+/*
+ Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+/** @file src/encode_server.cc
+ * @brief Class to describe a server to which we can send
+ * encoding work, and a class to implement such a server.
+ */
+
+#include "encode_server.h"
+#include "util.h"
+#include "dcpomatic_socket.h"
+#include "image.h"
+#include "dcp_video.h"
+#include "config.h"
+#include "cross.h"
+#include "player_video.h"
+#include "safe_stringstream.h"
+#include "raw_convert.h"
+#include "compose.hpp"
+#include "log.h"
+#include "encoded_log_entry.h"
+#include <libcxml/cxml.h>
+#include <libxml++/libxml++.h>
+#include <boost/algorithm/string.hpp>
+#include <boost/scoped_array.hpp>
+#include <boost/foreach.hpp>
+#include <string>
+#include <vector>
+#include <iostream>
+
+#include "i18n.h"
+
+#define LOG_GENERAL(...) _log->log (String::compose (__VA_ARGS__), LogEntry::TYPE_GENERAL);
+#define LOG_GENERAL_NC(...) _log->log (__VA_ARGS__, LogEntry::TYPE_GENERAL);
+#define LOG_ERROR(...) _log->log (String::compose (__VA_ARGS__), LogEntry::TYPE_ERROR);
+#define LOG_ERROR_NC(...) _log->log (__VA_ARGS__, LogEntry::TYPE_ERROR);
+
+using std::string;
+using std::vector;
+using std::list;
+using std::cout;
+using std::cerr;
+using std::fixed;
+using boost::shared_ptr;
+using boost::thread;
+using boost::bind;
+using boost::scoped_array;
+using boost::optional;
+using dcp::Size;
+using dcp::Data;
+
+EncodeServer::EncodeServer (shared_ptr<Log> log, bool verbose)
+ : _terminate (false)
+ , _log (log)
+ , _verbose (verbose)
+ , _acceptor (_io_service, boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), Config::instance()->server_port_base()))
+{
+
+}
+
+EncodeServer::~EncodeServer ()
+{
+ {
+ boost::mutex::scoped_lock lm (_worker_mutex);
+ _terminate = true;
+ _empty_condition.notify_all ();
+ _full_condition.notify_all ();
+ }
+
+ BOOST_FOREACH (boost::thread* i, _worker_threads) {
+ DCPOMATIC_ASSERT (i->joinable ());
+ i->join ();
+ delete i;
+ }
+
+ _io_service.stop ();
+
+ _broadcast.io_service.stop ();
+ if (_broadcast.thread) {
+ DCPOMATIC_ASSERT (_broadcast.thread->joinable ());
+ _broadcast.thread->join ();
+ }
+}
+
+/** @param after_read Filled in with gettimeofday() after reading the input from the network.
+ * @param after_encode Filled in with gettimeofday() after encoding the image.
+ */
+int
+EncodeServer::process (shared_ptr<Socket> socket, struct timeval& after_read, struct timeval& after_encode)
+{
+ uint32_t length = socket->read_uint32 ();
+ scoped_array<char> buffer (new char[length]);
+ socket->read (reinterpret_cast<uint8_t*> (buffer.get()), length);
+
+ string s (buffer.get());
+ shared_ptr<cxml::Document> xml (new cxml::Document ("EncodingRequest"));
+ xml->read_string (s);
+ /* This is a double-check; the server shouldn't even be on the candidate list
+ if it is the wrong version, but it doesn't hurt to make sure here.
+ */
+ if (xml->number_child<int> ("Version") != SERVER_LINK_VERSION) {
+ cerr << "Mismatched server/client versions\n";
+ LOG_ERROR_NC ("Mismatched server/client versions");
+ return -1;
+ }
+
+ shared_ptr<PlayerVideo> pvf (new PlayerVideo (xml, socket));
+
+ DCPVideo dcp_video_frame (pvf, xml, _log);
+
+ gettimeofday (&after_read, 0);
+
+ Data encoded = dcp_video_frame.encode_locally (boost::bind (&Log::dcp_log, _log.get(), _1, _2));
+
+ gettimeofday (&after_encode, 0);
+
+ try {
+ socket->write (encoded.size());
+ socket->write (encoded.data().get(), encoded.size());
+ } catch (std::exception& e) {
+ cerr << "Send failed; frame " << dcp_video_frame.index() << "\n";
+ LOG_ERROR ("Send failed; frame %1", dcp_video_frame.index());
+ throw;
+ }
+
+ return dcp_video_frame.index ();
+}
+
+void
+EncodeServer::worker_thread ()
+{
+ while (true) {
+ boost::mutex::scoped_lock lock (_worker_mutex);
+ while (_queue.empty () && !_terminate) {
+ _empty_condition.wait (lock);
+ }
+
+ if (_terminate) {
+ return;
+ }
+
+ shared_ptr<Socket> socket = _queue.front ();
+ _queue.pop_front ();
+
+ lock.unlock ();
+
+ int frame = -1;
+ string ip;
+
+ struct timeval start;
+ struct timeval after_read;
+ struct timeval after_encode;
+ struct timeval end;
+
+ gettimeofday (&start, 0);
+
+ try {
+ frame = process (socket, after_read, after_encode);
+ ip = socket->socket().remote_endpoint().address().to_string();
+ } catch (std::exception& e) {
+ cerr << "Error: " << e.what() << "\n";
+ LOG_ERROR ("Error: %1", e.what());
+ }
+
+ gettimeofday (&end, 0);
+
+ socket.reset ();
+
+ lock.lock ();
+
+ if (frame >= 0) {
+ struct timeval end;
+ gettimeofday (&end, 0);
+
+ shared_ptr<EncodedLogEntry> e (
+ new EncodedLogEntry (
+ frame, ip,
+ seconds(after_read) - seconds(start),
+ seconds(after_encode) - seconds(after_read),
+ seconds(end) - seconds(after_encode)
+ )
+ );
+
+ if (_verbose) {
+ cout << e->get() << "\n";
+ }
+
+ _log->log (e);
+ }
+
+ _full_condition.notify_all ();
+ }
+}
+
+void
+EncodeServer::run (int num_threads)
+{
+ LOG_GENERAL ("Server starting with %1 threads", num_threads);
+ if (_verbose) {
+ cout << "DCP-o-matic server starting with " << num_threads << " threads.\n";
+ }
+
+ for (int i = 0; i < num_threads; ++i) {
+ _worker_threads.push_back (new thread (bind (&EncodeServer::worker_thread, this)));
+ }
+
+ _broadcast.thread = new thread (bind (&EncodeServer::broadcast_thread, this));
+
+ start_accept ();
+ _io_service.run ();
+}
+
+void
+EncodeServer::broadcast_thread ()
+try
+{
+ boost::asio::ip::address address = boost::asio::ip::address_v4::any ();
+ boost::asio::ip::udp::endpoint listen_endpoint (address, Config::instance()->server_port_base() + 1);
+
+ _broadcast.socket = new boost::asio::ip::udp::socket (_broadcast.io_service);
+ _broadcast.socket->open (listen_endpoint.protocol ());
+ _broadcast.socket->bind (listen_endpoint);
+
+ _broadcast.socket->async_receive_from (
+ boost::asio::buffer (_broadcast.buffer, sizeof (_broadcast.buffer)),
+ _broadcast.send_endpoint,
+ boost::bind (&EncodeServer::broadcast_received, this)
+ );
+
+ _broadcast.io_service.run ();
+}
+catch (...)
+{
+ store_current ();
+}
+
+void
+EncodeServer::broadcast_received ()
+{
+ _broadcast.buffer[sizeof(_broadcast.buffer) - 1] = '\0';
+
+ if (strcmp (_broadcast.buffer, DCPOMATIC_HELLO) == 0) {
+ /* Reply to the client saying what we can do */
+ xmlpp::Document doc;
+ xmlpp::Element* root = doc.create_root_node ("ServerAvailable");
+ root->add_child("Threads")->add_child_text (raw_convert<string> (_worker_threads.size ()));
+ root->add_child("Version")->add_child_text (raw_convert<string> (SERVER_LINK_VERSION));
+ string xml = doc.write_to_string ("UTF-8");
+
+ if (_verbose) {
+ cout << "Offering services to master " << _broadcast.send_endpoint.address().to_string () << "\n";
+ }
+ shared_ptr<Socket> socket (new Socket);
+ try {
+ socket->connect (boost::asio::ip::tcp::endpoint (_broadcast.send_endpoint.address(), Config::instance()->server_port_base() + 1));
+ socket->write (xml.length() + 1);
+ socket->write ((uint8_t *) xml.c_str(), xml.length() + 1);
+ } catch (...) {
+
+ }
+ }
+
+ _broadcast.socket->async_receive_from (
+ boost::asio::buffer (_broadcast.buffer, sizeof (_broadcast.buffer)),
+ _broadcast.send_endpoint, boost::bind (&EncodeServer::broadcast_received, this)
+ );
+}
+
+void
+EncodeServer::start_accept ()
+{
+ if (_terminate) {
+ return;
+ }
+
+ shared_ptr<Socket> socket (new Socket);
+ _acceptor.async_accept (socket->socket (), boost::bind (&EncodeServer::handle_accept, this, socket, boost::asio::placeholders::error));
+}
+
+void
+EncodeServer::handle_accept (shared_ptr<Socket> socket, boost::system::error_code const & error)
+{
+ if (error) {
+ return;
+ }
+
+ boost::mutex::scoped_lock lock (_worker_mutex);
+
+ /* Wait until the queue has gone down a bit */
+ while (_queue.size() >= _worker_threads.size() * 2 && !_terminate) {
+ _full_condition.wait (lock);
+ }
+
+ _queue.push_back (socket);
+ _empty_condition.notify_all ();
+
+ start_accept ();
+}
projects / dcpomatic.git / commitdiff