/*

 * Copyright (c) 2007, Oracle and/or its affiliates. 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package com.sun.media.sound;

import java.io.ByteArrayOutputStream;

import java.io.DataInputStream;

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 {

            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())];

                new DataInputStream(ais).readFully(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;

        } 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;

        }

    }

}