videownd.cpp

VIS H.323 Library V2.1 Release

/*
  VIS H.323 Video Conference System
      --Sample for VIS H.323 DLL Library 2.1 Release

  For more information,visit our homepage 
  
    [http://www.115studio.com]

  or mail to us for tech support and bug report

    [[e-mail]]

  2000-2004 115Studio
  
  2004-04-05
*/
// VideoWnd.cpp : implementation file
//

#include "stdafx.h"
#include "VISConf.h"
#include "VideoWnd.h"

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


CVideoBuffer::CVideoBuffer()
{
	m_buf=NULL;
	m_w=0;
	m_h=0;
}

CVideoBuffer::~CVideoBuffer()
{
	CleanUpBuffer();
}

BYTE *CVideoBuffer::GetBuffer(int w,int h)
{
	m_mutex.Lock();
	void *ptr=NULL;
	if(w==0||(w==m_w&&h==m_h))
	{
		ptr=m_buf;
		goto RET;
	}
	if(m_buf)
	{
		ptr=HeapReAlloc(GetProcessHeap(),0,m_buf,w*h*3);		
		if(ptr==NULL)
		{
			HeapFree(GetProcessHeap(),0,m_buf);		
		}
	}
	else
	{
		ptr=HeapAlloc(GetProcessHeap(),0,w*h*3);
	}
	if(ptr==NULL)
		goto RET;
	
	m_buf=ptr;
	
	m_w=w;
	m_h=h;
	
	memset(m_buf,0,w*h*3);	

RET:
	if(!ptr)
		m_mutex.Unlock();
	return (BYTE*)ptr;
}

void CVideoBuffer::ReleaseBuffer()
{
	if(m_buf)
		m_mutex.Unlock();
}

void CVideoBuffer::CleanUpBuffer()
{
	m_mutex.Lock();
	if(m_buf)
	{
		HeapFree(GetProcessHeap(),0,m_buf);	
		m_buf=NULL;
		m_w=0;
		m_h=0;
	}
	m_mutex.Unlock();
}

/////////////////////////////////////////////////////////////////////////////
// CVideoWnd

CVideoWnd::CVideoWnd()
{	
	memset(&m_bmi,0,sizeof(m_bmi));
	m_bmi.bmiHeader.biSize=sizeof(BITMAPINFOHEADER);
	m_bmi.bmiHeader.biPlanes=1;	
	m_bmi.bmiHeader.biBitCount=24;
	m_bSizeChanged=FALSE;
}

CVideoWnd::~CVideoWnd()
{
	
}


BEGIN_MESSAGE_MAP(CVideoWnd, CWnd)
	//{{AFX_MSG_MAP(CVideoWnd)
	ON_WM_ERASEBKGND()
	ON_WM_LBUTTONDBLCLK()
	ON_WM_CLOSE()
	ON_WM_CREATE()
	ON_WM_DESTROY()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// CVideoWnd message handlers

BOOL CVideoWnd::OnEraseBkgnd(CDC* pDC) 
{
	BYTE *ptr=m_buffer.GetBuffer();
	if(ptr)
	{
		if(m_bSizeChanged)
		{
			m_bSizeChanged=FALSE;
			CRect rcWnd,rcClient;
			GetWindowRect(rcWnd); 
			GetClientRect(rcClient);
			//Make the client area fit video size
			SetWindowPos(0,0,0,m_bmi.bmiHeader.biWidth+rcWnd.Width()-rcClient.Width(),m_bmi.bmiHeader.biHeight+rcWnd.Height()-rcClient.Height(),SWP_NOMOVE);
		
		}
		else
		{
			CRect rc;
			GetClientRect(&rc);
			DrawDibDraw(m_hDrawDIB,pDC->GetSafeHdc(),0,0,rc.Width(),rc.Height(),&m_bmi.bmiHeader,ptr,0,0,m_bmi.bmiHeader.biWidth,m_bmi.bmiHeader.biHeight,DDF_NOTKEYFRAME);
			
		}
		m_buffer.ReleaseBuffer();
		return TRUE;
	}
	else
		return CWnd::OnEraseBkgnd(pDC);
}

BOOL CVideoWnd::Create(CWnd *pParentWnd, DWORD dwExStyle, LPCTSTR lpszWindowName, DWORD dwStyle, int x, int y, int nWidth, int nHeight)
{
	CString ClassName;
	ClassName=AfxRegisterWndClass(
			CS_VREDRAW | CS_HREDRAW|CS_DBLCLKS,
			::LoadCursor(NULL, IDC_ARROW),
			(HBRUSH) ::GetStockObject(BLACK_BRUSH),
			NULL);
    if(ClassName.IsEmpty())
		return FALSE;
	HWND parent=NULL;
	if(pParentWnd)
		parent=pParentWnd->m_hWnd;
	return CWnd::CreateEx(dwExStyle,ClassName,lpszWindowName,dwStyle,x,y,nWidth,nHeight,parent,NULL);

}

BYTE * CVideoWnd::GetBuffer(int w, int h)
{
	BYTE *ptr=NULL;
	if(m_hWnd&&IsWindowVisible())
	{
		ptr=m_buffer.GetBuffer(w,h);
		if(ptr)
		{
			
			if(w!=m_bmi.bmiHeader.biWidth||h!=m_bmi.bmiHeader.biHeight)
			{
				m_bmi.bmiHeader.biWidth=w;
				m_bmi.bmiHeader.biHeight=h;
				m_bSizeChanged=TRUE;
			}
			
			m_bmi.bmiHeader.biWidth=w;
			m_bmi.bmiHeader.biHeight=h;
			//We don't call ReleaseBuffer() here, and call it later
			
		}
	}
	return ptr;
	
}

BOOL CVideoWnd::ReleaseBuffer()
{
	m_buffer.ReleaseBuffer();
	if(m_hWnd)
		InvalidateRect(NULL);
	
	return TRUE;
}


void CVideoWnd::OnLButtonDblClk(UINT nFlags, CPoint point) 
{
	if(m_bmi.bmiHeader.biWidth>0)
	{
		CRect rcWnd,rcClient;
		GetWindowRect(rcWnd); 
		GetClientRect(rcClient);
		//make the client area fit video size
		SetWindowPos(0,0,0,m_bmi.bmiHeader.biWidth+rcWnd.Width()-rcClient.Width(),m_bmi.bmiHeader.biHeight+rcWnd.Height()-rcClient.Height(),SWP_NOMOVE);
	}
	CWnd::OnLButtonDblClk(nFlags, point);
}

void CVideoWnd::OnClose() 
{
	//Don't close and let parent close it
	CWnd *MainWnd=::AfxGetApp()->GetMainWnd();
	if(MainWnd)
		MainWnd->SendMessage(UM_CHILD_CLOSE,(WPARAM)m_hWnd,0);
	
}

int CVideoWnd::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CWnd::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	CRect rcWnd,rcClient;
	GetWindowRect(rcWnd); 
	GetClientRect(rcClient);
	//make the client rectangle fit video size
	SetWindowPos(0,0,0,176+rcWnd.Width()-rcClient.Width(),144+rcWnd.Height()-rcClient.Height(),SWP_NOMOVE);

	memset(&m_bmi,0,sizeof(m_bmi));
	m_bmi.bmiHeader.biSize=sizeof(BITMAPINFOHEADER);
	m_bmi.bmiHeader.biPlanes=1;	
	m_bmi.bmiHeader.biBitCount=24;

	m_hDrawDIB=DrawDibOpen();
	return 0;
}



void CVideoWnd::OnDestroy() 
{
	CWnd::OnDestroy();
	
	m_buffer.CleanUpBuffer();
	
	DrawDibClose(m_hDrawDIB);
}