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/* 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;
}
}
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