src/Decoder_MP3.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 "Decoder_MP3.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 #include <QMutexLocker>
  37
  38 //Static
  39 QScopedPointer<QRegExp> MP3Decoder::m_regxLayer, MP3Decoder::m_regxVersion;
  40 QMutex MP3Decoder::m_regexMutex;
  41
  42 MP3Decoder::MP3Decoder(void)
  43 :
  44         m_binary(lamexp_tools_lookup("mpg123.exe"))
  45 {
  46         if (m_binary.isEmpty())
  47         {
  48                 MUTILS_THROW("Error initializing MPG123 decoder. Tool 'mpg123.exe' is not registred!");
  49         }
  50 }
  51
  52 MP3Decoder::~MP3Decoder(void)
  53 {
  54 }
  55
  56 bool MP3Decoder::decode(const QString &sourceFile, const QString &outputFile, QAtomicInt &abortFlag)
  57 {
  58         QProcess process;
  59         QStringList args;
  60
  61         args << "-v" << "--utf8" << "-w" << QDir::toNativeSeparators(outputFile);
  62         args << QDir::toNativeSeparators(sourceFile);
  63
  64         if (!startProcess(process, m_binary, args))
  65         {
  66                 return false;
  67         }
  68
  69         int prevProgress = -1;
  70         QRegExp regExp("[_=>]\\s+(\\d+)\\+(\\d+)\\s+");
  71
  72         const result_t result = awaitProcess(process, abortFlag, [this, &prevProgress, &regExp](const QString &text)
  73         {
  74                 if (regExp.lastIndexIn(text) >= 0)
  75                 {
  76                         quint32 values[2];
  77                         if (MUtils::regexp_parse_uint32(regExp, values, 2))
  78                         {
  79                                 const quint32 total = values[0] + values[1];
  80                                 if ((total >= 512U) && (values[0] >= 256U))
  81                                 {
  82                                         const int newProgress = qRound((static_cast<double>(values[0]) / static_cast<double>(total)) * 100.0);
  83                                         if (newProgress > prevProgress)
  84                                         {
  85                                                 emit statusUpdated(newProgress);
  86                                                 prevProgress = NEXT_PROGRESS(newProgress);
  87                                         }
  88                                 }
  89                         }
  90                         return true;
  91                 }
  92                 return false;
  93         });
  94
  95         return (result == RESULT_SUCCESS);
  96 }
  97
  98 bool MP3Decoder::isFormatSupported(const QString &containerType, const QString &containerProfile, const QString &formatType, const QString &formatProfile, const QString &formatVersion)
  99 {
 100         static const QLatin1String mpegAudio("MPEG Audio"), waveAudio("Wave");
 101         if((containerType.compare(mpegAudio, Qt::CaseInsensitive) == 0) || (containerType.compare(waveAudio, Qt::CaseInsensitive) == 0))
 102         {
 103                 if(formatType.compare(mpegAudio, Qt::CaseInsensitive) == 0)
 104                 {
 105                         QMutexLocker lock(&m_regexMutex);
 106                         if (m_regxLayer.isNull())
 107                         {
 108                                 m_regxLayer.reset(new QRegExp(L1S("^Layer\\s+(1|2|3)\\b"), Qt::CaseInsensitive));
 109                         }
 110                         if (m_regxLayer->indexIn(formatProfile) >= 0)
 111                         {
 112                                 if (m_regxVersion.isNull())
 113                                 {
 114                                         m_regxVersion.reset(new QRegExp(L1S("^(Version\\s+)?(1|2|2\\.5)\\b"), Qt::CaseInsensitive));
 115                                 }
 116                                 return (m_regxVersion->indexIn(formatVersion) >= 0);
 117                         }
 118                 }
 119         }
 120
 121         return false;
 122 }
 123
 124 const AbstractDecoder::supportedType_t *MP3Decoder::supportedTypes(void)
 125 {
 126         static const char *exts[][3] =
 127         {
 128                 { "mp3", "mpa", NULL },
 129                 { "mp2", "mpa", NULL },
 130                 { "mp1", "mpa", NULL }
 131         };
 132
 133         static const supportedType_t s_supportedTypes[] =
 134         {
 135                 { "MPEG Audio Layer III", exts[0] },
 136                 { "MPEG Audio Layer II",  exts[1] },
 137                 { "MPEG Audio Layer I",   exts[2] },
 138                 { NULL, NULL }
 139         };
 140
 141         return s_supportedTypes;
 142 }