Wow Thanks, that was really helpful Mathew.
I was able to do lots of thing with that.
Except RegisterDuckNotification for IAudioSessionManager2 returns OK but
notification never get called.
Thanks,
On Tue, Feb 5, 2019 at 10:30 PM Matthew van Eerde <
dmarc-noreply@xxxxxxxxxxxxx> wrote:
You don’t need to write a driver to control application volume. There’s an
API for that.
https://blogs.msdn.microsoft.com/matthew_van_eerde/2013/09/26/getting-peak-meters-and-volume-settings-for-all-apps-and-audio-devices-on-the-system/
There’s also already UI in Windows that users can use to control
application volume.
------------------------------
*From:* wdmaudiodev-bounce@xxxxxxxxxxxxx <wdmaudiodev-bounce@xxxxxxxxxxxxx>
on behalf of eno rocky <binoddummy@xxxxxxxxx>
*Sent:* Tuesday, February 5, 2019 6:32:50 AM
*To:* wdmaudiodev@xxxxxxxxxxxxx
*Subject:* [wdmaudiodev] Re: Mixing applications audio stream in driver
Hi,
Thank you for clarification that was clear.
The main purpose of it was to gain control over each application stream
volume.
As I don't think we can override the application volume in driver either.
Thanks,
On Tue, Feb 5, 2019, 3:36 PM Matthew van Eerde <
dmarc-noreply@xxxxxxxxxxxxx wrote:
Since Windows Vista, no.
Windows mixes audio from all the applications together (inside the
“user-mode audio engine”) and hands the result of the mix to the audio
driver, which is expected to hand it directly to the digital-to-analog
converter without further mixing.
(It’s actually a little more complicated than that, but that’s the basic
idea.)
But what are you really trying to do? Suppose I had said “yes”. What is
your scenario? Why do you want to mix inside an audio driver?
------------------------------
*From:* wdmaudiodev-bounce@xxxxxxxxxxxxx <
wdmaudiodev-bounce@xxxxxxxxxxxxx> on behalf of eno rocky <
binoddummy@xxxxxxxxx>
*Sent:* Monday, February 4, 2019 8:47:29 PM
*To:* wdmaudiodev@xxxxxxxxxxxxx
*Subject:* [wdmaudiodev] Re: Mixing applications audio stream in driver
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,
