/*

 * 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

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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 StandardFileFormat {

    // magic numbers

    static final int AU_SUN_MAGIC = 0x2e736e64; // ".snd"

    // 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 */

//  we don't support these ...

//  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;

    /**

     * According the specification of AU file format this is the value for

     * length field if length is not known. This is a maximum possible value for

     * the unsigned int.

     */

    static final long /*unsigned int */ UNKNOWN_SIZE = 0xffffffffL;

    private int auType;

    AuFileFormat(final AudioFileFormat.Type type, final long byteLength,

                 final AudioFormat format, final long frameLength) {

        super(type, byteLength, format, frameLength);

        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;

            }

        } else if (AudioFormat.Encoding.PCM_FLOAT.equals(encoding)) {

            if (format.getSampleSizeInBits() == 32) {

                auType = AU_FLOAT;

            }

        }

    }

    public int getAuType() {

        return auType;

    }

}