[wdmaudiodev] USB audio driver architecture question
- From: pgruebele@xxxxxxx
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Wed, 29 Apr 2009 20:16:03 -0400 (EDT)
Hi All.
It looks like I will have to develop a USB audio driver because
USBAudio.sys has too many limitations - especially bandwidth.
I have read various posts and done a good amount of research and it
seems there are 2 options to start with:
1. use AVSHws as the basis for the driver
2. use msvad as the basis for the driver
Since this is a USB audio driver, I am concerned with issues related to
surprise device removal. MS specifically states that port class drivers
(like msvad) do not support extrnal buses like USB. However, it seems
that the msvad samples are better documented and implement more audio
related functionality so this would make things easier to start with.
Can someone knowledgeable in this area comment on this dilemma? Can
msvad be made to work with surprise removal? If so, how? Are there any
better AVStream samples out there?
Also, could someone point me to some good information on how insertion
and removal for such a device would be handled in general?
Thanks a lot
Philip
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