playwavedlg.cpp

用C++编写的WAV文件操作小例程,方便C语言及C++初学者学习交流

// PlayWaveDlg.cpp : implementation file
//

#include "stdafx.h"
#include "PlayWave.h"
#include "PlayWaveDlg.h"
#include "Mmsystem.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CPlayWaveDlg dialog

CPlayWaveDlg::CPlayWaveDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CPlayWaveDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CPlayWaveDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CPlayWaveDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CPlayWaveDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CPlayWaveDlg, CDialog)
	//{{AFX_MSG_MAP(CPlayWaveDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(ID_BTN_OPEN, OnBtnOpen)
	ON_BN_CLICKED(ID_BTN_PLAY, OnBtnPlay)
	ON_BN_CLICKED(ID_BTN_PAUSE, OnBtnPause)
	ON_BN_CLICKED(ID_BTN_ENDRECORD, OnBtnEndrecord)
	ON_BN_CLICKED(ID_BTN_GOBACK, OnBtnGoback)
	ON_BN_CLICKED(ID_BTN_FORWARD, OnBtnForward)
	ON_BN_CLICKED(ID_BTN_STARTRECORD, OnBtnStartrecord)
	ON_BN_CLICKED(IDC_BTN_EXIT, OnBtnExit)
	ON_BN_CLICKED(ID_BTN_STOP, OnBtnStop)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CPlayWaveDlg message handlers

BOOL CPlayWaveDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	m_wDeviceID = 0;
	m_startnum = 0;
	GetDlgItem(IDC_EDIT_NAME)->SetWindowText("c:\\Windows.wav");
	m_InPlay = false;
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CPlayWaveDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CPlayWaveDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CPlayWaveDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CPlayWaveDlg::OnBtnOpen() 
{

	mciSendCommand (m_wDeviceID, MCI_CLOSE, NULL, NULL);
	CString Filename = "" ;
	GetDlgItem(IDC_EDIT_NAME)->GetWindowText(Filename);

	MCI_OPEN_PARMS OpenParms;
	OpenParms.lpstrDeviceType =(LPCSTR)MCI_DEVTYPE_WAVEFORM_AUDIO;
	OpenParms.lpstrElementName = (LPCSTR) Filename;
	OpenParms.wDeviceID = m_wDeviceID;
	MCIERROR  ret = mciSendCommand (NULL, MCI_OPEN,MCI_WAIT | MCI_OPEN_TYPE |MCI_OPEN_TYPE_ID | MCI_OPEN_ELEMENT,(DWORD)(LPVOID) &OpenParms);
	m_wDeviceID = OpenParms.wDeviceID;
	
}

void CPlayWaveDlg::OnBtnPlay() 
{

	MCI_PLAY_PARMS PlayParms;
	PlayParms.dwFrom = m_startnum;
	MCIERROR  ret = mciSendCommand (m_wDeviceID, MCI_PLAY,MCI_FROM, (DWORD)(LPVOID)&PlayParms);
	m_InPlay = true;
	
}

void CPlayWaveDlg::OnBtnPause() 
{

	mciSendCommand (m_wDeviceID, MCI_PAUSE, NULL, NULL);	

	MCI_STATUS_PARMS mcistatusparms;
	mcistatusparms.dwCallback=(DWORD)GetSafeHwnd();
	mcistatusparms.dwItem=MCI_STATUS_POSITION;
	mcistatusparms.dwReturn=0;
	mciSendCommand(m_wDeviceID,MCI_STATUS,MCI_STATUS_ITEM,(DWORD)&mcistatusparms);
	
	int mret = mcistatusparms.dwReturn;
	m_startnum = MCI_MAKE_HMS(MCI_HMS_HOUR(mret),MCI_HMS_MINUTE(mret),MCI_HMS_SECOND(mret));

	m_InPlay = false;
	
}

void CPlayWaveDlg::OnBtnStop() 
{

	mciSendCommand (m_wDeviceID, MCI_CLOSE, NULL, NULL);
	m_InPlay = false;
	
}

void CPlayWaveDlg::OnBtnEndrecord() 
{

	if(	m_InPlay){
		MessageBox("正在播放声音文件，不能进行停止录音操作!");
		return;
	}

	CTime ct = CTime::GetCurrentTime();
	CString Filename = "";
	Filename.Format("C:\\%04d%02d%02d%02d%02d%02d.wav",ct.GetYear(),ct.GetMonth(),ct.GetDay(),ct.GetHour(),ct.GetMinute(),ct.GetSecond());
	GetDlgItem(IDC_EDIT_NAME)->SetWindowText(Filename);
	MCI_SAVE_PARMS SaveParms;
	SaveParms.lpfilename = (LPCSTR) Filename;
	mciSendCommand (m_wDeviceID, MCI_SAVE,MCI_SAVE_FILE | MCI_WAIT,(DWORD)(LPVOID) &SaveParms);
	mciSendCommand (m_wDeviceID, MCI_CLOSE, NULL, NULL);
	
}

void CPlayWaveDlg::OnBtnGoback() 
{

	if(m_InPlay) OnBtnPause();
	m_startnum = m_startnum - 2000;
	if(m_startnum < 0) m_startnum = 0;
	OnBtnPlay();
	
}

void CPlayWaveDlg::OnBtnForward() 
{

	if(m_InPlay) OnBtnPause();
	m_startnum = m_startnum + 2000;
	if(m_startnum < 0) m_startnum = 0;
	OnBtnPlay();
	
}

void CPlayWaveDlg::OnBtnStartrecord() 
{

	if(	m_InPlay){
		MessageBox("正在播放声音文件，不能进行录音操作!");
		return;
	}

	mciSendCommand (m_wDeviceID, MCI_CLOSE, NULL, NULL);
	CString Filename = "" ;
	MCI_OPEN_PARMS OpenParms;
	OpenParms.lpstrDeviceType =(LPCSTR)MCI_DEVTYPE_WAVEFORM_AUDIO;
	OpenParms.lpstrElementName = (LPCSTR) Filename;
	OpenParms.wDeviceID = m_wDeviceID;
	MCIERROR  ret = mciSendCommand (NULL, MCI_OPEN,MCI_WAIT | MCI_OPEN_TYPE |MCI_OPEN_TYPE_ID | MCI_OPEN_ELEMENT,(DWORD)(LPVOID) &OpenParms);
	m_wDeviceID = OpenParms.wDeviceID;

	MCI_RECORD_PARMS RecordParms;
	mciSendCommand (m_wDeviceID, MCI_RECORD,NULL, (DWORD)(LPVOID)&RecordParms);
	
}

void CPlayWaveDlg::OnBtnExit() 
{
	CDialog::OnCancel();
}