[alsa-devel] POSIX clocks and ALSA
holindho at cs.helsinki.fi
Mon Nov 26 08:59:29 CET 2007
Jaroslav Kysela kirjoitti:
> On Mon, 26 Nov 2007, Heikki Lindholm wrote:
>> 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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