LWaveSound.java :  » Game » loon-simple » org » loon » framework » javase » game » media » sound » Android Open Source

package org.loon.framework.javase.game.media.sound;

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.Control;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.FloatControl;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;

import org.loon.framework.javase.game.core.resource.Resources;

/**
 * Copyright 2008 - 2009
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 * 
 * @project loonframework
 * @author chenpeng
 * @emailceponline@yahoo.com.cn
 * @version 0.1
 */
public class LWaveSound implements Sound {

  private SourceDataLine clip;

  private boolean isRunning;

  private float volume;

  public LWaveSound() {
    setSoundVolume(Sound.defaultMaxVolume);
  }

  public void playSound(String fileName) {
    playSound(Resources.getResourceAsStream(fileName));
  }

  public void playSound(InputStream is) {
    if (is == null) {
      return;
    }

    isRunning = true;

    AudioInputStream ain = null;

    try {

      ain = AudioSystem.getAudioInputStream(is);

      if (ain == null) {
        return;
      }
      AudioFormat format = ain.getFormat();

      if ((format.getEncoding() == AudioFormat.Encoding.ULAW)
          || (format.getEncoding() == AudioFormat.Encoding.ALAW)) {

        AudioFormat temp = new AudioFormat(
            AudioFormat.Encoding.PCM_SIGNED,
            format.getSampleRate(),
            format.getSampleSizeInBits() * 2, format.getChannels(),
            format.getFrameSize() * 2, format.getFrameRate(), true);
        ain = AudioSystem.getAudioInputStream(temp, ain);
        format = temp;
      }

      rawplay(format, ain, volume);
    } catch (Exception e) {

    } finally {
      if (ain != null) {
        try {
          ain.close();
        } catch (Exception e) {
        }
      }
    }
  }

  public void setSoundVolume(int volume) {
    this.volume = volume;
  }

  private void rawplay(AudioFormat trgFormat, AudioInputStream ain,
      float volume) throws IOException, LineUnavailableException {
    byte[] data = new byte[8192];
    try {
      clip = getLine(ain, trgFormat);
      if (clip == null) {
        return;
      }
      Control.Type vol1 = FloatControl.Type.VOLUME, vol2 = FloatControl.Type.MASTER_GAIN;
      FloatControl c = (FloatControl) clip
          .getControl(FloatControl.Type.MASTER_GAIN);
      float min = c.getMinimum();
      float v = volume * (c.getMaximum() - min) / 100f + min;
      if (this.clip.isControlSupported(vol1)) {
        FloatControl volumeControl = (FloatControl) this.clip
            .getControl(vol1);
        volumeControl.setValue(v);
      } else if (this.clip.isControlSupported(vol2)) {
        FloatControl gainControl = (FloatControl) this.clip
            .getControl(vol2);
        gainControl.setValue(v);
      }
      clip.start();
      int nBytesRead = 0;
      while (isRunning && (nBytesRead != -1)) {
        nBytesRead = ain.read(data, 0, data.length);
        if (nBytesRead != -1) {
          clip.write(data, 0, nBytesRead);
        }
      }
    } finally {
      clip.drain();
      clip.stop();
      clip.close();
      ain.close();
    }
  }

  private SourceDataLine getLine(AudioInputStream ain, AudioFormat audioFormat)
      throws LineUnavailableException {
    DataLine.Info info = new DataLine.Info(SourceDataLine.class, ain
        .getFormat(), ((int) ain.getFrameLength() * audioFormat
        .getFrameSize()));
    clip = (SourceDataLine) AudioSystem.getLine(info);
    clip.open(audioFormat);
    return clip;
  }

  public void stopSound() {
    if (clip != null) {
      clip.stop();
    }
    isRunning = false;
  }

  public boolean isVolumeSupported() {
    return true;
  }
}