/* 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/>. */ #ifndef AUDIO_H #define AUDIO_H #include <stdint.h> #include <stdbool.h> #if defined(__AVR__) #include <avr/io.h> #endif #include "wait.h" #include "musical_notes.h" #include "song_list.h" #include "voices.h" #include "quantum.h" #include <math.h> // Largely untested PWM audio mode (doesn't sound as good) // #define PWM_AUDIO // #define VIBRATO_ENABLE // Enable vibrato strength/amplitude - slows down ISR too much // #define VIBRATO_STRENGTH_ENABLE typedef union { uint8_t raw; struct { bool enable :1; bool clicky_enable :1; uint8_t level :6; }; } audio_config_t; bool is_audio_on(void); void audio_toggle(void); void audio_on(void); void audio_off(void); // Vibrato rate functions #ifdef VIBRATO_ENABLE void set_vibrato_rate(float rate); void increase_vibrato_rate(float change); void decrease_vibrato_rate(float change); #ifdef VIBRATO_STRENGTH_ENABLE void set_vibrato_strength(float strength); void increase_vibrato_strength(float change); void decrease_vibrato_strength(float change); #endif #endif // Polyphony functions void set_polyphony_rate(float rate); void enable_polyphony(void); void disable_polyphony(void); void increase_polyphony_rate(float change); void decrease_polyphony_rate(float change); void set_timbre(float timbre); void set_tempo(uint8_t tempo); void increase_tempo(uint8_t tempo_change); void decrease_tempo(uint8_t tempo_change); void audio_init(void); #ifdef PWM_AUDIO void play_sample(uint8_t * s, uint16_t l, bool r); #endif void play_note(float freq, int vol); void stop_note(float freq); void stop_all_notes(void); void play_notes(float (*np)[][2], uint16_t n_count, bool n_repeat); #define SCALE (int8_t []){ 0 + (12*0), 2 + (12*0), 4 + (12*0), 5 + (12*0), 7 + (12*0), 9 + (12*0), 11 + (12*0), \ 0 + (12*1), 2 + (12*1), 4 + (12*1), 5 + (12*1), 7 + (12*1), 9 + (12*1), 11 + (12*1), \ 0 + (12*2), 2 + (12*2), 4 + (12*2), 5 + (12*2), 7 + (12*2), 9 + (12*2), 11 + (12*2), \ 0 + (12*3), 2 + (12*3), 4 + (12*3), 5 + (12*3), 7 + (12*3), 9 + (12*3), 11 + (12*3), \ 0 + (12*4), 2 + (12*4), 4 + (12*4), 5 + (12*4), 7 + (12*4), 9 + (12*4), 11 + (12*4), } // These macros are used to allow play_notes to play an array of indeterminate // length. This works around the limitation of C's sizeof operation on pointers. // The global float array for the song must be used here. #define NOTE_ARRAY_SIZE(x) ((int16_t)(sizeof(x) / (sizeof(x[0])))) #define PLAY_NOTE_ARRAY(note_array, note_repeat, deprecated_arg) play_notes(¬e_array, NOTE_ARRAY_SIZE((note_array)), (note_repeat)); \ _Pragma ("message \"'PLAY_NOTE_ARRAY' macro is deprecated\"") #define PLAY_SONG(note_array) play_notes(¬e_array, NOTE_ARRAY_SIZE((note_array)), false) #define PLAY_LOOP(note_array) play_notes(¬e_array, NOTE_ARRAY_SIZE((note_array)), true) bool is_playing_notes(void); #endif