gst-inspect: fix unused-const-variable error in windows
[platform/upstream/gstreamer.git] / gst / gstcontrolbinding.h
1 /* GStreamer
2  *
3  * Copyright (C) 2011 Stefan Sauer <ensonic@users.sf.net>
4  *
5  * gstcontrolbinding.h: Attachment for control sources
6  *
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.
11  *
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.
16  *
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.
21  */
22
23 #ifndef __GST_CONTROL_BINDING_H__
24 #define __GST_CONTROL_BINDING_H__
25
26 #include <gst/gstconfig.h>
27
28 #include <glib-object.h>
29
30 G_BEGIN_DECLS
31
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))
44
45 typedef struct _GstControlBinding GstControlBinding;
46 typedef struct _GstControlBindingClass GstControlBindingClass;
47 typedef struct _GstControlBindingPrivate GstControlBindingPrivate;
48
49 #include <gst/gstcontrolsource.h>
50
51 /* FIXME(2.0): remove, this is unused */
52 typedef void (* GstControlBindingConvert) (GstControlBinding *binding, gdouble src_value, GValue *dest_value);
53
54 /**
55  * GstControlBinding:
56  * @name: name of the property of this binding
57  * @pspec: #GParamSpec for this property
58  *
59  * The instance structure of #GstControlBinding.
60  */
61 struct _GstControlBinding {
62   GstObject parent;
63
64   /*< public >*/
65   gchar *name;
66   GParamSpec *pspec;
67
68   /*< private >*/
69 #ifndef GST_DISABLE_DEPRECATED
70   GstObject *object;            /* GstObject owning the property
71                                  * (== parent when bound) */
72 #else
73   gpointer __object;
74 #endif
75   gboolean disabled;
76
77   union {
78     struct {
79       GstControlBindingPrivate *priv;
80     } abi;
81     gpointer _gst_reserved[GST_PADDING];
82   } ABI;
83 };
84
85 /**
86  * GstControlBindingClass:
87  * @parent_class: Parent class
88  * @sync_values: implementation for updating the target values
89  * @get_value: implementation to fetch a single control-value
90  * @get_value_array: implementation to fetch a series of control-values
91  * @get_g_value_array: implementation to fetch a series of control-values
92  *                     as g_values
93  *
94  * The class structure of #GstControlBinding.
95  */
96
97 struct _GstControlBindingClass
98 {
99   GstObjectClass parent_class;
100
101   /*< public >*/
102   gboolean (* sync_values) (GstControlBinding *binding, GstObject *object, GstClockTime timestamp, GstClockTime last_sync);
103   GValue * (* get_value) (GstControlBinding *binding, GstClockTime timestamp);
104   gboolean (* get_value_array) (GstControlBinding *binding, GstClockTime timestamp,GstClockTime interval, guint n_values, gpointer values);
105   gboolean (* get_g_value_array) (GstControlBinding *binding, GstClockTime timestamp,GstClockTime interval, guint n_values, GValue *values);
106
107   /*< private >*/
108   gpointer _gst_reserved[GST_PADDING];
109 };
110
111 #define GST_CONTROL_BINDING_PSPEC(cb) (((GstControlBinding *) cb)->pspec)
112
113 GST_API
114 GType               gst_control_binding_get_type (void);
115
116 /* Functions */
117
118 GST_API
119 gboolean            gst_control_binding_sync_values        (GstControlBinding * binding, GstObject *object,
120                                                             GstClockTime timestamp, GstClockTime last_sync);
121 GST_API
122 GValue *            gst_control_binding_get_value          (GstControlBinding *binding,
123                                                             GstClockTime timestamp);
124 GST_API
125 gboolean            gst_control_binding_get_value_array    (GstControlBinding *binding, GstClockTime timestamp,
126                                                             GstClockTime interval, guint n_values, gpointer values);
127 GST_API
128 gboolean            gst_control_binding_get_g_value_array  (GstControlBinding *binding, GstClockTime timestamp,
129                                                             GstClockTime interval, guint n_values, GValue *values);
130 GST_API
131 void                gst_control_binding_set_disabled       (GstControlBinding * binding, gboolean disabled);
132
133 GST_API
134 gboolean            gst_control_binding_is_disabled        (GstControlBinding * binding);
135
136 #ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
137 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstControlBinding, gst_object_unref)
138 #endif
139
140 G_END_DECLS
141
142 #endif /* __GST_CONTROL_BINDING_H__ */