Re: [Iaxclient-devel] codec support

[Adam H. <ad...@te...>]

Mark Spencer wrote:

>>2.  How to negotiate codecs over IAX2
>>    
>>
>
>This part I can actually comment on.  Whereas SDP based systems list
>codecs in the order desired, IAX2 has a simpler (but arguably less
>flexible) system for doing the codec negotiation, which is that the caller
>specifies two things -- a preferred format and a mask of its capability.
>Then the server being called responds back with a specific format it
>wishes to use.  In principle, you can switch codecs to anything that is
>within the end device's capability.
>
>  
>
People may want to look at my mod to libiax2 (firefly's version), I've 
seperated preferred format and the mask into two params in iax_call

>>I wonder if there is a way to create a commercial G.729 plug-in that can be
>>sold via Digium?  If we have a common codec interface that is common across
>>all clients, couldn't we create a standard binary dynamic link format for
>>each platform (x-nix, Windows, Mac) and ask Digium to sell the plug-ins?
>>    
>>
>
>We could look at this as a possibility, but I need to find a new G.729
>provider first, as Voiceage's code is basically crap (in particular their
>brain-dead copy protection), and they are absolutely most miserable,
>untrustworthy, and irresponsible company i've ever had to deal with, so
>the last thing I want to do is create another product involving them.
>
>  
>
I've created a g729 plugin for firefly but licensing it from sipro is 
yet to come :|  Voiceage = sipro so sounds like I'm in for some fun. 
When we license it, I'm happy for us to sell it as a plugin (ie dll) and 
you could use it with iaxcomm. I'd have to implement some kind of 
security sheme (I assume?) but it should be a simple http request and reply.

thoughts?

-Adam