gstreamer/ges/ges-track-operation.c

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/* GStreamer Editing Services
* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
* 2009 Nokia Corporation
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:ges-track-operation
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* @short_description: Base Class for effects and overlays
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*/
#include "ges-internal.h"
#include "ges-track-object.h"
#include "ges-track-operation.h"
G_DEFINE_TYPE (GESTrackOperation, ges_track_operation, GES_TYPE_TRACK_OBJECT);
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struct _GESTrackOperationPrivate
{
/* Dummy variable */
void *nothing;
};
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static gboolean
ges_track_operation_create_gnl_object (GESTrackObject * object)
{
GESTrackOperationClass *klass = NULL;
GESTrackOperation *self = NULL;
GstElement *child = NULL;
GstElement *gnlobject;
self = GES_TRACK_OPERATION (object);
klass = GES_TRACK_OPERATION_GET_CLASS (self);
gnlobject = gst_element_factory_make ("gnloperation", NULL);
if (klass->create_element) {
child = klass->create_element (self);
if (G_UNLIKELY (!child)) {
GST_ERROR ("create_element returned NULL");
return TRUE;
}
gst_bin_add (GST_BIN (gnlobject), child);
self->element = child;
}
object->gnlobject = gnlobject;
return TRUE;
}
static void
ges_track_operation_class_init (GESTrackOperationClass * klass)
{
GESTrackObjectClass *track_class = GES_TRACK_OBJECT_CLASS (klass);
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g_type_class_add_private (klass, sizeof (GESTrackOperationPrivate));
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track_class->create_gnl_object = ges_track_operation_create_gnl_object;
klass->create_element = NULL;
}
static void
ges_track_operation_init (GESTrackOperation * self)
{
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self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
GES_TYPE_TRACK_OPERATION, GESTrackOperationPrivate);
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}