waveplaydlg.cpp

来自「《Visual C++视频技术方案宝典》配套光盘」· C++ 代码 · 共 265 行

// WavePlayDlg.cpp : implementation file
//

#include "stdafx.h"
#include "WavePlay.h"
#include "WavePlayDlg.h"

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

#include <MMSystem.h>
#pragma comment(lib, "winmm.lib")

WAVEFORMATEX waveformat;
PWAVEHDR hdr;
HWAVEOUT out;
LPSTR lptr;
HANDLE hData;
DWORD size;

/////////////////////////////////////////////////////////////////////////////
// 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()

/////////////////////////////////////////////////////////////////////////////
// CWavePlayDlg dialog

CWavePlayDlg::CWavePlayDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CWavePlayDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CWavePlayDlg)
		// 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 CWavePlayDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CWavePlayDlg)
	DDX_Control(pDX, IDC_SAMPLESIZE, m_samplesize);
	DDX_Control(pDX, IDC_SAMPLEPER, m_sampleper);
	DDX_Control(pDX, IDC_CHANNEL, m_channel);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CWavePlayDlg, CDialog)
	//{{AFX_MSG_MAP(CWavePlayDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_PLAY, OnPlay)
	ON_BN_CLICKED(IDC_ADDPATH, OnAddpath)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CWavePlayDlg message handlers

BOOL CWavePlayDlg::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
	
	GetDlgItem(IDC_PATH)->EnableWindow(false);
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CWavePlayDlg::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 CWavePlayDlg::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 CWavePlayDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}


void CWavePlayDlg::OnAddpath() 
{
	CString strname;
	TCHAR file[255];
	CFileDialog filedlg(TRUE,NULL,NULL,NULL,"文件(*.wav)|*.wav||");
	if(filedlg.DoModal()==IDOK)
	{
		strname=filedlg.GetPathName();
		GetDlgItem(IDC_PATH)->SetWindowText(strname);
	}	
	else
		return;
	HMMIO hmmio; 
	MMCKINFO*ciRiffChunk=new MMCKINFO; 
    MMCKINFO*ciSubChunk=new MMCKINFO;
	memset(ciRiffChunk ,0,sizeof(MMCKINFO));
	memset(ciSubChunk ,0,sizeof(MMCKINFO));

	wsprintf(file,_T("%s"),strname);

	hmmio = mmioOpen(file,NULL,MMIO_READ|MMIO_ALLOCBUF);

	ciRiffChunk->fccType   = mmioFOURCC('W', 'A', 'V', 'E');
	mmioDescend(hmmio, ciRiffChunk, NULL, MMIO_FINDRIFF);

	ciSubChunk->ckid = mmioStringToFOURCC("fmt", 0);
	mmioDescend(hmmio, ciSubChunk,ciRiffChunk,MMIO_FINDCHUNK);
	DWORD fmtsize;
	fmtsize=ciSubChunk->cksize;

	mmioRead(hmmio, (HPSTR)&waveformat, fmtsize);
	mmioAscend(hmmio, ciSubChunk, 0);
	CString tmp;
	tmp.Format("%d 位/秒",waveformat.nSamplesPerSec);
	m_sampleper.SetWindowText(tmp);
	tmp.Format("%d 位",waveformat.wBitsPerSample);
	m_samplesize.SetWindowText(tmp);
	tmp.Format("%d 个",waveformat.nChannels);
	m_channel.SetWindowText(tmp);
	ciSubChunk->ckid =  mmioStringToFOURCC("data", 0);
	mmioDescend(hmmio, ciSubChunk,ciRiffChunk,MMIO_FINDCHUNK);
	
	size=ciSubChunk->cksize;
	
	hData=GlobalAlloc(GMEM_MOVEABLE, size);
	lptr=(char*)GlobalLock(hData);

	mmioRead(hmmio,lptr,size);
	mmioAscend(hmmio, ciSubChunk, 0);
	mmioAscend(hmmio, ciRiffChunk, 0);
    mmioClose(hmmio, 0);

}

void CWavePlayDlg::OnPlay() 
{
	hdr=new WAVEHDR;
	hdr->dwBufferLength=size;
	hdr->lpData=(char*)lptr;
	hdr->dwFlags=WHDR_BEGINLOOP|WHDR_ENDLOOP;
	hdr->dwLoops=1;
	hdr->lpNext=NULL;
	hdr->dwUser=0;
	hdr->dwBytesRecorded=0;
	hdr->reserved=0;

	waveOutOpen(&out,WAVE_MAPPER,&waveformat,(DWORD)this->m_hWnd,0,CALLBACK_WINDOW);
	waveOutPrepareHeader(out,hdr,sizeof(WAVEHDR));
	waveOutWrite(out,hdr,sizeof(WAVEHDR));
}

BOOL CWavePlayDlg::DestroyWindow() 
{
	waveOutUnprepareHeader(out,hdr,sizeof(WAVEHDR));
	GlobalLock(hData);
	GlobalFree(hData);
	out=NULL;
	return CDialog::DestroyWindow();
}