diff options
Diffstat (limited to 'branches/1.0/thirdparties/win32/include/directshow/strmctl.h')
| -rw-r--r-- | branches/1.0/thirdparties/win32/include/directshow/strmctl.h | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/branches/1.0/thirdparties/win32/include/directshow/strmctl.h b/branches/1.0/thirdparties/win32/include/directshow/strmctl.h deleted file mode 100644 index 2a1475f..0000000 --- a/branches/1.0/thirdparties/win32/include/directshow/strmctl.h +++ /dev/null @@ -1,157 +0,0 @@ -//------------------------------------------------------------------------------
-// File: StrmCtl.h
-//
-// Desc: DirectShow base classes.
-//
-// Copyright (c) Microsoft Corporation. All rights reserved.
-//------------------------------------------------------------------------------
-
-
-#ifndef __strmctl_h__
-#define __strmctl_h__
-
-class CBaseStreamControl : public IAMStreamControl
-{
-public:
- // Used by the implementation
- enum StreamControlState
- { STREAM_FLOWING = 0x1000,
- STREAM_DISCARDING
- };
-
-private:
- enum StreamControlState m_StreamState; // Current stream state
- enum StreamControlState m_StreamStateOnStop; // State after next stop
- // (i.e.Blocking or Discarding)
-
- REFERENCE_TIME m_tStartTime; // MAX_TIME implies none
- REFERENCE_TIME m_tStopTime; // MAX_TIME implies none
- DWORD m_dwStartCookie; // Cookie for notification to app
- DWORD m_dwStopCookie; // Cookie for notification to app
- volatile BOOL m_bIsFlushing; // No optimization pls!
- volatile BOOL m_bStopSendExtra; // bSendExtra was set
- volatile BOOL m_bStopExtraSent; // the extra one was sent
-
- CCritSec m_CritSec; // CritSec to guard above attributes
-
- // Event to fire when we can come
- // out of blocking, or to come out of waiting
- // to discard if we change our minds.
- //
- CAMEvent m_StreamEvent;
-
- // All of these methods execute immediately. Helpers for others.
- //
- void ExecuteStop();
- void ExecuteStart();
- void CancelStop();
- void CancelStart();
-
- // Some things we need to be told by our owning filter
- // Your pin must also expose IAMStreamControl when QI'd for it!
- //
- IReferenceClock * m_pRefClock; // Need it to set advises
- // Filter must tell us via
- // SetSyncSource
- IMediaEventSink * m_pSink; // Event sink
- // Filter must tell us after it
- // creates it in JoinFilterGraph()
- FILTER_STATE m_FilterState; // Just need it!
- // Filter must tell us via
- // NotifyFilterState
- REFERENCE_TIME m_tRunStart; // Per the Run call to the filter
-
- // This guy will return one of the three StreamControlState's. Here's what
- // the caller should do for each one:
- //
- // STREAM_FLOWING: Proceed as usual (render or pass the sample on)
- // STREAM_DISCARDING: Calculate the time 'til *pSampleStop and wait
- // that long for the event handle
- // (GetStreamEventHandle()). If the wait
- // expires, throw the sample away. If the event
- // fires, call me back - I've changed my mind.
- //
- enum StreamControlState CheckSampleTimes( const REFERENCE_TIME * pSampleStart,
- const REFERENCE_TIME * pSampleStop );
-
-public:
- // You don't have to tell us much when we're created, but there are other
- // obligations that must be met. See SetSyncSource & NotifyFilterState
- // below.
- //
- CBaseStreamControl();
- ~CBaseStreamControl();
-
- // If you want this class to work properly, there are thing you need to
- // (keep) telling it. Filters with pins that use this class
- // should ensure that they pass through to this method any calls they
- // receive on their SetSyncSource.
-
- // We need a clock to see what time it is. This is for the
- // "discard in a timely fashion" logic. If we discard everything as
- // quick as possible, a whole 60 minute file could get discarded in the
- // first 10 seconds, and if somebody wants to turn streaming on at 30
- // minutes into the file, and they make the call more than a few seconds
- // after the graph is run, it may be too late!
- // So we hold every sample until it's time has gone, then we discard it.
- // The filter should call this when it gets a SetSyncSource
- //
- void SetSyncSource( IReferenceClock * pRefClock )
- {
- CAutoLock lck(&m_CritSec);
- if (m_pRefClock) m_pRefClock->Release();
- m_pRefClock = pRefClock;
- if (m_pRefClock) m_pRefClock->AddRef();
- }
-
- // Set event sink for notifications
- // The filter should call this in its JoinFilterGraph after it creates the
- // IMediaEventSink
- //
- void SetFilterGraph( IMediaEventSink *pSink ) {
- m_pSink = pSink;
- }
-
- // Since we schedule in stream time, we need the tStart and must track the
- // state of our owning filter.
- // The app should call this ever state change
- //
- void NotifyFilterState( FILTER_STATE new_state, REFERENCE_TIME tStart = 0 );
-
- // Filter should call Flushing(TRUE) in BeginFlush,
- // and Flushing(FALSE) in EndFlush.
- //
- void Flushing( BOOL bInProgress );
-
-
- // The two main methods of IAMStreamControl
-
- // Class adds default values suitable for immediate
- // muting and unmuting of the stream.
-
- STDMETHODIMP StopAt( const REFERENCE_TIME * ptStop = NULL,
- BOOL bSendExtra = FALSE,
- DWORD dwCookie = 0 );
- STDMETHODIMP StartAt( const REFERENCE_TIME * ptStart = NULL,
- DWORD dwCookie = 0 );
- STDMETHODIMP GetInfo( AM_STREAM_INFO *pInfo);
-
- // Helper function for pin's receive method. Call this with
- // the sample and we'll tell you what to do with it. We'll do a
- // WaitForSingleObject within this call if one is required. This is
- // a "What should I do with this sample?" kind of call. We'll tell the
- // caller to either flow it or discard it.
- // If pSample is NULL we evaluate based on the current state
- // settings
- enum StreamControlState CheckStreamState( IMediaSample * pSample );
-
-private:
- // These don't require locking, but we are relying on the fact that
- // m_StreamState can be retrieved with integrity, and is a snap shot that
- // may have just been, or may be just about to be, changed.
- HANDLE GetStreamEventHandle() const { return m_StreamEvent; }
- enum StreamControlState GetStreamState() const { return m_StreamState; }
- BOOL IsStreaming() const { return m_StreamState == STREAM_FLOWING; }
-};
-
-#endif
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