/* This file is part of Clementine.

   Clementine 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 3 of the License, or
   (at your option) any later version.

   Clementine 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 Clementine.  If not, see <http://www.gnu.org/licenses/>.
*/

//Copyright: (C) 2003 Mark Kretschmann
//           (C) 2004,2005 Max Howell, <max.howell@methylblue.com>
//License:   See COPYING

#include "enginebase.h"

#include <cmath>

const char* Engine::Base::kSettingsGroup = "Player";

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


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

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


bool
Engine::Base::load( const QUrl &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 ) );
}