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f134968058
Original commit message from CVS: * gst/gstelementfactory.c: * gst/gstpluginfeature.c: * gst/gstpluginfeature.h: * gst/gstregistrybinary.c: * gst/gstregistryxml.c: * gst/gsttypefind.c: Use already-interned string for the private GstPluginFeature plugin_name field.
150 lines
5 KiB
C
150 lines
5 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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*
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* gstpluginfeature.h: Header for base GstPluginFeature
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_PLUGIN_FEATURE_H__
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#define __GST_PLUGIN_FEATURE_H__
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#include <glib-object.h>
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#include <gst/gstobject.h>
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G_BEGIN_DECLS
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#define GST_TYPE_PLUGIN_FEATURE (gst_plugin_feature_get_type())
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#define GST_PLUGIN_FEATURE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PLUGIN_FEATURE, GstPluginFeature))
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#define GST_IS_PLUGIN_FEATURE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PLUGIN_FEATURE))
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#define GST_PLUGIN_FEATURE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PLUGIN_FEATURE, GstPluginFeatureClass))
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#define GST_IS_PLUGIN_FEATURE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PLUGIN_FEATURE))
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#define GST_PLUGIN_FEATURE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_PLUGIN_FEATURE, GstPluginFeatureClass))
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#define GST_PLUGIN_FEATURE_CAST(obj) ((GstPluginFeature*)(obj))
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/**
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* GST_PLUGIN_FEATURE_NAME:
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* @feature: The feature to query
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*
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* Get the name of the feature
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*/
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#define GST_PLUGIN_FEATURE_NAME(feature) (GST_PLUGIN_FEATURE (feature)->name)
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typedef struct _GstPluginFeature GstPluginFeature;
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typedef struct _GstPluginFeatureClass GstPluginFeatureClass;
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/**
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* GstRank:
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* @GST_RANK_NONE: will be chosen last or not at all
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* @GST_RANK_MARGINAL: unlikly to be chosen
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* @GST_RANK_SECONDARY: likely to be chosen
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* @GST_RANK_PRIMARY: will be chosen first
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*
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* Element priority ranks. Defines the order in which the autoplugger (or
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* similar rank-picking mechanisms) will choose this element over an alternative
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* one with the same function.
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*
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* The rank is a unsigned integer ranging from 0 (GST_RANK_NONE) to 256
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* (GST_RANK_PRIMARY). These constants serve as a rough guidiance for defining
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* the rank of a #GstPlugin using gst_plugin_feature_set_rank().
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*/
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typedef enum {
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GST_RANK_NONE = 0,
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GST_RANK_MARGINAL = 64,
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GST_RANK_SECONDARY = 128,
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GST_RANK_PRIMARY = 256
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} GstRank;
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/**
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* GstPluginFeature:
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*
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* Opaque #GstPluginFeature structure.
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*/
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struct _GstPluginFeature {
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GstObject object;
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/*< private >*/
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gboolean loaded;
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gchar *name;
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guint rank;
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const gchar *plugin_name;
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstPluginFeatureClass {
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GstObjectClass parent_class;
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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/**
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* GstTypeNameData:
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* @name: a name
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* @type: a GType
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*
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* Structure used for filtering based on @name and @type.
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*/
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typedef struct {
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const gchar *name;
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GType type;
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} GstTypeNameData;
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/**
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* GstPluginFeatureFilter:
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* @feature: the pluginfeature to check
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* @user_data: the user_data that has been passed on e.g.
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* gst_registry_feature_filter()
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*
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* A function that can be used with e.g. gst_registry_feature_filter()
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* to get a list of pluginfeature that match certain criteria.
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*
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* Returns: %TRUE for a positive match, %FALSE otherwise
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*/
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typedef gboolean (*GstPluginFeatureFilter) (GstPluginFeature *feature,
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gpointer user_data);
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/* normal GObject stuff */
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GType gst_plugin_feature_get_type (void);
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GstPluginFeature *
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gst_plugin_feature_load (GstPluginFeature *feature);
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gboolean gst_plugin_feature_type_name_filter (GstPluginFeature *feature,
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GstTypeNameData *data);
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void gst_plugin_feature_set_rank (GstPluginFeature *feature, guint rank);
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void gst_plugin_feature_set_name (GstPluginFeature *feature, const gchar *name);
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guint gst_plugin_feature_get_rank (GstPluginFeature *feature);
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G_CONST_RETURN gchar *gst_plugin_feature_get_name (GstPluginFeature *feature);
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void gst_plugin_feature_list_free (GList *list);
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gboolean gst_plugin_feature_check_version (GstPluginFeature *feature,
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guint min_major,
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guint min_minor,
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guint min_micro);
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G_END_DECLS
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#endif /* __GST_PLUGIN_FEATURE_H__ */
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