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
26 package com.sun.media.sound;
27
28 import javax.sound.sampled.AudioFileFormat;
29 import javax.sound.sampled.AudioFormat;
30
31 /**
32 * WAVE file format class.
33 *
34 * @author Jan Borgersen
35 */
36 final class WaveFileFormat extends StandardFileFormat {
37
38 /**
39 * Wave format type.
40 */
41 private final int waveType;
42
43 //$$fb 2001-07-13: added management of header size in this class
44 //$$fb 2002-04-16: Fix for 4636355: RIFF audio headers could be _more_ spec compliant
45 private static final int STANDARD_HEADER_SIZE = 28;
46
47 //$$fb 2002-04-16: Fix for 4636355: RIFF audio headers could be _more_ spec compliant
48 /**
49 * fmt_ chunk size in bytes
50 */
51 private static final int STANDARD_FMT_CHUNK_SIZE = 16;
52
53 // magic numbers
54 static final int RIFF_MAGIC = 1380533830;
55 static final int WAVE_MAGIC = 1463899717;
56 static final int FMT_MAGIC = 0x666d7420; // "fmt "
57 static final int DATA_MAGIC = 0x64617461; // "data"
58
59 // encodings
60 static final int WAVE_FORMAT_UNKNOWN = 0x0000;
61 static final int WAVE_FORMAT_PCM = 0x0001;
62 static final int WAVE_FORMAT_ADPCM = 0x0002;
63 static final int WAVE_FORMAT_IEEE_FLOAT= 0x0003;
64 static final int WAVE_FORMAT_ALAW = 0x0006;
65 static final int WAVE_FORMAT_MULAW = 0x0007;
66 static final int WAVE_FORMAT_OKI_ADPCM = 0x0010;
67 static final int WAVE_FORMAT_DIGISTD = 0x0015;
68 static final int WAVE_FORMAT_DIGIFIX = 0x0016;
69 static final int WAVE_IBM_FORMAT_MULAW = 0x0101;
70 static final int WAVE_IBM_FORMAT_ALAW = 0x0102;
71 static final int WAVE_IBM_FORMAT_ADPCM = 0x0103;
72 static final int WAVE_FORMAT_DVI_ADPCM = 0x0011;
73 static final int WAVE_FORMAT_SX7383 = 0x1C07;
74 static final int WAVE_FORMAT_EXTENSIBLE= 0xFFFE;
75
76 WaveFileFormat(final AudioFileFormat.Type type, final long byteLength,
77 final AudioFormat format, final long frameLength) {
78 super(type, byteLength, format, frameLength);
79
80 AudioFormat.Encoding encoding = format.getEncoding();
81
82 if( encoding.equals(AudioFormat.Encoding.ALAW) ) {
83 waveType = WAVE_FORMAT_ALAW;
84 } else if( encoding.equals(AudioFormat.Encoding.ULAW) ) {
85 waveType = WAVE_FORMAT_MULAW;
86 } else if( encoding.equals(AudioFormat.Encoding.PCM_SIGNED) ||
87 encoding.equals(AudioFormat.Encoding.PCM_UNSIGNED) ) {
88 waveType = WAVE_FORMAT_PCM;
89 } else {
90 waveType = WAVE_FORMAT_UNKNOWN;
91 }
92 }
93
94 int getWaveType() {
95 return waveType;
96 }
97
98 int getHeaderSize() {
99 return getHeaderSize(getWaveType());
100 }
101
102 static int getHeaderSize(int waveType) {
103 //$$fb 2002-04-16: Fix for 4636355: RIFF audio headers could be _more_ spec compliant
104 // use dynamic format chunk size
105 return STANDARD_HEADER_SIZE + getFmtChunkSize(waveType);
106 }
107
108 static int getFmtChunkSize(int waveType) {
109 //$$fb 2002-04-16: Fix for 4636355: RIFF audio headers could be _more_ spec compliant
110 // add 2 bytes for "codec specific data length" for non-PCM codecs
111 int result = STANDARD_FMT_CHUNK_SIZE;
112 if (waveType != WAVE_FORMAT_PCM) {
113 result += 2; // WORD for "codec specific data length"
114 }
115 return result;
116 }
117 }