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/*
* Copyright (c) 2016 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 TEST_DRIFTING_CLOCK_H_
#define TEST_DRIFTING_CLOCK_H_
#include "system_wrappers/include/clock.h"
namespace webrtc {
namespace test {
class DriftingClock : public Clock {
public:
// TODO(danilchap): Make this constants constexpr when it would be supported.
static const float kDoubleSpeed; // 2.0f;
static const float kNoDrift; // 1.0f;
static const float kHalfSpeed; // 0.5f;
DriftingClock(Clock* clock, float speed);
// TODO(danilchap): Make this functions constexpr when it would be supported.
static float PercentsFaster(float percent) { return 1.0f + percent / 100.0f; }
static float PercentsSlower(float percent) { return 1.0f - percent / 100.0f; }
int64_t TimeInMilliseconds() const override;
int64_t TimeInMicroseconds() const override;
NtpTime CurrentNtpTime() const override;
int64_t CurrentNtpInMilliseconds() const override;
private:
float Drift() const;
Clock* const clock_;
const float drift_;
const int64_t start_time_;
};
} // namespace test
} // namespace webrtc
#endif // TEST_DRIFTING_CLOCK_H_
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