diff options
Diffstat (limited to 'quantum/process_keycode/process_midi.c')
| -rw-r--r-- | quantum/process_keycode/process_midi.c | 307 |
1 files changed, 246 insertions, 61 deletions
diff --git a/quantum/process_keycode/process_midi.c b/quantum/process_keycode/process_midi.c index 577dad43ac..9184feaae8 100644 --- a/quantum/process_keycode/process_midi.c +++ b/quantum/process_keycode/process_midi.c @@ -1,68 +1,253 @@ +/* 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" -bool midi_activated = false; -uint8_t midi_starting_note = 0x0C; -int midi_offset = 7; - -bool process_midi(uint16_t keycode, keyrecord_t *record) { - if (keycode == MI_ON && record->event.pressed) { - midi_activated = true; -#ifdef AUDIO_ENABLE - music_scale_user(); -#endif - return false; - } +#ifdef MIDI_ENABLE +#include "midi.h" + +#ifdef MIDI_BASIC + +void process_midi_basic_noteon(uint8_t note) +{ + midi_send_noteon(&midi_device, 0, note, 128); +} + +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[MIDI_TONE_COUNT]; + +static uint8_t midi_modulation; +static int8_t midi_modulation_step; +static uint16_t midi_modulation_timer; + +inline uint8_t compute_velocity(uint8_t setting) +{ + return (setting + 1) * (128 / (MIDI_VELOCITY_MAX - MIDI_VELOCITY_MIN + 1)); +} - if (keycode == MI_OFF && record->event.pressed) { - midi_activated = false; - midi_send_cc(&midi_device, 0, 0x7B, 0); - return false; +void midi_init(void) +{ + midi_config.octave = MI_OCT_2 - MIDI_OCTAVE_MIN; + midi_config.transpose = 0; + midi_config.velocity = (MIDI_VELOCITY_MAX - MIDI_VELOCITY_MIN); + midi_config.channel = 0; + midi_config.modulation_interval = 8; + + for (uint8_t i = 0; i < MIDI_TONE_COUNT; i++) + { + tone_status[i] = MIDI_INVALID_NOTE; } - if (midi_activated) { - if (record->event.key.col == (MATRIX_COLS - 1) && record->event.key.row == (MATRIX_ROWS - 1)) { - if (record->event.pressed) { - midi_starting_note++; // Change key - midi_send_cc(&midi_device, 0, 0x7B, 0); - } - return false; - } - if (record->event.key.col == (MATRIX_COLS - 2) && record->event.key.row == (MATRIX_ROWS - 1)) { - if (record->event.pressed) { - midi_starting_note--; // Change key - midi_send_cc(&midi_device, 0, 0x7B, 0); - } - return false; - } - if (record->event.key.col == (MATRIX_COLS - 3) && record->event.key.row == (MATRIX_ROWS - 1) && record->event.pressed) { - midi_offset++; // Change scale - midi_send_cc(&midi_device, 0, 0x7B, 0); - return false; - } - if (record->event.key.col == (MATRIX_COLS - 4) && record->event.key.row == (MATRIX_ROWS - 1) && record->event.pressed) { - midi_offset--; // Change scale - midi_send_cc(&midi_device, 0, 0x7B, 0); - return false; - } - // basic - // uint8_t note = (midi_starting_note + SCALE[record->event.key.col + midi_offset])+12*(MATRIX_ROWS - record->event.key.row); - // advanced - // uint8_t note = (midi_starting_note + record->event.key.col + midi_offset)+12*(MATRIX_ROWS - record->event.key.row); - // guitar - uint8_t note = (midi_starting_note + record->event.key.col + midi_offset)+5*(MATRIX_ROWS - record->event.key.row); - // violin - // uint8_t note = (midi_starting_note + record->event.key.col + midi_offset)+7*(MATRIX_ROWS - record->event.key.row); - - if (record->event.pressed) { - // midi_send_noteon(&midi_device, record->event.key.row, midi_starting_note + SCALE[record->event.key.col], 127); - midi_send_noteon(&midi_device, 0, note, 127); - } else { - // midi_send_noteoff(&midi_device, record->event.key.row, midi_starting_note + SCALE[record->event.key.col], 127); - midi_send_noteoff(&midi_device, 0, note, 127); - } - - if (keycode < 0xFF) // ignores all normal keycodes, but lets RAISE, LOWER, etc through - return false; + midi_modulation = 0; + midi_modulation_step = 0; + midi_modulation_timer = 0; +} + +void midi_task(void) +{ + 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; } - return true; } + +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 = compute_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[tone] = note; + } + else { + uint8_t note = tone_status[tone]; + if (note != MIDI_INVALID_NOTE) + { + midi_send_noteoff(&midi_device, channel, note, velocity); + dprintf("midi noteoff channel:%d note:%d velocity:%d\n", channel, note, velocity); + } + tone_status[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 = 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) { + midi_config.velocity--; + dprintf("midi velocity %d\n", midi_config.velocity); + } + return false; + case MI_VELU: + if (record->event.pressed) { + midi_config.velocity++; + 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; + }; + + return true; +} + +#endif // MIDI_ADVANCED + +#endif // MIDI_ENABLE |