CTransformInputPin::Receive

  • Articolo
 
Microsoft DirectShow 9.0

CTransformInputPin::Receive

The Receive method receives the next media sample in the stream. This method implements the IMemInputPin::Receive method.

Syntax

  HRESULT Receive(
    IMediaSample *pSample
);

Parameters

pSample

Pointer to the sample's IMediaSample interface.

Return Value

Returns an HRESULT value. Possible values include those shown in the following table.

Value Description
S_FALSE Pin is currently flushing; sample was rejected.
S_OK Success.

Remarks

This method calls the pin's CBaseInputPin::Receive method, which checks the pin's streaming state and checks for format changes in the media type. Then it calls the filter's CTransformFilter::Receive method, which processes the sample and delivers it downstream.

If the filter needs to access the sample after this method returns, it should hold a reference count by calling the IUnknown::AddRef method on the sample. For example, some decoder filters need the current sample in order to decode the next sample.

Requirements

**  Header:** Declared in Transfrm.h; include Streams.h.

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

See Also

CTransformInputPin Class