/*

 * Copyright (c) 1999, 2013, 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 sun.audio;

import java.io.InputStream;

import java.io.FilterInputStream;

import java.io.BufferedInputStream;

import java.io.IOException;

import javax.sound.sampled.*;

import javax.sound.midi.*;

/**

 * Convert an InputStream to an AudioStream.

 *

 */

public final class AudioStream extends FilterInputStream {

    // AudioContainerInputStream acis;

    AudioInputStream ais = null;

    AudioFormat format = null;

    MidiFileFormat midiformat = null;

    InputStream stream = null;

    /*

     * create the AudioStream; if we survive without throwing

     * an exception, we should now have some subclass of

     * ACIS with all the header info already read

     */

    public AudioStream(InputStream in) throws IOException {

        super(in);

        stream = in;

        if( in.markSupported() == false ) {

            stream = new BufferedInputStream( in, 1024 );

        }

        try {

            ais = AudioSystem.getAudioInputStream( stream );

            format = ais.getFormat();

            this.in = ais;

        } catch (UnsupportedAudioFileException e ) {

            // not an audio file, see if it's midi...

            try {

                midiformat = MidiSystem.getMidiFileFormat( stream );

            } catch (InvalidMidiDataException e1) {

                throw new IOException("could not create audio stream from input stream");

            }

        }

    }

    /**

     * A blocking read.

     */

    /*    public int read(byte buf[], int pos, int len) throws IOException {

          return(acis.readFully(buf, pos, len));

          }

    */

    /**

     * Get the data.

     */

    public AudioData getData() throws IOException {

        int length = getLength();

        //limit the memory to 1M, so too large au file won't load

        if (length < 1024*1024) {

            byte [] buffer = new byte[length];

            try {

                ais.read(buffer, 0, length);

            } catch (IOException ex) {

                throw new IOException("Could not create AudioData Object");

            }

            return new AudioData(format, buffer);

        }

        /*              acis.setData();

                        if (acis.stream instanceof ByteArrayInputStream) {

                        Format[] format = acis.getFormat();

                        byte[] bytes = acis.getBytes();

                        if (bytes == null)

                        throw new IOException("could not create AudioData object: no data received");

                        return new AudioData((AudioFormat)format[0], bytes);

                        }

        */

        throw new IOException("could not create AudioData object");

    }

    public int getLength() {

        if( ais != null && format != null ) {

            return (int) (ais.getFrameLength() *

                          ais.getFormat().getFrameSize() );

        } else if ( midiformat != null ) {

            return (int) midiformat.getByteLength();

        } else {

            return -1;

        }

    }

}