/usr/include/qmmp/eqsettings.h is in libqmmp-dev 0.7.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2010-2012 by Ilya Kotov *
* forkotov02@hotmail.ru *
* *
* 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 EQSETTINGS_H
#define EQSETTINGS_H
/*! @brief The EqSettings class helps to work with equalizer settings.
* @author Ilya Kotov <forkotov02@hotmail.ru>
*/
class EqSettings
{
public:
/*!
* Constructs an empty equalizer settings (0 dB, disabled)
* @param bands - Number of bands (supported: 10, 15, 25, 31)
*/
EqSettings(int bands = EQ_BANDS_10);
/*!
* Returns \b true if equalizer os enabled, otherwise returns \b false.
*/
bool isEnabled() const;
/*!
* Returns gain of the channel number \b chan.
*/
double gain(int chan) const;
/*!
* Returns equalizer preamp.
*/
double preamp() const;
/*!
* Returns number of bands
*/
int bands() const;
/*!
* Enables equalizer if \p enabled is \b true or disables it if \p enabled is \b false.
*/
void setEnabled(bool enabled = true);
/*!
* Sets gain of the equalizer channel.
* @param band Number of equalizer band.
* @param gain Channel gain (-20.0..20.0 dB)
*/
void setGain(int band, double gain);
/*!
* Sets equalizer preamp to \b preamp.
*/
void setPreamp(double preamp);
/*!
* Assigns equalizer settings \b s to this settings.
*/
void operator=(const EqSettings &s);
/*!
* Returns \b true if equalizer settins \b s is equal to this settings; otherwise returns false.
*/
bool operator==(const EqSettings &s) const;
/*!
* Returns \b true if equalizer settins \b s is not equal to this settings; otherwise returns false.
*/
bool operator!=(const EqSettings &s) const;
/*!
* Equalizer bands number
*/
enum BANDS
{
EQ_BANDS_10 = 10, /*!< 10 bands */
EQ_BANDS_15 = 15, /*!< 15 bands */
EQ_BANDS_25 = 25, /*!< 25 bands */
EQ_BANDS_31 = 31 /*!< 31 bands */
};
private:
double m_gains[31];
double m_preamp;
bool m_is_enabled;
int m_bands;
};
#endif // EQSETTINGS_H
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