2 * Copyright (C) <2005> Wim Taymans <wim@fluendo.com>
3 * Copyright (C) <2005> Nokia Corporation <kai.vehmanen@nokia.com>
4 * Copyright (C) <2012> Collabora Ltd.
5 * Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
24 * SECTION:element-udpsrc
25 * @see_also: udpsink, multifdsink
27 * udpsrc is a network source that reads UDP packets from the network.
28 * It can be combined with RTP depayloaders to implement RTP streaming.
30 * The udpsrc element supports automatic port allocation by setting the
31 * #GstUDPSrc:port property to 0. After setting the udpsrc to PAUSED, the
32 * allocated port can be obtained by reading the port property.
34 * udpsrc can read from multicast groups by setting the #GstUDPSrc:multicast-group
35 * property to the IP address of the multicast group.
37 * Alternatively one can provide a custom socket to udpsrc with the #GstUDPSrc:sockfd
38 * property, udpsrc will then not allocate a socket itself but use the provided
41 * The #GstUDPSrc:caps property is mainly used to give a type to the UDP packet
42 * so that they can be autoplugged in GStreamer pipelines. This is very usefull
43 * for RTP implementations where the contents of the UDP packets is transfered
44 * out-of-bounds using SDP or other means.
46 * The #GstUDPSrc:buffer-size property is used to change the default kernel
47 * buffersizes used for receiving packets. The buffer size may be increased for
48 * high-volume connections, or may be decreased to limit the possible backlog of
49 * incoming data. The system places an absolute limit on these values, on Linux,
50 * for example, the default buffer size is typically 50K and can be increased to
53 * The #GstUDPSrc:skip-first-bytes property is used to strip off an arbitrary
54 * number of bytes from the start of the raw udp packet and can be used to strip
55 * off proprietary header, for example.
57 * The udpsrc is always a live source. It does however not provide a #GstClock,
58 * this is left for upstream elements such as an RTP session manager or demuxer
59 * (such as an MPEG demuxer). As with all live sources, the captured buffers
60 * will have their timestamp set to the current running time of the pipeline.
62 * udpsrc implements a #GstURIHandler interface that handles udp://host:port
65 * If the #GstUDPSrc:timeout property is set to a value bigger than 0, udpsrc
66 * will generate an element message named
67 * <classname>"GstUDPSrcTimeout"</classname>
68 * if no data was recieved in the given timeout.
69 * The message's structure contains one field:
74 * <classname>"timeout"</classname>: the timeout in microseconds that
75 * expired when waiting for data.
79 * The message is typically used to detect that no UDP arrives in the receiver
80 * because it is blocked by a firewall.
83 * A custom file descriptor can be configured with the
84 * #GstUDPSrc:sockfd property. The socket will be closed when setting the
85 * element to READY by default. This behaviour can be
86 * overriden with the #GstUDPSrc:closefd property, in which case the application
87 * is responsible for closing the file descriptor.
90 * <title>Examples</title>
92 * gst-launch -v udpsrc ! fakesink dump=1
93 * ]| A pipeline to read from the default port and dump the udp packets.
94 * To actually generate udp packets on the default port one can use the
95 * udpsink element. When running the following pipeline in another terminal, the
96 * above mentioned pipeline should dump data packets to the console.
98 * gst-launch -v audiotestsrc ! udpsink
101 * gst-launch -v udpsrc port=0 ! fakesink
102 * ]| read udp packets from a free port.
105 * Last reviewed on 2007-09-20 (0.10.7)
111 #include "gstudpsrc.h"
113 #include <gst/net/gstnetaddressmeta.h>
114 #include <sys/socket.h>
116 GST_DEBUG_CATEGORY_STATIC (udpsrc_debug);
117 #define GST_CAT_DEFAULT (udpsrc_debug)
119 static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
122 GST_STATIC_CAPS_ANY);
124 #define UDP_DEFAULT_PORT 4951
125 #define UDP_DEFAULT_MULTICAST_GROUP "0.0.0.0"
126 #define UDP_DEFAULT_MULTICAST_IFACE NULL
127 #define UDP_DEFAULT_URI "udp://"UDP_DEFAULT_MULTICAST_GROUP":"G_STRINGIFY(UDP_DEFAULT_PORT)
128 #define UDP_DEFAULT_CAPS NULL
129 #define UDP_DEFAULT_SOCKET NULL
130 #define UDP_DEFAULT_BUFFER_SIZE 0
131 #define UDP_DEFAULT_TIMEOUT 0
132 #define UDP_DEFAULT_SKIP_FIRST_BYTES 0
133 #define UDP_DEFAULT_CLOSE_SOCKET TRUE
134 #define UDP_DEFAULT_USED_SOCKET NULL
135 #define UDP_DEFAULT_AUTO_MULTICAST TRUE
136 #define UDP_DEFAULT_REUSE TRUE
143 PROP_MULTICAST_GROUP,
144 PROP_MULTICAST_IFACE,
150 PROP_SKIP_FIRST_BYTES,
159 static void gst_udpsrc_uri_handler_init (gpointer g_iface, gpointer iface_data);
161 static GstCaps *gst_udpsrc_getcaps (GstBaseSrc * src, GstCaps * filter);
163 static GstFlowReturn gst_udpsrc_create (GstPushSrc * psrc, GstBuffer ** buf);
165 static gboolean gst_udpsrc_start (GstBaseSrc * bsrc);
167 static gboolean gst_udpsrc_stop (GstBaseSrc * bsrc);
169 static gboolean gst_udpsrc_unlock (GstBaseSrc * bsrc);
171 static gboolean gst_udpsrc_unlock_stop (GstBaseSrc * bsrc);
173 static void gst_udpsrc_finalize (GObject * object);
175 static void gst_udpsrc_set_property (GObject * object, guint prop_id,
176 const GValue * value, GParamSpec * pspec);
177 static void gst_udpsrc_get_property (GObject * object, guint prop_id,
178 GValue * value, GParamSpec * pspec);
180 #define gst_udpsrc_parent_class parent_class
181 G_DEFINE_TYPE_WITH_CODE (GstUDPSrc, gst_udpsrc, GST_TYPE_PUSH_SRC,
182 G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER, gst_udpsrc_uri_handler_init));
185 gst_udpsrc_class_init (GstUDPSrcClass * klass)
187 GObjectClass *gobject_class;
188 GstElementClass *gstelement_class;
189 GstBaseSrcClass *gstbasesrc_class;
190 GstPushSrcClass *gstpushsrc_class;
192 gobject_class = (GObjectClass *) klass;
193 gstelement_class = (GstElementClass *) klass;
194 gstbasesrc_class = (GstBaseSrcClass *) klass;
195 gstpushsrc_class = (GstPushSrcClass *) klass;
197 GST_DEBUG_CATEGORY_INIT (udpsrc_debug, "udpsrc", 0, "UDP src");
199 gobject_class->set_property = gst_udpsrc_set_property;
200 gobject_class->get_property = gst_udpsrc_get_property;
201 gobject_class->finalize = gst_udpsrc_finalize;
203 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PORT,
204 g_param_spec_int ("port", "Port",
205 "The port to receive the packets from, 0=allocate", 0, G_MAXUINT16,
206 UDP_DEFAULT_PORT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
207 g_object_class_install_property (gobject_class, PROP_MULTICAST_GROUP,
208 g_param_spec_string ("multicast-group", "Multicast Group",
209 "The Address of multicast group to join", UDP_DEFAULT_MULTICAST_GROUP,
210 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
211 g_object_class_install_property (gobject_class, PROP_MULTICAST_IFACE,
212 g_param_spec_string ("multicast-iface", "Multicast Interface",
213 "The network interface on which to join the multicast group",
214 UDP_DEFAULT_MULTICAST_IFACE,
215 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
216 g_object_class_install_property (gobject_class, PROP_URI,
217 g_param_spec_string ("uri", "URI",
218 "URI in the form of udp://multicast_group:port", UDP_DEFAULT_URI,
219 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
220 g_object_class_install_property (gobject_class, PROP_CAPS,
221 g_param_spec_boxed ("caps", "Caps",
222 "The caps of the source pad", GST_TYPE_CAPS,
223 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
224 g_object_class_install_property (gobject_class, PROP_SOCKET,
225 g_param_spec_object ("socket", "Socket",
226 "Socket to use for UDP reception. (NULL == allocate)",
227 G_TYPE_SOCKET, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
228 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BUFFER_SIZE,
229 g_param_spec_int ("buffer-size", "Buffer Size",
230 "Size of the kernel receive buffer in bytes, 0=default", 0, G_MAXINT,
231 UDP_DEFAULT_BUFFER_SIZE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
232 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TIMEOUT,
233 g_param_spec_uint64 ("timeout", "Timeout",
234 "Post a message after timeout nanoseconds (0 = disabled)", 0,
235 G_MAXUINT64, UDP_DEFAULT_TIMEOUT,
236 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
237 g_object_class_install_property (G_OBJECT_CLASS (klass),
238 PROP_SKIP_FIRST_BYTES, g_param_spec_int ("skip-first-bytes",
239 "Skip first bytes", "number of bytes to skip for each udp packet", 0,
240 G_MAXINT, UDP_DEFAULT_SKIP_FIRST_BYTES,
241 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
242 g_object_class_install_property (gobject_class, PROP_CLOSE_SOCKET,
243 g_param_spec_boolean ("close-socket", "Close socket",
244 "Close socket if passed as property on state change",
245 UDP_DEFAULT_CLOSE_SOCKET,
246 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
247 g_object_class_install_property (gobject_class, PROP_USED_SOCKET,
248 g_param_spec_object ("used-socket", "Socket Handle",
249 "Socket currently in use for UDP reception. (NULL = no socket)",
250 G_TYPE_SOCKET, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
251 g_object_class_install_property (gobject_class, PROP_AUTO_MULTICAST,
252 g_param_spec_boolean ("auto-multicast", "Auto Multicast",
253 "Automatically join/leave multicast groups",
254 UDP_DEFAULT_AUTO_MULTICAST,
255 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
256 g_object_class_install_property (gobject_class, PROP_REUSE,
257 g_param_spec_boolean ("reuse", "Reuse", "Enable reuse of the port",
258 UDP_DEFAULT_REUSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
260 gst_element_class_add_pad_template (gstelement_class,
261 gst_static_pad_template_get (&src_template));
263 gst_element_class_set_details_simple (gstelement_class, "UDP packet receiver",
265 "Receive data over the network via UDP",
266 "Wim Taymans <wim@fluendo.com>, "
267 "Thijs Vermeir <thijs.vermeir@barco.com>");
269 gstbasesrc_class->start = gst_udpsrc_start;
270 gstbasesrc_class->stop = gst_udpsrc_stop;
271 gstbasesrc_class->unlock = gst_udpsrc_unlock;
272 gstbasesrc_class->unlock_stop = gst_udpsrc_unlock_stop;
273 gstbasesrc_class->get_caps = gst_udpsrc_getcaps;
275 gstpushsrc_class->create = gst_udpsrc_create;
279 gst_udpsrc_init (GstUDPSrc * udpsrc)
281 WSA_STARTUP (udpsrc);
284 g_strdup_printf ("udp://%s:%u", UDP_DEFAULT_MULTICAST_GROUP,
287 udpsrc->host = g_strdup (UDP_DEFAULT_MULTICAST_GROUP);
288 udpsrc->port = UDP_DEFAULT_PORT;
289 udpsrc->socket = UDP_DEFAULT_SOCKET;
290 udpsrc->multi_iface = g_strdup (UDP_DEFAULT_MULTICAST_IFACE);
291 udpsrc->buffer_size = UDP_DEFAULT_BUFFER_SIZE;
292 udpsrc->timeout = UDP_DEFAULT_TIMEOUT;
293 udpsrc->skip_first_bytes = UDP_DEFAULT_SKIP_FIRST_BYTES;
294 udpsrc->close_socket = UDP_DEFAULT_CLOSE_SOCKET;
295 udpsrc->external_socket = (udpsrc->socket != NULL);
296 udpsrc->auto_multicast = UDP_DEFAULT_AUTO_MULTICAST;
297 udpsrc->used_socket = UDP_DEFAULT_USED_SOCKET;
298 udpsrc->reuse = UDP_DEFAULT_REUSE;
300 udpsrc->cancellable = g_cancellable_new ();
302 /* configure basesrc to be a live source */
303 gst_base_src_set_live (GST_BASE_SRC (udpsrc), TRUE);
304 /* make basesrc output a segment in time */
305 gst_base_src_set_format (GST_BASE_SRC (udpsrc), GST_FORMAT_TIME);
306 /* make basesrc set timestamps on outgoing buffers based on the running_time
307 * when they were captured */
308 gst_base_src_set_do_timestamp (GST_BASE_SRC (udpsrc), TRUE);
312 gst_udpsrc_finalize (GObject * object)
316 udpsrc = GST_UDPSRC (object);
319 gst_caps_unref (udpsrc->caps);
322 g_free (udpsrc->multi_iface);
323 udpsrc->multi_iface = NULL;
325 g_free (udpsrc->uri);
329 g_object_unref (udpsrc->socket);
330 udpsrc->socket = NULL;
332 if (udpsrc->used_socket)
333 g_object_unref (udpsrc->used_socket);
334 udpsrc->used_socket = NULL;
336 if (udpsrc->cancellable)
337 g_object_unref (udpsrc->cancellable);
338 udpsrc->cancellable = NULL;
340 G_OBJECT_CLASS (parent_class)->finalize (object);
344 gst_udpsrc_getcaps (GstBaseSrc * src, GstCaps * filter)
348 udpsrc = GST_UDPSRC (src);
351 return (filter) ? gst_caps_intersect_full (filter, udpsrc->caps,
352 GST_CAPS_INTERSECT_FIRST) : gst_caps_ref (udpsrc->caps);
354 return (filter) ? gst_caps_ref (filter) : gst_caps_new_any ();
359 gst_udpsrc_create (GstPushSrc * psrc, GstBuffer ** buf)
363 GSocketAddress *saddr = NULL;
372 udpsrc = GST_UDPSRC_CAST (psrc);
375 /* quick check, avoid going in select when we already have data */
376 readsize = g_socket_get_available_bytes (udpsrc->used_socket);
383 GST_LOG_OBJECT (udpsrc, "doing select, timeout %" G_GUINT64_FORMAT,
386 if (!g_socket_condition_wait (udpsrc->used_socket, G_IO_IN | G_IO_PRI,
387 udpsrc->cancellable, &err)) {
388 if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_BUSY)
389 || g_error_matches (err, G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
391 } else if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_TIMED_OUT)) {
392 /* timeout, post element message */
393 gst_element_post_message (GST_ELEMENT_CAST (udpsrc),
394 gst_message_new_element (GST_OBJECT_CAST (udpsrc),
395 gst_structure_new ("GstUDPSrcTimeout",
396 "timeout", G_TYPE_UINT64, udpsrc->timeout, NULL)));
403 } while (G_UNLIKELY (try_again));
405 /* ask how much is available for reading on the socket, this should be exactly
406 * one UDP packet. We will check the return value, though, because in some
407 * case it can return 0 and we don't want a 0 sized buffer. */
408 readsize = g_socket_get_available_bytes (udpsrc->used_socket);
409 if (G_UNLIKELY (readsize < 0))
410 goto get_available_error;
412 /* If we get here and the readsize is zero, then either select was woken up
413 * by activity that is not a read, or a poll error occurred, or a UDP packet
414 * was received that has no data. Since we cannot identify which case it is,
415 * we handle all of them. This could possibly lead to a UDP packet getting
416 * lost, but since UDP is not reliable, we can accept this. */
417 if (G_UNLIKELY (!readsize)) {
418 /* try to read a packet (and it will be ignored),
419 * in case a packet with no data arrived */
424 g_socket_receive_from (udpsrc->used_socket, NULL, (gchar *) pktdata,
425 pktsize, udpsrc->cancellable, &err);
426 if (G_UNLIKELY (ret < 0))
434 GST_LOG_OBJECT (udpsrc, "ioctl says %d bytes available", (int) readsize);
436 pktdata = g_malloc (readsize);
441 g_object_unref (saddr);
445 g_socket_receive_from (udpsrc->used_socket, &saddr, (gchar *) pktdata,
446 pktsize, udpsrc->cancellable, &err);
448 if (G_UNLIKELY (ret < 0))
451 /* patch pktdata and len when stripping off the headers */
452 if (G_UNLIKELY (udpsrc->skip_first_bytes != 0)) {
453 if (G_UNLIKELY (readsize < udpsrc->skip_first_bytes))
456 offset += udpsrc->skip_first_bytes;
457 ret -= udpsrc->skip_first_bytes;
460 outbuf = gst_buffer_new ();
461 gst_buffer_take_memory (outbuf, -1,
462 gst_memory_new_wrapped (0, pktdata, g_free, pktsize, offset, ret));
464 /* use buffer metadata so receivers can also track the address */
466 gst_buffer_add_net_address_meta (outbuf, saddr);
467 g_object_unref (saddr);
471 GST_LOG_OBJECT (udpsrc, "read %d bytes", (int) readsize);
473 *buf = GST_BUFFER_CAST (outbuf);
480 GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
481 ("select error: %s", err->message));
482 g_clear_error (&err);
483 return GST_FLOW_ERROR;
487 GST_DEBUG ("stop called");
488 return GST_FLOW_WRONG_STATE;
492 GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
493 ("get available bytes failed"));
494 return GST_FLOW_ERROR;
500 if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_BUSY) ||
501 g_error_matches (err, G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
502 g_clear_error (&err);
503 return GST_FLOW_WRONG_STATE;
505 GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
506 ("receive error %d: %s", ret, err->message));
507 g_clear_error (&err);
508 return GST_FLOW_ERROR;
513 GST_ELEMENT_ERROR (udpsrc, STREAM, DECODE, (NULL),
514 ("UDP buffer to small to skip header"));
515 return GST_FLOW_ERROR;
520 gst_udpsrc_set_uri (GstUDPSrc * src, const gchar * uri, GError ** error)
525 if (!gst_udp_parse_uri (uri, &host, &port))
529 port = UDP_DEFAULT_PORT;
536 src->uri = g_strdup (uri);
543 GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
544 ("error parsing uri %s", uri));
545 g_set_error_literal (error, GST_URI_ERROR, GST_URI_ERROR_BAD_URI,
546 "Could not parse UDP URI");
552 gst_udpsrc_set_property (GObject * object, guint prop_id, const GValue * value,
555 GstUDPSrc *udpsrc = GST_UDPSRC (object);
558 case PROP_BUFFER_SIZE:
559 udpsrc->buffer_size = g_value_get_int (value);
562 udpsrc->port = g_value_get_int (value);
563 g_free (udpsrc->uri);
564 udpsrc->uri = g_strdup_printf ("udp://%s:%u", udpsrc->host, udpsrc->port);
566 case PROP_MULTICAST_GROUP:
570 g_free (udpsrc->host);
571 if ((group = g_value_get_string (value)))
572 udpsrc->host = g_strdup (group);
574 udpsrc->host = g_strdup (UDP_DEFAULT_MULTICAST_GROUP);
576 g_free (udpsrc->uri);
577 udpsrc->uri = g_strdup_printf ("udp://%s:%u", udpsrc->host, udpsrc->port);
580 case PROP_MULTICAST_IFACE:
581 g_free (udpsrc->multi_iface);
583 if (g_value_get_string (value) == NULL)
584 udpsrc->multi_iface = g_strdup (UDP_DEFAULT_MULTICAST_IFACE);
586 udpsrc->multi_iface = g_value_dup_string (value);
589 gst_udpsrc_set_uri (udpsrc, g_value_get_string (value), NULL);
593 const GstCaps *new_caps_val = gst_value_get_caps (value);
599 if (new_caps_val == NULL) {
600 new_caps = gst_caps_new_any ();
602 new_caps = gst_caps_copy (new_caps_val);
605 old_caps = udpsrc->caps;
606 udpsrc->caps = new_caps;
608 gst_caps_unref (old_caps);
609 gst_pad_set_caps (GST_BASE_SRC (udpsrc)->srcpad, new_caps);
613 if (udpsrc->socket != NULL && udpsrc->socket != udpsrc->used_socket &&
614 udpsrc->close_socket) {
617 if (!g_socket_close (udpsrc->socket, &err)) {
618 GST_ERROR ("failed to close socket %p: %s", udpsrc->socket,
620 g_clear_error (&err);
624 g_object_unref (udpsrc->socket);
625 udpsrc->socket = g_value_dup_object (value);
626 GST_DEBUG ("setting socket to %p", udpsrc->socket);
629 udpsrc->timeout = g_value_get_uint64 (value);
631 case PROP_SKIP_FIRST_BYTES:
632 udpsrc->skip_first_bytes = g_value_get_int (value);
634 case PROP_CLOSE_SOCKET:
635 udpsrc->close_socket = g_value_get_boolean (value);
637 case PROP_AUTO_MULTICAST:
638 udpsrc->auto_multicast = g_value_get_boolean (value);
641 udpsrc->reuse = g_value_get_boolean (value);
649 gst_udpsrc_get_property (GObject * object, guint prop_id, GValue * value,
652 GstUDPSrc *udpsrc = GST_UDPSRC (object);
655 case PROP_BUFFER_SIZE:
656 g_value_set_int (value, udpsrc->buffer_size);
659 g_value_set_int (value, udpsrc->port);
661 case PROP_MULTICAST_GROUP:
662 g_value_set_string (value, udpsrc->host);
664 case PROP_MULTICAST_IFACE:
665 g_value_set_string (value, udpsrc->multi_iface);
668 g_value_take_string (value, udpsrc->uri);
671 gst_value_set_caps (value, udpsrc->caps);
674 g_value_set_object (value, udpsrc->socket);
677 g_value_set_uint64 (value, udpsrc->timeout);
679 case PROP_SKIP_FIRST_BYTES:
680 g_value_set_int (value, udpsrc->skip_first_bytes);
682 case PROP_CLOSE_SOCKET:
683 g_value_set_boolean (value, udpsrc->close_socket);
685 case PROP_USED_SOCKET:
686 g_value_set_object (value, udpsrc->used_socket);
688 case PROP_AUTO_MULTICAST:
689 g_value_set_boolean (value, udpsrc->auto_multicast);
692 g_value_set_boolean (value, udpsrc->reuse);
695 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
700 /* create a socket for sending to remote machine */
702 gst_udpsrc_start (GstBaseSrc * bsrc)
705 GInetAddress *addr, *bind_addr;
706 GSocketAddress *bind_saddr;
710 src = GST_UDPSRC (bsrc);
712 if (src->socket == NULL) {
713 /* need to allocate a socket */
714 GST_DEBUG_OBJECT (src, "allocating socket for %s:%d", src->host, src->port);
716 addr = g_inet_address_new_from_string (src->host);
720 resolver = g_resolver_get_default ();
722 g_resolver_lookup_by_name (resolver, src->host, src->cancellable,
726 addr = G_INET_ADDRESS (g_object_ref (results->data));
728 g_resolver_free_addresses (results);
729 g_object_unref (resolver);
731 #ifndef GST_DISABLE_GST_DEBUG
733 gchar *ip = g_inet_address_to_string (addr);
735 GST_DEBUG_OBJECT (src, "IP address for host %s is %s", src->host, ip);
740 if ((src->used_socket =
741 g_socket_new (g_inet_address_get_family (addr),
742 G_SOCKET_TYPE_DATAGRAM, G_SOCKET_PROTOCOL_UDP, &err)) == NULL)
745 src->external_socket = FALSE;
747 GST_DEBUG_OBJECT (src, "got socket %p", src->used_socket);
750 g_object_unref (src->addr);
752 G_INET_SOCKET_ADDRESS (g_inet_socket_address_new (addr, src->port));
754 GST_DEBUG_OBJECT (src, "binding on port %d", src->port);
756 if (g_inet_address_get_is_multicast (addr))
757 bind_addr = g_inet_address_new_any (g_inet_address_get_family (addr));
759 bind_addr = G_INET_ADDRESS (g_object_ref (addr));
761 g_object_unref (addr);
763 bind_saddr = g_inet_socket_address_new (bind_addr, src->port);
764 g_object_unref (bind_addr);
765 if (!g_socket_bind (src->used_socket, bind_saddr, src->reuse, &err))
768 g_object_unref (bind_saddr);
770 GST_DEBUG_OBJECT (src, "using provided socket %d", src->socket);
771 /* we use the configured socket, try to get some info about it */
772 src->used_socket = G_SOCKET (g_object_ref (src->socket));
773 src->external_socket = TRUE;
776 g_object_unref (src->addr);
778 G_INET_SOCKET_ADDRESS (g_socket_get_local_address (src->used_socket,
781 goto getsockname_error;
785 g_socket_set_timeout (src->used_socket, src->timeout / GST_SECOND);
791 len = sizeof (rcvsize);
792 if (src->buffer_size != 0) {
793 rcvsize = src->buffer_size;
795 GST_DEBUG_OBJECT (src, "setting udp buffer of %d bytes", rcvsize);
796 /* set buffer size, Note that on Linux this is typically limited to a
797 * maximum of around 100K. Also a minimum of 128 bytes is required on
800 setsockopt (g_socket_get_fd (src->used_socket), SOL_SOCKET, SO_RCVBUF,
801 (void *) &rcvsize, len);
803 GST_ELEMENT_WARNING (src, RESOURCE, SETTINGS, (NULL),
804 ("Could not create a buffer of requested %d bytes, %d: %s (%d)",
805 rcvsize, ret, g_strerror (errno), errno));
809 /* read the value of the receive buffer. Note that on linux this returns 2x the
810 * value we set because the kernel allocates extra memory for metadata.
811 * The default on Linux is about 100K (which is about 50K without metadata) */
813 getsockopt (g_socket_get_fd (src->used_socket), SOL_SOCKET, SO_RCVBUF,
814 (void *) &rcvsize, &len);
816 GST_DEBUG_OBJECT (src, "have udp buffer of %d bytes", rcvsize);
818 GST_DEBUG_OBJECT (src, "could not get udp buffer size");
822 g_socket_set_broadcast (src->used_socket, TRUE);
824 if (src->auto_multicast
826 g_inet_address_get_is_multicast (g_inet_socket_address_get_address
828 GST_DEBUG_OBJECT (src, "joining multicast group %s", src->host);
829 if (!g_socket_join_multicast_group (src->used_socket,
830 g_inet_socket_address_get_address (src->addr),
831 FALSE, src->multi_iface, &err))
835 /* NOTE: sockaddr_in.sin_port works for ipv4 and ipv6 because sin_port
836 * follows ss_family on both */
838 GInetSocketAddress *addr;
842 G_INET_SOCKET_ADDRESS (g_socket_get_local_address (src->used_socket,
845 goto getsockname_error;
847 port = g_inet_socket_address_get_port (addr);
848 GST_DEBUG_OBJECT (src, "bound, on port %d", port);
849 if (port != src->port) {
851 GST_DEBUG_OBJECT (src, "notifying port %d", port);
852 g_object_notify (G_OBJECT (src), "port");
854 g_object_unref (addr);
862 GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
863 ("Name resolval failed: %s", err->message));
864 g_clear_error (&err);
865 g_object_unref (resolver);
870 GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
871 ("no socket error: %s", err->message));
872 g_clear_error (&err);
873 g_object_unref (addr);
878 gst_udpsrc_stop (GST_BASE_SRC (src));
879 GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
880 ("bind failed: %s", err->message));
881 g_clear_error (&err);
882 g_object_unref (bind_saddr);
887 gst_udpsrc_stop (GST_BASE_SRC (src));
888 GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
889 ("could add membership: %s", err->message));
890 g_clear_error (&err);
895 gst_udpsrc_stop (GST_BASE_SRC (src));
896 GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
897 ("getsockname failed: %s", err->message));
898 g_clear_error (&err);
904 gst_udpsrc_unlock (GstBaseSrc * bsrc)
908 src = GST_UDPSRC (bsrc);
910 GST_LOG_OBJECT (src, "Flushing");
911 g_cancellable_cancel (src->cancellable);
917 gst_udpsrc_unlock_stop (GstBaseSrc * bsrc)
921 src = GST_UDPSRC (bsrc);
923 GST_LOG_OBJECT (src, "No longer flushing");
924 g_cancellable_reset (src->cancellable);
930 gst_udpsrc_stop (GstBaseSrc * bsrc)
934 src = GST_UDPSRC (bsrc);
936 GST_DEBUG ("stopping, closing sockets");
938 if (src->used_socket) {
939 if (src->auto_multicast
941 g_inet_address_get_is_multicast (g_inet_socket_address_get_address
945 GST_DEBUG_OBJECT (src, "leaving multicast group %s", src->host);
947 if (!g_socket_leave_multicast_group (src->used_socket,
948 g_inet_socket_address_get_address (src->addr), FALSE,
949 src->multi_iface, NULL)) {
950 GST_ERROR_OBJECT (src, "Failed to leave multicast group: %s",
952 g_clear_error (&err);
956 if (src->close_socket || !src->external_socket) {
958 if (!g_socket_close (src->used_socket, &err)) {
959 GST_ERROR_OBJECT (src, "Failed to close socket: %s", err->message);
960 g_clear_error (&err);
964 g_object_unref (src->used_socket);
965 src->used_socket = NULL;
966 g_object_unref (src->addr);
973 /*** GSTURIHANDLER INTERFACE *************************************************/
976 gst_udpsrc_uri_get_type (GType type)
981 static const gchar *const *
982 gst_udpsrc_uri_get_protocols (GType type)
984 static const gchar *protocols[] = { "udp", NULL };
990 gst_udpsrc_uri_get_uri (GstURIHandler * handler)
992 GstUDPSrc *src = GST_UDPSRC (handler);
994 return g_strdup (src->uri);
998 gst_udpsrc_uri_set_uri (GstURIHandler * handler, const gchar * uri,
1001 return gst_udpsrc_set_uri (GST_UDPSRC (handler), uri, error);
1005 gst_udpsrc_uri_handler_init (gpointer g_iface, gpointer iface_data)
1007 GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
1009 iface->get_type = gst_udpsrc_uri_get_type;
1010 iface->get_protocols = gst_udpsrc_uri_get_protocols;
1011 iface->get_uri = gst_udpsrc_uri_get_uri;
1012 iface->set_uri = gst_udpsrc_uri_set_uri;