gstreamer/gst/tcp/gsttcpclientsrc.c

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2004> Thomas Vander Stichele <thomas at apestaart dot org>
*
* 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 <gst/gst-i18n-plugin.h>
#include "gsttcp.h"
#include "gsttcpclientsrc.h"
#include <string.h> /* memset */
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>
#ifdef HAVE_FIONREAD_IN_SYS_FILIO
#include <sys/filio.h>
#endif
GST_DEBUG_CATEGORY (tcpclientsrc_debug);
#define GST_CAT_DEFAULT tcpclientsrc_debug
#define TCP_DEFAULT_PORT 4953
#define TCP_DEFAULT_HOST "localhost"
#define MAX_READ_SIZE 4 * 1024
/* elementfactory information */
static GstElementDetails gst_tcpclientsrc_details =
GST_ELEMENT_DETAILS ("TCP Client source",
"Source/Network",
"Receive data as a client over the network via TCP",
"Thomas Vander Stichele <thomas at apestaart dot org>");
/* TCPClientSrc signals and args */
enum
{
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_HOST,
ARG_PORT,
ARG_PROTOCOL
};
static void gst_tcpclientsrc_base_init (gpointer g_class);
static void gst_tcpclientsrc_class_init (GstTCPClientSrc * klass);
static void gst_tcpclientsrc_init (GstTCPClientSrc * tcpclientsrc);
static GstCaps *gst_tcpclientsrc_getcaps (GstPad * pad);
static GstData *gst_tcpclientsrc_get (GstPad * pad);
static GstElementStateReturn gst_tcpclientsrc_change_state (GstElement *
element);
static void gst_tcpclientsrc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_tcpclientsrc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_tcpclientsrc_set_clock (GstElement * element, GstClock * clock);
static GstElementClass *parent_class = NULL;
/*static guint gst_tcpclientsrc_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_tcpclientsrc_get_type (void)
{
static GType tcpclientsrc_type = 0;
if (!tcpclientsrc_type) {
static const GTypeInfo tcpclientsrc_info = {
sizeof (GstTCPClientSrcClass),
gst_tcpclientsrc_base_init,
NULL,
(GClassInitFunc) gst_tcpclientsrc_class_init,
NULL,
NULL,
sizeof (GstTCPClientSrc),
0,
(GInstanceInitFunc) gst_tcpclientsrc_init,
NULL
};
tcpclientsrc_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstTCPClientSrc",
&tcpclientsrc_info, 0);
}
return tcpclientsrc_type;
}
static void
gst_tcpclientsrc_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_tcpclientsrc_details);
}
static void
gst_tcpclientsrc_class_init (GstTCPClientSrc * 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_HOST,
g_param_spec_string ("host", "Host",
"The host IP address to receive packets from", TCP_DEFAULT_HOST,
G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PORT,
g_param_spec_int ("port", "Port", "The port to receive packets from", 0,
32768, TCP_DEFAULT_PORT, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_PROTOCOL,
g_param_spec_enum ("protocol", "Protocol", "The protocol to wrap data in",
GST_TYPE_TCP_PROTOCOL_TYPE, GST_TCP_PROTOCOL_TYPE_NONE,
G_PARAM_READWRITE));
gobject_class->set_property = gst_tcpclientsrc_set_property;
gobject_class->get_property = gst_tcpclientsrc_get_property;
gstelement_class->change_state = gst_tcpclientsrc_change_state;
gstelement_class->set_clock = gst_tcpclientsrc_set_clock;
GST_DEBUG_CATEGORY_INIT (tcpclientsrc_debug, "tcpclientsrc", 0,
"TCP Client Source");
}
static void
gst_tcpclientsrc_set_clock (GstElement * element, GstClock * clock)
{
GstTCPClientSrc *tcpclientsrc;
tcpclientsrc = GST_TCPCLIENTSRC (element);
tcpclientsrc->clock = clock;
}
static void
gst_tcpclientsrc_init (GstTCPClientSrc * this)
{
/* create the src pad */
this->srcpad = gst_pad_new ("src", GST_PAD_SRC);
gst_element_add_pad (GST_ELEMENT (this), this->srcpad);
gst_pad_set_get_function (this->srcpad, gst_tcpclientsrc_get);
gst_pad_set_getcaps_function (this->srcpad, gst_tcpclientsrc_getcaps);
this->port = TCP_DEFAULT_PORT;
this->host = g_strdup (TCP_DEFAULT_HOST);
this->clock = NULL;
this->sock_fd = -1;
this->protocol = GST_TCP_PROTOCOL_TYPE_NONE;
this->curoffset = 0;
this->caps = NULL;
GST_FLAG_UNSET (this, GST_TCPCLIENTSRC_OPEN);
}
static GstCaps *
gst_tcpclientsrc_getcaps (GstPad * pad)
{
GstTCPClientSrc *src;
GstCaps *caps = NULL;
src = GST_TCPCLIENTSRC (GST_OBJECT_PARENT (pad));
if (!GST_FLAG_IS_SET (src, GST_TCPCLIENTSRC_OPEN))
caps = gst_caps_new_any ();
else if (src->caps)
caps = gst_caps_copy (src->caps);
else
caps = gst_caps_new_any ();
GST_DEBUG_OBJECT (src, "returning caps %" GST_PTR_FORMAT, caps);
g_assert (GST_IS_CAPS (caps));
return caps;
}
static GstData *
gst_tcpclientsrc_get (GstPad * pad)
{
GstTCPClientSrc *src;
size_t readsize;
int ret;
GstData *data = NULL;
GstBuffer *buf = NULL;
g_return_val_if_fail (pad != NULL, NULL);
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
src = GST_TCPCLIENTSRC (GST_OBJECT_PARENT (pad));
g_return_val_if_fail (GST_FLAG_IS_SET (src, GST_TCPCLIENTSRC_OPEN), NULL);
/* if we have a left over buffer after a discont, return that */
if (src->buffer_after_discont) {
buf = src->buffer_after_discont;
GST_LOG_OBJECT (src,
"Returning buffer after discont of size %d with timestamp %"
GST_TIME_FORMAT " and duration %" GST_TIME_FORMAT,
GST_BUFFER_SIZE (buf), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
src->buffer_after_discont = NULL;
return GST_DATA (buf);
}
/* read the buffer header if we're using a protocol */
switch (src->protocol) {
fd_set testfds;
case GST_TCP_PROTOCOL_TYPE_NONE:
/* do a blocking select on the socket */
FD_ZERO (&testfds);
FD_SET (src->sock_fd, &testfds);
ret = select (src->sock_fd + 1, &testfds, (fd_set *) 0, (fd_set *) 0, 0);
/* no action (0) is an error too in our case */
if (ret <= 0) {
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("select failed: %s", g_strerror (errno)));
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
/* ask how much is available for reading on the socket */
ret = ioctl (src->sock_fd, FIONREAD, &readsize);
if (ret < 0) {
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("ioctl failed: %s", g_strerror (errno)));
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
GST_LOG_OBJECT (src, "ioctl says %d bytes available", readsize);
buf = gst_buffer_new_and_alloc (readsize);
break;
case GST_TCP_PROTOCOL_TYPE_GDP:
if (!(data = gst_tcp_gdp_read_header (GST_ELEMENT (src), src->sock_fd))) {
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("Could not read data header through GDP"));
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
if (GST_IS_EVENT (data))
return data;
buf = GST_BUFFER (data);
GST_LOG_OBJECT (src, "Going to read data from socket into buffer %p",
buf);
/* use this new buffer to read data into */
readsize = GST_BUFFER_SIZE (buf);
break;
default:
g_warning ("Unhandled protocol type");
break;
}
GST_LOG_OBJECT (src, "Reading %d bytes", readsize);
ret = gst_tcp_socket_read (src->sock_fd, GST_BUFFER_DATA (buf), readsize);
if (ret < 0) {
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL), GST_ERROR_SYSTEM);
gst_buffer_unref (buf);
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
/* if we read 0 bytes, and we're blocking, we hit eos */
if (ret == 0) {
GST_DEBUG ("blocking read returns 0, EOS");
gst_buffer_unref (buf);
gst_element_set_eos (GST_ELEMENT (src));
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
readsize = ret;
GST_BUFFER_SIZE (buf) = readsize;
GST_BUFFER_MAXSIZE (buf) = readsize;
GST_BUFFER_OFFSET (buf) = src->curoffset;
GST_BUFFER_OFFSET_END (buf) = src->curoffset + readsize;
/* if this is our first buffer, we need to send a discont with the
* given timestamp or the current offset, and store the buffer for
* the next iteration through the get loop */
if (src->send_discont) {
GstClockTime timestamp;
GstEvent *event;
src->send_discont = FALSE;
src->buffer_after_discont = buf;
/* if the timestamp is valid, send a timed discont
* taking into account the incoming buffer's timestamps */
timestamp = GST_BUFFER_TIMESTAMP (buf);
if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
GST_DEBUG_OBJECT (src,
"sending discontinuous with timestamp %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp));
event =
gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, timestamp, NULL);
return GST_DATA (event);
}
/* otherwise, send an offset discont */
GST_DEBUG_OBJECT (src, "sending discontinuous with offset %d",
src->curoffset);
event =
gst_event_new_discontinuous (FALSE, GST_FORMAT_BYTES, src->curoffset,
NULL);
return GST_DATA (event);
}
src->curoffset += readsize;
GST_LOG_OBJECT (src,
"Returning buffer of size %d with timestamp %" GST_TIME_FORMAT
" and duration %" GST_TIME_FORMAT, readsize,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
return GST_DATA (buf);
}
static void
gst_tcpclientsrc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstTCPClientSrc *tcpclientsrc;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_TCPCLIENTSRC (object));
tcpclientsrc = GST_TCPCLIENTSRC (object);
switch (prop_id) {
case ARG_HOST:
g_free (tcpclientsrc->host);
tcpclientsrc->host = g_strdup (g_value_get_string (value));
break;
case ARG_PORT:
tcpclientsrc->port = g_value_get_int (value);
break;
case ARG_PROTOCOL:
tcpclientsrc->protocol = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_tcpclientsrc_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstTCPClientSrc *tcpclientsrc;
g_return_if_fail (GST_IS_TCPCLIENTSRC (object));
tcpclientsrc = GST_TCPCLIENTSRC (object);
switch (prop_id) {
case ARG_HOST:
g_value_set_string (value, tcpclientsrc->host);
break;
case ARG_PORT:
g_value_set_int (value, tcpclientsrc->port);
break;
case ARG_PROTOCOL:
g_value_set_enum (value, tcpclientsrc->protocol);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* create a socket for connecting to remote server */
static gboolean
gst_tcpclientsrc_init_receive (GstTCPClientSrc * this)
{
int ret;
gchar *ip;
/* create receiving client socket */
GST_DEBUG_OBJECT (this, "opening receiving client socket to %s:%d",
this->host, this->port);
if ((this->sock_fd = socket (AF_INET, SOCK_STREAM, 0)) == -1) {
GST_ELEMENT_ERROR (this, RESOURCE, OPEN_READ, (NULL), GST_ERROR_SYSTEM);
return FALSE;
}
GST_DEBUG_OBJECT (this, "opened receiving client socket with fd %d",
this->sock_fd);
/* look up name if we need to */
ip = gst_tcp_host_to_ip (GST_ELEMENT (this), this->host);
if (!ip)
return FALSE;
GST_DEBUG_OBJECT (this, "IP address for host %s is %s", this->host, ip);
/* connect to server */
memset (&this->server_sin, 0, sizeof (this->server_sin));
this->server_sin.sin_family = AF_INET; /* network socket */
this->server_sin.sin_port = htons (this->port); /* on port */
this->server_sin.sin_addr.s_addr = inet_addr (ip); /* on host ip */
GST_DEBUG_OBJECT (this, "connecting to server");
ret = connect (this->sock_fd, (struct sockaddr *) &this->server_sin,
sizeof (this->server_sin));
if (ret) {
switch (errno) {
case ECONNREFUSED:
GST_ELEMENT_ERROR (this, RESOURCE, OPEN_READ,
(_("Connection to %s:%d refused."), this->host, this->port),
(NULL));
return FALSE;
break;
default:
GST_ELEMENT_ERROR (this, RESOURCE, OPEN_READ, (NULL),
("connect to %s:%d failed: %s", this->host, this->port,
g_strerror (errno)));
return FALSE;
break;
}
}
this->send_discont = TRUE;
this->buffer_after_discont = NULL;
GST_FLAG_SET (this, GST_TCPCLIENTSRC_OPEN);
/* get the caps if we're using GDP */
if (this->protocol == GST_TCP_PROTOCOL_TYPE_GDP) {
/* if we haven't received caps yet, we should get them first */
if (!this->caps_received) {
GstCaps *caps;
GST_DEBUG_OBJECT (this, "getting caps through GDP");
if (!(caps = gst_tcp_gdp_read_caps (GST_ELEMENT (this), this->sock_fd))) {
GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL),
("Could not read caps through GDP"));
return FALSE;
}
if (!GST_IS_CAPS (caps)) {
GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL),
("Could not read caps through GDP"));
return FALSE;
}
GST_DEBUG_OBJECT (this, "Received caps through GDP: %" GST_PTR_FORMAT,
caps);
this->caps_received = TRUE;
this->caps = caps;
}
}
return TRUE;
}
static void
gst_tcpclientsrc_close (GstTCPClientSrc * this)
{
if (this->sock_fd != -1) {
close (this->sock_fd);
this->sock_fd = -1;
}
this->caps_received = FALSE;
if (this->caps) {
gst_caps_free (this->caps);
this->caps = NULL;
}
GST_FLAG_UNSET (this, GST_TCPCLIENTSRC_OPEN);
}
static GstElementStateReturn
gst_tcpclientsrc_change_state (GstElement * element)
{
g_return_val_if_fail (GST_IS_TCPCLIENTSRC (element), GST_STATE_FAILURE);
if (GST_STATE_PENDING (element) == GST_STATE_NULL) {
if (GST_FLAG_IS_SET (element, GST_TCPCLIENTSRC_OPEN))
gst_tcpclientsrc_close (GST_TCPCLIENTSRC (element));
} else {
if (!GST_FLAG_IS_SET (element, GST_TCPCLIENTSRC_OPEN)) {
if (!gst_tcpclientsrc_init_receive (GST_TCPCLIENTSRC (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;
}