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/encode_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.
25 #include "encode_server.h"
27 #include "dcpomatic_socket.h"
29 #include "dcp_video.h"
32 #include "player_video.h"
33 #include "safe_stringstream.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);
81 _empty_condition.notify_all ();
82 _full_condition.notify_all ();
85 BOOST_FOREACH (boost::thread* i, _worker_threads) {
86 DCPOMATIC_ASSERT (i->joinable ());
91 _broadcast.io_service.stop ();
92 if (_broadcast.thread) {
93 DCPOMATIC_ASSERT (_broadcast.thread->joinable ());
94 _broadcast.thread->join ();
98 /** @param after_read Filled in with gettimeofday() after reading the input from the network.
99 * @param after_encode Filled in with gettimeofday() after encoding the image.
102 EncodeServer::process (shared_ptr<Socket> socket, struct timeval& after_read, struct timeval& after_encode)
104 uint32_t length = socket->read_uint32 ();
105 scoped_array<char> buffer (new char[length]);
106 socket->read (reinterpret_cast<uint8_t*> (buffer.get()), length);
108 string s (buffer.get());
109 shared_ptr<cxml::Document> xml (new cxml::Document ("EncodingRequest"));
110 xml->read_string (s);
111 /* This is a double-check; the server shouldn't even be on the candidate list
112 if it is the wrong version, but it doesn't hurt to make sure here.
114 if (xml->number_child<int> ("Version") != SERVER_LINK_VERSION) {
115 cerr << "Mismatched server/client versions\n";
116 LOG_ERROR_NC ("Mismatched server/client versions");
120 shared_ptr<PlayerVideo> pvf (new PlayerVideo (xml, socket));
122 DCPVideo dcp_video_frame (pvf, xml, _log);
124 gettimeofday (&after_read, 0);
126 Data encoded = dcp_video_frame.encode_locally (boost::bind (&Log::dcp_log, _log.get(), _1, _2));
128 gettimeofday (&after_encode, 0);
131 socket->write (encoded.size());
132 socket->write (encoded.data().get(), encoded.size());
133 } catch (std::exception& e) {
134 cerr << "Send failed; frame " << dcp_video_frame.index() << "\n";
135 LOG_ERROR ("Send failed; frame %1", dcp_video_frame.index());
139 return dcp_video_frame.index ();
143 EncodeServer::worker_thread ()
146 boost::mutex::scoped_lock lock (_mutex);
147 while (_queue.empty () && !_terminate) {
148 _empty_condition.wait (lock);
155 shared_ptr<Socket> socket = _queue.front ();
163 struct timeval start;
164 struct timeval after_read;
165 struct timeval after_encode;
168 gettimeofday (&start, 0);
171 frame = process (socket, after_read, after_encode);
172 ip = socket->socket().remote_endpoint().address().to_string();
173 } catch (std::exception& e) {
174 cerr << "Error: " << e.what() << "\n";
175 LOG_ERROR ("Error: %1", e.what());
178 gettimeofday (&end, 0);
186 gettimeofday (&end, 0);
188 shared_ptr<EncodedLogEntry> e (
189 new EncodedLogEntry (
191 seconds(after_read) - seconds(start),
192 seconds(after_encode) - seconds(after_read),
193 seconds(end) - seconds(after_encode)
198 cout << e->get() << "\n";
204 _full_condition.notify_all ();
211 LOG_GENERAL ("Server starting with %1 threads", _num_threads);
213 cout << "DCP-o-matic server starting with " << _num_threads << " threads.\n";
216 for (int i = 0; i < _num_threads; ++i) {
217 _worker_threads.push_back (new thread (bind (&EncodeServer::worker_thread, this)));
220 _broadcast.thread = new thread (bind (&EncodeServer::broadcast_thread, this));
226 EncodeServer::broadcast_thread ()
229 boost::asio::ip::address address = boost::asio::ip::address_v4::any ();
230 boost::asio::ip::udp::endpoint listen_endpoint (address, Config::instance()->server_port_base() + 1);
232 _broadcast.socket = new boost::asio::ip::udp::socket (_broadcast.io_service);
233 _broadcast.socket->open (listen_endpoint.protocol ());
234 _broadcast.socket->bind (listen_endpoint);
236 _broadcast.socket->async_receive_from (
237 boost::asio::buffer (_broadcast.buffer, sizeof (_broadcast.buffer)),
238 _broadcast.send_endpoint,
239 boost::bind (&EncodeServer::broadcast_received, this)
242 _broadcast.io_service.run ();
250 EncodeServer::broadcast_received ()
252 _broadcast.buffer[sizeof(_broadcast.buffer) - 1] = '\0';
254 if (strcmp (_broadcast.buffer, DCPOMATIC_HELLO) == 0) {
255 /* Reply to the client saying what we can do */
257 xmlpp::Element* root = doc.create_root_node ("ServerAvailable");
258 root->add_child("Threads")->add_child_text (raw_convert<string> (_worker_threads.size ()));
259 root->add_child("Version")->add_child_text (raw_convert<string> (SERVER_LINK_VERSION));
260 string xml = doc.write_to_string ("UTF-8");
263 cout << "Offering services to master " << _broadcast.send_endpoint.address().to_string () << "\n";
265 shared_ptr<Socket> socket (new Socket);
267 socket->connect (boost::asio::ip::tcp::endpoint (_broadcast.send_endpoint.address(), Config::instance()->server_port_base() + 1));
268 socket->write (xml.length() + 1);
269 socket->write ((uint8_t *) xml.c_str(), xml.length() + 1);
275 _broadcast.socket->async_receive_from (
276 boost::asio::buffer (_broadcast.buffer, sizeof (_broadcast.buffer)),
277 _broadcast.send_endpoint, boost::bind (&EncodeServer::broadcast_received, this)
282 EncodeServer::handle (shared_ptr<Socket> socket)
284 boost::mutex::scoped_lock lock (_mutex);
286 /* Wait until the queue has gone down a bit */
287 while (_queue.size() >= _worker_threads.size() * 2 && !_terminate) {
288 _full_condition.wait (lock);
291 _queue.push_back (socket);
292 _empty_condition.notify_all ();