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
37 */
38 public final class Toolkit {
39
40 /**
41 * Suppresses default constructor, ensuring non-instantiability.
42 */
43 private Toolkit() {
44 }
45
46 /**
47 * Converts bytes from signed to unsigned.
48 */
49 static void getUnsigned8(byte[] b, int off, int len) {
50 for (int i = off; i < (off+len); i++) {
51 b[i] += 128;
52 }
53 }
54
55 /**
56 * Swaps bytes.
57 * @throws ArrayOutOfBoundsException if len is not a multiple of 2.
58 */
59 static void getByteSwapped(byte[] b, int off, int len) {
60
61 byte tempByte;
62 for (int i = off; i < (off+len); i+=2) {
63
64 tempByte = b[i];
65 b[i] = b[i+1];
66 b[i+1] = tempByte;
67 }
68 }
69
70 /**
71 * Linear to DB scale conversion.
72 */
73 static float linearToDB(float linear) {
74
75 float dB = (float) (Math.log(((linear==0.0)?0.0001:linear))/Math.log(10.0) * 20.0);
76 return dB;
77 }
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1 /*
2 * Copyright (c) 1999, 2017, 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
37 */
38 public final class Toolkit {
39
40 /**
41 * Suppresses default constructor, ensuring non-instantiability.
42 */
43 private Toolkit() {
44 }
45
46 /**
47 * Converts bytes from signed to unsigned.
48 */
49 static void getUnsigned8(byte[] b, int off, int len) {
50 for (int i = off; i < (off+len); i++) {
51 b[i] += 128;
52 }
53 }
54
55 /**
56 * Swaps bytes.
57 * @throws ArrayIndexOutOfBoundsException if len is not a multiple of 2.
58 */
59 static void getByteSwapped(byte[] b, int off, int len) {
60
61 byte tempByte;
62 for (int i = off; i < (off+len); i+=2) {
63
64 tempByte = b[i];
65 b[i] = b[i+1];
66 b[i+1] = tempByte;
67 }
68 }
69
70 /**
71 * Linear to DB scale conversion.
72 */
73 static float linearToDB(float linear) {
74
75 float dB = (float) (Math.log(((linear==0.0)?0.0001:linear))/Math.log(10.0) * 20.0);
76 return dB;
77 }
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