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CTransformOutputPin class

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[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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.]

ctransformoutputpin class hierarchy

The CTransformOutputPin class implements an output pin that is used by the CTransformFilter class.

Typically, you do not need to derive from this class. Most of the methods in this class call corresponding methods on the CTransformFilter class, which you can override. If you derive from this class, you must override the filter's CTransformFilter::GetPin method to create instances of your derived class.

This class exposes the IMediaSeeking and IMediaPosition interfaces through the CPosPassThru object. It passes all seek requests to the next filter upstream.

Protected Member Variables Description
m_pTransformFilter Pointer to the owning filter.
Public Member Variables Description
m_pPosition Helper object to pass seek commands upstream.
Public Methods Description
CTransformOutputPin Constructor method.
~CTransformOutputPin Destructor method.
CheckConnect Determines whether a pin connection is suitable.
BreakConnect Releases the pin from a connection.
CompleteConnect Completes a connection to another pin.
CheckMediaType Determines if the pin accepts a specific media type.
SetMediaType Sets the media type for the connection.
DecideBufferSize Sets the buffer requirements.
GetMediaType Retrieves a preferred media type, by index value.
CurrentMediaType Retrieves the media type for the current pin connection.
IPin Methods Description
QueryId Retrieves an identifier for the pin.
IQualityControl Methods Description
Notify Notifies the pin that a quality change is requested.

Requirements

Requirement Value
Header
Transfrm.h (include Streams.h)
Library
Strmbase.lib (retail builds);
Strmbasd.lib (debug builds)