java 录音机

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最新推荐文章于 2024-11-04 23:38:55 发布

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分类专栏： java 文章标签： java 录音机

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本文介绍了一个使用Java编写的简单录音程序。该程序利用了Java Sound API来实现声音的录制，并将录制的声音保存为WAV文件格式。具体实现包括设置音频格式、打开目标数据线、开始录制、监听录制过程及停止录制等功能。

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package com.reconize;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineEvent;
import javax.sound.sampled.LineListener;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.TargetDataLine;
public class recorder extends Thread implements LineListener{
	static TargetDataLine m_targetdataline;
	static AudioFileFormat.Type m_targetType;
	static AudioInputStream m_audioInputStream;
	static String Filename = "input.wav";
	static File m_outputFile;
	static ByteArrayOutputStream bos = new ByteArrayOutputStream();
	static byte[] buf = new byte[2048];
	static boolean m_bRecording;
	public recorder(TargetDataLine line,
			AudioFileFormat.Type targetType, File file) {
		m_targetdataline = line;
		m_audioInputStream = new AudioInputStream(line);
		m_targetType = targetType;
		if(file.exists())
			file.delete();
		m_outputFile = file;
	}
	public static void AudioRecorder() {
		
		File outputFile = new File(Filename);
		if(outputFile.exists())
			outputFile.delete();
		AudioFormat audioFormat = null;
		audioFormat = new AudioFormat(AudioFormat.Encoding.PCM_UNSIGNED, 16000F,
				8, 1, 1, 16000F, false);
		DataLine.Info info = new DataLine.Info(TargetDataLine.class,
				audioFormat);
		TargetDataLine targetDataLine = null;
		try {
			targetDataLine = (TargetDataLine) AudioSystem.getLine(info);
			targetDataLine.open(audioFormat);// try{ }可能發生例外的敘述

		} catch (LineUnavailableException e)// catch{ }處理方法

		{
			//System.out.println("無法錄音,錄音失敗 ");
			e.printStackTrace();
			System.exit(-1);
		}
		AudioFileFormat.Type targetType = AudioFileFormat.Type.WAVE;
		recorder recorder = null;
		recorder = new recorder(targetDataLine, targetType,
				outputFile);
		recorder.start();
	}
	public void start() {
		m_targetdataline.start();
		m_targetdataline.addLineListener(this);
		super.start();
		System.out.println("recording...");
	}
	public static void stopRecording() {
		m_targetdataline.stop();
		m_targetdataline.close();
		m_bRecording = false;
		System.out.println("stopped.");
	} 
	public void run() {
		try {
			  AudioSystem.write(m_audioInputStream, m_targetType,  
            m_outputFile); 
			System.out.println("after   write() ");
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	@Override
	public void update(LineEvent event) {
		int value = 0;
		for(int i=0;i<buf.length;i++)
			value+=buf[i];
		System.out.println(value);
	}
}