Still trying to programmatically read the Windows audio stack's "2- ", "3-
" etc. prefixes which it adds into duplicate device names. This is in the
context of a PortCls MIDI miniport driver for a USB device.
In Device Manager's device properties dialog, on the properties list, I
noticed the following...
{b3f8fa53-0004-438e-9003-51a46e139bfc}[7]
...the value of which appears to be an integer that ascends from zero and
seems to reliably correspond to Microsoft's prefixed integer on the device
name. Does anybody know where and how I can access this property for my
own device, from my kernel driver?
It doesn't appear to be part of the
MMDevices/Audio/Capture/<guid>/Properties registry key.
On Sat, Aug 1, 2015 at 8:49 AM, Andrew Vogan <andrewvog@xxxxxxxxx> wrote:
OK, if nobody knows how to change it, is there at least a way to detect
from my kernel driver what numeric prefix the audio stack is adding to my
friendly name? The reason is that I am exposing a (third party standard)
ASIO audio device in addition to the native Windows MIDI device. Obviously
I have complete control over the ASIO device name, and ideally I'd like the
ASIO and MIDI device names to match.
Regards,
Andrew
On Thu, Jul 16, 2015 at 1:10 PM, Andrew Vogan <andrewvog@xxxxxxxxx> wrote:
My client wants to override the friendly MIDI device name specified in
the INF and follow a scheme like the following when multiple identical
devices are connected...
"My Device"
"My Device (2)"
"My Device (3)"
... and so on. However, the audio stack is inserting a uniquifying
prefix of "2- " onto the device name. Where does that come from, and is
there a way to override it?
I can already change the FriendlyName successfully
via IoOpenDeviceInterfaceRegistryKey following IoGetDeviceInterfaces with
the PDO. This sends me to the following registry location, at least on
Win8.1:
Key:
Control\DeviceClasses\{6994ad04-93ef-11d0-a3cc-00a0c9223196}\##?#USB#VID_<myvid>&PID_<mypid>#<myserial>#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\#Uart\Device
Parameters
Value name "FriendlyName" of type: REG_SZ
When I change the FriendlyName value, I can successfully see the new name
as I enumerate MIDI devices, however I also still see the unwanted, and in
my opinion, no longer necessary prefix of "2- ", so I end up with a device
name of "2- My Device (2)" and so on. Ideas?
Regards,
Andrew
