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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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First attempt (actually third) at a property probing interface
Original commit message from CVS: First attempt (actually third) at a property probing interface
This commit is contained in:
David Schleef
parent
913ced9f7d
commit
06fdc56290
5 changed files with 507 additions and 0 deletions
176
gst-libs/gst/interfaces/propertyprobe.c
Normal file
176
gst-libs/gst/interfaces/propertyprobe.c
Normal file
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@ -0,0 +1,176 @@
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/* 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
|
||||
* 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
|
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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 <gst/propertyprobe/propertyprobe.h>
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static void gst_property_probe_iface_init (GstPropertyProbeInterface *iface);
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enum {
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NEED_PROBE,
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LAST_SIGNAL
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};
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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 = 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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g_type_interface_add_prerequisite (gst_property_probe_type, G_TYPE_OBJECT);
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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[NEED_PROBE] =
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g_signal_new ("need_probe",
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GST_TYPE_PROPERTY_PROBE,
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstPropertyProbeInterface, need_probe),
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NULL,
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NULL,
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gst_marshal_VOID__STRING,
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G_TYPE_NONE, 1,
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G_TYPE_STRING);
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initialized = TRUE;
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}
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/* default virtual functions */
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iface->get_list = NULL;
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iface->probe_property = NULL;
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iface->get_property_info = NULL;
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iface->is_probed = NULL;
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}
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char **
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gst_property_probe_get_list (GstElement *element)
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{
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GstPropertyProbeInterface *iface;
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g_return_val_if_fail (GST_IS_PROPERTY_PROBE (element), NULL);
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iface = GST_PROPERTY_PROBE_GET_IFACE (element);
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if (iface->get_list) {
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return iface->get_list (element);
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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 (GstElement *element,
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const char *property)
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{
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GstPropertyProbeInterface *iface;
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GParamSpec *ps;
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g_return_if_fail (GST_IS_PROPERTY_PROBE (element));
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g_return_if_fail (GST_STATE (element) == GST_STATE_NULL);
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ps = g_object_class_find_property (G_OBJECT_CLASS (element), property);
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if (ps == NULL) return;
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iface = GST_PROPERTY_PROBE_GET_IFACE (element);
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if (iface->probe_property) {
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iface->probe_property (element, ps);
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}
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}
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gchar **
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gst_property_probe_get_property_info (GstElement *element,
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const gchar *property)
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{
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GstPropertyProbeInterface *iface;
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GParamSpec *ps;
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g_return_val_if_fail (GST_IS_PROPERTY_PROBE (element), NULL);
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ps = g_object_class_find_property (G_OBJECT_CLASS (element), property);
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if (ps == NULL) return NULL;
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iface = GST_PROPERTY_PROBE_GET_IFACE (element);
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if (iface->get_property_info) {
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return iface->get_property_info (element, ps);
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}
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return NULL;
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}
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gboolean
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gst_property_probe_is_probed (GstElement *element,
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const char *property)
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{
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GstPropertyProbeInterface *iface;
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GParamSpec *ps;
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g_return_val_if_fail (GST_IS_PROPERTY_PROBE (element), FALSE);
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ps = g_object_class_find_property (G_OBJECT_CLASS (element), property);
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if (ps == NULL) return FALSE;
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iface = GST_PROPERTY_PROBE_GET_IFACE (element);
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if (iface->is_probed) {
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return iface->is_probed (element, ps);
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}
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return FALSE;
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}
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gchar **
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gst_property_probe_get_possibilities (GstElement *element,
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const char *property)
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{
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g_return_val_if_fail (GST_IS_PROPERTY_PROBE (element), NULL);
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if (!gst_property_probe_is_probed (element, property)){
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gst_property_probe_probe_property (element, property);
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}
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return gst_property_probe_get_property_info (element, property);
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}
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73
gst-libs/gst/interfaces/propertyprobe.h
Normal file
73
gst-libs/gst/interfaces/propertyprobe.h
Normal file
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@ -0,0 +1,73 @@
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/* GStreamer PropertyProbe
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* Copyright (C) 2003 David A. Schleef <ds@schleef.org>
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*
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* property_probe.h: property_probe interface design
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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
|
||||
* 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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* 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
|
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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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#ifndef __GST_PROPERTY_PROBE_H__
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#define __GST_PROPERTY_PROBE_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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#define GST_TYPE_PROPERTY_PROBE \
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(gst_property_probe_get_type ())
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#define GST_PROPERTY_PROBE(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PROPERTY_PROBE, GstPropertyProbe))
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#define GST_IS_PROPERTY_PROBE(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PROPERTY_PROBE))
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#define GST_PROPERTY_PROBE_GET_IFACE(obj) \
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(G_TYPE_INSTANCE_GET_INTERFACE ((obj), GST_TYPE_PROPERTY_PROBE, GstPropertyProbeInterface))
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typedef struct _GstPropertyProbe GstPropertyProbe; /* dummy typedef */
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typedef struct _GstPropertyProbeInterface {
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GTypeInterface klass;
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/* signals */
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void (*need_probe) (GstPropertyProbe *property_probe, const gchar *property);
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/* virtual functions */
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gchar ** (*get_list) (GstElement *property_probe);
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void (*probe_property) (GstElement *property_probe, const GParamSpec *property);
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gchar ** (*get_property_info) (GstElement *property_probe,
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const GParamSpec *property);
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gboolean (*is_probed) (GstElement *element, const GParamSpec *property);
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GST_CLASS_PADDING
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} GstPropertyProbeInterface;
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GType gst_property_probe_get_type (void);
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/* virtual class function wrappers */
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gchar ** gst_property_probe_get_list (GstElement *element);
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void gst_property_probe_probe_property (GstElement *element,
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const gchar *property);
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gchar ** gst_property_probe_get_property_info (GstElement *element,
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const gchar *property);
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gboolean gst_property_probe_is_probed (GstElement *element,
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const gchar *property);
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/* utility functions */
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gchar ** gst_property_probe_get_possibilities (GstElement *element,
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const gchar *property);
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G_END_DECLS
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#endif /* __GST_PROPERTY_PROBE_H__ */
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9
gst-libs/gst/propertyprobe/Makefile.am
Normal file
9
gst-libs/gst/propertyprobe/Makefile.am
Normal file
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@ -0,0 +1,9 @@
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noinst_LTLIBRARIES = libgstpropertyprobe.la
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libgstpropertyprobe_la_SOURCES = propertyprobe.c
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libgstpropertyprobeincludedir = $(includedir)/gstreamer-@GST_MAJORMINOR@/gst/propertyprobe
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libgstpropertyprobeinclude_HEADERS = propertyprobe.h
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libgstpropertyprobe_la_CFLAGS = $(GST_CFLAGS)
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176
gst-libs/gst/propertyprobe/propertyprobe.c
Normal file
176
gst-libs/gst/propertyprobe/propertyprobe.c
Normal file
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@ -0,0 +1,176 @@
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/* 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
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Library General Public License for more details.
|
||||
*
|
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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 <gst/propertyprobe/propertyprobe.h>
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static void gst_property_probe_iface_init (GstPropertyProbeInterface *iface);
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enum {
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NEED_PROBE,
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LAST_SIGNAL
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};
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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 = 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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g_type_interface_add_prerequisite (gst_property_probe_type, G_TYPE_OBJECT);
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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[NEED_PROBE] =
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g_signal_new ("need_probe",
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GST_TYPE_PROPERTY_PROBE,
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstPropertyProbeInterface, need_probe),
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NULL,
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NULL,
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gst_marshal_VOID__STRING,
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G_TYPE_NONE, 1,
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G_TYPE_STRING);
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initialized = TRUE;
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}
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/* default virtual functions */
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iface->get_list = NULL;
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iface->probe_property = NULL;
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iface->get_property_info = NULL;
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iface->is_probed = NULL;
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}
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char **
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gst_property_probe_get_list (GstElement *element)
|
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{
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GstPropertyProbeInterface *iface;
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g_return_val_if_fail (GST_IS_PROPERTY_PROBE (element), NULL);
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iface = GST_PROPERTY_PROBE_GET_IFACE (element);
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if (iface->get_list) {
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return iface->get_list (element);
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}
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return NULL;
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}
|
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|
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void
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gst_property_probe_probe_property (GstElement *element,
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const char *property)
|
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{
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GstPropertyProbeInterface *iface;
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GParamSpec *ps;
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|
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g_return_if_fail (GST_IS_PROPERTY_PROBE (element));
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g_return_if_fail (GST_STATE (element) == GST_STATE_NULL);
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|
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ps = g_object_class_find_property (G_OBJECT_CLASS (element), property);
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if (ps == NULL) return;
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|
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iface = GST_PROPERTY_PROBE_GET_IFACE (element);
|
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if (iface->probe_property) {
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iface->probe_property (element, ps);
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}
|
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}
|
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|
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gchar **
|
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gst_property_probe_get_property_info (GstElement *element,
|
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const gchar *property)
|
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{
|
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GstPropertyProbeInterface *iface;
|
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GParamSpec *ps;
|
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|
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g_return_val_if_fail (GST_IS_PROPERTY_PROBE (element), NULL);
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|
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ps = g_object_class_find_property (G_OBJECT_CLASS (element), property);
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if (ps == NULL) return NULL;
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|
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iface = GST_PROPERTY_PROBE_GET_IFACE (element);
|
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if (iface->get_property_info) {
|
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return iface->get_property_info (element, ps);
|
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}
|
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return NULL;
|
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}
|
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|
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gboolean
|
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gst_property_probe_is_probed (GstElement *element,
|
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const char *property)
|
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{
|
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GstPropertyProbeInterface *iface;
|
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GParamSpec *ps;
|
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|
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g_return_val_if_fail (GST_IS_PROPERTY_PROBE (element), FALSE);
|
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|
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ps = g_object_class_find_property (G_OBJECT_CLASS (element), property);
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if (ps == NULL) return FALSE;
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|
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iface = GST_PROPERTY_PROBE_GET_IFACE (element);
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if (iface->is_probed) {
|
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return iface->is_probed (element, ps);
|
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}
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return FALSE;
|
||||
}
|
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|
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gchar **
|
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gst_property_probe_get_possibilities (GstElement *element,
|
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const char *property)
|
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{
|
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g_return_val_if_fail (GST_IS_PROPERTY_PROBE (element), NULL);
|
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|
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if (!gst_property_probe_is_probed (element, property)){
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gst_property_probe_probe_property (element, property);
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}
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return gst_property_probe_get_property_info (element, property);
|
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}
|
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|
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73
gst-libs/gst/propertyprobe/propertyprobe.h
Normal file
73
gst-libs/gst/propertyprobe/propertyprobe.h
Normal file
|
|
@ -0,0 +1,73 @@
|
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/* 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.
|
||||
*/
|
||||
|
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#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_IFACE(obj) \
|
||||
(G_TYPE_INSTANCE_GET_INTERFACE ((obj), GST_TYPE_PROPERTY_PROBE, GstPropertyProbeInterface))
|
||||
|
||||
typedef struct _GstPropertyProbe GstPropertyProbe; /* dummy typedef */
|
||||
|
||||
typedef struct _GstPropertyProbeInterface {
|
||||
GTypeInterface klass;
|
||||
|
||||
/* signals */
|
||||
void (*need_probe) (GstPropertyProbe *property_probe, const gchar *property);
|
||||
|
||||
/* virtual functions */
|
||||
gchar ** (*get_list) (GstElement *property_probe);
|
||||
void (*probe_property) (GstElement *property_probe, const GParamSpec *property);
|
||||
gchar ** (*get_property_info) (GstElement *property_probe,
|
||||
const GParamSpec *property);
|
||||
gboolean (*is_probed) (GstElement *element, const GParamSpec *property);
|
||||
|
||||
GST_CLASS_PADDING
|
||||
} GstPropertyProbeInterface;
|
||||
|
||||
GType gst_property_probe_get_type (void);
|
||||
|
||||
/* virtual class function wrappers */
|
||||
gchar ** gst_property_probe_get_list (GstElement *element);
|
||||
void gst_property_probe_probe_property (GstElement *element,
|
||||
const gchar *property);
|
||||
gchar ** gst_property_probe_get_property_info (GstElement *element,
|
||||
const gchar *property);
|
||||
gboolean gst_property_probe_is_probed (GstElement *element,
|
||||
const gchar *property);
|
||||
|
||||
/* utility functions */
|
||||
gchar ** gst_property_probe_get_possibilities (GstElement *element,
|
||||
const gchar *property);
|
||||
|
||||
G_END_DECLS
|
||||
|
||||
#endif /* __GST_PROPERTY_PROBE_H__ */
|
||||
Loading…
Reference in a new issue