linuxaudio.org

On 05/08/2012 05:24 PM, Fons Adriaensen wrote:

quoted text
> On Tue, May 08, 2012 at 03:50:44PM +0200, Robin Gareus wrote:

>

>> @Paul, Fons,..: does it use a PLL or simply return the difference from

>> clock_gettime() since the beginning of the cycle?

>

> jack_frame_time() reads the current time from Jack's usecs timer,

> subtracts the cycle start time estimated by the PLL, converts the

> difference to frames, and adds the frame count at the start of the

> current cycle (which is jack_last_frame_time()).

>

>> IIRC Fons reworked some of jack timing functions not too long ago when

>> writing zita-a2j, zita-j2a, but don't know if they also affect the

>> transport API.

>

> The changes do not modify any part of the API, they add to it.

>

> Ciao,

thanks for this explanation.

robin

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