EventQueue.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 EVENT_QUEUE_H
#define EVENT_QUEUE_H
 
#include <core/Object.h>
#include <core/Basics/Note.h>
#include <cassert>
#include <mutex>

#define MAX_EVENTS 1024
 
namespace H2Core
{
        
enum EventType {
        EVENT_NONE,
        EVENT_STATE,
        EVENT_PLAYING_PATTERNS_CHANGED,
        EVENT_NEXT_PATTERNS_CHANGED,
        EVENT_PATTERN_MODIFIED,
        EVENT_SELECTED_PATTERN_CHANGED,
        EVENT_SELECTED_INSTRUMENT_CHANGED,
        EVENT_INSTRUMENT_PARAMETERS_CHANGED,
        EVENT_MIDI_ACTIVITY,
        EVENT_XRUN,
        EVENT_NOTEON,
        EVENT_ERROR,
        EVENT_METRONOME,
        EVENT_PROGRESS,
        EVENT_JACK_SESSION,
        EVENT_PLAYLIST_LOADSONG,
        EVENT_UNDO_REDO,
        EVENT_SONG_MODIFIED,
        EVENT_TEMPO_CHANGED,
        EVENT_UPDATE_PREFERENCES,
        EVENT_UPDATE_SONG,
        EVENT_QUIT,
 
        EVENT_TIMELINE_ACTIVATION,
        EVENT_TIMELINE_UPDATE,
        EVENT_JACK_TRANSPORT_ACTIVATION,
        EVENT_JACK_TIMEBASE_STATE_CHANGED,
        EVENT_SONG_MODE_ACTIVATION,
        EVENT_STACKED_MODE_ACTIVATION,
        EVENT_LOOP_MODE_ACTIVATION,
        EVENT_ACTION_MODE_CHANGE,
        EVENT_GRID_CELL_TOGGLED,
        EVENT_COLUMN_CHANGED,
        EVENT_DRUMKIT_LOADED,
        EVENT_PATTERN_EDITOR_LOCKED,
        EVENT_RELOCATION,
        EVENT_BBT_CHANGED,
        EVENT_SONG_SIZE_CHANGED,
        EVENT_DRIVER_CHANGED,
        EVENT_PLAYBACK_TRACK_CHANGED,
        EVENT_SOUND_LIBRARY_CHANGED,
        EVENT_NEXT_SHOT,
        EVENT_MIDI_MAP_CHANGED
};

class Event
{
public:
        EventType type;
        int value;
};

class EventQueue : public H2Core::Object<EventQueue>
{
        H2_OBJECT(EventQueue)
public:
        static void create_instance();
        static EventQueue* get_instance() { assert(__instance); return __instance; }
        ~EventQueue();

        void push_event( const EventType type, const int nValue );
        Event pop_event();
 
        struct AddMidiNoteVector {
                int m_column;       //position
                int m_row;          //instrument row
                int m_pattern;      // pattern number
                int m_length;
                float f_velocity;
                float f_pan;
                Note::Key nk_noteKeyVal;
                Note::Octave no_octaveKeyVal;
                bool b_isMidi;
                bool b_isInstrumentMode;
        };
        std::vector<AddMidiNoteVector> m_addMidiNoteVector;
 
        bool getSilent() const;
        void setSilent( bool bSilent );
 
private:
        EventQueue();
        static EventQueue *__instance;

        volatile unsigned int __read_index;
        volatile unsigned int __write_index;
        Event __events_buffer[ MAX_EVENTS ];

        std::mutex m_mutex;

        bool m_bSilent;
};
 
inline bool EventQueue::getSilent() const {
        return m_bSilent;
}
inline void EventQueue::setSilent( bool bSilent ) {
        m_bSilent = bSilent;
}
 
};
 
#endif