使用 kevin 或 mbrola 时 Freetts 的例外情况

Question

我正在尝试使用 freetts 运行一个程序。我能够编译该程序，但无法使用 kevin 或 mbrola 声音 我在最后得到以下输出消息

系统属性“mbrola.base”未定义。不会使用 MBROLA 声音。
行不可用：格式为 pcm_signed 16000.0 Hz 16 位 1 通道大端

import javax.speech.*;
import javax.speech.synthesis.*;
import java.util.*;

class freetts {

    public static void main(String[] args) {
        try{ 
            Calendar calendar = new GregorianCalendar();
            String sayTime = "It is " + calendar.get(Calendar.HOUR) + " " + calendar.get(Calendar.MINUTE) + " " + (calendar.get(Calendar.AM_PM)==0 ? "AM":"PM");
            Synthesizer synth = Central.createSynthesizer(null);
            synth.allocate();
            synth.resume();
            synth.speakPlainText(sayTime, null);
            synth.waitEngineState(Synthesizer.QUEUE_EMPTY);
            synth.deallocate();
        }
        catch(Exception e){
            e.printStackTrace();
        }
    }
}

Answer 1

似乎“要启用对 MBROLA 的 FreeTTS 支持，只需将 mbrola/mbrola.jar 复制到 lib/mbrola.jar。然后，每当您运行任何 FreeTTS 应用程序时，请将“mbrola.base”目录指定为系统属性：

  java -Dmbrola.base=/home/jim/mbrola -jar bin/FreeTTSHelloWorld.jar mbrola_us1"

我发现了这个位于：

http://freetts.sourceforge.net/mbrola/README.html

Answer 2

http://workorhobby.blogspot.com/2011/02 /java-audio-freetts-line-unavailable.html

非常感谢作者。

---

基于 FreeTTS（Java 的免费文本转语音引擎）的程序偶尔会出现错误

"LINE UNAVAILABLE: Format is ..."

事实证明，没有 Java 异常或其他机制来检测 FreeTTS 库内部发生的此错误。您得到的只是 System.out 上的消息，因此没有好的方法以编程方式做出反应。

解决方法：将 FreeTTS 音频播放器配置为多次尝试访问音频设备，直至成功。本例中使用了0.1秒的短暂延迟，以免错过抢占音频设备的机会；我们继续尝试30秒：

System.setProperty("com.sun.speech.freetts.audio.AudioPlayer.openFailDelayMs", "100");
System.setProperty("com.sun.speech.freetts.audio.AudioPlayer.totalOpenFailDelayMs", "30000");

如果音频设备被另一个程序永久使用，当然无法访问。在 Linux 下，此命令将显示当前持有音频设备的进程的 ID，因此您可以尝试删除有问题的程序：

/sbin/fuser /dev/dsp

Answer 3

第二个短语与 mbrola 无关，但与一个可怕的 java linux 声音错误有关，该错误仍未修复。
在这里查看第三篇文章：
https://forums.oracle.com/forums/thread.jspa?threadID= 2206163

发生这种情况是因为 freetts“信任”sourcedataline，而不是在该帖子上执行解决方法。该错误存在于 jdk 中，但可以通过查找 freetts 中发生的位置并插入解决方法来解决此问题。重新编译。

这是一个测试用例

package util.speech;

import java.util.Iterator;
import java.util.Locale;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.Mixer;
import javax.sound.sampled.SourceDataLine;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Assume;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;

public class VoiceTest {



    public VoiceTest() {
    }

    @BeforeClass
    public static void setUpClass() throws Exception {
    }

    @AfterClass
    public static void tearDownClass() throws Exception {
    }

    @Before
    public void setUp() {

    }

    @After
    public void tearDown() {
    }

    @Test
    public void testDataLineAvailableAndBuggyInJDK() throws LineUnavailableException {
        boolean failedSimpleGetLine = false;
        AudioFormat format = new AudioFormat(44100, 16, 2, true, false);
        SourceDataLine line = null;
        DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
        try {
            line = (SourceDataLine) AudioSystem.getLine(info);
        } catch (LineUnavailableException e) {
            //ok, at least it says so
            throw e;
        }
        try {
            //if this fails the jdk is very buggy, since it just told us
            //the line was available
            line.open(format);
        } catch (LineUnavailableException e) {
            failedSimpleGetLine = true;
        } finally {
            if (line.isOpen()) {
                line.close();
            }
        }



        //now if this is true, test if it's possible to get a valid sourcedataline
        //or the only bug is adquiring a sourcedataline doesn't throw a lineunavailable
        //exception before open
        Assume.assumeTrue(failedSimpleGetLine);
        line = getSourceDataLine(format);
        if (line == null) {
            return;
        }

        try {
            line.open(format);
        } catch (LineUnavailableException e) {
            //ok then it is consistent, and there is only one bug
            fail("Line Unavailable after being adquired");
        } finally {
            if (line.isOpen()) {
                line.close();
            }
        }
        fail("line available after first test not managing to adquire it");
    }


    private SourceDataLine getSourceDataLine(AudioFormat format) {
        try {
            DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
            for (Mixer.Info mi : AudioSystem.getMixerInfo()) {
                SourceDataLine dataline = null;
                try {
                    Mixer mixer = AudioSystem.getMixer(mi);
                    dataline = (SourceDataLine) mixer.getLine(info);
                    dataline.open(format);
                    dataline.start();
                    return dataline;
                } catch (Exception e) {
                }
                if (dataline != null) {
                    try {
                        dataline.close();
                    } catch (Exception e) {
                    }
                }
            }
        } catch (Exception e) {
        }
        return null;
    }
}

Answer 4

我知道我发布的有点晚了，但这可能会对某人有所帮助。我尝试了凯文和姆布罗拉，这对我有用。请找到下面的代码。

    package com.mani.texttospeech;

import java.beans.PropertyVetoException;
import java.util.Locale;

import javax.speech.AudioException;
import javax.speech.Central;
import javax.speech.EngineException;
import javax.speech.EngineStateError;
import javax.speech.synthesis.Synthesizer;
import javax.speech.synthesis.SynthesizerModeDesc;
import javax.speech.synthesis.Voice;

/**
 *
 * @author Manindar
 */
public class SpeechUtils {

    SynthesizerModeDesc desc;
    Synthesizer synthesizer;
    Voice voice;

    public void init(String voiceName) throws EngineException, AudioException, EngineStateError, PropertyVetoException {
        if (desc == null) {
            System.setProperty("freetts.voices", "com.sun.speech.freetts.en.us.cmu_us_kal.KevinVoiceDirectory");
            desc = new SynthesizerModeDesc(Locale.US);
            Central.registerEngineCentral("com.sun.speech.freetts.jsapi.FreeTTSEngineCentral");
            synthesizer = Central.createSynthesizer(desc);
            synthesizer.allocate();
            synthesizer.resume();
            SynthesizerModeDesc smd = (SynthesizerModeDesc) synthesizer.getEngineModeDesc();
            Voice[] voices = smd.getVoices();
            for (Voice voice1 : voices) {
                if (voice1.getName().equals(voiceName)) {
                    voice = voice1;
                    break;
                }
            }
            synthesizer.getSynthesizerProperties().setVoice(voice);
        }
    }

    public void terminate() throws EngineException, EngineStateError {
        synthesizer.deallocate();
    }

    public void doSpeak(String speakText) throws EngineException, AudioException, IllegalArgumentException, InterruptedException {
        synthesizer.speakPlainText(speakText, null);
        synthesizer.waitEngineState(Synthesizer.QUEUE_EMPTY);
    }

    public static void main(String[] args) throws Exception {
        SpeechUtils su = new SpeechUtils();
        su.init("kevin16");
//        su.init("kevin");
//        su.init("mbrola_us1");
//        su.init("mbrola_us2");
//        su.init("mbrola_us3");
        // high quality
        su.doSpeak("Hi this is Manindar. Welcome to audio world.");
        su.terminate();
    }
}

并将以下依赖项添加到您的 pom.xml 文件中。

<dependencies>
        <dependency>
            <groupId>net.sf.sociaal</groupId>
            <artifactId>freetts</artifactId>
            <version>1.2.2</version>
        </dependency>
    </dependencies>

希望这会有所帮助。