Add h264 and opus streaming support to libdatachannel

include/rtc/rtppacketizer.hpp

@@ -0,0 +1,52 @@
+/*
+ * libdatachannel streamer example
+ * 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 RTPPacketizer_hpp
+#define RTPPacketizer_hpp
+
+#include "rtppacketizationconfig.hpp"
+#include "message.hpp"
+
+#if RTC_ENABLE_MEDIA
+
+namespace rtc {
+
+/// Class responsizble for rtp packetization
+class RTPPacketizer {
+    static const auto rtpHeaderSize = 12;
+public:
+    // rtp configuration
+    const std::shared_ptr<RTPPacketizationConfig> rtpConfig;
+
+    /// Constructs packetizer with given RTP configuration.
+    /// @note RTP configuration is used in packetization process which may change some configuration properties such as sequence number.
+    /// @param rtpConfig  RTP configuration
+    RTPPacketizer(std::shared_ptr<RTPPacketizationConfig> rtpConfig);
+
+    /// Creates RTP packet for given payload based on `rtpConfig`.
+    /// @note This function increase sequence number after packetization.
+    /// @param payload RTP payload
+    /// @param setMark Set marker flag in RTP packet if true
+    virtual message_ptr packetize(binary payload, bool setMark);
+};
+
+}   // namespace
+
+#endif /* RTC_ENABLE_MEDIA */
+
+#endif /* RTPPacketizer_hpp */