Re: Kernel streaming
From: Chris P. [MVP] (msdn_at_chrisnet.net)
Date: 09/30/04
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Date: Thu, 30 Sep 2004 13:24:58 -0400
Iain wrote:
> On Thu, 30 Sep 2004 09:55:03 -0700, gonzo wrote:
>
>> Every once in a while I see a reference to " Kernel streaming" here.
>>
>> What does this refer to and where can I find out more about it?
>>
>> Thanks,
>>
>> gonzo
>
> I'm not sure where to start from.
>
> Kernel streaming is a scheme to push data through the PC at the Device
> driver level whilst controlling it from an application.
>
> This avoids bringing samples across the OS (kernel) / Application
> interface which apparently is inefficient. It also (probably) allows
> samples to stream between devices without requiring processor
> intervention.
>
> The architecture reflects that of Direct Show with Filters and Graphs.
>
> Direct Show itself provides some wrapper filters which sit in
> application space but control real filters sitting in kernal space.
>
> The documentation sucks (actually, being English I was strongly
> inclined to use a stronger term...).
>
> There is a smidgeon in the Direct Show documentation, but most of what
> documentation there is is in the Device Driver SDK.
>
> An example of where you can use this is to use the kernel versions of
> hte audio IO devices to achieve VERY low latency ( 2mS is quite
> feasible) throughput.
>
> Hope this is useful.
It was way better than my answer :)
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