/*
 * 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.
 *
 * @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;
        }
    }
}