1 /* Copyright 2016 Jack Humbert
3 * This program is free software: you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation, either version 2 of the License, or
6 * (at your option) any later version.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include "musical_notes.h"
26 #include "song_list.h"
31 // Largely untested PWM audio mode (doesn't sound as good)
34 // #define VIBRATO_ENABLE
36 // Enable vibrato strength/amplitude - slows down ISR too much
37 // #define VIBRATO_STRENGTH_ENABLE
47 bool is_audio_on(void);
48 void audio_toggle(void);
52 // Vibrato rate functions
56 void set_vibrato_rate(float rate);
57 void increase_vibrato_rate(float change);
58 void decrease_vibrato_rate(float change);
60 #ifdef VIBRATO_STRENGTH_ENABLE
62 void set_vibrato_strength(float strength);
63 void increase_vibrato_strength(float change);
64 void decrease_vibrato_strength(float change);
70 // Polyphony functions
72 void set_polyphony_rate(float rate);
73 void enable_polyphony(void);
74 void disable_polyphony(void);
75 void increase_polyphony_rate(float change);
76 void decrease_polyphony_rate(float change);
78 void set_timbre(float timbre);
79 void set_tempo(uint8_t tempo);
81 void increase_tempo(uint8_t tempo_change);
82 void decrease_tempo(uint8_t tempo_change);
84 void audio_init(void);
87 void play_sample(uint8_t * s, uint16_t l, bool r);
89 void play_note(float freq, int vol);
90 void stop_note(float freq);
91 void stop_all_notes(void);
92 void play_notes(float (*np)[][2], uint16_t n_count, bool n_repeat);
94 #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), \
95 0 + (12*1), 2 + (12*1), 4 + (12*1), 5 + (12*1), 7 + (12*1), 9 + (12*1), 11 + (12*1), \
96 0 + (12*2), 2 + (12*2), 4 + (12*2), 5 + (12*2), 7 + (12*2), 9 + (12*2), 11 + (12*2), \
97 0 + (12*3), 2 + (12*3), 4 + (12*3), 5 + (12*3), 7 + (12*3), 9 + (12*3), 11 + (12*3), \
98 0 + (12*4), 2 + (12*4), 4 + (12*4), 5 + (12*4), 7 + (12*4), 9 + (12*4), 11 + (12*4), }
100 // These macros are used to allow play_notes to play an array of indeterminate
101 // length. This works around the limitation of C's sizeof operation on pointers.
102 // The global float array for the song must be used here.
103 #define NOTE_ARRAY_SIZE(x) ((int16_t)(sizeof(x) / (sizeof(x[0]))))
104 #define PLAY_NOTE_ARRAY(note_array, note_repeat, deprecated_arg) play_notes(¬e_array, NOTE_ARRAY_SIZE((note_array)), (note_repeat)); \
105 _Pragma ("message \"'PLAY_NOTE_ARRAY' macro is deprecated\"")
106 #define PLAY_SONG(note_array) play_notes(¬e_array, NOTE_ARRAY_SIZE((note_array)), false)
107 #define PLAY_LOOP(note_array) play_notes(¬e_array, NOTE_ARRAY_SIZE((note_array)), true)
109 bool is_playing_notes(void);