Thanks to everyone on this post. I have learned a lot! I have come up with a different approach and not reliant on the modules Text to Speech engine or Text to Speech application. Using the dialplan + PHP
You still need an Amazon account. And node.js
Kudos to @jersonjunior!
Sample project to demonstrate usage of the AWS SDK for Node.js:
cd /opt/
git clone https://github.com/awslabs/aws-nodejs-sample
cd aws-nodejs-sample
npm install
npm install optimist
npm install child_process
nano script.js
#!/usr/bin/env node
// Load the SDK
var argv = require('optimist').argv;
const AWS = require('aws-sdk')
const Fs = require('fs')
var child_process = require('child_process');
// Create an Polly client
const Polly = new AWS.Polly({
accessKeyId: "youraccessKeyIdgoeshere",
secretAccessKey: "yoursecretAccessKeygoeshere",
signatureVersion: 'v4',
region: 'us-east-1'
})
letparams = {
'Text': argv.text,
'OutputFormat': 'mp3',
'SampleRate': '8000',
'VoiceId': 'Joanna'
}
Polly.synthesizeSpeech(params, (err, data) => {
if (err) {
console.log(err.code)
} else if (data) {
if (data.AudioStream instanceof Buffer) {
Fs.writeFile(argv.mp3, data.AudioStream, function(err) {
if (err) {
return console.log(err)
}
console.log("The file was saved!")
var output = child_process.execSync('lame --decode ' + argv.mp3 + ' ' + '-b 8000' + ' ' + argv.wav + '.wav');
})
}
}
})
Press ctrl+x y enter to save and exit
nano /var/lib/asterisk/agi-bin/pollysimple.php
#!/usr/bin/php -q
<?php
// [polly-simple]
set_time_limit(30);
require('phpagi.php');
$agi = new AGI();
$agi->answer();
$text= "Hello, this is a test of Amazon Polly. Change this text to hear something different.";
$id= uniqid();
shell_exec("node /opt/aws-nodejs-sample/script.js --mp3=/tmp/polly-$id.mp3 --text='$text' --wav=/tmp/polly-$id");
$agi->stream_file("/tmp/polly-$id");
$mp3file = "/tmp/polly-$id.mp3";
unlink($mp3file) or die("Couldn't delete file"); //deletes mp3 file
$wavfile = "/tmp/polly-$id.wav";
unlink($wavfile) or die("Couldn't delete file"); //deletes wav file
exit();
?>
Press ctrl+x y enter to save and exit
Now we have to change permissions:
cd /var/lib/asterisk/agi-bin/
chown asterisk:asterisk pollysimple.php
chmod +x pollysimple.php
Now to put it all together:
Freepbx gui: Admin -> Config Edit -> extensions_custom.conf:
[from-internal-custom]
;internal extension of [polly-simple]
exten => 400,1,Goto(polly-simple,s,1)
;can be referenced by creating a Custom Destination
;Target= polly-simple,s,1
;Description= A simple Amazon Polly test
[polly-simple]
exten => s,1,Answer()
exten => s,n,AGI(/var/lib/asterisk/agi-bin/pollysimple.php)
exten => s,n,Hangup()
Click Save and Apply
Calling extension 400 will play the text in pollysimple.php if everything went ok.
The temp files are deleted.
Creating a Custom Destination is optional. Unless you want to use it in another application.
Good luck! Let me know if you come across any issues.
–Adam