  }

  Bool operator== ( const TComMv& rcMv ) const
  {
    return (m_iHor==rcMv.m_iHor && m_iVer==rcMv.m_iVer);
  }

  Bool operator!= ( const TComMv& rcMv ) const
  {
    return (m_iHor!=rcMv.m_iHor || m_iVer!=rcMv.m_iVer);
  }

  const TComMv scaleMv( Int iScale ) const
  {
    Int mvx = Clip3( -32768, 32767, (iScale * getHor() + 127 + (iScale * getHor() < 0)) >> 8 );
    Int mvy = Clip3( -32768, 32767, (iScale * getVer() + 127 + (iScale * getVer() < 0)) >> 8 );
    return TComMv( mvx, mvy );
  }
#if SVC_EXTENSION
  const TComMv scaleMv( Int iScaleX, Int iScaleY ) const
  {
    Int mvx = iScaleX == MV_SCALING_FACTOR_1X ? getHor() : Clip3( -32768, 32767, (iScaleX * getHor() + 127 + (iScaleX * getHor() < 0)) >> 8 );
    Int mvy = iScaleY == MV_SCALING_FACTOR_1X ? getVer() : Clip3( -32768, 32767, (iScaleY * getVer() + 127 + (iScaleY * getVer() < 0)) >> 8 );
    return TComMv( mvx, mvy );
  }
#endif
};// END CLASS DEFINITION TComMV

//! \}

#endif // __TCOMMV__