Re: [Linphone-users] RTP for Linphone

[beni mahler]

Hello all,

> I am working on PowerPC platform and intend to use Linphone SIP UA on 
> it. I have cross complied the libosip and linphone source code for 
> PowerPC and able to establish the SIP dialog through a remote machine. 
> Now I want to setup the RTP at my platform. I have to modify the oRTP 
> in a way that it sends out the voice data not to the sound card but to 
> the PCM codec interfaced to the serial port. I am not clear exactly 
> which part in oRTP source code should be modified for this. Can 
> somebody throw light on the flow and architecture of RTP and the 
> purpose of the functions used? I will also need to write a small 
> driver for the PCM codec. Further, is the voice data from Linphone 
> compatible to be directly given to PCM codec? Which part of the 
> Linphone performs the coding of voice?
check the mediastreamer dirs. there are mulawenc.c et cetera for any 
codec you could use in linphone. i do have to do a similar thing. i will 
just try to have the data not coded but written in pcm to the output in 
msMUlawenc.c.
i think the linphone pcm data will be soundcard pcm data...

> Thanks & Regards,
> Renu
>
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