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* <td>{@link java.lang.String String} * <td>name of the author of this file * </tr> * <tr> * <td>"title" * <td>{@link java.lang.String String} * <td>title of this file * </tr> * <tr> * <td>"copyright" * <td>{@link java.lang.String String} * <td>copyright message * </tr> * <tr> * <td>"date" * <td>{@link java.util.Date Date} * <td>date of the recording or release * </tr> * <tr> * <td>"comment" * <td>{@link java.lang.String String} * <td>an arbitrary text * </tr> * </table> * * @see MidiSystem#getMidiFileFormat(java.io.File) * @see Sequencer#setSequence(java.io.InputStream stream) * * @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. * * @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 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> 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> 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. * * @param key the key of the desired property * @return the value of the property with the specified key, * or <code>null 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); } }

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Java example source code file (MidiFileFormat.java)

This example Java source code file (MidiFileFormat.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

hashmap, map, midifileformat, object, unknown_length, util

The MidiFileFormat.java Java example source code

/*
 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

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 object encapsulates a MIDI file's
 * type, as well as its length and timing information.
 *
 * <p>A MidiFileFormat object can
 * include a set of properties. A property is a pair of key and value:
 * the key is of type <code>String, 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>
    <caption>MIDI File Format Properties
 *  <tr>
 *   <th>Property key
 *   <th>Value type
 *   <th>Description
 *  </tr>
 *  <tr>
 *   <td>"author"
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