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skylark-qmk/quantum/audio/audio_arm.c
skullydazed 5fd68266f5 Clueboard 60% support (#1746) 
* initial clueboard_60 support

* LED lighting support

* fix the clueboard->clueboard_66 rename

* Add layout support to clueboard_60

* Fix the 60_iso layout so it's actually iso

* add a default keymap for AEK layout

* fix clueboard_17

* Fixup the ISO layouts

* Fix the `wait_ms()/wait_us()` definitions for chibios

* Fix up the wait_ms/wait_us hack. Reduce stack size.

* Add a missing #include "wait.h"

* commit files that should have already been comitted
2017-09-29 16:17:30 -07:00

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/* Copyright 2016 Jack Humbert
*
* 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 "audio.h"
#include "ch.h"
#include "hal.h"
#include <stdio.h>
#include <string.h>
#include "print.h"
#include "keymap.h"
#include "eeconfig.h"
// -----------------------------------------------------------------------------
int voices = 0;
int voice_place = 0;
float frequency = 0;
float frequency_alt = 0;
int volume = 0;
long position = 0;
float frequencies[8] = {0, 0, 0, 0, 0, 0, 0, 0};
int volumes[8] = {0, 0, 0, 0, 0, 0, 0, 0};
bool sliding = false;
float place = 0;
uint8_t * sample;
uint16_t sample_length = 0;
bool playing_notes = false;
bool playing_note = false;
float note_frequency = 0;
float note_length = 0;
uint8_t note_tempo = TEMPO_DEFAULT;
float note_timbre = TIMBRE_DEFAULT;
uint16_t note_position = 0;
float (* notes_pointer)[][2];
uint16_t notes_count;
bool notes_repeat;
bool note_resting = false;
uint8_t current_note = 0;
uint8_t rest_counter = 0;
#ifdef VIBRATO_ENABLE
float vibrato_counter = 0;
float vibrato_strength = .5;
float vibrato_rate = 0.125;
#endif
float polyphony_rate = 0;
static bool audio_initialized = false;
audio_config_t audio_config;
uint16_t envelope_index = 0;
bool glissando = true;
#ifndef STARTUP_SONG
#define STARTUP_SONG SONG(STARTUP_SOUND)
#endif
float startup_song[][2] = STARTUP_SONG;
static void gpt_cb6(GPTDriver *gptp);
static void gpt_cb7(GPTDriver *gptp);
static void gpt_cb8(GPTDriver *gptp);
/*
* GPT6 configuration.
*/
GPTConfig gpt6cfg1 = {
.frequency = 440,
.callback = gpt_cb6,
.cr2 = TIM_CR2_MMS_1, /* MMS = 010 = TRGO on Update Event. */
.dier = 0U
};
GPTConfig gpt7cfg1 = {
.frequency = 440,
.callback = gpt_cb7,
.cr2 = TIM_CR2_MMS_1, /* MMS = 010 = TRGO on Update Event. */
.dier = 0U
};
GPTConfig gpt8cfg1 = {
.frequency = 10,
.callback = gpt_cb8,
.cr2 = TIM_CR2_MMS_1, /* MMS = 010 = TRGO on Update Event. */
.dier = 0U
};
static void gpt_cb6(GPTDriver *gptp) {
palTogglePad(GPIOA, 4);
}
static void gpt_cb7(GPTDriver *gptp) {
palTogglePad(GPIOA, 5);
}
void audio_init()
{
if (audio_initialized)
return;
// Check EEPROM
// if (!eeconfig_is_enabled())
// {
// eeconfig_init();
// }
// audio_config.raw = eeconfig_read_audio();
audio_config.enable = true;
palSetPadMode(GPIOA, 4, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOA, 5, PAL_MODE_OUTPUT_PUSHPULL);
audio_initialized = true;
if (audio_config.enable) {
PLAY_SONG(startup_song);
}
}
void stop_all_notes()
{
dprintf("audio stop all notes");
if (!audio_initialized) {
audio_init();
}
voices = 0;
gptStopTimer(&GPTD6);
gptStopTimer(&GPTD7);
gptStopTimer(&GPTD8);
playing_notes = false;
playing_note = false;
frequency = 0;
frequency_alt = 0;
volume = 0;
for (uint8_t i = 0; i < 8; i++)
{
frequencies[i] = 0;
volumes[i] = 0;
}
}
void stop_note(float freq)
{
dprintf("audio stop note freq=%d", (int)freq);
if (playing_note) {
if (!audio_initialized) {
audio_init();
}
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) {
gptStopTimer(&GPTD6);
gptStopTimer(&GPTD7);
gptStopTimer(&GPTD8);
frequency = 0;
frequency_alt = 0;
volume = 0;
playing_note = false;
}
}
}
#ifdef VIBRATO_ENABLE
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;
}
#endif
static void restart_gpt6(void) {
// gptStopTimer(&GPTD6);
gptStart(&GPTD6, &gpt6cfg1);
gptStartContinuous(&GPTD6, 2U);
}
static void restart_gpt7(void) {
// gptStopTimer(&GPTD7);
gptStart(&GPTD7, &gpt7cfg1);
gptStartContinuous(&GPTD7, 2U);
}
static void gpt_cb8(GPTDriver *gptp) {
float freq;
if (playing_note) {
if (voices > 0) {
float freq_alt = 0;
if (voices > 1) {
if (polyphony_rate == 0) {
if (glissando) {
if (frequency_alt != 0 && frequency_alt < frequencies[voices - 2] && frequency_alt < frequencies[voices - 2] * pow(2, -440/frequencies[voices - 2]/12/2)) {
frequency_alt = frequency_alt * pow(2, 440/frequency_alt/12/2);
} else if (frequency_alt != 0 && frequency_alt > frequencies[voices - 2] && frequency_alt > frequencies[voices - 2] * pow(2, 440/frequencies[voices - 2]/12/2)) {
frequency_alt = frequency_alt * pow(2, -440/frequency_alt/12/2);
} else {
frequency_alt = frequencies[voices - 2];
}
} else {
frequency_alt = frequencies[voices - 2];
}
#ifdef VIBRATO_ENABLE
if (vibrato_strength > 0) {
freq_alt = vibrato(frequency_alt);
} else {
freq_alt = frequency_alt;
}
#else
freq_alt = frequency_alt;
#endif
}
if (envelope_index < 65535) {
envelope_index++;
}
freq_alt = voice_envelope(freq_alt);
if (freq_alt < 30.517578125) {
freq_alt = 30.52;
}
if (gpt6cfg1.frequency != (uint16_t)freq_alt) {
gpt6cfg1.frequency = freq_alt;
restart_gpt6();
}
//note_timbre;
} else {
// gptStopTimer(&GPTD6);
}
if (polyphony_rate > 0) {
if (voices > 1) {
voice_place %= voices;
if (place++ > (frequencies[voice_place] / polyphony_rate)) {
voice_place = (voice_place + 1) % voices;
place = 0.0;
}
}
#ifdef VIBRATO_ENABLE
if (vibrato_strength > 0) {
freq = vibrato(frequencies[voice_place]);
} else {
freq = frequencies[voice_place];
}
#else
freq = frequencies[voice_place];
#endif
} else {
if (glissando) {
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];
}
} else {
frequency = frequencies[voices - 1];
}
#ifdef VIBRATO_ENABLE
if (vibrato_strength > 0) {
freq = vibrato(frequency);
} else {
freq = frequency;
}
#else
freq = frequency;
#endif
}
if (envelope_index < 65535) {
envelope_index++;
}
freq = voice_envelope(freq);
if (freq < 30.517578125) {
freq = 30.52;
}
if (gpt7cfg1.frequency != (uint16_t)freq) {
gpt7cfg1.frequency = freq;
restart_gpt7();
}
//note_timbre;
} else {
// gptStopTimer(&GPTD7);
}
}
if (playing_notes) {
if (note_frequency > 0) {
#ifdef VIBRATO_ENABLE
if (vibrato_strength > 0) {
freq = vibrato(note_frequency);
} else {
freq = note_frequency;
}
#else
freq = note_frequency;
#endif
if (envelope_index < 65535) {
envelope_index++;
}
freq = voice_envelope(freq);
if (gpt6cfg1.frequency != (uint16_t)freq) {
gpt6cfg1.frequency = freq;
restart_gpt6();
gpt7cfg1.frequency = freq;
restart_gpt7();
}
//note_timbre;
} else {
// gptStopTimer(&GPTD6);
// gptStopTimer(&GPTD7);
}
note_position++;
bool end_of_note = false;
if (gpt6cfg1.frequency > 0) {
if (!note_resting)
end_of_note = (note_position >= (note_length*16 - 1));
else
end_of_note = (note_position >= (note_length*16));
} else {
end_of_note = (note_position >= (note_length*16));
}
if (end_of_note) {
current_note++;
if (current_note >= notes_count) {
if (notes_repeat) {
current_note = 0;
} else {
gptStopTimer(&GPTD6);
gptStopTimer(&GPTD7);
// gptStopTimer(&GPTD8);
playing_notes = false;
return;
}
}
if (!note_resting) {
note_resting = true;
current_note--;
if ((*notes_pointer)[current_note][0] == (*notes_pointer)[current_note + 1][0]) {
note_frequency = 0;
note_length = 1;
} else {
note_frequency = (*notes_pointer)[current_note][0];
note_length = 1;
}
} else {
note_resting = false;
envelope_index = 0;
note_frequency = (*notes_pointer)[current_note][0];
note_length = ((*notes_pointer)[current_note][1] / 4) * (((float)note_tempo) / 100);
}
note_position = 0;
}
}
if (!audio_config.enable) {
playing_notes = false;
playing_note = false;
}
}
void play_note(float freq, int vol) {
dprintf("audio play note freq=%d vol=%d", (int)freq, vol);
if (!audio_initialized) {
audio_init();
}
if (audio_config.enable && voices < 8) {
// Cancel notes if notes are playing
if (playing_notes)
stop_all_notes();
playing_note = true;
envelope_index = 0;
if (freq > 0) {
frequencies[voices] = freq;
volumes[voices] = vol;
voices++;
}
gptStart(&GPTD8, &gpt8cfg1);
gptStartContinuous(&GPTD8, 2U);
}
}
void play_notes(float (*np)[][2], uint16_t n_count, bool n_repeat)
{
if (!audio_initialized) {
audio_init();
}
if (audio_config.enable) {
// Cancel note if a note is playing
if (playing_note)
stop_all_notes();
playing_notes = true;
notes_pointer = np;
notes_count = n_count;
notes_repeat = n_repeat;
place = 0;
current_note = 0;
note_frequency = (*notes_pointer)[current_note][0];
note_length = ((*notes_pointer)[current_note][1] / 4) * (((float)note_tempo) / 100);
note_position = 0;
gptStart(&GPTD8, &gpt8cfg1);
gptStartContinuous(&GPTD8, 2U);
restart_gpt6();
restart_gpt7();
}
}
bool is_playing_notes(void) {
return playing_notes;
}
bool is_audio_on(void) {
return (audio_config.enable != 0);
}
void audio_toggle(void) {
audio_config.enable ^= 1;
eeconfig_update_audio(audio_config.raw);
if (audio_config.enable)
audio_on_user();
}
void audio_on(void) {
audio_config.enable = 1;
eeconfig_update_audio(audio_config.raw);
audio_on_user();
}
void audio_off(void) {
audio_config.enable = 0;
eeconfig_update_audio(audio_config.raw);
}
#ifdef VIBRATO_ENABLE
// 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 /* VIBRATO_STRENGTH_ENABLE */
#endif /* VIBRATO_ENABLE */
// 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(uint8_t tempo) {
note_tempo = tempo;
}
void decrease_tempo(uint8_t tempo_change) {
note_tempo += tempo_change;
}
void increase_tempo(uint8_t tempo_change) {
if (note_tempo - tempo_change < 10) {
note_tempo = 10;
} else {
note_tempo -= tempo_change;
}
}
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