/* GStreamer * Copyright (C) <2018> Marc Leeman * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ /** * SECTION: gstrtsinkp * @title: GstRtpSink * @short description: element with Uri interface to stream RTP data to * the network. * * RTP (RFC 3550) is a protocol to stream media over the network while * retaining the timing information and providing enough information to * reconstruct the correct timing domain by the receiver. * * The RTP data port should be even, while the RTCP port should be * odd. The URI that is entered defines the data port, the RTCP port will * be allocated to the next port. * * This element hooks up the correct sockets to support both RTP as the * accompanying RTCP layer. * * This Bin handles streaming RTP payloaded data on the network. * * This element also implements the URI scheme `rtp://` allowing to send * data on the network by bins that allow use the URI to determine the sink. * The RTP URI handler also allows setting properties through the URI query. */ #ifdef HAVE_CONFIG_H #include #endif #include #include "gstrtpsink.h" #include "gstrtp-utils.h" GST_DEBUG_CATEGORY_STATIC (gst_rtp_sink_debug); #define GST_CAT_DEFAULT gst_rtp_sink_debug #define DEFAULT_PROP_TTL 64 #define DEFAULT_PROP_TTL_MC 1 #define DEFAULT_PROP_ADDRESS "0.0.0.0" #define DEFAULT_PROP_PORT 5004 #define DEFAULT_PROP_URI "rtp://"DEFAULT_PROP_ADDRESS":"G_STRINGIFY(DEFAULT_PROP_PORT) #define DEFAULT_PROP_MULTICAST_IFACE NULL enum { PROP_0, PROP_URI, PROP_ADDRESS, PROP_PORT, PROP_TTL, PROP_TTL_MC, PROP_MULTICAST_IFACE, PROP_LAST }; static void gst_rtp_sink_uri_handler_init (gpointer g_iface, gpointer iface_data); #define gst_rtp_sink_parent_class parent_class G_DEFINE_TYPE_WITH_CODE (GstRtpSink, gst_rtp_sink, GST_TYPE_BIN, G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER, gst_rtp_sink_uri_handler_init); GST_DEBUG_CATEGORY_INIT (gst_rtp_sink_debug, "rtpsink", 0, "RTP Sink")); GST_ELEMENT_REGISTER_DEFINE (rtpsink, "rtpsink", GST_RANK_PRIMARY + 1, GST_TYPE_RTP_SINK); #define GST_RTP_SINK_GET_LOCK(obj) (&((GstRtpSink*)(obj))->lock) #define GST_RTP_SINK_LOCK(obj) (g_mutex_lock (GST_RTP_SINK_GET_LOCK(obj))) #define GST_RTP_SINK_UNLOCK(obj) (g_mutex_unlock (GST_RTP_SINK_GET_LOCK(obj))) static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink_%u", GST_PAD_SINK, GST_PAD_REQUEST, GST_STATIC_CAPS ("application/x-rtp")); static GstStateChangeReturn gst_rtp_sink_change_state (GstElement * element, GstStateChange transition); static void gst_rtp_sink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstRtpSink *self = GST_RTP_SINK (object); switch (prop_id) { case PROP_URI:{ GstUri *uri = NULL; GST_RTP_SINK_LOCK (object); uri = gst_uri_from_string (g_value_get_string (value)); if (uri == NULL) break; if (self->uri) gst_uri_unref (self->uri); self->uri = uri; gst_rtp_utils_set_properties_from_uri_query (G_OBJECT (self), self->uri); g_object_set (self, "address", gst_uri_get_host (self->uri), NULL); g_object_set (self, "port", gst_uri_get_port (self->uri), NULL); GST_RTP_SINK_UNLOCK (object); break; } case PROP_ADDRESS: gst_uri_set_host (self->uri, g_value_get_string (value)); g_object_set_property (G_OBJECT (self->rtp_sink), "host", value); g_object_set_property (G_OBJECT (self->rtcp_sink), "host", value); break; case PROP_PORT:{ guint port = g_value_get_uint (value); /* According to RFC 3550, 11, RTCP receiver port should be even * number and RTCP port should be the RTP port + 1 */ if (port & 0x1) GST_WARNING_OBJECT (self, "Port %u is odd, this is not standard (see RFC 3550).", port); gst_uri_set_port (self->uri, port); g_object_set (self->rtp_sink, "port", port, NULL); g_object_set (self->rtcp_sink, "port", port + 1, NULL); break; } case PROP_TTL: self->ttl = g_value_get_int (value); g_object_set (self->rtp_sink, "ttl", self->ttl, NULL); g_object_set (self->rtcp_sink, "ttl", self->ttl, NULL); break; case PROP_TTL_MC: self->ttl_mc = g_value_get_int (value); g_object_set (self->rtp_sink, "ttl-mc", self->ttl_mc, NULL); g_object_set (self->rtcp_sink, "ttl-mc", self->ttl_mc, NULL); break; case PROP_MULTICAST_IFACE: g_free (self->multi_iface); if (g_value_get_string (value) == NULL) self->multi_iface = g_strdup (DEFAULT_PROP_MULTICAST_IFACE); else self->multi_iface = g_value_dup_string (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_rtp_sink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstRtpSink *self = GST_RTP_SINK (object); switch (prop_id) { case PROP_URI: GST_RTP_SINK_LOCK (object); if (self->uri) g_value_take_string (value, gst_uri_to_string (self->uri)); else g_value_set_string (value, NULL); GST_RTP_SINK_UNLOCK (object); break; case PROP_ADDRESS: g_value_set_string (value, gst_uri_get_host (self->uri)); break; case PROP_PORT: g_value_set_uint (value, gst_uri_get_port (self->uri)); break; case PROP_TTL: g_value_set_int (value, self->ttl); break; case PROP_TTL_MC: g_value_set_int (value, self->ttl_mc); break; case PROP_MULTICAST_IFACE: g_value_set_string (value, self->multi_iface); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_rtp_sink_finalize (GObject * gobject) { GstRtpSink *self = GST_RTP_SINK (gobject); if (self->uri) gst_uri_unref (self->uri); g_free (self->multi_iface); g_mutex_clear (&self->lock); G_OBJECT_CLASS (parent_class)->finalize (gobject); } static gboolean gst_rtp_sink_setup_elements (GstRtpSink * self) { /*GstPad *pad; */ gchar name[48]; /* pads are all named */ g_snprintf (name, 48, "send_rtp_src_%u", GST_ELEMENT (self)->numpads); gst_element_link_pads (self->rtpbin, name, self->funnel_rtp, "sink_%u"); g_snprintf (name, 48, "send_rtcp_src_%u", GST_ELEMENT (self)->numpads); gst_element_link_pads (self->rtpbin, name, self->funnel_rtcp, "sink_%u"); g_snprintf (name, 48, "recv_rtcp_sink_%u", GST_ELEMENT (self)->numpads); gst_element_link_pads (self->rtcp_src, "src", self->rtpbin, name); return TRUE; } static GstPad * gst_rtp_sink_request_new_pad (GstElement * element, GstPadTemplate * templ, const gchar * name, const GstCaps * caps) { GstRtpSink *self = GST_RTP_SINK (element); GstPad *rpad, *pad = NULL; if (self->rtpbin == NULL) { GST_ELEMENT_ERROR (self, CORE, MISSING_PLUGIN, (NULL), ("%s", "rtpbin element is not available")); return NULL; } if (gst_rtp_sink_setup_elements (self) == FALSE) return NULL; GST_RTP_SINK_LOCK (self); rpad = gst_element_request_pad_simple (self->rtpbin, "send_rtp_sink_%u"); if (rpad) { pad = gst_ghost_pad_new (GST_PAD_NAME (rpad), rpad); gst_element_add_pad (element, pad); gst_clear_object (&rpad); } GST_RTP_SINK_UNLOCK (self); g_return_val_if_fail (pad != NULL, NULL); return pad; } static void gst_rtp_sink_release_pad (GstElement * element, GstPad * pad) { GstRtpSink *self = GST_RTP_SINK (element); GstPad *rpad = gst_ghost_pad_get_target (GST_GHOST_PAD (pad)); GST_RTP_SINK_LOCK (self); gst_element_release_request_pad (self->rtpbin, rpad); gst_object_unref (rpad); gst_pad_set_active (pad, FALSE); gst_element_remove_pad (GST_ELEMENT (self), pad); GST_RTP_SINK_UNLOCK (self); } static void gst_rtp_sink_class_init (GstRtpSinkClass * klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass); gobject_class->set_property = gst_rtp_sink_set_property; gobject_class->get_property = gst_rtp_sink_get_property; gobject_class->finalize = gst_rtp_sink_finalize; gstelement_class->change_state = gst_rtp_sink_change_state; gstelement_class->request_new_pad = GST_DEBUG_FUNCPTR (gst_rtp_sink_request_new_pad); gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_rtp_sink_release_pad); /** * GstRtpSink:uri: * * uri to stream RTP to. All GStreamer parameters can be * encoded in the URI, this URI format is RFC compliant. */ g_object_class_install_property (gobject_class, PROP_URI, g_param_spec_string ("uri", "URI", "URI in the form of rtp://host:port?query", DEFAULT_PROP_URI, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstRtpSink:address: * * Address to receive packets from (can be IPv4 or IPv6). */ g_object_class_install_property (gobject_class, PROP_ADDRESS, g_param_spec_string ("address", "Address", "Address to send packets to (can be IPv4 or IPv6).", DEFAULT_PROP_ADDRESS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstRtpSink:port: * * The port to listen to RTP packets, the RTCP port is this value * +1. This port must be an even number. */ g_object_class_install_property (gobject_class, PROP_PORT, g_param_spec_uint ("port", "Port", "The port RTP packets will be sent, " "the RTCP port is this value + 1. This port must be an even number.", 2, 65534, DEFAULT_PROP_PORT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT)); /** * GstRtpSink:ttl: * * Set the unicast TTL parameter. */ g_object_class_install_property (gobject_class, PROP_TTL, g_param_spec_int ("ttl", "Unicast TTL", "Used for setting the unicast TTL parameter", 0, 255, DEFAULT_PROP_TTL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstRtpSink:ttl-mc: * * Set the multicast TTL parameter. */ g_object_class_install_property (gobject_class, PROP_TTL_MC, g_param_spec_int ("ttl-mc", "Multicast TTL", "Used for setting the multicast TTL parameter", 0, 255, DEFAULT_PROP_TTL_MC, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /* GstRtpSink:multicast-iface: * * The networkinterface on which to join the multicast group */ g_object_class_install_property (gobject_class, PROP_MULTICAST_IFACE, g_param_spec_string ("multicast-iface", "Multicast Interface", "The network interface on which to join the multicast group." "This allows multiple interfaces separated by comma. (\"eth0,eth1\")", DEFAULT_PROP_MULTICAST_IFACE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&sink_template)); gst_element_class_set_static_metadata (gstelement_class, "RTP Sink element", "Generic/Bin/Sink", "Simple RTP sink", "Marc Leeman "); } static void gst_rtp_sink_rtpbin_element_added_cb (GstBin * element, GstElement * new_element, gpointer data) { GstRtpSink *self = GST_RTP_SINK (data); GST_INFO_OBJECT (self, "Element %" GST_PTR_FORMAT " added element %" GST_PTR_FORMAT ".", element, new_element); } static void gst_rtp_sink_rtpbin_pad_added_cb (GstElement * element, GstPad * pad, gpointer data) { GstRtpSink *self = GST_RTP_SINK (data); GstCaps *caps = gst_pad_query_caps (pad, NULL); GstPad *upad; /* Expose RTP data pad only */ GST_INFO_OBJECT (self, "Element %" GST_PTR_FORMAT " added pad %" GST_PTR_FORMAT "with caps %" GST_PTR_FORMAT ".", element, pad, caps); /* Sanity checks */ if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) { /* Src pad, do not expose */ gst_caps_unref (caps); return; } if (G_LIKELY (caps)) { GstCaps *ref_caps = gst_caps_new_empty_simple ("application/x-rtcp"); if (gst_caps_can_intersect (caps, ref_caps)) { /* SRC RTCP caps, do not expose */ gst_caps_unref (ref_caps); gst_caps_unref (caps); return; } gst_caps_unref (ref_caps); } else { GST_ERROR_OBJECT (self, "Pad with no caps detected."); gst_caps_unref (caps); return; } gst_caps_unref (caps); upad = gst_element_get_compatible_pad (self->funnel_rtp, pad, NULL); if (upad == NULL) { GST_ERROR_OBJECT (self, "No compatible pad found to link pad."); gst_caps_unref (caps); return; } GST_INFO_OBJECT (self, "Linking with pad %" GST_PTR_FORMAT ".", upad); gst_pad_link (pad, upad); gst_object_unref (upad); } static void gst_rtp_sink_rtpbin_pad_removed_cb (GstElement * element, GstPad * pad, gpointer data) { GstRtpSink *self = GST_RTP_SINK (data); GST_INFO_OBJECT (self, "Element %" GST_PTR_FORMAT " removed pad %" GST_PTR_FORMAT ".", element, pad); } static gboolean gst_rtp_sink_start (GstRtpSink * self) { GSocket *socket = NULL; GInetAddress *iaddr = NULL; gchar *remote_addr = NULL; GError *error = NULL; /* Should not be NULL */ g_return_val_if_fail (self->uri != NULL, FALSE); iaddr = g_inet_address_new_from_string (gst_uri_get_host (self->uri)); if (!iaddr) { GList *results; GResolver *resolver = NULL; resolver = g_resolver_get_default (); results = g_resolver_lookup_by_name (resolver, gst_uri_get_host (self->uri), NULL, &error); if (!results) { g_object_unref (resolver); goto dns_resolve_failed; } iaddr = G_INET_ADDRESS (g_object_ref (results->data)); g_resolver_free_addresses (results); g_object_unref (resolver); } remote_addr = g_inet_address_to_string (iaddr); if (g_inet_address_get_is_multicast (iaddr)) { g_object_set (self->rtcp_src, "address", remote_addr, "port", gst_uri_get_port (self->uri) + 1, NULL); /* set multicast-iface on the udpsrc and udpsink elements */ g_object_set (self->rtcp_src, "multicast-iface", self->multi_iface, NULL); g_object_set (self->rtcp_sink, "multicast-iface", self->multi_iface, NULL); g_object_set (self->rtp_sink, "multicast-iface", self->multi_iface, NULL); } else { const gchar *any_addr; if (g_inet_address_get_family (iaddr) == G_SOCKET_FAMILY_IPV6) any_addr = "::"; else any_addr = "0.0.0.0"; g_object_set (self->rtcp_src, "address", any_addr, "port", 0, NULL); } g_free (remote_addr); g_object_unref (iaddr); gst_element_set_locked_state (self->rtcp_src, FALSE); gst_element_sync_state_with_parent (self->rtcp_src); /* share the socket created by the sink */ g_object_get (self->rtcp_src, "used-socket", &socket, NULL); g_object_set (self->rtcp_sink, "socket", socket, "auto-multicast", FALSE, "close-socket", FALSE, NULL); g_object_unref (socket); gst_element_set_locked_state (self->rtcp_sink, FALSE); gst_element_sync_state_with_parent (self->rtcp_sink); return TRUE; dns_resolve_failed: GST_ELEMENT_ERROR (self, RESOURCE, NOT_FOUND, ("Could not resolve hostname '%s'", gst_uri_get_host (self->uri)), ("DNS resolver reported: %s", error->message)); g_error_free (error); return FALSE; } static GstStateChangeReturn gst_rtp_sink_change_state (GstElement * element, GstStateChange transition) { GstRtpSink *self = GST_RTP_SINK (element); GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; GST_DEBUG_OBJECT (self, "changing state: %s => %s", gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)), gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition))); switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: break; case GST_STATE_CHANGE_READY_TO_PAUSED: break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); if (ret == GST_STATE_CHANGE_FAILURE) return ret; switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: if (gst_rtp_sink_start (self) == FALSE) return GST_STATE_CHANGE_FAILURE; break; case GST_STATE_CHANGE_READY_TO_PAUSED: break; case GST_STATE_CHANGE_PAUSED_TO_READY: break; default: break; } return ret; } static void gst_rtp_sink_init (GstRtpSink * self) { const gchar *missing_plugin = NULL; GstCaps *caps; self->rtpbin = NULL; self->funnel_rtp = NULL; self->funnel_rtcp = NULL; self->rtp_sink = NULL; self->rtcp_src = NULL; self->rtcp_sink = NULL; self->uri = gst_uri_from_string (DEFAULT_PROP_URI); self->ttl = DEFAULT_PROP_TTL; self->ttl_mc = DEFAULT_PROP_TTL_MC; self->multi_iface = g_strdup (DEFAULT_PROP_MULTICAST_IFACE); g_mutex_init (&self->lock); /* Construct the RTP sender pipeline. * * *-> [send_rtp_sink_%u] -------- [send_rtp_src_%u] -> udpsink * | rtpbin | * udpsrc -> [recv_rtcp_sink_%u] -------- [send_rtcp_src_%u] -> * udpsink */ self->rtpbin = gst_element_factory_make ("rtpbin", "rtp_send_rtpbin0"); if (self->rtpbin == NULL) { missing_plugin = "rtpmanager"; goto missing_plugin; } gst_bin_add (GST_BIN (self), self->rtpbin); /* Add rtpbin callbacks to monitor the operation of rtpbin */ g_signal_connect_object (self->rtpbin, "element-added", G_CALLBACK (gst_rtp_sink_rtpbin_element_added_cb), self, 0); g_signal_connect_object (self->rtpbin, "pad-added", G_CALLBACK (gst_rtp_sink_rtpbin_pad_added_cb), self, 0); g_signal_connect_object (self->rtpbin, "pad-removed", G_CALLBACK (gst_rtp_sink_rtpbin_pad_removed_cb), self, 0); GST_OBJECT_FLAG_SET (GST_OBJECT (self), GST_ELEMENT_FLAG_SINK); gst_bin_set_suppressed_flags (GST_BIN (self), GST_ELEMENT_FLAG_SOURCE | GST_ELEMENT_FLAG_SINK); self->funnel_rtp = gst_element_factory_make ("funnel", "rtp_rtp_funnel0"); if (self->funnel_rtp == NULL) { missing_plugin = "funnel"; goto missing_plugin; } self->funnel_rtcp = gst_element_factory_make ("funnel", "rtp_rtcp_funnel0"); if (self->funnel_rtcp == NULL) { missing_plugin = "funnel"; goto missing_plugin; } self->rtp_sink = gst_element_factory_make ("udpsink", "rtp_rtp_udpsink0"); if (self->rtp_sink == NULL) { missing_plugin = "udp"; goto missing_plugin; } self->rtcp_src = gst_element_factory_make ("udpsrc", "rtp_rtcp_udpsrc0"); if (self->rtcp_src == NULL) { missing_plugin = "udp"; goto missing_plugin; } self->rtcp_sink = gst_element_factory_make ("udpsink", "rtp_rtcp_udpsink0"); if (self->rtcp_sink == NULL) { missing_plugin = "udp"; goto missing_plugin; } gst_bin_add (GST_BIN (self), self->funnel_rtp); gst_bin_add (GST_BIN (self), self->funnel_rtcp); gst_bin_add (GST_BIN (self), self->rtp_sink); gst_bin_add (GST_BIN (self), self->rtcp_src); gst_bin_add (GST_BIN (self), self->rtcp_sink); gst_element_set_locked_state (self->rtcp_src, TRUE); gst_element_set_locked_state (self->rtcp_sink, TRUE); /* no need to set address if unicast */ caps = gst_caps_new_empty_simple ("application/x-rtcp"); g_object_set (self->rtcp_src, "caps", caps, NULL); gst_caps_unref (caps); gst_element_link (self->funnel_rtp, self->rtp_sink); gst_element_link (self->funnel_rtcp, self->rtcp_sink); if (missing_plugin == NULL) return; missing_plugin: { GST_ERROR_OBJECT (self, "'%s' plugin is missing.", missing_plugin); /* Just make our element valid, so we fail cleanly */ gst_element_add_pad (GST_ELEMENT (self), gst_pad_new_from_static_template (&sink_template, "sink_%u")); } } static GstURIType gst_rtp_sink_uri_get_type (GType type) { return GST_URI_SINK; } static const gchar *const * gst_rtp_sink_uri_get_protocols (GType type) { static const gchar *protocols[] = { (char *) "rtp", NULL }; return protocols; } static gchar * gst_rtp_sink_uri_get_uri (GstURIHandler * handler) { GstRtpSink *self = (GstRtpSink *) handler; return gst_uri_to_string (self->uri); } static gboolean gst_rtp_sink_uri_set_uri (GstURIHandler * handler, const gchar * uri, GError ** error) { GstRtpSink *self = (GstRtpSink *) handler; g_object_set (G_OBJECT (self), "uri", uri, NULL); return TRUE; } static void gst_rtp_sink_uri_handler_init (gpointer g_iface, gpointer iface_data) { GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface; iface->get_type = gst_rtp_sink_uri_get_type; iface->get_protocols = gst_rtp_sink_uri_get_protocols; iface->get_uri = gst_rtp_sink_uri_get_uri; iface->set_uri = gst_rtp_sink_uri_set_uri; } /* ex: set tabstop=2 shiftwidth=2 expandtab: */