[alsa-devel] snd_pcm_link : Function not implemented

[Takashi Iwai]

At Thu, 16 Jun 2011 16:39:04 +0530,
ashwanik wrote:
> 
> 
> 
> 
> On Thursday 16 June 2011 04:13 PM, Takashi Iwai wrote:
> > At Wed, 15 Jun 2011 05:50:29 +0000 (UTC),
> > Ashwani Kumar wrote:
> >> ashwanik<ashwani.kumar<at>  freesystems.biz>  writes:
> >>
> >>> Hi All,
> >>>
> >>> I have download and compile latency.c application from
> >>> http://www.alsa-project.org/alsa-doc/alsa-lib/_2test_2latency_8c-example.html.
> >>> This application is  working fine on  Linux PC.
> >>> But when I am using this application on my omap4 board(using
> >>> ubuntu10.10) is not working.
> >>>
> >>> I am getting"Streams link error: Function not implemented" error. I
> >>> debug the application and found this error coming from the
> >>> *snd_pcm_link* function.
> >>> I am using ALSA Driver Version 1.0.23.
> >>>
> >>> please find pointers.
> >>>
> >>> Thanks in Advance
> >>> Ashwani
> >>>
> >>>
> >> Hi,
> >> Bringing to Top ,anyone faced similar problem of "snd_pcm_link" returning error
> >> val=-38 and prints "Streams link error: Function not implemented".
> > I don't know of such a problem.  Better to check what went wrong via
> > strace or such.
> >
> >
> > Takashi
> Thanks for your reply,
> 
> I left that application(latency.c).
> now i have merged alsa playback and capture application and thats 
> working with following issue on omap4 board:
>  > when i am executing this apps getting "underrun occurred" error

This is usually a driver issue.

>  > CPU consumption very high 22 - 27%.

This is normal.  It's a sort of stress-test, after all.


Takashi