Switched from sync transcoder to async transcoder

2020-12-12 14:43:33 +01:00
parent 0586e93655
commit eea27b86f0
34 changed files with 959 additions and 504 deletions
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2020 Emeric Poupon
+ *
+ * This file is part of LMS.
+ *
+ * LMS 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * LMS 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 LMS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "TranscodeResourceHandler.hpp"
+
+namespace Av
+{
+
+	std::unique_ptr<IResourceHandler>
+	createTranscodeResourceHandler(const std::filesystem::path& trackPath, const TranscodeParameters& parameters)
+	{
+		return std::make_unique<TranscodeResourceHandler>(trackPath, parameters);
+	}
+
+	// TODO set some nice HTTP return code
+
+	TranscodeResourceHandler::TranscodeResourceHandler(const std::filesystem::path& trackPath, const TranscodeParameters& parameters)
+		: _transcoder {trackPath, parameters}
+	{
+		_transcoder.start();
+	}
+
+	Wt::Http::ResponseContinuation*
+	TranscodeResourceHandler::processRequest(const Wt::Http::Request& /*request*/, Wt::Http::Response& response)
+	{
+		response.setMimeType(_transcoder.getOutputMimeType());
+
+		if (_nbBytesReady > 0)
+		{
+			response.out().write(reinterpret_cast<const char *>(&_buffer[0]), _nbBytesReady);
+			_nbBytesReady = 0;
+		}
+
+		if (!_transcoder.finished())
+		{
+			Wt::Http::ResponseContinuation *continuation {response.createContinuation()};
+			continuation->waitForMoreData();
+			_transcoder.asyncRead(_buffer.data(), _buffer.size(), [=](std::size_t nbBytesRead)
+			{
+				assert(_nbBytesReady == 0);
+				_nbBytesReady = nbBytesRead;
+				continuation->haveMoreData();
+			});
+
+			return continuation;
+		}
+
+		return {};
+	}
+}
+