directshoweventdlg.cpp

《Visual C++视频技术方案宝典》配套光盘

// DirectShowEventDlg.cpp : implementation file
//

#include "stdafx.h"
#include "DirectShowEvent.h"
#include "DirectShowEventDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CDirectShowEventDlg dialog

CDirectShowEventDlg::CDirectShowEventDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CDirectShowEventDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CDirectShowEventDlg)
		// 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(IDI_ICON1);
}

void CDirectShowEventDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CDirectShowEventDlg)
	DDX_Control(pDX, IDC_PANEL, m_Panel);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CDirectShowEventDlg, CDialog)
	//{{AFX_MSG_MAP(CDirectShowEventDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_SETFILE, OnSetFile)
	ON_MESSAGE(CM_COMPLETE,Done)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDirectShowEventDlg message handlers

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

	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);
		}
	}

	SetIcon(m_hIcon, TRUE);	
	SetIcon(m_hIcon, FALSE);
	
	m_Completed = FALSE;
	m_Previewed = FALSE;
	m_hThread   = NULL;

	return TRUE; 
}


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

void CDirectShowEventDlg::OnOK() 
{

}

DWORD WINAPI ThreadProc(LPVOID lpParameter )
{
	CDirectShowEventDlg* pWnd = (CDirectShowEventDlg*)lpParameter;
	HANDLE  hEvent;
	pWnd->pEvent->GetEventHandle( (OAEVENT*) &hEvent);
	
	long code,p1,p2;
	BOOL  done = FALSE;
	while (!done)
	{
		if (WaitForSingleObject(hEvent,80)==WAIT_OBJECT_0)
		{
			while (SUCCEEDED( pWnd->pEvent->GetEvent(&code,&p1,&p2,0)))
			{
			
				pWnd->pEvent->FreeEventParams(code,p1,p2);
				if (code==EC_COMPLETE)
				{
					pWnd->m_Completed = TRUE;
					pWnd->SendMessage(CM_COMPLETE);
					done=true;
				}
			}
		}
	}
	return 0 ;
}



void CDirectShowEventDlg::OnSetFile() 
{
	if (! m_Previewed)
	{
		CFileDialog fDlg(TRUE,NULL,NULL,OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,"avi文件|*.avi");
		if (fDlg.DoModal()==IDOK)
		{
			CString strFile= fDlg.GetPathName();
		
			ICaptureGraphBuilder2 * pBuilder = NULL;
			pGraph = NULL;
			pMediaControl = NULL;

			CoCreateInstance(CLSID_CaptureGraphBuilder2,0,CLSCTX_INPROC_SERVER,IID_ICaptureGraphBuilder2,(void**)&pBuilder);
			CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, 
								IID_IGraphBuilder, (void **)&pGraph);

			pBuilder->SetFiltergraph(pGraph);
			pGraph->QueryInterface(IID_IMediaControl,(void**)&pMediaControl);

			pGraph->RenderFile(strFile.AllocSysString(),NULL);

			//获取预览窗口
			pViewWnd= NULL;
			pGraph->QueryInterface(IID_IVideoWindow,(void**)&pViewWnd);
			
			if (pViewWnd)
			{
				//设置预览窗口的拥有者
				pViewWnd->put_Owner((long)m_Panel. m_hWnd);
				pViewWnd->put_Left(1);
				pViewWnd->put_Top(1);

				//获取预览窗口风格
				long style;
				pViewWnd->get_WindowStyle(&style);
				style = style & ~WS_CAPTION;
				style = style & ~WS_DLGFRAME;
				style = style & WS_CHILD;
				pViewWnd->put_WindowStyle(style);

				//设置预览窗口宽度和高度
				CRect rc;
				m_Panel.GetClientRect(rc);
				pViewWnd->put_Height(rc.Height());
				pViewWnd->put_Width(rc.Width());
			}
			m_hThread = NULL;
			pGraph->QueryInterface(IID_IMediaEventEx, (void **)&pEvent);
			m_Completed = FALSE;
			DWORD threadID;
			m_hThread =  CreateThread(NULL,0,ThreadProc,(void*)this,0,&threadID);
			pMediaControl->Run();
			m_Previewed = TRUE;
		}
	}
}

void CDirectShowEventDlg::OnCancel()
{
	if (m_hThread)
	{
		TerminateThread(m_hThread,0);
		m_hThread = NULL;
	}
	CDialog::OnCancel();
}

void CDirectShowEventDlg::Done(WPARAM wParam, LPARAM lParam)
{
	if (m_hThread)
	{
		TerminateThread(m_hThread,0);
		m_hThread = NULL;
	}

	m_Previewed = FALSE;
	pMediaControl->Stop();
	pMediaControl->Release();
	pGraph->Release();
	pViewWnd->put_Visible(FALSE);
	m_Panel.ShowWindow(SW_HIDE);
	m_Panel.ShowWindow(SW_SHOW);
	MessageBox("预览完成!","提示");
}