[Jack-Devel] Why frame sizes are limited to the powers of 2?

[Yuri]

On 07/26/2017 00:35, Filipe Coelho wrote:
>
> So some of those buffer sizes work, some do not.
> GUIs usually show only power of 2 values because they're safer to use 
> (I mean, more likely to actually work).
> Also some jack applications sadly were made with the expectation that 
> power-of-2 buffer sizes will be used...
> But for such cases the application can return an error on start and 
> during the jack-buffersize-callback, to force jack to be under 
> power-of-2 sizes.
>
> Anyway, at least in latest jack2 this is not a problem.
> Not sure about jack1, but I believe the same is true. 


I use Jack1. power of 2 check is hardcoded in the server.

 >        if (!jack_power_of_two (nframes)) {
 >                jack_error ("buffer size %" PRIu32 " not a power of 2",
 >                            nframes);
 >                return EINVAL;
 >        }

Yuri