IvonaAGI.php

<?php 


class IvonaAGI extends AGI {
    private $tmp = '/tmp';
    private $sox = '/usr/bin/sox';
    private $mpg123 = '/usr/bin/mpg123';
    private $enableDebug =1;
    private $format = null;
    private $codec = null;
    private $samplerate = null;
    private $speed = 'slow';
    private $lang  = 'en-GB';
    private $voice = 'Amy';
    public function __construct()
    {
	parent::__construct();
	$this->debug(__METHOD__." Created instance of ".__CLASS__);
    }


    private function debug($message)
    {
	if ($this->enableDebug){
		syslog(LOG_DEBUG, $message);
	}

    }



    public function say_tts($text, $lang = null, $voice = null, $speed = null, $noanswer=null)
    {
	$ivona = new IvonaClient();

	//$ivona->ListVoices("pl-PL", null);
	if(!$lang){
		$lang = $this->lang;
	}
	if(!$voice){
		$voice = $this->voice;
	}
	if(!$speed){
		$speed = $this->speed;
	}	
	$filename = $ivona->getSave($text, array('Language' => $lang, 'VoiceName'=>$voice, 'VoiceRate'=>$speed));
	$this->convertMP3ToWAV($filename);
	$this->detectFormat();
	$destFile = $this->CreateAsteriskFile($filename,$lang, $voice, $speed);
	$this->debug(__METHOD__ . " Will try to play file: $destFile");
	if($destFile) {
		$playstring = $destFile;
		if ($noanswer){
			$playstring .= ",noanswer";
		}
	}
	$this->exec("Playback", $playstring);
    }

    private function convertMP3ToWAV($filename){
		$pathParts = pathinfo($filename);
		$WAVFilename = $pathParts['dirname'].'/'. basename($filename, ".mp3").".wav";
		if(file_exists($WAVFilename)){
			$this->debug(__METHOD__ . " WAV Filename already exists: $filename ".$WAVFilename);
		return 1;
	}
	$mpg123cmd = $this->mpg123." -q -w $WAVFilename $filename ";
	$this->debug(__METHOD__ . " executing mpg123: $mpg123cmd");
	$retMpg123 = exec($mpg123cmd);
	$this->debug(__METHOD__ . " mpg123 returned $retMpg123");
    }

    private function CreateAsteriskFile($filename,$lang, $voice, $speed){
	$pathParts = pathinfo($filename);
	$destFile = $pathParts['dirname'].'/' . basename($filename, ".wav") . "_" . $this->samplerate."_".$lang . "_".$voice."_".$speed ;
	if (file_exists($destFile . "." . $this->format)){
		$this->debug(__METHOD__ . " Asterisk sound file already exists: ".$destFile);
		return $destFile;
	}
	$soxcmd = $this->sox ." ". $filename . " -q -r " . $this->samplerate . " -t raw ". $destFile . "." . $this->format;
	$this->debug(__METHOD__ . " executing sox: $soxcmd");
	exec($soxcmd);
	return $destFile;
    }

    private function detectFormat(){
	$codec = $this->get_variable("CHANNEL(audionativeformat)"); $codec = $codec['data'];
	$this->debug(__METHOD__ . " Detected codec: $codec");
	$this->codec = $codec;
	if (preg_match('/(silk|sln)12/', $codec)) { $this->format = "sln12" ; $this->samplerate = 12000;}
	elseif (preg_match('/(speex|slin|silk)16|g722|siren7/', $codec)) { $this->format = "sln16" ; $this->samplerate = 16000;}
	elseif (preg_match('/(speex|slin|celt)32|siren14/', $codec)) { $this->format = "sln32"; $this->samplerate = 32000;}
	elseif (preg_match('/(celt|slin)44/', $codec)) { $this->format = "sln44"; $this->samplerate = 44100;}
	elseif (preg_match('/(celt|slin)48/', $codec)) { $this->format = "sln48"; $this->samplerate = 48000;}
	else { $this->format = "sln"; $this->samplerate = 8000;}
	$this->debug(__METHOD__ . " Samling rate for this format is : ". $this->format.":".$this->samplerate);
	return 1;
    }





}



?>