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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/* Copyright 2004-2005 Sun Microsystems, Inc. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, and/or sell copies of the Software, and to permit persons
* to whom the Software is furnished to do so, provided that the above
* copyright notice(s) and this permission notice appear in all copies of
* the Software and that both the above copyright notice(s) and this
* permission notice appear in supporting documentation.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
* OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
* INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Except as contained in this notice, the name of a copyright holder
* shall not be used in advertising or otherwise to promote the sale, use
* or other dealings in this Software without prior written authorization
* of the copyright holder.
*/
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include <sys/audio.h>
#include <sys/uio.h>
#include <limits.h>
#include <math.h>
#include <poll.h>
#include "xf86.h"
#include "xf86Priv.h"
#include "xf86_OSlib.h"
#define BELL_RATE 48000 /* Samples per second */
#define BELL_HZ 50 /* Fraction of a second i.e. 1/x */
#define BELL_MS (1000/BELL_HZ) /* MS */
#define BELL_SAMPLES (BELL_RATE / BELL_HZ)
#define BELL_MIN 3 /* Min # of repeats */
#define AUDIO_DEVICE "/dev/audio"
void
xf86OSRingBell(int loudness, int pitch, int duration)
{
static short samples[BELL_SAMPLES];
static short silence[BELL_SAMPLES]; /* "The Sound of Silence" */
static int lastFreq;
int cnt;
int i;
int written;
int repeats;
int freq;
audio_info_t audioInfo;
struct iovec iov[IOV_MAX];
int iovcnt;
double ampl, cyclen, phase;
int audioFD;
if ((loudness <= 0) || (pitch <= 0) || (duration <= 0)) {
return;
}
lastFreq = 0;
bzero(silence, sizeof(silence));
audioFD = open(AUDIO_DEVICE, O_WRONLY | O_NONBLOCK);
if (audioFD == -1) {
xf86Msg(X_ERROR, "Bell: cannot open audio device \"%s\": %s\n",
AUDIO_DEVICE, strerror(errno));
return;
}
freq = pitch;
freq = min(freq, (BELL_RATE / 2) - 1);
freq = max(freq, 2 * BELL_HZ);
/*
* Ensure full waves per buffer
*/
freq -= freq % BELL_HZ;
if (freq != lastFreq) {
lastFreq = freq;
ampl = 16384.0;
cyclen = (double) freq / (double) BELL_RATE;
phase = 0.0;
for (i = 0; i < BELL_SAMPLES; i++) {
samples[i] = (short) (ampl * sin(2.0 * M_PI * phase));
phase += cyclen;
if (phase >= 1.0)
phase -= 1.0;
}
}
repeats = (duration + (BELL_MS / 2)) / BELL_MS;
repeats = max(repeats, BELL_MIN);
loudness = max(0, loudness);
loudness = min(loudness, 100);
#ifdef DEBUG
ErrorF("BELL : freq %d volume %d duration %d repeats %d\n",
freq, loudness, duration, repeats);
#endif
AUDIO_INITINFO(&audioInfo);
audioInfo.play.encoding = AUDIO_ENCODING_LINEAR;
audioInfo.play.sample_rate = BELL_RATE;
audioInfo.play.channels = 2;
audioInfo.play.precision = 16;
audioInfo.play.gain = min(AUDIO_MAX_GAIN, AUDIO_MAX_GAIN * loudness / 100);
if (ioctl(audioFD, AUDIO_SETINFO, &audioInfo) < 0){
xf86Msg(X_ERROR,
"Bell: AUDIO_SETINFO failed on audio device \"%s\": %s\n",
AUDIO_DEVICE, strerror(errno));
close(audioFD);
return;
}
iovcnt = 0;
for (cnt = 0; cnt <= repeats; cnt++) {
iov[iovcnt].iov_base = (char *) samples;
iov[iovcnt++].iov_len = sizeof(samples);
if (cnt == repeats) {
/* Insert a bit of silence so that multiple beeps are distinct and
* not compressed into a single tone.
*/
iov[iovcnt].iov_base = (char *) silence;
iov[iovcnt++].iov_len = sizeof(silence);
}
if ((iovcnt >= IOV_MAX) || (cnt == repeats)) {
written = writev(audioFD, iov, iovcnt);
if ((written < ((int)(sizeof(samples) * iovcnt)))) {
/* audio buffer was full! */
int naptime;
if (written == -1) {
if (errno != EAGAIN) {
xf86Msg(X_ERROR,
"Bell: writev failed on audio device \"%s\": %s\n",
AUDIO_DEVICE, strerror(errno));
close(audioFD);
return;
}
i = iovcnt;
} else {
i = ((sizeof(samples) * iovcnt) - written)
/ sizeof(samples);
}
cnt -= i;
/* sleep a little to allow audio buffer to drain */
naptime = BELL_MS * i;
poll(NULL, 0, naptime);
i = ((sizeof(samples) * iovcnt) - written) % sizeof(samples);
iovcnt = 0;
if ((written != -1) && (i > 0)) {
iov[iovcnt].iov_base = ((char *) samples) + i;
iov[iovcnt++].iov_len = sizeof(samples) - i;
}
} else {
iovcnt = 0;
}
}
}
close(audioFD);
return;
}
|
