1 /***************************************************************************
2 copyright : (C) 2002 - 2008 by Scott Wheeler
3 email : wheeler@kde.org
4 ***************************************************************************/
6 /***************************************************************************
7 * This library is free software; you can redistribute it and/or modify *
8 * it under the terms of the GNU Lesser General Public License version *
9 * 2.1 as published by the Free Software Foundation. *
11 * This library is distributed in the hope that it will be useful, but *
12 * WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
14 * Lesser General Public License for more details. *
16 * You should have received a copy of the GNU Lesser General Public *
17 * License along with this library; if not, write to the Free Software *
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
21 * Alternatively, this file is available under the Mozilla Public *
22 * License Version 1.1. You may obtain a copy of the License at *
23 * http://www.mozilla.org/MPL/ *
24 ***************************************************************************/
28 #include "id3v2synchdata.h"
30 using namespace TagLib;
31 using namespace ID3v2;
33 TagLib::uint SynchData::toUInt(const ByteVector &data)
36 bool notSynchSafe = false;
37 int last = data.size() > 4 ? 3 : data.size() - 1;
39 for(int i = 0; i <= last; i++) {
45 sum |= (data[i] & 0x7f) << ((last - i) * 7);
49 // Invalid data; assume this was created by some buggy software that just
50 // put normal integers here rather than syncsafe ones, and try it that
52 sum = (data.size() > 4) ? data.mid(0, 4).toUInt() : data.toUInt();
58 ByteVector SynchData::fromUInt(uint value)
62 for(int i = 0; i < 4; i++)
63 v[i] = uchar(value >> ((3 - i) * 7) & 0x7f);
68 ByteVector SynchData::decode(const ByteVector &data)
70 ByteVector result = data;
72 ByteVector pattern(2, char(0));
76 return result.replace(pattern, '\xFF');