14 Dec
2010
14 Dec
'10
5:20 p.m.
Jean-Yves Avenard wrote:
By default, Myth uses mmap access
Why?
Problem, turned out his was using a USB audio device, and snd_pcm_hw_params_set_access didn't return any error.
USB audio devices do support mmap.
... I decided to stop using mmap and instead use snd_pcm_writei.
Now on my system, this has added quite a bit of latency and the A/V sync isn't perfect anymore...
Using mmap neither reduces latency, nor does it improve synchronization.
Is there an official way to calculate an average system latency (doesn't need to be perfectly accurate).
Not the average, but try snd_pcm_delay().
Regards, Clemens