/*
 * Copyright (c) 1999, 2019, 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
/** * 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 */ static final int AU_DOUBLE = 7; /* 64-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.
/** * 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; } else if (format.getSampleSizeInBits() == 64) { auType = AU_DOUBLE; } } } public int getAuType() { return auType; } }