1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/*
* 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 "log.h"
#include "device.h"
#define BEEP_DIVIDEND 1193180
static void
enableBeeps (void) {
static int status = 0;
installKernelModule("pcspkr", &status);
}
int
canBeep (void) {
enableBeeps();
return getConsole() != -1;
}
int
synchronousBeep (unsigned short frequency, unsigned short milliseconds) {
return 0;
}
int
asynchronousBeep (unsigned short frequency, unsigned short milliseconds) {
int console = getConsole();
if (console != -1) {
if (ioctl(console, KDMKTONE, ((milliseconds << 0X10) | (BEEP_DIVIDEND / frequency))) != -1) return 1;
LogError("ioctl KDMKTONE");
}
return 0;
}
int
startBeep (unsigned short frequency) {
int console = getConsole();
if (console != -1) {
if (ioctl(console, KIOCSOUND, BEEP_DIVIDEND/frequency) != -1) return 1;
LogError("ioctl KIOCSOUND");
}
return 0;
}
int
stopBeep (void) {
int console = getConsole();
if (console != -1) {
if (ioctl(console, KIOCSOUND, 0) != -1) return 1;
LogError("ioctl KIOCSOUND");
}
return 0;
}
void
endBeep (void) {
}
|
