IMemInputPin::ReceiveCanBlock

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Determines if the implementation of the IMemInputPin::Receivemethod might block on the connected output pin.

HRESULT ReceiveCanBlock(void);

Return Values

Can return any HRESULTvalue. The following specific success values can be returned.

S_FALSE	Input pin will not block on a Receivemethod.
S_OK	Input pin might block on a Receivemethod.

Remarks

An output pin from a filter might require notification if its thread might be blocked when it calls the Receivemethod on the connected input pin. For example, a source filter might prefer to keep reading and buffering data rather than to be blocked, and may choose to start another thread to wait on the blocking Receivemethod.

If your implementation of Receivecalls a downstream filter's Receivemethod on the same thread, the application will block if that filter blocks, and this method must indicate that.