src/mediainfo.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Simple x264 Launcher
   3 // Copyright (C) 2004-2016 LoRd_MuldeR <MuldeR2@GMX.de>
   4 //
   5 // This program is free software; you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation; either version 2 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License along
  16 // with this program; if not, write to the Free Software Foundation, Inc.,
  17 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 //
  19 // http://www.gnu.org/licenses/gpl-2.0.txt
  20 ///////////////////////////////////////////////////////////////////////////////
  21
  22 #include "mediainfo.h"
  23
  24 #include <QString>
  25 #include <QFile>
  26 #include <QByteArray>
  27 #include <QFileInfo>
  28
  29 static const char *YUV4MPEG2 = "YUV4MPEG2";
  30
  31 int MediaInfo::analyze(const QString &fileName)
  32 {
  33         const QString suffix = QFileInfo(fileName).suffix();
  34
  35         //Try to guess Avisynth or VapourSynth from the file extension first!
  36         if((suffix.compare("avs", Qt::CaseInsensitive) == 0) || (suffix.compare("avsi", Qt::CaseInsensitive) == 0))
  37         {
  38                 return FILETYPE_AVISYNTH;
  39         }
  40         if((suffix.compare("vpy", Qt::CaseInsensitive) == 0) || (suffix.compare("py", Qt::CaseInsensitive) == 0))
  41         {
  42                 return FILETYPE_VAPOURSYNTH;
  43         }
  44
  45         //Check for YUV4MEPG2 format next
  46         if(isYuv4Mpeg(fileName))
  47         {
  48                 return FILETYPE_YUV4MPEG2;
  49         }
  50
  51         //Unknown file type
  52         return FILETYPE_UNKNOWN;
  53 }
  54
  55 bool MediaInfo::isYuv4Mpeg(const QString &fileName)
  56 {
  57         QFile testFile(fileName);
  58
  59         //Try to open test file
  60         if(!testFile.open(QIODevice::ReadOnly))
  61         {
  62                 qWarning("[isYuv4Mpeg] Failed to open input file!");
  63                 return false;
  64         }
  65
  66         //Read file header
  67         const size_t len = strlen(YUV4MPEG2);
  68         QByteArray header = testFile.read(len);
  69         testFile.close();
  70
  71         //Did we read enough header bytes?
  72         if(len != header.size())
  73         {
  74                 qWarning("[isYuv4Mpeg] File is too short to be analyzed!");
  75                 return false;
  76         }
  77
  78         //Compare YUV4MPEG2 signature
  79         return (memcmp(header.constData(), YUV4MPEG2, len) == 0);
  80 }