mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-05-31 22:58:17 +00:00
59c09eb029
This can be used later by base class APIs to know whether they're called from a subclass instance init function (where the object isn't properly constructed yet and one should only really poke at the instance structure but not much else) or after object construction has been finished. Fix up GstBin unit test for CONSTRUCTED flag addition. See https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/2794 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6150>
381 lines
12 KiB
C
381 lines
12 KiB
C
/* GStreamer
|
|
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2000 Wim Taymans <wtay@chello.be>
|
|
* 2005 Wim Taymans <wim@fluendo.com>
|
|
*
|
|
* 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., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifndef __GST_OBJECT_H__
|
|
#define __GST_OBJECT_H__
|
|
|
|
#include <gst/gstconfig.h>
|
|
|
|
#include <glib-object.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
#define GST_TYPE_OBJECT (gst_object_get_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))
|
|
#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))
|
|
#define GST_OBJECT_CAST(obj) ((GstObject*)(obj))
|
|
#define GST_OBJECT_CLASS_CAST(klass) ((GstObjectClass*)(klass))
|
|
|
|
/**
|
|
* GST_OBJECT_FLAG_CONSTRUCTED:
|
|
*
|
|
* Flag that's set when the object has been constructed. This can be used by
|
|
* API such as base class setters to differentiate between the case where
|
|
* they're called from a subclass's instance init function (and where the
|
|
* object isn't fully constructed yet, and so one shouldn't do anything but
|
|
* set values in the instance structure), and the case where the object is
|
|
* constructed.
|
|
*
|
|
* Since: 1.24
|
|
*/
|
|
|
|
/**
|
|
* GstObjectFlags:
|
|
* @GST_OBJECT_FLAG_MAY_BE_LEAKED: the object is expected to stay alive even
|
|
* after gst_deinit() has been called and so should be ignored by leak
|
|
* detection tools. (Since: 1.10)
|
|
* @GST_OBJECT_FLAG_CONSTRUCTED: flag that's set when the object has been
|
|
* constructed. This can be used by API such as base class setters to
|
|
* differentiate between the case where they're called from a subclass's
|
|
* instance init function (and where the object isn't fully constructed yet,
|
|
* and so one shouldn't do anything but set values in the instance structure),
|
|
* and the case where the object is constructed. (Since: 1.24)
|
|
* @GST_OBJECT_FLAG_LAST: subclasses can add additional flags starting from this flag
|
|
*
|
|
* The standard flags that an gstobject may have.
|
|
*/
|
|
typedef enum
|
|
{
|
|
GST_OBJECT_FLAG_MAY_BE_LEAKED = (1 << 0),
|
|
GST_OBJECT_FLAG_CONSTRUCTED = (1 << 1),
|
|
/* padding */
|
|
GST_OBJECT_FLAG_LAST = (1<<4)
|
|
} GstObjectFlags;
|
|
|
|
/**
|
|
* GST_OBJECT_REFCOUNT:
|
|
* @obj: a #GstObject
|
|
*
|
|
* Get access to the reference count field of the object.
|
|
*/
|
|
#define GST_OBJECT_REFCOUNT(obj) (((GObject*)(obj))->ref_count)
|
|
/**
|
|
* GST_OBJECT_REFCOUNT_VALUE:
|
|
* @obj: a #GstObject
|
|
*
|
|
* Get the reference count value of the object.
|
|
*/
|
|
#define GST_OBJECT_REFCOUNT_VALUE(obj) g_atomic_int_get ((gint *) &GST_OBJECT_REFCOUNT(obj))
|
|
|
|
/* we do a GST_OBJECT_CAST to avoid type checking, better call these
|
|
* function with a valid object! */
|
|
|
|
/**
|
|
* GST_OBJECT_GET_LOCK:
|
|
* @obj: a #GstObject
|
|
*
|
|
* Acquire a reference to the mutex of this object.
|
|
*/
|
|
#define GST_OBJECT_GET_LOCK(obj) (&GST_OBJECT_CAST(obj)->lock)
|
|
/**
|
|
* GST_OBJECT_LOCK:
|
|
* @obj: a #GstObject to lock
|
|
*
|
|
* This macro will obtain a lock on the object, making serialization possible.
|
|
* It blocks until the lock can be obtained.
|
|
*/
|
|
#define GST_OBJECT_LOCK(obj) g_mutex_lock(GST_OBJECT_GET_LOCK(obj))
|
|
|
|
/**
|
|
* GST_OBJECT_AUTO_LOCK:
|
|
* @obj: a #GstObject to lock
|
|
* @var: a variable name to be declared
|
|
*
|
|
* Declare a #GMutexLocker variable with g_autoptr() and lock the object. The
|
|
* mutex will be unlocked automatically when leaving the scope.
|
|
*
|
|
* ``` c
|
|
* {
|
|
* GST_OBJECT_AUTO_LOCK (obj, locker);
|
|
*
|
|
* obj->stuff_with_lock();
|
|
* if (cond) {
|
|
* // No need to unlock
|
|
* return;
|
|
* }
|
|
*
|
|
* // Unlock before end of scope
|
|
* g_clear_pointer (&locker, g_mutex_locker_free);
|
|
* obj->stuff_without_lock();
|
|
* }
|
|
* ```
|
|
* Since: 1.24.0
|
|
*/
|
|
#define GST_OBJECT_AUTO_LOCK(obj, var) g_autoptr(GMutexLocker) G_GNUC_UNUSED var = g_mutex_locker_new(GST_OBJECT_GET_LOCK(obj))
|
|
|
|
/**
|
|
* GST_OBJECT_TRYLOCK:
|
|
* @obj: a #GstObject.
|
|
*
|
|
* This macro will try to obtain a lock on the object, but will return with
|
|
* %FALSE if it can't get it immediately.
|
|
*/
|
|
#define GST_OBJECT_TRYLOCK(obj) g_mutex_trylock(GST_OBJECT_GET_LOCK(obj))
|
|
/**
|
|
* GST_OBJECT_UNLOCK:
|
|
* @obj: a #GstObject to unlock.
|
|
*
|
|
* This macro releases a lock on the object.
|
|
*/
|
|
#define GST_OBJECT_UNLOCK(obj) g_mutex_unlock(GST_OBJECT_GET_LOCK(obj))
|
|
|
|
|
|
/**
|
|
* GST_OBJECT_NAME:
|
|
* @obj: a #GstObject
|
|
*
|
|
* Get the name of this object. This is not thread-safe by default
|
|
* (i.e. you will have to make sure the object lock is taken yourself).
|
|
* If in doubt use gst_object_get_name() instead.
|
|
*/
|
|
#define GST_OBJECT_NAME(obj) (GST_OBJECT_CAST(obj)->name)
|
|
/**
|
|
* GST_OBJECT_PARENT:
|
|
* @obj: a #GstObject
|
|
*
|
|
* Get the parent of this object. This is not thread-safe by default
|
|
* (i.e. you will have to make sure the object lock is taken yourself).
|
|
* If in doubt use gst_object_get_parent() instead.
|
|
*/
|
|
#define GST_OBJECT_PARENT(obj) (GST_OBJECT_CAST(obj)->parent)
|
|
|
|
|
|
/**
|
|
* GST_OBJECT_FLAGS:
|
|
* @obj: a #GstObject
|
|
*
|
|
* This macro returns the entire set of flags for the object.
|
|
*/
|
|
#define GST_OBJECT_FLAGS(obj) (GST_OBJECT_CAST (obj)->flags)
|
|
/**
|
|
* GST_OBJECT_FLAG_IS_SET:
|
|
* @obj: a #GstObject
|
|
* @flag: Flag to check for
|
|
*
|
|
* This macro checks to see if the given flag is set.
|
|
*/
|
|
#define GST_OBJECT_FLAG_IS_SET(obj,flag) ((GST_OBJECT_FLAGS (obj) & (flag)) == (flag))
|
|
/**
|
|
* GST_OBJECT_FLAG_SET:
|
|
* @obj: a #GstObject
|
|
* @flag: Flag to set
|
|
*
|
|
* This macro sets the given bits.
|
|
*/
|
|
#define GST_OBJECT_FLAG_SET(obj,flag) (GST_OBJECT_FLAGS (obj) |= (flag))
|
|
/**
|
|
* GST_OBJECT_FLAG_UNSET:
|
|
* @obj: a #GstObject
|
|
* @flag: Flag to set
|
|
*
|
|
* This macro unsets the given bits.
|
|
*/
|
|
#define GST_OBJECT_FLAG_UNSET(obj,flag) (GST_OBJECT_FLAGS (obj) &= ~(flag))
|
|
|
|
typedef struct _GstObject GstObject;
|
|
typedef struct _GstObjectClass GstObjectClass;
|
|
|
|
/**
|
|
* GstObject:
|
|
* @lock: object LOCK
|
|
* @name: The name of the object
|
|
* @parent: this object's parent, weak ref
|
|
* @flags: flags for this object
|
|
*
|
|
* GStreamer base object class.
|
|
*/
|
|
struct _GstObject {
|
|
GInitiallyUnowned object;
|
|
|
|
/*< public >*/ /* with LOCK */
|
|
GMutex lock; /* object LOCK */
|
|
gchar *name; /* object name */
|
|
GstObject *parent; /* this object's parent, weak ref */
|
|
guint32 flags;
|
|
|
|
/*< private >*/
|
|
GList *control_bindings; /* List of GstControlBinding */
|
|
guint64 control_rate;
|
|
guint64 last_sync;
|
|
|
|
gpointer _gst_reserved;
|
|
};
|
|
|
|
/**
|
|
* GstObjectClass:
|
|
* @parent_class: parent
|
|
* @path_string_separator: separator used by gst_object_get_path_string()
|
|
* @deep_notify: default signal handler
|
|
*
|
|
* GStreamer base object class.
|
|
*/
|
|
struct _GstObjectClass {
|
|
GInitiallyUnownedClass parent_class;
|
|
|
|
const gchar *path_string_separator;
|
|
|
|
/* signals */
|
|
void (*deep_notify) (GstObject * object, GstObject * orig, GParamSpec * pspec);
|
|
|
|
/*< public >*/
|
|
/* virtual methods for subclasses */
|
|
|
|
/*< private >*/
|
|
gpointer _gst_reserved[GST_PADDING];
|
|
};
|
|
|
|
/* normal GObject stuff */
|
|
|
|
GST_API
|
|
GType gst_object_get_type (void);
|
|
|
|
/* name routines */
|
|
|
|
GST_API
|
|
gboolean gst_object_set_name (GstObject *object, const gchar *name);
|
|
|
|
GST_API
|
|
gchar* gst_object_get_name (GstObject *object);
|
|
|
|
/* parentage routines */
|
|
|
|
GST_API
|
|
gboolean gst_object_set_parent (GstObject *object, GstObject *parent);
|
|
|
|
GST_API
|
|
GstObject* gst_object_get_parent (GstObject *object);
|
|
|
|
GST_API
|
|
void gst_object_unparent (GstObject *object);
|
|
|
|
GST_API
|
|
gboolean gst_object_has_as_parent (GstObject *object, GstObject *parent);
|
|
|
|
GST_API
|
|
gboolean gst_object_has_as_ancestor (GstObject *object, GstObject *ancestor);
|
|
|
|
GST_DEPRECATED_FOR(gst_object_has_as_ancestor)
|
|
gboolean gst_object_has_ancestor (GstObject *object, GstObject *ancestor);
|
|
|
|
GST_API
|
|
void gst_object_default_deep_notify (GObject *object, GstObject *orig,
|
|
GParamSpec *pspec, gchar **excluded_props);
|
|
|
|
/* refcounting + life cycle */
|
|
|
|
GST_API
|
|
gpointer gst_object_ref (gpointer object);
|
|
|
|
GST_API
|
|
void gst_object_unref (gpointer object);
|
|
|
|
GST_API
|
|
void gst_clear_object (GstObject **object_ptr);
|
|
#define gst_clear_object(object_ptr) g_clear_pointer ((object_ptr), gst_object_unref)
|
|
|
|
GST_API
|
|
gpointer gst_object_ref_sink (gpointer object);
|
|
|
|
/* replace object pointer */
|
|
|
|
GST_API
|
|
gboolean gst_object_replace (GstObject **oldobj, GstObject *newobj);
|
|
|
|
/* printing out the 'path' of the object */
|
|
|
|
GST_API
|
|
gchar * gst_object_get_path_string (GstObject *object);
|
|
|
|
/* misc utils */
|
|
|
|
GST_API
|
|
gboolean gst_object_check_uniqueness (GList *list, const gchar *name);
|
|
|
|
/* controller functions */
|
|
#include <gst/gstcontrolbinding.h>
|
|
#include <gst/gstcontrolsource.h>
|
|
|
|
GST_API
|
|
GstClockTime gst_object_suggest_next_sync (GstObject * object);
|
|
|
|
GST_API
|
|
gboolean gst_object_sync_values (GstObject * object, GstClockTime timestamp);
|
|
|
|
GST_API
|
|
gboolean gst_object_has_active_control_bindings (GstObject *object);
|
|
|
|
GST_API
|
|
void gst_object_set_control_bindings_disabled (GstObject *object, gboolean disabled);
|
|
|
|
GST_API
|
|
void gst_object_set_control_binding_disabled (GstObject *object,
|
|
const gchar * property_name,
|
|
gboolean disabled);
|
|
|
|
GST_API
|
|
gboolean gst_object_add_control_binding (GstObject * object, GstControlBinding * binding);
|
|
|
|
GST_API
|
|
GstControlBinding *
|
|
gst_object_get_control_binding (GstObject *object, const gchar * property_name);
|
|
|
|
GST_API
|
|
gboolean gst_object_remove_control_binding (GstObject * object, GstControlBinding * binding);
|
|
|
|
GST_API
|
|
GValue * gst_object_get_value (GstObject * object, const gchar * property_name,
|
|
GstClockTime timestamp);
|
|
GST_API
|
|
gboolean gst_object_get_value_array (GstObject * object, const gchar * property_name,
|
|
GstClockTime timestamp, GstClockTime interval,
|
|
guint n_values, gpointer values);
|
|
GST_API
|
|
gboolean gst_object_get_g_value_array (GstObject * object, const gchar * property_name,
|
|
GstClockTime timestamp, GstClockTime interval,
|
|
guint n_values, GValue *values);
|
|
GST_API
|
|
GstClockTime gst_object_get_control_rate (GstObject * object);
|
|
|
|
GST_API
|
|
void gst_object_set_control_rate (GstObject * object, GstClockTime control_rate);
|
|
|
|
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstObject, gst_object_unref)
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GST_OBJECT_H__ */
|
|
|