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. The session number must be specified when
60 * requesting the sink pad. 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;
295 /* the internal pad we use to get RTCP sync messages */
299 guint64 last_extrtptime;
301 /* mapping to local RTP and NTP time */
310 gint64 prev_ts_offset;
313 #define GST_RTP_SESSION_LOCK(sess) g_mutex_lock ((sess)->lock)
314 #define GST_RTP_SESSION_UNLOCK(sess) g_mutex_unlock ((sess)->lock)
316 /* Manages the receiving end of the packets.
318 * There is one such structure for each RTP session (audio/video/...).
319 * We get the RTP/RTCP packets and stuff them into the session manager. From
320 * there they are pushed into an SSRC demuxer that splits the stream based on
321 * SSRC. Each of the SSRC streams go into their own jitterbuffer (managed with
322 * the GstRtpBinStream above).
324 struct _GstRtpBinSession
330 /* the session element */
332 /* the SSRC demuxer */
334 gulong demux_newpad_sig;
338 /* list of GstRtpBinStream */
341 /* mapping of payload type to caps */
344 /* the pads of the session */
345 GstPad *recv_rtp_sink;
346 GstPad *recv_rtp_src;
347 GstPad *recv_rtcp_sink;
349 GstPad *send_rtp_sink;
350 GstPad *send_rtp_src;
351 GstPad *send_rtcp_src;
354 /* Manages the RTP streams that come from one client and should therefore be
357 struct _GstRtpBinClient
359 /* the common CNAME for the streams */
370 /* find a session with the given id. Must be called with RTP_BIN_LOCK */
371 static GstRtpBinSession *
372 find_session_by_id (GstRtpBin * rtpbin, gint id)
376 for (walk = rtpbin->sessions; walk; walk = g_slist_next (walk)) {
377 GstRtpBinSession *sess = (GstRtpBinSession *) walk->data;
386 on_new_ssrc (GstElement * session, guint32 ssrc, GstRtpBinSession * sess)
388 g_signal_emit (sess->bin, gst_rtp_bin_signals[SIGNAL_ON_NEW_SSRC], 0,
393 on_ssrc_collision (GstElement * session, guint32 ssrc, GstRtpBinSession * sess)
395 g_signal_emit (sess->bin, gst_rtp_bin_signals[SIGNAL_ON_SSRC_COLLISION], 0,
400 on_ssrc_validated (GstElement * session, guint32 ssrc, GstRtpBinSession * sess)
402 g_signal_emit (sess->bin, gst_rtp_bin_signals[SIGNAL_ON_SSRC_VALIDATED], 0,
407 on_ssrc_active (GstElement * session, guint32 ssrc, GstRtpBinSession * sess)
409 g_signal_emit (sess->bin, gst_rtp_bin_signals[SIGNAL_ON_SSRC_ACTIVE], 0,
414 on_ssrc_sdes (GstElement * session, guint32 ssrc, GstRtpBinSession * sess)
416 g_signal_emit (sess->bin, gst_rtp_bin_signals[SIGNAL_ON_SSRC_SDES], 0,
421 on_bye_ssrc (GstElement * session, guint32 ssrc, GstRtpBinSession * sess)
423 g_signal_emit (sess->bin, gst_rtp_bin_signals[SIGNAL_ON_BYE_SSRC], 0,
428 on_bye_timeout (GstElement * session, guint32 ssrc, GstRtpBinSession * sess)
430 g_signal_emit (sess->bin, gst_rtp_bin_signals[SIGNAL_ON_BYE_TIMEOUT], 0,
435 on_timeout (GstElement * session, guint32 ssrc, GstRtpBinSession * sess)
437 g_signal_emit (sess->bin, gst_rtp_bin_signals[SIGNAL_ON_TIMEOUT], 0,
441 /* create a session with the given id. Must be called with RTP_BIN_LOCK */
442 static GstRtpBinSession *
443 create_session (GstRtpBin * rtpbin, gint id)
445 GstRtpBinSession *sess;
446 GstElement *session, *demux;
449 if (!(session = gst_element_factory_make ("gstrtpsession", NULL)))
452 if (!(demux = gst_element_factory_make ("gstrtpssrcdemux", NULL)))
455 sess = g_new0 (GstRtpBinSession, 1);
456 sess->lock = g_mutex_new ();
459 sess->session = session;
461 sess->ptmap = g_hash_table_new (NULL, NULL);
462 rtpbin->sessions = g_slist_prepend (rtpbin->sessions, sess);
464 /* set NTP base or new session */
465 g_object_set (session, "ntp-ns-base", rtpbin->priv->ntp_ns_base, NULL);
466 /* configure SDES items */
467 GST_OBJECT_LOCK (rtpbin);
468 for (i = GST_RTCP_SDES_CNAME; i < GST_RTCP_SDES_PRIV; i++) {
469 g_object_set (session, sdes_type_to_name (i), rtpbin->sdes[i], NULL);
471 GST_OBJECT_UNLOCK (rtpbin);
473 /* provide clock_rate to the session manager when needed */
474 g_signal_connect (session, "request-pt-map",
475 (GCallback) pt_map_requested, sess);
477 g_signal_connect (sess->session, "on-new-ssrc",
478 (GCallback) on_new_ssrc, sess);
479 g_signal_connect (sess->session, "on-ssrc-collision",
480 (GCallback) on_ssrc_collision, sess);
481 g_signal_connect (sess->session, "on-ssrc-validated",
482 (GCallback) on_ssrc_validated, sess);
483 g_signal_connect (sess->session, "on-ssrc-active",
484 (GCallback) on_ssrc_active, sess);
485 g_signal_connect (sess->session, "on-ssrc-sdes",
486 (GCallback) on_ssrc_sdes, sess);
487 g_signal_connect (sess->session, "on-bye-ssrc",
488 (GCallback) on_bye_ssrc, sess);
489 g_signal_connect (sess->session, "on-bye-timeout",
490 (GCallback) on_bye_timeout, sess);
491 g_signal_connect (sess->session, "on-timeout", (GCallback) on_timeout, sess);
493 /* FIXME, change state only to what's needed */
494 gst_bin_add (GST_BIN_CAST (rtpbin), session);
495 gst_element_set_state (session, GST_STATE_PLAYING);
496 gst_bin_add (GST_BIN_CAST (rtpbin), demux);
497 gst_element_set_state (demux, GST_STATE_PLAYING);
504 g_warning ("gstrtpbin: could not create gstrtpsession element");
509 gst_object_unref (session);
510 g_warning ("gstrtpbin: could not create gstrtpssrcdemux element");
516 free_session (GstRtpBinSession * sess)
522 gst_element_set_state (sess->session, GST_STATE_NULL);
523 gst_element_set_state (sess->demux, GST_STATE_NULL);
525 gst_bin_remove (GST_BIN_CAST (bin), sess->session);
526 gst_bin_remove (GST_BIN_CAST (bin), sess->demux);
528 g_slist_foreach (sess->streams, (GFunc) free_stream, NULL);
529 g_slist_free (sess->streams);
531 g_mutex_free (sess->lock);
532 g_hash_table_destroy (sess->ptmap);
534 bin->sessions = g_slist_remove (bin->sessions, sess);
540 static GstRtpBinStream *
541 find_stream_by_ssrc (GstRtpBinSession * session, guint32 ssrc)
545 for (walk = session->streams; walk; walk = g_slist_next (walk)) {
546 GstRtpBinStream *stream = (GstRtpBinStream *) walk->data;
548 if (stream->ssrc == ssrc)
555 /* get the payload type caps for the specific payload @pt in @session */
557 get_pt_map (GstRtpBinSession * session, guint pt)
559 GstCaps *caps = NULL;
562 GValue args[3] = { {0}, {0}, {0} };
564 GST_DEBUG ("searching pt %d in cache", pt);
566 GST_RTP_SESSION_LOCK (session);
568 /* first look in the cache */
569 caps = g_hash_table_lookup (session->ptmap, GINT_TO_POINTER (pt));
575 GST_DEBUG ("emiting signal for pt %d in session %d", pt, session->id);
577 /* not in cache, send signal to request caps */
578 g_value_init (&args[0], GST_TYPE_ELEMENT);
579 g_value_set_object (&args[0], bin);
580 g_value_init (&args[1], G_TYPE_UINT);
581 g_value_set_uint (&args[1], session->id);
582 g_value_init (&args[2], G_TYPE_UINT);
583 g_value_set_uint (&args[2], pt);
585 g_value_init (&ret, GST_TYPE_CAPS);
586 g_value_set_boxed (&ret, NULL);
588 g_signal_emitv (args, gst_rtp_bin_signals[SIGNAL_REQUEST_PT_MAP], 0, &ret);
590 caps = (GstCaps *) g_value_get_boxed (&ret);
594 GST_DEBUG ("caching pt %d as %" GST_PTR_FORMAT, pt, caps);
597 g_hash_table_insert (session->ptmap, GINT_TO_POINTER (pt), caps);
601 GST_RTP_SESSION_UNLOCK (session);
608 GST_RTP_SESSION_UNLOCK (session);
609 GST_DEBUG ("no pt map could be obtained");
615 return_true (gpointer key, gpointer value, gpointer user_data)
621 gst_rtp_bin_clear_pt_map (GstRtpBin * bin)
623 GSList *sessions, *streams;
625 GST_RTP_BIN_LOCK (bin);
626 GST_DEBUG_OBJECT (bin, "clearing pt map");
627 for (sessions = bin->sessions; sessions; sessions = g_slist_next (sessions)) {
628 GstRtpBinSession *session = (GstRtpBinSession *) sessions->data;
630 GST_DEBUG_OBJECT (bin, "clearing session %p", session);
631 g_signal_emit_by_name (session->session, "clear-pt-map", NULL);
633 GST_RTP_SESSION_LOCK (session);
634 g_hash_table_foreach_remove (session->ptmap, return_true, NULL);
636 for (streams = session->streams; streams; streams = g_slist_next (streams)) {
637 GstRtpBinStream *stream = (GstRtpBinStream *) streams->data;
639 GST_DEBUG_OBJECT (bin, "clearing stream %p", stream);
640 g_signal_emit_by_name (stream->buffer, "clear-pt-map", NULL);
641 g_signal_emit_by_name (stream->demux, "clear-pt-map", NULL);
643 GST_RTP_SESSION_UNLOCK (session);
645 GST_RTP_BIN_UNLOCK (bin);
648 static GstRtpBinClient *
649 get_client (GstRtpBin * bin, guint8 len, guint8 * data, gboolean * created)
651 GstRtpBinClient *result = NULL;
654 for (walk = bin->clients; walk; walk = g_slist_next (walk)) {
655 GstRtpBinClient *client = (GstRtpBinClient *) walk->data;
657 if (len != client->cname_len)
660 if (!strncmp ((gchar *) data, client->cname, client->cname_len)) {
661 GST_DEBUG_OBJECT (bin, "found existing client %p with CNAME %s", client,
668 /* nothing found, create one */
669 if (result == NULL) {
670 result = g_new0 (GstRtpBinClient, 1);
671 result->cname = g_strndup ((gchar *) data, len);
672 result->cname_len = len;
673 result->min_delta = G_MAXINT64;
674 bin->clients = g_slist_prepend (bin->clients, result);
675 GST_DEBUG_OBJECT (bin, "created new client %p with CNAME %s", result,
682 free_client (GstRtpBinClient * client)
684 g_free (client->cname);
688 /* associate a stream to the given CNAME. This will make sure all streams for
689 * that CNAME are synchronized together. */
691 gst_rtp_bin_associate (GstRtpBin * bin, GstRtpBinStream * stream, guint8 len,
694 GstRtpBinClient *client;
698 /* first find or create the CNAME */
699 client = get_client (bin, len, data, &created);
701 /* find stream in the client */
702 for (walk = client->streams; walk; walk = g_slist_next (walk)) {
703 GstRtpBinStream *ostream = (GstRtpBinStream *) walk->data;
705 if (ostream == stream)
708 /* not found, add it to the list */
710 GST_DEBUG_OBJECT (bin,
711 "new association of SSRC %08x with client %p with CNAME %s",
712 stream->ssrc, client, client->cname);
713 client->streams = g_slist_prepend (client->streams, stream);
716 GST_DEBUG_OBJECT (bin,
717 "found association of SSRC %08x with client %p with CNAME %s",
718 stream->ssrc, client, client->cname);
721 /* we can only continue if we know the local clock-base and clock-rate */
722 if (stream->clock_base == -1)
724 if (stream->clock_rate <= 0)
727 /* map last RTP time to local timeline using our clock-base */
728 stream->local_rtp = stream->last_extrtptime - stream->clock_base;
730 GST_DEBUG_OBJECT (bin,
731 "base %" G_GUINT64_FORMAT ", extrtptime %" G_GUINT64_FORMAT
732 ", local RTP %" G_GUINT64_FORMAT ", clock-rate %d", stream->clock_base,
733 stream->last_extrtptime, stream->local_rtp, stream->clock_rate);
735 /* calculate local NTP time in gstreamer timestamp */
737 gst_util_uint64_scale_int (stream->local_rtp, GST_SECOND,
739 /* calculate delta between server and receiver */
740 stream->unix_delta = stream->last_unix - stream->local_unix;
742 GST_DEBUG_OBJECT (bin,
743 "local UNIX %" G_GUINT64_FORMAT ", remote UNIX %" G_GUINT64_FORMAT
744 ", delta %" G_GINT64_FORMAT, stream->local_unix, stream->last_unix,
747 /* recalc inter stream playout offset, but only if there are more than one
749 if (client->nstreams > 1) {
752 /* calculate the min of all deltas */
754 for (walk = client->streams; walk; walk = g_slist_next (walk)) {
755 GstRtpBinStream *ostream = (GstRtpBinStream *) walk->data;
757 if (ostream->unix_delta < min)
758 min = ostream->unix_delta;
761 GST_DEBUG_OBJECT (bin, "client %p min delta %" G_GINT64_FORMAT, client,
764 /* calculate offsets for each stream */
765 for (walk = client->streams; walk; walk = g_slist_next (walk)) {
766 GstRtpBinStream *ostream = (GstRtpBinStream *) walk->data;
768 ostream->ts_offset = ostream->unix_delta - min;
770 /* delta changed, see how much */
771 if (ostream->prev_ts_offset != ostream->ts_offset) {
774 if (ostream->prev_ts_offset > ostream->ts_offset)
775 diff = ostream->prev_ts_offset - ostream->ts_offset;
777 diff = ostream->ts_offset - ostream->prev_ts_offset;
779 /* only change diff when it changed more than 1 millisecond. This
780 * compensates for rounding errors in NTP to RTP timestamp
782 if (diff > GST_MSECOND)
783 g_object_set (ostream->buffer, "ts-offset", ostream->ts_offset, NULL);
785 ostream->prev_ts_offset = ostream->ts_offset;
787 GST_DEBUG_OBJECT (bin, "stream SSRC %08x, delta %" G_GINT64_FORMAT,
788 ostream->ssrc, ostream->ts_offset);
795 GST_WARNING_OBJECT (bin, "we have no clock-base");
800 GST_WARNING_OBJECT (bin, "we have no clock-rate");
805 #define GST_RTCP_BUFFER_FOR_PACKETS(b,buffer,packet) \
806 for ((b) = gst_rtcp_buffer_get_first_packet ((buffer), (packet)); (b); \
807 (b) = gst_rtcp_packet_move_to_next ((packet)))
809 #define GST_RTCP_SDES_FOR_ITEMS(b,packet) \
810 for ((b) = gst_rtcp_packet_sdes_first_item ((packet)); (b); \
811 (b) = gst_rtcp_packet_sdes_next_item ((packet)))
813 #define GST_RTCP_SDES_FOR_ENTRIES(b,packet) \
814 for ((b) = gst_rtcp_packet_sdes_first_entry ((packet)); (b); \
815 (b) = gst_rtcp_packet_sdes_next_entry ((packet)))
818 gst_rtp_bin_sync_chain (GstPad * pad, GstBuffer * buffer)
820 GstFlowReturn ret = GST_FLOW_OK;
821 GstRtpBinStream *stream;
823 GstRTCPPacket packet;
827 gboolean have_sr, have_sdes;
830 stream = gst_pad_get_element_private (pad);
833 GST_DEBUG_OBJECT (bin, "received sync packet");
835 if (!gst_rtcp_buffer_validate (buffer))
840 GST_RTCP_BUFFER_FOR_PACKETS (more, buffer, &packet) {
841 /* first packet must be SR or RR or else the validate would have failed */
842 switch (gst_rtcp_packet_get_type (&packet)) {
843 case GST_RTCP_TYPE_SR:
844 /* only parse first. There is only supposed to be one SR in the packet
845 * but we will deal with malformed packets gracefully */
848 /* get NTP and RTP times */
849 gst_rtcp_packet_sr_get_sender_info (&packet, &ssrc, &ntptime, &rtptime,
852 GST_DEBUG_OBJECT (bin, "received sync packet from SSRC %08x", ssrc);
853 /* ignore SR that is not ours */
854 if (ssrc != stream->ssrc)
859 /* store values in the stream */
860 stream->have_sync = TRUE;
861 stream->last_unix = gst_rtcp_ntp_to_unix (ntptime);
862 /* use extended timestamp */
863 gst_rtp_buffer_ext_timestamp (&stream->last_extrtptime, rtptime);
865 case GST_RTCP_TYPE_SDES:
867 gboolean more_items, more_entries;
869 /* only deal with first SDES, there is only supposed to be one SDES in
870 * the RTCP packet but we deal with bad packets gracefully. Also bail
871 * out if we have not seen an SR item yet. */
872 if (have_sdes || !have_sr)
875 GST_RTCP_SDES_FOR_ITEMS (more_items, &packet) {
876 /* skip items that are not about the SSRC of the sender */
877 if (gst_rtcp_packet_sdes_get_ssrc (&packet) != ssrc)
880 /* find the CNAME entry */
881 GST_RTCP_SDES_FOR_ENTRIES (more_entries, &packet) {
882 GstRTCPSDESType type;
886 gst_rtcp_packet_sdes_get_entry (&packet, &type, &len, &data);
888 if (type == GST_RTCP_SDES_CNAME) {
889 stream->clock_base = GST_BUFFER_OFFSET (buffer);
890 /* associate the stream to CNAME */
891 gst_rtp_bin_associate (bin, stream, len, data);
899 /* we can ignore these packets */
904 gst_buffer_unref (buffer);
911 /* this is fatal and should be filtered earlier */
912 GST_ELEMENT_ERROR (bin, STREAM, DECODE, (NULL),
913 ("invalid RTCP packet received"));
914 gst_buffer_unref (buffer);
915 return GST_FLOW_ERROR;
919 /* create a new stream with @ssrc in @session. Must be called with
920 * RTP_SESSION_LOCK. */
921 static GstRtpBinStream *
922 create_stream (GstRtpBinSession * session, guint32 ssrc)
924 GstElement *buffer, *demux;
925 GstRtpBinStream *stream;
926 GstPadTemplate *templ;
929 if (!(buffer = gst_element_factory_make ("gstrtpjitterbuffer", NULL)))
930 goto no_jitterbuffer;
932 if (!(demux = gst_element_factory_make ("gstrtpptdemux", NULL)))
935 stream = g_new0 (GstRtpBinStream, 1);
937 stream->bin = session->bin;
938 stream->session = session;
939 stream->buffer = buffer;
940 stream->demux = demux;
941 stream->last_extrtptime = -1;
942 stream->have_sync = FALSE;
943 session->streams = g_slist_prepend (session->streams, stream);
945 /* make an internal sinkpad for RTCP sync packets. Take ownership of the
946 * pad. We will link this pad later. */
947 padname = g_strdup_printf ("sync_%d", ssrc);
948 templ = gst_static_pad_template_get (&rtpbin_sync_sink_template);
949 stream->sync_pad = gst_pad_new_from_template (templ, padname);
950 gst_object_unref (templ);
952 gst_object_ref (stream->sync_pad);
953 gst_object_sink (stream->sync_pad);
954 gst_pad_set_element_private (stream->sync_pad, stream);
955 gst_pad_set_chain_function (stream->sync_pad, gst_rtp_bin_sync_chain);
956 gst_pad_set_active (stream->sync_pad, TRUE);
958 /* provide clock_rate to the jitterbuffer when needed */
959 g_signal_connect (buffer, "request-pt-map",
960 (GCallback) pt_map_requested, session);
962 /* configure latency */
963 g_object_set (buffer, "latency", session->bin->latency, NULL);
965 gst_bin_add (GST_BIN_CAST (session->bin), buffer);
966 gst_element_set_state (buffer, GST_STATE_PLAYING);
967 gst_bin_add (GST_BIN_CAST (session->bin), demux);
968 gst_element_set_state (demux, GST_STATE_PLAYING);
971 gst_element_link (buffer, demux);
978 g_warning ("gstrtpbin: could not create gstrtpjitterbuffer element");
983 gst_object_unref (buffer);
984 g_warning ("gstrtpbin: could not create gstrtpptdemux element");
990 free_stream (GstRtpBinStream * stream)
992 GstRtpBinSession *session;
994 session = stream->session;
996 gst_element_set_state (stream->buffer, GST_STATE_NULL);
997 gst_element_set_state (stream->demux, GST_STATE_NULL);
999 gst_bin_remove (GST_BIN_CAST (session->bin), stream->buffer);
1000 gst_bin_remove (GST_BIN_CAST (session->bin), stream->demux);
1002 gst_object_unref (stream->sync_pad);
1004 session->streams = g_slist_remove (session->streams, stream);
1009 /* GObject vmethods */
1010 static void gst_rtp_bin_dispose (GObject * object);
1011 static void gst_rtp_bin_finalize (GObject * object);
1012 static void gst_rtp_bin_set_property (GObject * object, guint prop_id,
1013 const GValue * value, GParamSpec * pspec);
1014 static void gst_rtp_bin_get_property (GObject * object, guint prop_id,
1015 GValue * value, GParamSpec * pspec);
1017 /* GstElement vmethods */
1018 static GstClock *gst_rtp_bin_provide_clock (GstElement * element);
1019 static GstStateChangeReturn gst_rtp_bin_change_state (GstElement * element,
1020 GstStateChange transition);
1021 static GstPad *gst_rtp_bin_request_new_pad (GstElement * element,
1022 GstPadTemplate * templ, const gchar * name);
1023 static void gst_rtp_bin_release_pad (GstElement * element, GstPad * pad);
1024 static void gst_rtp_bin_handle_message (GstBin * bin, GstMessage * message);
1025 static void gst_rtp_bin_clear_pt_map (GstRtpBin * bin);
1027 GST_BOILERPLATE (GstRtpBin, gst_rtp_bin, GstBin, GST_TYPE_BIN);
1030 gst_rtp_bin_base_init (gpointer klass)
1032 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
1035 gst_element_class_add_pad_template (element_class,
1036 gst_static_pad_template_get (&rtpbin_recv_rtp_sink_template));
1037 gst_element_class_add_pad_template (element_class,
1038 gst_static_pad_template_get (&rtpbin_recv_rtcp_sink_template));
1039 gst_element_class_add_pad_template (element_class,
1040 gst_static_pad_template_get (&rtpbin_send_rtp_sink_template));
1043 gst_element_class_add_pad_template (element_class,
1044 gst_static_pad_template_get (&rtpbin_recv_rtp_src_template));
1045 gst_element_class_add_pad_template (element_class,
1046 gst_static_pad_template_get (&rtpbin_send_rtcp_src_template));
1047 gst_element_class_add_pad_template (element_class,
1048 gst_static_pad_template_get (&rtpbin_send_rtp_src_template));
1050 gst_element_class_set_details (element_class, &rtpbin_details);
1054 gst_rtp_bin_class_init (GstRtpBinClass * klass)
1056 GObjectClass *gobject_class;
1057 GstElementClass *gstelement_class;
1058 GstBinClass *gstbin_class;
1060 gobject_class = (GObjectClass *) klass;
1061 gstelement_class = (GstElementClass *) klass;
1062 gstbin_class = (GstBinClass *) klass;
1064 g_type_class_add_private (klass, sizeof (GstRtpBinPrivate));
1066 gobject_class->dispose = gst_rtp_bin_dispose;
1067 gobject_class->finalize = gst_rtp_bin_finalize;
1068 gobject_class->set_property = gst_rtp_bin_set_property;
1069 gobject_class->get_property = gst_rtp_bin_get_property;
1071 g_object_class_install_property (gobject_class, PROP_LATENCY,
1072 g_param_spec_uint ("latency", "Buffer latency in ms",
1073 "Default amount of ms to buffer in the jitterbuffers", 0,
1074 G_MAXUINT, DEFAULT_LATENCY_MS, G_PARAM_READWRITE));
1077 * GstRtpBin::request-pt-map:
1078 * @rtpbin: the object which received the signal
1079 * @session: the session
1082 * Request the payload type as #GstCaps for @pt in @session.
1084 gst_rtp_bin_signals[SIGNAL_REQUEST_PT_MAP] =
1085 g_signal_new ("request-pt-map", G_TYPE_FROM_CLASS (klass),
1086 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRtpBinClass, request_pt_map),
1087 NULL, NULL, gst_rtp_bin_marshal_BOXED__UINT_UINT, GST_TYPE_CAPS, 2,
1088 G_TYPE_UINT, G_TYPE_UINT);
1090 * GstRtpBin::clear-pt-map:
1091 * @rtpbin: the object which received the signal
1093 * Clear all previously cached pt-mapping obtained with
1094 * GstRtpBin::request-pt-map.
1096 gst_rtp_bin_signals[SIGNAL_CLEAR_PT_MAP] =
1097 g_signal_new ("clear-pt-map", G_TYPE_FROM_CLASS (klass),
1098 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstRtpBinClass,
1099 clear_pt_map), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE,
1103 * GstRtpBin::on-new-ssrc:
1104 * @rtpbin: the object which received the signal
1105 * @session: the session
1108 * Notify of a new SSRC that entered @session.
1110 gst_rtp_bin_signals[SIGNAL_ON_NEW_SSRC] =
1111 g_signal_new ("on-new-ssrc", G_TYPE_FROM_CLASS (klass),
1112 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRtpBinClass, on_new_ssrc),
1113 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
1114 G_TYPE_UINT, G_TYPE_UINT);
1116 * GstRtpBin::on-ssrc-collision:
1117 * @rtpbin: the object which received the signal
1118 * @session: the session
1121 * Notify when we have an SSRC collision
1123 gst_rtp_bin_signals[SIGNAL_ON_SSRC_COLLISION] =
1124 g_signal_new ("on-ssrc-collision", G_TYPE_FROM_CLASS (klass),
1125 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRtpBinClass, on_ssrc_collision),
1126 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
1127 G_TYPE_UINT, G_TYPE_UINT);
1129 * GstRtpBin::on-ssrc-validated:
1130 * @rtpbin: the object which received the signal
1131 * @session: the session
1134 * Notify of a new SSRC that became validated.
1136 gst_rtp_bin_signals[SIGNAL_ON_SSRC_VALIDATED] =
1137 g_signal_new ("on-ssrc-validated", G_TYPE_FROM_CLASS (klass),
1138 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRtpBinClass, on_ssrc_validated),
1139 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
1140 G_TYPE_UINT, G_TYPE_UINT);
1142 * GstRtpBin::on-ssrc-active:
1143 * @rtpbin: the object which received the signal
1144 * @session: the session
1147 * Notify of a SSRC that is active, i.e., sending RTCP.
1149 gst_rtp_bin_signals[SIGNAL_ON_SSRC_ACTIVE] =
1150 g_signal_new ("on-ssrc-active", G_TYPE_FROM_CLASS (klass),
1151 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRtpBinClass, on_ssrc_active),
1152 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
1153 G_TYPE_UINT, G_TYPE_UINT);
1155 * GstRtpBin::on-ssrc-sdes:
1156 * @rtpbin: the object which received the signal
1157 * @session: the session
1160 * Notify of a SSRC that is active, i.e., sending RTCP.
1162 gst_rtp_bin_signals[SIGNAL_ON_SSRC_SDES] =
1163 g_signal_new ("on-ssrc-sdes", G_TYPE_FROM_CLASS (klass),
1164 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRtpBinClass, on_ssrc_sdes),
1165 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
1166 G_TYPE_UINT, G_TYPE_UINT);
1169 * GstRtpBin::on-bye-ssrc:
1170 * @rtpbin: the object which received the signal
1171 * @session: the session
1174 * Notify of an SSRC that became inactive because of a BYE packet.
1176 gst_rtp_bin_signals[SIGNAL_ON_BYE_SSRC] =
1177 g_signal_new ("on-bye-ssrc", G_TYPE_FROM_CLASS (klass),
1178 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRtpBinClass, on_bye_ssrc),
1179 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
1180 G_TYPE_UINT, G_TYPE_UINT);
1182 * GstRtpBin::on-bye-timeout:
1183 * @rtpbin: the object which received the signal
1184 * @session: the session
1187 * Notify of an SSRC that has timed out because of BYE
1189 gst_rtp_bin_signals[SIGNAL_ON_BYE_TIMEOUT] =
1190 g_signal_new ("on-bye-timeout", G_TYPE_FROM_CLASS (klass),
1191 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRtpBinClass, on_bye_timeout),
1192 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
1193 G_TYPE_UINT, G_TYPE_UINT);
1195 * GstRtpBin::on-timeout:
1196 * @rtpbin: the object which received the signal
1197 * @session: the session
1200 * Notify of an SSRC that has timed out
1202 gst_rtp_bin_signals[SIGNAL_ON_TIMEOUT] =
1203 g_signal_new ("on-timeout", G_TYPE_FROM_CLASS (klass),
1204 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRtpBinClass, on_timeout),
1205 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_UINT, G_TYPE_NONE, 2,
1206 G_TYPE_UINT, G_TYPE_UINT);
1208 g_object_class_install_property (gobject_class, PROP_SDES_CNAME,
1209 g_param_spec_string ("sdes-cname", "SDES CNAME",
1210 "The CNAME to put in SDES messages of this session",
1211 DEFAULT_SDES_CNAME, G_PARAM_READWRITE));
1213 g_object_class_install_property (gobject_class, PROP_SDES_NAME,
1214 g_param_spec_string ("sdes-name", "SDES NAME",
1215 "The NAME to put in SDES messages of this session",
1216 DEFAULT_SDES_NAME, G_PARAM_READWRITE));
1218 g_object_class_install_property (gobject_class, PROP_SDES_EMAIL,
1219 g_param_spec_string ("sdes-email", "SDES EMAIL",
1220 "The EMAIL to put in SDES messages of this session",
1221 DEFAULT_SDES_EMAIL, G_PARAM_READWRITE));
1223 g_object_class_install_property (gobject_class, PROP_SDES_PHONE,
1224 g_param_spec_string ("sdes-phone", "SDES PHONE",
1225 "The PHONE to put in SDES messages of this session",
1226 DEFAULT_SDES_PHONE, G_PARAM_READWRITE));
1228 g_object_class_install_property (gobject_class, PROP_SDES_LOCATION,
1229 g_param_spec_string ("sdes-location", "SDES LOCATION",
1230 "The LOCATION to put in SDES messages of this session",
1231 DEFAULT_SDES_LOCATION, G_PARAM_READWRITE));
1233 g_object_class_install_property (gobject_class, PROP_SDES_TOOL,
1234 g_param_spec_string ("sdes-tool", "SDES TOOL",
1235 "The TOOL to put in SDES messages of this session",
1236 DEFAULT_SDES_TOOL, G_PARAM_READWRITE));
1238 g_object_class_install_property (gobject_class, PROP_SDES_NOTE,
1239 g_param_spec_string ("sdes-note", "SDES NOTE",
1240 "The NOTE to put in SDES messages of this session",
1241 DEFAULT_SDES_NOTE, G_PARAM_READWRITE));
1243 gstelement_class->provide_clock =
1244 GST_DEBUG_FUNCPTR (gst_rtp_bin_provide_clock);
1245 gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_rtp_bin_change_state);
1246 gstelement_class->request_new_pad =
1247 GST_DEBUG_FUNCPTR (gst_rtp_bin_request_new_pad);
1248 gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_rtp_bin_release_pad);
1250 gstbin_class->handle_message = GST_DEBUG_FUNCPTR (gst_rtp_bin_handle_message);
1252 klass->clear_pt_map = GST_DEBUG_FUNCPTR (gst_rtp_bin_clear_pt_map);
1254 GST_DEBUG_CATEGORY_INIT (gst_rtp_bin_debug, "rtpbin", 0, "RTP bin");
1258 gst_rtp_bin_init (GstRtpBin * rtpbin, GstRtpBinClass * klass)
1262 rtpbin->priv = GST_RTP_BIN_GET_PRIVATE (rtpbin);
1263 rtpbin->priv->bin_lock = g_mutex_new ();
1264 rtpbin->provided_clock = gst_system_clock_obtain ();
1265 rtpbin->latency = DEFAULT_LATENCY_MS;
1267 /* some default SDES entries */
1268 str = g_strdup_printf ("%s@%s", g_get_user_name (), g_get_host_name ());
1269 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_CNAME, str);
1272 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_NAME, g_get_real_name ());
1273 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_TOOL, "GStreamer");
1277 gst_rtp_bin_dispose (GObject * object)
1281 rtpbin = GST_RTP_BIN (object);
1283 g_slist_foreach (rtpbin->sessions, (GFunc) free_session, NULL);
1284 g_slist_free (rtpbin->sessions);
1285 rtpbin->sessions = NULL;
1286 g_slist_foreach (rtpbin->clients, (GFunc) free_client, NULL);
1287 g_slist_free (rtpbin->clients);
1288 rtpbin->clients = NULL;
1290 G_OBJECT_CLASS (parent_class)->dispose (object);
1294 gst_rtp_bin_finalize (GObject * object)
1299 rtpbin = GST_RTP_BIN (object);
1301 for (i = 0; i < 9; i++)
1302 g_free (rtpbin->sdes[i]);
1304 g_mutex_free (rtpbin->priv->bin_lock);
1305 gst_object_unref (rtpbin->provided_clock);
1307 G_OBJECT_CLASS (parent_class)->finalize (object);
1310 static const gchar *
1311 sdes_type_to_name (GstRTCPSDESType type)
1313 const gchar *result;
1316 case GST_RTCP_SDES_CNAME:
1317 result = "sdes-cname";
1319 case GST_RTCP_SDES_NAME:
1320 result = "sdes-name";
1322 case GST_RTCP_SDES_EMAIL:
1323 result = "sdes-email";
1325 case GST_RTCP_SDES_PHONE:
1326 result = "sdes-phone";
1328 case GST_RTCP_SDES_LOC:
1329 result = "sdes-location";
1331 case GST_RTCP_SDES_TOOL:
1332 result = "sdes-tool";
1334 case GST_RTCP_SDES_NOTE:
1335 result = "sdes-note";
1337 case GST_RTCP_SDES_PRIV:
1338 result = "sdes-priv";
1348 gst_rtp_bin_set_sdes_string (GstRtpBin * bin, GstRTCPSDESType type,
1354 if (type < 0 || type > 8)
1357 GST_OBJECT_LOCK (bin);
1358 g_free (bin->sdes[type]);
1359 bin->sdes[type] = g_strdup (data);
1360 name = sdes_type_to_name (type);
1361 /* store in all sessions */
1362 for (item = bin->sessions; item; item = g_slist_next (item))
1363 g_object_set (item->data, name, bin->sdes[type], NULL);
1364 GST_OBJECT_UNLOCK (bin);
1368 gst_rtp_bin_get_sdes_string (GstRtpBin * bin, GstRTCPSDESType type)
1372 if (type < 0 || type > 8)
1375 GST_OBJECT_LOCK (bin);
1376 result = g_strdup (bin->sdes[type]);
1377 GST_OBJECT_UNLOCK (bin);
1383 gst_rtp_bin_set_property (GObject * object, guint prop_id,
1384 const GValue * value, GParamSpec * pspec)
1388 rtpbin = GST_RTP_BIN (object);
1392 GST_RTP_BIN_LOCK (rtpbin);
1393 rtpbin->latency = g_value_get_uint (value);
1394 GST_RTP_BIN_UNLOCK (rtpbin);
1396 case PROP_SDES_CNAME:
1397 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_CNAME,
1398 g_value_get_string (value));
1400 case PROP_SDES_NAME:
1401 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_NAME,
1402 g_value_get_string (value));
1404 case PROP_SDES_EMAIL:
1405 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_EMAIL,
1406 g_value_get_string (value));
1408 case PROP_SDES_PHONE:
1409 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_PHONE,
1410 g_value_get_string (value));
1412 case PROP_SDES_LOCATION:
1413 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_LOC,
1414 g_value_get_string (value));
1416 case PROP_SDES_TOOL:
1417 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_TOOL,
1418 g_value_get_string (value));
1420 case PROP_SDES_NOTE:
1421 gst_rtp_bin_set_sdes_string (rtpbin, GST_RTCP_SDES_NOTE,
1422 g_value_get_string (value));
1425 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1431 gst_rtp_bin_get_property (GObject * object, guint prop_id,
1432 GValue * value, GParamSpec * pspec)
1436 rtpbin = GST_RTP_BIN (object);
1440 GST_RTP_BIN_LOCK (rtpbin);
1441 g_value_set_uint (value, rtpbin->latency);
1442 GST_RTP_BIN_UNLOCK (rtpbin);
1444 case PROP_SDES_CNAME:
1445 g_value_take_string (value, gst_rtp_bin_get_sdes_string (rtpbin,
1446 GST_RTCP_SDES_CNAME));
1448 case PROP_SDES_NAME:
1449 g_value_take_string (value, gst_rtp_bin_get_sdes_string (rtpbin,
1450 GST_RTCP_SDES_NAME));
1452 case PROP_SDES_EMAIL:
1453 g_value_take_string (value, gst_rtp_bin_get_sdes_string (rtpbin,
1454 GST_RTCP_SDES_EMAIL));
1456 case PROP_SDES_PHONE:
1457 g_value_take_string (value, gst_rtp_bin_get_sdes_string (rtpbin,
1458 GST_RTCP_SDES_PHONE));
1460 case PROP_SDES_LOCATION:
1461 g_value_take_string (value, gst_rtp_bin_get_sdes_string (rtpbin,
1462 GST_RTCP_SDES_LOC));
1464 case PROP_SDES_TOOL:
1465 g_value_take_string (value, gst_rtp_bin_get_sdes_string (rtpbin,
1466 GST_RTCP_SDES_TOOL));
1468 case PROP_SDES_NOTE:
1469 g_value_take_string (value, gst_rtp_bin_get_sdes_string (rtpbin,
1470 GST_RTCP_SDES_NOTE));
1473 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1479 gst_rtp_bin_provide_clock (GstElement * element)
1483 rtpbin = GST_RTP_BIN (element);
1485 return GST_CLOCK_CAST (gst_object_ref (rtpbin->provided_clock));
1489 gst_rtp_bin_handle_message (GstBin * bin, GstMessage * message)
1493 rtpbin = GST_RTP_BIN (bin);
1495 switch (GST_MESSAGE_TYPE (message)) {
1496 case GST_MESSAGE_ELEMENT:
1498 const GstStructure *s = gst_message_get_structure (message);
1500 /* we change the structure name and add the session ID to it */
1501 if (gst_structure_has_name (s, "GstRTPSessionSDES")) {
1504 /* find the session, the message source has it */
1505 for (walk = rtpbin->sessions; walk; walk = g_slist_next (walk)) {
1506 GstRtpBinSession *sess = (GstRtpBinSession *) walk->data;
1508 /* if we found the session, change message. else we exit the loop and
1509 * leave the message unchanged */
1510 if (GST_OBJECT_CAST (sess->session) == GST_MESSAGE_SRC (message)) {
1511 message = gst_message_make_writable (message);
1512 s = gst_message_get_structure (message);
1514 gst_structure_set_name ((GstStructure *) s, "GstRTPBinSDES");
1516 gst_structure_set ((GstStructure *) s, "session", G_TYPE_UINT,
1522 /* fallthrough to forward the modified message to the parent */
1526 GST_BIN_CLASS (parent_class)->handle_message (bin, message);
1533 calc_ntp_ns_base (GstRtpBin * bin)
1539 /* get the current time and convert it to NTP time in nanoseconds */
1540 g_get_current_time (¤t);
1541 now = GST_TIMEVAL_TO_TIME (current);
1542 now += (2208988800LL * GST_SECOND);
1544 GST_RTP_BIN_LOCK (bin);
1545 bin->priv->ntp_ns_base = now;
1546 for (walk = bin->sessions; walk; walk = g_slist_next (walk)) {
1547 GstRtpBinSession *session = (GstRtpBinSession *) walk->data;
1549 g_object_set (session->session, "ntp-ns-base", now, NULL);
1551 GST_RTP_BIN_UNLOCK (bin);
1556 static GstStateChangeReturn
1557 gst_rtp_bin_change_state (GstElement * element, GstStateChange transition)
1559 GstStateChangeReturn res;
1562 rtpbin = GST_RTP_BIN (element);
1564 switch (transition) {
1565 case GST_STATE_CHANGE_NULL_TO_READY:
1567 case GST_STATE_CHANGE_READY_TO_PAUSED:
1569 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
1570 calc_ntp_ns_base (rtpbin);
1576 res = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1578 switch (transition) {
1579 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
1581 case GST_STATE_CHANGE_PAUSED_TO_READY:
1583 case GST_STATE_CHANGE_READY_TO_NULL:
1591 /* a new pad (SSRC) was created in @session */
1593 new_payload_found (GstElement * element, guint pt, GstPad * pad,
1594 GstRtpBinStream * stream)
1597 GstElementClass *klass;
1598 GstPadTemplate *templ;
1602 rtpbin = stream->bin;
1604 GST_DEBUG ("new payload pad %d", pt);
1606 /* ghost the pad to the parent */
1607 klass = GST_ELEMENT_GET_CLASS (rtpbin);
1608 templ = gst_element_class_get_pad_template (klass, "recv_rtp_src_%d_%d_%d");
1609 padname = g_strdup_printf ("recv_rtp_src_%d_%u_%d",
1610 stream->session->id, stream->ssrc, pt);
1611 gpad = gst_ghost_pad_new_from_template (padname, pad, templ);
1614 gst_pad_set_caps (gpad, GST_PAD_CAPS (pad));
1615 gst_pad_set_active (gpad, TRUE);
1616 gst_element_add_pad (GST_ELEMENT_CAST (rtpbin), gpad);
1620 pt_map_requested (GstElement * element, guint pt, GstRtpBinSession * session)
1625 rtpbin = session->bin;
1627 GST_DEBUG_OBJECT (rtpbin, "payload map requested for pt %d in session %d", pt,
1630 caps = get_pt_map (session, pt);
1639 GST_DEBUG_OBJECT (rtpbin, "could not get caps");
1644 /* emited when caps changed for the session */
1646 caps_changed (GstPad * pad, GParamSpec * pspec, GstRtpBinSession * session)
1651 const GstStructure *s;
1655 g_object_get (pad, "caps", &caps, NULL);
1660 GST_DEBUG_OBJECT (bin, "got caps %" GST_PTR_FORMAT, caps);
1662 s = gst_caps_get_structure (caps, 0);
1664 /* get payload, finish when it's not there */
1665 if (!gst_structure_get_int (s, "payload", &payload))
1668 GST_RTP_SESSION_LOCK (session);
1669 GST_DEBUG_OBJECT (bin, "insert caps for payload %d", payload);
1670 g_hash_table_insert (session->ptmap, GINT_TO_POINTER (payload), caps);
1671 GST_RTP_SESSION_UNLOCK (session);
1674 /* a new pad (SSRC) was created in @session */
1676 new_ssrc_pad_found (GstElement * element, guint ssrc, GstPad * pad,
1677 GstRtpBinSession * session)
1679 GstRtpBinStream *stream;
1680 GstPad *sinkpad, *srcpad;
1684 GST_DEBUG_OBJECT (session->bin, "new SSRC pad %08x", ssrc);
1686 GST_RTP_SESSION_LOCK (session);
1688 /* create new stream */
1689 stream = create_stream (session, ssrc);
1693 /* get the caps of the pad, we need the clock-rate and base_time if any. */
1694 if ((caps = gst_pad_get_caps (pad))) {
1695 const GstStructure *s;
1698 GST_DEBUG_OBJECT (session->bin, "pad has caps %" GST_PTR_FORMAT, caps);
1700 s = gst_caps_get_structure (caps, 0);
1702 if (!gst_structure_get_int (s, "clock-rate", &stream->clock_rate))
1703 stream->clock_rate = -1;
1705 if (gst_structure_get_uint (s, "clock-base", &val))
1706 stream->clock_base = val;
1708 stream->clock_base = -1;
1711 /* get pad and link */
1712 GST_DEBUG_OBJECT (session->bin, "linking jitterbuffer");
1713 padname = g_strdup_printf ("src_%d", ssrc);
1714 srcpad = gst_element_get_pad (element, padname);
1716 sinkpad = gst_element_get_static_pad (stream->buffer, "sink");
1717 gst_pad_link (srcpad, sinkpad);
1718 gst_object_unref (sinkpad);
1720 /* get the RTCP sync pad */
1721 GST_DEBUG_OBJECT (session->bin, "linking sync pad");
1722 padname = g_strdup_printf ("rtcp_src_%d", ssrc);
1723 srcpad = gst_element_get_pad (element, padname);
1725 gst_pad_link (srcpad, stream->sync_pad);
1726 gst_object_unref (srcpad);
1728 /* connect to the new-pad signal of the payload demuxer, this will expose the
1729 * new pad by ghosting it. */
1730 stream->demux_newpad_sig = g_signal_connect (stream->demux,
1731 "new-payload-type", (GCallback) new_payload_found, stream);
1732 /* connect to the request-pt-map signal. This signal will be emited by the
1733 * demuxer so that it can apply a proper caps on the buffers for the
1735 stream->demux_ptreq_sig = g_signal_connect (stream->demux,
1736 "request-pt-map", (GCallback) pt_map_requested, session);
1738 GST_RTP_SESSION_UNLOCK (session);
1745 GST_RTP_SESSION_UNLOCK (session);
1746 GST_DEBUG_OBJECT (session->bin, "could not create stream");
1751 /* Create a pad for receiving RTP for the session in @name. Must be called with
1755 create_recv_rtp (GstRtpBin * rtpbin, GstPadTemplate * templ, const gchar * name)
1757 GstPad *result, *sinkdpad;
1759 GstRtpBinSession *session;
1760 GstPadLinkReturn lres;
1762 /* first get the session number */
1763 if (name == NULL || sscanf (name, "recv_rtp_sink_%d", &sessid) != 1)
1766 GST_DEBUG_OBJECT (rtpbin, "finding session %d", sessid);
1768 /* get or create session */
1769 session = find_session_by_id (rtpbin, sessid);
1771 GST_DEBUG_OBJECT (rtpbin, "creating session %d", sessid);
1772 /* create session now */
1773 session = create_session (rtpbin, sessid);
1774 if (session == NULL)
1778 /* check if pad was requested */
1779 if (session->recv_rtp_sink != NULL)
1782 GST_DEBUG_OBJECT (rtpbin, "getting RTP sink pad");
1783 /* get recv_rtp pad and store */
1784 session->recv_rtp_sink =
1785 gst_element_get_request_pad (session->session, "recv_rtp_sink");
1786 if (session->recv_rtp_sink == NULL)
1789 g_signal_connect (session->recv_rtp_sink, "notify::caps",
1790 (GCallback) caps_changed, session);
1792 GST_DEBUG_OBJECT (rtpbin, "getting RTP src pad");
1793 /* get srcpad, link to SSRCDemux */
1794 session->recv_rtp_src =
1795 gst_element_get_static_pad (session->session, "recv_rtp_src");
1796 if (session->recv_rtp_src == NULL)
1799 GST_DEBUG_OBJECT (rtpbin, "getting demuxer RTP sink pad");
1800 sinkdpad = gst_element_get_static_pad (session->demux, "sink");
1801 GST_DEBUG_OBJECT (rtpbin, "linking demuxer RTP sink pad");
1802 lres = gst_pad_link (session->recv_rtp_src, sinkdpad);
1803 gst_object_unref (sinkdpad);
1804 if (lres != GST_PAD_LINK_OK)
1807 /* connect to the new-ssrc-pad signal of the SSRC demuxer */
1808 session->demux_newpad_sig = g_signal_connect (session->demux,
1809 "new-ssrc-pad", (GCallback) new_ssrc_pad_found, session);
1811 GST_DEBUG_OBJECT (rtpbin, "ghosting session sink pad");
1813 gst_ghost_pad_new_from_template (name, session->recv_rtp_sink, templ);
1814 gst_pad_set_active (result, TRUE);
1815 gst_element_add_pad (GST_ELEMENT_CAST (rtpbin), result);
1822 g_warning ("gstrtpbin: invalid name given");
1827 /* create_session already warned */
1832 g_warning ("gstrtpbin: recv_rtp pad already requested for session %d",
1838 g_warning ("gstrtpbin: failed to get session pad");
1843 g_warning ("gstrtpbin: failed to link pads");
1848 /* Create a pad for receiving RTCP for the session in @name. Must be called with
1852 create_recv_rtcp (GstRtpBin * rtpbin, GstPadTemplate * templ,
1857 GstRtpBinSession *session;
1859 GstPadLinkReturn lres;
1861 /* first get the session number */
1862 if (name == NULL || sscanf (name, "recv_rtcp_sink_%d", &sessid) != 1)
1865 GST_DEBUG_OBJECT (rtpbin, "finding session %d", sessid);
1867 /* get or create the session */
1868 session = find_session_by_id (rtpbin, sessid);
1870 GST_DEBUG_OBJECT (rtpbin, "creating session %d", sessid);
1871 /* create session now */
1872 session = create_session (rtpbin, sessid);
1873 if (session == NULL)
1877 /* check if pad was requested */
1878 if (session->recv_rtcp_sink != NULL)
1881 /* get recv_rtp pad and store */
1882 GST_DEBUG_OBJECT (rtpbin, "getting RTCP sink pad");
1883 session->recv_rtcp_sink =
1884 gst_element_get_request_pad (session->session, "recv_rtcp_sink");
1885 if (session->recv_rtcp_sink == NULL)
1888 /* get srcpad, link to SSRCDemux */
1889 GST_DEBUG_OBJECT (rtpbin, "getting sync src pad");
1890 session->sync_src = gst_element_get_static_pad (session->session, "sync_src");
1891 if (session->sync_src == NULL)
1894 GST_DEBUG_OBJECT (rtpbin, "getting demuxer RTCP sink pad");
1895 sinkdpad = gst_element_get_static_pad (session->demux, "rtcp_sink");
1896 lres = gst_pad_link (session->sync_src, sinkdpad);
1897 gst_object_unref (sinkdpad);
1898 if (lres != GST_PAD_LINK_OK)
1902 gst_ghost_pad_new_from_template (name, session->recv_rtcp_sink, templ);
1903 gst_pad_set_active (result, TRUE);
1904 gst_element_add_pad (GST_ELEMENT_CAST (rtpbin), result);
1911 g_warning ("gstrtpbin: invalid name given");
1916 /* create_session already warned */
1921 g_warning ("gstrtpbin: recv_rtcp pad already requested for session %d",
1927 g_warning ("gstrtpbin: failed to get session pad");
1932 g_warning ("gstrtpbin: failed to link pads");
1937 /* Create a pad for sending RTP for the session in @name. Must be called with
1941 create_send_rtp (GstRtpBin * rtpbin, GstPadTemplate * templ, const gchar * name)
1943 GstPad *result, *srcghost;
1946 GstRtpBinSession *session;
1947 GstElementClass *klass;
1949 /* first get the session number */
1950 if (name == NULL || sscanf (name, "send_rtp_sink_%d", &sessid) != 1)
1953 /* get or create session */
1954 session = find_session_by_id (rtpbin, sessid);
1956 /* create session now */
1957 session = create_session (rtpbin, sessid);
1958 if (session == NULL)
1962 /* check if pad was requested */
1963 if (session->send_rtp_sink != NULL)
1966 /* get send_rtp pad and store */
1967 session->send_rtp_sink =
1968 gst_element_get_request_pad (session->session, "send_rtp_sink");
1969 if (session->send_rtp_sink == NULL)
1973 gst_ghost_pad_new_from_template (name, session->send_rtp_sink, templ);
1974 gst_pad_set_active (result, TRUE);
1975 gst_element_add_pad (GST_ELEMENT_CAST (rtpbin), result);
1978 session->send_rtp_src =
1979 gst_element_get_static_pad (session->session, "send_rtp_src");
1980 if (session->send_rtp_src == NULL)
1983 /* ghost the new source pad */
1984 klass = GST_ELEMENT_GET_CLASS (rtpbin);
1985 gname = g_strdup_printf ("send_rtp_src_%d", sessid);
1986 templ = gst_element_class_get_pad_template (klass, "send_rtp_src_%d");
1988 gst_ghost_pad_new_from_template (gname, session->send_rtp_src, templ);
1989 gst_pad_set_active (srcghost, TRUE);
1990 gst_element_add_pad (GST_ELEMENT_CAST (rtpbin), srcghost);
1998 g_warning ("gstrtpbin: invalid name given");
2003 /* create_session already warned */
2008 g_warning ("gstrtpbin: send_rtp pad already requested for session %d",
2014 g_warning ("gstrtpbin: failed to get session pad for session %d", sessid);
2019 g_warning ("gstrtpbin: failed to get rtp source pad for session %d",
2025 /* Create a pad for sending RTCP for the session in @name. Must be called with
2029 create_rtcp (GstRtpBin * rtpbin, GstPadTemplate * templ, const gchar * name)
2033 GstRtpBinSession *session;
2035 /* first get the session number */
2036 if (name == NULL || sscanf (name, "send_rtcp_src_%d", &sessid) != 1)
2039 /* get or create session */
2040 session = find_session_by_id (rtpbin, sessid);
2044 /* check if pad was requested */
2045 if (session->send_rtcp_src != NULL)
2048 /* get rtcp_src pad and store */
2049 session->send_rtcp_src =
2050 gst_element_get_request_pad (session->session, "send_rtcp_src");
2051 if (session->send_rtcp_src == NULL)
2055 gst_ghost_pad_new_from_template (name, session->send_rtcp_src, templ);
2056 gst_pad_set_active (result, TRUE);
2057 gst_element_add_pad (GST_ELEMENT_CAST (rtpbin), result);
2064 g_warning ("gstrtpbin: invalid name given");
2069 g_warning ("gstrtpbin: session with id %d does not exist", sessid);
2074 g_warning ("gstrtpbin: send_rtcp_src pad already requested for session %d",
2080 g_warning ("gstrtpbin: failed to get rtcp pad for session %d", sessid);
2085 /* If the requested name is NULL we should create a name with
2086 * the session number assuming we want the lowest posible session
2087 * with a free pad like the template */
2089 gst_rtp_bin_get_free_pad_name (GstElement * element, GstPadTemplate * templ)
2091 gboolean name_found = FALSE;
2094 GstIterator *pad_it = NULL;
2095 gchar *pad_name = NULL;
2097 GST_DEBUG_OBJECT (element, "find a free pad name for template");
2098 while (!name_found) {
2100 pad_name = g_strdup_printf (templ->name_template, session++);
2101 pad_it = gst_element_iterate_pads (GST_ELEMENT (element));
2103 while (gst_iterator_next (pad_it, (gpointer) & pad) == GST_ITERATOR_OK) {
2104 if (strcmp (gst_pad_get_name (pad), pad_name) == 0)
2107 gst_iterator_free (pad_it);
2110 GST_DEBUG_OBJECT (element, "free pad name found: '%s'", pad_name);
2117 gst_rtp_bin_request_new_pad (GstElement * element,
2118 GstPadTemplate * templ, const gchar * name)
2121 GstElementClass *klass;
2123 gchar *pad_name = NULL;
2125 g_return_val_if_fail (templ != NULL, NULL);
2126 g_return_val_if_fail (GST_IS_RTP_BIN (element), NULL);
2128 rtpbin = GST_RTP_BIN (element);
2129 klass = GST_ELEMENT_GET_CLASS (element);
2131 GST_RTP_BIN_LOCK (rtpbin);
2134 /* use a free pad name */
2135 pad_name = gst_rtp_bin_get_free_pad_name (element, templ);
2137 /* use the provided name */
2138 pad_name = g_strdup (name);
2141 GST_DEBUG ("Trying to request a pad with name %s", pad_name);
2143 /* figure out the template */
2144 if (templ == gst_element_class_get_pad_template (klass, "recv_rtp_sink_%d")) {
2145 result = create_recv_rtp (rtpbin, templ, pad_name);
2146 } else if (templ == gst_element_class_get_pad_template (klass,
2147 "recv_rtcp_sink_%d")) {
2148 result = create_recv_rtcp (rtpbin, templ, pad_name);
2149 } else if (templ == gst_element_class_get_pad_template (klass,
2150 "send_rtp_sink_%d")) {
2151 result = create_send_rtp (rtpbin, templ, pad_name);
2152 } else if (templ == gst_element_class_get_pad_template (klass,
2153 "send_rtcp_src_%d")) {
2154 result = create_rtcp (rtpbin, templ, pad_name);
2156 goto wrong_template;
2159 GST_RTP_BIN_UNLOCK (rtpbin);
2167 GST_RTP_BIN_UNLOCK (rtpbin);
2168 g_warning ("gstrtpbin: this is not our template");
2174 gst_rtp_bin_release_pad (GstElement * element, GstPad * pad)