[wdmaudiodev] Re: How to bind a symbolic link to a mixer, mid i or wave device name?

From: Yann Hamiaux <YHamiaux@xxxxxxxxxxxxx>
To: wdmaudiodev@xxxxxxxxxxxxx
Date: Thu, 9 Feb 2006 11:59:55 -0500
hi Uwe,

Well, maybe one thing you can do it's to enumerate all installed instance
(even those not present), check their name in order to know what next
instance Id you can put? In my case I specify the present (currently
plugged) ones, but I guess just removing the flag: DIGCF_PRESENT would do
the job...

        hInfo = SetupDiGetClassDevs(&guid, NULL, NULL, DIGCF_DEVICEINTERFACE
| DIGCF_PRESENT);

Well, this instance id who seem to be add automatically, I wonder how they
build it? Or if the device identifier (midiInGetID) can match with an index
in a SetupDiEnum...? Btw, I saw that some device contain an alias...
"HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Class\{guid..}\00xx|Dri
vers\midi\wdmaud.drv". But that information seem to be useless!?

Maybe I should consider like you try.. having a unique name for our device
with a instance id added. I heard that the user can change the name of his
device on XP? I wonder if your solution will still work?

regards,
yann


-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx]On Behalf Of uwe kirst
Sent: February 9, 2006 11:30 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: How to bind a symbolic link to a mixer, midi
or wave device name?


Yann Hamiaux wrote:

>So far, I've been able to enumerate all MIDI symbolic link and get their
>friendly name. However, when I have 2 devices with the same VID and PID,
the
>friendly name is exactly the same. While when I look to the list mixer name
>they do have a different name "Mixer Device" and "Mixer Device (2)". 
>
Thats probably the situation under XP -> the instance id is added by 
windows atomatically.
Under Vista the instance id is missing (thats at least my experiance).
I tried to add it within my driver, but I found no reliable way of doing 
so. If you have two physical identical devices and you install them
one after each other while the other is not powererd, they will get the 
same name. If you now power them both, they will have the same name, 
because the name is set during install not during driver load.
I personally would prefer to add the unique id owned by the device to 
the friendly name, but this seem to be impossible because the names are 
added during install by the .inf file. If no other idea comes to my mind 
I think I will try to add a random (unique) name by my driver rather by 
.inf file. Maybee that will help?

>So far,
>I deal with some SetupDi... functions to enumerate all devices in a
>category. I also, kind of reverse-engineer the GUID I need for the
>enumeration by looking to the registry under
>"Local_Machine\System\CurrentControlSet\Control\DeviceClasses\". Maybe
there
>is a .h file I should look to have a proper list of these GUID?
>
>  
>
I was told that you generate these GUIDs by yourself with guigen. They 
are added during installation by the .inf file. The header file only 
cointains some predefined (by microsoft) device types.
Uwe

******************

WDMAUDIODEV addresses:
Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx
Subscribe:    mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe
Unsubscribe:  mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe
Moderator:    mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx

URL to WDMAUDIODEV page:
http://www.wdmaudiodev.com/
******************

WDMAUDIODEV addresses:
Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx
Subscribe:    mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe
Unsubscribe:  mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe
Moderator:    mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx

URL to WDMAUDIODEV page:
http://www.wdmaudiodev.com/
[wdmaudiodev] Re: How to bind a symbolic link to a mixer, mid i or wave device name?

Other related posts:
