Re: [Linphone-developers] Audio Flow

[Sushma Natarajan]

Thanks Simon. I was wondering if any one on the mailing list has developed code for an independant Vocoder hardware and would not have problems sharing it with me? I looked at the file alsa.c but am having trouble understanding it. I would appreciate it if anyone can help me out here.
Thanks,Sushma

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From:  Simon Morlat <address@hidden>
To:  address@hidden
CC:  "Sushma Natarajan" <address@hidden>
Subject:  Re: [Linphone-developers] Audio Flow
Date:  Mon, 25 Jun 2007 16:18:16 +0200
>Hi,
>
>All you need is to implement a "SndCard" object for your hardware, just as
>what is done in mediastreamer2/src/alsa.c .
>
>Simon
>
>Le Friday 22 June 2007 16:26:26 Sushma Natarajan, vous avez écrit :
> > Hi,
> > I am using Linphone for ARM but dont have any soundcards. I want to instead
> > use an independant vocoder hardware. I get the following warnings when I
> > type linphonec on the console cdma-linux # linphonec
> > Warning:No sound cards found !
> > Warning:Cannot open directory /lib/linphone/plugins/mediastreamer: No such
> > fil e or directory
> > Warning:Sound card with index 0 does not exist.
> > Warning:Sound card with index 0 does not exist.
> > Warning:Sound card with index 0 does not exist.
> > linphonecore.c:1538- assertionsndcard!=NULLfailed
> > linphonecore.c:1530- assertionsndcard!=NULLfailed
> > linphonecore.c:1547- assertionsndcard!=NULLfailed
> > linphonecore.c:1661- assertionsndcard!=NULLfailed
> > Message:Adding new codec PCMU/8000
> > Message:Adding new codec GSM/8000
> > Message:Adding new codec PCMA/8000
> > Message:Adding new codec speex/8000
> > Message:Adding new codec speex/16000
> > Message:Adding new codec 1015/8000
> >  
> > All of this makes sense as I dont have any soundcards. I wanted to know if
> > anyone has the audio flow mapped out to help me out here. I basically need
> > hooks when I receive the RTP after linphone goes to the Connected state -
> > so as to route the RTP to the Vocoder hardware. Is the function
> > ms_rtp_recv_process? When I try to trace I am not sure what happens after
> > linphone_core_start_media_streams is called. How is ms_rtp_recv_process
> > called? Please help me out.
> > Thanks,
> > Sushma
>
>