[wdmaudiodev] Re: DirectKS not working properly on XP with an USB device
- From: Tim Roberts <timr@xxxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Fri, 25 Jun 2010 09:57:54 -0700
Maciej Cieślak wrote:
> I am developing an application that plays audio on an USB device using
> Kernel Streaming. This program is designed to work with one specific
> device.
> When I am using the DirectKS sample (slightly modified to pick the
> right device) on Vista or 7, everything works properly. However, on XP
> I experience some serious problems: the packets are returned not in
> order and irregularly.
>
We can't diagnose this with the information you have provided. A big
part depends on how you have coded the application. Buffers are always
completed in order, but once they get to your application, anything can
happen, especially with a multithreaded app on a multicore processor.
> The problem is very interesting for me, because KS is supported in
> Windows XP and not supported in Vista and above, and I experience
> something completely opposite.
>
Where did you hear that KS is not supported in Vista and above? That's
nonsense. It's still very alive and well.
--
Tim Roberts, timr@xxxxxxxxx
Providenza & Boekelheide, Inc.
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