[wdmaudiodev] AVStream filter centric question

From: Jeff Claar <jclaar@xxxxxxxxxxx>
To: wdmaudiodev@xxxxxxxxxxxxx
Date: Tue, 2 Mar 2004 13:00:51 -0800

Hi all,

I'm creating an AVStream filter-centric audio transfrom filter that has one
sink pin and one source pin. In KSStudio, I'm connecting the PCM tone
generator to the input pin, and a renderer to the output pin. Everything
connects as I would expect, and both pins are instantiated. When I play the
audio, my filter's Process dispatch function does not get called at all,
until I close KSStudio. At this point, the Process dispatch is called four
times, but there is only one pin (the sink pin) listed in the
KSPROCESSPIN_INDEXENTRY parameter. I'm assuming the dispatch function isn't
being called earlier because there are no frames to process in the source
pin's queue, but I'm not sure how those are supposed to get there in the
first place.

Any ideas?

Thanks,
Jeff

[wdmaudiodev] AVStream filter centric question

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