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459 lines
13 KiB
C
459 lines
13 KiB
C
/* GStreamer
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* Copyright (C) <2007> Leandro Melo de Sales <leandroal@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-dccpserversink
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* @see_also: dccpclientsink, dccpclientsrc, dccpserversrc
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*
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* This element wait for connections from clients and send data to them.
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* <ulink url="http://www.linuxfoundation.org/en/Net:DCCP">DCCP</ulink> (Datagram
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* Congestion Control Protocol) is a Transport Layer protocol like
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* TCP and UDP.
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*
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* <refsect2>
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* <title>Example pipeline</title>
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* <para>
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* |[
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* gst-launch -v dccpclientsrc host=localhost port=9011 ccid=2 ! decodebin ! alsasink
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* ]| Client
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* |[
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* gst-launch -v filesrc location=music.mp3 ! mp3parse ! dccpserversink port=9011 ccid=2
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* ]| Server
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*
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* This example pipeline will send a MP3 stream to the client using DCCP.
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* The client will decode the MP3 and play it. Run the server pipeline
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* first than the client pipeline. If you want, you can run more than one dccpclientsrc
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* to connect to the same server (see wait-connections property at dccpserversink).
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* </para>
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstdccpserversink.h"
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#include "gstdccp.h"
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#include <fcntl.h>
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/* signals */
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enum
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{
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SIGNAL_CONNECTED,
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LAST_SIGNAL
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};
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/* properties */
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enum
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{
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PROP_0,
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PROP_PORT,
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PROP_CLIENT_SOCK_FD,
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PROP_CCID,
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PROP_CLOSED,
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PROP_WAIT_CONNECTIONS
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};
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static pthread_t accept_thread_id;
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static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
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static gboolean gst_dccp_server_sink_stop (GstBaseSink * bsink);
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GST_DEBUG_CATEGORY_STATIC (dccpserversink_debug);
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static const GstElementDetails gst_dccp_server_sink_details =
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GST_ELEMENT_DETAILS ("DCCP server sink",
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"Sink/Network",
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"Send data as a server over the network via DCCP",
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"E-Phone Team at Federal University of Campina Grande <leandroal@gmail.com>");
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static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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GST_BOILERPLATE (GstDCCPServerSink, gst_dccp_server_sink, GstBaseSink,
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GST_TYPE_BASE_SINK);
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static guint gst_dccp_server_sink_signals[LAST_SIGNAL] = { 0 };
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/*
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* Create a new client with the socket and the MTU
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*
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* @param element - the gstdccpserversink instance
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* @param socket - the client socket
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* @return the client
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*/
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static Client *
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gst_dccp_server_create_client (GstElement * element, int socket)
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{
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Client *client = (Client *) g_malloc (sizeof (Client));
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client->socket = socket;
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client->pksize = gst_dccp_get_max_packet_size (element, client->socket);
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client->flow_status = GST_FLOW_OK;
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GST_DEBUG_OBJECT (element, "Creating a new client with fd %d and MTU %d.",
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client->socket, client->pksize);
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/* the socket is connected */
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g_signal_emit (element, gst_dccp_server_sink_signals[SIGNAL_CONNECTED], 0,
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socket);
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return client;
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}
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/*
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* Wait connections of new clients
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*
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* @param arg - the gstdccpserversink instance
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*/
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static void *
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gst_dccp_server_accept_new_clients (void *arg)
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{
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GstDCCPServerSink *sink = (GstDCCPServerSink *) arg;
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int newsockfd;
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Client *client;
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while (1) {
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newsockfd =
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gst_dccp_server_wait_connections (GST_ELEMENT (sink), sink->sock_fd);
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client = gst_dccp_server_create_client (GST_ELEMENT (sink), newsockfd);
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pthread_mutex_lock (&lock);
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sink->clients = g_list_append (sink->clients, client);
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pthread_mutex_unlock (&lock);
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}
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return NULL;
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}
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/*
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* Send the buffer to a client
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*
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* @param arg - the client
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*/
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static void *
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gst_dccp_server_send_buffer (void *arg)
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{
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Client *client = (Client *) arg;
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GstDCCPServerSink *sink = client->server;
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GstBuffer *buf = client->buf;
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int client_sock_fd = client->socket;
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int pksize = client->pksize;
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if (gst_dccp_send_buffer (GST_ELEMENT (sink), buf, client_sock_fd,
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pksize) == GST_FLOW_ERROR) {
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client->flow_status = GST_FLOW_ERROR;
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}
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return NULL;
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}
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/* Remove clients with problems to send.
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*
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* @param arg - the gstdccpserversink instance
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*/
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static void *
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gst_dccp_server_delete_dead_clients (void *arg)
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{
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GstDCCPServerSink *sink = (GstDCCPServerSink *) arg;
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int i;
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GList *tmp = NULL;
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pthread_mutex_lock (&lock);
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for (i = 0; i < g_list_length (sink->clients); i++) {
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Client *client = (Client *) g_list_nth_data (sink->clients, i);
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if (client->flow_status == GST_FLOW_OK) {
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tmp = g_list_append (tmp, client);
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} else {
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close (client->socket);
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g_free (client);
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}
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}
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g_list_free (sink->clients);
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sink->clients = tmp;
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pthread_mutex_unlock (&lock);
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return 0;
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}
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static void
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gst_dccp_server_sink_init (GstDCCPServerSink * this,
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GstDCCPServerSinkClass * g_class)
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{
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this->port = DCCP_DEFAULT_PORT;
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this->sock_fd = DCCP_DEFAULT_SOCK_FD;
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this->client_sock_fd = DCCP_DEFAULT_CLIENT_SOCK_FD;
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this->closed = DCCP_DEFAULT_CLOSED;
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this->ccid = DCCP_DEFAULT_CCID;
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this->wait_connections = DCCP_DEFAULT_WAIT_CONNECTIONS;
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this->clients = NULL;
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}
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/*
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* Starts the element. If the sockfd property was not the default, this method
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* will wait for a client connection. If wait-connections property is true, it
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* creates a thread to wait for new client connections.
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*
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* @param bsink - the element
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* @return TRUE if the send operation was successful, FALSE otherwise.
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*/
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static gboolean
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gst_dccp_server_sink_start (GstBaseSink * bsink)
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{
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GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (bsink);
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Client *client;
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if ((sink->sock_fd = gst_dccp_create_new_socket (GST_ELEMENT (sink))) < 0) {
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return FALSE;
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}
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if (!gst_dccp_make_address_reusable (GST_ELEMENT (sink), sink->sock_fd)) {
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return FALSE;
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}
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/* name the server socket */
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memset (&sink->server_sin, 0, sizeof (sink->server_sin));
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sink->server_sin.sin_family = AF_INET; /* network socket */
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sink->server_sin.sin_port = htons (sink->port); /* on port */
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sink->server_sin.sin_addr.s_addr = htonl (INADDR_ANY); /* for hosts */
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if (!gst_dccp_bind_server_socket (GST_ELEMENT (sink), sink->sock_fd,
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sink->server_sin)) {
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return FALSE;
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}
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if (!gst_dccp_set_ccid (GST_ELEMENT (sink), sink->sock_fd, sink->ccid)) {
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return FALSE;
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}
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if (!gst_dccp_listen_server_socket (GST_ELEMENT (sink), sink->sock_fd)) {
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return FALSE;
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}
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if (sink->client_sock_fd == DCCP_DEFAULT_CLIENT_SOCK_FD) {
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sink->client_sock_fd =
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gst_dccp_server_wait_connections (GST_ELEMENT (sink), sink->sock_fd);
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}
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if (sink->client_sock_fd == -1) {
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return FALSE;
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}
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client =
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gst_dccp_server_create_client (GST_ELEMENT (sink), sink->client_sock_fd);
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sink->clients = g_list_append (sink->clients, client);
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pthread_mutex_init (&lock, NULL);
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if (sink->wait_connections == TRUE) {
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pthread_create (&accept_thread_id, NULL, gst_dccp_server_accept_new_clients,
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sink);
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pthread_detach (accept_thread_id);
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}
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return TRUE;
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}
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static GstFlowReturn
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gst_dccp_server_sink_render (GstBaseSink * bsink, GstBuffer * buf)
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{
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GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (bsink);
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pthread_t thread_id;
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int i;
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pthread_mutex_lock (&lock);
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for (i = 0; i < g_list_length (sink->clients); i++) {
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Client *client = (Client *) g_list_nth_data (sink->clients, i);
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client->buf = buf;
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client->server = sink;
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if (client->flow_status == GST_FLOW_OK) {
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pthread_create (&thread_id, NULL, gst_dccp_server_send_buffer,
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(void *) client);
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pthread_detach (thread_id);
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} else {
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pthread_create (&thread_id, NULL, gst_dccp_server_delete_dead_clients,
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(void *) sink);
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pthread_detach (thread_id);
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}
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}
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pthread_mutex_unlock (&lock);
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return GST_FLOW_OK;
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}
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static gboolean
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gst_dccp_server_sink_stop (GstBaseSink * bsink)
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{
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GstDCCPServerSink *sink;
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int i;
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sink = GST_DCCP_SERVER_SINK (bsink);
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if (sink->wait_connections == TRUE) {
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pthread_cancel (accept_thread_id);
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}
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gst_dccp_socket_close (GST_ELEMENT (sink), &(sink->sock_fd));
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pthread_mutex_lock (&lock);
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for (i = 0; i < g_list_length (sink->clients); i++) {
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Client *client = (Client *) g_list_nth_data (sink->clients, i);
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if (client->socket != DCCP_DEFAULT_CLIENT_SOCK_FD && sink->closed == TRUE) {
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gst_dccp_socket_close (GST_ELEMENT (sink), &(client->socket));
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}
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g_free (client);
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}
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pthread_mutex_unlock (&lock);
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return TRUE;
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}
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static void
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gst_dccp_server_sink_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&sinktemplate));
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gst_element_class_set_details (element_class, &gst_dccp_server_sink_details);
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}
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/*
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* Set the value of a property for the server sink.
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*/
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static void
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gst_dccp_server_sink_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (object);
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switch (prop_id) {
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case PROP_PORT:
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sink->port = g_value_get_int (value);
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break;
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case PROP_CLIENT_SOCK_FD:
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sink->client_sock_fd = g_value_get_int (value);
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break;
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case PROP_CLOSED:
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sink->closed = g_value_get_boolean (value);
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break;
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case PROP_WAIT_CONNECTIONS:
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sink->wait_connections = g_value_get_boolean (value);
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break;
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case PROP_CCID:
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sink->ccid = g_value_get_int (value);
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break;
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default:
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break;
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}
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}
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static void
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gst_dccp_server_sink_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (object);
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switch (prop_id) {
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case PROP_PORT:
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g_value_set_int (value, sink->port);
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break;
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case PROP_CLIENT_SOCK_FD:
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g_value_set_int (value, sink->client_sock_fd);
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break;
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case PROP_CLOSED:
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g_value_set_boolean (value, sink->closed);
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break;
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case PROP_WAIT_CONNECTIONS:
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g_value_set_boolean (value, sink->wait_connections);
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break;
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case PROP_CCID:
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g_value_set_int (value, sink->ccid);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_dccp_server_sink_class_init (GstDCCPServerSinkClass * klass)
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{
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GObjectClass *gobject_class;
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GstBaseSinkClass *gstbasesink_class;
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gobject_class = (GObjectClass *) klass;
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gstbasesink_class = (GstBaseSinkClass *) klass;
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gobject_class->set_property = gst_dccp_server_sink_set_property;
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gobject_class->get_property = gst_dccp_server_sink_get_property;
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PORT,
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g_param_spec_int ("port", "Port",
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"The port to listen to", 0, G_MAXUINT16,
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DCCP_DEFAULT_PORT, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_CLIENT_SOCK_FD,
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g_param_spec_int ("sockfd", "Socket fd",
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"The client socket file descriptor", -1, G_MAXINT,
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DCCP_DEFAULT_CLIENT_SOCK_FD, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_CLOSED,
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g_param_spec_boolean ("close-socket", "Close",
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"Close the client sockets at end of stream",
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DCCP_DEFAULT_CLOSED, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_CCID,
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g_param_spec_int ("ccid", "CCID",
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"The Congestion Control IDentified to be used", 2, G_MAXINT,
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DCCP_DEFAULT_CCID, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_WAIT_CONNECTIONS,
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g_param_spec_boolean ("wait-connections", "Wait connections",
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"Wait for many client connections",
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DCCP_DEFAULT_WAIT_CONNECTIONS, G_PARAM_READWRITE));
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/* signals */
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/**
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* GstDccpServerSink::connected:
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* @sink: the gstdccpserversink element that emitted this signal
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* @fd: the connected socket file descriptor
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*
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* Reports that the element has connected, giving the fd of the socket
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*/
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gst_dccp_server_sink_signals[SIGNAL_CONNECTED] =
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g_signal_new ("connected", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (GstDCCPServerSinkClass, connected), NULL, NULL,
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gst_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);
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gstbasesink_class->start = gst_dccp_server_sink_start;
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gstbasesink_class->stop = gst_dccp_server_sink_stop;
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gstbasesink_class->render = gst_dccp_server_sink_render;
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GST_DEBUG_CATEGORY_INIT (dccpserversink_debug, "dccpserversink", 0,
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"DCCP Server Sink");
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}
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