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abffdb2ac3
Add a property to select the clock type, currently REALTIME and MONOTONIC when posix timers are available. Implement the systemclock with GstPoll instead of GCond. This allows us to schedule timeouts with nanosecond precission on newer kernels and with ppoll support. It's also resilient to changes to the systemclock because of NTP or similar.
88 lines
2.8 KiB
C
88 lines
2.8 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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* gstsystemclock.h: A clock implementation based on system time
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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_SYSTEM_CLOCK_H__
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#define __GST_SYSTEM_CLOCK_H__
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#include <gst/gstclock.h>
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G_BEGIN_DECLS
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#define GST_TYPE_SYSTEM_CLOCK (gst_system_clock_get_type ())
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#define GST_SYSTEM_CLOCK(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SYSTEM_CLOCK, GstSystemClock))
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#define GST_SYSTEM_CLOCK_CAST(obj) ((GstSystemClock *)(obj))
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#define GST_IS_SYSTEM_CLOCK(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SYSTEM_CLOCK))
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#define GST_SYSTEM_CLOCK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SYSTEM_CLOCK, GstSystemClockClass))
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#define GST_IS_SYSTEM_CLOCK_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SYSTEM_CLOCK))
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#define GST_SYSTEM_CLOCK_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_SYSTEM_CLOCK, GstSystemClockClass))
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typedef struct _GstSystemClock GstSystemClock;
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typedef struct _GstSystemClockClass GstSystemClockClass;
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typedef struct _GstSystemClockPrivate GstSystemClockPrivate;
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/**
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* GstClockType:
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* @GST_CLOCK_TYPE_REALTIME: time since Epoch
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* @GST_CLOCK_TYPE_MONOTONIC: monotonic time since some unspecified starting
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* point
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*/
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typedef enum {
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GST_CLOCK_TYPE_REALTIME = 0,
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GST_CLOCK_TYPE_MONOTONIC = 1
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} GstClockType;
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/**
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* GstSystemClock:
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* @clock: The parent clock
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*
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* The default implementation of a #GstClock that uses the system time.
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*/
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struct _GstSystemClock {
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GstClock clock;
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/*< private >*/
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GThread *thread; /* thread for async notify */
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gboolean stopping;
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/* ABI added */
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GstSystemClockPrivate *priv;
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gpointer _gst_reserved[GST_PADDING - 1];
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};
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struct _GstSystemClockClass {
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GstClockClass parent_class;
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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GType gst_system_clock_get_type (void);
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GstClock* gst_system_clock_obtain (void);
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G_END_DECLS
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#endif /* __GST_SYSTEM_CLOCK_H__ */
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