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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>.
*/
#include "prologue.h"
#include <string.h>
#include <fcntl.h>
#undef CAN_BEEP
#if defined(HAVE_DEV_SPEAKER_SPEAKER_H)
#include <dev/speaker/speaker.h>
#define CAN_BEEP
#elif defined(HAVE_MACHINE_SPEAKER_H)
#include <machine/speaker.h>
#define CAN_BEEP
#else /* speaker.h */
#warning beeps not available on this installation: no speaker.h
#endif /* speaker.h */
#ifdef CAN_BEEP
#include "log.h"
#include "beep.h"
static int speaker = -1;
static int
getSpeaker (void) {
if (speaker == -1) {
if ((speaker = open("/dev/speaker", O_WRONLY)) != -1) {
logMessage(LOG_DEBUG, "Speaker opened: fd=%d", speaker);
} else {
logSystemError("speaker open");
}
}
return speaker;
}
#endif /* CAN_BEEP */
int
canBeep (void) {
#ifdef CAN_BEEP
return 1;
#else /* CAN_BEEP */
return 0;
#endif /* CAN_BEEP */
}
int
synchronousBeep (BeepFrequency frequency, BeepDuration duration) {
#ifdef CAN_BEEP
int speaker = getSpeaker();
if (speaker != -1) {
tone_t tone;
memset(&tone, 0, sizeof(tone));
tone.frequency = frequency;
tone.duration = (duration + 9) / 10;
if (ioctl(speaker, SPKRTONE, &tone) != -1) return 1;
logSystemError("speaker tone");
}
#endif /* CAN_BEEP */
return 0;
}
int
asynchronousBeep (BeepFrequency frequency, BeepDuration duration) {
return 0;
}
int
startBeep (BeepFrequency frequency) {
return 0;
}
int
stopBeep (void) {
return 0;
}
void
endBeep (void) {
#ifdef CAN_BEEP
if (speaker != -1) {
close(speaker);
speaker = -1;
}
#endif /* CAN_BEEP */
}
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