/* GStreamer * Copyright (C) <1999> Erik Walthinsen * Copyright (C) <2004> Thomas Vander Stichele * * 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-multifdsink * @see_also: tcpserversink */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include #include #include #ifdef HAVE_FIONREAD_IN_SYS_FILIO #include #endif #include "gstmultifdsink.h" #include "gsttcp-marshal.h" #define NOT_IMPLEMENTED 0 /* the select call is also performed on the control sockets, that way * we can send special commands to unblock or restart the select call */ #define CONTROL_RESTART 'R' /* restart the select call */ #define CONTROL_STOP 'S' /* stop the select call */ #define CONTROL_SOCKETS(sink) sink->control_sock #define WRITE_SOCKET(sink) sink->control_sock[1] #define READ_SOCKET(sink) sink->control_sock[0] #define SEND_COMMAND(sink, command) \ G_STMT_START { \ unsigned char c; c = command; \ write (WRITE_SOCKET(sink).fd, &c, 1); \ } G_STMT_END #define READ_COMMAND(sink, command, res) \ G_STMT_START { \ res = read(READ_SOCKET(sink).fd, &command, 1); \ } G_STMT_END /* elementfactory information */ static GstElementDetails gst_multi_fd_sink_details = GST_ELEMENT_DETAILS ("MultiFd sink", "Sink/Network", "Send data to multiple filedescriptors", "Thomas Vander Stichele , " "Wim Taymans "); static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS_ANY); GST_DEBUG_CATEGORY (multifdsink_debug); #define GST_CAT_DEFAULT (multifdsink_debug) /* MultiFdSink signals and args */ enum { /* methods */ SIGNAL_ADD, SIGNAL_REMOVE, SIGNAL_CLEAR, SIGNAL_GET_STATS, /* signals */ SIGNAL_CLIENT_ADDED, SIGNAL_CLIENT_REMOVED, LAST_SIGNAL }; /* this is really arbitrarily chosen */ #define DEFAULT_PROTOCOL GST_TCP_PROTOCOL_NONE #define DEFAULT_MODE GST_FDSET_MODE_POLL #define DEFAULT_BUFFERS_MAX -1 #define DEFAULT_BUFFERS_SOFT_MAX -1 #define DEFAULT_UNIT_TYPE GST_UNIT_TYPE_BUFFERS #define DEFAULT_UNITS_MAX -1 #define DEFAULT_UNITS_SOFT_MAX -1 #define DEFAULT_RECOVER_POLICY GST_RECOVER_POLICY_NONE #define DEFAULT_TIMEOUT 0 #define DEFAULT_SYNC_METHOD GST_SYNC_METHOD_LATEST enum { ARG_0, ARG_PROTOCOL, ARG_MODE, ARG_BUFFERS_QUEUED, ARG_BYTES_QUEUED, ARG_TIME_QUEUED, ARG_UNIT_TYPE, ARG_UNITS_MAX, ARG_UNITS_SOFT_MAX, ARG_BUFFERS_MAX, ARG_BUFFERS_SOFT_MAX, ARG_RECOVER_POLICY, ARG_TIMEOUT, ARG_SYNC_METHOD, ARG_BYTES_TO_SERVE, ARG_BYTES_SERVED, }; #define GST_TYPE_RECOVER_POLICY (gst_recover_policy_get_type()) static GType gst_recover_policy_get_type (void) { static GType recover_policy_type = 0; static GEnumValue recover_policy[] = { {GST_RECOVER_POLICY_NONE, "Do not try to recover", "none"}, {GST_RECOVER_POLICY_RESYNC_LATEST, "Resync client to latest buffer", "latest"}, {GST_RECOVER_POLICY_RESYNC_SOFT_LIMIT, "Resync client to soft limit", "soft-limit"}, {GST_RECOVER_POLICY_RESYNC_KEYFRAME, "Resync client to most recent keyframe", "keyframe"}, {0, NULL, NULL}, }; if (!recover_policy_type) { recover_policy_type = g_enum_register_static ("GstRecoverPolicy", recover_policy); } return recover_policy_type; } #define GST_TYPE_SYNC_METHOD (gst_sync_method_get_type()) static GType gst_sync_method_get_type (void) { static GType sync_method_type = 0; static GEnumValue sync_method[] = { {GST_SYNC_METHOD_LATEST, "Serve starting from the latest buffer", "latest"}, {GST_SYNC_METHOD_NEXT_KEYFRAME, "Serve starting from the next keyframe", "next-keyframe"}, {GST_SYNC_METHOD_LATEST_KEYFRAME, "Serve everything since the latest keyframe (burst)", "latest-keyframe"}, {0, NULL, NULL}, }; if (!sync_method_type) { sync_method_type = g_enum_register_static ("GstSyncMethod", sync_method); } return sync_method_type; } #if NOT_IMPLEMENTED #define GST_TYPE_UNIT_TYPE (gst_unit_type_get_type()) static GType gst_unit_type_get_type (void) { static GType unit_type_type = 0; static GEnumValue unit_type[] = { {GST_UNIT_TYPE_BUFFERS, "Buffers", "buffers"}, {GST_UNIT_TYPE_BYTES, "Bytes", "bytes"}, {GST_UNIT_TYPE_TIME, "Time", "time"}, {0, NULL, NULL}, }; if (!unit_type_type) { unit_type_type = g_enum_register_static ("GstTCPUnitType", unit_type); } return unit_type_type; } #endif #define GST_TYPE_CLIENT_STATUS (gst_client_status_get_type()) static GType gst_client_status_get_type (void) { static GType client_status_type = 0; static GEnumValue client_status[] = { {GST_CLIENT_STATUS_OK, "ok"}, {GST_CLIENT_STATUS_CLOSED, "Closed", "closed"}, {GST_CLIENT_STATUS_REMOVED, "Removed", "removed"}, {GST_CLIENT_STATUS_SLOW, "Too slow", "slow"}, {GST_CLIENT_STATUS_ERROR, "Error", "error"}, {GST_CLIENT_STATUS_DUPLICATE, "Duplicate", "duplicate"}, {0, NULL, NULL}, }; if (!client_status_type) { client_status_type = g_enum_register_static ("GstClientStatus", client_status); } return client_status_type; } static void gst_multi_fd_sink_finalize (GObject * object); static void gst_multi_fd_sink_remove_client_link (GstMultiFdSink * sink, GList * link); static GstFlowReturn gst_multi_fd_sink_render (GstBaseSink * bsink, GstBuffer * buf); static GstStateChangeReturn gst_multi_fd_sink_change_state (GstElement * element, GstStateChange transition); static void gst_multi_fd_sink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_multi_fd_sink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); GST_BOILERPLATE (GstMultiFdSink, gst_multi_fd_sink, GstBaseSink, GST_TYPE_BASE_SINK); static guint gst_multi_fd_sink_signals[LAST_SIGNAL] = { 0 }; static void gst_multi_fd_sink_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 (&sinktemplate)); gst_element_class_set_details (element_class, &gst_multi_fd_sink_details); } static void gst_multi_fd_sink_class_init (GstMultiFdSinkClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; GstBaseSinkClass *gstbasesink_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gstbasesink_class = (GstBaseSinkClass *) klass; gobject_class->set_property = gst_multi_fd_sink_set_property; gobject_class->get_property = gst_multi_fd_sink_get_property; gobject_class->finalize = gst_multi_fd_sink_finalize; g_object_class_install_property (gobject_class, ARG_PROTOCOL, g_param_spec_enum ("protocol", "Protocol", "The protocol to wrap data in", GST_TYPE_TCP_PROTOCOL, DEFAULT_PROTOCOL, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, ARG_MODE, g_param_spec_enum ("mode", "Mode", "The mode for selecting activity on the fds", GST_TYPE_FDSET_MODE, DEFAULT_MODE, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BUFFERS_MAX, g_param_spec_int ("buffers-max", "Buffers max", "max number of buffers to queue (-1 = no limit)", -1, G_MAXINT, DEFAULT_BUFFERS_MAX, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BUFFERS_SOFT_MAX, g_param_spec_int ("buffers-soft-max", "Buffers soft max", "Recover client when going over this limit (-1 = no limit)", -1, G_MAXINT, DEFAULT_BUFFERS_SOFT_MAX, G_PARAM_READWRITE)); #if NOT_IMPLEMENTED g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_UNIT_TYPE, g_param_spec_enum ("unit-type", "Units type", "The unit to measure the max/soft-max/queued properties", GST_TYPE_UNIT_TYPE, DEFAULT_UNIT_TYPE, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_UNITS_MAX, g_param_spec_int ("units-max", "Units max", "max number of units to queue (-1 = no limit)", -1, G_MAXINT, DEFAULT_UNITS_MAX, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_UNITS_SOFT_MAX, g_param_spec_int ("units-soft-max", "Units soft max", "Recover client when going over this limit (-1 = no limit)", -1, G_MAXINT, DEFAULT_UNITS_SOFT_MAX, G_PARAM_READWRITE)); #endif g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BUFFERS_QUEUED, g_param_spec_uint ("buffers-queued", "Buffers queued", "Number of buffers currently queued", 0, G_MAXUINT, 0, G_PARAM_READABLE)); #if NOT_IMPLEMENTED g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BYTES_QUEUED, g_param_spec_uint ("bytes-queued", "Bytes queued", "Number of bytes currently queued", 0, G_MAXUINT, 0, G_PARAM_READABLE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TIME_QUEUED, g_param_spec_uint64 ("time-queued", "Time queued", "Number of time currently queued", 0, G_MAXUINT64, 0, G_PARAM_READABLE)); #endif g_object_class_install_property (gobject_class, ARG_RECOVER_POLICY, g_param_spec_enum ("recover-policy", "Recover Policy", "How to recover when client reaches the soft max", GST_TYPE_RECOVER_POLICY, DEFAULT_RECOVER_POLICY, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TIMEOUT, g_param_spec_uint64 ("timeout", "Timeout", "Maximum inactivity timeout in nanoseconds for a client (0 = no limit)", 0, G_MAXUINT64, DEFAULT_TIMEOUT, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SYNC_METHOD, g_param_spec_enum ("sync-method", "Sync Method", "How to sync new clients to the stream", GST_TYPE_SYNC_METHOD, DEFAULT_SYNC_METHOD, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_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), ARG_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)); /** * GstMultiFdSink::add: * @gstmultifdsink: the multifdsink element to emit this signal on * @arg1: the file descriptor to add to multifdsink * * Hand the given open file descriptor to multifdsink to write to. */ gst_multi_fd_sink_signals[SIGNAL_ADD] = g_signal_new ("add", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiFdSinkClass, add), NULL, NULL, g_cclosure_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT); /** * GstMultiFdSink::remove: * @gstmultifdsink: the multifdsink element to emit this signal on * @arg1: the file descriptor to remove from multifdsink * * Remove the given open file descriptor from multifdsink. */ gst_multi_fd_sink_signals[SIGNAL_REMOVE] = g_signal_new ("remove", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiFdSinkClass, remove), NULL, NULL, gst_tcp_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT); /** * GstMultiFdSink::clear: * @gstmultifdsink: the multifdsink element to emit this signal on * * Clear all file descriptors from multifdsink. */ gst_multi_fd_sink_signals[SIGNAL_CLEAR] = g_signal_new ("clear", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiFdSinkClass, clear), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); gst_multi_fd_sink_signals[SIGNAL_GET_STATS] = g_signal_new ("get-stats", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiFdSinkClass, get_stats), NULL, NULL, gst_tcp_marshal_BOXED__INT, G_TYPE_VALUE_ARRAY, 1, G_TYPE_INT); /** * GstMultiFdSink::client-added: * @gstmultifdsink: the multifdsink element that emitted this signal * @arg1: the file descriptor that was added to multifdsink * * The given file descriptor was added to multifdsink. */ gst_multi_fd_sink_signals[SIGNAL_CLIENT_ADDED] = g_signal_new ("client-added", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiFdSinkClass, client_added), NULL, NULL, gst_tcp_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT); /** * GstMultiFdSink::client-removed: * @gstmultifdsink: the multifdsink element that emitted this signal * @arg1: the file descriptor that was removed from multifdsink * * The given file descriptor was removed from multifdsink. */ gst_multi_fd_sink_signals[SIGNAL_CLIENT_REMOVED] = g_signal_new ("client-removed", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiFdSinkClass, client_removed), NULL, NULL, gst_tcp_marshal_VOID__INT_BOXED, G_TYPE_NONE, 2, G_TYPE_INT, GST_TYPE_CLIENT_STATUS); gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_multi_fd_sink_change_state); gstbasesink_class->render = gst_multi_fd_sink_render; klass->add = gst_multi_fd_sink_add; klass->remove = gst_multi_fd_sink_remove; klass->clear = gst_multi_fd_sink_clear; klass->get_stats = gst_multi_fd_sink_get_stats; GST_DEBUG_CATEGORY_INIT (multifdsink_debug, "multifdsink", 0, "FD sink"); } static void gst_multi_fd_sink_init (GstMultiFdSink * this, GstMultiFdSinkClass * klass) { GST_OBJECT_FLAG_UNSET (this, GST_MULTI_FD_SINK_OPEN); this->protocol = DEFAULT_PROTOCOL; this->mode = DEFAULT_MODE; CLIENTS_LOCK_INIT (this); this->clients = NULL; this->fd_hash = g_hash_table_new (g_int_hash, g_int_equal); this->bufqueue = g_array_new (FALSE, TRUE, sizeof (GstBuffer *)); this->unit_type = DEFAULT_UNIT_TYPE; this->units_max = DEFAULT_UNITS_MAX; this->units_soft_max = DEFAULT_UNITS_SOFT_MAX; this->recover_policy = DEFAULT_RECOVER_POLICY; this->timeout = DEFAULT_TIMEOUT; this->sync_method = DEFAULT_SYNC_METHOD; } static void gst_multi_fd_sink_finalize (GObject * object) { GstMultiFdSink *this; this = GST_MULTI_FD_SINK (object); CLIENTS_LOCK_FREE (this); g_hash_table_destroy (this->fd_hash); g_array_free (this->bufqueue, TRUE); G_OBJECT_CLASS (parent_class)->finalize (object); } void gst_multi_fd_sink_add (GstMultiFdSink * sink, int fd) { GstTCPClient *client; GList *clink; GTimeVal now; gint flags, res; struct stat statbuf; GST_DEBUG_OBJECT (sink, "[fd %5d] adding client", fd); /* create client datastructure */ client = g_new0 (GstTCPClient, 1); client->fd.fd = fd; client->status = GST_CLIENT_STATUS_OK; client->bufpos = -1; client->bufoffset = 0; client->sending = NULL; client->bytes_sent = 0; client->dropped_buffers = 0; client->avg_queue_size = 0; client->new_connection = TRUE; /* update start time */ g_get_current_time (&now); client->connect_time = GST_TIMEVAL_TO_TIME (now); client->disconnect_time = 0; /* send last activity time to connect time */ client->last_activity_time = GST_TIMEVAL_TO_TIME (now); CLIENTS_LOCK (sink); /* check the hash to find a duplicate fd */ clink = g_hash_table_lookup (sink->fd_hash, &client->fd.fd); if (clink != NULL) { client->status = GST_CLIENT_STATUS_DUPLICATE; CLIENTS_UNLOCK (sink); GST_WARNING_OBJECT (sink, "[fd %5d] duplicate client found, refusing", fd); g_signal_emit (G_OBJECT (sink), gst_multi_fd_sink_signals[SIGNAL_CLIENT_REMOVED], 0, fd, client->status); g_free (client); return; } /* we can add the fd now */ clink = sink->clients = g_list_prepend (sink->clients, client); g_hash_table_insert (sink->fd_hash, &client->fd.fd, clink); /* set the socket to non blocking */ res = fcntl (fd, F_SETFL, O_NONBLOCK); /* we always read from a client */ gst_fdset_add_fd (sink->fdset, &client->fd); /* we don't try to read from write only fds */ flags = fcntl (fd, F_GETFL, 0); if ((flags & O_ACCMODE) != O_WRONLY) { gst_fdset_fd_ctl_read (sink->fdset, &client->fd, TRUE); } /* figure out the mode, can't use send() for non sockets */ res = fstat (fd, &statbuf); if (S_ISSOCK (statbuf.st_mode)) { client->is_socket = TRUE; } SEND_COMMAND (sink, CONTROL_RESTART); CLIENTS_UNLOCK (sink); g_signal_emit (G_OBJECT (sink), gst_multi_fd_sink_signals[SIGNAL_CLIENT_ADDED], 0, fd); } void gst_multi_fd_sink_remove (GstMultiFdSink * sink, int fd) { GList *clink; GST_DEBUG_OBJECT (sink, "[fd %5d] removing client", fd); CLIENTS_LOCK (sink); clink = g_hash_table_lookup (sink->fd_hash, &fd); if (clink != NULL) { GstTCPClient *client = (GstTCPClient *) clink->data; client->status = GST_CLIENT_STATUS_REMOVED; gst_multi_fd_sink_remove_client_link (sink, clink); SEND_COMMAND (sink, CONTROL_RESTART); } else { GST_WARNING_OBJECT (sink, "[fd %5d] no client with this fd found!", fd); } CLIENTS_UNLOCK (sink); } void gst_multi_fd_sink_clear (GstMultiFdSink * sink) { GList *clients, *next; GST_DEBUG_OBJECT (sink, "clearing all clients"); CLIENTS_LOCK (sink); for (clients = sink->clients; clients; clients = next) { GstTCPClient *client; client = (GstTCPClient *) clients->data; next = g_list_next (clients); client->status = GST_CLIENT_STATUS_REMOVED; gst_multi_fd_sink_remove_client_link (sink, clients); } SEND_COMMAND (sink, CONTROL_RESTART); CLIENTS_UNLOCK (sink); } GValueArray * gst_multi_fd_sink_get_stats (GstMultiFdSink * sink, int fd) { GstTCPClient *client; GValueArray *result = NULL; GList *clink; CLIENTS_LOCK (sink); clink = g_hash_table_lookup (sink->fd_hash, &fd); client = (GstTCPClient *) clink->data; if (client != NULL) { GValue value = { 0 }; guint64 interval; 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->connect_time); result = g_value_array_append (result, &value); g_value_unset (&value); if (client->disconnect_time == 0) { GTimeVal nowtv; g_get_current_time (&nowtv); interval = GST_TIMEVAL_TO_TIME (nowtv) - client->connect_time; } else { interval = client->disconnect_time - client->connect_time; } 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_value_init (&value, G_TYPE_UINT64); g_value_set_uint64 (&value, interval); result = g_value_array_append (result, &value); g_value_unset (&value); g_value_init (&value, G_TYPE_UINT64); g_value_set_uint64 (&value, client->last_activity_time); result = g_value_array_append (result, &value); } CLIENTS_UNLOCK (sink); /* python doesn't like a NULL pointer yet */ if (result == NULL) { GST_WARNING_OBJECT (sink, "[fd %5d] no client with this found!", fd); result = g_value_array_new (0); } return result; } /* should be called with the clientslock held. * 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-removed signal and * close the fd itself. */ static void gst_multi_fd_sink_remove_client_link (GstMultiFdSink * sink, GList * link) { int fd; GTimeVal now; GstTCPClient *client = (GstTCPClient *) link->data; GstMultiFdSinkClass *fclass; fclass = GST_MULTI_FD_SINK_GET_CLASS (sink); fd = client->fd.fd; /* FIXME: if we keep track of ip we can log it here and signal */ switch (client->status) { case GST_CLIENT_STATUS_OK: GST_WARNING_OBJECT (sink, "[fd %5d] removing client %p for no reason", fd, client); break; case GST_CLIENT_STATUS_CLOSED: GST_DEBUG_OBJECT (sink, "[fd %5d] removing client %p because of close", fd, client); break; case GST_CLIENT_STATUS_REMOVED: GST_DEBUG_OBJECT (sink, "[fd %5d] removing client %p because the app removed it", fd, client); break; case GST_CLIENT_STATUS_SLOW: GST_INFO_OBJECT (sink, "[fd %5d] removing client %p because it was too slow", fd, client); break; case GST_CLIENT_STATUS_ERROR: GST_WARNING_OBJECT (sink, "[fd %5d] removing client %p because of error", fd, client); break; default: GST_WARNING_OBJECT (sink, "[fd %5d] removing client %p with invalid reason", fd, client); break; } gst_fdset_remove_fd (sink->fdset, &client->fd); g_get_current_time (&now); client->disconnect_time = GST_TIMEVAL_TO_TIME (now); /* free client buffers */ g_slist_foreach (client->sending, (GFunc) gst_mini_object_unref, NULL); g_slist_free (client->sending); client->sending = 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_fd_sink_signals[SIGNAL_CLIENT_REMOVED], 0, fd, client->status); /* lock again before we remove the client completely */ CLIENTS_LOCK (sink); if (!g_hash_table_remove (sink->fd_hash, &client->fd.fd)) { GST_WARNING_OBJECT (sink, "[fd %5d] error removing client %p from hash", client->fd.fd, 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); if (fclass->removed) fclass->removed (sink, client->fd.fd); g_free (client); } /* handle a read on a client fd, * which either indicates a close or should be ignored * returns FALSE if some error occured or the client closed. */ static gboolean gst_multi_fd_sink_handle_client_read (GstMultiFdSink * sink, GstTCPClient * client) { int avail, fd; gboolean ret; fd = client->fd.fd; if (ioctl (fd, FIONREAD, &avail) < 0) { GST_WARNING_OBJECT (sink, "[fd %5d] ioctl failed: %s (%d)", fd, g_strerror (errno), errno); client->status = GST_CLIENT_STATUS_ERROR; ret = FALSE; return ret; } GST_DEBUG_OBJECT (sink, "[fd %5d] select reports client read of %d bytes", fd, avail); ret = TRUE; if (avail == 0) { /* client sent close, so remove it */ GST_DEBUG_OBJECT (sink, "[fd %5d] client asked for close, removing", fd); client->status = GST_CLIENT_STATUS_CLOSED; ret = FALSE; } else if (avail < 0) { GST_WARNING_OBJECT (sink, "[fd %5d] avail < 0, removing", fd); client->status = GST_CLIENT_STATUS_ERROR; ret = FALSE; } else { guint8 dummy[512]; gint nread; /* 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 { /* this is the maximum we can read */ gint to_read = MIN (avail, 512); GST_DEBUG_OBJECT (sink, "[fd %5d] client wants us to read %d bytes", fd, to_read); nread = read (fd, dummy, to_read); if (nread < -1) { GST_WARNING_OBJECT (sink, "[fd %5d] could not read %d bytes: %s (%d)", fd, to_read, g_strerror (errno), errno); client->status = GST_CLIENT_STATUS_ERROR; ret = FALSE; break; } else if (nread == 0) { GST_WARNING_OBJECT (sink, "[fd %5d] 0 bytes in read, removing", fd); client->status = GST_CLIENT_STATUS_ERROR; ret = FALSE; break; } avail -= nread; } while (avail > 0); } return ret; } /* Queue raw data, creating a new buffer. This takes ownership of the data by * setting it as GST_BUFFER_MALLOCDATA() on the created buffer */ static gboolean gst_multi_fd_sink_client_queue_data (GstMultiFdSink * sink, GstTCPClient * client, gchar * data, gint len) { GstBuffer *buf; buf = gst_buffer_new (); GST_BUFFER_DATA (buf) = (guint8 *) data; GST_BUFFER_MALLOCDATA (buf) = (guint8 *) data; GST_BUFFER_SIZE (buf) = len; GST_LOG_OBJECT (sink, "[fd %5d] queueing data of length %d", client->fd.fd, len); client->sending = g_slist_append (client->sending, buf); return TRUE; } static gboolean gst_multi_fd_sink_client_queue_caps (GstMultiFdSink * sink, GstTCPClient * client, const GstCaps * caps) { guint8 *header; guint8 *payload; guint length; gchar *string; g_return_val_if_fail (caps != NULL, FALSE); string = gst_caps_to_string (caps); GST_DEBUG_OBJECT (sink, "[fd %5d] Queueing caps %s through GDP", client->fd.fd, string); g_free (string); if (!gst_dp_packet_from_caps (caps, 0, &length, &header, &payload)) { GST_DEBUG_OBJECT (sink, "Could not create GDP packet from caps"); return FALSE; } gst_multi_fd_sink_client_queue_data (sink, client, (gchar *) header, length); length = gst_dp_header_payload_length (header); gst_multi_fd_sink_client_queue_data (sink, client, (gchar *) payload, length); return TRUE; } static gboolean is_sync_frame (GstMultiFdSink * sink, GstBuffer * buffer) { if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT)) { return FALSE; } else if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_IN_CAPS)) { return TRUE; } return FALSE; } static gboolean gst_multi_fd_sink_client_queue_buffer (GstMultiFdSink * sink, GstTCPClient * client, GstBuffer * buffer) { if (sink->protocol == GST_TCP_PROTOCOL_GDP) { guint8 *header; guint len; if (!gst_dp_header_from_buffer (buffer, 0, &len, &header)) { GST_DEBUG_OBJECT (sink, "[fd %5d] could not create header, removing client", client->fd.fd); return FALSE; } gst_multi_fd_sink_client_queue_data (sink, client, (gchar *) header, len); } GST_LOG_OBJECT (sink, "[fd %5d] queueing buffer of length %d", client->fd.fd, GST_BUFFER_SIZE (buffer)); gst_buffer_ref (buffer); client->sending = g_slist_append (client->sending, buffer); return TRUE; } static gint gst_multi_fd_sink_new_client (GstMultiFdSink * sink, GstTCPClient * client) { gint result; switch (sink->sync_method) { case GST_SYNC_METHOD_NEXT_KEYFRAME: { /* if the buffer at the head of the queue is a sync point we can proceed, * else we need to skip the buffer and wait for a new one */ GST_LOG_OBJECT (sink, "[fd %5d] new client, bufpos %d, waiting for keyframe", client->fd.fd, client->bufpos); /* the client is not yet alligned to a buffer */ if (client->bufpos < 0) { result = -1; } else { GstBuffer *buf; gint i; for (i = client->bufpos; i >= 0; i--) { /* get the buffer for the client */ buf = g_array_index (sink->bufqueue, GstBuffer *, i); if (is_sync_frame (sink, buf)) { GST_LOG_OBJECT (sink, "[fd %5d] new client, found sync", client->fd.fd); result = i; goto done; } else { /* client is not on a buffer, need to skip this buffer and * wait some more */ GST_LOG_OBJECT (sink, "[fd %5d] new client, skipping buffer", client->fd.fd); client->bufpos--; } } result = -1; } break; } case GST_SYNC_METHOD_LATEST_KEYFRAME: { /* FIXME for new clients we constantly scan the complete * buffer queue for sync point whenever a buffer is added. This is * suboptimal because if we cannot find a sync point the first time, * the algorithm should behave as GST_SYNC_METHOD_NEXT_KEYFRAME */ gint i, len; GST_LOG_OBJECT (sink, "[fd %5d] new client, bufpos %d, bursting keyframe", client->fd.fd, client->bufpos); /* take length of queued buffers */ len = sink->bufqueue->len; /* assume we don't find a keyframe */ result = -1; /* then loop over all buffers to find the first keyframe */ for (i = 0; i < len; i++) { GstBuffer *buf; buf = g_array_index (sink->bufqueue, GstBuffer *, i); if (is_sync_frame (sink, buf)) { /* found a keyframe, return its position */ GST_LOG_OBJECT (sink, "found keyframe at %d", i); result = i; goto done; } } GST_LOG_OBJECT (sink, "no keyframe found"); /* throw client to the waiting state */ client->bufpos = -1; break; } default: /* no syncing, we are happy with whatever the client is going to get */ GST_LOG_OBJECT (sink, "no client syn needed"); result = client->bufpos; break; } done: return result; } /* handle a write on a client, * which indicates a read request from a client. * * The strategy is as follows, for each client we maintain a queue of GstBuffers * that contain the raw bytes we need to send to the client. In the case of the * GDP protocol, we create buffers out of the header bytes so that we can only * focus on sending buffers. * * We first check to see if we need to send caps (in GDP) and 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 client->sending queue and if the queue * is empty, it will pick a buffer from the global queue. * * Sending the Buffers from the client->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 * client->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_fd_sink_handle_client_write (GstMultiFdSink * sink, GstTCPClient * client) { int fd = client->fd.fd; gboolean more; gboolean res; GstClockTime now; GTimeVal nowtv; g_get_current_time (&nowtv); now = GST_TIMEVAL_TO_TIME (nowtv); /* when using GDP, first check if we have queued caps yet */ if (sink->protocol == GST_TCP_PROTOCOL_GDP) { if (!client->caps_sent) { GstPad *peer; GstCaps *caps; peer = gst_pad_get_peer (GST_BASE_SINK_PAD (sink)); if (!peer) { GST_WARNING_OBJECT (sink, "pad has no peer"); return FALSE; } caps = gst_pad_get_negotiated_caps (peer); gst_object_unref (peer); /* queue caps for sending */ res = gst_multi_fd_sink_client_queue_caps (sink, client, caps); gst_caps_unref (caps); if (!res) { GST_DEBUG_OBJECT (sink, "Failed queueing caps, removing client"); return FALSE; } client->caps_sent = TRUE; } } /* if we have streamheader buffers, and haven't sent them to this client * yet, send them out one by one */ if (!client->streamheader_sent) { GST_DEBUG_OBJECT (sink, "[fd %5d] Sending streamheader, %d buffers", fd, g_slist_length (sink->streamheader)); if (sink->streamheader) { GSList *l; for (l = sink->streamheader; l; l = l->next) { /* queue stream headers for sending */ res = gst_multi_fd_sink_client_queue_buffer (sink, client, GST_BUFFER (l->data)); if (!res) { GST_DEBUG_OBJECT (sink, "Failed queueing streamheader, removing client"); return FALSE; } } } client->streamheader_sent = TRUE; } more = TRUE; do { gint maxsize; if (!client->sending) { /* client is not working on a buffer */ if (client->bufpos == -1) { /* client is too fast, remove from write queue until new buffer is * available */ gst_fdset_fd_ctl_write (sink->fdset, &client->fd, FALSE); return TRUE; } else { /* client can pick a buffer from the global queue */ GstBuffer *buf; /* for new connections, we need to find a good spot in the * bufqueue to start streaming from */ if (client->new_connection) { gint position = gst_multi_fd_sink_new_client (sink, client); if (position >= 0) { /* we got a valid spot in the queue */ client->new_connection = FALSE; client->bufpos = position; } else { /* cannot send data to this client yet */ gst_fdset_fd_ctl_write (sink->fdset, &client->fd, FALSE); return TRUE; } } /* grab buffer */ buf = g_array_index (sink->bufqueue, GstBuffer *, client->bufpos); client->bufpos--; GST_LOG_OBJECT (sink, "[fd %5d] client %p at position %d", fd, client, client->bufpos); /* queueing a buffer will ref it */ gst_multi_fd_sink_client_queue_buffer (sink, client, buf); /* need to start from the first byte for this new buffer */ client->bufoffset = 0; } } /* see if we need to send something */ if (client->sending) { ssize_t wrote; GstBuffer *head; /* pick first buffer from list */ head = GST_BUFFER (client->sending->data); maxsize = GST_BUFFER_SIZE (head) - client->bufoffset; /* try to write the complete buffer */ #ifdef MSG_NOSIGNAL #define FLAGS MSG_NOSIGNAL #else #define FLAGS 0 #endif if (client->is_socket) { wrote = send (fd, GST_BUFFER_DATA (head) + client->bufoffset, maxsize, FLAGS); } else { wrote = write (fd, GST_BUFFER_DATA (head) + client->bufoffset, maxsize); } if (wrote < 0) { /* hmm error.. */ if (errno == EAGAIN) { /* nothing serious, resource was unavailable, try again later */ more = FALSE; } else if (errno == ECONNRESET) { GST_DEBUG_OBJECT (sink, "[fd %5d] connection reset by peer, removing", fd); client->status = GST_CLIENT_STATUS_CLOSED; return FALSE; } else { GST_WARNING_OBJECT (sink, "[fd %5d] could not write, removing client: %s (%d)", fd, g_strerror (errno), errno); client->status = GST_CLIENT_STATUS_ERROR; return FALSE; } } 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 %d of %d bytes", fd, wrote); client->bufoffset += wrote; more = FALSE; } else { /* complete buffer was written, we can proceed to the next one */ client->sending = g_slist_remove (client->sending, head); gst_buffer_unref (head); /* make sure we start from byte 0 for the next buffer */ client->bufoffset = 0; } /* update stats */ client->bytes_sent += wrote; client->last_activity_time = now; sink->bytes_served += wrote; } } } while (more); return TRUE; } /* calculate the new position for a client after recovery. This function * does not update the client position but merely returns the required * position. */ static gint gst_multi_fd_sink_recover_client (GstMultiFdSink * sink, GstTCPClient * client) { gint newbufpos; GST_WARNING_OBJECT (sink, "[fd %5d] client %p is lagging at %d, recover using policy %d", client->fd.fd, client, client->bufpos, sink->recover_policy); switch (sink->recover_policy) { case GST_RECOVER_POLICY_NONE: /* do nothing, client will catch up or get kicked out when it reaches * the hard max */ newbufpos = client->bufpos; break; case GST_RECOVER_POLICY_RESYNC_LATEST: /* move to beginning of queue */ newbufpos = -1; break; case GST_RECOVER_POLICY_RESYNC_SOFT_LIMIT: /* move to beginning of soft max */ newbufpos = sink->units_soft_max; break; case GST_RECOVER_POLICY_RESYNC_KEYFRAME: /* find keyframe in buffers, we search backwards to find the * closest keyframe relative to what this client already received. */ newbufpos = MIN (sink->bufqueue->len - 1, sink->units_soft_max - 1); while (newbufpos >= 0) { GstBuffer *buf; buf = g_array_index (sink->bufqueue, GstBuffer *, newbufpos); if (is_sync_frame (sink, buf)) { /* found a buffer that is not a delta unit */ break; } newbufpos--; } break; default: /* unknown recovery procedure */ newbufpos = sink->units_soft_max; break; } return newbufpos; } /* Queue a buffer on the global queue. * * This functions adds the buffer to the front of a GArray. It removes the * tail buffer if the max queue size is exceeded. Unreffing the buffer that * is queued. 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 * client->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 signalling * the select thread that the fd_set changed. * */ static void gst_multi_fd_sink_queue_buffer (GstMultiFdSink * sink, GstBuffer * buf) { GList *clients, *next; gint queuelen; gboolean need_signal = FALSE; gint max_buffer_usage; gint i; GTimeVal nowtv; GstClockTime now; g_get_current_time (&nowtv); now = GST_TIMEVAL_TO_TIME (nowtv); CLIENTS_LOCK (sink); /* add buffer to queue */ g_array_prepend_val (sink->bufqueue, buf); queuelen = sink->bufqueue->len; /* then loop over the clients and update the positions */ max_buffer_usage = 0; for (clients = sink->clients; clients; clients = next) { GstTCPClient *client; client = (GstTCPClient *) clients->data; next = g_list_next (clients); client->bufpos++; GST_LOG_OBJECT (sink, "[fd %5d] client %p at position %d", client->fd.fd, client, client->bufpos); /* check soft max if needed, recover client */ if (sink->units_soft_max > 0 && client->bufpos >= sink->units_soft_max) { gint newpos; newpos = gst_multi_fd_sink_recover_client (sink, client); if (newpos != client->bufpos) { client->bufpos = newpos; client->discont = TRUE; GST_INFO_OBJECT (sink, "[fd %5d] client %p position reset to %d", client->fd.fd, client, client->bufpos); } else { GST_INFO_OBJECT (sink, "[fd %5d] client %p not recovering position", client->fd.fd, client); } } /* check hard max and timeout, remove client */ if ((sink->units_max > 0 && client->bufpos >= sink->units_max) || (sink->timeout > 0 && now - client->last_activity_time > sink->timeout)) { /* remove client */ GST_WARNING_OBJECT (sink, "[fd %5d] client %p is too slow, removing", client->fd.fd, client); /* remove the client, the fd set will be cleared and the select thread will * be signaled */ client->status = GST_CLIENT_STATUS_SLOW; gst_multi_fd_sink_remove_client_link (sink, clients); /* set client to invalid position while being removed */ client->bufpos = -1; need_signal = TRUE; } else if (client->bufpos == 0 || client->new_connection) { /* can send data to this client now. need to signal the select thread that * the fd_set changed */ gst_fdset_fd_ctl_write (sink->fdset, &client->fd, TRUE); need_signal = TRUE; } /* keep track of maximum buffer usage */ if (client->bufpos > max_buffer_usage) { max_buffer_usage = client->bufpos; } } /* now look for sync points and make sure there is at least one * sync point in the queue. We only do this if the burst mode * is enabled. */ if (sink->sync_method == GST_SYNC_METHOD_LATEST_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 (sink->units_soft_max > 0) { limit = MIN (limit, sink->units_soft_max); } GST_LOG_OBJECT (sink, "extending queue to include sync point, now at %d", max_buffer_usage); for (i = 0; i < limit; i++) { buf = g_array_index (sink->bufqueue, GstBuffer *, i); if (is_sync_frame (sink, 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); } /* 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 (sink->bufqueue, GstBuffer *, i); sink->bufqueue = g_array_remove_index (sink->bufqueue, i); /* unref tail buffer */ gst_buffer_unref (old); } /* save for stats */ sink->buffers_queued = max_buffer_usage; CLIENTS_UNLOCK (sink); /* and send a signal to thread if fd_set changed */ if (need_signal) { SEND_COMMAND (sink, CONTROL_RESTART); } } /* Handle the clients. Basically does a blocking select for one * of the client fds to become read or writable. We also have a * filedescriptor to receive commands on that we need to check. * * After going out of the select call, we read and write to all * clients that can do so. Badly behaving clients are put on a * garbage list and removed. */ static void gst_multi_fd_sink_handle_clients (GstMultiFdSink * sink) { int result; GList *clients, *next; gboolean try_again; GstMultiFdSinkClass *fclass; fclass = GST_MULTI_FD_SINK_GET_CLASS (sink); do { gboolean stop = FALSE; try_again = FALSE; /* check for: * - server socket input (ie, new client connections) * - client socket input (ie, clients saying goodbye) * - client socket output (ie, client reads) */ GST_LOG_OBJECT (sink, "waiting on action on fdset"); result = gst_fdset_wait (sink->fdset, -1); /* < 0 is an error, 0 just means a timeout happened, which is impossible */ if (result < 0) { GST_WARNING_OBJECT (sink, "wait failed: %s (%d)", g_strerror (errno), errno); if (errno == EBADF) { /* ok, so one or more of the fds is invalid. We loop over them to find * the ones that give an error to the F_GETFL fcntl. */ CLIENTS_LOCK (sink); for (clients = sink->clients; clients; clients = next) { GstTCPClient *client; int fd; long flags; int res; client = (GstTCPClient *) clients->data; next = g_list_next (clients); fd = client->fd.fd; res = fcntl (fd, F_GETFL, &flags); if (res == -1) { GST_WARNING_OBJECT (sink, "fnctl failed for %d, removing: %s (%d)", fd, g_strerror (errno), errno); if (errno == EBADF) { client->status = GST_CLIENT_STATUS_ERROR; gst_multi_fd_sink_remove_client_link (sink, clients); } } } CLIENTS_UNLOCK (sink); /* after this, go back in the select loop as the read/writefds * are not valid */ try_again = TRUE; } else if (errno == EINTR) { /* interrupted system call, just redo the select */ try_again = TRUE; } else { /* this is quite bad... */ GST_ELEMENT_ERROR (sink, RESOURCE, READ, (NULL), ("select failed: %s (%d)", g_strerror (errno), errno)); return; } } else { GST_LOG_OBJECT (sink, "wait done: %d sockets with events", result); /* read all commands */ if (gst_fdset_fd_can_read (sink->fdset, &READ_SOCKET (sink))) { GST_LOG_OBJECT (sink, "have a command"); while (TRUE) { gchar command; int res; READ_COMMAND (sink, command, res); if (res < 0) { GST_LOG_OBJECT (sink, "no more commands"); /* no more commands */ break; } switch (command) { case CONTROL_RESTART: GST_LOG_OBJECT (sink, "restart"); /* need to restart the select call as the fd_set changed */ /* if other file descriptors than the READ_SOCKET had activity, * we don't restart just yet, but handle the other clients first */ if (result == 1) try_again = TRUE; break; case CONTROL_STOP: /* break out of the select loop */ GST_LOG_OBJECT (sink, "stop"); /* stop this function */ stop = TRUE; break; default: GST_WARNING_OBJECT (sink, "unkown"); g_warning ("multifdsink: unknown control message received"); break; } } } } if (stop) { return; } } while (try_again); /* subclasses can check fdset with this virtual function */ if (fclass->wait) fclass->wait (sink, sink->fdset); /* Check the clients */ CLIENTS_LOCK (sink); for (clients = sink->clients; clients; clients = next) { GstTCPClient *client; client = (GstTCPClient *) clients->data; next = g_list_next (clients); if (client->status != GST_CLIENT_STATUS_OK) { gst_multi_fd_sink_remove_client_link (sink, clients); continue; } if (gst_fdset_fd_has_closed (sink->fdset, &client->fd)) { client->status = GST_CLIENT_STATUS_CLOSED; gst_multi_fd_sink_remove_client_link (sink, clients); continue; } if (gst_fdset_fd_has_error (sink->fdset, &client->fd)) { GST_WARNING_OBJECT (sink, "gst_fdset_fd_has_error for %d", client->fd); client->status = GST_CLIENT_STATUS_ERROR; gst_multi_fd_sink_remove_client_link (sink, clients); continue; } if (gst_fdset_fd_can_read (sink->fdset, &client->fd)) { /* handle client read */ if (!gst_multi_fd_sink_handle_client_read (sink, client)) { gst_multi_fd_sink_remove_client_link (sink, clients); continue; } } if (gst_fdset_fd_can_write (sink->fdset, &client->fd)) { /* handle client write */ if (!gst_multi_fd_sink_handle_client_write (sink, client)) { gst_multi_fd_sink_remove_client_link (sink, clients); continue; } } } CLIENTS_UNLOCK (sink); } /* 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_fd_sink_thread (GstMultiFdSink * sink) { while (sink->running) { gst_multi_fd_sink_handle_clients (sink); } return NULL; } static GstFlowReturn gst_multi_fd_sink_render (GstBaseSink * bsink, GstBuffer * buf) { GstMultiFdSink *sink; sink = GST_MULTI_FD_SINK (bsink); /* since we keep this buffer out of the scope of this method */ gst_buffer_ref (buf); g_return_val_if_fail (GST_OBJECT_FLAG_IS_SET (sink, GST_MULTI_FD_SINK_OPEN), GST_FLOW_ERROR); GST_LOG_OBJECT (sink, "received buffer %p", buf); /* if we get IN_CAPS buffers, but the previous buffer was not IN_CAPS, * it means we're getting new streamheader buffers, and we should clear * the old ones */ if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_IN_CAPS) && sink->previous_buffer_in_caps == FALSE) { GST_DEBUG_OBJECT (sink, "receiving new IN_CAPS buffers, clearing old streamheader"); g_slist_foreach (sink->streamheader, (GFunc) gst_mini_object_unref, NULL); g_slist_free (sink->streamheader); sink->streamheader = NULL; } /* if the incoming buffer is marked as IN CAPS, then we assume for now * it's a streamheader that needs to be sent to each new client, so we * put it on our internal list of streamheader buffers. * After that we return, since we only send these out when we get * non IN_CAPS buffers so we properly keep track of clients that got * streamheaders. */ if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_IN_CAPS)) { sink->previous_buffer_in_caps = TRUE; GST_DEBUG_OBJECT (sink, "appending IN_CAPS buffer with length %d to streamheader", GST_BUFFER_SIZE (buf)); sink->streamheader = g_slist_append (sink->streamheader, buf); return GST_FLOW_OK; } sink->previous_buffer_in_caps = FALSE; /* queue the buffer */ gst_multi_fd_sink_queue_buffer (sink, buf); sink->bytes_to_serve += GST_BUFFER_SIZE (buf); return GST_FLOW_OK; } static void gst_multi_fd_sink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstMultiFdSink *multifdsink; g_return_if_fail (GST_IS_MULTI_FD_SINK (object)); multifdsink = GST_MULTI_FD_SINK (object); switch (prop_id) { case ARG_PROTOCOL: multifdsink->protocol = g_value_get_enum (value); break; case ARG_MODE: multifdsink->mode = g_value_get_enum (value); break; case ARG_BUFFERS_MAX: multifdsink->units_max = g_value_get_int (value); break; case ARG_BUFFERS_SOFT_MAX: multifdsink->units_soft_max = g_value_get_int (value); break; case ARG_UNIT_TYPE: multifdsink->unit_type = g_value_get_enum (value); break; case ARG_UNITS_MAX: multifdsink->units_max = g_value_get_int (value); break; case ARG_UNITS_SOFT_MAX: multifdsink->units_soft_max = g_value_get_int (value); break; case ARG_RECOVER_POLICY: multifdsink->recover_policy = g_value_get_enum (value); break; case ARG_TIMEOUT: multifdsink->timeout = g_value_get_uint64 (value); break; case ARG_SYNC_METHOD: multifdsink->sync_method = g_value_get_enum (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_multi_fd_sink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstMultiFdSink *multifdsink; g_return_if_fail (GST_IS_MULTI_FD_SINK (object)); multifdsink = GST_MULTI_FD_SINK (object); switch (prop_id) { case ARG_PROTOCOL: g_value_set_enum (value, multifdsink->protocol); break; case ARG_MODE: g_value_set_enum (value, multifdsink->mode); break; case ARG_BUFFERS_MAX: g_value_set_int (value, multifdsink->units_max); break; case ARG_BUFFERS_SOFT_MAX: g_value_set_int (value, multifdsink->units_soft_max); break; case ARG_BUFFERS_QUEUED: g_value_set_uint (value, multifdsink->buffers_queued); break; case ARG_BYTES_QUEUED: g_value_set_uint (value, multifdsink->bytes_queued); break; case ARG_TIME_QUEUED: g_value_set_uint64 (value, multifdsink->time_queued); break; case ARG_UNIT_TYPE: g_value_set_enum (value, multifdsink->unit_type); break; case ARG_UNITS_MAX: g_value_set_int (value, multifdsink->units_max); break; case ARG_UNITS_SOFT_MAX: g_value_set_int (value, multifdsink->units_soft_max); break; case ARG_RECOVER_POLICY: g_value_set_enum (value, multifdsink->recover_policy); break; case ARG_TIMEOUT: g_value_set_uint64 (value, multifdsink->timeout); break; case ARG_SYNC_METHOD: g_value_set_enum (value, multifdsink->sync_method); break; case ARG_BYTES_TO_SERVE: g_value_set_uint64 (value, multifdsink->bytes_to_serve); break; case ARG_BYTES_SERVED: g_value_set_uint64 (value, multifdsink->bytes_served); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } /* create a socket for sending to remote machine */ static gboolean gst_multi_fd_sink_start (GstBaseSink * bsink) { GstMultiFdSinkClass *fclass; int control_socket[2]; GstMultiFdSink *this; if (GST_OBJECT_FLAG_IS_SET (bsink, GST_MULTI_FD_SINK_OPEN)) return TRUE; this = GST_MULTI_FD_SINK (bsink); fclass = GST_MULTI_FD_SINK_GET_CLASS (this); GST_INFO_OBJECT (this, "starting in mode %d", this->mode); this->fdset = gst_fdset_new (this->mode); if (socketpair (PF_UNIX, SOCK_STREAM, 0, control_socket) < 0) goto socket_pair; READ_SOCKET (this).fd = control_socket[0]; WRITE_SOCKET (this).fd = control_socket[1]; gst_fdset_add_fd (this->fdset, &READ_SOCKET (this)); gst_fdset_fd_ctl_read (this->fdset, &READ_SOCKET (this), TRUE); fcntl (READ_SOCKET (this).fd, F_SETFL, O_NONBLOCK); fcntl (WRITE_SOCKET (this).fd, F_SETFL, O_NONBLOCK); this->streamheader = NULL; this->bytes_to_serve = 0; this->bytes_served = 0; if (fclass->init) { fclass->init (this); } this->running = TRUE; this->thread = g_thread_create ((GThreadFunc) gst_multi_fd_sink_thread, this, TRUE, NULL); GST_OBJECT_FLAG_SET (this, GST_MULTI_FD_SINK_OPEN); return TRUE; /* ERRORS */ socket_pair: { GST_ELEMENT_ERROR (this, RESOURCE, OPEN_READ_WRITE, (NULL), GST_ERROR_SYSTEM); return FALSE; } } static gboolean multifdsink_hash_remove (gpointer key, gpointer value, gpointer data) { return TRUE; } static gboolean gst_multi_fd_sink_stop (GstBaseSink * bsink) { GstMultiFdSinkClass *fclass; GstMultiFdSink *this; this = GST_MULTI_FD_SINK (bsink); fclass = GST_MULTI_FD_SINK_GET_CLASS (this); if (!GST_OBJECT_FLAG_IS_SET (bsink, GST_MULTI_FD_SINK_OPEN)) return TRUE; this->running = FALSE; SEND_COMMAND (this, CONTROL_STOP); if (this->thread) { g_thread_join (this->thread); this->thread = NULL; } /* free the clients */ gst_multi_fd_sink_clear (this); close (READ_SOCKET (this).fd); close (WRITE_SOCKET (this).fd); if (this->streamheader) { g_slist_foreach (this->streamheader, (GFunc) gst_mini_object_unref, NULL); g_slist_free (this->streamheader); this->streamheader = NULL; } if (fclass->close) fclass->close (this); if (this->fdset) { gst_fdset_remove_fd (this->fdset, &READ_SOCKET (this)); gst_fdset_free (this->fdset); this->fdset = NULL; } g_hash_table_foreach_remove (this->fd_hash, multifdsink_hash_remove, this); GST_OBJECT_FLAG_UNSET (this, GST_MULTI_FD_SINK_OPEN); return TRUE; } static GstStateChangeReturn gst_multi_fd_sink_change_state (GstElement * element, GstStateChange transition) { GstMultiFdSink *sink; GstStateChangeReturn ret; sink = GST_MULTI_FD_SINK (element); /* we disallow changing the state from the streaming thread */ if (g_thread_self () == sink->thread) return GST_STATE_CHANGE_FAILURE; switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: if (!gst_multi_fd_sink_start (GST_BASE_SINK (sink))) goto start_failed; break; case GST_STATE_CHANGE_READY_TO_PAUSED: break; case GST_STATE_CHANGE_PAUSED_TO_PLAYING: break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_PLAYING_TO_PAUSED: break; case GST_STATE_CHANGE_PAUSED_TO_READY: break; case GST_STATE_CHANGE_READY_TO_NULL: gst_multi_fd_sink_stop (GST_BASE_SINK (sink)); break; default: break; } return ret; /* ERRORS */ start_failed: { return GST_STATE_CHANGE_FAILURE; } }