多媒体编程

开发平台：
Visual C++

GSCaptureDlg.cpp：源码内容
							/* 
 *	Copyright (C) 2003-2005 Gabest
 *	http://www.gabest.org
 *
 *  This Program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *   
 *  This Program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *   
 *  You should have received a copy of the GNU General Public License
 *  along with GNU Make; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 
 *  http://www.gnu.org/copyleft/gpl.html
 *
 */
// GSCaptureDlg.cpp : implementation file
//
#include "stdafx.h"
#include <afxpriv.h>
#include "GSCaptureDlg.h"
// GSCaptureDlg dialog
IMPLEMENT_DYNAMIC(GSCaptureDlg, CDialog)
GSCaptureDlg::GSCaptureDlg(CWnd* pParent /*=NULL*/)
	: CDialog(GSCaptureDlg::IDD, pParent)
{
	m_filename = AfxGetApp()->GetProfileString(_T("Capture"), _T("FileName"));
}
GSCaptureDlg::~GSCaptureDlg()
{
}
int GSCaptureDlg::GetSelCodec(Codec& c)
{
	int iSel = m_codeclist.GetCurSel();
	if(iSel < 0) return 0;
	POSITION pos = (POSITION)m_codeclist.GetItemDataPtr(iSel);
	if(pos == NULL) return 2;
	c = m_codecs.GetAt(pos);
	if(!c.pBF)
	{
		c.pMoniker->BindToObject(NULL, NULL, __uuidof(IBaseFilter), (void**)&c.pBF);
		if(!c.pBF) return 0;
	}
	return 1;
}
LRESULT GSCaptureDlg::DefWindowProc(UINT message, WPARAM wParam, LPARAM lParam)
{
	LRESULT ret = __super::DefWindowProc(message, wParam, lParam);
	if(message == WM_INITDIALOG) SendMessage(WM_KICKIDLE);
	return(ret);
}
void GSCaptureDlg::DoDataExchange(CDataExchange* pDX)
{
	__super::DoDataExchange(pDX);
	DDX_Text(pDX, IDC_EDIT1, m_filename);
	DDX_Control(pDX, IDC_COMBO1, m_codeclist);
}
BOOL GSCaptureDlg::OnInitDialog()
{
	__super::OnInitDialog();
	m_codecs.RemoveAll();
	m_codeclist.ResetContent();
	m_codeclist.SetItemDataPtr(m_codeclist.AddString(_T("Uncompressed")), NULL);
	BeginEnumSysDev(CLSID_VideoCompressorCategory, pMoniker)
	{
		Codec c;
		c.pMoniker = pMoniker;
		LPOLESTR strName = NULL;
		if(FAILED(pMoniker->GetDisplayName(NULL, NULL, &strName)))
			continue;
		c.DisplayName = strName;
		CoTaskMemFree(strName);
		CComPtr<IPropertyBag> pPB;
		pMoniker->BindToStorage(0, 0, IID_IPropertyBag, (void**)&pPB);
		CComVariant var;
		if(FAILED(pPB->Read(CComBSTR(_T("FriendlyName")), &var, NULL)))
			continue;
		
		c.FriendlyName = var.bstrVal;
		CStringW str = CStringW(c.DisplayName).MakeLower();
		if(str.Find(L"@device:dmo:") == 0)
			c.FriendlyName = _T("(DMO) ") + c.FriendlyName;
		else if(str.Find(L"@device:sw:") == 0)
			c.FriendlyName = _T("(DS) ") + c.FriendlyName;
		else if(str.Find(L"@device:cm:") == 0)
			c.FriendlyName = _T("(VfW) ") + c.FriendlyName;
		m_codeclist.SetItemDataPtr(m_codeclist.AddString(c.FriendlyName), m_codecs.AddTail(c));
	}
	EndEnumSysDev
	//
	CString DisplayNameToFind = AfxGetApp()->GetProfileString(_T("Capture"), _T("VideoCodecDisplayName"));
	for(int i = 0; i < m_codeclist.GetCount(); i++)
	{
		CString DisplayName;
		POSITION pos = (POSITION)m_codeclist.GetItemDataPtr(i);
		if(pos) DisplayName = m_codecs.GetAt(pos).DisplayName;
		if(DisplayName == DisplayNameToFind)
		{
			m_codeclist.SetCurSel(i);
			break;
		}
	}
	//
	UpdateData(FALSE);
	return TRUE;  // return TRUE unless you set the focus to a control
	// EXCEPTION: OCX Property Pages should return FALSE
}
BEGIN_MESSAGE_MAP(GSCaptureDlg, CDialog)
	ON_MESSAGE_VOID(WM_KICKIDLE, OnKickIdle)
	ON_BN_CLICKED(IDC_BUTTON1, OnBnClickedButton1)
	ON_BN_CLICKED(IDC_BUTTON2, OnBnClickedButton2)
	ON_UPDATE_COMMAND_UI(IDC_BUTTON2, OnUpdateButton2)
	ON_BN_CLICKED(IDOK, OnBnClickedOk)
	ON_UPDATE_COMMAND_UI(IDOK, OnUpdateOK)
END_MESSAGE_MAP()
// GSCaptureDlg message handlers
void GSCaptureDlg::OnKickIdle()
{
	UpdateDialogControls(this, false);
}
void GSCaptureDlg::OnBnClickedButton1()
{
	UpdateData();
	CFileDialog fd(FALSE, _T("avi"), m_filename, 
		OFN_EXPLORER|OFN_ENABLESIZING|OFN_HIDEREADONLY|OFN_OVERWRITEPROMPT|OFN_PATHMUSTEXIST, 
		_T("Avi files (*.avi)|*.avi||"), this, 0);
	if(fd.DoModal() == IDOK)
	{
		m_filename = fd.GetPathName();
		UpdateData(FALSE);
	}
}
void GSCaptureDlg::OnBnClickedButton2()
{
	Codec c;
	if(GetSelCodec(c) != 1) return;
	if(CComQIPtr<ISpecifyPropertyPages> pSPP = c.pBF)
	{
		CAUUID caGUID;
		caGUID.pElems = NULL;
		if(SUCCEEDED(pSPP->GetPages(&caGUID)))
		{
			IUnknown* lpUnk = NULL;
			pSPP.QueryInterface(&lpUnk);
			OleCreatePropertyFrame(
				m_hWnd, 0, 0, CStringW(c.FriendlyName), 
				1, (IUnknown**)&lpUnk, 
				caGUID.cElems, caGUID.pElems, 
				0, 0, NULL);
			lpUnk->Release();
			if(caGUID.pElems) CoTaskMemFree(caGUID.pElems);
		}
	}
	else if(CComQIPtr<IAMVfwCompressDialogs> pAMVfWCD = c.pBF)
	{
		if(pAMVfWCD->ShowDialog(VfwCompressDialog_QueryConfig, NULL) == S_OK)
			pAMVfWCD->ShowDialog(VfwCompressDialog_Config, m_hWnd);		
	}
}
void GSCaptureDlg::OnUpdateButton2(CCmdUI* pCmdUI)
{
	pCmdUI->Enable(m_codeclist.GetCurSel() >= 0 && m_codeclist.GetItemDataPtr(m_codeclist.GetCurSel()) != NULL);
}
void GSCaptureDlg::OnBnClickedOk()
{
	UpdateData();
	Codec c;
	if(GetSelCodec(c) == 0) return;
	m_pVidEnc = c.pBF;
	AfxGetApp()->WriteProfileString(_T("Capture"), _T("FileName"), m_filename);
	AfxGetApp()->WriteProfileString(_T("Capture"), _T("VideoCodecDisplayName"), CString(c.DisplayName));
	OnOK();
}
void GSCaptureDlg::OnUpdateOK(CCmdUI* pCmdUI)
{
	CString str;
	GetDlgItem(IDC_EDIT1)->GetWindowText(str);
	pCmdUI->Enable(!str.IsEmpty() && m_codeclist.GetCurSel() >= 0);
}

						