mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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1a5cfae0f6
Original commit message from CVS: Added a first attempt for XML embedding in the main core XML. Objects will emit a signal that a user app can connect to in order to insert its XML into the tree. You can catch the object_loaded signal in GstXML to parse the user supplied XML data in the stream. The object_loaded signal is implemented with a custom made class signal. All GstObject classes now automatically create a GstSignalObject that serves as a proxy to the user app when an object is loaded. All objects are currently responsible to emit the class signal themselves. runxml and createxml serve as an example how the XML hooks can be used to insert and retrieve custom XML tags.
154 lines
4.4 KiB
C
154 lines
4.4 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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*
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* gstobject.h: Header for base GstObject
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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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#ifndef __GST_OBJECT_H__
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#define __GST_OBJECT_H__
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#include <gtk/gtk.h>
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#include <gst/gsttrace.h>
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#include <parser.h>
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef HAVE_ATOMIC_H
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#include <asm/atomic.h>
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#endif
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// FIXME
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#include "gstlog.h"
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#define GST_TYPE_OBJECT \
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(gst_object_get_type())
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#define GST_OBJECT(obj) \
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(GTK_CHECK_CAST((obj),GST_TYPE_OBJECT,GstObject))
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#define GST_OBJECT_CLASS(klass) \
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(GTK_CHECK_CLASS_CAST((klass),GST_TYPE_OBJECT,GstObjectClass))
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#define GST_IS_OBJECT(obj) \
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(GTK_CHECK_TYPE((obj),GST_TYPE_OBJECT))
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#define GST_IS_OBJECT_CLASS(obj) \
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(GTK_CHECK_CLASS_TYPE((klass),GST_TYPE_OBJECT))
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typedef struct _GstObject GstObject;
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typedef struct _GstObjectClass GstObjectClass;
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#define GST_OBJECT_FLAG_LAST 4
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struct _GstObject {
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GtkObject object;
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gchar *name;
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/* have to have a refcount for the object */
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#ifdef HAVE_ATOMIC_H
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atomic_t refcount;
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#else
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int refcount;
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#endif
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/* locking for all sorts of things (like the refcount) */
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GMutex *lock;
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/* this objects parent */
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GstObject *parent;
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};
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struct _GstObjectClass {
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GtkObjectClass parent_class;
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gchar *path_string_separator;
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GtkObject *signal_object;
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/* signals */
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void (*parent_set) (GstObject *object, GstObject *parent);
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void (*object_saved) (GstObject *object, xmlNodePtr parent);
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/* functions go here */
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xmlNodePtr (*save_thyself) (GstObject *object, xmlNodePtr parent);
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void (*restore_thyself) (GstObject *object, xmlNodePtr self);
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};
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#define GST_OBJECT_NAME(obj) (const gchar*)(((GstObject *)(obj))->name)
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#define GST_OBJECT_PARENT(obj) (((GstObject *)(obj))->parent)
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#define GST_FLAGS(obj) GTK_OBJECT_FLAGS(obj)
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#define GST_FLAG_IS_SET(obj,flag) (GST_FLAGS (obj) & (1<<(flag)))
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#define GST_FLAG_SET(obj,flag) G_STMT_START{ (GST_FLAGS (obj) |= (1<<(flag))); }G_STMT_END
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#define GST_FLAG_UNSET(obj,flag) G_STMT_START{ (GST_FLAGS (obj) &= ~(1<<(flag))); }G_STMT_END
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/* object locking */
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#define GST_LOCK(obj) (g_mutex_lock(GST_OBJECT(obj)->lock))
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#define GST_TRYLOCK(obj) (g_mutex_trylock(GST_OBJECT(obj)->lock))
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#define GST_UNLOCK(obj) (g_mutex_unlock(GST_OBJECT(obj)->lock))
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#define GST_GET_LOCK(obj) (GST_OBJECT(obj)->lock)
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/* normal GtkObject stuff */
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GtkType gst_object_get_type (void);
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GstObject* gst_object_new (void);
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/* name routines */
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void gst_object_set_name (GstObject *object, const gchar *name);
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const gchar* gst_object_get_name (GstObject *object);
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/* parentage routines */
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void gst_object_set_parent (GstObject *object,GstObject *parent);
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GstObject* gst_object_get_parent (GstObject *object);
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void gst_object_unparent (GstObject *object);
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xmlNodePtr gst_object_save_thyself (GstObject *object, xmlNodePtr parent);
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/* refcounting */
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#define gst_object_ref(object) gtk_object_ref(GTK_OBJECT(object));
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#define gst_object_unref(object) gtk_object_unref(GTK_OBJECT(object));
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#define gst_object_sink(object) gtk_object_sink(GTK_OBJECT(object));
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/* destroying an object */
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#define gst_object_destroy(object) gtk_object_destroy(GTK_OBJECT(object))
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/* printing out the 'path' of the object */
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gchar * gst_object_get_path_string (GstObject *object);
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guint gst_class_signal_connect (GstObjectClass *klass,
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const gchar *name,
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GtkSignalFunc func,
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gpointer func_data);
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void gst_class_signal_emit_by_name (GstObject *object,
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const gchar *name,
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xmlNodePtr self);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __GST_OBJECT_H__ */
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