mod-tools/midi_data.h at main · moefh/mod-tools · GitHub

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#ifndef MIDI_DATA_H_FILE
#define MIDI_DATA_H_FILE

#include <stdint.h>

enum MIDI_EVENT_TYPE {
    MIDI_EVENT_TYPE_MIDI,
    MIDI_EVENT_TYPE_SYSEX,
    MIDI_EVENT_TYPE_META,
};

enum MIDI_EVENT_META_TYPE {
    MIDI_EVENT_TYPE_META_SHORT,
    MIDI_EVENT_TYPE_META_LONG,
};

struct MIDI_EVENT_MIDI {
    uint8_t status;
    uint8_t data1;
    uint8_t data2;
};

struct MIDI_EVENT_SYSEX {
    uint8_t sysex_type;    // 0xf0 or 0xf7
    uint32_t data_len;
    uint8_t *data;
};

struct MIDI_EVENT_META_SHORT {
    uint8_t data[8];
};

struct MIDI_EVENT_META_LONG {
    uint8_t *data;
};

struct MIDI_EVENT_META {
    uint8_t meta_type;
    uint32_t data_len;
    enum MIDI_EVENT_META_TYPE type;
    union {
        struct MIDI_EVENT_META_SHORT short_data;
        struct MIDI_EVENT_META_LONG long_data;
    };
};

struct MIDI_EVENT {
    uint32_t delta_time;
    enum MIDI_EVENT_TYPE type;
    union {
        struct MIDI_EVENT_MIDI midi;
        struct MIDI_EVENT_SYSEX sysex;
        struct MIDI_EVENT_META meta;
    };
};

struct MIDI_TRACK {
    int n_events;
    int alloc_events;
    struct MIDI_EVENT *events;
};

struct MIDI_DATA {
    uint8_t format;
    uint16_t ticks_per_beat;
    int n_tracks;
    struct MIDI_TRACK tracks[];
};

struct MIDI_DATA *midi_new(uint8_t format, uint16_t ticks_per_beat, uint16_t n_tracks);
void midi_free(struct MIDI_DATA *midi);

struct MIDI_EVENT_MIDI *midi_add_midi_event(struct MIDI_DATA *midi, uint16_t track_num, uint32_t delta_time);
struct MIDI_EVENT_SYSEX *midi_add_sysex_event(struct MIDI_DATA *midi, uint16_t track_num, uint32_t delta_time);
struct MIDI_EVENT_META *midi_add_meta_event(struct MIDI_DATA *midi, uint16_t track_num, uint32_t delta_time);

#endif /* MIDI_DATA_H_FILE */