Desktop
/* $Id: volume.c,v 1.2 2009/12/09 23:42:18 khorben Exp $ */
/* Copyright (c) 2009 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Desktop Panel */
/* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifdef __NetBSD__ /* XXX make it more portable */
# include <sys/audioio.h>
#else
# warning Unsupported platform
#endif
#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>
#include "Panel.h"
/* Volume */
/* private */
/* prototypes */
static GtkWidget * _volume_init(PanelApplet * applet);
/* public */
/* variables */
PanelApplet applet =
{
NULL,
_volume_init,
NULL,
PANEL_APPLET_POSITION_END,
FALSE,
TRUE,
NULL
};
/* private */
/* prototypes */
/* callbacks */
static void _on_value_changed(GtkWidget * widget, gdouble value, gpointer data);
/* functions */
/* volume_init */
static GtkWidget * _volume_init(PanelApplet * applet)
{
GtkWidget * ret;
ret = gtk_volume_button_new();
#if GTK_CHECK_VERSION(2, 12, 0)
gtk_widget_set_tooltip_text(ret, "Master volume");
#endif
/* FIXME set it to the current value first */
g_signal_connect(G_OBJECT(ret), "value-changed", G_CALLBACK(
_on_value_changed), NULL);
return ret;
}
/* callbacks */
/* on_value_changed */
static void _on_value_changed(GtkWidget * widget, gdouble value, gpointer data)
{
#ifdef AUDIO_MIXER_DEVINFO
int fd;
mixer_devinfo_t md;
mixer_ctrl_t mc;
int i;
int j;
int outputs = -1;
if((fd = open("/dev/mixer", O_RDWR)) < 0)
{
perror("/dev/mixer");
return;
}
for(i = 0;; i++)
{
md.index = i;
if(ioctl(fd, AUDIO_MIXER_DEVINFO, &md) < 0)
break;
if(md.type == AUDIO_MIXER_CLASS)
{
if(strcmp(md.label.name, "outputs") == 0)
outputs = i;
continue;
}
if(md.mixer_class != outputs || md.type != AUDIO_MIXER_VALUE)
continue;
if(strcmp(md.label.name, "lineout") != 0
&& strcmp(md.label.name, "master") != 0)
continue;
mc.dev = i;
mc.type = AUDIO_MIXER_VALUE;
mc.un.value.num_channels = md.un.v.num_channels;
mc.un.value.level[0] = gtk_scale_button_get_value(
GTK_SCALE_BUTTON(widget)) * 255;
for(j = 1; j < mc.un.value.num_channels; j++) /* XXX overflow */
mc.un.value.level[j] = mc.un.value.level[0];
if(ioctl(fd, AUDIO_MIXER_WRITE, &mc) < 0)
perror("AUDIO_MIXER_WRITE");
break;
}
close(fd);
#endif
}