mp3infotestdlg.cpp

MP3播放器

// MP3InfoTestDlg.cpp : implementation file
//

#include "stdafx.h"
#include "MP3InfoTest.h"
#include "MP3InfoTestDlg.h"

#include <strstrea.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()

/////////////////////////////////////////////////////////////////////////////
// CMP3InfoTestDlg dialog

CMP3InfoTestDlg::CMP3InfoTestDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMP3InfoTestDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMP3InfoTestDlg)
	m_strFile = _T("");
	m_strInfo = _T("");
	m_strTitle = _T("");
	m_nTrack = 0;
	m_strArtist = _T("");
	m_strAlbum = _T("");
	m_strComment = _T("");
	m_strYear = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMP3InfoTestDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMP3InfoTestDlg)
	DDX_Control(pDX, IDC_GENRE, m_wndGenre);
	DDX_Text(pDX, IDC_FILE, m_strFile);
	DDX_Text(pDX, IDC_INFO, m_strInfo);
	DDX_Text(pDX, IDC_TITLE, m_strTitle);
	DDX_Text(pDX, IDC_TRACK, m_nTrack);
	DDX_Text(pDX, IDC_ARTIST, m_strArtist);
	DDX_Text(pDX, IDC_ALBUM, m_strAlbum);
	DDX_Text(pDX, IDC_COMMENT, m_strComment);
	DDX_Text(pDX, IDC_YEAR, m_strYear);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMP3InfoTestDlg, CDialog)
	//{{AFX_MSG_MAP(CMP3InfoTestDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BROWSE, OnBrowse)
	ON_EN_CHANGE(IDC_FILE, OnChangeFile)
	ON_BN_CLICKED(IDC_SAVE, OnSave)
	ON_BN_CLICKED(IDC_CLEAR, OnClear)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMP3InfoTestDlg message handlers

BOOL CMP3InfoTestDlg::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
	
	m_strInfo = "Open an MP3 file to see its information.";
	UpdateData(FALSE);

	m_wndGenre.AddString("");
	for (int i = 0; i < g_nMP3GenreCount; i++)
		m_wndGenre.AddString(g_arrMP3Genre[i]);
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CMP3InfoTestDlg::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 CMP3InfoTestDlg::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 CMP3InfoTestDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CMP3InfoTestDlg::OnBrowse() 
{
	CFileDialog fd(TRUE,"mp3",NULL,OFN_HIDEREADONLY,
		"MP3's (*.mp3)|*.mp3|All Files (*.*)|*.*||",this);
	if (fd.DoModal() == IDOK)
	{
		m_strFile = fd.GetPathName();
		UpdateData(FALSE);
		OnChangeFile();
	}
}

ostream& operator<<(ostream& stream, const ENMPEGVER& n)
{
	switch (n)
	{
		case MPEGVER_NA: stream << "N/A"; break;
		case MPEGVER_25: stream << "MPEG 2.5"; break;
		case MPEGVER_2: stream << "MPEG 2"; break;
		case MPEGVER_1: stream << "MPEG 1"; break;
	}

	return stream;
}

ostream& operator<<(ostream& stream, const ENCHANNELMODE& n)
{
	switch (n)
	{
		case MP3CM_STEREO: stream << "Stereo"; break;
		case MP3CM_JOINT_STEREO: stream << "Joint Stereo"; break;
		case MP3CM_DUAL_CHANNEL: stream << "Dual Channel"; break;
		case MP3CM_SINGLE_CHANNEL: stream << "Single Channel"; break;
	}

	return stream;
}

ostream& operator<<(ostream& stream, const ENEMPHASIS& n)
{
	switch (n)
	{
		case MP3EM_NONE: stream << "N/A"; break;
		case MP3EM_50_15_MS: stream << "50/15 ms"; break;
		case MP3EM_RESERVED: stream << "N/A"; break;
		case MP3EM_CCIT_J17: stream << "CCIT J.17"; break;
	}

	return stream;
}

void CMP3InfoTestDlg::OnChangeFile() 
{
	if (!UpdateData())
		return;

	ostrstream s;

	char* endofline = "\r\n";

	CMP3Info mp3;
	if (mp3.Open(m_strFile))
	{
		s << "File: " + mp3.GetFileName() << endofline;
		s << "Validity: ";
		if (mp3.GetValidity() & MP3VLD_DATA_VALID)s << "Data is okay. ";
		if (mp3.GetValidity() & MP3VLD_ID3V1_VALID)s << "ID3v1 tag is okay. ";

		s << endofline << endofline;

		m_strTitle = mp3.GetTitle();
		m_strArtist = mp3.GetArtist();
		m_strAlbum = mp3.GetAlbum();
		m_strComment = mp3.GetComment();
		m_strYear = mp3.GetYear();
		m_nTrack = mp3.GetTrack();
		if (mp3.GetGenreIndex() >= g_nMP3GenreCount)
			m_wndGenre.SetCurSel(0);
		else
			m_wndGenre.SetCurSel(mp3.GetGenreIndex() + 1);

		s << "--- MP3 Frame information ---" << endofline;
		s << "# of frames: " << mp3.GetNumFrames() << endofline;
		s << "Length: " << CMP3Info::GetLengthString(mp3.GetLength()) << " seconds" << endofline;
		s << "MPEG Type: " << mp3.GetMPEGVersion() << " Layer " << mp3.GetMPEGLayer() << endofline;
		s << "CRC: " << (mp3.HasCRC() ? "Yes" : "No") << endofline;
		s << "Bitrate: " << mp3.GetBitRate() << " kbps" << endofline;
		s << "Sample Rate: " << mp3.GetSampleRate() << endofline;
		s << "Channel Mode: " << mp3.GetChannelMode() << endofline;
		s << "Emphasis: " << mp3.GetEmphasis() << endofline;
		s << "Copyrighted: " << (mp3.IsCopyrighted() ? "Yes" : "No") << endofline;
		s << "Original: " << (mp3.IsOriginal() ? "Yes" : "No") << endofline;
	}
	else
	{
		m_strTitle = "";
		m_strArtist = "";
		m_strAlbum = "";
		m_strComment = "";
		m_strYear = "";
		m_nTrack = 0;
		m_wndGenre.SetCurSel(-1);

		s << "Error reading MP3 information from file '" << m_strFile << "'." << endofline;
	}

	s << (char)0;

	m_strInfo = s.str();

	UpdateData(FALSE);
}

void CMP3InfoTestDlg::OnSave() 
{
	if (!UpdateData())
		return;

	CMP3Info mp3;
	mp3.SetTitle(m_strTitle);
	mp3.SetArtist(m_strArtist);
	mp3.SetAlbum(m_strAlbum);
	mp3.SetComment(m_strComment);
	mp3.SetTrack(m_nTrack);
	mp3.SetYear(m_strYear);
	if (m_wndGenre.GetCurSel() > 0)
		mp3.SetGenreIndex(m_wndGenre.GetCurSel() - 1);
	else
		mp3.SetGenreIndex(255);

	if (!mp3.WriteID3V1(m_strFile))
		AfxMessageBox("*Error* while writing the ID3... oops :(",MB_ICONEXCLAMATION);

	OnChangeFile();
}

void CMP3InfoTestDlg::OnClear() 
{
	CMP3Info mp3;
	if (AfxMessageBox("Are you sure you want to permanently delete the ID3v1??",
		MB_OKCANCEL | MB_ICONEXCLAMATION) == IDOK)
	{
		mp3.WriteID3V1(m_strFile,TRUE);
		OnChangeFile();
	}
}