gstreamer/gst/gstplugin.h
Wim Taymans eb5536af92 - Added infrastructure to run a filter against plugins, registries and registrypools. This makes it possible to creat...
Original commit message from CVS:
- Added infrastructure to run a filter against plugins, registries and
registrypools. This makes it possible to create custom code to filter
out the plugins/features you're interested in.
2003-04-14 18:53:03 +00:00

140 lines
4.6 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstplugin.h: Header for plugin subsystem
*
* 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_H__
#define __GST_PLUGIN_H__
#include <gst/gstconfig.h>
#include <gmodule.h>
#include <gst/gstpluginfeature.h>
#include <gst/gstmacros.h>
G_BEGIN_DECLS
GQuark gst_plugin_error_quark (void);
#define GST_PLUGIN_ERROR gst_plugin_error_quark ()
typedef enum
{
GST_PLUGIN_ERROR_MODULE,
GST_PLUGIN_ERROR_DEPENDENCIES
} GstPluginError;
#define GST_PLUGIN(plugin) ((GstPlugin *) (plugin))
typedef struct _GstPlugin GstPlugin;
typedef struct _GstPluginDesc GstPluginDesc;
struct _GstPlugin {
gchar *name; /* name of the plugin */
gchar *longname; /* long name of plugin */
gchar *filename; /* filename it came from */
GList *features; /* list of features provided */
gint numfeatures;
gpointer manager; /* managing registry */
GModule *module; /* contains the module if the plugin is loaded */
gboolean init_called; /* if the init function has been called */
};
/* Initialiser function: returns TRUE if plugin initialised successfully */
typedef gboolean (*GstPluginInitFunc) (GModule *module, GstPlugin *plugin);
struct _GstPluginDesc {
gint major_version; /* major version of core that plugin was compiled for */
gint minor_version; /* minor version of core that plugin was compiled for */
gchar *name; /* name of plugin */
GstPluginInitFunc plugin_init; /* pointer to plugin_init function */
};
#ifndef GST_PLUGIN_STATIC
#define GST_PLUGIN_DESC_DYNAMIC(major,minor,name,init) \
GstPluginDesc plugin_desc = { \
major, \
minor, \
name, \
init \
};
#else
#define GST_PLUGIN_DESC_DYNAMIC(major,minor,name,init)
#endif
#define GST_PLUGIN_DESC_STATIC(major,minor,name,init) \
static void GST_GNUC_CONSTRUCTOR \
_gst_plugin_static_init__ ##init (void) \
{ \
static GstPluginDesc plugin_desc_ = { \
major, \
minor, \
name, \
init \
}; \
_gst_plugin_register_static (&plugin_desc_); \
}
#define GST_PLUGIN_DESC(major,minor,name,init) \
GST_PLUGIN_DESC_DYNAMIC (major,minor,name,init) \
GST_PLUGIN_DESC_STATIC (major,minor,name,init)
/* function for filters */
typedef gboolean (*GstPluginFilter) (GstPlugin *plugin,
gpointer user_data);
void _gst_plugin_initialize (void);
void _gst_plugin_register_static (GstPluginDesc *desc);
GstPlugin* gst_plugin_new (const gchar *filename);
const gchar* gst_plugin_get_name (GstPlugin *plugin);
void gst_plugin_set_name (GstPlugin *plugin, const gchar *name);
const gchar* gst_plugin_get_longname (GstPlugin *plugin);
void gst_plugin_set_longname (GstPlugin *plugin, const gchar *longname);
const gchar* gst_plugin_get_filename (GstPlugin *plugin);
gboolean gst_plugin_is_loaded (GstPlugin *plugin);
GList* gst_plugin_feature_filter (GstPlugin *plugin,
GstPluginFeatureFilter filter,
gboolean first,
gpointer user_data);
GList* gst_plugin_list_feature_filter (GList *list,
GstPluginFeatureFilter filter,
gboolean first,
gpointer user_data);
gboolean gst_plugin_name_filter (GstPlugin *plugin, const gchar *name);
GList* gst_plugin_get_feature_list (GstPlugin *plugin);
GstPluginFeature* gst_plugin_find_feature (GstPlugin *plugin, const gchar *name, GType type);
gboolean gst_plugin_load_plugin (GstPlugin *plugin, GError** error);
gboolean gst_plugin_unload_plugin (GstPlugin *plugin);
void gst_plugin_add_feature (GstPlugin *plugin, GstPluginFeature *feature);
/* shortcuts to load from the registry pool */
gboolean gst_plugin_load (const gchar *name);
gboolean gst_library_load (const gchar *name);
G_END_DECLS
#endif /* __GST_PLUGIN_H__ */