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
43 bool clicky_enable :1;
48 bool is_audio_on(void);
49 void audio_toggle(void);
53 // Vibrato rate functions
57 void set_vibrato_rate(float rate);
58 void increase_vibrato_rate(float change);
59 void decrease_vibrato_rate(float change);
61 #ifdef VIBRATO_STRENGTH_ENABLE
63 void set_vibrato_strength(float strength);
64 void increase_vibrato_strength(float change);
65 void decrease_vibrato_strength(float change);
71 // Polyphony functions
73 void set_polyphony_rate(float rate);
74 void enable_polyphony(void);
75 void disable_polyphony(void);
76 void increase_polyphony_rate(float change);
77 void decrease_polyphony_rate(float change);
79 void set_timbre(float timbre);
80 void set_tempo(uint8_t tempo);
82 void increase_tempo(uint8_t tempo_change);
83 void decrease_tempo(uint8_t tempo_change);
85 void audio_init(void);
88 void play_sample(uint8_t * s, uint16_t l, bool r);
90 void play_note(float freq, int vol);
91 void stop_note(float freq);
92 void stop_all_notes(void);
93 void play_notes(float (*np)[][2], uint16_t n_count, bool n_repeat);
95 #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), \
96 0 + (12*1), 2 + (12*1), 4 + (12*1), 5 + (12*1), 7 + (12*1), 9 + (12*1), 11 + (12*1), \
97 0 + (12*2), 2 + (12*2), 4 + (12*2), 5 + (12*2), 7 + (12*2), 9 + (12*2), 11 + (12*2), \
98 0 + (12*3), 2 + (12*3), 4 + (12*3), 5 + (12*3), 7 + (12*3), 9 + (12*3), 11 + (12*3), \
99 0 + (12*4), 2 + (12*4), 4 + (12*4), 5 + (12*4), 7 + (12*4), 9 + (12*4), 11 + (12*4), }
101 // These macros are used to allow play_notes to play an array of indeterminate
102 // length. This works around the limitation of C's sizeof operation on pointers.
103 // The global float array for the song must be used here.
104 #define NOTE_ARRAY_SIZE(x) ((int16_t)(sizeof(x) / (sizeof(x[0]))))
105 #define PLAY_NOTE_ARRAY(note_array, note_repeat, deprecated_arg) play_notes(¬e_array, NOTE_ARRAY_SIZE((note_array)), (note_repeat)); \
106 _Pragma ("message \"'PLAY_NOTE_ARRAY' macro is deprecated\"")
107 #define PLAY_SONG(note_array) play_notes(¬e_array, NOTE_ARRAY_SIZE((note_array)), false)
108 #define PLAY_LOOP(note_array) play_notes(¬e_array, NOTE_ARRAY_SIZE((note_array)), true)
110 bool is_playing_notes(void);