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147 lines
4 KiB
C
147 lines
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-timeline-transition
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* @short_description: Base Class for transitions in a #GESTimelineLayer
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*/
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#include "ges-internal.h"
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#include "ges-timeline-transition.h"
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#include "ges-track-transition.h"
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G_DEFINE_TYPE (GESTimelineTransition, ges_timeline_transition,
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GES_TYPE_TIMELINE_OBJECT);
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static GESTrackObject *ges_tl_transition_create_track_object (GESTimelineObject
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*, GESTrack *);
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static void
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ges_timeline_transition_get_property (GObject * object,
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guint property_id, GValue * value, GParamSpec * pspec)
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{
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switch (property_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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}
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}
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static void
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ges_timeline_transition_set_property (GObject * object, guint property_id,
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const GValue * value, GParamSpec * pspec)
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{
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switch (property_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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}
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}
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static void
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ges_timeline_transition_dispose (GObject * object)
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{
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G_OBJECT_CLASS (ges_timeline_transition_parent_class)->dispose (object);
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}
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static void
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ges_timeline_transition_finalize (GObject * object)
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{
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G_OBJECT_CLASS (ges_timeline_transition_parent_class)->finalize (object);
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}
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static void
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ges_timeline_transition_class_init (GESTimelineTransitionClass * klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GESTimelineObjectClass *timobj_class = GES_TIMELINE_OBJECT_CLASS (klass);
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object_class->get_property = ges_timeline_transition_get_property;
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object_class->set_property = ges_timeline_transition_set_property;
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object_class->dispose = ges_timeline_transition_dispose;
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object_class->finalize = ges_timeline_transition_finalize;
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timobj_class->create_track_object = ges_tl_transition_create_track_object;
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timobj_class->need_fill_track = FALSE;
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}
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static void
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ges_timeline_transition_init (GESTimelineTransition * self)
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{
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self->vtype = NULL;
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}
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static GESTrackObject *
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ges_tl_transition_create_track_object (GESTimelineObject * obj,
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GESTrack * track)
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{
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GESTimelineTransition *transition = (GESTimelineTransition *) obj;
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GESTrackObject *res;
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GST_DEBUG ("Creating a GESTrackTransition");
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res = GES_TRACK_OBJECT (ges_track_transition_new (transition->vtype));
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return res;
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}
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GESTimelineTransition *
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ges_timeline_transition_new (GEnumValue * vtype)
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{
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GESTimelineTransition *ret = g_object_new
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(GES_TYPE_TIMELINE_TRANSITION, NULL);
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ret->vtype = vtype;
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return ret;
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}
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static GEnumClass *smpte_enum_class = NULL;
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static
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_ensure_smpte_enum_class ()
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{
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if (!smpte_enum_class) {
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GstElement *element = gst_element_factory_make ("smpte", NULL);
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GstElementClass *element_class = GST_ELEMENT_GET_CLASS (element);
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GParamSpec *pspec =
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g_object_class_find_property (G_OBJECT_CLASS (element_class), "type");
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smpte_enum_class = G_ENUM_CLASS (g_type_class_ref (pspec->value_type));
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}
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}
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GESTimelineTransition *
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ges_timeline_transition_new_for_nick (char *nick)
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{
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_ensure_smpte_enum_class ();
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if (!strcmp ("crossfade", nick)) {
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return ges_timeline_transition_new (NULL);
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}
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GEnumValue *value = g_enum_get_value_by_nick (smpte_enum_class, nick);
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if (!value) {
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return NULL;
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}
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return ges_timeline_transition_new (value);
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}
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