I plan to do something much like that. An auxiliary streaming channel
is required for things like dial/busy tone detection, because I've found
(non-RT) user space scheduling isn't fine grained enough for simple "is
there a tone now?" questions to distinguish different patterns. At
least, according to certain country-specific parameters.
> The realtime guarantees should be ok when using what the kernel
> already provides (mlock, sched_setscheduler), as long as it
> can control when exactly a waveform gets transmitted. It
> can do this by sending the right amount of zero samples
> to the soundcard aka modem :)
Of course ;-)
-- Jamie
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