1/* GStreamer
2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
4 * 2005 Wim Taymans <wim@fluendo.com>
5 *
6 * gstsystemclock.h: A clock implementation based on system time
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 */
23
24
25#ifndef __GST_SYSTEM_CLOCK_H__
26#define __GST_SYSTEM_CLOCK_H__
27
28#include <gst/gstclock.h>
29
30G_BEGIN_DECLS
31
32#define GST_TYPE_SYSTEM_CLOCK (gst_system_clock_get_type ())
33#define GST_SYSTEM_CLOCK(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SYSTEM_CLOCK, GstSystemClock))
34#define GST_SYSTEM_CLOCK_CAST(obj) ((GstSystemClock *)(obj))
35#define GST_IS_SYSTEM_CLOCK(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SYSTEM_CLOCK))
36#define GST_SYSTEM_CLOCK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SYSTEM_CLOCK, GstSystemClockClass))
37#define GST_IS_SYSTEM_CLOCK_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SYSTEM_CLOCK))
38#define GST_SYSTEM_CLOCK_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_SYSTEM_CLOCK, GstSystemClockClass))
39
40
41typedef struct _GstSystemClock GstSystemClock;
42typedef struct _GstSystemClockClass GstSystemClockClass;
43typedef struct _GstSystemClockPrivate GstSystemClockPrivate;
44
45/**
46 * GstClockType:
47 * @GST_CLOCK_TYPE_REALTIME: time since Epoch
48 * @GST_CLOCK_TYPE_MONOTONIC: monotonic time since some unspecified starting
49 * point
50 * @GST_CLOCK_TYPE_OTHER: some other time source is used (Since: 1.0.5)
51 * @GST_CLOCK_TYPE_TAI: time since Epoch, but using International Atomic Time
52 * as reference (Since: 1.18)
53 *
54 * The different kind of clocks.
55 */
56typedef enum {
57 GST_CLOCK_TYPE_REALTIME = 0,
58 GST_CLOCK_TYPE_MONOTONIC = 1,
59 GST_CLOCK_TYPE_OTHER = 2,
60 GST_CLOCK_TYPE_TAI = 3
61} GstClockType;
62
63/**
64 * GstSystemClock:
65 *
66 * The default implementation of a #GstClock that uses the system time.
67 */
68struct _GstSystemClock {
69 GstClock clock;
70
71 /*< private >*/
72 GstSystemClockPrivate *priv;
73
74 gpointer _gst_reserved[GST_PADDING];
75};
76
77struct _GstSystemClockClass {
78 GstClockClass parent_class;
79
80 /*< private >*/
81 gpointer _gst_reserved[GST_PADDING];
82};
83
84GST_API
85GType gst_system_clock_get_type (void);
86
87GST_API
88GstClock* gst_system_clock_obtain (void);
89
90GST_API
91void gst_system_clock_set_default (GstClock *new_clock);
92
93G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstSystemClock, gst_object_unref)
94
95G_END_DECLS
96
97#endif /* __GST_SYSTEM_CLOCK_H__ */
98

source code of include/gstreamer-1.0/gst/gstsystemclock.h