[wdmaudiodev] Re: Port Class Mini-ports
- From: "Olivier Roblin" <oroblin@xxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Tue, 22 Apr 2003 10:59:06 +0200
Actually, nothing prevents you from using Port Class with USB, Fire Wire,
etc...You get audio data from the OS with the PCI MiniPort, and you can then
send them on the USB for example. But the Port Class doesn't provide any
service to do that! You have to build the URB and the IRP to send your
packet. This is not very easy the first time you do it...But you have also
to do that if you use the Stream class.
Olivier
----- Original Message -----
From: "BlazeAudio Developer" <developer@xxxxxxxxxxxxxx>
To: <wdmaudiodev@xxxxxxxxxxxxx>
Sent: Friday, April 18, 2003 4:19 AM
Subject: [wdmaudiodev] Port Class Mini-ports
> The DDK says that Port Class drivers:
>
> Do not support external buses (for example, USB). All port drivers support
> devices that reside on the system buses (ISA, PCMCIA, and PCI).
> Is there a specific reason for this?
>
> What prevents a driver from grabbing the data and passing it on to a lower
> level USB or other bus driver?
>
> Thanks.
> Devendra.
>
>
>
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