//[Update:[Mon Mar 18 IST 2019]]
/*
**Sun Jan 17 2016
Created. 
**Mon Jan 18 2016
Added volume control
**Wed Apr 26 2017
Removed volume control: possibly ruining HP laptop speakers
**Fri May 19 2017
load(...) now returns length so that the length may be displayed via GUI
**Thu Oct 19 2017
Updated the back shift amount from 80000 to 240000 to adapt to new recorder.
**Mon Mar 18 2019
Updated for the new java feature, where the format needs to be explicitly determined.
*/

import java.awt.*;
import javax.swing.*;
import javax.sound.sampled.*;
import java.io.*;

public class Commentary {
    Clip voice;
    FloatControl gainControl;

    public int load(File audioFile) {
        try {
            AudioInputStream ais = AudioSystem.getAudioInputStream(new BufferedInputStream(new FileInputStream(audioFile)));
            AudioFormat format = ais.getFormat();
            System.err.println("Format = ["+format+"]");
            DataLine.Info info = new DataLine.Info(Clip.class, format);
            voice = (Clip)AudioSystem.getLine(info);
            voice.open(ais);
            return voice.getFrameLength();
            //gainControl = (FloatControl) voice.getControl(FloatControl.Type.MASTER_GAIN);
            //volumeUpDown(true);
        }
        catch(Exception ex) {
            System.err.println("oops!");
            ex.printStackTrace();
        }
        return 0;
    }


    void volumeUpDown(boolean up) {
        voice.stop();
        gainControl.setValue(gainControl.getMaximum());
    }

    void encore() {
        pause();
        playFrom(nowAt < 240000? 0: nowAt-240000);
    }
        
    void playFrom(int where) {
        voice.stop();
        voice.setFramePosition((where>=0? where: 0));
        voice.start();
    }
    
    private int nowAt;

    int getNowAt() {
        return nowAt;
    }
    void pause() {
        nowAt = voice.getFramePosition();
        voice.stop();
    }

    public static void main(String args[]) throws Exception {
        Commentary c = new Commentary();
        c.load(new File(args[0]));
        c.playFrom(0);
        Thread.sleep(10000);
        c.encore();
        Thread.sleep(10000);
    }
}