src/share/classes/javax/sound/midi/MetaMessage.java
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*** 1,7 ****
/*
! * 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
--- 1,7 ----
/*
! * Copyright (c) 1999, 2014, 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
*** 23,109 ****
* questions.
*/
package javax.sound.midi;
-
/**
! * A <code>MetaMessage</code> is a <code>{@link MidiMessage}</code> that is not meaningful to synthesizers, but
! * that can be stored in a MIDI file and interpreted by a sequencer program.
! * (See the discussion in the <code>MidiMessage</code>
! * class description.) The Standard MIDI Files specification defines
! * various types of meta-events, such as sequence number, lyric, cue point,
! * and set tempo. There are also meta-events
! * for such information as lyrics, copyrights, tempo indications, time and key
! * signatures, markers, etc. For more information, see the Standard MIDI Files 1.0
! * specification, which is part of the Complete MIDI 1.0 Detailed Specification
! * published by the MIDI Manufacturer's Association
* (<a href = http://www.midi.org>http://www.midi.org</a>).
- *
* <p>
! * When data is being transported using MIDI wire protocol,
! * a <code>{@link ShortMessage}</code> with the status value <code>0xFF</code> represents
! * a system reset message. In MIDI files, this same status value denotes a <code>MetaMessage</code>.
! * The types of meta-message are distinguished from each other by the first byte
! * that follows the status byte <code>0xFF</code>. The subsequent bytes are data
! * bytes. As with system exclusive messages, there are an arbitrary number of
! * data bytes, depending on the type of <code>MetaMessage</code>.
! *
! * @see MetaEventListener
*
* @author David Rivas
* @author Kara Kytle
*/
-
public class MetaMessage extends MidiMessage {
-
- // Status byte defines
-
/**
! * Status byte for <code>MetaMessage</code> (0xFF, or 255), which is used
! * in MIDI files. It has the same value as SYSTEM_RESET, which
! * is used in the real-time "MIDI wire" protocol.
* @see MidiMessage#getStatus
*/
public static final int META = 0xFF; // 255
- // Instance variables
-
/**
! * The length of the actual message in the data array.
! * This is used to determine how many bytes of the data array
! * is the message, and how many are the status byte, the
! * type byte, and the variable-length-int describing the
! * length of the message.
*/
private int dataLength = 0;
-
/**
! * Constructs a new <code>MetaMessage</code>. The contents of
! * the message are not set here; use
! * {@link #setMessage(int, byte[], int) setMessage}
! * to set them subsequently.
*/
public MetaMessage() {
// Default meta message data: just the META status byte value
this(new byte[]{(byte) META, 0});
}
/**
! * Constructs a new {@code MetaMessage} and sets the message parameters.
! * The contents of the message can be changed by using
! * the {@code setMessage} method.
*
* @param type meta-message type (must be less than 128)
* @param data the data bytes in the MIDI message
! * @param length an amount of bytes in the {@code data} byte array;
! * it should be non-negative and less than or equal to
* {@code data.length}
! * @throws InvalidMidiDataException if the parameter values do not specify
! * a valid MIDI meta message
* @see #setMessage(int, byte[], int)
* @see #getType()
* @see #getData()
* @since 1.7
*/
--- 23,98 ----
* questions.
*/
package javax.sound.midi;
/**
! * A {@code MetaMessage} is a {@link MidiMessage} that is not meaningful to
! * synthesizers, but that can be stored in a MIDI file and interpreted by a
! * sequencer program. (See the discussion in the {@code MidiMessage} class
! * description.) The Standard MIDI Files specification defines various types of
! * meta-events, such as sequence number, lyric, cue point, and set tempo. There
! * are also meta-events for such information as lyrics, copyrights, tempo
! * indications, time and key signatures, markers, etc. For more information, see
! * the Standard MIDI Files 1.0 specification, which is part of the Complete MIDI
! * 1.0 Detailed Specification published by the MIDI Manufacturer's Association
* (<a href = http://www.midi.org>http://www.midi.org</a>).
* <p>
! * When data is being transported using MIDI wire protocol, a
! * {@link ShortMessage} with the status value {@code 0xFF} represents a system
! * reset message. In MIDI files, this same status value denotes a
! * {@code MetaMessage}. The types of meta-message are distinguished from each
! * other by the first byte that follows the status byte {@code 0xFF}. The
! * subsequent bytes are data bytes. As with system exclusive messages, there are
! * an arbitrary number of data bytes, depending on the type of
! * {@code MetaMessage}.
*
* @author David Rivas
* @author Kara Kytle
+ * @see MetaEventListener
*/
public class MetaMessage extends MidiMessage {
/**
! * Status byte for {@code MetaMessage} (0xFF, or 255), which is used in MIDI
! * files. It has the same value as SYSTEM_RESET, which is used in the
! * real-time "MIDI wire" protocol.
! *
* @see MidiMessage#getStatus
*/
public static final int META = 0xFF; // 255
/**
! * The length of the actual message in the data array. This is used to
! * determine how many bytes of the data array is the message, and how many
! * are the status byte, the type byte, and the variable-length-int
! * describing the length of the message.
*/
private int dataLength = 0;
/**
! * Constructs a new {@code MetaMessage}. The contents of the message are not
! * set here; use {@link #setMessage(int, byte[], int) setMessage} to set
! * them subsequently.
*/
public MetaMessage() {
// Default meta message data: just the META status byte value
this(new byte[]{(byte) META, 0});
}
/**
! * Constructs a new {@code MetaMessage} and sets the message parameters. The
! * contents of the message can be changed by using the {@code setMessage}
! * method.
*
* @param type meta-message type (must be less than 128)
* @param data the data bytes in the MIDI message
! * @param length an amount of bytes in the {@code data} byte array; it
! * should be non-negative and less than or equal to
* {@code data.length}
! * @throws InvalidMidiDataException if the parameter values do not specify a
! * valid MIDI meta message
* @see #setMessage(int, byte[], int)
* @see #getType()
* @see #getData()
* @since 1.7
*/
*** 111,126 ****
throws InvalidMidiDataException {
super(null);
setMessage(type, data, length); // can throw InvalidMidiDataException
}
-
/**
! * Constructs a new <code>MetaMessage</code>.
! * @param data an array of bytes containing the complete message.
! * The message data may be changed using the <code>setMessage</code>
! * method.
* @see #setMessage
*/
protected MetaMessage(byte[] data) {
super(data);
//$$fb 2001-10-06: need to calculate dataLength. Fix for bug #4511796
--- 100,114 ----
throws InvalidMidiDataException {
super(null);
setMessage(type, data, length); // can throw InvalidMidiDataException
}
/**
! * Constructs a new {@code MetaMessage}.
! *
! * @param data an array of bytes containing the complete message. The
! * message data may be changed using the {@code setMessage} method.
* @see #setMessage
*/
protected MetaMessage(byte[] data) {
super(data);
//$$fb 2001-10-06: need to calculate dataLength. Fix for bug #4511796
*** 131,158 ****
dataLength--; pos++;
}
}
}
-
/**
! * Sets the message parameters for a <code>MetaMessage</code>.
! * Since only one status byte value, <code>0xFF</code>, is allowed for meta-messages,
! * it does not need to be specified here. Calls to <code>{@link MidiMessage#getStatus getStatus}</code> return
! * <code>0xFF</code> for all meta-messages.
* <p>
! * The <code>type</code> argument should be a valid value for the byte that
! * follows the status byte in the <code>MetaMessage</code>. The <code>data</code> argument
! * should contain all the subsequent bytes of the <code>MetaMessage</code>. In other words,
! * the byte that specifies the type of <code>MetaMessage</code> is not considered a data byte.
*
* @param type meta-message type (must be less than 128)
* @param data the data bytes in the MIDI message
! * @param length the number of bytes in the <code>data</code>
! * byte array
! * @throws InvalidMidiDataException if the
! * parameter values do not specify a valid MIDI meta message
*/
public void setMessage(int type, byte[] data, int length) throws InvalidMidiDataException {
if (type >= 128 || type < 0) {
throw new InvalidMidiDataException("Invalid meta event with type " + type);
--- 119,146 ----
dataLength--; pos++;
}
}
}
/**
! * Sets the message parameters for a {@code MetaMessage}. Since only one
! * status byte value, {@code 0xFF}, is allowed for meta-messages, it does
! * not need to be specified here. Calls to
! * {@link MidiMessage#getStatus getStatus} return {@code 0xFF} for all
! * meta-messages.
* <p>
! * The {@code type} argument should be a valid value for the byte that
! * follows the status byte in the {@code MetaMessage}. The {@code data}
! * argument should contain all the subsequent bytes of the
! * {@code MetaMessage}. In other words, the byte that specifies the type of
! * {@code MetaMessage} is not considered a data byte.
*
* @param type meta-message type (must be less than 128)
* @param data the data bytes in the MIDI message
! * @param length the number of bytes in the {@code data} byte array
! * @throws InvalidMidiDataException if the parameter values do not specify a
! * valid MIDI meta message
*/
public void setMessage(int type, byte[] data, int length) throws InvalidMidiDataException {
if (type >= 128 || type < 0) {
throw new InvalidMidiDataException("Invalid meta event with type " + type);
*** 170,213 ****
if (length > 0) {
System.arraycopy(data, 0, this.data, this.length - this.dataLength, this.dataLength);
}
}
-
/**
! * Obtains the type of the <code>MetaMessage</code>.
! * @return an integer representing the <code>MetaMessage</code> type
*/
public int getType() {
if (length>=2) {
return data[1] & 0xFF;
}
return 0;
}
-
-
/**
! * Obtains a copy of the data for the meta message. The returned
! * array of bytes does not include the status byte or the message
! * length data. The length of the data for the meta message is
! * the length of the array. Note that the length of the entire
! * message includes the status byte and the meta message type
! * byte, and therefore may be longer than the returned array.
! * @return array containing the meta message data.
* @see MidiMessage#getLength
*/
public byte[] getData() {
byte[] returnedArray = new byte[dataLength];
System.arraycopy(data, (length - dataLength), returnedArray, 0, dataLength);
return returnedArray;
}
-
/**
! * Creates a new object of the same class and with the same contents
! * as this object.
* @return a clone of this instance
*/
public Object clone() {
byte[] newData = new byte[length];
System.arraycopy(data, 0, newData, 0, newData.length);
--- 158,200 ----
if (length > 0) {
System.arraycopy(data, 0, this.data, this.length - this.dataLength, this.dataLength);
}
}
/**
! * Obtains the type of the {@code MetaMessage}.
! *
! * @return an integer representing the {@code MetaMessage} type
*/
public int getType() {
if (length>=2) {
return data[1] & 0xFF;
}
return 0;
}
/**
! * Obtains a copy of the data for the meta message. The returned array of
! * bytes does not include the status byte or the message length data. The
! * length of the data for the meta message is the length of the array. Note
! * that the length of the entire message includes the status byte and the
! * meta message type byte, and therefore may be longer than the returned
! * array.
! *
! * @return array containing the meta message data
* @see MidiMessage#getLength
*/
public byte[] getData() {
byte[] returnedArray = new byte[dataLength];
System.arraycopy(data, (length - dataLength), returnedArray, 0, dataLength);
return returnedArray;
}
/**
! * Creates a new object of the same class and with the same contents as this
! * object.
! *
* @return a clone of this instance
*/
public Object clone() {
byte[] newData = new byte[length];
System.arraycopy(data, 0, newData, 0, newData.length);
*** 238,244 ****
data[off++]=(byte) (((value & (mask << shift)) >> shift) | 0x80);
shift-=7;
}
data[off] = (byte) (value & mask);
}
-
}
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