gstreamer/gst/tcp/gsttcpsrc.c

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/* GStreamer
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gsttcpsrc.h"
#include <unistd.h>
#define TCP_DEFAULT_PORT 4953
/* elementfactory information */
static GstElementDetails gst_tcpsrc_details =
GST_ELEMENT_DETAILS ("TCP packet receiver",
"Source/Network",
"Receive data over the network via TCP",
"Zeeshan Ali <zak147@yahoo.com>");
/* TCPSrc signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_PORT,
ARG_CONTROL
/* ARG_SOCKET_OPTIONS,*/
/* FILL ME */
};
#define GST_TYPE_TCPSRC_CONTROL (gst_tcpsrc_control_get_type())
static GType
gst_tcpsrc_control_get_type (void)
{
static GType tcpsrc_control_type = 0;
static GEnumValue tcpsrc_control[] = {
{CONTROL_NONE, "1", "none"},
{CONTROL_TCP, "2", "tcp"},
{CONTROL_ZERO, NULL, NULL}
};
if (!tcpsrc_control_type) {
tcpsrc_control_type =
g_enum_register_static ("GstTCPSrcControl", tcpsrc_control);
}
return tcpsrc_control_type;
}
static void gst_tcpsrc_base_init (gpointer g_class);
static void gst_tcpsrc_class_init (GstTCPSrc * klass);
static void gst_tcpsrc_init (GstTCPSrc * tcpsrc);
static GstData *gst_tcpsrc_get (GstPad * pad);
static GstElementStateReturn gst_tcpsrc_change_state (GstElement * element);
static void gst_tcpsrc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_tcpsrc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_tcpsrc_set_clock (GstElement * element, GstClock * clock);
static GstElementClass *parent_class = NULL;
/*static guint gst_tcpsrc_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_tcpsrc_get_type (void)
{
static GType tcpsrc_type = 0;
if (!tcpsrc_type) {
static const GTypeInfo tcpsrc_info = {
sizeof (GstTCPSrcClass),
gst_tcpsrc_base_init,
NULL,
(GClassInitFunc) gst_tcpsrc_class_init,
NULL,
NULL,
sizeof (GstTCPSrc),
0,
(GInstanceInitFunc) gst_tcpsrc_init,
NULL
};
tcpsrc_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstTCPSrc", &tcpsrc_info, 0);
}
return tcpsrc_type;
}
static void
gst_tcpsrc_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_tcpsrc_details);
}
static void
gst_tcpsrc_class_init (GstTCPSrc * 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, TCP_DEFAULT_PORT, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_CONTROL,
g_param_spec_enum ("control", "control", "The type of control",
GST_TYPE_TCPSRC_CONTROL, CONTROL_TCP, G_PARAM_READWRITE));
/*
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SOCKET_OPTIONS,
g_param_spec_boolean ("socketop", "socketop", "Enable or disable socket options REUSEADDR and KEEPALIVE",
FALSE, G_PARAM_READWRITE));
*/
gobject_class->set_property = gst_tcpsrc_set_property;
gobject_class->get_property = gst_tcpsrc_get_property;
gstelement_class->change_state = gst_tcpsrc_change_state;
gstelement_class->set_clock = gst_tcpsrc_set_clock;
}
static void
gst_tcpsrc_set_clock (GstElement * element, GstClock * clock)
{
GstTCPSrc *tcpsrc;
tcpsrc = GST_TCPSRC (element);
tcpsrc->clock = clock;
}
static void
gst_tcpsrc_init (GstTCPSrc * tcpsrc)
{
/* create the src and src pads */
tcpsrc->srcpad = gst_pad_new ("src", GST_PAD_SRC);
gst_element_add_pad (GST_ELEMENT (tcpsrc), tcpsrc->srcpad);
gst_pad_set_get_function (tcpsrc->srcpad, gst_tcpsrc_get);
tcpsrc->port = TCP_DEFAULT_PORT;
tcpsrc->control = CONTROL_TCP;
tcpsrc->clock = NULL;
tcpsrc->sock = -1;
tcpsrc->control_sock = -1;
tcpsrc->client_sock = -1;
/*tcpsrc->socket_options = FALSE; */
GST_FLAG_UNSET (tcpsrc, GST_TCPSRC_OPEN);
GST_FLAG_SET (tcpsrc, GST_TCPSRC_1ST_BUF);
GST_FLAG_UNSET (tcpsrc, GST_TCPSRC_CONNECTED);
}
static GstData *
gst_tcpsrc_get (GstPad * pad)
{
GstTCPSrc *tcpsrc;
GstBuffer *outbuf;
socklen_t len;
gint numbytes;
fd_set read_fds;
guint max_sock;
#ifndef GST_DISABLE_LOADSAVE
int ret, client_sock;
#endif
struct sockaddr client_addr;
g_return_val_if_fail (pad != NULL, NULL);
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
tcpsrc = GST_TCPSRC (GST_OBJECT_PARENT (pad));
FD_ZERO (&read_fds);
FD_SET (tcpsrc->sock, &read_fds);
max_sock = tcpsrc->sock;
if (tcpsrc->control_sock >= 0) {
FD_SET (tcpsrc->control_sock, &read_fds);
max_sock = MAX (tcpsrc->sock, tcpsrc->control_sock);
}
/* Add to FD_SET client socket, when connection has been established */
if (tcpsrc->client_sock >= 0) {
FD_SET (tcpsrc->client_sock, &read_fds);
max_sock = MAX (tcpsrc->client_sock, max_sock);
}
if (select (max_sock + 1, &read_fds, NULL, NULL, NULL) > 0) {
if ((tcpsrc->control_sock != -1)
&& FD_ISSET (tcpsrc->control_sock, &read_fds)) {
guchar *buf = NULL;
#ifndef GST_DISABLE_LOADSAVE
xmlDocPtr doc;
GstCaps *caps;
#endif
switch (tcpsrc->control) {
case CONTROL_TCP:
#ifndef GST_DISABLE_LOADSAVE
buf = g_malloc (1024 * 10);
len = sizeof (struct sockaddr);
client_sock = accept (tcpsrc->control_sock, &client_addr, &len);
if (client_sock <= 0) {
perror ("control_sock accept");
}
else if ((ret = read (client_sock, buf, 1024 * 10)) <= 0) {
perror ("control_sock read");
}
else {
buf[ret] = '\0';
doc = xmlParseMemory (buf, ret);
caps = gst_caps_load_thyself (doc->xmlRootNode);
/* foward the connect, we don't signal back the result here... */
gst_pad_try_set_caps (tcpsrc->srcpad, caps);
}
g_free (buf);
#endif
break;
case CONTROL_NONE:
default:
g_free (buf);
return NULL;
break;
}
outbuf = NULL;
} else {
outbuf = gst_buffer_new ();
GST_BUFFER_DATA (outbuf) = g_malloc (24000);
GST_BUFFER_SIZE (outbuf) = 24000;
if (GST_FLAG_IS_SET (tcpsrc, GST_TCPSRC_1ST_BUF)) {
if (tcpsrc->clock) {
GstClockTime current_time;
GstEvent *discont;
current_time = gst_clock_get_time (tcpsrc->clock);
GST_BUFFER_TIMESTAMP (outbuf) = current_time;
discont = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME,
current_time, NULL);
gst_pad_push (tcpsrc->srcpad, GST_DATA (discont));
}
GST_FLAG_UNSET (tcpsrc, GST_TCPSRC_1ST_BUF);
}
else {
GST_BUFFER_TIMESTAMP (outbuf) = GST_CLOCK_TIME_NONE;
}
if (!GST_FLAG_IS_SET (tcpsrc, GST_TCPSRC_CONNECTED)) {
tcpsrc->client_sock = accept (tcpsrc->sock, &client_addr, &len);
if (tcpsrc->client_sock <= 0) {
perror ("accept");
}
else {
GST_FLAG_SET (tcpsrc, GST_TCPSRC_CONNECTED);
}
}
numbytes =
read (tcpsrc->client_sock, GST_BUFFER_DATA (outbuf),
GST_BUFFER_SIZE (outbuf));
if (numbytes > 0) {
GST_BUFFER_SIZE (outbuf) = numbytes;
}
else {
if (numbytes == -1) {
perror ("read");
} else
g_print ("End of Stream reached\n");
gst_buffer_unref (outbuf);
outbuf = NULL;
close (tcpsrc->client_sock);
tcpsrc->client_sock = -1;
GST_FLAG_UNSET (tcpsrc, GST_TCPSRC_CONNECTED);
}
}
}
else {
perror ("select");
outbuf = NULL;
}
return GST_DATA (outbuf);
}
static void
gst_tcpsrc_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstTCPSrc *tcpsrc;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_TCPSRC (object));
tcpsrc = GST_TCPSRC (object);
switch (prop_id) {
case ARG_PORT:
tcpsrc->port = g_value_get_int (value);
break;
case ARG_CONTROL:
tcpsrc->control = g_value_get_enum (value);
break;
/* case ARG_SOCKET_OPTIONS:
tcpsrc->socket_options = g_value_get_boolean(value);
break; */
default:
break;
}
}
static void
gst_tcpsrc_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstTCPSrc *tcpsrc;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_TCPSRC (object));
tcpsrc = GST_TCPSRC (object);
switch (prop_id) {
case ARG_PORT:
g_value_set_int (value, tcpsrc->port);
break;
case ARG_CONTROL:
g_value_set_enum (value, tcpsrc->control);
break;
/* case ARG_SOCKET_OPTIONS:
g_value_set_boolean(value,tcpsrc->socket_options);
break;*/
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* create a socket for sending to remote machine */
static gboolean
gst_tcpsrc_init_receive (GstTCPSrc * src)
{
guint val = 0;
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_STREAM, 0)) == -1) {
perror ("stream_socket");
return FALSE;
}
/* if (src->socket_options)
{*/
g_print ("Socket Options SO_REUSEADDR, SO_KEEPALIVE\n");
/* Sock Options */
val = 1;
/* allow local address reuse */
if (setsockopt (src->sock, SOL_SOCKET, SO_REUSEADDR, &val, sizeof (int)) < 0)
perror ("setsockopt()");
val = 1;
/* periodically test if connection still alive */
if (setsockopt (src->sock, SOL_SOCKET, SO_KEEPALIVE, &val, sizeof (int)) < 0)
perror ("setsockopt()");
/* Sock Options */
/* } */
if (bind (src->sock, (struct sockaddr *) &src->myaddr,
sizeof (src->myaddr)) == -1) {
perror ("stream_sock bind");
return FALSE;
}
if (listen (src->sock, 5) == -1) {
perror ("stream_sock listen");
return FALSE;
}
fcntl (src->sock, F_SETFL, O_NONBLOCK);
switch (src->control) {
case CONTROL_TCP:
if ((src->control_sock = socket (AF_INET, SOCK_STREAM, 0)) == -1) {
perror ("control_socket");
return FALSE;
}
src->myaddr.sin_port = htons (src->port + 1);
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 ("control listen");
return FALSE;
}
fcntl (src->control_sock, F_SETFL, O_NONBLOCK);
case CONTROL_NONE:
GST_FLAG_SET (src, GST_TCPSRC_OPEN);
return TRUE;
break;
default:
return FALSE;
break;
}
GST_FLAG_SET (src, GST_TCPSRC_OPEN);
return TRUE;
}
static void
gst_tcpsrc_close (GstTCPSrc * src)
{
if (src->sock != -1) {
close (src->sock);
src->sock = -1;
}
if (src->control_sock != -1) {
close (src->control_sock);
src->control_sock = -1;
}
if (src->client_sock != -1) {
close (src->client_sock);
src->client_sock = -1;
}
GST_FLAG_UNSET (src, GST_TCPSRC_OPEN);
}
static GstElementStateReturn
gst_tcpsrc_change_state (GstElement * element)
{
g_return_val_if_fail (GST_IS_TCPSRC (element), GST_STATE_FAILURE);
if (GST_STATE_PENDING (element) == GST_STATE_NULL) {
if (GST_FLAG_IS_SET (element, GST_TCPSRC_OPEN))
gst_tcpsrc_close (GST_TCPSRC (element));
} else {
if (!GST_FLAG_IS_SET (element, GST_TCPSRC_OPEN)) {
if (!gst_tcpsrc_init_receive (GST_TCPSRC (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;
}