content: /**
   * Copyright 2006 DFKI GmbH.
   * All Rights Reserved.  Use is subject to license terms.
   * <p/>
   * This file is part of MARY TTS.
   * <p/>
   * MARY TTS is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation, version 3 of the License.
   * <p/>
   * 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 Lesser General Public License for more details.
   * <p/>
   * 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/>.
   */
  package marytts.unitselection.select;
  
  import marytts.exceptions.MaryConfigurationException;
  import marytts.unitselection.data.Unit;
  
  
  /**
   * A statistical cost function
   *
   * @author Sathish Pammi
   */
  public interface StatisticalCostFunction {
  
      double cost(Unit u1, Unit u2);
  
      /**
       * Initialise this scost cost function by reading the appropriate settings
       * from the MaryProperties using the given configPrefix.
       *
       * @param configPrefix the prefix for the (voice-specific) config entries
       *                     to use when looking up files to load.
       */
      void init(String configPrefix) throws MaryConfigurationException;
  
  
  }
  
  