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.data;
  
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.util.Properties;
  
  import marytts.exceptions.MaryConfigurationException;
  import marytts.util.data.Datagram;
  
  
  public class LPCTimelineReader extends TimelineReader {
      protected int lpcOrder;
      protected float lpcMin;
      protected float lpcRange;
  
      public LPCTimelineReader(String fileName) throws IOException, MaryConfigurationException {
          super();
          load(fileName);
      }
  
      @Override
      protected void load(String fileName) throws IOException, MaryConfigurationException {
          super.load(fileName);
          // Now make sense of the processing header
          Properties props = new Properties();
          ByteArrayInputStream bais = new ByteArrayInputStream(procHdr.getString().getBytes("latin1"));
          props.load(bais);
          ensurePresent(props, "lpc.order");
          lpcOrder = Integer.parseInt(props.getProperty("lpc.order"));
          ensurePresent(props, "lpc.min");
          lpcMin = Float.parseFloat(props.getProperty("lpc.min"));
          ensurePresent(props, "lpc.range");
          lpcRange = Float.parseFloat(props.getProperty("lpc.range"));
      }
  
  
      private void ensurePresent(Properties props, String key) throws IOException {
          if (!props.containsKey(key))
              throw new IOException("Processing header does not contain required field '" + key + "'");
  
      }
  
      public int getLPCOrder() {
          return lpcOrder;
      }
  
      public float getLPCMin() {
          return lpcMin;
      }
  
      public float getLPCRange() {
          return lpcRange;
      }
  
  
      /**
       * Read and return the upcoming datagram.
       *
       * @return the current datagram, or null if EOF was encountered; internally updates the time pointer.
       * @throws IOException
       */
      @Override
      protected Datagram getNextDatagram(ByteBuffer bb) {
  
          Datagram d = null;
          
          /* If the end of the datagram zone is reached, gracefully refuse to read */
          if (bb.position() == timeIdxBytePos) return (null);
          /* Else, pop the datagram out of the file */
          try {
              d = new LPCDatagram(bb, lpcOrder);
          }
          /* Detect a possible EOF encounter */ catch (IOException e) {
              return null;
          }
  
          return (d);
      }
  
  
  }
  
  