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/*******************************************************************************
 * Copyright 2011 See LIBGDX_AUTHORS file.
 * 
 * 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.
 ******************************************************************************/
package com.badlogic.gdx.backends.iosrobovm;

import org.mini2Dx.core.audio.Mini2DxAudio;
import org.mini2Dx.core.audio.SoundCompletionListener;
import org.robovm.apple.foundation.NSArray;

import com.badlogic.gdx.backends.iosrobovm.objectal.ALChannelSource;
import com.badlogic.gdx.backends.iosrobovm.objectal.ALSource;
import com.badlogic.gdx.backends.iosrobovm.objectal.OALSimpleAudio;
import com.badlogic.gdx.utils.Array;
import com.badlogic.gdx.utils.LongArray;

/**
 *
 */
public class IOSMini2DxAudio extends IOSAudio implements Mini2DxAudio {
	private final Array soundCompletionListeners = new Array(false, 1, SoundCompletionListener.class);
	private final LongArray recentSoundIds = new LongArray();
	
	private final ALChannelSource channel;
	private final NSArray sourcePool;
	
	public IOSMini2DxAudio(IOSApplicationConfiguration config) {
		super(config);
		channel = OALSimpleAudio.sharedInstance().getChannelSource();
		sourcePool = channel.getSourcePool().getSources();
	}

	@Override
	public void addSoundCompletionListener(SoundCompletionListener listener) {
		soundCompletionListeners.add(listener);
	}

	@Override
	public void removeSoundCompletionListener(SoundCompletionListener listener) {
		soundCompletionListeners.removeValue(listener, false);
	}

	@Override
	public void update() {
		for (int i = recentSoundIds.size - 1; i >= 0; i--) {
			long soundId = recentSoundIds.items[i];
			
			ALSource source = getSoundSource(soundId);
			if (source == null) {
				continue;
			}
			//TODO: Check if sound has finished playing
			recentSoundIds.removeIndex(i);
			for (int j = soundCompletionListeners.size - 1; j >= 0; j--) {
				soundCompletionListeners.items[j].onCompletion(soundId);
			}
		}
	}
	
	void appendRecentSoundId(long soundId) {
		recentSoundIds.add(soundId);
	}
	
	private ALSource getSoundSource (long soundId) {	
		for (ALSource source : sourcePool) {
			if (source.getSourceId() == soundId) return source;			
		}
		return null;
	}

	@Override
	public void dispose() {
	}

}