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., 51 Franklin St, Fifth Floor,
20 * Boston, MA 02110-1301, 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-1.0 -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-1.0 -v audiotestsrc ! udpsink
101 * gst-launch-1.0 -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>
115 #ifdef HAVE_SYS_SOCKET_H
116 #include <sys/socket.h>
119 GST_DEBUG_CATEGORY_STATIC (udpsrc_debug);
120 #define GST_CAT_DEFAULT (udpsrc_debug)
122 static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
125 GST_STATIC_CAPS_ANY);
127 #define UDP_DEFAULT_PORT 5004
128 #define UDP_DEFAULT_MULTICAST_GROUP "0.0.0.0"
129 #define UDP_DEFAULT_MULTICAST_IFACE NULL
130 #define UDP_DEFAULT_URI "udp://"UDP_DEFAULT_MULTICAST_GROUP":"G_STRINGIFY(UDP_DEFAULT_PORT)
131 #define UDP_DEFAULT_CAPS NULL
132 #define UDP_DEFAULT_SOCKET NULL
133 #define UDP_DEFAULT_BUFFER_SIZE 0
134 #define UDP_DEFAULT_TIMEOUT 0
135 #define UDP_DEFAULT_SKIP_FIRST_BYTES 0
136 #define UDP_DEFAULT_CLOSE_SOCKET TRUE
137 #define UDP_DEFAULT_USED_SOCKET NULL
138 #define UDP_DEFAULT_AUTO_MULTICAST TRUE
139 #define UDP_DEFAULT_REUSE TRUE
146 PROP_MULTICAST_GROUP,
147 PROP_MULTICAST_IFACE,
153 PROP_SKIP_FIRST_BYTES,
162 static void gst_udpsrc_uri_handler_init (gpointer g_iface, gpointer iface_data);
164 static GstCaps *gst_udpsrc_getcaps (GstBaseSrc * src, GstCaps * filter);
166 static GstFlowReturn gst_udpsrc_create (GstPushSrc * psrc, GstBuffer ** buf);
168 static gboolean gst_udpsrc_start (GstBaseSrc * bsrc);
170 static gboolean gst_udpsrc_stop (GstBaseSrc * bsrc);
172 static gboolean gst_udpsrc_unlock (GstBaseSrc * bsrc);
174 static gboolean gst_udpsrc_unlock_stop (GstBaseSrc * bsrc);
176 static void gst_udpsrc_finalize (GObject * object);
178 static void gst_udpsrc_set_property (GObject * object, guint prop_id,
179 const GValue * value, GParamSpec * pspec);
180 static void gst_udpsrc_get_property (GObject * object, guint prop_id,
181 GValue * value, GParamSpec * pspec);
183 #define gst_udpsrc_parent_class parent_class
184 G_DEFINE_TYPE_WITH_CODE (GstUDPSrc, gst_udpsrc, GST_TYPE_PUSH_SRC,
185 G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER, gst_udpsrc_uri_handler_init));
188 gst_udpsrc_class_init (GstUDPSrcClass * klass)
190 GObjectClass *gobject_class;
191 GstElementClass *gstelement_class;
192 GstBaseSrcClass *gstbasesrc_class;
193 GstPushSrcClass *gstpushsrc_class;
195 gobject_class = (GObjectClass *) klass;
196 gstelement_class = (GstElementClass *) klass;
197 gstbasesrc_class = (GstBaseSrcClass *) klass;
198 gstpushsrc_class = (GstPushSrcClass *) klass;
200 GST_DEBUG_CATEGORY_INIT (udpsrc_debug, "udpsrc", 0, "UDP src");
202 gobject_class->set_property = gst_udpsrc_set_property;
203 gobject_class->get_property = gst_udpsrc_get_property;
204 gobject_class->finalize = gst_udpsrc_finalize;
206 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PORT,
207 g_param_spec_int ("port", "Port",
208 "The port to receive the packets from, 0=allocate", 0, G_MAXUINT16,
209 UDP_DEFAULT_PORT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
210 g_object_class_install_property (gobject_class, PROP_MULTICAST_GROUP,
211 g_param_spec_string ("multicast-group", "Multicast Group",
212 "The Address of multicast group to join", UDP_DEFAULT_MULTICAST_GROUP,
213 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
214 g_object_class_install_property (gobject_class, PROP_MULTICAST_IFACE,
215 g_param_spec_string ("multicast-iface", "Multicast Interface",
216 "The network interface on which to join the multicast group",
217 UDP_DEFAULT_MULTICAST_IFACE,
218 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
219 g_object_class_install_property (gobject_class, PROP_URI,
220 g_param_spec_string ("uri", "URI",
221 "URI in the form of udp://multicast_group:port", UDP_DEFAULT_URI,
222 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
223 g_object_class_install_property (gobject_class, PROP_CAPS,
224 g_param_spec_boxed ("caps", "Caps",
225 "The caps of the source pad", GST_TYPE_CAPS,
226 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
227 g_object_class_install_property (gobject_class, PROP_SOCKET,
228 g_param_spec_object ("socket", "Socket",
229 "Socket to use for UDP reception. (NULL == allocate)",
230 G_TYPE_SOCKET, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
231 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BUFFER_SIZE,
232 g_param_spec_int ("buffer-size", "Buffer Size",
233 "Size of the kernel receive buffer in bytes, 0=default", 0, G_MAXINT,
234 UDP_DEFAULT_BUFFER_SIZE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
235 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TIMEOUT,
236 g_param_spec_uint64 ("timeout", "Timeout",
237 "Post a message after timeout nanoseconds (0 = disabled)", 0,
238 G_MAXUINT64, UDP_DEFAULT_TIMEOUT,
239 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
240 g_object_class_install_property (G_OBJECT_CLASS (klass),
241 PROP_SKIP_FIRST_BYTES, g_param_spec_int ("skip-first-bytes",
242 "Skip first bytes", "number of bytes to skip for each udp packet", 0,
243 G_MAXINT, UDP_DEFAULT_SKIP_FIRST_BYTES,
244 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
245 g_object_class_install_property (gobject_class, PROP_CLOSE_SOCKET,
246 g_param_spec_boolean ("close-socket", "Close socket",
247 "Close socket if passed as property on state change",
248 UDP_DEFAULT_CLOSE_SOCKET,
249 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
250 g_object_class_install_property (gobject_class, PROP_USED_SOCKET,
251 g_param_spec_object ("used-socket", "Socket Handle",
252 "Socket currently in use for UDP reception. (NULL = no socket)",
253 G_TYPE_SOCKET, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
254 g_object_class_install_property (gobject_class, PROP_AUTO_MULTICAST,
255 g_param_spec_boolean ("auto-multicast", "Auto Multicast",
256 "Automatically join/leave multicast groups",
257 UDP_DEFAULT_AUTO_MULTICAST,
258 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
259 g_object_class_install_property (gobject_class, PROP_REUSE,
260 g_param_spec_boolean ("reuse", "Reuse", "Enable reuse of the port",
261 UDP_DEFAULT_REUSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
263 gst_element_class_add_pad_template (gstelement_class,
264 gst_static_pad_template_get (&src_template));
266 gst_element_class_set_static_metadata (gstelement_class,
267 "UDP packet receiver", "Source/Network",
268 "Receive data over the network via UDP",
269 "Wim Taymans <wim@fluendo.com>, "
270 "Thijs Vermeir <thijs.vermeir@barco.com>");
272 gstbasesrc_class->start = gst_udpsrc_start;
273 gstbasesrc_class->stop = gst_udpsrc_stop;
274 gstbasesrc_class->unlock = gst_udpsrc_unlock;
275 gstbasesrc_class->unlock_stop = gst_udpsrc_unlock_stop;
276 gstbasesrc_class->get_caps = gst_udpsrc_getcaps;
278 gstpushsrc_class->create = gst_udpsrc_create;
282 gst_udpsrc_init (GstUDPSrc * udpsrc)
285 g_strdup_printf ("udp://%s:%u", UDP_DEFAULT_MULTICAST_GROUP,
288 udpsrc->host = g_strdup (UDP_DEFAULT_MULTICAST_GROUP);
289 udpsrc->port = UDP_DEFAULT_PORT;
290 udpsrc->socket = UDP_DEFAULT_SOCKET;
291 udpsrc->multi_iface = g_strdup (UDP_DEFAULT_MULTICAST_IFACE);
292 udpsrc->buffer_size = UDP_DEFAULT_BUFFER_SIZE;
293 udpsrc->timeout = UDP_DEFAULT_TIMEOUT;
294 udpsrc->skip_first_bytes = UDP_DEFAULT_SKIP_FIRST_BYTES;
295 udpsrc->close_socket = UDP_DEFAULT_CLOSE_SOCKET;
296 udpsrc->external_socket = (udpsrc->socket != NULL);
297 udpsrc->auto_multicast = UDP_DEFAULT_AUTO_MULTICAST;
298 udpsrc->used_socket = UDP_DEFAULT_USED_SOCKET;
299 udpsrc->reuse = UDP_DEFAULT_REUSE;
301 udpsrc->cancellable = g_cancellable_new ();
303 /* configure basesrc to be a live source */
304 gst_base_src_set_live (GST_BASE_SRC (udpsrc), TRUE);
305 /* make basesrc output a segment in time */
306 gst_base_src_set_format (GST_BASE_SRC (udpsrc), GST_FORMAT_TIME);
307 /* make basesrc set timestamps on outgoing buffers based on the running_time
308 * when they were captured */
309 gst_base_src_set_do_timestamp (GST_BASE_SRC (udpsrc), TRUE);
313 gst_udpsrc_finalize (GObject * object)
317 udpsrc = GST_UDPSRC (object);
320 gst_caps_unref (udpsrc->caps);
323 g_free (udpsrc->multi_iface);
324 udpsrc->multi_iface = NULL;
326 g_free (udpsrc->uri);
329 g_free (udpsrc->host);
333 g_object_unref (udpsrc->socket);
334 udpsrc->socket = NULL;
336 if (udpsrc->used_socket)
337 g_object_unref (udpsrc->used_socket);
338 udpsrc->used_socket = NULL;
340 if (udpsrc->cancellable)
341 g_object_unref (udpsrc->cancellable);
342 udpsrc->cancellable = NULL;
344 G_OBJECT_CLASS (parent_class)->finalize (object);
348 gst_udpsrc_getcaps (GstBaseSrc * src, GstCaps * filter)
352 udpsrc = GST_UDPSRC (src);
355 return (filter) ? gst_caps_intersect_full (filter, udpsrc->caps,
356 GST_CAPS_INTERSECT_FIRST) : gst_caps_ref (udpsrc->caps);
358 return (filter) ? gst_caps_ref (filter) : gst_caps_new_any ();
363 gst_udpsrc_create (GstPushSrc * psrc, GstBuffer ** buf)
369 GSocketAddress *saddr = NULL;
376 udpsrc = GST_UDPSRC_CAST (psrc);
379 /* quick check, avoid going in select when we already have data */
380 readsize = g_socket_get_available_bytes (udpsrc->used_socket);
390 timeout = udpsrc->timeout / 1000;
394 GST_LOG_OBJECT (udpsrc, "doing select, timeout %" G_GUINT64_FORMAT,
397 if (!g_socket_condition_timed_wait (udpsrc->used_socket, G_IO_IN | G_IO_PRI,
398 timeout, udpsrc->cancellable, &err)) {
399 if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_BUSY)
400 || g_error_matches (err, G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
402 } else if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_TIMED_OUT)) {
403 g_clear_error (&err);
404 /* timeout, post element message */
405 gst_element_post_message (GST_ELEMENT_CAST (udpsrc),
406 gst_message_new_element (GST_OBJECT_CAST (udpsrc),
407 gst_structure_new ("GstUDPSrcTimeout",
408 "timeout", G_TYPE_UINT64, udpsrc->timeout, NULL)));
415 } while (G_UNLIKELY (try_again));
417 /* ask how much is available for reading on the socket, this should be exactly
418 * one UDP packet. We will check the return value, though, because in some
419 * case it can return 0 and we don't want a 0 sized buffer. */
420 readsize = g_socket_get_available_bytes (udpsrc->used_socket);
421 if (G_UNLIKELY (readsize < 0))
422 goto get_available_error;
424 /* If we get here and the readsize is zero, then either select was woken up
425 * by activity that is not a read, or a poll error occurred, or a UDP packet
426 * was received that has no data. Since we cannot identify which case it is,
427 * we handle all of them. This could possibly lead to a UDP packet getting
428 * lost, but since UDP is not reliable, we can accept this. */
429 if (G_UNLIKELY (!readsize)) {
430 /* try to read a packet (and it will be ignored),
431 * in case a packet with no data arrived */
433 g_socket_receive_from (udpsrc->used_socket, NULL, NULL,
434 0, udpsrc->cancellable, &err);
435 if (G_UNLIKELY (res < 0))
443 GST_LOG_OBJECT (udpsrc, "ioctl says %d bytes available", (int) readsize);
445 ret = GST_BASE_SRC_CLASS (parent_class)->alloc (GST_BASE_SRC_CAST (udpsrc),
446 -1, readsize, &outbuf);
447 if (ret != GST_FLOW_OK)
450 gst_buffer_map (outbuf, &info, GST_MAP_WRITE);
454 g_object_unref (saddr);
458 g_socket_receive_from (udpsrc->used_socket, &saddr, (gchar *) info.data,
459 info.size, udpsrc->cancellable, &err);
461 if (G_UNLIKELY (res < 0)) {
462 /* EHOSTUNREACH for a UDP socket means that a packet sent with udpsink
463 * generated a "port unreachable" ICMP response. We ignore that and try
465 if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_HOST_UNREACHABLE)) {
466 gst_buffer_unmap (outbuf, &info);
467 gst_buffer_unref (outbuf);
469 g_clear_error (&err);
475 /* patch offset and size when stripping off the headers */
476 if (G_UNLIKELY (udpsrc->skip_first_bytes != 0)) {
477 if (G_UNLIKELY (readsize < udpsrc->skip_first_bytes))
480 offset += udpsrc->skip_first_bytes;
481 res -= udpsrc->skip_first_bytes;
484 gst_buffer_unmap (outbuf, &info);
485 gst_buffer_resize (outbuf, offset, res);
487 /* use buffer metadata so receivers can also track the address */
489 gst_buffer_add_net_address_meta (outbuf, saddr);
490 g_object_unref (saddr);
494 GST_LOG_OBJECT (udpsrc, "read %d bytes", (int) readsize);
496 *buf = GST_BUFFER_CAST (outbuf);
503 GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
504 ("select error: %s", err->message));
505 g_clear_error (&err);
506 return GST_FLOW_ERROR;
510 GST_DEBUG ("stop called");
511 g_clear_error (&err);
512 return GST_FLOW_FLUSHING;
516 GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
517 ("get available bytes failed"));
518 return GST_FLOW_ERROR;
522 GST_DEBUG ("Allocation failed");
527 gst_buffer_unmap (outbuf, &info);
528 gst_buffer_unref (outbuf);
530 if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_BUSY) ||
531 g_error_matches (err, G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
532 g_clear_error (&err);
533 return GST_FLOW_FLUSHING;
535 GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
536 ("receive error %" G_GSSIZE_FORMAT ": %s", res, err->message));
537 g_clear_error (&err);
538 return GST_FLOW_ERROR;
543 gst_buffer_unmap (outbuf, &info);
544 gst_buffer_unref (outbuf);
546 GST_ELEMENT_ERROR (udpsrc, STREAM, DECODE, (NULL),
547 ("UDP buffer to small to skip header"));
548 return GST_FLOW_ERROR;
553 gst_udpsrc_set_uri (GstUDPSrc * src, const gchar * uri, GError ** error)
558 if (!gst_udp_parse_uri (uri, &host, &port))
561 if (port == (guint16) - 1)
562 port = UDP_DEFAULT_PORT;
569 src->uri = g_strdup (uri);
576 GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
577 ("error parsing uri %s", uri));
578 g_set_error_literal (error, GST_URI_ERROR, GST_URI_ERROR_BAD_URI,
579 "Could not parse UDP URI");
585 gst_udpsrc_set_property (GObject * object, guint prop_id, const GValue * value,
588 GstUDPSrc *udpsrc = GST_UDPSRC (object);
591 case PROP_BUFFER_SIZE:
592 udpsrc->buffer_size = g_value_get_int (value);
595 udpsrc->port = g_value_get_int (value);
596 g_free (udpsrc->uri);
597 udpsrc->uri = g_strdup_printf ("udp://%s:%u", udpsrc->host, udpsrc->port);
599 case PROP_MULTICAST_GROUP:
603 g_free (udpsrc->host);
604 if ((group = g_value_get_string (value)))
605 udpsrc->host = g_strdup (group);
607 udpsrc->host = g_strdup (UDP_DEFAULT_MULTICAST_GROUP);
609 g_free (udpsrc->uri);
610 udpsrc->uri = g_strdup_printf ("udp://%s:%u", udpsrc->host, udpsrc->port);
613 case PROP_MULTICAST_IFACE:
614 g_free (udpsrc->multi_iface);
616 if (g_value_get_string (value) == NULL)
617 udpsrc->multi_iface = g_strdup (UDP_DEFAULT_MULTICAST_IFACE);
619 udpsrc->multi_iface = g_value_dup_string (value);
622 gst_udpsrc_set_uri (udpsrc, g_value_get_string (value), NULL);
626 const GstCaps *new_caps_val = gst_value_get_caps (value);
632 if (new_caps_val == NULL) {
633 new_caps = gst_caps_new_any ();
635 new_caps = gst_caps_copy (new_caps_val);
638 old_caps = udpsrc->caps;
639 udpsrc->caps = new_caps;
641 gst_caps_unref (old_caps);
642 gst_pad_set_caps (GST_BASE_SRC (udpsrc)->srcpad, new_caps);
646 if (udpsrc->socket != NULL && udpsrc->socket != udpsrc->used_socket &&
647 udpsrc->close_socket) {
650 if (!g_socket_close (udpsrc->socket, &err)) {
651 GST_ERROR ("failed to close socket %p: %s", udpsrc->socket,
653 g_clear_error (&err);
657 g_object_unref (udpsrc->socket);
658 udpsrc->socket = g_value_dup_object (value);
659 GST_DEBUG ("setting socket to %p", udpsrc->socket);
662 udpsrc->timeout = g_value_get_uint64 (value);
664 case PROP_SKIP_FIRST_BYTES:
665 udpsrc->skip_first_bytes = g_value_get_int (value);
667 case PROP_CLOSE_SOCKET:
668 udpsrc->close_socket = g_value_get_boolean (value);
670 case PROP_AUTO_MULTICAST:
671 udpsrc->auto_multicast = g_value_get_boolean (value);
674 udpsrc->reuse = g_value_get_boolean (value);
682 gst_udpsrc_get_property (GObject * object, guint prop_id, GValue * value,
685 GstUDPSrc *udpsrc = GST_UDPSRC (object);
688 case PROP_BUFFER_SIZE:
689 g_value_set_int (value, udpsrc->buffer_size);
692 g_value_set_int (value, udpsrc->port);
694 case PROP_MULTICAST_GROUP:
695 g_value_set_string (value, udpsrc->host);
697 case PROP_MULTICAST_IFACE:
698 g_value_set_string (value, udpsrc->multi_iface);
701 g_value_set_string (value, udpsrc->uri);
704 gst_value_set_caps (value, udpsrc->caps);
707 g_value_set_object (value, udpsrc->socket);
710 g_value_set_uint64 (value, udpsrc->timeout);
712 case PROP_SKIP_FIRST_BYTES:
713 g_value_set_int (value, udpsrc->skip_first_bytes);
715 case PROP_CLOSE_SOCKET:
716 g_value_set_boolean (value, udpsrc->close_socket);
718 case PROP_USED_SOCKET:
719 g_value_set_object (value, udpsrc->used_socket);
721 case PROP_AUTO_MULTICAST:
722 g_value_set_boolean (value, udpsrc->auto_multicast);
725 g_value_set_boolean (value, udpsrc->reuse);
728 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
733 /* create a socket for sending to remote machine */
735 gst_udpsrc_start (GstBaseSrc * bsrc)
738 GInetAddress *addr, *bind_addr;
739 GSocketAddress *bind_saddr;
743 src = GST_UDPSRC (bsrc);
745 if (src->socket == NULL) {
746 /* need to allocate a socket */
747 GST_DEBUG_OBJECT (src, "allocating socket for %s:%d", src->host, src->port);
749 addr = g_inet_address_new_from_string (src->host);
753 GST_DEBUG_OBJECT (src, "resolving IP address for host %s", src->host);
754 resolver = g_resolver_get_default ();
756 g_resolver_lookup_by_name (resolver, src->host, src->cancellable,
760 addr = G_INET_ADDRESS (g_object_ref (results->data));
762 g_resolver_free_addresses (results);
763 g_object_unref (resolver);
765 #ifndef GST_DISABLE_GST_DEBUG
767 gchar *ip = g_inet_address_to_string (addr);
769 GST_DEBUG_OBJECT (src, "IP address for host %s is %s", src->host, ip);
774 if ((src->used_socket =
775 g_socket_new (g_inet_address_get_family (addr),
776 G_SOCKET_TYPE_DATAGRAM, G_SOCKET_PROTOCOL_UDP, &err)) == NULL)
779 src->external_socket = FALSE;
781 GST_DEBUG_OBJECT (src, "got socket %p", src->used_socket);
784 g_object_unref (src->addr);
786 G_INET_SOCKET_ADDRESS (g_inet_socket_address_new (addr, src->port));
788 GST_DEBUG_OBJECT (src, "binding on port %d", src->port);
790 if (g_inet_address_get_is_multicast (addr))
791 bind_addr = g_inet_address_new_any (g_inet_address_get_family (addr));
793 bind_addr = G_INET_ADDRESS (g_object_ref (addr));
795 g_object_unref (addr);
797 bind_saddr = g_inet_socket_address_new (bind_addr, src->port);
798 g_object_unref (bind_addr);
799 if (!g_socket_bind (src->used_socket, bind_saddr, src->reuse, &err))
802 g_object_unref (bind_saddr);
804 GST_DEBUG_OBJECT (src, "using provided socket %p", src->socket);
805 /* we use the configured socket, try to get some info about it */
806 src->used_socket = G_SOCKET (g_object_ref (src->socket));
807 src->external_socket = TRUE;
810 g_object_unref (src->addr);
812 G_INET_SOCKET_ADDRESS (g_socket_get_local_address (src->used_socket,
815 goto getsockname_error;
823 len = sizeof (rcvsize);
824 if (src->buffer_size != 0) {
825 rcvsize = src->buffer_size;
827 GST_DEBUG_OBJECT (src, "setting udp buffer of %d bytes", rcvsize);
828 /* set buffer size, Note that on Linux this is typically limited to a
829 * maximum of around 100K. Also a minimum of 128 bytes is required on
832 setsockopt (g_socket_get_fd (src->used_socket), SOL_SOCKET, SO_RCVBUF,
833 (void *) &rcvsize, len);
835 GST_ELEMENT_WARNING (src, RESOURCE, SETTINGS, (NULL),
836 ("Could not create a buffer of requested %d bytes, %d: %s (%d)",
837 rcvsize, ret, g_strerror (errno), errno));
841 /* read the value of the receive buffer. Note that on linux this returns 2x the
842 * value we set because the kernel allocates extra memory for metadata.
843 * The default on Linux is about 100K (which is about 50K without metadata) */
845 getsockopt (g_socket_get_fd (src->used_socket), SOL_SOCKET, SO_RCVBUF,
846 (void *) &rcvsize, &len);
848 GST_DEBUG_OBJECT (src, "have udp buffer of %d bytes", rcvsize);
850 GST_DEBUG_OBJECT (src, "could not get udp buffer size");
854 g_socket_set_broadcast (src->used_socket, TRUE);
856 if (src->auto_multicast
858 g_inet_address_get_is_multicast (g_inet_socket_address_get_address
860 GST_DEBUG_OBJECT (src, "joining multicast group %s", src->host);
861 if (!g_socket_join_multicast_group (src->used_socket,
862 g_inet_socket_address_get_address (src->addr),
863 FALSE, src->multi_iface, &err))
867 /* NOTE: sockaddr_in.sin_port works for ipv4 and ipv6 because sin_port
868 * follows ss_family on both */
870 GInetSocketAddress *addr;
874 G_INET_SOCKET_ADDRESS (g_socket_get_local_address (src->used_socket,
877 goto getsockname_error;
879 port = g_inet_socket_address_get_port (addr);
880 GST_DEBUG_OBJECT (src, "bound, on port %d", port);
881 if (port != src->port) {
883 GST_DEBUG_OBJECT (src, "notifying port %d", port);
884 g_object_notify (G_OBJECT (src), "port");
886 g_object_unref (addr);
894 GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
895 ("Name resolval failed: %s", err->message));
896 g_clear_error (&err);
897 g_object_unref (resolver);
902 GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
903 ("no socket error: %s", err->message));
904 g_clear_error (&err);
905 g_object_unref (addr);
910 GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
911 ("bind failed: %s", err->message));
912 g_clear_error (&err);
913 g_object_unref (bind_saddr);
914 gst_udpsrc_stop (GST_BASE_SRC (src));
919 GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
920 ("could add membership: %s", err->message));
921 g_clear_error (&err);
922 gst_udpsrc_stop (GST_BASE_SRC (src));
927 GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
928 ("getsockname failed: %s", err->message));
929 g_clear_error (&err);
930 gst_udpsrc_stop (GST_BASE_SRC (src));
936 gst_udpsrc_unlock (GstBaseSrc * bsrc)
940 src = GST_UDPSRC (bsrc);
942 GST_LOG_OBJECT (src, "Flushing");
943 g_cancellable_cancel (src->cancellable);
949 gst_udpsrc_unlock_stop (GstBaseSrc * bsrc)
953 src = GST_UDPSRC (bsrc);
955 GST_LOG_OBJECT (src, "No longer flushing");
956 g_cancellable_reset (src->cancellable);
962 gst_udpsrc_stop (GstBaseSrc * bsrc)
966 src = GST_UDPSRC (bsrc);
968 GST_DEBUG ("stopping, closing sockets");
970 if (src->used_socket) {
971 if (src->auto_multicast
973 g_inet_address_get_is_multicast (g_inet_socket_address_get_address
977 GST_DEBUG_OBJECT (src, "leaving multicast group %s", src->host);
979 if (!g_socket_leave_multicast_group (src->used_socket,
980 g_inet_socket_address_get_address (src->addr), FALSE,
981 src->multi_iface, &err)) {
982 GST_ERROR_OBJECT (src, "Failed to leave multicast group: %s",
984 g_clear_error (&err);
988 if (src->close_socket || !src->external_socket) {
990 if (!g_socket_close (src->used_socket, &err)) {
991 GST_ERROR_OBJECT (src, "Failed to close socket: %s", err->message);
992 g_clear_error (&err);
996 g_object_unref (src->used_socket);
997 src->used_socket = NULL;
998 g_object_unref (src->addr);
1005 /*** GSTURIHANDLER INTERFACE *************************************************/
1008 gst_udpsrc_uri_get_type (GType type)
1013 static const gchar *const *
1014 gst_udpsrc_uri_get_protocols (GType type)
1016 static const gchar *protocols[] = { "udp", NULL };
1022 gst_udpsrc_uri_get_uri (GstURIHandler * handler)
1024 GstUDPSrc *src = GST_UDPSRC (handler);
1026 return g_strdup (src->uri);
1030 gst_udpsrc_uri_set_uri (GstURIHandler * handler, const gchar * uri,
1033 return gst_udpsrc_set_uri (GST_UDPSRC (handler), uri, error);
1037 gst_udpsrc_uri_handler_init (gpointer g_iface, gpointer iface_data)
1039 GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
1041 iface->get_type = gst_udpsrc_uri_get_type;
1042 iface->get_protocols = gst_udpsrc_uri_get_protocols;
1043 iface->get_uri = gst_udpsrc_uri_get_uri;
1044 iface->set_uri = gst_udpsrc_uri_set_uri;