83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
/** @file
|
|
* @author Edouard DUPIN
|
|
* @copyright 2011, Edouard DUPIN, all right reserved
|
|
* @license APACHE v2.0 (see license file)
|
|
*/
|
|
|
|
#ifndef __DRAIN_ALGO_EQUALIZER_H__
|
|
#define __DRAIN_ALGO_EQUALIZER_H__
|
|
|
|
#include <drain/Algo.h>
|
|
#include <etk/memory.h>
|
|
|
|
namespace drain {
|
|
enum filterType {
|
|
filterType_none, //!< no filter
|
|
filterType_LPF, //!< low pass filter
|
|
filterType_HPF, //!< High pass filter
|
|
filterType_BPF, //!< band pass filter
|
|
filterType_NOTCH, //!< Notch Filter
|
|
filterType_APF, //!< All pass Filter
|
|
filterType_PeakingEQ, //!< Peaking band EQ filter
|
|
filterType_LSH, //!< Low shelf filter
|
|
filterType_HSH, //!< High shelf filter
|
|
filterType_EQU //!< Equalizer
|
|
};
|
|
class BGHistory {
|
|
public:
|
|
BGHistory() {
|
|
m_x[0] = 0;
|
|
m_y[1] = 0;
|
|
m_x[0] = 0;
|
|
m_y[1] = 0;
|
|
}
|
|
float m_x[2]; //!< X history
|
|
float m_y[2]; //!< Y histiry
|
|
};
|
|
class Equalizer : public Algo {
|
|
protected:
|
|
/**
|
|
* @brief Constructor
|
|
*/
|
|
Equalizer();
|
|
void init();
|
|
public:
|
|
static std11::shared_ptr<Equalizer> create();
|
|
/**
|
|
* @brief Destructor
|
|
*/
|
|
virtual ~Equalizer();
|
|
protected:
|
|
virtual void configurationChange();
|
|
public:
|
|
virtual bool process(std11::chrono::system_clock::time_point& _time,
|
|
void* _input,
|
|
size_t _inputNbChunk,
|
|
void*& _output,
|
|
size_t& _outputNbChunk);
|
|
virtual bool setParameter(const std::string& _parameter, const std::string& _value);
|
|
virtual std::string getParameter(const std::string& _parameter) const;
|
|
virtual std::string getParameterProperty(const std::string& _parameter) const;
|
|
|
|
protected:
|
|
float processFloat(float _sample, drain::BGHistory& _history);
|
|
//-----------------------------------------
|
|
// START parameters:
|
|
enum filterType m_type; //!< current filter type.
|
|
float m_gain; //!< Gain to apply in dB
|
|
float m_frequency; //!< Frequency to apply filter
|
|
float m_bandWidth; //!< Band With to apply filter
|
|
// END parameters:
|
|
//-----------------------------------------
|
|
float m_a[2]; //!< A bi-Quad coef
|
|
float m_b[3]; //!< B bi-Quad coef
|
|
std::vector<BGHistory> m_history;
|
|
/**
|
|
* @brief Configure the current biquad.
|
|
*/
|
|
bool configureBiQuad();
|
|
};
|
|
};
|
|
|
|
#endif
|