gst/udp/: Added multifdsink to send UDP to multiple addresses.

Original commit message from CVS:
* gst/udp/.cvsignore:
* gst/udp/Makefile.am:
* gst/udp/gstmultiudpsink.c: (gst_multiudpsink_get_type),
(gst_multiudpsink_base_init), (gst_multiudpsink_class_init),
(gst_multiudpsink_init), (gst_multiudpsink_finalize),
(gst_multiudpsink_get_times), (gst_multiudpsink_render),
(gst_multiudpsink_set_property), (gst_multiudpsink_get_property),
(gst_multiudpsink_init_send), (gst_multiudpsink_close),
(gst_multiudpsink_add), (gst_multiudpsink_remove),
(gst_multiudpsink_clear), (gst_multiudpsink_get_stats),
(gst_multiudpsink_change_state):
* gst/udp/gstmultiudpsink.h:
* gst/udp/gstudp-marshal.list:
* gst/udp/gstudp.c: (plugin_init):
* gst/udp/gstudp.h:
* gst/udp/gstudpsink.c: (gst_udpsink_get_type),
(gst_udpsink_base_init), (gst_udpsink_class_init),
(gst_udpsink_init), (gst_udpsink_set_uri),
(gst_udpsink_set_property), (gst_udpsink_get_property),
(gst_udpsink_uri_get_type), (gst_udpsink_uri_get_protocols),
(gst_udpsink_uri_get_uri), (gst_udpsink_uri_set_uri),
(gst_udpsink_uri_handler_init):
* gst/udp/gstudpsink.h:
* gst/udp/gstudpsrc.c: (gst_udpsrc_get_type),
(gst_udpsrc_base_init), (gst_udpsrc_class_init),
(gst_udpsrc_create), (gst_udpsrc_set_uri), (gst_udpsrc_start),
(gst_udpsrc_unlock), (gst_udpsrc_stop):
* gst/udp/gstudpsrc.h:
Added multifdsink to send UDP to multiple addresses.
Cleaned up UDP source/sink elements some more.
Make UDP sink extends from multiudpsink.
This commit is contained in:
Wim Taymans 2005-05-12 15:32:51 +00:00
parent 2d1475d582
commit 726c253c14
12 changed files with 875 additions and 226 deletions

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@ -1,3 +1,37 @@
2005-05-12 Wim Taymans <wim@fluendo.com>
* gst/udp/.cvsignore:
* gst/udp/Makefile.am:
* gst/udp/gstmultiudpsink.c: (gst_multiudpsink_get_type),
(gst_multiudpsink_base_init), (gst_multiudpsink_class_init),
(gst_multiudpsink_init), (gst_multiudpsink_finalize),
(gst_multiudpsink_get_times), (gst_multiudpsink_render),
(gst_multiudpsink_set_property), (gst_multiudpsink_get_property),
(gst_multiudpsink_init_send), (gst_multiudpsink_close),
(gst_multiudpsink_add), (gst_multiudpsink_remove),
(gst_multiudpsink_clear), (gst_multiudpsink_get_stats),
(gst_multiudpsink_change_state):
* gst/udp/gstmultiudpsink.h:
* gst/udp/gstudp-marshal.list:
* gst/udp/gstudp.c: (plugin_init):
* gst/udp/gstudp.h:
* gst/udp/gstudpsink.c: (gst_udpsink_get_type),
(gst_udpsink_base_init), (gst_udpsink_class_init),
(gst_udpsink_init), (gst_udpsink_set_uri),
(gst_udpsink_set_property), (gst_udpsink_get_property),
(gst_udpsink_uri_get_type), (gst_udpsink_uri_get_protocols),
(gst_udpsink_uri_get_uri), (gst_udpsink_uri_set_uri),
(gst_udpsink_uri_handler_init):
* gst/udp/gstudpsink.h:
* gst/udp/gstudpsrc.c: (gst_udpsrc_get_type),
(gst_udpsrc_base_init), (gst_udpsrc_class_init),
(gst_udpsrc_create), (gst_udpsrc_set_uri), (gst_udpsrc_start),
(gst_udpsrc_unlock), (gst_udpsrc_stop):
* gst/udp/gstudpsrc.h:
Added multifdsink to send UDP to multiple addresses.
Cleaned up UDP source/sink elements some more.
Make UDP sink extends from multiudpsink.
2005-05-12 Tim-Philipp Müller <tim at centricular dot net>
* ext/mad/gstmad.c: (gst_mad_src_query), (gst_mad_sink_event):

5
gst/udp/.gitignore vendored
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@ -5,3 +5,8 @@ Makefile.in
*.la
.deps
.libs
gstudp-enumtypes.c
gstudp-enumtypes.h
gstudp-marshal.c
gstudp-marshal.h

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@ -1,11 +1,28 @@
plugin_LTLIBRARIES = libgstudp.la
libgstudp_la_SOURCES = gstudp.c gstudpsrc.c gstudpsink.c
# variables used for enum/marshal generation
glib_enum_headers = gstudp.h
glib_enum_define = GST_UDP
glib_enum_prefix = gst_udp
include $(top_srcdir)/common/glib-gen.mak
built_sources = gstudp-enumtypes.c gstudp-marshal.c
built_headers = gstudp-enumtypes.h gstudp-marshal.h
BUILT_SOURCES = $(built_sources) $(built_headers)
libgstudp_la_SOURCES = gstudp.c gstudpsrc.c gstudpsink.c gstmultiudpsink.c
libgstudp_la_CFLAGS = $(GST_CFLAGS)
libgstudp_la_LIBADD =
libgstudp_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) $(GST_BASE_LIBS)
noinst_HEADERS = gstudpsink.h gstudpsrc.h gstudp.h
nodist_libgstudp_la_SOURCES = \
$(built_sources)
noinst_HEADERS = gstudpsink.h gstudpsrc.h gstudp.h gstmultiudpsink.h
EXTRA_DIST = README gstudp-marshal.list
CLEANFILES = $(BUILT_SOURCES)
EXTRA_DIST = README

437
gst/udp/gstmultiudpsink.c Normal file
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@ -0,0 +1,437 @@
/* GStreamer
* Copyright (C) <2005> Wim Taymans <wim@fluendo.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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstudp-marshal.h"
#include "gstmultiudpsink.h"
GST_DEBUG_CATEGORY (multiudpsink_debug);
#define GST_CAT_DEFAULT (multiudpsink_debug)
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
/* elementfactory information */
static GstElementDetails gst_multiudpsink_details =
GST_ELEMENT_DETAILS ("UDP packet sender",
"Sink/Network",
"Send data over the network via UDP",
"Wim Taymans <wim@fluendo.com>");
/* MultiUDPSink signals and args */
enum
{
/* methods */
SIGNAL_ADD,
SIGNAL_REMOVE,
SIGNAL_CLEAR,
SIGNAL_GET_STATS,
/* signals */
SIGNAL_CLIENT_ADDED,
SIGNAL_CLIENT_REMOVED,
/* FILL ME */
LAST_SIGNAL
};
enum
{
PROP_0,
/* FILL ME */
};
static void gst_multiudpsink_base_init (gpointer g_class);
static void gst_multiudpsink_class_init (GstMultiUDPSink * klass);
static void gst_multiudpsink_init (GstMultiUDPSink * udpsink);
static void gst_multiudpsink_finalize (GObject * object);
static void gst_multiudpsink_get_times (GstBaseSink * sink, GstBuffer * buffer,
GstClockTime * start, GstClockTime * end);
static GstFlowReturn gst_multiudpsink_render (GstBaseSink * sink,
GstBuffer * buffer);
static GstElementStateReturn gst_multiudpsink_change_state (GstElement *
element);
static void gst_multiudpsink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_multiudpsink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstElementClass *parent_class = NULL;
static guint gst_multiudpsink_signals[LAST_SIGNAL] = { 0 };
GType
gst_multiudpsink_get_type (void)
{
static GType multiudpsink_type = 0;
if (!multiudpsink_type) {
static const GTypeInfo multiudpsink_info = {
sizeof (GstMultiUDPSinkClass),
gst_multiudpsink_base_init,
NULL,
(GClassInitFunc) gst_multiudpsink_class_init,
NULL,
NULL,
sizeof (GstMultiUDPSink),
0,
(GInstanceInitFunc) gst_multiudpsink_init,
NULL
};
multiudpsink_type =
g_type_register_static (GST_TYPE_BASESINK, "GstMultiUDPSink",
&multiudpsink_info, 0);
}
return multiudpsink_type;
}
static void
gst_multiudpsink_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_set_details (element_class, &gst_multiudpsink_details);
}
static void
gst_multiudpsink_class_init (GstMultiUDPSink * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseSinkClass *gstbasesink_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbasesink_class = (GstBaseSinkClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_BASESINK);
gobject_class->set_property = gst_multiudpsink_set_property;
gobject_class->get_property = gst_multiudpsink_get_property;
gobject_class->finalize = gst_multiudpsink_finalize;
gst_multiudpsink_signals[SIGNAL_ADD] =
g_signal_new ("add", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstMultiUDPSinkClass, add),
NULL, NULL, gst_udp_marshal_VOID__STRING_INT, G_TYPE_NONE, 2,
G_TYPE_STRING, G_TYPE_INT);
gst_multiudpsink_signals[SIGNAL_REMOVE] =
g_signal_new ("remove", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstMultiUDPSinkClass, remove),
NULL, NULL, gst_udp_marshal_VOID__STRING_INT, G_TYPE_NONE, 2,
G_TYPE_STRING, G_TYPE_INT);
gst_multiudpsink_signals[SIGNAL_CLEAR] =
g_signal_new ("clear", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstMultiUDPSinkClass, clear),
NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
gst_multiudpsink_signals[SIGNAL_GET_STATS] =
g_signal_new ("get-stats", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstMultiUDPSinkClass, get_stats),
NULL, NULL, gst_udp_marshal_BOXED__STRING_INT, G_TYPE_VALUE_ARRAY, 2,
G_TYPE_STRING, G_TYPE_INT);
gst_multiudpsink_signals[SIGNAL_CLIENT_ADDED] =
g_signal_new ("client-added", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiUDPSinkClass, client_added),
NULL, NULL, gst_udp_marshal_VOID__STRING_INT, G_TYPE_NONE, 2,
G_TYPE_STRING, G_TYPE_INT);
gst_multiudpsink_signals[SIGNAL_CLIENT_REMOVED] =
g_signal_new ("client-removed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiUDPSinkClass,
client_removed), NULL, NULL, gst_udp_marshal_VOID__STRING_INT,
G_TYPE_NONE, 2, G_TYPE_STRING, G_TYPE_INT);
gstelement_class->change_state = gst_multiudpsink_change_state;
gstbasesink_class->get_times = gst_multiudpsink_get_times;
gstbasesink_class->render = gst_multiudpsink_render;
GST_DEBUG_CATEGORY_INIT (multiudpsink_debug, "multiudpsink", 0, "UDP sink");
}
static void
gst_multiudpsink_init (GstMultiUDPSink * sink)
{
sink->client_lock = g_mutex_new ();
}
static void
gst_multiudpsink_finalize (GObject * object)
{
GstMultiUDPSink *sink;
sink = GST_MULTIUDPSINK (object);
g_mutex_free (sink->client_lock);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_multiudpsink_get_times (GstBaseSink * sink, GstBuffer * buffer,
GstClockTime * start, GstClockTime * end)
{
*start = GST_BUFFER_TIMESTAMP (buffer);
*end = *start + GST_BUFFER_DURATION (buffer);
}
static GstFlowReturn
gst_multiudpsink_render (GstBaseSink * bsink, GstBuffer * buffer)
{
GstMultiUDPSink *sink;
gint ret, size;
guint8 *data;
GList *clients;
sink = GST_MULTIUDPSINK (bsink);
size = GST_BUFFER_SIZE (buffer);
data = GST_BUFFER_DATA (buffer);
GST_DEBUG ("about to send %d bytes", size);
g_mutex_lock (sink->client_lock);
for (clients = sink->clients; clients; clients = g_list_next (clients)) {
GstUDPClient *client;
client = (GstUDPClient *) clients->data;
GST_DEBUG ("sending %d bytes to client %p", size, client);
while (TRUE) {
ret = sendto (*client->sock, data, size, 0,
(struct sockaddr *) &client->theiraddr, sizeof (client->theiraddr));
if (ret < 0) {
if (errno != EINTR && errno != EAGAIN) {
goto send_error;
}
} else
break;
}
}
g_mutex_unlock (sink->client_lock);
GST_DEBUG ("sent %d bytes", size);
return GST_FLOW_OK;
send_error:
{
g_mutex_unlock (sink->client_lock);
GST_DEBUG ("got send error %s (%d)", g_strerror (errno), errno);
return GST_FLOW_ERROR;
}
}
static void
gst_multiudpsink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstMultiUDPSink *udpsink;
udpsink = GST_MULTIUDPSINK (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_multiudpsink_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstMultiUDPSink *udpsink;
udpsink = GST_MULTIUDPSINK (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* create a socket for sending to remote machine */
static gboolean
gst_multiudpsink_init_send (GstMultiUDPSink * sink)
{
guint bc_val;
gint ret;
/* create sender socket */
if ((sink->sock = socket (AF_INET, SOCK_DGRAM, 0)) == -1)
goto no_socket;
bc_val = 1;
if ((ret =
setsockopt (sink->sock, SOL_SOCKET, SO_BROADCAST, &bc_val,
sizeof (bc_val))) < 0)
goto no_broadcast;
return TRUE;
/* ERRORS */
no_socket:
{
perror ("socket");
return FALSE;
}
no_broadcast:
{
perror ("setsockopt");
return FALSE;
}
}
static void
gst_multiudpsink_close (GstMultiUDPSink * sink)
{
close (sink->sock);
}
void
gst_multiudpsink_add (GstMultiUDPSink * sink, const gchar * host, gint port)
{
struct hostent *he;
struct in_addr addr;
struct ip_mreq multi_addr;
GstUDPClient *client;
client = g_new0 (GstUDPClient, 1);
client->host = g_strdup (host);
client->port = port;
client->sock = &sink->sock;
memset (&client->theiraddr, 0, sizeof (client->theiraddr));
client->theiraddr.sin_family = AF_INET; /* host byte order */
client->theiraddr.sin_port = htons (port); /* short, network byte order */
/* if its an IP address */
if (inet_aton (host, &addr)) {
/* check if its a multicast address */
if ((ntohl (addr.s_addr) & 0xe0000000) == 0xe0000000) {
client->multi_addr.imr_multiaddr.s_addr = addr.s_addr;
client->multi_addr.imr_interface.s_addr = INADDR_ANY;
client->theiraddr.sin_addr = multi_addr.imr_multiaddr;
/* Joining the multicast group */
/* FIXME, can we use multicast and unicast over the same
* socket? if not, search for socket of this multicast group or
* create a new one. */
setsockopt (sink->sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, &multi_addr,
sizeof (multi_addr));
} else {
client->theiraddr.sin_addr = *((struct in_addr *) &addr);
}
}
/* we dont need to lookup for localhost */
else if (strcmp (host, "localhost") == 0 && inet_aton ("127.0.0.1", &addr)) {
client->theiraddr.sin_addr = *((struct in_addr *) &addr);
}
/* if its a hostname */
else if ((he = gethostbyname (host))) {
client->theiraddr.sin_addr = *((struct in_addr *) he->h_addr);
} else {
goto host_error;
}
g_mutex_lock (sink->client_lock);
sink->clients = g_list_prepend (sink->clients, client);
g_mutex_unlock (sink->client_lock);
return;
/* ERRORS */
host_error:
{
GST_DEBUG ("hostname lookup error?");
g_free (client->host);
g_free (client);
return;
}
}
void
gst_multiudpsink_remove (GstMultiUDPSink * sink, const gchar * host, gint port)
{
}
void
gst_multiudpsink_clear (GstMultiUDPSink * sink)
{
}
GValueArray *
gst_multiudpsink_get_stats (GstMultiUDPSink * sink, const gchar * host,
gint port)
{
return NULL;
}
static GstElementStateReturn
gst_multiudpsink_change_state (GstElement * element)
{
GstElementStateReturn ret;
GstMultiUDPSink *sink;
gint transition;
sink = GST_MULTIUDPSINK (element);
transition = GST_STATE_TRANSITION (element);
switch (transition) {
case GST_STATE_READY_TO_PAUSED:
if (!gst_multiudpsink_init_send (sink))
goto no_init;
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element);
switch (transition) {
case GST_STATE_PAUSED_TO_READY:
gst_multiudpsink_close (sink);
break;
default:
break;
}
return ret;
/* ERRORS */
no_init:
{
return GST_STATE_FAILURE;
}
}

96
gst/udp/gstmultiudpsink.h Normal file
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@ -0,0 +1,96 @@
/* GStreamer
* Copyright (C) <2005> Wim Taymand <wim@fluendo.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.
*/
#ifndef __GST_MULTIUDPSINK_H__
#define __GST_MULTIUDPSINK_H__
#include <gst/gst.h>
#include <gst/base/gstbasesink.h>
G_BEGIN_DECLS
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/time.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netdb.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <arpa/inet.h>
#include "gstudp.h"
#define GST_TYPE_MULTIUDPSINK (gst_multiudpsink_get_type())
#define GST_MULTIUDPSINK(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MULTIUDPSINK,GstMultiUDPSink))
#define GST_MULTIUDPSINK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MULTIUDPSINK,GstMultiUDPSink))
#define GST_IS_MULTIUDPSINK(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MULTIUDPSINK))
#define GST_IS_MULTIUDPSINK_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MULTIUDPSINK))
typedef struct _GstMultiUDPSink GstMultiUDPSink;
typedef struct _GstMultiUDPSinkClass GstMultiUDPSinkClass;
typedef struct {
int *sock;
struct sockaddr_in theiraddr;
struct ip_mreq multi_addr;
gchar *host;
gint port;
} GstUDPClient;
/* sends udp packets to multiple host/port pairs.
*/
struct _GstMultiUDPSink {
GstBaseSink parent;
int sock;
GMutex *client_lock;
GList *clients;
};
struct _GstMultiUDPSinkClass {
GstBaseSinkClass parent_class;
/* element methods */
void (*add) (GstMultiUDPSink *sink, const gchar *host, gint port);
void (*remove) (GstMultiUDPSink *sink, const gchar *host, gint port);
void (*clear) (GstMultiUDPSink *sink);
GValueArray* (*get_stats) (GstMultiUDPSink *sink, const gchar *host, gint port);
/* signals */
void (*client_added) (GstElement *element, const gchar *host, gint port);
void (*client_removed) (GstElement *element, const gchar *host, gint port);
};
GType gst_multiudpsink_get_type(void);
void gst_multiudpsink_add (GstMultiUDPSink *sink, const gchar *host, gint port);
void gst_multiudpsink_remove (GstMultiUDPSink *sink, const gchar *host, gint port);
void gst_multiudpsink_clear (GstMultiUDPSink *sink);
GValueArray* gst_multiudpsink_get_stats (GstMultiUDPSink *sink, const gchar *host, gint port);
G_END_DECLS
#endif /* __GST_MULTIUDPSINK_H__ */

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@ -0,0 +1,2 @@
VOID:STRING,INT
BOXED:STRING,INT

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@ -22,6 +22,7 @@
#endif
#include "gstudpsrc.h"
#include "gstmultiudpsink.h"
#include "gstudpsink.h"
static gboolean
@ -31,6 +32,10 @@ plugin_init (GstPlugin * plugin)
GST_TYPE_UDPSINK))
return FALSE;
if (!gst_element_register (plugin, "multiudpsink", GST_RANK_NONE,
GST_TYPE_MULTIUDPSINK))
return FALSE;
if (!gst_element_register (plugin, "udpsrc", GST_RANK_NONE, GST_TYPE_UDPSRC))
return FALSE;

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@ -17,26 +17,23 @@
* Boston, MA 02111-1307, USA.
*/
#include "gstudp-enumtypes.h"
#include <glib.h>
#ifndef __GST_UDP_H__
#define __GST_UDP_H__
#ifdef __cplusplus
extern "C"
G_BEGIN_DECLS
typedef enum
{
#endif /* __cplusplus */
CONTROL_ZERO,
CONTROL_NONE,
CONTROL_UDP,
CONTROL_TCP
} GstUDPControl;
typedef enum
{
CONTROL_ZERO,
CONTROL_NONE,
CONTROL_UDP,
CONTROL_TCP
} Gst_UDP_Control;
#ifdef __cplusplus
}
#endif /* __cplusplus */
G_END_DECLS
#endif /* __GST_UDP_H__ */

View file

@ -1,5 +1,5 @@
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2005> Wim Taymans <wim@fluendo.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
@ -17,7 +17,6 @@
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
@ -26,17 +25,12 @@
#define UDP_DEFAULT_HOST "localhost"
#define UDP_DEFAULT_PORT 4951
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
/* elementfactory information */
static GstElementDetails gst_udpsink_details =
GST_ELEMENT_DETAILS ("UDP packet sender",
"Sink/Network",
"Send data over the network via UDP",
"Wim Taymans <wim.taymans@chello.be>");
"Wim Taymans <wim@fluendo.com>");
/* UDPSink signals and args */
enum
@ -47,9 +41,10 @@ enum
enum
{
ARG_0,
ARG_HOST,
ARG_PORT,
PROP_0,
PROP_HOST,
PROP_PORT,
PROP_URI,
/* FILL ME */
};
@ -57,12 +52,6 @@ static void gst_udpsink_base_init (gpointer g_class);
static void gst_udpsink_class_init (GstUDPSink * klass);
static void gst_udpsink_init (GstUDPSink * udpsink);
static void gst_udpsink_get_times (GstBaseSink * sink, GstBuffer * buffer,
GstClockTime * start, GstClockTime * end);
static GstFlowReturn gst_udpsink_render (GstBaseSink * sink,
GstBuffer * buffer);
static GstElementStateReturn gst_udpsink_change_state (GstElement * element);
static void gst_udpsink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_udpsink_get_property (GObject * object, guint prop_id,
@ -92,8 +81,8 @@ gst_udpsink_get_type (void)
};
udpsink_type =
g_type_register_static (GST_TYPE_BASESINK, "GstUDPSink", &udpsink_info,
0);
g_type_register_static (GST_TYPE_MULTIUDPSINK, "GstUDPSink",
&udpsink_info, 0);
}
return udpsink_type;
}
@ -103,9 +92,6 @@ gst_udpsink_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_set_details (element_class, &gst_udpsink_details);
}
@ -120,23 +106,18 @@ gst_udpsink_class_init (GstUDPSink * klass)
gstelement_class = (GstElementClass *) klass;
gstbasesink_class = (GstBaseSinkClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_BASESINK);
parent_class = g_type_class_ref (GST_TYPE_MULTIUDPSINK);
gobject_class->set_property = gst_udpsink_set_property;
gobject_class->get_property = gst_udpsink_get_property;
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_HOST,
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_HOST,
g_param_spec_string ("host", "host",
"The host/IP/Multicast group to send the packets to",
UDP_DEFAULT_HOST, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PORT,
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PORT,
g_param_spec_int ("port", "port", "The port to send the packets to",
0, 32768, UDP_DEFAULT_PORT, G_PARAM_READWRITE));
gstelement_class->change_state = gst_udpsink_change_state;
gstbasesink_class->get_times = gst_udpsink_get_times;
gstbasesink_class->render = gst_udpsink_render;
}
@ -145,45 +126,14 @@ gst_udpsink_init (GstUDPSink * udpsink)
{
udpsink->host = g_strdup (UDP_DEFAULT_HOST);
udpsink->port = UDP_DEFAULT_PORT;
gst_multiudpsink_add (GST_MULTIUDPSINK (udpsink), udpsink->host,
udpsink->port);
}
static void
gst_udpsink_get_times (GstBaseSink * sink, GstBuffer * buffer,
GstClockTime * start, GstClockTime * end)
static gboolean
gst_udpsink_set_uri (GstUDPSink * sink, const gchar * uri)
{
*start = GST_BUFFER_TIMESTAMP (buffer);
*end = *start + GST_BUFFER_DURATION (buffer);
}
static GstFlowReturn
gst_udpsink_render (GstBaseSink * sink, GstBuffer * buffer)
{
GstUDPSink *udpsink;
gint ret, size;
guint8 *data;
udpsink = GST_UDPSINK (sink);
size = GST_BUFFER_SIZE (buffer);
data = GST_BUFFER_DATA (buffer);
while (TRUE) {
ret = sendto (udpsink->sock, data, size, 0,
(struct sockaddr *) &udpsink->theiraddr, sizeof (udpsink->theiraddr));
if (ret < 0) {
if (errno != EINTR && errno != EAGAIN)
goto send_error;
} else
break;
}
return GST_FLOW_OK;
send_error:
{
GST_DEBUG ("got send error");
return GST_FLOW_ERROR;
}
return FALSE;
}
static void
@ -194,21 +144,25 @@ gst_udpsink_set_property (GObject * object, guint prop_id, const GValue * value,
udpsink = GST_UDPSINK (object);
/* remove old host */
gst_multiudpsink_remove (GST_MULTIUDPSINK (udpsink),
udpsink->host, udpsink->port);
switch (prop_id) {
case ARG_HOST:
if (udpsink->host != NULL)
g_free (udpsink->host);
if (g_value_get_string (value) == NULL)
udpsink->host = NULL;
else
udpsink->host = g_strdup (g_value_get_string (value));
case PROP_HOST:
g_free (udpsink->host);
udpsink->host = g_value_dup_string (value);
break;
case ARG_PORT:
case PROP_PORT:
udpsink->port = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
/* add new host */
gst_multiudpsink_add (GST_MULTIUDPSINK (udpsink),
udpsink->host, udpsink->port);
}
static void
@ -220,10 +174,10 @@ gst_udpsink_get_property (GObject * object, guint prop_id, GValue * value,
udpsink = GST_UDPSINK (object);
switch (prop_id) {
case ARG_HOST:
case PROP_HOST:
g_value_set_string (value, udpsink->host);
break;
case ARG_PORT:
case PROP_PORT:
g_value_set_int (value, udpsink->port);
break;
default:
@ -232,104 +186,47 @@ gst_udpsink_get_property (GObject * object, guint prop_id, GValue * value,
}
}
/*** GSTURIHANDLER INTERFACE *************************************************/
/* create a socket for sending to remote machine */
static gboolean
gst_udpsink_init_send (GstUDPSink * sink)
static guint
gst_udpsink_uri_get_type (void)
{
struct hostent *he;
struct in_addr addr;
guint bc_val;
return GST_URI_SINK;
}
static gchar **
gst_udpsink_uri_get_protocols (void)
{
static gchar *protocols[] = { "udp", NULL };
memset (&sink->theiraddr, 0, sizeof (sink->theiraddr));
sink->theiraddr.sin_family = AF_INET; /* host byte order */
sink->theiraddr.sin_port = htons (sink->port); /* short, network byte order */
return protocols;
}
/* if its an IP address */
if (inet_aton (sink->host, &addr)) {
/* check if its a multicast address */
if ((ntohl (addr.s_addr) & 0xe0000000) == 0xe0000000) {
sink->multi_addr.imr_multiaddr.s_addr = addr.s_addr;
sink->multi_addr.imr_interface.s_addr = INADDR_ANY;
static const gchar *
gst_udpsink_uri_get_uri (GstURIHandler * handler)
{
GstUDPSink *sink = GST_UDPSINK (handler);
sink->theiraddr.sin_addr = sink->multi_addr.imr_multiaddr;
return g_strdup (sink->uri);
}
/* Joining the multicast group */
setsockopt (sink->sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, &sink->multi_addr,
sizeof (sink->multi_addr));
}
static gboolean
gst_udpsink_uri_set_uri (GstURIHandler * handler, const gchar * uri)
{
gboolean ret;
GstUDPSink *sink = GST_UDPSINK (handler);
else {
sink->theiraddr.sin_addr = *((struct in_addr *) &addr);
}
}
ret = gst_udpsink_set_uri (sink, uri);
/* we dont need to lookup for localhost */
else if (strcmp (sink->host, UDP_DEFAULT_HOST) == 0 &&
inet_aton ("127.0.0.1", &addr)) {
sink->theiraddr.sin_addr = *((struct in_addr *) &addr);
}
/* if its a hostname */
else if ((he = gethostbyname (sink->host))) {
sink->theiraddr.sin_addr = *((struct in_addr *) he->h_addr);
}
else {
perror ("hostname lookup error?");
return FALSE;
}
if ((sink->sock = socket (AF_INET, SOCK_DGRAM, 0)) == -1) {
perror ("socket");
return FALSE;
}
bc_val = 1;
setsockopt (sink->sock, SOL_SOCKET, SO_BROADCAST, &bc_val, sizeof (bc_val));
return TRUE;
return ret;
}
static void
gst_udpsink_close (GstUDPSink * sink)
gst_udpsink_uri_handler_init (gpointer g_iface, gpointer iface_data)
{
close (sink->sock);
}
static GstElementStateReturn
gst_udpsink_change_state (GstElement * element)
{
GstElementStateReturn ret;
GstUDPSink *sink;
gint transition;
sink = GST_UDPSINK (element);
transition = GST_STATE_TRANSITION (element);
switch (transition) {
case GST_STATE_READY_TO_PAUSED:
if (!gst_udpsink_init_send (sink))
goto no_init;
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element);
switch (transition) {
case GST_STATE_PAUSED_TO_READY:
gst_udpsink_close (sink);
break;
default:
break;
}
return ret;
no_init:
{
return GST_STATE_FAILURE;
}
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
iface->get_type = gst_udpsink_uri_get_type;
iface->get_protocols = gst_udpsink_uri_get_protocols;
iface->get_uri = gst_udpsink_uri_get_uri;
iface->set_uri = gst_udpsink_uri_set_uri;
}

View file

@ -22,7 +22,7 @@
#define __GST_UDPSINK_H__
#include <gst/gst.h>
#include <gst/base/gstbasesink.h>
#include "gstmultiudpsink.h"
G_BEGIN_DECLS
@ -51,18 +51,15 @@ typedef struct _GstUDPSink GstUDPSink;
typedef struct _GstUDPSinkClass GstUDPSinkClass;
struct _GstUDPSink {
GstBaseSink parent;
int sock;
struct sockaddr_in theiraddr;
struct ip_mreq multi_addr;
GstMultiUDPSink parent;
gchar *uri;
gint port;
gchar *host;
};
struct _GstUDPSinkClass {
GstBaseSinkClass parent_class;
GstMultiUDPSinkClass parent_class;
};
GType gst_udpsink_get_type(void);

View file

@ -1,5 +1,5 @@
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2005> Wim Taymans <wim@fluendo.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
@ -24,6 +24,33 @@
#include "gstudpsrc.h"
#include <unistd.h>
#include <sys/ioctl.h>
#ifdef HAVE_FIONREAD_IN_SYS_FILIO
#include <sys/filio.h>
#endif
GST_DEBUG_CATEGORY (udpsrc_debug);
#define GST_CAT_DEFAULT (udpsrc_debug)
/* the select call is also performed on the control sockets, that way
* we can send special commands to unblock or restart the select call */
#define CONTROL_RESTART 'R' /* restart the select call */
#define CONTROL_STOP 'S' /* stop the select call */
#define CONTROL_SOCKETS(src) src->control_sock
#define WRITE_SOCKET(src) src->control_sock[1]
#define READ_SOCKET(src) src->control_sock[0]
#define SEND_COMMAND(src, command) \
G_STMT_START { \
unsigned char c; c = command; \
write (WRITE_SOCKET(src), &c, 1); \
} G_STMT_END
#define READ_COMMAND(src, command, res) \
G_STMT_START { \
res = read(READ_SOCKET(src), &command, 1); \
} G_STMT_END
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
@ -35,7 +62,7 @@ static GstElementDetails gst_udpsrc_details =
GST_ELEMENT_DETAILS ("UDP packet receiver",
"Source/Network",
"Receive data over the network via UDP",
"Wim Taymans <wim.taymans@chello.be>");
"Wim Taymans <wim@fluendo.com>");
/* UDPSrc signals and args */
enum
@ -66,6 +93,7 @@ static void gst_udpsrc_uri_handler_init (gpointer g_iface, gpointer iface_data);
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 void gst_udpsrc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
@ -153,7 +181,11 @@ gst_udpsrc_class_init (GstUDPSrc * klass)
gstbasesrc_class->start = gst_udpsrc_start;
gstbasesrc_class->stop = gst_udpsrc_stop;
gstbasesrc_class->unlock = gst_udpsrc_unlock;
gstpushsrc_class->create = gst_udpsrc_create;
GST_DEBUG_CATEGORY_INIT (udpsrc_debug, "udpsrc", 0, "UDP src");
}
static void
@ -172,30 +204,82 @@ gst_udpsrc_create (GstPushSrc * psrc, GstBuffer ** buf)
GstBuffer *outbuf;
struct sockaddr_in tmpaddr;
socklen_t len;
gint numbytes;
fd_set read_fds;
guint max_sock;
gchar *pktdata;
gint pktsize;
gint readsize;
gint ret;
gboolean try_again;
udpsrc = GST_UDPSRC (psrc);
FD_ZERO (&read_fds);
FD_SET (udpsrc->sock, &read_fds);
max_sock = udpsrc->sock;
FD_SET (READ_SOCKET (udpsrc), &read_fds);
max_sock = MAX (udpsrc->sock, READ_SOCKET (udpsrc));
/* FIXME, add another socket to unblock */
if (select (max_sock + 1, &read_fds, NULL, NULL, NULL) < 0)
goto select_error;
do {
gboolean stop;
pktdata = g_malloc (24000);
pktsize = 24000;
try_again = FALSE;
stop = FALSE;
GST_LOG_OBJECT (udpsrc, "doing select");
ret = select (max_sock + 1, &read_fds, NULL, NULL, NULL);
GST_LOG_OBJECT (udpsrc, "select returned %d", ret);
if (ret <= 0) {
if (errno != EAGAIN && errno != EINTR)
goto select_error;
else
try_again = TRUE;
} else {
/* got control message */
if (FD_ISSET (READ_SOCKET (udpsrc), &read_fds)) {
while (TRUE) {
gchar command;
int res;
READ_COMMAND (udpsrc, command, res);
if (res < 0) {
GST_LOG_OBJECT (udpsrc, "no more commands");
/* no more commands */
break;
}
switch (command) {
case CONTROL_STOP:
/* break out of the select loop */
GST_LOG_OBJECT (udpsrc, "stop");
/* stop this function */
stop = TRUE;
break;
default:
GST_WARNING_OBJECT (udpsrc, "unkown");
g_warning ("multiudpsink: unknown control message received");
break;
}
}
}
}
if (stop)
goto stopped;
} while (try_again);
/* ask how much is available for reading on the socket */
if ((ret = ioctl (udpsrc->sock, FIONREAD, &readsize)) < 0)
goto ioctl_failed;
GST_LOG_OBJECT (udpsrc, "ioctl says %d bytes available", readsize);
pktdata = g_malloc (readsize);
pktsize = readsize;
len = sizeof (struct sockaddr);
while (TRUE) {
numbytes = recvfrom (udpsrc->sock, pktdata, pktsize,
ret = recvfrom (udpsrc->sock, pktdata, pktsize,
0, (struct sockaddr *) &tmpaddr, &len);
if (numbytes < 0) {
if (ret < 0) {
if (errno != EAGAIN && errno != EINTR)
goto receive_error;
} else
@ -204,7 +288,7 @@ gst_udpsrc_create (GstPushSrc * psrc, GstBuffer ** buf)
outbuf = gst_buffer_new ();
GST_BUFFER_DATA (outbuf) = pktdata;
GST_BUFFER_SIZE (outbuf) = numbytes;
GST_BUFFER_SIZE (outbuf) = ret;
*buf = outbuf;
@ -212,13 +296,26 @@ gst_udpsrc_create (GstPushSrc * psrc, GstBuffer ** buf)
select_error:
{
GST_DEBUG ("got 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:
{
gst_buffer_unref (outbuf);
GST_DEBUG ("got receive error");
g_free (pktdata);
GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
("receive error %d: %s (%d)", ret, g_strerror (errno), errno));
return GST_FLOW_ERROR;
}
}
@ -250,7 +347,8 @@ gst_udpsrc_set_uri (GstUDPSrc * src, const gchar * uri)
wrong_protocol:
{
g_free (protocol);
GST_DEBUG ("error parsing uri %s", uri);
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("error parsing uri %s: wrong protocol", uri));
return FALSE;
}
}
@ -313,39 +411,53 @@ static gboolean
gst_udpsrc_start (GstBaseSrc * bsrc)
{
guint bc_val;
gint reuse = 1;
gint reuse;
struct sockaddr_in my_addr;
int len, port;
GstUDPSrc *src;
gint ret;
src = GST_UDPSRC (bsrc);
if ((ret = socketpair (PF_UNIX, SOCK_STREAM, 0, CONTROL_SOCKETS (src))) < 0)
goto no_socket_pair;
fcntl (READ_SOCKET (src), F_SETFL, O_NONBLOCK);
fcntl (WRITE_SOCKET (src), F_SETFL, O_NONBLOCK);
if ((ret = socket (AF_INET, SOCK_DGRAM, 0)) < 0)
goto no_socket;
src->sock = ret;
reuse = 1;
if ((ret =
setsockopt (src->sock, SOL_SOCKET, SO_REUSEADDR, &reuse,
sizeof (reuse))) < 0)
goto setsockopt_error;
memset (&src->myaddr, 0, sizeof (src->myaddr));
src->myaddr.sin_family = AF_INET; /* host byte order */
src->myaddr.sin_port = htons (src->port); /* short, network byte order */
src->myaddr.sin_addr.s_addr = INADDR_ANY;
if ((src->sock = socket (AF_INET, SOCK_DGRAM, 0)) < 0)
goto no_socket;
if (setsockopt (src->sock, SOL_SOCKET, SO_REUSEADDR, &reuse,
sizeof (reuse)) < 0)
goto setsockopt_error;
if (bind (src->sock, (struct sockaddr *) &src->myaddr,
sizeof (src->myaddr)) < 0)
if ((ret =
bind (src->sock, (struct sockaddr *) &src->myaddr,
sizeof (src->myaddr))) < 0)
goto bind_error;
if (inet_aton (src->multi_group, &(src->multi_addr.imr_multiaddr))) {
if (src->multi_addr.imr_multiaddr.s_addr) {
src->multi_addr.imr_interface.s_addr = INADDR_ANY;
setsockopt (src->sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, &src->multi_addr,
sizeof (src->multi_addr));
if ((ret =
setsockopt (src->sock, IPPROTO_IP, IP_ADD_MEMBERSHIP,
&src->multi_addr, sizeof (src->multi_addr))) < 0)
goto membership;
}
}
len = sizeof (my_addr);
if (getsockname (src->sock, (struct sockaddr *) &my_addr, &len) < 0)
if ((ret = getsockname (src->sock, (struct sockaddr *) &my_addr, &len)) < 0)
goto getsockname_error;
port = ntohs (my_addr.sin_port);
@ -355,32 +467,82 @@ gst_udpsrc_start (GstBaseSrc * bsrc)
}
bc_val = 1;
setsockopt (src->sock, SOL_SOCKET, SO_BROADCAST, &bc_val, sizeof (bc_val));
if ((ret =
setsockopt (src->sock, SOL_SOCKET, SO_BROADCAST, &bc_val,
sizeof (bc_val))) < 0)
goto no_broadcast;
src->myaddr.sin_port = htons (src->port + 1);
return TRUE;
/* ERRORS */
no_socket_pair:
{
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ_WRITE, (NULL),
("no socket pair %d: %s (%d)", ret, g_strerror (errno), errno));
return FALSE;
}
no_socket:
{
GST_DEBUG ("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:
{
GST_DEBUG ("setsockopt failed");
close (src->sock);
src->sock = -1;
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("setsockopt failed %d: %s (%d)", ret, g_strerror (errno), errno));
return FALSE;
}
bind_error:
{
GST_DEBUG ("bind failed");
close (src->sock);
src->sock = -1;
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("bind failed %d: %s (%d)", ret, g_strerror (errno), errno));
return FALSE;
}
membership:
{
close (src->sock);
src->sock = -1;
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("could add membership %d: %s (%d)", ret, g_strerror (errno), errno));
return FALSE;
}
getsockname_error:
{
GST_DEBUG ("getsockname failed");
close (src->sock);
src->sock = -1;
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("getsockname failed %d: %s (%d)", ret, g_strerror (errno), errno));
return FALSE;
}
no_broadcast:
{
close (src->sock);
src->sock = -1;
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("could not configure socket for broadcast %d: %s (%d)", ret,
g_strerror (errno), errno));
return FALSE;
}
}
static gboolean
gst_udpsrc_unlock (GstBaseSrc * bsrc)
{
GstUDPSrc *src;
src = GST_UDPSRC (bsrc);
GST_DEBUG ("sending stop command");
SEND_COMMAND (src, CONTROL_STOP);
return TRUE;
}
static gboolean

View file

@ -56,12 +56,12 @@ struct _GstUDPSrc {
gchar *uri;
int port;
int sock;
gchar *multi_group;
gboolean multicast;
gint ttl;
int control;
int sock;
int control_sock[2];
struct sockaddr_in myaddr;
struct ip_mreq multi_addr;