mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-22 00:06:36 +00:00
ecd88e381d
Original commit message from CVS: Revert again, this time without post-commit reindent hooks to put back the indentation :-)
109 lines
4.2 KiB
C
109 lines
4.2 KiB
C
/* GStreamer
|
|
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2000 Wim Taymans <wtay@chello.be>
|
|
*
|
|
* gstutils.h: Header for various utility functions
|
|
*
|
|
* 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_UTILS_H__
|
|
#define __GST_UTILS_H__
|
|
|
|
#include <glib.h>
|
|
#include <gst/gstelement.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
void gst_util_set_value_from_string (GValue *value, const gchar *value_str);
|
|
void gst_util_set_object_arg (GObject *object, const gchar *name, const gchar *value);
|
|
|
|
void gst_util_dump_mem (guchar *mem, guint size);
|
|
|
|
void gst_print_pad_caps (GString *buf, gint indent, GstPad *pad);
|
|
void gst_print_element_args (GString *buf, gint indent, GstElement *element);
|
|
|
|
|
|
/* Macros for defining classes. Ideas taken from Bonobo, which took theirs
|
|
from Nautilus and GOB. */
|
|
|
|
/* Define the boilerplate type stuff to reduce typos and code size. Defines
|
|
the get_type method and the parent_class static variable.
|
|
void additional_initializations (GType type) is for initializing interfaces
|
|
and stuff like that */
|
|
|
|
#define GST_BOILERPLATE_FULL(type, type_as_function, parent_type, \
|
|
parent_type_macro, additional_initializations) \
|
|
\
|
|
static void type_as_function ## _base_init (gpointer g_class); \
|
|
static void type_as_function ## _class_init (type ## Class *g_class); \
|
|
static void type_as_function ## _init (type *object); \
|
|
static parent_type ## Class *parent_class = NULL; \
|
|
static void \
|
|
type_as_function ## _class_init_trampoline (gpointer g_class, \
|
|
gpointer data) \
|
|
{ \
|
|
parent_class = (parent_type ## Class *) g_type_class_peek_parent (g_class); \
|
|
type_as_function ## _class_init ((type ## Class *)g_class); \
|
|
} \
|
|
\
|
|
GType \
|
|
type_as_function ## _get_type (void) \
|
|
{ \
|
|
static GType object_type = 0; \
|
|
if (object_type == 0) { \
|
|
static const GTypeInfo object_info = { \
|
|
sizeof (type ## Class), \
|
|
type_as_function ## _base_init, \
|
|
NULL, /* base_finalize */ \
|
|
type_as_function ## _class_init_trampoline, \
|
|
NULL, /* class_finalize */ \
|
|
NULL, /* class_data */ \
|
|
sizeof (type), \
|
|
0, /* n_preallocs */ \
|
|
(GInstanceInitFunc) type_as_function ## _init \
|
|
}; \
|
|
object_type = g_type_register_static (parent_type_macro, #type, \
|
|
&object_info, 0); \
|
|
additional_initializations (object_type); \
|
|
} \
|
|
return object_type; \
|
|
}
|
|
|
|
#define __GST_DO_NOTHING(type) /* NOP */
|
|
#define GST_BOILERPLATE(type,type_as_function,parent_type,parent_type_macro) \
|
|
GST_BOILERPLATE_FULL (type, type_as_function, parent_type, parent_type_macro, \
|
|
__GST_DO_NOTHING)
|
|
|
|
/* Just call the parent handler. This assumes that there is a variable
|
|
* named parent_class that points to the (duh!) parent class. Note that
|
|
* this macro is not to be used with things that return something, use
|
|
* the _WITH_DEFAULT version for that */
|
|
#define GST_CALL_PARENT(parent_class_cast, name, args) \
|
|
((parent_class_cast(parent_class)->name != NULL) ? \
|
|
parent_class_cast(parent_class)->name args : (void) 0)
|
|
|
|
/* Same as above, but in case there is no implementation, it evaluates
|
|
* to def_return */
|
|
#define GST_CALL_PARENT_WITH_DEFAULT(parent_class_cast, name, args, def_return) \
|
|
((parent_class_cast(parent_class)->name != NULL) ? \
|
|
parent_class_cast(parent_class)->name args : def_return)
|
|
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GST_UTILS_H__ */
|