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(QFileInfo(outputFile).canonicalPath());
  52
  53         args << "-V3" << "-S";
  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         QRegExp regExp("In:(\\d+)(\\.\\d+)*%");
  69
  70         while(process.state() != QProcess::NotRunning)
  71         {
  72                 if(*abortFlag)
  73                 {
  74                         process.kill();
  75                         bAborted = true;
  76                         emit messageLogged("\nABORTED BY USER !!!");
  77                         break;
  78                 }
  79                 process.waitForReadyRead();
  80                 if(!process.bytesAvailable() && process.state() == QProcess::Running)
  81                 {
  82                         process.kill();
  83                         qWarning("SoX process timed out <-- killing!");
  84                         emit messageLogged("\nPROCESS TIMEOUT !!!");
  85                         bTimeout = true;
  86                         break;
  87                 }
  88                 while(process.bytesAvailable() > 0)
  89                 {
  90                         QByteArray line = process.readLine();
  91                         QString text = QString::fromUtf8(line.constData()).simplified();
  92                         if(regExp.lastIndexIn(text) >= 0)
  93                         {
  94                                 bool ok = false;
  95                                 int progress = regExp.cap(1).toInt(&ok);
  96                                 if(ok) emit statusUpdated(progress);
  97                         }
  98                         else if(!text.isEmpty())
  99                         {
 100                                 emit messageLogged(text);
 101                         }
 102                 }
 103         }
 104
 105         process.waitForFinished();
 106         if(process.state() != QProcess::NotRunning)
 107         {
 108                 process.kill();
 109                 process.waitForFinished(-1);
 110         }
 111
 112         emit statusUpdated(100);
 113         emit messageLogged(QString().sprintf("\nExited with code: 0x%04X", process.exitCode()));
 114
 115         if(bTimeout || bAborted || process.exitStatus() != QProcess::NormalExit || QFileInfo(outputFile).size() == 0)
 116         {
 117                 return false;
 118         }
 119
 120         return true;
 121 }