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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstpluginfeature.h: Header for base GstPluginFeature
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_PLUGIN_FEATURE_H__
#define __GST_PLUGIN_FEATURE_H__
#include <glib-object.h>
#include <gst/gstobject.h>
#include <gst/gstplugin.h>
G_BEGIN_DECLS
#define GST_TYPE_PLUGIN_FEATURE (gst_plugin_feature_get_type())
#define GST_PLUGIN_FEATURE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PLUGIN_FEATURE, GstPluginFeature))
#define GST_IS_PLUGIN_FEATURE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PLUGIN_FEATURE))
#define GST_PLUGIN_FEATURE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PLUGIN_FEATURE, GstPluginFeatureClass))
#define GST_IS_PLUGIN_FEATURE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PLUGIN_FEATURE))
#define GST_PLUGIN_FEATURE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_PLUGIN_FEATURE, GstPluginFeatureClass))
#define GST_PLUGIN_FEATURE_CAST(obj) ((GstPluginFeature*)(obj))
/**
* GstPluginFeature:
*
* Opaque #GstPluginFeature structure.
*/
typedef struct _GstPluginFeature GstPluginFeature;
typedef struct _GstPluginFeatureClass GstPluginFeatureClass;
/**
* GstRank:
* @GST_RANK_NONE: will be chosen last or not at all
* @GST_RANK_MARGINAL: unlikely to be chosen
* @GST_RANK_SECONDARY: likely to be chosen
* @GST_RANK_PRIMARY: will be chosen first
*
* Element priority ranks. Defines the order in which the autoplugger (or
* similar rank-picking mechanisms, such as e.g. gst_element_make_from_uri())
* will choose this element over an alternative one with the same function.
*
* These constants serve as a rough guidance for defining the rank of a
* #GstPluginFeature. Any value is valid, including values bigger than
* @GST_RANK_PRIMARY.
*/
typedef enum {
GST_RANK_NONE = 0,
GST_RANK_MARGINAL = 64,
GST_RANK_SECONDARY = 128,
GST_RANK_PRIMARY = 256
} GstRank;
/**
* gst_plugin_feature_get_name:
* @feature: a #GstPluginFeature to get the name of @feature.
*
* Returns the name of @feature.
* For a nameless plugin feature, this returns %NULL.
*
* Returns: (transfer none) (nullable): the name of @feature. MT safe.
*
*/
#define gst_plugin_feature_get_name(feature) GST_OBJECT_NAME(feature)
/**
* gst_plugin_feature_set_name:
* @feature: a #GstPluginFeature to set the name of.
* @name: the new name
*
* Sets the name of the plugin feature, getting rid of the old name if there was one.
*/
#define gst_plugin_feature_set_name(feature,name) gst_object_set_name(GST_OBJECT_CAST(feature),name)
/**
* GstPluginFeatureFilter:
* @feature: the pluginfeature to check
* @user_data: the user_data that has been passed on e.g.
* gst_registry_feature_filter()
*
* A function that can be used with e.g. gst_registry_feature_filter()
* to get a list of pluginfeature that match certain criteria.
*
* Returns: %TRUE for a positive match, %FALSE otherwise
*/
typedef gboolean (*GstPluginFeatureFilter) (GstPluginFeature *feature,
gpointer user_data);
/* normal GObject stuff */
GType gst_plugin_feature_get_type (void);
GstPluginFeature *
gst_plugin_feature_load (GstPluginFeature *feature);
void gst_plugin_feature_set_rank (GstPluginFeature *feature, guint rank);
guint gst_plugin_feature_get_rank (GstPluginFeature *feature);
GstPlugin * gst_plugin_feature_get_plugin (GstPluginFeature *feature);
const gchar * gst_plugin_feature_get_plugin_name (GstPluginFeature *feature);
void gst_plugin_feature_list_free (GList *list);
GList *gst_plugin_feature_list_copy (GList *list) G_GNUC_MALLOC;
void gst_plugin_feature_list_debug (GList *list);
/**
* GST_PLUGIN_FEATURE_LIST_DEBUG:
* @list: (transfer none) (element-type Gst.PluginFeature): a #GList of
* plugin features
*
* Debug the plugin feature names in @list.
*/
#ifndef GST_DISABLE_GST_DEBUG
#define GST_PLUGIN_FEATURE_LIST_DEBUG(list) gst_plugin_feature_list_debug(list)
#else
#define GST_PLUGIN_FEATURE_LIST_DEBUG(list)
#endif
gboolean gst_plugin_feature_check_version (GstPluginFeature *feature,
guint min_major,
guint min_minor,
guint min_micro);
gint gst_plugin_feature_rank_compare_func (gconstpointer p1,
gconstpointer p2);
#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstPluginFeature, gst_object_unref)
#endif
G_END_DECLS
#endif /* __GST_PLUGIN_FEATURE_H__ */
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