gstreamer/gst/gstobject.h

173 lines
5.6 KiB
C
Raw Normal View History

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstobject.h: Header for base GstObject
*
* 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_OBJECT_H__
#define __GST_OBJECT_H__
#include <gst/gstconfig.h>
#include <glib-object.h> /* note that this gets wrapped in __GST_OBJECT_H__ */
#include <gst/gstmarshal.h>
#include <gst/gsttrace.h>
#include <gst/gsttypes.h>
G_BEGIN_DECLS
extern GType _gst_object_type;
#define GST_TYPE_OBJECT (_gst_object_type)
#define GST_IS_OBJECT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_OBJECT))
#define GST_IS_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_OBJECT))
#define GST_OBJECT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_OBJECT, GstObjectClass))
This is an attempt at not segfaulting on errors but reporting some usefull info instead. Original commit message from CVS: This is an attempt at not segfaulting on errors but reporting some usefull info instead. - bin changes so errors can propagate. - changed the _FAST macros to _CAST because that is what they do. - removed all references to cothreads out of the core, they are really a scheduler issue, handler with a sched_private gpointer. - added a live buffer count, for debugging buffer leaks. - added error checking in gst_scheduler_state_transition this solves the "out of cothreads" problem. - GST_ELEMENT_NO_ENTRY == GST_ELEMENT_INFINITE_LOOP - added 2 private element flasg for use by the scheduler (_COTHREAD_STOPPING) is now - added scheduler entry points: - _yield : to create possible scheduling points. - _interrupt: to stop execution of an element. - _error: to signal en error condition to the scheduler. - improved error messages for pads. - signal gst_element_error where appropriate. - added the a new bin to the parent before entering it so one can reference its children. - queue memleak fixes on dispose. - added possible deadlock detection in queue (turned off be default) - GstBasicScheduler is a real class of its own now, hiding its internal variables. - GST_ELEMENT_IS_COTHREAD_STOPPING is gone. either call explicit _yield operations, or make a sane loop. - Better state change handling in filesrc. Better error reporting/recovery too. - updated core plugins. - detect non decoupled elements on scheduler boundries and error.
2001-12-22 21:18:17 +00:00
#define GST_OBJECT_CAST(obj) ((GstObject*)(obj))
#define GST_OBJECT_CLASS_CAST(klass) ((GstObjectClass*)(klass))
#ifdef GST_TYPE_PARANOID
# define GST_OBJECT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_OBJECT, GstObject))
# define GST_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_OBJECT, GstObjectClass))
#else
This is an attempt at not segfaulting on errors but reporting some usefull info instead. Original commit message from CVS: This is an attempt at not segfaulting on errors but reporting some usefull info instead. - bin changes so errors can propagate. - changed the _FAST macros to _CAST because that is what they do. - removed all references to cothreads out of the core, they are really a scheduler issue, handler with a sched_private gpointer. - added a live buffer count, for debugging buffer leaks. - added error checking in gst_scheduler_state_transition this solves the "out of cothreads" problem. - GST_ELEMENT_NO_ENTRY == GST_ELEMENT_INFINITE_LOOP - added 2 private element flasg for use by the scheduler (_COTHREAD_STOPPING) is now - added scheduler entry points: - _yield : to create possible scheduling points. - _interrupt: to stop execution of an element. - _error: to signal en error condition to the scheduler. - improved error messages for pads. - signal gst_element_error where appropriate. - added the a new bin to the parent before entering it so one can reference its children. - queue memleak fixes on dispose. - added possible deadlock detection in queue (turned off be default) - GstBasicScheduler is a real class of its own now, hiding its internal variables. - GST_ELEMENT_IS_COTHREAD_STOPPING is gone. either call explicit _yield operations, or make a sane loop. - Better state change handling in filesrc. Better error reporting/recovery too. - updated core plugins. - detect non decoupled elements on scheduler boundries and error.
2001-12-22 21:18:17 +00:00
# define GST_OBJECT GST_OBJECT_CAST
# define GST_OBJECT_CLASS GST_OBJECT_CLASS_CAST
#endif
typedef enum
{
GST_DESTROYED = 0,
GST_FLOATING,
GST_OBJECT_FLAG_LAST = 4
} GstObjectFlags;
struct _GstObject {
GObject object;
gchar *name;
/* locking for all sorts of things */
GMutex *lock;
/* this object's parent */
GstObject *parent;
guint32 flags;
};
/* signal_object is used to signal to the whole class */
struct _GstObjectClass {
GObjectClass parent_class;
gchar *path_string_separator;
GObject *signal_object;
/* signals */
void (*parent_set) (GstObject *object, GstObject *parent);
void (*parent_unset) (GstObject *object, GstObject *parent);
#ifndef GST_DISABLE_LOADSAVE_REGISTRY
void (*object_saved) (GstObject *object, xmlNodePtr parent);
#endif
void (*deep_notify) (GstObject *object, GstObject *orig, GParamSpec *pspec);
/* functions go here */
void (*destroy) (GstObject *object);
#ifndef GST_DISABLE_LOADSAVE_REGISTRY
xmlNodePtr (*save_thyself) (GstObject *object, xmlNodePtr parent);
void (*restore_thyself) (GstObject *object, xmlNodePtr self);
#endif
gpointer dummy[4];
};
This is an attempt at not segfaulting on errors but reporting some usefull info instead. Original commit message from CVS: This is an attempt at not segfaulting on errors but reporting some usefull info instead. - bin changes so errors can propagate. - changed the _FAST macros to _CAST because that is what they do. - removed all references to cothreads out of the core, they are really a scheduler issue, handler with a sched_private gpointer. - added a live buffer count, for debugging buffer leaks. - added error checking in gst_scheduler_state_transition this solves the "out of cothreads" problem. - GST_ELEMENT_NO_ENTRY == GST_ELEMENT_INFINITE_LOOP - added 2 private element flasg for use by the scheduler (_COTHREAD_STOPPING) is now - added scheduler entry points: - _yield : to create possible scheduling points. - _interrupt: to stop execution of an element. - _error: to signal en error condition to the scheduler. - improved error messages for pads. - signal gst_element_error where appropriate. - added the a new bin to the parent before entering it so one can reference its children. - queue memleak fixes on dispose. - added possible deadlock detection in queue (turned off be default) - GstBasicScheduler is a real class of its own now, hiding its internal variables. - GST_ELEMENT_IS_COTHREAD_STOPPING is gone. either call explicit _yield operations, or make a sane loop. - Better state change handling in filesrc. Better error reporting/recovery too. - updated core plugins. - detect non decoupled elements on scheduler boundries and error.
2001-12-22 21:18:17 +00:00
#define GST_FLAGS(obj) (GST_OBJECT_CAST (obj)->flags)
#define GST_FLAG_IS_SET(obj,flag) (GST_FLAGS (obj) & (1<<(flag)))
#define GST_FLAG_SET(obj,flag) G_STMT_START{ (GST_FLAGS (obj) |= (1<<(flag))); }G_STMT_END
#define GST_FLAG_UNSET(obj,flag) G_STMT_START{ (GST_FLAGS (obj) &= ~(1<<(flag))); }G_STMT_END
#define GST_OBJECT_NAME(obj) (const gchar*)(((GstObject *)(obj))->name)
#define GST_OBJECT_PARENT(obj) (((GstObject *)(obj))->parent)
#define GST_OBJECT_DESTROYED(obj) (GST_FLAG_IS_SET (obj, GST_DESTROYED))
#define GST_OBJECT_FLOATING(obj) (GST_FLAG_IS_SET (obj, GST_FLOATING))
/* CR1: object locking - GObject 2.0 doesn't have threadsafe locking */
#define GST_LOCK(obj) (g_mutex_lock(GST_OBJECT_CAST(obj)->lock))
#define GST_TRYLOCK(obj) (g_mutex_trylock(GST_OBJECT_CAST(obj)->lock))
#define GST_UNLOCK(obj) (g_mutex_unlock(GST_OBJECT_CAST(obj)->lock))
#define GST_GET_LOCK(obj) (GST_OBJECT_CAST(obj)->lock)
/* normal GObject stuff */
GType gst_object_get_type (void);
/* name routines */
void gst_object_set_name (GstObject *object, const gchar *name);
const gchar* gst_object_get_name (GstObject *object);
/* parentage routines */
void gst_object_set_parent (GstObject *object, GstObject *parent);
GstObject* gst_object_get_parent (GstObject *object);
void gst_object_unparent (GstObject *object);
void gst_object_default_deep_notify (GObject *object, GstObject *orig,
GParamSpec *pspec, gchar **excluded_props);
gboolean gst_object_check_uniqueness (GList *list, const gchar *name);
#ifndef GST_DISABLE_LOADSAVE_REGISTRY
xmlNodePtr gst_object_save_thyself (GstObject *object, xmlNodePtr parent);
void gst_object_restore_thyself (GstObject *object, xmlNodePtr self);
#else
#pragma GCC poison gst_object_save_thyself
#pragma GCC poison gst_object_restore_thyself
#endif
/* refcounting */
GstObject * gst_object_ref (GstObject *object);
void gst_object_unref (GstObject *object);
void gst_object_sink (GstObject *object);
/* destroying an object */
void gst_object_destroy (GstObject *object);
/* printing out the 'path' of the object */
gchar * gst_object_get_path_string (GstObject *object);
guint gst_class_signal_connect (GstObjectClass *klass,
const gchar *name,
gpointer func,
gpointer func_data);
#ifndef GST_DISABLE_LOADSAVE_REGISTRY
void gst_class_signal_emit_by_name (GstObject *object,
const gchar *name,
xmlNodePtr self);
#else
#pragma GCC poison gst_class_signal_emit_by_name
#endif
G_END_DECLS
#endif /* __GST_OBJECT_H__ */