/*
 * Copyright 2007 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

package com.sun.media.sound;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import javax.sound.midi.InvalidMidiDataException;
import javax.sound.midi.Soundbank;
import javax.sound.midi.spi.SoundbankReader;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.UnsupportedAudioFileException;

/**
 * Soundbank reader that uses audio files as soundbanks.
 * 
 * @version %I%, %E% 
 * @author Karl Helgason
 * 
 */
public class AudioFileSoundbankReader extends SoundbankReader {

	public Soundbank getSoundbank(URL url) throws InvalidMidiDataException,
			IOException {
		try {
			AudioInputStream ais = AudioSystem.getAudioInputStream(url);
			Soundbank sbk = getSoundbank(ais);
			ais.close();
			return sbk;
		} catch (UnsupportedAudioFileException e) {
			return null;
		} catch (IOException e) {
			return null;
		}
	}

	public Soundbank getSoundbank(InputStream stream)
			throws InvalidMidiDataException, IOException {

		stream.mark(512);
		try {
			AudioInputStream ais = AudioSystem.getAudioInputStream(stream);
			Soundbank sbk = getSoundbank(ais);
			if (sbk != null)
				return sbk;
		} catch (UnsupportedAudioFileException e) {
		} catch (IOException e) {
		}
		stream.reset();
		return null;
	}

	public Soundbank getSoundbank(AudioInputStream ais)
			throws InvalidMidiDataException, IOException {

		try {
			try {
				byte[] buffer;
				if (ais.getFrameLength() == -1) {
					ByteArrayOutputStream baos = new ByteArrayOutputStream();
					byte[] buff = new byte[1024 - (1024 % ais.getFormat().getFrameSize())];
					int ret;
					while ((ret = ais.read(buff)) != -1)
						baos.write(buff, 0, ret);
					ais.close();
					buffer = baos.toByteArray();
				} else {
					buffer = new byte[(int) (ais.getFrameLength() * ais
							.getFormat().getFrameSize())];
					ais.read(buffer);
				}
				ModelByteBufferWavetable osc = new ModelByteBufferWavetable(
						new ModelByteBuffer(buffer), ais.getFormat(), -4800);
				ModelPerformer performer = new ModelPerformer();
				;
				performer.getOscillators().add(osc);

				SimpleSoundbank sbk = new SimpleSoundbank();
				SimpleInstrument ins = new SimpleInstrument();
				ins.add(performer);
				sbk.addInstrument(ins);
				return sbk;
			} finally {
			}
		} catch (Exception e) {
			return null;
		}
	}

	public Soundbank getSoundbank(File file) throws InvalidMidiDataException,
			IOException {

		try {									
				AudioInputStream ais = AudioSystem.getAudioInputStream(file);
				ais.close();
				ModelByteBufferWavetable osc = new ModelByteBufferWavetable(
					new ModelByteBuffer(file, 0, file.length()), -4800);
				ModelPerformer performer = new ModelPerformer();				
				performer.getOscillators().add(osc);
				SimpleSoundbank sbk = new SimpleSoundbank();
				SimpleInstrument ins = new SimpleInstrument();
				ins.add(performer);
				sbk.addInstrument(ins);
				return sbk;							
		} catch (UnsupportedAudioFileException e1) {
			return null;
		} catch (IOException e) {
			return null;
		}

	}
	
	
}