Hi all

if I have a figure like this

input-->
[node] --->output
input-->

How to setting KSTOPOLOGY_CONNECTION structures ??

and

when should I need to setting a TOPOLOGY??

Thanks a lot

Re: How to setting KSTOPOLOGY_CONNECTION structures ?? by Max

Max
Tue Jun 01 17:38:29 CDT 2004

Check out http://www.osr.com/ddk/stream/pcdesign_1b1j.htm
In general topology is need for every AVStream minidriver. For Stream Class
based topology was not usually used (I don't know what happened to it with
Stream Class 2.0)

In practise however only a very few applications require topology.
Something that builds complex graph or builds generic graph (MS VidControl,
for example) relies on topology to make intelligent decisions about graph
building logic.

Simple apps usually don't care about topology at all.
-- Max.



"paullee" <paullee@iei.com.tw> wrote in message
news:b308514d.0406010255.2651bffb@posting.google.com...
> Hi all
>
> if I have a figure like this
>
> input-->
> [node] --->output
> input-->
>
> How to setting KSTOPOLOGY_CONNECTION structures ??
>
> and
>
> when should I need to setting a TOPOLOGY??
>
> Thanks a lot



Re: How to setting KSTOPOLOGY_CONNECTION structures ?? by Igor

Igor
Wed Jun 02 04:02:24 CDT 2004

If you are writing audio miniport (KSCATEGORY_AUDIO),
topology information is strictly required for sysaudio.sys driver.