1 /* RTP muxer element for GStreamer
5 * Copyright (C) <2007-2010> Nokia Corporation.
6 * Contact: Zeeshan Ali <zeeshan.ali@nokia.com>
7 * Copyright (C) <2007-2010> Collabora Ltd
8 * Contact: Olivier Crete <olivier.crete@collabora.co.uk>
9 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
10 * 2000,2005 Wim Taymans <wim@fluendo.com>
12 * This library is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU Library General Public
14 * License as published by the Free Software Foundation; either
15 * version 2 of the License, or (at your option) any later version.
17 * This library is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * Library General Public License for more details.
22 * You should have received a copy of the GNU Library General Public
23 * License along with this library; if not, write to the
24 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
25 * Boston, MA 02110-1301, USA.
29 * SECTION:element-rtpmux
30 * @see_also: rtpdtmfmux
32 * The rtp muxer takes multiple RTP streams having the same clock-rate and
33 * muxes into a single stream with a single SSRC.
36 * <title>Example pipelines</title>
38 * gst-launch-1.0 rtpmux name=mux ! udpsink host=127.0.0.1 port=8888 \
39 * alsasrc ! alawenc ! rtppcmapay ! \
40 * application/x-rtp, payload=8, rate=8000 ! mux.sink_0 \
41 * audiotestsrc is-live=1 ! \
42 * mulawenc ! rtppcmupay ! \
43 * application/x-rtp, payload=0, rate=8000 ! mux.sink_1
45 * In this example, an audio stream is captured from ALSA and another is
46 * generated, both are encoded into different payload types and muxed together
47 * so they can be sent on the same port.
56 #include <gst/rtp/gstrtpbuffer.h>
59 #include "gstrtpmux.h"
61 GST_DEBUG_CATEGORY_STATIC (gst_rtp_mux_debug);
62 #define GST_CAT_DEFAULT gst_rtp_mux_debug
67 PROP_TIMESTAMP_OFFSET,
73 #define DEFAULT_TIMESTAMP_OFFSET -1
74 #define DEFAULT_SEQNUM_OFFSET -1
75 #define DEFAULT_SSRC -1
77 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
80 GST_STATIC_CAPS ("application/x-rtp")
83 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%u",
86 GST_STATIC_CAPS ("application/x-rtp")
89 static GstPad *gst_rtp_mux_request_new_pad (GstElement * element,
90 GstPadTemplate * templ, const gchar * name, const GstCaps * caps);
91 static void gst_rtp_mux_release_pad (GstElement * element, GstPad * pad);
92 static GstFlowReturn gst_rtp_mux_chain (GstPad * pad, GstObject * parent,
94 static GstFlowReturn gst_rtp_mux_chain_list (GstPad * pad, GstObject * parent,
95 GstBufferList * bufferlist);
96 static gboolean gst_rtp_mux_setcaps (GstPad * pad, GstRTPMux * rtp_mux,
98 static gboolean gst_rtp_mux_sink_event (GstPad * pad, GstObject * parent,
100 static gboolean gst_rtp_mux_sink_query (GstPad * pad, GstObject * parent,
103 static GstStateChangeReturn gst_rtp_mux_change_state (GstElement *
104 element, GstStateChange transition);
106 static void gst_rtp_mux_set_property (GObject * object, guint prop_id,
107 const GValue * value, GParamSpec * pspec);
108 static void gst_rtp_mux_get_property (GObject * object, guint prop_id,
109 GValue * value, GParamSpec * pspec);
110 static void gst_rtp_mux_dispose (GObject * object);
112 static gboolean gst_rtp_mux_src_event_real (GstRTPMux * rtp_mux,
115 G_DEFINE_TYPE (GstRTPMux, gst_rtp_mux, GST_TYPE_ELEMENT);
119 gst_rtp_mux_class_init (GstRTPMuxClass * klass)
121 GObjectClass *gobject_class;
122 GstElementClass *gstelement_class;
124 gobject_class = (GObjectClass *) klass;
125 gstelement_class = (GstElementClass *) klass;
128 gst_element_class_add_pad_template (gstelement_class,
129 gst_static_pad_template_get (&src_factory));
130 gst_element_class_add_pad_template (gstelement_class,
131 gst_static_pad_template_get (&sink_factory));
133 gst_element_class_set_static_metadata (gstelement_class, "RTP muxer",
135 "multiplex N rtp streams into one", "Zeeshan Ali <first.last@nokia.com>");
137 gobject_class->get_property = gst_rtp_mux_get_property;
138 gobject_class->set_property = gst_rtp_mux_set_property;
139 gobject_class->dispose = gst_rtp_mux_dispose;
141 klass->src_event = gst_rtp_mux_src_event_real;
143 g_object_class_install_property (G_OBJECT_CLASS (klass),
144 PROP_TIMESTAMP_OFFSET, g_param_spec_int ("timestamp-offset",
146 "Offset to add to all outgoing timestamps (-1 = random)", -1,
147 G_MAXINT, DEFAULT_TIMESTAMP_OFFSET,
148 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
149 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SEQNUM_OFFSET,
150 g_param_spec_int ("seqnum-offset", "Sequence number Offset",
151 "Offset to add to all outgoing seqnum (-1 = random)", -1, G_MAXINT,
152 DEFAULT_SEQNUM_OFFSET, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
153 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SEQNUM,
154 g_param_spec_uint ("seqnum", "Sequence number",
155 "The RTP sequence number of the last processed packet",
156 0, G_MAXUINT, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
157 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SSRC,
158 g_param_spec_uint ("ssrc", "SSRC",
159 "The SSRC of the packets (default == random)",
160 0, G_MAXUINT, DEFAULT_SSRC,
161 GST_PARAM_MUTABLE_PLAYING | G_PARAM_READWRITE |
162 G_PARAM_STATIC_STRINGS));
164 gstelement_class->request_new_pad =
165 GST_DEBUG_FUNCPTR (gst_rtp_mux_request_new_pad);
166 gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_rtp_mux_release_pad);
167 gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_rtp_mux_change_state);
171 gst_rtp_mux_dispose (GObject * object)
173 GstRTPMux *rtp_mux = GST_RTP_MUX (object);
176 g_clear_object (&rtp_mux->last_pad);
179 for (item = GST_ELEMENT_PADS (object); item; item = g_list_next (item)) {
180 GstPad *pad = GST_PAD (item->data);
181 if (GST_PAD_IS_SINK (pad)) {
182 gst_element_release_request_pad (GST_ELEMENT (object), pad);
187 G_OBJECT_CLASS (gst_rtp_mux_parent_class)->dispose (object);
191 gst_rtp_mux_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
193 GstRTPMux *rtp_mux = GST_RTP_MUX (parent);
194 GstRTPMuxClass *klass;
197 klass = GST_RTP_MUX_GET_CLASS (rtp_mux);
199 ret = klass->src_event (rtp_mux, event);
205 gst_rtp_mux_src_event_real (GstRTPMux * rtp_mux, GstEvent * event)
208 gboolean result = FALSE;
209 gboolean done = FALSE;
211 switch (GST_EVENT_TYPE (event)) {
212 case GST_EVENT_CUSTOM_UPSTREAM:
214 const GstStructure *s = gst_event_get_structure (event);
216 if (gst_structure_has_name (s, "GstRTPCollision")) {
219 if (!gst_structure_get_uint (s, "ssrc", &ssrc))
222 GST_DEBUG_OBJECT (rtp_mux, "collided ssrc: %" G_GUINT32_FORMAT, ssrc);
224 /* choose another ssrc for our stream */
225 GST_OBJECT_LOCK (rtp_mux);
226 if (ssrc == rtp_mux->current_ssrc) {
228 guint suggested_ssrc = 0;
231 if (gst_structure_get_uint (s, "suggested-ssrc", &suggested_ssrc))
232 rtp_mux->current_ssrc = suggested_ssrc;
234 while (ssrc == rtp_mux->current_ssrc)
235 rtp_mux->current_ssrc = g_random_int ();
237 new_ssrc = rtp_mux->current_ssrc;
238 GST_OBJECT_UNLOCK (rtp_mux);
240 caps = gst_pad_get_current_caps (rtp_mux->srcpad);
241 caps = gst_caps_make_writable (caps);
242 gst_caps_set_simple (caps, "ssrc", G_TYPE_UINT, new_ssrc, NULL);
243 gst_pad_set_caps (rtp_mux->srcpad, caps);
244 gst_caps_unref (caps);
246 GST_OBJECT_UNLOCK (rtp_mux);
256 iter = gst_element_iterate_sink_pads (GST_ELEMENT (rtp_mux));
259 GValue item = { 0, };
261 switch (gst_iterator_next (iter, &item)) {
262 case GST_ITERATOR_OK:
263 gst_event_ref (event);
264 result |= gst_pad_push_event (g_value_get_object (&item), event);
265 g_value_reset (&item);
267 case GST_ITERATOR_RESYNC:
268 gst_iterator_resync (iter);
271 case GST_ITERATOR_ERROR:
272 GST_WARNING_OBJECT (rtp_mux, "Error iterating sinkpads");
273 case GST_ITERATOR_DONE:
278 gst_iterator_free (iter);
279 gst_event_unref (event);
285 gst_rtp_mux_init (GstRTPMux * rtp_mux)
287 GstElementClass *klass = GST_ELEMENT_GET_CLASS (rtp_mux);
290 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
292 gst_pad_set_event_function (rtp_mux->srcpad,
293 GST_DEBUG_FUNCPTR (gst_rtp_mux_src_event));
294 gst_pad_use_fixed_caps (rtp_mux->srcpad);
295 gst_element_add_pad (GST_ELEMENT (rtp_mux), rtp_mux->srcpad);
297 rtp_mux->ssrc = DEFAULT_SSRC;
298 rtp_mux->current_ssrc = DEFAULT_SSRC;
299 rtp_mux->ssrc_random = TRUE;
300 rtp_mux->ts_offset = DEFAULT_TIMESTAMP_OFFSET;
301 rtp_mux->seqnum_offset = DEFAULT_SEQNUM_OFFSET;
303 rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
307 gst_rtp_mux_setup_sinkpad (GstRTPMux * rtp_mux, GstPad * sinkpad)
309 GstRTPMuxPadPrivate *padpriv = g_slice_new0 (GstRTPMuxPadPrivate);
311 /* setup some pad functions */
312 gst_pad_set_chain_function (sinkpad, GST_DEBUG_FUNCPTR (gst_rtp_mux_chain));
313 gst_pad_set_chain_list_function (sinkpad,
314 GST_DEBUG_FUNCPTR (gst_rtp_mux_chain_list));
315 gst_pad_set_event_function (sinkpad,
316 GST_DEBUG_FUNCPTR (gst_rtp_mux_sink_event));
317 gst_pad_set_query_function (sinkpad,
318 GST_DEBUG_FUNCPTR (gst_rtp_mux_sink_query));
321 gst_segment_init (&padpriv->segment, GST_FORMAT_UNDEFINED);
323 gst_pad_set_element_private (sinkpad, padpriv);
325 gst_pad_set_active (sinkpad, TRUE);
326 gst_element_add_pad (GST_ELEMENT (rtp_mux), sinkpad);
330 gst_rtp_mux_request_new_pad (GstElement * element,
331 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
336 g_return_val_if_fail (templ != NULL, NULL);
337 g_return_val_if_fail (GST_IS_RTP_MUX (element), NULL);
339 rtp_mux = GST_RTP_MUX (element);
341 if (templ->direction != GST_PAD_SINK) {
342 GST_WARNING_OBJECT (rtp_mux, "request pad that is not a SINK pad");
346 newpad = gst_pad_new_from_template (templ, req_name);
348 gst_rtp_mux_setup_sinkpad (rtp_mux, newpad);
350 GST_WARNING_OBJECT (rtp_mux, "failed to create request pad");
356 gst_rtp_mux_release_pad (GstElement * element, GstPad * pad)
358 GstRTPMuxPadPrivate *padpriv;
360 GST_OBJECT_LOCK (element);
361 padpriv = gst_pad_get_element_private (pad);
362 gst_pad_set_element_private (pad, NULL);
363 GST_OBJECT_UNLOCK (element);
365 gst_element_remove_pad (element, pad);
368 g_slice_free (GstRTPMuxPadPrivate, padpriv);
372 /* Put our own timestamp-offset on the buffer */
374 gst_rtp_mux_readjust_rtp_timestamp_locked (GstRTPMux * rtp_mux,
375 GstRTPMuxPadPrivate * padpriv, GstRTPBuffer * rtpbuffer)
378 guint32 sink_ts_base = 0;
380 if (padpriv && padpriv->have_timestamp_offset)
381 sink_ts_base = padpriv->timestamp_offset;
383 ts = gst_rtp_buffer_get_timestamp (rtpbuffer) - sink_ts_base +
385 GST_LOG_OBJECT (rtp_mux, "Re-adjusting RTP ts %u to %u",
386 gst_rtp_buffer_get_timestamp (rtpbuffer), ts);
387 gst_rtp_buffer_set_timestamp (rtpbuffer, ts);
391 process_buffer_locked (GstRTPMux * rtp_mux, GstRTPMuxPadPrivate * padpriv,
392 GstRTPBuffer * rtpbuffer)
394 GstRTPMuxClass *klass = GST_RTP_MUX_GET_CLASS (rtp_mux);
396 if (klass->accept_buffer_locked)
397 if (!klass->accept_buffer_locked (rtp_mux, padpriv, rtpbuffer))
401 gst_rtp_buffer_set_seq (rtpbuffer, rtp_mux->seqnum);
403 gst_rtp_buffer_set_ssrc (rtpbuffer, rtp_mux->current_ssrc);
404 gst_rtp_mux_readjust_rtp_timestamp_locked (rtp_mux, padpriv, rtpbuffer);
405 GST_LOG_OBJECT (rtp_mux,
406 "Pushing packet size %" G_GSIZE_FORMAT ", seq=%d, ts=%u",
407 rtpbuffer->map[0].size, rtp_mux->seqnum,
408 gst_rtp_buffer_get_timestamp (rtpbuffer));
411 if (padpriv->segment.format == GST_FORMAT_TIME)
412 GST_BUFFER_PTS (rtpbuffer->buffer) =
413 gst_segment_to_running_time (&padpriv->segment, GST_FORMAT_TIME,
414 GST_BUFFER_PTS (rtpbuffer->buffer));
420 struct BufferListData
423 GstRTPMuxPadPrivate *padpriv;
428 process_list_item (GstBuffer ** buffer, guint idx, gpointer user_data)
430 struct BufferListData *bd = user_data;
431 GstRTPBuffer rtpbuffer = GST_RTP_BUFFER_INIT;
433 *buffer = gst_buffer_make_writable (*buffer);
435 gst_rtp_buffer_map (*buffer, GST_MAP_READWRITE, &rtpbuffer);
437 bd->drop = !process_buffer_locked (bd->rtp_mux, bd->padpriv, &rtpbuffer);
439 gst_rtp_buffer_unmap (&rtpbuffer);
444 if (GST_BUFFER_DURATION_IS_VALID (*buffer) &&
445 GST_BUFFER_PTS_IS_VALID (*buffer))
446 bd->rtp_mux->last_stop = GST_BUFFER_PTS (*buffer) +
447 GST_BUFFER_DURATION (*buffer);
449 bd->rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
455 gst_rtp_mux_chain_list (GstPad * pad, GstObject * parent,
456 GstBufferList * bufferlist)
460 GstRTPMuxPadPrivate *padpriv;
461 struct BufferListData bd;
463 rtp_mux = GST_RTP_MUX (parent);
465 if (gst_pad_check_reconfigure (rtp_mux->srcpad)) {
466 GstCaps *current_caps = gst_pad_get_current_caps (pad);
468 if (!gst_rtp_mux_setcaps (pad, rtp_mux, current_caps)) {
469 ret = GST_FLOW_NOT_NEGOTIATED;
470 gst_buffer_list_unref (bufferlist);
473 gst_caps_unref (current_caps);
476 GST_OBJECT_LOCK (rtp_mux);
478 padpriv = gst_pad_get_element_private (pad);
480 GST_OBJECT_UNLOCK (rtp_mux);
481 ret = GST_FLOW_NOT_LINKED;
482 gst_buffer_list_unref (bufferlist);
486 bd.rtp_mux = rtp_mux;
487 bd.padpriv = padpriv;
490 bufferlist = gst_buffer_list_make_writable (bufferlist);
491 gst_buffer_list_foreach (bufferlist, process_list_item, &bd);
493 GST_OBJECT_UNLOCK (rtp_mux);
496 gst_buffer_list_unref (bufferlist);
499 ret = gst_pad_push_list (rtp_mux->srcpad, bufferlist);
508 resend_events (GstPad * pad, GstEvent ** event, gpointer user_data)
510 GstRTPMux *rtp_mux = user_data;
512 if (GST_EVENT_TYPE (*event) == GST_EVENT_CAPS) {
515 gst_event_parse_caps (*event, &caps);
516 gst_rtp_mux_setcaps (pad, rtp_mux, caps);
518 gst_pad_push_event (rtp_mux->srcpad, gst_event_ref (*event));
525 gst_rtp_mux_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
529 GstRTPMuxPadPrivate *padpriv;
531 gboolean changed = FALSE;
532 GstRTPBuffer rtpbuffer = GST_RTP_BUFFER_INIT;
534 rtp_mux = GST_RTP_MUX (parent);
536 if (gst_pad_check_reconfigure (rtp_mux->srcpad)) {
537 GstCaps *current_caps = gst_pad_get_current_caps (pad);
539 if (!gst_rtp_mux_setcaps (pad, rtp_mux, current_caps)) {
540 ret = GST_FLOW_NOT_NEGOTIATED;
541 gst_buffer_unref (buffer);
544 gst_caps_unref (current_caps);
547 GST_OBJECT_LOCK (rtp_mux);
548 padpriv = gst_pad_get_element_private (pad);
551 GST_OBJECT_UNLOCK (rtp_mux);
552 gst_buffer_unref (buffer);
553 return GST_FLOW_NOT_LINKED;
556 buffer = gst_buffer_make_writable (buffer);
558 if (!gst_rtp_buffer_map (buffer, GST_MAP_READWRITE, &rtpbuffer)) {
559 GST_OBJECT_UNLOCK (rtp_mux);
560 gst_buffer_unref (buffer);
561 GST_ERROR_OBJECT (rtp_mux, "Invalid RTP buffer");
562 return GST_FLOW_ERROR;
565 drop = !process_buffer_locked (rtp_mux, padpriv, &rtpbuffer);
567 gst_rtp_buffer_unmap (&rtpbuffer);
570 if (pad != rtp_mux->last_pad) {
572 g_clear_object (&rtp_mux->last_pad);
573 rtp_mux->last_pad = g_object_ref (pad);
576 if (GST_BUFFER_DURATION_IS_VALID (buffer) &&
577 GST_BUFFER_PTS_IS_VALID (buffer))
578 rtp_mux->last_stop = GST_BUFFER_PTS (buffer) +
579 GST_BUFFER_DURATION (buffer);
581 rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
584 GST_OBJECT_UNLOCK (rtp_mux);
587 gst_pad_sticky_events_foreach (pad, resend_events, rtp_mux);
590 gst_buffer_unref (buffer);
593 ret = gst_pad_push (rtp_mux->srcpad, buffer);
601 gst_rtp_mux_setcaps (GstPad * pad, GstRTPMux * rtp_mux, GstCaps * caps)
603 GstStructure *structure;
604 gboolean ret = FALSE;
605 GstRTPMuxPadPrivate *padpriv;
608 if (!gst_caps_is_fixed (caps))
611 peercaps = gst_pad_peer_query_caps (rtp_mux->srcpad, NULL);
613 GstCaps *tcaps, *othercaps;;
614 tcaps = gst_pad_get_pad_template_caps (pad);
615 othercaps = gst_caps_intersect_full (peercaps, tcaps,
616 GST_CAPS_INTERSECT_FIRST);
618 if (gst_caps_get_size (othercaps) > 0) {
619 structure = gst_caps_get_structure (othercaps, 0);
620 GST_OBJECT_LOCK (rtp_mux);
621 if (gst_structure_get_uint (structure, "ssrc", &rtp_mux->current_ssrc)) {
622 GST_DEBUG_OBJECT (pad, "Use downstream ssrc: %x",
623 rtp_mux->current_ssrc);
624 rtp_mux->have_ssrc = TRUE;
626 GST_OBJECT_UNLOCK (rtp_mux);
629 gst_caps_unref (othercaps);
631 gst_caps_unref (peercaps);
632 gst_caps_unref (tcaps);
635 structure = gst_caps_get_structure (caps, 0);
640 GST_OBJECT_LOCK (rtp_mux);
641 padpriv = gst_pad_get_element_private (pad);
643 gst_structure_get_uint (structure, "timestamp-offset",
644 &padpriv->timestamp_offset)) {
645 padpriv->have_timestamp_offset = TRUE;
648 caps = gst_caps_copy (caps);
650 /* if we don't have a specified ssrc, first try to take one from the caps,
651 and if that fails, generate one */
652 if (!rtp_mux->have_ssrc) {
653 if (rtp_mux->ssrc_random) {
654 if (!gst_structure_get_uint (structure, "ssrc", &rtp_mux->current_ssrc))
655 rtp_mux->current_ssrc = g_random_int ();
656 rtp_mux->have_ssrc = TRUE;
660 gst_caps_set_simple (caps,
661 "timestamp-offset", G_TYPE_UINT, rtp_mux->ts_base,
662 "seqnum-offset", G_TYPE_UINT, rtp_mux->seqnum_base,
663 "ssrc", G_TYPE_UINT, rtp_mux->current_ssrc, NULL);
665 GST_OBJECT_UNLOCK (rtp_mux);
667 if (rtp_mux->send_stream_start) {
670 /* stream-start (FIXME: create id based on input ids) */
671 g_snprintf (s_id, sizeof (s_id), "interleave-%08x", g_random_int ());
672 gst_pad_push_event (rtp_mux->srcpad, gst_event_new_stream_start (s_id));
674 rtp_mux->send_stream_start = FALSE;
677 GST_DEBUG_OBJECT (rtp_mux,
678 "setting caps %" GST_PTR_FORMAT " on src pad..", caps);
679 ret = gst_pad_set_caps (rtp_mux->srcpad, caps);
682 gst_caps_unref (caps);
688 clear_caps (GstCaps * caps, gboolean only_clock_rate)
692 /* Lets only match on the clock-rate */
693 for (i = 0; i < gst_caps_get_size (caps); i++) {
694 GstStructure *s = gst_caps_get_structure (caps, i);
696 for (j = 0; j < gst_structure_n_fields (s); j++) {
697 const gchar *name = gst_structure_nth_field_name (s, j);
699 if (strcmp (name, "clock-rate") && (only_clock_rate ||
700 (strcmp (name, "ssrc")))) {
701 gst_structure_remove_field (s, name);
709 same_clock_rate_fold (const GValue * item, GValue * ret, gpointer user_data)
711 GstPad *mypad = user_data;
712 GstPad *pad = g_value_get_object (item);
719 accumcaps = g_value_get_boxed (ret);
720 peercaps = gst_pad_peer_query_caps (pad, accumcaps);
722 g_warning ("no peercaps");
725 peercaps = gst_caps_make_writable (peercaps);
726 clear_caps (peercaps, TRUE);
728 g_value_take_boxed (ret, peercaps);
730 return !gst_caps_is_empty (peercaps);
734 gst_rtp_mux_getcaps (GstPad * pad, GstRTPMux * mux, GstCaps * filter)
736 GstCaps *caps = NULL;
737 GstIterator *iter = NULL;
739 GstIteratorResult res;
744 peercaps = gst_pad_peer_query_caps (mux->srcpad, NULL);
747 tcaps = gst_pad_get_pad_template_caps (pad);
748 othercaps = gst_caps_intersect_full (peercaps, tcaps,
749 GST_CAPS_INTERSECT_FIRST);
750 gst_caps_unref (peercaps);
752 tcaps = gst_pad_get_pad_template_caps (mux->srcpad);
754 othercaps = gst_caps_intersect_full (filter, tcaps,
755 GST_CAPS_INTERSECT_FIRST);
757 othercaps = gst_caps_copy (tcaps);
759 gst_caps_unref (tcaps);
761 GST_LOG_OBJECT (pad, "Intersected srcpad-peercaps and template caps: %"
762 GST_PTR_FORMAT, othercaps);
764 clear_caps (othercaps, TRUE);
766 g_value_init (&v, GST_TYPE_CAPS);
768 iter = gst_element_iterate_sink_pads (GST_ELEMENT (mux));
770 gst_value_set_caps (&v, othercaps);
771 res = gst_iterator_fold (iter, same_clock_rate_fold, &v, pad);
772 gst_iterator_resync (iter);
773 } while (res == GST_ITERATOR_RESYNC);
774 gst_iterator_free (iter);
776 caps = gst_caps_intersect ((GstCaps *) gst_value_get_caps (&v), othercaps);
779 gst_caps_unref (othercaps);
781 if (res == GST_ITERATOR_ERROR) {
782 gst_caps_unref (caps);
783 caps = gst_caps_new_empty ();
791 gst_rtp_mux_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
793 GstRTPMux *mux = GST_RTP_MUX (parent);
794 gboolean res = FALSE;
796 switch (GST_QUERY_TYPE (query)) {
799 GstCaps *filter, *caps;
801 gst_query_parse_caps (query, &filter);
802 GST_LOG_OBJECT (pad, "Received caps-query with filter-caps: %"
803 GST_PTR_FORMAT, filter);
804 caps = gst_rtp_mux_getcaps (pad, mux, filter);
805 gst_query_set_caps_result (query, caps);
806 GST_LOG_OBJECT (mux, "Answering caps-query with caps: %"
807 GST_PTR_FORMAT, caps);
808 gst_caps_unref (caps);
813 res = gst_pad_query_default (pad, parent, query);
821 gst_rtp_mux_get_property (GObject * object,
822 guint prop_id, GValue * value, GParamSpec * pspec)
826 rtp_mux = GST_RTP_MUX (object);
828 GST_OBJECT_LOCK (rtp_mux);
830 case PROP_TIMESTAMP_OFFSET:
831 g_value_set_int (value, rtp_mux->ts_offset);
833 case PROP_SEQNUM_OFFSET:
834 g_value_set_int (value, rtp_mux->seqnum_offset);
837 g_value_set_uint (value, rtp_mux->seqnum);
840 g_value_set_uint (value, rtp_mux->ssrc);
843 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
846 GST_OBJECT_UNLOCK (rtp_mux);
850 gst_rtp_mux_set_property (GObject * object,
851 guint prop_id, const GValue * value, GParamSpec * pspec)
855 rtp_mux = GST_RTP_MUX (object);
858 case PROP_TIMESTAMP_OFFSET:
859 rtp_mux->ts_offset = g_value_get_int (value);
861 case PROP_SEQNUM_OFFSET:
862 rtp_mux->seqnum_offset = g_value_get_int (value);
865 GST_OBJECT_LOCK (rtp_mux);
866 rtp_mux->ssrc = g_value_get_uint (value);
867 rtp_mux->current_ssrc = rtp_mux->ssrc;
868 rtp_mux->have_ssrc = TRUE;
869 rtp_mux->ssrc_random = FALSE;
870 GST_OBJECT_UNLOCK (rtp_mux);
873 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
879 gst_rtp_mux_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
881 GstRTPMux *mux = GST_RTP_MUX (parent);
885 switch (GST_EVENT_TYPE (event)) {
890 gst_event_parse_caps (event, &caps);
891 GST_LOG_OBJECT (pad, "Received caps-event with caps: %"
892 GST_PTR_FORMAT, caps);
893 ret = gst_rtp_mux_setcaps (pad, mux, caps);
894 gst_event_unref (event);
897 case GST_EVENT_FLUSH_STOP:
899 GST_OBJECT_LOCK (mux);
900 mux->last_stop = GST_CLOCK_TIME_NONE;
901 GST_OBJECT_UNLOCK (mux);
904 case GST_EVENT_SEGMENT:
906 GstRTPMuxPadPrivate *padpriv;
908 GST_OBJECT_LOCK (mux);
909 padpriv = gst_pad_get_element_private (pad);
912 gst_event_copy_segment (event, &padpriv->segment);
914 GST_OBJECT_UNLOCK (mux);
921 GST_OBJECT_LOCK (mux);
922 is_pad = (pad == mux->last_pad);
923 GST_OBJECT_UNLOCK (mux);
926 return gst_pad_push_event (mux->srcpad, event);
928 gst_event_unref (event);
934 gst_rtp_mux_ready_to_paused (GstRTPMux * rtp_mux)
937 GST_OBJECT_LOCK (rtp_mux);
939 g_clear_object (&rtp_mux->last_pad);
940 rtp_mux->send_stream_start = TRUE;
942 if (rtp_mux->seqnum_offset == -1)
943 rtp_mux->seqnum_base = g_random_int_range (0, G_MAXUINT16);
945 rtp_mux->seqnum_base = rtp_mux->seqnum_offset;
946 rtp_mux->seqnum = rtp_mux->seqnum_base;
948 if (rtp_mux->ts_offset == -1)
949 rtp_mux->ts_base = g_random_int ();
951 rtp_mux->ts_base = rtp_mux->ts_offset;
953 rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
955 if (rtp_mux->ssrc_random) {
956 rtp_mux->have_ssrc = FALSE;
958 rtp_mux->current_ssrc = rtp_mux->ssrc;
959 rtp_mux->have_ssrc = TRUE;
962 GST_DEBUG_OBJECT (rtp_mux, "set timestamp-offset to %u", rtp_mux->ts_base);
964 GST_OBJECT_UNLOCK (rtp_mux);
967 static GstStateChangeReturn
968 gst_rtp_mux_change_state (GstElement * element, GstStateChange transition)
971 GstStateChangeReturn ret;
973 rtp_mux = GST_RTP_MUX (element);
975 switch (transition) {
976 case GST_STATE_CHANGE_READY_TO_PAUSED:
977 gst_rtp_mux_ready_to_paused (rtp_mux);
983 ret = GST_ELEMENT_CLASS (gst_rtp_mux_parent_class)->change_state (element,
986 switch (transition) {
987 case GST_STATE_CHANGE_PAUSED_TO_READY:
988 g_clear_object (&rtp_mux->last_pad);
998 gst_rtp_mux_plugin_init (GstPlugin * plugin)
1000 GST_DEBUG_CATEGORY_INIT (gst_rtp_mux_debug, "rtpmux", 0, "rtp muxer");
1002 return gst_element_register (plugin, "rtpmux", GST_RANK_NONE,