[Linphone-developers] Re: Bad audio quality for linphone on Bulverde PXA270

[Doug Blewett]

Ojas,

>From the note below, I had very similar problems
- delay and chopped audio.  I posted earlier about
my patch for fixing the delay in OSS based systems.
That is pretty easy mainly add the fragment buffer
allocation and always return from oss open with a
512 byte buffer.  I can send you my patched osscard.c
files or patches.

My system also had timestamps that did not work 
well with the rtpparse.c and rtpmod.c.  I just
commented out the timestamp catchup code - until
I can get back to seeing what was actually going
on.  I can also send you those if you want.  That
fixed all of the chopping audio problems - now
sounds great.

The patch I posted a few days ago will greatly
reduce delay through the oss code.  Probably a
good thing to do.

Doug


Date: Mon, 11 Jul 2005 12:30:37 +0530
From: Ojas Pipalia <address@hidden>
Subject: [Linphone-developers] Bad audio quality for linphone on
        Bulverde        PXA270
To: address@hidden
Message-ID: <address@hidden>
Content-Type: text/plain; charset=ISO-8859-1

Hi,

I have installed linphone-1.0.1 on Bulverde PXA270 board alongwith
libosip2-2.2.0 and speex-1.1.8.There are no problems cross-compiling
the application but when I run the application linphonec(console
version)
and try talking with linphonec on a normal linux machine (with
alsa-drivers) the audio quality is very poor.Ringing on both sides
goes well but while talking I get cutted and heavy voice along with
some delay.I do not have alsa-drivers installed on the board but have
them on the linux machine.

Is this the real problem of not having alsa-drivers on the board?
or something else is creating the problem?

How can I install alsa-drivers on the board?
Is it really needed?

Can anyone throw any light on this?


Regards,
Ojas