You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
127 lines
3.9 KiB
127 lines
3.9 KiB
#include "process_midi.h"
|
|
|
|
#if 0
|
|
bool midi_activated = false;
|
|
uint8_t midi_starting_note = 0x0C;
|
|
int midi_offset = 7;
|
|
#endif
|
|
|
|
typedef union {
|
|
uint16_t raw;
|
|
struct {
|
|
uint8_t octave :4;
|
|
uint8_t velocity :4;
|
|
uint8_t channel :4;
|
|
};
|
|
} midi_config_t;
|
|
|
|
midi_config_t midi_config;
|
|
|
|
#define MIDI_INVALID_NOTE 0xFF
|
|
|
|
#define MIDI_MAX_NOTES_ON 10
|
|
|
|
typedef struct {
|
|
uint8_t note;
|
|
uint8_t tone;
|
|
} midi_notes_on_array_entry_t;
|
|
|
|
typedef struct {
|
|
uint8_t length;
|
|
midi_notes_on_array_entry_t values[MIDI_MAX_NOTES_ON];
|
|
} midi_notes_on_array_t;
|
|
|
|
static midi_notes_on_array_t notes_on;
|
|
|
|
inline uint8_t compute_velocity(uint8_t setting)
|
|
{
|
|
return (setting + 1) * (128 / (MIDI_VELOCITY_MAX - MIDI_VELOCITY_MIN + 1));
|
|
}
|
|
|
|
void midi_init(void)
|
|
{
|
|
midi_config.octave = MI_OCT_0 - MIDI_OCTAVE_MIN;
|
|
midi_config.velocity = (MIDI_VELOCITY_MAX - MIDI_VELOCITY_MIN);
|
|
midi_config.channel = 0;
|
|
notes_on.length = 0;
|
|
}
|
|
|
|
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 = compute_velocity(midi_config.velocity);
|
|
if (record->event.pressed && notes_on.length < MIDI_MAX_NOTES_ON) {
|
|
uint8_t note = 12 * midi_config.octave + tone;
|
|
midi_send_noteon(&midi_device, channel, note, velocity);
|
|
dprintf("midi noteon channel:%d note:%d velocity:%d\n", channel, note, velocity);
|
|
notes_on.values[notes_on.length].note = note;
|
|
notes_on.values[notes_on.length].tone = tone;
|
|
notes_on.length++;
|
|
}
|
|
else {
|
|
for (uint8_t i = 0; i < notes_on.length; i++) {
|
|
uint8_t note = notes_on.values[i].note;
|
|
if (tone == notes_on.values[i].tone) {
|
|
midi_send_noteoff(&midi_device, channel, note, velocity);
|
|
dprintf("midi noteoff channel:%d note:%d velocity:%d\n", channel, note, velocity);
|
|
|
|
for (uint8_t j=i; j < notes_on.length - 1; j++)
|
|
{
|
|
notes_on.values[j] = notes_on.values[j + 1];
|
|
}
|
|
|
|
notes_on.length--;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
case MIDI_OCTAVE_MIN ... MIDI_OCTAVE_MAX:
|
|
if (record->event.pressed)
|
|
midi_config.octave = keycode - MIDI_OCTAVE_MIN;
|
|
return false;
|
|
case MI_OCTD:
|
|
if (record->event.pressed && midi_config.octave > 0)
|
|
midi_config.octave--;
|
|
return false;
|
|
case MI_OCTU:
|
|
if (record->event.pressed && midi_config.octave < (MIDI_OCTAVE_MAX - MIDI_OCTAVE_MIN))
|
|
midi_config.octave++;
|
|
return false;
|
|
case MIDI_VELOCITY_MIN ... MIDI_VELOCITY_MAX:
|
|
if (record->event.pressed)
|
|
midi_config.velocity = keycode - MIDI_VELOCITY_MIN;
|
|
return false;
|
|
case MI_VELD:
|
|
if (record->event.pressed && midi_config.velocity > 0)
|
|
midi_config.velocity--;
|
|
return false;
|
|
case MI_VELU:
|
|
if (record->event.pressed)
|
|
midi_config.velocity++;
|
|
return false;
|
|
case MIDI_CHANNEL_MIN ... MIDI_CHANNEL_MAX:
|
|
if (record->event.pressed)
|
|
midi_config.channel = keycode - MIDI_CHANNEL_MIN;
|
|
return false;
|
|
case MI_CHD:
|
|
if (record->event.pressed)
|
|
midi_config.channel--;
|
|
return false;
|
|
case MI_CHU:
|
|
if (record->event.pressed)
|
|
midi_config.channel++;
|
|
return false;
|
|
case MI_SUS:
|
|
//TODO
|
|
return false;
|
|
};
|
|
|
|
return true;
|
|
}
|