Re: [9front] [patch] nusb/audio /dev entries fix v2

[cinap_lenrek@felloff.net]

> I liked Sigrid's solution: There should be a new program that sits between the devices
> like #A, nusb and mixfs and supplies a file system compatible with a #A. Something like this:

isnt that basically what mixfs does?

anyway, my concern about this change is that it will
break an existing usecase where when you plug in
usb soundcard that it becomes the default,
without any other action needed.

i agree that the way we do it right now makes
it impossible to have multiple usb soundcards.

but i really would like to preserve the property
that stuff will just freaking work.

so here you go:

http://felloff.net/usr/cinap_lenrek/mixfs.diff

on startup, it scans /dev/audio* which will pick
up usb soundcards as well. (here, now it just
freaking works!).

the active audio device is available in /dev/volume:

term% cat /dev/volume
dev /dev/audio
mix 100 100

you can then change it like:

echo dev /dev/audioUxxxx > /dev/volume

even while audio is currently playing.

when the device errors on write
(like when you pull the usb soundcard),
it will rescan /dev/audio* and switch to
whatever it finds first.

--
cinap