MusicPlayer.java

package mage.client.util.audio;

import java.awt.List;
import java.io.File;
import java.util.concurrent.TimeUnit;
import javax.sound.sampled.*;
import mage.client.constants.Constants;
import mage.client.dialog.PreferencesDialog;
import org.apache.log4j.Logger;

/**
 *
 * @author renli
 */
public class MusicPlayer {

    private static final Logger log = Logger.getLogger(AudioManager.class);
    String filepath;
    String filename;
    final List filelist = new List();
    static MusicPlayer player = null;

    //open file and add list
    private boolean open() {
        String path = PreferencesDialog.getCachedValue(PreferencesDialog.KEY_SOUNDS_MATCH_MUSIC_PATH, "true");
        filepath = path + File.separator;
        if (path == null) {
            filepath = Constants.BASE_MUSICS_PATH;
        }
        filelist.removeAll();
        File filedir = new File(filepath);
        File[] fileread = filedir.listFiles();
        if (fileread == null) {
            return false;
        }
        if (fileread.length == 0) {
            return false;
        }
        String filename;
        for (File f : fileread) {
            filename = f.getName().toLowerCase();
            if (filename.endsWith(".mp3") || filename.endsWith(".wav")) {
                filelist.add(filename);
            }
        }
        if (filelist.getItemCount() == 0) {
            return false;
        }
        return true;
    }

    public static void playBGM() {
        stopBGM();
        if (player == null) {
            player = new MusicPlayer();
        }
        if (player.open()) {
            player.play();
        }
    }

    public void play() {
        String soundsOn = PreferencesDialog.getCachedValue(PreferencesDialog.KEY_SOUNDS_MATCH_MUSIC_ON, "true");
        if (soundsOn.equals("true")) {
            player.breaked = false;
            player.breaked_out = false;
            player.stopped = false;
            Thread player = new Thread(new playerThread());
            player.start();
        }
    }

    public static void stopBGM() {
        if (player != null) {
            player.stopped = true;
            player.breaked_out = true;
            player.breaked = true;
            try {
                TimeUnit.MILLISECONDS.sleep(100);
            } catch (Exception e) {
                log.error("Thread error: " + e);
            }
        }
    }

    public volatile boolean breaked = false;
    public volatile boolean breaked_out = false;
    public volatile boolean stopped = false;
    public volatile FloatControl volume;
    AudioInputStream audioInputStream;
    AudioFormat audioFormat;
    SourceDataLine sourceDataLine;

    class playerThread extends Thread {

        private void load(File file) {
            try {
                audioInputStream = AudioSystem.getAudioInputStream(file);
                audioFormat = audioInputStream.getFormat();
                // mp3 decode
                if (audioFormat.getEncoding() != AudioFormat.Encoding.PCM_SIGNED) {
                    audioFormat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,
                            audioFormat.getSampleRate(), 16, audioFormat.getChannels(), audioFormat.getChannels() * 2,
                            audioFormat.getSampleRate(), false);
                    audioInputStream = AudioSystem.getAudioInputStream(audioFormat, audioInputStream);
                }
                //output
                DataLine.Info dataLineInfo = new DataLine.Info(
                        SourceDataLine.class, audioFormat,
                        AudioSystem.NOT_SPECIFIED);
                sourceDataLine = (SourceDataLine) AudioSystem.getLine(dataLineInfo);
                sourceDataLine.open(audioFormat);
                volume = (FloatControl) sourceDataLine.getControl(FloatControl.Type.MASTER_GAIN);
                sourceDataLine.start();
            } catch (Exception e) {
                log.error("Couldn't load file: " + file + ' ' + e);
            }

        }

        public void run() {
            try {
                TimeUnit.MILLISECONDS.sleep(100);
            } catch (Exception e) {
            }
            while (!stopped) {
                int it = (int) Math.abs(Math.random() * (filelist.getItemCount()));
                File file = new File(filepath + filelist.getItem(it));
                load(file);
                Thread PlayThread = new Thread(new PlayThread());
                PlayThread.start();
                while (!(breaked || breaked_out)) {
                    try {
                        TimeUnit.MILLISECONDS.sleep(10);
                    } catch (Exception e) {
                        log.error("Thread error: " + e);
                    }
                }
                breaked = false;
            }
        }
    }

    class PlayThread extends Thread {

        final byte[] tempBuffer = new byte[320];

        public void run() {
            try {
                sourceDataLine.flush();
                int len;
                while ((len = audioInputStream.read(tempBuffer, 0,
                        tempBuffer.length)) != -1) {
                    if (breaked_out) {
                        break;
                    }
                    if (len > 0) {
                        sourceDataLine.write(tempBuffer, 0, len);
                    }
                }
                //breaked or stopped
                sourceDataLine.flush();
                sourceDataLine.close();
                breaked = true;
            } catch (Exception e) {
                log.error("Thread error: " + e);
            }
        }
    }
}