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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>
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;
typedef struct _GstControlBindingPrivate GstControlBindingPrivate;
#include <gst/gstcontrolsource.h>
/**
* GstControlBindingConvert: (attributes doc.skip=true)
* FIXME(2.0): remove, this is unused
*/
typedef void (* GstControlBindingConvert) (GstControlBinding *binding, gdouble src_value, GValue *dest_value);
/**
* GstControlBinding:
* @parent: the parent structure
* @name: name of the property of this binding
* @pspec: #GParamSpec for this property
*
* The instance structure of #GstControlBinding.
*/
struct _GstControlBinding {
GstObject parent;
/*< public >*/
gchar *name;
GParamSpec *pspec;
/*< private >*/
#ifndef GST_DISABLE_DEPRECATED
GstObject *object; /* GstObject owning the property
* (== parent when bound) */
#else
gpointer __object;
#endif
gboolean disabled;
union {
struct {
/*< private >*/
GstControlBindingPrivate *priv;
} abi;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
} ABI;
};
/**
* GstControlBindingClass:
* @parent_class: Parent class
*
* The class structure of #GstControlBinding.
*/
struct _GstControlBindingClass
{
GstObjectClass parent_class;
/*< public >*/
/**
* GstControlBindingClass::sync_values:
* @binding: the control binding
* @object: the object that has controlled properties
* @timestamp: the time that should be processed
* @last_sync: the last time this was called
*
* Update the target values
*
* Returns: %TRUE if the controller value could be applied to the object
* property, %FALSE otherwise
*/
gboolean (* sync_values) (GstControlBinding *binding, GstObject *object, GstClockTime timestamp, GstClockTime last_sync);
/**
* GstControlBindingClass::get_value:
* @binding: the control binding
* @timestamp: the time the control-change should be read from
*
* Fetch a single control-value
*
* Returns: (nullable): the GValue of the property at the given time,
* or %NULL if the property isn't controlled.
*/
GValue * (* get_value) (GstControlBinding *binding, GstClockTime timestamp);
/**
* GstControlBindingClass::get_value_array:
* @binding: the control binding
* @timestamp: the time that should be processed
* @interval: the time spacing between subsequent values
* @n_values: the number of values
* @values: (array length=n_values): array to put control-values in
*
* Fetch a series of control-values
*
* Returns: %TRUE if the given array could be filled, %FALSE otherwise
*/
gboolean (* get_value_array) (GstControlBinding *binding, GstClockTime timestamp,GstClockTime interval, guint n_values, gpointer values);
/**
* GstControlBindingClass::get_g_value_array:
* @binding: the control binding
* @timestamp: the time that should be processed
* @interval: the time spacing between subsequent values
* @n_values: the number of values
* @values: (array length=n_values): array to put control-values in
*
* Fetch a series of control-values as g_values
*
* Returns: %TRUE if the given array could be filled, %FALSE otherwise
*/
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)
GST_API
GType gst_control_binding_get_type (void);
/* Functions */
GST_API
gboolean gst_control_binding_sync_values (GstControlBinding * binding, GstObject *object,
GstClockTime timestamp, GstClockTime last_sync);
GST_API
GValue * gst_control_binding_get_value (GstControlBinding *binding,
GstClockTime timestamp);
GST_API
gboolean gst_control_binding_get_value_array (GstControlBinding *binding, GstClockTime timestamp,
GstClockTime interval, guint n_values, gpointer values);
GST_API
gboolean gst_control_binding_get_g_value_array (GstControlBinding *binding, GstClockTime timestamp,
GstClockTime interval, guint n_values, GValue *values);
GST_API
void gst_control_binding_set_disabled (GstControlBinding * binding, gboolean disabled);
GST_API
gboolean gst_control_binding_is_disabled (GstControlBinding * binding);
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstControlBinding, gst_object_unref)
G_END_DECLS
#endif /* __GST_CONTROL_BINDING_H__ */
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