154 lines
3.8 KiB
C++
154 lines
3.8 KiB
C++
//====== Copyright © 1996-2004, Valve Corporation, All rights reserved. =======
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//
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// Purpose:
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//
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//=============================================================================
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#ifndef DMETIMEFRAME_H
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#define DMETIMEFRAME_H
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#ifdef _WIN32
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#pragma once
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#endif
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#include "datamodel/dmelement.h"
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#include "datamodel/dmattributevar.h"
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//-----------------------------------------------------------------------------
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// Time classes used to help disambiguate between local + parent time
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//-----------------------------------------------------------------------------
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typedef int LocalTime_t;
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typedef int ParentTime_t;
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class CDmeTimeFrame : public CDmElement
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{
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DEFINE_ELEMENT( CDmeTimeFrame, CDmElement );
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public:
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// Methods of IDmElement
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virtual void OnAttributeChanged( CDmAttribute *pAttribute );
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DmeTime_t ToChildMediaTime( DmeTime_t t, bool bClamp = true ) const;
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DmeTime_t FromChildMediaTime( DmeTime_t t, bool bClamp = true ) const;
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DmeTime_t ToChildMediaDuration( DmeTime_t dt ) const;
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DmeTime_t FromChildMediaDuration( DmeTime_t dt ) const;
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DmeTime_t GetStartTime() const;
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DmeTime_t GetDuration() const;
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DmeTime_t GetTimeOffset() const;
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float GetTimeScale() const;
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DmeTime_t GetStartInChildMediaTime() const;
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DmeTime_t GetEndInChildMediaTime() const;
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void SetStartTime( DmeTime_t startTime );
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void SetDuration( DmeTime_t duration );
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void SetTimeOffset( DmeTime_t offset );
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void SetTimeScale( float flScale );
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void SetEndTime( DmeTime_t endTime, bool bChangeDuration );
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void SetTimeScale( float flScale, DmeTime_t scaleCenter, bool bChangeDuration );
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private:
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CDmaTime m_Start;
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CDmaTime m_Duration;
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CDmaTime m_Offset;
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CDmaVar< float > m_Scale;
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};
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//-----------------------------------------------------------------------------
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// inline methods
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//-----------------------------------------------------------------------------
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inline DmeTime_t CDmeTimeFrame::GetStartTime() const
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{
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return m_Start;
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}
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inline DmeTime_t CDmeTimeFrame::GetDuration() const
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{
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return m_Duration;
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}
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inline DmeTime_t CDmeTimeFrame::GetTimeOffset() const
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{
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return m_Offset;
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}
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inline float CDmeTimeFrame::GetTimeScale() const
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{
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return m_Scale;
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}
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inline void CDmeTimeFrame::SetStartTime( DmeTime_t startTime )
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{
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m_Start = startTime;
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}
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inline void CDmeTimeFrame::SetDuration( DmeTime_t duration )
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{
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Assert( duration >= DMETIME_ZERO ); // if you want a reversed clip, set the timescale negative
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m_Duration = MAX( DMETIME_ZERO, duration );
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}
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inline void CDmeTimeFrame::SetTimeOffset( DmeTime_t offset )
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{
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m_Offset = offset;
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}
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inline void CDmeTimeFrame::SetTimeScale( float flScale )
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{
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m_Scale = flScale;
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}
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//-----------------------------------------------------------------------------
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// Convert back + forth between my media time and child media time
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//-----------------------------------------------------------------------------
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inline DmeTime_t CDmeTimeFrame::ToChildMediaTime( DmeTime_t t, bool bClamp ) const
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{
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t -= m_Start;
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if ( bClamp )
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{
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t.Clamp( DMETIME_ZERO, m_Duration );
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}
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return ( t + m_Offset ) * m_Scale;
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}
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inline DmeTime_t CDmeTimeFrame::FromChildMediaTime( DmeTime_t t, bool bClamp ) const
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{
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t = t / m_Scale - m_Offset;
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if ( bClamp )
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{
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t.Clamp( DMETIME_ZERO, m_Duration );
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}
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return t + m_Start;
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}
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inline DmeTime_t CDmeTimeFrame::ToChildMediaDuration( DmeTime_t dt ) const
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{
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return dt * m_Scale;
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}
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inline DmeTime_t CDmeTimeFrame::FromChildMediaDuration( DmeTime_t dt ) const
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{
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return dt / m_Scale;
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}
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inline DmeTime_t CDmeTimeFrame::GetStartInChildMediaTime() const
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{
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DmeTime_t time = m_Offset.Get() * m_Scale;
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Assert( time == ToChildMediaTime( GetStartTime() ) );
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return time;
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}
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inline DmeTime_t CDmeTimeFrame::GetEndInChildMediaTime() const
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{
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DmeTime_t time = ( m_Offset.Get() + m_Duration.Get() ) * m_Scale;
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Assert( time == ToChildMediaTime( GetStartTime() + GetDuration() ) );
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return time;
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}
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#endif // DMETIMEFRAME_H
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