RE: [Iaxclient-devel] Re: [Asterisk-Users] IAX2 protocol

[Shawn L. <sha...@te...>]

As Steve has said, I have been working with the libiax code in the last
little while and working towards a new cross-platform client for IAX.  I
just got a chance to read the notes being sent back and forth on IAX2 and
thought I'd add a couple things to the discussion.

>That sounds good also; indeed the changes you've outlines sound really
>good -- my plan for iaxclient is first to address the architectural
>things that are necessary to make the code portable and functional, and
>then we would re-investigate quality and performance issues.  In that
>area, voice quality of course will be paramount, and that's a key focus
>of your proposal (re-working jitter buffer and retransmissions, etc).
I was playing with the winiphone program (the console app in the libiax
library) and the client did work as it stands.  I managed to get a client
compiled with VC 6 that ran on Win9x/2k/XP.  However, the sound was fairly
lagged in some cases and typing anything in on the command line caused the
audio to drop out.  I am working on tweaking the performance of the current
library and then will evolve things from there.
> Although I like the libiax interface, the implementation needs a lot of
> work (especially on the number of malloc() calls).  I'd like to encourage
> you to work with us to make sure that when we rework libiax that it fits
> with your needs as well, and also to be sure that any features you need in
> IAX2 get implemented now during the design phase.

>I think Shawn is working with the code now, and I haven't seen what he's
>done so far.  Our goals, from a high-level, are pretty well defined on
>the website;  Initially, our goals are focused on portability, and
>robust operation.  On the features side, we don't have initial needs
>other than to be able to work like an AT&T 2500 telephone set; just make
>a single, reliable voice call into an * system.
I agree that there are some things that could be done to improve the
implementation.  I am definitely open to working with you to get some
feedback and some help with the changes to the implementation. I would also
be interested in doing some of the libiax implementation rework as part of
the work we're doing with this project.  If it will help us achieve our goal
of getting a single, reliable voice call in and out of an asterisk system,
then I'm game for it.

If notes or documentation on the structure of IAX (or the upcoming IAX2) are
available, would it be possible to look at the information?  I think it
would give me a more in depth understanding on the protocol and how the
current libiax implementation provides the IAX service to software outside
of Asterisk.  I have a lot of different ideas going through my head, but I
like to know more about things before I say much about whether these ideas
would be beneficial or not.

Anyways, that's my two cents worth at this point.  Shawn


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