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-rw-r--r--quantum/audio.c434
1 files changed, 321 insertions, 113 deletions
diff --git a/quantum/audio.c b/quantum/audio.c
index 3a3a1a4910..bbdbc824c9 100644
--- a/quantum/audio.c
+++ b/quantum/audio.c
@@ -4,12 +4,19 @@
#include <avr/pgmspace.h>
#include <avr/interrupt.h>
#include <avr/io.h>
-
+#include "print.h"
#include "audio.h"
#include "keymap_common.h"
+#include "eeconfig.h"
+
+#include "vibrato_lut.h"
+
#define PI 3.14159265
+#define CPU_PRESCALER 8
+
+// Largely untested PWM audio mode (doesn't sound as good)
// #define PWM_AUDIO
#ifdef PWM_AUDIO
@@ -45,89 +52,133 @@ uint16_t place_int = 0;
bool repeat = true;
uint8_t * sample;
uint16_t sample_length = 0;
-
+double freq = 0;
bool notes = false;
bool note = false;
float note_frequency = 0;
float note_length = 0;
+float note_tempo = TEMPO_DEFAULT;
+float note_timbre = TIMBRE_DEFAULT;
uint16_t note_position = 0;
float (* notes_pointer)[][2];
-uint8_t notes_length;
+uint8_t notes_count;
bool notes_repeat;
+float notes_rest;
+bool note_resting = false;
+
uint8_t current_note = 0;
+uint8_t rest_counter = 0;
-void stop_all_notes() {
- voices = 0;
- #ifdef PWM_AUDIO
- TIMSK3 &= ~_BV(OCIE3A);
- #else
- TIMSK3 &= ~_BV(OCIE3A);
- TCCR3A &= ~_BV(COM3A1);
- #endif
- notes = false;
- note = false;
- frequency = 0;
- volume = 0;
+float vibrato_counter = 0;
+float vibrato_strength = .5;
+float vibrato_rate = 0.125;
- for (int i = 0; i < 8; i++) {
- frequencies[i] = 0;
- volumes[i] = 0;
- }
+float polyphony_rate = 0;
+
+bool inited = false;
+
+audio_config_t audio_config;
+
+
+void audio_toggle(void) {
+ audio_config.enable ^= 1;
+ eeconfig_write_audio(audio_config.raw);
}
-void stop_note(double freq) {
- #ifdef PWM_AUDIO
- freq = freq / SAMPLE_RATE;
- #endif
- for (int i = 7; i >= 0; i--) {
- if (frequencies[i] == freq) {
- frequencies[i] = 0;
- volumes[i] = 0;
- for (int j = i; (j < 7); j++) {
- frequencies[j] = frequencies[j+1];
- frequencies[j+1] = 0;
- volumes[j] = volumes[j+1];
- volumes[j+1] = 0;
- }
- }
- }
- voices--;
- if (voices < 0)
- voices = 0;
- if (voices == 0) {
- #ifdef PWM_AUDIO
- TIMSK3 &= ~_BV(OCIE3A);
- #else
- TIMSK3 &= ~_BV(OCIE3A);
- TCCR3A &= ~_BV(COM3A1);
- #endif
- frequency = 0;
- volume = 0;
- note = false;
+void audio_on(void) {
+ audio_config.enable = 1;
+ eeconfig_write_audio(audio_config.raw);
+}
+
+void audio_off(void) {
+ audio_config.enable = 0;
+ eeconfig_write_audio(audio_config.raw);
+}
+
+// Vibrato rate functions
+
+void set_vibrato_rate(float rate) {
+ vibrato_rate = rate;
+}
+
+void increase_vibrato_rate(float change) {
+ vibrato_rate *= change;
+}
+
+void decrease_vibrato_rate(float change) {
+ vibrato_rate /= change;
+}
+
+#ifdef VIBRATO_STRENGTH_ENABLE
+
+void set_vibrato_strength(float strength) {
+ vibrato_strength = strength;
+}
+
+void increase_vibrato_strength(float change) {
+ vibrato_strength *= change;
+}
+
+void decrease_vibrato_strength(float change) {
+ vibrato_strength /= change;
+}
+
+#endif
+
+// Polyphony functions
+
+void set_polyphony_rate(float rate) {
+ polyphony_rate = rate;
+}
+
+void enable_polyphony() {
+ polyphony_rate = 5;
+}
+
+void disable_polyphony() {
+ polyphony_rate = 0;
+}
+
+void increase_polyphony_rate(float change) {
+ polyphony_rate *= change;
+}
+
+void decrease_polyphony_rate(float change) {
+ polyphony_rate /= change;
+}
+
+// Timbre function
+
+void set_timbre(float timbre) {
+ note_timbre = timbre;
+}
+
+// Tempo functions
+
+void set_tempo(float tempo) {
+ note_tempo = tempo;
+}
+
+void decrease_tempo(uint8_t tempo_change) {
+ note_tempo += (float) tempo_change;
+}
+
+void increase_tempo(uint8_t tempo_change) {
+ if (note_tempo - (float) tempo_change < 10) {
+ note_tempo = 10;
} else {
- double freq = frequencies[voices - 1];
- int vol = volumes[voices - 1];
- double starting_f = frequency;
- if (frequency < freq) {
- sliding = true;
- for (double f = starting_f; f <= freq; f += ((freq - starting_f) / 2000.0)) {
- frequency = f;
- }
- sliding = false;
- } else if (frequency > freq) {
- sliding = true;
- for (double f = starting_f; f >= freq; f -= ((starting_f - freq) / 2000.0)) {
- frequency = f;
- }
- sliding = false;
- }
- frequency = freq;
- volume = vol;
+ note_tempo -= (float) tempo_change;
}
}
-void init_notes() {
+void audio_init() {
+
+ /* check signature */
+ if (!eeconfig_is_enabled()) {
+ eeconfig_init();
+ }
+ audio_config.raw = eeconfig_read_audio();
#ifdef PWM_AUDIO
PLLFRQ = _BV(PDIV2);
@@ -144,7 +195,7 @@ void init_notes() {
DDRC |= _BV(PORTC6);
TIMSK3 &= ~_BV(OCIE3A); // Turn off 3A interputs
-
+
TCCR3A = 0x0; // Options not needed
TCCR3B = _BV(CS31) | _BV(CS30) | _BV(WGM32); // 64th prescaling and CTC
OCR3A = SAMPLE_DIVIDER - 1; // Correct count/compare, related to sample playback
@@ -156,24 +207,103 @@ void init_notes() {
TCCR3A = (0 << COM3A1) | (0 << COM3A0) | (1 << WGM31) | (0 << WGM30);
TCCR3B = (1 << WGM33) | (1 << WGM32) | (0 << CS32) | (1 << CS31) | (0 << CS30);
#endif
+
+ inited = true;
}
+void stop_all_notes() {
+ if (!inited) {
+ audio_init();
+ }
+ voices = 0;
+ #ifdef PWM_AUDIO
+ TIMSK3 &= ~_BV(OCIE3A);
+ #else
+ TIMSK3 &= ~_BV(OCIE3A);
+ TCCR3A &= ~_BV(COM3A1);
+ #endif
+ notes = false;
+ note = false;
+ frequency = 0;
+ volume = 0;
-ISR(TIMER3_COMPA_vect) {
+ for (int i = 0; i < 8; i++) {
+ frequencies[i] = 0;
+ volumes[i] = 0;
+ }
+}
+
+void stop_note(double freq) {
+ if (note) {
+ if (!inited) {
+ audio_init();
+ }
+ #ifdef PWM_AUDIO
+ freq = freq / SAMPLE_RATE;
+ #endif
+ for (int i = 7; i >= 0; i--) {
+ if (frequencies[i] == freq) {
+ frequencies[i] = 0;
+ volumes[i] = 0;
+ for (int j = i; (j < 7); j++) {
+ frequencies[j] = frequencies[j+1];
+ frequencies[j+1] = 0;
+ volumes[j] = volumes[j+1];
+ volumes[j+1] = 0;
+ }
+ break;
+ }
+ }
+ voices--;
+ if (voices < 0)
+ voices = 0;
+ if (voice_place >= voices) {
+ voice_place = 0;
+ }
+ if (voices == 0) {
+ #ifdef PWM_AUDIO
+ TIMSK3 &= ~_BV(OCIE3A);
+ #else
+ TIMSK3 &= ~_BV(OCIE3A);
+ TCCR3A &= ~_BV(COM3A1);
+ #endif
+ frequency = 0;
+ volume = 0;
+ note = false;
+ }
+ }
+}
+
+float mod(float a, int b)
+{
+ float r = fmod(a, b);
+ return r < 0 ? r + b : r;
+}
+
+float vibrato(float average_freq) {
+ #ifdef VIBRATO_STRENGTH_ENABLE
+ float vibrated_freq = average_freq * pow(VIBRATO_LUT[(int)vibrato_counter], vibrato_strength);
+ #else
+ float vibrated_freq = average_freq * VIBRATO_LUT[(int)vibrato_counter];
+ #endif
+ vibrato_counter = mod((vibrato_counter + vibrato_rate * (1.0 + 440.0/average_freq)), VIBRATO_LUT_LENGTH);
+ return vibrated_freq;
+}
+ISR(TIMER3_COMPA_vect) {
if (note) {
#ifdef PWM_AUDIO
if (voices == 1) {
// SINE
OCR4A = pgm_read_byte(&sinewave[(uint16_t)place]) >> 2;
-
+
// SQUARE
// if (((int)place) >= 1024){
// OCR4A = 0xFF >> 2;
// } else {
// OCR4A = 0x00;
// }
-
+
// SAWTOOTH
// OCR4A = (int)place / 4;
@@ -210,16 +340,37 @@ ISR(TIMER3_COMPA_vect) {
OCR4A = sum;
}
#else
- if (frequency > 0) {
- // ICR3 = (int)(((double)F_CPU) / frequency); // Set max to the period
- // OCR3A = (int)(((double)F_CPU) / frequency) >> 1; // Set compare to half the period
- if (place > 10) {
- voice_place = (voice_place + 1) % voices;
- place = 0.0;
+ if (voices > 0) {
+ if (polyphony_rate > 0) {
+ if (voices > 1) {
+ voice_place %= voices;
+ if (place++ > (frequencies[voice_place] / polyphony_rate / CPU_PRESCALER)) {
+ voice_place = (voice_place + 1) % voices;
+ place = 0.0;
+ }
+ }
+ if (vibrato_strength > 0) {
+ freq = vibrato(frequencies[voice_place]);
+ } else {
+ freq = frequencies[voice_place];
+ }
+ } else {
+ if (frequency != 0 && frequency < frequencies[voices - 1] && frequency < frequencies[voices - 1] * pow(2, -440/frequencies[voices - 1]/12/2)) {
+ frequency = frequency * pow(2, 440/frequency/12/2);
+ } else if (frequency != 0 && frequency > frequencies[voices - 1] && frequency > frequencies[voices - 1] * pow(2, 440/frequencies[voices - 1]/12/2)) {
+ frequency = frequency * pow(2, -440/frequency/12/2);
+ } else {
+ frequency = frequencies[voices - 1];
+ }
+
+ if (vibrato_strength > 0) {
+ freq = vibrato(frequency);
+ } else {
+ freq = frequency;
+ }
}
- ICR3 = (int)(((double)F_CPU) / frequencies[voice_place]); // Set max to the period
- OCR3A = (int)(((double)F_CPU) / frequencies[voice_place]) >> 1; // Set compare to half the period
- place++;
+ ICR3 = (int)(((double)F_CPU) / (freq * CPU_PRESCALER)); // Set max to the period
+ OCR3A = (int)((((double)F_CPU) / (freq * CPU_PRESCALER)) * note_timbre); // Set compare to half the period
}
#endif
}
@@ -245,16 +396,32 @@ ISR(TIMER3_COMPA_vect) {
place -= SINE_LENGTH;
#else
if (note_frequency > 0) {
- ICR3 = (int)(((double)F_CPU) / note_frequency); // Set max to the period
- OCR3A = (int)(((double)F_CPU) / note_frequency) >> 1; // Set compare to half the period
+ float freq;
+
+ if (vibrato_strength > 0) {
+ freq = vibrato(note_frequency);
+ } else {
+ freq = note_frequency;
+ }
+
+ ICR3 = (int)(((double)F_CPU) / (freq * CPU_PRESCALER)); // Set max to the period
+ OCR3A = (int)((((double)F_CPU) / (freq * CPU_PRESCALER)) * note_timbre); // Set compare to half the period
+ } else {
+ ICR3 = 0;
+ OCR3A = 0;
}
#endif
note_position++;
- if (note_position >= note_length) {
+ bool end_of_note = false;
+ if (ICR3 > 0)
+ end_of_note = (note_position >= (note_length / ICR3 * 0xFFFF));
+ else
+ end_of_note = (note_position >= (note_length * 0x7FF));
+ if (end_of_note) {
current_note++;
- if (current_note >= notes_length) {
+ if (current_note >= notes_count) {
if (notes_repeat) {
current_note = 0;
} else {
@@ -268,37 +435,57 @@ ISR(TIMER3_COMPA_vect) {
return;
}
}
- #ifdef PWM_AUDIO
- note_frequency = (*notes_pointer)[current_note][0] / SAMPLE_RATE;
- note_length = (*notes_pointer)[current_note][1];
- #else
- note_frequency = (*notes_pointer)[current_note][0];
- note_length = (*notes_pointer)[current_note][1] / 4;
- #endif
+ if (!note_resting && (notes_rest > 0)) {
+ note_resting = true;
+ note_frequency = 0;
+ note_length = notes_rest;
+ current_note--;
+ } else {
+ note_resting = false;
+ #ifdef PWM_AUDIO
+ note_frequency = (*notes_pointer)[current_note][0] / SAMPLE_RATE;
+ note_length = (*notes_pointer)[current_note][1] * (note_tempo / 100);
+ #else
+ note_frequency = (*notes_pointer)[current_note][0];
+ note_length = ((*notes_pointer)[current_note][1] / 4) * (note_tempo / 100);
+ #endif
+ }
note_position = 0;
}
}
+ if (!audio_config.enable) {
+ notes = false;
+ note = false;
+ }
}
-void play_notes(float (*np)[][2], uint8_t n_length, bool n_repeat) {
+void play_notes(float (*np)[][2], uint8_t n_count, bool n_repeat, float n_rest) {
+
+if (audio_config.enable) {
+ TIMSK3 &= ~_BV(OCIE3A);
+ if (!inited) {
+ audio_init();
+ }
+ // Cancel note if a note is playing
if (note)
stop_all_notes();
notes = true;
notes_pointer = np;
- notes_length = n_length;
+ notes_count = n_count;
notes_repeat = n_repeat;
+ notes_rest = n_rest;
place = 0;
current_note = 0;
#ifdef PWM_AUDIO
note_frequency = (*notes_pointer)[current_note][0] / SAMPLE_RATE;
- note_length = (*notes_pointer)[current_note][1];
+ note_length = (*notes_pointer)[current_note][1] * (note_tempo / 100);
#else
note_frequency = (*notes_pointer)[current_note][0];
- note_length = (*notes_pointer)[current_note][1] / 4;
+ note_length = ((*notes_pointer)[current_note][1] / 4) * (note_tempo / 100);
#endif
note_position = 0;
@@ -311,7 +498,15 @@ void play_notes(float (*np)[][2], uint8_t n_length, bool n_repeat) {
#endif
}
+}
+
void play_sample(uint8_t * s, uint16_t l, bool r) {
+
+if (audio_config.enable) {
+ TIMSK3 &= ~_BV(OCIE3A);
+ if (!inited) {
+ audio_init();
+ }
stop_all_notes();
place_int = 0;
sample = s;
@@ -322,9 +517,19 @@ void play_sample(uint8_t * s, uint16_t l, bool r) {
TIMSK3 |= _BV(OCIE3A);
#else
#endif
+
+}
+
}
void play_note(double freq, int vol) {
+
+if (audio_config.enable && voices < 8) {
+ TIMSK3 &= ~_BV(OCIE3A);
+ if (!inited) {
+ audio_init();
+ }
+ // Cancel notes if notes are playing
if (notes)
stop_all_notes();
note = true;
@@ -332,23 +537,8 @@ void play_note(double freq, int vol) {
freq = freq / SAMPLE_RATE;
#endif
if (freq > 0) {
- if (frequency != 0) {
- double starting_f = frequency;
- if (frequency < freq) {
- for (double f = starting_f; f <= freq; f += ((freq - starting_f) / 2000.0)) {
- frequency = f;
- }
- } else if (frequency > freq) {
- for (double f = starting_f; f >= freq; f -= ((starting_f - freq) / 2000.0)) {
- frequency = f;
- }
- }
- }
- frequency = freq;
- volume = vol;
-
- frequencies[voices] = frequency;
- volumes[voices] = volume;
+ frequencies[voices] = freq;
+ volumes[voices] = vol;
voices++;
}
@@ -358,5 +548,23 @@ void play_note(double freq, int vol) {
TIMSK3 |= _BV(OCIE3A);
TCCR3A |= _BV(COM3A1);
#endif
+}
+
+}
+
+//------------------------------------------------------------------------------
+// Override these functions in your keymap file to play different tunes on
+// startup and bootloader jump
+__attribute__ ((weak))
+void play_startup_tone()
+{
+}
+
+
-} \ No newline at end of file
+__attribute__ ((weak))
+void play_goodbye_tone()
+{
+
+}
+//------------------------------------------------------------------------------
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