/*	eq.c

This file is part of a program that implements a Software-Defined Radio.

Copyright (C) 2013, 2016, 2017, 2025 Warren Pratt, NR0V

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.

The author can be reached by email at

warren@wpratt.com

*/

#include "comm.h"

int fEQcompare (const void * a, const void * b)
{
	if (*(double*)a < *(double*)b)
		return -1;
	else if (*(double*)a == *(double*)b)
		return 0;
	else
		return 1;
}

double* eq_impulse (int N, int nfreqs, double* F, double* G, double samplerate, double scale, int ctfmode, int wintype)
{
	// check for previous in the cache
	struct Params
	{
		int		N;
		int		nfreqs;
		int		ctfmode;
		int		wintype;
		double	samplerate;
		double	scale;
	};

	struct Params params;
	memset(&params, 0, sizeof(params));
	params.N = N;
	params.nfreqs = nfreqs;
	params.ctfmode = ctfmode;
	params.wintype = wintype;
	params.samplerate = samplerate;
	params.scale = scale;

	HASH_T h = fnv1a_hash(&params, sizeof(params));

	size_t arr_len = (nfreqs + 1) * sizeof(double);
	HASH_T hf = fnv1a_hash((uint8_t*)F, arr_len);
	h ^= hf + GOLDEN_RATIO + (h << 6) + (h >> 2);
	HASH_T hg = fnv1a_hash((uint8_t*)G, arr_len);
	h ^= hg + GOLDEN_RATIO + (h << 6) + (h >> 2);

	double* imp = get_impulse_cache_entry(EQ_CACHE, h, N);
	if (imp) return imp;
	//

	double* fp = (double *) malloc0 ((nfreqs + 2)	* sizeof (double));
	double* gp = (double *) malloc0 ((nfreqs + 2)	* sizeof (double));
	double* A  = (double *) malloc0 ((N / 2 + 1) * sizeof (double));
	double* sary = (double *) malloc0 (2 * nfreqs * sizeof (double));
	double gpreamp, f, frac;
	double* impulse;
	int i, j, mid;
	fp[0] = 0.0;
	fp[nfreqs + 1] = 1.0;
	gpreamp = G[0];
	for (i = 1; i <= nfreqs; i++)
	{
		fp[i] = 2.0 * F[i] / samplerate;
		if (fp[i] < 0.0) fp[i] = 0.0;
		if (fp[i] > 1.0) fp[i] = 1.0;
		gp[i] = G[i];
	}
	for (i = 1, j = 0; i <= nfreqs; i++, j+=2)
	{
		sary[j + 0] = fp[i];
		sary[j + 1] = gp[i];
	}
	qsort (sary, nfreqs, 2 * sizeof (double), fEQcompare);
	for (i = 1, j = 0; i <= nfreqs; i++, j+=2)
	{
		fp[i] = sary[j + 0];
		gp[i] = sary[j + 1];
	}
	gp[0] = gp[1];
	gp[nfreqs + 1] = gp[nfreqs];
	mid = N / 2;
	j = 0;
	if (N & 1)
	{
		for (i = 0; i <= mid; i++)
		{
			f = (double)i / (double)mid;
			while (f > fp[j + 1]) j++;
			frac = (f - fp[j]) / (fp[j + 1] - fp[j]);
			A[i] = pow (10.0, 0.05 * (frac * gp[j + 1] + (1.0 - frac) * gp[j] + gpreamp)) * scale;
		}
	}
	else
	{
		for (i = 0; i < mid; i++)
		{
			f = ((double)i + 0.5) / (double)mid;
			while (f > fp[j + 1]) j++;
			frac = (f - fp[j]) / (fp[j + 1] - fp[j]);
			A[i] = pow (10.0, 0.05 * (frac * gp[j + 1] + (1.0 - frac) * gp[j] + gpreamp)) * scale;
		}
	}
	if (ctfmode == 0)
	{
		int k, low, high;
		double lowmag, highmag, flow4, fhigh4;
		if (N & 1)
		{
			low = (int)(fp[1] * mid);
			high = (int)(fp[nfreqs] * mid + 0.5);
			lowmag = A[low];
			highmag = A[high];
			flow4 = pow((double)low / (double)mid, 4.0);
			fhigh4 = pow((double)high / (double)mid, 4.0);
			k = low;
			while (--k >= 0)
			{
				f = (double)k / (double)mid;
				lowmag *= (f * f * f * f) / flow4;
				if (lowmag < 1.0e-100) lowmag = 1.0e-100;
				A[k] = lowmag;
			}
			k = high;
			while (++k <= mid)
			{
				f = (double)k / (double)mid;
				highmag *= fhigh4 / (f * f * f * f);
				if (highmag < 1.0e-100) highmag = 1.0e-100;
				A[k] = highmag;
			}
		}
		else
		{
			low = (int)(fp[1] * mid - 0.5);
			high = (int)(fp[nfreqs] * mid - 0.5);
			lowmag = A[low];
			highmag = A[high];
			flow4 = pow((double)low / (double)mid, 4.0);
			fhigh4 = pow((double)high / (double)mid, 4.0);
			k = low;
			while (--k >= 0)
			{
				f = (double)k / (double)mid;
				lowmag *= (f * f * f * f) / flow4;
				if (lowmag < 1.0e-100) lowmag = 1.0e-100;
				A[k] = lowmag;
			}
			k = high;
			while (++k < mid)
			{
				f = (double)k / (double)mid;
				highmag *= fhigh4 / (f * f * f * f);
				if (highmag < 1.0e-100) highmag = 1.0e-100;
				A[k] = highmag;
			}
		}
	}
	if (N & 1)
		impulse = fir_fsamp_odd(N, A, 1, 1.0, wintype);
	else
		impulse = fir_fsamp(N, A, 1, 1.0, wintype);
	// print_impulse("eq.txt", N, impulse, 1, 0);
	_aligned_free (sary);
	_aligned_free (A);
	_aligned_free (gp);
	_aligned_free (fp);

	// store in cache
	add_impulse_to_cache(EQ_CACHE, h, N, impulse);

	return impulse;
}

/********************************************************************************************************
*																										*
*									Partitioned Overlap-Save Equalizer									*
*																										*
********************************************************************************************************/

EQP create_eqp (int run, int size, int nc, int mp, double *in, double *out, int nfreqs, double* F, double* G, int ctfmode, int wintype, int samplerate)
{
	// NOTE:  'nc' must be >= 'size'
	EQP a = (EQP) malloc0 (sizeof (eqp));
	double* impulse;
	a->run = run;
	a->size = size;
	a->nc = nc;
	a->mp = mp;
	a->in = in;
	a->out = out;
	a->nfreqs = nfreqs;
	a->F = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->G = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	memcpy (a->F, F, (nfreqs + 1) * sizeof (double));
	memcpy (a->G, G, (nfreqs + 1) * sizeof (double));
	a->ctfmode = ctfmode;
	a->wintype = wintype;
	a->samplerate = (double)samplerate;
	impulse = eq_impulse (a->nc, a->nfreqs, a->F, a->G, a->samplerate, 1.0 / (2.0 * a->size), a->ctfmode, a->wintype);
	a->p = create_fircore (a->size, a->in, a->out, a->nc, a->mp, impulse);
	_aligned_free (impulse);
	return a;
}

void destroy_eqp (EQP a)
{
	destroy_fircore (a->p);
	_aligned_free (a);
}

void flush_eqp (EQP a)
{
	flush_fircore (a->p);
}

void xeqp (EQP a)
{
	if (a->run)
		xfircore (a->p);
	else
		memcpy (a->out, a->in, a->size * sizeof (complex));
}

void setBuffers_eqp (EQP a, double* in, double* out)
{
	a->in = in;
	a->out = out;
	setBuffers_fircore (a->p, a->in, a->out);
}

void setSamplerate_eqp (EQP a, int rate)
{
	double* impulse;
	a->samplerate = rate;
	impulse = eq_impulse (a->nc, a->nfreqs, a->F, a->G, a->samplerate, 1.0 / (2.0 * a->size), a->ctfmode, a->wintype);
	setImpulse_fircore (a->p, impulse, 1);
	_aligned_free (impulse);
}

void setSize_eqp (EQP a, int size)
{
	double* impulse;
	a->size = size;
	setSize_fircore (a->p, a->size);
	impulse = eq_impulse (a->nc, a->nfreqs, a->F, a->G, a->samplerate, 1.0 / (2.0 * a->size), a->ctfmode, a->wintype);
	setImpulse_fircore (a->p, impulse, 1);
	_aligned_free (impulse);
}

/********************************************************************************************************
*																										*
*							Partitioned Overlap-Save Equalizer:	 RXA Properties							*
*																										*
********************************************************************************************************/

PORT
void SetRXAEQRun (int channel, int run)
{
	EnterCriticalSection (&ch[channel].csDSP);
	rxa[channel].eqp.p->run = run;
	LeaveCriticalSection (&ch[channel].csDSP);
}

PORT
void SetRXAEQNC (int channel, int nc)
{
	EQP a;
	double* impulse;
	EnterCriticalSection (&ch[channel].csDSP);
	a = rxa[channel].eqp.p;
	if (a->nc != nc)
	{
		a->nc = nc;
		impulse = eq_impulse (a->nc, a->nfreqs, a->F, a->G, a->samplerate, 1.0 / (2.0 * a->size), a->ctfmode, a->wintype);
		setNc_fircore (a->p, a->nc, impulse);
		_aligned_free (impulse);
	}
	LeaveCriticalSection (&ch[channel].csDSP);
}

PORT
void SetRXAEQMP (int channel, int mp)
{
	EQP a;
	a = rxa[channel].eqp.p;
	if (a->mp != mp)
	{
		a->mp = mp;
		setMp_fircore (a->p, a->mp);
	}
}

PORT
void SetRXAEQProfile (int channel, int nfreqs, double* F, double* G)
{
	EQP a;
	double* impulse;
	a = rxa[channel].eqp.p;
	_aligned_free (a->G);
	_aligned_free (a->F);
	a->nfreqs = nfreqs;
	a->F = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->G = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	memcpy (a->F, F, (nfreqs + 1) * sizeof (double));
	memcpy (a->G, G, (nfreqs + 1) * sizeof (double));
	impulse = eq_impulse (a->nc, a->nfreqs, a->F, a->G,
		a->samplerate, 1.0 / (2.0 * a->size), a->ctfmode, a->wintype);
	setImpulse_fircore (a->p, impulse, 1);
	_aligned_free (impulse);
}

PORT
void SetRXAEQCtfmode (int channel, int mode)
{
	EQP a;
	double* impulse;
	a = rxa[channel].eqp.p;
	a->ctfmode = mode;
	impulse = eq_impulse (a->nc, a->nfreqs, a->F, a->G, a->samplerate, 1.0 / (2.0 * a->size), a->ctfmode, a->wintype);
	setImpulse_fircore (a->p, impulse, 1);
	_aligned_free (impulse);
}

PORT
void SetRXAEQWintype (int channel, int wintype)
{
	EQP a;
	double* impulse;
	a = rxa[channel].eqp.p;
	a->wintype = wintype;
	impulse = eq_impulse (a->nc, a->nfreqs, a->F, a->G, a->samplerate, 1.0 / (2.0 * a->size), a->ctfmode, a->wintype);
	setImpulse_fircore (a->p, impulse, 1);
	_aligned_free (impulse);
}

PORT
void SetRXAGrphEQ (int channel, int *rxeq)
{	// three band equalizer (legacy compatibility)
	EQP a;
	double* impulse;
	a = rxa[channel].eqp.p;
	_aligned_free (a->G);
	_aligned_free (a->F);
	a->nfreqs = 4;
	a->F = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->G = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->F[1] =  150.0;
	a->F[2] =  400.0;
	a->F[3] = 1500.0;
	a->F[4] = 6000.0;
	a->G[0] = (double)rxeq[0];
	a->G[1] = (double)rxeq[1];
	a->G[2] = (double)rxeq[1];
	a->G[3] = (double)rxeq[2];
	a->G[4] = (double)rxeq[3];
	a->ctfmode = 0;
	impulse = eq_impulse (a->nc, a->nfreqs, a->F, a->G, a->samplerate, 1.0 / (2.0 * a->size), a->ctfmode, a->wintype);
	setImpulse_fircore (a->p, impulse, 1);
	_aligned_free (impulse);
}

PORT
void SetRXAGrphEQ10 (int channel, int *rxeq)
{	// ten band equalizer (legacy compatibility)
	EQP a;
	double* impulse;
	int i;
	a = rxa[channel].eqp.p;
	_aligned_free (a->G);
	_aligned_free (a->F);
	a->nfreqs = 10;
	a->F = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->G = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->F[1]	 =	  32.0;
	a->F[2]	 =	  63.0;
	a->F[3]	 =	 125.0;
	a->F[4]	 =	 250.0;
	a->F[5]	 =	 500.0;
	a->F[6]	 =	1000.0;
	a->F[7]	 =	2000.0;
	a->F[8]	 =	4000.0;
	a->F[9]	 =	8000.0;
	a->F[10] = 16000.0;
	for (i = 0; i <= a->nfreqs; i++)
		a->G[i] = (double)rxeq[i];
	a->ctfmode = 0;
	impulse = eq_impulse (a->nc, a->nfreqs, a->F, a->G, a->samplerate, 1.0 / (2.0 * a->size), a->ctfmode, a->wintype);
	// print_impulse ("rxeq.txt", a->nc, impulse, 1, 0);
	setImpulse_fircore (a->p, impulse, 1);
	_aligned_free (impulse);
}

/********************************************************************************************************
*																										*
*							Partitioned Overlap-Save Equalizer:	 TXA Properties							*
*																										*
********************************************************************************************************/

PORT
void SetTXAEQRun (int channel, int run)
{
	EnterCriticalSection (&ch[channel].csDSP);
	txa[channel].eqp.p->run = run;
	LeaveCriticalSection (&ch[channel].csDSP);
}

PORT
void SetTXAEQNC (int channel, int nc)
{
	EQP a;
	double* impulse;
	EnterCriticalSection (&ch[channel].csDSP);
	a = txa[channel].eqp.p;
	if (a->nc != nc)
	{
		a->nc = nc;
		impulse = eq_impulse (a->nc, a->nfreqs, a->F, a->G, a->samplerate, 1.0 / (2.0 * a->size), a->ctfmode, a->wintype);
		setNc_fircore (a->p, a->nc, impulse);
		_aligned_free (impulse);
	}
	LeaveCriticalSection (&ch[channel].csDSP);
}

PORT
void SetTXAEQMP (int channel, int mp)
{
	EQP a;
	a = txa[channel].eqp.p;
	if (a->mp != mp)
	{
		a->mp = mp;
		setMp_fircore (a->p, a->mp);
	}
}

PORT
void SetTXAEQProfile (int channel, int nfreqs, double* F, double* G)
{
	EQP a;
	double* impulse;
	a = txa[channel].eqp.p;
	_aligned_free (a->G);
	_aligned_free (a->F);
	a->nfreqs = nfreqs;
	a->F = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->G = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	memcpy (a->F, F, (nfreqs + 1) * sizeof (double));
	memcpy (a->G, G, (nfreqs + 1) * sizeof (double));
	impulse = eq_impulse (a->nc, a->nfreqs, a->F, a->G, a->samplerate, 1.0 / (2.0 * a->size), a->ctfmode, a->wintype);
	setImpulse_fircore (a->p, impulse, 1);
	_aligned_free (impulse);
}

PORT
void SetTXAEQCtfmode (int channel, int mode)
{
	EQP a;
	double* impulse;
	a = txa[channel].eqp.p;
	a->ctfmode = mode;
	impulse = eq_impulse (a->nc, a->nfreqs, a->F, a->G, a->samplerate, 1.0 / (2.0 * a->size), a->ctfmode, a->wintype);
	setImpulse_fircore (a->p, impulse, 1);
	_aligned_free (impulse);
}

PORT
void SetTXAEQWintype (int channel, int wintype)
{
	EQP a;
	double* impulse;
	a = txa[channel].eqp.p;
	a->wintype = wintype;
	impulse = eq_impulse (a->nc, a->nfreqs, a->F, a->G, a->samplerate, 1.0 / (2.0 * a->size), a->ctfmode, a->wintype);
	setImpulse_fircore (a->p, impulse, 1);
	_aligned_free (impulse);
}

PORT
void SetTXAGrphEQ (int channel, int *txeq)
{	// three band equalizer (legacy compatibility)
	EQP a;
	double* impulse;
	a = txa[channel].eqp.p;
	_aligned_free (a->G);
	_aligned_free (a->F);
	a->nfreqs = 4;
	a->F = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->G = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->F[1] =  150.0;
	a->F[2] =  400.0;
	a->F[3] = 1500.0;
	a->F[4] = 6000.0;
	a->G[0] = (double)txeq[0];
	a->G[1] = (double)txeq[1];
	a->G[2] = (double)txeq[1];
	a->G[3] = (double)txeq[2];
	a->G[4] = (double)txeq[3];
	a->ctfmode = 0;
	impulse = eq_impulse (a->nc, a->nfreqs, a->F, a->G, a->samplerate, 1.0 / (2.0 * a->size), a->ctfmode, a->wintype);
	setImpulse_fircore (a->p, impulse, 1);
	_aligned_free (impulse);
}

PORT
void SetTXAGrphEQ10 (int channel, int *txeq)
{	// ten band equalizer (legacy compatibility)
	EQP a;
	double* impulse;
	int i;
	a = txa[channel].eqp.p;
	_aligned_free (a->G);
	_aligned_free (a->F);
	a->nfreqs = 10;
	a->F = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->G = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->F[1]	 =	  32.0;
	a->F[2]	 =	  63.0;
	a->F[3]	 =	 125.0;
	a->F[4]	 =	 250.0;
	a->F[5]	 =	 500.0;
	a->F[6]	 =	1000.0;
	a->F[7]	 =	2000.0;
	a->F[8]	 =	4000.0;
	a->F[9]	 =	8000.0;
	a->F[10] = 16000.0;
	for (i = 0; i <= a->nfreqs; i++)
		a->G[i] = (double)txeq[i];
	a->ctfmode = 0;
	impulse = eq_impulse (a->nc, a->nfreqs, a->F, a->G, a->samplerate, 1.0 / (2.0 * a->size), a->ctfmode, a->wintype);
	setImpulse_fircore (a->p, impulse, 1);
	_aligned_free (impulse);
}

/********************************************************************************************************
*																										*
*											Overlap-Save Equalizer										*
*																										*
********************************************************************************************************/


double* eq_mults (int size, int nfreqs, double* F, double* G, double samplerate, double scale, int ctfmode, int wintype)
{
	double* impulse = eq_impulse (size + 1, nfreqs, F, G, samplerate, scale, ctfmode, wintype);
	double* mults = fftcv_mults(2 * size, impulse);
	_aligned_free (impulse);
	return mults;
}

void calc_eq (EQ a)
{
	a->scale = 1.0 / (double)(2 * a->size);
	a->infilt = (double *)malloc0(2 * a->size * sizeof(complex));
	a->product = (double *)malloc0(2 * a->size * sizeof(complex));
	a->CFor = fftw_plan_dft_1d(2 * a->size, (fftw_complex *)a->infilt, (fftw_complex *)a->product, FFTW_FORWARD, FFTW_PATIENT);
	a->CRev = fftw_plan_dft_1d(2 * a->size, (fftw_complex *)a->product, (fftw_complex *)a->out, FFTW_BACKWARD, FFTW_PATIENT);
	a->mults = eq_mults(a->size, a->nfreqs, a->F, a->G, a->samplerate, a->scale, a->ctfmode, a->wintype);
}

void decalc_eq (EQ a)
{
	fftw_destroy_plan(a->CRev);
	fftw_destroy_plan(a->CFor);
	_aligned_free(a->mults);
	_aligned_free(a->product);
	_aligned_free(a->infilt);
}

EQ create_eq (int run, int size, double *in, double *out, int nfreqs, double* F, double* G, int ctfmode, int wintype, int samplerate)
{
	EQ a = (EQ) malloc0 (sizeof (eq));
	a->run = run;
	a->size = size;
	a->in = in;
	a->out = out;
	a->nfreqs = nfreqs;
	a->F = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->G = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	memcpy (a->F, F, (nfreqs + 1) * sizeof (double));
	memcpy (a->G, G, (nfreqs + 1) * sizeof (double));
	a->ctfmode = ctfmode;
	a->wintype = wintype;
	a->samplerate = (double)samplerate;
	calc_eq (a);
	return a;
}

void destroy_eq (EQ a)
{
	decalc_eq (a);
	_aligned_free (a->G);
	_aligned_free (a->F);
	_aligned_free (a);
}

void flush_eq (EQ a)
{
	memset (a->infilt, 0, 2 * a->size * sizeof (complex));
}

void xeq (EQ a)
{
	int i;
	double I, Q;
	if (a->run)
	{
		memcpy (&(a->infilt[2 * a->size]), a->in, a->size * sizeof (complex));
		fftw_execute (a->CFor);
		for (i = 0; i < 2 * a->size; i++)
		{
			I = a->product[2 * i + 0];
			Q = a->product[2 * i + 1];
			a->product[2 * i + 0] = I * a->mults[2 * i + 0] - Q * a->mults[2 * i + 1];
			a->product[2 * i + 1] = I * a->mults[2 * i + 1] + Q * a->mults[2 * i + 0];
		}
		fftw_execute (a->CRev);
		memcpy (a->infilt, &(a->infilt[2 * a->size]), a->size * sizeof(complex));
	}
	else if (a->in != a->out)
		memcpy (a->out, a->in, a->size * sizeof (complex));
}

void setBuffers_eq (EQ a, double* in, double* out)
{
	decalc_eq (a);
	a->in = in;
	a->out = out;
	calc_eq (a);
}

void setSamplerate_eq (EQ a, int rate)
{
	decalc_eq (a);
	a->samplerate = rate;
	calc_eq (a);
}

void setSize_eq (EQ a, int size)
{
	decalc_eq (a);
	a->size = size;
	calc_eq (a);
}

/********************************************************************************************************
*																										*
*								Overlap-Save Equalizer:	 RXA Properties									*
*																										*
********************************************************************************************************/
/*	// UNCOMMENT properties when a pointer is in place in rxa[channel]
PORT
void SetRXAEQRun (int channel, int run)
{
	EnterCriticalSection (&ch[channel].csDSP);
	rxa[channel].eq.p->run = run;
	LeaveCriticalSection (&ch[channel].csDSP);
}

PORT
void SetRXAEQProfile (int channel, int nfreqs, double* F, double* G)
{
	EQ a;
	EnterCriticalSection (&ch[channel].csDSP);
	a = rxa[channel].eq.p;
	_aligned_free (a->G);
	_aligned_free (a->F);
	a->nfreqs = nfreqs;
	a->F = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->G = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	memcpy (a->F, F, (nfreqs + 1) * sizeof (double));
	memcpy (a->G, G, (nfreqs + 1) * sizeof (double));
	_aligned_free (a->mults);
	a->mults = eq_mults (a->size, a->nfreqs, a->F, a->G, a->samplerate, a->scale, a->ctfmode, a->wintype);
	LeaveCriticalSection (&ch[channel].csDSP);
}

PORT
void SetRXAEQCtfmode (int channel, int mode)
{
	EQ a;
	EnterCriticalSection (&ch[channel].csDSP);
	a = rxa[channel].eq.p;
	a->ctfmode = mode;
	_aligned_free (a->mults);
	a->mults = eq_mults (a->size, a->nfreqs, a->F, a->G, a->samplerate, a->scale, a->ctfmode, a->wintype);
	LeaveCriticalSection (&ch[channel].csDSP);
}

PORT
void SetRXAEQWintype (int channel, int wintype)
{
	EQ a;
	EnterCriticalSection (&ch[channel].csDSP);
	a = rxa[channel].eq.p;
	a->wintype = wintype;
	_aligned_free (a->mults);
	a->mults = eq_mults (a->size, a->nfreqs, a->F, a->G, a->samplerate, a->scale, a->ctfmode, a->wintype);
	LeaveCriticalSection (&ch[channel].csDSP);
}

PORT
void SetRXAGrphEQ (int channel, int *rxeq)
{	// three band equalizer (legacy compatibility)
	EQ a;
	EnterCriticalSection (&ch[channel].csDSP);
	a = rxa[channel].eq.p;
	_aligned_free (a->G);
	_aligned_free (a->F);
	a->nfreqs = 4;
	a->F = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->G = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->F[1] =  150.0;
	a->F[2] =  400.0;
	a->F[3] = 1500.0;
	a->F[4] = 6000.0;
	a->G[0] = (double)rxeq[0];
	a->G[1] = (double)rxeq[1];
	a->G[2] = (double)rxeq[1];
	a->G[3] = (double)rxeq[2];
	a->G[4] = (double)rxeq[3];
	a->ctfmode = 0;
	_aligned_free (a->mults);
	a->mults = eq_mults (a->size, a->nfreqs, a->F, a->G, a->samplerate, a->scale, a->ctfmode, a->wintype);
	LeaveCriticalSection (&ch[channel].csDSP);
}

PORT
void SetRXAGrphEQ10 (int channel, int *rxeq)
{	// ten band equalizer (legacy compatibility)
	EQ a;
	int i;
	EnterCriticalSection (&ch[channel].csDSP);
	a = rxa[channel].eq.p;
	_aligned_free (a->G);
	_aligned_free (a->F);
	a->nfreqs = 10;
	a->F = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->G = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->F[1]	 =	  32.0;
	a->F[2]	 =	  63.0;
	a->F[3]	 =	 125.0;
	a->F[4]	 =	 250.0;
	a->F[5]	 =	 500.0;
	a->F[6]	 =	1000.0;
	a->F[7]	 =	2000.0;
	a->F[8]	 =	4000.0;
	a->F[9]	 =	8000.0;
	a->F[10] = 16000.0;
	for (i = 0; i <= a->nfreqs; i++)
		a->G[i] = (double)rxeq[i];
	a->ctfmode = 0;
	_aligned_free (a->mults);
	a->mults = eq_mults (a->size, a->nfreqs, a->F, a->G, a->samplerate, a->scale, a->ctfmode, a->wintype);
	LeaveCriticalSection (&ch[channel].csDSP);
}
*/
/********************************************************************************************************
*																										*
*								Overlap-Save Equalizer:	 TXA Properties									*
*																										*
********************************************************************************************************/
/*	// UNCOMMENT properties when a pointer is in place in rxa[channel]
PORT
void SetTXAEQRun (int channel, int run)
{
	EnterCriticalSection (&ch[channel].csDSP);
	txa[channel].eq.p->run = run;
	LeaveCriticalSection (&ch[channel].csDSP);
}

PORT
void SetTXAEQProfile (int channel, int nfreqs, double* F, double* G)
{
	EQ a;
	EnterCriticalSection (&ch[channel].csDSP);
	a = txa[channel].eq.p;
	_aligned_free (a->G);
	_aligned_free (a->F);
	a->nfreqs = nfreqs;
	a->F = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->G = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	memcpy (a->F, F, (nfreqs + 1) * sizeof (double));
	memcpy (a->G, G, (nfreqs + 1) * sizeof (double));
	_aligned_free (a->mults);
	a->mults = eq_mults (a->size, a->nfreqs, a->F, a->G, a->samplerate, a->scale, a->ctfmode, a->wintype);
	LeaveCriticalSection (&ch[channel].csDSP);
}

PORT
void SetTXAEQCtfmode (int channel, int mode)
{
	EQ a;
	EnterCriticalSection (&ch[channel].csDSP);
	a = txa[channel].eq.p;
	a->ctfmode = mode;
	_aligned_free (a->mults);
	a->mults = eq_mults (a->size, a->nfreqs, a->F, a->G, a->samplerate, a->scale, a->ctfmode, a->wintype);
	LeaveCriticalSection (&ch[channel].csDSP);
}

PORT
void SetTXAEQMethod (int channel, int wintype)
{
	EQ a;
	EnterCriticalSection (&ch[channel].csDSP);
	a = txa[channel].eq.p;
	a->wintype = wintype;
	_aligned_free (a->mults);
	a->mults = eq_mults (a->size, a->nfreqs, a->F, a->G, a->samplerate, a->scale, a->ctfmode, a->wintype);
	LeaveCriticalSection (&ch[channel].csDSP);
}

PORT
void SetTXAGrphEQ (int channel, int *txeq)
{	// three band equalizer (legacy compatibility)
	EQ a;
	EnterCriticalSection (&ch[channel].csDSP);
	a = txa[channel].eq.p;
	_aligned_free (a->G);
	_aligned_free (a->F);
	a->nfreqs = 4;
	a->F = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->G = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->F[1] =  150.0;
	a->F[2] =  400.0;
	a->F[3] = 1500.0;
	a->F[4] = 6000.0;
	a->G[0] = (double)txeq[0];
	a->G[1] = (double)txeq[1];
	a->G[2] = (double)txeq[1];
	a->G[3] = (double)txeq[2];
	a->G[4] = (double)txeq[3];
	a->ctfmode = 0;
	_aligned_free (a->mults);
	a->mults = eq_mults (a->size, a->nfreqs, a->F, a->G, a->samplerate, a->scale, a->ctfmode, a->wintype);
	LeaveCriticalSection (&ch[channel].csDSP);
}

PORT
void SetTXAGrphEQ10 (int channel, int *txeq)
{	// ten band equalizer (legacy compatibility)
	EQ a;
	int i;
	EnterCriticalSection (&ch[channel].csDSP);
	a = txa[channel].eq.p;
	_aligned_free (a->G);
	_aligned_free (a->F);
	a->nfreqs = 10;
	a->F = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->G = (double *) malloc0 ((a->nfreqs + 1) * sizeof (double));
	a->F[1]	 =	  32.0;
	a->F[2]	 =	  63.0;
	a->F[3]	 =	 125.0;
	a->F[4]	 =	 250.0;
	a->F[5]	 =	 500.0;
	a->F[6]	 =	1000.0;
	a->F[7]	 =	2000.0;
	a->F[8]	 =	4000.0;
	a->F[9]	 =	8000.0;
	a->F[10] = 16000.0;
	for (i = 0; i <= a->nfreqs; i++)
		a->G[i] = (double)txeq[i];
	a->ctfmode = 0;
	_aligned_free (a->mults);
	a->mults = eq_mults (a->size, a->nfreqs, a->F, a->G, a->samplerate, a->scale, a->ctfmode, a->wintype);
	LeaveCriticalSection (&ch[channel].csDSP);
}
*/