src/Filter_Normalize.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // LameXP - Audio Encoder Front-End
   3 // Copyright (C) 2004-2018 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 "Filter_Normalize.h"
  24
  25 //Internal
  26 #include "Global.h"
  27
  28 //MUtils
  29 #include <MUtils/Global.h>
  30 #include <MUtils/Exception.h>
  31
  32 //Qt
  33 #include <QDir>
  34 #include <QProcess>
  35 #include <QRegExp>
  36
  37 static double dbToLinear(const double &value)
  38 {
  39         return pow(10.0, value / 20.0);
  40 }
  41
  42 NormalizeFilter::NormalizeFilter(const int &peakVolume, const bool &dnyAudNorm, const bool &channelsCoupled, const int &filterSize)
  43 :
  44         m_binary(lamexp_tools_lookup("sox.exe")),
  45         m_useDynAudNorm(dnyAudNorm),
  46         m_peakVolume(qMin(-50, qMax(-3200, peakVolume))),
  47         m_channelsCoupled(channelsCoupled),
  48         m_filterLength(qBound(3, filterSize + (1 - (filterSize % 2)), 301))
  49 {
  50         if(m_binary.isEmpty())
  51         {
  52                 MUTILS_THROW("Error initializing SoX filter. Tool 'sox.exe' is not registred!");
  53         }
  54 }
  55
  56 NormalizeFilter::~NormalizeFilter(void)
  57 {
  58 }
  59
  60 AbstractFilter::FilterResult NormalizeFilter::apply(const QString &sourceFile, const QString &outputFile, AudioFileModel_TechInfo *const formatInfo, QAtomicInt &abortFlag)
  61 {
  62         QProcess process;
  63         QStringList args;
  64
  65         args << "-V3" << "-S";
  66         args << "--temp" << ".";
  67         args << QDir::toNativeSeparators(sourceFile);
  68         args << QDir::toNativeSeparators(outputFile);
  69
  70         if(!m_useDynAudNorm)
  71         {
  72                 args << "gain";
  73                 args << (m_channelsCoupled ? "-n" : "-nb");
  74                 args << QString().sprintf("%.2f", static_cast<double>(m_peakVolume) / 100.0);
  75         }
  76         else
  77         {
  78                 args << "dynaudnorm";
  79                 args << "-p" << QString().sprintf("%.2f", qBound(0.1, dbToLinear(static_cast<double>(m_peakVolume) / 100.0), 1.0));
  80                 args << "-g" << QString().sprintf("%d", m_filterLength);
  81                 if(!m_channelsCoupled)
  82                 {
  83                         args << "-n";
  84                 }
  85         }
  86
  87         if(!startProcess(process, m_binary, args, QFileInfo(outputFile).canonicalPath()))
  88         {
  89                 return AbstractFilter::FILTER_FAILURE;
  90         }
  91
  92         int prevProgress = -1;
  93         QRegExp regExp("In:(\\d+)(\\.\\d+)*%");
  94
  95         const result_t result = awaitProcess(process, abortFlag, [this, &prevProgress, &regExp](const QString &text)
  96         {
  97                 if (regExp.lastIndexIn(text) >= 0)
  98                 {
  99                         qint32 newProgress;
 100                         if (MUtils::regexp_parse_int32(regExp, newProgress))
 101                         {
 102                                 if (newProgress > prevProgress)
 103                                 {
 104                                         emit statusUpdated(newProgress);
 105                                         prevProgress = NEXT_PROGRESS(newProgress);
 106                                 }
 107                         }
 108                         return true;
 109                 }
 110                 return false;
 111         });
 112
 113         if (result != RESULT_SUCCESS)
 114         {
 115                 return AbstractFilter::FILTER_FAILURE;
 116         }
 117
 118         return AbstractFilter::FILTER_SUCCESS;
 119 }