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)
207 switch (GST_EVENT_TYPE (event)) {
208 case GST_EVENT_CUSTOM_UPSTREAM:
210 const GstStructure *s = gst_event_get_structure (event);
212 if (gst_structure_has_name (s, "GstRTPCollision")) {
215 if (!gst_structure_get_uint (s, "ssrc", &ssrc))
218 GST_DEBUG_OBJECT (rtp_mux, "collided ssrc: %" G_GUINT32_FORMAT, ssrc);
220 /* choose another ssrc for our stream */
221 GST_OBJECT_LOCK (rtp_mux);
222 if (ssrc == rtp_mux->current_ssrc) {
224 guint suggested_ssrc = 0;
227 if (gst_structure_get_uint (s, "suggested-ssrc", &suggested_ssrc))
228 rtp_mux->current_ssrc = suggested_ssrc;
230 while (ssrc == rtp_mux->current_ssrc)
231 rtp_mux->current_ssrc = g_random_int ();
233 new_ssrc = rtp_mux->current_ssrc;
234 GST_OBJECT_UNLOCK (rtp_mux);
236 caps = gst_pad_get_current_caps (rtp_mux->srcpad);
237 caps = gst_caps_make_writable (caps);
238 gst_caps_set_simple (caps, "ssrc", G_TYPE_UINT, new_ssrc, NULL);
239 gst_pad_set_caps (rtp_mux->srcpad, caps);
240 gst_caps_unref (caps);
242 GST_OBJECT_UNLOCK (rtp_mux);
252 return gst_pad_event_default (rtp_mux->srcpad, GST_OBJECT (rtp_mux), event);
256 gst_rtp_mux_init (GstRTPMux * rtp_mux)
258 GstElementClass *klass = GST_ELEMENT_GET_CLASS (rtp_mux);
261 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
263 gst_pad_set_event_function (rtp_mux->srcpad,
264 GST_DEBUG_FUNCPTR (gst_rtp_mux_src_event));
265 gst_pad_use_fixed_caps (rtp_mux->srcpad);
266 gst_element_add_pad (GST_ELEMENT (rtp_mux), rtp_mux->srcpad);
268 rtp_mux->ssrc = DEFAULT_SSRC;
269 rtp_mux->current_ssrc = DEFAULT_SSRC;
270 rtp_mux->ssrc_random = TRUE;
271 rtp_mux->ts_offset = DEFAULT_TIMESTAMP_OFFSET;
272 rtp_mux->seqnum_offset = DEFAULT_SEQNUM_OFFSET;
274 rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
278 gst_rtp_mux_setup_sinkpad (GstRTPMux * rtp_mux, GstPad * sinkpad)
280 GstRTPMuxPadPrivate *padpriv = g_slice_new0 (GstRTPMuxPadPrivate);
282 /* setup some pad functions */
283 gst_pad_set_chain_function (sinkpad, GST_DEBUG_FUNCPTR (gst_rtp_mux_chain));
284 gst_pad_set_chain_list_function (sinkpad,
285 GST_DEBUG_FUNCPTR (gst_rtp_mux_chain_list));
286 gst_pad_set_event_function (sinkpad,
287 GST_DEBUG_FUNCPTR (gst_rtp_mux_sink_event));
288 gst_pad_set_query_function (sinkpad,
289 GST_DEBUG_FUNCPTR (gst_rtp_mux_sink_query));
292 gst_segment_init (&padpriv->segment, GST_FORMAT_UNDEFINED);
294 gst_pad_set_element_private (sinkpad, padpriv);
296 gst_pad_set_active (sinkpad, TRUE);
297 gst_element_add_pad (GST_ELEMENT (rtp_mux), sinkpad);
301 gst_rtp_mux_request_new_pad (GstElement * element,
302 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
307 g_return_val_if_fail (templ != NULL, NULL);
308 g_return_val_if_fail (GST_IS_RTP_MUX (element), NULL);
310 rtp_mux = GST_RTP_MUX (element);
312 if (templ->direction != GST_PAD_SINK) {
313 GST_WARNING_OBJECT (rtp_mux, "request pad that is not a SINK pad");
317 newpad = gst_pad_new_from_template (templ, req_name);
319 gst_rtp_mux_setup_sinkpad (rtp_mux, newpad);
321 GST_WARNING_OBJECT (rtp_mux, "failed to create request pad");
327 gst_rtp_mux_release_pad (GstElement * element, GstPad * pad)
329 GstRTPMuxPadPrivate *padpriv;
331 GST_OBJECT_LOCK (element);
332 padpriv = gst_pad_get_element_private (pad);
333 gst_pad_set_element_private (pad, NULL);
334 GST_OBJECT_UNLOCK (element);
336 gst_element_remove_pad (element, pad);
339 g_slice_free (GstRTPMuxPadPrivate, padpriv);
343 /* Put our own timestamp-offset on the buffer */
345 gst_rtp_mux_readjust_rtp_timestamp_locked (GstRTPMux * rtp_mux,
346 GstRTPMuxPadPrivate * padpriv, GstRTPBuffer * rtpbuffer)
349 guint32 sink_ts_base = 0;
351 if (padpriv && padpriv->have_timestamp_offset)
352 sink_ts_base = padpriv->timestamp_offset;
354 ts = gst_rtp_buffer_get_timestamp (rtpbuffer) - sink_ts_base +
356 GST_LOG_OBJECT (rtp_mux, "Re-adjusting RTP ts %u to %u",
357 gst_rtp_buffer_get_timestamp (rtpbuffer), ts);
358 gst_rtp_buffer_set_timestamp (rtpbuffer, ts);
362 process_buffer_locked (GstRTPMux * rtp_mux, GstRTPMuxPadPrivate * padpriv,
363 GstRTPBuffer * rtpbuffer)
365 GstRTPMuxClass *klass = GST_RTP_MUX_GET_CLASS (rtp_mux);
367 if (klass->accept_buffer_locked)
368 if (!klass->accept_buffer_locked (rtp_mux, padpriv, rtpbuffer))
372 gst_rtp_buffer_set_seq (rtpbuffer, rtp_mux->seqnum);
374 gst_rtp_buffer_set_ssrc (rtpbuffer, rtp_mux->current_ssrc);
375 gst_rtp_mux_readjust_rtp_timestamp_locked (rtp_mux, padpriv, rtpbuffer);
376 GST_LOG_OBJECT (rtp_mux,
377 "Pushing packet size %" G_GSIZE_FORMAT ", seq=%d, ts=%u",
378 rtpbuffer->map[0].size, rtp_mux->seqnum,
379 gst_rtp_buffer_get_timestamp (rtpbuffer));
382 if (padpriv->segment.format == GST_FORMAT_TIME)
383 GST_BUFFER_PTS (rtpbuffer->buffer) =
384 gst_segment_to_running_time (&padpriv->segment, GST_FORMAT_TIME,
385 GST_BUFFER_PTS (rtpbuffer->buffer));
391 struct BufferListData
394 GstRTPMuxPadPrivate *padpriv;
399 process_list_item (GstBuffer ** buffer, guint idx, gpointer user_data)
401 struct BufferListData *bd = user_data;
402 GstRTPBuffer rtpbuffer = GST_RTP_BUFFER_INIT;
404 *buffer = gst_buffer_make_writable (*buffer);
406 gst_rtp_buffer_map (*buffer, GST_MAP_READWRITE, &rtpbuffer);
408 bd->drop = !process_buffer_locked (bd->rtp_mux, bd->padpriv, &rtpbuffer);
410 gst_rtp_buffer_unmap (&rtpbuffer);
415 if (GST_BUFFER_DURATION_IS_VALID (*buffer) &&
416 GST_BUFFER_PTS_IS_VALID (*buffer))
417 bd->rtp_mux->last_stop = GST_BUFFER_PTS (*buffer) +
418 GST_BUFFER_DURATION (*buffer);
420 bd->rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
426 gst_rtp_mux_chain_list (GstPad * pad, GstObject * parent,
427 GstBufferList * bufferlist)
431 GstRTPMuxPadPrivate *padpriv;
432 struct BufferListData bd;
434 rtp_mux = GST_RTP_MUX (parent);
436 if (gst_pad_check_reconfigure (rtp_mux->srcpad)) {
437 GstCaps *current_caps = gst_pad_get_current_caps (pad);
439 if (!gst_rtp_mux_setcaps (pad, rtp_mux, current_caps)) {
440 ret = GST_FLOW_NOT_NEGOTIATED;
441 gst_buffer_list_unref (bufferlist);
444 gst_caps_unref (current_caps);
447 GST_OBJECT_LOCK (rtp_mux);
449 padpriv = gst_pad_get_element_private (pad);
451 GST_OBJECT_UNLOCK (rtp_mux);
452 ret = GST_FLOW_NOT_LINKED;
453 gst_buffer_list_unref (bufferlist);
457 bd.rtp_mux = rtp_mux;
458 bd.padpriv = padpriv;
461 bufferlist = gst_buffer_list_make_writable (bufferlist);
462 gst_buffer_list_foreach (bufferlist, process_list_item, &bd);
464 GST_OBJECT_UNLOCK (rtp_mux);
467 gst_buffer_list_unref (bufferlist);
470 ret = gst_pad_push_list (rtp_mux->srcpad, bufferlist);
479 resend_events (GstPad * pad, GstEvent ** event, gpointer user_data)
481 GstRTPMux *rtp_mux = user_data;
483 if (GST_EVENT_TYPE (*event) == GST_EVENT_CAPS) {
486 gst_event_parse_caps (*event, &caps);
487 gst_rtp_mux_setcaps (pad, rtp_mux, caps);
489 gst_pad_push_event (rtp_mux->srcpad, gst_event_ref (*event));
496 gst_rtp_mux_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
500 GstRTPMuxPadPrivate *padpriv;
502 gboolean changed = FALSE;
503 GstRTPBuffer rtpbuffer = GST_RTP_BUFFER_INIT;
505 rtp_mux = GST_RTP_MUX (parent);
507 if (gst_pad_check_reconfigure (rtp_mux->srcpad)) {
508 GstCaps *current_caps = gst_pad_get_current_caps (pad);
510 if (!gst_rtp_mux_setcaps (pad, rtp_mux, current_caps)) {
511 ret = GST_FLOW_NOT_NEGOTIATED;
512 gst_buffer_unref (buffer);
515 gst_caps_unref (current_caps);
518 GST_OBJECT_LOCK (rtp_mux);
519 padpriv = gst_pad_get_element_private (pad);
522 GST_OBJECT_UNLOCK (rtp_mux);
523 gst_buffer_unref (buffer);
524 return GST_FLOW_NOT_LINKED;
527 buffer = gst_buffer_make_writable (buffer);
529 if (!gst_rtp_buffer_map (buffer, GST_MAP_READWRITE, &rtpbuffer)) {
530 GST_OBJECT_UNLOCK (rtp_mux);
531 gst_buffer_unref (buffer);
532 GST_ERROR_OBJECT (rtp_mux, "Invalid RTP buffer");
533 return GST_FLOW_ERROR;
536 drop = !process_buffer_locked (rtp_mux, padpriv, &rtpbuffer);
538 gst_rtp_buffer_unmap (&rtpbuffer);
541 if (pad != rtp_mux->last_pad) {
543 g_clear_object (&rtp_mux->last_pad);
544 rtp_mux->last_pad = g_object_ref (pad);
547 if (GST_BUFFER_DURATION_IS_VALID (buffer) &&
548 GST_BUFFER_PTS_IS_VALID (buffer))
549 rtp_mux->last_stop = GST_BUFFER_PTS (buffer) +
550 GST_BUFFER_DURATION (buffer);
552 rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
555 GST_OBJECT_UNLOCK (rtp_mux);
558 gst_pad_sticky_events_foreach (pad, resend_events, rtp_mux);
561 gst_buffer_unref (buffer);
564 ret = gst_pad_push (rtp_mux->srcpad, buffer);
572 gst_rtp_mux_setcaps (GstPad * pad, GstRTPMux * rtp_mux, GstCaps * caps)
574 GstStructure *structure;
575 gboolean ret = FALSE;
576 GstRTPMuxPadPrivate *padpriv;
579 if (!gst_caps_is_fixed (caps))
582 peercaps = gst_pad_peer_query_caps (rtp_mux->srcpad, NULL);
584 GstCaps *tcaps, *othercaps;;
585 tcaps = gst_pad_get_pad_template_caps (pad);
586 othercaps = gst_caps_intersect_full (peercaps, tcaps,
587 GST_CAPS_INTERSECT_FIRST);
589 if (gst_caps_get_size (othercaps) > 0) {
590 structure = gst_caps_get_structure (othercaps, 0);
591 GST_OBJECT_LOCK (rtp_mux);
592 if (gst_structure_get_uint (structure, "ssrc", &rtp_mux->current_ssrc)) {
593 GST_DEBUG_OBJECT (pad, "Use downstream ssrc: %x",
594 rtp_mux->current_ssrc);
595 rtp_mux->have_ssrc = TRUE;
597 GST_OBJECT_UNLOCK (rtp_mux);
600 gst_caps_unref (othercaps);
602 gst_caps_unref (peercaps);
603 gst_caps_unref (tcaps);
606 structure = gst_caps_get_structure (caps, 0);
611 GST_OBJECT_LOCK (rtp_mux);
612 padpriv = gst_pad_get_element_private (pad);
614 gst_structure_get_uint (structure, "timestamp-offset",
615 &padpriv->timestamp_offset)) {
616 padpriv->have_timestamp_offset = TRUE;
619 caps = gst_caps_copy (caps);
621 /* if we don't have a specified ssrc, first try to take one from the caps,
622 and if that fails, generate one */
623 if (!rtp_mux->have_ssrc) {
624 if (rtp_mux->ssrc_random) {
625 if (!gst_structure_get_uint (structure, "ssrc", &rtp_mux->current_ssrc))
626 rtp_mux->current_ssrc = g_random_int ();
627 rtp_mux->have_ssrc = TRUE;
631 gst_caps_set_simple (caps,
632 "timestamp-offset", G_TYPE_UINT, rtp_mux->ts_base,
633 "seqnum-offset", G_TYPE_UINT, rtp_mux->seqnum_base,
634 "ssrc", G_TYPE_UINT, rtp_mux->current_ssrc, NULL);
636 GST_OBJECT_UNLOCK (rtp_mux);
638 if (rtp_mux->send_stream_start) {
641 /* stream-start (FIXME: create id based on input ids) */
642 g_snprintf (s_id, sizeof (s_id), "interleave-%08x", g_random_int ());
643 gst_pad_push_event (rtp_mux->srcpad, gst_event_new_stream_start (s_id));
645 rtp_mux->send_stream_start = FALSE;
648 GST_DEBUG_OBJECT (rtp_mux,
649 "setting caps %" GST_PTR_FORMAT " on src pad..", caps);
650 ret = gst_pad_set_caps (rtp_mux->srcpad, caps);
653 gst_caps_unref (caps);
659 clear_caps (GstCaps * caps, gboolean only_clock_rate)
663 /* Lets only match on the clock-rate */
664 for (i = 0; i < gst_caps_get_size (caps); i++) {
665 GstStructure *s = gst_caps_get_structure (caps, i);
667 for (j = 0; j < gst_structure_n_fields (s); j++) {
668 const gchar *name = gst_structure_nth_field_name (s, j);
670 if (strcmp (name, "clock-rate") && (only_clock_rate ||
671 (strcmp (name, "ssrc")))) {
672 gst_structure_remove_field (s, name);
680 same_clock_rate_fold (const GValue * item, GValue * ret, gpointer user_data)
682 GstPad *mypad = user_data;
683 GstPad *pad = g_value_get_object (item);
690 accumcaps = g_value_get_boxed (ret);
691 peercaps = gst_pad_peer_query_caps (pad, accumcaps);
693 g_warning ("no peercaps");
696 peercaps = gst_caps_make_writable (peercaps);
697 clear_caps (peercaps, TRUE);
699 g_value_take_boxed (ret, peercaps);
701 return !gst_caps_is_empty (peercaps);
705 gst_rtp_mux_getcaps (GstPad * pad, GstRTPMux * mux, GstCaps * filter)
707 GstCaps *caps = NULL;
708 GstIterator *iter = NULL;
710 GstIteratorResult res;
715 peercaps = gst_pad_peer_query_caps (mux->srcpad, NULL);
718 tcaps = gst_pad_get_pad_template_caps (pad);
719 othercaps = gst_caps_intersect_full (peercaps, tcaps,
720 GST_CAPS_INTERSECT_FIRST);
721 gst_caps_unref (peercaps);
723 tcaps = gst_pad_get_pad_template_caps (mux->srcpad);
725 othercaps = gst_caps_intersect_full (filter, tcaps,
726 GST_CAPS_INTERSECT_FIRST);
728 othercaps = gst_caps_copy (tcaps);
730 gst_caps_unref (tcaps);
732 GST_LOG_OBJECT (pad, "Intersected srcpad-peercaps and template caps: %"
733 GST_PTR_FORMAT, othercaps);
735 clear_caps (othercaps, TRUE);
737 g_value_init (&v, GST_TYPE_CAPS);
739 iter = gst_element_iterate_sink_pads (GST_ELEMENT (mux));
741 gst_value_set_caps (&v, othercaps);
742 res = gst_iterator_fold (iter, same_clock_rate_fold, &v, pad);
743 gst_iterator_resync (iter);
744 } while (res == GST_ITERATOR_RESYNC);
745 gst_iterator_free (iter);
747 caps = gst_caps_intersect ((GstCaps *) gst_value_get_caps (&v), othercaps);
750 gst_caps_unref (othercaps);
752 if (res == GST_ITERATOR_ERROR) {
753 gst_caps_unref (caps);
754 caps = gst_caps_new_empty ();
762 gst_rtp_mux_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
764 GstRTPMux *mux = GST_RTP_MUX (parent);
765 gboolean res = FALSE;
767 switch (GST_QUERY_TYPE (query)) {
770 GstCaps *filter, *caps;
772 gst_query_parse_caps (query, &filter);
773 GST_LOG_OBJECT (pad, "Received caps-query with filter-caps: %"
774 GST_PTR_FORMAT, filter);
775 caps = gst_rtp_mux_getcaps (pad, mux, filter);
776 gst_query_set_caps_result (query, caps);
777 GST_LOG_OBJECT (mux, "Answering caps-query with caps: %"
778 GST_PTR_FORMAT, caps);
779 gst_caps_unref (caps);
784 res = gst_pad_query_default (pad, parent, query);
792 gst_rtp_mux_get_property (GObject * object,
793 guint prop_id, GValue * value, GParamSpec * pspec)
797 rtp_mux = GST_RTP_MUX (object);
799 GST_OBJECT_LOCK (rtp_mux);
801 case PROP_TIMESTAMP_OFFSET:
802 g_value_set_int (value, rtp_mux->ts_offset);
804 case PROP_SEQNUM_OFFSET:
805 g_value_set_int (value, rtp_mux->seqnum_offset);
808 g_value_set_uint (value, rtp_mux->seqnum);
811 g_value_set_uint (value, rtp_mux->ssrc);
814 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
817 GST_OBJECT_UNLOCK (rtp_mux);
821 gst_rtp_mux_set_property (GObject * object,
822 guint prop_id, const GValue * value, GParamSpec * pspec)
826 rtp_mux = GST_RTP_MUX (object);
829 case PROP_TIMESTAMP_OFFSET:
830 rtp_mux->ts_offset = g_value_get_int (value);
832 case PROP_SEQNUM_OFFSET:
833 rtp_mux->seqnum_offset = g_value_get_int (value);
836 GST_OBJECT_LOCK (rtp_mux);
837 rtp_mux->ssrc = g_value_get_uint (value);
838 rtp_mux->current_ssrc = rtp_mux->ssrc;
839 rtp_mux->have_ssrc = TRUE;
840 rtp_mux->ssrc_random = FALSE;
841 GST_OBJECT_UNLOCK (rtp_mux);
844 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
850 gst_rtp_mux_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
852 GstRTPMux *mux = GST_RTP_MUX (parent);
856 switch (GST_EVENT_TYPE (event)) {
861 gst_event_parse_caps (event, &caps);
862 GST_LOG_OBJECT (pad, "Received caps-event with caps: %"
863 GST_PTR_FORMAT, caps);
864 ret = gst_rtp_mux_setcaps (pad, mux, caps);
865 gst_event_unref (event);
868 case GST_EVENT_FLUSH_STOP:
870 GST_OBJECT_LOCK (mux);
871 mux->last_stop = GST_CLOCK_TIME_NONE;
872 GST_OBJECT_UNLOCK (mux);
875 case GST_EVENT_SEGMENT:
877 GstRTPMuxPadPrivate *padpriv;
879 GST_OBJECT_LOCK (mux);
880 padpriv = gst_pad_get_element_private (pad);
883 gst_event_copy_segment (event, &padpriv->segment);
885 GST_OBJECT_UNLOCK (mux);
892 GST_OBJECT_LOCK (mux);
893 is_pad = (pad == mux->last_pad);
894 GST_OBJECT_UNLOCK (mux);
897 return gst_pad_push_event (mux->srcpad, event);
899 gst_event_unref (event);
905 gst_rtp_mux_ready_to_paused (GstRTPMux * rtp_mux)
908 GST_OBJECT_LOCK (rtp_mux);
910 g_clear_object (&rtp_mux->last_pad);
911 rtp_mux->send_stream_start = TRUE;
913 if (rtp_mux->seqnum_offset == -1)
914 rtp_mux->seqnum_base = g_random_int_range (0, G_MAXUINT16);
916 rtp_mux->seqnum_base = rtp_mux->seqnum_offset;
917 rtp_mux->seqnum = rtp_mux->seqnum_base;
919 if (rtp_mux->ts_offset == -1)
920 rtp_mux->ts_base = g_random_int ();
922 rtp_mux->ts_base = rtp_mux->ts_offset;
924 rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
926 if (rtp_mux->ssrc_random) {
927 rtp_mux->have_ssrc = FALSE;
929 rtp_mux->current_ssrc = rtp_mux->ssrc;
930 rtp_mux->have_ssrc = TRUE;
933 GST_DEBUG_OBJECT (rtp_mux, "set timestamp-offset to %u", rtp_mux->ts_base);
935 GST_OBJECT_UNLOCK (rtp_mux);
938 static GstStateChangeReturn
939 gst_rtp_mux_change_state (GstElement * element, GstStateChange transition)
942 GstStateChangeReturn ret;
944 rtp_mux = GST_RTP_MUX (element);
946 switch (transition) {
947 case GST_STATE_CHANGE_READY_TO_PAUSED:
948 gst_rtp_mux_ready_to_paused (rtp_mux);
954 ret = GST_ELEMENT_CLASS (gst_rtp_mux_parent_class)->change_state (element,
957 switch (transition) {
958 case GST_STATE_CHANGE_PAUSED_TO_READY:
959 g_clear_object (&rtp_mux->last_pad);
969 gst_rtp_mux_plugin_init (GstPlugin * plugin)
971 GST_DEBUG_CATEGORY_INIT (gst_rtp_mux_debug, "rtpmux", 0, "rtp muxer");
973 return gst_element_register (plugin, "rtpmux", GST_RANK_NONE,