SpeechSynthesizer.java

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/*************************************************************************
 *                                                                       *
 * Voce                                                                  *
 * Copyright (C) 2005                                                    *
 * Tyler Streeter  tylerstreeter@gmail.com                               *
 * All rights reserved.                                                  *
 * Web: voce.sourceforge.net                                             *
 *                                                                       *
 * This library is free software; you can redistribute it and/or         *
 * modify it under the terms of EITHER:                                  *
 *   (1) The GNU Lesser General Public License as published by the Free  *
 *       Software Foundation; either version 2.1 of the License, or (at  *
 *       your option) any later version. The text of the GNU Lesser      *
 *       General Public License is included with this library in the     *
 *       file license-LGPL.txt.                                          *
 *   (2) The BSD-style license that is included with this library in     *
 *       the file license-BSD.txt.                                       *
 *                                                                       *
 * This library is distributed in the hope that it will be useful,       *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the files    *
 * license-LGPL.txt and license-BSD.txt for more details.                *
 *                                                                       *
 *************************************************************************/ 

package voce;

import java.io.File;
import java.util.Locale;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.speech.Central;
import javax.speech.Engine;
import javax.speech.EngineList;
import javax.speech.EngineCreate;
import javax.speech.EngineException;
import javax.speech.EngineModeDesc;
import javax.speech.synthesis.Synthesizer;
import javax.speech.synthesis.SynthesizerModeDesc;
import javax.speech.synthesis.SynthesizerProperties;
import javax.speech.synthesis.Voice;
import javax.speech.synthesis.Speakable;
import javax.speech.synthesis.SpeakableAdapter;
import javax.speech.synthesis.SpeakableEvent;
import com.sun.speech.freetts.jsapi.FreeTTSEngineCentral; 

public class SpeechSynthesizer
{
        private Synthesizer mSynthesizer = null;

        public SpeechSynthesizer(String name)
        {
                // Create a default voice.
                Voice theVoice = new Voice(name, 
                        Voice.GENDER_DONT_CARE, Voice.AGE_DONT_CARE, null);

                try
                {               
                        // Create the synthesizer with the general domain voice.
                        SynthesizerModeDesc generalDesc = new SynthesizerModeDesc(
                                null,                   // engine name
                                "general",              // mode name
                                Locale.US,              // locale
                                null,                   // running
                                null);                  // voice

                        // Avoid using the JSAPI Central class (and the use of the speech.properties 
                        // file) by using FreeTTSEngineCentral directly.
                        FreeTTSEngineCentral central = new FreeTTSEngineCentral();
                        EngineList list = central.createEngineList(generalDesc); 

                        if (list.size() > 0)
                        { 
                                EngineCreate creator = (EngineCreate)list.get(0);
                                mSynthesizer = (Synthesizer)creator.createEngine();
                        }

                        if (null  == mSynthesizer)
                        {
                                Utils.log("ERROR", "Cannot create speech synthesizer");
                                System.exit(1);
                        }

                        mSynthesizer.allocate();

                        // Setup the general domain synthesizer.
                        mSynthesizer.getSynthesizerProperties().setVoice(theVoice);

                        mSynthesizer.resume();

                        // Force the synthesizer to create its thread now by making 
                        // it synthesize something.  Otherwise, the first synthesize 
                        // request in a user's app could be delayed.
                        synthesize(" ");
                }
                catch (Exception e)
                {
                        e.printStackTrace();
                }
        }
        
        public void destroy()
        {
                mSynthesizer.cancelAll();
                
                try
                {               
                        mSynthesizer.deallocate();
                }
                catch (Exception e)
                {
                        e.printStackTrace();
                }
        }

        public void synthesize(String message)
        {
                //Utils.log("debug", "SpeechSynthesizer.speak: Adding message to speech queue: " + message);
        
                // Note that the Synthesize class maintains its own internal queue.
                mSynthesizer.speakPlainText(message, null);
        }

        public void stopSynthesizing()
        {
                mSynthesizer.cancelAll();
        }
}

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