gstreamer/gst/gstcontrolbinding.h

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/* GStreamer
*
* Copyright (C) 2011 Stefan Sauer <ensonic@users.sf.net>
*
* gstcontrolbinding.h: Attachment for control sources
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_CONTROL_BINDING_H__
#define __GST_CONTROL_BINDING_H__
#include <gst/gstconfig.h>
#include <glib-object.h>
#include <gst/gstcontrolsource.h>
G_BEGIN_DECLS
#define GST_TYPE_CONTROL_BINDING \
(gst_control_binding_get_type())
#define GST_CONTROL_BINDING(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CONTROL_BINDING,GstControlBinding))
#define GST_CONTROL_BINDING_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CONTROL_BINDING,GstControlBindingClass))
#define GST_IS_CONTROL_BINDING(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CONTROL_BINDING))
#define GST_IS_CONTROL_BINDING_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CONTROL_BINDING))
#define GST_CONTROL_BINDING_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_CONTOL_SOURCE, GstControlBindingClass))
typedef struct _GstControlBinding GstControlBinding;
typedef struct _GstControlBindingClass GstControlBindingClass;
/* FIXME(2.0): remove, this is unused */
typedef void (* GstControlBindingConvert) (GstControlBinding *binding, gdouble src_value, GValue *dest_value);
/**
* GstControlBinding:
* @name: name of the property of this binding
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* @pspec: #GParamSpec for this property
*
* The instance structure of #GstControlBinding.
*/
struct _GstControlBinding {
GstObject parent;
/*< public >*/
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gchar *name;
GParamSpec *pspec;
/*< private >*/
GstObject *object; /* GstObject owning the property
* (== parent when bound) */
gboolean disabled;
gpointer _gst_reserved[GST_PADDING];
};
/**
* GstControlBindingClass:
* @parent_class: Parent class
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* @sync_values: implementation for updating the target values
* @get_value: implementation to fetch a single control-value
* @get_value_array: implementation to fetch a series of control-values
* @get_g_value_array: implementation to fetch a series of control-values
* as g_values
*
* The class structure of #GstControlBinding.
*/
struct _GstControlBindingClass
{
GstObjectClass parent_class;
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/*< public >*/
gboolean (* sync_values) (GstControlBinding *binding, GstObject *object, GstClockTime timestamp, GstClockTime last_sync);
GValue * (* get_value) (GstControlBinding *binding, GstClockTime timestamp);
gboolean (* get_value_array) (GstControlBinding *binding, GstClockTime timestamp,GstClockTime interval, guint n_values, gpointer values);
gboolean (* get_g_value_array) (GstControlBinding *binding, GstClockTime timestamp,GstClockTime interval, guint n_values, GValue *values);
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
#define GST_CONTROL_BINDING_PSPEC(cb) (((GstControlBinding *) cb)->pspec)
GType gst_control_binding_get_type (void);
/* Functions */
gboolean gst_control_binding_sync_values (GstControlBinding * binding, GstObject *object,
GstClockTime timestamp, GstClockTime last_sync);
GValue * gst_control_binding_get_value (GstControlBinding *binding,
GstClockTime timestamp);
gboolean gst_control_binding_get_value_array (GstControlBinding *binding, GstClockTime timestamp,
GstClockTime interval, guint n_values, gpointer values);
gboolean gst_control_binding_get_g_value_array (GstControlBinding *binding, GstClockTime timestamp,
GstClockTime interval, guint n_values, GValue *values);
void gst_control_binding_set_disabled (GstControlBinding * binding, gboolean disabled);
gboolean gst_control_binding_is_disabled (GstControlBinding * binding);
G_END_DECLS
#endif /* __GST_CONTROL_BINDING_H__ */