减少捕获音视频时申请内存次数

减少音频视频捕获过程中频繁申请内存。

client/CaptureVideo.h

@@ -36,7 +36,7 @@ public:
 	LPBITMAPINFO m_BitmapInfor_Full;
 	BYTE*        m_BitmapData_Full;
 	BOOL         bStact; 
-	DWORD        m_dwSize;
+	DWORD        m_dwSize; // <20><>Ƶͼ<C6B5><CDBC><EFBFBD><EFBFBD><EFBFBD>ݴ<EFBFBD>С
 
 	CSampleGrabberCB()
 	{
@@ -152,6 +152,7 @@ public:
 	}
 };
 
+extern CSampleGrabberCB mCB;
 
 class CCaptureVideo  
 {
@@ -165,6 +166,10 @@ public:
 
 	LPBYTE GetDIB(DWORD& dwSize);
 
+	int GetDIBBufSize() const { return mCB.m_dwSize; }
+
+	BOOL		m_bExit;
+
 	HWND      m_hWnd;
 
 	IGraphBuilder *    m_pGB;   //ͨ<><CDA8><EFBFBD><EFBFBD>ֵ<EFBFBD><D6B5><EFBFBD>Է<EFBFBD><D4B7><EFBFBD> FCDO   Filter Control Device Object