src/Filter_Resample.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // LameXP - Audio Encoder Front-End
   3 // Copyright (C) 2004-2011 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_Resample.h"
  23
  24 #include "Global.h"
  25
  26 #include <QDir>
  27 #include <QProcess>
  28 #include <QRegExp>
  29
  30 ResampleFilter::ResampleFilter(int samplingRate)
  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         m_samplingRate = min(192000, max(8000, samplingRate));
  40 }
  41
  42 ResampleFilter::~ResampleFilter(void)
  43 {
  44 }
  45
  46 bool ResampleFilter::apply(const QString &sourceFile, const QString &outputFile, volatile bool *abortFlag)
  47 {
  48         QProcess process;
  49         QStringList args;
  50
  51         process.setWorkingDirectory(lamexp_temp_folder());
  52
  53         args << "-V3";
  54         args << "--guard" << "--temp" << ".";
  55         args << QDir::toNativeSeparators(sourceFile);
  56         args << QDir::toNativeSeparators(outputFile);
  57         args << "rate";
  58         args << "-h" << QString::number(m_samplingRate);
  59
  60         if(!startProcess(process, m_binary, args))
  61         {
  62                 return false;
  63         }
  64
  65         bool bTimeout = false;
  66         bool bAborted = false;
  67
  68         while(process.state() != QProcess::NotRunning)
  69         {
  70                 if(*abortFlag)
  71                 {
  72                         process.kill();
  73                         bAborted = true;
  74                         emit messageLogged("\nABORTED BY USER !!!");
  75                         break;
  76                 }
  77                 process.waitForReadyRead();
  78                 if(!process.bytesAvailable() && process.state() == QProcess::Running)
  79                 {
  80                         process.kill();
  81                         qWarning("SoX process timed out <-- killing!");
  82                         bTimeout = true;
  83                         break;
  84                 }
  85                 while(process.bytesAvailable() > 0)
  86                 {
  87                         QByteArray line = process.readLine();
  88                         QString text = QString::fromUtf8(line.constData()).simplified();
  89                         if(!text.isEmpty())
  90                         {
  91                                 emit messageLogged(text);
  92                         }
  93                 }
  94         }
  95
  96         process.waitForFinished();
  97         if(process.state() != QProcess::NotRunning)
  98         {
  99                 process.kill();
 100                 process.waitForFinished(-1);
 101         }
 102
 103         emit statusUpdated(100);
 104         emit messageLogged(QString().sprintf("\nExited with code: 0x%04X", process.exitCode()));
 105
 106         if(bTimeout || bAborted || process.exitStatus() != QProcess::NormalExit || QFileInfo(outputFile).size() == 0)
 107         {
 108                 return false;
 109         }
 110
 111         return true;
 112 }