1 // Copyright 2019 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CAST_STREAMING_RTCP_SESSION_H_ 6 #define CAST_STREAMING_RTCP_SESSION_H_ 7 8 #include "cast/streaming/ntp_time.h" 9 #include "cast/streaming/ssrc.h" 10 11 namespace openscreen { 12 namespace cast { 13 14 // Session-level configuration and shared components for the RTCP messaging 15 // associated with a single Cast RTP stream. Multiple packet serialization and 16 // parsing components share a single RtcpSession instance for data consistency. 17 class RtcpSession { 18 public: 19 // |start_time| should be the current time, as it is used by NtpTimeConverter 20 // to set a fixed reference point between the local Clock and current "real 21 // world" wall time. 22 RtcpSession(Ssrc sender_ssrc, 23 Ssrc receiver_ssrc, 24 Clock::time_point start_time); 25 ~RtcpSession(); 26 sender_ssrc()27 Ssrc sender_ssrc() const { return sender_ssrc_; } receiver_ssrc()28 Ssrc receiver_ssrc() const { return receiver_ssrc_; } ntp_converter()29 const NtpTimeConverter& ntp_converter() const { return ntp_converter_; } 30 31 private: 32 const Ssrc sender_ssrc_; 33 const Ssrc receiver_ssrc_; 34 35 // Translates between system time (internal format) and NTP (wire format). 36 NtpTimeConverter ntp_converter_; 37 }; 38 39 } // namespace cast 40 } // namespace openscreen 41 42 #endif // CAST_STREAMING_RTCP_SESSION_H_ 43