[wdmaudiodev] Re: Mixing applications audio stream in driver

  • From: "Matthew van Eerde" <dmarc-noreply@xxxxxxxxxxxxx> (Redacted sender "Matthew.van.Eerde" for DMARC)
  • To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Mon, 4 Feb 2019 17:00:56 +0000

Sorry, but I don’t follow what you’re trying to do. Can you elaborate? Maybe 
draw some audio flow diagrams?

________________________________
From: wdmaudiodev-bounce@xxxxxxxxxxxxx <wdmaudiodev-bounce@xxxxxxxxxxxxx> on 
behalf of eno rocky <binoddummy@xxxxxxxxx>
Sent: Monday, February 4, 2019 4:59:32 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: Mixing applications audio stream in driver

Hi,

lets forget about kmixer.sys.
What about KSCATEGORY_MIXER ? Can it be used for getting separate application 
stream and later mix on my own?
Or, is there any other way ?

Thanks,



On Mon, Feb 4, 2019 at 5:52 PM Matthew van Eerde 
<dmarc-noreply@xxxxxxxxxxxxx<mailto:dmarc-noreply@xxxxxxxxxxxxx>> wrote:
Whatever MSDN document you found should be removed; kmixer.sys hasn’t existed 
since Windows XP.

________________________________
From: wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx
<wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>> on 
behalf of eno rocky <binoddummy@xxxxxxxxx<mailto:binoddummy@xxxxxxxxx>>
Sent: Sunday, February 3, 2019 9:59:33 PM
To: wdmaudiodev@xxxxxxxxxxxxx<mailto:wdmaudiodev@xxxxxxxxxxxxx>
Subject: [wdmaudiodev] Mixing applications audio stream in driver

Hi,

According to msdn document, I found Kmixer.sys does mixing and gave back mixed 
data stream through IMiniportWaveRTStream
Is there any way to mix it in driver.
I found KSCATEGORY_MIXER in ks.h, what does it really do? Is it the one for 
each application stream mixing?
Also I found term hardware mixing. What mixing it refers to?
I am working on virtual driver.

One more thing can we override the volume control of each application like 
master/Endpoint volume in driver?

Thanks,

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