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
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
|
/* Copyright 2016 Jack Humbert
*
* 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 <http://www.gnu.org/licenses/>.
*/
#include "process_midi.h"
#ifdef MIDI_ENABLE
# include <LUFA/Drivers/USB/USB.h>
# include "midi.h"
# include "qmk_midi.h"
# ifdef MIDI_BASIC
void process_midi_basic_noteon(uint8_t note) {
midi_send_noteon(&midi_device, 0, note, 127);
}
void process_midi_basic_noteoff(uint8_t note) {
midi_send_noteoff(&midi_device, 0, note, 0);
}
void process_midi_all_notes_off(void) {
midi_send_cc(&midi_device, 0, 0x7B, 0);
}
# endif // MIDI_BASIC
# ifdef MIDI_ADVANCED
# include "timer.h"
static uint8_t tone_status[2][MIDI_TONE_COUNT];
static uint8_t midi_modulation;
static int8_t midi_modulation_step;
static uint16_t midi_modulation_timer;
midi_config_t midi_config;
inline uint8_t compute_velocity(uint8_t setting) {
return setting * (128 / (MIDI_VELOCITY_MAX - MIDI_VELOCITY_MIN));
}
void midi_init(void) {
midi_config.octave = QK_MIDI_OCTAVE_2 - MIDI_OCTAVE_MIN;
midi_config.transpose = 0;
midi_config.velocity = 127;
midi_config.channel = 0;
midi_config.modulation_interval = 8;
for (uint8_t i = 0; i < MIDI_TONE_COUNT; i++) {
tone_status[0][i] = MIDI_INVALID_NOTE;
tone_status[1][i] = 0;
}
midi_modulation = 0;
midi_modulation_step = 0;
midi_modulation_timer = 0;
}
uint8_t midi_compute_note(uint16_t keycode) {
return 12 * midi_config.octave + (keycode - MIDI_TONE_MIN) + midi_config.transpose;
}
bool process_midi(uint16_t keycode, keyrecord_t *record) {
switch (keycode) {
case MIDI_TONE_MIN ... MIDI_TONE_MAX: {
uint8_t channel = midi_config.channel;
uint8_t tone = keycode - MIDI_TONE_MIN;
uint8_t velocity = midi_config.velocity;
if (record->event.pressed) {
uint8_t note = midi_compute_note(keycode);
midi_send_noteon(&midi_device, channel, note, velocity);
dprintf("midi noteon channel:%d note:%d velocity:%d\n", channel, note, velocity);
tone_status[1][tone] += 1;
if (tone_status[0][tone] == MIDI_INVALID_NOTE) {
tone_status[0][tone] = note;
}
} else {
uint8_t note = tone_status[0][tone];
tone_status[1][tone] -= 1;
if (tone_status[1][tone] == 0) {
midi_send_noteoff(&midi_device, channel, note, velocity);
dprintf("midi noteoff channel:%d note:%d velocity:%d\n", channel, note, velocity);
tone_status[0][tone] = MIDI_INVALID_NOTE;
}
}
return false;
}
case MIDI_OCTAVE_MIN ... MIDI_OCTAVE_MAX:
if (record->event.pressed) {
midi_config.octave = keycode - MIDI_OCTAVE_MIN;
dprintf("midi octave %d\n", midi_config.octave);
}
return false;
case QK_MIDI_OCTAVE_DOWN:
if (record->event.pressed && midi_config.octave > 0) {
midi_config.octave--;
dprintf("midi octave %d\n", midi_config.octave);
}
return false;
case QK_MIDI_OCTAVE_UP:
if (record->event.pressed && midi_config.octave < (MIDI_OCTAVE_MAX - MIDI_OCTAVE_MIN)) {
midi_config.octave++;
dprintf("midi octave %d\n", midi_config.octave);
}
return false;
case MIDI_TRANSPOSE_MIN ... MIDI_TRANSPOSE_MAX:
if (record->event.pressed) {
midi_config.transpose = keycode - QK_MIDI_TRANSPOSE_0;
dprintf("midi transpose %d\n", midi_config.transpose);
}
return false;
case QK_MIDI_TRANSPOSE_DOWN:
if (record->event.pressed && midi_config.transpose > (MIDI_TRANSPOSE_MIN - QK_MIDI_TRANSPOSE_0)) {
midi_config.transpose--;
dprintf("midi transpose %d\n", midi_config.transpose);
}
return false;
case QK_MIDI_TRANSPOSE_UP:
if (record->event.pressed && midi_config.transpose < (MIDI_TRANSPOSE_MAX - QK_MIDI_TRANSPOSE_0)) {
const bool positive = midi_config.transpose > 0;
midi_config.transpose++;
if (positive && midi_config.transpose < 0) midi_config.transpose--;
dprintf("midi transpose %d\n", midi_config.transpose);
}
return false;
case MIDI_VELOCITY_MIN ... MIDI_VELOCITY_MAX:
if (record->event.pressed) {
midi_config.velocity = compute_velocity(keycode - MIDI_VELOCITY_MIN);
dprintf("midi velocity %d\n", midi_config.velocity);
}
return false;
case QK_MIDI_VELOCITY_DOWN:
if (record->event.pressed && midi_config.velocity > 0) {
if (midi_config.velocity == 127) {
midi_config.velocity -= 10;
} else if (midi_config.velocity > 12) {
midi_config.velocity -= 13;
} else {
midi_config.velocity = 0;
}
dprintf("midi velocity %d\n", midi_config.velocity);
}
return false;
case QK_MIDI_VELOCITY_UP:
if (record->event.pressed && midi_config.velocity < 127) {
if (midi_config.velocity < 115) {
midi_config.velocity += 13;
} else {
midi_config.velocity = 127;
}
dprintf("midi velocity %d\n", midi_config.velocity);
}
return false;
case MIDI_CHANNEL_MIN ... MIDI_CHANNEL_MAX:
if (record->event.pressed) {
midi_config.channel = keycode - MIDI_CHANNEL_MIN;
dprintf("midi channel %d\n", midi_config.channel);
}
return false;
case QK_MIDI_CHANNEL_DOWN:
if (record->event.pressed) {
midi_config.channel--;
dprintf("midi channel %d\n", midi_config.channel);
}
return false;
case QK_MIDI_CHANNEL_UP:
if (record->event.pressed) {
midi_config.channel++;
dprintf("midi channel %d\n", midi_config.channel);
}
return false;
case QK_MIDI_ALL_NOTES_OFF:
if (record->event.pressed) {
midi_send_cc(&midi_device, midi_config.channel, 0x7B, 0);
dprintf("midi all notes off\n");
}
return false;
case QK_MIDI_SUSTAIN:
midi_send_cc(&midi_device, midi_config.channel, 0x40, record->event.pressed ? 127 : 0);
dprintf("midi sustain %d\n", record->event.pressed);
return false;
case QK_MIDI_PORTAMENTO:
midi_send_cc(&midi_device, midi_config.channel, 0x41, record->event.pressed ? 127 : 0);
dprintf("midi portamento %d\n", record->event.pressed);
return false;
case QK_MIDI_SOSTENUTO:
midi_send_cc(&midi_device, midi_config.channel, 0x42, record->event.pressed ? 127 : 0);
dprintf("midi sostenuto %d\n", record->event.pressed);
return false;
case QK_MIDI_SOFT:
midi_send_cc(&midi_device, midi_config.channel, 0x43, record->event.pressed ? 127 : 0);
dprintf("midi soft %d\n", record->event.pressed);
return false;
case QK_MIDI_LEGATO:
midi_send_cc(&midi_device, midi_config.channel, 0x44, record->event.pressed ? 127 : 0);
dprintf("midi legato %d\n", record->event.pressed);
return false;
case QK_MIDI_MODULATION:
midi_modulation_step = record->event.pressed ? 1 : -1;
return false;
case QK_MIDI_MODULATION_SPEED_DOWN:
if (record->event.pressed) {
midi_config.modulation_interval++;
// prevent overflow
if (midi_config.modulation_interval == 0) midi_config.modulation_interval--;
dprintf("midi modulation interval %d\n", midi_config.modulation_interval);
}
return false;
case QK_MIDI_MODULATION_SPEED_UP:
if (record->event.pressed && midi_config.modulation_interval > 0) {
midi_config.modulation_interval--;
dprintf("midi modulation interval %d\n", midi_config.modulation_interval);
}
return false;
case QK_MIDI_PITCH_BEND_DOWN:
if (record->event.pressed) {
midi_send_pitchbend(&midi_device, midi_config.channel, -0x2000);
dprintf("midi pitchbend channel:%d amount:%d\n", midi_config.channel, -0x2000);
} else {
midi_send_pitchbend(&midi_device, midi_config.channel, 0);
dprintf("midi pitchbend channel:%d amount:%d\n", midi_config.channel, 0);
}
return false;
case QK_MIDI_PITCH_BEND_UP:
if (record->event.pressed) {
midi_send_pitchbend(&midi_device, midi_config.channel, 0x1fff);
dprintf("midi pitchbend channel:%d amount:%d\n", midi_config.channel, 0x1fff);
} else {
midi_send_pitchbend(&midi_device, midi_config.channel, 0);
dprintf("midi pitchbend channel:%d amount:%d\n", midi_config.channel, 0);
}
return false;
};
return true;
}
# endif // MIDI_ADVANCED
void midi_task(void) {
midi_device_process(&midi_device);
# ifdef MIDI_ADVANCED
if (timer_elapsed(midi_modulation_timer) < midi_config.modulation_interval) return;
midi_modulation_timer = timer_read();
if (midi_modulation_step != 0) {
dprintf("midi modulation %d\n", midi_modulation);
midi_send_cc(&midi_device, midi_config.channel, 0x1, midi_modulation);
if (midi_modulation_step < 0 && midi_modulation < -midi_modulation_step) {
midi_modulation = 0;
midi_modulation_step = 0;
return;
}
midi_modulation += midi_modulation_step;
if (midi_modulation > 127) midi_modulation = 127;
}
# endif
}
#endif // MIDI_ENABLE
|
