enginebase.cpp

来自「Amarok是一款在LINUX或其他类UNIX操作系统中运行的音频播放器软件。 」· C++ 代码 · 共 54 行

//Copyright: (C) 2003 Mark Kretschmann
//           (C) 2004,2005 Max Howell, <[e-mail]>
//License:   See COPYING

#include "enginebase.h"

#include <cmath>


Engine::Base::Base()
        : Amarok::Plugin()
        , m_xfadeLength( 0 )
        , m_xfadeNextTrack( false )
        , m_volume( 50 )
        , m_scope( SCOPESIZE )
        , m_isStream( false )
{}


Engine::Base::~Base()
{
}

//////////////////////////////////////////////////////////////////////


bool
Engine::Base::load( const KURL &url, bool stream )
{
    m_url = url;
    m_isStream = stream;

    return true;
}


void Engine::Base::setVolume( uint value )
{
    m_volume = value;

    setVolumeSW( makeVolumeLogarithmic( value ) );
}


uint
Engine::Base::makeVolumeLogarithmic( uint volume ) // static
{
    // We're using a logarithmic function to make the volume ramp more natural.
    return static_cast<uint>( 100 - 100.0 * std::log10( ( 100 - volume ) * 0.09 + 1.0 ) );
}


#include "enginebase.moc"