| /* |
| * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #ifndef WEBRTC_MODULES_RTP_RTCP_INTERFACE_REMOTE_NTP_TIME_ESTIMATOR_H_ |
| #define WEBRTC_MODULES_RTP_RTCP_INTERFACE_REMOTE_NTP_TIME_ESTIMATOR_H_ |
| |
| #include "webrtc/system_wrappers/interface/rtp_to_ntp.h" |
| #include "webrtc/system_wrappers/interface/scoped_ptr.h" |
| |
| namespace webrtc { |
| |
| class Clock; |
| class RtpRtcp; |
| class TimestampExtrapolator; |
| |
| // RemoteNtpTimeEstimator can be used to estimate a given RTP timestamp's NTP |
| // time in local timebase. |
| // Note that it needs to be trained with at least 2 RTCP SR (by calling |
| // |UpdateRtcpTimestamp|) before it can be used. |
| class RemoteNtpTimeEstimator { |
| public: |
| explicit RemoteNtpTimeEstimator(Clock* clock); |
| |
| ~RemoteNtpTimeEstimator(); |
| |
| // Updates the estimator with the timestamp from newly received RTCP SR for |
| // |ssrc|. The RTCP SR is read from |rtp_rtcp|. |
| bool UpdateRtcpTimestamp(uint32_t ssrc, RtpRtcp* rtp_rtcp); |
| |
| // Estimates the NTP timestamp in local timebase from |rtp_timestamp|. |
| // Returns the NTP timestamp in ms when success. -1 if failed. |
| int64_t Estimate(uint32_t rtp_timestamp); |
| |
| private: |
| Clock* clock_; |
| scoped_ptr<TimestampExtrapolator> ts_extrapolator_; |
| RtcpList rtcp_list_; |
| DISALLOW_COPY_AND_ASSIGN(RemoteNtpTimeEstimator); |
| }; |
| |
| } // namespace webrtc |
| |
| #endif // WEBRTC_MODULES_RTP_RTCP_INTERFACE_REMOTE_NTP_TIME_ESTIMATOR_H_ |