osdwrapper.h

Windows CE 下的机顶盒应用实例

// If you did not accept the terms of the EULA, you are not authorized to use
// this source code. For a copy of the EULA, please see the LICENSE.RTF on your
// install media.
//
/*++
THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
PARTICULAR PURPOSE.

Module Name:  osdwrapper.h

Abstract:  Defines window.external.OSD (IOSDWrapper), which extends
		   the DHTML object model to provide OSD (on sceen display)
		   functionality to multimedia pages.

--*/

#ifndef _OSDWRAPPER_H_8B75F989_F5CA_47C9_9365_5EA1D90E3230_
#define _OSDWRAPPER_H_8B75F989_F5CA_47C9_9365_5EA1D90E3230_

#include <dshow.h>
#include "osdwin.h"

class COSDWrapper : 
	public CComObjectRoot,
	public IDispatchImpl<IOSDWrapper, &IID_IOSDWrapper, &LIBID_STBIHOSTLib>
{
	IDispatch* m_pdispWMP;
	IVideoWindow* m_pVideoWindow;
	CWinOSD* m_pOSD;

	void ResetInternalPointers();

public:

	DECLARE_NO_REGISTRY()
	DECLARE_NOT_AGGREGATABLE(COSDWrapper)
	DECLARE_PROTECT_FINAL_CONSTRUCT()

	BEGIN_CATEGORY_MAP(COSDWrapper)
	END_CATEGORY_MAP()

	BEGIN_COM_MAP(COSDWrapper)
		COM_INTERFACE_ENTRY(IOSDWrapper)
		COM_INTERFACE_ENTRY(IDispatch)
	END_COM_MAP()

	COSDWrapper() :
		m_pdispWMP(NULL),
		m_pVideoWindow(NULL),
		m_pOSD(NULL)
	{ }

	~COSDWrapper()
	{
		ResetInternalPointers();
	}

	// IOSDWrapper
	STDMETHOD(InitForMediaPlayer)(/*[in]*/ IDispatch* pVal);
	STDMETHOD(SignalOpenState)(/*[in]*/ VARIANT_BOOL fOpen);
	STDMETHOD(ProvideFeedback)(long cmd, long cmdResult);
};

#endif // _OSDWRAPPER_H_8B75F989_F5CA_47C9_9365_5EA1D90E3230_