[wdmaudiodev] Re: WDM Audio Subdevice registration and unregistration
- From: Uwe Kirst <u.kirst@xxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Wed, 25 Jun 2008 16:06:28 +0200
Hello Lee Laborczfalvi ,
your vista approach sounds interesting.
I once did something similar: instead of unregistering each subdevice I
wrote a user mode program which did reload the complete driver. So I
dont have to modifiy my driver very much, expecially I dont have to
change the unregisterring which is done by the os. I dont need an extra
IOCTL.
The disadvantage of my approach is that it takes very long since all
devices have been updated (about some minutes). I could watch the
devices disapear one after each other and appear again in the control
panel. After all devices have disapeared there is a pause, I have to
wait for a minute or so before
they apear again (I used a quad core computer for testing).
But basically my approach worked. I could change the default samplerate
that way.
Your approach may be a little bit faster since you dont need to reload
the complete driver. Please let me know if you make progress.
/Uwe
Lee Laborczfalvi schrieb:
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.
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