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 30 G_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 41 typedef struct _GstSystemClock GstSystemClock; 42 typedef struct _GstSystemClockClass GstSystemClockClass; 43 typedef 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 */ 56 typedef 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 */ 68 struct _GstSystemClock { 69 GstClock clock; 70 71 /*< private >*/ 72 GstSystemClockPrivate *priv; 73 74 gpointer _gst_reserved[GST_PADDING]; 75 }; 76 77 struct _GstSystemClockClass { 78 GstClockClass parent_class; 79 80 /*< private >*/ 81 gpointer _gst_reserved[GST_PADDING]; 82 }; 83 84 GST_API 85 GType gst_system_clock_get_type (void); 86 87 GST_API 88 GstClock* gst_system_clock_obtain (void); 89 90 GST_API 91 void gst_system_clock_set_default (GstClock *new_clock); 92 93 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstSystemClock, gst_object_unref) 94 95 G_END_DECLS 96 97 #endif /* __GST_SYSTEM_CLOCK_H__ */ 98