[wdmaudiodev] Re: silly question about pin property and filter property
- From: Tim Roberts <timr@xxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Tue, 27 Feb 2007 09:40:22 -0800
Yong Liu wrote:
> Thanks for all your responses. when I used setupdixxx and createfile,
> I think I got the handle to the filter. Because as I changed to
> declare the property item in the automation table in filter
> descriptor, I can set the property to filter. But in my project, I
> need to set the property to the pin. I read Directks sample, and it
> has a way to create a pin in user mode, but that method is not
> suitable for me. Actually, there are two user mode applications in
> this project to communicate with the same driver, but only one pin can
> be instantiated. In one applicaiton, only filter created and sent
> property to driver, the property is used by pin created in the second
> application (such as graphedit) which instantiated filter first. The
> problem is in the driver, I could not get the handle to the pin
> created by the second application. Do you have any ideas to set the
> property to the pin?
You can't send property requests to a pin in another application. You
should be able to see why that would be a problem.
If this is a driver you control, you can always force a particular
property setting when you initialize the pin. Somehow, you have to be
able to identify the circumstances that should trigger your new setting.
--
Tim Roberts, timr@xxxxxxxxx
Providenza & Boekelheide, Inc.
******************
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:
