help with linphonerc: soundcard

[lostpacket]

Hello,
I'm attempting to get linphone working on the RT-N66U running Asuswrt-Merlin, Version 3.0.0.3.178.15.

linphonec complains:

"ALSA lib confmisc.c:768parse_card) cannot find card '0'
"
(followed by 10-15 similar ALSA related errors)

Of course, there's no sound card on this router
Q. How to configure .linphonerc so that this doesn't happen?

Is it possible to create a "dummy" sound card device?

Has anyone got SIP working under Asuswrt-Merlin?

The main thing I'd like to accomplish is to establish a direct IP to IP SIP call.

Any help is appreciated!

 

[RMerlin]

There is no speaker and no microphone on your router, so what audio input/output are you expecting the program to use?

 

[lostpacket]

> what audio input/output are you expecting the program to use?
I was expecting to direct incoming audio data to /dev/null, and output audio from some .wav file.

linphonec offers a couple of ways to do this, specifically:
soundcard use files
play /tmp/myoutput.wav
record /tmp/myinput.wav
(or)
record /tmp/null

an alternative approach - possible with other Linux distributions - is to define a "dummy" ASLA device:
see: http://www.alsa-project.org/main/index.php/Matrix:Module-dummy
One would then specifiy the "dummy" device ID in .linphonerc with: "capture_dev_id=my-null-dev-id" (there's also a "playback_dev_id" parameter).

The latter solution would solve the problem described in OP, but assumes the availability of some "module" related daemon or "subsystem" which, apparently, isn't present (search "Modinfo soundcore"). Maybe I can install it, maybe it's completely unrealistic to pursue this - I was hoping for some perspective...

Considering "SIP" returns no search-hits in this forum, it might be nice to get a SIP project working - even if it's not Linphone based...

 

[RMerlin]

I think it would add too much to the firmware size for the very limited number of users who might use it. I'd recommend taking a look at Optware or Entware, they might provide you with the necessary components to do what you want, saving those extra files on a USB disk instead of inside the limited firmware flash space.

It could also be possible for someone to compile the modules, and put them on a USB disk, using a script to insmod them as needed.

 

[lostpacket]

Re: loading compiled modules off USB - Thanks for the ideas.

It seems (just noticed) there's a dd-wrt rev. (from Fractal) that addresses the 64k nvram issue. Hopefully there are some dd-wrt/SIP examples to draw from.

Thank you for Asuswrt-Merlin. For the last few months your firmware build resurrected the router as a useful development platform - thanks!