48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
/* Copyright © 2020 tyrolyean
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _SOUND_H
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#define _SOUND_H
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#include <stdint.h>
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#include <avr/pgmspace.h>
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struct tone_t {
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uint8_t waveform;
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int16_t frequency_deviation; /* */
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uint16_t length; /* The tone length in milliseconds */
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};
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/* The end marker tells the sound routines where the end of a track is. It
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* is required to be present at the end of EVERY track, otherwise the
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* routine runs into undefined behaviour */
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#define TRACK_END_MARKER {DAC_MODE_SILENT, 0, 0}
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extern const struct tone_t computer_room_track[] PROGMEM;
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extern const struct tone_t lonely_road_track[] PROGMEM;
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#define INTRO_LEN 10350
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extern const struct tone_t intro_track[] PROGMEM;
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extern const struct tone_t * current_track;
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extern int16_t global_frequency_offset; /* Added to every playing song */
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void update_sound();
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void init_sound();
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#endif
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