BlorbSounds.java

/*
 * $Id: BlorbSounds.java 536 2008-02-19 06:03:27Z weiju $
 * 
 * Created on 2006/02/06
 * Copyright 2005-2008 by Wei-ju Wu
 * This file is part of The Z-machine Preservation Project (ZMPP).
 *
 * ZMPP is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * ZMPP is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with ZMPP.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.zmpp.blorb;

import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;

import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;

import org.zmpp.iff.Chunk;
import org.zmpp.iff.FormChunk;
import org.zmpp.media.DefaultSoundEffect;
import org.zmpp.media.SoundEffect;

/**
 * This class implements the Blorb sound collection.
 *
 * @author Wei-ju Wu
 * @version 1.0
 */
public class BlorbSounds extends BlorbMediaCollection<SoundEffect> {

    /**
     * This map implements the database.
     */
    private Map<Integer, SoundEffect> sounds;

    /**
     * Constructor.
     *
     * @param formchunk the form chunk
     */
    public BlorbSounds(FormChunk formchunk) {

        super(formchunk);
    }

    /**
     * {@inheritDoc}
     */
    public void clear() {

        super.clear();
        sounds.clear();
    }

    /**
     * {@inheritDoc}
     */
    protected void initDatabase() {

        sounds = new HashMap<Integer, SoundEffect>();
    }

    /**
     * {@inheritDoc}
     */
    protected boolean isHandledResource(final byte[] usageId) {

        return usageId[0] == 'S' && usageId[1] == 'n' && usageId[2] == 'd'
                && usageId[3] == ' ';
    }

    /**
     * {@inheritDoc}
     */
    public SoundEffect getResource(final int resourcenumber) {

        return sounds.get(resourcenumber);
    }

    /**
     * {@inheritDoc}
     */
    protected boolean putToDatabase(final Chunk chunk, final int resnum) {

        final InputStream aiffStream
                = new MemoryInputStream(chunk.getMemory(), 0,
                        chunk.getSize() + Chunk.CHUNK_HEADER_LENGTH);
        try {

            final AudioFileFormat aiffFormat
                    = AudioSystem.getAudioFileFormat(aiffStream);
            final AudioInputStream stream = new AudioInputStream(aiffStream,
                    aiffFormat.getFormat(), (long) chunk.getSize());
            final Clip clip = AudioSystem.getClip();
            clip.open(stream);
            sounds.put(resnum, new DefaultSoundEffect(clip));
            return true;

        } catch (Exception ex) {

            ex.printStackTrace();
        }
        return false;
    }
}