Rearrange encoding so that the different methods / backends are not all crammed into DCPVideo.

1 files changed, 108 insertions, 0 deletions

diff --git a/src/lib/j2k_encoder_remote_backend.cc b/src/lib/j2k_encoder_remote_backend.cc
new file mode 100644
index 000000000..831134718
--- /dev/null
+++ b/src/lib/j2k_encoder_remote_backend.cc
@@ -0,0 +1,108 @@
+#include "config.h"
+#include "cross.h"
+#include "dcp_video.h"
+#include "dcpomatic_log.h"
+#include "dcpomatic_socket.h"
+#include "encode_server_description.h"
+#include "j2k_encoder_remote_backend.h"
+#include "player_video.h"
+#include "warnings.h"
+#include <dcp/raw_convert.h>
+DCPOMATIC_DISABLE_WARNINGS
+#include <libxml++/libxml++.h>
+DCPOMATIC_ENABLE_WARNINGS
+#include <boost/asio.hpp>
+#include <boost/thread.hpp>
+
+#include "i18n.h"
+
+
+using std::string;
+using boost::optional;
+using boost::shared_ptr;
+using dcp::Data;
+using dcp::raw_convert;
+
+
+J2KEncoderRemoteBackend::J2KEncoderRemoteBackend (EncodeServerDescription server)
+	: _server (server)
+	, _backoff (0)
+{
+
+}
+
+
+optional<Data>
+J2KEncoderRemoteBackend::encode (shared_ptr<DCPVideo> video)
+{
+	int const timeout = 30;
+
+	try {
+		boost::asio::io_service io_service;
+		boost::asio::ip::tcp::resolver resolver (io_service);
+		boost::asio::ip::tcp::resolver::query query (_server.host_name(), raw_convert<string>(ENCODE_FRAME_PORT));
+		boost::asio::ip::tcp::resolver::iterator endpoint_iterator = resolver.resolve (query);
+
+		shared_ptr<Socket> socket (new Socket(timeout));
+
+		socket->connect (*endpoint_iterator);
+
+		/* Collect all XML metadata */
+		xmlpp::Document doc;
+		xmlpp::Element* root = doc.create_root_node ("EncodingRequest");
+		root->add_child("Version")->add_child_text(raw_convert<string> (SERVER_LINK_VERSION));
+		video->add_metadata (root);
+
+		LOG_DEBUG_ENCODE (N_("Sending frame %1 to remote"), video->index());
+
+		{
+			Socket::WriteDigestScope ds (socket);
+
+			/* Send XML metadata */
+			string xml = doc.write_to_string ("UTF-8");
+			socket->write (xml.length() + 1);
+			socket->write ((uint8_t *) xml.c_str(), xml.length() + 1);
+
+			/* Send binary data */
+			LOG_TIMING("start-remote-send thread=%1", thread_id());
+			video->frame()->write_to_socket(socket);
+		}
+
+		/* Read the response (JPEG2000-encoded data); this blocks until the data
+		   is ready and sent back.
+		*/
+		Socket::ReadDigestScope ds (socket);
+		LOG_TIMING("start-remote-encode thread=%1", thread_id());
+		Data e (socket->read_uint32 ());
+		LOG_TIMING("start-remote-receive thread=%1", thread_id());
+		socket->read (e.data().get(), e.size());
+		LOG_TIMING("finish-remote-receive thread=%1", thread_id());
+		if (!ds.check()) {
+			throw NetworkError ("Checksums do not match");
+		}
+
+		LOG_DEBUG_ENCODE (N_("Finished remotely-encoded frame %1"), video->index());
+
+		if (_backoff > 0) {
+			LOG_GENERAL ("%1 was lost, but now she is found; removing backoff", _server.host_name());
+		}
+
+		/* This job succeeded, so remove any backoff */
+		_backoff = 0;
+
+		return e;
+
+	} catch (std::exception& e) {
+		if (_backoff < 60) {
+			_backoff += 10;
+		}
+		LOG_ERROR (
+			N_("Remote encode of %1 on %2 failed (%3); thread sleeping for %4s"),
+			video->index(), _server.host_name(), e.what(), _backoff
+			);
+
+		boost::this_thread::sleep (boost::posix_time::seconds(_backoff));
+		return optional<Data>();
+	}
+}
+