/*

 * 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.File;

import java.io.InputStream;

import java.io.OutputStream;

import java.io.IOException;

import java.io.DataInputStream;

import javax.sound.sampled.AudioFileFormat;

import javax.sound.sampled.AudioInputStream;

import javax.sound.sampled.spi.AudioFileWriter;

/**

 * Abstract File Writer class.

 *

 * @author Jan Borgersen

 */

abstract class SunFileWriter extends AudioFileWriter {

    // buffer size for write

    protected static final int bufferSize = 16384;

    // buffer size for temporary input streams

    protected static final int bisBufferSize = 4096;

    final AudioFileFormat.Type types[];

    /**

     * Constructs a new SunParser object.

     */

    SunFileWriter(AudioFileFormat.Type types[]) {

        this.types = types;

    }

    // METHODS TO IMPLEMENT AudioFileWriter

    // new, 10.27.99

    public AudioFileFormat.Type[] getAudioFileTypes(){

        AudioFileFormat.Type[] localArray = new AudioFileFormat.Type[types.length];

        System.arraycopy(types, 0, localArray, 0, types.length);

        return localArray;

    }

    public abstract AudioFileFormat.Type[] getAudioFileTypes(AudioInputStream stream);

    public abstract int write(AudioInputStream stream, AudioFileFormat.Type fileType, OutputStream out) throws IOException;

    public abstract int write(AudioInputStream stream, AudioFileFormat.Type fileType, File out) throws IOException;

    // HELPER METHODS

    /**

     * rllong

     * Protected helper method to read 64 bits and changing the order of

     * each bytes.

     * @param DataInputStream

     * @return 32 bits swapped value.

     * @exception IOException

     */

    protected int rllong(DataInputStream dis) throws IOException {

        int b1, b2, b3, b4 ;

        int i = 0;

        i = dis.readInt();

        b1 = ( i & 0xFF ) << 24 ;

        b2 = ( i & 0xFF00 ) << 8;

        b3 = ( i & 0xFF0000 ) >> 8;

        b4 = ( i & 0xFF000000 ) >>> 24;

        i = ( b1 | b2 | b3 | b4 );

        return i;

    }

    /**

     * big2little

     * Protected helper method to swap the order of bytes in a 32 bit int

     * @param int

     * @return 32 bits swapped value

     */

    protected int big2little(int i) {

        int b1, b2, b3, b4 ;

        b1 = ( i & 0xFF ) << 24 ;

        b2 = ( i & 0xFF00 ) << 8;

        b3 = ( i & 0xFF0000 ) >> 8;

        b4 = ( i & 0xFF000000 ) >>> 24;

        i = ( b1 | b2 | b3 | b4 );

        return i;

    }

    /**

     * rlshort

     * Protected helper method to read 16 bits value. Swap high with low byte.

     * @param DataInputStream

     * @return the swapped value.

     * @exception IOException

     */

    protected short rlshort(DataInputStream dis)  throws IOException {

        short s=0;

        short high, low;

        s = dis.readShort();

        high = (short)(( s & 0xFF ) << 8) ;

        low = (short)(( s & 0xFF00 ) >>> 8);

        s = (short)( high | low );

        return s;

    }

    /**

     * big2little

     * Protected helper method to swap the order of bytes in a 16 bit short

     * @param int

     * @return 16 bits swapped value

     */

    protected short big2littleShort(short i) {

        short high, low;

        high = (short)(( i & 0xFF ) << 8) ;

        low = (short)(( i & 0xFF00 ) >>> 8);

        i = (short)( high | low );

        return i;

    }

    /**

     * InputStream wrapper class which prevent source stream from being closed.

     * The class is usefull for use with SequenceInputStream to prevent

     * closing of the source input streams.

     */

    protected class NoCloseInputStream extends InputStream {

        private final InputStream in;

        public NoCloseInputStream(InputStream in) {

            this.in = in;

        }

        @Override

        public int read() throws IOException {

            return in.read();

        }

        @Override

        public int read(byte b[]) throws IOException {

            return in.read(b);

        }

        @Override

        public int read(byte b[], int off, int len) throws IOException {

            return in.read(b, off, len);

        }

        @Override

        public long skip(long n) throws IOException {

            return in.skip(n);

        }

        @Override

        public int available() throws IOException {

            return in.available();

        }

        @Override

        public void close() throws IOException {

            // don't propagate the call

        }

        @Override

        public void mark(int readlimit) {

            in.mark(readlimit);

        }

        @Override

        public void reset() throws IOException {

            in.reset();

        }

        @Override

        public boolean markSupported() {

            return in.markSupported();

        }

    }

}