pidtestdlg.cpp

非常有用的VC视频音频开发所需要的东西 需要有用

// PIDTestDlg.cpp : implementation file
//

#include "stdafx.h"

#include <streams.h>
#include "CDXGraph.h"

#include "IMPEG1Builder.h"
#include <initguid.h>
#include "FltGuids.h"

#include "PIDTest.h"
#include "PIDTestDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CPIDTestDlg dialog

CPIDTestDlg::CPIDTestDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CPIDTestDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CPIDTestDlg)
		// 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);
	m_pGraph = NULL;
}

CPIDTestDlg::~CPIDTestDlg()
{
	if (m_pGraph)
	{
		delete m_pGraph;
		m_pGraph = NULL;
	}
}

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

BEGIN_MESSAGE_MAP(CPIDTestDlg, CDialog)
	//{{AFX_MSG_MAP(CPIDTestDlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(ID_CMD_PAUSE, OnCmdPause)
	ON_BN_CLICKED(ID_CMD_PLAY, OnCmdPlay)
	ON_BN_CLICKED(ID_CMD_STOP, OnCmdStop)
	ON_BN_CLICKED(ID_CMD_OPEN, OnCmdOpen)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CPIDTestDlg message handlers

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

	// 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
	SetWindowPos(&wndTopMost, 0, 0, 0, 0, SWP_NOMOVE|SWP_NOSIZE);
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

// 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 CPIDTestDlg::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 CPIDTestDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CPIDTestDlg::OnCmdOpen() 
{	
	CString      strFilter = "MPEG File (*.mpg;*.mpeg)|*.mpg;*.mpeg|";
	CFileDialog  dlgOpen(TRUE, NULL, NULL, OFN_HIDEREADONLY, strFilter, NULL);
	if (IDOK != dlgOpen.DoModal()) 
	{
		return;
	}

	mSourceFile = dlgOpen.GetPathName();
	// Rebuild the filter graph
	if (m_pGraph)
	{
		m_pGraph->Stop();
		delete m_pGraph;
		m_pGraph = NULL;
	}
	m_pGraph = new CDXGraph();
	m_pGraph->Create();

	IMPEG1Builder * pMPG1Builder = NULL;
	m_pGraph->QueryInterface(IID_IMPEG1Builder, (void**)&pMPG1Builder);
	if (pMPG1Builder)
	{
		pMPG1Builder->Release();
		if (S_OK == pMPG1Builder->IsMPEG1File(mSourceFile))
		{
			pMPG1Builder->RenderMPEG1File(mSourceFile);
			// Automatically play this MPEG1 file
			OnCmdPlay();
		}
		else
		{
			AfxMessageBox("This is not a MPEG1 file!");
		}
	}
}

void CPIDTestDlg::OnCmdPause() 
{
	if (m_pGraph)
	{
		m_pGraph->Pause();
	}
}

void CPIDTestDlg::OnCmdPlay() 
{
	if (m_pGraph)
	{
		m_pGraph->Run();
	}
}

void CPIDTestDlg::OnCmdStop() 
{
	if (m_pGraph)
	{
		m_pGraph->Stop();
	}
}