[Stk] Nifty ALSA Runtime Error!

[Gary P. Scavone]

Hi Wes,

RtWvOut uses RtAudio underneath it.  The issue here is that rtsine  
uses a blocking audio scheme while crtsine uses a callback scheme.   
My guess is that the problem has to do with the priority of the  
callback thread.

In RtAudio, search for "pthread_attr_setschedpolicy(&attr,  
SCHED_RR);" and change the SCHED_RR to SCHED_OTHER.  Make sure you  
are in the RtApiAlsa section of the code.

Regards,

--gary

On 8-Feb-06, at 4:25 PM, Wesley John-Alder wrote:

> Hey guys!
>
> I'm new to this list as well as to Stk.  I'm currently working on a  
> school project with Stk, and I'd like my project to be as cross- 
> platform as possible (Windows might make things difficult).   
> Anyway, I have gotten some files (including the example projects)  
> to compile on every system I use (i386-linux, powermac, and powerpc- 
> linux).  On the powerpc-linux system that I have tried, I can  
> compile and run real-time programs such as rtsine without any  
> difficulty.  However, when I try running crtsine I get the  
> following error message:
>
> RtApiAlsa: error starting callback thread!
>
> The only difference that I noted was that rtsine uses an RtWvOut  
> class, and crtsine uses an RtAudio class.  Again, I have never used  
> Stk before, so any insight that people may have pertaining to my  
> problem will be much appreciated.  Thanks!
>
>
> wes
>
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