[wdmaudiodev] Re: Mixing applications audio stream in driver

  • From: eno rocky <binoddummy@xxxxxxxxx>
  • To: wdmaudiodev@xxxxxxxxxxxxx
  • Date: Tue, 5 Feb 2019 10:17:29 +0530

Hi,

When multiple applications sends audio stream, global mixer is mixing
audio.
Is there a way to mix it inside driver. Can driver do that?

Thanks,

On Mon, Feb 4, 2019, 10:31 PM Matthew van Eerde <dmarc-noreply@xxxxxxxxxxxxx
wrote:

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> wrote:

Whatever MSDN document you found should be removed; kmixer.sys hasn’t
existed since Windows XP.


------------------------------
*From:* wdmaudiodev-bounce@xxxxxxxxxxxxx <
wdmaudiodev-bounce@xxxxxxxxxxxxx> on behalf of eno rocky <
binoddummy@xxxxxxxxx>
*Sent:* Sunday, February 3, 2019 9:59:33 PM
*To:* 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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