CPullPin Class (Windows Embedded CE 6.0)

1/6/2010

This class is provided to allow a filter downstream from the source to create a thread and pull a media stream from an asynchronous source filter that supports the IAsyncReader interface.

Typically, this class is implemented on the input pin of a parser filter, because the DirectShow asynchronous reader filter just reads a media stream from a file and provides no parsing.

Protected Data Members

Member	Description
m_pAlloc	Pointer to the IMemAllocator interface used by the connection.

Member Functions

Member function	Description
Active	Instructs the pin to start pulling data from the asynchronous reader.
AlignDown	Aligns a LONGLONG value down to the next LONG boundary.
AlignUp	Aligns a LONGLONG value up to the next LONG boundary.
Connect	Initiates a connection from this pin to the asynchronous reader.
CPullPin	Constructs a CPullPin object.
Disconnect	Breaks a connection to the asynchronous reader.
Duration	Retrieves the total duration of the media stream.
GetReader	Retrieves the asynchronous reader interface.
Inactive	Instructs the pin to stop pulling data from the asynchronous reader.
Seek	Sets the start and stop times of the media stream.

Overrideable Member Functions

Member function	Description
BeginFlush	Flushes this pin and all downstream pins.
DecideAllocator	Proposes an allocator for use by the asynchronous reader.
EndFlush	Signals end of flushing operation.
EndOfStream	Sends end-of-stream notification downstream.
OnError	Handles run-time errors that caused pulling to stop.
Receive	Handles the arrival of data from the asynchronous reader.

Requirements

Windows Embedded CE	Windows CE 2.12 and later
Note	Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements For more information, see Setting Up the Build Environment

See Also

Reference

DirectShow Classes