src/Filter_Resample.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // LameXP - Audio Encoder Front-End
   3 // Copyright (C) 2004-2012 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 #include "Model_AudioFile.h"
  26
  27 #include <QDir>
  28 #include <QProcess>
  29 #include <QRegExp>
  30
  31 static __inline int multipleOf(int value, int base)
  32 {
  33         return qRound(static_cast<double>(value) / static_cast<double>(base)) * base;
  34 }
  35
  36 ResampleFilter::ResampleFilter(int samplingRate, int bitDepth)
  37 :
  38         m_binary(lamexp_lookup_tool("sox.exe"))
  39 {
  40         if(m_binary.isEmpty())
  41         {
  42                 throw "Error initializing SoX filter. Tool 'sox.exe' is not registred!";
  43         }
  44
  45         m_samplingRate = (samplingRate > 0) ? qBound(8000, samplingRate, 192000) : 0;
  46         m_bitDepth = (bitDepth > 0) ? qBound(8, multipleOf(bitDepth, 8), 32) : 0;
  47
  48         if((m_samplingRate == 0) && (m_bitDepth == 0))
  49         {
  50                 qWarning("ResampleFilter: Nothing to do, filter will be NOP!");
  51         }
  52 }
  53
  54 ResampleFilter::~ResampleFilter(void)
  55 {
  56 }
  57
  58 bool ResampleFilter::apply(const QString &sourceFile, const QString &outputFile, AudioFileModel *formatInfo, volatile bool *abortFlag)
  59 {
  60         QProcess process;
  61         QStringList args;
  62
  63         if((m_samplingRate == formatInfo->formatAudioSamplerate()) && (m_bitDepth == formatInfo->formatAudioBitdepth()))
  64         {
  65                 messageLogged("Skipping resample filter!");
  66                 qDebug("Resampling filter target samplerate/bitdepth is equals to the format of the input file, skipping!");
  67                 return true;
  68         }
  69
  70         process.setWorkingDirectory(QFileInfo(outputFile).canonicalPath());
  71
  72         args << "-V3" << "-S";
  73         args << "--guard" << "--temp" << ".";
  74         args << QDir::toNativeSeparators(sourceFile);
  75
  76         if(m_bitDepth)
  77         {
  78                 args << "-b" << QString::number(m_bitDepth);
  79         }
  80
  81         args << QDir::toNativeSeparators(outputFile);
  82
  83         if(m_samplingRate)
  84         {
  85                 args << "rate";
  86                 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)
  87                 args << ((m_samplingRate > 40000) ? "-L" : "-I");       //if resampling to < 40k, use intermediate phase (-I), otherwise use linear phase (-L)
  88                 args << QString::number(m_samplingRate);
  89         }
  90
  91         if((m_bitDepth || m_samplingRate) && (m_bitDepth <= 16))
  92         {
  93                 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
  94         }
  95
  96         if(!startProcess(process, m_binary, args))
  97         {
  98                 return false;
  99         }
 100
 101         bool bTimeout = false;
 102         bool bAborted = false;
 103
 104         QRegExp regExp("In:(\\d+)(\\.\\d+)*%");
 105
 106         while(process.state() != QProcess::NotRunning)
 107         {
 108                 if(*abortFlag)
 109                 {
 110                         process.kill();
 111                         bAborted = true;
 112                         emit messageLogged("\nABORTED BY USER !!!");
 113                         break;
 114                 }
 115                 process.waitForReadyRead(m_processTimeoutInterval);
 116                 if(!process.bytesAvailable() && process.state() == QProcess::Running)
 117                 {
 118                         process.kill();
 119                         qWarning("SoX process timed out <-- killing!");
 120                         emit messageLogged("\nPROCESS TIMEOUT !!!");
 121                         bTimeout = true;
 122                         break;
 123                 }
 124                 while(process.bytesAvailable() > 0)
 125                 {
 126                         QByteArray line = process.readLine();
 127                         QString text = QString::fromUtf8(line.constData()).simplified();
 128                         if(regExp.lastIndexIn(text) >= 0)
 129                         {
 130                                 bool ok = false;
 131                                 int progress = regExp.cap(1).toInt(&ok);
 132                                 if(ok) emit statusUpdated(progress);
 133                         }
 134                         else if(!text.isEmpty())
 135                         {
 136                                 emit messageLogged(text);
 137                         }
 138                 }
 139         }
 140
 141         process.waitForFinished();
 142         if(process.state() != QProcess::NotRunning)
 143         {
 144                 process.kill();
 145                 process.waitForFinished(-1);
 146         }
 147
 148         emit statusUpdated(100);
 149         emit messageLogged(QString().sprintf("\nExited with code: 0x%04X", process.exitCode()));
 150
 151         if(bTimeout || bAborted || process.exitCode() != EXIT_SUCCESS || QFileInfo(outputFile).size() == 0)
 152         {
 153                 return false;
 154         }
 155
 156         if(m_samplingRate) formatInfo->setFormatAudioSamplerate(m_samplingRate);
 157         if(m_bitDepth) formatInfo->setFormatAudioBitdepth(m_bitDepth);
 158
 159         return true;
 160 }