[alsa-devel] Backported sbxfi driver (UNTESTED!)

[Takashi Iwai]

At Fri, 17 Oct 2008 13:17:28 +0400,
The Source wrote:
> 
> Xarteras пишет:
> > Takashi Iwai wrote:
> >> At Fri, 17 Oct 2008 10:26:27 +0400,
> >> The Source wrote:
> >>> Takashi Iwai пишет:
> >>>> At Thu, 16 Oct 2008 22:18:07 +0400,
> >>>> The Source wrote:
> >>>>  
> >>>>>>> Ok. OpenAL with alsa also seem to cause problems.
> >>>>>>>             
> >>>>>> In both cases, check the period_size and buffer_size values 
> >>>>>> (shown in
> >>>>>> the kernel message, or /proc/asound/card0/pcm0p/sub0/hw_params).
> >>>>>> And, try to aplay with these parameters, whether you get the similar
> >>>>>> problem.
> >>>>>>
> >>>>>>     % aplay -v --period-size=xxx --buffer-size=yyy foo.wav
> >>>>>>
> >>>>>>
> >>>>>> Takashi
> >>>>>>
> >>>>>>         
> >>>>> I'm sorry, but any attemp to play file with ossplay results in 
> >>>>> complete system hang with error:
> >>>>> unable to handle NULL ponter dereference at address 
> >>>>> 0000000000000008.....(hang, no more output).
> >>>>> I tried many wav formats. So I can't get error log or period and 
> >>>>> buffer sizes, sorry.
> >>>>>     
> >>>> Can anyone confirm to reproduce Oops with OSS apps (ossplay)?
> >>>>
> >>>> I'm wondering whether this has anything to do with the capture.
> >>>> Can you record the sound, and change the capture mixer element 
> >>>> properly?
> >>>>
> >>>>
> >>>> thanks,
> >>>>
> >>>> Takashi
> >>>>
> >>>>   
> >>> Err, I'm not sure I understand. Could you please explain step-by-step?
> >>
> >> Just run arecord to record something.  And, change the recording
> >> source via mixer.
> >>
> >> So far, I got little report about recording, and I'm not sure whether
> >> it works at all.
> >
> > I just tested ossplay and arecord.
> > For me both result in a spontanous crash back to BIOS without leaving 
> > any traces in the log files.
> > Everything else works fine so far.
> >
> > Jan Wolf
> >
> Seems that only one application at a time can use alsa. All other apps 
> say they can't initialize sound until I close the first app.

Yes, it's a design, so far.
Right now, DSP is bypassed and the SRC is directly connected (as far
as I understood from the code).  So, I guess multi-playing won't work
without DSP codes.

You can use dmix instead.  At least, there is one positive report :)
For testing, just run like
	% aplay -Dplug:dmix foo.wav
   

Takashi