record.java

Java录音程序

import javax.sound.sampled.*;
import java.io.*;
import java.util.*;

/**
 * Record类
 *
 * 实现录音功能
 */
class Record implements Runnable
{
    private Thread thread;
	public byte audioBytes[];				//原始语音数据
	public static Clip clip;

    public void start() 
    {
    	thread = new Thread(this);
        thread.setName("Record");
        thread.start();
    }

    public void stop() 
    {
        thread = null;
    }
        
    private void shutDown(String message) 
    {
        if (thread != null) 
        {
        	thread = null;
            Interface.wavMap.repaint();
        }
    }
    
    public void run()
    {
    	AudioFormat format = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, 8000, 8,
			1, 1, 8000, true);   //一个样本是一帧，每秒8000个样本
		DataLine.Info info = new DataLine.Info(TargetDataLine.class,format);
		TargetDataLine line;
		
		try 
        {
          	line = (TargetDataLine) AudioSystem.getLine(info);
        	line.open(format, line.getBufferSize());
 //       	System.out.println(line.getBufferSize());
        } 
        catch (LineUnavailableException lue) 
        { 
             System.out.println(lue.toString());
             return;
        } 
        catch (SecurityException se) 
        { 
             System.out.println(se.toString());
             return;
        } 
        catch (Exception e) 
        { 
             System.out.println(e.toString());
             return;
        }
        
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int frameSizeInBytes = format.getFrameSize();
//		System.out.println(frameSizeInBytes);
        int bufferLengthInFrames = line.getBufferSize() / 8;
//		System.out.println(bufferLengthInFrames);
        int bufferLengthInBytes = bufferLengthInFrames * frameSizeInBytes;
//		System.out.println(bufferLengthInBytes);
        byte[] data = new byte[bufferLengthInBytes];
        int numBytesRead=0;
        
        line.start();
        
//		int i=0;
        while (thread != null) 
        {
        	if((numBytesRead = line.read(data, 0, bufferLengthInBytes)) == -1) 
            {
            	break;
            }
            out.write(data, 0, numBytesRead);
/*			System.out.print(i);
            System.out.print(":");
            System.out.print(data[i]);
            System.out.print(" ");
            i++;*/
        }
        
        line.stop();
        line.close();
        line = null;
        
        try 
        {
            out.flush();
            out.close();
        }
        catch(IOException ex) 
        {
        	ex.printStackTrace();
        }
        
        byte tempAudioBytes[] = out.toByteArray();
        audioBytes=tempAudioBytes;
/*		for(int i=0;i<audioBytes.length;i++)
        	System.out.println(audioBytes[i]);
        System.out.println(audioBytes.length);*/
        ByteArrayInputStream bais = new ByteArrayInputStream(audioBytes);
        AudioInputStream wavStream = new AudioInputStream(bais, format, audioBytes.length / frameSizeInBytes);
		AudioFormat wavFormat=wavStream.getFormat();
		
		DataLine.Info info1 = new DataLine.Info(
			Clip.class, 
			wavStream.getFormat(), 
			((int) wavStream.getFrameLength() * wavFormat.getFrameSize())
		);
		try
		{
			clip = (Clip) AudioSystem.getLine(info1);	    	
			clip.open(wavStream);
			Object currentSound=clip;
		}
		catch(Exception e)
		{
			System.out.println(e.toString());
		}

        try 
        {
            wavStream.reset();
        }
        catch(Exception e)
        {
        	System.out.println(e.toString());
        }

        Interface.wavMap.getAudioInputStream(wavStream);
		Interface.wavMap.createWaveForm(null);
    }
}