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Media Player Classic - HC 源代码分析 4：核心类 （CMainFrame）（3）_cmainframe::onwjdy()

作者：weixin_40725706 | 2024-03-27 20:47:45

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cmainframe::onwjdy()

=====================================================

Media Player Classic - HC 源代码分析系列文章列表：

Media Player Classic - HC 源代码分析 1：整体结构

Media Player Classic - HC 源代码分析 2：核心类 （CMainFrame）（1）

Media Player Classic - HC 源代码分析 3：核心类 （CMainFrame）（2）

Media Player Classic - HC 源代码分析 4：核心类 （CMainFrame）（3）

Media Player Classic - HC 源代码分析 5：关于对话框 （CAboutDlg）

Media Player Classic - HC 源代码分析 6：MediaInfo选项卡 （CPPageFileMediaInfo）

Media Player Classic - HC 源代码分析 7：详细信息选项卡（CPPageFileInfoDetails）

=====================================================



此前已经写了2篇文章介绍Media Player Classic - HC （mpc-hc）源代码中的核心类 CMainFrame：

Media Player Classic - HC 源代码分析 2：核心类 （CMainFrame）（1）

Media Player Classic - HC 源代码分析 3：核心类 （CMainFrame）（2）

此前的文章一直都是围绕着OpenMedia()以及其调用的函数进行分析的。研究的都是和文件打开有关系的功能。在这里再介绍一些其它函数。

在mpc-hc开始运行的时候，会调用OnCreate()：

  1. <span style="font-family:Arial;font-size:12px;">//刚打开的时候加载
  2. int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
  3. {
  4.     if (__super::OnCreate(lpCreateStruct) == -1) {
  5.         return -1;
  6.     }
  7. 	//加载菜单
  8.     m_popup.LoadMenu(IDR_POPUP);
  9.     m_popupmain.LoadMenu(IDR_POPUPMAIN);
  10.  
  11.     // create a view to occupy the client area of the frame
  12. 	// 创建视频画面部分？
  13.     if (!m_wndView.Create(nullptr, nullptr, AFX_WS_DEFAULT_VIEW,
  14.                           CRect(0, 0, 0, 0), this, AFX_IDW_PANE_FIRST, nullptr)) {
  15.         TRACE(_T("Failed to create view window\n"));
  16.         return -1;
  17.     }
  18.     // Should never be RTLed
  19.     m_wndView.ModifyStyleEx(WS_EX_LAYOUTRTL, WS_EX_NOINHERITLAYOUT);
  20.  
  21.     // static bars
  22. 	//各种状态栏
  23.     BOOL bResult = m_wndStatusBar.Create(this);
  24.     if (bResult) {
  25.         bResult = m_wndStatsBar.Create(this);
  26.     }
  27.     if (bResult) {
  28.         bResult = m_wndInfoBar.Create(this);
  29.     }
  30.     if (bResult) {
  31.         bResult = m_wndToolBar.Create(this);
  32.     }
  33.     if (bResult) {
  34.         bResult = m_wndSeekBar.Create(this);
  35.     }
  36.     if (!bResult) {
  37.         TRACE(_T("Failed to create all control bars\n"));
  38.         return -1;      // fail to create
  39.     }
  40. 	// 各种Bar
  41.     m_pFullscreenWnd = DEBUG_NEW CFullscreenWnd(this);
  42.  
  43.     m_bars.AddTail(&m_wndSeekBar);
  44.     m_bars.AddTail(&m_wndToolBar);
  45.     m_bars.AddTail(&m_wndInfoBar);
  46.     m_bars.AddTail(&m_wndStatsBar);
  47.     m_bars.AddTail(&m_wndStatusBar);
  48.  
  49.     m_wndSeekBar.Enable(false);
  50.  
  51.     // dockable bars
  52. 	// 可停靠的
  53.     EnableDocking(CBRS_ALIGN_ANY);
  54.  
  55.     m_dockingbars.RemoveAll();
  56.  
  57.     m_wndSubresyncBar.Create(this, AFX_IDW_DOCKBAR_TOP, &m_csSubLock);
  58.     m_wndSubresyncBar.SetBarStyle(m_wndSubresyncBar.GetBarStyle() | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC);
  59.     m_wndSubresyncBar.EnableDocking(CBRS_ALIGN_ANY);
  60.     m_wndSubresyncBar.SetHeight(200);
  61.     m_dockingbars.AddTail(&m_wndSubresyncBar);
  62.  
  63.     m_wndPlaylistBar.Create(this, AFX_IDW_DOCKBAR_BOTTOM);
  64.     m_wndPlaylistBar.SetBarStyle(m_wndPlaylistBar.GetBarStyle() | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC);
  65.     m_wndPlaylistBar.EnableDocking(CBRS_ALIGN_ANY);
  66.     m_wndPlaylistBar.SetHeight(100);
  67.     m_dockingbars.AddTail(&m_wndPlaylistBar);
  68.     m_wndPlaylistBar.LoadPlaylist(GetRecentFile());
  69.  
  70.     m_wndEditListEditor.Create(this, AFX_IDW_DOCKBAR_RIGHT);
  71.     m_wndEditListEditor.SetBarStyle(m_wndEditListEditor.GetBarStyle() | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC);
  72.     m_wndEditListEditor.EnableDocking(CBRS_ALIGN_ANY);
  73.     m_dockingbars.AddTail(&m_wndEditListEditor);
  74.     m_wndEditListEditor.SetHeight(100);
  75.  
  76.     m_wndCaptureBar.Create(this, AFX_IDW_DOCKBAR_LEFT);
  77.     m_wndCaptureBar.SetBarStyle(m_wndCaptureBar.GetBarStyle() | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC);
  78.     m_wndCaptureBar.EnableDocking(CBRS_ALIGN_LEFT | CBRS_ALIGN_RIGHT);
  79.     m_dockingbars.AddTail(&m_wndCaptureBar);
  80.  
  81.     m_wndNavigationBar.Create(this, AFX_IDW_DOCKBAR_LEFT);
  82.     m_wndNavigationBar.SetBarStyle(m_wndNavigationBar.GetBarStyle() | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC);
  83.     m_wndNavigationBar.EnableDocking(CBRS_ALIGN_LEFT | CBRS_ALIGN_RIGHT);
  84.     m_dockingbars.AddTail(&m_wndNavigationBar);
  85.  
  86.     m_wndShaderEditorBar.Create(this, AFX_IDW_DOCKBAR_TOP);
  87.     m_wndShaderEditorBar.SetBarStyle(m_wndShaderEditorBar.GetBarStyle() | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC);
  88.     m_wndShaderEditorBar.EnableDocking(CBRS_ALIGN_ANY);
  89.     m_dockingbars.AddTail(&m_wndShaderEditorBar);
  90.  
  91.     // Hide all dockable bars by default
  92.     POSITION pos = m_dockingbars.GetHeadPosition();
  93.     while (pos) {
  94.         m_dockingbars.GetNext(pos)->ShowWindow(SW_HIDE);
  95.     }
  96.  
  97.     m_fileDropTarget.Register(this);
  98.  
  99.     const CAppSettings& s = AfxGetAppSettings();
  100.  
  101.     // Load the controls
  102.     m_nCS = s.nCS;
  103.     ShowControls(m_nCS);
  104. 	//是否在最前？
  105.     SetAlwaysOnTop(s.iOnTop);
  106. 	//显示系统托盘图标
  107.     ShowTrayIcon(s.fTrayIcon);
  108. 	//焦点
  109.     SetFocus();
  110. 	//创建CGraphThread类的线程
  111.     m_pGraphThread = (CGraphThread*)AfxBeginThread(RUNTIME_CLASS(CGraphThread));
  112. 	//设置。。
  113.     if (m_pGraphThread) {
  114.         m_pGraphThread->SetMainFrame(this);
  115.     }
  116.  
  117.     if (s.nCmdlnWebServerPort != 0) {
  118.         if (s.nCmdlnWebServerPort > 0) {
  119.             StartWebServer(s.nCmdlnWebServerPort);
  120.         } else if (s.fEnableWebServer) {
  121.             StartWebServer(s.nWebServerPort);
  122.         }
  123.     }
  124.  
  125.     // Casimir666 : reload Shaders
  126.     {
  127.         CString strList = s.strShaderList;
  128.         CString strRes;
  129.         int curPos = 0;
  130.  
  131.         strRes = strList.Tokenize(_T("|"), curPos);
  132.         while (!strRes.IsEmpty()) {
  133.             m_shaderlabels.AddTail(strRes);
  134.             strRes = strList.Tokenize(_T("|"), curPos);
  135.         }
  136.     }
  137.     {
  138.         CString strList = s.strShaderListScreenSpace;
  139.         CString strRes;
  140.         int curPos = 0;
  141.  
  142.         strRes = strList.Tokenize(_T("|"), curPos);
  143.         while (!strRes.IsEmpty()) {
  144.             m_shaderlabelsScreenSpace.AddTail(strRes);
  145.             strRes = strList.Tokenize(_T("|"), curPos);
  146.         }
  147.     }
  148.  
  149.     m_bToggleShader = s.fToggleShader;
  150.     m_bToggleShaderScreenSpace = s.fToggleShaderScreenSpace;
  151. 	//标题
  152.     m_strTitle.LoadString(IDR_MAINFRAME);
  153.  
  154. #ifdef MPCHC_LITE
  155.     m_strTitle += _T(" Lite");
  156. #endif
  157. 	//设置窗口标题
  158.     SetWindowText(m_strTitle);
  159.     m_Lcd.SetMediaTitle(LPCTSTR(m_strTitle));
  160.  
  161.     WTSRegisterSessionNotification();
  162.  
  163.     if (s.bNotifySkype) {
  164.         m_pSkypeMoodMsgHandler.Attach(DEBUG_NEW SkypeMoodMsgHandler());
  165.         m_pSkypeMoodMsgHandler->Connect(m_hWnd);
  166.     }
  167.  
  168.     return 0;
  169. }</span>

在mpc-hc关闭的时候，会调用OnDestroy()：
 

  1. <span style="font-family:Arial;font-size:12px;">//关闭的时候加载
  2. void CMainFrame::OnDestroy()
  3. {
  4.     WTSUnRegisterSessionNotification();
  5. 	//关闭系统托盘图标
  6.     ShowTrayIcon(false);
  7.     m_fileDropTarget.Revoke();
  8. 	//线程还在运行的话
  9.     if (m_pGraphThread) {
  10.         CAMMsgEvent e;
  11. 		//退出
  12.         m_pGraphThread->PostThreadMessage(CGraphThread::TM_EXIT, 0, (LPARAM)&e);
  13.         if (!e.Wait(5000)) {
  14.             TRACE(_T("ERROR: Must call TerminateThread() on CMainFrame::m_pGraphThread->m_hThread\n"));
  15.             TerminateThread(m_pGraphThread->m_hThread, (DWORD) - 1);
  16.         }
  17.     }
  18.  
  19.     if (m_pFullscreenWnd) {
  20.         if (m_pFullscreenWnd->IsWindow()) {
  21.             m_pFullscreenWnd->DestroyWindow();
  22.         }
  23.         delete m_pFullscreenWnd;
  24.     }
  25.  
  26.     __super::OnDestroy();
  27. }</span>

在关闭一个媒体的时候，会调用OnClose()：

  1. //关闭的时候加载
  2. void CMainFrame::OnClose()
  3. {
  4. 	//获取设置
  5.     CAppSettings& s = AfxGetAppSettings();
  6.     // Casimir666 : save shaders list
  7.     {
  8.         POSITION pos;
  9.         CString strList = "";
  10.  
  11.         pos = m_shaderlabels.GetHeadPosition();
  12.         while (pos) {
  13.             strList += m_shaderlabels.GetAt(pos) + "|";
  14.             m_dockingbars.GetNext(pos);
  15.         }
  16.         s.strShaderList = strList;
  17.     }
  18.     {
  19.         POSITION pos;
  20.         CString  strList = "";
  21.  
  22.         pos = m_shaderlabelsScreenSpace.GetHeadPosition();
  23.         while (pos) {
  24.             strList += m_shaderlabelsScreenSpace.GetAt(pos) + "|";
  25.             m_dockingbars.GetNext(pos);
  26.         }
  27.         s.strShaderListScreenSpace = strList;
  28.     }
  29.  
  30.     s.fToggleShader = m_bToggleShader;
  31.     s.fToggleShaderScreenSpace = m_bToggleShaderScreenSpace;
  32.  
  33.     s.dZoomX = m_ZoomX;
  34.     s.dZoomY = m_ZoomY;
  35. 	//存储播放列表
  36.     m_wndPlaylistBar.SavePlaylist();
  37. 	//存储控制条
  38.     SaveControlBars();
  39.  
  40.     ShowWindow(SW_HIDE);
  41. 	//关闭媒体（非private）
  42.     CloseMedia();
  43.  
  44.     s.WinLircClient.DisConnect();
  45.     s.UIceClient.DisConnect();
  46.  
  47.     SendAPICommand(CMD_DISCONNECT, L"\0");  // according to CMD_NOTIFYENDOFSTREAM (ctrl+f it here), you're not supposed to send NULL here
  48.     //调用父类onclose
  49. 	__super::OnClose();
  50. }

同时还有一个定时器函数OnTimer()。根据不同的nIDEvent做不同的处理操作。 

  1. //定时刷新的操作
  2. void CMainFrame::OnTimer(UINT_PTR nIDEvent)
  3. {
  4.     switch (nIDEvent) {
  5. 		//当前播放到的位置
  6.         case TIMER_STREAMPOSPOLLER:
  7.             if (m_iMediaLoadState == MLS_LOADED) {
  8.                 REFERENCE_TIME rtNow = 0, rtDur = 0;
  9. 				//播放方式是文件的时候（还可以是DVD或者摄像头）
  10.                 if (GetPlaybackMode() == PM_FILE) {
  11. 					//当前位置
  12.                     m_pMS->GetCurrentPosition(&rtNow);
  13. 					//时常
  14.                     m_pMS->GetDuration(&rtDur);
  15.  
  16.                     // Casimir666 : autosave subtitle sync after play
  17.                     if ((m_nCurSubtitle >= 0) && (m_rtCurSubPos != rtNow)) {
  18.                         if (m_lSubtitleShift != 0) {
  19.                             if (m_wndSubresyncBar.SaveToDisk()) {
  20.                                 m_OSD.DisplayMessage(OSD_TOPLEFT, ResStr(IDS_AG_SUBTITLES_SAVED), 500);
  21.                             } else {
  22.                                 m_OSD.DisplayMessage(OSD_TOPLEFT, ResStr(IDS_MAINFRM_4));
  23.                             }
  24.                         }
  25.                         m_nCurSubtitle   = -1;
  26.                         m_lSubtitleShift = 0;
  27.                     }
  28.  
  29.                     if (!m_fEndOfStream) {
  30.                         CAppSettings& s = AfxGetAppSettings();
  31.  
  32.                         if (m_bRememberFilePos) {
  33.                             FILE_POSITION* filePosition = s.filePositions.GetLatestEntry();
  34.  
  35.                             if (filePosition) {
  36.                                 filePosition->llPosition = rtNow;
  37.  
  38.                                 LARGE_INTEGER time;
  39.                                 QueryPerformanceCounter(&time);
  40.                                 LARGE_INTEGER freq;
  41.                                 QueryPerformanceFrequency(&freq);
  42.                                 if ((time.QuadPart - m_liLastSaveTime.QuadPart) >= 30 * freq.QuadPart) { // save every half of minute
  43.                                     m_liLastSaveTime = time;
  44.                                     s.filePositions.SaveLatestEntry();
  45.                                 }
  46.                             }
  47.                         }
  48.                     }
  49.  
  50.                     if (m_rtDurationOverride >= 0) {
  51.                         rtDur = m_rtDurationOverride;
  52.                     }
  53. 					//设置滑动条控件的参数（位置等。。。）
  54.                     g_bNoDuration = rtDur <= 0;
  55.                     m_wndSeekBar.Enable(rtDur > 0);
  56.                     m_wndSeekBar.SetRange(0, rtDur);
  57.                     m_wndSeekBar.SetPos(rtNow);
  58.                     m_OSD.SetRange(0, rtDur);
  59.                     m_OSD.SetPos(rtNow);
  60.                     m_Lcd.SetMediaRange(0, rtDur);
  61.                     m_Lcd.SetMediaPos(rtNow);
  62.                 } else if (GetPlaybackMode() == PM_CAPTURE) {
  63. 					//如果是摄像头的话，就没有时长信息了
  64.                     m_pMS->GetCurrentPosition(&rtNow);
  65.                     if (m_fCapturing && m_wndCaptureBar.m_capdlg.m_pMux) {
  66.                         CComQIPtr<IMediaSeeking> pMuxMS = m_wndCaptureBar.m_capdlg.m_pMux;
  67.                         if (!pMuxMS || FAILED(pMuxMS->GetCurrentPosition(&rtNow))) {
  68.                             rtNow = 0;
  69.                         }
  70.                     }
  71.  
  72.                     if (m_rtDurationOverride >= 0) {
  73.                         rtDur = m_rtDurationOverride;
  74.                     }
  75.  
  76.                     g_bNoDuration = rtDur <= 0;
  77.                     m_wndSeekBar.Enable(false);
  78.                     m_wndSeekBar.SetRange(0, rtDur);
  79.                     m_wndSeekBar.SetPos(rtNow);
  80.                     m_OSD.SetRange(0, rtDur);
  81.                     m_OSD.SetPos(rtNow);
  82.                     m_Lcd.SetMediaRange(0, rtDur);
  83.                     m_Lcd.SetMediaPos(rtNow);
  84.                 }
  85.  
  86.                 if (m_pCAP && GetPlaybackMode() != PM_FILE) {
  87.                     g_bExternalSubtitleTime = true;
  88.                     if (m_pDVDI) {
  89.                         DVD_PLAYBACK_LOCATION2 Location;
  90.                         if (m_pDVDI->GetCurrentLocation(&Location) == S_OK) {
  91.                             double fps = Location.TimeCodeFlags == DVD_TC_FLAG_25fps ? 25.0
  92.                                          : Location.TimeCodeFlags == DVD_TC_FLAG_30fps ? 30.0
  93.                                          : Location.TimeCodeFlags == DVD_TC_FLAG_DropFrame ? 29.97
  94.                                          : 25.0;
  95.  
  96.                             REFERENCE_TIME rtTimeCode = HMSF2RT(Location.TimeCode, fps);
  97.                             m_pCAP->SetTime(rtTimeCode);
  98.                         } else {
  99.                             m_pCAP->SetTime(/*rtNow*/m_wndSeekBar.GetPos());
  100.                         }
  101.                     } else {
  102.                         // Set rtNow to support DVB subtitle
  103.                         m_pCAP->SetTime(rtNow);
  104.                     }
  105.                 } else {
  106.                     g_bExternalSubtitleTime = false;
  107.                 }
  108.             }
  109.             break;
  110.         case TIMER_STREAMPOSPOLLER2:
  111.             if (m_iMediaLoadState == MLS_LOADED) {
  112.                 __int64 start, stop, pos;
  113.                 m_wndSeekBar.GetRange(start, stop);
  114.                 pos = m_wndSeekBar.GetPosReal();
  115.  
  116.                 GUID tf;
  117.                 m_pMS->GetTimeFormat(&tf);
  118.  
  119.                 if (GetPlaybackMode() == PM_CAPTURE && !m_fCapturing) {
  120.                     CString str = ResStr(IDS_CAPTURE_LIVE);
  121.  
  122.                     long lChannel = 0, lVivSub = 0, lAudSub = 0;
  123.                     if (m_pAMTuner
  124.                             && m_wndCaptureBar.m_capdlg.IsTunerActive()
  125.                             && SUCCEEDED(m_pAMTuner->get_Channel(&lChannel, &lVivSub, &lAudSub))) {
  126.                         CString ch;
  127.                         ch.Format(_T(" (ch%d)"), lChannel);
  128.                         str += ch;
  129.                     }
  130.  
  131.                     m_wndStatusBar.SetStatusTimer(str);
  132.                 } else {
  133.                     m_wndStatusBar.SetStatusTimer(pos, stop, !!m_wndSubresyncBar.IsWindowVisible(), &tf);
  134.                     if (m_bRemainingTime) {
  135.                         m_OSD.DisplayMessage(OSD_TOPLEFT, m_wndStatusBar.GetStatusTimer());
  136.                     }
  137.                 }
  138.  
  139.                 m_wndSubresyncBar.SetTime(pos);
  140.  
  141.                 if (m_pCAP && GetMediaState() == State_Paused) {
  142.                     m_pCAP->Paint(false);
  143.                 }
  144.             }
  145.             break;
  146.         case TIMER_FULLSCREENCONTROLBARHIDER: {
  147.             CPoint p;
  148.             GetCursorPos(&p);
  149.  
  150.             CRect r;
  151.             GetWindowRect(r);
  152.             bool fCursorOutside = !r.PtInRect(p);
  153.  
  154.             CWnd* pWnd = WindowFromPoint(p);
  155.             if (pWnd && (m_wndView == *pWnd || m_wndView.IsChild(pWnd) || fCursorOutside)) {
  156.                 if (AfxGetAppSettings().nShowBarsWhenFullScreenTimeOut >= 0) {
  157.                     ShowControls(CS_NONE);
  158.                 }
  159.             }
  160.         }
  161.         break;
  162.         case TIMER_FULLSCREENMOUSEHIDER: {
  163.             CPoint p;
  164.             GetCursorPos(&p);
  165.  
  166.             CRect r;
  167.             GetWindowRect(r);
  168.             bool fCursorOutside = !r.PtInRect(p);
  169.             CWnd* pWnd = WindowFromPoint(p);
  170.             if (IsD3DFullScreenMode()) {
  171.                 if (pWnd && !m_bInOptions && *pWnd == *m_pFullscreenWnd) {
  172.                     m_pFullscreenWnd->ShowCursor(false);
  173.                 }
  174.                 KillTimer(TIMER_FULLSCREENMOUSEHIDER);
  175.             } else {
  176.                 if (pWnd && !m_bInOptions && (m_wndView == *pWnd || m_wndView.IsChild(pWnd) || fCursorOutside)) {
  177.                     m_fHideCursor = true;
  178.                     SetCursor(nullptr);
  179.                 }
  180.             }
  181.         }
  182.         break;
  183. 		//统计量
  184.         case TIMER_STATS: {
  185. 			//接收端质量信息：抖动，抖动，视音频同步情况等。。。
  186.             if (m_pQP) {
  187.                 CString rate;
  188.                 rate.Format(_T("%.2f"), m_dSpeedRate);
  189.                 rate = _T("(") + rate + _T("x)");
  190. 				//信息
  191.                 CString info;
  192.                 int val = 0;
  193. 				//平均帧率
  194.                 m_pQP->get_AvgFrameRate(&val); // We hang here due to a lock that never gets released.
  195.                 info.Format(_T("%d.%02d %s"), val / 100, val % 100, rate);
  196.                 m_wndStatsBar.SetLine(ResStr(IDS_AG_FRAMERATE), info);
  197.  
  198.                 int avg, dev;
  199. 				//抖动
  200.                 m_pQP->get_AvgSyncOffset(&avg);
  201.                 m_pQP->get_DevSyncOffset(&dev);
  202.                 info.Format(ResStr(IDS_STATSBAR_SYNC_OFFSET_FORMAT), avg, dev);
  203.                 m_wndStatsBar.SetLine(ResStr(IDS_STATSBAR_SYNC_OFFSET), info);
  204. 				//掉帧
  205.                 int drawn, dropped;
  206.                 m_pQP->get_FramesDrawn(&drawn);
  207.                 m_pQP->get_FramesDroppedInRenderer(&dropped);
  208.                 info.Format(IDS_MAINFRM_6, drawn, dropped);
  209.                 m_wndStatsBar.SetLine(ResStr(IDS_AG_FRAMES), info);
  210. 				//抖动
  211.                 m_pQP->get_Jitter(&val);
  212.                 info.Format(_T("%d ms"), val);
  213.                 m_wndStatsBar.SetLine(ResStr(IDS_STATSBAR_JITTER), info);
  214.             }
  215. 			//缓存信息
  216.             if (m_pBI) {
  217.                 CAtlList<CString> sl;
  218. 				//获取数量
  219.                 for (int i = 0, j = m_pBI->GetCount(); i < j; i++) {
  220.                     int samples, size;
  221. 					//获取缓存状态
  222.                     if (S_OK == m_pBI->GetStatus(i, samples, size)) {
  223.                         CString str;
  224.                         str.Format(_T("[%d]: %03d/%d KB"), i, samples, size / 1024);
  225.                         sl.AddTail(str);
  226.                     }
  227.                 }
  228.  
  229.                 if (!sl.IsEmpty()) {
  230.                     CString str;
  231.                     str.Format(_T("%s (p%u)"), Implode(sl, ' '), m_pBI->GetPriority());
  232.  
  233.                     m_wndStatsBar.SetLine(ResStr(IDS_AG_BUFFERS), str);
  234.                 }
  235.             }
  236. 			//比特率信息
  237.             CInterfaceList<IBitRateInfo> pBRIs;
  238.  
  239.             BeginEnumFilters(m_pGB, pEF, pBF) {
  240.                 BeginEnumPins(pBF, pEP, pPin) {
  241.                     if (CComQIPtr<IBitRateInfo> pBRI = pPin) {
  242.                         pBRIs.AddTail(pBRI);
  243.                     }
  244.                 }
  245.                 EndEnumPins;
  246.  
  247.                 if (!pBRIs.IsEmpty()) {
  248.                     CAtlList<CString> sl;
  249.  
  250.                     POSITION pos = pBRIs.GetHeadPosition();
  251.                     for (int i = 0; pos; i++) {
  252. 						//比特率接口
  253.                         IBitRateInfo* pBRI = pBRIs.GetNext(pos);
  254. 						//当前比特率
  255.                         DWORD cur = pBRI->GetCurrentBitRate() / 1000;
  256. 						//平均比特率
  257.                         DWORD avg = pBRI->GetAverageBitRate() / 1000;
  258.  
  259.                         if (avg == 0) {
  260.                             continue;
  261.                         }
  262. 						//添加到字符串
  263.                         CString str;
  264.                         if (cur != avg) {
  265.                             str.Format(_T("[%d]: %u/%u Kb/s"), i, avg, cur);
  266.                         } else {
  267.                             str.Format(_T("[%d]: %u Kb/s"), i, avg);
  268.                         }
  269. 						//加入
  270.                         sl.AddTail(str);
  271.                     }
  272.  
  273.                     if (!sl.IsEmpty()) {
  274.                         m_wndStatsBar.SetLine(ResStr(IDS_STATSBAR_BITRATE), Implode(sl, ' ') + ResStr(IDS_STATSBAR_BITRATE_AVG_CUR));
  275.                     }
  276.  
  277.                     break;
  278.                 }
  279.             }
  280.             EndEnumFilters;
  281.  
  282.             if (GetPlaybackMode() == PM_DVD) { // we also use this timer to update the info panel for DVD playback
  283.                 ULONG ulAvailable, ulCurrent;
  284.  
  285.                 // Location
  286.  
  287.                 CString Location('-');
  288.  
  289.                 DVD_PLAYBACK_LOCATION2 loc;
  290.                 ULONG ulNumOfVolumes, ulVolume;
  291.                 DVD_DISC_SIDE Side;
  292.                 ULONG ulNumOfTitles;
  293.                 ULONG ulNumOfChapters;
  294.  
  295.                 if (SUCCEEDED(m_pDVDI->GetCurrentLocation(&loc))
  296.                         && SUCCEEDED(m_pDVDI->GetNumberOfChapters(loc.TitleNum, &ulNumOfChapters))
  297.                         && SUCCEEDED(m_pDVDI->GetDVDVolumeInfo(&ulNumOfVolumes, &ulVolume, &Side, &ulNumOfTitles))) {
  298.                     Location.Format(IDS_MAINFRM_9,
  299.                                     ulVolume, ulNumOfVolumes,
  300.                                     loc.TitleNum, ulNumOfTitles,
  301.                                     loc.ChapterNum, ulNumOfChapters);
  302.                     ULONG tsec = (loc.TimeCode.bHours * 3600)
  303.                                  + (loc.TimeCode.bMinutes * 60)
  304.                                  + (loc.TimeCode.bSeconds);
  305.                     /* This might not always work, such as on resume */
  306.                     if (loc.ChapterNum != m_lCurrentChapter) {
  307.                         m_lCurrentChapter = loc.ChapterNum;
  308.                         m_lChapterStartTime = tsec;
  309.                     } else {
  310.                         /* If a resume point was used, and the user chapter jumps,
  311.                         then it might do some funky time jumping.  Try to 'fix' the
  312.                         chapter start time if this happens */
  313.                         if (m_lChapterStartTime > tsec) {
  314.                             m_lChapterStartTime = tsec;
  315.                         }
  316.                     }
  317.                 }
  318.  
  319.                 m_wndInfoBar.SetLine(ResStr(IDS_INFOBAR_LOCATION), Location);
  320.  
  321.                 // Video
  322.  
  323.                 CString Video('-');
  324.  
  325.                 DVD_VideoAttributes VATR;
  326.  
  327.                 if (SUCCEEDED(m_pDVDI->GetCurrentAngle(&ulAvailable, &ulCurrent))
  328.                         && SUCCEEDED(m_pDVDI->GetCurrentVideoAttributes(&VATR))) {
  329.                     Video.Format(IDS_MAINFRM_10,
  330.                                  ulCurrent, ulAvailable,
  331.                                  VATR.ulSourceResolutionX, VATR.ulSourceResolutionY, VATR.ulFrameRate,
  332.                                  VATR.ulAspectX, VATR.ulAspectY);
  333.                 }
  334.  
  335.                 m_wndInfoBar.SetLine(ResStr(IDS_INFOBAR_VIDEO), Video);
  336.  
  337.                 // Audio
  338.  
  339.                 CString Audio('-');
  340.  
  341.                 DVD_AudioAttributes AATR;
  342.  
  343.                 if (SUCCEEDED(m_pDVDI->GetCurrentAudio(&ulAvailable, &ulCurrent))
  344.                         && SUCCEEDED(m_pDVDI->GetAudioAttributes(ulCurrent, &AATR))) {
  345.                     CString lang;
  346.                     if (AATR.Language) {
  347.                         int len = GetLocaleInfo(AATR.Language, LOCALE_SENGLANGUAGE, lang.GetBuffer(64), 64);
  348.                         lang.ReleaseBufferSetLength(max(len - 1, 0));
  349.                     } else {
  350.                         lang.Format(IDS_AG_UNKNOWN, ulCurrent + 1);
  351.                     }
  352.  
  353.                     switch (AATR.LanguageExtension) {
  354.                         case DVD_AUD_EXT_NotSpecified:
  355.                         default:
  356.                             break;
  357.                         case DVD_AUD_EXT_Captions:
  358.                             lang += _T(" (Captions)");
  359.                             break;
  360.                         case DVD_AUD_EXT_VisuallyImpaired:
  361.                             lang += _T(" (Visually Impaired)");
  362.                             break;
  363.                         case DVD_AUD_EXT_DirectorComments1:
  364.                             lang += _T(" (Director Comments 1)");
  365.                             break;
  366.                         case DVD_AUD_EXT_DirectorComments2:
  367.                             lang += _T(" (Director Comments 2)");
  368.                             break;
  369.                     }
  370.  
  371.                     CString format = GetDVDAudioFormatName(AATR);
  372.  
  373.                     Audio.Format(IDS_MAINFRM_11,
  374.                                  lang,
  375.                                  format,
  376.                                  AATR.dwFrequency,
  377.                                  AATR.bQuantization,
  378.                                  AATR.bNumberOfChannels,
  379.                                  (AATR.bNumberOfChannels > 1 ? ResStr(IDS_MAINFRM_13) : ResStr(IDS_MAINFRM_12)));
  380.  
  381.                     m_wndStatusBar.SetStatusBitmap(
  382.                         AATR.bNumberOfChannels == 1 ? IDB_AUDIOTYPE_MONO
  383.                         : AATR.bNumberOfChannels >= 2 ? IDB_AUDIOTYPE_STEREO
  384.                         : IDB_AUDIOTYPE_NOAUDIO);
  385.                 }
  386.  
  387.                 m_wndInfoBar.SetLine(ResStr(IDS_INFOBAR_AUDIO), Audio);
  388.  
  389.                 // Subtitles
  390.  
  391.                 CString Subtitles('-');
  392.  
  393.                 BOOL bIsDisabled;
  394.                 DVD_SubpictureAttributes SATR;
  395.  
  396.                 if (SUCCEEDED(m_pDVDI->GetCurrentSubpicture(&ulAvailable, &ulCurrent, &bIsDisabled))
  397.                         && SUCCEEDED(m_pDVDI->GetSubpictureAttributes(ulCurrent, &SATR))) {
  398.                     CString lang;
  399.                     int len = GetLocaleInfo(SATR.Language, LOCALE_SENGLANGUAGE, lang.GetBuffer(64), 64);
  400.                     lang.ReleaseBufferSetLength(max(len - 1, 0));
  401.  
  402.                     switch (SATR.LanguageExtension) {
  403.                         case DVD_SP_EXT_NotSpecified:
  404.                         default:
  405.                             break;
  406.                         case DVD_SP_EXT_Caption_Normal:
  407.                             lang += _T("");
  408.                             break;
  409.                         case DVD_SP_EXT_Caption_Big:
  410.                             lang += _T(" (Big)");
  411.                             break;
  412.                         case DVD_SP_EXT_Caption_Children:
  413.                             lang += _T(" (Children)");
  414.                             break;
  415.                         case DVD_SP_EXT_CC_Normal:
  416.                             lang += _T(" (CC)");
  417.                             break;
  418.                         case DVD_SP_EXT_CC_Big:
  419.                             lang += _T(" (CC Big)");
  420.                             break;
  421.                         case DVD_SP_EXT_CC_Children:
  422.                             lang += _T(" (CC Children)");
  423.                             break;
  424.                         case DVD_SP_EXT_Forced:
  425.                             lang += _T(" (Forced)");
  426.                             break;
  427.                         case DVD_SP_EXT_DirectorComments_Normal:
  428.                             lang += _T(" (Director Comments)");
  429.                             break;
  430.                         case DVD_SP_EXT_DirectorComments_Big:
  431.                             lang += _T(" (Director Comments, Big)");
  432.                             break;
  433.                         case DVD_SP_EXT_DirectorComments_Children:
  434.                             lang += _T(" (Director Comments, Children)");
  435.                             break;
  436.                     }
  437.  
  438.                     if (bIsDisabled) {
  439.                         lang = _T("-");
  440.                     }
  441.  
  442.                     Subtitles.Format(_T("%s"),
  443.                                      lang);
  444.                 }
  445.  
  446.                 m_wndInfoBar.SetLine(ResStr(IDS_INFOBAR_SUBTITLES), Subtitles);
  447.             } else if (GetPlaybackMode() == PM_CAPTURE && AfxGetAppSettings().iDefaultCaptureDevice == 1) {
  448.                 CComQIPtr<IBDATuner> pTun = m_pGB;
  449.                 BOOLEAN bPresent;
  450.                 BOOLEAN bLocked;
  451.                 LONG lDbStrength;
  452.                 LONG lPercentQuality;
  453.                 CString Signal;
  454.  
  455.                 if (SUCCEEDED(pTun->GetStats(bPresent, bLocked, lDbStrength, lPercentQuality)) && bPresent) {
  456.                     Signal.Format(ResStr(IDS_STATSBAR_SIGNAL_FORMAT), (int)lDbStrength, lPercentQuality);
  457.                     m_wndStatsBar.SetLine(ResStr(IDS_STATSBAR_SIGNAL), Signal);
  458.                 }
  459.             } else if (GetPlaybackMode() == PM_FILE) {
  460.                 UpdateChapterInInfoBar();
  461.             }
  462.  
  463.             if (GetMediaState() == State_Running && !m_fAudioOnly) {
  464.                 BOOL fActive = FALSE;
  465.                 if (SystemParametersInfo(SPI_GETSCREENSAVEACTIVE, 0,       &fActive, 0)) {
  466.                     SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE,   nullptr,     SPIF_SENDWININICHANGE); // this might not be needed at all...
  467.                     SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, fActive, nullptr,     SPIF_SENDWININICHANGE);
  468.                 }
  469.  
  470.                 fActive = FALSE;
  471.                 if (SystemParametersInfo(SPI_GETPOWEROFFACTIVE, 0,       &fActive, 0)) {
  472.                     SystemParametersInfo(SPI_SETPOWEROFFACTIVE, FALSE,   nullptr,     SPIF_SENDWININICHANGE); // this might not be needed at all...
  473.                     SystemParametersInfo(SPI_SETPOWEROFFACTIVE, fActive, nullptr,     SPIF_SENDWININICHANGE);
  474.                 }
  475.                 // prevent screensaver activate, monitor sleep/turn off after playback
  476.                 SetThreadExecutionState(ES_SYSTEM_REQUIRED | ES_DISPLAY_REQUIRED);
  477.             }
  478.         }
  479.         break;
  480.         case TIMER_STATUSERASER: {
  481.             KillTimer(TIMER_STATUSERASER);
  482.             m_playingmsg.Empty();
  483.         }
  484.         break;
  485.         case TIMER_DVBINFO_UPDATER:
  486.             KillTimer(TIMER_DVBINFO_UPDATER);
  487.             ShowCurrentChannelInfo(false, false);
  488.             break;
  489.     }
  490.  
  491.     __super::OnTimer(nIDEvent);
  492. }


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