audio-algo-drain/audio/algo/drain/Equalizer.h

83 lines
2.8 KiB
C++

/** @file
* @author Edouard DUPIN
* @copyright 2011, Edouard DUPIN, all right reserved
* @license APACHE v2.0 (see license file)
*/
#pragma once
#include <etk/types.h>
#include <ememory/memory.h>
#include <vector>
#include <audio/format.h>
#include <audio/algo/drain/BiQuadType.h>
namespace audio {
namespace algo {
namespace drain {
class EqualizerPrivate;
class Equalizer {
public:
/**
* @brief Constructor
*/
Equalizer();
/**
* @brief Destructor
*/
virtual ~Equalizer();
public:
/**
* @brief Reset all history of the Algo.
*/
void reset();
/**
* @brief Initialize the Algorithm
* @param[in] _sampleRate Sample rate of the stream.
* @param[in] _nbChannel Number of channel in the stream.
* @param[in] _format Input data format.
*/
virtual void init(float _sampleRate=48000, int8_t _nbChannel=2, enum audio::format _format=audio::format_float);
/**
* @brief Get list of format suported in input.
* @return list of supported format
*/
virtual std::vector<enum audio::format> getSupportedFormat();
/**
* @brief Get list of algorithm format suported. No format convertion.
* @return list of supported format
*/
virtual std::vector<enum audio::format> getNativeSupportedFormat();
/**
* @brief Main input algo process.
* @param[in,out] _output Output data.
* @param[in] _input Input data.
* @param[in] _nbChunk Number of chunk in the input buffer.
*/
virtual void process(void* _output, const void* _input, size_t _nbChunk);
public:
/**
* @brief add a biquad with his value.
*/
bool addBiquad(double _a0, double _a1, double _a2, double _b0, double _b1);
bool addBiquad(int32_t _idChannel, double _a0, double _a1, double _a2, double _b0, double _b1);
/**
* @brief add a bi-quad value and type
* @param[in] _type Type of biquad.
* @param[in] _frequencyCut Cut Frequency. [0..sampleRate/2]
* @param[in] _qualityFactor Q factor of quality (good value of 0.707 ==> permit to not ower gain) limit [0.01 .. 10]
* @param[in] _gain Gain to apply (for notch, peak, lowShelf and highShelf) limit : -30, +30
* @param[in] _sampleRate Sample rate of the signal
*/
bool addBiquad(audio::algo::drain::biQuadType _type, double _frequencyCut, double _qualityFactor, double _gain);
bool addBiquad(int32_t _idChannel, audio::algo::drain::biQuadType _type, double _frequencyCut, double _qualityFactor, double _gain);
public:
// for debug & tools only
std::vector<std::pair<float,float> > calculateTheory();
protected:
ememory::SharedPtr<EqualizerPrivate> m_private; //!< private data (abstract the type of the data flow).
};
}
}
}