125 lines
3.9 KiB
C++
125 lines
3.9 KiB
C++
// ParamEnvelope.h: interface for the CParamEnvelope class.
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//
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//////////////////////////////////////////////////////////////////////
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#if !defined(AFX_PARAMENVELOPE_H__F04D0178_4674_45AF_9F7A_5C8206DE4CF6__INCLUDED_)
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#define AFX_PARAMENVELOPE_H__F04D0178_4674_45AF_9F7A_5C8206DE4CF6__INCLUDED_
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#if _MSC_VER > 1000
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#pragma once
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#endif // _MSC_VER > 1000
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////////////////////////////////////////////////////////////////////////////////
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typedef std::vector<MP_ENVELOPE_SEGMENT> EnvelopeSegs;
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////////////////////////////////////////////////////////////////////////////////
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struct ParamInfo
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{
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MP_PARAMINFO mppi; // external parameter info, as presented to the user
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float fInternalMin; // minimum value used by internal processing code
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float fInternalMax; // maximum value used by internal processing code
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const WCHAR* pwszEnumText; // text for enumerations
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float MapToInternal( float fValue ) const;
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float MapToExternal( float fValue ) const;
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};
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////////////////////////////////////////////////////////////////////////////////
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class CParamEnvelope : public CCritSec
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{
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public:
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CParamEnvelope();
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virtual ~CParamEnvelope();
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// Attributes
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public:
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unsigned GetCount() const
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{
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return m_envSegs.size();
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}
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const MP_ENVELOPE_SEGMENT& GetAt( unsigned ix ) const
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{
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return m_envSegs[ ix ];
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}
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// Tell the envelope about the parameter being controlled
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void SetParamInfo( const ParamInfo& info );
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// These methods are called by CMediaParams to manipulate segments in an envelope
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HRESULT AddEnvelope( DWORD cSegments, MP_ENVELOPE_SEGMENT* pEnvelopeSegments, double dSamplesPerRefTime );
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HRESULT FlushEnvelope( REFERENCE_TIME refTimeStart, REFERENCE_TIME refTimeEnd, double dSamplesPerRefTime );
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HRESULT GetEnvelope( DWORD* cSegments, MP_ENVELOPE_SEGMENT* pEnvelopeSegments );
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HRESULT SetParam( float fValue );
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HRESULT GetParam( float* pfValue );
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// Manage UI capture and release
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void BeginCapture() { m_bCaptured = TRUE; }
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void EndCapture() { m_bCaptured = FALSE; }
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// Set the current position, updating current envelope value and deltas
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HRESULT UpdateValuesForRefTime( REFERENCE_TIME rt, long lSampleRate );
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// Check if automation envelopes have been overriden with a specific value
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BOOL IsOverrideActive() const { return m_bOverride || m_bCaptured; }
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// Get the current automation data point
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float GetCurrentValue() const
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{
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if (IsOverrideActive())
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return m_fOverrideValue;
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else
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return m_fEnvelopeValue;
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}
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// Get the current automation deltas (for per-sample rendering)
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HRESULT GetCurrentDeltas( double* pdDelta1, double* pdDelta2 ) const
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{
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if (!m_bValidDeltas)
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return E_FAIL;
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*pdDelta1 = m_dEnvelopeDelta1;
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*pdDelta2 = m_dEnvelopeDelta2;
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return S_OK;
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}
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int IndexForRefTime( REFERENCE_TIME rt ) const;
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private:
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// Stop overriding data
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void stopOverride()
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{
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if (IsOverrideActive() && GetCount() > 0)
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m_bOverride = FALSE;
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}
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// Make sure the automation track is in a state suitable for playback
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void cleanup();
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private:
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ParamInfo m_info; // information about this parameter
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EnvelopeSegs m_envSegs; // the list of envelope segments
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float m_fEnvelopeValue; // our evolving dynamic value
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double m_dEnvelopeDelta1; // 1st delta of current envelope (w.r.t. seconds)
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double m_dEnvelopeDelta2; // 2nd delta of current envelope (w.r.t. seconds)
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BOOL m_bValidDeltas; // TRUE when deltas can be used (e.g. except for sin)
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BOOL m_bOverride; // TRUE while automation point value is overridden
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BOOL m_bCaptured; // TRUE while the captured by the UI
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float m_fOverrideValue; // our override value
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REFERENCE_TIME m_rtRendered; // latest time rendered so far
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private:
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CParamEnvelope( const CParamEnvelope& );
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CParamEnvelope& operator=( const CParamEnvelope& );
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};
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////////////////////////////////////////////////////////////////////////////////
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#endif // !defined(AFX_PARAMENVELOPE_H__F04D0178_4674_45AF_9F7A_5C8206DE4CF6__INCLUDED_)
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