[LAD] Realtime inter-thread communication

[Len Ovens]

On Mon, 29 Feb 2016, Sebastian Gesemann wrote:

> I've started writing a software synthesizer in C++ (using SDL2 for
> now) for kicks and giggles and ran into the problem of having the
> event loop thread that listens for keyboard events communicate with
> the audio callback.
>
> Are there any recommendations for how to pass real-time events (note
> on, note off, etc) to such an audio callback? I figured, this is
> already a solved problem and that I could benefit from your
> experiences. Maybe you know of some nice open-source C++ queue
> implementation that is suitable in such a situation.

I have used jackd ringbuffer for that.

If you don't want to link against jack you could probably pull the code 
out to use in your application. the ring buffer is a polled setup, so 
every time you do some audio processing you need to check the ring buffer 
to see if there are any new bytes to process.

--
Len Ovens
www.ovenwerks.net