Rename RtcpHandler to MediaHandler

include/rtc/mediahandlerelement.hpp

@@ -0,0 +1,118 @@
+/**
+ * Copyright (c) 2020 Filip Klembara (in2core)
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef RTC_MEDIA_HANDLER_ELEMENT_H
+#define RTC_MEDIA_HANDLER_ELEMENT_H
+
+#if RTC_ENABLE_MEDIA
+
+#include "include.hpp"
+#include "message.hpp"
+#include "rtp.hpp"
+
+namespace rtc {
+
+using ChainedMessagesProduct = std::shared_ptr<std::vector<binary_ptr>>;
+
+RTC_CPP_EXPORT ChainedMessagesProduct make_chained_messages_product();
+RTC_CPP_EXPORT ChainedMessagesProduct make_chained_messages_product(message_ptr msg);
+
+/// Ougoing messages
+struct RTC_CPP_EXPORT ChainedOutgoingProduct {
+	ChainedOutgoingProduct(ChainedMessagesProduct messages, std::optional<message_ptr> control = nullopt);
+	const ChainedMessagesProduct messages;
+	const std::optional<message_ptr> control;
+};
+
+/// Ougoing response to incoming messages
+struct RTC_CPP_EXPORT ChainedOutgoingResponseProduct {
+	ChainedOutgoingResponseProduct(std::optional<ChainedMessagesProduct> messages = nullopt, std::optional<message_ptr> control = nullopt);
+	const std::optional<ChainedMessagesProduct> messages;
+	const std::optional<message_ptr> control;
+};
+
+/// Incoming messages with response
+struct RTC_CPP_EXPORT ChainedIncomingProduct {
+	ChainedIncomingProduct(std::optional<ChainedMessagesProduct> incoming = nullopt, std::optional<ChainedMessagesProduct> outgoing = nullopt);
+	const std::optional<ChainedMessagesProduct> incoming;
+	const std::optional<ChainedOutgoingResponseProduct> outgoing;
+};
+
+/// Incoming control messages with response
+struct RTC_CPP_EXPORT ChainedIncomingControlProduct {
+	ChainedIncomingControlProduct(message_ptr incoming, std::optional<ChainedOutgoingResponseProduct> outgoing = nullopt);
+	const std::optional<message_ptr> incoming;
+	const std::optional<ChainedOutgoingResponseProduct> outgoing;
+};
+
+/// Chainable handler
+class RTC_CPP_EXPORT MediaHandlerElement: public std::enable_shared_from_this<MediaHandlerElement> {
+	std::optional<std::shared_ptr<MediaHandlerElement>> upstream = nullopt;
+	std::optional<std::shared_ptr<MediaHandlerElement>> downstream = nullopt;
+
+	void prepareAndSendResponse(std::optional<ChainedOutgoingResponseProduct> outgoing, std::function<bool (ChainedOutgoingResponseProduct)> send);
+
+	void removeFromChain();
+public:
+	MediaHandlerElement();
+
+	/// Creates response to incoming message
+	/// @param messages Current repsonse
+	/// @returns New response
+	std::optional<ChainedOutgoingResponseProduct> processOutgoingResponse(ChainedOutgoingResponseProduct messages);
+
+	// Process incoming and ougoing messages
+	std::optional<message_ptr> formIncomingControlMessage(message_ptr message, std::function<bool (ChainedOutgoingResponseProduct)> send);
+	std::optional<ChainedMessagesProduct> formIncomingBinaryMessage(ChainedMessagesProduct messages, std::function<bool (ChainedOutgoingResponseProduct)> send);
+	std::optional<message_ptr> formOutgoingControlMessage(message_ptr message);
+	std::optional<ChainedOutgoingProduct> formOutgoingBinaryMessage(ChainedOutgoingProduct product);
+
+	/// Process current control message
+	/// @param messages current message
+	/// @returns Modified message and response
+	virtual ChainedIncomingControlProduct processIncomingControlMessage(message_ptr messages);
+
+	/// Process current control message
+	/// @param messages current message
+	/// @returns Modified message
+	virtual message_ptr processOutgoingControlMessage(message_ptr messages);
+
+	/// Process current binary message
+	/// @param messages current message
+	/// @returns Modified message and response
+	virtual ChainedIncomingProduct processIncomingBinaryMessage(ChainedMessagesProduct messages);
+
+	/// Process current binary message
+	/// @param messages current message
+	/// @param control current control message
+	/// @returns Modified binary message and control message
+	virtual ChainedOutgoingProduct processOutgoingBinaryMessage(ChainedMessagesProduct messages, std::optional<message_ptr> control);
+
+	/// Set given element as upstream to this
+	/// @param upstream Upstream element
+	/// @returns Upstream element
+	std::shared_ptr<MediaHandlerElement> chainWith(std::shared_ptr<MediaHandlerElement> upstream);
+
+	/// Remove all downstream elements from chain
+	void recursiveRemoveChain();
+};
+
+} // namespace rtc
+
+#endif // RTC_ENABLE_MEDIA
+
+#endif // RTC_MEDIA_HANDLER_ELEMENT_H