=============================================
       Google TTS script for Asterisk
=============================================

This script makes use of Google's translate text to speech service
in order to redner text to speech and play it back to the user.
It supports a variety of different languages.

------------
Requirements
------------
Perl         The Perl Programming Language
perl-libwww  The World-Wide Web library for Perl
sox          Sound eXchange, sound processing program
mpg123       MPEG Audio Player and decoder
Internet access in order to contact google and get the voice data.

------------
Installation
------------
To install copy googletts.agi to your agi-bin directory.
Usually this is /var/lib/asterisk/agi-bin/
To make sure check your /etc/asterisk/asterisk.conf file

-----
Usage
-----
agi(googletts.agi,"text",[language],[intkey],[speed]): This will invoke the Google TTS
engine, render the text string to speech and play it back to the user.
If 'intkey' is set the script will wait for user input. Any given interrupt keys will
cause the playback to immediately terminate and the dialplan to proceed to the
matching extension (this is mainly for use in IVR, see README for examples).
If 'speed' is set the speech rate is altered by that factor (defaults to 1.2).

The script contacts google's TTS service in order to get the voice data
which then stores in a local cache (by default /tmp/) for future use.
Parameters like default language, enabling or disabling caching and cache dir
can be set up by editing the script.

--------
Examples
--------
sample dialplan code for your extensions.conf

;GoogleTTS Demo
;PLayback messages to user

exten => 1234,1,Answer()
    ;;Play mesage in English:
exten => 1234,n,agi(googletts.agi,"This is a simple google text to speech test in english.",en)
    ;;Play message in Spanish
exten => 1234,n,agi(googletts.agi,"Esta es una simple prueba en español.",es)
    ;;Play message in Greek
exten => 1234,n,agi(googletts.agi,"Αυτό είναι ένα απλό τέστ στα ελληνικά.",el)

;A simple dynamic IVR using GoogleTTS

[my_ivr]
exten => s,1,Answer()
exten => s,n,Set(TIMEOUT(digit)=5)
exten => s,n,agi(googletts.agi,"Welcome to my small interactive voice response menu.",en)
    ;;Wait for digit:
exten => s,n(start),agi(googletts.agi,"Please dial a digit.",en,any)
exten => s,n,WaitExten()

    ;;PLayback the name of the digit and wait for another one:
exten => _X,1,agi(googletts.agi,"You just pressed ${EXTEN}. Try another one please.",en,any)
exten => _X,n,WaitExten()

exten => i,1,agi(googletts.agi,"Invalid extension.",en)
exten => i,n,goto(s,start)

exten => t,1,agi(googletts.agi,"Request timed out.",en)
exten => t,n,goto(s,start)

exten => h,1,Hangup()

-------------------
Supported Languages
-------------------
Afrikaans:          af
Albanian:           sq
Amharic:            am
Arabic:             ar
Armenian:           hy
Azerbaijani:        az
Basque:             eu
Belarusian:         be
Bengali:            bn
Bihari:             bh
Bosnian:            bs
Breton:             br
Bulgarian:          bg
Cambodian:          km
Catalan:            ca
Chinese Simplified: zh-CN
Chinese Traditional:zh-TW
Corsican:           co
Croatian:           hr
Czech:              cs
Danish:             da
Dutch:              nl
English:            en
Esperanto:          eo
Estonian:           et
Faroese:            fo
Filipino:           tl
Finnish:            fi
French:             fr
Frisian:            fy
Galician:           gl
Georgian:           ka
German:             de
Greek:              el
Guarani:            gn
Gujarati:           gu
Hacker:             xx-hacker
Hausa:              ha
Hebrew:             iw
Hindi:              hi
Hungarian:          hu
Icelandic:          is
Indonesian:         id
Interlingua:        ia
Irish:              ga
Italian:            it
Japanese:           ja
Javanese:           jw
Kannada:            kn
Kazakh:             kk
Kinyarwanda:        rw
Kirundi:            rn
Klingon:            xx-klingon
Korean:             ko
Kurdish:            ku
Kyrgyz:             ky
Laothian:           lo
Latin:              la
Latvian:            lv
Lingala:            ln
Lithuanian:         lt
Macedonian:         mk
Malagasy:           mg
Malay:              ms
Malayalam:          ml
Maltese:            mt
Maori:              mi
Marathi:            mr
Moldavian:          mo
Mongolian:          mn
Montenegrin:        sr-ME
Nepali:             ne
Norwegian:          no
Norwegian Nynorsk:  nn
Occitan:            oc
Oriya:              or
Oromo:              om
Pashto:             ps
Persian:            fa
Pirate:             xx-pirate
Polish:             pl
Portuguese:         pt
Portuguese Brazil:  pt-BR
Portuguese Portugal:pt-PT
Punjabi:            pa
Quechua:            qu
Romanian:           ro
Romansh:            rm
Russian:            ru
Scots Gaelic:       gd
Serbian:            sr
Serbo-Croatian:     sh
Sesotho:            st
Shona:              sn
Sindhi:             sd
Sinhalese:          si
Slovak:             sk
Slovenian:          sl
Somali:             so
Spanish:            es
Sundanese:          su
Swahili:            sw
Swedish:            sv
Tajik:              tg
Tamil:              ta
Tatar:              tt
Telugu:             te
Thai:               th
Tigrinya:           ti
Tonga:              to
Turkish:            tr
Turkmen:            tk
Twi:                tw
Uighur:             ug
Ukrainian:          uk
Urdu:               ur
Uzbek:              uz
Vietnamese:         vi
Welsh:              cy
Xhosa:              xh
Yiddish:            yi
Yoruba:             yo
Zulu:               zu

-------
License
-------
The GoogleTTS script for asterisk is distributed under the GNU General Public
License v2. See COPYING for details.

--------
Homepage
--------
http://zaf.github.com/asterisk-googletts/