56 lines
1.5 KiB
C++
56 lines
1.5 KiB
C++
/*
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* Copyright (c) 2011 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 RTC_BASE_TIME_TIMESTAMP_EXTRAPOLATOR_H_
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#define RTC_BASE_TIME_TIMESTAMP_EXTRAPOLATOR_H_
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#include <stdint.h>
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#include "rtc_base/synchronization/rw_lock_wrapper.h"
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namespace webrtc {
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class TimestampExtrapolator {
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public:
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explicit TimestampExtrapolator(int64_t start_ms);
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~TimestampExtrapolator();
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void Update(int64_t tMs, uint32_t ts90khz);
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int64_t ExtrapolateLocalTime(uint32_t timestamp90khz);
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void Reset(int64_t start_ms);
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private:
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void CheckForWrapArounds(uint32_t ts90khz);
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bool DelayChangeDetection(double error);
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RWLockWrapper* _rwLock;
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double _w[2];
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double _pP[2][2];
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int64_t _startMs;
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int64_t _prevMs;
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uint32_t _firstTimestamp;
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int32_t _wrapArounds;
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int64_t _prevUnwrappedTimestamp;
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int64_t _prevWrapTimestamp;
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const double _lambda;
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bool _firstAfterReset;
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uint32_t _packetCount;
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const uint32_t _startUpFilterDelayInPackets;
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double _detectorAccumulatorPos;
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double _detectorAccumulatorNeg;
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const double _alarmThreshold;
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const double _accDrift;
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const double _accMaxError;
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const double _pP11;
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};
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} // namespace webrtc
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#endif // RTC_BASE_TIME_TIMESTAMP_EXTRAPOLATOR_H_
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