[asterisk-users] info on : CONFIG_VOICEBUS_ECREFERENCE

[upendra]

Hi ,


it implies that under this CONFIG_VOICEBUS_ECREFERENCE code inside this
condition will never execute.
if we need it should be defined .


Regards
Upendra

On Tue, Nov 20, 2012 at 8:55 PM, Shaun Ruffell <sruffell at digium.com> wrote:

> On Tue, Nov 20, 2012 at 05:18:12PM +0530, upendra wrote:
> > Hi,
> >
> > just going through the code i found that this
>  CONFIG_VOICEBUS_ECREFERENCE
> > undef in the voicebus then how it will defined to run the echo cancell on
> > the respective  drievers wctdm24xxp ??
> >  explain how this  CONFIG_VOICEBUS_ECREFERENCE  enabled and where it is
> > enabled while run time.
>
> It's a compile time option that was in added to the code for testing
> in certain environments [1]. It doesn't enable / disable the
> echocanceler, but instead changes the default processing to provide
> a more accurate reference signal when latency grows large.
>
> [1] http://svnview.digium.com/svn/dahdi?view=revision&revision=9144
>
> If you would like to use it for some reason, in
> drivers/dahdi/voicebus.h change "#undef CONFIG_VOICEBUS_ECREFERENCE"
> to "#define CONFIG_VOICEBUS_ECREFERENCE".
>
> In practice, I've found that it's generally better to fix what on
> the system is causing latency to grow so large instead of enabling
> that option.
>
> Cheers,
> Shaun
>
> --
> Shaun Ruffell
> Digium, Inc. | Linux Kernel Developer
> 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
> Check us out at: www.digium.com & www.asterisk.org
>
> --
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