mirror of
https://github.com/Llewellynvdm/conky.git
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bb74efed2e
git-svn-id: https://conky.svn.sourceforge.net/svnroot/conky/trunk/conky1@1263 7f574dfc-610e-0410-a909-a81674777703
108 lines
2.3 KiB
C
108 lines
2.3 KiB
C
/* Conky, a system monitor, based on torsmo
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*
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* Any original torsmo code is licensed under the BSD license
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*
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* All code written since the fork of torsmo is licensed under the GPL
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*
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* Please see COPYING for details
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*
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* Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
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* Copyright (c) 2005-2008 Brenden Matthews, Philip Kovacs, et. al.
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* (see AUTHORS)
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* All rights reserved.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* $Id$ */
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#include "conky.h"
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#include <sys/ioctl.h>
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#include <errno.h>
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#include <fcntl.h>
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#ifdef HAVE_LINUX_SOUNDCARD_H
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#include <linux/soundcard.h>
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#else
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#ifdef __OpenBSD__
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#include <soundcard.h>
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#else
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#include <sys/soundcard.h>
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#endif /* __OpenBSD__ */
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#endif /* HAVE_LINUX_SOUNDCARD_H */
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#define MIXER_DEV "/dev/mixer"
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static int mixer_fd;
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static const char *devs[] = SOUND_DEVICE_NAMES;
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int mixer_init(const char *name)
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{
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unsigned int i;
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if (name == 0 || name[0] == '\0') {
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name = "vol";
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}
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/* open mixer */
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if (mixer_fd <= 0) {
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mixer_fd = open(MIXER_DEV, O_RDONLY);
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if (mixer_fd == -1) {
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ERR("can't open %s: %s", MIXER_DEV, strerror(errno));
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return -1;
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}
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}
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for (i = 0; i < sizeof(devs) / sizeof(const char *); i++) {
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if (strcasecmp(devs[i], name) == 0) {
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return i;
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}
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}
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return -1;
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}
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static int mixer_get(int i)
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{
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static char rep = 0;
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int val = -1;
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if (ioctl(mixer_fd, MIXER_READ(i), &val) == -1) {
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if (!rep) {
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ERR("mixer ioctl: %s", strerror(errno));
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}
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rep = 1;
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return 0;
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}
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rep = 0;
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return val;
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}
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int mixer_get_avg(int i)
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{
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int v = mixer_get(i);
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return ((v >> 8) + (v & 0xFF)) / 2;
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}
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int mixer_get_left(int i)
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{
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return mixer_get(i) >> 8;
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}
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int mixer_get_right(int i)
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{
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return mixer_get(i) & 0xFF;
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}
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