/*
* Copyright 1990-2009 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
package com.sun.mmedia;
/**
* Utility class that provides various array conversion
*
*/
public final class FormatConversionUtils {
/**
* Private constructor to prevent instantiation
*/
private FormatConversionUtils(){}
/**
* Converts image int[] array (32-bit per pixel)
* to byte[] xRGB array (4 bytes per pixel)
* int<->byte[4] conversion is platform specific !
*
* @param ints integer array to convert
* @return same array but converted to byte[] (in big-endian format)
*/
public static byte[] intArrayToByteArray(int[] ints) {
if (ints == null) return null;
byte[] bytes = new byte[ints.length * 4];
int intcount, bytecount;
for (intcount = 0, bytecount = 0; intcount < ints.length; ) {
bytes[bytecount++] = (byte)((ints[intcount] & 0xFF000000) >> 24);
bytes[bytecount++] = (byte)((ints[intcount] & 0x00FF0000) >> 16);
bytes[bytecount++] = (byte)((ints[intcount] & 0x0000FF00) >> 8);
bytes[bytecount++] = (byte)((ints[intcount] & 0x000000FF) );
intcount++;
}
return bytes;
}
/**
* Converts image byte[] xRGB array (4 bytes per pixel)
* to int[] array (32-bit per pixel),
* int<->byte[4] conversion is platform specific !
*
* @param bytes byte array to convert
* @return same array but converted to int[] (in big-endian format)
*/
public static int[] byteArrayToIntArray(byte[] bytes) {
if (bytes == null) return null;
int[] ints = new int[bytes.length / 4];
int intcount, bytecount;
for (intcount = 0, bytecount = 0; bytecount < bytes.length; ) {
ints[intcount] =
(( ((int)(bytes[bytecount + 0])) << 24) & 0xFF000000) | //A
(( ((int)(bytes[bytecount + 1])) << 16) & 0x00FF0000) | //R
(( ((int)(bytes[bytecount + 2])) << 8) & 0x0000FF00) | //G
(( ((int)(bytes[bytecount + 3])) ) & 0x000000FF); //B
intcount++;
bytecount+=4;
}
return ints;
}
/**
* Creates a copy of a string array.
* Primary usage of this method is to create copies of
* preset, parameter, metadata and other arrays, returned to user.
*
* @param array String array to copy
* @return copy of array
*/
public static String[] stringArrayCopy(String[] array) {
if (array == null) return null;
String[] copy = new String[array.length];
System.arraycopy(array, 0, copy, 0, array.length);
return copy;
}
}