/* * 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) 1995-2018 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.com/ * * This software is maintained by Dave Mielke . */ #include "prologue.h" #include #include "log.h" #include "device.h" #include "beep.h" int canBeep (void) { return !!getConsole(); } int synchronousBeep (BeepFrequency frequency, BeepDuration duration) { return 0; } int asynchronousBeep (BeepFrequency frequency, BeepDuration duration) { FILE *console = getConsole(); if (console) { struct wskbd_bell_data bell; if (!(bell.period = duration)) return 1; bell.pitch = frequency; bell.volume = 100; bell.which = WSKBD_BELL_DOALL; if (ioctl(fileno(console), WSKBDIO_COMPLEXBELL, &bell) != -1) return 1; logSystemError("ioctl WSKBDIO_COMPLEXBELL"); } return 0; } int startBeep (BeepFrequency frequency) { return 0; } int stopBeep (void) { FILE *console = getConsole(); if (console) { struct wskbd_bell_data bell; bell.which = WSKBD_BELL_DOVOLUME | WSKBD_BELL_DOPERIOD; bell.volume = 0; bell.period = 0; if (ioctl(fileno(console), WSKBDIO_COMPLEXBELL, &bell) != -1) return 1; logSystemError("ioctl WSKBDIO_COMPLEXBELL"); } return 0; } void endBeep (void) { }