gstreamer/gst-libs/gst/gl/gstglcontrolbindingproxy.c
Matthew Waters 2cef90184e gl: move control binding proxy implementation from glvideomixer
Other elements may need to use it's functionality
2017-12-09 19:32:15 +00:00

155 lines
4.4 KiB
C

/*
* GStreamer
* Copyright (C) 2016 Matthew Waters <matthew@centricular.com>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstglcontrolbindingproxy.h"
G_DEFINE_TYPE (GstGLControlBindingProxy,
gst_gl_control_binding_proxy, GST_TYPE_CONTROL_BINDING);
static void
gst_gl_control_binding_proxy_init (GstGLControlBindingProxy * self)
{
}
static gboolean
gst_gl_control_binding_proxy_sync_values (GstControlBinding * binding,
GstObject * object, GstClockTime timestamp, GstClockTime last_sync)
{
GstGLControlBindingProxy *self = (GstGLControlBindingProxy *)
binding;
GstControlBinding *ref_binding;
gboolean ret = TRUE;
ref_binding = gst_object_get_control_binding (self->ref_object,
self->property_name);
if (ref_binding) {
ret = gst_control_binding_sync_values (ref_binding, self->ref_object,
timestamp, last_sync);
gst_object_unref (ref_binding);
}
return ret;
}
static GValue *
gst_gl_control_binding_proxy_get_value (GstControlBinding * binding,
GstClockTime timestamp)
{
GstGLControlBindingProxy *self = (GstGLControlBindingProxy *)
binding;
GstControlBinding *ref_binding;
GValue *ret = NULL;
ref_binding = gst_object_get_control_binding (self->ref_object,
self->property_name);
if (ref_binding) {
ret = gst_control_binding_get_value (ref_binding, timestamp);
gst_object_unref (ref_binding);
}
return ret;
}
static gboolean
gst_gl_control_binding_proxy_get_value_array (GstControlBinding * binding,
GstClockTime timestamp, GstClockTime interval, guint n_values,
gpointer values)
{
GstGLControlBindingProxy *self = (GstGLControlBindingProxy *)
binding;
GstControlBinding *ref_binding;
gboolean ret = FALSE;
ref_binding = gst_object_get_control_binding (self->ref_object,
self->property_name);
if (ref_binding) {
ret = gst_control_binding_get_value_array (ref_binding, timestamp,
interval, n_values, values);
gst_object_unref (ref_binding);
}
return ret;
}
static gboolean
gst_gl_control_binding_proxy_get_g_value_array (GstControlBinding *
binding, GstClockTime timestamp, GstClockTime interval, guint n_values,
GValue * values)
{
GstGLControlBindingProxy *self = (GstGLControlBindingProxy *)
binding;
GstControlBinding *ref_binding;
gboolean ret = FALSE;
ref_binding = gst_object_get_control_binding (self->ref_object,
self->property_name);
if (ref_binding) {
ret = gst_control_binding_get_g_value_array (ref_binding, timestamp,
interval, n_values, values);
gst_object_unref (ref_binding);
}
return ret;
}
static void
gst_gl_control_binding_proxy_class_init
(GstGLControlBindingProxyClass * klass)
{
GstControlBindingClass *cb_class = GST_CONTROL_BINDING_CLASS (klass);
cb_class->sync_values = gst_gl_control_binding_proxy_sync_values;
cb_class->get_value = gst_gl_control_binding_proxy_get_value;
cb_class->get_value_array = gst_gl_control_binding_proxy_get_value_array;
cb_class->get_g_value_array = gst_gl_control_binding_proxy_get_g_value_array;
}
GstControlBinding *
gst_gl_control_binding_proxy_new (GstObject * object,
const gchar * property_name, GstObject * ref_object,
const gchar * ref_property_name)
{
GstGLControlBindingProxy *self =
g_object_new (GST_TYPE_GL_CONTROL_BINDING_PROXY, "object", object,
"name", property_name, NULL);
self->ref_object = ref_object;
self->property_name = ref_property_name;
return (GstControlBinding *) self;
}
void
gst_gl_object_add_control_binding_proxy (GstObject * object,
GstObject * ref_object, const gchar * prop)
{
GstControlBinding *cb;
cb = gst_gl_control_binding_proxy_new (object, prop, ref_object, prop);
gst_object_add_control_binding (object, cb);
}