Lwjgl3Audio.java

/**
 * Copyright 2008 - 2015 The Loon Game Engine Authors
 * 
 * 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 loon
 * @author cping
 * @email：javachenpeng@yahoo.com
 * @version 0.5
 */
package loon.lwjgl;

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.Clip;

import loon.LSystem;
import loon.SoundImpl;
import loon.event.Updateable;

public class Lwjgl3Audio {

	protected static <I> void dispatchLoaded(final SoundImpl<I> sound,
			final I impl) {
		Updateable update = new Updateable() {
			@Override
			public void action(Object a) {
				sound.onLoaded(impl);
			}
		};
		LSystem.unload(update);
	}

	protected static <I> void dispatchLoadError(final SoundImpl<I> sound,
			final Throwable error) {
		Updateable update = new Updateable() {
			@Override
			public void action(Object a) {
				sound.onLoadError(error);
			}
		};
		LSystem.unload(update);
	}

	public Lwjgl3Sound createSound(final String path, final InputStream in,
			final boolean music) {
		final Lwjgl3Sound sound = new Lwjgl3Sound();
		String ext = LSystem.getExtension(path);
		if ("ogg".equalsIgnoreCase(ext)) {
			LSystem.load(new Updateable() {
				public void action(Object o) {
					try {
						sound.loadOgg(in);
						dispatchLoaded(sound, new Object());
					} catch (IOException e) {
						dispatchLoadError(sound, e);
					}
				}
			});
		} else {
			LSystem.load(new Updateable() {
				public void action(Object o) {
					try {
						AudioInputStream ais = AudioSystem
								.getAudioInputStream(in);
						Clip clip = AudioSystem.getClip();
						if (music) {
							clip = new Lwjgl3BigClip(clip);
						}
						AudioFormat baseFormat = ais.getFormat();
						if (baseFormat.getEncoding() != AudioFormat.Encoding.PCM_SIGNED) {
							AudioFormat decodedFormat = new AudioFormat(
									AudioFormat.Encoding.PCM_SIGNED, baseFormat
											.getSampleRate(), 16, baseFormat
											.getChannels(), baseFormat
											.getChannels() * 2, baseFormat
											.getSampleRate(), false);
							ais = AudioSystem.getAudioInputStream(
									decodedFormat, ais);
						}
						clip.open(ais);
						dispatchLoaded(sound, clip);
					} catch (Exception e) {
						dispatchLoadError(sound, e);
					}
				}
			});
		}
		return sound;
	}

	public void onPause() {

	}

	public void onResume() {

	}

	public void onDestroy() {

	}

}