gstreamer/ges/ges-track-parse-launch-effect.c
2012-08-18 15:32:54 -04:00

203 lines
6 KiB
C

/* GStreamer Editing Services
* Copyright (C) 2010 Thibault Saunier <thibault.saunier@collabora.co.uk>
*
* 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-parse-launch-effect
* @short_description: adds an effect build from a parse-launch style
* bin description to a stream in a #GESTimelineSource or a #GESTimelineLayer
*/
#include "ges-internal.h"
#include "ges-track-object.h"
#include "ges-track-effect.h"
#include "ges-track-parse-launch-effect.h"
G_DEFINE_TYPE (GESTrackParseLaunchEffect, ges_track_parse_launch_effect,
GES_TYPE_TRACK_EFFECT);
static void ges_track_parse_launch_effect_dispose (GObject * object);
static void ges_track_parse_launch_effect_finalize (GObject * object);
static GstElement *ges_track_parse_launch_effect_create_element (GESTrackObject
* self);
struct _GESTrackParseLaunchEffectPrivate
{
gchar *bin_description;
};
enum
{
PROP_0,
PROP_BIN_DESCRIPTION,
};
static void
ges_track_parse_launch_effect_get_property (GObject * object,
guint property_id, GValue * value, GParamSpec * pspec)
{
GESTrackParseLaunchEffectPrivate *priv =
GES_TRACK_PARSE_LAUNCH_EFFECT (object)->priv;
switch (property_id) {
case PROP_BIN_DESCRIPTION:
g_value_set_string (value, priv->bin_description);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_track_parse_launch_effect_set_property (GObject * object,
guint property_id, const GValue * value, GParamSpec * pspec)
{
GESTrackParseLaunchEffect *self = GES_TRACK_PARSE_LAUNCH_EFFECT (object);
switch (property_id) {
case PROP_BIN_DESCRIPTION:
self->priv->bin_description = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_track_parse_launch_effect_class_init (GESTrackParseLaunchEffectClass *
klass)
{
GObjectClass *object_class;
GESTrackObjectClass *obj_bg_class;
object_class = G_OBJECT_CLASS (klass);
obj_bg_class = GES_TRACK_OBJECT_CLASS (klass);
g_type_class_add_private (klass, sizeof (GESTrackParseLaunchEffectPrivate));
object_class->get_property = ges_track_parse_launch_effect_get_property;
object_class->set_property = ges_track_parse_launch_effect_set_property;
object_class->dispose = ges_track_parse_launch_effect_dispose;
object_class->finalize = ges_track_parse_launch_effect_finalize;
obj_bg_class->create_element = ges_track_parse_launch_effect_create_element;
/**
* GESTrackParseLaunchEffect:bin-description:
*
* The description of the effect bin with a gst-launch-style
* pipeline description.
*
* Example: "videobalance saturation=1.5 hue=+0.5"
*/
g_object_class_install_property (object_class, PROP_BIN_DESCRIPTION,
g_param_spec_string ("bin-description",
"bin description",
"Bin description of the effect",
NULL, G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
}
static void
ges_track_parse_launch_effect_init (GESTrackParseLaunchEffect * self)
{
self->priv =
G_TYPE_INSTANCE_GET_PRIVATE (self, GES_TYPE_TRACK_PARSE_LAUNCH_EFFECT,
GESTrackParseLaunchEffectPrivate);
}
static void
ges_track_parse_launch_effect_dispose (GObject * object)
{
G_OBJECT_CLASS (ges_track_parse_launch_effect_parent_class)->dispose (object);
}
static void
ges_track_parse_launch_effect_finalize (GObject * object)
{
GESTrackParseLaunchEffect *self = GES_TRACK_PARSE_LAUNCH_EFFECT (object);
if (self->priv->bin_description)
g_free (self->priv->bin_description);
G_OBJECT_CLASS (ges_track_parse_launch_effect_parent_class)->finalize
(object);
}
static GstElement *
ges_track_parse_launch_effect_create_element (GESTrackObject * object)
{
GstElement *effect;
gchar *bin_desc;
GError *error = NULL;
GESTrackParseLaunchEffect *self = GES_TRACK_PARSE_LAUNCH_EFFECT (object);
GESTrack *track = ges_track_object_get_track (object);
if (!track) {
GST_WARNING
("The object %p should be in a Track for the element to be created",
object);
return NULL;
}
if (track->type == GES_TRACK_TYPE_VIDEO) {
bin_desc = g_strconcat ("videoconvert name=pre_video_convert ! ",
self->priv->bin_description, " ! videoconvert name=post_video_convert",
NULL);
} else if (track->type == GES_TRACK_TYPE_AUDIO) {
bin_desc =
g_strconcat ("audioconvert ! audioresample !",
self->priv->bin_description, NULL);
} else {
GST_DEBUG ("Track type not supported");
return NULL;
}
effect = gst_parse_bin_from_description (bin_desc, TRUE, &error);
g_free (bin_desc);
if (error != NULL) {
GST_ERROR ("An error occured while creating the GstElement: %s",
error->message);
g_error_free (error);
return NULL;
}
GST_DEBUG ("Created effect %p", effect);
return effect;
}
/**
* ges_track_parse_launch_effect_new:
* @bin_description: The gst-launch like bin description of the effect
*
* Creates a new #GESTrackParseLaunchEffect from the description of the bin.
*
* Returns: a newly created #GESTrackParseLaunchEffect, or %NULL if something went
* wrong.
*
* Since: 0.10.2
*/
GESTrackParseLaunchEffect *
ges_track_parse_launch_effect_new (const gchar * bin_description)
{
return g_object_new (GES_TYPE_TRACK_PARSE_LAUNCH_EFFECT, "bin-description",
bin_description, NULL);
}