CBaseInputPin method begins a flush operation. This method implements the IPin::BeginFlush method.
This method has no parameters.
The derived class must override this method and perform the following steps:
- Call the IPin::BeginFlush method on downstream input pins. If the pin has not yet delivered any media samples downstream, you can skip this step. If your output pins derive from the CBaseOutputPin class, you can call the CBaseOutputPin::DeliverBeginFlush method.
- Call the base class method.
- Begin discarding queued data.
- Return from any blocked calls to the Receive method.