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7120742701
Now that we have moved WebRTC from src/webrtc to src/, common_types.h and typedefs.h are triggering a cpplint error. The cpplint complaint is: Include the directory when naming .h files [build/include] [4] This CL disables the error but we have to remove these two headers from the root directory. NOPRESUBMIT=true Bug: webrtc:5876 Change-Id: I08e1b69aadcc4b28ab83bf25e3819d135d41d333 Reviewed-on: https://webrtc-review.googlesource.com/1577 Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@google.com> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19859}
75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef SYSTEM_WRAPPERS_INCLUDE_RTP_TO_NTP_ESTIMATOR_H_
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#define SYSTEM_WRAPPERS_INCLUDE_RTP_TO_NTP_ESTIMATOR_H_
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#include <list>
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#include "system_wrappers/include/ntp_time.h"
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#include "typedefs.h" // NOLINT(build/include)
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namespace webrtc {
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// Class for converting an RTP timestamp to the NTP domain in milliseconds.
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// The class needs to be trained with (at least 2) RTP/NTP timestamp pairs from
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// RTCP sender reports before the convertion can be done.
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class RtpToNtpEstimator {
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public:
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RtpToNtpEstimator();
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~RtpToNtpEstimator();
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// RTP and NTP timestamp pair from a RTCP SR report.
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struct RtcpMeasurement {
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RtcpMeasurement(uint32_t ntp_secs, uint32_t ntp_frac, uint32_t timestamp);
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bool IsEqual(const RtcpMeasurement& other) const;
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NtpTime ntp_time;
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uint32_t rtp_timestamp;
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};
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// Estimated parameters from RTP and NTP timestamp pairs in |measurements_|.
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struct Parameters {
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double frequency_khz = 0.0;
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double offset_ms = 0.0;
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bool calculated = false;
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};
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// Updates measurements with RTP/NTP timestamp pair from a RTCP sender report.
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// |new_rtcp_sr| is set to true if a new report is added.
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bool UpdateMeasurements(uint32_t ntp_secs,
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uint32_t ntp_frac,
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uint32_t rtp_timestamp,
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bool* new_rtcp_sr);
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// Converts an RTP timestamp to the NTP domain in milliseconds.
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// Returns true on success, false otherwise.
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bool Estimate(int64_t rtp_timestamp, int64_t* rtp_timestamp_ms) const;
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const Parameters& params() const { return params_; }
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static const int kMaxInvalidSamples = 3;
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private:
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void UpdateParameters();
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int consecutive_invalid_samples_;
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std::list<RtcpMeasurement> measurements_;
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Parameters params_;
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};
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// Returns:
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// 1: forward wrap around.
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// 0: no wrap around.
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// -1: backwards wrap around (i.e. reordering).
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int CheckForWrapArounds(uint32_t new_timestamp, uint32_t old_timestamp);
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} // namespace webrtc
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#endif // SYSTEM_WRAPPERS_INCLUDE_RTP_TO_NTP_ESTIMATOR_H_
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