Using the DSPs

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Microsoft uses the term digital signal processor (DSP) to designate a set of COM objects that perform transformations on uncompressed audio and video data. These DSPs can be used by themselves, or in combination with the Windows Media Audio and Video codecs.

Each DSP, as with the codec objects, implements both the IMediaObject interface and the IMFTransform interface, and can be controlled using either one. The exception is the voice capture DSP.

You can configure the DSPs by using the IPropertyStore interface to set properties. Some of the DSPs have additional interfaces that set properties. To use these interfaces, call the QueryInterface method of any other interface of the DSP.

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