equalizer.hpp

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/*****************************************************************************
 * equalizer.hpp
 *****************************************************************************
 * Copyright (C) 2003 the VideoLAN team
 * $Id: ae90966a0be87f9fb8b1930a856beb318a9ae04f $
 *
 * Authors: Cyril Deguet     <asmax@via.ecp.fr>
 *
 * 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, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

#ifndef EQUALIZER_HPP
#define EQUALIZER_HPP

#include "../utils/var_percent.hpp"
#include <string>


/// Variable for graphical equalizer
class EqualizerBands: public SkinObject, public Observer<VarPercent>
{
public:
    /// Number of bands
    static const int kNbBands = 10;

    EqualizerBands( intf_thread_t *pIntf );
    virtual ~EqualizerBands();

    /// Set the equalizer bands from a configuration string,
    /// e.g. "1 5.2 -3.6 0 0 2.5 0 0 0 0"
    void set( string bands );

    /// Return the variable for a specific band
    VariablePtr getBand( int band );

private:
    /// Array of equalizer bands
    VariablePtr m_cBands[kNbBands];
    /// Flag set when an update is in progress
    bool m_isUpdating;

    /// Callback for band updates
    virtual void onUpdate( Subject<VarPercent> &rBand , void *);
};


/// Variable for equalizer preamp
class EqualizerPreamp: public VarPercent
{
public:
    EqualizerPreamp( intf_thread_t *pIntf );
    virtual ~EqualizerPreamp() { }

    virtual void set( float percentage, bool updateVLC );

    void set( float percentage ) { set( percentage, true ); }
};


#endif