SMFEvent.h

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/*
 * Hydrogen
 * Copyright(c) 2002-2008 by Alex >Comix< Cominu [comix@users.sourceforge.net]
 * Copyright(c) 2008-2025 The hydrogen development team [hydrogen-devel@lists.sourceforge.net]
 *
 * http://www.hydrogen-music.org
 *
 * 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, see https://www.gnu.org/licenses
 *
 */
 
#ifndef SMF_EVENT_H
#define SMF_EVENT_H
 
#include <QByteArray>
#include <QString>
#include <core/Object.h>
 
namespace H2Core
{

class SMFBuffer : public H2Core::Object<SMFBuffer>
{
        H2_OBJECT(SMFBuffer)
public:
        QByteArray getBuffer() {
                return m_buffer;
        }
 
        void writeByte( char nByte );
        void writeWord( int nVal );
        void writeDWord( long nVal );
        void writeString( const QString& sMsg );
        void writeVarLen( long nVal );
 
        QByteArray m_buffer;
 
        SMFBuffer();
};
 
 
 
enum SMFEventType {
        NOTE_OFF = 128,
        NOTE_ON = 144
};
 
 
 
enum SMFMetaEventType {
        SEQUENCE_NUMBER = 0,
        TEXT_EVENT,
        COPYRIGHT_NOTICE,
        TRACK_NAME,
        INSTRUMENT_NAME,
        LYRIC,
        MARKER,
        CUE_POINT,
        END_OF_TRACK = 0x2f,
        SET_TEMPO = 0x51,
        TIME_SIGNATURE = 0x58,
        KEY_SIGNATURE
};
 

class SMFBase
{
public:
        virtual ~SMFBase() {}
        virtual QByteArray getBuffer() const = 0;
        virtual QString toQString() const = 0;
};
 
 

class SMFEvent : public SMFBase, public H2Core::Object<SMFEvent>
{
        H2_OBJECT(SMFEvent)
public:
        SMFEvent(unsigned nTicks );
        virtual ~SMFEvent();
 
        virtual QString toQString() const override;
        int m_nTicks;
        int m_nDeltaTime;
};
 
 

class SMFTrackNameMetaEvent : public SMFEvent, public H2Core::Object<SMFTrackNameMetaEvent>
{
        H2_OBJECT(SMFTrackNameMetaEvent)
public:
        SMFTrackNameMetaEvent( const QString& sTrackName, unsigned nDeltaTime );
        virtual QByteArray getBuffer() const override;
 
private:
        QString m_sTrackName;
 
};
 
 

class SMFSetTempoMetaEvent : public SMFEvent, public H2Core::Object<SMFSetTempoMetaEvent>
{
        H2_OBJECT(SMFSetTempoMetaEvent)
public:
        SMFSetTempoMetaEvent( float fBPM, unsigned nDeltaTime );
        virtual QByteArray getBuffer() const override;
 
private:
        unsigned m_fBPM;
 
};
 
 

class SMFCopyRightNoticeMetaEvent : public SMFEvent, public H2Core::Object<SMFCopyRightNoticeMetaEvent>
{
        H2_OBJECT(SMFCopyRightNoticeMetaEvent)
public:
        SMFCopyRightNoticeMetaEvent( const QString& sAuthor, unsigned nDeltaTime );
        virtual QByteArray getBuffer() const override;
 
private:
        QString m_sAuthor;
 
};
 
 

class SMFTimeSignatureMetaEvent : public SMFEvent, public H2Core::Object<SMFTimeSignatureMetaEvent>
{
        H2_OBJECT(SMFTimeSignatureMetaEvent)
public:
        SMFTimeSignatureMetaEvent( unsigned nBeats, unsigned nNote , unsigned nMTPMC , unsigned nTSNP24 , unsigned nTicks );
        virtual QByteArray getBuffer() const override;
        // MTPMC = MIDI ticks per metronome click
        // TSNP24 = Thirty Second Notes Per 24 MIDI Ticks.
private:
        unsigned m_nBeats, m_nNote, m_nMTPMC , m_nTSNP24 , m_nTicks;
};
 
 

class SMFNoteOnEvent : public SMFEvent, public H2Core::Object<SMFNoteOnEvent>
{
        H2_OBJECT(SMFNoteOnEvent)
public:
        SMFNoteOnEvent( unsigned nTicks, int nChannel, int nPitch, int nVelocity );
 
        virtual QByteArray getBuffer() const override;
 
protected:
        unsigned m_nChannel;
        unsigned m_nPitch;
        unsigned m_nVelocity;
};
 
 

class SMFNoteOffEvent : public SMFEvent, public H2Core::Object<SMFNoteOffEvent>
{
        H2_OBJECT(SMFNoteOffEvent)
public:
        SMFNoteOffEvent(  unsigned nTicks, int nChannel, int nPitch, int nVelocity );
 
        virtual QByteArray getBuffer() const override;
 
protected:
        unsigned m_nChannel;
        unsigned m_nPitch;
        unsigned m_nVelocity;
 
};
 
};
 
#endif