- /* 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 = MI_OCT_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 MI_OCTD:
- if (record->event.pressed && midi_config.octave > 0) {
- midi_config.octave--;
- dprintf("midi octave %d\n", midi_config.octave);
- }
- return false;
- case MI_OCTU:
- 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 - MI_TRNS_0;
- dprintf("midi transpose %d\n", midi_config.transpose);
- }
- return false;
- case MI_TRNSD:
- if (record->event.pressed && midi_config.transpose > (MIDI_TRANSPOSE_MIN - MI_TRNS_0)) {
- midi_config.transpose--;
- dprintf("midi transpose %d\n", midi_config.transpose);
- }
- return false;
- case MI_TRNSU:
- if (record->event.pressed && midi_config.transpose < (MIDI_TRANSPOSE_MAX - MI_TRNS_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 MI_VELD:
- 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 MI_VELU:
- 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 MI_CHD:
- if (record->event.pressed) {
- midi_config.channel--;
- dprintf("midi channel %d\n", midi_config.channel);
- }
- return false;
- case MI_CHU:
- if (record->event.pressed) {
- midi_config.channel++;
- dprintf("midi channel %d\n", midi_config.channel);
- }
- return false;
- case MI_ALLOFF:
- if (record->event.pressed) {
- midi_send_cc(&midi_device, midi_config.channel, 0x7B, 0);
- dprintf("midi all notes off\n");
- }
- return false;
- case MI_SUS:
- 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 MI_PORT:
- 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 MI_SOST:
- 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 MI_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 MI_LEG:
- midi_send_cc(&midi_device, midi_config.channel, 0x43, record->event.pressed ? 127 : 0);
- dprintf("midi legato %d\n", record->event.pressed);
- return false;
- case MI_MOD:
- midi_modulation_step = record->event.pressed ? 1 : -1;
- return false;
- case MI_MODSD:
- 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 MI_MODSU:
- 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 MI_BENDD:
- 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 MI_BENDU:
- 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
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