学步园

#include <DShow.h><br /> #include <InitGuid.h><br /> #pragma comment(lib,"strmiids.lib")<br /> #pragma comment(lib,"quartz.lib")</p> <p>DEFINE_GUID(CLSID_RealSource,0x61a33c2a, 0x42dd, 0x4b40, 0x83, 0x8f, 0xe2, 0xf3, 0x5a, 0xc9, 0x96, 0x6a); // {61A33C2A-42DD-4b40-838F-E2F35AC9966A}<br /> DEFINE_GUID(CLSID_RealVideoDecoder,0x97e3783, 0x8f17, 0x43b3, 0x8d, 0x77, 0x9a, 0x37, 0x34, 0x53, 0x98, 0x10); // {097E3783-8F17-43b3-8D77-9A3734539810}<br /> DEFINE_GUID(CLSID_RealAudioDecoder,0xe5241d26, 0x8677, 0x40c5, 0xaa, 0x5d, 0xa1, 0x1a, 0x66, 0xe5, 0x22, 0xe6); // {E5241D26-8677-40c5-AA5D-A11A66E522E6}</p> <p>BOOL IsCanConnectPin(IPin *pPin,PIN_DIRECTION dir)<br /> {<br /> PIN_INFO pi;<br /> if(FAILED(pPin->QueryPinInfo(&pi)))<br /> return FALSE;<br /> else if(pi.pFilter)<br /> pi.pFilter->Release();</p> <p> if(pi.dir != dir)<br /> return FALSE;</p> <p> CComPtr<IPin> pPinTo;<br /> return !SUCCEEDED(pPin->ConnectedTo(&pPinTo));<br /> }</p> <p>HRESULT ConnectFilter(IBaseFilter* pFilterOut,IBaseFilter* pFilterIn)<br /> {<br /> HRESULT hr = E_FAIL;<br /> if(!pFilterIn || !pFilterOut)<br /> return E_POINTER;</p> <p> FILTER_INFO fi;<br /> if(SUCCEEDED(pFilterOut->QueryFilterInfo(&fi)))<br /> {<br /> if(fi.pGraph)<br /> {<br /> fi.pGraph->Release();</p> <p> CComPtr<IEnumPins>pEnumPins;<br /> if(SUCCEEDED(pFilterOut->EnumPins(&pEnumPins)))<br /> {<br /> ULONG cFetched;<br /> CComPtr<IPin> pPinOut;<br /> for(int _index = 0; S_OK == pEnumPins->Next(1,&pPinOut,&cFetched); _index++,pPinOut = NULL)<br /> {<br /> if(!IsCanConnectPin(pPinOut,PINDIR_OUTPUT))<br /> continue;</p> <p> CComPtr<IEnumPins>pEnumPins;<br /> if(SUCCEEDED(pFilterIn->EnumPins(&pEnumPins)))<br /> {<br /> ULONG cFetched;<br /> CComPtr<IPin> pPinIn;<br /> for(int _index = 0; S_OK == pEnumPins->Next(1,&pPinIn,&cFetched);_index++,pPinIn = NULL)<br /> {<br /> if(IsCanConnectPin(pPinIn,PINDIR_INPUT))<br /> {<br /> try<br /> {<br /> hr = fi.pGraph->ConnectDirect(pPinOut,pPinIn,0);<br /> }<br /> catch(...)<br /> {<br /> hr = E_FAIL;<br /> }<br /> if(SUCCEEDED(hr))<br /> return S_OK;<br /> }<br /> }<br /> }<br /> }<br /> }<br /> }<br /> }</p> <p> return E_FAIL;<br /> }</p> <p>HRESULT AddToRot(IUnknown *pUnkGraph,DWORD *pdwResgister)<br /> {<br /> IMoniker *pMoniker = NULL;<br /> IRunningObjectTable *pROT = NULL;<br /> if(FAILED(GetRunningObjectTable(0,&pROT)))<br /> return E_FAIL;</p> <p> WCHAR wsz[MAX_PATH] = {0};<br /> wsprintfW(wsz,L"FilterGraph %08x pid %08x",(DWORD_PTR)pUnkGraph,GetCurrentProcessId());<br /> HRESULT hr = CreateItemMoniker(L"!",wsz,&pMoniker);<br /> if(SUCCEEDED(hr))<br /> {<br /> hr = pROT->Register(ROTFLAGS_REGISTRATIONKEEPSALIVE,pUnkGraph,pMoniker,pdwResgister);<br /> }<br /> pROT->Release();<br /> return hr;<br /> }</p> <p>void CDShowDlg::OnBnClickedPlay()<br /> {<br /> if(m_strFileName.IsEmpty())<br /> {<br /> MessageBox(L"请选择一个文件",L"提示");<br /> return;<br /> }</p> <p> CoInitialize(NULL);</p> <p> CComPtr<IGraphBuilder>m_spGB;<br /> m_spGB.CoCreateInstance(CLSID_FilterGraph,0,CLSCTX_INPROC_SERVER);</p> <p> if(m_spGB)<br /> {<br /> DWORD dwRegister;<br /> AddToRot(m_spGB,&dwRegister);</p> <p> CComPtr<IBaseFilter>spSource;<br /> spSource.CoCreateInstance(CLSID_RealSource,0,CLSCTX_INPROC_SERVER);</p> <p> CComPtr<IBaseFilter>spVideoDecoder;<br /> spVideoDecoder.CoCreateInstance(CLSID_RealVideoDecoder,0,CLSCTX_INPROC_SERVER);</p> <p> CComPtr<IBaseFilter>spAudioDecoder;<br /> spAudioDecoder.CoCreateInstance(CLSID_RealAudioDecoder,0,CLSCTX_INPROC_SERVER);</p> <p> CComPtr<IBaseFilter>spVideoRender;<br /> spVideoRender.CoCreateInstance(CLSID_VideoMixingRenderer,0,CLSCTX_INPROC_SERVER);</p> <p> CComPtr<IBaseFilter>spAudioRender;<br /> spAudioRender.CoCreateInstance(CLSID_DSoundRender,0,CLSCTX_INPROC_SERVER);</p> <p> if(spSource && spAudioDecoder && spVideoDecoder && spAudioRender && spVideoRender)<br /> {<br /> m_spGB->AddFilter(spSource,L"Source");<br /> m_spGB->AddFilter(spVideoDecoder,L"VideoDecoder");<br /> m_spGB->AddFilter(spAudioDecoder,L"AudioDecoder");<br /> m_spGB->AddFilter(spVideoRender,L"VideoRender");<br /> m_spGB->AddFilter(spAudioRender,L"AudioRender");</p> <p> CComQIPtr<IFileSourceFilter>spFileSource(spSource);<br /> if(spFileSource)<br /> {<br /> if(S_OK == spFileSource->Load(m_strFileName,0))<br /> {<br /> ConnectFilter(spSource,spVideoDecoder);<br /> ConnectFilter(spSource,spAudioDecoder);<br /> ConnectFilter(spVideoDecoder,spVideoRender);<br /> ConnectFilter(spAudioDecoder,spAudioRender);<br /> }<br /> }</p> <p> {<br /> CComQIPtr<IVideoWindow>spVideoWnd(m_spGB);<br /> if(spVideoWnd)<br /> {<br /> spVideoWnd->put_Owner((OAHWND)this->GetSafeHwnd());<br /> spVideoWnd->put_WindowStyle(WS_CHILD|WS_CLIPSIBLINGS|WS_CLIPCHILDREN|WS_VISIBLE);<br /> spVideoWnd->put_WindowStyleEx(WS_EX_NOPARENTNOTIFY);<br /> CRect rt;<br /> GetClientRect(&rt);<br /> spVideoWnd->SetWindowPosition(0,0,rt.Width(),rt.Height());<br /> }</p> <p> CComQIPtr<IMediaControl>spControl(m_spGB);<br /> if(spControl)<br /> spControl->Run();<br /> }<br /> }<br /> }</p> <p> CoUninitialize;<br /> }</p> <p>void CDShowDlg::OnBnClickedBrowser()<br /> {<br /> CFileDialog dlg(TRUE,NULL,NULL,0,L"All File(*.*)|*.*");<br /> if(IDOK == dlg.DoModal())<br /> {<br /> CString strFileName = dlg.GetPathName();<br /> SetDlgItemText(IDC_FILENAME,strFileName);<br /> m_strFileName = strFileName;<br /> }<br /> }<br />