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);
191 static GstRtpSsrcDemuxPad *
192 find_or_create_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
194 GstPad *rtp_pad, *rtcp_pad;
195 GstElementClass *klass;
196 GstPadTemplate *templ;
198 GstRtpSsrcDemuxPad *demuxpad;
201 GST_DEBUG_OBJECT (demux, "creating pad for SSRC %08x", ssrc);
203 demuxpad = find_demux_pad_for_ssrc (demux, ssrc);
204 if (demuxpad != NULL) {
208 klass = GST_ELEMENT_GET_CLASS (demux);
209 templ = gst_element_class_get_pad_template (klass, "src_%u");
210 padname = g_strdup_printf ("src_%u", ssrc);
211 rtp_pad = gst_pad_new_from_template (templ, padname);
214 templ = gst_element_class_get_pad_template (klass, "rtcp_src_%u");
215 padname = g_strdup_printf ("rtcp_src_%u", ssrc);
216 rtcp_pad = gst_pad_new_from_template (templ, padname);
219 /* wrap in structure and add to list */
220 demuxpad = g_new0 (GstRtpSsrcDemuxPad, 1);
221 demuxpad->ssrc = ssrc;
222 demuxpad->rtp_pad = rtp_pad;
223 demuxpad->rtcp_pad = rtcp_pad;
225 gst_pad_set_element_private (rtp_pad, demuxpad);
226 gst_pad_set_element_private (rtcp_pad, demuxpad);
228 demux->srcpads = g_slist_prepend (demux->srcpads, demuxpad);
230 gst_pad_set_query_function (rtp_pad, gst_rtp_ssrc_demux_src_query);
231 gst_pad_set_iterate_internal_links_function (rtp_pad,
232 gst_rtp_ssrc_demux_iterate_internal_links_src);
233 gst_pad_set_event_function (rtp_pad, gst_rtp_ssrc_demux_src_event);
234 gst_pad_use_fixed_caps (rtp_pad);
235 gst_pad_set_active (rtp_pad, TRUE);
237 gst_pad_set_event_function (rtcp_pad, gst_rtp_ssrc_demux_src_event);
238 gst_pad_set_iterate_internal_links_function (rtcp_pad,
239 gst_rtp_ssrc_demux_iterate_internal_links_src);
240 gst_pad_use_fixed_caps (rtcp_pad);
241 gst_pad_set_active (rtcp_pad, TRUE);
243 /* copy caps from input */
244 if ((caps = gst_pad_get_current_caps (demux->rtp_sink))) {
245 gst_pad_set_caps (rtp_pad, caps);
246 gst_caps_unref (caps);
248 if ((caps = gst_pad_get_current_caps (demux->rtcp_sink))) {
249 gst_pad_set_caps (rtcp_pad, caps);
250 gst_caps_unref (caps);
252 gst_element_add_pad (GST_ELEMENT_CAST (demux), rtp_pad);
253 gst_element_add_pad (GST_ELEMENT_CAST (demux), rtcp_pad);
255 g_signal_emit (G_OBJECT (demux),
256 gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD], 0, ssrc, rtp_pad);
262 gst_rtp_ssrc_demux_class_init (GstRtpSsrcDemuxClass * klass)
264 GObjectClass *gobject_klass;
265 GstElementClass *gstelement_klass;
266 GstRtpSsrcDemuxClass *gstrtpssrcdemux_klass;
268 gobject_klass = (GObjectClass *) klass;
269 gstelement_klass = (GstElementClass *) klass;
270 gstrtpssrcdemux_klass = (GstRtpSsrcDemuxClass *) klass;
272 gobject_klass->dispose = gst_rtp_ssrc_demux_dispose;
273 gobject_klass->finalize = gst_rtp_ssrc_demux_finalize;
276 * GstRtpSsrcDemux::new-ssrc-pad:
277 * @demux: the object which received the signal
278 * @ssrc: the SSRC of the pad
281 * Emited when a new SSRC pad has been created.
283 gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD] =
284 g_signal_new ("new-ssrc-pad",
285 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
286 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, new_ssrc_pad),
287 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_OBJECT,
288 G_TYPE_NONE, 2, G_TYPE_UINT, GST_TYPE_PAD);
291 * GstRtpSsrcDemux::removed-ssrc-pad:
292 * @demux: the object which received the signal
293 * @ssrc: the SSRC of the pad
294 * @pad: the removed pad.
296 * Emited when a SSRC pad has been removed.
298 gst_rtp_ssrc_demux_signals[SIGNAL_REMOVED_SSRC_PAD] =
299 g_signal_new ("removed-ssrc-pad",
300 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
301 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, removed_ssrc_pad),
302 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_OBJECT,
303 G_TYPE_NONE, 2, G_TYPE_UINT, GST_TYPE_PAD);
306 * GstRtpSsrcDemux::clear-ssrc:
307 * @demux: the object which received the signal
308 * @ssrc: the SSRC of the pad
310 * Action signal to remove the pad for SSRC.
312 gst_rtp_ssrc_demux_signals[SIGNAL_CLEAR_SSRC] =
313 g_signal_new ("clear-ssrc",
314 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
315 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, clear_ssrc),
316 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT, G_TYPE_NONE, 1, G_TYPE_UINT);
318 gstelement_klass->change_state =
319 GST_DEBUG_FUNCPTR (gst_rtp_ssrc_demux_change_state);
320 gstrtpssrcdemux_klass->clear_ssrc =
321 GST_DEBUG_FUNCPTR (gst_rtp_ssrc_demux_clear_ssrc);
323 gst_element_class_add_pad_template (gstelement_klass,
324 gst_static_pad_template_get (&rtp_ssrc_demux_sink_template));
325 gst_element_class_add_pad_template (gstelement_klass,
326 gst_static_pad_template_get (&rtp_ssrc_demux_rtcp_sink_template));
327 gst_element_class_add_pad_template (gstelement_klass,
328 gst_static_pad_template_get (&rtp_ssrc_demux_src_template));
329 gst_element_class_add_pad_template (gstelement_klass,
330 gst_static_pad_template_get (&rtp_ssrc_demux_rtcp_src_template));
332 gst_element_class_set_details_simple (gstelement_klass, "RTP SSRC Demux",
334 "Splits RTP streams based on the SSRC",
335 "Wim Taymans <wim.taymans@gmail.com>");
337 GST_DEBUG_CATEGORY_INIT (gst_rtp_ssrc_demux_debug,
338 "rtpssrcdemux", 0, "RTP SSRC demuxer");
342 gst_rtp_ssrc_demux_init (GstRtpSsrcDemux * demux)
344 GstElementClass *klass = GST_ELEMENT_GET_CLASS (demux);
347 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
349 gst_pad_set_chain_function (demux->rtp_sink, gst_rtp_ssrc_demux_chain);
350 gst_pad_set_event_function (demux->rtp_sink, gst_rtp_ssrc_demux_sink_event);
351 gst_pad_set_iterate_internal_links_function (demux->rtp_sink,
352 gst_rtp_ssrc_demux_iterate_internal_links_sink);
353 gst_element_add_pad (GST_ELEMENT_CAST (demux), demux->rtp_sink);
356 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
357 "rtcp_sink"), "rtcp_sink");
358 gst_pad_set_chain_function (demux->rtcp_sink, gst_rtp_ssrc_demux_rtcp_chain);
359 gst_pad_set_event_function (demux->rtcp_sink,
360 gst_rtp_ssrc_demux_rtcp_sink_event);
361 gst_pad_set_iterate_internal_links_function (demux->rtcp_sink,
362 gst_rtp_ssrc_demux_iterate_internal_links_sink);
363 gst_element_add_pad (GST_ELEMENT_CAST (demux), demux->rtcp_sink);
365 g_rec_mutex_init (&demux->padlock);
367 gst_segment_init (&demux->segment, GST_FORMAT_UNDEFINED);
371 gst_rtp_ssrc_demux_reset (GstRtpSsrcDemux * demux)
375 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
376 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
378 gst_pad_set_active (dpad->rtp_pad, FALSE);
379 gst_pad_set_active (dpad->rtcp_pad, FALSE);
381 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtp_pad);
382 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtcp_pad);
385 g_slist_free (demux->srcpads);
386 demux->srcpads = NULL;
390 gst_rtp_ssrc_demux_dispose (GObject * object)
392 GstRtpSsrcDemux *demux;
394 demux = GST_RTP_SSRC_DEMUX (object);
396 gst_rtp_ssrc_demux_reset (demux);
398 G_OBJECT_CLASS (parent_class)->dispose (object);
402 gst_rtp_ssrc_demux_finalize (GObject * object)
404 GstRtpSsrcDemux *demux;
406 demux = GST_RTP_SSRC_DEMUX (object);
407 g_rec_mutex_clear (&demux->padlock);
409 G_OBJECT_CLASS (parent_class)->finalize (object);
413 gst_rtp_ssrc_demux_clear_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
415 GstRtpSsrcDemuxPad *dpad;
417 GST_PAD_LOCK (demux);
418 dpad = find_demux_pad_for_ssrc (demux, ssrc);
420 GST_PAD_UNLOCK (demux);
424 GST_DEBUG_OBJECT (demux, "clearing pad for SSRC %08x", ssrc);
426 demux->srcpads = g_slist_remove (demux->srcpads, dpad);
427 GST_PAD_UNLOCK (demux);
429 gst_pad_set_active (dpad->rtp_pad, FALSE);
430 gst_pad_set_active (dpad->rtcp_pad, FALSE);
432 g_signal_emit (G_OBJECT (demux),
433 gst_rtp_ssrc_demux_signals[SIGNAL_REMOVED_SSRC_PAD], 0, ssrc,
436 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtp_pad);
437 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtcp_pad);
446 GST_WARNING_OBJECT (demux, "unknown SSRC %08x", ssrc);
452 gst_rtp_ssrc_demux_sink_event (GstPad * pad, GstObject * parent,
455 GstRtpSsrcDemux *demux;
456 gboolean res = FALSE;
458 demux = GST_RTP_SSRC_DEMUX (parent);
460 switch (GST_EVENT_TYPE (event)) {
461 case GST_EVENT_FLUSH_STOP:
462 gst_segment_init (&demux->segment, GST_FORMAT_UNDEFINED);
470 /* need local snapshot of pads;
471 * should not push downstream while holding lock as that might deadlock
472 * with stuff traveling upstream tyring to get this lock while holding
473 * other (stream)lock */
474 GST_PAD_LOCK (demux);
475 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
476 GstRtpSsrcDemuxPad *pad = (GstRtpSsrcDemuxPad *) walk->data;
478 pad = g_slice_dup (GstRtpSsrcDemuxPad, pad);
479 gst_object_ref (pad->rtp_pad);
481 pads = g_slist_prepend (pads, pad);
483 GST_PAD_UNLOCK (demux);
485 for (walk = pads; walk; walk = g_slist_next (walk)) {
486 GstRtpSsrcDemuxPad *dpad = walk->data;
489 newevent = add_ssrc_and_ref (event, dpad->ssrc);
491 res &= gst_pad_push_event (dpad->rtp_pad, newevent);
492 gst_object_unref (dpad->rtp_pad);
493 g_slice_free (GstRtpSsrcDemuxPad, dpad);
496 gst_event_unref (event);
505 gst_rtp_ssrc_demux_rtcp_sink_event (GstPad * pad, GstObject * parent,
508 GstRtpSsrcDemux *demux;
513 demux = GST_RTP_SSRC_DEMUX (parent);
515 GST_PAD_LOCK (demux);
516 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
517 GstRtpSsrcDemuxPad *pad = (GstRtpSsrcDemuxPad *) walk->data;
519 pad = g_slice_dup (GstRtpSsrcDemuxPad, pad);
520 gst_object_ref (pad->rtcp_pad);
522 pads = g_slist_prepend (pads, pad);
524 GST_PAD_UNLOCK (demux);
526 for (walk = pads; walk; walk = g_slist_next (walk)) {
527 GstRtpSsrcDemuxPad *dpad = walk->data;
530 newevent = add_ssrc_and_ref (event, dpad->ssrc);
532 res &= gst_pad_push_event (dpad->rtcp_pad, newevent);
533 gst_object_unref (dpad->rtcp_pad);
534 g_slice_free (GstRtpSsrcDemuxPad, dpad);
537 gst_event_unref (event);
543 gst_rtp_ssrc_demux_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
546 GstRtpSsrcDemux *demux;
548 GstRtpSsrcDemuxPad *dpad;
549 GstRTPBuffer rtp = { NULL };
552 demux = GST_RTP_SSRC_DEMUX (parent);
554 if (!gst_rtp_buffer_validate (buf))
555 goto invalid_payload;
557 gst_rtp_buffer_map (buf, GST_MAP_READ, &rtp);
558 ssrc = gst_rtp_buffer_get_ssrc (&rtp);
559 gst_rtp_buffer_unmap (&rtp);
561 GST_DEBUG_OBJECT (demux, "received buffer of SSRC %08x", ssrc);
563 GST_PAD_LOCK (demux);
564 dpad = find_or_create_demux_pad_for_ssrc (demux, ssrc);
566 GST_PAD_UNLOCK (demux);
569 srcpad = gst_object_ref (dpad->rtp_pad);
570 GST_PAD_UNLOCK (demux);
573 ret = gst_pad_push (srcpad, buf);
575 gst_object_unref (srcpad);
582 /* this is fatal and should be filtered earlier */
583 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
584 ("Dropping invalid RTP payload"));
585 gst_buffer_unref (buf);
586 return GST_FLOW_ERROR;
590 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
591 ("Could not create new pad"));
592 gst_buffer_unref (buf);
593 return GST_FLOW_ERROR;
598 gst_rtp_ssrc_demux_rtcp_chain (GstPad * pad, GstObject * parent,
602 GstRtpSsrcDemux *demux;
604 GstRtpSsrcDemuxPad *dpad;
605 GstRTCPPacket packet;
606 GstRTCPBuffer rtcp = { NULL, };
609 demux = GST_RTP_SSRC_DEMUX (parent);
611 if (!gst_rtcp_buffer_validate (buf))
614 gst_rtcp_buffer_map (buf, GST_MAP_READ, &rtcp);
615 if (!gst_rtcp_buffer_get_first_packet (&rtcp, &packet)) {
616 gst_rtcp_buffer_unmap (&rtcp);
620 /* first packet must be SR or RR or else the validate would have failed */
621 switch (gst_rtcp_packet_get_type (&packet)) {
622 case GST_RTCP_TYPE_SR:
623 /* get the ssrc so that we can route it to the right source pad */
624 gst_rtcp_packet_sr_get_sender_info (&packet, &ssrc, NULL, NULL, NULL,
628 goto unexpected_rtcp;
630 gst_rtcp_buffer_unmap (&rtcp);
632 GST_DEBUG_OBJECT (demux, "received RTCP of SSRC %08x", ssrc);
634 GST_PAD_LOCK (demux);
635 dpad = find_or_create_demux_pad_for_ssrc (demux, ssrc);
637 GST_PAD_UNLOCK (demux);
640 srcpad = gst_object_ref (dpad->rtcp_pad);
641 GST_PAD_UNLOCK (demux);
644 ret = gst_pad_push (srcpad, buf);
646 gst_object_unref (srcpad);
653 /* this is fatal and should be filtered earlier */
654 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
655 ("Dropping invalid RTCP packet"));
656 gst_buffer_unref (buf);
657 return GST_FLOW_ERROR;
661 GST_DEBUG_OBJECT (demux, "dropping unexpected RTCP packet");
662 gst_buffer_unref (buf);
667 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
668 ("Could not create new pad"));
669 gst_buffer_unref (buf);
670 return GST_FLOW_ERROR;
674 static GstRtpSsrcDemuxPad *
675 find_demux_pad_for_pad (GstRtpSsrcDemux * demux, GstPad * pad)
679 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
680 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
681 if (dpad->rtp_pad == pad || dpad->rtcp_pad == pad) {
691 gst_rtp_ssrc_demux_src_event (GstPad * pad, GstObject * parent,
694 GstRtpSsrcDemux *demux;
695 const GstStructure *s;
697 demux = GST_RTP_SSRC_DEMUX (parent);
699 switch (GST_EVENT_TYPE (event)) {
700 case GST_EVENT_CUSTOM_UPSTREAM:
701 case GST_EVENT_CUSTOM_BOTH:
702 case GST_EVENT_CUSTOM_BOTH_OOB:
703 s = gst_event_get_structure (event);
704 if (s && !gst_structure_has_field (s, "ssrc")) {
705 GstRtpSsrcDemuxPad *dpad = find_demux_pad_for_pad (demux, pad);
710 event = gst_event_make_writable (event);
711 ws = gst_event_writable_structure (event);
712 gst_structure_set (ws, "ssrc", G_TYPE_UINT, dpad->ssrc, NULL);
720 return gst_pad_event_default (pad, parent, event);
724 gst_rtp_ssrc_demux_iterate_internal_links_src (GstPad * pad, GstObject * parent)
726 GstRtpSsrcDemux *demux;
727 GstPad *otherpad = NULL;
728 GstIterator *it = NULL;
731 demux = GST_RTP_SSRC_DEMUX (parent);
733 GST_PAD_LOCK (demux);
734 for (current = demux->srcpads; current; current = g_slist_next (current)) {
735 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) current->data;
737 if (pad == dpad->rtp_pad) {
738 otherpad = demux->rtp_sink;
740 } else if (pad == dpad->rtcp_pad) {
741 otherpad = demux->rtcp_sink;
748 g_value_init (&val, GST_TYPE_PAD);
749 g_value_set_object (&val, otherpad);
750 it = gst_iterator_new_single (GST_TYPE_PAD, &val);
751 g_value_unset (&val);
754 GST_PAD_UNLOCK (demux);
759 /* Should return 0 for elements to be included */
761 src_pad_compare_func (gconstpointer a, gconstpointer b)
763 GstPad *pad = GST_PAD (g_value_get_object (a));
764 const gchar *prefix = g_value_get_string (b);
767 GST_OBJECT_LOCK (pad);
768 res = !GST_PAD_NAME (pad) || g_str_has_prefix (GST_PAD_NAME (pad), prefix);
769 GST_OBJECT_UNLOCK (pad);
775 gst_rtp_ssrc_demux_iterate_internal_links_sink (GstPad * pad,
778 GstRtpSsrcDemux *demux;
779 GstIterator *it = NULL;
780 GValue gval = { 0, };
782 demux = GST_RTP_SSRC_DEMUX (parent);
784 g_value_init (&gval, G_TYPE_STRING);
785 if (pad == demux->rtp_sink)
786 g_value_set_static_string (&gval, "src_");
787 else if (pad == demux->rtcp_sink)
788 g_value_set_static_string (&gval, "rtcp_src_");
790 g_assert_not_reached ();
792 it = gst_element_iterate_src_pads (GST_ELEMENT_CAST (demux));
793 it = gst_iterator_filter (it, src_pad_compare_func, &gval);
800 gst_rtp_ssrc_demux_src_query (GstPad * pad, GstObject * parent,
803 GstRtpSsrcDemux *demux;
804 gboolean res = FALSE;
806 demux = GST_RTP_SSRC_DEMUX (parent);
808 switch (GST_QUERY_TYPE (query)) {
809 case GST_QUERY_LATENCY:
812 if ((res = gst_pad_peer_query (demux->rtp_sink, query))) {
814 GstClockTime min_latency, max_latency;
815 GstRtpSsrcDemuxPad *demuxpad;
817 demuxpad = gst_pad_get_element_private (pad);
819 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
821 GST_DEBUG_OBJECT (demux, "peer min latency %" GST_TIME_FORMAT,
822 GST_TIME_ARGS (min_latency));
824 GST_DEBUG_OBJECT (demux, "latency for SSRC %08x", demuxpad->ssrc);
826 gst_query_set_latency (query, live, min_latency, max_latency);
831 res = gst_pad_query_default (pad, parent, query);
838 static GstStateChangeReturn
839 gst_rtp_ssrc_demux_change_state (GstElement * element,
840 GstStateChange transition)
842 GstStateChangeReturn ret;
843 GstRtpSsrcDemux *demux;
845 demux = GST_RTP_SSRC_DEMUX (element);
847 switch (transition) {
848 case GST_STATE_CHANGE_NULL_TO_READY:
849 case GST_STATE_CHANGE_READY_TO_PAUSED:
850 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
855 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
857 switch (transition) {
858 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
860 case GST_STATE_CHANGE_PAUSED_TO_READY:
861 gst_rtp_ssrc_demux_reset (demux);
863 case GST_STATE_CHANGE_READY_TO_NULL: