Merge branch 'rtsp-sdp-source-filter2' into 'main'

rtsp-server: add SDP source-filter (RFC 4570)

Closes #3290

See merge request gstreamer/gstreamer!6612

subprojects/gst-rtsp-server/examples/meson.build

@@ -22,6 +22,7 @@ examples = [
   'test-record',
   'test-replay-server',
   'test-sdp',
+  'test-source-specific-multicast',
   'test-uri',
   'test-video',
   'test-video-rtx',

subprojects/gst-rtsp-server/examples/test-source-specific-multicast.c

@@ -0,0 +1,104 @@
+/* GStreamer
+ * Copyright (C) 2008 Wim Taymans <wim.taymans at gmail.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/gst.h>
+
+#include <gst/rtsp-server/rtsp-server.h>
+
+
+static gboolean
+timeout (GstRTSPServer * server)
+{
+  GstRTSPSessionPool *pool;
+
+  pool = gst_rtsp_server_get_session_pool (server);
+  gst_rtsp_session_pool_cleanup (pool);
+  g_object_unref (pool);
+
+  return TRUE;
+}
+
+int
+main (int argc, char *argv[])
+{
+  GMainLoop *loop;
+  GstRTSPServer *server;
+  GstRTSPMountPoints *mounts;
+  GstRTSPMediaFactory *factory;
+  GstRTSPAddressPool *pool;
+
+  gst_init (&argc, &argv);
+
+  loop = g_main_loop_new (NULL, FALSE);
+
+  /* create a server instance */
+  server = gst_rtsp_server_new ();
+
+  /* get the mount points for this server, every server has a default object
+   * that be used to map uri mount points to media factories */
+  mounts = gst_rtsp_server_get_mount_points (server);
+
+  /* make a media factory for a test stream. The default media factory can use
+   * gst-launch syntax to create pipelines. 
+   * any launch line works as long as it contains elements named pay%d. Each
+   * element with pay%d names will be a stream */
+  factory = gst_rtsp_media_factory_new ();
+  gst_rtsp_media_factory_set_launch (factory, "( "
+      "videotestsrc ! video/x-raw,width=352,height=288,framerate=15/1 ! "
+      "x264enc ! rtph264pay name=pay0 pt=96 "
+      "audiotestsrc ! audio/x-raw,rate=8000 ! "
+      "alawenc ! rtppcmapay name=pay1 pt=97 " ")");
+
+  gst_rtsp_media_factory_set_shared (factory, TRUE);
+
+  /* make a new address pool within RFC 3569 source-specific multicast range of 232/8 */
+  pool = gst_rtsp_address_pool_new ();
+  gst_rtsp_address_pool_add_range (pool,
+      "232.3.0.0", "232.3.0.10", 5000, 5010, 16);
+  gst_rtsp_media_factory_set_address_pool (factory, pool);
+  /* only allow multicast */
+  gst_rtsp_media_factory_set_protocols (factory,
+      GST_RTSP_LOWER_TRANS_UDP_MCAST);
+  g_object_unref (pool);
+
+  /* attach the test factory to the /test url */
+  gst_rtsp_mount_points_add_factory (mounts, "/test", factory);
+
+  /* don't need the ref to the mapper anymore */
+  g_object_unref (mounts);
+
+  /* attach the server to the default maincontext */
+  if (gst_rtsp_server_attach (server, NULL) == 0)
+    goto failed;
+
+  g_timeout_add_seconds (2, (GSourceFunc) timeout, server);
+
+  /* start serving */
+  g_print ("stream ready at rtsp://127.0.0.1:8554/test\n");
+  g_main_loop_run (loop);
+
+  return 0;
+
+  /* ERRORS */
+failed:
+  {
+    g_print ("failed to attach the server\n");
+    return -1;
+  }
+}

subprojects/gst-rtsp-server/gst/rtsp-server/rtsp-sdp.c

@@ -259,6 +259,31 @@ gst_rtsp_sdp_make_media (GstSDPMessage * sdp, GstSDPInfo * info,
     address = g_strdup (addr->address);
     ttl = addr->ttl;
     gst_rtsp_address_free (addr);
+
+    /* for source-specific multicast (RFC 4570) */
+    gboolean is_ssm = FALSE;
+    if (info->is_ipv6) {
+      /* Untested method of determining if the address is in the ff3x::/32 subnet
+       * Disabled until tested
+       */
+      // gchar **ip6_addr;
+      // ip6_addr = g_strsplit (address, ":", 0);
+      // is_ssm = strncmp ((ip6_addr[0], "ff3", 3) == 0 &&
+      //   ( strcmp (ip6_addr[1], "0000") == 0 || strcmp (ip6_addr[1], "") == 0 );
+      // g_strfreev(ip6_addr);
+      is_ssm = FALSE;
+    } else {
+      is_ssm = strncmp (address, "232.", 4) == 0;
+    }
+    gchar *filter;
+    if (is_ssm) {
+      filter =
+          g_strdup_printf ("incl %s %s %s %s", "IN", addrtype, address,
+          info->server_ip);
+      gst_sdp_media_add_attribute (smedia, "source-filter", filter);
+      g_free (filter);
+    }
+
   } else {
     ttl = 16;
     if (info->is_ipv6)