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| 1 // Copyright (c) 2015 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef MEDIA_CAPTURE_CONTENT_SMOOTH_EVENT_SAMPLER_H_ | 5 #ifndef MEDIA_CAPTURE_CONTENT_SMOOTH_EVENT_SAMPLER_H_ |
| 6 #define MEDIA_CAPTURE_CONTENT_SMOOTH_EVENT_SAMPLER_H_ | 6 #define MEDIA_CAPTURE_CONTENT_SMOOTH_EVENT_SAMPLER_H_ |
| 7 | 7 |
| 8 #include "base/macros.h" | 8 #include "base/macros.h" |
| 9 #include "base/time/time.h" | 9 #include "base/time/time.h" |
| 10 #include "media/capture/capture_export.h" | 10 #include "media/base/media_export.h" |
| 11 | 11 |
| 12 namespace media { | 12 namespace media { |
| 13 | 13 |
| 14 // Filters a sequence of events to achieve a target frequency. | 14 // Filters a sequence of events to achieve a target frequency. |
| 15 class CAPTURE_EXPORT SmoothEventSampler { | 15 class MEDIA_EXPORT SmoothEventSampler { |
| 16 public: | 16 public: |
| 17 explicit SmoothEventSampler(base::TimeDelta min_capture_period); | 17 explicit SmoothEventSampler(base::TimeDelta min_capture_period); |
| 18 | 18 |
| 19 // Get/Set minimum capture period. When setting a new value, the state of the | 19 // Get/Set minimum capture period. When setting a new value, the state of the |
| 20 // sampler is retained so that sampling will continue smoothly. | 20 // sampler is retained so that sampling will continue smoothly. |
| 21 base::TimeDelta min_capture_period() const { return min_capture_period_; } | 21 base::TimeDelta min_capture_period() const { return min_capture_period_; } |
| 22 void SetMinCapturePeriod(base::TimeDelta p); | 22 void SetMinCapturePeriod(base::TimeDelta p); |
| 23 | 23 |
| 24 // Add a new event to the event history, and consider whether it ought to be | 24 // Add a new event to the event history, and consider whether it ought to be |
| 25 // sampled. The event is not recorded as a sample until RecordSample() is | 25 // sampled. The event is not recorded as a sample until RecordSample() is |
| (...skipping 19 matching lines...) Expand all Loading... |
| 45 base::TimeTicks current_event_; | 45 base::TimeTicks current_event_; |
| 46 base::TimeTicks last_sample_; | 46 base::TimeTicks last_sample_; |
| 47 base::TimeDelta token_bucket_; | 47 base::TimeDelta token_bucket_; |
| 48 | 48 |
| 49 DISALLOW_COPY_AND_ASSIGN(SmoothEventSampler); | 49 DISALLOW_COPY_AND_ASSIGN(SmoothEventSampler); |
| 50 }; | 50 }; |
| 51 | 51 |
| 52 } // namespace media | 52 } // namespace media |
| 53 | 53 |
| 54 #endif // MEDIA_CAPTURE_CONTENT_SMOOTH_EVENT_SAMPLER_H_ | 54 #endif // MEDIA_CAPTURE_CONTENT_SMOOTH_EVENT_SAMPLER_H_ |
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