1 /* Conky, a system monitor, based on torsmo
3 * Any original torsmo code is licensed under the BSD license
5 * All code written since the fork of torsmo is licensed under the GPL
7 * Please see COPYING for details
9 * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
10 * Copyright (c) 2005-2008 Brenden Matthews, Philip Kovacs, et. al.
12 * All rights reserved.
14 * This program is free software: you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation, either version 3 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program. If not, see <http://www.gnu.org/licenses/>.
30 #include <sys/ioctl.h>
35 #ifdef HAVE_LINUX_SOUNDCARD_H
36 #include <linux/soundcard.h>
39 #include <soundcard.h>
41 #include <sys/soundcard.h>
42 #endif /* __OpenBSD__ */
43 #endif /* HAVE_LINUX_SOUNDCARD_H */
45 #define MIXER_DEV "/dev/mixer"
48 static const char *devs[] = SOUND_DEVICE_NAMES;
50 int mixer_init(const char *name)
54 if (name == 0 || name[0] == '\0') {
60 mixer_fd = open(MIXER_DEV, O_RDONLY);
62 ERR("can't open %s: %s", MIXER_DEV, strerror(errno));
67 for (i = 0; i < sizeof(devs) / sizeof(const char *); i++) {
68 if (strcasecmp(devs[i], name) == 0) {
76 static int mixer_get(int i)
81 if (ioctl(mixer_fd, MIXER_READ(i), &val) == -1) {
83 ERR("mixer ioctl: %s", strerror(errno));
93 int mixer_get_avg(int i)
97 return ((v >> 8) + (v & 0xFF)) / 2;
100 int mixer_get_left(int i)
102 return mixer_get(i) >> 8;
105 int mixer_get_right(int i)
107 return mixer_get(i) & 0xFF;