libetherpix

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/*
 * EtherPix simulator
 *
 * Copyright 2017 Stefan Schuermans <stefan schuermans info>
 *
 * 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, version 3 of the License.
 *
 *
 * 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 Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
#include <math.h>
#include <stdint.h>
#include "mapping.h"
/// default constructor
Mapping::Mapping():
  m_base(1.0),
  m_factor(0.0),
  m_gamma(1.0)
{
  update();
}
/// constructor based on parameters
Mapping::Mapping(double base, double factor, double gamma):
  m_base(base),
  m_factor(factor),
  m_gamma(gamma)
{
  update();
}
/// update internal mapping table based on parameters
void Mapping::update()
{
  /* mapping formula:
   *   display := base + factor * video ** (1.0 / gamma)
   * display values are coming in via IPv4/UDP
   * simulator needs to show video values
   *   video := ((display - base) / factor) ** gamma
   */
 
 
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