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Diffstat (limited to 'quantum/audio/audio_chibios.c')
| -rw-r--r-- | quantum/audio/audio_chibios.c | 702 |
1 files changed, 702 insertions, 0 deletions
diff --git a/quantum/audio/audio_chibios.c b/quantum/audio/audio_chibios.c new file mode 100644 index 000000000..fba7c5987 --- /dev/null +++ b/quantum/audio/audio_chibios.c @@ -0,0 +1,702 @@ +/* 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 <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; + +uint16_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_cb8(GPTDriver *gptp); + +#define DAC_BUFFER_SIZE 100 +#ifndef DAC_SAMPLE_MAX +# define DAC_SAMPLE_MAX 65535U +#endif + +#define START_CHANNEL_1() \ + gptStart(&GPTD6, &gpt6cfg1); \ + gptStartContinuous(&GPTD6, 2U) +#define START_CHANNEL_2() \ + gptStart(&GPTD7, &gpt7cfg1); \ + gptStartContinuous(&GPTD7, 2U) +#define STOP_CHANNEL_1() gptStopTimer(&GPTD6) +#define STOP_CHANNEL_2() gptStopTimer(&GPTD7) +#define RESTART_CHANNEL_1() \ + STOP_CHANNEL_1(); \ + START_CHANNEL_1() +#define RESTART_CHANNEL_2() \ + STOP_CHANNEL_2(); \ + START_CHANNEL_2() +#define UPDATE_CHANNEL_1_FREQ(freq) \ + gpt6cfg1.frequency = freq * DAC_BUFFER_SIZE; \ + RESTART_CHANNEL_1() +#define UPDATE_CHANNEL_2_FREQ(freq) \ + gpt7cfg1.frequency = freq * DAC_BUFFER_SIZE; \ + RESTART_CHANNEL_2() +#define GET_CHANNEL_1_FREQ (uint16_t)(gpt6cfg1.frequency * DAC_BUFFER_SIZE) +#define GET_CHANNEL_2_FREQ (uint16_t)(gpt7cfg1.frequency * DAC_BUFFER_SIZE) + +/* + * GPT6 configuration. + */ +// static const GPTConfig gpt6cfg1 = { +// .frequency = 1000000U, +// .callback = NULL, +// .cr2 = TIM_CR2_MMS_1, /* MMS = 010 = TRGO on Update Event. */ +// .dier = 0U +// }; + +GPTConfig gpt6cfg1 = {.frequency = 440U * DAC_BUFFER_SIZE, + .callback = NULL, + .cr2 = TIM_CR2_MMS_1, /* MMS = 010 = TRGO on Update Event. */ + .dier = 0U}; + +GPTConfig gpt7cfg1 = {.frequency = 440U * DAC_BUFFER_SIZE, + .callback = NULL, + .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}; + +/* + * DAC test buffer (sine wave). + */ +// static const dacsample_t dac_buffer[DAC_BUFFER_SIZE] = { +// 2047, 2082, 2118, 2154, 2189, 2225, 2260, 2296, 2331, 2367, 2402, 2437, +// 2472, 2507, 2542, 2576, 2611, 2645, 2679, 2713, 2747, 2780, 2813, 2846, +// 2879, 2912, 2944, 2976, 3008, 3039, 3070, 3101, 3131, 3161, 3191, 3221, +// 3250, 3278, 3307, 3335, 3362, 3389, 3416, 3443, 3468, 3494, 3519, 3544, +// 3568, 3591, 3615, 3637, 3660, 3681, 3703, 3723, 3744, 3763, 3782, 3801, +// 3819, 3837, 3854, 3870, 3886, 3902, 3917, 3931, 3944, 3958, 3970, 3982, +// 3993, 4004, 4014, 4024, 4033, 4041, 4049, 4056, 4062, 4068, 4074, 4078, +// 4082, 4086, 4089, 4091, 4092, 4093, 4094, 4093, 4092, 4091, 4089, 4086, +// 4082, 4078, 4074, 4068, 4062, 4056, 4049, 4041, 4033, 4024, 4014, 4004, +// 3993, 3982, 3970, 3958, 3944, 3931, 3917, 3902, 3886, 3870, 3854, 3837, +// 3819, 3801, 3782, 3763, 3744, 3723, 3703, 3681, 3660, 3637, 3615, 3591, +// 3568, 3544, 3519, 3494, 3468, 3443, 3416, 3389, 3362, 3335, 3307, 3278, +// 3250, 3221, 3191, 3161, 3131, 3101, 3070, 3039, 3008, 2976, 2944, 2912, +// 2879, 2846, 2813, 2780, 2747, 2713, 2679, 2645, 2611, 2576, 2542, 2507, +// 2472, 2437, 2402, 2367, 2331, 2296, 2260, 2225, 2189, 2154, 2118, 2082, +// 2047, 2012, 1976, 1940, 1905, 1869, 1834, 1798, 1763, 1727, 1692, 1657, +// 1622, 1587, 1552, 1518, 1483, 1449, 1415, 1381, 1347, 1314, 1281, 1248, +// 1215, 1182, 1150, 1118, 1086, 1055, 1024, 993, 963, 933, 903, 873, +// 844, 816, 787, 759, 732, 705, 678, 651, 626, 600, 575, 550, +// 526, 503, 479, 457, 434, 413, 391, 371, 350, 331, 312, 293, +// 275, 257, 240, 224, 208, 192, 177, 163, 150, 136, 124, 112, +// 101, 90, 80, 70, 61, 53, 45, 38, 32, 26, 20, 16, +// 12, 8, 5, 3, 2, 1, 0, 1, 2, 3, 5, 8, +// 12, 16, 20, 26, 32, 38, 45, 53, 61, 70, 80, 90, +// 101, 112, 124, 136, 150, 163, 177, 192, 208, 224, 240, 257, +// 275, 293, 312, 331, 350, 371, 391, 413, 434, 457, 479, 503, +// 526, 550, 575, 600, 626, 651, 678, 705, 732, 759, 787, 816, +// 844, 873, 903, 933, 963, 993, 1024, 1055, 1086, 1118, 1150, 1182, +// 1215, 1248, 1281, 1314, 1347, 1381, 1415, 1449, 1483, 1518, 1552, 1587, +// 1622, 1657, 1692, 1727, 1763, 1798, 1834, 1869, 1905, 1940, 1976, 2012 +// }; + +// static const dacsample_t dac_buffer_2[DAC_BUFFER_SIZE] = { +// 12, 8, 5, 3, 2, 1, 0, 1, 2, 3, 5, 8, +// 12, 16, 20, 26, 32, 38, 45, 53, 61, 70, 80, 90, +// 101, 112, 124, 136, 150, 163, 177, 192, 208, 224, 240, 257, +// 275, 293, 312, 331, 350, 371, 391, 413, 434, 457, 479, 503, +// 526, 550, 575, 600, 626, 651, 678, 705, 732, 759, 787, 816, +// 844, 873, 903, 933, 963, 993, 1024, 1055, 1086, 1118, 1150, 1182, +// 1215, 1248, 1281, 1314, 1347, 1381, 1415, 1449, 1483, 1518, 1552, 1587, +// 1622, 1657, 1692, 1727, 1763, 1798, 1834, 1869, 1905, 1940, 1976, 2012, +// 2047, 2082, 2118, 2154, 2189, 2225, 2260, 2296, 2331, 2367, 2402, 2437, +// 2472, 2507, 2542, 2576, 2611, 2645, 2679, 2713, 2747, 2780, 2813, 2846, +// 2879, 2912, 2944, 2976, 3008, 3039, 3070, 3101, 3131, 3161, 3191, 3221, +// 3250, 3278, 3307, 3335, 3362, 3389, 3416, 3443, 3468, 3494, 3519, 3544, +// 3568, 3591, 3615, 3637, 3660, 3681, 3703, 3723, 3744, 3763, 3782, 3801, +// 3819, 3837, 3854, 3870, 3886, 3902, 3917, 3931, 3944, 3958, 3970, 3982, +// 3993, 4004, 4014, 4024, 4033, 4041, 4049, 4056, 4062, 4068, 4074, 4078, +// 4082, 4086, 4089, 4091, 4092, 4093, 4094, 4093, 4092, 4091, 4089, 4086, +// 4082, 4078, 4074, 4068, 4062, 4056, 4049, 4041, 4033, 4024, 4014, 4004, +// 3993, 3982, 3970, 3958, 3944, 3931, 3917, 3902, 3886, 3870, 3854, 3837, +// 3819, 3801, 3782, 3763, 3744, 3723, 3703, 3681, 3660, 3637, 3615, 3591, +// 3568, 3544, 3519, 3494, 3468, 3443, 3416, 3389, 3362, 3335, 3307, 3278, +// 3250, 3221, 3191, 3161, 3131, 3101, 3070, 3039, 3008, 2976, 2944, 2912, +// 2879, 2846, 2813, 2780, 2747, 2713, 2679, 2645, 2611, 2576, 2542, 2507, +// 2472, 2437, 2402, 2367, 2331, 2296, 2260, 2225, 2189, 2154, 2118, 2082, +// 2047, 2012, 1976, 1940, 1905, 1869, 1834, 1798, 1763, 1727, 1692, 1657, +// 1622, 1587, 1552, 1518, 1483, 1449, 1415, 1381, 1347, 1314, 1281, 1248, +// 1215, 1182, 1150, 1118, 1086, 1055, 1024, 993, 963, 933, 903, 873, +// 844, 816, 787, 759, 732, 705, 678, 651, 626, 600, 575, 550, +// 526, 503, 479, 457, 434, 413, 391, 371, 350, 331, 312, 293, +// 275, 257, 240, 224, 208, 192, 177, 163, 150, 136, 124, 112, +// 101, 90, 80, 70, 61, 53, 45, 38, 32, 26, 20, 16 +// }; + +// squarewave +static const dacsample_t dac_buffer[DAC_BUFFER_SIZE] = { + // First half is max, second half is 0 + [0 ... DAC_BUFFER_SIZE / 2 - 1] = DAC_SAMPLE_MAX, + [DAC_BUFFER_SIZE / 2 ... DAC_BUFFER_SIZE - 1] = 0, +}; + +// squarewave +static const dacsample_t dac_buffer_2[DAC_BUFFER_SIZE] = { + // opposite of dac_buffer above + [0 ... DAC_BUFFER_SIZE / 2 - 1] = 0, + [DAC_BUFFER_SIZE / 2 ... DAC_BUFFER_SIZE - 1] = DAC_SAMPLE_MAX, +}; + +/* + * DAC streaming callback. + */ +size_t nz = 0; +static void end_cb1(DACDriver *dacp) { + (void)dacp; + + nz++; + if ((nz % 1000) == 0) { + // palTogglePad(GPIOD, GPIOD_LED3); + } +} + +/* + * DAC error callback. + */ +static void error_cb1(DACDriver *dacp, dacerror_t err) { + (void)dacp; + (void)err; + + chSysHalt("DAC failure"); +} + +static const DACConfig dac1cfg1 = {.init = DAC_SAMPLE_MAX, .datamode = DAC_DHRM_12BIT_RIGHT}; + +static const DACConversionGroup dacgrpcfg1 = {.num_channels = 1U, .end_cb = end_cb1, .error_cb = error_cb1, .trigger = DAC_TRG(0)}; + +static const DACConfig dac1cfg2 = {.init = DAC_SAMPLE_MAX, .datamode = DAC_DHRM_12BIT_RIGHT}; + +static const DACConversionGroup dacgrpcfg2 = {.num_channels = 1U, .end_cb = end_cb1, .error_cb = error_cb1, .trigger = DAC_TRG(0)}; + +void audio_init() { + if (audio_initialized) { + return; + } + +// Check EEPROM +#ifdef EEPROM_ENABLE + if (!eeconfig_is_enabled()) { + eeconfig_init(); + } + audio_config.raw = eeconfig_read_audio(); +#else // ARM EEPROM + audio_config.enable = true; +# ifdef AUDIO_CLICKY_ON + audio_config.clicky_enable = true; +# endif +#endif // ARM EEPROM + + /* + * Starting DAC1 driver, setting up the output pin as analog as suggested + * by the Reference Manual. + */ + palSetPadMode(GPIOA, 4, PAL_MODE_INPUT_ANALOG); + palSetPadMode(GPIOA, 5, PAL_MODE_INPUT_ANALOG); + dacStart(&DACD1, &dac1cfg1); + dacStart(&DACD2, &dac1cfg2); + + /* + * Starting GPT6/7 driver, it is used for triggering the DAC. + */ + START_CHANNEL_1(); + START_CHANNEL_2(); + + /* + * Starting a continuous conversion. + */ + dacStartConversion(&DACD1, &dacgrpcfg1, (dacsample_t *)dac_buffer, DAC_BUFFER_SIZE); + dacStartConversion(&DACD2, &dacgrpcfg2, (dacsample_t *)dac_buffer_2, DAC_BUFFER_SIZE); + + audio_initialized = true; + + if (audio_config.enable) { + PLAY_SONG(startup_song); + } else { + stop_all_notes(); + } +} + +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) { + STOP_CHANNEL_1(); + STOP_CHANNEL_2(); + 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 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 (GET_CHANNEL_2_FREQ != (uint16_t)freq_alt) { + UPDATE_CHANNEL_2_FREQ(freq_alt); + } else { + RESTART_CHANNEL_2(); + } + // note_timbre; + } + + 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 (GET_CHANNEL_1_FREQ != (uint16_t)freq) { + UPDATE_CHANNEL_1_FREQ(freq); + } else { + RESTART_CHANNEL_1(); + } + // note_timbre; + } + } + + 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 (GET_CHANNEL_1_FREQ != (uint16_t)freq) { + UPDATE_CHANNEL_1_FREQ(freq); + UPDATE_CHANNEL_2_FREQ(freq); + } + // note_timbre; + } else { + // gptStopTimer(&GPTD6); + // gptStopTimer(&GPTD7); + } + + note_position++; + bool end_of_note = false; + if (GET_CHANNEL_1_FREQ > 0) { + if (!note_resting) + end_of_note = (note_position >= (note_length * 8 - 1)); + else + end_of_note = (note_position >= (note_length * 8)); + } else { + end_of_note = (note_position >= (note_length * 8)); + } + + if (end_of_note) { + current_note++; + if (current_note >= notes_count) { + if (notes_repeat) { + current_note = 0; + } else { + STOP_CHANNEL_1(); + STOP_CHANNEL_2(); + // 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); + RESTART_CHANNEL_1(); + RESTART_CHANNEL_2(); + } +} + +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_CHANNEL_1(); + RESTART_CHANNEL_2(); + } +} + +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) { + stop_all_notes(); + 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; + } +} |