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Diffstat (limited to 'libs/gst/controller/gstcontroller.c')
| -rw-r--r-- | libs/gst/controller/gstcontroller.c | 959 |
1 files changed, 0 insertions, 959 deletions
diff --git a/libs/gst/controller/gstcontroller.c b/libs/gst/controller/gstcontroller.c deleted file mode 100644 index 10f3d65..0000000 --- a/libs/gst/controller/gstcontroller.c +++ /dev/null @@ -1,959 +0,0 @@ -/* GStreamer - * - * Copyright (C) <2005> Stefan Kost <ensonic at users dot sf dot net> - * Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org> - * - * gstcontroller.c: dynamic parameter control subsystem - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library 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 - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -/** - * SECTION:gstcontroller - * @short_description: dynamic parameter control subsystem - * - * The controller subsystem offers a lightweight way to adjust gobject - * properties over stream-time. It works by using time-stamped value pairs that - * are queued for element-properties. At run-time the elements continously pull - * values changes for the current stream-time. - * - * What needs to be changed in a #GstElement? - * Very little - it is just two steps to make a plugin controllable! - * <orderedlist> - * <listitem><para> - * mark gobject-properties paramspecs that make sense to be controlled, - * by GST_PARAM_CONTROLLABLE. - * </para></listitem> - * <listitem><para> - * when processing data (get, chain, loop function) at the beginning call - * gst_object_sync_values(element,timestamp). - * This will made the controller to update all gobject properties that are under - * control with the current values based on timestamp. - * </para></listitem> - * </orderedlist> - * - * What needs to be done in applications? - * Again its not a lot to change. - * <orderedlist> - * <listitem><para> - * first put some properties under control, by calling - * controller = gst_object_control_properties (object, "prop1", "prop2",...); - * </para></listitem> - * <listitem><para> - * Get a #GstControlSource for the property and set it up. - * csource = gst_interpolation_control_source_new (); - * gst_interpolation_control_source_set_interpolation_mode(csource, mode); - * gst_interpolation_control_source_set (csource,0 * GST_SECOND, value1); - * gst_interpolation_control_source_set (csource,1 * GST_SECOND, value2); - * </para></listitem> - * <listitem><para> - * Set the #GstControlSource in the controller. - * gst_controller_set_control_source (controller, "prop1", csource); - * </para></listitem> - * <listitem><para> - * start your pipeline - * </para></listitem> - * </orderedlist> - */ - -#ifdef HAVE_CONFIG_H -# include "config.h" -#endif - -#include "gstcontroller.h" -#include "gstcontrollerprivate.h" -#include "gstcontrolsource.h" -#include "gstinterpolationcontrolsource.h" - -#define GST_CAT_DEFAULT controller_debug -GST_DEBUG_CATEGORY_EXTERN (GST_CAT_DEFAULT); - -static GObjectClass *parent_class = NULL; -GQuark priv_gst_controller_key; - -/* property ids */ -enum -{ - PROP_CONTROL_RATE = 1 -}; - -struct _GstControllerPrivate -{ - GstClockTime control_rate; - GstClockTime last_sync; -}; - -/* helper */ - -/* - * gst_controlled_property_new: - * @object: for which object the controlled property should be set up - * @name: the name of the property to be controlled - * - * Private method which initializes the fields of a new controlled property - * structure. - * - * Returns: a freshly allocated structure or %NULL - */ -static GstControlledProperty * -gst_controlled_property_new (GObject * object, const gchar * name) -{ - GstControlledProperty *prop = NULL; - GParamSpec *pspec; - - GST_INFO ("trying to put property '%s' under control", name); - - /* check if the object has a property of that name */ - if ((pspec = - g_object_class_find_property (G_OBJECT_GET_CLASS (object), name))) { - GST_DEBUG (" psec->flags : 0x%08x", pspec->flags); - - /* check if this param is witable && controlable && !construct-only */ - g_return_val_if_fail ((pspec->flags & (G_PARAM_WRITABLE | - GST_PARAM_CONTROLLABLE | G_PARAM_CONSTRUCT_ONLY)) == - (G_PARAM_WRITABLE | GST_PARAM_CONTROLLABLE), NULL); - - if ((prop = g_slice_new (GstControlledProperty))) { - prop->pspec = pspec; - prop->name = pspec->name; - prop->csource = NULL; - prop->disabled = FALSE; - memset (&prop->last_value, 0, sizeof (GValue)); - g_value_init (&prop->last_value, G_PARAM_SPEC_VALUE_TYPE (prop->pspec)); - } - } else { - GST_WARNING ("class '%s' has no property '%s'", G_OBJECT_TYPE_NAME (object), - name); - } - return prop; -} - -/* - * gst_controlled_property_free: - * @prop: the object to free - * - * Private method which frees all data allocated by a #GstControlledProperty - * instance. - */ -static void -gst_controlled_property_free (GstControlledProperty * prop) -{ - if (prop->csource) - g_object_unref (prop->csource); - g_value_unset (&prop->last_value); - g_slice_free (GstControlledProperty, prop); -} - -/* - * gst_controller_find_controlled_property: - * @self: the controller object to search for a property in - * @name: the gobject property name to look for - * - * Searches the list of properties under control. - * - * Returns: a #GstControlledProperty object of %NULL if the property is not - * being controlled. - */ -static GstControlledProperty * -gst_controller_find_controlled_property (GstController * self, - const gchar * name) -{ - GstControlledProperty *prop; - GList *node; - - for (node = self->properties; node; node = g_list_next (node)) { - prop = node->data; - /* FIXME: eventually use GQuark to speed it up */ - if (!strcmp (prop->name, name)) { - return prop; - } - } - GST_DEBUG ("controller does not (yet) manage property '%s'", name); - - return NULL; -} - -/* - * gst_controller_add_property: - * @self: the controller object or %NULL if none yet exists - * @object: object to bind the property - * @name: name of projecty in @object - * @ref_existing: pointer to flag that tracks if we need to ref an existing - * controller still - * - * Creates a new #GstControlledProperty if there is none for property @name yet. - * In case this is the first controlled propery, it creates the controller as - * well. - * - * Returns: a newly created controller object or reffed existing one with the - * given property bound. - */ -static GstController * -gst_controller_add_property (GstController * self, GObject * object, - const gchar * name, gboolean * ref_existing) -{ - /* test if this property isn't yet controlled */ - if (!self || !gst_controller_find_controlled_property (self, name)) { - GstControlledProperty *prop; - - /* create GstControlledProperty and add to self->propeties List */ - if ((prop = gst_controlled_property_new (object, name))) { - /* if we don't have a controller object yet, now is the time to create one */ - if (!self) { - self = g_object_newv (GST_TYPE_CONTROLLER, 0, NULL); - self->object = g_object_ref (object); - /* store the controller */ - g_object_set_qdata (object, priv_gst_controller_key, self); - *ref_existing = FALSE; - } else { - /* only want one single _ref(), even for multiple properties */ - if (*ref_existing) { - g_object_ref (self); - *ref_existing = FALSE; - GST_INFO ("returning existing controller"); - } - } - self->properties = g_list_prepend (self->properties, prop); - } - } else { - GST_WARNING ("trying to control property %s again", name); - if (*ref_existing) { - g_object_ref (self); - *ref_existing = FALSE; - } - } - return self; -} - -/* methods */ - -/** - * gst_controller_new_valist: - * @object: the object of which some properties should be controlled - * @var_args: %NULL terminated list of property names that should be controlled - * - * Creates a new GstController for the given object's properties - * - * Returns: the new controller. - */ -GstController * -gst_controller_new_valist (GObject * object, va_list var_args) -{ - GstController *self; - gboolean ref_existing = TRUE; - gchar *name; - - g_return_val_if_fail (G_IS_OBJECT (object), NULL); - - GST_INFO ("setting up a new controller"); - - self = g_object_get_qdata (object, priv_gst_controller_key); - /* create GstControlledProperty for each property */ - while ((name = va_arg (var_args, gchar *))) { - self = gst_controller_add_property (self, object, name, &ref_existing); - } - va_end (var_args); - - if (self) - GST_INFO ("controller->ref_count=%d", G_OBJECT (self)->ref_count); - return self; -} - -/** - * gst_controller_new_list: - * @object: the object of which some properties should be controlled - * @list: list of property names that should be controlled - * - * Creates a new GstController for the given object's properties - * - * Returns: the new controller. - */ -GstController * -gst_controller_new_list (GObject * object, GList * list) -{ - GstController *self; - gboolean ref_existing = TRUE; - gchar *name; - GList *node; - - g_return_val_if_fail (G_IS_OBJECT (object), NULL); - - GST_INFO ("setting up a new controller"); - - self = g_object_get_qdata (object, priv_gst_controller_key); - /* create GstControlledProperty for each property */ - for (node = list; node; node = g_list_next (node)) { - name = (gchar *) node->data; - self = gst_controller_add_property (self, object, name, &ref_existing); - } - - if (self) - GST_INFO ("controller->ref_count=%d", G_OBJECT (self)->ref_count); - return self; -} - -/** - * gst_controller_new: - * @object: the object of which some properties should be controlled - * @...: %NULL terminated list of property names that should be controlled - * - * Creates a new GstController for the given object's properties - * - * Returns: the new controller. - */ -GstController * -gst_controller_new (GObject * object, ...) -{ - GstController *self; - va_list var_args; - - g_return_val_if_fail (G_IS_OBJECT (object), NULL); - - va_start (var_args, object); - self = gst_controller_new_valist (object, var_args); - va_end (var_args); - - return self; -} - -/** - * gst_controller_remove_properties_valist: - * @self: the controller object from which some properties should be removed - * @var_args: %NULL terminated list of property names that should be removed - * - * Removes the given object properties from the controller - * - * Returns: %FALSE if one of the given property isn't handled by the controller, %TRUE otherwise - */ -gboolean -gst_controller_remove_properties_valist (GstController * self, va_list var_args) -{ - gboolean res = TRUE; - GstControlledProperty *prop; - gchar *name; - - g_return_val_if_fail (GST_IS_CONTROLLER (self), FALSE); - - while ((name = va_arg (var_args, gchar *))) { - /* find the property in the properties list of the controller, remove and free it */ - g_mutex_lock (self->lock); - if ((prop = gst_controller_find_controlled_property (self, name))) { - self->properties = g_list_remove (self->properties, prop); - //g_signal_handler_disconnect (self->object, prop->notify_handler_id); - gst_controlled_property_free (prop); - } else { - res = FALSE; - } - g_mutex_unlock (self->lock); - } - - return res; -} - -/** - * gst_controller_remove_properties_list: - * @self: the controller object from which some properties should be removed - * @list: #GList of property names that should be removed - * - * Removes the given object properties from the controller - * - * Returns: %FALSE if one of the given property isn't handled by the controller, %TRUE otherwise - */ -gboolean -gst_controller_remove_properties_list (GstController * self, GList * list) -{ - gboolean res = TRUE; - GstControlledProperty *prop; - gchar *name; - GList *tmp; - - g_return_val_if_fail (GST_IS_CONTROLLER (self), FALSE); - - for (tmp = list; tmp; tmp = g_list_next (tmp)) { - name = (gchar *) tmp->data; - - /* find the property in the properties list of the controller, remove and free it */ - g_mutex_lock (self->lock); - if ((prop = gst_controller_find_controlled_property (self, name))) { - self->properties = g_list_remove (self->properties, prop); - //g_signal_handler_disconnect (self->object, prop->notify_handler_id); - gst_controlled_property_free (prop); - } else { - res = FALSE; - } - g_mutex_unlock (self->lock); - } - - return res; -} - -/** - * gst_controller_remove_properties: - * @self: the controller object from which some properties should be removed - * @...: %NULL terminated list of property names that should be removed - * - * Removes the given object properties from the controller - * - * Returns: %FALSE if one of the given property isn't handled by the controller, %TRUE otherwise - */ -gboolean -gst_controller_remove_properties (GstController * self, ...) -{ - gboolean res; - va_list var_args; - - g_return_val_if_fail (GST_IS_CONTROLLER (self), FALSE); - - va_start (var_args, self); - res = gst_controller_remove_properties_valist (self, var_args); - va_end (var_args); - - return res; -} - -/** - * gst_controller_set_property_disabled: - * @self: the #GstController which should be disabled - * @property_name: property to disable - * @disabled: boolean that specifies whether to disable the controller - * or not. - * - * This function is used to disable the #GstController on a property for - * some time, i.e. gst_controller_sync_values() will do nothing for the - * property. - * - * Since: 0.10.14 - */ - -void -gst_controller_set_property_disabled (GstController * self, - const gchar * property_name, gboolean disabled) -{ - GstControlledProperty *prop; - - g_return_if_fail (GST_IS_CONTROLLER (self)); - g_return_if_fail (property_name); - - g_mutex_lock (self->lock); - if ((prop = gst_controller_find_controlled_property (self, property_name))) { - prop->disabled = disabled; - } - g_mutex_unlock (self->lock); -} - - -/** - * gst_controller_set_disabled: - * @self: the #GstController which should be disabled - * @disabled: boolean that specifies whether to disable the controller - * or not. - * - * This function is used to disable all properties of the #GstController - * for some time, i.e. gst_controller_sync_values() will do nothing. - * - * Since: 0.10.14 - */ - -void -gst_controller_set_disabled (GstController * self, gboolean disabled) -{ - GList *node; - GstControlledProperty *prop; - - g_return_if_fail (GST_IS_CONTROLLER (self)); - - g_mutex_lock (self->lock); - for (node = self->properties; node; node = node->next) { - prop = node->data; - prop->disabled = disabled; - } - g_mutex_unlock (self->lock); -} - -/** - * gst_controller_set_control_source: - * @self: the controller object - * @property_name: name of the property for which the #GstControlSource should be set - * @csource: the #GstControlSource that should be used for the property - * - * Sets the #GstControlSource for @property_name. If there already was a #GstControlSource - * for this property it will be unreferenced. - * - * Returns: %FALSE if the given property isn't handled by the controller or the new #GstControlSource - * couldn't be bound to the property, %TRUE if everything worked as expected. - * - * Since: 0.10.14 - */ -gboolean -gst_controller_set_control_source (GstController * self, - const gchar * property_name, GstControlSource * csource) -{ - GstControlledProperty *prop; - gboolean ret = FALSE; - - g_mutex_lock (self->lock); - if ((prop = gst_controller_find_controlled_property (self, property_name))) { - GstControlSource *old = prop->csource; - - if (csource && (ret = gst_control_source_bind (csource, prop->pspec))) { - g_object_ref (csource); - prop->csource = csource; - } else if (!csource) { - ret = TRUE; - prop->csource = NULL; - } - - if (ret && old) - g_object_unref (old); - } - g_mutex_unlock (self->lock); - - return ret; -} - -/** - * gst_controller_get_control_source: - * @self: the controller object - * @property_name: name of the property for which the #GstControlSource should be get - * - * Gets the corresponding #GstControlSource for the property. This should be unreferenced - * again after use. - * - * Returns: the #GstControlSource for @property_name or NULL if the property is not - * controlled by this controller or no #GstControlSource was assigned yet. - * - * Since: 0.10.14 - */ -GstControlSource * -gst_controller_get_control_source (GstController * self, - const gchar * property_name) -{ - GstControlledProperty *prop; - GstControlSource *ret = NULL; - - g_return_val_if_fail (GST_IS_CONTROLLER (self), NULL); - g_return_val_if_fail (property_name, NULL); - - g_mutex_lock (self->lock); - if ((prop = gst_controller_find_controlled_property (self, property_name))) { - ret = prop->csource; - } - g_mutex_unlock (self->lock); - - if (ret) - g_object_ref (ret); - - return ret; -} - -/** - * gst_controller_get: - * @self: the controller object which handles the properties - * @property_name: the name of the property to get - * @timestamp: the time the control-change should be read from - * - * Gets the value for the given controller-handled property at the requested - * time. - * - * Returns: the GValue of the property at the given time, or %NULL if the - * property isn't handled by the controller - */ -GValue * -gst_controller_get (GstController * self, const gchar * property_name, - GstClockTime timestamp) -{ - GstControlledProperty *prop; - GValue *val = NULL; - - g_return_val_if_fail (GST_IS_CONTROLLER (self), NULL); - g_return_val_if_fail (property_name, NULL); - g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (timestamp), NULL); - - g_mutex_lock (self->lock); - if ((prop = gst_controller_find_controlled_property (self, property_name))) { - val = g_new0 (GValue, 1); - g_value_init (val, G_PARAM_SPEC_VALUE_TYPE (prop->pspec)); - if (prop->csource) { - gboolean res; - - /* get current value via control source */ - res = gst_control_source_get_value (prop->csource, timestamp, val); - if (!res) { - g_free (val); - val = NULL; - } - } else { - g_object_get_property (self->object, prop->name, val); - } - } - g_mutex_unlock (self->lock); - - return val; -} - -/** - * gst_controller_suggest_next_sync: - * @self: the controller that handles the values - * - * Returns a suggestion for timestamps where buffers should be split - * to get best controller results. - * - * Returns: Returns the suggested timestamp or %GST_CLOCK_TIME_NONE - * if no control-rate was set. - * - * Since: 0.10.13 - */ -GstClockTime -gst_controller_suggest_next_sync (GstController * self) -{ - GstClockTime ret; - - g_return_val_if_fail (GST_IS_CONTROLLER (self), GST_CLOCK_TIME_NONE); - g_return_val_if_fail (self->priv->control_rate != GST_CLOCK_TIME_NONE, - GST_CLOCK_TIME_NONE); - - g_mutex_lock (self->lock); - - /* TODO: Implement more logic, depending on interpolation mode - * and control points - * FIXME: we need playback direction - */ - ret = self->priv->last_sync + self->priv->control_rate; - - g_mutex_unlock (self->lock); - - return ret; -} - -/** - * gst_controller_sync_values: - * @self: the controller that handles the values - * @timestamp: the time that should be processed - * - * Sets the properties of the element, according to the controller that (maybe) - * handles them and for the given timestamp. - * - * If this function fails, it is most likely the application developers fault. - * Most probably the control sources are not setup correctly. - * - * Returns: %TRUE if the controller values could be applied to the object - * properties, %FALSE otherwise - */ -gboolean -gst_controller_sync_values (GstController * self, GstClockTime timestamp) -{ - GstControlledProperty *prop; - GList *node; - gboolean ret = TRUE, val_ret; - GValue value = { 0, }; - - g_return_val_if_fail (GST_IS_CONTROLLER (self), FALSE); - g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (timestamp), FALSE); - - GST_LOG ("sync_values"); - - g_mutex_lock (self->lock); - g_object_freeze_notify (self->object); - /* go over the controlled properties of the controller */ - for (node = self->properties; node; node = g_list_next (node)) { - prop = node->data; - - if (!prop->csource || prop->disabled) - continue; - - GST_LOG ("property '%s' at ts=%" G_GUINT64_FORMAT, prop->name, timestamp); - - /* we can make this faster - * http://bugzilla.gnome.org/show_bug.cgi?id=536939 - */ - g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (prop->pspec)); - val_ret = gst_control_source_get_value (prop->csource, timestamp, &value); - if (G_LIKELY (val_ret)) { - /* always set the value for first time, but then only if it changed - * this should limit g_object_notify invocations. - * FIXME: can we detect negative playback rates? - */ - if ((timestamp < self->priv->last_sync) || - gst_value_compare (&value, &prop->last_value) != GST_VALUE_EQUAL) { - g_object_set_property (self->object, prop->name, &value); - g_value_copy (&value, &prop->last_value); - } - } else { - GST_DEBUG ("no control value for param %s", prop->name); - } - g_value_unset (&value); - ret &= val_ret; - } - self->priv->last_sync = timestamp; - g_object_thaw_notify (self->object); - - g_mutex_unlock (self->lock); - - return ret; -} - -/** - * gst_controller_get_value_arrays: - * @self: the controller that handles the values - * @timestamp: the time that should be processed - * @value_arrays: list to return the control-values in - * - * Function to be able to get an array of values for one or more given element - * properties. - * - * All fields of the %GstValueArray in the list must be filled correctly. - * Especially the GstValueArray->values arrays must be big enough to keep - * the requested amount of values. - * - * The types of the values in the array are the same as the property's type. - * - * <note><para>This doesn't modify the controlled GObject properties!</para></note> - * - * Returns: %TRUE if the given array(s) could be filled, %FALSE otherwise - */ -gboolean -gst_controller_get_value_arrays (GstController * self, - GstClockTime timestamp, GSList * value_arrays) -{ - gboolean res = TRUE; - GSList *node; - - g_return_val_if_fail (GST_IS_CONTROLLER (self), FALSE); - g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (timestamp), FALSE); - g_return_val_if_fail (value_arrays, FALSE); - - for (node = value_arrays; (res && node); node = g_slist_next (node)) { - res = gst_controller_get_value_array (self, timestamp, node->data); - } - - return (res); -} - -/** - * gst_controller_get_value_array: - * @self: the controller that handles the values - * @timestamp: the time that should be processed - * @value_array: array to put control-values in - * - * Function to be able to get an array of values for one element property. - * - * All fields of @value_array must be filled correctly. Especially the - * @value_array->values array must be big enough to keep the requested amount - * of values (as indicated by the nbsamples field). - * - * The type of the values in the array is the same as the property's type. - * - * <note><para>This doesn't modify the controlled GObject property!</para></note> - * - * Returns: %TRUE if the given array could be filled, %FALSE otherwise - */ -gboolean -gst_controller_get_value_array (GstController * self, GstClockTime timestamp, - GstValueArray * value_array) -{ - gboolean res = FALSE; - GstControlledProperty *prop; - - g_return_val_if_fail (GST_IS_CONTROLLER (self), FALSE); - g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (timestamp), FALSE); - g_return_val_if_fail (value_array, FALSE); - g_return_val_if_fail (value_array->property_name, FALSE); - g_return_val_if_fail (value_array->values, FALSE); - - g_mutex_lock (self->lock); - - if ((prop = - gst_controller_find_controlled_property (self, - value_array->property_name))) { - /* get current value_array via control source */ - - if (!prop->csource) - goto out; - - res = - gst_control_source_get_value_array (prop->csource, timestamp, - value_array); - } - -out: - g_mutex_unlock (self->lock); - return res; -} - -/* gobject handling */ - -static void -_gst_controller_get_property (GObject * object, guint property_id, - GValue * value, GParamSpec * pspec) -{ - GstController *self = GST_CONTROLLER (object); - - switch (property_id) { - case PROP_CONTROL_RATE:{ - /* FIXME: don't change if element is playing, controller works for GObject - so this wont work - - GstState c_state, p_state; - GstStateChangeReturn ret; - - ret = gst_element_get_state (self->object, &c_state, &p_state, 0); - if ((ret == GST_STATE_CHANGE_SUCCESS && - (c_state == GST_STATE_NULL || c_state == GST_STATE_READY)) || - (ret == GST_STATE_CHANGE_ASYNC && - (p_state == GST_STATE_NULL || p_state == GST_STATE_READY))) { - */ - g_value_set_uint64 (value, self->priv->control_rate); - /* - } - else { - GST_WARNING ("Changing the control rate is only allowed if the elemnt" - " is in NULL or READY"); - } - */ - } - break; - default:{ - G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); - } - break; - } -} - -/* sets the given properties for this object */ -static void -_gst_controller_set_property (GObject * object, guint property_id, - const GValue * value, GParamSpec * pspec) -{ - GstController *self = GST_CONTROLLER (object); - - switch (property_id) { - case PROP_CONTROL_RATE:{ - self->priv->control_rate = g_value_get_uint64 (value); - } - break; - default:{ - G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); - } - break; - } -} - -static void -_gst_controller_dispose (GObject * object) -{ - GstController *self = GST_CONTROLLER (object); - - if (self->object != NULL) { - g_mutex_lock (self->lock); - /* free list of properties */ - if (self->properties) { - GList *node; - - for (node = self->properties; node; node = g_list_next (node)) { - GstControlledProperty *prop = node->data; - - gst_controlled_property_free (prop); - } - g_list_free (self->properties); - self->properties = NULL; - } - - /* remove controller from object's qdata list */ - g_object_set_qdata (self->object, priv_gst_controller_key, NULL); - g_object_unref (self->object); - self->object = NULL; - g_mutex_unlock (self->lock); - } - - if (G_OBJECT_CLASS (parent_class)->dispose) - (G_OBJECT_CLASS (parent_class)->dispose) (object); -} - -static void -_gst_controller_finalize (GObject * object) -{ - GstController *self = GST_CONTROLLER (object); - - g_mutex_free (self->lock); - - if (G_OBJECT_CLASS (parent_class)->finalize) - (G_OBJECT_CLASS (parent_class)->finalize) (object); -} - -static void -_gst_controller_init (GTypeInstance * instance, gpointer g_class) -{ - GstController *self = GST_CONTROLLER (instance); - - self->lock = g_mutex_new (); - self->priv = - G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_CONTROLLER, - GstControllerPrivate); - self->priv->last_sync = GST_CLOCK_TIME_NONE; - self->priv->control_rate = 100 * GST_MSECOND; -} - -static void -_gst_controller_class_init (GstControllerClass * klass) -{ - GObjectClass *gobject_class = G_OBJECT_CLASS (klass); - - parent_class = g_type_class_peek_parent (klass); - g_type_class_add_private (klass, sizeof (GstControllerPrivate)); - - gobject_class->set_property = _gst_controller_set_property; - gobject_class->get_property = _gst_controller_get_property; - gobject_class->dispose = _gst_controller_dispose; - gobject_class->finalize = _gst_controller_finalize; - - priv_gst_controller_key = g_quark_from_static_string ("gst::controller"); - - /* register properties */ - g_object_class_install_property (gobject_class, PROP_CONTROL_RATE, - g_param_spec_uint64 ("control-rate", - "control rate", - "Controlled properties will be updated at least every control-rate nanoseconds", - 1, G_MAXUINT, 100 * GST_MSECOND, - G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); - - /* register signals */ - /* set defaults for overridable methods */ -} - -GType -gst_controller_get_type (void) -{ - static volatile gsize type = 0; - - if (g_once_init_enter (&type)) { - GType _type; - static const GTypeInfo info = { - sizeof (GstControllerClass), - NULL, /* base_init */ - NULL, /* base_finalize */ - (GClassInitFunc) _gst_controller_class_init, /* class_init */ - NULL, /* class_finalize */ - NULL, /* class_data */ - sizeof (GstController), - 0, /* n_preallocs */ - (GInstanceInitFunc) _gst_controller_init, /* instance_init */ - NULL /* value_table */ - }; - _type = g_type_register_static (G_TYPE_OBJECT, "GstController", &info, 0); - g_once_init_leave (&type, _type); - } - return type; -} |