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
186
187
|
// vim:ts=8:expandtab
#include <time.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#ifdef LINUX
#include <alsa/asoundlib.h>
#include <alloca.h>
#endif
#ifdef __FreeBSD__
#include <fcntl.h>
#include <unistd.h>
#include <sys/soundcard.h>
#endif
#include "i3status.h"
#include "queue.h"
#ifdef LINUX
struct mixer_hdl {
char *device;
char *mixer;
int mixer_idx;
snd_mixer_selem_id_t *sid;
snd_mixer_t *m;
snd_mixer_elem_t *elem;
long min;
long max;
TAILQ_ENTRY(mixer_hdl) handles;
};
TAILQ_HEAD(handles_head, mixer_hdl) cached = TAILQ_HEAD_INITIALIZER(cached);
static void free_hdl(struct mixer_hdl *hdl) {
free(hdl->device);
free(hdl->mixer);
free(hdl);
}
#endif
void print_volume(const char *fmt, const char *device, const char *mixer, int mixer_idx) {
/* Printing volume only works with ALSA at the moment */
if (output_format == O_I3BAR)
printf("{\"name\":\"volume\", \"instance\": \"%s.%s.%d\", \"full_text\":\"", device, mixer, mixer_idx);
#ifdef LINUX
/* Check if we already opened the mixer and get the handle
* from cache if so */
bool found = false;
int err;
struct mixer_hdl *hdl;
TAILQ_FOREACH(hdl, &cached, handles) {
if (strcmp(hdl->device, device) != 0 ||
strcmp(hdl->mixer, mixer) != 0 ||
hdl->mixer_idx != mixer_idx)
continue;
found = true;
break;
}
if (!found) {
if ((hdl = calloc(sizeof(struct mixer_hdl), 1)) == NULL)
return;
if ((hdl->device = strdup(device)) == NULL) {
free(hdl);
return;
}
if ((hdl->mixer = strdup(mixer)) == NULL) {
free(hdl->device);
free(hdl);
return;
}
hdl->mixer_idx = mixer_idx;
snd_mixer_selem_id_malloc(&(hdl->sid));
if (hdl->sid == NULL) {
free_hdl(hdl);
return;
}
if ((err = snd_mixer_open(&(hdl->m), 0)) < 0) {
fprintf(stderr, "ALSA: Cannot open mixer: %s\n", snd_strerror(err));
free_hdl(hdl);
return;
}
/* Attach this mixer handle to the given device */
if ((err = snd_mixer_attach(hdl->m, device)) < 0) {
fprintf(stderr, "ALSA: Cannot attach mixer to device: %s\n", snd_strerror(err));
snd_mixer_close(hdl->m);
free_hdl(hdl);
return;
}
/* Register this mixer */
if ((err = snd_mixer_selem_register(hdl->m, NULL, NULL)) < 0) {
fprintf(stderr, "ALSA: snd_mixer_selem_register: %s\n", snd_strerror(err));
snd_mixer_close(hdl->m);
free_hdl(hdl);
return;
}
if ((err = snd_mixer_load(hdl->m)) < 0) {
fprintf(stderr, "ALSA: snd_mixer_load: %s\n", snd_strerror(err));
snd_mixer_close(hdl->m);
free_hdl(hdl);
return;
}
/* Find the given mixer */
snd_mixer_selem_id_set_index(hdl->sid, mixer_idx);
snd_mixer_selem_id_set_name(hdl->sid, mixer);
if (!(hdl->elem = snd_mixer_find_selem(hdl->m, hdl->sid))) {
fprintf(stderr, "ALSA: Cannot find mixer %s (index %i)\n",
snd_mixer_selem_id_get_name(hdl->sid), snd_mixer_selem_id_get_index(hdl->sid));
snd_mixer_close(hdl->m);
free_hdl(hdl);
return;
}
/* Get the volume range to convert the volume later */
snd_mixer_selem_get_playback_volume_range(hdl->elem, &(hdl->min), &(hdl->max));
TAILQ_INSERT_TAIL(&cached, hdl, handles);
}
long val;
snd_mixer_handle_events (hdl->m);
snd_mixer_selem_get_playback_volume (hdl->elem, 0, &val);
int avg;
if (hdl->max != 100) {
float avgf = ((float)val / hdl->max) * 100;
avg = (int)avgf;
avg = (avgf - avg < 0.5 ? avg : (avg+1));
} else avg = (int)val;
/* Check for mute */
if (snd_mixer_selem_has_playback_switch(hdl->elem)) {
int pbval;
if ((err = snd_mixer_selem_get_playback_switch(hdl->elem, 0, &pbval)) < 0)
fprintf (stderr, "ALSA: playback_switch: %s\n", snd_strerror(err));
if (!pbval)
avg = 0;
}
const char *walk = fmt;
for (; *walk != '\0'; walk++) {
if (*walk != '%') {
putchar(*walk);
continue;
}
if (BEGINS_WITH(walk+1, "volume")) {
printf("%d%%", avg);
walk += strlen("volume");
}
}
#endif
#ifdef __FreeBSD__
char mixerpath[] = "/dev/mixer";
int mixfd, vol, devmask = 0;
if ((mixfd = open(mixerpath, O_RDWR)) < 0)
return;
if (ioctl(mixfd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1)
return;
if (ioctl(mixfd, MIXER_READ(0),&vol) == -1)
return;
const char *walk = fmt;
for (; *walk != '\0'; walk++) {
if (*walk != '%') {
putchar(*walk);
continue;
}
if (BEGINS_WITH(walk+1, "volume")) {
printf("%d%%", vol & 0x7f);
walk += strlen("volume");
}
}
close(mixfd);
#endif
if (output_format == O_I3BAR)
printf("\"}");
}
|
