75 lines
1.9 KiB
C++
75 lines
1.9 KiB
C++
//------------------------------------------------------------------------------
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// File: SysClock.cpp
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//
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// Desc: DirectShow base classes - implements a system clock based on
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// IReferenceClock.
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//
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// Copyright (c) 1992-2001 Microsoft Corporation. All rights reserved.
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//------------------------------------------------------------------------------
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#include <streams.h>
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#include <limits.h>
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#ifdef FILTER_DLL
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/* List of class IDs and creator functions for the class factory. This
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provides the link between the OLE entry point in the DLL and an object
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being created. The class factory will call the static CreateInstance
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function when it is asked to create a CLSID_SystemClock object */
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CFactoryTemplate g_Templates[1] = {
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{&CLSID_SystemClock, CSystemClock::CreateInstance}
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};
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int g_cTemplates = sizeof(g_Templates) / sizeof(g_Templates[0]);
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#endif
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/* This goes in the factory template table to create new instances */
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CUnknown * WINAPI CSystemClock::CreateInstance(LPUNKNOWN pUnk,HRESULT *phr)
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{
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return new CSystemClock(NAME("System reference clock"),pUnk, phr);
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}
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CSystemClock::CSystemClock(TCHAR *pName,LPUNKNOWN pUnk,HRESULT *phr) :
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CBaseReferenceClock(pName, pUnk, phr)
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{
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}
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STDMETHODIMP CSystemClock::NonDelegatingQueryInterface(
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REFIID riid,
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void ** ppv)
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{
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if (riid == IID_IPersist)
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{
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return GetInterface(static_cast<IPersist *>(this), ppv);
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}
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else if (riid == IID_IAMClockAdjust)
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{
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return GetInterface(static_cast<IAMClockAdjust *>(this), ppv);
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}
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else
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{
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return CBaseReferenceClock::NonDelegatingQueryInterface(riid, ppv);
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}
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}
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/* Return the clock's clsid */
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STDMETHODIMP
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CSystemClock::GetClassID(CLSID *pClsID)
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{
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CheckPointer(pClsID,E_POINTER);
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ValidateReadWritePtr(pClsID,sizeof(CLSID));
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*pClsID = CLSID_SystemClock;
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return NOERROR;
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}
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STDMETHODIMP
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CSystemClock::SetClockDelta(REFERENCE_TIME rtDelta)
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{
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return SetTimeDelta(rtDelta);
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}
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