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193 lines
4.8 KiB
C
193 lines
4.8 KiB
C
/*
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* Copyright (C) 2010 Ole André Vadla Ravnås <oleavr@soundrop.com>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "dynapi.h"
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#include "dynapi-internal.h"
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#include <gmodule.h>
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#include <gst/gst.h>
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GST_DEBUG_CATEGORY (gst_dyn_api_debug);
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#define GST_CAT_DEFAULT gst_dyn_api_debug
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enum
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{
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PROP_0,
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PROP_FILENAME
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};
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struct _GstDynApiPrivate
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{
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gchar *filename;
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GModule *module;
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};
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G_DEFINE_TYPE (GstDynApi, gst_dyn_api, G_TYPE_OBJECT);
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static void
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gst_dyn_api_init (GstDynApi * self)
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{
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self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_DYN_API,
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GstDynApiPrivate);
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}
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static void
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gst_dyn_api_dispose (GObject * object)
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{
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GstDynApi *self = GST_DYN_API_CAST (object);
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GstDynApiPrivate *priv = self->priv;
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if (priv->module != NULL) {
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g_module_close (priv->module);
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priv->module = NULL;
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}
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G_OBJECT_CLASS (gst_dyn_api_parent_class)->dispose (object);
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}
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static void
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gst_dyn_api_finalize (GObject * object)
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{
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GstDynApi *self = GST_DYN_API_CAST (object);
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GstDynApiPrivate *priv = self->priv;
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g_free (priv->filename);
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G_OBJECT_CLASS (gst_dyn_api_parent_class)->finalize (object);
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}
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static void
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gst_dyn_api_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstDynApi *self = GST_DYN_API (object);
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switch (prop_id) {
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case PROP_FILENAME:
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g_value_set_string (value, self->priv->filename);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_dyn_api_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstDynApi *self = GST_DYN_API (object);
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switch (prop_id) {
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case PROP_FILENAME:
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g_free (self->priv->filename);
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self->priv->filename = g_value_dup_string (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_dyn_api_class_init (GstDynApiClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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gobject_class->dispose = gst_dyn_api_dispose;
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gobject_class->finalize = gst_dyn_api_finalize;
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gobject_class->get_property = gst_dyn_api_get_property;
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gobject_class->set_property = gst_dyn_api_set_property;
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g_type_class_add_private (klass, sizeof (GstDynApiPrivate));
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g_object_class_install_property (gobject_class, PROP_FILENAME,
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g_param_spec_string ("filename", "Filename", "Filename", NULL,
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G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
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}
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gpointer
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_gst_dyn_api_new (GType derived_type, const gchar * filename,
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const GstDynSymSpec * symbols, GError ** error)
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{
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GstDynApi *api;
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GstDynApiPrivate *priv;
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guint i;
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GArray *names_not_found;
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api = g_object_new (derived_type, "filename", filename, NULL);
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priv = api->priv;
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priv->module = g_module_open (priv->filename, 0);
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if (priv->module == NULL)
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goto open_failed;
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names_not_found = g_array_new (TRUE, FALSE, sizeof (gchar *));
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for (i = 0; symbols[i].name != NULL; i++) {
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const GstDynSymSpec *s = &symbols[i];
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if (!g_module_symbol (priv->module, s->name,
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(gpointer *) (((guint8 *) api) + s->offset)) && s->is_required) {
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g_array_append_val (names_not_found, s->name);
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}
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}
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if (names_not_found->len > 0)
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goto one_or_more_name_not_found;
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g_array_free (names_not_found, TRUE);
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return api;
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/* ERRORS */
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open_failed:
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{
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gchar *basename;
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basename = g_path_get_basename (filename);
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g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_FAILED,
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"failed to open %s", basename);
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g_free (basename);
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goto any_error;
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}
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one_or_more_name_not_found:
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{
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gchar *basename, *names_joined;
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basename = g_path_get_basename (filename);
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names_joined = g_strjoinv (", ", (gchar **) names_not_found->data);
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g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_FAILED,
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"missing %u symbol%s in %s: %s",
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names_not_found->len, (names_not_found->len == 1) ? "" : "s",
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basename, names_joined);
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g_free (names_joined);
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g_free (basename);
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g_array_free (names_not_found, TRUE);
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goto any_error;
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}
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any_error:
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{
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g_object_unref (api);
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return NULL;
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}
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}
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