[wdmaudiodev] Re: Hardware mixing
- From: Vipin Kumar <vipin@xxxxxxxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Mon, 16 Mar 2009 09:54:25 -0800
Hi,
thanks for pointing that out , basically i don't want to skip kmixer,
but want it create multiple streams, for some streams, remaining streams it
can mix
i tried creating multiple input streams( say 4 sound recorders working,)
and i was able to get 4 streams , i would like to receive the same mechanism
for playback also.
Also, i have found that user mode multimedia drivers can also do similiar
job but i was not able to find any samples for them except some
documentation in msdn. follow
http://msdn.microsoft.com/en-us/library/aa929612.aspx
Do any samples exist for user mode installable multimedia drivers?? can
some one point me out.
Thanks for your time.
Vipin
On Mon, Mar 16, 2009 at 9:12 AM, Tim Roberts <timr@xxxxxxxxx> wrote:
> Vipin Kumar wrote:
> >
> > Lets say a real sound card can mix 64 playback streams in
> > hardware,(but then this functionality is never used because kmixer
> > will do the mixing in software) , so how to tell the kmixer to not mix
> > streams, but instead invoke new streams, so as we can handle the
> > mixing ourselves.
> >
> > come on, the makers of audio devices( real hardware devices) must be
> > doing this
>
> Why do you think so? The kernel mixer is pretty good, it's easier to
> debug than hardware, and it can handle an arbitrary number of streams.
> Whatever solution you propose is going to have some upper limit. What
> happens when you hit the limit?
>
> If you develop a mixer, then I think you write a mixer driver, not a
> render driver. However, I'm getting out of my depth here.
>
>
> > there should be a way, to stop kmixer mixing for all streams.
>
> I don't know how hard you looked, but it only took me one Google page to
> find this:
> http://wiki.hydrogenaudio.org/index.php?title=Bypassing_Windows_Mixer
>
> --
> Tim Roberts, timr@xxxxxxxxx
> Providenza & Boekelheide, Inc.
>
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--
--
Thanks & Regards
=================
Vipin.
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