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118 lines
3.9 KiB
118 lines
3.9 KiB
//==========================================================================;
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//
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// Composition.h : Declaration of the custom composition class for gluing mpeg2
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// decoder to closed caption
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// Copyright (c) Microsoft Corporation 1999.
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//
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/////////////////////////////////////////////////////////////////////////////
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#ifndef MP2CCCOMP_H
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#define MP2CCCOMP_H
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#pragma once
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#include <winerror.h>
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#include <algorithm>
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#include <compimpl.h>
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#include <seg.h>
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#include <objectwithsiteimplsec.h>
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#include "resource.h" // main symbols
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/////////////////////////////////////////////////////////////////////////////
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// CMP2CCComp
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class ATL_NO_VTABLE __declspec(uuid("6AD28EE1-5002-4e71-AAF7-BD077907B1A4")) CMP2CCComp :
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public CComObjectRootEx<CComSingleThreadModel>,
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public CComCoClass<CMP2CCComp, &__uuidof(CMP2CCComp)>,
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public IObjectWithSiteImplSec<CMP2CCComp>,
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public IMSVidCompositionSegmentImpl<CMP2CCComp>
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{
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public:
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CMP2CCComp() {}
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virtual ~CMP2CCComp() {}
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REGISTER_NONAUTOMATION_OBJECT(IDS_PROJNAME,
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IDS_REG_MP2CCCOMP_DESC,
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LIBID_MSVidCtlLib,
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__uuidof(CMP2CCComp));
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DECLARE_PROTECT_FINAL_CONSTRUCT()
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BEGIN_COM_MAP(CMP2CCComp)
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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()
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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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TRACELM(TRACE_DEBUG, "CMP2CCComp::Compose()");
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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 (up.begin() == up.end()) {
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TRACELM(TRACE_ERROR, "CMP2CCComp::Compose() can't compose empty up segment");
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return E_INVALIDARG;
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}
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if (down.begin() == down.end()) {
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TRACELM(TRACE_ERROR, "CMP2CCComp::Compose() can't compose empty down segment");
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return E_INVALIDARG;
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}
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#if 0
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VWGraphSegment::iterator iMP2 = std::find_if(up.begin(),
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up.end(),
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arity1_pointer(&IsMP2Demux));
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#endif
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VWGraphSegment::iterator iMP2;
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int i;
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for (i = 0 , iMP2 = up.begin(); iMP2 != up.end(); ++iMP2, ++i);
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for (iMP2 = up.begin(); iMP2 != up.end() && --i; ++iMP2);
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if (iMP2 == up.end()) {
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TRACELM(TRACE_ERROR, "CMP2CCComp::Compose() upstream segment has no MPEG2 Decoder");
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return E_FAIL;
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}
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ASSERT((*iMP2).GetGraph() == m_pGraph);
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VWGraphSegment::iterator iL21 = std::find_if(down.begin(),
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down.end(),
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arity1_pointer(&IsL21Decoder));
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if (iL21 == down.end()) {
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TRACELM(TRACE_ERROR, "CMP2CCComp::Compose() downstream segment has no l21Decoder");
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return E_FAIL;
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}
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ASSERT((*iL21).GetGraph() == m_pGraph);
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DSFilter pMP2(*iMP2);
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DSFilter pL21(*iL21);
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HRESULT hr = m_pGraph.Connect(pMP2, pL21, m_Filters, DSGraph::RENDER_ALL_PINS, DOWNSTREAM);
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if (FAILED(hr)) {
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TRACELSM(TRACE_ERROR, (dbgDump << "CMP2CCComp::Compose() FAILED connect hr = " << hexdump(hr)), "");
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return hr;
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}
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m_fComposed = true;
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return NOERROR;
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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 // MP2CCCOMP_H
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// end of file - MP2CCComp.h
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