[Ksummit-discuss] [TECH TOPIC] mobile phones

Pavel Machek pavel at ucw.cz
Mon Jun 26 11:14:22 UTC 2017


On Mon 2017-06-26 11:54:51, Mark Brown wrote:
> On Sun, Jun 25, 2017 at 12:48:50PM +0200, Pavel Machek wrote:
> 
> > 2) How to handle GSM audio?
> 
> Do you have some more specific concern?  This already works basically
> fine upstream, we happily support off-SoC audio paths.  The digital
> configuration could do with being more flexible but it works and people
> ship it.  It would be awfully nice to have some control/visibility of
> the modem side but that's just a missing driver problem.

Well, I was told gsm audio is different, because it is packetized, has
additional timing info, and does not transmit silence.

So we have /dev/cmtspeech instead of second sound card.

Is there any GSM audio driver that actually uses sound framework
properly?

Best regards,

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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