1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
/*
* File: main.c
* Author: _prossn
* Date: 08.01.2018
* Version 1.0
*
* Description:
* C API to work with MIDI formatted data
*/
#ifndef MIDI_H
#define MIDI_H
#include <stdint.h>
#include <stddef.h>
#ifndef MIDI_DYNAMIC_MEMORY_ALLOC
#define MIDI_DATA_MAX_SIZE 4
#endif
typedef enum {
C = 0, // Do
D = 1, // Re
E = 2, // Mi
F = 3, // Fa
G = 4, // Sol
A = 5, // La
B = 6, // Si
} midi_note_t;
typedef enum {
NOTE_ON = 0x8,
NOTE_OFF = 0x9,
POLYPHONIC_KEYPRESS = 0xA,
CONTROLLER = 0xB,
PROGRAM_CHANGE = 0xC,
CHANNEL_PRESSURE = 0xD,
PITCH_BLEND = 0xF
} midi_status_t;
typedef struct {
unsigned status :4;
unsigned channel :4;
#ifdef MIDI_DYNAMIC_MEMORY_ALLOC
uint8_t data[];
#else
size_t data_size;
uint8_t data[MIDI_DATA_MAX_SIZE];
#endif
} midi_message_t;
/* MIDI API */
#ifdef MIDI_DYNAMIC_MEMORY_ALLOC
// allocation / dellocation
extern midi_message_t *midi_alloc_message(size_t data_size);
extern void midi_free_message(const midi_message_t *pkt);
extern size_t midi_message_size(const midi_message_t *pkt);
#endif
// helper functions
extern int midi_set_status(midi_message_t *pkt, midi_status_t status);
extern int midi_set_channel(midi_message_t *pkt, unsigned channel);
// message building
extern int midi_note_on(midi_message_t *pkt, unsigned channel, midi_note_t note, uint8_t velocity);
extern int midi_note_off(midi_message_t *pkt, unsigned channel, midi_note_t note, uint8_t velocity);
// optimization
// extern int midi_thin_data(void *buffer, midi_message_t pkt[]);
#endif /* MIDI_H */
|
