[BRLTTY] Build brltty with support for espeak-ng

[Nicolas Pitre]

On Sun, 8 Dec 2019, Dave Mielke wrote:

> [quoted lines by Nicolas Pitre on 2019/12/08 at 12:39 -0500]
> 
> >Still, isn't there a "speech finished" event received upon sending a mute() ?
> 
> Sure, but not in this case. That's how it used to work, but it was too slow
> (when, in addition to mute first, we add in speak punctuation and use a
> different pitch for uppercase) so the say request was enhanced and it's now all
> bundled together.

What I'm actually suggesting is to verify if the eSpeak-NG's 
SynthCallback() is invoked with espeakEVENT_MSG_TERMINATED or not within 
a reasonable time after using espeak_Cancel() when those spoken long 
lines are not interrupted as expected.


Nicolas