gstreamer/ges/ges-effect-asset.c

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/* Gstreamer Editing Services
*
* Copyright (C) <2012> Thibault Saunier <thibault.saunier@collabora.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.
*/
/* SECTION: geseffectasset
* @short_description: A GESAsset subclass specialized in GESEffect extraction
2013-06-26 21:08:16 +00:00
*
* This is internal, and implementation details, so we are not showing it in the
* documentation
*/
#include "ges-effect-asset.h"
#include "ges-track-element.h"
#include "ges-internal.h"
G_DEFINE_TYPE (GESEffectAsset, ges_effect_asset, GES_TYPE_TRACK_ELEMENT_ASSET);
struct _GESEffectAssetPrivate
{
gpointer nothing;
};
static void
_fill_track_type (GESAsset * asset)
{
GESTrackType ttype;
gchar *bin_desc;
const gchar *id = ges_asset_get_id (asset);
bin_desc = ges_effect_assect_id_get_type_and_bindesc (id, &ttype, NULL);
if (bin_desc) {
ges_track_element_asset_set_track_type (GES_TRACK_ELEMENT_ASSET (asset),
ttype);
} else {
GST_WARNING_OBJECT (asset, "No track type set, you should"
" specify one in [audio, video] as first component" " in the asset id");
}
}
/* GESAsset virtual methods implementation */
static GESExtractable *
_extract (GESAsset * asset, GError ** error)
{
GESExtractable *effect;
effect = GES_ASSET_CLASS (ges_effect_asset_parent_class)->extract (asset,
error);
if (effect == NULL || (error && *error)) {
effect = NULL;
return NULL;
}
return effect;
}
static void
ges_effect_asset_init (GESEffectAsset * self)
{
self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
GES_TYPE_EFFECT_ASSET, GESEffectAssetPrivate);
}
static void
ges_effect_asset_constructed (GObject * object)
{
_fill_track_type (GES_ASSET (object));
}
static void
ges_effect_asset_finalize (GObject * object)
{
/* TODO: Add deinitalization code here */
G_OBJECT_CLASS (ges_effect_asset_parent_class)->finalize (object);
}
static void
ges_effect_asset_class_init (GESEffectAssetClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GESAssetClass *asset_class = GES_ASSET_CLASS (klass);
g_type_class_add_private (klass, sizeof (GESEffectAssetPrivate));
object_class->finalize = ges_effect_asset_finalize;
object_class->constructed = ges_effect_asset_constructed;
asset_class->extract = _extract;
}
gchar *
ges_effect_assect_id_get_type_and_bindesc (const char *id,
GESTrackType * track_type, GError ** error)
{
GList *tmp;
GstElement *effect;
gchar **typebin_desc = NULL;
gchar *bindesc = NULL;
*track_type = GES_TRACK_TYPE_UNKNOWN;
typebin_desc = g_strsplit (id, " ", 2);
if (!g_strcmp0 (typebin_desc[0], "audio")) {
*track_type = GES_TRACK_TYPE_AUDIO;
bindesc = g_strdup (typebin_desc[1]);
} else if (!g_strcmp0 (typebin_desc[0], "video")) {
*track_type = GES_TRACK_TYPE_VIDEO;
bindesc = g_strdup (typebin_desc[1]);
} else {
bindesc = g_strdup (id);
}
g_strfreev (typebin_desc);
effect = gst_parse_bin_from_description (bindesc, TRUE, error);
if (effect == NULL) {
g_free (bindesc);
GST_ERROR ("Could not create element from: %s", id);
return NULL;
}
if (*track_type != GES_TRACK_TYPE_UNKNOWN) {
gst_object_unref (effect);
return bindesc;
}
for (tmp = GST_BIN_CHILDREN (effect); tmp; tmp = tmp->next) {
GstElementFactory *factory =
gst_element_get_factory (GST_ELEMENT (tmp->data));
const gchar *klass =
gst_element_factory_get_metadata (factory, GST_ELEMENT_METADATA_KLASS);
if (g_strrstr (klass, "Effect")) {
if (g_strrstr (klass, "Audio")) {
*track_type = GES_TRACK_TYPE_AUDIO;
break;
} else if (g_strrstr (klass, "Video")) {
*track_type = GES_TRACK_TYPE_VIDEO;
break;
}
}
}
gst_object_unref (effect);
if (*track_type == GES_TRACK_TYPE_UNKNOWN) {
*track_type = GES_TRACK_TYPE_VIDEO;
GST_ERROR ("Could not determine track type for %s, defaulting to video",
id);
}
return bindesc;
}