[alsa-devel] POSIX clocks and ALSA

Heikki Lindholm holindho at cs.helsinki.fi
Mon Nov 26 08:59:29 CET 2007

Jaroslav Kysela kirjoitti:
> On Mon, 26 Nov 2007, Heikki Lindholm wrote:
>> Hello,
>> Some years ago there was some talk about UST support in Linux, but the 
>> support never happened. With the hrtimers patch (and I'm not quite sure 
>> if even earlier?) CLOCK_MONOTONIC would seem like a fairly good UST time 
>> source. What I'd like to see, is a selectable clock for ALSA 
>> timestamping, e.g. something like snd_sw_params_clock(..., clockid_t 
>> clk). Would this seem plausible? I don't know that much about ALSA 
>> internals, so, no idea whether different clocks on different 
>> pcms/whatever would quickly turn into an unmanageable mess.
> We are aware about this extension and I already proposed an 
> implementation. I hope to implement it soon. Timestamps are not used in 
> driver internally.

I can't seem to google up the proposal. I'd like to read it; was it on 
the alsa ml?

-- Heikki Lindholm

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