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Original commit message from CVS: * gst/gst_private.h: * gst/gstbus.c: * gst/gstelement.c: * gst/gstinfo.c: * gst/gstpluginfeature.c: widen the debug category in output to fit the biggest one we have add a bus category and use it play with the colors fix up some categories
234 lines
6.3 KiB
C
234 lines
6.3 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.c: Abstract base class for all plugin features
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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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/**
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* SECTION:gstpluginfeature
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* @short_description: Base class for contents of a GstPlugin
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* @see_also: #GstPlugin
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*
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* This is a base class for anything that can be added to a #GstPlugin.
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*/
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#include "gst_private.h"
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#include "gstpluginfeature.h"
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#include "gstplugin.h"
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#include "gstregistry.h"
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#include "gstinfo.h"
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#include <string.h>
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#define GST_CAT_DEFAULT GST_CAT_PLUGIN_LOADING
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static void gst_plugin_feature_class_init (GstPluginFeatureClass * klass);
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static void gst_plugin_feature_init (GstPluginFeature * feature);
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static void gst_plugin_feature_finalize (GObject * object);
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/* static guint gst_plugin_feature_signals[LAST_SIGNAL] = { 0 }; */
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G_DEFINE_ABSTRACT_TYPE (GstPluginFeature, gst_plugin_feature, GST_TYPE_OBJECT);
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GstObjectClass *parent_class = NULL;
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static void
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gst_plugin_feature_class_init (GstPluginFeatureClass * klass)
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{
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parent_class = g_type_class_ref (GST_TYPE_OBJECT);
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G_OBJECT_CLASS (klass)->finalize =
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GST_DEBUG_FUNCPTR (gst_plugin_feature_finalize);
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}
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static void
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gst_plugin_feature_init (GstPluginFeature * feature)
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{
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}
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static void
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gst_plugin_feature_finalize (GObject * object)
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{
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GstPluginFeature *feature = GST_PLUGIN_FEATURE (object);
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GST_DEBUG ("finalizing feature %p", feature);
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g_free (feature->name);
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g_free (feature->plugin_name);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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/**
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* gst_plugin_feature_load:
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* @feature: the plugin feature to check
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*
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* Loads the plugin containing @feature if it's not already loaded. @feature is
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* unaffected; use the return value instead.
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*
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* Normally this function is used like this:
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*
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* <programlisting>
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* GstPluginFeature *loaded_feature;
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* loaded_feature = gst_plugin_feature_load (feature);
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* // presumably, we're no longer interested in the potentially-unloaded feature
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* gst_object_unref (feature);
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* feature = loaded_feature;
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* </programlisting>
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*
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* Returns: A reference to the loaded feature, or NULL on error.
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*/
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GstPluginFeature *
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gst_plugin_feature_load (GstPluginFeature * feature)
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{
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GstPlugin *plugin;
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GstPluginFeature *real_feature;
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g_return_val_if_fail (feature != NULL, FALSE);
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g_return_val_if_fail (GST_IS_PLUGIN_FEATURE (feature), FALSE);
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GST_DEBUG ("loading plugin for feature %p", feature);
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if (feature->loaded)
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return feature;
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GST_DEBUG ("loading plugin %s", feature->plugin_name);
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plugin = gst_plugin_load_by_name (feature->plugin_name);
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if (!plugin) {
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g_critical ("Failed to load plugin containing feature '%s'.",
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GST_PLUGIN_FEATURE_NAME (feature));
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return NULL;
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}
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GST_DEBUG ("loaded plugin %s", feature->plugin_name);
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gst_object_unref (plugin);
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real_feature =
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gst_registry_lookup_feature (gst_registry_get_default (), feature->name);
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if (real_feature == NULL) {
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GST_INFO
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("Loaded plugin containing feature '%s', but feature disappeared.",
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feature->name);
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} else if (!real_feature->loaded) {
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GST_INFO ("Tried to load plugin containing feature '%s', but feature was "
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"not found.", real_feature->name);
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return NULL;
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}
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return real_feature;
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}
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gboolean
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gst_plugin_feature_type_name_filter (GstPluginFeature * feature,
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GstTypeNameData * data)
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{
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return ((data->type == 0 || data->type == G_OBJECT_TYPE (feature)) &&
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(data->name == NULL
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|| !strcmp (data->name, GST_PLUGIN_FEATURE_NAME (feature))));
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}
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/**
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* gst_plugin_feature_set_name:
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* @feature: a feature
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* @name: the name to set
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*
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* Sets the name of a plugin feature. The name uniquely identifies a feature
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* within all features of the same type. Renaming a plugin feature is not
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* allowed. A copy is made of the name so you should free the supplied @name
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* after calling this function.
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*/
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void
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gst_plugin_feature_set_name (GstPluginFeature * feature, const gchar * name)
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{
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g_return_if_fail (GST_IS_PLUGIN_FEATURE (feature));
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g_return_if_fail (name != NULL);
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if (feature->name) {
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g_return_if_fail (strcmp (feature->name, name) == 0);
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} else {
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feature->name = g_strdup (name);
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}
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gst_object_set_name (GST_OBJECT (feature), feature->name);
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}
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/**
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* gst_plugin_feature_get_name:
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* @feature: a feature
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*
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* Gets the name of a plugin feature.
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*
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* Returns: the name
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*/
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G_CONST_RETURN gchar *
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gst_plugin_feature_get_name (GstPluginFeature * feature)
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{
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g_return_val_if_fail (GST_IS_PLUGIN_FEATURE (feature), NULL);
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return feature->name;
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}
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/**
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* gst_plugin_feature_set_rank:
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* @feature: feature to rank
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* @rank: rank value - higher number means more priority rank
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*
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* Specifies a rank for a plugin feature, so that autoplugging uses
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* the most appropriate feature.
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*/
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void
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gst_plugin_feature_set_rank (GstPluginFeature * feature, guint rank)
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{
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g_return_if_fail (feature != NULL);
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g_return_if_fail (GST_IS_PLUGIN_FEATURE (feature));
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feature->rank = rank;
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}
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/**
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* gst_plugin_feature_get rank:
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* @feature: a feature
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*
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* Gets the rank of a plugin feature.
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*
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* Returns: The rank of the feature
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*/
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guint
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gst_plugin_feature_get_rank (GstPluginFeature * feature)
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{
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g_return_val_if_fail (GST_IS_PLUGIN_FEATURE (feature), GST_RANK_NONE);
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return feature->rank;
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}
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/**
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* gst_plugin_feature_list_free:
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* @list: list of #GstPluginFeature
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*
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* Unrefs each member of @list, then frees the list.
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*/
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void
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gst_plugin_feature_list_free (GList * list)
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{
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GList *g;
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for (g = list; g; g = g->next) {
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GstPluginFeature *feature = GST_PLUGIN_FEATURE (g->data);
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gst_object_unref (feature);
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}
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g_list_free (list);
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}
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