videorendereroverlay.h

VC++视频开发实例集锦(包括“远程视频监控”"语音识别系统"等13个经典例子)

/**************************************************************************************
 *                                                                                    *
 *                                                                                    *
 **************************************************************************************/

#ifndef VIDEORENDERER_OVERLAY_H
#define VIDEORENDERER_OVERLAY_H

/*
 * 基类
 */

#include "MediaClasses.h"
#include "Resizer.h"

/*
 * 包括直接显示
 *
 */

#include <ddraw.h>

/*
 * 叠加目标色度键
 */
//像素深度是用位/像素(bpp)决定
#define DD_OVERLAY_COLORKEY_16BPP      0x00000001 
#define DD_OVERLAY_COLORKEY_32BPP      0x0000000F 
#define DD_OVERLAY_COLORREF            0x000F0000 

#define DD_OVERLAY_COLORKEY_FULLSCREEN 0x00000001 
#define DD_OVERLAY_COLORREF_FULLSCREEN 0x000F0000 


/*
 * 叠加视频补偿器类
 */

class MediaVideoRendererOverlay : public MediaItemVideoRenderer {

private:

	MediaItemSubtitler  *subtitler;
	MediaBuffer         *lastPicture;
	DWORD                invertFlag;

	LPDIRECTDRAW7        lpdd;
	LPDIRECTDRAWSURFACE7 lpddsPrimary;
	LPDIRECTDRAWCLIPPER  lpddClipper;
	LPDIRECTDRAWSURFACE7 lpddsOverlay;

	unsigned int         width;
	unsigned int         height;
	media_video_mode_t   videoMode;

	unsigned int         fullscreenWidth;
	unsigned int         fullscreenHeight;

	DWORD                bpp;
	DWORD                physicalDepth;

	RECT                 fullRects[3];
	HWND                 hwndPlayback;

public:

	MediaVideoRendererOverlay();
	~MediaVideoRendererOverlay();

	/*
	 * 媒体项方法
	 */

	media_type_t  GetType();
	char         *GetName();

	MP_RESULT     Connect(MediaItem *item);
	MP_RESULT     ReleaseConnections();

	DWORD         GetCaps();
	MP_RESULT     Configure(HINSTANCE hInstance, HWND hwnd);

	/*
	 * 专用的叠加探测方法
	 *
	 */

	BOOL      AreOverlaysSupported();

	/*
	 * 视频补偿方法
	 */

	MP_RESULT Init(HWND hwnd, unsigned int width, unsigned int height);
	MP_RESULT InitFullscreen(HWND hwnd, unsigned int width, unsigned int height);

	media_video_mode_t GetVideoMode();
	MP_RESULT          Stop();
	RECT              *GetFullscreenRects(); 

	MP_RESULT Draw(MediaBuffer *buffer, RECT *rect, int frameNumber, int invertFlag);
	MP_RESULT DrawFullscreen(MediaBuffer *buffer, int frameNumber, int invertFlag, int desktopMode);

	MP_RESULT Close();
};

#endif