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/*
* Copyright (C) 2014 Alex Murray <murray.alex@gmail.com>
*
* indicator-sensors 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, either version 3 of the License, or
* (at your option) any later version.
*
* indicator-sensors 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 indicator-sensors. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "is-dynamic-plugin.h"
#include <stdlib.h>
#include <math.h>
#include <inttypes.h>
#include <indicator-sensors/is-application.h>
#include <indicator-sensors/is-manager.h>
#include <indicator-sensors/is-log.h>
#include <glib/gi18n.h>
static void peas_activatable_iface_init(PeasActivatableInterface *iface);
G_DEFINE_DYNAMIC_TYPE_EXTENDED(IsDynamicPlugin,
is_dynamic_plugin,
PEAS_TYPE_EXTENSION_BASE,
0,
G_IMPLEMENT_INTERFACE_DYNAMIC(PEAS_TYPE_ACTIVATABLE,
peas_activatable_iface_init));
#define DYNAMIC_RATE_DATA_KEY "dynamic-rate-data"
#define DYNAMIC_SENSOR_PATH "virtual/dynamic"
#define EWMA_ALPHA 0.2
enum
{
PROP_OBJECT = 1,
};
struct _IsDynamicPluginPrivate
{
IsApplication *application;
IsSensor *sensor;
IsSensor *max;
gdouble max_rate;
};
typedef struct _RateData
{
gdouble rate;
gdouble last_value;
gint64 last_time;
} RateData;
static void is_dynamic_plugin_finalize(GObject *object);
static void
is_dynamic_plugin_set_property(GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
IsDynamicPlugin *plugin = IS_DYNAMIC_PLUGIN(object);
switch (prop_id)
{
case PROP_OBJECT:
plugin->priv->application = IS_APPLICATION(g_value_dup_object(value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void
is_dynamic_plugin_get_property(GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
IsDynamicPlugin *plugin = IS_DYNAMIC_PLUGIN(object);
switch (prop_id)
{
case PROP_OBJECT:
g_value_set_object(value, plugin->priv->application);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void
is_dynamic_plugin_init(IsDynamicPlugin *self)
{
IsDynamicPluginPrivate *priv =
G_TYPE_INSTANCE_GET_PRIVATE(self, IS_TYPE_DYNAMIC_PLUGIN,
IsDynamicPluginPrivate);
self->priv = priv;
}
static void
is_dynamic_plugin_finalize(GObject *object)
{
IsDynamicPlugin *self = (IsDynamicPlugin *)object;
IsDynamicPluginPrivate *priv = self->priv;
(void)priv;
G_OBJECT_CLASS(is_dynamic_plugin_parent_class)->finalize(object);
}
static void
update_sensor_from_max(IsDynamicPlugin *self)
{
IsDynamicPluginPrivate *priv;
gchar *label;
priv = self->priv;
label = g_strdup_printf("Δ%s", is_sensor_get_label(priv->max));
is_sensor_set_label(priv->sensor, label);
is_sensor_set_icon(priv->sensor, is_sensor_get_icon(priv->max));
is_sensor_set_value(priv->sensor, is_sensor_get_value(priv->max));
is_sensor_set_units(priv->sensor, is_sensor_get_units(priv->max));
is_sensor_set_digits(priv->sensor, is_sensor_get_digits(priv->max));
g_free(label);
}
static void
on_sensor_value_notify(IsSensor *sensor,
GParamSpec *pspec,
gpointer user_data)
{
IsDynamicPlugin *self;
IsDynamicPluginPrivate *priv;
RateData *data;
gdouble value, dv, dt, rate;
gint64 now;
self = IS_DYNAMIC_PLUGIN(user_data);
priv = self->priv;
value = is_sensor_get_value(sensor);
if (value - IS_SENSOR_VALUE_UNSET <= DBL_EPSILON)
{
is_debug("dynamic", "sensor value for sensor %s is unset - ignoring",
is_sensor_get_label(sensor));
goto exit;
}
now = g_get_monotonic_time();
data = g_object_get_data(G_OBJECT(sensor), DYNAMIC_RATE_DATA_KEY);
if (data == NULL)
{
is_debug("dynamic", "Creating new dynamic rate data for sensor: %s",
is_sensor_get_label(sensor));
// allocate data
data = g_malloc0(sizeof(*data));
data->rate = 0.0f;
data->last_value = value;
data->last_time = now;
g_object_set_data_full(G_OBJECT(sensor), DYNAMIC_RATE_DATA_KEY,
data, g_free);
goto exit;
}
is_debug("dynamic", "Got existing rate data for sensor: %s - rate: %f, last_value %f, last_time %"PRId64"",
is_sensor_get_label(sensor),
data->rate,
data->last_value,
data->last_time);
dv = value - data->last_value;
dt = ((double)(now - data->last_time) /
(double)G_USEC_PER_SEC);
// convert rate to units per second
rate = fabs(dv / dt);
is_debug("dynamic", "abs rate of change of sensor %s: %f (t0: %f, t-1: %f, dv: %f, dt: %f)",
is_sensor_get_label(sensor), rate, value, data->last_value,
dv, dt);
// calculate exponentially weighted moving average of rate
rate = (EWMA_ALPHA * rate) + ((1 - EWMA_ALPHA) * data->rate);
data->rate = rate;
data->last_value = value;
data->last_time = now;
is_debug("dynamic", "EWMA abs rate of change of sensor %s: %f",
is_sensor_get_label(sensor), rate);
if (rate > priv->max_rate && sensor != priv->max)
{
// let's see if we can get away without taking a reference on sensor
priv->max = sensor;
is_message("dynamic", "New highest EWMA rate sensor: %s (rate %f)",
is_sensor_get_label(sensor), rate);
}
if (sensor == priv->max)
{
priv->max_rate = rate;
update_sensor_from_max(self);
}
exit:
return;
}
static void
on_sensor_enabled(IsManager *manager,
IsSensor *sensor,
gint index,
gpointer data)
{
IsDynamicPlugin *self = (IsDynamicPlugin *)data;
// don't bother monitoring non-temperature sensors
if (IS_IS_TEMPERATURE_SENSOR(sensor))
{
is_debug("dynamic", "sensor enabled: %s", is_sensor_get_label(sensor));
on_sensor_value_notify(sensor, NULL, self);
g_signal_connect(sensor, "notify::value",
G_CALLBACK(on_sensor_value_notify), self);
}
}
static void
on_sensor_disabled(IsManager *manager,
IsSensor *sensor,
gpointer data)
{
IsDynamicPlugin *self = (IsDynamicPlugin *)data;
IsDynamicPluginPrivate *priv = self->priv;
// don't bother monitoring non-temperature sensors
if (IS_IS_TEMPERATURE_SENSOR(sensor))
{
is_debug("dynamic", "sensor disabled: %s", is_sensor_get_label(sensor));
g_signal_handlers_disconnect_by_func(sensor,
G_CALLBACK(on_sensor_value_notify),
self);
if (priv->max == sensor)
{
// get all sensors and find the one with the maximum rate and switch to
// this
GSList *sensors, *_list;
priv->max = NULL;
priv->max_rate = 0.0;
is_sensor_set_label(priv->sensor, "Δ");
is_sensor_set_icon(priv->sensor, IS_STOCK_CHIP);
is_sensor_set_value(priv->sensor, 0.0);
is_sensor_set_units(priv->sensor, "");
is_sensor_set_digits(priv->sensor, 1);
sensors = is_manager_get_enabled_sensors_list(manager);
for (_list = sensors;
_list != NULL;
_list = _list->next)
{
if (IS_IS_TEMPERATURE_SENSOR(_list->data))
{
on_sensor_value_notify(IS_SENSOR(_list->data), NULL, self);
}
}
}
}
}
static void
is_dynamic_plugin_activate(PeasActivatable *activatable)
{
IsDynamicPlugin *self = IS_DYNAMIC_PLUGIN(activatable);
IsDynamicPluginPrivate *priv = self->priv;
IsManager *manager;
GSList *sensors, *_list;
int i = 0;
manager = is_application_get_manager(priv->application);
// create our virtual sensor which mimics the current highest rate of change
// sensor's value and label
is_debug("dynamic", "creating virtual sensor");
priv->sensor = is_sensor_new(DYNAMIC_SENSOR_PATH);
is_sensor_set_label(priv->sensor, "Δ");
is_sensor_set_icon(priv->sensor, IS_STOCK_CHIP);
is_sensor_set_value(priv->sensor, 0.0);
is_sensor_set_units(priv->sensor, "");
is_sensor_set_digits(priv->sensor, 1);
is_manager_add_sensor(manager, priv->sensor);
is_debug("dynamic", "attaching to signals");
sensors = is_manager_get_enabled_sensors_list(manager);
for (_list = sensors;
_list != NULL;
_list = _list->next)
{
IsSensor *sensor = IS_SENSOR(_list->data);
on_sensor_enabled(manager, sensor, i, self);
g_object_unref(sensor);
i++;
}
g_slist_free(sensors);
g_signal_connect(manager, "sensor-enabled",
G_CALLBACK(on_sensor_enabled), self);
g_signal_connect(manager, "sensor-disabled",
G_CALLBACK(on_sensor_disabled), self);
}
static void
is_dynamic_plugin_deactivate(PeasActivatable *activatable)
{
IsDynamicPlugin *self = IS_DYNAMIC_PLUGIN(activatable);
IsDynamicPluginPrivate *priv = self->priv;
IsManager *manager;
GSList *sensors, *_list;
is_debug("dynamic", "dettaching from signals");
manager = is_application_get_manager(priv->application);
is_manager_remove_path(manager, DYNAMIC_SENSOR_PATH);
sensors = is_manager_get_enabled_sensors_list(manager);
for (_list = sensors;
_list != NULL;
_list = _list->next)
{
IsSensor *sensor = IS_SENSOR(_list->data);
on_sensor_disabled(manager, sensor, self);
g_object_unref(sensor);
}
g_slist_free(sensors);
g_signal_handlers_disconnect_by_func(manager,
G_CALLBACK(on_sensor_enabled), self);
g_signal_handlers_disconnect_by_func(manager,
G_CALLBACK(on_sensor_disabled), self);
}
static void
is_dynamic_plugin_class_init(IsDynamicPluginClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
g_type_class_add_private(klass, sizeof(IsDynamicPluginPrivate));
gobject_class->get_property = is_dynamic_plugin_get_property;
gobject_class->set_property = is_dynamic_plugin_set_property;
gobject_class->finalize = is_dynamic_plugin_finalize;
g_object_class_override_property(gobject_class, PROP_OBJECT, "object");
}
static void
peas_activatable_iface_init(PeasActivatableInterface *iface)
{
iface->activate = is_dynamic_plugin_activate;
iface->deactivate = is_dynamic_plugin_deactivate;
}
static void
is_dynamic_plugin_class_finalize(IsDynamicPluginClass *klass)
{
/* nothing to do */
}
G_MODULE_EXPORT void
peas_register_types(PeasObjectModule *module)
{
is_dynamic_plugin_register_type(G_TYPE_MODULE(module));
peas_object_module_register_extension_type(module,
PEAS_TYPE_ACTIVATABLE,
IS_TYPE_DYNAMIC_PLUGIN);
}
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