85 lines
2.2 KiB
C
85 lines
2.2 KiB
C
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//==========================================================================;
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//
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// compimpl.h : additional infrastructure to support implementing IMSVidCompositionSegment
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// nicely from c++
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// Copyright (c) Microsoft Corporation 1999.
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//
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/////////////////////////////////////////////////////////////////////////////
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#pragma once
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#ifndef COMPIMPL_H
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#define COMPIMPL_H
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#include <segimpl.h>
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namespace MSVideoControl {
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typedef CComQIPtr<IMSVidCompositionSegment, &__uuidof(IMSVidCompositionSegment)> PQCompositionSegment;
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template<class T, class DerivedMost = IMSVidCompositionSegment> class DECLSPEC_NOVTABLE IMSVidCompositionSegmentImpl :
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public IMSVidGraphSegmentImpl<T, MSVidSEG_XFORM, &GUID_NULL, DerivedMost> {
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public:
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bool m_fComposed;
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VWSegmentList m_Segments;
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VWSegmentList::iterator m_pUp;
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VWSegmentList::iterator m_pDown;
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IMSVidCompositionSegmentImpl() :
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m_fComposed(false),
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m_Segments(VWSegmentList()),
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m_pUp(m_Segments.end()),
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m_pDown(m_Segments.end())
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{}
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virtual ~IMSVidCompositionSegmentImpl() {
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m_fComposed = false;
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}
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STDMETHOD(GetClassID) (LPCLSID guid) {
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try {
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memcpy(guid, &__uuidof(T), sizeof(CLSID));
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return NOERROR;
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} catch(...) {
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return E_POINTER;
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}
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}
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STDMETHOD(get_Up)(IMSVidGraphSegment **upstream)
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{
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if (!m_fComposed) {
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return ImplReportError(__uuidof(T), IDS_OBJ_NO_INIT, __uuidof(IMSVidCompositionSegment), CO_E_NOTINITIALIZED);
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}
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ASSERT(m_pGraph);
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try {
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return (*m_pUp).CopyTo(upstream);
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} catch (ComException &e) {
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return e;
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} catch (...) {
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return E_UNEXPECTED;
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}
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return NOERROR;
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}
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STDMETHOD(get_Down)(IMSVidGraphSegment **downstream)
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{
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if (!m_fComposed) {
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return ImplReportError(__uuidof(T), IDS_OBJ_NO_INIT, __uuidof(IMSVidCompositionSegment), CO_E_NOTINITIALIZED);
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}
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ASSERT(m_pGraph);
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try {
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return (*m_pDown).CopyTo(downstream);
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} catch (ComException &e) {
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return e;
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} catch (...) {
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return E_UNEXPECTED;
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}
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return NOERROR;
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}
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};
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}; // namespace
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#endif
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// end of file compimpl.h
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