MidiTickUtil.java

package org.herac.tuxguitar.gui.util;

import org.herac.tuxguitar.gui.TuxGuitar;
import org.herac.tuxguitar.player.base.MidiRepeatController;
import org.herac.tuxguitar.song.managers.TGSongManager;
import org.herac.tuxguitar.song.models.TGMeasureHeader;

public class MidiTickUtil {

  public static int getEHeader() {
    return TuxGuitar.instance().getPlayer().getLoopEHeader();
  }

  public static int getSHeader() {
    return TuxGuitar.instance().getPlayer().getLoopSHeader();
  }

  public static long getStart(long tick) {
    long startPoint = getStartPoint();
    long start = startPoint;
    long length = 0;

    TGSongManager manager = TuxGuitar.instance().getSongManager();
    MidiRepeatController controller = new MidiRepeatController(manager
        .getSong(), getSHeader(), getEHeader());
    while (!controller.finished()) {
      TGMeasureHeader header = manager.getSong().getMeasureHeader(
          controller.getIndex());
      controller.process();
      if (controller.shouldPlay()) {

        start += length;
        length = header.getLength();

        // verifico si es el compas correcto
        if (tick >= start && tick < (start + length)) {
          return header.getStart() + (tick - start);
        }
      }
    }
    return (tick < startPoint ? startPoint : start);
  }

  private static long getStartPoint() {
    TuxGuitar.instance().getPlayer().updateLoop(false);
    return TuxGuitar.instance().getPlayer().getLoopSPosition();
  }

  public static long getTick(long start) {
    long startPoint = getStartPoint();
    long tick = startPoint;
    long length = 0;

    TGSongManager manager = TuxGuitar.instance().getSongManager();
    MidiRepeatController controller = new MidiRepeatController(manager
        .getSong(), getSHeader(), getEHeader());
    while (!controller.finished()) {
      TGMeasureHeader header = manager.getSong().getMeasureHeader(
          controller.getIndex());
      controller.process();
      if (controller.shouldPlay()) {

        tick += length;
        length = header.getLength();

        // verifico si es el compas correcto
        if (start >= header.getStart() && start < (header.getStart() + length)) {
          return tick;
        }
      }
    }
    return (start < startPoint ? startPoint : tick);
  }
}