3 * Copyright (C) 2011 Stefan Sauer <ensonic@users.sf.net>
5 * gstcontrolbinding.h: Attachment for control sources
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
23 #ifndef __GST_CONTROL_BINDING_H__
24 #define __GST_CONTROL_BINDING_H__
26 #include <gst/gstconfig.h>
28 #include <glib-object.h>
32 #define GST_TYPE_CONTROL_BINDING \
33 (gst_control_binding_get_type())
34 #define GST_CONTROL_BINDING(obj) \
35 (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CONTROL_BINDING,GstControlBinding))
36 #define GST_CONTROL_BINDING_CLASS(klass) \
37 (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CONTROL_BINDING,GstControlBindingClass))
38 #define GST_IS_CONTROL_BINDING(obj) \
39 (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CONTROL_BINDING))
40 #define GST_IS_CONTROL_BINDING_CLASS(klass) \
41 (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CONTROL_BINDING))
42 #define GST_CONTROL_BINDING_GET_CLASS(obj) \
43 (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_CONTOL_SOURCE, GstControlBindingClass))
45 typedef struct _GstControlBinding GstControlBinding;
46 typedef struct _GstControlBindingClass GstControlBindingClass;
47 typedef struct _GstControlBindingPrivate GstControlBindingPrivate;
49 #include <gst/gstcontrolsource.h>
52 * GstControlBindingConvert: (attributes doc.skip=true)
53 * FIXME(2.0): remove, this is unused
55 typedef void (* GstControlBindingConvert) (GstControlBinding *binding, gdouble src_value, GValue *dest_value);
59 * @parent: the parent structure
60 * @name: name of the property of this binding
61 * @pspec: #GParamSpec for this property
63 * The instance structure of #GstControlBinding.
65 struct _GstControlBinding {
73 #ifndef GST_DISABLE_DEPRECATED
74 GstObject *object; /* GstObject owning the property
75 * (== parent when bound) */
84 GstControlBindingPrivate *priv;
87 gpointer _gst_reserved[GST_PADDING];
92 * GstControlBindingClass:
93 * @parent_class: Parent class
95 * The class structure of #GstControlBinding.
98 struct _GstControlBindingClass
100 GstObjectClass parent_class;
105 * GstControlBindingClass::sync_values:
106 * @binding: the control binding
107 * @object: the object that has controlled properties
108 * @timestamp: the time that should be processed
109 * @last_sync: the last time this was called
111 * Update the target values
113 * Returns: %TRUE if the controller value could be applied to the object
114 * property, %FALSE otherwise
116 gboolean (* sync_values) (GstControlBinding *binding, GstObject *object, GstClockTime timestamp, GstClockTime last_sync);
119 * GstControlBindingClass::get_value:
120 * @binding: the control binding
121 * @timestamp: the time the control-change should be read from
123 * Fetch a single control-value
125 * Returns: (nullable): the GValue of the property at the given time,
126 * or %NULL if the property isn't controlled.
128 GValue * (* get_value) (GstControlBinding *binding, GstClockTime timestamp);
131 * GstControlBindingClass::get_value_array:
132 * @binding: the control binding
133 * @timestamp: the time that should be processed
134 * @interval: the time spacing between subsequent values
135 * @n_values: the number of values
136 * @values: (array length=n_values): array to put control-values in
138 * Fetch a series of control-values
140 * Returns: %TRUE if the given array could be filled, %FALSE otherwise
142 gboolean (* get_value_array) (GstControlBinding *binding, GstClockTime timestamp,GstClockTime interval, guint n_values, gpointer values);
145 * GstControlBindingClass::get_g_value_array:
146 * @binding: the control binding
147 * @timestamp: the time that should be processed
148 * @interval: the time spacing between subsequent values
149 * @n_values: the number of values
150 * @values: (array length=n_values): array to put control-values in
152 * Fetch a series of control-values as g_values
154 * Returns: %TRUE if the given array could be filled, %FALSE otherwise
156 gboolean (* get_g_value_array) (GstControlBinding *binding, GstClockTime timestamp,GstClockTime interval, guint n_values, GValue *values);
159 gpointer _gst_reserved[GST_PADDING];
162 #define GST_CONTROL_BINDING_PSPEC(cb) (((GstControlBinding *) cb)->pspec)
165 GType gst_control_binding_get_type (void);
170 gboolean gst_control_binding_sync_values (GstControlBinding * binding, GstObject *object,
171 GstClockTime timestamp, GstClockTime last_sync);
173 GValue * gst_control_binding_get_value (GstControlBinding *binding,
174 GstClockTime timestamp);
176 gboolean gst_control_binding_get_value_array (GstControlBinding *binding, GstClockTime timestamp,
177 GstClockTime interval, guint n_values, gpointer values);
179 gboolean gst_control_binding_get_g_value_array (GstControlBinding *binding, GstClockTime timestamp,
180 GstClockTime interval, guint n_values, GValue *values);
182 void gst_control_binding_set_disabled (GstControlBinding * binding, gboolean disabled);
185 gboolean gst_control_binding_is_disabled (GstControlBinding * binding);
187 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstControlBinding, gst_object_unref)
191 #endif /* __GST_CONTROL_BINDING_H__ */