查找IFileSourceFilter上的Pin

IGraphBuilder *pigb  = NULL;
IMediaControl *pimc  = NULL;
IMediaEventEx *pimex = NULL;
IVideoWindow  *pivw  = NULL;
IMediaSeeking  *pims  = NULL;

HRESULT AddSourceByFilterCLSID(IGraphBuilder *pGraph,const GUID& clsid,	LPCWSTR wszName,LPCWSTR wszFileName)
{
if  (!pGraph) return E_POINTER;
IBaseFilter *pF = 0;
HRESULT      hr = S_OK;
hr = CoCreateInstance(clsid, 0, CLSCTX_INPROC_SERVER, IID_IBaseFilter, reinterpret_cast<void**>(&pF));
if (SUCCEEDED(hr))
{
hr = pGraph->AddFilter(pF, wszName);
if (SUCCEEDED(hr))
{
IFileSourceFilter *pSF = NULL;
hr = pF->QueryInterface(IID_IFileSourceFilter, (void**)&pSF);
if (SUCCEEDED(hr))
{
pSF->Load(wszFileName, NULL);
pSF->Release();
}
}

if (SUCCEEDED(hr))
{
IEnumPins *pEnum;
IPin      *pPin;
hr = pF->EnumPins(&pEnum);
if (SUCCEEDED(hr))
{
while(pEnum->Next(1, &pPin, 0) == S_OK)
{
PIN_DIRECTION pinDirThis;
pPin->QueryDirection(&pinDirThis);
if (PINDIR_OUTPUT == pinDirThis)
{
hr = pGraph->Render(pPin);
if (FAILED(hr))
{
break;
}
}
pPin->Release();
}
pEnum->Release();
}
}

pF->Release();
}
return hr;
}

HRESULT RenderAVI(LPCTSTR szFilePath,IGraphBuilder * gb)
{
LPCTSTR szExt = _tcsrchr(szFilePath,'.');//过滤avi文件
if(!szExt)
{
return E_FAIL;
}
++szExt;
if(_tcsicmp(szExt,_T("avi"))!=0) return E_INVALIDARG;
USES_CONVERSION;
const GUID CLSID_AviSource={0xCEA8DEFF,0x0AF7,0x4DB9,{0x9A,0x38,0xFB,0x3C,0x3A,0xEF,0xC0,0xDE}};
CComPtr<IBaseFilter> spAviSource;
HRESULT hr = AddSourceByFilterCLSID(gb,CLSID_AviSource,L"SOURCE FILTER",T2W(szFilePath));
if(spAviSource==NULL) return hr;
/*	CComQIPtr<IFileSourceFilter> FileSource(spAviSource);
hr = FileSource->Load(T2W(szFilePath),NULL);
if(FAILED(hr)) return hr;
CComPtr<IEnumPins> ep;
hr = spAviSource->EnumPins(&ep);
if(FAILED(hr)) return hr;
CComPtr<IPin> pin;
DWORD dwCount;
int i = 0;
for(;;)
{
dwCount = 0;
hr = ep->Next(1,&pin,&dwCount);
if(hr!=NOERROR)
{
if(i) hr = NOERROR;
break;
}
hr = gb->Render(pin);
if(hr==NOERROR) ++i;
pin = NULL;
}
return hr;*/
return NOERROR;
}

void CTestFilterDlg::OnButton4()
{
// TODO: Add your control notification handler code here
CoInitialize(NULL);
HRESULT	hr = CoCreateInstance(CLSID_FilterGraph,
NULL,
CLSCTX_INPROC_SERVER,
IID_IGraphBuilder,
(void **)&pigb);
pigb->QueryInterface(IID_IMediaControl, (void **)&pimc);
pigb->QueryInterface(IID_IMediaEventEx, (void **)&pimex);
pigb->QueryInterface(IID_IMediaSeeking, (void **)&pims);
pigb->QueryInterface(IID_IVideoWindow, (void **)&pivw);
// hr = pigb->RenderFile(L"d:\\temp\\bmw.MPG", NULL);//
hr = RenderAVI("F:\\FFOutput\\ff640480.avi",pigb);

if (hr)
{
MessageBox("ERR RENDERAVI!");
}

HWND m_hwndScreen = m_Screen2.GetSafeHwnd();

RECT rc;

hr = pivw->put_Owner((OAHWND)m_hwndScreen);
hr = pivw->put_WindowStyle(WS_CHILD | WS_CLIPCHILDREN);
m_Screen2.GetClientRect(&rc);
hr = pivw->SetWindowPosition(0, 0, (rc.right), (rc.bottom));
hr = pivw->put_Visible(OATRUE);//*/
hr = pimc->Run();
}