summaryrefslogtreecommitdiff
path: root/protocol/lufa/midi/midi.c
blob: 11a589078c9de8f8746eaffc325a57180e8636e9 (plain)
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
277
//midi for embedded chips,
//Copyright 2010 Alex Norman
//
//This file is part of avr-midi.
//
//avr-midi 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.
//
//avr-midi 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 avr-midi.  If not, see <http://www.gnu.org/licenses/>.

#include "midi.h"
#include <string.h> //for memcpy

#define MIN(x,y) (((x) < (y)) ? (x) : (y)) 

#ifndef NULL
#define NULL 0
#endif

bool midi_is_statusbyte(uint8_t theByte){
   return (bool)(theByte & MIDI_STATUSMASK);
}

bool midi_is_realtime(uint8_t theByte){
   return (theByte >= MIDI_CLOCK);
}

midi_packet_length_t midi_packet_length(uint8_t status){
   switch(status & 0xF0){
      case MIDI_CC:
      case MIDI_NOTEON:
      case MIDI_NOTEOFF:
      case MIDI_AFTERTOUCH:
      case MIDI_PITCHBEND:
         return THREE;
      case MIDI_PROGCHANGE:
      case MIDI_CHANPRESSURE:
      case MIDI_SONGSELECT:
         return TWO;
      case 0xF0:
         switch(status) {
            case MIDI_CLOCK:
            case MIDI_TICK:
            case MIDI_START:
            case MIDI_CONTINUE:
            case MIDI_STOP:
            case MIDI_ACTIVESENSE:
            case MIDI_RESET:
            case MIDI_TUNEREQUEST:
               return ONE;
            case MIDI_SONGPOSITION:
               return THREE;
            case MIDI_TC_QUARTERFRAME:
            case MIDI_SONGSELECT:
               return TWO;
            case SYSEX_END:
            case SYSEX_BEGIN:
            default:
               return UNDEFINED;
         }
      default:
         return UNDEFINED;
   }
}

void midi_send_cc(MidiDevice * device, uint8_t chan, uint8_t num, uint8_t val){
   //CC Status: 0xB0 to 0xBF where the low nibble is the MIDI channel.
   //CC Data: Controller Num, Controller Val
   device->send_func(device, 3,
         MIDI_CC | (chan & MIDI_CHANMASK),
         num & 0x7F,
         val & 0x7F);
}

void midi_send_noteon(MidiDevice * device, uint8_t chan, uint8_t num, uint8_t vel){
   //Note Data: Note Num, Note Velocity
   device->send_func(device, 3,
         MIDI_NOTEON | (chan & MIDI_CHANMASK),
         num & 0x7F,
         vel & 0x7F);
}

void midi_send_noteoff(MidiDevice * device, uint8_t chan, uint8_t num, uint8_t vel){
   //Note Data: Note Num, Note Velocity
   device->send_func(device, 3,
         MIDI_NOTEOFF | (chan & MIDI_CHANMASK),
         num & 0x7F,
         vel & 0x7F);
}

void midi_send_aftertouch(MidiDevice * device, uint8_t chan, uint8_t note_num, uint8_t amt){
   device->send_func(device, 3,
         MIDI_AFTERTOUCH | (chan & MIDI_CHANMASK),
         note_num & 0x7F,
         amt & 0x7F);
}

//XXX does this work right?
//amt in range -0x2000, 0x1fff
//uAmt should be in range..
//0x0000 to 0x3FFF
void midi_send_pitchbend(MidiDevice * device, uint8_t chan, int16_t amt){
   uint16_t uAmt;
   //check range
   if(amt > 0x1fff){
      uAmt = 0x3FFF;
   } else if(amt < -0x2000){
      uAmt = 0;
   } else {
      uAmt = amt + 0x2000;
   }
   device->send_func(device, 3,
         MIDI_PITCHBEND | (chan & MIDI_CHANMASK),
         uAmt & 0x7F,
         (uAmt >> 7) & 0x7F);
}

void midi_send_programchange(MidiDevice * device, uint8_t chan, uint8_t num){
   device->send_func(device, 2,
         MIDI_PROGCHANGE | (chan & MIDI_CHANMASK),
         num & 0x7F,
         0);
}

void midi_send_channelpressure(MidiDevice * device, uint8_t chan, uint8_t amt){
   device->send_func(device, 2,
         MIDI_CHANPRESSURE | (chan & MIDI_CHANMASK),
         amt & 0x7F,
         0);
}

void midi_send_clock(MidiDevice * device){
   device->send_func(device, 1, MIDI_CLOCK, 0, 0);
}

void midi_send_tick(MidiDevice * device){
   device->send_func(device, 1, MIDI_TICK, 0, 0);
}

void midi_send_start(MidiDevice * device){
   device->send_func(device, 1, MIDI_START, 0, 0);
}

void midi_send_continue(MidiDevice * device){
   device->send_func(device, 1, MIDI_CONTINUE, 0, 0);
}

void midi_send_stop(MidiDevice * device){
   device->send_func(device, 1, MIDI_STOP, 0, 0);
}

void midi_send_activesense(MidiDevice * device){
   device->send_func(device, 1, MIDI_ACTIVESENSE, 0, 0);
}

void midi_send_reset(MidiDevice * device){
   device->send_func(device, 1, MIDI_RESET, 0, 0);
}

void midi_send_tcquarterframe(MidiDevice * device, uint8_t time){
   device->send_func(device, 2,
         MIDI_TC_QUARTERFRAME,
         time & 0x7F,
         0);
}

//XXX is this right?
void midi_send_songposition(MidiDevice * device, uint16_t pos){
   device->send_func(device, 3,
         MIDI_SONGPOSITION,
         pos & 0x7F,
         (pos >> 7) & 0x7F);
}

void midi_send_songselect(MidiDevice * device, uint8_t song){
   device->send_func(device, 2,
         MIDI_SONGSELECT,
         song & 0x7F,
         0);
}

void midi_send_tunerequest(MidiDevice * device){
   device->send_func(device, 1, MIDI_TUNEREQUEST, 0, 0);
}

void midi_send_byte(MidiDevice * device, uint8_t b){
   device->send_func(device, 1, b, 0, 0);
}

void midi_send_data(MidiDevice * device, uint16_t count, uint8_t byte0, uint8_t byte1, uint8_t byte2){
   //ensure that the count passed along is always 3 or lower
   if (count > 3) {
      //TODO how to do this correctly?
   }
   device->send_func(device, count, byte0, byte1, byte2);
}

void midi_send_array(MidiDevice * device, uint16_t count, uint8_t * array) {
  uint16_t i;
  for (i = 0; i < count; i += 3) {
    uint8_t b[3] = { 0, 0, 0 };
    uint16_t to_send = count - i;
    to_send = (to_send > 3) ? 3 : to_send;
    memcpy(b, array + i, to_send);
    midi_send_data(device, to_send, b[0], b[1], b[2]);
  }
}


void midi_register_cc_callback(MidiDevice * device, midi_three_byte_func_t func){
   device->input_cc_callback = func;
}

void midi_register_noteon_callback(MidiDevice * device, midi_three_byte_func_t func){
   device->input_noteon_callback = func;
}

void midi_register_noteoff_callback(MidiDevice * device, midi_three_byte_func_t func){
   device->input_noteoff_callback = func;
}

void midi_register_aftertouch_callback(MidiDevice * device, midi_three_byte_func_t func){
   device->input_aftertouch_callback = func;
}

void midi_register_pitchbend_callback(MidiDevice * device, midi_three_byte_func_t func){
   device->input_pitchbend_callback = func;
}

void midi_register_songposition_callback(MidiDevice * device, midi_three_byte_func_t func){
   device->input_songposition_callback = func;
}

void midi_register_progchange_callback(MidiDevice * device, midi_two_byte_func_t func) {
   device->input_progchange_callback = func;
}

void midi_register_chanpressure_callback(MidiDevice * device, midi_two_byte_func_t func) {
   device->input_chanpressure_callback = func;
}

void midi_register_songselect_callback(MidiDevice * device, midi_two_byte_func_t func) {
   device->input_songselect_callback = func;
}

void midi_register_tc_quarterframe_callback(MidiDevice * device, midi_two_byte_func_t func) {
   device->input_tc_quarterframe_callback = func;
}

void midi_register_realtime_callback(MidiDevice * device, midi_one_byte_func_t func){
   device->input_realtime_callback = func;
}

void midi_register_tunerequest_callback(MidiDevice * device, midi_one_byte_func_t func){
   device->input_tunerequest_callback = func;
}

void midi_register_sysex_callback(MidiDevice * device, midi_sysex_func_t func) {
   device->input_sysex_callback = func;
}

void midi_register_fallthrough_callback(MidiDevice * device, midi_var_byte_func_t func){
   device->input_fallthrough_callback = func;
}

void midi_register_catchall_callback(MidiDevice * device, midi_var_byte_func_t func){
   device->input_catchall_callback = func;
}