Re: [Jack-Devel] jack_get_Time() used CLOCK

Am 27.02.2013 11:20, schrieb Clemens Ladisch:
> Christoph Pregla wrote:
>> Am 23.02.2013 12:18, schrieb Clemens Ladisch:
>>> Christoph Pregla wrote:
>>>> Instead of CLOCK_MONOTONIC I want CLOCK_REALTIME to be used for the
>>>> method jack_get_time().
>>> Why do you want to do that?
>> I would like to use Jack in connection with PTP. PTP synchronises the
>> system clock, however, not the MONOTONIC Clock.
> You do know that the sound card's clock typically is completely
> independent from any other clock?  Even in the case where your sound
> device is using the PTP clock?
>
> And what particular implementation of the PTP protocol are you using?
>
> CLOCK_MONOTONIC _is_ affected by ntp changes.  How does your PTP
> implementation handle adjustments?
>
>>> What advantage do you think this gives you?
>> I would like to spend sound in different computers synchronically.
> So you have to resample it.  Why do you want to use jack_get_time() to
> control that?  Can't you query the PTP clock directly?
Correct. But i haven't found  a possibility directly query the PTP time.
PTP puts the sytem clock and i want use to it.
>
> Regards,
> Clemens
> 
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