CBaseMediaFilter Class

Microsoft DirectShow 9.0

CBaseMediaFilter Class

The CBaseMediaFilter class implements the IMediaFilter interface. Use this class for plug-in distributors or other objects that need to support IMediaFilter without supporting the IBaseFilter interface. Do not use this class for filters. Instead, use the CBaseFilter class, or a base class derived from CBaseFilter.

Requirements

Header: Declared in Amfilter.h; include Streams.h.

Library: Use Strmbase.lib (retail builds) or Strmbasd.lib (debug builds).

Protected Member Variables
m_State	Current state of the object.
m_pClock	Pointer to the object's reference clock.
m_tStart	Reference time that corresponds to stream time 0.
m_clsid	Class identifier (CLSID) of the object.
m_pLock	Pointer to a critical section.
Public Methods
CBaseMediaFilter	Constructor method.
~CBaseMediaFilter	Destructor method. Virtual.
StreamTime	Retrieves the current stream time. Virtual.
IsActive	Determines whether the object is active (running or paused).
IPersist Methods
GetClassID	Retrieves the class identifier.
IMediaFilter Methods
GetState	Retrieves the object's state (running, stopped, or paused).
SetSyncSource	Sets a reference clock for the object.
GetSyncSource	Retrieves the reference clock that the object is using.
Stop	Stops the object.
Pause	Pauses the object.
Run	Runs the object.