mpegutils.h

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00001 /***************************************************************************
00002     copyright            : (C) 2015 by Tsuda Kageyu
00003     email                : tsuda.kageyu@gmail.com
00004  ***************************************************************************/
00005 
00006 /***************************************************************************
00007  *   This library is free software; you can redistribute it and/or modify  *
00008  *   it under the terms of the GNU Lesser General Public License version   *
00009  *   2.1 as published by the Free Software Foundation.                     *
00010  *                                                                         *
00011  *   This library is distributed in the hope that it will be useful, but   *
00012  *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
00013  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
00014  *   Lesser General Public License for more details.                       *
00015  *                                                                         *
00016  *   You should have received a copy of the GNU Lesser General Public      *
00017  *   License along with this library; if not, write to the Free Software   *
00018  *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA         *
00019  *   02110-1301  USA                                                       *
00020  *                                                                         *
00021  *   Alternatively, this file is available under the Mozilla Public        *
00022  *   License Version 1.1.  You may obtain a copy of the License at         *
00023  *   http://www.mozilla.org/MPL/                                           *
00024  ***************************************************************************/
00025 
00026 #ifndef TAGLIB_MPEGUTILS_H
00027 #define TAGLIB_MPEGUTILS_H
00028 
00029 // THIS FILE IS NOT A PART OF THE TAGLIB API
00030 
00031 #ifndef DO_NOT_DOCUMENT  // tell Doxygen not to document this header
00032 
00033 namespace TagLib
00034 {
00035   namespace MPEG
00036   {
00037     namespace
00038     {
00039 
00045       inline bool firstSyncByte(unsigned char byte)
00046       {
00047         return (byte == 0xFF);
00048       }
00049 
00050       inline bool secondSynchByte(unsigned char byte)
00051       {
00052         // 0xFF is possible in theory, but it's very unlikely be a header.
00053 
00054         return (byte != 0xFF && ((byte & 0xE0) == 0xE0));
00055       }
00056 
00057     }
00058   }
00059 }
00060 
00061 #endif
00062 
00063 #endif