messages.h

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/*
 * This file is part of nanomidi.
 *
 * Copyright (C) 2018 Adam Heinrich <adam@adamh.cz>
 *
 * Nanomidi 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 3 of the License, or
 * (at your option) any later version.
 *
 * Nanomidi 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 nanomidi.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef NANOMIDI_MESSAGES_H
#define NANOMIDI_MESSAGES_H

#include <stddef.h>
#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

enum midi_type {
        MIDI_TYPE_NOTE_OFF = 0x80,
        MIDI_TYPE_NOTE_ON = 0x90,
        MIDI_TYPE_POLYPHONIC_PRESSURE = 0xa0,
        MIDI_TYPE_CONTROL_CHANGE = 0xb0,
        MIDI_TYPE_PROGRAM_CHANGE = 0xc0,
        MIDI_TYPE_CHANNEL_PRESSURE = 0xd0,
        MIDI_TYPE_PITCH_BEND = 0xe0,

        MIDI_TYPE_TIME_CODE_QUARTER_FRAME = 0xf1,
        MIDI_TYPE_SONG_POSITION = 0xf2,
        MIDI_TYPE_SONG_SELECT = 0xf3,
        MIDI_TYPE_TUNE_REQUEST = 0xf6,

        MIDI_TYPE_TIMING_CLOCK = 0xf8,
        MIDI_TYPE_START = 0xfa,
        MIDI_TYPE_CONTINUE = 0xfb,
        MIDI_TYPE_STOP = 0xfc,
        MIDI_TYPE_ACTIVE_SENSE = 0xfe,
        MIDI_TYPE_SYSTEM_RESET = 0xff,

        MIDI_TYPE_SYSEX = 0xf0,
        MIDI_TYPE_SYSTEM_EXCLUSIVE = MIDI_TYPE_SYSEX,
};

struct midi_message {
        enum midi_type type;
        uint8_t channel;

        union data {
                struct note_on {
                        uint8_t note; 
                        uint8_t velocity; 
                } note_on;

                struct note_off {
                        uint8_t note; 
                        uint8_t velocity; 
                } note_off;

                struct polyphonic_pressure {
                        uint8_t note; 
                        uint8_t pressure; 
                } polyphonic_pressure;

                struct control_change {
                        uint8_t controller; 
                        uint8_t value; 
                } control_change;

                struct program_change {
                        uint8_t program; 
                } program_change;

                struct channel_pressure {
                        uint8_t pressure; 
                } channel_pressure;

                struct pitch_bend {
                        uint16_t value; 
                } pitch_bend;

                struct time_code_quarter_frame {
                        uint8_t value; /*< Time code value (0-127) */
                } time_code_quarter_frame;

                struct song_position {
                        uint16_t position; 
                } song_position;

                struct song_select {
                        uint8_t song; 
                } song_select;

                struct sysex {
                        const void *data; 
                        size_t length; 
                } sysex;
        } data; 
};

#ifdef __cplusplus
}
#endif

#endif /* NANOMIDI_MESSAGES_H */