src/qmmp/equ/iir_fpu.c



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/*
 *   PCM time-domain equalizer
 *
 *   Copyright (C) 2002-2006  Felipe Rivera <liebremx at users sourceforge net>
 *
 *   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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *   $Id: iir_fpu.c,v 1.4 2006/01/15 00:26:32 liebremx Exp $
 */

#include <stdlib.h>
#include <string.h>
#include "iir_fpu.h"
#include "iir.h"

static sXYData data_history[EQ_MAX_BANDS][EQ_CHANNELS] __attribute__((aligned));
static sXYData data_history2[EQ_MAX_BANDS][EQ_CHANNELS] __attribute__((aligned));
float gain[EQ_MAX_BANDS][EQ_CHANNELS] __attribute__((aligned));
/* random noise */
sample_t dither[256];
int di;

void set_gain(int index, int chn, float val)
{
  gain[index][chn] = val;
}

void clean_history()
{
  int n;
  /* Zero the history arrays */