From 6d6b166b40d41da6b4994d1ac0fdec1d41f56598 Mon Sep 17 00:00:00 2001 From: Jack Humbert Date: Thu, 10 Aug 2017 16:01:02 -0400 Subject: [PATCH] arm audio working --- quantum/audio/audio_arm.c | 606 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 606 insertions(+) create mode 100644 quantum/audio/audio_arm.c diff --git a/quantum/audio/audio_arm.c b/quantum/audio/audio_arm.c new file mode 100644 index 000000000..5ad0c86ec --- /dev/null +++ b/quantum/audio/audio_arm.c @@ -0,0 +1,606 @@ +/* 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 . + */ + +#include "audio.h" +#include "ch.h" +#include "hal.h" + +#include +#include +#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; + } +}