2 * Copyright (C) 2005 Andy Wingo <wingo@pobox.com>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
20 * SECTION:gstnettimeprovider
21 * @title: GstNetTimeProvider
22 * @short_description: Special object that exposed the time of a clock
24 * @see_also: #GstClock, #GstNetClientClock, #GstPipeline
26 * This object exposes the time of a #GstClock on the network.
28 * A #GstNetTimeProvider is created with gst_net_time_provider_new() which
29 * takes a #GstClock, an address and a port number as arguments.
31 * After creating the object, a client clock such as #GstNetClientClock can
32 * query the exposed clock over the network for its values.
34 * The #GstNetTimeProvider typically wraps the clock used by a #GstPipeline.
41 #include "gstnettimeprovider.h"
42 #include "gstnettimepacket.h"
44 GST_DEBUG_CATEGORY_STATIC (ntp_debug);
45 #define GST_CAT_DEFAULT (ntp_debug)
47 #define DEFAULT_ADDRESS "0.0.0.0"
48 #define DEFAULT_PORT 5637
50 #define IS_ACTIVE(self) (g_atomic_int_get (&((self)->priv->active)))
61 #define GST_NET_TIME_PROVIDER_GET_PRIVATE(obj) \
62 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_NET_TIME_PROVIDER, GstNetTimeProviderPrivate))
64 struct _GstNetTimeProviderPrivate
73 gboolean active; /* ATOMIC */
77 gboolean made_cancel_fd;
80 static void gst_net_time_provider_initable_iface_init (gpointer g_iface);
82 static gboolean gst_net_time_provider_start (GstNetTimeProvider * bself,
84 static void gst_net_time_provider_stop (GstNetTimeProvider * bself);
86 static gpointer gst_net_time_provider_thread (gpointer data);
88 static void gst_net_time_provider_finalize (GObject * object);
89 static void gst_net_time_provider_set_property (GObject * object, guint prop_id,
90 const GValue * value, GParamSpec * pspec);
91 static void gst_net_time_provider_get_property (GObject * object, guint prop_id,
92 GValue * value, GParamSpec * pspec);
95 GST_DEBUG_CATEGORY_INIT (ntp_debug, "nettime", 0, "Network time provider"); \
96 G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, gst_net_time_provider_initable_iface_init)
98 #define gst_net_time_provider_parent_class parent_class
99 G_DEFINE_TYPE_WITH_CODE (GstNetTimeProvider, gst_net_time_provider,
100 GST_TYPE_OBJECT, _do_init);
103 gst_net_time_provider_class_init (GstNetTimeProviderClass * klass)
105 GObjectClass *gobject_class;
107 gobject_class = G_OBJECT_CLASS (klass);
109 g_assert (sizeof (GstClockTime) == 8);
111 g_type_class_add_private (klass, sizeof (GstNetTimeProviderPrivate));
113 gobject_class->finalize = gst_net_time_provider_finalize;
114 gobject_class->set_property = gst_net_time_provider_set_property;
115 gobject_class->get_property = gst_net_time_provider_get_property;
117 g_object_class_install_property (gobject_class, PROP_PORT,
118 g_param_spec_int ("port", "port",
119 "The port to receive the packets from, 0=allocate", 0, G_MAXUINT16,
121 G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
122 g_object_class_install_property (gobject_class, PROP_ADDRESS,
123 g_param_spec_string ("address", "address",
124 "The address to bind on, as a dotted quad (x.x.x.x)", DEFAULT_ADDRESS,
125 G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
126 g_object_class_install_property (gobject_class, PROP_CLOCK,
127 g_param_spec_object ("clock", "Clock",
128 "The clock to export over the network", GST_TYPE_CLOCK,
129 G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
130 g_object_class_install_property (gobject_class, PROP_ACTIVE,
131 g_param_spec_boolean ("active", "Active",
132 "TRUE if the clock will respond to queries over the network", TRUE,
133 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
137 gst_net_time_provider_init (GstNetTimeProvider * self)
139 self->priv = GST_NET_TIME_PROVIDER_GET_PRIVATE (self);
141 self->priv->port = DEFAULT_PORT;
142 self->priv->address = g_strdup (DEFAULT_ADDRESS);
143 self->priv->thread = NULL;
144 self->priv->active = TRUE;
148 gst_net_time_provider_finalize (GObject * object)
150 GstNetTimeProvider *self = GST_NET_TIME_PROVIDER (object);
152 if (self->priv->thread) {
153 gst_net_time_provider_stop (self);
154 g_assert (self->priv->thread == NULL);
157 g_free (self->priv->address);
158 self->priv->address = NULL;
160 if (self->priv->clock)
161 gst_object_unref (self->priv->clock);
162 self->priv->clock = NULL;
164 G_OBJECT_CLASS (parent_class)->finalize (object);
168 gst_net_time_provider_thread (gpointer data)
170 GstNetTimeProvider *self = data;
171 GCancellable *cancel = self->priv->cancel;
172 GSocket *socket = self->priv->socket;
173 GstNetTimePacket *packet;
176 GST_INFO_OBJECT (self, "time provider thread is running");
179 GSocketAddress *sender_addr = NULL;
181 GST_LOG_OBJECT (self, "waiting on socket");
182 if (!g_socket_condition_wait (socket, G_IO_IN, cancel, &err)) {
183 GST_INFO_OBJECT (self, "socket error: %s", err->message);
185 if (err->code == G_IO_ERROR_CANCELLED)
189 g_usleep (G_USEC_PER_SEC / 10);
196 packet = gst_net_time_packet_receive (socket, &sender_addr, &err);
199 GST_DEBUG_OBJECT (self, "receive error: %s", err->message);
200 g_usleep (G_USEC_PER_SEC / 10);
206 if (IS_ACTIVE (self)) {
207 /* do what we were asked to and send the packet back */
208 packet->remote_time = gst_clock_get_time (self->priv->clock);
211 gst_net_time_packet_send (packet, socket, sender_addr, NULL);
212 g_object_unref (sender_addr);
219 GST_INFO_OBJECT (self, "time provider thread is stopping");
224 gst_net_time_provider_set_property (GObject * object, guint prop_id,
225 const GValue * value, GParamSpec * pspec)
227 GstNetTimeProvider *self = GST_NET_TIME_PROVIDER (object);
228 GstClock **clock_p = &self->priv->clock;
232 self->priv->port = g_value_get_int (value);
235 g_free (self->priv->address);
236 if (g_value_get_string (value) == NULL)
237 self->priv->address = g_strdup (DEFAULT_ADDRESS);
239 self->priv->address = g_strdup (g_value_get_string (value));
242 gst_object_replace ((GstObject **) clock_p,
243 (GstObject *) g_value_get_object (value));
246 g_atomic_int_set (&self->priv->active, g_value_get_boolean (value));
249 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
255 gst_net_time_provider_get_property (GObject * object, guint prop_id,
256 GValue * value, GParamSpec * pspec)
258 GstNetTimeProvider *self = GST_NET_TIME_PROVIDER (object);
262 g_value_set_int (value, self->priv->port);
265 g_value_set_string (value, self->priv->address);
268 g_value_set_object (value, self->priv->clock);
271 g_value_set_boolean (value, IS_ACTIVE (self));
274 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
280 gst_net_time_provider_start (GstNetTimeProvider * self, GError ** error)
282 GSocketAddress *socket_addr, *bound_addr;
283 GInetAddress *inet_addr;
284 GPollFD dummy_pollfd;
290 if (self->priv->address) {
291 inet_addr = g_inet_address_new_from_string (self->priv->address);
292 if (inet_addr == NULL) {
294 g_error_new (G_IO_ERROR, G_IO_ERROR_FAILED,
295 "Failed to parse address '%s'", self->priv->address);
296 goto invalid_address;
299 inet_addr = g_inet_address_new_any (G_SOCKET_FAMILY_IPV4);
302 GST_LOG_OBJECT (self, "creating socket");
303 socket = g_socket_new (g_inet_address_get_family (inet_addr),
304 G_SOCKET_TYPE_DATAGRAM, G_SOCKET_PROTOCOL_UDP, &err);
309 GST_DEBUG_OBJECT (self, "binding on port %d", self->priv->port);
310 socket_addr = g_inet_socket_address_new (inet_addr, self->priv->port);
311 if (!g_socket_bind (socket, socket_addr, TRUE, &err)) {
312 g_object_unref (socket_addr);
313 g_object_unref (inet_addr);
316 g_object_unref (socket_addr);
317 g_object_unref (inet_addr);
319 bound_addr = g_socket_get_local_address (socket, NULL);
320 port = g_inet_socket_address_get_port (G_INET_SOCKET_ADDRESS (bound_addr));
322 g_inet_socket_address_get_address (G_INET_SOCKET_ADDRESS (bound_addr));
323 address = g_inet_address_to_string (inet_addr);
325 if (g_strcmp0 (address, self->priv->address)) {
326 g_free (self->priv->address);
327 self->priv->address = address;
328 GST_DEBUG_OBJECT (self, "notifying address %s", address);
329 g_object_notify (G_OBJECT (self), "address");
333 if (port != self->priv->port) {
334 self->priv->port = port;
335 GST_DEBUG_OBJECT (self, "notifying port %d", port);
336 g_object_notify (G_OBJECT (self), "port");
338 GST_DEBUG_OBJECT (self, "bound on UDP address %s, port %d",
339 self->priv->address, port);
340 g_object_unref (bound_addr);
342 self->priv->socket = socket;
343 self->priv->cancel = g_cancellable_new ();
344 self->priv->made_cancel_fd =
345 g_cancellable_make_pollfd (self->priv->cancel, &dummy_pollfd);
347 self->priv->thread = g_thread_try_new ("GstNetTimeProvider",
348 gst_net_time_provider_thread, self, &err);
350 if (!self->priv->thread)
358 GST_ERROR_OBJECT (self, "invalid address: %s", self->priv->address);
359 g_propagate_error (error, err);
364 GST_ERROR_OBJECT (self, "could not create socket: %s", err->message);
365 g_propagate_error (error, err);
366 g_object_unref (inet_addr);
371 GST_ERROR_OBJECT (self, "bind failed: %s", err->message);
372 g_propagate_error (error, err);
373 g_object_unref (socket);
378 GST_ERROR_OBJECT (self, "could not create thread: %s", err->message);
379 g_propagate_error (error, err);
380 g_object_unref (self->priv->socket);
381 self->priv->socket = NULL;
382 g_object_unref (self->priv->cancel);
383 self->priv->cancel = NULL;
389 gst_net_time_provider_stop (GstNetTimeProvider * self)
391 g_return_if_fail (self->priv->thread != NULL);
393 GST_INFO_OBJECT (self, "stopping..");
394 g_cancellable_cancel (self->priv->cancel);
396 g_thread_join (self->priv->thread);
397 self->priv->thread = NULL;
399 if (self->priv->made_cancel_fd)
400 g_cancellable_release_fd (self->priv->cancel);
402 g_object_unref (self->priv->cancel);
403 self->priv->cancel = NULL;
405 g_object_unref (self->priv->socket);
406 self->priv->socket = NULL;
408 GST_INFO_OBJECT (self, "stopped");
412 gst_net_time_provider_initable_init (GInitable * initable,
413 GCancellable * cancellable, GError ** error)
415 GstNetTimeProvider *self = GST_NET_TIME_PROVIDER (initable);
417 return gst_net_time_provider_start (self, error);
421 gst_net_time_provider_initable_iface_init (gpointer g_iface)
423 GInitableIface *iface = g_iface;
425 iface->init = gst_net_time_provider_initable_init;
429 * gst_net_time_provider_new:
430 * @clock: a #GstClock to export over the network
431 * @address: (allow-none): an address to bind on as a dotted quad
432 * (xxx.xxx.xxx.xxx), IPv6 address, or NULL to bind to all addresses
433 * @port: a port to bind on, or 0 to let the kernel choose
435 * Allows network clients to get the current time of @clock.
437 * Returns: (transfer full): the new #GstNetTimeProvider, or NULL on error
440 gst_net_time_provider_new (GstClock * clock, const gchar * address, gint port)
442 GstNetTimeProvider *ret;
444 g_return_val_if_fail (clock && GST_IS_CLOCK (clock), NULL);
445 g_return_val_if_fail (port >= 0 && port <= G_MAXUINT16, NULL);
448 g_initable_new (GST_TYPE_NET_TIME_PROVIDER, NULL, NULL, "clock", clock,
449 "address", address, "port", port, NULL);
451 /* Clear floating flag */
452 g_object_ref_sink (ret);