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Ball Filter Sample

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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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

Description

The Ball Filter is a video source filter that produces an image of a bouncing ball. This sample illustrates format negotiation and the use of the source filter base classes CSource and CSourceStream.

The code in Fball.h and Fball.cpp manages the filter interfaces. Those two files contain approximately the minimum code required for a source filter. The Ball.h and Ball.cpp files contain the code that bounces the ball.

This filter has a single output pin, which provides a video stream that shows a ball bouncing around in the frame. The Ball filter also accepts quality management requests from the downstream filter, which illustrates a simple quality management strategy. This filter implements the IQualityControl interface for that purpose.

Downloading the Sample

To download the DirectShow SDK samples, install the latest version of the Windows SDK.

This sample is installed under the following path: [SDK Root]\Samples\Multimedia\DirectShow\Filters\Ball.

DirectShow Samples