qmk_firmware/quantum/process_keycode/process_audio.c
Gabriel Young a64ae10662 Update existing keymaps
Update existing keymaps to enable MIDI_BASIC functionality.  Also added
an option MIDI_ENABLE_STRICT to be strict about keycode use (which also
reduces memory footprint at runtime)
2017-02-25 20:41:13 -08:00

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1.3 KiB
C

#include "audio.h"
#include "process_audio.h"
static float compute_freq_for_midi_note(uint8_t note)
{
// https://en.wikipedia.org/wiki/MIDI_tuning_standard
return pow(2.0, (note - 69) / 12.0) * 440.0f;
}
bool process_audio(uint16_t keycode, keyrecord_t *record) {
if (keycode == AU_ON && record->event.pressed) {
audio_on();
return false;
}
if (keycode == AU_OFF && record->event.pressed) {
audio_off();
return false;
}
if (keycode == AU_TOG && record->event.pressed) {
if (is_audio_on())
{
audio_off();
}
else
{
audio_on();
}
return false;
}
if (keycode == MUV_IN && record->event.pressed) {
voice_iterate();
music_scale_user();
return false;
}
if (keycode == MUV_DE && record->event.pressed) {
voice_deiterate();
music_scale_user();
return false;
}
return true;
}
void process_audio_noteon(uint8_t note) {
play_note(compute_freq_for_midi_note(note), 0xF);
}
void process_audio_noteoff(uint8_t note) {
stop_note(compute_freq_for_midi_note(note));
}
void process_audio_stop_all_notes(void) {
stop_all_notes();
}
__attribute__ ((weak))
void audio_on_user() {}