Deriving from CBasePin

[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

To implement a pin using CBasePin, you must derive a new class from the base class and override several of its methods. You must override the following methods:

• CBasePin::CheckMediaType
• CBasePin::GetMediaType

You will probably need to override these additional methods:

• CBasePin::Active
• CBasePin::BreakConnect
• CBasePin::CheckConnect
• CBasePin::CompleteConnect
• CBasePin::EndOfStream
• CBasePin::Inactive
• CBasePin::Notify
• CBasePin::Run

Finally, you must implement the IPin::BeginFlush and IPin::EndFlush methods.

Some of these methods are implemented in base classes that derive from CBasePin, such as CBaseInputPin and CBaseOutputPin.

Related topics

CBasePin