扫一扫
分享文章到微信
扫一扫
关注官方公众号
至顶头条
作者:sunjin007 来源:论坛 2007年11月16日
关键字:
void CPlayWndDlg::OnBnClickedBrowseButton() { CFileDialog dlgFile(TRUE, NULL, NULL, OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT, "Movie Files (*.avi;*.mpg;*.mpeg) |\ *.avi;*.mpg;*.mpeg |\ Audio Files (*.wav;*mp3;*.mpa;*.mpu;*.au) |\ *.wav;*.mp3;*.mpa;*.mpu;*.au |\ Midi Files (*.mid;*.midi;*.rmi) |\ *.mid;*.midi;*.rmi| | ", this); if(dlgFile.DoModal() == IDOK) { m_strMediaFile = dlgFile.GetPathName(); GetDlgItem(IDC_MEDIAFILE_EDIT)->SetWindowText(m_strMediaFile); } else return; CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC, IID_IGraphBuilder, (void **)&m_pGraph); HRESULT hr = m_pGraph->RenderFile(CA2W(m_strMediaFile), NULL); if(FAILED(hr)) { char szMsg[200]; AMGetErrorText(hr, szMsg, sizeof(szMsg)); AfxMessageBox(szMsg); } //指定父窗体 IVideoWindow* pVidWin = NULL; m_pGraph->QueryInterface(IID_IVideoWindow, (void **)&pVidWin); pVidWin->put_Owner((OAHWND)m_hWnd); pVidWin->put_WindowStyle(WS_CHILD | WS_CLIPSIBLINGS | WS_CLIPCHILDREN); CRect rc; GetDlgItem(IDC_VW_FRAME)->GetWindowRect(rc); ScreenToClient(rc); pVidWin->SetWindowPosition(rc.left, rc.top, rc.Width(), rc.Height()); // 注意此处Filter Graph Manager的事件以WM_GRAPHNOTIFY发出(用户定义的消息). m_pGraph->QueryInterface(IID_IMediaEventEx, (void **)&m_pEvent); m_pEvent->SetNotifyWindow((OAHWND)m_hWnd, WM_GRAPHNOTIFY, 0); // 设置Seeking m_pGraph->QueryInterface(IID_IMediaSeeking, (void **)&m_pMediaSeeking); } void CPlayWndDlg::OnBnClickedPlayButton() { Play(); } void CPlayWndDlg::OnBnClickedPauseButton() { m_pMediaControl->Pause(); m_isPlaying = TRUE; GetDlgItem(IDC_PLAY_BUTTON)->EnableWindow(TRUE); GetDlgItem(IDC_PAUSE_BUTTON)->EnableWindow(FALSE); } void CPlayWndDlg::OnBnClickedCancel() { // TODO: 在此添加控件通知处理程序代码 CleanUp(); OnCancel(); } |
#define WM_GRAPHNOTIFY WM_USER + 101 |
// 实现 protected: HICON m_hIcon; // 生成的消息映射函数 virtual BOOL OnInitDialog(); afx_msg void OnSysCommand(UINT nID, LPARAM lParam); afx_msg void OnPaint(); afx_msg HCURSOR OnQueryDragIcon(); DECLARE_MESSAGE_MAP() afx_msg HRESULT OnGraphNotify(WPARAM wParam,LPARAM lParam); private: IGraphBuilder *m_pGraph; IMediaControl *m_pMediaControl; IMediaEventEx *m_pEvent; |
ON_BN_CLICKED(IDC_BROWSE_BUTTON, OnBnClickedBrowseButton) ON_BN_CLICKED(IDC_PLAY_BUTTON, OnBnClickedPlayButton) ON_BN_CLICKED(IDC_PAUSE_BUTTON, OnBnClickedPauseButton) ON_BN_CLICKED(IDCANCEL, OnBnClickedCancel) ON_MESSAGE(WM_GRAPHNOTIFY, OnGraphNotify) END_MESSAGE_MAP() |
HRESULT CPlayWndDlg::OnGraphNotify(WPARAM wParam,LPARAM lParam) { long levCode, lparam1, lparam2; HRESULT hr; while (hr = m_pEvent->GetEvent(&levCode, &lparam1, &lparam2, 0), SUCCEEDED(hr)) { hr = m_pEvent->FreeEventParams(levCode, lparam1, lparam2); if ((EC_COMPLETE == levCode) || (EC_USERABORT == levCode)) { TRACE("End of the media file!!.\n"); Stop(); //CleanUp(); break; } } return hr; } |
如果您非常迫切的想了解IT领域最新产品与技术信息,那么订阅至顶网技术邮件将是您的最佳途径之一。