karsten wiese wrote:
> here is the routine that is used in snd-usb-us428:
> ...
> its a copy-change of usb-audio. something wrong here ?
No, it's fine. The problem is elsewhere.
> > IMHO the "best" solution would be to add a quirk to
> > usbaudio.c, (...) (I'm sure I've missed something.
> > :)
> the us-428 audio is very nonstandard:
> it is necessary to know how many frames are just
> recorded to be able to playback without unwanted
> crackles.
I.e. an asynchronous endpoint without frequency feedback? :-(
There isn't a second endpoint in the playback interface?
> furthermore there are the hardware knobs, sliders and lights,
> the digital in switch....
... and I guess those aren't in any way compatible with USB audio mixer
controls.
> > Autoloading happens if there is an alias for
> > snd-card-x (x derived from
> > the client number) in modules.conf, ...
>
> I put a line
> "alias snd-card-1 snd-usb-midi"
> (the us-428 is my second card)
> into modules.conf. is it this what you suggest?
No, the alias should be for the card driver:
alias snd-card-1 snd-usb-us428
> unfortunately the autoload still does not happen.
Autoloading works for sequencer ports and for "real" rawmidi devices,
but not for rawmidi devices emulated on top of a sequencer port.
Takashi, would it be possible/desirable to change snd_rawmidi_hw_open()
to load sequencer drivers if the card driver is loaded but the rawmidi
device doesn't exist?
Something like:
if ((fd = open(filename, fmode)) < 0) {
- snd_card_load(card);
+ card_loaded = snd_card_load(card) == 0; // 0 or 1?
- if ((fd = open(filename, fmode)) < 0) {
+ fd = open(filename, fmode);
+ if (card_loaded && fd < 0) {
+ load_seq_dev(...); // hw_open, get_client_info ?
+ fd = open(filename, fmode);
+ }
+ if (fd < 0) {
snd_ctl_close(ctl);
SYSERR("open %s failed", filename);
return -errno;
}
}
Regards
Clemens
-------------------------------------------------------
This sf.net email is sponsored by: viaVerio will pay you up to
$1,000 for every account that you consolidate with us.
http://ad.doubleclick.net/clk;4749864;7604308;v?
http://www.viaverio.com/consolidator/osdn.cfm
_______________________________________________
Alsa-devel mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/alsa-devel
