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ToneControls.cc

/*
      ToneControls.cc
      
      Copyright 2004-5 Tim Goetze <tim@quitte.de>
      
      http://quitte.de/dsp/

      4-way Eq for amplifier emulation plugins
*/
/*
      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., 59 Temple Place - Suite 330, Boston, MA
      02111-1307, USA or point your web browser to http://www.gnu.org.
*/

#include "basics.h"
#include <stdio.h>

#include "Amp.h"

PreampBand 
ToneControls::bands[] = 
{
      /*  f,    Q,    g */
      {  80, 1.20, 1.61},
      { 300, 1.10, 1.10},
      {1200, 1.14, 1.07},
      {4800,  .80, 1.06}
};

void
ToneControls::init (double fs)
{
      for (int i = 0; i < 4; ++i)
            eq.init_band (i, 2 * bands[i].center * M_PI / fs, bands[i].Q);
}

double 
ToneControls::get_band_gain (int i, double g)
{
      return bands[i].adjust * DSP::db2lin (g);
}

void
ToneControls::set_band_gain (int i, float g)
{
      /* sorry, _ != . but hardly readable -- the difference is between local
       * buffered value and actual Eq band gain */
      eq_gain[i] = g;
      eq.gain[i] = get_band_gain (i, g);
}

void
ToneControls::activate (d_sample ** ports)
{
      for (int i = 0; i < 4; ++i)
            set_band_gain (i, *ports[i]);

      eq.reset();
}



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