VC++MP3播放器课程设计实验报告.doc

西安科技大学VC+程序设计课程设计报告 题 目 MP3播放器 院、系(部) 计算机学院软件工程系 专业及班级 软件工程0902 姓 名 王浩 日 期 0908010224 1 题目要求 要求用所学知识编写mp3播放器来实现mp3播放基本功能2 功能需求Mp3播放器基本的添加歌曲，播放，暂停，暂停恢复，停止，下一首，前一首，播放列表，最小化到托盘等3 总体设计3.1 系统模块3.2 系统业务处理流程 4 详细设计1. 新建对话框MFC应用程序2. 添加基类class MCIMP3在头文件中添加#include #pragma comment(lib,winmm.lib)类成员public:MCIMP3();virtual MCIMP3();DWORD MCIOpen(const CString &strPath);DWORD MCIClose();DWORD MCIPlay();DWORD MCIPause();DWORD MCIResume();DWORD MCIStop();DWORD MCISetMute(BOOL bMute);DWORD MCIGetLength(DWORD *dwReturn);DWORD MCIGetPos(DWORD *dwPos);DWORD MCISeekTo(DWORD dwTo);DWORD MCISeekToStart();DWORD MCISeekToEnd();BOOL MCIIsPlaying();BOOL MCIIsOpened();DWORD m_dwLength;protected:MCIDEVICEID m_wID;在类实现文件MCIMP3.cpp中添加如下代码/构造函数MCIMP3:MCIMP3() m_wID=NULL; m_dwLength=0;/析构函数MCIMP3:MCIMP3()MCIClose();/打开MCI设备 参数为文件地址DWORD MCIMP3:MCIOpen(const CString &strPath) MCI_OPEN_PARMS mciOP; DWORD dwReturn; ASSERT(m_wID=NULL); mciOP.lpstrDeviceType=NULL; mciOP.lpstrElementName=strPath; dwReturn=mciSendCommand(NULL,MCI_OPEN,MCI_OPEN_ELEMENT|MCI_WAIT|MCI_OPEN_SHAREABLE, (DWORD)(LPVOID)&mciOP); if (dwReturn=0) m_wID=mciOP.wDeviceID; if(this-MCIGetLength(&m_dwLength)!=0) m_dwLength=0; else m_wID=NULL; return dwReturn;/关闭MCI设备DWORD MCIMP3:MCIClose() MCI_GENERIC_PARMS mciGP; DWORD dwReturn; dwReturn=mciSendCommand(m_wID,MCI_CLOSE,MCI_NOTIFY|MCI_WAIT, (DWORD)(LPVOID)&mciGP); m_wID=NULL; return dwReturn;/播放DWORD MCIMP3:MCIPlay()MCI_PLAY_PARMS mciPP; return mciSendCommand(m_wID,MCI_PLAY,MCI_NOTIFY,(DWORD)(LPVOID)&mciPP);/暂停DWORD MCIMP3:MCIPause()MCI_GENERIC_PARMS mciGP;return mciSendCommand(m_wID,MCI_PAUSE,MCI_NOTIFY|MCI_WAIT,(DWORD)(LPVOID)&mciGP);/继续 （从暂停恢复）DWORD MCIMP3:MCIResume()MCI_GENERIC_PARMS mciGP;return mciSendCommand(m_wID,MCI_RESUME,MCI_NOTIFY|MCI_WAIT,(DWORD)(LPVOID)&mciGP);/停止播放DWORD MCIMP3:MCIStop()MCI_GENERIC_PARMS mciGP;return mciSendCommand(m_wID,MCI_STOP,MCI_NOTIFY|MCI_WAIT,(DWORD)(LPVOID)&mciGP);/到dwTo处DWORD MCIMP3:MCISeekTo(DWORD dwTo) DWORD dwreturn; if (dwTo0& dwTo=m_dwLength) dwreturn=MCISeekToEnd(); else dwreturn=MCISeekToStart(); return dwreturn;/到开始处DWORD MCIMP3:MCISeekToStart()MCI_SEEK_PARMS mciSP;return mciSendCommand(m_wID,MCI_SEEK,MCI_WAIT|MCI_NOTIFY|MCI_SEEK_TO_START,(DWORD)(LPVOID)&mciSP);/到结束处DWORD MCIMP3:MCISeekToEnd() MCI_SEEK_PARMS mciSP; return mciSendCommand(m_wID,MCI_SEEK,MCI_WAIT|MCI_NOTIFY|MCI_SEEK_TO_END, (DWORD)(LPVOID)&mciSP);/得到播放文件长度DWORD MCIMP3:MCIGetLength(DWORD *dwLength)MCI_STATUS_PARMS mciSP;mciSP.dwItem=MCI_STATUS_LENGTH;DWORD dwReturn=mciSendCommand(m_wID,MCI_STATUS,MCI_STATUS_ITEM,(DWORD)(LPVOID)&mciSP);if(dwReturn=0)*dwLength=mciSP.dwReturn/1000;return dwReturn;/得到当前播放文件播放到的地方DWORD MCIMP3:MCIGetPos(DWORD *dwPos)MCI_STATUS_PARMS mciSP;mciSP.dwItem=MCI_STATUS_POSITION;DWORD dwReturn=mciSendCommand(m_wID,MCI_STATUS,MCI_STATUS_ITEM,(DWORD)(LPVOID)&mciSP);if(dwReturn=0) *dwPos=mciSP.dwReturn/1000;return dwReturn;/静音DWORD MCIMP3:MCISetMute(BOOL bMute)MCI_SET_PARMS mciSP;mciSP.dwAudio=MCI_SET_AUDIO_ALL;DWORD dwFlags;if(bMute)dwFlags=MCI_WAIT|MCI_SET_AUDIO|MCI_SET_OFF;elsedwFlags=MCI_WAIT|MCI_SET_AUDIO|MCI_SET_ON;return mciSendCommand(m_wID,MCI_SET,dwFlags,(DWORD)(LPVOID)&mciSP);/判断是否播放BOOL MCIMP3:MCIIsPlaying()MCI_STATUS_PARMS mciSP;mciSP.dwItem=MCI_STATUS_MODE;DWORD dwReturn=mciSendCommand(m_wID,MCI_STATUS,MCI_STATUS_ITEM,(DWORD)(LPVOID)&mciSP);if(dwReturn=0)if(mciSP.dwReturn=MCI_MODE_PLAY)return true;return false;/判断是否打开BOOL MCIMP3:MCIIsOpened()MCI_STATUS_PARMS mciSP;mciSP.dwItem=MCI_STATUS_MODE;DWORD dwReturn=mciSendCommand(m_wID,MCI_STATUS,MCI_STATUS_ITEM,(DWORD)(LPVOID)&mciSP);if(dwReturn=0)if(mciSP.dwReturn=MCI_MODE_OPEN|mciSP.dwReturn=MCI_MODE_PLAY|mciSP.dwReturn=MCI_MODE_PAUSE|mciSP.dwReturn=MCI_MODE_STOP|mciSP.dwReturn=MCI_MODE_SEEK)return true;return false;3. 按如图方式添加控件 对话框属性改为无边框，列表框属性也为无边框 编辑框改为只读无边框各按钮以及控件ID以及变量关联如下表控件名控件类型ID变量类型变量关联正在播放静态文本示例编辑框编辑框ID_NAMECStringpath示例编辑框编辑框ID_TIMECStringm_time列表框IDC_LISTCListBoxm_list滑块IDC_SLIDER1CSliderCrtlm_ctrlSlider？按钮ID_ABOUT-按钮ID_MIN退出按钮ID_EXIT添加按钮ID_OPEN上一首按钮ID_PRE播放按钮ID_PLAY暂停按钮ID_PAUSE下一首按钮ID_NEXT继续按钮IDC_RESUME停止按钮ID_STOPList按钮ID_LISTBUTTDel按钮ID_DELLIST4. 在CPlayerDlg.h中在CPlayDlg类内添加pubilc成员变量int flag;int j;int pause;void view();CString str1;CString str;int file1;int play;int time;int nPos;int temp;int i;CString m_Path;MCIMP3 m_mp3player;5. 引入背景位图并改ID为IDB_BEIJING和IDB_BEIJINGM 在OnPaint函数中else后屏蔽CDialog:OnPaint();在后面添加如下代码 if(flag=1)CPaintDC dc(this);CDC memdc;memdc.CreateCompatibleDC(&dc);CBitmap bkg;bkg.LoadBitmap(IDB_BEIJING);BITMAP bkginfo;bkg.GetBitmap(&bkginfo);memdc.SelectObject(&bkg);RECT rect;GetWindowRect(&rect); dc.StretchBlt(0,0,rect.right-rect.left,rect.bottom-rect.top,&memdc,0,0,bkginfo.bmWidth,bkginfo.bmHeight,SRCCOPY);if(flag=0)CPaintDC dc(this);CDC memdc;memdc.CreateCompatibleDC(&dc);CBitmap bkg;bkg.LoadBitmap(IDB_BEIJINGM);BITMAP bkginfo;bkg.GetBitmap(&bkginfo);memdc.SelectObject(&bkg);RECT rect;GetWindowRect(&rect);dc.StretchBlt(0,0,rect.right-rect.left,rect.bottom-rect.top,&memdc,0,0,bkginfo.bmWidth,bkginfo.bmHeight,SRCCOPY);6. 系统托盘实现 在CPlayerDlg类中添加函数toTray(bool show)void CPlayerDlg:toTray(bool show)/ TODO: Add your control notification handler code hereNOTIFYICONDATA pnid;pnid.cbSize=(DWORD)sizeof(NOTIFYICONDATA);pnid.hIcon=AfxGetApp()-LoadIcon(IDR_MAINFRAME);strcpy(pnid.szTip,MP3播放 );pnid.hWnd=m_hWnd;pnid.uCallbackMessage=UM_SHOWWINDOW;pnid.uFlags=NIF_ICON|NIF_MESSAGE|NIF_TIP;pnid.uID=ID_TASKBARICON; pnid.uID=(UINT)m_hIcon; if(show)Shell_NotifyIcon(NIM_ADD,&pnid); ShowWindow(SW_HIDE);elseShell_NotifyIcon(NIM_DELETE,&pnid);ShowWindow(SW_SHOW); 在构造函数中添加ON_MESSAGE(UM_SHOWWINDOW,OnNotifyIcon)到BEGIN_MESSAGE_MAP(CPlayerDlg, CDialog)和END_MESSAGE_MAP()之间添加函数void CPlayerDlg:OnNotifyIcon(WPARAM wParam, LPARAM lParam)switch(lParam)case WM_LBUTTONDBLCLK:toTray(false);break;最后对 按钮- 添加消息响应函数void CPlayerDlg:OnMin() / TODO: Add your control notification handler code heretoTray(true);7. 实现点击对话框拖动 打开classwizard添加WM_LBUTTONDOWNvoid CPlayerDlg:OnLButtonDown(UINT nFlags, CPoint point) / TODO: Add your message handler code here and/or call defaultPostMessage(WM_NCLBUTTONDOWN,HTCAPTION,MAKELPARAM(point.x, point.y);CDialog:OnLButtonDown(nFlags, point);8. 初始化变量 在构造函数中添加m_time = _T();path = _T();i=0;temp=0;nPos=0;play=0;file1=0;pause=0;j=0;flag=0;9. 对？按钮添加消息响应函数void CPlayerDlg:OnAbout() CAboutDlg dlg;dlg.DoModal();10. 对退出按钮添加消息响应函数void CPlayerDlg:OnExit() exit(0);11. 对添加按钮添加消息响应函数void CPlayerDlg:OnOpen() CFileDialog file(TRUE,NULL,NULL,OFN_HIDEREADONLY,MP3 Files (*.mp3)|*.mp3|AVI Files(*.avi)|*.avi|WAV Files(*.wav)|*.wav|WMA Files(*.wma)|*.wma);file.DoModal();m_Path=file.GetPathName();int nIndex=m_list.InsertString(-1,m_Path);m_list.SetCurSel(j);j+;file1=1;12. 对播放按钮添加消息响应函数void CPlayerDlg:OnPlay() if(play=0&file1=1) m_ctrlSlider.SetRange(0,100); SetTimer(1,1000,NULL); m_mp3player.MCIOpen(m_Path);m_mp3player.MCIPlay(); play=1;path=m_Path; UpdateData(FALSE);13. 对暂停按钮添加消息响应函数void CPlayerDlg:OnPause() if(play=1)KillTimer(1);m_mp3player.MCIPause(); pause=1;14. 对继续按钮添加消息响应函数void CPlayerDlg:OnResume() if(play=1&pause=1)SetTimer(1,1000,NULL);m_mp3player.MCIResume();15. 对停止按钮添加消息响应函数void CPlayerDlg:OnStop() if(play=1)m_mp3player.MCIStop();KillTimer(1);m_ctrlSlider.SetPos(0);/ m_mp3player.MCISeekTo(0);m_mp3player.MCIClose(); play=0;file1=0;i=0;view(); UpdateData(FALSE);16.对上一首按钮添加消息响应函数void CPlayerDlg:OnPre() int n=m_list.GetCurSel();if( play=1 & file1=1 & n-1=0)CString p;KillTimer(1);m_list.GetText(n-1,p);m_Path=p;i=0;m_list.SetCurSel(n-1);OnStop();file1 = 1;play = 1;m_mp3player.MCIOpen(m_Path);m_mp3player.MCIPlay();path=m_Path;SetTimer(1,1000,NULL);if(play=1 & file1=1 & n-10)KillTimer(1);m_list.SetCurSel(j-1);CString p;m_list.GetText(j-1,p);m_Path=p;i=0;OnStop();file1 = 1;play = 1;m_mp3player.MCIOpen(m_Path);m_mp3player.MCIPlay();path=m_Path;SetTimer(1,1000,NULL);16. 对下一首添加消息响应函数void CPlayerDlg:OnNext() int n=m_list.GetCurSel(); if( play=1 & file1=1 & n+1=j)n=0;KillTimer(1);m_list.SetCurSel(n);CString p;m_list.GetText(n,p);m_Path=p;i=0;OnStop();file1 = 1;play = 1;m_mp3player.MCIOpen(m_Path);m_mp3player.MCIPlay();path=m_Path;SetTimer(1,1000,NULL);17. 添加定时器响应滑块的移动在classwizard中添加WM_TIMER消息编辑函数void CPlayerDlg:OnTimer(UINT nIDEvent) if(iGetDlgCtrlID()=IDC_SLIDER1&play=1)KillTimer(1); nPos=m_ctrlSlider.GetPos(); time=nPos*m_mp3player.m_dwLength/100;