[alsa-devel] [PATCH v4 05/10] ALSA: core: selection of audio_tstamp type and accuracy reports

[Pierre-Louis Bossart]

On 1/31/15 1:37 AM, Alexander E. Patrakov wrote:
> 31.01.2015 04:55, Pierre-Louis Bossart wrote:
>> Audio timestamps can be extracted from sample counters, wall clocks,
>> PHC clocks (Ethernet AVB), on-demand synchronized snapshots. This
>> patch provides the ability to report timestamping capabilities, select
>> timestamp types and retrieve timestamp accuracy, if supported.
>> Details can be found in Documentations/sound/alsa/timestamping.txt
>
> I think that it is a good idea to add some example ./audio_time output
> on a card that is neither HDAudio nor USB audio (i.e. a card not
> specifically touched by your patches), so that the fallback behavior is
> known.

I didn't change the USB behavior, only fixed the way the trigger_tstamp 
is found, and yes it shows what the fallback is. And the documentation 
is already quite long, I wonder how many people will read it to the end 
without falling into a deep coma ;-)