src/Decoder_MP3.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 "Decoder_MP3.h"
  23
  24 #include "Global.h"
  25
  26 #include <QDir>
  27 #include <QProcess>
  28 #include <QRegExp>
  29
  30 MP3Decoder::MP3Decoder(void)
  31 :
  32         m_binary(lamexp_lookup_tool("mpg123.exe"))
  33 {
  34         if(m_binary.isEmpty())
  35         {
  36                 throw "Error initializing MPG123 decoder. Tool 'mpg123.exe' is not registred!";
  37         }
  38 }
  39
  40 MP3Decoder::~MP3Decoder(void)
  41 {
  42 }
  43
  44 bool MP3Decoder::decode(const QString &sourceFile, const QString &outputFile, volatile bool *abortFlag)
  45 {
  46         QProcess process;
  47         QStringList args;
  48
  49         args << "-v" << "--utf8" << "-w" << QDir::toNativeSeparators(outputFile);
  50         args << QDir::toNativeSeparators(sourceFile);
  51
  52         if(!startProcess(process, m_binary, args))
  53         {
  54                 return false;
  55         }
  56
  57         bool bTimeout = false;
  58         bool bAborted = false;
  59         int prevProgress = -1;
  60
  61         QRegExp regExp("\\s+Time:\\s+(\\d+):(\\d+)\\.(\\d+)\\s+\\[(\\d+):(\\d+)\\.(\\d+)\\],");
  62
  63         while(process.state() != QProcess::NotRunning)
  64         {
  65                 if(*abortFlag)
  66                 {
  67                         process.kill();
  68                         bAborted = true;
  69                         emit messageLogged("\nABORTED BY USER !!!");
  70                         break;
  71                 }
  72                 process.waitForReadyRead(m_processTimeoutInterval);
  73                 if(!process.bytesAvailable() && process.state() == QProcess::Running)
  74                 {
  75                         process.kill();
  76                         qWarning("mpg123 process timed out <-- killing!");
  77                         emit messageLogged("\nPROCESS TIMEOUT !!!");
  78                         bTimeout = true;
  79                         break;
  80                 }
  81                 while(process.bytesAvailable() > 0)
  82                 {
  83                         QByteArray line = process.readLine();
  84                         QString text = QString::fromUtf8(line.constData()).simplified();
  85                         if(regExp.lastIndexIn(text) >= 0)
  86                         {
  87                                 int values[6];
  88                                 for(int i = 0; i < 6; i++)
  89                                 {
  90                                         bool ok = false;
  91                                         int temp = regExp.cap(i+1).toInt(&ok);
  92                                         values[i] = (ok ? temp : 0);
  93                                 }
  94                                 int timeDone = (60 * values[0]) + values[1];
  95                                 int timeLeft = (60 * values[3]) + values[4];
  96                                 if(timeDone > 0 || timeLeft > 0)
  97                                 {
  98                                         int newProgress = qRound((static_cast<double>(timeDone) / static_cast<double>(timeDone + timeLeft)) * 100.0);
  99                                         if(newProgress > prevProgress)
 100                                         {
 101                                                 emit statusUpdated(newProgress);
 102                                                 prevProgress = qMin(newProgress + 2, 99);
 103                                         }
 104                                 }
 105                         }
 106                         else if(!text.isEmpty())
 107                         {
 108                                 emit messageLogged(text);
 109                         }
 110                 }
 111         }
 112
 113         process.waitForFinished();
 114         if(process.state() != QProcess::NotRunning)
 115         {
 116                 process.kill();
 117                 process.waitForFinished(-1);
 118         }
 119
 120         emit statusUpdated(100);
 121         emit messageLogged(QString().sprintf("\nExited with code: 0x%04X", process.exitCode()));
 122
 123         if(bTimeout || bAborted || process.exitCode() != EXIT_SUCCESS)
 124         {
 125                 return false;
 126         }
 127
 128         return true;
 129 }
 130
 131 bool MP3Decoder::isFormatSupported(const QString &containerType, const QString &containerProfile, const QString &formatType, const QString &formatProfile, const QString &formatVersion)
 132 {
 133         if(containerType.compare("MPEG Audio", Qt::CaseInsensitive) == 0 || containerType.compare("Wave", Qt::CaseInsensitive) == 0)
 134         {
 135                 if(formatType.compare("MPEG Audio", Qt::CaseInsensitive) == 0)
 136                 {
 137                         if(formatProfile.compare("Layer 3", Qt::CaseInsensitive) == 0 || formatProfile.compare("Layer 2", Qt::CaseInsensitive) == 0)
 138                         {
 139                                 if(formatVersion.compare("Version 1", Qt::CaseInsensitive) == 0 || formatVersion.compare("Version 2", Qt::CaseInsensitive) == 0)
 140                                 {
 141                                         return true;
 142                                 }
 143                         }
 144                 }
 145         }
 146
 147         return false;
 148 }
 149
 150 QStringList MP3Decoder::supportedTypes(void)
 151 {
 152         return QStringList() << "MPEG Audio Layer III (*.mp3 *.mpa)" << "MPEG Audio Layer II (*.mp2 *.mpa)" << "MPEG Audio Layer I ( *.mp1 *.mpa)";
 153 }
 154