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.
29 #include <boost/algorithm/string.hpp>
30 #include <boost/scoped_array.hpp>
31 #include <libcxml/cxml.h>
32 #include <libdcp/raw_convert.h>
37 #include "dcp_video_frame.h"
40 #include "player_video_frame.h"
44 #define LOG_GENERAL(...) _log->log (String::compose (__VA_ARGS__), Log::TYPE_GENERAL);
45 #define LOG_GENERAL_NC(...) _log->log (__VA_ARGS__, Log::TYPE_GENERAL);
46 #define LOG_ERROR(...) _log->log (String::compose (__VA_ARGS__), Log::TYPE_ERROR);
47 #define LOG_ERROR_NC(...) _log->log (__VA_ARGS__, Log::TYPE_ERROR);
50 using std::stringstream;
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 libdcp::raw_convert;
68 Server::Server (shared_ptr<Log> log, bool verbose)
75 /** @param after_read Filled in with gettimeofday() after reading the input from the network.
76 * @param after_encode Filled in with gettimeofday() after encoding the image.
79 Server::process (shared_ptr<Socket> socket, struct timeval& after_read, struct timeval& after_encode)
81 uint32_t length = socket->read_uint32 ();
82 scoped_array<char> buffer (new char[length]);
83 socket->read (reinterpret_cast<uint8_t*> (buffer.get()), length);
85 stringstream s (buffer.get());
86 shared_ptr<cxml::Document> xml (new cxml::Document ("EncodingRequest"));
88 if (xml->number_child<int> ("Version") != SERVER_LINK_VERSION) {
89 cerr << "Mismatched server/client versions\n";
90 LOG_ERROR_NC ("Mismatched server/client versions");
94 shared_ptr<PlayerVideoFrame> pvf (new PlayerVideoFrame (xml, socket, _log));
96 DCPVideoFrame dcp_video_frame (pvf, xml, _log);
98 gettimeofday (&after_read, 0);
100 shared_ptr<EncodedData> encoded = dcp_video_frame.encode_locally ();
102 gettimeofday (&after_encode, 0);
105 encoded->send (socket);
106 } catch (std::exception& e) {
107 LOG_ERROR ("Send failed; frame %1", dcp_video_frame.index());
111 return dcp_video_frame.index ();
115 Server::worker_thread ()
118 boost::mutex::scoped_lock lock (_worker_mutex);
119 while (_queue.empty ()) {
120 _worker_condition.wait (lock);
123 shared_ptr<Socket> socket = _queue.front ();
131 struct timeval start;
132 struct timeval after_read;
133 struct timeval after_encode;
136 gettimeofday (&start, 0);
139 frame = process (socket, after_read, after_encode);
140 ip = socket->socket().remote_endpoint().address().to_string();
141 } catch (std::exception& e) {
142 LOG_ERROR ("Error: %1", e.what());
145 gettimeofday (&end, 0);
153 gettimeofday (&end, 0);
155 stringstream message;
156 message.precision (2);
158 << "Encoded frame " << frame << " from " << ip << ": "
159 << "receive " << (seconds(after_read) - seconds(start)) << "s "
160 << "encode " << (seconds(after_encode) - seconds(after_read)) << "s "
161 << "send " << (seconds(end) - seconds(after_encode)) << "s.";
164 cout << message.str() << "\n";
167 LOG_GENERAL_NC (message.str ());
170 _worker_condition.notify_all ();
175 Server::run (int num_threads)
177 LOG_GENERAL ("Server starting with %1 threads", num_threads);
179 cout << "DCP-o-matic server starting with " << num_threads << " threads.\n";
182 for (int i = 0; i < num_threads; ++i) {
183 _worker_threads.push_back (new thread (bind (&Server::worker_thread, this)));
186 _broadcast.thread = new thread (bind (&Server::broadcast_thread, this));
188 boost::asio::io_service io_service;
190 boost::asio::ip::tcp::acceptor acceptor (
192 boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), Config::instance()->server_port_base ())
196 shared_ptr<Socket> socket (new Socket);
197 acceptor.accept (socket->socket ());
199 boost::mutex::scoped_lock lock (_worker_mutex);
201 /* Wait until the queue has gone down a bit */
202 while (int (_queue.size()) >= num_threads * 2) {
203 _worker_condition.wait (lock);
206 _queue.push_back (socket);
207 _worker_condition.notify_all ();
212 Server::broadcast_thread ()
215 boost::asio::io_service io_service;
217 boost::asio::ip::address address = boost::asio::ip::address_v4::any ();
218 boost::asio::ip::udp::endpoint listen_endpoint (address, Config::instance()->server_port_base() + 1);
220 _broadcast.socket = new boost::asio::ip::udp::socket (io_service);
221 _broadcast.socket->open (listen_endpoint.protocol ());
222 _broadcast.socket->bind (listen_endpoint);
224 _broadcast.socket->async_receive_from (
225 boost::asio::buffer (_broadcast.buffer, sizeof (_broadcast.buffer)),
226 _broadcast.send_endpoint,
227 boost::bind (&Server::broadcast_received, this)
238 Server::broadcast_received ()
240 _broadcast.buffer[sizeof(_broadcast.buffer) - 1] = '\0';
242 if (strcmp (_broadcast.buffer, DCPOMATIC_HELLO) == 0) {
243 /* Reply to the client saying what we can do */
245 xmlpp::Element* root = doc.create_root_node ("ServerAvailable");
246 root->add_child("Threads")->add_child_text (raw_convert<string> (_worker_threads.size ()));
248 doc.write_to_stream (xml, "UTF-8");
250 shared_ptr<Socket> socket (new Socket);
252 socket->connect (boost::asio::ip::tcp::endpoint (_broadcast.send_endpoint.address(), Config::instance()->server_port_base() + 1));
253 socket->write (xml.str().length() + 1);
254 socket->write ((uint8_t *) xml.str().c_str(), xml.str().length() + 1);
260 _broadcast.socket->async_receive_from (
261 boost::asio::buffer (_broadcast.buffer, sizeof (_broadcast.buffer)),
262 _broadcast.send_endpoint, boost::bind (&Server::broadcast_received, this)