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qmk_firmware

custom branch of QMK firmware git clone https://anongit.hacktivis.me/git/qmk_firmware.git

process_audio.c (1524B)

    

  1. #include "audio.h"
  2. #include "process_audio.h"
  3. #include <math.h>
  5. #ifndef VOICE_CHANGE_SONG
  6. #    define VOICE_CHANGE_SONG SONG(VOICE_CHANGE_SOUND)
  7. #endif
  8. float voice_change_song[][2] = VOICE_CHANGE_SONG;
  10. #ifndef PITCH_STANDARD_A
  11. #    define PITCH_STANDARD_A 440.0f
  12. #endif
  14. float compute_freq_for_midi_note(uint8_t note) {
  15.     // https://en.wikipedia.org/wiki/MIDI_tuning_standard
  16.     return powf(2.0f, (note - 69) / 12.0f) * PITCH_STANDARD_A;
  17. }
  19. bool process_audio(uint16_t keycode, keyrecord_t *record) {
  20.     if (keycode == QK_AUDIO_ON && record->event.pressed) {
  21.         audio_on();
  22.         return false;
  23.     }
  25.     if (keycode == QK_AUDIO_OFF && record->event.pressed) {
  26.         audio_off();
  27.         return false;
  28.     }
  30.     if (keycode == QK_AUDIO_TOGGLE && record->event.pressed) {
  31.         if (is_audio_on()) {
  32.             audio_off();
  33.         } else {
  34.             audio_on();
  35.         }
  36.         return false;
  37.     }
  39.     if (keycode == QK_AUDIO_VOICE_NEXT && record->event.pressed) {
  40.         voice_iterate();
  41.         PLAY_SONG(voice_change_song);
  42.         return false;
  43.     }
  45.     if (keycode == QK_AUDIO_VOICE_PREVIOUS && record->event.pressed) {
  46.         voice_deiterate();
  47.         PLAY_SONG(voice_change_song);
  48.         return false;
  49.     }
  51.     return true;
  52. }
  54. void process_audio_noteon(uint8_t note) {
  55.     play_note(compute_freq_for_midi_note(note), 0xF);
  56. }
  58. void process_audio_noteoff(uint8_t note) {
  59.     stop_note(compute_freq_for_midi_note(note));
  60. }
  62. void process_audio_all_notes_off(void) {
  63.     stop_all_notes();
  64. }