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/*
* BRLTTY - A background process providing access to the console screen (when in
* text mode) for a blind person using a refreshable braille display.
*
* Copyright (C) 1995-2025 by The BRLTTY Developers.
*
* BRLTTY comes with ABSOLUTELY NO WARRANTY.
*
* This is free software, placed under the terms of the
* GNU Lesser General Public License, as published by the Free Software
* Foundation; either version 2.1 of the License, or (at your option) any
* later version. Please see the file LICENSE-LGPL for details.
*
* Web Page: http://brltty.app/
*
* This software is maintained by Dave Mielke <dave@mielke.cc>.
*/
#ifndef BRLTTY_INCLUDED_NOTES
#define BRLTTY_INCLUDED_NOTES
#include "note_types.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define NOTES_PER_OCTAVE 12
#define NOTE_MIDDLE_C 60
extern unsigned char getLowestNote (void);
extern unsigned char getHighestNote (void);
extern uint32_t getIntegerNoteFrequency (unsigned char note);
extern unsigned char getNearestNote (NoteFrequency frequency);
#ifdef NO_FLOAT
#define getNoteFrequency getIntegerNoteFrequency
#else /* NO_FLOAT */
extern float getRealNoteFrequency (unsigned char note);
#define getNoteFrequency getRealNoteFrequency
#endif /* NO_FLOAT */
typedef struct NoteDeviceStruct NoteDevice;
typedef struct {
NoteDevice * (*construct) (int errorLevel);
void (*destruct) (NoteDevice *device);
int (*tone) (NoteDevice *device, unsigned int duration, NoteFrequency frequency);
int (*note) (NoteDevice *device, unsigned int duration, unsigned char note);
int (*flush) (NoteDevice *device);
} NoteMethods;
extern const NoteMethods beepNoteMethods;
extern const NoteMethods pcmNoteMethods;
extern const NoteMethods midiNoteMethods;
extern const NoteMethods fmNoteMethods;
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* BRLTTY_INCLUDED_NOTES */
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