| // Copyright 2017 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CHROME_BROWSER_VR_SLIDING_AVERAGE_H_ |
| #define CHROME_BROWSER_VR_SLIDING_AVERAGE_H_ |
| |
| #include <vector> |
| |
| #include "base/macros.h" |
| #include "base/time/time.h" |
| #include "chrome/browser/vr/sample_queue.h" |
| #include "chrome/browser/vr/vr_export.h" |
| |
| namespace vr { |
| |
| class VR_EXPORT SlidingAverage { |
| public: |
| explicit SlidingAverage(size_t window_size); |
| ~SlidingAverage(); |
| |
| void AddSample(int64_t value); |
| int64_t GetAverageOrDefault(int64_t default_value) const; |
| int64_t GetAverage() const { return GetAverageOrDefault(0); } |
| size_t GetCount() const { return values_.GetCount(); } |
| |
| private: |
| SampleQueue values_; |
| DISALLOW_COPY_AND_ASSIGN(SlidingAverage); |
| }; |
| |
| class VR_EXPORT SlidingTimeDeltaAverage { |
| public: |
| explicit SlidingTimeDeltaAverage(size_t window_size); |
| virtual ~SlidingTimeDeltaAverage(); |
| |
| virtual void AddSample(base::TimeDelta value); |
| base::TimeDelta GetAverageOrDefault(base::TimeDelta default_value) const; |
| base::TimeDelta GetAverage() const { |
| return GetAverageOrDefault(base::TimeDelta()); |
| } |
| size_t GetCount() const { return sample_microseconds_.GetCount(); } |
| |
| private: |
| SlidingAverage sample_microseconds_; |
| DISALLOW_COPY_AND_ASSIGN(SlidingTimeDeltaAverage); |
| }; |
| |
| } // namespace vr |
| |
| #endif // CHROME_BROWSER_VR_SLIDING_AVERAGE_H_ |