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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 <stdint.h>
#include "system_wrappers/include/clock.h"
#include "system_wrappers/include/ntp_time.h"
namespace webrtc {
namespace test {
class DriftingClock : public Clock {
public:
static constexpr float kNoDrift = 1.0f;
DriftingClock(Clock* clock, float speed);
static constexpr float PercentsFaster(float percent) {
return 1.0f + percent / 100.0f;
}
static constexpr float PercentsSlower(float percent) {
return 1.0f - percent / 100.0f;
}
Timestamp CurrentTime() override { return Drift(clock_->CurrentTime()); }
NtpTime ConvertTimestampToNtpTime(Timestamp timestamp) override {
return Drift(clock_->ConvertTimestampToNtpTime(timestamp));
}
private:
TimeDelta Drift() const;
Timestamp Drift(Timestamp timestamp) const;
NtpTime Drift(NtpTime ntp_time) const;
Clock* const clock_;
const float drift_;
const Timestamp start_time_;
};
} // namespace test
} // namespace webrtc
#endif // TEST_DRIFTING_CLOCK_H_
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