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danilchap9c6a0c72016-02-10 10:54:47 -08001/*
2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
Mirko Bonadei92ea95e2017-09-15 06:47:31 +020010#ifndef TEST_DRIFTING_CLOCK_H_
11#define TEST_DRIFTING_CLOCK_H_
danilchap9c6a0c72016-02-10 10:54:47 -080012
Yves Gerey3e707812018-11-28 16:47:49 +010013#include <stdint.h>
14
Mirko Bonadei92ea95e2017-09-15 06:47:31 +020015#include "system_wrappers/include/clock.h"
Yves Gerey3e707812018-11-28 16:47:49 +010016#include "system_wrappers/include/ntp_time.h"
danilchap9c6a0c72016-02-10 10:54:47 -080017
18namespace webrtc {
19namespace test {
20class DriftingClock : public Clock {
21 public:
22 // TODO(danilchap): Make this constants constexpr when it would be supported.
23 static const float kDoubleSpeed; // 2.0f;
24 static const float kNoDrift; // 1.0f;
25 static const float kHalfSpeed; // 0.5f;
26
27 DriftingClock(Clock* clock, float speed);
28
29 // TODO(danilchap): Make this functions constexpr when it would be supported.
30 static float PercentsFaster(float percent) { return 1.0f + percent / 100.0f; }
31 static float PercentsSlower(float percent) { return 1.0f - percent / 100.0f; }
32
Sebastian Jansson4de31152019-06-11 08:52:11 +020033 Timestamp CurrentTime() override;
Sebastian Jansson2a96ab22019-01-30 20:44:45 +010034 NtpTime CurrentNtpTime() override;
35 int64_t CurrentNtpInMilliseconds() override;
danilchap9c6a0c72016-02-10 10:54:47 -080036
37 private:
Sebastian Jansson4de31152019-06-11 08:52:11 +020038 TimeDelta Drift() const;
danilchap9c6a0c72016-02-10 10:54:47 -080039
40 Clock* const clock_;
41 const float drift_;
Sebastian Jansson4de31152019-06-11 08:52:11 +020042 const Timestamp start_time_;
danilchap9c6a0c72016-02-10 10:54:47 -080043};
44} // namespace test
45} // namespace webrtc
46
Mirko Bonadei92ea95e2017-09-15 06:47:31 +020047#endif // TEST_DRIFTING_CLOCK_H_