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: %x", 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_INFO_OBJECT (rtp_mux, "New ssrc after collision %x (was: %x)",
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->ts_offset = DEFAULT_TIMESTAMP_OFFSET;
271 rtp_mux->seqnum_offset = DEFAULT_SEQNUM_OFFSET;
273 rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
277 gst_rtp_mux_setup_sinkpad (GstRTPMux * rtp_mux, GstPad * sinkpad)
279 GstRTPMuxPadPrivate *padpriv = g_slice_new0 (GstRTPMuxPadPrivate);
281 /* setup some pad functions */
282 gst_pad_set_chain_function (sinkpad, GST_DEBUG_FUNCPTR (gst_rtp_mux_chain));
283 gst_pad_set_chain_list_function (sinkpad,
284 GST_DEBUG_FUNCPTR (gst_rtp_mux_chain_list));
285 gst_pad_set_event_function (sinkpad,
286 GST_DEBUG_FUNCPTR (gst_rtp_mux_sink_event));
287 gst_pad_set_query_function (sinkpad,
288 GST_DEBUG_FUNCPTR (gst_rtp_mux_sink_query));
291 gst_segment_init (&padpriv->segment, GST_FORMAT_UNDEFINED);
293 gst_pad_set_element_private (sinkpad, padpriv);
295 gst_pad_set_active (sinkpad, TRUE);
296 gst_element_add_pad (GST_ELEMENT (rtp_mux), sinkpad);
300 gst_rtp_mux_request_new_pad (GstElement * element,
301 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
306 g_return_val_if_fail (templ != NULL, NULL);
307 g_return_val_if_fail (GST_IS_RTP_MUX (element), NULL);
309 rtp_mux = GST_RTP_MUX (element);
311 if (templ->direction != GST_PAD_SINK) {
312 GST_WARNING_OBJECT (rtp_mux, "request pad that is not a SINK pad");
316 newpad = gst_pad_new_from_template (templ, req_name);
318 gst_rtp_mux_setup_sinkpad (rtp_mux, newpad);
320 GST_WARNING_OBJECT (rtp_mux, "failed to create request pad");
326 gst_rtp_mux_release_pad (GstElement * element, GstPad * pad)
328 GstRTPMuxPadPrivate *padpriv;
330 GST_OBJECT_LOCK (element);
331 padpriv = gst_pad_get_element_private (pad);
332 gst_pad_set_element_private (pad, NULL);
333 GST_OBJECT_UNLOCK (element);
335 gst_element_remove_pad (element, pad);
338 g_slice_free (GstRTPMuxPadPrivate, padpriv);
342 /* Put our own timestamp-offset on the buffer */
344 gst_rtp_mux_readjust_rtp_timestamp_locked (GstRTPMux * rtp_mux,
345 GstRTPMuxPadPrivate * padpriv, GstRTPBuffer * rtpbuffer)
348 guint32 sink_ts_base = 0;
350 if (padpriv && padpriv->have_timestamp_offset)
351 sink_ts_base = padpriv->timestamp_offset;
353 ts = gst_rtp_buffer_get_timestamp (rtpbuffer) - sink_ts_base +
355 GST_LOG_OBJECT (rtp_mux, "Re-adjusting RTP ts %u to %u",
356 gst_rtp_buffer_get_timestamp (rtpbuffer), ts);
357 gst_rtp_buffer_set_timestamp (rtpbuffer, ts);
361 process_buffer_locked (GstRTPMux * rtp_mux, GstRTPMuxPadPrivate * padpriv,
362 GstRTPBuffer * rtpbuffer)
364 GstRTPMuxClass *klass = GST_RTP_MUX_GET_CLASS (rtp_mux);
366 if (klass->accept_buffer_locked)
367 if (!klass->accept_buffer_locked (rtp_mux, padpriv, rtpbuffer))
371 gst_rtp_buffer_set_seq (rtpbuffer, rtp_mux->seqnum);
373 gst_rtp_buffer_set_ssrc (rtpbuffer, rtp_mux->current_ssrc);
374 gst_rtp_mux_readjust_rtp_timestamp_locked (rtp_mux, padpriv, rtpbuffer);
375 GST_LOG_OBJECT (rtp_mux,
376 "Pushing packet size %" G_GSIZE_FORMAT ", seq=%d, ts=%u, ssrc=%x",
377 rtpbuffer->map[0].size, rtp_mux->seqnum,
378 gst_rtp_buffer_get_timestamp (rtpbuffer), rtp_mux->current_ssrc);
381 if (padpriv->segment.format == GST_FORMAT_TIME) {
382 GST_BUFFER_PTS (rtpbuffer->buffer) =
383 gst_segment_to_running_time (&padpriv->segment, GST_FORMAT_TIME,
384 GST_BUFFER_PTS (rtpbuffer->buffer));
385 GST_BUFFER_DTS (rtpbuffer->buffer) =
386 gst_segment_to_running_time (&padpriv->segment, GST_FORMAT_TIME,
387 GST_BUFFER_DTS (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 gst_pad_mark_reconfigure (rtp_mux->srcpad);
448 if (GST_PAD_IS_FLUSHING (rtp_mux->srcpad))
449 ret = GST_FLOW_FLUSHING;
451 ret = GST_FLOW_NOT_NEGOTIATED;
452 gst_buffer_list_unref (bufferlist);
455 gst_caps_unref (current_caps);
458 GST_OBJECT_LOCK (rtp_mux);
460 padpriv = gst_pad_get_element_private (pad);
462 GST_OBJECT_UNLOCK (rtp_mux);
463 ret = GST_FLOW_NOT_LINKED;
464 gst_buffer_list_unref (bufferlist);
468 bd.rtp_mux = rtp_mux;
469 bd.padpriv = padpriv;
472 bufferlist = gst_buffer_list_make_writable (bufferlist);
473 gst_buffer_list_foreach (bufferlist, process_list_item, &bd);
475 if (!bd.drop && pad != rtp_mux->last_pad) {
477 g_clear_object (&rtp_mux->last_pad);
478 rtp_mux->last_pad = g_object_ref (pad);
481 GST_OBJECT_UNLOCK (rtp_mux);
484 gst_pad_sticky_events_foreach (pad, resend_events, rtp_mux);
487 gst_buffer_list_unref (bufferlist);
490 ret = gst_pad_push_list (rtp_mux->srcpad, bufferlist);
499 resend_events (GstPad * pad, GstEvent ** event, gpointer user_data)
501 GstRTPMux *rtp_mux = user_data;
503 if (GST_EVENT_TYPE (*event) == GST_EVENT_CAPS) {
506 gst_event_parse_caps (*event, &caps);
507 gst_rtp_mux_setcaps (pad, rtp_mux, caps);
508 } else if (GST_EVENT_TYPE (*event) == GST_EVENT_SEGMENT) {
509 GstSegment new_segment;
510 gst_segment_init (&new_segment, GST_FORMAT_TIME);
511 gst_pad_push_event (rtp_mux->srcpad, gst_event_new_segment (&new_segment));
513 gst_pad_push_event (rtp_mux->srcpad, gst_event_ref (*event));
520 gst_rtp_mux_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
524 GstRTPMuxPadPrivate *padpriv;
526 gboolean changed = FALSE;
527 GstRTPBuffer rtpbuffer = GST_RTP_BUFFER_INIT;
529 rtp_mux = GST_RTP_MUX (parent);
531 if (gst_pad_check_reconfigure (rtp_mux->srcpad)) {
532 GstCaps *current_caps = gst_pad_get_current_caps (pad);
534 if (!gst_rtp_mux_setcaps (pad, rtp_mux, current_caps)) {
535 gst_pad_mark_reconfigure (rtp_mux->srcpad);
536 if (GST_PAD_IS_FLUSHING (rtp_mux->srcpad))
537 ret = GST_FLOW_FLUSHING;
539 ret = GST_FLOW_NOT_NEGOTIATED;
540 gst_buffer_unref (buffer);
543 gst_caps_unref (current_caps);
546 GST_OBJECT_LOCK (rtp_mux);
547 padpriv = gst_pad_get_element_private (pad);
550 GST_OBJECT_UNLOCK (rtp_mux);
551 gst_buffer_unref (buffer);
552 return GST_FLOW_NOT_LINKED;
555 buffer = gst_buffer_make_writable (buffer);
557 if (!gst_rtp_buffer_map (buffer, GST_MAP_READWRITE, &rtpbuffer)) {
558 GST_OBJECT_UNLOCK (rtp_mux);
559 gst_buffer_unref (buffer);
560 GST_ERROR_OBJECT (rtp_mux, "Invalid RTP buffer");
561 return GST_FLOW_ERROR;
564 drop = !process_buffer_locked (rtp_mux, padpriv, &rtpbuffer);
566 gst_rtp_buffer_unmap (&rtpbuffer);
569 if (pad != rtp_mux->last_pad) {
571 g_clear_object (&rtp_mux->last_pad);
572 rtp_mux->last_pad = g_object_ref (pad);
575 if (GST_BUFFER_DURATION_IS_VALID (buffer) &&
576 GST_BUFFER_PTS_IS_VALID (buffer))
577 rtp_mux->last_stop = GST_BUFFER_PTS (buffer) +
578 GST_BUFFER_DURATION (buffer);
580 rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
583 GST_OBJECT_UNLOCK (rtp_mux);
586 gst_pad_sticky_events_foreach (pad, resend_events, rtp_mux);
589 gst_buffer_unref (buffer);
592 ret = gst_pad_push (rtp_mux->srcpad, buffer);
600 gst_rtp_mux_setcaps (GstPad * pad, GstRTPMux * rtp_mux, GstCaps * caps)
602 GstStructure *structure;
603 gboolean ret = FALSE;
604 GstRTPMuxPadPrivate *padpriv;
610 if (!gst_caps_is_fixed (caps))
613 peercaps = gst_pad_peer_query_caps (rtp_mux->srcpad, NULL);
615 GstCaps *tcaps, *othercaps;;
616 tcaps = gst_pad_get_pad_template_caps (pad);
617 othercaps = gst_caps_intersect_full (peercaps, tcaps,
618 GST_CAPS_INTERSECT_FIRST);
620 if (gst_caps_get_size (othercaps) > 0) {
621 structure = gst_caps_get_structure (othercaps, 0);
622 GST_OBJECT_LOCK (rtp_mux);
623 if (gst_structure_get_uint (structure, "ssrc", &rtp_mux->current_ssrc)) {
624 GST_INFO_OBJECT (pad, "Use downstream ssrc: %x", rtp_mux->current_ssrc);
625 rtp_mux->have_ssrc = TRUE;
627 if (gst_structure_get_uint (structure,
628 "timestamp-offset", &rtp_mux->ts_base)) {
629 GST_INFO_OBJECT (pad, "Use downstream timestamp-offset: %u",
632 GST_OBJECT_UNLOCK (rtp_mux);
635 gst_caps_unref (othercaps);
637 gst_caps_unref (peercaps);
638 gst_caps_unref (tcaps);
641 structure = gst_caps_get_structure (caps, 0);
646 GST_OBJECT_LOCK (rtp_mux);
647 padpriv = gst_pad_get_element_private (pad);
649 gst_structure_get_uint (structure, "timestamp-offset",
650 &padpriv->timestamp_offset)) {
651 padpriv->have_timestamp_offset = TRUE;
654 caps = gst_caps_copy (caps);
656 /* if we don't have a specified ssrc, first try to take one from the caps,
657 and if that fails, generate one */
658 if (rtp_mux->ssrc == DEFAULT_SSRC) {
659 if (rtp_mux->current_ssrc == DEFAULT_SSRC) {
660 if (!gst_structure_get_uint (structure, "ssrc", &rtp_mux->current_ssrc)) {
661 rtp_mux->current_ssrc = g_random_int ();
662 GST_INFO_OBJECT (rtp_mux, "Set random ssrc %x", rtp_mux->current_ssrc);
666 rtp_mux->current_ssrc = rtp_mux->ssrc;
667 GST_INFO_OBJECT (rtp_mux, "Set ssrc %x", rtp_mux->current_ssrc);
670 gst_caps_set_simple (caps,
671 "timestamp-offset", G_TYPE_UINT, rtp_mux->ts_base,
672 "seqnum-offset", G_TYPE_UINT, rtp_mux->seqnum_base,
673 "ssrc", G_TYPE_UINT, rtp_mux->current_ssrc, NULL);
675 GST_OBJECT_UNLOCK (rtp_mux);
677 if (rtp_mux->send_stream_start) {
680 /* stream-start (FIXME: create id based on input ids) */
681 g_snprintf (s_id, sizeof (s_id), "interleave-%08x", g_random_int ());
682 gst_pad_push_event (rtp_mux->srcpad, gst_event_new_stream_start (s_id));
684 rtp_mux->send_stream_start = FALSE;
687 GST_DEBUG_OBJECT (rtp_mux,
688 "setting caps %" GST_PTR_FORMAT " on src pad..", caps);
689 ret = gst_pad_set_caps (rtp_mux->srcpad, caps);
692 gst_caps_unref (caps);
698 clear_caps (GstCaps * caps, gboolean only_clock_rate)
702 /* Lets only match on the clock-rate */
703 for (i = 0; i < gst_caps_get_size (caps); i++) {
704 GstStructure *s = gst_caps_get_structure (caps, i);
706 for (j = 0; j < gst_structure_n_fields (s); j++) {
707 const gchar *name = gst_structure_nth_field_name (s, j);
709 if (strcmp (name, "clock-rate") && (only_clock_rate ||
710 (strcmp (name, "ssrc")))) {
711 gst_structure_remove_field (s, name);
719 same_clock_rate_fold (const GValue * item, GValue * ret, gpointer user_data)
721 GstPad *mypad = user_data;
722 GstPad *pad = g_value_get_object (item);
729 accumcaps = g_value_get_boxed (ret);
730 peercaps = gst_pad_peer_query_caps (pad, accumcaps);
732 g_warning ("no peercaps");
735 peercaps = gst_caps_make_writable (peercaps);
736 clear_caps (peercaps, TRUE);
738 g_value_take_boxed (ret, peercaps);
740 return !gst_caps_is_empty (peercaps);
744 gst_rtp_mux_getcaps (GstPad * pad, GstRTPMux * mux, GstCaps * filter)
746 GstCaps *caps = NULL;
747 GstIterator *iter = NULL;
749 GstIteratorResult res;
753 const GstStructure *structure;
755 peercaps = gst_pad_peer_query_caps (mux->srcpad, NULL);
758 tcaps = gst_pad_get_pad_template_caps (pad);
759 othercaps = gst_caps_intersect_full (peercaps, tcaps,
760 GST_CAPS_INTERSECT_FIRST);
761 gst_caps_unref (peercaps);
763 tcaps = gst_pad_get_pad_template_caps (mux->srcpad);
765 othercaps = gst_caps_intersect_full (filter, tcaps,
766 GST_CAPS_INTERSECT_FIRST);
768 othercaps = gst_caps_copy (tcaps);
770 gst_caps_unref (tcaps);
772 GST_LOG_OBJECT (pad, "Intersected srcpad-peercaps and template caps: %"
773 GST_PTR_FORMAT, othercaps);
775 structure = gst_caps_get_structure (othercaps, 0);
776 if (mux->ssrc == DEFAULT_SSRC) {
777 if (gst_structure_get_uint (structure, "ssrc", &mux->current_ssrc))
778 GST_DEBUG_OBJECT (pad, "Use downstream ssrc: %x", mux->current_ssrc);
781 clear_caps (othercaps, TRUE);
783 g_value_init (&v, GST_TYPE_CAPS);
785 iter = gst_element_iterate_sink_pads (GST_ELEMENT (mux));
787 gst_value_set_caps (&v, othercaps);
788 res = gst_iterator_fold (iter, same_clock_rate_fold, &v, pad);
789 gst_iterator_resync (iter);
790 } while (res == GST_ITERATOR_RESYNC);
791 gst_iterator_free (iter);
793 caps = gst_caps_intersect ((GstCaps *) gst_value_get_caps (&v), othercaps);
796 gst_caps_unref (othercaps);
798 if (res == GST_ITERATOR_ERROR) {
799 gst_caps_unref (caps);
800 caps = gst_caps_new_empty ();
808 gst_rtp_mux_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
810 GstRTPMux *mux = GST_RTP_MUX (parent);
811 gboolean res = FALSE;
813 switch (GST_QUERY_TYPE (query)) {
816 GstCaps *filter, *caps;
818 gst_query_parse_caps (query, &filter);
819 GST_LOG_OBJECT (pad, "Received caps-query with filter-caps: %"
820 GST_PTR_FORMAT, filter);
821 caps = gst_rtp_mux_getcaps (pad, mux, filter);
822 gst_query_set_caps_result (query, caps);
823 GST_LOG_OBJECT (mux, "Answering caps-query with caps: %"
824 GST_PTR_FORMAT, caps);
825 gst_caps_unref (caps);
830 res = gst_pad_query_default (pad, parent, query);
838 gst_rtp_mux_get_property (GObject * object,
839 guint prop_id, GValue * value, GParamSpec * pspec)
843 rtp_mux = GST_RTP_MUX (object);
845 GST_OBJECT_LOCK (rtp_mux);
847 case PROP_TIMESTAMP_OFFSET:
848 g_value_set_int (value, rtp_mux->ts_offset);
850 case PROP_SEQNUM_OFFSET:
851 g_value_set_int (value, rtp_mux->seqnum_offset);
854 g_value_set_uint (value, rtp_mux->seqnum);
857 g_value_set_uint (value, rtp_mux->ssrc);
860 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
863 GST_OBJECT_UNLOCK (rtp_mux);
867 gst_rtp_mux_set_property (GObject * object,
868 guint prop_id, const GValue * value, GParamSpec * pspec)
872 rtp_mux = GST_RTP_MUX (object);
875 case PROP_TIMESTAMP_OFFSET:
876 rtp_mux->ts_offset = g_value_get_int (value);
878 case PROP_SEQNUM_OFFSET:
879 rtp_mux->seqnum_offset = g_value_get_int (value);
882 GST_OBJECT_LOCK (rtp_mux);
883 rtp_mux->ssrc = g_value_get_uint (value);
884 rtp_mux->current_ssrc = rtp_mux->ssrc;
885 rtp_mux->have_ssrc = TRUE;
886 GST_DEBUG_OBJECT (rtp_mux, "ssrc prop set to %x", rtp_mux->ssrc);
887 GST_OBJECT_UNLOCK (rtp_mux);
890 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
896 gst_rtp_mux_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
898 GstRTPMux *mux = GST_RTP_MUX (parent);
902 GST_OBJECT_LOCK (mux);
903 is_pad = (pad == mux->last_pad);
904 GST_OBJECT_UNLOCK (mux);
906 switch (GST_EVENT_TYPE (event)) {
911 gst_event_parse_caps (event, &caps);
912 GST_LOG_OBJECT (pad, "Received caps-event with caps: %"
913 GST_PTR_FORMAT, caps);
914 ret = gst_rtp_mux_setcaps (pad, mux, caps);
915 gst_event_unref (event);
918 case GST_EVENT_FLUSH_STOP:
920 GST_OBJECT_LOCK (mux);
921 mux->last_stop = GST_CLOCK_TIME_NONE;
922 GST_OBJECT_UNLOCK (mux);
925 case GST_EVENT_SEGMENT:
927 GstRTPMuxPadPrivate *padpriv;
929 GST_OBJECT_LOCK (mux);
930 padpriv = gst_pad_get_element_private (pad);
933 gst_event_copy_segment (event, &padpriv->segment);
935 GST_OBJECT_UNLOCK (mux);
938 GstSegment new_segment;
939 gst_segment_init (&new_segment, GST_FORMAT_TIME);
940 gst_event_unref (event);
941 event = gst_event_new_segment (&new_segment);
950 return gst_pad_push_event (mux->srcpad, event);
952 gst_event_unref (event);
958 gst_rtp_mux_ready_to_paused (GstRTPMux * rtp_mux)
961 GST_OBJECT_LOCK (rtp_mux);
963 g_clear_object (&rtp_mux->last_pad);
964 rtp_mux->send_stream_start = TRUE;
966 if (rtp_mux->seqnum_offset == -1)
967 rtp_mux->seqnum_base = g_random_int_range (0, G_MAXUINT16);
969 rtp_mux->seqnum_base = rtp_mux->seqnum_offset;
970 rtp_mux->seqnum = rtp_mux->seqnum_base;
972 if (rtp_mux->ts_offset == -1)
973 rtp_mux->ts_base = g_random_int ();
975 rtp_mux->ts_base = rtp_mux->ts_offset;
977 rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
979 if (rtp_mux->have_ssrc)
980 rtp_mux->current_ssrc = rtp_mux->ssrc;
982 GST_DEBUG_OBJECT (rtp_mux, "set timestamp-offset to %u", rtp_mux->ts_base);
984 GST_OBJECT_UNLOCK (rtp_mux);
987 static GstStateChangeReturn
988 gst_rtp_mux_change_state (GstElement * element, GstStateChange transition)
991 GstStateChangeReturn ret;
993 rtp_mux = GST_RTP_MUX (element);
995 switch (transition) {
996 case GST_STATE_CHANGE_READY_TO_PAUSED:
997 gst_rtp_mux_ready_to_paused (rtp_mux);
1003 ret = GST_ELEMENT_CLASS (gst_rtp_mux_parent_class)->change_state (element,
1006 switch (transition) {
1007 case GST_STATE_CHANGE_PAUSED_TO_READY:
1008 g_clear_object (&rtp_mux->last_pad);
1018 gst_rtp_mux_plugin_init (GstPlugin * plugin)
1020 GST_DEBUG_CATEGORY_INIT (gst_rtp_mux_debug, "rtpmux", 0, "rtp muxer");
1022 return gst_element_register (plugin, "rtpmux", GST_RANK_NONE,