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
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
#include "midi.h"
#include <stdint.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef MIDI_DYNAMIC_MEMORY_ALLOC
midi_message_t *midi_alloc_message(size_t data_size)
{
return (midi_message_t *) malloc(sizeof(midi_message_t) + data_size);
}
void midi_free_message(midi_message_t *pkt)
{
if (pkt == NULL) {
return;
}
free(pkt);
pkt = NULL;
}
size_t midi_message_size(const midi_message_t *pkt)
{
if (pkt == NULL) {
return 0;
}
switch (pkt->status) {
case NOTE_ON: return sizeof(midi_message_t) + 2;
case NOTE_OFF: return sizeof(midi_message_t) + 1;
default: return sizeof(midi_message_t);
}
}
#endif
int midi_set_status(midi_message_t *pkt, midi_status_t status)
{
if (pkt == NULL) {
return -1;
}
pkt->status = status & 0x0F;
return 0;
}
int midi_set_channel(midi_message_t *pkt, unsigned channel)
{
if (pkt == NULL) {
return -1;
}
pkt->channel = channel & 0x0F;
return 0;
}
int midi_note_on(midi_message_t *pkt, unsigned channel, midi_note_t note, uint8_t velocity)
{
if (pkt == NULL) {
return -1;
}
#ifdef MIDI_DYNAMIC_MEMORY_ALLOC
if (pkt->data == NULL) {
return -2;
}
#endif
midi_set_status(pkt, NOTE_ON);
midi_set_channel(pkt, channel);
pkt->data[0] = note;
pkt->data[1] = velocity;
#ifndef MIDI_DYNAMIC_MEMORY_ALLOC
pkt->data_size = 2;
#endif
return 0;
}
int midi_note_off(midi_message_t *pkt, unsigned channel, midi_note_t note, uint8_t velocity)
{
if (pkt == NULL) {
return -1;
}
#ifdef MIDI_DYNAMIC_MEMORY_ALLOC
if (pkt->data == NULL) {
return -2;
}
#endif
midi_set_status(pkt, NOTE_OFF);
midi_set_channel(pkt, channel);
pkt->data[0] = note;
pkt->data[1] = velocity;
#ifndef MIDI_DYNAMIC_MEMORY_ALLOC
pkt->data_size = 2;
#endif
return 0;
}
|
