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 /* not 100% correct, but a good upper bound for memory allocation purposes */
120 #define MAX_IPV4_UDP_PACKET_SIZE (65536 - 8)
122 GST_DEBUG_CATEGORY_STATIC (udpsrc_debug);
123 #define GST_CAT_DEFAULT (udpsrc_debug)
125 static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
128 GST_STATIC_CAPS_ANY);
130 #define UDP_DEFAULT_PORT 5004
131 #define UDP_DEFAULT_MULTICAST_GROUP "0.0.0.0"
132 #define UDP_DEFAULT_MULTICAST_IFACE NULL
133 #define UDP_DEFAULT_URI "udp://"UDP_DEFAULT_MULTICAST_GROUP":"G_STRINGIFY(UDP_DEFAULT_PORT)
134 #define UDP_DEFAULT_CAPS NULL
135 #define UDP_DEFAULT_SOCKET NULL
136 #define UDP_DEFAULT_BUFFER_SIZE 0
137 #define UDP_DEFAULT_TIMEOUT 0
138 #define UDP_DEFAULT_SKIP_FIRST_BYTES 0
139 #define UDP_DEFAULT_CLOSE_SOCKET TRUE
140 #define UDP_DEFAULT_USED_SOCKET NULL
141 #define UDP_DEFAULT_AUTO_MULTICAST TRUE
142 #define UDP_DEFAULT_REUSE TRUE
149 PROP_MULTICAST_GROUP,
150 PROP_MULTICAST_IFACE,
156 PROP_SKIP_FIRST_BYTES,
165 static void gst_udpsrc_uri_handler_init (gpointer g_iface, gpointer iface_data);
167 static GstCaps *gst_udpsrc_getcaps (GstBaseSrc * src, GstCaps * filter);
169 static GstFlowReturn gst_udpsrc_create (GstPushSrc * psrc, GstBuffer ** buf);
171 static gboolean gst_udpsrc_start (GstBaseSrc * bsrc);
173 static gboolean gst_udpsrc_stop (GstBaseSrc * bsrc);
175 static gboolean gst_udpsrc_unlock (GstBaseSrc * bsrc);
177 static gboolean gst_udpsrc_unlock_stop (GstBaseSrc * bsrc);
179 static void gst_udpsrc_finalize (GObject * object);
181 static void gst_udpsrc_set_property (GObject * object, guint prop_id,
182 const GValue * value, GParamSpec * pspec);
183 static void gst_udpsrc_get_property (GObject * object, guint prop_id,
184 GValue * value, GParamSpec * pspec);
186 #define gst_udpsrc_parent_class parent_class
187 G_DEFINE_TYPE_WITH_CODE (GstUDPSrc, gst_udpsrc, GST_TYPE_PUSH_SRC,
188 G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER, gst_udpsrc_uri_handler_init));
191 gst_udpsrc_class_init (GstUDPSrcClass * klass)
193 GObjectClass *gobject_class;
194 GstElementClass *gstelement_class;
195 GstBaseSrcClass *gstbasesrc_class;
196 GstPushSrcClass *gstpushsrc_class;
198 gobject_class = (GObjectClass *) klass;
199 gstelement_class = (GstElementClass *) klass;
200 gstbasesrc_class = (GstBaseSrcClass *) klass;
201 gstpushsrc_class = (GstPushSrcClass *) klass;
203 GST_DEBUG_CATEGORY_INIT (udpsrc_debug, "udpsrc", 0, "UDP src");
205 gobject_class->set_property = gst_udpsrc_set_property;
206 gobject_class->get_property = gst_udpsrc_get_property;
207 gobject_class->finalize = gst_udpsrc_finalize;
209 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PORT,
210 g_param_spec_int ("port", "Port",
211 "The port to receive the packets from, 0=allocate", 0, G_MAXUINT16,
212 UDP_DEFAULT_PORT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
213 g_object_class_install_property (gobject_class, PROP_MULTICAST_GROUP,
214 g_param_spec_string ("multicast-group", "Multicast Group",
215 "The Address of multicast group to join", UDP_DEFAULT_MULTICAST_GROUP,
216 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
217 g_object_class_install_property (gobject_class, PROP_MULTICAST_IFACE,
218 g_param_spec_string ("multicast-iface", "Multicast Interface",
219 "The network interface on which to join the multicast group",
220 UDP_DEFAULT_MULTICAST_IFACE,
221 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
222 g_object_class_install_property (gobject_class, PROP_URI,
223 g_param_spec_string ("uri", "URI",
224 "URI in the form of udp://multicast_group:port", UDP_DEFAULT_URI,
225 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
226 g_object_class_install_property (gobject_class, PROP_CAPS,
227 g_param_spec_boxed ("caps", "Caps",
228 "The caps of the source pad", GST_TYPE_CAPS,
229 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
230 g_object_class_install_property (gobject_class, PROP_SOCKET,
231 g_param_spec_object ("socket", "Socket",
232 "Socket to use for UDP reception. (NULL == allocate)",
233 G_TYPE_SOCKET, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
234 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BUFFER_SIZE,
235 g_param_spec_int ("buffer-size", "Buffer Size",
236 "Size of the kernel receive buffer in bytes, 0=default", 0, G_MAXINT,
237 UDP_DEFAULT_BUFFER_SIZE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
238 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TIMEOUT,
239 g_param_spec_uint64 ("timeout", "Timeout",
240 "Post a message after timeout nanoseconds (0 = disabled)", 0,
241 G_MAXUINT64, UDP_DEFAULT_TIMEOUT,
242 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
243 g_object_class_install_property (G_OBJECT_CLASS (klass),
244 PROP_SKIP_FIRST_BYTES, g_param_spec_int ("skip-first-bytes",
245 "Skip first bytes", "number of bytes to skip for each udp packet", 0,
246 G_MAXINT, UDP_DEFAULT_SKIP_FIRST_BYTES,
247 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
248 g_object_class_install_property (gobject_class, PROP_CLOSE_SOCKET,
249 g_param_spec_boolean ("close-socket", "Close socket",
250 "Close socket if passed as property on state change",
251 UDP_DEFAULT_CLOSE_SOCKET,
252 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
253 g_object_class_install_property (gobject_class, PROP_USED_SOCKET,
254 g_param_spec_object ("used-socket", "Socket Handle",
255 "Socket currently in use for UDP reception. (NULL = no socket)",
256 G_TYPE_SOCKET, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
257 g_object_class_install_property (gobject_class, PROP_AUTO_MULTICAST,
258 g_param_spec_boolean ("auto-multicast", "Auto Multicast",
259 "Automatically join/leave multicast groups",
260 UDP_DEFAULT_AUTO_MULTICAST,
261 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
262 g_object_class_install_property (gobject_class, PROP_REUSE,
263 g_param_spec_boolean ("reuse", "Reuse", "Enable reuse of the port",
264 UDP_DEFAULT_REUSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
266 gst_element_class_add_pad_template (gstelement_class,
267 gst_static_pad_template_get (&src_template));
269 gst_element_class_set_static_metadata (gstelement_class,
270 "UDP packet receiver", "Source/Network",
271 "Receive data over the network via UDP",
272 "Wim Taymans <wim@fluendo.com>, "
273 "Thijs Vermeir <thijs.vermeir@barco.com>");
275 gstbasesrc_class->start = gst_udpsrc_start;
276 gstbasesrc_class->stop = gst_udpsrc_stop;
277 gstbasesrc_class->unlock = gst_udpsrc_unlock;
278 gstbasesrc_class->unlock_stop = gst_udpsrc_unlock_stop;
279 gstbasesrc_class->get_caps = gst_udpsrc_getcaps;
281 gstpushsrc_class->create = gst_udpsrc_create;
285 gst_udpsrc_init (GstUDPSrc * udpsrc)
288 g_strdup_printf ("udp://%s:%u", UDP_DEFAULT_MULTICAST_GROUP,
291 udpsrc->host = g_strdup (UDP_DEFAULT_MULTICAST_GROUP);
292 udpsrc->port = UDP_DEFAULT_PORT;
293 udpsrc->socket = UDP_DEFAULT_SOCKET;
294 udpsrc->multi_iface = g_strdup (UDP_DEFAULT_MULTICAST_IFACE);
295 udpsrc->buffer_size = UDP_DEFAULT_BUFFER_SIZE;
296 udpsrc->timeout = UDP_DEFAULT_TIMEOUT;
297 udpsrc->skip_first_bytes = UDP_DEFAULT_SKIP_FIRST_BYTES;
298 udpsrc->close_socket = UDP_DEFAULT_CLOSE_SOCKET;
299 udpsrc->external_socket = (udpsrc->socket != NULL);
300 udpsrc->auto_multicast = UDP_DEFAULT_AUTO_MULTICAST;
301 udpsrc->used_socket = UDP_DEFAULT_USED_SOCKET;
302 udpsrc->reuse = UDP_DEFAULT_REUSE;
304 udpsrc->cancellable = g_cancellable_new ();
306 /* configure basesrc to be a live source */
307 gst_base_src_set_live (GST_BASE_SRC (udpsrc), TRUE);
308 /* make basesrc output a segment in time */
309 gst_base_src_set_format (GST_BASE_SRC (udpsrc), GST_FORMAT_TIME);
310 /* make basesrc set timestamps on outgoing buffers based on the running_time
311 * when they were captured */
312 gst_base_src_set_do_timestamp (GST_BASE_SRC (udpsrc), TRUE);
316 gst_udpsrc_finalize (GObject * object)
320 udpsrc = GST_UDPSRC (object);
323 gst_caps_unref (udpsrc->caps);
326 g_free (udpsrc->multi_iface);
327 udpsrc->multi_iface = NULL;
329 g_free (udpsrc->uri);
332 g_free (udpsrc->host);
336 g_object_unref (udpsrc->socket);
337 udpsrc->socket = NULL;
339 if (udpsrc->used_socket)
340 g_object_unref (udpsrc->used_socket);
341 udpsrc->used_socket = NULL;
343 if (udpsrc->cancellable)
344 g_object_unref (udpsrc->cancellable);
345 udpsrc->cancellable = NULL;
347 G_OBJECT_CLASS (parent_class)->finalize (object);
351 gst_udpsrc_getcaps (GstBaseSrc * src, GstCaps * filter)
355 udpsrc = GST_UDPSRC (src);
358 return (filter) ? gst_caps_intersect_full (filter, udpsrc->caps,
359 GST_CAPS_INTERSECT_FIRST) : gst_caps_ref (udpsrc->caps);
361 return (filter) ? gst_caps_ref (filter) : gst_caps_new_any ();
366 gst_udpsrc_create (GstPushSrc * psrc, GstBuffer ** buf)
372 GSocketAddress *saddr = NULL;
379 udpsrc = GST_UDPSRC_CAST (psrc);
382 /* quick check, avoid going in select when we already have data */
383 readsize = g_socket_get_available_bytes (udpsrc->used_socket);
393 timeout = udpsrc->timeout / 1000;
397 GST_LOG_OBJECT (udpsrc, "doing select, timeout %" G_GUINT64_FORMAT,
400 if (!g_socket_condition_timed_wait (udpsrc->used_socket, G_IO_IN | G_IO_PRI,
401 timeout, udpsrc->cancellable, &err)) {
402 if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_BUSY)
403 || g_error_matches (err, G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
405 } else if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_TIMED_OUT)) {
406 g_clear_error (&err);
407 /* timeout, post element message */
408 gst_element_post_message (GST_ELEMENT_CAST (udpsrc),
409 gst_message_new_element (GST_OBJECT_CAST (udpsrc),
410 gst_structure_new ("GstUDPSrcTimeout",
411 "timeout", G_TYPE_UINT64, udpsrc->timeout, NULL)));
418 } while (G_UNLIKELY (try_again));
420 /* ask how much is available for reading on the socket, this should be exactly
421 * one UDP packet. We will check the return value, though, because in some
422 * case it can return 0 and we don't want a 0 sized buffer. */
423 readsize = g_socket_get_available_bytes (udpsrc->used_socket);
424 if (G_UNLIKELY (readsize < 0))
425 goto get_available_error;
427 /* If we get here and the readsize is zero, then either select was woken up
428 * by activity that is not a read, or a poll error occurred, or a UDP packet
429 * was received that has no data. Since we cannot identify which case it is,
430 * we handle all of them. This could possibly lead to a UDP packet getting
431 * lost, but since UDP is not reliable, we can accept this. */
432 if (G_UNLIKELY (!readsize)) {
433 /* try to read a packet (and it will be ignored),
434 * in case a packet with no data arrived */
436 g_socket_receive_from (udpsrc->used_socket, NULL, NULL,
437 0, udpsrc->cancellable, &err);
438 if (G_UNLIKELY (res < 0))
446 GST_LOG_OBJECT (udpsrc, "ioctl says %d bytes available", (int) readsize);
448 /* sanity check value from _get_available_bytes(), which might be as
449 * large as the kernel-side buffer on some operating systems */
450 if (g_socket_get_family (udpsrc->used_socket) == G_SOCKET_FAMILY_IPV4)
451 readsize = MIN (MAX_IPV4_UDP_PACKET_SIZE, readsize);
453 ret = GST_BASE_SRC_CLASS (parent_class)->alloc (GST_BASE_SRC_CAST (udpsrc),
454 -1, readsize, &outbuf);
455 if (ret != GST_FLOW_OK)
458 gst_buffer_map (outbuf, &info, GST_MAP_WRITE);
462 g_object_unref (saddr);
466 g_socket_receive_from (udpsrc->used_socket, &saddr, (gchar *) info.data,
467 info.size, udpsrc->cancellable, &err);
469 if (G_UNLIKELY (res < 0)) {
470 /* EHOSTUNREACH for a UDP socket means that a packet sent with udpsink
471 * generated a "port unreachable" ICMP response. We ignore that and try
473 if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_HOST_UNREACHABLE)) {
474 gst_buffer_unmap (outbuf, &info);
475 gst_buffer_unref (outbuf);
477 g_clear_error (&err);
483 /* patch offset and size when stripping off the headers */
484 if (G_UNLIKELY (udpsrc->skip_first_bytes != 0)) {
485 if (G_UNLIKELY (readsize < udpsrc->skip_first_bytes))
488 offset += udpsrc->skip_first_bytes;
489 res -= udpsrc->skip_first_bytes;
492 gst_buffer_unmap (outbuf, &info);
493 gst_buffer_resize (outbuf, offset, res);
495 /* use buffer metadata so receivers can also track the address */
497 gst_buffer_add_net_address_meta (outbuf, saddr);
498 g_object_unref (saddr);
502 GST_LOG_OBJECT (udpsrc, "read %d bytes", (int) readsize);
504 *buf = GST_BUFFER_CAST (outbuf);
511 GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
512 ("select error: %s", err->message));
513 g_clear_error (&err);
514 return GST_FLOW_ERROR;
518 GST_DEBUG ("stop called");
519 g_clear_error (&err);
520 return GST_FLOW_FLUSHING;
524 GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
525 ("get available bytes failed"));
526 return GST_FLOW_ERROR;
530 GST_DEBUG ("Allocation failed");
535 gst_buffer_unmap (outbuf, &info);
536 gst_buffer_unref (outbuf);
538 if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_BUSY) ||
539 g_error_matches (err, G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
540 g_clear_error (&err);
541 return GST_FLOW_FLUSHING;
543 GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
544 ("receive error %" G_GSSIZE_FORMAT ": %s", res, err->message));
545 g_clear_error (&err);
546 return GST_FLOW_ERROR;
551 gst_buffer_unmap (outbuf, &info);
552 gst_buffer_unref (outbuf);
554 GST_ELEMENT_ERROR (udpsrc, STREAM, DECODE, (NULL),
555 ("UDP buffer to small to skip header"));
556 return GST_FLOW_ERROR;
561 gst_udpsrc_set_uri (GstUDPSrc * src, const gchar * uri, GError ** error)
566 if (!gst_udp_parse_uri (uri, &host, &port))
569 if (port == (guint16) - 1)
570 port = UDP_DEFAULT_PORT;
577 src->uri = g_strdup (uri);
584 GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
585 ("error parsing uri %s", uri));
586 g_set_error_literal (error, GST_URI_ERROR, GST_URI_ERROR_BAD_URI,
587 "Could not parse UDP URI");
593 gst_udpsrc_set_property (GObject * object, guint prop_id, const GValue * value,
596 GstUDPSrc *udpsrc = GST_UDPSRC (object);
599 case PROP_BUFFER_SIZE:
600 udpsrc->buffer_size = g_value_get_int (value);
603 udpsrc->port = g_value_get_int (value);
604 g_free (udpsrc->uri);
605 udpsrc->uri = g_strdup_printf ("udp://%s:%u", udpsrc->host, udpsrc->port);
607 case PROP_MULTICAST_GROUP:
611 g_free (udpsrc->host);
612 if ((group = g_value_get_string (value)))
613 udpsrc->host = g_strdup (group);
615 udpsrc->host = g_strdup (UDP_DEFAULT_MULTICAST_GROUP);
617 g_free (udpsrc->uri);
618 udpsrc->uri = g_strdup_printf ("udp://%s:%u", udpsrc->host, udpsrc->port);
621 case PROP_MULTICAST_IFACE:
622 g_free (udpsrc->multi_iface);
624 if (g_value_get_string (value) == NULL)
625 udpsrc->multi_iface = g_strdup (UDP_DEFAULT_MULTICAST_IFACE);
627 udpsrc->multi_iface = g_value_dup_string (value);
630 gst_udpsrc_set_uri (udpsrc, g_value_get_string (value), NULL);
634 const GstCaps *new_caps_val = gst_value_get_caps (value);
640 if (new_caps_val == NULL) {
641 new_caps = gst_caps_new_any ();
643 new_caps = gst_caps_copy (new_caps_val);
646 old_caps = udpsrc->caps;
647 udpsrc->caps = new_caps;
649 gst_caps_unref (old_caps);
650 gst_pad_set_caps (GST_BASE_SRC (udpsrc)->srcpad, new_caps);
654 if (udpsrc->socket != NULL && udpsrc->socket != udpsrc->used_socket &&
655 udpsrc->close_socket) {
658 if (!g_socket_close (udpsrc->socket, &err)) {
659 GST_ERROR ("failed to close socket %p: %s", udpsrc->socket,
661 g_clear_error (&err);
665 g_object_unref (udpsrc->socket);
666 udpsrc->socket = g_value_dup_object (value);
667 GST_DEBUG ("setting socket to %p", udpsrc->socket);
670 udpsrc->timeout = g_value_get_uint64 (value);
672 case PROP_SKIP_FIRST_BYTES:
673 udpsrc->skip_first_bytes = g_value_get_int (value);
675 case PROP_CLOSE_SOCKET:
676 udpsrc->close_socket = g_value_get_boolean (value);
678 case PROP_AUTO_MULTICAST:
679 udpsrc->auto_multicast = g_value_get_boolean (value);
682 udpsrc->reuse = g_value_get_boolean (value);
690 gst_udpsrc_get_property (GObject * object, guint prop_id, GValue * value,
693 GstUDPSrc *udpsrc = GST_UDPSRC (object);
696 case PROP_BUFFER_SIZE:
697 g_value_set_int (value, udpsrc->buffer_size);
700 g_value_set_int (value, udpsrc->port);
702 case PROP_MULTICAST_GROUP:
703 g_value_set_string (value, udpsrc->host);
705 case PROP_MULTICAST_IFACE:
706 g_value_set_string (value, udpsrc->multi_iface);
709 g_value_set_string (value, udpsrc->uri);
712 gst_value_set_caps (value, udpsrc->caps);
715 g_value_set_object (value, udpsrc->socket);
718 g_value_set_uint64 (value, udpsrc->timeout);
720 case PROP_SKIP_FIRST_BYTES:
721 g_value_set_int (value, udpsrc->skip_first_bytes);
723 case PROP_CLOSE_SOCKET:
724 g_value_set_boolean (value, udpsrc->close_socket);
726 case PROP_USED_SOCKET:
727 g_value_set_object (value, udpsrc->used_socket);
729 case PROP_AUTO_MULTICAST:
730 g_value_set_boolean (value, udpsrc->auto_multicast);
733 g_value_set_boolean (value, udpsrc->reuse);
736 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
741 /* create a socket for sending to remote machine */
743 gst_udpsrc_start (GstBaseSrc * bsrc)
746 GInetAddress *addr, *bind_addr;
747 GSocketAddress *bind_saddr;
751 src = GST_UDPSRC (bsrc);
753 if (src->socket == NULL) {
754 /* need to allocate a socket */
755 GST_DEBUG_OBJECT (src, "allocating socket for %s:%d", src->host, src->port);
757 addr = g_inet_address_new_from_string (src->host);
761 GST_DEBUG_OBJECT (src, "resolving IP address for host %s", src->host);
762 resolver = g_resolver_get_default ();
764 g_resolver_lookup_by_name (resolver, src->host, src->cancellable,
768 addr = G_INET_ADDRESS (g_object_ref (results->data));
770 g_resolver_free_addresses (results);
771 g_object_unref (resolver);
773 #ifndef GST_DISABLE_GST_DEBUG
775 gchar *ip = g_inet_address_to_string (addr);
777 GST_DEBUG_OBJECT (src, "IP address for host %s is %s", src->host, ip);
782 if ((src->used_socket =
783 g_socket_new (g_inet_address_get_family (addr),
784 G_SOCKET_TYPE_DATAGRAM, G_SOCKET_PROTOCOL_UDP, &err)) == NULL)
787 src->external_socket = FALSE;
789 GST_DEBUG_OBJECT (src, "got socket %p", src->used_socket);
792 g_object_unref (src->addr);
794 G_INET_SOCKET_ADDRESS (g_inet_socket_address_new (addr, src->port));
796 GST_DEBUG_OBJECT (src, "binding on port %d", src->port);
798 if (g_inet_address_get_is_multicast (addr))
799 bind_addr = g_inet_address_new_any (g_inet_address_get_family (addr));
801 bind_addr = G_INET_ADDRESS (g_object_ref (addr));
803 g_object_unref (addr);
805 bind_saddr = g_inet_socket_address_new (bind_addr, src->port);
806 g_object_unref (bind_addr);
807 if (!g_socket_bind (src->used_socket, bind_saddr, src->reuse, &err))
810 g_object_unref (bind_saddr);
812 GST_DEBUG_OBJECT (src, "using provided socket %p", src->socket);
813 /* we use the configured socket, try to get some info about it */
814 src->used_socket = G_SOCKET (g_object_ref (src->socket));
815 src->external_socket = TRUE;
818 g_object_unref (src->addr);
820 G_INET_SOCKET_ADDRESS (g_socket_get_local_address (src->used_socket,
823 goto getsockname_error;
831 len = sizeof (rcvsize);
832 if (src->buffer_size != 0) {
833 rcvsize = src->buffer_size;
835 GST_DEBUG_OBJECT (src, "setting udp buffer of %d bytes", rcvsize);
836 /* set buffer size, Note that on Linux this is typically limited to a
837 * maximum of around 100K. Also a minimum of 128 bytes is required on
840 setsockopt (g_socket_get_fd (src->used_socket), SOL_SOCKET, SO_RCVBUF,
841 (void *) &rcvsize, len);
843 GST_ELEMENT_WARNING (src, RESOURCE, SETTINGS, (NULL),
844 ("Could not create a buffer of requested %d bytes, %d: %s (%d)",
845 rcvsize, ret, g_strerror (errno), errno));
849 /* read the value of the receive buffer. Note that on linux this returns 2x the
850 * value we set because the kernel allocates extra memory for metadata.
851 * The default on Linux is about 100K (which is about 50K without metadata) */
853 getsockopt (g_socket_get_fd (src->used_socket), SOL_SOCKET, SO_RCVBUF,
854 (void *) &rcvsize, &len);
856 GST_DEBUG_OBJECT (src, "have udp buffer of %d bytes", rcvsize);
858 GST_DEBUG_OBJECT (src, "could not get udp buffer size");
862 g_socket_set_broadcast (src->used_socket, TRUE);
864 if (src->auto_multicast
866 g_inet_address_get_is_multicast (g_inet_socket_address_get_address
868 GST_DEBUG_OBJECT (src, "joining multicast group %s", src->host);
869 if (!g_socket_join_multicast_group (src->used_socket,
870 g_inet_socket_address_get_address (src->addr),
871 FALSE, src->multi_iface, &err))
875 /* NOTE: sockaddr_in.sin_port works for ipv4 and ipv6 because sin_port
876 * follows ss_family on both */
878 GInetSocketAddress *addr;
882 G_INET_SOCKET_ADDRESS (g_socket_get_local_address (src->used_socket,
885 goto getsockname_error;
887 port = g_inet_socket_address_get_port (addr);
888 GST_DEBUG_OBJECT (src, "bound, on port %d", port);
889 if (port != src->port) {
891 GST_DEBUG_OBJECT (src, "notifying port %d", port);
892 g_object_notify (G_OBJECT (src), "port");
894 g_object_unref (addr);
902 GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
903 ("Name resolval failed: %s", err->message));
904 g_clear_error (&err);
905 g_object_unref (resolver);
910 GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
911 ("no socket error: %s", err->message));
912 g_clear_error (&err);
913 g_object_unref (addr);
918 GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
919 ("bind failed: %s", err->message));
920 g_clear_error (&err);
921 g_object_unref (bind_saddr);
922 gst_udpsrc_stop (GST_BASE_SRC (src));
927 GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
928 ("could add membership: %s", err->message));
929 g_clear_error (&err);
930 gst_udpsrc_stop (GST_BASE_SRC (src));
935 GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
936 ("getsockname failed: %s", err->message));
937 g_clear_error (&err);
938 gst_udpsrc_stop (GST_BASE_SRC (src));
944 gst_udpsrc_unlock (GstBaseSrc * bsrc)
948 src = GST_UDPSRC (bsrc);
950 GST_LOG_OBJECT (src, "Flushing");
951 g_cancellable_cancel (src->cancellable);
957 gst_udpsrc_unlock_stop (GstBaseSrc * bsrc)
961 src = GST_UDPSRC (bsrc);
963 GST_LOG_OBJECT (src, "No longer flushing");
964 g_cancellable_reset (src->cancellable);
970 gst_udpsrc_stop (GstBaseSrc * bsrc)
974 src = GST_UDPSRC (bsrc);
976 GST_DEBUG ("stopping, closing sockets");
978 if (src->used_socket) {
979 if (src->auto_multicast
981 g_inet_address_get_is_multicast (g_inet_socket_address_get_address
985 GST_DEBUG_OBJECT (src, "leaving multicast group %s", src->host);
987 if (!g_socket_leave_multicast_group (src->used_socket,
988 g_inet_socket_address_get_address (src->addr), FALSE,
989 src->multi_iface, &err)) {
990 GST_ERROR_OBJECT (src, "Failed to leave multicast group: %s",
992 g_clear_error (&err);
996 if (src->close_socket || !src->external_socket) {
998 if (!g_socket_close (src->used_socket, &err)) {
999 GST_ERROR_OBJECT (src, "Failed to close socket: %s", err->message);
1000 g_clear_error (&err);
1004 g_object_unref (src->used_socket);
1005 src->used_socket = NULL;
1006 g_object_unref (src->addr);
1013 /*** GSTURIHANDLER INTERFACE *************************************************/
1016 gst_udpsrc_uri_get_type (GType type)
1021 static const gchar *const *
1022 gst_udpsrc_uri_get_protocols (GType type)
1024 static const gchar *protocols[] = { "udp", NULL };
1030 gst_udpsrc_uri_get_uri (GstURIHandler * handler)
1032 GstUDPSrc *src = GST_UDPSRC (handler);
1034 return g_strdup (src->uri);
1038 gst_udpsrc_uri_set_uri (GstURIHandler * handler, const gchar * uri,
1041 return gst_udpsrc_set_uri (GST_UDPSRC (handler), uri, error);
1045 gst_udpsrc_uri_handler_init (gpointer g_iface, gpointer iface_data)
1047 GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
1049 iface->get_type = gst_udpsrc_uri_get_type;
1050 iface->get_protocols = gst_udpsrc_uri_get_protocols;
1051 iface->get_uri = gst_udpsrc_uri_get_uri;
1052 iface->set_uri = gst_udpsrc_uri_set_uri;