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check/: Add a most minimal test for the net client clock. More to come later.

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Original commit message from CVS:
2005-11-17  Andy Wingo  <wingo@pobox.com>

* check/Makefile.am (check_PROGRAMS):
* check/net/gstnetclientclock.c: Add a most minimal test for the
net client clock. More to come later.

* gst/net/gstnet.h:
* gst/net/Makefile.am: Add netclientclock.

* gst/net/gstnetclientclock.h:
* gst/net/gstnetclientclock.c: New files, implement an untested
GstClock that takes its time from a network time provider.
Implements the algorithm in network-clock.scm.

* tests/network-clock.scm (*window-size*): Rename from
*queue-length*.
* tests/network-clock.scm (network-time):
* tests/network-clock-utils.scm (q-push): Update callers.
This commit is contained in:
Andy Wingo 2005-11-17 17:55:17 +00:00
parent 40e4311d94
commit d56b83f662
19 changed files with 1697 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

19
ChangeLog
View file

@ -1,3 +1,22 @@
2005-11-17 Andy Wingo <wingo@pobox.com>
* check/Makefile.am (check_PROGRAMS):
* check/net/gstnetclientclock.c: Add a most minimal test for the
net client clock. More to come later.
* gst/net/gstnet.h:
* gst/net/Makefile.am: Add netclientclock.
* gst/net/gstnetclientclock.h:
* gst/net/gstnetclientclock.c: New files, implement an untested
GstClock that takes its time from a network time provider.
Implements the algorithm in network-clock.scm.
* tests/network-clock.scm (*window-size*): Rename from
*queue-length*.
* tests/network-clock.scm (network-time):
* tests/network-clock-utils.scm (q-push): Update callers.
2005-11-17 Wim Taymans <wim@fluendo.com>
* gst/gstbin.c: (gst_bin_provide_clock_func),

4
check/Makefile.am
View file

@ -57,6 +57,7 @@ check_PROGRAMS = \
states/sinks \
gst-libs/controller \
gst-libs/gdp \
net/gstnetclientclock \
net/gstnettimeprovider
TESTS = $(check_PROGRAMS)
@ -79,6 +80,9 @@ gst_libs_controller_LDADD = \
$(top_builddir)/libs/gst/controller/libgstcontroller-@GST_MAJORMINOR@.la \
$(LDADD)
net_gstnetclientclock_LDADD = \
$(top_builddir)/gst/net/libgstnet-tempname-@GST_MAJORMINOR@.la \
$(LDADD)
net_gstnettimeprovider_LDADD = \
$(top_builddir)/gst/net/libgstnet-tempname-@GST_MAJORMINOR@.la \
$(LDADD)

137
check/net/gstnetclientclock.c Normal file
View file

@ -0,0 +1,137 @@
/* GStreamer
* Copyright (C) 2005 Andy Wingo <wingo@pobox.com>
*
* gstnetclientclock.c: Unit test for the network client clock
*
* 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 <gst/check/gstcheck.h>
#include <gst/net/gstnet.h>
#include <unistd.h>
GST_START_TEST (test_instantiation)
{
GstClock *client, *local;
local = gst_system_clock_obtain ();
client = gst_net_client_clock_new (NULL, "127.0.0.1", 1234, GST_SECOND);
fail_unless (local != NULL, "failed to get system clock");
fail_unless (client != NULL, "failed to get network client clock");
/* one for gstreamer, one for us */
ASSERT_OBJECT_REFCOUNT (local, "system clock", 2);
ASSERT_OBJECT_REFCOUNT (client, "network client clock", 1);
gst_object_unref (client);
ASSERT_OBJECT_REFCOUNT (local, "net time provider", 2);
gst_object_unref (local);
}
GST_END_TEST;
#if 0
GST_START_TEST (test_functioning)
{
GstNetTimeProvider *ntp;
GstNetTimePacket *packet;
GstClock *clock;
GstClockTime local;
struct sockaddr_in servaddr;
gint port = -1, sockfd, ret;
socklen_t len;
clock = gst_system_clock_obtain ();
fail_unless (clock != NULL, "failed to get system clock");
ntp = gst_net_time_provider_new (clock, "127.0.0.1", -1);
fail_unless (ntp != NULL, "failed to create net time provider");
g_object_get (ntp, "port", &port, NULL);
fail_unless (port > 0);
sockfd = socket (AF_INET, SOCK_DGRAM, 0);
fail_if (sockfd < 0, "socket failed");
memset (&servaddr, 0, sizeof (servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons (port);
inet_aton ("127.0.0.1", &servaddr.sin_addr);
packet = gst_net_time_packet_new (NULL);
fail_unless (packet != NULL, "failed to create packet");
packet->local_time = local = gst_clock_get_time (clock);
len = sizeof (servaddr);
ret = gst_net_time_packet_send (packet, sockfd,
(struct sockaddr *) &servaddr, len);
fail_unless (ret == GST_NET_TIME_PACKET_SIZE, "failed to send packet");
g_free (packet);
packet = gst_net_time_packet_receive (sockfd, (struct sockaddr *) &servaddr,
&len);
fail_unless (packet != NULL, "failed to receive packet");
fail_unless (packet->local_time == local, "local time is not the same");
fail_unless (packet->remote_time > local, "remote time not after local time");
fail_unless (packet->remote_time < gst_clock_get_time (clock),
"remote time in the future");
g_free (packet);
close (sockfd);
gst_object_unref (ntp);
gst_object_unref (clock);
}
GST_END_TEST;
#endif
Suite *
gst_net_client_clock_suite (void)
{
Suite *s = suite_create ("GstNetClientClock");
TCase *tc_chain = tcase_create ("generic tests");
suite_add_tcase (s, tc_chain);
tcase_add_test (tc_chain, test_instantiation);
/* tcase_add_test (tc_chain, test_functioning); */
return s;
}
int
main (int argc, char **argv)
{
int nf;
Suite *s = gst_net_client_clock_suite ();
SRunner *sr = srunner_create (s);
gst_check_init (&argc, &argv);
srunner_run_all (sr, CK_NORMAL);
nf = srunner_ntests_failed (sr);
srunner_free (sr);
return nf;
}

2
check/net/gstnettimeprovider.c
View file

@ -74,7 +74,7 @@ GST_START_TEST (test_functioning)
memset (&servaddr, 0, sizeof (servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = port;
servaddr.sin_port = htons (port);
inet_aton ("127.0.0.1", &servaddr.sin_addr);
packet = gst_net_time_packet_new (NULL);

2
gst/net/Makefile.am
View file

@ -5,10 +5,12 @@ lib_LTLIBRARIES = libgstnet-tempname-@GST_MAJORMINOR@.la
libgstnet_tempname_@GST_MAJORMINOR@_includedir = $(includedir)/gstreamer-@GST_MAJORMINOR@/gst/net
libgstnet_tempname_@GST_MAJORMINOR@_include_HEADERS = \
gstnet.h \
gstnetclientclock.h \
gstnettimepacket.h \
gstnettimeprovider.h
libgstnet_tempname_@GST_MAJORMINOR@_la_SOURCES = \
gstnetclientclock.c \
gstnettimepacket.c \
gstnettimeprovider.c

1
gst/net/gstnet.h
View file

@ -22,6 +22,7 @@
#define __GST_NET_H__
#include <gst/net/gstnetclientclock.h>
#include <gst/net/gstnettimepacket.h>
#include <gst/net/gstnettimeprovider.h>

592
gst/net/gstnetclientclock.c Normal file
View file

@ -0,0 +1,592 @@
/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2005 Wim Taymans <wim@fluendo.com>
* 2005 Andy Wingo <wingo@pobox.com>
*
* gstnetclientclock.h: clock that synchronizes itself to a time provider over
* the network
*
* 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 <unistd.h>
#include "gstnettimepacket.h"
#include "gstnetclientclock.h"
GST_DEBUG_CATEGORY (ncc_debug);
#define GST_CAT_DEFAULT (ncc_debug)
/* the select call is also performed on the control sockets, that way
* we can send special commands to unblock or restart the select call */
#define CONTROL_RESTART 'R' /* restart the select call */
#define CONTROL_STOP 'S' /* stop the select call */
#define CONTROL_SOCKETS(self) self->control_sock
#define WRITE_SOCKET(self) self->control_sock[1]
#define READ_SOCKET(self) self->control_sock[0]
#define SEND_COMMAND(self, command) \
G_STMT_START { \
unsigned char c; c = command; \
write (WRITE_SOCKET(self), &c, 1); \
} G_STMT_END
#define READ_COMMAND(self, command, res) \
G_STMT_START { \
res = read(READ_SOCKET(self), &command, 1); \
} G_STMT_END
#define DEFAULT_ADDRESS "127.0.0.1"
#define DEFAULT_PORT 5637
#define DEFAULT_WINDOW_SIZE 32
#define DEFAULT_TIMEOUT GST_SECOND
enum
{
PROP_0,
PROP_ADDRESS,
PROP_PORT,
PROP_WINDOW_SIZE,
PROP_TIMEOUT
};
#define _do_init(type) \
GST_DEBUG_CATEGORY_INIT (ncc_debug, "netclock", 0, "Network client clock");
GST_BOILERPLATE_FULL (GstNetClientClock, gst_net_client_clock,
GstSystemClock, GST_TYPE_SYSTEM_CLOCK, _do_init);
static void gst_net_client_clock_finalize (GObject * object);
static void gst_net_client_clock_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_net_client_clock_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_net_client_clock_stop (GstNetClientClock * self);
static void
gst_net_client_clock_base_init (gpointer g_class)
{
/* nop */
}
static void
gst_net_client_clock_class_init (GstNetClientClockClass * klass)
{
GObjectClass *gobject_class;
gobject_class = (GObjectClass *) klass;
gobject_class->finalize = gst_net_client_clock_finalize;
gobject_class->get_property = gst_net_client_clock_get_property;
gobject_class->set_property = gst_net_client_clock_set_property;
g_object_class_install_property (gobject_class, PROP_ADDRESS,
g_param_spec_string ("address", "address",
"The address of the machine providing a time server, "
"as a dotted quad (x.x.x.x)", DEFAULT_ADDRESS, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PORT,
g_param_spec_int ("port", "port",
"The port on which the remote server is listenind", 0, 32768,
DEFAULT_PORT, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_WINDOW_SIZE,
g_param_spec_int ("window-size", "Window size",
"The size of the window used to calculate rate and offset", 2, 1024,
DEFAULT_WINDOW_SIZE, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TIMEOUT,
g_param_spec_uint64 ("timeout", "Timeout",
"The amount of time, in nanoseconds, to wait for replies", 0,
G_MAXUINT64, DEFAULT_TIMEOUT, G_PARAM_READWRITE));
}
static void
gst_net_client_clock_init (GstNetClientClock * self,
GstNetClientClockClass * g_class)
{
self->port = DEFAULT_PORT;
self->address = g_strdup (DEFAULT_ADDRESS);
self->window_size = DEFAULT_WINDOW_SIZE;
self->timeout = DEFAULT_TIMEOUT;
self->sock = -1;
self->thread = NULL;
self->filling = TRUE;
self->time_index = 0;
self->local_times = g_new0 (GstClockTime, self->window_size);
self->remote_times = g_new0 (GstClockTime, self->window_size);
self->servaddr = NULL;
READ_SOCKET (self) = -1;
WRITE_SOCKET (self) = -1;
}
static void
gst_net_client_clock_finalize (GObject * object)
{
GstNetClientClock *self = GST_NET_CLIENT_CLOCK (object);
if (self->thread) {
gst_net_client_clock_stop (self);
g_assert (self->thread == NULL);
}
if (READ_SOCKET (self) != -1) {
close (READ_SOCKET (self));
close (WRITE_SOCKET (self));
READ_SOCKET (self) = -1;
WRITE_SOCKET (self) = -1;
}
g_free (self->address);
self->address = NULL;
g_free (self->servaddr);
self->servaddr = NULL;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_net_client_clock_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstNetClientClock *self = GST_NET_CLIENT_CLOCK (object);
switch (prop_id) {
case PROP_ADDRESS:
g_free (self->address);
if (g_value_get_string (value) == NULL)
self->address = g_strdup (DEFAULT_ADDRESS);
else
self->address = g_strdup (g_value_get_string (value));
break;
case PROP_PORT:
self->port = g_value_get_int (value);
break;
case PROP_WINDOW_SIZE:
self->window_size = g_value_get_int (value);
break;
case PROP_TIMEOUT:
self->timeout = g_value_get_uint64 (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_net_client_clock_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstNetClientClock *self = GST_NET_CLIENT_CLOCK (object);
switch (prop_id) {
case PROP_ADDRESS:
g_value_set_string (value, self->address);
break;
case PROP_PORT:
g_value_set_int (value, self->port);
break;
case PROP_WINDOW_SIZE:
g_value_set_int (value, self->window_size);
break;
case PROP_TIMEOUT:
g_value_set_uint64 (value, self->timeout);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* http://mathworld.wolfram.com/LeastSquaresFitting.html */
static void
do_linear_regression (GstClockTime * x, GstClockTime * y, gint n, gdouble * m,
gdouble * b, gdouble * r_squared)
{
gdouble sxx, syy, sxy, xbar, ybar;
gint i;
/* we lose precision with the doubles, but there's no other way except to use
~80 bit arithmetic */
for (i = 0; i < n; i++) {
xbar += x[i];
ybar += y[i];
}
xbar /= n;
ybar /= n;
for (i = 0; i < n; i++) {
sxx += ((double) x[i]) * x[i];
syy += ((double) y[i]) * y[i];
sxy += ((double) x[i]) * y[i];
}
sxx -= ((double) n) * xbar * xbar;
syy -= ((double) n) * ybar * ybar;
sxy -= ((double) n) * xbar * ybar;
*m = sxy / sxx;
*b = ybar - xbar * *m;
*r_squared = (sxy * sxy) / (sxx * syy);
}
static void
gst_net_client_clock_observe_times (GstNetClientClock * self,
GstClockTime local_1, GstClockTime remote, GstClockTime local_2)
{
GstClockTime local_avg;
gdouble m, b, r_squared;
if (local_2 < local_1)
goto bogus_observation;
local_avg = (local_2 - local_1) / 2;
self->local_times[self->time_index] = local_avg;
self->remote_times[self->time_index] = remote;
self->time_index++;
if (self->time_index == self->window_size) {
self->filling = FALSE;
self->time_index = 0;
}
if (!self->filling || self->time_index >= 4) {
/* need to allow tuning of the "4" parameter -- means that we need 4 samples
* before beginning to adjust the clock */
do_linear_regression (self->local_times, self->remote_times,
self->filling ? self->time_index : self->window_size, &m, &b,
&r_squared);
GST_LOG_OBJECT (self, "adjusting clock to m=%g, b=%g (rsquared=%g)", m, b,
r_squared);
gst_clock_set_rate_offset (GST_CLOCK (self), m, b);
}
if (self->filling) {
self->current_timeout = 0;
} else {
/* geto formula */
self->current_timeout =
(1e-3 / (1 - MIN (r_squared, 0.99999))) * GST_SECOND;
self->current_timeout = MIN (self->current_timeout, self->timeout);
}
return;
bogus_observation:
{
GST_WARNING_OBJECT (self, "time packet receive time < send time (%",
GST_TIME_FORMAT, " < %" GST_TIME_FORMAT ")", GST_TIME_ARGS (local_1),
GST_TIME_ARGS (local_2));
return;
}
}
static gint
gst_net_client_clock_do_select (GstNetClientClock * self, fd_set * readfds)
{
guint max_sock;
gint ret;
while (TRUE) {
FD_ZERO (readfds);
FD_SET (self->sock, readfds);
FD_SET (READ_SOCKET (self), readfds);
max_sock = MAX (self->sock, READ_SOCKET (self));
GST_LOG_OBJECT (self, "doing select");
{
GstClockTime diff;
GTimeVal tv;
diff = gst_clock_get_internal_time (GST_CLOCK (self));
GST_TIME_TO_TIMEVAL (self->current_timeout, tv);
ret = select (max_sock + 1, readfds, NULL, NULL, (struct timeval *) &tv);
diff = gst_clock_get_internal_time (GST_CLOCK (self)) - diff;
if (diff > self->current_timeout)
self->current_timeout = 0;
else
self->current_timeout -= diff;
}
GST_LOG_OBJECT (self, "select returned %d", ret);
if (ret < 0) {
if (errno != EAGAIN && errno != EINTR)
goto select_error;
else
continue;
} else {
return ret;
}
g_assert_not_reached ();
/* log errors and keep going */
select_error:
{
GST_WARNING_OBJECT (self, "select error %d: %s (%d)", ret,
g_strerror (errno), errno);
continue;
}
}
g_assert_not_reached ();
return -1;
}
static gpointer
gst_net_client_clock_thread (gpointer data)
{
GstNetClientClock *self = data;
struct sockaddr_in tmpaddr;
socklen_t len;
fd_set read_fds;
GstNetTimePacket *packet;
gint ret;
while (TRUE) {
ret = gst_net_client_clock_do_select (self, &read_fds);
if (FD_ISSET (READ_SOCKET (self), &read_fds)) {
/* got control message */
while (TRUE) {
gchar command;
int res;
READ_COMMAND (self, command, res);
if (res < 0) {
GST_LOG_OBJECT (self, "no more commands");
break;
}
switch (command) {
case CONTROL_STOP:
/* break out of the select loop */
GST_LOG_OBJECT (self, "stop");
goto stopped;
default:
GST_WARNING_OBJECT (self, "unknown message: '%c'", command);
g_warning ("netclientclock: unknown control message received");
continue;
}
g_assert_not_reached ();
}
continue;
} else if (ret == 0) {
/* timed out, let's send another packet */
packet = gst_net_time_packet_new (NULL);
packet->local_time = gst_clock_get_internal_time (GST_CLOCK (self));
gst_net_time_packet_send (packet, self->sock,
(struct sockaddr *) self->servaddr, sizeof (struct sockaddr_in));
g_free (packet);
/* reset timeout */
self->current_timeout = self->timeout;
} else if (FD_ISSET (READ_SOCKET (self), &read_fds)) {
/* got data in */
GstClockTime new_local = gst_clock_get_internal_time (GST_CLOCK (self));
len = sizeof (struct sockaddr);
packet = gst_net_time_packet_receive (self->sock,
(struct sockaddr *) &tmpaddr, &len);
if (!packet)
goto receive_error;
/* observe_times will reset the timeout */
gst_net_client_clock_observe_times (self, packet->local_time,
packet->remote_time, new_local);
g_free (packet);
continue;
} else {
GST_WARNING_OBJECT (self, "unhandled select return state?");
continue;
}
g_assert_not_reached ();
stopped:
{
GST_DEBUG_OBJECT (self, "shutting down");
/* close socket */
return NULL;
}
receive_error:
{
GST_WARNING_OBJECT (self, "receive error");
continue;
}
g_assert_not_reached ();
}
g_assert_not_reached ();
return NULL;
}
static gboolean
gst_net_client_clock_start (GstNetClientClock * self)
{
struct sockaddr_in servaddr, myaddr;
socklen_t len;
gint ret;
GError *error;
g_return_val_if_fail (self->address != NULL, FALSE);
g_return_val_if_fail (self->servaddr == NULL, FALSE);
if ((ret = socket (AF_INET, SOCK_DGRAM, 0)) < 0)
goto no_socket;
self->sock = ret;
len = sizeof (myaddr);
ret = getsockname (self->sock, (struct sockaddr *) &myaddr, &len);
if (ret < 0)
goto getsockname_error;
GST_DEBUG_OBJECT (self, "socket opened on UDP port %hd",
ntohs (servaddr.sin_port));
memset (&servaddr, 0, sizeof (servaddr));
servaddr.sin_family = AF_INET; /* host byte order */
servaddr.sin_port = htons (self->port); /* short, network byte order */
if (!inet_aton (self->address, &servaddr.sin_addr))
goto bad_address;
self->servaddr = g_malloc (sizeof (struct sockaddr_in));
memcpy (self->servaddr, &servaddr, sizeof (servaddr));
GST_DEBUG_OBJECT (self, "will communicate with %s:%d", self->address,
self->port);
self->thread = g_thread_create (gst_net_client_clock_thread, self, TRUE,
&error);
if (!self->thread)
goto no_thread;
return TRUE;
/* ERRORS */
no_socket:
{
GST_ERROR_OBJECT (self, "socket failed %d: %s (%d)", ret,
g_strerror (errno), errno);
return FALSE;
}
getsockname_error:
{
GST_ERROR_OBJECT (self, "getsockname failed %d: %s (%d)", ret,
g_strerror (errno), errno);
close (self->sock);
self->sock = -1;
return FALSE;
}
bad_address:
{
GST_ERROR_OBJECT (self, "inet_aton failed %d: %s (%d)", ret,
g_strerror (errno), errno);
close (self->sock);
self->sock = -1;
return FALSE;
}
no_thread:
{
GST_ERROR_OBJECT (self, "could not create thread: %s", error->message);
close (self->sock);
self->sock = -1;
g_free (self->servaddr);
self->servaddr = NULL;
g_error_free (error);
return FALSE;
}
}
static void
gst_net_client_clock_stop (GstNetClientClock * self)
{
SEND_COMMAND (self, CONTROL_STOP);
g_thread_join (self->thread);
self->thread = NULL;
if (self->sock != -1) {
close (self->sock);
self->sock = -1;
}
}
GstClock *
gst_net_client_clock_new (gchar * name, const gchar * remote_address,
gint remote_port, GstClockTime base_time)
{
GstNetClientClock *ret;
gint iret;
g_return_val_if_fail (remote_address != NULL, NULL);
g_return_val_if_fail (remote_port > 0, NULL);
g_return_val_if_fail (remote_port < 32768, NULL);
g_return_val_if_fail (base_time != GST_CLOCK_TIME_NONE, NULL);
ret = g_object_new (GST_TYPE_NET_CLIENT_CLOCK, "address", remote_address,
"port", remote_port, NULL);
GST_DEBUG_OBJECT (ret, "creating socket pair");
if ((iret = socketpair (PF_UNIX, SOCK_STREAM, 0, CONTROL_SOCKETS (ret))) < 0)
goto no_socket_pair;
fcntl (READ_SOCKET (ret), F_SETFL, O_NONBLOCK);
fcntl (WRITE_SOCKET (ret), F_SETFL, O_NONBLOCK);
if (!gst_net_client_clock_start (ret))
goto failed_start;
/* all systems go, cap'n */
return (GstClock *) ret;
no_socket_pair:
{
GST_ERROR_OBJECT (ret, "no socket pair %d: %s (%d)", iret,
g_strerror (errno), errno);
gst_object_unref (ret);
return NULL;
}
failed_start:
{
/* already printed a nice error */
gst_object_unref (ret);
return NULL;
}
}

99
gst/net/gstnetclientclock.h Normal file
View file

@ -0,0 +1,99 @@
/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2005 Wim Taymans <wim@fluendo.com>
* 2005 Andy Wingo <wingo@pobox.com>
*
* gstnetclientclock.h: clock that synchronizes itself to a time provider over
* the network
*
* 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.
*/
#ifndef __GST_NET_CLIENT_CLOCK_H__
#define __GST_NET_CLIENT_CLOCK_H__
#include <gst/gst.h>
#include <gst/gstsystemclock.h>
G_BEGIN_DECLS
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <fcntl.h>
#define GST_TYPE_NET_CLIENT_CLOCK \
(gst_net_client_clock_get_type())
#define GST_NET_CLIENT_CLOCK(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_NET_CLIENT_CLOCK,GstNetClientClock))
#define GST_NET_CLIENT_CLOCK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_NET_CLIENT_CLOCK,GstNetClientClockClass))
#define GST_IS_NET_CLIENT_CLOCK(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_NET_CLIENT_CLOCK))
#define GST_IS_NET_CLIENT_CLOCK_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_NET_CLIENT_CLOCK))
typedef struct _GstNetClientClock GstNetClientClock;
typedef struct _GstNetClientClockClass GstNetClientClockClass;
struct _GstNetClientClock {
GstSystemClock clock;
/*< protected >*/
gchar *address;
gint port;
gint window_size;
GstClockTime timeout;
/*< private >*/
int sock;
int control_sock[2];
GstClockTime current_timeout;
gboolean filling;
gint time_index;
GstClockTime *local_times;
GstClockTime *remote_times;
struct sockaddr_id *servaddr;
GThread *thread;
gpointer _gst_reserved[GST_PADDING];
};
struct _GstNetClientClockClass {
GstSystemClockClass parent_class;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
GType gst_net_client_clock_get_type (void);
GstClock* gst_net_client_clock_new (gchar *name, const gchar *remote_address,
gint remote_port, GstClockTime base_time);
G_END_DECLS
#endif /* __GST_NET_CLIENT_CLOCK_H__ */

2
libs/gst/net/Makefile.am
View file

@ -5,10 +5,12 @@ lib_LTLIBRARIES = libgstnet-tempname-@GST_MAJORMINOR@.la
libgstnet_tempname_@GST_MAJORMINOR@_includedir = $(includedir)/gstreamer-@GST_MAJORMINOR@/gst/net
libgstnet_tempname_@GST_MAJORMINOR@_include_HEADERS = \
gstnet.h \
gstnetclientclock.h \
gstnettimepacket.h \
gstnettimeprovider.h
libgstnet_tempname_@GST_MAJORMINOR@_la_SOURCES = \
gstnetclientclock.c \
gstnettimepacket.c \
gstnettimeprovider.c

1
libs/gst/net/gstnet.h
View file

@ -22,6 +22,7 @@
#define __GST_NET_H__
#include <gst/net/gstnetclientclock.h>
#include <gst/net/gstnettimepacket.h>
#include <gst/net/gstnettimeprovider.h>

592
libs/gst/net/gstnetclientclock.c Normal file
View file

@ -0,0 +1,592 @@
/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2005 Wim Taymans <wim@fluendo.com>
* 2005 Andy Wingo <wingo@pobox.com>
*
* gstnetclientclock.h: clock that synchronizes itself to a time provider over
* the network
*
* 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 <unistd.h>
#include "gstnettimepacket.h"
#include "gstnetclientclock.h"
GST_DEBUG_CATEGORY (ncc_debug);
#define GST_CAT_DEFAULT (ncc_debug)
/* the select call is also performed on the control sockets, that way
* we can send special commands to unblock or restart the select call */
#define CONTROL_RESTART 'R' /* restart the select call */
#define CONTROL_STOP 'S' /* stop the select call */
#define CONTROL_SOCKETS(self) self->control_sock
#define WRITE_SOCKET(self) self->control_sock[1]
#define READ_SOCKET(self) self->control_sock[0]
#define SEND_COMMAND(self, command) \
G_STMT_START { \
unsigned char c; c = command; \
write (WRITE_SOCKET(self), &c, 1); \
} G_STMT_END
#define READ_COMMAND(self, command, res) \
G_STMT_START { \
res = read(READ_SOCKET(self), &command, 1); \
} G_STMT_END
#define DEFAULT_ADDRESS "127.0.0.1"
#define DEFAULT_PORT 5637
#define DEFAULT_WINDOW_SIZE 32
#define DEFAULT_TIMEOUT GST_SECOND
enum
{
PROP_0,
PROP_ADDRESS,
PROP_PORT,
PROP_WINDOW_SIZE,
PROP_TIMEOUT
};
#define _do_init(type) \
GST_DEBUG_CATEGORY_INIT (ncc_debug, "netclock", 0, "Network client clock");
GST_BOILERPLATE_FULL (GstNetClientClock, gst_net_client_clock,
GstSystemClock, GST_TYPE_SYSTEM_CLOCK, _do_init);
static void gst_net_client_clock_finalize (GObject * object);
static void gst_net_client_clock_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_net_client_clock_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_net_client_clock_stop (GstNetClientClock * self);
static void
gst_net_client_clock_base_init (gpointer g_class)
{
/* nop */
}
static void
gst_net_client_clock_class_init (GstNetClientClockClass * klass)
{
GObjectClass *gobject_class;
gobject_class = (GObjectClass *) klass;
gobject_class->finalize = gst_net_client_clock_finalize;
gobject_class->get_property = gst_net_client_clock_get_property;
gobject_class->set_property = gst_net_client_clock_set_property;
g_object_class_install_property (gobject_class, PROP_ADDRESS,
g_param_spec_string ("address", "address",
"The address of the machine providing a time server, "
"as a dotted quad (x.x.x.x)", DEFAULT_ADDRESS, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PORT,
g_param_spec_int ("port", "port",
"The port on which the remote server is listenind", 0, 32768,
DEFAULT_PORT, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_WINDOW_SIZE,
g_param_spec_int ("window-size", "Window size",
"The size of the window used to calculate rate and offset", 2, 1024,
DEFAULT_WINDOW_SIZE, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TIMEOUT,
g_param_spec_uint64 ("timeout", "Timeout",
"The amount of time, in nanoseconds, to wait for replies", 0,
G_MAXUINT64, DEFAULT_TIMEOUT, G_PARAM_READWRITE));
}
static void
gst_net_client_clock_init (GstNetClientClock * self,
GstNetClientClockClass * g_class)
{
self->port = DEFAULT_PORT;
self->address = g_strdup (DEFAULT_ADDRESS);
self->window_size = DEFAULT_WINDOW_SIZE;
self->timeout = DEFAULT_TIMEOUT;
self->sock = -1;
self->thread = NULL;
self->filling = TRUE;
self->time_index = 0;
self->local_times = g_new0 (GstClockTime, self->window_size);
self->remote_times = g_new0 (GstClockTime, self->window_size);
self->servaddr = NULL;
READ_SOCKET (self) = -1;
WRITE_SOCKET (self) = -1;
}
static void
gst_net_client_clock_finalize (GObject * object)
{
GstNetClientClock *self = GST_NET_CLIENT_CLOCK (object);
if (self->thread) {
gst_net_client_clock_stop (self);
g_assert (self->thread == NULL);
}
if (READ_SOCKET (self) != -1) {
close (READ_SOCKET (self));
close (WRITE_SOCKET (self));
READ_SOCKET (self) = -1;
WRITE_SOCKET (self) = -1;
}
g_free (self->address);
self->address = NULL;
g_free (self->servaddr);
self->servaddr = NULL;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_net_client_clock_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstNetClientClock *self = GST_NET_CLIENT_CLOCK (object);
switch (prop_id) {
case PROP_ADDRESS:
g_free (self->address);
if (g_value_get_string (value) == NULL)
self->address = g_strdup (DEFAULT_ADDRESS);
else
self->address = g_strdup (g_value_get_string (value));
break;
case PROP_PORT:
self->port = g_value_get_int (value);
break;
case PROP_WINDOW_SIZE:
self->window_size = g_value_get_int (value);
break;
case PROP_TIMEOUT:
self->timeout = g_value_get_uint64 (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_net_client_clock_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstNetClientClock *self = GST_NET_CLIENT_CLOCK (object);
switch (prop_id) {
case PROP_ADDRESS:
g_value_set_string (value, self->address);
break;
case PROP_PORT:
g_value_set_int (value, self->port);
break;
case PROP_WINDOW_SIZE:
g_value_set_int (value, self->window_size);
break;
case PROP_TIMEOUT:
g_value_set_uint64 (value, self->timeout);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* http://mathworld.wolfram.com/LeastSquaresFitting.html */
static void
do_linear_regression (GstClockTime * x, GstClockTime * y, gint n, gdouble * m,
gdouble * b, gdouble * r_squared)
{
gdouble sxx, syy, sxy, xbar, ybar;
gint i;
/* we lose precision with the doubles, but there's no other way except to use
~80 bit arithmetic */
for (i = 0; i < n; i++) {
xbar += x[i];
ybar += y[i];
}
xbar /= n;
ybar /= n;
for (i = 0; i < n; i++) {
sxx += ((double) x[i]) * x[i];
syy += ((double) y[i]) * y[i];
sxy += ((double) x[i]) * y[i];
}
sxx -= ((double) n) * xbar * xbar;
syy -= ((double) n) * ybar * ybar;
sxy -= ((double) n) * xbar * ybar;
*m = sxy / sxx;
*b = ybar - xbar * *m;
*r_squared = (sxy * sxy) / (sxx * syy);
}
static void
gst_net_client_clock_observe_times (GstNetClientClock * self,
GstClockTime local_1, GstClockTime remote, GstClockTime local_2)
{
GstClockTime local_avg;
gdouble m, b, r_squared;
if (local_2 < local_1)
goto bogus_observation;
local_avg = (local_2 - local_1) / 2;
self->local_times[self->time_index] = local_avg;
self->remote_times[self->time_index] = remote;
self->time_index++;
if (self->time_index == self->window_size) {
self->filling = FALSE;
self->time_index = 0;
}
if (!self->filling || self->time_index >= 4) {
/* need to allow tuning of the "4" parameter -- means that we need 4 samples
* before beginning to adjust the clock */
do_linear_regression (self->local_times, self->remote_times,
self->filling ? self->time_index : self->window_size, &m, &b,
&r_squared);
GST_LOG_OBJECT (self, "adjusting clock to m=%g, b=%g (rsquared=%g)", m, b,
r_squared);
gst_clock_set_rate_offset (GST_CLOCK (self), m, b);
}
if (self->filling) {
self->current_timeout = 0;
} else {
/* geto formula */
self->current_timeout =
(1e-3 / (1 - MIN (r_squared, 0.99999))) * GST_SECOND;
self->current_timeout = MIN (self->current_timeout, self->timeout);
}
return;
bogus_observation:
{
GST_WARNING_OBJECT (self, "time packet receive time < send time (%",
GST_TIME_FORMAT, " < %" GST_TIME_FORMAT ")", GST_TIME_ARGS (local_1),
GST_TIME_ARGS (local_2));
return;
}
}
static gint
gst_net_client_clock_do_select (GstNetClientClock * self, fd_set * readfds)
{
guint max_sock;
gint ret;
while (TRUE) {
FD_ZERO (readfds);
FD_SET (self->sock, readfds);
FD_SET (READ_SOCKET (self), readfds);
max_sock = MAX (self->sock, READ_SOCKET (self));
GST_LOG_OBJECT (self, "doing select");
{
GstClockTime diff;
GTimeVal tv;
diff = gst_clock_get_internal_time (GST_CLOCK (self));
GST_TIME_TO_TIMEVAL (self->current_timeout, tv);
ret = select (max_sock + 1, readfds, NULL, NULL, (struct timeval *) &tv);
diff = gst_clock_get_internal_time (GST_CLOCK (self)) - diff;
if (diff > self->current_timeout)
self->current_timeout = 0;
else
self->current_timeout -= diff;
}
GST_LOG_OBJECT (self, "select returned %d", ret);
if (ret < 0) {
if (errno != EAGAIN && errno != EINTR)
goto select_error;
else
continue;
} else {
return ret;
}
g_assert_not_reached ();
/* log errors and keep going */
select_error:
{
GST_WARNING_OBJECT (self, "select error %d: %s (%d)", ret,
g_strerror (errno), errno);
continue;
}
}
g_assert_not_reached ();
return -1;
}
static gpointer
gst_net_client_clock_thread (gpointer data)
{
GstNetClientClock *self = data;
struct sockaddr_in tmpaddr;
socklen_t len;
fd_set read_fds;
GstNetTimePacket *packet;
gint ret;
while (TRUE) {
ret = gst_net_client_clock_do_select (self, &read_fds);
if (FD_ISSET (READ_SOCKET (self), &read_fds)) {
/* got control message */
while (TRUE) {
gchar command;
int res;
READ_COMMAND (self, command, res);
if (res < 0) {
GST_LOG_OBJECT (self, "no more commands");
break;
}
switch (command) {
case CONTROL_STOP:
/* break out of the select loop */
GST_LOG_OBJECT (self, "stop");
goto stopped;
default:
GST_WARNING_OBJECT (self, "unknown message: '%c'", command);
g_warning ("netclientclock: unknown control message received");
continue;
}
g_assert_not_reached ();
}
continue;
} else if (ret == 0) {
/* timed out, let's send another packet */
packet = gst_net_time_packet_new (NULL);
packet->local_time = gst_clock_get_internal_time (GST_CLOCK (self));
gst_net_time_packet_send (packet, self->sock,
(struct sockaddr *) self->servaddr, sizeof (struct sockaddr_in));
g_free (packet);
/* reset timeout */
self->current_timeout = self->timeout;
} else if (FD_ISSET (READ_SOCKET (self), &read_fds)) {
/* got data in */
GstClockTime new_local = gst_clock_get_internal_time (GST_CLOCK (self));
len = sizeof (struct sockaddr);
packet = gst_net_time_packet_receive (self->sock,
(struct sockaddr *) &tmpaddr, &len);
if (!packet)
goto receive_error;
/* observe_times will reset the timeout */
gst_net_client_clock_observe_times (self, packet->local_time,
packet->remote_time, new_local);
g_free (packet);
continue;
} else {
GST_WARNING_OBJECT (self, "unhandled select return state?");
continue;
}
g_assert_not_reached ();
stopped:
{
GST_DEBUG_OBJECT (self, "shutting down");
/* close socket */
return NULL;
}
receive_error:
{
GST_WARNING_OBJECT (self, "receive error");
continue;
}
g_assert_not_reached ();
}
g_assert_not_reached ();
return NULL;
}
static gboolean
gst_net_client_clock_start (GstNetClientClock * self)
{
struct sockaddr_in servaddr, myaddr;
socklen_t len;
gint ret;
GError *error;
g_return_val_if_fail (self->address != NULL, FALSE);
g_return_val_if_fail (self->servaddr == NULL, FALSE);
if ((ret = socket (AF_INET, SOCK_DGRAM, 0)) < 0)
goto no_socket;
self->sock = ret;
len = sizeof (myaddr);
ret = getsockname (self->sock, (struct sockaddr *) &myaddr, &len);
if (ret < 0)
goto getsockname_error;
GST_DEBUG_OBJECT (self, "socket opened on UDP port %hd",
ntohs (servaddr.sin_port));
memset (&servaddr, 0, sizeof (servaddr));
servaddr.sin_family = AF_INET; /* host byte order */
servaddr.sin_port = htons (self->port); /* short, network byte order */
if (!inet_aton (self->address, &servaddr.sin_addr))
goto bad_address;
self->servaddr = g_malloc (sizeof (struct sockaddr_in));
memcpy (self->servaddr, &servaddr, sizeof (servaddr));
GST_DEBUG_OBJECT (self, "will communicate with %s:%d", self->address,
self->port);
self->thread = g_thread_create (gst_net_client_clock_thread, self, TRUE,
&error);
if (!self->thread)
goto no_thread;
return TRUE;
/* ERRORS */
no_socket:
{
GST_ERROR_OBJECT (self, "socket failed %d: %s (%d)", ret,
g_strerror (errno), errno);
return FALSE;
}
getsockname_error:
{
GST_ERROR_OBJECT (self, "getsockname failed %d: %s (%d)", ret,
g_strerror (errno), errno);
close (self->sock);
self->sock = -1;
return FALSE;
}
bad_address:
{
GST_ERROR_OBJECT (self, "inet_aton failed %d: %s (%d)", ret,
g_strerror (errno), errno);
close (self->sock);
self->sock = -1;
return FALSE;
}
no_thread:
{
GST_ERROR_OBJECT (self, "could not create thread: %s", error->message);
close (self->sock);
self->sock = -1;
g_free (self->servaddr);
self->servaddr = NULL;
g_error_free (error);
return FALSE;
}
}
static void
gst_net_client_clock_stop (GstNetClientClock * self)
{
SEND_COMMAND (self, CONTROL_STOP);
g_thread_join (self->thread);
self->thread = NULL;
if (self->sock != -1) {
close (self->sock);
self->sock = -1;
}
}
GstClock *
gst_net_client_clock_new (gchar * name, const gchar * remote_address,
gint remote_port, GstClockTime base_time)
{
GstNetClientClock *ret;
gint iret;
g_return_val_if_fail (remote_address != NULL, NULL);
g_return_val_if_fail (remote_port > 0, NULL);
g_return_val_if_fail (remote_port < 32768, NULL);
g_return_val_if_fail (base_time != GST_CLOCK_TIME_NONE, NULL);
ret = g_object_new (GST_TYPE_NET_CLIENT_CLOCK, "address", remote_address,
"port", remote_port, NULL);
GST_DEBUG_OBJECT (ret, "creating socket pair");
if ((iret = socketpair (PF_UNIX, SOCK_STREAM, 0, CONTROL_SOCKETS (ret))) < 0)
goto no_socket_pair;
fcntl (READ_SOCKET (ret), F_SETFL, O_NONBLOCK);
fcntl (WRITE_SOCKET (ret), F_SETFL, O_NONBLOCK);
if (!gst_net_client_clock_start (ret))
goto failed_start;
/* all systems go, cap'n */
return (GstClock *) ret;
no_socket_pair:
{
GST_ERROR_OBJECT (ret, "no socket pair %d: %s (%d)", iret,
g_strerror (errno), errno);
gst_object_unref (ret);
return NULL;
}
failed_start:
{
/* already printed a nice error */
gst_object_unref (ret);
return NULL;
}
}

99
libs/gst/net/gstnetclientclock.h Normal file
View file

@ -0,0 +1,99 @@
/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2005 Wim Taymans <wim@fluendo.com>
* 2005 Andy Wingo <wingo@pobox.com>
*
* gstnetclientclock.h: clock that synchronizes itself to a time provider over
* the network
*
* 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.
*/
#ifndef __GST_NET_CLIENT_CLOCK_H__
#define __GST_NET_CLIENT_CLOCK_H__
#include <gst/gst.h>
#include <gst/gstsystemclock.h>
G_BEGIN_DECLS
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <fcntl.h>
#define GST_TYPE_NET_CLIENT_CLOCK \
(gst_net_client_clock_get_type())
#define GST_NET_CLIENT_CLOCK(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_NET_CLIENT_CLOCK,GstNetClientClock))
#define GST_NET_CLIENT_CLOCK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_NET_CLIENT_CLOCK,GstNetClientClockClass))
#define GST_IS_NET_CLIENT_CLOCK(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_NET_CLIENT_CLOCK))
#define GST_IS_NET_CLIENT_CLOCK_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_NET_CLIENT_CLOCK))
typedef struct _GstNetClientClock GstNetClientClock;
typedef struct _GstNetClientClockClass GstNetClientClockClass;
struct _GstNetClientClock {
GstSystemClock clock;
/*< protected >*/
gchar *address;
gint port;
gint window_size;
GstClockTime timeout;
/*< private >*/
int sock;
int control_sock[2];
GstClockTime current_timeout;
gboolean filling;
gint time_index;
GstClockTime *local_times;
GstClockTime *remote_times;
struct sockaddr_id *servaddr;
GThread *thread;
gpointer _gst_reserved[GST_PADDING];
};
struct _GstNetClientClockClass {
GstSystemClockClass parent_class;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
GType gst_net_client_clock_get_type (void);
GstClock* gst_net_client_clock_new (gchar *name, const gchar *remote_address,
gint remote_port, GstClockTime base_time);
G_END_DECLS
#endif /* __GST_NET_CLIENT_CLOCK_H__ */

4
tests/check/Makefile.am
View file

@ -57,6 +57,7 @@ check_PROGRAMS = \
states/sinks \
gst-libs/controller \
gst-libs/gdp \
net/gstnetclientclock \
net/gstnettimeprovider
TESTS = $(check_PROGRAMS)
@ -79,6 +80,9 @@ gst_libs_controller_LDADD = \
$(top_builddir)/libs/gst/controller/libgstcontroller-@GST_MAJORMINOR@.la \
$(LDADD)
net_gstnetclientclock_LDADD = \
$(top_builddir)/gst/net/libgstnet-tempname-@GST_MAJORMINOR@.la \
$(LDADD)
net_gstnettimeprovider_LDADD = \
$(top_builddir)/gst/net/libgstnet-tempname-@GST_MAJORMINOR@.la \
$(LDADD)

137
tests/check/libs/gstnetclientclock.c Normal file
View file

@ -0,0 +1,137 @@
/* GStreamer
* Copyright (C) 2005 Andy Wingo <wingo@pobox.com>
*
* gstnetclientclock.c: Unit test for the network client clock
*
* 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 <gst/check/gstcheck.h>
#include <gst/net/gstnet.h>
#include <unistd.h>
GST_START_TEST (test_instantiation)
{
GstClock *client, *local;
local = gst_system_clock_obtain ();
client = gst_net_client_clock_new (NULL, "127.0.0.1", 1234, GST_SECOND);
fail_unless (local != NULL, "failed to get system clock");
fail_unless (client != NULL, "failed to get network client clock");
/* one for gstreamer, one for us */
ASSERT_OBJECT_REFCOUNT (local, "system clock", 2);
ASSERT_OBJECT_REFCOUNT (client, "network client clock", 1);
gst_object_unref (client);
ASSERT_OBJECT_REFCOUNT (local, "net time provider", 2);
gst_object_unref (local);
}
GST_END_TEST;
#if 0
GST_START_TEST (test_functioning)
{
GstNetTimeProvider *ntp;
GstNetTimePacket *packet;
GstClock *clock;
GstClockTime local;
struct sockaddr_in servaddr;
gint port = -1, sockfd, ret;
socklen_t len;
clock = gst_system_clock_obtain ();
fail_unless (clock != NULL, "failed to get system clock");
ntp = gst_net_time_provider_new (clock, "127.0.0.1", -1);
fail_unless (ntp != NULL, "failed to create net time provider");
g_object_get (ntp, "port", &port, NULL);
fail_unless (port > 0);
sockfd = socket (AF_INET, SOCK_DGRAM, 0);
fail_if (sockfd < 0, "socket failed");
memset (&servaddr, 0, sizeof (servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons (port);
inet_aton ("127.0.0.1", &servaddr.sin_addr);
packet = gst_net_time_packet_new (NULL);
fail_unless (packet != NULL, "failed to create packet");
packet->local_time = local = gst_clock_get_time (clock);
len = sizeof (servaddr);
ret = gst_net_time_packet_send (packet, sockfd,
(struct sockaddr *) &servaddr, len);
fail_unless (ret == GST_NET_TIME_PACKET_SIZE, "failed to send packet");
g_free (packet);
packet = gst_net_time_packet_receive (sockfd, (struct sockaddr *) &servaddr,
&len);
fail_unless (packet != NULL, "failed to receive packet");
fail_unless (packet->local_time == local, "local time is not the same");
fail_unless (packet->remote_time > local, "remote time not after local time");
fail_unless (packet->remote_time < gst_clock_get_time (clock),
"remote time in the future");
g_free (packet);
close (sockfd);
gst_object_unref (ntp);
gst_object_unref (clock);
}
GST_END_TEST;
#endif
Suite *
gst_net_client_clock_suite (void)
{
Suite *s = suite_create ("GstNetClientClock");
TCase *tc_chain = tcase_create ("generic tests");
suite_add_tcase (s, tc_chain);
tcase_add_test (tc_chain, test_instantiation);
/* tcase_add_test (tc_chain, test_functioning); */
return s;
}
int
main (int argc, char **argv)
{
int nf;
Suite *s = gst_net_client_clock_suite ();
SRunner *sr = srunner_create (s);
gst_check_init (&argc, &argv);
srunner_run_all (sr, CK_NORMAL);
nf = srunner_ntests_failed (sr);
srunner_free (sr);
return nf;
}

2
tests/check/libs/gstnettimeprovider.c
View file

@ -74,7 +74,7 @@ GST_START_TEST (test_functioning)
memset (&servaddr, 0, sizeof (servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = port;
servaddr.sin_port = htons (port);
inet_aton ("127.0.0.1", &servaddr.sin_addr);
packet = gst_net_time_packet_new (NULL);

2
tests/misc/network-clock-utils.scm
View file

@ -164,7 +164,7 @@
(if (null? (q-tail q))
(make-q tail)
(let ((l (append! (q-head q) tail)))
(if (> (length (q-head q)) *queue-length*)
(if (> (length (q-head q)) *window-size*)
(make-q (cdr (q-head q)))
q)))))

4
tests/misc/network-clock.scm
View file

@ -125,7 +125,7 @@ exec guile --debug -l $0 -e main -- "$@"
(lambda (m b r-squared)
(define (next-time)
(max
(if (< (length (q-head x)) *queue-length*)
(if (< (length (q-head x)) *window-size*)
0
(/ 1 (- 1 (min r-squared 0.99999)) 1000))
0.10))
@ -188,7 +188,7 @@ exec guile --debug -l $0 -e main -- "$@"
(define-parameter *packet-loss* 0.01)
(define-parameter *send-jitter* 0.1)
(define-parameter *recv-jitter* 0.1)
(define-parameter *queue-length* 32)
(define-parameter *window-size* 32)
(define-parameter *local-rate* 1.0)
(define-parameter *remote-rate* 1.1)
(define-parameter *total-time* 5.0)

2
tests/network-clock-utils.scm
View file

@ -164,7 +164,7 @@
(if (null? (q-tail q))
(make-q tail)
(let ((l (append! (q-head q) tail)))
(if (> (length (q-head q)) *queue-length*)
(if (> (length (q-head q)) *window-size*)
(make-q (cdr (q-head q)))
q)))))

4
tests/network-clock.scm
View file

@ -125,7 +125,7 @@ exec guile --debug -l $0 -e main -- "$@"
(lambda (m b r-squared)
(define (next-time)
(max
(if (< (length (q-head x)) *queue-length*)
(if (< (length (q-head x)) *window-size*)
0
(/ 1 (- 1 (min r-squared 0.99999)) 1000))
0.10))
@ -188,7 +188,7 @@ exec guile --debug -l $0 -e main -- "$@"
(define-parameter *packet-loss* 0.01)
(define-parameter *send-jitter* 0.1)
(define-parameter *recv-jitter* 0.1)
(define-parameter *queue-length* 32)
(define-parameter *window-size* 32)
(define-parameter *local-rate* 1.0)
(define-parameter *remote-rate* 1.1)
(define-parameter *total-time* 5.0)