src/Filter_Downmix.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // LameXP - Audio Encoder Front-End
   3 // Copyright (C) 2004-2010 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 "Filter_Downmix.h"
  23
  24 #include "Global.h"
  25
  26 #include <QDir>
  27 #include <QProcess>
  28 #include <QRegExp>
  29
  30 DownmixFilter::DownmixFilter(void)
  31 :
  32         m_binary(lamexp_lookup_tool("sox.exe"))
  33 {
  34         if(m_binary.isEmpty())
  35         {
  36                 throw "Error initializing SoX filter. Tool 'sox.exe' is not registred!";
  37         }
  38 }
  39
  40 DownmixFilter::~DownmixFilter(void)
  41 {
  42 }
  43
  44 bool DownmixFilter::apply(const QString &sourceFile, const QString &outputFile, volatile bool *abortFlag)
  45 {
  46         QProcess process;
  47         QStringList args;
  48
  49         args << "-V3";
  50         args << QDir::toNativeSeparators(sourceFile);
  51         args << "-c2";
  52         args << QDir::toNativeSeparators(outputFile);
  53
  54         if(!startProcess(process, m_binary, args))
  55         {
  56                 return false;
  57         }
  58
  59         bool bTimeout = false;
  60         bool bAborted = false;
  61
  62         while(process.state() != QProcess::NotRunning)
  63         {
  64                 if(*abortFlag)
  65                 {
  66                         process.kill();
  67                         bAborted = true;
  68                         emit messageLogged("\nABORTED BY USER !!!");
  69                         break;
  70                 }
  71                 process.waitForReadyRead();
  72                 if(!process.bytesAvailable() && process.state() == QProcess::Running)
  73                 {
  74                         process.kill();
  75                         qWarning("SoX process timed out <-- killing!");
  76                         bTimeout = true;
  77                         break;
  78                 }
  79                 while(process.bytesAvailable() > 0)
  80                 {
  81                         QByteArray line = process.readLine();
  82                         QString text = QString::fromUtf8(line.constData()).simplified();
  83                         if(!text.isEmpty())
  84                         {
  85                                 emit messageLogged(text);
  86                         }
  87                 }
  88         }
  89
  90         process.waitForFinished();
  91         if(process.state() != QProcess::NotRunning)
  92         {
  93                 process.kill();
  94                 process.waitForFinished(-1);
  95         }
  96
  97         emit statusUpdated(100);
  98         emit messageLogged(QString().sprintf("\nExited with code: 0x%04X", process.exitCode()));
  99
 100         if(bTimeout || bAborted || process.exitStatus() != QProcess::NormalExit || QFileInfo(outputFile).size() == 0)
 101         {
 102                 return false;
 103         }
 104
 105         return true;
 106 }