gstreamer/gst/gstsystemclock.c
Wim Taymans 6f96a24d2e - The clock_wait now returns the difference between requested time and unlock time.
Original commit message from CVS:
- The clock_wait now returns the difference between requested time and
unlock time.
- Misc defines like GST_SECOND in gstclock.h
- remove pre/post in gstelement.c until fixed.
- added release_locks to gstelement so that the element can unlock itself
- added some more predefined events.
- added folowing functions to gstpad:
- convert function: get the relation between formats on this pad
- query function: get stats about the pad (position/total/latency)
- internal connect function: find out how this pad connects to other
pad internally to the element.
- generic pad_dispatcher.
- removed the last bits of pullregion
- use release_locks on the queue.
- added some events to queue
- make gstthread use the new release_locks function
- make the scheduler use the new clock_wait functions
- added events to fakesink
- added query functions to filesrc
- swap type and offset in the bytestream seek API to match fseek
- added some event handling in bytestream.
2002-05-26 21:54:27 +00:00

123 lines
3.2 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wim.taymans@chello.be>
*
* gstclock.c: Clock subsystem for maintaining time sync
*
* 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.
*/
#include <sys/time.h>
/* #define GST_DEBUG_ENABLED */
#include "gst_private.h"
#include "gstsystemclock.h"
#define CLASS(clock) GST_SYSTEM_CLOCK_CLASS (G_OBJECT_GET_CLASS (clock))
static GstClock *_the_system_clock = NULL;
static void gst_system_clock_class_init (GstSystemClockClass *klass);
static void gst_system_clock_init (GstSystemClock *clock);
static GstClockTime gst_system_clock_get_internal_time (GstClock *clock);
static guint64 gst_system_clock_get_resolution (GstClock *clock);
static GstClockClass *parent_class = NULL;
/* static guint gst_system_clock_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_system_clock_get_type (void)
{
static GType clock_type = 0;
if (!clock_type) {
static const GTypeInfo clock_info = {
sizeof (GstSystemClockClass),
NULL,
NULL,
(GClassInitFunc) gst_system_clock_class_init,
NULL,
NULL,
sizeof (GstSystemClock),
4,
(GInstanceInitFunc) gst_system_clock_init,
NULL
};
clock_type = g_type_register_static (GST_TYPE_CLOCK, "GstSystemClock",
&clock_info, 0);
}
return clock_type;
}
static void
gst_system_clock_class_init (GstSystemClockClass *klass)
{
GObjectClass *gobject_class;
GstObjectClass *gstobject_class;
GstClockClass *gstclock_class;
gobject_class = (GObjectClass*) klass;
gstobject_class = (GstObjectClass*) klass;
gstclock_class = (GstClockClass*) klass;
parent_class = g_type_class_ref (GST_TYPE_CLOCK);
gstclock_class->get_internal_time = gst_system_clock_get_internal_time;
gstclock_class->get_resolution = gst_system_clock_get_resolution;
}
static void
gst_system_clock_init (GstSystemClock *clock)
{
}
/**
* gst_system_clock_obtain
*
* Get a handle to the default system clock.
*
* Returns: the default clock.
*/
GstClock*
gst_system_clock_obtain (void)
{
if (_the_system_clock == NULL) {
_the_system_clock = GST_CLOCK (g_object_new (GST_TYPE_SYSTEM_CLOCK, NULL));
gst_object_set_name (GST_OBJECT (_the_system_clock), "GstSystemClock");
}
return _the_system_clock;
}
static GstClockTime
gst_system_clock_get_internal_time (GstClock *clock)
{
GTimeVal timeval;
g_get_current_time (&timeval);
return GST_TIMEVAL_TO_TIME (timeval);
}
static guint64
gst_system_clock_get_resolution (GstClock *clock)
{
return 1 * GST_USECOND;
}