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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ------------------------------------------------------------------------------------------- */ /** \file Mv.h \brief motion vector class (header) */ #pragma once #include "CommonDef.h" namespace vvdec { class SPS; class PPS; struct Position; struct Size; //! \ingroup CommonLib //! \{ // ==================================================================================================================== // Class definition // ==================================================================================================================== enum MvPrecision { MV_PRECISION_4PEL = 0, // 4-pel MV_PRECISION_INT = 2, // 1-pel, shift 2 bits from 4-pel MV_PRECISION_HALF = 3, // 1/2-pel MV_PRECISION_QUARTER = 4, // 1/4-pel (the precision of regular MV difference signaling), shift 4 bits from 4-pel MV_PRECISION_INTERNAL = 6, // 1/16-pel (the precision of internal MV), shift 6 bits from 4-pel }; /// basic motion vector class class Mv { private: static const MvPrecision m_amvrPrecision[4]; static const int mvClipPeriod = (1 << MV_BITS); static const int halMvClipPeriod = (1 << (MV_BITS - 1)); public: int hor; ///< horizontal component of motion vector int ver; ///< vertical component of motion vector // ------------------------------------------------------------------------------------------------------------------ // constructors // ------------------------------------------------------------------------------------------------------------------ Mv( ) : hor( 0 ), ver( 0 ) {} Mv( int iHor, int iVer ) : hor( iHor ), ver( iVer ) {} // ------------------------------------------------------------------------------------------------------------------ // set // ------------------------------------------------------------------------------------------------------------------ void set ( int iHor, int iVer) { hor = iHor; ver = iVer; } void setHor ( int i ) { hor = i; } void setVer ( int i ) { ver = i; } void setZero () { hor = ver = 0; } // ------------------------------------------------------------------------------------------------------------------ // get // ------------------------------------------------------------------------------------------------------------------ int getHor () const { return hor; } int getVer () const { return ver; } int getAbsHor () const { return abs( hor ); } int getAbsVer () const { return abs( ver ); } // ------------------------------------------------------------------------------------------------------------------ // operations // ------------------------------------------------------------------------------------------------------------------ const Mv& operator += ( const Mv& _rcMv ) { hor += _rcMv.hor; ver += _rcMv.ver; return *this; } const Mv& operator-= (const Mv& _rcMv) { hor -= _rcMv.hor; ver -= _rcMv.ver; return *this; } const Mv& operator<<= (const int i) { hor *= 1<>= ( const int i ) { if (i != 0) { const int offset = (1 << (i - 1)); hor = (hor + offset - (hor >= 0)) >> i; ver = (ver + offset - (ver >= 0)) >> i; } return *this; } const Mv operator - ( const Mv& rcMv ) const { return Mv( hor - rcMv.hor, ver - rcMv.ver ); } const Mv operator + ( const Mv& rcMv ) const { return Mv( hor + rcMv.hor, ver + rcMv.ver ); } bool operator== ( const Mv& rcMv ) const { return ( hor == rcMv.hor && ver == rcMv.ver ); } bool operator!= ( const Mv& rcMv ) const { return !( *this == rcMv ); } const Mv scaleMv( int iScale ) const { const int mvx = Clip3( -131072, 131071, (iScale * getHor() + 128 - (iScale * getHor() >= 0)) >> 8); const int mvy = Clip3( -131072, 131071, (iScale * getVer() + 128 - (iScale * getVer() >= 0)) >> 8); return Mv( mvx, mvy ); } void changePrecision(const MvPrecision& src, const MvPrecision& dst) { const int shift = (int)dst - (int)src; if (shift >= 0) { *this <<= shift; } else { const int rightShift = -shift; const int nOffset = 1 << (rightShift - 1); hor = hor >= 0 ? (hor + nOffset - 1) >> rightShift : (hor + nOffset) >> rightShift; ver = ver >= 0 ? (ver + nOffset - 1) >> rightShift : (ver + nOffset) >> rightShift; } } void changePrecisionAmvr(const int amvr, const MvPrecision& dst) { changePrecision(m_amvrPrecision[amvr], dst); } void roundToPrecision(const MvPrecision& src, const MvPrecision& dst) { changePrecision(src, dst); changePrecision(dst, src); } void roundToAmvrSignalPrecision(const MvPrecision& src, const int amvr) { roundToPrecision(src, m_amvrPrecision[amvr]); } Mv getSymmvdMv(const Mv& curMvPred, const Mv& tarMvPred) { return Mv(tarMvPred.hor - hor + curMvPred.hor, tarMvPred.ver - ver + curMvPred.ver); } void clipToStorageBitDepth() { hor = Clip3( -( 1 << 17 ), ( 1 << 17 ) - 1, hor ); ver = Clip3( -( 1 << 17 ), ( 1 << 17 ) - 1, ver ); } void mvCliptoStorageBitDepth() // periodic clipping { hor = (hor + mvClipPeriod) & (mvClipPeriod - 1); hor = (hor >= halMvClipPeriod) ? (hor - mvClipPeriod) : hor; ver = (ver + mvClipPeriod) & (mvClipPeriod - 1); ver = (ver >= halMvClipPeriod) ? (ver - mvClipPeriod) : ver; } };// END CLASS DEFINITION MV extern void(*clipMv) ( Mv& rcMv, const Position& pos, const struct Size& size, const SPS& sps, const PPS& pps ); void clipMvInPic ( Mv& rcMv, const Position& pos, const struct Size& size, const SPS& sps, const PPS& pps ); void clipMvInSubpic ( Mv& rcMv, const Position& pos, const struct Size& size, const SPS& sps, const PPS& pps ); bool wrapClipMv ( Mv& rcMv, const Position& pos, const struct Size& size, const SPS& sps, const PPS& pps ); void roundAffineMv( int& mvx, int& mvy, int nShift ); }