mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-24 10:41:04 +00:00
139 lines
3.5 KiB
C
139 lines
3.5 KiB
C
/* GStreamer
|
|
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2000 Wim Taymans <wtay@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 "gstossclock.h"
|
|
|
|
static void gst_oss_clock_class_init (GstOssClockClass *klass);
|
|
static void gst_oss_clock_init (GstOssClock *clock);
|
|
|
|
static GstClockTime gst_oss_clock_get_internal_time (GstClock *clock);
|
|
|
|
static GstSystemClockClass *parent_class = NULL;
|
|
/* static guint gst_oss_clock_signals[LAST_SIGNAL] = { 0 }; */
|
|
|
|
GType
|
|
gst_oss_clock_get_type (void)
|
|
{
|
|
static GType clock_type = 0;
|
|
|
|
if (!clock_type) {
|
|
static const GTypeInfo clock_info = {
|
|
sizeof (GstOssClockClass),
|
|
NULL,
|
|
NULL,
|
|
(GClassInitFunc) gst_oss_clock_class_init,
|
|
NULL,
|
|
NULL,
|
|
sizeof (GstOssClock),
|
|
4,
|
|
(GInstanceInitFunc) gst_oss_clock_init,
|
|
NULL
|
|
};
|
|
clock_type = g_type_register_static (GST_TYPE_SYSTEM_CLOCK, "GstOssClock",
|
|
&clock_info, 0);
|
|
}
|
|
return clock_type;
|
|
}
|
|
|
|
|
|
static void
|
|
gst_oss_clock_class_init (GstOssClockClass *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_SYSTEM_CLOCK);
|
|
|
|
gstclock_class->get_internal_time = gst_oss_clock_get_internal_time;
|
|
}
|
|
|
|
static void
|
|
gst_oss_clock_init (GstOssClock *clock)
|
|
{
|
|
gst_object_set_name (GST_OBJECT (clock), "GstOssClock");
|
|
|
|
clock->prev1 = 0;
|
|
clock->prev2 = 0;
|
|
}
|
|
|
|
GstOssClock*
|
|
gst_oss_clock_new (gchar *name, GstOssClockGetTimeFunc func, gpointer user_data)
|
|
{
|
|
GstOssClock *oss_clock = GST_OSS_CLOCK (g_object_new (GST_TYPE_OSS_CLOCK, NULL));
|
|
|
|
oss_clock->func = func;
|
|
oss_clock->user_data = user_data;
|
|
oss_clock->adjust = 0;
|
|
|
|
return oss_clock;
|
|
}
|
|
|
|
void
|
|
gst_oss_clock_set_active (GstClock *clock, gboolean active)
|
|
{
|
|
GstOssClock *oss_clock = GST_OSS_CLOCK (clock);
|
|
GTimeVal timeval;
|
|
GstClockTime time;
|
|
GstClockTime osstime;
|
|
|
|
g_get_current_time (&timeval);
|
|
time = GST_TIMEVAL_TO_TIME (timeval);
|
|
osstime = oss_clock->func (clock, oss_clock->user_data);
|
|
|
|
if (active) {
|
|
oss_clock->adjust = time - osstime;
|
|
}
|
|
else {
|
|
oss_clock->adjust = osstime - time;
|
|
}
|
|
|
|
oss_clock->active = active;
|
|
}
|
|
|
|
static GstClockTime
|
|
gst_oss_clock_get_internal_time (GstClock *clock)
|
|
{
|
|
GstOssClock *oss_clock = GST_OSS_CLOCK (clock);
|
|
|
|
if (oss_clock->active) {
|
|
GstClockTime osstime;
|
|
|
|
osstime = oss_clock->func (clock, oss_clock->user_data) + oss_clock->adjust;
|
|
|
|
return osstime;
|
|
}
|
|
else {
|
|
GstClockTime time;
|
|
GTimeVal timeval;
|
|
|
|
g_get_current_time (&timeval);
|
|
time = GST_TIMEVAL_TO_TIME (timeval);
|
|
|
|
return time;
|
|
}
|
|
}
|
|
|