Re: [Linphone-developers] Audio Flow

[Simon Morlat]

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