gstreamer/gst/udp/gstudpsrc.c

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/* Gnome-Streamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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.
*/
#include "gstudpsrc.h"
#define UDP_DEFAULT_PORT 4951
/* elementfactory information */
GstElementDetails gst_udpsrc_details = {
"UDP packet receiver",
"Transport/",
"",
VERSION,
"Wim Taymans <wim.taymans@chello.be>",
"(C) 2001",
};
/* UDPSrc signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_PORT,
/* FILL ME */
};
static void gst_udpsrc_class_init (GstUDPSrc *klass);
static void gst_udpsrc_init (GstUDPSrc *udpsrc);
static GstBuffer* gst_udpsrc_get (GstPad *pad);
static GstElementStateReturn
gst_udpsrc_change_state (GstElement *element);
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 GstElementClass *parent_class = NULL;
//static guint gst_udpsrc_signals[LAST_SIGNAL] = { 0 };
GType
gst_udpsrc_get_type (void)
{
static GType udpsrc_type = 0;
if (!udpsrc_type) {
static const GTypeInfo udpsrc_info = {
sizeof(GstUDPSrcClass),
NULL,
NULL,
(GClassInitFunc)gst_udpsrc_class_init,
NULL,
NULL,
sizeof(GstUDPSrc),
0,
(GInstanceInitFunc)gst_udpsrc_init,
NULL
};
udpsrc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstUDPSrc", &udpsrc_info, 0);
}
return udpsrc_type;
}
static void
gst_udpsrc_class_init (GstUDPSrc *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*) klass;
gstelement_class = (GstElementClass*) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PORT,
g_param_spec_int ("port", "port", "The port to receive the packets from",
0, 32768, UDP_DEFAULT_PORT, G_PARAM_READWRITE));
gobject_class->set_property = gst_udpsrc_set_property;
gobject_class->get_property = gst_udpsrc_get_property;
gstelement_class->change_state = gst_udpsrc_change_state;
}
static void
gst_udpsrc_init (GstUDPSrc *udpsrc)
{
/* create the src and src pads */
udpsrc->srcpad = gst_pad_new ("src", GST_PAD_SRC);
gst_element_add_pad (GST_ELEMENT (udpsrc), udpsrc->srcpad);
gst_pad_set_get_function (udpsrc->srcpad, gst_udpsrc_get);
udpsrc->port = UDP_DEFAULT_PORT;
}
static GstBuffer*
gst_udpsrc_get (GstPad *pad)
{
GstUDPSrc *udpsrc;
GstBuffer *outbuf;
struct sockaddr_in tmpaddr;
int len, numbytes;
fd_set read_fds;
g_return_val_if_fail (pad != NULL, NULL);
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
udpsrc = GST_UDPSRC (GST_OBJECT_PARENT (pad));
FD_ZERO (&read_fds);
FD_SET (udpsrc->control_sock, &read_fds);
FD_SET (udpsrc->sock, &read_fds);
if (select (udpsrc->control_sock+1, &read_fds, NULL, NULL, NULL) > 0) {
if (FD_ISSET (udpsrc->control_sock, &read_fds)) {
#ifndef GST_DISABLE_LOADSAVE
guchar *buf;
int ret;
int fdread;
struct sockaddr addr;
socklen_t len;
xmlDocPtr doc;
GstCaps *caps;
buf = g_malloc (1024*10);
len = sizeof (struct sockaddr);
fdread = accept (udpsrc->control_sock, &addr, &len);
if (fdread < 0) {
perror ("accept");
}
ret = read (fdread, buf, 1024*10);
if (ret < 0) {
perror ("read");
}
buf[ret] = '\0';
doc = xmlParseMemory(buf, ret);
caps = gst_caps_load_thyself(doc->xmlRootNode);
gst_pad_try_set_caps (udpsrc->srcpad, caps);
#endif
outbuf = NULL;
}
else {
outbuf = gst_buffer_new ();
GST_BUFFER_DATA (outbuf) = g_malloc (24000);
GST_BUFFER_SIZE (outbuf) = 24000;
numbytes = recvfrom (udpsrc->sock, GST_BUFFER_DATA (outbuf),
GST_BUFFER_SIZE (outbuf), 0, (struct sockaddr *)&tmpaddr, &len);
if (numbytes != -1) {
GST_BUFFER_SIZE (outbuf) = numbytes;
}
else {
perror ("recvfrom");
gst_buffer_unref (outbuf);
outbuf = NULL;
}
}
}
else {
perror ("select");
outbuf = NULL;
}
return outbuf;
}
static void
gst_udpsrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstUDPSrc *udpsrc;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_UDPSRC(object));
udpsrc = GST_UDPSRC(object);
switch (prop_id) {
case ARG_PORT:
udpsrc->port = g_value_get_int (value);
break;
default:
break;
}
}
static void
gst_udpsrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstUDPSrc *udpsrc;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_UDPSRC(object));
udpsrc = GST_UDPSRC(object);
switch (prop_id) {
case ARG_PORT:
g_value_set_int (value, udpsrc->port);
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_init_receive (GstUDPSrc *src)
{
bzero (&src->myaddr, 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)) == -1) {
perror("socket");
return FALSE;
}
if (bind (src->sock, (struct sockaddr *) &src->myaddr, sizeof (src->myaddr)) == -1) {
perror("bind");
return FALSE;
}
if ((src->control_sock = socket (AF_INET, SOCK_STREAM, 0)) == -1) {
perror("control_socket");
return FALSE;
}
if (bind (src->control_sock, (struct sockaddr *) &src->myaddr, sizeof (src->myaddr)) == -1) {
perror("control_bind");
return FALSE;
}
if (listen (src->control_sock, 5) == -1) {
perror("listen");
return FALSE;
}
fcntl (src->control_sock, F_SETFL, O_NONBLOCK);
GST_FLAG_SET (src, GST_UDPSRC_OPEN);
return TRUE;
}
static void
gst_udpsrc_close (GstUDPSrc *src)
{
close (src->sock);
GST_FLAG_UNSET (src, GST_UDPSRC_OPEN);
}
static GstElementStateReturn
gst_udpsrc_change_state (GstElement *element)
{
g_return_val_if_fail (GST_IS_UDPSRC (element), GST_STATE_FAILURE);
if (GST_STATE_PENDING (element) == GST_STATE_NULL) {
if (GST_FLAG_IS_SET (element, GST_UDPSRC_OPEN))
gst_udpsrc_close (GST_UDPSRC (element));
} else {
if (!GST_FLAG_IS_SET (element, GST_UDPSRC_OPEN)) {
if (!gst_udpsrc_init_receive (GST_UDPSRC (element)))
return GST_STATE_FAILURE;
}
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}