Java 怎么确定采样音频文件的持续时间

2019年7月29日20:08:35Java 怎么确定采样音频文件的持续时间已关闭评论 418 1249字阅读4分9秒

1.简介

Java 怎么确定采样音频文件的持续时间?——请看下文。

2.示例代码

/**
 * 版权所有 编程十万个怎么办(www.tah1986.com)
 */

import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

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

public class Main {
  public static void main(String[] argv) {
    try {
      AudioInputStream stream = AudioSystem.getAudioInputStream(new File(
          "audiofile"));

      AudioFormat format = stream.getFormat();
      if (format.getEncoding() != AudioFormat.Encoding.PCM_SIGNED) {
        format = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,
            format.getSampleRate(), format.getSampleSizeInBits() * 2,
            format.getChannels(), format.getFrameSize() * 2,
            format.getFrameRate(), true); 
        stream = AudioSystem.getAudioInputStream(format, stream);
      }

      DataLine.Info info = new DataLine.Info(Clip.class, stream.getFormat(),
          ((int) stream.getFrameLength() * format.getFrameSize()));
      Clip clip = (Clip) AudioSystem.getLine(info);

      
      clip.open(stream);
      double durationInSecs = clip.getBufferSize()
          / (clip.getFormat().getFrameSize() * clip.getFormat().getFrameRate());
      
      clip.start();
    } catch (Exception e) {
    }
  }
}

 
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