mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-08 10:31:05 +00:00
2061fc0ccb
The cycleCount register is 13 bits long and the cycleOffset one is 12 bits long. To read the cycleCount register we need to shift 12 bits and not 13. Fixes #615461
153 lines
4 KiB
C
153 lines
4 KiB
C
/* GStreamer
|
|
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2000 Wim Taymans <wtay@chello.be>
|
|
* Copyright (C) 2009 David Schleef <ds@schleef.org>
|
|
*
|
|
* gst1394clock.c: Clock for use by IEEE 1394 plugins
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "gst1394clock.h"
|
|
|
|
GST_DEBUG_CATEGORY_STATIC (gst_1394_clock_debug);
|
|
#define GST_CAT_DEFAULT gst_1394_clock_debug
|
|
|
|
static void gst_1394_clock_class_init (Gst1394ClockClass * klass);
|
|
static void gst_1394_clock_init (Gst1394Clock * clock);
|
|
|
|
static GstClockTime gst_1394_clock_get_internal_time (GstClock * clock);
|
|
|
|
static GstSystemClockClass *parent_class = NULL;
|
|
|
|
/* static guint gst_1394_clock_signals[LAST_SIGNAL] = { 0 }; */
|
|
|
|
GType
|
|
gst_1394_clock_get_type (void)
|
|
{
|
|
static GType clock_type = 0;
|
|
|
|
if (!clock_type) {
|
|
static const GTypeInfo clock_info = {
|
|
sizeof (Gst1394ClockClass),
|
|
NULL,
|
|
NULL,
|
|
(GClassInitFunc) gst_1394_clock_class_init,
|
|
NULL,
|
|
NULL,
|
|
sizeof (Gst1394Clock),
|
|
4,
|
|
(GInstanceInitFunc) gst_1394_clock_init,
|
|
NULL
|
|
};
|
|
|
|
clock_type = g_type_register_static (GST_TYPE_SYSTEM_CLOCK, "Gst1394Clock",
|
|
&clock_info, 0);
|
|
}
|
|
return clock_type;
|
|
}
|
|
|
|
|
|
static void
|
|
gst_1394_clock_class_init (Gst1394ClockClass * klass)
|
|
{
|
|
GstClockClass *gstclock_class;
|
|
|
|
gstclock_class = (GstClockClass *) klass;
|
|
|
|
parent_class = g_type_class_peek_parent (klass);
|
|
|
|
gstclock_class->get_internal_time = gst_1394_clock_get_internal_time;
|
|
|
|
GST_DEBUG_CATEGORY_INIT (gst_1394_clock_debug, "1394clock", 0, "1394clock");
|
|
}
|
|
|
|
static void
|
|
gst_1394_clock_init (Gst1394Clock * clock)
|
|
{
|
|
clock->last_time = 0;
|
|
GST_OBJECT_FLAG_SET (clock, GST_CLOCK_FLAG_CAN_SET_MASTER);
|
|
}
|
|
|
|
/**
|
|
* gst_1394_clock_new:
|
|
* @name: the name of the clock
|
|
*
|
|
* Create a new #Gst1394Clock instance.
|
|
*
|
|
* Returns: a new #Gst1394Clock
|
|
*/
|
|
Gst1394Clock *
|
|
gst_1394_clock_new (const gchar * name)
|
|
{
|
|
Gst1394Clock *_1394clock =
|
|
GST_1394_CLOCK (g_object_new (GST_TYPE_1394_CLOCK, "name", name, NULL));
|
|
|
|
return _1394clock;
|
|
}
|
|
|
|
static GstClockTime
|
|
gst_1394_clock_get_internal_time (GstClock * clock)
|
|
{
|
|
Gst1394Clock *_1394clock;
|
|
GstClockTime result;
|
|
guint32 cycle_timer;
|
|
guint64 local_time;
|
|
|
|
_1394clock = GST_1394_CLOCK_CAST (clock);
|
|
|
|
if (_1394clock->handle != NULL) {
|
|
raw1394_read_cycle_timer (_1394clock->handle, &cycle_timer, &local_time);
|
|
|
|
if (cycle_timer < _1394clock->cycle_timer_lo) {
|
|
GST_LOG_OBJECT (clock, "overflow %u to %u",
|
|
_1394clock->cycle_timer_lo, cycle_timer);
|
|
|
|
_1394clock->cycle_timer_hi++;
|
|
}
|
|
_1394clock->cycle_timer_lo = cycle_timer;
|
|
|
|
/* get the seconds from the cycleSeconds counter */
|
|
result = (((((guint64) _1394clock->cycle_timer_hi) << 32) |
|
|
cycle_timer) >> 25) * GST_SECOND;
|
|
/* add the microseconds from the cycleCount counter */
|
|
result += (((cycle_timer >> 12) & 0x1fff) * 125) * GST_USECOND;
|
|
|
|
GST_LOG_OBJECT (clock, "result %" GST_TIME_FORMAT, GST_TIME_ARGS (result));
|
|
} else {
|
|
result = GST_CLOCK_TIME_NONE;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
void
|
|
gst_1394_clock_set_handle (Gst1394Clock * clock, raw1394handle_t handle)
|
|
{
|
|
clock->handle = handle;
|
|
clock->cycle_timer_lo = 0;
|
|
clock->cycle_timer_hi = 0;
|
|
}
|
|
|
|
void
|
|
gst_1394_clock_unset_handle (Gst1394Clock * clock)
|
|
{
|
|
clock->handle = NULL;
|
|
}
|