Re: [Discuss-gnuradio] initial gr-audio-portaudio

[Robert McGwier]

Ok.  This is closer.  I get a few buffers,  almost 1 second and then it 
goes off the deep end but that is better than before when all I could 
get was segmentation fault!

I will look at the callback interface, etc.  to see if I see anything.  
I already know this pa works because I am using it with wsjt.

Bob


Stephane Fillod wrote:
> On Mon, Mar 13, 2006 at 03:52:25PM +0100, Martin Dvh wrote:
> [..]
>   
> > > The code should be portable. I was missing the native Win32 call for
> > > mutex_trylock, so someone will have to find it, and define
> > > OMNI_MUTEX_TRYLOCK_IMPLEMENTATION in src/lib/omnithread/ot_nt.h,
> > > with appropriate semantic (return value).
> > >       
> > I think you can do this with TryEnterCriticalSection
> >     
>
> It does fit indeed. It has just been checked in.
>
> Bob, Thomas, please cvs update gnuradio-core AND gr-audio-portaudio at
> same time since I changed the logic of omni_mutex::trylock (returns true
> if it grabbed the lock), in order to comply with comment in omnithread.h.
>
>   
> > You could also use the omni_semaphore class defined in 
> > gnuradio-core/src/lib/omnithread/nt.cc
> > This latter one uses CreateSemaphore and WaitForSingleObject with some wrapper 
> > code.
> > (you probably have to change all defines if you change to using omni_semaphore)
> >     
>
> The gr-audio-portaudio code is using omni::mutex and omni::cond calls. 
> Actually, they are not used for mutual exclusion, but simply as a
> notification mean (there's more room/there's more data in the ringbuffer).
>
>
> Good Lu*k Martin for your presentation. We can wait next week to see whether
> James Brown sounds even better with gr-audio-portaudio under Windows ;-) 
>
>   


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