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Re: [Linphone-developers] [Q] Differences between 1.0.1 and 1.1.0 ?

From: Simon Morlat
Subject: Re: [Linphone-developers] [Q] Differences between 1.0.1 and 1.1.0 ?
Date: Wed, 14 Sep 2005 17:03:19 +0200
User-agent: KMail/1.8.2


I had problems with g729 because it uses 10 ms frames, while the mediastreamer 
timer ticks every 20 ms. I solved the problem by setting the timer at 10 m, 
in mstimer.c at the begginning of the file:
and it works.
Try that.
Remember that linking linphone to a proprietary library is something 
"dangerous", the GPL isn't compatible with such proprietary softwares.
As I do not encourage people to do that, I will not merge your patch into the 
main tree.
However in 1.2.0 branch I 've added a plugin mechanism, every library in 
$prefix/lib/linphone/mediastreamer/plugins/ will be loaded by linphone at 
startup. This makes easier the possibility to distribute plugins for linphone 
that add new codecs, new sound support (esd, artsd ?).

People can also use this to try non-free plugins that link to proprieraty and 
patented libraries, I'll not sue people for that, but remember this is 

I prefer encouraging people and companies to throw away all those G.72* stuff 
and prefer gsm, speex or ilbc.


Le Mardi 13 Septembre 2005 11:54, Clement Chen a écrit :
> Hi,
>  Recently I added G.729A support for linphone-1.0.1 taking advantage of
> ITU's G.729 anex C (floating-point) implementation.
> I compiled both the coder and decoder as ".so" shared library files, and
> then wrote the wrappers like what others (ulaw, alaw, etc.) look. In the
> wrapper, I use "dlopen", "dlsym", and "dlclose" APIs to utilize those APIs
> in the shared libraries. Verifying the results with other phones that
> support G.729, it does work well.
>   Since this patch is quite clean and simple, I tried to apply it to the
> latest linphone-1.1.0 package. Although linphone was compiled successfully,
> I soon found that the voice quality of G.729 with 1.1.0 package became
> wierd. Checking the RTP packets, I was surprised that the RTP payloads
> generated by 1.1.0 differed from those generated by 1.0.1 with the same raw
> .wav file (hello8000.wav).
>   It seems changes from 1.0.1 to 1.1.0 result to such differences, but I
> have no idea what can be wrong. Maybe the new compile options ?
>   Attached is my patch for the codec support for 1.1.0 without those shared
> libraries. (For 1.0.1, avprofile.c requires extensions for this codec)
>  BTW, ms OS is RedHat Linux FC3 (2.6.9-1.667)
>   Any comment is appreciated and welcome. *^_^*
>  Thanks,
>  Clement.

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