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SubjectRe: Turning lucent winmodem into soundcard
Thomas Sailer wrote:
> Put your driver into the kernel. I'd suggest an interface similar
> to the current soundcard interface, plus ioctl's to handle
> phone line specifics, like hangup etc.

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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