src/filters/BaseClasses/amextra.h

   1 //------------------------------------------------------------------------------
   2 // File: AMExtra.h
   3 //
   4 // Desc: DirectShow base classes.
   5 //
   6 // Copyright (c) 1992-2002 Microsoft Corporation.  All rights reserved.
   7 //------------------------------------------------------------------------------
   8
   9
  10 #ifndef __AMEXTRA__
  11 #define __AMEXTRA__
  12
  13 // Simple rendered input pin
  14 //
  15 // NOTE if your filter queues stuff before rendering then it may not be
  16 // appropriate to use this class
  17 //
  18 // In that case queue the end of stream condition until the last sample
  19 // is actually rendered and flush the condition appropriately
  20
  21 class CRenderedInputPin : public CBaseInputPin
  22 {
  23 public:
  24
  25     CRenderedInputPin(TCHAR *pObjectName,
  26                       CBaseFilter *pFilter,
  27                       CCritSec *pLock,
  28                       HRESULT *phr,
  29                       LPCWSTR pName);
  30 #ifdef UNICODE
  31     CRenderedInputPin(CHAR *pObjectName,
  32                       CBaseFilter *pFilter,
  33                       CCritSec *pLock,
  34                       HRESULT *phr,
  35                       LPCWSTR pName);
  36 #endif
  37
  38     // Override methods to track end of stream state
  39     STDMETHODIMP EndOfStream();
  40     STDMETHODIMP EndFlush();
  41
  42     HRESULT Active();
  43     HRESULT Run(REFERENCE_TIME tStart);
  44
  45 protected:
  46
  47     // Member variables to track state
  48     BOOL m_bAtEndOfStream;      // Set by EndOfStream
  49     BOOL m_bCompleteNotified;   // Set when we notify for EC_COMPLETE
  50
  51 private:
  52     void DoCompleteHandling();
  53 };
  54
  55 #endif // __AMEXTRA__
  56