audiorecorder.java

一个JAVA的音频控制的例程

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
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.LineUnavailableException;
import javax.sound.sampled.TargetDataLine;



public class   AudioRecorder implements Runnable {

    private TargetDataLine line;
    private Thread thread;
    private String errStr = "";
    private File file;
    private String fileName;
    private double duration, seconds;
    private AudioInputStream audioInputStream;
    //private FormatControls formatControls = new FormatControls();
    
    public AudioRecorder(File file){
    	this.file = file;
    	
    }
    
    public void start() {
        errStr = null;
        thread = new Thread(this);
        thread.setName("Recorder");
        thread.start();
    }

    public void stop() {
        thread = null;
    }
    
    private void shutDown(String message) {
        if ((errStr = message) != null && thread != null) {
            thread = null;
//            samplingGraph.stop();
//            loadB.setEnabled(true);
//            playB.setEnabled(true);
//            pausB.setEnabled(false);
//            auB.setEnabled(true);
//            aiffB.setEnabled(true);
//            waveB.setEnabled(true);
//            captB.setText("Record");
            System.err.println(errStr);
//            samplingGraph.repaint();
        }
    }

    public void run() {

        duration = 0;
        audioInputStream = null;
        
        // define the required attributes for our line, 
        // and make sure a compatible line is supported.

        AudioFormat format =   new AudioFormat( AudioFormat.Encoding.PCM_SIGNED, 44100, 16, 
                1, (16/8)*1, 44100, true);
        DataLine.Info info = new DataLine.Info(TargetDataLine.class, 
            format);
                    
        if (!AudioSystem.isLineSupported(info)) {
            shutDown("Line matching " + info + " not supported.");
            return;
        }

        // get and open the target data line for capture.

        try {
            line = (TargetDataLine) AudioSystem.getLine(info);
            line.open(format, line.getBufferSize());
        } catch (LineUnavailableException ex) { 
            shutDown("Unable to open the line: " + ex);
            return;
        } catch (SecurityException ex) { 
            shutDown(ex.toString());
            return;
        } catch (Exception ex) { 
            shutDown(ex.toString());
            return;
        }

        // play back the captured audio data
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int frameSizeInBytes = format.getFrameSize();
        int bufferLengthInFrames = line.getBufferSize() / 8;
        int bufferLengthInBytes = bufferLengthInFrames * frameSizeInBytes;
        byte[] data = new byte[bufferLengthInBytes];
        int numBytesRead;
        
        line.start();

        while (thread != null) {
            if((numBytesRead = line.read(data, 0, bufferLengthInBytes)) == -1) {
                break;
            }
            out.write(data, 0, numBytesRead);
        }

        // we reached the end of the stream.  stop and close the line.
        line.stop();
        line.close();
        line = null;

        // stop and close the output stream
        try {
            out.flush();
            out.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }

        // load bytes into the audio input stream for playback

        byte audioBytes[] = out.toByteArray();
        ByteArrayInputStream bais = new ByteArrayInputStream(audioBytes);
        audioInputStream = new AudioInputStream(bais, format, audioBytes.length / frameSizeInBytes);

        long milliseconds = (long)((audioInputStream.getFrameLength() * 1000) / format.getFrameRate());
        duration = milliseconds / 1000.0;

        try {
            audioInputStream.reset();
        } catch (Exception ex) { 
            ex.printStackTrace(); 
            return;
        }

        //samplingGraph.createWaveForm(audioBytes);
    }
    
    public void saveToFile(String name, AudioFileFormat.Type fileType) {

        if (audioInputStream == null) {
            reportStatus("No loaded audio to save");
            return;
//        } else if (file != null) {
//            createAudioInputStream(file, false);
        }

        // reset to the beginnning of the captured data
        try {
            audioInputStream.reset();
        } catch (Exception e) { 
            reportStatus("Unable to reset stream " + e);
            return;
        }

        File file = new File(fileName = name);
        try {
            if (AudioSystem.write(audioInputStream, fileType, file) == -1) {
                throw new IOException("Problems writing to file");
            }
        } catch (Exception ex) { reportStatus(ex.toString()); }
     }    
    private void reportStatus(String msg) {
        if ((errStr = msg) != null) {
        }
        System.out.println(errStr);
    }
    
    public void createAudioInputStream(File file, boolean updateComponents) {
        if (file != null && file.isFile()) {
            try {
                this.file = file;
                errStr = null;
                audioInputStream = AudioSystem.getAudioInputStream(file);
                fileName = file.getName();
                long milliseconds = (long)((audioInputStream.getFrameLength() * 1000) / audioInputStream.getFormat().getFrameRate());
                duration = milliseconds / 1000.0;
            } catch (Exception ex) { 
                reportStatus(ex.toString());
            }
        } else {
            reportStatus("Audio file required.");
        }
    }

	public AudioInputStream getAudioInputStream() {
		return audioInputStream;
	}

	public void setAudioInputStream(AudioInputStream audioInputStream) {
		this.audioInputStream = audioInputStream;
	}

	public double getDuration() {
		return duration;
	}

	public void setDuration(double duration) {
		this.duration = duration;
	}

	public String getErrStr() {
		return errStr;
	}

	public void setErrStr(String errStr) {
		this.errStr = errStr;
	}

	public File getFile() {
		return file;
	}

	public void setFile(File file) {
		this.file = file;
	}

	public String getFileName() {
		return fileName;
	}

	public void setFileName(String fileName) {
		this.fileName = fileName;
	}

	public TargetDataLine getLine() {
		return line;
	}

	public void setLine(TargetDataLine line) {
		this.line = line;
	}

	public double getSeconds() {
		return seconds;
	}

	public void setSeconds(double seconds) {
		this.seconds = seconds;
	}

	public Thread getThread() {
		return thread;
	}

	public void setThread(Thread thread) {
		this.thread = thread;
	}    
}