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;
127 gst_element_class_add_static_pad_template (gstelement_class, &src_factory);
128 gst_element_class_add_static_pad_template (gstelement_class, &sink_factory);
130 gst_element_class_set_static_metadata (gstelement_class, "RTP muxer",
132 "multiplex N rtp streams into one", "Zeeshan Ali <first.last@nokia.com>");
134 gobject_class->get_property = gst_rtp_mux_get_property;
135 gobject_class->set_property = gst_rtp_mux_set_property;
136 gobject_class->dispose = gst_rtp_mux_dispose;
138 klass->src_event = gst_rtp_mux_src_event_real;
140 g_object_class_install_property (gobject_class, PROP_TIMESTAMP_OFFSET,
141 g_param_spec_int64 ("timestamp-offset", "Timestamp Offset",
142 "Offset to add to all outgoing timestamps (-1 = random)",
143 -1, G_MAXUINT32, DEFAULT_TIMESTAMP_OFFSET,
144 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
146 g_object_class_install_property (gobject_class, PROP_SEQNUM_OFFSET,
147 g_param_spec_int ("seqnum-offset", "Sequence number Offset",
148 "Offset to add to all outgoing seqnum (-1 = random)",
149 -1, G_MAXUINT16, DEFAULT_SEQNUM_OFFSET,
150 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
152 g_object_class_install_property (gobject_class, PROP_SEQNUM,
153 g_param_spec_uint ("seqnum", "Sequence number",
154 "The RTP sequence number of the last processed packet",
156 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
158 g_object_class_install_property (gobject_class, PROP_SSRC,
159 g_param_spec_uint ("ssrc", "SSRC",
160 "The SSRC of the packets (default == random)",
161 0, G_MAXUINT, DEFAULT_SSRC,
162 GST_PARAM_MUTABLE_PLAYING | G_PARAM_READWRITE |
163 G_PARAM_STATIC_STRINGS));
165 gstelement_class->request_new_pad =
166 GST_DEBUG_FUNCPTR (gst_rtp_mux_request_new_pad);
167 gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_rtp_mux_release_pad);
168 gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_rtp_mux_change_state);
172 gst_rtp_mux_dispose (GObject * object)
174 GstRTPMux *rtp_mux = GST_RTP_MUX (object);
177 g_clear_object (&rtp_mux->last_pad);
180 for (item = GST_ELEMENT_PADS (object); item; item = g_list_next (item)) {
181 GstPad *pad = GST_PAD (item->data);
182 if (GST_PAD_IS_SINK (pad)) {
183 gst_element_release_request_pad (GST_ELEMENT (object), pad);
188 G_OBJECT_CLASS (gst_rtp_mux_parent_class)->dispose (object);
192 gst_rtp_mux_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
194 GstRTPMux *rtp_mux = GST_RTP_MUX (parent);
195 GstRTPMuxClass *klass;
198 klass = GST_RTP_MUX_GET_CLASS (rtp_mux);
200 ret = klass->src_event (rtp_mux, event);
206 gst_rtp_mux_src_event_real (GstRTPMux * rtp_mux, GstEvent * event)
208 switch (GST_EVENT_TYPE (event)) {
209 case GST_EVENT_CUSTOM_UPSTREAM:
211 const GstStructure *s = gst_event_get_structure (event);
213 if (gst_structure_has_name (s, "GstRTPCollision")) {
216 if (!gst_structure_get_uint (s, "ssrc", &ssrc))
219 GST_DEBUG_OBJECT (rtp_mux, "collided ssrc: %" G_GUINT32_FORMAT, ssrc);
221 /* choose another ssrc for our stream */
222 GST_OBJECT_LOCK (rtp_mux);
223 if (ssrc == rtp_mux->current_ssrc) {
225 guint suggested_ssrc = 0;
228 if (gst_structure_get_uint (s, "suggested-ssrc", &suggested_ssrc))
229 rtp_mux->current_ssrc = suggested_ssrc;
231 while (ssrc == rtp_mux->current_ssrc)
232 rtp_mux->current_ssrc = g_random_int ();
234 new_ssrc = rtp_mux->current_ssrc;
235 GST_OBJECT_UNLOCK (rtp_mux);
237 caps = gst_pad_get_current_caps (rtp_mux->srcpad);
238 caps = gst_caps_make_writable (caps);
239 gst_caps_set_simple (caps, "ssrc", G_TYPE_UINT, new_ssrc, NULL);
240 gst_pad_set_caps (rtp_mux->srcpad, caps);
241 gst_caps_unref (caps);
243 GST_OBJECT_UNLOCK (rtp_mux);
253 return gst_pad_event_default (rtp_mux->srcpad, GST_OBJECT (rtp_mux), event);
257 gst_rtp_mux_init (GstRTPMux * rtp_mux)
259 GstElementClass *klass = GST_ELEMENT_GET_CLASS (rtp_mux);
262 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
264 gst_pad_set_event_function (rtp_mux->srcpad,
265 GST_DEBUG_FUNCPTR (gst_rtp_mux_src_event));
266 gst_pad_use_fixed_caps (rtp_mux->srcpad);
267 gst_element_add_pad (GST_ELEMENT (rtp_mux), rtp_mux->srcpad);
269 rtp_mux->ssrc = DEFAULT_SSRC;
270 rtp_mux->current_ssrc = DEFAULT_SSRC;
271 rtp_mux->ssrc_random = TRUE;
272 rtp_mux->ts_offset = DEFAULT_TIMESTAMP_OFFSET;
273 rtp_mux->seqnum_offset = DEFAULT_SEQNUM_OFFSET;
275 rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
279 gst_rtp_mux_setup_sinkpad (GstRTPMux * rtp_mux, GstPad * sinkpad)
281 GstRTPMuxPadPrivate *padpriv = g_slice_new0 (GstRTPMuxPadPrivate);
283 /* setup some pad functions */
284 gst_pad_set_chain_function (sinkpad, GST_DEBUG_FUNCPTR (gst_rtp_mux_chain));
285 gst_pad_set_chain_list_function (sinkpad,
286 GST_DEBUG_FUNCPTR (gst_rtp_mux_chain_list));
287 gst_pad_set_event_function (sinkpad,
288 GST_DEBUG_FUNCPTR (gst_rtp_mux_sink_event));
289 gst_pad_set_query_function (sinkpad,
290 GST_DEBUG_FUNCPTR (gst_rtp_mux_sink_query));
293 gst_segment_init (&padpriv->segment, GST_FORMAT_UNDEFINED);
295 gst_pad_set_element_private (sinkpad, padpriv);
297 gst_pad_set_active (sinkpad, TRUE);
298 gst_element_add_pad (GST_ELEMENT (rtp_mux), sinkpad);
302 gst_rtp_mux_request_new_pad (GstElement * element,
303 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
308 g_return_val_if_fail (templ != NULL, NULL);
309 g_return_val_if_fail (GST_IS_RTP_MUX (element), NULL);
311 rtp_mux = GST_RTP_MUX (element);
313 if (templ->direction != GST_PAD_SINK) {
314 GST_WARNING_OBJECT (rtp_mux, "request pad that is not a SINK pad");
318 newpad = gst_pad_new_from_template (templ, req_name);
320 gst_rtp_mux_setup_sinkpad (rtp_mux, newpad);
322 GST_WARNING_OBJECT (rtp_mux, "failed to create request pad");
328 gst_rtp_mux_release_pad (GstElement * element, GstPad * pad)
330 GstRTPMuxPadPrivate *padpriv;
332 GST_OBJECT_LOCK (element);
333 padpriv = gst_pad_get_element_private (pad);
334 gst_pad_set_element_private (pad, NULL);
335 GST_OBJECT_UNLOCK (element);
337 gst_element_remove_pad (element, pad);
340 g_slice_free (GstRTPMuxPadPrivate, padpriv);
344 /* Put our own timestamp-offset on the buffer */
346 gst_rtp_mux_readjust_rtp_timestamp_locked (GstRTPMux * rtp_mux,
347 GstRTPMuxPadPrivate * padpriv, GstRTPBuffer * rtpbuffer)
350 guint32 sink_ts_base = 0;
352 if (padpriv && padpriv->have_timestamp_offset)
353 sink_ts_base = padpriv->timestamp_offset;
355 ts = gst_rtp_buffer_get_timestamp (rtpbuffer) - sink_ts_base +
357 GST_LOG_OBJECT (rtp_mux,
358 "Re-adjusting RTP ts %u to %u (sink_ts_base = %u, rtp_mux->ts_base=%u)",
359 gst_rtp_buffer_get_timestamp (rtpbuffer),
360 ts, sink_ts_base, rtp_mux->ts_base);
361 gst_rtp_buffer_set_timestamp (rtpbuffer, ts);
365 process_buffer_locked (GstRTPMux * rtp_mux, GstRTPMuxPadPrivate * padpriv,
366 GstRTPBuffer * rtpbuffer)
368 GstRTPMuxClass *klass = GST_RTP_MUX_GET_CLASS (rtp_mux);
370 if (klass->accept_buffer_locked)
371 if (!klass->accept_buffer_locked (rtp_mux, padpriv, rtpbuffer))
375 gst_rtp_buffer_set_seq (rtpbuffer, rtp_mux->seqnum);
377 gst_rtp_buffer_set_ssrc (rtpbuffer, rtp_mux->current_ssrc);
378 gst_rtp_mux_readjust_rtp_timestamp_locked (rtp_mux, padpriv, rtpbuffer);
379 GST_LOG_OBJECT (rtp_mux,
380 "Pushing packet size %" G_GSIZE_FORMAT ", seq=%d, ts=%u",
381 rtpbuffer->map[0].size, rtp_mux->seqnum,
382 gst_rtp_buffer_get_timestamp (rtpbuffer));
385 if (padpriv->segment.format == GST_FORMAT_TIME)
386 GST_BUFFER_PTS (rtpbuffer->buffer) =
387 gst_segment_to_running_time (&padpriv->segment, GST_FORMAT_TIME,
388 GST_BUFFER_PTS (rtpbuffer->buffer));
394 struct BufferListData
397 GstRTPMuxPadPrivate *padpriv;
402 process_list_item (GstBuffer ** buffer, guint idx, gpointer user_data)
404 struct BufferListData *bd = user_data;
405 GstRTPBuffer rtpbuffer = GST_RTP_BUFFER_INIT;
407 *buffer = gst_buffer_make_writable (*buffer);
409 gst_rtp_buffer_map (*buffer, GST_MAP_READWRITE, &rtpbuffer);
411 bd->drop = !process_buffer_locked (bd->rtp_mux, bd->padpriv, &rtpbuffer);
413 gst_rtp_buffer_unmap (&rtpbuffer);
418 if (GST_BUFFER_DURATION_IS_VALID (*buffer) &&
419 GST_BUFFER_PTS_IS_VALID (*buffer))
420 bd->rtp_mux->last_stop = GST_BUFFER_PTS (*buffer) +
421 GST_BUFFER_DURATION (*buffer);
423 bd->rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
428 static gboolean resend_events (GstPad * pad, GstEvent ** event,
432 gst_rtp_mux_chain_list (GstPad * pad, GstObject * parent,
433 GstBufferList * bufferlist)
437 GstRTPMuxPadPrivate *padpriv;
438 gboolean changed = FALSE;
439 struct BufferListData bd;
441 rtp_mux = GST_RTP_MUX (parent);
443 if (gst_pad_check_reconfigure (rtp_mux->srcpad)) {
444 GstCaps *current_caps = gst_pad_get_current_caps (pad);
446 if (!gst_rtp_mux_setcaps (pad, rtp_mux, current_caps)) {
447 ret = GST_FLOW_NOT_NEGOTIATED;
448 gst_buffer_list_unref (bufferlist);
451 gst_caps_unref (current_caps);
454 GST_OBJECT_LOCK (rtp_mux);
456 padpriv = gst_pad_get_element_private (pad);
458 GST_OBJECT_UNLOCK (rtp_mux);
459 ret = GST_FLOW_NOT_LINKED;
460 gst_buffer_list_unref (bufferlist);
464 bd.rtp_mux = rtp_mux;
465 bd.padpriv = padpriv;
468 bufferlist = gst_buffer_list_make_writable (bufferlist);
469 gst_buffer_list_foreach (bufferlist, process_list_item, &bd);
471 if (!bd.drop && pad != rtp_mux->last_pad) {
473 g_clear_object (&rtp_mux->last_pad);
474 rtp_mux->last_pad = g_object_ref (pad);
477 GST_OBJECT_UNLOCK (rtp_mux);
480 gst_pad_sticky_events_foreach (pad, resend_events, rtp_mux);
483 gst_buffer_list_unref (bufferlist);
486 ret = gst_pad_push_list (rtp_mux->srcpad, bufferlist);
495 resend_events (GstPad * pad, GstEvent ** event, gpointer user_data)
497 GstRTPMux *rtp_mux = user_data;
499 if (GST_EVENT_TYPE (*event) == GST_EVENT_CAPS) {
502 gst_event_parse_caps (*event, &caps);
503 gst_rtp_mux_setcaps (pad, rtp_mux, caps);
505 gst_pad_push_event (rtp_mux->srcpad, gst_event_ref (*event));
512 gst_rtp_mux_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
516 GstRTPMuxPadPrivate *padpriv;
518 gboolean changed = FALSE;
519 GstRTPBuffer rtpbuffer = GST_RTP_BUFFER_INIT;
521 rtp_mux = GST_RTP_MUX (parent);
523 if (gst_pad_check_reconfigure (rtp_mux->srcpad)) {
524 GstCaps *current_caps = gst_pad_get_current_caps (pad);
526 if (!gst_rtp_mux_setcaps (pad, rtp_mux, current_caps)) {
527 ret = GST_FLOW_NOT_NEGOTIATED;
528 gst_buffer_unref (buffer);
531 gst_caps_unref (current_caps);
534 GST_OBJECT_LOCK (rtp_mux);
535 padpriv = gst_pad_get_element_private (pad);
538 GST_OBJECT_UNLOCK (rtp_mux);
539 gst_buffer_unref (buffer);
540 return GST_FLOW_NOT_LINKED;
543 buffer = gst_buffer_make_writable (buffer);
545 if (!gst_rtp_buffer_map (buffer, GST_MAP_READWRITE, &rtpbuffer)) {
546 GST_OBJECT_UNLOCK (rtp_mux);
547 gst_buffer_unref (buffer);
548 GST_ERROR_OBJECT (rtp_mux, "Invalid RTP buffer");
549 return GST_FLOW_ERROR;
552 drop = !process_buffer_locked (rtp_mux, padpriv, &rtpbuffer);
554 gst_rtp_buffer_unmap (&rtpbuffer);
557 if (pad != rtp_mux->last_pad) {
559 g_clear_object (&rtp_mux->last_pad);
560 rtp_mux->last_pad = g_object_ref (pad);
563 if (GST_BUFFER_DURATION_IS_VALID (buffer) &&
564 GST_BUFFER_PTS_IS_VALID (buffer))
565 rtp_mux->last_stop = GST_BUFFER_PTS (buffer) +
566 GST_BUFFER_DURATION (buffer);
568 rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
571 GST_OBJECT_UNLOCK (rtp_mux);
574 gst_pad_sticky_events_foreach (pad, resend_events, rtp_mux);
577 gst_buffer_unref (buffer);
580 ret = gst_pad_push (rtp_mux->srcpad, buffer);
588 gst_rtp_mux_setcaps (GstPad * pad, GstRTPMux * rtp_mux, GstCaps * caps)
590 GstStructure *structure;
591 gboolean ret = FALSE;
592 GstRTPMuxPadPrivate *padpriv;
595 if (!gst_caps_is_fixed (caps))
598 peercaps = gst_pad_peer_query_caps (rtp_mux->srcpad, NULL);
600 GstCaps *tcaps, *othercaps;;
601 tcaps = gst_pad_get_pad_template_caps (pad);
602 othercaps = gst_caps_intersect_full (peercaps, tcaps,
603 GST_CAPS_INTERSECT_FIRST);
605 if (gst_caps_get_size (othercaps) > 0) {
606 structure = gst_caps_get_structure (othercaps, 0);
607 GST_OBJECT_LOCK (rtp_mux);
608 if (gst_structure_get_uint (structure, "ssrc", &rtp_mux->current_ssrc)) {
609 GST_DEBUG_OBJECT (pad, "Use downstream ssrc: %x",
610 rtp_mux->current_ssrc);
611 rtp_mux->have_ssrc = TRUE;
613 GST_OBJECT_UNLOCK (rtp_mux);
616 gst_caps_unref (othercaps);
618 gst_caps_unref (peercaps);
619 gst_caps_unref (tcaps);
622 structure = gst_caps_get_structure (caps, 0);
627 GST_OBJECT_LOCK (rtp_mux);
628 padpriv = gst_pad_get_element_private (pad);
630 gst_structure_get_uint (structure, "timestamp-offset",
631 &padpriv->timestamp_offset)) {
632 padpriv->have_timestamp_offset = TRUE;
635 caps = gst_caps_copy (caps);
637 /* if we don't have a specified ssrc, first try to take one from the caps,
638 and if that fails, generate one */
639 if (!rtp_mux->have_ssrc) {
640 if (rtp_mux->ssrc_random) {
641 if (!gst_structure_get_uint (structure, "ssrc", &rtp_mux->current_ssrc))
642 rtp_mux->current_ssrc = g_random_int ();
643 rtp_mux->have_ssrc = TRUE;
647 gst_caps_set_simple (caps,
648 "timestamp-offset", G_TYPE_UINT, rtp_mux->ts_base,
649 "seqnum-offset", G_TYPE_UINT, rtp_mux->seqnum_base,
650 "ssrc", G_TYPE_UINT, rtp_mux->current_ssrc, NULL);
652 GST_OBJECT_UNLOCK (rtp_mux);
654 if (rtp_mux->send_stream_start) {
657 /* stream-start (FIXME: create id based on input ids) */
658 g_snprintf (s_id, sizeof (s_id), "interleave-%08x", g_random_int ());
659 gst_pad_push_event (rtp_mux->srcpad, gst_event_new_stream_start (s_id));
661 rtp_mux->send_stream_start = FALSE;
664 GST_DEBUG_OBJECT (rtp_mux,
665 "setting caps %" GST_PTR_FORMAT " on src pad..", caps);
666 ret = gst_pad_set_caps (rtp_mux->srcpad, caps);
669 gst_caps_unref (caps);
675 clear_caps (GstCaps * caps, gboolean only_clock_rate)
679 /* Lets only match on the clock-rate */
680 for (i = 0; i < gst_caps_get_size (caps); i++) {
681 GstStructure *s = gst_caps_get_structure (caps, i);
683 for (j = 0; j < gst_structure_n_fields (s); j++) {
684 const gchar *name = gst_structure_nth_field_name (s, j);
686 if (strcmp (name, "clock-rate") && (only_clock_rate ||
687 (strcmp (name, "ssrc")))) {
688 gst_structure_remove_field (s, name);
696 same_clock_rate_fold (const GValue * item, GValue * ret, gpointer user_data)
698 GstPad *mypad = user_data;
699 GstPad *pad = g_value_get_object (item);
706 accumcaps = g_value_get_boxed (ret);
707 peercaps = gst_pad_peer_query_caps (pad, accumcaps);
709 g_warning ("no peercaps");
712 peercaps = gst_caps_make_writable (peercaps);
713 clear_caps (peercaps, TRUE);
715 g_value_take_boxed (ret, peercaps);
717 return !gst_caps_is_empty (peercaps);
721 gst_rtp_mux_getcaps (GstPad * pad, GstRTPMux * mux, GstCaps * filter)
723 GstCaps *caps = NULL;
724 GstIterator *iter = NULL;
726 GstIteratorResult res;
731 peercaps = gst_pad_peer_query_caps (mux->srcpad, NULL);
734 tcaps = gst_pad_get_pad_template_caps (pad);
735 othercaps = gst_caps_intersect_full (peercaps, tcaps,
736 GST_CAPS_INTERSECT_FIRST);
737 gst_caps_unref (peercaps);
739 tcaps = gst_pad_get_pad_template_caps (mux->srcpad);
741 othercaps = gst_caps_intersect_full (filter, tcaps,
742 GST_CAPS_INTERSECT_FIRST);
744 othercaps = gst_caps_copy (tcaps);
746 gst_caps_unref (tcaps);
748 GST_LOG_OBJECT (pad, "Intersected srcpad-peercaps and template caps: %"
749 GST_PTR_FORMAT, othercaps);
751 clear_caps (othercaps, TRUE);
753 g_value_init (&v, GST_TYPE_CAPS);
755 iter = gst_element_iterate_sink_pads (GST_ELEMENT (mux));
757 gst_value_set_caps (&v, othercaps);
758 res = gst_iterator_fold (iter, same_clock_rate_fold, &v, pad);
759 gst_iterator_resync (iter);
760 } while (res == GST_ITERATOR_RESYNC);
761 gst_iterator_free (iter);
763 caps = gst_caps_intersect ((GstCaps *) gst_value_get_caps (&v), othercaps);
766 gst_caps_unref (othercaps);
768 if (res == GST_ITERATOR_ERROR) {
769 gst_caps_unref (caps);
770 caps = gst_caps_new_empty ();
778 gst_rtp_mux_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
780 GstRTPMux *mux = GST_RTP_MUX (parent);
781 gboolean res = FALSE;
783 switch (GST_QUERY_TYPE (query)) {
786 GstCaps *filter, *caps;
788 gst_query_parse_caps (query, &filter);
789 GST_LOG_OBJECT (pad, "Received caps-query with filter-caps: %"
790 GST_PTR_FORMAT, filter);
791 caps = gst_rtp_mux_getcaps (pad, mux, filter);
792 gst_query_set_caps_result (query, caps);
793 GST_LOG_OBJECT (mux, "Answering caps-query with caps: %"
794 GST_PTR_FORMAT, caps);
795 gst_caps_unref (caps);
800 res = gst_pad_query_default (pad, parent, query);
808 gst_rtp_mux_get_property (GObject * object,
809 guint prop_id, GValue * value, GParamSpec * pspec)
813 rtp_mux = GST_RTP_MUX (object);
815 GST_OBJECT_LOCK (rtp_mux);
817 case PROP_TIMESTAMP_OFFSET:
818 g_value_set_int64 (value, rtp_mux->ts_offset);
820 case PROP_SEQNUM_OFFSET:
821 g_value_set_int (value, rtp_mux->seqnum_offset);
824 g_value_set_uint (value, rtp_mux->seqnum);
827 g_value_set_uint (value, rtp_mux->ssrc);
830 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
833 GST_OBJECT_UNLOCK (rtp_mux);
837 gst_rtp_mux_set_property (GObject * object,
838 guint prop_id, const GValue * value, GParamSpec * pspec)
842 rtp_mux = GST_RTP_MUX (object);
845 case PROP_TIMESTAMP_OFFSET:
846 rtp_mux->ts_offset = g_value_get_int64 (value);
848 case PROP_SEQNUM_OFFSET:
849 rtp_mux->seqnum_offset = g_value_get_int (value);
852 GST_OBJECT_LOCK (rtp_mux);
853 rtp_mux->ssrc = g_value_get_uint (value);
854 rtp_mux->current_ssrc = rtp_mux->ssrc;
855 rtp_mux->have_ssrc = TRUE;
856 rtp_mux->ssrc_random = FALSE;
857 GST_OBJECT_UNLOCK (rtp_mux);
860 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
866 gst_rtp_mux_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
868 GstRTPMux *mux = GST_RTP_MUX (parent);
872 switch (GST_EVENT_TYPE (event)) {
877 gst_event_parse_caps (event, &caps);
878 GST_LOG_OBJECT (pad, "Received caps-event with caps: %"
879 GST_PTR_FORMAT, caps);
880 ret = gst_rtp_mux_setcaps (pad, mux, caps);
881 gst_event_unref (event);
884 case GST_EVENT_FLUSH_STOP:
886 GST_OBJECT_LOCK (mux);
887 mux->last_stop = GST_CLOCK_TIME_NONE;
888 GST_OBJECT_UNLOCK (mux);
891 case GST_EVENT_SEGMENT:
893 GstRTPMuxPadPrivate *padpriv;
895 GST_OBJECT_LOCK (mux);
896 padpriv = gst_pad_get_element_private (pad);
899 gst_event_copy_segment (event, &padpriv->segment);
901 GST_OBJECT_UNLOCK (mux);
908 GST_OBJECT_LOCK (mux);
909 is_pad = (pad == mux->last_pad);
910 GST_OBJECT_UNLOCK (mux);
913 return gst_pad_push_event (mux->srcpad, event);
915 gst_event_unref (event);
921 gst_rtp_mux_ready_to_paused (GstRTPMux * rtp_mux)
924 GST_OBJECT_LOCK (rtp_mux);
926 g_clear_object (&rtp_mux->last_pad);
927 rtp_mux->send_stream_start = TRUE;
929 if (rtp_mux->seqnum_offset == -1)
930 rtp_mux->seqnum_base = g_random_int_range (0, G_MAXUINT16);
932 rtp_mux->seqnum_base = rtp_mux->seqnum_offset;
933 rtp_mux->seqnum = rtp_mux->seqnum_base;
935 if (rtp_mux->ts_offset == -1)
936 rtp_mux->ts_base = g_random_int ();
938 rtp_mux->ts_base = rtp_mux->ts_offset;
940 rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
942 if (rtp_mux->ssrc_random) {
943 rtp_mux->have_ssrc = FALSE;
945 rtp_mux->current_ssrc = rtp_mux->ssrc;
946 rtp_mux->have_ssrc = TRUE;
949 GST_DEBUG_OBJECT (rtp_mux, "set timestamp-offset to %u", rtp_mux->ts_base);
951 GST_OBJECT_UNLOCK (rtp_mux);
954 static GstStateChangeReturn
955 gst_rtp_mux_change_state (GstElement * element, GstStateChange transition)
958 GstStateChangeReturn ret;
960 rtp_mux = GST_RTP_MUX (element);
962 switch (transition) {
963 case GST_STATE_CHANGE_READY_TO_PAUSED:
964 gst_rtp_mux_ready_to_paused (rtp_mux);
970 ret = GST_ELEMENT_CLASS (gst_rtp_mux_parent_class)->change_state (element,
973 switch (transition) {
974 case GST_STATE_CHANGE_PAUSED_TO_READY:
975 g_clear_object (&rtp_mux->last_pad);
985 gst_rtp_mux_plugin_init (GstPlugin * plugin)
987 GST_DEBUG_CATEGORY_INIT (gst_rtp_mux_debug, "rtpmux", 0, "rtp muxer");
989 return gst_element_register (plugin, "rtpmux", GST_RANK_NONE,