2 * Copyright (C) <2007> Wim Taymans <wim.taymans@gmail.com>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
23 * SECTION:element-gstrtpssrcdemux
25 * gstrtpssrcdemux acts as a demuxer for RTP packets based on the SSRC of the
26 * packets. Its main purpose is to allow an application to easily receive and
27 * decode an RTP stream with multiple SSRCs.
29 * For each SSRC that is detected, a new pad will be created and the
30 * #GstRtpSsrcDemux::new-ssrc-pad signal will be emitted.
33 * <title>Example pipelines</title>
35 * gst-launch udpsrc caps="application/x-rtp" ! gstrtpssrcdemux ! fakesink
36 * ]| Takes an RTP stream and send the RTP packets with the first detected SSRC
37 * to fakesink, discarding the other SSRCs.
40 * Last reviewed on 2007-05-28 (0.10.5)
48 #include <gst/rtp/gstrtpbuffer.h>
49 #include <gst/rtp/gstrtcpbuffer.h>
51 #include "gstrtpbin-marshal.h"
52 #include "gstrtpssrcdemux.h"
54 GST_DEBUG_CATEGORY_STATIC (gst_rtp_ssrc_demux_debug);
55 #define GST_CAT_DEFAULT gst_rtp_ssrc_demux_debug
57 /* generic templates */
58 static GstStaticPadTemplate rtp_ssrc_demux_sink_template =
59 GST_STATIC_PAD_TEMPLATE ("sink",
62 GST_STATIC_CAPS ("application/x-rtp")
65 static GstStaticPadTemplate rtp_ssrc_demux_rtcp_sink_template =
66 GST_STATIC_PAD_TEMPLATE ("rtcp_sink",
69 GST_STATIC_CAPS ("application/x-rtcp")
72 static GstStaticPadTemplate rtp_ssrc_demux_src_template =
73 GST_STATIC_PAD_TEMPLATE ("src_%u",
76 GST_STATIC_CAPS ("application/x-rtp")
79 static GstStaticPadTemplate rtp_ssrc_demux_rtcp_src_template =
80 GST_STATIC_PAD_TEMPLATE ("rtcp_src_%u",
83 GST_STATIC_CAPS ("application/x-rtcp")
86 #define GST_PAD_LOCK(obj) (g_rec_mutex_lock (&(obj)->padlock))
87 #define GST_PAD_UNLOCK(obj) (g_rec_mutex_unlock (&(obj)->padlock))
99 SIGNAL_REMOVED_SSRC_PAD,
104 #define gst_rtp_ssrc_demux_parent_class parent_class
105 G_DEFINE_TYPE (GstRtpSsrcDemux, gst_rtp_ssrc_demux, GST_TYPE_ELEMENT);
107 /* GObject vmethods */
108 static void gst_rtp_ssrc_demux_dispose (GObject * object);
109 static void gst_rtp_ssrc_demux_finalize (GObject * object);
111 /* GstElement vmethods */
112 static GstStateChangeReturn gst_rtp_ssrc_demux_change_state (GstElement *
113 element, GstStateChange transition);
115 static void gst_rtp_ssrc_demux_clear_ssrc (GstRtpSsrcDemux * demux,
119 static GstFlowReturn gst_rtp_ssrc_demux_chain (GstPad * pad, GstObject * parent,
121 static gboolean gst_rtp_ssrc_demux_sink_event (GstPad * pad, GstObject * parent,
124 static GstFlowReturn gst_rtp_ssrc_demux_rtcp_chain (GstPad * pad,
125 GstObject * parent, GstBuffer * buf);
126 static gboolean gst_rtp_ssrc_demux_rtcp_sink_event (GstPad * pad,
127 GstObject * parent, GstEvent * event);
128 static GstIterator *gst_rtp_ssrc_demux_iterate_internal_links_sink (GstPad *
129 pad, GstObject * parent);
132 static gboolean gst_rtp_ssrc_demux_src_event (GstPad * pad, GstObject * parent,
134 static GstIterator *gst_rtp_ssrc_demux_iterate_internal_links_src (GstPad * pad,
136 static gboolean gst_rtp_ssrc_demux_src_query (GstPad * pad, GstObject * parent,
139 static guint gst_rtp_ssrc_demux_signals[LAST_SIGNAL] = { 0 };
142 * Item for storing GstPad <-> SSRC pairs.
144 struct _GstRtpSsrcDemuxPad
152 /* find a src pad for a given SSRC, returns NULL if the SSRC was not found
154 static GstRtpSsrcDemuxPad *
155 find_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
159 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
160 GstRtpSsrcDemuxPad *pad = (GstRtpSsrcDemuxPad *) walk->data;
162 if (pad->ssrc == ssrc)
169 add_ssrc_and_ref (GstEvent * event, guint32 ssrc)
171 /* Set the ssrc on the output caps */
172 switch (GST_EVENT_TYPE (event)) {
179 gst_event_parse_caps (event, &caps);
180 newcaps = gst_caps_copy (caps);
182 s = gst_caps_get_structure (newcaps, 0);
183 gst_structure_set (s, "ssrc", G_TYPE_UINT, ssrc, NULL);
184 event = gst_event_new_caps (newcaps);
185 gst_caps_unref (newcaps);
189 gst_event_ref (event);
196 struct ForwardEventData
203 forward_sticky_events (GstPad * pad, GstEvent ** event, gpointer user_data)
205 struct ForwardEventData *data = user_data;
208 newevent = add_ssrc_and_ref (*event, data->ssrc);
210 gst_pad_push_event (data->pad, newevent);
217 find_or_create_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc,
220 GstPad *rtp_pad, *rtcp_pad;
221 GstElementClass *klass;
222 GstPadTemplate *templ;
224 GstRtpSsrcDemuxPad *demuxpad;
226 struct ForwardEventData fdata;
229 GST_DEBUG_OBJECT (demux, "creating pad for SSRC %08x", ssrc);
231 GST_PAD_LOCK (demux);
233 demuxpad = find_demux_pad_for_ssrc (demux, ssrc);
234 if (demuxpad != NULL) {
237 retpad = gst_object_ref (demuxpad->rtp_pad);
240 retpad = gst_object_ref (demuxpad->rtcp_pad);
243 g_assert_not_reached ();
245 GST_PAD_UNLOCK (demux);
249 klass = GST_ELEMENT_GET_CLASS (demux);
250 templ = gst_element_class_get_pad_template (klass, "src_%u");
251 padname = g_strdup_printf ("src_%u", ssrc);
252 rtp_pad = gst_pad_new_from_template (templ, padname);
255 templ = gst_element_class_get_pad_template (klass, "rtcp_src_%u");
256 padname = g_strdup_printf ("rtcp_src_%u", ssrc);
257 rtcp_pad = gst_pad_new_from_template (templ, padname);
260 /* wrap in structure and add to list */
261 demuxpad = g_new0 (GstRtpSsrcDemuxPad, 1);
262 demuxpad->ssrc = ssrc;
263 demuxpad->rtp_pad = rtp_pad;
264 demuxpad->rtcp_pad = rtcp_pad;
268 gst_pad_set_element_private (rtp_pad, demuxpad);
269 gst_pad_set_element_private (rtcp_pad, demuxpad);
271 demux->srcpads = g_slist_prepend (demux->srcpads, demuxpad);
273 gst_pad_set_query_function (rtp_pad, gst_rtp_ssrc_demux_src_query);
274 gst_pad_set_iterate_internal_links_function (rtp_pad,
275 gst_rtp_ssrc_demux_iterate_internal_links_src);
276 gst_pad_set_event_function (rtp_pad, gst_rtp_ssrc_demux_src_event);
277 gst_pad_use_fixed_caps (rtp_pad);
278 gst_pad_set_active (rtp_pad, TRUE);
280 gst_pad_sticky_events_foreach (demux->rtp_sink, forward_sticky_events,
283 gst_pad_set_event_function (rtcp_pad, gst_rtp_ssrc_demux_src_event);
284 gst_pad_set_iterate_internal_links_function (rtcp_pad,
285 gst_rtp_ssrc_demux_iterate_internal_links_src);
286 gst_pad_use_fixed_caps (rtcp_pad);
287 gst_pad_set_active (rtcp_pad, TRUE);
288 fdata.pad = rtcp_pad;
289 gst_pad_sticky_events_foreach (demux->rtcp_sink, forward_sticky_events,
292 /* copy caps from input */
293 if ((caps = gst_pad_get_current_caps (demux->rtp_sink))) {
294 gst_pad_set_caps (rtp_pad, caps);
295 gst_caps_unref (caps);
297 if ((caps = gst_pad_get_current_caps (demux->rtcp_sink))) {
298 gst_pad_set_caps (rtcp_pad, caps);
299 gst_caps_unref (caps);
301 gst_element_add_pad (GST_ELEMENT_CAST (demux), rtp_pad);
302 gst_element_add_pad (GST_ELEMENT_CAST (demux), rtcp_pad);
306 retpad = gst_object_ref (demuxpad->rtp_pad);
309 retpad = gst_object_ref (demuxpad->rtcp_pad);
312 g_assert_not_reached ();
315 gst_object_ref (rtp_pad);
317 GST_PAD_UNLOCK (demux);
319 g_signal_emit (G_OBJECT (demux),
320 gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD], 0, ssrc, rtp_pad);
322 gst_object_unref (rtp_pad);
328 gst_rtp_ssrc_demux_class_init (GstRtpSsrcDemuxClass * klass)
330 GObjectClass *gobject_klass;
331 GstElementClass *gstelement_klass;
332 GstRtpSsrcDemuxClass *gstrtpssrcdemux_klass;
334 gobject_klass = (GObjectClass *) klass;
335 gstelement_klass = (GstElementClass *) klass;
336 gstrtpssrcdemux_klass = (GstRtpSsrcDemuxClass *) klass;
338 gobject_klass->dispose = gst_rtp_ssrc_demux_dispose;
339 gobject_klass->finalize = gst_rtp_ssrc_demux_finalize;
342 * GstRtpSsrcDemux::new-ssrc-pad:
343 * @demux: the object which received the signal
344 * @ssrc: the SSRC of the pad
347 * Emited when a new SSRC pad has been created.
349 gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD] =
350 g_signal_new ("new-ssrc-pad",
351 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
352 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, new_ssrc_pad),
353 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_OBJECT,
354 G_TYPE_NONE, 2, G_TYPE_UINT, GST_TYPE_PAD);
357 * GstRtpSsrcDemux::removed-ssrc-pad:
358 * @demux: the object which received the signal
359 * @ssrc: the SSRC of the pad
360 * @pad: the removed pad.
362 * Emited when a SSRC pad has been removed.
364 gst_rtp_ssrc_demux_signals[SIGNAL_REMOVED_SSRC_PAD] =
365 g_signal_new ("removed-ssrc-pad",
366 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
367 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, removed_ssrc_pad),
368 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_OBJECT,
369 G_TYPE_NONE, 2, G_TYPE_UINT, GST_TYPE_PAD);
372 * GstRtpSsrcDemux::clear-ssrc:
373 * @demux: the object which received the signal
374 * @ssrc: the SSRC of the pad
376 * Action signal to remove the pad for SSRC.
378 gst_rtp_ssrc_demux_signals[SIGNAL_CLEAR_SSRC] =
379 g_signal_new ("clear-ssrc",
380 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
381 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, clear_ssrc),
382 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT, G_TYPE_NONE, 1, G_TYPE_UINT);
384 gstelement_klass->change_state =
385 GST_DEBUG_FUNCPTR (gst_rtp_ssrc_demux_change_state);
386 gstrtpssrcdemux_klass->clear_ssrc =
387 GST_DEBUG_FUNCPTR (gst_rtp_ssrc_demux_clear_ssrc);
389 gst_element_class_add_pad_template (gstelement_klass,
390 gst_static_pad_template_get (&rtp_ssrc_demux_sink_template));
391 gst_element_class_add_pad_template (gstelement_klass,
392 gst_static_pad_template_get (&rtp_ssrc_demux_rtcp_sink_template));
393 gst_element_class_add_pad_template (gstelement_klass,
394 gst_static_pad_template_get (&rtp_ssrc_demux_src_template));
395 gst_element_class_add_pad_template (gstelement_klass,
396 gst_static_pad_template_get (&rtp_ssrc_demux_rtcp_src_template));
398 gst_element_class_set_static_metadata (gstelement_klass, "RTP SSRC Demux",
400 "Splits RTP streams based on the SSRC",
401 "Wim Taymans <wim.taymans@gmail.com>");
403 GST_DEBUG_CATEGORY_INIT (gst_rtp_ssrc_demux_debug,
404 "rtpssrcdemux", 0, "RTP SSRC demuxer");
408 gst_rtp_ssrc_demux_init (GstRtpSsrcDemux * demux)
410 GstElementClass *klass = GST_ELEMENT_GET_CLASS (demux);
413 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
415 gst_pad_set_chain_function (demux->rtp_sink, gst_rtp_ssrc_demux_chain);
416 gst_pad_set_event_function (demux->rtp_sink, gst_rtp_ssrc_demux_sink_event);
417 gst_pad_set_iterate_internal_links_function (demux->rtp_sink,
418 gst_rtp_ssrc_demux_iterate_internal_links_sink);
419 gst_element_add_pad (GST_ELEMENT_CAST (demux), demux->rtp_sink);
422 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
423 "rtcp_sink"), "rtcp_sink");
424 gst_pad_set_chain_function (demux->rtcp_sink, gst_rtp_ssrc_demux_rtcp_chain);
425 gst_pad_set_event_function (demux->rtcp_sink,
426 gst_rtp_ssrc_demux_rtcp_sink_event);
427 gst_pad_set_iterate_internal_links_function (demux->rtcp_sink,
428 gst_rtp_ssrc_demux_iterate_internal_links_sink);
429 gst_element_add_pad (GST_ELEMENT_CAST (demux), demux->rtcp_sink);
431 g_rec_mutex_init (&demux->padlock);
433 gst_segment_init (&demux->segment, GST_FORMAT_UNDEFINED);
437 gst_rtp_ssrc_demux_reset (GstRtpSsrcDemux * demux)
441 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
442 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
444 gst_pad_set_active (dpad->rtp_pad, FALSE);
445 gst_pad_set_active (dpad->rtcp_pad, FALSE);
447 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtp_pad);
448 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtcp_pad);
451 g_slist_free (demux->srcpads);
452 demux->srcpads = NULL;
456 gst_rtp_ssrc_demux_dispose (GObject * object)
458 GstRtpSsrcDemux *demux;
460 demux = GST_RTP_SSRC_DEMUX (object);
462 gst_rtp_ssrc_demux_reset (demux);
464 G_OBJECT_CLASS (parent_class)->dispose (object);
468 gst_rtp_ssrc_demux_finalize (GObject * object)
470 GstRtpSsrcDemux *demux;
472 demux = GST_RTP_SSRC_DEMUX (object);
473 g_rec_mutex_clear (&demux->padlock);
475 G_OBJECT_CLASS (parent_class)->finalize (object);
479 gst_rtp_ssrc_demux_clear_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
481 GstRtpSsrcDemuxPad *dpad;
483 GST_PAD_LOCK (demux);
484 dpad = find_demux_pad_for_ssrc (demux, ssrc);
486 GST_PAD_UNLOCK (demux);
490 GST_DEBUG_OBJECT (demux, "clearing pad for SSRC %08x", ssrc);
492 demux->srcpads = g_slist_remove (demux->srcpads, dpad);
493 GST_PAD_UNLOCK (demux);
495 gst_pad_set_active (dpad->rtp_pad, FALSE);
496 gst_pad_set_active (dpad->rtcp_pad, FALSE);
498 g_signal_emit (G_OBJECT (demux),
499 gst_rtp_ssrc_demux_signals[SIGNAL_REMOVED_SSRC_PAD], 0, ssrc,
502 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtp_pad);
503 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtcp_pad);
512 GST_WARNING_OBJECT (demux, "unknown SSRC %08x", ssrc);
518 gst_rtp_ssrc_demux_sink_event (GstPad * pad, GstObject * parent,
521 GstRtpSsrcDemux *demux;
522 gboolean res = FALSE;
524 demux = GST_RTP_SSRC_DEMUX (parent);
526 switch (GST_EVENT_TYPE (event)) {
527 case GST_EVENT_FLUSH_STOP:
528 gst_segment_init (&demux->segment, GST_FORMAT_UNDEFINED);
536 /* need local snapshot of pads;
537 * should not push downstream while holding lock as that might deadlock
538 * with stuff traveling upstream tyring to get this lock while holding
539 * other (stream)lock */
540 GST_PAD_LOCK (demux);
541 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
542 GstRtpSsrcDemuxPad *pad = (GstRtpSsrcDemuxPad *) walk->data;
544 pad = g_slice_dup (GstRtpSsrcDemuxPad, pad);
545 gst_object_ref (pad->rtp_pad);
547 pads = g_slist_prepend (pads, pad);
549 GST_PAD_UNLOCK (demux);
551 for (walk = pads; walk; walk = g_slist_next (walk)) {
552 GstRtpSsrcDemuxPad *dpad = walk->data;
555 newevent = add_ssrc_and_ref (event, dpad->ssrc);
557 res &= gst_pad_push_event (dpad->rtp_pad, newevent);
558 gst_object_unref (dpad->rtp_pad);
559 g_slice_free (GstRtpSsrcDemuxPad, dpad);
562 gst_event_unref (event);
571 gst_rtp_ssrc_demux_rtcp_sink_event (GstPad * pad, GstObject * parent,
574 GstRtpSsrcDemux *demux;
579 demux = GST_RTP_SSRC_DEMUX (parent);
581 GST_PAD_LOCK (demux);
582 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
583 GstRtpSsrcDemuxPad *pad = (GstRtpSsrcDemuxPad *) walk->data;
585 pad = g_slice_dup (GstRtpSsrcDemuxPad, pad);
586 gst_object_ref (pad->rtcp_pad);
588 pads = g_slist_prepend (pads, pad);
590 GST_PAD_UNLOCK (demux);
592 for (walk = pads; walk; walk = g_slist_next (walk)) {
593 GstRtpSsrcDemuxPad *dpad = walk->data;
596 newevent = add_ssrc_and_ref (event, dpad->ssrc);
598 res &= gst_pad_push_event (dpad->rtcp_pad, newevent);
599 gst_object_unref (dpad->rtcp_pad);
600 g_slice_free (GstRtpSsrcDemuxPad, dpad);
603 gst_event_unref (event);
609 gst_rtp_ssrc_demux_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
612 GstRtpSsrcDemux *demux;
614 GstRTPBuffer rtp = { NULL };
617 demux = GST_RTP_SSRC_DEMUX (parent);
619 if (!gst_rtp_buffer_map (buf, GST_MAP_READ, &rtp))
620 goto invalid_payload;
622 ssrc = gst_rtp_buffer_get_ssrc (&rtp);
623 gst_rtp_buffer_unmap (&rtp);
625 GST_DEBUG_OBJECT (demux, "received buffer of SSRC %08x", ssrc);
627 srcpad = find_or_create_demux_pad_for_ssrc (demux, ssrc, RTP_PAD);
632 ret = gst_pad_push (srcpad, buf);
634 gst_object_unref (srcpad);
641 /* this is fatal and should be filtered earlier */
642 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
643 ("Dropping invalid RTP payload"));
644 gst_buffer_unref (buf);
645 return GST_FLOW_ERROR;
649 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
650 ("Could not create new pad"));
651 gst_buffer_unref (buf);
652 return GST_FLOW_ERROR;
657 gst_rtp_ssrc_demux_rtcp_chain (GstPad * pad, GstObject * parent,
661 GstRtpSsrcDemux *demux;
663 GstRTCPPacket packet;
664 GstRTCPBuffer rtcp = { NULL, };
667 demux = GST_RTP_SSRC_DEMUX (parent);
669 if (!gst_rtcp_buffer_validate (buf))
672 gst_rtcp_buffer_map (buf, GST_MAP_READ, &rtcp);
673 if (!gst_rtcp_buffer_get_first_packet (&rtcp, &packet)) {
674 gst_rtcp_buffer_unmap (&rtcp);
678 /* first packet must be SR or RR or else the validate would have failed */
679 switch (gst_rtcp_packet_get_type (&packet)) {
680 case GST_RTCP_TYPE_SR:
681 /* get the ssrc so that we can route it to the right source pad */
682 gst_rtcp_packet_sr_get_sender_info (&packet, &ssrc, NULL, NULL, NULL,
686 goto unexpected_rtcp;
688 gst_rtcp_buffer_unmap (&rtcp);
690 GST_DEBUG_OBJECT (demux, "received RTCP of SSRC %08x", ssrc);
692 srcpad = find_or_create_demux_pad_for_ssrc (demux, ssrc, RTCP_PAD);
697 ret = gst_pad_push (srcpad, buf);
699 gst_object_unref (srcpad);
706 /* this is fatal and should be filtered earlier */
707 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
708 ("Dropping invalid RTCP packet"));
709 gst_buffer_unref (buf);
710 return GST_FLOW_ERROR;
714 GST_DEBUG_OBJECT (demux, "dropping unexpected RTCP packet");
715 gst_buffer_unref (buf);
720 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
721 ("Could not create new pad"));
722 gst_buffer_unref (buf);
723 return GST_FLOW_ERROR;
727 static GstRtpSsrcDemuxPad *
728 find_demux_pad_for_pad (GstRtpSsrcDemux * demux, GstPad * pad)
732 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
733 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
734 if (dpad->rtp_pad == pad || dpad->rtcp_pad == pad) {
744 gst_rtp_ssrc_demux_src_event (GstPad * pad, GstObject * parent,
747 GstRtpSsrcDemux *demux;
748 const GstStructure *s;
750 demux = GST_RTP_SSRC_DEMUX (parent);
752 switch (GST_EVENT_TYPE (event)) {
753 case GST_EVENT_CUSTOM_UPSTREAM:
754 case GST_EVENT_CUSTOM_BOTH:
755 case GST_EVENT_CUSTOM_BOTH_OOB:
756 s = gst_event_get_structure (event);
757 if (s && !gst_structure_has_field (s, "ssrc")) {
758 GstRtpSsrcDemuxPad *dpad = find_demux_pad_for_pad (demux, pad);
763 event = gst_event_make_writable (event);
764 ws = gst_event_writable_structure (event);
765 gst_structure_set (ws, "ssrc", G_TYPE_UINT, dpad->ssrc, NULL);
773 return gst_pad_event_default (pad, parent, event);
777 gst_rtp_ssrc_demux_iterate_internal_links_src (GstPad * pad, GstObject * parent)
779 GstRtpSsrcDemux *demux;
780 GstPad *otherpad = NULL;
781 GstIterator *it = NULL;
784 demux = GST_RTP_SSRC_DEMUX (parent);
786 GST_PAD_LOCK (demux);
787 for (current = demux->srcpads; current; current = g_slist_next (current)) {
788 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) current->data;
790 if (pad == dpad->rtp_pad) {
791 otherpad = demux->rtp_sink;
793 } else if (pad == dpad->rtcp_pad) {
794 otherpad = demux->rtcp_sink;
801 g_value_init (&val, GST_TYPE_PAD);
802 g_value_set_object (&val, otherpad);
803 it = gst_iterator_new_single (GST_TYPE_PAD, &val);
804 g_value_unset (&val);
807 GST_PAD_UNLOCK (demux);
812 /* Should return 0 for elements to be included */
814 src_pad_compare_func (gconstpointer a, gconstpointer b)
816 GstPad *pad = GST_PAD (g_value_get_object (a));
817 const gchar *prefix = g_value_get_string (b);
820 GST_OBJECT_LOCK (pad);
821 res = !GST_PAD_NAME (pad) || g_str_has_prefix (GST_PAD_NAME (pad), prefix);
822 GST_OBJECT_UNLOCK (pad);
828 gst_rtp_ssrc_demux_iterate_internal_links_sink (GstPad * pad,
831 GstRtpSsrcDemux *demux;
832 GstIterator *it = NULL;
833 GValue gval = { 0, };
835 demux = GST_RTP_SSRC_DEMUX (parent);
837 g_value_init (&gval, G_TYPE_STRING);
838 if (pad == demux->rtp_sink)
839 g_value_set_static_string (&gval, "src_");
840 else if (pad == demux->rtcp_sink)
841 g_value_set_static_string (&gval, "rtcp_src_");
843 g_assert_not_reached ();
845 it = gst_element_iterate_src_pads (GST_ELEMENT_CAST (demux));
846 it = gst_iterator_filter (it, src_pad_compare_func, &gval);
853 gst_rtp_ssrc_demux_src_query (GstPad * pad, GstObject * parent,
856 GstRtpSsrcDemux *demux;
857 gboolean res = FALSE;
859 demux = GST_RTP_SSRC_DEMUX (parent);
861 switch (GST_QUERY_TYPE (query)) {
862 case GST_QUERY_LATENCY:
865 if ((res = gst_pad_peer_query (demux->rtp_sink, query))) {
867 GstClockTime min_latency, max_latency;
868 GstRtpSsrcDemuxPad *demuxpad;
870 demuxpad = gst_pad_get_element_private (pad);
872 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
874 GST_DEBUG_OBJECT (demux, "peer min latency %" GST_TIME_FORMAT,
875 GST_TIME_ARGS (min_latency));
877 GST_DEBUG_OBJECT (demux, "latency for SSRC %08x", demuxpad->ssrc);
879 gst_query_set_latency (query, live, min_latency, max_latency);
884 res = gst_pad_query_default (pad, parent, query);
891 static GstStateChangeReturn
892 gst_rtp_ssrc_demux_change_state (GstElement * element,
893 GstStateChange transition)
895 GstStateChangeReturn ret;
896 GstRtpSsrcDemux *demux;
898 demux = GST_RTP_SSRC_DEMUX (element);
900 switch (transition) {
901 case GST_STATE_CHANGE_NULL_TO_READY:
902 case GST_STATE_CHANGE_READY_TO_PAUSED:
903 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
908 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
910 switch (transition) {
911 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
913 case GST_STATE_CHANGE_PAUSED_TO_READY:
914 gst_rtp_ssrc_demux_reset (demux);
916 case GST_STATE_CHANGE_READY_TO_NULL: