Java example source code file (AuFileFormat.java)

This example Java source code file (AuFileFormat.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

adpcm, au_alaw_8, au_linear_16, au_linear_24, au_linear_32, au_linear_8, au_sun_magic, au_ulaw_8, audiofileformat, aufileformat, ccitt, ieee, isdn, pcm

The AuFileFormat.java Java example source code

/*
 * 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 com.sun.media.sound;


import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioFormat;


/**
 * AU file format.
 *
 * @author Jan Borgersen
 */

final class AuFileFormat extends AudioFileFormat {

    // magic numbers
    static final int AU_SUN_MAGIC =     0x2e736e64;
    static final int AU_SUN_INV_MAGIC = 0x646e732e;
    static final int AU_DEC_MAGIC =         0x2e736400;
    static final int AU_DEC_INV_MAGIC = 0x0064732e;

    // encodings
    static final int AU_ULAW_8       = 1;  /* 8-bit ISDN u-law */
    static final int AU_LINEAR_8     = 2;  /* 8-bit linear PCM */
    static final int AU_LINEAR_16    = 3;  /* 16-bit linear PCM */
    static final int AU_LINEAR_24    = 4;  /* 24-bit linear PCM */
    static final int AU_LINEAR_32    = 5;  /* 32-bit linear PCM */
    static final int AU_FLOAT        = 6;  /* 32-bit IEEE floating point */
    static final int AU_DOUBLE       = 7;  /* 64-bit IEEE floating point */
    static final int AU_ADPCM_G721   = 23; /* 4-bit CCITT g.721 ADPCM */
    static final int AU_ADPCM_G722   = 24; /* CCITT g.722 ADPCM */
    static final int AU_ADPCM_G723_3 = 25; /* CCITT g.723 3-bit ADPCM */
    static final int AU_ADPCM_G723_5 = 26; /* CCITT g.723 5-bit ADPCM */
    static final int AU_ALAW_8       = 27; /* 8-bit ISDN A-law */

    static final int AU_HEADERSIZE       = 24;

    private int auType;

    AuFileFormat( AudioFileFormat aff ) {

        this( aff.getType(), aff.getByteLength(), aff.getFormat(), aff.getFrameLength() );
    }

    AuFileFormat(AudioFileFormat.Type type, int lengthInBytes, AudioFormat format, int lengthInFrames) {

        super(type,lengthInBytes,format,lengthInFrames);

        AudioFormat.Encoding encoding = format.getEncoding();

        auType = -1;

        if( AudioFormat.Encoding.ALAW.equals(encoding) ) {
            if( format.getSampleSizeInBits()==8 ) {
                auType = AU_ALAW_8;
            }
        } else if( AudioFormat.Encoding.ULAW.equals(encoding) ) {
            if( format.getSampleSizeInBits()==8 ) {
                auType = AU_ULAW_8;
            }
        } else if( AudioFormat.Encoding.PCM_SIGNED.equals(encoding) ) {
            if( format.getSampleSizeInBits()==8 ) {
                auType = AU_LINEAR_8;
            } else if( format.getSampleSizeInBits()==16 ) {
                auType = AU_LINEAR_16;
            } else if( format.getSampleSizeInBits()==24 ) {
                auType = AU_LINEAR_24;
            } else if( format.getSampleSizeInBits()==32 ) {
                auType = AU_LINEAR_32;
            }
        }

    }

    public int getAuType() {

        return auType;
    }

}