107 lines
3.6 KiB
C
107 lines
3.6 KiB
C
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//==========================================================================;
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//
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// Composition.h : Declaration of the CComposition class
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// Copyright (c) Microsoft Corporation 1999.
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//
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/////////////////////////////////////////////////////////////////////////////
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#ifndef __COMPOSITION_H_
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#define __COMPOSITION_H_
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#include <winerror.h>
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#include <algorithm>
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#include <objectwithsiteimplsec.h>
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#include <compimpl.h>
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#include <seg.h>
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#include "resource.h" // main symbols
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/////////////////////////////////////////////////////////////////////////////
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// CComposition
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class ATL_NO_VTABLE __declspec(uuid("2764BCE5-CC39-11D2-B639-00C04F79498E")) CComposition :
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public CComObjectRootEx<CComMultiThreadModel>,
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public CComCoClass<CComposition, &__uuidof(CComposition)>,
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public IObjectWithSiteImplSec<CComposition>,
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public IMSVidCompositionSegmentImpl<CComposition>
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{
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public:
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CComposition() {}
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virtual ~CComposition() {}
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REGISTER_NONAUTOMATION_OBJECT_WITH_TM(IDS_PROJNAME,
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IDS_REG_COMPOSITION_DESC,
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LIBID_MSVidCtlLib,
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__uuidof(CComposition), tvBoth);
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DECLARE_PROTECT_FINAL_CONSTRUCT()
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BEGIN_COM_MAP(CComposition)
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COM_INTERFACE_ENTRY(IMSVidCompositionSegment)
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COM_INTERFACE_ENTRY(IMSVidGraphSegment)
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COM_INTERFACE_ENTRY(IPersist)
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COM_INTERFACE_ENTRY(IObjectWithSite)
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END_COM_MAP_WITH_FTM()
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// IMSVidComposition
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public:
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// IMSVidGraphSegment
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// IMSVidCompositionSegment
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STDMETHOD(Compose)(IMSVidGraphSegment * upstream, IMSVidGraphSegment * downstream)
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{
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if (m_fComposed) {
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return NOERROR;
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}
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ASSERT(m_pGraph);
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try {
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VWGraphSegment up(upstream);
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ASSERT(up.Graph() == m_pGraph);
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VWGraphSegment down(downstream);
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ASSERT(down.Graph() == m_pGraph);
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if (upstream == downstream) {
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return Error(IDS_CANT_COMPOSE_WITH_SELF, __uuidof(IMSVidCompositionSegment), E_INVALIDARG);
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}
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if (up.begin() == up.end()) {
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TRACELM(TRACE_ERROR, "CComposition::Compose() can't compose empty up segment");
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return NOERROR;
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}
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if (down.begin() == down.end()) {
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TRACELM(TRACE_ERROR, "CComposition::Compose() can't compose empty down segment");
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// this is not an error, for example, CA is an empty segment.
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return NOERROR;
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}
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for (VWGraphSegment::iterator iStart = up.begin(); iStart != up.end(); ++iStart) {
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ASSERT((*iStart).GetGraph() == m_pGraph);
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for (VWGraphSegment::iterator iStop = down.begin(); iStop != down.end(); ++ iStop) {
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ASSERT((*iStop).GetGraph() == m_pGraph);
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DSFilter pStart(*iStart);
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DSFilter pStop(*iStop);
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HRESULT hr = m_pGraph.Connect(pStart, pStop, m_Filters);
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if (SUCCEEDED(hr)) {
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m_Segments.push_back(up);
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m_Segments.push_back(down);
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m_pDown = m_Segments.end();
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--m_pDown;
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m_pUp = m_pDown;
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--m_pUp;
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m_fComposed = true;
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return NOERROR;
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}
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}
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}
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TRACELM(TRACE_ERROR, "CComposition::Compose() compose didn't connect anything");
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// return Error(IDS_CANT_COMPOSE, __uuidof(IMSVidCompositionSegment), E_FAIL);
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// bda tuner input doesn't compose with anything in CC. rather, line 21 decoder is
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// picked up when bda tuner is connected with video renderer.
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// But we do need to know that some cases fail such as dvd to vmr
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// so in those cases we return s_false
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return S_FALSE;
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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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}
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};
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#endif //__COMPOSITION_H_
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