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>
34 #include "dcp_video_frame.h"
39 using namespace boost;
41 /** Create a server description from a string of metadata returned from as_metadata().
43 * @return ServerDescription, or 0.
46 ServerDescription::create_from_metadata (string v)
49 split (b, v, is_any_of (" "));
55 return new ServerDescription (b[0], atoi (b[1].c_str ()));
58 /** @return Description of this server as text */
60 ServerDescription::as_metadata () const
63 s << _host_name << " " << _threads;
67 Server::Server (Log* log)
74 Server::process (shared_ptr<Socket> socket)
77 socket->read_indefinite ((uint8_t *) buffer, sizeof (buffer), 30);
78 socket->consume (strlen (buffer) + 1);
80 stringstream s (buffer);
84 if (command != "encode") {
96 float frames_per_second;
100 Position subtitle_position;
103 s >> in_size.width >> in_size.height
105 >> out_size.width >> out_size.height
115 >> subtitle_position.x >> subtitle_position.y
116 >> subtitle_size.width >> subtitle_size.height;
118 PixelFormat pixel_format = (PixelFormat) pixel_format_int;
119 Scaler const * scaler = Scaler::from_id (scaler_id);
120 if (post_process == "none") {
124 shared_ptr<Image> image (new AlignedImage (pixel_format, in_size));
126 image->read_from_socket (socket);
128 shared_ptr<Subtitle> sub;
129 if (subtitle_position.x != -1) {
130 shared_ptr<Image> subtitle_image (new AlignedImage (PIX_FMT_RGBA, subtitle_size));
131 subtitle_image->read_from_socket (socket);
132 sub.reset (new Subtitle (subtitle_position, subtitle_image));
135 DCPVideoFrame dcp_video_frame (
136 image, sub, out_size, padding, subtitle_offset, subtitle_scale,
137 scaler, frame, frames_per_second, post_process, colour_lut_index, j2k_bandwidth, _log
140 shared_ptr<EncodedData> encoded = dcp_video_frame.encode_locally ();
141 encoded->send (socket);
147 Server::worker_thread ()
150 mutex::scoped_lock lock (_worker_mutex);
151 while (_queue.empty ()) {
152 _worker_condition.wait (lock);
155 shared_ptr<Socket> socket = _queue.front ();
162 struct timeval start;
163 gettimeofday (&start, 0);
166 frame = process (socket);
167 } catch (std::exception& e) {
168 cerr << "Error: " << e.what() << "\n";
177 gettimeofday (&end, 0);
178 _log->log (String::compose ("Encoded frame %1 in %2", frame, seconds (end) - seconds (start)));
181 _worker_condition.notify_all ();
186 Server::run (int num_threads)
188 _log->log (String::compose ("Server starting with %1 threads", num_threads));
190 for (int i = 0; i < num_threads; ++i) {
191 _worker_threads.push_back (new thread (bind (&Server::worker_thread, this)));
194 asio::io_service io_service;
195 asio::ip::tcp::acceptor acceptor (io_service, asio::ip::tcp::endpoint (asio::ip::tcp::v4(), Config::instance()->server_port ()));
197 shared_ptr<Socket> socket (new Socket);
198 acceptor.accept (socket->socket ());
200 mutex::scoped_lock lock (_worker_mutex);
202 /* Wait until the queue has gone down a bit */
203 while (int (_queue.size()) >= num_threads * 2) {
204 _worker_condition.wait (lock);
207 _queue.push_back (socket);
208 _worker_condition.notify_all ();