src/filters/BaseClasses/sysclock.h

   1 //------------------------------------------------------------------------------
   2 // File: SysClock.h
   3 //
   4 // Desc: DirectShow base classes - defines a system clock implementation of
   5 //       IReferenceClock.
   6 //
   7 // Copyright (c) 1992-2002 Microsoft Corporation.  All rights reserved.
   8 //------------------------------------------------------------------------------
   9
  10
  11 #ifndef __SYSTEMCLOCK__
  12 #define __SYSTEMCLOCK__
  13
  14 //
  15 // Base clock.  Uses timeGetTime ONLY
  16 // Uses most of the code in the base reference clock.
  17 // Provides GetTime
  18 //
  19
  20 class CSystemClock : public CBaseReferenceClock, public IAMClockAdjust, public IPersist
  21 {
  22 public:
  23     // We must be able to create an instance of ourselves
  24     static CUnknown * WINAPI CreateInstance(LPUNKNOWN pUnk, HRESULT *phr);
  25     CSystemClock(TCHAR *pName, LPUNKNOWN pUnk, HRESULT *phr);
  26
  27     DECLARE_IUNKNOWN
  28
  29     STDMETHODIMP NonDelegatingQueryInterface(REFIID riid,void ** ppv);
  30
  31     // Yield up our class id so that we can be persisted
  32     // Implement required Ipersist method
  33     STDMETHODIMP GetClassID(CLSID *pClsID);
  34
  35     //  IAMClockAdjust methods
  36     STDMETHODIMP SetClockDelta(REFERENCE_TIME rtDelta);
  37 }; //CSystemClock
  38
  39 #endif /* __SYSTEMCLOCK__ */