/*
 * @(#)Sequence.java	1.28 05/11/17
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package javax.sound.midi;

import java.util.Vector;
import com.sun.media.sound.MidiUtils;


/**
 * A <code>Sequence</code> is a data structure containing musical
 * information (often an entire song or composition) that can be played
 * back by a <code>{@link Sequencer}</code> object. Specifically, the
 * <code>Sequence</code> contains timing
 * information and one or more tracks.  Each <code>{@link Track track}</code> consists of a
 * series of MIDI events (such as note-ons, note-offs, program changes, and meta-events).
 * The sequence's timing information specifies the type of unit that is used
 * to time-stamp the events in the sequence.
 * <p>
 * A <code>Sequence</code> can be created from a MIDI file by reading the file
 * into an input stream and invoking one of the <code>getSequence</code> methods of
 * {@link MidiSystem}.  A sequence can also be built from scratch by adding new
 * <code>Tracks</code> to an empty <code>Sequence</code>, and adding
 * <code>{@link MidiEvent}</code> objects to these <code>Tracks</code>.
 *
 * @see Sequencer#setSequence(java.io.InputStream stream)
 * @see Sequencer#setSequence(Sequence sequence)
 * @see Track#add(MidiEvent)
 * @see MidiFileFormat
 *
 * @version 1.28, 05/11/17
 * @author Kara Kytle
 */
public class Sequence {


    // Timing types

    /**
     * The tempo-based timing type, for which the resolution is expressed in pulses (ticks) per quarter note.
     * @see #Sequence(float, int)
     */
    public static final float PPQ							= 0.0f;

    /**
     * The SMPTE-based timing type with 24 frames per second (resolution is expressed in ticks per frame).
     * @see #Sequence(float, int)
     */
    public static final float SMPTE_24						= 24.0f;

    /**
     * The SMPTE-based timing type with 25 frames per second (resolution is expressed in ticks per frame).
     * @see #Sequence(float, int)
     */
    public static final float SMPTE_25						= 25.0f;

    /**
     * The SMPTE-based timing type with 29.97 frames per second (resolution is expressed in ticks per frame).
     * @see #Sequence(float, int)
     */
    public static final float SMPTE_30DROP					= 29.97f;

    /**
     * The SMPTE-based timing type with 30 frames per second (resolution is expressed in ticks per frame).
     * @see #Sequence(float, int)
     */
    public static final float SMPTE_30						= 30.0f;


    // Variables

    /**
     * The timing division type of the sequence.
     * @see #PPQ
     * @see #SMPTE_24
     * @see #SMPTE_25
     * @see #SMPTE_30DROP
     * @see #SMPTE_30
     * @see #getDivisionType
     */
    protected float divisionType;

    /**
     * The timing resolution of the sequence.
     * @see #getResolution
     */
    protected int resolution;

    /**
     * The MIDI tracks in this sequence.
     * @see #getTracks
     */
    protected Vector<Track> tracks = new Vector<Track>();


    /**