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_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 #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, GstBuffer * buf);
114 static gboolean gst_rtp_ssrc_demux_sink_event (GstPad * pad, GstEvent * event);
116 static GstFlowReturn gst_rtp_ssrc_demux_rtcp_chain (GstPad * pad,
118 static gboolean gst_rtp_ssrc_demux_rtcp_sink_event (GstPad * pad,
120 static GstIterator *gst_rtp_ssrc_demux_iterate_internal_links_sink (GstPad *
121 pad, GstObject * parent);
124 static gboolean gst_rtp_ssrc_demux_src_event (GstPad * pad, GstEvent * event);
125 static GstIterator *gst_rtp_ssrc_demux_iterate_internal_links_src (GstPad *
126 pad, GstObject * parent);
127 static gboolean gst_rtp_ssrc_demux_src_query (GstPad * pad, GstObject * parent,
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;
170 GST_DEBUG_OBJECT (demux, "creating pad for SSRC %08x", ssrc);
172 demuxpad = find_demux_pad_for_ssrc (demux, ssrc);
173 if (demuxpad != NULL) {
177 klass = GST_ELEMENT_GET_CLASS (demux);
178 templ = gst_element_class_get_pad_template (klass, "src_%u");
179 padname = g_strdup_printf ("src_%u", ssrc);
180 rtp_pad = gst_pad_new_from_template (templ, padname);
183 templ = gst_element_class_get_pad_template (klass, "rtcp_src_%u");
184 padname = g_strdup_printf ("rtcp_src_%u", ssrc);
185 rtcp_pad = gst_pad_new_from_template (templ, padname);
188 /* wrap in structure and add to list */
189 demuxpad = g_new0 (GstRtpSsrcDemuxPad, 1);
190 demuxpad->ssrc = ssrc;
191 demuxpad->rtp_pad = rtp_pad;
192 demuxpad->rtcp_pad = rtcp_pad;
194 gst_pad_set_element_private (rtp_pad, demuxpad);
195 gst_pad_set_element_private (rtcp_pad, demuxpad);
197 demux->srcpads = g_slist_prepend (demux->srcpads, demuxpad);
199 /* copy caps from input */
200 caps = gst_pad_get_current_caps (demux->rtp_sink);
201 gst_pad_set_caps (rtp_pad, caps);
202 gst_caps_unref (caps);
203 gst_pad_use_fixed_caps (rtp_pad);
204 caps = gst_pad_get_current_caps (demux->rtcp_sink);
205 gst_pad_set_caps (rtcp_pad, caps);
206 gst_caps_unref (caps);
207 gst_pad_use_fixed_caps (rtcp_pad);
209 gst_pad_set_event_function (rtp_pad, gst_rtp_ssrc_demux_src_event);
210 gst_pad_set_query_function (rtp_pad, gst_rtp_ssrc_demux_src_query);
211 gst_pad_set_iterate_internal_links_function (rtp_pad,
212 gst_rtp_ssrc_demux_iterate_internal_links_src);
213 gst_pad_set_active (rtp_pad, TRUE);
215 gst_pad_set_event_function (rtcp_pad, gst_rtp_ssrc_demux_src_event);
216 gst_pad_set_iterate_internal_links_function (rtcp_pad,
217 gst_rtp_ssrc_demux_iterate_internal_links_src);
218 gst_pad_set_active (rtcp_pad, TRUE);
220 gst_element_add_pad (GST_ELEMENT_CAST (demux), rtp_pad);
221 gst_element_add_pad (GST_ELEMENT_CAST (demux), rtcp_pad);
223 g_signal_emit (G_OBJECT (demux),
224 gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD], 0, ssrc, rtp_pad);
230 gst_rtp_ssrc_demux_class_init (GstRtpSsrcDemuxClass * klass)
232 GObjectClass *gobject_klass;
233 GstElementClass *gstelement_klass;
234 GstRtpSsrcDemuxClass *gstrtpssrcdemux_klass;
236 gobject_klass = (GObjectClass *) klass;
237 gstelement_klass = (GstElementClass *) klass;
238 gstrtpssrcdemux_klass = (GstRtpSsrcDemuxClass *) klass;
240 gobject_klass->dispose = gst_rtp_ssrc_demux_dispose;
241 gobject_klass->finalize = gst_rtp_ssrc_demux_finalize;
244 * GstRtpSsrcDemux::new-ssrc-pad:
245 * @demux: the object which received the signal
246 * @ssrc: the SSRC of the pad
249 * Emited when a new SSRC pad has been created.
251 gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD] =
252 g_signal_new ("new-ssrc-pad",
253 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
254 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, new_ssrc_pad),
255 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_OBJECT,
256 G_TYPE_NONE, 2, G_TYPE_UINT, GST_TYPE_PAD);
259 * GstRtpSsrcDemux::removed-ssrc-pad:
260 * @demux: the object which received the signal
261 * @ssrc: the SSRC of the pad
262 * @pad: the removed pad.
264 * Emited when a SSRC pad has been removed.
266 gst_rtp_ssrc_demux_signals[SIGNAL_REMOVED_SSRC_PAD] =
267 g_signal_new ("removed-ssrc-pad",
268 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
269 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, removed_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::clear-ssrc:
275 * @demux: the object which received the signal
276 * @ssrc: the SSRC of the pad
278 * Action signal to remove the pad for SSRC.
280 gst_rtp_ssrc_demux_signals[SIGNAL_CLEAR_SSRC] =
281 g_signal_new ("clear-ssrc",
282 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
283 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, clear_ssrc),
284 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT, G_TYPE_NONE, 1, G_TYPE_UINT);
286 gstelement_klass->change_state =
287 GST_DEBUG_FUNCPTR (gst_rtp_ssrc_demux_change_state);
288 gstrtpssrcdemux_klass->clear_ssrc =
289 GST_DEBUG_FUNCPTR (gst_rtp_ssrc_demux_clear_ssrc);
291 gst_element_class_add_pad_template (gstelement_klass,
292 gst_static_pad_template_get (&rtp_ssrc_demux_sink_template));
293 gst_element_class_add_pad_template (gstelement_klass,
294 gst_static_pad_template_get (&rtp_ssrc_demux_rtcp_sink_template));
295 gst_element_class_add_pad_template (gstelement_klass,
296 gst_static_pad_template_get (&rtp_ssrc_demux_src_template));
297 gst_element_class_add_pad_template (gstelement_klass,
298 gst_static_pad_template_get (&rtp_ssrc_demux_rtcp_src_template));
300 gst_element_class_set_details_simple (gstelement_klass, "RTP SSRC Demux",
302 "Splits RTP streams based on the SSRC",
303 "Wim Taymans <wim.taymans@gmail.com>");
305 GST_DEBUG_CATEGORY_INIT (gst_rtp_ssrc_demux_debug,
306 "rtpssrcdemux", 0, "RTP SSRC demuxer");
310 gst_rtp_ssrc_demux_init (GstRtpSsrcDemux * demux)
312 GstElementClass *klass = GST_ELEMENT_GET_CLASS (demux);
315 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
317 gst_pad_set_chain_function (demux->rtp_sink, gst_rtp_ssrc_demux_chain);
318 gst_pad_set_event_function (demux->rtp_sink, gst_rtp_ssrc_demux_sink_event);
319 gst_pad_set_iterate_internal_links_function (demux->rtp_sink,
320 gst_rtp_ssrc_demux_iterate_internal_links_sink);
321 gst_element_add_pad (GST_ELEMENT_CAST (demux), demux->rtp_sink);
324 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
325 "rtcp_sink"), "rtcp_sink");
326 gst_pad_set_chain_function (demux->rtcp_sink, gst_rtp_ssrc_demux_rtcp_chain);
327 gst_pad_set_event_function (demux->rtcp_sink,
328 gst_rtp_ssrc_demux_rtcp_sink_event);
329 gst_pad_set_iterate_internal_links_function (demux->rtcp_sink,
330 gst_rtp_ssrc_demux_iterate_internal_links_sink);
331 gst_element_add_pad (GST_ELEMENT_CAST (demux), demux->rtcp_sink);
333 g_static_rec_mutex_init (&demux->padlock);
335 gst_segment_init (&demux->segment, GST_FORMAT_UNDEFINED);
339 gst_rtp_ssrc_demux_reset (GstRtpSsrcDemux * demux)
343 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
344 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
346 gst_pad_set_active (dpad->rtp_pad, FALSE);
347 gst_pad_set_active (dpad->rtcp_pad, FALSE);
349 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtp_pad);
350 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtcp_pad);
353 g_slist_free (demux->srcpads);
354 demux->srcpads = NULL;
358 gst_rtp_ssrc_demux_dispose (GObject * object)
360 GstRtpSsrcDemux *demux;
362 demux = GST_RTP_SSRC_DEMUX (object);
364 gst_rtp_ssrc_demux_reset (demux);
366 G_OBJECT_CLASS (parent_class)->dispose (object);
370 gst_rtp_ssrc_demux_finalize (GObject * object)
372 GstRtpSsrcDemux *demux;
374 demux = GST_RTP_SSRC_DEMUX (object);
375 g_static_rec_mutex_free (&demux->padlock);
377 G_OBJECT_CLASS (parent_class)->finalize (object);
381 gst_rtp_ssrc_demux_clear_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
383 GstRtpSsrcDemuxPad *dpad;
385 GST_PAD_LOCK (demux);
386 dpad = find_demux_pad_for_ssrc (demux, ssrc);
388 GST_PAD_UNLOCK (demux);
392 GST_DEBUG_OBJECT (demux, "clearing pad for SSRC %08x", ssrc);
394 demux->srcpads = g_slist_remove (demux->srcpads, dpad);
395 GST_PAD_UNLOCK (demux);
397 gst_pad_set_active (dpad->rtp_pad, FALSE);
398 gst_pad_set_active (dpad->rtcp_pad, FALSE);
400 g_signal_emit (G_OBJECT (demux),
401 gst_rtp_ssrc_demux_signals[SIGNAL_REMOVED_SSRC_PAD], 0, ssrc,
404 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtp_pad);
405 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtcp_pad);
414 GST_WARNING_OBJECT (demux, "unknown SSRC %08x", ssrc);
420 gst_rtp_ssrc_demux_sink_event (GstPad * pad, GstEvent * event)
422 GstRtpSsrcDemux *demux;
423 gboolean res = FALSE;
425 demux = GST_RTP_SSRC_DEMUX (gst_pad_get_parent (pad));
426 if (G_UNLIKELY (demux == NULL)) {
427 gst_event_unref (event);
431 switch (GST_EVENT_TYPE (event)) {
432 case GST_EVENT_FLUSH_STOP:
433 gst_segment_init (&demux->segment, GST_FORMAT_UNDEFINED);
440 /* need local snapshot of pads;
441 * should not push downstream while holding lock as that might deadlock
442 * with stuff traveling upstream tyring to get this lock while holding
443 * other (stream)lock */
444 GST_PAD_LOCK (demux);
445 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
446 GstRtpSsrcDemuxPad *pad = (GstRtpSsrcDemuxPad *) walk->data;
448 pads = g_slist_prepend (pads, gst_object_ref (pad->rtp_pad));
450 GST_PAD_UNLOCK (demux);
451 for (walk = pads; walk; walk = g_slist_next (walk)) {
452 GstPad *pad = (GstPad *) walk->data;
454 gst_event_ref (event);
455 res &= gst_pad_push_event (pad, event);
456 gst_object_unref (pad);
459 gst_event_unref (event);
464 gst_object_unref (demux);
469 gst_rtp_ssrc_demux_rtcp_sink_event (GstPad * pad, GstEvent * event)
471 GstRtpSsrcDemux *demux;
472 gboolean res = FALSE;
474 demux = GST_RTP_SSRC_DEMUX (gst_pad_get_parent (pad));
476 switch (GST_EVENT_TYPE (event)) {
483 GST_PAD_LOCK (demux);
484 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
485 GstRtpSsrcDemuxPad *pad = (GstRtpSsrcDemuxPad *) walk->data;
487 pads = g_slist_prepend (pads, gst_object_ref (pad->rtcp_pad));
489 GST_PAD_UNLOCK (demux);
490 for (walk = pads; walk; walk = g_slist_next (walk)) {
491 GstPad *pad = (GstPad *) walk->data;
493 gst_event_ref (event);
494 res &= gst_pad_push_event (pad, event);
495 gst_object_unref (pad);
498 gst_event_unref (event);
502 gst_object_unref (demux);
507 gst_rtp_ssrc_demux_chain (GstPad * pad, GstBuffer * buf)
510 GstRtpSsrcDemux *demux;
512 GstRtpSsrcDemuxPad *dpad;
516 demux = GST_RTP_SSRC_DEMUX (GST_OBJECT_PARENT (pad));
518 if (!gst_rtp_buffer_validate (buf))
519 goto invalid_payload;
521 gst_rtp_buffer_map (buf, GST_MAP_READ, &rtp);
522 ssrc = gst_rtp_buffer_get_ssrc (&rtp);
523 gst_rtp_buffer_unmap (&rtp);
525 GST_DEBUG_OBJECT (demux, "received buffer of SSRC %08x", ssrc);
527 GST_PAD_LOCK (demux);
528 dpad = find_or_create_demux_pad_for_ssrc (demux, ssrc);
530 GST_PAD_UNLOCK (demux);
533 srcpad = gst_object_ref (dpad->rtp_pad);
534 GST_PAD_UNLOCK (demux);
537 ret = gst_pad_push (srcpad, buf);
539 gst_object_unref (srcpad);
546 /* this is fatal and should be filtered earlier */
547 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
548 ("Dropping invalid RTP payload"));
549 gst_buffer_unref (buf);
550 return GST_FLOW_ERROR;
554 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
555 ("Could not create new pad"));
556 gst_buffer_unref (buf);
557 return GST_FLOW_ERROR;
562 gst_rtp_ssrc_demux_rtcp_chain (GstPad * pad, GstBuffer * buf)
565 GstRtpSsrcDemux *demux;
567 GstRtpSsrcDemuxPad *dpad;
568 GstRTCPPacket packet;
572 demux = GST_RTP_SSRC_DEMUX (GST_OBJECT_PARENT (pad));
574 if (!gst_rtcp_buffer_validate (buf))
577 gst_rtcp_buffer_map (buf, GST_MAP_READ, &rtcp);
578 if (!gst_rtcp_buffer_get_first_packet (&rtcp, &packet)) {
579 gst_rtcp_buffer_unmap (&rtcp);
583 /* first packet must be SR or RR or else the validate would have failed */
584 switch (gst_rtcp_packet_get_type (&packet)) {
585 case GST_RTCP_TYPE_SR:
586 /* get the ssrc so that we can route it to the right source pad */
587 gst_rtcp_packet_sr_get_sender_info (&packet, &ssrc, NULL, NULL, NULL,
591 goto unexpected_rtcp;
593 gst_rtcp_buffer_unmap (&rtcp);
595 GST_DEBUG_OBJECT (demux, "received RTCP of SSRC %08x", ssrc);
597 GST_PAD_LOCK (demux);
598 dpad = find_or_create_demux_pad_for_ssrc (demux, ssrc);
600 GST_PAD_UNLOCK (demux);
603 srcpad = gst_object_ref (dpad->rtcp_pad);
604 GST_PAD_UNLOCK (demux);
607 ret = gst_pad_push (srcpad, buf);
609 gst_object_unref (srcpad);
616 /* this is fatal and should be filtered earlier */
617 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
618 ("Dropping invalid RTCP packet"));
619 gst_buffer_unref (buf);
620 return GST_FLOW_ERROR;
624 GST_DEBUG_OBJECT (demux, "dropping unexpected RTCP packet");
625 gst_buffer_unref (buf);
630 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
631 ("Could not create new pad"));
632 gst_buffer_unref (buf);
633 return GST_FLOW_ERROR;
638 gst_rtp_ssrc_demux_src_event (GstPad * pad, GstEvent * event)
640 GstRtpSsrcDemux *demux;
641 const GstStructure *s;
643 demux = GST_RTP_SSRC_DEMUX (gst_pad_get_parent (pad));
645 switch (GST_EVENT_TYPE (event)) {
646 case GST_EVENT_CUSTOM_UPSTREAM:
647 case GST_EVENT_CUSTOM_BOTH:
648 case GST_EVENT_CUSTOM_BOTH_OOB:
649 s = gst_event_get_structure (event);
650 if (s && !gst_structure_has_field (s, "ssrc")) {
653 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
654 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
656 if (dpad->rtp_pad == pad || dpad->rtcp_pad == pad) {
660 GST_EVENT_CAST (gst_mini_object_make_writable
661 (GST_MINI_OBJECT_CAST (event)));
662 ws = gst_event_writable_structure (event);
663 gst_structure_set (ws, "ssrc", G_TYPE_UINT, dpad->ssrc, NULL);
673 gst_object_unref (demux);
675 return gst_pad_event_default (pad, event);
679 gst_rtp_ssrc_demux_iterate_internal_links_src (GstPad * pad, GstObject * parent)
681 GstRtpSsrcDemux *demux;
682 GstPad *otherpad = NULL;
683 GstIterator *it = NULL;
686 demux = GST_RTP_SSRC_DEMUX (parent);
688 GST_PAD_LOCK (demux);
689 for (current = demux->srcpads; current; current = g_slist_next (current)) {
690 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) current->data;
692 if (pad == dpad->rtp_pad) {
693 otherpad = demux->rtp_sink;
695 } else if (pad == dpad->rtcp_pad) {
696 otherpad = demux->rtcp_sink;
703 g_value_init (&val, GST_TYPE_PAD);
704 g_value_set_object (&val, otherpad);
705 it = gst_iterator_new_single (GST_TYPE_PAD, &val);
706 g_value_unset (&val);
707 gst_object_unref (otherpad);
709 GST_PAD_UNLOCK (demux);
714 /* Should return 0 for elements to be included */
716 src_pad_compare_func (gconstpointer a, gconstpointer b)
718 GstPad *pad = GST_PAD (a);
719 const gchar *prefix = b;
722 GST_OBJECT_LOCK (pad);
723 res = !GST_PAD_NAME (pad) || g_str_has_prefix (GST_PAD_NAME (pad), prefix);
724 GST_OBJECT_UNLOCK (pad);
730 gst_rtp_ssrc_demux_iterate_internal_links_sink (GstPad * pad,
733 GstRtpSsrcDemux *demux;
734 GstIterator *it = NULL;
735 GValue gval = { 0, };
737 demux = GST_RTP_SSRC_DEMUX (parent);
739 g_value_init (&gval, G_TYPE_STRING);
740 if (pad == demux->rtp_sink)
741 g_value_set_static_string (&gval, "src_");
742 else if (pad == demux->rtcp_sink)
743 g_value_set_static_string (&gval, "rtcp_src_");
745 g_assert_not_reached ();
747 it = gst_element_iterate_src_pads (GST_ELEMENT_CAST (demux));
749 it = gst_iterator_filter (it, src_pad_compare_func, &gval);
756 gst_rtp_ssrc_demux_src_query (GstPad * pad, GstObject * parent,
759 GstRtpSsrcDemux *demux;
760 gboolean res = FALSE;
762 demux = GST_RTP_SSRC_DEMUX (parent);
764 switch (GST_QUERY_TYPE (query)) {
765 case GST_QUERY_LATENCY:
768 if ((res = gst_pad_peer_query (demux->rtp_sink, query))) {
770 GstClockTime min_latency, max_latency;
771 GstRtpSsrcDemuxPad *demuxpad;
773 demuxpad = gst_pad_get_element_private (pad);
775 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
777 GST_DEBUG_OBJECT (demux, "peer min latency %" GST_TIME_FORMAT,
778 GST_TIME_ARGS (min_latency));
780 GST_DEBUG_OBJECT (demux, "latency for SSRC %08x", demuxpad->ssrc);
782 gst_query_set_latency (query, live, min_latency, max_latency);
787 res = gst_pad_query_default (pad, parent, query);
794 static GstStateChangeReturn
795 gst_rtp_ssrc_demux_change_state (GstElement * element,
796 GstStateChange transition)
798 GstStateChangeReturn ret;
799 GstRtpSsrcDemux *demux;
801 demux = GST_RTP_SSRC_DEMUX (element);
803 switch (transition) {
804 case GST_STATE_CHANGE_NULL_TO_READY:
805 case GST_STATE_CHANGE_READY_TO_PAUSED:
806 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
811 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
813 switch (transition) {
814 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
816 case GST_STATE_CHANGE_PAUSED_TO_READY:
817 gst_rtp_ssrc_demux_reset (demux);
819 case GST_STATE_CHANGE_READY_TO_NULL: