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->ts_offset = DEFAULT_TIMESTAMP_OFFSET;
269 rtp_mux->seqnum_offset = DEFAULT_SEQNUM_OFFSET;
271 rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
275 gst_rtp_mux_setup_sinkpad (GstRTPMux * rtp_mux, GstPad * sinkpad)
277 GstRTPMuxPadPrivate *padpriv = g_slice_new0 (GstRTPMuxPadPrivate);
279 /* setup some pad functions */
280 gst_pad_set_chain_function (sinkpad, GST_DEBUG_FUNCPTR (gst_rtp_mux_chain));
281 gst_pad_set_chain_list_function (sinkpad,
282 GST_DEBUG_FUNCPTR (gst_rtp_mux_chain_list));
283 gst_pad_set_event_function (sinkpad,
284 GST_DEBUG_FUNCPTR (gst_rtp_mux_sink_event));
285 gst_pad_set_query_function (sinkpad,
286 GST_DEBUG_FUNCPTR (gst_rtp_mux_sink_query));
289 gst_segment_init (&padpriv->segment, GST_FORMAT_UNDEFINED);
291 gst_pad_set_element_private (sinkpad, padpriv);
293 gst_pad_set_active (sinkpad, TRUE);
294 gst_element_add_pad (GST_ELEMENT (rtp_mux), sinkpad);
298 gst_rtp_mux_request_new_pad (GstElement * element,
299 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
304 g_return_val_if_fail (templ != NULL, NULL);
305 g_return_val_if_fail (GST_IS_RTP_MUX (element), NULL);
307 rtp_mux = GST_RTP_MUX (element);
309 if (templ->direction != GST_PAD_SINK) {
310 GST_WARNING_OBJECT (rtp_mux, "request pad that is not a SINK pad");
314 newpad = gst_pad_new_from_template (templ, req_name);
316 gst_rtp_mux_setup_sinkpad (rtp_mux, newpad);
318 GST_WARNING_OBJECT (rtp_mux, "failed to create request pad");
324 gst_rtp_mux_release_pad (GstElement * element, GstPad * pad)
326 GstRTPMuxPadPrivate *padpriv;
328 GST_OBJECT_LOCK (element);
329 padpriv = gst_pad_get_element_private (pad);
330 gst_pad_set_element_private (pad, NULL);
331 GST_OBJECT_UNLOCK (element);
333 gst_element_remove_pad (element, pad);
336 g_slice_free (GstRTPMuxPadPrivate, padpriv);
340 /* Put our own timestamp-offset on the buffer */
342 gst_rtp_mux_readjust_rtp_timestamp_locked (GstRTPMux * rtp_mux,
343 GstRTPMuxPadPrivate * padpriv, GstRTPBuffer * rtpbuffer)
346 guint32 sink_ts_base = 0;
348 if (padpriv && padpriv->have_timestamp_offset)
349 sink_ts_base = padpriv->timestamp_offset;
351 ts = gst_rtp_buffer_get_timestamp (rtpbuffer) - sink_ts_base +
353 GST_LOG_OBJECT (rtp_mux, "Re-adjusting RTP ts %u to %u",
354 gst_rtp_buffer_get_timestamp (rtpbuffer), ts);
355 gst_rtp_buffer_set_timestamp (rtpbuffer, ts);
359 process_buffer_locked (GstRTPMux * rtp_mux, GstRTPMuxPadPrivate * padpriv,
360 GstRTPBuffer * rtpbuffer)
362 GstRTPMuxClass *klass = GST_RTP_MUX_GET_CLASS (rtp_mux);
364 if (klass->accept_buffer_locked)
365 if (!klass->accept_buffer_locked (rtp_mux, padpriv, rtpbuffer))
369 gst_rtp_buffer_set_seq (rtpbuffer, rtp_mux->seqnum);
371 gst_rtp_buffer_set_ssrc (rtpbuffer, rtp_mux->current_ssrc);
372 gst_rtp_mux_readjust_rtp_timestamp_locked (rtp_mux, padpriv, rtpbuffer);
373 GST_LOG_OBJECT (rtp_mux,
374 "Pushing packet size %" G_GSIZE_FORMAT ", seq=%d, ts=%u",
375 rtpbuffer->map[0].size, rtp_mux->seqnum,
376 gst_rtp_buffer_get_timestamp (rtpbuffer));
379 if (padpriv->segment.format == GST_FORMAT_TIME) {
380 GST_BUFFER_PTS (rtpbuffer->buffer) =
381 gst_segment_to_running_time (&padpriv->segment, GST_FORMAT_TIME,
382 GST_BUFFER_PTS (rtpbuffer->buffer));
383 GST_BUFFER_DTS (rtpbuffer->buffer) =
384 gst_segment_to_running_time (&padpriv->segment, GST_FORMAT_TIME,
385 GST_BUFFER_DTS (rtpbuffer->buffer));
392 struct BufferListData
395 GstRTPMuxPadPrivate *padpriv;
400 process_list_item (GstBuffer ** buffer, guint idx, gpointer user_data)
402 struct BufferListData *bd = user_data;
403 GstRTPBuffer rtpbuffer = GST_RTP_BUFFER_INIT;
405 *buffer = gst_buffer_make_writable (*buffer);
407 gst_rtp_buffer_map (*buffer, GST_MAP_READWRITE, &rtpbuffer);
409 bd->drop = !process_buffer_locked (bd->rtp_mux, bd->padpriv, &rtpbuffer);
411 gst_rtp_buffer_unmap (&rtpbuffer);
416 if (GST_BUFFER_DURATION_IS_VALID (*buffer) &&
417 GST_BUFFER_PTS_IS_VALID (*buffer))
418 bd->rtp_mux->last_stop = GST_BUFFER_PTS (*buffer) +
419 GST_BUFFER_DURATION (*buffer);
421 bd->rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
426 static gboolean resend_events (GstPad * pad, GstEvent ** event,
430 gst_rtp_mux_chain_list (GstPad * pad, GstObject * parent,
431 GstBufferList * bufferlist)
435 GstRTPMuxPadPrivate *padpriv;
436 gboolean changed = FALSE;
437 struct BufferListData bd;
439 rtp_mux = GST_RTP_MUX (parent);
441 if (gst_pad_check_reconfigure (rtp_mux->srcpad)) {
442 GstCaps *current_caps = gst_pad_get_current_caps (pad);
444 if (!gst_rtp_mux_setcaps (pad, rtp_mux, current_caps)) {
445 gst_pad_mark_reconfigure (rtp_mux->srcpad);
446 if (GST_PAD_IS_FLUSHING (rtp_mux->srcpad))
447 ret = GST_FLOW_FLUSHING;
449 ret = GST_FLOW_NOT_NEGOTIATED;
450 gst_buffer_list_unref (bufferlist);
453 gst_caps_unref (current_caps);
456 GST_OBJECT_LOCK (rtp_mux);
458 padpriv = gst_pad_get_element_private (pad);
460 GST_OBJECT_UNLOCK (rtp_mux);
461 ret = GST_FLOW_NOT_LINKED;
462 gst_buffer_list_unref (bufferlist);
466 bd.rtp_mux = rtp_mux;
467 bd.padpriv = padpriv;
470 bufferlist = gst_buffer_list_make_writable (bufferlist);
471 gst_buffer_list_foreach (bufferlist, process_list_item, &bd);
473 if (!bd.drop && pad != rtp_mux->last_pad) {
475 g_clear_object (&rtp_mux->last_pad);
476 rtp_mux->last_pad = g_object_ref (pad);
479 GST_OBJECT_UNLOCK (rtp_mux);
482 gst_pad_sticky_events_foreach (pad, resend_events, rtp_mux);
485 gst_buffer_list_unref (bufferlist);
488 ret = gst_pad_push_list (rtp_mux->srcpad, bufferlist);
497 resend_events (GstPad * pad, GstEvent ** event, gpointer user_data)
499 GstRTPMux *rtp_mux = user_data;
501 if (GST_EVENT_TYPE (*event) == GST_EVENT_CAPS) {
504 gst_event_parse_caps (*event, &caps);
505 gst_rtp_mux_setcaps (pad, rtp_mux, caps);
506 } else if (GST_EVENT_TYPE (*event) == GST_EVENT_SEGMENT) {
507 GstSegment new_segment;
508 gst_segment_init (&new_segment, GST_FORMAT_TIME);
509 gst_pad_push_event (rtp_mux->srcpad, gst_event_new_segment (&new_segment));
511 gst_pad_push_event (rtp_mux->srcpad, gst_event_ref (*event));
518 gst_rtp_mux_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
522 GstRTPMuxPadPrivate *padpriv;
524 gboolean changed = FALSE;
525 GstRTPBuffer rtpbuffer = GST_RTP_BUFFER_INIT;
527 rtp_mux = GST_RTP_MUX (parent);
529 if (gst_pad_check_reconfigure (rtp_mux->srcpad)) {
530 GstCaps *current_caps = gst_pad_get_current_caps (pad);
532 if (!gst_rtp_mux_setcaps (pad, rtp_mux, current_caps)) {
533 gst_pad_mark_reconfigure (rtp_mux->srcpad);
534 if (GST_PAD_IS_FLUSHING (rtp_mux->srcpad))
535 ret = GST_FLOW_FLUSHING;
537 ret = GST_FLOW_NOT_NEGOTIATED;
538 gst_buffer_unref (buffer);
541 gst_caps_unref (current_caps);
544 GST_OBJECT_LOCK (rtp_mux);
545 padpriv = gst_pad_get_element_private (pad);
548 GST_OBJECT_UNLOCK (rtp_mux);
549 gst_buffer_unref (buffer);
550 return GST_FLOW_NOT_LINKED;
553 buffer = gst_buffer_make_writable (buffer);
555 if (!gst_rtp_buffer_map (buffer, GST_MAP_READWRITE, &rtpbuffer)) {
556 GST_OBJECT_UNLOCK (rtp_mux);
557 gst_buffer_unref (buffer);
558 GST_ERROR_OBJECT (rtp_mux, "Invalid RTP buffer");
559 return GST_FLOW_ERROR;
562 drop = !process_buffer_locked (rtp_mux, padpriv, &rtpbuffer);
564 gst_rtp_buffer_unmap (&rtpbuffer);
567 if (pad != rtp_mux->last_pad) {
569 g_clear_object (&rtp_mux->last_pad);
570 rtp_mux->last_pad = g_object_ref (pad);
573 if (GST_BUFFER_DURATION_IS_VALID (buffer) &&
574 GST_BUFFER_PTS_IS_VALID (buffer))
575 rtp_mux->last_stop = GST_BUFFER_PTS (buffer) +
576 GST_BUFFER_DURATION (buffer);
578 rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
581 GST_OBJECT_UNLOCK (rtp_mux);
584 gst_pad_sticky_events_foreach (pad, resend_events, rtp_mux);
587 gst_buffer_unref (buffer);
590 ret = gst_pad_push (rtp_mux->srcpad, buffer);
598 gst_rtp_mux_setcaps (GstPad * pad, GstRTPMux * rtp_mux, GstCaps * caps)
600 GstStructure *structure;
601 gboolean ret = FALSE;
602 GstRTPMuxPadPrivate *padpriv;
605 if (!gst_caps_is_fixed (caps))
608 peercaps = gst_pad_peer_query_caps (rtp_mux->srcpad, NULL);
610 GstCaps *tcaps, *othercaps;;
611 tcaps = gst_pad_get_pad_template_caps (pad);
612 othercaps = gst_caps_intersect_full (peercaps, tcaps,
613 GST_CAPS_INTERSECT_FIRST);
615 if (gst_caps_get_size (othercaps) > 0) {
616 structure = gst_caps_get_structure (othercaps, 0);
617 GST_OBJECT_LOCK (rtp_mux);
618 if (gst_structure_get_uint (structure, "ssrc", &rtp_mux->current_ssrc)) {
619 GST_DEBUG_OBJECT (pad, "Use downstream ssrc: %x",
620 rtp_mux->current_ssrc);
621 rtp_mux->have_ssrc = TRUE;
623 GST_OBJECT_UNLOCK (rtp_mux);
626 gst_caps_unref (othercaps);
628 gst_caps_unref (peercaps);
629 gst_caps_unref (tcaps);
632 structure = gst_caps_get_structure (caps, 0);
637 GST_OBJECT_LOCK (rtp_mux);
638 padpriv = gst_pad_get_element_private (pad);
640 gst_structure_get_uint (structure, "timestamp-offset",
641 &padpriv->timestamp_offset)) {
642 padpriv->have_timestamp_offset = TRUE;
645 caps = gst_caps_copy (caps);
647 /* if we don't have a specified ssrc, first try to take one from the caps,
648 and if that fails, generate one */
649 if (rtp_mux->ssrc == DEFAULT_SSRC) {
650 if (rtp_mux->current_ssrc == DEFAULT_SSRC) {
651 if (!gst_structure_get_uint (structure, "ssrc", &rtp_mux->current_ssrc))
652 rtp_mux->current_ssrc = g_random_int ();
655 rtp_mux->current_ssrc = rtp_mux->ssrc;
658 gst_caps_set_simple (caps,
659 "timestamp-offset", G_TYPE_UINT, rtp_mux->ts_base,
660 "seqnum-offset", G_TYPE_UINT, rtp_mux->seqnum_base,
661 "ssrc", G_TYPE_UINT, rtp_mux->current_ssrc, NULL);
663 GST_OBJECT_UNLOCK (rtp_mux);
665 if (rtp_mux->send_stream_start) {
668 /* stream-start (FIXME: create id based on input ids) */
669 g_snprintf (s_id, sizeof (s_id), "interleave-%08x", g_random_int ());
670 gst_pad_push_event (rtp_mux->srcpad, gst_event_new_stream_start (s_id));
672 rtp_mux->send_stream_start = FALSE;
675 GST_DEBUG_OBJECT (rtp_mux,
676 "setting caps %" GST_PTR_FORMAT " on src pad..", caps);
677 ret = gst_pad_set_caps (rtp_mux->srcpad, caps);
680 gst_caps_unref (caps);
686 clear_caps (GstCaps * caps, gboolean only_clock_rate)
690 /* Lets only match on the clock-rate */
691 for (i = 0; i < gst_caps_get_size (caps); i++) {
692 GstStructure *s = gst_caps_get_structure (caps, i);
694 for (j = 0; j < gst_structure_n_fields (s); j++) {
695 const gchar *name = gst_structure_nth_field_name (s, j);
697 if (strcmp (name, "clock-rate") && (only_clock_rate ||
698 (strcmp (name, "ssrc")))) {
699 gst_structure_remove_field (s, name);
707 same_clock_rate_fold (const GValue * item, GValue * ret, gpointer user_data)
709 GstPad *mypad = user_data;
710 GstPad *pad = g_value_get_object (item);
717 accumcaps = g_value_get_boxed (ret);
718 peercaps = gst_pad_peer_query_caps (pad, accumcaps);
720 g_warning ("no peercaps");
723 peercaps = gst_caps_make_writable (peercaps);
724 clear_caps (peercaps, TRUE);
726 g_value_take_boxed (ret, peercaps);
728 return !gst_caps_is_empty (peercaps);
732 gst_rtp_mux_getcaps (GstPad * pad, GstRTPMux * mux, GstCaps * filter)
734 GstCaps *caps = NULL;
735 GstIterator *iter = NULL;
737 GstIteratorResult res;
741 const GstStructure *structure;
743 peercaps = gst_pad_peer_query_caps (mux->srcpad, NULL);
746 tcaps = gst_pad_get_pad_template_caps (pad);
747 othercaps = gst_caps_intersect_full (peercaps, tcaps,
748 GST_CAPS_INTERSECT_FIRST);
749 gst_caps_unref (peercaps);
751 tcaps = gst_pad_get_pad_template_caps (mux->srcpad);
753 othercaps = gst_caps_intersect_full (filter, tcaps,
754 GST_CAPS_INTERSECT_FIRST);
756 othercaps = gst_caps_copy (tcaps);
758 gst_caps_unref (tcaps);
760 GST_LOG_OBJECT (pad, "Intersected srcpad-peercaps and template caps: %"
761 GST_PTR_FORMAT, othercaps);
763 structure = gst_caps_get_structure (othercaps, 0);
764 if (mux->ssrc == DEFAULT_SSRC) {
765 if (gst_structure_get_uint (structure, "ssrc", &mux->current_ssrc))
766 GST_DEBUG_OBJECT (pad, "Use downstream ssrc: %u", mux->current_ssrc);
769 clear_caps (othercaps, TRUE);
771 g_value_init (&v, GST_TYPE_CAPS);
773 iter = gst_element_iterate_sink_pads (GST_ELEMENT (mux));
775 gst_value_set_caps (&v, othercaps);
776 res = gst_iterator_fold (iter, same_clock_rate_fold, &v, pad);
777 gst_iterator_resync (iter);
778 } while (res == GST_ITERATOR_RESYNC);
779 gst_iterator_free (iter);
781 caps = gst_caps_intersect ((GstCaps *) gst_value_get_caps (&v), othercaps);
784 gst_caps_unref (othercaps);
786 if (res == GST_ITERATOR_ERROR) {
787 gst_caps_unref (caps);
788 caps = gst_caps_new_empty ();
796 gst_rtp_mux_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
798 GstRTPMux *mux = GST_RTP_MUX (parent);
799 gboolean res = FALSE;
801 switch (GST_QUERY_TYPE (query)) {
804 GstCaps *filter, *caps;
806 gst_query_parse_caps (query, &filter);
807 GST_LOG_OBJECT (pad, "Received caps-query with filter-caps: %"
808 GST_PTR_FORMAT, filter);
809 caps = gst_rtp_mux_getcaps (pad, mux, filter);
810 gst_query_set_caps_result (query, caps);
811 GST_LOG_OBJECT (mux, "Answering caps-query with caps: %"
812 GST_PTR_FORMAT, caps);
813 gst_caps_unref (caps);
818 res = gst_pad_query_default (pad, parent, query);
826 gst_rtp_mux_get_property (GObject * object,
827 guint prop_id, GValue * value, GParamSpec * pspec)
831 rtp_mux = GST_RTP_MUX (object);
833 GST_OBJECT_LOCK (rtp_mux);
835 case PROP_TIMESTAMP_OFFSET:
836 g_value_set_int (value, rtp_mux->ts_offset);
838 case PROP_SEQNUM_OFFSET:
839 g_value_set_int (value, rtp_mux->seqnum_offset);
842 g_value_set_uint (value, rtp_mux->seqnum);
845 g_value_set_uint (value, rtp_mux->ssrc);
848 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
851 GST_OBJECT_UNLOCK (rtp_mux);
855 gst_rtp_mux_set_property (GObject * object,
856 guint prop_id, const GValue * value, GParamSpec * pspec)
860 rtp_mux = GST_RTP_MUX (object);
863 case PROP_TIMESTAMP_OFFSET:
864 rtp_mux->ts_offset = g_value_get_int (value);
866 case PROP_SEQNUM_OFFSET:
867 rtp_mux->seqnum_offset = g_value_get_int (value);
870 GST_OBJECT_LOCK (rtp_mux);
871 rtp_mux->ssrc = g_value_get_uint (value);
872 rtp_mux->current_ssrc = rtp_mux->ssrc;
873 rtp_mux->have_ssrc = TRUE;
874 rtp_mux->ssrc_random = FALSE;
875 GST_OBJECT_UNLOCK (rtp_mux);
878 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
884 gst_rtp_mux_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
886 GstRTPMux *mux = GST_RTP_MUX (parent);
890 GST_OBJECT_LOCK (mux);
891 is_pad = (pad == mux->last_pad);
892 GST_OBJECT_UNLOCK (mux);
894 switch (GST_EVENT_TYPE (event)) {
899 gst_event_parse_caps (event, &caps);
900 GST_LOG_OBJECT (pad, "Received caps-event with caps: %"
901 GST_PTR_FORMAT, caps);
902 ret = gst_rtp_mux_setcaps (pad, mux, caps);
903 gst_event_unref (event);
906 case GST_EVENT_FLUSH_STOP:
908 GST_OBJECT_LOCK (mux);
909 mux->last_stop = GST_CLOCK_TIME_NONE;
910 GST_OBJECT_UNLOCK (mux);
913 case GST_EVENT_SEGMENT:
915 GstRTPMuxPadPrivate *padpriv;
917 GST_OBJECT_LOCK (mux);
918 padpriv = gst_pad_get_element_private (pad);
921 gst_event_copy_segment (event, &padpriv->segment);
923 GST_OBJECT_UNLOCK (mux);
926 GstSegment new_segment;
927 gst_segment_init (&new_segment, GST_FORMAT_TIME);
928 gst_event_unref (event);
929 event = gst_event_new_segment (&new_segment);
938 return gst_pad_push_event (mux->srcpad, event);
940 gst_event_unref (event);
946 gst_rtp_mux_ready_to_paused (GstRTPMux * rtp_mux)
949 GST_OBJECT_LOCK (rtp_mux);
951 g_clear_object (&rtp_mux->last_pad);
952 rtp_mux->send_stream_start = TRUE;
954 if (rtp_mux->seqnum_offset == -1)
955 rtp_mux->seqnum_base = g_random_int_range (0, G_MAXUINT16);
957 rtp_mux->seqnum_base = rtp_mux->seqnum_offset;
958 rtp_mux->seqnum = rtp_mux->seqnum_base;
960 if (rtp_mux->ts_offset == -1)
961 rtp_mux->ts_base = g_random_int ();
963 rtp_mux->ts_base = rtp_mux->ts_offset;
965 rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
967 if (rtp_mux->ssrc_random) {
968 rtp_mux->have_ssrc = FALSE;
970 rtp_mux->current_ssrc = rtp_mux->ssrc;
971 rtp_mux->have_ssrc = TRUE;
974 GST_DEBUG_OBJECT (rtp_mux, "set timestamp-offset to %u", rtp_mux->ts_base);
976 GST_OBJECT_UNLOCK (rtp_mux);
979 static GstStateChangeReturn
980 gst_rtp_mux_change_state (GstElement * element, GstStateChange transition)
983 GstStateChangeReturn ret;
985 rtp_mux = GST_RTP_MUX (element);
987 switch (transition) {
988 case GST_STATE_CHANGE_READY_TO_PAUSED:
989 gst_rtp_mux_ready_to_paused (rtp_mux);
995 ret = GST_ELEMENT_CLASS (gst_rtp_mux_parent_class)->change_state (element,
998 switch (transition) {
999 case GST_STATE_CHANGE_PAUSED_TO_READY:
1000 g_clear_object (&rtp_mux->last_pad);
1010 gst_rtp_mux_plugin_init (GstPlugin * plugin)
1012 GST_DEBUG_CATEGORY_INIT (gst_rtp_mux_debug, "rtpmux", 0, "rtp muxer");
1014 return gst_element_register (plugin, "rtpmux", GST_RANK_NONE,