/**
* This file is part of muCommander, http://www.mucommander.com
* Copyright (C) 2002-2016 Maxence Bernard
*
* muCommander is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* muCommander 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.mucommander.commons.file.archive.iso;
import com.mucommander.commons.file.AbstractFile;
/**
* @author Xavier Martin
*/
class IsoUtil {
static final int MODE1_2048 = 2048;
static final int MODE2_2352 = 2352;
static final int MODE2_2336 = 2336;
static final int MODE2_2352_skip = 24;
static final int MODE2_2336_skip = 8;
static final int MODE2_EC_skip = 280;
static final int WAV_header = 44;
public static int guessSectorSize(AbstractFile file) {
int sectSize = MODE1_2048;
// cooked images are usually 2352 bytes/sector, so it's 1st check here
if (file.getSize() % MODE2_2352 == 0)
sectSize = MODE2_2352;
else if (file.getSize() % MODE2_2336 == 0)
sectSize = MODE2_2336;
return sectSize;
}
public static int toDwordBE(byte p[], int offset) {
return ((p[offset] & 0xff)
| ((p[1 + offset] & 0xff) << 8)
| ((p[2 + offset] & 0xff) << 16)
| ((p[3 + offset] & 0xff) << 24));
}
public static int toDword(byte p[], int offset) {
return ((p[3 + offset] & 0xff)
| ((p[2 + offset] & 0xff) << 8)
| ((p[1 + offset] & 0xff) << 16)
| ((p[offset] & 0xff) << 24));
}
public static void toArray(int value, byte b[], int offset) {
b[offset] = (byte) (value & 0xff);
b[offset + 1] = (byte) ((value & 0xff00) >> 8);
b[offset + 2] = (byte) ((value & 0xff0000) >> 16);
b[offset + 3] = (byte) ((value & 0xff000000) >> 24);
}
public static long offsetInSector(long index, int sectSize, boolean audio) {
switch (sectSize) {
case MODE2_2352:
return (index * 2352) + (audio ? 0 : 24);
case MODE2_2336:
return (index * 2336) + 8;
}
return index << 11;
}
}