Check if the given message is a real "Note On" MIDI message. - Java javax.sound.midi

Java examples for javax.sound.midi:MidiMessage

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Description

Check if the given message is a real "Note On" MIDI message.

Demo Code

/*/*from  w w w  .j  av  a 2  s  . c  o m*/
 *  Copyright 2011 Harald Postner <Harald at H-Postner.de>.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *  under the License.
 */
//package com.java2s;

import javax.sound.midi.*;

public class Main {
    /**
     * Check if the given message is a real "Note On" message. Note: messages with
     * a command of "NOTE_ON" but velocity of 0 are often used in place of
     * note-off messages, such messages are not considered as real note-on
     * message.
     *
     * @param message any MIDI message or null.
     * @return true if the given message denotes the start of a note.
     */
    public static boolean isNoteOnMessage(MidiMessage message) {
        if (null == message) {
            return false;
        }
        if (message instanceof ShortMessage) {
            ShortMessage shortMessage = (ShortMessage) message;
            if (shortMessage.getCommand() == ShortMessage.NOTE_ON) {
                if (shortMessage.getData2() != 0) {
                    return true; // Note on and velocity is not 0
                }
            }

        }
        return false; //all other cases
    }
}

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