gstreamer/ges/ges-track.c
2009-08-07 16:51:49 +02:00

162 lines
4.1 KiB
C

/* GStreamer Editing Services
* Copyright (C) 2009 Edward Hervey <bilboed@bilboed.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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "ges-internal.h"
#include "ges-track.h"
#include "ges-track-object.h"
/**
* GESTrack
*
* Corresponds to one output format (i.e. audio OR video)
*
* Contains the compatible TrackObject(s)
*/
G_DEFINE_TYPE (GESTrack, ges_track, GST_TYPE_BIN);
static void
ges_track_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_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_dispose (GObject * object)
{
GESTrack *track = (GESTrack *) object;
/* FIXME : Remove all TrackObjects ! */
if (track->composition) {
gst_bin_remove (GST_BIN (object), track->composition);
track->composition = NULL;
}
G_OBJECT_CLASS (ges_track_parent_class)->dispose (object);
}
static void
ges_track_finalize (GObject * object)
{
G_OBJECT_CLASS (ges_track_parent_class)->finalize (object);
}
static void
ges_track_class_init (GESTrackClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->get_property = ges_track_get_property;
object_class->set_property = ges_track_set_property;
object_class->dispose = ges_track_dispose;
object_class->finalize = ges_track_finalize;
}
static void
ges_track_init (GESTrack * self)
{
self->composition = gst_element_factory_make ("gnlcomposition", NULL);
if (!gst_bin_add (GST_BIN (self), self->composition))
GST_ERROR ("Couldn't add composition to bin !");
}
GESTrack *
ges_track_new (void)
{
return g_object_new (GES_TYPE_TRACK, NULL);
}
void
ges_track_set_timeline (GESTrack * track, GESTimeline * timeline)
{
GST_DEBUG ("track:%p, timeline:%p", track, timeline);
track->timeline = timeline;
}
gboolean
ges_track_add_object (GESTrack * track, GESTrackObject * object)
{
GST_DEBUG ("track:%p, object:%p", track, object);
if (G_UNLIKELY (object->track != NULL)) {
GST_WARNING ("Object already belongs to another track");
return FALSE;
}
if (G_UNLIKELY (object->gnlobject != NULL)) {
GST_ERROR ("TrackObject doesn't have a gnlobject !");
return FALSE;
}
if (G_UNLIKELY (!ges_track_object_set_track (object, track))) {
GST_ERROR ("Couldn't properly add the object to the Track");
return FALSE;
}
GST_DEBUG ("Adding object to ourself");
/* make sure the object has a valid gnlobject ! */
if (G_UNLIKELY (!gst_bin_add (GST_BIN (track->composition),
object->gnlobject))) {
GST_WARNING ("Couldn't add object to the GnlComposition");
return FALSE;
}
return TRUE;
}
gboolean
ges_track_remove_object (GESTrack * track, GESTrackObject * object)
{
GST_DEBUG ("track:%p, object:%p", track, object);
if (G_UNLIKELY (object->track != track)) {
GST_WARNING ("Object belongs to another track");
return FALSE;
}
if (G_LIKELY (object->gnlobject != NULL)) {
GST_DEBUG ("Removing GnlObject from composition");
if (!gst_bin_remove (GST_BIN (track->composition), object->gnlobject)) {
GST_WARNING ("Failed to remove gnlobject from composition");
return FALSE;
}
}
ges_track_object_set_track (object, NULL);
return TRUE;
}