gstreamer/gst-libs/gst/propertyprobe/propertyprobe.c
Ronald S. Bultje 97beb82173 Some prettification fixes to this interface... Make it look good, make it simple and make it more GObject'ific. This ...
Original commit message from CVS:
Some prettification fixes to this interface... Make it look good, make it simple and make it more GObject'ific. This means that it now works largely almost the same as GObject (concerning arguments that you give to the functions, and layout of the virtual functions). I've also got an OSS implementation for this, but it needs one small change before I commit that. Expect that this weekend or so.
2003-11-05 22:59:46 +00:00

258 lines
6.5 KiB
C

/* GStreamer PropertyProbe
* Copyright (C) 2003 David Schleef <ds@schleef.org>
*
* property_probe.c: property_probe design virtual class function wrappers
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "propertyprobe.h"
enum {
SIGNAL_PROBE_NEEDED,
LAST_SIGNAL
};
static void gst_property_probe_iface_init (GstPropertyProbeInterface *iface);
static guint gst_property_probe_signals[LAST_SIGNAL] = { 0 };
GType
gst_property_probe_get_type (void)
{
static GType gst_property_probe_type = 0;
if (!gst_property_probe_type) {
static const GTypeInfo gst_property_probe_info = {
sizeof (GstPropertyProbeInterface),
(GBaseInitFunc) gst_property_probe_iface_init,
NULL,
NULL,
NULL,
NULL,
0,
0,
NULL,
};
gst_property_probe_type =
g_type_register_static (G_TYPE_INTERFACE,
"GstPropertyProbe",
&gst_property_probe_info, 0);
}
return gst_property_probe_type;
}
static void
gst_property_probe_iface_init (GstPropertyProbeInterface *iface)
{
static gboolean initialized = FALSE;
if (!initialized) {
gst_property_probe_signals[SIGNAL_PROBE_NEEDED] =
g_signal_new ("probe_needed", G_TYPE_FROM_CLASS (iface), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstPropertyProbeInterface, probe_needed),
NULL, NULL, g_cclosure_marshal_VOID__POINTER,
G_TYPE_NONE, 1, G_TYPE_POINTER);
initialized = TRUE;
}
/* default virtual functions */
iface->get_properties = NULL;
iface->get_values = NULL;
}
const GList *
gst_property_probe_get_properties (GstPropertyProbe *probe)
{
GstPropertyProbeInterface *iface;
g_return_val_if_fail (probe != NULL, NULL);
iface = GST_PROPERTY_PROBE_GET_IFACE (probe);
if (iface->get_properties)
return iface->get_properties (probe);
return NULL;
}
const GParamSpec *
gst_property_probe_get_property (GstPropertyProbe *probe,
const gchar *name)
{
const GList *pspecs = gst_property_probe_get_properties (probe);
g_return_val_if_fail (probe != NULL, NULL);
g_return_val_if_fail (name != NULL, NULL);
while (pspecs) {
const GParamSpec *pspec = pspecs->data;
if (!strcmp (pspec->name, name))
return pspec;
pspecs = pspecs->next;
}
return NULL;
}
void
gst_property_probe_probe_property (GstPropertyProbe *probe,
const GParamSpec *pspec)
{
GstPropertyProbeInterface *iface;
g_return_if_fail (probe != NULL);
g_return_if_fail (pspec != NULL);
iface = GST_PROPERTY_PROBE_GET_IFACE (probe);
if (iface->probe_property)
iface->probe_property (probe, pspec->param_id, pspec);
}
void
gst_property_probe_probe_property_name (GstPropertyProbe *probe,
const gchar *name)
{
const GParamSpec *pspec;
g_return_if_fail (probe != NULL);
g_return_if_fail (name != NULL);
pspec = g_object_class_find_property (G_OBJECT_CLASS (probe), name);
if (!pspec) {
g_warning ("No such property %s", name);
return;
}
gst_property_probe_probe_property (probe, pspec);
}
gboolean
gst_property_probe_needs_probe (GstPropertyProbe *probe,
const GParamSpec *pspec)
{
GstPropertyProbeInterface *iface;
g_return_val_if_fail (probe != NULL, FALSE);
g_return_val_if_fail (pspec != NULL, FALSE);
iface = GST_PROPERTY_PROBE_GET_IFACE (probe);
if (iface->needs_probe)
return iface->needs_probe (probe, pspec->param_id, pspec);
return FALSE;
}
gboolean
gst_property_probe_needs_probe_name (GstPropertyProbe *probe,
const gchar *name)
{
const GParamSpec *pspec;
g_return_val_if_fail (probe != NULL, FALSE);
g_return_val_if_fail (name != NULL, FALSE);
pspec = g_object_class_find_property (G_OBJECT_CLASS (probe), name);
if (!pspec) {
g_warning ("No such property %s", name);
return FALSE;
}
return gst_property_probe_needs_probe (probe, pspec);
}
GValueArray *
gst_property_probe_get_values (GstPropertyProbe *probe,
const GParamSpec *pspec)
{
GstPropertyProbeInterface *iface;
g_return_val_if_fail (probe != NULL, NULL);
g_return_val_if_fail (pspec != NULL, NULL);
iface = GST_PROPERTY_PROBE_GET_IFACE (probe);
if (iface->get_values)
return iface->get_values (probe, pspec->param_id, pspec);
return NULL;
}
GValueArray *
gst_property_probe_get_values_name (GstPropertyProbe *probe,
const gchar *name)
{
const GParamSpec *pspec;
g_return_val_if_fail (probe != NULL, NULL);
g_return_val_if_fail (name != NULL, NULL);
pspec = g_object_class_find_property (G_OBJECT_CLASS (probe), name);
if (!pspec) {
g_warning ("No such property %s", name);
return NULL;
}
return gst_property_probe_get_values (probe, pspec);
}
GValueArray *
gst_property_probe_probe_and_get_values (GstPropertyProbe *probe,
const GParamSpec *pspec)
{
GstPropertyProbeInterface *iface;
g_return_val_if_fail (probe != NULL, NULL);
g_return_val_if_fail (pspec != NULL, NULL);
iface = GST_PROPERTY_PROBE_GET_IFACE (probe);
if (gst_property_probe_needs_probe (probe, pspec))
gst_property_probe_probe_property (probe, pspec);
return gst_property_probe_get_values (probe, pspec);
}
GValueArray *
gst_property_probe_probe_and_get_values_name (GstPropertyProbe *probe,
const gchar *name)
{
const GParamSpec *pspec;
g_return_val_if_fail (probe != NULL, NULL);
g_return_val_if_fail (name != NULL, NULL);
pspec = g_object_class_find_property (G_OBJECT_CLASS (probe), name);
if (!pspec) {
g_warning ("No such property %s", name);
return NULL;
}
return gst_property_probe_probe_and_get_values (probe, pspec);
}