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))
93 SIGNAL_REMOVED_SSRC_PAD,
98 #define gst_rtp_ssrc_demux_parent_class parent_class
99 G_DEFINE_TYPE (GstRtpSsrcDemux, gst_rtp_ssrc_demux, GST_TYPE_ELEMENT);
101 /* GObject vmethods */
102 static void gst_rtp_ssrc_demux_dispose (GObject * object);
103 static void gst_rtp_ssrc_demux_finalize (GObject * object);
105 /* GstElement vmethods */
106 static GstStateChangeReturn gst_rtp_ssrc_demux_change_state (GstElement *
107 element, GstStateChange transition);
109 static void gst_rtp_ssrc_demux_clear_ssrc (GstRtpSsrcDemux * demux,
113 static GstFlowReturn gst_rtp_ssrc_demux_chain (GstPad * pad, GstObject * parent,
115 static gboolean gst_rtp_ssrc_demux_sink_event (GstPad * pad, GstObject * parent,
118 static GstFlowReturn gst_rtp_ssrc_demux_rtcp_chain (GstPad * pad,
119 GstObject * parent, GstBuffer * buf);
120 static gboolean gst_rtp_ssrc_demux_rtcp_sink_event (GstPad * pad,
121 GstObject * parent, GstEvent * event);
122 static GstIterator *gst_rtp_ssrc_demux_iterate_internal_links_sink (GstPad *
123 pad, GstObject * parent);
126 static gboolean gst_rtp_ssrc_demux_src_event (GstPad * pad, GstObject * parent,
128 static GstIterator *gst_rtp_ssrc_demux_iterate_internal_links_src (GstPad * pad,
130 static gboolean gst_rtp_ssrc_demux_src_query (GstPad * pad, GstObject * parent,
133 static guint gst_rtp_ssrc_demux_signals[LAST_SIGNAL] = { 0 };
136 * Item for storing GstPad <-> SSRC pairs.
138 struct _GstRtpSsrcDemuxPad
146 /* find a src pad for a given SSRC, returns NULL if the SSRC was not found
148 static GstRtpSsrcDemuxPad *
149 find_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
153 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
154 GstRtpSsrcDemuxPad *pad = (GstRtpSsrcDemuxPad *) walk->data;
156 if (pad->ssrc == ssrc)
163 add_ssrc_and_ref (GstEvent * event, guint32 ssrc)
165 /* Set the ssrc on the output caps */
166 switch (GST_EVENT_TYPE (event)) {
173 gst_event_parse_caps (event, &caps);
174 newcaps = gst_caps_copy (caps);
176 s = gst_caps_get_structure (newcaps, 0);
177 gst_structure_set (s, "ssrc", G_TYPE_UINT, ssrc, NULL);
178 event = gst_event_new_caps (newcaps);
179 gst_caps_unref (newcaps);
183 gst_event_ref (event);
190 struct ForwardEventData
197 forward_sticky_events (GstPad * pad, GstEvent ** event, gpointer user_data)
199 struct ForwardEventData *data = user_data;
202 newevent = add_ssrc_and_ref (*event, data->ssrc);
204 gst_pad_push_event (data->pad, newevent);
211 static GstRtpSsrcDemuxPad *
212 find_or_create_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
214 GstPad *rtp_pad, *rtcp_pad;
215 GstElementClass *klass;
216 GstPadTemplate *templ;
218 GstRtpSsrcDemuxPad *demuxpad;
220 struct ForwardEventData fdata;
222 GST_DEBUG_OBJECT (demux, "creating pad for SSRC %08x", ssrc);
224 demuxpad = find_demux_pad_for_ssrc (demux, ssrc);
225 if (demuxpad != NULL) {
229 klass = GST_ELEMENT_GET_CLASS (demux);
230 templ = gst_element_class_get_pad_template (klass, "src_%u");
231 padname = g_strdup_printf ("src_%u", ssrc);
232 rtp_pad = gst_pad_new_from_template (templ, padname);
235 templ = gst_element_class_get_pad_template (klass, "rtcp_src_%u");
236 padname = g_strdup_printf ("rtcp_src_%u", ssrc);
237 rtcp_pad = gst_pad_new_from_template (templ, padname);
240 /* wrap in structure and add to list */
241 demuxpad = g_new0 (GstRtpSsrcDemuxPad, 1);
242 demuxpad->ssrc = ssrc;
243 demuxpad->rtp_pad = rtp_pad;
244 demuxpad->rtcp_pad = rtcp_pad;
248 gst_pad_set_element_private (rtp_pad, demuxpad);
249 gst_pad_set_element_private (rtcp_pad, demuxpad);
251 demux->srcpads = g_slist_prepend (demux->srcpads, demuxpad);
253 gst_pad_set_query_function (rtp_pad, gst_rtp_ssrc_demux_src_query);
254 gst_pad_set_iterate_internal_links_function (rtp_pad,
255 gst_rtp_ssrc_demux_iterate_internal_links_src);
256 gst_pad_set_event_function (rtp_pad, gst_rtp_ssrc_demux_src_event);
257 gst_pad_use_fixed_caps (rtp_pad);
258 gst_pad_set_active (rtp_pad, TRUE);
260 gst_pad_sticky_events_foreach (demux->rtp_sink, forward_sticky_events,
263 gst_pad_set_event_function (rtcp_pad, gst_rtp_ssrc_demux_src_event);
264 gst_pad_set_iterate_internal_links_function (rtcp_pad,
265 gst_rtp_ssrc_demux_iterate_internal_links_src);
266 gst_pad_use_fixed_caps (rtcp_pad);
267 gst_pad_set_active (rtcp_pad, TRUE);
268 fdata.pad = rtcp_pad;
269 gst_pad_sticky_events_foreach (demux->rtcp_sink, forward_sticky_events,
272 /* copy caps from input */
273 if ((caps = gst_pad_get_current_caps (demux->rtp_sink))) {
274 gst_pad_set_caps (rtp_pad, caps);
275 gst_caps_unref (caps);
277 if ((caps = gst_pad_get_current_caps (demux->rtcp_sink))) {
278 gst_pad_set_caps (rtcp_pad, caps);
279 gst_caps_unref (caps);
281 gst_element_add_pad (GST_ELEMENT_CAST (demux), rtp_pad);
282 gst_element_add_pad (GST_ELEMENT_CAST (demux), rtcp_pad);
284 g_signal_emit (G_OBJECT (demux),
285 gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD], 0, ssrc, rtp_pad);
291 gst_rtp_ssrc_demux_class_init (GstRtpSsrcDemuxClass * klass)
293 GObjectClass *gobject_klass;
294 GstElementClass *gstelement_klass;
295 GstRtpSsrcDemuxClass *gstrtpssrcdemux_klass;
297 gobject_klass = (GObjectClass *) klass;
298 gstelement_klass = (GstElementClass *) klass;
299 gstrtpssrcdemux_klass = (GstRtpSsrcDemuxClass *) klass;
301 gobject_klass->dispose = gst_rtp_ssrc_demux_dispose;
302 gobject_klass->finalize = gst_rtp_ssrc_demux_finalize;
305 * GstRtpSsrcDemux::new-ssrc-pad:
306 * @demux: the object which received the signal
307 * @ssrc: the SSRC of the pad
310 * Emited when a new SSRC pad has been created.
312 gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD] =
313 g_signal_new ("new-ssrc-pad",
314 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
315 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, new_ssrc_pad),
316 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_OBJECT,
317 G_TYPE_NONE, 2, G_TYPE_UINT, GST_TYPE_PAD);
320 * GstRtpSsrcDemux::removed-ssrc-pad:
321 * @demux: the object which received the signal
322 * @ssrc: the SSRC of the pad
323 * @pad: the removed pad.
325 * Emited when a SSRC pad has been removed.
327 gst_rtp_ssrc_demux_signals[SIGNAL_REMOVED_SSRC_PAD] =
328 g_signal_new ("removed-ssrc-pad",
329 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
330 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, removed_ssrc_pad),
331 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_OBJECT,
332 G_TYPE_NONE, 2, G_TYPE_UINT, GST_TYPE_PAD);
335 * GstRtpSsrcDemux::clear-ssrc:
336 * @demux: the object which received the signal
337 * @ssrc: the SSRC of the pad
339 * Action signal to remove the pad for SSRC.
341 gst_rtp_ssrc_demux_signals[SIGNAL_CLEAR_SSRC] =
342 g_signal_new ("clear-ssrc",
343 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
344 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, clear_ssrc),
345 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT, G_TYPE_NONE, 1, G_TYPE_UINT);
347 gstelement_klass->change_state =
348 GST_DEBUG_FUNCPTR (gst_rtp_ssrc_demux_change_state);
349 gstrtpssrcdemux_klass->clear_ssrc =
350 GST_DEBUG_FUNCPTR (gst_rtp_ssrc_demux_clear_ssrc);
352 gst_element_class_add_pad_template (gstelement_klass,
353 gst_static_pad_template_get (&rtp_ssrc_demux_sink_template));
354 gst_element_class_add_pad_template (gstelement_klass,
355 gst_static_pad_template_get (&rtp_ssrc_demux_rtcp_sink_template));
356 gst_element_class_add_pad_template (gstelement_klass,
357 gst_static_pad_template_get (&rtp_ssrc_demux_src_template));
358 gst_element_class_add_pad_template (gstelement_klass,
359 gst_static_pad_template_get (&rtp_ssrc_demux_rtcp_src_template));
361 gst_element_class_set_details_simple (gstelement_klass, "RTP SSRC Demux",
363 "Splits RTP streams based on the SSRC",
364 "Wim Taymans <wim.taymans@gmail.com>");
366 GST_DEBUG_CATEGORY_INIT (gst_rtp_ssrc_demux_debug,
367 "rtpssrcdemux", 0, "RTP SSRC demuxer");
371 gst_rtp_ssrc_demux_init (GstRtpSsrcDemux * demux)
373 GstElementClass *klass = GST_ELEMENT_GET_CLASS (demux);
376 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
378 gst_pad_set_chain_function (demux->rtp_sink, gst_rtp_ssrc_demux_chain);
379 gst_pad_set_event_function (demux->rtp_sink, gst_rtp_ssrc_demux_sink_event);
380 gst_pad_set_iterate_internal_links_function (demux->rtp_sink,
381 gst_rtp_ssrc_demux_iterate_internal_links_sink);
382 gst_element_add_pad (GST_ELEMENT_CAST (demux), demux->rtp_sink);
385 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
386 "rtcp_sink"), "rtcp_sink");
387 gst_pad_set_chain_function (demux->rtcp_sink, gst_rtp_ssrc_demux_rtcp_chain);
388 gst_pad_set_event_function (demux->rtcp_sink,
389 gst_rtp_ssrc_demux_rtcp_sink_event);
390 gst_pad_set_iterate_internal_links_function (demux->rtcp_sink,
391 gst_rtp_ssrc_demux_iterate_internal_links_sink);
392 gst_element_add_pad (GST_ELEMENT_CAST (demux), demux->rtcp_sink);
394 g_rec_mutex_init (&demux->padlock);
396 gst_segment_init (&demux->segment, GST_FORMAT_UNDEFINED);
400 gst_rtp_ssrc_demux_reset (GstRtpSsrcDemux * demux)
404 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
405 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
407 gst_pad_set_active (dpad->rtp_pad, FALSE);
408 gst_pad_set_active (dpad->rtcp_pad, FALSE);
410 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtp_pad);
411 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtcp_pad);
414 g_slist_free (demux->srcpads);
415 demux->srcpads = NULL;
419 gst_rtp_ssrc_demux_dispose (GObject * object)
421 GstRtpSsrcDemux *demux;
423 demux = GST_RTP_SSRC_DEMUX (object);
425 gst_rtp_ssrc_demux_reset (demux);
427 G_OBJECT_CLASS (parent_class)->dispose (object);
431 gst_rtp_ssrc_demux_finalize (GObject * object)
433 GstRtpSsrcDemux *demux;
435 demux = GST_RTP_SSRC_DEMUX (object);
436 g_rec_mutex_clear (&demux->padlock);
438 G_OBJECT_CLASS (parent_class)->finalize (object);
442 gst_rtp_ssrc_demux_clear_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
444 GstRtpSsrcDemuxPad *dpad;
446 GST_PAD_LOCK (demux);
447 dpad = find_demux_pad_for_ssrc (demux, ssrc);
449 GST_PAD_UNLOCK (demux);
453 GST_DEBUG_OBJECT (demux, "clearing pad for SSRC %08x", ssrc);
455 demux->srcpads = g_slist_remove (demux->srcpads, dpad);
456 GST_PAD_UNLOCK (demux);
458 gst_pad_set_active (dpad->rtp_pad, FALSE);
459 gst_pad_set_active (dpad->rtcp_pad, FALSE);
461 g_signal_emit (G_OBJECT (demux),
462 gst_rtp_ssrc_demux_signals[SIGNAL_REMOVED_SSRC_PAD], 0, ssrc,
465 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtp_pad);
466 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtcp_pad);
475 GST_WARNING_OBJECT (demux, "unknown SSRC %08x", ssrc);
481 gst_rtp_ssrc_demux_sink_event (GstPad * pad, GstObject * parent,
484 GstRtpSsrcDemux *demux;
485 gboolean res = FALSE;
487 demux = GST_RTP_SSRC_DEMUX (parent);
489 switch (GST_EVENT_TYPE (event)) {
490 case GST_EVENT_FLUSH_STOP:
491 gst_segment_init (&demux->segment, GST_FORMAT_UNDEFINED);
499 /* need local snapshot of pads;
500 * should not push downstream while holding lock as that might deadlock
501 * with stuff traveling upstream tyring to get this lock while holding
502 * other (stream)lock */
503 GST_PAD_LOCK (demux);
504 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
505 GstRtpSsrcDemuxPad *pad = (GstRtpSsrcDemuxPad *) walk->data;
507 pad = g_slice_dup (GstRtpSsrcDemuxPad, pad);
508 gst_object_ref (pad->rtp_pad);
510 pads = g_slist_prepend (pads, pad);
512 GST_PAD_UNLOCK (demux);
514 for (walk = pads; walk; walk = g_slist_next (walk)) {
515 GstRtpSsrcDemuxPad *dpad = walk->data;
518 newevent = add_ssrc_and_ref (event, dpad->ssrc);
520 res &= gst_pad_push_event (dpad->rtp_pad, newevent);
521 gst_object_unref (dpad->rtp_pad);
522 g_slice_free (GstRtpSsrcDemuxPad, dpad);
525 gst_event_unref (event);
534 gst_rtp_ssrc_demux_rtcp_sink_event (GstPad * pad, GstObject * parent,
537 GstRtpSsrcDemux *demux;
542 demux = GST_RTP_SSRC_DEMUX (parent);
544 GST_PAD_LOCK (demux);
545 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
546 GstRtpSsrcDemuxPad *pad = (GstRtpSsrcDemuxPad *) walk->data;
548 pad = g_slice_dup (GstRtpSsrcDemuxPad, pad);
549 gst_object_ref (pad->rtcp_pad);
551 pads = g_slist_prepend (pads, pad);
553 GST_PAD_UNLOCK (demux);
555 for (walk = pads; walk; walk = g_slist_next (walk)) {
556 GstRtpSsrcDemuxPad *dpad = walk->data;
559 newevent = add_ssrc_and_ref (event, dpad->ssrc);
561 res &= gst_pad_push_event (dpad->rtcp_pad, newevent);
562 gst_object_unref (dpad->rtcp_pad);
563 g_slice_free (GstRtpSsrcDemuxPad, dpad);
566 gst_event_unref (event);
572 gst_rtp_ssrc_demux_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
575 GstRtpSsrcDemux *demux;
577 GstRtpSsrcDemuxPad *dpad;
578 GstRTPBuffer rtp = { NULL };
581 demux = GST_RTP_SSRC_DEMUX (parent);
583 if (!gst_rtp_buffer_validate (buf))
584 goto invalid_payload;
586 gst_rtp_buffer_map (buf, GST_MAP_READ, &rtp);
587 ssrc = gst_rtp_buffer_get_ssrc (&rtp);
588 gst_rtp_buffer_unmap (&rtp);
590 GST_DEBUG_OBJECT (demux, "received buffer of SSRC %08x", ssrc);
592 GST_PAD_LOCK (demux);
593 dpad = find_or_create_demux_pad_for_ssrc (demux, ssrc);
595 GST_PAD_UNLOCK (demux);
598 srcpad = gst_object_ref (dpad->rtp_pad);
599 GST_PAD_UNLOCK (demux);
602 ret = gst_pad_push (srcpad, buf);
604 gst_object_unref (srcpad);
611 /* this is fatal and should be filtered earlier */
612 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
613 ("Dropping invalid RTP payload"));
614 gst_buffer_unref (buf);
615 return GST_FLOW_ERROR;
619 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
620 ("Could not create new pad"));
621 gst_buffer_unref (buf);
622 return GST_FLOW_ERROR;
627 gst_rtp_ssrc_demux_rtcp_chain (GstPad * pad, GstObject * parent,
631 GstRtpSsrcDemux *demux;
633 GstRtpSsrcDemuxPad *dpad;
634 GstRTCPPacket packet;
635 GstRTCPBuffer rtcp = { NULL, };
638 demux = GST_RTP_SSRC_DEMUX (parent);
640 if (!gst_rtcp_buffer_validate (buf))
643 gst_rtcp_buffer_map (buf, GST_MAP_READ, &rtcp);
644 if (!gst_rtcp_buffer_get_first_packet (&rtcp, &packet)) {
645 gst_rtcp_buffer_unmap (&rtcp);
649 /* first packet must be SR or RR or else the validate would have failed */
650 switch (gst_rtcp_packet_get_type (&packet)) {
651 case GST_RTCP_TYPE_SR:
652 /* get the ssrc so that we can route it to the right source pad */
653 gst_rtcp_packet_sr_get_sender_info (&packet, &ssrc, NULL, NULL, NULL,
657 goto unexpected_rtcp;
659 gst_rtcp_buffer_unmap (&rtcp);
661 GST_DEBUG_OBJECT (demux, "received RTCP of SSRC %08x", ssrc);
663 GST_PAD_LOCK (demux);
664 dpad = find_or_create_demux_pad_for_ssrc (demux, ssrc);
666 GST_PAD_UNLOCK (demux);
669 srcpad = gst_object_ref (dpad->rtcp_pad);
670 GST_PAD_UNLOCK (demux);
673 ret = gst_pad_push (srcpad, buf);
675 gst_object_unref (srcpad);
682 /* this is fatal and should be filtered earlier */
683 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
684 ("Dropping invalid RTCP packet"));
685 gst_buffer_unref (buf);
686 return GST_FLOW_ERROR;
690 GST_DEBUG_OBJECT (demux, "dropping unexpected RTCP packet");
691 gst_buffer_unref (buf);
696 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
697 ("Could not create new pad"));
698 gst_buffer_unref (buf);
699 return GST_FLOW_ERROR;
703 static GstRtpSsrcDemuxPad *
704 find_demux_pad_for_pad (GstRtpSsrcDemux * demux, GstPad * pad)
708 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
709 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
710 if (dpad->rtp_pad == pad || dpad->rtcp_pad == pad) {
720 gst_rtp_ssrc_demux_src_event (GstPad * pad, GstObject * parent,
723 GstRtpSsrcDemux *demux;
724 const GstStructure *s;
726 demux = GST_RTP_SSRC_DEMUX (parent);
728 switch (GST_EVENT_TYPE (event)) {
729 case GST_EVENT_CUSTOM_UPSTREAM:
730 case GST_EVENT_CUSTOM_BOTH:
731 case GST_EVENT_CUSTOM_BOTH_OOB:
732 s = gst_event_get_structure (event);
733 if (s && !gst_structure_has_field (s, "ssrc")) {
734 GstRtpSsrcDemuxPad *dpad = find_demux_pad_for_pad (demux, pad);
739 event = gst_event_make_writable (event);
740 ws = gst_event_writable_structure (event);
741 gst_structure_set (ws, "ssrc", G_TYPE_UINT, dpad->ssrc, NULL);
749 return gst_pad_event_default (pad, parent, event);
753 gst_rtp_ssrc_demux_iterate_internal_links_src (GstPad * pad, GstObject * parent)
755 GstRtpSsrcDemux *demux;
756 GstPad *otherpad = NULL;
757 GstIterator *it = NULL;
760 demux = GST_RTP_SSRC_DEMUX (parent);
762 GST_PAD_LOCK (demux);
763 for (current = demux->srcpads; current; current = g_slist_next (current)) {
764 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) current->data;
766 if (pad == dpad->rtp_pad) {
767 otherpad = demux->rtp_sink;
769 } else if (pad == dpad->rtcp_pad) {
770 otherpad = demux->rtcp_sink;
777 g_value_init (&val, GST_TYPE_PAD);
778 g_value_set_object (&val, otherpad);
779 it = gst_iterator_new_single (GST_TYPE_PAD, &val);
780 g_value_unset (&val);
783 GST_PAD_UNLOCK (demux);
788 /* Should return 0 for elements to be included */
790 src_pad_compare_func (gconstpointer a, gconstpointer b)
792 GstPad *pad = GST_PAD (g_value_get_object (a));
793 const gchar *prefix = g_value_get_string (b);
796 GST_OBJECT_LOCK (pad);
797 res = !GST_PAD_NAME (pad) || g_str_has_prefix (GST_PAD_NAME (pad), prefix);
798 GST_OBJECT_UNLOCK (pad);
804 gst_rtp_ssrc_demux_iterate_internal_links_sink (GstPad * pad,
807 GstRtpSsrcDemux *demux;
808 GstIterator *it = NULL;
809 GValue gval = { 0, };
811 demux = GST_RTP_SSRC_DEMUX (parent);
813 g_value_init (&gval, G_TYPE_STRING);
814 if (pad == demux->rtp_sink)
815 g_value_set_static_string (&gval, "src_");
816 else if (pad == demux->rtcp_sink)
817 g_value_set_static_string (&gval, "rtcp_src_");
819 g_assert_not_reached ();
821 it = gst_element_iterate_src_pads (GST_ELEMENT_CAST (demux));
822 it = gst_iterator_filter (it, src_pad_compare_func, &gval);
829 gst_rtp_ssrc_demux_src_query (GstPad * pad, GstObject * parent,
832 GstRtpSsrcDemux *demux;
833 gboolean res = FALSE;
835 demux = GST_RTP_SSRC_DEMUX (parent);
837 switch (GST_QUERY_TYPE (query)) {
838 case GST_QUERY_LATENCY:
841 if ((res = gst_pad_peer_query (demux->rtp_sink, query))) {
843 GstClockTime min_latency, max_latency;
844 GstRtpSsrcDemuxPad *demuxpad;
846 demuxpad = gst_pad_get_element_private (pad);
848 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
850 GST_DEBUG_OBJECT (demux, "peer min latency %" GST_TIME_FORMAT,
851 GST_TIME_ARGS (min_latency));
853 GST_DEBUG_OBJECT (demux, "latency for SSRC %08x", demuxpad->ssrc);
855 gst_query_set_latency (query, live, min_latency, max_latency);
860 res = gst_pad_query_default (pad, parent, query);
867 static GstStateChangeReturn
868 gst_rtp_ssrc_demux_change_state (GstElement * element,
869 GstStateChange transition)
871 GstStateChangeReturn ret;
872 GstRtpSsrcDemux *demux;
874 demux = GST_RTP_SSRC_DEMUX (element);
876 switch (transition) {
877 case GST_STATE_CHANGE_NULL_TO_READY:
878 case GST_STATE_CHANGE_READY_TO_PAUSED:
879 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
884 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
886 switch (transition) {
887 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
889 case GST_STATE_CHANGE_PAUSED_TO_READY:
890 gst_rtp_ssrc_demux_reset (demux);
892 case GST_STATE_CHANGE_READY_TO_NULL: