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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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5f4a965f67
Pipeline serialisation to and from XML is horribly broken for all but the most simple use cases, and will likely never be fixed. Make sure everyone playing around with these tools is aware of this, to avoid frustration. See countless bug reports in bugzilla. Fixes bug #622685.
355 lines
11 KiB
C
355 lines
11 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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* 2005 Wim Taymans <wim@fluendo.com>
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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 <gst/gstconfig.h>
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#include <glib-object.h>
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G_BEGIN_DECLS
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#define GST_TYPE_OBJECT (gst_object_get_type ())
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#define GST_IS_OBJECT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_OBJECT))
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#define GST_IS_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_OBJECT))
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#define GST_OBJECT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_OBJECT, GstObjectClass))
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#define GST_OBJECT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_OBJECT, GstObject))
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#define GST_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_OBJECT, GstObjectClass))
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#define GST_OBJECT_CAST(obj) ((GstObject*)(obj))
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#define GST_OBJECT_CLASS_CAST(klass) ((GstObjectClass*)(klass))
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/* make sure we don't change the object size but still make it compile
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* without libxml */
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#if defined(GST_DISABLE_LOADSAVE) || defined(GST_DISABLE_DEPRECATED)
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#define GstXmlNodePtr gpointer
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#else
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#define GstXmlNodePtr xmlNodePtr
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#endif
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/**
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* GstObjectFlags:
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* @GST_OBJECT_DISPOSING: the object is been destroyed, don't use it anymore
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* @GST_OBJECT_FLOATING: the object has a floating reference count (e.g. its
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* not assigned to a bin)
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* @GST_OBJECT_FLAG_LAST: subclasses can add additional flags starting from this flag
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*
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* The standard flags that an gstobject may have.
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*/
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typedef enum
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{
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GST_OBJECT_DISPOSING = (1<<0),
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GST_OBJECT_FLOATING = (1<<1),
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/* padding */
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GST_OBJECT_FLAG_LAST = (1<<4)
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} GstObjectFlags;
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/**
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* GST_OBJECT_REFCOUNT:
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* @obj: a #GstObject
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*
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* Get access to the reference count field of the object.
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*/
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#define GST_OBJECT_REFCOUNT(obj) (((GObject*)(obj))->ref_count)
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/**
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* GST_OBJECT_REFCOUNT_VALUE:
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* @obj: a #GstObject
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*
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* Get the reference count value of the object.
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*/
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#define GST_OBJECT_REFCOUNT_VALUE(obj) g_atomic_int_get ((gint *) &GST_OBJECT_REFCOUNT(obj))
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/* we do a GST_OBJECT_CAST to avoid type checking, better call these
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* function with a valid object! */
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/**
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* GST_OBJECT_GET_LOCK:
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* @obj: a #GstObject
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*
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* Acquire a reference to the mutex of this object.
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*/
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#define GST_OBJECT_GET_LOCK(obj) (GST_OBJECT_CAST(obj)->lock)
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/**
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* GST_OBJECT_LOCK:
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* @obj: a #GstObject to lock
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*
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* This macro will obtain a lock on the object, making serialization possible.
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* It blocks until the lock can be obtained.
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*/
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#define GST_OBJECT_LOCK(obj) g_mutex_lock(GST_OBJECT_GET_LOCK(obj))
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/**
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* GST_OBJECT_TRYLOCK:
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* @obj: a #GstObject.
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*
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* This macro will try to obtain a lock on the object, but will return with
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* FALSE if it can't get it immediately.
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*/
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#define GST_OBJECT_TRYLOCK(obj) g_mutex_trylock(GST_OBJECT_GET_LOCK(obj))
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/**
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* GST_OBJECT_UNLOCK:
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* @obj: a #GstObject to unlock.
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*
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* This macro releases a lock on the object.
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*/
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#define GST_OBJECT_UNLOCK(obj) g_mutex_unlock(GST_OBJECT_GET_LOCK(obj))
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/**
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* GST_OBJECT_NAME:
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* @obj: a #GstObject
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*
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* Get the name of this object
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*/
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#define GST_OBJECT_NAME(obj) (GST_OBJECT_CAST(obj)->name)
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/**
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* GST_OBJECT_PARENT:
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* @obj: a #GstObject
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*
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* Get the parent of this object
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*/
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#define GST_OBJECT_PARENT(obj) (GST_OBJECT_CAST(obj)->parent)
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/**
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* GST_OBJECT_FLAGS:
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* @obj: a #GstObject
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*
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* This macro returns the entire set of flags for the object.
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*/
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#define GST_OBJECT_FLAGS(obj) (GST_OBJECT_CAST (obj)->flags)
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/**
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* GST_OBJECT_FLAG_IS_SET:
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* @obj: a #GstObject
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* @flag: Flag to check for
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*
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* This macro checks to see if the given flag is set.
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*/
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#define GST_OBJECT_FLAG_IS_SET(obj,flag) ((GST_OBJECT_FLAGS (obj) & (flag)) == (flag))
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/**
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* GST_OBJECT_FLAG_SET:
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* @obj: a #GstObject
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* @flag: Flag to set
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*
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* This macro sets the given bits.
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*/
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#define GST_OBJECT_FLAG_SET(obj,flag) (GST_OBJECT_FLAGS (obj) |= (flag))
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/**
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* GST_OBJECT_FLAG_UNSET:
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* @obj: a #GstObject
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* @flag: Flag to set
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*
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* This macro usets the given bits.
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*/
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#define GST_OBJECT_FLAG_UNSET(obj,flag) (GST_OBJECT_FLAGS (obj) &= ~(flag))
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/**
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* GST_OBJECT_IS_DISPOSING:
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* @obj: a #GstObject
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*
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* Check if the given object is beeing destroyed.
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*/
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#define GST_OBJECT_IS_DISPOSING(obj) (GST_OBJECT_FLAG_IS_SET (obj, GST_OBJECT_DISPOSING))
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/**
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* GST_OBJECT_IS_FLOATING:
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* @obj: a #GstObject
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*
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* Check if the given object is floating (has no owner).
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*/
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#define GST_OBJECT_IS_FLOATING(obj) (GST_OBJECT_FLAG_IS_SET (obj, GST_OBJECT_FLOATING))
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typedef struct _GstObject GstObject;
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typedef struct _GstObjectClass GstObjectClass;
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/**
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* GstObject:
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* @refcount: unused
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* @lock: object LOCK
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* @name: The name of the object
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* @name_prefix: unused
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* @parent: this object's parent, weak ref
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* @flags: use GST_OBJECT_IS_XXX macros to access the flags
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*
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* GStreamer base object class.
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*/
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struct _GstObject {
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GObject object;
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/*< public >*/
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gint refcount; /* unused (FIXME 0.11: remove) */
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/*< public >*/ /* with LOCK */
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GMutex *lock; /* object LOCK */
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gchar *name; /* object name */
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gchar *name_prefix; /* (un)used for debugging (FIXME 0.11: remove) */
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GstObject *parent; /* this object's parent, weak ref */
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guint32 flags;
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/*< private >*/
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gpointer _gst_reserved;
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};
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/**
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* GST_CLASS_GET_LOCK:
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* @obj: a #GstObjectClass
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*
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* This macro will return the class lock used to protect deep_notify signal
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* emission on thread-unsafe glib versions (glib < 2.8).
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*/
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#define GST_CLASS_GET_LOCK(obj) (GST_OBJECT_CLASS_CAST(obj)->lock)
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/**
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* GST_CLASS_LOCK:
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* @obj: a #GstObjectClass
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*
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* Lock the class.
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*/
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#define GST_CLASS_LOCK(obj) (g_static_rec_mutex_lock(GST_CLASS_GET_LOCK(obj)))
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/**
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* GST_CLASS_TRYLOCK:
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* @obj: a #GstObjectClass
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*
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* Try to lock the class, returns TRUE if class could be locked.
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*/
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#define GST_CLASS_TRYLOCK(obj) (g_static_rec_mutex_trylock(GST_CLASS_GET_LOCK(obj)))
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/**
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* GST_CLASS_UNLOCK:
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* @obj: a #GstObjectClass
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*
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* Unlock the class.
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*/
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#define GST_CLASS_UNLOCK(obj) (g_static_rec_mutex_unlock(GST_CLASS_GET_LOCK(obj)))
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/**
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* GstObjectClass:
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* @parent_class: parent
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* @path_string_separator: separator used by gst_object_get_path_string()
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* @signal_object: is used to signal to the whole class
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* @lock: class lock to be used with GST_CLASS_GET_LOCK(), GST_CLASS_LOCK(), GST_CLASS_UNLOCK() and others.
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* @parent_set: default signal handler
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* @parent_unset: default signal handler
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* @object_saved: default signal handler
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* @deep_notify: default signal handler
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* @save_thyself: xml serialisation
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* @restore_thyself: xml de-serialisation
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*
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* GStreamer base object class.
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*/
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struct _GstObjectClass {
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GObjectClass parent_class;
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const gchar *path_string_separator;
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GObject *signal_object;
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/* FIXME-0.11: remove this, plus the above GST_CLASS_*_LOCK macros */
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GStaticRecMutex *lock;
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/* signals */
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/* FIXME-0.11: remove, and pass NULL in g_signal_new(), we never used them */
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void (*parent_set) (GstObject * object, GstObject * parent);
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void (*parent_unset) (GstObject * object, GstObject * parent);
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/* FIXME 0.11: Remove this, it's deprecated */
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void (*object_saved) (GstObject * object, GstXmlNodePtr parent);
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void (*deep_notify) (GstObject * object, GstObject * orig, GParamSpec * pspec);
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/*< public >*/
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/* virtual methods for subclasses */
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/* FIXME 0.11: Remove this, it's deprecated */
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GstXmlNodePtr (*save_thyself) (GstObject * object, GstXmlNodePtr parent);
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void (*restore_thyself) (GstObject * object, GstXmlNodePtr self);
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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/* normal GObject stuff */
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GType gst_object_get_type (void);
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/* name routines */
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gboolean gst_object_set_name (GstObject *object, const gchar *name);
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gchar* gst_object_get_name (GstObject *object);
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#ifndef GST_DISABLE_DEPRECATED
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void gst_object_set_name_prefix (GstObject *object, const gchar *name_prefix);
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gchar* gst_object_get_name_prefix (GstObject *object);
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#endif
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/* parentage routines */
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gboolean 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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gboolean gst_object_has_ancestor (GstObject *object, GstObject *ancestor);
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void gst_object_default_deep_notify (GObject *object, GstObject *orig,
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GParamSpec *pspec, gchar **excluded_props);
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/* refcounting + life cycle */
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gpointer gst_object_ref (gpointer object);
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void gst_object_unref (gpointer object);
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void gst_object_ref_sink (gpointer object);
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void gst_object_sink (gpointer object);
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/* replace object pointer */
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void gst_object_replace (GstObject **oldobj, GstObject *newobj);
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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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/* misc utils */
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gboolean gst_object_check_uniqueness (GList *list, const gchar *name);
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/* load/save */
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#ifndef GST_DISABLE_DEPRECATED
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#ifndef GST_DISABLE_LOADSAVE
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GstXmlNodePtr gst_object_save_thyself (GstObject *object, GstXmlNodePtr parent);
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void gst_object_restore_thyself (GstObject *object, GstXmlNodePtr self);
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#else
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#if defined __GNUC__ && __GNUC__ >= 3
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#pragma GCC poison gst_object_save_thyself
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#pragma GCC poison gst_object_restore_thyself
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#endif
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#endif
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#endif
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/* class signal stuff */
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guint gst_class_signal_connect (GstObjectClass *klass,
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const gchar *name,
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gpointer func,
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gpointer func_data);
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#ifndef GST_DISABLE_DEPRECATED
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#ifndef GST_DISABLE_LOADSAVE
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void gst_class_signal_emit_by_name (GstObject * object,
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const gchar * name,
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GstXmlNodePtr self);
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#else
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#if defined __GNUC__ && __GNUC__ >= 3
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#pragma GCC poison gst_class_signal_emit_by_name
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#endif
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#endif
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#endif
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G_END_DECLS
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#endif /* __GST_OBJECT_H__ */
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