Hi all, need some guidance on where in PJSUA/SIP/MEDIA to look. Here is the situation: We have a perfectly (well almost) working client - which only supports G711 u law. We often make a call to various PSTN phones via different SIP gateways. The call flows of those gateways is almost the same - they send 100, then 183, then 200. However, when we test against a specific gateway, for some reason, our client crashes. When we analyzed why, we observed that when PJSIP receives their 183, it tries and creates an audio playback stream assuming it will receive packets in 100 millisecond intervals and 800 samples per frame (that's what our dev_create_stream callback logs reports). However, the gateway is actually sending packets at 20ms @ 160 samples per second. I validated this by analyzing the RTP stream. This is causing my app to crash (my target platform which is android, only works with 20ms @ 160 samples per second). I am trying to figure out where/which function within PJSIP is making this decision so I can set logs and figure out. Any pointer? I am trying to find the root function that starts this chain. The 183 which causes this assumption is: (IP masked) SIP/2.0 183 Session Progress Via: SIP/2.0/UDP xx.xx.xx.xx;branch=0;received=10.1.2.23 Via: SIP/2.0/UDP xx.xx.xx.xx:55014;rport=55014;branch=z9hG4bKPjqpfbDIrPc7bpAeHPUTW61E8cVBU2rSgC From: sip:xx@xxxxxxxxxxx;tag=IV75TC5ysisdH.Har8DDcyVz6JdWmoze To: sip:yy at yy.yy.yy.yy;tag=as31c43fd9 Call-ID: rFqYyqnPI0on7JwDORgmLS-jqoMNj9zI CSeq: 6045 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Contact: <sip:xx at xx.xx.xx.xx> Content-Type: application/sdp Content-Length: 239 v=0 o=root 9255 9255 IN IP4 xx.xx.xx.xx s=session c=IN IP4 xx.xx.xx.xx t=0 0 m=audio 3010 RTP/AVP 0 101 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - a=ptime:20 a=sendrecv -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20100816/2c8bc5ae/attachment.html>
