2 Copyright (C) 2012-2015 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.
27 #include "dcpomatic_socket.h"
29 #include "dcp_video.h"
32 #include "player_video.h"
34 #include "safe_stringstream.h"
35 #include "raw_convert.h"
36 #include "compose.hpp"
38 #include <libcxml/cxml.h>
39 #include <libxml++/libxml++.h>
40 #include <boost/algorithm/string.hpp>
41 #include <boost/scoped_array.hpp>
48 #define LOG_GENERAL(...) _log->log (String::compose (__VA_ARGS__), Log::TYPE_GENERAL);
49 #define LOG_GENERAL_NC(...) _log->log (__VA_ARGS__, Log::TYPE_GENERAL);
50 #define LOG_ERROR(...) _log->log (String::compose (__VA_ARGS__), Log::TYPE_ERROR);
51 #define LOG_ERROR_NC(...) _log->log (__VA_ARGS__, Log::TYPE_ERROR);
59 using boost::shared_ptr;
62 using boost::scoped_array;
63 using boost::optional;
66 Server::Server (shared_ptr<Log> log, bool verbose)
70 , _acceptor (_io_service, boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), Config::instance()->server_port_base()))
78 boost::mutex::scoped_lock lm (_worker_mutex);
80 _empty_condition.notify_all ();
81 _full_condition.notify_all ();
84 for (vector<boost::thread*>::iterator i = _worker_threads.begin(); i != _worker_threads.end(); ++i) {
91 _broadcast.io_service.stop ();
92 if (_broadcast.thread) {
93 _broadcast.thread->join ();
97 /** @param after_read Filled in with gettimeofday() after reading the input from the network.
98 * @param after_encode Filled in with gettimeofday() after encoding the image.
101 Server::process (shared_ptr<Socket> socket, struct timeval& after_read, struct timeval& after_encode)
103 uint32_t length = socket->read_uint32 ();
104 scoped_array<char> buffer (new char[length]);
105 socket->read (reinterpret_cast<uint8_t*> (buffer.get()), length);
107 string s (buffer.get());
108 shared_ptr<cxml::Document> xml (new cxml::Document ("EncodingRequest"));
109 xml->read_string (s);
110 /* This is a double-check; the server shouldn't even be on the candidate list
111 if it is the wrong version, but it doesn't hurt to make sure here.
113 if (xml->number_child<int> ("Version") != SERVER_LINK_VERSION) {
114 cerr << "Mismatched server/client versions\n";
115 LOG_ERROR_NC ("Mismatched server/client versions");
119 shared_ptr<PlayerVideo> pvf (new PlayerVideo (xml, socket));
121 DCPVideo dcp_video_frame (pvf, xml, _log);
123 gettimeofday (&after_read, 0);
125 Data encoded = dcp_video_frame.encode_locally (boost::bind (&Log::dcp_log, _log.get(), _1, _2));
127 gettimeofday (&after_encode, 0);
130 socket->write (encoded.size ());
131 socket->write (encoded.data ().get (), encoded.size ());
132 } catch (std::exception& e) {
133 cerr << "Send failed; frame " << dcp_video_frame.index() << "\n";
134 LOG_ERROR ("Send failed; frame %1", dcp_video_frame.index());
138 return dcp_video_frame.index ();
142 Server::worker_thread ()
145 boost::mutex::scoped_lock lock (_worker_mutex);
146 while (_queue.empty () && !_terminate) {
147 _empty_condition.wait (lock);
154 shared_ptr<Socket> socket = _queue.front ();
162 struct timeval start;
163 struct timeval after_read;
164 struct timeval after_encode;
167 gettimeofday (&start, 0);
170 frame = process (socket, after_read, after_encode);
171 ip = socket->socket().remote_endpoint().address().to_string();
172 } catch (std::exception& e) {
173 cerr << "Error: " << e.what() << "\n";
174 LOG_ERROR ("Error: %1", e.what());
177 gettimeofday (&end, 0);
185 gettimeofday (&end, 0);
187 SafeStringStream message;
188 message.precision (2);
190 << "Encoded frame " << frame << " from " << ip << ": "
191 << "receive " << (seconds(after_read) - seconds(start)) << "s "
192 << "encode " << (seconds(after_encode) - seconds(after_read)) << "s "
193 << "send " << (seconds(end) - seconds(after_encode)) << "s.";
196 cout << message.str() << "\n";
199 LOG_GENERAL_NC (message.str ());
202 _full_condition.notify_all ();
207 Server::run (int num_threads)
209 LOG_GENERAL ("Server starting with %1 threads", num_threads);
211 cout << "DCP-o-matic server starting with " << num_threads << " threads.\n";
214 for (int i = 0; i < num_threads; ++i) {
215 _worker_threads.push_back (new thread (bind (&Server::worker_thread, this)));
218 _broadcast.thread = new thread (bind (&Server::broadcast_thread, this));
225 Server::broadcast_thread ()
228 boost::asio::ip::address address = boost::asio::ip::address_v4::any ();
229 boost::asio::ip::udp::endpoint listen_endpoint (address, Config::instance()->server_port_base() + 1);
231 _broadcast.socket = new boost::asio::ip::udp::socket (_broadcast.io_service);
232 _broadcast.socket->open (listen_endpoint.protocol ());
233 _broadcast.socket->bind (listen_endpoint);
235 _broadcast.socket->async_receive_from (
236 boost::asio::buffer (_broadcast.buffer, sizeof (_broadcast.buffer)),
237 _broadcast.send_endpoint,
238 boost::bind (&Server::broadcast_received, this)
241 _broadcast.io_service.run ();
249 Server::broadcast_received ()
251 _broadcast.buffer[sizeof(_broadcast.buffer) - 1] = '\0';
253 if (strcmp (_broadcast.buffer, DCPOMATIC_HELLO) == 0) {
254 /* Reply to the client saying what we can do */
256 xmlpp::Element* root = doc.create_root_node ("ServerAvailable");
257 root->add_child("Threads")->add_child_text (raw_convert<string> (_worker_threads.size ()));
258 root->add_child("Version")->add_child_text (raw_convert<string> (SERVER_LINK_VERSION));
259 string xml = doc.write_to_string ("UTF-8");
262 cout << "Offering services to master " << _broadcast.send_endpoint.address().to_string () << "\n";
264 shared_ptr<Socket> socket (new Socket);
266 socket->connect (boost::asio::ip::tcp::endpoint (_broadcast.send_endpoint.address(), Config::instance()->server_port_base() + 1));
267 socket->write (xml.length() + 1);
268 socket->write ((uint8_t *) xml.c_str(), xml.length() + 1);
274 _broadcast.socket->async_receive_from (
275 boost::asio::buffer (_broadcast.buffer, sizeof (_broadcast.buffer)),
276 _broadcast.send_endpoint, boost::bind (&Server::broadcast_received, this)
281 Server::start_accept ()
287 shared_ptr<Socket> socket (new Socket);
288 _acceptor.async_accept (socket->socket (), boost::bind (&Server::handle_accept, this, socket, boost::asio::placeholders::error));
292 Server::handle_accept (shared_ptr<Socket> socket, boost::system::error_code const & error)
298 boost::mutex::scoped_lock lock (_worker_mutex);
300 /* Wait until the queue has gone down a bit */
301 while (_queue.size() >= _worker_threads.size() * 2 && !_terminate) {
302 _full_condition.wait (lock);
305 _queue.push_back (socket);
306 _empty_condition.notify_all ();