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_%d",
76 GST_STATIC_CAPS ("application/x-rtp")
79 static GstStaticPadTemplate rtp_ssrc_demux_rtcp_src_template =
80 GST_STATIC_PAD_TEMPLATE ("rtcp_src_%d",
83 GST_STATIC_CAPS ("application/x-rtcp")
86 #define GST_PAD_LOCK(obj) (g_static_rec_mutex_lock (&(obj)->padlock))
87 #define GST_PAD_UNLOCK(obj) (g_static_rec_mutex_unlock (&(obj)->padlock))
93 SIGNAL_REMOVED_SSRC_PAD,
98 GST_BOILERPLATE (GstRtpSsrcDemux, gst_rtp_ssrc_demux, GstElement,
102 /* GObject vmethods */
103 static void gst_rtp_ssrc_demux_dispose (GObject * object);
104 static void gst_rtp_ssrc_demux_finalize (GObject * object);
106 /* GstElement vmethods */
107 static GstStateChangeReturn gst_rtp_ssrc_demux_change_state (GstElement *
108 element, GstStateChange transition);
110 static void gst_rtp_ssrc_demux_clear_ssrc (GstRtpSsrcDemux * demux,
114 static GstFlowReturn gst_rtp_ssrc_demux_chain (GstPad * pad, GstBuffer * buf);
115 static gboolean gst_rtp_ssrc_demux_sink_event (GstPad * pad, GstEvent * event);
117 static GstFlowReturn gst_rtp_ssrc_demux_rtcp_chain (GstPad * pad,
119 static gboolean gst_rtp_ssrc_demux_rtcp_sink_event (GstPad * pad,
121 static GstIterator *gst_rtp_ssrc_demux_iterate_internal_links_sink (GstPad *
125 static gboolean gst_rtp_ssrc_demux_src_event (GstPad * pad, GstEvent * event);
126 static GstIterator *gst_rtp_ssrc_demux_iterate_internal_links_src (GstPad *
128 static gboolean gst_rtp_ssrc_demux_src_query (GstPad * pad, GstQuery * query);
130 static guint gst_rtp_ssrc_demux_signals[LAST_SIGNAL] = { 0 };
133 * Item for storing GstPad <-> SSRC pairs.
135 struct _GstRtpSsrcDemuxPad
143 /* find a src pad for a given SSRC, returns NULL if the SSRC was not found
145 static GstRtpSsrcDemuxPad *
146 find_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
150 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
151 GstRtpSsrcDemuxPad *pad = (GstRtpSsrcDemuxPad *) walk->data;
153 if (pad->ssrc == ssrc)
160 static GstRtpSsrcDemuxPad *
161 find_or_create_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
163 GstPad *rtp_pad, *rtcp_pad;
164 GstElementClass *klass;
165 GstPadTemplate *templ;
167 GstRtpSsrcDemuxPad *demuxpad;
169 GST_DEBUG_OBJECT (demux, "creating pad for SSRC %08x", ssrc);
171 demuxpad = find_demux_pad_for_ssrc (demux, ssrc);
172 if (demuxpad != NULL) {
176 klass = GST_ELEMENT_GET_CLASS (demux);
177 templ = gst_element_class_get_pad_template (klass, "src_%d");
178 padname = g_strdup_printf ("src_%d", ssrc);
179 rtp_pad = gst_pad_new_from_template (templ, padname);
182 templ = gst_element_class_get_pad_template (klass, "rtcp_src_%d");
183 padname = g_strdup_printf ("rtcp_src_%d", ssrc);
184 rtcp_pad = gst_pad_new_from_template (templ, padname);
187 /* wrap in structure and add to list */
188 demuxpad = g_new0 (GstRtpSsrcDemuxPad, 1);
189 demuxpad->ssrc = ssrc;
190 demuxpad->rtp_pad = rtp_pad;
191 demuxpad->rtcp_pad = rtcp_pad;
193 gst_pad_set_element_private (rtp_pad, demuxpad);
194 gst_pad_set_element_private (rtcp_pad, demuxpad);
196 demux->srcpads = g_slist_prepend (demux->srcpads, demuxpad);
198 /* copy caps from input */
199 gst_pad_set_caps (rtp_pad, GST_PAD_CAPS (demux->rtp_sink));
200 gst_pad_use_fixed_caps (rtp_pad);
201 gst_pad_set_caps (rtcp_pad, GST_PAD_CAPS (demux->rtcp_sink));
202 gst_pad_use_fixed_caps (rtcp_pad);
204 gst_pad_set_event_function (rtp_pad, gst_rtp_ssrc_demux_src_event);
205 gst_pad_set_query_function (rtp_pad, gst_rtp_ssrc_demux_src_query);
206 gst_pad_set_iterate_internal_links_function (rtp_pad,
207 gst_rtp_ssrc_demux_iterate_internal_links_src);
208 gst_pad_set_active (rtp_pad, TRUE);
210 gst_pad_set_event_function (rtcp_pad, gst_rtp_ssrc_demux_src_event);
211 gst_pad_set_iterate_internal_links_function (rtcp_pad,
212 gst_rtp_ssrc_demux_iterate_internal_links_src);
213 gst_pad_set_active (rtcp_pad, TRUE);
215 gst_element_add_pad (GST_ELEMENT_CAST (demux), rtp_pad);
216 gst_element_add_pad (GST_ELEMENT_CAST (demux), rtcp_pad);
218 g_signal_emit (G_OBJECT (demux),
219 gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD], 0, ssrc, rtp_pad);
225 gst_rtp_ssrc_demux_base_init (gpointer g_class)
227 GstElementClass *gstelement_klass = GST_ELEMENT_CLASS (g_class);
229 gst_element_class_add_static_pad_template (gstelement_klass,
230 &rtp_ssrc_demux_sink_template);
231 gst_element_class_add_static_pad_template (gstelement_klass,
232 &rtp_ssrc_demux_rtcp_sink_template);
233 gst_element_class_add_static_pad_template (gstelement_klass,
234 &rtp_ssrc_demux_src_template);
235 gst_element_class_add_static_pad_template (gstelement_klass,
236 &rtp_ssrc_demux_rtcp_src_template);
238 gst_element_class_set_details_simple (gstelement_klass, "RTP SSRC Demux",
240 "Splits RTP streams based on the SSRC",
241 "Wim Taymans <wim.taymans@gmail.com>");
245 gst_rtp_ssrc_demux_class_init (GstRtpSsrcDemuxClass * klass)
247 GObjectClass *gobject_klass;
248 GstElementClass *gstelement_klass;
249 GstRtpSsrcDemuxClass *gstrtpssrcdemux_klass;
251 gobject_klass = (GObjectClass *) klass;
252 gstelement_klass = (GstElementClass *) klass;
253 gstrtpssrcdemux_klass = (GstRtpSsrcDemuxClass *) klass;
255 gobject_klass->dispose = gst_rtp_ssrc_demux_dispose;
256 gobject_klass->finalize = gst_rtp_ssrc_demux_finalize;
259 * GstRtpSsrcDemux::new-ssrc-pad:
260 * @demux: the object which received the signal
261 * @ssrc: the SSRC of the pad
264 * Emited when a new SSRC pad has been created.
266 gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD] =
267 g_signal_new ("new-ssrc-pad",
268 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
269 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, new_ssrc_pad),
270 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_OBJECT,
271 G_TYPE_NONE, 2, G_TYPE_UINT, GST_TYPE_PAD);
274 * GstRtpSsrcDemux::removed-ssrc-pad:
275 * @demux: the object which received the signal
276 * @ssrc: the SSRC of the pad
277 * @pad: the removed pad.
279 * Emited when a SSRC pad has been removed.
281 gst_rtp_ssrc_demux_signals[SIGNAL_REMOVED_SSRC_PAD] =
282 g_signal_new ("removed-ssrc-pad",
283 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
284 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, removed_ssrc_pad),
285 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_OBJECT,
286 G_TYPE_NONE, 2, G_TYPE_UINT, GST_TYPE_PAD);
289 * GstRtpSsrcDemux::clear-ssrc:
290 * @demux: the object which received the signal
291 * @ssrc: the SSRC of the pad
293 * Action signal to remove the pad for SSRC.
295 gst_rtp_ssrc_demux_signals[SIGNAL_CLEAR_SSRC] =
296 g_signal_new ("clear-ssrc",
297 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
298 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, clear_ssrc),
299 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT, G_TYPE_NONE, 1, G_TYPE_UINT);
301 gstelement_klass->change_state =
302 GST_DEBUG_FUNCPTR (gst_rtp_ssrc_demux_change_state);
303 gstrtpssrcdemux_klass->clear_ssrc =
304 GST_DEBUG_FUNCPTR (gst_rtp_ssrc_demux_clear_ssrc);
306 GST_DEBUG_CATEGORY_INIT (gst_rtp_ssrc_demux_debug,
307 "rtpssrcdemux", 0, "RTP SSRC demuxer");
311 gst_rtp_ssrc_demux_init (GstRtpSsrcDemux * demux,
312 GstRtpSsrcDemuxClass * g_class)
314 GstElementClass *klass = GST_ELEMENT_GET_CLASS (demux);
317 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
319 gst_pad_set_chain_function (demux->rtp_sink, gst_rtp_ssrc_demux_chain);
320 gst_pad_set_event_function (demux->rtp_sink, gst_rtp_ssrc_demux_sink_event);
321 gst_pad_set_iterate_internal_links_function (demux->rtp_sink,
322 gst_rtp_ssrc_demux_iterate_internal_links_sink);
323 gst_element_add_pad (GST_ELEMENT_CAST (demux), demux->rtp_sink);
326 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
327 "rtcp_sink"), "rtcp_sink");
328 gst_pad_set_chain_function (demux->rtcp_sink, gst_rtp_ssrc_demux_rtcp_chain);
329 gst_pad_set_event_function (demux->rtcp_sink,
330 gst_rtp_ssrc_demux_rtcp_sink_event);
331 gst_pad_set_iterate_internal_links_function (demux->rtcp_sink,
332 gst_rtp_ssrc_demux_iterate_internal_links_sink);
333 gst_element_add_pad (GST_ELEMENT_CAST (demux), demux->rtcp_sink);
335 g_static_rec_mutex_init (&demux->padlock);
337 gst_segment_init (&demux->segment, GST_FORMAT_UNDEFINED);
341 gst_rtp_ssrc_demux_reset (GstRtpSsrcDemux * demux)
345 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
346 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
348 gst_pad_set_active (dpad->rtp_pad, FALSE);
349 gst_pad_set_active (dpad->rtcp_pad, FALSE);
351 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtp_pad);
352 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtcp_pad);
355 g_slist_free (demux->srcpads);
356 demux->srcpads = NULL;
360 gst_rtp_ssrc_demux_dispose (GObject * object)
362 GstRtpSsrcDemux *demux;
364 demux = GST_RTP_SSRC_DEMUX (object);
366 gst_rtp_ssrc_demux_reset (demux);
368 G_OBJECT_CLASS (parent_class)->dispose (object);
372 gst_rtp_ssrc_demux_finalize (GObject * object)
374 GstRtpSsrcDemux *demux;
376 demux = GST_RTP_SSRC_DEMUX (object);
377 g_static_rec_mutex_free (&demux->padlock);
379 G_OBJECT_CLASS (parent_class)->finalize (object);
383 gst_rtp_ssrc_demux_clear_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
385 GstRtpSsrcDemuxPad *dpad;
387 GST_PAD_LOCK (demux);
388 dpad = find_demux_pad_for_ssrc (demux, ssrc);
390 GST_PAD_UNLOCK (demux);
394 GST_DEBUG_OBJECT (demux, "clearing pad for SSRC %08x", ssrc);
396 demux->srcpads = g_slist_remove (demux->srcpads, dpad);
397 GST_PAD_UNLOCK (demux);
399 gst_pad_set_active (dpad->rtp_pad, FALSE);
400 gst_pad_set_active (dpad->rtcp_pad, FALSE);
402 g_signal_emit (G_OBJECT (demux),
403 gst_rtp_ssrc_demux_signals[SIGNAL_REMOVED_SSRC_PAD], 0, ssrc,
406 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtp_pad);
407 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtcp_pad);
416 GST_WARNING_OBJECT (demux, "unknown SSRC %08x", ssrc);
422 gst_rtp_ssrc_demux_sink_event (GstPad * pad, GstEvent * event)
424 GstRtpSsrcDemux *demux;
425 gboolean res = FALSE;
427 demux = GST_RTP_SSRC_DEMUX (gst_pad_get_parent (pad));
428 if (G_UNLIKELY (demux == NULL)) {
429 gst_event_unref (event);
433 switch (GST_EVENT_TYPE (event)) {
434 case GST_EVENT_FLUSH_STOP:
435 gst_segment_init (&demux->segment, GST_FORMAT_UNDEFINED);
436 case GST_EVENT_NEWSEGMENT:
443 /* need local snapshot of pads;
444 * should not push downstream while holding lock as that might deadlock
445 * with stuff traveling upstream tyring to get this lock while holding
446 * other (stream)lock */
447 GST_PAD_LOCK (demux);
448 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
449 GstRtpSsrcDemuxPad *pad = (GstRtpSsrcDemuxPad *) walk->data;
451 pads = g_slist_prepend (pads, gst_object_ref (pad->rtp_pad));
453 GST_PAD_UNLOCK (demux);
454 for (walk = pads; walk; walk = g_slist_next (walk)) {
455 GstPad *pad = (GstPad *) walk->data;
457 gst_event_ref (event);
458 res &= gst_pad_push_event (pad, event);
459 gst_object_unref (pad);
462 gst_event_unref (event);
467 gst_object_unref (demux);
472 gst_rtp_ssrc_demux_rtcp_sink_event (GstPad * pad, GstEvent * event)
474 GstRtpSsrcDemux *demux;
475 gboolean res = FALSE;
477 demux = GST_RTP_SSRC_DEMUX (gst_pad_get_parent (pad));
479 switch (GST_EVENT_TYPE (event)) {
480 case GST_EVENT_NEWSEGMENT:
487 GST_PAD_LOCK (demux);
488 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
489 GstRtpSsrcDemuxPad *pad = (GstRtpSsrcDemuxPad *) walk->data;
491 pads = g_slist_prepend (pads, gst_object_ref (pad->rtcp_pad));
493 GST_PAD_UNLOCK (demux);
494 for (walk = pads; walk; walk = g_slist_next (walk)) {
495 GstPad *pad = (GstPad *) walk->data;
497 gst_event_ref (event);
498 res &= gst_pad_push_event (pad, event);
499 gst_object_unref (pad);
502 gst_event_unref (event);
506 gst_object_unref (demux);
511 gst_rtp_ssrc_demux_chain (GstPad * pad, GstBuffer * buf)
514 GstRtpSsrcDemux *demux;
516 GstRtpSsrcDemuxPad *dpad;
519 demux = GST_RTP_SSRC_DEMUX (GST_OBJECT_PARENT (pad));
521 if (!gst_rtp_buffer_validate (buf))
522 goto invalid_payload;
524 ssrc = gst_rtp_buffer_get_ssrc (buf);
526 GST_DEBUG_OBJECT (demux, "received buffer of SSRC %08x", ssrc);
528 GST_PAD_LOCK (demux);
529 dpad = find_or_create_demux_pad_for_ssrc (demux, ssrc);
531 GST_PAD_UNLOCK (demux);
534 srcpad = gst_object_ref (dpad->rtp_pad);
535 GST_PAD_UNLOCK (demux);
538 ret = gst_pad_push (srcpad, buf);
540 gst_object_unref (srcpad);
547 /* this is fatal and should be filtered earlier */
548 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
549 ("Dropping invalid RTP payload"));
550 gst_buffer_unref (buf);
551 return GST_FLOW_ERROR;
555 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
556 ("Could not create new pad"));
557 gst_buffer_unref (buf);
558 return GST_FLOW_ERROR;
563 gst_rtp_ssrc_demux_rtcp_chain (GstPad * pad, GstBuffer * buf)
566 GstRtpSsrcDemux *demux;
568 GstRtpSsrcDemuxPad *dpad;
569 GstRTCPPacket packet;
572 demux = GST_RTP_SSRC_DEMUX (GST_OBJECT_PARENT (pad));
574 if (!gst_rtcp_buffer_validate (buf))
577 if (!gst_rtcp_buffer_get_first_packet (buf, &packet))
580 /* first packet must be SR or RR or else the validate would have failed */
581 switch (gst_rtcp_packet_get_type (&packet)) {
582 case GST_RTCP_TYPE_SR:
583 /* get the ssrc so that we can route it to the right source pad */
584 gst_rtcp_packet_sr_get_sender_info (&packet, &ssrc, NULL, NULL, NULL,
588 goto unexpected_rtcp;
591 GST_DEBUG_OBJECT (demux, "received RTCP of SSRC %08x", ssrc);
593 GST_PAD_LOCK (demux);
594 dpad = find_or_create_demux_pad_for_ssrc (demux, ssrc);
596 GST_PAD_UNLOCK (demux);
599 srcpad = gst_object_ref (dpad->rtcp_pad);
600 GST_PAD_UNLOCK (demux);
603 ret = gst_pad_push (srcpad, buf);
605 gst_object_unref (srcpad);
612 /* this is fatal and should be filtered earlier */
613 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
614 ("Dropping invalid RTCP packet"));
615 gst_buffer_unref (buf);
616 return GST_FLOW_ERROR;
620 GST_DEBUG_OBJECT (demux, "dropping unexpected RTCP packet");
621 gst_buffer_unref (buf);
626 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
627 ("Could not create new pad"));
628 gst_buffer_unref (buf);
629 return GST_FLOW_ERROR;
634 gst_rtp_ssrc_demux_src_event (GstPad * pad, GstEvent * event)
636 GstRtpSsrcDemux *demux;
637 const GstStructure *s;
639 demux = GST_RTP_SSRC_DEMUX (gst_pad_get_parent (pad));
641 switch (GST_EVENT_TYPE (event)) {
642 case GST_EVENT_CUSTOM_UPSTREAM:
643 case GST_EVENT_CUSTOM_BOTH:
644 case GST_EVENT_CUSTOM_BOTH_OOB:
645 s = gst_event_get_structure (event);
646 if (s && !gst_structure_has_field (s, "ssrc")) {
649 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
650 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
652 if (dpad->rtp_pad == pad || dpad->rtcp_pad == pad) {
654 GST_EVENT_CAST (gst_mini_object_make_writable
655 (GST_MINI_OBJECT_CAST (event)));
656 gst_structure_set (event->structure, "ssrc", G_TYPE_UINT,
667 gst_object_unref (demux);
669 return gst_pad_event_default (pad, event);
673 gst_rtp_ssrc_demux_iterate_internal_links_src (GstPad * pad)
675 GstRtpSsrcDemux *demux;
676 GstPad *otherpad = NULL;
677 GstIterator *it = NULL;
680 demux = GST_RTP_SSRC_DEMUX (gst_pad_get_parent (pad));
685 GST_PAD_LOCK (demux);
686 for (current = demux->srcpads; current; current = g_slist_next (current)) {
687 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) current->data;
689 if (pad == dpad->rtp_pad) {
690 otherpad = demux->rtp_sink;
692 } else if (pad == dpad->rtcp_pad) {
693 otherpad = demux->rtcp_sink;
697 it = gst_iterator_new_single (GST_TYPE_PAD, otherpad,
698 (GstCopyFunction) gst_object_ref, (GFreeFunc) gst_object_unref);
699 GST_PAD_UNLOCK (demux);
701 gst_object_unref (demux);
705 /* Should return 0 for elements to be included */
707 src_pad_compare_func (gconstpointer a, gconstpointer b)
709 GstPad *pad = GST_PAD (a);
710 const gchar *prefix = b;
713 GST_OBJECT_LOCK (pad);
714 res = !GST_PAD_NAME (pad) || g_str_has_prefix (GST_PAD_NAME (pad), prefix);
715 GST_OBJECT_UNLOCK (pad);
721 gst_rtp_ssrc_demux_iterate_internal_links_sink (GstPad * pad)
723 GstRtpSsrcDemux *demux;
724 GstIterator *it = NULL;
725 const gchar *prefix = NULL;
727 demux = GST_RTP_SSRC_DEMUX (gst_pad_get_parent (pad));
732 if (pad == demux->rtp_sink)
734 else if (pad == demux->rtcp_sink)
735 prefix = "rtcp_src_";
737 g_assert_not_reached ();
739 it = gst_element_iterate_src_pads (GST_ELEMENT (demux));
741 return gst_iterator_filter (it, src_pad_compare_func, (gpointer) prefix);
746 gst_rtp_ssrc_demux_src_query (GstPad * pad, GstQuery * query)
748 GstRtpSsrcDemux *demux;
749 gboolean res = FALSE;
751 demux = GST_RTP_SSRC_DEMUX (gst_pad_get_parent (pad));
752 if (G_UNLIKELY (demux == NULL))
755 switch (GST_QUERY_TYPE (query)) {
756 case GST_QUERY_LATENCY:
759 if ((res = gst_pad_peer_query (demux->rtp_sink, query))) {
761 GstClockTime min_latency, max_latency;
762 GstRtpSsrcDemuxPad *demuxpad;
764 demuxpad = gst_pad_get_element_private (pad);
766 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
768 GST_DEBUG_OBJECT (demux, "peer min latency %" GST_TIME_FORMAT,
769 GST_TIME_ARGS (min_latency));
771 GST_DEBUG_OBJECT (demux, "latency for SSRC %08x", demuxpad->ssrc);
773 gst_query_set_latency (query, live, min_latency, max_latency);
778 res = gst_pad_query_default (pad, query);
781 gst_object_unref (demux);
786 static GstStateChangeReturn
787 gst_rtp_ssrc_demux_change_state (GstElement * element,
788 GstStateChange transition)
790 GstStateChangeReturn ret;
791 GstRtpSsrcDemux *demux;
793 demux = GST_RTP_SSRC_DEMUX (element);
795 switch (transition) {
796 case GST_STATE_CHANGE_NULL_TO_READY:
797 case GST_STATE_CHANGE_READY_TO_PAUSED:
798 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
803 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
805 switch (transition) {
806 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
808 case GST_STATE_CHANGE_PAUSED_TO_READY:
809 gst_rtp_ssrc_demux_reset (demux);
811 case GST_STATE_CHANGE_READY_TO_NULL: