mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-08 13:18:52 +00:00
428 lines
12 KiB
C
428 lines
12 KiB
C
/* GStreamer
|
|
* Copyright (C) 2005 Andy Wingo <wingo@pobox.com>
|
|
*
|
|
* 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., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
/**
|
|
* SECTION:gstnettimeprovider
|
|
* @short_description: Special object that exposed the time of a clock
|
|
* on the network.
|
|
* @see_also: #GstClock, #GstNetClientClock, #GstPipeline
|
|
*
|
|
* This object exposes the time of a #GstClock on the network.
|
|
*
|
|
* A #GstNetTimeProvider is created with gst_net_time_provider_new() which
|
|
* takes a #GstClock, an address and a port number as arguments.
|
|
*
|
|
* After creating the object, a client clock such as #GstNetClientClock can
|
|
* query the exposed clock over the network for its values.
|
|
*
|
|
* The #GstNetTimeProvider typically wraps the clock used by a #GstPipeline.
|
|
*
|
|
* Last reviewed on 2005-11-23 (0.9.5)
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "gstnettimeprovider.h"
|
|
#include "gstnettimepacket.h"
|
|
|
|
GST_DEBUG_CATEGORY_STATIC (ntp_debug);
|
|
#define GST_CAT_DEFAULT (ntp_debug)
|
|
|
|
#define DEFAULT_ADDRESS "0.0.0.0"
|
|
#define DEFAULT_PORT 5637
|
|
|
|
#define IS_ACTIVE(self) (g_atomic_int_get (&((self)->priv->active)))
|
|
|
|
enum
|
|
{
|
|
PROP_0,
|
|
PROP_PORT,
|
|
PROP_ADDRESS,
|
|
PROP_CLOCK,
|
|
PROP_ACTIVE
|
|
};
|
|
|
|
#define GST_NET_TIME_PROVIDER_GET_PRIVATE(obj) \
|
|
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_NET_TIME_PROVIDER, GstNetTimeProviderPrivate))
|
|
|
|
struct _GstNetTimeProviderPrivate
|
|
{
|
|
gchar *address;
|
|
int port;
|
|
|
|
GThread *thread;
|
|
|
|
GstClock *clock;
|
|
|
|
gboolean active; /* ATOMIC */
|
|
|
|
GSocket *socket;
|
|
GCancellable *cancel;
|
|
};
|
|
|
|
static gboolean gst_net_time_provider_start (GstNetTimeProvider * bself);
|
|
static void gst_net_time_provider_stop (GstNetTimeProvider * bself);
|
|
|
|
static gpointer gst_net_time_provider_thread (gpointer data);
|
|
|
|
static void gst_net_time_provider_finalize (GObject * object);
|
|
static void gst_net_time_provider_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec);
|
|
static void gst_net_time_provider_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec);
|
|
|
|
#define _do_init \
|
|
GST_DEBUG_CATEGORY_INIT (ntp_debug, "nettime", 0, "Network time provider");
|
|
|
|
#define gst_net_time_provider_parent_class parent_class
|
|
G_DEFINE_TYPE_WITH_CODE (GstNetTimeProvider, gst_net_time_provider,
|
|
GST_TYPE_OBJECT, _do_init);
|
|
|
|
static void
|
|
gst_net_time_provider_class_init (GstNetTimeProviderClass * klass)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
|
|
gobject_class = G_OBJECT_CLASS (klass);
|
|
|
|
g_assert (sizeof (GstClockTime) == 8);
|
|
|
|
g_type_class_add_private (klass, sizeof (GstNetTimeProviderPrivate));
|
|
|
|
gobject_class->finalize = gst_net_time_provider_finalize;
|
|
gobject_class->set_property = gst_net_time_provider_set_property;
|
|
gobject_class->get_property = gst_net_time_provider_get_property;
|
|
|
|
g_object_class_install_property (gobject_class, PROP_PORT,
|
|
g_param_spec_int ("port", "port",
|
|
"The port to receive the packets from, 0=allocate", 0, G_MAXUINT16,
|
|
DEFAULT_PORT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (gobject_class, PROP_ADDRESS,
|
|
g_param_spec_string ("address", "address",
|
|
"The address to bind on, as a dotted quad (x.x.x.x)",
|
|
DEFAULT_ADDRESS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (gobject_class, PROP_CLOCK,
|
|
g_param_spec_object ("clock", "Clock",
|
|
"The clock to export over the network", GST_TYPE_CLOCK,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (gobject_class, PROP_ACTIVE,
|
|
g_param_spec_boolean ("active", "Active",
|
|
"TRUE if the clock will respond to queries over the network", TRUE,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
}
|
|
|
|
static void
|
|
gst_net_time_provider_init (GstNetTimeProvider * self)
|
|
{
|
|
self->priv = GST_NET_TIME_PROVIDER_GET_PRIVATE (self);
|
|
|
|
self->priv->port = DEFAULT_PORT;
|
|
self->priv->address = g_strdup (DEFAULT_ADDRESS);
|
|
self->priv->thread = NULL;
|
|
self->priv->active = TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_net_time_provider_finalize (GObject * object)
|
|
{
|
|
GstNetTimeProvider *self = GST_NET_TIME_PROVIDER (object);
|
|
|
|
if (self->priv->thread) {
|
|
gst_net_time_provider_stop (self);
|
|
g_assert (self->priv->thread == NULL);
|
|
}
|
|
|
|
g_free (self->priv->address);
|
|
self->priv->address = NULL;
|
|
|
|
if (self->priv->clock)
|
|
gst_object_unref (self->priv->clock);
|
|
self->priv->clock = NULL;
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
static gpointer
|
|
gst_net_time_provider_thread (gpointer data)
|
|
{
|
|
GstNetTimeProvider *self = data;
|
|
GCancellable *cancel = self->priv->cancel;
|
|
GSocket *socket = self->priv->socket;
|
|
GstNetTimePacket *packet;
|
|
GError *err = NULL;
|
|
|
|
GST_INFO_OBJECT (self, "time provider thread is running");
|
|
|
|
while (TRUE) {
|
|
GSocketAddress *sender_addr = NULL;
|
|
|
|
GST_LOG_OBJECT (self, "waiting on socket");
|
|
if (!g_socket_condition_wait (socket, G_IO_IN, cancel, &err)) {
|
|
GST_INFO_OBJECT (self, "socket error: %s", err->message);
|
|
|
|
if (err->code == G_IO_ERROR_CANCELLED)
|
|
break;
|
|
|
|
/* try again */
|
|
g_usleep (G_USEC_PER_SEC / 10);
|
|
g_error_free (err);
|
|
err = NULL;
|
|
continue;
|
|
}
|
|
|
|
/* got data in */
|
|
packet = gst_net_time_packet_receive (socket, &sender_addr, &err);
|
|
|
|
if (err != NULL) {
|
|
GST_DEBUG_OBJECT (self, "receive error: %s", err->message);
|
|
g_usleep (G_USEC_PER_SEC / 10);
|
|
g_error_free (err);
|
|
err = NULL;
|
|
continue;
|
|
}
|
|
|
|
if (IS_ACTIVE (self)) {
|
|
/* do what we were asked to and send the packet back */
|
|
packet->remote_time = gst_clock_get_time (self->priv->clock);
|
|
|
|
/* ignore errors */
|
|
gst_net_time_packet_send (packet, socket, sender_addr, NULL);
|
|
g_object_unref (sender_addr);
|
|
g_free (packet);
|
|
}
|
|
}
|
|
|
|
if (err != NULL)
|
|
g_error_free (err);
|
|
|
|
GST_INFO_OBJECT (self, "time provider thread is stopping");
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
gst_net_time_provider_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstNetTimeProvider *self = GST_NET_TIME_PROVIDER (object);
|
|
GstClock **clock_p = &self->priv->clock;
|
|
|
|
switch (prop_id) {
|
|
case PROP_PORT:
|
|
self->priv->port = g_value_get_int (value);
|
|
break;
|
|
case PROP_ADDRESS:
|
|
g_free (self->priv->address);
|
|
if (g_value_get_string (value) == NULL)
|
|
self->priv->address = g_strdup (DEFAULT_ADDRESS);
|
|
else
|
|
self->priv->address = g_strdup (g_value_get_string (value));
|
|
break;
|
|
case PROP_CLOCK:
|
|
gst_object_replace ((GstObject **) clock_p,
|
|
(GstObject *) g_value_get_object (value));
|
|
break;
|
|
case PROP_ACTIVE:
|
|
g_atomic_int_set (&self->priv->active, g_value_get_boolean (value));
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_net_time_provider_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstNetTimeProvider *self = GST_NET_TIME_PROVIDER (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_PORT:
|
|
g_value_set_int (value, self->priv->port);
|
|
break;
|
|
case PROP_ADDRESS:
|
|
g_value_set_string (value, self->priv->address);
|
|
break;
|
|
case PROP_CLOCK:
|
|
g_value_set_object (value, self->priv->clock);
|
|
break;
|
|
case PROP_ACTIVE:
|
|
g_value_set_boolean (value, IS_ACTIVE (self));
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_net_time_provider_start (GstNetTimeProvider * self)
|
|
{
|
|
GSocketAddress *socket_addr, *bound_addr;
|
|
GInetAddress *inet_addr;
|
|
GSocket *socket;
|
|
GError *err = NULL;
|
|
int port;
|
|
gchar *address;
|
|
|
|
if (self->priv->address) {
|
|
inet_addr = g_inet_address_new_from_string (self->priv->address);
|
|
if (inet_addr == NULL)
|
|
goto invalid_address;
|
|
} else {
|
|
inet_addr = g_inet_address_new_any (G_SOCKET_FAMILY_IPV4);
|
|
}
|
|
|
|
GST_LOG_OBJECT (self, "creating socket");
|
|
socket = g_socket_new (g_inet_address_get_family (inet_addr),
|
|
G_SOCKET_TYPE_DATAGRAM, G_SOCKET_PROTOCOL_UDP, &err);
|
|
|
|
if (err != NULL)
|
|
goto no_socket;
|
|
|
|
GST_DEBUG_OBJECT (self, "binding on port %d", self->priv->port);
|
|
socket_addr = g_inet_socket_address_new (inet_addr, self->priv->port);
|
|
g_socket_bind (socket, socket_addr, TRUE, &err);
|
|
g_object_unref (socket_addr);
|
|
g_object_unref (inet_addr);
|
|
|
|
if (err != NULL)
|
|
goto bind_error;
|
|
|
|
bound_addr = g_socket_get_local_address (socket, NULL);
|
|
port = g_inet_socket_address_get_port (G_INET_SOCKET_ADDRESS (bound_addr));
|
|
inet_addr =
|
|
g_inet_socket_address_get_address (G_INET_SOCKET_ADDRESS (bound_addr));
|
|
address = g_inet_address_to_string (inet_addr);
|
|
|
|
if (g_strcmp0 (address, self->priv->address)) {
|
|
g_free (self->priv->address);
|
|
self->priv->address = address;
|
|
GST_DEBUG_OBJECT (self, "notifying address %s", address);
|
|
g_object_notify (G_OBJECT (self), "address");
|
|
} else {
|
|
g_free (address);
|
|
}
|
|
if (port != self->priv->port) {
|
|
self->priv->port = port;
|
|
GST_DEBUG_OBJECT (self, "notifying port %d", port);
|
|
g_object_notify (G_OBJECT (self), "port");
|
|
}
|
|
GST_DEBUG_OBJECT (self, "bound on UDP address %s, port %d", address, port);
|
|
g_object_unref (bound_addr);
|
|
|
|
self->priv->socket = socket;
|
|
self->priv->cancel = g_cancellable_new ();
|
|
|
|
self->priv->thread = g_thread_try_new ("GstNetTimeProvider",
|
|
gst_net_time_provider_thread, self, &err);
|
|
|
|
if (err != NULL)
|
|
goto no_thread;
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
invalid_address:
|
|
{
|
|
GST_ERROR_OBJECT (self, "invalid address: %s", self->priv->address);
|
|
return FALSE;
|
|
}
|
|
no_socket:
|
|
{
|
|
GST_ERROR_OBJECT (self, "could not create socket: %s", err->message);
|
|
g_error_free (err);
|
|
g_object_unref (inet_addr);
|
|
return FALSE;
|
|
}
|
|
bind_error:
|
|
{
|
|
GST_ERROR_OBJECT (self, "bind failed: %s", err->message);
|
|
g_error_free (err);
|
|
g_object_unref (socket);
|
|
return FALSE;
|
|
}
|
|
no_thread:
|
|
{
|
|
GST_ERROR_OBJECT (self, "could not create thread: %s", err->message);
|
|
g_error_free (err);
|
|
g_object_unref (self->priv->socket);
|
|
self->priv->socket = NULL;
|
|
g_object_unref (self->priv->cancel);
|
|
self->priv->cancel = NULL;
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_net_time_provider_stop (GstNetTimeProvider * self)
|
|
{
|
|
g_return_if_fail (self->priv->thread != NULL);
|
|
|
|
GST_INFO_OBJECT (self, "stopping..");
|
|
g_cancellable_cancel (self->priv->cancel);
|
|
|
|
g_thread_join (self->priv->thread);
|
|
self->priv->thread = NULL;
|
|
|
|
g_object_unref (self->priv->cancel);
|
|
self->priv->cancel = NULL;
|
|
|
|
g_object_unref (self->priv->socket);
|
|
self->priv->socket = NULL;
|
|
|
|
GST_INFO_OBJECT (self, "stopped");
|
|
}
|
|
|
|
/**
|
|
* gst_net_time_provider_new:
|
|
* @clock: a #GstClock to export over the network
|
|
* @address: (allow-none): an address to bind on as a dotted quad
|
|
* (xxx.xxx.xxx.xxx), IPv6 address, or NULL to bind to all addresses
|
|
* @port: a port to bind on, or 0 to let the kernel choose
|
|
*
|
|
* Allows network clients to get the current time of @clock.
|
|
*
|
|
* Returns: the new #GstNetTimeProvider, or NULL on error
|
|
*/
|
|
GstNetTimeProvider *
|
|
gst_net_time_provider_new (GstClock * clock, const gchar * address, gint port)
|
|
{
|
|
GstNetTimeProvider *ret;
|
|
|
|
g_return_val_if_fail (clock && GST_IS_CLOCK (clock), NULL);
|
|
g_return_val_if_fail (port >= 0 && port <= G_MAXUINT16, NULL);
|
|
|
|
ret = g_object_new (GST_TYPE_NET_TIME_PROVIDER, "clock", clock, "address",
|
|
address, "port", port, NULL);
|
|
|
|
if (!gst_net_time_provider_start (ret))
|
|
goto failed_start;
|
|
|
|
/* all systems go, cap'n */
|
|
return ret;
|
|
|
|
failed_start:
|
|
{
|
|
/* already printed a nice error */
|
|
gst_object_unref (ret);
|
|
return NULL;
|
|
}
|
|
}
|