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The majority of classes in the DirectShow class library implement COM interfaces and can be categorized as follows:
- Filter base classes implement the IBaseFilterinterface, and include CBaseFilterand classes derived from it.
- Pin classes implement the IPininterface, and include CBasePinand derived classes.
- Enumerator classes include CEnumPinsand CEnumMediaTypes.
- Transport base classes include CMediaSample, CBaseAllocator, CMemAllocator, and their derived classes. These classes share memory between pins and pass media samples using that memory.
- Control and position classes include CBaseFilter, CMediaPosition, CMediaControl, CBaseMediaFilter, CSourceSeeking, and CBaseStreamControl.
- Clock base classes include
CBaseReferenceClockand
CSystemClock.
This topic contains the following subtopics.