RE: [AVT] Implementation issues for RTP Stack implementation.

["Bino George" <gbino at kodiaknetworks.com>]

Dear Lavin: 
Even though it is in-appropriate RTP implementation discussion, I am
just sending a reply to reduce the learning curve. 
-----Original Message-----
From: avt-bounces at ietf.org [mailto:avt-bounces at ietf.org] On Behalf Of P
Lavin
Sent: Thursday, August 12, 2004 10:14 AM
To: avt at ietf.org
Subject: [AVT] Implementation issues for RTP Stack implementation.

Hi,

Last month i've send one mail to this group for some kind of Design 
specification for RTP, but i've'nt got any response. Now i've come up 
with a High level as well as a low level design. Now i've to some doubts

re gegarding the implementation. I'm implementing RTP on some RTOS.

1)We need multiple sessions to be maintained. We've a structure in which

all the session details are maintained. For multiple sessions weather we

need to implement some kind of scheduler ? for switching between
sessions ??

[bino] Conceptually no scheduler is needed, the RTP stack can work based
on the event from Media Layer & Transport Layer. 

2)While reciving RTP packets i'm buffering it in a recvBuffer (using our

own buffer management routines), i.e whenever i get a packet i'll add it

into the queue, for re-arranging the packets can i use some sorting 
algorithms on sequence number, or should i make timestamp the key for 
sorting ?
Note : I'm planning to have seperate recvBuffer for each sessions.

[Bino]: If you use TS as indexing, you have to think about handling
Silence period. From my experience Sequence number is more suitable. 

3)While sending RTP packets weather i've to buffer it or directly send 
the packets to udp sockets ?
[bino]: Based on your Media Layer, you may have to buffer RTP Payload.
Once the RTP packet is completed, you have to send it fast, to reduce
the Tx Delay. 

4)Weather i've to create some scheduler that informs the application in 
regular intervals about the received RTP packets, so that the 
application can use the data.
[bino]: There should be an interface required between RTP stack & Media
layer to transfer Payload and the Rx Delay must be minimum in this path.


Waiting for your answers,

[bino]: Please refer well know Applications like LinPhone, RAT(Robust
Audio Visual Tool) for further reference. 
Regards,
Lavin


_______________________________________________
Audio/Video Transport Working Group
avt at ietf.org
https://www1.ietf.org/mailman/listinfo/avt


_______________________________________________
Audio/Video Transport Working Group
avt at ietf.org
https://www1.ietf.org/mailman/listinfo/avt