[wdmaudiodev] Re: WDM Audio Subdevice registration and unregistration
- From: Ken Cooper <Ken.Cooper@xxxxxxxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Wed, 3 Sep 2008 07:52:14 -0700
Uwe,
What is the purpose of your dynamic loading and unloading? Also, what OS
is your target and what is your port/miniport model (WaveCyc, WavePci, WaveRT,
etc.)? We added some support in Vista to separate out the registration of
subdevices from the publication of their device interfaces (i.e. - publicizing
them to the system), so perhaps there is another approach that may make sense
for your application. In any case, what you are attempting can definately be
done.
Ken
________________________________________
From: wdmaudiodev-bounce@xxxxxxxxxxxxx [wdmaudiodev-bounce@xxxxxxxxxxxxx] On
Behalf Of Uwe Kirst [u.kirst@xxxxxx]
Sent: Wednesday, September 03, 2008 5:02 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: WDM Audio Subdevice registration and unregistration
> [wdmaudiodev] WDM Audio Subdevice registration and unregistration
> From: "Lee Laborczfalvi" <labor.lg@xxxxxxxxx>
> To: wdmaudiodev@xxxxxxxxxxxxx
> Date: Wed, 25 Jun 2008 16:57:34 +1000
>
>> I am working on modifying the MSVAD sample driver (simple) running on
>> Windows Vista in order to allow the Wave and Topology subdevices to be
>> registered in response to an IOCTL sent from a user mode process.
>> This is
>> to provide dynamic subdevice creation functionality. I am also adding
>> functionality to unregister the devices when a second IOCTL is received.
>
> I
I would like to know how to do the unregistering. Is there an example in
the ddk? The registering is simple, because all examples used to do it.
So far I did the unregistering by unloading the driver by a user mode
progam. I would like to know wether the IOCTL approach is significantly
faster (64 subdevices take some time)?
I also do not like the idea with my approach that there is some time
between the unloading / reloading where the hardware is not controlled
by any driver.
/Uwe
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