From mboxrd@z Thu Jan  1 00:00:00 1970
From: Takashi Iwai <tiwai@suse.de>
Subject: Re: pointer callback question
Date: Fri, 13 Feb 2009 07:26:24 +0100
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To: Tim Blechmann <tim@klingt.org>
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At Thu, 12 Feb 2009 19:04:10 +0100,
Tim Blechmann wrote:
> 
> Takashi Iwai wrote:
> > At Thu, 12 Feb 2009 18:55:49 +0100,
> > Tim Blechmann wrote:
> >>>> the brief log is (4 periods of 64 frames):
> >>>> stream_pointer at 64
> >>>> stream_pointer at 128
> >>>> stream_pointer at 192
> >>>> stream_pointer at 256
> >>> This is invalid.  The pointer callback must return 0 in this case.
> >>> The value the pointer callback returns is between 0 and buffer_size-1.
> >> sry, typo, 5 periods of 64 frames
> > 
> > Then it must be OK.  If the stream is stopped, it's likely by the
> > buffer underrun detection or so...
> 
> is there any way to compile alsa to get some debugging information about
> that?

Did you enable CONFIG_SND_DEBUG=y and others?


Takashi