gstreamer/ges/ges-track-effect.c

174 lines
4.7 KiB
C

/* GStreamer Editing Services
* Copyright (C) 2010 Thibault Saunier <tsaunier@gnome.org>
*
* 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-effect
* @short_description: adds an effect to a stream in a #GESTimelineSource or a
* #GESTimelineLayer
*
*/
#include "ges-internal.h"
#include "ges-track-object.h"
#include "ges-track-effect.h"
G_DEFINE_TYPE (GESTrackEffect, ges_track_effect, GES_TYPE_TRACK_OPERATION);
static void ges_track_effect_dispose (GObject * object);
static void ges_track_effect_finalize (GObject * object);
static GstElement *ges_track_effect_create_element (GESTrackObject * self);
struct _GESTrackEffectPrivate
{
gchar *bin_description;
};
enum
{
PROP_0,
PROP_BIN_DESCRIPTION,
};
static void
ges_track_effect_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_effect_set_property (GObject * object,
guint property_id, const GValue * value, GParamSpec * pspec)
{
GESTrackEffect *self = GES_TRACK_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_effect_class_init (GESTrackEffectClass * 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 (GESTrackEffectPrivate));
object_class->get_property = ges_track_effect_get_property;
object_class->set_property = ges_track_effect_set_property;
object_class->dispose = ges_track_effect_dispose;
object_class->finalize = ges_track_effect_finalize;
obj_bg_class->create_element = ges_track_effect_create_element;
/**
* GESTrackEffect:bin_description:
*
* The description of the effect bin with a gst-launch-style
* pipeline description.
* exemple: 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_effect_init (GESTrackEffect * self)
{
self->priv =
G_TYPE_INSTANCE_GET_PRIVATE (self, GES_TYPE_TRACK_EFFECT,
GESTrackEffectPrivate);
}
static void
ges_track_effect_dispose (GObject * object)
{
G_OBJECT_CLASS (ges_track_effect_parent_class)->dispose (object);
}
static void
ges_track_effect_finalize (GObject * object)
{
GESTrackEffect *self = GES_TRACK_EFFECT (object);
if (self->priv->bin_description)
g_free (self->priv->bin_description);
G_OBJECT_CLASS (ges_track_effect_parent_class)->finalize (object);
}
static GstElement *
ges_track_effect_create_element (GESTrackObject * object)
{
GstElement *csp, *ret, *effect;
GstPad *src_target, *sink_target;
GstPad *src, *sink;
GError *error = NULL;
GESTrackEffect *self = GES_TRACK_EFFECT (object);
effect =
gst_parse_bin_from_description (self->priv->bin_description, TRUE,
&error);
if (error != NULL)
return NULL;
csp = gst_element_factory_make ("ffmpegcolorspace", NULL);
ret = gst_bin_new ("effect-bin");
gst_bin_add_many (GST_BIN (ret), effect, csp, NULL);
gst_element_link (csp, ret);
src_target = gst_element_get_static_pad (effect, "src");
sink_target = gst_element_get_static_pad (csp, "sink");
src = gst_ghost_pad_new ("src", src_target);
sink = gst_ghost_pad_new ("video_sink", sink_target);
gst_object_unref (src_target);
gst_object_unref (sink_target);
gst_element_add_pad (ret, src);
gst_element_add_pad (ret, sink);
GST_DEBUG ("Created %p", ret);
return ret;
}
GESTrackEffect *
ges_track_effect_new_from_bin_desc (const gchar * bin_description)
{
return g_object_new (GES_TYPE_TRACK_EFFECT, "bin-description",
bin_description, NULL);
}