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In order to get a dump of the running process, we need to find the pid of the main asterisk process. This can be tricky if there are also instances of "asterisk -r" running or if an alternate location for asterisk.conf was specified on the command line with the -C option that also specified an alternation location for the pid file. So now... 1. We find the asterisk executable with "which" or the --asterisk-bin command line option. 2. If there's only 1 process with an executable path that matches, we use that pid. If not... 3. We try "<asterisk-bin> -rx 'core show settings'" and parse the output to find the pidfile, then read that for the pid. If that didn't work... 4. We get a list of all the pids matching <asterisk-bin> and look in /proc/<pid>/cmdline for a -C argument and retry the "core show settings" using the same -C option. We can't parse the output of "ps" to get the -C path because it may contain spaces. The contents of /proc/<pid>/cmdline are delimited by NULLs. For BSDs we may have to mount /proc first. :( ASTERISK-28221 Reported by: Andrew Nagy Change-Id: I8aa1f3f912f949df2b5348908803c636bde1d57c
app_festival is an application that allows one to send text-to-speech commands
to a background festival server, and to obtain the resulting waveform which
gets sent down to the respective channel. app_festival also employs a waveform
cache, so invariant text-to-speech strings ("Please press 1 for instructions")
do not need to be dynamically generated all the time.
You need :
1) festival, patched to produce 8khz waveforms on output. Patch for Festival
1.4.2 RELEASE are included. The patch adds a new command to festival
(asterisk_tts).
It is possible to run Festival without patches in the source-code. Just
add this to your /etc/festival.scm or /usr/share/festival/festival/scm:
(define (tts_textasterisk string mode)
"(tts_textasterisk STRING MODE)
Apply tts to STRING. This function is specifically designed for
use in server mode so a single function call may synthesize the string.
This function name may be added to the server safe functions."
(let ((wholeutt (utt.synth (eval (list 'Utterance 'Text string)))))
(utt.wave.resample wholeutt 8000)
(utt.wave.rescale wholeutt 5)
(utt.send.wave.client wholeutt)))
[See the comment with subject "Using Debian
festival >= 1.4.3-15 (no recompiling needed!)" on
http://www.voip-info.org/wiki-Asterisk+festival+installation for the
original mentioning of it]
2) You may wish to obtain and install the asterisk-perl
module by James Golovich <james@gnuinter.net>, from
either CPAN, or his site: http://asterisk.gnuinter.net,
as this contains a good example of how variable text
can be tts'd via asterisk, namely the examples/tts-*.agi
files there. It has been noted that the current expression
evaluation capabilities of asterisk are not best suited
for the generation and manipulation of text. AGI scripting
can be ideal for these sorts of needs. For simpler usage,
fixed, pre-recorded messages may be more amenable for your
purposes.
3) Before running asterisk, you have to run festival-server with a command
like :
/usr/local/festival/bin/festival --server > /dev/null 2>&1 &