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|
/* GStreamer
* Copyright (C) <2007> Leandro Melo de Sales <leandroal@gmail.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-dccpserversink
* @see_also: dccpclientsink, dccpclientsrc, dccpserversrc
*
* This element wait for connections from clients and send data to them.
* <ulink url="http://www.linuxfoundation.org/en/Net:DCCP">DCCP</ulink> (Datagram
* Congestion Control Protocol) is a Transport Layer protocol like
* TCP and UDP.
*
* <refsect2>
* <title>Example pipeline</title>
* <para>
* |[
* gst-launch -v dccpclientsrc host=localhost port=9011 ccid=2 ! decodebin ! alsasink
* ]| Client
* |[
* gst-launch -v filesrc location=music.mp3 ! mp3parse ! dccpserversink port=9011 ccid=2
* ]| Server
*
* This example pipeline will send a MP3 stream to the client using DCCP.
* The client will decode the MP3 and play it. Run the server pipeline
* first than the client pipeline. If you want, you can run more than one dccpclientsrc
* to connect to the same server (see wait-connections property at dccpserversink).
* </para>
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstdccpserversink.h"
#include "gstdccp.h"
#include <fcntl.h>
/* signals */
enum
{
SIGNAL_CONNECTED,
LAST_SIGNAL
};
/* properties */
enum
{
PROP_0,
PROP_PORT,
PROP_CLIENT_SOCK_FD,
PROP_CCID,
PROP_CLOSED,
PROP_WAIT_CONNECTIONS
};
static pthread_t accept_thread_id;
static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
static gboolean gst_dccp_server_sink_stop (GstBaseSink * bsink);
GST_DEBUG_CATEGORY_STATIC (dccpserversink_debug);
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
GST_BOILERPLATE (GstDCCPServerSink, gst_dccp_server_sink, GstBaseSink,
GST_TYPE_BASE_SINK);
static guint gst_dccp_server_sink_signals[LAST_SIGNAL] = { 0 };
/*
* Create a new client with the socket and the MTU
*
* @param element - the gstdccpserversink instance
* @param socket - the client socket
* @return the client
*/
static Client *
gst_dccp_server_create_client (GstElement * element, int socket)
{
Client *client = (Client *) g_malloc (sizeof (Client));
client->socket = socket;
client->pksize = gst_dccp_get_max_packet_size (element, client->socket);
client->flow_status = GST_FLOW_OK;
GST_DEBUG_OBJECT (element, "Creating a new client with fd %d and MTU %d.",
client->socket, client->pksize);
/* the socket is connected */
g_signal_emit (element, gst_dccp_server_sink_signals[SIGNAL_CONNECTED], 0,
socket);
return client;
}
/*
* Wait connections of new clients
*
* @param arg - the gstdccpserversink instance
*/
static void *
gst_dccp_server_accept_new_clients (void *arg)
{
GstDCCPServerSink *sink = (GstDCCPServerSink *) arg;
int newsockfd;
Client *client;
while (1) {
newsockfd =
gst_dccp_server_wait_connections (GST_ELEMENT (sink), sink->sock_fd);
client = gst_dccp_server_create_client (GST_ELEMENT (sink), newsockfd);
pthread_mutex_lock (&lock);
sink->clients = g_list_append (sink->clients, client);
pthread_mutex_unlock (&lock);
}
return NULL;
}
/*
* Send the buffer to a client
*
* @param arg - the client
*/
static void *
gst_dccp_server_send_buffer (void *arg)
{
Client *client = (Client *) arg;
GstDCCPServerSink *sink = client->server;
GstBuffer *buf = client->buf;
int client_sock_fd = client->socket;
int pksize = client->pksize;
if (gst_dccp_send_buffer (GST_ELEMENT (sink), buf, client_sock_fd,
pksize) == GST_FLOW_ERROR) {
client->flow_status = GST_FLOW_ERROR;
}
return NULL;
}
/* Remove clients with problems to send.
*
* @param arg - the gstdccpserversink instance
*/
static void *
gst_dccp_server_delete_dead_clients (void *arg)
{
GstDCCPServerSink *sink = (GstDCCPServerSink *) arg;
GList *tmp = NULL;
GList *l;
pthread_mutex_lock (&lock);
for (l = sink->clients; l != NULL; l = l->next) {
Client *client = (Client *) l->data;
if (client->flow_status == GST_FLOW_OK) {
tmp = g_list_append (tmp, client);
} else {
close (client->socket);
g_free (client);
}
}
g_list_free (sink->clients);
sink->clients = tmp;
pthread_mutex_unlock (&lock);
return 0;
}
static void
gst_dccp_server_sink_init (GstDCCPServerSink * this,
GstDCCPServerSinkClass * g_class)
{
this->port = DCCP_DEFAULT_PORT;
this->sock_fd = DCCP_DEFAULT_SOCK_FD;
this->client_sock_fd = DCCP_DEFAULT_CLIENT_SOCK_FD;
this->closed = DCCP_DEFAULT_CLOSED;
this->ccid = DCCP_DEFAULT_CCID;
this->wait_connections = DCCP_DEFAULT_WAIT_CONNECTIONS;
this->clients = NULL;
}
/*
* Starts the element. If the sockfd property was not the default, this method
* will wait for a client connection. If wait-connections property is true, it
* creates a thread to wait for new client connections.
*
* @param bsink - the element
* @return TRUE if the send operation was successful, FALSE otherwise.
*/
static gboolean
gst_dccp_server_sink_start (GstBaseSink * bsink)
{
GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (bsink);
Client *client;
if ((sink->sock_fd = gst_dccp_create_new_socket (GST_ELEMENT (sink))) < 0) {
return FALSE;
}
if (!gst_dccp_make_address_reusable (GST_ELEMENT (sink), sink->sock_fd)) {
return FALSE;
}
/* name the server socket */
memset (&sink->server_sin, 0, sizeof (sink->server_sin));
sink->server_sin.sin_family = AF_INET; /* network socket */
sink->server_sin.sin_port = htons (sink->port); /* on port */
sink->server_sin.sin_addr.s_addr = htonl (INADDR_ANY); /* for hosts */
if (!gst_dccp_bind_server_socket (GST_ELEMENT (sink), sink->sock_fd,
sink->server_sin)) {
return FALSE;
}
if (!gst_dccp_set_ccid (GST_ELEMENT (sink), sink->sock_fd, sink->ccid)) {
return FALSE;
}
if (!gst_dccp_listen_server_socket (GST_ELEMENT (sink), sink->sock_fd)) {
return FALSE;
}
if (sink->client_sock_fd == DCCP_DEFAULT_CLIENT_SOCK_FD) {
sink->client_sock_fd =
gst_dccp_server_wait_connections (GST_ELEMENT (sink), sink->sock_fd);
}
if (sink->client_sock_fd == -1) {
return FALSE;
}
client =
gst_dccp_server_create_client (GST_ELEMENT (sink), sink->client_sock_fd);
sink->clients = g_list_append (sink->clients, client);
pthread_mutex_init (&lock, NULL);
if (sink->wait_connections == TRUE) {
pthread_create (&accept_thread_id, NULL, gst_dccp_server_accept_new_clients,
sink);
pthread_detach (accept_thread_id);
}
return TRUE;
}
static GstFlowReturn
gst_dccp_server_sink_render (GstBaseSink * bsink, GstBuffer * buf)
{
GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (bsink);
pthread_t thread_id;
GList *l;
pthread_mutex_lock (&lock);
for (l = sink->clients; l != NULL; l = l->next) {
Client *client = (Client *) l->data;
client->buf = buf;
client->server = sink;
/* FIXME: are we really creating a new thread here for every single buffer
* and every single client? */
if (client->flow_status == GST_FLOW_OK) {
pthread_create (&thread_id, NULL, gst_dccp_server_send_buffer,
(void *) client);
pthread_detach (thread_id);
} else {
/* FIXME: what's the point of doing this in a separate thread if it
* keeps he global lock anyway while going through all the clients and
* waiting for close() to finish? */
pthread_create (&thread_id, NULL, gst_dccp_server_delete_dead_clients,
(void *) sink);
pthread_detach (thread_id);
}
}
pthread_mutex_unlock (&lock);
return GST_FLOW_OK;
}
static gboolean
gst_dccp_server_sink_stop (GstBaseSink * bsink)
{
GstDCCPServerSink *sink;
GList *l;
sink = GST_DCCP_SERVER_SINK (bsink);
if (sink->wait_connections == TRUE) {
pthread_cancel (accept_thread_id);
}
gst_dccp_socket_close (GST_ELEMENT (sink), &(sink->sock_fd));
pthread_mutex_lock (&lock);
for (l = sink->clients; l != NULL; l = l->next) {
Client *client = (Client *) l->data;
if (client->socket != DCCP_DEFAULT_CLIENT_SOCK_FD && sink->closed == TRUE) {
gst_dccp_socket_close (GST_ELEMENT (sink), &(client->socket));
}
g_free (client);
}
pthread_mutex_unlock (&lock);
return TRUE;
}
static void
gst_dccp_server_sink_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 (&sinktemplate));
gst_element_class_set_metadata (element_class, "DCCP server sink",
"Sink/Network",
"Send data as a server over the network via DCCP",
"E-Phone Team at Federal University of Campina Grande <leandroal@gmail.com>");
}
/*
* Set the value of a property for the server sink.
*/
static void
gst_dccp_server_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (object);
switch (prop_id) {
case PROP_PORT:
sink->port = g_value_get_int (value);
break;
case PROP_CLIENT_SOCK_FD:
sink->client_sock_fd = g_value_get_int (value);
break;
case PROP_CLOSED:
sink->closed = g_value_get_boolean (value);
break;
case PROP_WAIT_CONNECTIONS:
sink->wait_connections = g_value_get_boolean (value);
break;
case PROP_CCID:
sink->ccid = g_value_get_int (value);
break;
default:
break;
}
}
static void
gst_dccp_server_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (object);
switch (prop_id) {
case PROP_PORT:
g_value_set_int (value, sink->port);
break;
case PROP_CLIENT_SOCK_FD:
g_value_set_int (value, sink->client_sock_fd);
break;
case PROP_CLOSED:
g_value_set_boolean (value, sink->closed);
break;
case PROP_WAIT_CONNECTIONS:
g_value_set_boolean (value, sink->wait_connections);
break;
case PROP_CCID:
g_value_set_int (value, sink->ccid);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_dccp_server_sink_class_init (GstDCCPServerSinkClass * klass)
{
GObjectClass *gobject_class;
GstBaseSinkClass *gstbasesink_class;
gobject_class = (GObjectClass *) klass;
gstbasesink_class = (GstBaseSinkClass *) klass;
gobject_class->set_property = gst_dccp_server_sink_set_property;
gobject_class->get_property = gst_dccp_server_sink_get_property;
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PORT,
g_param_spec_int ("port", "Port",
"The port to listen to", 0, G_MAXUINT16,
DCCP_DEFAULT_PORT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CLIENT_SOCK_FD,
g_param_spec_int ("sockfd", "Socket fd",
"The client socket file descriptor", -1, G_MAXINT,
DCCP_DEFAULT_CLIENT_SOCK_FD,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CLOSED,
g_param_spec_boolean ("close-socket", "Close",
"Close the client sockets at end of stream",
DCCP_DEFAULT_CLOSED, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CCID,
g_param_spec_int ("ccid", "CCID",
"The Congestion Control IDentified to be used", 2, G_MAXINT,
DCCP_DEFAULT_CCID, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_WAIT_CONNECTIONS,
g_param_spec_boolean ("wait-connections", "Wait connections",
"Wait for many client connections",
DCCP_DEFAULT_WAIT_CONNECTIONS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/* signals */
/**
* GstDccpServerSink::connected:
* @sink: the gstdccpserversink element that emitted this signal
* @fd: the connected socket file descriptor
*
* Reports that the element has connected, giving the fd of the socket
*/
gst_dccp_server_sink_signals[SIGNAL_CONNECTED] =
g_signal_new ("connected", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GstDCCPServerSinkClass, connected), NULL, NULL,
gst_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);
gstbasesink_class->start = gst_dccp_server_sink_start;
gstbasesink_class->stop = gst_dccp_server_sink_stop;
gstbasesink_class->render = gst_dccp_server_sink_render;
GST_DEBUG_CATEGORY_INIT (dccpserversink_debug, "dccpserversink", 0,
"DCCP Server Sink");
}
|