mirror of
https://github.com/reactos/reactos.git
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169 lines
3.2 KiB
C++
169 lines
3.2 KiB
C++
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS Network Provider for MPEG2 based networks
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* FILE: dll/directx/msdvbnp/enumpins.cpp
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* PURPOSE: IEnumPins interface
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*
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* PROGRAMMERS: Johannes Anderwald (johannes.anderwald@reactos.org)
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*/
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#include "precomp.h"
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class CEnumPins : public IEnumPins
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{
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public:
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STDMETHODIMP QueryInterface( REFIID InterfaceId, PVOID* Interface);
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STDMETHODIMP_(ULONG) AddRef()
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{
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InterlockedIncrement(&m_Ref);
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return m_Ref;
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}
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STDMETHODIMP_(ULONG) Release()
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{
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InterlockedDecrement(&m_Ref);
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if (!m_Ref)
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{
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delete this;
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return 0;
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}
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return m_Ref;
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}
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HRESULT STDMETHODCALLTYPE Next(ULONG cPins, IPin **ppPins, ULONG *pcFetched);
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HRESULT STDMETHODCALLTYPE Skip(ULONG cPins);
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HRESULT STDMETHODCALLTYPE Reset();
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HRESULT STDMETHODCALLTYPE Clone(IEnumPins **ppEnum);
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CEnumPins(ULONG NumPins, IPin ** pins) : m_Ref(0), m_NumPins(NumPins), m_Pins(pins), m_Index(0){};
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virtual ~CEnumPins(){};
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protected:
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LONG m_Ref;
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ULONG m_NumPins;
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IPin ** m_Pins;
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ULONG m_Index;
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};
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HRESULT
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STDMETHODCALLTYPE
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CEnumPins::QueryInterface(
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IN REFIID refiid,
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OUT PVOID* Output)
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{
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if (IsEqualGUID(refiid, IID_IUnknown))
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{
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*Output = PVOID(this);
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reinterpret_cast<IUnknown*>(*Output)->AddRef();
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return NOERROR;
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}
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if (IsEqualGUID(refiid, IID_IEnumPins))
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{
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*Output = (IEnumPins*)(this);
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reinterpret_cast<IEnumPins*>(*Output)->AddRef();
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return NOERROR;
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}
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WCHAR Buffer[MAX_PATH];
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LPOLESTR lpstr;
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StringFromCLSID(refiid, &lpstr);
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swprintf(Buffer, L"CEnumPins::QueryInterface: NoInterface for %s\n", lpstr);
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OutputDebugStringW(Buffer);
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CoTaskMemFree(lpstr);
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return E_NOINTERFACE;
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}
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HRESULT
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STDMETHODCALLTYPE
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CEnumPins::Next(
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ULONG cPins,
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IPin **ppPins,
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ULONG *pcFetched)
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{
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ULONG i = 0;
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if (!ppPins)
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return E_POINTER;
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if (cPins > 1 && !pcFetched)
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return E_INVALIDARG;
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while(i < cPins)
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{
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if (m_Index + i >= m_NumPins)
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break;
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ppPins[i] = m_Pins[m_Index + i];
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m_Pins[m_Index + i]->AddRef();
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i++;
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}
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if (pcFetched)
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{
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*pcFetched = i;
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}
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m_Index += i;
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if (i < cPins)
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return S_FALSE;
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else
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return S_OK;
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}
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HRESULT
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STDMETHODCALLTYPE
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CEnumPins::Skip(
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ULONG cPins)
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{
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if (cPins + m_Index >= m_NumPins)
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{
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return S_FALSE;
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}
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m_Index += cPins;
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return S_OK;
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}
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HRESULT
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STDMETHODCALLTYPE
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CEnumPins::Reset()
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{
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m_Index = 0;
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return S_OK;
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}
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HRESULT
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STDMETHODCALLTYPE
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CEnumPins::Clone(
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IEnumPins **ppEnum)
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{
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OutputDebugStringW(L"CEnumPins::Clone : NotImplemented\n");
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return E_NOTIMPL;
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}
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HRESULT
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WINAPI
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CEnumPins_fnConstructor(
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IUnknown *pUnknown,
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ULONG NumPins,
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IPin ** pins,
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REFIID riid,
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LPVOID * ppv)
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{
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CEnumPins * handler = new CEnumPins(NumPins, pins);
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if (!handler)
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return E_OUTOFMEMORY;
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if (FAILED(handler->QueryInterface(riid, ppv)))
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{
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/* not supported */
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delete handler;
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return E_NOINTERFACE;
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}
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return NOERROR;
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} |