>> > 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.
> 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 :)
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
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
>
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