On 3/19/08, Roland Klabunde <roland.klabunde at freenet.de> wrote:
> > So you want to do some signal analysis. The good news is that the
> > media has been established, so we can just peek at the PCM signal
> > rather than hacking the incoming RTP packets, and this is very easy
> > with PJSUA-LIB!
>
> I'm not up to date here. What in case of G.72x? Does he have access to plain
> PCM data? If so, the signal analysis isn't really that impossible, I claimed
> before :)
Since we've got 183 response with SDP, that means codec has been
negotiated, so we don't need to care about RTP and just work at PCM
level.
> But what in case the user is busy? Or he gets some sort of voice annotation?
> ("Then number you have dialed...") Could become more problematic than,
> though
Well I didn't mean signal analysis is easy. ;-)
What I mean to say was that if you want to peek at the PCM samples,
that should be easy with PJSUA-LIB. For the signal analysis itself,
I'll leave that to Davide. :)
cheers,
-benny
> Regards
>
>
>
>
> ----- Original Message -----
> From: "Benny Prijono" <bennylp@xxxxxxxxx>
> To: "pjsip list" <pjsip at lists.pjsip.org>
> Sent: Wednesday, March 19, 2008 6:45 PM
> Subject: Re: Is possibile to have a on_rx_rtp callback with PJSUA?
>
>
>
> > On 3/19/08, Davide Marrone <unidavide at email.it> wrote:
> >> Roland Klabunde wrote:
> >> >> The the problem is: how can I understand from the statistics when the
> >> >> remote phone is ringing ?
> >> > If there is no explicit RINGING SIP message, you would have to analyze
> >> the
> >> > received RTP in order to find the ringtone pattern... Nearly
> >> impossible, I
> >> > guess.
> >>
> >> Is exactly what I want to do, I want to analyze the RTP traffic and
> >> recognize the ringtone pattern. Firt of all I need to get the RTP
> >> traffic, have you any suggestion to get it?
> >
> > Ah right, I misunderstood what you're trying to do (and it seems that
> > we've been discussing the wrong topic!).
> >
> > So you want to do some signal analysis. The good news is that the
> > media has been established, so we can just peek at the PCM signal
> > rather than hacking the incoming RTP packets, and this is very easy
> > with PJSUA-LIB!
> >
> > What you need to do is something like this:
> > - implement your signal analysis as a sink media port
> > (http://trac.pjsip.org/repos/wiki/FAQ#audio-man)
> > - register this port to pjsua-lib's conference bridge
> > (pjsua_conf_add_port())
> > - once call's media is establish, connect the call's media slot to
> > your signal analysis port (with pjsua_conf_connect()) and begin your
> > signal analysis!
> >
> > Cheers,
> > -benny
> >
>
> > _______________________________________________
> > Visit our blog: http://blog.pjsip.org
> >
> > pjsip mailing list
> > pjsip at lists.pjsip.org
> > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
> >
>
>
> _______________________________________________
> Visit our blog: http://blog.pjsip.org
>
> pjsip mailing list
> pjsip at lists.pjsip.org
> http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org
>
