1 /* RTP muxer element for GStreamer
5 * Copyright (C) <2007> Nokia Corporation.
6 * Contact: Zeeshan Ali <zeeshan.ali@nokia.com>
7 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
8 * 2000,2005 Wim Taymans <wim@fluendo.com>
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Library General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Library General Public License for more details.
20 * You should have received a copy of the GNU Library General Public
21 * License along with this library; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 02111-1307, USA.
27 * SECTION:element-rtpmux
28 * @short_description: Muxer that takes one or several RTP streams
29 * and muxes them to a single rtp stream.
40 #include <gst/rtp/gstrtpbuffer.h>
41 #include <gstrtpmux.h>
44 GST_DEBUG_CATEGORY_STATIC (gst_rtp_mux_debug);
45 #define GST_CAT_DEFAULT gst_rtp_mux_debug
47 /* elementfactory information */
48 static const GstElementDetails gst_rtp_mux_details =
49 GST_ELEMENT_DETAILS ("RTP muxer",
51 "multiplex N rtp streams into one",
52 "Zeeshan Ali <first.last@nokia.com>");
58 PROP_TIMESTAMP_OFFSET,
64 #define DEFAULT_TIMESTAMP_OFFSET -1
65 #define DEFAULT_SEQNUM_OFFSET -1
66 #define DEFAULT_SSRC -1
67 #define DEFAULT_CLOCK_RATE 0
72 } GstRTPMuxPadPrivate;
74 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
77 GST_STATIC_CAPS ("application/x-rtp")
80 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%d",
83 GST_STATIC_CAPS ("application/x-rtp")
86 static void gst_rtp_mux_base_init (gpointer g_class);
87 static void gst_rtp_mux_class_init (GstRTPMuxClass * klass);
88 static void gst_rtp_mux_init (GstRTPMux * rtp_mux);
90 static void gst_rtp_mux_finalize (GObject * object);
92 static GstPad *gst_rtp_mux_request_new_pad (GstElement * element,
93 GstPadTemplate * templ, const gchar * name);
94 static void gst_rtp_mux_release_pad (GstElement * element, GstPad *pad);
95 static GstFlowReturn gst_rtp_mux_chain (GstPad * pad,
97 static gboolean gst_rtp_mux_setcaps (GstPad *pad, GstCaps *caps);
99 static GstStateChangeReturn gst_rtp_mux_change_state (GstElement *
100 element, GstStateChange transition);
102 static void gst_rtp_mux_set_property (GObject * object, guint prop_id,
103 const GValue * value, GParamSpec * pspec);
104 static void gst_rtp_mux_get_property (GObject * object, guint prop_id,
105 GValue * value, GParamSpec * pspec);
107 static gboolean gst_rtp_mux_src_event (GstPad * pad, GstEvent * event);
109 static GstElementClass *parent_class = NULL;
112 gst_rtp_mux_get_type (void)
114 static GType rtp_mux_type = 0;
117 static const GTypeInfo rtp_mux_info = {
118 sizeof (GstRTPMuxClass),
119 gst_rtp_mux_base_init,
121 (GClassInitFunc) gst_rtp_mux_class_init,
126 (GInstanceInitFunc) gst_rtp_mux_init,
130 g_type_register_static (GST_TYPE_ELEMENT, "GstRTPMux",
137 gst_rtp_mux_base_init (gpointer g_class)
139 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
141 gst_element_class_add_pad_template (element_class,
142 gst_static_pad_template_get (&src_factory));
143 gst_element_class_add_pad_template (element_class,
144 gst_static_pad_template_get (&sink_factory));
146 gst_element_class_set_details (element_class, &gst_rtp_mux_details);
150 gst_rtp_mux_class_init (GstRTPMuxClass * klass)
152 GObjectClass *gobject_class;
153 GstElementClass *gstelement_class;
155 gobject_class = (GObjectClass *) klass;
156 gstelement_class = (GstElementClass *) klass;
158 parent_class = g_type_class_peek_parent (klass);
160 gobject_class->finalize = gst_rtp_mux_finalize;
161 gobject_class->get_property = gst_rtp_mux_get_property;
162 gobject_class->set_property = gst_rtp_mux_set_property;
164 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_CLOCK_RATE,
165 g_param_spec_uint ("clock-rate", "clockrate",
166 "The clock-rate of the RTP streams",
167 0, G_MAXUINT, DEFAULT_CLOCK_RATE, G_PARAM_READWRITE));
168 g_object_class_install_property (G_OBJECT_CLASS (klass),
169 PROP_TIMESTAMP_OFFSET, g_param_spec_int ("timestamp-offset",
171 "Offset to add to all outgoing timestamps (-1 = random)", -1,
172 G_MAXINT, DEFAULT_TIMESTAMP_OFFSET, G_PARAM_READWRITE));
173 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SEQNUM_OFFSET,
174 g_param_spec_int ("seqnum-offset", "Sequence number Offset",
175 "Offset to add to all outgoing seqnum (-1 = random)", -1, G_MAXINT,
176 DEFAULT_SEQNUM_OFFSET, G_PARAM_READWRITE));
177 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SEQNUM,
178 g_param_spec_uint ("seqnum", "Sequence number",
179 "The RTP sequence number of the last processed packet",
180 0, G_MAXUINT, 0, G_PARAM_READABLE));
181 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SSRC,
182 g_param_spec_uint ("ssrc", "SSRC",
183 "The SSRC of the packets (-1 == random)",
184 0, G_MAXUINT, DEFAULT_SSRC, G_PARAM_READWRITE));
186 gstelement_class->request_new_pad = gst_rtp_mux_request_new_pad;
187 gstelement_class->release_pad = gst_rtp_mux_release_pad;
188 gstelement_class->change_state = gst_rtp_mux_change_state;
190 klass->chain_func = gst_rtp_mux_chain;
193 static gboolean gst_rtp_mux_src_event (GstPad * pad,
199 gboolean result = FALSE;
200 gboolean done = FALSE;
202 rtp_mux = gst_pad_get_parent_element (pad);
203 g_return_val_if_fail (rtp_mux != NULL, FALSE);
205 iter = gst_element_iterate_sink_pads (rtp_mux);
208 switch (gst_iterator_next (iter, (gpointer) &sinkpad)) {
209 case GST_ITERATOR_OK:
210 gst_event_ref (event);
211 result |= gst_pad_push_event (sinkpad, event);
212 gst_object_unref (sinkpad);
214 case GST_ITERATOR_RESYNC:
215 gst_iterator_resync (iter);
218 case GST_ITERATOR_ERROR:
219 GST_WARNING_OBJECT (rtp_mux, "Error iterating sinkpads");
220 case GST_ITERATOR_DONE:
225 gst_iterator_free (iter);
226 gst_object_unref (rtp_mux);
227 gst_event_unref (event);
233 gst_rtp_mux_init (GstRTPMux * rtp_mux)
235 GstElementClass *klass = GST_ELEMENT_GET_CLASS (rtp_mux);
238 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
240 gst_pad_set_event_function (rtp_mux->srcpad, gst_rtp_mux_src_event);
241 gst_element_add_pad (GST_ELEMENT (rtp_mux), rtp_mux->srcpad);
243 rtp_mux->ssrc = DEFAULT_SSRC;
244 rtp_mux->ts_offset = DEFAULT_TIMESTAMP_OFFSET;
245 rtp_mux->seqnum_offset = DEFAULT_SEQNUM_OFFSET;
246 rtp_mux->clock_rate = DEFAULT_CLOCK_RATE;
250 gst_rtp_mux_finalize (GObject * object)
254 rtp_mux = GST_RTP_MUX (object);
256 G_OBJECT_CLASS (parent_class)->finalize (object);
260 gst_rtp_mux_create_sinkpad (GstRTPMux * rtp_mux, GstPadTemplate * templ)
262 GstPad *newpad = NULL;
263 GstPadTemplate * class_templ;
265 class_templ = gst_element_class_get_pad_template (
266 GST_ELEMENT_GET_CLASS (rtp_mux), "sink_%d");
268 if (templ == class_templ) {
271 /* create new pad with the name */
272 name = g_strdup_printf ("sink_%02d", rtp_mux->numpads);
273 newpad = gst_pad_new_from_template (templ, name);
278 GST_WARNING_OBJECT (rtp_mux, "this is not our template!\n");
285 gst_rtp_mux_setup_sinkpad (GstRTPMux * rtp_mux, GstPad * sinkpad)
287 GstRTPMuxClass *klass;
288 GstRTPMuxPadPrivate *padpriv = g_slice_new0 (GstRTPMuxPadPrivate);
290 klass = GST_RTP_MUX_GET_CLASS (rtp_mux);
292 /* setup some pad functions */
293 gst_pad_set_setcaps_function (sinkpad, gst_rtp_mux_setcaps);
294 if (klass->chain_func)
295 gst_pad_set_chain_function (sinkpad, klass->chain_func);
296 if (klass->sink_event_func)
297 gst_pad_set_event_function (sinkpad, klass->sink_event_func);
299 /* This could break with gstreamer 0.10.9 */
300 gst_pad_set_active (sinkpad, TRUE);
302 gst_pad_set_element_private (sinkpad, padpriv);
304 /* dd the pad to the element */
305 gst_element_add_pad (GST_ELEMENT (rtp_mux), sinkpad);
309 gst_rtp_mux_request_new_pad (GstElement * element,
310 GstPadTemplate * templ, const gchar * req_name)
315 g_return_val_if_fail (templ != NULL, NULL);
316 g_return_val_if_fail (GST_IS_RTP_MUX (element), NULL);
318 rtp_mux = GST_RTP_MUX (element);
320 if (templ->direction != GST_PAD_SINK) {
321 GST_WARNING_OBJECT (rtp_mux, "request pad that is not a SINK pad");
325 newpad = gst_rtp_mux_create_sinkpad (rtp_mux, templ);
327 gst_rtp_mux_setup_sinkpad (rtp_mux, newpad);
329 GST_WARNING_OBJECT (rtp_mux, "failed to create request pad");
335 gst_rtp_mux_release_pad (GstElement * element, GstPad *pad)
337 GstRTPMuxPadPrivate *padpriv = gst_pad_get_element_private (pad);
340 g_slice_free (GstRTPMuxPadPrivate, padpriv);
341 gst_pad_set_element_private (pad, NULL);
343 gst_element_remove_pad (element, pad);
346 /* Put our own clock-base on the buffer */
348 gst_rtp_mux_readjust_rtp_timestamp (GstRTPMux * rtp_mux, GstPad * pad,
352 guint32 sink_ts_base = 0;
353 GstRTPMuxPadPrivate *padpriv = gst_pad_get_element_private (pad);
355 if (padpriv->have_base)
356 sink_ts_base = padpriv->clock_base;
358 ts = gst_rtp_buffer_get_timestamp (buffer) - sink_ts_base + rtp_mux->ts_base;
359 GST_LOG_OBJECT (rtp_mux, "Re-adjusting RTP ts %u to %u",
360 gst_rtp_buffer_get_timestamp (buffer), ts);
361 gst_rtp_buffer_set_timestamp (buffer, ts);
365 gst_rtp_mux_chain (GstPad * pad, GstBuffer * buffer)
368 GstStructure * structure;
371 rtp_mux = GST_RTP_MUX (gst_pad_get_parent (pad));
373 buffer = gst_buffer_make_writable(buffer);
376 gst_rtp_buffer_set_seq (buffer, rtp_mux->seqnum);
377 GST_BUFFER_CAPS (buffer) = gst_caps_make_writable(GST_BUFFER_CAPS (buffer));
378 structure = gst_caps_get_structure (GST_BUFFER_CAPS (buffer), 0U);
379 gst_structure_set (structure, "seqnum-base", G_TYPE_UINT, rtp_mux->seqnum_base, NULL);
380 gst_rtp_buffer_set_ssrc (buffer, rtp_mux->current_ssrc);
381 gst_rtp_mux_readjust_rtp_timestamp (rtp_mux, pad, buffer);
382 GST_LOG_OBJECT (rtp_mux, "Pushing packet size %d, seq=%d, ts=%u",
383 GST_BUFFER_SIZE (buffer), rtp_mux->seqnum);
385 gst_buffer_set_caps (buffer, GST_PAD_CAPS (rtp_mux->srcpad));
387 ret = gst_pad_push (rtp_mux->srcpad, buffer);
389 gst_object_unref (rtp_mux);
394 gst_rtp_mux_set_clock_rate (GstRTPMux *rtp_mux, gint clock_rate)
398 if (rtp_mux->clock_rate == 0) {
399 rtp_mux->clock_rate = clock_rate;
403 else if (rtp_mux->clock_rate != clock_rate) {
404 GST_WARNING_OBJECT (rtp_mux, "Clock-rate already set to: %u",
405 rtp_mux->clock_rate);
413 gst_rtp_mux_setcaps (GstPad *pad, GstCaps *caps)
416 GstStructure *structure;
419 GstRTPMuxPadPrivate *padpriv = gst_pad_get_element_private (pad);
421 rtp_mux = GST_RTP_MUX (gst_pad_get_parent (pad));
423 structure = gst_caps_get_structure (caps, 0);
424 if (gst_structure_get_int (structure, "clock-rate", &clock_rate)) {
425 ret = gst_rtp_mux_set_clock_rate (rtp_mux, clock_rate);
431 if (gst_structure_get_uint (structure, "clock-base", &padpriv->clock_base)) {
432 padpriv->have_base = TRUE;
435 caps = gst_caps_copy (caps);
437 gst_caps_set_simple (caps,
438 "clock-base", G_TYPE_UINT, rtp_mux->ts_base,
439 "seqnum-base", G_TYPE_UINT, rtp_mux->seqnum_base,
442 GST_DEBUG_OBJECT (rtp_mux,
443 "setting caps %" GST_PTR_FORMAT " on src pad..", caps);
444 ret = gst_pad_set_caps (rtp_mux->srcpad, caps);
445 gst_caps_unref (caps);
448 gst_object_unref (rtp_mux);
454 gst_rtp_mux_get_property (GObject * object,
455 guint prop_id, GValue * value, GParamSpec * pspec)
459 rtp_mux = GST_RTP_MUX (object);
462 case PROP_CLOCK_RATE:
463 g_value_set_uint (value, rtp_mux->clock_rate);
465 case PROP_TIMESTAMP_OFFSET:
466 g_value_set_int (value, rtp_mux->ts_offset);
468 case PROP_SEQNUM_OFFSET:
469 g_value_set_int (value, rtp_mux->seqnum_offset);
472 g_value_set_uint (value, rtp_mux->seqnum);
475 g_value_set_uint (value, rtp_mux->ssrc);
478 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
484 gst_rtp_mux_set_property (GObject * object,
485 guint prop_id, const GValue * value, GParamSpec * pspec)
489 rtp_mux = GST_RTP_MUX (object);
492 case PROP_CLOCK_RATE:
493 rtp_mux->clock_rate = g_value_get_uint (value);
495 case PROP_TIMESTAMP_OFFSET:
496 rtp_mux->ts_offset = g_value_get_int (value);
498 case PROP_SEQNUM_OFFSET:
499 rtp_mux->seqnum_offset = g_value_get_int (value);
502 rtp_mux->ssrc = g_value_get_uint (value);
505 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
511 gst_rtp_mux_ready_to_paused (GstRTPMux * rtp_mux)
513 if (rtp_mux->ssrc == -1)
514 rtp_mux->current_ssrc = g_random_int ();
516 rtp_mux->current_ssrc = rtp_mux->ssrc;
518 if (rtp_mux->seqnum_offset == -1)
519 rtp_mux->seqnum_base = g_random_int_range (0, G_MAXUINT16);
521 rtp_mux->seqnum_base = rtp_mux->seqnum_offset;
522 rtp_mux->seqnum = rtp_mux->seqnum_base;
524 if (rtp_mux->ts_offset == -1)
525 rtp_mux->ts_base = g_random_int ();
527 rtp_mux->ts_base = rtp_mux->ts_offset;
528 GST_DEBUG_OBJECT (rtp_mux, "set clock-base to %u", rtp_mux->ts_base);
531 static GstStateChangeReturn
532 gst_rtp_mux_change_state (GstElement * element, GstStateChange transition)
536 rtp_mux = GST_RTP_MUX (element);
538 switch (transition) {
539 case GST_STATE_CHANGE_NULL_TO_READY:
541 case GST_STATE_CHANGE_READY_TO_PAUSED:
542 gst_rtp_mux_ready_to_paused (rtp_mux);
544 case GST_STATE_CHANGE_PAUSED_TO_READY:
550 return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
554 gst_rtp_mux_plugin_init (GstPlugin * plugin)
556 GST_DEBUG_CATEGORY_INIT (gst_rtp_mux_debug, "rtpmux", 0,
559 return gst_element_register (plugin, "rtpmux", GST_RANK_NONE,