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39d6b7462f
ControlSources are now gdouble based. A control source is mapped to a particullar GObject property using a ControlBinding.
118 lines
4.1 KiB
C
118 lines
4.1 KiB
C
/* GStreamer
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*
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* Copyright (C) 2011 Stefan Sauer <ensonic@users.sf.net>
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*
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* gstcontrolbinding.h: Attachment for control sources
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_CONTROL_BINDING_H__
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#define __GST_CONTROL_BINDING_H__
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#include <gst/gstconfig.h>
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#include <glib-object.h>
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#include <gst/gstcontrolsource.h>
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G_BEGIN_DECLS
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#define GST_TYPE_CONTROL_BINDING \
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(gst_control_binding_get_type())
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#define GST_CONTROL_BINDING(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CONTROL_BINDING,GstControlBinding))
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#define GST_CONTROL_BINDING_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CONTROL_BINDING,GstControlBindingClass))
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#define GST_IS_CONTROL_BINDING(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CONTROL_BINDING))
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#define GST_IS_CONTROL_BINDING_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CONTROL_BINDING))
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#define GST_CONTROL_BINDING_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_CONTOL_SOURCE, GstControlBindingClass))
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typedef struct _GstControlBinding GstControlBinding;
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typedef struct _GstControlBindingClass GstControlBindingClass;
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/**
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* GstControlBindingConvert:
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* @self: the #GstControlBinding instance
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* @src_value: the value returned by the cotnrol source
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* @dest_value: the target GValue
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*
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* Function to map a control-value to the target GValue.
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*/
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typedef void (* GstControlBindingConvert) (GstControlBinding *self, gdouble src_value, GValue *dest_value);
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/**
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* GstControlBinding:
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* @name: name of the property of this binding
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*
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* The instance structure of #GstControlBinding.
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*/
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struct _GstControlBinding {
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GObject parent;
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/*< public >*/
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const gchar *name; /* name of the property */
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/*< private >*/
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GParamSpec *pspec; /* GParamSpec for this property */
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GstControlSource *csource; /* GstControlSource for this property */
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gboolean disabled;
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GValue cur_value;
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gdouble last_value;
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GstControlBindingConvert convert;
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gpointer _gst_reserved[GST_PADDING];
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};
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/**
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* GstControlBindingClass:
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* @parent_class: Parent class
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* @convert: Class method to convert control-values
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*
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* The class structure of #GstControlBinding.
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*/
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struct _GstControlBindingClass
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{
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GObjectClass parent_class;
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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GType gst_control_binding_get_type (void);
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/* Functions */
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GstControlBinding * gst_control_binding_new (GstObject * object, const gchar * property_name,
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GstControlSource * csource);
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gboolean gst_control_binding_sync_values (GstControlBinding * self, GstObject *object,
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GstClockTime timestamp, GstClockTime last_sync);
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GValue * gst_control_binding_get_value (GstControlBinding *binding,
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GstClockTime timestamp);
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gboolean gst_control_binding_get_value_array (GstControlBinding *binding, GstClockTime timestamp,
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GstClockTime interval, guint n_values, GValue *values);
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GstControlSource * gst_control_binding_get_control_source (GstControlBinding * self);
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void gst_control_binding_set_disabled (GstControlBinding * self, gboolean disabled);
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gboolean gst_control_binding_is_disabled (GstControlBinding * self);
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G_END_DECLS
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#endif /* __GST_CONTROL_BINDING_H__ */
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