diff -r 000000000000 -r 0e761a78d257 gstreamer_core/gst/gstpluginfeature.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gstreamer_core/gst/gstpluginfeature.h Thu Dec 17 08:53:32 2009 +0200 @@ -0,0 +1,186 @@ +/* GStreamer + * Copyright (C) 1999,2000 Erik Walthinsen + * 2000 Wim Taymans + * + * 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., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + + +#ifndef __GST_PLUGIN_FEATURE_H__ +#define __GST_PLUGIN_FEATURE_H__ + +#include +#include + +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)) + +/** + * GST_PLUGIN_FEATURE_NAME: + * @feature: The feature to query + * + * Get the name of the feature + */ +#define GST_PLUGIN_FEATURE_NAME(feature) (GST_PLUGIN_FEATURE (feature)->name) + +typedef struct _GstPluginFeature GstPluginFeature; +typedef struct _GstPluginFeatureClass GstPluginFeatureClass; + +/** + * GstRank: + * @GST_RANK_NONE: will be chosen last or not at all + * @GST_RANK_MARGINAL: unlikly 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; + +/** + * GstPluginFeature: + * + * Opaque #GstPluginFeature structure. + */ +struct _GstPluginFeature { + GstObject object; + + /*< private >*/ + gboolean loaded; + gchar *name; + guint rank; + + const gchar *plugin_name; + + /*< private >*/ + gpointer _gst_reserved[GST_PADDING]; +}; + +struct _GstPluginFeatureClass { + GstObjectClass parent_class; + + /*< private >*/ + gpointer _gst_reserved[GST_PADDING]; +}; + +/** + * GstTypeNameData: + * @name: a name + * @type: a GType + * + * Structure used for filtering based on @name and @type. + */ +typedef struct { + const gchar *name; + GType type; +} GstTypeNameData; + +/** + * 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 */ +#ifdef __SYMBIAN32__ +IMPORT_C +#endif + +GType gst_plugin_feature_get_type (void); +#ifdef __SYMBIAN32__ +IMPORT_C +#endif + + +GstPluginFeature * + gst_plugin_feature_load (GstPluginFeature *feature); +#ifdef __SYMBIAN32__ +IMPORT_C +#endif + + +gboolean gst_plugin_feature_type_name_filter (GstPluginFeature *feature, + GstTypeNameData *data); +#ifdef __SYMBIAN32__ +IMPORT_C +#endif + + +void gst_plugin_feature_set_rank (GstPluginFeature *feature, guint rank); +#ifdef __SYMBIAN32__ +IMPORT_C +#endif + +void gst_plugin_feature_set_name (GstPluginFeature *feature, const gchar *name); +#ifdef __SYMBIAN32__ +IMPORT_C +#endif + +guint gst_plugin_feature_get_rank (GstPluginFeature *feature); +#ifdef __SYMBIAN32__ +IMPORT_C +#endif + +G_CONST_RETURN gchar *gst_plugin_feature_get_name (GstPluginFeature *feature); +#ifdef __SYMBIAN32__ +IMPORT_C +#endif + + +void gst_plugin_feature_list_free (GList *list); +#ifdef __SYMBIAN32__ +IMPORT_C +#endif + + +gboolean gst_plugin_feature_check_version (GstPluginFeature *feature, + guint min_major, + guint min_minor, + guint min_micro); + +G_END_DECLS + + +#endif /* __GST_PLUGIN_FEATURE_H__ */ +