[Spice-devel] [PATCH spice] Provide thread safety between spice_server_playback_put_samples and snd_set_playback_latency.

[Jeremy White]

>> Yes, that may be possible.  There are some tricks with the timing that
>> may make that challenging (e.g. we need to feed audio at regular
>> intervals).  I also have the sense that the original implementation was
>> done that way, and we changed to this approach for some good reason that
>> I can not currently recall :-/.
>>
>> I will dig a bit deeper and report back.

It took a bit of doing, but a non threaded version does appear to work; 
see related patch.

There are some timing gotchas when using pulse fifos to feed audio which 
Andrew had papered over using threads and sleeps; it took some work to 
explicitly work that in in watches and waits, but it seems to work.

Cheers,

Jeremy