On Fri, May 18, 2018 at 6:42 PM, Greg KH <greg@xxxxxxxxx> wrote: > On Fri, May 18, 2018 at 06:07:29PM +0530, Muni Sekhar wrote: >> [ Please keep me in CC as I'm not subscribed to the list] >> >> Hi All, >> >> I am trying to characterize the audio synchronization between two >> systems. There is a mechanism to route audio between two systems, we >> run ‘aplay’ at one system and ‘arecord’ in other system. >> >> We need to measure the time difference when audio sample is out at one >> port and arriving at another port in different system. >> >> I plan to add printk’s in “struct snd_pcm_ops” call backs, but does >> these call backs tells when it received first and last audio >> frames\samples? >> >> Or else please suggest any other best method. > > First off you need a "shared timer/clock" between the two systems in > order to have a chance to determine what actually happens here. Good > luck with that! :) Yes, we do have the shared clock. > > Also, there's been tons of research in this area over the years, please > look into that, odds are these problems have been solved already. I > know of several commercial devices that already handle this just fine. > Can you point me some information on this. > best of luck! > > greg k-h -- Thanks, Sekhar _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
