2 Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 /** @file src/server.cc
21 * @brief Class to describe a server to which we can send
22 * encoding work, and a class to implement such a server.
29 #include <boost/algorithm/string.hpp>
30 #include <boost/lexical_cast.hpp>
31 #include <boost/scoped_array.hpp>
32 #include <libcxml/cxml.h>
37 #include "dcp_video_frame.h"
44 using std::stringstream;
49 using boost::shared_ptr;
50 using boost::algorithm::is_any_of;
51 using boost::algorithm::split;
54 using boost::scoped_array;
55 using boost::optional;
56 using boost::lexical_cast;
59 ServerDescription::ServerDescription (shared_ptr<const cxml::Node> node)
61 _host_name = node->string_child ("HostName");
62 _threads = node->number_child<int> ("Threads");
66 ServerDescription::as_xml (xmlpp::Node* root) const
68 root->add_child("HostName")->add_child_text (_host_name);
69 root->add_child("Threads")->add_child_text (boost::lexical_cast<string> (_threads));
72 /** Create a server description from a string of metadata returned from as_metadata().
74 * @return ServerDescription, or 0.
76 optional<ServerDescription>
77 ServerDescription::create_from_metadata (string v)
80 split (b, v, is_any_of (" "));
83 return optional<ServerDescription> ();
86 return ServerDescription (b[0], atoi (b[1].c_str ()));
89 Server::Server (shared_ptr<Log> log)
96 Server::process (shared_ptr<Socket> socket)
98 uint32_t length = socket->read_uint32 ();
99 scoped_array<char> buffer (new char[length]);
100 socket->read (reinterpret_cast<uint8_t*> (buffer.get()), length);
102 stringstream s (buffer.get());
103 shared_ptr<cxml::Document> xml (new cxml::Document ("EncodingRequest"));
104 xml->read_stream (s);
105 if (xml->number_child<int> ("Version") != SERVER_LINK_VERSION) {
106 _log->log ("Mismatched server/client versions");
111 xml->number_child<int> ("Width"), xml->number_child<int> ("Height")
114 shared_ptr<Image> image (new Image (PIX_FMT_RGB24, size, true));
116 image->read_from_socket (socket);
117 DCPVideoFrame dcp_video_frame (image, xml, _log);
119 shared_ptr<EncodedData> encoded = dcp_video_frame.encode_locally ();
121 encoded->send (socket);
122 } catch (std::exception& e) {
123 _log->log (String::compose (
124 "Send failed; frame %1, data size %2, pixel format %3, image size %4x%5, %6 components",
125 dcp_video_frame.frame(), encoded->size(), image->pixel_format(), image->size().width, image->size().height, image->components()
131 return dcp_video_frame.frame ();
135 Server::worker_thread ()
138 boost::mutex::scoped_lock lock (_worker_mutex);
139 while (_queue.empty ()) {
140 _worker_condition.wait (lock);
143 shared_ptr<Socket> socket = _queue.front ();
150 struct timeval start;
151 gettimeofday (&start, 0);
154 frame = process (socket);
155 } catch (std::exception& e) {
156 _log->log (String::compose ("Error: %1", e.what()));
165 gettimeofday (&end, 0);
166 cout << String::compose ("Encoded frame %1 in %2", frame, seconds (end) - seconds (start)) << "\n";
167 _log->log (String::compose ("Encoded frame %1 in %2", frame, seconds (end) - seconds (start)));
170 _worker_condition.notify_all ();
175 Server::run (int num_threads)
177 _log->log (String::compose (N_("Server starting with %1 threads"), num_threads));
179 for (int i = 0; i < num_threads; ++i) {
180 _worker_threads.push_back (new thread (bind (&Server::worker_thread, this)));
183 _broadcast.thread = new thread (bind (&Server::broadcast_thread, this));
185 boost::asio::io_service io_service;
187 boost::asio::ip::tcp::acceptor acceptor (
189 boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), Config::instance()->server_port_base ())
193 shared_ptr<Socket> socket (new Socket);
194 acceptor.accept (socket->socket ());
196 boost::mutex::scoped_lock lock (_worker_mutex);
198 /* Wait until the queue has gone down a bit */
199 while (int (_queue.size()) >= num_threads * 2) {
200 _worker_condition.wait (lock);
203 _queue.push_back (socket);
204 _worker_condition.notify_all ();
209 Server::broadcast_thread ()
211 boost::asio::io_service io_service;
213 boost::asio::ip::address address = boost::asio::ip::address_v4::any ();
214 boost::asio::ip::udp::endpoint listen_endpoint (address, Config::instance()->server_port_base() + 1);
216 _broadcast.socket = new boost::asio::ip::udp::socket (io_service);
217 _broadcast.socket->open (listen_endpoint.protocol ());
218 _broadcast.socket->bind (listen_endpoint);
220 _broadcast.socket->async_receive_from (
221 boost::asio::buffer (_broadcast.buffer, sizeof (_broadcast.buffer)),
222 _broadcast.send_endpoint,
223 boost::bind (&Server::broadcast_received, this)
230 Server::broadcast_received ()
232 _broadcast.buffer[sizeof(_broadcast.buffer) - 1] = '\0';
234 if (strcmp (_broadcast.buffer, DCPOMATIC_HELLO) == 0) {
235 /* Reply to the client saying what we can do */
237 xmlpp::Element* root = doc.create_root_node ("ServerAvailable");
238 root->add_child("Threads")->add_child_text (lexical_cast<string> (_worker_threads.size ()));
240 doc.write_to_stream (xml, "UTF-8");
242 shared_ptr<Socket> socket (new Socket);
244 socket->connect (boost::asio::ip::tcp::endpoint (_broadcast.send_endpoint.address(), Config::instance()->server_port_base() + 1));
245 socket->write (xml.str().length() + 1);
246 socket->write ((uint8_t *) xml.str().c_str(), xml.str().length() + 1);
252 _broadcast.socket->async_receive_from (
253 boost::asio::buffer (_broadcast.buffer, sizeof (_broadcast.buffer)),
254 _broadcast.send_endpoint, boost::bind (&Server::broadcast_received, this)