File indexing completed on 2025-01-05 04:26:20

 /****************************************************************************************
  * Copyright (c) 2010 Téo Mrnjavac <teo@kde.org>                                        *
  *                                                                                      *
  * This program is free software; you can redistribute it and/or modify it under        *
  * the terms of the GNU General Public License as published by the Free Software        *
  * Foundation; either version 2 of the License, or (at your option) any later           *
  * version.                                                                             *
  *                                                                                      *
  * This program is distributed in the hope that it will be useful, but WITHOUT ANY      *
  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A      *
  * PARTICULAR PURPOSE. See the GNU General Public License for more details.             *
  *                                                                                      *
  * You should have received a copy of the GNU General Public License along with         *
  * this program.  If not, see <http://www.gnu.org/licenses/>.                           *
  ****************************************************************************************/
 
 #include "TranscodingWmaFormat.h"
 
 #include <KLocalizedString>
 
 using namespace Transcoding;
 
 WmaFormat::WmaFormat()
 {
     m_encoder = WMA2;
     m_fileExtension = QStringLiteral("wma");
     const QString description1 =
         i18n( "The bitrate is a measure of the quantity of data used to represent a "
         "second of the audio track.<br>Due to the limitations of the proprietary <b>WMA</b> "
         "format and the difficulty of reverse-engineering a proprietary encoder, the "
         "WMA encoder used by Amarok sets a <a href=http://en.wikipedia.org/wiki/"
         "Windows_Media_Audio#Windows_Media_Audio>constant bitrate (CBR)</a> setting.<br>"
         "For this reason, the bitrate measure in this slider is a pretty accurate estimate "
         "of the bitrate of the encoded track.<br>"
         "<b>136kb/s</b> is a good choice for music listening on a portable player.<br/>"
         "Anything below <b>112kb/s</b> might be unsatisfactory for music and anything above "
         "<b>182kb/s</b> is probably overkill.");
     QStringList valueLabels;
     const QByteArray cbr = "CBR %1kb/s";
     valueLabels
         << i18n( cbr, 64 )
         << i18n( cbr, 80 )
         << i18n( cbr, 96 )
         << i18n( cbr, 112 )
         << i18n( cbr, 136 )
         << i18n( cbr, 182 )
         << i18n( cbr, 275 )
         << i18n( cbr, 550 );
     m_validBitrates
         << 65
         << 75
         << 88
         << 106
         << 133
         << 180
         << 271
         << 545;
 
     m_propertyList << Property::Tradeoff( "bitrate", i18n( "Bitrate target for constant bitrate encoding" ), description1,
                                           i18n( "Smaller file" ), i18n( "Better sound quality" ),
                                           valueLabels, 4 );
 }
 
 QString
 WmaFormat::prettyName() const
 {
     return i18n( "Windows Media Audio" );
 }
 
 QString
 WmaFormat::description() const
 {
     return i18nc( "Feel free to redirect the english Wikipedia link to a local version, if "
                   "it exists.",
                   "<a href=http://en.wikipedia.org/wiki/Windows_Media_Audio>Windows Media "
                   "Audio</a> (WMA) is a proprietary codec developed by Microsoft for lossy "
                   "audio compression.<br>Recommended only for portable music players that "
                   "do not support Ogg Vorbis." );
 }
 
 QIcon
 WmaFormat::icon() const
 {
     return QIcon::fromTheme( "audio-x-generic" );  //TODO: get a *real* icon!
 }
 
 QStringList
 WmaFormat::ffmpegParameters( const Configuration &configuration ) const
 {
     QStringList parameters;
     parameters << QStringLiteral("-acodec") << QStringLiteral("wmav2");
     foreach( const Property &property, m_propertyList )
     {
         if( !configuration.property( property.name() ).isNull()
             && configuration.property( property.name() ).type() == property.variantType() )
         {
             if( property.name() == "bitrate" )
             {
                 int ffmpegBitrate = toFfmpegBitrate( configuration.property( "bitrate" ).toInt() );
                 parameters << QStringLiteral("-ab") << QString::number( ffmpegBitrate );
             }
         }
     }
     parameters << QStringLiteral("-vn"); // no video stream or album art
     return parameters;
 }
 
 int
 WmaFormat::toFfmpegBitrate( int setting ) const
 {
     return m_validBitrates[ setting ] * 1000;
 }
 
 
 bool
 WmaFormat::verifyAvailability( const QString &ffmpegOutput ) const
 {
     return ffmpegOutput.contains( QRegExp( QStringLiteral("^ .EA... wmav2 +") ) );
 }