www.pudn.com > aa.rar > COverlayController.h

// 
// COverlayController.h 
// 
 
#ifndef __H_COverlayController__ 
#define __H_COverlayController__ 
 
#include "CBasePixel.h" 
#include "OverlayDefs.h" 
 
class COverlayController 
{ 
protected: 
	CBasePixel *        mPixelConverter; 
	BOOL                mCanDoOverlay;      // Title overlay workable flag 
	BOOL                mIsOverlayByCover; 
	long                mOverlayCounter; 
	double              mDoubleStartTime;   // Actual start and end time 
	double              mDoubleEndTime; 
	long                mOverlayStartTime;  // Using frame index 
	long                mOverlayEndTime; 
 
	// Title property 
	char *              mTitle; 
	unsigned char *     mTitleDIBBits; 
	unsigned char       mColorRed;     // Text color 
	unsigned char       mColorGreen; 
	unsigned char       mColorBlue; 
	SIZE                mTitleSize; 
	POINT               mStartPos;     // Start position to draw text 
	LOGFONT             mTitleFont; 
	BOOL                mIsFontChanged; 
	long                mDIBWidthInBytes; 
 
	// Input video property 
	RGB_FORMAT          mInputColorSpace; 
	long                mImageWidth; 
	long                mImageHeight;        // This is an absolute value 
	long                mImageWidthInBytes;  // the line width in bytes 
	WORD                mImageBitCount; 
	BOOL                mIsBottomUpImage; 
	double              mInputFrameRate; 
 
public: 
	COverlayController(); 
	virtual ~COverlayController(); 
 
	void SetInputColorSpace(RGB_FORMAT inColorSpace); 
	void SetInputVideoInfo(const VIDEOINFOHEADER * inInfoHeader); 
	// If VIDEOINFOHEADER not contain valid frame rate,  
	// using the following method to set an estimated value. 
	void SetEstimatedFrameRate(double inFrameRate); 
	void SetOverlayStyle(BOOL inUsingCover); 
	void GetOverlayStyle(BOOL * outUsingCover);   
 
	virtual void SetTitle(const char * inTitle, int inLength); 
	void SetTitleColor(BYTE inR, BYTE inG, BYTE inB);  
	void SetTitleStartPosition(POINT inStartPos); 
	void SetTitleFont(LOGFONT inFont); 
	void SetTitleDuration(double inStart, double inEnd); 
 
	// Get the title length by passing NULL to outBuffer 
	int  GetTitle(char * outBuffer); 
	void GetTitleColor(BYTE * outR, BYTE * outG, BYTE * outB); 
	void GetTitleStartPosition(POINT * outStartPos); 
	void GetTitleFont(LOGFONT * outFont); 
	void GetTitleDuration(double * outStart, double * outEnd); 
	 
public: 
	virtual BOOL StartTitleOverlay(void); 
	virtual BOOL StopTitleOverlay(void); 
	BOOL DoTitleOverlay(PBYTE inImage); 
 
protected: 
	void ReleasePixelConverter(void); 
	void ReleaseTitleBuffer(void); 
	void ReleaseTitleDIB(void); 
 
	BOOL CreateTitleDIBBits(void); 
	HBITMAP ActualCreateTitleDIB(HDC inDC); 
	virtual BOOL ValidateTitleDIBSize(void); 
 
	virtual void SideEffectProgressChanged(void); 
	virtual void SideEffectColorSpaceChanged(void); 
	virtual void SideEffectFontChanged(void); 
	 
	// Subclass can use these methods to do more details 
	virtual BOOL BeforeActualOverlay(void); 
	virtual BOOL AfterActualOverlay(void); 
	virtual BOOL ActualOverlay(PBYTE inImage); 
}; 
 
#endif // __H_COverlayController__