Java implements audio playback code examples by reading and writing

This article mainly introduces the example of audio playback code in Java by reading and writing. The example code is introduced in great detail, which has a certain reference value for everyone's study or work. Friends in need can refer to it

public static void main(String[] args) {
  Audiotest at = new Audiotest("我在测试时,这里必须是盘符的音频文件");
  at.start();
}
import java.io.File;
import java.io.IOException;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.sourceDataLine;
import javax.sound.sampled.UnsupportedAudioFileException;

public class Audiotest extends Thread {

  //1.定义音频文件的变量,变量需要:一个用于存储音频文件对象名字的String对象 filename
  private String filename;
  //2.构造函数,初始化filename
  public Audiotest(String filename){
    this.filename = filename;
  }

  @Override
  public void run() {
    //1.定义一个文件对象引用,指向名为filename那个文件
    File sourceFile = new File(filename);
    //定义一个AudioInputStream用于接收输入的音频数据
    AudioInputStream audioInputStream = null;
    //使用AudioSystem来获取音频的音频输入流
    try {
      audioInputStream = AudioSystem.getAudioInputStream(sourceFile);
    } catch (UnsupportedAudioFileException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }
    //4,用AudioFormat来获取AudioInputStream的格式
    AudioFormat format = audioInputStream.getFormat();
    //5.源数据行SoureDataLine是可以写入数据的数据行
    SourceDataLine auline = null;
    //获取受数据行支持的音频格式DataLine.info
    DataLine.Info info = new DataLine.Info(SourceDataLine.class,format);

    //获得与指定info类型相匹配的行
    try {
      auline = (SourceDataLine) AudioSystem.getLine(info);
      //打开具有指定格式的行,这样可使行获得所有所需系统资源并变得可操作
      auline.open();
    } catch (LineUnavailableException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    //允许某一个数据行执行数据I/O
    auline.start();

    //写出数据
    int nBytesRead = 0;
    byte[] abData = new byte[2];
    //从音频流读取指定的最大数量的数据字节,并将其放入给定的字节数组中。
    try {
      while (nBytesRead != -1) {
        nBytesRead = audioInputStream.read(abData,abData.length);
        //通过此源数据行将数据写入混频器
        if (nBytesRead >= 0)
          auline.write(abData,nBytesRead);
      }
    } catch (IOException e) {
      e.printStackTrace();
    } finally {
      auline.drain();
      auline.close();
    }  }
}

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