2 * Copyright (C) <2005> Wim Taymans <wim@fluendo.com>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more
21 #include <gst/rtp/gstrtpbuffer.h>
23 #include "gstbasertppayload.h"
25 GST_DEBUG_CATEGORY (basertppayload_debug);
26 #define GST_CAT_DEFAULT (basertppayload_debug)
28 /* BaseRTPPayload signals and args */
35 #define DEFAULT_MTU 1024
37 #define DEFAULT_SSRC -1
38 #define DEFAULT_TIMESTAMP_OFFSET -1
39 #define DEFAULT_SEQNUM_OFFSET -1
40 #define DEFAULT_MAX_PTIME -1
48 PROP_TIMESTAMP_OFFSET,
55 static void gst_basertppayload_class_init (GstBaseRTPPayloadClass * klass);
56 static void gst_basertppayload_base_init (GstBaseRTPPayloadClass * klass);
57 static void gst_basertppayload_init (GstBaseRTPPayload * basertppayload,
59 static void gst_basertppayload_finalize (GObject * object);
61 static gboolean gst_basertppayload_setcaps (GstPad * pad, GstCaps * caps);
62 static gboolean gst_basertppayload_event (GstPad * pad, GstEvent * event);
63 static GstFlowReturn gst_basertppayload_chain (GstPad * pad,
66 static void gst_basertppayload_set_property (GObject * object, guint prop_id,
67 const GValue * value, GParamSpec * pspec);
68 static void gst_basertppayload_get_property (GObject * object, guint prop_id,
69 GValue * value, GParamSpec * pspec);
71 static GstStateChangeReturn gst_basertppayload_change_state (GstElement *
72 element, GstStateChange transition);
74 static GstElementClass *parent_class = NULL;
77 gst_basertppayload_get_type (void)
79 static GType basertppayload_type = 0;
81 if (!basertppayload_type) {
82 static const GTypeInfo basertppayload_info = {
83 sizeof (GstBaseRTPPayloadClass),
84 (GBaseInitFunc) gst_basertppayload_base_init,
86 (GClassInitFunc) gst_basertppayload_class_init,
89 sizeof (GstBaseRTPPayload),
91 (GInstanceInitFunc) gst_basertppayload_init,
95 g_type_register_static (GST_TYPE_ELEMENT, "GstBaseRTPPayload",
96 &basertppayload_info, G_TYPE_FLAG_ABSTRACT);
98 return basertppayload_type;
102 gst_basertppayload_base_init (GstBaseRTPPayloadClass * klass)
107 gst_basertppayload_class_init (GstBaseRTPPayloadClass * klass)
109 GObjectClass *gobject_class;
110 GstElementClass *gstelement_class;
112 gobject_class = (GObjectClass *) klass;
113 gstelement_class = (GstElementClass *) klass;
115 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
117 gobject_class->finalize = gst_basertppayload_finalize;
119 gobject_class->set_property = gst_basertppayload_set_property;
120 gobject_class->get_property = gst_basertppayload_get_property;
122 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MTU,
123 g_param_spec_uint ("mtu", "MTU",
124 "Maximum size of one packet",
125 28, G_MAXUINT, DEFAULT_MTU, G_PARAM_READWRITE));
126 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PT,
127 g_param_spec_uint ("pt", "payload type",
128 "The payload type of the packets",
129 0, 0x80, DEFAULT_PT, G_PARAM_READWRITE));
130 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SSRC,
131 g_param_spec_uint ("ssrc", "SSRC",
132 "The SSRC of the packets (-1 == random)",
133 0, G_MAXUINT, DEFAULT_SSRC, G_PARAM_READWRITE));
134 g_object_class_install_property (G_OBJECT_CLASS (klass),
135 PROP_TIMESTAMP_OFFSET, g_param_spec_int ("timestamp-offset",
137 "Offset to add to all outgoing timestamps (-1 = random)", -1,
138 G_MAXINT, DEFAULT_TIMESTAMP_OFFSET, G_PARAM_READWRITE));
139 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SEQNUM_OFFSET,
140 g_param_spec_int ("seqnum-offset", "Sequence number Offset",
141 "Offset to add to all outgoing seqnum (-1 = random)", -1, G_MAXINT,
142 DEFAULT_SEQNUM_OFFSET, G_PARAM_READWRITE));
143 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MAX_PTIME,
144 g_param_spec_int64 ("max-ptime", "Max packet time",
145 "Maximum duration of the packet data in ns (-1 = unlimited up to MTU)",
146 -1, G_MAXINT64, DEFAULT_MAX_PTIME, G_PARAM_READWRITE));
148 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TIMESTAMP,
149 g_param_spec_uint ("timestamp", "Timestamp",
150 "The RTP timestamp of the last processed packet",
151 0, G_MAXUINT, 0, G_PARAM_READABLE));
152 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SEQNUM,
153 g_param_spec_uint ("seqnum", "Sequence number",
154 "The RTP sequence number of the last processed packet",
155 0, G_MAXUINT, 0, G_PARAM_READABLE));
157 gstelement_class->change_state = gst_basertppayload_change_state;
159 GST_DEBUG_CATEGORY_INIT (basertppayload_debug, "basertppayload", 0,
160 "Base class for RTP Payloaders");
164 gst_basertppayload_init (GstBaseRTPPayload * basertppayload, gpointer g_class)
166 GstPadTemplate *templ;
169 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "src");
170 g_return_if_fail (templ != NULL);
172 basertppayload->srcpad = gst_pad_new_from_template (templ, "src");
173 gst_element_add_pad (GST_ELEMENT (basertppayload), basertppayload->srcpad);
176 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "sink");
177 g_return_if_fail (templ != NULL);
179 basertppayload->sinkpad = gst_pad_new_from_template (templ, "sink");
180 gst_pad_set_setcaps_function (basertppayload->sinkpad,
181 gst_basertppayload_setcaps);
182 gst_pad_set_event_function (basertppayload->sinkpad,
183 gst_basertppayload_event);
184 gst_pad_set_chain_function (basertppayload->sinkpad,
185 gst_basertppayload_chain);
186 gst_element_add_pad (GST_ELEMENT (basertppayload), basertppayload->sinkpad);
188 basertppayload->seq_rand = g_rand_new ();
189 basertppayload->ssrc_rand = g_rand_new ();
190 basertppayload->ts_rand = g_rand_new ();
192 basertppayload->mtu = DEFAULT_MTU;
193 basertppayload->pt = DEFAULT_PT;
194 basertppayload->seqnum_offset = DEFAULT_SEQNUM_OFFSET;
195 basertppayload->ssrc = DEFAULT_SSRC;
196 basertppayload->ts_offset = DEFAULT_TIMESTAMP_OFFSET;
197 basertppayload->max_ptime = DEFAULT_MAX_PTIME;
199 basertppayload->clock_rate = 0;
203 gst_basertppayload_finalize (GObject * object)
205 GstBaseRTPPayload *basertppayload;
207 basertppayload = GST_BASE_RTP_PAYLOAD (object);
209 g_rand_free (basertppayload->seq_rand);
210 basertppayload->seq_rand = NULL;
211 g_rand_free (basertppayload->ssrc_rand);
212 basertppayload->ssrc_rand = NULL;
213 g_rand_free (basertppayload->ts_rand);
214 basertppayload->ts_rand = NULL;
216 G_OBJECT_CLASS (parent_class)->finalize (object);
220 gst_basertppayload_setcaps (GstPad * pad, GstCaps * caps)
222 GstBaseRTPPayload *basertppayload;
223 GstBaseRTPPayloadClass *basertppayload_class;
226 basertppayload = GST_BASE_RTP_PAYLOAD (gst_pad_get_parent (pad));
227 basertppayload_class = GST_BASE_RTP_PAYLOAD_GET_CLASS (basertppayload);
229 if (basertppayload_class->set_caps)
230 ret = basertppayload_class->set_caps (basertppayload, caps);
232 gst_object_unref (basertppayload);
238 gst_basertppayload_event (GstPad * pad, GstEvent * event)
240 GstBaseRTPPayload *basertppayload;
243 basertppayload = GST_BASE_RTP_PAYLOAD (gst_pad_get_parent (pad));
245 switch (GST_EVENT_TYPE (event)) {
246 case GST_EVENT_FLUSH_START:
247 res = gst_pad_event_default (pad, event);
249 case GST_EVENT_FLUSH_STOP:
250 res = gst_pad_event_default (pad, event);
251 gst_segment_init (&basertppayload->segment, GST_FORMAT_UNDEFINED);
253 case GST_EVENT_NEWSEGMENT:
258 gint64 start, stop, position;
260 gst_event_parse_new_segment (event, &update, &rate, &fmt, &start, &stop,
262 gst_segment_set_newsegment (&basertppayload->segment, update, rate, fmt,
263 start, stop, position);
267 res = gst_pad_event_default (pad, event);
271 gst_object_unref (basertppayload);
278 gst_basertppayload_chain (GstPad * pad, GstBuffer * buffer)
280 GstBaseRTPPayload *basertppayload;
281 GstBaseRTPPayloadClass *basertppayload_class;
284 basertppayload = GST_BASE_RTP_PAYLOAD (gst_pad_get_parent (pad));
285 basertppayload_class = GST_BASE_RTP_PAYLOAD_GET_CLASS (basertppayload);
287 if (!basertppayload_class->handle_buffer)
290 ret = basertppayload_class->handle_buffer (basertppayload, buffer);
292 gst_object_unref (basertppayload);
299 GST_ELEMENT_ERROR (basertppayload, STREAM, NOT_IMPLEMENTED, (NULL),
300 ("subclass did not implement handle_buffer function"));
301 gst_object_unref (basertppayload);
302 return GST_FLOW_ERROR;
307 gst_basertppayload_set_options (GstBaseRTPPayload * payload,
308 gchar * media, gboolean dynamic, gchar * encoding_name, guint32 clock_rate)
310 g_return_if_fail (payload != NULL);
311 g_return_if_fail (clock_rate != 0);
313 g_free (payload->media);
314 payload->media = g_strdup (media);
315 payload->dynamic = dynamic;
316 g_free (payload->encoding_name);
317 payload->encoding_name = g_strdup (encoding_name);
318 payload->clock_rate = clock_rate;
322 gst_basertppayload_set_outcaps (GstBaseRTPPayload * payload, gchar * fieldname,
328 srccaps = gst_caps_new_simple ("application/x-rtp",
329 "media", G_TYPE_STRING, payload->media,
330 "payload", G_TYPE_INT, GST_BASE_RTP_PAYLOAD_PT (payload),
331 "clock-rate", G_TYPE_INT, payload->clock_rate,
332 "encoding-name", G_TYPE_STRING, payload->encoding_name,
333 "ssrc", G_TYPE_UINT, payload->current_ssrc,
334 "clock-base", G_TYPE_UINT, payload->ts_base,
335 "seqnum-base", G_TYPE_UINT, payload->seqnum_base, NULL);
336 s = gst_caps_get_structure (srccaps, 0);
341 va_start (varargs, fieldname);
342 gst_structure_set_valist (s, fieldname, varargs);
346 gst_pad_set_caps (GST_BASE_RTP_PAYLOAD_SRCPAD (payload), srccaps);
347 gst_caps_unref (srccaps);
353 gst_basertppayload_is_filled (GstBaseRTPPayload * payload,
354 guint size, GstClockTime duration)
356 if (size > payload->mtu)
359 if (payload->max_ptime != -1 && duration >= payload->max_ptime)
366 gst_basertppayload_push (GstBaseRTPPayload * payload, GstBuffer * buffer)
369 GstClockTime timestamp;
372 if (payload->clock_rate == 0)
375 gst_rtp_buffer_set_ssrc (buffer, payload->current_ssrc);
377 gst_rtp_buffer_set_payload_type (buffer, payload->pt);
379 /* can wrap around, which is perfectly fine */
380 gst_rtp_buffer_set_seq (buffer, payload->seqnum++);
382 /* add our random offset to the timestamp */
383 ts = payload->ts_base;
385 timestamp = GST_BUFFER_TIMESTAMP (buffer);
386 if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
390 gst_segment_to_running_time (&payload->segment, GST_FORMAT_TIME,
392 rtime = gst_util_uint64_scale_int (rtime, payload->clock_rate, GST_SECOND);
396 gst_rtp_buffer_set_timestamp (buffer, ts);
398 payload->timestamp = ts;
401 gst_buffer_set_caps (buffer, GST_PAD_CAPS (payload->srcpad));
403 GST_DEBUG_OBJECT (payload, "Pushing packet size %d, seq=%d, ts=%u",
404 GST_BUFFER_SIZE (buffer), payload->seqnum - 1, ts);
406 res = gst_pad_push (payload->srcpad, buffer);
413 GST_ELEMENT_ERROR (payload, STREAM, NOT_IMPLEMENTED, (NULL),
414 ("subclass did not specify clock_rate"));
415 gst_buffer_unref (buffer);
416 return GST_FLOW_ERROR;
421 gst_basertppayload_set_property (GObject * object, guint prop_id,
422 const GValue * value, GParamSpec * pspec)
424 GstBaseRTPPayload *basertppayload;
426 basertppayload = GST_BASE_RTP_PAYLOAD (object);
430 basertppayload->mtu = g_value_get_uint (value);
433 basertppayload->pt = g_value_get_uint (value);
436 basertppayload->ssrc = g_value_get_uint (value);
438 case PROP_TIMESTAMP_OFFSET:
439 basertppayload->ts_offset = g_value_get_int (value);
441 case PROP_SEQNUM_OFFSET:
442 basertppayload->seqnum_offset = g_value_get_int (value);
445 basertppayload->max_ptime = g_value_get_int64 (value);
448 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
454 gst_basertppayload_get_property (GObject * object, guint prop_id,
455 GValue * value, GParamSpec * pspec)
457 GstBaseRTPPayload *basertppayload;
459 basertppayload = GST_BASE_RTP_PAYLOAD (object);
463 g_value_set_uint (value, basertppayload->mtu);
466 g_value_set_uint (value, basertppayload->pt);
469 g_value_set_uint (value, basertppayload->ssrc);
471 case PROP_TIMESTAMP_OFFSET:
472 g_value_set_int (value, basertppayload->ts_offset);
474 case PROP_SEQNUM_OFFSET:
475 g_value_set_int (value, basertppayload->seqnum_offset);
478 g_value_set_int64 (value, basertppayload->max_ptime);
481 g_value_set_uint (value, basertppayload->timestamp);
484 g_value_set_uint (value, basertppayload->seqnum);
487 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
492 static GstStateChangeReturn
493 gst_basertppayload_change_state (GstElement * element,
494 GstStateChange transition)
496 GstBaseRTPPayload *basertppayload;
497 GstStateChangeReturn ret;
499 basertppayload = GST_BASE_RTP_PAYLOAD (element);
501 switch (transition) {
502 case GST_STATE_CHANGE_NULL_TO_READY:
504 case GST_STATE_CHANGE_READY_TO_PAUSED:
505 gst_segment_init (&basertppayload->segment, GST_FORMAT_UNDEFINED);
507 if (basertppayload->seqnum_offset == -1)
508 basertppayload->seqnum_base =
509 g_rand_int_range (basertppayload->seq_rand, 0, G_MAXUINT16);
511 basertppayload->seqnum_base = basertppayload->seqnum_offset;
512 basertppayload->seqnum = basertppayload->seqnum_base;
514 if (basertppayload->ssrc == -1)
515 basertppayload->current_ssrc = g_rand_int (basertppayload->ssrc_rand);
517 basertppayload->current_ssrc = basertppayload->ssrc;
519 if (basertppayload->ts_offset == -1)
520 basertppayload->ts_base = g_rand_int (basertppayload->ts_rand);
522 basertppayload->ts_base = basertppayload->ts_offset;
528 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
530 switch (transition) {
531 case GST_STATE_CHANGE_READY_TO_NULL: