MIDIMessage.hxx

Go to the documentation of this file.

/*
 * Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
 * UNIVERSITAT POMPEU FABRA
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * MIDIFileReader C++ classes
 * This code is part of the CLAM library, but also usable stand-alone.
 * Maarten de Boer <mdeboer@iua.upf.es>
 *
 */
#ifndef __MIDIMessage__
#define __MIDIMessage__

#include "MIDIDataTypes.hxx"
#include <iostream>

namespace MIDI
{

        class Message
        /* an ordinary MIDI message contains between 2 and 4 bytes. reserve
        ** space for the maximum, 4. */
        {
        friend class Event;
        public:
                Message()
                {
                        mData.mStatus = 0;
                        mData.mData1 = 0;
                        mData.mData2 = 0;
                        mData.mData3 = 0;
                }

                Message(Byte status,Byte data1,Byte data2 = 0,Byte data3 = 0)
                {
                        mData.mStatus = status;
                        mData.mData1 = data1;
                        mData.mData2 = data2;
                        mData.mData3 = data3;
                }

                Byte operator [] (int i) const { return mVal[i]; }

                bool operator== (Message message) const { 
                        return (( mData.mStatus == message[0] ) && ( mData.mData1 == message[1] ) && ( mData.mData2 == message[2] ) && ( mData.mData3 == message[3] ));
                };
        
                bool operator!= (Message message) const { 
                        return ( ( message[0] != mData.mStatus) || ( message[1] != mData.mData1 ) || ( message[2] != mData.mData2 ) || ( message[3] != mData.mData3 ) );
                };

                void Update(Byte status = 0,Byte data1 = 0,Byte data2 = 0,Byte data3 = 0)
                {
                        if(status) {mData.mStatus = status;}
                        if(data1) {mData.mData1 = data1;}
                        if(data2) {mData.mData2 = data2;}
                        if(data3) {mData.mData3 = data3;}
                }
                
        private:
                union
                {
                        struct
                        {
                                Byte mStatus;
                                Byte mData1;
                                Byte mData2;
                                Byte mData3;
                        } mData;

                        Byte mVal[4];
                };
        };

        std::ostream& operator<< (std::ostream &os, const Message& m);
}
#endif