gstreamer/gst-libs/gst/interfaces/propertyprobe.h
2011-11-11 19:16:54 +01:00

112 lines
4.6 KiB
C

/* GStreamer PropertyProbe
* Copyright (C) 2003 David A. Schleef <ds@schleef.org>
*
* property_probe.h: property_probe interface design
*
* 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.
*/
#ifndef __GST_PROPERTY_PROBE_H__
#define __GST_PROPERTY_PROBE_H__
#include <gst/gst.h>
G_BEGIN_DECLS
#define GST_TYPE_PROPERTY_PROBE \
(gst_property_probe_get_type ())
#define GST_PROPERTY_PROBE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PROPERTY_PROBE, GstPropertyProbe))
#define GST_IS_PROPERTY_PROBE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PROPERTY_PROBE))
#define GST_PROPERTY_PROBE_GET_INTERFACE(obj) \
(G_TYPE_INSTANCE_GET_INTERFACE ((obj), GST_TYPE_PROPERTY_PROBE, GstPropertyProbeInterface))
/**
* GstPropertyProbe:
*
* Opaque #GstPropertyProbe data structure.
*/
typedef struct _GstPropertyProbe GstPropertyProbe; /* dummy typedef */
typedef struct _GstPropertyProbeInterface GstPropertyProbeInterface;
/**
* GstPropertyProbeInterface:
* @iface: parent interface type.
* @probe_needed: default signal handler
* @get_properties: virtual method to get list of probable properties
* @needs_probe: virtual method to tell if probe need update
* @probe_property: virtual method to probe a property
* @get_values: virtual method to get probe results for a property
*
* #GstPropertyProbe interface.
*/
struct _GstPropertyProbeInterface {
GTypeInterface iface;
/* signals */
void (*probe_needed) (GstPropertyProbe *probe,
const GParamSpec *pspec);
/* virtual functions */
const GList * (*get_properties) (GstPropertyProbe *probe);
gboolean (*needs_probe) (GstPropertyProbe *probe,
guint prop_id,
const GParamSpec *pspec);
void (*probe_property) (GstPropertyProbe *probe,
guint prop_id,
const GParamSpec *pspec);
GValueArray * (*get_values) (GstPropertyProbe *probe,
guint prop_id,
const GParamSpec *pspec);
};
GType gst_property_probe_get_type (void);
/* virtual class function wrappers */
/* returns list of GParamSpecs */
const GList * gst_property_probe_get_properties (GstPropertyProbe *probe);
const GParamSpec *gst_property_probe_get_property (GstPropertyProbe *probe,
const gchar *name);
/* probe one property */
void gst_property_probe_probe_property (GstPropertyProbe *probe,
const GParamSpec *pspec);
void gst_property_probe_probe_property_name (GstPropertyProbe *probe,
const gchar *name);
/* do we need a probe? */
gboolean gst_property_probe_needs_probe (GstPropertyProbe *probe,
const GParamSpec *pspec);
gboolean gst_property_probe_needs_probe_name (GstPropertyProbe *probe,
const gchar *name);
/* returns list of GValues */
GValueArray * gst_property_probe_get_values (GstPropertyProbe *probe,
const GParamSpec *pspec);
GValueArray * gst_property_probe_get_values_name (GstPropertyProbe *probe,
const gchar *name);
/* sugar */
GValueArray * gst_property_probe_probe_and_get_values (GstPropertyProbe *probe,
const GParamSpec *pspec);
GValueArray * gst_property_probe_probe_and_get_values_name (GstPropertyProbe *probe,
const gchar *name);
G_END_DECLS
#endif /* __GST_PROPERTY_PROBE_H__ */