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//////////////////////////////////////////////////////////////////////
// agc_impl.h: interface for the CAgc class.
//
// This class implements an automatic gain function.
//
// History:
// 2010-09-15 Initial creation MSW
// 2011-03-27 Initial release
// 2011-09-24 Adapted for gqrx
//////////////////////////////////////////////////////////////////////
#ifndef AGC_IMPL_H
#define AGC_IMPL_H
//#include "dsp/datatypes.h"
//#include <QMutex>
#define MAX_DELAY_BUF 2048
typedef struct _dCplx
{
double re;
double im;
} tDComplex;
#define TYPECPX tDComplex
class CAgc
{
public:
CAgc();
virtual ~CAgc();
void SetParameters(bool AgcOn, bool UseHang, int Threshold, int ManualGain, int Slope, int Decay, double SampleRate);
void ProcessData(int Length, TYPECPX* pInData, TYPECPX* pOutData);
void ProcessData(int Length, double* pInData, double* pOutData);
private:
bool m_AgcOn; //internal copy of AGC settings parameters
bool m_UseHang;
int m_Threshold;
int m_ManualGain;
int m_Slope;
int m_Decay;
double m_SampleRate;
double m_SlopeFactor;
double m_ManualAgcGain;
double m_DecayAve;
double m_AttackAve;
double m_AttackRiseAlpha;
double m_AttackFallAlpha;
double m_DecayRiseAlpha;
double m_DecayFallAlpha;
double m_FixedGain;
double m_Knee;
double m_GainSlope;
double m_Peak;
int m_SigDelayPtr;
int m_MagBufPos;
int m_DelaySize;
int m_DelaySamples;
int m_WindowSamples;
int m_HangTime;
int m_HangTimer;
//QMutex m_Mutex; //for keeping threads from stomping on each other
TYPECPX m_SigDelayBuf[MAX_DELAY_BUF];
double m_MagBuf[MAX_DELAY_BUF];
};
#endif // AGC_IMPL_H
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