2 Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
21 /** @file src/encode_server.cc
22 * @brief Class to describe a server to which we can send
23 * encoding work, and a class to implement such a server.
26 #include "encode_server.h"
28 #include "dcpomatic_socket.h"
30 #include "dcp_video.h"
33 #include "player_video.h"
34 #include "raw_convert.h"
35 #include "compose.hpp"
37 #include "encoded_log_entry.h"
38 #include <libcxml/cxml.h>
39 #include <libxml++/libxml++.h>
40 #include <boost/algorithm/string.hpp>
41 #include <boost/scoped_array.hpp>
42 #include <boost/foreach.hpp>
49 #define LOG_GENERAL(...) _log->log (String::compose (__VA_ARGS__), LogEntry::TYPE_GENERAL);
50 #define LOG_GENERAL_NC(...) _log->log (__VA_ARGS__, LogEntry::TYPE_GENERAL);
51 #define LOG_ERROR(...) _log->log (String::compose (__VA_ARGS__), LogEntry::TYPE_ERROR);
52 #define LOG_ERROR_NC(...) _log->log (__VA_ARGS__, LogEntry::TYPE_ERROR);
60 using boost::shared_ptr;
63 using boost::scoped_array;
64 using boost::optional;
68 EncodeServer::EncodeServer (shared_ptr<Log> log, bool verbose, int num_threads)
69 : Server (Config::instance()->server_port_base())
72 , _num_threads (num_threads)
77 EncodeServer::~EncodeServer ()
80 boost::mutex::scoped_lock lm (_mutex);
82 _empty_condition.notify_all ();
83 _full_condition.notify_all ();
86 BOOST_FOREACH (boost::thread* i, _worker_threads) {
87 /* Ideally this would be a DCPOMATIC_ASSERT(i->joinable()) but we
88 can't throw exceptions from a destructor.
96 _broadcast.io_service.stop ();
97 if (_broadcast.thread) {
98 /* Ideally this would be a DCPOMATIC_ASSERT(_broadcast.thread->joinable()) but we
99 can't throw exceptions from a destructor.
101 if (_broadcast.thread->joinable ()) {
102 _broadcast.thread->join ();
107 /** @param after_read Filled in with gettimeofday() after reading the input from the network.
108 * @param after_encode Filled in with gettimeofday() after encoding the image.
111 EncodeServer::process (shared_ptr<Socket> socket, struct timeval& after_read, struct timeval& after_encode)
113 uint32_t length = socket->read_uint32 ();
114 scoped_array<char> buffer (new char[length]);
115 socket->read (reinterpret_cast<uint8_t*> (buffer.get()), length);
117 string s (buffer.get());
118 shared_ptr<cxml::Document> xml (new cxml::Document ("EncodingRequest"));
119 xml->read_string (s);
120 /* This is a double-check; the server shouldn't even be on the candidate list
121 if it is the wrong version, but it doesn't hurt to make sure here.
123 if (xml->number_child<int> ("Version") != SERVER_LINK_VERSION) {
124 cerr << "Mismatched server/client versions\n";
125 LOG_ERROR_NC ("Mismatched server/client versions");
129 shared_ptr<PlayerVideo> pvf (new PlayerVideo (xml, socket));
131 DCPVideo dcp_video_frame (pvf, xml, _log);
133 gettimeofday (&after_read, 0);
135 Data encoded = dcp_video_frame.encode_locally (boost::bind (&Log::dcp_log, _log.get(), _1, _2));
137 gettimeofday (&after_encode, 0);
140 socket->write (encoded.size());
141 socket->write (encoded.data().get(), encoded.size());
142 } catch (std::exception& e) {
143 cerr << "Send failed; frame " << dcp_video_frame.index() << "\n";
144 LOG_ERROR ("Send failed; frame %1", dcp_video_frame.index());
148 return dcp_video_frame.index ();
152 EncodeServer::worker_thread ()
155 boost::mutex::scoped_lock lock (_mutex);
156 while (_queue.empty () && !_terminate) {
157 _empty_condition.wait (lock);
164 shared_ptr<Socket> socket = _queue.front ();
172 struct timeval start;
173 struct timeval after_read;
174 struct timeval after_encode;
177 gettimeofday (&start, 0);
180 frame = process (socket, after_read, after_encode);
181 ip = socket->socket().remote_endpoint().address().to_string();
182 } catch (std::exception& e) {
183 cerr << "Error: " << e.what() << "\n";
184 LOG_ERROR ("Error: %1", e.what());
187 gettimeofday (&end, 0);
195 gettimeofday (&end, 0);
197 shared_ptr<EncodedLogEntry> e (
198 new EncodedLogEntry (
200 seconds(after_read) - seconds(start),
201 seconds(after_encode) - seconds(after_read),
202 seconds(end) - seconds(after_encode)
207 cout << e->get() << "\n";
213 _full_condition.notify_all ();
220 LOG_GENERAL ("Server starting with %1 threads", _num_threads);
222 cout << "DCP-o-matic server starting with " << _num_threads << " threads.\n";
225 for (int i = 0; i < _num_threads; ++i) {
226 _worker_threads.push_back (new thread (bind (&EncodeServer::worker_thread, this)));
229 _broadcast.thread = new thread (bind (&EncodeServer::broadcast_thread, this));
235 EncodeServer::broadcast_thread ()
238 boost::asio::ip::address address = boost::asio::ip::address_v4::any ();
239 boost::asio::ip::udp::endpoint listen_endpoint (address, Config::instance()->server_port_base() + 1);
241 _broadcast.socket = new boost::asio::ip::udp::socket (_broadcast.io_service);
242 _broadcast.socket->open (listen_endpoint.protocol ());
243 _broadcast.socket->bind (listen_endpoint);
245 _broadcast.socket->async_receive_from (
246 boost::asio::buffer (_broadcast.buffer, sizeof (_broadcast.buffer)),
247 _broadcast.send_endpoint,
248 boost::bind (&EncodeServer::broadcast_received, this)
251 _broadcast.io_service.run ();
259 EncodeServer::broadcast_received ()
261 _broadcast.buffer[sizeof(_broadcast.buffer) - 1] = '\0';
263 if (strcmp (_broadcast.buffer, DCPOMATIC_HELLO) == 0) {
264 /* Reply to the client saying what we can do */
266 xmlpp::Element* root = doc.create_root_node ("ServerAvailable");
267 root->add_child("Threads")->add_child_text (raw_convert<string> (_worker_threads.size ()));
268 root->add_child("Version")->add_child_text (raw_convert<string> (SERVER_LINK_VERSION));
269 string xml = doc.write_to_string ("UTF-8");
272 cout << "Offering services to master " << _broadcast.send_endpoint.address().to_string () << "\n";
274 shared_ptr<Socket> socket (new Socket);
276 socket->connect (boost::asio::ip::tcp::endpoint (_broadcast.send_endpoint.address(), Config::instance()->server_port_base() + 1));
277 socket->write (xml.length() + 1);
278 socket->write ((uint8_t *) xml.c_str(), xml.length() + 1);
284 _broadcast.socket->async_receive_from (
285 boost::asio::buffer (_broadcast.buffer, sizeof (_broadcast.buffer)),
286 _broadcast.send_endpoint, boost::bind (&EncodeServer::broadcast_received, this)
291 EncodeServer::handle (shared_ptr<Socket> socket)
293 boost::mutex::scoped_lock lock (_mutex);
295 /* Wait until the queue has gone down a bit */
296 while (_queue.size() >= _worker_threads.size() * 2 && !_terminate) {
297 _full_condition.wait (lock);
300 _queue.push_back (socket);
301 _empty_condition.notify_all ();