46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
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/*
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* Copyright (c) 2016 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 WEBRTC_TEST_DRIFTING_CLOCK_H_
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#define WEBRTC_TEST_DRIFTING_CLOCK_H_
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#include "webrtc/system_wrappers/include/clock.h"
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namespace webrtc {
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namespace test {
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class DriftingClock : public Clock {
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public:
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// TODO(danilchap): Make this constants constexpr when it would be supported.
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static const float kDoubleSpeed; // 2.0f;
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static const float kNoDrift; // 1.0f;
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static const float kHalfSpeed; // 0.5f;
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DriftingClock(Clock* clock, float speed);
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// TODO(danilchap): Make this functions constexpr when it would be supported.
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static float PercentsFaster(float percent) { return 1.0f + percent / 100.0f; }
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static float PercentsSlower(float percent) { return 1.0f - percent / 100.0f; }
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int64_t TimeInMilliseconds() const override;
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int64_t TimeInMicroseconds() const override;
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void CurrentNtp(uint32_t& seconds, uint32_t& fractions) const override;
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int64_t CurrentNtpInMilliseconds() const override;
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private:
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float Drift() const;
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Clock* const clock_;
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const float drift_;
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const int64_t start_time_;
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};
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} // namespace test
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} // namespace webrtc
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#endif // WEBRTC_TEST_DRIFTING_CLOCK_H_
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