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 static GstRtpSsrcDemuxPad *
164 find_or_create_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
166 GstPad *rtp_pad, *rtcp_pad;
167 GstElementClass *klass;
168 GstPadTemplate *templ;
170 GstRtpSsrcDemuxPad *demuxpad;
173 GST_DEBUG_OBJECT (demux, "creating pad for SSRC %08x", ssrc);
175 demuxpad = find_demux_pad_for_ssrc (demux, ssrc);
176 if (demuxpad != NULL) {
180 klass = GST_ELEMENT_GET_CLASS (demux);
181 templ = gst_element_class_get_pad_template (klass, "src_%u");
182 padname = g_strdup_printf ("src_%u", ssrc);
183 rtp_pad = gst_pad_new_from_template (templ, padname);
186 templ = gst_element_class_get_pad_template (klass, "rtcp_src_%u");
187 padname = g_strdup_printf ("rtcp_src_%u", ssrc);
188 rtcp_pad = gst_pad_new_from_template (templ, padname);
191 /* wrap in structure and add to list */
192 demuxpad = g_new0 (GstRtpSsrcDemuxPad, 1);
193 demuxpad->ssrc = ssrc;
194 demuxpad->rtp_pad = rtp_pad;
195 demuxpad->rtcp_pad = rtcp_pad;
197 gst_pad_set_element_private (rtp_pad, demuxpad);
198 gst_pad_set_element_private (rtcp_pad, demuxpad);
200 demux->srcpads = g_slist_prepend (demux->srcpads, demuxpad);
202 gst_pad_set_query_function (rtp_pad, gst_rtp_ssrc_demux_src_query);
203 gst_pad_set_iterate_internal_links_function (rtp_pad,
204 gst_rtp_ssrc_demux_iterate_internal_links_src);
205 gst_pad_set_event_function (rtp_pad, gst_rtp_ssrc_demux_src_event);
206 gst_pad_use_fixed_caps (rtp_pad);
207 gst_pad_set_active (rtp_pad, TRUE);
209 gst_pad_set_event_function (rtcp_pad, gst_rtp_ssrc_demux_src_event);
210 gst_pad_set_iterate_internal_links_function (rtcp_pad,
211 gst_rtp_ssrc_demux_iterate_internal_links_src);
212 gst_pad_use_fixed_caps (rtcp_pad);
213 gst_pad_set_active (rtcp_pad, TRUE);
215 /* copy caps from input */
216 if ((caps = gst_pad_get_current_caps (demux->rtp_sink))) {
217 gst_pad_set_caps (rtp_pad, caps);
218 gst_caps_unref (caps);
220 if ((caps = gst_pad_get_current_caps (demux->rtcp_sink))) {
221 gst_pad_set_caps (rtcp_pad, caps);
222 gst_caps_unref (caps);
224 gst_element_add_pad (GST_ELEMENT_CAST (demux), rtp_pad);
225 gst_element_add_pad (GST_ELEMENT_CAST (demux), rtcp_pad);
227 g_signal_emit (G_OBJECT (demux),
228 gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD], 0, ssrc, rtp_pad);
234 gst_rtp_ssrc_demux_class_init (GstRtpSsrcDemuxClass * klass)
236 GObjectClass *gobject_klass;
237 GstElementClass *gstelement_klass;
238 GstRtpSsrcDemuxClass *gstrtpssrcdemux_klass;
240 gobject_klass = (GObjectClass *) klass;
241 gstelement_klass = (GstElementClass *) klass;
242 gstrtpssrcdemux_klass = (GstRtpSsrcDemuxClass *) klass;
244 gobject_klass->dispose = gst_rtp_ssrc_demux_dispose;
245 gobject_klass->finalize = gst_rtp_ssrc_demux_finalize;
248 * GstRtpSsrcDemux::new-ssrc-pad:
249 * @demux: the object which received the signal
250 * @ssrc: the SSRC of the pad
253 * Emited when a new SSRC pad has been created.
255 gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD] =
256 g_signal_new ("new-ssrc-pad",
257 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
258 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, new_ssrc_pad),
259 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT_OBJECT,
260 G_TYPE_NONE, 2, G_TYPE_UINT, GST_TYPE_PAD);
263 * GstRtpSsrcDemux::removed-ssrc-pad:
264 * @demux: the object which received the signal
265 * @ssrc: the SSRC of the pad
266 * @pad: the removed pad.
268 * Emited when a SSRC pad has been removed.
270 gst_rtp_ssrc_demux_signals[SIGNAL_REMOVED_SSRC_PAD] =
271 g_signal_new ("removed-ssrc-pad",
272 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
273 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, removed_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::clear-ssrc:
279 * @demux: the object which received the signal
280 * @ssrc: the SSRC of the pad
282 * Action signal to remove the pad for SSRC.
284 gst_rtp_ssrc_demux_signals[SIGNAL_CLEAR_SSRC] =
285 g_signal_new ("clear-ssrc",
286 G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
287 G_STRUCT_OFFSET (GstRtpSsrcDemuxClass, clear_ssrc),
288 NULL, NULL, gst_rtp_bin_marshal_VOID__UINT, G_TYPE_NONE, 1, G_TYPE_UINT);
290 gstelement_klass->change_state =
291 GST_DEBUG_FUNCPTR (gst_rtp_ssrc_demux_change_state);
292 gstrtpssrcdemux_klass->clear_ssrc =
293 GST_DEBUG_FUNCPTR (gst_rtp_ssrc_demux_clear_ssrc);
295 gst_element_class_add_pad_template (gstelement_klass,
296 gst_static_pad_template_get (&rtp_ssrc_demux_sink_template));
297 gst_element_class_add_pad_template (gstelement_klass,
298 gst_static_pad_template_get (&rtp_ssrc_demux_rtcp_sink_template));
299 gst_element_class_add_pad_template (gstelement_klass,
300 gst_static_pad_template_get (&rtp_ssrc_demux_src_template));
301 gst_element_class_add_pad_template (gstelement_klass,
302 gst_static_pad_template_get (&rtp_ssrc_demux_rtcp_src_template));
304 gst_element_class_set_details_simple (gstelement_klass, "RTP SSRC Demux",
306 "Splits RTP streams based on the SSRC",
307 "Wim Taymans <wim.taymans@gmail.com>");
309 GST_DEBUG_CATEGORY_INIT (gst_rtp_ssrc_demux_debug,
310 "rtpssrcdemux", 0, "RTP SSRC demuxer");
314 gst_rtp_ssrc_demux_init (GstRtpSsrcDemux * demux)
316 GstElementClass *klass = GST_ELEMENT_GET_CLASS (demux);
319 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
321 gst_pad_set_chain_function (demux->rtp_sink, gst_rtp_ssrc_demux_chain);
322 gst_pad_set_event_function (demux->rtp_sink, gst_rtp_ssrc_demux_sink_event);
323 gst_pad_set_iterate_internal_links_function (demux->rtp_sink,
324 gst_rtp_ssrc_demux_iterate_internal_links_sink);
325 gst_element_add_pad (GST_ELEMENT_CAST (demux), demux->rtp_sink);
328 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
329 "rtcp_sink"), "rtcp_sink");
330 gst_pad_set_chain_function (demux->rtcp_sink, gst_rtp_ssrc_demux_rtcp_chain);
331 gst_pad_set_event_function (demux->rtcp_sink,
332 gst_rtp_ssrc_demux_rtcp_sink_event);
333 gst_pad_set_iterate_internal_links_function (demux->rtcp_sink,
334 gst_rtp_ssrc_demux_iterate_internal_links_sink);
335 gst_element_add_pad (GST_ELEMENT_CAST (demux), demux->rtcp_sink);
337 g_rec_mutex_init (&demux->padlock);
339 gst_segment_init (&demux->segment, GST_FORMAT_UNDEFINED);
343 gst_rtp_ssrc_demux_reset (GstRtpSsrcDemux * demux)
347 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
348 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
350 gst_pad_set_active (dpad->rtp_pad, FALSE);
351 gst_pad_set_active (dpad->rtcp_pad, FALSE);
353 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtp_pad);
354 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtcp_pad);
357 g_slist_free (demux->srcpads);
358 demux->srcpads = NULL;
362 gst_rtp_ssrc_demux_dispose (GObject * object)
364 GstRtpSsrcDemux *demux;
366 demux = GST_RTP_SSRC_DEMUX (object);
368 gst_rtp_ssrc_demux_reset (demux);
370 G_OBJECT_CLASS (parent_class)->dispose (object);
374 gst_rtp_ssrc_demux_finalize (GObject * object)
376 GstRtpSsrcDemux *demux;
378 demux = GST_RTP_SSRC_DEMUX (object);
379 g_rec_mutex_clear (&demux->padlock);
381 G_OBJECT_CLASS (parent_class)->finalize (object);
385 gst_rtp_ssrc_demux_clear_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc)
387 GstRtpSsrcDemuxPad *dpad;
389 GST_PAD_LOCK (demux);
390 dpad = find_demux_pad_for_ssrc (demux, ssrc);
392 GST_PAD_UNLOCK (demux);
396 GST_DEBUG_OBJECT (demux, "clearing pad for SSRC %08x", ssrc);
398 demux->srcpads = g_slist_remove (demux->srcpads, dpad);
399 GST_PAD_UNLOCK (demux);
401 gst_pad_set_active (dpad->rtp_pad, FALSE);
402 gst_pad_set_active (dpad->rtcp_pad, FALSE);
404 g_signal_emit (G_OBJECT (demux),
405 gst_rtp_ssrc_demux_signals[SIGNAL_REMOVED_SSRC_PAD], 0, ssrc,
408 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtp_pad);
409 gst_element_remove_pad (GST_ELEMENT_CAST (demux), dpad->rtcp_pad);
418 GST_WARNING_OBJECT (demux, "unknown SSRC %08x", ssrc);
424 gst_rtp_ssrc_demux_sink_event (GstPad * pad, GstObject * parent,
427 GstRtpSsrcDemux *demux;
428 gboolean res = FALSE;
430 demux = GST_RTP_SSRC_DEMUX (parent);
432 switch (GST_EVENT_TYPE (event)) {
433 case GST_EVENT_FLUSH_STOP:
434 gst_segment_init (&demux->segment, GST_FORMAT_UNDEFINED);
442 /* need local snapshot of pads;
443 * should not push downstream while holding lock as that might deadlock
444 * with stuff traveling upstream tyring to get this lock while holding
445 * other (stream)lock */
446 GST_PAD_LOCK (demux);
447 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
448 GstRtpSsrcDemuxPad *pad = (GstRtpSsrcDemuxPad *) walk->data;
450 pads = g_slist_prepend (pads, gst_object_ref (pad->rtp_pad));
452 GST_PAD_UNLOCK (demux);
453 for (walk = pads; walk; walk = g_slist_next (walk)) {
454 GstPad *pad = (GstPad *) walk->data;
456 gst_event_ref (event);
457 res &= gst_pad_push_event (pad, event);
458 gst_object_unref (pad);
461 gst_event_unref (event);
470 gst_rtp_ssrc_demux_rtcp_sink_event (GstPad * pad, GstObject * parent,
473 GstRtpSsrcDemux *demux;
474 gboolean res = FALSE;
476 demux = GST_RTP_SSRC_DEMUX (parent);
478 switch (GST_EVENT_TYPE (event)) {
485 GST_PAD_LOCK (demux);
486 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
487 GstRtpSsrcDemuxPad *pad = (GstRtpSsrcDemuxPad *) walk->data;
489 pads = g_slist_prepend (pads, gst_object_ref (pad->rtcp_pad));
491 GST_PAD_UNLOCK (demux);
492 for (walk = pads; walk; walk = g_slist_next (walk)) {
493 GstPad *pad = (GstPad *) walk->data;
495 gst_event_ref (event);
496 res &= gst_pad_push_event (pad, event);
497 gst_object_unref (pad);
500 gst_event_unref (event);
508 gst_rtp_ssrc_demux_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
511 GstRtpSsrcDemux *demux;
513 GstRtpSsrcDemuxPad *dpad;
514 GstRTPBuffer rtp = { NULL };
517 demux = GST_RTP_SSRC_DEMUX (parent);
519 if (!gst_rtp_buffer_validate (buf))
520 goto invalid_payload;
522 gst_rtp_buffer_map (buf, GST_MAP_READ, &rtp);
523 ssrc = gst_rtp_buffer_get_ssrc (&rtp);
524 gst_rtp_buffer_unmap (&rtp);
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, GstObject * parent,
567 GstRtpSsrcDemux *demux;
569 GstRtpSsrcDemuxPad *dpad;
570 GstRTCPPacket packet;
571 GstRTCPBuffer rtcp = { NULL, };
574 demux = GST_RTP_SSRC_DEMUX (parent);
576 if (!gst_rtcp_buffer_validate (buf))
579 gst_rtcp_buffer_map (buf, GST_MAP_READ, &rtcp);
580 if (!gst_rtcp_buffer_get_first_packet (&rtcp, &packet)) {
581 gst_rtcp_buffer_unmap (&rtcp);
585 /* first packet must be SR or RR or else the validate would have failed */
586 switch (gst_rtcp_packet_get_type (&packet)) {
587 case GST_RTCP_TYPE_SR:
588 /* get the ssrc so that we can route it to the right source pad */
589 gst_rtcp_packet_sr_get_sender_info (&packet, &ssrc, NULL, NULL, NULL,
593 goto unexpected_rtcp;
595 gst_rtcp_buffer_unmap (&rtcp);
597 GST_DEBUG_OBJECT (demux, "received RTCP of SSRC %08x", ssrc);
599 GST_PAD_LOCK (demux);
600 dpad = find_or_create_demux_pad_for_ssrc (demux, ssrc);
602 GST_PAD_UNLOCK (demux);
605 srcpad = gst_object_ref (dpad->rtcp_pad);
606 GST_PAD_UNLOCK (demux);
609 ret = gst_pad_push (srcpad, buf);
611 gst_object_unref (srcpad);
618 /* this is fatal and should be filtered earlier */
619 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
620 ("Dropping invalid RTCP packet"));
621 gst_buffer_unref (buf);
622 return GST_FLOW_ERROR;
626 GST_DEBUG_OBJECT (demux, "dropping unexpected RTCP packet");
627 gst_buffer_unref (buf);
632 GST_ELEMENT_ERROR (demux, STREAM, DECODE, (NULL),
633 ("Could not create new pad"));
634 gst_buffer_unref (buf);
635 return GST_FLOW_ERROR;
640 gst_rtp_ssrc_demux_src_event (GstPad * pad, GstObject * parent,
643 GstRtpSsrcDemux *demux;
644 const GstStructure *s;
646 demux = GST_RTP_SSRC_DEMUX (parent);
648 switch (GST_EVENT_TYPE (event)) {
649 case GST_EVENT_CUSTOM_UPSTREAM:
650 case GST_EVENT_CUSTOM_BOTH:
651 case GST_EVENT_CUSTOM_BOTH_OOB:
652 s = gst_event_get_structure (event);
653 if (s && !gst_structure_has_field (s, "ssrc")) {
656 for (walk = demux->srcpads; walk; walk = g_slist_next (walk)) {
657 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
659 if (dpad->rtp_pad == pad || dpad->rtcp_pad == pad) {
663 GST_EVENT_CAST (gst_mini_object_make_writable
664 (GST_MINI_OBJECT_CAST (event)));
665 ws = gst_event_writable_structure (event);
666 gst_structure_set (ws, "ssrc", G_TYPE_UINT, dpad->ssrc, NULL);
676 return gst_pad_event_default (pad, parent, event);
680 gst_rtp_ssrc_demux_iterate_internal_links_src (GstPad * pad, GstObject * parent)
682 GstRtpSsrcDemux *demux;
683 GstPad *otherpad = NULL;
684 GstIterator *it = NULL;
687 demux = GST_RTP_SSRC_DEMUX (parent);
689 GST_PAD_LOCK (demux);
690 for (current = demux->srcpads; current; current = g_slist_next (current)) {
691 GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) current->data;
693 if (pad == dpad->rtp_pad) {
694 otherpad = demux->rtp_sink;
696 } else if (pad == dpad->rtcp_pad) {
697 otherpad = demux->rtcp_sink;
704 g_value_init (&val, GST_TYPE_PAD);
705 g_value_set_object (&val, otherpad);
706 it = gst_iterator_new_single (GST_TYPE_PAD, &val);
707 g_value_unset (&val);
710 GST_PAD_UNLOCK (demux);
715 /* Should return 0 for elements to be included */
717 src_pad_compare_func (gconstpointer a, gconstpointer b)
719 GstPad *pad = GST_PAD (g_value_get_object (a));
720 const gchar *prefix = g_value_get_string (b);
723 GST_OBJECT_LOCK (pad);
724 res = !GST_PAD_NAME (pad) || g_str_has_prefix (GST_PAD_NAME (pad), prefix);
725 GST_OBJECT_UNLOCK (pad);
731 gst_rtp_ssrc_demux_iterate_internal_links_sink (GstPad * pad,
734 GstRtpSsrcDemux *demux;
735 GstIterator *it = NULL;
736 GValue gval = { 0, };
738 demux = GST_RTP_SSRC_DEMUX (parent);
740 g_value_init (&gval, G_TYPE_STRING);
741 if (pad == demux->rtp_sink)
742 g_value_set_static_string (&gval, "src_");
743 else if (pad == demux->rtcp_sink)
744 g_value_set_static_string (&gval, "rtcp_src_");
746 g_assert_not_reached ();
748 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: