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