1/*
2 * Copyright (c) 1999, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package com.sun.media.sound;
27
28import javax.sound.sampled.AudioFileFormat;
29import javax.sound.sampled.AudioFormat;
30
31/**
32 * AU file format.
33 *
34 * @author Jan Borgersen
35 */
36final class AuFileFormat extends StandardFileFormat {
37
38    // magic numbers
39    static final int AU_SUN_MAGIC = 0x2e736e64; // ".snd"
40
41    // encodings
42    static final int AU_ULAW_8       = 1;  /* 8-bit ISDN u-law */
43    static final int AU_LINEAR_8     = 2;  /* 8-bit linear PCM */
44    static final int AU_LINEAR_16    = 3;  /* 16-bit linear PCM */
45    static final int AU_LINEAR_24    = 4;  /* 24-bit linear PCM */
46    static final int AU_LINEAR_32    = 5;  /* 32-bit linear PCM */
47    static final int AU_FLOAT        = 6;  /* 32-bit IEEE floating point */
48//  we don't support these ...
49//  static final int AU_DOUBLE       = 7;  /* 64-bit IEEE floating point */
50//  static final int AU_ADPCM_G721   = 23; /* 4-bit CCITT g.721 ADPCM */
51//  static final int AU_ADPCM_G722   = 24; /* CCITT g.722 ADPCM */
52//  static final int AU_ADPCM_G723_3 = 25; /* CCITT g.723 3-bit ADPCM */
53//  static final int AU_ADPCM_G723_5 = 26; /* CCITT g.723 5-bit ADPCM */
54    static final int AU_ALAW_8       = 27; /* 8-bit ISDN A-law */
55
56    static final int AU_HEADERSIZE       = 24;
57
58    /**
59     * According the specification of AU file format this is the value for
60     * length field if length is not known. This is a maximum possible value for
61     * the unsigned int.
62     */
63    static final long /*unsigned int */ UNKNOWN_SIZE = 0xffffffffL;
64
65    private int auType;
66
67    AuFileFormat(final AudioFileFormat.Type type, final long byteLength,
68                 final AudioFormat format, final long frameLength) {
69        super(type, byteLength, format, frameLength);
70
71        AudioFormat.Encoding encoding = format.getEncoding();
72
73        auType = -1;
74
75        if (AudioFormat.Encoding.ALAW.equals(encoding)) {
76            if (format.getSampleSizeInBits() == 8) {
77                auType = AU_ALAW_8;
78            }
79        } else if (AudioFormat.Encoding.ULAW.equals(encoding)) {
80            if (format.getSampleSizeInBits() == 8) {
81                auType = AU_ULAW_8;
82            }
83        } else if (AudioFormat.Encoding.PCM_SIGNED.equals(encoding)) {
84            if (format.getSampleSizeInBits() == 8) {
85                auType = AU_LINEAR_8;
86            } else if (format.getSampleSizeInBits() == 16) {
87                auType = AU_LINEAR_16;
88            } else if (format.getSampleSizeInBits() == 24) {
89                auType = AU_LINEAR_24;
90            } else if (format.getSampleSizeInBits() == 32) {
91                auType = AU_LINEAR_32;
92            }
93        } else if (AudioFormat.Encoding.PCM_FLOAT.equals(encoding)) {
94            if (format.getSampleSizeInBits() == 32) {
95                auType = AU_FLOAT;
96            }
97        }
98    }
99
100    public int getAuType() {
101        return auType;
102    }
103}
104