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>
35 #include "dcp_video_frame.h"
40 using namespace boost;
42 /** Create a server description from a string of metadata returned from as_metadata().
44 * @return ServerDescription, or 0.
47 ServerDescription::create_from_metadata (string v)
50 split (b, v, is_any_of (" "));
56 return new ServerDescription (b[0], atoi (b[1].c_str ()));
59 /** @return Description of this server as text */
61 ServerDescription::as_metadata () const
64 s << _host_name << " " << _threads;
68 Server::Server (Log* log)
75 Server::process (shared_ptr<Socket> socket)
78 socket->read_indefinite ((uint8_t *) buffer, sizeof (buffer), 30);
79 socket->consume (strlen (buffer) + 1);
81 stringstream s (buffer);
82 multimap<string, string> kv = read_key_value (s);
84 if (get_required_string (kv, "encode") != "please") {
88 Size in_size (get_required_int (kv, "input_width"), get_required_int (kv, "input_height"));
89 int pixel_format_int = get_required_int (kv, "input_pixel_format");
90 Size out_size (get_required_int (kv, "output_width"), get_required_int (kv, "output_height"));
91 int padding = get_required_int (kv, "padding");
92 int subtitle_offset = get_required_int (kv, "subtitle_offset");
93 float subtitle_scale = get_required_float (kv, "subtitle_scale");
94 string scaler_id = get_required_string (kv, "scaler");
95 int frame = get_required_int (kv, "frame");
96 int frames_per_second = get_required_int (kv, "frames_per_second");
97 string post_process = get_optional_string (kv, "post_process");
98 int colour_lut_index = get_required_int (kv, "colour_lut");
99 int j2k_bandwidth = get_required_int (kv, "j2k_bandwidth");
100 Position subtitle_position (get_optional_int (kv, "subtitle_x"), get_optional_int (kv, "subtitle_y"));
101 Size subtitle_size (get_optional_int (kv, "subtitle_width"), get_optional_int (kv, "subtitle_height"));
103 /* This checks that colour_lut_index is within range */
104 colour_lut_index_to_name (colour_lut_index);
106 PixelFormat pixel_format = (PixelFormat) pixel_format_int;
107 Scaler const * scaler = Scaler::from_id (scaler_id);
109 shared_ptr<Image> image (new AlignedImage (pixel_format, in_size));
111 image->read_from_socket (socket);
113 shared_ptr<Subtitle> sub;
114 if (subtitle_size.width && subtitle_size.height) {
115 shared_ptr<Image> subtitle_image (new AlignedImage (PIX_FMT_RGBA, subtitle_size));
116 subtitle_image->read_from_socket (socket);
117 sub.reset (new Subtitle (subtitle_position, subtitle_image));
120 DCPVideoFrame dcp_video_frame (
121 image, sub, out_size, padding, subtitle_offset, subtitle_scale,
122 scaler, frame, frames_per_second, post_process, colour_lut_index, j2k_bandwidth, _log
125 shared_ptr<EncodedData> encoded = dcp_video_frame.encode_locally ();
126 encoded->send (socket);
132 Server::worker_thread ()
135 mutex::scoped_lock lock (_worker_mutex);
136 while (_queue.empty ()) {
137 _worker_condition.wait (lock);
140 shared_ptr<Socket> socket = _queue.front ();
147 struct timeval start;
148 gettimeofday (&start, 0);
151 frame = process (socket);
152 } catch (std::exception& e) {
153 cerr << "Error: " << e.what() << "\n";
162 gettimeofday (&end, 0);
163 _log->log (String::compose ("Encoded frame %1 in %2", frame, seconds (end) - seconds (start)));
166 _worker_condition.notify_all ();
171 Server::run (int num_threads)
173 _log->log (String::compose ("Server starting with %1 threads", num_threads));
175 for (int i = 0; i < num_threads; ++i) {
176 _worker_threads.push_back (new thread (bind (&Server::worker_thread, this)));
179 asio::io_service io_service;
180 asio::ip::tcp::acceptor acceptor (io_service, asio::ip::tcp::endpoint (asio::ip::tcp::v4(), Config::instance()->server_port ()));
182 shared_ptr<Socket> socket (new Socket);
183 acceptor.accept (socket->socket ());
185 mutex::scoped_lock lock (_worker_mutex);
187 /* Wait until the queue has gone down a bit */
188 while (int (_queue.size()) >= num_threads * 2) {
189 _worker_condition.wait (lock);
192 _queue.push_back (socket);
193 _worker_condition.notify_all ();