Don’t know. How exactly are you installing the updated version? Can you share
C:\windows\inf\setupapi.dev.log?
________________________________
From: wdmaudiodev-bounce@xxxxxxxxxxxxx <wdmaudiodev-bounce@xxxxxxxxxxxxx> on
behalf of Johannes Freyberger <jfreyberger@xxxxxxxxxxxxxxxxxxxx>
Sent: Tuesday, August 14, 2018 4:58:46 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] AW: Re: AW: Re: AW: Re: set the default audio format
dynamically during/after driver installation
I’m not changing the ID by intention. So when I’m doing a new version the inf
is completely the same, just the line DriverVer=… inside [Version] is changed.
And also the code is sometimes only a minor change in the executed code but no
changed defines or settings. Where is the ID taken from in a virtual driver?
Yes, I’m sending a UDP network stream.
Von: wdmaudiodev-bounce@xxxxxxxxxxxxx <wdmaudiodev-bounce@xxxxxxxxxxxxx> Im
Auftrag von Matthew van Eerde (Redacted sender "Matthew.van.Eerde" for DMARC)
Gesendet: Dienstag, 14. August 2018 13:34
An: wdmaudiodev@xxxxxxxxxxxxx
Betreff: [wdmaudiodev] Re: AW: Re: AW: Re: set the default audio format
dynamically during/after driver installation
There is no way to transfer settings between instances; the best thing is to
ensure the instance ID doesn’t change.
What do you mean by a “stream”? Are you sending it out over the network?
________________________________
From: wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>
<wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>> on
behalf of Johannes Freyberger
<jfreyberger@xxxxxxxxxxxxxxxxxxxx<mailto:jfreyberger@xxxxxxxxxxxxxxxxxxxx>>
Sent: Tuesday, August 14, 2018 4:23:41 AM
To: wdmaudiodev@xxxxxxxxxxxxx<mailto:wdmaudiodev@xxxxxxxxxxxxx>
Subject: [wdmaudiodev] AW: Re: AW: Re: set the default audio format dynamically
during/after driver installation
The audio data is transferred to user mode and from there it’s sent to a stream.
Yes, my driver supports KSPROPERTY_AUDIO_VOLUMELEVEL.
I think, best thing for me would be to transfer settings between instances. Is
there a way to do this?
Von: wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>
<wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>> Im
Auftrag von Matthew van Eerde (Redacted sender "Matthew.van.Eerde" for DMARC)
Gesendet: Dienstag, 14. August 2018 13:10
An: wdmaudiodev@xxxxxxxxxxxxx<mailto:wdmaudiodev@xxxxxxxxxxxxx>
Betreff: [wdmaudiodev] Re: AW: Re: set the default audio format dynamically
during/after driver installation
If you install a second instance of your driver it will have a new instance id
and new settings.
If you upgrade a given instance to the new version of your driver it will keep
the same instance ID and SHOULD keep the same settings, though from your
earlier email this isn’t working for volume for some reason. Does your virtual
driver emulate a hardware amplifier via KSPROPERTY_AUDIO_VOLUMELEVEL?
What does your driver do with audio that is sent to it?
________________________________
From: wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>
<wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>> on
behalf of Johannes Freyberger
<jfreyberger@xxxxxxxxxxxxxxxxxxxx<mailto:jfreyberger@xxxxxxxxxxxxxxxxxxxx>>
Sent: Tuesday, August 14, 2018 3:48:42 AM
To: wdmaudiodev@xxxxxxxxxxxxx<mailto:wdmaudiodev@xxxxxxxxxxxxx>
Subject: [wdmaudiodev] AW: Re: set the default audio format dynamically
during/after driver installation
OK, thanks … and the per-instance-ID changes for pure virtual drivers? So
that’s why I see my driver twice when I don’t remove the old one? Is there a
way to transfer the settings from one instance to another?
Von: wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>
<wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>> Im
Auftrag von Matthew van Eerde (Redacted sender "Matthew.van.Eerde" for DMARC)
Gesendet: Dienstag, 14. August 2018 12:42
An: wdmaudiodev@xxxxxxxxxxxxx<mailto:wdmaudiodev@xxxxxxxxxxxxx>
Betreff: [wdmaudiodev] Re: set the default audio format dynamically
during/after driver installation
Settings are stored per-instance-ID. If your instance ID changes, your settings
are wiped out.
The easiest way to prevent your instance ID from changing is to use real
hardware.
________________________________
From: wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>
<wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>> on
behalf of Johannes Freyberger
<jfreyberger@xxxxxxxxxxxxxxxxxxxx<mailto:jfreyberger@xxxxxxxxxxxxxxxxxxxx>>
Sent: Tuesday, August 14, 2018 3:37:28 AM
To: wdmaudiodev@xxxxxxxxxxxxx<mailto:wdmaudiodev@xxxxxxxxxxxxx>
Subject: [wdmaudiodev] Re: set the default audio format dynamically
during/after driver installation
It’s a pure virtual driver without real hardware. Would there be a different
answer depending from this? A different way to set the format for virtual or
real hardware drivers?
Thanks and best regards,
Johannes
Von: wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>
<wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>> Im
Auftrag von Matthew van Eerde (Redacted sender "Matthew.van.Eerde" for DMARC)
Gesendet: Dienstag, 14. August 2018 12:29
An: wdmaudiodev@xxxxxxxxxxxxx<mailto:wdmaudiodev@xxxxxxxxxxxxx>
Betreff: [wdmaudiodev] Re: AW: Re: set the default audio format dynamically
during/after driver installation
Is your driver installed on real hardware, or are you creating a virtual
root-enumerated node?
________________________________
From: wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>
<wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>> on
behalf of Johannes Freyberger
<jfreyberger@xxxxxxxxxxxxxxxxxxxx<mailto:jfreyberger@xxxxxxxxxxxxxxxxxxxx>>
Sent: Tuesday, August 14, 2018 2:17:28 AM
To: wdmaudiodev@xxxxxxxxxxxxx<mailto:wdmaudiodev@xxxxxxxxxxxxx>
Subject: [wdmaudiodev] AW: Re: set the default audio format dynamically
during/after driver installation
I’m installing my drivers using devcon and normally I’m removing the old
drivers before this by using devcon remove. So probably the driver is
completely removed and no settings will persist. Now I did a test without
calling devcon remove. This results in two instances of my driver. In device
manager both instances show the new version of the driver, in the sound
properties the old version keeps the sample format (44.1 kHz, 16 Bit) while the
new version is set to 48kHz, 24 Bits according to my inf. But the volume
doesn’t persist for the old driver and is set to 100 for both instances.
The way to remove the old driver seems the better way to me and so I’d like to
know if there’s a way to set the default format only via the signed inf file or
also after the driver installation but still inside my installer i.e. by
setting the corresponding registry entries?
Thanks and best regards,
Johannes
Von: wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>
<wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>> Im
Auftrag von Matthew van Eerde (Redacted sender "Matthew.van.Eerde" for DMARC)
Gesendet: Montag, 13. August 2018 16:35
An: wdmaudiodev@xxxxxxxxxxxxx<mailto:wdmaudiodev@xxxxxxxxxxxxx>
Betreff: [wdmaudiodev] Re: set the default audio format dynamically
during/after driver installation
Do other settings persist across driver version upgrade, e.g. volume?
________________________________
From: wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>
<wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>> on
behalf of Johannes Freyberger
<jfreyberger@xxxxxxxxxxxxxxxxxxxx<mailto:jfreyberger@xxxxxxxxxxxxxxxxxxxx>>
Sent: Monday, August 13, 2018 1:49:19 AM
To: wdmaudiodev@xxxxxxxxxxxxx<mailto:wdmaudiodev@xxxxxxxxxxxxx>
Subject: [wdmaudiodev] set the default audio format dynamically during/after
driver installation
Hi all,
I’ve written a virtual audio driver and during the installation I’m setting the
default format by defining the registry entry PKEY_AudioEngine_OEMFormat in my
inf file to 48kHz, 24 Bits. Some of our customers switch this to 44.1kHz, 24
Bits which is also supported by the driver and it works correct. Now when I
provide a new version of the driver the format is set back to 48kHz, 24 Bits
according to the inf file. But from a registry entry I’ve written before, I’d
know that the previous format was 44.1kHz. Is there a way to switch back to
44.1 kHz automatically after the driver update so the customer doesn’t have to
go to the drivers properties and do this manually? I thought about doing this
by finding the corresponding registry i.e. in
SOFTWARE\Microsoft\Windows\CurrentVersion\MMDevices\Audio\Render and set the
values as I can watch it when I do this manually. But this doesn’t seem to
work. Modifying the inf file probably also is no option as this has to be
signed and thus cannot be modified at runtime.
Thanks and best regards,
Johannes
