return if the given message is a MIDI meta tempo message - Java javax.sound.midi

Java examples for javax.sound.midi:MidiMessage

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Description

return if the given message is a MIDI meta tempo message

Demo Code

/*//from  ww  w .  j  ava2s  .  c om
 * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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.
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//package com.java2s;

import javax.sound.midi.MetaMessage;

import javax.sound.midi.MidiMessage;

public class Main {
    public static final int META_TEMPO_TYPE = 0x51;

    /** return if the given message is a meta tempo message */
    public static boolean isMetaTempo(MidiMessage midiMsg) {
        // first check if it is a META message at all
        if (midiMsg.getLength() != 6
                || midiMsg.getStatus() != MetaMessage.META) {
            return false;
        }
        // now get message and check for tempo
        byte[] msg = midiMsg.getMessage();
        // meta type must be 0x51, and data length must be 3
        return ((msg[1] & 0xFF) == META_TEMPO_TYPE) && (msg[2] == 3);
    }
}

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