Desktop
/* $Id: volume.c,v 1.24 2012/09/27 18:19:03 khorben Exp $ */
/* Copyright (c) 2011-2012 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 pulseaudio version */
#include <sys/ioctl.h>
#if defined(__NetBSD__) || defined(__sun__)
# include <sys/audioio.h>
#elif defined(__linux__)
# include <alsa/asoundlib.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 */
/* types */
typedef struct _PanelApplet
{
PanelAppletHelper * helper;
char const * device;
char const * control;
#if defined(AUDIO_MIXER_DEVINFO) /* audioio */
int fd;
int mix;
int outputs;
#elif defined(SND_LIB_MAJOR) /* Alsa */
snd_mixer_t * mixer;
snd_mixer_elem_t * mixer_elem;
long mixer_elem_max;
#else /* OSS */
int fd;
#endif
guint source;
/* widgets */
GtkWidget * widget;
GtkWidget * progress;
} Volume;
/* private */
/* prototypes */
static Volume * _volume_init(PanelAppletHelper * helper, GtkWidget ** widget);
static void _volume_destroy(Volume * volume);
/* public */
/* variables */
PanelAppletDefinition applet =
{
"Volume",
"stock_volume",
NULL,
_volume_init,
_volume_destroy,
NULL,
FALSE,
TRUE
};
/* 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(gpointer data);
static gboolean _on_volume_timeout(gpointer data);
/* functions */
/* volume_init */
static Volume * _volume_init(PanelAppletHelper * helper, GtkWidget ** widget)
{
#if GTK_CHECK_VERSION(2, 12, 0)
Volume * volume;
GtkWidget * vbox;
gdouble value;
if((volume = _volume_new(helper)) == NULL)
return NULL;
volume->helper = helper;
volume->widget = gtk_volume_button_new();
volume->progress = NULL;
g_object_set(G_OBJECT(volume->widget), "size", helper->icon_size, NULL);
if(helper->type == PANEL_APPLET_TYPE_NOTIFICATION)
{
vbox = gtk_vbox_new(FALSE, 4);
gtk_box_pack_start(GTK_BOX(vbox), volume->widget, TRUE, TRUE,
0);
volume->progress = gtk_progress_bar_new();
gtk_box_pack_start(GTK_BOX(vbox), volume->progress, TRUE, TRUE,
0);
*widget = vbox;
}
else
*widget = volume->widget;
if((value = _volume_get(volume)) >= 0.0)
{
gtk_scale_button_set_value(GTK_SCALE_BUTTON(volume->widget),
value);
if(volume->progress != NULL)
gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(
volume->progress), value);
_volume_set(volume, value);
}
g_signal_connect_swapped(volume->widget, "value-changed", G_CALLBACK(
_on_value_changed), volume);
gtk_widget_show(volume->widget);
return volume;
#else
return NULL;
#endif
}
/* volume_destroy */
static void _volume_destroy(Volume * volume)
{
_volume_delete(volume);
}
/* volume_new */
static Volume * _volume_new(PanelAppletHelper * helper)
{
Volume * volume;
#if defined(AUDIO_MIXER_DEVINFO)
int i;
mixer_devinfo_t md;
#elif defined(SND_LIB_MAJOR)
int err;
snd_mixer_elem_t * elem = NULL;
long min;
#endif
if((volume = malloc(sizeof(*volume))) == NULL)
{
helper->error(helper->panel, "malloc", 1);
return NULL;
}
volume->helper = helper;
volume->device = helper->config_get(helper->panel, "volume", "device");
volume->control = helper->config_get(helper->panel, "volume",
"control");
volume->source = 0;
#if defined(AUDIO_MIXER_DEVINFO)
if(volume->device == NULL)
volume->device = "/dev/mixer";
volume->mix = -1;
volume->outputs = -1;
if((volume->fd = open(volume->device, O_RDWR)) < 0)
{
helper->error(helper->panel, volume->device, 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;
}
volume->source = g_timeout_add(500, _on_volume_timeout, volume);
#elif defined(SND_LIB_MAJOR)
if(volume->device == NULL)
volume->device = "hw:0";
if(volume->control == NULL)
volume->control = "Master";
if((err = snd_mixer_open(&volume->mixer, 0)) != 0
|| (err = snd_mixer_attach(volume->mixer,
volume->device)) != 0
|| (err = snd_mixer_selem_register(volume->mixer, NULL,
NULL)) != 0
|| (err = snd_mixer_load(volume->mixer)) != 0)
fprintf(stderr, "%s: %s: %s\n", "Panel", volume->device,
snd_strerror(err));
else
for(elem = snd_mixer_first_elem(volume->mixer); elem != NULL;
elem = snd_mixer_elem_next(elem))
if(strcmp(snd_mixer_selem_get_name(elem),
volume->control) == 0)
break;
if((volume->mixer_elem = elem) != NULL
&& snd_mixer_selem_get_playback_volume_range(
volume->mixer_elem, &min,
&volume->mixer_elem_max) == 0)
volume->source = g_timeout_add(500, _on_volume_timeout, volume);
else
volume->mixer_elem = NULL;
#else
if(volume->device == NULL)
volume->device = "/dev/mixer";
if((volume->fd = open(volume->device, O_RDWR)) < 0)
helper->error(helper->panel, volume->device, 0);
else
volume->source = g_timeout_add(500, _on_volume_timeout, volume);
#endif
return volume;
}
/* volume_delete */
static void _volume_delete(Volume * volume)
{
if(volume->source != 0)
g_source_remove(volume->source);
#if defined(AUDIO_MIXER_DEVINFO)
if(volume->fd >= 0 && close(volume->fd) != 0)
volume->helper->error(volume->helper->panel, volume->device, 1);
#elif defined(SND_LIB_MAJOR)
if(volume->mixer != NULL)
snd_mixer_close(volume->mixer);
#else /* XXX equivalent for now */
if(volume->fd >= 0 && close(volume->fd) != 0)
volume->helper->error(volume->helper->panel, volume->device, 1);
#endif
free(volume);
}
/* accessors */
/* volume_get */
static gdouble _volume_get(Volume * volume)
{
PanelAppletHelper * helper = volume->helper;
gdouble ret = -1.0;
#if defined(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)
{
helper->error(NULL, "AUDIO_MIXER_DEVINFO", 1);
close(volume->fd);
volume->fd = -1;
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)
helper->error(helper->panel, "AUDIO_MIXER_READ", 1);
else
ret = mc.un.value.level[0] / 255.0;
break;
}
#elif defined(SND_LIB_MAJOR)
long value;
if(volume->mixer_elem == NULL)
return ret;
if(snd_mixer_selem_get_playback_volume(volume->mixer_elem,
SND_MIXER_SCHN_FRONT_LEFT, &value) != 0)
return ret;
ret = value;
ret /= volume->mixer_elem_max;
#else
int value;
if(volume->fd < 0)
return ret;
if(ioctl(volume->fd, MIXER_READ(SOUND_MIXER_VOLUME), &value) < 0)
{
helper->error(NULL, "MIXER_READ", 1);
close(volume->fd);
volume->fd = -1;
}
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;
PanelAppletHelper * helper = volume->helper;
#if defined(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;
/* FIXME use volume->control */
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 |= helper->error(helper->panel, "AUDIO_MIXER_WRITE",
1);
break;
}
#elif defined(SND_LIB_MAJOR)
long v = value * volume->mixer_elem_max;
if(volume->mixer_elem == NULL)
return 0;
snd_mixer_selem_set_playback_volume_all(volume->mixer_elem, v);
#else
int v = value * 100;
if(volume->fd < 0)
return 1;
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 |= helper->error(helper->panel, "MIXER_WRITE", 1);
#endif
return ret;
}
#if defined(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(gpointer data)
{
Volume * volume = data;
gdouble value;
value = gtk_scale_button_get_value(GTK_SCALE_BUTTON(volume->widget));
_volume_set(volume, value);
}
/* on_volume_timeout */
static gboolean _on_volume_timeout(gpointer data)
{
Volume * volume = data;
gdouble value;
if((value = _volume_get(volume)) < 0.0)
{
volume->source = 0;
return FALSE;
}
gtk_scale_button_set_value(GTK_SCALE_BUTTON(volume->widget), value);
if(volume->progress)
gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(
volume->progress), value);
return TRUE;
}