Desktop
/* $Id: volume.c,v 1.6 2010/01/29 15:08:19 khorben Exp $ */
/* Copyright (c) 2010 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/>. */
/* TODO:
* - add a timeout handler monitoring the volume if it changes */
#include <sys/ioctl.h>
#ifdef __NetBSD__
# include <sys/audioio.h>
#else
# include <sys/soundcard.h>
#endif
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#ifdef DEBUG
# include <stdio.h>
#endif
#include "Panel.h"
/* Volume */
/* private */
/* prototypes */
static GtkWidget * _volume_init(PanelApplet * applet);
static void _volume_destroy(PanelApplet * applet);
/* public */
/* variables */
PanelApplet applet =
{
NULL,
_volume_init,
_volume_destroy,
PANEL_APPLET_POSITION_END,
FALSE,
TRUE,
NULL
};
/* private */
/* types */
typedef struct _Volume
{
PanelAppletHelper * helper;
#ifdef AUDIO_MIXER_DEVINFO
int fd;
int mix;
int outputs;
#else
int fd;
#endif
} Volume;
/* prototypes */
static Volume * _volume_new(PanelAppletHelper * helper);
static void _volume_delete(Volume * volume);
static gdouble _volume_get(Volume * volume);
static int _volume_set(Volume * volume, gdouble value);
#ifdef AUDIO_MIXER_DEVINFO
static int _volume_match(Volume * volume, mixer_devinfo_t * md);
#endif
/* callbacks */
static void _on_value_changed(GtkWidget * widget, gdouble value, gpointer data);
/* functions */
/* volume_init */
static GtkWidget * _volume_init(PanelApplet * applet)
{
#if GTK_CHECK_VERSION(2, 12, 0)
GtkWidget * ret;
Volume * volume;
gdouble value;
if((volume = _volume_new(applet->helper)) == NULL)
return NULL;
ret = gtk_volume_button_new();
value = _volume_get(volume);
gtk_scale_button_set_value(GTK_SCALE_BUTTON(ret), value);
_volume_set(volume, value);
g_signal_connect(G_OBJECT(ret), "value-changed", G_CALLBACK(
_on_value_changed), volume);
gtk_widget_show_all(ret);
return ret;
#else
return NULL;
#endif
}
/* volume_destroy */
static void _volume_destroy(PanelApplet * applet)
{
Volume * volume = applet->priv;
_volume_delete(volume);
}
/* volume_new */
static Volume * _volume_new(PanelAppletHelper * helper)
{
Volume * volume;
char const mixer[] = "/dev/mixer";
#ifdef AUDIO_MIXER_DEVINFO
int i;
mixer_devinfo_t md;
#endif
if((volume = malloc(sizeof(*volume))) == NULL)
{
helper->error(helper->priv, "malloc", 0);
return NULL;
}
volume->helper = helper;
#ifdef AUDIO_MIXER_DEVINFO
volume->mix = -1;
volume->outputs = -1;
if((volume->fd = open(mixer, O_RDWR)) < 0)
{
helper->error(helper->priv, mixer, 0);
return volume;
}
for(i = 0; volume->outputs == -1 || volume->mix == -1; i++)
{
md.index = i;
if(ioctl(volume->fd, AUDIO_MIXER_DEVINFO, &md) < 0)
break;
if(md.type != AUDIO_MIXER_CLASS)
continue;
if(strcmp(md.label.name, AudioCoutputs) == 0)
volume->outputs = i;
else if(strcmp(md.label.name, "mix") == 0)
volume->mix = i;
}
#else
if((volume->fd = open(mixer, O_RDWR)) < 0)
helper->error(helper->priv, mixer, 0);
#endif
return volume;
}
/* volume_delete */
static void _volume_delete(Volume * volume)
{
#ifdef AUDIO_MIXER_DEVINFO
if(volume->fd >= 0 && close(volume->fd) != 0)
volume->helper->error(volume->helper->priv, "/dev/mixer", 0);
#else /* XXX equivalent for now */
if(volume->fd >= 0 && close(volume->fd) != 0)
volume->helper->error(volume->helper->priv, "/dev/mixer", 0);
#endif
free(volume);
}
/* accessors */
/* volume_get */
static gdouble _volume_get(Volume * volume)
{
gdouble ret = 0.0;
#ifdef AUDIO_MIXER_DEVINFO
mixer_devinfo_t md;
mixer_ctrl_t mc;
int i;
if(volume->fd < 0)
return ret;
if(volume->outputs < 0 && volume->mix < 0)
return ret;
for(i = 0;; i++)
{
md.index = i;
if(ioctl(volume->fd, AUDIO_MIXER_DEVINFO, &md) < 0)
{
volume->helper->error(NULL, "AUDIO_MIXER_DEVINFO", 0);
break;
}
if(_volume_match(volume, &md) != 1)
continue;
mc.dev = i;
mc.type = AUDIO_MIXER_VALUE;
mc.un.value.num_channels = md.un.v.num_channels;
if(ioctl(volume->fd, AUDIO_MIXER_READ, &mc) < 0)
volume->helper->error(volume->helper->priv,
"AUDIO_MIXER_READ", 0);
else
ret = mc.un.value.level[0] / 255.0;
break;
}
#else
int value;
if(volume->fd < 0)
return ret;
if(ioctl(volume->fd, MIXER_READ(SOUND_MIXER_VOLUME), &value) < 0)
volume->helper->error(volume->helper->priv, "MIXER_READ", 0);
else
ret = ((value & 0xff) + ((value & 0xff00) >> 8)) / 200.0;
#endif
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() => %lf\n", __func__, ret);
#endif
return ret;
}
/* volume_set */
int _volume_set(Volume * volume, gdouble value)
{
int ret = 0;
#ifdef AUDIO_MIXER_DEVINFO
mixer_devinfo_t md;
mixer_ctrl_t mc;
int i;
int j;
# ifdef DEBUG
fprintf(stderr, "DEBUG: %s(%lf)\n", __func__, value);
# endif
if(volume->fd < 0)
return 1;
if(volume->outputs < 0 && volume->mix < 0)
return 1;
for(i = 0;; i++)
{
md.index = i;
if(ioctl(volume->fd, AUDIO_MIXER_DEVINFO, &md) < 0)
break;
if(_volume_match(volume, &md) != 1)
continue;
mc.dev = i;
mc.type = AUDIO_MIXER_VALUE;
mc.un.value.num_channels = md.un.v.num_channels;
mc.un.value.level[0] = value * 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(volume->fd, AUDIO_MIXER_WRITE, &mc) < 0)
ret |= volume->helper->error(volume->helper->priv,
"AUDIO_MIXER_WRITE", 0);
break;
}
#else
int v = value * 100;
v |= v << 8;
# ifdef DEBUG
fprintf(stderr, "DEBUG: %s(%lf) 0x%04x\n", __func__, value, v);
# endif
if(ioctl(volume->fd, MIXER_WRITE(SOUND_MIXER_VOLUME), &v) < 0)
ret |= volume->helper->error(volume->helper->priv,
"MIXER_WRITE", 0);
#endif
return ret;
}
#ifdef AUDIO_MIXER_DEVINFO
/* volume_match */
static int _volume_match(Volume * volume, mixer_devinfo_t * md)
{
if(md->type != AUDIO_MIXER_VALUE)
return 0;
if(md->mixer_class == volume->mix /* mix.master */
&& strcmp(md->label.name, "master") == 0)
return 1;
if(md->mixer_class == volume->outputs /* outputs.lineout */
&& strcmp(md->label.name, "lineout") == 0)
return 1;
if(md->mixer_class == volume->outputs /* outputs.master */
|| strcmp(md->label.name, "master") == 0)
return 1;
return 0;
}
#endif
/* callbacks */
/* on_value_changed */
static void _on_value_changed(GtkWidget * widget, gdouble value, gpointer data)
{
Volume * volume = data;
_volume_set(volume, value);
}