MP3Player.java

package io.loli.sc.core;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

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.SourceDataLine;

public class MP3Player {
    public void play(InputStream is) {
        try {
            AudioInputStream in = AudioSystem.getAudioInputStream(is);
            AudioInputStream din = null;
            AudioFormat baseFormat = in.getFormat();
            AudioFormat decodedFormat = new AudioFormat(
                    AudioFormat.Encoding.PCM_SIGNED,
                    baseFormat.getSampleRate(), 16, baseFormat.getChannels(),
                    baseFormat.getChannels() * 2, baseFormat.getSampleRate(),
                    false);
            din = AudioSystem.getAudioInputStream(decodedFormat, in);
            // Play now.
            rawplay(decodedFormat, din);
            in.close();
        } catch (Exception e) {
            // Handle exception.
        }
    }

    public void play(String filename) {
        try {
            File file = new File(filename);
            play(new FileInputStream(file));
        } catch (Exception e) {
            // Handle exception.
        }
    }

    private void rawplay(AudioFormat targetFormat, AudioInputStream din)
            throws IOException, LineUnavailableException {
        byte[] data = new byte[4096];
        SourceDataLine line = getLine(targetFormat);
        if (line != null) {
            // Start
            line.start();
            @SuppressWarnings("unused")
            int nBytesRead = 0, nBytesWritten = 0;
            while (nBytesRead != -1) {
                nBytesRead = din.read(data, 0, data.length);
                if (nBytesRead != -1)
                    nBytesWritten = line.write(data, 0, nBytesRead);
            }
            // Stop
            line.drain();
            line.stop();
            line.close();
            din.close();
        }
    }

    private SourceDataLine getLine(AudioFormat audioFormat)
            throws LineUnavailableException {
        SourceDataLine res = null;
        DataLine.Info info = new DataLine.Info(SourceDataLine.class,
                audioFormat);
        res = (SourceDataLine) AudioSystem.getLine(info);
        res.open(audioFormat);
        return res;
    }
}