mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-18 07:47:17 +00:00
a9d1a493a7
This changes some APIs in compatible ways: - Some functions now take "const char *" arguments, not "char *" - Some structs now have "conts char *" members, not "char *" The changes may cause warnings when compiling with the right warning flags. You've been warned. Also adds -Wwrite-strings as a warning flag in configure.ac. https://bugzilla.gnome.org/show_bug.cgi?id=611692
346 lines
10 KiB
C
346 lines
10 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., 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>
|
|
|
|
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))
|
|
|
|
/* make sure we don't change the object size but still make it compile
|
|
* without libxml */
|
|
#ifdef GST_DISABLE_LOADSAVE
|
|
#define GstXmlNodePtr gpointer
|
|
#else
|
|
#define GstXmlNodePtr xmlNodePtr
|
|
#endif
|
|
|
|
/**
|
|
* GstObjectFlags:
|
|
* @GST_OBJECT_DISPOSING: the object is been destroyed, don't use it anymore
|
|
* @GST_OBJECT_FLOATING: the object has a floating reference count (e.g. its
|
|
* not assigned to a bin)
|
|
* @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_DISPOSING = (1<<0),
|
|
GST_OBJECT_FLOATING = (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_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
|
|
*/
|
|
#define GST_OBJECT_NAME(obj) (GST_OBJECT_CAST(obj)->name)
|
|
/**
|
|
* GST_OBJECT_PARENT:
|
|
* @obj: a #GstObject
|
|
*
|
|
* Get the parent of this object
|
|
*/
|
|
#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 usets the given bits.
|
|
*/
|
|
#define GST_OBJECT_FLAG_UNSET(obj,flag) (GST_OBJECT_FLAGS (obj) &= ~(flag))
|
|
|
|
|
|
/**
|
|
* GST_OBJECT_IS_DISPOSING:
|
|
* @obj: a #GstObject
|
|
*
|
|
* Check if the given object is beeing destroyed.
|
|
*/
|
|
#define GST_OBJECT_IS_DISPOSING(obj) (GST_OBJECT_FLAG_IS_SET (obj, GST_OBJECT_DISPOSING))
|
|
/**
|
|
* GST_OBJECT_IS_FLOATING:
|
|
* @obj: a #GstObject
|
|
*
|
|
* Check if the given object is floating (has no owner).
|
|
*/
|
|
#define GST_OBJECT_IS_FLOATING(obj) (GST_OBJECT_FLAG_IS_SET (obj, GST_OBJECT_FLOATING))
|
|
|
|
typedef struct _GstObject GstObject;
|
|
typedef struct _GstObjectClass GstObjectClass;
|
|
|
|
/**
|
|
* GstObject:
|
|
* @refcount: unused
|
|
* @lock: object LOCK
|
|
* @name: The name of the object
|
|
* @name_prefix: used for debugging
|
|
* @parent: this object's parent, weak ref
|
|
* @flags: use GST_OBJECT_IS_XXX macros to access the flags
|
|
*
|
|
* GStreamer base object class.
|
|
*/
|
|
struct _GstObject {
|
|
GObject object;
|
|
|
|
/*< public >*/
|
|
gint refcount;
|
|
|
|
/*< public >*/ /* with LOCK */
|
|
GMutex *lock; /* object LOCK */
|
|
gchar *name; /* object name */
|
|
gchar *name_prefix; /* used for debugging */
|
|
GstObject *parent; /* this object's parent, weak ref */
|
|
guint32 flags;
|
|
|
|
/*< private >*/
|
|
gpointer _gst_reserved;
|
|
};
|
|
|
|
/**
|
|
* GST_CLASS_GET_LOCK:
|
|
* @obj: a #GstObjectClass
|
|
*
|
|
* This macro will return the class lock used to protect deep_notify signal
|
|
* emission on thread-unsafe glib versions (glib < 2.8).
|
|
*/
|
|
#define GST_CLASS_GET_LOCK(obj) (GST_OBJECT_CLASS_CAST(obj)->lock)
|
|
/**
|
|
* GST_CLASS_LOCK:
|
|
* @obj: a #GstObjectClass
|
|
*
|
|
* Lock the class.
|
|
*/
|
|
#define GST_CLASS_LOCK(obj) (g_static_rec_mutex_lock(GST_CLASS_GET_LOCK(obj)))
|
|
/**
|
|
* GST_CLASS_TRYLOCK:
|
|
* @obj: a #GstObjectClass
|
|
*
|
|
* Try to lock the class, returns TRUE if class could be locked.
|
|
*/
|
|
#define GST_CLASS_TRYLOCK(obj) (g_static_rec_mutex_trylock(GST_CLASS_GET_LOCK(obj)))
|
|
/**
|
|
* GST_CLASS_UNLOCK:
|
|
* @obj: a #GstObjectClass
|
|
*
|
|
* Unlock the class.
|
|
*/
|
|
#define GST_CLASS_UNLOCK(obj) (g_static_rec_mutex_unlock(GST_CLASS_GET_LOCK(obj)))
|
|
|
|
/**
|
|
* GstObjectClass:
|
|
* @parent_class: parent
|
|
* @path_string_separator: separator used by gst_object_get_path_string()
|
|
* @signal_object: is used to signal to the whole class
|
|
* @lock: class lock to be used with GST_CLASS_GET_LOCK(), GST_CLASS_LOCK(), GST_CLASS_UNLOCK() and others.
|
|
* @parent_set: default signal handler
|
|
* @parent_unset: default signal handler
|
|
* @object_saved: default signal handler
|
|
* @deep_notify: default signal handler
|
|
* @save_thyself: xml serialisation
|
|
* @restore_thyself: xml de-serialisation
|
|
*
|
|
* GStreamer base object class.
|
|
*/
|
|
struct _GstObjectClass {
|
|
GObjectClass parent_class;
|
|
|
|
const gchar *path_string_separator;
|
|
GObject *signal_object;
|
|
|
|
/* FIXME-0.11: remove this, plus the above GST_CLASS_*_LOCK macros */
|
|
GStaticRecMutex *lock;
|
|
|
|
/* signals */
|
|
/* FIXME-0.11: remove, and pass NULL in g_signal_new(), we never used them */
|
|
void (*parent_set) (GstObject * object, GstObject * parent);
|
|
void (*parent_unset) (GstObject * object, GstObject * parent);
|
|
void (*object_saved) (GstObject * object, GstXmlNodePtr parent);
|
|
void (*deep_notify) (GstObject * object, GstObject * orig, GParamSpec * pspec);
|
|
|
|
/*< public >*/
|
|
/* virtual methods for subclasses */
|
|
GstXmlNodePtr (*save_thyself) (GstObject * object, GstXmlNodePtr parent);
|
|
void (*restore_thyself) (GstObject * object, GstXmlNodePtr self);
|
|
|
|
/*< private >*/
|
|
gpointer _gst_reserved[GST_PADDING];
|
|
};
|
|
|
|
/* normal GObject stuff */
|
|
GType gst_object_get_type (void);
|
|
|
|
/* name routines */
|
|
gboolean gst_object_set_name (GstObject *object, const gchar *name);
|
|
gchar* gst_object_get_name (GstObject *object);
|
|
void gst_object_set_name_prefix (GstObject *object, const gchar *name_prefix);
|
|
gchar* gst_object_get_name_prefix (GstObject *object);
|
|
|
|
/* parentage routines */
|
|
gboolean gst_object_set_parent (GstObject *object, GstObject *parent);
|
|
GstObject* gst_object_get_parent (GstObject *object);
|
|
void gst_object_unparent (GstObject *object);
|
|
gboolean gst_object_has_ancestor (GstObject *object, GstObject *ancestor);
|
|
|
|
void gst_object_default_deep_notify (GObject *object, GstObject *orig,
|
|
GParamSpec *pspec, gchar **excluded_props);
|
|
|
|
/* refcounting + life cycle */
|
|
gpointer gst_object_ref (gpointer object);
|
|
void gst_object_unref (gpointer object);
|
|
void gst_object_ref_sink (gpointer object);
|
|
void gst_object_sink (gpointer object);
|
|
|
|
/* replace object pointer */
|
|
void gst_object_replace (GstObject **oldobj, GstObject *newobj);
|
|
|
|
/* printing out the 'path' of the object */
|
|
gchar * gst_object_get_path_string (GstObject *object);
|
|
|
|
/* misc utils */
|
|
gboolean gst_object_check_uniqueness (GList *list, const gchar *name);
|
|
|
|
/* load/save */
|
|
#ifndef GST_DISABLE_LOADSAVE
|
|
GstXmlNodePtr gst_object_save_thyself (GstObject *object, GstXmlNodePtr parent);
|
|
void gst_object_restore_thyself (GstObject *object, GstXmlNodePtr self);
|
|
#else
|
|
#if defined __GNUC__ && __GNUC__ >= 3
|
|
#pragma GCC poison gst_object_save_thyself
|
|
#pragma GCC poison gst_object_restore_thyself
|
|
#endif
|
|
#endif
|
|
|
|
/* class signal stuff */
|
|
guint gst_class_signal_connect (GstObjectClass *klass,
|
|
const gchar *name,
|
|
gpointer func,
|
|
gpointer func_data);
|
|
|
|
#ifndef GST_DISABLE_LOADSAVE
|
|
void gst_class_signal_emit_by_name (GstObject * object,
|
|
const gchar * name,
|
|
GstXmlNodePtr self);
|
|
#else
|
|
#if defined __GNUC__ && __GNUC__ >= 3
|
|
#pragma GCC poison gst_class_signal_emit_by_name
|
|
#endif
|
|
#endif
|
|
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GST_OBJECT_H__ */
|
|
|