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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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ef7eb9efdd
This is to ensure people can create their own Layer Transition subclass. API : GESTimelineTransition is now GESTimelineStandardTransition
85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
/* GStreamer Editing Services
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* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
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* 2009 Nokia Corporation
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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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/**
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* SECTION:ges-track-operation
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* @short_description: Base Class for effects and overlays
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*/
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#include "ges-internal.h"
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#include "ges-track-object.h"
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#include "ges-track-operation.h"
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G_DEFINE_ABSTRACT_TYPE (GESTrackOperation, ges_track_operation,
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GES_TYPE_TRACK_OBJECT);
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struct _GESTrackOperationPrivate
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{
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/* Dummy variable */
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void *nothing;
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};
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static gboolean
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ges_track_operation_create_gnl_object (GESTrackObject * object)
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{
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GESTrackOperationClass *klass = NULL;
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GESTrackOperation *self = NULL;
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GstElement *child = NULL;
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GstElement *gnlobject;
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self = GES_TRACK_OPERATION (object);
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klass = GES_TRACK_OPERATION_GET_CLASS (self);
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gnlobject = gst_element_factory_make ("gnloperation", NULL);
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if (klass->create_element) {
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child = klass->create_element (self);
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if (G_UNLIKELY (!child)) {
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GST_ERROR ("create_element returned NULL");
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return TRUE;
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}
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gst_bin_add (GST_BIN (gnlobject), child);
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self->element = child;
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}
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object->gnlobject = gnlobject;
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return TRUE;
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}
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static void
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ges_track_operation_class_init (GESTrackOperationClass * klass)
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{
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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;
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klass->create_element = NULL;
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}
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static void
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ges_track_operation_init (GESTrackOperation * self)
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{
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self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
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GES_TYPE_TRACK_OPERATION, GESTrackOperationPrivate);
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}
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