- /*
- * @(#)MidiFileFormat.java 1.17 03/12/19
- *
- * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
- * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
- */
-
- package javax.sound.midi;
-
- import java.io.InputStream;
- import java.io.IOException;
- import java.util.Collections;
- import java.util.HashMap;
- import java.util.Map;
-
-
- /**
- * A <code>MidiFileFormat</code> object encapsulates a MIDI file's
- * type, as well as its length and timing information.
- *
- * <p>A <code>MidiFileFormat</code> object can
- * include a set of properties. A property is a pair of key and value:
- * the key is of type <code>String</code>, the associated property
- * value is an arbitrary object.
- * Properties specify additional informational
- * meta data (like a author, or copyright).
- * Properties are optional information, and file reader and file
- * writer implementations are not required to provide or
- * recognize properties.
- *
- * <p>The following table lists some common properties that should
- * be used in implementations:
- *
- * <table border=1>
- * <tr>
- * <th>Property key</th>
- * <th>Value type</th>
- * <th>Description</th>
- * </tr>
- * <tr>
- * <td>"author"</td>
- * <td>{@link java.lang.String String}</td>
- * <td>name of the author of this file</td>
- * </tr>
- * <tr>
- * <td>"title"</td>
- * <td>{@link java.lang.String String}</td>
- * <td>title of this file</td>
- * </tr>
- * <tr>
- * <td>"copyright"</td>
- * <td>{@link java.lang.String String}</td>
- * <td>copyright message</td>
- * </tr>
- * <tr>
- * <td>"date"</td>
- * <td>{@link java.util.Date Date}</td>
- * <td>date of the recording or release</td>
- * </tr>
- * <tr>
- * <td>"comment"</td>
- * <td>{@link java.lang.String String}</td>
- * <td>an arbitrary text</td>
- * </tr>
- * </table>
- *
- * @see MidiSystem#getMidiFileFormat(java.io.File)
- * @see Sequencer#setSequence(java.io.InputStream stream)
- *
- * @version 1.17, 03/12/19
- * @author Kara Kytle
- * @author Florian Bomers
- */
-
- public class MidiFileFormat {
-
-
- /**
- * Represents unknown length.
- * @see #getByteLength
- * @see #getMicrosecondLength
- */
- public static final int UNKNOWN_LENGTH = -1;
-
-
- /**
- * The type of MIDI file.
- */
- protected int type;
-
- /**
- * The division type of the MIDI file.
- *
- * @see Sequence#PPQ
- * @see Sequence#SMPTE_24
- * @see Sequence#SMPTE_25
- * @see Sequence#SMPTE_30DROP
- * @see Sequence#SMPTE_30
- */
- protected float divisionType;
-
- /**
- * The timing resolution of the MIDI file.
- */
- protected int resolution;
-
- /**
- * The length of the MIDI file in bytes.
- */
- protected int byteLength;
-
- /**
- * The duration of the MIDI file in microseconds.
- */
- protected long microsecondLength;
-
-
- /** The set of properties */
- private HashMap<String, Object> properties;
-
-
- /**
- * Constructs a <code>MidiFileFormat</code>.
- *
- * @param type the MIDI file type (0, 1, or 2)
- * @param divisionType the timing division type (PPQ or one of the SMPTE types)
- * @param resolution the timing resolution
- * @param bytes the length of the MIDI file in bytes, or UNKNOWN_LENGTH if not known
- * @param microseconds the duration of the file in microseconds, or UNKNOWN_LENGTH if not known
- * @see #UNKNOWN_LENGTH
- * @see Sequence#PPQ
- * @see Sequence#SMPTE_24
- * @see Sequence#SMPTE_25
- * @see Sequence#SMPTE_30DROP
- * @see Sequence#SMPTE_30
- */
- public MidiFileFormat(int type, float divisionType, int resolution, int bytes, long microseconds) {
-
- this.type = type;
- this.divisionType = divisionType;
- this.resolution = resolution;
- this.byteLength = bytes;
- this.microsecondLength = microseconds;
- this.properties = null;
- }
-
-
- /**
- * Construct a <code>MidiFileFormat</code> with a set of properties.
- *
- * @param type the MIDI file type (0, 1, or 2)
- * @param divisionType the timing division type
- * (PPQ or one of the SMPTE types)
- * @param resolution the timing resolution
- * @param bytes the length of the MIDI file in bytes,
- * or UNKNOWN_LENGTH if not known
- * @param microseconds the duration of the file in microseconds,
- * or UNKNOWN_LENGTH if not known
- * @param properties a <code>Map<String,Object></code> object
- * with properties
- *
- * @see #UNKNOWN_LENGTH
- * @see Sequence#PPQ
- * @see Sequence#SMPTE_24
- * @see Sequence#SMPTE_25
- * @see Sequence#SMPTE_30DROP
- * @see Sequence#SMPTE_30
- * @since 1.5
- */
- public MidiFileFormat(int type, float divisionType,
- int resolution, int bytes,
- long microseconds, Map<String, Object> properties) {
- this(type, divisionType, resolution, bytes, microseconds);
- this.properties = new HashMap<String, Object>(properties);
- }
-
-
-
- /**
- * Obtains the MIDI file type.
- * @return the file's type (0, 1, or 2)
- */
- public int getType() {
- return type;
- }
-
- /**
- * Obtains the timing division type for the MIDI file.
- *
- * @return the division type (PPQ or one of the SMPTE types)
- *
- * @see Sequence#Sequence(float, int)
- * @see Sequence#PPQ
- * @see Sequence#SMPTE_24
- * @see Sequence#SMPTE_25
- * @see Sequence#SMPTE_30DROP
- * @see Sequence#SMPTE_30
- * @see Sequence#getDivisionType()
- */
- public float getDivisionType() {
- return divisionType;
- }
-
-
- /**
- * Obtains the timing resolution for the MIDI file.
- * If the division type is PPQ, the resolution is specified in ticks per beat.
- * For SMTPE timing, the resolution is specified in ticks per frame.
- *
- * @return the number of ticks per beat (PPQ) or per frame (SMPTE)
- * @see #getDivisionType
- * @see Sequence#getResolution()
- */
- public int getResolution() {
- return resolution;
- }
-
-
- /**
- * Obtains the length of the MIDI file, expressed in 8-bit bytes.
- * @return the number of bytes in the file, or UNKNOWN_LENGTH if not known
- * @see #UNKNOWN_LENGTH
- */
- public int getByteLength() {
- return byteLength;
- }
-
- /**
- * Obtains the length of the MIDI file, expressed in microseconds.
- * @return the file's duration in microseconds, or UNKNOWN_LENGTH if not known
- * @see Sequence#getMicrosecondLength()
- * @see #getByteLength
- * @see #UNKNOWN_LENGTH
- */
- public long getMicrosecondLength() {
- return microsecondLength;
- }
-
- /**
- * Obtain an unmodifiable map of properties.
- * The concept of properties is further explained in
- * the {@link MidiFileFormat class description}.
- *
- * @return a <code>Map<String,Object></code> object containing
- * all properties. If no properties are recognized, an empty map is
- * returned.
- *
- * @see #getProperty(String)
- * @since 1.5
- */
- public Map<String,Object> properties() {
- Map<String,Object> ret;
- if (properties == null) {
- ret = new HashMap<String,Object>(0);
- } else {
- ret = (Map<String,Object>) (properties.clone());
- }
- return (Map<String,Object>) Collections.unmodifiableMap(ret);
- }
-
-
- /**
- * Obtain the property value specified by the key.
- * The concept of properties is further explained in
- * the {@link MidiFileFormat class description}.
- *
- * <p>If the specified property is not defined for a
- * particular file format, this method returns
- * <code>null</code>.
- *
- * @param key the key of the desired property
- * @return the value of the property with the specified key,
- * or <code>null</code> if the property does not exist.
- *
- * @see #properties
- * @since 1.5
- */
- public Object getProperty(String key) {
- if (properties == null) {
- return null;
- }
- return properties.get(key);
- }
-
-
- }
-