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., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
23 * SECTION:element-rtpssrcdemux
25 * rtpssrcdemux 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-1.0 udpsrc caps="application/x-rtp" ! rtpssrcdemux ! fakesink
36 * ]| Takes an RTP stream and send the RTP packets with the first detected SSRC
37 * to fakesink, discarding the other SSRCs.
46 #include <gst/rtp/gstrtpbuffer.h>
47 #include <gst/rtp/gstrtcpbuffer.h>
49 #include "gstrtpssrcdemux.h"
51 GST_DEBUG_CATEGORY_STATIC (gst_rtp_ssrc_demux_debug);
52 #define GST_CAT_DEFAULT gst_rtp_ssrc_demux_debug
54 /* generic templates */
55 static GstStaticPadTemplate rtp_ssrc_demux_sink_template =
56 GST_STATIC_PAD_TEMPLATE ("sink",
59 GST_STATIC_CAPS ("application/x-rtp")
62 static GstStaticPadTemplate rtp_ssrc_demux_rtcp_sink_template =
63 GST_STATIC_PAD_TEMPLATE ("rtcp_sink",
66 GST_STATIC_CAPS ("application/x-rtcp")
69 static GstStaticPadTemplate rtp_ssrc_demux_src_template =
70 GST_STATIC_PAD_TEMPLATE ("src_%u",
73 GST_STATIC_CAPS ("application/x-rtp")
76 static GstStaticPadTemplate rtp_ssrc_demux_rtcp_src_template =
77 GST_STATIC_PAD_TEMPLATE ("rtcp_src_%u",
80 GST_STATIC_CAPS ("application/x-rtcp")
83 #define GST_PAD_LOCK(obj) (g_rec_mutex_lock (&(obj)->padlock))
84 #define GST_PAD_UNLOCK(obj) (g_rec_mutex_unlock (&(obj)->padlock))
96 SIGNAL_REMOVED_SSRC_PAD,
101 #define gst_rtp_ssrc_demux_parent_class parent_class
102 G_DEFINE_TYPE (GstRtpSsrcDemux, gst_rtp_ssrc_demux, GST_TYPE_ELEMENT);
104 /* GObject vmethods */
105 static void gst_rtp_ssrc_demux_dispose (GObject * object);
106 static void gst_rtp_ssrc_demux_finalize (GObject * object);
108 /* GstElement vmethods */
109 static GstStateChangeReturn gst_rtp_ssrc_demux_change_state (GstElement *
110 element, GstStateChange transition);
112 static void gst_rtp_ssrc_demux_clear_ssrc (GstRtpSsrcDemux * demux,
116 static GstFlowReturn gst_rtp_ssrc_demux_chain (GstPad * pad, GstObject * parent,
118 static gboolean gst_rtp_ssrc_demux_sink_event (GstPad * pad, GstObject * parent,
121 static GstFlowReturn gst_rtp_ssrc_demux_rtcp_chain (GstPad * pad,
122 GstObject * parent, GstBuffer * buf);
123 static GstIterator *gst_rtp_ssrc_demux_iterate_internal_links_sink (GstPad *
124 pad, GstObject * parent);
127 static gboolean gst_rtp_ssrc_demux_src_event (GstPad * pad, GstObject * parent,
129 static GstIterator *gst_rtp_ssrc_demux_iterate_internal_links_src (GstPad * pad,
131 static gboolean gst_rtp_ssrc_demux_src_query (GstPad * pad, GstObject * parent,
134 static guint gst_rtp_ssrc_demux_signals[LAST_SIGNAL] = { 0 };
137 * Item for storing GstPad <-> SSRC pairs.
139 struct _GstRtpSsrcDemuxPad
147 /* find a src pad for a given SSRC, returns NULL if the SSRC was not found
149 static GstRtpSsrcDemuxPad *
150 find_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
154 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
155 GstRtpSsrcDemuxPad *pad = (GstRtpSsrcDemuxPad *) walk->data;
157 if (pad->ssrc == ssrc)
164 add_ssrc_and_ref (GstEvent * event, guint32 ssrc)
166 /* Set the ssrc on the output caps */
167 switch (GST_EVENT_TYPE (event)) {
174 gst_event_parse_caps (event, &caps);
175 newcaps = gst_caps_copy (caps);
177 s = gst_caps_get_structure (newcaps, 0);
178 gst_structure_set (s, "ssrc", G_TYPE_UINT, ssrc, NULL);
179 event = gst_event_new_caps (newcaps);
180 gst_caps_unref (newcaps);
184 gst_event_ref (event);
191 struct ForwardStickyEventData
197 /* With internal stream lock held */
199 forward_sticky_events (GstPad * pad, GstEvent ** event, gpointer user_data)
201 struct ForwardStickyEventData *data = user_data;
204 newevent = add_ssrc_and_ref (*event, data->ssrc);
206 gst_pad_push_event (data->pad, newevent);
211 /* With internal stream lock held */
213 forward_initial_events (GstRtpSsrcDemux * demux, guint32 ssrc, GstPad * pad,
216 struct ForwardStickyEventData fdata;
217 GstPad *sinkpad = NULL;
219 if (padtype == RTP_PAD)
220 sinkpad = demux->rtp_sink;
221 else if (padtype == RTCP_PAD)
222 sinkpad = demux->rtcp_sink;
224 g_assert_not_reached ();
229 gst_pad_sticky_events_foreach (sinkpad, forward_sticky_events, &fdata);
233 find_or_create_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc,
236 GstPad *rtp_pad, *rtcp_pad;
237 GstElementClass *klass;
238 GstPadTemplate *templ;
240 GstRtpSsrcDemuxPad *demuxpad;
243 GST_PAD_LOCK (demux);
245 demuxpad = find_demux_pad_for_ssrc (demux, ssrc);
246 if (demuxpad != NULL) {
249 retpad = gst_object_ref (demuxpad->rtp_pad);
252 retpad = gst_object_ref (demuxpad->rtcp_pad);
256 g_assert_not_reached ();
259 GST_PAD_UNLOCK (demux);
264 GST_DEBUG_OBJECT (demux, "creating new pad for SSRC %08x", ssrc);
266 klass = GST_ELEMENT_GET_CLASS (demux);
267 templ = gst_element_class_get_pad_template (klass, "src_%u");
268 padname = g_strdup_printf ("src_%u", ssrc);
269 rtp_pad = gst_pad_new_from_template (templ, padname);
272 templ = gst_element_class_get_pad_template (klass, "rtcp_src_%u");
273 padname = g_strdup_printf ("rtcp_src_%u", ssrc);
274 rtcp_pad = gst_pad_new_from_template (templ, padname);
277 /* wrap in structure and add to list */
278 demuxpad = g_new0 (GstRtpSsrcDemuxPad, 1);
279 demuxpad->ssrc = ssrc;
280 demuxpad->rtp_pad = rtp_pad;
281 demuxpad->rtcp_pad = rtcp_pad;
283 gst_pad_set_element_private (rtp_pad, demuxpad);
284 gst_pad_set_element_private (rtcp_pad, demuxpad);
286 demux->srcpads = g_slist_prepend (demux->srcpads, demuxpad);
288 gst_pad_set_query_function (rtp_pad, gst_rtp_ssrc_demux_src_query);
289 gst_pad_set_iterate_internal_links_function (rtp_pad,
290 gst_rtp_ssrc_demux_iterate_internal_links_src);
291 gst_pad_set_event_function (rtp_pad, gst_rtp_ssrc_demux_src_event);
292 gst_pad_use_fixed_caps (rtp_pad);
293 gst_pad_set_active (rtp_pad, TRUE);
295 gst_pad_set_event_function (rtcp_pad, gst_rtp_ssrc_demux_src_event);
296 gst_pad_set_iterate_internal_links_function (rtcp_pad,
297 gst_rtp_ssrc_demux_iterate_internal_links_src);
298 gst_pad_use_fixed_caps (rtcp_pad);
299 gst_pad_set_active (rtcp_pad, TRUE);
301 forward_initial_events (demux, ssrc, rtp_pad, RTP_PAD);
302 forward_initial_events (demux, ssrc, rtcp_pad, RTCP_PAD);
304 gst_element_add_pad (GST_ELEMENT_CAST (demux), rtp_pad);
305 gst_element_add_pad (GST_ELEMENT_CAST (demux), rtcp_pad);
309 retpad = gst_object_ref (demuxpad->rtp_pad);
312 retpad = gst_object_ref (demuxpad->rtcp_pad);
316 g_assert_not_reached ();
319 gst_object_ref (rtp_pad);
320 gst_object_ref (rtcp_pad);
322 g_signal_emit (G_OBJECT (demux),
323 gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD], 0, ssrc, rtp_pad);
325 GST_PAD_UNLOCK (demux);
327 gst_object_unref (rtp_pad);
328 gst_object_unref (rtcp_pad);
334 gst_rtp_ssrc_demux_class_init (GstRtpSsrcDemuxClass * klass)
336 GObjectClass *gobject_klass;
337 GstElementClass *gstelement_klass;
338 GstRtpSsrcDemuxClass *gstrtpssrcdemux_klass;
340 gobject_klass = (GObjectClass *) klass;
341 gstelement_klass = (GstElementClass *) klass;
342 gstrtpssrcdemux_klass = (GstRtpSsrcDemuxClass *) klass;
344 gobject_klass->dispose = gst_rtp_ssrc_demux_dispose;
345 gobject_klass->finalize = gst_rtp_ssrc_demux_finalize;
348 * GstRtpSsrcDemux::new-ssrc-pad:
349 * @demux: the object which received the signal
350 * @ssrc: the SSRC of the pad
353 * Emited when a new SSRC pad has been created.
355 gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD] =
356 g_signal_new ("new-ssrc-pad",
357 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
358 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, new_ssrc_pad),
359 NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE, 2, G_TYPE_UINT,
363 * GstRtpSsrcDemux::removed-ssrc-pad:
364 * @demux: the object which received the signal
365 * @ssrc: the SSRC of the pad
366 * @pad: the removed pad.
368 * Emited when a SSRC pad has been removed.
370 gst_rtp_ssrc_demux_signals[SIGNAL_REMOVED_SSRC_PAD] =
371 g_signal_new ("removed-ssrc-pad",
372 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
373 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, removed_ssrc_pad),
374 NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE, 2, G_TYPE_UINT,
378 * GstRtpSsrcDemux::clear-ssrc:
379 * @demux: the object which received the signal
380 * @ssrc: the SSRC of the pad
382 * Action signal to remove the pad for SSRC.
384 gst_rtp_ssrc_demux_signals[SIGNAL_CLEAR_SSRC] =
385 g_signal_new ("clear-ssrc",
386 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
387 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, clear_ssrc),
388 NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE, 1, G_TYPE_UINT);
390 gstelement_klass->change_state =
391 GST_DEBUG_FUNCPTR (gst_rtp_ssrc_demux_change_state);
392 gstrtpssrcdemux_klass->clear_ssrc =
393 GST_DEBUG_FUNCPTR (gst_rtp_ssrc_demux_clear_ssrc);
395 gst_element_class_add_static_pad_template (gstelement_klass,
396 &rtp_ssrc_demux_sink_template);
397 gst_element_class_add_static_pad_template (gstelement_klass,
398 &rtp_ssrc_demux_rtcp_sink_template);
399 gst_element_class_add_static_pad_template (gstelement_klass,
400 &rtp_ssrc_demux_src_template);
401 gst_element_class_add_static_pad_template (gstelement_klass,
402 &rtp_ssrc_demux_rtcp_src_template);
404 gst_element_class_set_static_metadata (gstelement_klass, "RTP SSRC Demux",
406 "Splits RTP streams based on the SSRC",
407 "Wim Taymans <wim.taymans@gmail.com>");
409 GST_DEBUG_CATEGORY_INIT (gst_rtp_ssrc_demux_debug,
410 "rtpssrcdemux", 0, "RTP SSRC demuxer");
414 gst_rtp_ssrc_demux_init (GstRtpSsrcDemux * demux)
416 GstElementClass *klass = GST_ELEMENT_GET_CLASS (demux);
419 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
421 gst_pad_set_chain_function (demux->rtp_sink, gst_rtp_ssrc_demux_chain);
422 gst_pad_set_event_function (demux->rtp_sink, gst_rtp_ssrc_demux_sink_event);
423 gst_pad_set_iterate_internal_links_function (demux->rtp_sink,
424 gst_rtp_ssrc_demux_iterate_internal_links_sink);
425 gst_element_add_pad (GST_ELEMENT_CAST (demux), demux->rtp_sink);
428 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
429 "rtcp_sink"), "rtcp_sink");
430 gst_pad_set_chain_function (demux->rtcp_sink, gst_rtp_ssrc_demux_rtcp_chain);
431 gst_pad_set_event_function (demux->rtcp_sink, gst_rtp_ssrc_demux_sink_event);
432 gst_pad_set_iterate_internal_links_function (demux->rtcp_sink,
433 gst_rtp_ssrc_demux_iterate_internal_links_sink);
434 gst_element_add_pad (GST_ELEMENT_CAST (demux), demux->rtcp_sink);
436 g_rec_mutex_init (&demux->padlock);
440 gst_rtp_ssrc_demux_reset (GstRtpSsrcDemux * demux)
444 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
445 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
447 gst_pad_set_active (dpad->rtp_pad, FALSE);
448 gst_pad_set_active (dpad->rtcp_pad, FALSE);
450 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtp_pad);
451 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtcp_pad);
454 g_slist_free (demux->srcpads);
455 demux->srcpads = NULL;
459 gst_rtp_ssrc_demux_dispose (GObject * object)
461 GstRtpSsrcDemux *demux;
463 demux = GST_RTP_SSRC_DEMUX (object);
465 gst_rtp_ssrc_demux_reset (demux);
467 G_OBJECT_CLASS (parent_class)->dispose (object);
471 gst_rtp_ssrc_demux_finalize (GObject * object)
473 GstRtpSsrcDemux *demux;
475 demux = GST_RTP_SSRC_DEMUX (object);
476 g_rec_mutex_clear (&demux->padlock);
478 G_OBJECT_CLASS (parent_class)->finalize (object);
482 gst_rtp_ssrc_demux_clear_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
484 GstRtpSsrcDemuxPad *dpad;
486 GST_PAD_LOCK (demux);
487 dpad = find_demux_pad_for_ssrc (demux, ssrc);
489 GST_PAD_UNLOCK (demux);
493 GST_DEBUG_OBJECT (demux, "clearing pad for SSRC %08x", ssrc);
495 demux->srcpads = g_slist_remove (demux->srcpads, dpad);
496 GST_PAD_UNLOCK (demux);
498 gst_pad_set_active (dpad->rtp_pad, FALSE);
499 gst_pad_set_active (dpad->rtcp_pad, FALSE);
501 g_signal_emit (G_OBJECT (demux),
502 gst_rtp_ssrc_demux_signals[SIGNAL_REMOVED_SSRC_PAD], 0, ssrc,
505 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtp_pad);
506 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtcp_pad);
515 GST_WARNING_OBJECT (demux, "unknown SSRC %08x", ssrc);
520 struct ForwardEventData
522 GstRtpSsrcDemux *demux;
529 forward_event (GstPad * pad, gpointer user_data)
531 struct ForwardEventData *fdata = user_data;
533 GstEvent *newevent = NULL;
535 GST_PAD_LOCK (fdata->demux);
536 for (walk = fdata->demux->srcpads; walk; walk = walk->next) {
537 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
539 if (pad == dpad->rtp_pad || pad == dpad->rtcp_pad) {
540 newevent = add_ssrc_and_ref (fdata->event, dpad->ssrc);
544 GST_PAD_UNLOCK (fdata->demux);
547 fdata->res &= gst_pad_push_event (pad, newevent);
554 gst_rtp_ssrc_demux_sink_event (GstPad * pad, GstObject * parent,
557 GstRtpSsrcDemux *demux;
558 struct ForwardEventData fdata;
560 demux = GST_RTP_SSRC_DEMUX (parent);
567 gst_pad_forward (pad, forward_event, &fdata);
569 gst_event_unref (event);
575 gst_rtp_ssrc_demux_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
578 GstRtpSsrcDemux *demux;
580 GstRTPBuffer rtp = { NULL };
582 GstRtpSsrcDemuxPad *dpad;
584 demux = GST_RTP_SSRC_DEMUX (parent);
586 if (!gst_rtp_buffer_map (buf, GST_MAP_READ, &rtp))
587 goto invalid_payload;
589 ssrc = gst_rtp_buffer_get_ssrc (&rtp);
590 gst_rtp_buffer_unmap (&rtp);
592 GST_DEBUG_OBJECT (demux, "received buffer of SSRC %08x", ssrc);
594 srcpad = find_or_create_demux_pad_for_ssrc (demux, ssrc, RTP_PAD);
599 ret = gst_pad_push (srcpad, buf);
601 if (ret != GST_FLOW_OK) {
602 /* check if the ssrc still there, may have been removed */
603 GST_PAD_LOCK (demux);
604 dpad = find_demux_pad_for_ssrc (demux, ssrc);
605 if (dpad == NULL || dpad->rtp_pad != srcpad) {
606 /* SSRC was removed during the push ... ignore the error */
609 GST_PAD_UNLOCK (demux);
612 gst_object_unref (srcpad);
619 /* this is fatal and should be filtered earlier */
620 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
621 ("Dropping invalid RTP payload"));
622 gst_buffer_unref (buf);
623 return GST_FLOW_ERROR;
627 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
628 ("Could not create new pad"));
629 gst_buffer_unref (buf);
630 return GST_FLOW_ERROR;
635 gst_rtp_ssrc_demux_rtcp_chain (GstPad * pad, GstObject * parent,
639 GstRtpSsrcDemux *demux;
641 GstRTCPPacket packet;
642 GstRTCPBuffer rtcp = { NULL, };
644 GstRtpSsrcDemuxPad *dpad;
646 demux = GST_RTP_SSRC_DEMUX (parent);
648 if (!gst_rtcp_buffer_validate_reduced (buf))
651 gst_rtcp_buffer_map (buf, GST_MAP_READ, &rtcp);
652 if (!gst_rtcp_buffer_get_first_packet (&rtcp, &packet)) {
653 gst_rtcp_buffer_unmap (&rtcp);
657 /* first packet must be SR or RR, or in case of a reduced size RTCP packet
658 * it must be APP, RTPFB or PSFB feeadback, or else the validate would
660 switch (gst_rtcp_packet_get_type (&packet)) {
661 case GST_RTCP_TYPE_SR:
662 /* get the ssrc so that we can route it to the right source pad */
663 gst_rtcp_packet_sr_get_sender_info (&packet, &ssrc, NULL, NULL, NULL,
666 case GST_RTCP_TYPE_RR:
667 ssrc = gst_rtcp_packet_rr_get_ssrc (&packet);
669 case GST_RTCP_TYPE_APP:
670 case GST_RTCP_TYPE_RTPFB:
671 case GST_RTCP_TYPE_PSFB:
672 ssrc = gst_rtcp_packet_fb_get_sender_ssrc (&packet);
675 goto unexpected_rtcp;
677 gst_rtcp_buffer_unmap (&rtcp);
679 GST_DEBUG_OBJECT (demux, "received RTCP of SSRC %08x", ssrc);
681 srcpad = find_or_create_demux_pad_for_ssrc (demux, ssrc, RTCP_PAD);
686 ret = gst_pad_push (srcpad, buf);
688 if (ret != GST_FLOW_OK) {
689 /* check if the ssrc still there, may have been removed */
690 GST_PAD_LOCK (demux);
691 dpad = find_demux_pad_for_ssrc (demux, ssrc);
692 if (dpad == NULL || dpad->rtcp_pad != srcpad) {
693 /* SSRC was removed during the push ... ignore the error */
696 GST_PAD_UNLOCK (demux);
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 /* 0 means equal means we accept the pad, accepted if there is a name
821 * and it starts with the prefix */
822 GST_OBJECT_LOCK (pad);
823 res = !GST_PAD_NAME (pad) || !g_str_has_prefix (GST_PAD_NAME (pad), prefix);
824 GST_OBJECT_UNLOCK (pad);
830 gst_rtp_ssrc_demux_iterate_internal_links_sink (GstPad * pad,
833 GstRtpSsrcDemux *demux;
834 GstIterator *it = NULL;
835 GValue gval = { 0, };
837 demux = GST_RTP_SSRC_DEMUX (parent);
839 g_value_init (&gval, G_TYPE_STRING);
840 if (pad == demux->rtp_sink)
841 g_value_set_static_string (&gval, "src_");
842 else if (pad == demux->rtcp_sink)
843 g_value_set_static_string (&gval, "rtcp_src_");
845 g_assert_not_reached ();
847 it = gst_element_iterate_src_pads (GST_ELEMENT_CAST (demux));
848 it = gst_iterator_filter (it, src_pad_compare_func, &gval);
855 gst_rtp_ssrc_demux_src_query (GstPad * pad, GstObject * parent,
858 GstRtpSsrcDemux *demux;
859 gboolean res = FALSE;
861 demux = GST_RTP_SSRC_DEMUX (parent);
863 switch (GST_QUERY_TYPE (query)) {
864 case GST_QUERY_LATENCY:
867 if ((res = gst_pad_peer_query (demux->rtp_sink, query))) {
869 GstClockTime min_latency, max_latency;
870 GstRtpSsrcDemuxPad *demuxpad;
872 demuxpad = gst_pad_get_element_private (pad);
874 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
876 GST_DEBUG_OBJECT (demux, "peer min latency %" GST_TIME_FORMAT,
877 GST_TIME_ARGS (min_latency));
879 GST_DEBUG_OBJECT (demux, "latency for SSRC %08x", demuxpad->ssrc);
881 gst_query_set_latency (query, live, min_latency, max_latency);
886 res = gst_pad_query_default (pad, parent, query);
893 static GstStateChangeReturn
894 gst_rtp_ssrc_demux_change_state (GstElement * element,
895 GstStateChange transition)
897 GstStateChangeReturn ret;
898 GstRtpSsrcDemux *demux;
900 demux = GST_RTP_SSRC_DEMUX (element);
902 switch (transition) {
903 case GST_STATE_CHANGE_NULL_TO_READY:
904 case GST_STATE_CHANGE_READY_TO_PAUSED:
905 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
910 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
912 switch (transition) {
913 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
915 case GST_STATE_CHANGE_PAUSED_TO_READY:
916 gst_rtp_ssrc_demux_reset (demux);
918 case GST_STATE_CHANGE_READY_TO_NULL: