[alsa-devel] alsa timestamps
holindho at cs.helsinki.fi
Mon Nov 19 13:54:16 CET 2007
Heikki Lindholm kirjoitti:
> Hello list,
> I took up some old dusty code of mine that uses snd_pcm_state followed
> by snd_pcm_status_get_tstamp when in capture mode. The code used to
> work, but now the returned timestamps are all zeroes. Is there some API
> change done recently or is the whole timestamping deprecated or
> something? I've tried with different drivers on ubuntu's alsa .14 and
> gentoo's .14. I've also tried mmap'ed and r/w modes, and I'm setting the
> TSTAMP_MMAP sw param.
I figured out that this doesn't happen when using hw:x,y devices. Is it
a documented feature that some (software?) devices don't fill in timestamps?
-- Heikki Lindholm
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