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