[pulseaudio-discuss] Pulseaudio with Application Asterisk

[Lennart Poettering]

On Thu, 14.02.08 20:10, Jim Duda (jim at duda.tzo.com) wrote:

> 
> Here is the Asterisk alsa write code loop.  I added the trap for -EIO. 
> I'm getting an negative return from snd_pcm_recover.
> 
> [Feb 14 20:08:25] ERROR[3085]: chan_alsa.c:404 alsa_write: 
> snd_pcm_recover failed Input/output error
> 
> Is there anything obvious which needs to be done to make this more pulse 
> friendly?

Not sure. The general logic of snd_pcm_recover should be like this:

for (;;) {
      if ((err = snd_pcm_writei(....)) >= 0) 
         /* Success */
         break;

      /* Failure, try to recover */
      if ((err = snd_pcm_recover(..., err)) < 0) {

         /* Failed to recover, we have a real issue */
         fprintf(stderr, "Things went very wrong: %s", snd_strerror(err));
         break;
      } 

      /* Recovered, let's try another write */
}

This probably won't fix your issue, but it will shorten your code
quite a bit I would say and make it more robust.

snd_pcm_prepare() should be called only once after
init. snd_pcm_recover() will implicitly call _prepare() in all other
cases.

Lennart

-- 
Lennart Poettering                        Red Hat, Inc.
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