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

/////////////////////////////////////////////////////////////////////////////////////
// TuneRequestimpl.h : implementation helper template for component type interface
// Copyright (c) Microsoft Corporation 1999.

#ifndef TUNEREQUESTIMPL_H
#define TUNEREQUESTIMPL_H

#pragma once
#include <tuner.h>
#include <Components.h>

namespace BDATuningModel {

typedef CComQIPtr<ITuningSpace> PQTuningSpace;
typedef CComQIPtr<ILocator> PQLocator;

template<class T,
         class MostDerived = ITuneRequest, 
         LPCGUID iid = &__uuidof(MostDerived),
         LPCGUID LibID = &LIBID_TunerLib, 
         WORD wMajor = 1,
         WORD wMinor = 0, 
         class tihclass = CComTypeInfoHolder
        > class ATL_NO_VTABLE ITuneRequestImpl : 
    public IPersistPropertyBagImpl<T>,
	public IDispatchImpl<MostDerived, iid, LibID, wMajor, wMinor, tihclass>
{
// ITuneRequest
public:
	bool m_bRequiresSave;
	ITuneRequestImpl() : m_bRequiresSave(false) {
        m_Components = new CComObject<CComponents>;
    }
    virtual ~ITuneRequestImpl() {}
	// undone: the below map entry stores a copy of the tuning space contents instead of a 
	// reference to the tuning space.  This should be changed to store a tuning space moniker
    BEGIN_PROP_MAP(ITuneRequestImpl)
        PROP_DATA_QI_ENTRY("Tuning Space", m_TS.p, __uuidof(ITuningSpace))
        PROP_DATA_QI_ENTRY("Locator", m_Locator.p, __uuidof(ILocator))
    END_PROP_MAP()

	PQTuningSpace m_TS;
	PQComponents m_Components;
	PQLocator m_Locator;

	STDMETHOD(get_TuningSpace)(/* [out, retval] */ ITuningSpace **ppTS){ 
		try {
			if (!ppTS) {
				return E_POINTER;
			}
			ATL_LOCKT();
            if (!m_TS) {
                return E_UNEXPECTED;
            }
			return m_TS.CopyTo(ppTS);
		} catch (...) {
			return E_OUTOFMEMORY;
		}
    }
	STDMETHOD(get_Components)(/* [out, retval] */ IComponents **ppC){ 
		try {
			if (!ppC) {
				return E_POINTER;
			}
			ATL_LOCKT();
            if (!m_Components) {
                return E_UNEXPECTED;
            }
			return m_Components.CopyTo(ppC);
		} catch (...) {
			return E_OUTOFMEMORY;
		}
    }
	STDMETHOD(Clone) (ITuneRequest **ppTR) {
		try {
			if (!ppTR) {
				return E_POINTER;
			}
			ATL_LOCKT();
			T* pt = static_cast<T*>(new CComObject<T>);
			if (!pt) {
				return E_OUTOFMEMORY;
			}
            if (!m_TS) {
                // corrupt tune request.  we can't have a tunerequest without an
                // attached tuning space since the tuning space is the factory
                // and always sets this property to non-null at creation time.
                // the only way to get a NULL is for an unpersist from a corrupt store
                // or a bug in a tuning space's implementation.
                return E_UNEXPECTED;
            }
            ASSERT(!pt->m_TS);
			HRESULT hr = m_TS->Clone(&pt->m_TS);
			if (m_Components) {
                if (pt->m_Components) {
                    pt->m_Components.Release();
                }
                ASSERT(!pt->m_Components);
				hr = m_Components->Clone(&pt->m_Components);
				if (FAILED(hr)) {
					delete pt;
					return hr;
				}
			}
			if (m_Locator) {
                ASSERT(!pt->m_Locator);
				hr = m_Locator->Clone(&pt->m_Locator);
				if (FAILED(hr)) {
					delete pt;
					return hr;
				}
			}
			pt->m_bRequiresSave = true;
			pt->AddRef();
			*ppTR = pt;
			return NOERROR;
		} catch (HRESULT h) {
			return h;
		} catch (...) {
			return E_POINTER;
		}
	}
    STDMETHOD(get_Locator) (ILocator **ppLocator) {
		try {
			if (!ppLocator) {
				return E_POINTER;
			}
			ATL_LOCKT();
			return m_Locator.CopyTo(ppLocator);
		} catch (HRESULT h) {
			return h;
		} catch (...) {
			return E_POINTER;
		}
    };

    STDMETHOD(put_Locator) (ILocator *pLocator) {
		try {
			ATL_LOCKT();
            m_Locator = pLocator;
	        MARK_DIRTY(T);

			return NOERROR;
		} catch (HRESULT h) {
			return h;
		} catch (...) {
			return E_POINTER;
		}
    };

};

typedef CComQIPtr<ITuneRequest> PQTuneRequest;

}; // namespace

#endif // TUNEREQUESTIMPL_H
// end of file -- tunerequestimpl.h