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Re: [Ccrtp-devel] I have some doubt in ccrtplib

From: Federico Montesino Pouzols
Subject: Re: [Ccrtp-devel] I have some doubt in ccrtplib
Date: Wed, 21 Sep 2005 18:00:18 +0200
User-agent: Mutt/1.5.9i


1. If you want to get jitter values as recommended in the standard,
the best way to do so is retrieving the info from RTCP packets. Beware
that a not fully tested fix for jitter calculation was made yesterday
in CVS, as it was buggy. Anyway, if you want to do any low-level
operations on the RTP packets, you can write your own class inherited
from AppDataUnit that provides access to the IncomingRTPPkt class.

2. Yes, I think we should add the onGotRR, onGotSR, etc stuff to the
rtpsend demo. It wasn't added at the time just as a way to keep the
example code short, but it is confusing that these virtuals are used
only on the rtplisten side.


On Tue, Sep 20, 2005 at 07:16:35PM +0000, sasin janpungtong wrote:
> after i modified RTPSend and RTPlisten to send and receive data from 
> file..... i look result of my program and some confuse was happen......
> 1. I want to calculate jitter between send and receive RTPpacket but when i 
> look at my code..... it use putData and getData (use AppDataUnit) function 
> replace generating RTP packet, so from AppDataUnit i can't get RTP packet 
> timestamp to use for calculate my jitter..... have some way to cast 
> AppDataUnit to RTP packet or someway to replace putData and getData by 
> generate RTP packet and send and receive it in session and i want to know 
> about responsibility of putData and getData functions.
> 2. why have function onSR() and onRR() and other method about RTCP packet 
> only on rtplisten.cpp ..... i think onRR must be on rtpsend because it will 
> retreive data in this packet and when i retreive value of ssrc, jitter and 
> fraction lost of RR packet.... it show unusual value i want to know 
> function to retreive those value .... now i use this way on onRR() function 
> "RR.blocks[1].rinfo.jitter".
> Thanks for your time
> Sasin
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