I have some doubt in ccrtplib

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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