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C/C++ Source or Header  |  2001-10-08  |  3.0 KB  |  112 lines
  1. //------------------------------------------------------------------------------
  2. // File: AMExtra.cpp
  3. //
  4. // Desc: DirectShow base classes - implements CRenderedInputPin class.
  5. //
  6. // Copyright (c) 1992-2001 Microsoft Corporation.  All rights reserved.
  7. //------------------------------------------------------------------------------
  8.  
  9.  
  10. #include <streams.h>        // DirectShow base class definitions
  11. #include <mmsystem.h>       // Needed for definition of timeGetTime
  12. #include <limits.h>         // Standard data type limit definitions
  13. #include <measure.h>        // Used for time critical log functions
  14.  
  15. #include "amextra.h"
  16.  
  17. #pragma warning(disable:4355)
  18.  
  19. //  Implements CRenderedInputPin class
  20.  
  21. CRenderedInputPin::CRenderedInputPin(TCHAR *pObjectName,
  22.                                      CBaseFilter *pFilter,
  23.                                      CCritSec *pLock,
  24.                                      HRESULT *phr,
  25.                                      LPCWSTR pName) :
  26.     CBaseInputPin(pObjectName, pFilter, pLock, phr, pName),
  27.     m_bAtEndOfStream(FALSE),
  28.     m_bCompleteNotified(FALSE)
  29. {
  30. }
  31. #ifdef UNICODE
  32. CRenderedInputPin::CRenderedInputPin(CHAR *pObjectName,
  33.                                      CBaseFilter *pFilter,
  34.                                      CCritSec *pLock,
  35.                                      HRESULT *phr,
  36.                                      LPCWSTR pName) :
  37.     CBaseInputPin(pObjectName, pFilter, pLock, phr, pName),
  38.     m_bAtEndOfStream(FALSE),
  39.     m_bCompleteNotified(FALSE)
  40. {
  41. }
  42. #endif
  43.  
  44. // Flush end of stream condition - caller should do any
  45. // necessary stream level locking before calling this
  46.  
  47. STDMETHODIMP CRenderedInputPin::EndOfStream()
  48. {
  49.     HRESULT hr = CheckStreaming();
  50.  
  51.     //  Do EC_COMPLETE handling for rendered pins
  52.     if (S_OK == hr  && !m_bAtEndOfStream) {
  53.         m_bAtEndOfStream = TRUE;
  54.         FILTER_STATE fs;
  55.         EXECUTE_ASSERT(SUCCEEDED(m_pFilter->GetState(0, &fs)));
  56.         if (fs == State_Running) {
  57.             DoCompleteHandling();
  58.         }
  59.     }
  60.     return hr;
  61. }
  62.  
  63.  
  64. // Called to complete the flush
  65.  
  66. STDMETHODIMP CRenderedInputPin::EndFlush()
  67. {
  68.     CAutoLock lck(m_pLock);
  69.  
  70.     // Clean up renderer state
  71.     m_bAtEndOfStream = FALSE;
  72.     m_bCompleteNotified = FALSE;
  73.  
  74.     return CBaseInputPin::EndFlush();
  75. }
  76.  
  77.  
  78. // Notify of Run() from filter
  79.  
  80. HRESULT CRenderedInputPin::Run(REFERENCE_TIME tStart)
  81. {
  82.     UNREFERENCED_PARAMETER(tStart);
  83.     m_bCompleteNotified = FALSE;
  84.     if (m_bAtEndOfStream) {
  85.         DoCompleteHandling();
  86.     }
  87.     return S_OK;
  88. }
  89.  
  90.  
  91. //  Clear status on going into paused state
  92.  
  93. HRESULT CRenderedInputPin::Active()
  94. {
  95.     m_bAtEndOfStream = FALSE;
  96.     m_bCompleteNotified = FALSE;
  97.     return CBaseInputPin::Active();
  98. }
  99.  
  100.  
  101. //  Do stuff to deliver end of stream
  102.  
  103. void CRenderedInputPin::DoCompleteHandling()
  104. {
  105.     ASSERT(m_bAtEndOfStream);
  106.     if (!m_bCompleteNotified) {
  107.         m_bCompleteNotified = TRUE;
  108.         m_pFilter->NotifyEvent(EC_COMPLETE, S_OK, (LONG_PTR)(IBaseFilter *)m_pFilter);
  109.     }
  110. }
  111.  
  112.