> 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. :) As I would do :) But seems to be not that easy to capture the "start of ringing" in VoIP as it was with ISDN... Regards > > 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 >> > > _______________________________________________ > 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 >
