Important:
This is retired content. This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist.
A version of this page is also available for
4/8/2010

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 IAsyncReaderinterface.

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 IMemAllocatorinterface used by the connection.

Member Functions

Member function Description

Active

Instructs the pin to start pulling data from the asynchronous reader.

AlignDown

Aligns a LONGLONGvalue down to the next LONGboundary.

AlignUp

Aligns a LONGLONGvalue up to the next LONGboundary.

Connect

Initiates a connection from this pin to the asynchronous reader.

CPullPin

Constructs a CPullPinobject.

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
Windows Mobile Windows Mobile Version 5.0 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