1 /*
   2  * Copyright (c) 1999, 2013, 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

  57      * Swaps bytes.
  58      * @throws ArrayOutOfBoundsException if len is not a multiple of 2.
  59      */
  60     static void getByteSwapped(byte[] b, int off, int len) {
  61 
  62         byte tempByte;
  63         for (int i = off; i < (off+len); i+=2) {
  64 
  65             tempByte = b[i];
  66             b[i] = b[i+1];
  67             b[i+1] = tempByte;
  68         }
  69     }
  70 
  71 
  72     /**
  73      * Linear to DB scale conversion.
  74      */
  75     static float linearToDB(float linear) {
  76 
  77         float dB = (float) (Math.log((double)((linear==0.0)?0.0001:linear))/Math.log(10.0) * 20.0);
  78         return dB;
  79     }
  80 
  81 
  82     /**
  83      * DB to linear scale conversion.
  84      */
  85     static float dBToLinear(float dB) {
  86 
  87         float linear = (float) Math.pow(10.0, dB/20.0);
  88         return linear;
  89     }
  90 
  91     /*
  92      * returns bytes aligned to a multiple of blocksize
  93      * the return value will be in the range of (bytes-blocksize+1) ... bytes
  94      */
  95     static long align(long bytes, int blockSize) {
  96         // prevent null pointers
  97         if (blockSize <= 1) {

   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

  57      * Swaps bytes.
  58      * @throws ArrayOutOfBoundsException if len is not a multiple of 2.
  59      */
  60     static void getByteSwapped(byte[] b, int off, int len) {
  61 
  62         byte tempByte;
  63         for (int i = off; i < (off+len); i+=2) {
  64 
  65             tempByte = b[i];
  66             b[i] = b[i+1];
  67             b[i+1] = tempByte;
  68         }
  69     }
  70 
  71 
  72     /**
  73      * Linear to DB scale conversion.
  74      */
  75     static float linearToDB(float linear) {
  76 
  77         float dB = (float) (Math.log(((linear==0.0)?0.0001:linear))/Math.log(10.0) * 20.0);
  78         return dB;
  79     }
  80 
  81 
  82     /**
  83      * DB to linear scale conversion.
  84      */
  85     static float dBToLinear(float dB) {
  86 
  87         float linear = (float) Math.pow(10.0, dB/20.0);
  88         return linear;
  89     }
  90 
  91     /*
  92      * returns bytes aligned to a multiple of blocksize
  93      * the return value will be in the range of (bytes-blocksize+1) ... bytes
  94      */
  95     static long align(long bytes, int blockSize) {
  96         // prevent null pointers
  97         if (blockSize <= 1) {