107 lines
3.3 KiB
C
107 lines
3.3 KiB
C
/* 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>
|
|
#include <avr/io.h>
|
|
#include <util/delay.h>
|
|
#include "musical_notes.h"
|
|
#include "song_list.h"
|
|
#include "voices.h"
|
|
#include "quantum.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;
|
|
uint8_t level :7;
|
|
};
|
|
} 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, float n_rest);
|
|
|
|
#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, note_rest_style) play_notes(¬e_array, NOTE_ARRAY_SIZE((note_array)), (note_repeat), (note_rest_style));
|
|
|
|
|
|
bool is_playing_notes(void);
|
|
|
|
#endif
|