Initial community commit

Src/Plugins/DSP/dsp_sps/dxi/ParamEnvelope.h

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