Initial commit of GstRtpFunnel

For funneling together rtp-streams into a single session.
Use-cases include multiplexing and bundle.

gst/rtpmanager/Makefile.am

@@ -14,7 +14,8 @@ libgstrtpmanager_la_SOURCES = gstrtpmanager.c \
 			      rtpsession.c      \
 			      rtpsource.c      \
 			      rtpstats.c      \
-			      gstrtpsession.c
+			      gstrtpsession.c \
+			      gstrtpfunnel.c
 
 noinst_HEADERS = gstrtpbin.h \
 		 gstrtpdtmfmux.h \
@@ -29,7 +30,9 @@ noinst_HEADERS = gstrtpbin.h \
 		 rtpsession.h  \
 		 rtpsource.h  \
 		 rtpstats.h  \
-		 gstrtpsession.h
+		 gstrtpsession.h \
+		 gstrtpfunnel.h
+
 
 libgstrtpmanager_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_CFLAGS) \
 	$(GST_NET_CFLAGS) $(WARNING_CFLAGS) $(ERROR_CFLAGS)

gst/rtpmanager/gstrtpfunnel.c

@@ -0,0 +1,468 @@
+/* RTP funnel element for GStreamer
+ *
+ * gstrtpfunnel.c:
+ *
+ * Copyright (C) <2017> Pexip.
+ *   Contact: Havard Graff <havard@pexip.com>
+ *
+ * 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.
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstrtpfunnel.h"
+
+GST_DEBUG_CATEGORY_STATIC (gst_rtp_funnel_debug);
+#define GST_CAT_DEFAULT gst_rtp_funnel_debug
+
+struct _GstRtpFunnelPad
+{
+  GstPad pad;
+  guint32 ssrc;
+};
+
+enum
+{
+  PROP_0,
+  PROP_COMMON_TS_OFFSET,
+};
+
+#define DEFAULT_COMMON_TS_OFFSET -1
+
+G_DEFINE_TYPE (GstRtpFunnelPad, gst_rtp_funnel_pad, GST_TYPE_PAD);
+
+static void
+gst_rtp_funnel_pad_class_init (GstRtpFunnelPadClass * klass)
+{
+  (void) klass;
+}
+
+static void
+gst_rtp_funnel_pad_init (GstRtpFunnelPad * pad)
+{
+  (void) pad;
+}
+
+struct _GstRtpFunnel
+{
+  GstElement element;
+
+  GstPad *srcpad;
+  GstCaps *srccaps;
+  gboolean send_sticky_events;
+  GHashTable *ssrc_to_pad;
+
+  /* properties */
+  gint common_ts_offset;
+};
+
+#define RTP_CAPS "application/x-rtp"
+
+static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink_%u",
+    GST_PAD_SINK,
+    GST_PAD_REQUEST,
+    GST_STATIC_CAPS (RTP_CAPS));
+
+static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS (RTP_CAPS));
+
+#define gst_rtp_funnel_parent_class parent_class
+G_DEFINE_TYPE (GstRtpFunnel, gst_rtp_funnel, GST_TYPE_ELEMENT);
+
+
+static gboolean
+gst_rtp_funnel_send_sticky (GstRtpFunnel * funnel, GstPad * pad)
+{
+  GstEvent *stream_start;
+  GstEvent *caps;
+  GstEvent *segment;
+
+  if (!funnel->send_sticky_events)
+    goto done;
+
+  stream_start = gst_pad_get_sticky_event (pad, GST_EVENT_STREAM_START, 0);
+  if (stream_start && !gst_pad_push_event (funnel->srcpad, stream_start)) {
+    GST_ERROR_OBJECT (funnel, "Could not push stream start");
+    goto done;
+  }
+
+  caps = gst_event_new_caps (funnel->srccaps);
+  if (caps && !gst_pad_push_event (funnel->srcpad, caps)) {
+    GST_ERROR_OBJECT (funnel, "Could not push caps");
+    goto done;
+  }
+
+  segment = gst_pad_get_sticky_event (pad, GST_EVENT_SEGMENT, 0);
+  if (segment && !gst_pad_push_event (funnel->srcpad, segment)) {
+    GST_ERROR_OBJECT (funnel, "Could not push segment");
+    goto done;
+  }
+
+  funnel->send_sticky_events = FALSE;
+
+done:
+  return !funnel->send_sticky_events;
+}
+
+static GstFlowReturn
+gst_rtp_funnel_sink_chain_object (GstPad * pad, GstRtpFunnel * funnel,
+    gboolean is_list, GstMiniObject * obj)
+{
+  GstFlowReturn res;
+
+  GST_DEBUG_OBJECT (pad, "received %" GST_PTR_FORMAT, obj);
+
+  GST_PAD_STREAM_LOCK (funnel->srcpad);
+
+  if (!gst_rtp_funnel_send_sticky (funnel, pad)) {
+    GST_PAD_STREAM_UNLOCK (funnel->srcpad);
+    gst_mini_object_unref (obj);
+    return GST_FLOW_OK;
+  }
+
+  if (is_list)
+    res = gst_pad_push_list (funnel->srcpad, GST_BUFFER_LIST_CAST (obj));
+  else
+    res = gst_pad_push (funnel->srcpad, GST_BUFFER_CAST (obj));
+
+  GST_PAD_STREAM_UNLOCK (funnel->srcpad);
+
+  return res;
+}
+
+static GstFlowReturn
+gst_rtp_funnel_sink_chain_list (GstPad * pad, GstObject * parent,
+    GstBufferList * list)
+{
+  GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
+
+  return gst_rtp_funnel_sink_chain_object (pad, funnel, TRUE,
+      GST_MINI_OBJECT_CAST (list));
+}
+
+static GstFlowReturn
+gst_rtp_funnel_sink_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
+{
+  GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
+
+  return gst_rtp_funnel_sink_chain_object (pad, funnel, FALSE,
+      GST_MINI_OBJECT_CAST (buffer));
+}
+
+static gboolean
+gst_rtp_funnel_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
+{
+  GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
+  gboolean forward = TRUE;
+  gboolean ret = TRUE;
+
+  GST_DEBUG_OBJECT (pad, "received event %" GST_PTR_FORMAT, event);
+
+  switch (GST_EVENT_TYPE (event)) {
+    case GST_EVENT_STREAM_START:
+    case GST_EVENT_SEGMENT:
+      forward = FALSE;
+      break;
+    case GST_EVENT_CAPS:
+    {
+      GstCaps *caps;
+      GstStructure *s;
+      guint ssrc;
+      gst_event_parse_caps (event, &caps);
+
+      if (!gst_caps_can_intersect (funnel->srccaps, caps)) {
+        GST_ERROR_OBJECT (funnel, "Can't intersect with caps %" GST_PTR_FORMAT,
+            caps);
+        g_assert_not_reached ();
+      }
+
+      s = gst_caps_get_structure (caps, 0);
+      if (gst_structure_get_uint (s, "ssrc", &ssrc)) {
+        GstRtpFunnelPad *fpad = GST_RTP_FUNNEL_PAD_CAST (pad);
+        fpad->ssrc = ssrc;
+        GST_DEBUG_OBJECT (pad, "Got ssrc: %u", ssrc);
+        GST_OBJECT_LOCK (funnel);
+        g_hash_table_insert (funnel->ssrc_to_pad, GUINT_TO_POINTER (ssrc), pad);
+        GST_OBJECT_UNLOCK (funnel);
+      }
+
+      forward = FALSE;
+      break;
+    }
+    default:
+      break;
+  }
+
+  if (forward) {
+    ret = gst_pad_event_default (pad, parent, event);
+  } else {
+    gst_event_unref (event);
+  }
+
+  return ret;
+}
+
+static gboolean
+gst_rtp_funnel_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
+{
+  GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
+  gboolean res = FALSE;
+  (void) funnel;
+
+  switch (GST_QUERY_TYPE (query)) {
+    case GST_QUERY_CAPS:
+    {
+      GstCaps *filter_caps;
+      GstCaps *new_caps;
+
+      gst_query_parse_caps (query, &filter_caps);
+
+      if (filter_caps) {
+        new_caps = gst_caps_intersect_full (funnel->srccaps, filter_caps,
+            GST_CAPS_INTERSECT_FIRST);
+      } else {
+        new_caps = gst_caps_copy (funnel->srccaps);
+      }
+
+      if (funnel->common_ts_offset >= 0)
+        gst_caps_set_simple (new_caps, "timestamp-offset", G_TYPE_UINT,
+            (guint) funnel->common_ts_offset, NULL);
+
+      gst_query_set_caps_result (query, new_caps);
+      GST_DEBUG_OBJECT (pad, "Answering caps-query with caps: %"
+          GST_PTR_FORMAT, new_caps);
+      gst_caps_unref (new_caps);
+      res = TRUE;
+      break;
+    }
+    default:
+      res = gst_pad_query_default (pad, parent, query);
+      break;
+  }
+
+  return res;
+}
+
+static gboolean
+gst_rtp_funnel_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
+{
+  GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (parent);
+  gboolean handled = FALSE;
+  gboolean ret = TRUE;
+
+  GST_DEBUG_OBJECT (pad, "received event %" GST_PTR_FORMAT, event);
+
+  if (GST_EVENT_TYPE (event) == GST_EVENT_CUSTOM_UPSTREAM) {
+    const GstStructure *s = gst_event_get_structure (event);
+    GstPad *fpad;
+    guint ssrc;
+    if (s && gst_structure_get_uint (s, "ssrc", &ssrc)) {
+      handled = TRUE;
+
+      GST_OBJECT_LOCK (funnel);
+      fpad = g_hash_table_lookup (funnel->ssrc_to_pad, GUINT_TO_POINTER (ssrc));
+      if (fpad)
+        gst_object_ref (fpad);
+      GST_OBJECT_UNLOCK (funnel);
+
+      if (fpad) {
+        GST_INFO_OBJECT (pad, "Sending %" GST_PTR_FORMAT " to %" GST_PTR_FORMAT,
+            event, fpad);
+        ret = gst_pad_push_event (fpad, event);
+        gst_object_unref (fpad);
+      } else {
+        gst_event_unref (event);
+      }
+    }
+  }
+
+  if (!handled) {
+    gst_pad_event_default (pad, parent, event);
+  }
+
+  return ret;
+}
+
+static GstPad *
+gst_rtp_funnel_request_new_pad (GstElement * element, GstPadTemplate * templ,
+    const gchar * name, const GstCaps * caps)
+{
+  GstPad *sinkpad;
+  (void) caps;
+
+  GST_DEBUG_OBJECT (element, "requesting pad");
+
+  sinkpad = GST_PAD_CAST (g_object_new (GST_TYPE_RTP_FUNNEL_PAD,
+          "name", name, "direction", templ->direction, "template", templ,
+          NULL));
+
+  gst_pad_set_chain_function (sinkpad,
+      GST_DEBUG_FUNCPTR (gst_rtp_funnel_sink_chain));
+  gst_pad_set_chain_list_function (sinkpad,
+      GST_DEBUG_FUNCPTR (gst_rtp_funnel_sink_chain_list));
+  gst_pad_set_event_function (sinkpad,
+      GST_DEBUG_FUNCPTR (gst_rtp_funnel_sink_event));
+  gst_pad_set_query_function (sinkpad,
+      GST_DEBUG_FUNCPTR (gst_rtp_funnel_sink_query));
+
+  GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
+  GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
+
+  gst_pad_set_active (sinkpad, TRUE);
+
+  gst_element_add_pad (element, sinkpad);
+
+  GST_DEBUG_OBJECT (element, "requested pad %s:%s",
+      GST_DEBUG_PAD_NAME (sinkpad));
+
+  return sinkpad;
+}
+
+static void
+gst_rtp_funnel_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (object);
+
+  switch (prop_id) {
+    case PROP_COMMON_TS_OFFSET:
+      funnel->common_ts_offset = g_value_get_int (value);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_rtp_funnel_get_property (GObject * object, guint prop_id, GValue * value,
+    GParamSpec * pspec)
+{
+  GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (object);
+
+  switch (prop_id) {
+    case PROP_COMMON_TS_OFFSET:
+      g_value_set_int (value, funnel->common_ts_offset);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static GstStateChangeReturn
+gst_rtp_funnel_change_state (GstElement * element, GstStateChange transition)
+{
+  GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (element);
+  GstStateChangeReturn ret;
+
+  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_PAUSED_TO_READY:
+      funnel->send_sticky_events = TRUE;
+      break;
+    default:
+      break;
+  }
+
+  return ret;
+}
+
+static gboolean
+_remove_pad_func (gpointer key, gpointer value, gpointer user_data)
+{
+  (void) key;
+  if (GST_PAD_CAST (value) == GST_PAD_CAST (user_data))
+    return TRUE;
+  return FALSE;
+}
+
+static void
+gst_rtp_funnel_release_pad (GstElement * element, GstPad * pad)
+{
+  GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (element);
+
+  GST_DEBUG_OBJECT (funnel, "releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
+
+  g_hash_table_foreach_remove (funnel->ssrc_to_pad, _remove_pad_func, pad);
+
+  gst_pad_set_active (pad, FALSE);
+  gst_element_remove_pad (GST_ELEMENT_CAST (funnel), pad);
+}
+
+static void
+gst_rtp_funnel_dispose (GObject * object)
+{
+  GstRtpFunnel *funnel = GST_RTP_FUNNEL_CAST (object);
+
+  g_assert (GST_ELEMENT_CAST (object)->numsinkpads == 0);
+  gst_caps_unref (funnel->srccaps);
+  g_hash_table_destroy (funnel->ssrc_to_pad);
+
+  G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static void
+gst_rtp_funnel_class_init (GstRtpFunnelClass * klass)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+  GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
+
+  gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_rtp_funnel_dispose);
+  gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_rtp_funnel_get_property);
+  gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_rtp_funnel_set_property);
+  gstelement_class->request_new_pad =
+      GST_DEBUG_FUNCPTR (gst_rtp_funnel_request_new_pad);
+  gstelement_class->release_pad =
+      GST_DEBUG_FUNCPTR (gst_rtp_funnel_release_pad);
+  gstelement_class->change_state =
+      GST_DEBUG_FUNCPTR (gst_rtp_funnel_change_state);
+
+  gst_element_class_set_static_metadata (gstelement_class, "RTP funnel",
+      "RTP Funneling",
+      "Funnel RTP buffers together for multiplexing",
+      "Havard Graff <havard@gstip.com>");
+
+  gst_element_class_add_static_pad_template (gstelement_class, &sink_template);
+  gst_element_class_add_static_pad_template (gstelement_class, &src_template);
+
+  g_object_class_install_property (gobject_class, PROP_COMMON_TS_OFFSET,
+      g_param_spec_int ("common-ts-offset", "Common Timestamp Offset",
+          "Use the same RTP timestamp offset for all sinkpads (-1 = disable)",
+          -1, G_MAXINT32, DEFAULT_COMMON_TS_OFFSET,
+          G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+  GST_DEBUG_CATEGORY_INIT (gst_rtp_funnel_debug,
+      "gstrtpfunnel", 0, "funnel element");
+}
+
+static void
+gst_rtp_funnel_init (GstRtpFunnel * funnel)
+{
+  funnel->srcpad = gst_pad_new_from_static_template (&src_template, "src");
+  gst_pad_use_fixed_caps (funnel->srcpad);
+  gst_pad_set_event_function (funnel->srcpad,
+      GST_DEBUG_FUNCPTR (gst_rtp_funnel_src_event));
+  gst_element_add_pad (GST_ELEMENT (funnel), funnel->srcpad);
+
+  funnel->send_sticky_events = TRUE;
+  funnel->srccaps = gst_caps_new_empty_simple (RTP_CAPS);
+  funnel->ssrc_to_pad = g_hash_table_new (NULL, NULL);
+}

gst/rtpmanager/gstrtpfunnel.h

@@ -0,0 +1,40 @@
+/* RTP funnel element for GStreamer
+ *
+ * gstrtpfunnel.h:
+ *
+ * Copyright (C) <2017> Pexip.
+ *   Contact: Havard Graff <havard@pexip.com>
+ *
+ * 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.
+ */
+#ifndef __GST_RTP_FUNNEL_H__
+#define __GST_RTP_FUNNEL_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+G_DECLARE_FINAL_TYPE (GstRtpFunnel, gst_rtp_funnel, GST, RTP_FUNNEL, GstElement)
+#define GST_TYPE_RTP_FUNNEL (gst_rtp_funnel_get_type())
+#define GST_RTP_FUNNEL_CAST(obj) ((GstRtpFunnel *)(obj))
+
+G_DECLARE_FINAL_TYPE (GstRtpFunnelPad, gst_rtp_funnel_pad, GST, RTP_FUNNEL_PAD, GstPad)
+#define GST_TYPE_RTP_FUNNEL_PAD (gst_rtp_funnel_pad_get_type())
+#define GST_RTP_FUNNEL_PAD_CAST(obj) ((GstRtpFunnelPad *)(obj))
+
+G_END_DECLS
+
+#endif /* __GST_RTP_FUNNEL_H__ */

gst/rtpmanager/gstrtpmanager.c

@@ -31,6 +31,7 @@
 #include "gstrtpssrcdemux.h"
 #include "gstrtpdtmfmux.h"
 #include "gstrtpmux.h"
+#include "gstrtpfunnel.h"
 
 static gboolean
 plugin_init (GstPlugin * plugin)
@@ -69,6 +70,10 @@ plugin_init (GstPlugin * plugin)
   if (!gst_rtp_dtmf_mux_plugin_init (plugin))
     return FALSE;
 
+  if (!gst_element_register (plugin, "rtpfunnel", GST_RANK_NONE,
+          GST_TYPE_RTP_FUNNEL))
+    return FALSE;
+
   return TRUE;
 }
 

gst/rtpmanager/meson.build

@@ -14,6 +14,7 @@ rtpmanager_sources = [
   'rtpsource.c',
   'rtpstats.c',
   'gstrtpsession.c',
+  'gstrtpfunnel.c',
 ]
 
 gstrtpmanager = library('gstrtpmanager',

tests/check/Makefile.am

@@ -254,7 +254,8 @@ check_rtpmanager = \
 	elements/rtpsession \
 	elements/rtpstorage \
 	elements/rtpred \
-	elements/rtpulpfec
+	elements/rtpulpfec \
+	elements/rtpfunnel
 else
 check_rtpmanager =
 endif
@@ -605,6 +606,9 @@ elements_rtprtx_LDADD = $(GST_PLUGINS_BASE_LIBS) -lgstrtp-$(GST_API_VERSION) $(L
 elements_rtpsession_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(CFLAGS) $(AM_CFLAGS)
 elements_rtpsession_LDADD = $(GST_PLUGINS_BASE_LIBS) $(GST_NET_LIBS) -lgstrtp-$(GST_API_VERSION) -lgstvideo-$(GST_API_VERSION) $(GIO_LIBS) $(LDADD)
 
+elements_rtpfunnel_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_BASE_CFLAGS) $(AM_CFLAGS)
+elements_rtpfunnel_LDADD = $(GST_PLUGINS_BASE_LIBS) -lgstrtp-$(GST_API_VERSION) $(GST_BASE_LIBS) $(LDADD)
+
 elements_rtpcollision_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(CFLAGS) $(AM_CFLAGS)
 elements_rtpcollision_LDADD = $(GST_PLUGINS_BASE_LIBS) $(GST_NET_LIBS) -lgstrtp-$(GST_API_VERSION) $(GIO_LIBS) $(LDADD)
 

tests/check/elements/rtpfunnel.c

@@ -0,0 +1,193 @@
+/* GStreamer
+ *
+ * unit test for rtpfunnel
+ *
+ * Copyright (C) <2017> Pexip.
+ *   Contact: Havard Graff <havard@pexip.com>
+ *
+ * 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.
+ */
+#include <gst/check/gstcheck.h>
+#include <gst/check/gstharness.h>
+
+GST_START_TEST (rtpfunnel_ssrc_demuxing)
+{
+  GstHarness *h = gst_harness_new_with_padnames ("rtpfunnel", NULL, "src");
+  GstHarness *h0 = gst_harness_new_with_element (h->element, "sink_0", NULL);
+  GstHarness *h1 = gst_harness_new_with_element (h->element, "sink_1", NULL);
+
+  gst_harness_set_src_caps_str (h0, "application/x-rtp, ssrc=(uint)123");
+  gst_harness_set_src_caps_str (h1, "application/x-rtp, ssrc=(uint)321");
+
+  /* unref latency events */
+  gst_event_unref (gst_harness_pull_upstream_event (h0));
+  gst_event_unref (gst_harness_pull_upstream_event (h1));
+  fail_unless_equals_int (1, gst_harness_upstream_events_received (h0));
+  fail_unless_equals_int (1, gst_harness_upstream_events_received (h1));
+
+  /* send to pad 0 */
+  gst_harness_push_upstream_event (h,
+      gst_event_new_custom (GST_EVENT_CUSTOM_UPSTREAM,
+          gst_structure_new ("GstForceKeyUnit",
+              "ssrc", G_TYPE_UINT, 123, NULL)));
+  fail_unless_equals_int (2, gst_harness_upstream_events_received (h0));
+  fail_unless_equals_int (1, gst_harness_upstream_events_received (h1));
+
+  /* send to pad 1 */
+  gst_harness_push_upstream_event (h,
+      gst_event_new_custom (GST_EVENT_CUSTOM_UPSTREAM,
+          gst_structure_new ("GstForceKeyUnit",
+              "ssrc", G_TYPE_UINT, 321, NULL)));
+  fail_unless_equals_int (2, gst_harness_upstream_events_received (h0));
+  fail_unless_equals_int (2, gst_harness_upstream_events_received (h1));
+
+  /* unknown ssrc, we drop it */
+  gst_harness_push_upstream_event (h,
+      gst_event_new_custom (GST_EVENT_CUSTOM_UPSTREAM,
+          gst_structure_new ("GstForceKeyUnit",
+              "ssrc", G_TYPE_UINT, 666, NULL)));
+  fail_unless_equals_int (2, gst_harness_upstream_events_received (h0));
+  fail_unless_equals_int (2, gst_harness_upstream_events_received (h1));
+
+  /* no ssrc, we send to all */
+  gst_harness_push_upstream_event (h,
+      gst_event_new_custom (GST_EVENT_CUSTOM_UPSTREAM,
+          gst_structure_new_empty ("GstForceKeyUnit")));
+  fail_unless_equals_int (3, gst_harness_upstream_events_received (h0));
+  fail_unless_equals_int (3, gst_harness_upstream_events_received (h1));
+
+  /* remove pad 0, and send an event referencing the now dead ssrc */
+  gst_harness_teardown (h0);
+  gst_harness_push_upstream_event (h,
+      gst_event_new_custom (GST_EVENT_CUSTOM_UPSTREAM,
+          gst_structure_new ("GstForceKeyUnit",
+              "ssrc", G_TYPE_UINT, 123, NULL)));
+  fail_unless_equals_int (3, gst_harness_upstream_events_received (h1));
+
+  gst_harness_teardown (h);
+  gst_harness_teardown (h1);
+}
+
+GST_END_TEST
+GST_START_TEST (rtpfunnel_ssrc_downstream_not_leaking_through)
+{
+  GstHarness *h = gst_harness_new_with_padnames ("rtpfunnel",
+      "sink_0", "src");
+  GstCaps *caps;
+  const GstStructure *s;
+
+  gst_harness_set_sink_caps_str (h, "application/x-rtp, ssrc=(uint)123");
+
+  caps = gst_pad_peer_query_caps (h->srcpad, NULL);
+  s = gst_caps_get_structure (caps, 0);
+
+  fail_unless (!gst_structure_has_field (s, "ssrc"));
+
+  gst_caps_unref (caps);
+  gst_harness_teardown (h);
+}
+
+GST_END_TEST
+GST_START_TEST (rtpfunnel_common_ts_offset)
+{
+  GstHarness *h = gst_harness_new_with_padnames ("rtpfunnel",
+      "sink_0", "src");
+  GstCaps *caps;
+  const GstStructure *s;
+  const guint expected_ts_offset = 12345;
+  guint ts_offset;
+
+  g_object_set (h->element, "common-ts-offset", expected_ts_offset, NULL);
+
+  caps = gst_pad_peer_query_caps (h->srcpad, NULL);
+  s = gst_caps_get_structure (caps, 0);
+
+  fail_unless (gst_structure_get_uint (s, "timestamp-offset", &ts_offset));
+  fail_unless_equals_int (expected_ts_offset, ts_offset);
+
+  gst_caps_unref (caps);
+  gst_harness_teardown (h);
+}
+
+GST_END_TEST
+GST_START_TEST (rtpfunnel_stress)
+{
+  GstHarness *h = gst_harness_new_with_padnames ("rtpfunnel",
+      "sink_0", "src");
+  GstHarness *h1 = gst_harness_new_with_element (h->element, "sink_1", NULL);
+
+  GstPadTemplate *templ =
+      gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS (h->element),
+      "sink_%u");
+  GstCaps *caps = gst_caps_from_string ("application/x-rtp, ssrc=(uint)123");
+  GstBuffer *buf = gst_buffer_new_allocate (NULL, 0, NULL);
+  GstSegment segment;
+  GstHarnessThread *statechange, *push, *req, *push1;
+
+  gst_check_add_log_filter ("GStreamer", G_LOG_LEVEL_WARNING,
+      g_regex_new ("Got data flow before (stream-start|segment) event",
+          (GRegexCompileFlags) 0, (GRegexMatchFlags) 0, NULL),
+      NULL, NULL, NULL);
+  gst_check_add_log_filter ("GStreamer", G_LOG_LEVEL_WARNING,
+      g_regex_new ("Sticky event misordering",
+          (GRegexCompileFlags) 0, (GRegexMatchFlags) 0, NULL),
+      NULL, NULL, NULL);
+
+
+  gst_segment_init (&segment, GST_FORMAT_TIME);
+
+  statechange = gst_harness_stress_statechange_start (h);
+  push = gst_harness_stress_push_buffer_start (h, caps, &segment, buf);
+  req = gst_harness_stress_requestpad_start (h, templ, NULL, NULL, TRUE);
+  push1 = gst_harness_stress_push_buffer_start (h1, caps, &segment, buf);
+
+  gst_caps_unref (caps);
+  gst_buffer_unref (buf);
+
+  /* test-length */
+  g_usleep (G_USEC_PER_SEC * 1);
+
+  gst_harness_stress_thread_stop (push1);
+  gst_harness_stress_thread_stop (req);
+  gst_harness_stress_thread_stop (push);
+  gst_harness_stress_thread_stop (statechange);
+
+  gst_harness_teardown (h1);
+  gst_harness_teardown (h);
+
+  gst_check_clear_log_filter ();
+}
+
+GST_END_TEST;
+
+static Suite *
+rtpfunnel_suite (void)
+{
+  Suite *s = suite_create ("rtpfunnel");
+  TCase *tc_chain = tcase_create ("general");
+
+  suite_add_tcase (s, tc_chain);
+
+  tcase_add_test (tc_chain, rtpfunnel_ssrc_demuxing);
+  tcase_add_test (tc_chain, rtpfunnel_ssrc_downstream_not_leaking_through);
+  tcase_add_test (tc_chain, rtpfunnel_common_ts_offset);
+
+  tcase_add_test (tc_chain, rtpfunnel_stress);
+
+  return s;
+}
+
+GST_CHECK_MAIN (rtpfunnel)

tests/check/meson.build

@@ -75,6 +75,7 @@ good_tests = [
   [ 'elements/rtpbin_buffer_list' ],
   [ 'elements/rtpbundle' ],
   [ 'elements/rtpcollision' ],
+  [ 'elements/rtpfunnel' ],
   [ 'elements/rtpjitterbuffer' ],
   [ 'elements/rtpmux' ],
   [ 'elements/rtprtx' ],