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