完好的DirectShow捕获音视频的demo（源码）

? ? ?? 近段时辰由于工作上的需要，大概看了下DirectShow，写了个小的demo，便当知道。往后在深化的学习下DirectShow。贴出代码。 对音频所做的处置如下图： 1. common.h文件 #ifndef __COMMON_H__
#define __COMMON_H__

#include 
#include "qedit.h"
#include 
#include 
#pragma comment(lib,"Strmiids.lib")

//define release maco
#define ReleaseInterface(x) \
	if ( NULL != x ) \
{ \
	x->Release( ); \
	x = NULL; \
}
// Application-defined message to notify app of filter graph events
#define WM_GRAPHNOTIFY  WM_APP 100

void Msg(HWND hwnd,TCHAR *szFormat, ...);
bool Bstr_Compare(BSTR bstrFilter,BSTR bstrDevice);

#endif// __COMMON_H__ 完结： #include "common.h"

void Msg(HWND hwnd,TCHAR *szFormat, ...)
{
	TCHAR szBuffer[1024];  
	const size_t NUMCHARS = sizeof(szBuffer) / sizeof(szBuffer[0]);
	const int LASTCHAR = NUMCHARS - 1;

	va_list pArgs;
	va_start(pArgs, szFormat);

	(void)StringCchVPrintf(szBuffer, NUMCHARS - 1, szFormat, pArgs);
	va_end(pArgs);

	szBuffer[LASTCHAR] = TEXT('\0');

	MessageBox(hwnd, szBuffer, TEXT("Message"), MB_OK | MB_ICONERROR);
}

bool Bstr_Compare(BSTR bstrFilter,BSTR bstrDevice)
{
	bool flag = true;
	int strlenFilter = SysStringLen(bstrFilter);
	int strlenDevice = SysStringLen(bstrDevice);
	char* chrFilter = (char*)malloc(strlenFilter 1);
	char* chrDevice = (char*)malloc(strlenDevice 1);
	int j = 0;

	if (strlenFilter!=strlenDevice)
		flag = false;
	else
	{
		for(; j < strlenFilter;j  )
		{
			chrFilter[j] = (char)bstrFilter[j];
			chrDevice[j] = (char)bstrDevice[j];

		}
		chrFilter[strlenFilter] = '\0';
		chrDevice[strlenDevice] = '\0';

		for(j=0; j < strlenFilter;j  )
		{
			if(chrFilter[j] != chrDevice[j])
				flag = false;
		}

		if(flag == true