mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-06-09 01:29:28 +00:00
6f96a24d2e
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.
124 lines
3.2 KiB
C
124 lines
3.2 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wim.taymans@chello.be>
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*
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* gstclock.c: Clock subsystem for maintaining time sync
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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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#include <sys/time.h>
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/* #define GST_DEBUG_ENABLED */
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#include "gst_private.h"
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#include "gstsystemclock.h"
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#define CLASS(clock) GST_SYSTEM_CLOCK_CLASS (G_OBJECT_GET_CLASS (clock))
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static GstClock *_the_system_clock = NULL;
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static void gst_system_clock_class_init (GstSystemClockClass *klass);
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static void gst_system_clock_init (GstSystemClock *clock);
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static GstClockTime gst_system_clock_get_internal_time (GstClock *clock);
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static guint64 gst_system_clock_get_resolution (GstClock *clock);
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static GstClockClass *parent_class = NULL;
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/* static guint gst_system_clock_signals[LAST_SIGNAL] = { 0 }; */
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GType
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gst_system_clock_get_type (void)
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{
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static GType clock_type = 0;
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if (!clock_type) {
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static const GTypeInfo clock_info = {
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sizeof (GstSystemClockClass),
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NULL,
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NULL,
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(GClassInitFunc) gst_system_clock_class_init,
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NULL,
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NULL,
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sizeof (GstSystemClock),
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4,
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(GInstanceInitFunc) gst_system_clock_init,
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NULL
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};
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clock_type = g_type_register_static (GST_TYPE_CLOCK, "GstSystemClock",
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&clock_info, 0);
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}
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return clock_type;
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}
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static void
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gst_system_clock_class_init (GstSystemClockClass *klass)
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{
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GObjectClass *gobject_class;
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GstObjectClass *gstobject_class;
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GstClockClass *gstclock_class;
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gobject_class = (GObjectClass*) klass;
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gstobject_class = (GstObjectClass*) klass;
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gstclock_class = (GstClockClass*) klass;
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parent_class = g_type_class_ref (GST_TYPE_CLOCK);
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gstclock_class->get_internal_time = gst_system_clock_get_internal_time;
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gstclock_class->get_resolution = gst_system_clock_get_resolution;
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}
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static void
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gst_system_clock_init (GstSystemClock *clock)
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{
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}
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/**
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* gst_system_clock_obtain
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*
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* Get a handle to the default system clock.
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*
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* Returns: the default clock.
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*/
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GstClock*
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gst_system_clock_obtain (void)
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{
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if (_the_system_clock == NULL) {
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_the_system_clock = GST_CLOCK (g_object_new (GST_TYPE_SYSTEM_CLOCK, NULL));
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gst_object_set_name (GST_OBJECT (_the_system_clock), "GstSystemClock");
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}
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return _the_system_clock;
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}
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static GstClockTime
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gst_system_clock_get_internal_time (GstClock *clock)
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{
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GTimeVal timeval;
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g_get_current_time (&timeval);
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return GST_TIMEVAL_TO_TIME (timeval);
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}
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static guint64
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gst_system_clock_get_resolution (GstClock *clock)
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{
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return 1 * GST_USECOND;
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}
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