/* 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-multihandlesink * @see_also: tcpserversink * * This plugin writes incoming data to a set of file descriptors. The * file descriptors can be added to multihandlesink by emitting the #GstMultiHandleSink::add signal. * For each descriptor added, the #GstMultiHandleSink::client-added signal will be called. * * As of version 0.10.8, a client can also be added with the #GstMultiHandleSink::add-full signal * that allows for more control over what and how much data a client * initially receives. * * Clients can be removed from multihandlesink by emitting the #GstMultiHandleSink::remove signal. For * each descriptor removed, the #GstMultiHandleSink::client-removed signal will be called. The * #GstMultiHandleSink::client-removed signal can also be fired when multihandlesink decides that a * client is not active anymore or, depending on the value of the * #GstMultiHandleSink:recover-policy property, if the client is reading too slowly. * In all cases, multihandlesink will never close a file descriptor itself. * The user of multihandlesink is responsible for closing all file descriptors. * This can for example be done in response to the #GstMultiHandleSink::client-fd-removed signal. * Note that multihandlesink still has a reference to the file descriptor when the * #GstMultiHandleSink::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 #GstMultiHandleSink::client-removed signal handler, and you should use the * #GstMultiHandleSink::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 multihandlesink, the #GstMultiHandleSink: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 * multihandlesink (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 #GstMultiHandleSink: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 * #GstMultiHandleSink:time-min and #GstMultiHandleSink:bytes-min properties respectively. * These properties are useful if the application adds clients with the * #GstMultiHandleSink::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 multihandlesink receives data. If the client is reading too * fast, no data will be send to the client until multihandlesink receives more * data. If the client, however, reads too slowly, data for that client will be * queued up in multihandlesink. Two properties control the amount of data * (buffers) that is queued in multihandlesink: #GstMultiHandleSink:buffers-max and * #GstMultiHandleSink:buffers-soft-max. A client that falls behind by * #GstMultiHandleSink:buffers-max is removed from multihandlesink forcibly. * * A client with a lag of at least #GstMultiHandleSink:buffers-soft-max enters the recovery * procedure which is controlled with the #GstMultiHandleSink: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. * * multihandlesink 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 "gstmultihandlesink.h" #include "gsttcp-marshal.h" #ifndef G_OS_WIN32 #include #endif #define NOT_IMPLEMENTED 0 static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS_ANY); GST_DEBUG_CATEGORY_STATIC (multihandlesink_debug); #define GST_CAT_DEFAULT (multihandlesink_debug) /* MultiHandleSink signals and args */ enum { GST_MULTI_SINK_LAST_SIGNAL, /* methods */ SIGNAL_ADD, SIGNAL_ADD_BURST, SIGNAL_CLEAR, /* signals */ SIGNAL_CLIENT_ADDED, SIGNAL_CLIENT_REMOVED, SIGNAL_CLIENT_SOCKET_REMOVED, LAST_SIGNAL }; /* this is really arbitrarily chosen */ #define DEFAULT_BUFFERS_MAX -1 #define DEFAULT_BUFFERS_SOFT_MAX -1 #define DEFAULT_TIME_MIN -1 #define DEFAULT_BYTES_MIN -1 #define DEFAULT_BUFFERS_MIN -1 #define DEFAULT_UNIT_FORMAT GST_FORMAT_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 #define DEFAULT_BURST_FORMAT GST_FORMAT_UNDEFINED #define DEFAULT_BURST_VALUE 0 #define DEFAULT_QOS_DSCP -1 #define DEFAULT_RESEND_STREAMHEADER TRUE enum { PROP_0, PROP_BUFFERS_QUEUED, PROP_BYTES_QUEUED, PROP_TIME_QUEUED, PROP_UNIT_FORMAT, PROP_UNITS_MAX, PROP_UNITS_SOFT_MAX, PROP_BUFFERS_MAX, PROP_BUFFERS_SOFT_MAX, PROP_TIME_MIN, PROP_BYTES_MIN, PROP_BUFFERS_MIN, PROP_RECOVER_POLICY, PROP_TIMEOUT, PROP_SYNC_METHOD, PROP_BYTES_TO_SERVE, PROP_BYTES_SERVED, PROP_BURST_FORMAT, PROP_BURST_VALUE, PROP_QOS_DSCP, PROP_RESEND_STREAMHEADER, PROP_NUM_HANDLES, PROP_LAST }; GType gst_multi_handle_sink_recover_policy_get_type (void) { static GType recover_policy_type = 0; static const 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 ("GstMultiHandleSinkRecoverPolicy", recover_policy); } return recover_policy_type; } GType gst_multi_handle_sink_sync_method_get_type (void) { static GType sync_method_type = 0; static const 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"}, {GST_SYNC_METHOD_BURST, "Serve burst-value data to client", "burst"}, {GST_SYNC_METHOD_BURST_KEYFRAME, "Serve burst-value data starting on a keyframe", "burst-keyframe"}, {GST_SYNC_METHOD_BURST_WITH_KEYFRAME, "Serve burst-value data preferably starting on a keyframe", "burst-with-keyframe"}, {0, NULL, NULL}, }; if (!sync_method_type) { sync_method_type = g_enum_register_static ("GstMultiHandleSinkSyncMethod", sync_method); } return sync_method_type; } GType gst_multi_handle_sink_client_status_get_type (void) { static GType client_status_type = 0; static const GEnumValue client_status[] = { {GST_CLIENT_STATUS_OK, "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"}, {GST_CLIENT_STATUS_FLUSHING, "Flushing", "flushing"}, {0, NULL, NULL}, }; if (!client_status_type) { client_status_type = g_enum_register_static ("GstMultiHandleSinkClientStatus", client_status); } return client_status_type; } static void gst_multi_handle_sink_finalize (GObject * object); static void gst_multi_handle_sink_clear (GstMultiHandleSink * mhsink); static GstFlowReturn gst_multi_handle_sink_render (GstBaseSink * bsink, GstBuffer * buf); static void gst_multi_handle_sink_queue_buffer (GstMultiHandleSink * mhsink, GstBuffer * buffer); static gboolean gst_multi_handle_sink_client_queue_buffer (GstMultiHandleSink * mhsink, GstMultiHandleClient * mhclient, GstBuffer * buffer); static GstStateChangeReturn gst_multi_handle_sink_change_state (GstElement * element, GstStateChange transition); static void gst_multi_handle_sink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_multi_handle_sink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); #define gst_multi_handle_sink_parent_class parent_class G_DEFINE_TYPE (GstMultiHandleSink, gst_multi_handle_sink, GST_TYPE_BASE_SINK); static guint gst_multi_handle_sink_signals[LAST_SIGNAL] = { 0 }; static gint find_syncframe (GstMultiHandleSink * sink, gint idx, gint direction); #define find_next_syncframe(s,i) find_syncframe(s,i,1) #define find_prev_syncframe(s,i) find_syncframe(s,i,-1) static gboolean is_sync_frame (GstMultiHandleSink * sink, GstBuffer * buffer); static gboolean gst_multi_handle_sink_stop (GstBaseSink * bsink); static gboolean gst_multi_handle_sink_start (GstBaseSink * bsink); static gint get_buffers_max (GstMultiHandleSink * sink, gint64 max); static gint gst_multi_handle_sink_recover_client (GstMultiHandleSink * sink, GstMultiHandleClient * client); static void gst_multi_handle_sink_setup_dscp (GstMultiHandleSink * mhsink); static gboolean find_limits (GstMultiHandleSink * sink, gint * min_idx, gint bytes_min, gint buffers_min, gint64 time_min, gint * max_idx, gint bytes_max, gint buffers_max, gint64 time_max); static void gst_multi_handle_sink_class_init (GstMultiHandleSinkClass * 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_handle_sink_set_property; gobject_class->get_property = gst_multi_handle_sink_get_property; gobject_class->finalize = gst_multi_handle_sink_finalize; g_object_class_install_property (gobject_class, PROP_BUFFERS_MAX, g_param_spec_int ("buffers-max", "Buffers max", "max number of buffers to queue for a client (-1 = no limit)", -1, G_MAXINT, DEFAULT_BUFFERS_MAX, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_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 | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_BYTES_MIN, g_param_spec_int ("bytes-min", "Bytes min", "min number of bytes to queue (-1 = as little as possible)", -1, G_MAXINT, DEFAULT_BYTES_MIN, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_TIME_MIN, g_param_spec_int64 ("time-min", "Time min", "min number of time to queue (-1 = as little as possible)", -1, G_MAXINT64, DEFAULT_TIME_MIN, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_BUFFERS_MIN, g_param_spec_int ("buffers-min", "Buffers min", "min number of buffers to queue (-1 = as few as possible)", -1, G_MAXINT, DEFAULT_BUFFERS_MIN, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_UNIT_FORMAT, g_param_spec_enum ("unit-format", "Units format", "The unit to measure the max/soft-max/queued properties", GST_TYPE_FORMAT, DEFAULT_UNIT_FORMAT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_UNITS_MAX, g_param_spec_int64 ("units-max", "Units max", "max number of units to queue (-1 = no limit)", -1, G_MAXINT64, DEFAULT_UNITS_MAX, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_UNITS_SOFT_MAX, g_param_spec_int64 ("units-soft-max", "Units soft max", "Recover client when going over this limit (-1 = no limit)", -1, G_MAXINT64, DEFAULT_UNITS_SOFT_MAX, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_BUFFERS_QUEUED, g_param_spec_uint ("buffers-queued", "Buffers queued", "Number of buffers currently queued", 0, G_MAXUINT, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); #if NOT_IMPLEMENTED g_object_class_install_property (gobject_class, PROP_BYTES_QUEUED, g_param_spec_uint ("bytes-queued", "Bytes queued", "Number of bytes currently queued", 0, G_MAXUINT, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_TIME_QUEUED, g_param_spec_uint64 ("time-queued", "Time queued", "Number of time currently queued", 0, G_MAXUINT64, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); #endif g_object_class_install_property (gobject_class, PROP_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_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_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_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_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_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_BYTES_TO_SERVE, g_param_spec_uint64 ("bytes-to-serve", "Bytes to serve", "Number of bytes received to serve to clients", 0, G_MAXUINT64, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_BYTES_SERVED, g_param_spec_uint64 ("bytes-served", "Bytes served", "Total number of bytes send to all clients", 0, G_MAXUINT64, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_BURST_FORMAT, g_param_spec_enum ("burst-format", "Burst format", "The format of the burst units (when sync-method is burst[[-with]-keyframe])", GST_TYPE_FORMAT, DEFAULT_BURST_FORMAT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_BURST_VALUE, g_param_spec_uint64 ("burst-value", "Burst value", "The amount of burst expressed in burst-format", 0, G_MAXUINT64, DEFAULT_BURST_VALUE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_QOS_DSCP, g_param_spec_int ("qos-dscp", "QoS diff srv code point", "Quality of Service, differentiated services code point (-1 default)", -1, 63, DEFAULT_QOS_DSCP, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstMultiHandleSink::resend-streamheader * * Resend the streamheaders to existing clients when they change. * * Since: 0.10.23 */ g_object_class_install_property (gobject_class, PROP_RESEND_STREAMHEADER, g_param_spec_boolean ("resend-streamheader", "Resend streamheader", "Resend the streamheader if it changes in the caps", DEFAULT_RESEND_STREAMHEADER, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_NUM_HANDLES, g_param_spec_uint ("num-handles", "Number of handles", "The current number of client handles", 0, G_MAXUINT, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); /** * GstMultiHandleSink::clear: * @gstmultihandlesink: the multihandlesink element to emit this signal on * * Remove all sockets from multihandlesink. Since multihandlesink did not * open sockets itself, it does not explicitly close the sockets. The application * should do so by connecting to the client-socket-removed callback. */ gst_multi_handle_sink_signals[SIGNAL_CLEAR] = g_signal_new ("clear", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstMultiHandleSinkClass, clear), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&sinktemplate)); gst_element_class_set_static_metadata (gstelement_class, "Multi socket sink", "Sink/Network", "Send data to multiple sockets", "Thomas Vander Stichele , " "Wim Taymans , " "Sebastian Dröge "); gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_multi_handle_sink_change_state); gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_multi_handle_sink_render); klass->client_queue_buffer = GST_DEBUG_FUNCPTR (gst_multi_handle_sink_client_queue_buffer); #if 0 klass->add = GST_DEBUG_FUNCPTR (gst_multi_handle_sink_add); klass->add_full = GST_DEBUG_FUNCPTR (gst_multi_handle_sink_add_full); klass->remove = GST_DEBUG_FUNCPTR (gst_multi_handle_sink_remove); klass->remove_flush = GST_DEBUG_FUNCPTR (gst_multi_handle_sink_remove_flush); #endif klass->clear = GST_DEBUG_FUNCPTR (gst_multi_handle_sink_clear); GST_DEBUG_CATEGORY_INIT (multihandlesink_debug, "multihandlesink", 0, "Multi socket sink"); } static void gst_multi_handle_sink_init (GstMultiHandleSink * this) { GST_OBJECT_FLAG_UNSET (this, GST_MULTI_HANDLE_SINK_OPEN); CLIENTS_LOCK_INIT (this); this->clients = NULL; this->bufqueue = g_array_new (FALSE, TRUE, sizeof (GstBuffer *)); this->unit_format = DEFAULT_UNIT_FORMAT; this->units_max = DEFAULT_UNITS_MAX; this->units_soft_max = DEFAULT_UNITS_SOFT_MAX; this->time_min = DEFAULT_TIME_MIN; this->bytes_min = DEFAULT_BYTES_MIN; this->buffers_min = DEFAULT_BUFFERS_MIN; this->recover_policy = DEFAULT_RECOVER_POLICY; this->timeout = DEFAULT_TIMEOUT; this->def_sync_method = DEFAULT_SYNC_METHOD; this->def_burst_format = DEFAULT_BURST_FORMAT; this->def_burst_value = DEFAULT_BURST_VALUE; this->qos_dscp = DEFAULT_QOS_DSCP; this->resend_streamheader = DEFAULT_RESEND_STREAMHEADER; } static void gst_multi_handle_sink_finalize (GObject * object) { GstMultiHandleSink *this; this = GST_MULTI_HANDLE_SINK (object); CLIENTS_LOCK_CLEAR (this); g_array_free (this->bufqueue, TRUE); g_hash_table_destroy (this->handle_hash); G_OBJECT_CLASS (parent_class)->finalize (object); } gint gst_multi_handle_sink_setup_dscp_client (GstMultiHandleSink * sink, GstMultiHandleClient * client) { #ifndef IP_TOS return 0; #else gint tos; gint ret; int fd; union gst_sockaddr { struct sockaddr sa; struct sockaddr_in6 sa_in6; struct sockaddr_storage sa_stor; } sa; socklen_t slen = sizeof (sa); gint af; GstMultiHandleSinkClass *mhsinkclass = GST_MULTI_HANDLE_SINK_GET_CLASS (sink); /* don't touch */ if (sink->qos_dscp < 0) return 0; fd = mhsinkclass->client_get_fd (client); if ((ret = getsockname (fd, &sa.sa, &slen)) < 0) { GST_DEBUG_OBJECT (sink, "could not get sockname: %s", g_strerror (errno)); return ret; } af = sa.sa.sa_family; /* if this is an IPv4-mapped address then do IPv4 QoS */ if (af == AF_INET6) { GST_DEBUG_OBJECT (sink, "check IP6 socket"); if (IN6_IS_ADDR_V4MAPPED (&(sa.sa_in6.sin6_addr))) { GST_DEBUG_OBJECT (sink, "mapped to IPV4"); af = AF_INET; } } /* extract and shift 6 bits of the DSCP */ tos = (sink->qos_dscp & 0x3f) << 2; switch (af) { case AF_INET: ret = setsockopt (fd, IPPROTO_IP, IP_TOS, &tos, sizeof (tos)); break; case AF_INET6: #ifdef IPV6_TCLASS ret = setsockopt (fd, IPPROTO_IPV6, IPV6_TCLASS, &tos, sizeof (tos)); break; #endif default: ret = 0; GST_ERROR_OBJECT (sink, "unsupported AF"); break; } if (ret) GST_DEBUG_OBJECT (sink, "could not set DSCP: %s", g_strerror (errno)); return ret; #endif } void gst_multi_handle_sink_client_init (GstMultiHandleClient * client, GstSyncMethod sync_method) { GTimeVal now; client->status = GST_CLIENT_STATUS_OK; client->bufpos = -1; client->flushcount = -1; client->bufoffset = 0; client->sending = NULL; client->bytes_sent = 0; client->dropped_buffers = 0; client->avg_queue_size = 0; client->first_buffer_ts = GST_CLOCK_TIME_NONE; client->last_buffer_ts = GST_CLOCK_TIME_NONE; client->new_connection = TRUE; client->sync_method = sync_method; client->currently_removing = FALSE; /* update start time */ g_get_current_time (&now); client->connect_time = GST_TIMEVAL_TO_TIME (now); client->disconnect_time = 0; /* set last activity time to connect time */ client->last_activity_time = client->connect_time; } static void gst_multi_handle_sink_setup_dscp (GstMultiHandleSink * mhsink) { GList *clients; CLIENTS_LOCK (mhsink); for (clients = mhsink->clients; clients; clients = clients->next) { GstMultiHandleClient *client; client = clients->data; gst_multi_handle_sink_setup_dscp_client (mhsink, client); } CLIENTS_UNLOCK (mhsink); } void gst_multi_handle_sink_add_full (GstMultiHandleSink * sink, GstMultiSinkHandle handle, GstSyncMethod sync_method, GstFormat min_format, guint64 min_value, GstFormat max_format, guint64 max_value) { GstMultiHandleClient *mhclient; GList *clink; GstMultiHandleSink *mhsink = GST_MULTI_HANDLE_SINK (sink); gchar debug[30]; GstMultiHandleSinkClass *mhsinkclass = GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink); mhsinkclass->handle_debug (handle, debug); GST_DEBUG_OBJECT (sink, "%s adding client, sync_method %d, " "min_format %d, min_value %" G_GUINT64_FORMAT ", max_format %d, max_value %" G_GUINT64_FORMAT, debug, 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; } CLIENTS_LOCK (sink); /* check the hash to find a duplicate handle */ clink = g_hash_table_lookup (mhsink->handle_hash, mhsinkclass->handle_hash_key (handle)); if (clink != NULL) goto duplicate; mhclient = mhsinkclass->new_client (mhsink, handle, sync_method); /* we can add the handle now */ clink = mhsink->clients = g_list_prepend (mhsink->clients, mhclient); g_hash_table_insert (mhsink->handle_hash, mhsinkclass->handle_hash_key (mhclient->handle), clink); mhsink->clients_cookie++; mhclient->burst_min_format = min_format; mhclient->burst_min_value = min_value; mhclient->burst_max_format = max_format; mhclient->burst_max_value = max_value; if (mhsinkclass->hash_changed) mhsinkclass->hash_changed (mhsink); CLIENTS_UNLOCK (sink); mhsinkclass->emit_client_added (mhsink, handle); return; /* errors */ wrong_limits: { GST_WARNING_OBJECT (sink, "%s wrong values min =%" G_GUINT64_FORMAT ", max=%" G_GUINT64_FORMAT ", unit %d specified when adding client", debug, min_value, max_value, min_format); return; } duplicate: { CLIENTS_UNLOCK (sink); GST_WARNING_OBJECT (sink, "%s duplicate client found, refusing", debug); mhsinkclass->emit_client_removed (mhsink, handle, GST_CLIENT_STATUS_DUPLICATE); return; } } /* "add" signal implementation */ void gst_multi_handle_sink_add (GstMultiHandleSink * sink, GstMultiSinkHandle handle) { gst_multi_handle_sink_add_full (sink, handle, sink->def_sync_method, sink->def_burst_format, sink->def_burst_value, sink->def_burst_format, -1); } /* "remove" signal implementation */ void gst_multi_handle_sink_remove (GstMultiHandleSink * sink, GstMultiSinkHandle handle) { GList *clink; GstMultiHandleSink *mhsink = GST_MULTI_HANDLE_SINK (sink); GstMultiHandleSinkClass *mhsinkclass = GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink); gchar debug[30]; mhsinkclass->handle_debug (handle, debug); GST_DEBUG_OBJECT (sink, "%s removing client", debug); CLIENTS_LOCK (sink); clink = g_hash_table_lookup (mhsink->handle_hash, mhsinkclass->handle_hash_key (handle)); if (clink != NULL) { GstMultiHandleClient *mhclient = (GstMultiHandleClient *) clink->data; if (mhclient->status != GST_CLIENT_STATUS_OK) { GST_INFO_OBJECT (sink, "%s Client already disconnecting with status %d", debug, mhclient->status); goto done; } mhclient->status = GST_CLIENT_STATUS_REMOVED; gst_multi_handle_sink_remove_client_link (GST_MULTI_HANDLE_SINK (sink), clink); if (mhsinkclass->hash_changed) mhsinkclass->hash_changed (mhsink); } else { GST_WARNING_OBJECT (sink, "%s no client with this handle found!", debug); } done: CLIENTS_UNLOCK (sink); } /* "remove-flush" signal implementation */ void gst_multi_handle_sink_remove_flush (GstMultiHandleSink * sink, GstMultiSinkHandle handle) { GList *clink; GstMultiHandleSink *mhsink = GST_MULTI_HANDLE_SINK (sink); GstMultiHandleSinkClass *mhsinkclass = GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink); gchar debug[30]; mhsinkclass->handle_debug (handle, debug); GST_DEBUG_OBJECT (sink, "%s flushing client", debug); CLIENTS_LOCK (sink); clink = g_hash_table_lookup (mhsink->handle_hash, mhsinkclass->handle_hash_key (handle)); if (clink != NULL) { GstMultiHandleClient *mhclient = (GstMultiHandleClient *) clink->data; if (mhclient->status != GST_CLIENT_STATUS_OK) { GST_INFO_OBJECT (sink, "%s Client already disconnecting with status %d", mhclient->debug, 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, "%s no client with this handle found!", debug); } done: CLIENTS_UNLOCK (sink); } /* can be called both through the signal (i.e. from any thread) or when * stopping, after the writing thread has shut down */ static void gst_multi_handle_sink_clear (GstMultiHandleSink * mhsink) { GList *clients, *next; guint32 cookie; GstMultiHandleSinkClass *mhsinkclass = GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink); GST_DEBUG_OBJECT (mhsink, "clearing all clients"); CLIENTS_LOCK (mhsink); restart: cookie = mhsink->clients_cookie; for (clients = mhsink->clients; clients; clients = next) { GstMultiHandleClient *mhclient; if (cookie != mhsink->clients_cookie) { GST_DEBUG_OBJECT (mhsink, "cookie changed while removing all clients"); goto restart; } mhclient = (GstMultiHandleClient *) clients->data; next = g_list_next (clients); mhclient->status = GST_CLIENT_STATUS_REMOVED; /* the next call changes the list, which is why we iterate * with a temporary next pointer */ gst_multi_handle_sink_remove_client_link (mhsink, clients); } if (mhsinkclass->hash_changed) mhsinkclass->hash_changed (mhsink); CLIENTS_UNLOCK (mhsink); } /* "get-stats" signal implementation */ GstStructure * gst_multi_handle_sink_get_stats (GstMultiHandleSink * sink, GstMultiSinkHandle handle) { GstMultiHandleClient *client; GstStructure *result = NULL; GList *clink; GstMultiHandleSink *mhsink = GST_MULTI_HANDLE_SINK (sink); GstMultiHandleSinkClass *mhsinkclass = GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink); gchar debug[30]; mhsinkclass->handle_debug (handle, debug); CLIENTS_LOCK (sink); clink = g_hash_table_lookup (mhsink->handle_hash, mhsinkclass->handle_hash_key (handle)); if (clink == NULL) goto noclient; client = clink->data; if (client != NULL) { GstMultiHandleClient *mhclient = (GstMultiHandleClient *) client; guint64 interval; result = gst_structure_new_empty ("multihandlesink-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, "connect-duration", G_TYPE_UINT64, interval, "last-activitity-time", G_TYPE_UINT64, mhclient->last_activity_time, "buffers-dropped", 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, "%s no client with this found!", debug); result = gst_structure_new_empty ("multihandlesink-stats"); } 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-fd-removed signal and * close the fd itself. */ void gst_multi_handle_sink_remove_client_link (GstMultiHandleSink * sink, GList * link) { GTimeVal now; GstMultiHandleClient *mhclient = (GstMultiHandleClient *) link->data; GstMultiHandleSinkClass *mhsinkclass = GST_MULTI_HANDLE_SINK_GET_CLASS (sink); 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, mhclient); break; case GST_CLIENT_STATUS_CLOSED: GST_DEBUG_OBJECT (sink, "%s removing client %p because of close", mhclient->debug, mhclient); break; case GST_CLIENT_STATUS_REMOVED: GST_DEBUG_OBJECT (sink, "%s removing client %p because the app removed it", mhclient->debug, mhclient); break; case GST_CLIENT_STATUS_SLOW: GST_INFO_OBJECT (sink, "%s removing client %p because it was too slow", mhclient->debug, mhclient); break; case GST_CLIENT_STATUS_ERROR: GST_WARNING_OBJECT (sink, "%s removing client %p because of error", mhclient->debug, mhclient); break; case GST_CLIENT_STATUS_FLUSHING: default: GST_WARNING_OBJECT (sink, "%s removing client %p with invalid reason %d", mhclient->debug, mhclient, mhclient->status); break; } mhsinkclass->hash_removing (sink, mhclient); 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); mhsinkclass->emit_client_removed (sink, mhclient->handle, mhclient->status); /* lock again before we remove the client completely */ CLIENTS_LOCK (sink); /* handle cannot be reused in the above signal callback so we can safely * remove it from the hashtable here */ if (!g_hash_table_remove (sink->handle_hash, mhsinkclass->handle_hash_key (mhclient->handle))) { GST_WARNING_OBJECT (sink, "%s error removing client %p from hash", mhclient->debug, mhclient); } /* 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, mhclient); sink->clients_cookie++; if (mhsinkclass->removed) mhsinkclass->removed (sink, mhclient->handle); CLIENTS_UNLOCK (sink); /* sub-class must implement this to emit the client-$handle-removed signal */ g_assert (mhsinkclass->client_free != NULL); /* and the handle is really gone now */ mhsinkclass->client_free (sink, mhclient); g_free (mhclient); CLIENTS_LOCK (sink); } static gboolean gst_multi_handle_sink_client_queue_buffer (GstMultiHandleSink * mhsink, GstMultiHandleClient * mhclient, GstBuffer * buffer) { GstMultiHandleSink *sink = GST_MULTI_HANDLE_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, "%s no previous caps for this client, send streamheader", mhclient->debug); 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, "%s new caps do not have streamheader, not sending", mhclient->debug); } 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, "%s previous caps did not have streamheader, sending", mhclient->debug); send_streamheader = TRUE; } else { /* both old and new caps have streamheader set */ if (!mhsink->resend_streamheader) { GST_DEBUG_OBJECT (sink, "%s asked to not resend the streamheader, not sending", mhclient->debug); 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, "%s new streamheader different from old, sending", mhclient->debug); 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, "%s sending streamheader from caps %" GST_PTR_FORMAT, mhclient->debug, caps); s = gst_caps_get_structure (caps, 0); if (!gst_structure_has_field (s, "streamheader")) { GST_DEBUG_OBJECT (sink, "%s no new streamheader, so nothing to send", mhclient->debug); } else { GST_LOG_OBJECT (sink, "%s sending streamheader from caps %" GST_PTR_FORMAT, mhclient->debug, 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, "%s queueing streamheader buffer of length %" G_GSIZE_FORMAT, mhclient->debug, 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, "%s queueing buffer of length %" G_GSIZE_FORMAT, mhclient->debug, gst_buffer_get_size (buffer)); gst_buffer_ref (buffer); mhclient->sending = g_slist_append (mhclient->sending, buffer); return TRUE; } static gboolean is_sync_frame (GstMultiHandleSink * 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_HEADER)) { return TRUE; } return FALSE; } /* find the keyframe in the list of buffers starting the * search from @idx. @direction as -1 will search backwards, * 1 will search forwards. * Returns: the index or -1 if there is no keyframe after idx. */ gint find_syncframe (GstMultiHandleSink * sink, gint idx, gint direction) { gint i, len, result; /* 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 = idx; i >= 0 && i < len; i += direction) { GstBuffer *buf; buf = g_array_index (sink->bufqueue, GstBuffer *, i); if (is_sync_frame (sink, buf)) { GST_LOG_OBJECT (sink, "found keyframe at %d from %d, direction %d", i, idx, direction); result = i; break; } } return result; } /* Get the number of buffers from the buffer queue needed to satisfy * the maximum max in the configured units. * If units are not BUFFERS, and there are insufficient buffers in the * queue to satify the limit, return len(queue) + 1 */ gint get_buffers_max (GstMultiHandleSink * sink, gint64 max) { switch (sink->unit_format) { case GST_FORMAT_BUFFERS: return max; case GST_FORMAT_TIME: { GstBuffer *buf; int i; int len; gint64 diff; GstClockTime first = GST_CLOCK_TIME_NONE; len = sink->bufqueue->len; for (i = 0; i < len; i++) { buf = g_array_index (sink->bufqueue, GstBuffer *, i); if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) { if (first == -1) first = GST_BUFFER_TIMESTAMP (buf); diff = first - GST_BUFFER_TIMESTAMP (buf); if (diff > max) return i + 1; } } return len + 1; } case GST_FORMAT_BYTES: { GstBuffer *buf; int i; int len; gint acc = 0; len = sink->bufqueue->len; for (i = 0; i < len; i++) { buf = g_array_index (sink->bufqueue, GstBuffer *, i); acc += gst_buffer_get_size (buf); if (acc > max) return i + 1; } return len + 1; } default: return max; } } /* find the positions in the buffer queue where *_min and *_max * is satisfied */ /* count the amount of data in the buffers and return the index * that satifies the given limits. * * Returns: index @idx in the buffer queue so that the given limits are * satisfied. TRUE if all the limits could be satisfied, FALSE if not * enough data was in the queue. * * FIXME, this code might now work if any of the units is in buffers... */ gboolean find_limits (GstMultiHandleSink * sink, gint * min_idx, gint bytes_min, gint buffers_min, gint64 time_min, gint * max_idx, gint bytes_max, gint buffers_max, gint64 time_max) { GstClockTime first, time; gint i, len, bytes; gboolean result, max_hit; /* take length of queue */ len = sink->bufqueue->len; /* this must hold */ g_assert (len > 0); GST_LOG_OBJECT (sink, "bytes_min %d, buffers_min %d, time_min %" GST_TIME_FORMAT ", bytes_max %d, buffers_max %d, time_max %" GST_TIME_FORMAT, bytes_min, buffers_min, GST_TIME_ARGS (time_min), bytes_max, buffers_max, GST_TIME_ARGS (time_max)); /* do the trivial buffer limit test */ if (buffers_min != -1 && len < buffers_min) { *min_idx = len - 1; *max_idx = len - 1; return FALSE; } result = FALSE; /* else count bytes and time */ first = -1; bytes = 0; /* unset limits */ *min_idx = -1; *max_idx = -1; max_hit = FALSE; i = 0; /* loop through the buffers, when a limit is ok, mark it * as -1, we have at least one buffer in the queue. */ do { GstBuffer *buf; /* if we checked all min limits, update result */ if (bytes_min == -1 && time_min == -1 && *min_idx == -1) { /* don't go below 0 */ *min_idx = MAX (i - 1, 0); } /* if we reached one max limit break out */ if (max_hit) { /* i > 0 when we get here, we subtract one to get the position * of the previous buffer. */ *max_idx = i - 1; /* we have valid complete result if we found a min_idx too */ result = *min_idx != -1; break; } buf = g_array_index (sink->bufqueue, GstBuffer *, i); bytes += gst_buffer_get_size (buf); /* take timestamp and save for the base first timestamp */ if ((time = GST_BUFFER_TIMESTAMP (buf)) != -1) { GST_LOG_OBJECT (sink, "Ts %" GST_TIME_FORMAT " on buffer", GST_TIME_ARGS (time)); if (first == -1) first = time; /* increase max usage if we did not fill enough. Note that * buffers are sorted from new to old, so the first timestamp is * bigger than the next one. */ if (time_min != -1 && first - time >= time_min) time_min = -1; if (time_max != -1 && first - time >= time_max) max_hit = TRUE; } else { GST_LOG_OBJECT (sink, "No timestamp on buffer"); } /* time is OK or unknown, check and increase if not enough bytes */ if (bytes_min != -1) { if (bytes >= bytes_min) bytes_min = -1; } if (bytes_max != -1) { if (bytes >= bytes_max) { max_hit = TRUE; } } i++; } while (i < len); /* if we did not hit the max or min limit, set to buffer size */ if (*max_idx == -1) *max_idx = len - 1; /* make sure min does not exceed max */ if (*min_idx == -1) *min_idx = *max_idx; return result; } /* parse the unit/value pair and assign it to the result value of the * right type, leave the other values untouched * * Returns: FALSE if the unit is unknown or undefined. TRUE otherwise. */ static gboolean assign_value (GstFormat format, guint64 value, gint * bytes, gint * buffers, GstClockTime * time) { gboolean res = TRUE; /* set only the limit of the given format to the given value */ switch (format) { case GST_FORMAT_BUFFERS: *buffers = (gint) value; break; case GST_FORMAT_TIME: *time = value; break; case GST_FORMAT_BYTES: *bytes = (gint) value; break; case GST_FORMAT_UNDEFINED: default: res = FALSE; break; } return res; } /* count the index in the buffer queue to satisfy the given unit * and value pair starting from buffer at index 0. * * Returns: TRUE if there was enough data in the queue to satisfy the * burst values. @idx contains the index in the buffer that contains enough * data to satisfy the limits or the last buffer in the queue when the * function returns FALSE. */ static gboolean count_burst_unit (GstMultiHandleSink * sink, gint * min_idx, GstFormat min_format, guint64 min_value, gint * max_idx, GstFormat max_format, guint64 max_value) { gint bytes_min = -1, buffers_min = -1; gint bytes_max = -1, buffers_max = -1; GstClockTime time_min = GST_CLOCK_TIME_NONE, time_max = GST_CLOCK_TIME_NONE; assign_value (min_format, min_value, &bytes_min, &buffers_min, &time_min); assign_value (max_format, max_value, &bytes_max, &buffers_max, &time_max); return find_limits (sink, min_idx, bytes_min, buffers_min, time_min, max_idx, bytes_max, buffers_max, time_max); } /* decide where in the current buffer queue this new client should start * receiving buffers from. * This function is called whenever a client is connected and has not yet * received a buffer. * If this returns -1, it means that we haven't found a good point to * start streaming from yet, and this function should be called again later * when more buffers have arrived. */ gint gst_multi_handle_sink_new_client_position (GstMultiHandleSink * sink, GstMultiHandleClient * client) { gint result; GST_DEBUG_OBJECT (sink, "%s new client, deciding where to start in queue", client->debug); GST_DEBUG_OBJECT (sink, "queue is currently %d buffers long", sink->bufqueue->len); switch (client->sync_method) { case GST_SYNC_METHOD_LATEST: /* no syncing, we are happy with whatever the client is going to get */ result = client->bufpos; GST_DEBUG_OBJECT (sink, "%s SYNC_METHOD_LATEST, position %d", client->debug, result); break; case GST_SYNC_METHOD_NEXT_KEYFRAME: { /* if one of the new buffers (between client->bufpos and 0) in the queue * is a sync point, we can proceed, otherwise we need to keep waiting */ GST_LOG_OBJECT (sink, "%s new client, bufpos %d, waiting for keyframe", client->debug, client->bufpos); result = find_prev_syncframe (sink, client->bufpos); if (result != -1) { GST_DEBUG_OBJECT (sink, "%s SYNC_METHOD_NEXT_KEYFRAME: result %d", client->debug, result); break; } /* client is not on a syncbuffer, need to skip these buffers and * wait some more */ GST_LOG_OBJECT (sink, "%s new client, skipping buffer(s), no syncpoint found", client->debug); client->bufpos = -1; break; } case GST_SYNC_METHOD_LATEST_KEYFRAME: { GST_DEBUG_OBJECT (sink, "%s SYNC_METHOD_LATEST_KEYFRAME", client->debug); /* for new clients we initially scan the complete buffer queue for * a sync point when a buffer is added. If we don't find a keyframe, * we need to wait for the next keyframe and so we change the client's * sync method to GST_SYNC_METHOD_NEXT_KEYFRAME. */ result = find_next_syncframe (sink, 0); if (result != -1) { GST_DEBUG_OBJECT (sink, "%s SYNC_METHOD_LATEST_KEYFRAME: result %d", client->debug, result); break; } GST_DEBUG_OBJECT (sink, "%s SYNC_METHOD_LATEST_KEYFRAME: no keyframe found, " "switching to SYNC_METHOD_NEXT_KEYFRAME", client->debug); /* throw client to the waiting state */ client->bufpos = -1; /* and make client sync to next keyframe */ client->sync_method = GST_SYNC_METHOD_NEXT_KEYFRAME; break; } case GST_SYNC_METHOD_BURST: { gboolean ok; gint max; /* move to the position where we satisfy the client's burst * parameters. If we could not satisfy the parameters because there * is not enough data, we just send what we have (which is in result). * We use the max value to limit the search */ ok = count_burst_unit (sink, &result, client->burst_min_format, client->burst_min_value, &max, client->burst_max_format, client->burst_max_value); GST_DEBUG_OBJECT (sink, "%s SYNC_METHOD_BURST: burst_unit returned %d, result %d", client->debug, ok, result); GST_LOG_OBJECT (sink, "min %d, max %d", result, max); /* we hit the max and it is below the min, use that then */ if (max != -1 && max <= result) { result = MAX (max - 1, 0); GST_DEBUG_OBJECT (sink, "%s SYNC_METHOD_BURST: result above max, taken down to %d", client->debug, result); } break; } case GST_SYNC_METHOD_BURST_KEYFRAME: { gint min_idx, max_idx; gint next_syncframe, prev_syncframe; /* BURST_KEYFRAME: * * _always_ start sending a keyframe to the client. We first search * a keyframe between min/max limits. If there is none, we send it the * last keyframe before min. If there is none, the behaviour is like * NEXT_KEYFRAME. */ /* gather burst limits */ count_burst_unit (sink, &min_idx, client->burst_min_format, client->burst_min_value, &max_idx, client->burst_max_format, client->burst_max_value); GST_LOG_OBJECT (sink, "min %d, max %d", min_idx, max_idx); /* first find a keyframe after min_idx */ next_syncframe = find_next_syncframe (sink, min_idx); if (next_syncframe != -1 && next_syncframe < max_idx) { /* we have a valid keyframe and it's below the max */ GST_LOG_OBJECT (sink, "found keyframe in min/max limits"); result = next_syncframe; break; } /* no valid keyframe, try to find one below min */ prev_syncframe = find_prev_syncframe (sink, min_idx); if (prev_syncframe != -1) { GST_WARNING_OBJECT (sink, "using keyframe below min in BURST_KEYFRAME sync mode"); result = prev_syncframe; break; } /* no prev keyframe or not enough data */ GST_WARNING_OBJECT (sink, "no prev keyframe found in BURST_KEYFRAME sync mode, waiting for next"); /* throw client to the waiting state */ client->bufpos = -1; /* and make client sync to next keyframe */ client->sync_method = GST_SYNC_METHOD_NEXT_KEYFRAME; result = -1; break; } case GST_SYNC_METHOD_BURST_WITH_KEYFRAME: { gint min_idx, max_idx; gint next_syncframe; /* BURST_WITH_KEYFRAME: * * try to start sending a keyframe to the client. We first search * a keyframe between min/max limits. If there is none, we send it the * amount of data up 'till min. */ /* gather enough data to burst */ count_burst_unit (sink, &min_idx, client->burst_min_format, client->burst_min_value, &max_idx, client->burst_max_format, client->burst_max_value); GST_LOG_OBJECT (sink, "min %d, max %d", min_idx, max_idx); /* first find a keyframe after min_idx */ next_syncframe = find_next_syncframe (sink, min_idx); if (next_syncframe != -1 && next_syncframe < max_idx) { /* we have a valid keyframe and it's below the max */ GST_LOG_OBJECT (sink, "found keyframe in min/max limits"); result = next_syncframe; break; } /* no keyframe, send data from min_idx */ GST_WARNING_OBJECT (sink, "using min in BURST_WITH_KEYFRAME sync mode"); /* make sure we don't go over the max limit */ if (max_idx != -1 && max_idx <= min_idx) { result = MAX (max_idx - 1, 0); } else { result = min_idx; } break; } default: g_warning ("unknown sync method %d", client->sync_method); result = client->bufpos; break; } return result; } /* calculate the new position for a client after recovery. This function * does not update the client position but merely returns the required * position. */ gint gst_multi_handle_sink_recover_client (GstMultiHandleSink * sink, GstMultiHandleClient * client) { gint newbufpos; GST_WARNING_OBJECT (sink, "%s client %p is lagging at %d, recover using policy %d", client->debug, 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 = get_buffers_max (sink, 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, get_buffers_max (sink, 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 = get_buffers_max (sink, sink->units_soft_max); break; } return newbufpos; } /* 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_handle_sink_queue_buffer (GstMultiHandleSink * mhsink, GstBuffer * buffer) { GList *clients, *next; gint queuelen; gboolean hash_changed = FALSE; gint max_buffer_usage; gint i; GTimeVal nowtv; GstClockTime now; gint max_buffers, soft_max_buffers; guint cookie; GstMultiHandleSink *sink = GST_MULTI_HANDLE_SINK (mhsink); GstMultiHandleSinkClass *mhsinkclass = GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink); g_get_current_time (&nowtv); now = GST_TIMEVAL_TO_TIME (nowtv); CLIENTS_LOCK (mhsink); /* add buffer to queue */ g_array_prepend_val (mhsink->bufqueue, buffer); 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) { GstMultiHandleClient *mhclient = clients->data; if (cookie != mhsink->clients_cookie) { GST_DEBUG_OBJECT (sink, "Clients cookie outdated, restarting"); goto restart; } next = g_list_next (clients); mhclient->bufpos++; GST_LOG_OBJECT (sink, "%s client %p at position %d", mhclient->debug, mhclient, 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, "%s client %p position reset to %d", mhclient->debug, mhclient, mhclient->bufpos); } else { GST_INFO_OBJECT (sink, "%s client %p not recovering position", mhclient->debug, mhclient); } } /* 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, "%s client %p is too slow, removing", mhclient->debug, mhclient); /* remove the client, the handle 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; gst_multi_handle_sink_remove_client_link (mhsink, clients); hash_changed = TRUE; continue; } else if (mhclient->bufpos == 0 || mhclient->new_connection) { /* can send data to this client now. need to signal the select thread that * the handle_set changed */ mhsinkclass->hash_adding (mhsink, mhclient); hash_changed = TRUE; } /* 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); /* and send a signal to thread if handle_set changed */ if (hash_changed && mhsinkclass->hash_changed) { mhsinkclass->hash_changed (mhsink); } } static GstFlowReturn gst_multi_handle_sink_render (GstBaseSink * bsink, GstBuffer * buf) { gboolean in_caps; #if 0 GstCaps *bufcaps, *padcaps; #endif GstMultiHandleSink *sink = GST_MULTI_HANDLE_SINK (bsink); g_return_val_if_fail (GST_OBJECT_FLAG_IS_SET (sink, GST_MULTI_HANDLE_SINK_OPEN), GST_FLOW_FLUSHING); #if 0 /* since we check every buffer for streamheader caps, we need to make * sure every buffer has caps set */ bufcaps = gst_buffer_get_caps (buf); padcaps = GST_PAD_CAPS (GST_BASE_SINK_PAD (bsink)); /* make sure we have caps on the pad */ if (!padcaps && !bufcaps) goto no_caps; #endif /* get IN_CAPS first, code below might mess with the flags */ in_caps = GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_HEADER); #if 0 /* stamp the buffer with previous caps if no caps set */ if (!bufcaps) { if (!gst_buffer_is_writable (buf)) { /* metadata is not writable, copy will be made and original buffer * will be unreffed so we need to ref so that we don't lose the * buffer in the render method. */ gst_buffer_ref (buf); /* the new buffer is ours only, we keep it out of the scope of this * function */ buf = gst_buffer_make_writable (buf); } else { /* else the metadata is writable, we ref because we keep the buffer * out of the scope of this method */ gst_buffer_ref (buf); } /* buffer metadata is writable now, set the caps */ gst_buffer_set_caps (buf, padcaps); } else { gst_caps_unref (bufcaps); /* since we keep this buffer out of the scope of this method */ gst_buffer_ref (buf); } #endif gst_buffer_ref (buf); GST_LOG_OBJECT (sink, "received buffer %p, in_caps: %s, offset %" G_GINT64_FORMAT ", offset_end %" G_GINT64_FORMAT ", timestamp %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT, buf, in_caps ? "yes" : "no", GST_BUFFER_OFFSET (buf), GST_BUFFER_OFFSET_END (buf), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), GST_TIME_ARGS (GST_BUFFER_DURATION (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 (in_caps && sink->previous_buffer_in_caps == FALSE) { GST_DEBUG_OBJECT (sink, "receiving new HEADER buffers, clearing old streamheader"); g_slist_foreach (sink->streamheader, (GFunc) gst_mini_object_unref, NULL); g_slist_free (sink->streamheader); sink->streamheader = NULL; } /* save the current in_caps */ sink->previous_buffer_in_caps = in_caps; /* 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. * FIXME: we could check if the buffer's contents are in fact part of the * current streamheader. * * We don't send the buffer to the client, since streamheaders are sent * separately when necessary. */ if (in_caps) { GST_DEBUG_OBJECT (sink, "appending HEADER buffer with length %" G_GSIZE_FORMAT " to streamheader", gst_buffer_get_size (buf)); sink->streamheader = g_slist_append (sink->streamheader, buf); } else { /* queue the buffer, this is a regular data buffer. */ gst_multi_handle_sink_queue_buffer (sink, buf); sink->bytes_to_serve += gst_buffer_get_size (buf); } return GST_FLOW_OK; /* ERRORS */ #if 0 no_caps: { GST_ELEMENT_ERROR (sink, CORE, NEGOTIATION, (NULL), ("Received first buffer without caps set")); return GST_FLOW_NOT_NEGOTIATED; } #endif } static void gst_multi_handle_sink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstMultiHandleSink *multihandlesink; multihandlesink = GST_MULTI_HANDLE_SINK (object); switch (prop_id) { case PROP_BUFFERS_MAX: multihandlesink->units_max = g_value_get_int (value); break; case PROP_BUFFERS_SOFT_MAX: multihandlesink->units_soft_max = g_value_get_int (value); break; case PROP_TIME_MIN: multihandlesink->time_min = g_value_get_int64 (value); break; case PROP_BYTES_MIN: multihandlesink->bytes_min = g_value_get_int (value); break; case PROP_BUFFERS_MIN: multihandlesink->buffers_min = g_value_get_int (value); break; case PROP_UNIT_FORMAT: multihandlesink->unit_format = g_value_get_enum (value); break; case PROP_UNITS_MAX: multihandlesink->units_max = g_value_get_int64 (value); break; case PROP_UNITS_SOFT_MAX: multihandlesink->units_soft_max = g_value_get_int64 (value); break; case PROP_RECOVER_POLICY: multihandlesink->recover_policy = g_value_get_enum (value); break; case PROP_TIMEOUT: multihandlesink->timeout = g_value_get_uint64 (value); break; case PROP_SYNC_METHOD: multihandlesink->def_sync_method = g_value_get_enum (value); break; case PROP_BURST_FORMAT: multihandlesink->def_burst_format = g_value_get_enum (value); break; case PROP_BURST_VALUE: multihandlesink->def_burst_value = g_value_get_uint64 (value); break; case PROP_QOS_DSCP: multihandlesink->qos_dscp = g_value_get_int (value); gst_multi_handle_sink_setup_dscp (multihandlesink); break; case PROP_RESEND_STREAMHEADER: multihandlesink->resend_streamheader = g_value_get_boolean (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_multi_handle_sink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstMultiHandleSink *multihandlesink; multihandlesink = GST_MULTI_HANDLE_SINK (object); switch (prop_id) { case PROP_BUFFERS_MAX: g_value_set_int (value, multihandlesink->units_max); break; case PROP_BUFFERS_SOFT_MAX: g_value_set_int (value, multihandlesink->units_soft_max); break; case PROP_TIME_MIN: g_value_set_int64 (value, multihandlesink->time_min); break; case PROP_BYTES_MIN: g_value_set_int (value, multihandlesink->bytes_min); break; case PROP_BUFFERS_MIN: g_value_set_int (value, multihandlesink->buffers_min); break; case PROP_BUFFERS_QUEUED: g_value_set_uint (value, multihandlesink->buffers_queued); break; case PROP_BYTES_QUEUED: g_value_set_uint (value, multihandlesink->bytes_queued); break; case PROP_TIME_QUEUED: g_value_set_uint64 (value, multihandlesink->time_queued); break; case PROP_UNIT_FORMAT: g_value_set_enum (value, multihandlesink->unit_format); break; case PROP_UNITS_MAX: g_value_set_int64 (value, multihandlesink->units_max); break; case PROP_UNITS_SOFT_MAX: g_value_set_int64 (value, multihandlesink->units_soft_max); break; case PROP_RECOVER_POLICY: g_value_set_enum (value, multihandlesink->recover_policy); break; case PROP_TIMEOUT: g_value_set_uint64 (value, multihandlesink->timeout); break; case PROP_SYNC_METHOD: g_value_set_enum (value, multihandlesink->def_sync_method); break; case PROP_BYTES_TO_SERVE: g_value_set_uint64 (value, multihandlesink->bytes_to_serve); break; case PROP_BYTES_SERVED: g_value_set_uint64 (value, multihandlesink->bytes_served); break; case PROP_BURST_FORMAT: g_value_set_enum (value, multihandlesink->def_burst_format); break; case PROP_BURST_VALUE: g_value_set_uint64 (value, multihandlesink->def_burst_value); break; case PROP_QOS_DSCP: g_value_set_int (value, multihandlesink->qos_dscp); break; case PROP_RESEND_STREAMHEADER: g_value_set_boolean (value, multihandlesink->resend_streamheader); break; case PROP_NUM_HANDLES: g_value_set_uint (value, g_hash_table_size (multihandlesink->handle_hash)); 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_handle_sink_start (GstBaseSink * bsink) { GstMultiHandleSinkClass *mhsclass; GstMultiHandleSink *mhsink; if (GST_OBJECT_FLAG_IS_SET (bsink, GST_MULTI_HANDLE_SINK_OPEN)) return TRUE; mhsink = GST_MULTI_HANDLE_SINK (bsink); mhsclass = GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink); if (!mhsclass->start_pre (mhsink)) return FALSE; mhsink->streamheader = NULL; mhsink->bytes_to_serve = 0; mhsink->bytes_served = 0; if (mhsclass->init) { mhsclass->init (mhsink); } mhsink->running = TRUE; mhsink->thread = g_thread_new ("multihandlesink", (GThreadFunc) mhsclass->thread, mhsink); GST_OBJECT_FLAG_SET (bsink, GST_MULTI_HANDLE_SINK_OPEN); return TRUE; } static gboolean gst_multi_handle_sink_stop (GstBaseSink * bsink) { GstMultiHandleSinkClass *mhclass; GstBuffer *buf; gint i; GstMultiHandleSink *mhsink = GST_MULTI_HANDLE_SINK (bsink); mhclass = GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink); if (!GST_OBJECT_FLAG_IS_SET (bsink, GST_MULTI_HANDLE_SINK_OPEN)) return TRUE; mhsink->running = FALSE; mhclass->stop_pre (mhsink); if (mhsink->thread) { GST_DEBUG_OBJECT (mhsink, "joining thread"); g_thread_join (mhsink->thread); GST_DEBUG_OBJECT (mhsink, "joined thread"); mhsink->thread = NULL; } /* free the clients */ mhclass->clear (GST_MULTI_HANDLE_SINK (mhsink)); if (mhsink->streamheader) { g_slist_foreach (mhsink->streamheader, (GFunc) gst_mini_object_unref, NULL); g_slist_free (mhsink->streamheader); mhsink->streamheader = NULL; } if (mhclass->close) mhclass->close (mhsink); mhclass->stop_post (mhsink); /* remove all queued buffers */ if (mhsink->bufqueue) { GST_DEBUG_OBJECT (mhsink, "Emptying bufqueue with %d buffers", mhsink->bufqueue->len); for (i = mhsink->bufqueue->len - 1; i >= 0; --i) { buf = g_array_index (mhsink->bufqueue, GstBuffer *, i); GST_LOG_OBJECT (mhsink, "Removing buffer %p (%d) with refcount %d", buf, i, GST_MINI_OBJECT_REFCOUNT (buf)); gst_buffer_unref (buf); mhsink->bufqueue = g_array_remove_index (mhsink->bufqueue, i); } /* freeing the array is done in _finalize */ } GST_OBJECT_FLAG_UNSET (mhsink, GST_MULTI_HANDLE_SINK_OPEN); return TRUE; } static GstStateChangeReturn gst_multi_handle_sink_change_state (GstElement * element, GstStateChange transition) { GstMultiHandleSink *sink; GstStateChangeReturn ret; sink = GST_MULTI_HANDLE_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_handle_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_handle_sink_stop (GST_BASE_SINK (sink)); break; default: break; } return ret; /* ERRORS */ start_failed: { /* error message was posted */ return GST_STATE_CHANGE_FAILURE; } }