src/Filter_Resample.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // LameXP - Audio Encoder Front-End
   3 // Copyright (C) 2004-2015 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_Resample.h"
  24
  25 //Internal
  26 #include "Global.h"
  27 #include "Model_AudioFile.h"
  28
  29 //MUtils
  30 #include <MUtils/Exception.h>
  31
  32 //Qt
  33 #include <QDir>
  34 #include <QProcess>
  35 #include <QRegExp>
  36
  37 static __inline int multipleOf(int value, int base)
  38 {
  39         return qRound(static_cast<double>(value) / static_cast<double>(base)) * base;
  40 }
  41
  42 ResampleFilter::ResampleFilter(int samplingRate, int bitDepth)
  43 :
  44         m_binary(lamexp_tools_lookup("sox.exe"))
  45 {
  46         if(m_binary.isEmpty())
  47         {
  48                 MUTILS_THROW("Error initializing SoX filter. Tool 'sox.exe' is not registred!");
  49         }
  50
  51         m_samplingRate = (samplingRate > 0) ? qBound(8000, samplingRate, 192000) : 0;
  52         m_bitDepth = (bitDepth > 0) ? qBound(8, multipleOf(bitDepth, 8), 32) : 0;
  53
  54         if((m_samplingRate == 0) && (m_bitDepth == 0))
  55         {
  56                 qWarning("ResampleFilter: Nothing to do, filter will be NOP!");
  57         }
  58 }
  59
  60 ResampleFilter::~ResampleFilter(void)
  61 {
  62 }
  63
  64 bool ResampleFilter::apply(const QString &sourceFile, const QString &outputFile, AudioFileModel_TechInfo *formatInfo, volatile bool *abortFlag)
  65 {
  66         QProcess process;
  67         QStringList args;
  68
  69         if((m_samplingRate == formatInfo->audioSamplerate()) && (m_bitDepth == formatInfo->audioBitdepth()))
  70         {
  71                 messageLogged("Skipping resample filter!");
  72                 qDebug("Resampling filter target samplerate/bitdepth is equals to the format of the input file, skipping!");
  73                 return true;
  74         }
  75
  76         process.setWorkingDirectory(QFileInfo(outputFile).canonicalPath());
  77
  78         args << "-V3" << "-S";
  79         args << "--guard" << "--temp" << ".";
  80         args << QDir::toNativeSeparators(sourceFile);
  81
  82         if(m_bitDepth)
  83         {
  84                 args << "-b" << QString::number(m_bitDepth);
  85         }
  86
  87         args << QDir::toNativeSeparators(outputFile);
  88
  89         if(m_samplingRate)
  90         {
  91                 args << "rate";
  92                 args << ((m_bitDepth > 16) ? "-v" : "-h");                      //if resampling at/to > 16 bit depth (i.e. most commonly 24-bit), use VHQ (-v), otherwise, use HQ (-h)
  93                 args << ((m_samplingRate > 40000) ? "-L" : "-I");       //if resampling to < 40k, use intermediate phase (-I), otherwise use linear phase (-L)
  94                 args << QString::number(m_samplingRate);
  95         }
  96
  97         if((m_bitDepth || m_samplingRate) && (m_bitDepth <= 16))
  98         {
  99                 args << "dither" << "-s";                                       //if you're mastering to 16-bit, you also need to add 'dither' (and in most cases noise-shaping) after the rate
 100         }
 101
 102         if(!startProcess(process, m_binary, args))
 103         {
 104                 return false;
 105         }
 106
 107         bool bTimeout = false;
 108         bool bAborted = false;
 109
 110         QRegExp regExp("In:(\\d+)(\\.\\d+)*%");
 111
 112         while(process.state() != QProcess::NotRunning)
 113         {
 114                 if(*abortFlag)
 115                 {
 116                         process.kill();
 117                         bAborted = true;
 118                         emit messageLogged("\nABORTED BY USER !!!");
 119                         break;
 120                 }
 121                 process.waitForReadyRead(m_processTimeoutInterval);
 122                 if(!process.bytesAvailable() && process.state() == QProcess::Running)
 123                 {
 124                         process.kill();
 125                         qWarning("SoX process timed out <-- killing!");
 126                         emit messageLogged("\nPROCESS TIMEOUT !!!");
 127                         bTimeout = true;
 128                         break;
 129                 }
 130                 while(process.bytesAvailable() > 0)
 131                 {
 132                         QByteArray line = process.readLine();
 133                         QString text = QString::fromUtf8(line.constData()).simplified();
 134                         if(regExp.lastIndexIn(text) >= 0)
 135                         {
 136                                 bool ok = false;
 137                                 int progress = regExp.cap(1).toInt(&ok);
 138                                 if(ok) emit statusUpdated(progress);
 139                         }
 140                         else if(!text.isEmpty())
 141                         {
 142                                 emit messageLogged(text);
 143                         }
 144                 }
 145         }
 146
 147         process.waitForFinished();
 148         if(process.state() != QProcess::NotRunning)
 149         {
 150                 process.kill();
 151                 process.waitForFinished(-1);
 152         }
 153
 154         emit statusUpdated(100);
 155         emit messageLogged(QString().sprintf("\nExited with code: 0x%04X", process.exitCode()));
 156
 157         if(bTimeout || bAborted || process.exitCode() != EXIT_SUCCESS || QFileInfo(outputFile).size() == 0)
 158         {
 159                 return false;
 160         }
 161
 162         if(m_samplingRate) formatInfo->setAudioSamplerate(m_samplingRate);
 163         if(m_bitDepth) formatInfo->setAudioBitdepth(m_bitDepth);
 164
 165         return true;
 166 }