author | hgs |
Fri, 14 May 2010 18:43:44 -0500 | |
changeset 20 | 7e3786c5ed27 |
parent 19 | 24ed0baaf8e5 |
permissions | -rw-r--r-- |
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/* 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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* gstplugin.h: Header for plugin subsystem |
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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_H__ |
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#define __GST_PLUGIN_H__ |
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#include <gst/gstconfig.h> |
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#include <time.h> /* time_t */ |
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#include <sys/types.h> /* off_t */ |
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#include <sys/stat.h> /* off_t */ |
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#include <gmodule.h> |
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#include <gst/gstobject.h> |
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#include <gst/gstmacros.h> |
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#include <gst/gststructure.h> |
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G_BEGIN_DECLS |
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typedef struct _GstPlugin GstPlugin; |
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typedef struct _GstPluginClass GstPluginClass; |
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typedef struct _GstPluginPrivate GstPluginPrivate; |
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typedef struct _GstPluginDesc GstPluginDesc; |
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/** |
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* gst_plugin_error_quark: |
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* |
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* Get the error quark. |
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* |
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* Returns: The error quark used in GError messages |
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*/ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GQuark gst_plugin_error_quark (void); |
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/** |
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* GST_PLUGIN_ERROR: |
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* |
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* The error message category quark |
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*/ |
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#define GST_PLUGIN_ERROR gst_plugin_error_quark () |
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/** |
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* GstPluginError: |
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* @GST_PLUGIN_ERROR_MODULE: The plugin could not be loaded |
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* @GST_PLUGIN_ERROR_DEPENDENCIES: The plugin has unresolved dependencies |
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* @GST_PLUGIN_ERROR_NAME_MISMATCH: The plugin has already be loaded from a different file |
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* |
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* The plugin loading errors |
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*/ |
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typedef enum |
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{ |
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GST_PLUGIN_ERROR_MODULE, |
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GST_PLUGIN_ERROR_DEPENDENCIES, |
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GST_PLUGIN_ERROR_NAME_MISMATCH |
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} GstPluginError; |
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typedef enum |
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{ |
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GST_PLUGIN_FLAG_CACHED = (1<<0) |
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} GstPluginFlags; |
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/** |
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* GstPluginDependencyFlags: |
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* @GST_PLUGIN_DEPENDENCY_FLAG_NONE : no special flags |
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* @GST_PLUGIN_DEPENDENCY_FLAG_RECURSE : recurse into subdirectories |
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* @GST_PLUGIN_DEPENDENCY_FLAG_PATHS_ARE_DEFAULT_ONLY : use paths |
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* argument only if none of the environment variables is set |
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* @GST_PLUGIN_DEPENDENCY_FLAG_FILE_NAME_IS_SUFFIX : interpret |
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* filename argument as filter suffix and check all matching files in |
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* the directory |
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* |
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* Flags used in connection with gst_plugin_add_dependency(). |
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* |
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* Since: 0.10.22 |
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*/ |
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typedef enum { |
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GST_PLUGIN_DEPENDENCY_FLAG_NONE = 0, |
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GST_PLUGIN_DEPENDENCY_FLAG_RECURSE = (1 << 0), |
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GST_PLUGIN_DEPENDENCY_FLAG_PATHS_ARE_DEFAULT_ONLY = (1 << 1), |
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GST_PLUGIN_DEPENDENCY_FLAG_FILE_NAME_IS_SUFFIX = (1 << 2) |
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} GstPluginDependencyFlags; |
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/** |
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* GstPluginInitFunc: |
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* @plugin: The plugin object that can be used to register #GstPluginFeatures for this plugin. |
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* |
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* A plugin should provide a pointer to a function of this type in the |
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* plugin_desc struct. |
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* This function will be called by the loader at startup. |
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* |
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* Returns: %TRUE if plugin initialised successfully |
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*/ |
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typedef gboolean (*GstPluginInitFunc) (GstPlugin *plugin); |
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/** |
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* GstPluginInitFullFunc: |
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* @plugin: The plugin object that can be used to register #GstPluginFeatures for this plugin. |
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* @user_data: The user data. |
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* |
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* A plugin should provide a pointer to a function of either #GstPluginInitFunc |
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* or this type in the plugin_desc struct. |
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* The function will be called by the loader at startup. This version allows |
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* user data to be passed to init function (useful for bindings). |
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* |
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* Returns: %TRUE if plugin initialised successfully |
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* |
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* Since: 0.10.24 |
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* |
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*/ |
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typedef gboolean (*GstPluginInitFullFunc) (GstPlugin *plugin, gpointer user_data); |
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/** |
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* GstPluginDesc: |
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* @major_version: the major version number of core that plugin was compiled for |
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* @minor_version: the minor version number of core that plugin was compiled for |
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* @name: a unique name of the plugin |
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* @description: description of plugin |
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* @plugin_init: pointer to the init function of this plugin. |
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* @version: version of the plugin |
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* @license: effective license of plugin |
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* @source: source module plugin belongs to |
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* @package: shipped package plugin belongs to |
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* @origin: URL to provider of plugin |
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* @_gst_reserved: private, for later expansion |
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* |
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* A plugin should export a variable of this type called plugin_desc. The plugin |
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* loader will use the data provided there to initialize the plugin. |
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* |
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* The @licence parameter must be one of: LGPL, GPL, QPL, GPL/QPL, MPL, |
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* BSD, MIT/X11, Proprietary, unknown. |
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*/ |
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struct _GstPluginDesc { |
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gint major_version; |
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gint minor_version; |
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const gchar *name; |
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gchar *description; |
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GstPluginInitFunc plugin_init; |
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const gchar *version; |
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const gchar *license; |
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const gchar *source; |
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const gchar *package; |
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const gchar *origin; |
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|
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gpointer _gst_reserved[GST_PADDING]; |
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}; |
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168 |
|
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169 |
|
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#define GST_TYPE_PLUGIN (gst_plugin_get_type()) |
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#define GST_IS_PLUGIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PLUGIN)) |
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#define GST_IS_PLUGIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PLUGIN)) |
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#define GST_PLUGIN_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_PLUGIN, GstPluginClass)) |
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#define GST_PLUGIN(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PLUGIN, GstPlugin)) |
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#define GST_PLUGIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PLUGIN, GstPluginClass)) |
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#define GST_PLUGIN_CAST(obj) ((GstPlugin*)(obj)) |
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|
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/** |
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* GstPlugin: |
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* |
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* The plugin object |
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*/ |
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struct _GstPlugin { |
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GstObject object; |
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/*< private >*/ |
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GstPluginDesc desc; |
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|
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GstPluginDesc *orig_desc; |
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unsigned int flags; |
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|
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gchar * filename; |
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gchar * basename; /* base name (non-dir part) of plugin path */ |
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GModule * module; /* contains the module if plugin is loaded */ |
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off_t file_size; |
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time_t file_mtime; |
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gboolean registered; /* TRUE when the registry has seen a filename |
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* that matches the plugin's basename */ |
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|
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GstPluginPrivate *priv; |
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gpointer _gst_reserved[GST_PADDING - 1]; |
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}; |
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struct _GstPluginClass { |
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GstObjectClass object_class; |
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|
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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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* GST_PLUGIN_DEFINE: |
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* @major: major version number of the gstreamer-core that plugin was compiled for |
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* @minor: minor version number of the gstreamer-core that plugin was compiled for |
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* @name: short, but unique name of the plugin |
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* @description: information about the purpose of the plugin |
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* @init: function pointer to the plugin_init method with the signature of <code>static gboolean plugin_init (GstPlugin * plugin)</code>. |
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* @version: full version string (e.g. VERSION from config.h) |
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* @license: under which licence the package has been released, e.g. GPL, LGPL. |
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* @package: the package-name (e.g. PACKAGE_NAME from config.h) |
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* @origin: a description from where the package comes from (e.g. the homepage URL) |
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* |
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* This macro needs to be used to define the entry point and meta data of a |
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* plugin. One would use this macro to export a plugin, so that it can be used |
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* by other applications. |
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* |
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* The macro uses a define named PACKAGE for the #GstPluginDesc,source field. |
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*/ |
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#define GST_PLUGIN_DEFINE(major,minor,name,description,init,version,license,package,origin) \ |
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GST_PLUGIN_EXPORT GstPluginDesc gst_plugin_desc = { \ |
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major, \ |
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minor, \ |
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name, \ |
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(gchar *) description, \ |
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init, \ |
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version, \ |
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license, \ |
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PACKAGE, \ |
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package, \ |
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origin, \ |
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GST_PADDING_INIT \ |
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}; |
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|
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/** |
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* GST_PLUGIN_DEFINE_STATIC: |
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* @major: major version number of the gstreamer-core that plugin was compiled for |
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* @minor: minor version number of the gstreamer-core that plugin was compiled for |
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* @name: short, but unique name of the plugin |
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* @description: information about the purpose of the plugin |
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* @init: function pointer to the plugin_init method with the signature of <code>static gboolean plugin_init (GstPlugin * plugin)</code>. |
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* @version: full version string (e.g. VERSION from config.h) |
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* @license: under which licence the package has been released, e.g. GPL, LGPL. |
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* @package: the package-name (e.g. PACKAGE_NAME from config.h) |
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* @origin: a description from where the package comes from (e.g. the homepage URL) |
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* |
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* This macro needs to be used to define the entry point and meta data of a |
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* local plugin. One would use this macro to define a local plugin that can only |
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* be used by the own application. |
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* |
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* The macro uses a define named PACKAGE for the #GstPluginDesc.source field. |
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* |
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* Deprecated: Use gst_plugin_register_static() instead. This macro was |
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* deprecated because it uses constructors, which is a compiler feature not |
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* available on all compilers. |
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* |
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*/ |
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/* We don't have deprecation guards here on purpose, it's enough to have |
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* deprecation guards around _gst_plugin_register_static(), and will result in |
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* much better error messages when compiling with -DGST_DISABLE_DEPRECATED */ |
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#define GST_PLUGIN_DEFINE_STATIC(major,minor,name,description,init,version,license,package,origin) \ |
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static void GST_GNUC_CONSTRUCTOR \ |
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_gst_plugin_static_init__ ##init (void) \ |
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{ \ |
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static GstPluginDesc plugin_desc_ = { \ |
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major, \ |
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minor, \ |
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name, \ |
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(gchar *) description, \ |
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init, \ |
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version, \ |
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license, \ |
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PACKAGE, \ |
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package, \ |
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origin, \ |
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GST_PADDING_INIT \ |
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}; \ |
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_gst_plugin_register_static (&plugin_desc_); \ |
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} |
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|
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/** |
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* GST_LICENSE_UNKNOWN: |
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* |
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* To be used in GST_PLUGIN_DEFINE or GST_PLUGIN_DEFINE_STATIC if usure about |
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* the licence. |
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*/ |
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#define GST_LICENSE_UNKNOWN "unknown" |
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|
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|
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/* function for filters */ |
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/** |
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* GstPluginFilter: |
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* @plugin: the plugin to check |
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* @user_data: the user_data that has been passed on e.g. gst_registry_plugin_filter() |
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* |
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* A function that can be used with e.g. gst_registry_plugin_filter() |
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* to get a list of plugins 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 (*GstPluginFilter) (GstPlugin *plugin, |
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gpointer user_data); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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|
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GType gst_plugin_get_type (void); |
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|
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#ifndef GST_DISABLE_DEPRECATED |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void _gst_plugin_register_static (GstPluginDesc *desc); |
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#endif |
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|
19 | 329 |
#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gboolean gst_plugin_register_static (gint major_version, |
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gint minor_version, |
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const gchar *name, |
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gchar *description, |
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GstPluginInitFunc init_func, |
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const gchar *version, |
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const gchar *license, |
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const gchar *source, |
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const gchar *package, |
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const gchar *origin); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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|
16 | 347 |
gboolean gst_plugin_register_static_full (gint major_version, |
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gint minor_version, |
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const gchar *name, |
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gchar *description, |
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GstPluginInitFullFunc init_full_func, |
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const gchar *version, |
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const gchar *license, |
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const gchar *source, |
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const gchar *package, |
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const gchar *origin, |
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gpointer user_data); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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||
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||
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G_CONST_RETURN gchar* gst_plugin_get_name (GstPlugin *plugin); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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G_CONST_RETURN gchar* gst_plugin_get_description (GstPlugin *plugin); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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G_CONST_RETURN gchar* gst_plugin_get_filename (GstPlugin *plugin); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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G_CONST_RETURN gchar* gst_plugin_get_version (GstPlugin *plugin); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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G_CONST_RETURN gchar* gst_plugin_get_license (GstPlugin *plugin); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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G_CONST_RETURN gchar* gst_plugin_get_source (GstPlugin *plugin); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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G_CONST_RETURN gchar* gst_plugin_get_package (GstPlugin *plugin); |
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#ifdef __SYMBIAN32__ |
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#endif |
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|
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G_CONST_RETURN gchar* gst_plugin_get_origin (GstPlugin *plugin); |
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#endif |
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G_CONST_RETURN GstStructure* gst_plugin_get_cache_data (GstPlugin * plugin); |
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void gst_plugin_set_cache_data (GstPlugin * plugin, GstStructure *cache_data); |
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||
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GModule * gst_plugin_get_module (GstPlugin *plugin); |
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#endif |
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gboolean gst_plugin_is_loaded (GstPlugin *plugin); |
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gboolean gst_plugin_name_filter (GstPlugin *plugin, const gchar *name); |
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GstPlugin * gst_plugin_load_file (const gchar *filename, GError** error); |
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|
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GstPlugin * gst_plugin_load (GstPlugin *plugin); |
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#endif |
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GstPlugin * gst_plugin_load_by_name (const gchar *name); |
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void gst_plugin_add_dependency (GstPlugin * plugin, |
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const gchar ** env_vars, |
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const gchar ** paths, |
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const gchar ** names, |
|
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GstPluginDependencyFlags flags); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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||
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||
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void gst_plugin_add_dependency_simple (GstPlugin * plugin, |
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const gchar * env_vars, |
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const gchar * paths, |
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const gchar * names, |
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GstPluginDependencyFlags flags); |
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#ifdef __SYMBIAN32__ |
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#endif |
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||
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void gst_plugin_list_free (GList *list); |
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G_END_DECLS |
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#endif /* __GST_PLUGIN_H__ */ |