#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_USE_NOTE_ON_ARRAY #ifdef MIDI_USE_NOTE_ON_ARRAY #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; #else #define MIDI_TONE_COUNT (MIDI_TONE_MAX - MIDI_TONE_MIN + 1) static uint8_t tone_status[MIDI_TONE_COUNT]; #endif 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; #ifdef MIDI_USE_NOTE_ON_ARRAY notes_on.length = 0; #else for (uint8_t i = 0; i < MIDI_TONE_COUNT; i++) { tone_status[i] = MIDI_INVALID_NOTE; } #endif } 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); #ifdef MIDI_USE_NOTE_ON_ARRAY if (record->event.pressed && notes_on.length < MIDI_MAX_NOTES_ON) { #else if (record->event.pressed) { #endif 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); #ifdef MIDI_USE_NOTE_ON_ARRAY notes_on.values[notes_on.length].note = note; notes_on.values[notes_on.length].tone = tone; notes_on.length++; #else tone_status[tone] = note; #endif } else { #ifdef MIDI_USE_NOTE_ON_ARRAY 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; } } #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; #endif } 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; }; #if 0 if (keycode == MI_ON && record->event.pressed) { midi_activated = true; #ifdef AUDIO_ENABLE music_scale_user(); #endif return false; } if (keycode == MI_OFF && record->event.pressed) { midi_activated = false; midi_send_cc(&midi_device, 0, 0x7B, 0); return false; } 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; } #endif return true; }