/**************************************

		SV_AEC.h

***************************************/



#include "SV_common_include.h"



#define Q_W 31

#define Nfilter_AEC_Outer 80

#define Nfilter_AEC_InEar 200

#if Nfilter_AEC_InEar > Nfilter_AEC_Outer

#define Nfilter_AEC Nfilter_AEC_InEar

#else

#define Nfilter_AEC Nfilter_AEC_Outer

#endif

typedef struct{

	// tuning paramerters

	short	DelayRx;

	short	ValClipp;

	int		Step_aec;

	int		Start_WauxUpdate_sec;



	float	Thr_AECupdate_PwrTx;

	float	Thr_AECupdate_PwrAdfin;

	float	Thr_AECupdate_PwrDiff;

	float	Thr_auxAECupdate_PwrDiff;



	// local buffer/status/variables...

	int		*W;		// Q.31

	int		*Waux;	// Q.31

	int		tx_AEC[FRAMELEN];

	int		tx_AECaux[FRAMELEN];

	int		cnt_NLMSupdate;



	float	pwrDiff_AECinout_dB;

	float	Pwr_Tx_in;



	short	frmVAD_Rx_AEC;

	short	flag_FrmDT;

	short	flag_ringbakctone;

	short   filter_len;

	// flags









}SV_AEC_T;



// Processing

extern float SV_AEC_Exe(int* Outer1_buf, int* Ref_aecin_buf,int n, SV_AEC_T* p_struct);

// Outer1_buf - PCM data where AEC must be applied

// Ref_aecin_buf - Echo reference PCM data

// n - number of samples

// p_struct - pointer to the module structure



// Get parameters

extern short AECStatus_Get_DelayRx(SV_AEC_T* p_struct);

extern short AECStatus_Get_Nfilter_AEC(SV_AEC_T* p_struct);

extern short AECStatus_Get_ValClipp(SV_AEC_T* p_struct);



// Set parameters

extern void SV_AEC_SetPar(float Pwr_Mic1, short frmVAD_Rx_AEC, SV_AEC_T* p_struct);

// flagRingBackTone, int flagFrmDT - parameters to be set

// p_struct - pointer to the module structure



// Init

extern void SV_AEC_Init(int Fs,SV_AEC_T* p_struct);

// Fs - {8000, 16000}

// p_struct - pointer to the module structure (to be initialized)

extern void SV_AEC_Init_for_InEar(int Fs, SV_AEC_T* p_struct);

extern void SV_AEC_Deinit();