2 * Copyright (C) <2007> Wim Taymans <wim.taymans@gmail.com>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * SECTION:element-gstrtpbin
22 * @short_description: handle media from one RTP bin
23 * @see_also: gstrtpjitterbuffer, gstrtpsession, gstrtpptdemux, gstrtpssrcdemux
27 * RTP bin combines the functions of gstrtpsession, gstrtpssrcdemux, gstrtpjitterbuffer
28 * and gstrtpptdemux in one element. It allows for multiple RTP sessions that will
29 * be synchronized together using RTCP SR packets.
32 * gstrtpbin is configured with a number of request pads that define the
33 * functionality that is activated, similar to the gstrtpsession element.
36 * To use gstrtpbin as an RTP receiver, request a recv_rtp_sink_%%d pad. The session
37 * number must be specified in the pad name.
38 * Data received on the recv_rtp_sink_%%d pad will be processed in the gstrtpsession
39 * manager and after being validated forwarded on gstrtpssrcdemuxer element. Each
40 * RTP stream is demuxed based on the SSRC and send to a gstrtpjitterbuffer. After
41 * the packets are released from the jitterbuffer, they will be forwarded to a
42 * gstrtpptdemuxer element. The gstrtpptdemuxer element will demux the packets based
43 * on the payload type and will create a unique pad recv_rtp_src_%%d_%%d_%%d on
44 * gstrtpbin with the session number, SSRC and payload type respectively as the pad
48 * To also use gstrtpbin as an RTCP receiver, request a recv_rtcp_sink_%%d pad. The
49 * session number must be specified in the pad name.
52 * If you want the session manager to generate and send RTCP packets, request
53 * the send_rtcp_src_%%d pad with the session number in the pad name. Packet pushed
54 * on this pad contain SR/RR RTCP reports that should be sent to all participants
58 * To use gstrtpbin as a sender, request a send_rtp_sink_%%d pad, which will
59 * automatically create a send_rtp_src_%%d pad. If the session number is not provided,
60 * the pad from the lowest available session will be returned. The session manager will modify the
61 * SSRC in the RTP packets to its own SSRC and wil forward the packets on the
62 * send_rtp_src_%%d pad after updating its internal state.
65 * The session manager needs the clock-rate of the payload types it is handling
66 * and will signal the GstRtpSession::request-pt-map signal when it needs such a
67 * mapping. One can clear the cached values with the GstRtpSession::clear-pt-map
70 * <title>Example pipelines</title>
73 * gst-launch udpsrc port=5000 caps="application/x-rtp, ..." ! .recv_rtp_sink_0 \
74 * gstrtpbin ! rtptheoradepay ! theoradec ! xvimagesink
76 * Receive RTP data from port 5000 and send to the session 0 in gstrtpbin.
80 * gst-launch gstrtpbin name=rtpbin \
81 * v4l2src ! ffmpegcolorspace ! ffenc_h263 ! rtph263ppay ! rtpbin.send_rtp_sink_0 \
82 * rtpbin.send_rtp_src_0 ! udpsink port=5000 \
83 * rtpbin.send_rtcp_src_0 ! udpsink port=5001 sync=false async=false \
84 * udpsrc port=5005 ! rtpbin.recv_rtcp_sink_0 \
85 * audiotestsrc ! amrnbenc ! rtpamrpay ! rtpbin.send_rtp_sink_1 \
86 * rtpbin.send_rtp_src_1 ! udpsink port=5002 \
87 * rtpbin.send_rtcp_src_1 ! udpsink port=5003 sync=false async=false \
88 * udpsrc port=5007 ! rtpbin.recv_rtcp_sink_1
90 * Encode and payload H263 video captured from a v4l2src. Encode and payload AMR
91 * audio generated from audiotestsrc. The video is sent to session 0 in rtpbin
92 * and the audio is sent to session 1. Video packets are sent on UDP port 5000
93 * and audio packets on port 5002. The video RTCP packets for session 0 are sent
94 * on port 5001 and the audio RTCP packets for session 0 are sent on port 5003.
95 * RTCP packets for session 0 are received on port 5005 and RTCP for session 1
96 * is received on port 5007. Since RTCP packets from the sender should be sent
97 * as soon as possible and do not participate in preroll, sync=false and
98 * async=false is configured on udpsink
102 * gst-launch -v gstrtpbin name=rtpbin \
103 * udpsrc caps="application/x-rtp,media=(string)video,clock-rate=(int)90000,encoding-name=(string)H263-1998" \
104 * port=5000 ! rtpbin.recv_rtp_sink_0 \
105 * rtpbin. ! rtph263pdepay ! ffdec_h263 ! xvimagesink \
106 * udpsrc port=5001 ! rtpbin.recv_rtcp_sink_0 \
107 * rtpbin.send_rtcp_src_0 ! udpsink port=5005 sync=false async=false \
108 * udpsrc caps="application/x-rtp,media=(string)audio,clock-rate=(int)8000,encoding-name=(string)AMR,encoding-params=(string)1,octet-align=(string)1" \
109 * port=5002 ! rtpbin.recv_rtp_sink_1 \
110 * rtpbin. ! rtpamrdepay ! amrnbdec ! alsasink \
111 * udpsrc port=5003 ! rtpbin.recv_rtcp_sink_1 \
112 * rtpbin.send_rtcp_src_1 ! udpsink port=5007 sync=false async=false
114 * Receive H263 on port 5000, send it through rtpbin in session 0, depayload,
115 * decode and display the video.
116 * Receive AMR on port 5002, send it through rtpbin in session 1, depayload,
117 * decode and play the audio.
118 * Receive server RTCP packets for session 0 on port 5001 and RTCP packets for
119 * session 1 on port 5003. These packets will be used for session management and
121 * Send RTCP reports for session 0 on port 5005 and RTCP reports for session 1
126 * Last reviewed on 2007-08-30 (0.10.6)
134 #include <gst/rtp/gstrtpbuffer.h>
135 #include <gst/rtp/gstrtcpbuffer.h>
137 #include "gstrtpbin-marshal.h"
138 #include "gstrtpbin.h"
140 GST_DEBUG_CATEGORY_STATIC (gst_rtp_bin_debug);
141 #define GST_CAT_DEFAULT gst_rtp_bin_debug
143 /* elementfactory information */
144 static const GstElementDetails rtpbin_details = GST_ELEMENT_DETAILS ("RTP Bin",
145 "Filter/Network/RTP",
146 "Implement an RTP bin",
147 "Wim Taymans <wim.taymans@gmail.com>");
150 static GstStaticPadTemplate rtpbin_recv_rtp_sink_template =
151 GST_STATIC_PAD_TEMPLATE ("recv_rtp_sink_%d",
154 GST_STATIC_CAPS ("application/x-rtp")
157 static GstStaticPadTemplate rtpbin_recv_rtcp_sink_template =
158 GST_STATIC_PAD_TEMPLATE ("recv_rtcp_sink_%d",
161 GST_STATIC_CAPS ("application/x-rtcp")
164 static GstStaticPadTemplate rtpbin_send_rtp_sink_template =
165 GST_STATIC_PAD_TEMPLATE ("send_rtp_sink_%d",
168 GST_STATIC_CAPS ("application/x-rtp")
172 static GstStaticPadTemplate rtpbin_recv_rtp_src_template =
173 GST_STATIC_PAD_TEMPLATE ("recv_rtp_src_%d_%d_%d",
176 GST_STATIC_CAPS ("application/x-rtp")
179 static GstStaticPadTemplate rtpbin_send_rtcp_src_template =
180 GST_STATIC_PAD_TEMPLATE ("send_rtcp_src_%d",
183 GST_STATIC_CAPS ("application/x-rtcp")
186 static GstStaticPadTemplate rtpbin_send_rtp_src_template =
187 GST_STATIC_PAD_TEMPLATE ("send_rtp_src_%d",
190 GST_STATIC_CAPS ("application/x-rtp")
193 /* padtemplate for the internal pad */
194 static GstStaticPadTemplate rtpbin_sync_sink_template =
195 GST_STATIC_PAD_TEMPLATE ("sink_%d",
198 GST_STATIC_CAPS ("application/x-rtcp")
201 #define GST_RTP_BIN_GET_PRIVATE(obj) \
202 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_RTP_BIN, GstRtpBinPrivate))
204 #define GST_RTP_BIN_LOCK(bin) g_mutex_lock ((bin)->priv->bin_lock)
205 #define GST_RTP_BIN_UNLOCK(bin) g_mutex_unlock ((bin)->priv->bin_lock)
207 struct _GstRtpBinPrivate
211 GstClockTime ntp_ns_base;
214 /* signals and args */
217 SIGNAL_REQUEST_PT_MAP,
221 SIGNAL_ON_SSRC_COLLISION,
222 SIGNAL_ON_SSRC_VALIDATED,
223 SIGNAL_ON_SSRC_ACTIVE,
226 SIGNAL_ON_BYE_TIMEOUT,
231 #define DEFAULT_LATENCY_MS 200
232 #define DEFAULT_SDES_CNAME NULL
233 #define DEFAULT_SDES_NAME NULL
234 #define DEFAULT_SDES_EMAIL NULL
235 #define DEFAULT_SDES_PHONE NULL
236 #define DEFAULT_SDES_LOCATION NULL
237 #define DEFAULT_SDES_TOOL NULL
238 #define DEFAULT_SDES_NOTE NULL
255 typedef struct _GstRtpBinSession GstRtpBinSession;
256 typedef struct _GstRtpBinStream GstRtpBinStream;
257 typedef struct _GstRtpBinClient GstRtpBinClient;
259 static guint gst_rtp_bin_signals[LAST_SIGNAL] = { 0 };
261 static GstCaps *pt_map_requested (GstElement * element, guint pt,
262 GstRtpBinSession * session);
263 static const gchar *sdes_type_to_name (GstRTCPSDESType type);
264 static void gst_rtp_bin_set_sdes_string (GstRtpBin * bin,
265 GstRTCPSDESType type, const gchar * data);
267 static void free_stream (GstRtpBinStream * stream);
269 /* Manages the RTP stream for one SSRC.
271 * We pipe the stream (comming from the SSRC demuxer) into a jitterbuffer.
272 * If we see an SDES RTCP packet that links multiple SSRCs together based on a
273 * common CNAME, we create a GstRtpBinClient structure to group the SSRCs
274 * together (see below).
276 struct _GstRtpBinStream
278 /* the SSRC of this stream */
284 /* the session this SSRC belongs to */
285 GstRtpBinSession *session;
287 /* the jitterbuffer of the SSRC */
290 /* the PT demuxer of the SSRC */
292 gulong demux_newpad_sig;
293 gulong demux_ptreq_sig;
294 gulong demux_pt_change_sig;
296 /* the internal pad we use to get RTCP sync messages */
300 guint64 last_extrtptime;
302 /* mapping to local RTP and NTP time */
311 gint64 prev_ts_offset;
315 #define GST_RTP_SESSION_LOCK(sess) g_mutex_lock ((sess)->lock)
316 #define GST_RTP_SESSION_UNLOCK(sess) g_mutex_unlock ((sess)->lock)
318 /* Manages the receiving end of the packets.
320 * There is one such structure for each RTP session (audio/video/...).
321 * We get the RTP/RTCP packets and stuff them into the session manager. From
322 * there they are pushed into an SSRC demuxer that splits the stream based on
323 * SSRC. Each of the SSRC streams go into their own jitterbuffer (managed with
324 * the GstRtpBinStream above).
326 struct _GstRtpBinSession
332 /* the session element */
334 /* the SSRC demuxer */
336 gulong demux_newpad_sig;
340 /* list of GstRtpBinStream */
343 /* mapping of payload type to caps */
346 /* the pads of the session */
347 GstPad *recv_rtp_sink;
348 GstPad *recv_rtp_src;
349 GstPad *recv_rtcp_sink;
351 GstPad *send_rtp_sink;
352 GstPad *send_rtp_src;
353 GstPad *send_rtcp_src;
356 /* Manages the RTP streams that come from one client and should therefore be
359 struct _GstRtpBinClient
361 /* the common CNAME for the streams */
372 /* find a session with the given id. Must be called with RTP_BIN_LOCK */
373 static GstRtpBinSession *
374 find_session_by_id (GstRtpBin * rtpbin, gint id)
378 for (walk = rtpbin->sessions; walk; walk = g_slist_next (walk)) {
379 GstRtpBinSession *sess = (GstRtpBinSession *) walk->data;
388 on_new_ssrc (GstElement * session, guint32 ssrc, GstRtpBinSession * sess)
390 g_signal_emit (sess->bin, gst_rtp_bin_signals[SIGNAL_ON_NEW_SSRC], 0,
395 on_ssrc_collision (GstElement * session, guint32 ssrc, GstRtpBinSession * sess)
397 g_signal_emit (sess->bin, gst_rtp_bin_signals[SIGNAL_ON_SSRC_COLLISION], 0,
402 on_ssrc_validated (GstElement * session, guint32 ssrc, GstRtpBinSession * sess)
404 g_signal_emit (sess->bin, gst_rtp_bin_signals[SIGNAL_ON_SSRC_VALIDATED], 0,
409 on_ssrc_active (GstElement * session, guint32 ssrc, GstRtpBinSession * sess)
411 g_signal_emit (sess->bin, gst_rtp_bin_signals[SIGNAL_ON_SSRC_ACTIVE], 0,
416 on_ssrc_sdes (GstElement * session, guint32 ssrc, GstRtpBinSession * sess)
418 g_signal_emit (sess->bin, gst_rtp_bin_signals[SIGNAL_ON_SSRC_SDES], 0,
423 on_bye_ssrc (GstElement * session, guint32 ssrc, GstRtpBinSession * sess)
425 g_signal_emit (sess->bin, gst_rtp_bin_signals[SIGNAL_ON_BYE_SSRC], 0,
430 on_bye_timeout (GstElement * session, guint32 ssrc, GstRtpBinSession * sess)
432 g_signal_emit (sess->bin, gst_rtp_bin_signals[SIGNAL_ON_BYE_TIMEOUT], 0,
437 on_timeout (GstElement * session, guint32 ssrc, GstRtpBinSession * sess)
439 g_signal_emit (sess->bin, gst_rtp_bin_signals[SIGNAL_ON_TIMEOUT], 0,
443 /* create a session with the given id. Must be called with RTP_BIN_LOCK */
444 static GstRtpBinSession *
445 create_session (GstRtpBin * rtpbin, gint id)
447 GstRtpBinSession *sess;
448 GstElement *session, *demux;
451 if (!(session = gst_element_factory_make ("gstrtpsession", NULL)))
454 if (!(demux = gst_element_factory_make ("gstrtpssrcdemux", NULL)))
457 sess = g_new0 (GstRtpBinSession, 1);
458 sess->lock = g_mutex_new ();
461 sess->session = session;
463 sess->ptmap = g_hash_table_new_full (NULL, NULL, NULL,
464 (GDestroyNotify) gst_caps_unref);
465 rtpbin->sessions = g_slist_prepend (rtpbin->sessions, sess);
467 /* set NTP base or new session */
468 g_object_set (session, "ntp-ns-base", rtpbin->priv->ntp_ns_base, NULL);
469 /* configure SDES items */
470 GST_OBJECT_LOCK (rtpbin);
471 for (i = GST_RTCP_SDES_CNAME; i < GST_RTCP_SDES_PRIV; i++) {
472 g_object_set (session, sdes_type_to_name (i), rtpbin->sdes[i], NULL);
474 GST_OBJECT_UNLOCK (rtpbin);
476 /* provide clock_rate to the session manager when needed */
477 g_signal_connect (session, "request-pt-map",
478 (GCallback) pt_map_requested, sess);
480 g_signal_connect (sess->session, "on-new-ssrc",
481 (GCallback) on_new_ssrc, sess);
482 g_signal_connect (sess->session, "on-ssrc-collision",
483 (GCallback) on_ssrc_collision, sess);
484 g_signal_connect (sess->session, "on-ssrc-validated",
485 (GCallback) on_ssrc_validated, sess);
486 g_signal_connect (sess->session, "on-ssrc-active",
487 (GCallback) on_ssrc_active, sess);
488 g_signal_connect (sess->session, "on-ssrc-sdes",
489 (GCallback) on_ssrc_sdes, sess);
490 g_signal_connect (sess->session, "on-bye-ssrc",
491 (GCallback) on_bye_ssrc, sess);
492 g_signal_connect (sess->session, "on-bye-timeout",
493 (GCallback) on_bye_timeout, sess);
494 g_signal_connect (sess->session, "on-timeout", (GCallback) on_timeout, sess);
496 /* FIXME, change state only to what's needed */
497 gst_bin_add (GST_BIN_CAST (rtpbin), session);
498 gst_element_set_state (session, GST_STATE_PLAYING);
499 gst_bin_add (GST_BIN_CAST (rtpbin), demux);
500 gst_element_set_state (demux, GST_STATE_PLAYING);
507 g_warning ("gstrtpbin: could not create gstrtpsession element");
512 gst_object_unref (session);
513 g_warning ("gstrtpbin: could not create gstrtpssrcdemux element");
519 free_session (GstRtpBinSession * sess)
525 gst_element_set_state (sess->session, GST_STATE_NULL);
526 gst_element_set_state (sess->demux, GST_STATE_NULL);
528 if (sess->recv_rtp_sink != NULL)
529 gst_element_release_request_pad (sess->session, sess->recv_rtp_sink);
530 if (sess->recv_rtp_src != NULL)
531 gst_object_unref (sess->recv_rtp_src);
532 if (sess->recv_rtcp_sink != NULL)
533 gst_element_release_request_pad (sess->session, sess->recv_rtcp_sink);
534 if (sess->sync_src != NULL)
535 gst_object_unref (sess->sync_src);
536 if (sess->send_rtp_sink != NULL)
537 gst_element_release_request_pad (sess->session, sess->send_rtp_sink);
538 if (sess->send_rtp_src != NULL)
539 gst_object_unref (sess->send_rtp_src);
540 if (sess->send_rtcp_src != NULL)
541 gst_element_release_request_pad (sess->session, sess->send_rtcp_src);
543 gst_bin_remove (GST_BIN_CAST (bin), sess->session);
544 gst_bin_remove (GST_BIN_CAST (bin), sess->demux);
546 g_slist_foreach (sess->streams, (GFunc) free_stream, NULL);
547 g_slist_free (sess->streams);
549 g_mutex_free (sess->lock);
550 g_hash_table_destroy (sess->ptmap);
552 bin->sessions = g_slist_remove (bin->sessions, sess);
558 static GstRtpBinStream *
559 find_stream_by_ssrc (GstRtpBinSession * session, guint32 ssrc)
563 for (walk = session->streams; walk; walk = g_slist_next (walk)) {
564 GstRtpBinStream *stream = (GstRtpBinStream *) walk->data;
566 if (stream->ssrc == ssrc)
573 /* get the payload type caps for the specific payload @pt in @session */
575 get_pt_map (GstRtpBinSession * session, guint pt)
577 GstCaps *caps = NULL;
580 GValue args[3] = { {0}, {0}, {0} };
582 GST_DEBUG ("searching pt %d in cache", pt);
584 GST_RTP_SESSION_LOCK (session);
586 /* first look in the cache */
587 caps = g_hash_table_lookup (session->ptmap, GINT_TO_POINTER (pt));
595 GST_DEBUG ("emiting signal for pt %d in session %d", pt, session->id);
597 /* not in cache, send signal to request caps */
598 g_value_init (&args[0], GST_TYPE_ELEMENT);
599 g_value_set_object (&args[0], bin);
600 g_value_init (&args[1], G_TYPE_UINT);
601 g_value_set_uint (&args[1], session->id);
602 g_value_init (&args[2], G_TYPE_UINT);
603 g_value_set_uint (&args[2], pt);
605 g_value_init (&ret, GST_TYPE_CAPS);
606 g_value_set_boxed (&ret, NULL);
608 g_signal_emitv (args, gst_rtp_bin_signals[SIGNAL_REQUEST_PT_MAP], 0, &ret);
610 g_value_unset (&args[0]);
611 g_value_unset (&args[1]);
612 g_value_unset (&args[2]);
613 caps = (GstCaps *) g_value_dup_boxed (&ret);
614 g_value_unset (&ret);
618 GST_DEBUG ("caching pt %d as %" GST_PTR_FORMAT, pt, caps);
620 /* store in cache, take additional ref */
621 g_hash_table_insert (session->ptmap, GINT_TO_POINTER (pt),
622 gst_caps_ref (caps));
625 GST_RTP_SESSION_UNLOCK (session);
632 GST_RTP_SESSION_UNLOCK (session);
633 GST_DEBUG ("no pt map could be obtained");
639 return_true (gpointer key, gpointer value, gpointer user_data)
645 gst_rtp_bin_clear_pt_map (GstRtpBin * bin)
647 GSList *sessions, *streams;
649 GST_RTP_BIN_LOCK (bin);
650 GST_DEBUG_OBJECT (bin, "clearing pt map");
651 for (sessions = bin->sessions; sessions; sessions = g_slist_next (sessions)) {
652 GstRtpBinSession *session = (GstRtpBinSession *) sessions->data;
654 GST_DEBUG_OBJECT (bin, "clearing session %p", session);
655 g_signal_emit_by_name (session->session, "clear-pt-map", NULL);
657 GST_RTP_SESSION_LOCK (session);
658 g_hash_table_foreach_remove (session->ptmap, return_true, NULL);
660 for (streams = session->streams; streams; streams = g_slist_next (streams)) {
661 GstRtpBinStream *stream = (GstRtpBinStream *) streams->data;
663 GST_DEBUG_OBJECT (bin, "clearing stream %p", stream);
664 g_signal_emit_by_name (stream->buffer, "clear-pt-map", NULL);
665 g_signal_emit_by_name (stream->demux, "clear-pt-map", NULL);
667 GST_RTP_SESSION_UNLOCK (session);
669 GST_RTP_BIN_UNLOCK (bin);
672 /* get a client with the given SDES name. Must be called with RTP_BIN_LOCK */
673 static GstRtpBinClient *
674 get_client (GstRtpBin * bin, guint8 len, guint8 * data, gboolean * created)
676 GstRtpBinClient *result = NULL;
679 for (walk = bin->clients; walk; walk = g_slist_next (walk)) {
680 GstRtpBinClient *client = (GstRtpBinClient *) walk->data;
682 if (len != client->cname_len)
685 if (!strncmp ((gchar *) data, client->cname, client->cname_len)) {
686 GST_DEBUG_OBJECT (bin, "found existing client %p with CNAME %s", client,
693 /* nothing found, create one */
694 if (result == NULL) {
695 result = g_new0 (GstRtpBinClient, 1);
696 result->cname = g_strndup ((gchar *) data, len);
697 result->cname_len = len;
698 result->min_delta = G_MAXINT64;
699 bin->clients = g_slist_prepend (bin->clients, result);
700 GST_DEBUG_OBJECT (bin, "created new client %p with CNAME %s", result,
707 free_client (GstRtpBinClient * client)
709 g_slist_free (client->streams);
710 g_free (client->cname);
714 /* associate a stream to the given CNAME. This will make sure all streams for
715 * that CNAME are synchronized together. */
717 gst_rtp_bin_associate (GstRtpBin * bin, GstRtpBinStream * stream, guint8 len,
720 GstRtpBinClient *client;
724 /* first find or create the CNAME */
725 GST_RTP_BIN_LOCK (bin);
726 client = get_client (bin, len, data, &created);
728 /* find stream in the client */
729 for (walk = client->streams; walk; walk = g_slist_next (walk)) {
730 GstRtpBinStream *ostream = (GstRtpBinStream *) walk->data;
732 if (ostream == stream)
735 /* not found, add it to the list */
737 GST_DEBUG_OBJECT (bin,
738 "new association of SSRC %08x with client %p with CNAME %s",
739 stream->ssrc, client, client->cname);
740 client->streams = g_slist_prepend (client->streams, stream);
743 GST_DEBUG_OBJECT (bin,
744 "found association of SSRC %08x with client %p with CNAME %s",
745 stream->ssrc, client, client->cname);
748 /* we can only continue if we know the local clock-base and clock-rate */
749 if (stream->clock_base == -1)
752 if (stream->clock_rate <= 0) {
754 GstCaps *caps = NULL;
755 GstStructure *s = NULL;
757 GST_RTP_SESSION_LOCK (stream->session);
758 pt = stream->last_pt;
759 GST_RTP_SESSION_UNLOCK (stream->session);
764 caps = get_pt_map (stream->session, pt);
768 s = gst_caps_get_structure (caps, 0);
769 gst_structure_get_int (s, "clock-rate", &stream->clock_rate);
770 gst_caps_unref (caps);
772 if (stream->clock_rate <= 0)
776 /* map last RTP time to local timeline using our clock-base */
777 stream->local_rtp = stream->last_extrtptime - stream->clock_base;
779 GST_DEBUG_OBJECT (bin,
780 "base %" G_GUINT64_FORMAT ", extrtptime %" G_GUINT64_FORMAT
781 ", local RTP %" G_GUINT64_FORMAT ", clock-rate %d", stream->clock_base,
782 stream->last_extrtptime, stream->local_rtp, stream->clock_rate);
784 /* calculate local NTP time in gstreamer timestamp */
786 gst_util_uint64_scale_int (stream->local_rtp, GST_SECOND,
788 /* calculate delta between server and receiver */
789 stream->unix_delta = stream->last_unix - stream->local_unix;
791 GST_DEBUG_OBJECT (bin,
792 "local UNIX %" G_GUINT64_FORMAT ", remote UNIX %" G_GUINT64_FORMAT
793 ", delta %" G_GINT64_FORMAT, stream->local_unix, stream->last_unix,
796 /* recalc inter stream playout offset, but only if there are more than one
798 if (client->nstreams > 1) {
801 /* calculate the min of all deltas */
803 for (walk = client->streams; walk; walk = g_slist_next (walk)) {
804 GstRtpBinStream *ostream = (GstRtpBinStream *) walk->data;
806 if (ostream->unix_delta && ostream->unix_delta < min)
807 min = ostream->unix_delta;
810 GST_DEBUG_OBJECT (bin, "client %p min delta %" G_GINT64_FORMAT, client,
813 /* calculate offsets for each stream */
814 for (walk = client->streams; walk; walk = g_slist_next (walk)) {
815 GstRtpBinStream *ostream = (GstRtpBinStream *) walk->data;
817 if (ostream->unix_delta == 0)
820 ostream->ts_offset = ostream->unix_delta - min;
822 /* delta changed, see how much */
823 if (ostream->prev_ts_offset != ostream->ts_offset) {
826 if (ostream->prev_ts_offset > ostream->ts_offset)
827 diff = ostream->prev_ts_offset - ostream->ts_offset;
829 diff = ostream->ts_offset - ostream->prev_ts_offset;
831 /* only change diff when it changed more than 1 millisecond. This
832 * compensates for rounding errors in NTP to RTP timestamp
834 if (diff > GST_MSECOND)
835 g_object_set (ostream->buffer, "ts-offset", ostream->ts_offset, NULL);
837 ostream->prev_ts_offset = ostream->ts_offset;
839 GST_DEBUG_OBJECT (bin, "stream SSRC %08x, delta %" G_GINT64_FORMAT,
840 ostream->ssrc, ostream->ts_offset);
843 GST_RTP_BIN_UNLOCK (bin);
848 GST_WARNING_OBJECT (bin, "we have no clock-base");
849 GST_RTP_BIN_UNLOCK (bin);
854 GST_WARNING_OBJECT (bin, "we have no clock-rate");
855 GST_RTP_BIN_UNLOCK (bin);
860 #define GST_RTCP_BUFFER_FOR_PACKETS(b,buffer,packet) \
861 for ((b) = gst_rtcp_buffer_get_first_packet ((buffer), (packet)); (b); \
862 (b) = gst_rtcp_packet_move_to_next ((packet)))
864 #define GST_RTCP_SDES_FOR_ITEMS(b,packet) \
865 for ((b) = gst_rtcp_packet_sdes_first_item ((packet)); (b); \
866 (b) = gst_rtcp_packet_sdes_next_item ((packet)))
868 #define GST_RTCP_SDES_FOR_ENTRIES(b,packet) \
869 for ((b) = gst_rtcp_packet_sdes_first_entry ((packet)); (b); \
870 (b) = gst_rtcp_packet_sdes_next_entry ((packet)))
873 gst_rtp_bin_sync_chain (GstPad * pad, GstBuffer * buffer)
875 GstFlowReturn ret = GST_FLOW_OK;
876 GstRtpBinStream *stream;
878 GstRTCPPacket packet;
882 gboolean have_sr, have_sdes;
885 stream = gst_pad_get_element_private (pad);
888 GST_DEBUG_OBJECT (bin, "received sync packet");
890 if (!gst_rtcp_buffer_validate (buffer))
895 GST_RTCP_BUFFER_FOR_PACKETS (more, buffer, &packet) {
896 /* first packet must be SR or RR or else the validate would have failed */
897 switch (gst_rtcp_packet_get_type (&packet)) {
898 case GST_RTCP_TYPE_SR:
899 /* only parse first. There is only supposed to be one SR in the packet
900 * but we will deal with malformed packets gracefully */
903 /* get NTP and RTP times */
904 gst_rtcp_packet_sr_get_sender_info (&packet, &ssrc, &ntptime, &rtptime,
907 GST_DEBUG_OBJECT (bin, "received sync packet from SSRC %08x", ssrc);
908 /* ignore SR that is not ours */
909 if (ssrc != stream->ssrc)
914 /* store values in the stream */
915 stream->have_sync = TRUE;
916 stream->last_unix = gst_rtcp_ntp_to_unix (ntptime);
917 /* use extended timestamp */
918 gst_rtp_buffer_ext_timestamp (&stream->last_extrtptime, rtptime);
920 case GST_RTCP_TYPE_SDES:
922 gboolean more_items, more_entries;
924 /* only deal with first SDES, there is only supposed to be one SDES in
925 * the RTCP packet but we deal with bad packets gracefully. Also bail
926 * out if we have not seen an SR item yet. */
927 if (have_sdes || !have_sr)
930 GST_RTCP_SDES_FOR_ITEMS (more_items, &packet) {
931 /* skip items that are not about the SSRC of the sender */
932 if (gst_rtcp_packet_sdes_get_ssrc (&packet) != ssrc)
935 /* find the CNAME entry */
936 GST_RTCP_SDES_FOR_ENTRIES (more_entries, &packet) {
937 GstRTCPSDESType type;
941 gst_rtcp_packet_sdes_get_entry (&packet, &type, &len, &data);
943 if (type == GST_RTCP_SDES_CNAME) {
944 stream->clock_base = GST_BUFFER_OFFSET (buffer);
945 /* associate the stream to CNAME */
946 gst_rtp_bin_associate (bin, stream, len, data);
954 /* we can ignore these packets */
959 gst_buffer_unref (buffer);
966 /* this is fatal and should be filtered earlier */
967 GST_ELEMENT_ERROR (bin, STREAM, DECODE, (NULL),
968 ("invalid RTCP packet received"));
969 gst_buffer_unref (buffer);
970 return GST_FLOW_ERROR;
974 /* create a new stream with @ssrc in @session. Must be called with
975 * RTP_SESSION_LOCK. */
976 static GstRtpBinStream *
977 create_stream (GstRtpBinSession * session, guint32 ssrc)
979 GstElement *buffer, *demux;
980 GstRtpBinStream *stream;
981 GstPadTemplate *templ;
984 if (!(buffer = gst_element_factory_make ("gstrtpjitterbuffer", NULL)))
985 goto no_jitterbuffer;
987 if (!(demux = gst_element_factory_make ("gstrtpptdemux", NULL)))
990 stream = g_new0 (GstRtpBinStream, 1);
992 stream->bin = session->bin;
993 stream->session = session;
994 stream->buffer = buffer;
995 stream->demux = demux;
996 stream->last_extrtptime = -1;
997 stream->last_pt = -1;
998 stream->have_sync = FALSE;
999 session->streams = g_slist_prepend (session->streams, stream);
1001 /* make an internal sinkpad for RTCP sync packets. Take ownership of the
1002 * pad. We will link this pad later. */
1003 padname = g_strdup_printf ("sync_%d", ssrc);
1004 templ = gst_static_pad_template_get (&rtpbin_sync_sink_template);
1005 stream->sync_pad = gst_pad_new_from_template (templ, padname);
1006 gst_object_unref (templ);
1008 gst_object_ref (stream->sync_pad);
1009 gst_object_sink (stream->sync_pad);
1010 gst_pad_set_element_private (stream->sync_pad, stream);
1011 gst_pad_set_chain_function (stream->sync_pad, gst_rtp_bin_sync_chain);
1012 gst_pad_set_active (stream->sync_pad, TRUE);
1014 /* provide clock_rate to the jitterbuffer when needed */
1015 g_signal_connect (buffer, "request-pt-map",
1016 (GCallback) pt_map_requested, session);
1018 /* configure latency */
1019 g_object_set (buffer, "latency", session->bin->latency, NULL);
1021 gst_bin_add (GST_BIN_CAST (session->bin), buffer);
1022 gst_element_set_state (buffer, GST_STATE_PLAYING);
1023 gst_bin_add (GST_BIN_CAST (session->bin), demux);
1024 gst_element_set_state (demux, GST_STATE_PLAYING);
1027 gst_element_link (buffer, demux);
1034 g_warning ("gstrtpbin: could not create gstrtpjitterbuffer element");
1039 gst_object_unref (buffer);
1040 g_warning ("gstrtpbin: could not create gstrtpptdemux element");
1046 free_stream (GstRtpBinStream * stream)
1048 GstRtpBinSession *session;
1050 session = stream->session;
1052 gst_element_set_state (stream->buffer, GST_STATE_NULL);
1053 gst_element_set_state (stream->demux, GST_STATE_NULL);
1055 gst_bin_remove (GST_BIN_CAST (session->bin), stream->buffer);
1056 gst_bin_remove (GST_BIN_CAST (session->bin), stream->demux);
1058 gst_object_unref (stream->sync_pad);
1060 session->streams = g_slist_remove (session->streams, stream);
1065 /* GObject vmethods */
1066 static void gst_rtp_bin_dispose (GObject * object);
1067 static void gst_rtp_bin_finalize (GObject * object);
1068 static void gst_rtp_bin_set_property (GObject * object, guint prop_id,
1069 const GValue * value, GParamSpec * pspec);
1070 static void gst_rtp_bin_get_property (GObject * object, guint prop_id,
1071 GValue * value, GParamSpec * pspec);
1073 /* GstElement vmethods */
1074 static GstClock *gst_rtp_bin_provide_clock (GstElement * element);
1075 static GstStateChangeReturn gst_rtp_bin_change_state (GstElement * element,
1076 GstStateChange transition);
1077 static GstPad *gst_rtp_bin_request_new_pad (GstElement * element,
1078 GstPadTemplate * templ, const gchar * name);
1079 static void gst_rtp_bin_release_pad (GstElement * element, GstPad * pad);
1080 static void gst_rtp_bin_handle_message (GstBin * bin, GstMessage * message);
1081 static void gst_rtp_bin_clear_pt_map (GstRtpBin * bin);
1083 GST_BOILERPLATE (GstRtpBin, gst_rtp_bin, GstBin, GST_TYPE_BIN);
1086 gst_rtp_bin_base_init (gpointer klass)
1088 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
1091 gst_element_class_add_pad_template (element_class,
1092 gst_static_pad_template_get (&rtpbin_recv_rtp_sink_template));
1093 gst_element_class_add_pad_template (element_class,
1094 gst_static_pad_template_get (&rtpbin_recv_rtcp_sink_template));
1095 gst_element_class_add_pad_template (element_class,
1096 gst_static_pad_template_get (&rtpbin_send_rtp_sink_template));
1099 gst_element_class_add_pad_template (element_class,
1100 gst_static_pad_template_get (&rtpbin_recv_rtp_src_template));
1101 gst_element_class_add_pad_template (element_class,
1102 gst_static_pad_template_get (&rtpbin_send_rtcp_src_template));
1103 gst_element_class_add_pad_template (element_class,
1104 gst_static_pad_template_get (&rtpbin_send_rtp_src_template));
1106 gst_element_class_set_details (element_class, &rtpbin_details);
1110 gst_rtp_bin_class_init (GstRtpBinClass * klass)
1112 GObjectClass *gobject_class;
1113 GstElementClass *gstelement_class;
1114 GstBinClass *gstbin_class;
1116 gobject_class = (GObjectClass *) klass;
1117 gstelement_class = (GstElementClass *) klass;
1118 gstbin_class = (GstBinClass *) klass;
1120 g_type_class_add_private (klass, sizeof (GstRtpBinPrivate));
1122 gobject_class->dispose = gst_rtp_bin_dispose;
1123 gobject_class->finalize = gst_rtp_bin_finalize;
1124 gobject_class->set_property = gst_rtp_bin_set_property;
1125 gobject_class->get_property = gst_rtp_bin_get_property;
1127 g_object_class_install_property (gobject_class, PROP_LATENCY,
1128 g_param_spec_uint ("latency", "Buffer latency in ms",
1129 "Default amount of ms to buffer in the jitterbuffers", 0,
1130 G_MAXUINT, DEFAULT_LATENCY_MS, G_PARAM_READWRITE));
1133 * GstRtpBin::request-pt-map:
1134 * @rtpbin: the object which received the signal
1135 * @session: the session
1138 * Request the payload type as #GstCaps for @pt in @session.
1140 gst_rtp_bin_signals[SIGNAL_REQUEST_PT_MAP] =
1141 g_signal_new ("request-pt-map", G_TYPE_FROM_CLASS (klass),
1142 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRtpBinClass, request_pt_map),
1143 NULL, NULL, gst_rtp_bin_marshal_BOXED__UINT_UINT, GST_TYPE_CAPS, 2,
1144 G_TYPE_UINT, G_TYPE_UINT);
1146 * GstRtpBin::clear-pt-map:
1147 * @rtpbin: the object which received the signal
1149 * Clear all previously cached pt-mapping obtained with
1150 * GstRtpBin::request-pt-map.
1152 gst_rtp_bin_signals[SIGNAL_CLEAR_PT_MAP] =
1153 g_signal_new ("clear-pt-map", G_TYPE_FROM_CLASS (klass),
1154 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstRtpBinClass,
1155 clear_pt_map), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE,
1159 * GstRtpBin::on-new-ssrc:
1160 * @rtpbin: the object which received the signal
1161 * @session: the session
1164 * Notify of a new SSRC that entered @session.
1166 gst_rtp_bin_signals[SIGNAL_ON_NEW_SSRC] =
1167 g_signal_new ("on-new-ssrc", G_TYPE_FROM_CLASS (klass),
1168 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRtpBinClass, on_new_ssrc),
1169 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
1170 G_TYPE_UINT, G_TYPE_UINT);
1172 * GstRtpBin::on-ssrc-collision:
1173 * @rtpbin: the object which received the signal
1174 * @session: the session
1177 * Notify when we have an SSRC collision
1179 gst_rtp_bin_signals[SIGNAL_ON_SSRC_COLLISION] =
1180 g_signal_new ("on-ssrc-collision", G_TYPE_FROM_CLASS (klass),
1181 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRtpBinClass, on_ssrc_collision),
1182 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
1183 G_TYPE_UINT, G_TYPE_UINT);
1185 * GstRtpBin::on-ssrc-validated:
1186 * @rtpbin: the object which received the signal
1187 * @session: the session
1190 * Notify of a new SSRC that became validated.
1192 gst_rtp_bin_signals[SIGNAL_ON_SSRC_VALIDATED] =
1193 g_signal_new ("on-ssrc-validated", G_TYPE_FROM_CLASS (klass),
1194 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRtpBinClass, on_ssrc_validated),
1195 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
1196 G_TYPE_UINT, G_TYPE_UINT);
1198 * GstRtpBin::on-ssrc-active:
1199 * @rtpbin: the object which received the signal
1200 * @session: the session
1203 * Notify of a SSRC that is active, i.e., sending RTCP.
1205 gst_rtp_bin_signals[SIGNAL_ON_SSRC_ACTIVE] =
1206 g_signal_new ("on-ssrc-active", G_TYPE_FROM_CLASS (klass),
1207 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRtpBinClass, on_ssrc_active),
1208 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
1209 G_TYPE_UINT, G_TYPE_UINT);
1211 * GstRtpBin::on-ssrc-sdes:
1212 * @rtpbin: the object which received the signal
1213 * @session: the session
1216 * Notify of a SSRC that is active, i.e., sending RTCP.
1218 gst_rtp_bin_signals[SIGNAL_ON_SSRC_SDES] =
1219 g_signal_new ("on-ssrc-sdes", G_TYPE_FROM_CLASS (klass),
1220 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRtpBinClass, on_ssrc_sdes),
1221 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
1222 G_TYPE_UINT, G_TYPE_UINT);
1225 * GstRtpBin::on-bye-ssrc:
1226 * @rtpbin: the object which received the signal
1227 * @session: the session
1230 * Notify of an SSRC that became inactive because of a BYE packet.
1232 gst_rtp_bin_signals[SIGNAL_ON_BYE_SSRC] =
1233 g_signal_new ("on-bye-ssrc", G_TYPE_FROM_CLASS (klass),
1234 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRtpBinClass, on_bye_ssrc),
1235 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
1236 G_TYPE_UINT, G_TYPE_UINT);
1238 * GstRtpBin::on-bye-timeout:
1239 * @rtpbin: the object which received the signal
1240 * @session: the session
1243 * Notify of an SSRC that has timed out because of BYE
1245 gst_rtp_bin_signals[SIGNAL_ON_BYE_TIMEOUT] =
1246 g_signal_new ("on-bye-timeout", G_TYPE_FROM_CLASS (klass),
1247 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRtpBinClass, on_bye_timeout),
1248 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
1249 G_TYPE_UINT, G_TYPE_UINT);
1251 * GstRtpBin::on-timeout:
1252 * @rtpbin: the object which received the signal
1253 * @session: the session
1256 * Notify of an SSRC that has timed out
1258 gst_rtp_bin_signals[SIGNAL_ON_TIMEOUT] =
1259 g_signal_new ("on-timeout", G_TYPE_FROM_CLASS (klass),
1260 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRtpBinClass, on_timeout),
1261 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
1262 G_TYPE_UINT, G_TYPE_UINT);
1264 g_object_class_install_property (gobject_class, PROP_SDES_CNAME,
1265 g_param_spec_string ("sdes-cname", "SDES CNAME",
1266 "The CNAME to put in SDES messages of this session",
1267 DEFAULT_SDES_CNAME, G_PARAM_READWRITE));
1269 g_object_class_install_property (gobject_class, PROP_SDES_NAME,
1270 g_param_spec_string ("sdes-name", "SDES NAME",
1271 "The NAME to put in SDES messages of this session",
1272 DEFAULT_SDES_NAME, G_PARAM_READWRITE));
1274 g_object_class_install_property (gobject_class, PROP_SDES_EMAIL,
1275 g_param_spec_string ("sdes-email", "SDES EMAIL",
1276 "The EMAIL to put in SDES messages of this session",
1277 DEFAULT_SDES_EMAIL, G_PARAM_READWRITE));
1279 g_object_class_install_property (gobject_class, PROP_SDES_PHONE,
1280 g_param_spec_string ("sdes-phone", "SDES PHONE",
1281 "The PHONE to put in SDES messages of this session",
1282 DEFAULT_SDES_PHONE, G_PARAM_READWRITE));
1284 g_object_class_install_property (gobject_class, PROP_SDES_LOCATION,
1285 g_param_spec_string ("sdes-location", "SDES LOCATION",
1286 "The LOCATION to put in SDES messages of this session",
1287 DEFAULT_SDES_LOCATION, G_PARAM_READWRITE));
1289 g_object_class_install_property (gobject_class, PROP_SDES_TOOL,
1290 g_param_spec_string ("sdes-tool", "SDES TOOL",
1291 "The TOOL to put in SDES messages of this session",
1292 DEFAULT_SDES_TOOL, G_PARAM_READWRITE));
1294 g_object_class_install_property (gobject_class, PROP_SDES_NOTE,
1295 g_param_spec_string ("sdes-note", "SDES NOTE",
1296 "The NOTE to put in SDES messages of this session",
1297 DEFAULT_SDES_NOTE, G_PARAM_READWRITE));
1299 gstelement_class->provide_clock =
1300 GST_DEBUG_FUNCPTR (gst_rtp_bin_provide_clock);
1301 gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_rtp_bin_change_state);
1302 gstelement_class->request_new_pad =
1303 GST_DEBUG_FUNCPTR (gst_rtp_bin_request_new_pad);
1304 gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_rtp_bin_release_pad);
1306 gstbin_class->handle_message = GST_DEBUG_FUNCPTR (gst_rtp_bin_handle_message);
1308 klass->clear_pt_map = GST_DEBUG_FUNCPTR (gst_rtp_bin_clear_pt_map);
1310 GST_DEBUG_CATEGORY_INIT (gst_rtp_bin_debug, "rtpbin", 0, "RTP bin");
1314 gst_rtp_bin_init (GstRtpBin * rtpbin, GstRtpBinClass * klass)
1318 rtpbin->priv = GST_RTP_BIN_GET_PRIVATE (rtpbin);
1319 rtpbin->priv->bin_lock = g_mutex_new ();
1320 rtpbin->provided_clock = gst_system_clock_obtain ();
1321 rtpbin->latency = DEFAULT_LATENCY_MS;
1323 /* some default SDES entries */
1324 str = g_strdup_printf ("%s@%s", g_get_user_name (), g_get_host_name ());
1325 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_CNAME, str);
1328 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_NAME, g_get_real_name ());
1329 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_TOOL, "GStreamer");
1333 gst_rtp_bin_dispose (GObject * object)
1337 rtpbin = GST_RTP_BIN (object);
1339 g_slist_foreach (rtpbin->sessions, (GFunc) free_session, NULL);
1340 g_slist_free (rtpbin->sessions);
1341 rtpbin->sessions = NULL;
1342 g_slist_foreach (rtpbin->clients, (GFunc) free_client, NULL);
1343 g_slist_free (rtpbin->clients);
1344 rtpbin->clients = NULL;
1346 G_OBJECT_CLASS (parent_class)->dispose (object);
1350 gst_rtp_bin_finalize (GObject * object)
1355 rtpbin = GST_RTP_BIN (object);
1357 for (i = 0; i < 9; i++)
1358 g_free (rtpbin->sdes[i]);
1360 g_mutex_free (rtpbin->priv->bin_lock);
1361 gst_object_unref (rtpbin->provided_clock);
1363 G_OBJECT_CLASS (parent_class)->finalize (object);
1366 static const gchar *
1367 sdes_type_to_name (GstRTCPSDESType type)
1369 const gchar *result;
1372 case GST_RTCP_SDES_CNAME:
1373 result = "sdes-cname";
1375 case GST_RTCP_SDES_NAME:
1376 result = "sdes-name";
1378 case GST_RTCP_SDES_EMAIL:
1379 result = "sdes-email";
1381 case GST_RTCP_SDES_PHONE:
1382 result = "sdes-phone";
1384 case GST_RTCP_SDES_LOC:
1385 result = "sdes-location";
1387 case GST_RTCP_SDES_TOOL:
1388 result = "sdes-tool";
1390 case GST_RTCP_SDES_NOTE:
1391 result = "sdes-note";
1393 case GST_RTCP_SDES_PRIV:
1394 result = "sdes-priv";
1404 gst_rtp_bin_set_sdes_string (GstRtpBin * bin, GstRTCPSDESType type,
1410 if (type < 0 || type > 8)
1413 GST_OBJECT_LOCK (bin);
1414 g_free (bin->sdes[type]);
1415 bin->sdes[type] = g_strdup (data);
1416 name = sdes_type_to_name (type);
1417 /* store in all sessions */
1418 for (item = bin->sessions; item; item = g_slist_next (item))
1419 g_object_set (item->data, name, bin->sdes[type], NULL);
1420 GST_OBJECT_UNLOCK (bin);
1424 gst_rtp_bin_get_sdes_string (GstRtpBin * bin, GstRTCPSDESType type)
1428 if (type < 0 || type > 8)
1431 GST_OBJECT_LOCK (bin);
1432 result = g_strdup (bin->sdes[type]);
1433 GST_OBJECT_UNLOCK (bin);
1439 gst_rtp_bin_set_property (GObject * object, guint prop_id,
1440 const GValue * value, GParamSpec * pspec)
1444 rtpbin = GST_RTP_BIN (object);
1448 GST_RTP_BIN_LOCK (rtpbin);
1449 rtpbin->latency = g_value_get_uint (value);
1450 GST_RTP_BIN_UNLOCK (rtpbin);
1452 case PROP_SDES_CNAME:
1453 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_CNAME,
1454 g_value_get_string (value));
1456 case PROP_SDES_NAME:
1457 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_NAME,
1458 g_value_get_string (value));
1460 case PROP_SDES_EMAIL:
1461 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_EMAIL,
1462 g_value_get_string (value));
1464 case PROP_SDES_PHONE:
1465 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_PHONE,
1466 g_value_get_string (value));
1468 case PROP_SDES_LOCATION:
1469 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_LOC,
1470 g_value_get_string (value));
1472 case PROP_SDES_TOOL:
1473 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_TOOL,
1474 g_value_get_string (value));
1476 case PROP_SDES_NOTE:
1477 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_NOTE,
1478 g_value_get_string (value));
1481 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1487 gst_rtp_bin_get_property (GObject * object, guint prop_id,
1488 GValue * value, GParamSpec * pspec)
1492 rtpbin = GST_RTP_BIN (object);
1496 GST_RTP_BIN_LOCK (rtpbin);
1497 g_value_set_uint (value, rtpbin->latency);
1498 GST_RTP_BIN_UNLOCK (rtpbin);
1500 case PROP_SDES_CNAME:
1501 g_value_take_string (value, gst_rtp_bin_get_sdes_string (rtpbin,
1502 GST_RTCP_SDES_CNAME));
1504 case PROP_SDES_NAME:
1505 g_value_take_string (value, gst_rtp_bin_get_sdes_string (rtpbin,
1506 GST_RTCP_SDES_NAME));
1508 case PROP_SDES_EMAIL:
1509 g_value_take_string (value, gst_rtp_bin_get_sdes_string (rtpbin,
1510 GST_RTCP_SDES_EMAIL));
1512 case PROP_SDES_PHONE:
1513 g_value_take_string (value, gst_rtp_bin_get_sdes_string (rtpbin,
1514 GST_RTCP_SDES_PHONE));
1516 case PROP_SDES_LOCATION:
1517 g_value_take_string (value, gst_rtp_bin_get_sdes_string (rtpbin,
1518 GST_RTCP_SDES_LOC));
1520 case PROP_SDES_TOOL:
1521 g_value_take_string (value, gst_rtp_bin_get_sdes_string (rtpbin,
1522 GST_RTCP_SDES_TOOL));
1524 case PROP_SDES_NOTE:
1525 g_value_take_string (value, gst_rtp_bin_get_sdes_string (rtpbin,
1526 GST_RTCP_SDES_NOTE));
1529 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1535 gst_rtp_bin_provide_clock (GstElement * element)
1539 rtpbin = GST_RTP_BIN (element);
1541 return GST_CLOCK_CAST (gst_object_ref (rtpbin->provided_clock));
1545 gst_rtp_bin_handle_message (GstBin * bin, GstMessage * message)
1549 rtpbin = GST_RTP_BIN (bin);
1551 switch (GST_MESSAGE_TYPE (message)) {
1552 case GST_MESSAGE_ELEMENT:
1554 const GstStructure *s = gst_message_get_structure (message);
1556 /* we change the structure name and add the session ID to it */
1557 if (gst_structure_has_name (s, "GstRTPSessionSDES")) {
1560 /* find the session, the message source has it */
1561 for (walk = rtpbin->sessions; walk; walk = g_slist_next (walk)) {
1562 GstRtpBinSession *sess = (GstRtpBinSession *) walk->data;
1564 /* if we found the session, change message. else we exit the loop and
1565 * leave the message unchanged */
1566 if (GST_OBJECT_CAST (sess->session) == GST_MESSAGE_SRC (message)) {
1567 message = gst_message_make_writable (message);
1568 s = gst_message_get_structure (message);
1570 gst_structure_set_name ((GstStructure *) s, "GstRTPBinSDES");
1572 gst_structure_set ((GstStructure *) s, "session", G_TYPE_UINT,
1578 /* fallthrough to forward the modified message to the parent */
1582 GST_BIN_CLASS (parent_class)->handle_message (bin, message);
1589 calc_ntp_ns_base (GstRtpBin * bin)
1595 /* get the current time and convert it to NTP time in nanoseconds */
1596 g_get_current_time (¤t);
1597 now = GST_TIMEVAL_TO_TIME (current);
1598 now += (2208988800LL * GST_SECOND);
1600 GST_RTP_BIN_LOCK (bin);
1601 bin->priv->ntp_ns_base = now;
1602 for (walk = bin->sessions; walk; walk = g_slist_next (walk)) {
1603 GstRtpBinSession *session = (GstRtpBinSession *) walk->data;
1605 g_object_set (session->session, "ntp-ns-base", now, NULL);
1607 GST_RTP_BIN_UNLOCK (bin);
1612 static GstStateChangeReturn
1613 gst_rtp_bin_change_state (GstElement * element, GstStateChange transition)
1615 GstStateChangeReturn res;
1618 rtpbin = GST_RTP_BIN (element);
1620 switch (transition) {
1621 case GST_STATE_CHANGE_NULL_TO_READY:
1623 case GST_STATE_CHANGE_READY_TO_PAUSED:
1625 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
1626 calc_ntp_ns_base (rtpbin);
1632 res = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1634 switch (transition) {
1635 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
1637 case GST_STATE_CHANGE_PAUSED_TO_READY:
1639 case GST_STATE_CHANGE_READY_TO_NULL:
1647 /* a new pad (SSRC) was created in @session */
1649 new_payload_found (GstElement * element, guint pt, GstPad * pad,
1650 GstRtpBinStream * stream)
1653 GstElementClass *klass;
1654 GstPadTemplate *templ;
1658 rtpbin = stream->bin;
1660 GST_DEBUG ("new payload pad %d", pt);
1662 /* ghost the pad to the parent */
1663 klass = GST_ELEMENT_GET_CLASS (rtpbin);
1664 templ = gst_element_class_get_pad_template (klass, "recv_rtp_src_%d_%d_%d");
1665 padname = g_strdup_printf ("recv_rtp_src_%d_%u_%d",
1666 stream->session->id, stream->ssrc, pt);
1667 gpad = gst_ghost_pad_new_from_template (padname, pad, templ);
1670 gst_pad_set_caps (gpad, GST_PAD_CAPS (pad));
1671 gst_pad_set_active (gpad, TRUE);
1672 gst_element_add_pad (GST_ELEMENT_CAST (rtpbin), gpad);
1676 pt_map_requested (GstElement * element, guint pt, GstRtpBinSession * session)
1681 rtpbin = session->bin;
1683 GST_DEBUG_OBJECT (rtpbin, "payload map requested for pt %d in session %d", pt,
1686 caps = get_pt_map (session, pt);
1695 GST_DEBUG_OBJECT (rtpbin, "could not get caps");
1700 /* emited when caps changed for the session */
1702 caps_changed (GstPad * pad, GParamSpec * pspec, GstRtpBinSession * session)
1707 const GstStructure *s;
1711 g_object_get (pad, "caps", &caps, NULL);
1716 GST_DEBUG_OBJECT (bin, "got caps %" GST_PTR_FORMAT, caps);
1718 s = gst_caps_get_structure (caps, 0);
1720 /* get payload, finish when it's not there */
1721 if (!gst_structure_get_int (s, "payload", &payload))
1724 GST_RTP_SESSION_LOCK (session);
1725 GST_DEBUG_OBJECT (bin, "insert caps for payload %d", payload);
1726 g_hash_table_insert (session->ptmap, GINT_TO_POINTER (payload), caps);
1727 GST_RTP_SESSION_UNLOCK (session);
1730 /* Stores the last payload type received on a particular stream */
1732 payload_type_change (GstElement * element, guint pt, GstRtpBinStream * stream)
1734 GST_RTP_SESSION_LOCK (stream->session);
1735 stream->last_pt = pt;
1736 GST_RTP_SESSION_UNLOCK (stream->session);
1739 /* a new pad (SSRC) was created in @session */
1741 new_ssrc_pad_found (GstElement * element, guint ssrc, GstPad * pad,
1742 GstRtpBinSession * session)
1744 GstRtpBinStream *stream;
1745 GstPad *sinkpad, *srcpad;
1749 GST_DEBUG_OBJECT (session->bin, "new SSRC pad %08x", ssrc);
1751 GST_RTP_SESSION_LOCK (session);
1753 /* create new stream */
1754 stream = create_stream (session, ssrc);
1758 /* get the caps of the pad, we need the clock-rate and base_time if any. */
1759 if ((caps = gst_pad_get_caps (pad))) {
1760 const GstStructure *s;
1763 GST_DEBUG_OBJECT (session->bin, "pad has caps %" GST_PTR_FORMAT, caps);
1765 s = gst_caps_get_structure (caps, 0);
1767 if (!gst_structure_get_int (s, "clock-rate", &stream->clock_rate)) {
1768 stream->clock_rate = -1;
1770 GST_WARNING_OBJECT (session->bin,
1771 "Caps have no clock rate %s from pad %s:%s",
1772 gst_caps_to_string (caps), GST_DEBUG_PAD_NAME (pad));
1775 if (gst_structure_get_uint (s, "clock-base", &val))
1776 stream->clock_base = val;
1778 stream->clock_base = -1;
1780 gst_caps_unref (caps);
1783 /* get pad and link */
1784 GST_DEBUG_OBJECT (session->bin, "linking jitterbuffer");
1785 padname = g_strdup_printf ("src_%d", ssrc);
1786 srcpad = gst_element_get_static_pad (element, padname);
1788 sinkpad = gst_element_get_static_pad (stream->buffer, "sink");
1789 gst_pad_link (srcpad, sinkpad);
1790 gst_object_unref (sinkpad);
1791 gst_object_unref (srcpad);
1793 /* get the RTCP sync pad */
1794 GST_DEBUG_OBJECT (session->bin, "linking sync pad");
1795 padname = g_strdup_printf ("rtcp_src_%d", ssrc);
1796 srcpad = gst_element_get_static_pad (element, padname);
1798 gst_pad_link (srcpad, stream->sync_pad);
1799 gst_object_unref (srcpad);
1801 /* connect to the new-pad signal of the payload demuxer, this will expose the
1802 * new pad by ghosting it. */
1803 stream->demux_newpad_sig = g_signal_connect (stream->demux,
1804 "new-payload-type", (GCallback) new_payload_found, stream);
1805 /* connect to the request-pt-map signal. This signal will be emited by the
1806 * demuxer so that it can apply a proper caps on the buffers for the
1808 stream->demux_ptreq_sig = g_signal_connect (stream->demux,
1809 "request-pt-map", (GCallback) pt_map_requested, session);
1810 /* connect to the payload-type-change signal so that we can know which
1811 * PT is the current PT so that the jitterbuffer can be matched to the right
1813 stream->demux_pt_change_sig = g_signal_connect (stream->demux,
1814 "payload-type-change", (GCallback) payload_type_change, stream);
1816 GST_RTP_SESSION_UNLOCK (session);
1823 GST_RTP_SESSION_UNLOCK (session);
1824 GST_DEBUG_OBJECT (session->bin, "could not create stream");
1829 /* Create a pad for receiving RTP for the session in @name. Must be called with
1833 create_recv_rtp (GstRtpBin * rtpbin, GstPadTemplate * templ, const gchar * name)
1835 GstPad *result, *sinkdpad;
1837 GstRtpBinSession *session;
1838 GstPadLinkReturn lres;
1840 /* first get the session number */
1841 if (name == NULL || sscanf (name, "recv_rtp_sink_%d", &sessid) != 1)
1844 GST_DEBUG_OBJECT (rtpbin, "finding session %d", sessid);
1846 /* get or create session */
1847 session = find_session_by_id (rtpbin, sessid);
1849 GST_DEBUG_OBJECT (rtpbin, "creating session %d", sessid);
1850 /* create session now */
1851 session = create_session (rtpbin, sessid);
1852 if (session == NULL)
1856 /* check if pad was requested */
1857 if (session->recv_rtp_sink != NULL)
1860 GST_DEBUG_OBJECT (rtpbin, "getting RTP sink pad");
1861 /* get recv_rtp pad and store */
1862 session->recv_rtp_sink =
1863 gst_element_get_request_pad (session->session, "recv_rtp_sink");
1864 if (session->recv_rtp_sink == NULL)
1867 g_signal_connect (session->recv_rtp_sink, "notify::caps",
1868 (GCallback) caps_changed, session);
1870 GST_DEBUG_OBJECT (rtpbin, "getting RTP src pad");
1871 /* get srcpad, link to SSRCDemux */
1872 session->recv_rtp_src =
1873 gst_element_get_static_pad (session->session, "recv_rtp_src");
1874 if (session->recv_rtp_src == NULL)
1877 GST_DEBUG_OBJECT (rtpbin, "getting demuxer RTP sink pad");
1878 sinkdpad = gst_element_get_static_pad (session->demux, "sink");
1879 GST_DEBUG_OBJECT (rtpbin, "linking demuxer RTP sink pad");
1880 lres = gst_pad_link (session->recv_rtp_src, sinkdpad);
1881 gst_object_unref (sinkdpad);
1882 if (lres != GST_PAD_LINK_OK)
1885 /* connect to the new-ssrc-pad signal of the SSRC demuxer */
1886 session->demux_newpad_sig = g_signal_connect (session->demux,
1887 "new-ssrc-pad", (GCallback) new_ssrc_pad_found, session);
1889 GST_DEBUG_OBJECT (rtpbin, "ghosting session sink pad");
1891 gst_ghost_pad_new_from_template (name, session->recv_rtp_sink, templ);
1892 gst_pad_set_active (result, TRUE);
1893 gst_element_add_pad (GST_ELEMENT_CAST (rtpbin), result);
1900 g_warning ("gstrtpbin: invalid name given");
1905 /* create_session already warned */
1910 g_warning ("gstrtpbin: recv_rtp pad already requested for session %d",
1916 g_warning ("gstrtpbin: failed to get session pad");
1921 g_warning ("gstrtpbin: failed to link pads");
1926 /* Create a pad for receiving RTCP for the session in @name. Must be called with
1930 create_recv_rtcp (GstRtpBin * rtpbin, GstPadTemplate * templ,
1935 GstRtpBinSession *session;
1937 GstPadLinkReturn lres;
1939 /* first get the session number */
1940 if (name == NULL || sscanf (name, "recv_rtcp_sink_%d", &sessid) != 1)
1943 GST_DEBUG_OBJECT (rtpbin, "finding session %d", sessid);
1945 /* get or create the session */
1946 session = find_session_by_id (rtpbin, sessid);
1948 GST_DEBUG_OBJECT (rtpbin, "creating session %d", sessid);
1949 /* create session now */
1950 session = create_session (rtpbin, sessid);
1951 if (session == NULL)
1955 /* check if pad was requested */
1956 if (session->recv_rtcp_sink != NULL)
1959 /* get recv_rtp pad and store */
1960 GST_DEBUG_OBJECT (rtpbin, "getting RTCP sink pad");
1961 session->recv_rtcp_sink =
1962 gst_element_get_request_pad (session->session, "recv_rtcp_sink");
1963 if (session->recv_rtcp_sink == NULL)
1966 /* get srcpad, link to SSRCDemux */
1967 GST_DEBUG_OBJECT (rtpbin, "getting sync src pad");
1968 session->sync_src = gst_element_get_static_pad (session->session, "sync_src");
1969 if (session->sync_src == NULL)
1972 GST_DEBUG_OBJECT (rtpbin, "getting demuxer RTCP sink pad");
1973 sinkdpad = gst_element_get_static_pad (session->demux, "rtcp_sink");
1974 lres = gst_pad_link (session->sync_src, sinkdpad);
1975 gst_object_unref (sinkdpad);
1976 if (lres != GST_PAD_LINK_OK)
1980 gst_ghost_pad_new_from_template (name, session->recv_rtcp_sink, templ);
1981 gst_pad_set_active (result, TRUE);
1982 gst_element_add_pad (GST_ELEMENT_CAST (rtpbin), result);
1989 g_warning ("gstrtpbin: invalid name given");
1994 /* create_session already warned */
1999 g_warning ("gstrtpbin: recv_rtcp pad already requested for session %d",
2005 g_warning ("gstrtpbin: failed to get session pad");
2010 g_warning ("gstrtpbin: failed to link pads");
2015 /* Create a pad for sending RTP for the session in @name. Must be called with
2019 create_send_rtp (GstRtpBin * rtpbin, GstPadTemplate * templ, const gchar * name)
2021 GstPad *result, *srcghost;
2024 GstRtpBinSession *session;
2025 GstElementClass *klass;
2027 /* first get the session number */
2028 if (name == NULL || sscanf (name, "send_rtp_sink_%d", &sessid) != 1)
2031 /* get or create session */
2032 session = find_session_by_id (rtpbin, sessid);
2034 /* create session now */
2035 session = create_session (rtpbin, sessid);
2036 if (session == NULL)
2040 /* check if pad was requested */
2041 if (session->send_rtp_sink != NULL)
2044 /* get send_rtp pad and store */
2045 session->send_rtp_sink =
2046 gst_element_get_request_pad (session->session, "send_rtp_sink");
2047 if (session->send_rtp_sink == NULL)
2051 gst_ghost_pad_new_from_template (name, session->send_rtp_sink, templ);
2052 gst_pad_set_active (result, TRUE);
2053 gst_element_add_pad (GST_ELEMENT_CAST (rtpbin), result);
2056 session->send_rtp_src =
2057 gst_element_get_static_pad (session->session, "send_rtp_src");
2058 if (session->send_rtp_src == NULL)
2061 /* ghost the new source pad */
2062 klass = GST_ELEMENT_GET_CLASS (rtpbin);
2063 gname = g_strdup_printf ("send_rtp_src_%d", sessid);
2064 templ = gst_element_class_get_pad_template (klass, "send_rtp_src_%d");
2066 gst_ghost_pad_new_from_template (gname, session->send_rtp_src, templ);
2067 gst_pad_set_active (srcghost, TRUE);
2068 gst_element_add_pad (GST_ELEMENT_CAST (rtpbin), srcghost);
2076 g_warning ("gstrtpbin: invalid name given");
2081 /* create_session already warned */
2086 g_warning ("gstrtpbin: send_rtp pad already requested for session %d",
2092 g_warning ("gstrtpbin: failed to get session pad for session %d", sessid);
2097 g_warning ("gstrtpbin: failed to get rtp source pad for session %d",
2103 /* Create a pad for sending RTCP for the session in @name. Must be called with
2107 create_rtcp (GstRtpBin * rtpbin, GstPadTemplate * templ, const gchar * name)
2111 GstRtpBinSession *session;
2113 /* first get the session number */
2114 if (name == NULL || sscanf (name, "send_rtcp_src_%d", &sessid) != 1)
2117 /* get or create session */
2118 session = find_session_by_id (rtpbin, sessid);
2122 /* check if pad was requested */
2123 if (session->send_rtcp_src != NULL)
2126 /* get rtcp_src pad and store */
2127 session->send_rtcp_src =
2128 gst_element_get_request_pad (session->session, "send_rtcp_src");
2129 if (session->send_rtcp_src == NULL)
2133 gst_ghost_pad_new_from_template (name, session->send_rtcp_src, templ);
2134 gst_pad_set_active (result, TRUE);
2135 gst_element_add_pad (GST_ELEMENT_CAST (rtpbin), result);
2142 g_warning ("gstrtpbin: invalid name given");
2147 g_warning ("gstrtpbin: session with id %d does not exist", sessid);
2152 g_warning ("gstrtpbin: send_rtcp_src pad already requested for session %d",
2158 g_warning ("gstrtpbin: failed to get rtcp pad for session %d", sessid);
2163 /* If the requested name is NULL we should create a name with
2164 * the session number assuming we want the lowest posible session
2165 * with a free pad like the template */
2167 gst_rtp_bin_get_free_pad_name (GstElement * element, GstPadTemplate * templ)
2169 gboolean name_found = FALSE;
2172 GstIterator *pad_it = NULL;
2173 gchar *pad_name = NULL;
2175 GST_DEBUG_OBJECT (element, "find a free pad name for template");
2176 while (!name_found) {
2178 pad_name = g_strdup_printf (templ->name_template, session++);
2179 pad_it = gst_element_iterate_pads (GST_ELEMENT (element));
2181 while (gst_iterator_next (pad_it, (gpointer) & pad) == GST_ITERATOR_OK) {
2184 name = gst_pad_get_name (pad);
2185 if (strcmp (name, pad_name) == 0)
2189 gst_iterator_free (pad_it);
2192 GST_DEBUG_OBJECT (element, "free pad name found: '%s'", pad_name);
2199 gst_rtp_bin_request_new_pad (GstElement * element,
2200 GstPadTemplate * templ, const gchar * name)
2203 GstElementClass *klass;
2205 gchar *pad_name = NULL;
2207 g_return_val_if_fail (templ != NULL, NULL);
2208 g_return_val_if_fail (GST_IS_RTP_BIN (element), NULL);
2210 rtpbin = GST_RTP_BIN (element);
2211 klass = GST_ELEMENT_GET_CLASS (element);
2213 GST_RTP_BIN_LOCK (rtpbin);
2216 /* use a free pad name */
2217 pad_name = gst_rtp_bin_get_free_pad_name (element, templ);
2219 /* use the provided name */
2220 pad_name = g_strdup (name);
2223 GST_DEBUG ("Trying to request a pad with name %s", pad_name);
2225 /* figure out the template */
2226 if (templ == gst_element_class_get_pad_template (klass, "recv_rtp_sink_%d")) {
2227 result = create_recv_rtp (rtpbin, templ, pad_name);
2228 } else if (templ == gst_element_class_get_pad_template (klass,
2229 "recv_rtcp_sink_%d")) {
2230 result = create_recv_rtcp (rtpbin, templ, pad_name);
2231 } else if (templ == gst_element_class_get_pad_template (klass,
2232 "send_rtp_sink_%d")) {
2233 result = create_send_rtp (rtpbin, templ, pad_name);
2234 } else if (templ == gst_element_class_get_pad_template (klass,
2235 "send_rtcp_src_%d")) {
2236 result = create_rtcp (rtpbin, templ, pad_name);
2238 goto wrong_template;
2241 GST_RTP_BIN_UNLOCK (rtpbin);
2249 GST_RTP_BIN_UNLOCK (rtpbin);
2250 g_warning ("gstrtpbin: this is not our template");
2256 gst_rtp_bin_release_pad (GstElement * element, GstPad * pad)