[wdmaudiodev] Help! Help! MSVAD: passing data from or to the real device
- From: "cool aze" <aze2cool@xxxxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Sun, 24 Sep 2006 14:29:44 +0000
Hi guys,
I am currently writting a vritual audio device and my project started out
from the sample code provided by MS DDK, the MSVAD. I have compiled the code
and succeded to install the MSVAD (simple) on my system. I know I can obtain
data in/out from the functions called
CMiniportWaveCyclicStreamMSVAD::CopyFrom and
CMiniportWaveCyclicStreamMSVAD::CopyTo. The problem is I need to pass/get
this data from/to the real audio device. I have no idea how to achieve it
and been searched through wdmaudiodev mailing list archives, with no luck,
can't found any clue or solution from the mailing list. I just wonder
whether it is possible to do that?
From the DDK documentation, it reads
"User-mode clients call the Win32 function CreateFile with the name of the
device. For example, "\\.\filters\audio\default renderer" could be a link to
the audio device that has been configured for default output. Kernel-mode
clients call ZwCreateFile from kernel mode. After the create-file routine
returns a file handle, KS clients communicate with pin instances through KS
Properties." [extracted from
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/Stream_d/hh/Stream_d/ks-overview_effbcd0a-bbee-49d8-9bc9-d84e83cb1999.xml.asp]
Isn't it what all I have to do is just finding the name of the device and
then obtaining the handle of the device that linked to it by calling
ZwCreateFile? Another question is, how(or where) am I going to find the name
of the device. I am so confused here and please please please help me! My
project has been delayed for more than two months because of this issue :-(
Thank for any help.
_________________________________________________________________
All-in-one security and maintenance for your PC. Get a free 90-day trial!
http://clk.atdmt.com/MSN/go/msnnkwlo0050000001msn/direct/01/?href=http://www.windowsonecare.com/?sc_cid=msn_hotmail
******************
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/
Other related posts:
