/* GStreamer * Copyright (C) <2007> Wim Taymans * * 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. */ /** * SECTION:element-multiupdsink * @see_also: udpsink, multifdsink * * * * multiudpsink is a network sink that sends UDP packets to multiple * clients. * It can be combined with rtp payload encoders to implement RTP streaming. * * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "gstudp-marshal.h" #include "gstmultiudpsink.h" GST_DEBUG_CATEGORY_STATIC (multiudpsink_debug); #define GST_CAT_DEFAULT (multiudpsink_debug) static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS_ANY); /* elementfactory information */ static const GstElementDetails gst_multiudpsink_details = GST_ELEMENT_DETAILS ("UDP packet sender", "Sink/Network", "Send data over the network via UDP", "Wim Taymans "); /* MultiUDPSink signals and args */ enum { /* methods */ SIGNAL_ADD, SIGNAL_REMOVE, SIGNAL_CLEAR, SIGNAL_GET_STATS, /* signals */ SIGNAL_CLIENT_ADDED, SIGNAL_CLIENT_REMOVED, /* FILL ME */ LAST_SIGNAL }; #define DEFAULT_SOCKFD -1 #define DEFAULT_CLOSEFD TRUE #define DEFAULT_SOCK -1 #define DEFAULT_CLIENTS NULL enum { PROP_0, PROP_BYTES_TO_SERVE, PROP_BYTES_SERVED, PROP_SOCKFD, PROP_CLOSEFD, PROP_SOCK, PROP_CLIENTS /* FILL ME */ }; #define CLOSE_IF_REQUESTED(udpctx) \ if ((!udpctx->externalfd) || (udpctx->externalfd && udpctx->closefd)) \ CLOSE_SOCKET(udpctx->sock); \ udpctx->sock = -1; static void gst_multiudpsink_base_init (gpointer g_class); static void gst_multiudpsink_class_init (GstMultiUDPSinkClass * klass); static void gst_multiudpsink_init (GstMultiUDPSink * udpsink); static void gst_multiudpsink_finalize (GObject * object); static GstFlowReturn gst_multiudpsink_render (GstBaseSink * sink, GstBuffer * buffer); static GstStateChangeReturn gst_multiudpsink_change_state (GstElement * element, GstStateChange transition); static void gst_multiudpsink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_multiudpsink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_multiudpsink_add_internal (GstMultiUDPSink * sink, const gchar * host, gint port, gboolean lock); static void gst_multiudpsink_clear_internal (GstMultiUDPSink * sink, gboolean lock); static void free_client (GstUDPClient * client); static GstElementClass *parent_class = NULL; static guint gst_multiudpsink_signals[LAST_SIGNAL] = { 0 }; GType gst_multiudpsink_get_type (void) { static GType multiudpsink_type = 0; if (!multiudpsink_type) { static const GTypeInfo multiudpsink_info = { sizeof (GstMultiUDPSinkClass), gst_multiudpsink_base_init, NULL, (GClassInitFunc) gst_multiudpsink_class_init, NULL, NULL, sizeof (GstMultiUDPSink), 0, (GInstanceInitFunc) gst_multiudpsink_init, NULL }; multiudpsink_type = g_type_register_static (GST_TYPE_BASE_SINK, "GstMultiUDPSink", &multiudpsink_info, 0); } return multiudpsink_type; } static void gst_multiudpsink_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&sink_template)); gst_element_class_set_details (element_class, &gst_multiudpsink_details); } static void gst_multiudpsink_class_init (GstMultiUDPSinkClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; GstBaseSinkClass *gstbasesink_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gstbasesink_class = (GstBaseSinkClass *) klass; parent_class = g_type_class_peek_parent (klass); gobject_class->set_property = gst_multiudpsink_set_property; gobject_class->get_property = gst_multiudpsink_get_property; gobject_class->finalize = gst_multiudpsink_finalize; /** * GstMultiUDPSink::add: * @gstmultiudpsink: the sink on which the signal is emitted * @host: the hostname/IP address of the client to add * @port: the port of the client to add * * Add a client with destination @host and @port to the list of * clients. */ gst_multiudpsink_signals[SIGNAL_ADD] = g_signal_new ("add", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiUDPSinkClass, add), NULL, NULL, gst_udp_marshal_VOID__STRING_INT, G_TYPE_NONE, 2, G_TYPE_STRING, G_TYPE_INT); /** * GstMultiUDPSink::remove: * @gstmultiudpsink: the sink on which the signal is emitted * @host: the hostname/IP address of the client to remove * @port: the port of the client to remove * * Remove the client with destination @host and @port from the list of * clients. */ gst_multiudpsink_signals[SIGNAL_REMOVE] = g_signal_new ("remove", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiUDPSinkClass, remove), NULL, NULL, gst_udp_marshal_VOID__STRING_INT, G_TYPE_NONE, 2, G_TYPE_STRING, G_TYPE_INT); /** * GstMultiUDPSink::clear: * @gstmultiudpsink: the sink on which the signal is emitted * * Clear the list of clients. */ gst_multiudpsink_signals[SIGNAL_CLEAR] = g_signal_new ("clear", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiUDPSinkClass, clear), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); /** * GstMultiUDPSink::get-stats: * @gstmultiudpsink: the sink on which the signal is emitted * @host: the hostname/IP address of the client to get stats on * @port: the port of the client to get stats on * * Get the statistics of the client with destination @host and @port. * * Returns: a GValueArray of uint64: bytes_sent, packets_sent, * connect_time (in epoch seconds), disconnect_time (in epoch seconds) */ gst_multiudpsink_signals[SIGNAL_GET_STATS] = g_signal_new ("get-stats", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiUDPSinkClass, get_stats), NULL, NULL, gst_udp_marshal_BOXED__STRING_INT, G_TYPE_VALUE_ARRAY, 2, G_TYPE_STRING, G_TYPE_INT); /** * GstMultiUDPSink::client-added: * @gstmultiudpsink: the sink emitting the signal * @host: the hostname/IP address of the added client * @port: the port of the added client * * Signal emited when a new client is added to the list of * clients. */ gst_multiudpsink_signals[SIGNAL_CLIENT_ADDED] = g_signal_new ("client-added", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiUDPSinkClass, client_added), NULL, NULL, gst_udp_marshal_VOID__STRING_INT, G_TYPE_NONE, 2, G_TYPE_STRING, G_TYPE_INT); /** * GstMultiUDPSink::client-removed: * @gstmultiudpsink: the sink emitting the signal * @host: the hostname/IP address of the removed client * @port: the port of the removed client * * Signal emited when a client is removed from the list of * clients. */ gst_multiudpsink_signals[SIGNAL_CLIENT_REMOVED] = g_signal_new ("client-removed", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiUDPSinkClass, client_removed), NULL, NULL, gst_udp_marshal_VOID__STRING_INT, G_TYPE_NONE, 2, G_TYPE_STRING, G_TYPE_INT); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BYTES_TO_SERVE, g_param_spec_uint64 ("bytes-to-serve", "Bytes to serve", "Number of bytes received to serve to clients", 0, G_MAXUINT64, 0, G_PARAM_READABLE)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BYTES_SERVED, g_param_spec_uint64 ("bytes-served", "Bytes served", "Total number of bytes send to all clients", 0, G_MAXUINT64, 0, G_PARAM_READABLE)); g_object_class_install_property (gobject_class, PROP_SOCKFD, g_param_spec_int ("sockfd", "Socket Handle", "Socket to use for UDP sending. (-1 == allocate)", -1, G_MAXINT, DEFAULT_SOCKFD, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_CLOSEFD, g_param_spec_boolean ("closefd", "Close sockfd", "Close sockfd if passed as property on state change", DEFAULT_CLOSEFD, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_SOCK, g_param_spec_int ("sock", "Socket Handle", "Socket currently in use for UDP sending. (-1 == no socket)", -1, G_MAXINT, DEFAULT_SOCK, G_PARAM_READABLE)); g_object_class_install_property (gobject_class, PROP_CLIENTS, g_param_spec_string ("clients", "Clients", "A comma separated list of host:port pairs with destinations", DEFAULT_CLIENTS, G_PARAM_READWRITE)); gstelement_class->change_state = gst_multiudpsink_change_state; gstbasesink_class->render = gst_multiudpsink_render; klass->add = gst_multiudpsink_add; klass->remove = gst_multiudpsink_remove; klass->clear = gst_multiudpsink_clear; klass->get_stats = gst_multiudpsink_get_stats; GST_DEBUG_CATEGORY_INIT (multiudpsink_debug, "multiudpsink", 0, "UDP sink"); } static void gst_multiudpsink_init (GstMultiUDPSink * sink) { WSA_STARTUP (sink); sink->client_lock = g_mutex_new (); sink->sock = -1; sink->sockfd = DEFAULT_SOCKFD; sink->closefd = DEFAULT_CLOSEFD; sink->externalfd = (sink->sockfd != -1); } static void gst_multiudpsink_finalize (GObject * object) { GstMultiUDPSink *sink; sink = GST_MULTIUDPSINK (object); g_list_foreach (sink->clients, (GFunc) free_client, NULL); g_list_free (sink->clients); g_mutex_free (sink->client_lock); WSA_CLEANUP (object); G_OBJECT_CLASS (parent_class)->finalize (object); } static GstFlowReturn gst_multiudpsink_render (GstBaseSink * bsink, GstBuffer * buffer) { GstMultiUDPSink *sink; gint ret, size, num = 0; guint8 *data; GList *clients; sink = GST_MULTIUDPSINK (bsink); size = GST_BUFFER_SIZE (buffer); data = GST_BUFFER_DATA (buffer); sink->bytes_to_serve += size; /* grab lock while iterating and sending to clients, this shuld be * fast as UDP never blocks */ g_mutex_lock (sink->client_lock); GST_LOG_OBJECT (bsink, "about to send %d bytes", size); for (clients = sink->clients; clients; clients = g_list_next (clients)) { GstUDPClient *client; client = (GstUDPClient *) clients->data; num++; GST_LOG_OBJECT (sink, "sending %d bytes to client %p", size, client); while (TRUE) { ret = sendto (*client->sock, data, size, 0, (struct sockaddr *) &client->theiraddr, sizeof (client->theiraddr)); if (ret < 0) { if (errno != EINTR && errno != EAGAIN) { goto send_error; } } else { client->bytes_sent += ret; client->packets_sent++; sink->bytes_served += ret; break; } } } g_mutex_unlock (sink->client_lock); GST_LOG_OBJECT (sink, "sent %d bytes to %d clients", size, num); return GST_FLOW_OK; /* ERRORS */ send_error: { /* if sendto returns an error, something is seriously wrong */ g_mutex_unlock (sink->client_lock); GST_DEBUG_OBJECT (sink, "got send error %d: %s", errno, g_strerror (errno)); GST_ELEMENT_ERROR (sink, STREAM, FAILED, (NULL), ("Got send error %d: %s", errno, g_strerror (errno))); return GST_FLOW_ERROR; } } static void gst_multiudpsink_set_clients_string (GstMultiUDPSink * sink, const gchar * string) { gchar **clients; gint i; clients = g_strsplit (string, ",", 0); g_mutex_lock (sink->client_lock); /* clear all existing clients */ gst_multiudpsink_clear_internal (sink, FALSE); for (i = 0; clients[i]; i++) { gchar *host, *p; gint port = 0; host = clients[i]; p = strstr (clients[i], ":"); if (p != NULL) { *p = '\0'; port = atoi (p + 1); } if (port != 0) gst_multiudpsink_add_internal (sink, host, port, FALSE); } g_mutex_unlock (sink->client_lock); g_strfreev (clients); } static gchar * gst_multiudpsink_get_clients_string (GstMultiUDPSink * sink) { GString *str; GList *clients; str = g_string_new (""); g_mutex_lock (sink->client_lock); clients = sink->clients; while (clients) { GstUDPClient *client; client = (GstUDPClient *) clients->data; clients = g_list_next (clients); g_string_append_printf (str, "%s:%d%s", client->host, client->port, (clients ? "," : "")); } g_mutex_unlock (sink->client_lock); return g_string_free (str, FALSE); } static void gst_multiudpsink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstMultiUDPSink *udpsink; udpsink = GST_MULTIUDPSINK (object); switch (prop_id) { case PROP_SOCKFD: udpsink->sockfd = g_value_get_int (value); GST_DEBUG_OBJECT (udpsink, "setting SOCKFD to %d", udpsink->sockfd); break; case PROP_CLOSEFD: udpsink->closefd = g_value_get_boolean (value); break; case PROP_CLIENTS: gst_multiudpsink_set_clients_string (udpsink, g_value_get_string (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_multiudpsink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstMultiUDPSink *udpsink; udpsink = GST_MULTIUDPSINK (object); switch (prop_id) { case PROP_BYTES_TO_SERVE: g_value_set_uint64 (value, udpsink->bytes_to_serve); break; case PROP_BYTES_SERVED: g_value_set_uint64 (value, udpsink->bytes_served); break; case PROP_SOCKFD: g_value_set_int (value, udpsink->sockfd); break; case PROP_CLOSEFD: g_value_set_boolean (value, udpsink->closefd); break; case PROP_SOCK: g_value_set_int (value, udpsink->sock); break; case PROP_CLIENTS: g_value_take_string (value, gst_multiudpsink_get_clients_string (udpsink)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void join_multicast (GstUDPClient * client) { unsigned char ttl = 64; unsigned char loop = 1; /* Joining the multicast group */ /* FIXME, can we use multicast and unicast over the same * socket? if not, search for socket of this multicast group or * create a new one. */ if (setsockopt (*(client->sock), IPPROTO_IP, IP_ADD_MEMBERSHIP, &(client->multi_addr), sizeof (client->multi_addr)) < 0) perror ("setsockopt IP_ADD_MEMBERSHIP\n"); if (setsockopt (*(client->sock), IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof (ttl)) < 0) perror ("setsockopt IP_MULTICAST_TTL\n"); if (setsockopt (*(client->sock), IPPROTO_IP, IP_MULTICAST_LOOP, &loop, sizeof (loop)) < 0) perror ("setsockopt IP_MULTICAST_LOOP\n"); } static void leave_multicast (GstUDPClient * client) { if (setsockopt (*(client->sock), IPPROTO_IP, IP_DROP_MEMBERSHIP, &(client->multi_addr), sizeof (client->multi_addr)) < 0) perror ("setsockopt IP_DROP_MEMBERSHIP\n"); } /* create a socket for sending to remote machine */ static gboolean gst_multiudpsink_init_send (GstMultiUDPSink * sink) { guint bc_val; gint ret; GList *clients; GstUDPClient *client; if (sink->sockfd == -1) { /* create sender socket */ if ((sink->sock = socket (AF_INET, SOCK_DGRAM, 0)) == -1) goto no_socket; sink->externalfd = FALSE; } else { /* we use the configured socket */ sink->sock = sink->sockfd; sink->externalfd = TRUE; } bc_val = 1; if ((ret = setsockopt (sink->sock, SOL_SOCKET, SO_BROADCAST, &bc_val, sizeof (bc_val))) < 0) goto no_broadcast; sink->bytes_to_serve = 0; sink->bytes_served = 0; /* look for multicast clients and join multicast groups approptiately */ for (clients = sink->clients; clients; clients = g_list_next (clients)) { client = (GstUDPClient *) clients->data; if (client->multi_addr.imr_multiaddr.s_addr) join_multicast (client); } return TRUE; /* ERRORS */ no_socket: { GST_ELEMENT_ERROR (sink, RESOURCE, FAILED, (NULL), ("Could not create socket (%d): %s", errno, g_strerror (errno))); return FALSE; } no_broadcast: { CLOSE_IF_REQUESTED (sink); GST_ELEMENT_ERROR (sink, RESOURCE, SETTINGS, (NULL), ("Could not set broadcast socket option (%d): %s", errno, g_strerror (errno))); return FALSE; } } static void gst_multiudpsink_close (GstMultiUDPSink * sink) { CLOSE_IF_REQUESTED (sink); } static void gst_multiudpsink_add_internal (GstMultiUDPSink * sink, const gchar * host, gint port, gboolean lock) { struct hostent *he; struct in_addr addr; GstUDPClient *client; GTimeVal now; GST_DEBUG_OBJECT (sink, "adding client on host %s, port %d", host, port); client = g_new0 (GstUDPClient, 1); client->host = g_strdup (host); client->port = port; client->sock = &sink->sock; memset (&client->theiraddr, 0, sizeof (client->theiraddr)); memset (&client->multi_addr, 0, sizeof (client->multi_addr)); client->theiraddr.sin_family = AF_INET; /* host byte order */ client->theiraddr.sin_port = htons (port); /* short, network byte order */ g_get_current_time (&now); client->connect_time = GST_TIMEVAL_TO_TIME (now); /* if its an IP address */ if (inet_aton (host, &addr)) { /* check if its a multicast address */ if ((ntohl (addr.s_addr) & 0xf0000000) == 0xe0000000) { GST_DEBUG_OBJECT (sink, "multicast address detected"); client->multi_addr.imr_multiaddr.s_addr = addr.s_addr; client->multi_addr.imr_interface.s_addr = INADDR_ANY; client->theiraddr.sin_addr = client->multi_addr.imr_multiaddr; } else { GST_DEBUG_OBJECT (sink, "normal address detected"); client->theiraddr.sin_addr = *((struct in_addr *) &addr); } /* if init_send has already been called, set sockopts for multicast */ if (*client->sock > 0 && client->multi_addr.imr_multiaddr.s_addr) join_multicast (client); } /* we dont need to lookup for localhost */ else if (strcmp (host, "localhost") == 0 && inet_aton ("127.0.0.1", &addr)) { client->theiraddr.sin_addr = *((struct in_addr *) &addr); } /* if its a hostname */ else if ((he = gethostbyname (host))) { client->theiraddr.sin_addr = *((struct in_addr *) he->h_addr); } else { goto host_error; } if (lock) g_mutex_lock (sink->client_lock); sink->clients = g_list_prepend (sink->clients, client); if (lock) g_mutex_unlock (sink->client_lock); g_signal_emit (G_OBJECT (sink), gst_multiudpsink_signals[SIGNAL_CLIENT_ADDED], 0, host, port); return; /* ERRORS */ host_error: { GST_WARNING_OBJECT (sink, "hostname lookup error?"); g_free (client->host); g_free (client); return; } } void gst_multiudpsink_add (GstMultiUDPSink * sink, const gchar * host, gint port) { gst_multiudpsink_add_internal (sink, host, port, TRUE); } static gint client_compare (GstUDPClient * a, GstUDPClient * b) { if ((a->port == b->port) && (strcmp (a->host, b->host) == 0)) return 0; return 1; } static void free_client (GstUDPClient * client) { g_free (client->host); g_free (client); } void gst_multiudpsink_remove (GstMultiUDPSink * sink, const gchar * host, gint port) { GList *find; GstUDPClient udpclient; GstUDPClient *client; GTimeVal now; udpclient.host = (gchar *) host; udpclient.port = port; g_mutex_lock (sink->client_lock); find = g_list_find_custom (sink->clients, &udpclient, (GCompareFunc) client_compare); if (!find) goto not_found; GST_DEBUG_OBJECT (sink, "remove client with host %s, port %d", host, port); client = (GstUDPClient *) find->data; g_get_current_time (&now); client->disconnect_time = GST_TIMEVAL_TO_TIME (now); if (client->multi_addr.imr_multiaddr.s_addr) leave_multicast (client); /* Unlock to emit signal before we delete the actual client */ g_mutex_unlock (sink->client_lock); g_signal_emit (G_OBJECT (sink), gst_multiudpsink_signals[SIGNAL_CLIENT_REMOVED], 0, host, port); g_mutex_lock (sink->client_lock); sink->clients = g_list_delete_link (sink->clients, find); free_client (client); g_mutex_unlock (sink->client_lock); return; /* ERRORS */ not_found: { g_mutex_unlock (sink->client_lock); GST_WARNING_OBJECT (sink, "client at host %s, port %d not found", host, port); return; } } static void gst_multiudpsink_clear_internal (GstMultiUDPSink * sink, gboolean lock) { GST_DEBUG_OBJECT (sink, "clearing"); /* we only need to remove the client structure, there is no additional * socket or anything to free for UDP */ if (lock) g_mutex_lock (sink->client_lock); g_list_foreach (sink->clients, (GFunc) free_client, sink); g_list_free (sink->clients); sink->clients = NULL; if (lock) g_mutex_unlock (sink->client_lock); } void gst_multiudpsink_clear (GstMultiUDPSink * sink) { gst_multiudpsink_clear_internal (sink, TRUE); } GValueArray * gst_multiudpsink_get_stats (GstMultiUDPSink * sink, const gchar * host, gint port) { GstUDPClient *client; GValueArray *result = NULL; GstUDPClient udpclient; GList *find; GValue value = { 0 }; udpclient.host = (gchar *) host; udpclient.port = port; g_mutex_lock (sink->client_lock); find = g_list_find_custom (sink->clients, &udpclient, (GCompareFunc) client_compare); if (!find) goto not_found; GST_DEBUG_OBJECT (sink, "stats for client with host %s, port %d", host, port); client = (GstUDPClient *) find->data; /* Result is a value array of (bytes_sent, packets_sent, * connect_time, disconnect_time), all as uint64 */ result = g_value_array_new (4); g_value_init (&value, G_TYPE_UINT64); g_value_set_uint64 (&value, client->bytes_sent); result = g_value_array_append (result, &value); g_value_unset (&value); g_value_init (&value, G_TYPE_UINT64); g_value_set_uint64 (&value, client->packets_sent); result = g_value_array_append (result, &value); g_value_unset (&value); g_value_init (&value, G_TYPE_UINT64); g_value_set_uint64 (&value, client->connect_time); result = g_value_array_append (result, &value); g_value_unset (&value); g_value_init (&value, G_TYPE_UINT64); g_value_set_uint64 (&value, client->disconnect_time); result = g_value_array_append (result, &value); g_value_unset (&value); g_mutex_unlock (sink->client_lock); return result; /* ERRORS */ not_found: { g_mutex_unlock (sink->client_lock); GST_WARNING_OBJECT (sink, "client with host %s, port %d not found", host, port); /* Apparently (see comment in gstmultifdsink.c) returning NULL from here may * confuse/break python bindings */ return g_value_array_new (0); } } static GstStateChangeReturn gst_multiudpsink_change_state (GstElement * element, GstStateChange transition) { GstStateChangeReturn ret; GstMultiUDPSink *sink; sink = GST_MULTIUDPSINK (element); switch (transition) { case GST_STATE_CHANGE_READY_TO_PAUSED: if (!gst_multiudpsink_init_send (sink)) goto no_init; break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: gst_multiudpsink_close (sink); break; default: break; } return ret; /* ERRORS */ no_init: { /* _init_send() posted specific error already */ return GST_STATE_CHANGE_FAILURE; } }