kainster

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在CStatic上显示视频

Posted on 2008-09-26 15:33 kainster 阅读(429) 评论(0)  编辑  收藏
把视频显示在CStatic上,上一篇讲了怎么播放一个视频,但是如果要嵌在对话框之类的窗体上面的话,就需要用IVideoWindow接口,通过pWindow->put_Owner((OAHWND)m_Screen.GetSafeHwnd());就可以指定pWindow是显示在m_Screen控件上面了
    IGraphBuilder *pGraph;
    IMediaControl 
*pControl;
    IMediaEventEx   
*pEvent;
    IVideoWindow  
*pWindow;
HRESULT hr 
= CoInitialize(NULL);
    
if (FAILED(hr))
    
{
        
// Add error-handling code here. (Omitted for clarity.)
    }

    CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC, 
                         IID_IGraphBuilder, (
void **)&pGraph);
    pGraph
->QueryInterface(IID_IMediaControl,  (void **)&pControl);
    pGraph
->QueryInterface(IID_IVideoWindow,   (void **)&pWindow);
    pGraph
->QueryInterface(IID_IMediaEventEx, (void **)&pEvent);
    pEvent
->SetNotifyWindow((OAHWND)m_Screen.GetParent()->m_hWnd, WM_GRAPHNOTIFY, 0);
    hr 
= pGraph->RenderFile(L"D:\\yf.avi", NULL);
    m_Screen.ModifyStyle(
0, WS_CLIPCHILDREN);
    
if(pWindow)
    
{
        
//pWindow->put_MessageDrain((OAHWND) m_Screen.GetParent()->m_hWnd);
        pWindow->put_Owner((OAHWND)m_Screen.GetSafeHwnd());
        hr 
= pWindow->put_WindowStyle(WS_CHILD);
        

        CRect rc;
        
        m_Screen.GetClientRect(
&rc);
        
int width = rc.right - rc.left;
        
int height = rc.bottom - rc.top;
        pWindow
->SetWindowPosition(rc.left,rc.top,width,height);
        hr 
= pWindow->put_Visible(OATRUE);
        hr 
= pWindow->SetWindowForeground(-1);
    }

    pControl
->Run();

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