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gstreamer/gst/udp/gstudpsrc.c

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/* GStreamer
* Copyright (C) <2005> Wim Taymans <wim@fluendo.com>
* Copyright (C) <2005> Nokia Corporation <kai.vehmanen@nokia.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-udpsrc
* @see_also: udpsink, multifdsink
*
* udpsrc is a network source that reads UDP packets from the network.
* It can be combined with RTP depayloaders to implement RTP streaming.
*
* The udpsrc element supports automatic port allocation by setting the
* #GstUDPSrc:port property to 0. After setting the udpsrc to PAUSED, the
* allocated port can be obtained by reading the port property.
*
* udpsrc can read from multicast groups by setting the #GstUDPSrc:multicast-group
* property to the IP address of the multicast group.
*
* Alternatively one can provide a custom socket to udpsrc with the #GstUDPSrc:sockfd
* property, udpsrc will then not allocate a socket itself but use the provided
* one.
*
* The #GstUDPSrc:caps property is mainly used to give a type to the UDP packet
* so that they can be autoplugged in GStreamer pipelines. This is very usefull
* for RTP implementations where the contents of the UDP packets is transfered
* out-of-bounds using SDP or other means.
*
* The #GstUDPSrc:buffer-size property is used to change the default kernel
* buffersizes used for receiving packets. The buffer size may be increased for
* high-volume connections, or may be decreased to limit the possible backlog of
* incoming data. The system places an absolute limit on these values, on Linux,
* for example, the default buffer size is typically 50K and can be increased to
* maximally 100K.
*
* The #GstUDPSrc:skip-first-bytes property is used to strip off an arbitrary
* number of bytes from the start of the raw udp packet and can be used to strip
* off proprietary header, for example.
*
* The udpsrc is always a live source. It does however not provide a #GstClock,
* this is left for upstream elements such as an RTP session manager or demuxer
* (such as an MPEG demuxer). As with all live sources, the captured buffers
* will have their timestamp set to the current running time of the pipeline.
*
* udpsrc implements a #GstURIHandler interface that handles udp://host:port
* type URIs.
*
* If the #GstUDPSrc:timeout property is set to a value bigger than 0, udpsrc
* will generate an element message named
* <classname>&quot;GstUDPSrcTimeout&quot;</classname>
* if no data was recieved in the given timeout.
* The message's structure contains one field:
* <itemizedlist>
* <listitem>
* <para>
* #guint64
* <classname>&quot;timeout&quot;</classname>: the timeout in microseconds that
* expired when waiting for data.
* </para>
* </listitem>
* </itemizedlist>
* The message is typically used to detect that no UDP arrives in the receiver
* because it is blocked by a firewall.
* </para>
* <para>
* A custom file descriptor can be configured with the
* #GstUDPSrc:sockfd property. The socket will be closed when setting the
* element to READY by default. This behaviour can be
* overriden with the #GstUDPSrc:closefd property, in which case the application
* is responsible for closing the file descriptor.
*
* <refsect2>
* <title>Examples</title>
* |[
* gst-launch -v udpsrc ! fakesink dump=1
* ]| A pipeline to read from the default port and dump the udp packets.
* To actually generate udp packets on the default port one can use the
* udpsink element. When running the following pipeline in another terminal, the
* above mentioned pipeline should dump data packets to the console.
* |[
* gst-launch -v audiotestsrc ! udpsink
* ]|
* |[
* gst-launch -v udpsrc port=0 ! fakesink
* ]| read udp packets from a free port.
* </refsect2>
*
* Last reviewed on 2007-09-20 (0.10.7)
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstudpsrc.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdlib.h>
#if defined _MSC_VER && (_MSC_VER >= 1400)
#include <io.h>
#endif
#include <gst/netbuffer/gstnetbuffer.h>
#ifdef HAVE_FIONREAD_IN_SYS_FILIO
#include <sys/filio.h>
#endif
GST_DEBUG_CATEGORY_STATIC (udpsrc_debug);
#define GST_CAT_DEFAULT (udpsrc_debug)
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
#define UDP_DEFAULT_PORT 4951
#define UDP_DEFAULT_MULTICAST_GROUP "0.0.0.0"
#define UDP_DEFAULT_MULTICAST_IFACE NULL
#define UDP_DEFAULT_URI "udp://"UDP_DEFAULT_MULTICAST_GROUP":"G_STRINGIFY(UDP_DEFAULT_PORT)
#define UDP_DEFAULT_CAPS NULL
#define UDP_DEFAULT_SOCKFD -1
#define UDP_DEFAULT_BUFFER_SIZE 0
#define UDP_DEFAULT_TIMEOUT 0
#define UDP_DEFAULT_SKIP_FIRST_BYTES 0
#define UDP_DEFAULT_CLOSEFD TRUE
#define UDP_DEFAULT_SOCK -1
#define UDP_DEFAULT_AUTO_MULTICAST TRUE
#define UDP_DEFAULT_REUSE TRUE
enum
{
PROP_0,
PROP_PORT,
PROP_MULTICAST_GROUP,
PROP_MULTICAST_IFACE,
PROP_URI,
PROP_CAPS,
PROP_SOCKFD,
PROP_BUFFER_SIZE,
PROP_TIMEOUT,
PROP_SKIP_FIRST_BYTES,
PROP_CLOSEFD,
PROP_SOCK,
PROP_AUTO_MULTICAST,
PROP_REUSE,
PROP_LAST
};
#define CLOSE_IF_REQUESTED(udpctx) \
G_STMT_START { \
if ((!udpctx->externalfd) || (udpctx->externalfd && udpctx->closefd)) { \
CLOSE_SOCKET(udpctx->sock.fd); \
if (udpctx->sock.fd == udpctx->sockfd) \
udpctx->sockfd = UDP_DEFAULT_SOCKFD; \
} \
udpctx->sock.fd = UDP_DEFAULT_SOCK; \
} G_STMT_END
static void gst_udpsrc_uri_handler_init (gpointer g_iface, gpointer iface_data);
static GstCaps *gst_udpsrc_getcaps (GstBaseSrc * src);
static GstFlowReturn gst_udpsrc_create (GstPushSrc * psrc, GstBuffer ** buf);
static gboolean gst_udpsrc_start (GstBaseSrc * bsrc);
static gboolean gst_udpsrc_stop (GstBaseSrc * bsrc);
static gboolean gst_udpsrc_unlock (GstBaseSrc * bsrc);
static gboolean gst_udpsrc_unlock_stop (GstBaseSrc * bsrc);
static void gst_udpsrc_finalize (GObject * object);
static void gst_udpsrc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_udpsrc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void
_do_init (GType type)
{
static const GInterfaceInfo urihandler_info = {
gst_udpsrc_uri_handler_init,
NULL,
NULL
};
g_type_add_interface_static (type, GST_TYPE_URI_HANDLER, &urihandler_info);
GST_DEBUG_CATEGORY_INIT (udpsrc_debug, "udpsrc", 0, "UDP src");
}
GST_BOILERPLATE_FULL (GstUDPSrc, gst_udpsrc, GstPushSrc, GST_TYPE_PUSH_SRC,
_do_init);
static void
gst_udpsrc_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_static_pad_template (element_class, &src_template);
gst_element_class_set_details_simple (element_class, "UDP packet receiver",
"Source/Network",
"Receive data over the network via UDP",
"Wim Taymans <wim@fluendo.com>, "
"Thijs Vermeir <thijs.vermeir@barco.com>");
}
static void
gst_udpsrc_class_init (GstUDPSrcClass * klass)
{
GObjectClass *gobject_class;
GstBaseSrcClass *gstbasesrc_class;
GstPushSrcClass *gstpushsrc_class;
gobject_class = (GObjectClass *) klass;
gstbasesrc_class = (GstBaseSrcClass *) klass;
gstpushsrc_class = (GstPushSrcClass *) klass;
gobject_class->set_property = gst_udpsrc_set_property;
gobject_class->get_property = gst_udpsrc_get_property;
gobject_class->finalize = gst_udpsrc_finalize;
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PORT,
g_param_spec_int ("port", "Port",
"The port to receive the packets from, 0=allocate", 0, G_MAXUINT16,
UDP_DEFAULT_PORT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_MULTICAST_GROUP,
g_param_spec_string ("multicast-group", "Multicast Group",
"The Address of multicast group to join", UDP_DEFAULT_MULTICAST_GROUP,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_MULTICAST_IFACE,
g_param_spec_string ("multicast-iface", "Multicast Interface",
"The network interface on which to join the multicast group",
UDP_DEFAULT_MULTICAST_IFACE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_URI,
g_param_spec_string ("uri", "URI",
"URI in the form of udp://multicast_group:port", UDP_DEFAULT_URI,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CAPS,
g_param_spec_boxed ("caps", "Caps",
"The caps of the source pad", GST_TYPE_CAPS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SOCKFD,
g_param_spec_int ("sockfd", "Socket Handle",
"Socket to use for UDP reception. (-1 == allocate)",
-1, G_MAXINT, UDP_DEFAULT_SOCKFD,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BUFFER_SIZE,
g_param_spec_int ("buffer-size", "Buffer Size",
"Size of the kernel receive buffer in bytes, 0=default", 0, G_MAXINT,
UDP_DEFAULT_BUFFER_SIZE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TIMEOUT,
g_param_spec_uint64 ("timeout", "Timeout",
"Post a message after timeout microseconds (0 = disabled)", 0,
G_MAXUINT64, UDP_DEFAULT_TIMEOUT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_SKIP_FIRST_BYTES, g_param_spec_int ("skip-first-bytes",
"Skip first bytes", "number of bytes to skip for each udp packet", 0,
G_MAXINT, UDP_DEFAULT_SKIP_FIRST_BYTES,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CLOSEFD,
g_param_spec_boolean ("closefd", "Close sockfd",
"Close sockfd if passed as property on state change",
UDP_DEFAULT_CLOSEFD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SOCK,
g_param_spec_int ("sock", "Socket Handle",
"Socket currently in use for UDP reception. (-1 = no socket)",
-1, G_MAXINT, UDP_DEFAULT_SOCK,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_AUTO_MULTICAST,
g_param_spec_boolean ("auto-multicast", "Auto Multicast",
"Automatically join/leave multicast groups",
UDP_DEFAULT_AUTO_MULTICAST,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_REUSE,
g_param_spec_boolean ("reuse", "Reuse", "Enable reuse of the port",
UDP_DEFAULT_REUSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gstbasesrc_class->start = gst_udpsrc_start;
gstbasesrc_class->stop = gst_udpsrc_stop;
gstbasesrc_class->unlock = gst_udpsrc_unlock;
gstbasesrc_class->unlock_stop = gst_udpsrc_unlock_stop;
gstbasesrc_class->get_caps = gst_udpsrc_getcaps;
gstpushsrc_class->create = gst_udpsrc_create;
}
static void
gst_udpsrc_init (GstUDPSrc * udpsrc, GstUDPSrcClass * g_class)
{
WSA_STARTUP (udpsrc);
gst_udp_uri_init (&udpsrc->uri, UDP_DEFAULT_MULTICAST_GROUP,
UDP_DEFAULT_PORT);
udpsrc->sockfd = UDP_DEFAULT_SOCKFD;
udpsrc->multi_iface = g_strdup (UDP_DEFAULT_MULTICAST_IFACE);
udpsrc->buffer_size = UDP_DEFAULT_BUFFER_SIZE;
udpsrc->timeout = UDP_DEFAULT_TIMEOUT;
udpsrc->skip_first_bytes = UDP_DEFAULT_SKIP_FIRST_BYTES;
udpsrc->closefd = UDP_DEFAULT_CLOSEFD;
udpsrc->externalfd = (udpsrc->sockfd != -1);
udpsrc->auto_multicast = UDP_DEFAULT_AUTO_MULTICAST;
udpsrc->sock.fd = UDP_DEFAULT_SOCK;
udpsrc->reuse = UDP_DEFAULT_REUSE;
/* configure basesrc to be a live source */
gst_base_src_set_live (GST_BASE_SRC (udpsrc), TRUE);
/* make basesrc output a segment in time */
gst_base_src_set_format (GST_BASE_SRC (udpsrc), GST_FORMAT_TIME);
/* make basesrc set timestamps on outgoing buffers based on the running_time
* when they were captured */
gst_base_src_set_do_timestamp (GST_BASE_SRC (udpsrc), TRUE);
}
static void
gst_udpsrc_finalize (GObject * object)
{
GstUDPSrc *udpsrc;
udpsrc = GST_UDPSRC (object);
if (udpsrc->caps)
gst_caps_unref (udpsrc->caps);
g_free (udpsrc->multi_iface);
gst_udp_uri_free (&udpsrc->uri);
g_free (udpsrc->uristr);
if (udpsrc->sockfd >= 0 && udpsrc->closefd)
CLOSE_SOCKET (udpsrc->sockfd);
WSA_CLEANUP (object);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstCaps *
gst_udpsrc_getcaps (GstBaseSrc * src)
{
GstUDPSrc *udpsrc;
udpsrc = GST_UDPSRC (src);
if (udpsrc->caps)
return gst_caps_ref (udpsrc->caps);
else
return gst_caps_new_any ();
}
/* read a message from the error queue */
static void
clear_error (GstUDPSrc * udpsrc)
{
#if defined (MSG_ERRQUEUE)
struct msghdr cmsg;
char cbuf[128];
char msgbuf[CMSG_SPACE (128)];
struct iovec iov;
/* Flush ERRORS from fd so next poll will not return at once */
/* No need for address : We look for local error */
cmsg.msg_name = NULL;
cmsg.msg_namelen = 0;
/* IOV */
memset (&cbuf, 0, sizeof (cbuf));
iov.iov_base = cbuf;
iov.iov_len = sizeof (cbuf);
cmsg.msg_iov = &iov;
cmsg.msg_iovlen = 1;
/* msg_control */
memset (&msgbuf, 0, sizeof (msgbuf));
cmsg.msg_control = &msgbuf;
cmsg.msg_controllen = sizeof (msgbuf);
recvmsg (udpsrc->sock.fd, &cmsg, MSG_ERRQUEUE);
#endif
}
static GstFlowReturn
gst_udpsrc_create (GstPushSrc * psrc, GstBuffer ** buf)
{
GstUDPSrc *udpsrc;
GstNetBuffer *outbuf;
union gst_sockaddr
{
struct sockaddr sa;
struct sockaddr_in sa_in;
struct sockaddr_in6 sa_in6;
struct sockaddr_storage sa_stor;
} sa;
socklen_t slen;
guint8 *pktdata;
gint pktsize;
#ifdef G_OS_UNIX
gint readsize;
#elif defined G_OS_WIN32
gulong readsize;
#endif
GstClockTime timeout;
gint ret;
gboolean try_again;
udpsrc = GST_UDPSRC_CAST (psrc);
retry:
/* quick check, avoid going in select when we already have data */
readsize = 0;
if (G_UNLIKELY ((ret =
IOCTL_SOCKET (udpsrc->sock.fd, FIONREAD, &readsize)) < 0))
goto ioctl_failed;
if (readsize > 0)
goto no_select;
if (udpsrc->timeout > 0) {
timeout = udpsrc->timeout * GST_USECOND;
} else {
timeout = GST_CLOCK_TIME_NONE;
}
do {
try_again = FALSE;
GST_LOG_OBJECT (udpsrc, "doing select, timeout %" G_GUINT64_FORMAT,
udpsrc->timeout);
ret = gst_poll_wait (udpsrc->fdset, timeout);
GST_LOG_OBJECT (udpsrc, "select returned %d", ret);
if (G_UNLIKELY (ret < 0)) {
if (errno == EBUSY)
goto stopped;
#ifdef G_OS_WIN32
if (WSAGetLastError () != WSAEINTR)
goto select_error;
#else
if (errno != EAGAIN && errno != EINTR)
goto select_error;
#endif
try_again = TRUE;
} else if (G_UNLIKELY (ret == 0)) {
/* timeout, post element message */
gst_element_post_message (GST_ELEMENT_CAST (udpsrc),
gst_message_new_element (GST_OBJECT_CAST (udpsrc),
gst_structure_new ("GstUDPSrcTimeout",
"timeout", G_TYPE_UINT64, udpsrc->timeout, NULL)));
try_again = TRUE;
}
} while (G_UNLIKELY (try_again));
/* ask how much is available for reading on the socket, this should be exactly
* one UDP packet. We will check the return value, though, because in some
* case it can return 0 and we don't want a 0 sized buffer. */
readsize = 0;
if (G_UNLIKELY ((ret =
IOCTL_SOCKET (udpsrc->sock.fd, FIONREAD, &readsize)) < 0))
goto ioctl_failed;
/* if we get here and there is nothing to read from the socket, the select got
* woken up by activity on the socket but it was not a read. We know someone
* will also do something with the socket so that we don't go into an infinite
* loop in the select(). */
if (G_UNLIKELY (!readsize)) {
clear_error (udpsrc);
goto retry;
}
no_select:
GST_LOG_OBJECT (udpsrc, "ioctl says %d bytes available", (int) readsize);
pktdata = g_malloc (readsize);
pktsize = readsize;
while (TRUE) {
slen = sizeof (sa);
#ifdef G_OS_WIN32
ret = recvfrom (udpsrc->sock.fd, (char *) pktdata, pktsize, 0, &sa.sa,
&slen);
#else
ret = recvfrom (udpsrc->sock.fd, pktdata, pktsize, 0, &sa.sa, &slen);
#endif
if (G_UNLIKELY (ret < 0)) {
#ifdef G_OS_WIN32
/* WSAECONNRESET for a UDP socket means that a packet sent with udpsink
* generated a "port unreachable" ICMP response. We ignore that and try
* again. */
if (WSAGetLastError () == WSAECONNRESET) {
g_free (pktdata);
pktdata = NULL;
goto retry;
}
if (WSAGetLastError () != WSAEINTR)
goto receive_error;
#else
if (errno != EAGAIN && errno != EINTR)
goto receive_error;
#endif
} else
break;
}
/* special case buffer so receivers can also track the address */
outbuf = gst_netbuffer_new ();
GST_BUFFER_MALLOCDATA (outbuf) = pktdata;
/* patch pktdata and len when stripping off the headers */
if (G_UNLIKELY (udpsrc->skip_first_bytes != 0)) {
if (G_UNLIKELY (readsize < udpsrc->skip_first_bytes))
goto skip_error;
pktdata += udpsrc->skip_first_bytes;
ret -= udpsrc->skip_first_bytes;
}
GST_BUFFER_DATA (outbuf) = pktdata;
GST_BUFFER_SIZE (outbuf) = ret;
switch (sa.sa.sa_family) {
case AF_INET:
{
gst_netaddress_set_ip4_address (&outbuf->from, sa.sa_in.sin_addr.s_addr,
sa.sa_in.sin_port);
}
break;
case AF_INET6:
{
guint8 ip6[16];
memcpy (ip6, &sa.sa_in6.sin6_addr, sizeof (ip6));
gst_netaddress_set_ip6_address (&outbuf->from, ip6, sa.sa_in6.sin6_port);
}
break;
default:
#ifdef G_OS_WIN32
WSASetLastError (WSAEAFNOSUPPORT);
#else
errno = EAFNOSUPPORT;
#endif
goto receive_error;
}
GST_LOG_OBJECT (udpsrc, "read %d bytes", (int) readsize);
*buf = GST_BUFFER_CAST (outbuf);
return GST_FLOW_OK;
/* ERRORS */
select_error:
{
GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
("select error %d: %s (%d)", ret, g_strerror (errno), errno));
return GST_FLOW_ERROR;
}
stopped:
{
GST_DEBUG ("stop called");
return GST_FLOW_WRONG_STATE;
}
ioctl_failed:
{
GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
("ioctl failed %d: %s (%d)", ret, g_strerror (errno), errno));
return GST_FLOW_ERROR;
}
receive_error:
{
g_free (pktdata);
#ifdef G_OS_WIN32
GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
("receive error %d (WSA error: %d)", ret, WSAGetLastError ()));
#else
GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
("receive error %d: %s (%d)", ret, g_strerror (errno), errno));
#endif
return GST_FLOW_ERROR;
}
skip_error:
{
GST_ELEMENT_ERROR (udpsrc, STREAM, DECODE, (NULL),
("UDP buffer to small to skip header"));
return GST_FLOW_ERROR;
}
}
static gboolean
gst_udpsrc_set_uri (GstUDPSrc * src, const gchar * uri)
{
if (gst_udp_parse_uri (uri, &src->uri) < 0)
goto wrong_uri;
if (src->uri.port == -1)
src->uri.port = UDP_DEFAULT_PORT;
return TRUE;
/* ERRORS */
wrong_uri:
{
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("error parsing uri %s", uri));
return FALSE;
}
}
static void
gst_udpsrc_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstUDPSrc *udpsrc = GST_UDPSRC (object);
switch (prop_id) {
case PROP_BUFFER_SIZE:
udpsrc->buffer_size = g_value_get_int (value);
break;
case PROP_PORT:
gst_udp_uri_update (&udpsrc->uri, NULL, g_value_get_int (value));
break;
case PROP_MULTICAST_GROUP:
{
const gchar *group;
if ((group = g_value_get_string (value)))
gst_udp_uri_update (&udpsrc->uri, group, -1);
else
gst_udp_uri_update (&udpsrc->uri, UDP_DEFAULT_MULTICAST_GROUP, -1);
break;
}
case PROP_MULTICAST_IFACE:
g_free (udpsrc->multi_iface);
if (g_value_get_string (value) == NULL)
udpsrc->multi_iface = g_strdup (UDP_DEFAULT_MULTICAST_IFACE);
else
udpsrc->multi_iface = g_value_dup_string (value);
break;
case PROP_URI:
gst_udpsrc_set_uri (udpsrc, g_value_get_string (value));
break;
case PROP_CAPS:
{
const GstCaps *new_caps_val = gst_value_get_caps (value);
GstCaps *new_caps;
GstCaps *old_caps;
if (new_caps_val == NULL) {
new_caps = gst_caps_new_any ();
} else {
new_caps = gst_caps_copy (new_caps_val);
}
old_caps = udpsrc->caps;
udpsrc->caps = new_caps;
if (old_caps)
gst_caps_unref (old_caps);
gst_pad_set_caps (GST_BASE_SRC (udpsrc)->srcpad, new_caps);
break;
}
case PROP_SOCKFD:
if (udpsrc->sockfd >= 0 && udpsrc->sockfd != udpsrc->sock.fd &&
udpsrc->closefd)
CLOSE_SOCKET (udpsrc->sockfd);
udpsrc->sockfd = g_value_get_int (value);
GST_DEBUG ("setting SOCKFD to %d", udpsrc->sockfd);
break;
case PROP_TIMEOUT:
udpsrc->timeout = g_value_get_uint64 (value);
break;
case PROP_SKIP_FIRST_BYTES:
udpsrc->skip_first_bytes = g_value_get_int (value);
break;
case PROP_CLOSEFD:
udpsrc->closefd = g_value_get_boolean (value);
break;
case PROP_AUTO_MULTICAST:
udpsrc->auto_multicast = g_value_get_boolean (value);
break;
case PROP_REUSE:
udpsrc->reuse = g_value_get_boolean (value);
break;
default:
break;
}
}
static void
gst_udpsrc_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstUDPSrc *udpsrc = GST_UDPSRC (object);
switch (prop_id) {
case PROP_BUFFER_SIZE:
g_value_set_int (value, udpsrc->buffer_size);
break;
case PROP_PORT:
g_value_set_int (value, udpsrc->uri.port);
break;
case PROP_MULTICAST_GROUP:
g_value_set_string (value, udpsrc->uri.host);
break;
case PROP_MULTICAST_IFACE:
g_value_set_string (value, udpsrc->multi_iface);
break;
case PROP_URI:
g_value_take_string (value, gst_udp_uri_string (&udpsrc->uri));
break;
case PROP_CAPS:
gst_value_set_caps (value, udpsrc->caps);
break;
case PROP_SOCKFD:
g_value_set_int (value, udpsrc->sockfd);
break;
case PROP_TIMEOUT:
g_value_set_uint64 (value, udpsrc->timeout);
break;
case PROP_SKIP_FIRST_BYTES:
g_value_set_int (value, udpsrc->skip_first_bytes);
break;
case PROP_CLOSEFD:
g_value_set_boolean (value, udpsrc->closefd);
break;
case PROP_SOCK:
g_value_set_int (value, udpsrc->sock.fd);
break;
case PROP_AUTO_MULTICAST:
g_value_set_boolean (value, udpsrc->auto_multicast);
break;
case PROP_REUSE:
g_value_set_boolean (value, udpsrc->reuse);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* create a socket for sending to remote machine */
static gboolean
gst_udpsrc_start (GstBaseSrc * bsrc)
{
guint bc_val;
guint err_val;
gint reuse;
int port;
GstUDPSrc *src;
gint ret;
int rcvsize;
struct sockaddr_storage bind_address;
socklen_t len;
src = GST_UDPSRC (bsrc);
if (src->sockfd == -1) {
/* need to allocate a socket */
GST_DEBUG_OBJECT (src, "allocating socket for %s:%d", src->uri.host,
src->uri.port);
if ((ret =
gst_udp_get_addr (src->uri.host, src->uri.port, &src->myaddr)) < 0)
goto getaddrinfo_error;
if ((ret = socket (src->myaddr.ss_family, SOCK_DGRAM, IPPROTO_UDP)) < 0)
goto no_socket;
src->sock.fd = ret;
src->externalfd = FALSE;
GST_DEBUG_OBJECT (src, "got socket %d", src->sock.fd);
GST_DEBUG_OBJECT (src, "setting reuse %d", src->reuse);
reuse = src->reuse ? 1 : 0;
if ((ret =
setsockopt (src->sock.fd, SOL_SOCKET, SO_REUSEADDR, &reuse,
sizeof (reuse))) < 0)
goto setsockopt_error;
GST_DEBUG_OBJECT (src, "binding on port %d", src->uri.port);
/* Take a temporary copy of the address in case we need to fix it for bind */
memcpy (&bind_address, &src->myaddr, sizeof (struct sockaddr_storage));
#ifdef G_OS_WIN32
/* Windows does not allow binding to a multicast group so fix source address */
if (gst_udp_is_multicast (&src->myaddr)) {
switch (((struct sockaddr *) &bind_address)->sa_family) {
case AF_INET:
((struct sockaddr_in *) &bind_address)->sin_addr.s_addr =
htonl (INADDR_ANY);
break;
case AF_INET6:
((struct sockaddr_in6 *) &bind_address)->sin6_addr = in6addr_any;
break;
default:
break;
}
}
#endif
len = gst_udp_get_sockaddr_length (&bind_address);
if ((ret = bind (src->sock.fd, (struct sockaddr *) &bind_address, len)) < 0)
goto bind_error;
if (!gst_udp_is_multicast (&src->myaddr)) {
len = sizeof (src->myaddr);
if ((ret = getsockname (src->sock.fd, (struct sockaddr *) &src->myaddr,
&len)) < 0)
goto getsockname_error;
}
} else {
GST_DEBUG_OBJECT (src, "using provided socket %d", src->sockfd);
/* we use the configured socket, try to get some info about it */
len = sizeof (src->myaddr);
if ((ret =
getsockname (src->sockfd, (struct sockaddr *) &src->myaddr,
&len)) < 0)
goto getsockname_error;
src->sock.fd = src->sockfd;
src->externalfd = TRUE;
}
len = sizeof (rcvsize);
if (src->buffer_size != 0) {
rcvsize = src->buffer_size;
GST_DEBUG_OBJECT (src, "setting udp buffer of %d bytes", rcvsize);
/* set buffer size, Note that on Linux this is typically limited to a
* maximum of around 100K. Also a minimum of 128 bytes is required on
* Linux. */
ret =
setsockopt (src->sock.fd, SOL_SOCKET, SO_RCVBUF, (void *) &rcvsize,
len);
if (ret != 0) {
GST_ELEMENT_WARNING (src, RESOURCE, SETTINGS, (NULL),
("Could not create a buffer of requested %d bytes, %d: %s (%d)",
rcvsize, ret, g_strerror (errno), errno));
}
}
/* read the value of the receive buffer. Note that on linux this returns 2x the
* value we set because the kernel allocates extra memory for metadata.
* The default on Linux is about 100K (which is about 50K without metadata) */
ret =
getsockopt (src->sock.fd, SOL_SOCKET, SO_RCVBUF, (void *) &rcvsize, &len);
if (ret == 0)
GST_DEBUG_OBJECT (src, "have udp buffer of %d bytes", rcvsize);
else
GST_DEBUG_OBJECT (src, "could not get udp buffer size");
bc_val = 1;
if ((ret = setsockopt (src->sock.fd, SOL_SOCKET, SO_BROADCAST, &bc_val,
sizeof (bc_val))) < 0) {
GST_ELEMENT_WARNING (src, RESOURCE, SETTINGS, (NULL),
("could not configure socket for broadcast %d: %s (%d)", ret,
g_strerror (errno), errno));
}
/* Accept ERRQUEUE to get and flush icmp errors */
err_val = 1;
#if defined (IP_RECVERR)
if ((ret = setsockopt (src->sock.fd, IPPROTO_IP, IP_RECVERR, &err_val,
sizeof (err_val))) < 0) {
GST_ELEMENT_WARNING (src, RESOURCE, SETTINGS, (NULL),
("could not configure socket for IP_RECVERR %d: %s (%d)", ret,
g_strerror (errno), errno));
}
#endif
if (src->auto_multicast && gst_udp_is_multicast (&src->myaddr)) {
GST_DEBUG_OBJECT (src, "joining multicast group %s", src->uri.host);
ret = gst_udp_join_group (src->sock.fd, &src->myaddr, src->multi_iface);
if (ret < 0)
goto membership;
}
/* NOTE: sockaddr_in.sin_port works for ipv4 and ipv6 because sin_port
* follows ss_family on both */
port = g_ntohs (((struct sockaddr_in *) &src->myaddr)->sin_port);
GST_DEBUG_OBJECT (src, "bound, on port %d", port);
if (port != src->uri.port) {
src->uri.port = port;
GST_DEBUG_OBJECT (src, "notifying port %d", port);
g_object_notify (G_OBJECT (src), "port");
}
if ((src->fdset = gst_poll_new (TRUE)) == NULL)
goto no_fdset;
gst_poll_add_fd (src->fdset, &src->sock);
gst_poll_fd_ctl_read (src->fdset, &src->sock, TRUE);
return TRUE;
/* ERRORS */
getaddrinfo_error:
{
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("getaddrinfo failed: %s (%d)", gai_strerror (ret), ret));
return FALSE;
}
no_socket:
{
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
("no socket error %d: %s (%d)", ret, g_strerror (errno), errno));
return FALSE;
}
setsockopt_error:
{
CLOSE_IF_REQUESTED (src);
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("setsockopt failed %d: %s (%d)", ret, g_strerror (errno), errno));
return FALSE;
}
bind_error:
{
CLOSE_IF_REQUESTED (src);
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("bind failed %d: %s (%d)", ret, g_strerror (errno), errno));
return FALSE;
}
membership:
{
CLOSE_IF_REQUESTED (src);
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("could add membership %d: %s (%d)", ret, g_strerror (errno), errno));
return FALSE;
}
getsockname_error:
{
CLOSE_IF_REQUESTED (src);
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("getsockname failed %d: %s (%d)", ret, g_strerror (errno), errno));
return FALSE;
}
no_fdset:
{
CLOSE_IF_REQUESTED (src);
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ_WRITE, (NULL),
("could not create an fdset %d: %s (%d)", ret, g_strerror (errno),
errno));
return FALSE;
}
}
static gboolean
gst_udpsrc_unlock (GstBaseSrc * bsrc)
{
GstUDPSrc *src;
src = GST_UDPSRC (bsrc);
GST_LOG_OBJECT (src, "Flushing");
gst_poll_set_flushing (src->fdset, TRUE);
return TRUE;
}
static gboolean
gst_udpsrc_unlock_stop (GstBaseSrc * bsrc)
{
GstUDPSrc *src;
src = GST_UDPSRC (bsrc);
GST_LOG_OBJECT (src, "No longer flushing");
gst_poll_set_flushing (src->fdset, FALSE);
return TRUE;
}
static gboolean
gst_udpsrc_stop (GstBaseSrc * bsrc)
{
GstUDPSrc *src;
src = GST_UDPSRC (bsrc);
GST_DEBUG ("stopping, closing sockets");
if (src->sock.fd >= 0) {
if (src->auto_multicast && gst_udp_is_multicast (&src->myaddr)) {
GST_DEBUG_OBJECT (src, "leaving multicast group %s", src->uri.host);
gst_udp_leave_group (src->sock.fd, &src->myaddr);
}
CLOSE_IF_REQUESTED (src);
}
if (src->fdset) {
gst_poll_free (src->fdset);
src->fdset = NULL;
}
return TRUE;
}
/*** GSTURIHANDLER INTERFACE *************************************************/
static GstURIType
gst_udpsrc_uri_get_type (void)
{
return GST_URI_SRC;
}
static gchar **
gst_udpsrc_uri_get_protocols (void)
{
static gchar *protocols[] = { (char *) "udp", NULL };
return protocols;
}
static const gchar *
gst_udpsrc_uri_get_uri (GstURIHandler * handler)
{
GstUDPSrc *src = GST_UDPSRC (handler);
g_free (src->uristr);
src->uristr = gst_udp_uri_string (&src->uri);
return src->uristr;
}
static gboolean
gst_udpsrc_uri_set_uri (GstURIHandler * handler, const gchar * uri)
{
gboolean ret;
GstUDPSrc *src = GST_UDPSRC (handler);
ret = gst_udpsrc_set_uri (src, uri);
return ret;
}
static void
gst_udpsrc_uri_handler_init (gpointer g_iface, gpointer iface_data)
{
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
iface->get_type = gst_udpsrc_uri_get_type;
iface->get_protocols = gst_udpsrc_uri_get_protocols;
iface->get_uri = gst_udpsrc_uri_get_uri;
iface->set_uri = gst_udpsrc_uri_set_uri;
}
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