windows-server-2003/multimedia/dshow/vidctl/ccimpl.h

//==========================================================================;
//
// closedcaptioningimpl.h : additional infrastructure to support implementing IMSVidClosedCaptionings
// nicely from c++
// Copyright (c) Microsoft Corporation 1999.
//
/////////////////////////////////////////////////////////////////////////////


#pragma once

#ifndef CLOSEDCAPTIONINGIMPL_H
#define CLOSEDCAPTIONINGIMPL_H

#include "featureimpl.h"

namespace MSVideoControl {

template<class T, LPCGUID LibID, LPCGUID KSCategory, class MostDerivedInterface = IMSVidClosedCaptioning>
    class DECLSPEC_NOVTABLE IMSVidClosedCaptioningImpl : public IMSVidFeatureImpl<T, LibID, KSCategory, MostDerivedInterface> {
public:

    IMSVidClosedCaptioningImpl() : m_fCCEnable(false) {}
    bool m_fCCEnable;

    STDMETHOD(put_Enable)(VARIANT_BOOL fEnable) {
        m_fCCEnable = (fEnable == VARIANT_TRUE);
		return NOERROR;
    }
    STDMETHOD(get_Enable)(VARIANT_BOOL *pfEnable) {
        if (!pfEnable) {
            return E_POINTER;
        }
        try {
            *pfEnable = m_fCCEnable ? VARIANT_TRUE : VARIANT_FALSE;
			return NOERROR;
        } catch(...) {
            return E_POINTER;
        }
	}
};

}; /// namespace

#endif
// end of file - closedcaptioningimpl.h