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;
50 using boost::shared_ptr;
51 using boost::algorithm::is_any_of;
52 using boost::algorithm::split;
55 using boost::scoped_array;
56 using boost::optional;
57 using boost::lexical_cast;
60 ServerDescription::ServerDescription (shared_ptr<const cxml::Node> node)
62 _host_name = node->string_child ("HostName");
63 _threads = node->number_child<int> ("Threads");
67 ServerDescription::as_xml (xmlpp::Node* root) const
69 root->add_child("HostName")->add_child_text (_host_name);
70 root->add_child("Threads")->add_child_text (boost::lexical_cast<string> (_threads));
73 /** Create a server description from a string of metadata returned from as_metadata().
75 * @return ServerDescription, or 0.
77 optional<ServerDescription>
78 ServerDescription::create_from_metadata (string v)
81 split (b, v, is_any_of (" "));
84 return optional<ServerDescription> ();
87 return ServerDescription (b[0], atoi (b[1].c_str ()));
90 Server::Server (shared_ptr<Log> log, bool verbose)
98 Server::process (shared_ptr<Socket> socket)
100 uint32_t length = socket->read_uint32 ();
101 scoped_array<char> buffer (new char[length]);
102 socket->read (reinterpret_cast<uint8_t*> (buffer.get()), length);
104 stringstream s (buffer.get());
105 shared_ptr<cxml::Document> xml (new cxml::Document ("EncodingRequest"));
106 xml->read_stream (s);
107 if (xml->number_child<int> ("Version") != SERVER_LINK_VERSION) {
108 cerr << "Mismatched server/client versions\n";
109 _log->log ("Mismatched server/client versions");
114 xml->number_child<int> ("Width"), xml->number_child<int> ("Height")
117 shared_ptr<Image> image (new Image (PIX_FMT_RGB24, size, true));
119 image->read_from_socket (socket);
120 DCPVideoFrame dcp_video_frame (image, xml, _log);
122 shared_ptr<EncodedData> encoded = dcp_video_frame.encode_locally ();
124 encoded->send (socket);
125 } catch (std::exception& e) {
126 _log->log (String::compose (
127 "Send failed; frame %1, data size %2, pixel format %3, image size %4x%5, %6 components",
128 dcp_video_frame.frame(), encoded->size(), image->pixel_format(), image->size().width, image->size().height, image->components()
134 return dcp_video_frame.frame ();
138 Server::worker_thread ()
141 boost::mutex::scoped_lock lock (_worker_mutex);
142 while (_queue.empty ()) {
143 _worker_condition.wait (lock);
146 shared_ptr<Socket> socket = _queue.front ();
153 struct timeval start;
154 gettimeofday (&start, 0);
157 frame = process (socket);
158 } catch (std::exception& e) {
159 _log->log (String::compose ("Error: %1", e.what()));
168 gettimeofday (&end, 0);
170 string const message = String::compose (
171 "Encoded frame %1 from %2 in %3s", frame, socket->socket().remote_endpoint().address().to_string(), seconds(end) - seconds(start)
175 cout << message << "\n";
181 _worker_condition.notify_all ();
186 Server::run (int num_threads)
188 _log->log (String::compose ("Server starting with %1 threads", num_threads));
190 cout << "DCP-o-matic server started with " << num_threads << " threads.\n";
193 for (int i = 0; i < num_threads; ++i) {
194 _worker_threads.push_back (new thread (bind (&Server::worker_thread, this)));
197 _broadcast.thread = new thread (bind (&Server::broadcast_thread, this));
199 boost::asio::io_service io_service;
201 boost::asio::ip::tcp::acceptor acceptor (
203 boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), Config::instance()->server_port_base ())
207 shared_ptr<Socket> socket (new Socket);
208 acceptor.accept (socket->socket ());
210 boost::mutex::scoped_lock lock (_worker_mutex);
212 /* Wait until the queue has gone down a bit */
213 while (int (_queue.size()) >= num_threads * 2) {
214 _worker_condition.wait (lock);
217 _queue.push_back (socket);
218 _worker_condition.notify_all ();
223 Server::broadcast_thread ()
225 boost::asio::io_service io_service;
227 boost::asio::ip::address address = boost::asio::ip::address_v4::any ();
228 boost::asio::ip::udp::endpoint listen_endpoint (address, Config::instance()->server_port_base() + 1);
230 _broadcast.socket = new boost::asio::ip::udp::socket (io_service);
231 _broadcast.socket->open (listen_endpoint.protocol ());
232 _broadcast.socket->bind (listen_endpoint);
234 _broadcast.socket->async_receive_from (
235 boost::asio::buffer (_broadcast.buffer, sizeof (_broadcast.buffer)),
236 _broadcast.send_endpoint,
237 boost::bind (&Server::broadcast_received, this)
244 Server::broadcast_received ()
246 _broadcast.buffer[sizeof(_broadcast.buffer) - 1] = '\0';
248 if (strcmp (_broadcast.buffer, DCPOMATIC_HELLO) == 0) {
249 /* Reply to the client saying what we can do */
251 xmlpp::Element* root = doc.create_root_node ("ServerAvailable");
252 root->add_child("Threads")->add_child_text (lexical_cast<string> (_worker_threads.size ()));
254 doc.write_to_stream (xml, "UTF-8");
256 shared_ptr<Socket> socket (new Socket);
258 socket->connect (boost::asio::ip::tcp::endpoint (_broadcast.send_endpoint.address(), Config::instance()->server_port_base() + 1));
259 socket->write (xml.str().length() + 1);
260 socket->write ((uint8_t *) xml.str().c_str(), xml.str().length() + 1);
266 _broadcast.socket->async_receive_from (
267 boost::asio::buffer (_broadcast.buffer, sizeof (_broadcast.buffer)),
268 _broadcast.send_endpoint, boost::bind (&Server::broadcast_received, this)