| /* |
| * 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_ |