實驗8 數(shù)字視頻播放器120515修改

1、實驗8 數(shù)字視頻播放器實驗目的：1. 進一步掌握MCI函數(shù)的應用。2. 制作數(shù)字視頻播放器，并具有以下功能：打開視頻播放設備，播放視頻文件，可靜態(tài)觀看每一幀視頻，并且可設置播放速度，還能在全屏播放與正常播放之間轉換。實驗步驟：一 如實驗1建立應用程序框架二 制作應用程序界面1. 制作對話框對話框控件屬性表控件ID標題控件ID標題pictrueIDC_DISPLAY StaticIDC_PLAY_SOUNDGroup BoxIDC_STATIC視頻信息StaticIDC_FRAMESStaticIDC_STATIC視頻文件名：StaticIDC_DEMENSIONStaticIDC_STATIC

2、播放速度：ButtonIDC_OPEN打開StaticIDC_STATIC是否靜音：ButtonIDC_PLAY播放StaticIDC_STATIC視頻幀數(shù)：ButtonIDC_PAUSE暫停StaticIDC_STATIC視頻尺寸：ButtonIDC_PRE上一幀StaticIDC_VIDEO_NAMEButtonIDC_NEXT下一幀StaticIDC_PLAY_SPEEDButtonIDC_STOP停止現(xiàn)在在應用程序中插入一個對話框資源（插入資源對話框），用來設置播放速度，其ID設為IDD_SPEED:IDD_SPEED對話框控件屬性表控件ID標題Edit BoxIDC_SPEED1Bu

3、ttonIDOK確定ButtonIDCANCEL取消還需象應用程序中插入一個對話框資源，用做視頻輸出窗口，ID為IDD_DISPLAY。2. 制作菜單插入一個菜單資源，將ID設為IDR_MAINFRAME。IDR_MAINFRAME 中的菜單項菜單標題菜單項標題ID文件打開IDC_OPEN關閉IDC_OK選項靜音IDC_SOUND全屏IDC_FULLSCREEN循環(huán)播放IDC_LOOP視頻速度IDC_SPEED在你的主對話框的屬性中的菜單項中，選中IDR_MAINFRAME現(xiàn)在編譯一下，就得到了我們所要的界面。3. 添加消息處理函數(shù)（查看建立類向導）在C*Dlg中需要添加的消息處理函數(shù)ID消息

4、IDC_PLAYBN_CLICKEDIDC_STOPBN_CLICKEDIDC_PAUSEBN_CLICKEDIDC_PREBN_CLICKEDIDC_NEXTBN_CLICKEDIDC_OPENBN_CLICKEDIDC_SPEEDCOMMANDIDC_FULLSCREENCOMMANDIDC_LOOPCOMMANDIDC_SOUNDCOMMANDC*DlgWM_TIMER然后為IDD_SPEED對話框資源添加一個int m_speed成員變量（選擇IDD_SPEED對話框資源，右鍵選中建立類向導，新建類CSpeed，在該類中選中成員變量一項，選中ID_SPEED1雙擊添加成員變量int m

5、_speed）三 完成應用程序功能設計1. 將已設計好的類Cvideo加到你的工程中來（先把文件video.cpp和video.h拷貝到工程文件目錄，在fileview中分別選擇源文件和頭文件目錄，右鍵選擇將文件添加到工程中，把這兩個文件添加進工程目錄中），并使C*Dlg的頭文件包含該類的頭文件（#include “video.h”; #include “speed.h” ），然后在C*Dlg類的聲明中加入以下代碼：protected:CVideo m_Video;bool m_bIsOpen;bool m_bSound;bool m_bLoop;bool m_bFullScreen;CDia

6、log *display;2. 初始化你的主對話框在OnInitDlialog()中/ TODO: Add extra initialization here后加入以下代碼：display=new CDialog;display->Create(IDD_DISPLAY);SetTimer(1,100,NULL);3. 完成消息函數(shù)OnTimer, OnOpen, OnPlay, OnStop, OnPause,OnPre, OnNext, OnSound, OnLoop, OnFullScreen, OnSpeedvoid CVideoPlayerDlg:OnTimer(UINT nID

7、Event) / TODO: Add your message handler code here and/or call defaultCWnd *m_pWnd=GetDlgItem(IDC_PLAY);m_pWnd->EnableWindow(m_bIsOpen);m_pWnd=GetDlgItem(IDC_PAUSE);m_pWnd->EnableWindow(m_bIsOpen);m_pWnd=GetDlgItem(IDC_STOP);m_pWnd->EnableWindow(m_bIsOpen);m_pWnd=GetDlgItem(IDC_NEXT);m_pWnd-

8、>EnableWindow(m_bIsOpen);m_pWnd=GetDlgItem(IDC_PRE);m_pWnd->EnableWindow(m_bIsOpen);if(m_bIsOpen)CString Info;Info.Format("當前播放幀數(shù):%d",m_Video.GetFrame();m_pWnd=GetDlgItem(IDC_DISPLAY);/獲得靜態(tài)圖像控件位置CClientDC dc(m_pWnd);CRect rect;CBrush brush(COLORREF(0),*OldBrush;OldBrush=(CBrush*)dc.S

9、electObject(brush);m_pWnd->GetClientRect(rect);/獲得靜態(tài)圖像控件大小dc.SetTextColor(COLORREF RGB(0,0,255);dc.SetBkColor(COLORREF RGB(0,0,0);dc.FillRect(rect,&brush);CSize size=dc.GetTextExtent(Info);/獲得文本尺寸dc.TextOut(rect.Width()-size.cx)/2,(rect.Height()-size.cy)/2,Info);dc.SelectObject(&OldBrush)

10、;CString str;str.Format("%d",m_Video.GetSpeed();SetDlgItemText(IDC_PLAY_SPEED,str);str.Format("%d",m_Video.GetFrames();SetDlgItemText(IDC_FRAMES,str);if(m_Video.GetSound()str=_T("否");elsestr=_T("是");SetDlgItemText(IDC_PLAY_SOUND,str);CDialog:OnTimer(nIDEvent);

11、void CVideoPlayerDlg:OnOpen() / TODO: Add your control notification handler code hereCString Filter,str;Filter=" 視頻文件(*.AVI)|*.AVI|"/ 得到窗口尺寸CRect rect;this->GetWindowRect(rect);CFileDialog FileDlg(true,NULL,NULL,OFN_HIDEREADONLY,Filter);if(FileDlg.DoModal()=IDOK)/單擊文件選擇對話框的“確定”鍵if(!m_Vi

12、deo.Open(FileDlg.GetPathName(),display,0,0)/打開視頻文件MessageBox("不能打開文件!","Error",MB_OK|MB_ICONSTOP);return;/將顯示屏幕定位在主對話框的下方，并根據(jù)視頻大小確定屏幕大小int Border,Caption;Border=GetSystemMetrics(SM_CXSIZEFRAME);Caption=GetSystemMetrics(SM_CYCAPTION);display->SetWindowPos(this,rect.left+30,rect

13、.bottom+30,m_Video.GetWidth()+Border,m_Video.GetHeight()+Caption+Border,SWP_SHOWWINDOW);display->ShowWindow(true);display->SetWindowText(FileDlg.GetFileName();SetDlgItemText(IDC_VIDEO_NAME,FileDlg.GetFileName();str.Format("%d×%d",m_Video.GetWidth(),m_Video.GetHeight();SetDlgItem

14、Text(IDC_DEMENSION,str);m_bIsOpen=true;void CVideoPlayerDlg:OnPlay() / TODO: Add your control notification handler code herem_Video.Play(m_bLoop,m_bFullScreen);void CVideoPlayerDlg:OnStop() / TODO: Add your control notification handler code herem_Video.Stop();void CVideoPlayerDlg:OnPause() / TODO: A

15、dd your control notification handler code herem_Video.Pause();void CVideoPlayerDlg:OnPre() / TODO: Add your control notification handler code herem_Video.Backward(1);void CVideoPlayerDlg:OnNext() / TODO: Add your control notification handler code herem_Video.Forward(1);void CVideoPlayerDlg:OnSound()

16、 / TODO: Add your command handler code herem_bSound=!m_bSound;m_Video.SetSound(m_bSound);void CVideoPlayerDlg:OnSpeed() / TODO: Add your command handler code hereCSpeed dlg;dlg.m_speed=m_Video.GetSpeed();if(dlg.DoModal()=IDOK)m_Video.SetSpeed(dlg.m_speed);void CVideoPlayerDlg:OnFullscreen() / TODO:

17、Add your command handler code herem_bFullScreen=!m_bFullScreen;void CVideoPlayerDlg:OnLoop() / TODO: Add your command handler code herem_bLoop=!m_bLoop;現(xiàn)在編譯執(zhí)行，視頻播放器變完成了。實驗注意事項：1. 調試程序時，Ctrl+F7 為Compile，Build為F7，運行時按F5。2. 注意可重用類CVideo的設計。3. 熟練掌握MCI多媒體函數(shù)的應用。4. 編譯時，菜單選中“項目”à“設置”，要在庫的鏈接中加入winmm.lib

18、。/ Video.cpp: implementation of the CVideo class./#include "stdafx.h"#include "Video.h"#ifdef _DEBUG#undef THIS_FILEstatic char THIS_FILE=_FILE_;#define new DEBUG_NEW#endif/ Construction/Destruction/CVideo:CVideo()/ 初始化成員變量m_bOpened = m_bPaused = m_bPlaying = FALSE;m_wDeviceID =

19、0;CVideo:CVideo()Close ();BOOL CVideo:Open (CString Filename, CWnd *pWnd, int left, int top)if (!m_bOpened)/ 初始化成員變量m_bOpened = m_bPaused = m_bPlaying = FALSE;m_wDeviceID = 0;/ 文件是否存在CFileStatus Status;if (!CFile:GetStatus (Filename, Status)return FALSE;/ 打開設備MCI_DGV_OPEN_PARMS OpenParms;OpenParms.l

20、pstrDeviceType = "avivideo"/設置播放設備為視頻播放設備OpenParms.lpstrElementName = (LPSTR) Filename.GetBuffer (0);OpenParms.wDeviceID = 0;OpenParms.hWndParent = pWnd->m_hWnd;/將要播放視頻文件的主窗口OpenParms.dwStyle = WS_CHILD | WS_VISIBLE;if (mciSendCommand (NULL, MCI_OPEN, MCI_WAIT | MCI_OPEN_TYPE | MCI_OPEN

21、_ELEMENT | MCI_DGV_OPEN_PARENT | MCI_DGV_OPEN_WS, (DWORD)(LPVOID) &OpenParms)return FALSE;m_wDeviceID = OpenParms.wDeviceID;m_bOpened = TRUE;/ 將文件長度設置為幀MCI_DGV_SET_PARMS SetParms;SetParms.dwTimeFormat = MCI_FORMAT_FRAMES;if (mciSendCommand (m_wDeviceID, MCI_SET, MCI_SET_TIME_FORMAT, (DWORD)(LPVO

22、ID) &SetParms)Close ();return FALSE;/ 找到視頻文件的開始位置mciSendCommand (m_wDeviceID, MCI_SEEK, MCI_SEEK_TO_START, NULL);/將播放畫面置于主窗口之中MCI_DGV_PUT_PARMS PutParms;PutParms.rc.left = left;PutParms.rc.top = top;PutParms.rc.right = GetWidth ();PutParms.rc.bottom = GetHeight ();if (mciSendCommand (m_wDeviceID

23、, MCI_PUT, MCI_WAIT | MCI_DGV_PUT_CLIENT | MCI_DGV_PUT_WINDOW | MCI_DGV_RECT, (DWORD)(LPVOID) &PutParms)Close ();return FALSE;return TRUE;void CVideo:Close (void)if (m_bOpened)/ 停止播放并關閉設備if (m_bPlaying | m_bPaused)mciSendCommand (m_wDeviceID, MCI_STOP, NULL, NULL);mciSendCommand (m_wDeviceID, MC

24、I_CLOSE, NULL, NULL);/ 清空成員變量m_bOpened = m_bPaused = m_bPlaying = FALSE;m_wDeviceID = 0;/獲得視頻文件窗口的寬度int CVideo:GetWidth (void)if (m_bOpened)MCI_DGV_WHERE_PARMS WhereParms;if (mciSendCommand (m_wDeviceID, MCI_WHERE, MCI_DGV_WHERE_SOURCE, (DWORD)(LPVOID) &WhereParms)return 0;return (int) WhereParm

25、s.rc.right;return 0;/獲得視頻文件窗口的高度int CVideo:GetHeight (void)if (m_bOpened)MCI_DGV_WHERE_PARMS WhereParms;if (mciSendCommand (m_wDeviceID, MCI_WHERE, MCI_DGV_WHERE_SOURCE, (DWORD)(LPVOID) &WhereParms)return 0;return (int) WhereParms.rc.bottom;return 0;BOOL CVideo:Play (BOOL bLoop, BOOL bFullScreen

26、)if (m_bOpened)/ 如果是視頻的尾部則重新開始播放if (GetFrame () >= GetFrames ()mciSendCommand (m_wDeviceID, MCI_SEEK, MCI_SEEK_TO_START, NULL);/ 播放MCI_DGV_PLAY_PARMS PlayParms;PlayParms.dwCallback = NULL;PlayParms.dwFrom = GetFrame ();DWORD dwFlags = MCI_FROM;if (bLoop)dwFlags |= MCI_DGV_PLAY_REPEAT;if (bFullScr

27、een)dwFlags |= MCI_MCIAVI_PLAY_FULLSCREEN;if (mciSendCommand (m_wDeviceID, MCI_PLAY, dwFlags, (DWORD)(LPVOID) &PlayParms)return FALSE;m_bPaused = FALSE;m_bPlaying = TRUE;return TRUE;return FALSE;void CVideo:Stop (void)if (m_bOpened && m_bPlaying)mciSendCommand (m_wDeviceID, MCI_STOP, NUL

28、L, NULL);mciSendCommand (m_wDeviceID, MCI_SEEK, MCI_SEEK_TO_START, NULL);m_bPlaying = FALSE;m_bPaused = FALSE;void CVideo:Pause( void )if (m_bOpened && m_bPlaying)MCI_DGV_PAUSE_PARMS PauseParms;if (mciSendCommand (m_wDeviceID, MCI_PAUSE, 0, (DWORD)(LPVOID) &PauseParms)return;m_bPaused =

29、TRUE;int CVideo:GetFrames (void)if (m_bOpened)MCI_DGV_STATUS_PARMS StatusParms;StatusParms.dwItem = MCI_STATUS_LENGTH;if (mciSendCommand (m_wDeviceID, MCI_STATUS, MCI_WAIT | MCI_STATUS_ITEM, (DWORD)(LPVOID) &StatusParms)return 0;return (int) StatusParms.dwReturn;return 0;int CVideo:GetFrame (voi

30、d)if (m_bOpened)MCI_DGV_STATUS_PARMS StatusParms;StatusParms.dwItem = MCI_STATUS_POSITION;if (mciSendCommand (m_wDeviceID, MCI_STATUS, MCI_WAIT | MCI_STATUS_ITEM, (DWORD)(LPVOID) &StatusParms)return -1;return (int) StatusParms.dwReturn;return -1;BOOL CVideo:IsPlaying (BOOL *pbPaused)*pbPaused =

31、m_bPaused;if (m_bOpened)MCI_DGV_STATUS_PARMS StatusParms;StatusParms.dwItem = MCI_STATUS_MODE;if (mciSendCommand (m_wDeviceID, MCI_STATUS, MCI_WAIT | MCI_STATUS_ITEM, (DWORD)(LPVOID) &StatusParms)return FALSE;if (StatusParms.dwReturn = MCI_MODE_PLAY)m_bPlaying = TRUE;m_bPaused = FALSE;return TRU

32、E;else if (StatusParms.dwReturn = MCI_MODE_PAUSE)m_bPlaying = TRUE;m_bPaused = FALSE;return TRUE;elsem_bPlaying = FALSE;m_bPaused = FALSE;return FALSE;return FALSE;BOOL CVideo:SeekTo (int nFrame)if (m_bOpened)MCI_SEEK_PARMS SeekParms;SeekParms.dwTo = nFrame;if (m_bPlaying && !m_bPaused)mciSe

33、ndCommand (m_wDeviceID, MCI_PAUSE, 0, NULL);if (mciSendCommand (m_wDeviceID, MCI_SEEK, MCI_TO | MCI_WAIT, (DWORD)(LPVOID) &SeekParms)return FALSE;if (m_bPlaying && !m_bPaused)Play ();return TRUE;return FALSE;void CVideo:Forward (int nFrames)if (m_bOpened)if (m_bPlaying && !m_bPau

34、sed)Pause ();MCI_DGV_STEP_PARMS StepParms;StepParms.dwFrames = nFrames;mciSendCommand (m_wDeviceID, MCI_STEP, MCI_DGV_STEP_FRAMES, (DWORD)(LPVOID) &StepParms);void CVideo:Backward (int nFrames)if (m_bOpened)if (m_bPlaying && !m_bPaused)Pause ();MCI_DGV_STEP_PARMS StepParms;StepParms.dwFrames = nFrames;mciSendCommand (m_wDeviceID, MCI_STEP, MC