releasing sound card

Hi, Julian --

I could be wrong, but I'm pretty sure that mediastreamer
only opens the sound card when 
there's audio to play. I've had instances where my sound
card wasn't getting initialized, 
but linphone didn't throw any errors until it tried to ring
for an incoming call.

What sound card are you using on your blackfin board? If
you're using the AD1980/AD1981, 
ADI has recently added MMAP support to the distro and kernel
so that DMIX can be used to 
handle multiple connections to the same sound card.

Regards,
Cameron



Jay Woo wrote:
> Hello,
> I came accross a problem during development of an
application, that uses 
> linphone api for voip communication (uCLiniux on
Blackfin board). The 
> issue is as follows:
> during initialization Linphone opens a soundcard device
(/dev/fsk) and 
> releases it as linphone core object is destroyed.
> There is another part of the application uses /dev/fsk
as well (only 
> when linphone is idle) and requires exclusive access to
it to issue some 
> ioctl. What I need is to find some way to make linphone
open /dev/fsk 
> only when it is about to use it (when conversation is
about to begin) 
> and release the handle as soon as the rtp session ends.
Of 
> course I could close the whole linphone core, but I
want it to keep 
> listening for incoming sip calls.
> My question: is there any straightforward method to do
this (without 
> modifying linphone source) just by calling some
functions from 
> linphonecore.c like sound_config_uninit, etc.
>  
> Thanks in advance for even mere suggestions.
>  
> Julian
> 
> 
>
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