/* GStreamer * Copyright (C) <1999> Erik Walthinsen * Copyright (C) <2004> Thomas Vander Stichele * Copyright (C) 2006 Wim Taymans * Copyright (C) <2011> Collabora Ltd. * Author: Sebastian Dröge * * 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-multisocketsink * @see_also: tcpserversink * * This plugin writes incoming data to a set of file descriptors. The * file descriptors can be added to multisocketsink by emitting the #GstMultiSocketSink::add signal. * For each descriptor added, the #GstMultiSocketSink::client-added signal will be called. * * As of version 0.10.8, a client can also be added with the #GstMultiSocketSink::add-full signal * that allows for more control over what and how much data a client * initially receives. * * Clients can be removed from multisocketsink by emitting the #GstMultiSocketSink::remove signal. For * each descriptor removed, the #GstMultiSocketSink::client-removed signal will be called. The * #GstMultiSocketSink::client-removed signal can also be fired when multisocketsink decides that a * client is not active anymore or, depending on the value of the * #GstMultiSocketSink:recover-policy property, if the client is reading too slowly. * In all cases, multisocketsink will never close a file descriptor itself. * The user of multisocketsink is responsible for closing all file descriptors. * This can for example be done in response to the #GstMultiSocketSink::client-fd-removed signal. * Note that multisocketsink still has a reference to the file descriptor when the * #GstMultiSocketSink::client-removed signal is emitted, so that "get-stats" can be performed on * the descriptor; it is therefore not safe to close the file descriptor in * the #GstMultiSocketSink::client-removed signal handler, and you should use the * #GstMultiSocketSink::client-fd-removed signal to safely close the fd. * * Multisocketsink internally keeps a queue of the incoming buffers and uses a * separate thread to send the buffers to the clients. This ensures that no * client write can block the pipeline and that clients can read with different * speeds. * * When adding a client to multisocketsink, the #GstMultiSocketSink:sync-method property will define * which buffer in the queued buffers will be sent first to the client. Clients * can be sent the most recent buffer (which might not be decodable by the * client if it is not a keyframe), the next keyframe received in * multisocketsink (which can take some time depending on the keyframe rate), or the * last received keyframe (which will cause a simple burst-on-connect). * Multisocketsink will always keep at least one keyframe in its internal buffers * when the sync-mode is set to latest-keyframe. * * As of version 0.10.8, there are additional values for the #GstMultiSocketSink:sync-method * property to allow finer control over burst-on-connect behaviour. By selecting * the 'burst' method a minimum burst size can be chosen, 'burst-keyframe' * additionally requires that the burst begin with a keyframe, and * 'burst-with-keyframe' attempts to burst beginning with a keyframe, but will * prefer a minimum burst size even if it requires not starting with a keyframe. * * Multisocketsink can be instructed to keep at least a minimum amount of data * expressed in time or byte units in its internal queues with the * #GstMultiSocketSink:time-min and #GstMultiSocketSink:bytes-min properties respectively. * These properties are useful if the application adds clients with the * #GstMultiSocketSink::add-full signal to make sure that a burst connect can * actually be honored. * * When streaming data, clients are allowed to read at a different rate than * the rate at which multisocketsink receives data. If the client is reading too * fast, no data will be send to the client until multisocketsink receives more * data. If the client, however, reads too slowly, data for that client will be * queued up in multisocketsink. Two properties control the amount of data * (buffers) that is queued in multisocketsink: #GstMultiSocketSink:buffers-max and * #GstMultiSocketSink:buffers-soft-max. A client that falls behind by * #GstMultiSocketSink:buffers-max is removed from multisocketsink forcibly. * * A client with a lag of at least #GstMultiSocketSink:buffers-soft-max enters the recovery * procedure which is controlled with the #GstMultiSocketSink:recover-policy property. * A recover policy of NONE will do nothing, RESYNC_LATEST will send the most recently * received buffer as the next buffer for the client, RESYNC_SOFT_LIMIT * positions the client to the soft limit in the buffer queue and * RESYNC_KEYFRAME positions the client at the most recent keyframe in the * buffer queue. * * multisocketsink will by default synchronize on the clock before serving the * buffers to the clients. This behaviour can be disabled by setting the sync * property to FALSE. Multisocketsink will by default not do QoS and will never * drop late buffers. * * Last reviewed on 2006-09-12 (0.10.10) */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "gstmultisocketsink.h" #include "gsttcp-marshal.h" #ifndef G_OS_WIN32 #include #endif #define NOT_IMPLEMENTED 0 GST_DEBUG_CATEGORY_STATIC (multisocketsink_debug); #define GST_CAT_DEFAULT (multisocketsink_debug) /* MultiSocketSink signals and args */ enum { /* methods */ SIGNAL_ADD, SIGNAL_ADD_BURST, SIGNAL_REMOVE, SIGNAL_REMOVE_FLUSH, SIGNAL_GET_STATS, /* signals */ SIGNAL_CLIENT_ADDED, SIGNAL_CLIENT_REMOVED, SIGNAL_CLIENT_SOCKET_REMOVED, LAST_SIGNAL }; enum { PROP_0, PROP_NUM_SOCKETS, PROP_LAST }; static void gst_multi_socket_sink_finalize (GObject * object); static void gst_multi_socket_sink_stop_pre (GstMultiHandleSink * mhsink); static void gst_multi_socket_sink_stop_post (GstMultiHandleSink * mhsink); static gboolean gst_multi_socket_sink_start_pre (GstMultiHandleSink * mhsink); static gpointer gst_multi_socket_sink_thread (GstMultiHandleSink * mhsink); static void gst_multi_socket_sink_queue_buffer (GstMultiHandleSink * mhsink, GstBuffer * buffer); static gboolean gst_multi_socket_sink_client_queue_buffer (GstMultiHandleSink * mhsink, GstMultiHandleClient * mhclient, GstBuffer * buffer); static int gst_multi_socket_sink_client_get_fd (GstMultiHandleClient * client); static void gst_multi_socket_sink_remove_client_link (GstMultiHandleSink * sink, GList * link); static gboolean gst_multi_socket_sink_socket_condition (GSocket * socket, GIOCondition condition, GstMultiSocketSink * sink); static gboolean gst_multi_socket_sink_unlock (GstBaseSink * bsink); static gboolean gst_multi_socket_sink_unlock_stop (GstBaseSink * bsink); static void gst_multi_socket_sink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_multi_socket_sink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); #define gst_multi_socket_sink_parent_class parent_class G_DEFINE_TYPE (GstMultiSocketSink, gst_multi_socket_sink, GST_TYPE_MULTI_HANDLE_SINK); static guint gst_multi_socket_sink_signals[LAST_SIGNAL] = { 0 }; static void gst_multi_socket_sink_class_init (GstMultiSocketSinkClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; GstBaseSinkClass *gstbasesink_class; GstMultiHandleSinkClass *gstmultihandlesink_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gstbasesink_class = (GstBaseSinkClass *) klass; gstmultihandlesink_class = (GstMultiHandleSinkClass *) klass; gobject_class->set_property = gst_multi_socket_sink_set_property; gobject_class->get_property = gst_multi_socket_sink_get_property; gobject_class->finalize = gst_multi_socket_sink_finalize; g_object_class_install_property (gobject_class, PROP_NUM_SOCKETS, g_param_spec_uint ("num-sockets", "Number of sockets", "The current number of client sockets", 0, G_MAXUINT, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); /** * GstMultiSocketSink::add: * @gstmultisocketsink: the multisocketsink element to emit this signal on * @socket: the socket to add to multisocketsink * * Hand the given open socket to multisocketsink to write to. */ gst_multi_socket_sink_signals[SIGNAL_ADD] = g_signal_new ("add", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstMultiSocketSinkClass, add), NULL, NULL, g_cclosure_marshal_VOID__OBJECT, G_TYPE_NONE, 1, G_TYPE_SOCKET); /** * GstMultiSocketSink::add-full: * @gstmultisocketsink: the multisocketsink element to emit this signal on * @socket: the socket to add to multisocketsink * @sync: the sync method to use * @format_min: the format of @value_min * @value_min: the minimum amount of data to burst expressed in * @format_min units. * @format_max: the format of @value_max * @value_max: the maximum amount of data to burst expressed in * @format_max units. * * Hand the given open socket to multisocketsink to write to and * specify the burst parameters for the new connection. */ gst_multi_socket_sink_signals[SIGNAL_ADD_BURST] = g_signal_new ("add-full", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstMultiSocketSinkClass, add_full), NULL, NULL, gst_tcp_marshal_VOID__OBJECT_ENUM_ENUM_UINT64_ENUM_UINT64, G_TYPE_NONE, 6, G_TYPE_SOCKET, GST_TYPE_SYNC_METHOD, GST_TYPE_FORMAT, G_TYPE_UINT64, GST_TYPE_FORMAT, G_TYPE_UINT64); /** * GstMultiSocketSink::remove: * @gstmultisocketsink: the multisocketsink element to emit this signal on * @socket: the socket to remove from multisocketsink * * Remove the given open socket from multisocketsink. */ gst_multi_socket_sink_signals[SIGNAL_REMOVE] = g_signal_new ("remove", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstMultiSocketSinkClass, remove), NULL, NULL, g_cclosure_marshal_VOID__OBJECT, G_TYPE_NONE, 1, G_TYPE_SOCKET); /** * GstMultiSocketSink::remove-flush: * @gstmultisocketsink: the multisocketsink element to emit this signal on * @socket: the socket to remove from multisocketsink * * Remove the given open socket from multisocketsink after flushing all * the pending data to the socket. */ gst_multi_socket_sink_signals[SIGNAL_REMOVE_FLUSH] = g_signal_new ("remove-flush", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstMultiSocketSinkClass, remove_flush), NULL, NULL, g_cclosure_marshal_VOID__OBJECT, G_TYPE_NONE, 1, G_TYPE_SOCKET); /** * GstMultiSocketSink::get-stats: * @gstmultisocketsink: the multisocketsink element to emit this signal on * @socket: the socket to get stats of from multisocketsink * * Get statistics about @socket. This function returns a GstStructure. * * Returns: a GstStructure with the statistics. The structure contains * values that represent: total number of bytes sent, time * when the client was added, time when the client was * disconnected/removed, time the client is/was active, last activity * time (in epoch seconds), number of buffers dropped. * All times are expressed in nanoseconds (GstClockTime). */ gst_multi_socket_sink_signals[SIGNAL_GET_STATS] = g_signal_new ("get-stats", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstMultiSocketSinkClass, get_stats), NULL, NULL, gst_tcp_marshal_BOXED__OBJECT, GST_TYPE_STRUCTURE, 1, G_TYPE_SOCKET); /** * GstMultiSocketSink::client-added: * @gstmultisocketsink: the multisocketsink element that emitted this signal * @socket: the socket that was added to multisocketsink * * The given socket was added to multisocketsink. This signal will * be emitted from the streaming thread so application should be prepared * for that. */ gst_multi_socket_sink_signals[SIGNAL_CLIENT_ADDED] = g_signal_new ("client-added", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiSocketSinkClass, client_added), NULL, NULL, g_cclosure_marshal_VOID__OBJECT, G_TYPE_NONE, 1, G_TYPE_OBJECT); /** * GstMultiSocketSink::client-removed: * @gstmultisocketsink: the multisocketsink element that emitted this signal * @socket: the socket that is to be removed from multisocketsink * @status: the reason why the client was removed * * The given socket is about to be removed from multisocketsink. This * signal will be emitted from the streaming thread so applications should * be prepared for that. * * @gstmultisocketsink still holds a handle to @socket so it is possible to call * the get-stats signal from this callback. For the same reason it is * not safe to close() and reuse @socket in this callback. */ gst_multi_socket_sink_signals[SIGNAL_CLIENT_REMOVED] = g_signal_new ("client-removed", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiSocketSinkClass, client_removed), NULL, NULL, gst_tcp_marshal_VOID__OBJECT_ENUM, G_TYPE_NONE, 2, G_TYPE_INT, GST_TYPE_CLIENT_STATUS); /** * GstMultiSocketSink::client-socket-removed: * @gstmultisocketsink: the multisocketsink element that emitted this signal * @socket: the socket that was removed from multisocketsink * * The given socket was removed from multisocketsink. This signal will * be emitted from the streaming thread so applications should be prepared * for that. * * In this callback, @gstmultisocketsink has removed all the information * associated with @socket and it is therefore not possible to call get-stats * with @socket. It is however safe to close() and reuse @fd in the callback. * * Since: 0.10.7 */ gst_multi_socket_sink_signals[SIGNAL_CLIENT_SOCKET_REMOVED] = g_signal_new ("client-socket-removed", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiSocketSinkClass, client_socket_removed), NULL, NULL, g_cclosure_marshal_VOID__OBJECT, G_TYPE_NONE, 1, G_TYPE_SOCKET); gst_element_class_set_details_simple (gstelement_class, "Multi socket sink", "Sink/Network", "Send data to multiple sockets", "Thomas Vander Stichele , " "Wim Taymans , " "Sebastian Dröge "); gstbasesink_class->unlock = GST_DEBUG_FUNCPTR (gst_multi_socket_sink_unlock); gstbasesink_class->unlock_stop = GST_DEBUG_FUNCPTR (gst_multi_socket_sink_unlock_stop); gstmultihandlesink_class->stop_pre = GST_DEBUG_FUNCPTR (gst_multi_socket_sink_stop_pre); gstmultihandlesink_class->stop_post = GST_DEBUG_FUNCPTR (gst_multi_socket_sink_stop_post); gstmultihandlesink_class->start_pre = GST_DEBUG_FUNCPTR (gst_multi_socket_sink_start_pre); gstmultihandlesink_class->thread = GST_DEBUG_FUNCPTR (gst_multi_socket_sink_thread); gstmultihandlesink_class->queue_buffer = GST_DEBUG_FUNCPTR (gst_multi_socket_sink_queue_buffer); gstmultihandlesink_class->client_queue_buffer = GST_DEBUG_FUNCPTR (gst_multi_socket_sink_client_queue_buffer); gstmultihandlesink_class->client_get_fd = GST_DEBUG_FUNCPTR (gst_multi_socket_sink_client_get_fd); gstmultihandlesink_class->remove_client_link = GST_DEBUG_FUNCPTR (gst_multi_socket_sink_remove_client_link); klass->add = GST_DEBUG_FUNCPTR (gst_multi_socket_sink_add); klass->add_full = GST_DEBUG_FUNCPTR (gst_multi_socket_sink_add_full); klass->remove = GST_DEBUG_FUNCPTR (gst_multi_socket_sink_remove); klass->remove_flush = GST_DEBUG_FUNCPTR (gst_multi_socket_sink_remove_flush); klass->get_stats = GST_DEBUG_FUNCPTR (gst_multi_socket_sink_get_stats); GST_DEBUG_CATEGORY_INIT (multisocketsink_debug, "multisocketsink", 0, "Multi socket sink"); } static void gst_multi_socket_sink_init (GstMultiSocketSink * this) { this->socket_hash = g_hash_table_new (g_direct_hash, g_int_equal); this->cancellable = g_cancellable_new (); } static void gst_multi_socket_sink_finalize (GObject * object) { GstMultiSocketSink *this = GST_MULTI_SOCKET_SINK (object); g_hash_table_destroy (this->socket_hash); if (this->cancellable) { g_object_unref (this->cancellable); this->cancellable = NULL; } G_OBJECT_CLASS (parent_class)->finalize (object); } static int gst_multi_socket_sink_client_get_fd (GstMultiHandleClient * client) { GstSocketClient *msclient = (GstSocketClient *) client; return g_socket_get_fd (msclient->socket); } /* "add-full" signal implementation */ void gst_multi_socket_sink_add_full (GstMultiSocketSink * sink, GSocket * socket, GstSyncMethod sync_method, GstFormat min_format, guint64 min_value, GstFormat max_format, guint64 max_value) { GstSocketClient *client; GstMultiHandleClient *mhclient; GList *clink; GstMultiHandleSink *mhsink = GST_MULTI_HANDLE_SINK (sink); GST_DEBUG_OBJECT (sink, "[socket %p] adding client, sync_method %d, " "min_format %d, min_value %" G_GUINT64_FORMAT ", max_format %d, max_value %" G_GUINT64_FORMAT, socket, sync_method, min_format, min_value, max_format, max_value); /* do limits check if we can */ if (min_format == max_format) { if (max_value != -1 && min_value != -1 && max_value < min_value) goto wrong_limits; } /* create client datastructure */ client = g_new0 (GstSocketClient, 1); mhclient = (GstMultiHandleClient *) client; gst_multi_handle_sink_client_init (mhclient, sync_method); g_snprintf (mhclient->debug, 30, "[socket %p]", socket); client->socket = G_SOCKET (g_object_ref (socket)); mhclient->burst_min_format = min_format; mhclient->burst_min_value = min_value; mhclient->burst_max_format = max_format; mhclient->burst_max_value = max_value; CLIENTS_LOCK (sink); /* check the hash to find a duplicate fd */ clink = g_hash_table_lookup (sink->socket_hash, socket); if (clink != NULL) goto duplicate; /* we can add the fd now */ clink = mhsink->clients = g_list_prepend (mhsink->clients, client); g_hash_table_insert (sink->socket_hash, socket, clink); mhsink->clients_cookie++; /* set the socket to non blocking */ g_socket_set_blocking (socket, FALSE); /* we always read from a client */ if (sink->main_context) { client->source = g_socket_create_source (client->socket, G_IO_IN | G_IO_OUT | G_IO_PRI | G_IO_ERR | G_IO_HUP, sink->cancellable); g_source_set_callback (client->source, (GSourceFunc) gst_multi_socket_sink_socket_condition, gst_object_ref (sink), (GDestroyNotify) gst_object_unref); g_source_attach (client->source, sink->main_context); } gst_multi_handle_sink_setup_dscp_client (mhsink, mhclient); CLIENTS_UNLOCK (sink); g_signal_emit (G_OBJECT (sink), gst_multi_socket_sink_signals[SIGNAL_CLIENT_ADDED], 0, socket); return; /* errors */ wrong_limits: { GST_WARNING_OBJECT (sink, "[socket %p] wrong values min =%" G_GUINT64_FORMAT ", max=%" G_GUINT64_FORMAT ", format %d specified when adding client", socket, min_value, max_value, min_format); return; } duplicate: { mhclient->status = GST_CLIENT_STATUS_DUPLICATE; CLIENTS_UNLOCK (sink); GST_WARNING_OBJECT (sink, "[socket %p] duplicate client found, refusing", socket); g_signal_emit (G_OBJECT (sink), gst_multi_socket_sink_signals[SIGNAL_CLIENT_REMOVED], 0, socket, mhclient->status); g_free (client); return; } } /* "add" signal implementation */ void gst_multi_socket_sink_add (GstMultiSocketSink * sink, GSocket * socket) { GstMultiHandleSink *mhsink; mhsink = GST_MULTI_HANDLE_SINK (sink); gst_multi_socket_sink_add_full (sink, socket, mhsink->def_sync_method, mhsink->def_burst_format, mhsink->def_burst_value, mhsink->def_burst_format, -1); } /* "remove" signal implementation */ void gst_multi_socket_sink_remove (GstMultiSocketSink * sink, GSocket * socket) { GList *clink; GstMultiHandleSink *mhsink = GST_MULTI_HANDLE_SINK (sink); GstMultiHandleSinkClass *mhsinkclass = GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink); GST_DEBUG_OBJECT (sink, "[socket %p] removing client", socket); CLIENTS_LOCK (sink); clink = g_hash_table_lookup (sink->socket_hash, socket); if (clink != NULL) { GstSocketClient *client = clink->data; GstMultiHandleClient *mhclient = (GstMultiHandleClient *) client; if (mhclient->status != GST_CLIENT_STATUS_OK) { GST_INFO_OBJECT (sink, "[socket %p] Client already disconnecting with status %d", socket, mhclient->status); goto done; } mhclient->status = GST_CLIENT_STATUS_REMOVED; mhsinkclass->remove_client_link (GST_MULTI_HANDLE_SINK (sink), clink); } else { GST_WARNING_OBJECT (sink, "[socket %p] no client with this socket found!", socket); } done: CLIENTS_UNLOCK (sink); } /* "remove-flush" signal implementation */ void gst_multi_socket_sink_remove_flush (GstMultiSocketSink * sink, GSocket * socket) { GList *clink; GST_DEBUG_OBJECT (sink, "[socket %p] flushing client", socket); CLIENTS_LOCK (sink); clink = g_hash_table_lookup (sink->socket_hash, socket); if (clink != NULL) { GstSocketClient *client = clink->data; GstMultiHandleClient *mhclient = (GstMultiHandleClient *) client; if (mhclient->status != GST_CLIENT_STATUS_OK) { GST_INFO_OBJECT (sink, "[socket %p] Client already disconnecting with status %d", socket, mhclient->status); goto done; } /* take the position of the client as the number of buffers left to flush. * If the client was at position -1, we flush 0 buffers, 0 == flush 1 * buffer, etc... */ mhclient->flushcount = mhclient->bufpos + 1; /* mark client as flushing. We can not remove the client right away because * it might have some buffers to flush in the ->sending queue. */ mhclient->status = GST_CLIENT_STATUS_FLUSHING; } else { GST_WARNING_OBJECT (sink, "[socket %p] no client with this fd found!", socket); } done: CLIENTS_UNLOCK (sink); } /* "get-stats" signal implementation */ GstStructure * gst_multi_socket_sink_get_stats (GstMultiSocketSink * sink, GSocket * socket) { GstSocketClient *client; GstStructure *result = NULL; GList *clink; CLIENTS_LOCK (sink); clink = g_hash_table_lookup (sink->socket_hash, socket); if (clink == NULL) goto noclient; client = clink->data; if (client != NULL) { GstMultiHandleClient *mhclient = (GstMultiHandleClient *) client; guint64 interval; result = gst_structure_new_empty ("multisocketsink-stats"); if (mhclient->disconnect_time == 0) { GTimeVal nowtv; g_get_current_time (&nowtv); interval = GST_TIMEVAL_TO_TIME (nowtv) - mhclient->connect_time; } else { interval = mhclient->disconnect_time - mhclient->connect_time; } gst_structure_set (result, "bytes-sent", G_TYPE_UINT64, mhclient->bytes_sent, "connect-time", G_TYPE_UINT64, mhclient->connect_time, "disconnect-time", G_TYPE_UINT64, mhclient->disconnect_time, "connected-duration", G_TYPE_UINT64, interval, "last-activatity-time", G_TYPE_UINT64, mhclient->last_activity_time, "dropped-buffers", G_TYPE_UINT64, mhclient->dropped_buffers, "first-buffer-ts", G_TYPE_UINT64, mhclient->first_buffer_ts, "last-buffer-ts", G_TYPE_UINT64, mhclient->last_buffer_ts, NULL); } noclient: CLIENTS_UNLOCK (sink); /* python doesn't like a NULL pointer yet */ if (result == NULL) { GST_WARNING_OBJECT (sink, "[socket %p] no client with this found!", socket); result = gst_structure_new_empty ("multisocketsink-stats"); } return result; } /* should be called with the clientslock helt. * Note that we don't close the fd as we didn't open it in the first * place. An application should connect to the client-fd-removed signal and * close the fd itself. */ static void gst_multi_socket_sink_remove_client_link (GstMultiHandleSink * sink, GList * link) { GSocket *socket; GTimeVal now; GstSocketClient *client = link->data; GstMultiHandleClient *mhclient = (GstMultiHandleClient *) client; GstMultiSocketSink *mssink = GST_MULTI_SOCKET_SINK (sink); GstMultiSocketSinkClass *fclass; fclass = GST_MULTI_SOCKET_SINK_GET_CLASS (sink); socket = client->socket; if (mhclient->currently_removing) { GST_WARNING_OBJECT (sink, "%s client is already being removed", mhclient->debug); return; } else { mhclient->currently_removing = TRUE; } /* FIXME: if we keep track of ip we can log it here and signal */ switch (mhclient->status) { case GST_CLIENT_STATUS_OK: GST_WARNING_OBJECT (sink, "%s removing client %p for no reason", mhclient->debug, client); break; case GST_CLIENT_STATUS_CLOSED: GST_DEBUG_OBJECT (sink, "%s removing client %p because of close", mhclient->debug, client); break; case GST_CLIENT_STATUS_REMOVED: GST_DEBUG_OBJECT (sink, "%s removing client %p because the app removed it", mhclient->debug, client); break; case GST_CLIENT_STATUS_SLOW: GST_INFO_OBJECT (sink, "%s removing client %p because it was too slow", mhclient->debug, client); break; case GST_CLIENT_STATUS_ERROR: GST_WARNING_OBJECT (sink, "%s removing client %p because of error", mhclient->debug, client); break; case GST_CLIENT_STATUS_FLUSHING: default: GST_WARNING_OBJECT (sink, "%s removing client %p with invalid reason %d", mhclient->debug, client, mhclient->status); break; } if (client->source) { g_source_destroy (client->source); g_source_unref (client->source); client->source = NULL; } g_get_current_time (&now); mhclient->disconnect_time = GST_TIMEVAL_TO_TIME (now); /* free client buffers */ g_slist_foreach (mhclient->sending, (GFunc) gst_mini_object_unref, NULL); g_slist_free (mhclient->sending); mhclient->sending = NULL; if (mhclient->caps) gst_caps_unref (mhclient->caps); mhclient->caps = NULL; /* unlock the mutex before signaling because the signal handler * might query some properties */ CLIENTS_UNLOCK (sink); g_signal_emit (G_OBJECT (sink), gst_multi_socket_sink_signals[SIGNAL_CLIENT_REMOVED], 0, socket, mhclient->status); /* lock again before we remove the client completely */ CLIENTS_LOCK (sink); /* fd cannot be reused in the above signal callback so we can safely * remove it from the hashtable here */ if (!g_hash_table_remove (mssink->socket_hash, socket)) { GST_WARNING_OBJECT (sink, "[socket %p] error removing client %p from hash", socket, client); } /* after releasing the lock above, the link could be invalid, more * precisely, the next and prev pointers could point to invalid list * links. One optimisation could be to add a cookie to the linked list * and take a shortcut when it did not change between unlocking and locking * our mutex. For now we just walk the list again. */ sink->clients = g_list_remove (sink->clients, client); sink->clients_cookie++; if (fclass->removed) fclass->removed (mssink, socket); g_free (client); CLIENTS_UNLOCK (sink); /* and the fd is really gone now */ g_signal_emit (G_OBJECT (sink), gst_multi_socket_sink_signals[SIGNAL_CLIENT_SOCKET_REMOVED], 0, socket); g_object_unref (socket); CLIENTS_LOCK (sink); } /* handle a read on a client socket, * which either indicates a close or should be ignored * returns FALSE if some error occured or the client closed. */ static gboolean gst_multi_socket_sink_handle_client_read (GstMultiSocketSink * sink, GstSocketClient * client) { gboolean ret; gchar dummy[256]; gssize nread; GError *err = NULL; gboolean first = TRUE; GstMultiHandleClient *mhclient = (GstMultiHandleClient *) client; GST_DEBUG_OBJECT (sink, "[socket %p] select reports client read", client->socket); ret = TRUE; /* just Read 'n' Drop, could also just drop the client as it's not supposed * to write to us except for closing the socket, I guess it's because we * like to listen to our customers. */ do { gssize navail; GST_DEBUG_OBJECT (sink, "[socket %p] client wants us to read", client->socket); navail = g_socket_get_available_bytes (client->socket); if (navail < 0) break; nread = g_socket_receive (client->socket, dummy, MIN (navail, sizeof (dummy)), sink->cancellable, &err); if (first && nread == 0) { /* client sent close, so remove it */ GST_DEBUG_OBJECT (sink, "[socket %p] client asked for close, removing", client->socket); mhclient->status = GST_CLIENT_STATUS_CLOSED; ret = FALSE; } else if (nread < 0) { GST_WARNING_OBJECT (sink, "[socket %p] could not read: %s", client->socket, err->message); mhclient->status = GST_CLIENT_STATUS_ERROR; ret = FALSE; break; } first = FALSE; } while (nread > 0); g_clear_error (&err); return ret; } /* queue the given buffer for the given client */ static gboolean gst_multi_socket_sink_client_queue_buffer (GstMultiHandleSink * mhsink, GstMultiHandleClient * mhclient, GstBuffer * buffer) { GstSocketClient *client = (GstSocketClient *) mhclient; GstMultiSocketSink *sink = GST_MULTI_SOCKET_SINK (mhsink); GstCaps *caps; /* TRUE: send them if the new caps have them */ gboolean send_streamheader = FALSE; GstStructure *s; /* before we queue the buffer, we check if we need to queue streamheader * buffers (because it's a new client, or because they changed) */ caps = gst_pad_get_current_caps (GST_BASE_SINK_PAD (sink)); if (!mhclient->caps) { GST_DEBUG_OBJECT (sink, "[socket %p] no previous caps for this client, send streamheader", client->socket); send_streamheader = TRUE; mhclient->caps = gst_caps_ref (caps); } else { /* there were previous caps recorded, so compare */ if (!gst_caps_is_equal (caps, mhclient->caps)) { const GValue *sh1, *sh2; /* caps are not equal, but could still have the same streamheader */ s = gst_caps_get_structure (caps, 0); if (!gst_structure_has_field (s, "streamheader")) { /* no new streamheader, so nothing new to send */ GST_DEBUG_OBJECT (sink, "[socket %p] new caps do not have streamheader, not sending", client->socket); } else { /* there is a new streamheader */ s = gst_caps_get_structure (mhclient->caps, 0); if (!gst_structure_has_field (s, "streamheader")) { /* no previous streamheader, so send the new one */ GST_DEBUG_OBJECT (sink, "[socket %p] previous caps did not have streamheader, sending", client->socket); send_streamheader = TRUE; } else { /* both old and new caps have streamheader set */ if (!mhsink->resend_streamheader) { GST_DEBUG_OBJECT (sink, "[socket %p] asked to not resend the streamheader, not sending", client->socket); send_streamheader = FALSE; } else { sh1 = gst_structure_get_value (s, "streamheader"); s = gst_caps_get_structure (caps, 0); sh2 = gst_structure_get_value (s, "streamheader"); if (gst_value_compare (sh1, sh2) != GST_VALUE_EQUAL) { GST_DEBUG_OBJECT (sink, "[socket %p] new streamheader different from old, sending", client->socket); send_streamheader = TRUE; } } } } } /* Replace the old caps */ gst_caps_unref (mhclient->caps); mhclient->caps = gst_caps_ref (caps); } if (G_UNLIKELY (send_streamheader)) { const GValue *sh; GArray *buffers; int i; GST_LOG_OBJECT (sink, "[socket %p] sending streamheader from caps %" GST_PTR_FORMAT, client->socket, caps); s = gst_caps_get_structure (caps, 0); if (!gst_structure_has_field (s, "streamheader")) { GST_DEBUG_OBJECT (sink, "[socket %p] no new streamheader, so nothing to send", client->socket); } else { GST_LOG_OBJECT (sink, "[socket %p] sending streamheader from caps %" GST_PTR_FORMAT, client->socket, caps); sh = gst_structure_get_value (s, "streamheader"); g_assert (G_VALUE_TYPE (sh) == GST_TYPE_ARRAY); buffers = g_value_peek_pointer (sh); GST_DEBUG_OBJECT (sink, "%d streamheader buffers", buffers->len); for (i = 0; i < buffers->len; ++i) { GValue *bufval; GstBuffer *buffer; bufval = &g_array_index (buffers, GValue, i); g_assert (G_VALUE_TYPE (bufval) == GST_TYPE_BUFFER); buffer = g_value_peek_pointer (bufval); GST_DEBUG_OBJECT (sink, "[socket %p] queueing streamheader buffer of length %" G_GSIZE_FORMAT, client->socket, gst_buffer_get_size (buffer)); gst_buffer_ref (buffer); mhclient->sending = g_slist_append (mhclient->sending, buffer); } } } gst_caps_unref (caps); caps = NULL; GST_LOG_OBJECT (sink, "[socket %p] queueing buffer of length %" G_GSIZE_FORMAT, client->socket, gst_buffer_get_size (buffer)); gst_buffer_ref (buffer); mhclient->sending = g_slist_append (mhclient->sending, buffer); return TRUE; } /* Handle a write on a client, * which indicates a read request from a client. * * For each client we maintain a queue of GstBuffers that contain the raw bytes * we need to send to the client. * * We first check to see if we need to send streamheaders. If so, we queue them. * * Then we run into the main loop that tries to send as many buffers as * possible. It will first exhaust the mhclient->sending queue and if the queue * is empty, it will pick a buffer from the global queue. * * Sending the buffers from the mhclient->sending queue is basically writing * the bytes to the socket and maintaining a count of the bytes that were * sent. When the buffer is completely sent, it is removed from the * mhclient->sending queue and we try to pick a new buffer for sending. * * When the sending returns a partial buffer we stop sending more data as * the next send operation could block. * * This functions returns FALSE if some error occured. */ static gboolean gst_multi_socket_sink_handle_client_write (GstMultiSocketSink * sink, GstSocketClient * client) { GSocket *socket = client->socket; gboolean more; gboolean flushing; GstClockTime now; GTimeVal nowtv; GError *err = NULL; GstMultiHandleSink *mhsink = GST_MULTI_HANDLE_SINK (sink); GstMultiHandleClient *mhclient = (GstMultiHandleClient *) client; GstMultiHandleSinkClass *mhsinkclass = GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink); g_get_current_time (&nowtv); now = GST_TIMEVAL_TO_TIME (nowtv); flushing = mhclient->status == GST_CLIENT_STATUS_FLUSHING; more = TRUE; do { gint maxsize; if (!mhclient->sending) { /* client is not working on a buffer */ if (mhclient->bufpos == -1) { /* client is too fast, remove from write queue until new buffer is * available */ // FIXME: specific if (client->source) { g_source_destroy (client->source); g_source_unref (client->source); client->source = NULL; } // /* if we flushed out all of the client buffers, we can stop */ if (mhclient->flushcount == 0) goto flushed; return TRUE; } else { /* client can pick a buffer from the global queue */ GstBuffer *buf; GstClockTime timestamp; /* for new connections, we need to find a good spot in the * bufqueue to start streaming from */ if (mhclient->new_connection && !flushing) { gint position = gst_multi_handle_sink_new_client (mhsink, mhclient); if (position >= 0) { /* we got a valid spot in the queue */ mhclient->new_connection = FALSE; mhclient->bufpos = position; } else { /* cannot send data to this client yet */ // FIXME: specific if (client->source) { g_source_destroy (client->source); g_source_unref (client->source); client->source = NULL; } // return TRUE; } } /* we flushed all remaining buffers, no need to get a new one */ if (mhclient->flushcount == 0) goto flushed; /* grab buffer */ buf = g_array_index (mhsink->bufqueue, GstBuffer *, mhclient->bufpos); mhclient->bufpos--; /* update stats */ timestamp = GST_BUFFER_TIMESTAMP (buf); if (mhclient->first_buffer_ts == GST_CLOCK_TIME_NONE) mhclient->first_buffer_ts = timestamp; if (timestamp != -1) mhclient->last_buffer_ts = timestamp; /* decrease flushcount */ if (mhclient->flushcount != -1) mhclient->flushcount--; GST_LOG_OBJECT (sink, "[socket %p] client %p at position %d", socket, client, mhclient->bufpos); /* queueing a buffer will ref it */ mhsinkclass->client_queue_buffer (mhsink, mhclient, buf); /* need to start from the first byte for this new buffer */ mhclient->bufoffset = 0; } } /* see if we need to send something */ if (mhclient->sending) { gssize wrote; GstBuffer *head; GstMapInfo map; /* pick first buffer from list */ head = GST_BUFFER (mhclient->sending->data); gst_buffer_map (head, &map, GST_MAP_READ); maxsize = map.size - mhclient->bufoffset; // FIXME: specific /* try to write the complete buffer */ wrote = g_socket_send (socket, (gchar *) map.data + mhclient->bufoffset, maxsize, sink->cancellable, &err); gst_buffer_unmap (head, &map); if (wrote < 0) { /* hmm error.. */ if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_CLOSED)) { goto connection_reset; } else { goto write_error; } } else { if (wrote < maxsize) { /* partial write means that the client cannot read more and we should * stop sending more */ GST_LOG_OBJECT (sink, "partial write on %p of %" G_GSSIZE_FORMAT " bytes", socket, wrote); mhclient->bufoffset += wrote; more = FALSE; } else { /* complete buffer was written, we can proceed to the next one */ mhclient->sending = g_slist_remove (mhclient->sending, head); gst_buffer_unref (head); /* make sure we start from byte 0 for the next buffer */ mhclient->bufoffset = 0; } /* update stats */ mhclient->bytes_sent += wrote; mhclient->last_activity_time = now; mhsink->bytes_served += wrote; } } } while (more); return TRUE; /* ERRORS */ flushed: { GST_DEBUG_OBJECT (sink, "[socket %p] flushed, removing", socket); mhclient->status = GST_CLIENT_STATUS_REMOVED; return FALSE; } connection_reset: { GST_DEBUG_OBJECT (sink, "[socket %p] connection reset by peer, removing", socket); mhclient->status = GST_CLIENT_STATUS_CLOSED; g_clear_error (&err); return FALSE; } write_error: { GST_WARNING_OBJECT (sink, "[socket %p] could not write, removing client: %s", socket, err->message); g_clear_error (&err); mhclient->status = GST_CLIENT_STATUS_ERROR; return FALSE; } } /* Queue a buffer on the global queue. * * This function adds the buffer to the front of a GArray. It removes the * tail buffer if the max queue size is exceeded, unreffing the queued buffer. * Note that unreffing the buffer is not a problem as clients who * started writing out this buffer will still have a reference to it in the * mhclient->sending queue. * * After adding the buffer, we update all client positions in the queue. If * a client moves over the soft max, we start the recovery procedure for this * slow client. If it goes over the hard max, it is put into the slow list * and removed. * * Special care is taken of clients that were waiting for a new buffer (they * had a position of -1) because they can proceed after adding this new buffer. * This is done by adding the client back into the write fd_set and signaling * the select thread that the fd_set changed. */ static void gst_multi_socket_sink_queue_buffer (GstMultiHandleSink * mhsink, GstBuffer * buf) { GList *clients, *next; gint queuelen; gint max_buffer_usage; gint i; GTimeVal nowtv; GstClockTime now; gint max_buffers, soft_max_buffers; guint cookie; GstMultiSocketSink *sink = GST_MULTI_SOCKET_SINK (mhsink); GstMultiHandleSinkClass *mhsinkclass = GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink); g_get_current_time (&nowtv); now = GST_TIMEVAL_TO_TIME (nowtv); CLIENTS_LOCK (sink); /* add buffer to queue */ gst_buffer_ref (buf); g_array_prepend_val (mhsink->bufqueue, buf); queuelen = mhsink->bufqueue->len; if (mhsink->units_max > 0) max_buffers = get_buffers_max (mhsink, mhsink->units_max); else max_buffers = -1; if (mhsink->units_soft_max > 0) soft_max_buffers = get_buffers_max (mhsink, mhsink->units_soft_max); else soft_max_buffers = -1; GST_LOG_OBJECT (sink, "Using max %d, softmax %d", max_buffers, soft_max_buffers); /* then loop over the clients and update the positions */ max_buffer_usage = 0; restart: cookie = mhsink->clients_cookie; for (clients = mhsink->clients; clients; clients = next) { GstSocketClient *client; GstMultiHandleClient *mhclient; if (cookie != mhsink->clients_cookie) { GST_DEBUG_OBJECT (sink, "Clients cookie outdated, restarting"); goto restart; } client = clients->data; mhclient = (GstMultiHandleClient *) client; next = g_list_next (clients); mhclient->bufpos++; GST_LOG_OBJECT (sink, "[socket %p] client %p at position %d", client->socket, client, mhclient->bufpos); /* check soft max if needed, recover client */ if (soft_max_buffers > 0 && mhclient->bufpos >= soft_max_buffers) { gint newpos; newpos = gst_multi_handle_sink_recover_client (mhsink, mhclient); if (newpos != mhclient->bufpos) { mhclient->dropped_buffers += mhclient->bufpos - newpos; mhclient->bufpos = newpos; mhclient->discont = TRUE; GST_INFO_OBJECT (sink, "[socket %p] client %p position reset to %d", client->socket, client, mhclient->bufpos); } else { GST_INFO_OBJECT (sink, "[socket %p] client %p not recovering position", client->socket, client); } } /* check hard max and timeout, remove client */ if ((max_buffers > 0 && mhclient->bufpos >= max_buffers) || (mhsink->timeout > 0 && now - mhclient->last_activity_time > mhsink->timeout)) { /* remove client */ GST_WARNING_OBJECT (sink, "[socket %p] client %p is too slow, removing", client->socket, client); /* remove the client, the fd set will be cleared and the select thread * will be signaled */ mhclient->status = GST_CLIENT_STATUS_SLOW; /* set client to invalid position while being removed */ mhclient->bufpos = -1; mhsinkclass->remove_client_link (mhsink, clients); continue; } else if (mhclient->bufpos == 0 || mhclient->new_connection) { /* can send data to this client now. need to signal the select thread that * the fd_set changed */ if (!client->source) { client->source = g_socket_create_source (client->socket, G_IO_IN | G_IO_OUT | G_IO_PRI | G_IO_ERR | G_IO_HUP, sink->cancellable); g_source_set_callback (client->source, (GSourceFunc) gst_multi_socket_sink_socket_condition, gst_object_ref (sink), (GDestroyNotify) gst_object_unref); g_source_attach (client->source, sink->main_context); } } /* keep track of maximum buffer usage */ if (mhclient->bufpos > max_buffer_usage) { max_buffer_usage = mhclient->bufpos; } } /* make sure we respect bytes-min, buffers-min and time-min when they are set */ { gint usage, max; GST_LOG_OBJECT (sink, "extending queue %d to respect time_min %" GST_TIME_FORMAT ", bytes_min %d, buffers_min %d", max_buffer_usage, GST_TIME_ARGS (mhsink->time_min), mhsink->bytes_min, mhsink->buffers_min); /* get index where the limits are ok, we don't really care if all limits * are ok, we just queue as much as we need. We also don't compare against * the max limits. */ find_limits (mhsink, &usage, mhsink->bytes_min, mhsink->buffers_min, mhsink->time_min, &max, -1, -1, -1); max_buffer_usage = MAX (max_buffer_usage, usage + 1); GST_LOG_OBJECT (sink, "extended queue to %d", max_buffer_usage); } /* now look for sync points and make sure there is at least one * sync point in the queue. We only do this if the LATEST_KEYFRAME or * BURST_KEYFRAME mode is selected */ if (mhsink->def_sync_method == GST_SYNC_METHOD_LATEST_KEYFRAME || mhsink->def_sync_method == GST_SYNC_METHOD_BURST_KEYFRAME) { /* no point in searching beyond the queue length */ gint limit = queuelen; GstBuffer *buf; /* no point in searching beyond the soft-max if any. */ if (soft_max_buffers > 0) { limit = MIN (limit, soft_max_buffers); } GST_LOG_OBJECT (sink, "extending queue to include sync point, now at %d, limit is %d", max_buffer_usage, limit); for (i = 0; i < limit; i++) { buf = g_array_index (mhsink->bufqueue, GstBuffer *, i); if (is_sync_frame (mhsink, buf)) { /* found a sync frame, now extend the buffer usage to * include at least this frame. */ max_buffer_usage = MAX (max_buffer_usage, i); break; } } GST_LOG_OBJECT (sink, "max buffer usage is now %d", max_buffer_usage); } GST_LOG_OBJECT (sink, "len %d, usage %d", queuelen, max_buffer_usage); /* nobody is referencing units after max_buffer_usage so we can * remove them from the queue. We remove them in reverse order as * this is the most optimal for GArray. */ for (i = queuelen - 1; i > max_buffer_usage; i--) { GstBuffer *old; /* queue exceeded max size */ queuelen--; old = g_array_index (mhsink->bufqueue, GstBuffer *, i); mhsink->bufqueue = g_array_remove_index (mhsink->bufqueue, i); /* unref tail buffer */ gst_buffer_unref (old); } /* save for stats */ mhsink->buffers_queued = max_buffer_usage; CLIENTS_UNLOCK (sink); } /* Handle the clients. This is called when a socket becomes ready * to read or writable. Badly behaving clients are put on a * garbage list and removed. */ static gboolean gst_multi_socket_sink_socket_condition (GSocket * socket, GIOCondition condition, GstMultiSocketSink * sink) { GList *clink; GstSocketClient *client; gboolean ret = TRUE; GstMultiHandleClient *mhclient; GstMultiHandleSink *mhsink = GST_MULTI_HANDLE_SINK (sink); GstMultiHandleSinkClass *mhsinkclass = GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink); CLIENTS_LOCK (sink); clink = g_hash_table_lookup (sink->socket_hash, socket); if (clink == NULL) { ret = FALSE; goto done; } client = clink->data; mhclient = (GstMultiHandleClient *) client; if (mhclient->status != GST_CLIENT_STATUS_FLUSHING && mhclient->status != GST_CLIENT_STATUS_OK) { mhsinkclass->remove_client_link (mhsink, clink); ret = FALSE; goto done; } if ((condition & G_IO_ERR)) { GST_WARNING_OBJECT (sink, "Socket %p has error", client->socket); mhclient->status = GST_CLIENT_STATUS_ERROR; mhsinkclass->remove_client_link (mhsink, clink); ret = FALSE; goto done; } else if ((condition & G_IO_HUP)) { mhclient->status = GST_CLIENT_STATUS_CLOSED; mhsinkclass->remove_client_link (mhsink, clink); ret = FALSE; goto done; } else if ((condition & G_IO_IN) || (condition & G_IO_PRI)) { /* handle client read */ if (!gst_multi_socket_sink_handle_client_read (sink, client)) { mhsinkclass->remove_client_link (mhsink, clink); ret = FALSE; goto done; } } else if ((condition & G_IO_OUT)) { /* handle client write */ if (!gst_multi_socket_sink_handle_client_write (sink, client)) { mhsinkclass->remove_client_link (mhsink, clink); ret = FALSE; goto done; } } done: CLIENTS_UNLOCK (sink); return ret; } static gboolean gst_multi_socket_sink_timeout (GstMultiSocketSink * sink) { GstClockTime now; GTimeVal nowtv; GList *clients; GstMultiHandleSink *mhsink = GST_MULTI_HANDLE_SINK (sink); GstMultiHandleSinkClass *mhsinkclass = GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink); g_get_current_time (&nowtv); now = GST_TIMEVAL_TO_TIME (nowtv); CLIENTS_LOCK (sink); for (clients = mhsink->clients; clients; clients = clients->next) { GstSocketClient *client; GstMultiHandleClient *mhclient; client = clients->data; mhclient = (GstMultiHandleClient *) client; if (mhsink->timeout > 0 && now - mhclient->last_activity_time > mhsink->timeout) { mhclient->status = GST_CLIENT_STATUS_SLOW; mhsinkclass->remove_client_link (mhsink, clients); } } CLIENTS_UNLOCK (sink); return FALSE; } /* we handle the client communication in another thread so that we do not block * the gstreamer thread while we select() on the client fds */ static gpointer gst_multi_socket_sink_thread (GstMultiHandleSink * mhsink) { GstMultiSocketSink *sink = GST_MULTI_SOCKET_SINK (mhsink); GSource *timeout = NULL; while (mhsink->running) { if (mhsink->timeout > 0) { timeout = g_timeout_source_new (mhsink->timeout / GST_MSECOND); g_source_set_callback (timeout, (GSourceFunc) gst_multi_socket_sink_timeout, gst_object_ref (sink), (GDestroyNotify) gst_object_unref); g_source_attach (timeout, sink->main_context); } /* Returns after handling all pending events or when * _wakeup() was called. In any case we have to add * a new timeout because something happened. */ g_main_context_iteration (sink->main_context, TRUE); if (timeout) { g_source_destroy (timeout); g_source_unref (timeout); } } return NULL; } static void gst_multi_socket_sink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { switch (prop_id) { default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_multi_socket_sink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstMultiSocketSink *multisocketsink; multisocketsink = GST_MULTI_SOCKET_SINK (object); switch (prop_id) { case PROP_NUM_SOCKETS: g_value_set_uint (value, g_hash_table_size (multisocketsink->socket_hash)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static gboolean gst_multi_socket_sink_start_pre (GstMultiHandleSink * mhsink) { GstMultiSocketSink *mssink = GST_MULTI_SOCKET_SINK (mhsink); GList *clients; GST_INFO_OBJECT (mssink, "starting"); mssink->main_context = g_main_context_new (); CLIENTS_LOCK (mssink); for (clients = mhsink->clients; clients; clients = clients->next) { GstSocketClient *client; client = clients->data; if (client->source) continue; client->source = g_socket_create_source (client->socket, G_IO_IN | G_IO_OUT | G_IO_PRI | G_IO_ERR | G_IO_HUP, mssink->cancellable); g_source_set_callback (client->source, (GSourceFunc) gst_multi_socket_sink_socket_condition, gst_object_ref (mssink), (GDestroyNotify) gst_object_unref); g_source_attach (client->source, mssink->main_context); } CLIENTS_UNLOCK (mssink); return TRUE; } static gboolean multisocketsink_hash_remove (gpointer key, gpointer value, gpointer data) { return TRUE; } static void gst_multi_socket_sink_stop_pre (GstMultiHandleSink * mhsink) { GstMultiSocketSink *mssink = GST_MULTI_SOCKET_SINK (mhsink); if (mssink->main_context) g_main_context_wakeup (mssink->main_context); } static void gst_multi_socket_sink_stop_post (GstMultiHandleSink * mhsink) { GstMultiSocketSink *mssink = GST_MULTI_SOCKET_SINK (mhsink); if (mssink->main_context) { g_main_context_unref (mssink->main_context); mssink->main_context = NULL; } g_hash_table_foreach_remove (mssink->socket_hash, multisocketsink_hash_remove, mssink); } static gboolean gst_multi_socket_sink_unlock (GstBaseSink * bsink) { GstMultiSocketSink *sink; sink = GST_MULTI_SOCKET_SINK (bsink); GST_DEBUG_OBJECT (sink, "set to flushing"); g_cancellable_cancel (sink->cancellable); if (sink->main_context) g_main_context_wakeup (sink->main_context); return TRUE; } /* will be called only between calls to start() and stop() */ static gboolean gst_multi_socket_sink_unlock_stop (GstBaseSink * bsink) { GstMultiSocketSink *sink; sink = GST_MULTI_SOCKET_SINK (bsink); GST_DEBUG_OBJECT (sink, "unset flushing"); g_cancellable_reset (sink->cancellable); return TRUE; }