src/Tool_Abstract.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // LameXP - Audio Encoder Front-End
   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, but always including the *additional*
   9 // restrictions defined in the "License.txt" file.
  10 //
  11 // This program is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License along
  17 // with this program; if not, write to the Free Software Foundation, Inc.,
  18 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 //
  20 // http://www.gnu.org/licenses/gpl-2.0.txt
  21 ///////////////////////////////////////////////////////////////////////////////
  22
  23 #include "Tool_Abstract.h"
  24
  25 //Internal
  26 #include "Global.h"
  27
  28 //MUtils
  29 #include <MUtils/Global.h>
  30 #include <MUtils/OSSupport.h>
  31 #include <MUtils/JobObject.h>
  32
  33 //Qt
  34 #include <QProcess>
  35 #include <QMutex>
  36 #include <QMutexLocker>
  37 #include <QProcessEnvironment>
  38 #include <QDir>
  39 #include <QElapsedTimer>
  40
  41 /*
  42  * Static Objects
  43  */
  44 QScopedPointer<MUtils::JobObject> AbstractTool::s_jobObjectInstance;
  45 QScopedPointer<QElapsedTimer>     AbstractTool::s_startProcessTimer;
  46
  47 /*
  48  * Synchronization
  49  */
  50 QMutex AbstractTool::s_startProcessMutex;
  51 QMutex AbstractTool::s_createObjectMutex;
  52
  53 /*
  54  * Ref Counter
  55  */
  56 quint64 AbstractTool::s_referenceCounter = 0ui64;
  57
  58 /*
  59  * Const
  60  */
  61 static const qint64 START_DELAY = 64i64;        //in milliseconds
  62
  63 /*
  64  * Constructor
  65  */
  66 AbstractTool::AbstractTool(void)
  67 :
  68         m_firstLaunch(true)
  69
  70 {
  71         QMutexLocker lock(&s_createObjectMutex);
  72
  73         if(s_referenceCounter++ == 0)
  74         {
  75                 s_jobObjectInstance.reset(new MUtils::JobObject());
  76                 s_startProcessTimer.reset(new QElapsedTimer());
  77                 if(!MUtils::OS::setup_timer_resolution())
  78                 {
  79                         qWarning("Failed to setup system timer resolution!");
  80                 }
  81         }
  82 }
  83
  84 /*
  85  * Destructor
  86  */
  87 AbstractTool::~AbstractTool(void)
  88 {
  89         QMutexLocker lock(&s_createObjectMutex);
  90
  91         if(--s_referenceCounter == 0)
  92         {
  93                 s_jobObjectInstance.reset(NULL);
  94                 s_startProcessTimer.reset(NULL);
  95                 if(!MUtils::OS::reset_timer_resolution())
  96                 {
  97                         qWarning("Failed to reset system timer resolution!");
  98                 }
  99         }
 100 }
 101
 102 /*
 103  * Initialize and launch process object
 104  */
 105 bool AbstractTool::startProcess(QProcess &process, const QString &program, const QStringList &args, const QString &workingDir)
 106 {
 107         QMutexLocker lock(&s_startProcessMutex);
 108
 109         if((!s_startProcessTimer.isNull()) && s_startProcessTimer->isValid())
 110         {
 111                 qint64 elapsed = s_startProcessTimer->elapsed();
 112                 while(elapsed < START_DELAY)
 113                 {
 114                         lock.unlock();
 115                         MUtils::OS::sleep_ms((size_t)(START_DELAY - elapsed));
 116                         lock.relock();
 117                         elapsed = s_startProcessTimer->elapsed();
 118                 }
 119         }
 120
 121         emit messageLogged(commandline2string(program, args) + "\n");
 122         MUtils::init_process(process, workingDir.isEmpty() ? QFileInfo(program).absolutePath() : workingDir);
 123
 124         process.start(program, args);
 125
 126         if(process.waitForStarted())
 127         {
 128                 if(!s_jobObjectInstance.isNull())
 129                 {
 130                         if(!s_jobObjectInstance->addProcessToJob(&process))
 131                         {
 132                                 qWarning("Failed to assign process to job object!");
 133                         }
 134                 }
 135
 136                 MUtils::OS::change_process_priority(&process, -1);
 137
 138                 if(m_firstLaunch)
 139                 {
 140                         emit statusUpdated(0);
 141                         m_firstLaunch = false;
 142                 }
 143
 144                 s_startProcessTimer->start();
 145                 return true;
 146         }
 147
 148         emit messageLogged("Process creation has failed :-(");
 149         QString errorMsg= process.errorString().trimmed();
 150         if(!errorMsg.isEmpty()) emit messageLogged(errorMsg);
 151
 152         process.kill();
 153         process.waitForFinished(-1);
 154
 155         s_startProcessTimer->start();
 156         return false;
 157 }
 158
 159 /*
 160  * Convert program arguments to single string
 161  */
 162 QString AbstractTool::commandline2string(const QString &program, const QStringList &arguments)
 163 {
 164         QString commandline = (program.contains(' ') ? QString("\"%1\"").arg(program) : program);
 165
 166         for(int i = 0; i < arguments.count(); i++)
 167         {
 168                 commandline += (arguments.at(i).contains(' ') ? QString(" \"%1\"").arg(arguments.at(i)) : QString(" %1").arg(arguments.at(i)));
 169         }
 170
 171         return commandline;
 172 }
 173
 174