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_mutex_lock ((obj)->padlock))
87 #define GST_PAD_UNLOCK(obj) (g_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)
159 static GstRtpSsrcDemuxPad *
160 find_or_create_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
162 GstPad *rtp_pad, *rtcp_pad;
163 GstElementClass *klass;
164 GstPadTemplate *templ;
166 GstRtpSsrcDemuxPad *demuxpad;
168 GST_DEBUG_OBJECT (demux, "creating pad for SSRC %08x", ssrc);
170 GST_OBJECT_LOCK (demux);
172 demuxpad = find_demux_pad_for_ssrc (demux, ssrc);
173 if (demuxpad != NULL) {
174 GST_OBJECT_UNLOCK (demux);
178 klass = GST_ELEMENT_GET_CLASS (demux);
179 templ = gst_element_class_get_pad_template (klass, "src_%d");
180 padname = g_strdup_printf ("src_%d", ssrc);
181 rtp_pad = gst_pad_new_from_template (templ, padname);
184 templ = gst_element_class_get_pad_template (klass, "rtcp_src_%d");
185 padname = g_strdup_printf ("rtcp_src_%d", ssrc);
186 rtcp_pad = gst_pad_new_from_template (templ, padname);
189 /* wrap in structure and add to list */
190 demuxpad = g_new0 (GstRtpSsrcDemuxPad, 1);
191 demuxpad->ssrc = ssrc;
192 demuxpad->rtp_pad = rtp_pad;
193 demuxpad->rtcp_pad = rtcp_pad;
195 gst_pad_set_element_private (rtp_pad, demuxpad);
196 gst_pad_set_element_private (rtcp_pad, demuxpad);
198 demux->srcpads = g_slist_prepend (demux->srcpads, demuxpad);
200 /* copy caps from input */
201 gst_pad_set_caps (rtp_pad, GST_PAD_CAPS (demux->rtp_sink));
202 gst_pad_use_fixed_caps (rtp_pad);
203 gst_pad_set_caps (rtcp_pad, GST_PAD_CAPS (demux->rtcp_sink));
204 gst_pad_use_fixed_caps (rtcp_pad);
206 gst_pad_set_event_function (rtp_pad, gst_rtp_ssrc_demux_src_event);
207 gst_pad_set_query_function (rtp_pad, gst_rtp_ssrc_demux_src_query);
208 gst_pad_set_iterate_internal_links_function (rtp_pad,
209 gst_rtp_ssrc_demux_iterate_internal_links_src);
210 gst_pad_set_active (rtp_pad, TRUE);
212 gst_pad_set_event_function (rtcp_pad, gst_rtp_ssrc_demux_src_event);
213 gst_pad_set_iterate_internal_links_function (rtcp_pad,
214 gst_rtp_ssrc_demux_iterate_internal_links_src);
215 gst_pad_set_active (rtcp_pad, TRUE);
217 GST_OBJECT_UNLOCK (demux);
219 gst_element_add_pad (GST_ELEMENT_CAST (demux), rtp_pad);
220 gst_element_add_pad (GST_ELEMENT_CAST (demux), rtcp_pad);
222 g_signal_emit (G_OBJECT (demux),
223 gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD], 0, ssrc, rtp_pad);
229 gst_rtp_ssrc_demux_base_init (gpointer g_class)
231 GstElementClass *gstelement_klass = GST_ELEMENT_CLASS (g_class);
233 gst_element_class_add_pad_template (gstelement_klass,
234 gst_static_pad_template_get (&rtp_ssrc_demux_sink_template));
235 gst_element_class_add_pad_template (gstelement_klass,
236 gst_static_pad_template_get (&rtp_ssrc_demux_rtcp_sink_template));
237 gst_element_class_add_pad_template (gstelement_klass,
238 gst_static_pad_template_get (&rtp_ssrc_demux_src_template));
239 gst_element_class_add_pad_template (gstelement_klass,
240 gst_static_pad_template_get (&rtp_ssrc_demux_rtcp_src_template));
242 gst_element_class_set_details_simple (gstelement_klass, "RTP SSRC Demux",
244 "Splits RTP streams based on the SSRC",
245 "Wim Taymans <wim.taymans@gmail.com>");
249 gst_rtp_ssrc_demux_class_init (GstRtpSsrcDemuxClass * klass)
251 GObjectClass *gobject_klass;
252 GstElementClass *gstelement_klass;
253 GstRtpSsrcDemuxClass *gstrtpssrcdemux_klass;
255 gobject_klass = (GObjectClass *) klass;
256 gstelement_klass = (GstElementClass *) klass;
257 gstrtpssrcdemux_klass = (GstRtpSsrcDemuxClass *) klass;
259 gobject_klass->dispose = gst_rtp_ssrc_demux_dispose;
260 gobject_klass->finalize = gst_rtp_ssrc_demux_finalize;
263 * GstRtpSsrcDemux::new-ssrc-pad:
264 * @demux: the object which received the signal
265 * @ssrc: the SSRC of the pad
268 * Emited when a new SSRC pad has been created.
270 gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD] =
271 g_signal_new ("new-ssrc-pad",
272 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
273 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, new_ssrc_pad),
274 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_OBJECT,
275 G_TYPE_NONE, 2, G_TYPE_UINT, GST_TYPE_PAD);
278 * GstRtpSsrcDemux::removed-ssrc-pad:
279 * @demux: the object which received the signal
280 * @ssrc: the SSRC of the pad
281 * @pad: the removed pad.
283 * Emited when a SSRC pad has been removed.
285 gst_rtp_ssrc_demux_signals[SIGNAL_REMOVED_SSRC_PAD] =
286 g_signal_new ("removed-ssrc-pad",
287 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
288 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, removed_ssrc_pad),
289 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_OBJECT,
290 G_TYPE_NONE, 2, G_TYPE_UINT, GST_TYPE_PAD);
293 * GstRtpSsrcDemux::clear-ssrc:
294 * @demux: the object which received the signal
295 * @ssrc: the SSRC of the pad
297 * Action signal to remove the pad for SSRC.
299 gst_rtp_ssrc_demux_signals[SIGNAL_CLEAR_SSRC] =
300 g_signal_new ("clear-ssrc",
301 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
302 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, clear_ssrc),
303 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT, G_TYPE_NONE, 1, G_TYPE_UINT);
305 gstelement_klass->change_state =
306 GST_DEBUG_FUNCPTR (gst_rtp_ssrc_demux_change_state);
307 gstrtpssrcdemux_klass->clear_ssrc =
308 GST_DEBUG_FUNCPTR (gst_rtp_ssrc_demux_clear_ssrc);
310 GST_DEBUG_CATEGORY_INIT (gst_rtp_ssrc_demux_debug,
311 "rtpssrcdemux", 0, "RTP SSRC demuxer");
315 gst_rtp_ssrc_demux_init (GstRtpSsrcDemux * demux,
316 GstRtpSsrcDemuxClass * g_class)
318 GstElementClass *klass = GST_ELEMENT_GET_CLASS (demux);
321 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
323 gst_pad_set_chain_function (demux->rtp_sink, gst_rtp_ssrc_demux_chain);
324 gst_pad_set_event_function (demux->rtp_sink, gst_rtp_ssrc_demux_sink_event);
325 gst_pad_set_iterate_internal_links_function (demux->rtp_sink,
326 gst_rtp_ssrc_demux_iterate_internal_links_sink);
327 gst_element_add_pad (GST_ELEMENT_CAST (demux), demux->rtp_sink);
330 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
331 "rtcp_sink"), "rtcp_sink");
332 gst_pad_set_chain_function (demux->rtcp_sink, gst_rtp_ssrc_demux_rtcp_chain);
333 gst_pad_set_event_function (demux->rtcp_sink,
334 gst_rtp_ssrc_demux_rtcp_sink_event);
335 gst_pad_set_iterate_internal_links_function (demux->rtcp_sink,
336 gst_rtp_ssrc_demux_iterate_internal_links_sink);
337 gst_element_add_pad (GST_ELEMENT_CAST (demux), demux->rtcp_sink);
339 demux->padlock = g_mutex_new ();
341 gst_segment_init (&demux->segment, GST_FORMAT_UNDEFINED);
345 gst_rtp_ssrc_demux_reset (GstRtpSsrcDemux * demux)
349 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
350 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
352 gst_pad_set_active (dpad->rtp_pad, FALSE);
353 gst_pad_set_active (dpad->rtcp_pad, FALSE);
355 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtp_pad);
356 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtcp_pad);
359 g_slist_free (demux->srcpads);
360 demux->srcpads = NULL;
364 gst_rtp_ssrc_demux_dispose (GObject * object)
366 GstRtpSsrcDemux *demux;
368 demux = GST_RTP_SSRC_DEMUX (object);
370 gst_rtp_ssrc_demux_reset (demux);
372 G_OBJECT_CLASS (parent_class)->dispose (object);
376 gst_rtp_ssrc_demux_finalize (GObject * object)
378 GstRtpSsrcDemux *demux;
380 demux = GST_RTP_SSRC_DEMUX (object);
381 g_mutex_free (demux->padlock);
383 G_OBJECT_CLASS (parent_class)->finalize (object);
387 gst_rtp_ssrc_demux_clear_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
389 GstRtpSsrcDemuxPad *dpad;
391 GST_PAD_LOCK (demux);
392 dpad = find_demux_pad_for_ssrc (demux, ssrc);
394 GST_PAD_UNLOCK (demux);
398 GST_DEBUG_OBJECT (demux, "clearing pad for SSRC %08x", ssrc);
400 demux->srcpads = g_slist_remove (demux->srcpads, dpad);
401 GST_PAD_UNLOCK (demux);
403 gst_pad_set_active (dpad->rtp_pad, FALSE);
404 gst_pad_set_active (dpad->rtcp_pad, FALSE);
406 g_signal_emit (G_OBJECT (demux),
407 gst_rtp_ssrc_demux_signals[SIGNAL_REMOVED_SSRC_PAD], 0, ssrc,
410 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtp_pad);
411 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtcp_pad);
420 GST_WARNING_OBJECT (demux, "unknown SSRC %08x", ssrc);
426 gst_rtp_ssrc_demux_sink_event (GstPad * pad, GstEvent * event)
428 GstRtpSsrcDemux *demux;
429 gboolean res = FALSE;
431 demux = GST_RTP_SSRC_DEMUX (gst_pad_get_parent (pad));
432 if (G_UNLIKELY (demux == NULL)) {
433 gst_event_unref (event);
437 switch (GST_EVENT_TYPE (event)) {
438 case GST_EVENT_FLUSH_STOP:
439 gst_segment_init (&demux->segment, GST_FORMAT_UNDEFINED);
440 case GST_EVENT_NEWSEGMENT:
447 /* need local snapshot of pads;
448 * should not push downstream while holding lock as that might deadlock
449 * with stuff traveling upstream tyring to get this lock while holding
450 * other (stream)lock */
451 GST_PAD_LOCK (demux);
452 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
453 GstRtpSsrcDemuxPad *pad = (GstRtpSsrcDemuxPad *) walk->data;
455 pads = g_slist_prepend (pads, gst_object_ref (pad->rtp_pad));
457 GST_PAD_UNLOCK (demux);
458 for (walk = pads; walk; walk = g_slist_next (walk)) {
459 GstPad *pad = (GstPad *) walk->data;
461 gst_event_ref (event);
462 res &= gst_pad_push_event (pad, event);
463 gst_object_unref (pad);
466 gst_event_unref (event);
471 gst_object_unref (demux);
476 gst_rtp_ssrc_demux_rtcp_sink_event (GstPad * pad, GstEvent * event)
478 GstRtpSsrcDemux *demux;
479 gboolean res = FALSE;
481 demux = GST_RTP_SSRC_DEMUX (gst_pad_get_parent (pad));
483 switch (GST_EVENT_TYPE (event)) {
484 case GST_EVENT_NEWSEGMENT:
491 GST_PAD_LOCK (demux);
492 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
493 GstRtpSsrcDemuxPad *pad = (GstRtpSsrcDemuxPad *) walk->data;
495 pads = g_slist_prepend (pads, gst_object_ref (pad->rtcp_pad));
497 GST_PAD_UNLOCK (demux);
498 for (walk = pads; walk; walk = g_slist_next (walk)) {
499 GstPad *pad = (GstPad *) walk->data;
501 gst_event_ref (event);
502 res &= gst_pad_push_event (pad, event);
503 gst_object_unref (pad);
506 gst_event_unref (event);
510 gst_object_unref (demux);
515 gst_rtp_ssrc_demux_chain (GstPad * pad, GstBuffer * buf)
518 GstRtpSsrcDemux *demux;
520 GstRtpSsrcDemuxPad *dpad;
522 demux = GST_RTP_SSRC_DEMUX (GST_OBJECT_PARENT (pad));
524 if (!gst_rtp_buffer_validate (buf))
525 goto invalid_payload;
527 ssrc = gst_rtp_buffer_get_ssrc (buf);
529 GST_DEBUG_OBJECT (demux, "received buffer of SSRC %08x", ssrc);
531 dpad = find_or_create_demux_pad_for_ssrc (demux, ssrc);
536 ret = gst_pad_push (dpad->rtp_pad, buf);
543 /* this is fatal and should be filtered earlier */
544 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
545 ("Dropping invalid RTP payload"));
546 gst_buffer_unref (buf);
547 return GST_FLOW_ERROR;
551 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
552 ("Could not create new pad"));
553 gst_buffer_unref (buf);
554 return GST_FLOW_ERROR;
559 gst_rtp_ssrc_demux_rtcp_chain (GstPad * pad, GstBuffer * buf)
562 GstRtpSsrcDemux *demux;
564 GstRtpSsrcDemuxPad *dpad;
565 GstRTCPPacket packet;
567 demux = GST_RTP_SSRC_DEMUX (GST_OBJECT_PARENT (pad));
569 if (!gst_rtcp_buffer_validate (buf))
572 if (!gst_rtcp_buffer_get_first_packet (buf, &packet))
575 /* first packet must be SR or RR or else the validate would have failed */
576 switch (gst_rtcp_packet_get_type (&packet)) {
577 case GST_RTCP_TYPE_SR:
578 /* get the ssrc so that we can route it to the right source pad */
579 gst_rtcp_packet_sr_get_sender_info (&packet, &ssrc, NULL, NULL, NULL,
583 goto unexpected_rtcp;
586 GST_DEBUG_OBJECT (demux, "received RTCP of SSRC %08x", ssrc);
588 dpad = find_or_create_demux_pad_for_ssrc (demux, ssrc);
594 ret = gst_pad_push (dpad->rtcp_pad, buf);
601 /* this is fatal and should be filtered earlier */
602 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
603 ("Dropping invalid RTCP packet"));
604 gst_buffer_unref (buf);
605 return GST_FLOW_ERROR;
609 GST_DEBUG_OBJECT (demux, "dropping unexpected RTCP packet");
610 gst_buffer_unref (buf);
615 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
616 ("Could not create new pad"));
617 gst_buffer_unref (buf);
618 return GST_FLOW_ERROR;
623 gst_rtp_ssrc_demux_src_event (GstPad * pad, GstEvent * event)
625 GstRtpSsrcDemux *demux;
626 const GstStructure *s;
628 demux = GST_RTP_SSRC_DEMUX (gst_pad_get_parent (pad));
630 switch (GST_EVENT_TYPE (event)) {
631 case GST_EVENT_CUSTOM_UPSTREAM:
632 case GST_EVENT_CUSTOM_BOTH:
633 case GST_EVENT_CUSTOM_BOTH_OOB:
634 s = gst_event_get_structure (event);
635 if (s && !gst_structure_has_field (s, "ssrc")) {
638 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
639 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
641 if (dpad->rtp_pad == pad || dpad->rtcp_pad == pad) {
643 GST_EVENT_CAST (gst_mini_object_make_writable
644 (GST_MINI_OBJECT_CAST (event)));
645 gst_structure_set (event->structure, "ssrc", G_TYPE_UINT,
656 gst_object_unref (demux);
658 return gst_pad_event_default (pad, event);
662 gst_rtp_ssrc_demux_iterate_internal_links_src (GstPad * pad)
664 GstRtpSsrcDemux *demux;
665 GstPad *otherpad = NULL;
666 GstIterator *it = NULL;
669 demux = GST_RTP_SSRC_DEMUX (gst_pad_get_parent (pad));
674 GST_PAD_LOCK (demux);
675 for (current = demux->srcpads; current; current = g_slist_next (current)) {
676 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) current->data;
678 if (pad == dpad->rtp_pad) {
679 otherpad = demux->rtp_sink;
681 } else if (pad == dpad->rtcp_pad) {
682 otherpad = demux->rtcp_sink;
686 it = gst_iterator_new_single (GST_TYPE_PAD, otherpad,
687 (GstCopyFunction) gst_object_ref, (GFreeFunc) gst_object_unref);
688 GST_PAD_UNLOCK (demux);
690 gst_object_unref (demux);
694 /* Should return 0 for elements to be included */
696 src_pad_compare_func (gconstpointer a, gconstpointer b)
698 GstPad *pad = GST_PAD (a);
699 const gchar *prefix = b;
702 GST_OBJECT_LOCK (pad);
703 res = !GST_PAD_NAME (pad) || g_str_has_prefix (GST_PAD_NAME (pad), prefix);
704 GST_OBJECT_UNLOCK (pad);
710 gst_rtp_ssrc_demux_iterate_internal_links_sink (GstPad * pad)
712 GstRtpSsrcDemux *demux;
713 GstIterator *it = NULL;
714 const gchar *prefix = NULL;
716 demux = GST_RTP_SSRC_DEMUX (gst_pad_get_parent (pad));
721 if (pad == demux->rtp_sink)
723 else if (pad == demux->rtcp_sink)
724 prefix = "rtcp_src_";
726 g_assert_not_reached ();
728 it = gst_element_iterate_src_pads (GST_ELEMENT (demux));
730 return gst_iterator_filter (it, src_pad_compare_func, (gpointer) prefix);
735 gst_rtp_ssrc_demux_src_query (GstPad * pad, GstQuery * query)
737 GstRtpSsrcDemux *demux;
738 gboolean res = FALSE;
740 demux = GST_RTP_SSRC_DEMUX (gst_pad_get_parent (pad));
741 if (G_UNLIKELY (demux == NULL))
744 switch (GST_QUERY_TYPE (query)) {
745 case GST_QUERY_LATENCY:
748 if ((res = gst_pad_peer_query (demux->rtp_sink, query))) {
750 GstClockTime min_latency, max_latency;
751 GstRtpSsrcDemuxPad *demuxpad;
753 demuxpad = gst_pad_get_element_private (pad);
755 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
757 GST_DEBUG_OBJECT (demux, "peer min latency %" GST_TIME_FORMAT,
758 GST_TIME_ARGS (min_latency));
760 GST_DEBUG_OBJECT (demux, "latency for SSRC %08x", demuxpad->ssrc);
762 gst_query_set_latency (query, live, min_latency, max_latency);
767 res = gst_pad_query_default (pad, query);
770 gst_object_unref (demux);
775 static GstStateChangeReturn
776 gst_rtp_ssrc_demux_change_state (GstElement * element,
777 GstStateChange transition)
779 GstStateChangeReturn ret;
780 GstRtpSsrcDemux *demux;
782 demux = GST_RTP_SSRC_DEMUX (element);
784 switch (transition) {
785 case GST_STATE_CHANGE_NULL_TO_READY:
786 case GST_STATE_CHANGE_READY_TO_PAUSED:
787 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
792 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
794 switch (transition) {
795 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
797 case GST_STATE_CHANGE_PAUSED_TO_READY:
798 gst_rtp_ssrc_demux_reset (demux);
800 case GST_STATE_CHANGE_READY_TO_NULL: