2 Copyright (C) 2012-2014 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.
28 #include <boost/algorithm/string.hpp>
29 #include <boost/scoped_array.hpp>
30 #include <libcxml/cxml.h>
31 #include <dcp/raw_convert.h>
36 #include "dcp_video.h"
39 #include "player_video.h"
40 #include "encoded_data.h"
41 #include "safe_stringstream.h"
45 #define LOG_GENERAL(...) _log->log (String::compose (__VA_ARGS__), Log::TYPE_GENERAL);
46 #define LOG_GENERAL_NC(...) _log->log (__VA_ARGS__, Log::TYPE_GENERAL);
47 #define LOG_ERROR(...) _log->log (String::compose (__VA_ARGS__), Log::TYPE_ERROR);
48 #define LOG_ERROR_NC(...) _log->log (__VA_ARGS__, Log::TYPE_ERROR);
56 using std::setprecision;
58 using boost::shared_ptr;
59 using boost::algorithm::is_any_of;
60 using boost::algorithm::split;
63 using boost::scoped_array;
64 using boost::optional;
66 using dcp::raw_convert;
68 Server::Server (shared_ptr<Log> log, bool verbose)
72 , _acceptor (_io_service, boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), Config::instance()->server_port_base()))
80 boost::mutex::scoped_lock lm (_worker_mutex);
82 _empty_condition.notify_all ();
85 for (vector<boost::thread*>::iterator i = _worker_threads.begin(); i != _worker_threads.end(); ++i) {
92 _broadcast.io_service.stop ();
93 _broadcast.thread->join ();
96 /** @param after_read Filled in with gettimeofday() after reading the input from the network.
97 * @param after_encode Filled in with gettimeofday() after encoding the image.
100 Server::process (shared_ptr<Socket> socket, struct timeval& after_read, struct timeval& after_encode)
102 uint32_t length = socket->read_uint32 ();
103 scoped_array<char> buffer (new char[length]);
104 socket->read (reinterpret_cast<uint8_t*> (buffer.get()), length);
106 string s (buffer.get());
107 shared_ptr<cxml::Document> xml (new cxml::Document ("EncodingRequest"));
108 xml->read_string (s);
109 if (xml->number_child<int> ("Version") != SERVER_LINK_VERSION) {
110 cerr << "Mismatched server/client versions\n";
111 LOG_ERROR_NC ("Mismatched server/client versions");
115 shared_ptr<PlayerVideo> pvf (new PlayerVideo (xml, socket, _log));
117 DCPVideo dcp_video_frame (pvf, xml, _log);
119 gettimeofday (&after_read, 0);
121 shared_ptr<EncodedData> encoded = dcp_video_frame.encode_locally ();
123 gettimeofday (&after_encode, 0);
126 encoded->send (socket);
127 } catch (std::exception& e) {
128 cerr << "Send failed; frame " << dcp_video_frame.index() << "\n";
129 LOG_ERROR ("Send failed; frame %1", dcp_video_frame.index());
133 return dcp_video_frame.index ();
137 Server::worker_thread ()
140 boost::mutex::scoped_lock lock (_worker_mutex);
141 while (_queue.empty () && !_terminate) {
142 _empty_condition.wait (lock);
149 shared_ptr<Socket> socket = _queue.front ();
157 struct timeval start;
158 struct timeval after_read;
159 struct timeval after_encode;
162 gettimeofday (&start, 0);
165 frame = process (socket, after_read, after_encode);
166 ip = socket->socket().remote_endpoint().address().to_string();
167 } catch (std::exception& e) {
168 cerr << "Error: " << e.what() << "\n";
169 LOG_ERROR ("Error: %1", e.what());
172 gettimeofday (&end, 0);
180 gettimeofday (&end, 0);
182 SafeStringStream message;
183 message.precision (2);
185 << "Encoded frame " << frame << " from " << ip << ": "
186 << "receive " << (seconds(after_read) - seconds(start)) << "s "
187 << "encode " << (seconds(after_encode) - seconds(after_read)) << "s "
188 << "send " << (seconds(end) - seconds(after_encode)) << "s.";
191 cout << message.str() << "\n";
194 LOG_GENERAL_NC (message.str ());
197 _full_condition.notify_all ();
202 Server::run (int num_threads)
204 LOG_GENERAL ("Server starting with %1 threads", num_threads);
206 cout << "DCP-o-matic server starting with " << num_threads << " threads.\n";
209 for (int i = 0; i < num_threads; ++i) {
210 _worker_threads.push_back (new thread (bind (&Server::worker_thread, this)));
213 _broadcast.thread = new thread (bind (&Server::broadcast_thread, this));
220 Server::broadcast_thread ()
223 boost::asio::ip::address address = boost::asio::ip::address_v4::any ();
224 boost::asio::ip::udp::endpoint listen_endpoint (address, Config::instance()->server_port_base() + 1);
226 _broadcast.socket = new boost::asio::ip::udp::socket (_broadcast.io_service);
227 _broadcast.socket->open (listen_endpoint.protocol ());
228 _broadcast.socket->bind (listen_endpoint);
230 _broadcast.socket->async_receive_from (
231 boost::asio::buffer (_broadcast.buffer, sizeof (_broadcast.buffer)),
232 _broadcast.send_endpoint,
233 boost::bind (&Server::broadcast_received, this)
236 _broadcast.io_service.run ();
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 (raw_convert<string> (_worker_threads.size ()));
253 string xml = doc.write_to_string ("UTF-8");
255 shared_ptr<Socket> socket (new Socket);
257 socket->connect (boost::asio::ip::tcp::endpoint (_broadcast.send_endpoint.address(), Config::instance()->server_port_base() + 1));
258 socket->write (xml.length() + 1);
259 socket->write ((uint8_t *) xml.c_str(), xml.length() + 1);
265 _broadcast.socket->async_receive_from (
266 boost::asio::buffer (_broadcast.buffer, sizeof (_broadcast.buffer)),
267 _broadcast.send_endpoint, boost::bind (&Server::broadcast_received, this)
272 Server::start_accept ()
278 shared_ptr<Socket> socket (new Socket);
279 _acceptor.async_accept (socket->socket (), boost::bind (&Server::handle_accept, this, socket, boost::asio::placeholders::error));
283 Server::handle_accept (shared_ptr<Socket> socket, boost::system::error_code const & error)
289 boost::mutex::scoped_lock lock (_worker_mutex);
291 /* Wait until the queue has gone down a bit */
292 while (_queue.size() >= _worker_threads.size() * 2 && !_terminate) {
293 _full_condition.wait (lock);
296 _queue.push_back (socket);
297 _empty_condition.notify_all ();