text: /*
  Copyright 2015 Jack Humbert <jack.humb@gmail.com>
  
  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 "keymap_common.h"
  #include "keymap_midi.h"
  #include <lufa.h>
  
  uint8_t starting_note = 0x0C;
  int offset = 7;
  
  void action_function(keyrecord_t *record, uint8_t id, uint8_t opt)
  {
  	if (id != 0) {
  	    if (record->event.pressed) {
  	    	midi_send_noteon(&midi_device, opt, (id & 0xFF), 127);
  	    } else {
  	        midi_send_noteoff(&midi_device, opt, (id & 0xFF), 127);
  	    }
  	}
  
      if (record->event.key.col == (MATRIX_COLS - 1) && record->event.key.row == (MATRIX_ROWS - 1)) {
          if (record->event.pressed) {
              starting_note++;
              play_note(((double)261.6)*pow(2.0, -1.0)*pow(2.0,(starting_note + SCALE[0 + offset])/12.0+(MATRIX_ROWS - 1)), 0xC);
              midi_send_cc(&midi_device, 0, 0x7B, 0);
              midi_send_cc(&midi_device, 1, 0x7B, 0);
              midi_send_cc(&midi_device, 2, 0x7B, 0);
              midi_send_cc(&midi_device, 3, 0x7B, 0);
              midi_send_cc(&midi_device, 4, 0x7B, 0);
              return;
          } else {
              stop_note(((double)261.6)*pow(2.0, -1.0)*pow(2.0,(starting_note + SCALE[0 + offset])/12.0+(MATRIX_ROWS - 1)));
              stop_all_notes();
              return;
          }
      }
      if (record->event.key.col == (MATRIX_COLS - 2) && record->event.key.row == (MATRIX_ROWS - 1)) {
          if (record->event.pressed) {
              starting_note--;
              play_note(((double)261.6)*pow(2.0, -1.0)*pow(2.0,(starting_note + SCALE[0 + offset])/12.0+(MATRIX_ROWS - 1)), 0xC);
              midi_send_cc(&midi_device, 0, 0x7B, 0);
              midi_send_cc(&midi_device, 1, 0x7B, 0);
              midi_send_cc(&midi_device, 2, 0x7B, 0);
              midi_send_cc(&midi_device, 3, 0x7B, 0);
              midi_send_cc(&midi_device, 4, 0x7B, 0);
              return;
          } else {
              stop_note(((double)261.6)*pow(2.0, -1.0)*pow(2.0,(starting_note + SCALE[0 + offset])/12.0+(MATRIX_ROWS - 1)));
              stop_all_notes();
              return;
          }
      }
  
      if (record->event.key.col == (MATRIX_COLS - 3) && record->event.key.row == (MATRIX_ROWS - 1) && record->event.pressed) {
          offset++;
          midi_send_cc(&midi_device, 0, 0x7B, 0);
          midi_send_cc(&midi_device, 1, 0x7B, 0);
          midi_send_cc(&midi_device, 2, 0x7B, 0);
          midi_send_cc(&midi_device, 3, 0x7B, 0);
          midi_send_cc(&midi_device, 4, 0x7B, 0);
          stop_all_notes();
          for (int i = 0; i <= 7; i++) {
              play_note(((double)261.6)*pow(2.0, -1.0)*pow(2.0,(starting_note + SCALE[i + offset])/12.0+(MATRIX_ROWS - 1)), 0xC);
              _delay_us(80000);
              stop_note(((double)261.6)*pow(2.0, -1.0)*pow(2.0,(starting_note + SCALE[i + offset])/12.0+(MATRIX_ROWS - 1)));
              _delay_us(8000);
          }
          return;
      }
      if (record->event.key.col == (MATRIX_COLS - 4) && record->event.key.row == (MATRIX_ROWS - 1) && record->event.pressed) {
          offset--;
          midi_send_cc(&midi_device, 0, 0x7B, 0);
          midi_send_cc(&midi_device, 1, 0x7B, 0);
          midi_send_cc(&midi_device, 2, 0x7B, 0);
          midi_send_cc(&midi_device, 3, 0x7B, 0);
          midi_send_cc(&midi_device, 4, 0x7B, 0);
          stop_all_notes();
          for (int i = 0; i <= 7; i++) {
              play_note(((double)261.6)*pow(2.0, -1.0)*pow(2.0,(starting_note + SCALE[i + offset])/12.0+(MATRIX_ROWS - 1)), 0xC);
              _delay_us(80000);
              stop_note(((double)261.6)*pow(2.0, -1.0)*pow(2.0,(starting_note + SCALE[i + offset])/12.0+(MATRIX_ROWS - 1)));
              _delay_us(8000);
          }
          return;
      }
  
      if (record->event.pressed) {
      	// midi_send_noteon(&midi_device, record->event.key.row, starting_note + SCALE[record->event.key.col], 127);
          midi_send_noteon(&midi_device, 0, (starting_note + SCALE[record->event.key.col + offset])+12*(MATRIX_ROWS - record->event.key.row), 127);
          play_note(((double)261.6)*pow(2.0, -1.0)*pow(2.0,(starting_note + SCALE[record->event.key.col + offset])/12.0+(MATRIX_ROWS - record->event.key.row)), 0xF);
      } else {
          // midi_send_noteoff(&midi_device, record->event.key.row, starting_note + SCALE[record->event.key.col], 127);
          midi_send_noteoff(&midi_device, 0, (starting_note + SCALE[record->event.key.col + offset])+12*(MATRIX_ROWS - record->event.key.row), 127);
          stop_note(((double)261.6)*pow(2.0, -1.0)*pow(2.0,(starting_note + SCALE[record->event.key.col + offset])/12.0+(MATRIX_ROWS - record->event.key.row)));
      }
  }