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_static_pad_template (gstelement_class, &src_factory);
129 gst_element_class_add_static_pad_template (gstelement_class, &sink_factory);
131 gst_element_class_set_static_metadata (gstelement_class, "RTP muxer",
133 "multiplex N rtp streams into one", "Zeeshan Ali <first.last@nokia.com>");
135 gobject_class->get_property = gst_rtp_mux_get_property;
136 gobject_class->set_property = gst_rtp_mux_set_property;
137 gobject_class->dispose = gst_rtp_mux_dispose;
139 klass->src_event = gst_rtp_mux_src_event_real;
141 g_object_class_install_property (G_OBJECT_CLASS (klass),
142 PROP_TIMESTAMP_OFFSET, g_param_spec_int ("timestamp-offset",
144 "Offset to add to all outgoing timestamps (-1 = random)", -1,
145 G_MAXINT, DEFAULT_TIMESTAMP_OFFSET,
146 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
147 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SEQNUM_OFFSET,
148 g_param_spec_int ("seqnum-offset", "Sequence number Offset",
149 "Offset to add to all outgoing seqnum (-1 = random)", -1, G_MAXINT,
150 DEFAULT_SEQNUM_OFFSET, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
151 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SEQNUM,
152 g_param_spec_uint ("seqnum", "Sequence number",
153 "The RTP sequence number of the last processed packet",
154 0, G_MAXUINT, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
155 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SSRC,
156 g_param_spec_uint ("ssrc", "SSRC",
157 "The SSRC of the packets (default == random)",
158 0, G_MAXUINT, DEFAULT_SSRC,
159 GST_PARAM_MUTABLE_PLAYING | G_PARAM_READWRITE |
160 G_PARAM_STATIC_STRINGS));
162 gstelement_class->request_new_pad =
163 GST_DEBUG_FUNCPTR (gst_rtp_mux_request_new_pad);
164 gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_rtp_mux_release_pad);
165 gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_rtp_mux_change_state);
169 gst_rtp_mux_dispose (GObject * object)
171 GstRTPMux *rtp_mux = GST_RTP_MUX (object);
174 g_clear_object (&rtp_mux->last_pad);
177 for (item = GST_ELEMENT_PADS (object); item; item = g_list_next (item)) {
178 GstPad *pad = GST_PAD (item->data);
179 if (GST_PAD_IS_SINK (pad)) {
180 gst_element_release_request_pad (GST_ELEMENT (object), pad);
185 G_OBJECT_CLASS (gst_rtp_mux_parent_class)->dispose (object);
189 gst_rtp_mux_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
191 GstRTPMux *rtp_mux = GST_RTP_MUX (parent);
192 GstRTPMuxClass *klass;
195 klass = GST_RTP_MUX_GET_CLASS (rtp_mux);
197 ret = klass->src_event (rtp_mux, event);
203 gst_rtp_mux_src_event_real (GstRTPMux * rtp_mux, GstEvent * event)
205 switch (GST_EVENT_TYPE (event)) {
206 case GST_EVENT_CUSTOM_UPSTREAM:
208 const GstStructure *s = gst_event_get_structure (event);
210 if (gst_structure_has_name (s, "GstRTPCollision")) {
213 if (!gst_structure_get_uint (s, "ssrc", &ssrc))
216 GST_DEBUG_OBJECT (rtp_mux, "collided ssrc: %" G_GUINT32_FORMAT, ssrc);
218 /* choose another ssrc for our stream */
219 GST_OBJECT_LOCK (rtp_mux);
220 if (ssrc == rtp_mux->current_ssrc) {
222 guint suggested_ssrc = 0;
225 if (gst_structure_get_uint (s, "suggested-ssrc", &suggested_ssrc))
226 rtp_mux->current_ssrc = suggested_ssrc;
228 while (ssrc == rtp_mux->current_ssrc)
229 rtp_mux->current_ssrc = g_random_int ();
231 new_ssrc = rtp_mux->current_ssrc;
232 GST_OBJECT_UNLOCK (rtp_mux);
234 caps = gst_pad_get_current_caps (rtp_mux->srcpad);
235 caps = gst_caps_make_writable (caps);
236 gst_caps_set_simple (caps, "ssrc", G_TYPE_UINT, new_ssrc, NULL);
237 gst_pad_set_caps (rtp_mux->srcpad, caps);
238 gst_caps_unref (caps);
240 GST_OBJECT_UNLOCK (rtp_mux);
250 return gst_pad_event_default (rtp_mux->srcpad, GST_OBJECT (rtp_mux), event);
254 gst_rtp_mux_init (GstRTPMux * rtp_mux)
256 GstElementClass *klass = GST_ELEMENT_GET_CLASS (rtp_mux);
259 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
261 gst_pad_set_event_function (rtp_mux->srcpad,
262 GST_DEBUG_FUNCPTR (gst_rtp_mux_src_event));
263 gst_pad_use_fixed_caps (rtp_mux->srcpad);
264 gst_element_add_pad (GST_ELEMENT (rtp_mux), rtp_mux->srcpad);
266 rtp_mux->ssrc = DEFAULT_SSRC;
267 rtp_mux->current_ssrc = DEFAULT_SSRC;
268 rtp_mux->ssrc_random = TRUE;
269 rtp_mux->ts_offset = DEFAULT_TIMESTAMP_OFFSET;
270 rtp_mux->seqnum_offset = DEFAULT_SEQNUM_OFFSET;
272 rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
276 gst_rtp_mux_setup_sinkpad (GstRTPMux * rtp_mux, GstPad * sinkpad)
278 GstRTPMuxPadPrivate *padpriv = g_slice_new0 (GstRTPMuxPadPrivate);
280 /* setup some pad functions */
281 gst_pad_set_chain_function (sinkpad, GST_DEBUG_FUNCPTR (gst_rtp_mux_chain));
282 gst_pad_set_chain_list_function (sinkpad,
283 GST_DEBUG_FUNCPTR (gst_rtp_mux_chain_list));
284 gst_pad_set_event_function (sinkpad,
285 GST_DEBUG_FUNCPTR (gst_rtp_mux_sink_event));
286 gst_pad_set_query_function (sinkpad,
287 GST_DEBUG_FUNCPTR (gst_rtp_mux_sink_query));
290 gst_segment_init (&padpriv->segment, GST_FORMAT_UNDEFINED);
292 gst_pad_set_element_private (sinkpad, padpriv);
294 gst_pad_set_active (sinkpad, TRUE);
295 gst_element_add_pad (GST_ELEMENT (rtp_mux), sinkpad);
299 gst_rtp_mux_request_new_pad (GstElement * element,
300 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
305 g_return_val_if_fail (templ != NULL, NULL);
306 g_return_val_if_fail (GST_IS_RTP_MUX (element), NULL);
308 rtp_mux = GST_RTP_MUX (element);
310 if (templ->direction != GST_PAD_SINK) {
311 GST_WARNING_OBJECT (rtp_mux, "request pad that is not a SINK pad");
315 newpad = gst_pad_new_from_template (templ, req_name);
317 gst_rtp_mux_setup_sinkpad (rtp_mux, newpad);
319 GST_WARNING_OBJECT (rtp_mux, "failed to create request pad");
325 gst_rtp_mux_release_pad (GstElement * element, GstPad * pad)
327 GstRTPMuxPadPrivate *padpriv;
329 GST_OBJECT_LOCK (element);
330 padpriv = gst_pad_get_element_private (pad);
331 gst_pad_set_element_private (pad, NULL);
332 GST_OBJECT_UNLOCK (element);
334 gst_element_remove_pad (element, pad);
337 g_slice_free (GstRTPMuxPadPrivate, padpriv);
341 /* Put our own timestamp-offset on the buffer */
343 gst_rtp_mux_readjust_rtp_timestamp_locked (GstRTPMux * rtp_mux,
344 GstRTPMuxPadPrivate * padpriv, GstRTPBuffer * rtpbuffer)
347 guint32 sink_ts_base = 0;
349 if (padpriv && padpriv->have_timestamp_offset)
350 sink_ts_base = padpriv->timestamp_offset;
352 ts = gst_rtp_buffer_get_timestamp (rtpbuffer) - sink_ts_base +
354 GST_LOG_OBJECT (rtp_mux, "Re-adjusting RTP ts %u to %u",
355 gst_rtp_buffer_get_timestamp (rtpbuffer), ts);
356 gst_rtp_buffer_set_timestamp (rtpbuffer, ts);
360 process_buffer_locked (GstRTPMux * rtp_mux, GstRTPMuxPadPrivate * padpriv,
361 GstRTPBuffer * rtpbuffer)
363 GstRTPMuxClass *klass = GST_RTP_MUX_GET_CLASS (rtp_mux);
365 if (klass->accept_buffer_locked)
366 if (!klass->accept_buffer_locked (rtp_mux, padpriv, rtpbuffer))
370 gst_rtp_buffer_set_seq (rtpbuffer, rtp_mux->seqnum);
372 gst_rtp_buffer_set_ssrc (rtpbuffer, rtp_mux->current_ssrc);
373 gst_rtp_mux_readjust_rtp_timestamp_locked (rtp_mux, padpriv, rtpbuffer);
374 GST_LOG_OBJECT (rtp_mux,
375 "Pushing packet size %" G_GSIZE_FORMAT ", seq=%d, ts=%u",
376 rtpbuffer->map[0].size, rtp_mux->seqnum,
377 gst_rtp_buffer_get_timestamp (rtpbuffer));
380 if (padpriv->segment.format == GST_FORMAT_TIME)
381 GST_BUFFER_PTS (rtpbuffer->buffer) =
382 gst_segment_to_running_time (&padpriv->segment, GST_FORMAT_TIME,
383 GST_BUFFER_PTS (rtpbuffer->buffer));
389 struct BufferListData
392 GstRTPMuxPadPrivate *padpriv;
397 process_list_item (GstBuffer ** buffer, guint idx, gpointer user_data)
399 struct BufferListData *bd = user_data;
400 GstRTPBuffer rtpbuffer = GST_RTP_BUFFER_INIT;
402 *buffer = gst_buffer_make_writable (*buffer);
404 gst_rtp_buffer_map (*buffer, GST_MAP_READWRITE, &rtpbuffer);
406 bd->drop = !process_buffer_locked (bd->rtp_mux, bd->padpriv, &rtpbuffer);
408 gst_rtp_buffer_unmap (&rtpbuffer);
413 if (GST_BUFFER_DURATION_IS_VALID (*buffer) &&
414 GST_BUFFER_PTS_IS_VALID (*buffer))
415 bd->rtp_mux->last_stop = GST_BUFFER_PTS (*buffer) +
416 GST_BUFFER_DURATION (*buffer);
418 bd->rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
423 static gboolean resend_events (GstPad * pad, GstEvent ** event,
427 gst_rtp_mux_chain_list (GstPad * pad, GstObject * parent,
428 GstBufferList * bufferlist)
432 GstRTPMuxPadPrivate *padpriv;
433 gboolean changed = FALSE;
434 struct BufferListData bd;
436 rtp_mux = GST_RTP_MUX (parent);
438 if (gst_pad_check_reconfigure (rtp_mux->srcpad)) {
439 GstCaps *current_caps = gst_pad_get_current_caps (pad);
441 if (!gst_rtp_mux_setcaps (pad, rtp_mux, current_caps)) {
442 ret = GST_FLOW_NOT_NEGOTIATED;
443 gst_buffer_list_unref (bufferlist);
446 gst_caps_unref (current_caps);
449 GST_OBJECT_LOCK (rtp_mux);
451 padpriv = gst_pad_get_element_private (pad);
453 GST_OBJECT_UNLOCK (rtp_mux);
454 ret = GST_FLOW_NOT_LINKED;
455 gst_buffer_list_unref (bufferlist);
459 bd.rtp_mux = rtp_mux;
460 bd.padpriv = padpriv;
463 bufferlist = gst_buffer_list_make_writable (bufferlist);
464 gst_buffer_list_foreach (bufferlist, process_list_item, &bd);
466 if (!bd.drop && pad != rtp_mux->last_pad) {
468 g_clear_object (&rtp_mux->last_pad);
469 rtp_mux->last_pad = g_object_ref (pad);
472 GST_OBJECT_UNLOCK (rtp_mux);
475 gst_pad_sticky_events_foreach (pad, resend_events, rtp_mux);
478 gst_buffer_list_unref (bufferlist);
481 ret = gst_pad_push_list (rtp_mux->srcpad, bufferlist);
490 resend_events (GstPad * pad, GstEvent ** event, gpointer user_data)
492 GstRTPMux *rtp_mux = user_data;
494 if (GST_EVENT_TYPE (*event) == GST_EVENT_CAPS) {
497 gst_event_parse_caps (*event, &caps);
498 gst_rtp_mux_setcaps (pad, rtp_mux, caps);
500 gst_pad_push_event (rtp_mux->srcpad, gst_event_ref (*event));
507 gst_rtp_mux_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
511 GstRTPMuxPadPrivate *padpriv;
513 gboolean changed = FALSE;
514 GstRTPBuffer rtpbuffer = GST_RTP_BUFFER_INIT;
516 rtp_mux = GST_RTP_MUX (parent);
518 if (gst_pad_check_reconfigure (rtp_mux->srcpad)) {
519 GstCaps *current_caps = gst_pad_get_current_caps (pad);
521 if (!gst_rtp_mux_setcaps (pad, rtp_mux, current_caps)) {
522 ret = GST_FLOW_NOT_NEGOTIATED;
523 gst_buffer_unref (buffer);
526 gst_caps_unref (current_caps);
529 GST_OBJECT_LOCK (rtp_mux);
530 padpriv = gst_pad_get_element_private (pad);
533 GST_OBJECT_UNLOCK (rtp_mux);
534 gst_buffer_unref (buffer);
535 return GST_FLOW_NOT_LINKED;
538 buffer = gst_buffer_make_writable (buffer);
540 if (!gst_rtp_buffer_map (buffer, GST_MAP_READWRITE, &rtpbuffer)) {
541 GST_OBJECT_UNLOCK (rtp_mux);
542 gst_buffer_unref (buffer);
543 GST_ERROR_OBJECT (rtp_mux, "Invalid RTP buffer");
544 return GST_FLOW_ERROR;
547 drop = !process_buffer_locked (rtp_mux, padpriv, &rtpbuffer);
549 gst_rtp_buffer_unmap (&rtpbuffer);
552 if (pad != rtp_mux->last_pad) {
554 g_clear_object (&rtp_mux->last_pad);
555 rtp_mux->last_pad = g_object_ref (pad);
558 if (GST_BUFFER_DURATION_IS_VALID (buffer) &&
559 GST_BUFFER_PTS_IS_VALID (buffer))
560 rtp_mux->last_stop = GST_BUFFER_PTS (buffer) +
561 GST_BUFFER_DURATION (buffer);
563 rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
566 GST_OBJECT_UNLOCK (rtp_mux);
569 gst_pad_sticky_events_foreach (pad, resend_events, rtp_mux);
572 gst_buffer_unref (buffer);
575 ret = gst_pad_push (rtp_mux->srcpad, buffer);
583 gst_rtp_mux_setcaps (GstPad * pad, GstRTPMux * rtp_mux, GstCaps * caps)
585 GstStructure *structure;
586 gboolean ret = FALSE;
587 GstRTPMuxPadPrivate *padpriv;
590 if (!gst_caps_is_fixed (caps))
593 peercaps = gst_pad_peer_query_caps (rtp_mux->srcpad, NULL);
595 GstCaps *tcaps, *othercaps;;
596 tcaps = gst_pad_get_pad_template_caps (pad);
597 othercaps = gst_caps_intersect_full (peercaps, tcaps,
598 GST_CAPS_INTERSECT_FIRST);
600 if (gst_caps_get_size (othercaps) > 0) {
601 structure = gst_caps_get_structure (othercaps, 0);
602 GST_OBJECT_LOCK (rtp_mux);
603 if (gst_structure_get_uint (structure, "ssrc", &rtp_mux->current_ssrc)) {
604 GST_DEBUG_OBJECT (pad, "Use downstream ssrc: %x",
605 rtp_mux->current_ssrc);
606 rtp_mux->have_ssrc = TRUE;
608 GST_OBJECT_UNLOCK (rtp_mux);
611 gst_caps_unref (othercaps);
613 gst_caps_unref (peercaps);
614 gst_caps_unref (tcaps);
617 structure = gst_caps_get_structure (caps, 0);
622 GST_OBJECT_LOCK (rtp_mux);
623 padpriv = gst_pad_get_element_private (pad);
625 gst_structure_get_uint (structure, "timestamp-offset",
626 &padpriv->timestamp_offset)) {
627 padpriv->have_timestamp_offset = TRUE;
630 caps = gst_caps_copy (caps);
632 /* if we don't have a specified ssrc, first try to take one from the caps,
633 and if that fails, generate one */
634 if (!rtp_mux->have_ssrc) {
635 if (rtp_mux->ssrc_random) {
636 if (!gst_structure_get_uint (structure, "ssrc", &rtp_mux->current_ssrc))
637 rtp_mux->current_ssrc = g_random_int ();
638 rtp_mux->have_ssrc = TRUE;
642 gst_caps_set_simple (caps,
643 "timestamp-offset", G_TYPE_UINT, rtp_mux->ts_base,
644 "seqnum-offset", G_TYPE_UINT, rtp_mux->seqnum_base,
645 "ssrc", G_TYPE_UINT, rtp_mux->current_ssrc, NULL);
647 GST_OBJECT_UNLOCK (rtp_mux);
649 if (rtp_mux->send_stream_start) {
652 /* stream-start (FIXME: create id based on input ids) */
653 g_snprintf (s_id, sizeof (s_id), "interleave-%08x", g_random_int ());
654 gst_pad_push_event (rtp_mux->srcpad, gst_event_new_stream_start (s_id));
656 rtp_mux->send_stream_start = FALSE;
659 GST_DEBUG_OBJECT (rtp_mux,
660 "setting caps %" GST_PTR_FORMAT " on src pad..", caps);
661 ret = gst_pad_set_caps (rtp_mux->srcpad, caps);
664 gst_caps_unref (caps);
670 clear_caps (GstCaps * caps, gboolean only_clock_rate)
674 /* Lets only match on the clock-rate */
675 for (i = 0; i < gst_caps_get_size (caps); i++) {
676 GstStructure *s = gst_caps_get_structure (caps, i);
678 for (j = 0; j < gst_structure_n_fields (s); j++) {
679 const gchar *name = gst_structure_nth_field_name (s, j);
681 if (strcmp (name, "clock-rate") && (only_clock_rate ||
682 (strcmp (name, "ssrc")))) {
683 gst_structure_remove_field (s, name);
691 same_clock_rate_fold (const GValue * item, GValue * ret, gpointer user_data)
693 GstPad *mypad = user_data;
694 GstPad *pad = g_value_get_object (item);
701 accumcaps = g_value_get_boxed (ret);
702 peercaps = gst_pad_peer_query_caps (pad, accumcaps);
704 g_warning ("no peercaps");
707 peercaps = gst_caps_make_writable (peercaps);
708 clear_caps (peercaps, TRUE);
710 g_value_take_boxed (ret, peercaps);
712 return !gst_caps_is_empty (peercaps);
716 gst_rtp_mux_getcaps (GstPad * pad, GstRTPMux * mux, GstCaps * filter)
718 GstCaps *caps = NULL;
719 GstIterator *iter = NULL;
721 GstIteratorResult res;
726 peercaps = gst_pad_peer_query_caps (mux->srcpad, NULL);
729 tcaps = gst_pad_get_pad_template_caps (pad);
730 othercaps = gst_caps_intersect_full (peercaps, tcaps,
731 GST_CAPS_INTERSECT_FIRST);
732 gst_caps_unref (peercaps);
734 tcaps = gst_pad_get_pad_template_caps (mux->srcpad);
736 othercaps = gst_caps_intersect_full (filter, tcaps,
737 GST_CAPS_INTERSECT_FIRST);
739 othercaps = gst_caps_copy (tcaps);
741 gst_caps_unref (tcaps);
743 GST_LOG_OBJECT (pad, "Intersected srcpad-peercaps and template caps: %"
744 GST_PTR_FORMAT, othercaps);
746 clear_caps (othercaps, TRUE);
748 g_value_init (&v, GST_TYPE_CAPS);
750 iter = gst_element_iterate_sink_pads (GST_ELEMENT (mux));
752 gst_value_set_caps (&v, othercaps);
753 res = gst_iterator_fold (iter, same_clock_rate_fold, &v, pad);
754 gst_iterator_resync (iter);
755 } while (res == GST_ITERATOR_RESYNC);
756 gst_iterator_free (iter);
758 caps = gst_caps_intersect ((GstCaps *) gst_value_get_caps (&v), othercaps);
761 gst_caps_unref (othercaps);
763 if (res == GST_ITERATOR_ERROR) {
764 gst_caps_unref (caps);
765 caps = gst_caps_new_empty ();
773 gst_rtp_mux_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
775 GstRTPMux *mux = GST_RTP_MUX (parent);
776 gboolean res = FALSE;
778 switch (GST_QUERY_TYPE (query)) {
781 GstCaps *filter, *caps;
783 gst_query_parse_caps (query, &filter);
784 GST_LOG_OBJECT (pad, "Received caps-query with filter-caps: %"
785 GST_PTR_FORMAT, filter);
786 caps = gst_rtp_mux_getcaps (pad, mux, filter);
787 gst_query_set_caps_result (query, caps);
788 GST_LOG_OBJECT (mux, "Answering caps-query with caps: %"
789 GST_PTR_FORMAT, caps);
790 gst_caps_unref (caps);
795 res = gst_pad_query_default (pad, parent, query);
803 gst_rtp_mux_get_property (GObject * object,
804 guint prop_id, GValue * value, GParamSpec * pspec)
808 rtp_mux = GST_RTP_MUX (object);
810 GST_OBJECT_LOCK (rtp_mux);
812 case PROP_TIMESTAMP_OFFSET:
813 g_value_set_int (value, rtp_mux->ts_offset);
815 case PROP_SEQNUM_OFFSET:
816 g_value_set_int (value, rtp_mux->seqnum_offset);
819 g_value_set_uint (value, rtp_mux->seqnum);
822 g_value_set_uint (value, rtp_mux->ssrc);
825 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
828 GST_OBJECT_UNLOCK (rtp_mux);
832 gst_rtp_mux_set_property (GObject * object,
833 guint prop_id, const GValue * value, GParamSpec * pspec)
837 rtp_mux = GST_RTP_MUX (object);
840 case PROP_TIMESTAMP_OFFSET:
841 rtp_mux->ts_offset = g_value_get_int (value);
843 case PROP_SEQNUM_OFFSET:
844 rtp_mux->seqnum_offset = g_value_get_int (value);
847 GST_OBJECT_LOCK (rtp_mux);
848 rtp_mux->ssrc = g_value_get_uint (value);
849 rtp_mux->current_ssrc = rtp_mux->ssrc;
850 rtp_mux->have_ssrc = TRUE;
851 rtp_mux->ssrc_random = FALSE;
852 GST_OBJECT_UNLOCK (rtp_mux);
855 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
861 gst_rtp_mux_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
863 GstRTPMux *mux = GST_RTP_MUX (parent);
867 switch (GST_EVENT_TYPE (event)) {
872 gst_event_parse_caps (event, &caps);
873 GST_LOG_OBJECT (pad, "Received caps-event with caps: %"
874 GST_PTR_FORMAT, caps);
875 ret = gst_rtp_mux_setcaps (pad, mux, caps);
876 gst_event_unref (event);
879 case GST_EVENT_FLUSH_STOP:
881 GST_OBJECT_LOCK (mux);
882 mux->last_stop = GST_CLOCK_TIME_NONE;
883 GST_OBJECT_UNLOCK (mux);
886 case GST_EVENT_SEGMENT:
888 GstRTPMuxPadPrivate *padpriv;
890 GST_OBJECT_LOCK (mux);
891 padpriv = gst_pad_get_element_private (pad);
894 gst_event_copy_segment (event, &padpriv->segment);
896 GST_OBJECT_UNLOCK (mux);
903 GST_OBJECT_LOCK (mux);
904 is_pad = (pad == mux->last_pad);
905 GST_OBJECT_UNLOCK (mux);
908 return gst_pad_push_event (mux->srcpad, event);
910 gst_event_unref (event);
916 gst_rtp_mux_ready_to_paused (GstRTPMux * rtp_mux)
919 GST_OBJECT_LOCK (rtp_mux);
921 g_clear_object (&rtp_mux->last_pad);
922 rtp_mux->send_stream_start = TRUE;
924 if (rtp_mux->seqnum_offset == -1)
925 rtp_mux->seqnum_base = g_random_int_range (0, G_MAXUINT16);
927 rtp_mux->seqnum_base = rtp_mux->seqnum_offset;
928 rtp_mux->seqnum = rtp_mux->seqnum_base;
930 if (rtp_mux->ts_offset == -1)
931 rtp_mux->ts_base = g_random_int ();
933 rtp_mux->ts_base = rtp_mux->ts_offset;
935 rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
937 if (rtp_mux->ssrc_random) {
938 rtp_mux->have_ssrc = FALSE;
940 rtp_mux->current_ssrc = rtp_mux->ssrc;
941 rtp_mux->have_ssrc = TRUE;
944 GST_DEBUG_OBJECT (rtp_mux, "set timestamp-offset to %u", rtp_mux->ts_base);
946 GST_OBJECT_UNLOCK (rtp_mux);
949 static GstStateChangeReturn
950 gst_rtp_mux_change_state (GstElement * element, GstStateChange transition)
953 GstStateChangeReturn ret;
955 rtp_mux = GST_RTP_MUX (element);
957 switch (transition) {
958 case GST_STATE_CHANGE_READY_TO_PAUSED:
959 gst_rtp_mux_ready_to_paused (rtp_mux);
965 ret = GST_ELEMENT_CLASS (gst_rtp_mux_parent_class)->change_state (element,
968 switch (transition) {
969 case GST_STATE_CHANGE_PAUSED_TO_READY:
970 g_clear_object (&rtp_mux->last_pad);
980 gst_rtp_mux_plugin_init (GstPlugin * plugin)
982 GST_DEBUG_CATEGORY_INIT (gst_rtp_mux_debug, "rtpmux", 0, "rtp muxer");
984 return gst_element_register (plugin, "rtpmux", GST_RANK_NONE,