[alsa-devel] [PATCH 2/2] ALSA: hda: support for wallclock timestamps

Clemens Ladisch clemens at ladisch.de
Thu Jun 14 10:15:35 CEST 2012

Pierre-Louis Bossart wrote:
> As long as you have 2 periods or events per 179s, the wrap-around can
> be detected without any issues. It's explicitely handled in the code.

AFAICS there is no code that enforces the 179s restriction.

And why are you using a separate wallclock timer instead of the sample
count?  Does the higher resolution result in a noticeable improvement?

How should userspace detect streams whose sample clock is not
synchronous with this wall clock, such as digital inputs?


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