1 /*
2 * Copyright (c) 1999, 2014, 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 java.io.IOException;
29
30 import java.util.Vector;
31
32 import javax.sound.sampled.AudioFormat;
33 import javax.sound.sampled.AudioSystem;
34 import javax.sound.sampled.AudioInputStream;
35
36
37 /**
38 * U-law encodes linear data, and decodes u-law data to linear data.
39 *
40 * @author Kara Kytle
41 */
42 public final class UlawCodec extends SunCodec {
43
44 /* Tables used for U-law decoding */
45
46 private final static byte[] ULAW_TABH = new byte[256];
47 private final static byte[] ULAW_TABL = new byte[256];
48
49 private static final AudioFormat.Encoding[] ulawEncodings = {AudioFormat.Encoding.ULAW,
89 } else {
90 return new AudioFormat.Encoding[0];
91 }
92 } else if (AudioFormat.Encoding.ULAW.equals(sourceFormat.getEncoding())) {
93 if (sourceFormat.getSampleSizeInBits() == 8) {
94 AudioFormat.Encoding enc[] = new AudioFormat.Encoding[1];
95 enc[0] = AudioFormat.Encoding.PCM_SIGNED;
96 return enc;
97 } else {
98 return new AudioFormat.Encoding[0];
99 }
100 } else {
101 return new AudioFormat.Encoding[0];
102 }
103 }
104
105
106 /**
107 */
108 public AudioFormat[] getTargetFormats(AudioFormat.Encoding targetEncoding, AudioFormat sourceFormat){
109 if( (AudioFormat.Encoding.PCM_SIGNED.equals(targetEncoding)
110 && AudioFormat.Encoding.ULAW.equals(sourceFormat.getEncoding()))
111 ||
112 (AudioFormat.Encoding.ULAW.equals(targetEncoding)
113 && AudioFormat.Encoding.PCM_SIGNED.equals(sourceFormat.getEncoding()))) {
114 return getOutputFormats(sourceFormat);
115 } else {
116 return new AudioFormat[0];
117 }
118 }
119
120 /**
121 */
122 public AudioInputStream getAudioInputStream(AudioFormat.Encoding targetEncoding, AudioInputStream sourceStream){
123 AudioFormat sourceFormat = sourceStream.getFormat();
124 AudioFormat.Encoding sourceEncoding = sourceFormat.getEncoding();
125
126 if (sourceEncoding.equals(targetEncoding)) {
127 return sourceStream;
128 } else {
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1 /*
2 * Copyright (c) 1999, 2015, 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 java.io.IOException;
29
30 import java.util.Objects;
31 import java.util.Vector;
32
33 import javax.sound.sampled.AudioFormat;
34 import javax.sound.sampled.AudioSystem;
35 import javax.sound.sampled.AudioInputStream;
36
37
38 /**
39 * U-law encodes linear data, and decodes u-law data to linear data.
40 *
41 * @author Kara Kytle
42 */
43 public final class UlawCodec extends SunCodec {
44
45 /* Tables used for U-law decoding */
46
47 private final static byte[] ULAW_TABH = new byte[256];
48 private final static byte[] ULAW_TABL = new byte[256];
49
50 private static final AudioFormat.Encoding[] ulawEncodings = {AudioFormat.Encoding.ULAW,
90 } else {
91 return new AudioFormat.Encoding[0];
92 }
93 } else if (AudioFormat.Encoding.ULAW.equals(sourceFormat.getEncoding())) {
94 if (sourceFormat.getSampleSizeInBits() == 8) {
95 AudioFormat.Encoding enc[] = new AudioFormat.Encoding[1];
96 enc[0] = AudioFormat.Encoding.PCM_SIGNED;
97 return enc;
98 } else {
99 return new AudioFormat.Encoding[0];
100 }
101 } else {
102 return new AudioFormat.Encoding[0];
103 }
104 }
105
106
107 /**
108 */
109 public AudioFormat[] getTargetFormats(AudioFormat.Encoding targetEncoding, AudioFormat sourceFormat){
110 Objects.requireNonNull(targetEncoding);
111 Objects.requireNonNull(sourceFormat);
112 if( (AudioFormat.Encoding.PCM_SIGNED.equals(targetEncoding)
113 && AudioFormat.Encoding.ULAW.equals(sourceFormat.getEncoding()))
114 ||
115 (AudioFormat.Encoding.ULAW.equals(targetEncoding)
116 && AudioFormat.Encoding.PCM_SIGNED.equals(sourceFormat.getEncoding()))) {
117 return getOutputFormats(sourceFormat);
118 } else {
119 return new AudioFormat[0];
120 }
121 }
122
123 /**
124 */
125 public AudioInputStream getAudioInputStream(AudioFormat.Encoding targetEncoding, AudioInputStream sourceStream){
126 AudioFormat sourceFormat = sourceStream.getFormat();
127 AudioFormat.Encoding sourceEncoding = sourceFormat.getEncoding();
128
129 if (sourceEncoding.equals(targetEncoding)) {
130 return sourceStream;
131 } else {
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