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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) 1995-2010 by The BRLTTY Developers.
*
* BRLTTY comes with ABSOLUTELY NO WARRANTY.
*
* This is free software, placed under the terms of the
* GNU General Public License, as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any
* later version. Please see the file LICENSE-GPL for details.
*
* Web Page: http://mielke.cc/brltty/
*
* This software is maintained by Dave Mielke <dave@mielke.cc>.
*/
#include "prologue.h"
#include "log.h"
#include "timing.h"
#include "system.h"
#include "notes.h"
struct NoteDeviceStruct {
char mustHaveAtLeastOneField;
};
static NoteDevice *
beeperConstruct (int errorLevel) {
NoteDevice *device;
if ((device = malloc(sizeof(*device)))) {
if (canBeep()) {
LogPrint(LOG_DEBUG, "beeper enabled");
return device;
}
free(device);
} else {
LogError("malloc");
}
LogPrint(LOG_DEBUG, "beeper not available");
return NULL;
}
static int
beeperPlay (NoteDevice *device, int note, int duration) {
LogPrint(LOG_DEBUG, "tone: msec=%d note=%d",
duration, note);
if (!note) {
accurateDelay(duration);
return 1;
}
if (asynchronousBeep((int)noteFrequencies[note], duration*4)) {
accurateDelay(duration);
stopBeep();
return 1;
}
if (startBeep((int)noteFrequencies[note])) {
accurateDelay(duration);
stopBeep();
return 1;
}
return synchronousBeep((int)noteFrequencies[note], duration);
}
static int
beeperFlush (NoteDevice *device) {
return 1;
}
static void
beeperDestruct (NoteDevice *device) {
endBeep();
free(device);
LogPrint(LOG_DEBUG, "beeper disabled");
}
const NoteMethods beeperMethods = {
beeperConstruct,
beeperPlay,
beeperFlush,
beeperDestruct
};
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