2 Copyright (C) 2012 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/lexical_cast.hpp>
31 #include <boost/scoped_array.hpp>
32 #include <libcxml/cxml.h>
37 #include "dcp_video_frame.h"
44 using std::stringstream;
47 using boost::shared_ptr;
48 using boost::algorithm::is_any_of;
49 using boost::algorithm::split;
52 using boost::scoped_array;
55 ServerDescription::ServerDescription (shared_ptr<const cxml::Node> node)
57 _host_name = node->string_child ("HostName");
58 _threads = node->number_child<int> ("Threads");
62 ServerDescription::as_xml (xmlpp::Node* root) const
64 root->add_child("HostName")->add_child_text (_host_name);
65 root->add_child("Threads")->add_child_text (boost::lexical_cast<string> (_threads));
68 /** Create a server description from a string of metadata returned from as_metadata().
70 * @return ServerDescription, or 0.
73 ServerDescription::create_from_metadata (string v)
76 split (b, v, is_any_of (N_(" ")));
82 return new ServerDescription (b[0], atoi (b[1].c_str ()));
85 Server::Server (shared_ptr<Log> log)
92 Server::process (shared_ptr<Socket> socket)
94 uint32_t length = socket->read_uint32 ();
95 scoped_array<char> buffer (new char[length]);
96 socket->read (reinterpret_cast<uint8_t*> (buffer.get()), length);
98 stringstream s (buffer.get());
99 multimap<string, string> kv = read_key_value (s);
101 if (get_required_string (kv, "encode") != "please") {
105 libdcp::Size size (get_required_int (kv, "width"), get_required_int (kv, "height"));
106 int frame = get_required_int (kv, "frame");
107 int frames_per_second = get_required_int (kv, "frames_per_second");
108 int colour_lut_index = get_required_int (kv, "colour_lut");
109 int j2k_bandwidth = get_required_int (kv, "j2k_bandwidth");
111 /* This checks that colour_lut_index is within range */
112 colour_lut_index_to_name (colour_lut_index);
114 shared_ptr<Image> image (new SimpleImage (PIX_FMT_RGB24, size, true));
116 image->read_from_socket (socket);
118 DCPVideoFrame dcp_video_frame (
119 image, frame, frames_per_second, colour_lut_index, j2k_bandwidth, _log
122 shared_ptr<EncodedData> encoded = dcp_video_frame.encode_locally ();
124 encoded->send (socket);
125 } catch (std::exception& e) {
126 _log->log (String::compose (
127 N_("Send failed; frame %1, data size %2, pixel format %3, image size %4x%5, %6 components"),
128 frame, encoded->size(), image->pixel_format(), image->size().width, image->size().height, image->components()
138 Server::worker_thread ()
141 boost::mutex::scoped_lock lock (_worker_mutex);
142 while (_queue.empty ()) {
143 _worker_condition.wait (lock);
146 shared_ptr<Socket> socket = _queue.front ();
153 struct timeval start;
154 gettimeofday (&start, 0);
157 frame = process (socket);
158 } catch (std::exception& e) {
159 _log->log (String::compose (N_("Error: %1"), e.what()));
168 gettimeofday (&end, 0);
169 _log->log (String::compose (N_("Encoded frame %1 in %2"), frame, seconds (end) - seconds (start)));
172 _worker_condition.notify_all ();
177 Server::run (int num_threads)
179 _log->log (String::compose (N_("Server starting with %1 threads"), num_threads));
181 for (int i = 0; i < num_threads; ++i) {
182 _worker_threads.push_back (new thread (bind (&Server::worker_thread, this)));
185 boost::asio::io_service io_service;
186 boost::asio::ip::tcp::acceptor acceptor (io_service, boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), Config::instance()->server_port ()));
188 shared_ptr<Socket> socket (new Socket);
189 acceptor.accept (socket->socket ());
191 boost::mutex::scoped_lock lock (_worker_mutex);
193 /* Wait until the queue has gone down a bit */
194 while (int (_queue.size()) >= num_threads * 2) {
195 _worker_condition.wait (lock);
198 _queue.push_back (socket);
199 _worker_condition.notify_all ();