[asterisk-dev] MMX in Zaptel

[Eric "ManxPower" Wieling]

Trevor Peirce wrote:
> Tzafrir Cohen wrote:
>> Reminder: zconfig.h includes a defina called CONFIG_ZAPTEL_MMX,
>> undefined by default, to enable/disable MMX support in Zaptel. It also
>> warns of problems with various CPUs.
>>   
> This worries me a bit. I've never been able to have zaptel act in a 
> stable manner when I enable this on an Intel(R) Celeron(R) CPU 1.70GHz. 
> There's another celeron I've tried it on as well where I have not had 
> success.
> 
> When enabling MMX I'd hear all sorts of weird sounds and distortions in 
> conversations. Disabling MMX and all was fine. The last time I tried to 
> use MMX was sometime around June/July with both the 1.2 and 1.4 releases.
> 
> I don't have any more information to provide other than it doesn't seem 
> to work with Celerons, even though they say they support MMX.

For some reason I thought MMX Optimizations in Asterisk only applied to 
the GSM codec.