On Thu, 8 Jan 2004, Alfons Adriaensen wrote:
> On Thu, Jan 08, 2004 at 03:04:03PM +0100, Jaroslav Kysela wrote:
>
> > Oops. My fault. For capture is dsnoop plugin, of course (same syntax) the
> > dhare plugin is for playback only.
> >
> > We have the asym plugin in CVS now, so you can combine dshare and dsnoop
> > plugins for the full-duplex operation identified with one name.
>
> One more question if you dont mind....
>
> What does actually happen when using these plugins, a card wich
> interleaves the channels (e.g. EWS88MT), and a mmap'ed interface ?
>
> Do all clients get a pointer to the raw (HW) data and are their
> pointers and offsets manipulated to make them access the right
> channel(s) while they believe they are using 0 and 1, or is the
> data copied for each client ?
Basically, yes. We are able to mmap the DMA ring buffer to more
applications at one time and mangle the stream parameters to satisfy
user's requests. The nice thing is that the mangling is done on the user
level, so the kernel driver is not involved.
> One other matter: in the driver for the EWS88MT you mention that
> the consumer part (device #2) does not function correctly. I tested
> this some time ago and found it worked, but producing a mono signal
> only. If you have any suggestion on where to look to fix this, I could
> have a go.
Thanks for the report. We have ICE1712 datasheet in /pub/manuals directory
at our FTP site.. I have no specific suggestions.
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs
-------------------------------------------------------
This SF.net email is sponsored by: Perforce Software.
Perforce is the Fast Software Configuration Management System offering
advanced branching capabilities and atomic changes on 50+ platforms.
Free Eval! http://www.perforce.com/perforce/loadprog.html
_______________________________________________
Alsa-user mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/alsa-user
