gstreamer/ges/ges-track-transition.c
2010-07-09 13:21:15 +02:00

156 lines
4.5 KiB
C

/* GStreamer Editing Services
* Copyright (C) 2010 Brandon Lewis <brandon@collabora.co.uk>
* 2010 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-transition
* @short_description: base class for audio and video transitions
*
*/
#include "ges-internal.h"
#include "ges-track-object.h"
#include "ges-track-transition.h"
#include "ges-timeline-transition.h"
G_DEFINE_TYPE (GESTrackTransition, ges_track_transition, GES_TYPE_TRACK_OBJECT);
GstElement *ges_track_transition_create_element (GESTrackTransition * self);
static void
gnlobject_duration_cb (GstElement * gnlobject, GParamSpec * arg
G_GNUC_UNUSED, GESTrackTransition * self)
{
GESTrackTransitionClass *klass;
klass = GES_TRACK_TRANSITION_GET_CLASS (self);
GST_LOG ("got duration changed signal");
klass = GES_TRACK_TRANSITION_GET_CLASS (self);
klass->duration_changed (self, gnlobject);
}
static void
ges_track_transition_duration_changed (GESTrackTransition * self, GstElement
* gnlobject)
{
GESTrackType type;
type = ((GESTrackObject *) self)->track->type;
GST_WARNING ("transitions don't handle this track type!");
}
static void
ges_track_transition_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
switch (property_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_track_transition_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
switch (property_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_track_transition_dispose (GObject * object)
{
G_OBJECT_CLASS (ges_track_transition_parent_class)->dispose (object);
}
static void
ges_track_transition_finalize (GObject * object)
{
G_OBJECT_CLASS (ges_track_transition_parent_class)->finalize (object);
}
static gboolean
ges_track_transition_create_gnl_object (GESTrackObject * object)
{
GESTrackTransition *self;
GESTrackTransitionClass *klass;
GstElement *element;
gchar *name;
static gint tnum = 0;
self = GES_TRACK_TRANSITION (object);
klass = GES_TRACK_TRANSITION_GET_CLASS (object);
name = g_strdup_printf ("transition-operation%d", tnum++);
object->gnlobject = gst_element_factory_make ("gnloperation", name);
g_free (name);
g_object_set (object->gnlobject, "priority", 0, NULL);
g_signal_connect (G_OBJECT (object->gnlobject), "notify::duration",
G_CALLBACK (gnlobject_duration_cb), object);
element = klass->create_element (self);
if (!GST_IS_ELEMENT (element))
return FALSE;
gst_bin_add (GST_BIN (object->gnlobject), element);
klass->duration_changed (self, object->gnlobject);
return TRUE;
}
GstElement *
ges_track_transition_create_element (GESTrackTransition * self)
{
GST_WARNING ("transitions don't handle this track type!");
return gst_element_factory_make ("identity", "invalid-track-type");
}
static void
ges_track_transition_class_init (GESTrackTransitionClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GESTrackObjectClass *track_class = GES_TRACK_OBJECT_CLASS (klass);
object_class->get_property = ges_track_transition_get_property;
object_class->set_property = ges_track_transition_set_property;
object_class->dispose = ges_track_transition_dispose;
object_class->finalize = ges_track_transition_finalize;
track_class->create_gnl_object = ges_track_transition_create_gnl_object;
klass->create_element = ges_track_transition_create_element;
klass->duration_changed = ges_track_transition_duration_changed;
}
static void
ges_track_transition_init (GESTrackTransition * self)
{
}
GESTrackTransition *
ges_track_transition_new (void)
{
GESTrackTransition *ret = g_object_new (GES_TYPE_TRACK_TRANSITION, NULL);
return ret;
}