[wdmaudiodev] Re: driver/app binding
- From: "Larry Menasco" <menasco@xxxxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Wed, 5 Dec 2007 13:13:04 -0800
Hey People,
Thank you David R. & Jerry E. for putting me on the right track (and sorry
it took so long for me to get back, but I've got sidetracked with other
projects and an out of town trip. I downloaded the directks test app from
MS, and have gotten into it enough to verify that it will do what I need it
to do, i.e. to find an effective way of isolating an audio device from other
audio apps while my app is present. Cool stuff. Now I'm just digesting the
details.
Thanks again, and will probably be back with some more questions.
Larry Menasco
-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of David Roach
Sent: Thursday, November 22, 2007 6:54 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: driver/app binding
DirectKS will allow direct access to drivers under XP. It is roughly
equivalent to exclusive mode in Vista, though considerably more
understanding is required to use it effectively.
http://www.microsoft.com/whdc/device/audio/DirectKS.mspx
http://download.microsoft.com/download/1/8/f/18f8cee2-0b64-41f2-893d-a6f2295
b40c8/DW04022_WINHEC2004.ppt
http://www.hydrogenaudio.org/forums/lofiversion/index.php/t8635.html
Good luck,
David Roach
Optimal Sound
www.optimalsound.net
-----Original Message-----
From: FreeLists Mailing List Manager [mailto:ecartis@xxxxxxxxxxxxx]
Sent: Thursday, November 22, 2007 1:43 AM
To: wdmaudiodev digest users
Subject: wdmaudiodev Digest V4 #204
wdmaudiodev Digest Wed, 21 Nov 2007 Volume: 04 Issue: 204
In This Issue:
[wdmaudiodev] driver/app binding
----------------------------------------------------------------------
From: "Larry Menasco" <menasco@xxxxxxxxxxxxxx>
Subject: [wdmaudiodev] driver/app binding
Date: Wed, 21 Nov 2007 00:43:21 -0800
Hey All,
I spent a half a day looking for some knowledgeable people familiar with
audio drivers, and I must say I think my looking has paid off!
Here's my question: Does anyone know of a way to "bind" a particular audio
device to a particular app in such a way that no other app can have access
to that particular audio device while the first app is active? And oh yes,
I need to be able to do it on an XP os. I'm aware that the Vista Core Audio
API has an exclusive-mode for audio streaming that does essentially what I'd
like to do, but my particular app. needs to work with an XP based program,
so I need to stick with XP (for the moment). The particular audio device
happens to be a USB audio device (micronas based) that when plugged in
brings up a generic composite driver, to which I am able to use waveIn and
waveOut. Is there any way, other than writing a dedicated driver for the
usb audio devices (and at some point I plan to be using two USBs at a time)
to prevent other apps from having access? I know if I don't elect it as the
default, then the other apps (unless specifically pointed to the device)
will leave it alone, but I would prefer not even having that as a
possibility.
And if it can't be done without a driver, then at least you've saved me the
time of finding that out on my own, and I'll then be back for help writing a
driver.
Thanks!
Larry Menasco
------------------------------
End of wdmaudiodev Digest V4 #204
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