CBasePin class

CBasePin Class Hierarchy

The CBasePin class is an abstract class that implements a generic pin.

The following topics describe how to use this class:

Protected Member VariablesDescription
m_pName Pin name.
m_Connected Pointer to the pin that is connected to this pin.
m_dir Direction of the pin.
m_pLock Pointer to a critical section object.
m_bRunTimeError Flag that indicates whether a run-time error has occurred.
m_bCanReconnectWhenActive Flag that indicates whether the pin supports dynamic reconnection.
m_bTryMyTypesFirst Flag that indicates whether the pin tries its own preferred media types before those of the receiving pin.
m_pFilter Pointer to the filter that created the pin.
m_pQSink Pointer to the object that handles quality messages.
m_TypeVersion Current version of the set of preferred media types.
m_mt Media type for the current pin connection.
m_tStart Segment start time.
m_tStop Segment stop time.
m_dRate Segment rate.
Protected Methods Description
DisplayPinInfo Traces a pin connection during debugging.
DisplayTypeInfo Displays media type information during debugging.
AttemptConnection Connects to another pin using a specified media type.
TryMediaTypes Given a list of media types, tries to complete a connection using one of those types.
AgreeMediaType Searches for a media type to make a pin connection.
DisconnectInternal Breaks the current pin connection.
Public MethodsDescription
CBasePin Constructor method.
~ CBasePin Destructor method. Virtual.
IsConnected Determines whether the pin is connected to another pin.
GetConnected Retrieves the pin that is connected to this pin.
IsStopped Determines whether the filter containing this pin is stopped.
GetMediaTypeVersion Retrieves a version number for the set of preferred media types. Virtual.
IncrementTypeVersion Increments the version number on the set of preferred media types.
Active Notifies the pin that the filter is now active. Virtual.
Inactive Notifies the pin that the filter is no longer active. Virtual.
Run Notifies the pin that the filter is now running. Virtual.
SetMediaType Sets the media type for the connection. Virtual.
CheckConnect Determines whether a pin connection is suitable. Virtual.
BreakConnect Releases the pin from a connection. Virtual.
CompleteConnect Completes a connection to another pin. Virtual.
GetMediaType Retrieves a preferred media type, by index value. Virtual.
CurrentStopTime Retrieves the segment stop time.
CurrentStartTime Retrieves the segment start time.
CurrentRate Retrieves the segment rate.
Name Retrieves the pin identifier.
SetReconnectWhenActive Specifies whether the pin supports dynamic reconnections.
CanReconnectWhenActive Queries whether the pin supports dynamic reconnections.
Pure Virtual Methods Description
CheckMediaType Determines if the pin accepts a specific media type.
IPin Methods Description
Connect Connects the pin to another pin.
ReceiveConnection Accepts a connection from another pin.
Disconnect Breaks the current pin connection.
ConnectedTo Retrieves the pin connected to this pin.
ConnectionMediaType Retrieves the media type for the current pin connection, if any.
QueryPinInfo Retrieves information about the pin.
QueryDirection Retrieves the direction of the pin (input or output).
QueryId Retrieves the pin identifier.
QueryAccept Determines whether the pin accepts a specified media type.
EnumMediaTypes Enumerates the pin's preferred media types.
QueryInternalConnections Retrieves the pins that are connected internally to this pin (within the filter).
EndOfStream Notifies the pin that no additional data is expected.
NewSegment Notifies the pin that media samples received after this call are grouped as a segment.
IQualityControl Methods Description
Notify Notifies the pin that a quality change is requested.
SetSink Sets an external quality manager.

 

Requirements

Header

Amfilter.h (include Streams.h)

Library

Strmbase.lib (retail builds);
Strmbasd.lib (debug builds)

 

 

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